Magnetic compression coupling refrigeration device

Abstract

The application discloses a magnetic pressure coupling refrigeration device, which comprises a water piston, a hot-end heat exchanger, a cold-end heat exchanger, a magnetic pressure regenerator, a first driving member and a second driving member. The water piston comprises a piston cylinder, a pear-shaped workpiece and two pistons arranged in the piston cylinder. The two pistons are symmetrically arranged on the two sides of the pear-shaped workpiece and abut against the pear-shaped workpiece. The left cavity and the right cavity of the water piston are sequentially communicated with the hot-end heat exchanger, the cold-end heat exchanger and the magnetic pressure regenerator through pipelines. A plurality of electromagnetic valves are arranged on the pipelines. The outer periphery of the magnetic pressure regenerator is sleeved with double-layer concentric Halbach magnets. The first driving member is connected to the pear-shaped workpiece and the inner-layer concentric Halbach magnet. The second driving member is connected to the pear-shaped workpiece and used for driving the pear-shaped workpiece to move horizontally along the piston cylinder. The device combines the magnetic heat effect and the pressure heat effect, adopts a clever structure design, realizes the magnetic pressure coupling refrigeration, reduces the volume of the refrigeration device and improves the refrigeration efficiency of the refrigeration device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of refrigeration and low temperature technology, and particularly relates to a magnetic pressure coupling refrigeration device. BACKGROUND

[0002] The cooling technology widely existing in modern society accounts for a considerable proportion in the energy consumption and greenhouse gas emission in the world. The space refrigeration and refrigeration based on vapor compression consumes 20% of the total power generation, and some commonly used refrigerants have a greenhouse effect one thousand times higher than that of CO2. The vapor compression technology in the past two centuries is highly optimized and efficient, but the requirements of reducing greenhouse gas emission and improving energy efficiency are driving the research of new refrigeration technology. Among the new refrigeration technologies, the solid-state refrigeration technology shows great potential. Solid materials undergo reversible phase transition and exhibit temperature change. Materials responsive to magnetic field, electric field or stress field are called magnetocaloric, electrocaloric and elastocaloric materials, respectively. The solid-state refrigeration technology has very high energy conversion efficiency and does not emit greenhouse gas.

[0003] In this field, one particularly exciting new direction is the multi-field coupling material system, and the multi-thermal material can apply multiple fields (magnetic field, electric field or stress) to pump heat from low temperature to high temperature, which is a new trend in this field. Similar to the stress conversion from magnetostrictive material to piezoelectric material (or vice versa) in multi-ferroic composite materials, magnetic pressure coupling can also achieve refrigeration under multi-field coupling through the response of magnetic field and hydrostatic pressure.

[0004] In the related art, the current refrigeration device has a single scene, and either the refrigeration device is large in size or the refrigeration efficiency is low. No results of magnetic pressure coupling device have been published, and in-depth research is needed in the aspects of high-performance device preparation, efficient process design and device integration. SUMMARY

[0005] To solve at least one problem mentioned in the background art, the purpose of the present application is to provide a magnetic pressure coupling refrigeration device.

[0006] The present application is implemented by the following technical solutions:

[0007] The application discloses a magnetic pressure coupling refrigeration device, which comprises a water piston, a hot end heat exchanger, a cold end heat exchanger, a magnetic pressure regenerator, a first driving element and a second driving element. The water piston comprises a piston cylinder, a pear-shaped workpiece and two pistons arranged in the piston cylinder. The two pistons are symmetrically arranged on the two sides of the pear-shaped workpiece and abut against the pear-shaped workpiece. The left cavity of the water piston is connected with one end of the hot end heat exchanger and one end of the magnetic pressure regenerator through a first pipeline and a second pipeline respectively. The other end of the hot end heat exchanger is connected with one end of the magnetic pressure regenerator through a third pipeline. The right cavity of the water piston is connected with one end of the cold end heat exchanger and the other end of the magnetic pressure regenerator through a fourth pipeline and a fifth pipeline respectively. The other end of the cold end heat exchanger is connected with the other end of the magnetic pressure regenerator through a sixth pipeline. First, second, third and fourth electromagnetic valves are arranged on the first, second, fourth and fifth pipelines respectively. The magnetic pressure regenerator is sleeved with double-layer concentric Halbach magnets. The first driving element is connected with the pear-shaped workpiece and the inner concentric Halbach magnet and used for driving the pear-shaped workpiece to rotate around the rotation axis perpendicular to the piston cylinder and driving the inner concentric Halbach magnet to rotate around the magnetic pressure regenerator. The second driving element is connected with the pear-shaped workpiece and used for driving the pear-shaped workpiece to move horizontally along the piston cylinder. The magnetic pressure regenerator is filled with magnetic heat material or inverse magnetic heat material. The magnetic heat material or the inverse magnetic heat material has a pyroeffect. The cavity of the piston cylinder is filled with heat exchange fluid. If the magnetic pressure regenerator is filled with the magnetic heat material, in the initial state, the pear-shaped workpiece does not exert the maximum pressure on the piston and the concentric Halbach magnet is in a weak magnetic field. If the magnetic pressure regenerator is filled with the inverse magnetic heat material, in the initial state, the pear-shaped workpiece exerts the maximum pressure on the piston and the concentric Halbach magnet is in a weak magnetic field.

[0008] In one embodiment, a spring is arranged between each piston and the end of the piston cylinder.

[0009] In one embodiment, the piston is in a T shape and the spring is sleeved on the piston.

[0010] In one embodiment, an axle hole is arranged in the center of the pear-shaped workpiece. Slot holes extending along the axial direction of the piston cylinder are arranged on the front and back cylinder walls opposite to the axle hole. An axle is arranged in the axle hole. The axle is located in one of the slot holes. The output shaft of the first driving element is connected with the axle and the inner concentric Halbach magnet through a belt. The output shaft of the second driving element is connected with the pear-shaped workpiece through the other slot hole.

[0011] In one embodiment, a rack is arranged in the other slot hole. A gear is fixed on the output shaft of the second driving element. The gear is rotatably connected with the pear-shaped workpiece and matched with the rack.

[0012] In one embodiment, the first driving element and the second driving element are stepper motors.

[0013] In one embodiment, temperature sensors are provided at the connection points of the second, third, fifth, and sixth pipelines with the magnetic pressure regenerator.

[0014] In one embodiment, when the magnetic pressure regenerator is filled with magnetothermal material, the power is turned on, the second and third solenoid valves are closed, and the first and fourth solenoid valves are opened. The first driving component is controlled to work, driving the pear-shaped workpiece and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece applies maximum pressure to the piston, and the concentric Heilbeck magnet obtains a strong magnetic field, so that the magnetic pressure regenerator is in a state of strong magnetic field and strong hydrostatic pressure. The second driving component is controlled to drive the pear-shaped workpiece to move horizontally to the right, so that the heat exchange fluid exchanges heat through the hot end heat exchanger. Then, the first and fourth solenoid valves are closed, and the second and third solenoid valves are opened. The first driving component is controlled to continue working, driving the pear-shaped workpiece and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece applies minimum pressure to the piston, and the concentric Heilbeck magnet obtains a weak magnetic field, so that the magnetic pressure regenerator is in a state of weak magnetic field and low hydrostatic pressure. The second driving component is controlled to drive the pear-shaped workpiece to move horizontally to the left, so that the heat exchange fluid exchanges heat through the cold end heat exchanger to achieve cooling.

[0015] In one embodiment, when the magnetic pressure regenerator is filled with a reverse magnetothermal material, the power is turned on, the first and fourth solenoid valves are closed, and the second and third solenoid valves are opened. The first driving component is controlled to work, driving the pear-shaped workpiece and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece applies minimum pressure to the piston, and the concentric Heilbeck magnet obtains a strong magnetic field. After the magnetic pressure regenerator is in a state of strong magnetic field and low hydrostatic pressure, the second driving component is controlled to drive the pear-shaped workpiece to move horizontally to the left, so that the heat exchange fluid exchanges heat through the cold end heat exchanger to achieve cooling. Then, the second and third solenoid valves are closed, and the first and fourth solenoid valves are opened. The first driving component is controlled to continue working, driving the pear-shaped workpiece and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece applies maximum pressure to the piston, and the concentric Heilbeck magnet obtains a weak magnetic field. After the magnetic pressure regenerator is in a state of weak magnetic field and strong hydrostatic pressure, the second driving component is controlled to drive the pear-shaped workpiece to move horizontally to the right, so that the heat exchange fluid exchanges heat through the hot end heat exchanger.

[0016] The beneficial effects of this invention are: the magnetic pressure coupling refrigeration device of this invention solves the technical problems of existing refrigeration devices in related technologies, such as limited application scenarios, large device size, or low refrigeration efficiency, and achieves the following beneficial effects: compared with existing single-scenario magnetic refrigeration devices, the device of this invention combines magnetocaloric effect and pressure-thermal effect, and adopts a clever structural design to achieve magnetic pressure coupling refrigeration, reducing the size of the refrigeration device, improving the refrigeration efficiency, and making the refrigeration device have better refrigeration performance. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a magnetic coupling refrigeration device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the hydraulic piston of a magnetically coupled refrigeration device according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the hydraulic piston of a magnetically coupled refrigeration device according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the planar structure of the hydraulic piston of a magneto-pressure coupled refrigeration device according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the external structure of the hydraulic piston of a magneto-pressure coupled refrigeration device according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection between the pear-shaped workpiece and the concentric Hellbeck magnets in a magnetically coupled refrigeration device according to an embodiment of the present invention.

