Magnetic refrigerator

Abstract

The present invention provides a magnetic refrigeration machine, which includes a heat exchange module, a magnetic heat module and a valve group module. The heat exchange module includes a cold-end heat exchanger and a hot-end heat exchanger; the magnetic heat module includes a permanent magnet assembly and a cold storage bed, and the cold storage bed is provided with magnetic heat materials; the valve group module includes a cold-end valve, a hot-end valve and a cam. Both ends of the cold-end valve are respectively communicated with the cold storage bed and the cold-end heat exchanger, and both ends of the hot-end valve are respectively communicated with the cold storage bed and the hot-end heat exchanger; both the cold-end valve and the hot-end valve are cooperated with the cam to alternately open and close the cold-end valve and the hot-end valve through the cam; wherein, when the cold-end valve is open, the hot-end valve is closed, and when the cold-end valve is closed, the hot-end valve is open. This solution adopts a modular design for the magnetic refrigeration machine, which can simplify the structure and facilitate assembly. By using the cam to drive the cold-end valve and the hot-end valve to alternately open and close, the use of solenoid valves with high cost can be avoided. Therefore, this solution can simplify the structure and reduce the manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic refrigeration, and more particularly, to a magnetic refrigerator. Background Art

[0002] Magnetic refrigeration utilizes the magnetocaloric effect of magnetic refrigeration materials: when the magnetic refrigeration material enters a magnetic field, its temperature rises and it releases heat to the outside; when it exits the magnetic field, its temperature drops and it absorbs heat from the outside. It has the advantages of energy conservation, environmental protection, and low noise, and has the potential to replace vapor compression refrigeration technology.

[0003] However, in terms of the current research progress, there are still technical problems to be solved for the application of magnetic refrigeration technology in products. The main problems of current magnetic refrigerators are: complex structure, large volume, and high cost. Therefore, it is difficult to promote its commercial application. Summary of the Invention

[0004] The present invention provides a magnetic refrigerator to simplify the structure of the magnetic refrigerator and reduce the manufacturing cost.

[0005] To achieve the above object, the present invention provides a magnetic refrigerator, including: a heat exchange module, the heat exchange module including a cold-end heat exchanger and a hot-end heat exchanger; a magnetocaloric module, the magnetocaloric module including a permanent magnet assembly and a cold storage bed, the cold storage bed having a magnetocaloric material; a valve group module, the valve group module including a cold-end valve, a hot-end valve, and a cam, both ends of the cold-end valve being respectively communicated with the cold storage bed and the cold-end heat exchanger, both ends of the hot-end valve being respectively communicated with the cold storage bed and the hot-end heat exchanger; the cold-end valve and the hot-end valve are both cooperated with the cam to alternately open and close the cold-end valve and the hot-end valve through the cam; wherein, when the cold-end valve is open, the hot-end valve is closed, and when the cold-end valve is closed, the hot-end valve is open.

[0006] Further, the cold-end valve includes a valve seat and a valve core assembly, the valve seat having a channel, both ends of the channel being respectively communicated with the cold storage bed and the cold-end heat exchanger; the valve core assembly is movably arranged on the valve seat in a reciprocating manner to open or close the channel; the cam is rotatably arranged, and the cam is drivingly cooperated with the valve core assembly.

[0007] Further, the valve core assembly includes a valve rod, an elastic member, and a roller, the valve rod is movably arranged on the valve seat in a reciprocating manner to open or close the channel; both ends of the elastic member are respectively abutted against the valve rod and the valve seat, the roller is arranged at the end of the valve rod, and the cam abuts against the roller.

[0008] Further, there are 2N cold storage beds, 2N cold-end valves and 2N hot-end valves. The 2N cold storage beds are arranged around the permanent magnet assembly, and each cold storage bed corresponds to one cold-end valve and one hot-end valve, where N is a positive integer.

[0009] Further, both the cold-end valves and the hot-end valves are mechanical valves. N cold-end valves and N hot-end valves form 2N mechanical valves; there are two cams, and the rotation axes of the two cams are coaxially arranged, and each cam cooperates with N mechanical valves.

