Title:
REFRIGERATION DEVICE AND COMPRESSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/070510
Kind Code:
A1
Abstract:
A refrigerant circuit (15) comprises: a first compressor (21) that is connected to a first inlet pipe (21s) and a first discharge pipe (21d) and compresses a refrigerant; a second compressor (22) that is connected to a second inlet pipe (22s) and a second discharge pipe (22d) and compresses the refrigerant discharged from the first compressor (21); a radiator (23); and a high-pressure passage (P21) that connects the second discharge pipe (22d) and the radiator (23). A first oil-drain passage (P31) leads the oil in the second compressor (22) to the first inlet pipe (21s) and/or the intermediate port (21i) of the first compressor (21), without going through the high-pressure passage (P21).
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Inventors:
KONDOU AZUMA (JP)
ITOU TAKAMASA (JP)
TOMITA CHIHARU (JP)
ITOU TAKAMASA (JP)
TOMITA CHIHARU (JP)
Application Number:
PCT/JP2021/021018
Publication Date:
April 07, 2022
Filing Date:
June 02, 2021
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B31/02; F25B1/00; F25B1/10
Domestic Patent References:
| WO2018146848A1 | 2018-08-16 |
Foreign References:
| JP2016205767A | 2016-12-08 | |||
| JP2017180878A | 2017-10-05 | |||
| JP2013024447A | 2013-02-04 | |||
| JP2008261227A | 2008-10-30 | |||
| JP2008261227A | 2008-10-30 |
Other References:
See also references of EP 4215845A4
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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