KR20220059322A - Vacuum adiabatic body - Google Patents

Abstract

The vacuum insulator of the present invention, the first plate; second plate; A sealing part for sealing the first plate and the second plate may be included to provide a vacuum space part. Optionally, the vacuum insulator of the present invention may include a supporter for maintaining the vacuum space portion. Optionally, the vacuum insulator of the present invention may include a heat transfer resistor for reducing the amount of heat transfer between the first plate and the second plate. Optionally, it may include a part fastening part connected to at least one of the first and second plates to which the parts are coupled. Optionally, it may include a second plate providing the seal. Optionally, it may include an outer panel placed on the outside of the second plate when the vacuum space portion as a center. According to this, it is possible to improve the productivity of the vacuum insulator.

Description

Manufacturing method of vacuum insulator {Vacuum adiabatic body}

The present invention relates to a vacuum insulator.

The insulation performance can be improved by constructing an insulation wall with vacuum. At least a part of the inner space is made of vacuum, and a device for forming a thermal insulation effect may be referred to as a vacuum insulator.

The applicant has developed a technology to obtain a vacuum insulator that can be used in various devices and home appliances, and has disclosed the vacuum insulator of Republic of Korea Application Nos. 10-2015-0109724 and 10-2015-0109722.

In the cited document, a plurality of members are fastened to provide a vacuum space portion. Specifically, the first plate, the conductive resistance sheet, the side plate, and the second plate are sealed to each other. In order to seal the fastening portion of each member, a sealing process is performed.

The vacuum insulator of the cited document has a tube for evacuating the air inside the vacuum space or introducing a getter. In the cited literature, there is no suggestion about a method of providing a pipe in consideration of sealing reliability, fastening strength of the pipe, oxidation prevention, fastening reliability, and productivity. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Republic of Korea Application No. 10-2015-0109724, vacuum insulator Republic of Korea Application No. 10-2015-0109722, vacuum insulator

The present invention proposes a method for providing a tube capable of improving sealing reliability for the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The present invention proposes a method of manufacturing a vacuum insulator for improving the fastening force of a dissimilar metal having a second material of a plate made of a material suitable for a vacuum space portion and a tube having a pressure-welding first material.

The present invention proposes a method for manufacturing a vacuum insulator that prevents oxidation of a tube by the high-temperature atmosphere in the exhaust process of the vacuum space part and the high-temperature atmosphere in the bonding process of the tube and the plate.

The present invention proposes a method for manufacturing a vacuum insulator that improves the reliability of fastening between a tube and a member to which the tube is fastened.

The present invention proposes a method for manufacturing a vacuum insulator that improves the productivity of the vacuum insulator in which a tube is provided.

In addition to the examples presented above, the present invention proposes specific solutions and means for solving them in [Means for Solving the Problems] and [Specific Contents for Implementing the Invention].

The vacuum insulator of the present invention, the first plate; second plate; A sealing part for sealing the first plate and the second plate may be included to provide a vacuum space part. Optionally, the vacuum insulator of the present invention may include a supporter for maintaining the vacuum space portion. Optionally, the vacuum insulator of the present invention may include a heat transfer resistor for reducing the amount of heat transfer between the first plate and the second plate. Optionally, it may include a part fastening part connected to at least one of the first and second plates to which the parts are coupled. Accordingly, it is possible to provide a vacuum insulator that can achieve the industrial purpose.

Optionally, a pipe for exhausting the air of the vacuum space may be included. Accordingly, it is possible to exhaust the internal air of the vacuum space portion. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the vacuum insulator may include a vacuum insulator component preparation step in which parts forming the vacuum insulator are prepared in advance. Optionally, the vacuum insulator may include a vacuum insulator component assembly step in which the prepared parts are assembled. Optionally, the vacuum insulator may be manufactured by a vacuum insulator evacuation step in which the gas of the vacuum space is discharged after the component assembly step.

Optionally, in at least one of the vacuum insulator component assembly step and the vacuum insulator vacuum exhaust step, a sealing jig for sealing the inside of the tube may be mounted on the tube. According to this configuration, an oxidizing atmosphere may not be created in the inner space of the tube by the sealing jig. Accordingly, the inner surface of the tube may not be oxidized during the high-temperature process. According to this, it is possible to prevent leakage when one end of the tube is closed.

Optionally, the inner space of the sealed tube may be filled with gas. According to this, the formation of an oxidizing atmosphere can be prevented. Accordingly, it is possible to prevent oxidation of the inner surface of the tube in a high-temperature process.

Optionally, the tube may be joined to at least one of the first and second plates in at least one of the component preparation step and the component assembly step.

Optionally, the tube may be joined to at least one of the first and second plates in a step before the vacuum evacuation step is performed. According to this, it is possible to prevent the adverse effect of the high-temperature process applied to the vacuum exhaust on the inner surface of the pipe.

Optionally, it may include a step of sealing the sealing jig at both ends of the tube before the tube is temporarily assembled to the plate. Optionally, before the tube is temporarily assembled to the plate, it may include a step of charging a gas into the tube. Optionally, it may include a step of sealing the hole of the sealing jig before the tube is temporarily assembled to the plate. Accordingly, the oxidizing atmosphere can be removed from the inside of the tube in advance.

Optionally, the tube may be made of copper. Accordingly, it is possible to prepare for the closing process of the pipe in the future.

Optionally, the sealing jig may include first and second sealing jigs for blocking both ends of the tube. Accordingly, it is possible to seal the open tube at both ends.

Optionally, even if the tube is joined to the plate by brazing, the oxidizing atmosphere in the inner space of the tube can be removed. According to this, even in the high temperature atmosphere of the brazing, the inner surface of the tube may not be oxidized.

Optionally, the tube may be closed after the vacuum evacuation step is completed. According to this, the vacuum space part can finally maintain a sealed state by the closing process.

Optionally, the tube may be sealed at one end by pinch-off. In this case, the portion to be pinched off may maintain a clean state suitable for atomic bonding. Accordingly, the pinch-off portion of the tube can maintain high quality.

The method for manufacturing a vacuum insulator of the present invention according to another aspect may include a first step of forming a through hole in at least one of the first and second plates. Optionally, it may include a second step of temporarily assembling a tube in the through hole. Optionally, it may include a third step of performing sealing by mounting a filler metal in the contact portion between the tube and the through hole. Optionally, the method may include a fourth step of evacuating gas in a space formed between the first plate and the second plate. Optionally, a fifth step of sealing the tube may be included. According to this, the internal space of the vacuum insulator can be provided as a vacuum space part. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, when the sealing is performed, a gas for preventing oxidation of the inner surface of the tube may be sealed in the inner space of the tube. According to this, it is possible to prevent the inner surface of the tube from being damaged by the high-temperature atmosphere of the sealing. Here, the damage may include deterioration of the material of the tube due to oxidation.

Optionally, the sealing may be performed by brazing. According to this, even if the plate and the tube are dissimilar metals, the reliability of bonding between them can be secured.

Optionally, sealing of the tube may be performed in a pinch-off. Accordingly, sealing reliability can be improved by intermolecular bonding.

Optionally, a low-temperature block may be mounted where the pinch-off is performed on the pipe during the exhaust process. Accordingly, it is possible to prevent the high-temperature atmosphere of the sealing from affecting the joint portion of the tube.

Optionally, the gas may be already received in the interior space of the tube before the third step. Accordingly, oxidation of the inner surface of the tube can be prevented in advance.

Optionally, a process of sealing a sealing jig at both ends of the tube before the tube is temporarily assembled to the plate may be included. Optionally, before the tube is temporarily assembled to the plate, a process of charging gas into the tube using a hole provided in the sealing jig may be included. Optionally, a process of blocking the hole of the sealing jig before the tube is temporarily assembled to the plate may be included. According to this, the inner surface of the tube can be maintained in a clean state to be suitable for use as the tube.

Optionally, a flange may be formed in the through hole. Accordingly, it is possible to improve the bonding reliability of the tube and the plate.

The method for manufacturing a vacuum insulator of the present invention according to another aspect may include a vacuum insulator component preparation step in which parts forming the vacuum insulator are prepared in advance. Optionally, it may include a vacuum insulator component assembly step in which the prepared components are assembled. Optionally, a vacuum insulator vacuum evacuation step in which the gas in the space formed between the first plate and the second plate is exhausted through a predetermined tube after the component assembly step may be included. In this way, a vacuum insulator can be manufactured. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, in at least one of the vacuum insulator component assembly step and the vacuum insulator vacuum exhaust step, a low-temperature block may be mounted on the tube. According to this, it is possible to prevent oxidation of the tube that is affected by the high-temperature atmosphere during the process.

Optionally, the cold block may be mounted in a sealed position on the tube. Optionally, after performing the vacuum insulator evacuation step, the tube may be sealed by pressure welding. According to this, the inner surface of the portion where the pressure welding is performed maintains a clean state that is not oxidized, so that the sealing performance by the pressure welding can be improved.

Optionally, the pressure welding may be performed by pinch-off. According to this, it is possible to secure a strong fastening force with a mechanical force. Accordingly, it is possible to prevent the vacuum breakage of the tube to improve the vacuum holding capacity of the vacuum space.

According to the present invention, the sealing performance of the inner surface of the tube and the outer surface of the tube is improved, so that leakage of the vacuum space part due to the tube can be prevented.

According to the present invention, the inner surface of the tube is maintained in a clean state to prevent poor pressure welding, and perfect bonding between atoms of the material constituting the tube can be achieved.

According to the present invention, it is possible to prevent surface denaturation of the tube caused by the high-frequency environment during heterogeneous bonding of the tube and the plate, thereby improving the sealing reliability during the pressure welding of the tube.

According to the present invention, even if the tube is placed in a high-temperature atmosphere in the exhaust process of the vacuum space part and in a high-temperature atmosphere in the bonding process of the tube and the plate, the surface of the tube can maintain a relatively low temperature state. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

According to the present invention, it is possible to improve the productivity of the vacuum insulator.

1 is a perspective view of a refrigerator according to an embodiment;
2 is a view schematically showing a vacuum insulator used for a main body and a door of a refrigerator;
3 is a view showing an embodiment of a support for holding a vacuum space portion.
4 is a view for explaining an embodiment of a vacuum insulator centering on a heat transfer resistor.
5 is a graph for observing the process of evacuating the inside of the vacuum insulator with time and pressure when a support is used.
6 is a graph comparing vacuum pressure and gas conductivity.
7 is a view showing various embodiments of a vacuum space unit.
8 is a view for explaining an additional thermal insulator;
9 is a view for explaining a heat transfer path between first and second plates having different temperatures.
10 is a view for explaining a branch on a heat transfer path between first and second plates having different temperatures;
11 is a view for explaining a method of manufacturing a vacuum insulator.
12 is an enlarged perspective view above the corner where the tube is installed in the vacuum insulator
13 is a view for explaining a method of processing a through hole of the first plate.
Fig. 14 is a cross-sectional view taken along line 1-1' of Fig. 12(b).
15 is a view showing an embodiment in which the flange extends toward the outside of the vacuum space.
16 is a view for explaining a process of forming a vacuum space using a tube.
17 is a view for explaining the piercing process.
18 is a view for explaining a burring process.
19 is a view showing a state in which filler metal is installed.
20 and 21 are views showing the installation state of the first and second sealing jigs.
22 is a view showing a state in which both ends of the tube are sealed.
It is a figure explaining a brazing process.
24 is a view showing a state in which the sealing jig is separated;
Fig. 25 is a view for explaining a pinch-off process;
26 is a view for explaining a tube in which copper oxide is produced;

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented below, and those skilled in the art who understand the spirit of the present invention may add other embodiments included within the scope of the same spirit to components or components, Changes, deletions, and additions may be easily suggested, but this will also be included within the scope of the present invention. The present invention may have many embodiments in which the idea is implemented, and in each embodiment, any part may be replaced with a corresponding part or a part having a related action in another embodiment. The present invention may be any one of the examples presented below or an example in which two or more are combined.

The present invention, the first plate; second plate; a vacuum space formed between the first and second plates; It may be a vacuum adiabatic body including a seal for providing the vacuum space (vacuum space). The vacuum space part may be a space in a vacuum state provided in the inner space between the first plate and the second plate. The sealing part may seal the first plate and the second plate to provide an internal space provided in a vacuum state. The vacuum insulator may optionally include a side plate connecting the first plate and the second plate. In the present invention, the expression plate may mean at least one of the first and second plates and the side plate. At least a portion of the first and second plates and the side plate may be integrally formed, or at least a portion may be sealed with each other. Optionally, the vacuum insulator may include a support for maintaining the vacuum space portion. The vacuum insulator selectively reduces the amount of heat transfer between the first space provided in the vicinity of the first plate and the second space provided in the vicinity of the second plate, or between the first plate and the second plate. A thermal insulator may be included to reduce the amount of heat transfer. Optionally, the vacuum insulator may include a fastening part formed on at least a portion of the plate. Optionally, the vacuum insulator may include another adiabatic body. The additional insulator may be provided to be connected to the vacuum insulator. The additional heat insulator may be a heat insulator having the same or a different degree of vacuum as the vacuum insulator. The additional heat insulator may be a heat insulator that does not include a vacuum level or lower than that of the vacuum insulator or a part in a vacuum state therein. In this case, it may be advantageous to connect another object to the additional thermal insulator.

In the present invention, the direction along the wall defining the vacuum space may include a longitudinal direction of the vacuum space and a height direction of the vacuum space. A height direction of the vacuum space portion may be defined as any one direction among virtual lines connecting a first space and a second space to be described later while penetrating the vacuum space portion. The longitudinal direction of the vacuum space portion may be defined as a direction perpendicular to the set height direction of the vacuum space portion. In the present invention, that the object A is connected to the object B means that at least a part of the object A and at least a part of the object B are directly connected, or at least a part of the object A and at least a part of the object B are connected to the objects A and B It can be defined as being connected through an intermediate. The medium may be provided to at least one of object A and object B. The connection may include that the object A is connected to the medium, and the medium is connected to the object B. A part of the medium may include a part connected to either one of object A and object B. The other part of the medium may include a part connected to the other of the object A and the object B. As a variant, the connection of the object A to the object B may include that the object A and the object B are integrally prepared in a shape connected in the above-described manner. In the present invention, an embodiment of the connection may be a support, a combination, or a seal, which will be described later. In the present invention, that object A is supported by object B means that object A is supported by object B in one or more of +X, -X, +Y, -Y, +Z, and -Z axis directions. It can be defined that movement is restricted. In the present invention, an embodiment of the support may be a coupling or sealing, which will be described later. In the present invention, that the object A is coupled to the object B may define that the object A is restricted from moving by the object B in one or more of the X, Y, and Z-axis directions. In the present invention, an embodiment of the coupling may be a sealing to be described later. In the present invention, that the object A is sealed to the object B may define a state in which the movement of the fluid is not allowed in the portion where the object A and the object B are connected. In the present invention, one or more objects, i.e., object A and at least a portion of object B, include a portion of object A, all of object A, a portion of object B, all of object B, a portion of object A and a portion of object B; It can be defined as including part of object A and all of object B, all of object A and part of object B, and all of object A and all of object B. In the present invention, that the plate A may be a wall defining the space A may be defined as that at least a part of the plate A may be a wall defining at least a part of the space A. That is, at least a part of the plate A may be a wall forming the space A, or the plate A may be a wall forming at least a part of the space A. In the present invention, when the object is divided into three equal parts based on the longitudinal direction of the object, the central portion of the object may be defined as a central portion among the three divided portions. The peripheral portion of the object may be defined as a portion located to the left or right of the central portion among the three divided portions. The peripheral portion of the object may include a surface in contact with the central portion and a surface opposite thereto. The opposite side may be defined as a border or edge of the object. Examples of the object may be a vacuum insulator, a plate, a heat transfer resistor, a support, a vacuum space, and various parts to be introduced in the present invention. In the present invention, the degree of heat transfer resistance (Degree of heat transfer resistance) indicates the degree to which an object resists heat transfer, and can be defined as a value determined by the shape including the thickness of the object, the material of the object, and the processing method of the object. can The heat transfer resistance may be defined as the sum of a degree of conduction resistance, a degree of radiation resistance, and a degree of convection resistance. It may include a heat transfer path formed between spaces with different temperatures, or a heat transfer path formed between plates having different temperatures.For example, the vacuum insulator of the present invention provides It may include a heat transfer path through which cold is transferred toward the high plate In the present invention, the curved portion includes a first portion in which the object extends in a first direction and a second portion in which the object is different from the first direction. When a second portion extending in the direction is included, it may be defined as a portion connecting the first portion and the second portion (including 90 degrees).

In the present invention, the vacuum insulator may optionally include a fastening part. The part fastening part may be defined as a part provided on the plate to which parts are connected. The part connected to the plate may be defined as a penetrating part disposed to penetrate at least a part of the plate and a surface part disposed to be connected to the surface of at least a part of the plate. At least one of a penetrating part and a surface part may be connected to the part fastening part. The penetrating part may be a part that mainly forms a path through which a fluid (electricity, refrigerant, water, air, etc.) passes. In the present invention, a fluid is defined as any kind of flowing body. The fluid includes moving solids, liquids and gases and electricity. For example, the component may be a component that forms a path through which a refrigerant for heat exchange passes, such as a Suction Line Heat Exchanger (SLHX) or a refrigerant pipe. The component may be a wire that supplies electricity to the device (Apparatus). As another example, the component may be a component that forms a path through which air can pass, such as a cold air duct, a hot air duct, and an exhaust port. As another example, the component may be a path through which a fluid such as coolant, hot water, ice, and defrost water may pass. The ultrasonic parts include peripheral insulation, side panel, foam injected, pre-prepared resin, hinge, latch, basket, drawer, shelf, lighting, sensor, evaporator, front decoration, and hotline, heater, exterior cover, additional insulation It may include at least one of the body.

As an example to which the vacuum insulator is applied, the present invention may include an apparatus having the vacuum insulator. An example of the device is an appliance. As an example of the appliance, a home appliance including a refrigerator, a cooking appliance, a washing machine, a dishwasher, and an air conditioner, etc. can be heard As an example in which the vacuum insulator is applied to a device, the vacuum insulator may form at least a portion of a body and a door of the device. As an example of the door, the vacuum insulator may form at least a portion of a general door and a door-in-door (DID) in direct contact with the body. Here, the door-in-door may mean a small door placed inside the general door. As another example to which the vacuum insulator is applied, the present invention may include a wall having the vacuum insulator. An example of the wall may be a wall of a building including a window.

Hereinafter, the present invention will be described in detail with reference to the drawings. Each drawing accompanying the embodiment may be different from, exaggerated, or simply indicated from the actual article, and detailed parts may be briefly indicated with features. The embodiment should not be interpreted as being limited only to the size, structure, and shape presented in the drawings. In the embodiments accompanying each drawing, some configurations of the drawings of one embodiment may be applied to some configurations of the drawings of other embodiments, and some structures of certain embodiments may be applied to some structures of other embodiments, provided that the descriptions do not conflict with each other. can In the description of the drawings for the embodiment, the same reference numerals may be assigned to different drawings as reference numerals of specific components constituting the embodiment. Components having the same reference number may perform the same function. For example, the first plate constituting the vacuum insulator has a portion corresponding to the first space throughout all embodiments, and is indicated by reference numeral 10. The first plate may have the same number for all embodiments and may have a portion corresponding to the first space, but the shape of the first plate may be different in each embodiment. Not only the first plate, but also the side plate, the second plate, and an additional thermal insulator can be understood as well.

1 is a perspective view of a refrigerator according to an embodiment, and FIG. 2 is a diagram schematically illustrating a vacuum insulator used for a main body and a door of the refrigerator. Referring to FIG. 1 , a refrigerator 1 includes a main body 2 provided with a cavity 9 for storing stored items, and a door 3 provided to open and close the main body 2 . The door 3 is rotatably or slidably disposed to open and close the cavity 9 . The cavity 9 may provide at least one of a refrigerating compartment and a freezing compartment. A cold source for supplying cold air to the cavity may be provided. For example, the cooling source may be an evaporator 7 that evaporates a refrigerant to take heat. The evaporator 7 may be connected to a compressor 4 that compresses the refrigerant evaporated to the cooling source. The evaporator 7 may be connected to a condenser 5 condensing the compressed refrigerant to the cooling source. The evaporator 7 may be connected to an expander 6 that expands the refrigerant condensed in the cooling source. A fan corresponding to the evaporator and the condenser may be provided to promote heat exchange. As another example, the cooling source may be a heat absorbing surface of the thermoelectric element. A heat absorbing sink may be connected to the heat absorbing surface of the thermoelectric element. A heat sink may be connected to a heat radiation surface of the thermoelectric element. A fan corresponding to the heat absorbing surface and the heat generating surface may be provided to promote heat exchange.

Referring to FIG. 2 , the plates 10 , 15 , and 20 may be walls defining the vacuum space. The plate may be a wall dividing the vacuum space and an external space of the vacuum space. An example of the plate is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The plate may be provided as one part or may be provided to include at least two parts connected to each other. As a first example, the plate may include at least two parts connected to each other in a direction along a wall defining the vacuum space. Any one of the two parts may include a part (eg, the first part) forming the vacuum space part. The first part may be a single part or may include at least two parts that are sealed to each other. The other one of the two parts may include a part (eg, a second part) extending from the first part of the first plate in a direction away from the vacuum space part or extending in an inner direction of the vacuum space part. . As a second example, the plate may include at least two layers connected to each other in a thickness direction of the plate. Any one of the two layers may include a layer (eg, the first portion) forming the vacuum space portion. The other one of the two layers may include a portion (eg, a second portion) provided in an external space (eg, the first space and the second space) of the vacuum space unit. In this case, the second part may be defined as an outer cover of the plate. The other one of the two layers may include a portion (eg, a second portion) provided in the vacuum space portion. In this case, the second part may be defined as an inner cover of the plate.

The plate may include a first plate 10 and a second plate 20 . One surface of the first plate (“the inner surface of the first plate”) provides a wall defining the vacuum space portion, and the other surface of the first plate (“the outer surface of the first plate”) defines the first space wall can be provided. The first space may be a space provided in the vicinity of the first plate, a space formed by the device, or an internal space of the device. In this case, the first plate may be referred to as an inner case. When the first plate and the additional member form the inner space, the first plate and the additional member may be referred to as an inner case. The inner case may include two or more layers. In this case, one of the plurality of layers may be referred to as an inner panel. One surface of the second plate (“the inner surface of the second plate”) provides a wall defining the vacuum space, and the other surface of the second plate (“the outer surface of the second plate”) defines the second space. wall can be provided. The second space may be a space provided near the second plate, another space formed by the device, or an external space of the device. In this case, the second plate may be referred to as an outer case. When the second plate and the additional member form the outer space, the second plate and the additional member may be referred to as an outer case. The outer case may include two or more layers. In this case, one of the plurality of layers may be referred to as an outer panel. The second space may be a space having a higher temperature than the first space or a space having a lower temperature than the first space. Optionally, the plate may include a side plate 15 . In FIG. 2 , the side plate may also perform a function of the conductive resistance sheet 60 to be described later, depending on the location of the side plate. The side plate may include a portion extending in the height direction of the space formed between the first plate and the second plate, or may include a portion extending in the height direction of the vacuum space portion. One surface of the side plate may provide a wall defining the vacuum space portion, and the other surface of the side plate may provide a wall defining an external space of the vacuum space portion. The outer space of the vacuum space part may be at least one of the first space and the second space, or a space in which an additional heat insulating material to be described later is disposed. The side plate may be integrally formed by extending at least one of the first plate and the second plate, or may be a separate component connected to at least one of the first plate and the second plate.

The plate may optionally include curved portions. In the present invention, a plate including a curved portion may be referred to as a bent plate. The curved portion may include at least one of the first plate, the second plate, the side plate, between the first plate and the second plate, between the first plate and the side plate, and between the second plate and the side plate. can be provided on The plate may include at least one of a first curved portion and a second curved portion, an example of which is as follows. First, the side plate may include the first curved portion. A portion of the first curved portion may include a portion connected to the first plate. Another part of the first curved part may include a part connected to the second curved part. In this case, the radius of curvature of the first curved portion and the second curved portion may be large. Another portion of the first curved portion may be connected to an additional straight line portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the curvature radius of the first curved portion and the second curved portion may be small. Second, the side plate may include the second curved part. A portion of the second curved portion may include a portion connected to the second plate. Another portion of the second curved portion may include a portion connected to the first curved portion. In this case, the radius of curvature of the first curved portion and the second curved portion may be large. Another portion of the second curved portion may be connected to an additional straight line portion or an additional curved portion provided between the first curved portion and the second curved portion. In this case, the curvature radius of the first curved portion and the second curved portion may be small. Here, the straight portion may be defined as a portion having a greater radius of curvature than the curved portion. The straight part may be understood as a part having a greater radius of curvature than a perfect plane or curved part. Third, the first plate may include the first curved portion. A portion of the first curved portion may include a portion connected to the side plate. A portion connected to the side plate may be provided at a position away from the second plate in a portion in which the first plate extends in the longitudinal direction of the vacuum space portion. Fourth, the second plate may include the second curved portion. A portion of the second curved portion may include a portion connected to the side plate. A portion connected to the side plate may be provided at a position away from the first plate in a portion in which the second plate extends in the longitudinal direction of the vacuum space portion. The present invention may include a combination of any one of the first and second examples described above and any one of the third and fourth examples described above.

In the present invention, the vacuum space 50 may be defined as a third space. The vacuum space may be a space in which vacuum pressure is maintained. In the present invention, the expression that A has a higher degree of vacuum than B means that the vacuum pressure of A is lower than that of B.

In the present invention, the sealing part 61 may be a portion provided between the first plate and the second plate. Examples of sealing are as follows. The present invention may be any one of the following examples, or a combination of two or more. The sealing may include fusion welding for joining the plurality of objects by melting at least a portion of the plurality of objects. For example, the first plate and the second plate are fused by laser welding or the like in a state where a medium is not interposed, or a medium such as a filler metal is interposed between a part of the first and second plates and a part of the part fastening part. It may be fused by high-frequency brazing or the like in the finished state, or fused by a medium (eg, a melting bond) in which the plurality of objects generate heat. The sealing may include pressure welding for joining the plurality of objects by mechanical pressure applied to at least a portion of the plurality of objects. For example, as a part connected to the part fastening part, an object made of a material having a lower degree of deformation resistance than the plate may be press-contacted by a method such as a pinch-off method.

A machine room 8 may be optionally provided on the outside of the vacuum insulator. The machine room may be defined as a space in which parts connected to the cooling source are accommodated. Optionally, the vacuum insulator may include a tube 40 . The tube may be provided on either side of the vacuum insulator to exhaust the air of the vacuum space unit 50 . Optionally, the vacuum insulator may include a conduit 64 penetrating the vacuum space 50 for installation of parts connected to the first space and the second space. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

3 is a view showing an embodiment of a support for maintaining the vacuum space portion. An example of the support is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The supports 30 , 31 , 33 , and 35 are provided among the plate and a heat transfer resistor to be described later so as to reduce deformation of at least some of the vacuum space 50 , the plate, and a heat transfer resistor to be described later by an external force. It may be provided to support at least a portion. The external force includes at least one of a vacuum pressure and an external force excluding the vacuum pressure. When the deformation occurs in a direction in which the height of the vacuum space portion decreases, the support may reduce an increase in at least one of radiant heat conduction, gas heat conduction, surface heat conduction, and supporter heat conduction, which will be described later. The support may be an object provided to maintain a gap between the first plate and the second plate, or an object provided to support the heat transfer resistor. The support has a greater degree of strain resistance than the plate, or is provided in a portion having a weak degree of strain resistance among parts constituting the vacuum insulator, the device having the vacuum insulator, and the wall having the vacuum insulator. can In the present invention, the degree of deformation resistance indicates the degree to which an object resists deformation due to an external force applied to the object, and the shape including the thickness of the object, the material of the object, and the processing method of the object It can be defined as a value determined by Examples of the portion in which the strain resistance is weak may be a vicinity of a curved portion formed by the plate or at least a portion of the curved portion, a vicinity of an opening formed in a body of a device provided by the plate, or at least a portion of the opening. The support may be disposed to surround at least a portion of the curved portion or the opening or may be provided to correspond to the shape of the curved portion or the opening, but the support is not excluded from being provided on other portions. The opening may be understood as a part of a device including a body and a door capable of opening and closing the opening formed in the body.

An example in which the support is provided to support the plate is as follows. First, at least a portion of the support may be provided in a space formed inside the plate. The plate may include a portion having a plurality of layers, and the support may be provided between the plurality of layers. Optionally, the support may be provided to connect with at least a portion of the plurality of layers or provided to support at least a portion of the plurality of layers. Second, at least a portion of the support may be provided to be connected to a surface formed on the outside of the plate. The support may be provided in the vacuum space part or in an external space of the vacuum space part. For example, the plate may include a plurality of layers, and the support may be provided in any one of the plurality of layers. Optionally, the support may be provided to support the other one of the plurality of layers. As another example, the plate may include a plurality of portions extending in the longitudinal direction, and the support may be provided by any one of the plurality of portions. Optionally, the support may be provided to support the other one of the plurality of parts. As another example, the support may be provided in the vacuum space part or an external space of the vacuum space part as a separate part from the plate. Optionally, the support may be provided to support at least a portion of a surface formed on the outside of the plate. Optionally, the support may be provided to support one surface of the first plate and one surface of the second plate, and one surface of the first plate and one surface of the second plate may be provided to face each other. Third, the support may be provided integrally with the plate. An example in which the support is provided to support the heat transfer resistor may be understood instead of an example in which the support is provided to support the plate. A duplicate description will be omitted.

An example in which the support is designed to reduce heat transfer through the support is as follows. First, at least a portion of the parts disposed in the vicinity of the support may be provided so as not to come into contact with the support or may be provided to be disposed in an empty space provided by the support. Examples of the component include a heat transfer resistor, exhaust port, getter port, which will be described later, a tube or component connected to the plate, a tube or component passing through the vacuum space, a tube or component at least a part of which is disposed in the vacuum space, etc. can be Examples of the empty space may be an empty space provided inside the support, an empty space provided between a plurality of supports, and an empty space provided between a support and a separate component separated from the support. Optionally, at least a portion of the component may be disposed in a through hole formed in the support, disposed between a plurality of bars, disposed between a plurality of connecting plates, or disposed between a plurality of support plates. Optionally, at least a portion of the component may be disposed in a space spaced apart between the plurality of bars, in a space spaced apart between the plurality of connection plates, or in a space spaced apart between the plurality of support plates. Second, insulation may be provided on at least a portion of the support or in the vicinity of at least a portion of the support. The insulating material may be provided to be in contact with the support or provided not to be in contact with the support. The heat insulating material may be provided at a portion in which the support and the plate are in contact. The heat insulating material may be provided on at least a portion of one surface and the other surface of the support, or may be provided to cover at least a portion of one surface and the other surface of the support. The insulating material may be provided on at least a portion of the vicinity of one surface of the support and the vicinity of the other surface of the support, or may be provided to cover at least a portion of the vicinity of one surface of the support and the vicinity of the other surface of the support. The support may include a plurality of bars, and an insulating material may be disposed in a region from a point where any one of the plurality of bars is located to a midpoint between the one bar and surrounding bars. Third, when cold air is transmitted through the support, a heat source may be disposed at a location where the heat insulator described in the second example is disposed. When the temperature of the first space is lower than the temperature of the second space, the heat source may be disposed on the second plate or in the vicinity of the second plate. When heat is transmitted through the support, a cold source may be disposed at a location where the heat insulator described in the second example is disposed. When the temperature of the first space is higher than the temperature of the second space, the cooling source may be disposed on the second plate or in the vicinity of the second plate. As a fourth example, the support may include a portion having a higher heat transfer resistance than a metal or a higher heat transfer resistance than the plate. The support may include a portion having a lower heat transfer resistance than an additional adiabatic body. The support may include at least one of a non-metal material, PPS and glass fiber (GF), low outgassing PC, PPS, and LCP. The reason is that it is possible to obtain high compressive strength, low outgassing and water absorption rates, low thermal conductivity, high compressive strength at high temperatures, and excellent workability. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Examples of the support may be the bars 30 and 31 , the connection plate 35 , the support plate 35 , the porous material 33 , and the filler 33 . In the present invention, the support may include any one of the above examples, or an example in which at least two are combined. As a first example, the support may include bars 30 and 31 that extend in a direction connecting the first plate and the second plate in order to support a gap between the first plate and the second plate. It may contain parts. The bar may include a portion extending in the height direction of the vacuum space portion or may include a portion extending in a direction substantially perpendicular to the direction in which the plate extends. The bar may be provided to support only one of the first plate and the second plate, or the bar may be provided to support both the first plate and the second plate. For example, one surface of the bar may be provided to support a portion of the plate, and the other surface of the bar may be provided so as not to contact another portion of the plate. As another example, one surface of the bar may be provided to support at least a portion of the plate, and the other surface of the bar may be provided to support another portion of the plate. The support includes a bar provided with an empty space therein, the support includes a plurality of bars and an empty space is provided between the plurality of bars, or the support includes a bar and the bar is provided separately from the bars It may be arranged to provide an empty space between the separate parts. The support may optionally include a connecting plate 35 including a portion connected to the bar or a portion connecting a plurality of bars. The connecting plate may include a portion extending in the longitudinal direction of the vacuum space portion or may include a portion extending along the extending direction of the plate. An XZ-plane cross-sectional area of the connecting plate may be greater than an XZ-plane cross-sectional area of the bar. The connecting plate may be provided on at least one of one surface and the other surface of the bar, or may be provided between the one surface and the other surface of the bar. At least one of one surface and the other surface of the bar may be a surface on which the bar supports the plate. The shape of the connecting plate is not limited. The support includes a connection plate provided with an empty space therein, the support includes a plurality of connection plates and an empty space is provided between the plurality of connection plates, or the support includes a connection plate and the connection The plate may be arranged to provide an empty space between the connection plate and a separate component provided separately. As a second example, the support may include a support plate 35 . The support plate may include a portion extending in a longitudinal direction of the vacuum space portion or may include a portion extending along a direction in which the plate extends. The support plate may be provided to support only one of the first plate and the second plate, or the support plate may be provided to support both the first plate and the second plate. For example, one surface of the support plate may be provided to support a portion of the plate, and the other surface of the support plate may be provided so as not to contact another portion of the plate. As another example, one surface of the support plate may be provided to support at least a portion of the plate, and the other surface of the support plate may be provided to support another portion of the plate. The cross-sectional shape of the support plate is not limited. The support includes a support plate provided with an empty space therein, the support includes a plurality of support plates and an empty space is provided between the plurality of support plates, or the support includes a support plate and the support The plate may be arranged to provide an empty space between the support plate and a separate component provided separately. As a third example, the support may include a porous material 33 or a filler 33 . The inside of the vacuum space may be supported by a porous material or a filler. The inside of the vacuum space part may be completely filled by the porous material or the filler. The support may include a plurality of porous materials or a plurality of fillers, and the plurality of porous materials or a plurality of fillers may be arranged to contact each other. When an empty space is provided inside the porous material, an empty space is provided between a plurality of porous materials, or an empty space is provided between the porous material and a separate component distinct from the porous material, the porous material As described above, it may be understood as any one of a connection plate and a support plate. When an empty space is provided inside the filler, an empty space is provided between a plurality of fillers, or an empty space is provided between the filler and a separate component distinct from the filler, the filler is as described above, It may be understood as any one of a connection plate and a support plate. The support of the present invention may include any one of the above examples or an example in which two or more are combined.

Referring to FIG. 3A , as an embodiment, the support may include a bar 31 and a connecting plate and a supporting plate 35 . The connection plate and the support plate may be designed separately. Referring to FIG. 3B , as an embodiment, the support may include a bar 31 , a connecting plate/support plate 35 , and a porous material 33 filled in the vacuum space. The porous material 33 may have a higher emissivity than stainless steel, which is a material of the plate, but since the vacuum space is filled, the resistance efficiency of radiant heat transfer is high. The porous material may also function as a heat transfer resistor to be described later. More preferably, the porous material may perform the function of a radiation resistance sheet to be described later. Referring to FIG. 3C , as an embodiment, the support may include a porous material 33 or a filler 33 . The porous material 33 may be provided in a compressed state so that the filler can maintain the gap between the vacuum space portions. The film 34 may be provided in a state in which a hole is punched as an exemplary PE material. The porous material 33 or the filler may perform both a function of a heat transfer resistor and a function of the support, which will be described later. More preferably, the porous material may perform the function of the radiation resistance sheet to be described later and the function of the support.

4 is a view for explaining an embodiment of the vacuum insulator centering on the heat transfer resistors (32, 33, 60, 63, thermal insulator, heat transfer resistance body). The vacuum insulator of the present invention may optionally include a heat transfer resistor. Examples of the heat transfer resistor are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The heat transfer resistors 32, 33, 60 and 63 may be an object that reduces the amount of heat transfer between the first space and the second space or an object that reduces the amount of heat transfer between the first plate and the second plate. can The heat transfer resistor is disposed on a heat transfer path formed between the first space and the second space or on a heat transfer path formed between the first plate and the second plate. can be placed. The heat transfer resistor may include a portion extending in a direction along a wall defining the vacuum space portion, or the heat transfer resistor may include a portion extending in a direction in which the plate extends. Optionally, the heat transfer resistor may include a portion extending from the plate in a direction away from the vacuum space portion. The heat transfer resistor may be provided on at least a portion of a peripheral portion of the first plate and a peripheral portion of the second plate, or may be provided on at least a portion of an edge of the first plate and the second plate. The heat transfer resistor may be provided in a portion in which the through hole is formed or as a pipe connected to the through hole. A separate tube or a separate part to be distinguished from the tube may be disposed inside the tube. The heat transfer resistor may include a portion having a higher heat transfer resistance than the plate. In this case, the thermal insulation performance of the vacuum insulator can be further improved. A shield 62 may be provided on the outside of the heat transfer resistor to be insulated. The inside of the heat transfer resistor may be insulated by a vacuum space part. The shielding part may be provided with a porous material or a filler in contact with the outside of the inside of the heat transfer resistor. The shielding part may be provided as an insulating structure exemplified by a separate gasket placed outside the inside of the heat transfer resistor. The heat transfer resistor may be a wall defining the third space. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

An example in which the heat transfer resistor is connected to the plate can be understood by replacing the support with the heat transfer resistor in the example in which the support is provided to support the plate. A duplicate description will be omitted. An example in which the heat transfer resistor is connected to the support can be understood by replacing the plate with the support in the example in which the heat transfer resistor is connected to the plate. A duplicate description will be omitted. The example of reducing heat transfer via the heat transfer body may be applied instead of the example of reducing heat transfer via the support, and the same description will be omitted. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

In the present invention, the heat transfer resistor may be any one of a radiation resistance sheet 32 , a porous material 33 , a filler 33 , and a conductive resistance sheet. In the present invention, the heat transfer resistor may include a mixture of at least two of a radiation resistance sheet 32 , a porous material 33 , a filler 33 , and a conductive resistance sheet. As a first example, the heat transfer resistor may include a radiation resistance sheet (32). The radiation resistance sheet may include a portion having a greater heat transfer resistance than the plate, and the heat transfer resistance may be a degree of resistance to heat transfer by radiation. The support may perform the function of the radiation resistance sheet together. A conductive resistance sheet to be described later may perform the function of the radiation resistance sheet together. As a second example, the heat transfer resistor may include conduction resistance sheets 60 and 63 . The conductive resistance sheet may include a portion having a higher heat transfer resistance than the plate, and the heat transfer resistance may be a degree of resistance to heat transfer by conduction. For example, the conductive resistance sheet may have a thickness smaller than at least a portion of the plate. As another example, the conductive resistance sheet may include one end and the other end, and the length of the conductive resistance sheet may be longer than a straight line distance connecting one end of the conductive resistance sheet and the other end of the conductive resistance sheet. As another example, the conductive resistance sheet may include a material having a higher resistance to heat transfer by conduction than the plate. As another example, the heat transfer resistor may include a portion having a radius of curvature smaller than that of the plate.

Referring to FIG. 4A , for example, a conductive resistance sheet may be provided on a side plate connecting the first plate and the second plate. Referring to FIG. 4B , for example, a conductive resistance sheet 60 may be provided on at least a portion of the first plate and the second plate. A connection frame 70 may be further provided outside the conductive resistance sheet. The connection frame may be a portion from which the first plate or the second plate is extended, or a portion from which the side plate is extended. Optionally, the connection frame 70 may include a part to which parts disposed outside the vacuum space part are connected, such as a part for sealing the door and the body, an exhaust port necessary for an exhaust process, and a getter port for maintaining a vacuum. can Referring to FIG. 4C , for example, a conductive resistance sheet may be provided on a side plate connecting the first plate and the second plate. The conductive resistance sheet may be installed in a through hole penetrating the vacuum space portion. The conduit 64 may be provided separately on the outside of the conductive resistance sheet. The conductive resistance sheet may be provided in a pleated shape. Through this, the heat transfer path can be lengthened, and deformation due to the pressure difference can be prevented. A separate shielding member for insulating the conductive resistance sheet 63 may also be provided. The conductive resistance sheet may include a portion having a strain resistance smaller than at least one of the plate, the radiation resistance sheet, and the support. The radiation resistance sheet may include a portion having a strain resistance smaller than that of at least one of the plate and the support. The plate may include a portion having less strain resistance than the support. The conductive resistance sheet may include a portion having a conductive heat transfer resistance greater than at least one of the plate, the radiation resistance sheet, and the support. The radiation resistance sheet may include a portion having a greater radiation heat transfer resistance than at least one of the plate, the conductive resistance sheet and the support. The support may include a portion having a greater heat transfer resistance than the plate. For example, at least one of the plate, the conductive resistance sheet, and the connection frame may include stainless steel, the radiation resistance sheet may include aluminum, and the support may include a resin material.

5 is a graph for observing the process of evacuating the inside of the vacuum insulator with time and pressure when a support is used. An example of the vacuum insulator vacuum evacuation step is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

While the exhaust step is being performed, an outgassing step, which is a process in which the gas in the vacuum space is exhausted or the potential gas remaining in the parts of the vacuum insulator, is exhausted may be performed. As an example of the outgassing step, the exhausting step includes at least one of heating or drying the vacuum insulator, providing a vacuum pressure to the vacuum insulator, and providing a getter to the vacuum insulator. may include In this case, it is possible to promote the vaporization of the potential gas remaining in the parts provided in the vacuum space portion to be exhausted. The exhausting step may include cooling the vacuum insulator. The cooling step may be performed after the step of heating or drying the vacuum insulator is performed. Preferably, the step of heating or drying the vacuum insulator and the step of providing a vacuum pressure to the vacuum insulator may be performed together. Preferably, the step of heating or drying the vacuum insulator and the step of providing a getter to the vacuum insulator may be performed together. Preferably, after the step of heating or drying the vacuum insulator is performed, the step of cooling the vacuum insulator may be performed. Preferably, the step of providing a vacuum pressure to the vacuum insulator and the step of providing a getter to the vacuum insulator may be performed so as not to overlap. For example, after the step of providing a vacuum pressure to the vacuum insulator is performed, the step of providing a getter to the vacuum insulator may be performed. When a vacuum pressure is provided to the vacuum insulator, the pressure of the vacuum space portion may drop to a certain level and then no longer drop. At this time, after stopping the step of providing a vacuum pressure to the vacuum insulator, a getter may be introduced. As an example of stopping the step of providing the vacuum pressure to the vacuum insulator, the operation of the vacuum pump connected to the vacuum space part may be stopped. When the getter is added, the step of heating or drying the vacuum insulator may be performed together. Through this, outgassing can be promoted. As another example, after the step of providing the getter to the vacuum insulator is performed, the step of providing a vacuum pressure to the vacuum insulator may be performed.

The time during which the vacuum insulator vacuum evacuation step is performed may be referred to as a vacuum evacuation time. The vacuum exhaust time includes a time period during which the step of heating or drying the vacuum insulator is performed (Δt1), a time period during which the step of maintaining the getter in the vacuum insulator is performed (Δt2), and the vacuum insulation It may include at least one time among the time (Δt3) during which the step of cooling the sieve is performed. Examples of Δt1, Δt2, and Δt3 are as follows. It may be any one of the following examples of the present invention or a combination of two or more. In the step of evacuating the vacuum insulator, Δt1 may be greater than or equal to t1a and less than or equal to t1b. As a first example, the t1a may be greater than or equal to 0.2 hr and less than or equal to 0.5 hr. The t1b may be greater than or equal to 1 hr and less than or equal to 24.0 hr. Preferably, the Δt1 may be 0.3 hr or more and 12.0 hr or less. Preferably, the Δt1 may be 0.4 hr or more and 8.0 hr or less. More preferably, the Δt1 may be 0.5 hr or more and 4.0 hr or less. In this case, even if Δt1 is kept as short as possible, outgassing can be applied to a sufficient vacuum insulator. In one example, the parts of the vacuum insulator that are exposed to the vacuum space are less than any one of the parts of the vacuum insulator that are exposed to the external space of the vacuum insulator. , %) may be included. Specifically, the part exposed to the vacuum space may include a part having a lower outgassing rate than that of a thermoplastic polymer. More specifically, a support or a radiation resistance sheet may be disposed in the vacuum space portion, and the outgassing rate of the support may be lower than that of the thermoplastic plastic. As another example, a part of the vacuum insulator that is exposed to the vacuum space has a higher operating temperature than any one of the parts of the vacuum insulator that is exposed to the external space of the vacuum space. It may be a case including a part having a ° C. In this case, the vacuum insulator can be heated to a higher temperature, thereby increasing the outgassing rate. For example, the parts exposed to the vacuum space It may include a portion having a higher operating temperature than that of a thermoplastic polymer.For more specific example, a support or a radiation-resisting sheet is disposed in the vacuum space portion, and the use temperature of the support may be higher than that of the thermoplastic plastic. As another example, among the parts of the vacuum insulator, the parts exposed to the vacuum space may include more metal parts than non-metal parts, that is, the mass of the metal part is greater than the mass of the non-metal part. The volume of the metal part may be larger than the volume of the non-metal part, or the area where the metal part is exposed to the vacuum space may be larger than the area where the non-metal part is exposed to the vacuum space. When there are a plurality of parts exposed to the space, the sum of the volume of the metallic material contained in the first part and the volume of the metallic material contained in the second part is equal to the volume of the non-metal material contained in the first part and the second It may be greater than the sum of the volumes of the non-metallic materials included in the part.If there are a plurality of parts exposed to the vacuum space, the mass of the metal material included in the first part and the metal material included in the second part It may be a case in which the sum of the mass of the first part is greater than the sum of the mass of the non-metal material included in the first part and the mass of the non-metal material included in the second part. The sum of the area where the metal material included in the first part is exposed to the vacuum space part and the area where the metal material included in the second part is exposed to the vacuum space part is the sum of the area where the metal material included in the first part is exposed to the vacuum space part. Including the area exposed to the space and the second part The non-metallic material may be larger than the sum of the areas exposed to the vacuum space. As a second example, t1a may be greater than or equal to 0.5 hr and less than or equal to 1 hr. The t1b may be greater than or equal to 24.0 hr and less than or equal to 65 hr. Preferably, the Δt1 may be greater than or equal to 1.0 hr and less than or equal to 48.0 hr. Preferably, the Δt1 may be 2 hr or more and 24.0 hr or less. More preferably, the Δt1 may be 3 hr or more and 12.0 hr or less. In this case, it may be a vacuum insulator that needs to maintain Δt1 as long as possible. In this case, it may be the case opposite to the examples described in the first example, or a case where the part exposed to the vacuum space is made of a thermoplastic material. A duplicate description will be omitted. In the step of evacuating the vacuum insulator, Δt2 may be greater than or equal to t2a and less than or equal to t2b. The t2a may be greater than or equal to 0.1 hr and less than or equal to 0.3 hr. The t2b may be greater than or equal to 1 hr and less than or equal to 5.0 hr. Preferably, the Δt2 may be 0.2 hr or more and 3.0 hr or less. More preferably, the Δt2 may be 0.3 hr or more and 2.0 hr or less. More preferably, the Δt2 may be 0.5 hr or more and 1.5 hr or less. In this case, the vacuum insulator may be sufficient for outgassing through the getter even by keeping Δt2 as short as possible. In the step of evacuating the vacuum insulator, Δt3 may be greater than or equal to t3a and less than or equal to t3b. The t3a may be greater than or equal to 0.2 hr and less than or equal to 0.8 hr. The t3b may be greater than or equal to 1 hr and less than or equal to 65.0 hr. Preferably, the Δt3 may be 0.2 hr or more and 48.0 hr or less. Preferably, the Δt3 may be 0.3 hr or more and 24.0 hr or less. More preferably, the Δt3 may be 0.4 hr or more and 12.0 hr or less. More preferably, the Δt3 may be 0.5 hr or more and 5.0 hr or less. After the heating or drying step of the exhaust step is performed, the cooling step may be performed. For example, when the heating or drying step is performed for a long time, Δt3 may be long. The vacuum insulator of the present invention may be manufactured such that Δt1 is greater than Δt2, Δt1 is less than or equal to Δt3, or Δt3 is greater than Δt2. Preferably, Δt2<Δt1≤Δt3. The vacuum insulator of the present invention has Δt1+Δt2+Δt3 greater than or equal to 0.3 hr, less than or equal to 70 hr, greater than or equal to 1 hr, less than or equal to 65 hr, greater than or equal to 2 hr, or same, and may be manufactured to be less than or equal to 24hr. More preferably, Δt1+Δt2+Δt3 may be manufactured to be greater than or equal to 3 hr and less than or equal to 6 hr.

An example of the vacuum pressure condition during the exhaust step is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The minimum value of the vacuum pressure in the vacuum space during the exhaust step may be greater than 1.8E-6 Torr. Preferably, the lowest value of the vacuum pressure is greater than 1.8E-6 Torr, less than or equal to 1.0E-4 Torr, greater than 0.5E-6 Torr, less than or equal to 1.0E-4 Torr, or 0.5E- greater than 6 Torr, and may be less than or equal to 0.5E-5 Torr. More preferably, the minimum value of the vacuum pressure may be greater than 0.5E-6 Torr and less than 1.0E-5 Torr. As described above, the reason for limiting the minimum value of the vacuum pressure provided during the exhausting step is that even when the pressure is reduced with a vacuum pump during the exhausting step, the degree of the vacuum pressure dropping below a certain level is slowed down. As an embodiment, after the evacuation step is performed, the vacuum pressure of the vacuum space may be maintained at a pressure greater than or equal to 1.0E-5 Torr and less than or equal to 5.0E-1 Torr. The vacuum pressure maintained is greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-1 Torr, greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-2 Torr, or 1.0E greater than or equal to -4 Torr, less than or equal to 1.0E-2 Torr, greater than or equal to 1.0E-5 Torr, less than or equal to 1.0E-3 Torr, greater than or equal to 1.0E-4 Torr; The pressure may be less than or equal to 1.0E-3 Torr. As a result of predicting the change of the vacuum pressure in the vacuum insulator of the example, it was confirmed that the vacuum pressure was maintained below 1.0E-04Torr even after 16.3 years, and the other was 17.8 years. It was confirmed that the vacuum pressure was maintained at 1.0E-04Torr or less even in Yiru. As such, the vacuum pressure of the vacuum insulator must be maintained at a predetermined level or less, even if there is a change over time, to be used industrially.

5A is a graph of the elapsed time and pressure of an exhaust process according to an example, and FIG. 5B is an accelerated experiment of a vacuum insulator of a refrigerator having an internal volume of 128 liters to explain the results of a long-term vacuum maintenance experiment. Referring to FIG. 5B , it can be seen that the vacuum pressure is gradually increased according to the aging. For example, it was confirmed that 6.7E-04 Torr after 4.7 years, 1.7E-03 Torr after 10 years, and 1.0E-02 Torr after 59 years. According to these experimental results, it can be confirmed that the vacuum insulator according to the embodiment is sufficiently industrially applicable.

6 is a graph comparing vacuum pressure and gas conductivity. Referring to FIG. 6 , the actual heat transfer coefficient (eK) of gas conductivity according to vacuum pressure according to the size of the gap inside the vacuum space part 50 is shown as a graph. The gap of the vacuum space part was measured in three cases of 3 mm, 4.5 mm, and 9 mm. The gap of the vacuum space is defined as follows. When the radiation resistance sheet 32 is located inside the vacuum space, it is a distance between the radiation resistance sheet and an adjacent plate, and when there is no radiation resistance sheet inside the vacuum space, the first plate and the second plate is the distance between the plates. It can be seen that the point corresponding to the conventional real heat transfer coefficient 0.0196 W/mk for providing an insulating material by foaming polyurethane is 5.0E-1 Torr even when the size of the gap is 3 mm because the size of the gap is small. On the other hand, even if the vacuum pressure is lowered, it was confirmed that the point at which the reduction effect of the insulation effect due to the gas conduction heat is saturated is approximately 4.5E-3Torr. The pressure of 4.5E-3Torr can be determined as the point at which the reduction effect of gas conduction heat is saturated. In addition, when the real heat transfer coefficient is 0.01W/mk, it is 1.2E-2Torr. An example of the range of vacuum pressure in the vacuum space according to the gap is as follows. The support includes at least one of a bar, a connecting plate, and a support plate, and when the gap of the vacuum space is greater than or equal to 3 mm, the vacuum pressure is greater than or equal to A and less than 5E-1 Torr, or 2.65E It may be greater than -1 Torr and less than 5E-1 Torr. As another example, the support includes at least one of a bar, a connecting plate, and a support plate, and when the gap of the vacuum space is greater than or equal to 4.5 mm, the vacuum pressure is greater than or equal to A and less than 3E-1 Torr or greater than 1.2E-2 Torr and less than 5E-1 Torr. As another example, when the support includes at least one of a bar, a connecting plate, and a support plate, and the gap of the vacuum space is greater than or equal to 9 mm, the vacuum pressure is greater than or equal to A and 1.0×10^-1 It may be less than Torr, greater than 4.5E-3 Torr, and less than 5E-1 Torr, where A may be greater than or equal to 1.0×10^-6 Torr and less than or equal to 1.0E-5 Torr. Preferably, A may be greater than or equal to 1.0×10^-5 Torr and less than or equal to 1.0E-4 Torr. When the support includes a porous material or a filler, the vacuum pressure may be greater than or equal to 4.7E-2 Torr and less than or equal to 5E-1 Torr. In this case, it may be understood that the size of the gap ranges from several micrometers to several hundreds of micrometers. When the support and the porous material are provided together in the vacuum space part, a vacuum pressure intermediate between the case of using only the support and the case of using only the porous material may be used.

7 is a view showing various embodiments of the vacuum space unit. The present invention may be any one of the following examples, or an example in which two or more are combined.

Referring to FIG. 7 , the vacuum insulator of the present invention may include a vacuum space part. The vacuum space part 50 may include a first vacuum space part extending in a first direction (eg, X-axis) and having a predetermined height. The vacuum space part 50 may selectively include a second vacuum space part (hereinafter, vacuum space expansion part) different from the first vacuum space part in at least one of a height and a direction. The vacuum space extension portion may be provided by extending at least one of the first and second plates and the side plate. In this case, the heat transfer resistance can be increased by lengthening the heat conduction path along the plate. The vacuum space extension in which the second plate extends may reinforce the thermal insulation performance of a front portion of the vacuum insulator, and the vacuum space extension in which the first plate extends may be a rear portion of the vacuum insulator. It is possible to reinforce the thermal insulation performance of the side plate, the extended vacuum space extension portion can reinforce the thermal insulation performance of the side portion (side portion) of the vacuum insulator. Referring to FIG. 7A , the second plate may extend to provide the vacuum space extension part 51 . The second plate may include the vacuum space portion 50 and the second portion 202 extending from the first portion 201 forming the vacuum space extension portion 51 . The second portion 202 of the second plate may branch a heat conduction path along the second plate, thereby increasing heat transfer resistance. Referring to FIG. 7B , the side plate may extend to provide the vacuum space extension part. The side plate may include the vacuum space part 50 and the second part 152 extending from the first part 151 forming the vacuum space extension part 51 . The second portion of the side plate may branch a heat conduction path along the side plate, thereby improving thermal insulation performance. all. The first and second portions 151 and 152 of the side plate may branch a heat conduction path to increase heat transfer resistance. Referring to FIG. 7C , the first plate may extend to provide the vacuum space extension part. The first plate may include a second portion 102 extending from the first portion 101 forming the vacuum space portion 50 and the vacuum space extension portion 51 . The second part may branch the heat conduction path along the second plate, thereby increasing the heat transfer resistance. Referring to FIG. 7D , the vacuum space extension part 51 may include an X-direction extension part 51a and a Y-direction extension part 51b of the vacuum space part. The vacuum space extension part 51 may extend in a plurality of directions of the vacuum space part 50 . Through this, it is possible to reinforce the thermal insulation performance in a plurality of directions, and by lengthening the heat conduction path in a plurality of directions, it is possible to increase the heat transfer resistance. The vacuum space expansion unit extending in the plurality of directions may further improve thermal insulation performance by branching the heat conduction path. Referring to FIG. 7E , the side plate may provide the vacuum space extension unit extending in a plurality of directions. The vacuum space expansion part may reinforce the insulating performance of the side part of the vacuum insulator. Referring to FIG. 7F , the first plate may provide the vacuum space extension unit extending in a plurality of directions. The vacuum space expansion part may reinforce the insulating performance of the side part of the vacuum insulator.

8 is a view for explaining an additional insulator. The present invention may be any one of the following examples, or an example in which two or more are combined. Referring to FIG. 8 , the vacuum insulator of the present invention may optionally include an additional insulator 90 . The additional insulator may be an object having a lower degree of vacuum than the vacuum insulator or may be an object that does not include a part in a vacuum state therein. The vacuum insulator and the additional vacuum insulator may be directly connected or connected through a medium . In this case, the medium may be an object having a lower degree of vacuum than at least one of the vacuum insulator and the additional insulator, or an object that does not include a part in a vacuum state therein. When the vacuum insulator includes a portion in which the height of the vacuum insulator is high and a portion in which the height of the vacuum insulator is low, the additional insulator may be disposed in a portion in which the height of the vacuum insulator is low. The additional insulator may include a portion connected to at least a portion of the first and second plates and the side plate. The additional insulator may be supported on the plate, coupled or sealed. A degree of sealing between the additional insulator and the plate may be lower than a degree of sealing between the plates. The additional heat insulator may include a cured heat insulator (eg, PU foam) that is cured after being injected, a pre-molded resin, a peripheral heat insulator, and a side panel. At least a portion of the plate may be provided to be located inside the additional insulator. The additional insulator may include an empty space. The plate may be provided to be accommodated in the empty space. At least a portion of the plate may be provided to cover at least a portion of the additional heat insulator. The additional insulator may include a member covering the outer surface thereof. The member may be at least a part of the plate. The additional insulator may be a medium for connecting, supporting, bonding, or sealing the vacuum insulator and the component. The additional insulator may be a medium for connecting, supporting, bonding, or sealing the vacuum insulator to another vacuum insulator. The additional heat insulator may include a portion connected to a fastening part provided on at least a portion of the plate. The additional insulator may include a portion connected to a cover covering the additional insulator. The cover may be disposed between the first plate and the first space, between the second plate and the second space, or between the side plate and a space other than the vacuum space part 50 . can For example, the cover may include a part on which the component is mounted. As another example, the cover may include a portion forming an exterior of the additional heat insulator. Referring to FIGS. 8A to 8F , the additional thermal insulator may include a peripheral thermal insulator. The peripheral insulator may be disposed on at least a portion of a periphery of the vacuum insulator, a periphery of the first plate, a periphery of the second plate, and the side plate. The peripheral insulator disposed on the periphery of the first plate or the second plate may extend to the portion where the side plate is formed or to the outside of the side plate. The peripheral insulator disposed on the side plate may extend to a portion where the first plate or the second plate is formed, or may extend to an outer side of the first plate or the second plate. 8G to 8H , the additional insulator may include a central thermal insulator. The central thermal insulator includes at least a portion of a central portion of the vacuum insulator, a central portion of the first plate, and a central portion of the second plate. can be placed in

Referring to FIG. 8A , the perimeter insulation 92 may be placed on the periphery of the first plate. The perimeter insulation may contact the first plate. The peripheral insulator may be separated from the first plate or may extend further (indicated by a dotted line). The peripheral insulation may improve the thermal insulation performance of the peripheral portion of the first plate. Referring to FIG. 8B , the perimeter insulation may be disposed on the periphery of the second plate. The perimeter insulation may contact the second plate. The peripheral insulator may be separated from the second plate or may extend further (indicated by a dotted line). The peripheral insulation may improve the thermal insulation performance of the peripheral portion of the second plate. Referring to FIG. 8C , the perimeter insulation may be disposed on the periphery of the side plate. The perimeter insulation may contact the side plate. The peripheral insulation may be separated from the side plate or may extend further. The peripheral portion insulator may improve the thermal insulation performance of the peripheral portion of the side plate. Referring to FIG. 8D , the peripheral insulation 92 may be placed on the peripheral portion of the first plate. The peripheral insulator may be placed on the periphery of the first plate constituting the vacuum space expansion part 51 . The peripheral insulator may be in contact with the first plate formed by the vacuum space extension. The peripheral insulator may be separated from the first plate constituting the vacuum space extension or may further extend. The peripheral part insulator may improve the thermal insulation performance of the peripheral part of the first plate constituting the vacuum space expansion part. Referring to FIGS. 8E and 8F , in the peripheral insulator, the vacuum space extension may be disposed on a peripheral portion of the second plate or the side plate. The same explanation as in FIG. 8D may be applied. Referring to FIG. 8G , the central insulator 91 may be placed in the central portion of the first plate. The central part insulator may improve the thermal insulation performance of the central part of the first plate. Referring to FIG. 8H , the central insulator may be disposed on the central portion of the second plate. The central part insulator may improve the thermal insulation performance of the central part of the second plate.

9 is a view for explaining a heat transfer path between first and second plates having different temperatures. An example of the heat transfer path is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

The heat transfer path may pass through a portion extending from at least a portion of the first portion 101 of the first plate, the first portion 201 of the second plate, and the first portion 151 of the side plate. there is. The first part may include a part forming the vacuum space part. The extended portions 102 , 152 , and 202 may include portions extending in a direction away from the first portion. The extended portion may include a side portion of the vacuum insulator or a portion extending toward a side portion of a plate having a higher temperature among the first and second plates or a side portion of the vacuum space portion 50 . . The extended portion is a portion extending in a direction away from the front portion of the vacuum insulator or the front portion of the plate having a higher temperature among the first and second plates or the front portion of the vacuum space portion 50 . may include Through this, it is possible to reduce the generation of dew on the front part. The vacuum insulator or the vacuum space unit 50 may include first and second surfaces having different temperatures from each other. The temperature of the first surface may be lower than that of the second surface. For example, the first surface may be the first plate, and the second surface may be the second plate. The extended portion may include a portion extending in a direction away from the second surface or extending toward the first surface. The extended portion may include a portion in contact with the second surface or a portion extending in contact with the second surface. The extended portion may include a portion extending to be spaced apart from the two surfaces. The extended portion may include a portion having greater heat transfer resistance than at least a portion of the plate or greater than that of the first surface. The extended portion may include a plurality of portions extending in different directions. For example, the extended portion may include a second portion 202 of the second plate and a third portion 203 of the second plate. A third portion may also be provided on the first plate or the side plate. Through this, it is possible to increase the heat transfer resistance by lengthening the heat transfer path. In the extended portion, the above-described heat transfer resistor may be disposed. An additional thermal insulator may be disposed outside the extended portion. Through this, the extended portion can reduce the occurrence of dew on the second surface. Referring to FIG. 9A , the second plate may include the extended portion extending to the periphery of the second plate. Here, the extended portion may further include extending rearward. Referring to FIG. 9B , the side plate may include the extended portion extending to a peripheral portion of the side plate. Here, the extended portion may be provided to be shorter or the same length as the extended portion of the second plate. Here, the extended portion may further include a rearwardly extending portion. Referring to FIG. 9C , the first plate may include the extended portion extending to a periphery of the first plate. Here, the extended portion may be shorter than or extend the same length as the extended portion of the second plate. Here, the extended portion may further include a rearwardly extending portion.

10 is a view for explaining a branch on a heat transfer path between first and second plates having different temperatures. An example of the branching portion is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined.

Optionally, the heat transfer path may pass through portions 205 , 153 , and 104 branching from at least some of the first plate, the second plate, and the side plate. Here, the branched heat transfer path means a heat transfer path that flows separately from the heat transfer path flowing along the plate and in a different direction. The branched portion may be formed in a direction away from the vacuum space portion 50 . The branched portion may be formed in a direction toward the inside of the vacuum space 50 . The branched part may perform the same function as the extended part described with reference to FIG. 9 , so a description of the same part will be omitted. Referring to FIG. 10A , the second plate may include the branched portion 205 . A plurality of the branched portions may be provided to be spaced apart from each other. The branched portion may include a third portion 203 of the second plate. Referring to FIG. 10B , the side plate may include the branched portion 153 . The branched portion 153 may branch from the second portion 152 of the side plate. At least two of the branched portions 153 may be provided. At least two branched portions 153 spaced apart from each other may be provided in the second portion 152 of the side plate. Referring to FIG. 10C , the first plate may include the branched portion 104 . The branched portion may further extend from the second portion 102 of the first plate. The branched portion may extend toward the periphery. The branched portion 104 may be bent to further extend. A direction in which the branched portion extends in FIGS. 10A, B, and C may be the same as at least one of the extending directions of the extended portion described in FIG. 10 .

11 is a view for explaining a manufacturing process of the vacuum insulator.

Optionally, the vacuum insulator may be manufactured by a vacuum insulator component preparation step in which the first plate and the second plate are prepared in advance. Optionally, the vacuum insulator may be manufactured by a vacuum insulator component assembly step in which the first plate and the second plate are assembled. Optionally, the vacuum insulator may be manufactured by evacuating a vacuum insulator in which the gas in the space formed between the first plate and the second plate is discharged. Optionally, after the vacuum insulator component preparation step is performed, the vacuum insulator component assembly step may be performed or the vacuum insulator evacuation step may be performed. Optionally, after the vacuum insulator component assembly step is performed, the vacuum insulator vacuum evacuation step may be performed. Optionally, the vacuum insulator may be manufactured by the vacuum insulator component sealing step (S3) in which the space between the first plate and the second plate is sealed. The vacuum insulator component sealing step may be performed before the vacuum insulator vacuum evacuation step (S4). The vacuum insulator may be manufactured as an object having a predetermined purpose by the device assembling step (S5) in which the vacuum insulator is combined with the components constituting the device. The device assembling step may be performed after the vacuum insulator evacuation step. Here, the components constituting the device mean the components constituting the device together with the vacuum insulator.

The vacuum insulator component preparation step (S1) is a step in which parts constituting the vacuum insulator are prepared or manufactured. Examples of the parts constituting the vacuum insulator may include various parts such as a plate, a support, a heat transfer resistor, and a tube. The vacuum insulator component assembly step (S2) is a step in which the prepared components are assembled. The vacuum insulator component assembling step may include disposing at least a portion of the support and the heat transfer resistor on at least a portion of the plate. For example, the step of assembling the vacuum insulator component may include disposing at least a portion of the support and the heat transfer resistor between the first plate and the second plate. Optionally, the step of assembling the vacuum insulator component may include disposing a penetrating component on at least a portion of the plate. For example, the step of assembling the vacuum insulator component may include disposing a penetrating component or a surface component between the first and second plates. After the penetrating part is disposed between the first plate and the second plate, the penetrating part may be connected or sealed to the penetrating part fastening portion.

An example of the vacuum insulator vacuum evacuation step is as follows. The present invention may be any one of the following examples or an example in which two or more are combined. The vacuum insulator evacuation step may include at least one of a step in which the vacuum insulator is put into the exhaust passage, a getter activation step, a vacuum leak check step, and an exhaust port closing step. The step of forming the fastening part may be performed in at least one of the vacuum insulator component preparation step, the vacuum insulator component assembly step, and the device assembly step. Before the vacuum insulator evacuation step is performed, a step of washing parts constituting the vacuum insulator may be performed. Optionally, the washing step may include applying ultrasonic waves to the parts constituting the vacuum insulator or providing ethanol or a material containing ethanol to the surface of the parts constituting the vacuum insulator. can The ultrasonic wave may have an intensity between 10 kHz and 50 kHz. The content of ethanol in the material may be 50% or more. For example, the content of ethanol in the material may be 50% to 90% or less. As another example, the content of ethanol in the material may be 60% to 80% or less. As another example, the content of ethanol in the material may be 65% to 75% or less. Optionally, after the washing step is performed, a step of drying the parts constituting the vacuum insulator may be performed. Optionally, after the washing step is performed, a step of heating the components constituting the vacuum insulator may be performed.

By way of example, an example of a process with respect to a plate is as follows. It may be any one of the following examples of the present invention or a combination of two or more. The vacuum insulator component preparation step may include manufacturing the plate. Before the vacuum insulator evacuation step is performed, the step of manufacturing the plate may be performed. Optionally, the plate may be made of sheet metal. For example, thin and wide plates can be fabricated using plastic deformation. Optionally, the manufacturing step may include forming the plate. The forming step may be applied to the forming of the side plate, or the forming step may be applied in the process of integrally manufacturing the side plate with at least a portion of the first plate and the second plate. For example, the forming may include drawing. The forming step may include a step in which the plate is partially seated on the support. The forming step may include a step of partially applying a force to the plate. The forming step may include a step in which a part of the plate is seated on a support and a force is applied to the other part of the plate. The forming step may include deforming the plate. The deforming step may include forming at least one curved part on the plate. The deforming step may include changing the radius of curvature of the plate, or the deforming step may include changing the thickness of the plate. As a first example, the step of changing the thickness may include increasing the thickness of a portion of the plate, and the portion may include a portion extending in the longitudinal direction of the inner space (first straight portion). The part may be provided in the vicinity of the part where the plate is seated on the support in the step of forming the plate. As a second example, the step of changing the thickness may include a step of reducing the thickness of a portion of the plate, and the portion may include a portion extending in the longitudinal direction of the inner space (second straight portion). The portion may be provided in the vicinity of a portion to which a force is applied to the plate in the step of forming the plate. As a third example, the step of changing the thickness may include a step of reducing the thickness of a portion of the plate, and the portion may include a portion extending in the height direction of the inner space (second straight portion). The portion may be connected to a portion extending in the longitudinal direction of the inner space of the plate. As a fourth example, the step of changing the thickness includes increasing the thickness of a portion of the plate, wherein the portion is a portion in which the side plate extends in the longitudinal direction of the inner space and in the height direction of the inner space It may include a curved portion provided between the portions (first curved portion). The curved portion may be provided in the vicinity of a portion or a portion on which the plate is seated on the support in the step of forming the plate. As a fifth example, the step of changing the thickness includes reducing the thickness of a portion of the plate, and the portion extends in the height direction of the portion and the portion in which the side plate extends in the longitudinal direction of the inner space and the inner space It may include a curved portion provided between the portions (second curved portion). The curved portion may be provided in the vicinity of a portion to which a force is applied to the plate in the step of forming the plate. The transforming step may be any one of the above-described examples or an example in which at least two of the above-described examples are combined.

With respect to the plate, the process may optionally include washing the plate. An example of a process sequence related to the step of washing the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. Before the vacuum insulator evacuation step is performed, a step of washing the plate may be performed. After the step of manufacturing the plate is performed, at least one of the step of forming the plate and the step of washing the plate may be performed. After the step of forming the plate is performed, the step of washing the plate may be performed. Before the step of forming the plate is performed, a step of washing the plate may be performed. After the step of manufacturing the plate is performed, at least one of a step of providing the fastening part of the part to a part of the plate and a step of washing the plate may be performed. After the step of providing the part fastening part to a part of the plate is performed, the step of washing the plate may be performed.

With respect to the plate, the process may optionally include providing the plate with fasteners. An example of the process sequence related to the step of providing the fastening part to the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. Before the vacuum insulator evacuation step is performed, a step of providing the part fastening part to a part of the plate may be performed. For example, the step of providing the fastening part may include the step of manufacturing the pipe provided to the part fastening part. The tube may be connected to a portion of the plate. The tube may be disposed in an empty space provided on the plates or an empty space provided between the plates. As another example, the step of providing the fastening part may include providing a through hole in a portion of the plate. As another example, the step of providing the fastening part may include providing a curved part on at least one of the plate and the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The process with respect to the plate may optionally include a process for sealing the vacuum insulator component associated with the plate. An example of the process sequence related to the step of sealing the vacuum insulator component related to the plate is as follows. The present invention may be any one of the following examples, or a combination of two or more. After the step of providing a through hole in a portion of the plate is performed, at least one of providing a curved portion to at least a portion of the plate and the tube and providing a sealing portion between the plate and the tube may be performed there is. After the step of providing the curved portion to at least one of the plate and the tube is performed, sealing between the plate and the tube may be performed. The step of providing a through hole in a part of the plate and the step of providing a curved part in at least a part of the plate and the tube may be performed simultaneously. The step of providing a through hole in a part of the plate and the step of providing a seal between the plate and the tube may be performed simultaneously. After the step of providing a curved portion to the tube is performed, a step of providing a through hole in a portion of the plate may be performed. Before the vacuum insulator evacuation step is performed, a part of the tube may be provided or sealed to the plate, and after the vacuum insulator evacuation step is performed, another part of the tube may be sealed. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

When at least a part of the plate is used integrally with the heat transfer resistor, the example of the process related to the plate may also be applied to the example of the process of the heat transfer resistor.

Optionally, the vacuum insulator may include a side plate connecting the first plate and the second plate. Examples of the side plate are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The side plate may be provided integrally with at least one of the first and second plates. The side plate may be provided integrally with any one of the first and second plates. The side plate may be provided as any one of the first and second plates. The side plate may be provided as a part of any one of the first and second plates. The side plate may be provided as a separate part from the other one of the first and second plates. In this case, optionally, the side plate may be provided to be coupled or sealed with the other one of the first and second plates. The side plate may include a portion having a greater degree of strain resistance than at least a portion of the other one of the first and second plates. The side plate may include a portion having a greater thickness than at least a portion of the other one of the first and second plates. The side plate may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates.

In a similar example to this, optionally, the vacuum insulator is provided to reduce the amount of heat transfer between the first space provided in the vicinity of the first plate and the second space provided in the vicinity of the second plate. may include Examples of the heat transfer resistor are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The heat transfer resistor may be provided integrally with at least one of the first and second plates. The heat transfer resistor may be provided integrally with any one of the first and second plates. The heat transfer resistor may be provided as any one of the first and second plates. The heat transfer resistor may be provided as a part of any one of the first and second plates. The heat transfer resistor may be provided as a separate component from the other one of the first and second plates. In this case, optionally, the heat transfer resistor may be provided to be coupled to or sealed with the other one of the first and second plates. The heat transfer resistor may include a portion having a higher heat transfer resistance than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller thickness than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates. The heat transfer resistor may include a portion having a smaller radius of curvature than at least a portion of the other one of the first and second plates.

The contents described in FIGS. 1 to 11 may be applied to all or selectively applied to the embodiments shown in the drawings below.

The installation of the tube will be schematically described.

12 is a perspective view in which a tube is installed in a vacuum insulator, (a) is before the tube is fastened, and (b) is a view after the tube is fastened.

Referring to FIG. 12 , a vacuum insulator according to one or more embodiments may have a tube 40 . The pipe 40 may be a pipe for exhausting the fluid of the vacuum space unit 50 . The tube 40 may be a tube for a getter in which a getter for gas adsorption is supported. The tube 40 may serve as an exhaust port and a getter port.

Optionally, a thickness of the tube may be provided to be greater than that of the first plate 10 . The thickness of the tube may be provided to be thicker than that of the second plate 20 . The thickness of the tube may provide a thickness sufficient to withstand the compression required for sealing the tube. The sealing may be performed by pinch-off. The tube may have a sufficient flesh thickness. Since the tube is a soft material, it is necessary to increase the flesh thickness. If the flesh thickness is small, it may be torn at the time of sealing or may cause vacuum breakage. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the tube may be provided as a hollow tube with a round or oval shape of metal. The tube may be sealed after evacuation or after inserting the getter. The tube may be sealed by pressure welding. The tube may be sealed by deforming the tube. The tube may be sealed by pinching off. The tube may be made of copper (CU) for easy deformation. For the tube, copper having a lower strength than stainless steel may be used. By using easily deformable copper, the pinch-off process can be smoothly performed and the sealing part can be reliably provided. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the tube 40 can be inserted into the first plate 10 . At least a portion of the tube 40 may be inserted into the vacuum space 50 . At least a portion of the tube 40 may be in contact with the first plate 10 . The tube 40 may be provided in the periphery of the vacuum insulator. A through hole 41 for inserting the tube may be formed in the first plate 10 . A flange 42 to which the pipe 40 can be fastened may be machined in the peripheral portion of the through hole 41 . The flange 42 may be provided integrally with the first plate 10 . The flange 42 may be formed by a burr of the through hole 41 . The through hole 41 may have the same shape as the outer shape of the tube 40 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the flange 42 may have a predetermined height portion HL extending in the height direction of the vacuum space portion. The curved portion guides the tube 40 so that the tube can be conveniently inserted into the through hole 41 . At least a portion of the height portion may provide a contact portion with the tube 40 . At least a portion of the tube 40 may be in contact with and fastened to the height portion. The tube 40 may be guided to the flange 42 to extend in the height direction of the vacuum space portion 50 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

13 is a view for explaining a method of processing the through hole of the first plate.

Referring to FIG. 13 , a hole is machined in the first plate 10 ( S1 ). Thereafter, the hole may be pressed using a pressing tool having a larger diameter than the hole ( S2 ).

Optionally, the size of the hole may be smaller than the diameter of the through hole 41 . When the through hole 41 is circular, the hole may be provided in a circular shape. The diameter of the piercing tool for processing the hole may be made smaller than the outer diameter of the tube 40 by 3 mm or less. The height of the flange 42 may be formed to be 3 mm or less. The pressing tool and the hole may have the same geometric center, and a pressing process may be performed. The pressing tool may use the same diameter as the outer diameter of the tube (40). The pressing process may be a burring process. A burr may be provided in the burring process. In the pressing process, the peripheral portion of the hole may be stretched by a predetermined length to form the flange 42 . The burr 402 may provide the flange 42 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, in order to smoothly form the flange 42 in the burring process, the following method may be applied. It can provide a small force compared to the force applied in the general burring process. The force can be applied gradually for a longer time than the time required for the general burring process. Between the piercing process and the burring process, a curvature may be processed primarily in the periphery of the hole provided by the piercing process. During the burring process, a support having a groove corresponding to a desired shape of the burr may be provided on a surface on which the burr is generated. Through the above process, it is possible to provide the flange 42 having a small radius of curvature (R). A portion where the radius of curvature is formed may be referred to as a curvature portion.

14 is a cross-sectional view taken along line 1-1' of FIG. 12(b). For reference, FIG. 14 shows a state in which the vacuum insulator is applied to the door. A cross-section of the tube and its related configuration will be described with reference to FIG. 14 .

