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Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2021/065186
Kind Code:
A1
Abstract:
The present invention improves the efficiency during cooling operation in an air conditioner when the efficiency during cooling operation deteriorates as a result of using an ejector at the time of pressure loss in refrigerant piping or the like. This air conditioner (1) is provided with an ejector (50) that raises the pressure of a refrigerant using the energy of decompression/expansion of the refrigerant. A switching mechanism (20) switches between a flow of refrigerant for first operation and a flow of refrigerant for second operation. The air conditioner (1) is configured so that during first operation, refrigerant compressed by a compression mechanism (10) is made to dissipate heat by a use-side heat exchanger (32) and decompressed/expanded by the ejector (50) and the pressure of refrigerant evaporated by a heat source-side heat exchanger (31) is meanwhile raised by the ejector (50). The air conditioner (1) is also configured so that during second operation, refrigerant compressed by the compression mechanism (10) is made to dissipate heat by the heat source-side heat exchanger (31) and decompressed/expanded by a first expansion valve (41), the result is subsequently evaporated by the use-side heat exchanger (32), and refrigerant does not flow through the ejector (50).

Inventors:
YOSHIMI ATSUSHI
YAMADA TAKURO
KUMAKURA EIJI
IWATA IKUHIRO
MIYAZAKI TAKERU
Application Number:
PCT/JP2020/029351
Publication Date:
April 08, 2021
Filing Date:
July 30, 2020
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B5/04; F24F5/00; F25B1/00; F25B6/04; F25B13/00; F25B43/00
Domestic Patent References:
WO2011048662A12011-04-28
Foreign References:
CN203964450U2014-11-26
US20190242610A12019-08-08
JP2009222359A2009-10-01
JPS59225262A1984-12-18
JP2011214741A2011-10-27
JP2010085042A2010-04-15
JPH0618121A1994-01-25
CN205227906U2016-05-11
JP2009109064A2009-05-21
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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