CRYOGENIC COOLING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a cryogenic cooling device capable of eliminating the need of stopping the operation even if the level of liquid helium in a storage tank is excessively lowered and capable of effectively utilizing the heat energy of helium gas heated by a cryogenic compressor. SOLUTION: This cryogenic cooling device is constituted by being provided with a branch gas line branched from an intermediate part between the cryogenic compressor and a closed cycle refrigerator and a heat exchanger for a storage tank performing heat exchange between a part of the helium gas discharged from the cryogenic compressor and the liquid helium in the storage tank. The flow rate of the helium gas flowing in the heat exchanger for the storage tank can be regulated by controlling the opening of a flow control valve. COPYRIGHT: (C)2005,JPO&NCIPI