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Title:
REFRIGERANT PIPE WASHING METHOD, AIR CONDITIONER REPLACEMENT METHOD, AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2004/070293
Kind Code:
A1
Abstract:
A refrigerant pipe washing method capable of reducing the use amount of refrigerant and washing operation time when working refrigerant is replaced with HFC refrigerant without changing the refrigerant pipes of an air conditioner using mineral oil-based refrigerator oil, comprising the step of washing the inside of the refrigerant pipes (6) and (7) of the air conditioner (1) using the mineral oil-based refrigerator oil by using the HFC refrigerant containing 40 wt.% or more R32 as detergent when the working refrigerant is replaced with a working refrigerant formed of the HFC refrigerant without changing the refrigerant pipes (6) and (7), whereby residual refrigerator oil can be removed.

Inventors:
MIZUTANI KAZUHIDE (JP)
MATSUOKA HIROMUNE (JP)
YOSHIMI ATSUSHI (JP)
YOSHIMI MANABU (JP)
Application Number:
PCT/JP2004/001148
Publication Date:
August 19, 2004
Filing Date:
February 04, 2004
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
MIZUTANI KAZUHIDE (JP)
MATSUOKA HIROMUNE (JP)
YOSHIMI ATSUSHI (JP)
YOSHIMI MANABU (JP)
International Classes:
F25B1/00; C09K5/04; F25B43/00; F25B43/02; F25B45/00; (IPC1-7): F25B45/00
Foreign References:
JP2002357377A2002-12-13
JP3149640B22001-03-26
JP3361765B22003-01-07
JP2001041613A2001-02-16
US6189322B12001-02-20
JPH11325621A1999-11-26
JP2002357377A2002-12-13
Other References:
"Jokyu hyojun text reito kucho gijutsu reitohen dai 3 ji kaitei", JAPAN SOCIETY OF REFRIGERATING AND AIR CONDITIONING ENGINEERS, 31 July 2000 (2000-07-31), pages 77, XP002903784
See also references of EP 1591730A4
Attorney, Agent or Firm:
Ono, Yukio (South Forest Bldg. 1-4-19, Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, JP)
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