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Patent Searching and Data


Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2017/168504
Kind Code:
A1
Abstract:
This air conditioner is provided with: a plurality of indoor units each including at least an indoor-side heat exchanger; an outdoor unit including at least a compressor, an outdoor-side heat exchanger, an intermediate pressure expansion valve, and a plurality of expansion valves corresponding to the respective indoor units; refrigerant piping through which a refrigerant circulates between the indoor units and the outdoor unit; a control unit that controls operations/stoppages of the plurality of indoor units separately; and a refrigerant temperature sensor that detects respective intermediate-position temperatures of a plurality of paths which form the indoor-side heat exchanger. The control unit is configured to: determine, on the basis of values detected by the refrigerant temperature sensor in an indoor unit that is in an operation stop state among the plurality of indoor units, whether or not the temperature difference among the intermediate-position temperatures of the plurality of paths in the corresponding indoor-side heat exchanger is greater than a target temperature value; and perform a refrigerant recovery operation by adjusting, according to the determination result, the opening degree of the expansion valve corresponding to the indoor unit in the operation stop state.

Inventors:
NAITO, Shunsuke (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2016/059863
Publication Date:
October 05, 2017
Filing Date:
March 28, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F25B13/00; F24F11/02; F25B1/00; F25B6/02; F25B39/04; F25B49/02
Foreign References:
JPH04295553A1992-10-20
JPH09236348A1997-09-09
JPH11264620A1999-09-28
JPH11325639A1999-11-26
JP2007303696A2007-11-22
JP2011149612A2011-08-04
JP2002243244A2002-08-28
JP2001221526A2001-08-17
JPH07127942A1995-05-19
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (East 8F, TORANOMON TWIN BLDG. 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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