REFRIGERATING AND AIR CONDITIONING DEVICE

WIPO Patent Application WO/2012/042698

A1

Provided is a refrigerating and air conditioning device capable of reducing the frictional resistance generated when starting up an expander, and of providing stability during the start-up of the expander. An expansion mechanism (2), an auxiliary compression mechanism (3), and lubricating oil (32) are housed in the same singular sealed container (35). An expander (1) is provided with a lubrication mechanism which supplies lubricating oil (32) to the bearings (31) of the expansion mechanism (2) and the auxiliary compression mechanism (3) respectively. A low-pressure inlet tube (13) creates a low-pressure superheated gaseous condition inside the sealed container (35), by feeding the auxiliary compression mechanism (3) a low-pressure gas refrigerant, a gas which during the start-up of the expander (1) is sucked in by a main compression mechanism (5). Through a first high-pressure inlet tube (50), the expanding mechanism (2) of the expander (1), with the inside of the sealed container (35) in a low-pressure superheated gaseous condition, is fed a high-pressure gas refrigerant released from the main compression mechanism (5).

NAGATA HIDEAKI (JP)
KAKUDA MASAYUKI (JP)
SHIMOJI MIHOKO (JP)
SEKIYA SHIN (JP)
KODA TOSHIHIDE (JP)
KAGA KUNIHIKO (JP)

PCT/JP2011/001911

April 05, 2012

March 30, 2011

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MITSUBISHI ELECTRIC CORP (JP)
NAGATA HIDEAKI (JP)
KAKUDA MASAYUKI (JP)
SHIMOJI MIHOKO (JP)
SEKIYA SHIN (JP)
KODA TOSHIHIDE (JP)
KAGA KUNIHIKO (JP)

F25B1/10; F25B1/00

WO2006120922A1

2006-11-16

JP2009109158A	2009-05-21
JP2009063247A	2009-03-26
JP2009204201A	2009-09-10
JPS58188557U	1983-12-14
JP2009079850A	2009-04-16

KOBAYASHI, Hisao et al. (JP)
Hisao Kobayashi (JP)

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