Title:
OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/048898
Kind Code:
A1
Abstract:
In the present invention, the flow path from a compressor (10) to a condenser (20), the first passage (H1) of a heat exchanger (30), and a second expansion valve (40), together with a load device (3), forms a circulation flow path through which a refrigerant circulates. An outdoor unit (2) comprises: a first refrigerant flow path (91 to 94) that allows the refrigerant to flow from the portion of the circulation flow path between the outlet of the first passage (H1) and the second expansion valve (40) to the inlet of the second passage (H2); a third expansion valve (71) that is disposed in the first refrigerant flow path (91 to 94); a second refrigerant flow path (96) that allows the refrigerant to flow from the outlet of the second passage (H2) to the suction port (G1) or intermediate pressure port (G3) of the compressor (10); and a flow path switching part (74). The flow path switching part (74) includes: a first on-off valve (75) that is provided between the outlet of the second passage (H2) and the intermediate pressure port (G3); and a pressure reduction device (77) and a second on-off valve (76) that are arranged in series between the outlet of the second passage (H2) and the suction port (G1).
Inventors:
HAYASAKA MOTOSHI (JP)
ISHIKAWA TOMOTAKA (JP)
ARII YUSUKE (JP)
ISHIKAWA TOMOTAKA (JP)
ARII YUSUKE (JP)
Application Number:
PCT/JP2019/035370
Publication Date:
March 18, 2021
Filing Date:
September 09, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Domestic Patent References:
| WO2013160966A1 | 2013-10-31 |
Foreign References:
| JPH04110567A | 1992-04-13 | |||
| JP2014119221A | 2014-06-30 | |||
| JP2007263443A | 2007-10-11 | |||
| JPH10318614A | 1998-12-04 | |||
| JP2008039233A | 2008-02-21 | |||
| US20110094248A1 | 2011-04-28 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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