Magnetic refrigeration system and magnetic refrigerator having the same

Abstract

The present invention provides a magnetic refrigeration system and a magnetic refrigerator having the same, wherein the magnetic refrigeration system comprises: a tray, which is rotatably arranged; a first magnet assembly, which is arranged on the tray so that the tray drives the first magnet assembly to rotate; the first magnet assembly has a first air gap; a second magnet assembly, which is arranged on the tray so that the tray drives the second magnet assembly to rotate; the second magnet assembly is arranged at intervals from the first magnet assembly to form a second air gap; a first cold storage bed, which is arranged in the first air gap so that the magnetic working medium in the first cold storage bed is excited and demagnetized when the first magnet assembly rotates relative to the first cold storage bed; and a second cold storage bed, which is arranged in the second air gap so that the magnetic working medium in the second cold storage bed is excited and demagnetized when the first magnet assembly and the second magnet assembly rotate relative to the second cold storage bed. The magnetic refrigeration system of the present invention solves the problem of low magnet utilization in the magnetic refrigeration system in the prior art.

Description

Technical Field

[0001] The present invention relates to magnetic refrigeration technology, and in particular to a magnetic refrigeration system and a magnetic refrigerator having the same. Background Art

[0002] Magnetic refrigeration technology is a solid-state refrigeration method based on magnetocaloric effect. It uses environmentally friendly media such as water as heat transfer fluid and has the characteristics of zero GWP, zero ODP, intrinsic high efficiency, low noise and low vibration. Compared with the low-temperature field, magnetic refrigeration has a broader application prospect in the room temperature range, such as household refrigerators, air conditioners, medical and health care, etc. Therefore, in the past decade or so, the research and development of room temperature magnetic refrigeration technology has received widespread attention from countries around the world, and has achieved some world-renowned achievements.

[0003] The magnetic refrigerator mainly includes five parts: a magnetic field system that generates a changing magnetic field, an active magnetic working fluid bed (for placing magnetocaloric materials), a cold and hot end heat exchanger, a heat exchange fluid circulation path, and a matching power drive device. Among them, the magnetic field system is divided into: electromagnets, permanent magnets, and superconducting magnets according to the working principle. In order to make room temperature magnetic refrigeration practical and commercial, permanent magnets are often used in the industry. Among them, permanent magnet magnetic refrigerators are divided into rotary and reciprocating types according to the movement mode. Compared with reciprocating magnetic refrigerators, rotary types are selected to improve the efficiency of magnetic refrigerators. Rotary magnetic refrigerators are further divided into rotating magnet type and rotating working fluid bed type. Since the rotating working fluid bed type magnetic refrigerator involves a dynamic sealing device made to solve the problem of pipeline winding, which has mechanical friction loss and fluid leakage, the rotation of the magnetic field on the static magnetocaloric material (working fluid bed) is a more effective solution, so the permanent magnet rotary magnetic refrigerator is preferred. Among them, magnets and cold storage beds are key components of magnetic refrigerators, which determine the overall performance and efficiency of magnetic refrigerators.

[0004] However, the magnets of current magnetic refrigerators occupy the majority of the volume of the entire machine. The magnets are large in size and have low utilization, which makes the unit too large. At the same time, if the magnets are rotating parts, the large mass and volume will cause the motor power of the mechanical system to be too large, wasting electricity. In addition, the magnets are also the most expensive parts in the magnetic refrigerator. Reducing the amount of magnets will also help reduce the cost of the entire machine. Summary of the invention

[0005] The main purpose of the present invention is to provide a magnetic refrigeration system and a magnetic refrigerator having the same, so as to solve the problem of low magnet utilization rate in the magnetic refrigeration system in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a magnetic refrigeration system, comprising: a tray, which is rotatably arranged; a first magnet assembly, which is arranged on the tray so that the tray drives the first magnet assembly to rotate; the first magnet assembly has a first air gap; a second magnet assembly, which is arranged on the tray so that the tray drives the second magnet assembly to rotate; the second magnet assembly is spaced apart from the first magnet assembly to form a second air gap; a first cold storage bed, which is arranged in the first air gap so as to excite and demagnetize the magnetic working medium in the first cold storage bed when the first magnet assembly rotates relative to the first cold storage bed; and a second cold storage bed, which is arranged in the second air gap so as to excite and demagnetize the magnetic working medium in the second cold storage bed when the first magnet assembly and the second magnet assembly rotate relative to the second cold storage bed.

