Magnetic refrigeration device

Abstract

The present application provides a magnetic refrigeration device. The magnetic refrigeration device includes a magnetic field generator and a regenerator bed (1). The magnetic field generator forms an annular magnetic field generation region, and the magnetic field generation region includes magnetizing regions and demagnetizing regions arranged alternately in the circumferential direction. At least two regenerator beds (1) are rotatably arranged in the magnetic field generation region and are arranged along the circumferential direction of the magnetic field generation region. The magnetic refrigeration device is provided with a hot air duct corresponding to the magnetizing region and a cold air duct corresponding to the demagnetizing region. The air flow exchanges heat with the regenerator bed (1) located in the magnetizing region in the hot air duct and exchanges heat with the regenerator bed (1) located in the demagnetizing region in the cold air duct. According to the magnetic refrigeration device of the present application, it can directly exchange heat with the air flow, eliminating the heat exchange fluid and its circuit, simplifying the structure of the magnetic refrigeration device, and reducing costs.

Description

Technical Field

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

[0002] A magnetic refrigeration device is a device that uses the physical properties of magnetocaloric materials for refrigeration. The technical basis of this device is the magnetocaloric effect of magnetocaloric materials, that is: when a changing magnetic field is applied to magnetocaloric materials, it will cause the temperature of the magnetocaloric materials to increase or decrease. When the magnetic field strength increases, the magnetic entropy of the material decreases, heat is released, and the temperature rises. When the magnetic field strength decreases, the magnetic entropy of the material increases, heat is absorbed, and the temperature drops. Therefore, a magnetic refrigeration device generally needs to have: a changing magnetic field, a magnetic regenerator (for placing magnetocaloric materials), a heat transfer fluid, a cold-end heat exchanger, a hot-end radiator, and supporting power components.

[0003] Since no refrigerant is required during the refrigeration / heating process and no other pollutants are generated, the magnetic refrigerator is a green and environmentally friendly refrigeration device and has the potential to replace vapor compression refrigeration. However, at present, magnetic refrigerators often have a complex structure, a large volume, and a large number of internal system components. It is necessary to use a heat transfer fluid to flow through the magnetocaloric bed to contact the magnetocaloric material inside and conduct heat exchange with it, and then flow through the heat exchanger to conduct heat exchange with the outside to heat / cool the outside. Therefore, fluid pipelines are required, the pipeline routing is complex, the arrangement of the whole machine components is messy, and the cost is relatively high. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a magnetic refrigeration device that can directly exchange heat with air flow, eliminate the heat transfer fluid and its loop, simplify the structure of the magnetic refrigeration device, and reduce the cost.

[0005] To solve the above problems, the present application provides a magnetic refrigeration device, including a magnetic field generator and a cold storage bed. The magnetic field generator forms an annular magnetic field generation area, and the magnetic field generation area includes magnetizing areas and demagnetizing areas arranged alternately along the circumferential direction. At least two cold storage beds are rotatably arranged in the magnetic field generation area and are arranged along the circumferential direction of the magnetic field generation area. The magnetic refrigeration device is provided with a hot air duct corresponding to the magnetizing area and a cold air duct corresponding to the demagnetizing area. The air flow exchanges heat with the cold storage bed located in the magnetizing area in the hot air duct and exchanges heat with the cold storage bed located in the demagnetizing area in the cold air duct.

[0006] Preferably, the magnetic field generator includes a magnetic yoke located at the center and an outer magnet located on the outer peripheral side of the cold storage bed. There is also a vacancy provided on the outer peripheral side of the cold storage bed. The outer magnet and the vacancy are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet and the magnetic yoke cooperate to form a magnetizing area, and the vacancy and the magnetic yoke cooperate to form a demagnetizing area.

[0007] Preferably, the magnetic field generator includes an inner magnet located at the center and an outer magnet located on the outer peripheral side of the cold storage bed. There is also a vacancy provided on the outer peripheral side of the cold storage bed. The outer magnet and the vacancy are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet and the inner magnet cooperate to form a magnetization region, and the vacancy and the inner magnet cooperate to form a demagnetization region.

[0008] Preferably, the outer magnet is a permanent magnet or a DC electromagnet.

[0009] Preferably, the inner magnet is annular, there are at least two outer magnets, the number of vacancies is the same as that of the outer magnets, and the outer magnets and the vacancies are arranged alternately along the circumferential direction.

