| 摘要 |
PROBLEM TO BE SOLVED: To improve heat exchanging efficiency more from high-temperature fluid to low-temperature fluid in a heat exchanger.SOLUTION: A heat exchanger comprises a plurality of plates and a fin connecting adjoining plates to each other of the plurality of plates. The fin comprises a first portion forming a wall surface and having at least one first opening part having a first opening, and a second portion forming a wall surface paired with that of the first portion and different from that of the first portion and having at least one second opening part having a second opening paired with the first opening. Further, the fins are formed into a corrugation shape by sets of the first portion and the second portion, and the walls of the first portion and the second portion are arranged in a direction crossing a flowing direction of second fluid at a right angle. Then, at least a part of the first opening and the second opening forming at least one opening pair of opening pairs of the set of the first opening and the second opening keeps a non-overlapped positional relation in which they are not overlapped along the flowing direction of the second fluid.SELECTED DRAWING: Figure 3 |
