A refrigeration device and a refrigeration cycle system coupling magnetic refrigeration and electrocaloric refrigeration

Abstract

The present invention relates to a refrigeration device and a refrigeration cycle system coupling magnetic refrigeration and electrocaloric refrigeration, which includes a magnetic refrigeration bed filled with a magnetic working fluid, an electromagnetic coil, an electrocaloric refrigeration component, a temperature sensor, a first power supply, a second power supply, and a controller. The electromagnetic coil is arranged on the outer periphery of the magnetic refrigeration bed; there is a gap between the magnetic working fluids inside the magnetic refrigeration bed, and the temperature sensor is arranged in the gap to detect the temperature of the magnetic working fluid. The electrocaloric refrigeration component is arranged inside the magnetic refrigeration bed; the electromagnetic coil is connected to the first power supply so that the electromagnetic coil generates an alternating magnetic field; the electrocaloric refrigeration component is electrically connected to the second power supply; the controller is respectively electrically connected to the temperature sensor and the second power supply. The refrigeration device utilizes the mutual coupling of the electrocaloric effect and the magnetocaloric effect to regulate the temperature of the magnetic working fluid, making the temperature of the magnetic working fluid close to its Curie temperature, giving full play to the magnetocaloric effect, so as to achieve an ideal refrigeration effect; the refrigeration cycle system utilizes the cold quantity generated by the refrigeration device to achieve rapid refrigeration.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and more specifically, to a refrigeration device and a refrigeration cycle system that couple magnetic refrigeration and electrocaloric refrigeration. Background Art

[0002] Refrigeration is an essential thing in people's daily life. From the preservation of fruits, vegetables, and meats to the use of air conditioners, and then to the organ refrigeration and nuclear magnetic resonance imaging in the medical field, refrigeration is required. Today, the steam compression refrigeration technology with a history of over a hundred years still dominates the market share in the fields of refrigeration, air conditioning, and thermal management. However, the gas refrigerants used in gas compression refrigeration can damage the atmospheric ozone layer and cause the greenhouse effect. The direct emission of strong greenhouse gases threatens the ecological environment on which humans depend for survival. Therefore, the development of low-carbon technologies and high-efficiency technological innovations is a manifestation of human self-restraint. Exploring pollution-free and environmentally friendly refrigeration materials and developing new refrigeration technologies with low energy consumption and high efficiency have become an urgent task.

[0003] Room-temperature magnetic refrigeration technology is a new type of environmentally friendly refrigeration technology, and its working principle is based on the magnetocaloric effect. The magnetocaloric effect is an inherent property of magnetic materials. When a magnetic field is applied to a magnetic material, the magnetic moments of atoms are aligned neatly along the external magnetic field, making the magnetic moments ordered, strengthening the magnetic order degree of the system, thereby reducing the magnetic entropy of the material, and thus releasing heat to the outside world. When the magnetic field is removed, the directions of the magnetic moments become disordered, the magnetic order degree inside the material decreases, the magnetic entropy increases, and thus the magnetic material absorbs heat from the outside world. Through heat exchange, the temperature of the surrounding environment is reduced, thereby achieving the purpose of refrigeration.

[0004] The magnetocaloric effect of magnetic materials is the largest when they are close to their Curie temperatures. Generally speaking, during the heat absorption and heat release processes of magnetic materials, there will be a certain gradient change in the temperature of the magnetic materials, that is, the temperature of some magnetic materials will deviate from the Curie temperature point, and the magnetocaloric effect cannot be fully utilized, and the refrigeration efficiency cannot reach the ideal effect. Summary of the Invention

[0005] In order to overcome the technical problem that during the heat absorption and heat release processes of magnetic materials in the above-mentioned prior art, there will be a certain gradient change in the temperature of the magnetic materials, that is, the temperature of some magnetic materials will deviate from the Curie temperature point, the magnetocaloric effect cannot be fully utilized, and the refrigeration efficiency cannot reach the ideal effect, the present invention provides a refrigeration device and a refrigeration cycle system that couple magnetic refrigeration and electrocaloric refrigeration.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration, including a magnetic refrigeration bed filled with a magnetic working medium, an electromagnetic coil, an electrocaloric refrigeration component, a temperature sensor, a first power supply, a second power supply, and a controller. The electromagnetic coil is arranged on the outer periphery of the magnetic refrigeration bed. There is a gap between the magnetic working media inside the magnetic refrigeration bed. The temperature sensor is arranged in the gap to detect the temperature of the magnetic working medium. The electrocaloric refrigeration component is arranged inside the magnetic refrigeration bed. The electromagnetic coil is connected to the first power supply so that the electromagnetic coil generates an alternating magnetic field. The electrocaloric refrigeration component is electrically connected to the second power supply. The controller is electrically connected to the temperature sensor and the second power supply respectively.

[0007] In this technical solution, the first power supply is an alternating current. During use, a heat exchange fluid is introduced into the gap between the magnetic working media. Since the first power supply is an alternating current, the electromagnetic coil will generate an alternating magnetic field after being energized, thereby realizing the magnetization and demagnetization process of the magnetic refrigeration bed. Since the heat exchange fluid can flow in the gap between the magnetic working media, when the magnetic working medium is magnetized and releases heat, the heat exchange fluid can transfer the heat generated by the magnetic working medium to the hot end for heat exchange. When the magnetic working medium is demagnetized and absorbs heat, the heat exchange fluid can transfer the cold generated by the magnetic working medium to the refrigeration end. At the same time, the temperature sensor can detect the temperature of the magnetic working medium and transmit the temperature value to the controller. The controller controls whether the second power supply applies an electric field to the electrocaloric refrigeration component according to the temperature value. When the electrocaloric refrigeration component is applied with an electric field, the temperature will rise, and the heat exchange fluid will take away the released heat. When the electric field is removed, the temperature of the electrocaloric material unit decreases, and it absorbs the heat of the magnetic working medium, reducing the temperature of the magnetic working medium closer to its own Curie temperature, thereby completing the electrocaloric refrigeration cycle. This technical solution uses the mutual coupling of the electrocaloric effect and the magnetocaloric effect to regulate the temperature of the magnetic working medium, making the temperature of the magnetic working medium close to its Curie temperature, giving full play to the magnetocaloric effect, and thus achieving an ideal refrigeration effect.

[0008] Preferably, the electrocaloric refrigeration component includes an electrocaloric material unit, an electrode layer, and an insulating layer. The electrode layer is arranged on the outer layer of the electrocaloric material unit, and the insulating layer is tightly coated on the outer periphery of the electrode layer. The electrode layer is electrically connected to the second power supply.

[0009] Preferably, the magnetic refrigeration bed is filled with multiple magnetic working media with different Curie temperatures. The multiple magnetic working media are arranged and filled according to the temperature gradient direction of the magnetic refrigeration bed, so that the temperature gradient of the magnetic refrigeration bed is consistent with the Curie temperature gradient direction of the magnetic working media.

[0010] Preferably, the refrigeration device further includes an iron core layer for enhancing the magnetic field of the electromagnetic coil. The iron core layer is disposed between the outer sidewall of the magnetic refrigeration bed and the electromagnetic coil, and the electromagnetic coil is wound around the outer sidewall of the iron core layer.

[0011] Preferably, the refrigeration device further includes an induction coil layer and a rectifying circuit. The second power source is a storage battery. The induction coil layer is disposed between the outer sidewall of the magnetic refrigeration bed and the iron core layer, and the inner wall of the induction coil layer is in rolling contact with the outer wall of the magnetic refrigeration bed, and the outer wall of the induction coil is in rolling contact with the inner wall of the iron core layer. The induction coil layer is electrically connected to the storage battery to recover the generated electric energy; the storage battery is connected to the electrocaloric refrigeration component through the rectifying circuit.

[0012] Preferably, the induction coil layer includes an inner layer, an outer layer and an induction coil. Hook-shaped structures are uniformly arranged circumferentially between the inner layer and the outer layer, and the induction coil is wound on the hook-shaped structures. The inner sidewall of the inner layer is in rolling contact with the outer sidewall of the magnetic refrigeration bed, and the outer sidewall of the outer layer is in rolling contact with the inner sidewall of the iron core layer.

[0013] Preferably, a blower and a flywheel energy storage device are further included. The flywheel energy storage device and the blower are mechanically connected to store the mechanical energy generated by the blower; the flywheel shaft of the flywheel energy storage device is connected to the inner layer to drive the inner layer to rotate.

[0014] On the other hand, a refrigeration cycle system is further provided. The refrigeration cycle system includes the refrigeration device, a first piston pump, a first heat exchanger and a first constant-temperature cold storage as described in any one of the above. The first piston pump includes a first cavity, a first piston and a second cavity. The first piston is disposed between the first cavity and the second cavity and reciprocates between the first cavity and the second cavity; one end of the magnetic refrigeration bed of the refrigeration device is communicated with one end of the first heat exchanger, the other end of the first heat exchanger is communicated with the first cavity, the second cavity is communicated with one end of the first constant-temperature cold storage, and the first constant-temperature cold storage is communicated with the other end of the magnetic refrigeration bed of the refrigeration device.

[0015] In this technical solution, the first power supply is sinusoidal alternating current. After the electromagnetic coil is energized, a magnetic field is generated. During the process of the magnetic field gradually increasing to the maximum value, the refrigeration device is magnetized; at this time, the refrigeration device is in the magnetizing hot-blowing stage, driving the first piston to move to the right, pumping the heat exchange fluid into the first constant-temperature cold storage, and the heat exchange fluid enters the magnetic refrigeration bed through the first constant-temperature cold storage, that is, flows into the gap between the magnetic working media, exchanges heat with the magnetic working media in the heat-releasing state and the temperature rises, and after flowing into the first heat exchanger for heat exchange, finally flows back to the first piston pump; the three-phase alternating current continues to change and gradually decreases, and the generated magnetic field also gradually decreases from the maximum value to 0. During this process, the refrigeration device is in the demagnetizing cold-blowing stage, driving the first piston in the first piston pump to move to the left, the heat exchange fluid flows out of the first piston pump, enters the magnetic refrigeration bed through the first heat exchanger, exchanges heat with the magnetic working media in the heat-absorbing state and the temperature decreases, then flows into the first constant-temperature cold storage and exchanges heat with it, enabling the first constant-temperature cold storage to accumulate cold energy, and the heat exchange fluid after heat exchange finally flows back to the first piston pump. After the first constant-temperature cold storage reaches the target temperature, that is, after accumulating enough cold energy, it can quickly refrigerate the environment.

[0016] Preferably, the refrigeration cycle system further includes a first three-way valve, a first stop valve, and a second heat exchanger. The first three-way valve has one inlet and two outlets. The inlet is communicated with the first constant-temperature cold storage. One of the outlets is communicated with the magnetic refrigeration bed of the refrigeration device, and the other outlet is communicated with one end of the second heat exchanger; one end of the first stop valve is communicated with the second cavity, and the other end is communicated with the other end of the second heat exchanger.

[0017] Preferably, it includes at least two refrigeration devices, a second constant-temperature cold storage, and a second piston pump. One end of the magnetic refrigeration bed of another refrigeration device is communicated with the first constant-temperature cold storage, and the other end is communicated with the second constant-temperature cold storage; the second piston pump has a third cavity, a second piston, and a fourth cavity. The second piston is arranged between the third cavity and the fourth cavity and makes a reciprocating motion; the third cavity is communicated with the first constant-temperature cold storage, and the fourth cavity is communicated with the second constant-temperature cold storage.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The refrigeration device of the present invention utilizes the mutual coupling of the electrocaloric effect and the magnetocaloric effect to regulate the temperature of the magnetic working media, making the temperature of the magnetic working media close to its Curie temperature, giving full play to the magnetocaloric effect, and thus achieving an ideal refrigeration effect.

[0020] 2. In the refrigeration cycle system of the present invention, the first piston pump, the first constant-temperature cold storage, the refrigeration device, and the first heat exchanger are connected to form a loop. The first piston pump drives the heat exchange fluid to circulate reciprocally in this loop, carrying the heat generated by the refrigeration device to the first heat exchanger for heat exchange, and carrying the cold generated by the refrigeration device to the first constant-temperature cold storage for storage. After the first constant-temperature cold storage reaches the target temperature, that is, after accumulating enough cold, it can quickly refrigerate the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a sectional structure diagram of the refrigeration device for coupling magnetic refrigeration and electrocaloric refrigeration of the present invention;

[0022] Figure 2 is a cross-sectional structure diagram of the refrigeration device for coupling magnetic refrigeration and electrocaloric refrigeration of the present invention;

[0023] Figure 3 is a structure diagram of the electrocaloric refrigeration component in the refrigeration device for coupling magnetic refrigeration and electrocaloric refrigeration of the present invention;

[0024] Figure 4 is a structure diagram of the connection between the electrocaloric refrigeration component and the second power supply in the refrigeration device for coupling magnetic refrigeration and electrocaloric refrigeration of the present invention;

[0025] Figure 5 is a structure diagram of the connection between the refrigeration device for coupling magnetic refrigeration and electrocaloric refrigeration of the present invention and the first power supply and the second power supply;

[0026] Figure 6 is the overall structure diagram of the refrigeration cycle system of the present invention.

[0027] In the drawings: 1. Magnetic refrigeration bed; 2. Electromagnetic coil; 3. Electrocaloric refrigeration component; 31. Electrocaloric material unit; 32. Electrode layer; 33. Insulating layer; 4. Temperature sensor; 5. First power supply; 6. Second power supply; 7. Iron core layer; 8. Induction coil layer; 81. Inner layer; 82. Outer layer; 83. Induction coil; 84. Hook-shaped structure; 85. Connection part; 9. Rectifier circuit;

[0028] 101, First piston pump; 11, First cavity; 12, First piston; 13, Second cavity; 102, Second piston; 14, Third cavity; 15, Second piston; 16, Fourth cavity; 103, Third piston pump; 17, Fifth cavity; 18, Third piston; 19, Sixth cavity; 111, First heat exchanger; 112, Second heat exchanger; 113, Third heat exchanger; 114, Fourth heat exchanger; 121, First constant temperature cold storage; 122, Second constant temperature cold storage; 123, Third constant temperature cold storage; 131, First three-way valve; 132, Second three-way valve; 133, Third three-way valve; 141, First stop valve; 142, Second stop valve; 143, Third stop valve; 151, Flywheel energy storage device; 152, Fan; 153, First pipeline; 161, First refrigeration device; 162, Second refrigeration device; 163, Third refrigeration device. Detailed implementation manners

[0029] The accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustrating this embodiment, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. The positional relationships described in the accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent.

[0030] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The technical solutions of the present invention will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings:

[0032] Embodiment 1

[0033] As Figure 1 , Figure 2 and Figure 5As shown, a refrigeration device that couples magnetic refrigeration and electric card refrigeration includes a magnetic refrigeration bed 1 filled with magnetic working fluid, an electromagnetic coil 2, an electric card refrigeration component 3, a temperature sensor 4, a first power supply 5, a second power supply 6 and a controller, wherein the electromagnetic coil is arranged on the outer periphery of the magnetic refrigeration bed 1; there is a gap between the magnetic working fluids inside the magnetic refrigeration bed 1, the temperature sensor 4 is arranged in the gap to detect the temperature of the magnetic working fluid, and the electric card refrigeration component 3 is arranged inside the magnetic refrigeration bed 1; the electromagnetic coil 2 is connected to the first power supply 5 so that the electromagnetic coil 2 generates an alternating magnetic field; the electric card refrigeration component 3 is electrically connected to the second power supply 6; and the controller is electrically connected to the temperature sensor 4 and the second power supply 6 respectively.

[0034] In this embodiment, the first power source 5 is alternating current; during use, a heat exchange fluid is introduced into the gap between the magnetic working fluids; since the first power source 5 is alternating current, an alternating magnetic field will be generated after the electromagnetic coil 2 is energized, thereby realizing the excitation and demagnetization process of the magnetic refrigeration bed 1. Since the heat exchange fluid can flow in the gap between the magnetic working fluids, when the magnetic working fluid is magnetized and releases heat, the heat exchange fluid can transfer the heat generated by the magnetic working fluid to the heat exchange end for heat exchange; when the magnetic working fluid is demagnetized and absorbs heat, the heat exchange fluid can transfer the cold generated by the magnetic working fluid to the refrigeration end for refrigeration or storage; at the same time, the temperature sensor 4 can detect the temperature of the magnetic working fluid and transmit the temperature value to the controller, and the controller controls the second power source 6 whether to apply an electric field to the electric card refrigeration component 3 according to the temperature value; if the electric card refrigeration component 3 applies an electric field, the temperature will rise, and the heat exchange fluid will take away the released heat. If the electric field is removed, the temperature of the electric card material unit 31 will decrease, and it will absorb the heat of the magnetic working fluid, reduce the temperature of the magnetic working fluid to be closer to its own Curie temperature, and then complete the electric card refrigeration cycle. This embodiment utilizes the mutual coupling of the electrocaloric effect and the magnetocaloric effect to regulate the temperature of the magnetic working fluid, so that the temperature of the magnetic working fluid is close to its Curie temperature, giving full play to the magnetocaloric effect, and thus achieving an ideal cooling effect. It should be noted that the first power source 5 is a sinusoidal alternating current; the magnetic working fluid material can be Gd5Si2Ge2, Gd0.5Dy0.5, La0.9K0.1MnO3, La(Fe,Si)13, etc.

