The present invention even when the brazing material flows generated at the outer peripheral surface of the tube, to provide a heat exchanger and a manufacturing method thereof capable of preventing the brazing material clogging of the heat medium circulation holes effectively.
A is provided with the grooves 24 extending in the width direction of the tube 20 on the outer peripheral surface of the end portion side of each tube 20, brazing material flows into the header 10 from the connecting hole 11, brazing to the outer peripheral surface of the tube 20 even if the wood flow occurs, it is possible to prevent the flow of the brazing material into the tip end side of the tube 20 by the groove 24. Thus, never brazing material to close the heating medium flow hole 21 flows to the end face of the tube 20. In this case, since so as to position the distal end of the tube 20 than the edge portion of the connection hole 11 a groove 24 in the inner surface of the header 10, the grooves 24 are buried in the fillet F is formed on the inner surface of the header 10 there is no.
.FIELD 5