Cold storage device, cold storage device and magnetic refrigeration system

Abstract

The present application provides a cold storage device, a cold storage device and a magnetic refrigeration system. The cold storage device includes a shell, and two joints are provided on the shell, and the joints can be connected to the pipeline; an inner cavity and an inner flow channel are formed in the shell, and the inner cavity is used to accommodate the magnetocaloric material, and two first baffles and two second baffles are provided on the inner flow channel, and the first baffle is used to control whether the joint on the same side is connected to the inner flow channel, and the second baffle is used to control whether the two inner flow channels of adjacent cold storage devices are connected. Utilizing the cold storage device, the cold storage device includes a baffle for controlling the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a cold storage device, a cold storage apparatus and a magnetic refrigeration system. Background Art

[0002] The current mainstream refrigeration technology is steam compression, which has adverse effects on the environment. Therefore, people gradually shift their attention to the application of other green new refrigeration technologies. Magnetic refrigeration technology is environmentally friendly and energy-saving, and undoubtedly has obvious advantages. Nowadays, magnetic refrigeration technology is increasingly valued by research institutions in various countries due to its huge commercial potential. Related experimental research is also being carried out in various universities and scientific research institutions. The research hotspots of magnetic refrigeration technology are mainly on magnetic working fluid materials, the structure of magnetic refrigerators, and the development of heat exchange systems.

[0003] Magnetic refrigeration technology uses the magnetocaloric effect of magnetocaloric materials to produce a cooling effect. The magnetocaloric material is repeatedly magnetized and demagnetized, and the magnetic entropy inside the magnetocaloric material will continue to decrease and increase, which manifests as heat release and heat absorption to the outside world. When the external magnetic field increases, the magnetocaloric material is magnetized, its magnetic entropy decreases, and heat is released to the outside world. When the external magnetic field is removed, the magnetocaloric material is demagnetized, its magnetic entropy increases, and heat is absorbed from the outside world. Theoretically, under the same conditions, the greater the change in magnetic entropy, the greater the heat exchange capacity. Utilizing this feature of magnetocaloric materials, heat exchange fluids can be introduced into the heat exchange system to take away the heat and cold generated by the magnetocaloric material. The above process is repeated continuously, and they are connected with a specific circulation flow path to form a heat exchange component, thereby achieving continuous refrigeration.

[0004] The magnetic refrigeration system usually includes magnetocaloric material, magnetic field assembly, heat exchange fluid, cold storage tank, driving mechanism and heat exchange assembly. The magnetic field assembly is used to repeatedly magnetize and demagnetize the magnetocaloric material. The cold storage tank is filled with magnetocaloric material, and the heat exchange fluid and the magnetocaloric material are heat-converted in the cold storage tank. The heat exchange assembly is used to realize the heat exchange between the heat exchange fluid and the external environment and between the heat exchange fluid and the space to be cooled. The driving mechanism is the power source of the magnetic refrigeration system, which is used to realize the relative movement of the magnetic field assembly and the cold storage tank, or to drive the heat exchange fluid to flow.

[0005] The cyclic operation cycle of the magnetic refrigeration system is generally divided into four stages, namely: magnetization stage, heat flow stage, demagnetization stage, and cold flow stage. These four stages form a cycle, and the magnetic refrigerator operates in this cycle. In the magnetization stage, the magnet applies a magnetic field to the magnetocaloric material, the magnetic entropy of the magnetocaloric material decreases, heat is released to the outside, and the temperature rises. In the subsequent heat flow stage, a heat exchange fluid is passed through the cold storage device, and the heat exchange fluid takes away the heat generated by the magnetocaloric material, causing the temperature of the magnetocaloric material to drop. In the subsequent demagnetization stage, the magnetic field is removed, and the magnetic entropy of the magnetocaloric material increases due to demagnetization. It needs to absorb heat from the outside and the temperature drops. In the final cold flow stage, a heat exchange fluid is passed through the cold storage device again, allowing the magnetocaloric material to cool the heat exchange fluid, causing the temperature of the heat exchange fluid to drop. The magnetic refrigeration system then transfers the heat exchange fluid to the cold end heat exchanger to achieve refrigeration.

[0006] Generally speaking, the cold fluid in a magnetic refrigeration system refers to the heat exchange fluid that absorbs the cold of the magnetocaloric material during the demagnetization process; correspondingly, the hot fluid refers to the heat exchange fluid that absorbs the heat of the magnetocaloric material during the magnetization process.

[0007] Curie temperature is a characteristic property of magnetocaloric materials. It refers to the critical temperature at which magnetocaloric materials change from ferromagnetism to paramagnetism. After the magnetocaloric materials are processed and manufactured, their Curie temperature is fixed. Under the same magnetic field conditions, the magnetic entropy change of magnetocaloric materials at the Curie temperature is the largest, and the magnetocaloric effect is also the largest. Therefore, the Curie temperature of magnetocaloric materials in room temperature magnetic refrigeration systems should be close to their operating temperature.

[0008] The actual working performance of the magnetic refrigeration system is closely related to the number of cold storage devices in the system and the system form. The number of different cold storage devices will inevitably lead to large differences in the composition of the magnetic refrigeration system. However, the current magnetic refrigeration system is not yet mature, and its prototype form is not uniform. In addition, the magnetic refrigeration system involves magnetic field components, cold storage devices, drive mechanisms, and heat exchange components, and the devices are relatively complex. After the installation of the magnetic refrigeration system, it is not suitable to be disassembled repeatedly. Therefore, the structure of the cold storage device is fixed after installation, resulting in the form of the heat exchange system being fixed. It is not easy to change during operation, which makes it difficult to adjust the refrigeration capacity of the magnetic refrigeration system. Summary of the invention

[0009] In view of the above problems in the prior art, the present application proposes a cold storage device, a cold storage device and a magnetic refrigeration system. The cold storage device includes a baffle for controlling the flow direction of the heat exchange fluid, which is conducive to the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0010] In the first aspect, the present invention provides a cold storage device, which includes a shell, and the shell is provided with two joints, and the joints can be connected to the pipeline; an inner cavity and an inner flow channel are formed in the shell, and the inner cavity is used to accommodate magnetocaloric materials, and the inner flow channel is provided with two first baffles and two second baffles, the first baffle is used to control whether the joint on the same side is connected to the inner flow channel, and the second baffle is used to control whether the two inner flow channels of adjacent cold storage devices are connected. Using this cold storage device, the cold storage device includes a baffle for controlling the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0011] In an embodiment of the first aspect, the first baffle plate is opened or closed by moving upward or downward to open or close the fluid passage between the joint and the inner flow channel on the same side thereof, and two adjacent second baffle plates of adjacent cold storage devices are opened or closed by moving upward or downward together to open or close the connection between the two inner flow channels of adjacent cold storage devices. This embodiment is conducive to controlling the flow direction of the heat exchange fluid by controlling the opening or closing of the baffle plate.

[0012] In a second aspect, the present invention further provides a cold storage device, which includes an even number of cold storage devices described in the first aspect and any embodiment thereof. Using the cold storage device, the cold storage device includes a baffle to control the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0013] In one embodiment of the second aspect, the cold storage devices are connected in sequence to form a closed loop. According to this embodiment, the cold storage devices are connected in sequence, so that the inner flow channels of adjacent cold storage devices can be interconnected by opening the corresponding two second baffles, which is beneficial to control the flow direction of the heat exchange fluid, so as to facilitate the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0014] In an embodiment of the second aspect, the cold storage device includes an even number of refrigeration modules, each refrigeration module includes an equal number of cold storage devices, and the cold storage devices in each refrigeration module are connected in sequence. This embodiment is conducive to ensuring the normal operation of the cold storage device.

[0015] In an embodiment of the second aspect, the refrigeration module includes a cold storage device, the two first baffles of the cold storage device are open, and the two second baffles of the cold storage device are closed; or the refrigeration module includes multiple cold storage devices, the first baffles on the outer sides of the two cold storage devices at both ends are open and the second baffles are closed, the other first baffles of the refrigeration module are closed, and the other second baffles of the refrigeration module are open. This embodiment facilitates the heat exchange fluid to flow into the refrigeration module from one end and out of the refrigeration module from the other end.

[0016] In an embodiment of the second aspect, an even number of refrigeration modules of the cold storage device are evenly distributed along the circumference of the cold storage device. Through this embodiment, it can be ensured that when one refrigeration module is in a magnetized state, the refrigeration module symmetrical to its center is in a demagnetized state, thereby ensuring the normal operation of the cold storage device.

[0017] In a third aspect, the present invention further provides a magnetic refrigeration system, which includes the cold storage device described in the second aspect and any embodiment thereof. Using the magnetic refrigeration system, the cold storage device includes a baffle to control the flow direction of the heat exchange fluid, which is conducive to the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0018] In one embodiment of the third aspect, the magnetic refrigeration system further includes: a hot end heat exchanger for releasing the heat generated by the cold storage device to the outside of the area to be refrigerated; a cold end heat exchanger for releasing the cold generated by the cold storage device to the area to be refrigerated; a pump for driving the heat exchange fluid; a constant temperature tank for providing constant temperature cooling water; a cooler for cooling the heat exchange fluid flowing out of the pump; and an exhaust tank for exhausting the gas generated by the magnetic refrigeration system during operation. This embodiment is conducive to the normal operation of the magnetic refrigeration system.

[0019] In an implementation of the third aspect, the magnetic refrigeration system uses the refrigeration module of the cold storage device for refrigeration. This implementation is beneficial for the magnetic refrigeration system to use the refrigeration module for refrigeration.

[0020] In an implementation of the third aspect, the cold storage device includes two refrigeration modules, and the two refrigeration modules are connected in parallel between the hot end heat exchanger and the cold end heat exchanger; when one refrigeration module is in a demagnetization stage, the other refrigeration module is in a magnetization stage. This implementation is conducive to the normal operation of the magnetic refrigeration system including two refrigeration modules, and the refrigeration capacity of the magnetic refrigeration system can be adjusted by adjusting the number of cold storage devices in the refrigeration modules.

[0021] In one embodiment of the third aspect, the cold storage device includes four refrigeration modules, which are connected in parallel between the hot end heat exchanger and the cold end heat exchanger; the four refrigeration modules are respectively a first refrigeration module, a second refrigeration module, a third refrigeration module and a fourth refrigeration module; when the first refrigeration module is in a cold flow stage, the second refrigeration module is in a hot flow stage, the third refrigeration module is in a demagnetization stage, and the fourth refrigeration module is in a magnetization stage. This embodiment is conducive to the normal operation of the magnetic refrigeration system including four refrigeration modules, and the refrigeration capacity of the magnetic refrigeration system can be adjusted by adjusting the number of cold storage devices in the refrigeration modules.

[0022] The cold storage device, cold storage apparatus and magnetic refrigeration system provided in the present application have the following beneficial effects compared with the prior art.

[0023] 1. The cold storage device includes a baffle for controlling the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0024] 2. The cold storage devices are connected in sequence to form a closed loop, so that the inner flow channels of adjacent cold storage devices can be interconnected by opening the corresponding two second baffles, which is beneficial to controlling the flow direction of the heat exchange fluid, so as to facilitate the magnetic refrigeration system to change different refrigeration module combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0025] 3. The refrigeration capacity of the magnetic refrigeration system can be adjusted by adjusting the number of cold storage devices in the refrigeration module and the number of refrigeration modules.

[0026] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, in which:

[0028] Figure 1 A front view of a cold storage device according to an embodiment of the present invention is shown;

[0029] Figure 2 shows a side view of a cold storage device according to an embodiment of the present invention;

[0030] Figure 3 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having two refrigeration modules, each of which has a cold storage device;

[0031] Figure 4 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having two refrigeration modules, each of which has two cold storage devices;

[0032] Figure 5 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having two refrigeration modules, each of which has three cold storage devices;

[0033] Figure 6 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having four refrigeration modules, each of which has a cold storage device;

[0034] Figure 7 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having four refrigeration modules, each of which has two cold storage devices;

[0035] Figure 8 A cold storage device according to an embodiment of the present invention is shown, the cold storage device having four refrigeration modules, each of which has three cold storage devices;

[0036] Fig. 9 A magnetic refrigeration system according to an embodiment of the present invention is shown, wherein a cold storage device of the magnetic refrigeration system has two refrigeration modules;

[0037] Fig.10 A magnetic refrigeration system according to an embodiment of the present invention is shown, wherein a cold storage device of the magnetic refrigeration system has four refrigeration modules.

[0038] Reference numerals list:

[0039] 1-cold storage device; 2-shell; 3-joint; 4-inner cavity; 5-first baffle; 6-second baffle; 7-refrigeration module; 8-first refrigeration module; 9-second refrigeration module; 10-third refrigeration module; 11-fourth refrigeration module; 12-hot end heat exchanger; 13-cold end heat exchanger; 14-pump; 15-constant temperature bath; 16-cooler; 17-exhaust tank; 18-first solenoid valve; 19-second solenoid valve; 20-third solenoid valve; 21-fourth solenoid valve; 22-fifth solenoid valve; 23-eleventh solenoid valve; 24-twelfth solenoid valve Solenoid valve; 25-the thirteenth solenoid valve; 26-the fourteenth solenoid valve; 27-the fifteenth solenoid valve; 28-the sixteenth solenoid valve; 29-the seventeenth solenoid valve; 30-the eighteenth solenoid valve; 32-the first one-way valve; 33-the second one-way valve; 34-the third one-way valve; 35-the fourth one-way valve; 36-the eleventh one-way valve; 37-the twelfth one-way valve; 38-the thirteenth one-way valve; 39-the fourteenth one-way valve; 40-the fifteenth one-way valve; 41-the sixteenth one-way valve; 42-the seventeenth one-way valve; 43-the eighteenth one-way valve; 44-cold storage device.

[0040] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides a cold storage device 1, which includes a shell 2, on which two joints 3 are arranged, and the joints 3 can be connected to the pipeline; an inner cavity 4 and an inner flow channel are formed in the shell 2, and the inner cavity 4 is used to accommodate magnetocaloric material, and two first baffles 5 and two second baffles 6 are arranged on the inner flow channel, the first baffle 5 is used to control whether the joint 3 on the same side thereof is connected to the inner flow channel, and the second baffle 6 is used to control whether two inner flow channels of adjacent cold storage devices 1 are connected.

[0043] The cold storage tank 1 has two side walls, namely, a first side and a second side. The second side is in front of the first side in the counterclockwise direction. The first side of the cold storage tank 1 is provided with a first baffle plate 5 of the first side and a second baffle plate 6 of the first side, and the second side of the cold storage tank 1 is provided with a first baffle plate 5 of the second side and a second baffle plate 6 of the second side.

[0044] When the first baffle 5 on the first side and the first baffle 5 on the second side of the cold accumulator 1 are opened, and the second baffle 6 on the first side is closed and the second baffle 6 on the second side is closed, the heat exchange fluid in the pipeline enters the cold accumulator 1 through the first side joint 3, enters the inner flow channel through the first side first baffle 5, and after heating or cooling the magnetocaloric material in the inner cavity 4, flows out of the inner flow channel through the second side first baffle 5, and flows out of the cold accumulator 1 through the second side joint 3; or, the heat exchange fluid in the pipeline enters the cold accumulator 1 through the second side joint 3, enters the inner flow channel through the second side first baffle 5, and after heating or cooling the magnetocaloric material in the inner cavity 4, flows out of the inner flow channel through the first side first baffle 5, and flows out of the cold accumulator 1 through the first side joint 3.

[0045] When the first baffle 5 on the first side of the cold accumulator 1 is closed and the first baffle 5 on the second side is closed, and the second baffle 6 on the first side is opened and the second baffle 6 on the second side is opened, the heat exchange fluid enters the inner flow channel from the second baffle 6 on the first side of the cold accumulator 1 and flows out from the second baffle 6 on the second side; or, the heat exchange fluid enters the inner flow channel from the second baffle 6 on the second side of the cold accumulator 1 and flows out from the second baffle 6 on the first side; since the first baffle 5 on the first side is closed and the first baffle 5 on the second side is closed, the heat exchange fluid does not flow through the joint 3.

[0046] When the first baffle 5 on the first side of the cold accumulator 1 is opened and the first baffle 5 on the second side is closed, and the second baffle 6 on the first side is closed and the second baffle 6 on the second side is opened, the heat exchange fluid flows into the cold accumulator 1 from the first side joint 3, enters the inner flow channel through the first side first baffle 5, and flows out of the cold accumulator 1 from the second side second baffle 6; or, the heat exchange fluid flows into the cold accumulator 1 from the second side second baffle 6, enters the first side joint 3 through the first side first baffle 5, and flows out of the cold accumulator 1.

[0047] When the first baffle 5 on the first side of the cold accumulator 1 is closed and the first baffle 5 on the second side is opened, and the second baffle 6 on the first side is opened and the second baffle 6 on the second side is closed, the heat exchange fluid flows into the cold accumulator 1 from the second side joint 3, enters the inner flow channel through the second side first baffle 5, and flows out of the cold accumulator 1 from the first side second baffle 6 to enter the adjacent cold accumulator 1; or, the heat exchange fluid flows from the adjacent cold accumulator 1 through the first side second baffle 6 into the inner flow channel of the cold accumulator 1, then enters the second side joint 3 through the second side first baffle 5 and flows out of the cold accumulator 1.

[0048] The cold storage device 1 of this embodiment includes a baffle for controlling the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different combinations of refrigeration modules 7, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0049] In one embodiment, the first baffle 5 moves upward or downward to open or close, thereby opening or closing the fluid channel between the connector 3 and the inner flow channel on the same side thereof, and the two adjacent second baffles 6 of the adjacent cold storage tanks 1 move upward or downward together to open or close, thereby opening or closing the connection between the two inner flow channels of the adjacent cold storage tanks 1.

[0050] The first baffle 5 and the second baffle 6 can both be driven by a motor. The motor can be arranged on the housing 2 of the cold storage device 1, and a gear is arranged on the motor shaft to cooperate with the rack on the baffle. However, when the baffle needs to be opened, the controller controls the motor to rotate, and the motor shaft drives the baffle to move up through the gear and rack structure to open the baffle. Similarly, when the baffle needs to be closed, the controller controls the motor to rotate in the reverse direction, and the motor shaft drives the baffle to move down through the gear and rack structure to close the baffle.

[0051] Similarly, the first baffle 5 and the second baffle 6 may also be driven by an electromagnetic driver.

[0052] This embodiment is advantageous in that the flow direction of the heat exchange fluid can be controlled by controlling the opening or closing of the baffle.

