CN213631055U - Magnetic refrigerating device - Google Patents
Magnetic refrigerating device Download PDFInfo
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- CN213631055U CN213631055U CN202022513034.4U CN202022513034U CN213631055U CN 213631055 U CN213631055 U CN 213631055U CN 202022513034 U CN202022513034 U CN 202022513034U CN 213631055 U CN213631055 U CN 213631055U
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Abstract
The present application provides a magnetic refrigeration device. This magnetic refrigeration device includes magnetic field generator, first magnetocaloric unit, second magnetocaloric unit and actuating mechanism, first magnetocaloric unit includes first magnetocaloric material, second magnetocaloric unit includes second magnetocaloric material, the curie temperature of first magnetocaloric material is different with the curie temperature of second magnetocaloric material, actuating mechanism is configured to the relative position between first magnetocaloric unit of adjustment and second magnetocaloric unit and the magnetic field generator, so that first magnetocaloric unit is located magnetic field generator's working area, second magnetocaloric unit is located magnetic field generator's working area outside, or make first magnetocaloric unit be located magnetic field generator's working area outside, second magnetocaloric unit is located magnetic field generator's working area inside. According to the magnetic refrigeration device, the magnetocaloric materials can be switched as required, so that the magnetocaloric materials in the access system are in a better working state, and the working performance of the magnetic refrigeration device is guaranteed.
Description
Technical Field
The application relates to the technical field of magnetic refrigeration, in particular to a magnetic refrigeration device.
Background
A magnetic refrigeration apparatus is a device for refrigerating using physical properties of a magnetocaloric material, and the technical basis of the apparatus is the magnetocaloric effect of the magnetocaloric material, namely: when a changing magnetic field is applied to the magnetocaloric material, the temperature of the magnetocaloric material is increased or decreased, the magnetic entropy of the material is decreased when the magnetic field strength is increased, heat is released, the temperature is increased, and the magnetic entropy of the material is increased when the magnetic field strength is decreased, heat is absorbed, and the temperature is decreased. A magnetic refrigeration device is therefore generally required to have: the device comprises a variable magnetic field, a magnetic heat regenerator (used for placing magnetocaloric materials), a heat transfer fluid, a cold-end heat exchanger, a hot-end heat radiator and a matched power component.
The adiabatic temperature of the heat-insulating material in the regenerator is the biggest at its curie temperature, and the magnetocaloric effect is strongest, and the heat-insulating material of the heat-insulating material deviates from curie temperature department, and the magnetocaloric effect reduces, and when the regenerator was only filled a kind of heat-insulating material, the temperature of cold-insulating bed striden less, consequently striden for the temperature that improves the regenerator, should fill multiple magnetocaloric material in the regenerator, from the hot junction to the cold junction of regenerator, the curie temperature of the heat-insulating material reduces gradually.
The magnetic material is filled in the magnetic material magnetizing and demagnetizing area in the regenerator, the mass of the fluid flowing through the magnetic material area in the regenerator is not larger and better, the mass value of the fluid is related to the temperature span and the operating condition set by the magnetic refrigeration system, the pressure loss of the fluid flowing through the magnetic material is large, the power consumption of the piston is large, and when the length of the fluid flowing through the magnetic material area is longer, the pressure loss is larger, the power consumption of the piston is larger, and the energy efficiency of the fluid is lower. Therefore, when the magnetic refrigeration system is operated, the appropriate quality of the magnetocaloric material is determined according to the temperature span and the operating conditions of the magnetic refrigeration system.
In the known technology, the magnetocaloric materials in the magnetic refrigerator are fixed after being assembled, and the adjustment of the magnetocaloric materials cannot be performed according to the actual working environment temperature and the target temperature where the magnetic refrigeration system is located, so that the magnetic refrigeration system performs heat exchange by using all the preset magnetocaloric materials in any working state, which can cause that part of the magnetocaloric materials work at poor environment temperature, the magnetocaloric effect of the system is poor, and the overall refrigeration performance of the magnetic refrigeration system is poor.
SUMMERY OF THE UTILITY MODEL
Therefore, an object of the present invention is to provide a magnetic refrigeration device, which can switch magnetocaloric materials as required, so that the magnetocaloric materials in an access system are in a better working state, and the working performance of the magnetic refrigeration device is ensured.
