Connection for the exhaust-air hose of a vacuum cleaner

摘要

The exhaust air from every vacuum cleaner contains, owing to design factors, fine dust which is so fine that it is forced through the filter pores together with the exhaust air. Conventional vacuum cleaners blow the exhaust air laden with fine dust back into the room again. This is intolerable, for example, for those allergic to dust. Central house vacuum-cleaner installations, which certainly avoid this problem, can be retroactively installed only at great expense. It is also possible to convey the exhaust air from the vacuum cleaner via an exhaust-air hose into the open air simply by hanging the hose out of a window or the like. However, this has disadvantages. For example, for vacuuming, the window must be opened and the hose is not adequately fixed. Connections for the exhaust-air hose to wall outlets installed in the outside wall or to a blowing-out pipe or blowing-out piece avoid these disadvantages. They make possible a discharge conduit for the vacuum cleaner exhaust air laden with very fine dust into the open air which is simple to produce and is firmly installed or fixed.