A method for influencing the device-typical sound emission of a cleaning device, wherein the cleaning device has a device housing and a cleaning mechanism for carrying out a cleaning activity on a surface to be cleaned, wherein the cleaning device emits device-typical sound while carrying out the cleaning activity, and wherein the device-typical sound is detected and analyzed with respect to at least one sound frequency contained therein. In order to adapt the soundscape of the cleaning device in such a way that a user can ascertain a proper functionality of the cleaning device, a displaceable section assigned to a flow channel of the cleaning device is displaced relative to the flow channel and/or the device housing in dependence on the analysis result until a characteristic sound frequency for the cleaning activity emitted by the cleaning mechanism has a defined amplitude.

A method for controlling a suction device, in which the suction device includes at least one electric motor at least for generating a suction function, includes at least detecting vibration data on a suction hose of the suction device, evaluating the vibration data by comparing it with comparison data and generating a comparison result, and controlling the electric motor in accordance with the comparison result.

A household appliance has a device housing, a blower arranged in the device housing, an outlet opening formed in a direction of flow behind the blower in the device housing, a flow channel that connects the outlet opening with the blower in terms of flow, and a sound attenuator allocated to the flow channel for attenuating sound arising from the operation of the household appliance. The sound attenuator has sound-absorbing wall elements that have a wall surface that is curved in relation to a direction of a longitudinal extension of the flow channel, a support body for receiving the sound-absorbing wall elements, and a sound-reducing wall with a wall plane oriented parallel to the flow path. The sound attenuator is modular in design, formed of the support body, wall elements and sound-reducing wall, and is installed as a whole into the device housing between the blower and outlet opening.

An upright vacuum cleaner has a handle by which it can be manoeuvred across a floor in a floor cleaning mode, the handle being part of a releasable suction wand which can be used in an above-floor cleaning mode. The suction wand has a first section which comprises the handle, a second section, and a third section which comprises a suction nozzle. The first section is movable relative to the second section between floor cleaning and above-floor cleaning positions. The third section is extendable and retractable relative to the second section. The suction wand has a linkage which is configured to couple movement of the first section towards one of said positions, and extension or retraction of the third section.

The invention relates to a floor vacuum cleaner comprising a dust collector arrangement mounted on rollers and/or runners, a suction hose, a suction tube, and a floor nozzle, wherein the floor nozzle is fluidically connected to the dust collector arrangement via the suction tube and the suction hose, wherein the dust collector arrangement comprises a dust separator, wherein the dust collector arrangement comprises a motorized fan unit for suctioning an air stream through the floor nozzle, wherein the motorized fan unit is arranged so that an air stream suctioned in through the floor nozzle, the suction tube, and the suction hose flows through the motorized fan unit and into the dust separator, wherein the dust collector arrangement has a housing and the motorized fan unit is mounted on or in the housing, wherein the dust separator is mounted in the housing.

An extension pipe (30) is configured to allow a suction tool (70) to be connected to one end side in a pipe axis direction and a vacuum cleaner main body (10) to be connected to another end. The extension pipe (30) includes a power-receiving portion (36) configured to receive and supply electric power to be fed to a battery (17a) provided to the vacuum cleaner main body (10).

Disclosed is a central vacuum system. The central vacuum system comprises a first vacuum device, a second vacuum device, and a hose connected between the first vacuum device and the second vacuum device; the first vacuum device and the second vacuum are controlled by a linked switch, interior of the hose remains positive or slightly negative pressure. A self-operated differential pressure regulating valve arranged at the end of the hose is capable of generating corresponding air resistance under different airflow rate so as to maintain the interior pressure of the hose at a stable slightly positive or negative pressure.

A vacuum cleaner includes an upright handle assembly, a foot assembly adapted to be moved along a surface to be cleaned and having a suction nozzle, a multi-axis joint swivelably mounting the upright handle assembly to the foot assembly and defining a first axis about which the upright handle assembly twists relative to the foot assembly and a second axis about which the upright handle assembly pivot relative to the foot assembly, and a detachable vacuum module supported on the upright handle assembly by the module platform.

A reconfigurable upright vacuum cleaner has a portable surface cleaning unit removably mounted to an upper portion. The portable surface cleaning unit has a suction motor and an air treatment member. The air treatment member is removably mounted to the portable surface cleaning unit and secured in position by an air treatment member lock. The portable surface cleaning unit is secured in position by a portable surface cleaning unit lock. When the portable surface cleaning unit is mounted to the upper portion and the upper portion is in the storage position, the portable surface cleaning unit actuator is provided on an upper end of the portable surface cleaning unit and the air treatment member release actuator is provided on an upper end of the air treatment member.