[0010] Further, N is an even number. The outer peripheral surface of the cam includes N / 2 first arc surfaces and N / 2 second arc surfaces. The radii of the first arc surfaces and the second arc surfaces are not equal, and the N / 2 first arc surfaces and the N / 2 second arc surfaces are alternately arranged in the circumferential direction of the cam; each first arc surface abuts against one mechanical valve, and each second arc surface abuts against one mechanical valve. Among them, the mechanical valve abutting against the first arc surface is in an open state, and the mechanical valve abutting against the second arc surface is in a closed state.

[0011] Further, the cam is rotatably arranged. The outer peripheral surface of the cam includes a first arc surface and a second arc surface. The radii of the first arc surface and the second arc surface are not equal. The first arc surface can abut against or separate from the cold-end valve, and the second arc surface can abut against or separate from the hot-end valve; among them, when the first arc surface abuts against the cold-end valve, the second arc surface abuts against the hot-end valve; when the second arc surface abuts against the cold-end valve, the first arc surface abuts against the hot-end valve.

[0012] Further, the magnetic refrigerator further includes: a rotating shaft, and the rotating shaft passes through the permanent magnet assembly and the cam to drive the permanent magnet assembly and the cam to rotate synchronously.

[0013] Further, the heat exchange module, the magnetic heat module and the valve group module are arranged along the rotation axis of the permanent magnet assembly, and the arrangement order of the heat exchange module, the magnetic heat module and the valve group module can be adjusted.

[0014] Further, one of the cold-end heat exchanger and the hot-end heat exchanger is used for refrigeration, and the other of the cold-end heat exchanger and the hot-end heat exchanger is used for heating. The heat exchange module further includes: a housing having a first air outlet and a second air outlet, wherein the cold-end heat exchanger and the hot-end heat exchanger are both located in the housing; a first fan disposed in the housing, the first fan being located between the first air outlet and the cold-end heat exchanger; and a second fan disposed in the housing, the second fan being located between the second air outlet and the hot-end heat exchanger.

[0015] Applying the technical solution of the present invention, a magnetic refrigerator is provided, which includes a heat exchange module, a magnetocaloric module and a valve group module. The heat exchange module includes a cold-end heat exchanger and a hot-end heat exchanger; the magnetocaloric module includes a permanent magnet assembly and a cold storage bed, and the cold storage bed has magnetocaloric materials; the valve group module includes a cold-end valve, a hot-end valve and a cam. Two ends of the cold-end valve are respectively communicated with the cold storage bed and the cold-end heat exchanger, and two ends of the hot-end valve are respectively communicated with the cold storage bed and the hot-end heat exchanger; both the cold-end valve and the hot-end valve are cooperated with the cam to alternately open and close the cold-end valve and the hot-end valve through the cam; wherein, when the cold-end valve is open, the hot-end valve is closed, and when the cold-end valve is closed, the hot-end valve is open. In this solution, the magnetic refrigerator is designed in a modular manner, which can simplify the structure and facilitate assembly. The cam is used to drive the cold-end valve and the hot-end valve to alternately open and close, which can avoid using solenoid valves with high usage costs. Therefore, this solution can simplify the structure of the magnetic refrigerator and reduce the manufacturing cost. Description of the Drawings

[0016] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of the magnetic refrigerator provided by the embodiment of the present invention is shown;

[0018] Figure 2 Shows Figure 1 The A-A cross-sectional view of the magnetic refrigerator in

[0019] Figure 3 Shows Figure 1 The cross-sectional view of the magnetocaloric module and the valve group module in

[0020] Figure 4 Shows Figure 3 The schematic structural diagram of the valve group module in

[0021] Figure 5 Shows Figure 3 The B-B partial cross-sectional view of (the mechanical valve is in the open state);

[0022] Figure 6 shows Figure 3 a partial cross-sectional view of C-C (the mechanical valve is in the closed state);

[0023] Figure 7 shows Figure 1 a top view of the magnetic refrigeration machine in used as a window air conditioner;

[0024] Figure 8 shows Figure 1 a top view of the magnetic refrigeration machine in used as a mobile air conditioner.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 100, heat exchange module; 110, cold-end heat exchanger; 120, hot-end heat exchanger; 130, housing; 140, first fan; 150, second fan; 200, magnetocaloric module; 210, permanent magnet assembly; 220, cold storage bed; 230, rotating shaft; 240, ferromagnetic yoke; 250, bracket; 260, motor; 300, valve group module; 310, cam; 311, first arc surface; 312, second arc surface; 320, mechanical valve; 321, valve seat; 322, valve stem; 323, elastic member; 324, roller. Specific Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] As Figures 1 to 8 shown, an embodiment of the present invention provides a magnetic refrigeration machine, including: a heat exchange module 100, the heat exchange module 100 includes a cold-end heat exchanger 110 and a hot-end heat exchanger 120; a magnetocaloric module 200, the magnetocaloric module 200 includes a permanent magnet assembly 210 and a cold storage bed 220, and the cold storage bed 220 has magnetocaloric materials; a valve group module 300, the valve group module 300 includes a cold-end valve, a hot-end valve and a cam 310, both ends of the cold-end valve are respectively communicated with the cold storage bed 220 and the cold-end heat exchanger 110, and both ends of the hot-end valve are respectively communicated with the cold storage bed 220 and the hot-end heat exchanger 120; both the cold-end valve and the hot-end valve cooperate with the cam 310 to control the cold-end valve and the hot-end valve to be alternately opened and closed through the cam 310; wherein, when the cold-end valve is opened, the hot-end valve is closed, and when the cold-end valve is closed, the hot-end valve is opened.

[0029] In this solution, the magnetic refrigerator is designed modularly, which can simplify the structure and facilitate assembly. The cam 310 is used to drive the cold-end valve and the hot-end valve to open and close alternately, avoiding the use of solenoid valves with high cost. Therefore, this solution can simplify the structure of the magnetic refrigerator and reduce the manufacturing cost.

[0030] Among them, the permanent magnet assembly 210 is rotatably arranged. The permanent magnet assembly 210 generates an alternating magnetic field. When the magnetocaloric material in the regenerator bed 220 enters the magnetic field, its temperature rises and it releases heat to the outside. When it exits the magnetic field, its temperature drops and it absorbs heat from the outside. The regenerator bed 220 has a cavity, and the refrigerant flows in the cavity of the regenerator bed 220 and the cavity of the heat exchanger for heat exchange. The valve group module 300 also includes a plurality of pipelines to connect structures such as valves, the regenerator bed 220, and the heat exchanger.

[0031] In this embodiment, the cold-end valve includes a valve seat 321 and a valve core assembly. The valve seat 321 has a channel, and both ends of the channel are respectively connected to the regenerator bed 220 and the cold-end heat exchanger 110. The valve core assembly is movably arranged on the valve seat 321 to open or close the channel. The cam 310 is rotatably arranged, and the cam 310 is drivingly engaged with the valve core assembly. In this way, by driving the valve core assembly to move back and forth by the cam 310, the channel can be alternately opened or closed.

[0032] Specifically, the valve core assembly includes a valve rod 322, an elastic member 323, and a roller 324. The valve rod 322 is movably arranged on the valve seat 321 to open or close the channel. Both ends of the elastic member 323 are respectively abutted against the valve rod 322 and the valve seat 321. The roller 324 is arranged at the end of the valve rod 322, and the cam 310 is abutted against the roller 324. The movement of the valve rod 322 is used to open or close the channel. By contacting the roller 324 with the cam 310, wear can be reduced. The elastic member 323 exerts an elastic force on the valve rod 322 to make the valve rod 322 move in the direction towards the cam 310.

[0033] Optionally, the valve seat 321 has a slideway, the slideway is communicated with the channel, and the valve rod 322 is movably arranged in the slideway. The valve rod 322 includes a driving section, an avoidance section, and a blocking section connected in sequence. The diameters of the driving section and the blocking section are equal to the diameter of the slideway, and the diameter of the avoidance section is smaller than the diameter of the slideway. When the blocking section is located at the communication position of the slideway and the channel, the blocking section blocks the channel and the channel is closed. When the avoidance section is located at the communication position of the slideway and the channel, the channel is opened. In this embodiment, the cold-end valve and the hot-end valve have the same structure.

[0034] In this embodiment, there are 2N cold storage beds 220, cold-end valves, and hot-end valves. The 2N cold storage beds 220 are arranged around the permanent magnet assembly 210. Each cold storage bed 220 corresponds to a cold-end valve and a hot-end valve, where N is a positive integer. By providing multiple cold storage beds 220, the heat exchange effect and energy efficiency of the magnetic refrigerator are improved.

[0035] Optionally, the magnetic heat module 200 further includes a cylindrical ferromagnetic yoke 240, and the cold storage bed 220 is located inside the ferromagnetic yoke 240. The magnetic heat module 200 further includes a bracket 250, and both the cold-end valve and the hot-end valve are mounted on the bracket 250. The bracket 250 is located between adjacent cold storage beds 220, which can make the structure of the magnetic refrigerator compact and small in volume. Specifically, the cold storage bed 220 is of an arc structure.

[0036] In this embodiment, both the cold-end valve and the hot-end valve are mechanical valves 320. The N cold-end valves and the N hot-end valves form 2N mechanical valves 320; there are two cams 310, and the rotation axes of the two cams 310 are coaxially arranged. Each cam 310 cooperates with the N mechanical valves 320. By providing two cams 310, it is convenient to synchronously control the opening and closing of the relatively large number of 2N mechanical valves 320. In this way, it is not necessary to use multiple solenoid valves and complex control structures, thereby simplifying the structure and reducing costs.

[0037] Specifically, N is an even number. The outer peripheral surface of the cam 310 includes N / 2 first arc surfaces 311 and N / 2 second arc surfaces 312. The radii of the first arc surface 311 and the second arc surface 312 are not equal, 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 arc surface 311 abuts against a mechanical valve 320, and each second arc surface 312 abuts against a mechanical valve 320. Among them, the mechanical valve 320 in contact with the first arc surface 311 is in an open state, and the mechanical valve 320 in contact with the second arc surface 312 is in a closed state. In this way, by changing the positions of different arc surfaces, the opening or closing of the mechanical valve 320 can be realized. Optionally, the cam 310 further includes a transition surface located between the first arc surface 311 and the second arc surface 312.

[0038] In this embodiment, the cam 310 is rotatably arranged. The outer peripheral surface of the cam 310 includes a first arc surface 311 and a second arc surface 312. The radii of the first arc surface 311 and the second arc surface 312 are not equal. The first arc surface 311 can abut against or separate from the cold-end valve, and the second arc surface 312 can abut against or separate from the hot-end valve. Wherein, when the first arc surface 311 abuts against the cold-end valve, the second arc surface 312 abuts against the hot-end valve; when the second arc surface 312 abuts against the cold-end valve, the first arc surface 311 abuts against the hot-end valve. In this way, by changing the positions of different arc surfaces, the opening or closing of the cold-end valve and the hot-end valve can be realized, and the structure is simple and the cost is low.

[0039] In this embodiment, the magnetic refrigerator further includes a 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. In this way, one rotating shaft 230 can synchronously drive the permanent magnet assembly 210 and the cam 310 to rotate, and there is no need to separately provide power sources 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 lowered.

[0040] Optionally, the magnetic refrigerator further includes a motor 260. The motor 260 drives the rotating shaft 230 to rotate. The rotating shaft 230 can rotate forward or backward, so that the cold-end heat exchanger 110 and the hot-end heat exchanger 120 can alternately refrigerate and heat. The motor 260 is located between the cold-end heat exchanger 110 and the hot-end heat exchanger 120, so that the structure of the magnetic refrigerator can be compact and the volume can be small. The magnetic refrigerator further includes a coupling, an upper bearing, and a lower bearing. The motor 260 is connected to the rotating shaft 230 through the coupling. The rotating shaft 230 passes through the upper bearing and the lower bearing.

[0041] In this embodiment, the heat exchange module 100, the magnetic heat module 200, and the valve group 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 magnetic heat module 200, and the valve group module 300 can be adjusted. In this way, the magnetic refrigerator is flexibly arranged and convenient for assembly. After the three modules are separately manufactured and then assembled, the production efficiency can be improved. Specifically, the placement order of the three modules can be any one of the following six situations: 1) magnetic heat module, valve group module, heat exchange module; 2) magnetic heat module, heat exchange module, valve group module; 3) valve group module, heat exchange module, magnetic heat module; 4) valve group module, magnetic heat module, heat exchange module; 5) heat exchange module, valve group module, magnetic heat module; 6) heat exchange module, magnetic heat module, valve group module.

[0042] In this embodiment, one of the cold-end heat exchanger 110 and the hot-end heat exchanger 120 is used for refrigeration, and the other is used for heating. The heat exchange module 100 further includes: a housing 130 having a first air outlet and a second air outlet, and both the cold-end heat exchanger 110 and the hot-end heat exchanger 120 are located inside the housing 130; a first fan 140 disposed inside the housing 130, and the first fan 140 is located between the first air outlet and the cold-end heat exchanger 110; a second fan 150 disposed inside the housing 130, and the second fan 150 is located between the second air outlet and the hot-end heat exchanger 120. Through the above settings, the gas flow can be accelerated to achieve continuous heat exchange.

[0043] The magnetic refrigerator in this solution can be used as a window unit, that is, installed in the position of a wall or a window, or can be used as a mobile air conditioner and installed indoors.

[0044] To facilitate the understanding of this solution, further explanations are given below.

[0045] The magnetic refrigerator is divided into three modules, with an overall structure layout arranged vertically from top to bottom. From bottom to top, they are the magnetocaloric module 200, the valve group module 300, and the heat exchange module 100.

[0046] The permanent magnet assembly 210 is arranged at the central position of the magnetocaloric module 200, and the ferromagnetic yoke 240 is placed at the outermost position, and the ferromagnetic yoke 240 wraps all other components of the magnetocaloric module 200. The regenerator 220 is placed in the sandwich area between the ferromagnetic yoke 240 and the permanent magnet assembly 210. Since the magnetic conductivity of the ferromagnetic yoke 240 is much greater than that of air, the magnetic lines of force of the permanent magnet assembly 210 will not go beyond the area wrapped by the ferromagnetic yoke 240. It can be seen that the area where the regenerator 220 is located is the area with the maximum magnetic field intensity. The regenerator 220 is filled with magnetocaloric materials. The permanent magnet assembly 210 is assembled by splicing several permanent magnets and continuously rotates under the drive of the rotating shaft 230 to alternately magnetize / demagnetize the magnetocaloric materials in the regenerator 220, thereby generating a magnetocaloric effect, making the magnetocaloric materials alternately heat up / cool down, achieving the effect of refrigeration / heating.

[0047] The cold and hot end heat exchangers are placed in parallel on the left and right sides of the unit. The left opening of the cold-end heat exchanger 110 is the cold air outlet of the unit, and the right opening of the hot-end heat exchanger 120 is the hot air outlet of the unit. The upper and lower sides of the central vertical area are the air inlets of the unit, and cross-flow fans are placed at the left end of the cold air outlet and the right end of the hot air outlet. The air flows in and out under the action of the cross-flow fans. When refrigeration is required, the cold air outlet can be placed on the indoor side and the hot air outlet on the outdoor side. The cold and hot end heat exchangers of the unit can be interchanged, and only the motor needs to be reversed, that is, the rotating shaft 230 is reversed, and the original cold-end heat exchanger 110 is switched to the hot-end heat exchanger 120; the original hot-end heat exchanger 120 is switched to the cold-end heat exchanger 110.

[0048] The permanent magnet assembly 210 and the cam 310 are driven to rotate by a rotating shaft 230 passing through the two modules. The rotating shaft 230 is supported by two bearings, upper and lower, and is driven to rotate by a motor 260. The heat exchange fluid flows through the cold storage bed 220, exchanges heat with the magnetocaloric material therein, and then is guided to flow upward through the pipeline, passes through the mechanical valve 320, and then continues to flow upward through the heat exchanger, thereby realizing refrigeration / heating of the external environment.

[0049] Since the magnetocaloric material alternately heats up / cools down, each cold storage bed 220 requires the opening and closing of two mechanical valves 320 to control its alternating flow to the hot / cold end heat exchangers. In this solution, two cams 310, upper and lower, are provided to drive the opening and closing of eight mechanical valves. The eight mechanical valves are divided into two layers, upper and lower, and are circumferentially evenly distributed, and are coordinated with the permanent magnet assembly 210 below. The working surface of the cam 310 is composed of two 1 / 4 circular arc large cylindrical surfaces and two 1 / 4 circular arc small cylindrical surfaces. The two cams 310 have four large cylindrical surfaces and four small cylindrical surfaces, which can control the opening and closing of eight mechanical valves. When the large cylindrical surface contacts the mechanical valve push rod bearing (i.e., the roller), the cam pushes the push rod to move to the right, compresses the spring sleeved on the push rod, so that the mechanical valve is in the conducting state, and the heat exchange fluid can flow through its internal flow path. When the small cylindrical surface contacts the mechanical valve push rod bearing, the spring deforms and recovers, causing the valve core to move to the left, so that the mechanical valve is in the cut-off state. At the same time, four mechanical valves are in the conducting state and four are in the cut-off state, respectively controlling the fluid flow states leading to the cold and hot end heat exchangers.

[0050] In the overall layout, the permanent magnet assembly 210 and the cam 310 rotate synchronously. While the permanent magnet assembly 210 magnetizes / demagnetizes four of the cold storage beds 220, the mechanical valves 320 in the four flow paths connecting the cold storage bed 220 to the hot / cold end heat exchangers are driven to conduct by the cam 310. Through the flow path design, it is ensured that the cold fluid continuously flows to the cold end heat exchanger 110, and the hot fluid continuously flows to the hot end heat exchanger 120. This avoids the use of expensive and short-service-life solenoid valves, reduces the cost of the unit, and increases the operating reliability of the unit. In addition, this prototype has no complex transmission mechanism and control system, can make full use of the internal space, makes the overall volume of the machine more compact, and is conducive to subsequent commercial promotion.

[0051] The features of this invention are as follows:

[0052] 1. The whole machine is set in a modular assembly form, with a total of three functional modules, which are, from bottom to top in space, the magnetocaloric module, the valve group module, and the heat exchange module.

[0053] 2. The working surfaces of two cams 310 arranged vertically (each cam has two pairs of 1 / 4 circular arc cylindrical surfaces, one large and one small, as the working surfaces) push the mechanical valve 320 to expand and contract to switch the cut-off / conducting state of the mechanical valve.

[0054] 3. A specific positional relationship is designed between the permanent magnet assembly 210 and the cam 310 to ensure that when the permanent magnet assembly 210 excites a certain cold storage bed 220, the flow channel leading to the hot end heat exchanger 120 through this bed is connected, and the flow channel leading to the cold end heat exchanger 110 is closed. When demagnetized, the flow channel leading to the hot end heat exchanger 120 through this bed is closed, and the flow channel leading to the cold end heat exchanger 110 is connected.

[0055] This solution has the following beneficial effects:

[0056] 1. The creative layout of the valve module, magnetocaloric module, and heat exchange module optimizes the pipe routing path and the assembly method of the components of the unit, improves the utilization rate of the internal space of the unit, and reduces the volume of the unit.

[0057] 2. The fluid control method of using a cam to drive the opening and closing of a mechanical valve enables the cam and the permanent magnet assembly to be rotated by only one motor, reducing the cost of the power source part.

[0058] 3. The fluid control method of using a cam to drive the opening and closing of a mechanical valve avoids the use of solenoid valves with high costs and simplifies the controller system, and the cost of this part can be greatly reduced.

