Heat exchanger

Details Heat exchanger Heat exchanger

1998-05-04

1999-02-02

Leo, Leonard R.

Heat exchange

Radiator core type

Deformed sheet forms passages between side-by-side tube means

165173, 165177, 165183, 138115, 138117, F28D 103

Patent

active

058652434

ABSTRACT:
In a flat tube formed by machining a brazing sheet, ridges 12a-12c are formed at each of the opposing flat portions 11a and 11b of the flat tube 4 along the lengthwise direction of the flat tubes so that the ridges contact the inner surfaces of each of the opposite flat portions. The width of the grooves of the ridges 12a-12c formed at the surfaces of the flat portions is set so that it is at the smallest end portions of the flat tubes 4 to achieve flatness at the end portions of the flat tubes 4. The end portions of the fins 5 are bonded at these flattened portions 15 (areas A) formed at the end portions of the flat tubes 4. Header pipes and the flat tubes are thus brazed in a reliable manner while achieving reinforcement of the end portions of the flat tubes to be inserted into insertion holes formed in the header pipes. Through a structure in which ridges are formed at the end portions of the flat tubes and, at the same time, flatness is assured at the end portions, a good yield of the brazing material is realized at the contact areas of the header pipes and the flat tubes.

REFERENCES:
patent: 1394311 (1921-10-01), Lang
patent: 5186250 (1993-02-01), Ouchi et al.
patent: 5409057 (1995-04-01), Zifferer
patent: 5689881 (1997-11-01), Kato

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