CN212339679U - Magnetic refrigerator - Google Patents

Abstract

The utility model provides a magnetic refrigerator, which comprises a heat exchange module, a magnetic heating module and a valve group module, wherein the heat exchange module comprises a cold end heat exchanger and a hot end heat exchanger; the magnetocaloric module comprises a permanent magnet assembly and a cold storage bed, and the cold storage bed is provided with magnetocaloric materials; the valve group module comprises a cold end valve, a hot end valve and a cam, wherein two ends of the cold end valve are respectively communicated with the cold accumulation bed and the cold end heat exchanger, and two ends of the hot end valve are respectively communicated with the cold accumulation bed and the hot end heat exchanger; the cold end valve and the hot end valve are matched with the cam so as to control the cold end valve and the hot end valve to be opened and closed alternately through the cam; wherein, the hot junction valve is closed under the cold junction valve opens the condition, and the hot junction valve is opened under the cold junction valve closes the condition. This scheme adopts the modularized design with the magnetic refrigerator, can simplify the structure, and the assembly of being convenient for adopts cam drive cold junction valve and hot junction valve to open and close in turn, can avoid the solenoid valve that use cost is high. Therefore, the scheme can simplify the structure and reduce the manufacturing cost.

Description

Magnetic refrigerator

Technical Field

The utility model relates to a magnetic refrigeration technical field particularly, relates to a magnetic refrigerator.

Background

Magnetic refrigeration utilizes the magnetocaloric effect of magnetic refrigeration materials: when entering the magnetic field, the magnetocaloric material increases in temperature and releases heat to the outside, and when exiting the magnetic field, the magnetocaloric material decreases in temperature and absorbs heat from the outside. The air compressor has the advantages of energy conservation, environmental protection and low noise, and has the potential of replacing a vapor compression refrigeration technology.

However, with the current research progress, the magnetic refrigeration technology is applied to products and still has to solve the technical problems. The main problems of the current stage magnetic refrigerators are: the structure is complex, the volume is large and the cost is high. Therefore, it is difficult to commercially popularize and apply the method.

SUMMERY OF THE UTILITY MODEL

The utility model provides a magnetic refrigerator to simplify magnetic refrigerator's structure, reduce manufacturing cost.

In order to achieve the above object, the present invention provides a magnetic refrigerator, including: the heat exchange module comprises a cold end heat exchanger and a hot end heat exchanger; a magnetocaloric module comprising a permanent magnet assembly and a cold storage bed having a magnetocaloric material; the valve bank module comprises a cold end valve, a hot end valve and a cam, wherein two ends of the cold end valve are respectively communicated with the cold accumulation bed and the cold end heat exchanger, and two ends of the hot end valve are respectively communicated with the cold accumulation bed and the hot end heat exchanger; the cold end valve and the hot end valve are matched with the cam, so that the cold end valve and the hot end valve are controlled to be opened and closed alternately through the cam; wherein the hot end valve is closed when the cold end valve is opened, and the hot end valve is opened when the cold end valve is closed.

Further, the cold end valve comprises a valve seat and a valve core assembly, the valve seat is provided with a channel, and two ends of the channel are respectively communicated with the cold storage bed and the cold end heat exchanger; the valve core assembly is arranged on the valve seat in a reciprocating manner so as to open or close the channel; the cam is rotatably arranged and is in driving fit with the valve core assembly.

Further, the valve core assembly comprises a valve rod, an elastic piece and a roller, wherein the valve rod is arranged on the valve seat in a reciprocating manner to open or close the channel; the two ends of the elastic piece are respectively abutted to the valve rod and the valve seat, the roller is arranged at the end part of the valve rod, and the cam is abutted to the roller.

Furthermore, the cold accumulation bed, the cold end valve and the hot end valve are all 2N, the 2N cold accumulation beds are arranged around the permanent magnet assembly, each cold accumulation bed corresponds to one cold end valve and one hot end valve, and N is a positive integer.

Furthermore, the cold end valve and the hot end valve are both mechanical valves, and 2N mechanical valves are formed by N cold end valves and N hot end valves; the number of the cams is two, the rotating axes of the two cams are coaxially arranged, and each cam is matched with the N mechanical valves.

Further, N is an even number, the outer peripheral surface of the cam comprises N/2 first arc surfaces and N/2 second arc surfaces, the radius of the first arc surfaces is not equal to that of the second arc surfaces, and the N/2 first arc surfaces and the N/2 second arc surfaces are alternately arranged in the circumferential direction of the cam; every first arc surface and one mechanical valve butt, every second arc surface and one mechanical valve butt, wherein, with first arc surface butt the mechanical valve is in the open mode, with second arc surface butt the mechanical valve is in the closed mode.

Furthermore, the cam is rotatably arranged, the peripheral surface of the cam comprises a first arc surface and a second arc surface, the radius of the first arc surface is not equal to that of the second arc surface, the first arc surface can be abutted against or separated from the cold end valve, and the second arc surface can be abutted against or separated from the hot end valve; under the condition that the first arc surface is abutted to the cold end valve, the second arc surface is abutted to the hot end valve; and under the condition that the second arc surface is abutted to the cold end valve, the first arc surface is abutted to the hot end valve.

Further, the magnetic refrigerator further includes: and the rotating shaft penetrates through the permanent magnet assembly and the cam so as to drive the permanent magnet assembly and the cam to synchronously rotate.

Further, the heat exchange module, the magnetocaloric module and the valve bank module are arranged along the rotation axis of the permanent magnet assembly, and the arrangement sequence of the heat exchange module, the magnetocaloric module and the valve bank module is adjustable.

Further, one of the cold-side heat exchanger and the hot-side heat exchanger is used for cooling, the other of the cold-side heat exchanger and the hot-side heat exchanger is used for heating, and the heat exchange module further comprises: the shell is provided with a first air outlet and a second air outlet, and the cold end heat exchanger and the hot end heat exchanger are both positioned in the shell; the first fan is arranged in the shell and is positioned between the first air outlet and the cold end heat exchanger; and the second fan is arranged in the shell and is positioned between the second air outlet and the hot end heat exchanger.

The technical scheme of the utility model is applied, a magnetic refrigerator is provided, which comprises a heat exchange module, a magnetic heat module and a valve group module, wherein the heat exchange module comprises a cold end heat exchanger and a hot end heat exchanger; the magnetocaloric module comprises a permanent magnet assembly and a cold storage bed, and the cold storage bed is provided with magnetocaloric materials; the valve group module comprises a cold end valve, a hot end valve and a cam, wherein two ends of the cold end valve are respectively communicated with the cold accumulation bed and the cold end heat exchanger, and two ends of the hot end valve are respectively communicated with the cold accumulation bed and the hot end heat exchanger; the cold end valve and the hot end valve are matched with the cam so as to control the cold end valve and the hot end valve to be opened and closed alternately through the cam; wherein, the hot junction valve is closed under the cold junction valve opens the condition, and the hot junction valve is opened under the cold junction valve closes the condition. In the scheme, the magnetic refrigerator is in a modular design, the structure can be simplified, the assembly is convenient, the cam is adopted to drive the cold end valve and the hot end valve to be alternately opened and closed, and the electromagnetic valve with high use cost can be avoided. Therefore, the scheme can simplify the structure of the magnetic refrigerator and reduce the manufacturing cost.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a magnetic refrigerator according to an embodiment of the present invention;

FIG. 2 illustrates a cross-sectional A-A view of the magnetic refrigerator of FIG. 1;

fig. 3 shows a cross-sectional view of the magnetocaloric module and the valve block module of fig. 1;

fig. 4 shows a schematic structural view of the valve block module of fig. 3;

FIG. 5 shows a partial cross-sectional view B-B of FIG. 3 (with the mechanical valve in an open state);

FIG. 6 shows a partial cross-sectional view C-C of FIG. 3 (with the mechanical valve in a closed state);

fig. 7 shows a top view of the magnetic refrigerator of fig. 1 used as a window machine;

fig. 8 is a plan view showing the magnetic refrigerator of fig. 1 used as a mobile air conditioner.

