STATIC MAGNETIC REFRIGERATOR

摘要

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