[0007] Further, the first air gap extends in a horizontal direction, and the second air gap extends in a vertical direction.

[0008] Further, the first magnet assembly includes a first magnet and a second magnet, the first magnet and the second magnet are arranged at an interval to form a first air gap, and the second magnet is arranged above the first magnet.

[0009] Furthermore, the magnetic refrigeration system also includes: a first magnetic focusing plate, which is arranged on the end surface of the first magnet close to the second magnet; and / or, a second magnetic focusing plate, which is arranged on the end surface of the second magnet close to the first magnet.

[0010] Furthermore, the first magnet assembly also includes a third magnet, which has a first end face and a second end face that are oppositely arranged along the radial direction of the tray, the first end face is connected to the second magnet, and the second end face is oppositely arranged to the second magnet assembly to form a second air gap.

[0011] Furthermore, the third magnet has a third end face and a fourth end face that are relatively arranged in the vertical direction; the first magnet assembly also includes a fourth magnet, which is clamped between the first magnet and the third magnet; wherein the fourth magnet has a first connecting surface and a second connecting surface, the first connecting surface is connected to the first magnet, and the second connecting surface is connected to the third end face.

[0012] Furthermore, the first magnet has a fifth end face and a sixth end face that are oppositely arranged in the vertical direction, and the fifth end face is arranged on the side of the sixth end face away from the second magnet; the third magnet also has a third connecting surface, and one end of the third connecting surface connected to the first connecting surface is connected to the fifth end face; one end of the third connecting surface connected to the second connecting surface is connected to the second end face; wherein a first magnetic resistance plate is arranged on the third connecting surface.

[0013] Furthermore, the magnetic refrigeration system also includes: a third magnetic focusing plate, which is arranged on the second end face; and / or a fourth magnetic focusing plate, which is arranged on the end face of the second magnet assembly opposite to the second end face.

[0014] Furthermore, the tray includes a rotating shaft, and the second magnet assembly is connected to the rotating shaft.

[0015] Furthermore, the tray also includes ribs, and the first magnet is connected to the ribs.

[0016] Furthermore, there are multiple first magnet assemblies; there are multiple second magnet assemblies, each of which is connected to the rotating shaft, and the multiple second magnet assemblies are arranged around the circumference of the rotating shaft; the multiple first magnet assemblies are arranged in a one-to-one correspondence with the multiple second magnet assemblies, and a second air gap is formed between each first magnet assembly and the corresponding second magnet assembly; there are multiple first cold storage beds, the multiple first cold storage beds are arranged in a one-to-one correspondence with the multiple first magnet assemblies, and each first cold storage bed is arranged in the first air gap of the corresponding first magnet assembly; there are multiple second cold storage beds, the multiple second cold storage beds are arranged in a one-to-one correspondence with the multiple second air gaps, and each second cold storage bed is arranged in the corresponding second air gap.

[0017] Furthermore, a second magnetic resistance plate is disposed between two adjacent second magnet assemblies.

[0018] Furthermore, there are multiple ribs, and the multiple ribs are arranged in a one-to-one correspondence with the multiple first magnet assemblies, and each first magnet assembly is arranged on a corresponding rib; the magnetic refrigeration system also includes: multiple sub-magnetic blocks, each sub-magnetic block is connected to the rotating shaft, the multiple sub-magnetic blocks are arranged in a one-to-one correspondence with the multiple ribs, and each sub-magnetic block is connected to the corresponding ribs.

