CN112066589A - Magnetic refrigeration system - Google Patents
Magnetic refrigeration system Download PDFInfo
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- CN112066589A CN112066589A CN202010894100.9A CN202010894100A CN112066589A CN 112066589 A CN112066589 A CN 112066589A CN 202010894100 A CN202010894100 A CN 202010894100A CN 112066589 A CN112066589 A CN 112066589A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention relates to a magnetic refrigeration system, which comprises a magnet mechanism, a magnetic heat regenerator, a high-temperature heat exchanger and a low-temperature heat exchanger, wherein the magnet mechanism is arranged on the magnetic heat regenerator; the magnetic heat regenerator comprises a plurality of magnetic working media, the Curie temperatures of the magnetic working media are different, and the magnetic working media are sequentially connected according to the Curie temperatures of the magnetic working media; different magnetic working media can be freely combined to enable the magnetic heat regenerator to form a plurality of temperature zones with different temperature ranges, and each temperature zone is matched with at least one corresponding magnetic working medium; all the magnetic working media matched with each temperature zone respectively form a closed loop which corresponds to each temperature zone and is used for allowing heat exchange fluid to flow with the high-temperature heat exchanger and the low-temperature heat exchanger; the magnet mechanism is positioned on one side of the magnetic heat regenerator and used for generating a magnetic field, and the magnet mechanism can move towards the direction close to or far away from all the magnetic working media matched with different temperature zones, so that all the magnetic working media matched with different temperature zones are excited and demagnetized.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a magnetic refrigeration system.
Background
The magnetocaloric effect is a thermal effect in which the temperature of a magnetocaloric material increases during the entry into a magnetic field and decreases during the exit from the magnetic field. Materials with such thermal effects are called magnetocaloric materials, and usually magnetocaloric materials have the strongest magnetocaloric effect around their curie temperature. However, since the temperature range of the magnetic regenerator of the conventional magnetic refrigeration system is narrow, when the ambient temperature of the magnetic refrigeration system changes, the magnetocaloric material in the magnetic regenerator deviates from the optimal operating temperature range, so that the operating efficiency of the magnetic refrigeration system is reduced.
Disclosure of Invention
Based on the magnetic refrigeration system, the magnetic refrigeration system capable of adapting to different environmental temperatures for operation is provided.
A magnetic refrigeration system comprises a magnet mechanism, a magnetic heat regenerator, a high-temperature heat exchanger and a low-temperature heat exchanger; the magnetic heat regenerator comprises a plurality of magnetic working media, the Curie temperatures of the magnetic working media are different, and the magnetic working media are sequentially connected according to the sequence of the Curie temperatures of the magnetic working media; different magnetic working media can be freely combined to enable the magnetic heat regenerator to form a plurality of temperature zones with different temperature ranges, and each temperature zone is matched with at least one corresponding magnetic working medium; all the magnetic working media matched with the temperature zones respectively form a closed loop which corresponds to each temperature zone and is used for heat exchange fluid to flow with the high-temperature heat exchanger and the low-temperature heat exchanger; the magnet mechanism is positioned on one side of the magnetic heat regenerator and used for generating a magnetic field, and the magnet mechanism can move towards the direction close to or far away from all the magnetic working media matched with different temperature zones, so that all the magnetic working media matched with different temperature zones are excited and demagnetized;
when all the magnetic working media matched with the temperature zone are excited, the temperature of all the currently excited magnetic working media is increased, and the heat exchange fluid can flow through all the currently excited magnetic working media from the low-temperature heat exchanger to the high-temperature heat exchanger and emit heat; when all the magnetic working media matched with the temperature zone are demagnetized, the temperature of all the currently excited magnetic working media is reduced, and the heat exchange fluid can flow through all the currently demagnetized magnetic working media from the high-temperature heat exchanger to the low-temperature heat exchanger and emit cold.
