CN213631054U - Magnetic refrigeration device and magnetic refrigeration system - Google Patents
Magnetic refrigeration device and magnetic refrigeration system Download PDFInfo
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- CN213631054U CN213631054U CN202022512557.7U CN202022512557U CN213631054U CN 213631054 U CN213631054 U CN 213631054U CN 202022512557 U CN202022512557 U CN 202022512557U CN 213631054 U CN213631054 U CN 213631054U
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- 239000012530 fluid Substances 0.000 claims description 39
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- 238000005457 optimization Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 description 28
- 230000001276 controlling effect Effects 0.000 description 15
- 230000005347 demagnetization Effects 0.000 description 7
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Abstract
The application provides a magnetic refrigeration device and a magnetic refrigeration system. This magnetic refrigeration device includes first magnetic refrigeration subassembly (1) and second magnetic refrigeration subassembly (2), first magnetic refrigeration subassembly (1) includes first electromagnetism ferromagnetic field generator (3) and first magnetocaloric unit (4), first magnetocaloric unit (4) set up in the working area of first electromagnetism ferromagnetic field generator (3), second magnetic refrigeration subassembly (2) includes permanent magnet magnetic field generator (5) and second magnetocaloric unit (6), second magnetocaloric unit (6) set up in the working area of permanent magnet magnetic field generator (5), the curie temperature difference of the magnetocaloric material in first magnetocaloric unit (4) and the second magnetocaloric unit (6). According to the magnetic refrigeration device, when the ambient temperature deviates from the working temperature zone of the existing magnetocaloric material, the magnetocaloric material matched with the ambient temperature is selected, the flow resistance is reduced, and the working efficiency of the magnetocaloric material is improved.
Description
Technical Field
The application relates to the technical field of magnetic refrigeration, in particular to a magnetic refrigeration device and a magnetic refrigeration system.
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.
In a magnetic refrigeration prototype, a pump is generally used to drive a fluid to flow through a magnetized regenerator to absorb heat released by a magnetic working medium and then flow through a hot end radiator, the fluid returning to normal temperature flows through a demagnetized regenerator to absorb cold generated by the magnetic working medium, and the cold is released by the cold end radiator, so that a magnetic refrigeration cycle is formed.
Due to the characteristics of the magnetic working medium, different kinds of magnetic working media correspond to different optimal working temperature regions, and when the temperature is not in the optimal working temperature region, the refrigerating efficiency of the magnetic working medium is reduced. In actual work, due to the climate difference of regions with different latitudes in the south and north, the temperature difference in winter and summer, the heat concentration of the operation of the equipment and other factors, the refrigeration equipment needs to adapt to larger temperature span; in order to more effectively utilize magnetic working media under a large-temperature span magnetic working medium platform, equipment is required to separately treat the magnetic working media in different temperature regions, the conventional magnetic working media are stacked in a permanent magnet regenerator, the flow resistance is large, meanwhile, the working efficiency of the magnetic working media which are not in the temperature regions is low, and the flow resistance is increased.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem that this application will be solved lies in providing a magnetism refrigerating plant and magnetism refrigerating system, can be when the ambient temperature deviates current magnetocaloric material working temperature district, select the magnetocaloric material that matches with this ambient temperature, reduce the flow resistance, improve magnetocaloric material work efficiency.
In order to solve the above problem, the application provides a magnetic refrigeration device, including first magnetic refrigeration subassembly and second magnetic refrigeration subassembly, first magnetic refrigeration subassembly and magnetic refrigeration subassembly are independent each other, first magnetic refrigeration subassembly includes first electromagnetic field generator and first magnetocaloric unit, first magnetocaloric unit sets up in first electromagnetic field generator's working area, second magnetic refrigeration subassembly includes permanent magnet field generator and second magnetocaloric unit, second magnetocaloric unit sets up in permanent magnet field generator's working area, the curie temperature of the magnetocaloric material in first magnetocaloric unit and the second magnetocaloric unit is different.
Preferably, the magnetic refrigeration device further comprises a third magnetic refrigeration component, the third magnetic refrigeration component and the first magnetic refrigeration component are independent of the second magnetic refrigeration component, the third magnetic refrigeration component comprises a second electromagnetic ferromagnetic field generator and a third magnetocaloric unit, the third magnetocaloric unit is arranged in a working area of the second electromagnetic ferromagnetic field generator, and curie temperatures of magnetocaloric materials in the third magnetocaloric unit, the first magnetocaloric unit and the second magnetocaloric unit are different.
Preferably, the first magnetic refrigeration assembly, the second magnetic refrigeration assembly and the third magnetic refrigeration assembly are arranged in sequence.
Preferably, the first magnetic refrigeration component further comprises a first outer barrel, the first electromagnetic magnetic field generator is installed in the first outer barrel, the second magnetic refrigeration component comprises a second outer barrel, the permanent magnetic field generator comprises a permanent magnet stator and a permanent magnet rotor, the permanent magnet stator is arranged in the second outer barrel, the permanent magnet rotor can be rotatably sleeved in the permanent magnet stator and forms a working area with the permanent magnet stator, and the first outer barrel is fixedly connected with the second outer barrel.
Preferably, the diameter of the first outer barrel is smaller than that of the second outer barrel, and the first outer barrel and the second outer barrel are connected through a first conical barrel.
Preferably, first magnetic refrigeration subassembly still includes first urceolus, first electromagnetic field generator installs in first urceolus, second magnetic refrigeration subassembly includes the second urceolus, permanent magnet field generator includes permanent magnet stator and permanent magnet rotor, the permanent magnet stator sets up in the second urceolus, the permanent magnet rotor can rotationally overlap and establish in the permanent magnet stator, and form work area between the permanent magnet stator, third magnetic refrigeration subassembly still includes the third urceolus, second electromagnetic field generator installs in the third urceolus, first urceolus and second urceolus fixed connection, third urceolus and second urceolus fixed connection.
Preferably, the diameter of the first outer barrel is smaller than that of the second outer barrel, the diameter of the third outer barrel is smaller than that of the second outer barrel, the first outer barrel is connected with the second outer barrel through a first taper barrel, and the third outer barrel is connected with the second outer barrel through a second taper barrel.
Preferably, the permanent magnet magnetic field generator comprises a permanent magnet stator and a permanent magnet rotor, the permanent magnet rotor is rotatably sleeved in the permanent magnet stator and forms a working area with the permanent magnet stator, the permanent magnet stator is formed by splicing a plurality of magnets into a ring shape, and/or the permanent magnet rotor is formed by splicing a plurality of magnets.
Preferably, the permanent magnet rotor includes first rotor magnets and second rotor magnets alternately arranged in a circumferential direction, and a magnetic field strength of the first rotor magnets is greater than a magnetic field strength of the second rotor magnets.
Preferably, the plurality of magnets of the permanent magnet stator form a halbach array and the plurality of magnets of the permanent magnet rotor form a halbach array.
Preferably, the magnets of the permanent magnet stator and the permanent magnet rotor are formed by segmentation based on the distribution of the equipotential lines of the magnetic field by adopting a topological optimization algorithm.
Preferably, the first magnetocaloric unit is filled with a low-temperature magnetocaloric material, the second magnetocaloric unit is filled with a normal-temperature magnetocaloric material, the third magnetocaloric unit is filled with a high-temperature magnetocaloric material, and curie temperatures of the low-temperature magnetocaloric material, the normal-temperature magnetocaloric material, and the high-temperature magnetocaloric material are increased progressively.
Preferably, the working temperature zone of the low-temperature-section magnetocaloric material is a-b, the working temperature zone of the normal-temperature-section magnetocaloric material is b-c, and the working temperature zone of the high-temperature-section magnetocaloric material is c-d, wherein a is more than b and less than c and less than d.
Preferably, the first magnetic refrigeration assembly and the third magnetic refrigeration assembly both adopt a single-bed structure.
According to another aspect of the present application, there is provided a magnetic refrigeration system comprising a magnetic refrigeration device as described above.
Preferably, the magnetic refrigeration system further comprises a driving pump, a first heat exchanger and a second heat exchanger, the second heat exchanger is arranged at an inlet end of the driving pump, the magnetic refrigeration device is arranged at an outlet end of the driving pump, the first heat exchanger is arranged between an outlet of the magnetic refrigeration device and the second heat exchanger, a bypass pipeline connected with the first heat exchanger in parallel is further arranged between the outlet of the magnetic refrigeration device and the second heat exchanger, and heat exchange fluid can selectively flow to the second heat exchanger through the bypass pipeline or through the first heat exchanger.
Preferably, a control valve is further arranged between the magnetic refrigeration device and the driving pump, and the control valve can control the flow path of the heat exchange fluid in the magnetic refrigeration device.
The application provides a magnetic refrigeration device, including first magnetic refrigeration subassembly and second magnetic refrigeration subassembly, first magnetic refrigeration subassembly and magnetic refrigeration subassembly are independent each other, first magnetic refrigeration subassembly includes first electromagnetic field generator and first magnetocaloric unit, first magnetocaloric unit sets up in first electromagnetic field generator's working area, second magnetic refrigeration subassembly includes permanent magnet field generator and second magnetocaloric unit, second magnetocaloric unit sets up in permanent magnet field generator's working area, the curie temperature of the magnetocaloric material in first magnetocaloric unit and the second magnetocaloric unit is different. The utility model provides a magnetic refrigeration device, make up a plurality of mutually independent magnetic refrigeration subassemblies, every magnetic refrigeration subassembly all has independent magnetic field generator and hot unit of magnetism, consequently, can realize the independent control to each hot unit of magnetism, each independent magnetic refrigeration subassembly can optionally communicate with the fluid pipeline, consequently, when the temperature deviates current working temperature zone of the hot material of magnetism that is in operating condition, can be with the hot unit of magnetism of fluid pipeline match connection to with current temperature looks adaptation, thereby avoid hot material work unmatched at the warm zone, effectively guarantee hot material's work efficiency of magnetism, it is more energy-conserving effective. The utility model provides a part magnetism refrigeration subassembly adopts electromagnetic field generator to add magnetism and demagnetization control, part magnetism refrigeration subassembly adopts permanent magnet field generator to add magnetism and demagnetization control, because electromagnetic field and permanent magnetic field are mutually independent, consequently, can place the magnetocaloric material of different warm areas in different magnetic field districts, and the flow path that the magnetocaloric material of different warm areas has also mutually independent, can independent work, and can be at the magnetocaloric material during operation of this warm area, reject out the flow path with the magnetocaloric material of other warm areas, consequently, can avoid the magnetocaloric material of other warm areas to form the hindrance to the fluid flow, reduce the flow resistance, improve magnetocaloric material work efficiency.
Drawings
Fig. 1 is an exploded structural view of a magnetic refrigerator according to an embodiment of the present application;
FIG. 2 is a block diagram of a magnetic refrigeration unit according to an embodiment of the present application;
FIG. 3 is a structural view of a second magnetocaloric unit of a magnetic refrigeration apparatus according to an embodiment of the present application;
FIG. 4 is a block diagram of a permanent magnet magnetic field generator of a magnetic refrigeration unit in accordance with an embodiment of the present application;
FIG. 5 is a side view of a permanent magnet magnetic field generator of a magnetic refrigeration device according to an embodiment of the present application;
FIG. 6 is a control schematic of a magnetic refrigeration system according to an embodiment of the present application;
FIG. 7 is a method schematic of a magnetic refrigeration system according to an embodiment of the present application;
fig. 8 is a control flow diagram of a magnetic refrigeration system according to an embodiment of the present application.
The reference numerals are represented as:
1. a first magnetic refrigeration assembly; 2. a second magnetic refrigeration assembly; 3. a first electromagnetic ferromagnetic field generator; 4. a first magnetocaloric unit; 5. a permanent magnet magnetic field generator; 6. a second magnetocaloric unit; 7. a third magnetic refrigeration assembly; 8. a second electromagnetic ferromagnetic field generator; 9. a third magnetocaloric unit; 10. a first outer barrel; 11. a second outer barrel; 12. a permanent magnet stator; 13. a permanent magnet rotor; 131. a first rotor magnet; 132. a second rotor magnet; 14. a third outer barrel; 15. driving the pump; 16. a first heat exchanger; 17. a second heat exchanger; 18. a control valve; 19. a three-way valve; 20. a first cone; 21. and a second cone.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present application, a magnetic refrigeration apparatus includes a first magnetic refrigeration assembly 1 and a second magnetic refrigeration assembly 2, the first magnetic refrigeration assembly 1 and the magnetic refrigeration assembly are independent of each other, the first magnetic refrigeration assembly 1 includes a first electromagnetic magnetic field generator 3 and a first magnetocaloric unit 4, the first magnetocaloric unit 4 is disposed in a working region of the first electromagnetic magnetic field generator 3, the second magnetic refrigeration assembly 2 includes a permanent magnetic field generator 5 and a second magnetocaloric unit 6, the second magnetocaloric unit 6 is disposed in a working region of the permanent magnetic field generator 5, curie temperatures of magnetocaloric materials in the first magnetocaloric unit 4 and the second magnetocaloric unit 6 are different.
The utility model provides a magnetic refrigeration device, make up a plurality of mutually independent magnetic refrigeration subassemblies, every magnetic refrigeration subassembly all has independent magnetic field generator and hot unit of magnetism, consequently, can realize the independent control to each hot unit of magnetism, each independent magnetic refrigeration subassembly can optionally communicate with the fluid pipeline, consequently, when the temperature deviates current working temperature zone of the hot material of magnetism that is in operating condition, can be with the hot unit of magnetism of fluid pipeline match connection to with current temperature looks adaptation, thereby avoid hot material work unmatched at the warm zone, effectively guarantee hot material's work efficiency of magnetism, it is more energy-conserving effective. The utility model provides a part magnetism refrigeration subassembly adopts electromagnetic field generator to add magnetism and demagnetization control, part magnetism refrigeration subassembly adopts permanent magnet field generator to add magnetism and demagnetization control, because electromagnetic field and permanent magnetic field are mutually independent, consequently, can place the magnetocaloric material of different warm areas in different magnetic field districts, and the flow path that the magnetocaloric material of different warm areas has also mutually independent, can independent work, and can be at the magnetocaloric material during operation of this warm area, reject out the flow path with the magnetocaloric material of other warm areas, consequently, can avoid the magnetocaloric material of other warm areas to form the hindrance to the fluid flow, reduce the flow resistance, improve magnetocaloric material work efficiency.
The magnetic refrigeration device further comprises a third magnetic refrigeration component 7, the third magnetic refrigeration component 7 and the first magnetic refrigeration component 1, the second magnetic refrigeration component 2 are mutually independent, the third magnetic refrigeration component 7 comprises a second electromagnetic ferromagnetic field generator 8 and a third magnetocaloric unit 9, the third magnetocaloric unit 9 is arranged in a working area of the second electromagnetic ferromagnetic field generator 8, and Curie temperatures of magnetocaloric materials in the third magnetocaloric unit 9, the first magnetocaloric unit 4 and the second magnetocaloric unit 6 are different.
This application is through increasing third magnetic refrigeration subassembly 7 to make the curie temperature of the magnetocaloric material of third magnetocaloric unit 9 and the curie temperature of the magnetocaloric material of first magnetocaloric unit 4 and second magnetocaloric unit 6 all be different in third magnetic refrigeration subassembly 7, consequently can form three working temperature district, effectively increased magnetic refrigeration device's temperature and strided, improved magnetic refrigeration device's adaptability.
The first magnetic refrigeration component 1, the second magnetic refrigeration component 2 and the third magnetic refrigeration component 7 are arranged in sequence.
In this embodiment, first magnetic refrigeration subassembly 1, second magnetic refrigeration subassembly 2 and third magnetic refrigeration subassembly 7 are the tubular structure, simple structure, and processing is convenient.
In one embodiment, the first magnetic refrigeration assembly 1 further comprises a first outer cylinder 10, the first electromagnetic magnetic field generator 3 is installed in the first outer cylinder 10, the second magnetic refrigeration assembly 2 comprises a second outer cylinder 11, the permanent magnetic field generator 5 comprises a permanent magnet stator 12 and a permanent magnet rotor 13, the permanent magnet stator 12 is arranged in the second outer cylinder 11, the permanent magnet rotor 13 is rotatably sleeved in the permanent magnet stator 12 and forms a working area with the permanent magnet stator 12, and the first outer cylinder 10 is fixedly connected with the second outer cylinder 11.
Because the second magnetic refrigeration component 2 adopts the permanent magnet magnetic field generator 5, the peripheries of the permanent magnet stator 12 and the permanent magnet rotor 13 are both circular, and the second outer cylinder 11 is also of a cylinder structure and can be matched with the shape of the permanent magnet stator 12, so that the permanent magnet stator 12 is conveniently installed and fixed in the second outer cylinder 11. Since the second magnetic refrigeration component 2 is of a cylindrical structure as a whole, the first magnetic refrigeration component 1 is also of a cylindrical structure in order to ensure the consistency of the appearance structure.
The diameter of first urceolus 10 is less than the diameter of second urceolus 11, connects through first awl section of thick bamboo 20 between first urceolus 10 and the second urceolus 11, and first awl section of thick bamboo 20 plays transitional coupling's effect here, can make the structure size of first electromagnetic field magnetic generator 3 only need satisfy first magnetism thermal unit 4's requirement, can not receive the structural influence of second magnetism refrigeration component 2, and the structure can be compacter, and structural design is more reasonable.
In one embodiment, the first magnetic refrigeration component 1 further includes a first outer cylinder 10, the first electromagnetic magnetic field generator 3 is installed in the first outer cylinder 10, the second magnetic refrigeration component 2 includes a second outer cylinder 11, the permanent magnetic field generator 5 includes a permanent magnet stator 12 and a permanent magnet rotor 13, the permanent magnet stator 12 is disposed in the second outer cylinder 11, the permanent magnet rotor 13 is rotatably sleeved in the permanent magnet stator 12 and forms a working area with the permanent magnet stator 12, the third magnetic refrigeration component 7 further includes a third outer cylinder 14, the second electromagnetic magnetic field generator 8 is installed in the third outer cylinder 14, the first outer cylinder 10 is fixedly connected with the second outer cylinder 11, and the third outer cylinder 14 is fixedly connected with the second outer cylinder 11.
The diameter of the first outer cylinder 10 is smaller than that of the second outer cylinder 11, the diameter of the third outer cylinder 14 is smaller than that of the second outer cylinder 11, the first outer cylinder 10 is connected with the second outer cylinder 11 through a first taper cylinder 20, and the third outer cylinder 14 is connected with the second outer cylinder 11 through a second taper cylinder 21.
The first cone drum 20 and the second cone drum 21 play a role in transitional connection, the structural size of the first electromagnetic magnetic field generator 3 only needs to meet the requirement of the first magnetic thermal unit 4, the size of the second electromagnetic magnetic field generator 8 only needs to meet the requirement of the third magnetic thermal unit 9, and the second magnetic thermal unit 2 cannot be influenced by the structure, so that the overall structure of the magnetic thermal device can be more compact, and the structural design is more reasonable.
The permanent magnet magnetic field generator 5 comprises a permanent magnet stator 12 and a permanent magnet rotor 13, the permanent magnet rotor 13 is rotatably sleeved in the permanent magnet stator 12 and forms a working area with the permanent magnet stator 12, the permanent magnet stator 12 is formed by splicing a plurality of magnets into a ring shape, and/or the permanent magnet rotor 13 is formed by splicing a plurality of magnets.
In one embodiment, the permanent magnet rotor 13 includes first rotor magnets 131 and second rotor magnets 132, the first rotor magnets 131 and the second rotor magnets 132 are alternately arranged in the circumferential direction, and the magnetic field strength of the first rotor magnets 131 is greater than that of the second rotor magnets 132.
The permanent magnet magnetic field generator 5 in this embodiment includes magnets of 5 kinds of shapes, wherein every magnetic pole of permanent magnet stator 12 includes four magnets, two of them magnets are symmetrical structure, the structure is the same, the direction of magnetizing is different, every magnetic pole of permanent magnet rotor 13 includes two magnets, the structure of two magnets is different, the direction of magnetizing of each magnet that constitutes permanent magnet magnetic field generator 5 all is unanimous with the line direction of magnetic force of walking of its position department.
In the embodiment, the permanent magnet stator 12 forms an outer ring permanent magnet, the permanent magnet rotor 13 forms an inner ring permanent magnet, an annular air gap is formed between the outer ring permanent magnet and the inner ring permanent magnet, six high-field magnetic field regions and six low-field magnetic field regions are generated in the annular air gap, the permanent magnet rotor 13 is in driving connection with the motor through a shaft and is driven to rotate by the motor, so that the high-field region and the low-field region are alternately changed, and a changing magnetic field is generated.
The plurality of magnets of the permanent magnet stator 12 form a halbach array, and the plurality of magnets of the permanent magnet rotor 13 form a halbach array.
The magnets of the permanent magnet stator 12 and the permanent magnet rotor 13 are formed by segmentation based on the distribution of the equipotential lines of the magnetic field by adopting a topological optimization algorithm. It can be found by calculation that the permanent magnet magnetic field generator 5 obtained by the above-described method of the present application has a high field strength of 1.06T and a low field strength of 0.20T.
The electromagnetic ferromagnetic field generator comprises coils and outer yokes, wherein the coils are wound on the outer yokes, the current of the coils is controllable, the two outer yokes are arranged oppositely, and an alternating magnetic field of 0-3T can be generated at the position of an air gap to meet the requirements of magnetization and demagnetization of a magnetocaloric material.
In one embodiment, the first magnetocaloric unit 4 is filled with a low-temperature stage magnetocaloric material, the second magnetocaloric unit 6 is filled with a normal-temperature stage magnetocaloric material, and the third magnetocaloric unit 9 is filled with a high-temperature stage magnetocaloric material, and curie temperatures of the low-temperature stage magnetocaloric material, the normal-temperature stage magnetocaloric material, and the high-temperature stage magnetocaloric material increase progressively.
The magnetocaloric materials in different temperature ranges can adopt different morphologies, such as granular, sheet or microchannel morphologies.
The working temperature area of the low-temperature-section magnetocaloric material is a-b, the working temperature area of the normal-temperature-section magnetocaloric material is b-c, and the working temperature area of the high-temperature-section magnetocaloric material is c-d, wherein a is more than b and less than c and less than d.
The temperature zone division can be considered to be divided according to the application area and the occasion of the magnetic refrigeration device, and can also be set by the magnetic refrigeration system through the self-learning capability in the working process.
In one embodiment, the first magnetic refrigeration assembly 1 and the third magnetic refrigeration assembly 7 each employ a single bed configuration.
Referring to fig. 1 to 6 in combination, according to an embodiment of the present application, a magnetic refrigeration system includes a magnetic refrigeration device, which is the above-described magnetic refrigeration device.
The magnetic refrigeration system further comprises a driving pump 15, a first heat exchanger 16 and a second heat exchanger 17, the second heat exchanger 17 is arranged at the inlet end of the driving pump 15, the magnetic refrigeration device is arranged at the outlet end of the driving pump 15, the first heat exchanger 16 is arranged between the outlet of the magnetic refrigeration device and the second heat exchanger 17, a bypass pipeline which is connected with the first heat exchanger 16 in parallel is further arranged between the outlet of the magnetic refrigeration device and the second heat exchanger 17, and heat exchange fluid can selectively flow to the second heat exchanger 17 through the bypass pipeline or through the first heat exchanger 16. Specifically, the bypass line, the first heat exchanger 16, and the magnetic refrigeration apparatus in the present embodiment are connected by a three-way valve 19, and flow path control is realized.
A control valve 18 is also provided between the magnetic refrigerator and the driving pump 15, and the control valve 18 can control the flow path of the heat exchange fluid in the magnetic refrigerator. When the magnetic refrigeration apparatus of the present embodiment includes three magnetic refrigeration components, the control valve 18 is, for example, a four-way control valve.
The utility model provides a magnetism refrigerating system, magnetism refrigerating plant adopt single bed structure, and through rational design magnetism refrigerating system's pipeline structure, only need a magnetism refrigerating plant, just can satisfy the switching control that adds magnetism and demagnetization in the magnetism refrigerating system working process, and the structure is simpler, and the cost is lower.
When the magnetic refrigeration system works, the driving pump 15 drives fluid to flow, the temperature sensor detects that the outflow temperature of the fluid is T0, and the environment temperature sensor detects that the temperature of the temperature-adjusting space is T1; when T0 is in a-b, the first electromagnetic ferromagnetic field generator 3 is turned on; when the first electromagnetic magnetic field generator 3 is demagnetized, the fluid flows, and the fluid flows to the first magnetocaloric unit 4 under the control of the four-way control valve; the cooled fluid flows to the first heat exchanger 16 through the three-way valve 19, and the fluid after heat exchange by the first heat exchanger 16 flows to the second heat exchanger 17 and then returns to the driving pump 15; when the electromagnet is magnetized, the fluid flows to the first magnetocaloric unit 4 under the control of the four-way electromagnetic valve, then flows to the second heat exchanger 17 through the three-way valve 19, releases heat from the second heat exchanger 17, and then returns to the driving pump 15, and the first heat exchanger 16 does not participate in heat exchange; the first electromagnetic ferromagnetic field generator 3 is continuously demagnetized, so that continuous circulation refrigeration is realized, and a temperature gradient is generated.
When T0 is at c-d, the second electromagnetic ferromagnetic field generator 8 is turned on; when the second electromagnetic field generator 8 is demagnetized, the fluid flows, and the flow of the fluid to the third magnetocaloric unit 9 is controlled by the four-way control valve; the cooled fluid flows to the first heat exchanger 16 through the three-way valve 19, and the fluid after heat exchange by the first heat exchanger 16 flows to the second heat exchanger 17 and then returns to the driving pump 15; when the electromagnet is magnetized, the fluid flows to the third magnetocaloric unit 9 under the control of the four-way electromagnetic valve, then flows to the second heat exchanger 17 through the three-way valve 19, releases heat from the second heat exchanger 17, and then returns to the driving pump 15, and the first heat exchanger 16 does not participate in heat exchange; the second electromagnetic ferromagnetic field generator 8 continuously demagnetizes, thereby continuously circulating and refrigerating to generate a temperature gradient.
When the detection temperature T0 is in the temperature zone b-c, the first electromagnetic magnetic field generator 3 and the second electromagnetic magnetic field generator 8 are closed, and the motor drives the permanent magnet rotor 13 to move; during demagnetization, the fluid flowing out of the driving pump 15 flows to the demagnetized second magnetocaloric unit 6 through the four-way control valve, then flows to the first heat exchanger 16 through the three-way valve 19, and finally returns to the driving pump 15 after heat exchange, so as to perform refrigeration; when the driving pump 15 is magnetized, the fluid flowing out of the driving pump 15 flows to the magnetized second magnetocaloric unit 6 through the four-way control valve, the fluid after heat exchange flows to the second heat exchanger 17 through the three-way valve 19 and the bypass pipeline, and finally returns to the driving pump 15, so that a complete loop is formed, and the first heat exchanger 16 does not participate in heat exchange.
Referring to fig. 7 and 8 in combination, according to an embodiment of the present application, the magnetic refrigeration control method of the magnetic refrigeration system includes: acquiring the fluid outflow temperature T0 of the driving pump 15; acquiring temperature T1 of a temperature adjusting space; acquiring a set temperature T2 of a temperature-adjusting space; the control of the magnetic refrigeration components of the magnetic refrigeration apparatus is performed according to T0, T1, and T2.
The step of controlling each magnetic refrigeration component of the magnetic refrigeration apparatus according to T0, T1, and T2 includes: when the absolute value of T1-T2 is more than or equal to Tk, each magnetic refrigeration assembly is controlled according to the outflow temperature T0 of the fluid; if a is more than or equal to T0 and less than b, controlling a fluid pipeline of the magnetic refrigeration system to be communicated with the first magnetocaloric unit 4, and simultaneously controlling the first electromagnetic ferromagnetic field generator 3 to operate at a frequency f 1; if b is more than or equal to T0 and less than c, controlling a fluid pipeline of the magnetic refrigeration system to be communicated with the second magnetocaloric unit 6, and simultaneously controlling the permanent magnet magnetic field generator 5 to operate at the frequency f 3; and if c is less than or equal to T0 and less than or equal to d, controlling the fluid pipeline of the magnetic refrigeration system to be communicated with the third magnetocaloric unit 9, and simultaneously controlling the second electromagnetic ferromagnetic field generator 8 to operate at the frequency f 5.
The step of controlling each magnetic refrigeration component of the magnetic refrigeration apparatus according to T0, T1, and T2 includes: when the absolute value of T1-T2 is less than Tk, controlling each magnetic refrigeration assembly according to the fluid outflow temperature T0; if a is more than or equal to T0 and less than b, controlling a fluid pipeline of the magnetic refrigeration system to be communicated with the first magnetocaloric unit 4, and simultaneously controlling the first electromagnetic ferromagnetic field generator 3 to operate at a frequency f 2; if b is more than or equal to T0 and less than c, controlling a fluid pipeline of the magnetic refrigeration system to be communicated with the second magnetocaloric unit 6, and simultaneously controlling the permanent magnet magnetic field generator 5 to operate at the frequency f 4; and if c is less than or equal to T0 and less than or equal to d, controlling the fluid pipeline of the magnetic refrigeration system to be communicated with the third magnetocaloric unit 9, and simultaneously controlling the second electromagnetic ferromagnetic field generator 8 to operate at the frequency f 6.
The magnetic refrigeration control method further comprises the following steps: detecting and updating T0, T1 and T2 every delta T time; and performing negative feedback regulation according to the updated T0, T1 and T2 until the shutdown is finished.
The operating frequency of each magnetic field generator can be automatically regulated and controlled by a magnetic refrigeration system according to detected parameters, and can also be regulated by an empirical formula and the like.
According to the control method, each magnetocaloric unit of the magnetic refrigeration system can always work in the optimal working temperature area, and meanwhile, the working frequency of the fluid flow and the working frequency of the magnetic field generator can be adjusted according to the difference value of the temperature adjusting space temperature and the temperature adjusting space set temperature, so that the working performance and the working efficiency of the magnetic refrigeration system are effectively improved.
The temperature adjusting space is a space in which temperature adjustment is required. For example, when the magnetic refrigeration system is used for room temperature regulation, the temperature-regulated space is indoor and the external environment is outdoor, and when the magnetic refrigeration system is used for a refrigerator or an ice chest, the temperature-regulated space is in a box or in a cabinet and the external environment is outside the box or outside the cabinet. The temperature-controlled space and the external space are therefore relative spaces, not specifically defined, but rather determined by the purpose to be achieved by adjusting the temperature.
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 (17)
1. The utility model provides a magnetic refrigeration device, its characterized in that includes first magnetic refrigeration subassembly (1) and second magnetic refrigeration subassembly (2), first magnetic refrigeration subassembly (1) with the magnetic refrigeration subassembly is independent each other, first magnetic refrigeration subassembly (1) includes first electromagnetic field generator (3) and first magnetocaloric unit (4), first magnetocaloric unit (4) set up in the working area of first electromagnetic field generator (3), second magnetic refrigeration subassembly (2) includes permanent magnet magnetic field generator (5) and second magnetocaloric unit (6), second magnetocaloric unit (6) set up in the working area of permanent magnet magnetic field generator (5), first magnetocaloric unit (4) with the curie temperature of the magnetocaloric material in the second magnetocaloric unit (6) is different.
2. A magnetic refrigeration device according to claim 1, characterized in that it further comprises a third magnetic refrigeration component (7), said third magnetic refrigeration component (7) being independent from said first and second magnetic refrigeration components (1, 2), said third magnetic refrigeration component (7) comprising a second electromagnetic ferromagnetic field generator (8) and a third magnetocaloric unit (9), said third magnetocaloric unit (9) being arranged in the working area of said second electromagnetic ferromagnetic field generator (8), the curie temperatures of the magnetocaloric materials in the third magnetocaloric unit (9), said first magnetocaloric unit (4), said second magnetocaloric unit (6) being different.
3. A magnetic refrigeration device according to claim 2, characterized in that said first magnetic refrigeration assembly (1), said second magnetic refrigeration assembly (2) and said third magnetic refrigeration assembly (7) are arranged in sequence.
4. A magnetic refrigeration device according to claim 1, characterized in that the first magnetic refrigeration component (1) further comprises a first outer cylinder (10), the first electromagnetic field generator (3) is mounted in the first outer cylinder (10), the second magnetic refrigeration component (2) comprises a second outer cylinder (11), the permanent magnet field generator (5) comprises a permanent magnet stator (12) and a permanent magnet rotor (13), the permanent magnet stator (12) is arranged in the second outer cylinder (11), the permanent magnet rotor (13) is rotatably sleeved in the permanent magnet stator (12) and forms a working area with the permanent magnet stator (12), and the first outer cylinder (10) and the second outer cylinder (11) are fixedly connected.
5. A magnetic refrigeration device according to claim 4, characterized in that the diameter of the first outer cylinder (10) is smaller than the diameter of the second outer cylinder (11), the first outer cylinder (10) and the second outer cylinder (11) being connected by a first cone (20).
6. A magnetic refrigeration device according to claim 2, characterized in that the first magnetic refrigeration assembly (1) further comprises a first outer cylinder (10), the first electromagnetic magnetic field generator (3) is mounted in the first outer cylinder (10), the second magnetic refrigeration assembly (2) comprises a second outer cylinder (11), the permanent magnetic field generator (5) comprises a permanent magnet stator (12) and a permanent magnet rotor (13), the permanent magnet stator (12) is arranged in the second outer cylinder (11), the permanent magnet rotor (13) is rotatably sleeved in the permanent magnet stator (12) and forms a working area with the permanent magnet stator (12), the third magnetic refrigeration assembly (7) further comprises a third outer cylinder (14), the second electromagnetic magnetic field generator (8) is mounted in the third outer cylinder (14), the first outer cylinder (10) is fixedly connected with the second outer cylinder (11), and the third outer cylinder (14) is fixedly connected with the second outer cylinder (11).
