Refrigerators, refrigeration systems and magnetic cold storage devices

Abstract

The present invention relates to a refrigerator, a refrigeration system and a magnetic cold storage device, wherein the magnetic cold storage device comprises a magnetic thermal element and a heat sink. The heat exchange part of the heat sink is arranged on the magnetic thermal element. During refrigeration, a refrigerant is introduced into the first heat exchange channel of the magnetic thermal element, and demagnetization causes the magnetic thermal element to absorb heat. The refrigerant in the first heat exchange channel exchanges heat with the magnetic thermal element to achieve cooling of the refrigeration element, and a refrigeration effect is achieved through a cold end heat exchanger. Excitation causes the magnetic thermal element to release heat, and the introduction of the refrigerant into the first heat exchange channel is stopped. The heat of the magnetic thermal element is transferred to the heat exchange part, and the heat transferred to the heat exchange part is further transferred to the heat sink connected to the heat exchange part. Since the heat sink is located on the side of the heat exchange part away from the magnetic thermal element, the heat of the heat sink is prevented from being further transferred to the magnetic thermal element, which facilitates the dissipation of heat on the heat sink, avoids affecting the refrigeration effect of the magnetic thermal element during the demagnetization process, and thus ensures the refrigeration efficiency of the refrigeration system and the refrigeration effect of the refrigerator.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration structures, and in particular to a refrigerator, a refrigeration system and a magnetic cold storage device. Background Art

[0002] The magnetic refrigeration device uses the magnetocaloric effect of magnetic materials to achieve the refrigeration process. Since the magnetic material generates heat when it is magnetized and cools when it is demagnetized, the traditional magnetic refrigeration device achieves the refrigeration of the refrigerant by heat alternation with the refrigerant when the magnetic material is demagnetized. When the magnetic material is magnetized, the circulation of the refrigerant is stopped, thereby ensuring the refrigeration effect. However, the heat dissipation efficiency of the magnetic material is low, which affects the refrigeration efficiency of the magnetic material during the next demagnetization process. Summary of the invention

[0003] Based on this, it is necessary to provide a refrigerator, a refrigeration system and a magnetic cold storage device that can effectively ensure the heat dissipation and refrigeration efficiency of magnetic materials in order to solve the above problems.

[0004] A magnetic cold storage device, comprising:

[0005] The magnetic thermal element is formed with a first heat exchange channel; and

[0006] The heat dissipation element comprises a heat dissipation part and a heat exchange part. The heat exchange part is arranged on the magnetic thermal element. The heat dissipation part is connected to the heat exchange part and is located on a side of the heat exchange part away from the magnetic thermal element.

[0007] When the magnetic cold storage device is in use, the heat exchange part of the heat sink is arranged on the magnetic thermal part. When cooling is required, a refrigerant is introduced into the first heat exchange channel of the magnetic thermal part to demagnetize the magnetic thermal part, so that the magnetic moment in the magnetic thermal part changes from ordered to disordered along the magnetic field direction, and the magnetic thermal part absorbs heat at this time. The refrigerant in the first heat exchange channel can exchange heat with the magnetic thermal part to achieve cooling of the refrigeration part, thereby achieving a cooling effect. In the process of exciting the magnetic thermal part, the magnetic moment of the magnetic thermal part changes from disordered to ordered along the magnetic field direction, and the magnetic thermal part releases heat to the outside, and the refrigerant is stopped from entering the first heat exchange channel. The heat of the magnetic thermal part can be effectively transferred to the heat exchange part, and the heat transferred to the heat exchange part can be further transferred to the heat dissipation part connected to the heat exchange part. Since the heat dissipation part is located on the side of the heat exchange part away from the magnetic thermal part, the heat of the heat dissipation part is prevented from being further transferred to the magnetic thermal part, which facilitates the loss of heat on the heat dissipation part and avoids affecting the cooling effect of the demagnetization process.

[0008] The technical solution is further described below:

[0009] In one of the embodiments, a plurality of heat dissipation fins arranged at intervals are provided on the outer wall of the heat dissipation portion.

[0010] In one embodiment, a second heat exchange channel is formed in the heat exchange part, and the second heat exchange channel is filled with a heat exchange medium. A heat dissipation channel is formed in the heat dissipation part, and the heat dissipation channel is connected with the second heat exchange channel so that the heat exchange medium can flow from the second heat exchange channel into the heat dissipation channel.

[0011] In one of the embodiments, the height of the heat exchange medium in the second heat exchange channel is greater than or equal to the height of the magnetic thermal component.

[0012] In one embodiment, the heat dissipation part is arranged at a height higher than the heat exchange part, and the heat exchange medium is a medium that is easily volatile when heated.

[0013] In one embodiment, the heat dissipation portion is a tubular structure, and the heat dissipation portion is folded away from the portion of the magnetic thermal element.

[0014] In one embodiment, the heat sink also includes a reflux portion, which is arranged between the heat dissipation portion and the heat exchange portion. A reflux channel is formed in the reflux portion, one end of the reflux channel is connected to the heat dissipation channel, and the other end of the reflux channel is connected to the second heat exchange channel. The reflux channel, the heat dissipation channel and the second heat exchange channel are connected to form a heat dissipation circulation loop.

[0015] In one of the embodiments, the cross-sectional size of the reflux channel tends to decrease toward the direction approaching the heat exchange portion.

[0016] In one of the embodiments, the heat sink further includes a mounting portion, the mounting portion is disposed on the heat exchange portion, a mounting hole is formed on the mounting portion, and the magnetic thermal element is inserted into the mounting hole.

[0017] In one embodiment, the number of the heat sinks is at least two, and at least two of the heat sinks are arranged at intervals around the outer circumference of the magnetic thermal element, and the heat exchange portion of each of the heat sinks is arranged on the magnetic thermal element.

[0018] In one of the embodiments, the magnetic cold accumulator further includes a heat exchange tube, and the heat exchange tube is connected to the first heat exchange channel.

[0019] In one of the embodiments, the magnetic thermal element is disposed in the heat exchange tube, and the heat exchange part is disposed on the heat exchange tube.

[0020] A refrigeration system, comprising:

[0021] A magnetic cold storage device as described above; and

[0022] The cold end heat exchanger is connected to the first heat exchange channel of the magnetic thermal element.

[0023] A refrigerator comprises the refrigeration system as described above.

[0024] When the refrigerator is in use, the heat exchange part of the heat sink is arranged on the magnetocaloric part. When refrigeration is required, a refrigerant is introduced into the first heat exchange channel of the magnetocaloric part to demagnetize the magnetocaloric part, so that the magnetic moment in the magnetocaloric part changes from ordered to disordered along the magnetic field direction, and the magnetocaloric part absorbs heat at this time. The refrigerant in the first heat exchange channel can exchange heat with the magnetocaloric part to achieve cooling of the refrigeration part. The refrigerant enters the cold end heat exchanger and achieves a refrigeration effect through the cold end heat exchanger. In the process of excitation of the magnetocaloric part, the magnetic moment of the magnetocaloric part changes from disordered to ordered along the magnetic field direction. At this time, the magnetocaloric part releases heat to the outside, and the refrigerant is stopped from entering the first heat exchange channel. The heat of the magnetocaloric part can be effectively transferred to the heat exchange part, and the heat transferred to the heat exchange part can be further transferred to the heat dissipation part connected to the heat exchange part. Since the heat dissipation part is located on the side of the heat exchange part away from the magnetocaloric part, the heat of the heat dissipation part is prevented from being further transferred to the magnetocaloric part, which facilitates the loss of heat on the heat dissipation part and avoids affecting the refrigeration effect of the demagnetization process. The magnetic cold storage device can effectively ensure the refrigeration effect on the refrigerant during the demagnetization process, thereby ensuring the refrigeration efficiency of the refrigeration system and the refrigeration effect of the refrigerator.

[0025] In one embodiment, the refrigerator is a car refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a magnetic cold storage device in one embodiment;

[0027] Figure 2 for Figure 1 Sectional view along line AA.

[0028] Description of reference numerals:

[0029] 10. Magnetic cold storage device, 100. Magnetic thermal element, 110. First heat exchange channel, 200. Heat dissipation element, 210. Heat dissipation portion, 212. Heat dissipation channel, 214. Heat dissipation fins, 220. Heat exchange portion, 222. Second heat exchange channel, 230. Heat exchange medium, 240. Reflux portion, 242. Reflux channel, 250. Mounting portion, 252. Mounting hole, 300. Heat exchange tube. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The various technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] See also Figure 1 and Figure 2 The refrigeration system in one embodiment includes a magnetic cold storage device 10 and a cold end heat exchanger. Refrigeration is achieved through the magnetic cold storage device 10, and heat exchange is achieved through the cold end heat exchanger.

