CN112129006A

CN112129006A - Magnetic heat regenerator and magnetic refrigeration device

Info

Publication number: CN112129006A
Application number: CN202010960465.7A
Authority: CN
Inventors: 李大全; 汪魁; 王振雨; 杨蓉; 罗胜; 张谱辉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-12-25

Abstract

The application provides a magnetic heat regenerator and a magnetic refrigeration device. The magnetic heat regenerator comprises a shell (1) and at least two containing structures, wherein the containing structures are provided with containing spaces for containing magnetic working media, the at least two containing structures are sequentially arranged in the shell (1) along the flowing direction of heat exchange fluid, the containing structures are mutually independent and can be opened or closed independently, each containing structure is provided with a channel wall (2), and the channel walls (2) can be used for the heat exchange fluid to pass through and can prevent the magnetic working media from passing through. According to the magnetic regenerator, the problem that materials with different Curie temperatures cannot be distinguished due to the fact that magnetic media with different Curie temperatures are filled in, taken out or mixed together in the working process can be effectively avoided.

Description

Magnetic heat regenerator and magnetic refrigeration device

Technical Field

The application relates to the technical field of magnetic refrigeration, in particular to a magnetic heat regenerator and a magnetic refrigeration device.

Background

With the increasingly obvious disadvantages of the traditional vapor compression refrigeration technology in terms of environmental unfriendliness and heat exchange efficiency, the research and development of novel refrigeration technology (non-air compression refrigeration) is pressing. The magnetic refrigeration technology is one of the novel refrigeration technologies with the best development prospect, particularly has outstanding advantages in the aspects of environmental friendliness and high efficiency, and compared with the traditional vapor compression refrigeration, the refrigeration efficiency of the magnetic refrigeration can reach 40-50% of Carnot cycle efficiency and is about 30% higher than that of the traditional compression refrigeration mode; the external magnetic refrigeration mode adopts magnetic materials to carry out solid-liquid heat exchange, and no gas harmful to the environment is generated; and the magnetic refrigeration device has low operating frequency and generates small noise. With the above advantages, the magnetic refrigeration technology has become a new refrigeration technology which has received the highest attention in recent years.

A magnetic refrigeration apparatus is a device for refrigerating using physical properties of a magnetocaloric material, and the technical basis of the apparatus is the magnetocaloric effect of the magnetocaloric material, namely: when a changing magnetic field is applied to the magnetocaloric material, the temperature of the magnetocaloric material is increased or decreased, the magnetic entropy of the material is decreased when the magnetic field strength is increased, heat is released, the temperature is increased, and the magnetic entropy of the material is increased when the magnetic field strength is decreased, heat is absorbed, and the temperature is decreased. A magnetic refrigeration device is therefore generally required to have: the device comprises a variable magnetic field, a magnetic heat regenerator (used for placing magnetocaloric materials), a heat transfer fluid, a cold-end heat exchanger, a hot-end heat radiator and a matched power component.

In order to generate a large temperature span of the regenerator, a plurality of magnetocaloric materials with different curie temperatures need to be filled in the regenerator to form a regenerator structure with multiple layers of magnetocaloric materials (referred to as a multilayer regenerator for short). In the conventional magnetic refrigeration device, the layered structure of the magnetocaloric materials has a problem of poor practical applicability, and particularly, for non-integrated magnetocaloric materials (such as spheres, flakes, particles, and the like), when the magnetocaloric materials in each layer are filled or taken out, the magnetocaloric materials with different curie temperatures are mixed together, and the different materials cannot be distinguished.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a magnetism heat regenerator and magnetism refrigerating plant, can effectively avoid the magnetic medium of different curie temperatures to fill in, take out or the course of the work mixes together, leads to the problem that the material of different curie temperatures can't distinguish.

In order to solve the above problem, the present application provides a magnetic regenerator, including a housing and at least two receiving structures, the receiving structure has a receiving space for receiving a magnetic medium, the at least two receiving structures are sequentially disposed in the housing along a flowing direction of a heat exchange fluid, each receiving structure is independent of each other and can be opened or closed independently, the receiving structure has a channel wall, the channel wall can be passed by the heat exchange fluid and can prevent the magnetic medium from passing through.

