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Patent Searching and Data


Title:
AIR-CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/019687
Kind Code:
A1
Abstract:
This air conditioning device (1) is provided with a first refrigerant circuit (2) in which a first refrigerant is sealed, and a second refrigerant circuit (3) in which a second refrigerant is sealed. The first refrigerant circuit (2) includes: a compressor (10) that compresses the gaseous first refrigerant; an outdoor heat exchanger (13) that performs heat exchange between the first refrigerant and the outside air; an expansion device (24) that depressurizes and expands the first refrigerant; and a first flow path (H1) through which the first refrigerant flows, in an intermediate heat exchanger (22) that causes heat exchange between the first refrigerant and the second refrigerant. The second refrigerant circuit (3) includes: a pump (23) that boosts and conveys the liquid second refrigerant; a second flow path (H2) through which the second refrigerant flows, in the intermediate heat exchanger (22); and indoor heat exchangers (31, 41, 51) that cause heat exchange between the second refrigerant and air blown into a room. At least one among the first refrigerant and the second refrigerant has a lower global warming potential than R32, and the lower limit of combustion concentration of the second refrigerant is higher than that of the first refrigerant.

Inventors:
YOKOYAMA TETSUHIDE (JP)
YANACHI SATORU (JP)
ITO MASAHIRO (JP)
NAGANO TOMOHIRO (JP)
NISHIYAMA TAKUMI (JP)
SATO TSUYOSHI (JP)
Application Number:
PCT/JP2019/029838
Publication Date:
February 04, 2021
Filing Date:
July 30, 2019
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F24F5/00
Domestic Patent References:
WO2018181057A12018-10-04
WO2017122517A12017-07-20
Foreign References:
JP2008209075A2008-09-11
JP2006003079A2006-01-05
JP2016516099A2016-06-02
JP2010530952A2010-09-16
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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