Preferably, the magnetic regenerator comprises four magnetic working media, the four magnetic working media are respectively a first magnetic working medium, a second magnetic working medium, a third magnetic working medium and a fourth magnetic working medium, the first magnetic working medium, the second magnetic working medium, the third magnetic working medium and the fourth magnetic working medium are sequentially connected according to the high-low order of the curie temperature of the first magnetic working medium, the second magnetic working medium, the third magnetic working medium and the fourth magnetic working medium, the first magnetic working medium, the second magnetic working medium, the third magnetic working medium and the fourth magnetic working medium can be freely combined to enable the magnetic regenerator to form three temperature zones, the three temperature zones are respectively a high temperature zone, a middle temperature zone and a low temperature zone, the high temperature zone is matched with the first magnetic working medium and the second magnetic working medium, the middle temperature zone is matched with the second magnetic working medium and the third magnetic working medium, and the low temperature zone is matched with the third magnetic working medium and the fourth magnetic working medium.
Preferably, the magnetic refrigeration system further comprises a power mechanism, the power mechanism is connected between the high-temperature heat exchanger and the low-temperature heat exchanger, and the power mechanism is used for driving the heat exchange fluid to flow in a corresponding closed loop formed by the high-temperature heat exchanger, the low-temperature heat exchanger and all the magnetic working media matched with the temperature regions.
Preferably, the power mechanism includes:
the liquid storage chamber is connected between the high-temperature heat exchanger and the low-temperature heat exchanger and is used for containing the heat exchange fluid;
the piston rod is sleeved in the liquid storage chamber; and
the drive source is connected with the piston rod and used for driving the piston rod to move in the liquid storage chamber, so that the piston rod drives the heat exchange fluid in the liquid storage chamber to flow, and further drives the heat exchange fluid to flow in the high-temperature heat exchanger, the low-temperature heat exchanger and all the corresponding closed loops formed by the magnetic working media matched with the temperature regions.
Preferably, the magnetic refrigeration system further comprises a pipeline mechanism, the high-temperature heat exchanger, the low-temperature heat exchanger and all the magnetic media matched with the temperature zones are connected in a closed loop mode through the pipeline mechanism, and the pipeline mechanism is used for transmitting the heat exchange fluid.
Preferably, the piping mechanism includes:
the high-temperature heat exchanger, the low-temperature heat exchanger and all the magnetic working media matched with the temperature zones are connected in a closed loop mode through the circulation pipes, and the circulation pipes are used for transmitting the heat exchange fluid; and
and the control valve is arranged on the circulating pipe and can be opened or closed so as to control the circulation and the stop of the heat exchange fluid relative to the circulating pipe.
Preferably, the magnet mechanisms comprise two groups, the two groups of magnet mechanisms are oppositely arranged at intervals, and the magnetic heat regenerator is arranged between the two groups of magnet mechanisms.
Preferably, the magnet mechanism comprises:
the first sliding rail is positioned on one side of the magnetic heat regenerator and extends along a first direction;
the second sliding rail is connected with the first sliding rail in a sliding mode and extends along a second direction perpendicular to the first direction;
the magnet is used for generating a magnetic field and is connected with the second sliding rail in a sliding manner; and
and the driving piece is in transmission connection with the magnet and is used for driving the magnet to move along the first sliding rail and the second sliding rail so as to enable the magnet to be close to or far away from all the magnetic working media matched with different temperature zones.
Preferably, the magnetic refrigeration system further comprises at least one of:
a controller for controlling the operation of the various mechanisms of the magnetic refrigeration system; and
and the temperature sensor is used for detecting the ambient temperature of the magnetic refrigeration system.
Preferably, the number of the magnetic media matched with each temperature zone of the magnetic heat regenerator is the same, and the length of the magnet is equal to the total length of all the magnetic media matched with each temperature zone of the magnetic heat regenerator.
The magnetic refrigeration system provided by the invention has the advantages that the magnetic heat regenerator comprises a plurality of magnetic working media with different Curie temperature points, and the plurality of magnetic working media are sequentially connected according to the sequence of the Curie temperatures of the magnetic working media; the magnetic refrigerator can be used for freely combining different magnetic media to enable the magnetic regenerator to form a plurality of temperature areas with different temperature ranges, and the driving magnet mechanism can move towards the direction close to or far away from all the magnetic media matched with the different temperature areas, so that all the magnetic media matched with the different temperature areas are excited and demagnetized, all the magnetic media matched with the corresponding temperature areas can participate in magnetic refrigeration circulation, the acting temperature areas of the magnetic regenerator are effectively widened, the operating temperature range of the magnetic refrigeration system is effectively expanded, the magnetic refrigeration system can better cope with the change of the ambient temperature of the magnetic refrigeration system, the stable operation of the magnetic refrigeration system is ensured, and better refrigeration effect is realized.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic refrigeration system in an embodiment.
The meaning of the reference symbols in the drawings is:
10-a magnetic refrigeration system; 100-a magnet mechanism; 110-a magnet; 200-magnetic heat regenerator; 210-a magnetic working medium; 211-a first magnetic working medium; 212-a second magnetic working medium; 213-a third magnetic working medium; 214-a fourth magnetic working medium; 220-a housing; 300-high temperature heat exchanger; 400-a low temperature heat exchanger; 500-a power mechanism; 520-a reservoir; 540-a piston rod; 560-a drive source; 600-a pipeline mechanism; 620-flow-through tubes; 640-a control valve; 641-a first control valve; 642-a second control valve; 643-a third control valve; 644 — fourth control valve; 645 — fifth control valve; 646-a sixth control valve; 700-temperature sensor.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, the magnetic refrigeration system 10 in one embodiment includes a magnet mechanism 100, a magnetic regenerator 200, a high temperature heat exchanger 300, and a low temperature heat exchanger 400; the magnetic heat regenerator 200 comprises a plurality of magnetic working media 210, Curie temperatures of the magnetic working media 210 are different, and the magnetic working media 210 are sequentially connected according to the Curie temperatures of the magnetic working media; different magnetic media 210 can be freely combined to enable the magnetic heat regenerator 200 to form a plurality of temperature zones with different temperature ranges, and each temperature zone is matched with at least one corresponding magnetic media 210; all the magnetic media 210 matched with each temperature zone form a closed loop corresponding to each temperature zone and used for heat exchange fluid to flow with the high-temperature heat exchanger 300 and the low-temperature heat exchanger 400 respectively.
The magnet mechanism 100 is located at one side of the magnetic regenerator 200 and is used for generating a magnetic field, and the magnet mechanism 100 can move towards a direction close to or far away from all the magnetic media 210 matched with different temperature zones, so as to excite and demagnetize all the magnetic media 210 matched with different temperature zones. When all the magnetic working media 210 matched with the temperature zone are excited, the temperature of all the magnetic working media 210 excited at present is increased, and the heat exchange fluid can flow through all the magnetic working media 210 excited at present from the low-temperature heat exchanger 400 to the high-temperature heat exchanger 300 and emit heat; when all the magnetic media 210 with the temperature zones matched are demagnetized, the temperature of all the currently excited magnetic media 210 is reduced, and the heat exchange fluid can flow through all the currently demagnetized magnetic media 210 from the high-temperature heat exchanger 300 to the low-temperature heat exchanger 400 and emit cold.
In the magnetic refrigeration system 10 provided by the invention, the magnetic heat regenerator 200 comprises a plurality of magnetic working media 210 with different Curie temperature points, and the plurality of magnetic working media 210 are sequentially connected according to the sequence of the Curie temperatures; different magnetic media 210 can be freely combined to enable the magnetic heat regenerator 200 to form a plurality of temperature zones with different temperature ranges, and the driving magnet mechanism 100 can move towards the direction close to or far away from all the magnetic media 210 matched with the different temperature zones, so that all the magnetic media 210 matched with the different temperature zones can be excited and demagnetized, all the magnetic media 210 matched with the corresponding temperature zones can participate in magnetic refrigeration circulation, the acting temperature zones of the magnetic heat regenerator 200 can be effectively widened, the operating temperature range of the magnetic refrigeration system 10 is effectively expanded, the magnetic refrigeration system 10 can be ensured to better cope with the change of the environmental temperature of the magnetic refrigeration system 10, the stable operation of the magnetic refrigeration system 10 is ensured, and a better refrigeration effect is realized.
In an embodiment, the magnetic working media 210 are made of a material having a magnetocaloric effect and an adjustable curie temperature, and a curie temperature difference between adjacent magnetic working media 210 can be adjusted according to actual conditions. In one embodiment, the material of the magnetic working medium 210 is at least one of Gd-based, LaFeSi-based, MnFePAs-based, lacammno-based, and GdGaO-based compounds. In one embodiment, the material of magnetic working medium 210 is preferably GdEr-based, that is, the Curie temperature of Gd-based material can be adjusted by doping the Gd-based material with Er element, and the difference of the doped Er element determines the difference of the Curie temperature. Therefore, the GdEr materials with different curie temperatures form the magnetic working medium 210 with different curie temperatures in the magnetic regenerator 200. Since the magnetocaloric effect of the magnetic medium 210 is the best when the ambient temperature of the magnetic medium 210 is at the curie temperature, compared with the magnetic regenerator 200 made of the magnetic medium 210 with one curie temperature, the magnetic regenerator 200 made of the magnetic medium 210 with different curie temperatures has a wider suitable temperature range for the magnetic medium 210 with different curie temperatures when the ambient temperature of the magnetic refrigeration system 10 is changed, and the overall magnetocaloric effect is better.
In one embodiment, the magnetic regenerator 200 further comprises a housing 220, and the plurality of magnetic media 210 are sequentially arranged in the housing 220 according to the order of curie temperature. In an embodiment, the casing 220 is made of a magnetic conductive heat insulating material, so as to ensure that the magnet mechanism 100 can excite and demagnetize all the magnetic media 210 matched with different temperature regions through the casing 220, and simultaneously ensure that neither heat generated by excitation nor cold generated by demagnetization of the magnetic media 210 is released to the outside through the casing 220. In one embodiment, the housing 220 is preferably made of a plastic material.
In one embodiment, the magnet mechanism 100 includes two sets of magnet mechanisms 100, the two sets of magnet mechanisms 100 are spaced apart from each other, and the magnetic heat regenerator 200 is disposed between the two sets of magnet mechanisms 100.
In one embodiment, the magnet mechanism 100 includes a first slide rail, a second slide rail, a magnet 110 and a driving member, the first slide rail is located at one side of the magnetic heat regenerator 200, and the first slide rail extends along a first direction; the second sliding rail is connected with the first sliding rail in a sliding manner and extends along a second direction perpendicular to the first direction; the magnet 110 is used for generating a magnetic field, and the magnet 110 is connected with the second sliding rail in a sliding manner; the driving member is in transmission connection with the magnet 110, and the driving member is used for driving the magnet 110 to move along the first slide rail and the second slide rail, so that the magnet 110 is close to or far away from all the magnetic working media 210 matched with different temperature zones. In an embodiment, the magnet mechanism 100 further includes a transmission assembly, wherein the driving member is connected to the magnet 110 through the transmission assembly, and the driving member is configured to drive the magnet 110 to move along the first slide rail and the second slide rail through the transmission assembly, so that the magnet 110 is close to or far away from all the magnetic mediums 210 matched in different temperature regions.
In an embodiment, the length of the magnet 110 is less than the total length of all the magnetic media 210 contained in the magnetic heat regenerator 200, and the arrangement is such that the magnet 110 only excites and demagnetizes all the magnetic media 210 that are currently matched with the temperature zone corresponding to the ambient temperature of the magnetic refrigeration system 10, and does not excite and demagnetize other magnetic media 210 in the magnetic heat regenerator 200, which is beneficial to saving the usage amount of the magnet 110 and reducing the cost.
In an embodiment, each magnetic medium 210 in the magnetic heat regenerator 200 has the same shape, the number of magnetic media 210 matched with each temperature zone of the magnetic heat regenerator 200 is the same, and the length of the magnet 110 is equal to the total length of all the magnetic media 210 matched with each temperature zone of the magnetic heat regenerator 200.
In an embodiment, the magnetic refrigeration system 10 further includes a power mechanism 500, the power mechanism 500 is connected between the high temperature heat exchanger 300 and the low temperature heat exchanger 400, and the power mechanism 500 is configured to drive the heat exchange fluid to flow in a corresponding closed loop formed by the high temperature heat exchanger 300, the low temperature heat exchanger 400 and all the magnetic media 210 matching each temperature zone.
In one embodiment, the power mechanism 500 includes a fluid reservoir 520, a piston rod 540 and a driving source 560, the fluid reservoir 520 is connected between the high temperature heat exchanger 300 and the low temperature heat exchanger 400, and the fluid reservoir 520 is used for accommodating a heat exchange fluid; the piston rod 540 is partially sleeved in the fluid reservoir 520; the driving source 560 is connected to the piston rod 540, and the driving source 560 is configured to drive the piston rod 540 to move in the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow, and further drives the heat exchange fluid to flow in a corresponding closed loop formed by the high temperature heat exchanger 300, the low temperature heat exchanger 400, and all the magnetic media 210 matched with each temperature zone.
