CN114636257A - Refrigerator - Google Patents

Abstract

The present invention provides a refrigerator, comprising: a box body defining a first storage compartment and a second storage compartment; a vapor compression refrigeration system including an evaporator; and a Stirling refrigeration system configured to The second storage compartment provides cooling; and an air supply air duct is configured to connect the first storage compartment and the second storage compartment at both ends, so that after heat exchange by the evaporator The air flow can be transported into the second storage compartment through the air supply air duct, so that the vapor compression refrigeration system can be used to supply cooling to the second storage compartment. The storage temperature of the second storage compartment of the refrigerator of the present invention is widened; by arranging air supply air ducts respectively connecting the first storage compartment and the second storage compartment at both ends, the vapor compression refrigeration system can reach the second storage compartment. The utility room provides cooling and is cleverly constructed and easy to set up.

Description

refrigerator

technical field

The invention relates to the field of refrigeration, in particular to a refrigerator.

Background technique

With the emphasis on health, household stocks of high-end ingredients are also increasing. After research, the storage temperature of ingredients is lower than their glass transition temperature, the properties of ingredients will be relatively stable, and the shelf life will be greatly extended. Among them, the glass transition temperature of ingredients is mostly concentrated at -80°C to -30°C. The cryogenic compartment of the existing domestic refrigerator using Stirling refrigeration is only cooled by the Stirling refrigeration system, so that the storage temperature of the compartment is generally -14°C to -80°C, and it can only be used for frozen food.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a refrigerator capable of widening the storage temperature of the second storage compartment.

A further object of the present invention is to provide a refrigerator in which the second storage compartment can be jointly refrigerated by the Stirling refrigeration system and the vapor compression refrigeration system, and has an ingenious structure and is easy to set up.

In particular, the present invention provides a refrigerator, comprising:

a box body, which defines a first storage compartment and a second storage compartment;

a vapor compression refrigeration system, including an evaporator, and the evaporator is arranged in the first storage compartment;

a Stirling refrigeration system configured to provide cooling to the second storage compartment; and

The air supply air duct is configured so that the two ends are respectively connected to the first storage compartment and the second storage compartment, so that the airflow after heat exchange by the evaporator can be transported to the second storage compartment through the air supply air duct, Thus, the vapor compression refrigeration system is used to supply cooling to the second storage compartment.

Optionally, the Stirling refrigeration system includes a Stirling refrigerator and a heat exchanger, the heat exchanger being thermally connected to the cold end of the Stirling refrigerator; and

A first air duct cover plate is arranged on the inner side of the inner tank of the first storage compartment, a first accommodating cavity is defined between the first air channel cover plate and the inner tank of the first storage compartment, and the evaporator is arranged in the first storage compartment. in the accommodating cavity;

A second air duct cover plate is arranged on the inner side of the inner tank of the second storage compartment, a second accommodating cavity is defined between the second air channel cover plate and the inner tank of the second storage compartment, and the heat exchanger is arranged in the second storage compartment. two accommodating chambers;

One end of the air supply duct is communicated with the first accommodating cavity, and the other end is communicated with the second accommodating cavity.

Optionally, the first storage compartment and the second storage compartment are arranged side by side along the lateral direction;

A first accommodating cavity is defined between the first air duct cover and the back wall of the inner bladder of the first storage compartment;

A second accommodating cavity is defined between the second air duct cover and the rear wall of the inner bladder of the second storage compartment.

Optionally, a damper is provided in the air supply air duct to control the flow rate of the airflow after heat exchange by the evaporator entering the second storage compartment; wherein

The refrigerator is also configured to:

When the compartment temperature of the second storage compartment is greater than or equal to the first preset temperature threshold, the damper is opened and the Stirling refrigerator stops running, so as to use the vapor compression refrigeration system alone to provide cooling for the second storage compartment;

When the compartment temperature of the second storage compartment is lower than the first preset temperature threshold, the damper is closed and the Stirling refrigerator is operated, so as to use the Stirling refrigeration system alone to provide cooling for the second storage compartment.

Optionally, the refrigerator is further configured to: when the operation quick-freezing mode is satisfied, the damper is opened and the Stirling refrigerator is operated, so as to provide cooling for the second storage compartment by using the vapor compression refrigeration system and the Stirling refrigeration system at the same time.

Optionally, the conditions for running the quick freezing mode include:

Received a command to turn on the Super Freeze mode; and/or

When the target temperature of the second storage compartment is less than or equal to the second preset temperature threshold, and the temperature of the second storage compartment is still greater than the target temperature of the second storage compartment after the cooling preset time period.

Optionally, a first air supply port is opened on the cover plate of the first air duct, and a first air supply fan is arranged at the first air supply port;

A second air supply port is opened on the cover plate of the second air duct, and a second air supply fan is arranged at the second air supply port;

The refrigerator is further configured to: when the quick freezing mode is running, the duty ratio of the first air supply fan is 100%, and the duty ratio of the second air supply fan is 100%.

Optionally, when the refrigerator is running the quick freezing mode, it is further configured to:

When the target temperature of the second storage compartment is greater than or equal to the first preset temperature threshold, the operating power of the Stirling refrigerator is 50% of the rated power;

When the target temperature of the second storage compartment is lower than the first preset temperature threshold, the operating power of the Stirling refrigerator is 100% of the rated power.

Optionally, when the refrigerator is running the quick freezing mode, it is further configured to:

When the target temperature of the second storage compartment is less than the first preset temperature threshold and the compartment temperature of the second storage compartment is greater than the compartment temperature of the first storage compartment, the operating speed of the compressor of the vapor compression refrigeration system It is the highest speed until the compartment temperature of the second storage compartment is less than or equal to the compartment temperature of the first storage compartment.

Optionally, the front side of the second storage compartment is provided with a double-layer door, and the double-layer door includes an outer door body and an inner door body arranged independently of each other, wherein the inner door body is arranged on the front side of the second storage compartment. ;

The front part of the box body of the second storage compartment is provided with a door frame, one end of the inner door body is connected with the box body, and the other end is detachably connected with the door frame through a mechanical locking mechanism; wherein

The front end face of the door frame is provided with a card slot; the mechanical locking mechanism includes a first structural member, a second structural member, a third structural member and a rotating rod, a card joint is formed on the side end plate of the first structural member, and the first structural member is The structural member is rotatably connected with the side end face of the inner door body through the third structural member and the rotating rod; the second structural member is connected with the door frame and has a protruding portion extending to the card slot; by moving the card joint into the card slot and The inner door body and the door frame are sealed and fixed by matching with the raised part, and the separation of the inner door body and the door frame is realized by moving the card joint out of the card slot.

The refrigerator of the present invention can supply cooling to the second storage compartment by setting both the Stirling refrigeration system and the vapor compression refrigeration system, so that the storage temperature of the second storage compartment is widened, and the refrigerator can be used to refrigerate, freeze or freeze food at ultra-low temperature The vapor compression refrigeration system provides cooling capacity to the second storage compartment by arranging air supply air ducts with two ends respectively connecting the first storage compartment and the second storage compartment. The structure is ingenious and easy to set up.

Further, the refrigerator of the present invention is provided with a damper in the air supply duct, and is configured so that when the temperature of the compartment of the second storage compartment is greater than or equal to the first preset temperature threshold For cooling the second storage compartment, when the temperature of the second storage compartment is lower than the first preset temperature threshold, the Stirling refrigeration system is switched to supply cooling to the second storage compartment alone, which not only improves the overall performance of the storage compartment. The cooling efficiency of the second storage compartment also reduces the energy consumption of the refrigerator and prolongs the service life of the Stirling refrigerator.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

FIG. 1 is a schematic perspective view of some components of a refrigerator according to an embodiment of the present invention.

FIG. 2 is another perspective schematic view of some components of the refrigerator shown in FIG. 1 .

FIG. 3 is a schematic cross-sectional view of some components of the refrigerator shown in FIG. 1 .

FIG. 4 is another schematic cross-sectional view of part of the refrigerator along the line A-A in FIG. 3 .

FIG. 5 is a partially exploded exploded view of the double door and door frame of the refrigerator shown in FIG. 1 .

FIG. 6 is a partial enlarged schematic view of FIG. 5 .

FIG. 7 is a block diagram showing the configuration of the controller of the refrigerator shown in FIG. 1 .

FIG. 8 is a schematic flowchart of a control method of the refrigerator shown in FIG. 1 .

FIG. 9 is a schematic flowchart of the control method of the refrigerator shown in FIG. 1 .

Detailed ways

In the following description, the orientations or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", etc. are orientations based on the refrigerator 100 itself as a reference. "Right" is the direction indicated in FIG. 1 .

FIG. 1 is a schematic perspective view of some components of a refrigerator 100 according to an embodiment of the present invention. FIG. 2 is another schematic perspective view of some components of the refrigerator 100 shown in FIG. 1 . FIG. 3 is a schematic cross-sectional view of some components of the refrigerator 100 shown in FIG. 1 . FIG. 4 is another schematic cross-sectional view of some components of the refrigerator 100 along the line A-A in FIG. 3 . FIG. 5 is a partially exploded exploded schematic view of the double door and the door frame of the refrigerator 100 shown in FIG. 1 . FIG. 6 is a partial enlarged schematic view of FIG. 5 . FIG. 7 is a block diagram showing the configuration of the controller of the refrigerator 100 shown in FIG. 1 . FIG. 8 is a schematic flowchart of a control method of the refrigerator 100 shown in FIG. 1 . FIG. 9 is a schematic flowchart of a control method of the refrigerator 100 shown in FIG. 1 .

The refrigerator 100 in the embodiment of the present invention may generally include: a box body 101 , a vapor compression refrigeration system, a Stirling refrigeration system, and an air supply duct 120 . A first storage compartment 111 and a second storage compartment 112 are defined in the box body 101 . The vapor compression refrigeration system includes an evaporator 201 , and the evaporator 201 is disposed in the first storage compartment 111 . The Stirling refrigeration system is configured to provide cooling to the second storage compartment 112 . The air supply duct 120 is configured so that both ends are connected to the first storage compartment 111 and the second storage compartment 112 respectively, so that the airflow after heat exchange by the evaporator 201 can be transported to the second storage compartment through the air supply air duct 120 . The second storage compartment 112 is cooled by the vapor compression refrigeration system. By arranging the air supply duct 120, the second storage compartment 112 of the refrigerator 100 according to the embodiment of the present invention can be cooled by one or both of the Stirling refrigeration system and the vapor compression refrigeration system. That is to say, the second storage compartment 112 of the refrigerator 100 according to the embodiment of the present invention has three cooling modes, the first is to use only the Stirling refrigeration system for refrigeration, the second is to use only the vapor compression refrigeration system for refrigeration, the The three are the use of Stirling refrigeration system and vapor compression refrigeration system at the same time, and the two refrigeration systems can complement each other. In this way, the storage temperature range of the second storage compartment 112 can be further widened, so that the storage temperature of the second storage compartment 112 can be changed in a wide temperature range from 4°C to -80°C, and refrigeration, freezing and ultra-low temperature freezing can be realized. Three functions.

The refrigerator 100 of the embodiment of the present invention can supply cooling to the second storage compartment 112 by setting both the Stirling refrigeration system and the vapor compression refrigeration system, so that the storage temperature of the second storage compartment 112 is widened, which can be used for refrigeration, Frozen or ultra-low temperature frozen food; by setting the air supply air duct 120 connecting the first storage compartment 111 and the second storage compartment 112 at both ends respectively, the vapor compression refrigeration system can provide cooling capacity to the second storage compartment 112 , the structure is ingenious and easy to install. At the same time, because the evaporator 201 of the vapor compression refrigeration system is not arranged in the second storage compartment 112, the problem of refrigerant accumulation in the vapor compression refrigeration system in the ultra-low temperature environment is solved.

The box body 101 may include an outer shell, an inner container disposed in the outer shell, and a thermal insulation layer disposed between the outer shell and the inner container. The liner defines a storage compartment. The first storage compartment 111 may be one or more, and the second storage compartment 112 may be one or more. It can be understood that the first storage compartment 111 and the second storage compartment 112 are relative terms. In this paper, the storage compartment provided with the evaporator 201 and independently utilizing the vapor compression refrigeration system to provide cooling capacity is referred to as The first storage compartment 111, the storage compartment that is not provided with the evaporator 201 but can use the vapor compression refrigeration system and the Stirling refrigeration system to provide cooling capacity is called the second storage compartment 112, also called deep Cold room. One or more third storage compartments 113 may also be defined in the box body 101 , which are defined as storage compartments that are not provided with the evaporator 201 and use the vapor compression refrigeration system alone to provide cooling capacity. As shown in FIG. 1 , the refrigerator 100 is a cross-door refrigerator, wherein the upper left side of the lower part is a second storage compartment 112 which is a cryogenic compartment; The right side is the first storage compartment 111 is the freezer compartment. A second air supply duct 161 is disposed between the third storage compartment 113 and the first storage compartment 111 , so as to provide cooling capacity to the third storage compartment 113 by using a vapor compression refrigeration system.

In some embodiments, a damper 123 is provided in the air supply air duct 120 to control the flow rate of the airflow after heat exchange by the evaporator 201 entering the second storage compartment 112 . By arranging the damper 123 , the on-off of the refrigeration of the second storage compartment 112 by the vapor compression refrigeration system can be controlled simply and effectively.

The Stirling refrigeration system includes a Stirling refrigerator 300 and a heat exchanger 305 . The Stirling refrigerator 300 is disposed outside the second storage compartment 112 and exchanges heat with heat exchangers disposed in the second storage compartment 112 The device 305 is thermally connected, so that the second storage compartment 112 can be cooled by using the Stirling refrigeration system. As shown in FIGS. 3 and 4 , in some embodiments, a first air duct cover 131 is provided inside the inner container of the first storage compartment 111 , and the first air duct cover 131 is connected to the first storage compartment. A first accommodating cavity 141 is defined between the inner pots of 111 , and the evaporator 201 is arranged in the first accommodating cavity 141 . A second air duct cover 132 is disposed on the inner side of the inner container of the second storage compartment 112 , and a second accommodating cavity 142 is defined between the second air duct cover 132 and the inner container of the second storage compartment 112 . The exchanger 305 is arranged in the second accommodating cavity 142 . One end of the air supply duct 120 is communicated with the first accommodating cavity 141 , and the other end is communicated with the second accommodating cavity 142 . The inlet 121 and the outlet 122 of the air supply duct 120 are shown in FIGS. 3 and 4 . By connecting the two ends of the air supply duct 120 to the first accommodating cavity 141 and the second accommodating cavity 142 respectively, the vapor compression refrigeration system and the Stirling refrigeration system can share one set of cooling for the second storage compartment 112 The air supply port 170 simplifies the structure and arrangement, and at the same time enables the cold air exchanged by the vapor compression refrigeration system to be pre-mixed with the cold air exchanged by the Stirling refrigeration system, and then flows out of the air supply port of the second storage compartment 112 170, so that the temperature of the airflow flowing out of the air supply port 170 is kept basically stable, which is more conducive to the control of the temperature of the second storage compartment 112 and the storage of items.

In some preferred embodiments, the first storage compartment 111 and the second storage compartment 112 are arranged side by side along the lateral direction; A first accommodating cavity 141 is defined; a second accommodating cavity 142 is defined between the second air duct cover 132 and the inner wall of the second storage compartment 112 . The first storage compartment 111 and the second storage compartment 112 are arranged side by side, and both are provided with accommodating chambers near the rear wall of the inner tank, which makes the setting of the air supply duct 120 more convenient, and can shorten the air supply air duct. The length of 120 can further shorten the distance of air supply from the first storage compartment 111 to the second storage compartment 112 , so that the cooling energy can be efficiently transferred to the second storage compartment 112 . As shown in FIG. 4 , the inlet 121 of the air supply air duct 120 is higher than the outlet 122 side, so that the air supply air duct 120 is inclined as a whole, which is more conducive to the flow of cold air. Meanwhile, as shown in FIG. 2 , a device chamber 102 is defined at the bottom of the rear side of the case 101 . The Stirling refrigerator 300, the compressor 202 and the condenser 203 of the vapor compression refrigeration system are arranged in the device room 102 in sequence in the lateral direction, wherein the Stirling refrigerator 300 is disposed corresponding to the second storage compartment 112, The distance between the heat exchanger 305 and the Stirling refrigerator 300 and the distance between the evaporator 201 and the compressor 202 can also be shortened by arranging the first accommodating cavity 141 and the second accommodating cavity 142 near the rear wall of the inner container, and further Improve cooling efficiency. In addition, a cooling fan 204 may also be provided between the compressor 202 and the condenser 203 to facilitate the flow of air in the device chamber 102 to facilitate heat dissipation.

In some embodiments, the first air duct cover plate 131 is provided with a first air supply port, and the first air supply port is provided with a first air supply fan 151; the second air duct cover plate 132 is provided with a second air supply port, A second air blower 152 is disposed at the second air supply port. The first air blower 151 can promote the airflow in the first accommodating cavity 141 to flow outward, and the second air blower 152 can promote the air flow in the second accommodating cavity 142 to flow outward.

The refrigerator 100 according to the embodiment of the present invention further includes: a return air duct 160, the two ends of which are respectively connected to the storage area of the second storage compartment 112 and the first accommodation cavity 141, so that the second storage compartment 112 is The airflow in the storage area flows back into the first accommodating cavity 141 through the return air duct 160 . As shown in FIG. 2 to FIG. 4 , the side wall of the second storage compartment 112 close to the first storage compartment 111 is provided with a second air return port 172 , and one end of the air return air duct 160 is connected to the second air return port 172 connected, and the other end is connected to the first accommodating cavity 141 . The return air duct 160 is also connected to the air return port of the third storage compartment 113 , so that the airflow in the storage area of the third storage compartment 113 flows back into the first accommodating cavity 141 through the return air duct 160 .

In some embodiments, the Stirling refrigerator 300 according to the embodiment of the present invention includes a casing 301 , a cylinder, a piston, and a driving mechanism. The casing 301 includes a main body portion 311 and a cylindrical portion 312 , and the piston is configured to be in the cylindrical portion 312 . The inner reciprocating movement causes the cold end of the Stirling refrigerator 300 to be formed at the end of the cylindrical portion 312 , the hot end of the Stirling refrigerator 300 is formed at the junction of the cylindrical portion 312 and the main body portion 311 ; An opening is provided on the side wall of the main body 311 , a cooling fan 313 is provided at the opening, and a finned radiator 314 is also provided on the side of the main body portion 311 where the cylindrical portion 312 is provided. As shown in FIG. 2 , ventilation openings 103 are opened on the left and right sides of the device chamber 102 , and the cooling fan 313 is disposed facing the adjacent ventilation openings 103 . By opening the side wall of the main body portion 311 and disposing the cooling fan 313, the heat dissipation of the main body portion 311 can be facilitated, and arranging the cooling fan 313 facing the adjacent ventilation port 103 can promote the flow of airflow and further improve the heat dissipation efficiency; By disposing the finned radiator 314 at the junction of the main body portion 311 and the cylindrical portion 312, the heat dissipation of the hot end of the Stirling refrigerator 300 can be facilitated, and the structure is simple and easy to assemble. Continuing to refer to FIG. 2 , the cold end of the Stirling refrigerator 300 is disposed upward, which can shorten the distance between the Stirling refrigerator 300 and the heat exchanger 305 . The Stirling refrigerator 300 may be secured within the device chamber 102 by means of springs, shock-absorbing mounts, and the like.

The Stirling refrigeration system according to the embodiment of the present invention further includes a cooling device 303. The cooling device 303 includes a cold end adapter 331 and a cold and heat pipe 332. The cold end adapter 331 is thermally connected to the cold end of the Stirling refrigerator 300. One end of the cold and heat pipe 332 is thermally connected to the cold end adapter 331 , and the other end is thermally connected to the heat exchanger 305 . In addition, a heat preservation member 307 is also provided at the cold end of the Stirling refrigerator 300 and the part of the cooling device 303 . As shown in FIGS. 3 and 4 , the lower part of the cold end adapter 331 wraps the cold end of the Stirling refrigerator 300 . One end of the plurality of cold and heat conducting pipes 332 is inserted into the pipe hole of the cold end adapter 331 , and the other end is inserted into the heat exchanger 305 . Continuing to refer to FIGS. 3 and 4 , the heat exchanger 305 includes a cold-conducting plate 351 and a plurality of cooling-conducting fins 352 arranged at intervals. The plurality of cooling-conducting fins 352 are formed to extend forward from the front surface of the cold-conducting plate 351 . Air flow channels are defined between adjacent cooling fins 352 . The other end of a part of the cooling and heat conducting pipes 332 is inserted into the cold conducting plate 351 , and the other end of the other part of the cooling and heat conducting pipes 332 is inserted into one or more cooling fins 352 . In the refrigerator 100 according to the embodiment of the present invention, by setting the heat exchanger 305 to include a cold-conducting plate 351 and a plurality of cooling-conducting fins 352 arranged at intervals, large-area heat exchange can be achieved, and heat exchange efficiency can be improved. As shown in FIG. 3 , the upper part of the second air duct cover 132 is provided with an air supply port 170 , and the lower part is provided with a first air return port 171 . The airflow of the second accommodating cavity 142 passes through the heat exchanger 305 from bottom to top, thereby forming a structure of lower return air and upper air outlet in the second storage compartment 112 .

As shown in FIGS. 5 and 6 , in some embodiments, a double door 400 is provided on the front side of the second storage compartment 112 of the refrigerator 100 to enhance the heat preservation effect of the refrigerator 100 . The double door 400 includes an outer door body 401 and an inner door body 402; the inner door body 402 is located on the inner side of the outer door body 401 and is arranged on the front side of the second storage compartment 112 for opening and closing the second storage compartment 112; and the outer door body 401 and the inner door body 402 are arranged independently of each other, so that the inner door body 402 remains closed when the outer door body 401 is opened outward. As shown in FIG. 1 and FIG. 5 , when the second storage compartment 112 and the third storage compartment 113 share the same outer door body 401 , the double door 400 is arranged to include an outer door body 401 and an inner door that are independent of each other. body 402, and the size of the outer door body 401 is larger than the size of the inner door body 402, the third storage compartment 113 is opened and closed by the outer door body 401, so that when the user takes items from the third storage compartment 113, they are outside When the door body 401 is open, the inner door body 402 can be kept in a closed state, that is, the second storage compartment 112 is still sealed, which can effectively reduce cold leakage. The distance between the inner door body 402 and the outer door body 401 is not more than 5 mm. If the distance is too large, the risk of frost formation is high. In addition, the outer surface of the inner door body 402 may also be provided with a heating wire, and the heating wire may be turned on intermittently or according to conditions. At the same time, in order to ensure that the outside of the inner door body 402 is not frosted, a vacuum heat insulation board may also be arranged inside the inner door body 402, so that the temperature of the outer surface of the inner door body 402 is greater than 0°C. In order to overcome the negative pressure problem of the second storage compartment 112 , a pressure balance hole may be opened on the door seal of the inner door body 402 to ensure that the inner door body 402 can be opened smoothly.

The refrigerator 100 of the embodiment of the present invention further includes: a door frame 430 and a mechanical locking mechanism. The door frame 430 is disposed at the front of the box body 101 of the second storage compartment 112 . One end of the inner door body 402 is connected to the box body 101 , and the other end is detachably connected to the door frame 430 through a mechanical locking mechanism. By arranging an independent door frame 430 at the front of the box body 101 of the second storage compartment 112 , the inner door body 402 can be embedded in the box body 101 . A sealing strip is provided between the inner door body 402 and the door frame 430 . Specifically, in order to ensure the tightness of the inner door body 402, a sealing strip is provided on the mating surface of the inner door body 402 and the door frame 430, and a sealing strip is also provided on the convex part of the inner door body 402, that is, a double door seal , the gap between the inner door body 402 and the door frame 430 is narrowed. Meanwhile, in order to prevent cold leakage, a sealing strip may also be provided between the inner door body 402 and the third storage compartment 113 . In some embodiments, the inner door body 402 and the box body 101 may be connected by at least two hinges 450 . By connecting the inner door body 402 and the box body 101 with the hinge 450, it can be ensured that the angle of the inner door body 402 when opened reaches 90°. In the embodiment shown in FIG. 5 , the inner door body 402 and the box body 101 are connected by two hinges 450 .

In some embodiments, the front end surface of the door frame 430 is provided with a card slot 431 . The mechanical locking mechanism includes a first structural member 501, a second structural member 502, a third structural member 503 and a rotating rod 504, wherein a snap joint 5121 is formed on the side end plate 512 of the first structural member 501, and the first structural member 501 is rotatably connected to the side end face of the inner door body 402 through a third structural member 503 and a rotating rod 504 ; The inner door body 402 and the door frame 430 are sealed and fixed by moving the card joint 5121 into the card slot 431 and fitting with the protrusion 521 , and the inner door body 402 and the door frame 430 are realized by moving the card joint 5121 out of the card slot 431 separation. By arranging the card slot 431 on the door frame 430, the fixing and separation of the inner door body 402 and the door frame 430 are realized by using the card joint 5121 of the mechanical locking mechanism, that is, the closing and opening of the inner door body 402 are realized, and the structure is ingenious and convenient. manipulation. Referring to FIG. 6 , the first structural member 501 includes a front end plate 511 and a side end plate 512 . The side end plate 512 is provided with a through hole matching the first rod portion (not shown in the figure) of the rotating rod 504 . The third structural member 503 includes a front end plate and a side end plate. The side end plate is fixed to the inner door body 402 by two mounting holes and a fixing member 530, and the two mounting holes correspond to the through holes of the first structural member 501. There is also a through hole for the rotating rod 504 to pass through, and the through hole of the third structural member 503 is matched with the second rod portion (not shown in the figure) of the rotating rod 504 . And the outer diameter of the first rod portion of the rotating rod 504 is larger than the outer diameter of the second rod portion, that is to say, the outer diameter of the contact area between the rotating rod 504 and the first structural member 501 is larger than the contact area between the rotating rod 504 and the third structural member 503 so that the first structural member 501 can not only remain connected with the inner door body 402 but also rotate. In addition, in order to make the installation of the third structural member 503 and the inner door body 402 more stable, a gasket may be provided under the side end plate of the third structural member 503 . In the embodiment shown in FIG. 6 , the first structural member 501 rotates in the front-rear direction, the snap joint 5121 is formed to extend downward and backward, and the second structural member 502 has a flat plate portion provided with mounting holes and extends upward from the flat plate portion. the raised portion 521. It can be understood that, the first structural member 501 can also be rotated in the up-down direction. At this time, the card slot 431 can be opened in the left-right direction, and the raised portion 521 can be extended to the left or right. In some embodiments, a concave portion 421 is formed on the front surface of the inner door body 402 ; the front plate 511 of the first structural member 501 extends into the concave portion 421 , and an indicator 422 is disposed on the front side. The part of the front end plate 511 of the first structural member 501 in the recessed part 421 can be used as a handle, which is convenient for the user to operate, and the indication board 422 can remind the user of the operation direction and improve the user experience.

7 to 9, the control method part of the refrigerator 100 according to the embodiment of the present invention will be described in detail. As shown in FIG. 7 , the controller 600 of the refrigerator 100 according to the embodiment of the present invention may include a processor 601 and a memory 602 . The memory 602 stores a computer program 620, and the computer program 620 is used to implement the control method of the refrigerator 100 according to the embodiment of the present invention when the computer program 620 is executed by the processor 601.

In some embodiments, the refrigerator 100 of the embodiment of the present invention is further configured to: when the compartment temperature of the second storage compartment 112 is greater than or equal to the first preset temperature threshold, the damper 123 is opened, and the Stirling refrigerator 300 stops running , so as to use the vapor compression refrigeration system alone to provide cooling for the second storage compartment 112; when the compartment temperature of the second storage compartment 112 is lower than the first preset temperature threshold, the damper 123 is closed and the Stirling refrigerator 300 operates , so that the second storage compartment 112 is cooled by using the Stirling refrigeration system alone. The refrigerator 100 according to the embodiment of the present invention is provided with a damper 123 in the air supply duct 120, and is configured so that when the temperature of the compartment of the second storage compartment 112 is greater than or equal to the first preset temperature threshold The second storage compartment 112 provides cooling, and when the compartment temperature of the second storage compartment 112 is lower than the first preset temperature threshold, the Stirling refrigeration system is switched to supply cooling to the second storage compartment 112 alone, not only The cooling efficiency to the second storage compartment 112 is improved as a whole, the energy consumption of the refrigerator 100 is also reduced, and the service life of the Stirling refrigerator 300 is prolonged. The first preset temperature threshold may be greater than the minimum refrigeration temperature of the vapor compression refrigeration system, for example, the minimum refrigeration temperature of the vapor compression refrigeration system is -40°C, and the first preset temperature threshold may be -25°C.

Referring to FIG. 8 , the control method of the refrigerator 100 according to the embodiment of the present invention includes the following steps:

S102: Obtain the compartment temperature of the second storage compartment 112;

S104: Determine whether the compartment temperature of the second storage compartment 112 is greater than or equal to a first preset temperature threshold;

S106: If the determination result of step S104 is yes, control the damper 123 to open, and stop the operation of the Stirling refrigerator 300, so as to use the vapor compression refrigeration system alone to provide cooling for the second storage compartment 112;

S108: If the determination result of step S104 is NO, control the damper 123 to close and the Stirling refrigerator 300 to operate, so as to use the Stirling refrigeration system alone to provide cooling for the second storage compartment 112.

The refrigerator 100 according to the embodiment of the present invention may intermittently obtain the compartment temperatures of a plurality of second storage compartments 112, and respectively perform the judgment in step S104, and select a cooling mode according to the latest judgment result after each judgment, so as to realize the refrigerating system and the The room temperature can be matched to effectively reduce energy consumption.

In some embodiments, the refrigerator 100 of the embodiment of the present invention is further configured to: when the quick freezing mode is satisfied, the damper 123 is opened and the Stirling refrigerator 300 is operated, so as to utilize the vapor compression refrigeration system and the Stirling refrigeration system as the first The second storage compartment 112 provides cooling. The refrigerator 100 according to the embodiment of the present invention is configured so that the vapor compression refrigeration system and the Stirling refrigeration system simultaneously supply cooling to the second storage compartment 112 when the operation quick-freezing mode is satisfied, so that the refrigeration efficiency is high, and the second storage compartment can be stored The ingredients in the compartment 112 are quickly frozen to the target temperature expected by the user, which improves the user experience.

The conditions for running the quick-freezing mode include: receiving an instruction to turn on the quick-freezing mode; and/or when the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold, and the second storage compartment is cooled for a preset period of time The compartment temperature of 112 is still greater than the target temperature of the second storage compartment 112 .

The user can make the refrigerator 100 enter the quick-freezing mode by inputting an instruction to turn on the quick-freezing mode through touch input or voice input.

Since the second storage compartment 112 of the refrigerator 100 according to the embodiment of the present invention can be set to a wide range of storage temperature, and the general cooling mode is to use the vapor compression refrigeration system alone to supply cooling to the second storage compartment 112 or use it alone The Stirling refrigeration system supplies cooling to the second storage compartment 112 , and there is a problem that the cooling rate of the second storage compartment 112 is too slow. It may be that after cooling for a period of time, the compartment temperature of the second storage compartment 112 is still greater than the target temperature of the second storage compartment 112 . Therefore, the refrigerator 100 according to the embodiment of the present invention is further configured as a compartment of the second storage compartment 112 after the target temperature of the second storage compartment 112 is less than or equal to the second preset temperature threshold and a preset cooling time period is satisfied. When the temperature is still higher than the target temperature of the second storage compartment 112 , the quick-freezing mode is forced to run, thereby effectively increasing the cooling speed of the second storage compartment 112 . The target temperature of the second storage compartment 112 may be the storage temperature input by the user or the default storage temperature of the currently stored items by the system.

In particular, when the vapor compression refrigeration system is used alone to supply cooling to the second storage compartment 112, it is determined whether the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold and after a preset cooling time period Whether the compartment temperature of the second storage compartment 112 is still greater than the target temperature of the second storage compartment 112 . This is due to the fact that the cooling rate of the second storage compartment 112 by using the vapor compression refrigeration system alone is more likely to be too slow compared with the use of the Stirling refrigeration system alone to supply the cooling to the second storage compartment 112 That is, the control of forced operation of quick-freezing mode is added to the cooling mode operation in which the vapor compression refrigeration system is used alone to supply cooling to the second storage compartment 112 . The second preset temperature threshold is generally greater than the first preset temperature threshold. As exemplified above, the first preset temperature threshold may be -25°C, and the second preset temperature threshold may be -20°C. The preset time period is preferably 20min-2h, such as 20min, 35min, 1.5h, etc., to cool the second storage compartment 112 for a period of time but not too long by using the current cooling mode.

Referring to FIG. 9 , the control method of the refrigerator 100 according to the embodiment of the present invention includes the following steps:

S202: the refrigerator 100 is in a cooling mode in which the vapor compression refrigeration system is used alone to supply cooling to the second storage compartment 112;

S204: Determine whether the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold;

If the determination result of step S204 is no, step S202 is executed, and the refrigerator 100 maintains the current cooling mode.

S206: if the determination result of step S204 is yes, continue to run the current refrigeration mode preset time period;

S208: After completing step S206, determine whether the compartment temperature of the second storage compartment 112 is greater than the target temperature of the second storage compartment 112;

If the determination result of step S208 is no, step S202 is executed, and the refrigerator 100 maintains the current cooling mode.

S210: If the determination result of step S208 is yes, the quick freezing mode is operated, the damper 123 is controlled to open, the Stirling refrigerator 300 is operated, and the vapor compression refrigeration system and the Stirling refrigeration system are used to supply the second storage compartment 112 at the same time. cold.

In addition, the control method of the refrigerator 100 according to the embodiment of the present invention further includes: S212 : receiving an instruction to turn on the quick-freezing mode; and then performing step S210 .

For example, it is assumed that the target temperature of the second storage compartment 112 is -35°C, the first preset temperature threshold is -25°C, the second preset temperature threshold is -20°C, and the preset time period is 1 hour. Assuming that the initially acquired compartment temperature of the second storage compartment 112 (referred to as the first compartment temperature) is -10°C, since the first compartment temperature -10°C is greater than the first preset temperature threshold of -25°C, control the damper 123 is turned on, the Stirling refrigerator 300 is stopped, and the second storage compartment 112 is cooled by the vapor compression refrigeration system alone. The target temperature of the second storage compartment 112 -35°C is lower than the second preset temperature threshold -20°C. It is assumed that the temperature of the second storage compartment 112 obtained again (referred to as the temperature of the second compartment) is -22°C after continuing to cool for 1 hour, and the temperature of the second compartment -22°C is greater than that of the second storage compartment 112 The target temperature is -35°C. At this time, the quick-freezing mode is forced to operate, the damper 123 is controlled to open, the Stirling refrigerator 300 is operated, and the second storage compartment 112 is cooled by the vapor compression refrigeration system and the Stirling refrigeration system. Until the compartment temperature of the second storage compartment 112 is less than or equal to -35°C.

In some embodiments, the refrigerator 100 of the embodiment of the present invention is further configured to: when the quick-freezing mode is operated, the duty ratio of the first blower fan 151 (ie the ratio of the working speed to the rated speed) is 100%, and the second blower The duty cycle of the fan 152 is 100%. By controlling both the first air blower 151 and the second air blower 152 to work at a duty ratio of 100%, the overall cooling efficiency can be further improved, and it is avoided that the cooling capacity is too concentrated and the first air blower 151 and the second air blower 151 are reduced. The service life of the blower fan 152.

In some embodiments, when the refrigerator 100 of the embodiment of the present invention is operating in the quick freezing mode, it is further configured to: when the target temperature of the second storage compartment 112 is greater than or equal to the first preset temperature threshold, the Stirling refrigerator 300 The operating power of the Stirling refrigerator 300 is 50% of the rated power; when the target temperature of the second storage compartment 112 is lower than the first preset temperature threshold, the operating power of the Stirling refrigerator 300 is 100% of the rated power. By controlling the operating power of the Stirling refrigerator 300 in the quick freezing mode by situation, it is possible to reduce energy consumption and save energy as much as possible while ensuring refrigeration efficiency.

In some embodiments, when the refrigerator 100 of the embodiment of the present invention is operating in the quick freezing mode, it is further configured to: when the target temperature of the second storage compartment 112 is lower than the first preset temperature threshold and the second storage compartment 112 The temperature of the compartment is greater than that of the first storage compartment 111, and the compressor 202 of the vapor compression refrigeration system operates at the highest speed until the compartment temperature of the second storage compartment 112 is less than or equal to the first storage compartment. The compartment temperature of the chamber 111. By controlling the compressor under the condition that the target temperature of the second storage compartment 112 is less than the first preset temperature threshold and the compartment temperature of the second storage compartment 112 is greater than the compartment temperature of the first storage compartment 111 202 runs at the highest speed, which can improve the overall refrigeration efficiency of the refrigerator 100, and at the same time, after the compartment temperature of the second storage compartment 112 is less than or equal to the compartment temperature of the first storage compartment 111, the compressor 202 is controlled to no longer keep The maximum rotation speed can avoid the problem that the service life of the compressor 202 may be shortened due to the high heat dissipation pressure caused by the continuous maximum rotation speed.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. a refrigerator, is characterized in that comprising: a box body, which defines a first storage compartment and a second storage compartment; a vapor compression refrigeration system, including an evaporator, the evaporator is arranged in the first storage compartment; a Stirling refrigeration system configured to provide cooling to the second storage compartment; and The air supply air duct is configured to connect the first storage compartment and the second storage compartment at both ends, so that the airflow after heat exchange by the evaporator can be transported through the air supply air duct into the second storage compartment, so that the vapor compression refrigeration system is used to supply cooling to the second storage compartment. 2. The refrigerator according to claim 1, characterized in that, the Stirling refrigeration system includes a Stirling refrigerator and a heat exchanger, the heat exchanger being thermally connected to the cold end of the Stirling refrigerator; and A first air duct cover plate is arranged on the inner side of the inner container of the first storage compartment, and a first accommodating cavity is defined between the first air channel cover plate and the inner container of the first storage compartment, the evaporator is arranged in the first accommodating cavity; A second air duct cover plate is arranged on the inner side of the inner container of the second storage compartment, and a second accommodating cavity is defined between the second air channel cover plate and the inner container of the second storage compartment, the heat exchanger is arranged in the second accommodating cavity; One end of the air supply duct is communicated with the first accommodating cavity, and the other end is communicated with the second accommodating cavity. 3. The refrigerator according to claim 2, wherein The first storage compartment and the second storage compartment are arranged side by side along the lateral direction; The first accommodating cavity is defined between the first air duct cover and the inner wall of the first storage compartment; The second accommodating cavity is defined between the second air duct cover and the rear wall of the inner bladder of the second storage compartment. 4. The refrigerator according to claim 2, characterized in that, A damper is arranged in the air supply air duct to control the flow rate of the air flow that enters the second storage compartment after being heat-exchanged by the evaporator; wherein The refrigerator is also configured to: When the compartment temperature of the second storage compartment is greater than or equal to a first preset temperature threshold, the damper is opened, and the Stirling refrigerator is stopped, so that the vapor compression refrigeration system is solely used for the first storage compartment. Two storage rooms for cooling; When the compartment temperature of the second storage compartment is lower than the first preset temperature threshold, the damper is closed and the Stirling refrigerator is operated, so as to use the Stirling refrigeration system alone for the The second storage room provides cooling. 5. The refrigerator according to claim 4, characterized in that, further configured to: When the operation quick freezing mode is satisfied, the damper is opened and the Stirling refrigerator is operated to provide cooling for the second storage compartment using the vapor compression refrigeration system and the Stirling refrigeration system at the same time. 6. The refrigerator according to claim 5, characterized in that, The conditions for operating the quick freezing mode include: Received a command to turn on the Super Freeze mode; and/or When the target temperature of the second storage compartment is less than or equal to the second preset temperature threshold, and the temperature of the second storage compartment is still higher than that of the second storage compartment after a preset cooling time period target temperature. 7. The refrigerator according to claim 5, characterized in that, A first air supply port is opened on the cover plate of the first air duct, and a first air supply fan is arranged at the first air supply port; A second air supply port is opened on the cover plate of the second air duct, and a second air supply fan is arranged at the second air supply port; The refrigerator is further configured to: when the quick freezing mode is operated, the duty ratio of the first air blower is 100%, and the duty cycle of the second air blower is 100%. 8 . The refrigerator according to claim 5 , wherein, when the refrigerator is running the quick-freezing mode, it is further configured to: When the target temperature of the second storage compartment is greater than or equal to the first preset temperature threshold, the operating power of the Stirling refrigerator is 50% of the rated power; When the target temperature of the second storage compartment is lower than the first preset temperature threshold, the operating power of the Stirling refrigerator is 100% of the rated power. 9 . The refrigerator according to claim 5 , wherein when the refrigerator operates the quick freezing mode, the refrigerator is further configured to: 10 . When the target temperature of the second storage compartment is less than the first preset temperature threshold and the compartment temperature of the second storage compartment is greater than the compartment temperature of the first storage compartment, the The operating speed of the compressor of the vapor compression refrigeration system is the highest speed until the temperature of the compartment of the second storage compartment is less than or equal to the temperature of the compartment of the first storage compartment. 10. The refrigerator according to claim 1, characterized in that, The front side of the second storage room is provided with a double-layer door, and the double-layer door includes an outer door body and an inner door body which are arranged independently of each other, wherein the inner door body is arranged in the second storage room the front side of the chamber; The front part of the box body of the second storage compartment is provided with a door frame, one end of the inner door body is connected with the box body, and the other end is detachable from the door frame through a mechanical locking mechanism connection; in which The front end surface of the door frame is provided with a card slot; the mechanical locking mechanism includes a first structural member, a second structural member, a third structural member and a rotating rod, and a side end plate of the first structural member is formed with a snap joint, and the first structural member is rotatably connected to the side end face of the inner door body through the third structural member and the rotating rod; the second structural member is connected to the door frame and has A raised portion extending to the card slot; by moving the card joint into the card slot and fitting with the raised portion, the inner door body and the door frame are sealed and fixed, and the inner door body and the door frame are sealed and fixed by The card joint is moved out of the card slot to realize the separation of the inner door body and the door frame.

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