Wherein the figures include the following reference numerals:

100. a heat exchange module; 110. a cold end heat exchanger; 120. a hot end heat exchanger; 130. a housing; 140. a first fan; 150. a second fan; 200. a magnetocaloric module; 210. a permanent magnet assembly; 220. a cold storage bed; 230. a rotating shaft; 240. a ferromagnetic yoke; 250. a support; 260. a motor; 300. a valve bank module; 310. a cam; 311. a first arc surface; 312. a second arc surface; 320. a mechanical valve; 321. a valve seat; 322. a valve stem; 323. an elastic member; 324. and a roller.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 8, an embodiment of the present invention provides a magnetic refrigerator, including: the heat exchange module 100, the heat exchange module 100 includes a cold-side heat exchanger 110 and a hot-side heat exchanger 120; a magnetocaloric module 200, the magnetocaloric module 200 comprising a permanent magnet assembly 210 and a cold storage bed 220, the cold storage bed 220 having a magnetocaloric material; the valve bank module 300, the valve bank module 300 includes the cold end valve, hot end valve and cam 310, both ends of the cold end valve communicate with cold storage bed 220 and cold end heat exchanger 110 separately, both ends of the hot end valve communicate with cold storage bed 220 and hot end heat exchanger 120 separately; the cold end valve and the hot end valve are matched with the cam 310, so that the cold end valve and the hot end valve are controlled to be opened and closed alternately through the cam 310; wherein, the hot junction valve is closed under the cold junction valve opens the condition, and the hot junction valve is opened under the cold junction valve closes the condition.

In the scheme, the magnetic refrigerator is in a modular design, the structure can be simplified, the assembly is convenient, the cam 310 is adopted to drive the cold end valve and the hot end valve to be alternately opened and closed, and the high-cost electromagnetic valve can be avoided. Therefore, the scheme can simplify the structure of the magnetic refrigerator and reduce the manufacturing cost.

The permanent magnet assembly 210 is rotatably disposed, the permanent magnet assembly 210 generates an alternating magnetic field, the magnetocaloric material of the cold accumulation bed 220 increases in temperature when entering the magnetic field, emits heat to the outside, decreases in temperature when exiting the magnetic field, and absorbs heat from the outside. The cold accumulation bed 220 has a cavity therein, and a refrigerant flows in the cavity of the cold accumulation bed 220 and the cavity of the heat exchanger to exchange heat. The valve bank module 300 further includes a plurality of pipes to communicate the valve, the cold accumulation bed 220, the heat exchanger, and the like.

In the present embodiment, the cold end valve includes a valve seat 321 and a valve core assembly, the valve seat 321 has a channel, and two ends of the channel are respectively communicated with the cold storage bed 220 and the cold end heat exchanger 110; the spool assembly is reciprocally disposed on the valve seat 321 to open or close the passage; the cam 310 is rotatably disposed and the cam 310 is in driving engagement with the cartridge assembly. This enables alternate opening and closing of the channels by the cam 310 driving the spool assembly to reciprocate.

Specifically, the valve core assembly comprises a valve rod 322, an elastic member 323 and a roller 324, wherein the valve rod 322 is arranged on the valve seat 321 in a reciprocating manner to open or close the channel; both ends of the elastic member 323 abut against the valve stem 322 and the valve seat 321, respectively, and the roller 324 is disposed at the end of the valve stem 322, and the cam 310 abuts against the roller 324. Movement of the valve stem 322 serves to open or close the passageway. By the contact of the roller 324 and the cam 310, wear may be reduced. The elastic member 323 applies elastic force to the valve stem 322 to move the valve stem 322 in a direction toward the cam 310.

Optionally, the valve seat 321 has a slide therein, the slide communicating with the passageway, and the valve stem 322 is movably disposed in the slide. Valve rod 322 is including the drive section, dodge section and the shutoff section of connecting in order, and the diameter of drive section and shutoff section equals the diameter of slide, dodges the diameter of section and is less than the diameter of slide. The blocking section blocks the channel under the condition that the blocking section is located at the communication position of the slide way and the channel, the channel is closed, and the avoiding section is located at the communication position of the slide way and the channel, and the channel is opened. In this embodiment, the cold side valve and the hot side valve are identical in structure.

In this embodiment, the cold storage beds 220, the cold end valves and the hot end valves are all 2N, 2N cold storage beds 220 are arranged around the permanent magnet assembly 210, each cold storage bed 220 corresponds to one cold end valve and one hot end valve, and N is a positive integer. By arranging the plurality of cold accumulation beds 220, the heat exchange effect and the energy efficiency of the magnetic refrigerator are improved.

Optionally, the magnetocaloric module 200 further includes a ferromagnetic yoke 240 in a cylindrical shape, and the cold storage bed 220 is located in the ferromagnetic yoke 240. The magnetocaloric module 200 further includes a support 250, and the cold end valve and the hot end valve are both mounted on the support 250. The bracket 250 is positioned between the adjacent cold accumulation beds 220, so that the magnetic refrigerator has a compact structure and a small volume. Specifically, the cold storage bed 220 has an arc-shaped structure.

In this embodiment, the cold-side valve and the hot-side valve are both mechanical valves 320, and N cold-side valves and N hot-side valves constitute 2N mechanical valves 320; the cams 310 are two, the rotation axes of the two cams 310 are coaxially arranged, and each cam 310 is engaged with N mechanical valves 320. The two cams 310 are provided to facilitate the on-off control of the 2N mechanical valves 320 in a large number in synchronization. Therefore, a plurality of electromagnetic valves and a complex control structure are not needed, so that the structure can be simplified, and the cost can be reduced.

Specifically, N is an even number, the outer circumferential surface of the cam 310 includes N/2 first arc surfaces 311 and N/2 second arc surfaces 312, the radius of the first arc surfaces 311 is not equal to the radius of the second arc surfaces 312, and the N/2 first arc surfaces 311 and the N/2 second arc surfaces 312 are alternately arranged in the circumferential direction of the cam 310; each first circular arc surface 311 abuts against one mechanical valve 320, each second circular arc surface 312 abuts against one mechanical valve 320, wherein the mechanical valve 320 abutting against the first circular arc surface 311 is in an open state, and the mechanical valve 320 abutting against the second circular arc surface 312 is in a closed state. Thus, the mechanical valve 320 can be opened or closed through the position change of different arc surfaces. Optionally, the cam 310 further comprises a transition surface between the first arc surface 311 and the second arc surface 312.

In this embodiment, the cam 310 is rotatably disposed, the outer peripheral surface of the cam 310 includes a first arc surface 311 and a second arc surface 312, the radius of the first arc surface 311 is not equal to the radius of the second arc surface 312, the first arc surface 311 may abut against or be separated from the cold-end valve, and the second arc surface 312 may abut against or be separated from the hot-end valve; under the condition that the first arc surface 311 is abutted to the cold end valve, the second arc surface 312 is abutted to the hot end valve; under the condition that the second arc surface 312 is abutted to the cold end valve, the first arc surface 311 is abutted to the hot end valve. Therefore, the cold end valve and the hot end valve can be opened or closed through the position change of different arc surfaces, the structure is simple, and the cost is low.

In this embodiment, the magnetic refrigerator further includes: the rotating shaft 230, the rotating shaft 230 passes through the permanent magnet assembly 210 and the cam 310 to drive the permanent magnet assembly 210 and the cam 310 to rotate synchronously. Such a rotating shaft 230 can synchronously drive the permanent magnet assembly 210 and the cam 310 to rotate, and a power source is not required to be separately provided for the permanent magnet assembly 210 and the cam 310. Therefore, the structure of the magnetic refrigerator can be simplified, the volume can be reduced, and the cost can be reduced.

Optionally, the magnetic refrigerator further includes a motor 260, and the motor 260 drives the rotation shaft 230 to rotate. The shaft 230 may be rotated in either a forward or reverse direction so that the cold side heat exchanger 110 and the hot side heat exchanger 120 may alternately cool and heat. The motor 260 is located between the cold side heat exchanger 110 and the hot side heat exchanger 120, which makes the magnetic refrigerator compact and small. The magnetic refrigerator also comprises a coupler, an upper bearing and a lower bearing. The motor 260 is coupled to the rotation shaft 230 through a coupling. The rotation shaft 230 passes through the upper and lower bearings.

In the present embodiment, the heat exchange module 100, the magnetocaloric module 200, and the valve pack module 300 are arranged along the rotation axis of the permanent magnet assembly 210, and the arrangement order of the heat exchange module 100, the magnetocaloric module 200, and the valve pack module 300 is adjustable. The magnetic refrigerator is flexible in arrangement and convenient to assemble. The three modules are assembled after being manufactured respectively, so that the production efficiency can be improved. Specifically, the placement order of the three modules may be any one of the following six cases: 1) the device comprises a magnetocaloric module, a valve bank module and a heat exchange module; 2) the device comprises a magnetocaloric module, a heat exchange module and a valve bank module; 3) the device comprises a valve bank module, a heat exchange module and a magnetocaloric module; 4) the device comprises a valve bank module, a magnetocaloric module and a heat exchange module; 5) the device comprises a heat exchange module, a valve bank module and a magnetocaloric module; 6) the device comprises a heat exchange module, a magnetocaloric module and a valve bank module.

In this embodiment, one of the cold-side heat exchanger 110 and the hot-side heat exchanger 120 is used for cooling, and the other of the cold-side heat exchanger 110 and the hot-side heat exchanger 120 is used for heating, and the heat exchange module 100 further includes: the shell 130 is provided with a first air outlet and a second air outlet, and the cold-side heat exchanger 110 and the hot-side heat exchanger 120 are both positioned in the shell 130; a first fan 140 disposed within the housing 130, the first fan 140 being located between the first air outlet and the cold side heat exchanger 110; and the second fan 150 is arranged in the shell 130, and the second fan 150 is positioned between the second air outlet and the hot-end heat exchanger 120. The gas flow can be accelerated through the arrangement, and continuous heat exchange is realized.

The magnetic refrigerator in the scheme can be used as a window machine, namely, is installed at the position of a wall or a window, and can also be used as a mobile air conditioner and is installed indoors.

To facilitate understanding of the present solution, the following is further described.

The magnetic refrigerator is divided into 3 modules, which are arranged up and down in general, and sequentially comprises a magnetocaloric module 200, a valve bank module 300 and a heat exchange module 100 from bottom to top.

The permanent magnet assembly 210 is disposed at the center of the magnetocaloric module 200, and the outermost position is disposed with the ferromagnetic yoke 240, and the ferromagnetic yoke 240 wraps all other components of the magnetocaloric module 200. The sandwiched region between the ferromagnetic yoke 240 and the permanent magnet assembly 210 houses the cold storage bed 220. Since the magnetic permeability of the ferromagnetic yoke 240 is much greater than that of air, the magnetic lines of force of the permanent magnet assembly 210 do not cross the region enclosed by the ferromagnetic yoke 240. From this, it is understood that the region where the cold storage bed 220 is located is the region where the magnetic field intensity is the maximum. The cold accumulation bed 220 is filled with a magnetocaloric material. The permanent magnet assembly 210 is assembled by splicing a plurality of permanent magnets, and continuously rotates under the driving of the rotating shaft 230 to alternately excite/demagnetize the magnetocaloric materials in the cold storage bed 220, so as to generate a magnetocaloric effect, so that the magnetocaloric materials are alternately heated/cooled, and a cooling/heating effect is achieved.

The cold and hot end heat exchangers are arranged on the left and right sides of the unit in parallel. The left opening of the cold-side heat exchanger 110 is a unit cold air outlet, and the right opening of the hot-side heat exchanger 120 is a unit hot air outlet. The upper side and the lower side of the central vertical area are provided with a unit air inlet, and cross flow fans are arranged at the left end of the cold air outlet and the right end of the hot air outlet. The air enters and exits under the action of the cross flow fan. When refrigeration is required, the cold air outlet can be arranged at the indoor side, and the hot air outlet can be arranged at the outdoor side. The cold-end heat exchanger and the hot-end heat exchanger of the unit can be interchanged, and only the motor needs to be rotated reversely, namely the rotating shaft 230 is rotated reversely, and the original cold-end heat exchanger 110 is switched into the hot-end heat exchanger 120; the raw hot side heat exchanger 120 is switched to the cold side heat exchanger 110.

The permanent magnet assembly 210 and the cam 310 are rotated by a rotating shaft 230 penetrating the 2 modules. The shaft 230 is supported by upper and lower 2 bearings and is rotated by a motor 260. The heat exchange fluid flows through the cold accumulation bed 220, exchanges heat with the magnetocaloric material therein, is guided by the pipeline to flow upwards, passes through the mechanical valve 320, and then continuously flows upwards through the heat exchanger, thereby realizing cooling/heating of the external environment.

