| 摘要 |
PROBLEM TO BE SOLVED: To control a frost layer generated on the fin surface in a heat transfer fin used for an evaporator. SOLUTION: On a cooling face surface 51 of the heat transfer fin which is one example of a heat transfer material, a plurality of pins 50 isolated in an island shape are formed. In the plurality of pins 50 on the cooling face surface 51, the pin interval d between the adjacent pins 50 is set to be twice r* or less (d≥2r*). Wherein, r* is a radius of a condensed liquid droplet condensed on the cooling face surface 51 determined based on an air condition corresponding to the atmosphere environment where the heat transfer fin is used and a heat transfer face surface temperature condition corresponding to the temperature of the cooling face surface 51, and is a critical radius which is a critical value indicating whether or not the condensed liquid droplet continues to grow in the air condition and the heat transfer face surface temperature condition. COPYRIGHT: (C)2011,JPO&INPIT
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