| 摘要 |
<p>The pressure side ductwork can be connected with that of the suction side, so at least some of the conveying airflow in the pressure side, is supplied to the suction side. The suction side (21) of the blower (20) is connected to an inlet through which the conveying air is drawn in from the surroundings during operation of the blower. The pressure side of the blower is connected to an outlet through which conveying air is delivered to the surroundings during operation. The connecting section includes a flap valve, allowing the returned airflow to be varied. An independent claim is included for the corresponding method.</p> |