In order to solve the above problem, the present application provides a magnetic refrigeration device, including magnetic field generator, first magnetocaloric unit, second magnetocaloric unit and drive mechanism, first magnetocaloric unit includes first magnetocaloric material, second magnetocaloric unit includes second magnetocaloric material, the curie temperature of first magnetocaloric material is different with the curie temperature of second magnetocaloric material, drive mechanism is configured to adjust the relative position between first magnetocaloric unit and second magnetocaloric unit and the magnetic field generator, so that first magnetocaloric unit is located the work area of magnetic field generator, second magnetocaloric unit is located the work area of magnetic field generator, or make first magnetocaloric unit be located the work area of magnetic field generator, second magnetocaloric unit is located the work area of magnetic field generator.
Preferably, the working area of the magnetic field generator is an annular area, the first and second magnetocaloric units are both in an annular structure and are arranged along the axial direction of the annular area, and the first and second magnetocaloric units can move relative to the magnetic field generator along the axial direction of the annular area.
Preferably, the first magnetocaloric unit is filled with a single magnetocaloric material, the second magnetocaloric unit is filled with at least two magnetocaloric materials with different curie temperatures, and the different magnetocaloric materials in the second magnetocaloric unit are arranged along the circumferential direction.
Preferably, the driving mechanism includes a first support and an actuator, the actuator is mounted on the first support, the first magnetocaloric unit is fixedly connected to the second magnetocaloric unit, and the actuator is in driving connection with the first magnetocaloric unit, or the actuator is in driving connection with the second magnetocaloric unit.
Preferably, the actuator comprises a telescopic mechanism, and the tail end of the telescopic mechanism is fixedly connected with the first magnetocaloric unit through a connecting piece; or the actuator comprises a driving screw rod, a nut sleeve is sleeved on the driving screw rod and fixedly connected with the first magnetic heat unit through a connecting piece, and the driving screw rod drives the first magnetic heat unit to move along the axial direction of the first magnetic heat unit through the nut sleeve.
Preferably, the first magnetocaloric unit is divided into a plurality of magnetic regenerators along the circumferential direction, two ends of each magnetic regenerator are respectively provided with a fluid interface, and the magnetocaloric materials in each magnetic regenerator are the same.
Preferably, the number of magnetic regenerators is the same as the sum of the number of magnetized and demagnetized regions of the magnetic field generator, each magnetic regenerator corresponding to one magnetized or demagnetized region.
Preferably, the second magnetocaloric unit is divided into a plurality of magnetic regenerators along the circumferential direction, two ends of each magnetic regenerator are respectively provided with a fluid interface, and the curie temperatures of the magnetocaloric materials in the magnetic regenerators in the magnetizing region are different; and/or the curie temperature of the magnetocaloric material in the magnetic regenerator that is located at the same time in the demagnetization zone.
Preferably, the second magnetocaloric unit is divided into a plurality of magnetic regenerators along the circumferential direction, two ends of each magnetic regenerator are respectively provided with a fluid interface, the structures of the magnetic regenerators are the same, and at least two magnetocaloric materials with different curie temperatures are sequentially arranged in a single magnetic regenerator along the circumferential direction.
Preferably, the magnetocaloric materials of at least two different curie temperatures increase in curie temperature along the circumference of the second magnetocaloric unit or the magnetocaloric materials of at least two different curie temperatures decrease in curie temperature along the circumference of the second magnetocaloric unit.
Preferably, the magnetic regenerator is fan-shaped, liquid distribution cavities are respectively arranged at two ends of the magnetic regenerator along the circumferential direction, the fluid interface is communicated with the liquid distribution cavities, and the magnetocaloric material is filled between the liquid distribution cavities at the two ends of the magnetic regenerator along the circumferential direction.
Preferably, a filter screen plate is arranged between the liquid distribution chamber and the magnetocaloric material.
Preferably, the first and second magnetocaloric units are separated by a partition.
Preferably, the topography of the magnetocaloric material filled in the first magnetocaloric unit and the second magnetocaloric unit is different.
Preferably, the magnetocaloric material filled in the first magnetocaloric unit is in the form of particles and the magnetocaloric material filled in the second magnetocaloric unit is in the form of plates.
Preferably, the magnetic field generator comprises a stator assembly and a rotor assembly, the rotor assembly being rotatable relative to the first and second magnetocaloric units, the rotor assembly being rotatable relative to the stator assembly to generate the varying magnetic field.
Preferably, the driving mechanism is installed on the stator assembly, the stator assembly is further installed with a second support, the second support is provided with a rotation driver, and the rotation driver is in driving connection with the rotor assembly and drives the rotor assembly to rotate relative to the first magnetocaloric unit and the second magnetocaloric unit.
