KR20220078548A - A refrigerator comprising a vacuum space - Google Patents

Abstract

The present invention relates to a refrigerator having a vacuum space portion, and more particularly, to a refrigerator capable of improving the insulation function of the refrigerator by forming a vacuum space portion between an outer case and an inner case constituting the main body.
The refrigerator having a vacuum space of the present invention includes a main body having a storage space in which a predetermined storage material can be accommodated, wherein the main body has an inner case in which the storage space is formed inside and a communication hole is formed on one side. Wow; an outer case in which the inner case is accommodated, the inner surface of which is spaced apart from the outer surface of the inner case by a predetermined distance, and a communication hole is formed at a position corresponding to the communication hole of the inner case; a vacuum space portion provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; It characterized in that it comprises a connecting pipe that connects the communication port of the inner case and the communication port of the outer case in the vacuum space part to form a passage through which drainage or piping passes.

Description

A refrigerator comprising a vacuum space

The present invention relates to a refrigerator having a vacuum space portion, and more particularly, to a refrigerator capable of improving the insulation function of the refrigerator by forming a vacuum space portion between an outer case and an inner case constituting the main body.

BACKGROUND ART A refrigerator is an electrical appliance that can refrigerate or freeze storage by maintaining the temperature of a storage room at a temperature above zero or below zero by using a refrigerant cycle.

A general configuration of a refrigerator includes a main body having a storage space for storing stored items, and a door rotatably or slidably arranged on the main body to open and close the storage space.

The main body includes an inner case in which a storage space is formed and an outer case in which the inner case is accommodated, and a heat insulating material is disposed between the inner case and the outer case.

The temperature in the storage space is suppressed from being affected by the external temperature by such a heat insulating material.

As the insulating material, a urethane foam material is often used, and liquid urethane is injected into the space between the inner case and the outer case and foamed.

However, in order to realize the insulation effect using the insulation material, the thickness of the insulation material must be secured to a certain extent, which means that the insulation material becomes thicker. it gets bigger

However, in recent years, the trend of compact refrigerators has emerged, and the need for a structure capable of increasing the internal storage space while reducing the external size has emerged.

Therefore, the present invention proposes a refrigerator of a new structure in which a vacuum space is formed to insulate, rather than injecting an insulating material between the inner case and the outer case of the refrigerator.

On the other hand, in the refrigerator, since water vapor is cooled and adheres to the evaporator constituting the refrigerating cycle, a defrosting device is provided that heats it to make water and then removes it.

The water melted by the defrosting device is connected to be discharged to the outside of the refrigerator through a drain pipe, and the drain pipe is connected to the outside through the inner case and the outer case and the insulating material therebetween.

Also, in addition to the drain pipe, a pipe may be connected from the inside of the refrigerator to the outside.

In the case of a conventional refrigerator in which a foam material is provided in the space between the inner case and the outer case, the pipe may simply be connected to a pipe so as to pass through the inner case, the insulating material and the outer case.

So, the pipe was simply molded from plastic, and then piped to pass through the inner case and the outer case, and then the insulating material was foam-molded.

However, in the case of the vacuum refrigerator of the present invention, since the pipe must be connected to pass through the vacuum space while maintaining the sealed state of the vacuum space, when a plastic pipe is used, it is difficult not only to seal the connection part, but also to reduce the vacuum pressure of the vacuum space. I have an intolerable problem.

In addition, when the pipe is formed using a metal pipe that can be welded to the inner case and the outer case, which are generally made of a steel plate, there is a problem in that heat transfer occurs through the pipe, thereby impairing the insulation performance of the refrigerator.

The present invention has been devised to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a refrigerator capable of forming a vacuum space between an inner case and an outer case to increase the thermal insulation effect and to achieve a compact external volume. have.

Another object of the present invention is to provide a refrigerator having a support structure capable of maintaining a gap between the inner case and the outer case without being deformed by an external impact while a vacuum space is formed between the inner case and the outer case.

Another object of the present invention is to provide a refrigerator including a connection pipe having a structure capable of withstanding vacuum pressure while a drain, pipe, or refrigerant pipe passing through a vacuum space passes.

In addition, an object of the present invention is to provide a connection pipe structure capable of minimizing heat transfer through the connection pipe connected to pass through the vacuum space.

A refrigerator having a vacuum space part of the present invention for achieving the above object includes a main body having a storage space in which a predetermined storage material can be accommodated, wherein the main body has the storage space formed inside and one side of the refrigerator. an inner case in which a communication hole is formed; an outer case in which the inner case is accommodated, the inner surface of which is spaced apart from the outer surface of the inner case by a predetermined distance, and a communication hole is formed at a position corresponding to the communication hole of the inner case; a vacuum space portion provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; It characterized in that it comprises a connecting pipe that connects the communication port of the inner case and the communication port of the outer case in the vacuum space part to form a passage through which drainage or piping passes.

Preferably, the connecting pipe has a corrugated sidewall to maintain strength to maintain airtightness of the vacuum space and to minimize heat transfer by conduction.

The connecting pipe is preferably in the form of a bellows type pipe.

It is preferable that the connection pipe is manufactured by molding a thin metal plate and welded to the inner case and the outer case, respectively.

It is preferable that the side wall corrugation of the connector is made of a thin metal plate of 0.05 to 0.2 mm.

The main body includes a first support plate provided on at least one of the surfaces facing each other of the inner case and the outer case, and is fixed to the first support plate to maintain a gap between the inner case and the outer case. It is preferable to further include a plurality of spacers.

Preferably, the main body further includes a second support plate provided on at least one of the surfaces facing each other of the inner case and the outer case and disposed to face the first support plate.

Preferably, the inner surface of the second support plate includes a plurality of grooves formed so that the ends of the plurality of spaces are inserted.

Preferably, the connecting pipe is spaced apart from the spacers so as not to interfere with the plurality of spacers.

Preferably, the connection pipe penetrates the first support plate and the second support plate and is welded to the inner case and the outer case, respectively.

The connecting pipe is preferably coated with plastic to prevent corrosion on its inner surface.

According to the above-described refrigerator of the present invention of the present invention, a vacuum space portion is formed between the inner case and the outer case, not a conventional heat insulator, and heat transfer between the inner case and the outer case is suppressed by the vacuum space portion. action takes place

Since the thermal insulation effect in a vacuum state is significantly superior to the thermal insulation effect of the conventional thermal insulator, the refrigerator according to the present invention has an advantage in that the thermal insulation is superior to that of the conventional refrigerator.

On the other hand, in the case of the vacuum space part, if only the vacuum state is maintained regardless of the thickness (the distance between the inner case and the outer case), heat insulation is achieved. The increase in thickness leads to an increase in the size of the refrigerator.

Accordingly, the refrigerator according to the present invention can reduce the size of the outer case portion while maintaining the same storage space as compared to the conventional refrigerator, thereby contributing to the compactness of the refrigerator.

In addition, there is provided a refrigerator including a connection pipe having a structure capable of withstanding vacuum pressure while a drain or pipe passing through the vacuum space passes.

In addition, it is possible to minimize heat transfer through the connection pipe connected to penetrate the vacuum space between the inner case and the outer case.

In addition, since at least a portion of the side wall of the connection pipe is formed in a bellows-type pipe shape, elastic deformation is possible, and thus durability against external impact is excellent.

1 is a perspective view showing an example of a refrigerator according to the present invention.
2 is a partially cut-away perspective view showing that a connector is connected through a vacuum space between an inner case and an outer case in the refrigerator according to the present invention.
FIG. 3 is a partial cross-sectional view showing the connecting tube of FIG. 2 and an inner case and an outer case around it.
Figure 4 is a perspective view separately showing the connector of Figure 3;
5 is a partially cut-away perspective view illustrating an inner case and an outer case, a spacer therebetween, and an assembly structure thereof.
6 is a partial cross-sectional perspective view illustrating a state in which the connection pipe of FIG. 4 is welded and assembled to the case structure of FIG. 5 .
7 is a cross-sectional view illustrating that a plastic coating layer is formed on the inner surface of the connector of FIG. 3 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows an example of a refrigerator according to the present invention. FIG. 2 is a partially cut-away perspective view showing that a connector is connected through a vacuum space between an inner case and an outer case in the refrigerator according to the present invention. 3 is a partial cross-sectional view showing the connecting pipe of FIG. 2 and the inner case and the outer case around it. 4 is a perspective view showing a connector separately.

As shown in FIG. 1 , the refrigerator according to the present invention includes a main body 1 in which a storage compartment is formed, a first door 4 rotatably provided on the left side of the main body 1 , and the main body 1 . and a second door 5 rotatably provided on the right side of the .

Here, the first door 4 opens and closes the freezing compartment of the storage compartment, and the second door 5 functions to open and close the refrigerating compartment of the storage compartment, but the present invention is not limited to the refrigerator having this structure.

That is, the refrigerator of FIG. 1 is a so-called side-by-side type refrigerator in which the freezing compartment is disposed on the left and the refrigerating compartment on the right side, but the refrigerator of the present invention is a refrigerator of any type regardless of how the refrigerating compartment and the freezing compartment are arranged. Can be applied to refrigerators. In addition, of course, the present invention may be applied to a refrigerator having only a refrigerating compartment or a freezing compartment, or a refrigerator further including a separate cooling compartment in addition to the refrigerating compartment and the freezing compartment.

Looking at the structure of the main body 1, the inner case 110 in which the storage space is formed on the inside; an outer case 120 in which the inner case is accommodated and spaced apart from the inner case by a predetermined distance; a vacuum space unit 130 provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state, to perform an insulating action between the inner case and the outer case; In the vacuum space portion, the communication port 112 of the inner case and the communication port 122 of the outer case are connected, and a connection pipe 200 forming a passage through which a drain or pipe passes is included.

The outer case 120 and the inner case 110 are disposed to be spaced apart from each other, and a separate insulating material is not disposed in this space, but is maintained only in a vacuum state to perform an insulating action.

That is, the vacuum space 130 is formed between the outer case 120 and the inner case 110, so that the medium mediating the heat transfer between the inner case 110 and the outer case 120 is removed. keep

As a result, it is possible to prevent the heat of the hot air outside the outer case 120 from being transferred to the inner case 110 and the inside thereof.

Meanwhile, in FIG. 1 , the inner case 110 , the outer case 120 , and the spacer 150 are illustrated in a state where the connection pipe 200 is omitted for convenience.

The connection pipe 200 and the spacer 150 will be described in detail later.

The connection pipe 200 is used as a passage for discharging defrost water such as an evaporator, or a passage through which a pipe connected from the inside of the inner case 110 to the outside of the outer case 120 can pass. can be

Since the connection pipe 200 has to maintain a vacuum state while penetrating the vacuum space 130 , it is preferable that the connection portions with the inner case 110 and the outer case 120 are each welded to withstand the vacuum pressure.

To this end, since both the inner case 110 and the outer case 120 are generally made of a steel plate, the connecting pipe 200 is preferably made of a metal material that can be welded to the steel plate.

In addition, it is preferable that the side wall of the connector 200 is corrugated to maintain strength to maintain the airtightness of the vacuum space 130 and to minimize heat transfer by conduction.

A sidewall portion of the connector 200 having a corrugated shape is referred to as a sidewall corrugation 240 .

The sidewall corrugation 240 has to withstand the vacuum pressure difference inside and outside the vacuum space 130 , so it must have excellent strength.

In the case of simply making a pipe-type connector with a thick steel plate and welding it to secure high strength, the strength may be sufficient, but the heat insulation performance may be significantly reduced due to heat conducted through the connector.

In order to prevent this, as shown in FIG. 3 , the side wall wrinkle part 240 is laminated with a plurality of thin metal plates with holes therein, but the inner and outer diameter portions are sequentially welded to form a zigzag side profile. It is preferable to be manufactured to achieve this.

The shape of the sidewall corrugation 240 may be a bellows-type pipe, and it is preferable that at least a portion of the sidewall of the connecting pipe 200 of the present invention is a bellows-type pipe.

As described above, the sidewall corrugation 240 of the connecting pipe 200 is manufactured by sequentially welding the inner and outer diameter portions while stacking thin metal plates, and the sidewall corrugation 240 is again the upper tube portion ( 220) and the lower pipe portion 230 and the upper and lower portions thereof are welded and integrally manufactured.

The upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are each manufactured in the form of a circular pipe having a predetermined height, diameter and thickness, and are welded to the sidewall corrugation part 240 to connect the pipe 200. make up

The height of the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 may be appropriately formed in consideration of the heights of the sidewall wrinkle part 240 and the vacuum space part 130 .

For example, when the upper pipe part 220 and the lower pipe part 230 of the connecting pipe 200 are welded to the outer case 120 and the inner case 110, as shown in FIG. 3 , the external The upper surface of the case 120 and the lower surface of the inner case 110 may be welded to protrude upward and downward, respectively.

In addition, unlike this, when the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 are welded to the outer case 120 and the inner case 110, as shown in FIG. 6 , the The upper surface of the outer case 120 and the lower surface of the inner case 110 may be formed so that their heights coincide with each other so that they do not protrude.

In addition, the height of the sidewall corrugation 240 of the connection pipe 200 may also be formed to match the height of the vacuum space 130 , or may be formed to be smaller than that of the vacuum space 130 .

In FIG. 3 , the height of the sidewall pleats 240 is shown to match the height of the vacuum space 130 , whereas in FIG. 6 , the height of the sidewall pleats 240 is the height of the vacuum space 130 . ) is formed smaller than the height of

The shape of the sidewall corrugation 240 of the connector 200 is formed of a thin metal plate, and the strength of the thin metal plate by the shape of the sidewall corrugation 240, in particular, the strength to withstand the vacuum pressure in the radial direction. It is a structure capable of minimizing heat transfer by conduction by forming a very long path through which heat is conducted through the connection pipe 200 as well as much increase.

In addition, in the inner case 110 and the outer case 120, communication ports 112 and 122 (refer to FIG. 6) are formed in advance, respectively.

In the connection pipe 200 , the upper pipe part 220 is welded to the communication hole 112 of the outer case 120 , and the lower pipe part 230 is welded to the communication hole 122 of the inner case 110 . and can be assembled.

In addition, the sidewall corrugation 240 of the connector 200 may be manufactured by welding while laminating thin metal plates, but the upper pipe part 220, the sidewall corrugation 240 and the lower pipe part 230 are It may be integrally manufactured by a press molding method.

The connector 200 manufactured in this way is shown in FIG. 4 .

The sidewall corrugation 240 of the connector 200 is preferably made of a thin metal plate of 0.05 to 0.2 mm.

Since the sidewall corrugation 240 has to withstand the vacuum pressure in the vacuum space, it may have sufficient strength to be 0.05 mm or more.

In addition, since the sidewall corrugation 240 serves as a passage through which heat is transferred from the outer case 120 to the inner case 110 by conduction, it is preferable to have a thickness of 0.2 mm or less.

The upper pipe part 220 and the lower pipe part 230 may be formed thicker than the sidewall wrinkle part 240, but if only an appropriate strength can be maintained, it is preferable to form not too thick to reduce heat transfer by conduction will be.

Meanwhile, the main body 1 includes a first support plate 160 provided on at least one of the surfaces facing each other of the inner case 110 and the outer case 210, and is fixedly disposed on the first support plate to provide the inner case. It is preferable to further include a plurality of spacers 150 that support to maintain a gap between the case and the outer case.

2, in order to maintain the shape of the vacuum space 130 between the inner case 110 and the outer case 120, the inner case 110 and the outer case 120 It is preferable that a plurality of spacers 150 to maintain a distance therebetween are disposed between the inner case 110 and the outer case 120 . A plurality of spacers 150 are arranged and supported to maintain a distance between the inner case 110 and the outer case 120 .

A plurality of spacers 150 should be fixed between the inner case 110 and the outer case 120 , and as a structure for fixing them, the plurality of spacers 150 are provided on the first support plate 160 . formed integrally with the

The first support plate 160 may be provided so as to be in contact with any one of the facing surfaces of the inner case 110 and the outer case 120 .

In FIG. 2 , the first support plate 160 is disposed to contact the outer surface of the inner case 110 , but the first support plate 160 may be disposed to contact the inner surface of the outer case 120 .

In addition, as will be described later with reference to FIGS. 5 and 6 , the first support plate 160 is disposed so as to be in contact with the outer surface of the inner case 110 and is disposed to be in contact with the inner surface of the outer case 120 . A second support plate 170 may be further provided so that the spacers 150 of the first support plate 160 are in contact with the second support plate 170 .

Referring to the connecting pipe 200 shown in FIG. 3 , the sidewall wrinkle portion 240 may be formed to have an outer diameter larger than the interval between the two adjacent spacers 150 .

However, as shown in FIG. 2 , the connector 200 may be disposed so as not to interfere with the four adjacent spacers 150 .

That is, it is preferable that the connection pipe 200 is spaced apart from the spacers so as not to interfere with the plurality of spacers 150 .

In this way, the connecting pipe 200 can be disposed between the first supporting plate 160 and the second supporting plate 170 on which the plurality of spacers 150 are disposed, as well as from the connecting pipe 200 to the Heat transfer to the spacer 150 may be minimized.

As shown in FIGS. 5 and 6 , the main body 1 is provided on any other surface of the surfaces facing each other of the inner case 110 and the outer case 120 and is disposed to face the first support plate. It is preferable to further include a second support plate 170 .

5 and 6 , the second support plate 170 is disposed to contact the inner surface of the outer case 120 , and the plurality of spacers 150 are fixed to the first support plate 160 . is disposed to support to maintain a gap between the first support plate 160 and the second support plate 170 .

Since the first support plate 160 is in contact with the outer surface of the inner case 110 and the second support plate 170 is in contact with the inner surface of the outer case 120 , the plurality of spacers 150 are As a result, it is supported to maintain a gap between the inner case 110 and the outer case 120 .

5 and 6, the first support plate 160 and the second support plate 170 arranged to be spaced apart from each other are provided, but as shown in FIG. 2, a plurality of spacers 150 are integrated. Only the first support plate 160 fixedly arranged as may be provided between the inner case 110 and the outer case 120 .

In this way, in the absence of the second support plate 170 , the ends of the plurality of spacers 150 may be disposed to directly contact the inner surface of the outer case 120 .

It will be understood that in FIG. 5, the connection pipe 200 is omitted for convenience.

In addition, as shown in the enlarged view of FIG. 5 , the second support plate 170 preferably includes a plurality of groove portions 175 formed so that the ends of the plurality of spaces 150 are inserted into the inner surface thereof. .

The plurality of groove portions 175 formed in the second support plate 170 are formed in the spacers 150 when the second support plate 170 is superimposed on the plurality of spaces 150 integrally formed in the first support plate 160 . to be fixed relative to the

In addition, it is preferable that the ends of the plurality of spacers 150 have a convex curved surface.

As shown in the enlarged circle of FIG. 5 , by forming the end of the spacer 150 in a convex curved shape, the end of each spacer 150 is in the groove 175 formed in the second support plate 170 during assembly. As it is easily seated, assembly work can be much easier.

In addition, it is more preferable that the plurality of groove portions 175 of the second support plate 170 have a concave curved shape corresponding to the shape of the plurality of spacers 150 .

Since the plurality of groove portions 175 of the second support plate 170 are formed in a shape corresponding to the shape of the plurality of spacers 150, positioning is easy during assembly and the second support plate 170 is not only easily positioned after assembly. It can be fixed so as not to move in a direction parallel to its surface.

It is preferable that the connection pipe 200 penetrates the first support plate 160 and the second support plate 170 to be welded to the inner case 110 and the outer case 120, respectively.

Referring to FIG. 6 , communication holes 112 and 122 are formed in the inner case 110 and the outer case 120 so that the lower and upper portions of the connection pipe 200 can be welded to each other.

That is, each of the outer surfaces of the upper pipe part 220 and the lower pipe part 230 of the connection pipe 200 is the communication hole 112 of the inner case 110 and the communication hole 122 of the outer case 120 . are welded to each.

In addition, communication holes 162 and 172 concentric with the connecting pipe 200 are also formed in the above-described first support plate 160 and second support plate 170 , respectively.

It is preferable that the communication holes 162 and 172 of the first support plate 160 and the second support plate 170 have a larger diameter than the communication holes 112 and 122 of the inner case 110 and the outer case 120 . do.

The inner case 110 and the outer case 120 are made of a steel plate, and the first support plate 160 and the second support plate 170 may be made of any one of metal, ceramic, and reinforced plastic.

Therefore, when the connecting pipe 200 is welded to the inner case 110 and the outer case 120 , the first support plate 160 and the second support plate 170 are structures for supporting the plurality of spacers 150 . ), it is preferable to form the communication openings 162 and 172 of the case larger than the communication openings 112 and 122 of the support plate.

Finally, the connecting pipe 200 is preferably coated with plastic to prevent corrosion on the inner surface.

The inner surface of the connection pipe 200 made of a thin metal plate may be corroded because a liquid such as water or a refrigerant may flow into the inner surface or external air may be introduced.

Accordingly, as shown in FIG. 7 , by forming a coating layer 260 of plastic or the like on the inner surface of the connection pipe 200 , corrosion can be prevented and durability can be improved.

According to the refrigerator having a vacuum space portion of the present invention, there is provided a refrigerator having a connection tube structure capable of withstanding vacuum pressure while drainage or piping passing through the vacuum space portion passes.

In addition, heat transfer through the connector can be minimized by manufacturing the sidewall of the connector in the form of a corrugated bellows.

In the above, preferred embodiments of the present invention have been described, but the scope of the present invention is not limited only to these specific examples, and those of ordinary skill in the art will appropriately fit within the scope described in the claims of the present invention. change will be possible.

1: body
4, 5: Door
110: inner case
112: Yeontong-gu
120: outer case
122: Yeontonggu
130: vacuum space
150: spacer
160: first support plate
162: Yeontong-gu
170: second support plate
172: Yeontong-gu
175: groove
200: connector
220: upper pipe part
230: lower pipe
240: sidewall pleats
260: coating layer

Claims (16)

