| 摘要 |
A heat exchanger has a pair of tanks and a plurality of flat, heat transfer tubes placing the pair of tanks in communication by inserting each end portion of a heat transfer tube into one of the tanks. The heat exchanger includes a rib protruding in at least one of an outward and an inward direction of the heat transfer tube and a stopper regulating an insertion length of the heat transfer tube into a tank. The rib and stopper are provided on a surface of an end portion of the heat transfer tube. 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, thereby providing a heat exchanger capable of higher performance.
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