HEAT EXCHANGER TUBE AND METHOD OF FORMING THE SAME

摘要

The invention relates to flat heat exchanger tubes, having two narrow and two broad sides. The flat tubes can be manufactured from two continuous strips, having a relatively large curve on one longitudinal edge of the strips and having a relatively small curve on the other longitudinal edge of the strips. The two strips are arranged laterally transposed with respect to one another, to form the wall of the flat tubes, so that the relatively large curve of the longitudinal edge of one strip holds in itself the relatively small curve of the longitudinal edge of the other strip to form the narrow sides of the flat tubes. The strips are formed with at least one further contoured portion which extends in the longitudinal direction of the flat tubes and which improves the cohesion of the flat tube.