Title:
REFRIGERATION CYCLE DEVICE AND CONTROL METHOD FOR DETERMINATION OF LEAKS IN BYPASS VALVE OF REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/122479
Kind Code:
A1
Abstract:
This refrigeration cycle device is equipped with: a bypass pipe 27 which has one end 27a that is connected to an outdoor side liquid pipe 22c between an outdoor heat exchanger 13 and indoor heat exchangers 30 and another end 27b that is connected to a suction pipe 22b of a compressor 10; a bypass valve 28 which controls the flow of a refrigerant in the bypass pipe 27; a floodback determination unit which determines the presence or absence of floodback of the refrigerant to the compressor 10; and a bypass valve leakage determination unit which determines whether or not the floodback has been caused by leaks in the bypass valve 28 on the basis of the suction superheat degree of the refrigerant obtained in the suction pipe 22b upstream of the other end 27b of the bypass pipe 27.
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Inventors:
KATO TAKAHIRO (JP)
YASUDA TATSUHIRO (JP)
YASUDA TATSUHIRO (JP)
Application Number:
PCT/JP2016/086936
Publication Date:
July 20, 2017
Filing Date:
December 12, 2016
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B49/02; F25B1/00
Foreign References:
| JP2009222272A | 2009-10-01 | |||
| JPH0719642A | 1995-01-20 | |||
| JPH04324066A | 1992-11-13 | |||
| JP2008112322A | 2008-05-15 |
Other References:
See also references of EP 3361190A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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