Alfred Kärcher Se Co. Kg

Dominik Scholl

Florian Ebert

Felix Bensing

Gábor Peflof

Simon Jetter

Andreas Neu

A cleaning apparatus is provided, including at least one noise source and an air guidance device having at least one flow deflection element, wherein the at least one flow deflection element has a first duct arm and a second duct arm, wherein the second duct arm is oriented transversely to the first duct arm, and wherein, during operation of the cleaning apparatus, there is sound propagation from the first duct arm to the second duct arm, wherein a mode filter device for transverse modes of sound propagation is arranged at the at least one flow deflection element, having at least one mode filter that is positioned at the second duct arm.

Cleaning apparatus with flow deflection element with mode filter

A cleaning apparatus is provided, including at least one noise source, and an air guidance device having at least one flow deflection element, wherein the at least one flow deflection element has a first duct arm with a first opening and a second duct arm with a second opening, and wherein the second duct arm is oriented transversely to the first duct arm, wherein a ratio of a first width of the first opening to a second width of the second opening is greater than 1.

Cleaning apparatus

A cleaning apparatus is provided, including at least one noise source and an air guidance device having at least one flow deflection element, wherein the at least one flow deflection element has a first duct arm and a second duct arm, wherein the second duct arm is oriented transversely to the first duct arm, and wherein the first duct arm and the second duct arm have a common edge at an external corner region, characterized in that arranged in an interior of the at least one flow deflection element is a built-in wall which covers the edge in the interior, in that the built-in wall faces a through-flow region in the interior, and in that the built-in wall takes a form such that it guides flow and is sound-permeable.

Cleaning apparatus with flow deflection element with built-in wall

A suction unit is proposed which comprises a suction apparatus, a dirt collection container, a filter device, wherein the dirt collection container is connected in terms of flow via the filter device to the suction apparatus, and a cleaning device for the filter device, wherein the cleaning device forms a noise source for noise emissions in a frequency range below 2000 Hz, and wherein at least one perforated-plate resonator is associated with the cleaning device, wherein the at least one perforated-plate resonator has a chamber with a chamber space and with a chamber wall and has at least one perforated plate which covers the chamber space, and wherein the at least one perforated plate is connected, actively with respect to sound, to the cleaning device.

Growing community of inventors

Winnenden, Germany

Dominik Scholl