[0010] Preferably, the magnetic refrigeration device further includes a housing, on which a cold air inlet, a cold air outlet, a hot air inlet and a hot air outlet are provided. The cold air inlet and the cold air outlet are connected to a cold air duct, and the hot air inlet and the hot air outlet are connected to a hot air duct.

[0011] Preferably, a driving mechanism is provided on the housing. The driving mechanism is fixedly connected to the inner magnet through a rotating shaft, and the cold storage bed is installed on the inner magnet.

[0012] Preferably, the housing includes a housing body and a first end cover provided at the first end of the housing body. A first outlet is provided on the first end cover, a connecting duct is provided on the first end cover, the connecting duct is communicated with the first outlet, and a first fan is provided in the connecting duct.

[0013] Preferably, an end panel is fixedly provided at the first end of the cold storage bed. The end panel is located between the first end cover and the cold storage bed. Openings corresponding to each cold storage bed are provided on the end panel, and an air flow passage for air flow to pass through is provided on the cold storage bed. The air flow passage is communicated with the openings.

[0014] Preferably, a sealing layer is provided between the end panel and the first end cover. A seal is formed between the first end cover and the end panel through the sealing layer.

[0015] Preferably, the sealing layer is fixed on the end panel, openings are provided on the sealing layer, and the openings on the sealing layer correspond to the openings on the end panel one by one; or, the sealing layer is fixed on the first end cover, openings are provided on the sealing layer, and the openings on the sealing layer correspond to the first outlet on the first end cover one by one.

[0016] Preferably, the housing further includes a bottom shell, the bottom shell is provided at the second end of the housing body, and a first inlet is further provided at the second end of the housing body. The first inlet is correspondingly communicated with the first outlet.

[0017] Preferably, a second outlet is provided at the second end of the housing body. The first outlet is connected to the hot air duct, the second outlet is connected to the cold air duct, a second inlet is provided at the position corresponding to the vacancy on the housing body, and the second inlet and the second outlet are connected to the cold air duct.

[0018] Preferably, when the housing includes a bottom case, an installation space is formed between the second end of the cold storage bed and the bottom case, and a second fan is installed in the installation space.

[0019] Preferably, the second outlet is located on the side wall of the housing, the first fan is an axial flow fan, and the second fan is a centrifugal fan.

[0020] Preferably, when a first inlet is provided at the second end of the housing, the first inlet and the second outlet are separated by an air duct partition.

[0021] Preferably, a flow-through channel for the airflow to pass through is provided on the cold storage bed, and the flow-through channel axially penetrates the cold storage bed.

[0022] Preferably, the cold storage bed includes a plurality of sheet-shaped magnetic working media arranged at intervals in the circumferential direction, and a flow-through channel is formed between adjacent sheet-shaped magnetic working media.

[0023] Preferably, the first end and / or the second end of the sheet-shaped magnetic working medium are fixedly connected together by connecting ribs.

[0024] Preferably, the connecting ribs are arranged at the radially outer edge of the sheet-shaped magnetic working medium.

[0025] The magnetic refrigeration device provided by the present application includes a magnetic field generator and a cold storage bed. The magnetic field generator forms an annular magnetic field generation region, and the magnetic field generation region includes magnetizing regions and demagnetizing regions arranged alternately in the circumferential direction. At least two cold storage beds are rotatably arranged in the magnetic field generation region and are arranged along the circumference of the magnetic field generation region. The magnetic refrigeration device is provided with a hot air duct corresponding to the magnetizing region and a cold air duct corresponding to the demagnetizing region. The air flow exchanges heat with the cold storage bed located in the magnetizing region in the hot air duct and exchanges heat with the cold storage bed located in the demagnetizing region in the cold air duct. In the magnetic refrigeration device of the present application, the magnetic working medium of the cold storage bed directly exchanges heat with the air flow to generate a refrigeration / heating effect, eliminating the heat exchange fluid and its circuit, streamlining the number of internal components of the unit, eliminating pipeline connections, making the arrangement of internal components neater and more beautiful. In addition, it effectively avoids the problem of fluid leakage, improves the reliability of the unit, and avoids the problem of the magnetic working medium being corroded by the fluid. Since the magnetic refrigeration device realizes the switching between refrigeration and heating by controlling the rotation of the cold storage bed, only by adjusting the rotation position of the cold storage bed, the alternately heated / cooled cold storage beds can always be in the air ducts with matching hot and cold states. Hot air always flows in the hot air duct, and cold air always flows in the cold air duct. There is no need for the magnet to rotate, nor for valve switching, and the control structure is simpler and the cost is lower. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the magnetic refrigeration device according to an embodiment of the present application;

[0027] Figure 2 isFigure 1 Schematic structural diagram in the A direction of

[0028] Figure 3 is Figure 1 Schematic cross-sectional structural diagram in the B-B direction of

[0029] Figure 4 is Figure 1 Schematic cross-sectional structural diagram in the C-C direction of

[0030] Figure 5 is Figure 2 Schematic cross-sectional structural diagram in the D-D direction of

[0031] Figure 6 is Figure 2 Schematic cross-sectional structural diagram in the E-E direction of

[0032] Figure 7 is Figure 5 Schematic enlarged partial structural diagram at F of

[0033] Figure 8 is Figure 6 Schematic enlarged partial structural diagram at G of

[0034] Figure 9 is Figure 1 Schematic cross-sectional structural diagram in the H-H direction of

[0035] Figure 10 Isometric view of the regenerator of the magnetic refrigeration device according to an embodiment of the present application.

[0036] The reference numerals are represented as:

[0037] 1, regenerator; 2, inner magnet; 3, outer magnet; 4, vacancy; 5, drive mechanism; 6, rotating shaft; 7, housing; 8, first end cover; 9, first outlet; 10, first inlet; 11, second outlet; 12, second inlet; 13, connecting air duct; 14, first fan; 15, second fan; 16, end panel; 17, flow-through channel; 18, sealing layer; 19, bottom case; 20, sheet-shaped magnetic working medium; 21, connecting rib; 22, air duct partition. Detailed implementation manners

[0038] Refer to in combination Figures 1 to 10As shown, according to an embodiment of the present application, a magnetic refrigeration device includes a magnetic field generator and a regenerator 1. The magnetic field generator forms an annular magnetic field generation region, and the magnetic field generation region includes magnetizing regions and demagnetizing regions arranged alternately in the circumferential direction. At least two regenerators 1 are rotatably arranged in the magnetic field generation region and are arranged along the circumferential direction of the magnetic field generation region. The magnetic refrigeration device is provided with a hot air duct corresponding to the magnetizing region and a cold air duct corresponding to the demagnetizing region. The air flow exchanges heat with the regenerator 1 located in the magnetizing region in the hot air duct and exchanges heat with the regenerator 1 located in the demagnetizing region in the cold air duct.

[0039] In the magnetic refrigeration device of the present application, the magnetic working medium of the regenerator 1 directly exchanges heat with the air flow to produce a refrigeration / heating effect, eliminating the heat exchange fluid and its circuit. The number of internal components of the unit is reduced, the pipeline connection is eliminated, and the arrangement of internal components is more tidy and beautiful. In addition, the problem of fluid leakage is effectively avoided, the reliability of the unit is improved, and the problem of the magnetic working medium being corroded by the fluid is avoided. Since the magnetic refrigeration device realizes the switching between refrigeration and heating by controlling the rotation of the regenerator 1, only by adjusting the rotation position of the regenerator 1, the alternately heating / cooling regenerator 1 can always be in the air duct with a matching hot / cold state, so that the regenerator 1 that is getting hot is always in the hot air duct, and the regenerator 1 that is getting cold is always in the cold air duct, allowing the magnetic working medium in the regenerator 1 to directly exchange heat with the air flow. Hot air always flows in the hot air duct, and cold air always flows in the cold air duct. There is no need for the magnet to rotate, nor for valve switching. The control structure is simpler, the complexity of the control program is reduced, and the cost is lower.

[0040] In one embodiment, the magnetic field generator includes a magnetic yoke located at the center and an outer magnet 3 located on the outer peripheral side of the regenerator 1. A vacancy 4 is also provided on the outer peripheral side of the regenerator 1. The outer magnet 3 and the vacancy 4 are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet 3 and the magnetic yoke cooperate to form a magnetizing region, and the vacancy 4 and the magnetic yoke cooperate to form a demagnetizing region. In this embodiment, the magnetic yoke is used as the central structure, so that it can cooperate with the outer magnet 3 to allow the magnetic field lines to pass through the magnetic yoke and form a magnetizing region in the region where the outer magnet 3 is located. Since there is no outer magnet 3 at the vacancy 4, no magnetic field will be generated, and a demagnetizing region can be formed in the region where the vacancy 4 is located. The vacancy 4 and the outer magnet 3 are arranged alternately in the circumferential direction, and alternately arranged magnetizing regions and demagnetizing regions can be formed along the circumference.

