A mobile vehicle mounted dry filtration system to support a grinder system used for removal of markings, creating rumble strips, or the like. Blowers create a vacuum for drawing debris and dust from the grinder system into a debris bin. Large debris is removed from the vacuum draw and remains in the bin for later disposal. Small particles and dust are drawn into parallel positioned filter cyclones that have a cyclonic separation followed by flexible and inexpensive bag filters. The flexible filters are cleaned using vibrating diaphragms mounted on the top of the filter cyclones subject to a reverse air flow by the blowers using slide valves. A polishing tank containing water receives the exhaust from the filter cyclones for removal of airborne particles and sound suppression.

A de-dusting unit positionable in a vacuum chamber of a vacuuming device, where the vacuum chamber is delimited by a turbine, a first filter, and a second filter. The de-dusting unit includes a displacement module where the de-dusting unit is positionable within the vacuum chamber by the displacement module such that one of the first and second filters at a time is isolated from a suction flow and such that an oscillating movement of the de-dusting unit is transmitted to the isolated filter.

A de-dusting unit positionable in a vacuum chamber of a vacuuming device, where the vacuum chamber is delimited by a turbine, a first filter, and a second filter. The de-dusting unit includes a displacement module where the de-dusting unit is positionable within the vacuum chamber by the displacement module such that one of the first and second filters at a time is isolated from a suction flow and such that an oscillating movement of the de-dusting unit is transmitted to the isolated filter.

In accordance with the present disclosure a modular air treatment system is disclosed. The modular air treatment system includes a fan apparatus having a base to removably couple to at least one of an air filter and/or a humidifier, wherein the fan apparatus includes a fan body with at least one convex surface and a nozzle to output air along the at least one convex surface.

In accordance with the present disclosure a modular air treatment system is disclosed. The modular air treatment system includes a fan apparatus having a base to removably couple to at least one of an air filter and/or a humidifier, wherein the fan apparatus includes a fan body with at least one convex surface and a nozzle to output air along the at least one convex surface.

An electric vacuum cleaning apparatus includes a station and an electric vacuum cleaner connectable/disconnectable from the station. The electric vacuum cleaner includes: a coarse-dust collecting chamber that accumulates coarse dust separated with a first separator; a filter chamber that accumulates fine dust separated with a filter; a coarse-dust waste-outlet that discharges the coarse dust from the coarse-dust collecting chamber; a fine-dust waste-outlet adjacent to the coarse-dust waste-outlet and discharges the fine dust from the filter chamber; and a waste-outlet lid that opens/closes both the coarse-dust waste-outlet and fine-dust waste-outlet together. The station includes: a secondary dust container accumulating coarse dust to be discharged from a primary dust container through the coarse-dust waste-outlet port and fine dust to be discharged from the primary dust container through the fine-dust waste-outlet; and a secondary electromotive blower that applies negative pressure to the primary dust container to transfer the coarse and fine dust.

Provided is a vacuum cleaner. The switching valve apparatus of the vacuum cleaner includes an outer casing and a counterflow air passage. The outer casing is provided with a first vent opening and a second vent opening arranged side by side along the circumferential direction of the outer casing. In the case where the counterflow air passage is at the first angular position, the outer casing seals the counterflow air outlet of the counterflow air passage; in the case where the counterflow air passage is at the second angular position, the counterflow air outlet communicates with the first vent opening and is staggered with the second vent opening; and in the case where the counterflow air passage is at the third angular position, the counterflow air outlet communicates with the second vent opening and is staggered with the first vent opening.

Provided is a vacuum cleaner. The switching valve apparatus of the vacuum cleaner includes an outer casing and a counterflow air passage. The outer casing is provided with a first vent opening and a second vent opening arranged side by side along the circumferential direction of the outer casing. In the case where the counterflow air passage is at the first angular position, the outer casing seals the counterflow air outlet of the counterflow air passage; in the case where the counterflow air passage is at the second angular position, the counterflow air outlet communicates with the first vent opening and is staggered with the second vent opening; and in the case where the counterflow air passage is at the third angular position, the counterflow air outlet communicates with the second vent opening and is staggered with the first vent opening.

A cleaner includes a housing including a suction opening, a cyclone part configured to separate air and dust, and a dust bin configured to store dust separated from air in the cyclone part and a frame disposed to surround an axis of a cyclone flow of the cyclone part in the housing and configured to be movable between a first position and a second position in the housing, wherein the frame includes a first body disposed to face the suction opening at the first position and disposed to be inclined with respect to the axis of the cyclone flow, and an upper end of the first body is located to be the same as or higher than an upper end of the suction opening.

A cleaner includes a housing including a suction opening, a cyclone part configured to separate air and dust, and a dust bin configured to store dust separated from air in the cyclone part and a frame disposed to surround an axis of a cyclone flow of the cyclone part in the housing and configured to be movable between a first position and a second position in the housing, wherein the frame includes a first body disposed to face the suction opening at the first position and disposed to be inclined with respect to the axis of the cyclone flow, and an upper end of the first body is located to be the same as or higher than an upper end of the suction opening.