Heat Exchanger with an All-Metal Construction, in Particular an All-Aluminium Construction

Abstract

The invention relates to a heat exchanger with an all-metal construction, preferably an all aluminium construction. Said heat exchanger comprises a network ( 2 ) of ribs and tubes ( 4 ), the ends ( 4 a ) of the layer having and enlarged rectangular form, longitudinal and narrow sides and at least one U-profile ( 6 ) with collection chambers ( 3 ) that comprise lateral limbs ( 6 a , 6 b ). The longitudinal sides ( 4 b ) are connected to one another and the narrow sides ( 7 a , 7 b ) to the limbs ( 6 a , 6 b ) of the U-profile ( 6 ) by a numeral union, preferably by means of soldering. According to the invention, the U-profile ( 6 ) is optimised for tension.

1 . A heat exchanger with an all metal, preferably an all aluminium, construction, comprising a network of ribs and tubes with tube ends which are widened in rectangular shapes and have longitudinal and narrow sides, and comprising at least one collecting box which has a U profile with lateral limbs, the longitudinal sides being connected to one another, and the narrow sides being connected to the limbs of the U profile, in a materially joined fashion, preferably by means of soldering, wherein the U profile is embodied in an optimized fashion in terms of stress.  
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein the limbs of the U profile are of straight design in the region of the narrow sides and merge continuously into a round arc.  
   
   
       3 . The heat exchanger as claimed in  claim 2 , wherein the limbs merge, with a continuously increasing curvature, into the round arc which reaches its maximum curvature at an apex point.  
   
   
       4 . The heat exchanger as claimed in  claim 3 , wherein the U profile is of symmetrical or asymmetrical design with respect to a center line M which runs through the longitudinal side of the tube ends.  
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein the U profile has a height H and a width B where H>B, preferably 1.5 B H 2.0 B.