| 摘要 |
To provide a heat exchanger having an improved brazing property between an end of a tube member provided with beads and a tube hole of a header pipe.A heat exchanger that a tube member 2' has beads 21 protruded from the face of one plate toward the other plate, the tube member 2' is held by block members 31, 31, a forming jig 40 is inserted between medium passages 24, 24 formed by the beads 21 to hold to press the beads 21 at an end 2a of the tube member 2' to mutually adhere the faces of the beads 21 on the outer face of the tube member 2', and recesses formed by the mutually contacted faces of the beads 21, 21 have a cross-sectional area of about 0.2 mm<2> or below. And, a region where the recesses have a cross-sectional area of about 0.2 mm<2> or below is within 10 mm outside header pipes 3, 4. <IMAGE> |
