DUAL REFRIGERATION CYCLE DEVICE

Japanese Patent JP2014145557

A

PROBLEM TO BE SOLVED: To provide a dual refrigeration cycle device in which reliability is improved by suppressing dilution by a refrigerant and improving viscosity by speedily raising temperature of a lubricant to be collected in a high-temperature-side compressor in the case of activation, which is capable of shifting to safety operation in a short time and in which reliability can be improved by cooling the high-temperature side compressor to suppress overheat of a sliding part when the safety operation is continued for a long time.SOLUTION: The dual refrigeration cycle device comprises an auxiliary circuit forming a refrigeration cycle by communicating an auxiliary compressor, a four-way switching valve, a utilization-side heat exchanger, an auxiliary expansion device and a heat-source-side heat exchanger via a refrigerant piping. The utilization-side heat exchanger is provided to exchange heat with at least one of a high-temperature-side compressor forming a high-temperature-side refrigeration cycle and a low-temperature-side compressor forming a low-temperature-side refrigeration cycle.

SATODATE KOJI
SHIMADA YOSHIYUKI

JP2013015337A

August 14, 2014

January 30, 2013

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TOSHIBA CARRIER CORP

F25B1/00; F25B7/00

JP2012215353A	2012-11-08
JPS5998244U	1984-07-03
JP2004069276A	2004-03-04
JPH0313071U	1991-02-08

Patent business corporation スズエ international patent firm
Masatoshi Kurata
Toshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Toshiro Shirane
Peak Takashi
Yukinaga Yasujiro
Naoki Kono
Sunagawa 克
Iseki Mamoru 3
Takao Akaho
Tadashi Inoue
Tatsushi Sato
Okada Kishi
Mihoko Horiuchi
Masanori Takeuchi

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