A filtration system having an undulated interlocking housing-endplate interface geometry is described. In the filtration system, a filter element endplate and a filter housing component (e.g., a shell housing, a filter mounting head, etc.) meet at an interface. The filter housing component includes an undulating or repeating pattern that meshes with a matching undulating or repeating pattern on the endplate of the filter element. The undulating or repeating pattern prevents the filter element from freely rotating with respect to the filter housing component of the filtration system.

Air cleaner assemblies, components therefor, and features thereof are described. Also described are methods of assembly and use. In depicted examples, the air cleaner assemblies and components optionally use advantageous housing seal features. Methods of assembly and use are described.

A filter assembly includes a housing, a filter element, and an end cap. The housing includes an interior surface, an exterior surface, and a protrusion. The interior surface defines an interior volume. The exterior surface is opposite the interior surface. The protrusion extends from the exterior surface. The filter element is configured to be disposed at least partially in the interior volume of the housing. The end cap includes an axially-extending outer rim defining a slot configured to receive the protrusion to inhibit rotation of the end cap relative to the housing.

An air purifier includes a filter member for filtering pollutants in the air, a blower for providing blowing force to allow the air to pass through the filter member, a body frame accommodating the blower, a cover frame that forms a part of an appearance of the air purifier and is detachably coupled to the body frame, and a filter frame that is detachably coupled to the cover frame and detachably supports at least a portion of the filter member. When the filter frame is coupled to the cover frame, the filter member is positioned between the cover frame and the filter frame so that movement of the filter member is restricted, and when the cover frame is attached to and detached from the body frame, the filter member and the filter frame are attached and detached together with the cover frame.

An air filtration apparatus includes an airflow powerhead assembly including a fan assembly and a vane assembly, a filter assembly, and a separator chamber housing inside of which the filter assembly is disposed. The separator chamber housing has a chamber inlet at a first axial side and a clean air outlet at a second axial side of the separator chamber housing opposite the first axial side. The filter assembly has a first axial end adjacent the chamber inlet and a second axial end adjacent the clean air outlet. The separator chamber housing includes at least one debris ejection slot extension configured to eject debris from an inner space of the separator chamber housing. The filter assembly includes a debris catch tray disposed at the second axial end, the debris catch tray having a debris ejection slot aligned with the at least one debris ejection slot extension.

Air cleaner assemblies, components therefor, and features thereof are described. Also described are methods of assembly and use. In depicted examples, the air cleaner assemblies and components optionally use advantageous housing seal features. Methods of assembly and use are described.

Various example embodiments relate to a filtration system. The filtration system comprises a housing having a first housing end and a second housing end. The housing defines a central compartment therein. The housing comprises a first alignment portion disposed on the first housing end. The filtration system further comprises a filter element positioned within the central compartment of the housing. The filter element has a first filter end and a second filter end. The filter element comprises filter media and a second alignment portion disposed on the first filter end. The second alignment portion is complementary to the first alignment portion. The installation of the filter element within the housing causes the first alignment surface and the second alignment surface to align to provide for engagement of a radial seal between the filter element and the housing.

The present disclosure relates to a method for making a ceramic mini-tube configured for use in a fluid modification system. The method involves using an electrospinning system to receive a quantity of precursor solution. The electrospinning system creates an electric field which causes the precursor solution, when emitted, to be stretched into a fiber jet. The fiber jet is deposited on a collector resulting in a fiber mat. The fiber mat is removed from the collector, wherein the fiber mat is formed into a shape. The fiber mat is further processed so that the fiber mat retains a desired shape. A heat treatment operation is then performed to convert the fiber mat into a ceramic structure having the desired shape.

The present disclosure relates to a modular fluid modification system having an outer container configured to permit a fluid flow there into at a first location, and to allow the fluid flow to exit the container at a second location spaced apart from the first location. A plurality of fluid contacting elements is housed in the outer container. The fluid contacting elements each form an independent filtering or reactor element. Each fluid contacting element includes a plurality of openings formed in a grid or lattice-like pattern.

The present disclosure relates to a fluid modification system having a container structure and a plurality of independent, ceramic elements. The ceramic elements may be arranged in random orientations and contained in the container structure, thus causing a fluid flow entering the container structure at any given cross-section location to flow over the surfaces of a first subplurality of the ceramic elements, and through the porous walls of a second subplurality of the ceramic elements, before exiting at a second location of the container structure. Each one of the ceramic elements has at least one of a nanofibrous or nanoporous microstructure to enable internal flow both through a wall structure thereof, and over and around the wall structure to affect performance.