AIR CONDITIONING DEVICE

Japanese Patent JP2014167381

A

PROBLEM TO BE SOLVED: To control suction moist with high controllability in using R32 as a refrigerant, in an air conditioning device having a refrigerant circuit that is provided with expansion valves at an upstream side and a downstream side of a receiver and injects a gas refrigerant from the receiver to a compressor.SOLUTION: In an air conditioning device 1, degassing control is executed to guide a gas refrigerant from a receiver 25 to a suction side of a compressor 21 through a receiver degassing pipe 30 by opening a receiver degassing valve 30a; upstream-side expansion valve supercooling degree control is executed to change openings of upstream-side expansion valves 24, 26 so that a supercooling degree of the refrigerant at outlets of radiators 23, 41 is kept at a target supercooling degree; and further downstream-side expansion valve suction moist control is executed to change openings of downstream-side expansion valves 26, 24 so that a dryness degree of the refrigerant is kept at a target dryness degree in a state that the refrigerant at the outlets of evaporators 41, 23 is moist.

YUMOTO KOMEI
KANAZAWA YUKAKO
HOSHIKA KEITARO
SHIMODA JUNICHI

JP2013226155A

September 11, 2014

October 31, 2013

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DAIKIN IND LTD

F25B43/00; F25B1/00

JPH09210491A	1997-08-12
JP2001065953A	2001-03-16
JP2001194015A	2001-07-17
JP2012193897A	2012-10-11
JP2001227822A	2001-08-24
JP2001295762A	2001-10-26
JP2002089988A	2002-03-27
JP2001221526A	2001-08-17
JPS5449661A	1979-04-19

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