Title:
HEAT TRANSFER PIPE FOR FIN-AND-TUBE TYPE HEAT EXCHANGER, AND FIN-AND-TUBE TYPE HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2013/187156
Kind Code:
A1
Abstract:
Provided are a heat transfer pipe for a fin-and-tube type heat exchanger and a fin-and-tube type heat exchanger using this heat transfer pipe, with which the refrigerant-side heat transfer efficiency can be improved effectively. Trapezoidal holes (20), which are formed in flat multi-hole tubes (14) comprising aluminum or an alloy thereof, are formed such that the length of the upper base is ½ or less than the length of the lower base, the height of the hole is 0.5-0.8 times the thickness of the heat transfer pipe, and the ratio (D/h) of the hydraulic diameter D and the hole height h is in a range of 0.40-0.85, with the hydraulic diameter defined by dividing four times the cross-sectional area of the hole by the sum of the lengths of the sides of the hole. Flat multi-hole tubes (14) of this type are assembled together with fins (12) comprising aluminum or an alloy thereof to form a fin-and-tube type heat exchanger (10).
Inventors:
KAKIYAMA SHIRO (JP)
SASAZAKI MIKINE (JP)
SASAZAKI MIKINE (JP)
Application Number:
PCT/JP2013/062918
Publication Date:
December 19, 2013
Filing Date:
May 08, 2013
Export Citation:
Assignee:
SUMITOMO LIGHT METAL IND (JP)
International Classes:
F28F1/40; F25B39/00; F28F1/02
Foreign References:
| JPH1144498A | 1999-02-16 | |||
| JPH06142755A | 1994-05-24 | |||
| JP2005351600A | 2005-12-22 | |||
| JPS6126978U | 1986-02-18 | |||
| JP2011064403A | 2011-03-31 | |||
| JPS4854354U | 1973-07-13 | |||
| JP2009529621A | 2009-08-20 |
Attorney, Agent or Firm:
NAKASHIMA, Michio et al. (JP)
Nakajima Michio (JP)
Nakajima Michio (JP)
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