VORRICHTUNG ZUR LUFTFILTERUNG.

摘要

Filter comprises a fan to draw air through a filter element, and a source of pressurised air to provide an element cleaning blast oriented parallel to and closely adjacent to a section of the element to remove collected material in the parallel direction and to discharge it remotely from the element. The relative positions of element and blast are varied so that other sections are successively exposed to the blast. Either the element or the blast nozzle may be held stationary while the other is moved. A blanking member is pref. moved over the opposite side of the element to prevent air flow through the element and is moved to successive sections as these are exposed to the blast.