| 摘要 |
PROBLEM TO BE SOLVED: To reduce excessive electric power by changing stably and smoothly the electric power in accordance with the suction air volume and ensuring suction power by air volume-electric power characteristics in accordance with the state of a suction fixture. SOLUTION: A microcomputer 15 as the determining means switches a preset first phase-current determining value characteristic, a second phase-current determining value characteristic, and a third phase-current determining value characteristic in accordance with the state of the suction fixture that is detected by a connection detecting section 18 and controls supplied electricity of an electric air blower 2 by a phase control. COPYRIGHT: (C)2009,JPO&INPIT
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