Folded or electro-welded tube for brazed heat exchanger of motor vehicle, has brazing layer formed on part of external surfaces of tube, and slots authorizing passage of external brazing on half of length of internal separation wall

摘要

The tube has a rectangular metallic sheet (1) that is folded for obtaining an internal separation wall of channels. A brazing layer is formed on a part of external surfaces of the tube. Slots (6, 6') authorize the passage of external brazing on half of the length of the internal separation wall, where the slots are interrupted by material bridges (8, 8'). Each slot has a length larger than that of each bridge. Anti-corrosion coated layers are formed on internal surfaces of the channels. An independent claim is also included for a method for manufacturing a tube.