[0024] Among them, 1. Hydraulic piston, 11. Pear-shaped workpiece, 111. Shaft hole, 12. Piston, 13. Piston cylinder, 14. Spring, 131. Slot hole, 2. Hot end heat exchanger, 3. Cold end heat exchanger, 4. Magnetic pressure regenerator, 5. Second driving component, 6. First driving component, 7. Concentric Helbeck magnet, 8. Temperature sensor, 9. Belt, 10. Rotating shaft, 91. Rotating shaft, 21. First pipeline, 22. Second pipeline, 23. Third pipeline, 24. Fourth pipeline, 25. Fifth pipeline, 26. Sixth pipeline, 31. First solenoid valve, 32. Second solenoid valve, 33. Third solenoid valve, 34. Fourth solenoid valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] The following is for reference Figures 1-6 The magnetic coupling refrigeration device involved in the embodiments of the present invention will be described in detail.

[0028] It should be noted that the magnetocaloric effect refers to the temperature rise / fall during the excitation / demagnetization process, and cooling is achieved by using a magnetic field (the temperature falls during the excitation process, which is the inverse magnetocaloric effect). The pressure-thermal effect is related to hydrostatic pressure, and cooling is achieved by causing the temperature to rise / fall through the adiabatic pressurization / depressurization process. In some refrigerants, such as shape memory alloys (Ni-Mn based alloys), both magnetocaloric and piezoelectric effects can be simultaneously responded to. Mn-Co-Ge based alloys can simultaneously respond to both inverse magnetocaloric and piezoelectric effects. Magnetocaloric coupling can be divided into two categories: (I) applying hydrostatic pressure while excitation to achieve a combined response of magnetocaloric and piezoelectric effects; (II) applying hydrostatic pressure while demagnetization to achieve a combined response of inverse magnetocaloric and piezoelectric effects. For refrigeration applications of these materials, this invention presents a novel magnetocaloric coupling refrigeration device that can respond to materials with multiple magnetocaloric coupling methods. It can simultaneously achieve synchronization of multiple physical fields and recover the torque generated by the transition from strong to weak magnetism through timing control and mechanical coordination. The recovered torque is then applied to achieve hydrostatic pressure, thus realizing piezoelectric cooling.

[0029] like Figures 1-6As shown, the magnetic pressure coupling refrigeration device provided according to an embodiment of the present invention includes a hydraulic piston 1, a hot-end heat exchanger 2, a cold-end heat exchanger 3, a magnetic pressure regenerator 4, a first driving member 6, and a second driving member 5. The hydraulic piston 1 includes a piston cylinder 13, a pear-shaped workpiece 11 disposed in the piston cylinder 13, and two pistons 12. The two pistons 12 are symmetrical about both sides of the pear-shaped workpiece 11 and abut against the pear-shaped workpiece 11. The left side cavity of the hydraulic piston 1 is connected to the hot-end heat exchanger 2 through a first pipe 21 and a second pipe 22, respectively. One end of the hot end heat exchanger 2 is connected to one end of the magnetic pressure regenerator 4 via a third pipe 23; the right cavity of the hydraulic piston 1 is connected to one end of the cold end heat exchanger 3 and the other end of the magnetic pressure regenerator 4 via a fourth pipe 24 and a fifth pipe 25 respectively; the other end of the cold end heat exchanger 3 is connected to the other end of the magnetic pressure regenerator 4 via a sixth pipe 26; a first solenoid valve 31 is respectively installed on the first pipe 21, the second pipe 22, the fourth pipe 24 and the fifth pipe 25. The magnetic pressure regenerator 4 is equipped with a second solenoid valve 32, a third solenoid valve 33, and a fourth solenoid valve 34. A double-layered concentric Helbeck magnet 7 is fitted around the outer periphery of the magnetic pressure regenerator 4. A first drive unit 6 is connected to both the pear-shaped workpiece 11 and the inner concentric Helbeck magnet 7 to drive the pear-shaped workpiece 11 to rotate around the rotation axis 10 perpendicular to the piston cylinder 13 and to drive the inner concentric Helbeck magnet 7 to rotate around the magnetic pressure regenerator 4. A second drive unit 5 is connected to the pear-shaped workpiece 11 to drive the pear-shaped workpiece 11 along the piston cylinder 13. 3. Horizontal movement. The magnetic pressure regenerator 4 is filled with magnetothermal material or reverse magnetothermal material. Both magnetothermal material and reverse magnetothermal material have a compressive heat effect. The cavity of the piston cylinder 13 is filled with heat exchange fluid. If the magnetic pressure regenerator 4 is filled with magnetothermal material, in the initial state, the pear-shaped workpiece 11 does not apply maximum pressure to the piston, and the concentric Heilbeck magnet 7 is in a weak magnetic field. If the magnetic pressure regenerator 4 is filled with reverse magnetothermal material, in the initial state, the pear-shaped workpiece 11 applies maximum pressure to the piston, and the concentric Heilbeck magnet 7 is in a weak magnetic field.

[0030] Therefore, this invention solves the technical problems of existing refrigeration devices being limited to a single application scenario, or having a large size or low refrigeration efficiency, and achieves the following beneficial effects: Compared with existing single-scenario magnetic refrigeration devices, the device of this invention combines the magnetocaloric effect and the pressure-thermal effect, and adopts a clever structural design to achieve magnetic pressure coupling refrigeration, thereby reducing the size of the refrigeration device, improving the refrigeration efficiency, and giving the refrigeration device better refrigeration performance.

[0031] In Embodiment 1, when the magnetic pressure regenerator 4 is filled with magnetothermal material, initially, the pear-shaped workpiece 11 does not apply maximum pressure to the piston, and the concentric Heilbeck magnet 7 is in a weak magnetic field. When the refrigeration device is working, the power is turned on, controlling the second solenoid valve 32 and the third solenoid valve 33 to close, and the first solenoid valve 31 and the fourth solenoid valve 34 to open. This controls the first driving component 6 to work, causing the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece 11 applies maximum pressure to the piston 12, and the concentric Heilbeck magnet 7 obtains... A strong magnetic field is generated, placing the magnetic pressure regenerator 4 under strong magnetic field and strong hydrostatic pressure. The heat exchange fluid in the left cavity of the piston cylinder 13 is pre-cooled by the hot-end heat exchanger 2 before entering the magnetic pressure regenerator 4. The heat exchange fluid in the right cavity of the piston cylinder 13 directly enters the magnetic pressure regenerator 4. Under the strong hydrostatic pressure and strong magnetic field effect, the magnetic pressure regenerator 4 experiences a temperature increase due to magnetocaloric and thermo-pressure effects. Therefore, the increased temperature of the heat exchange fluid in the magnetic pressure regenerator 4 cools the regenerator 4. Then, the second driving element 5 is controlled to drive... The pear-shaped workpiece 11 moves horizontally to the right, causing the heat exchange fluid to be cooled and returned to its initial temperature through the hot-end heat exchanger 2 before re-entering the left cavity of the piston cylinder 13. Then, the first solenoid valve 31 and the fourth solenoid valve 34 are closed, and the second solenoid valve 32 and the third solenoid valve 33 are opened. The first drive unit 6 continues to work, driving the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece 11 applies minimum pressure to the piston, and the concentric Heilbeck magnet 7 obtains a weak magnetic field, so that the magnetic pressure regenerator 4 is in a weak magnetic field. Under low hydrostatic pressure, the heat exchange fluid in the left cavity of piston cylinder 13 directly enters the magnetic pressure regenerator 4, while the heat exchange fluid in the right cavity of piston cylinder 13, after being cooled by the cold-end heat exchanger 3, enters the magnetic pressure regenerator 4. Under the influence of a weak magnetic field and low hydrostatic pressure, the refrigerant temperature in the magnetic pressure regenerator 4 decreases. The heat exchange fluid exchanges heat with the magnetic pressure regenerator 4 to reach its lowest temperature. Then, the second driving component 5 drives the pear-shaped workpiece 11 to move horizontally to the left, allowing the heat exchange fluid to exchange heat through the cold-end heat exchanger 3 for further cooling, thus achieving refrigeration. Therefore, refrigeration is achieved using a refrigerant material that simultaneously responds to both magnetocaloric and compressive heat effects. In this embodiment, a magnetocaloric material is used (hydrostatic pressure is applied while the material is being energized to achieve a combined response of magnetocaloric and compressive heat effects).