Preferably, the magnetic field generator is an electromagnetic ferromagnetic field generator that generates a varying magnetic field by varying an electric current.
The utility model provides a magnetic refrigeration device, including magnetic field generator, first magnetocaloric unit, second magnetocaloric unit and actuating mechanism, first magnetocaloric unit includes first magnetocaloric material, second magnetocaloric unit includes second magnetocaloric material, the curie temperature of first magnetocaloric material is different with the curie temperature of second magnetocaloric material, actuating mechanism is configured to the relative position between first magnetocaloric unit of adjustment and second magnetocaloric unit and the magnetic field generator, so that first magnetocaloric unit is located magnetic field generator's work area, second magnetocaloric unit is located magnetic field generator's work area outside, or make first magnetocaloric unit be located magnetic field generator's work area outside, second magnetocaloric unit is located magnetic field generator's work area. This magnetic refrigeration device can adjust the working position of first magnetocaloric unit and second magnetocaloric unit according to the operating condition, make the magnetocaloric material that is located in magnetic field generator's working area change, through switching the magnetocaloric material that is located in magnetic field generator's working area, make the magnetocaloric material that is located in magnetic field generator's working area different under the different operating condition, thereby make the magnetocaloric material that is in working condition can be in best working condition, can guarantee magnetic refrigeration device's working property.
Drawings
Fig. 1 is a perspective view of a magnetic refrigerator according to an embodiment of the present application;
FIG. 2 is an exploded view of a magnetic refrigeration unit according to an embodiment of the present application;
FIG. 3 is a cross-sectional structural view of a magnetic refrigeration apparatus according to an embodiment of the present application at a position where a magnetic field generator is engaged with a magnetocaloric unit;
FIG. 4 is a cross-sectional structural view of a magnetic refrigeration unit according to an embodiment of the present application;
fig. 5 is an exploded structural view of a magnetic regenerator of a magnetic refrigeration apparatus according to an embodiment of the present application;
fig. 6 is a partial sectional view of a second magnetocaloric unit of a magnetic refrigeration apparatus according to an embodiment of the present application.
The reference numerals are represented as:
1. a magnetic field generator; 2. a first magnetocaloric unit; 3. a second magnetocaloric unit; 4. a first bracket; 5. an actuator; 6. a drive screw; 7. a nut sleeve; 8. a connecting member; 9. a magnetic regenerator; 10. a fluid interface; 11. a liquid distribution cavity; 12. a filter screen plate; 13. a magnetocaloric material; 14. a stator assembly; 15. a rotor assembly; 16. a second bracket; 17. a rotation driver; 18. a separator.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present application, a magnetic refrigeration apparatus includes a magnetic field generator 1, a first magnetocaloric unit 2, a second magnetocaloric unit 3, the first magnetocaloric unit 2 includes a first magnetocaloric material, the second magnetocaloric unit 3 includes a second magnetocaloric material, a curie temperature of the first magnetocaloric material is different from a curie temperature of the second magnetocaloric material, and a driving mechanism is configured to adjust relative positions between the first magnetocaloric unit 2 and the second magnetocaloric unit 3 and the magnetic field generator 1, so that the first magnetocaloric unit 2 is located in a working area of the magnetic field generator 1, the second magnetocaloric unit 3 is located outside the working area of the magnetic field generator 1, or the first magnetocaloric unit 2 is located outside the working area of the magnetic field generator 1, and the second magnetocaloric unit 3 is located in the working area of the magnetic field generator 1.
This magnetic refrigeration device can adjust the working position of first magnetocaloric unit 2 and second magnetocaloric unit 3 according to the operating condition, make the magnetocaloric material 13 that is located in the working area of magnetic field generator 1 change, switch the magnetocaloric material 13 that is located in the working area of magnetic field generator 1, make the magnetocaloric material 13 that is located in the working area of magnetic field generator 1 different under different operating conditions, thereby make the curie temperature of the magnetocaloric material 13 that is located in the working area can match with the ambient temperature under the operating condition, the magnetocaloric material 13 that is in operating condition can be in the best operating condition, can guarantee magnetic refrigeration device's working property.
