WO2024070090A1 - 固体冷凍装置 - Google Patents
固体冷凍装置 Download PDFInfo
- Publication number
- WO2024070090A1 WO2024070090A1 PCT/JP2023/023341 JP2023023341W WO2024070090A1 WO 2024070090 A1 WO2024070090 A1 WO 2024070090A1 JP 2023023341 W JP2023023341 W JP 2023023341W WO 2024070090 A1 WO2024070090 A1 WO 2024070090A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- heat medium
- solid
- magnetic
- flow path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
-
- 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
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0022—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a rotating or otherwise moving magnet
-
- 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
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0023—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with modulation, influencing or enhancing an existing magnetic field
-
- 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]
Definitions
- This disclosure relates to solid-state refrigeration devices.
- Patent Document 1 discloses a magnetic heat pump device that uses a magnetic working material that has a magnetocaloric effect.
- the magnetic working material has the greatest magnetocaloric effect (amount of heat generated, amount of heat absorbed) near its Curie temperature.
- the temperature of the magnetic working material may become the same as the ambient temperature (or the outside air temperature if the magnetic working material is outdoors), resulting in a state outside the Curie temperature.
- the temperature of the magnetic working material may become outside the Curie temperature due to sudden load fluctuations, etc. In such a state, the magnetic refrigeration device cannot perform to its specified capacity because the magnetic working material is not near its Curie temperature. For this reason, a means of adjusting the temperature of the magnetic working material is required.
- Patent Document 1 proposes using a separate heat source such as a Peltier element to control (regulate) the temperature of the magnetic working material when starting up the device, etc.
- the purpose of this disclosure is to make it possible to freely adjust the temperature of a solid refrigerant material in a solid refrigeration device such as a magnetic refrigeration device.
- a first aspect of the present disclosure is a solid refrigeration device comprising a storage section (11), a force field modulation section (15), and a heat medium transport section (21, 21A).
- the storage section (11) has a solid refrigerant material (12) and an internal flow path (13) through which the heat medium flows and exchanges heat with the solid refrigerant material (12).
- the force field modulation section (15) applies a force field fluctuation to the solid refrigerant material (12) in the storage section (11) to induce a calorific effect.
- the heat medium transport section (21, 21A) transports the heat medium back and forth to the solid refrigerant material (12) in the storage section (11) in response to the force field fluctuation.
- the solid refrigeration device performs a heat dissipation operation and a heat absorption operation.
- a predetermined force field is applied to the solid refrigerant material (12) and the heat medium is moved in a first direction in the internal flow path (13), thereby carrying the hot heat generated in the solid refrigerant material (12) to the outside of the storage section (11) by the heat medium.
- the solid refrigeration device further includes a heat exchange amount variable unit (30, 53, 54, 61, 62, 81, 82) that varies the amount of heat exchanged between the heat medium and the solid refrigerant material (12) in at least one of the heat dissipation operation and the heat absorption operation.
- the heat exchange amount variable section (30, 53, 54, 61, 62, 81, 82) varies the amount of heat exchanged between the heat medium and the solid refrigerant material (12) in the heat dissipation or heat absorption operation. This allows the balance between the amount of warm heat stored in the heat dissipation operation and the amount of cold heat stored in the heat absorption operation to be changed, thereby controlling the solid refrigerant material (12) to a predetermined temperature.
- the second aspect of the present disclosure is the first aspect, in which the heat exchange amount variable section (30, 53, 54, 61, 62, 81, 82) varies the flow rate per unit time of the heat medium in at least one of the heat dissipation operation and the heat absorption operation.
- the amount of heat exchanged between the heat medium and the solid refrigerant material (12) can be varied by changing the flow rate per unit time of the heat medium in the heat dissipation or heat absorption operation.
- a third aspect of the present disclosure is the first or second aspect, in which the heat exchange amount variable section (30, 53, 54, 61, 62, 81, 82) varies the transport time of the heat medium in at least one of the heat dissipation operation and the heat absorption operation.
- the amount of heat exchange between the heat medium and the solid refrigerant material (12) can be varied by changing the transport time of the heat medium during the heat dissipation or heat absorption operation.
- a fourth aspect of the present disclosure is any one of the first to third aspects, in which the heat exchange amount variable section (30, 53, 54, 61, 62, 81, 82) varies the timing of transporting the heat medium in at least one of the heat dissipation operation and the heat absorption operation.
- the amount of heat exchange between the heat medium and the solid refrigerant material (12) can be varied by changing the timing of transport of the heat medium during the heat dissipation or heat absorption operation.
- a fifth aspect of the present disclosure is any one of the first to fourth aspects, in which the solid refrigerant material (12) is a magnetic working material (12), and the force field modulation unit (15) is a magnetic field modulation unit (15) that imparts a magnetic field fluctuation to the magnetic working material (12).
- the magnetic working material (12) can be controlled to a predetermined temperature in the magnetic refrigeration device.
- FIG. 1 is a piping diagram of a magnetic refrigeration apparatus according to an embodiment.
- FIG. 2 is a diagram showing a schematic relationship between the temperature and magnetocaloric effect of a plurality of solid refrigerant materials arranged in a cascade shape in a single container in the magnetic refrigeration device according to the embodiment.
- FIG. 3 is a diagram showing a schematic relationship between the temperature and magnetocaloric effect of a plurality of solid refrigerant materials arranged in a cascade shape in a plurality of partial accommodation portions in the magnetic refrigeration device according to the embodiment.
- FIG. 4 is a piping diagram for explaining the heat radiation operation and heat absorption operation performed by the magnetic refrigeration device according to the embodiment.
- FIG. 1 is a piping diagram of a magnetic refrigeration apparatus according to an embodiment.
- FIG. 2 is a diagram showing a schematic relationship between the temperature and magnetocaloric effect of a plurality of solid refrigerant materials arranged in a cascade shape in a single container in the magnetic refrigeration device according to the
- FIG. 5 is a diagram showing a mechanism for lowering the temperature of the magnetic working material by the heat exchange amount variable portion in the magnetic refrigeration device according to the embodiment.
- FIG. 6 is a diagram showing a mechanism for increasing the temperature of the magnetic working material by the heat exchange amount variable unit in the magnetic refrigeration device according to the embodiment.
- FIG. 7 is a diagram showing the time variations of the magnetic field and the heat medium flow rate during normal operation of the magnetic refrigeration device according to the embodiment.
- FIG. 8 is a diagram showing the time variations of the magnetic field and the heat medium flow rate when the flow rate per unit time of the heat medium is changed in the magnetic refrigeration device according to the embodiment.
- FIG. 9 is a diagram showing the time variations of the magnetic field and the heat medium flow rate when the heat medium transport time is changed in the magnetic refrigeration device according to the embodiment.
- FIG. 10 is a diagram showing changes over time in the magnetic field and the heat medium flow rate during normal operation of the rotating magnet type magnetic refrigeration device according to the first modification.
- FIG. 11 is a diagram showing the time variations in the magnetic field and the heat medium flow rate when the transfer timing of the heat medium is changed in the rotating magnet type magnetic refrigeration device according to the first modification.
- FIG. 12 is a piping diagram of the magnetic refrigeration device according to the second modification during heat dissipation operation.
- FIG. 13 is a piping diagram of the magnetic refrigeration device according to the second modification during heat absorption operation.
- FIG. 14 is a piping diagram of the magnetic refrigeration device according to the third modification during heat dissipation operation.
- FIG. 15 is a piping diagram of the magnetic refrigeration device according to the third modification during heat absorption operation.
- FIG. 16 is a piping diagram of a magnetic refrigeration apparatus according to the fourth modification.
- the magnetic refrigeration device (1) of the present embodiment is a solid-state refrigeration device that adjusts the temperature of a heat medium by utilizing the magnetocaloric effect, and is applied to, for example, an air conditioner.
- the magnetic refrigeration device (1) adjusts the temperature of air in a space to be air-conditioned.
- the space to be air-conditioned is, for example, an indoor space.
- the magnetic refrigeration device (1) switches between a cooling operation and a heating operation.
- the magnetic refrigeration device (1) includes a heat medium circuit (C) filled with a heat medium.
- the heat medium circuit (C) transports the filled heat medium.
- the heat medium includes, for example, a refrigerant, water, brine, etc.
- the magnetic refrigeration device (1) mainly comprises a storage section (11), a magnetic field modulation section (15) which is a force field modulation section, a first heat exchanger (16), a second heat exchanger (17), a reciprocating pump (21) which is a heat medium transport section, and a control section (30).
- the storage section (11), the first heat exchanger (16), the second heat exchanger (17), and the reciprocating pump (21) are connected to each other via heat medium piping to form a heat medium circuit (C).
- the storage section (11) has a magnetic working material (12) which is a solid refrigerant material, and an internal flow path (13) through which the heat transfer medium flows and exchanges heat with the solid refrigerant material (12).
- the storage section (11) is a hollow case or column. The inside of the storage section (11) is filled with the magnetic working material (12).
- the magnetic working material (12) generates heat when a magnetic field is applied or when the applied magnetic field becomes stronger.
- the magnetic working material (12) absorbs heat when the magnetic field is removed or when the applied magnetic field becomes weaker.
- Examples of the material of the magnetic working material ( 12) that can be used include Gd5(Ge0.5Si0.5 ) 4 , La (Fe1 - xSix ) 13 , La( Fe1- xCoxSiy ) 13 , La(Fe1 - xSix ) 13Hy , and Mn( As0.9Sb0.1 ).
- the magnetic working material (12) may be composed of a plurality of materials having different Curie temperatures at which the calorific effect is maximized.
- the plurality of materials are arranged along the internal flow path (13) in order of high to low Curie temperature (i.e., in a cascade).
- the various magnetic working materials (12) have different Curie temperatures, i.e., the relationship between temperature and magnetocaloric effect.
- the Curie temperature of the first material (12a) is Ta
- the Curie temperature of the second material (12b) is Tb
- the Curie temperature of the third material (12c) is Tc
- the Curie temperature of the fourth material (12d) is Td
- the Curie temperature of the fifth material (12e) is Te
- the storage section (11) may be configured with a plurality of partial storage sections (11a to 11e) connected in series to each other in the heat medium circuit (C), and each of the plurality of partial storage sections (11a to 11e) may store a corresponding substance among the plurality of substances (12a to 12e).
- the magnetic field modulation section (15) induces a calorific effect by applying a magnetic field fluctuation to the magnetic working material (12) in the container section (11).
- the magnetic field modulation section (15) is composed of, for example, an electromagnet capable of modulating a magnetic field.
- the magnetic field modulation section (15) performs a first modulation operation and a second modulation operation. In the first modulation operation, a predetermined magnetic field is applied to the magnetic working material (12). In the second modulation operation, a magnetic field smaller than the predetermined magnetic field is applied or the predetermined magnetic field is removed.
- the first heat exchanger (16) may be an indoor heat exchanger that exchanges heat between the heat medium heated by the magnetic working material (12) and indoor air. Alternatively, the first heat exchanger (16) may exchange heat between the heat medium heated by the magnetic working material (12) and a secondary refrigerant flowing through a utilization unit (e.g., an air handling unit) not shown.
- the second heat exchanger (17) may be an outdoor heat exchanger that exchanges heat between the heat medium cooled by the magnetic working material (12) and outdoor air. Alternatively, the second heat exchanger (17) may exchange heat between the heat medium cooled by the magnetic working material (12) and a secondary refrigerant flowing through a heat source unit (e.g., a cooling tower) not shown.
- the first heat exchanger (16) and the second heat exchanger (17) are connected via the internal flow path (13) of the accommodation section (11).
- the reciprocating pump (21) reciprocates the heat medium to the magnetic working material (12) in the storage section (11) in response to magnetic field fluctuations.
- the reciprocating pump (21) is, for example, a piston pump.
- the reciprocating pump (21) has a pump case (22), a piston (23), and a drive mechanism (not shown).
- the piston (23) is disposed inside the pump case (22).
- the piston (23) divides the inside of the pump case (22) into two chambers.
- one chamber (hereinafter referred to as the first chamber) of the pump case (22) is connected to the first heat exchanger (16), and the other chamber (hereinafter referred to as the second chamber) of the pump case (22) is connected to the second heat exchanger (17).
- the drive mechanism has a rod connected to the piston (23), a crank connected to the rod, and an electric motor that drives the crank. When the electric motor rotates the crank, the rod moves back and forth, causing the piston (23) to reciprocate within the pump case (22).
- the first conveying operation and the second conveying operation are alternately and repeatedly performed.
- the piston (23) moves in a direction that expands the first chamber and reduces the second chamber.
- the heat medium is discharged from the second chamber, and in the heat medium circuit (C), the heat medium moves sequentially toward the second heat exchanger (17), the accommodation section (11) (internal flow path (13)), and the first heat exchanger (16), and is sucked into the first chamber.
- the piston (23) moves in a direction that contracts the first chamber and expands the second chamber.
- the heat medium is discharged from the first chamber, and in the heat medium circuit (C), the heat medium moves sequentially toward the first heat exchanger (16), the accommodation section (11) (internal flow path (13)), and the second heat exchanger (17), and is sucked into the second chamber.
- the control unit (30) controls, for example, the operation of each of the magnetic field modulation unit (15) and the reciprocating pump (21).
- the control unit (30) is configured, for example, using a microcomputer and a memory device (specifically, a semiconductor memory) that stores software for operating the microcomputer.
- the control unit (30) is connected to each of the magnetic field modulation unit (15) and the reciprocating pump (21) via a communication line.
- the magnetic refrigeration device (1) performs a heat dissipation operation (hot blow) and a heat absorption operation (cold blow).
- a predetermined magnetic field is applied to the magnetic working material (12) and the heat medium is moved in a first direction in the internal flow path (13), so that the hot heat generated in the magnetic working material (12) is transported by the heat medium to the outside of the storage section (11), for example, to the first heat exchanger (16), and dissipated.
- a magnetic field smaller than the predetermined magnetic field is applied to the magnetic working material (12) or the predetermined magnetic field is removed and the heat medium is moved in a second direction opposite to the first direction in the internal flow path (13), so that the cold heat generated in the magnetic working material (12) is transported by the heat medium to the outside of the storage section (11), for example, to the second heat exchanger (17), and absorbed.
- the heat dissipation operation involves a first modulation operation (excitation) of the magnetic field modulation section (15) and a first conveying operation of the reciprocating pump (21).
- the heat medium is heated in the internal flow path (13) of the storage section (11).
- the heated heat medium dissipates heat in the first heat exchanger (16).
- the second modulation operation (demagnetization) of the magnetic field modulation section (15) and the second conveying operation of the reciprocating pump (21) are performed.
- the heat medium is cooled in the internal flow path (13) of the storage section (11).
- the cooled heat medium absorbs heat in the second heat exchanger (17).
- the magnetic refrigeration device (1) When the magnetic refrigeration device (1) performs a cycle (AMR (Active Magnetic Refrigerator) cycle) in which the heat dissipation and heat absorption operations described above are repeated, the magnetic working material (12) in the container (11) regenerates while generating heat and cold due to magnetic field fluctuations, creating a temperature gradient in the container (11) and resulting in a large temperature difference between the high-temperature end and low-temperature end of the container (11).
- AMR Active Magnetic Refrigerator
- the heat medium heated by the magnetic working material (12) releases heat to the indoor air in the first heat exchanger (16), heating the indoor air, while the heat medium cooled by the magnetic working material (12) absorbs heat from the outdoor air in the second heat exchanger (17). This enables heating operation.
- the internal flow path (13) is arranged along the longitudinal direction of the storage section (11), in other words, the high-temperature side inlet/outlet port and the low-temperature side inlet/outlet port of the internal flow path (13) are arranged at both longitudinal ends of the storage section (11), respectively.
- the arrangement of the internal flow path (13) is not limited to this.
- the high-temperature side inlet/outlet port and the low-temperature side inlet/outlet port of the internal flow path (13) may be arranged on the same face of the storage section (11).
- the direction in which the heat medium flows from the low-temperature side inlet/outlet port to the high-temperature side inlet/outlet port in the internal flow path (13) is the “first direction”
- the direction in which the heat medium flows from the high-temperature side inlet/outlet port to the low-temperature side inlet/outlet port is the “second direction”.
- the control unit (30) controls the reciprocating pump (21) to vary the amount of heat exchanged between the heat medium and the magnetic working material (12) in at least one of the heat dissipation and heat absorption operations. That is, in this embodiment, the control unit (30) and the reciprocating pump (21) form a heat exchange amount varying unit.
- the control unit (30) may be provided separately from the reciprocating pump (21), or a part of the control unit (30) that performs the heat exchange amount varying function may be provided integrally with the reciprocating pump (21).
- the heat exchange amount variable portion enables the temperature control of the magnetic working material (12).
- the hot heat generated by the magnetic working material (12) due to the magnetocaloric effect is supplied from the high temperature end of the storage portion (11) to the outside (first heat exchanger (16)) by the heat medium flowing from the low temperature end to the high temperature end of the storage portion (11).
- the heat medium flowing from the low temperature end to the high temperature end of the storage portion (11) At this time, not all of the hot heat generated by the magnetic working material (12) is transported to the high temperature end of the storage portion (11), and a part of the hot heat is stored in the magnetic working material (12) itself.
- the temperature of the magnetic working material (12) is determined by the balance between the amount of heat stored in the heat dissipation operation and the amount of cold heat stored in the heat absorption operation.
- the temperature of the magnetic working material (12) is determined by the balance between the amount of heat transferred to the high temperature end in the heat dissipation operation and the amount of cold heat transferred to the low temperature end in the heat absorption operation. Therefore, by changing the balance between the amount of heat stored in the heat dissipation operation and the amount of cold heat stored in the heat absorption operation using the heat exchange amount variable unit, it is possible to raise or lower the temperature of the magnetic working material (12).
- the heat exchange amount variable section may vary the flow rate of the heat medium per unit time in at least one of the heat dissipation operation and the heat absorption operation, thereby varying the amount of heat exchanged between the heat medium and the solid refrigerant material (12).
- Fig. 7 shows the time change of the magnetic field and the heat medium flow rate during normal operation of the magnetic refrigeration device (1).
- the heat medium movement amount is set to be the same in the heat radiation operation and the heat absorption operation. Specifically, if the heat medium flow rate per unit time in the heat radiation operation and the heat medium transport time are respectively fH and tH , and the heat medium flow rate per unit time in the heat absorption operation and the heat medium transport time are respectively fC and tC , then fC ⁇ fH and tC ⁇ tH , and the heat medium movement amount fH x tH in the heat radiation operation is approximately equal to the heat medium movement amount fC x tC in the heat absorption operation.
- FIG. 8 shows the time change of the magnetic field and the flow rate of the heat medium when the flow rate per unit time of the heat medium is changed in the magnetic refrigeration device (1).
- the flow rate fH of the heat medium per unit time in the heat dissipation operation is set to be smaller than that in the normal operation
- the flow rate fC of the heat medium per unit time in the heat absorption operation is set to be larger than that in the normal operation. That is, fH ⁇ fC is set.
- the transport time of the heat medium is tC ⁇ tH, which is the same as that in the normal operation, and the magnetic field change is also the same as that in the normal operation.
- the movement amount fC ⁇ tC of the heat medium in the heat absorption operation is larger than the movement amount fH ⁇ tH of the heat medium in the heat dissipation operation, so that the "amount of hot heat stored in the magnetic working material (12) in the heat dissipation operation" is larger than the "amount of cold heat stored in the magnetic working material (12) in the heat absorption operation", and the temperature of the magnetic working material (12) rises. Therefore, when the temperature of the magnetic working material (12) is lower than the Curie temperature when the magnetic refrigeration device (1) is started up, the flow rate of the heat medium is controlled as shown in Fig.
- the heat exchange amount variable unit i.e., the control unit (30) and the reciprocating pump (21), so that the temperature of the magnetic working material (12) can be brought closer to the Curie temperature.
- the control unit (30) and the reciprocating pump (21) allows the magnetic refrigeration device (1) to be started up quickly.
- the temperature of the magnetic working material (12) can be brought closer to the Curie temperature quickly, so that the magnetic refrigeration device (1) can perform its designated capacity.
- the transport time of the heat medium may be changed as shown in Fig. 9.
- the transport time tH of the heat medium in the heat dissipation operation is set to be the same as that in normal operation
- the transport time tC of the heat medium in the heat absorption operation is set to be shorter than that in normal operation. That is, tH > tC is set.
- the flow rate of the heat medium per unit time is fC ⁇ fH , which is the same as that in normal operation, and the magnetic field change is also the same as that in normal operation.
- the movement amount fH ⁇ tH of the heat medium in the heat dissipation operation is larger than the movement amount fC ⁇ tC of the heat medium in the heat absorption operation, so that the "amount of hot heat stored in the magnetic working material (12) in the heat dissipation operation" is smaller than the "amount of cold heat stored in the magnetic working material (12) in the heat absorption operation", and the temperature of the magnetic working material (12) drops. Therefore, when the temperature of the magnetic working material (12) is higher than the Curie temperature when the magnetic refrigeration device (1) is started up, the flow rate of the heat medium is controlled as shown in Fig.
- the heat exchange amount variable unit i.e., the control unit (30) and the reciprocating pump (21), so that the temperature of the magnetic working material (12) can be brought closer to the Curie temperature.
- the control unit (30) and the reciprocating pump (21) controls the temperature of the magnetic working material (12) to be brought closer to the Curie temperature.
- the temperature of the magnetic working material (12) can be brought closer to the Curie temperature quickly, so that the magnetic refrigeration device (1) can perform its designated capacity.
- the magnetic refrigeration device (1) includes a storage section (11), a magnetic field modulation section (15), and a heat medium transport section (21).
- the storage section (11) includes a magnetic working material (12) and an internal flow path (13) through which the heat medium flows and exchanges heat with the magnetic working material (12).
- the magnetic field modulation section (15) applies a magnetic field fluctuation to the magnetic working material (12) in the storage section (11) to induce a calorific effect.
- the heat medium transport section (21) transports the heat medium back and forth to the magnetic working material (12) in the storage section (11) in response to the magnetic field fluctuation.
- the magnetic refrigeration device (1) performs a heat dissipation operation and a heat absorption operation.
- a predetermined magnetic field is applied to the magnetic working material (12) and the heat medium is moved in a first direction of the internal flow path (13), so that the heat generated in the magnetic working material (12) is transported to the outside of the storage section (11) by the heat medium.
- a magnetic field smaller than a predetermined magnetic field is applied to the magnetic working material (12) or the predetermined magnetic field is removed, and the heat medium is moved in a second direction opposite to the first direction in the internal flow path (13), thereby transporting the cold generated in the magnetic working material (12) to the outside of the storage section (11) by the heat medium.
- control section (30) and the reciprocating pump (21) constitute a heat exchange amount variable section that varies the amount of heat exchanged between the heat medium and the magnetic working material (12) in at least one of the heat dissipation operation and the heat absorption operation.
- the heat exchange amount variable section varies the amount of heat exchanged between the heat medium and the magnetic working material (12) in the heat dissipation or heat absorption operation, so that it is possible to change the balance between the amount of warm heat stored in the magnetic working material (12) in the heat dissipation operation and the amount of cold heat stored in the magnetic working material (12) in the heat absorption operation.
- This makes it possible to realize control that brings the temperature of the magnetic working material (12) close to a specified temperature (Curie temperature) while avoiding increased costs and reduced efficiency due to the addition of equipment and parts, and therefore allows the magnetic refrigeration device (1) to be started up quickly and to perform at a specified capacity.
- the heat exchange amount variable section may vary the flow rate per unit time of the heat medium and/or the transport time of the heat medium in at least one of the heat dissipation operation and the heat absorption operation, thereby varying the amount of heat exchange between the heat medium and the magnetic working material (12).
- a magnetic working material (12) is filled inside a storage section (11) formed of a hollow case or column, and a magnetic field modulation section (15) formed of an electromagnet capable of modulating a magnetic field is used to impart a magnetic field fluctuation to the magnetic working material (12) inside the storage section (11), thereby changing the magnetic field into a pulsed form as shown in Figures 7 to 9.
- the magnetic refrigeration device (1) of this modified example is a magnetic heat pump device in which the magnetic circuit rotates.
- the storage section (11) is, for example, an annular storage section in which a plurality of heat exchange blocks arranged in an annular shape are stored. Each heat exchange block may be, for example, an annular sector shape.
- a magnetic field application mechanism is arranged to sandwich the heat exchange block in the axial direction of the annular storage section.
- the magnetic field application mechanism has at least one magnetic field application section arranged in close proximity to the heat exchange block, and a yoke for supporting the magnetic field application section and forming a magnetic path.
- the magnetic field application section is composed of a pair of magnets that sandwich the heat exchange block in the axial direction of the annular storage section.
- the magnetic field application section overlaps a predetermined number of heat exchange blocks.
- the number of magnetic field application sections is equal to the number of poles of the magnetic circuit.
- a rotation mechanism is arranged to extend in the axial direction of the annular storage section through the central opening of the annular storage section.
- the magnetic field application mechanism rotates in the circumferential direction of the annular storage section by the rotation mechanism.
- the annular storage section i.e., the heat exchange block, may be fixed.
- the magnetic field application section and the heat exchange block are evenly arranged in the circumferential direction of the same axis.
- the excited heat exchange block changes from moment to moment as the magnetic field application mechanism rotates; in other words, a magnetic field fluctuation is applied to the magnetic working material in the heat exchange block, forming a magnet rotation type magnetic refrigeration device.
- the magnetic field modulation unit (15) is composed of a magnetic field application mechanism and a rotation mechanism.
- Fig. 10 shows the time variation of the magnetic field and the heat medium flow rate during normal operation of the magnetic refrigeration device (1) of this modified example. As shown in Fig. 10, during normal operation, the heat medium movement amount is set to be the same in the heat radiation operation and the heat absorption operation.
- the heat medium flow rate per unit time in the heat radiation operation and the heat medium transport time are respectively fH and tH
- the heat medium flow rate per unit time in the heat absorption operation and the heat medium transport time are respectively fC and tC
- the heat medium movement amount fH x tH in the heat radiation operation is approximately equal to the heat medium movement amount fC x tC in the heat absorption operation.
- the magnetic field application unit rotates at a predetermined rotational speed, so that, as shown in FIG. 10, a state exists in which an intermediate magnetic field between the excited state and the demagnetized state is applied to the magnetic working material (12) of each heat exchange block. If a heat medium is passed through the magnetic working material (12) at the timing when this intermediate magnetic field is applied to exchange heat with the magnetic working material (12), the magnetocaloric effect is not fully generated, and the amount of heat exchanged is smaller than in the excited or demagnetized states.
- the heat exchange amount variable section i.e., the control section (30) and the reciprocating pump (21), varies the timing of transporting the heat medium during at least one of the heat dissipation and heat absorption operations, thereby varying the amount of heat exchanged between the heat medium and the solid refrigerant material (12).
- Fig. 11 shows the time changes of the magnetic field and the heat medium flow rate when the timing of transport of the heat medium is changed in the magnetic refrigeration device (1) of this modified example.
- the flow rate per unit time of the heat medium and the transport time of the heat medium are fH ⁇ fC and tC ⁇ tH , which are the same as those in normal operation, but the transport timing of the heat medium in the heat absorption operation is intentionally set to a timing at which the amount of heat exchange is small, thereby adjusting the amount of heat stored in the magnetic working material (12), i.e., the temperature.
- the magnetic field changes are the same as those in normal operation.
- the amount of heat exchanged during the heat dissipation operation is greater than the amount of heat exchanged during the heat absorption operation, and therefore the "amount of hot heat stored in the magnetic working material (12) during the heat dissipation operation" is smaller than the "amount of cold heat stored in the magnetic working material (12) during the heat absorption operation," and the temperature of the magnetic working material (12) drops. Therefore, if the temperature of the magnetic working material (12) is higher than the Curie temperature when the magnetic refrigeration device (1) is started up, the temperature of the magnetic working material (12) can be brought closer to the Curie temperature by controlling the flow rate of the heat medium as shown in FIG. 11 using the heat exchange amount variable unit, i.e., the control unit (30) and the reciprocating pump (21). This allows the magnetic refrigeration device (1) to be started up and to quickly demonstrate a specified capacity.
- the heat exchange amount variable unit i.e., the control unit (30) and the reciprocating pump (21).
- Figures 12 and 13 are piping diagrams of the magnetic refrigeration system (1) of this modified example during heat dissipation and heat absorption, respectively.
- Figures 12 and 13 the same components as those in the magnetic refrigeration system (1) of the embodiment shown in Figure 1 are denoted by the same reference numerals.
- the main points in which this modified example differs from the embodiment are as follows.
- a first internal flow path (13A) and a second internal flow path (13B) are formed inside the storage section (11).
- the heat medium flows in the first internal flow path (13A) from the low temperature end to the high temperature end.
- Check valves (CV1) and (CV3) are provided upstream of the low temperature side inlet port and downstream of the high temperature side outlet port of the first internal flow path (13A), respectively.
- the heat medium flows in the second internal flow path (13B) from the high temperature end to the low temperature end.
- Check valves (CV2) and (CV4) are provided upstream of the high temperature side inlet port and downstream of the low temperature side outlet port of the second internal flow path (13B), respectively.
- the low temperature side inlet port and the high temperature side outlet port of the first internal flow path (13A) are connected to the outlet portion of the second heat exchanger (17) and the inlet portion of the first heat exchanger (16), respectively.
- the high-temperature side inlet port and the low-temperature side outlet port of the second internal flow path (13B) are connected to the outlet of the first heat exchanger (16) and the inlet of the second heat exchanger (17), respectively.
- a one-way pump (21A) and a four-way switching valve (41) are provided as a heat medium transport unit.
- the four-way switching valve (41) has a first port, a second port, a third port, and a fourth port.
- the first port of the four-way switching valve (41) is represented by a symbol with a circle around 1
- the second port of the four-way switching valve (41) is represented by a symbol with a circle around 2
- the third port of the four-way switching valve (41) is represented by a symbol with a circle around 3
- the fourth port of the four-way switching valve (41) is represented by a symbol with a circle around 4.
- the first port of the four-way switching valve (41) is connected to the outlet of the pump (21A).
- the second port of the four-way switching valve (41) is connected to the low-temperature side inlet port of the first internal flow path (13A) and the outlet of the second heat exchanger (17) via the branch (B1) of the heat medium circuit (C).
- the third port of the four-way switching valve (41) is connected to the high-temperature side inlet port of the second internal flow path (13B) and the outlet of the first heat exchanger (16) via the branch (B2) of the heat medium circuit (C).
- the fourth port of the four-way switching valve (41) is connected to the inlet of the pump (21A).
- the operation of the pump (21A) and the four-way switching valve (41) is controlled by the control unit (30).
- the pump (21A) and the four-way switching valve (41) are connected to the control unit (30) via a communication line.
- a bypass circuit (50) is provided that connects a portion between the second port of the four-way switching valve (41) and the branch (B1) in the heat medium circuit (C) and a portion between the third port of the four-way switching valve (41) and the branch (B2) in the heat medium circuit (C).
- the bypass circuit (50) has a first flow path (51) and a second flow path (52).
- the heat medium flows through the first flow path (51) from a branch (B3) located between the second port of the four-way switching valve (41) in the heat medium circuit (C) and the branch (B1) to a branch (B4) located between the third port of the four-way switching valve (41) in the heat medium circuit (C) and the branch (B2).
- a check valve (CV5) and a first control valve (53) are provided in the first flow path (51).
- the first control valve (53) may be a flow rate adjustment valve whose opening degree can be finely adjusted.
- the operation of the first control valve (53) is controlled by the control unit (30).
- the first control valve (53) is connected to the control unit (30) via a communication line.
- the heat medium flows through the second flow path (52) from a branch (B5) located between the third port of the four-way switching valve (41) in the heat medium circuit (C) and the branch (B2) to a branch (B6) located between the second port of the four-way switching valve (41) in the heat medium circuit (C) and the branch (B1).
- a check valve (CV6) and a second control valve (54) are provided in the second flow path (52).
- the second control valve (54) may be a flow rate adjustment valve whose opening can be finely adjusted.
- the operation of the second control valve (54) is controlled by the control unit (30).
- the second control valve (54) is connected to the control unit (30) via a communication line.
- a predetermined magnetic field is applied to the magnetic working material (12) while the first port is connected to the second port and the third port is connected to the fourth port of the four-way switching valve (41).
- the heat medium discharged from the pump (21A) passes through the four-way switching valve (41) and flows into the first internal flow path (13A) of the storage section (11), where the heat medium is heated.
- the heated heat medium dissipates heat in the first heat exchanger (16), and then returns to the pump (21A) via the four-way switching valve (41).
- the first port is connected to the third port, and the second port is connected to the fourth port, and a magnetic field smaller than a predetermined magnetic field is applied to the magnetic working material (12) or the predetermined magnetic field is removed.
- the heat medium discharged from the pump (21A) flows into the second internal flow path (13B) of the storage section (11) via the four-way switching valve (41), and is cooled in the second internal flow path (13B).
- the cooled heat medium absorbs heat in the second heat exchanger (17), and then returns to the pump (21A) via the four-way switching valve (41).
- the pressure loss in the first flow path (51) of the bypass circuit (50) can be controlled by adjusting the opening of the first control valve (53), so that the flow rate per unit time of the heat medium flowing into the first internal flow path (13A) of the storage section (11) can be made variable.
- the pressure loss in the second flow path (52) of the bypass circuit (50) can be controlled by adjusting the opening of the second control valve (54), so that the flow rate per unit time of the heat medium flowing into the second internal flow path (13B) of the storage section (11) can be varied.
- the control unit (30) controls the first control valve (53) and the second control valve (54) to vary the amount of heat exchanged between the heat medium and the magnetic working material (12) in at least one of the heat dissipation operation and the heat absorption operation. That is, in this modified example, the control unit (30), the first control valve (53), and the second control valve (54) form a heat exchange amount variable unit.
- the control unit (30) may be provided separately from the first control valve (53) and the second control valve (54), or the part of the control unit (30) that performs the heat exchange amount varying function may be provided integrally with the first control valve (53) and the second control valve (54).
- the opening of the bypass circuit (50) (the first flow path (51) and the second flow path (52)) by the heat exchange amount variable part of this modified example to a short period of time that does not cause mixing of the high-temperature heat medium and the low-temperature heat medium.
- Figures 14 and 15 are piping diagrams of the magnetic refrigeration system (1) of this modified example during heat dissipation and heat absorption, respectively.
- Figures 14 and 15 the same components as those in the magnetic refrigeration system (1) of modified example 2 shown in Figures 12 and 13 are denoted by the same reference numerals.
- the main points in which this modified example differs from modified example 2 are as follows.
- shutoff valves (61, 62) are provided instead of the bypass circuit (50) of the magnetic refrigeration device (1) of the modification 2. Specifically, a first shutoff valve (61) is provided between the second port of the four-way switching valve (41) and the branch (B1) in the heat medium circuit (C), and a second shutoff valve (62) is provided between the third port of the four-way switching valve (41) and the branch (B2) in the heat medium circuit (C).
- the first shutoff valve (61) and the second shutoff valve (62) are configured to be able to open and close at any timing.
- the operation of the first shutoff valve (61) and the second shutoff valve (62) is controlled by the control unit (30).
- the first shutoff valve (61) and the second shutoff valve (62) are connected to the control unit (30) via a communication line.
- a predetermined magnetic field is applied to the magnetic working material (12) in a state where the first port is connected to the second port and the third port is connected to the fourth port of the four-way switching valve (41).
- the heat medium discharged from the pump (21A) flows into the first internal flow path (13A) of the storage section (11) via the four-way switching valve (41) and the first cutoff valve (61), and the heat medium is heated in the first internal flow path (13A).
- a part of the heated heat medium dissipates heat in the first heat exchanger (16), and then returns to the pump (21A) via the second cutoff valve (62) and the four-way switching valve (41).
- the first port is connected to the third port, and the second port is connected to the fourth port, and a magnetic field smaller than a predetermined magnetic field is applied to the magnetic working material (12) or the predetermined magnetic field is removed.
- the heat medium discharged from the pump (21A) flows through the four-way switching valve (41) and the second cutoff valve (62) into the second internal flow path (13B) of the storage section (11), where the heat medium is cooled.
- the cooled heat medium absorbs heat in the second heat exchanger (17), and then returns to the pump (21A) through the first cutoff valve (61) and the four-way switching valve (41).
- the control unit (30) controls the first cutoff valve (61) and the second cutoff valve (62) to vary the transport time and/or transport timing of the heat medium in at least one of the heat dissipation and heat absorption operations.
- This makes it possible to vary the amount of heat exchanged between the heat medium and the magnetic working material (12) in at least one of the heat dissipation and heat absorption operations.
- the control unit (30) and the first cutoff valve (61) and the second cutoff valve (62) form a heat exchange amount variable unit.
- the first cutoff valve (61) and the second cutoff valve (62) can be used to shorten the transport time of the heat medium or intentionally shift the transport timing of the heat medium relative to magnetic field fluctuations, thereby reducing the amount of heat exchange.
- the control unit (30) may be provided separately from the first shutoff valve (61) and the second shutoff valve (62), or the part of the control unit (30) that performs the heat exchange amount varying function may be provided integrally with the first shutoff valve (61) and the second shutoff valve (62).
- the same effect can be obtained even if only one of the first shutoff valve (61) and the second shutoff valve (62) is provided.
- the same effect can be obtained even if a four-way switching valve (41) having a shutoff valve function is provided instead of the first shutoff valve (61) and the second shutoff valve (62).
- FIG. 16 is a piping diagram of a magnetic refrigeration system (1) of this modified example.
- the same components as those in the magnetic refrigeration system (1) of the embodiment shown in Fig. 1 are denoted by the same reference numerals.
- the main points in which this modified example differs from the embodiment are as follows.
- the magnetic refrigeration device (1) of this modified example includes two magnetic refrigeration units (10), specifically, a first magnetic refrigeration unit (10A) and a second magnetic refrigeration unit (10B), each of which is composed of a storage section (11) and a magnetic field modulation section (15).
- a first internal flow path (13A) and a second internal flow path (13B) are formed inside the storage section (11).
- a check valve (CVA) is provided upstream of the low temperature side inlet port of the first internal flow path (13A).
- a check valve (CVB) is provided downstream of the low temperature side outlet port of the second internal flow path (13B).
- the low-temperature side inlet port of the first internal flow path (13A) of each magnetic refrigeration unit (10) is connected to the outlet of the second heat exchanger (17).
- the high-temperature side outlet port of the first internal flow path (13A) of each magnetic refrigeration unit (10) is connected to the inlet of the first heat exchanger (16) via the first three-way valve (71) and the pump (21A).
- the high-temperature side inlet port of the second internal flow path (13B) of each magnetic refrigeration unit (10) is connected to the inlet of the first heat exchanger (16) via the second three-way valve (72).
- the low-temperature side outlet port of the second internal flow path (13B) of each magnetic refrigeration unit (10) is connected to the inlet of the second heat exchanger (17).
- a one-way pump (21A), a first three-way valve (71), and a second three-way valve (72) are provided as a heat medium transport unit.
- a first control valve (81) is provided between the high-temperature side inlet port of the second internal flow path (13B) of the first magnetic refrigeration unit (10A) and the second three-way valve (72), and a second control valve (82) is provided between the high-temperature side inlet port of the second internal flow path (13B) of the second magnetic refrigeration unit (10B) and the second three-way valve (72).
- the first control valve (81) and the second control valve (82) may be flow rate adjustment valves whose opening degree can be finely adjusted.
- the operation of the first control valve (81) and the second control valve (82) is controlled by the control unit (30).
- the first control valve (81) and the second control valve (82) are connected to the control unit (30) via a communication line.
- the second magnetic refrigeration unit (10B) when the first magnetic refrigeration unit (10A) performs a heat dissipation operation, the second magnetic refrigeration unit (10B) performs a heat absorption operation, and when the first magnetic refrigeration unit (10A) performs a heat absorption operation, the second magnetic refrigeration unit (10B) performs a heat dissipation operation.
- the operation of the first magnetic refrigeration unit (10A) and the operation of the second magnetic refrigeration unit (10B) are in an anti-phase relationship.
- the heat medium heated in the first internal flow path (13A) by applying a predetermined magnetic field to the magnetic working material (12) flows into the first heat exchanger (16) via the first three-way valve (71) and the pump (21A) to dissipate heat, and then passes through the second three-way valve (72), the first control valve (81), the second internal flow path (13B), and the second heat exchanger (17), and re-flows into the first internal flow path (13A).
- the heat medium cooled in the second internal flow path (13B) by applying a magnetic field smaller than a predetermined magnetic field to the magnetic working material (12) or by removing the predetermined magnetic field flows into the second heat exchanger (17) to absorb heat, and then passes through the first internal flow path (13A), the first three-way valve (71), the pump (21A), the first heat exchanger (16), the second three-way valve (72), and the second control valve (82), and re-flows into the second internal flow path (13B).
- the heat medium cooled in the second internal flow path (13B) by applying a magnetic field smaller than a predetermined magnetic field to the magnetic working material (12) or by removing the predetermined magnetic field flows into the second heat exchanger (17) to absorb heat, and then passes through the first internal flow path (13A), the first three-way valve (71), the pump (21A), the first heat exchanger (16), the second three-way valve (72), and the first control valve (81), and re-flows into the second internal flow path (13B).
- the heat medium heated in the first internal flow path (13A) by applying a predetermined magnetic field to the magnetic working material (12) flows into the first heat exchanger (16) via the first three-way valve (71) and the pump (21A) to dissipate heat, and then passes through the second three-way valve (72), the second control valve (82), the second internal flow path (13B), and the second heat exchanger (17) to re-flow into the first internal flow path (13A).
- the control unit (30) controls the first control valve (81) and the second control valve (82) to vary the flow rate per unit time of the heat medium in at least one of the heat radiation and heat absorption operations of each magnetic refrigeration unit (10).
- This makes it possible to vary the amount of heat exchanged between the heat medium and the magnetic working material (12) in at least one of the heat radiation and heat absorption operations of each magnetic refrigeration unit (10). That is, in this modified example, the control unit (30), the first control valve (81), and the second control valve (82) form a heat exchange amount variable unit.
- the control section (30) may be provided separately from the first control valve (81) and the second control valve (82), or the part of the control section (30) that performs the function of varying the amount of heat exchange may be provided integrally with the first control valve (81) and the second control valve (82).
- the operation of the first magnetic refrigeration unit (10A) and the operation of the second magnetic refrigeration unit (10B) are in an opposite phase relationship. For this reason, for example, when the flow rate of the heat medium in the heat dissipation operation of the first magnetic refrigeration unit (10A) is reduced, the flow rate of the heat medium in the heat absorption operation of the second magnetic refrigeration unit (10B) is also reduced, and as a result, the material temperature of the first magnetic refrigeration unit (10A) increases, but the material temperature of the second magnetic refrigeration unit (10B) decreases. Therefore, the material temperatures of both magnetic refrigeration units (10) cannot be increased or decreased at the same time.
- a magnetic refrigeration device which is a solid refrigeration device
- the solid refrigeration device may use a method other than magnetic refrigeration that induces a magnetocaloric effect in the magnetic working material 12.
- the solid refrigerant material also includes a material having properties intermediate between a liquid and a solid, such as a soft crystal.
- solid refrigeration devices include, for example, 1) a type that induces an electrocaloric effect in a solid refrigerant material, 2) a type that induces a pressure caloric effect in a solid refrigerant material, and 3) a type that induces an elastic caloric effect in a solid refrigerant material.
- the force field application unit (hereinafter also referred to as the inducing unit) applies an electric field fluctuation to the solid refrigerant material. This causes the solid refrigerant material to undergo a phase transition from ferroelectric to paraelectric, causing the solid refrigerant material to generate or absorb heat.
- the inducing part applies pressure fluctuations to the solid refrigerant material, causing the solid refrigerant material to undergo a phase transition and generate or absorb heat.
- the inducing part applies stress fluctuations to the solid refrigerant material, causing the solid refrigerant material to undergo a phase transition and generate or absorb heat.
- the present disclosure is useful for solid-state refrigeration devices, particularly magnetic refrigeration devices.
- Magnetic refrigeration device solid-state refrigeration device
- storage section magnetic working material (solid refrigerant material)
- Internal flow path 15
- Magnetic field modulation section force field modulation section
- Reciprocating pump (heat medium transport section)
- 21A Pump (heat medium transport section)
- Control unit heat exchange amount variable unit
- Control valve variable heat exchanger
- 81, 82 Control valve (variable heat exchanger)
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
実施形態について説明する。本実施形態の磁気冷凍装置(1)は、磁気熱量効果を利用して熱媒体の温度を調節する固体冷凍装置であって、例えば空気調和装置に適用される。この場合、磁気冷凍装置(1)は、空調対象の空間の空気の温度を調節する。空調対象の空間は、例えば室内空間である。磁気冷凍装置(1)は、冷房運転と暖房運転とを切り換えて行う。
図1に示すように、磁気冷凍装置(1)は、熱媒体が充填される熱媒体回路(C)を備える。熱媒体回路(C)では、充填された熱媒体が搬送される。熱媒体は、例えば冷媒、水、ブラインなどを含む。
磁気冷凍装置(1)は、放熱動作(ホットブロー)と、吸熱動作(コールドブロー)とを行う。放熱動作では、磁気作業物質(12)に所定の磁場を印加すると共に熱媒体を内部流路(13)の第1方向に移動させることにより、磁気作業物質(12)で発生した温熱を熱媒体によって収容部(11)の外部、例えば第1熱交換器(16)へ運び放熱させる。吸熱動作では、磁気作業物質(12)に所定の磁場よりも小さい磁場を印加し又は所定の磁場を除去すると共に熱媒体を内部流路(13)における第1方向とは反対方向の第2方向に移動させることにより、磁気作業物質(12)で発生した冷熱を熱媒体によって収容部(11)の外部、例えば第2熱交換器(17)へ運び吸熱させる。
本実施形態の磁気冷凍装置(1)においては、制御部(30)が往復式ポンプ(21)を制御することにより、放熱動作及び吸熱動作の少なくとも一方における熱媒体と磁気作業物質(12)との間の熱交換量を可変とする。すなわち、本実施形態では、制御部(30)と往復式ポンプ(21)とによって熱交換量可変部が構成される。尚、制御部(30)は、往復式ポンプ(21)と別体に設けてもよいし、或いは、制御部(30)の機能のうち熱交換量可変機能を担う部分を往復式ポンプ(21)と一体に設けてもよい。
以上に説明したように、本実施形態において、磁気冷凍装置(1)は、収容部(11)と、磁場変調部(15)と、熱媒体搬送部(21)とを備える。収容部(11)は、磁気作業物質(12)と、熱媒体が磁気作業物質(12)と熱交換して流れる内部流路(13)とを有する。磁場変調部(15)は、収容部(11)内の磁気作業物質(12)に磁場変動を付与して熱量効果を誘発させる。熱媒体搬送部(21)は、磁場変動に応じて熱媒体を収容部(11)内の磁気作業物質(12)に対して往復的に搬送する。磁気冷凍装置(1)は、放熱動作と、吸熱動作とを行う。放熱動作では、磁気作業物質(12)に所定の磁場を印加すると共に熱媒体を内部流路(13)の第1方向に移動させることにより、磁気作業物質(12)で発生した温熱を熱媒体によって収容部(11)の外部へ運ぶ。吸熱動作では、磁気作業物質(12)に所定の磁場よりも小さい磁場を印加し又は所定の磁場を除去すると共に熱媒体を内部流路(13)における第1方向とは反対方向の第2方向に移動させることにより、磁気作業物質(12)で発生した冷熱を熱媒体によって収容部(11)の外部へ運ぶ。磁気冷凍装置(1)において、制御部(30)と往復式ポンプ(21)とは、放熱動作及び吸熱動作の少なくとも一方における熱媒体と磁気作業物質(12)との間の熱交換量を可変とする熱交換量可変部を構成する。
前記実施形態の磁気冷凍装置(1)では、中空状のケースないしカラムで構成された収容部(11)の内部に磁気作業物質(12)を充填し、磁場を変調可能な電磁石で構成された磁場変調部(15)を用いて、収容部(11)内の磁気作業物質(12)に磁場変動を付与し、図7~図9に示すように、磁場をパルス状に変化させた。
図12及び図13はそれぞれ、本変形例の磁気冷凍装置(1)の放熱動作時及び吸熱動作時の配管系統図である。図12及び図13において、図1に示す前記実施形態の磁気冷凍装置(1)と同じ構成要素には同じ符号を付している。本変形例が前記実施形態と異なっている主な点は以下の通りである。
図14及び図15はそれぞれ、本変形例の磁気冷凍装置(1)の放熱動作時及び吸熱動作時の配管系統図である。図14及び図15において、図12、図13に示す前記変形例2の磁気冷凍装置(1)と同じ構成要素には同じ符号を付している。本変形例が前記変形例2と異なっている主な点は以下の通りである。
図16は、本変形例の磁気冷凍装置(1)の配管系統図である。図16において、図1に示す前記実施形態の磁気冷凍装置(1)と同じ構成要素には同じ符号を付している。本変形例が前記実施形態と異なっている主な点は以下の通りである。
以上の実施形態及び変形例では、固体冷凍装置である磁気冷凍装置について例示してきたが、固体冷凍装置は、磁気作業物質(12)に磁気熱量効果を誘発する磁気冷凍以外の他の方式を用いたものであってもよい。尚、本開示において、固体冷媒物質には、柔軟結晶などの液体と固体の中間の性質を有するものも含む。
11 収容部
12 磁気作業物質(固体冷媒物質)
13 内部流路
15 磁場変調部(力場変調部)
21 往復式ポンプ(熱媒体搬送部)
21A ポンプ(熱媒体搬送部)
30 制御部(熱交換量可変部)
53,54 制御弁(熱交換量可変部)
61,62 締切弁(熱交換量可変部)
81,82 制御弁(熱交換量可変部)
Claims (5)
- 固体冷媒物質(12)、及び熱媒体が前記固体冷媒物質(12)と熱交換して流れる内部流路(13)を有する収容部(11)と、
前記収容部(11)内の前記固体冷媒物質(12)に力場変動を付与して熱量効果を誘発させる力場変調部(15)と、
前記力場変動に応じて前記熱媒体を前記収容部(11)内の前記固体冷媒物質(12)に対して往復的に搬送する熱媒体搬送部(21,21A)とを備え、
前記固体冷媒物質(12)に所定の力場を印加すると共に前記熱媒体を前記内部流路(13)の第1方向に移動させることにより、前記固体冷媒物質(12)で発生した温熱を前記熱媒体によって前記収容部(11)の外部へ運ぶ放熱動作と、前記固体冷媒物質(12)に前記所定の力場よりも小さい力場を印加し又は前記所定の力場を除去すると共に前記熱媒体を前記内部流路(13)における前記第1方向とは反対方向の第2方向に移動させることにより、前記固体冷媒物質(12)で発生した冷熱を前記熱媒体によって前記収容部(11)の外部へ運ぶ吸熱動作とを行う固体冷凍装置であって、
前記放熱動作及び前記吸熱動作の少なくとも一方における前記熱媒体と前記固体冷媒物質(12)との間の熱交換量を可変とする熱交換量可変部(30,53,54,61,62,81,82)をさらに備える、
固体冷凍装置。 - 請求項1の固体冷凍装置において、
前記熱交換量可変部(30,53,54,61,62,81,82)は、前記放熱動作及び前記吸熱動作の少なくとも一方における前記熱媒体の単位時間当たりの流量を可変とする、
固体冷凍装置。 - 請求項1の固体冷凍装置において、
前記熱交換量可変部(30,53,54,61,62,81,82)は、前記放熱動作及び前記吸熱動作の少なくとも一方における前記熱媒体の搬送時間を可変とする、
固体冷凍装置。 - 請求項1の固体冷凍装置において、
前記熱交換量可変部(30,53,54,61,62,81,82)は、前記放熱動作及び前記吸熱動作の少なくとも一方における前記熱媒体の搬送タイミングを可変とする、
固体冷凍装置。 - 請求項1~4のいずれか1項の固体冷凍装置において、
前記固体冷媒物質(12)は、磁気作業物質(12)であり、
前記力場変調部(15)は、前記磁気作業物質(12)に磁場変動を付与する磁場変調部(15)である、
固体冷凍装置。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380058575.6A CN119678002A (zh) | 2022-09-26 | 2023-06-23 | 固态制冷装置 |
| EP23871335.8A EP4549840A4 (en) | 2022-09-26 | 2023-06-23 | SOLID STATE REFRIGERATION DEVICE |
| US19/067,557 US20250198667A1 (en) | 2022-09-26 | 2025-02-28 | Solid-state refrigeration device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022152286 | 2022-09-26 | ||
| JP2022-152286 | 2022-09-26 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/067,557 Continuation US20250198667A1 (en) | 2022-09-26 | 2025-02-28 | Solid-state refrigeration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024070090A1 true WO2024070090A1 (ja) | 2024-04-04 |
Family
ID=90476915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/023341 Ceased WO2024070090A1 (ja) | 2022-09-26 | 2023-06-23 | 固体冷凍装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250198667A1 (ja) |
| EP (1) | EP4549840A4 (ja) |
| JP (1) | JP7564477B2 (ja) |
| CN (1) | CN119678002A (ja) |
| WO (1) | WO2024070090A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20260084309A (ko) * | 2024-11-29 | 2026-06-05 | 삼성전자주식회사 | 능동 자기 재생기 및 그 제어 방법 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077032A (ja) * | 2003-09-02 | 2005-03-24 | Denso Corp | 熱交換装置 |
| JP2016011799A (ja) | 2014-06-30 | 2016-01-21 | 株式会社フジクラ | 磁気ヒートポンプ装置及び空気調和装置 |
| WO2021065792A1 (ja) * | 2019-09-30 | 2021-04-08 | ダイキン工業株式会社 | 固体冷却モジュール |
| JP2022012535A (ja) * | 2020-07-01 | 2022-01-17 | 株式会社デンソー | 固体冷媒システム |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012056560A1 (ja) * | 2010-10-29 | 2012-05-03 | 株式会社 東芝 | 磁気冷凍システム |
-
2023
- 2023-06-23 JP JP2023102967A patent/JP7564477B2/ja active Active
- 2023-06-23 WO PCT/JP2023/023341 patent/WO2024070090A1/ja not_active Ceased
- 2023-06-23 CN CN202380058575.6A patent/CN119678002A/zh active Pending
- 2023-06-23 EP EP23871335.8A patent/EP4549840A4/en active Pending
-
2025
- 2025-02-28 US US19/067,557 patent/US20250198667A1/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077032A (ja) * | 2003-09-02 | 2005-03-24 | Denso Corp | 熱交換装置 |
| JP2016011799A (ja) | 2014-06-30 | 2016-01-21 | 株式会社フジクラ | 磁気ヒートポンプ装置及び空気調和装置 |
| WO2021065792A1 (ja) * | 2019-09-30 | 2021-04-08 | ダイキン工業株式会社 | 固体冷却モジュール |
| JP2022012535A (ja) * | 2020-07-01 | 2022-01-17 | 株式会社デンソー | 固体冷媒システム |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4549840A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024047536A (ja) | 2024-04-05 |
| EP4549840A4 (en) | 2025-09-03 |
| CN119678002A (zh) | 2025-03-21 |
| US20250198667A1 (en) | 2025-06-19 |
| JP7564477B2 (ja) | 2024-10-09 |
| EP4549840A1 (en) | 2025-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101639544B1 (ko) | 자기 냉각 시스템들의 단방향 흐름 모드들의 사용 | |
| JP7364932B2 (ja) | 固体冷凍装置 | |
| US9927155B2 (en) | Magnetic refrigeration system with unequal blows | |
| KR102217279B1 (ko) | 자기열 물질을 사용하는 가변 히트 펌프 | |
| JP5267689B2 (ja) | 磁気ヒートポンプ装置 | |
| EP2813785B1 (en) | Magnetic cooling apparatus and method of controlling the same | |
| JP7477805B2 (ja) | 固体冷凍装置 | |
| JP7436875B2 (ja) | 固体冷凍装置 | |
| JP2015075292A (ja) | 磁気熱量素子およびそれを備える熱磁気サイクル装置 | |
| CN110953760B (zh) | 磁制冷系统 | |
| JP7564477B2 (ja) | 固体冷凍装置 | |
| JP2016080206A (ja) | 磁気熱量素子および熱磁気サイクル装置 | |
| CN119213266B (zh) | 磁制冷装置 | |
| JP7688248B2 (ja) | 固体冷凍装置 | |
| JP7777057B2 (ja) | 固体冷凍装置 | |
| JP2023141836A (ja) | 固体冷媒による冷凍装置 | |
| JP2023142130A (ja) | 磁気冷凍装置 | |
| JPH09257326A (ja) | ヴィルミエヒートポンプ及びその運転方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23871335 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023871335 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380058575.6 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 2023871335 Country of ref document: EP Effective date: 20250131 |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380058575.6 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 2023871335 Country of ref document: EP |