[0059] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A magnetic refrigeration machine, characterized in that, it includes: a heat exchange module (100), the heat exchange module (100) includes a cold-end heat exchanger (110) and a hot-end heat exchanger (120); a magnetocaloric module (200), the magnetocaloric module (200) includes a permanent magnet assembly (210) and a regenerator bed (220), and the regenerator bed (220) has magnetocaloric materials; a valve group module (300), the valve group module (300) includes a cold-end valve, a hot-end valve and a cam (310), both ends of the cold-end valve are respectively communicated with the regenerator bed (220) and the cold-end heat exchanger (110), and both ends of the hot-end valve are respectively communicated with the regenerator bed (220) and the hot-end heat exchanger (120); the cold-end valve and the hot-end valve are both cooperated with the cam (310) to alternately open and close the cold-end valve and the hot-end valve through the cam (310); wherein, when the cold-end valve is open, the hot-end valve is closed, and when the cold-end valve is closed, the hot-end valve is open; the magnetocaloric module (200) further includes a cylindrical ferromagnetic yoke (240), and the regenerator bed (220) is located inside the ferromagnetic yoke (240); the regenerator bed (220), the cold-end valve and the hot-end valve are all 2N in number, and the 2N regenerator beds (220) are arranged around the permanent magnet assembly (210), and each regenerator bed (220) corresponds to one cold-end valve and one hot-end valve, wherein, N is a positive integer.

2. The magnetic refrigeration machine according to claim 1, characterized in that, the cold-end valve includes a valve seat (321) and a valve core assembly, the valve seat (321) has a channel, and both ends of the channel are respectively communicated with the regenerator bed (220) and the cold-end heat exchanger (110); the valve core assembly is movably 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 drivingly cooperated with the valve core assembly.

3. The magnetic refrigeration machine according to claim 2, characterized in that, the valve core assembly includes a valve rod (322), an elastic member (323) and a roller (324), the valve rod (322) is movably arranged on the valve seat (321) in a reciprocating manner to open or close the channel; both ends of the elastic member (323) are respectively abutted against the valve rod (322) and the valve seat (321), the roller (324) is arranged at the end of the valve rod (322), and the cam (310) is abutted against the roller (324).

4. The magnetic refrigeration machine according to claim 1, characterized in that, both the cold-end valve and the hot-end valve are mechanical valves (320), and N cold-end valves and N hot-end valves form 2N mechanical valves (320); there are two cams (310), and the rotation axes of the two cams (310) are coaxially arranged, and each cam (310) is cooperated with N mechanical valves (320).

5. The magnetic refrigeration machine according to claim 4, characterized in that, N is an even number, the outer peripheral surface of the cam (310) includes N / 2 first arc surfaces (311) and N / 2 second arc surfaces (312), the radii of the first arc surfaces (311) and the second arc surfaces (312) are not equal, 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 of the first arc surfaces (311) abuts against a mechanical valve (320), and each of the second arc surfaces (312) abuts against a mechanical valve (320), wherein the mechanical valve (320) abutting against the first arc surface (311) is in an open state, and the mechanical valve (320) abutting against the second arc surface (312) is in a closed state.

6. The magnetic refrigeration machine according to claim 1, characterized in that, the cam (310) is rotatably arranged, the outer peripheral surface of the cam (310) includes a first arc surface (311) and a second arc surface (312), the radii of the first arc surface (311) and the second arc surface (312) are not equal, the first arc surface (311) can abut against or be separated from the cold end valve, and the second arc surface (312) can abut against or be separated from the hot end valve; wherein, when the first arc surface (311) abuts against the cold end valve, the second arc surface (312) abuts against the hot end valve; when the second arc surface (312) abuts against the cold end valve, the first arc surface (311) abuts against the hot end valve.

7. The magnetic refrigeration machine according to claim 1, characterized in that, the magnetic refrigeration machine further includes: a 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.

8. The magnetic refrigeration machine according to claim 1, characterized in that, the heat exchange module (100), the magnetothermal module (200) and the valve group 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 magnetothermal module (200) and the valve group module (300) can be adjusted.

9. The magnetic refrigeration machine according to claim 1, characterized in that, one of the cold end heat exchanger (110) and the hot end heat exchanger (120) is used for refrigeration, and the other of the cold end heat exchanger (110) and the hot end heat exchanger (120) is used for heating. The heat exchange module (100) further includes: a housing (130), the housing (130) has a first air outlet and a second air outlet, and both the cold end heat exchanger (110) and the hot end heat exchanger (120) are located inside the housing (130); The first fan (140) is disposed within the housing (130), and the first fan (140) is located between the first air outlet and the cold-end heat exchanger (110); The second fan (150) is disposed within the housing (130), and the second fan (150) is located between the second air outlet and the hot-end heat exchanger (120).

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