A cyclone separation device includes a cyclone chamber for separating dirt from incoming air, a dirt collecting chamber arranged adjacent to the cyclone chamber for collecting dirt particles separated from air, and a dirt duct between the cyclone chamber and the dirt collecting chamber for allowing dirt particles to exit the cyclone chamber into the dirt collecting chamber. To reduce the generation of noise-generating air vortices, the dirt duct has an edge protruding into a direction at an angle to the dirt duct at an exit ridge of the cyclone chamber that is first encountered by the air rotating in the cyclone chamber. Preferably, the edge is formed by a tangential extension of a wall of the cyclone chamber. A vacuum cleaner advantageously includes such a cyclone separation device.

A liquid treatment unit removes particulate matter and colloids from a liquid, as found in waste water on mines, on construction sites and on heavy industry sites. The liquid treatment unit includes an electrocoagulation unit and a cyclonic separator unit. The liquid to be treated is first subject to electrocoagulation and then fed into the cyclonic separator unit. The cyclonic separator unit guides the electrocoagulated liquid in a circular path downwardly from an outer perimeter to move underneath a skirt and then upwardly and inwardly towards a central outlet located at the top of the cyclonic separator. Floating particles are skimmed from the surface outside of the skirt. In moving to the outlet, the liquid passes through a plurality of nested frusto-conical guide members. An ultrasonic transducer is used to collapse bubbles formed by electrocoagulation, and to clean the electrocoagulation electrodes.

A liquid treatment unit removes particulate matter and colloids from a liquid, as found in waste water on mines, on construction sites and on heavy industry sites. The liquid treatment unit includes an electrocoagulation unit and a cyclonic separator unit. The liquid to be treated is first subject to electrocoagulation and then fed into the cyclonic separator unit. The cyclonic separator unit guides the electrocoagulated liquid in a circular path downwardly from an outer perimeter to move underneath a skirt and then upwardly and inwardly towards a central outlet located at the top of the cyclonic separator. Floating particles are skimmed from the surface outside of the skirt. In moving to the outlet, the liquid passes through a plurality of nested frusto-conical guide members. An ultrasonic transducer is used to collapse bubbles formed by electrocoagulation, and to clean the electrocoagulation electrodes.

A vacuum cyclonic separator that includes: a main body having a top surface with an air outlet, a bottom perimeter defining a bottom aperture of the main body, at least two downwardly facing air inlets and at least one side wall extending between the top surface and the bottom portion and shaped such that air received within an interior cavity of main body moves in a cyclone and wherein the at least two downwardly facing air inlets are in at least substantially the same plane as the bottom perimeter of the main body; and a dump valve assembly capable of being opened and closed with one hand where the dump valve is engaged with the bottom portion to seal the bottom aperture of the main body.

An axial cyclone air filtration apparatus integrated with a bipolar-charged agglomeration includes a pre-charge region and an axial cyclone coagulation dust separation apparatus, and the pre-charge region is arranged on an air inlet side of the axial cyclone coagulation dust separation apparatus. Suspended particles in air are charged with charges of different polarities in the pre-charge region before entering the axial cyclone coagulation dust separation apparatus. The organic combination of electric coagulation technology and axial cyclone dust separation technology improves the filtering efficiency for ultra-fine particles in air.

An axial cyclone air filtration apparatus integrated with a bipolar-charged agglomeration includes a pre-charge region and an axial cyclone coagulation dust separation apparatus, and the pre-charge region is arranged on an air inlet side of the axial cyclone coagulation dust separation apparatus. Suspended particles in air are charged with charges of different polarities in the pre-charge region before entering the axial cyclone coagulation dust separation apparatus. The organic combination of electric coagulation technology and axial cyclone dust separation technology improves the filtering efficiency for ultra-fine particles in air.

A wear-levelling apparatus (124) for a cyclone (100) includes: an upper section (128) defining an upper portion of a frusto-conical channel configured to receive material for delivery to a lower portion of the channel; a bearing assembly connected to the upper section; and a lower section (132) coupled to the upper section by the bearing assembly to permit rotation of the lower section about an axis of the channel; the lower section defining a lower portion of the channel configured to receive the material from the upper portion for discharge toward an outlet (120) of the cyclone.

The chamber (29A) of the overflow outlet control device (21A) has an inner circumferential surface which, when viewed in cross-sectional plan view, is generally in the shape of a volute, for directing material entering the chamber (29A) via the circular inlet (34) at the base portion (36) tangentially outward towards the discharge outlet (22A) located in the side wall (38). The top wall region (40) of the interior wall of the chamber (29A), a side wall portion (32) and base portion (36) together seamlessly form the chamber (29A) which is curved in shape internally. When material flows in use between the inlet (34) and the discharge outlet (22A), and passes through the central chamber (29A), it encounters no sharp corners or edges, but just smoothly curved or rounded interior wall surfaces. The top wall region (40) of the chamber (29A) also features a protruding flow control formation (42) which is joined or formed therewith, and which is arranged to extend into the chamber (29A), being directed face towards the inlet (34) such that in use the flow of material into the chamber (29A) via the inlet (34) directly encounters the formation (42).

The chamber (29A) of the overflow outlet control device (21A) has an inner circumferential surface which, when viewed in cross-sectional plan view, is generally in the shape of a volute, for directing material entering the chamber (29A) via the circular inlet (34) at the base portion (36) tangentially outward towards the discharge outlet (22A) located in the side wall (38). The top wall region (40) of the interior wall of the chamber (29A), a side wall portion (32) and base portion (36) together seamlessly form the chamber (29A) which is curved in shape internally. When material flows in use between the inlet (34) and the discharge outlet (22A), and passes through the central chamber (29A), it encounters no sharp corners or edges, but just smoothly curved or rounded interior wall surfaces. The top wall region (40) of the chamber (29A) also features a protruding flow control formation (42) which is joined or formed therewith, and which is arranged to extend into the chamber (29A), being directed face towards the inlet (34) such that in use the flow of material into the chamber (29A) via the inlet (34) directly encounters the formation (42).

A particle separator assembly includes an airbox providing an outer tapered portion tapering from a first section having a first cross sectional area to a first opening having a second cross sectional area less than the first cross sectional area. The example assembly includes a flow diverter providing an inner tapered portion that tapers to a second opening. The example assembly includes an air filter housed by the airbox, the air filter is spaced from the second opening in a first direction, and the first opening is spaced from the second opening in a second direction opposite the first direction.