Patent ID: 8393048
Filing Date: 2013-03-12
Classification: B01D

Abstract:
1. Suction device for cleaning purposes, comprising: a dirt collection container, which comprises a suction inlet, a first filter arranged at a first suction outlet, a second filter arranged at a second suction outlet, a first suction line and a second suction line, respectively following the first filter and the second filter, via which the dirt collection container can be subjected to negative pressure, a first external air inlet and a second external air inlet which allow external air to flow into the first suction line and into the second suction line, respectively, in order to subject the first filter and the second filter, respectively, to external air on a clean space side of the filters, and a first closing valve and a second closing valve for closing the first external air inlet and the second external air inlet, respectively, a first suction unit for subjecting the dirt collection container to the negative pressure via the first suction line and the first filter, and a second suction unit for subjecting the dirt collection container to the negative pressure via the second suction line and the second filter, and wherein: