| 摘要 |
PURPOSE:To secure the most suitable air volume required and save power required for an exhauster by controlling the number of revolutions in accordance with the dust density at the inlet of a dust collector. CONSTITUTION:A dust densitometer sensor 6 is installed on the inlet side of a dust collector 3. The number of revolutions of an exhauster 4 of the dust collector is controlled by a control device 8 controlling the number of revolutions. The most suitable number of revolutions corresponding to the dust density can be set by putting a dust density signal S1 issued from the sensor 6 and an operation signal S3 issued from an electric room 11 into a controller 10 for setting the most suitable volume of air. Accordingly, the most suitable air volume required can be secured and power required for the exhauster can be saved by controlling the number of revolutions of the exhauster in accordance with the dust density.
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