Cold accumulating material for extremely low temperature cold, refrigerator using the same and heat shielding member

摘要

PCT No. PCT/JP97/03956 Sec. 371 Date Aug. 21, 1998 Sec. 102(e) Date Aug. 21, 1998 PCT Filed Oct. 30, 1997 PCT Pub. No. WO98/18880 PCT Pub. Date Jul. 5, 1998A cold accumulating material for extremely low temperature cold 1 is formed by filling pores 3 of a porous carrier 2 with magnetic particles 4 containing a rare earth element. The porous carrier 2 is desired to be formed of a sheet-shaped porous metal. A refrigerator according to this invention contains a cold reserving unit 5 filled with the aforementioned cold accumulating material for extremely low temperature cold 1. The above described structure is capable of exerting a sufficient refrigerating capacity with a small pressure loss of refrigerant (operating medium) and providing a cold accumulating material for extremely low temperature cold easy to process to a shape reducing the pressure loss and a refrigerator using the same.