| 摘要 |
A road-cleaning vehicle has a pneumatic pickup head held against the road surface for collecting rubbish therefrom as a current of air is supplied from a blower. Carrying the collected rubbish, the air flows from the pickup head to a rubbish hopper in which the rubbish is deposited. Rid of the rubbish but still laden with dust particles, the air flows from the rubbish hopper to an air-dust separation chamber having a generally cylindrical shape, in which the dust is centrifugally separated from the carrier air as the latter spirals toward the blower. The air-dust separation chamber has a dust outlet open to an entrance end of a dust collection vessel generally sloping downwardly as it extends away from the air-dust separation chamber and terminating at an exit end open to the rubbish hopper. Hingedly mounted to the exit end of the dust collection vessel is a door which, during the rotation of the blower, is closed against the exit end by virtue of a partial vacuum created in the vessel, until the weight of the separated dust on the door overcomes the suction being exerted thereon. Preferably, the dust particles are sprayed with water before being admitted into the air-dust separation chamber.
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