[0041] In one embodiment, the magnetic field generator includes an inner magnet 2 located at the center and an outer magnet 3 located on the outer peripheral side of the cold storage bed 1. A vacancy 4 is also provided on the outer peripheral side of the cold storage bed 1. The outer magnet 3 and the vacancy 4 are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet 3 and the inner magnet 2 cooperate to form a magnetization region, and the vacancy 4 and the inner magnet 2 cooperate to form a demagnetization region. In this embodiment, the inner magnet 2 located at the center can adopt an annular structure, which is convenient for the installation and fixation of the cold storage bed 1 on the inner magnet 2. The outer magnet 3 can interact with the magnetic field of the inner magnet 2 to form a magnetization region, while the region where the outer magnet 3 is not provided is the vacancy 4. The vacancy 4 cannot act together with the inner magnet 2 to generate a magnetic field. Therefore, a demagnetization region is formed in the region between the vacancy 4 and the inner magnet 2.

[0042] The outer magnet 3 is a permanent magnet or a DC electromagnet, which can form a stable magnetic field, so that the positions of the magnetization region and the demagnetization region formed between the outer magnet 3 and the magnetic yoke or the inner magnet 2 are fixed. Only by adjusting the rotation position of the cold storage bed 1 so that the cold storage bed 1 that is getting hot is always in the hot air duct and the cold storage bed 1 that is getting cold is always in the cold air duct, continuous refrigeration and heating can be achieved without adding a switching valve.

[0043] The inner magnet 2 is a permanent magnet or a DC electromagnet.

[0044] In one embodiment, the inner magnet 2 is annular, the number of the outer magnets 3 is at least two, the number of the vacancies 4 is the same as that of the outer magnets 3, and the lengths along the circumferential direction are the same. The outer magnets 3 and the vacancies 4 are arranged alternately along the circumferential direction. When adopting this structure, two magnetization regions are formed between the two outer magnets 3 and the inner magnet 2, and two demagnetization regions are formed between the two vacancies 4 and the inner magnet 2. Therefore, four cold storage beds 1 are required for alternating refrigeration or heating. When two cold storage beds 1 are in the magnetization region, the other two cold storage beds 1 are in the demagnetization region.

[0045] The four cold storage beds 1 are circumferentially evenly distributed and are driven to rotate by a rotating shaft 6 at the central position. The two outer magnets 3 are coaxially arranged with the cold storage beds 1 and are also circumferentially evenly distributed. Figure 3 As shown in the figure, two cold storage beds 1 rotate into the magnetic field region at a certain moment and become hot due to the magnetization effect. At this moment, the other two cold storage beds 1 leave the magnetic field region and become cold due to the demagnetization effect.

[0046] In one embodiment, the number of the outer magnets 3 can also be one. At this time, the number of the vacancies 4 is also one. Correspondingly, the number of the cold storage beds 1 is two. When one cold storage bed 1 is in the magnetization region, the other cold storage bed 1 is in the demagnetization region.

[0047] The magnetic refrigeration device further includes a housing, on which a cold air inlet, a cold air outlet, a hot air inlet and a hot air outlet are provided. The cold air inlet and the cold air outlet are communicated with a cold air duct, and the hot air inlet and the hot air outlet are communicated with a hot air duct. The magnetic field generator and the cold storage bed 1 are both located inside the housing. On the one hand, the housing can provide an installation space for the magnetic field generator and the cold storage bed 1. On the other hand, it can also provide protection for the magnetic field generator and the cold storage bed 1, and can also avoid heat loss and improve the energy utilization rate of the cold storage bed 1.

[0048] A driving mechanism 5 is provided on the housing. The driving mechanism 5 is fixedly connected to the inner magnet 2 through a rotating shaft 6. The cold storage bed 1 is installed on the inner magnet 2. The driving mechanism 5 is, for example, a motor, and can drive the inner magnet 2 to rotate by driving the rotating shaft 6 to rotate, and then drive the cold storage bed 1 to move circumferentially through the inner magnet 2, so that the cold storage bed 1 is alternately in the magnetization region and the demagnetization region, realizing alternating heating and cooling. The driving mechanism 5 is, for example, a servo motor.

[0049] The driving motor and the rotating shaft 6 can be connected through a coupling, which is convenient for realizing the connection and disassembly between the driving motor and the rotating shaft 6, and the assembly and disassembly efficiency is higher.

