[특허]Magneto-caloric effect type heat pump apparatus

DENSO CORPORATION

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Magneto-caloric effect type heat pump apparatus

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-021/00 B60H-001/00 B60H-001/32
출원번호	US-0450622 (2012-04-19)
등록번호	US-9534814 (2017-01-03)
우선권정보	JP-2011-097114 (2011-04-25)
발명자 / 주소	Morimoto, Tsuyoshi Watanabe, Naoki Yatsuzuka, Shinichi Nishizawa, Kazutoshi
출원인 / 주소	DENSO CORPORATION
대리인 / 주소	Harness, Dickey & Pierce, P.L.C.
인용정보	피인용 횟수 : 0 인용 특허 : 7

초록
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A magneto-caloric effect type heat pump apparatus includes a magneto-caloric element which generates heat when an external magnetic field is applied to and which absorbs heat when the external magnetic field is removed from; a magnetic field switcher which switches the applying and the removal of the external magnetic field from each other; a pump pumping a heat transport medium between a low-temperature end and a high-temperature end of the magneto-caloric element; and an auxiliary heat source device which supplies heat of a heating element to the magne...

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1. A magneto-caloric effect type heat pump apparatus comprising: a first magneto-caloric element which generates heat when a first external magnetic field is applied and which absorbs heat when the first external magnetic field is removed;a first magnetic field switcher which switches the first external magnetic field between the applying and the removal;a second magneto-caloric element which generates heat when a second external magnetic field is applied and which absorbs heat when the second external magnetic field is removed;a second magnetic field switcher which switches the second external magnetic field between the applying and the removal;a pump pumping heat transport medium from a middle high-temperature end of the first magneto-caloric element toward a high-temperature end of the first magneto-caloric element when the first external magnetic field is applied to the first magneto-caloric element, and pumping the heat transport medium from the high-temperature end toward the middle high-temperature end when the first external magnetic field is removed from the first magneto-caloric element;the pump pumping the heat transport medium from a low-temperature end of the second magneto-caloric element toward a middle low-temperature end of the second magneto-caloric element when the second external magnetic field is applied to the second magneto-caloric element, and pumping the heat transport medium from the middle low-temperature end toward the low-temperature end when the second external magnetic field is removed from the second magneto-caloric element,an auxiliary heat source device which supplies heat of a heating element to the first magneto-caloric element; whereincold energy which is transported from the high-temperature end toward the middle high-temperature end of the first magneto-caloric element is further transmitted to the middle low-temperature end of the second magneto-caloric element;the heat of the auxiliary heat source device is transported to the high-temperature end of the first magneto-caloric element;the auxiliary heat source device includes a heat exchanger that transmits the heat of the heating element to the heat transport medium;the heat exchanger is disposed outside of a housing that houses the first magneto-caloric element;the heat exchanger has a ring shape entirely surrounding a circumference of the housing; andthe heat exchanger has an inlet and an exit for the heat transport medium at positions opposing to each other through the housing that houses the first magneto-caloric element. 2. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the auxiliary heat source device supplies the heat of the heating element to the first magneto-caloric element through the heat transport medium. 3. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the auxiliary heat source device supplies the heat of the heating element to the first magneto-caloric element from an intermediate position located between the middle high-temperature end and the high temperature end. 4. The magneto-caloric effect type heat pump apparatus according to claim 3, wherein the auxiliary heat source device supplies the heat of the heating element to the first magneto-caloric element from a position adjacent to the high temperature end rather than a middle position between the low temperature end and the high temperature end. 5. The magneto-caloric effect type heat pump apparatus according to claim 2, wherein the auxiliary heat source device supplies the heat of the heating element to the middle high-temperature end of the first magneto-caloric element. 6. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein a main heat source is outside air outside of a vehicle, and a thermal load is inside air inside of the vehicle;heat of the outside air is supplied to the inside air; andthe heating element is an inverter device that supplies electricity to a driving motor for driving the vehicle. 7. The magneto-caloric effect type heat pump apparatus according to claim 1, further comprising: an outdoor heat exchanger that exchanges heat with a main heat source;a low-temperature circulation passage passing through the outdoor heat exchanger;an indoor heat exchanger that exchanges heat with a thermal load; anda high-temperature circulation passage passing through the indoor heat exchanger, whereinthe pump discharges the heat transport medium to the high-temperature circulation passage from the high-temperature end when the heat transport medium flows from the middle high-temperature end to the high-temperature end,the pump draws the heat transport medium from the high-temperature circulation passage to the high-temperature end when the heat transport medium flows from the high-temperature end to the middle high-temperature end,the pump discharges the heat transport medium to the low-temperature circulation passage from the low-temperature end when the heat transport medium flows from the middle low-temperature end to the low-temperature end, andthe pump draws the heat transport medium from the low-temperature circulation passage to the low-temperature end when the heat transport medium flows from the low-temperature end to the middle low-temperature end. 8. The magneto-caloric effect type heat pump apparatus according to claim 7, wherein the first magneto-caloric element is arranged in a first unit, the first magneto-caloric element having the high-temperature end and the middle high-temperature end opposite from the high-temperature end, and the second magneto-caloric element is arranged in a second unit, the second magneto-caloric element having the low-temperature end and the middle low-temperature end opposite from the low-temperature end,the first magnetic field switcher includes a first permanent magnet arranged in the first unit, the first permanent magnet switching the first external magnetic field between the applying and the removal for the first magneto-caloric element by rotating, andthe second magnetic field switcher includes a second permanent magnet arranged in the second unit, the second permanent magnet switching the second external magnetic field between the applying and the removal for the second magneto-caloric element by rotating,the pump discharges the heat transport medium to the high-temperature circulation passage from the high-temperature end when the heat transport medium flows from the middle high-temperature end to the high-temperature end in the first unit,the pump draws the heat transport medium from the high-temperature circulation passage to the high-temperature end when the heat transport medium flows from the high-temperature end to the middle high-temperature end in the first unit,the pump discharges the heat transport medium to the low-temperature circulation passage from the low-temperature end when the heat transport medium flows from the middle low-temperature end to the low-temperature end in the second unit, andthe pump draws the heat transport medium from the low-temperature circulation passage to the low-temperature end when the heat transport medium flows from the low-temperature end to the middle low-temperature end in the second unit. 9. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the auxiliary heat source device supplies the heat of the heating element to only one of a plurality of element units that has the effective temperature range corresponding to a temperature of the heat of the heating element. 10. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein a first plurality of element units arranged in series between the high-temperature end and the middle high-temperature end have a step-shaped distribution of the efficient temperature zones corresponding to a temperature distribution defined between the high-temperature end and the middle high-temperature end; anda second plurality of element units arranged in series between the middle low-temperature end and the low-temperature end have a step-shaped distribution of the efficient temperature zones corresponding to a temperature distribution defined between the middle low-temperature end and the low-temperature end. 11. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein a first plurality of element units arranged in series between the high-temperature end and the middle high-temperature end have a first element unit having a highest efficient temperature zone located at the high-temperature end and a second element unit having a lowest efficient temperature zone located at the middle high-temperature end; anda second plurality of element units arranged in series between the middle low-temperature end and the low-temperature end have a first element unit having a highest efficient temperature zone located at the middle low-temperature end and a second element unit having a lowest efficient temperature zone located at the low-temperature end. 12. The magneto-caloric effect type heat pump apparatus according to claim 11, wherein the first plurality of element units arranged in series between the first element unit and the second element unit each have a decreasing efficient temperature zone from the first element unit to the second element unit, the decreasing efficient temperature zones forming a step-shaped distribution between the first and second element units of the first plurality of element units; andthe second plurality of element units arranged in series between the first element unit and the second element unit each have a decreasing efficient temperature zone from the first element unit to the second element unit, the decreasing efficient temperature zones forming a step-shaped distribution between the first and second element units of the second plurality of element units. 13. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the magneto-caloric element has a plurality of element units that respectively have efficient temperature ranges different from each other, the plurality of element units having high magneto-caloric effect in the efficient temperature ranges,the plurality of element units are arranged in series between the high temperature end and the low temperature end in a manner that the efficient temperature ranges are aligned, andthe auxiliary heat source device supplies the heat of the heating element to one of the plurality of element units that has the efficient temperature range corresponding to a temperature of the heat of the heating element. 14. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the middle high-temperature end of the first magneto-caloric element is thermally bonded to the middle low-temperature of the second magneto-caloric element. 15. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the heat transport medium includes a first heat transport medium associated with the first magneto-caloric element and a second heat transport medium associated with the second magneto-caloric element, the second heat transport medium being separate from the first heat transport medium. 16. The magneto-caloric effect type heat pump apparatus according to claim 15, wherein the pump includes a driver, the driver pumping both the first heat transport medium and the second heat transport medium. 17. The magneto-caloric effect type heat pump apparatus according to claim 16, wherein the driver is a single cam plate. 18. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the pump includes a driver, the driver pumping the heat transport medium from the middle high-temperature end toward the high-temperature end and pumping the heat transport medium from the middle-low temperature end toward the low temperature end. 19. The magneto-caloric effect type heat pump apparatus according to claim 18, wherein the driver is a single cam plate. 20. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the pump starts with the starting of the magneto-caloric effect type heat pump apparatus or in advance of the starting of the magneto-caloric effect type heat pump apparatus. 21. The magneto-caloric effect type heat pump apparatus according to claim 1, further comprising: an auxiliary heat amount controller that controls the amount of heat supplied to the first magneto-caloric element from the auxiliary heat source device. 22. The magneto-caloric effect type heat pump apparatus according to claim 21, wherein the auxiliary heat amount controller controls the auxiliary heat source device to increase a heat amount of the auxiliary heat source device when the magneto-caloric effect type heat pump apparatus is started. 23. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the heat exchanger is in direct contact with the housing. 24. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein a third heat transport medium disposed within the heat exchanger is separate from the first and second heat transfer mediums such that the third heat transport medium never mixes with either of the first and second heat transfer mediums. 25. The magneto-caloric effect type heat pump apparatus according to claim 24, wherein the third heat transport medium is in direct contact with an outside surface of the housing. 26. The magneto-caloric effect type heat pump apparatus according to claim 24, wherein the third heat transport medium flows in a circumferential direction around an outer surface of the housing. 27. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the first magneto-caloric element is disposed within a first housing, the second magneto-caloric element is disposed within a second housing and the pump is disposed within a third housing, the first housing being spaced from the second housing, the third housing being disposed between the first and second housings, the first, second and third housings having a common central axis. 28. The magneto-caloric effect type heat pump apparatus according to claim 26, wherein the first magnetic field switcher, the second magnetic field switcher and the pump rotate around a common central axis. 29. The magneto-caloric effect type heat pump apparatus according to claim 1, wherein the first magneto-caloric element is one of a plurality of first magneto-caloric elements arranged in a circumference direction of the housing.

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Magneto-caloric effect type heat pump apparatus

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Magneto-caloric effect type heat pump apparatus

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