Magnetic material for magnetic refrigeration apparatus, amr bed, and magnetic refrigeration apparatus

a technology of magnetic refrigeration and amr bed, which is applied in the direction of lighting and heating apparatus, machine operation mode, magnetic body, etc., can solve the problems of reducing working efficiency, affecting the environment, and cfc's substitutes also have adverse effects on the environment, so as to improve the efficiency of magnetic refrigeration and widen the effect of operation
US20090217674A1Inactive Publication Date: 2009-09-03KK TOSHIBA
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KK TOSHIBA
Publication Date
2009-09-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

There are provided a magnetic material for a magnetic refrigeration apparatus, which improves magnetic refrigeration efficiency by the wide operation temperature range of it, AMR bed using the magnetic material, and a magnetic refrigeration apparatus. The magnetic material is used for the magnetic refrigeration apparatus using a liquid refrigerant, formed by approximately uniformly blending at least two kinds of magnetic particles having different magnetic transition temperatures, and the magnetic particles exhibit an approximately spherical shape with maximum diameter of 0.3 mm or more to 2 mm or less. The AMR bed is filled with the magnetic particles.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is based upon and claims the benefit of priority from Japanese Patent Applications No. 2008-047663, filed on Feb. 28, 2008, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention relates to a magnetic material having a magnetocaloric effect and used for a magnetic refrigeration apparatus, AMR bed using the magnetic material, and the magnetic refrigeration apparatus.BACKGROUND OF THE INVENTION

[0003] At present, a refrigeration technology in a room temperature region which closely relates to a human daily life, for example, a refrigerator, a freezer, a room air conditioner, and the like, almost employs a gas compression / expansion cycle. However, as to the gas compression / expansion cycle, a serious problem of environmental destruction is caused by specific freon gases discharged into the environment, and CFC's substitutes also have a problem of an adverse affect to t...

Claims

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