Nilfisk-advance A/s

Wap Reinigungssystems Gmbh & Co.

Klaus Dietz

Rainer Hafenrichter

Martin Kienzle

Günther Werbach

G&uuml;nther Werbach

Silke Meyer

The invention relates to filter cleaning in a vacuum having a switchable flap element, the cleaning of the filter or of parts of the filter being carried out by supplying a secondary air flow to the interior of the filter to be cleaned, and air being able to flow through the filters separately from each other from the outside to the inside in the vacuum container in a sealed manner, and a flap element disposed in a chamber housing being pivotable, by means of the pivoting of which openings may be closed and released, the secondary air flow reaching the surface of the filter to be cleaned from the inside toward the outside in pulses, characterized in that the flap element comprises at least two partial flaps, the pivoting of which is actuated by a pivot drive, the respective partial flap optionally closes the outflow opening of the respective filter chamber in the direction of the intake opening of the suction turbine, the blow-out side of the suction turbine delivers the created overpressure air into an overpressure chamber in which a chamber housing is disposed, the at least one drive element to be suddenly actuated comprises openings to be opened and closed, upon the opening of which the overpressure air flows through the chamber housing optionally into an impulse channel which branches off at that location and introduces the air into one or into the other filter chamber for cleaning.

Filter cleaning in a vacuum having a flap element

The invention relates to a filter dedusting arrangement in a vacuum cleaner, wherein dedusting of the filter or filter-parts is effected by supplying a secondary airflow, in a known manner. The distinctive feature of the invention is that the secondary airflow through the filter for dedusting is controlled so that by utilizing differences in pressure a flap element arranged in a casing abruptly changes its position and opens and/or closes one or more openings in the casing so that the secondary airflow impinges impulsively on the surface of the filter to be dedusted. The impulsive supply of secondary air to the filter produces a much better cleaning action.

Filter dedusting arrangement in a vacuum cleaner

Growing community of inventors

Ulm, Germany

Klaus Dietz