| 摘要 |
PROBLEM TO BE SOLVED: To promote the wetting of a corrugated fin type material by a method wherein overflow weirs are arranged in such a manner that a liquid may be supplied to both sides of a second heat-exchanging passage, and the corrugated fin type material is extended so as to be higher than the second heat-exchanging passage so that the liquid may surely flow into respective corrugations. SOLUTION: Horizontally oriented corrugated fin type materials 32 are arranged in overflow weirs 26. The overflow weirs 26 is separated from a second heat-exchanging passage by a dividing bar 34 on which a corrugated fin type material 25 is mounted. In order to surely wet all the corrugations, e.g. a corrugation 36, the corrugated fin type material 25 is formed so as to exceed the top part of the second heat-exchanging passage 22, in other words, so as to extend above a plate 18. In order to supply the liquid to the corrugation 36 of the corrugated fin material 25, collecting pools 38 are provided in such a manner that the overflow weirs 26 may be arranged between the collecting pools 38.
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