Title:
PIPE HAVING GROOVED INNER SURFACE WITH EXCELLENT EXTRUDABILITY
Document Type and Number:
WIPO Patent Application WO/2011/152384
Kind Code:
A1
Abstract:
Provided is an optimum fin shape with excellent extrudability and heat exchange efficiency compared to conventional pipes having a straight grooved inner surface that uses an aluminum alloy. Specifically provided is a pipe having a grooved inner surface (100) made of an aluminum alloy, said pipe having a plurality of pointed fins (102) that are present on the inner surface of the pipe parallel to the longitudinal direction of the pipe; the shape and position of said plurality of fins (102) in a cross section orthogonal to the longitudinal direction of said pipe having a grooved surface (100) are roughly uniform in the circumferential direction of said pipe having a grooved surface (100); and the ratio between the length (F (mm)) of the inner peripheral edge in said cross section, and the area (A (mm2)) of the groove space section enclosed by circles that touch the inner peripheral edge and the tips of said plurality of fins (102) in said cross section is within a range of 10 ≤ F/A ≤ 15.
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Inventors:
WAKAGURI SATOSHI (JP)
Application Number:
PCT/JP2011/062455
Publication Date:
December 08, 2011
Filing Date:
May 31, 2011
Export Citation:
Assignee:
FURUKAWA SKY ALUMINUM CORP (JP)
WAKAGURI SATOSHI (JP)
WAKAGURI SATOSHI (JP)
International Classes:
F28F1/40; F28F21/08
Domestic Patent References:
| WO2009131072A1 | 2009-10-29 |
Foreign References:
| JP2010096453A | 2010-04-30 | |||
| JP2005127570A | 2005-05-19 | |||
| JP2001289585A | 2001-10-19 |
Attorney, Agent or Firm:
SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)
SK patent business corporation (JP)
SK patent business corporation (JP)
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Claims: