| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for cooling the heat of sunshine in a power conversion device, capable of efficiently preventing the temperature rise due to the heat of sunshine, even in a roof installation power conversion device available even during vehicle stoppage. <P>SOLUTION: The outside air, as shown by the arrow A, which is taken in from an air inlet port 21 provided on a roof cover 13a is branched to the power conversion device 3 and a first flow passage 17; part of the taken-in outside air is circulated through the first flow passage 17, as shown by the arrows c1, c2, c3; and the remainder is circulated through the power conversion device 3, as shown by the arrows a1, a2, a3, a4, thereby cooling a semiconductor element unit 7. The outside air exhausted from a blower housing chamber 9 by a motor-driven blower 10 is branched in two directions; a part of the branched outside air is exhausted to the outside through a second flow passage 18, as shown by the arrows d1, d2, d3, d4; and the remainder is exhausted the outside, while the voltage conversion part 8 of the power conversion device 3 is cooled , as shown by the arrows b1, b2, b3, b4. <P>COPYRIGHT: (C)2009,JPO&INPIT |
