Title:
METHOD FOR INHIBITING PROGRESS OF CORROSION IN AIR CONDITIONERS, AIR CONDITIONER, AND REFRIGERANT PIPING
Document Type and Number:
WIPO Patent Application WO/2020/080426
Kind Code:
A1
Abstract:
A method for inhibiting progress of corrosion in an air-conditioner comprising an indoor unit that has an indoor heat exchanger with refrigerant piping made from phosphorus deoxidized copper or oxygen-free copper, wherein moisture, which is present in corroded pores occurring in the refrigerant piping, is removed after a cooling operation or a dehumidification operation during air conditioner operation. This moisture removing operation is performed within the interval from after the cooling operation or the dehumidification operation is completed until a designated time period has elapsed. In addition, cuprous oxide is provided on the inner wall face of the corroded pores formed in the refrigerant piping that is formed from copper piping for air conditioners, wherein the copper piping has a copper content of 99.95% or more and an oxygen content of 10 ppm or less, and the remainder is unavoidable impurities.
Inventors:
ITO SHINICHI
KUMAGAI KENGO
HOSOGI TETSURO
KUMAGAI KENGO
HOSOGI TETSURO
Application Number:
PCT/JP2019/040722
Publication Date:
April 23, 2020
Filing Date:
October 16, 2019
Export Citation:
Assignee:
KOBELCO & MAT COPPER TUBE LTD (JP)
International Classes:
F24F11/48; F24F11/65; F28F19/00
Foreign References:
| JP2011027346A | 2011-02-10 | |||
| JP2008202813A | 2008-09-04 | |||
| JP2009168327A | 2009-07-30 | |||
| JP2004360951A | 2004-12-24 | |||
| JP2011075221A | 2011-04-14 | |||
| JPH0610166A | 1994-01-18 | |||
| JP2002303428A | 2002-10-18 |
Other References:
ATSUMI, TETSURO ET AL.: "Ant's Nest Corrosion and Its Prevention of ACR Copper Tubes based on Experience", SUMITOMO LIGHT METAL TECHNICAL REPORTS, vol. 44, no. 1, 30 January 2004 (2004-01-30), pages 69 - 75
NOTOYA, TAKENORI ET AL.: "Formicary corrosion in copper tubes in wet atmospheric conditions", SUMITOMO LIGHT METAL TECHNICAL REPORTS, vol. 30, no. 3, July 1989 (1989-07-01), pages 9 - 14
NOTOYA, TAKENORI ET AL.: "Formicary corrosion in copper tubes in wet atmospheric conditions", SUMITOMO LIGHT METAL TECHNICAL REPORTS, vol. 30, no. 3, July 1989 (1989-07-01), pages 9 - 14
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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