Title:
TURBO REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2020/195816
Kind Code:
A1
Abstract:
Provided is a turbo refrigerator capable of suppressing air loss generated in a rotary shaft of a turbo compressor and acquiring a cooling amount necessary for cooling magnetic a bearing which supports the rotary shaft. A turbo compressor (3) is provided with: an impeller; a rotary shaft (24) that rotates the impeller; a magnetic bearing (30) that supports the rotary shaft (24); a gas refrigerant supply pipe (14) through which a gas refrigerant is supplied as a cooling medium to magnetic bearing coils (30a), (30b) from a condenser which is a high-pressure part and which is on the upstream side of an expansion valve in a refrigeration cycle; and a refrigerant return pipe through which the gas refrigerant having passed through the magnetic bearing coils (30a), (30b) is guided to an evaporator which is a low-pressure part on the downstream side of the expansion valve in the refrigeration cycle.
Inventors:
HASEGAWA YASUSHI (JP)
YAWATA NAOKI (JP)
KANEKO TAKESHI (JP)
YAWATA NAOKI (JP)
KANEKO TAKESHI (JP)
Application Number:
PCT/JP2020/010470
Publication Date:
October 01, 2020
Filing Date:
March 11, 2020
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F04D29/58; F04D29/058; F25B1/053
Domestic Patent References:
| WO2018022343A1 | 2018-02-01 | |||
| WO2019188616A1 | 2019-10-03 |
Foreign References:
| JP2010506087A | 2010-02-25 | |||
| JP2000002469A | 2000-01-07 | |||
| JPH0179520U | 1989-05-29 |
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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