[0053] This embodiment also provides a cold storage device 44, such as Figures 3 to 8 As shown, the cold storage device 44 includes an even number of the above-mentioned cold storage devices 1.

[0054] Two cold storage devices 1 symmetrically arranged around the center point of the cold storage device 44 form a group, and the two cold storage devices 1 in one group are in opposite stages, that is, when one of the cold storage devices 1 is in the magnetization stage, the other cold storage device 1 is in the demagnetization stage; when one cold storage device 1 is in the hot flow stage, the other cold storage device 1 is in the cold flow stage, thereby ensuring the normal operation of the cold storage device 44.

[0055] By utilizing the cold storage device 44, the cold storage device 1 includes a baffle to control the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module 7 combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0056] In one embodiment, if Figures 3 to 8 As shown, the cold storage devices 1 are connected in sequence to form a closed loop.

[0057] Through this implementation, the cold storage devices 1 are connected in sequence, so that the inner flow channels of adjacent cold storage devices 1 can be interconnected by opening the corresponding two second baffles 6, which is beneficial to controlling the flow direction of the heat exchange fluid, so as to facilitate the magnetic refrigeration system to change different refrigeration module 7 combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0058] In one embodiment, if Figures 3 to 8 As shown, the cold storage device 44 includes an even number of refrigeration modules 7 , each refrigeration module 7 includes an equal number of cold storage devices 1 , and the cold storage devices 1 in each refrigeration module 7 are connected in sequence.

[0059] When the cold storage device 44 is in use, only the refrigeration module 7 is working.

[0060] like Figure 3 As shown, the cold storage device 44 includes 12 cold storage devices 1. The cold storage device 44 includes two refrigeration modules 7, and each refrigeration module 7 includes a cold storage device 1.

[0061] like Figure 4 As shown, the cold storage device 44 includes 12 cold storage devices 1. The cold storage device 44 includes two refrigeration modules 7, and each refrigeration module 7 includes two cold storage devices 1.

[0062] like Figure 5 As shown, the cold storage device 44 includes 12 cold storage devices 1. The cold storage device 44 includes two refrigeration modules 7, and each refrigeration module 7 includes three cold storage devices 1.

[0063] like Figure 6 As shown, the cold storage device 44 includes 12 cold storage devices 1. The cold storage device 44 includes four refrigeration modules 7, and each refrigeration module 7 includes a cold storage device 1.

[0064] like Figure 7 As shown, the cold storage device 44 includes 12 cold storage devices 1 . The cold storage device 44 includes four refrigeration modules 7 , and each refrigeration module 7 includes two cold storage devices 1 .

[0065] like Figure 8 As shown, the cold storage device 44 includes 12 cold storage devices 1. The cold storage device 44 includes four refrigeration modules 7, and each refrigeration module 7 includes three cold storage devices 1.

[0066] When the cold storage device 44 includes two refrigeration modules 7 , one refrigeration module 7 is in a magnetized state, and the other refrigeration module 7 is in a demagnetized state.

[0067] When the cold storage device 44 includes four refrigeration modules 7, the four refrigeration modules 7 enter four stages in sequence, and the stages of the refrigeration modules 7 are different from each other.

[0068] This embodiment is helpful to ensure the normal operation of the cold storage device 44 .

[0069] In one embodiment, the refrigeration module 7 includes a cold storage device 1, the two first baffles 5 of the cold storage device 1 are opened, and the two second baffles 6 of the cold storage device 1 are closed; or, the refrigeration module 7 includes multiple cold storage devices 1, the first baffles 5 on the outer sides of the two cold storage devices 1 at both ends are opened and the second baffles 6 are closed, and the other first baffles 5 of the refrigeration module 7 are closed and the other second baffles 6 of the refrigeration module 7 are opened.

[0070] The refrigeration module 7 includes two ends, the first end of which is the first side of the first end cold storage device 1, and the second end of which is the second side of the second end cold storage device 1. The heat exchange fluid flows into the refrigeration module 7 from the first end and flows out from the second end of the refrigeration module 7, or the heat exchange fluid flows into the refrigeration module 7 from the second end and flows out from the first end of the refrigeration module 7.

[0071] This embodiment facilitates the heat exchange fluid to flow into the refrigeration module 7 from one end and flow out from the other end of the refrigeration module 7 .

[0072] In one embodiment, an even number of refrigeration modules 7 of the cold storage device 44 are evenly distributed along the circumference of the cold storage device 44 .

[0073] Through this implementation, it can be ensured that when one refrigeration module 7 is in a magnetized state, the refrigeration module 7 symmetrical to its center is in a demagnetized state, thereby ensuring the normal operation of the cold storage device 44.

[0074] This embodiment further provides a magnetic refrigeration system, which includes the above-mentioned cold storage device 44.

[0075] Utilizing the magnetic refrigeration system, its cold storage device 1 includes a baffle to control the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different refrigeration module 7 combinations, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0076] In one embodiment, if Fig. 9 and Fig.10 As shown, the magnetic refrigeration system also includes: a hot-end heat exchanger 12, used to release the heat generated by the cold storage device 44 to the outside of the area to be refrigerated; a cold-end heat exchanger 13, used to release the cold generated by the cold storage device 44 to the area to be refrigerated; a pump 14, used to drive the heat exchange fluid; a constant temperature tank 15, used to provide constant temperature cooling water; a cooler 16, used to cool the heat exchange fluid flowing out of the pump 14; and an exhaust tank 17, used to discharge the gas generated by the magnetic refrigeration system during operation.

[0077] This implementation is conducive to the normal operation of the magnetic refrigeration system.

[0078] In one embodiment, the magnetic refrigeration system uses the refrigeration module 7 of the cold storage device 44 for refrigeration.

[0079] When the cold storage device 44 includes two refrigeration modules 7 , one refrigeration module 7 is in a magnetized state, and the other refrigeration module 7 is in a demagnetized state.

[0080] When the cold storage device 44 includes four refrigeration modules 7, the four refrigeration modules 7 enter four stages in sequence, and the stages of the refrigeration modules 7 are different from each other.

[0081] This implementation is beneficial for the magnetic refrigeration system to utilize the refrigeration module 7 for refrigeration.

