CRYOGENIC REFRIGERATOR
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United States of America Patent
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Issued Date -
Aug 20, 2015
app pub date -
Feb 10, 2015
filing date -
Feb 17, 2014
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Abstract
In a cryogenic refrigerator, a displacer includes a low temperature end and a high temperature end. A cylinder accommodates the displacer to be reciprocated in a longitudinal direction, and forms an expansion space which is an expansion space of a refrigerant gas between the low temperature end of the second displacer and the cylinder. The damper portion is disposed to be adjacent to the expansion space and communicates with the expansion space. A volume of the damper portion is 30% or less of a volume of the expansion space.
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