[0032] In Embodiment 2, when the magnetic pressure regenerator 4 is filled with a reverse magnetothermal material, initially, the pear-shaped workpiece 11 applies maximum pressure to the piston 12, and the concentric Heilbeck magnet 7 is in a weak magnetic field. When the refrigeration device is working, the power is turned on, controlling the first solenoid valve 31 and the fourth solenoid valve 34 to close, and the second solenoid valve 32 and the third solenoid valve 33 to open. The first driving component 6 is controlled to work, driving the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece 11 applies minimum pressure to the piston 12, and the concentric Heilbeck magnet 7 obtains... A strong magnetic field causes the magnetic pressure regenerator 4 to operate under a strong magnetic field and low hydrostatic pressure. As a result, the heat exchange fluid in the right cavity of the piston cylinder 13 is pre-cooled by the cold-end heat exchanger 3 before entering the magnetic pressure regenerator 4. The heat exchange fluid in the left cavity of the piston cylinder 13 enters the magnetic pressure regenerator 4 directly. Under the effects of low hydrostatic pressure and a strong magnetic field, the magnetic pressure regenerator 4 experiences magnetocaloric and thermo-pressure effects, causing its temperature to decrease. Therefore, the temperature of the heat exchange fluid in the magnetic pressure regenerator 4 decreases to its lowest possible level. Then, the second driving component 5 is controlled to drive the pear-shaped workpiece 11 horizontally to the left. The motion causes the heat exchange fluid to exchange heat and cool down again through the cold-end heat exchanger 3, achieving refrigeration. Then, the second solenoid valve 32 and the third solenoid valve 33 are closed, and the first solenoid valve 31 and the fourth solenoid valve 34 are opened. The first driving component 6 continues to work, driving the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously. The pear-shaped workpiece 11 applies maximum pressure to the piston, and the concentric Heilbeck magnet 7 obtains a weak magnetic field, so that the magnetic pressure regenerator 4 is in a state of weak magnetic field and strong hydrostatic pressure. The heat exchange fluid in the left cavity of the piston cylinder 13 first passes through the hot end. After pre-cooling in heat exchanger 2, the fluid enters the magnetic pressure regenerator 4. The heat exchange fluid in the right cavity of piston cylinder 13 directly enters the magnetic pressure regenerator 4. Under strong hydrostatic pressure and weak magnetic field effects, the magnetic pressure regenerator 4 experiences magnetocaloric and thermo-pressure effects, causing its temperature to rise. Therefore, the temperature of the heat exchange fluid in the magnetic pressure regenerator 4 rises, allowing the magnetic pressure regenerator 4 to cool down. Then, the second driving component 5 drives the pear-shaped workpiece 11 to move horizontally to the right, causing the heat exchange fluid to pass through the hot-end heat exchanger 2 for heat exchange and cooling, returning to its initial temperature before re-entering the left cavity of piston cylinder 13. Thus, refrigeration is achieved using a refrigerant material that simultaneously responds to magnetocaloric and thermo-pressure effects. In this embodiment, it is a reverse magnetocaloric material (applying hydrostatic pressure while demagnetizing to achieve a combined response of reverse magnetocaloric and thermo-pressure effects).

[0033] It should be noted that the hot-end heat exchanger 2 is used to pre-cool the heat exchange fluid, and the cold-end heat exchanger 3 is used to refrigerate the heat exchange fluid. In this embodiment, the initial temperature of the heat exchange fluid in the magnetic pressure coupling refrigeration device is determined by the set temperature of the hot-end heat exchanger 2, such as the liquid nitrogen temperature. The hot-end heat exchanger 2 can pre-cool the heat exchange fluid in the refrigeration device, ensuring that the initial temperature is near the liquid nitrogen temperature. A small cryogenic refrigerator can be selected to maintain the temperature of the hot-end heat exchanger, such as a Stirling refrigerator or a GM refrigerator.

[0034] Furthermore, such asFigures 2-5 As shown, a spring 14 is provided between each piston and the end of the piston cylinder 13. The piston is T-shaped, and the spring 14 is sleeved on the piston. This facilitates the automatic reset of the piston 12.

[0035] Furthermore, such as Figures 2-5 As shown, the pear-shaped workpiece 11 has a shaft hole 111 at its center. The piston cylinder 13 has slots 131 extending axially along its middle section on the front and rear walls opposite the shaft hole 111. A rotating shaft 10 is fitted into the shaft hole 111, and the rotating shaft 10 is located in one of the slots 131. The output shaft of the first drive unit 6 is simultaneously connected to the rotating shaft 10 and the concentric Helbeck magnet 7 of the inner layer via a belt 9. The output shaft of the second drive unit 5 is connected to the pear-shaped workpiece 11 via the other slot 131. Figure 5 As shown, the inner magnetic assembly of the concentric Hellbeck magnet 7 also has a rotating shaft 91. A belt 9 connects the rotating shaft 10 of the pear-shaped workpiece 11 to the rotating shaft 91 on the inner magnetic assembly of the concentric Hellbeck magnet 7. The output shaft of the drive unit is connected to the belt 9. This achieves synchronous driving of the rotation of the pear-shaped workpiece 11 and the rotation of the inner magnetic assembly of the concentric Hellbeck magnet 7.

[0036] Furthermore, a rack is provided in another slot 131, and a gear is fixed on the output shaft of the second drive member 5. The gear is rotatably connected to the pear-shaped workpiece 11 and engages with the rack. This enables the second drive member 5 to drive the pear-shaped workpiece 11 in the horizontal direction.

[0037] Furthermore, the first driving component 6 and the second driving component 5 are stepper motors, which facilitates control by the control system.

[0038] Furthermore, such as Figure 1 As shown, temperature sensors 8 are provided at the connection points of the second pipe 22, the third pipe 23, the fifth pipe 25 and the sixth pipe 26 with the magnetic pressure regenerator 4, so as to detect the temperature of the heat exchange fluid on each pipe.

[0039] Specifically, in Embodiment 1, the refrigerant filled in the magnetic pressure regenerator 4 is a magnetocaloric material. Initially, the pear-shaped workpiece 11 does not apply maximum pressure to the piston 12, and the concentric Helbeck magnet 7 is in a weak magnetic field. The piston cylinder 13 cavity and all pipes are filled with heat exchange fluid, which acts as both a pressure transmission medium and a heat exchange fluid. When the refrigeration device is working, the power is turned on, controlling the second solenoid valve 32 and the third solenoid valve 33 to close, and the first solenoid valve 31 and the fourth solenoid valve 34 to open. Then, the first drive unit 6 (stepper motor) is controlled to start operating one step, thereby driving the pear-shaped workpiece 11 and the inner Helbeck magnet to rotate synchronously, so that the outermost contour of the pear-shaped workpiece 11 abuts against the piston, applying maximum pressure to the piston. The concentric Helbeck magnet 7 obtains a strong magnetic field, causing the magnetic pressure regenerator 4 to be in a state of strong magnetic field and strong hydrostatic pressure. Thus, the heat exchange fluid in the left cavity of the piston cylinder 13 first passes through the hot-end heat exchanger 2. After precooling, the fluid enters the magnetic pressure regenerator 4. The heat exchange fluid in the right cavity of the piston cylinder 13 directly enters the magnetic pressure regenerator 4. Under the strong hydrostatic pressure and strong magnetic field effect, the magnetic pressure regenerator 4 experiences magnetocaloric and thermo-pressure effects, causing its temperature to rise. Therefore, the temperature of the heat exchange fluid in the magnetic pressure regenerator 4 increases from T0 to T1, thus cooling the magnetic pressure regenerator 4. Then, the second driving component 5 (stepper motor) is controlled to move one step, driving the pear-shaped workpiece 11 to move horizontally to the right a certain distance, which in turn moves the entire piston to the right a certain distance, allowing the heat exchange fluid to exchange heat and cool through the hot-end heat exchanger 2. However, after returning to the initial temperature, it re-enters the left cavity of piston cylinder 13; then, the first solenoid valve 31 and the fourth solenoid valve 34 are closed, and the second solenoid valve 32 and the third solenoid valve 33 are opened, controlling the first drive unit 6 (stepper motor) to continue operating for one step, driving the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously, so that the minimum contour periphery of the pear-shaped workpiece 11 abuts against the piston to apply minimum pressure to the piston, and the concentric Heilbeck magnet 7 obtains a weak magnetic field, so that the magnetic pressure regenerator 4 is in a state of weak magnetic field and low hydrostatic pressure, and the heat exchange fluid in the left cavity of piston cylinder 13 directly enters The heat exchange fluid in the right cavity of the piston cylinder 13 enters the magnetic pressure regenerator 4 after being cooled by the cold end heat exchanger 3. After being subjected to a weak magnetic field and low hydrostatic pressure, the temperature of the refrigerant in the magnetic pressure regenerator 4 decreases. After the heat exchange fluid exchanges heat with the magnetic pressure regenerator 4, the temperature drops from T0 to T2 to obtain the lowest temperature. Then, the second driving component 5 (stepper motor) is controlled to rotate in the opposite direction by one step to drive the pear-shaped workpiece 11 to move horizontally to the left by a certain distance, thereby driving the entire piston to move to the left by a certain distance, so that the heat exchange fluid exchanges heat through the cold end heat exchanger 3 to further cool down and achieve refrigeration.