In an embodiment, the magnetic refrigeration system 10 further includes a pipeline mechanism 600, the high-temperature heat exchanger 300, the low-temperature heat exchanger 400 and all the magnetic media 210 matched with each temperature zone are connected in a closed loop through the pipeline mechanism 600, and the pipeline mechanism 600 is used for transmitting heat exchange fluid.
In one embodiment, the pipeline mechanism 600 includes a flow pipe 620 and a control valve 640, the high temperature heat exchanger 300, the low temperature heat exchanger 400 and all the magnetic media 210 matched with each temperature zone are connected in a closed loop mode through the flow pipe 620, and the flow pipe 620 is used for conveying heat exchange fluid. Specifically, the high-temperature heat exchanger 300, the low-temperature heat exchanger 400, the liquid storage chamber 520 of the power mechanism 500, and all the magnetic media 210 matched with each temperature zone are connected in a closed loop manner through the circulation pipes 620. In one embodiment, the flow tube 620 is made of a heat insulating material to ensure that neither the heat generated by the excitation nor the cold generated by the demagnetization of the magnetic medium 210 is released to the outside through the flow tube 620. The control valve 640 is disposed on the flow pipe 620, and the control valve 640 can be opened or closed to control the flow of the heat exchange fluid through the flow pipe 620.
In an embodiment, the magnetic refrigeration system 10 further includes a temperature sensor 700, and the temperature sensor 700 is configured to detect an ambient temperature of the magnetic refrigeration system 10, so that a user can control the magnet mechanism 100 to move towards a direction close to or away from all the magnetic media 210 matched with the temperature zone corresponding to the temperature data detected by the temperature sensor 700 according to the temperature data detected by the temperature sensor 700, so as to excite and demagnetize all the magnetic media 210 matched with the temperature zone, so that all the magnetic media 210 matched with the temperature zone can participate in a magnetic refrigeration cycle, and stable operation of the magnetic refrigeration system 10 is ensured.
In one embodiment, the magnetic refrigeration system 10 further comprises a controller for controlling the operation of the various mechanisms of the magnetic refrigeration system 10. Specifically, the controller is electrically connected to the temperature sensor 700, the driving source 560, the control valve 640 and the driving member, the temperature sensor 700 is configured to detect an ambient temperature of the magnetic refrigeration system 10 and feed back the obtained temperature data to the controller, and the controller is configured to control operations of the driving source 560, the control valve 640 and the driving member according to the temperature data fed back by the temperature sensor 700, so as to implement automatic operation control of the magnetic refrigeration system 10.
In an embodiment, the magnetic regenerator 200 includes four magnetic media 210, the four magnetic media 210 are respectively a first magnetic medium 211, a second magnetic medium 212, a third magnetic medium 213, and a fourth magnetic medium 214, the first magnetic medium 211, the second magnetic medium 212, the third magnetic medium 213, and the fourth magnetic medium 214 are sequentially connected according to the high-low order of the curie temperature, the first magnetic medium 211, the second magnetic medium 212, the third magnetic medium 213, and the fourth magnetic medium 214 can be freely combined to form three temperature zones of the magnetic regenerator 200, the three temperature zones are respectively a high temperature zone, a medium temperature zone, and a low temperature zone, the high temperature zone matches the first magnetic medium 211 and the second magnetic medium 212, the medium temperature zone matches the second magnetic medium 212 and the third magnetic medium 213, and the low temperature zone matches the third magnetic medium 213 and the fourth magnetic medium 214. That is, the curie temperature of the first magnetic working medium 211 is the lowest, the curie temperature of the fourth magnetic working medium 214 is the highest, and the curie temperatures of the third magnetic working medium 213 and the fourth magnetic working medium 214 are within the temperature range of the high temperature region; the curie temperatures of the second magnetic working medium 212 and the third magnetic working medium 213 are within the temperature range of the middle temperature region; the curie temperatures of the first magnetic working medium 211 and the second magnetic working medium 212 are within the temperature range of the low temperature region.
Further, in an embodiment, six control valves 640 are provided, the six control valves 640 are respectively a first control valve 641, a second control valve 642, a third control valve 643, a fourth control valve 644, a fifth control valve 645 and a sixth control valve 646, the first control valve 641 and the second control valve 642 are provided in a closed loop formed by the first magnetic working medium 211 and the second magnetic working medium 212 matched with the low-temperature region, the high-temperature heat exchanger 300 and the low-temperature heat exchanger 400, the third control valve 643 and the fourth control valve 644 are provided in a closed loop formed by the second magnetic working medium 212 and the third magnetic working medium 213 matched with the medium-temperature region, the high-temperature heat exchanger 300 and the low-temperature heat exchanger 400, and the fifth control valve 646 are provided in a closed loop formed by the third magnetic working medium 213 and the fourth magnetic working medium 214 matched with the high-temperature region, the high-temperature heat exchanger 300 and the low-temperature heat exchanger 400. The controller is electrically connected to the first, second, third, fourth, fifth and sixth control valves 641, 642, 643, 644, 645 and 646.
Specifically, the magnetic refrigeration system 10 provided in the present embodiment specifically works as follows:
when the temperature sensor 700 detects that the ambient temperature of the magnetic refrigeration system 10 is in the temperature range corresponding to the high temperature zone, the controller instructs the driver to drive the magnet 110 to move along the first slide rail and the second slide rail, so that the magnet 110 approaches the third magnetic medium 213 and the fourth magnetic medium 214 matched with the high temperature zone, so that the magnet 110 excites the third magnetic medium 213 and the fourth magnetic medium 214 matched with the high temperature zone, the first magnetic medium 211 and the second magnetic medium 212 do not participate in excitation and demagnetization, the temperatures of the third magnetic medium 213 and the fourth magnetic medium 214 are increased, at this time, the controller instructs the fifth control valve 646 and the sixth control valve 645 to be opened, the other control valves 640 are closed, and simultaneously instructs the drive source 560 to drive the piston rod 540 to move towards the first end of the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the first end of the liquid storage chamber 520, further driving the heat exchange fluid to flow through the third magnetic medium 213 and the fourth magnetic medium 214 from the low temperature heat exchanger 400 to the high temperature heat exchanger 300 and discharging heat;
then, the controller instructs the driving member to drive the magnet 110 to move along the first slide rail and the second slide rail again, so that the magnet 110 is far away from the third magnetic working medium 213 and the fourth magnetic working medium 214 matched with the high temperature region, and thus the magnet 110 demagnetizes the third magnetic working medium 213 and the fourth magnetic working medium 214 matched with the high temperature region, during the process, the first magnetic working medium 211 and the second magnetic working medium 212 still do not participate in the excitation and demagnetization work, the temperature of the third magnetic working medium 213 and the temperature of the fourth magnetic working medium 214 are reduced, and the controller instructs the driving source 560 to drive the piston rod 540 to move towards the second end of the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the second end of the liquid storage chamber 520, and further drives the heat exchange fluid to flow from the high temperature heat exchanger 300 through the fourth magnetic working medium 214 and the third magnetic working medium 213 to the low.
When the temperature sensor 700 detects that the ambient temperature of the magnetic refrigeration system 10 is in the temperature range corresponding to the intermediate temperature range, the controller instructs the driver to drive the magnet 110 to move along the first slide rail and the second slide rail, so that the magnet 110 approaches the second magnetic medium 212 and the third magnetic medium 213 matched with the high temperature range, so as to excite the magnet 110 to the second magnetic medium 212 and the third magnetic medium 213 matched with the intermediate temperature range, the first magnetic medium 211 and the fourth magnetic medium 214 do not participate in excitation and demagnetization, the temperatures of the second magnetic medium 212 and the third magnetic medium 213 increase, at this time, the controller instructs the third control valve and the fourth control valve 644 to open, the other control valves 640 close, and simultaneously instructs the driving source 560 to drive the piston rod 540 to move towards the first end of the liquid storage chamber 643, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the first end of the liquid storage chamber 520, further driving the heat exchange fluid to flow through the second magnetic medium 212 and the third magnetic medium 213 from the low temperature heat exchanger 400 to the high temperature heat exchanger 300 and discharging heat;
then, the controller instructs the driving member to drive the magnet 110 to move along the first slide rail and the second slide rail again, so that the magnet 110 is far away from the second magnetic working medium 212 and the third magnetic working medium 213 matched with the high temperature region, and thus the magnet 110 demagnetizes the second magnetic working medium 212 and the third magnetic working medium 213 matched with the medium temperature region, in the process, the first magnetic working medium 211 and the fourth magnetic working medium 214 still do not participate in excitation and demagnetization, the temperatures of the second magnetic working medium 212 and the third magnetic working medium 213 are reduced, and the controller instructs the driving source 560 to drive the piston rod 540 to move towards the second end of the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the second end of the liquid storage chamber 520, and further drives the heat exchange fluid to flow from the high temperature heat exchanger 300 through the third magnetic working medium 213 and the second magnetic working medium 212 to the low temperature heat exchanger 400.
