REFRIGERATION CYCLE DEVICE

WIPO Patent Application WO/2017/037891

A1

A refrigeration cycle device provided with a compressor, a flow path switching valve, a usage-side heat exchanger, a first expansion valve, a second expansion valve, and a heat-source-side heat exchanger, wherein: the refrigeration cycle device has a control device for performing control by switching the flow path switching valve between at least a heating operation and a defrosting operation; during the air-warming operation, the control device forms an air-warming pathway for circulating coolant through the compressor, the usage-side heat exchanger, the first expansion valve, the second expansion valve, the heat-source-side heat exchanger, and the compressor, in the stated order; and, during the defrosting operation, in the air-warming pathway, the control device forms a defrosting start circuit for circulating coolant by increasing the opening degree of the first expansion valve and the second expansion valve beyond the setting in the air-warming operation, and forms a defrosting circuit for circulating coolant through the compressor, the heat-source-side heat exchanger, the second expansion valve, the first expansion valve, the usage-side heat exchanger, and the compressor, in the stated order.

HATANAKA KENSAKU (JP)
TANAKA KOSUKE (JP)

PCT/JP2015/074949

March 09, 2017

September 02, 2015

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MITSUBISHI ELECTRIC CORP (JP)

F25B47/02

WO2014192138A1

2014-12-04

JP2003287319A	2003-10-10
JP2002318039A	2002-10-31
JP2011247476A	2011-12-08
JPH0638291Y2	1994-10-05
JPH11257719A	1999-09-24

KISA PATENT & TRADEMARK FIRM (JP)

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