| 摘要 |
PURPOSE:To simplify management over a forming of rib by a method wherein a group of ribs is comprised of a group of reinforcing ribs in which two pipe plates are adhered and abutted to each other and brazed and a group of heat exchanging ribs having less projecting amount than that of a group of reinforcing ribs are combined to each other. CONSTITUTION:A group of reinforcing ribs 2 having a shape mainly suitable for reinforcing operation and a group of heat exchanging ribs 3 having a shape to improve a maze passage forming effect without increasing a height of ribs and restricting it as much as possible and without increasing the flowing resistance of fluid are applied to make a group of complex type rib. Due to this fact, it is possible to improve heat exchanging performance while sufficiently restricting a pressure loss of the heat exchanging fluid to as little as possible and further management over a manufacturing step is simplified.
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