Since the magnetocaloric material is alternately hot/cold, each cold storage bed 220 requires the switching of 2 mechanical valves 320 to control its alternating flow to the hot/cold side heat exchanger. The scheme is provided with an upper cam 310 and a lower cam 310, and 8 mechanical valves are driven to be opened and closed. 8 mechanical valves are divided into an upper layer and a lower layer, and are uniformly distributed in the circumferential direction and coordinated with the permanent magnet assembly 210 below. The working surface of the cam 310 consists of 2 1/4 circular arc large cylindrical surfaces and 2 1/4 circular arc small cylindrical surfaces. 2 cams 310 have 4 large cylindrical surfaces and 4 small cylindrical surfaces, and can control the on-off of 8 mechanical valves. When the large cylindrical surface contacts with a push rod bearing (namely a roller) of the mechanical valve, the cam pushes the push rod to move rightwards, and a spring sleeved on the push rod is compressed, so that the mechanical valve is in a conducting state, and heat exchange fluid can flow through an internal flow passage of the mechanical valve. When the small cylindrical surface contacts the push rod bearing of the mechanical valve, the spring is deformed and restored, so that the valve core moves leftwards, and the mechanical valve is in a stop state. There are 4 mechanical valves in the on state and the off state at the same time, and the fluid flow state to the cold and hot end heat exchanger is controlled respectively.

In the overall arrangement, the permanent magnet assembly 210 and the cam 310 rotate in synchronism. The mechanical valve 320 in the 4-section flow path of the cold accumulation bed 220 connected with the hot/cold end heat exchanger is driven to be conducted by the cam 310 while the permanent magnet assembly 210 excites/demagnetizes 4 cold accumulation beds 220. By the flow path design, it is ensured that the cold fluid continuously flows to the cold-side heat exchanger 110, and the hot fluid continuously flows to the hot-side heat exchanger 120. Therefore, the use of an expensive electromagnetic valve with short service life is avoided, the unit cost is reduced, and the unit operation reliability is improved. In addition, the prototype has no complicated transmission mechanism and control system, can fully utilize the internal space, has smaller volume of the whole prototype, and is favorable for subsequent commercial popularization.

The utility model discloses the characteristics of creation lie in:

1. the whole machine is arranged in a modular assembly form, 3 functional modules are provided in total, and the magnetic heating module, the valve bank module and the heat exchange module are respectively arranged from bottom to top according to space.

2. The mechanical valve 320 is pushed to extend and contract by the working faces of 2 cams 310 arranged up and down (each cam has two pairs of 1/4 circular cylindrical faces with one larger and one smaller as the working faces) so as to switch the off/on state of the mechanical valve.

3. The permanent magnet assembly 210 and the cam 310 are designed to have a specific positional relationship to ensure that when the permanent magnet assembly 210 excites a cold storage bed 220, the flow path through the bed to the hot side heat exchanger 120 is open and the flow path to the cold side heat exchanger 110 is closed. During degaussing, the flow path through the bed to the hot side heat exchanger 120 is closed and the flow path to the cold side heat exchanger 110 is open.

The scheme has the following beneficial effects:

1. the inventive layout of the valve module, the magnetic heating module and the heat exchange module optimizes the route of the traveling pipe, optimizes the assembly mode of the components of the unit, improves the utilization rate of the internal space of the unit and reduces the volume of the unit.

2. By adopting the fluid control method of driving the mechanical valve to be opened and closed by the cam, the cam and the permanent magnet assembly can be driven to rotate by only one motor, so that the cost of a power source part is reduced.

3. The fluid control method of opening and closing the mechanical valve by the cam is adopted, so that the use of a high-cost electromagnetic valve is avoided, a controller system is simplified, and the cost of the part can be greatly reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A magnetic refrigerator, comprising:

a heat exchange module (100), the heat exchange module (100) comprising a cold side heat exchanger (110) and a hot side heat exchanger (120);

a magnetocaloric module (200), the magnetocaloric module (200) comprising a permanent magnet assembly (210) and a cold storage bed (220), the cold storage bed (220) having a magnetocaloric material;

the valve bank module (300) comprises a cold end valve, a hot end valve and a cam (310), two ends of the cold end valve are respectively communicated with the cold accumulation bed (220) and the cold end heat exchanger (110), and two ends of the hot end valve are respectively communicated with the cold accumulation bed (220) and the hot end heat exchanger (120); the cold end valve and the hot end valve are matched with the cam (310) so as to control the cold end valve and the hot end valve to be opened and closed alternately through the cam (310); wherein the hot end valve is closed when the cold end valve is opened, and the hot end valve is opened when the cold end valve is closed.

