COOLING STRUCTURE OF ELECTRONIC PART

摘要

PROBLEM TO BE SOLVED: To effectively supply cold air to a part to be cooled. SOLUTION: In this cooling structure, an air intake guide plate 67 arranged on the circumferential part of a ventilating box 48 along the vertical direction. The mounting part 67A of the air intake guide plate 67 is fixed to the circumferential part of the ventilating box 48, and the top end part of an air intake guide part 67B raised from the mounting part 67A is opposed to a cold air output port 58 formed on the vehicle lateral directional inside wall part 30D of an inner box part 30. The position of the air guide part 67B is set to a position for dividing the area of the opening part of the cold air output port 58 in a prescribed ratio of S1:S2, and the air intake guide part 67B is set to this position. Thus, the quantity ratio of a cold air carried in an air passage 54A to a cold air W2 carried in an air passage 54B is controlled to increase, for example, the capacity of the air passage 54A on the side having an element 69 having a large calorific value such as power transistor.