An air cleaner assembly for filtering intake air for a power plant can include a filter cartridge disposed within a housing of the air cleaner assembly, a precleaner assembly including at least one particle separator for separating particulates from an airflow stream and a scavenge port for discharging the separated particulates, the precleaner assembly being located upstream of the filter cartridge, a scavenge system for evacuating the separated particulates out of the scavenge port, the scavenge system including an electric motor coupled to an fan, an input sensor generating an input signal relating to a parameter associated with one or more of the precleaner assembly, the air cleaner assembly, a power plant receiving air from the air cleaner assembly, and a vehicle associated with the power plant, and a controller for operating the speed of the scavenge system based on the input signal from the input sensor.

Disclosed is an air filter and a method of manufacture for an air filter which is much more cost effective and provides greater operational effectiveness than state-of-the-art air filters. The air filter includes an outer metallic shell which may be used to attach the filter in line to ducting of a heating, ventilation, and air conditioning (HVAC) system. The filter may further include a filter unit made of activated carbon material. The filter unit may have one or more sections and may have a honeycomb cross section.

Disclosed is an air filter and a method of manufacture for an air filter which is much more cost effective and provides greater operational effectiveness than state-of-the-art air filters. The air filter includes an outer metallic shell which may be used to attach the filter in line to ducting of a heating, ventilation, and air conditioning (HVAC) system. The filter may further include a filter unit made of activated carbon material. The filter unit may have one or more sections and may have a honeycomb cross section.

A filter module, including a plurality of filter elements for separating overspray from an air flow, the filter module including a reusable and cleanable frame configured as a support structure for components for collecting overspray, and a plurality of components inserted into the frame for collecting overspray, wherein the components for collecting overspray are at least filter elements and linings in the frame, which are configured as disposable, single-use products the filter elements form at least a first filter stage, and all the surfaces of the frame which are exposed to the air flow upstream of the first filter stage are provided with the linings such that the surfaces of the frame are protected against overspray.

Methods and systems are provided for a multiplexed phase separating inertial filter that is composed of helical through holes generating centrifugal separating forces. In one example, the inertial filter may be a planar porous material with an array of helical channels, each helical channel of the array of helical channels extending from a top surface of the porous material to a bottom surface of the porous material.

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.

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.

A hand vacuum cleaner comprises a cyclone comprising a front end having a cyclone air inlet, a rear end having a cyclone air outlet and a cyclone axis of rotation extending between the front end and the rear end of the cyclone. A conical pre-motor filter is positioned rearward of the cyclone. The pre-motor filter has a front end that faces that faces towards the cyclone air outlet. A suction motor is positioned rearward of the pre-motor filter. The suction motor has an inlet end that faces towards a rear end of the pre-motor filter. A handle is provided at the rear end of the hand vacuum cleaner and is positioned rearward of the suction motor. The handle has an energy storage member housing, The cyclone axis of rotation and the suction motor axis of rotation are parallel, and the handle axis extends at an angle to the cyclone axis of rotation and the suction motor axis of rotation.

A system for treating exhaust gas generated by combustion of biomass comprises a frame, a first cyclonic separation stage supported on the frame and comprising a plurality of parallel gas cyclones in fluidic communication with an inlet receiving the exhaust gas for removing from the exhaust gas particulate matter exceeding a first threshold size, and a second bag filtration stage supported on the frame and comprising a plurality of serially-communicated baghouses each comprising a plurality of bag filters therein for removing, from the partially treated exhaust gas received from the first cyclonic separation stage, particulate matter exceeding a second threshold size that is smaller than the first size which was passed through the first treatment stage. The gas cyclones of the first stage are arranged in a laterally extending row across the frame and the baghouses are arranged in a longitudinally extending row across the frame.