[0019] Furthermore, the magnetic refrigeration system further includes: a cold storage bed bracket, and the first cold storage bed and the second cold storage bed are both fixedly arranged on the cold storage bed bracket.

[0020] According to another aspect of the present invention, a magnetic refrigerator is provided, comprising a magnetic refrigeration system, wherein the magnetic refrigeration system is the magnetic refrigeration system described above.

[0021] The magnetic refrigeration system of the present invention relates to the field of magnetic refrigeration, mainly to a magnetic field generating device of a rotary magnetic refrigerator. The magnetic refrigeration system includes a tray, a first magnet assembly, a second magnet assembly, a first cold storage bed and a second cold storage bed. The magnetic refrigeration system is provided with two air gaps and the two cold storage beds are placed in the two air gaps respectively. Under the condition of the same magnet dosage, the magnetic entropy change efficiency can be doubled, thereby improving the magnet utilization rate, making the mass of the magnet assembly smaller and the structure more compact, and can effectively reduce the overall machine cost of the magnetic refrigerator, which has a great beneficial effect on the industrialization and commercialization of the magnetic refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic structural diagram of an embodiment of a magnetic refrigeration system according to the present invention is shown;

[0024] Figure 2 A schematic structural diagram of a first magnet assembly of a magnetic refrigeration system according to the present invention is shown;

[0025] Figure 3 A schematic structural diagram of a second magnet assembly of a magnetic refrigeration system according to the present invention is shown;

[0026] Figure 4 A top view of a second magnet assembly of a magnetic refrigeration system according to the present invention is shown;

[0027] Figure 5 A partial enlarged view of a magnetic refrigeration system according to the present invention is shown;

[0028] Figure 6 A schematic structural diagram of a first magnet assembly and a second magnet assembly of a magnetic refrigeration system according to the present invention is shown;

[0029] Figure 7 A schematic structural diagram of a first magnet and a tray of a magnetic refrigeration system according to the present invention is shown;

[0030] Figure 8 A top view of a second magnet assembly and a tray of a magnetic refrigeration system according to the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Tray; 11. Rotating shaft; 12. Ribs; 20. First magnet assembly; 21. First air gap; 22. First magnet; 23. Second magnet; 24. Third magnet; 25. Fourth magnet; 30. Second magnet assembly; 31. Second air gap; 40. First cold storage bed; 50. Second cold storage bed; 60. First magnetic collecting plate; 70. Second magnetic collecting plate; 80. First magnetic resistance plate; 90. Third magnetic collecting plate; 100. Fourth magnetic collecting plate; 110. Second magnetic resistance plate; 120. Magnetic separation block; 130. Cold storage bed bracket. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] The present invention provides a magnetic refrigeration system, please refer to Figures 1 to 8 , including: a tray 10, which is rotatably arranged; a first magnet assembly 20, which is arranged on the tray 10, so that the tray 10 drives the first magnet assembly 20 to rotate; the first magnet assembly 20 has a first air gap 21; a second magnet assembly 30, which is arranged on the tray 10, so that the tray 10 drives the second magnet assembly 30 to rotate; the second magnet assembly 30 is spaced from the first magnet assembly 20 to form a second air gap 31; a first cold storage bed 40, which is arranged in the first air gap 21, so as to excite and demagnetize the magnetic working medium in the first cold storage bed 40 when the first magnet assembly 20 rotates relative to the first cold storage bed 40; a second cold storage bed 50, which is arranged in the second air gap 31, so as to excite and demagnetize the magnetic working medium in the second cold storage bed 50 when the first magnet assembly 20 and the second magnet assembly 30 rotate relative to the second cold storage bed 50.