[0050] The four cold storage beds 1 and the inner magnet 2 located at the central position are rotated together by the rotating shaft 6, and the rotating shaft 6 is supported by a pair of upper and lower bearings. In this way, the outer magnets 3 fixed at both ends of the same diameter in the magnetic field generation region can alternately magnetize and demagnetize the four cold storage beds 1.

[0051] The cold storage bed 1 is provided with a flow-through channel 17 for the air flow to pass through. The flow-through channel 17 axially penetrates the cold storage bed 1. The flow-through channel 17 allows the air flow to pass through the magnetic working medium of the cold storage bed 1 and exchange heat with the magnetic working medium. In order to ensure the maximum heat exchange effect, the flow-through channel 17 extends from the first end to the second end of the cold storage bed 1, so that the air flow can flow through the cold storage bed 1 with the maximum flow path and exchange heat fully with the cold storage bed 1.

[0052] Refer to in combination Figure 10As shown in the figure, in this embodiment, the cold storage bed 1 includes a plurality of sheet-shaped magnetic working media 20 arranged at intervals in the circumferential direction. An overflow channel 17 is formed between adjacent sheet-shaped magnetic working media 20. The cold storage bed 1 is of an open design with a hollow bottom. Inside, there are a number of sheet-shaped magnetic working media 20 placed vertically and arranged at equal intervals. A fan-shaped or rectangular overflow channel 17 is formed between two adjacent sheet-shaped magnetic working media 20. Since the sheet-shaped magnetic working media 20 adopt a thin plate structure, it can ensure sufficient contact between the air flow and the sheet-shaped magnetic working media 20, and at the same time reduce the flow resistance of the sheet-shaped magnetic working media 20 to the air flow. In this way, the air flow can smoothly pass through the cold storage bed 1 and exchange heat with the magnetic working media. An arc-shaped plate fixedly matched with the inner magnet 2 is arranged on the radially inner circumferential side of the cold storage bed 1. The sheet-shaped magnetic working media 20 are arranged on the outer circumferential side of the arc-shaped plate, forming a finned structure, which can exchange heat with the air flow more efficiently. The sheet-shaped magnetic working media 20 are fixedly connected together through the arc-shaped plate, which can also enhance the overall structure of the cold storage bed 1. The cold storage bed 1 can adopt an integrally formed structural form, thereby improving the overall structural strength of the cold storage bed 1.

[0053] The first end and / or the second end of the sheet-shaped magnetic working media 20 in the axial direction are fixedly connected together through connecting ribs 21, and all the sheet-shaped magnetic working media 20 belonging to the same cold storage bed 1 can be connected together from both ends of the sheet-shaped magnetic working media 20, enhancing the structural strength of the cold storage bed 1.

[0054] In one embodiment, the connecting ribs 21 are arranged at the radially outer edge of the sheet-shaped magnetic working media 20. Since the radially inner edges of the sheet-shaped magnetic working media 20 are fixedly connected together through the arc-shaped plate, by arranging the connecting ribs 21 at the radially outer edge of the sheet-shaped magnetic working media 20, all the sheet-shaped magnetic working media 20 can be fixedly connected together from both the radial inner and outer sides of the sheet-shaped magnetic working media 20, thus effectively ensuring the structural strength and working stability of the cold storage bed 1.

[0055] The outer shell includes a housing 7 and a first end cover 8 arranged at the first end of the housing 7. A first outlet 9 is opened on the first end cover 8. A connecting air duct 13 is arranged on the first end cover 8, and the connecting air duct 13 is communicated with the first outlet 9. A first fan 14 is arranged in the connecting air duct 13. The first fan 14 is arranged at the first outlet 9, and can be connected with the first outlet 9 through the connecting air duct 13, which is convenient for leading out the air from the first outlet 9 and sending it to the indoor or outdoor. The first fan 14 of the present application is arranged outside the first end cover 8, that is, outside the outer shell, so it does not occupy the space inside the outer shell and does not occupy the internal air duct, making the overall structure more compact, the air duct smoother, and improving the heat exchange efficiency. The first outlet 9 here can be a hot air outlet or a cold air outlet, which can be selected according to needs. The first fan 14 is, for example, an axial flow fan.

