A floor maintenance machine may include a hollow hood that can be utilized as part of an exhaust pathway and support secondary filtration elements. This hood can be used in conjunction with debris collection from the floor using one or more brooms and/or a vacuum such as a novel integrated vacuum formed on an exterior surface of the hollow hood.

A cleaner head for a surface cleaning apparatus, including: a first agitator rotatable about a first axis; a second agitator rotatable about a second axis; a housing movable along a surface to be cleaned; wherein the housing at least partially defines a chamber which at least partially surrounds the first and second agitators, wherein said chamber includes: a dirty air inlet; a dirty air outlet; and an opening for permitting access to and removal of the first and/or second agitators from the chamber; the cleaner head further including a cover cooperatively associated with the housing for permitting access to the chamber through the opening; wherein the cover is movable to an agitator access position to permit the first and/or second agitator to be removed from the chamber through the opening in a direction substantially orthogonal to the first and/or second axis of the respective first and/or second agitator and in a direction which is substantially parallel to a plane of the surface to be cleaned.

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.

A base station includes a base station housing provided with a dust collection port; and a dust collection assembly including a dust collection apparatus, and a dust bag compartment, a noise reduction housing, a dust collection duct and a dust collection fan arranged in the base station housing. The dust collection apparatus is arranged in the dust bag compartment, the noise reduction housing is provided with an air exhaust port, the dust collection duct communicates the dust collection port, the dust bag compartment and the noise reduction housing to form a dust collection air duct, the dust collection fan is arranged on the dust collection air duct to generate a dust collection airflow, and after the dust collection airflow brings debris in a self-moving cleaning device into the dust collection apparatus through the dust collection port, the dust collection airflow is exhausted from the air exhaust port.

The present disclosure describes a ground cleaning device that comprises a ground brush, a main body, and a fan. The fan may be located inside the main body and may comprise an air inlet and an air outlet. The main body may comprise a main air outlet channel, a front air outlet channel, and a rear air outlet channel. One end of the main air outlet channel may be connected to a switching device, which has a first state and a second state. Based on the switching device being in the first state, the switching device may close the rear air outlet channel to disconnect the main air outlet channel from the rear air outlet channel. Based on the switching device being in the second state, the switching device may open the rear air outlet channel to connect the main air outlet channel to the rear air outlet channel.