Suction device comprises filling level detection unit, which has capacitive sensor with electrically chargeable measuring electrode assigned to dirt collecting chamber, and evaluation unit for determining filling level of dirt substances

摘要

The suction device (10) comprises a suction housing (11), in which a suction motor (19) and a dirt collecting chamber (15) are arranged. A filling level detection unit (40) is provided, which has a capacitive sensor (42) with an electrically chargeable measuring electrode (47) assigned to the dirt collecting chamber. An electrical capacitance of the capacitive sensor is variable by the dirt substances in the dirt collecting chamber. The filling level detection unit comprises an evaluation unit for determining filling level of the dirt substances (S) depending on the electrical capacitance.