[0040] Specifically, in Embodiment 2, the refrigerant filled in the magnetic pressure regenerator 4 is a reverse magnetocaloric material. In the initial state, the pear-shaped workpiece 11 applies maximum pressure to the piston, and the concentric Heilbeck magnet 7 is in a weak magnetic field. The piston cylinder 13 cavity and all pipes are filled with heat exchange fluid, which serves as both a pressure transmission medium and a heat exchange fluid. When the refrigeration unit is working, the power is turned on, controlling the first solenoid valve 31 and the fourth solenoid valve 34 to close, and the second solenoid valve 32 and the third solenoid valve 33 to open. This controls the first drive unit 6 (stepper motor) to start operating one step, thereby driving the pear-shaped workpiece 11 and the inner Heilbeck magnet to rotate synchronously. The outermost contour of the pear-shaped workpiece 11 abuts against the piston, applying minimum pressure to the piston. The concentric Heilbeck magnet 7 obtains a strong magnetic field, causing the magnetic pressure regenerator 4 to be in a state of strong magnetic field and low hydrostatic pressure. Thus, the heat exchange fluid in the right cavity of the piston cylinder 13 is pre-cooled by the cold-end heat exchanger 3 before entering the magnetic pressure regenerator 4. The heat exchange fluid in the left cavity of the piston cylinder 13 directly enters the magnetic pressure regenerator 4. Under the effects of low hydrostatic pressure and a strong magnetic field, the magnetic pressure regenerator 4 experiences magnetocaloric and thermo-pressure effects, causing its temperature to decrease. Therefore, the temperature of the heat exchange fluid in the magnetic pressure regenerator 4 decreases from T0 to T3, reaching its lowest temperature. Here, as... Figure 6 As shown, the pear-shaped workpiece 11, connected to the Hellbeck magnet assembly via a conveyor belt, experiences a torque generated during hydrostatic pressure unloading, which acts on the excitation of the Hellbeck magnet, reducing the load on the first drive motor. Next, the second drive unit 5 (stepper motor) is controlled to move one step, driving the pear-shaped workpiece 11 horizontally a certain distance to the left, causing the entire piston to move a certain distance to the left. This allows the heat exchange fluid to exchange heat through the cold-end heat exchanger 3 and cool down again, achieving refrigeration. Then, the second solenoid valve 32 and the third solenoid valve 33 are closed, while the first solenoid valve 31 and the fourth solenoid valve 34 are opened. The first drive unit 6 (stepper motor) continues to move one step, causing the pear-shaped workpiece 11 and the inner Hellbeck magnet to rotate synchronously. This causes the outermost contour of the pear-shaped workpiece 11 to abut against the piston, applying maximum pressure. The concentric Hellbeck magnet 7 receives a weak magnetic field, placing the magnetic pressure regenerator 4 in a state of weak magnetic field and strong hydrostatic pressure. The heat exchange fluid in the left cavity of piston cylinder 13 is pre-cooled by the hot end heat exchanger 2 before entering the magnetic pressure regenerator 4. The heat exchange fluid in the right cavity of piston cylinder 13 directly enters the magnetic pressure regenerator 4. Under the strong hydrostatic pressure and weak magnetic field effect, the magnetic pressure regenerator 4 is subjected to magnetothermal effect and thermo-pressure effect, and its temperature rises. Therefore, the temperature of the heat exchange fluid in the magnetic pressure regenerator 4 rises from T0 to T4 to cool the magnetic pressure regenerator 4. Then, the second driving component 5 (electric drive) is controlled to reverse one step to drive the pear-shaped workpiece 11 to move horizontally to the right a certain distance, which drives the entire piston to move to the right a certain distance, so that the heat exchange fluid is cooled by heat exchange through the hot end heat exchanger 2 and returns to the initial temperature before entering the left cavity of piston cylinder 13 again.

[0041] Therefore, the magnetic pressure coupling refrigeration device provided by the present invention solves the technical problems of existing refrigeration devices in related technologies, such as limited application scenarios, large device size, or low refrigeration efficiency, and achieves the following beneficial effects: Compared with existing single-scenario magnetic refrigeration devices, the device of the present invention combines magnetocaloric effect and pressure-thermal effect, and adopts a clever structural design to achieve magnetic pressure coupling refrigeration, thereby reducing the size of the refrigeration device, improving the refrigeration efficiency, and giving the refrigeration device better refrigeration performance.

[0042] In the description of this invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetic compression coupling refrigeration device, characterized in that, The device comprises a water piston, a hot end heat exchanger, a cold end heat exchanger, a magnetic pressure regenerator, a first driving member and a second driving member, the water piston comprises a piston cylinder, a pear-shaped workpiece and two pistons arranged in the piston cylinder, the two pistons are in abutment with the pear-shaped workpiece symmetrically on both sides of the pear-shaped workpiece, a left cavity of the water piston is communicated with one end of the hot end heat exchanger and one end of the magnetic pressure regenerator through a first pipeline and a second pipeline respectively, the other end of the hot end heat exchanger is communicated with one end of the magnetic pressure regenerator through a third pipeline, a right cavity of the water piston is communicated with one end of the cold end heat exchanger and the other end of the magnetic pressure regenerator through a fourth pipeline and a fifth pipeline respectively, the other end of the cold end heat exchanger is communicated with the other end of the magnetic pressure regenerator through a sixth pipeline, the first pipeline, the second pipeline, the fourth pipeline and the fifth pipeline are respectively provided with a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, the magnetic pressure regenerator is sleeved with double-layer concentric Halbach magnets, the first driving member is connected to the pear-shaped workpiece and the inner concentric Halbach magnet for driving the pear-shaped workpiece to rotate around the rotation axis perpendicular to the piston cylinder and driving the inner concentric Halbach magnet to rotate around the magnetic pressure regenerator, the second driving member is connected to the pear-shaped workpiece for driving the pear-shaped workpiece to move horizontally along the piston cylinder, the magnetic pressure regenerator is filled with a magnetic heat material or a reverse magnetic heat material, the magnetic heat material or the reverse magnetic heat material has a pyromagnetic effect, and the cavity of the piston cylinder is filled with a heat exchange fluid; if the magnetic pressure regenerator is filled with the magnetic heat material, in the initial state, the pear-shaped workpiece does not exert the maximum pressure on the piston and the concentric Halbach magnet is in a weak magnetic field; if the magnetic pressure regenerator is filled with the reverse magnetic heat material, in the initial state, the pear-shaped workpiece exerts the maximum pressure on the piston and the concentric Halbach magnet is in a weak magnetic field.

2. The magnetic pressure coupling refrigeration device according to claim 1, characterized in that, A spring is arranged between each of the pistons and the end of the piston cylinder.

3. The magnetic pressure coupling refrigeration device according to claim 2, characterized in that, The piston is in a T shape, and the spring is sleeved on the piston.

4. The magnetic pressure coupling refrigeration device of claim 1, wherein, The pear-shaped workpiece is provided with an axle hole, the front and rear cylinder walls of the piston cylinder opposite to the axle hole are provided with slot holes extending along the axial direction of the piston cylinder, an axle is arranged in the axle hole, the axle is located in one of the slot holes, the output shaft of the first driving member is connected to the axle and the inner concentric Halbach magnet through a belt, and the output shaft of the second driving member is connected to the pear-shaped workpiece through the other slot hole.

5. The magnetic pressure coupling refrigeration device according to claim 4, characterized in that, A gear is fixed on the output shaft of the second driving member, and the gear is rotatably connected to the pear-shaped workpiece and matched with the rack.

6. The magnetic pressure coupling refrigeration device according to claim 5, characterized in that, The first driving member and the second driving member are step motors.

7. The magnetic pressure coupling refrigeration device of claim 1, wherein, Temperature sensors are arranged at the connection positions of the second pipeline, the third pipeline, the fifth pipeline and the sixth pipeline and the magnetic pressure regenerator.

8. The magnetic pressure coupling refrigeration device according to any one of claims 1-7, characterized in that, When the magnetic pressure regenerator is filled with magnetic heat material, the power supply is started, the second electromagnetic valve and the third electromagnetic valve are controlled to be closed, the first electromagnetic valve and the fourth electromagnetic valve are controlled to be opened, the first driving part is controlled to work to drive the pear-shaped workpiece and the Halbach magnet inside to rotate synchronously, the pear-shaped workpiece applies the maximum pressure to the piston, the concentric Halbach magnet obtains a strong magnetic field, so that the magnetic pressure regenerator is in a strong magnetic field and strong hydrostatic pressure state, and the second driving part is controlled to drive the pear-shaped workpiece to move horizontally to the right so that the heat exchange fluid is heat-exchanged through the hot-end heat exchanger; then, the first electromagnetic valve and the fourth electromagnetic valve are controlled to be closed, the second electromagnetic valve and the third electromagnetic valve are controlled to be opened, the first driving part is controlled to continue to work to drive the pear-shaped workpiece and the Halbach magnet inside to rotate synchronously, the pear-shaped workpiece applies the minimum pressure to the piston, the concentric Halbach magnet obtains a weak magnetic field, so that the magnetic pressure regenerator is in a weak magnetic field and low hydrostatic pressure state, and then the second driving part is controlled to drive the pear-shaped workpiece to move horizontally to the left so that the heat exchange fluid is heat-exchanged through the cold-end heat exchanger to realize refrigeration.

9. The magnetic pressure coupling refrigeration device according to any one of claims 1-7, characterized in that, When the magnetic pressure regenerator is filled with inverse magnetic heat material, the power supply is started, the first electromagnetic valve and the fourth electromagnetic valve are controlled to be closed, the second electromagnetic valve and the third electromagnetic valve are controlled to be opened, the first driving part is controlled to work to drive the pear-shaped workpiece and the Halbach magnet inside to rotate synchronously, the pear-shaped workpiece applies the minimum pressure to the piston, the concentric Halbach magnet obtains a strong magnetic field, so that the magnetic pressure regenerator is in a strong magnetic field and low hydrostatic pressure state, and then the second driving part is controlled to drive the pear-shaped workpiece to move horizontally to the left so that the heat exchange fluid is heat-exchanged through the cold-end heat exchanger to realize refrigeration; then, the second electromagnetic valve and the third electromagnetic valve are controlled to be closed, the first electromagnetic valve and the fourth electromagnetic valve are controlled to be opened, the first driving part is controlled to continue to work to drive the pear-shaped workpiece and the Halbach magnet inside to rotate synchronously, the pear-shaped workpiece applies the maximum pressure to the piston, the concentric Halbach magnet obtains a weak magnetic field, so that the magnetic pressure regenerator is in a weak magnetic field and strong hydrostatic pressure state, and then the second driving part is controlled to drive the pear-shaped workpiece to move horizontally to the right so that the heat exchange fluid is heat-exchanged through the hot-end heat exchanger.

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