Abstract: A brazed heat exchanger, having a block consisting of flat tubes and fins, having header tubes arranged at opposite ends of the flat tubes and having an additional tube, which is connected to one of the header tubes. To reduce brazing defects, provision is made for at least a significant part of an outer surface of the additional tube and/or of the header tubes to be of enlarged design.

Abstract: A brazed heat exchanger, having a block consisting of flat tubes and fins, having header tubes arranged at opposite ends of the flat tubes and having an additional tube, which is connected to one of the header tubes. To reduce brazing defects, provision is made for at least a significant part of an outer surface of the additional tube and/or of the header tubes to be of enlarged design.

Abstract: A heat exchanger that includes a collecting tank having a collecting tank edge, a tube plate including a tube plate edge, and a seal arrangement with a seal between the collecting tank and tube plate. The heat exchanger further includes a seal support frame, and the seal is arranged on the seal support frame and the seal is inlaid together with the seal support frame between the tube plate edge and the collecting tank edge.

Abstract: A quick-action closure coupling for connecting a supply or discharge line to a wall of a collecting tank of a heat exchanger. The coupling can include a first coupling part and a second coupling part dimensioned to mate together. At least one sealing ring can be positioned between the first and second coupling parts. A latch can be provided in order to lock the coupling parts together. In order to simplify the quick-action closure coupling, the terminal end of the one coupling part can have a mitered cutout into which is received a portion of the other coupling part.