Preferably, the magnetic medium in each accommodating structure has a single curie temperature, the curie temperatures of the magnetic medium in different accommodating structures are different, and the curie temperatures of the magnetic medium in different accommodating structures are increased or decreased gradually along the flowing direction of the fluid.

Preferably, a fluid inlet channel and a fluid outlet channel are further arranged in the shell, and the fluid inlet channel and the fluid outlet channel are matched with the containing structure to form a heat exchange fluid channel.

Preferably, the accommodating structure comprises an accommodating box, the shell is provided with a cavity, the accommodating box is arranged in the cavity, and the magnetic working medium is filled in the accommodating box.

Preferably, the accommodating box comprises a box body and a box cover, wherein two opposite sides of the box body form channel walls, and the box cover capable of opening or closing the box body is arranged on at least one side wall of the box body between the two channel walls; and/or a cover body is covered at the opening of the cavity.

Preferably, the channel walls are grid-like or mesh-like.

Preferably, the box body is of an integrally formed structure; and/or the box body is processed and molded by plastic.

Preferably, the accommodation box includes a box body, channel walls detachably mounted on two opposite sides of the box body, and a box cover provided on at least one side wall of the box body between the two channel walls to open or close the box body.

Preferably, the channel wall comprises a first filter screen and a support frame, the support frame is fixedly connected to the box body, and the first filter screen is installed between the support frame and the box body.

Preferably, a second filter screen is arranged between the adjacent accommodating boxes, the adjacent accommodating boxes can be isolated by the second filter screen, and the second filter screen can be used for heat exchange fluid to pass through and can prevent magnetic working media from passing through.

Preferably, be provided with a plurality of draw-in grooves in the cavity, the second filter screen sets up in the draw-in groove to separate the cavity for a plurality of installation cavity, install at least one in every installation cavity and hold the box.

Preferably, the casing has the cavity, is provided with at least one second filter screen in the cavity, and at least one second filter screen separates the cavity into two at least holding chambers, and the opening part in each holding chamber is provided with the encapsulation lid respectively, and the encapsulation lid setting is between two adjacent second filter screens, and the encapsulation lid in different holding chambers is spaced apart through the second filter screen.

According to another aspect of the present application, there is provided a magnetic refrigeration apparatus comprising a magnetic regenerator, the magnetic regenerator being as described above.

The application provides a magnetic heat regenerator, including casing and two at least containing structure, containing structure has the accommodation space who holds magnetic medium, and two at least containing structure set gradually in the casing along heat transfer fluid's flow direction, and each containing structure is independent each other to can open alone or close, containing structure has the passageway wall, and the passageway wall can supply heat transfer fluid to pass through, and can prevent magnetic medium and pass through. Mutual independence between this magnetism regenerator's the containing structure, and can open alone or close, consequently, carry out the income or take out of magnetic medium, or be in magnetism regenerator working process, make the magnetic medium in each containing structure all be in independent operation state, consequently can't mix together, when carrying out the income or taking out of magnetic medium, can also open alone and need fill in or take out the containing structure of magnetic medium, and make other containing structure be in the closed condition, make this containing structure's operation can not receive other containing structure's influence, effectively improved the income of magnetic medium, take out or change efficiency, the problem that the magnetic medium that can effectively avoid different curie temperatures mixes together.

Drawings

FIG. 1 is a schematic diagram of the heat exchange fluid flow of a magnetic regenerator in accordance with an embodiment of the present application;

FIG. 2 is a perspective view of a magnetic regenerator in accordance with an embodiment of the present application;

FIG. 3 is a perspective view of a containment box of a magnetic regenerator in accordance with one embodiment of the present application;

FIG. 4 is an exploded view of a magnetic regenerator in accordance with an embodiment of the present application;

FIG. 5 is a schematic view of a structure of a casing and a cover of a magnetic regenerator according to an embodiment of the present application;

FIG. 6 is a schematic structural view of a housing of a magnetic regenerator in accordance with an embodiment of the present application;

FIG. 7 is a perspective view of a container box of a magnetic regenerator in accordance with an embodiment of the present application;

FIG. 8 is an exploded view of the containment box of the magnetic regenerator in accordance with one embodiment of the present application;

fig. 9 is a schematic structural diagram of a magnetic regenerator in accordance with an embodiment of the present application.

