Brazed heat exchanger and method of making the same

Details Brazed heat exchanger and method of making the same Brazed heat exchanger and method of making the same

1989-01-09

1989-10-31

Nilson, Robert G.

Heat exchange

Side-by-side tubular structures or tube sections

With manifold type header or header plate

138 943, F28D 102

Patent

active

048770833

ABSTRACT:
Poor brazed joints in a heat exchange caused by improper venting during the brazing process are eliminated through the use of a baffle for disposition in a slot 32 in a tubular header 10, 12 which is formed of a plate-like metal piece having first and second peripheral sections 36, 40 of approximately the same extent. The first section 36 has a size at least as large as the outer dimension of the tubular header 10, 12 while the second section 40 has a size and shape approximately equal to a corresponding interior section of the tubular header 10, 12 and a notch 46 is disposed in the first section 36 and extends inwardly a distance 2t greater than the wall thickness t of the tubular header. The notch 46 provides a vent path during the brazing process which is subsequently filled by the capillary flow of molten braze metal 52 into the bottom 50 of the notch.

REFERENCES:
patent: 4825941 (1989-05-01), Hoshino

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