[0056] The first end of the cold storage bed 1 is fixedly provided with an end panel 16. The end panel 16 is located between the first end cover 8 and the cold storage bed 1. Openings corresponding to each cold storage bed 1 are provided on the end panel 16. An air flow passage 17 for the air flow to pass through is provided on the cold storage bed 1, and the air flow passage 17 communicates with the openings. After the air flow enters the magnetic refrigeration device from the outside, it exchanges heat with the magnetic working medium of the cold storage bed 1 during the process of flowing through the air flow passage 17. The air flow after exchanging heat with the cold storage bed 1 can enter the opening along the air flow passage 17, and then enter the first outlet 9 from the opening, and then be sent out of the magnetic refrigeration device. The end panel 16 can play a role in separating each cold storage bed 1, so that air leakage does not occur between the cold storage beds 1, and the heat exchange efficiency is improved.

[0057] In one embodiment, end panels 16 are respectively provided at the first end and the second end of the cold storage bed 1, so that the air flow can only pass through via the air flow passage 17, can fully exchange heat with the cold storage bed 1, effectively improve the air flow efficiency, and improve the heat exchange efficiency between the air flow and the cold storage bed 1.

[0058] A sealing layer 18 is provided between the end panel 16 and the first end cover 8. A seal is formed between the first end cover 8 and the end panel 16 through the sealing layer 18, which can improve the sealing performance between the end of the cold storage bed 1 and the first end cover 8.

[0059] In one embodiment, the sealing layer 18 is fixed on the end panel 16, and openings are provided on the sealing layer 18. The openings on the sealing layer 18 correspond to the openings on the end panel 16 one by one.

[0060] In one embodiment, the sealing layer 18 is fixed on the first end cover 8, and openings are provided on the sealing layer 18. The openings on the sealing layer 18 correspond to the first outlet 9 on the first end cover 8 one by one.

[0061] No matter on which structure the sealing layer 18 is arranged, the sealing performance between the first end cover 8 and the end panel 16 can be ensured. The sealing layer 18 is, for example, a sealing felt, and the first outlet is, for example, a hot air outlet.

[0062] The first end cover 8, the sealing felt, and the end panel 16 are in mutual extrusion contact, and the sealing effect is generated by using the extrusion and rebound characteristics of the sealing felt. During the operation of the unit, the end panel 16 is fixedly connected to the four cold storage beds 1 and rotates together with the cold storage beds 1, and there is no gap between them. Openings with dimensions matching those of the cold storage beds 1 are left at the positions of the end panel 16 facing the four cold storage beds 1, and the air flow can flow out from there. The end panel 16 is fixedly connected to the sealing felt together, and air outlets that overlap each other are provided directly above the magnetic field region of the two, so as to avoid the sealing felt from blocking the openings on the end panel 16 and ensure that the air flow can flow smoothly.

[0063] The housing further includes a bottom case 19 which is disposed at the second end of the housing 7. A first inlet 10 is also provided at the second end of the housing 7, and the first inlet 10 is correspondingly communicated with the first outlet 9. In this embodiment, the first inlet 10, the first outlet 9 are communicated with the hot air duct of the cold storage bed 1 located in the magnetization region. The air flow enters from the first inlet 10, exchanges heat in the flow-through channel 17 of the cold storage bed 1, then enters the connecting duct 13 from the first outlet 9, and is sent out from the outlet of the connecting duct 13 under the action of the axial flow fan.

[0064] When the two cold storage beds 1 entering the magnetization region become hot, the openings on the first end cover 8 coincide with the air outlets of the sealing felt and the end panel 16. In this way, these two cold storage beds 1 communicate with the outside to form a hot air duct. Under the action of the axial flow fan located at the first outlet 9, the air flow enters the unit from the air inlet of the air inlet and outlet grille at the bottom, flows in the direction of the arrow, exchanges heat with the cold storage bed 1, then continues to flow vertically upward, and is then blown out of the unit from the first outlet 9 at the top and connected to the outdoor side air outlet through the air duct and introduced to the outside.

[0065] A second outlet 11 is provided at the second end of the housing 7. The first outlet 9 is communicated with the hot air duct, and the second outlet 11 is communicated with the cold air duct. A second inlet 12 is provided at the position corresponding to the vacancy 4 on the housing 7, and the second inlet 12 and the second outlet 11 are communicated with the cold air duct. In this embodiment, the second inlet 12, the second outlet 11 are communicated with the cold air duct of the cold storage bed 1 located in the demagnetization region. The air flow enters from the second inlet 12, exchanges heat in the flow-through channel 17 of the cold storage bed 1, and then is blown out from the second outlet 11 into the room.

[0066] When the housing includes the bottom case 19, an installation space is formed between the second end of the cold storage bed 1 and the bottom case 19, and a second fan 15 is installed in the installation space. The second fan 15 is, for example, a centrifugal fan.