[0082] In one embodiment, the cold storage device 44 includes two refrigeration modules 7, which are connected in parallel between the hot-end heat exchanger 12 and the cold-end heat exchanger 13; when one refrigeration module 7 is in the demagnetization stage, the other refrigeration module 7 is in the magnetization stage.

[0083] like Fig. 9 As shown, the magnetic refrigeration system includes five solenoid valves, four one-way valves and two refrigeration modules 7. The five solenoid valves are respectively the first solenoid valve 18, the second solenoid valve 19, the third solenoid valve 20, the fourth solenoid valve 21 and the fifth solenoid valve 22. The four one-way valves are respectively the first one-way valve 32, the second one-way valve 33, the third one-way valve 34 and the fourth one-way valve 35. The two refrigeration modules 7 are respectively the first refrigeration module 8 and the second refrigeration module 9.

[0084] The working states of the first refrigeration module 8 and the second refrigeration module 9 are opposite when the magnetic refrigeration system is running, that is, when the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage; when the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage; when the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage; when the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage.

[0085] like Figures 3 to 5 As shown, the first refrigeration module 8 and the second refrigeration module 9 are centrally symmetrical.

[0086] Alternatively, if Figure 3 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include a cold storage device 1 .

[0087] Alternatively, if Figure 4 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include two cold storage devices 1 .

[0088] Alternatively, if Figure 5 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include three cold storage devices 1 .

[0089] This is helpful for adjusting the refrigeration capacity of the magnetic refrigeration system. The more cold storage devices 1 there are in the refrigeration module 7, the stronger the refrigeration capacity of the magnetic refrigeration system.

[0090] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage, the first, second, third and fourth solenoid valves are all closed, and the fifth solenoid valve 22 is opened. At this time, the magnetic refrigeration system is in the internal circulation process.

[0091] In the second stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the first solenoid valve 18 and the second solenoid valve 19 are opened, and the third to fifth solenoid valves 22 are closed. The flow path of the heat exchange fluid is pump 14→cooler 16→first solenoid valve 18→first refrigeration module 8→first check valve 32→cold end heat exchanger 13→third check valve 34→second refrigeration module 9→second solenoid valve 19→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0092] In the third stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage, the first, second, third and fourth solenoid valves are all closed, and the fifth solenoid valve 22 is opened. At this time, the magnetic refrigeration system is in the internal circulation process.

[0093] In the fourth stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage, the first solenoid valve 18, the second solenoid valve 19 and the fifth solenoid valve 22 are closed, the third solenoid valve 20 and the fourth solenoid valve 21 are opened, and the flow path of the heat exchange fluid is pump 14→cooler 16→third solenoid valve 20→second refrigeration module 9→fourth one-way valve 35→cold end heat exchanger 13→second one-way valve 33→first refrigeration module 8→fourth solenoid valve 21→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0094] At this point, the four-stage cycle of a cycle is completed, and the subsequent cycle operation repeats this cycle process.

[0095] This embodiment facilitates the normal operation of the magnetic refrigeration system including two refrigeration modules 7 , and the refrigeration capacity of the magnetic refrigeration system can be adjusted by adjusting the number of cold storage devices 1 in the refrigeration module 7 .

[0096] In one embodiment, the cold storage device 44 includes four refrigeration modules 7, which are connected in parallel between the hot-end heat exchanger 12 and the cold-end heat exchanger 13; the four refrigeration modules 7 are respectively a first refrigeration module 8, a second refrigeration module 9, a third refrigeration module 10 and a fourth refrigeration module 11; when the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage.

[0097] like Fig.10 As shown, the magnetic refrigeration system includes nine solenoid valves, eight one-way valves and four refrigeration modules 7. The nine solenoid valves are respectively the eleventh solenoid valve 23, the twelfth solenoid valve 24, the thirteenth solenoid valve 25, the fourteenth solenoid valve 26, the fifteenth solenoid valve 27, the sixteenth solenoid valve 28, the seventeenth solenoid valve 29, the eighteenth solenoid valve 30 and the nineteenth solenoid valve. The eight one-way valves are respectively the eleventh one-way valve 36, the twelfth one-way valve 37, the thirteenth one-way valve 38, the fourteenth one-way valve 39, the fifteenth one-way valve 40, the sixteenth one-way valve 41, the seventeenth one-way valve 42 and the eighteenth one-way valve 43. The four refrigeration modules 7 are respectively the first refrigeration module 8, the second refrigeration module 9, the third refrigeration module 10 and the fourth refrigeration module 11.

[0098] The working states of the first refrigeration module 8 and the second refrigeration module 9 are opposite when the magnetic refrigeration system is running; and the working states of the third refrigeration module 10 and the fourth refrigeration module 11 are opposite when the magnetic refrigeration system is running.

[0099] like Figures 6 to 8 As shown, the first refrigeration module 8 and the second refrigeration module 9 are centrally symmetrical, and the third refrigeration module 10 and the fourth refrigeration module 11 are centrally symmetrical.

[0100] Alternatively, if Figure 6 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include a cold storage device 1 .

[0101] Alternatively, if Figure 7 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include two cold storage devices 1 .

[0102] Alternatively, if Figure 8 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include three cold storage devices 1 .

[0103] This is helpful for adjusting the refrigeration capacity of the magnetic refrigeration system. The more the number of cold storage devices 1 in the refrigeration module 7 and the more the number of refrigeration modules 7 are, the stronger the refrigeration capacity of the magnetic refrigeration system is.

