| 摘要 |
PURPOSE:To prevent smoothing fins from overthrowing and to reduce the quantity of a material used therefor by specifying the configuration of a cross section intersecting the longitudinal direction of each of smoothening fins and setting the bottom width dimension of each smoothening fin in a specific range with respect to the height dimension thereof. CONSTITUTION:The ratio of the bottom width dimension T of each smoothening fin 3 to the height dimension H thereof, that is T/H, is set in a range 0.5-1.5. When a smoothening fin is inclined at an angle which is the same as the conventional case, for example, and further other similar unit heat exchange member 4 is placed on the same and a load is applied thereto, a force F and a reaction force F1 applied to the smoothening fin 3 assume a state shown in the figure attached, a rotational force A is applied toward a direction of preventing the overthrow of the smoothening fins at the time of lamination, whereby it becomes possible to prevent the overthrow of the smoothening fins. In addition, by forming the sectional configuration into a trapezoidal shape, the quantity of a material used can be saved while securing the stability of the smoothening fins.
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