[0067] In one embodiment, the second outlet 11 is located on the side wall of the housing 7, the first fan 14 is an axial flow fan, and the second fan 15 is a centrifugal fan.

[0068] When the first inlet 10 is provided at the second end of the housing 7 and the first inlet 10 is located on the side wall of the housing 7, the first inlet 10 and the second outlet 11 are separated by an air duct partition 22.

[0069] In this embodiment, for the hot air duct, the airflow enters the shell 7 from the first inlet 10 on the second end side wall of the shell 7, then flows upward in the vertical direction, flows through the flow channel 17 of the cold storage bed 1 located in the magnetized area, and then enters the connecting air duct 13 where the axial flow fan is located from the first outlet 9 at the top, and then is discharged to the outside along the air duct from the connecting air duct 13 at the top. For the cold air duct, the airflow enters the flow channel 17 of the cold storage bed 1 located in the demagnetized area from the second inlet 12 corresponding to the vacancy 4 through the vacancy 4, exchanges heat with the cold storage bed 1, then flows downward, enters the centrifugal fan, and then is blown into the room from the second outlet 11 located on the second end side wall of the shell 7 under the action of the centrifugal fan.

[0070] In this embodiment, the cold air duct and the hot air duct are arranged alternately along the circumferential direction, and the two adjacent cold air ducts are 90° apart, and the two adjacent hot air ducts are also 90° apart. Grilles are provided at the inlet and outlet positions. There is a duct partition 22 and a sealing felt barrier between the first inlet 10 and the second outlet 11, so that the hot air duct and the cold air duct can be isolated from each other, with good sealing and heat preservation, so that the cold and hot air will not mix, and the cold and hot air ducts can work independently of each other.

[0071] As for the cold air duct, since there is no air outlet at the position corresponding to the cold air duct on the first end cover 8, the opening of the end panel 16 directly above the two cold storage beds 1 in the demagnetization area is staggered with the sealing felt and the air outlet on the first end cover 8, and no air flows through. Therefore, under the action of the centrifugal fans on the left and right sides of the bottom of the shell, the air enters the unit through the air inlet grille, flows in the direction of the arrow, exchanges heat with the magnetic working medium through the cold storage bed 1, and finally blows out of the unit from the grille at the second outlet 11 at the bottom to cool the room.

[0072] The magnetic refrigerator of the present application can realize direct heat exchange between the magnetic working fluid and the outside air, avoid the use of heat exchange fluid, save a whole set of heat exchange circuit components, reduce the cost of the whole machine, and be more energy-saving and environmentally friendly, which will be conducive to the product promotion of magnetic refrigerators.

[0073] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0074] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A magnetic refrigeration device, characterized in that, It includes a magnetic field generator and a cold storage bed (1). The magnetic field generator forms an annular magnetic field generation region, and the magnetic field generation region includes magnetizing regions and demagnetizing regions arranged alternately in the circumferential direction. At least two cold storage beds (1) are rotatably arranged in the magnetic field generation region and are arranged along the circumferential direction of the magnetic field generation region. The magnetic refrigeration device is provided with a hot air duct corresponding to the magnetizing region and a cold air duct corresponding to the demagnetizing region. The air flow exchanges heat with the cold storage bed (1) located in the magnetizing region in the hot air duct and exchanges heat with the cold storage bed (1) located in the demagnetizing region in the cold air duct. An air flow passage (17) for the air flow to pass through is provided on the cold storage bed (1), and the air flow passage (17) axially penetrates the cold storage bed (1).

2. The magnetic refrigeration device according to claim 1, characterized in that, The magnetic field generator includes a magnetic yoke at the center and an outer magnet (3) on the outer peripheral side of the cold storage bed (1). A vacancy (4) is also provided on the outer peripheral side of the cold storage bed (1). The outer magnet (3) and the vacancy (4) are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet (3) and the magnetic yoke cooperate to form the magnetizing region, and the vacancy (4) and the magnetic yoke cooperate to form the demagnetizing region.

3. The magnetic refrigeration device according to claim 1, wherein, The magnetic field generator includes an inner magnet (2) at the center and an outer magnet (3) on the outer peripheral side of the cold storage bed (1). A vacancy (4) is also provided on the outer peripheral side of the cold storage bed (1). The outer magnet (3) and the vacancy (4) are arranged in sequence along the circumferential direction of the magnetic field generator. The outer magnet (3) and the inner magnet (2) cooperate to form the magnetizing region, and the vacancy (4) and the inner magnet (2) cooperate to form the demagnetizing region.