[0104] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage. The eleventh solenoid valve 23 and the twelfth solenoid valve 24 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→eleventh solenoid valve 23→first refrigeration module 8→eleventh one-way valve 36→cold end heat exchanger 13→thirteenth one-way valve 38→second refrigeration module 9→twelfth solenoid valve 24→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0105] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage. The eleventh solenoid valve 23 and the twelfth solenoid valve 24 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→eleventh solenoid valve 23→first refrigeration module 8→eleventh one-way valve 36→cold end heat exchanger 13→thirteenth one-way valve 38→second refrigeration module 9→twelfth solenoid valve 24→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0106] In the second stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage, the third refrigeration module 10 is in the cold flow stage, and the fourth refrigeration module 11 is in the hot flow stage. The fifteenth solenoid valve 27 and the sixteenth solenoid valve 28 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→fifteenth solenoid valve 27→third refrigeration module 10→fifteenth one-way valve 40→cold end heat exchanger 13→seventeenth one-way valve 42→fourth refrigeration module 11→sixteenth solenoid valve 28→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0107] In the third stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage, the third refrigeration module 10 is in the magnetization stage, and the fourth refrigeration module 11 is in the demagnetization stage. The thirteenth solenoid valve 25 and the fourteenth solenoid valve 26 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→thirteenth solenoid valve 25→second refrigeration module 9→fourteenth one-way valve 39→cold end heat exchanger 13→twelfth one-way valve 37→first refrigeration module 8→fourteenth solenoid valve 26→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0108] In the fourth stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage, the third refrigeration module 10 is in the hot flow stage, and the fourth refrigeration module 11 is in the cold flow stage. The seventeenth solenoid valve 29 and the eighteenth solenoid valve 30 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→seventeenth solenoid valve 29→fourth refrigeration module 11→eighteenth one-way valve 43→cold end heat exchanger 13→sixteenth one-way valve 41→third refrigeration module 10→eighteenth solenoid valve 30→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0109] At this point, the four-stage cycle of a cycle is completed, and the subsequent cycle operation repeats this cycle process.

[0110] This embodiment facilitates the normal operation of the magnetic refrigeration system including four refrigeration modules 7 , and the refrigeration capacity of the magnetic refrigeration system can be adjusted by adjusting the number of cold storage devices 1 in the refrigeration module 7 .

[0111] Specifically, as the number of cold storage devices 1 and the number of refrigeration modules 7 in the refrigeration module 7 increase, the amount of magnetocaloric material filled in the refrigeration module 7 also increases, the refrigeration capacity of the magnetic refrigeration system also increases, and the flow length of the heat exchange fluid in the refrigeration module 7 also increases, thereby increasing the flow time and heat exchange time of the heat exchange fluid in the refrigeration module 7.

[0112] By changing the number of refrigeration modules 7 and the number of cold storage devices 1, the purpose of adjusting the refrigeration performance can be achieved without replacing the cold storage device 44, thereby enabling the magnetic refrigeration system to be flexibly changed according to load requirements or actual conditions, thereby enhancing the flexibility and adaptability of the magnetic refrigeration system.

[0113] Embodiment 1

[0114] like Figure 1 and Figure 2 As shown, this embodiment provides a cold accumulator 1, which includes a shell 2, on which two joints 3 are arranged, and the joints 3 can be connected to the pipeline; an inner cavity 4 and an inner flow channel are formed in the shell 2, and the inner cavity 4 is used to accommodate magnetocaloric material, and two first baffles 5 and two second baffles 6 are arranged on the inner flow channel, the first baffle 5 is used to control whether the joint 3 on the same side thereof is connected to the inner flow channel, and the second baffle 6 is used to control whether two inner flow channels of adjacent cold accumulators 1 are connected.

[0115] The cold storage tank 1 has two side walls, namely, a first side and a second side. The second side is in front of the first side in the counterclockwise direction. The first side of the cold storage tank 1 is provided with a first baffle plate 5 of the first side and a second baffle plate 6 of the first side, and the second side of the cold storage tank 1 is provided with a first baffle plate 5 of the second side and a second baffle plate 6 of the second side.

[0116] When the first baffle 5 on the first side and the first baffle 5 on the second side of the cold accumulator 1 are opened, and the second baffle 6 on the first side is closed and the second baffle 6 on the second side is closed, the heat exchange fluid in the pipeline enters the cold accumulator 1 through the first side joint 3, enters the inner flow channel through the first side first baffle 5, and after heating or cooling the magnetocaloric material in the inner cavity 4, flows out of the inner flow channel through the second side first baffle 5, and flows out of the cold accumulator 1 through the second side joint 3; or, the heat exchange fluid in the pipeline enters the cold accumulator 1 through the second side joint 3, enters the inner flow channel through the second side first baffle 5, and after heating or cooling the magnetocaloric material in the inner cavity 4, flows out of the inner flow channel through the first side first baffle 5, and flows out of the cold accumulator 1 through the first side joint 3.

[0117] When the first baffle 5 on the first side of the cold accumulator 1 is closed and the first baffle 5 on the second side is closed, and the second baffle 6 on the first side is opened and the second baffle 6 on the second side is opened, the heat exchange fluid enters the inner flow channel from the second baffle 6 on the first side of the cold accumulator 1 and flows out from the second baffle 6 on the second side; or, the heat exchange fluid enters the inner flow channel from the second baffle 6 on the second side of the cold accumulator 1 and flows out from the second baffle 6 on the first side; since the first baffle 5 on the first side is closed and the first baffle 5 on the second side is closed, the heat exchange fluid does not flow through the joint 3.

[0118] When the first baffle 5 on the first side of the cold accumulator 1 is opened and the first baffle 5 on the second side is closed, and the second baffle 6 on the first side is closed and the second baffle 6 on the second side is opened, the heat exchange fluid flows into the cold accumulator 1 from the first side joint 3, enters the inner flow channel through the first side first baffle 5, and flows out of the cold accumulator 1 from the second side second baffle 6; or, the heat exchange fluid flows into the cold accumulator 1 from the second side second baffle 6, enters the first side joint 3 through the first side first baffle 5, and flows out of the cold accumulator 1.

[0119] When the first baffle 5 on the first side of the cold accumulator 1 is closed and the first baffle 5 on the second side is opened, and the second baffle 6 on the first side is opened and the second baffle 6 on the second side is closed, the heat exchange fluid flows into the cold accumulator 1 from the second side joint 3, enters the inner flow channel through the second side first baffle 5, and flows out of the cold accumulator 1 from the first side second baffle 6 to enter the adjacent cold accumulator 1; or, the heat exchange fluid flows from the adjacent cold accumulator 1 through the first side second baffle 6 into the inner flow channel of the cold accumulator 1, then enters the second side joint 3 through the second side first baffle 5 and flows out of the cold accumulator 1.

[0120] The cold storage device 1 of this embodiment includes a baffle for controlling the flow direction of the heat exchange fluid, which is beneficial for the magnetic refrigeration system to change different combinations of refrigeration modules 7, thereby facilitating the switching of different heat exchange forms of the magnetic refrigeration system, and then facilitating the adjustment of the refrigeration capacity of the magnetic refrigeration system.

