A surface cleaning apparatus comprises an air treatment chamber having a porous member at the air outlet. The air treatment chamber has a stationary portion and an openable portion, the openable portion is moveably mounted by a mount between a closed position in which the air treatment chamber is closed and an open position in which the air treatment chamber is open. The porous member is moveable concurrently with the openable portion. When the openable portion is in the closed position, the openable portion and the stationery portion abut along peripheral edges that extend along a length of the air treatment chamber sidewall.

A dust collection box for a dust extractor includes first and second air inlet chambers, an air inlet aperture through which air is drawn into the first air inlet chamber, an air outlet aperture through which air is dawn out of the second air outlet chamber, an air intermediate chamber formed in the housing, and a filter mounted within the housing. The filter includes a first part through which air passes from the air inlet chamber to the air outlet chamber, and a second part through which air passes from the air inlet chamber to the air intermediate chamber. An ambient air aperture is formed in the wall of the housing. A valve disposed proximate the ambient air aperture is switchable to connect the air intermediate chamber to only one of the air outlet chamber or the ambient air aperture.

A dust collection box for a dust extractor includes first and second air inlet chambers, an air inlet aperture through which air is drawn into the first air inlet chamber, an air outlet aperture through which air is dawn out of the second air outlet chamber, an air intermediate chamber formed in the housing, and a filter mounted within the housing. The filter includes a first part through which air passes from the air inlet chamber to the air outlet chamber, and a second part through which air passes from the air inlet chamber to the air intermediate chamber. An ambient air aperture is formed in the wall of the housing. A valve disposed proximate the ambient air aperture is switchable to connect the air intermediate chamber to only one of the air outlet chamber or the ambient air aperture.

A cleaning device includes: a vacuum cleaner including a dust collecting container; and a dust collecting station connectible to the dust collecting container to receive the foreign substances collected in the dust collecting container The dust collecting container includes a dust collecting container main body including a first opening and a dust collecting container door configured to open or close the first opening by rotating around a first axis. The dust collecting station includes: a station main body including an accommodation space, a capturing portion including a second opening to intercommunicate with the first opening, and configured to capture the foreign substances, and a pressurizer configured to rotate around a second axis to apply pressure on one side of the dust collecting container door so that the dust collecting container door rotates around the first axis to be adjacent to the dust collecting container main body.

A method for operating a vacuum cleaning appliance, having a filter element, a filter element cleaning device, a control device, a turbine, a first pressure sensor and a second pressure sensor. The method includes operating the vacuum cleaning appliance to suck in the air stream through the filter element; determining a first pressure reference value; measuring the pressure difference between the first and second pressure values; dedusting the filter element with the aid of the filter element cleaning device if the value of the pressure difference between the first and second pressure values reaches a first threshold value; determining a second pressure reference value after the end of the dedusting of the filter element; determining a difference value between the second and first pressure reference values; and dedusting the filter element if the difference value between the second and first pressure reference values reaches a second threshold value, or switching off the vacuum cleaning appliance if the difference value between the second and first pressure reference values reaches a third threshold value. A vacuum cleaning appliance for carrying out the method.

A method for operating a vacuum cleaning appliance, having a filter element, a filter element cleaning device, a control device, a turbine, a first pressure sensor and a second pressure sensor. The method includes operating the vacuum cleaning appliance to suck in the air stream through the filter element; determining a first pressure reference value; measuring the pressure difference between the first and second pressure values; dedusting the filter element with the aid of the filter element cleaning device if the value of the pressure difference between the first and second pressure values reaches a first threshold value; determining a second pressure reference value after the end of the dedusting of the filter element; determining a difference value between the second and first pressure reference values; and dedusting the filter element if the difference value between the second and first pressure reference values reaches a second threshold value, or switching off the vacuum cleaning appliance if the difference value between the second and first pressure reference values reaches a third threshold value. A vacuum cleaning appliance for carrying out the method.

This document discloses a valve comprising a main valve closure body, arranged on a low pressure side of the valve and moveable to open towards the low pressure side, a control body, fixedly connected to the main valve closure body, such that a position of the main valve closure body is fixed relative to a position of the control body, a control chamber, partially defined by the control body, whereby a volume of the control chamber is variable in relation to the position of the control body, and a control fluid connector for controlling a pressure in the control chamber. The document also discloses use of the valve in a separator for separating dust and debris from an airflow, a separator comprising such a valve and a method of operating a separator.

This document discloses a valve comprising a main valve closure body, arranged on a low pressure side of the valve and moveable to open towards the low pressure side, a control body, fixedly connected to the main valve closure body, such that a position of the main valve closure body is fixed relative to a position of the control body, a control chamber, partially defined by the control body, whereby a volume of the control chamber is variable in relation to the position of the control body, and a control fluid connector for controlling a pressure in the control chamber. The document also discloses use of the valve in a separator for separating dust and debris from an airflow, a separator comprising such a valve and a method of operating a separator.

A cleaner is disclosed. The cleaner may include a housing having an opening through which air is introduced into the housing. The cleaner may also include a filtering unit mounted in the inner space of the housing. The filtering unit may define a dust collection space between the filtering unit and the inner surface of the housing. In addition, the cleaning unit may be mounted to surround the filtering unit. A manipulation unit may raise or lower the cleaning unit within the dust collection space. Furthermore, brush protrusions may protrude from the cleaning unit toward the surface of the filtering unit.

A cleaner is disclosed. The cleaner may include a housing having an opening through which air is introduced into the housing. The cleaner may also include a filtering unit mounted in the inner space of the housing. The filtering unit may define a dust collection space between the filtering unit and the inner surface of the housing. In addition, the cleaning unit may be mounted to surround the filtering unit. A manipulation unit may raise or lower the cleaning unit within the dust collection space. Furthermore, brush protrusions may protrude from the cleaning unit toward the surface of the filtering unit.