The reference numerals are represented as:

1. a housing; 2. a channel wall; 3. a cover body; 4. a box body; 5. a box cover; 6. a first filter screen; 7. a support frame; 8. a second filter screen; 9. a card slot; 10. and (7) packaging the cover.

Detailed Description

With combined reference to fig. 1 to 9, according to an embodiment of the present application, a magnetic regenerator includes a housing 1 and at least two receiving structures, the receiving structures have receiving spaces for receiving magnetic media, the at least two receiving structures are sequentially disposed in the housing 1 along a flow direction of a heat exchange fluid, each receiving structure is independent from each other and can be opened or closed independently, the receiving structures have channel walls 2, the channel walls 2 can be passed by the heat exchange fluid and can prevent the magnetic media from passing through.

Mutual independence between this magnetism regenerator's the containing structure, and can open alone or close, consequently, carry out the income or take out of magnetic medium, or in magnetism regenerator working process, make the magnetic medium in each containing structure all be in independent operation state, consequently can't mix together, when carrying out the income or taking out of magnetic medium, can also open alone and need fill in or take out the containing structure of magnetic medium, and make other containing structure be in the closed condition, make this containing structure's operation can not receive other containing structure's influence, also can not exert an influence to other containing structure, effectively improved filling of magnetic medium, take out or change efficiency, the problem that the magnetic medium that can effectively avoid different curie temperatures mixes together.

The shell 1 is also internally provided with a fluid inlet channel and a fluid outlet channel, and the fluid inlet channel and the fluid outlet channel are matched with the containing structure to form a heat exchange fluid channel.

The magnetic heat regenerator of the application is filled with magnetic working media in the containing structure, and the containing structure is arranged in the shell 1, can be matched with a fluid channel in the shell 1 to form a heat exchange fluid channel, and can be matched with other heat exchange structures to realize the circular flow of heat exchange fluid.

When the magnetic regenerator is in a changing magnetic field, the magnetic working medium in the magnetic regenerator can generate a magnetocaloric effect so as to generate cold and heat, meanwhile, the heat exchange fluid flows into the magnetic regenerator from a fluid inlet channel of the regenerator to exchange heat with the magnetic working medium in the magnetic regenerator, and then flows out of the magnetic regenerator through a fluid outlet channel so as to bring the cold generated by the heat regenerator to a cold end or bring the heat generated by the heat regenerator to a hot end, thereby realizing the refrigeration or heating function.

Due to the material characteristics of the magnetic working medium, in order to form a large temperature span for the magnetic refrigerator, a plurality of magnetic working media with different curie temperatures need to be filled in the heat regenerator to form a step-by-step heating (or step-by-step cooling) effect.

In an embodiment of this application, the magnetic medium in each containing structure has single Curie temperature, and the Curie temperature of the magnetic medium in the different containing structures is different, and along the fluidic flow direction, the Curie temperature of the magnetic medium in the different containing structures increases progressively or diminishes progressively to can conveniently realize heating step by step or the refrigerated effect step by step, improve the refrigeration of magnetism heat regenerator or the ability of heating.

Because mutual independence between the containment structure of this application, and set gradually along fluidic flow direction, consequently can realize the layering of the magnetic medium of different curie temperatures in magnetism regenerator, can utilize the independence of containment structure to realize taking out alone or packing into of the magnetic medium of each curie temperature simultaneously, the problem of the magnetic medium emergence mixing of different curie temperatures has been avoided.

In one embodiment, the containing structure comprises a containing box, the housing 1 has a cavity, the containing box is arranged in the cavity, and the magnetic medium is filled in the containing box. The accommodating boxes are independent box body structures and can be used for accommodating magnetic working media independently, the structures formed after the accommodating boxes are combined together are matched with the cavity structures of the shell 1, and good installation matching relation can be formed between the accommodating boxes and the cavity of the shell 1.

In this embodiment, because each holds the box mutually independent, the magnetic medium of the single curie temperature of splendid attire in the single box that holds, and every holds the box and all can put into the cavity of casing 1 alone, perhaps takes out from the cavity of casing 1, can not influence each other, consequently when carrying out the operation of filling in or taking out of magnetic medium, can take out all holding box simultaneously, then operate each holds the box, realize each holding filling in or taking out of magnetic medium in the box and operate. The magnetic medium is filled into the accommodating box or taken out of the accommodating box, and the accommodating boxes are independent from one another and can be operated independently, so that the accommodating boxes can be operated simultaneously through different operation main bodies or the same operation main body, synchronous operation of the accommodating boxes is realized, filling or taking efficiency of the magnetic medium is improved, and operability is stronger.

After the magnetic working medium is filled or taken out, the accommodating box can be placed into the cavity independently or simultaneously, and the assembling efficiency of the accommodating box is improved.

In addition, when carrying out the change operation of magnetic medium, only need to the magnetic medium place that needs to be changed hold the box operate can, can not cause any influence to other magnetic medium that hold in the box, if need change all magnetic medium that hold in the box simultaneously, also can take out each box that holds from the cavity simultaneously, carry out independent operation separately, need not to take out the change with the magnetic medium in the magnetism heat regenerator one by one, consequently can increase substantially the change efficiency of the magnetic medium of non-integral type (like globular, fragmental, graininess etc.), maneuverability is stronger.

The opening part lid of cavity is equipped with lid 3, can hold the box and pack into the cavity back, and the lid is established at the opening part of cavity, fixes a position holding the box. The lid 3 can adopt modes such as joint to install at the opening part of cavity, need not the screw and fix to conveniently carry out installing and removing of lid 3, and then the operation is perhaps dismantled to the installation that holds the box to the convenience. The lid 3 also can set up on the terminal surface of the empty gun opening side of casing 1 to adopt modes such as bolted connection to carry out fixed connection between with casing 1, realize the location to holding the box.

In the embodiment, the magnetic working media with different Curie temperatures are divided into parts through the independent accommodating box, so that the problem that the magnetic working media with different Curie temperatures are mixed together when the magnetic working media are filled or replaced can be avoided.

Because the magnetic medium of different curie temperatures has realized the part through holding the box and has become, consequently can make the magnetic medium of different curie temperatures install or dismantle as a whole, and the material that does not regard as scattered installs or dismantles, and its operating efficiency is higher than the operating efficiency of the magnetic medium of not part far away.

In the actual installation and assembly process of the magnetic heat regenerator, the filling of the magnetic working medium and the installation of the accommodating box can be carried out in the following manner.

Firstly, filling the magnetic working medium into each accommodating box, sealing the accommodating boxes after the accommodating boxes are filled, and then installing the accommodating boxes filled with the magnetic working medium and sealed into the cavity of the shell 1. After all the accommodating boxes are installed in a preset sequence, the sealing element on the shell 1 and the cover body 3 matched with the shell 1 are installed on the shell 1, so that a sealing effect is formed on the cavity of the shell 1, and the installation process of the magnetic regenerator is completed.

When the magnetic working medium needs to be replaced, the operation can be carried out according to the reverse order of the steps, the magnetic working medium is taken out of the containing box, and then the magnetic working medium is loaded into the containing box and the containing box is installed according to the steps.

In one embodiment, the accommodation box comprises a box body 4 and a box cover 5, wherein two opposite sides of the box body 4 form channel walls 2, and the box cover 5 capable of opening or closing the box body 4 is arranged on at least one side wall of the box body 4 between the two channel walls 2. The channel walls 2 formed by the two opposite sides of the box body 4 can enable the box body 4 to integrally form a transparent structure, and the transparent structure can enable heat exchange fluid to pass through and prevent magnetic media from passing through, so that the magnetic media can be stably kept in the containing box of the box body and cannot enter other containing boxes, the mixing of the magnetic media is avoided, and meanwhile, the flowing performance of the heat exchange fluid is ensured. Lid 5 can be opened or close, can conveniently operate the magnetic medium that is located in holding the box, fills magnetic medium and holds the box or take out from holding the box, later can cover lid 5 on box body 4, realizes the sealed to box body 4.

The channel walls 2 are in the form of a grid or mesh.

The box body 4 is of an integrally formed structure; and/or the box body 4 is processed and molded by plastic.

In this embodiment, hold the box and can adopt plastics processing, then adopt 3D to print, make and hold the whole better materials of heat transfer performance such as stainless steel that do not adopt of box, can provide multiple magnetic medium layered structure that has better thermal-insulated effect, thereby the better problem of heat conductivity between the adjacent magnetic medium that adopts the stainless steel filter screen to lead to among the prior art has been avoided, the heat transfer between the magnetic medium layer in the magnetic regenerator has been avoided, the formation of the difference in temperature between the magnetic medium layer has been guaranteed.

