This application provides an air purifier, which includes a casing, a fan, a filter, and a purification module. The filter is in a cylindrical shape. The purification module includes an inner filter for purification of harmful gases in air. The inner filter includes an inner filter cylinder and a purification plate, the purification plate and/or the inner filter cylinder are honeycomb-like or reticulate, and the inner filter cylinder is disposed in the filter. In the present application, the air purifier is provided with an inner filter to remove harmful gases such as formaldehyde in the air, and the purification plate and/or inner filter cylinder are honeycomb-like or reticulate to reduce wind resistance of the inner filter and reduce air resistance, thereby reducing the fan speed and noise.

This application provides an air purifier, which includes a casing, a fan, a filter, and a photocatalytic module. The filter is in a cylindrical shape. The photocatalytic module includes a photocatalytic cylinder having a cylindrical shape and a light source for irradiating the photocatalytic cylinder. The photocatalytic cylinder is disposed in the filter, an upper end of the photocatalytic cylinder is supported in the casing, and the light source is installed in the casing. In the present application, the air purifier is provided with a photocatalytic module which can decompose harmful gases and enables a sterilization, thus the purification performance can be improved. The filter and the photocatalytic cylinder both have a cylindrical shape, and the photocatalytic cylinder is disposed in the filter.

Various arrangements of a turbine for a rotating coalescer element of a crankcase ventilation system for an internal combustion engine are described. In some arrangements, the turbine is an impulse turbine, which is also known as a pelton turbine or a turgo turbine. The turbine is used to convert hydraulic power from a stream of pressurized fluid to mechanical power that is used to drive the rotating element. The turbine includes a non-wetting surface (e.g., an oleophobic or hydrophobic surface) that repels the pressurized fluid. The non-wetting surface may be achieved through plasma coating, fluoropolymer coating, micro-topography features, and the like. The non-wetting surface increases the power transmission efficiency from the stream of pressurized fluid to the turbine, thereby increasing the rotational speed of the rotating element compared to wettable surfaced turbines, which in turn increases the efficiency of the rotating element.

A filter housing for a filter device is provided with an inlet housing arranged upstream of a filter element. The inlet housing has an inflow opening for introducing a fluid to be purified into the filter housing. The inlet housing has an overflow opening at an outlet of the inlet housing, wherein the overflow opening conveys the fluid to be purified to the filter element. The inlet housing has an inlet channel disposed between the inflow opening and the overflow opening. The inlet channel has an intermediately positioned channel section located between the inflow opening and the overflow opening, wherein a cross-sectional shape of the intermediately positioned channel section differs from a cross-sectional shape of the inflow opening and from a cross-sectional shape of the overflow opening.

An air purifier includes a filter, a fan to suction air through the filter, a first case configured to cover the filter and the fan, and a second case overlapping with the first case. The first and second cases may be moveable in a vertical direction such that the second case may be raised to lengthen the air purifier and the first case may be raised to expose the filter for replacement. The second case may be provided outside of the first case and have a side discharge grill and a top discharge grill, which may each be selectively opened and closed.

A sorption device for filtering evaporation emissions from a fuel tank, includes a vessel, with a first opening connected to an air removal path of the fuel tank and a second opening opening to atmosphere, a middle annular space between a radial outer circumferential boundary of the middle annular space and a radial inner circumferential boundary thereof radially inwardly spaced apart from the outer boundary, a first annular space formed between a radial inner surface of a fluid-tight circumferential outer shell of the vessel, the radial outer boundary being radially inwardly spaced from the inner surface, a sorbent material arranged in the middle annular space, and evaporation emissions from the fuel tank are guided through the first opening into the first annular space, through the sorbent material into a central space of the vessel in the radial direction, and through the second opening to atmosphere or another sorption device.

A dust mitigation system for a mobile sweeper, the dust mitigation system including a cover to at least partially cover one or more brushes of the mobile sweeper, a dust collector including at least one fan and one or more filters, and at least one duct fluidly connecting the cover with the dust collector.

A vacuum cleaner comprises: a suction part for suctioning external air; a discharge part through which the sucked air is discharged to the outside; a frame along a flow path between the suction part and the discharge part; and a filter including a filter member which is supported by the frame and which separates dust from the suctioned air, wherein the filter member includes: a first filter part spaced from and to be parallel with an opening formed in the frame; a second filter part having one side supported by the frame and another side extended from the one side thereof toward the edge of the first filter part; and a bent part between the edge of the first filter part and the other side of the second filter part, and the thickness of the first filter part or the second filter part is different from the thickness of the bent part.

An air cleaner for an internal combustion engine is disclosed. The air cleaner may include a housing defining an interior and having a first end and a second end opposite the first end. The housing may include an air inlet configured to be fluidly coupled to an air intake of the internal combustion engine and an air outlet configured to be fluidly coupled to a compressor of the internal combustion engine. The housing may include a general cylindrical shaped section extending from the first end and an inverse taper section located distally from the generally cylindrical shaped section and extending towards the second end. A diameter of the inverse taper section may increase from a first end towards the second end.

A vacuum cleaner includes a suction inlet, a suction source configured to generate an airflow through the suction inlet to draw debris with the airflow through the suction inlet, and a separator assembly. The separator assembly includes a housing having an air inlet and an air outlet, a debris collection chamber within the housing, and an inner chamber formed within a shroud that defines a cyclone axis and has a perforated portion. The inner chamber has a first end and a second end. The first end has a tangential inlet. The second end is open toward the debris collection chamber. An outflow passageway is outside of the shroud and in fluid communication with the air outlet and a filter is in fluid communication with the outflow passageway.