Importance

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Abstract

In a gas cycle refrigerator having a compressor (10), a gas expansion vessel containing a displacer (3, 37), a switch valve means (11, 12) between the vessel and the compressor, and a heat accumulator (15) between gas expansion chambers (21, 23) at both ends of the displacer within the vessel, the conduit between the switch valve means and one gas expansion chamber (21) has a resistance to gaseous cooling medium which substantially corresponds to the pressure loss in the heat accumulator so that pressure will change substantially at the same rate in both the gas expansion chambers at both ends of the displacer (21, 23) and thus will not undergo an undesirable force which may occur due to a difference in pressure between the gas expansion chambers. A compact structure of switch valve in such refrigerator is also disclosed.

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First Claim