Restoration the impulse tube type refrigerator and the cold reserving material which was created

摘要

PROBLEM TO BE SOLVED: To suppress the formation of a current loop caused by thermoelectromotive force being generated due to the material difference and temperature difference of each part. ;SOLUTION: An insulation cylinder 1 is provided at the inner periphery of a cold storage equipment pipe 11 of a pulse-pipe-type refrigerating machine 10 so that it surrounds a cold storage material 10. The through-hole of a refrigerant gas Gr is punched at both ends of the cold storage device pipe 11 and spacers 2a and 2b made of an insulation material are provided, thus reducing noise caused by the formation of a current loop and accurately measuring a weak physical quantity such as magnetism.;COPYRIGHT: (C)2000,JPO