Heat exchanger folded tube is obtained by folding metallic band to delimit two parallel channels with separate upper faces and common lower edge, band lateral edges folded to form partition between channels

摘要

The tube (1) is obtained by turning a metallic band on itself so as to delimit two parallel channels (4a,4b) with separate upper faces (3a,3b) having a common lower edge (2) and being in contact by two band lateral edges. The two edges are folded at a right angle to form a separating partition (6) between the two channels. To improve the simultaneous contact between the partition edges and the internal face of the tube's lower face, the ends of the two edges have a decreased thickness before folding.