| 摘要 |
A ratio (Nc/Lc), in a condenser core portion, of the number of louvers to a width of a condenser cooling fin, and a ratio (Nr/Lr), in a radiator core portion, of the number of louvers to a width of a radiator cooling fin satisfy that the ratio in one core portion, out of the condenser and the radiator core portions, a required radiation amount of which is larger than that of the other core portion is larger than the ratio in the other core portion. Thus, in the core portion having a small required radiation amount, the number of louvers relative to the width of the cooling fin is small thereby decreasing the heat transfer ratio. However, by this, the air flow resistance in this core portion decreases thereby increasing an air flow amount. Thus, the radiation amount of the core portion of which required radiation amount is large increases.
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