4. The magnetic refrigeration device according to claim 2 or 3, characterized in that, The outer magnet (3) is a permanent magnet or a DC electromagnet.

5. The magnetic refrigeration device according to claim 3, characterized in that The inner magnet (2) is annular, there are at least two outer magnets (3), the number of vacancies (4) is the same as that of the outer magnets (3), and the outer magnets (3) and the vacancies (4) are arranged alternately in the circumferential direction.

6. The magnetic refrigeration device according to claim 3, wherein The magnetic refrigeration device further includes a housing. A cold air inlet, a cold air outlet, a hot air inlet, and a hot air outlet are provided on the housing. The cold air inlet and the cold air outlet are communicated with the cold air duct, and the hot air inlet and the hot air outlet are communicated with the hot air duct.

7. The magnetic refrigeration device according to claim 6, wherein A driving mechanism (5) is provided on the housing. The driving mechanism (5) is fixedly connected to the inner magnet (2) through a rotating shaft (6), and the cold storage bed (1) is installed on the inner magnet (2).

8. The magnetic refrigeration device according to claim 6, characterized in that, The housing includes a housing body (7) and a first end cover (8) provided at the first end of the housing body (7). A first outlet (9) is opened on the first end cover (8). A connecting air duct (13) is provided on the first end cover (8), and the connecting air duct (13) is communicated with the first outlet (9). A first fan (14) is provided in the connecting air duct (13).

9. The magnetic refrigeration device according to claim 8, characterized in that, An end panel (16) is fixedly arranged at the first end of the cold storage bed (1). The end panel (16) is located between the first end cover (8) and the cold storage bed (1). Openings are provided on the end panel (16) corresponding to each of the cold storage beds (1). An air flow passage (17) for air flow to pass through is provided on the cold storage bed (1), and the air flow passage (17) is communicated with the openings.

10. The magnetic refrigeration device according to claim 9, characterized in that, A sealing layer (18) is provided between the end panel (16) and the first end cover (8). A seal is formed between the first end cover (8) and the end panel (16) through the sealing layer (18).

11. The magnetic refrigeration device according to claim 10, characterized in that, The sealing layer (18) is fixed on the end panel (16), and openings are provided on the sealing layer (18). The openings on the sealing layer (18) correspond to the openings on the end panel (16) one by one; or, the sealing layer (18) is fixed on the first end cover (8), and openings are provided on the sealing layer (18). The openings on the sealing layer (18) correspond to the first outlets (9) on the first end cover (8) one by one.

12. The magnetic refrigeration device according to claim 8, characterized in that, The outer shell further includes a bottom shell (19). The bottom shell (19) is arranged at the second end of the shell (7). A first inlet (10) is further provided at the second end of the shell (7), and the first inlet (10) is correspondingly communicated with the first outlet (9).

13. The magnetic refrigeration device according to any one of claims 8 to 12, characterized in that, A second outlet (11) is provided at the second end of the shell (7). The first outlet (9) is communicated with the hot air duct, and the second outlet (11) is communicated with the cold air duct. A second inlet (12) is provided at the position corresponding to the vacancy (4) on the shell (7), and the second inlet (12), the second outlet (11) are communicated with the cold air duct.

14. The magnetic refrigeration device according to claim 13, wherein, When the outer shell includes a bottom shell (19), an installation space is formed between the second end of the cold storage bed (1) and the bottom shell (19), and a second fan (15) is installed in the installation space.

15. The magnetic refrigeration device according to claim 14, characterized in that, The second outlet (11) is located on the side wall of the shell (7). The first fan (14) is an axial flow fan, and the second fan (15) is a centrifugal fan.

16. The magnetic refrigeration device according to claim 13, characterized in that, When a first inlet (10) is provided at the second end of the shell (7), the first inlet (10) and the second outlet (11) are separated by an air duct partition (22).

17. The magnetic refrigeration device according to claim 1, wherein, The cold storage bed (1) includes a plurality of sheet-shaped magnetic working media (20) arranged at intervals in the circumferential direction. The air flow passage (17) is formed between adjacent sheet-shaped magnetic working media (20).

18. The magnetic refrigeration device according to claim 17, characterized in that, The first end and / or the second end of the sheet-shaped magnetic working medium (20) are fixedly connected together through connecting ribs (21).

19. The magnetic refrigeration device according to claim 18, wherein, The connecting ribs (21) are arranged at the radial outer edge of the sheet-shaped magnetic working medium (20).

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