CN214276204U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, include: the refrigerator comprises a box body and a deep cooling inner container, wherein a deep cooling chamber is limited in the deep cooling inner container; the Stirling refrigeration system comprises a Stirling refrigerator and a cold conducting plate, and the cold end of the Stirling refrigerator is thermally connected with the cold conducting plate; wherein the cold guide plate is attached to the outer side of the cryogenic inner container to realize that the Stirling refrigerating system provides cold for the cryogenic chamber. The utility model discloses a refrigerator need not to change the structure of current storing compartment for manufacturing process simplifies, and the assembly is simple.

Description

Refrigerator with a door

Technical Field

The utility model relates to a refrigeration field especially relates to a refrigerator.

Background

Most of the existing household refrigerators adopt a vapor compression mode for refrigeration, and the temperature in the refrigerator is difficult to reach below minus 30 ℃. The Stirling refrigerating system is adopted for refrigeration in the fields of spaceflight, medical treatment and the like, and the refrigerating temperature of the system can be below 200 ℃ below zero. When the existing refrigerator adopts the Stirling refrigerating system, part of components of the Stirling refrigerating system are introduced into the storage chamber to realize cold supply, and the structure of the storage chamber needs to be greatly changed, so that the problem of complex process flow is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome at least one defect of prior art, provide an adoption stirling refrigerating system refrigerated refrigerator that storing compartment structure need not to change almost.

A further object of the present invention is to provide a refrigerator using stirling refrigerating system with high efficiency of cold transfer.

Particularly, the utility model provides a refrigerator, include:

the refrigerator comprises a box body and a deep cooling inner container, wherein a deep cooling chamber is limited in the deep cooling inner container; and

the Stirling refrigeration system comprises a Stirling refrigerator and a cold guide plate, wherein the cold end of the Stirling refrigerator is thermally connected with the cold guide plate; wherein

The cold guide plate is arranged close to the outer side of the cryogenic inner container so as to realize that the Stirling refrigerating system provides cold for the cryogenic chamber.

Optionally, the stirling refrigeration system further comprises: lead cold charge and put, lead cold charge and put including cold junction adapter and a plurality of cold heat pipe of leading, cold junction adapter and cold junction fixed thermal connection, a plurality of one ends and the cold junction adapter thermal connection of leading cold heat pipe, the other end with lead cold plate thermal connection.

Optionally, a plurality of first grooves are formed on the surface of the cold guide plate far away from the deep cooling inner container;

the cold conduction heat pipe is inserted in the first groove.

Optionally, a plurality of second grooves are further formed on the surface of the cold guide plate away from the deep cooling inner container;

the stirling refrigeration system further comprises: the temperature equalizing heat pipe is fixed in the second groove.

Optionally, the second groove is a U-shaped groove; and is

At least a portion of the first groove is formed in the U-shaped central depression of the second groove.

Optionally, the contact part of the cold-conducting heat pipe and the first groove is coated with heat-conducting grease; and/or

And the contact part of the temperature equalizing heat pipe and the second groove is coated with heat conducting grease.

Optionally, a device chamber is defined at the bottom of the rear side of the box body;

the Stirling refrigerator is arranged in the device chamber and is positioned behind the deep cooling inner container;

the cold guide plate is arranged close to the outer side of the rear wall of the deep cooling liner.

Optionally, the refrigerator further comprises:

the air channel cover plate is arranged on the inner side of the rear wall of the deep cooling chamber, a containing cavity is formed between the air channel cover plate and the deep cooling inner container, and an air supply outlet and an air return inlet are formed in the air channel cover plate; and

and the air supply fan is arranged at the air supply port.

Optionally, the refrigerator further comprises: the vapor compression refrigerating system comprises an evaporator, wherein the evaporator is arranged in the accommodating cavity or arranged close to the outer side of the deep cooling inner container, so that the vapor compression refrigerating system can provide cold for the deep cooling chamber.

Optionally, the evaporator is disposed in the accommodating cavity, and a heating pipe is disposed on the evaporator for providing heat required by the evaporator and the cold guide plate for defrosting.

The utility model discloses a refrigerator is through setting stirling refrigerating system including stirling refrigerator and leading the cold plate, will lead the cold plate and paste the outside setting that leans on the cryrogenic inner bag and realize stirling refrigerating system and provide cold volume to cryrogenic room between for whole stirling refrigerating system all sets up between cryrogenic outdoors, need not to change the structure of room between current storing, makes manufacturing process simplify, and assembles simply, has still reduced the conduction of stirling refrigerator's vibration simultaneously, is favorable to the damping to fall and makes an uproar.

