CN214276202U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, include: a box body and an air duct cover plate; the Stirling refrigerating system comprises a Stirling refrigerator, a cold guide device and a heat exchanger and is configured to provide cold energy to the deep cooling chamber through the air supply outlet; the Stirling refrigerator is arranged outside the cryogenic inner container, one end of the cold guide piece is thermally connected with the cold end of the Stirling refrigerator, and the other end of the cold guide piece penetrates through the cryogenic inner container and extends into the accommodating space; the heat exchanger and the cold guide heat pipe are arranged in the accommodating space, the first end of the cold guide heat pipe is thermally connected with the cold guide piece, and the second end of the cold guide heat pipe is thermally connected with the heat exchanger. The utility model discloses a cold heat pipe leads of refrigerator's length is whole can shorten, and then can reduce the loss when cold volume is through the transmission of cold heat pipe leads.

Description

Refrigerator with a door

Technical Field

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

Background

With the health emphasis of people, the household stock of high-end food materials is also increasing. According to the research, the storage temperature of the food material is lower than the glass transition temperature, the property of the food material is relatively stable, and the quality guarantee period is greatly prolonged. Wherein the glass transition temperature of the food material is mostly concentrated at-80 ℃ to-30 ℃. 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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a refrigerator that cold volume loss of cold conduction heat pipe reduces.

A further object of the present invention is to provide a refrigerator having a storage compartment cooled by both a stirling cooling system and a vapor compression cooling system.

Particularly, the utility model provides a refrigerator, include:

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

the air channel cover plate is arranged in the deep cooling inner container, an accommodating space is defined between the air channel cover plate and the deep cooling inner container, and an air supply outlet is formed in the air channel cover plate; and

the Stirling refrigerating system comprises a Stirling refrigerator, a cold guide device and a heat exchanger, and is configured to provide cold energy to the deep cooling chamber through an air supply outlet; wherein

The cold guide device comprises a cold guide part and a cold guide heat pipe, the Stirling refrigerator is arranged outside the cryogenic inner container, one end of the cold guide part is thermally connected with the cold end of the Stirling refrigerator, and the other end of the cold guide part penetrates through the cryogenic inner container to extend into the accommodating space; the heat exchanger and the cold guide heat pipe are arranged in the accommodating space, the first end of the cold guide heat pipe is thermally connected with the cold guide piece, and the second end of the cold guide heat pipe is thermally connected with the heat exchanger.

Optionally, the Stirling refrigerator is vertically arranged behind the cryogenic inner container, and the cold end is arranged at the upper part;

the cold guide part is at least provided with an annular structure at the lower part thereof and sleeved outside the cold end of the Stirling refrigerator, and the upper part of the cold guide part penetrates through the deep cooling inner container and extends into the accommodating space.

Optionally, the outer side of the part of the cold guide piece, which is positioned outside the deep cooling liner, is wrapped with a heat preservation piece; and is

The heat preservation member has a stepped structure.

Optionally, the cold-conducting piece is an aluminum piece;

the heat preservation piece is low-temperature sponge.

Optionally, the heat exchanger includes a cold guide plate and a plurality of cooling guide fins arranged at intervals, wherein the second end of the cooling guide heat pipe is thermally connected with the cold guide plate, the plurality of cooling guide fins extend forwards from the front surface of the cold guide plate to form, and an air outlet channel is defined between adjacent cooling guide fins.

Optionally, the cold guide device further includes a first fixing member, a lower portion of the first fixing member is fixed to an upper portion of the cold guide member, the first fixing member is further formed with a plurality of first pipe holes, and first ends of the cold guide heat pipes are inserted into the first pipe holes;

the heat exchanger also comprises a second fixing piece, the front part of the second fixing piece is fixed with the rear part of the cold guide plate, a plurality of second pipe holes are formed in the second fixing piece, and the second ends of the cold guide heat pipes are inserted into the second pipe holes.

Optionally, the refrigerator further comprises a vapor compression refrigeration system, wherein the vapor compression refrigeration system comprises a compressor, a condenser pipe, a throttling element and an evaporating pipe, at least one part of the evaporating pipe is arranged in the accommodating space, and therefore the vapor compression refrigeration system can provide cold energy for the deep cooling compartment.

Optionally, a plurality of third pipe holes are formed on the cold conducting plate;

the part of the evaporation tube in the accommodating space penetrates through the third tube holes.

Optionally, the lower part of the deep cooling chamber is provided with an air return inlet communicated with the accommodating space;

the air supply outlet is arranged at the upper part of the air duct cover plate;

the heat exchanger is arranged at the lower part of the accommodating space and is configured in such a way that the airflow flowing into the accommodating space from the air return inlet passes through the heat exchanger from bottom to top.

Optionally, a heating wire is further arranged on the heat exchanger for defrosting;

the bottom of the deep cooling liner is provided with a water outlet corresponding to the position of the heat exchanger, and defrosting water of the heat exchanger is discharged out of the deep cooling liner through the water outlet.

The utility model discloses a receiving space is injectd to the refrigerator through utilizing wind channel apron and cryrogenic inner bag, will lead the cold charge and set up to include and lead cold spare and lead the cold heat pipe, lead the one end of cold spare and the cold junction thermal connection of stirling refrigerator, in the other end passed cryrogenic inner bag and extended to receiving space, heat exchanger and lead the cold heat pipe and set up in receiving space for lead the whole length that can shorten of cold heat pipe, and then can reduce the loss of cold volume when leading the cold heat pipe transmission.

Furthermore, the refrigerator of the utility model vertically arranges the Stirling refrigerator behind the deep cooling inner container, and the cold end is arranged at the upper part, so that the whole length of the cold guide piece can be shortened as much as possible to reduce the loss of cold energy; make simultaneously lead cold spare and have annular structure at least in its lower part, the outside of stirling refrigerator's cold junction is located to the cover, can guarantee to lead cold spare and stirling refrigerator's cold junction and can fully contact, further guarantee to pass cold effect.

Further, the utility model discloses a refrigerator still includes vapor compression refrigerating system, sets up in accommodation space through at least partly with vapor compression refrigerating system's evaporating pipe for the temperature of preserving of cryrogenic compartment is widened, and can use stirling refrigerating system and vapor compression refrigerating system to provide cold volume to it when needs cryrogenic compartment rapid cooling simultaneously, improves refrigeration efficiency.

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 front view schematically illustrating parts of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a partial rear view schematic diagram of the refrigerator shown in fig. 1.

Fig. 3 is a schematic sectional view taken along line a-a of the refrigerator shown in fig. 2.

Fig. 4 is a perspective view schematically illustrating a heat exchanger of the refrigerator shown in fig. 1.

Fig. 5 is an exploded schematic view of a double door and a door frame of the refrigerator shown in fig. 1.

Fig. 6 is a partially enlarged schematic view of fig. 5.

Detailed Description

Fig. 1 is a schematic front view of parts of a refrigerator 100 according to an embodiment of the present invention. Fig. 2 is a partial rear view of the refrigerator 100 shown in fig. 1. Fig. 3 is a schematic sectional view of the refrigerator 100 shown in fig. 2 taken along line a-a.

The utility model discloses refrigerator 100 includes: the box 101, the duct cover 307 and the stirling refrigeration system. The box 101 may include a casing 110, an inner container disposed in the casing 110, and a heat insulation layer disposed between the casing 110 and the inner container. The inner container defines a storage compartment, and the refrigerator 100 may include at least one common inner container and at least one cryogenic inner container 113, wherein the common inner container 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 other non-ultra-low temperature compartments that cannot achieve ultra-low temperature except for the cryogenic compartment 112, such as a refrigerating compartment, a freezing compartment, and a temperature-changing compartment, which are respectively defined by a refrigerating liner, a freezing liner, and a temperature-changing liner. The preservation temperature of the cold storage chamber can be 4-7 ℃ generally, and the preservation temperature of the freezing chamber can be-20-16 ℃ generally. The temperature-changing chamber can be adjusted according to requirements and used as a refrigerating chamber or a freezing chamber. The cryogenic chamber 112 refers to a chamber refrigerated by a Stirling refrigeration system, and the preservation temperature can be generally-14 ℃ to-80 ℃. In the refrigerator 100 shown in fig. 1, the refrigerator 100 may be a cross-door refrigerator, and the common compartment 111 of the refrigerator 100 is a refrigerating compartment located at an upper portion, a temperature-changing compartment located at a left side of a lower portion, a freezing compartment located at a right side upper portion of the lower portion, and a deep-cooling compartment 112 located below the freezing compartment.

As shown in fig. 3, an air duct cover 307 is disposed in the deep cooling inner container 113, and defines the accommodating space 103 with the deep cooling inner container 113, and an air supply outlet 370 is opened on the air duct cover 307. A blower fan 308 may also be provided at the blower port 370 to promote airflow toward the blower port 370.

The stirling refrigeration system may include a stirling cooler 300, a cold sink 303, and a heat exchanger 305 configured to provide cold to cryogenic compartment 112 via a supply air port 370. The stirling cooler 300 may include a casing, a cylinder, a piston, and a driving mechanism for driving the piston to move, disposed outside the cryogenic inner tank 113. 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 and a hot end. The cold guide device 303 comprises a cold guide part 330 and a cold guide heat pipe 332, one end of the cold guide part 330 is thermally connected with the cold end of the stirling refrigerator 300, and the other end of the cold guide part passes through the cryogenic inner container 113 and extends into the accommodating space 103; the heat exchanger 305 and the cold-conducting heat pipe 332 are disposed in the accommodating space 103, and a first end of the cold-conducting heat pipe 332 is thermally connected to the cold-conducting member 330, and a second end is thermally connected to the heat exchanger 305.

The utility model discloses refrigerator 100 is through utilizing wind channel apron 307 and cryrogenic inner bag 113 to inject accommodation space 103, set cold guide 303 to including cold guide 330 and cold guide heat pipe 332, cold guide 330's one end and stirling refrigerator 300's cold end thermal connection, the other end passes cryrogenic inner bag 113 and extends to accommodation space 103 in, heat exchanger 305 and cold guide heat pipe 332 set up in accommodation space 103, this kind of setting makes cold guide heat pipe 332 only extend in accommodation space 103, whole length can shorten, and then can reduce the loss of cold volume when leading cold guide heat pipe 332 to transmit.

Referring to fig. 2, the stirling refrigeration system may also include a heat sink 304. The heat sink 304 is thermally coupled to the hot side of the stirling cooler 300 and may include a hot side adapter 341, a heat conducting heat pipe 342, and fins 343.

In some embodiments, the stirling cooler 300 is disposed vertically behind the cryogenic liner 113, with the cold end at the top; the cold guide member 330 has an annular structure at least at the lower part thereof, and is sleeved outside the cold end of the stirling cooler 300, and the upper part of the cold guide member 330 extends into the accommodating space 103 through the cryogenic inner container 113. Referring to fig. 2 and 3, a device chamber 102 is defined at the bottom of the rear side of the cabinet 101, and the stirling cooler 300 is disposed corresponding to the deep cooling compartment 112. The stirling cooler 300 may be secured within the device chamber 102 by springs, shock mounts, or the like. In the refrigerator 100 of the embodiment of the present invention, the stirling refrigerator 300 is vertically disposed behind the cryogenic inner container 113, and the cold end is disposed at the upper portion, so that the overall length of the cold guide 330 can be reduced as much as possible, thereby reducing the loss of cold energy; meanwhile, the cold guide part 330 is at least provided with an annular structure at the lower part thereof and sleeved outside the cold end of the Stirling refrigerator 300, so that the cold guide part 330 can be fully contacted with the cold end of the Stirling refrigerator 300, and the cold transmission effect is further ensured.

In some embodiments, as shown in FIGS. 2 and 3, the portion of cold conducting member 330 outside cryogenic inner tank 113 is wrapped with insulation 306; and the heat insulating member 306 has a stepped structure. The refrigerator 100 of the embodiment of the present invention can reduce the loss of cooling capacity by wrapping the heat insulating member 306 outside the part of the cold guide member 330 outside the deep cooling inner container 113; the heat insulation piece 306 is arranged to be of a step-shaped structure, so that the sealing surface of the heat insulation piece 306 and the foaming layer can be increased, and the heat insulation effect is further enhanced. Preferably, the cold sink 330 is an aluminum piece; the thermal insulation 306 is a low temperature sponge. The cold guide member 330 of the embodiment of the present invention is made of aluminum, so that the weight of the cold guide member 330 can be reduced while ensuring good cold transmission effect; the heat insulating member 306 is made of low-temperature sponge, and can attenuate the vibration transmitted from the Stirling refrigerator 300 to the cold guide heat pipe 332 while insulating.