[0035] like Figure 3 and Figure 4As shown, the electric card refrigeration component 3 includes an electric card material unit 31, an electrode layer 32 and an insulating layer 33. The electrode layer 32 is arranged on the outer layer 82 of the electric card material unit 31, and the insulating layer 33 is tightly wrapped around the outer periphery of the electrode layer 32; the electrode layer 32 is electrically connected to the second power supply 6. Specifically, when a voltage is applied to the electrode layer 32, the temperature of the electric card material unit 31 increases, the heat exchange fluid takes away the released heat, removes the electric field, the temperature of the electric card material unit 31 decreases, and absorbs the heat of the magnetic working fluid, reduces the temperature of the magnetic working fluid, and makes it closer to the internal temperature, thereby completing the electric card refrigeration cycle. It should be noted that the electrode layer 32 of this embodiment is conductive, so that an electric field is formed between the electrode layer 32 and the electric card material unit 31 when a voltage is applied, so that the electric card material unit 31 produces an electric card effect; the insulating layer 33 can prevent current leakage, protect the electric card material unit, and prevent the invasion of the external environment, which may cause damage to the electric card material unit 31. It should also be noted that the electrocaloric effect is a change in adiabatic temperature or isothermal entropy caused by a change in the polarization state due to a change in an external electric field in a polar material (i.e., the electrocaloric material unit 31). Specifically, when an electric field is applied to a polar material under adiabatic conditions, the electric dipoles in the polar material change from disorder to order, the degree of order increases, the entropy decreases, and the excess entropy generates temperature, causing the material temperature to rise; while removing the electric field under adiabatic conditions causes the electric dipoles in the polar material to change from order to disorder, the degree of order decreases, the entropy of the material increases, and the material absorbs heat from the outside to achieve cooling.

[0036] Furthermore, the electric card material unit 31 of this embodiment can be Y3Fe5O12, BiFeO3, Bi2Te2.7Se0.3, etc.; the insulating layer 33 can be an insulating film material such as polyimide PI, polyethylene PE, polyvinyl chloride PVC, etc.; the electrode layer 32 can use common platinum electrodes, silver electrodes or tungsten electrodes.

[0037] In this embodiment, a plurality of magnetic working fluids with different Curie temperatures are filled in the magnetic cooling bed 1, and the plurality of magnetic working fluids are arranged and filled according to the temperature gradient direction of the magnetic cooling bed (1), so that the temperature gradient of the magnetic cooling bed is consistent with the Curie temperature gradient direction of the magnetic working fluid. That is, according to the Curie temperature at which the magnetic working fluid produces magnetocaloric effect, the magnetic working fluid is filled in the magnetic cooling bed from the hot end to the cold end according to the Curie temperature from high to low. In this way, the magnetic working fluid can more fully carry out the magnetocaloric effect, thereby achieving an ideal cooling effect. It should be noted that the cold end refers to the end where the cold is transmitted, and the hot end refers to the other end of the magnetic cooling bed.

[0038] like Figure 1 and Figure 2As shown in the figure, a refrigeration device that couples magnetic refrigeration and electrocaloric refrigeration further includes an iron core layer 7 for enhancing the magnetic field of the electromagnetic coil 2. The iron core layer 7 is disposed between the outer sidewall of the magnetic refrigeration bed 1 and the electromagnetic coil 2, and the electromagnetic coil 2 is wound around the outer sidewall of the iron core layer 7. In this embodiment, the iron core layer 7 can strengthen the magnetic field generated by the electromagnetic coil 2.

[0039] As Figure 1 and Figure 4 shown in the figure, a refrigeration device that couples magnetic refrigeration and electrocaloric refrigeration further includes an induction coil layer 8 and a rectifying circuit 9. The second power supply 6 is a capacitor. The induction coil layer 8 is disposed between the outer sidewall of the magnetic refrigeration bed 1 and the iron core layer 7, and the inner wall of the induction coil layer 8 is in rolling contact with the outer wall of the magnetic refrigeration bed 1, and the outer wall of the induction coil 83 is in rolling contact with the inner wall of the iron core layer 7. The induction coil layer 8 is electrically connected to the capacitor to recover the generated electric energy; the capacitor is connected to the electrocaloric refrigeration component 3 through the rectifying circuit 9. In this embodiment, a sinusoidal alternating current is applied to the electromagnetic coil 2 to generate a magnetic field. The induction coil layer 8 is driven by an external force to rotate, cutting the magnetic field generated by the electromagnetic coil 2 to generate an induced current, and storing the induced current in the capacitor. The capacitor in this embodiment discharges, and through the rectifying circuit 9, the stored electric energy is converted into direct current to apply an electric field to the electrocaloric material, recycling the electric energy repeatedly. In this embodiment, by recovering the induced current generated by Faraday's electromagnetic induction law, the energy utilization efficiency and energy-saving level of the system are improved.

[0040] As Figure 2 shown in the figure, the induction coil layer 8 includes an inner layer 81, an outer layer 82, and an induction coil 83. Hook-shaped structures 84 are uniformly arranged circumferentially between the inner layer 81 and the outer layer 82, and the induction coil 83 is wound on the hook-shaped structures 84. The inner sidewall of the inner layer 81 is in rolling contact with the outer sidewall of the magnetic refrigeration bed 1, and the outer sidewall of the outer layer 82 is in rolling contact with the inner sidewall of the iron core layer 7. In this embodiment, the hook-shaped structures 84 facilitate fixing the induction coil 83 on the outer wall of the inner layer 81, and at the same time facilitate adjusting the position of the induction coil 83; that is, the position of the induction coil 83 can be finely adjusted as needed to obtain a better electromagnetic coupling effect or induction effect. If the induction coil 83 is directly wound on the outer wall of the inner layer 81, the induction coil 83 itself will have additional forces and tensions to make the induction coil 83 firmly fixed on the outer wall of the inner layer 81, while using the hook-shaped structures 84 to fix the induction coil 83 can reduce the force and stress of the induction coil 83, thereby improving the stability and lifespan of the induction coil 83.

