CN106931688B - Parallel infinitesimal regenerative system for room temperature magnetic refrigeration - Google Patents
Parallel infinitesimal regenerative system for room temperature magnetic refrigeration Download PDFInfo
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- CN106931688B CN106931688B CN201710148910.8A CN201710148910A CN106931688B CN 106931688 B CN106931688 B CN 106931688B CN 201710148910 A CN201710148910 A CN 201710148910A CN 106931688 B CN106931688 B CN 106931688B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses a parallel micro-element heat regenerative system for room temperature magnetic refrigeration, which comprises a motor, a transmission device, a magnetic refrigeration heat regenerator, a cold end heat conduction heat exchanger connected with a heat absorption area of the magnetic refrigeration heat regenerator, and a hot end heat conduction heat exchanger connected with a heat release area of the magnetic refrigeration heat regenerator, wherein the magnetic refrigeration heat regenerator comprises an upper cover plate and a lower cover plate which are provided with high-temperature area heat conduction holes and low-temperature area heat conduction holes, at least two rotary magnetic refrigeration heat regenerator modules which are distributed at 180 degrees and have opposite rotation directions are coaxially overlapped between the upper cover plate and the lower cover plate, and an interlayer lubricating heat conduction module is also arranged between adjacent magnetic refrigeration heat regenerator modules. The invention effectively reduces the heat regeneration loss in the heat regenerator, avoids the corrosion generated by the contact of the working medium and the heat exchange fluid, reduces the pumping power consumption of the heat exchange fluid and other problems; through the parallel connection of the multiple layers of heat regenerator modules, the magnetic treatment quality of the magnetocaloric materials in unit time of the system is improved, the heat transfer rate between beds is increased, and the refrigeration capacity of the system can be further improved.
Description
Technical Field
The invention relates to the technical field of novel refrigeration, in particular to a parallel infinitesimal regenerative system for room-temperature magnetic refrigeration.
Background
Energy is the basis for human survival, and with the continuous increase of world primary energy consumption, reducing energy consumption and utilizing natural energy become important directions of scientific research. With the improvement of living standard of people, refrigeration technology has gone into thousands of households. The refrigeration technology mainly comprises vapor compression refrigeration, thermoelectric refrigeration, thermoacoustic refrigeration, vortex tube refrigeration, adsorption refrigeration, magnetic refrigeration and the like. The room temperature magnetic refrigeration technology is a novel refrigeration technology based on the giant Magnetocaloric Effect (MCE) of a Magnetocaloric material in a room temperature region. Compared with the traditional vapor compression refrigeration, the magnetic refrigeration is regarded as one of the most potential technologies for replacing the traditional vapor compression refrigeration cycle by virtue of the advantages of environmental protection and high efficiency. In terms of mechanical reliability and compactness, the magnetic refrigeration adopts the permanent magnet to provide a magnetic field, and has low running frequency, less mechanical vibration, low working noise, high mechanical reliability and long service life. And the structure of the refrigerating device can become more compact and safer because the magnetic entropy density is larger than that of gas. In the aspect of energy utilization rate, the heat efficiency of the traditional steam compressor can only reach 5% -10% of that of a Carnot cycle, the magnetic refrigeration cycle can reach 30% -60%, and the energy-saving effect is obvious. Therefore, the room temperature magnetic refrigeration technology has quite good application prospect. Researchers in various countries have conducted extensive research on magnetic refrigeration technology.
The active heat regenerator mainly used at the present stage is limited under the condition that the magnetocaloric effect of the magnetocaloric material at the present stage is insufficient under the limited field intensity of the permanent magnet, and the magnetocaloric property is used as the heat regeneration material in the process that the heat exchange fluid is brought out of the magnetocaloric material in a forced convection mode to generate heat and cold, and the lattice entropy in the circulation process is stored and released. Therefore, the available quantity of the magnetic entropy is greatly increased under the condition of a certain external field. The temperature in the active heat regenerator is accumulated for multiple times to form a certain temperature gradient, so that the temperature span between the hot end and the cold end is widened, and the cold quantity is provided for the environment at a certain temperature. However, in the actual use process, especially after the temperature span of the cold end and the hot end is increased, the cold carrier fluid and the magnetocaloric working medium can cause the thermal short circuit between the cold end and the hot end, thereby causing the loss of refrigerating capacity or heating capacity; in addition, the efficiency of each infinitesimal overlapping circulating heat return in the active heat regenerator is reduced, so that the refrigeration power of the existing room-temperature magnetic refrigeration system is low under a large-temperature span. Therefore, a more efficient active heat regenerator system is designed, so that the room temperature magnetic refrigeration technology still has the substantive significance for the work of keeping larger refrigerating capacity and heating capacity under large temperature span.
Disclosure of Invention
In view of the above technical problems, the present invention provides a parallel infinitesimal regenerative system for room temperature magnetic refrigeration, which actively regenerates heat under self-driven temperature difference according to the magnetocaloric effect principle and the room temperature magnetic refrigeration regenerative cycle.
The invention is realized by adopting the following technical scheme:
the utility model provides a little first backheat system that connects for room temperature magnetic refrigeration, includes motor, transmission, magnetic refrigeration regenerator, connects the cold junction heat conduction heat exchanger in magnetic refrigeration regenerator heat absorption district, connects the hot junction heat conduction heat exchanger in magnetic refrigeration regenerator heat release district, the magnetic refrigeration regenerator is including the circular upper cover plate and the lower apron that are provided with high temperature region heat conduction hole and low temperature region heat conduction hole, upper cover plate and lower apron between coaxial stack be provided with at least two-layer each other be 180 degrees distribution and revolve to opposite rotation type magnetic refrigeration regenerator module, still be provided with the lubricated heat conduction module between the adjacent magnetic refrigeration regenerator module between the layer.
Furthermore, the rotary magnetic refrigeration heat regenerator module comprises a fixed arc-shaped permanent magnet magnetic field, a heat regenerator movable disc rotating and penetrating through the permanent magnet magnetic field, and a magnetocaloric working medium filling bed layer uniformly embedded on the heat regenerator movable disc.
Furthermore, the magnetic field of the permanent magnet comprises an outer magnet and an inner magnet, the outer magnet and the inner magnet are respectively two concentric semicircular rings, the outer circular arc surface of the inner magnet is opposite to the inner circular arc surface of the outer magnet, and an arc-shaped high magnetic field area gap matched with the moving disc of the heat regenerator in a clearance fit mode is formed.
Furthermore, the width of the arc-shaped high magnetic field region gap is 10-40 mm.
Furtherly, the regenerator driving disk for the circular form magnetism nature working medium dish of circle, form by low coefficient of heat conductivity material processing, the hole of regenerator driving disk be provided with the internal tooth, the circumferencial direction of regenerator driving disk on evenly be covered with a plurality of and be used for the assembly the fan-shaped through-hole of magnetism nature working medium packing bed is equipped with adiabatic baffle between two adjacent fan-shaped through-holes, prevents to leak heat each other between the heat nature material of magnetism in the fan-shaped through-hole and causes the inside hot short circuit of magnetism nature working medium dish.
Further, the height of the fan-shaped through hole is 10mm-80mm.
Furthermore, the shape of the magnetocaloric working medium filling bed layer is matched with that of the fan-shaped through hole.
Furthermore, the interlayer lubricating heat-conducting module is annular, and an annular guide rail is arranged in the middle of the interlayer lubricating heat-conducting module.
Furthermore, fan-shaped through holes are formed in the annular guide rail along the circumferential direction, fan-shaped heat-conducting lubricating blocks or heat pipe heat exchangers with certain wear resistance and heat conductivity coefficients are filled in the fan-shaped through holes, and the number of the fan-shaped through holes is the same as that of the magnetic thermal material filling bed layers in the moving disc of the heat regenerator.
Further, the fan-shaped heat-conducting lubricating block is made of graphite, ceramic, graphite foam copper or graphene.
Compared with the prior art, the invention has the following beneficial effects:
compared with the common magnetic heat regenerator, the parallel micro-element regenerative rotary room temperature magnetic refrigeration system has higher and controllable regenerative efficiency, thereby reducing the refrigeration loss caused by irreversible factors in the regenerative process and fully exerting the refrigeration efficiency of the magnetocaloric working medium. In addition, the multi-stage heat regenerator parallel system is adopted, so that the internal heat transfer efficiency of the heat regenerators can be effectively improved, the quality of the magnetic treatment magnetocaloric materials of the system in unit time is increased, and the sufficient refrigerating output of the system is ensured. In the internal heat return process of the heat regenerator, solid-solid heat return under temperature difference driving is adopted, so that the problems of extra power consumption generated when the pumped cold carrier fluid realizes heat return flow, corrosion performance attenuation of the magnetic thermal working medium caused by contact of the cold carrier fluid and the magnetic thermal working medium and the like are avoided, and therefore, the system performance and the service life of the room-temperature magnetic heat pump system can be effectively improved.
Drawings
FIG. 1 is a schematic structural decomposition diagram of a parallel micro-element regenerative system.
FIG. 2 is a schematic diagram of a single-layer regenerator module.
Fig. 3 is a schematic structural diagram of two adjacent layers of regenerator modules.
Fig. 4 is a schematic structural diagram of an interlayer lubricating heat-conducting module.
FIG. 5 is a schematic diagram of the relationship among the magnetic field distribution region, the rotation direction and the heat conduction regenerative of the parallel micro-element regenerative system.
Shown in the figure: 101-an upper cover plate; 102-high temperature zone heat conduction holes; 103-heat conduction holes in low temperature areas; 2-a first rotary magnetic refrigeration heat regenerator module; 201-external magnets; 202-an inner magnet; 2031-filling bed with magnetocaloric working medium; 2032-a heat regenerator moving disk; 3-interlayer lubricating heat-conducting module; 301-fan shaped heat conducting lubricating block; 302-ring guide; 4-a second rotary magnetic refrigeration heat regenerator module; 5-a third rotary magnetic refrigeration heat regenerator module; 6-a fourth rotary magnetic refrigeration heat regenerator module; 7-lower cover plate.
Detailed Description
The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.
Fig. 1 is an exploded view of the present invention, with mechanical transmission omitted.
The utility model provides a little first backheat system of parallelly connected for room temperature magnetic refrigeration, includes motor, transmission, magnetic refrigeration regenerator, connects the cold junction heat conduction heat exchanger in magnetic refrigeration regenerator heat absorption area, connect the hot junction heat conduction heat exchanger in magnetic refrigeration regenerator heat release area, the magnetic refrigeration regenerator is including the circular upper cover plate 101 and the lower apron 7 that are provided with high temperature region heat conduction hole 102 and low temperature region heat conduction hole 103, upper cover plate 101 and lower apron 7 between coaxial stack be provided with at least four layers each other be 180 degrees distributions and revolve to opposite rotation type magnetic refrigeration regenerator module: the heat recovery device comprises a first rotary magnetic refrigeration heat regenerator module 2, a second rotary magnetic refrigeration heat regenerator module 4, a third rotary magnetic refrigeration heat regenerator module 5, a fourth rotary magnetic refrigeration heat regenerator module 6, and an interlayer lubricating heat conduction module 3 arranged between the adjacent magnetic refrigeration heat regenerator modules.
Specifically, as shown in fig. 2, taking the first rotary magnetic refrigeration heat regenerator module 2 as an example, the first rotary magnetic refrigeration heat regenerator module 2 includes a stationary arc-shaped permanent magnet magnetic field, a heat regenerator rotor 2032 rotating and passing through the permanent magnet magnetic field, and a magnetocaloric working medium filling bed 2031 uniformly embedded on the heat regenerator rotor 2032.
Specifically, the permanent magnet magnetic field includes an outer magnet 201 and an inner magnet 202, the outer magnet 201 and the inner magnet 202 are respectively two concentric semicircular rings, and an outer arc surface of the inner magnet 202 is opposite to an inner arc surface of the outer magnet 201 to form an arc-shaped high magnetic field area gap in clearance fit with the regenerator moving disk. The width of the arc-shaped high magnetic field region gap is 10-40 mm.
Specifically, regenerator driving disk 2032 be the annular magnetic heat nature working medium dish of circle, form by low coefficient of heat conductivity material processing, regenerator driving disk 2032's hole be provided with the internal tooth, the motor is connected to the external gear that the internal tooth passes through transmission, transmission can be opposite through the certain rotational speed of the activity of regenerator driving disk 2032 that corresponding gear train and ratio made, and suitable gear train and ratio can be selected as required to the technical personnel in the field, no longer describe herein. And a plurality of fan-shaped through holes for assembling the magnetocaloric working medium filling bed layer 2031 are uniformly distributed in the circumferential direction of the moving disc of the heat regenerator, and the height of each fan-shaped through hole is 10-80 mm. And a heat insulation partition plate is arranged between every two adjacent fan-shaped through holes, so that the internal thermal short circuit of the magnetic thermal working medium plate caused by mutual heat leakage between the magnetic thermal materials in the fan-shaped through holes is prevented. The shape of the magnetocaloric working medium filling bed 2031 is matched with the shape of the fan-shaped through hole, and the magnetocaloric working medium filling bed is formed by mixing and pressing a high thermal conductive filler and a magnetocaloric material.
Specifically, as shown in fig. 4, the interlayer lubricating and heat conducting module 3 is annular, and an annular guide rail 302 is provided in the middle. The annular guide rail 302 is circumferentially provided with fan-shaped through holes, fan-shaped heat-conducting lubricating blocks 301 or heat pipe heat exchangers with certain wear resistance and heat conductivity coefficients are filled in the fan-shaped through holes, and the number of the fan-shaped through holes is the same as that of the magnetocaloric material filling beds 2031 in the movable disc 2032 of the heat regenerator. The fan-shaped heat-conducting lubricating block 301 is made of high-heat-conductivity-coefficient materials such as graphite, ceramics, graphite foam copper or graphene.
The regenerator in each layer of rotary magnetic refrigeration regenerator module moves the axial direction of coiling system and carries out clockwise rotation or anticlockwise rotation, and the direction of rotation of the regenerator movable disk in the adjacent rotary magnetic refrigeration regenerator module is opposite moreover for bed 2031 is filled to each magnetism nature working medium in the cyclic annular regenerator movable disk 2032 and periodically gets into magnetic field magnetization and withdraw from magnetic field demagnetization, forms the regenerator movable disk rotation, magnet rigid motion form.
The rotating directions of the regenerator moving disks 2032 of two adjacent layers are opposite, and the rotary magnetic refrigeration regenerator modules of each layer are combined in a parallel stacking manner. The structure of the rotary magnetic refrigeration heat regenerator module of the two adjacent layers is shown in the attached drawing 3, taking a first rotary magnetic refrigeration heat regenerator module 2 and a second rotary magnetic refrigeration heat regenerator module 4 as an example, in the process of reverse rotation of the upper and lower two heat regenerator moving disks, the heat conduction heat regeneration under the temperature difference driving is carried out by the magnetic thermal working medium filling bed layers 2031 at the corresponding positions up and down through the interlayer lubricating heat conduction module 3. And the high magnetic field region overlapping region in the upper and lower layers of heat regenerator modules is a high-temperature heat release region of the system. And the overlapping area of the low magnetic field regions in the upper and lower two layers of rotary magnetic refrigeration heat regenerator modules is a low-temperature heat absorption area of the system. The sizes of the high-temperature heat release area and the low-temperature heat absorption area can be controlled by controlling the angle of the overlapped area.
In the parallel micro-element regenerative rotary room temperature magnetic refrigeration system, a schematic diagram of the relationship among the magnetic field distribution area, the rotation direction and the heat conduction regenerative of each layer of rotary magnetic refrigeration regenerator module is shown in fig. 5. The heat transfer area of the system is connected through the hot end heat transfer heat exchanger, the heat absorption area of the system is connected through the cold end heat transfer heat exchanger, and the other areas of the heat regenerator, the magnetocaloric working medium filling bed layers 2031 and the magnetocaloric working medium filling bed layers 2031 at the corresponding positions are subjected to limited-time heat regeneration through the interlayer lubricating heat transfer module 3, so that heat is efficiently released to the hot end, and the heat is absorbed from the cold end in a reverse magnetic circulation manner.
The regenerator moving disk of this embodiment can rotate in the gap formed by the outer magnet 201 and the inner magnet 202, and the magnetocaloric working medium in the sector through hole of the regenerator moving disk periodically enters and leaves the high magnetic field area formed by the outer magnet 201 and the inner magnet 202 in the bed 2031. The regenerator moving discs of each layer slide between the annular guide rails 302 in the interlayer lubricating heat-conducting module 3. The magnetocaloric working medium filling bed layers 2031 in the moving disks of the heat regenerators are driven by temperature difference to perform spontaneous heat conduction and heat balance through the fan-shaped heat conduction lubricating blocks 301 of the interlayer lubricating and heat conduction modules 3, and the heat regeneration loss is reduced under the multi-stage heat regeneration effect. Through the parallel connection of the multilayer rotary type magnetic refrigeration heat regenerator modules, the magnetic treatment quality of the magnetic thermal material in unit time of the system can be effectively improved, and the heat conduction efficiency of the magnetic thermal working medium filling bed layer is improved, so that the refrigerating capacity of the system is improved.
The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A parallel infinitesimal regenerative system for room temperature magnetic refrigeration is characterized in that: the magnetic refrigeration heat regenerator comprises a motor, a transmission device, a magnetic refrigeration heat regenerator, a cold end heat conduction heat exchanger connected with a heat absorption area of the magnetic refrigeration heat regenerator, and a hot end heat conduction heat exchanger connected with a heat release area of the magnetic refrigeration heat regenerator, wherein the magnetic refrigeration heat regenerator comprises a circular upper cover plate (101) and a circular lower cover plate (7) which are provided with a high-temperature area heat conduction hole (102) and a low-temperature area heat conduction hole (103), at least two rotary magnetic refrigeration heat regenerator modules which are distributed at 180 degrees and have opposite rotation directions are coaxially overlapped between the upper cover plate (101) and the lower cover plate (7), the motor is in driving connection with the rotary magnetic refrigeration heat regenerator modules through the transmission device, and an interlayer lubricating heat conduction module (3) is further arranged between adjacent magnetic refrigeration heat regenerator modules;
rotation type magnetic refrigeration regenerator module include stationary arc permanent magnet magnetic field, rotatory regenerator driving disk (2032) that passes the permanent magnet magnetic field, evenly imbed bed (2031) is filled to magnetism heat nature working medium on regenerator driving disk (2032), is provided with the internal tooth on regenerator driving disk (2032), the motor is connected to the external gear that the internal tooth passes through transmission, transmission makes regenerator driving disk (2032) certain rotational speed of activity and rotation direction opposite through corresponding gear and ratio.
2. The parallel micro-element regenerative system for room-temperature magnetic refrigeration according to claim 1, wherein: the permanent magnet magnetic field comprises an outer magnet (201) and an inner magnet (202), the outer magnet (201) and the inner magnet (202) are two concentric semicircular rings respectively, the outer arc surface of the inner magnet (202) is opposite to the inner arc surface of the outer magnet (201), and an arc-shaped high magnetic field area gap matched with the regenerator moving disc in a gap mode is formed.
3. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 2, wherein: the width of the arc-shaped high magnetic field region gap is 10-40 mm.
4. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 1, wherein: regenerator driving disk (2032) for the annular magnetic heat nature working medium dish of circle, form by low coefficient of heat conductivity material processing, the hole of regenerator driving disk (2032) be provided with the internal tooth, the circumferencial direction of regenerator driving disk on evenly be covered with a plurality of and be used for the assembly the fan-shaped through-hole of the hot working medium filling bed of magnetism (2031), be equipped with adiabatic baffle between two adjacent through-holes.
5. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 4, wherein: the height of the fan-shaped through hole is 10mm-80mm.
6. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 4, wherein: the shape of the magnetocaloric working medium filling bed layer (2031) is matched with the shape of the fan-shaped through hole.
7. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 1, wherein: the interlayer lubricating heat conduction module (3) is in a circular ring shape, and an annular guide rail (302) is arranged in the middle.
8. The parallel micro-element regenerative system for room temperature magnetic refrigeration according to claim 7, wherein: the annular guide rail (302) is provided with fan-shaped through holes along the circumferential direction, fan-shaped heat conduction lubricating blocks (301) or heat pipe heat exchangers with certain wear resistance and heat conductivity coefficients are filled in the fan-shaped through holes, and the number of the fan-shaped through holes is the same as that of the magnetic thermal working medium filling beds (2031) in the heat regenerator moving disc (2032).
9. The parallel micro-element regenerative system for room-temperature magnetic refrigeration according to claim 8, wherein: the fan-shaped heat-conducting lubricating block (301) is made of graphite, ceramic, graphite foam copper or graphene.
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| US11092364B2 (en) * | 2018-07-17 | 2021-08-17 | Haier Us Appliance Solutions, Inc. | Magneto-caloric thermal diode assembly with a heat transfer fluid circuit |
| CN110864471B (en) * | 2019-11-27 | 2021-06-08 | 横店集团东磁股份有限公司 | Magnetic refrigeration device with transmission power, method and application |
| CN113494785B (en) * | 2020-04-07 | 2022-05-24 | 中国科学院物理研究所 | All-solid-state magnetic refrigeration device and use method and application thereof |
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| CN201225796Y (en) * | 2008-06-03 | 2009-04-22 | 华南理工大学 | Active regenerator for ethyl hydrate water solution porous evaporated room temperature magnetic refrigerating device |
| CN101788207B (en) * | 2009-12-29 | 2011-09-21 | 华南理工大学 | Microchannel enhanced heat exchange system of rotary room-temperature magnetic refrigerator and heat transfer method thereof |
| CN101979937B (en) * | 2010-10-15 | 2012-05-23 | 西安交通大学 | Rotary magnetic refrigeration device and application thereof |
| GB201111235D0 (en) * | 2011-06-30 | 2011-08-17 | Camfridge Ltd | Multi-Material-Blade for active regenerative magneto-caloric or electro-caloricheat engines |
| CN203216145U (en) * | 2013-03-06 | 2013-09-25 | 包头稀土研究院 | Magnetic refrigerating part and magnetic refrigerator |
| CN103822412A (en) * | 2014-02-28 | 2014-05-28 | 华南理工大学 | Active heat regenerator for room temperature magnetic refrigerator |
| CN206695450U (en) * | 2017-03-14 | 2017-12-01 | 华南理工大学 | A kind of infinitesimal heat regenerative system in parallel for room temperature magnetic refrigerating |
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