[0121] Embodiment 2

[0122] In this embodiment, the cold storage device 44 includes two refrigeration modules 7, which are connected in parallel between the hot-end heat exchanger 12 and the cold-end heat exchanger 13; when one refrigeration module 7 is in the demagnetization stage, the other refrigeration module 7 is in the magnetization stage.

[0123] like Fig. 9 As shown, the magnetic refrigeration system includes five solenoid valves, four one-way valves and two refrigeration modules 7. The five solenoid valves are respectively the first solenoid valve 18, the second solenoid valve 19, the third solenoid valve 20, the fourth solenoid valve 21 and the fifth solenoid valve 22. The four one-way valves are respectively the first one-way valve 32, the second one-way valve 33, the third one-way valve 34 and the fourth one-way valve 35. The two refrigeration modules 7 are respectively the first refrigeration module 8 and the second refrigeration module 9.

[0124] The working states of the first refrigeration module 8 and the second refrigeration module 9 are opposite when the magnetic refrigeration system is running, that is, when the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage; when the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage; when the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage; when the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage.

[0125] like Figures 3 to 5 As shown, the first refrigeration module 8 and the second refrigeration module 9 are centrally symmetrical.

[0126] Alternatively, if Figure 3 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include a cold storage device 1 .

[0127] Alternatively, if Figure 4 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include two cold storage devices 1 .

[0128] Alternatively, if Figure 5 As shown, the first refrigeration module 8 and the second refrigeration module 9 each include three cold storage devices 1 .

[0129] This is helpful for adjusting the refrigeration capacity of the magnetic refrigeration system. The more cold storage devices 1 there are in the refrigeration module 7, the stronger the refrigeration capacity of the magnetic refrigeration system.

[0130] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage, the first, second, third and fourth solenoid valves are all closed, and the fifth solenoid valve 22 is opened. At this time, the magnetic refrigeration system is in the internal circulation process.

[0131] In the second stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the first solenoid valve 18 and the second solenoid valve 19 are opened, and the third to fifth solenoid valves 22 are closed. The flow path of the heat exchange fluid is pump 14→cooler 16→first solenoid valve 18→first refrigeration module 8→first check valve 32→cold end heat exchanger 13→third check valve 34→second refrigeration module 9→second solenoid valve 19→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0132] In the third stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage, the first, second, third and fourth solenoid valves are all closed, and the fifth solenoid valve 22 is opened. At this time, the magnetic refrigeration system is in the internal circulation process.

[0133] In the fourth stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage, the first solenoid valve 18, the second solenoid valve 19 and the fifth solenoid valve 22 are closed, the third solenoid valve 20 and the fourth solenoid valve 21 are opened, and the flow path of the heat exchange fluid is pump 14→cooler 16→third solenoid valve 20→second refrigeration module 9→fourth one-way valve 35→cold end heat exchanger 13→second one-way valve 33→first refrigeration module 8→fourth solenoid valve 21→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0134] At this point, the four-stage cycle of a cycle is completed, and the subsequent cycle operation repeats this cycle process.

[0135] This embodiment is conducive to the normal operation of the magnetic refrigeration system including two refrigeration modules 7, and can adjust the refrigeration capacity of the magnetic refrigeration system by adjusting the number of cold storage devices 1 in the refrigeration module 7.

[0136] Embodiment 3

[0137] In this embodiment, the cold storage device 44 includes four refrigeration modules 7, and the four refrigeration modules 7 are connected in parallel between the hot end heat exchanger 12 and the cold end heat exchanger 13; the four refrigeration modules 7 are respectively a first refrigeration module 8, a second refrigeration module 9, a third refrigeration module 10 and a fourth refrigeration module 11; when the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage.

[0138] like Fig.10As shown, the magnetic refrigeration system includes nine solenoid valves, eight one-way valves and four refrigeration modules 7. The nine solenoid valves are respectively the eleventh solenoid valve 23, the twelfth solenoid valve 24, the thirteenth solenoid valve 25, the fourteenth solenoid valve 26, the fifteenth solenoid valve 27, the sixteenth solenoid valve 28, the seventeenth solenoid valve 29, the eighteenth solenoid valve 30 and the nineteenth solenoid valve. The eight one-way valves are respectively the eleventh one-way valve 36, the twelfth one-way valve 37, the thirteenth one-way valve 38, the fourteenth one-way valve 39, the fifteenth one-way valve 40, the sixteenth one-way valve 41, the seventeenth one-way valve 42 and the eighteenth one-way valve 43. The four refrigeration modules 7 are respectively the first refrigeration module 8, the second refrigeration module 9, the third refrigeration module 10 and the fourth refrigeration module 11.

[0139] The working states of the first refrigeration module 8 and the second refrigeration module 9 are opposite when the magnetic refrigeration system is running; and the working states of the third refrigeration module 10 and the fourth refrigeration module 11 are opposite when the magnetic refrigeration system is running.

[0140] like Figures 6 to 8 As shown, the first refrigeration module 8 and the second refrigeration module 9 are centrally symmetrical, and the third refrigeration module 10 and the fourth refrigeration module 11 are centrally symmetrical.

[0141] Alternatively, if Figure 6 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include a cold storage device 1 .

[0142] Alternatively, if Figure 7 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include two cold storage devices 1 .

[0143] Alternatively, if Figure 8 As shown, the first refrigeration module 8 , the second refrigeration module 9 , the third refrigeration module 10 and the fourth refrigeration module 11 each include three cold storage devices 1 .

[0144] This is helpful for adjusting the refrigeration capacity of the magnetic refrigeration system. The more the number of cold storage devices 1 in the refrigeration module 7 and the more the number of refrigeration modules 7 are, the stronger the refrigeration capacity of the magnetic refrigeration system is.

