Hoover Limited

Qunli Zhao

Alexander Anthony Denny Bassett

Xiaolong Bian

A cyclonic separation device comprises a cyclone chamberhaving a cyclone axis A, a fluid outlet at one end of the cyclone chamber and a tubular apertured shroudextending concentrically with the cyclone axis A. In use a motorrotates the shroudin the direction of a rotational airflow in the chamberat a rotational speed which is over 1500 rpm and/or over 70% of the airflow speed around the shroud. The high speed of rotation of the shroudis sufficient to dislodge any dust on the shroud by centrifugal action. Also, the high rotational speed of shroudmeans that the air does not to need to decelerate to pass through the shroudapertures and hence the risk of pressure drop and a loss of suction is avoided.

Cyclonic separation device

A cyclonic separation device comprises a plurality of cyclonic separators fluidly arranged in parallel with each other, each cyclonic separator comprising a chamberhaving a circular-section side walla fluid inletand a fluid outletdisposed at one end of the cyclone chamberand an opening at the second end of the cyclone chamberthrough which separated matter passes out of the chamber for collection. The cyclonic separators are arranged in a rotatable bodysuch that their respective cyclone axes B are outwardly inclined relative to an axis A of rotation of the bodyand such that the second end of each cyclone chamberis disposed radially outwardly of its first end with respect to the axis A of rotation. A motorrotates the bodyabout its axis A of rotation and so imparts a radially outward force on separated matter forced against the side wallby the cyclonic action, the radial force serving to rapidly force the matter axially of the towards the opening. The separation efficiency is thereby improved by the radial force.

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Suzhou, China

Qunli Zhao