IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0118377
(2008-05-09)
|
등록번호 |
US-7603865
(2009-11-10)
|
우선권정보 |
KR-10-2005-0107305(2005-11-10); KR-10-2005-0107306(2005-11-10); KR-10-2005-0107308(2005-11-10); KR-10-2005-0126983(2005-12-21) |
발명자
/ 주소 |
- Shin, Seung Hoon
- Lee, Dong Kwan
|
출원인 / 주소 |
- Daewoo Electronics Corporation
|
대리인 / 주소 |
Edell, Shapiro & Finnan, LLC
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
11 |
초록
A magnetic refrigerator includes independent hot heat exchange unit and cold heat exchange unit wherein separate heat transfer fluids are circulated.
대표청구항
▼
What is claimed is: 1. A magnetic refrigerator, comprising: a plurality of magnetic heat exchange units configured to exchange heat with a flow of a heat transfer fluid, each unit including a case including an upper case and lower case and a magnetocaloric material sealed in the case to prevent dir
What is claimed is: 1. A magnetic refrigerator, comprising: a plurality of magnetic heat exchange units configured to exchange heat with a flow of a heat transfer fluid, each unit including a case including an upper case and lower case and a magnetocaloric material sealed in the case to prevent direct contact between the magnetocaloric material and the heat transfer fluid, a temperature of the magnetocaloric material changing when a magnetic field is applied; a rotating plate comprising a plurality of mounting holes disposed along a circumference of the rotating plate, the plurality of magnetic heat exchange units being mounted in the mounting holes and having a predetermined distance therebetween; a magnet disposed along portions of an upper surface and a bottom surface of the rotating plate, the magnet applying a magnetic field to increase the temperature of the magnetic heat exchange units in the magnetic field; a hot heat exchange member disposed at a hot side of the plurality of magnetic heat exchange units; and a cold heat exchange member disposed at a cold side of the plurality of magnetic heat exchange units, wherein the heat transfer fluid is divided into a first heat transfer fluid circulating in the hot heat exchange member and a second heat transfer fluid circulating in the cold heat exchange member. 2. The refrigerator in accordance with claim 1, wherein the hot heat exchange member comprises a hot heat exchanger, a first pipe for moving the first heat transfer fluid at a cold side outlet of the hot heat exchanger to the hot side of the plurality of magnetic heat exchange units, and a second pipe for moving the first heat transfer fluid to a hot side inlet of the hot heat exchanger, wherein the first heat transfer fluid absorbs a heat of the magnetocaloric material, and the cold heat exchange member comprises a cold heat exchanger, a third pipe for moving the second heat transfer fluid at a hot side outlet of the cold heat exchanger to the cold side of the plurality of magnetic heat exchange units, and a fourth pipe for moving the second heat transfer fluid to a cold side inlet of the cold heat exchanger, wherein the second heat transfer fluid emits a heat to the magnetocaloric material. 3. The refrigerator in accordance with claim 1, wherein the magnetocaloric material comprises gadolinium. 4. The refrigerator in accordance with claim 1, wherein the case comprises a groove at a sidewall thereof. 5. The refrigerator in accordance with claim 4, wherein the groove is slanted from an upper portion of the uppercase toward a lower portion of the lower case. 6. The refrigerator in accordance with claim 1, wherein the case comprises aluminum. 7. The refrigerator in accordance with claim 6, wherein the upper case and the lower case are sealed by a copper brazing. 8. The refrigerator in accordance with claim 7, wherein the case further comprises a through-hole for passing the heat transfer fluid therethrough. 9. The refrigerator in accordance with claim 1, wherein the magnetocaloric material comprises gadolinium. 10. A magnetic refrigerator, comprising: a plurality of magnetic heat exchange units, each magnetic heat exchange unit comprising a case and a plurality of magnetocaloric material pieces for exchanging heat with a flow of a heat transfer fluid, wherein the magnetocaloric material pieces are spaced apart in the case such that each of the plurality of magnetocaloric material pieces and the case have a predetermined distance therebetween; a rotating plate, the plurality of magnetic heat exchange units being disposed along a circumference of the rotating plate and spaced apart at a predetermined distance, each of the magnetic heat exchange units being mounted in a manner that its case passes through the rotating plate in a vertical direction and a portion of its case extends from a lower surface the rotating plate; a magnet disposed below a bottom surface of the rotating plate and on opposite sides of the extending portion of the case of one of the magnetic heat exchange units, the magnet applying a magnetic field to increase a temperature of the magnetic heat exchange units when the plurality of magnetic heat exchange units pass; a hot heat exchange member disposed at a hot side of the plurality of magnetic heat exchange units; and a cold heat exchange member disposed at a cold side of the plurality of magnetic heat exchange units, wherein the heat transfer fluid is divided into a first heat transfer fluid circulating in the hot heat exchange member and a second heat transfer fluid circulating in the cold heat exchange member. 11. The refrigerator in accordance with claim 10, wherein an upper portion of the case has a shape of a funnel, and a supporting piece for supporting each of the plurality of magnetocaloric material pieces is disposed at a lower portion of the case. 12. The refrigerator in accordance with claim 11, wherein the plurality of magnetocaloric material pieces are disposed in a manner that the plurality of magnetocaloric material pieces are not in contact with one another. 13. The refrigerator in accordance with claim 11, wherein each of the plurality of magnetocaloric material pieces has a shape of a rod having a constant circular cross-section in a lengthwise direction. 14. The refrigerator in accordance with claim 10, wherein the magnetocaloric material comprises gadolinium. 15. A magnetic refrigerator comprising: a first rotating plate in which is mounted a plurality of first magnetic heat exchange units configured to exchange heat with a flow of a first heat transfer fluid, disposed along a circumference thereof, each of the plurality of first magnetic heat exchange units including a case including an upper case and lower case and a first magnetocaloric material sealed in the case to prevent direct contact between the first magnetocaloric material and the first heat transfer fluid, a temperature of the first magnetocaloric material changing when a magnetic field is applied; a first magnet disposed along portions of an upper surface and a bottom surface of the first rotating plate, the first magnet applying a magnetic field to increase a temperature of the first magnetocaloric material of the first magnetic heat exchange units in the magnetic field; a hot heat exchange member disposed at a hot side of the plurality of first magnetic heat exchange units and configured to circulate the first heat transfer fluid; a second rotating plate in which is mounted a plurality of second magnetic heat exchange units configured to exchange heat with a flow of a second heat transfer fluid, disposed along a circumference thereof, each of the plurality of second magnetic heat exchange units including a second magnetocaloric material, a temperature of the second magnetocaloric material changing when a magnetic field is applied; a second magnet configured to apply a magnetic field to increase a temperature of the second magnetocaloric material of the second magnetic heat exchange units in the magnetic field; a cold heat exchange member disposed at a cold side of the plurality of first second magnetic heat exchange units and configured to circulate the second heat transfer fluid; and an intermediate circulation member for guiding an intermediate heat transfer fluid circulating between the cold side of the plurality of first magnetic heat exchange units and a hot side of the plurality of second magnetic heat exchange units. 16. The refrigerator in accordance with claim 10, wherein the hot heat exchange member comprises a hot heat exchanger, a first pipe for moving the first heat transfer fluid at a cold side outlet of the hot heat exchanger to the hot side of the plurality of magnetic heat exchange units, and a second pipe for moving the first heat transfer fluid to a hot side inlet of the hot heat exchanger, wherein the first heat transfer fluid absorbs a heat of the magnetocaloric material, and the cold heat exchange member comprises a cold heat exchanger, a third pipe for moving the second heat transfer fluid at a hot side outlet of the cold heat exchanger to the cold side of the plurality of magnetic heat exchange units, and a fourth pipe for moving the second heat transfer fluid to a cold side inlet of the cold heat exchanger, wherein the second heat transfer fluid emits heat to the magnetocaloric material. 17. The refrigerator in accordance with claim 15, wherein the hot heat exchange member comprises a hot heat exchanger, a first pipe for moving the first heat transfer fluid at a cold side outlet of the hot heat exchanger to the hot side of the plurality of first magnetic heat exchange units, and a second pipe for moving the first heat transfer fluid to a hot side inlet of the hot heat exchanger, wherein the first heat transfer fluid absorbs a heat of the first magnetocaloric material, and the cold heat exchange member comprises a cold heat exchanger, a third pipe for moving the second heat transfer fluid at a hot side outlet of the cold heat exchanger to the cold side of the plurality of second magnetic heat exchange units, and a fourth pipe for moving the second heat transfer fluid to a cold side inlet of the cold heat exchanger, wherein the second heat transfer fluid emits heat to the second magnetocaloric material.
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