[0037] The magnetic refrigeration system of the present invention relates to the field of magnetic refrigeration, mainly to a magnetic field generating device of a rotary magnetic refrigerator. The magnetic refrigeration system includes a tray 10, a first magnet assembly 20, a second magnet assembly 30, a first cold storage bed 40 and a second cold storage bed 50. The magnetic refrigeration system is provided with two air gaps and the two cold storage beds are respectively placed in the two air gaps. Under the condition of the same magnet dosage, the magnetic entropy change efficiency can be doubled, thereby improving the magnet utilization rate, making the mass of the magnet assembly smaller and the structure more compact, and can effectively reduce the overall machine cost of the magnetic refrigerator, which has a great beneficial effect on the industrialization and commercialization of the magnetic refrigerator.

[0038] Preferably, the first air gap 21 extends in the horizontal direction, and the second air gap 31 extends in the vertical direction. Such an arrangement enables the magnetic refrigeration system to excite and demagnetize the two cold storage beds from two directions, thereby increasing space utilization and making the structure of the magnetic refrigeration system more compact.

[0039] Preferably, the first air gap 21 extends along the radial direction of the tray.

[0040] In this embodiment, the first magnet assembly 20 includes a first magnet 22 and a second magnet 23 . The first magnet 22 and the second magnet 23 are arranged at an interval to form a first air gap 21 . The second magnet 23 is arranged above the first magnet 22 .

[0041] Preferably, there are a plurality of first magnets 22, and the plurality of first magnets 22 are sequentially connected and arranged along the radial direction of the tray. Preferably, there are two first magnets 22.

[0042] Preferably, there are a plurality of second magnets 23, and the plurality of second magnets 23 are sequentially connected and arranged along the radial direction of the tray. Preferably, there are two second magnets 23.

[0043] In this embodiment, the magnetic refrigeration system further includes: a first magnetic focusing plate 60, which is arranged on the end surface of the first magnet 22 close to the second magnet 23; and / or a second magnetic focusing plate 70, which is arranged on the end surface of the second magnet 23 close to the first magnet 22. Such an arrangement allows the magnetic lines of force to be concentrated in one area.

[0044] In this embodiment, the first magnet assembly 20 also includes a third magnet 24, which has a first end face and a second end face that are relatively arranged along the radial direction of the tray. The first end face is connected to the second magnet 23, and the second end face is relatively arranged to the second magnet assembly 30 to form a second air gap 31.

[0045] Preferably, there are a plurality of third magnets 24, and the plurality of third magnets 24 are sequentially connected and arranged along the vertical direction. Preferably, there are two third magnets 24.

[0046] In this embodiment, the third magnet 24 has a third end face and a fourth end face that are relatively arranged in the vertical direction; the first magnet assembly 20 also includes a fourth magnet 25, and the fourth magnet 25 is clamped between the first magnet 22 and the third magnet 24; wherein the fourth magnet 25 has a first connecting surface and a second connecting surface, the first connecting surface is connected to the first magnet 22, and the second connecting surface is connected to the third end face.

[0047] In this embodiment, the first magnet 22 has a fifth end face and a sixth end face that are relatively arranged in the vertical direction, and the fifth end face is arranged on the side of the sixth end face away from the second magnet 23; the third magnet 24 also has a third connecting surface, and one end of the third connecting surface connected to the first connecting surface is connected to the fifth end face; one end of the third connecting surface connected to the second connecting surface is connected to the second end face; wherein a first magnetic resistance plate 80 is arranged on the third connecting surface.

[0048] In a specific implementation, the cross-section of the third magnet 24 along the radial direction of the tray is a triangle; preferably, the cross-section of the third magnet 24 along the radial direction of the tray is a right-angled triangle, the first connecting surface and the second connecting surface are arranged perpendicularly, and the third connecting surface is inclined relative to the first connecting surface and the second connecting surface.

[0049] During specific implementation, one end of the first magnetic resistance plate 80 is connected to the third magnetic focusing plate 90 .

[0050] In this embodiment, the magnetic refrigeration system further includes: a third magnetic focusing plate 90, which is arranged on the second end surface; and / or a fourth magnetic focusing plate 100, which is arranged on the end surface of the second magnet assembly 30 opposite to the second end surface. Such an arrangement allows the magnetic lines of force to be concentrated in one area.

[0051] In a specific implementation, the second magnet assembly 30 is the fifth magnet; wherein the first magnet, the second magnet, the third magnet, the fourth magnet and the fifth magnet are all permanent magnets.

[0052] In this embodiment, the tray 10 includes a rotating shaft 11 , and the second magnet assembly 30 is connected to the rotating shaft 11 .

[0053] In this embodiment, the tray 10 further includes a rib 12 , and the first magnet 22 is connected to the rib 12 .

[0054] In a specific implementation, the rotating shaft 11 and the ribs 12 are both made of high magnetic permeability materials to play a role in magnetic conductivity.

[0055] In a specific implementation, the tray 10 includes a support ring, a rotating shaft 11 and a rib 12 , one end of the rib 12 is connected to the rotating shaft 11 , and the other end of the rib 12 is connected to the support ring.

[0056] In this embodiment, there are multiple first magnet assemblies 20; there are multiple second magnet assemblies 30, each of which is connected to the rotating shaft 11, and the multiple second magnet assemblies 30 are arranged around the circumference of the rotating shaft 11; the multiple first magnet assemblies 20 are arranged in a one-to-one correspondence with the multiple second magnet assemblies 30, and a second air gap 31 is formed between each first magnet assembly 20 and the corresponding second magnet assembly 30; there are multiple first cold storage beds 40, the multiple first cold storage beds 40 are arranged in a one-to-one correspondence with the multiple first magnet assemblies 20, and each first cold storage bed 40 is arranged in the first air gap 21 of the corresponding first magnet assembly 20; there are multiple second cold storage beds 50, the multiple second cold storage beds 50 are arranged in a one-to-one correspondence with the multiple second air gaps 31, and each second cold storage bed 50 is arranged in the corresponding second air gap 31.

[0057] In this embodiment, a second magnetic resistance plate 110 is disposed between two adjacent second magnet assemblies 30 .

[0058] In this embodiment, there are multiple ribs 12, and the multiple ribs 12 are arranged in a one-to-one correspondence with the multiple first magnet assemblies 20, and each first magnet assembly 20 is arranged on the corresponding rib 12; the magnetic refrigeration system also includes: multiple sub-magnetic blocks 120, each sub-magnetic block 120 is connected to the rotating shaft 11, and the multiple sub-magnetic blocks 120 are arranged in a one-to-one correspondence with the multiple ribs 12, and each sub-magnetic block 120 is connected to the corresponding rib 12.

[0059] In this embodiment, the magnetic refrigeration system further includes: a cold storage bed support 130 , and the first cold storage bed 40 and the second cold storage bed 50 are both fixedly disposed on the cold storage bed support 130 .

[0060] In one embodiment, the number of the first magnet assembly 20 , the second magnet assembly 30 , the first cold storage bed 40 , the second cold storage bed 50 , the ribs 12 and the magnetic sub-blocks 120 are all three.

[0061] In specific implementation, the first magnet assembly 20 is as follows Figure 2 As shown, it is composed of a plurality of first magnets, second magnets, third magnets, fourth magnets magnetized in the direction shown in the figure, a first magnetic plate 60, a second magnetic plate 70, a first magnetic resistance plate 80, and a third magnetic plate 90. The first magnet assembly 20 is assembled on the tray 10 and driven by the shaft 11 to rotate continuously.

[0062] In specific implementation, the second magnet assembly 30 is as follows Figure 3 and Figure 4 As shown, there are three second magnet assemblies 30, and the three second magnet assemblies 30 are circumferentially distributed with the rotating shaft as the center; the three second magnet assemblies 30 are each provided with an arc groove with the rotating shaft axis as the center on the side close to the rotating shaft, and the three second magnet assemblies 30 are surrounded by a circular hole to be sleeved on the rotating shaft 11, and are fastened to the rotating shaft 11, and are driven to rotate by the rotating shaft 11, and rotate synchronously with the first magnet assembly 20; the three second magnet assemblies 30 are arranged according to Figure 4 When magnetized in the direction shown, the magnetic lines of force converge toward the center, forming a magnetic flow path with magnetic convergence.

[0063] In specific implementation, the three second magnet assemblies 30 are separated by three second magnetic resistance plates 110 to prevent abnormal magnetic field line transmission between the three second magnet assemblies 30. A magnetic dividing block 120 is provided at the bottom of each second magnet assembly 30, so that the above-converged magnetic flow path can be evenly divided into three magnetic branches.

[0064] In specific implementation, the magnetic field of the magnetic refrigeration system has three parts, including an independent magnetic circuit section, a magnetic convergence section, and a magnetic diversion section. Figure 6 As shown, the three independent magnetic circuit segments are evenly distributed circumferentially with the rotating shaft as the central axis.

[0065] In specific implementation, the magnetic refrigeration system has three independent magnetic circuit sections, such as Figure 5Shown is a single complete, independent magnetic circuit segment. Figure 2 , Figure 3 and Figure 4 , the magnetic lines of force of the independent magnetic circuit segment start from the fourth magnet 25 of the first magnet assembly 20, flow out toward the first magnet 22 along the radial direction of the tray, and pass through the first magnet 22. Here, the magnetic lines of force are transformed to be vertically upward, passing through the first magnetic focusing plate 60 and the second magnetic focusing plate 70 through the first air gap 21, and then passing through the second magnet 23. The magnetic lines of force then reach the third magnet 24, where the magnetic lines of force switch to flow in the radial direction of the tray in a direction away from the first magnet 22, continue to flow forward through the third magnetic focusing plate 90, pass through the second air gap 31, and then reach the fourth magnetic focusing plate 100 on the second magnet assembly 30, and continue to pass through the second magnet assembly 30. The independent magnetic circuit segment is partially completed.

[0066] When implementing it, Figure 6 , Figure 7 and Figure 8 , the three second magnet assemblies 30 are also centered on the rotating shaft, evenly distributed circumferentially, and in contact with the rotating shaft. In the magnetic circuit cycle, as part of the magnetic circuit, the rotating shaft also plays a role in magnetic conductivity. After the magnetic lines of force of the three independent magnetic circuit segments pass through the second magnet assembly 30, due to its contact with the rotating shaft, the magnetic lines of force will converge at the center position and pass downward along the rotating shaft; in this way, a magnetic convergence section is formed. Only ribs for supporting the first magnet 22 are left on the working surface of the tray, and the rest of the part is hollowed out. The ribs can play a role in magnetic conductivity. When the magnetic lines of force are transmitted along the rotating shaft to the magnetic dividing block at the bottom of the second magnet assembly 30, under the action of the magnetic dividing block, the magnetic lines of force are redivided into three paths. These three magnetic lines of force are transmitted along the ribs on the tray, and finally pass through the first magnet 22 of the first magnet assembly 20, thus forming a magnetic diversion section. In summary, the magnetic circulation flow path of the entire cycle is completed.

[0067] In a specific implementation, the first magnet assembly 20 is in a U-shaped structure, and the concave opening of the U-shaped structure is arranged in a direction away from the second magnet assembly 30 .

[0068] During specific implementation, the cold storage bed can be arranged close to the center vertically or horizontally.

[0069] The magnetic refrigeration system of the present invention solves the following problems in the prior art: the permanent magnet assembly occupies a large space volume in the magnetic refrigeration system, but most of the current magnets have a small and small magnet air gap, resulting in a low magnet utilization rate; due to the low utilization rate of the current magnet assembly, magnetic refrigerators generally have large overall machine size and high cost, which is not conducive to industrialization and commercialization; due to the large size and mass of the magnet assembly, the method of rotating the magnet assembly will result in high power consumption and low efficiency.

[0070] The beneficial effects of the magnetic refrigeration system of the present invention are: improving the utilization rate of magnets, making the mass of the magnet assembly smaller and the structure more compact, and effectively reducing the overall cost of the magnetic refrigerator, which has a great beneficial effect on the industrialization and commercialization of the magnetic refrigerator.

[0071] The inventive point of the present invention is that the magnetic refrigeration system can excite and demagnetize the cold storage bed in the radial and axial regions, thereby improving the comprehensive utilization rate of the magnet assembly; the magnet assembly with multiple air gaps and compact structure can effectively reduce the volume of the magnet assembly, making the size of the entire machine more compact, which is more beneficial to the commercialization of the magnetic refrigerator.

[0072] The present invention also provides a magnetic refrigerator, comprising a magnetic refrigeration system, wherein the magnetic refrigeration system is the magnetic refrigeration system in the above embodiment.

[0073] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0074] The magnetic refrigeration system of the present invention relates to the field of magnetic refrigeration, mainly to a magnetic field generating device of a rotary magnetic refrigerator. The magnetic refrigeration system includes a tray 10, a first magnet assembly 20, a second magnet assembly 30, a first cold storage bed 40 and a second cold storage bed 50. The magnetic refrigeration system is provided with two air gaps and the two cold storage beds are respectively placed in the two air gaps. Under the condition of the same magnet dosage, the magnetic entropy change efficiency can be doubled, thereby improving the magnet utilization rate, making the mass of the magnet assembly smaller and the structure more compact, and can effectively reduce the overall machine cost of the magnetic refrigerator, which has a great beneficial effect on the industrialization and commercialization of the magnetic refrigerator.

[0075] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0076] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic refrigeration system, characterized in that: include: A tray (10), wherein the tray (10) is rotatably arranged; A first magnet assembly (20) is arranged on the tray (10) so that the tray (10) drives the first magnet assembly (20) to rotate; the first magnet assembly (20) has a first air gap (21); a second magnet assembly (30) disposed on the tray (10) so that the tray (10) drives the second magnet assembly (30) to rotate; the second magnet assembly (30) and the first magnet assembly (20) are spaced apart to form a second air gap (31); A first cold storage bed (40) is arranged in the first air gap (21) to excite and demagnetize the magnetic medium in the first cold storage bed (40) when the first magnet assembly (20) rotates relative to the first cold storage bed (40); A second cold storage bed (50) is arranged in the second air gap (31) to excite and demagnetize the magnetic medium in the second cold storage bed (50) when the first magnet assembly (20) and the second magnet assembly (30) rotate relative to the second cold storage bed (50); The first air gap (21) extends in a horizontal direction, and the second air gap (31) extends in a vertical direction; The first magnet assembly (20) comprises a first magnet (22) and a second magnet (23), wherein the first magnet (22) and the second magnet (23) are arranged at an interval to form the first air gap (21), and the second magnet (23) is arranged above the first magnet (22).

2. The magnetic refrigeration system according to claim 1, characterized in that: The magnetic refrigeration system also includes: a first magnetic focusing plate (60), wherein the first magnetic focusing plate (60) is arranged on an end surface of the first magnet (22) close to the second magnet (23); and / or A second magnetic field focusing plate (70), wherein the second magnetic field focusing plate (70) is arranged on the end surface of the second magnet (23) close to the first magnet (22).

3. The magnetic refrigeration system according to claim 2, characterized in that: The first magnet assembly (20) further includes a third magnet (24), wherein the third magnet (24) has a first end face and a second end face that are arranged opposite to each other along the radial direction of the tray (10), wherein the first end face is connected to the second magnet (23), and the second end face is arranged opposite to the second magnet assembly (30) to form the second air gap (31).

