Static magnetic refrigerator

A static magnetic refrigerator comprising:

• a magnet generating a high-intensity magnetic field,
• a magnetic working material disposed in the high-intensity magnetic field.
• a superconducting magnetic shield disposed between the magnet and said magnetic working material, and
• a rotating means for rotating said superconducting magnetic shield,
• said superconducting magnetic shield comprising a pair of nearly parallel flat plates or a pair of outwardly curved plates facing each other and made of a superconductor, and said magnetic working material is accommodated in the inner space formed by the pair of said flat or curved plates,
• whereby a magnetization process wherein said magnetic working material is magnetized in the high-intensity magnetic field by way of rotating said superconducting magnetic shield around said magnetic working material at a position allowing the permeation of the magnetic field through said magnetic working material via the pair of said flat or curved plates and a demagnetization process wherein said magnetic working material is demagnetized by way of further rotating said superconducting magnetic shield at another position permitting the shield of the magnetic field via the pair of said flat or curved plates are repeated by said rotating means so that said magnetic working material generates coldness.

A static magnetic refrigerator comprising:

• a magnet generating a high-intensity magnetic field,
• a magnetic working material disposed in the high-intensity magnetic field,
• a superconducting magnetic shield disposed between the magnet and said magnetic working material, and
• a rotating means for rotating said superconducting magnetic shield,
• said superconducting magnetic shield comprising a pair of blocks made of a superconductor, and said magnetic working material is accommodated in the inner space formed by the pair of said blocks,
• whereby a magnetization process wherein said magnetic working material is magnetized in the high-intensity magnetic field by way of rotating said superconducting magnetic shield around said magnetic working material at a position allowing the permeation of the magnetic field through said magnetic working material via the pair of said blocks and a demagnetization process wherein said magnetic working material is demagnetized by way of further rotating said superconducting magnetic shield at another position permitting the shield of the magnetic field via the pair of said blocks are repeated by said rotating means so that said magnetic working material generates coldness.