REFRIGERATION DEVICE - DAIKIN IND LTD

Title:

REFRIGERATION DEVICE

Document Type and Number:

WIPO Patent Application WO/2007/123085

Kind Code:

A1

Abstract:

A refrigeration circuit (11) has a compressor (20) and an expander (30) separately. An expander casing (34) is connected to a discharge tube (26) of the compressor (20) and a high-pressure refrigerant passes through the inside of the expander casing. Accordingly the inside of a compressor casing (24) and the inside of the expander casing (34) are equalized in pressure. An oil amount adjustment valve (52) is provided in an oil flow tube (41) connecting oil containers (27, 37) of the compressor (20) and the expander (30). The oil amount adjustment valve (52) is operated based on an output signal from an oil level sensor (51). When the oil amount adjustment valve (52) is opened, the oil container (27) in the compressor casing (24) and the oil container (37) in the expander casing (34) are interconnected with each other and refrigeration machine oil moves through the oil flow tube (41).

Inventors:

SAKITANI KATSUMI (JP)
OKAMOTO TETSUYA (JP)
OKAMOTO MASAKAZU (JP)
KUMAKURA EIJI (JP)

Application Number:

PCT/JP2007/058281

Publication Date:

November 01, 2007

Filing Date:

April 16, 2007

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
SAKITANI KATSUMI (JP)
OKAMOTO TETSUYA (JP)
OKAMOTO MASAKAZU (JP)
KUMAKURA EIJI (JP)

International Classes:

F25B1/00; F25B43/02

Domestic Patent References:

WO2007023599A1

2007-03-01

Foreign References:

JP2004325019A	2004-11-18
JP2004325018A	2004-11-18
JP2000241033A	2000-09-08
JP2005299632A	2005-10-27
JP2005002832A	2005-01-06
JP2000241033A	2000-09-08
JP2005299632A	2005-10-27
JP2005002832A	2005-01-06

Other References: