Abstract: In a heat exchanger made of stacked tubular elements, the tubular elements are formed from pressed plates bearing on one another. The plates enclose between them a cavity which is connected via corresponding orifices to the cavity of the tubular element adjacent in each case. In order to fix the stacked plates in their position and reliably prevent slipping along the tubular element plane, all the plates of the heat exchanger are provided with a congruent fixing orifice, into which a fixing rod can be inserted. A method for manufacturing the heat exchanger is also disclosed.

Abstract: Heat exchangers, which are formed by the cassetting of flat tubes and corrugated fins arranged alternately thereof, are subject to the risk of leading to a deforming of the flat tubes in the case of excessive internal pressures and thus to damage to the heat exchanger. A manufacturing process is suggested including curving the bent edges of the corrugated fins convexly toward the outside so that, during the cassetting, the lateral flanks of the flat tubes are pressed in concavely. This results in a higher bursting pressure.

Abstract: An apparatus for a heat exchanger includes first and second flat tubes, a corrugated fin which is connected to and between said flat tubes and which is subjected to an air flow passing across the heat exchanger. The corrugated fin has a plurality of vanes or gills disposed transverse to the air flow direction and a stiffening bead formed thereon between two of the plurality of gills. The stiffening bead is disposed transverse to the air flow direction.