In one embodiment, the accommodation box comprises a box body 4, channel walls 2 and a box cover 5, wherein the channel walls 2 are detachably arranged on two opposite sides of the box body 4, and the box cover 5 capable of opening or closing the box body 4 is arranged on at least one side wall of the box body 4 between the two channel walls 2. In this embodiment, the accommodation box is a split structure, and a plurality of components are combined together to form a closed accommodation box. The split type structure of holding the box can be according to the cutting of the structure selection part that holds the box for the processing of single part is easier, reduces the processing cost that holds the box, improves the machining efficiency that holds the box, is convenient for hold the change or the maintenance of the different spare parts of box simultaneously.

The holding box in the embodiment separates the channel wall 2 from the box body 4, so that a split structure is formed between the channel wall 2 and the box body 4, the processing of the box body 4 can be facilitated, the processing difficulty of the channel wall 2 can be reduced, the processing procedures are reduced, and the realization of the structural performance of the channel wall 2 is facilitated.

In this embodiment, the channel wall 2 includes a first filter 6 and a support frame 7, the support frame 7 is fixedly connected to the box body 4, and the first filter 6 is installed between the support frame 7 and the box body 4.

First filter screen 6, support frame 7 and box body 4 can be together fixed through the mode of screw connection or bonding, and wherein support frame 7's effect lies in, when first filter screen 6 adopts softer material, can play the effect of fixed stay.

When the material of first filter screen 6 itself is harder, can form the support, can save the support frame this moment, directly fix first filter screen 6 on box body 4.

The embodiment can increase the area of the inlet channel of the heat exchange fluid flowing into the containing box, improve the contact effect of the heat exchange fluid and the magnetic working medium in the containing box, and improve the heat exchange efficiency of the magnetic heat regenerator.

In one embodiment, a second filter screen 8 is arranged between the adjacent accommodating boxes, the second filter screen 8 can separate the adjacent accommodating boxes, the second filter screen 8 can be used for heat exchange fluid to pass through, and can prevent magnetic working media from passing through. In this embodiment, increased solitary second filter screen 8 between adjacent holding box, consequently can play the effect of safety guarantee, can prevent the mixture between magnetic medium layer and the layer when holding the channel wall damage of box both sides, guarantee that magnetic medium keeps apart each other, can not mix together, improve the stability and the reliability of magnetism regenerator during operation.

Be provided with a plurality of draw-in grooves 9 in the cavity, second filter screen 8 sets up in draw-in groove 9 to separate the cavity for a plurality of installation cavity, install at least one in every installation cavity and hold the box. Through set up draw-in groove 9 on the inner wall of cavity, can conveniently realize the installation location of second filter screen 8 in the cavity, easily operation, easy realization.

When the magnetic regenerator is assembled, the second filter screen 8 can be firstly installed in the corresponding clamping groove 9, then the accommodating box filled with the magnetic working medium is installed at the corresponding position of the shell 1, and then the sealing element and the cover body 3 are installed at the corresponding position, so that the assembly of the magnetic regenerator is completed.

In one embodiment, the housing 1 has a cavity, at least one second filter 8 is disposed in the cavity, the at least one second filter 8 divides the cavity into at least two accommodating cavities, an encapsulating cover 10 is disposed at an opening of each accommodating cavity, the encapsulating cover 10 is disposed between two adjacent second filters 8, and the encapsulating covers 10 of different accommodating cavities are spaced apart by the second filters 8.

In this embodiment, the second filter 8 is used as the channel wall 2, which not only has the function of allowing the heat exchange fluid to pass, but also can prevent the magnetic media from passing through, and thus prevents the magnetic media from being mixed. In this embodiment, because every holds the chamber mutually independent, and the encapsulation lid 10 of opening part is mutually independent too, can open alone or close, can not take place the influence each other, consequently when carrying out the operation of magnetic medium, can avoid influence each other, effectively avoids taking place the problem that the magnetic medium mixes. Simultaneously, at the in-process of magnetism regenerator work, because each encapsulation lid 10 mutual independence, and kept apart by second filter screen 8, the top of every layer of magnetic medium all sets up an solitary encapsulation lid 10 to can realize the isolation between the magnetic medium of different curie temperatures, avoid the mixture of the magnetic medium of different curie temperatures.

The sealed cooperation is realized between the capping face of encapsulation lid 10 in this embodiment and the support wall in the casing 1, the both sides of encapsulation lid 10 are sealed and are kept apart through second filter screen 8, form a plurality of independent encapsulation lids 10, rather than as prior art is general, cover as an overall structure encapsulation lid 10 and press on all openings that hold the chamber and second filter screen 8, consequently can not form the clearance of overflowing between the capping face of encapsulation lid 10 and second filter screen 8 under heat transfer fluid's pressure effect, can effectively avoid magnetic medium to flow into another from the clearance and hold the intracavity and cause the problem that magnetic medium mixes.

According to an embodiment of the application, the magnetic refrigeration device comprises a magnetic regenerator, which is the magnetic regenerator described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A magnetic regenerator, characterized by comprising a housing (1) and at least two containing structures, the containing structures having containing spaces for containing magnetic media, the at least two containing structures being arranged in sequence in the housing (1) along the flow direction of a heat exchange fluid, the containing structures being independent of each other and being capable of being opened or closed individually, the containing structures having channel walls (2), the channel walls (2) being capable of passing the heat exchange fluid and of preventing the magnetic media from passing.

2. A magnetic regenerator according to claim 1 wherein the magnetic fluid in each containment structure has a single curie temperature, the curie temperatures of the magnetic fluid in different containment structures being different, the curie temperatures of the magnetic fluid in different containment structures increasing or decreasing in the direction of fluid flow.

3. A magnetic regenerator according to claim 1, wherein a fluid inlet channel and a fluid outlet channel are further provided in the housing (1), the fluid inlet channel and the fluid outlet channel cooperating with the receiving structure to form a heat exchange fluid channel.

4. A magnetic regenerator as claimed in any of claims 1 to 3, wherein the containment structure comprises a containment box, the housing (1) having a cavity, the containment box being disposed within the cavity, the magnetic medium being filled within the containment box.

5. A magnetic regenerator according to claim 4, characterized in that the containment box comprises a box body (4) and a box cover (5), two opposite sides of the box body (4) forming the channel walls (2), at least one side wall of the box body (4) between two of the channel walls (2) being provided with a box cover (5) capable of opening or closing the box body (4); and/or a cover body (3) is covered at the opening of the cavity.

6. A magnetic regenerator as claimed in claim 5, wherein the channel wall (2) is grid-like or mesh-like.

7. A magnetic regenerator as claimed in claim 5, wherein the box (4) is of one-piece construction; and/or the box body (4) is processed and molded by plastic.

8. A magnetic regenerator according to claim 4, characterized in that the containment box comprises a box body (4), channel walls (2) and a box cover (5), the channel walls (2) being detachably mounted on two opposite sides of the box body (4), the box cover (5) capable of opening or closing the box body (4) being provided on at least one side wall of the box body (4) between the two channel walls (2).

9. A magnetic regenerator as claimed in claim 8, wherein the channel wall (2) comprises a first filter (6) and a support frame (7), the support frame (7) being fixedly connected to the box (4), the first filter (6) being mounted between the support frame (7) and the box (4).

10. A magnetic regenerator as claimed in any of claims 5 to 9, wherein a second filter (8) is provided between adjacent containment boxes, the second filter (8) being capable of separating adjacent containment boxes, the second filter (8) being capable of passing a heat exchange fluid and of blocking the passage of a magnetic medium.

11. A magnetic regenerator according to claim 10, wherein a plurality of slots (9) are provided in the cavity, and the second filter (8) is provided in the slots (9) and divides the cavity into a plurality of mounting cavities, at least one of the containment boxes being mounted in each of the mounting cavities.

12. A magnetic heat regenerator according to any of claims 1 to 3, wherein the housing (1) has a cavity, at least one second filter (8) is arranged in the cavity, the at least one second filter (8) divides the cavity into at least two accommodating cavities, an encapsulating cover (10) is arranged at the opening of each accommodating cavity, the encapsulating covers (10) are arranged between two adjacent second filters (8), and the encapsulating covers (10) of different accommodating cavities are spaced apart by the second filters (8).

13. A magnetic refrigeration apparatus comprising a magnetic regenerator, wherein the magnetic regenerator is as claimed in any one of claims 1 to 12.