A dust remover for a vacuum cleaner is provided inside a filter and is rotated by a motor. The dust remover includes: a rigid rotary member perpendicularly coupled to an output shaft of the motor to be rotated according to a rotation of the output shaft; a rotating buffer member assembled with an end portion of the rigid rotary member to be rotatable around a rotary shaft that is in parallel with the output shaft; a striking member having an end portion fixed to the rotating buffer member and another end portion contacting the filter; and an elastic member having an end portion coupled to the rotating buffer member and another end portion coupled to the rigid rotary member so as to apply an elastic recovery force to the rotating buffer member to rotate in a direction in which the rigid rotary member rotates.

The invention discloses a dust detection method and system and a signal processing unit thereof to detect the dust in the net gas output by different gas-solid separation units. The method according to the invention comprises a signal acquisition section acquiring the target signal with the dust detection components arranged at the net gas output sides of different gas-solid separation units, a signal transmission section transmitting the target signal acquired by the signal acquisition section, and a signal processing section receiving and processing the target signal transmitted by the signal transmission section and outputting the detection results; the dust detection components of the signal acquisition section are arranged on the confluence channel that is connected with the net gas output sides of the different gas-solid separation units, and are respectively arranged behind the connection points on the confluence channel for connecting with the net gas output sides of the different gas-solid separation units.

The invention discloses a dust detection method and system and a signal processing unit thereof to detect the dust in the net gas output by different gas-solid separation units. The method according to the invention comprises a signal acquisition section acquiring the target signal with the dust detection components arranged at the net gas output sides of different gas-solid separation units, a signal transmission section transmitting the target signal acquired by the signal acquisition section, and a signal processing section receiving and processing the target signal transmitted by the signal transmission section and outputting the detection results; the dust detection components of the signal acquisition section are arranged on the confluence channel that is connected with the net gas output sides of the different gas-solid separation units, and are respectively arranged behind the connection points on the confluence channel for connecting with the net gas output sides of the different gas-solid separation units.

The present invention concerns an air filter cleaning device having a rotating stage on which an air filter to be cleaned is seated and rotated about its central axis; and an inner outlet head configured to extend through a central opening of the rotating stage and be vertically moveable between a lower position and an upper position at least parallel to the central axis of the air filter, said outlet head having at least one gas outlet for discharging pressurized air outwardly through at least one wall of the air filter for dislodging contaminants; an outer vacuum head located externally to the air filter for suctioning the contaminants dislodged from the air filter by the inner outlet head wherein the inner outlet head is further configured such that the lower position is located less than about 1,500 mm above a support surface for the cleaning device.

The present invention concerns an air filter cleaning device having a rotating stage on which an air filter to be cleaned is seated and rotated about its central axis; and an inner outlet head configured to extend through a central opening of the rotating stage and be vertically moveable between a lower position and an upper position at least parallel to the central axis of the air filter, said outlet head having at least one gas outlet for discharging pressurized air outwardly through at least one wall of the air filter for dislodging contaminants; an outer vacuum head located externally to the air filter for suctioning the contaminants dislodged from the air filter by the inner outlet head wherein the inner outlet head is further configured such that the lower position is located less than about 1,500 mm above a support surface for the cleaning device.

The invention relates to a filter arrangement comprising a filter cartridge, having an opening and a wall which is formed by a filter medium and has an inner side delimiting a clean side of the filter and an outer side delimiting a raw side of the filter, a fan for conveying air to be purified first through the wall and subsequently through the opening of the filter cartridge, and a purification device, which is configured to convey a jet of compressed air through the opening into the filter cartridge and through the out of the filter cartridge, for conveying dirt away from an outer wall of the wall. The invention also relates to a method for detecting a leak of a filter cartridge, wherein the filter cartridge has an opening and a wall which is formed by a filter medium and has an inner side delimiting a clean side of the filter and an outer side delimiting a raw side of the filter.

A mobile earth working machine (10), for example a road milling machine, recycler, or surface miner, includes: a working apparatus (12) for material-removing working of a region of a substrate (U); and an extraction device (40) that is embodied to extract dust-laden air from at least one machine region at at least one extraction location (46), and to exhaust extracted air at a discharge location (50) different from the extraction location (46),
the extraction device (40) comprising a filter apparatus (42) arranged along an operational flow path from the at least one extraction location (46) to the discharge location (50), the filter apparatus (42) encompassing: a filter housing (54); a filter element (52) received in the filter housing (54), the filter element (52) being embodied to remove dust particles from the air flowing through the filter apparatus (42). The filter apparatus (42) comprises a deformation actuator arrangement (44, 76a) that interacts force-transferringly with at least one wall (86) of the filter housing (54) in such a way that by actuation of the deformation actuator arrangement (44, 76a), the at least one wall (86) of the filter housing (54) is deformable orthogonally to its wall surface.

A mobile earth working machine (10), for example a road milling machine, recycler, or surface miner, includes: a working apparatus (12) for material-removing working of a region of a substrate (U); and an extraction device (40) that is embodied to extract dust-laden air from at least one machine region at at least one extraction location (46), and to exhaust extracted air at a discharge location (50) different from the extraction location (46),
the extraction device (40) comprising a filter apparatus (42) arranged along an operational flow path from the at least one extraction location (46) to the discharge location (50), the filter apparatus (42) encompassing: a filter housing (54); a filter element (52) received in the filter housing (54), the filter element (52) being embodied to remove dust particles from the air flowing through the filter apparatus (42). The filter apparatus (42) comprises a deformation actuator arrangement (44, 76a) that interacts force-transferringly with at least one wall (86) of the filter housing (54) in such a way that by actuation of the deformation actuator arrangement (44, 76a), the at least one wall (86) of the filter housing (54) is deformable orthogonally to its wall surface.

The invention relates to a relief valve (100) for portable, industrial dust collectors. It has actuating means (102, 104) for actuating the valve (100) between a closed position and an open position. According to the invention, the valve further includes retaining means (107) for maintaining the valve in the open position. The invention also relates to a hose device for a cleaner of a dust collector a dust collector. The hose device is arranged such that it covers the bottom of the grid means in the cleaner when the dust collector operates and falls down when the vacuum in the dust collector is released. The invention further relates to a cleaner, to a dust collector, to a grinding machine and to a method for operating a dust collector. These are in conjunction with the relief valve and/or the hose device. The invention also relates to a dust collector with cleaner means (1, 2), a relief valve (100, 400) and an inlet valve (12) and synchronization means arranged to govern that the actuation of the inlet valve (100, 400) is synchronized with actuation of the relief valve (12).

A method of filtering indoor air pollution for filtering air pollutant in an indoor space is disclosed. A plurality of gas processing devices is provided for detecting and filtering air pollutant, and transmitting device inner gas detection data. A connection device is provided for receiving and transmitting the device inner gas detection data to a cloud processing device. The cloud processing device intelligently compares and selects to drive a closest gas processing device to filter the air pollutant and drive the gas processing devices to determine a convection path and generate at least one airflow . The airflow accelerates the movement of the air pollutant along the convection path to move the air pollutant towards the closest processing device adjacent to the air pollutant for filtering, so that the air pollutant in the indoor space can be filtered rapidly to obtain a clean, safe and breathable air condition.