When the temperature sensor 700 detects that the ambient temperature of the magnetic refrigeration system 10 is in the temperature range corresponding to the low temperature region, the controller instructs the driving member to drive the magnet 110 to move along the first slide rail and the second slide rail, so that the magnet 110 approaches the first magnetic working medium 211 and the second magnetic working medium 212 matched with the high temperature region, so that the magnet 110 excites the first magnetic working medium 211 and the second magnetic working medium 212 matched with the low temperature region, the third magnetic working medium 213 and the fourth magnetic working medium 214 do not participate in excitation and demagnetization, the temperatures of the first magnetic working medium 211 and the second magnetic working medium 212 increase, at this time, the controller instructs the first control valve 641 and the second control valve 642 to open, the other control valves 640 close, and simultaneously instructs the driving source 560 to drive the piston rod 540 to move towards the first end of the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the first end of the liquid storage chamber 520, further driving the heat exchange fluid to flow from the low temperature heat exchanger 400 through the first magnetic medium 211 and the second magnetic medium 212 to the high temperature heat exchanger 300 and discharging heat;
then, the controller instructs the driving member to drive the magnet 110 to move along the first slide rail and the second slide rail again, so that the magnet 110 is far away from the first magnetic working medium 211 and the second magnetic working medium 212 matched with the low temperature region, and thus the magnet 110 demagnetizes the first magnetic working medium 211 and the second magnetic working medium 212 matched with the low temperature region, in the process, the third magnetic working medium 213 and the fourth magnetic working medium 214 still do not participate in excitation and demagnetization, the temperatures of the first magnetic working medium 211 and the second magnetic working medium 212 are reduced, and the controller instructs the driving source 560 to drive the piston rod 540 to move towards the second end of the liquid storage chamber 520, so that the piston rod 540 drives the heat exchange fluid in the liquid storage chamber 520 to flow towards the second end of the liquid storage chamber 520, and further drives the heat exchange fluid to flow from the high temperature heat exchanger 300 through the second magnetic working medium 212 and the first magnetic working medium 211 to the low temperature heat exchanger 400 and.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A magnetic refrigeration system is characterized by comprising a magnet mechanism, a magnetic heat regenerator, a high-temperature heat exchanger and a low-temperature heat exchanger; the magnetic heat regenerator comprises a plurality of magnetic working media, the Curie temperatures of the magnetic working media are different, and the magnetic working media are sequentially connected according to the sequence of the Curie temperatures of the magnetic working media; different magnetic working media can be freely combined to enable the magnetic heat regenerator to form a plurality of temperature zones with different temperature ranges, and each temperature zone is matched with at least one corresponding magnetic working medium; all the magnetic working media matched with the temperature zones respectively form a closed loop which corresponds to each temperature zone and is used for heat exchange fluid to flow with the high-temperature heat exchanger and the low-temperature heat exchanger; the magnet mechanism is positioned on one side of the magnetic heat regenerator and used for generating a magnetic field, and the magnet mechanism can move towards the direction close to or far away from all the magnetic working media matched with different temperature zones, so that all the magnetic working media matched with different temperature zones are excited and demagnetized;
when all the magnetic working media matched with the temperature zone are excited, the temperature of all the currently excited magnetic working media is increased, and the heat exchange fluid can flow through all the currently excited magnetic working media from the low-temperature heat exchanger to the high-temperature heat exchanger and emit heat; when all the magnetic working media matched with the temperature zone are demagnetized, the temperature of all the currently excited magnetic working media is reduced, and the heat exchange fluid can flow through all the currently demagnetized magnetic working media from the high-temperature heat exchanger to the low-temperature heat exchanger and emit cold.
2. The magnetic refrigeration system of claim 1, wherein the magnetic regenerator includes four of the magnetic media, the four of the magnetic media being a first magnetic media, a second magnetic media, a third magnetic media, and a fourth magnetic media, the first magnetic working medium, the second magnetic working medium, the third magnetic working medium and the fourth magnetic working medium are sequentially connected according to the Curie temperature of each magnetic working medium, the first magnetic working medium, the second magnetic working medium, the third magnetic working medium and the fourth magnetic working medium can be freely combined to enable the magnetic heat regenerator to form three temperature zones which are respectively a high temperature zone, a middle temperature zone and a low temperature zone, the high-temperature area is matched with the first magnetic working medium and the second magnetic working medium, the medium-temperature area is matched with the second magnetic working medium and the third magnetic working medium, and the low-temperature area is matched with the third magnetic working medium and the fourth magnetic working medium.
3. The magnetic refrigeration system according to claim 1, further comprising a power mechanism, wherein the power mechanism is connected between the high-temperature heat exchanger and the low-temperature heat exchanger, and the power mechanism is configured to drive the heat exchange fluid to flow in a corresponding closed loop formed by the high-temperature heat exchanger, the low-temperature heat exchanger, and all the magnetic media matching each temperature zone.
4. A magnetic refrigeration system as set forth in claim 3 wherein said power mechanism includes:
the liquid storage chamber is connected between the high-temperature heat exchanger and the low-temperature heat exchanger and is used for containing the heat exchange fluid;
the piston rod is sleeved in the liquid storage chamber; and
the drive source is connected with the piston rod and used for driving the piston rod to move in the liquid storage chamber, so that the piston rod drives the heat exchange fluid in the liquid storage chamber to flow, and further drives the heat exchange fluid to flow in the high-temperature heat exchanger, the low-temperature heat exchanger and all the corresponding closed loops formed by the magnetic working media matched with the temperature regions.
5. The magnetic refrigeration system according to claim 1, further comprising a pipeline mechanism, wherein the high-temperature heat exchanger, the low-temperature heat exchanger and all the magnetic media matching each temperature zone are connected in a closed loop manner through the pipeline mechanism, and the pipeline mechanism is used for conveying the heat exchange fluid.
6. The magnetic refrigeration system of claim 5 wherein the conduit means comprises:
the high-temperature heat exchanger, the low-temperature heat exchanger and all the magnetic working media matched with the temperature zones are connected in a closed loop mode through the circulation pipes, and the circulation pipes are used for transmitting the heat exchange fluid; and
and the control valve is arranged on the circulating pipe and can be opened or closed so as to control the circulation and the stop of the heat exchange fluid relative to the circulating pipe.
7. The magnetic refrigeration system of claim 1 wherein the magnet means comprises two sets of said magnet means, the two sets of said magnet means being spaced apart from one another, and the magnetic regenerator being disposed between the two sets of said magnet means.
8. The magnetic refrigeration system of claim 1 wherein the magnet mechanism comprises:
the first sliding rail is positioned on one side of the magnetic heat regenerator and extends along a first direction;
the second sliding rail is connected with the first sliding rail in a sliding mode and extends along a second direction perpendicular to the first direction;
the magnet is used for generating a magnetic field and is connected with the second sliding rail in a sliding manner; and
and the driving piece is in transmission connection with the magnet and is used for driving the magnet to move along the first sliding rail and the second sliding rail so as to enable the magnet to be close to or far away from all the magnetic working media matched with different temperature zones.
9. The magnetic refrigeration system of claim 1 further comprising at least one of:
a controller for controlling the operation of the various mechanisms of the magnetic refrigeration system; and
and the temperature sensor is used for detecting the ambient temperature of the magnetic refrigeration system.
10. The magnetic refrigeration system according to claim 1, wherein the number of the magnetic media matched to each temperature zone of the magnetic regenerator is the same, and the length of the magnet is equal to the total length of all the magnetic media matched to each temperature zone of the magnetic regenerator.
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| CN202010894100.9A CN112066589A (en) | 2020-08-31 | 2020-08-31 | Magnetic refrigeration system |
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| CN202010894100.9A CN112066589A (en) | 2020-08-31 | 2020-08-31 | Magnetic refrigeration system |
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