MESH-FIN HEAT EXCHANGER AND METHOD FOR MANUFACTURING THE SAME.

摘要

A heat exchanger having a plurality of heat transfer tubes (1, 1 ...) that are disposed in parallel to each other and a number of net-like fins (2, 2 ...) disposed in parallel to the tube axes and joined to said tubes. The heat transfer tubes (1) are each constituted by a pair of tube constituent members (4, 4) each of which is semi-cylindrical and has joining flanges (4a, 4b) extending along the center of the axis at the open ends thereof. The confronting joining flanges (4a, 4b) of these tube constituent members (4, 4) are pressure welded from the outside of the fins (2, 2) so as to be joined to each other. This improves efficiency in fabricating the heat transfer tubes and net-like fins together.