| 摘要 |
PURPOSE:To reduce static pressure loss while keeping heat exchanging efficiency as it is by a method wherein the ratio of the mutual interval of fins for a flow path defining element to the height of the fin is set within a specified range. CONSTITUTION:In case a plate 2, made of resin and having the thickness of 0.1mm, a fin 3, made of resin and having the height H of 2.9mm, one series of connecting plate 5, made of resin and having the thickness of 0.1mm, are used in the flow path defining element 4 of ladder type and the ratio P/H of the pitch P of the fins to the height H of the fin is changed from 1.0 to 20.0 under the air processing amount of 1,000m<3>/h, heat exchanging efficiency eta1 is reduced suddenly when the P/H is changed from 1.0 into 2.0, however, it is not changed substantially when the ratio P/H is changed from 3.0 to 20.0. On the other hand, a static pressure loss DELTAP is reduced when the P/H is increased, however, the reduction of the pressure loss becomes slow when the P/H is 10.0 or higher. When the P/H is set within the range of 3.0 to 10.0, the static pressure loss in the air flow path between fins may be reduced while the overall size of the profile and the heat exchanging efficiency of the exchanger may be maintained as it is.
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