Title:
CRYOGENIC REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2018/168297
Kind Code:
A1
Abstract:
A cryogenic refrigerator 100 comprises: a displacer 12; a cylinder 10 forming an expansion space 24 together with the displacer 12; a Scotch yoke mechanism 14 for moving the displacer 12 in a reciprocating manner; a first rod 38 that protrudes from the Scotch yoke mechanism 14; a housing 16 having an assist chamber 62 that accommodates the distal end of the first rod 38; a rotary valve 19 that switches between a state in which the expansion space 24 and the discharge side of a compressor 1 are connected and the assist chamber 62 and the air intake side of the compressor 1 are connected, and a state in which the expansion space 24 and the air intake side of the compressor 1 are connected and the assist chamber 62 and the discharge side of the compressor 1 are connected; a motor 18 that drives the Scotch yoke mechanism 14 and drives the rotary valve 19; and an open/close valve 88 that opens and closes a gas flow path L4 connecting the rotary valve 19 and the assist chamber 62.
Inventors:
BAO QIAN (JP)
LIU CCHANGHENG (JP)
LIU CCHANGHENG (JP)
Application Number:
PCT/JP2018/004852
Publication Date:
September 20, 2018
Filing Date:
February 13, 2018
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
F25B9/14
Domestic Patent References:
| WO1993010407A1 | 1993-05-27 |
Foreign References:
| JPS5847970A | 1983-03-19 | |||
| JP2017040386A | 2017-02-23 | |||
| JP2014139498A | 2014-07-31 | |||
| JP2001241796A | 2001-09-07 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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