[0041] Furthermore, there are ball bearings between the inner layer 81 and the outer sidewall of the magnetic refrigeration bed 1 so that the inner layer 81 can rotate around the magnetic refrigeration bed 1; there are also ball bearings between the outer layer 82 and the inner wall of the iron core so that the outer layer 82 can rotate relative to the iron core, enabling the induction coil 83 to rotate and cut the magnetic field to generate electric energy.

[0042] As Figure 6 shown, the refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration in this embodiment further includes a blower 152 and a flywheel energy storage device 151. The flywheel energy storage device 151 is mechanically connected to the blower 152 to store the mechanical energy generated by the blower 152. The flywheel shaft of the flywheel energy storage device 151 is connected to the inner layer 81 to drive the inner layer 81 to rotate.

[0043] In this embodiment, under the action of natural wind, the blower 152 converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft and then stores it in the flywheel energy storage device 151. The flywheel shaft of the flywheel energy storage device 151 is connected to the inner layer 81, thereby driving the inner layer 81 to rotate, causing the induction coil 83 to rotate, and further generating an induced current that is stored in the storage battery through the circuit. Specifically, the flywheel shaft of the flywheel energy storage device 151 is connected to the induction coil layer 8 through gear transmission to drive the induction coil 83 to rotate. That is, as Figure 6 shown, the inner layer 81 extends outward to form a connecting portion 85. A first gear is installed at the connecting portion 85, and a second gear meshing with the first gear is installed on the flywheel shaft of the flywheel energy storage device 151.

[0044] Embodiment 2

[0045] As Figure 6As shown in the figure, a refrigeration cycle system. The refrigeration cycle system of this embodiment includes a refrigeration device as in Embodiment 1, a first piston pump 101, a first heat exchanger 111, and a first constant-temperature cold storage 121. The first piston pump 101 includes a first cavity 11, a first piston 12, and a second cavity 13. The first piston 12 is arranged between the first cavity 11 and the second cavity 13 and reciprocates between the first cavity 11 and the second cavity 13. One end of the magnetic refrigeration bed 1 of the refrigeration device is communicated with one end of the first heat exchanger 111, the other end of the first heat exchanger 111 is communicated with the first cavity 11, the second cavity 13 is communicated with one end of the first constant-temperature cold storage 121, and the first constant-temperature cold storage 121 is communicated with the other end of the magnetic refrigeration bed 1 of the refrigeration device. In this embodiment, the first power supply 5 is a sinusoidal alternating current. After the electromagnetic coil 2 is energized, a magnetic field is generated. During the process that the magnetic field gradually increases to the maximum value, the magnetic working medium of the magnetic refrigeration bed 1 is magnetized. At this time, the magnetic working medium of the magnetic refrigeration bed 1 is in the stage of magnetizing heat blowing, driving the first piston 12 to move to the right, pumping the heat exchange fluid into the first constant-temperature cold storage 121. The heat exchange fluid enters the magnetic refrigeration bed 1 through the first constant-temperature cold storage 121, that is, flows into the gap between the magnetic working media, exchanges heat with the magnetic working medium in the heat release state and the temperature rises, flows into the first heat exchanger 111 for heat exchange, and finally flows back to the first piston pump 101. The sinusoidal alternating current continues to change and gradually decreases, and the generated magnetic field also gradually decreases from the maximum value to 0. During this process, the refrigeration device is in the stage of demagnetizing cold blowing, driving the first piston 12 in the first piston pump 101 to move to the left. The heat exchange fluid flows out from the first piston pump 101, enters the refrigeration device through the first heat exchanger 111, exchanges heat with the magnetic working medium in the heat absorption state and the temperature decreases, then flows into the first constant-temperature cold storage 121 and exchanges heat with it, so that the first constant-temperature cold storage 121 can store cold energy. The heat exchange fluid after heat exchange finally flows back to the first piston pump 101. After the first constant-temperature cold storage 121 reaches the target temperature, that is, after storing enough cold energy, it can quickly refrigerate the environment.

[0046] As Figure 6As shown, the refrigeration cycle system of this embodiment further includes a first three-way valve 131, a first stop valve 141, and a second heat exchanger 112. The first three-way valve 131 has an inlet and two outlets. The inlet is connected to the first constant temperature cold storage device 121, one of the outlets is connected to the magnetic cold bed 1 of the refrigeration device, and the other outlet is connected to one end of the second heat exchanger 112; one end of the first stop valve 141 is connected to the second cavity 13, and the other end is connected to the other end of the second heat exchanger 112. In this embodiment, when the first constant temperature cold storage device 121 needs to accumulate cold, the first stop valve 141 is closed, and the outlet of the first three-way valve 131 connected to the second heat exchanger 112 is closed, so that the other outlet of the first three-way valve 131 is connected to the magnetic cold bed 1 of the refrigeration device. When the external space needs to be cooled, the first stop valve 141 is opened, the outlet of the first three-way valve 131 connected to the first constant temperature cold storage device 121 is closed, and the outlet of the first three-way valve 131 connected to the second heat exchanger 112 is opened, and the heat exchange fluid is driven to flow by the first piston pump 101, so that the heat exchange fluid reciprocates in the circuit formed by the magnetic refrigeration bed 1, the first heat exchanger 111, the first piston pump 101, and the second heat exchanger 112 of the refrigeration device. During operation, the magnetic working fluid generates a magnetocaloric effect in the magnetic refrigeration bed 1 through the alternating magnetic field, and the heat exchange fluid is driven to flow by the first piston pump 101 to take away the generated heat or bring the cold released by the magnetic working fluid to the second heat exchanger 112, thereby continuously cooling the refrigeration space.

