Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/245918
Kind Code:
A1
Abstract:
This refrigeration cycle device is provided with: a refrigeration cycle circuit which connects a compressor, a refrigerant flow path switching device, an outdoor heat exchanger, an expansion valve and an indoor heat exchanger; a first branching which branches the refrigerant between the outdoor heat exchanger and the expansion valve; a second branching which branches the refrigerant between the indoor heat exchanger and the refrigerant flow path switching device; a bypass pipe which connects the first branching and the second branching and becomes a refrigerant flow path; a first valve which is provided between the second branching and the refrigerant flow path switching device; a second valve which is provided in the bypass pipe; a first temperature sensor which detects the temperature in the chamber to which air that has passed through the indoor heat exchanger is supplied; and a second temperature sensor which detects the temperature of the liquid-side refrigerant in the indoor heat exchanger. In an operation state in which the compressor is operating, the expansion valve is in a fully closed state, the first valve is in an open state and the second valve is in a closed state, when there is a temperature difference between the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor, it is detected that at least one of the expansion valve and the second valve is abnormal.
Inventors:
OCHIAI YASUTAKA (JP)
Application Number:
PCT/JP2019/022184
Publication Date:
December 10, 2020
Filing Date:
June 04, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B49/02; F24F11/38; F25B13/00; F24F140/12; F24F140/20
Foreign References:
| KR20180085275A | 2018-07-26 | |||
| JP2000274896A | 2000-10-06 | |||
| JP2016508590A | 2016-03-22 | |||
| KR20050114111A | 2005-12-05 | |||
| CN106352472A | 2017-01-25 | |||
| JP2000274896A | 2000-10-06 |
Other References:
See also references of EP 3982063A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
Download PDF: