Patent ID: 9182156
Filing Date: 2015-11-10
Classification: B01D,F04B,F25B

Abstract:
1. A two-stage GM cryogenic refrigerator comprising: a displacer cylinder extending from a low-temperature end to a high-temperature end; a displacer including the displacer cylinder and a resin; a motor configured to drive the displacer, the motor being configured to be rotatable forward in cooling and backward in increasing a temperature; and the resin provided on an outer circumferential surface of the displacer cylinder to entirely cover the displacer cylinder from the low-temperature end to the high-temperature end, a thickness of the resin being thinner on the high-temperature end than on the low-temperature end, a total diameter of the displacer obtained by adding the resin to the displacer cylinder having a same diameter from the low-temperature end to the high-temperature end.