| 摘要 |
PROBLEM TO BE SOLVED: To prevent brazing failure from being generated between side-wall formation parts when brazing upper and lower component members. SOLUTION: A flat heat exchanger pipe A is equipped with upper and lower walls 1 and 2, and left- and right-side walls 3 across the left- and right-side edges of the upper and lower walls 1 and 2. In the flat heat exchange pipe A, a plate-shaped upper component member 20 that has an upper-wall formation part and a side wall formation part 22 being droppingly formed integrally at the left- and right-side edges of the upper-wall formation part is combined with a plate-shaped lower component member 10 that has a lower-wall formation part and a side-wall formation part 14 being formed integrally in a rising shape at the left- and right-side edges of the lower-wall formation part for mutually jointing, so that the side-wall formation part 22 of the upper component member 20 is positioned outside the side-wall formation part 14. In this case, the upper component member 20 is formed by bending the left- and right-side parts of an aluminum brazing sheet while a crease groove is set to the inside along the crease groove being formed on one side of the aluminum brazing sheet.
|
