Heat exchanger

Abstract

A heat exchanger ( 1 ) includes a first manifold ( 2 ) and a second manifold ( 3 ) fluidically connected by at least one tube ( 4 ) with at least one brazed joint between one manifold ( 2,3 ) and the tube ( 4 ). The brazed joint is made of braze material. The first manifold ( 2 ) and the second manifold ( 3 ) are formed from non-braze materials with a higher melting point than the braze material. The non-braze material does not melt during brazing. At least one of the manifolds ( 2,3 ) has at least two non-braze material layers.

1 . A heat exchanger ( 1 ) comprising:
 a first manifold ( 2 );   a second manifold ( 3 );   at least one tube ( 4 ) with a tube profile ( 5 ) fluidically connecting the first manifold and the second manifold, the tube profile ( 5 ) having at least one channel ( 6 ) for a flow of a fluid between the first manifold ( 2 ) and the second manifold ( 3 ); and   at least one brazed joint between one of the first and second manifolds ( 2 , 3 ) and the tube ( 4 ), the brazed joint being made of braze material;   wherein the first manifold ( 2 ) and the second manifold ( 3 ) are formed from non-braze materials with a higher melting point than the braze material, the non-braze material being configured not to melt during brazing; and   wherein at least one of the first and second manifolds ( 2 , 3 ) has at least two non-braze material layers.   
     
     
         2 . The heat exchanger according to  claim 1 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers has an inner non-braze material layer ( 7 ) and an outer non-braze material layer ( 8 ), where the outer non-braze material layer ( 8 ) is more anodic than the inner non-braze material layer ( 7 ).   
     
     
         3 . The heat exchanger according to  claim 2 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by roll forming and welding.   
     
     
         4 . The heat exchanger according to  claim 2 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by coextrusion.   
     
     
         5 . The heat exchanger according to  claim 2 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by coextrusion followed by drawing.   
     
     
         6 . The heat exchanger according to  claim 1 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers has an inner non-braze material layer ( 7 ) and an outer non-braze material layer ( 8 ), where the outer non-braze material layer ( 8 ) has an equal or higher strength than the inner non-braze material layer ( 7 ).   
     
     
         7 . The heat exchanger according to  claim 6 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by roll forming and welding.   
     
     
         8 . The heat exchanger according to  claim 6 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by coextrusion.   
     
     
         9 . The heat exchanger according to  claim 6 ,
 wherein the at least one of the first and second manifolds ( 2 , 3 ) with the at least two non-braze material layers is formed by coextrusion followed by drawing.   
     
     
         10 . A heat exchanger ( 1 ) comprising:
 a first manifold ( 2 );   a second manifold ( 3 );   at least one tube ( 4 ) with a tube profile ( 5 ) fluidically connecting the first manifold and the second manifold, the tube profile ( 5 ) having at least one channel ( 6 ) for a flow of a fluid between the first manifold ( 2 ) and the second manifold ( 3 ); and   at least one brazed joint between one of the first and second manifolds ( 2 , 3 ) and the tube ( 4 ), the brazed joint being made of braze material;   wherein the first manifold ( 2 ) and the second manifold ( 3 ) are formed from non-braze materials with a higher melting point than the braze material, the non-braze material being configured not to melt during brazing; and   wherein at least one of the first and second manifolds ( 2 , 3 ) is formed from a single strip of a non-braze material by roll forming and welding.