[0047] Example 3

[0048] This embodiment is similar to embodiment 2, except that Figure 6 As shown, the refrigeration cycle system of this embodiment includes at least two refrigeration devices, a second constant temperature cold storage device 122 and a second piston pump 102, wherein one end of the magnetic refrigeration bed 1 of the other refrigeration device is connected to the first constant temperature cold storage device 121, and the other end is connected to the second constant temperature cold storage device 122; the second piston pump 102 has a third cavity 14, a second piston 15 and a fourth cavity 16, and the second piston 15 is arranged between the third cavity 14 and the fourth cavity 16 and reciprocates; the third cavity 14 is connected to the first constant temperature cold storage device 121, and the fourth cavity 16 is connected to the second constant temperature cold storage device 122.

[0049] More specifically, in this embodiment, three refrigeration devices are provided, and the first power supply 5 is a three-phase sinusoidal alternating current. Figure 4 , Figure 5 and Figure 6 As shown, the three refrigeration devices are named from left to right as the first refrigeration device 161, the second refrigeration device 162, and the third refrigeration device 163; specifically, as Figure 5As shown, the electromagnetic coil 2 in the first refrigeration device 161 is connected to the A phase of the three-phase sinusoidal alternating current, the electromagnetic coil 2 in the second refrigeration device 162 is connected to the B phase of the three-phase sinusoidal alternating current, and the electromagnetic coil 2 in the third refrigeration device 163 is connected to the C phase of the three-phase sinusoidal alternating current. Additionally, in this embodiment, a third piston pump 103 and a third constant-temperature cold storage 123 corresponding to the third refrigeration device 163 are provided. The third piston pump 103 has a fifth cavity 17, a third piston 18, and a sixth cavity 19. The third piston 18 is disposed between the fifth cavity 17 and the sixth cavity 19 and reciprocates between the fifth cavity 17 and the sixth cavity 19.

[0050] That is, one end of the magnetic refrigeration bed 1 of the first refrigeration device 161 is communicated with one end of the first heat exchanger 111, the other end of the first heat exchanger 111 is communicated with the first cavity 11, the second cavity 13 is communicated with one end of the first constant-temperature cold storage 121, and the first constant-temperature cold storage 121 is communicated with the other end of the magnetic refrigeration bed 1 of the refrigeration device. One end of the second refrigeration device 162 is communicated with one end of the first constant-temperature cold storage 121, the other end is communicated with the second constant-temperature cold storage 122, the third cavity 14 is communicated with the first constant-temperature cold storage 121, and the fourth cavity 16 is communicated with the second constant-temperature cold storage 122. One end of the magnetic refrigeration bed 1 of the third refrigeration device 163 is communicated with one end of the second constant-temperature cold storage 122, the other end is communicated with the third constant-temperature cold storage 123, the fifth cavity 17 is communicated with the second constant-temperature cold storage 122, and the sixth cavity 19 is communicated with the third constant-temperature cold storage 123.

[0051] During the working process, after the electromagnetic coil 2 of the first refrigeration device 161 is energized, a magnetic field is generated. During the process of the magnetic field gradually increasing to the maximum value, the first refrigeration device 161 is magnetized. At this time, the magnetic working medium of the magnetic refrigeration bed 1 of the first refrigeration device 161 is in the stage of magneto-thermal blowing, driving the first piston 12 to move to the right, pumping the heat exchange fluid into the first constant-temperature cold storage 121. The heat exchange fluid enters the magnetic refrigeration bed 1 of the first refrigeration device 161 through the first constant-temperature cold storage 121, that is, flows into the gap between the magnetic working media, exchanges heat with the magnetic working medium in the heat release state and the temperature rises, and then flows into the first heat exchanger 111 for heat exchange, and finally flows back to the first piston pump 101. The three-phase alternating current continues to change and gradually decreases, and the generated magnetic field also gradually decreases from the maximum value to 0. During this process, the magnetic working medium of the magnetic refrigeration bed 1 of the first refrigeration device 161 is in the stage of demagnetization cold blowing, driving the first piston 12 in the first piston pump 101 to move to the left. The heat exchange fluid flows out from the first piston pump 101, enters the magnetic refrigeration bed 1 of the refrigeration device through the first heat exchanger 111, exchanges heat with the magnetic working medium in the heat absorption state and the temperature decreases, then flows into the first constant-temperature cold storage 121 and exchanges heat with it, enabling the first constant-temperature cold storage 121 to store cold energy. The heat exchange fluid after heat exchange finally flows back to the first piston pump 101.

[0052] After the electromagnetic coil 2 of the second refrigeration device 162 is energized, a magnetic field is generated. During the process that the magnetic field gradually increases to the maximum value, the magnetic refrigeration bed 1 of the second refrigeration device 162 is magnetized; at this time, the magnetic working medium of the magnetic refrigeration bed 1 of the second refrigeration device 162 is in the magnetizing heat blowing stage, driving the second piston 15 to move to the right, pumping the heat exchange fluid into the second constant temperature cold storage 122. The heat exchange fluid enters the magnetic refrigeration bed 1 of the second refrigeration device 162 through the first constant temperature cold storage 121, that is, flows into the gap between the magnetic working media, exchanges heat with the magnetic working medium in the heat release state and the temperature rises, then flows into the first constant temperature cold storage 121 for heat exchange, and finally flows back to the second piston pump 102; the three-phase alternating current continues to change and gradually decreases, and the generated magnetic field also gradually decreases from the maximum value to 0. During this process, the magnetic working medium of the magnetic refrigeration bed 1 of the second refrigeration device 162 is in the demagnetizing cold blowing stage, driving the second piston 15 in the second piston pump 102 to move to the left. The heat exchange fluid flows out of the second piston pump 102, enters the magnetic refrigeration bed 1 of the refrigeration device through the first constant temperature cold storage 121, exchanges heat with the magnetic working medium in the heat absorption state and the temperature decreases, then flows into the second constant temperature cold storage 122 and exchanges heat with it, enabling the second constant temperature cold storage 122 to accumulate cold energy, and the heat exchange fluid after heat exchange finally flows back to the second piston pump 102.

