An upright two-stage dust collector includes a base unit, a suction blower unit, a filter unit and a dust collecting unit. The suction blower unit has a suction blower body. The filter unit includes a filter body, a coarse particle dust filter cartridge disposed in the filter body, and a fine particle dust filter element disposed in the coarse particle dust filter cartridge. The fine particle dust filter element is coaxially inserted in the coarse particle dust filter cartridge. The air after the first dust collection is filtered by the fine particle dust filter element to perform the second dust collection. Through the combination of the above units, in addition to a two-stage dust collecting effect, the dust collector occupies less space and can be used conveniently.

An air purifier having a polygonal casing defining one or more inside corners, a cylindrical air filter extending along a center axis within the polygonal casing with a space formed between a radially outwards facing surface of the filter and at least one of the one or more the inside corners of the casing, and a filter cleaner at least partly located in the space. The filter cleaning has a cleaning member, a gear mechanism, at least one UV light source, a motor configured to drive the gear mechanism to thereby drive the radially outwards facing surface of a cylindrical air filter past the cleaning member and the at least one UV light source, and a filter cleaner housing encasing the motor, the cleaning member and the gear mechanism.

An air purifier having a polygonal casing defining one or more inside corners, a cylindrical air filter extending along a center axis within the polygonal casing with a space formed between a radially outwards facing surface of the filter and at least one of the one or more the inside corners of the casing, and a filter cleaner at least partly located in the space. The filter cleaning has a cleaning member, a gear mechanism, at least one UV light source, a motor configured to drive the gear mechanism to thereby drive the radially outwards facing surface of a cylindrical air filter past the cleaning member and the at least one UV light source, and a filter cleaner housing encasing the motor, the cleaning member and the gear mechanism.

The present invention relates to a withdrawal plate suitable for an apparatus for withdrawing a sprayed paint to solve a failure of a painting facility and a contamination problem due to paint sludge, which includes: a square frame constituted by left and right side frames 91, an upper frame 92, and a base frame 93; and slats 94 arranged at a predetermined interval within the square frame, in which the left and right side frames 91 facing each other are included in one direction, and the slat 94 is fixed the left and right side frames 91 in an oblique state so that a front is lifted up and moves down backwards when viewed from the side, and multiple slats are consecutively arranged at a predetermined interval in a vertical direction.

A filter cleaning device for an air conditioner includes: a casing; a filter that is disposed in the casing and through which an air flow passes; a cleaning brush that is contactable with the filter surface and removes particulate matter from the filter surface; and a dust box that receives the particulate matter, and includes a housing accommodating the cleaning brush and having an opening through which the cleaning brush protrudes to contact a filter surface, a suction tool that includes an outlet in the housing to communicate with the dust box, and applies a suction force to the dust box to remove the particulate matter from the dust box; and a lid that is movable between first and second positions, and closes the opening of the housing in the second position when the suction force is applied.

A combustion air filtration apparatus for filtering combustion air for an engine is disclosed. The combustion air filtration apparatus comprises a combustion air source and a filter system fluidly coupled to the combustion air source and to the engine to receive combustion air from the combustion air source and to supply filtered combustion air for the engine. The filter system comprises a first combustion air filter, a second combustion air filter flow-parallel to the first combustion air filter, and a flow control system fluidly coupled to the first combustion air filter and the second combustion air filter to direct flow of combustion air selectively between the first combustion air filter and the second combustion air filter.

A cleanable filtration system for an air conditioning system includes a continuous filter positionable adjacent to an inlet opening in the air conditioning system and a drive system operably coupled to the continuous filter to move the continuous filter relative to the inlet opening. A cleaning jet is positioned to spray a cleaning fluid on an adjacent portion of the continuous filter.

A cleanable filtration system for an air conditioning system includes a continuous filter positionable adjacent to an inlet opening in the air conditioning system and a drive system operably coupled to the continuous filter to move the continuous filter relative to the inlet opening. A cleaning jet is positioned to spray a cleaning fluid on an adjacent portion of the continuous filter.

The present invention discloses a self-propelled cleaning machine of which a control module controls a driving device to prompt a dust compressing member mounted in a dust box to be at a compressing position or a non-compressing position. The dust compressing member of the self-propelled cleaning machine is capable of compressing trash in the dust box to keep the compressed trash within a specific space inside the dust box, thereby achieving an effect of reducing the number of times that a user has to clear the dust box.

The present invention discloses a self-propelled cleaning machine of which a control module controls a driving device to prompt a dust compressing member mounted in a dust box to be at a compressing position or a non-compressing position. The dust compressing member of the self-propelled cleaning machine is capable of compressing trash in the dust box to keep the compressed trash within a specific space inside the dust box, thereby achieving an effect of reducing the number of times that a user has to clear the dust box.