Disclosed is an invention related to a fan module, and a portable air purifier having same. The disclosed invention has a front end protrusion part provided on the rotation-directional front end of a fan blade provided on a fan, wherein the front end protrusion part protrudes forward in the rotational direction, from the rotation-directional front end of the fan blade, and at least a portion of the front end protrusion part further protrudes forward in the rotational direction than a connection point of a shroud and the rotation-directional front end of the fan blade.

A diffuser includes a first tube and a second tube. The first tube includes a key and defines a first opening. The second tube is inserted through the first opening. The second tube defines a notch. The key is inserted into the notch.

This invention generally relates to a system and process for recovering fugitive gas emissions, and more particularly, systems and processes for recovering wet and dry gas emissions from reciprocating compressor packing boxes, gas-operated control valves and pumps, and other packing systems that leak under normal operating conditions. The system and process recover fugitive gases from a compressor packing case and pneumatic components by utilizing a backpressure regulator to maintain a positive pressure in the packing case and pneumatic components and then producing a vacuum to capture and transport any fugitive gas emissions. The recovered emissions are then pressurized to meet the pressures necessary to reenter the first stage of the compressor packing case or the compressor fuel gas system.

Rotating coalescer elements that maximize the radial-projected separation surface area in a given (rotating) cylindrical volume, where flow to be cleaned is passing axially upward or downward through a separating media of the rotating coalescer element. Various example package assemblies are provided with various types of rotating configurations including cylindrical coiled media packs, frustum coiled media packs, concentric cylinders, coiled metal or polymer films with and without perforations, and/or alternating layers of different materials. The described rotating coalescers may be driven by hydraulic turbine, electric motor, belt, gear or by mounting on rotating machine components, such as rotating engine shafts or connected components.

A media basket assembly for use with an air purifier, such as but not necessarily limited to media basket assembly suitable for use with a vertical airflow type of air purifier. The media basket assembly may include a filter media configured to filter the airflow and a basket for positioning the filter media relative to a lower fan shroud of the air purifier.

An airborne pathogen extraction system that provides for continuous airborne pathogen particle extraction from a specifically targeted area in a room or a specifically targeted area proximate to a user. The pathogenic particles are filtered and/or disinfected before the air is returned proximate to the originating location, or are directed an area away from the user(s). The airborne pathogen extraction systems and methods lower the chances of contagion or infection from airborne pathogens, such as viruses.

Rotating coalescer elements that maximize the radial-projected separation surface area in a given (rotating) cylindrical volume, where flow to be cleaned is passing axially upward or downward through a separating media of the rotating coalescer element. Various example package assemblies are provided with various types of rotating configurations including cylindrical coiled media packs, frustum coiled media packs, concentric cylinders, coiled metal or polymer films with and without perforations, and/or alternating layers of different materials. The described rotating coalescers may be driven by hydraulic turbine, electric motor, belt, gear or by mounting on rotating machine components, such as rotating engine shafts or connected components.

An air filter has a filter housing having a raw air inlet and further has a filter element arranged in the filter housing. The filter element has a filter medium body and an end disk with a central primary air passage and a secondary air passage. The filter medium body annularly surrounds a longitudinal axis of the filter element and separates a raw side in the filter housing from a clean side inside the filter element. The filter housing has a primary air outlet communicating through the primary air passage with the clean side of the filter element. The filter housing has a secondary air outlet communicating through the secondary air passage with the clean side of the filter element. The secondary air outlet communicates with the secondary air passage through a channel arranged at the filter element, wherein the channel surrounds the primary air passage annularly and coaxially.

A filter element has a filter medium folded in a star shape that surrounds annularly a longitudinal axis of the filter element and is flowed through radially from exterior to interior. The filter element has a primary air passage and a secondary air passage. In the filter medium, a cutout is formed that penetrates a plurality of folds of the filter medium. A passage socket at which the secondary air passage is formed extends through the cutout. An air filter provided with a filter housing having a raw air inlet, a primary air outlet, and a secondary air outlet, has such a filter element that separates in the filter housing a raw side communicating with the raw air inlet from a clean side. The primary air outlet communicates through the primary air passage and the secondary air outlet through the secondary air passage with the clean side, respectively.

An air purification unit is provided for individuals seated at a table that has a unit body adapted to be mounted at a mounting height at or above the approximate head height of individuals seated at the table, and in a position between the individuals. A motorized fan system is provided within the unit body that is configured to draw air from at least one inlet proximate the bottom of the unit body. A filter is positioned in communication with the inlet and the fan system for filtering air drawn through the inlet. The unit body has at least two ducted outlets disposed radially or axially for discharging filtered air toward the individuals, while the unit prevents cross-flow of breath air between the individuals.