REFRIGERATION APPARATUS AND METHOD OF MANUFACTURING SAME

Title:

REFRIGERATION APPARATUS AND METHOD OF MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/1998/029699

Kind Code:

A1

Abstract:

Other parts than an indoor unit (B) and an existing piping (21b) are removed from an existing refrigeration apparatus which uses R22 while the indoor unit (B) and the existing piping (21b) are left. A refrigerant-refrigerant heat exchanger (2) and a refrigerant pump (23) are connected to the existing piping (21b) to constitute a secondary refrigerant circuit (20). The refrigerant-refrigerant heat exchanger (2) connects thereto a primary refrigerant circuit (10). The primary refrigerant circuit (10) and the secondary refrigerant circuit (20), respectively, are filled with R407C. A design pressure for a primary piping (11) is higher than that for a secondary piping (21) which is designed for R22.

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Inventors:

SADA SHINRI (JP)
TANAKA OSAMU (JP)

Application Number:

PCT/JP1997/004865

Publication Date:

July 09, 1998

Filing Date:

December 25, 1997

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
SADA SHINRI (JP)
TANAKA OSAMU (JP)

International Classes:

F28D15/02; F25B13/00; F25B25/00; F25B7/00; F25B9/00; (IPC1-7): F25B1/00; F28D15/02

Foreign References:

JPH07269964A	1995-10-20
JPH07301433A	1995-11-14
JPS6358062A	1988-03-12

Other References: