| 摘要 |
A method for producing a heat exchanger is provided to mold a curved pipe part and a straight pipe part of a heat exchange pipe integrally to avoid the welding thereof, thereby improving manufacturing procedure. A method for producing a heat exchanger includes the steps of molding a parent pipe element having a plurality of straight and curved pipe parts, wherein a distance between neighboring straight pipe parts(22) becomes decreased from the curved pipe parts(24) towards free ends of the straight pipe parts, compressing the ends of the neighboring straight pipe parts of the parent pipe element for making the distance(D2) between the neighboring straight pipe parts uniform, assembling a plurality of heating fins to outer peripheral surfaces of the straight pipe parts at a uniform interval, and fixing the heating fins to the heat exchange pipe.
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