7. A magnetic refrigeration device according to claim 6, characterized in that the diameter of the first outer cylinder (10) is smaller than the diameter of the second outer cylinder (11), the diameter of the third outer cylinder (14) is smaller than the diameter of the second outer cylinder (11), the first outer cylinder (10) and the second outer cylinder (11) are connected by a first taper cylinder (20), and the third outer cylinder (14) and the second outer cylinder (11) are connected by a second taper cylinder (21).
8. A magnetic refrigeration device according to claim 1, characterized in that the permanent magnet magnetic field generator (5) comprises a permanent magnet stator (12) and a permanent magnet rotor (13), the permanent magnet rotor (13) is rotatably sleeved in the permanent magnet stator (12) and forms a working area with the permanent magnet stator (12), the permanent magnet stator (12) is formed by splicing a plurality of magnets into a circular ring shape, and/or the permanent magnet rotor (13) is formed by splicing a plurality of magnets.
9. A magnetic refrigeration device according to claim 8, characterized in that the permanent magnet rotor (13) comprises first rotor magnets (131) and second rotor magnets (132), the first rotor magnets (131) and second rotor magnets (132) being arranged alternately in the circumferential direction, the magnetic field strength of the first rotor magnets (131) being greater than the magnetic field strength of the second rotor magnets (132).
10. A magnetic refrigeration device according to claim 8, characterized in that the plurality of magnets of the permanent magnet stator (12) form a Halbach array and the plurality of magnets of the permanent magnet rotor (13) form a Halbach array.
11. A magnetic refrigeration device according to claim 10, characterized in that the magnets of the permanent magnet stator (12) and the permanent magnet rotor (13) are segmented based on the distribution of the equipotential lines of the magnetic field using a topological optimization algorithm.
12. A magnetic refrigeration device according to claim 2, characterized in that the first magnetocaloric unit (4) is filled with a low-temperature stage magnetocaloric material, the second magnetocaloric unit (6) is filled with a normal-temperature stage magnetocaloric material, and the third magnetocaloric unit (9) is filled with a high-temperature stage magnetocaloric material, and the curie temperatures of the low-temperature stage magnetocaloric material, the normal-temperature stage magnetocaloric material, and the high-temperature stage magnetocaloric material increase progressively.
13. The magnetic refrigerator according to claim 12, wherein the working temperature zone of the low-temperature-zone magnetocaloric material is a to b, the working temperature zone of the normal-temperature-zone magnetocaloric material is b to c, and the working temperature zone of the high-temperature-zone magnetocaloric material is c to d, wherein a < b < c < d.
14. A magnetic refrigeration device according to claim 2, characterized in that the first magnetic refrigeration assembly (1) and the third magnetic refrigeration assembly (7) each adopt a single bed structure.
15. A magnetic refrigeration system comprising a magnetic refrigeration device, characterized in that the magnetic refrigeration device is a magnetic refrigeration device according to any one of claims 1 to 14.
16. A magnetic refrigeration system according to claim 15, characterized in that it further comprises a drive pump (15), a first heat exchanger (16) and a second heat exchanger (17), the second heat exchanger (17) being arranged at the inlet end of the drive pump (15), the magnetic refrigeration device being arranged at the outlet end of the drive pump (15), the first heat exchanger (16) being arranged between the outlet of the magnetic refrigeration device and the second heat exchanger (17), a bypass line being arranged in parallel with the first heat exchanger (16) between the outlet of the magnetic refrigeration device and the second heat exchanger (17), through which bypass line or through which first heat exchanger (16) the heat exchange fluid can flow selectively to the second heat exchanger (17).
17. A magnetic refrigeration system according to claim 16, characterized in that a control valve (18) is further arranged between the magnetic refrigeration device and the drive pump (15), the control valve (18) being capable of controlling the flow path of the heat exchange fluid within the magnetic refrigeration device.
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| CN202022512557.7U CN213631054U (en) | 2020-11-03 | 2020-11-03 | Magnetic refrigeration device and magnetic refrigeration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112229087A (en) * | 2020-11-03 | 2021-01-15 | 珠海格力电器股份有限公司 | Magnetic refrigeration device, magnetic refrigeration system and magnetic refrigeration control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229087A (en) * | 2020-11-03 | 2021-01-15 | 珠海格力电器股份有限公司 | Magnetic refrigeration device, magnetic refrigeration system and magnetic refrigeration control method |
| CN112229087B (en) * | 2020-11-03 | 2024-04-05 | 珠海格力电器股份有限公司 | Magnetic refrigeration device, magnetic refrigeration system and magnetic refrigeration control method |
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