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Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/255430
Kind Code:
A1
Abstract:
A refrigeration cycle device includes: a first channel switching valve having first to fourth ports; a second channel switching valve and a third channel switching valve each having fifth to seventh ports; a compressor; a discharge pipe connecting an outlet of the compressor and the first port; a first high-pressure pipe connecting the discharge pipe and the fifth port; a bypass expansion valve provided in the first high-pressure pipe; a first outdoor heat exchanger connected to the seventh port of the second channel switching valve; a second outdoor heat exchanger connected to the seventh port of the third channel switching valve; and a control device. When switching the second channel switching valve or the third channel switching valve, the control device performs differential pressure securing processing in which, if a first condition is not satisfied, an operation frequency of the compressor is set to a first frequency and an opening degree of the bypass expansion valve is set to a first opening degree, and if the first condition is satisfied, the operation frequency of the compressor is set to a second frequency greater than the first frequency or the opening degree of the bypass expansion valve is set to a second opening degree greater than the first opening degree.

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Inventors:
TASHIRO YUSUKE (JP)
HAYAMARU YASUHIDE (JP)
SATO MASAKAZU (JP)
KONDO MASAKAZU (JP)
KAWASHIMA ATSUSHI (JP)
Application Number:
PCT/JP2019/036544
Publication Date:
December 24, 2020
Filing Date:
September 18, 2019
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B41/06; F25B1/00
Domestic Patent References:
WO2017094148A12017-06-08
WO2014083867A12014-06-05
WO2018008139A12018-01-11
WO2017068902A12017-04-27
WO2019146139A12019-08-01
WO2017094148A12017-06-08
Foreign References:
JP2011257108A2011-12-22
KR20130087842A2013-08-07
JP2004150580A2004-05-27
JP2012177470A2012-09-13
JP2006266667A2006-10-05
Other References:
See also references of EP 3985325A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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