Vacuum cleaner, and a method for evaluating a particles signal in a vacuum cleaner

摘要

A method for evaluating a particles signal (u (t)) in a vacuum cleaner (1) is driven by an electric motor with a suction fan (8) and / or with a suction unit (16), which an electric motor driven bristle roller (18), with at least one control device (24) for influencing the rotational speed (n) or power of the suction blower (8) and / or of the bristle roller (18) and with a sensor (21) for the production of the particles signal (u (t)), which has at least of the number of the drawn-in dust particles is dependent on, wherein said control means (24) of the speed or power of the suction blower (8) and / or of the bristle roller (18) as a function of the means of an evaluation circuit (22) processed particulate signal (u (t)) is influenced, characterized in that the control device (24) the sensitivity (e) of the evaluation circuit (22) as a function of the rotational speed (n) or of the power of the suction blower (8) and / or of the bristle roller (18), of the control device (24) output switching signals (25, 26) for the blower motor (15) and / or the brush motor (17) on the evaluation circuit (22) are fed back, which then threshold values for the sensitivity (e) changes.