Fig. 4 is a perspective view of the heat exchanger 305 of the refrigerator 100 shown in fig. 1. The heat exchanger 305 includes a cold conducting plate 351 and a plurality of cooling conducting fins 352 spaced apart from each other, wherein the second end of the cooling conducting heat pipe 332 is thermally connected to the cold conducting plate 351, and the plurality of cooling conducting fins 352 extend forward from the front surface of the cold conducting plate 351, and air flow passages are defined between the adjacent cooling conducting fins 352. By configuring the heat exchanger 305 to have the cold conductive plate 351 and the plurality of cold conductive fins 352, the heat exchange efficiency can be improved by thermally connecting the cold conductive heat pipe 332 with the cold conductive plate 351 and defining the air flow channel between the adjacent cold conductive fins 352. As shown in fig. 3, the lower portion of the deep cooling compartment 112 is provided with a return air inlet (not shown in the figure) communicated with the accommodating space 103; the air supply outlet 370 is opened at the upper part of the air duct cover plate 307; heat exchanger 305 is provided at the lower portion of storage space 103, and the airflow path extends substantially in the vertical direction, and the airflow flowing into storage space 103 from the return air inlet passes through heat exchanger 305 from the bottom to the top, thereby forming a structure in which the air is returned downward and discharged upward in deep cooling compartment 112. With continued reference to fig. 4, in some embodiments, heating wires 354 are also provided on the heat exchanger 305 for defrosting; a water outlet is formed in the bottom of the deep cooling inner container 113 at a position corresponding to the heat exchanger 305, and the defrosting water of the heat exchanger 305 is discharged out of the deep cooling inner container 113 through the water outlet. Referring to fig. 3, the lower portion of the rear wall of the cryogenic inner container 113 inclines forwards, the heat exchanger 305 is arranged in an inclined structure approximately parallel to the lower portion of the rear wall of the cryogenic inner container 113, a water pan 309 is formed at the bottom of the cryogenic inner container 113 corresponding to the position of the heat exchanger 305, the water pan 309 comprises a front side wall 391, a bottom wall 393 and a rear side wall 392 which are connected in sequence, wherein the front side wall 391 inclines backwards, the rear side wall 392 inclines forwards, a water discharge port is formed in the bottom wall 393, a water discharge pipe 394 is connected to the outer side of the water discharge port 394, and the water outlet of the water discharge pipe extends into the evaporation pan 205 in the device chamber 102.

In some embodiments, the cold guiding device 303 further includes a first fixing member 331, a lower portion of the first fixing member 331 is fixed to an upper portion of the cold guiding member 330, the first fixing member 331 further has a plurality of first pipe holes (not shown), and a first end of the cold guiding heat pipe 332 is inserted into the first pipe holes; the heat exchanger 305 further includes a second fixing member 353, a front portion of the second fixing member 353 is fixed to a rear portion of the cold guide plate 351, a plurality of second pipe holes 3510 are further formed in the second fixing member 353, and a second end of the cold guide heat pipe 332 is inserted into the second pipe holes 3510. Through setting up first mounting 331 and second mounting 353 for the installation of leading cold heat pipe 332 and leading cold spare 330, heat exchanger 305 is connected reliably, and the assembly is simple convenient, has improved production efficiency, has reduced manufacturing cost. Generally, the first fixing member 331 has two separable parts, the upper part and the lower part are respectively provided with pipe slots, and the upper pipe slot and the lower pipe slot are butted to form a first pipe hole, so as to facilitate fixing of the first end of the cold conducting heat pipe 332; the second fixing member 353 has two separable parts, the two parts have corresponding pipe slots, and the pipe slots are butted to form a second pipe hole 3510, so as to facilitate fixing of the second end of the cold-conducting heat pipe 332. The cooling member 330 and the first fixing member 331, and the heat exchanger 305 and the second fixing member 353 may be fixed by bolts or welding.

In some embodiments, the refrigerator 100 of the present invention further includes a vapor compression refrigeration system, the vapor compression refrigeration system includes a compressor 201, a condenser tube (not shown), a throttling element (not shown), and an evaporation tube 204, wherein at least a portion of the evaporation tube 204 is disposed in the accommodating space 103, so as to provide cold to the deep cooling compartment 112 by the vapor compression refrigeration system. The cryogenic compartment 112 has three refrigeration modes by arranging a vapor compression refrigeration system, wherein the first refrigeration mode is to adopt only a Stirling refrigeration system for refrigeration, the second refrigeration mode is to adopt only the vapor compression refrigeration system for refrigeration, and the third refrigeration mode is to adopt the Stirling refrigeration system and the vapor compression refrigeration system for refrigeration, and the two refrigeration systems can be mutually supplemented. Therefore, the preservation temperature range of the deep cooling chamber 112 can be further widened, so that the preservation temperature of the deep cooling chamber 112 can be changed in a wide temperature range from 4 ℃ to-80 ℃, and three functions of refrigeration, freezing and ultralow temperature freezing can be realized. The utility model discloses refrigerator 100 sets up in accommodation space 103 through at least some with vapor compression refrigerating system's evaporating pipe 204 for cryrogenic compartment 112's the temperature range of preserving is wider, can use stirling refrigerating system and vapor compression refrigerating system to provide cold volume to it simultaneously when needs cryrogenic compartment 112 rapid cooling, improves refrigeration efficiency. As shown in fig. 2, the compressor 201 is also disposed in the device chamber 102, spaced apart from the stirling cooler 300, and a heat radiation fan 203 is further disposed on the other side of the stirling cooler 300. As shown in fig. 4, a plurality of third pipe holes (not shown) are formed in the cold guide plate 351; the evaporation tube 204 is disposed in the accommodation space 103 and passes through the third holes. By assembling and fixing the evaporation tube 204 and the heat exchanger 305, the heat exchange efficiency of the vapor compression refrigeration system during refrigeration can be improved, and the components in the accommodating space 103 can be arranged compactly and orderly.

Fig. 5 is an exploded schematic view of the double door 400 and the door frame 430 of the refrigerator 100 shown in fig. 1. Fig. 6 is a partially enlarged schematic view of fig. 5. 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. 5, 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. 6, 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. 6, 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 at least one cryogenic inner container, wherein a cryogenic chamber is limited in the cryogenic inner container;

the air channel cover plate is arranged in the deep cooling inner container, an accommodating space is defined between the air channel cover plate and the deep cooling inner container, and an air supply outlet is formed in the air channel cover plate; and

the Stirling refrigerating system comprises a Stirling refrigerator, a cold guide device and a heat exchanger and is configured to provide cold energy to the deep cooling chamber through the air supply outlet; wherein

The cold guide device comprises a cold guide part and a cold guide heat pipe, the Stirling refrigerator is arranged outside the cryogenic inner container, one end of the cold guide part is thermally connected with the cold end of the Stirling refrigerator, and the other end of the cold guide part penetrates through the cryogenic inner container and extends into the accommodating space; the heat exchanger and the cold guide heat pipe are arranged in the accommodating space, the first end of the cold guide heat pipe is thermally connected with the cold guide piece, and the second end of the cold guide heat pipe is thermally connected with the heat exchanger.

2. The refrigerator according to claim 1,

the Stirling refrigerator is vertically arranged behind the deep cooling liner, and the cold end is positioned at the upper part;

the cold guide part is at least provided with an annular structure at the lower part and sleeved outside the cold end of the Stirling refrigerator, and the upper part of the cold guide part penetrates through the deep cooling inner container and extends into the accommodating space.

3. The refrigerator according to claim 1,

the outer side of the part of the cold guide piece, which is positioned outside the deep cooling inner container, is wrapped with a heat preservation piece; and is

The heat preservation member has a stepped structure.

4. The refrigerator according to claim 3,

the cold guide piece is an aluminum piece;

the heat preservation piece is low-temperature sponge.

5. The refrigerator according to claim 1,

the heat exchanger comprises a cold guide plate and a plurality of cold guide fins arranged at intervals, wherein the second end of the cold guide heat pipe is in thermal connection with the cold guide plate, the plurality of cold guide fins extend forwards from the front surface of the cold guide plate to form, and an air outlet channel is defined between every two adjacent cold guide fins.

6. The refrigerator according to claim 5,

the cold guide device further comprises a first fixing piece, the lower part of the first fixing piece is fixed with the upper part of the cold guide piece, a plurality of first pipe holes are formed in the first fixing piece, and first ends of the cold guide heat pipes are inserted into the first pipe holes;

the heat exchanger further comprises a second fixing piece, the front portion of the second fixing piece is fixed with the rear portion of the cold guide plate, a plurality of second pipe holes are formed in the second fixing piece, and second ends of the cold guide heat pipes are inserted into the second pipe holes.

7. The refrigerator according to claim 5,

the refrigerator also comprises a vapor compression refrigerating system, which comprises a compressor, a condensation pipe, a throttling element and an evaporation pipe, wherein at least one part of the evaporation pipe is arranged in the accommodating space, so that the vapor compression refrigerating system provides cold for the deep cooling chamber.

8. The refrigerator according to claim 7,

a plurality of third pipe holes are formed in the cold guide plate;

the part of the evaporation tube in the accommodating space penetrates through the plurality of third tube holes.

9. The refrigerator according to claim 1,

the lower part of the deep cooling chamber is provided with an air return inlet communicated with the accommodating space;

the air supply outlet is arranged at the upper part of the air duct cover plate;

the heat exchanger is arranged at the lower part of the accommodating space and is configured to enable the airflow flowing into the accommodating space from the air return inlet to pass through the heat exchanger from bottom to top.

10. The refrigerator according to claim 1,

the heat exchanger is also provided with a heating wire for defrosting;

the bottom of cryrogenic inner bag corresponds heat exchanger's position department has seted up the outlet, heat exchanger's defrosting water warp the outlet is discharged cryrogenic inner bag.

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