Vacuum cleaner in which exhaust air filter is connected after dust filter bag

摘要

A fan chamber (2) contains a fan and its electric driving motor. The exhaust air filter (7) or a filter intermediate layer assigned to this is provided with a moisture absorbent for moisture reception. The sealing material is saturated through the pores of the filter or the filter intermediate layer of sealing material. This material with the reception of moisture experiences a colour alteration.