Heat exchange – With coated – roughened or polished surface
Patent
1997-02-04
2000-01-11
Flanigan, Allen
Heat exchange
With coated, roughened or polished surface
165153, 228183, F28D 103
Patent
active
06012511&
ABSTRACT:
A plurality of tubes (3) for flowing a heat transfer tedium, a plurality of fins (4), and tanks (1) connected to the tubes (3) is provisionally assembled. Each of the tubes (3) comprises a pair of formed plates (3a, 3b) coupled to each other. Each of the formed plates (3a, 3b) has a peripheral portion (20) and a plurality of protrusions (14) formed on an inside thereof and having through-holes in top ends thereof. The outer surface of the provisional assembly is coated with a noncorrosive flux (40) in an amount rate of 3 g/m.sup.2 or more on the base of the total area of the outer surfaces and inner surfaces of the tanks, fins and tubes. Then, the provisional assembly is subjected to a brazing treatment. The noncorrosive flux (40) is melted and flows to penetrate into the inside of the tubes (3) through the through-holes (45, 18a) to bond the paired formed plates to each other.
REFERENCES:
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patent: 4831701 (1989-05-01), Yutaka
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patent: 5005285 (1991-04-01), Ishii
patent: 5651412 (1997-07-01), Williams et al.
patent: 5654042 (1997-08-01), Watanabe et al.
Hosoi Kiyohito
Shinmura Toshiharu
Suto Kazuhiko
Flanigan Allen
Sanden Corporation
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