CN214276199U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, include: the Stirling refrigeration system comprises a Stirling refrigerator, a cold guide piece and a heat exchanger, wherein one end of the cold guide piece is thermally connected with the cold end of the Stirling refrigerator, the other end of the cold guide piece is thermally connected with the heat exchanger, the heat exchanger is provided with a first fixing groove, and a second fixing groove is formed in the position, corresponding to the first fixing groove, of the cold guide piece; and the heating rod is configured to be inserted into the first fixing groove and the second fixing groove to be fixedly inserted with the heat exchanger and the cold conduction piece, and is used for providing heat required by defrosting of the heat exchanger. The utility model discloses an assembly structure of heating rod of refrigerator is simple and firm fixed, is difficult for droing.

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 ℃. The existing household refrigerator adopting Stirling refrigeration has the problems that a heat exchanger of a Stirling refrigeration system is complex in structure and defrosting components are not easy to configure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an easy configuration of defrosting part and firm refrigerator that utilizes stirling refrigerating system to cool.

A further object of the utility model is to provide a refrigerator that utilizes stirling refrigerating system to supply cold that heat exchanger defrosting is effectual.

Particularly, the utility model provides a refrigerator, include:

the Stirling refrigeration system comprises a Stirling refrigerator, a cold guide piece and a heat exchanger, wherein one end of the cold guide piece is thermally connected with the cold end of the Stirling refrigerator, the other end of the cold guide piece is thermally connected with the heat exchanger, the heat exchanger is provided with a first fixing groove, and a second fixing groove is formed in the position, corresponding to the first fixing groove, of the cold guide piece; and

and the heating rod is configured to be inserted into the first fixing groove and the second fixing groove to be fixedly connected with the heat exchanger and the cold guide piece in an inserting mode and used for providing heat required by defrosting of the heat exchanger.

Optionally, the heat exchanger comprises: the cooling guide plate is formed by extending forwards from the front surface of the cooling guide plate, and an air outlet channel is defined between adjacent cooling guide fins; wherein the cold guide plate is provided with a first fixing groove.

Optionally, the cold guide piece comprises a cold guide ring and a cold guide block;

the cold guide ring is sleeved on the periphery of the cold end;

the front end of the cold guide block is fixed with the cold guide plate, the rear end of the cold guide block is fixed with the cold guide ring, and a second fixing groove is formed in the cold guide block.

Optionally, a first fixing groove is formed in the center of the cold conducting plate in a penetrating mode along the front-back direction;

the center of the cold guide block is provided with a second fixing groove along the front-back direction.

Optionally, a plurality of first mounting holes are formed in the cold guide plate at intervals around the first fixing groove in a penetrating manner in the front-back direction;

a plurality of second mounting holes along the front-back direction are formed in the positions, corresponding to the first mounting holes, of the cold guide block;

the fixing piece is used for connecting the first mounting hole and the second mounting hole to fix the cold guide plate and the cold guide block.

Optionally, a plurality of third mounting holes are formed in the cold guide ring at intervals in the front-back direction;

a plurality of fourth mounting holes along the front-back direction are formed in the positions, corresponding to the plurality of third mounting holes, of the cold guide block in a penetrating manner;

and the fixing piece is used for connecting the fourth mounting hole and the third mounting hole to fix the cold guide block and the cold guide ring.

Optionally, the cold guide ring is a circular ring structure with a gap, and comprises a first end part and a second end part which are oppositely arranged; wherein first fixed orifices along left right direction is seted up to first end, and the second fixed orifices along left right direction is seted up to the position department that second end corresponds first fixed orifices to make and lead behind the cold junction ring cover located the cold junction, utilize the mounting to connect first fixed orifices and second fixed orifices and realize leading the cold junction and fix.

Optionally, the refrigerator further comprises:

an auxiliary pipe configured to be inserted into the first fixing groove and the second fixing groove;

the heating rod is inserted into the auxiliary pipe, and one end of the heating rod, which is close to the cold guide fin, is connected with a lead.

Optionally, the first fixing groove and the second fixing groove are both cylindrical structures;

the auxiliary pipe is a cylindrical structure with a notch;

the heating rod is of a cylindrical structure.

Optionally, the stirling cooler comprises a casing, a cylinder, a piston, a drive mechanism, a heat dissipation fan and a finned heat sink; the shell comprises a main body part and a cylindrical part, a driving mechanism is arranged in the main body part, and a piston is configured to be driven by the driving mechanism to reciprocate in the cylindrical part so that a cold end is formed at one end of the cylindrical part, which is far away from the main body part, and a hot end is formed at one end, which is close to the main body part; an opening is formed in the side wall of the main body part, and the heat dissipation fan is arranged at the opening; the fin radiator is arranged on the periphery of the hot end and fixed with the main body part.

The utility model discloses a refrigerator is through setting up first fixed slot on stirling refrigerating system's heat exchanger, and it sets up the second fixed slot to correspond first fixed slot position department on leading cold member, configures the heating rod to insert and come to peg graft fixedly with heat exchanger and leading cold member in first fixed slot and the second fixed slot for the assembly structure of heating rod is simple and firm.

Furthermore, the refrigerator of the utility model arranges the heat exchanger to comprise the cold guide plate and a plurality of cold guide fins, and an airflow channel is defined between the adjacent cold guide fins, so that the heat exchanger has simple structure and easy manufacture, can realize large-area heat exchange and improve the heat exchange efficiency; through set up first fixed slot on leading cold plate, can improve the defrosting 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 perspective view of a part of components of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a side view of a portion of the components of the refrigerator shown in fig. 1.

Fig. 3 is a schematic configuration diagram of a stirling refrigerating system of the refrigerator shown in fig. 1.

Fig. 4 is a schematic cross-sectional view of a portion of the components taken along line a-a in fig. 3.

Fig. 5 is a partial exploded schematic view of the stirling refrigeration system of the refrigerator shown in fig. 3.

Fig. 6 is another partial exploded schematic view of the stirling refrigeration system of the refrigerator shown in fig. 3.

Fig. 7 is an exploded schematic view of a double door and a door frame of the refrigerator shown in fig. 1.

Fig. 8 is a partially enlarged schematic view of fig. 7.

Detailed Description

In the following description, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "left", "right", etc. is an orientation based on the refrigerator 100 itself as a reference, as shown 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 side view of a portion of the components of the refrigerator 100 shown in fig. 1. Fig. 3 is a schematic configuration diagram of the stirling refrigerating system of the refrigerator 100 shown in fig. 1. Fig. 4 is a schematic cross-sectional view of a portion of the components taken along line a-a in fig. 3. Fig. 5 is a partially exploded schematic view of the stirling refrigeration system of the refrigerator 100 shown in fig. 3. Fig. 6 is another partial exploded schematic view of the stirling refrigeration system of the refrigerator 100 shown in fig. 3.

The refrigerator 100 of the embodiment of the present invention may generally include: a cabinet 101, a stirling refrigeration system, and a heater bar 353. The box body 101 is internally provided with storage chambers, and at least one storage chamber is a deep cooling chamber 112. The stirling refrigeration system is configured to provide refrigeration to cryogenic compartment 112. The stirling refrigeration system includes a stirling cooler 300, a cold sink 303, and a heat exchanger 305. One end of the cold conductor 303 is thermally connected to the cold end of the stirling cooler 300 and the other end is thermally connected to the heat exchanger 305. The heat exchanger 305 has a first fixing groove 361, and the cooling guide 303 has a second fixing groove 362 at a position corresponding to the first fixing groove 361. The heating rod 353 is configured to be inserted into the first fixing groove 361 and the second fixing groove 362 to be fixedly inserted into the heat exchanger 305 and the cold guide member 303, for providing heat required for defrosting of the heat exchanger 305. The utility model discloses refrigerator 100 is through setting up first fixed slot 361 on stirling refrigerating system's heat exchanger 305, it sets up second fixed slot 362 to correspond first fixed slot 361 position department on leading cold piece 303, configure heating rod 353 to insert first fixed slot 361 and second fixed slot 362 in come with heat exchanger 305 and lead cold piece 303 grafting fixed, make the assembly structure of heating rod 353 simple and firm fixed, it is also very easy to configure that stirling refrigerating system's defrosting structure, and then assembly efficiency improves, and processing cost reduces.

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 defining a common compartment 111 and at least one cryogenic inner container defining a cryogenic compartment 112. Herein, the "normal liner" refers to other liners except for the cryogenic liner, such as a refrigerating liner, a freezing liner, and a temperature-changing liner. Correspondingly, the "ordinary compartment" refers to other non-ultralow temperature compartments, such as a refrigerating compartment, a freezing compartment and a temperature-changing compartment, which are not cooled by the stirling refrigerating system and cannot realize ultralow temperature, except the cryogenic compartment 112, and 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. Cryogenic compartment 112 refers to a compartment that is cooled using at least a stirling refrigeration system. In the embodiment shown in fig. 1, the refrigerator 100 is a cross-door refrigerator, and the storage compartments include a cold storage compartment located at the upper portion, a freezing compartment located at the right side of the lower portion, a temperature-changing compartment located above the left side of the lower portion, and a deep cooling compartment 112 located below the left side of the lower portion.

In some embodiments, the heat exchanger 305 of the refrigerator 100 of the present invention includes: the cooling system comprises a cold guide plate 351 and a plurality of cold guide fins 352, wherein the cold guide fins 352 extend forwards from the front surface of the cold guide plate 351, and airflow channels are defined between adjacent cold guide fins 352; the cold conducting plate 351 is provided with a first fixing groove 361. The refrigerator 100 according to the embodiment of the present invention arranges the heat exchanger 305 to include the cold guiding plate 351 and the plurality of cold guiding fins 352, and an airflow channel is defined between the adjacent cold guiding fins 352, so that the heat exchanger 305 has a simple structure, is easy to manufacture, and can realize large-area heat exchange and improve heat exchange efficiency; meanwhile, as the plurality of cold guide fins 352 are connected with the cold guide plate 351, the first fixing groove 361 is formed in the cold guide plate 351, and compared with the first fixing groove 361 formed in a certain cold guide fin 352, the heat transfer effect of the heating rod 353 is better, and the defrosting efficiency is improved. Referring to fig. 2, the heat exchanger 305 is generally disposed in the deep cooling compartment 112, the device chamber 102 is formed at the rear bottom of the casing 101, and the stirling cooler 300 is disposed in the device chamber 102 and behind the deep cooling compartment 112. An air duct cover plate (not shown in the figure) is arranged on the inner side of the rear wall of the deep cooling compartment 112, an accommodating space is defined between the air duct cover plate and the inner container of the deep cooling compartment 112, the heat exchanger 305 is arranged in the accommodating space, an air supply opening is formed in the position, not lower than the heat exchanger 305, of the air duct cover plate, a return air opening is formed in the lower portion of the air duct cover plate, an air flow channel of the heat exchanger 305 extends approximately in the vertical direction, and air flow flowing into the accommodating space from the return air opening penetrates through the heat exchanger 305 from bottom to top, so that a structure that air flows back down and goes up is formed in the deep cooling compartment 112.

In some embodiments, the cold guide 303 of the refrigerator 100 of the present invention includes a cold guide ring 331 and a cold guide block 332. The cold conduction ring 331 is sleeved on the cold end for a circle. The front end of the cold guide block 332 is fixed to the cold guide plate 351, and the rear end is fixed to the cold guide ring 331, wherein the cold guide block 332 is provided with a second fixing groove 362. By thermally connecting the heat exchanger 305 and the stirling cooler 300 by the cold guide 303 including the cold guide ring 331 and the cold guide block 332, the cold transfer can be effectively achieved, and the cold guide 303 is simple in structure and easy to configure. A heat insulating member (not shown) may be provided outside the cooling guide member 303.

In some embodiments, the refrigerator 100 of the present invention further includes: an auxiliary tube 355 configured to be inserted into the first fixing groove 361 and the second fixing groove 362, and a heating rod 353 inserted into the auxiliary tube 355. An end of the heating rod 353 near the cooling guide fin 352 is connected with a conducting wire 354. The auxiliary pipe 355 may be a steel pipe having good thermal conductivity and appropriate strength, and may be conveniently assembled in the first and second fixing grooves 361 and 362. The diameter of the heating rod 353 can be 5-10mm, so that the situation that the heating rod 353 occupies the position of the cooling guide fin 352 due to too thick thickness can be avoided, and the problem that the heating efficiency is low due to too thin heating rod 353 can be avoided. The insulating material of the conductive line 354 may be teflon, which is resistant to low temperature. As shown in fig. 4 and 5, the first fixing groove 361 and the second fixing groove 362 are both cylindrical structures; the auxiliary tube 355 has a cylindrical structure having a notch 3550; the heating rod 353 has a cylindrical structure. By arranging the heating rod 353 in a cylindrical shape and matching the cylindrical auxiliary tube 355 having the notch 3550 and the cylindrical first fixing groove 361 and the cylindrical second fixing groove 362, the assembly of the heating rod 353 and the auxiliary tube 355, the assembly of the auxiliary tube 355 and the first fixing groove 361 and the second fixing groove 362 are very convenient, and the heating rod 353, the auxiliary tube 355, the first fixing groove 361 and the second fixing groove 362 are all simple in structure, so that the processing is easier. In addition, in order to further enhance the heat transfer of the heating rod 353, the surface of the heating rod 353 may be coated with a heat conductive grease.

In some embodiments, a first fixing groove 361 is formed at the center of the cold guide plate 351 in a front-rear direction; the center of the cold guide block 332 is opened with a second fixing groove 362 along the front-rear direction. Through the first fixing groove 361 which is arranged in the front-back direction in the center of the cold guide plate 351 in a penetrating mode, complete heating of the cold guide plate 351 from inside to outside and rapid heat transfer from the center area to the peripheral area can be achieved, defrosting efficiency is further improved, and the defrosting mode is particularly suitable for the ultralow-temperature environment of the Stirling refrigeration system. As shown in fig. 4, the first fixing groove 361 is formed at the center of the cold guide plate 351 to penetrate the front and rear thickness directions thereof; the second fixing groove 362 may be opened or not opened to penetrate through the center of the cooling block 332 in the front-rear thickness direction thereof.

In some embodiments, a plurality of first mounting holes 371 are formed on the cold guide plate 351 at intervals around the first fixing groove 361; a plurality of second mounting holes 372 are formed in the positions, corresponding to the plurality of first mounting holes 371, of the cold guide block 332; the fixing of the cold guide plate 351 and the cold guide block 332 is achieved by connecting the first mounting hole 371 and the second mounting hole 372 with a fixing member. As shown in fig. 5 and 6, six first mounting holes 371 are formed in the cooling guide plate 351 at regular intervals around the first fixing groove 361, and one second mounting hole 372 is formed in the front end surface of the cooling guide block 332 at positions corresponding to the six first mounting holes 371. Similarly, the second mounting hole 372 may or may not extend through the cold block 332. The fixing may be a screw, for example.

In some embodiments, the cooling guide ring 331 is provided with a plurality of third mounting holes 373 spaced in the front-rear direction; a plurality of fourth mounting holes 374 extending in the front-rear direction are formed in the positions of the cold guide block 332 corresponding to the plurality of third mounting holes 373; the fixing of the cold guide block 332 and the cold guide ring 331 is achieved by connecting the fourth mounting hole 374 and the third mounting hole 373 with a fixing member. As shown in fig. 5 and 6, the front end surface of the cold guiding ring 331 is unevenly provided with four third mounting holes 373 at intervals in the front-rear direction; a fourth mounting hole 374 is formed through the rear end surface of the cold guide block 332 at a position corresponding to the four third mounting holes 373 in the front-rear direction. The fourth mounting hole 374 may be a contoured hole having a rear inner diameter smaller than a front inner diameter such that the fastener is received in the fourth mounting hole 374 without requiring additional space for the fastener at the front face of the cold block 332. Similarly, the third mounting hole 373 may or may not extend through the cooling conductive ring 331. The fixing may be a screw, for example.

With continued reference to fig. 5 and 6, in some embodiments, the cold conducting ring 331 is a circular ring structure having a gap 330, including oppositely disposed first and second ends 3301, 3302; wherein the first end 3301 has a first fixing hole 3310 along the left-right direction, and the second end 3302 has a second fixing hole (not shown in the figure) along the left-right direction at a position corresponding to the first fixing hole 3310, so that the cold conduction ring 331 is sleeved on the cold end, and the fixing member is used to connect the first fixing hole 3310 and the second fixing hole to fix the cold conduction ring 331 and the cold end. By arranging the cold guiding ring 331 to have the structure of the gap 330, the cold guiding ring 331 can be conveniently fixed with the cold end. In addition, a plurality of cracks 3303 may be formed on the outer end surface of the cooling guide ring 331 so that the cooling guide ring 331 can also endure a certain deformation.

In some embodiments, the stirling cooler 300 of the refrigerator 100 according to the embodiment of the present invention may include a casing, a cylinder (not shown), a piston (not shown), a driving mechanism (not shown) for driving the piston to move, a heat dissipation fan 341, and a fin radiator 342. 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 configured to be driven by the driving mechanism to reciprocate within the cylindrical portion 302 to form a cold end of the stirling cooler 300 at an end of the cylindrical portion 302 remote from the main body portion 301 and a hot end of the stirling cooler 300 at an end of the cylindrical portion 302 close to the main body portion 301. An opening is formed in a side wall of the main body 301, and the heat dissipation fan 341 is disposed at the opening. The fin radiator 342 is disposed around the hot end and fixed to the body 301. The heat dissipation fan 341 is mainly used for heat dissipation of the main body portion 301, and the fin radiator 342 is mainly used for heat dissipation of the hot end. In the embodiment shown in fig. 2, the heat dissipation fan 341 is disposed on the left side wall of the main body portion 301. It is understood that the heat dissipation fan 341 may be disposed on the upper side wall or the right side wall of the main body portion 301. Since the device chamber 102 is generally opened with ventilation openings at both left and right sides thereof, it is preferable to provide the heat dissipation fan 341 on the left side wall of the main body portion 301 in the manner shown in fig. 2 in view of airflow.

The refrigerator 100 according to the embodiment of the present invention may further include: the vapor compression refrigeration system is used for providing cold energy for at least one storage compartment and comprises a compressor (not shown in the figure), a condenser (not shown in the figure), an evaporator (not shown in the figure) and the like. The vapor compression refrigeration system may supply cooling only to the normal compartment 111, or may supply cooling to the normal compartment 111 and the cryogenic compartment 112. The stirling cooler 300, compressor, and condenser may be laterally spaced within the device chamber 102, with the stirling cooler 300 located behind the cryogenic compartment 112. By arranging the stirling cooler 300, the compressor, and the condenser within the device compartment 102, the components of the refrigerator 100 may be arranged reasonably, compactly, and easily installed and maintained. The stirling cooler 300 may be secured within the device chamber 102 by a shock mount or the like.

Fig. 7 is an exploded schematic view of the double door 400 and the door frame 430 of the refrigerator 100 shown in fig. 1. Fig. 8 is a partially enlarged schematic view of fig. 7. In some embodiments, 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. 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 strip may be provided between the inner door 402 and the common 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. 7, 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. 8, 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. 8, 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 Stirling refrigeration system comprises a Stirling refrigerator, a cold guide piece and a heat exchanger, wherein one end of the cold guide piece is thermally connected with the cold end of the Stirling refrigerator, the other end of the cold guide piece is thermally connected with the heat exchanger, the heat exchanger is provided with a first fixing groove, and a second fixing groove is formed in the position, corresponding to the first fixing groove, of the cold guide piece; and

and the heating rod is configured to be inserted into the first fixing groove and the second fixing groove to be fixedly connected with the heat exchanger and the cold conduction piece in an inserting mode, and is used for providing heat required by defrosting of the heat exchanger.

2. The refrigerator according to claim 1,

the heat exchanger includes: the cooling guide plate is formed by extending forwards from the front surface of the cooling guide plate, and an airflow channel is defined between the adjacent cooling guide fins; wherein the cold guide plate is provided with the first fixing groove.

3. The refrigerator according to claim 2,

the cold guide piece comprises a cold guide ring and a cold guide block;

the cold guide ring is sleeved on the periphery of the cold end;

the front end of the cold guide block is fixed with the cold guide plate, the rear end of the cold guide block is fixed with the cold guide ring, and the second fixing groove is formed in the cold guide block.

4. The refrigerator according to claim 3,

the center of the cold guide plate is provided with the first fixing groove along the front-back direction in a penetrating manner;

the center of the cold guide block is provided with the second fixing groove along the front-back direction.

5. The refrigerator according to claim 4,

a plurality of first mounting holes in the front-back direction penetrate through the cold guide plate at intervals around the first fixing groove;

a plurality of second mounting holes along the front-back direction are formed in the positions, corresponding to the first mounting holes, on the cold guide block;

and fixing the cold guide plate and the cold guide block by connecting the first mounting hole and the second mounting hole through a fixing piece.

6. The refrigerator according to claim 3,

a plurality of third mounting holes in the front-back direction are formed in the cold guide ring at intervals;

a plurality of fourth mounting holes along the front-back direction penetrate through the positions, corresponding to the plurality of third mounting holes, on the cold guide block;

and fixing the cold guide block and the cold guide ring by connecting the fourth mounting hole and the third mounting hole through a fixing piece.

7. The refrigerator according to claim 3,

the cold guide ring is of a circular ring structure with a notch and comprises a first end part and a second end part which are oppositely arranged; the first end is provided with a first fixing hole in the left-right direction, and the second end is provided with a second fixing hole in the left-right direction at a position corresponding to the first fixing hole, so that the cold guide ring is sleeved on the cold end, and the first fixing hole and the second fixing hole are connected through a fixing piece to fix the cold guide ring and the cold end.

8. The refrigerator of claim 2, further comprising:

an auxiliary pipe configured to be inserted into the first fixing groove and the second fixing groove;

the heating rod is inserted into the auxiliary pipe, and one end of the heating rod, which is close to the cold guide fin, is connected with a lead.

9. The refrigerator according to claim 8,

the first fixing groove and the second fixing groove are both cylindrical structures;

the auxiliary pipe is a cylindrical structure with a notch;

the heating rod is of a cylindrical structure.

10. The refrigerator according to claim 1,

the Stirling refrigerator comprises a shell, a cylinder, a piston, a driving mechanism, a heat dissipation fan and a fin radiator; the machine shell comprises a main body part and a cylindrical part, the driving mechanism is arranged in the main body part, the piston is configured to be driven by the driving mechanism to reciprocate in the cylindrical part, so that the cold end is formed at one end of the cylindrical part far away from the main body part, and the hot end is formed at one end close to the main body part; an opening is formed in the side wall of the main body part, and the heat dissipation fan is arranged at the opening; the fin radiator is arranged on the periphery of the hot end and fixed with the main body part.

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