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Title:
CRYOGENIC REFRIGERATOR, AND DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD FOR CRYOGENIC REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2021/075274
Kind Code:
A1
Abstract:
A cryogenic refrigerator (10) comprises: a motion transformation mechanism (43) that transforms rotational motion outputted by a motor (42) to rectilinear reciprocating motion of a displacer; a measuring instrument (50) connected to the motor (42) so as to output time series data indicating the power consumed by the motor (42) or the current flowing in the motor (42); and a processing unit (100) that detects wear of sliding surfaces of a first component and a second component of the motion transformation mechanism (43) on the basis of, among the time series data, interval data that includes intake start timing or exhaust start timing.

Inventors:
MORIE Takaaki (Yokosuka Works, 19, Natsushima-ch, Yokosuka-shi Kanagawa 55, JP)
Application Number:
JP2020/037467
Publication Date:
April 22, 2021
Filing Date:
October 01, 2020
Export Citation:
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Assignee:
SUMITOMO HEAVY INDUSTRIES, LTD. (Shinagawa-ku Tokyo, 25, JP)
International Classes:
F25B9/14
Attorney, Agent or Firm:
MORISHITA Sakaki (Ebisu-Nishi Shibuya-ku Tokyo, 21, JP)
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