Patent ID: 6687995
Filing Date: 2004-02-10
Classification: B21D,B23K,F28D,F28F,Y10T

Abstract:
Heat exchanger comprising:extruded profiled pipes composed of aluminum or aluminum alloy, the profiled pipes are arranged parallel to one another and are connected with their two ends to a manifold, respectively, wherein between neighboring sides of two profiled pipes a lamella arrangement is connected by brazing, wherein at the outer side of the profiled pipe (11) between the manifold (10) and the lamella arrangement (12) at least one obstruction (13), extending transversely to a longitudinal direction, is provided for preventing the soldering agent flow, wherein in the obstruction (13) grooves extending in the longitudinal direction of the profiled pipe and produced by the extrusion of the profiled pipe in the extrusion direction are reduced in their depth and/or are interrupted, and that the obstruction (13) is formed as a smoothing zone of the profiled pipe, wherein the smoothing zone has a depth.