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1. (WO2018122943) AIR CONDITIONER

Pub. No.:    WO/2018/122943    International Application No.:    PCT/JP2016/088831
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 28 00:59:59 CET 2016
IPC: F25B 1/00
F24F 11/02
F25B 13/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: BABA, Yohei
馬場 要平
Title: AIR CONDITIONER
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.