| 摘要 |
PURPOSE:To achieve effective cooling, by arranging a power controller section between a blower section and a motor section, then fixing power elements tightly to a casing thermally coupled with a blower fan casing which is cooled with suction air. CONSTITUTION:Power elements 17-1, 17-2 are fixed tightly to the inner wall of a blower casing section 20-1 which is cooled continuously with suction air during operation or the inner wall of the casing 20-2 for a power controller thermally coupled with the blower casing section 20-1. Blower section D is controlled variably through the output of motor shaft, and the air sucked through a suction port 23 is delivered through a delivery port 24 so as to maintain the fan casing section 20-1 of the blower section D at the temperature of the suction air. |
