| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switchboard capable of attaining cost reduction by reducing the number of ventilation fans, and also improving reliability. <P>SOLUTION: This switchboard comprises: a box body 1 having a plurality of unit chambers 4 partitioned therein and an aggregated duct 6 extending vertically; inverters 8 installed on the respective unit chambers 4; guide ducts 9 which are installed on the top of the unit chamber 4 and guides hot air from the inverter 8 to the aggregated duct 6; and a suction fan 11 which is installed on the outlet side of the aggregated duct 6 so as to exhaust collected hot air at the aggregated duct 6 to the outside of the box body 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
