Tube assembly for heat management apparatus and method of manufacturing the same

A method of manufacturing a tube assembly for a heat exchanger or heat management apparatus, the method comprising:

• manufacturing a first-row tube and a second-row tube, each of which comprises an inner fin type tube;
• manufacturing a header having a first-row tube hole and a second-row tube hole, into which ends of the first-row tube and the second-row tube are respectively inserted;
• arranging the first-row tube and the second-row tube in a longitudinal direction and forming a central connection portion that is disposed therebetween and connecting the first-row tube and the second-row tube;
• forming an embossment on a surface of the central connection portion between the first-row tube and the second-row tube, the embossment having a projection relative to the surface of the central connection portion so that condensate is drained in a longitudinal direction along the surface of the embossed central connection portion;
• forming a cut portion in the central connection portion between the ends of the first-row tube and the second-row tube inserted into the header;
• and
• inserting the ends of the first-row tube and the second-row tube into the first-row tube hole and the second-row tube hole of the header to protrude therefrom, respectively,
• wherein a length of the cut portion is based on a thickness of a material of the header and a length at which the ends of the first-row tube and the second-row tube are inserted into the header and protrude therefrom.