4. The magnetic refrigeration system according to claim 3, characterized in that: The third magnet (24) has a third end face and a fourth end face that are arranged opposite to each other in the vertical direction; the first magnet assembly (20) also includes a fourth magnet (25), and the fourth magnet (25) is sandwiched between the first magnet (22) and the third magnet (24); wherein the fourth magnet (25) has a first connecting surface and a second connecting surface, the first connecting surface is connected to the first magnet (22), and the second connecting surface is connected to the third end face.

5. The magnetic refrigeration system according to claim 4, characterized in that: The first magnet (22) has a fifth end face and a sixth end face arranged opposite to each other in the vertical direction, the fifth end face being arranged on a side of the sixth end face away from the second magnet (23); the third magnet (24) further has a third connecting face, one end of the third connecting face connected to the first connecting face is connected to the fifth end face; and one end of the third connecting face connected to the second connecting face is connected to the second end face; Wherein, a first magnetic resistance plate (80) is arranged on the third connecting surface.

6. The magnetic refrigeration system according to claim 3, characterized in that: The magnetic refrigeration system also includes: a third magnetic field focusing plate (90), wherein the third magnetic field focusing plate (90) is arranged on the second end surface; and / or, A fourth magnetic concentrating plate (100), wherein the fourth magnetic concentrating plate (100) is arranged on an end surface of the second magnet assembly (30) that is arranged opposite to the second end surface.

7. The magnetic refrigeration system according to any one of claims 1 to 6, characterized in that: The tray (10) comprises a rotating shaft (11), and the second magnet assembly (30) is connected to the rotating shaft (11).

8. The magnetic refrigeration system according to claim 7, characterized in that: The tray (10) further comprises a rib (12), and the first magnet (22) is connected to the rib (12).

9. The magnetic refrigeration system according to claim 8, characterized in that: There are a plurality of the first magnet assemblies (20); there are a plurality of the second magnet assemblies (30), each of the second magnet assemblies (30) is connected to the rotating shaft (11), and the plurality of the second magnet assemblies (30) are arranged around the circumference of the rotating shaft (11); the plurality of the first magnet assemblies (20) and the plurality of the second magnet assemblies (30) are arranged in a one-to-one correspondence, and a second air gap (31) is formed between each of the first magnet assemblies (20) and the corresponding second magnet assembly (30); There are a plurality of the first cold storage beds (40), the plurality of the first cold storage beds (40) are arranged in one-to-one correspondence with the plurality of the first magnet assemblies (20), and each of the first cold storage beds (40) is arranged in the first air gap (21) of the corresponding first magnet assembly (20); There are a plurality of the second cold storage beds (50), and the plurality of the second cold storage beds (50) are arranged in one-to-one correspondence with the plurality of the second air gaps (31), and each of the second cold storage beds (50) is arranged in a corresponding second air gap (31).

10. The magnetic refrigeration system according to claim 9, characterized in that: A second magnetic resistance plate (110) is disposed between two adjacent second magnet assemblies (30).

11. The magnetic refrigeration system according to claim 10, characterized in that: There are a plurality of ribs (12), and the plurality of ribs (12) are arranged in one-to-one correspondence with the plurality of first magnet assemblies (20), and each first magnet assembly (20) is arranged on a corresponding rib (12); the magnetic refrigeration system further comprises: A plurality of magnetic sub-blocks (120), each of which is connected to the rotating shaft (11); the plurality of magnetic sub-blocks (120) are arranged in one-to-one correspondence with the plurality of ribs (12); and each of which is connected to a corresponding rib (12).

12. The magnetic refrigeration system according to claim 1, characterized in that: The magnetic refrigeration system also includes: A cold storage bed support (130), wherein the first cold storage bed (40) and the second cold storage bed (50) are both fixedly arranged on the cold storage bed support (130).

13. A magnetic refrigerator, comprising a magnetic refrigeration system, characterized in that: The magnetic refrigeration system is the magnetic refrigeration system according to any one of claims 1 to 12.

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