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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/207741
Kind Code:
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.

XUE Jun (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NAITO Koji (INC. 16-1, Kaigan 1-chome, Minato-k, Tokyo 22, 〒1050022, JP)
YOKOZEKI Atsuhiko (INC. 16-1, Kaigan 1-chome, Minato-k, Tokyo 22, 〒1050022, JP)
Application Number:
Publication Date:
October 31, 2019
Filing Date:
April 26, 2018
Export Citation:
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HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC. (16-1, Kaigan 1-chome Minato-k, Tokyo 22, 〒1050022, JP)
International Classes:
F25B49/02; F24F1/26; F25B1/00
Foreign References:
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (Hulic Toranomon Building, 1-18 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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