Oscillating suction improves air filter medium cleaning

摘要

The used medium (12) is vacuum cleaned, and is deflected by varying the suction pressure. The suction pulsates, and the max. and min. amplitudes may be pre-set. The amplitudes vary over a working interval. The pressure variation over unit time is preselectable, or may be continuously adjusted. The frequency may be selected, and it too, may be varied over a working interval. In addition to the method described above, suitable appts. is also claimed.