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Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2018/122943
Kind Code:
A1
Abstract:
An air conditioner capable of simultaneous warming and cooling operation, with which it is possible to selectively perform air-cooling operation or air-warming operation with each indoor unit, wherein a relay device is provided with: a first branch unit connected to an outdoor unit via first refrigerant piping and second refrigerant piping, the first branch unit having an opening and closing valve for selectively connecting one refrigerant inlet/outlet of an indoor heat exchanger of the indoor unit to the second refrigerant piping via the first refrigerant piping or a gas/liquid separator; a second branch unit connected to the gas/liquid separator via a first diaphragm device when the other refrigerant inlet/outlet of the indoor heat exchanger of the indoor unit is a refrigerant inlet, the second branch unit having a check valve connected to the outlet side of the first diaphragm device when the other refrigerant inlet/outlet of the indoor heat exchanger of the indoor unit is a refrigerant outlet; and a controller for setting, as the degree of opening of the first diaphragm device, an initial degree of opening at which the pressure difference ahead of and behind the first diaphragm device is at or above a reference value during startup of a compressor.

Inventors:
BABA YOHEI (JP)
Application Number:
PCT/JP2016/088831
Publication Date:
July 05, 2018
Filing Date:
December 27, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F25B13/00
Domestic Patent References:
WO2014106901A12014-07-10
Foreign References:
JPS6075864U1985-05-28
JPH04251158A1992-09-07
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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