2. The magnetic refrigerator according to claim 1, wherein the cold end valve comprises a valve seat (321) and a valve core assembly, the valve seat (321) is provided with a channel, and two ends of the channel are respectively communicated with the cold accumulation bed (220) and the cold end heat exchanger (110); the valve core assembly is arranged on the valve seat (321) in a reciprocating manner to open or close the channel; the cam (310) is rotatably arranged, and the cam (310) is in driving fit with the valve core assembly.

3. The magnetic refrigerator according to claim 2, wherein the core assembly includes a valve stem (322), an elastic member (323) and a roller (324), the valve stem (322) being reciprocally disposed on the valve seat (321) to open or close the passage; two ends of the elastic piece (323) are respectively abutted against the valve rod (322) and the valve seat (321), the roller (324) is arranged at the end part of the valve rod (322), and the cam (310) is abutted against the roller (324).

4. A magnetic refrigerator in accordance with claim 1, characterized by that the cold accumulation bed (220), the cold end valve and the hot end valve are all 2N, 2N cold accumulation beds (220) are arranged around the permanent magnet assembly (210), each cold accumulation bed (220) corresponds to one cold end valve and one hot end valve, where N is a positive integer.

5. A magnetic refrigerator according to claim 4, characterized in that the cold end valve and the hot end valve are both mechanical valves (320), N of the cold end valves and N of the hot end valves constituting 2N of the mechanical valves (320); the number of the cams (310) is two, the rotation axes of the two cams (310) are coaxially arranged, and each cam (310) is matched with N mechanical valves (320).

6. A magnetic refrigerator according to claim 5,

n is an even number, the outer peripheral surface of the cam (310) comprises N/2 first arc surfaces (311) and N/2 second arc surfaces (312), the radius of the first arc surfaces (311) is not equal to that of the second arc surfaces (312), and the N/2 first arc surfaces (311) and the N/2 second arc surfaces (312) are alternately arranged in the circumferential direction of the cam (310);

every first arc surface (311) and one mechanical valve (320) butt, every second arc surface (312) and one mechanical valve (320) butt, wherein, with first arc surface (311) butt mechanical valve (320) are in the open mode, and second arc surface (312) butt mechanical valve (320) are in the closed mode.

7. A magnetic refrigerator according to claim 1,

the cam (310) is rotatably arranged, the outer peripheral surface of the cam (310) comprises a first arc surface (311) and a second arc surface (312), the radius of the first arc surface (311) is not equal to that of the second arc surface (312), the first arc surface (311) can be abutted to or separated from the cold end valve, and the second arc surface (312) can be abutted to or separated from the hot end valve;

under the condition that the first arc surface (311) is abutted with the cold end valve, the second arc surface (312) is abutted with the hot end valve; and under the condition that the second arc surface (312) is abutted with the cold end valve, the first arc surface (311) is abutted with the hot end valve.

8. A magnetic refrigerator according to claim 1, further comprising:

the rotating shaft (230) penetrates through the permanent magnet assembly (210) and the cam (310) so as to drive the permanent magnet assembly (210) and the cam (310) to rotate synchronously.

9. The magnetic refrigerator according to claim 1, characterized in that the heat exchange module (100), the magnetocaloric module (200) and the valve pack module (300) are arranged along the axis of rotation of the permanent magnet assembly (210), and the arrangement order of the heat exchange module (100), the magnetocaloric module (200) and the valve pack module (300) is adjustable.

10. A magnetic refrigerator according to claim 1 wherein one of the cold side heat exchanger (110) and the hot side heat exchanger (120) is used for cooling and the other of the cold side heat exchanger (110) and the hot side heat exchanger (120) is used for heating, the heat exchange module (100) further comprising:

a housing (130), the housing (130) having a first air outlet and a second air outlet, the cold side heat exchanger (110) and the hot side heat exchanger (120) both being located within the housing (130);

a first fan (140) disposed within the housing (130), the first fan (140) being located between the first air outlet and the cold end heat exchanger (110);

and the second fan (150) is arranged in the shell (130), and the second fan (150) is positioned between the second air outlet and the hot-end heat exchanger (120).

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