METHOD OF RECOVERING REFRIGERATOR OIL

Title:

METHOD OF RECOVERING REFRIGERATOR OIL

Document Type and Number:

WIPO Patent Application WO/2007/105425

Kind Code:

A1

Abstract:

A method of recovering refrigerator oil has a first step and a second step that are performed in sequence. In the first step, the refrigerator oil is recovered from a gas side port (28) together with a part of refrigerant in that part of a refrigerant circuit (20) which communicates with the gas side port (28). The gas side port (28) is open to an interconnecting line (24) that is on the gas side of the position closed by a closing valve (26) installed at one end of a heat source side circuit (21). In the second step, the refrigerator oil is recovered from a liquid side port (27), with the gas side closing valve (26) closed, together with a part or the whole of the refrigerant in that part of the refrigerant circuit (20) which communicates with the liquid side port (27). The liquid side port (27) is open to an interconnecting line (23) that is on the liquid side of the position closed by a closing valve (25) installed at the other end of the heat source side circuit (21).

Inventors:

SHIMODA JUNICHI (JP)
WADA SADAYUKI (JP)
YAMAOKA KAZUSHI (JP)

Application Number:

PCT/JP2007/053061

Publication Date:

September 20, 2007

Filing Date:

February 20, 2007

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
SHIMODA JUNICHI (JP)
WADA SADAYUKI (JP)
YAMAOKA KAZUSHI (JP)

International Classes:

F25B45/00

Foreign References:

JP2003194437A	2003-07-09
JPH10197107A	1998-07-31
JP2004293986A	2004-10-21
JP2005037020A	2005-02-10
JP2000249433A	2000-09-14

Other References: