Rotary magnetic refrigerator
AssigneeHitachi, Ltd.
InventorsYoshinori Hakuraku, Hisanao Ogata
Life of this patent
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Abstract
A rotary magnetic refrigerator comprising two rotors which are packed with portions of a working substance at equal spacing along the outer circumference thereof, and which are made of a material having a low thermal conductivity, openings that are formed in the outer surfaces of said rotors so as to communicate with a high-temperature cooling medium, housings having cooling portions provided on sides thereof opposite to said openings, means which establishes an intense magnetic field near said openings and which establishes a weak magnetic field near said cooling portions, and means for driving said rotors.
Claims2
In a rotary magnetic refrigerator comprising rotors which are packed with portions of a working substance at equal spacing along the outer circumference thereof, and which are made of a material having a low thermal conductivity, openings that are formed in the outer surfaces of said rotors so as to communicate with a high-temperature cooling medium, housings having cooling portions provided on sides thereof opposite to said openings, means which establishes an intense magnetic field near said openings and which establishes a weak magnetic field near said cooling portions, and means for driving said rotors, a rotary magnetic refrigerator characterized in comprising:
- two of such rotors;
- housings having openings which are formed in common for said two rotors, and cooling portions which are formed independently with respect to said rotors;
- single electromagnet means for establishing an intense magnetic field near said openings;
- means for establishing a weak magnetic field near said cooling portions;
- and
- drive means for rotating said two rotors in synchronism with each other.
Dependencies are inferred from the claim text.