Heat exchanger header tube and method of making

Details Heat exchanger header tube and method of making Heat exchanger header tube and method of making

1992-06-30

1993-03-16

Rivell, John

Heat exchange

Side-by-side tubular structures or tube sections

With manifold type header or header plate

165153, 165175, 165906, 29890043, 29890052, F28F 902, B21D 5306

Patent

active

051936135

ABSTRACT:
A heat exchanger comprising opposed parallel header tubes having circumferentially spaced grooves along the length thereof with inclined sides and a base on the external surface of the groove and spaced annular ribs on the inner surface opposite the grooves. Each groove has a transverse slot therein for receiving open ends of an elongated flat tube. Each header tube is made by performing a rolling operation to form the grooves and ribs. Thereafter, the grooved tubes are punched to form the transverse slots in the base of the grooves.

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patent: 4989482 (1991-02-01), Mason
patent: 5052478 (1991-10-01), Nakajima et al.
patent: 5088193 (1992-02-01), Okada et al.

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