In one or more embodiments, the first plate 10 may have a thickness of at least 0.1 mm or more. Through this, it is possible to secure rigidity to obtain process stability when inserting the tube 40 . Preferably, the thickness of the first plate 10 may be 0.1mm. The second plate 20 may be provided with a thickness of 0.5 mm or more. The thin first plate 10 is preferably provided because the conductive heat decreases. If the first plate 10 is thin, there is a disadvantage that it is vulnerable to deformation. When the tube 40 is inserted into the through hole 41 , the first plate 10 around the through hole 41 may be deformed. In this case, there is a high possibility that the first plate 10 comes into contact with the heat transfer resistor 32 to cause heat loss. An example of the heat transfer resistor described with reference to FIG. 14 may be a radiation resistance sheet. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Preferably, the height H1 of the flange 42 may be provided to be 1 mm or more and 3 mm or less. When the height of the flange 42 exceeds 3 mm, there is a high risk that the radiation resistance sheet 32 and the flange 42 come into contact. If the height of the flange 42 exceeds 3 mm, the first plate 10 is torn during the pressing process, there is a high risk that the flange is torn. If there is a machining error of the flange, these problems may be more serious. If the height of the flange is less than 1 mm, the contact surface is small when brazing the tube and the flange, so that there is a high possibility of vacuum leakage. If the height of the flange is less than 1 mm, the coupling strength between the pipe and the flange is weakened and there is a high possibility that the coupling part is damaged. A filler metal may be injected into the contact surface. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the radius of curvature R of the curvature portion of the flange 42 forming the through hole 41 may be smaller than the radius of curvature of all curved portions formed in the first plate 10 . The radius of curvature R of the flange 42 forming the through hole 41 may be smaller than the radius of curvature of all curved portions formed in the second plate 20 . The radius of curvature R of the flange 42 forming the through hole 41 may be smaller than the radius of curvature of all curved portions formed in the side plate 15 . By reducing the radius of curvature of the flange 42 , the length of the height portion HL of the flange 42 can be increased. The height portion HL of the flange 42 may be a portion where the pipe 40 and the flange 42 are joined by brazing. By increasing the length of the height portion HL of the flange 42 , it is possible to secure a large contact area between the tube 40 and the flange 42 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the tube may be insulated with the additional insulation 90 . The additional heat insulator 90 may insulate the gap between the tube 40 and the first space and the gap between the tube 40 and the second space. The tube 40 may not have access to the plate containing the additional insulation 90 . The tube 40 has a higher thermal insulation performance as it is spaced apart from the plate. This is because the tube 40 is made of copper having high thermal conductivity. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Meanwhile, deformation of the sealing portion of the tube 40 may propagate along the tube 40 to the junction of the tube 40 and the flange 42 . In this case, the joint may be damaged. Since the joint portion has the first plate 10 having weak rigidity as one joint surface, there is a greater risk of damage to the joint portion. By providing an optimal length of the tube 40 , it is possible to reduce insulation loss through the tube 40 . By providing an optimal length of the tube 40, it is possible to prevent breakage of the joint. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the height H2 of the tube 40 protruding from the first plate 10 may be at least twice the diameter of the tube 40 . In this case, the deformation of the seal of the tube 40 is not transmitted to the joint. In this case, even when the sealing portion is formed, the tube 40 may maintain its original shape at the joint portion. When the tube 40 is not circular, it may mean more than twice the average diameter of the tube 40 . Here, the average diameter may mean an average distance from the geometric center of the cross-section of the tube to the edge of the cross-section of the tube. The tube 40 may extend obliquely in the height direction of the vacuum space 50 . In this case, it is preferable that the distance from the sealing part of the tube to the point closest to the first plate 10 is at least twice the diameter of the tube 40 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the end of the tube 40 protruding from the first plate 10 may not come into contact with the outer surface or boundary of the additional insulator 90 . The tube 40 may extend in the height direction of the vacuum state. In this case, the tube 40 and the gasket 80 may be vertically aligned. A heat conduction path is generated between the end of the tube 40 and the adjacent portion of the gasket 80 , so that thermal insulation loss may increase. It is preferable that the distance H3 from the end of the tube 40 to the boundary of the additional insulator 90 is 20 mm or less. The height H2 of the tube 40 protruding from the first plate 10 is preferably greater than the distance H3 from the end of the tube 40 to the boundary of the additional insulator 90 . . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the sum of the height H2 of the tube 40 protruding from the first plate 10 and the distance H3 from the end of the tube 40 to the boundary of the additional insulator 90 . Silver, may be provided larger than the height of the vacuum space (50). The vacuum space 50 may be provided to be 10 mm or more and 20 mm or less. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the flange 42 may face the vacuum space portion 50 . Through this, the flange 42 may guide the insertion of the tube 40 . Through this, the operator can conveniently insert the tube (40). In another embodiment, the flange 42 may be directed to the outside of the vacuum space portion 50 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

15 shows an embodiment in which the flange extends toward the outside of the vacuum space portion. In one or more other embodiments, the flange 42 may extend outwardly of the vacuum space 50 . The flange 42 may extend toward the first space.

Optionally, the end of the flange 42 may not be in contact with the heat transfer resistor 32 . The heat transfer resistor can be freely installed in the vacuum space 50 without interference of the flange 42 . The heat transfer resistor 32 may be installed adjacent to or in contact with the first plate 10 . The support 30 can be installed without interference of the flange 42 . Interference, contact, and adjacency between the respective heat transfer resistors 32 , 33 , 60 , and 63 placed inside the vacuum space 50 and the flange 42 can be prevented. Accordingly, the degree of freedom in design can be increased and heat conduction can be reduced. Here, the interference may mean that the product design is difficult because the regions of the parts overlap during design. The contact may mean that the parts come into contact with each other and the thermal insulation loss increases rapidly. The adjacency may refer to the intervening of an additional insulating material due to the occurrence of thermal insulation loss due to adjacent parts.

According to the present invention, the vacuum insulator provides a first plate 10 having a first temperature, a second plate 20 having a second temperature different from the first temperature, and a vacuum space portion 50. It may include a sealing part sealing the first plate 10 and the second plate 20 . Optionally, the vacuum insulator is a vacuum insulator part preparation step in which the first plate 10 and the second plate 20 are prepared in advance, the prepared first plate 10 and the second plate 20 The vacuum insulator component assembly step in which is assembled and the vacuum insulator vacuum exhaust step in which the gas in the space formed between the first plate 10 and the second plate 20 is discharged after the component assembly step. can Optionally, before the vacuum insulator evacuation step, the space between the first plate 10 and the second plate 20 may be manufactured by a vacuum insulator component sealing step in which the space is sealed. Optionally, the step of sealing the vacuum insulator component may include an oxidation reduction step of reducing oxidation of the sealing portion or the surrounding area of the sealing portion. Optionally, after the vacuum insulator evacuation step, a device assembly step in which the vacuum insulator and the components constituting the device are coupled may be performed.

The vacuum insulator component sealing step may include a sealing step in which the sealing part is sealed. An example of the vacuum insulator component sealing step is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The step of sealing the vacuum insulator component may include providing a filler metal 403 to the sealing part. The step of sealing the vacuum insulator component may include performing sealing in a state in which a filler metal is provided to the sealing unit. The step of sealing the vacuum insulator component may include applying heat to the sealing part. The step of sealing the vacuum insulator component may include an oxidation reduction step of reducing oxidation of the sealing portion or the surrounding area of the sealing portion. Examples related to the oxidation reduction step are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The step of reducing oxidation of the vacuum insulator may include the step of providing an inert gas to the sealing part or around the sealing part. The step of reducing oxidation of the vacuum insulator may include providing a state lower than atmospheric pressure to the sealing part or the vicinity of the sealing part. The step of reducing oxidation of the vacuum insulator may include cooling the sealing part or the surrounding of the sealing part. The step of reducing oxidation of the vacuum insulator may include performing sealing in two or more sealing units. For example, the two or more seals may be provided at different points. As another example, the two or more sealing parts may be sealed by different methods. Any one of the two or more sealing parts may be sealed by fusion welding. Preferably, the sealing part may be a part sealed by high-frequency brazing. The other one of the two or more sealing parts may be sealed by pressure welding. Preferably, the sealing portion may be a portion sealed by pinch-off.

Optionally, the step of sealing the vacuum insulator component may include a sealing step in which the sealing part is sealed and the oxidation reducing step. An example of the process sequence related to the oxidation reduction step is as follows. Before the sealing step is performed, the steps of providing an inert gas to the sealing part or the periphery of the sealing part, providing a state of a lower than atmospheric pressure to the sealing part or the periphery of the sealing part, and the sealing part or the sealing part At least one of the steps of cooling the surroundings may be performed. During the sealing step is performed, the step of providing an inert gas to the sealing part or the periphery of the sealing part, providing a sub-atmospheric pressure state to the sealing part or the periphery of the sealing part, and the sealing part or the periphery of the sealing part At least one of these cooling steps may be performed. After the sealing step is performed, a step of cooling the sealing part or the periphery of the sealing part may be performed.

Optionally, the fastening part may include a through hole 41 provided in at least a portion of the plate. Examples of the through hole are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The through hole may provide a path through which the fluid moves in at least one of the vacuum insulator vacuum evacuation step and after the vacuum evacuation step is completed. The through hole may be a through hole for an exhaust port or a getter port. The amount of fluid moving through the through hole may be reduced or stopped after the vacuum insulator evacuation step is completed. For example, after the step of evacuating the vacuum insulator is completed, at least a portion of the exhaust port or the getter port may be sealed. An example of sealing may be pressure welding, such as a pinch-off. The through hole may be formed in the plate before the vacuum insulator evacuation step is performed or may be formed in an object connected to the plate.

Optionally, the fastening part may include a tube 40 . Examples related to the tube are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. An empty space is formed inside the tube to allow the fluid to pass therethrough. The tube may include at least one of an exhaust port and a getter port. The tube may include a first portion extending in a first direction from any one of the first and second plates and a second portion extending from the first portion in a second direction different from the first direction. For example, the first direction may be a longitudinal direction of the vacuum space portion, and the second direction may be a height direction of the vacuum space portion. Examples related to the vacuum insulator component sealing step and the tube are as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The step of sealing the vacuum insulator component may include providing an inert gas to the inside of the tube. The vacuum insulator component sealing step may include providing a state lower than atmospheric pressure inside the tube. The step of sealing the vacuum insulator part may include a step of cooling a part of the tube. The step of sealing the vacuum insulator component may include sealing a part of the tube by a first method, and sealing another portion of the tube by a second method different from the first method. For example, the first and second methods may be performed at different points. Any one of the first and second methods may include fusion welding. The other one of the first and second methods may include pressure welding. The vacuum insulator component sealing step may include at least one of a sealing step in which the sealing part is sealed and the oxidation reducing step. The tube may include a first portion in which the sealing step is performed and a second portion in which the oxidation reduction step is performed, and the first and second portions may be provided in different portions. The sealing step may be performed outside the tube, and the oxidation reduction step may be performed inside the tube. The first portion on which the sealing step is performed and the second portion on which the oxidation reduction step is performed may be provided to be spaced apart from each other. The first portion may be disposed closer to the plate than the second portion. The oxidation reduction step may include closing at least a portion of a through hole provided in a portion of the tube. The step of closing the through hole may include supporting the through hole by a jig. The oxidation reduction step may include closing at least a portion of the through hole provided in the other portion of the tube. The step of closing the through hole may include supporting the through hole by a jig. The oxidation reduction step may include providing an inert gas to a space in which a part of the pipe is provided between another part of the pipe. The oxidation reduction step may include the step of providing a state lower than atmospheric pressure in a space in which a part of the tube is provided between another part of the tube. The oxidation reduction step may include a step of cooling a part of the tube. The oxidation reduction step may include a step of providing a cold block to a part of the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Optionally, the part fastening part may include a curved part R forming the through hole 41 . An example of a curved part is as follows. The present invention may be any one of the following examples, or an example in which two or more are combined. The curved portion may be provided on at least one of the plate and a tube connected to the plate. The curved portion may be provided to surround the through hole. In this case, when sealing the through hole or the vicinity of the through hole, the sealing uniformity may be improved. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The curved portion may include a portion extending from the plate in which the through hole 41 is formed in a height direction of the vacuum space portion 50 or a length direction of the vacuum space portion.

Optionally, the component fastening portion may be provided on the periphery of the vacuum insulator, or the component fastening portion may be provided on at least a portion of the periphery of the first plate 10 and the periphery of the second plate 20 . Through this, it is possible to improve consumer sensibility.

Examples related to the sealing portions 41 (R) and 40c are as follows. The sealing part may be provided between the through hole of the part fastening part and the tube of the part fastening part. For example, the sealing part may include a curved part R formed between the through hole 41 and the tube 40 . In this case, there is an advantage in that the sealing area can be secured. Before the vacuum insulator evacuation step is performed, the curved portion may be sealed. For example, the sealing may include a melting point method for bonding through deformation by heat. As another example, the sealing may be performed at a temperature higher than the melting point of the support. The sealing portion may be provided at the edge 40c of the tube of the part fastening portion. The edge of the tube may be provided in a portion except between the through hole of the part fastening part and the tube of the part fastening part. After the vacuum insulator evacuation step is performed, the edge may be sealed. For example, the sealing may include a pressure point method in which the sealing is coupled through deformation by pressure. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The tube will be described in more detail.

In the process of evacuating the vacuum space part 50 through the tube 40, a fastening process of fastening the tube 40 to the plate, an exhaust process of evacuating to form the vacuum space part 50, and a sealing process of sealing the tube 40 . The fastening process, the exhaust process, and the sealing process may be sequentially performed. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The fastening process may be performed by sealing the tube 40 and the first plate 10 . Here, the sealing may be performed by brazing. The exhaust process may be performed by putting the tube 40 and the plate into an exhaust passage and baking at a high temperature to exhaust. The sealing process may be performed by pressure welding. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

The sealing process may be performed by cold welding. For example, the sealing process may be performed as a pinch-off process. For the pressure welding process, a copper tube 401 may be used as the material of the tube 40 . The tube 40 may use a tube having a thickness greater than 0.5 mm. The two facing surfaces of the tube may be overlapped and pressed against each other. The diameter of the tube may be a tube of 1.1 to 1.5 cm. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

In the pinch-off process, the cutting process of the tube 40 and the sealing process of the tube 40 may be performed together. In the pinch-off process, atoms on the inner surfaces of the tube that are spaced apart from each other are bonded to each other in atomic units. The bonding of the atomic unit may be an ionic bond. In order to smoothly perform the pinch-off process, it is required that there are no foreign substances on the inner surface of the tube, and that there are no scratches on the inner surface of the tube. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the aforementioned tube may be a copper tube.

FIG. 16 is a view for explaining a process of forming the vacuum space 50 using the tube 40 .

Referring to FIG. 16 , a piercing process S1 for the first plate 10 and a burring process S2 for the first plate 10 may be sequentially performed. 40 is a view for explaining the piercing process.

Referring to FIG. 17 , a fixing jig 410 is supported on the first plate 10 , and a hole may be machined using the piercing tool 411 .

18 is a view for explaining a burring process. Referring to FIG. 18 , a fixing jig 410 is supported on the first plate 10 , and a burr 402 may be formed in a hole using a burring tool. The hole may be 2-3mm smaller than the diameter of the burring tool. The burr 402 can be provided by this diameter difference. The burr 402 can be a flange 42 for the tube 40 . The inside of the burr may provide a through hole 41 .

Referring back to FIG. 16 , the tube 40 may be inserted into the flange 42 to be temporarily assembled (S3). In order to fasten the pipe 40 to the first plate 10 , a filler metal 403 may be mounted on a contact portion between the pipe 40 and the flange 42 ( S4 ). The filler metal 403 may mean that a material necessary for the brazing, such as flux, is included together. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the tube described above in FIG. 16 may be a copper tube 401 .

19 shows a state in which the filler metal is installed.

On the other hand, when the brazing is performed, when the tube 40 is exposed to high temperature, the material of the tube 40 may be oxidized. As a result, oxides 404 are formed on the inner and outer surfaces of the tube 40 . The oxide 404 is weak to impact and has high brittleness. Even if a material other than copper is used for the material of the tube 40, it may be oxidized at a high temperature to form a metal oxide. 26 shows that the oxide 404 is formed on the inner surface of the tube. An example of the tube described above in FIG. 19 may be a copper tube 401 . An example of the oxide described above in FIG. 19 may be copper oxide.

The oxide 404 generated on the inner surface of the tube 40 blocks ionic bonds between material atoms constituting the tube when the tube 40 is pinched off. The oxide 404 generated on the inner surface of the tube 40 may cause the sealing process to fail. The oxide 404 makes it impossible to bond between material atoms constituting the tube, which may cause a pinch-off defect. The oxide 404 may harden the tube 40 . The oxide 404 may make it difficult to deform the tube 40 during the pinch-off. As a result, the oxide 404 causes the pinch-off failure and consequent leakage of the tube 40 .

The oxide 404 generated on the inner surface of the tube 40 is exposed to the vacuum space 50 . The oxide 404 may cause outgassing into the vacuum space 50 . Due to the oxide 404 , the vacuum state inside the vacuum space 50 cannot be maintained at the design value. In this case, there is a problem in that the insulation loss increases. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the tube described above in FIG. 19 may be a copper tube 401 . An example of the oxide described above in FIG. 19 may be copper oxide.

The fastening process may be performed at a high temperature of about 200 degrees Celsius or more. In order to suppress the formation of the oxide 404 on the inner surface of the tube, the atmosphere on the inner surface of the tube may be an inert atmosphere. The inert atmosphere may prevent the inner surface of the tube from being oxidized.

Referring back to FIG. 16 , the first sealing jig may be mounted (S5), and then the second sealing jig may be mounted (S6).

20 and 21 , the first sealing jig 435 may be a lower sealing jig placed under the tube. The second sealing jig 436 may be an upper sealing jig placed on the top of the tube. The first and second sealing jigs may shield the inner space of the tube from the outer space. At least one of the second sealing jig 436 and the first sealing jig 435 may have a hole 4361 through which a gas may be injected. An inert gas may be introduced into the inner space of the tube through the hole. In an embodiment, the upper second sealing jig may have the gas inlet. In the embodiment, the lower sealing jig is mounted first compared to the upper sealing jig for convenience of handling and mounting, but the reverse case is also possible.

The first sealing jig 435 may seal the lower portion of the tube with respect to the external space. The first sealing jig 435 may support the first plate 10 . The sealing jig may support the tube and the first plate 10 to prepare for the next process. Thereafter, the second sealing jig 436 may seal the upper portion of the tube with respect to the external space. The tube 40 may have a first end fastened to the first plate 10 and a second end opposite to the end to provide the tube 40 . The brazing may be performed adjacent to the first end. The first end of the tube may be sealed with the first sealing jig 435 . The second end of the tube may be sealed with the second sealing jig 436 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the aforementioned tube may be a copper tube 401 .

The tube may be joined to the plate in at least one of the component preparation step and the component assembly step.

Referring back to FIG. 16 , gas may be introduced into the tube through the hole 4361 ( S7 ). After the gas is charged into the tube, the hole 4361 may be sealed (S8). The gas may include at least one of an inert gas such as argon and helium, and a flame retardant gas such as nitrogen, or a mixture thereof. Before the gas is charged into the inner space of the tube 40, an exhaust process for the inner space of the tube 40 may be performed first. The gas may be created in an environment in which the inner surface of the tube 40 is difficult to oxidize. In the inner space of the tube 40, there is no oxidizing agent necessary for oxidation or very little. Therefore, even when high heat is applied, the oxide 404 is not generated on the inner surface of the tube 40 . An example of the aforementioned tube may be a copper tube 401 . 22 shows a state in which both ends of the tube are sealed.

After both ends of the tube 40 are sealed, brazing may be performed (S9). The brazing may be performed by high-frequency brazing.

23 is a view showing that the brazing is performed.

Referring to FIG. 23 , high heat due to brazing is generated at the first end of the tube 40 and its adjacent region. Due to the high heat, the first end of the tube 40 and the flange 42 may be fastened by brazing. Oxide 404 may not be generated on the inner surface of the tube by the gas in the inner space of the tube. An example of the tube described above in FIG. 23 may be a copper tube 401 .

The brazing process shown in FIG. 23 may be performed before the vacuum evacuation step is performed. The tube 40 may be bonded to at least one of the first and second plates 10 and 20 . In the description of the embodiment, the tube 40 is presented to be joined to the first plate 10 , that is, the first plate 10 , but the present invention is not limited thereto and may be fastened to the second plate 20 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

Referring back to FIG. 16 , thereafter, the sealing jig separation ( S10 ), the exhaust process ( S11 ), and the pinch-off ( S12 ) may be performed. The exhaust process (S11) may be performed in a state in which the sealing jig is separated. The exhaust process may be performed by putting the plate and tube assembly into the exhaust passage. In order to obtain a high degree of vacuum, the exhaust path may be a high-temperature atmosphere when the exhaust process is performed. The high-temperature atmosphere of the exhaust path may act as a factor for generating the oxide 404 on the surface of the tube. Nevertheless, since the vacuum degree of the exhaust path is high and the oxidizing agent is in a lean state, the oxide 404 may not be generated.

24 shows a state in which the sealing jig is separated, and FIG. 25 is a view showing a pinch-off process.

Referring to FIG. 25 , it can be seen that the tube 40 is manufactured by pressing the tube 40 using a pinch-off device 433 to cut and seal the tube 40 . It can be seen that the portion pinched off by the pinch-off device 433 provides a pinch-off joint 430 on the inner surface of the tube 40 opposite. The pinch-off junction 430 forms at least one predetermined line by the pinch-off device 433 . In the pinch-off junction part 430 , the opposite surfaces of the tube 40 are strongly bonded to each other through ionic bonds between atoms. The tube 40 is formed toward the first space in the height direction of the third space, and may have a predetermined height. During the pinch-off, the oxide 404 does not exist on the inner surface of the tube 40 . There is an advantage of high sealing reliability according to the pinch-off. There is an advantage in that the fear of vacuum breakage through the tube 40 is reduced. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the tube described in FIG. 25 may be a copper tube 401 .

Another embodiment of the present invention is presented.

Even when the interior of the exhaust passage is in a high vacuum state, the oxide 404 may be generated on the surface of the tube 40 because the exhaust process S11 is performed in a high temperature atmosphere. In this case, in order to prevent the formation of the oxide 404 , a low-temperature block 420 may be installed on the surface of the tube 40 . By the low-temperature block 420, the position at which the pinch-off is performed in the tube may be maintained at 150 degrees C or less. The internal temperature atmosphere of the exhaust passage may be 180 degrees Celsius or more. An example of the tube may be a copper tube 401 . Examples of the aforementioned tube may be ports such as exhaust ports or getter ports.

In another embodiment, the tube 40 may be joined to the plate in at least one of the component preparation step and the component assembly step. The tube 40 can be handled in a sealed state by the first and second sealing jigs. The sealing state of the tube 40 includes a process of sealing the first and second sealing jigs at both ends of the tube, a process of charging gas into the interior of the tube 40, and sealing the hole of the sealing jig It can be said that any one or all of the processes are performed. Here, when all the processes are performed, there is no fear of foreign substances entering the inner surface of the tube 40 after that, and there is no need to clean the inner surface of the tube 40 . Since cleaning of the inner surface of the tube 40 is unnecessary, there is an advantage in that the risk of scratches or the like occurring on the inner surface of the tube 40 is reduced. Here, any one or all of the processes may be performed in the component preparation step and the component assembly step. Here, any one or all of the processes may be performed before the temporary assembly of the tube 40 and the plate. Examples of the aforementioned tube may be ports such as exhaust ports or getter ports. An example of the aforementioned tube may be a copper tube 401 .

According to the present invention, it is possible to provide a vacuum insulator that can be applied to real life.

Claims (20)

a first plate having a first temperature; a second plate having a second temperature different from the first temperature; and
a sealing part sealing the first plate and the second plate so as to provide a vacuum space part;
After the vacuum insulator component preparation step in which the first plate and the second plate are prepared in advance, the vacuum insulator component assembly step in which the prepared first plate and the second plate are assembled, and the component assembly step, the first plate and It is manufactured by the vacuum insulator vacuum evacuation step in which the gas in the space formed between the second plates is discharged,
A vacuum insulator, characterized in that before the vacuum insulator evacuating step, a vacuum insulator component sealing step of sealing the space between the first plate and the second plate is performed. The method of claim 1,
The vacuum insulator component sealing step includes a step of providing an inert gas to the sealing part or a periphery of the sealing part. The method of claim 1,
The vacuum insulator component sealing step includes the step of providing a state lower than atmospheric pressure to the sealing part or a periphery of the sealing part. The method of claim 1,
The vacuum insulator component sealing step may include a step of cooling the sealing part or a periphery of the sealing part. The method of claim 1,
The vacuum insulator component sealing step includes a step of performing sealing in two or more sealing parts. 6. The method of claim 5,
The two or more sealing parts are vacuum insulators performed at different points. 6. The method of claim 5,
Any one of the two or more sealing parts is a vacuum insulator for sealing by fusion. 7. The method of claim 6,
A vacuum insulator sealing the other one of the two or more sealing parts by pressure welding. a first plate having a first temperature; a second plate having a second temperature different from the first temperature; and
a sealing part sealing the first plate and the second plate so as to provide a vacuum space part;
After the vacuum insulator component preparation step in which the first plate and the second plate are prepared in advance, the vacuum insulator component assembly step in which the prepared first plate and the second plate are assembled, and the component assembly step, the first plate and It is manufactured by the vacuum insulator vacuum evacuation step in which the gas in the space formed between the second plates is discharged,
Before the vacuum insulator evacuation step, a vacuum insulator component sealing step of sealing the space between the first plate and the second plate is performed,
The vacuum insulator component sealing step includes a sealing step in which the sealing part is sealed and an oxidation reducing step of reducing oxidation in the sealing part or around the sealing part. 10. The method of claim 9,
The oxidation reduction step is a step of providing an inert gas to the sealing part or the periphery of the sealing part, providing a state lower than atmospheric pressure to the sealing part or the periphery of the sealing part, and cooling the sealing part or the periphery of the sealing part A vacuum insulator comprising at least one of the steps and sealing by fusion welding and sealing by pressure welding are performed at points spaced apart from each other. 11. The method of claim 10,
Before the sealing step is performed, the steps of providing an inert gas to the sealing part or the periphery of the sealing part, providing a state of a lower than atmospheric pressure to the sealing part or the periphery of the sealing part, and the sealing part or the sealing part A vacuum insulator in which at least one of the steps of cooling the surroundings is performed. 11. The method of claim 10,
During the sealing step is performed, the step of providing an inert gas to the sealing part or the periphery of the sealing part, providing a sub-atmospheric pressure state to the sealing part or the periphery of the sealing part, and the sealing part or the periphery of the sealing part A vacuum insulator in which at least one of the cooling steps is performed. 11. The method of claim 10,
After the sealing step is performed, a vacuum insulator in which the step of cooling the sealing part or the periphery of the sealing part is performed. a first plate having a first temperature; a second plate having a second temperature different from the first temperature;
a sealing part sealing the first plate and the second plate to provide a vacuum space part; and
It includes a fastening part provided on the periphery of the vacuum insulator,
The sealing part is provided between the through hole of the part fastening part and the tube of the part fastening part,
After the vacuum insulator component preparation step in which the first plate and the second plate are prepared in advance, the vacuum insulator component assembly step in which the prepared first plate and the second plate are assembled, and the component assembly step, the first plate and It is manufactured by the vacuum insulator vacuum evacuation step in which the gas in the space formed between the second plates is discharged,
A vacuum insulator, characterized in that before the vacuum insulator evacuating step, a vacuum insulator component sealing step of sealing the space between the first plate and the second plate is performed. 15. The method of claim 14,
The vacuum insulator component sealing step includes a sealing step in which the sealing part is sealed and an oxidation reducing step of reducing oxidation in the sealing part or around the sealing part. 16. The method of claim 15,
The tube includes a first portion in which the sealing step is performed and a second portion in which the oxidation reduction step is performed, wherein the first and second portions are different portions. 17. The method of claim 16,
The sealing step is performed outside the tube, and the oxidation reduction step is performed inside the tube. 18. The method of claim 17,
A vacuum insulator provided with a first portion on which the sealing step is performed and a second portion on which the oxidation reduction step is performed are spaced apart from each other. 19. The method of claim 18,
The first portion is a vacuum insulator disposed closer to the plate than the second portion. 15. The method of claim 14,
The sealing is a vacuum insulator that is press-contact.

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