In one embodiment, the working area of the magnetic field generator 1 is an annular area, the first and second magnetocaloric units 2 and 3 are both in an annular structure and are arranged along the axial direction of the annular area, and the first and second magnetocaloric units 2 and 3 are capable of moving relative to the magnetic field generator 1 along the axial direction of the annular area. The working region of the magnetic field generator 1 is set to be an annular region, so that the magnetizing or demagnetizing operation of the first or second magnetocaloric unit 2 or 3 can be performed by controlling the magnetic field region in the circumferential direction. Meanwhile, since the working area is an annular area, when the positions of the first and second magnetocaloric units 2 and 3 are switched, only the first and second magnetocaloric units 2 and 3 need to move axially by the thickness of one magnetocaloric unit with respect to the magnetic field generator 1, and the position switching of the first and second magnetocaloric units 2 and 3 can be completed, so that the cylindrical magnetic refrigeration device can have a smaller axial dimension, and the operation is simpler and more convenient.
In one embodiment, the first magnetocaloric unit 2 is filled with a single magnetocaloric material 13, the second magnetocaloric unit 3 is filled with at least two magnetocaloric materials 13 having different curie temperatures, and the different magnetocaloric materials 13 in the second magnetocaloric unit 3 are arranged in a circumferential direction. In this embodiment, different magnetocaloric materials 13 in the second magnetocaloric unit 3 are arranged along circumference, thereby make the second magnetocaloric unit 3 can be the regional structural feature of annular according to magnetic field generator 1's work area, the great advantage in space on the make full use of circumferential direction, realize the setting of the magnetocaloric material of multiple curie temperature, when the temperature that increases magnetic refrigeration device strides, can make magnetic refrigeration device have less axial dimensions, reduce magnetic refrigeration device's magnet quantity, reduce magnetic refrigeration device's cost.
The driving mechanism comprises a first support 4 and an actuator 5, the actuator 5 is mounted on the first support 4, the first magnetocaloric unit 2 is fixedly connected to the second magnetocaloric unit 3, the actuator 5 is in driving connection with the first magnetocaloric unit 2, or the actuator 5 is in driving connection with the second magnetocaloric unit 3. For the structure in which the first and second magnetocaloric units 2, 3 are arranged separately, separate actuators 5 need to be provided for the different magnetocaloric units, so as to allow independent control of the respective magnetocaloric units. For the structure in which the first magnetocaloric unit 2 and the second magnetocaloric unit 3 are fixedly connected, only one actuator 5 is required to simultaneously achieve the position adjustment of the first magnetocaloric unit 2 and the second magnetocaloric unit 3 and the switching of the magnetocaloric material 13 located in the working area of the magnetic field generator 1. The actuator 5 is a rotary actuator, for example a motor.
In one embodiment, the actuator 5 comprises a telescopic mechanism, the end of which is fixedly connected to the first magnetocaloric unit 2 by means of a connection 8. In this embodiment, the actuator 5 is a linear actuator, and can drive the first magnetocaloric unit 2 and the second magnetocaloric unit 3 to perform a linear motion by using a linear motion of the actuator in an axial direction, so as to switch positions of the first magnetocaloric unit 2 and the second magnetocaloric unit 3. The telescopic mechanism can adopt an electric push rod, a telescopic cylinder or a linear motor and the like.
In one embodiment, the actuator 5 comprises a drive screw 6, a nut sleeve 7 is sleeved on the drive screw 6, the nut sleeve 7 is fixedly connected with the first magnetocaloric unit 2 through a connecting member 8, and the drive screw 6 drives the first magnetocaloric unit 2 to move along the axial direction of the first magnetocaloric unit 2 through the nut sleeve 7. In the present embodiment, the first magnetocaloric unit 2 is not rotated relative to the actuator 5, so that when the actuator 5 is operated, the drive screw 6 can be rotated, and the nut sleeve 7 is fixedly connected to the first magnetocaloric unit 2 and also not rotated relative to the actuator 5, so that the rotation of the drive screw 6 can be converted into the linear motion of the nut sleeve 7, and the nut sleeve 7 drives the first magnetocaloric unit 2 and the second magnetocaloric unit 3 to move along the axial direction, thereby realizing the position adjustment of the first magnetocaloric unit 2 and the second magnetocaloric unit 3.
The first magnetocaloric unit 2 is divided into a plurality of magnetic regenerators 9 along the circumferential direction, fluid ports 10 are respectively disposed at two ends of each magnetic regenerator 9, and the magnetocaloric materials 13 in each magnetic regenerator 9 are the same. After entering the magnetic regenerator 9 through the fluid interface 10, the fluid flows in the magnetic regenerator 9 along the circumferential direction, and compared with the scheme that the magnetic refrigeration device in the prior art can only be arranged along the axial direction when arranging various magnetocaloric materials with curie temperatures, the axial dimension is smaller, and the usage amount of the magnet matched with the magnetocaloric materials is smaller. The plurality of magnetic regenerators 9 form an independent fluid flow structure, and when the magnetic regenerators 9 are connected with the fluid pipeline, all the magnetic regenerators 9 which are simultaneously positioned in the magnetizing area can be connected in parallel and then connected in series with the fluid pipeline, so that the flow of fluid in the first magnetocaloric unit 2 is shortened, the fluid flow resistance in the magnetic refrigeration device is reduced, the flow efficiency of the fluid in the magnetic refrigeration device is improved, and the working performance of the magnetic refrigeration device is improved.
The number of the magnetic regenerators 9 is the same as the sum of the number of the magnetized areas and the demagnetized areas of the magnetic field generator 1, and each magnetic regenerator 9 corresponds to one magnetized area or one demagnetized area. In particular, if the magnetic field generator 1 has two magnetizing regions and two demagnetizing regions, which are alternately arranged, the number of magnetic regenerators 9 should be four, wherein two magnetic regenerators 9 simultaneously correspond to the magnetizing regions and the other two magnetic regenerators 9 simultaneously correspond to the demagnetizing regions. Of course, the corresponding relationship between the magnetic regenerator 9 and the magnetized region or the demagnetized region is not constant, but periodically changes according to the operating state of the magnetic refrigeration device, so that half of the magnetic regenerator 9 in the device is in the magnetized state and half is in the demagnetized state. The magnetocaloric materials in each of the magnetic regenerators 9 in this embodiment are all single magnetocaloric materials, that is, all the first magnetocaloric materials.
The magnetic regenerators 9 in the magnetized state are connected in parallel, and the magnetic regenerators 9 in the demagnetized state are connected in parallel; then the heat exchange fluid is driven by the fluid pump to bring the heat in the magnetic regenerator 9 in the magnetized state to the hot end heat exchanger, and the cold in the magnetic regenerator 9 in the demagnetized state to the cold end heat exchanger, and the magnetic regenerators 9 (the spaced magnetic regenerators 9) in the same state are firstly connected in parallel and then connected in series with the cold end heat exchanger and the hot end heat exchanger to form a circulating heat exchange flow path.
In one embodiment, the second magnetocaloric unit 3 is divided into a plurality of magnetic regenerators 9 along the circumferential direction, two ends of each magnetic regenerator 9 are respectively provided with a fluid interface 10, and curie temperatures of the magnetocaloric materials 13 in the magnetic regenerators 9 in the magnetizing region are different; and/or the curie temperature of the magnetocaloric material 13 in the magnetic regenerator 9, which is located at the same time in the demagnetization zone, is different. The second magnetocaloric unit 3 includes one of the magnetocaloric materials.
In this embodiment, the magnetocaloric material in a single magnetic regenerator 9 is a single magnetocaloric material, and the magnetocaloric materials in different magnetic regenerators 9 located in the demagnetization area are different, so that the scheme that the second magnetocaloric unit 3 includes at least two different curie temperatures of magnetocaloric materials along the circumferential direction can also be implemented.
In one embodiment, the second magnetocaloric unit 3 is circumferentially divided into a plurality of magnetic regenerators 9, fluid connections 10 are respectively disposed at two ends of each magnetic regenerator 9, the structures of the magnetic regenerators 9 are the same, and at least two magnetocaloric materials 13 with different curie temperatures are sequentially disposed in a single magnetic regenerator 9 along the circumferential direction.
The magnetocaloric materials 13 with at least two different curie temperatures increase in curie temperature along the circumference of the second magnetocaloric unit 3, or the magnetocaloric materials 13 with at least two different curie temperatures decrease in curie temperature along the circumference of the second magnetocaloric unit 3. In this embodiment, the structures of the magnetic regenerators 9 are the same, at least two kinds of magnetocaloric materials are filled in a single magnetic regenerator 9, and curie temperatures of different magnetocaloric materials are different.
In each of the magnetic regenerators 9 described above, the fluid connection 10 extends in the axial direction, and the flow direction of the heat exchange fluid in the magnetic regenerator 9 is along the circumferential direction of the magnetic regenerator 9.
The magnetic regenerator 9 is in a fan-shaped ring shape, two ends of the magnetic regenerator 9 along the circumferential direction are respectively provided with a liquid distribution cavity 11, a fluid interface 10 is communicated with the liquid distribution cavities 11, and a magnetocaloric material 13 is filled between the liquid distribution cavities 11 at the two ends of the magnetic regenerator 9 along the circumferential direction.
Be provided with filter plate 12 between cloth liquid chamber 11 and the magnetocaloric material 13, filter plate 12 has porous structure, can be so that the magnetocaloric material that is located holding the intracavity of magnetism regenerator 9 can't pass through, and heat transfer fluid can pass through to avoid magnetocaloric material to scatter and disappear, and can not influence the heat transfer between heat transfer fluid and the magnetocaloric material.
Two fluid interfaces 10 at two ends of the magnetic regenerator 9 are used for connecting with an external fluid pipeline and play a role of leading in or leading out fluid.
The first 2 and second 3 magnetocaloric units are separated by a partition 18. In this embodiment, the first magnetocaloric unit 2 is located on the first side of the partition plate 18, the second magnetocaloric unit 3 is located on the second side of the partition plate 18, the first magnetocaloric unit 2 and the second magnetocaloric unit 3 have the same or similar shell structure, and can be used for filling magnetocaloric materials, and providing a place for heat exchange between the magnetocaloric materials and the heat exchange fluid, and the partition plate 18 is used for separating the magnetocaloric materials in different magnetocaloric units, so that the magnetocaloric materials in different magnetocaloric units cannot mix with each other and exchange heat.
The magnetocaloric materials 13 filled in the first magnetocaloric unit 2 and the second magnetocaloric unit 3 have different morphologies.
In one embodiment, the magnetocaloric material 13 filled in the first magnetocaloric unit 2 is in the form of particles, and the magnetocaloric material 13 filled in the second magnetocaloric unit 3 is in the form of plates. Because the magnetocaloric materials with different morphologies have different heat exchange effects and different pressure losses, the magnetocaloric materials with different morphologies can be selected to be connected into the working flow path according to actual working conditions by the magnetic refrigeration device, so that the system has better refrigeration performance.
The magnetic field generator 1 comprises a stator assembly 14 and a rotor assembly 15, the rotor assembly 15 being able to rotate with respect to the first and second magnetocaloric units 2, 3, the rotor assembly 15 rotating with respect to the stator assembly 14 to generate a varying magnetic field.
When the system needs to perform large-temperature span temperature reduction/rise, the controller can control the actuator 5 to perform rotary motion, further drive the first support 4 to perform linear motion through a rotary kinematic pair, drive the second magnetocaloric unit 3 filled with various curie-temperature magnetocaloric materials into a working area formed by the stator assembly 14 and the rotor assembly 15, and perform temperature reduction/rise through the large-temperature span characteristic of the multi-curie-temperature magnetocaloric materials; similarly, when the system needs to cool down with a large cooling capacity, the controller can control the actuator 5 to drive the first support 4 to drive the magnetic regenerator 9 to move, so that the first magnetocaloric unit 2 with a single magnetocaloric material is located in a magnetic field working area, and the large cooling capacity of the single magnetocaloric material is utilized to cool down quickly.
The driving mechanism is installed on the stator assembly 14, the second support 16 is further installed on the stator assembly 14, the second support 16 is provided with a rotation driver 17, the rotation driver 17 is in driving connection with the rotor assembly 15, and drives the rotor assembly 15 to rotate relative to the first magnetocaloric unit 2 and the second magnetocaloric unit 3. The rotary drive 17 is here for example an electric motor.
The stator assembly 14 in this embodiment is a permanent magnet stator assembly, the rotor assembly 15 is a permanent magnet rotor assembly, the permanent magnet stator assembly and the permanent magnet rotor assembly form the magnetic field generator 1 of the magnetic refrigeration device, and an annular space between the permanent magnet stator assembly and the permanent magnet rotor assembly becomes a working area of the magnetocaloric material. Permanent magnet stator module and first support 4 relatively fixed, the permanent magnet rotor module is connected with the motor, can make the permanent magnet rotor module move for first support 4 under the drive effect of motor, and then for the magnetocaloric unit motion with first support 4 fixed connection, produce the magnetic field that changes for the motion of permanent magnet stator module through the permanent magnet rotor module, and then add magnetism or demagnetization to the magnetocaloric material that is in the work area, make magnetocaloric material take place the magnetocaloric effect and produce cold volume and heat, transport cold volume to the cold junction heat exchanger through the heat transfer fluid among the pipe-line system again, the heat is transported to the hot junction heat exchanger and is carried out the heat transfer, thereby realize refrigeration or heat.
The magnetic field generator 1 is an electromagnetic ferromagnetic field generator which generates a varying magnetic field by varying an electric current. The electromagnetic ferromagnetic field generator performs magnetizing or demagnetizing operation by changing current, so that a motor is not required to be arranged for driving the rotation of the magnet, and the structure is simpler. The electromagnetic ferromagnetic field generator mainly comprises an iron core and a coil winding which is matched with the iron core to generate a magnetic field. The plurality of coil windings are wound on the iron core and divided into two groups, the two groups of coil windings are alternately arranged along the circumferential direction, and when the current of one group of coil windings is increased to add magnetism, the current of the other group of coil windings is reduced to remove magnetism, so that the operations of adding magnetism and removing magnetism of a magnetic field are realized.
The magnetic refrigeration device that this application provided has following advantage with current magnetic refrigeration device:
1. the current tube-shape magnetism refrigerating plant adopts that heat transfer fluid flows along section of thick bamboo axis direction, and the magnetism refrigerating plant of this application has then realized that heat transfer fluid flows along magnet direction of rotation through the magnetism regenerator of arranging the extension along the circumference of section of thick bamboo for the magnetism hot material of the multiple curie temperature in the magnetism regenerator can be arranged along magnet direction of rotation, and then makes the axial dimensions of device reduce greatly, has also reduced the use amount of magnet simultaneously.
2. The magnetocaloric materials in the existing tubular magnetic refrigeration device can not be switched, so that the magnetocaloric materials are low in environmental adaptability and regulation and control flexibility, and have a large adaptability problem in actual application; the magnetic refrigeration device provided by the application has the function of switching the magnetocaloric materials along the axial direction of the cylinder, and can be switched and adjusted according to specific refrigeration requirements, so that different magnetocaloric materials can be selected according to different environments, and the environmental adaptability and the regulation and control flexibility are greatly improved.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (18)
1. A magnetic refrigeration device, comprising a magnetic field generator (1), a first magnetocaloric unit (2), a second magnetocaloric unit (3), and a drive mechanism, wherein the first magnetocaloric unit (2) comprises a first magnetocaloric material, the second magnetocaloric unit (3) comprises a second magnetocaloric material, the Curie temperature of the first magnetocaloric material being different from the Curie temperature of the second magnetocaloric material, the drive mechanism being configured to adjust the relative positions of the first magnetocaloric unit (2) and the second magnetocaloric unit (3) with respect to the magnetic field generator (1) such that the first magnetocaloric unit (2) is located outside the working area of the magnetic field generator (1), the second magnetocaloric unit (3) is located outside the working area of the magnetic field generator (1), or such that the first magnetocaloric unit (2) is located outside the working area of the magnetic field generator (1), the second magnetocaloric unit (3) is located in a working area of the magnetic field generator (1).
2. A magnetic refrigeration device according to claim 1, characterized in that the working area of the magnetic field generator (1) is an annular area, and the first magnetocaloric unit (2) and the second magnetocaloric unit (3) are each of an annular configuration and are arranged along the axial direction of the annular area, the first magnetocaloric unit (2) and the second magnetocaloric unit (3) being movable relative to the magnetic field generator (1) along the axial direction of the annular area.
3. A magnetic refrigeration device according to claim 2, characterized in that said first magnetocaloric unit (2) is filled with a single magnetocaloric material (13) and said second magnetocaloric unit (3) is filled with at least two magnetocaloric materials (13) of different curie temperatures, the different magnetocaloric materials (13) of said second magnetocaloric unit (3) being arranged circumferentially.
4. A magnetic refrigeration device according to claim 3, characterized in that the drive mechanism comprises a first support (4) and an actuator (5), the actuator (5) being mounted on the first support (4), the first magnetocaloric unit (2) being fixedly connected to the second magnetocaloric unit (3), the actuator (5) being in driving connection with the first magnetocaloric unit (2), or the actuator (5) being in driving connection with the second magnetocaloric unit (3).
5. A magnetic refrigeration device according to claim 4, characterized in that the actuator (5) comprises a telescopic mechanism, the end of which is fixedly connected to the first magnetocaloric unit (2) by means of a connection (8); or, the actuator (5) comprises a driving screw (6), a nut sleeve (7) is sleeved on the driving screw (6), the nut sleeve (7) is fixedly connected with the first magnetocaloric unit (2) through a connecting piece (8), and the driving screw (6) drives the first magnetocaloric unit (2) to move along the axial direction of the first magnetocaloric unit (2) through the nut sleeve (7).
6. A magnetic refrigeration device according to claim 3, characterized in that the first magnetocaloric unit (2) is divided into a plurality of magnetic regenerators (9) along the circumferential direction, both ends of each magnetic regenerator (9) are respectively provided with a fluid connection (10), and the magnetocaloric material (13) in each magnetic regenerator (9) is the same.
7. A magnetic refrigeration device according to claim 6, characterized in that the number of magnetic regenerators (9) is the same as the sum of the number of magnetized and demagnetized zones of the magnetic field generator (1), one magnetized or demagnetized zone for each magnetic regenerator (9).
8. A magnetic refrigeration device according to claim 3, characterized in that the second magnetocaloric unit (3) is divided into a plurality of magnetic regenerators (9) along the circumferential direction, two ends of each magnetic regenerator (9) are respectively provided with a fluid port (10), and the curie temperatures of the magnetocaloric materials (13) in the magnetic regenerators (9) in the magnetizing region are different; and/or the Curie temperatures of the magnetocaloric materials (13) in the magnetic regenerator (9) which are simultaneously located in the demagnetization zone differ.
9. A magnetic refrigeration device according to claim 3, characterized in that the second magnetocaloric unit (3) is divided into a plurality of magnetic regenerators (9) along the circumferential direction, two ends of each magnetic regenerator (9) are respectively provided with a fluid port (10), the structures of each magnetic regenerator (9) are the same, and at least two different curie temperature magnetocaloric materials (13) are sequentially arranged in a single magnetic regenerator (9) along the circumferential direction.
10. A magnetic refrigeration device according to claim 9, characterized in that the curie temperatures of the magnetocaloric materials (13) of at least two different curie temperatures increase progressively along the circumferential direction of the second magnetocaloric unit (3), or the curie temperatures of the magnetocaloric materials (13) of at least two different curie temperatures decrease progressively along the circumferential direction of the second magnetocaloric unit (3).
11. A magnetic refrigeration device according to any one of claims 6 to 10, characterized in that the magnetic regenerator (9) is in a shape of a sector ring, liquid distribution chambers (11) are respectively arranged at two ends of the magnetic regenerator (9) along the circumferential direction, the fluid port (10) is communicated with the liquid distribution chambers (11), and the magnetocaloric material (13) is filled between the liquid distribution chambers (11) at the two ends of the magnetic regenerator (9) along the circumferential direction.
12. A magnetic refrigeration device according to claim 11, characterized in that a sieve plate (12) is arranged between the liquid distribution chamber (11) and the magnetocaloric material (13).
13. A magnetic refrigeration device according to claim 1, characterized in that said first magnetocaloric unit (2) and said second magnetocaloric unit (3) are separated by a partition (18).
14. A magnetic refrigeration device according to claim 1, characterized in that the morphology of the magnetocaloric material (13) filled in the first magnetocaloric unit (2) and in the second magnetocaloric unit (3) is different.
15. A magnetic refrigeration device according to claim 14, characterized in that said first magnetocaloric unit (2) is filled with magnetocaloric material (13) in the form of particles and said second magnetocaloric unit (3) is filled with magnetocaloric material (13) in the form of plates.
16. A magnetic refrigeration device according to any of claims 2 to 10, characterized in that the magnetic field generator (1) comprises a stator assembly (14) and a rotor assembly (15), the rotor assembly (15) being rotatable with respect to the first and second magnetocaloric units (2, 3), the rotor assembly (15) rotating with respect to the stator assembly (14) to generate a varying magnetic field.
17. A magnetic refrigeration device according to claim 16, characterized in that the drive mechanism is mounted on the stator assembly (14), a second bracket (16) is further mounted on the stator assembly (14), a rotation driver (17) is provided on the second bracket (16), the rotation driver (17) is in driving connection with the rotor assembly (15) and drives the rotor assembly (15) to rotate relative to the first magnetocaloric unit (2) and the second magnetocaloric unit (3).
18. A magnetic refrigeration device according to any of claims 2 to 10, characterized in that the magnetic field generator (1) is an electromagnetic ferromagnetic field generator that generates a varying magnetic field by means of a varying electric current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022513034.4U CN213631055U (en) | 2020-11-03 | 2020-11-03 | Magnetic refrigerating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022513034.4U CN213631055U (en) | 2020-11-03 | 2020-11-03 | Magnetic refrigerating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484922A (en) * | 2022-01-05 | 2022-05-13 | 中国科学院江西稀土研究院 | Solid-state refrigerating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484922A (en) * | 2022-01-05 | 2022-05-13 | 中国科学院江西稀土研究院 | Solid-state refrigerating device |
| CN114484922B (en) * | 2022-01-05 | 2024-02-23 | 中国科学院江西稀土研究院 | Solid-state refrigerating device |
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