Patent ID: 7882708

Claim:
A heat exchanger, comprising: a soldered heat exchanger network comprising flat tubes and corrugated ribs configured so that a liquid and/or gaseous medium can flow through the flat tubes and air can flow around the corrugated ribs, and a corrugated rib having at least two rib surfaces which are arranged essentially parallel to one another and are connected by an arcuate piece joined to a flat tube, wherein the arcuate piece has a lower curvature in a middle portion than in a first outer portion and in a second outer portion, wherein the arcuate piece has in the middle portion a radius of curvature R 1 which is greater than a rib height RH of the corrugated rib, wherein the arcuate piece has in the first outer portion a radius of curvature R 2 which is lower than half a rib height RH of the corrugated rib.