| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger in which bonding metal of brazing filler material is reliably filled between a flat pipe and a case adjacent to each other.SOLUTION: Flat pipes 12 in the layered state are stored within a case 11, the flat pipes 12 are bonded to each other with brazing and the flat pipes 12 are bonded to an inner surface part of the case 11 with brazing. Therein, the flat pipe 12 has a rectangular cross-section shape consisting of length side parts 32b and width side parts 32a which face each other and a cross-section corner part of the flat pipe 12 is formed such that a radius of a corner part ranging from one side length side part 32b located on the upper side to the width side part 32a gets larger than a radius of a corner part ranging from the other side length side part 32b located on the lower side to the width side part 32a. |