[0034] Specifically, the magnetic cold storage device 10 includes a magnetic thermal element 100 and a heat sink 200, and a first heat exchange channel 110 is formed in the magnetic thermal element 100. The cold end heat exchanger is connected to the first heat exchange channel 110 of the magnetic thermal element 100. The heat sink 200 includes a heat dissipation portion 210 and a heat exchange portion 220, and the heat exchange portion 220 is disposed on the magnetic thermal element 100, and the heat dissipation portion 210 is connected to the heat exchange portion 220 and is located on the side of the heat exchange portion 220 away from the magnetic thermal element 100.

[0035] When the above-mentioned refrigeration system is in use, the heat exchange portion 220 of the heat sink 200 is arranged on the magnetic thermal element 100. When refrigeration is required, a refrigerant is introduced into the first heat exchange channel 110 of the magnetic thermal element 100. In the process of demagnetizing the magnetic thermal element 100, the magnetic moment in the magnetic thermal element 100 changes from ordered to disordered along the direction of the magnetic field, and the magnetic thermal element 100 absorbs heat at this time. The refrigerant in the first heat exchange channel 110 can exchange heat with the magnetic thermal element 100 to achieve cooling of the refrigeration element. The refrigerant enters the cold end heat exchanger, and a cooling effect is achieved through the cold end heat exchanger. In the process of exciting the magnetic thermal element 100, the magnetic moment of the magnetic thermal element 100 changes from disordered to ordered along the direction of the magnetic field, and the magnetic thermal element 100 releases heat to the outside, and the refrigerant is stopped from being introduced into the first heat exchange channel 110. The heat of the magnetic thermal element 100 can be effectively transferred to the heat exchange part 220, and the heat transferred to the heat exchange part 220 can be further transferred to the heat dissipation part 210 connected to the heat exchange part 220. Since the heat dissipation part 210 is located on the side of the heat exchange part 220 away from the magnetic thermal element 100, the heat of the heat dissipation part 210 is prevented from being further transferred to the magnetic thermal element 100, which facilitates the dissipation of heat on the heat dissipation part 210 and avoids affecting the refrigeration effect of the demagnetization process. The above-mentioned magnetic cold storage device 10 can effectively ensure the refrigeration effect of the refrigerant during the demagnetization process, thereby ensuring the refrigeration efficiency of the refrigeration system.

[0036] In order to achieve heat dissipation of the magnetic thermal element 100, the traditional solution is to set a heat dissipation flow path. When cooling, the first heat exchange channel 110 of the magnetic thermal element 100 is connected to the cold end heat exchanger. When heating, the reversing valve is used to connect the heat dissipation flow path to the first heat exchange channel 110. Therefore, the first heat exchange channel 110 of the magnetic thermal element 100 is a common channel for the cooling and heating processes. Furthermore, when switching through the reversing valve, part of the refrigerant is left in the first heat exchange channel 110. When the magnetic thermal element 100 switches from the heating state to the cooling state, the refrigerant in the heat dissipation flow path will remain in the first heat exchange channel 110, which will cause the magnetic thermal element 100 to first refrigerate the residual refrigerant, thereby affecting the cooling effect on the refrigerant in the cold end heat exchanger.

[0037] In one embodiment, a second heat exchange channel 222 is formed in the heat exchange portion 220, and the second heat exchange channel 222 is filled with a heat exchange medium 230. A heat dissipation channel 212 is formed in the heat dissipation portion 210, and the heat dissipation channel 212 is connected with the second heat exchange channel 222, so that the heat exchange medium 230 can flow from the second heat exchange channel 222 into the heat dissipation channel 212. By forming the second heat exchange channel 222 and the heat dissipation channel 212, the circulation of the heat exchange medium 230 is facilitated, and the heat generated by the magnetic thermal component 100 can be effectively taken away by utilizing the flow of the heat exchange medium 230 in the second heat exchange channel 222 and the heat dissipation channel 212, thereby improving the heat dissipation efficiency of the magnetic thermal component 100.

[0038] Specifically, the height of the heat exchange medium 230 in the second heat exchange channel 222 is greater than or equal to the height of the magnetic thermal component 100. Since the heat exchange portion 220 is disposed on the magnetic thermal component 100, by making the height of the heat exchange medium 230 in the second heat exchange channel 222 greater than or equal to the height of the magnetic thermal component 100, the heat-generating portion of the magnetic thermal component 100 can fully exchange heat with the heat exchange medium 230, thereby effectively improving the heat dissipation efficiency of the magnetic thermal component 100.

[0039] In this embodiment, the heat dissipation part 210 is arranged at a higher height than the heat exchange part 220. The heat exchange medium 230 is a medium that is easily volatile when heated. Since the heat exchange medium 230 is a medium that is easily volatile when heated, the heat exchange medium 230 is volatilized from liquid to gaseous when heat is exchanged with the magnetic thermal element 100. Since the heat dissipation part 210 is arranged at a higher height than the heat exchange part 220, the gaseous heat exchange medium 230 can enter the heat dissipation channel 212 of the heat dissipation part 210, and after being cooled in the heat dissipation channel 212 and becoming liquid, it flows back to the second heat exchange channel 222, thereby realizing the circulation heat dissipation of the heat exchange medium 230.

[0040] In one embodiment, the heat exchange medium 230 may be a medium such as Freon or ethylene.

[0041] In one embodiment, the heat dissipation portion 210 is a tubular structure, and the portion of the heat dissipation portion 210 away from the magnetic thermal element 100 is folded. By folding the heat dissipation portion 210, the length of the heat dissipation channel 212 can be effectively extended within a certain space, thereby extending the time for the heat exchange medium 230 to flow in the heat dissipation channel 212, thereby increasing the heat dissipation time and thus increasing the heat dissipation efficiency. In other embodiments, the heat dissipation portion 210 may not be folded.

[0042] In one embodiment, a plurality of heat dissipation fins 214 are disposed at intervals on the outer wall of the heat dissipation portion 210. The heat dissipation fins 214 can further improve the heat dissipation efficiency of the heat dissipation portion 210, thereby improving the heat dissipation efficiency of the magnetic thermal element 100.

[0043] In one embodiment, the heat sink 200 further includes a reflux portion 240, which is disposed between the heat sink 210 and the heat exchange portion 220. A reflux channel 242 is formed in the reflux portion 240. One end of the reflux channel 242 is connected to the heat sink 212, and the other end of the reflux channel 242 is connected to the second heat exchange channel 222. The reflux channel 242, the heat sink 212, and the second heat exchange channel 222 are connected to form a heat dissipation circulation loop. The reflux portion 240 is provided to form the reflux channel 242, so that the heat exchange medium 230 that is cooled from the gaseous state to the liquid state in the heat sink 212 can flow back to the second heat exchange channel 222 through the reflux channel 242. Since the second heat exchange channel 222, the heat dissipation channel 212 and the reflux channel 242 are interconnected to form a heat dissipation circulation reflux, thereby forming a flow circulation loop of the heat exchange medium 230, the heat exchange medium 230 is heated and vaporized in the second heat exchange channel 222 and enters the heat dissipation channel 212. After being cooled and liquefied in the heat dissipation channel 212, it flows back to the second heat exchange channel 222 through the reflux channel 242, thereby effectively improving the heat exchange efficiency.

[0044] Specifically, the size of the cross section of the reflux channel 242 tends to decrease in the direction approaching the heat exchange part 220. Since the other end of the reflux channel 242 is connected to the heat exchange part 220, one end of the reflux part 240 tends to approach the heat exchange part 220 in the direction of the other end, which causes the heat exchange medium 230 in the reflux part 240 close to the heat exchange part 220 to absorb part of the heat emitted by the heat exchange part 220 and the magnetic thermal element 100. By reducing the size of the reflux channel 242 close to the heat exchange part 220, the heat absorbed by the heat exchange medium 230 in the reflux channel 242 can be reduced, thereby reducing the gasification amount of the heat exchange medium 230 in the reflux channel 242, and improving the heat exchange efficiency of the heat exchange medium 230 in the second heat exchange channel 222.

