| 摘要 |
PROBLEM TO BE SOLVED: To improve the mutual brazing property of two plate-like parts. SOLUTION: At least one plate-like part out of the two plate-like parts is formed with a base part 20 brazed abutting on the other plate-like part, and a plurality of projecting parts 21 projected from the base part 20 to the opposite side to the other plate-like part. The base part 20 and the projecting parts 21 are formed in stripe shape extending in a longitudinal direction, and spaces formed between the projecting parts 21 and the other plate-like part constitute internal fluid passage parts 22. The projecting part 21 has a first projecting part 21a and a second projecting part 21b lower in projecting height from the base part 20 than the first projecting part 21a. The second projecting part 21b and the base part 20 constitute an external fluid passage part 23 for an external fluid to flow in a width direction. COPYRIGHT: (C)2009,JPO&INPIT
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