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Patent Searching and Data


Title:
REFRIGERATING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2007/123087
Kind Code:
A1
Abstract:
A compressor (20) and an expander (30) are provided in the refrigerant circuit (11) of an air conditioner (10). In the compressor (20), a refrigerating machine oil is fed from an oil reservoir (27) into a compression mechanism (21). In the expander (30), a refrigerating machine oil is fed from an oil reservoir (37) into an expansion mechanism (31). The internal spaces of a compressor casing (24) and an expander casing (34) communicate with each other through a pressure-equalizing pipe (41). An oil flow regulation valve (52) is provided in an oil flow pipe (42) connecting the compressor casing (24) to the expander casing (34). The oil flow regulation valve (52) is operated according to the output signals from an oil level sensor (51). When the oil flow regulation valve (52) is opened, the oil reservoir (27) in the compressor casing (24) is allowed to communicate with the oil reservoir (37) in the expander casing (34), and the refrigerating machine oil moves through the oil flow pipe (42).

Inventors:
SAKITANI KATSUMI (JP)
OKAMOTO MASAKAZU (JP)
KUMAKURA EIJI (JP)
OKAMOTO TETSUYA (JP)
Application Number:
PCT/JP2007/058287
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 MASAKAZU (JP)
KUMAKURA EIJI (JP)
OKAMOTO TETSUYA (JP)
International Classes:
F25B1/00; F25B11/02; F25B43/02
Foreign References:
JP2007113815A2007-05-10
JP2007024439A2007-02-01
JP2001141315A2001-05-25
JP2003240366A2003-08-27
JP2000241033A2000-09-08
JP2005299632A2005-10-27
JP2005002832A2005-01-06
Other References:
See also references of EP 2015003A4
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (5-7 Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, JP)
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