REFRIGERATION CYCLE DEVICE - MITSUBISHI ELECTRIC CORP

Title:

REFRIGERATION CYCLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2016/113899

Kind Code:

A1

Abstract:

A refrigeration cycle device is provided with: a main circuit 30 which is formed by connecting in a loop a compressor 1, a condenser 3, a main expansion valve 4, and an evaporator 5 and through which a refrigerant having a higher boiling point than R407C circulates; a bypass circuit 40 (discharge gas bypass circuit 6 and suction bypass circuit 8) which combines a part of a refrigerant discharged from the compressor 1 and a refrigerant flowing out of the condenser 3 and causes the combined refrigerants to flow into the suction side of the compressor 1; a negative-pressure adjustment valve (discharge gas bypass valve 7) for adjusting a flow rate in the bypass circuit 40; and a negative-pressure prevention control means 20a for controlling the negative-pressure adjustment valve 7 to perform negative-pressure prevention operation for preventing the suction pressure of the compressor 1 from becoming negative.

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Inventors:

SAIKUSA TETSUJI (JP)
KADOWAKI KIMITAKA (JP)
OBAYASHI TOMOYOSHI (JP)

Application Number:

PCT/JP2015/051068

Publication Date:

July 21, 2016

Filing Date:

January 16, 2015

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

F25B1/00

Domestic Patent References:

WO2014112615A1	2014-07-24
WO2012127834A1	2012-09-27

Foreign References:

JP2001280669A	2001-10-10
JP2009041845A	2009-02-26
JP2010007874A	2010-01-14
JP2012117760A	2012-06-21
US20060107671A1	2006-05-25
EP0703422A2	1996-03-27
JP2013228129A	2013-11-07
JPH0252955A	1990-02-22
JP2012229838A	2012-11-22
JPH1114165A	1999-01-22
JP2013184592A	2013-09-19

Other References: