Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2019/207741
Kind Code:
A1
Abstract:
A control device (70) operates a compressor (24) with an indoor expansion valve (12) in a closed state, sending refrigerant from the compressor suction side to the compressor discharge side and placing the compressor discharge side in a refrigerant accumulation state and placing the compressor suction side in a substantially vacuum state. A bypass-opening operation is then carried out in which an opening/closing valve (27) is opened with the compressor (24) in a stopped state, thereby causing refrigerant to flow from the compressor discharge side to the compressor suction side through a bypass pipe (28). In this bypass-opening operation, when the suction pressure reaches a prescribed pressure a piping volume is evaluated on the basis of the compressor-discharge-side pressure, and the change in the compressor suction pressure and/or the time required for the compressor suction pressure to change.
Inventors:
XUE JUN (JP)
NAITO KOJI (JP)
YOKOZEKI ATSUHIKO (JP)
NAITO KOJI (JP)
YOKOZEKI ATSUHIKO (JP)
Application Number:
PCT/JP2018/017098
Publication Date:
October 31, 2019
Filing Date:
April 26, 2018
Export Citation:
Assignee:
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC (JP)
International Classes:
F25B49/02; F24F1/26; F25B1/00
Foreign References:
| JP2007240108A | 2007-09-20 | |||
| JP2006183979A | 2006-07-13 | |||
| JP2001280756A | 2001-10-10 |
Other References:
See also references of EP 3578904A4
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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