Further, the utility model discloses a refrigerator is through leading the surface of keeping away from cryrogenic inner bag at cold plate and forming a plurality of first recesses, will lead cold heat pipe to insert and realize leading cold and hot pipe and lead the fixed hot connection of cold plate in locating first recess, can make and lead cold heat pipe and lead cold plate fully contact, improve coefficient of heat transfer, assembly structure is simple and firm simultaneously.

Further, the utility model discloses a refrigerator is through still being provided with the samming heat pipe on leading the cold drawing, can further strengthen the cold volume transmission efficiency who leads the cold drawing, and then reduces cold volume loss.

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

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a perspective view of a part of components of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a rear view schematically showing part of components of the refrigerator shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of a portion of the components taken along line a-a in fig. 2.

FIG. 4 is a perspective view of the Stirling refrigeration system and cryogenic inner tank of the refrigerator shown in FIG. 1.

Fig. 5 is an exploded view of a cold conducting plate, a cold conducting device and a temperature equalizing heat pipe of the refrigerator shown in fig. 1.

Fig. 6 is an exploded schematic view of a double door and a door frame of the refrigerator shown in fig. 1.

Fig. 7 is a partially enlarged schematic view of fig. 6.

Detailed Description

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, such as the directions indicated in fig. 1.

Fig. 1 is a perspective view of a part of components of a refrigerator 100 according to an embodiment of the present invention. Fig. 2 is a rear view schematically illustrating part of components of the refrigerator 100 shown in fig. 1. Fig. 3 is a schematic cross-sectional view of a portion of the components taken along line a-a in fig. 2. FIG. 4 is a perspective view of the Stirling refrigeration system and cryogenic inner tank 113 of refrigerator 100 shown in FIG. 1. Fig. 5 is an exploded view of the cold guide plate 305, the cold guide 303 and the soaking heat pipe 353 of the refrigerator 100 shown in fig. 1.

The refrigerator 100 of the embodiment of the present invention may generally include: a cabinet 101 and a stirling refrigeration system. The box 101 may include a casing, an inner container disposed in the casing, and a heat insulation layer disposed between the casing and the inner container. The inner container defines a storage compartment, and the refrigerator 100 may include at least one common inner container 114 and at least one cryogenic inner container 113, wherein the common inner container 114 defines a common compartment 111 and the cryogenic inner container 113 defines a cryogenic compartment 112. Herein, the "normal inner container" refers to an inner container other than the deep cooling inner container 113, such as a refrigerating inner container, a freezing inner container, and a temperature changing inner container. Correspondingly, the "ordinary compartment" refers to a non-ultra-low temperature compartment which is not cooled by the stirling refrigerating system and cannot realize ultra-low temperature, such as a conventional refrigerating compartment, a freezing compartment and a temperature-changing compartment, except for the cryogenic compartment 112. Cryogenic compartment 112 refers to a compartment that is cooled using at least a stirling refrigeration system. The preservation temperature of the cold storage chamber can be 2-9 ℃ generally, and the preservation temperature of the freezing chamber can be-20 ℃ to-16 ℃ generally. The temperature-changing chamber can be adjusted according to requirements and used as a refrigerating chamber or a freezing chamber. The storage temperature of the cryogenic compartment 112 may be generally-14 ℃ to-80 ℃. In the refrigerator 100 of the embodiment of the present invention, the stirling refrigerating system is configured to include the stirling refrigerator 300 and the cold guide plate 305, and the cold end of the stirling refrigerator 300 is thermally connected to the cold guide plate 305; wherein cold guide plate 305 is disposed against the outside of cryogenic inner tank 113 to enable the stirling refrigeration system to provide cold to cryogenic compartment 112. The utility model discloses refrigerator 100 is through setting stirling refrigerating system to including stirling refrigerator 300 and leading cold plate 305, to lead cold plate 305 and paste the outside setting that leans on cryrogenic inner bag 113 and realize stirling refrigerating system and provide cold volume to cryrogenic room 112, make whole stirling refrigerating system all set up outside cryrogenic room 112, need not to change the structure of room between current storing, make manufacturing process simplify, and the assembly is simple, the conduction of the vibration of stirling refrigerator 300 has still been reduced simultaneously, be favorable to the damping to fall and make an uproar.

In some embodiments, the stirling refrigeration system of the refrigerator 100 of the embodiment of the present invention further includes: cold guiding device 303, cold guiding device 303 includes cold end adapter 331 and a plurality of cold guiding heat pipe 332, cold end adapter 331 and cold end fixed thermal connection, the one end and the cold end adapter 331 thermal connection of a plurality of cold guiding heat pipe 332, the other end and cold guiding plate 305 thermal connection. As shown in fig. 2 and 3, the refrigerator 100 of the embodiment of the present invention realizes the thermal connection between the cold end of the stirling refrigerator 300 and the cold guide plate 305 by using the cold guide device 303 including the cold end adapter 331 and the cold guide heat pipe 332, so that the cold transmission structure is stable and reliable, and the cold transmission efficiency is high. A heat insulating member may be provided outside the cold guide 303.

The stirling cooler 300 may include a housing, a cylinder (not shown), a piston (not shown), and a drive mechanism (not shown) for driving the piston in motion. The housing may be composed of a main body 301 and a cylindrical portion 302. The driving mechanism may be disposed within the body portion 301. The piston may be arranged to reciprocate within the cylinder portion 302 to form a cold end at an end of the cylinder portion 302 remote from the body portion 301 and a hot end at an end of the cylinder portion 302 proximate to the body portion 301. With continued reference to fig. 2, the rear bottom of the case 101 defines a device chamber 102; the stirling cooler 300 is disposed in the device chamber 102 behind the deep cooling inner tank 113, and the cold guide plate 305 is disposed adjacent to the outer side of the rear wall of the deep cooling inner tank 113. The stirling cooler 300 may be secured within the device chamber 102 by springs, shock mounts, or the like. By arranging the Stirling refrigerator 300 behind the cryogenic liner 113 and arranging the cold guide plate 305 to be attached to the outer side of the rear wall of the cryogenic liner 113, the distance between the Stirling refrigerator 300 and the cold guide plate 305 can be shortened, that is, the cold transmission distance is shortened, and the cold loss is reduced. Referring to fig. 2 and 4, the stirling refrigeration system may also include a heat sink 304. The heat dissipation device 304 is thermally connected to the hot end of the stirling cooler 300, and may include a hot end adapter 341, a heat conduction heat pipe 342, and a heat dissipation fin 343, where the hot end adapter 341 is fixedly and thermally connected to the hot end, one end of the heat conduction heat pipe 342 is fixedly and thermally connected to the hot end adapter 341, and the other end is inserted into the heat dissipation fin 343.

In some embodiments, the surface of cold guide plate 305 away from cryogenic bladder 113 is formed with a plurality of first grooves 351; the cold-conducting heat pipe 332 is inserted into the first groove 351. As shown in fig. 4, a plurality of first grooves 351 are formed in the rear surface of the cold conducting plate 305 in the up-down direction, and the cold conducting heat pipe 332 is inserted into the first grooves 351 from the top to the bottom. The utility model discloses refrigerator 100 is through leading the surface of keeping away from cryrogenic inner bag 113 of cold plate 305 and forming a plurality of first recesses 351, will lead cold heat pipe 332 to insert and realize leading cold heat pipe 332 and lead the fixed hot connection of cold plate 305 in locating first recess 351, can make lead cold heat pipe 332 and lead cold plate 305 full contact, improves coefficient of heat transfer, and assembly structure is simple and firm simultaneously.

In some embodiments, the surface of cold guide plate 305 away from cryogenic bladder 113 is further formed with a plurality of second grooves 352; the stirling refrigeration system further comprises: and the temperature equalizing heat pipe 353 is fixed in the second groove 352. The utility model discloses refrigerator 100 is through still being provided with samming heat pipe 353 on leading cold plate 305, can further strengthen the cold volume transmission efficiency of leading cold plate 305, and then reduces cold volume loss. As shown in fig. 5, the second recess 352 is a U-shaped groove; and at least a portion of the first groove 351 is formed at the U-shaped central depression of the second groove 352, so that the cold guiding heat pipes 332 and the temperature equalizing heat pipes 353 are uniformly spaced at the rear surface of the cold guiding plate 305, thereby further enhancing the cold energy transfer efficiency of the cold guiding plate 305. As shown in fig. 5, four first grooves 351 and two U-shaped second grooves 352 are formed on the rear surface of the cold conducting plate 305 at regular intervals, and the middle and lower parts of the two first grooves 351 located at the sides are respectively located at the U-shaped central depression of the second grooves 352. In addition, in order to reduce contact thermal resistance, a contact portion of the cold-conducting heat pipe 332 with the first groove 351 is coated with a heat-conducting grease; and/or the contact part of the soaking heat pipe 353 and the second groove 352 is coated with heat conducting grease.

In some embodiments, the refrigerator 100 of the present invention further includes: an air duct cover plate 105 and an air supply fan 150. That is, the deep cooling compartment 112 still uses the wind circulation to provide cooling, so as to enhance the air circulation. When the stirling cooler 300 is required to cool, for example, the blower fan 150 is kept on, thereby achieving the air flow circulation. As shown in FIG. 3, an air duct cover plate 105 is arranged on the inner side of the rear wall of the cryogenic inner container 113, and a containing cavity 120 is defined between the air duct cover plate 105 and the cryogenic inner container 113. An air supply outlet is arranged at the upper part of the air duct cover plate 105, and an air return inlet is arranged at the lower part of the air duct cover plate, so that a structure of returning air downwards and discharging air upwards is formed in the deep cooling compartment 112.

The embodiment of the utility model provides a refrigerator 100 still includes: the vapor compression refrigeration system comprises an evaporator 203, wherein the evaporator 203 is arranged in the accommodating cavity 120 or is arranged close to the outer side of the deep cooling inner container 113, so that the vapor compression refrigeration system can provide cold energy to the deep cooling compartment 112. The cryogenic compartment 112 of the refrigerator 100 of the present embodiment may be cooled by one or both of a stirling refrigeration system and a vapor compression refrigeration system. Thus, the utility model discloses refrigerator 100's cryrogenic compartment 112 has three kinds of refrigeration modes, and the first kind is only to utilize stirling refrigerating system to refrigerate, and the second kind is only to utilize vapor compression refrigerating system to refrigerate, and the third kind is to utilize stirling refrigerating system and vapor compression refrigerating system to refrigerate simultaneously, and two refrigerating system can complement each other.

The vapor compression refrigeration system may include an evaporator 203, a compressor 201, a condenser 202, a throttling element, and the like. As shown in fig. 2, the compressor 201 and the condenser 202 are also laterally spaced in the device chamber 102. A heat dissipation fan 206 may be disposed between the compressor 201 and the condenser 202 to facilitate heat dissipation of the compressor 201. By arranging the stirling cooler 300, the compressor 201, and the condenser 202 at equal intervals in the device chamber 102, the components of the refrigerator 100 can be arranged compactly and orderly, and can be assembled and maintained easily.

In some embodiments, the evaporator 203 is disposed in the accommodating chamber 120, and the heating pipe 204 is disposed on the evaporator 203 for providing heat required for defrosting of the evaporator 203 and the cold guiding plate 305. As shown in fig. 3, the evaporator 203 may be a finned tube evaporator, and includes a plurality of fins 231 and a refrigerant pipe 232 penetrating the fins 231, and a heating pipe 204 is disposed at a bottom of the evaporator 203. Since only one rear wall of the deep cooling inner container 113 is arranged between the evaporator 203 and the cold guide plate 305, heat is simultaneously supplied to the cold guide plate 305 when the heating pipe 204 is operated, and defrosting of the cold guide plate 305 is realized. Only the water pan 251 and the drain pipe 252 corresponding to the evaporator 203 are shown in fig. 3, and it is understood that the water pan and the drain pipe for receiving the defrosted water of the cold guide plate 305 are correspondingly disposed below the cold guide plate 305. An evaporation pan 205 is also provided in the device chamber 102, and ends of a plurality of drain pipes each extend into the evaporation pan 205. In other embodiments, evaporator 203 is positioned against the outside of cryogenic inner bladder 113. The evaporator 203 may be a plate-tube evaporator, including two heat exchange plates and a refrigerant pipeline sandwiched between the two heat exchange plates, the heat exchange plate on one side is disposed adjacent to the outer side of the deep cooling inner container 113, for example, may be disposed adjacent to the outer side of the left side of the deep cooling inner container 113. At this time, an aluminum foil heater may be attached to the rear surface of the cold guide plate 305 to defrost.

Fig. 6 is an exploded schematic view of the double door 400 and the door frame 430 of the refrigerator 100 shown in fig. 1. Fig. 7 is a partially enlarged schematic view of fig. 6. A double door 400 is provided at a front side of the deep cooling compartment 112 of the refrigerator 100 to enhance a heat insulating effect of the refrigerator 100. In some embodiments, the double door 400 includes an outer door body 401 and an inner door body 402; the inner door body 402 is positioned on the inner side of the outer door body 401, is arranged on the front side of the deep cooling chamber 112 and is used for opening and closing the deep cooling chamber 112; and the outer door body 401 and the inner door body 402 are provided independently of each other so that the inner door body 402 remains closed while the outer door body 401 is opened outward. The preservation temperature of the cryogenic compartment 112 is relatively low, when the cryogenic compartment 112 and the common compartment 111 share the same outer door body 401, the double-layer door 400 is arranged to include the outer door body 401 and the inner door body 402 which are independent of each other, the size of the outer door body 401 is larger than that of the inner door body 402, and the common compartment 111 is opened and closed by the outer door body 401, so that when a user takes and places articles from and in the common compartment 111, the inner door body 402 can be kept in a closed state under the condition that the outer door body 401 is opened, namely, the cryogenic compartment 112 is still sealed, and cold leakage can be effectively reduced. The distance between the inner door body 402 and the outer door body 401 is not more than 5 mm. The distance is too large, and the frosting risk is large. In addition, the outer surface of the inner door 402 may be provided with a heating wire, which may be intermittently turned on or turned on depending on conditions. Meanwhile, in order to ensure that the outer side of the inner door body 402 does not frost, a vacuum heat insulation board can be further arranged inside the inner door body 402, so that the temperature of the outer surface of the inner door body 402 is higher than 0 ℃. In order to overcome the negative pressure problem of the deep cooling compartment 112, a pressure balance hole may be further formed on the door seal of the inner door body 402 to ensure that the inner door body 402 can be opened smoothly.

The embodiment of the utility model provides a refrigerator 100 still includes: a door frame 430 and a mechanical locking mechanism. Door frame 430 is disposed at the front of tank 101 of deep cooling compartment 112. One end of the inner door 402 is connected to the cabinet 101, and the other end is detachably connected to the door frame 430 by a mechanical locking mechanism. By providing a separate door frame 430 in front of the tank 101 of the cryogenic compartment 112, the inner door 402 can be embedded within the tank 101. A seal strip is provided between the inner door body 402 and the door frame 430. Specifically, in order to ensure the sealing performance of the inner door body 402, a sealing strip is provided at the mating surface of the inner door body 402 and the door frame 430, and a sealing strip is also provided at the convex portion of the inner door body 402, i.e., a double door seal, which reduces the gap between the inner door body 402 and the door frame 430. Meanwhile, in order to prevent cold leakage, a seal may be provided between the upper portion of the inner door 402 and the general compartment 111. In some embodiments, the inner door 402 and the chest 101 may be connected by at least two hinges 450. By connecting the inner door 402 to the box 101 with the hinge 450, the angle of the inner door 402 when opened can be ensured to reach 90 °. In the embodiment shown in FIG. 6, the inner door 402 is attached to the cabinet 101 by two hinges 450.

In some embodiments, the front end surface of the door frame 430 is formed with a locking groove 431. The mechanical locking mechanism comprises a first structural member 501, a second structural member 502, a third structural member 503 and a rotating rod 504, wherein a clamping joint 5121 is formed on a side end plate 512 of the first structural member 501, and the first structural member 501 is rotatably connected with the side end surface of the inner door body 402 through the third structural member 503 and the rotating rod 504; the second structural member 502 is connected to the door frame 430 and has a protrusion 521 extending to the slot 431. The inner door body 402 and the door frame 430 are hermetically fixed by moving the clamping head 5121 into the clamping groove 431 and fitting the bulge 521, and the inner door body 402 and the door frame 430 are separated by moving the clamping head 5121 out of the clamping groove 431. Through set up draw-in groove 431 on door frame 430, utilize the joint 5121 of mechanical locking mechanism to realize the fixed and separation of interior door body 402 and door frame 430, also realize closing and opening of interior door body 402, the structure is ingenious, conveniently controls. Referring to fig. 7, the first structure 501 includes a front end plate 511 and a side end plate 512, and a through hole matching with the first rod (not shown) of the rotating rod 504 is formed on the side end plate 512. 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 402 by two mounting holes and a fixing member 530, a through hole for the rotating rod 504 to pass through is also formed between the two mounting holes corresponding to the through hole of the first structural member 501, 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 part of the rotating rod 504 is larger than that of the second rod part, that is, the outer diameter of the contact area of the rotating rod 504 and the first structural member 501 is larger than that of the contact area of the rotating rod 504 and the third structural member 503, so that the first structural member 501 can be connected with the inner door body 402 and can rotate at the same time. In addition, in order to make the installation of the third structural member 503 and the inner door 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. 7, the first structural member 501 rotates in the front-rear direction, the latch 5121 is formed to extend downward and rearward, and the second structural member 502 has a flat plate portion provided with a mounting hole and a protrusion 521 extending upward from the flat plate portion. It is understood that the first structural member 501 may also be rotated in the up-down direction, in which case the locking groove 431 may be opened in the left-right direction, and the protrusion 521 may extend leftwards or rightwards. In some embodiments, the front end surface of the inner door body 402 is formed with a recess 421; the front end plate 511 of the first structural member 501 extends into the recess 421, and the front side is provided with an indication plate 422. The front end plate 511 of the first structural member 501 is located in the concave portion 421, and can be used as a handle, so that the operation of a user is facilitated, the operation direction of the user can be reminded by arranging the indicating plate 422, and the use experience of the user is improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A refrigerator characterized by comprising:

the refrigerator comprises a box body and a deep cooling inner container, wherein a deep cooling chamber is limited in the deep cooling inner container; and

the Stirling refrigeration system comprises a Stirling refrigerator and a cold conducting plate, wherein the cold end of the Stirling refrigerator is thermally connected with the cold conducting plate; wherein

The cold guide plate is attached to the outer side of the deep cooling inner container, so that the Stirling refrigerating system can provide cold for the deep cooling chamber.

2. The refrigerator according to claim 1,

the stirling refrigeration system further comprising: lead cold charge and put, lead cold charge and put including cold junction adapter and a plurality of cold heat pipe of leading, the cold junction adapter with the cold junction fixed thermal connection, a plurality of cold heat pipe of leading one end with cold junction adapter thermal connection, the other end with lead cold drawing thermal connection.

3. The refrigerator according to claim 2,

a plurality of first grooves are formed on the surface of the cold guide plate, which is far away from the deep cooling inner container;

the cold guide heat pipe is inserted in the first groove.

4. The refrigerator according to claim 3,

a plurality of second grooves are formed on the surface of the cold guide plate, which is far away from the deep cooling inner container;

the stirling refrigeration system further comprising: and the temperature equalizing heat pipe is fixed in the second groove.

5. The refrigerator according to claim 4,

the second groove is a U-shaped groove; and is

At least a portion of the first groove is formed in the U-shaped central depression of the second groove.

6. The refrigerator according to claim 4,

the contact part of the cold conduction heat pipe and the first groove is coated with heat conduction grease; and/or

The contact part of the temperature equalizing heat pipe and the second groove is coated with the heat conducting grease.

7. The refrigerator according to claim 1,

a device chamber is defined at the bottom of the rear side of the box body;

the Stirling refrigerator is arranged in the device chamber and is positioned behind the deep cooling inner container;

the cold guide plate is attached to the outer side of the rear wall of the deep cooling inner container.

8. The refrigerator according to claim 7, further comprising:

the air channel cover plate is arranged on the inner side of the rear wall of the deep cooling chamber, an accommodating cavity is formed between the air channel cover plate and the deep cooling inner container, and an air supply outlet and an air return inlet are formed in the air channel cover plate; and

and the air supply fan is arranged at the air supply port.

9. The refrigerator according to claim 8, further comprising:

vapor compression refrigerating system, including the evaporimeter, the evaporimeter set up in hold the intracavity or paste the outside of cryrogenic inner bag sets up, thereby realizes vapor compression refrigerating system to cryrogenic compartment provides cold volume.

10. The refrigerator according to claim 9,

the evaporator set up in hold the intracavity, just be provided with the heating pipe on the evaporator, be used for providing the evaporator with lead the required heat of cold plate defrosting.

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