[0045] In this embodiment, the cross-sectional dimension of the return channel 242 gradually decreases toward the heat exchange portion 220. Of course, in another embodiment, the cross-sectional dimension of the return channel 242 is larger at one end of the return channel 242 and smaller at the other end of the return channel 242.

[0046] In other embodiments, the cross-sectional dimension of the return channel 242 may be smaller than the cross-sectional dimension of the second heat exchange channel 222. The cross-sectional dimension of the return channel 242 may be smaller than the cross-sectional dimension of the heat dissipation channel 212.

[0047] In this embodiment, the reflux portion 240 gradually approaches the heat exchange portion 220 from one end to the other end. In another embodiment, when the reflux portion 240 is provided, the portion of the reflux portion 240 close to the heat exchange portion 220 may be provided at a position away from the heat exchange portion 220. For example, the reflux portion 240 may be provided in an "L" shape, or a structure approximately in an "L" shape.

[0048] In this embodiment, the reflux portion 240, the heat dissipation portion 210 and the heat exchange portion 220 are integrally formed, and the reflux channel 242, the heat dissipation channel 212 and the second heat exchange channel 222 are closed circulation channels, which effectively avoids leakage of the heat exchange medium 230 and improves heat exchange efficiency.

[0049] In one embodiment, the heat sink 200 further includes a mounting portion 250, which is disposed on the heat exchange portion 220. The mounting portion 250 is provided with a mounting hole 252, and the magnetic thermal element 100 is inserted into the mounting hole 252. The mounting portion 250 can facilitate the arrangement of the heat exchange portion 220 on the magnetic thermal element 100, thereby facilitating heat exchange between the heat exchange portion 220 and the magnetic thermal element 100.

[0050] In this embodiment, the mounting portion 250 is integrally formed on the heat exchange portion 220 , thereby improving the stability of the mounting portion 250 disposed on the heat exchange portion 220 .

[0051] In this embodiment, the heat sink 200 is made of a material with good heat dissipation performance, which facilitates the heat generated by the magnetic thermal element 100 to be transferred to the heat exchange part 220, and facilitates the heat dissipation of the heat dissipation part 210. For example, the heat sink 200 is made of copper, or can also be made of other materials with good heat dissipation performance.

[0052] In one embodiment, the number of heat sinks 200 is at least two, and at least two heat sinks 200 are arranged at intervals around the outer periphery of the magnetic thermal element 100, and the heat exchange portion 220 of each heat sink 200 is arranged on the magnetic thermal element 100. By providing at least two heat sinks 200, the heat dissipation efficiency of the magnetic thermal element 100 can be effectively improved.

[0053] In this embodiment, different heat sinks 200 share a mounting portion 250, and the heat exchange portions 220 of different heat sinks 200 are disposed on a mounting portion 250. Different heat sinks 200 are effectively connected together through a mounting portion 250, which facilitates the installation of different heat sinks 200 on the magnetic thermal element 100.

[0054] In one embodiment, different heat sinks 200 are evenly arranged around the magnetic thermal element 100, thereby improving the heat dissipation uniformity of the different heat sinks 200, thereby improving the heat dissipation efficiency. In this embodiment, there are two heat sinks 200, and the two heat sinks 200 are symmetrically arranged relative to the magnetic thermal element 100. In another embodiment, the number of heat sinks 200 can also be one, three, or other numbers.

[0055] In other embodiments, different heat sinks 200 may also be arranged in an asymmetric structure, for example, they may be arranged according to actual installation space.

[0056] In this embodiment, the magnetic cold storage device 10 further includes a heat exchange tube 300, which is connected to the first heat exchange channel 110. The heat exchange tube 300 facilitates the flow of the refrigerant in the first heat exchange channel 110. Specifically, the cold end heat exchanger is connected to the first heat exchange channel 110 through the heat exchange tube 300. This facilitates the refrigerant to flow to the cold end heat exchanger through the heat exchange tube 300, and the cooling effect is achieved through the cold end heat exchanger.

[0057] In this embodiment, the magnetic thermal element 100 is disposed in the heat exchange tube 300, and the heat exchange portion 220 is disposed on the heat exchange tube 300. By disposing the magnetic thermal element 100 in the heat exchange tube 300, the refrigerant in the heat exchange tube 300 can be more fully in contact with the magnetic thermal element 100, thereby effectively improving the refrigeration efficiency. Specifically, the heat exchange tube 300 is penetrated in the mounting hole 252.

[0058] In other embodiments, the heat exchange tube 300 may also be inserted into the first heat exchange channel 110 of the magnetic thermal element 100 , as long as heat exchange between the magnetic thermal element 100 and the refrigerant in the heat exchange tube 300 is convenient.

[0059] The refrigerator in one embodiment includes the refrigeration system in any of the above embodiments, and realizes the refrigeration effect by utilizing the principle of heat absorption during the demagnetization process of the magnetic thermal element 100. At the same time, the heat dissipation element 200 is utilized to effectively realize the heat dissipation of the magnetic thermal element 100 during the heating process, thereby ensuring the refrigeration efficiency of the magnetic thermal element 100 during the refrigeration process.

[0060] In this embodiment, the refrigerator is a car refrigerator. Of course, in other embodiments, the refrigerator may also be a household refrigerator. Alternatively, the refrigeration system may also be used in other occasions where refrigeration is required.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A magnetic cold storage device, characterized in that: include: The magnetic thermal element is formed with a first heat exchange channel; and The heat dissipation element comprises a heat dissipation part and a heat exchange part, wherein the heat exchange part is arranged on the magnetic thermal element, and the heat dissipation part is connected to the heat exchange part and is located on a side of the heat exchange part away from the magnetic thermal element; A second heat exchange channel is formed in the heat exchange portion, and a heat exchange medium is filled in the second heat exchange channel. A heat dissipation channel is formed in the heat dissipation portion, and the heat dissipation channel is connected to the second heat exchange channel, so that the heat exchange medium can flow from the second heat exchange channel into the heat dissipation channel; The heat sink also includes a reflux portion, which is disposed between the heat dissipation portion and the heat exchange portion, and a reflux channel is formed in the reflux portion, one end of the reflux channel is connected to the heat dissipation channel, and the other end of the reflux channel is connected to the second heat exchange channel, and the reflux channel, the heat dissipation channel and the second heat exchange channel are connected to form a heat dissipation circulation loop; A plurality of heat dissipation fins arranged at intervals are arranged on the outer wall of the heat dissipation portion.

2. The magnetic cold storage device according to claim 1, characterized in that: The height of the heat exchange medium in the second heat exchange channel is greater than or equal to the height of the magnetic thermal component.

3. The magnetic cold storage device according to claim 1, characterized in that: The heat dissipation part is arranged at a height higher than the heat exchange part, and the heat exchange medium is a medium that is easily volatile when heated.

4. The magnetic cold storage device according to claim 3, characterized in that: The heat dissipation portion is a tubular structure, and the heat dissipation portion is folded away from the part of the magnetic thermal element.

5. The magnetic cold storage device according to claim 1, characterized in that: The cross-sectional size of the return channel tends to decrease toward the direction approaching the heat exchange portion.

6. The magnetic cold storage device according to any one of claims 1 to 5, characterized in that: The heat sink also includes a mounting portion, which is disposed on the heat exchange portion. A mounting hole is provided on the mounting portion, and the magnetic thermal element is inserted into the mounting hole.

7. The magnetic cold storage device according to any one of claims 1 to 5, characterized in that: The number of the heat sinks is at least two, and at least two of the heat sinks are arranged at intervals around the outer circumference of the magnetic thermal element. The heat exchange portion of each of the heat sinks is arranged on the magnetic thermal element.

8. The magnetic cold storage device according to any one of claims 1 to 5, characterized in that: It also includes a heat exchange tube, which is connected to the first heat exchange channel.

9. The magnetic cold storage device according to claim 8, characterized in that: The magnetic thermal element is arranged in the heat exchange tube, and the heat exchange part is arranged on the heat exchange tube.

10. A refrigeration system, characterized in that: include: The magnetic cold storage device according to any one of claims 1 to 9; and The cold end heat exchanger is connected to the first heat exchange channel of the magnetic thermal element.

11. A refrigerator, characterized in that: Comprising the refrigeration system as claimed in claim 10.

12. The refrigerator according to claim 11, characterized in that: The refrigerator is a vehicle-mounted refrigerator.

Images