This disclosure relates to aggregating, neutralizing, and filtering ultra-fine particles in fluids such as air and water. Fluid may be drawn from an ambient environment into a neutralization chamber. Within the neutralization chamber, particles in the fluid may be agglomerated. An acoustic field may be applied to the fluid to agglomerate the particles. The agglomerated particles may be exposed to light. The light may denature or deactivate the agglomerated particles. The agglomerated and inert particles may be passed through a filter. After agglomeration and neutralization, the fluid may be released back into the ambient environment.

A particle separator nozzle valve includes a connection portion, which provides at least one tapered inner surface. A tapered portion extends from the connection portion. The tapered portion includes a tapered inner surface and a tapered outer surface. A first protrusion extends from the inner surface and a second protrusion extends from the outer surface. A lip portion extends from the tapered portion.

A filtration assembly includes a housing. The housing includes a first housing for fluid and a second housing opening for fluid. A containment cover is removably coupled to the housing. The containment cover defines a cover opening, a cover surface, and a flow passage. The cover opening is in fluid communication with the housing. The cover surface is substantially continuous around a circumference of the containment cover. The cover surface includes an open portion in fluid communication with the second housing opening. The flow passage is formed by a first passage surface and a second passage surface. The flow passage includes a first end in fluid communication with the cover opening. A second end is in fluid communication with the second housing opening through the open portion of the cover surface. The flow passage extends radially outward from the cover opening.

A filter element for an air filter has a filter bellows with a filter medium folded multiple times. A recess is disposed in the filter bellows and is designed to receive a guiding rib of the air filter. The recess is curved at least in sections thereof along a length extension of the recess. The air filter has a housing and a guiding rib, wherein the filter element is arranged at least partially in the housing and the guiding rib is immersed at least partially in the recess of the filter element. In a method for producing the filter element, the recess in the filter bellows is formed with a computer-assisted separation method that forms the recess to be curved at least in sections thereof.

Proposed are a directional airflow device and an air cleaner with the same. The directional airflow device includes: a cylindrical fan accommodating portion (140) including a fan assembly (150) that is configured to generate a flow of air; and a cylindrical guide accommodating portion (160) integrally formed on the fan accommodating portion (140), and including an airflow forming member (170) that is configured to discharge air suctioned by the fan assembly and guided to an airflow forming space, through a discharge port, wherein the airflow forming member is configured such that at least two helical bodies having different pitches are arranged in the airflow forming space along a circumferential direction of the guide accommodating portion, so that a part of the helical bodies forms a directional airflow having straightness, and a remaining part discharges air radially.

A filter media pack with pleat folds, pleat panels and a plurality of glue bead sections is provided. The glue bead sections provide increased rigidity, dimensional stability and maintain spacing between adjacent pleat panels. Methods of manufacturing the filter media packs are provided. Filter elements including the filter media packs are contemplated.

A gas-liquid separation device includes a housing assembly, a separation assembly, a bottom end plate, an exhaust pipe, and a seal. A separation chamber is defined in the housing assembly. A bottom of the housing assembly has a through-opening. The separation assembly performs gas-liquid separation on a gas-liquid mixture. The bottom end plate is located at a bottom of the separation assembly. A liquid reservoir is defined by the bottom end plate and receives a liquid separated by the separation assembly. The exhaust pipe has an exhaust channel and a liquid discharge channel. The exhaust pipe passes through the through-opening to allow a gas separated by the separation assembly to flow through the exhaust channel. A flow diversion cavity is defined between the exhaust pipe and the bottom end plate, and is in communication with an outlet of the liquid reservoir and an inlet of the liquid discharge channel.

Filter media including one or multiple sheets of filter media, an upstream inlet, and a downstream outlet. A pleat pack can be formed by alternately folding a flat sheet along pleat fold lines with a high media surface density. The flat sheet of filter media may include a separation geometry feature or separation mechanism that maintains a separation distance between adjacent pleats of the filter media. A separation geometry can comprise one or more embossments forming a raised surface, an inlet spacer mesh and/or an outlet spacer mesh positioned between adjacent pleats, and/or an adhesive bead. The upstream inlet receives dirty fluid along a first direction and the downstream outlet discharges clean fluid along a second direction substantially not parallel to the first direction. The filter element defines an angle between the inlet and outlet flow, allowing large dust particles to move out of the media pack due to inertia.

A filter element including a filter media, an end cap, and a baffle. The filter media is configured to be secured within a housing. The housing includes an inlet configured to accept a fluid for filtering and the filter media including a circumferential outer surface. The end cap is positioned at and coupled to one end of the filter media. The baffle is positioned relative to the filter media at a position such that, when the filter element is correctly installed within the housing, the baffle is proximate the inlet of the housing. The baffle extends around only a portion of the circumferential outer surface of the filter media in a radial direction.

A filter element including a filter media, an end cap, and a baffle. The filter media is configured to be secured within a housing. The housing includes an inlet configured to accept a fluid for filtering and the filter media including a circumferential outer surface. The end cap is positioned at and coupled to one end of the filter media. The baffle is positioned relative to the filter media at a position such that, when the filter element is correctly installed within the housing, the baffle is proximate the inlet of the housing. The baffle extends around only a portion of the circumferential outer surface of the filter media in a radial direction.