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1. (WO2013160966) AIR CONDITIONING DEVICE

Pub. No.:    WO/2013/160966    International Application No.:    PCT/JP2012/002923
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Sat Apr 28 01:59:59 CEST 2012
IPC: F25B 1/00
F25B 13/00
Applicants: Mitsubishi Electric Corporation
三菱電機株式会社
HATOMURA, Takeshi
鳩村 傑
YAMASHITA, Koji
山下 浩司
TAKENAKA, Naofumi
竹中 直史
Inventors: HATOMURA, Takeshi
鳩村 傑
YAMASHITA, Koji
山下 浩司
TAKENAKA, Naofumi
竹中 直史
Title: AIR CONDITIONING DEVICE
Abstract:
 During the execution of a heating operation in which a use-side heat exchanger is made to function as a condenser when there is low external air temperature of a pre-established level, a low external air temperature heating operation activation mode is executed in which, while refrigerant which has been discharged from a compressor is made to flow into the use-side heat exchanger, refrigerant is supplied, via an injection pipe, to an injection port in the compressor, and a part of refrigerant that is stored in an accumulator is supplied to the compressor via a connection pipe, and subsequently a transition is made to a low external air temperature heating operation mode in which, while refrigerant which has been discharged from the compressor is made to flow into the use-side heat exchanger, the refrigerant is supplied to the injection port in the compressor, via the injection pipe.