Vacuum cleaner for cleaning floor surface, has dust flow display device provided with electro-active polymer portion that is controlled with control signal generated based on dust sensor signal, during operation of vacuum cleaner

摘要

The vacuum cleaner (10) has a dust sensor for detecting the amount of absorbed dirt particle. A holding element (14) is provided with a dust flow display device for generating a haptic perceptible signal. An electro-active polymer portion of the dust flow display device is controlled with a control signal which is generated corresponding to the dust sensor output signal, during operation of vacuum cleaner portion.