[0053] After the electromagnetic coil 2 of the third refrigeration device 163 is energized, a magnetic field is generated. During the process that the magnetic field gradually increases to the maximum value, the magnetic working medium of the magnetic refrigeration bed 1 of the third refrigeration device 163 is magnetized; at this time, the magnetic working medium of the magnetic refrigeration bed 1 of the third refrigeration device 163 is in the magnetizing heat blowing stage, driving the third piston 18 to move to the right, pumping the heat exchange fluid into the third constant temperature cold storage 123. The heat exchange fluid enters the third refrigeration device 163 through the third constant temperature cold storage 123, that is, flows into the gap between the magnetic working media, exchanges heat with the magnetic working medium in the heat release state and the temperature rises, then flows into the second constant temperature cold storage 122 for heat exchange, and finally flows back to the third piston pump 103; the three-phase alternating current continues to change and gradually decreases, and the generated magnetic field also gradually decreases from the maximum value to 0. During this process, the magnetic working medium of the magnetic refrigeration bed 1 of the third refrigeration device 163 is in the demagnetizing cold blowing stage, driving the third piston 18 in the third piston pump 103 to move to the left. The heat exchange fluid flows out along the third piston pump 103, enters the magnetic refrigeration bed of the third refrigeration device 163 through the second constant temperature cold storage 122, exchanges heat with the magnetic working medium in the heat absorption state and the temperature decreases, then flows into the third constant temperature cold storage 123 and exchanges heat with it, enabling the third constant temperature cold storage 123 to accumulate cold energy, and the heat exchange fluid after heat exchange finally flows back to the third piston pump 103.

[0054] It should be noted that the constant-temperature cold storage needs a certain amount of time to store cold energy to achieve a rapid refrigeration effect. The temperatures of the first constant-temperature cold storage 121, the second constant-temperature cold storage 122, and the third constant-temperature cold storage 123 in this embodiment decrease in sequence. That is, the second constant-temperature cold storage 122 starts refrigerating after the first constant-temperature cold storage 121 reaches the target temperature, and the third constant-temperature cold storage 123 starts refrigerating after the second constant-temperature cold storage 122 reaches the target temperature. This embodiment utilizes the coupling of magnetic refrigeration and electrocaloric refrigeration to fully exert the refrigeration efficiency of the magnetic working medium and effectively increase the heat transfer efficiency inside the magnetic refrigeration bed 1; through the joint operation of three refrigeration devices connected to three-phase sinusoidal alternating current, a large temperature-span refrigeration from the temperature of the first constant-temperature cold storage 121 to the temperature of the third constant-temperature cold storage 123 is established.

[0055] Embodiment 4

[0056] This embodiment is similar to Embodiment 3, except that on the basis of Embodiment 2, a second three-way valve 132, a third three-way valve 133, a second stop valve 142, a third stop valve 143, a third heat exchanger 113, and a fourth heat exchanger 114 are added.

[0057] As Figure 6 shown, the inlet of the first three-way valve 131 is connected to the first constant-temperature cold storage 121, one of its outlets is connected to the magnetic refrigeration bed 1 of the first refrigeration device 161, and the other outlet is connected to one end of the second heat exchanger 112; one end of the first stop valve 141 is connected to the second cavity 13, and the other end is connected to the other end of the second heat exchanger 112; the inlet of the second three-way valve 132 is connected to the second constant-temperature cold storage 122, one of its outlets is connected to the magnetic refrigeration bed 1 of the second refrigeration device 162, and the other outlet is connected to one end of the third heat exchanger 113; one end of the second stop valve 142 is connected to the fourth cavity 16, and the other end is connected to the other end of the third heat exchanger 113; the inlet of the third three-way valve 133 is connected to the third constant-temperature cold storage 123, one of its outlets is connected to the magnetic refrigeration bed 1 of the third refrigeration device 163, and the other outlet is connected to one end of the fourth heat exchanger 114; one end of the third stop valve 143 is connected to the sixth cavity 19, and the other end is connected to the other end of the fourth heat exchanger 114. Further, the first refrigeration device 161, the first heat exchanger 111, the first piston pump 101, and the second heat exchanger 112 that are sequentially interconnected form a first loop, the second refrigeration device 162, the first constant-temperature cold storage 121, the second piston pump 102, and the third heat exchanger 113 that are sequentially interconnected form a second loop, and the third refrigeration device 163, the second constant-temperature cold storage 122, the third piston pump 103, and the fourth heat exchanger 114 that are sequentially interconnected form a third loop.

[0058] When the refrigeration space needs to be refrigerated, open the first stop valve 141, the second stop valve 142, and the third stop valve 143, and close the inlets where the first three-way valve 131 communicates with the first constant-temperature cold storage 121, the inlets where the second three-way valve 132 communicates with the second constant-temperature cold storage 122, and the inlets where the third three-way valve 133 communicates with the magnetic refrigeration bed 1 of the third constant-temperature cold storage 123. Open the outlets where the first three-way valve 131 communicates with the second heat exchanger 112, the outlets where the second three-way valve 132 communicates with the third heat exchanger 113, and the outlets where the third three-way valve 133 communicates with the fourth heat exchanger 114. Drive the heat exchange fluid to flow through the first piston pump 101, the second piston pump 102, and the third piston pump 103, so that the heat exchange fluid reciprocates in the first circuit, the second circuit, and the third circuit. The magnetic working medium undergoes a magnetocaloric effect in the magnetic refrigeration bed 1 under an alternating magnetic field. Drive the heat exchange fluid to flow through the first piston pump 101, the second piston pump 102, and the third piston pump 103 to take away the generated heat and bring the released cold to the first heat exchanger 111, the second heat exchanger 112, the third heat exchanger 113, and the fourth heat exchanger 114 for heat exchange, thereby continuously refrigerating the refrigeration space.

[0059] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration, characterized in that, It includes a magnetic refrigeration bed (1) filled with a magnetic working medium, an electromagnetic coil (2), an electrocaloric refrigeration component (3), a temperature sensor (4), a first power supply (5), a second power supply (6), and a controller. The electromagnetic coil (2) is arranged on the outer periphery of the magnetic refrigeration bed (1). There is a gap between the magnetic working media inside the magnetic refrigeration bed (1), and the temperature sensor (4) is arranged in the gap to detect the temperature of the magnetic working medium. The electrocaloric refrigeration component (3) is arranged inside the magnetic refrigeration bed (1). The electromagnetic coil (2) is connected to the first power supply (5) so that the electromagnetic coil (2) generates an alternating magnetic field. The electrocaloric refrigeration component (3) is electrically connected to the second power supply (6). The controller is electrically connected to the temperature sensor (4) and the second power supply (6) respectively.

2. The refrigeration device with coupling of magnetic refrigeration and electrocaloric refrigeration according to claim 1, wherein The electrocaloric refrigeration component (3) includes an electrocaloric material unit (31), an electrode layer (32), and an insulating layer (33). The electrode layer (32) is arranged on the outer layer of the electrocaloric material unit (31), and the insulating encapsulation layer (33) covers the outer periphery of the electrode layer (32). The electrode layer (32) is electrically connected to the second power supply (6).

3. The refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration according to claim 1, characterized in that, A plurality of magnetic working media with different Curie temperatures are filled in the magnetic refrigeration bed (1), and the plurality of magnetic working media are arranged and filled according to the temperature gradient direction of the magnetic refrigeration bed (1) so that the temperature gradient of the magnetic refrigeration bed (1) is consistent with the Curie temperature gradient direction of the magnetic working medium.

4. The refrigeration device with coupling of magnetic refrigeration and electrocaloric refrigeration according to claim 1, characterized in that, The refrigeration device further includes an iron core layer (7) for enhancing the magnetic field of the electromagnetic coil (2). The iron core layer (7) is arranged between the outer side wall of the magnetic refrigeration bed (1) and the electromagnetic coil (2), and the electromagnetic coil (2) is wound around the outer side wall of the iron core layer (7).

5. The refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration according to claim 4, wherein, The refrigeration device further includes an induction coil layer (8) and a rectifying circuit (9). The second power supply (6) is a storage battery. The induction coil layer (8) is arranged between the outer side wall of the magnetic refrigeration bed (1) and the iron core layer (7), and the inner wall of the induction coil layer (8) is in rolling contact with the outer wall of the magnetic refrigeration bed (1). The outer wall of the induction coil (8) is in rolling contact with the inner wall of the iron core layer (7). The induction coil layer (8) is electrically connected to the storage battery to recover the generated electric energy. The storage battery is connected to the electrocaloric refrigeration component (3) through the rectifying circuit (9).

6. The refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration according to claim 5, characterized in that, The induction coil layer (8) includes an inner layer (81), an outer layer (82), and an induction coil (83). Hook-shaped structures (84) are uniformly arranged circumferentially between the inner layer (81) and the outer layer (82). The induction coil (83) is wound on the hook-shaped structures (84). The inner side wall of the inner layer (81) is in rolling contact with the outer side wall of the magnetic refrigeration bed (1), and the outer side wall of the outer layer (82) is in rolling contact with the inner side wall of the iron core layer (7).

7. The refrigeration device coupling magnetic refrigeration and electrocaloric refrigeration according to claim 6, characterized in that, It further includes a fan (152) and a flywheel energy storage device (151). The flywheel energy storage device (151) is mechanically connected to the fan (152) to store the mechanical energy generated by the fan (152). The flywheel shaft of the flywheel energy storage device (151) is connected to the inner layer (81) to drive the inner layer (81) to rotate.

8. A refrigeration cycle system, characterized in that, The refrigeration cycle system includes the refrigeration device according to any one of claims 1 to 7, a first piston pump (101), a first heat exchanger (111), and a first constant-temperature cold storage device (121). The first piston pump (101) includes a first cavity (11), a first piston (12), and a second cavity (13). The first piston (12) is disposed between the first cavity (11) and the second cavity (13) and reciprocates between the first cavity (11) and the second cavity (12). One end of the magnetic refrigeration bed (1) of the refrigeration device communicates with one end of the first heat exchanger (111). The other end of the first heat exchanger (111) communicates with the first cavity (11). The second cavity (13) communicates with one end of the first constant-temperature cold storage device (121). The first constant-temperature cold storage device (121) communicates with the other end of the magnetic refrigeration bed (1) of the refrigeration device.

9. The refrigeration cycle system according to claim 8, wherein, It further includes a first three-way valve (131), a first stop valve (141), and a second heat exchanger (112). The first three-way valve (131) has one inlet and two outlets. The inlet communicates with the first constant-temperature cold storage device (121). One of the outlets communicates with one end of the magnetic refrigeration bed (1) of the refrigeration device. The other outlet communicates with one end of the second heat exchanger (112). One end of the first stop valve (111) communicates with the second cavity (13), and the other end communicates with the other end of the second heat exchanger (112).

10. The refrigeration cycle system according to claim 8, characterized in that, It includes at least two of the refrigeration devices, a second constant-temperature cold storage device (122), and a second piston pump (102). One end of the magnetic refrigeration bed (1) of another refrigeration device communicates with the first constant-temperature cold storage device (121), and the other end communicates with the second constant-temperature cold storage device (122). The second piston pump (102) has a third cavity (14), a second piston (15), and a fourth cavity (16). The second piston (15) is disposed between the third cavity (14) and the fourth cavity (16) and reciprocates. The third cavity (14) communicates with the first constant-temperature cold storage device (121), and the fourth cavity (16) communicates with the second constant-temperature cold storage device (122).

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