| 摘要 |
A heat exchanger (1) has a pair of tanks (2,3) and a plurality of flat, heat transfer tubes (4) placing the pair of tanks (2,3) in communication by inserting each end portion of a heat transfer tube (4) into one of the tanks (2,3). The heat exchanger (1) includes a rib (20) protruding in at least one of an outward and an inward direction of the heat transfer tube (4) and a stopper (21) regulating an insertion length of the heat transfer tube (4) into a tank (2,3). The rib (20) and stopper (21) are provided on a surface (28,29) of an end portion of the heat transfer tube (4). A deformation of a tube end portion may be reduced or eliminated, the brazing strength at the tube end portion may be increased, and a decrease of the flow resistance may be avoided. |
