HEAT ABSORBING PLATE

PROBLEM TO BE SOLVED: To enhance a dehumidifying effect while keeping a cooling effect by radiation in a high level by promoting dew condensation and making droplets easily drop by promotion of the dew condensation.SOLUTION: There is provided a heat absorbing plate 3 which is vertically installed and circulates a heating medium inside. A plurality of fins 5 are continuously disposed in a vertical direction on the outer surface of the heat absorbing plate 3, the fin having a protruding cross section that promotes generation of the droplet-like dew condensation more than the outer surface of the plate. The protruding tip part of the fin 5 is formed into a predetermined width w that promotes dropping of the droplets produced by the dew condensation, and a spacing t of adjoining fins 5 is set to be larger than at least the width w of the protruding tip part of the fin 5.