an inner case having a storage space formed inside;
an outer case accommodating the inner case, the inner surface of which is disposed to be spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface of which has an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage through at least a portion of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connecting pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space may pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has a connecting pipe inner space provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connection pipe has a higher pressure than the vacuum space,
The internal space of the connection pipe is the same pressure as the storage space, or the internal space of the connection pipe is the same pressure as the external space,
The connecting tube includes a side wall positioned between the inner case and the outer case, and the side wall is manufactured such that the inner diameter portion and the outer diameter portion are sequentially coupled to form a zigzag side profile.
The method of claim 1,
A refrigerator in which the inner diameter portion and the outer diameter portion are assembled by welding.
The method of claim 1,
The connecting pipe includes an upper pipe part and a lower pipe part connected to the side wall, and after the side wall is manufactured, the upper pipe part and the lower pipe part are respectively assembled to the side wall.
4. The method of claim 3,
The side wall and the upper pipe part or the side wall and the lower pipe part are assembled by welding.
4. The method of claim 3,
After the upper pipe part and the lower pipe part are respectively assembled to the side wall, the upper pipe part and the lower pipe part are assembled to the outer case and the inner case, respectively.
4. The method of claim 3,
The upper pipe part and the lower pipe part, when the upper pipe part and the lower pipe part are assembled with the outer case and the inner case, the upper surface of the outer case and the lower surface of the inner case so that the heights coincide with each other so as not to protrude Refrigerator formed.
7. The method of claim 6,
The upper pipe part and the outer case, or the lower pipe part and the inner case are assembled by welding.
4. The method of claim 3,
The upper pipe part and the lower pipe part are formed to protrude upward and downward from the upper surface of the outer case and the lower surface of the inner case, respectively, when the upper pipe part and the lower pipe part are assembled with the outer case and the inner case refrigerator.
9. The method of claim 8,
The upper pipe part and the outer case, or the lower pipe part and the inner case are assembled by welding.
The method of claim 1,
The connecting pipe includes an upper pipe part and a lower pipe part connected to the side wall, and a height of the side wall is equal to or smaller than a height of the vacuum space part.
The method of claim 1,
The connecting pipe is formed to protrude more inward than the lower surface of the inner case and to protrude more outward than the upper surface of the outer case, or is formed to match the lower surface of the inner case and the height thereof, and the upper surface and the height of the outer case A refrigerator that is formed to match.
The method of claim 1,
The connection pipe includes an upper pipe part and a lower pipe part connected to the side wall, and the upper pipe part protrudes further out than the upper surface of the outer case or is formed to match the upper surface of the outer case in height, or the lower part The tube portion is formed to protrude more inward than the lower surface of the inner case or to match the lower surface of the inner case in height.
an inner case having a storage space formed inside;
an outer case accommodating the inner case, the inner surface of which is disposed to be spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface of which has an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage through at least a portion of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connecting pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space may pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has a connecting pipe inner space provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connection pipe has a higher pressure than the vacuum space,
The internal space of the connection pipe is the same pressure as the storage space, or the internal space of the connection pipe is the same pressure as the external space,
The connecting pipe includes a side wall positioned between the inner case and the outer case, and an upper pipe part and a lower pipe part connected to the side wall, and after the side wall is manufactured, the upper pipe part and the lower pipe part are attached to the side wall Each refrigerator is assembled.
14. The method of claim 13,
The side wall and the upper pipe part or the side wall and the lower pipe part are assembled by welding.
14. The method of claim 13,
After the upper pipe part and the lower pipe part are respectively assembled to the side wall, the upper pipe part and the lower pipe part are assembled to the outer case and the inner case, respectively.
an inner case having a storage space formed inside;
an outer case accommodating the inner case, the inner surface of which is disposed to be spaced apart from the outer surface of the inner case by a predetermined distance, and the outer surface of which has an outer space;
a vacuum space provided between the inner case and the outer case, the inside of which is sealed and maintained in a vacuum state to perform an insulating action between the inner case and the outer case; and
It forms a passage through at least a portion of the vacuum space and includes a connection pipe provided to withstand vacuum pressure,
The connecting pipe is provided to be connected to a communication hole formed in a part of the inner case and the outer case,
Objects other than storage that can be accommodated in the storage space may pass through the connection pipe, and the storage cannot pass through the connection pipe,
The connecting pipe has a connecting pipe inner space provided inside the connecting pipe connecting the vacuum space and the external space,
The inner space of the connection pipe has a higher pressure than the vacuum space,
The internal space of the connection pipe is the same pressure as the storage space, or the internal space of the connection pipe is the same pressure as the external space,
The connecting pipe includes a side wall positioned between the inner case and the outer case, the height of the side wall is equal to or smaller than the height of the vacuum space, and the connecting pipe includes an upper pipe part and a lower part connected to the side wall. A refrigerator containing a pipe part.

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