[0145] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage. The eleventh solenoid valve 23 and the twelfth solenoid valve 24 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→eleventh solenoid valve 23→first refrigeration module 8→eleventh one-way valve 36→cold end heat exchanger 13→thirteenth one-way valve 38→second refrigeration module 9→twelfth solenoid valve 24→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0146] In the first stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the cold flow stage, the second refrigeration module 9 is in the hot flow stage, the third refrigeration module 10 is in the demagnetization stage, and the fourth refrigeration module 11 is in the magnetization stage. The eleventh solenoid valve 23 and the twelfth solenoid valve 24 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→eleventh solenoid valve 23→first refrigeration module 8→eleventh one-way valve 36→cold end heat exchanger 13→thirteenth one-way valve 38→second refrigeration module 9→twelfth solenoid valve 24→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0147] In the second stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the magnetization stage, the second refrigeration module 9 is in the demagnetization stage, the third refrigeration module 10 is in the cold flow stage, and the fourth refrigeration module 11 is in the hot flow stage. The fifteenth solenoid valve 27 and the sixteenth solenoid valve 28 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→fifteenth solenoid valve 27→third refrigeration module 10→fifteenth one-way valve 40→cold end heat exchanger 13→seventeenth one-way valve 42→fourth refrigeration module 11→sixteenth solenoid valve 28→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0148] In the third stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the hot flow stage, the second refrigeration module 9 is in the cold flow stage, the third refrigeration module 10 is in the magnetization stage, and the fourth refrigeration module 11 is in the demagnetization stage. The thirteenth solenoid valve 25 and the fourteenth solenoid valve 26 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→thirteenth solenoid valve 25→second refrigeration module 9→fourteenth one-way valve 39→cold end heat exchanger 13→twelfth one-way valve 37→first refrigeration module 8→fourteenth solenoid valve 26→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0149] In the fourth stage of the operation cycle of the magnetic refrigeration system, the first refrigeration module 8 is in the demagnetization stage, the second refrigeration module 9 is in the magnetization stage, the third refrigeration module 10 is in the hot flow stage, and the fourth refrigeration module 11 is in the cold flow stage. The seventeenth solenoid valve 29 and the eighteenth solenoid valve 30 are open, and the other solenoid valves are closed. The flow path of the heat exchange fluid is: pump 14→cooler 16→seventeenth solenoid valve 29→fourth refrigeration module 11→eighteenth one-way valve 43→cold end heat exchanger 13→sixteenth one-way valve 41→third refrigeration module 10→eighteenth solenoid valve 30→hot end heat exchanger 12→exhaust tank 17→pump 14.

[0150] At this point, the four-stage cycle of a cycle is completed, and the subsequent cycle operation repeats this cycle process.

[0151] This embodiment is conducive to the normal operation of the magnetic refrigeration system including four refrigeration modules 7, and can adjust the refrigeration capacity of the magnetic refrigeration system by adjusting the number of cold storage devices 1 in the refrigeration module 7.

[0152] Specifically, as the number of cold storage devices 1 and the number of refrigeration modules 7 in the refrigeration module 7 increase, the amount of magnetocaloric material filled in the refrigeration module 7 also increases, the refrigeration capacity of the magnetic refrigeration system also increases, and the flow length of the heat exchange fluid in the refrigeration module 7 also increases, thereby increasing the flow time and heat exchange time of the heat exchange fluid in the refrigeration module 7.

[0153] By changing the number of refrigeration modules 7 and the number of cold storage devices 1, the purpose of adjusting the refrigeration performance can be achieved without replacing the cold storage device 44, thereby enabling the magnetic refrigeration system to be flexibly changed according to load requirements or actual conditions, thereby enhancing the flexibility and adaptability of the magnetic refrigeration system.

[0154] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships 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, and therefore cannot be understood as a limitation on the present invention.

[0155] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A cold storage device, characterized in that: An even number of cold storage devices are included, wherein the cold storage device includes a shell, wherein two joints are provided on the shell, and wherein the joints can be connected to a pipeline; wherein an inner cavity and an inner flow channel are formed in the shell, wherein the inner cavity is used to accommodate a magnetocaloric material, and wherein two first baffles and two second baffles are provided on the inner flow channel, wherein the first baffle is used to control whether the joint on the same side thereof is connected to the inner flow channel, and the second baffle is used to control whether two inner flow channels of adjacent cold storage devices are connected; The cold storage device comprises an even number of refrigeration modules, each refrigeration module comprises an equal number of the cold storage devices, and the cold storage devices in each refrigeration module are connected in sequence; The refrigeration module comprises a plurality of cold storage devices, the first baffles on the outer sides of the two cold storage devices at both ends are open and the second baffles are closed, the other first baffles of the refrigeration module are closed and the other second baffles of the refrigeration module are open.

2. The cold storage device according to claim 1, characterized in that: The first baffle plate is opened or closed by moving upward or downward to open or close, thereby opening or closing the fluid channel between the joint and the inner flow channel on the same side thereof, and two adjacent second baffle plates of adjacent cold storage devices are opened or closed by moving upward or downward together to open or close, thereby opening or closing the connection between the two inner flow channels of adjacent cold storage devices.

3. The cold storage device according to claim 1, characterized in that: The cold storage devices are connected in sequence to form a closed loop.

4. The cold storage device according to claim 3, characterized in that: An even number of refrigeration modules of the cold storage device are evenly distributed along the circumference of the cold storage device.

5. A magnetic refrigeration system, characterized in that: The invention comprises a cold storage device as claimed in any one of claims 1 to 4.

6. The magnetic refrigeration system according to claim 5, characterized in that: Also includes: A hot end heat exchanger, used to release the heat generated by the cold storage device to the outside of the area to be refrigerated; A cold end heat exchanger, used to release the cold energy generated by the cold storage device to the area to be refrigerated; A pump for driving a heat exchange fluid; Constant temperature tank, used to provide constant temperature cooling water; a cooler, for cooling the heat exchange fluid flowing out of the pump; and The exhaust tank is used to exhaust the gas generated during the operation of the magnetic refrigeration system.

7. The magnetic refrigeration system according to claim 6, characterized in that: The magnetic refrigeration system uses the refrigeration module of the cold storage device for refrigeration.

8. The magnetic refrigeration system according to claim 7, characterized in that: The cold storage device comprises two refrigeration modules, which are connected in parallel between the hot-end heat exchanger and the cold-end heat exchanger; when one refrigeration module is in a demagnetization stage, the other refrigeration module is in a magnetization stage.

9. The magnetic refrigeration system according to claim 7, characterized in that: The cold storage device includes four refrigeration modules, which are connected in parallel between the hot-end heat exchanger and the cold-end heat exchanger; the four refrigeration modules are respectively a first refrigeration module, a second refrigeration module, a third refrigeration module and a fourth refrigeration module; when the first refrigeration module is in a cold flow stage, the second refrigeration module is in a hot flow stage, the third refrigeration module is in a demagnetization stage, and the fourth refrigeration module is in a magnetization stage.

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