Title:
Cryogenic refrigerator
Document Type and Number:
Japanese Patent JP6214498
Kind Code:
B2
Abstract:
In a cryogenic refrigerator, a valve switches between a flow passage of a low-pressure refrigerant gas and a flow passage of a high-pressure refrigerant gas. A motor drives the valve. The motor includes a rotor and a stator, the rotor located radially inward of the stator. A casing hermetically houses the rotor and the stator. The stator includes a back yoke and a magnetic member that acts as a magnetic path of an external magnetic field generated outside of the casing, the magnetic member located radially outward of and spaced apart from the back yoke. The magnetic member is hermetically housed in the casing.
Inventors:
Takaaki Morie
Application Number:
JP2014177744A
Publication Date:
October 18, 2017
Filing Date:
September 02, 2014
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
H02K55/00; F25B9/14; H02K5/02
Domestic Patent References:
| JP200835604A | ||||
| JP5268740A | ||||
| JP2002165410A | ||||
| JP6454782U | ||||
| JP2161260A | ||||
| JP2007194260A |
Attorney, Agent or Firm:
Sakaki Morishita
Yusuke Murata
Tomoyuki Miki
Tomisho Teruo
Yusuke Murata
Tomoyuki Miki
Tomisho Teruo