The invention pertains to an air filter element comprising a tubular main body having a first axial end surface and a second axial end surface; wherein said first end surface comprises a first engagement means and said second end surface comprises a second engagement means; said first engagement means and said second engagement means being configured to enter into releasable engagement such that said first engagement means releasably engages with a second engagement means of a like air filter element in axial alignment with said air filter element and said second engagement means releasably engages with a first engagement means of a like air filter element in axial alignment with said air filter element; whereby said releasable engagement is able to withstand an axial pulling force up to a first level and whereby said releasable engagement is released when subjected to a pulling force above a second level.

The present application discloses an air purifier, including: a first body including a first housing; and a second body detachably connected to the first body and including a second housing, where buckles are arranged on the first housing, and snap-fit members are arranged on the second housing; the number of the buckles is greater than the number of the snap-fit members; and the first body in butt joint is enabled to rotate relative to the second body, so that the buckles can be hooked with the snap-fit members or separated from the snap-fit members. In the air purifier, a larger number of buckles are hooked with a smaller number of snap-fit members, so that disassembly and assembly operations can be simplified. Because the first body and the second body are detachable, the second body can be operated independently when the filter screen is detached.

A filtration sealing system is provided for sealing a filter element in a housing at a mating interface therebetween. The sealing system includes a keyed interface. A replacement filter element is provided for such filtration sealing system, with the replacement filter element including a keyed interface.

A filter cartridge configured to be removably positionable within an inner opening of a housing, wherein the filter cartridge includes a media pack having an inlet end, an outlet end, and an outer surface having an outer peripheral shape, at least one of: (a) a frame member at least partially surrounding the media pack, the frame member including a frame wall having a shape that is different from the outer perimeter shape of the media pack; and (b) a shell at least partially surrounding the media pack, the shell including a shell wall having a shape that is different from the outer perimeter shape of the media pack, and a sealing member extending at least partially around the inlet end of the media pack, wherein the sealing member comprises a pinch seal portion that is spaced from the outer surface of the media pack.

A filter element is provided that is preferably a side entry air filter having an air filter media pack, a housing seal and a frame that has a clamping projection, a pivot projection and/or guide members. The clamping projection can define a non-linear bearing surface that may be chevron shaped to provide for interface and potential alignment benefits. The housing seal may be a wave seal that undulates.

The present disclosure relates to fine filter part kit (63), comprising a replacement fine filter part (15) that is adapted to be mounted to a fine filter section (12) for a dust extractor (1). The fine filter part kit (63) further comprises a filter lid (16) that is adapted to be mounted to a corresponding used fine filter part (15) to be replaced, already mounted to the fine filter section (12), and thereby seal an opening (28) of a particle containing space inside the used fine filter part (15) before removing the used fine filter part (15). In this way, release of particles contained in the particle containing space into the ambient air is prevented and a secure disposal of the used fine filter part (15) is enabled.

An air purifier has an air filter including: a filter member including a plurality of filtration regions each having a plurality of vertical pleats extending in an up-down direction and side surfaces connected to be rotatable with respect to each other; and a frame having a plurality of supports for supporting the plurality of filtration regions. Each of the plurality of supports includes a groove having a shape corresponding to any one of an upper edge and a lower edge of each of the filtration regions. Each of the filtration regions is supported by the supports by at least a part of the upper edge or the lower edge being inserted into the groove.

A filter element (100) that is to be mounted in a housing (102) has at least one substantially hollow cylindrical filter bellows (10, 20) designed to separate liquid from aerosol, and two cover elements (30, 40) designed to cover axial end regions (12, 14, 22, 24) of the filter bellows (10, 20). The axial end portions (12, 14, 22, 24) of the at least one filter bellows (10, 20) are pressed against the cover element (30, 40) by an axial compressing force. The at least one filter bellows (10, 20) is secured in the axial direction, and one respective sealing zone (16, 18, 26, 28) is formed between each filter (10, 20) and each cover element (30, 40).

Embodiments described herein relate generally to filter assemblies that include filter elements with cross-channel flow having flat and/or folded arrangements for optimized functionality and performance. The filter assemblies may be formed (e.g., shaped, constructed, etc.) using a variety of shapes, angles, configurations, and materials to improve the filtration and cross-channel flow of fluid through the filter media. The filter media may implement a wide variety of patterns (e.g., repeating, origami, rounded, etc.), shapes (e.g., tetrahedral, rhombus, square), and construction (e.g., pleated, integrated, interdigitated, etc.).

A fluid filter has a filter housing with inlet opening for fluid to be cleaned and outlet opening for cleaned fluid. A filter element arranged in an element receptacle of the filter housing separates inlet opening from outlet opening. The filter housing has a housing body with an installation opening to the element receptacle, through which the filter element in an installation direction is introduced into the element receptacle. The filter housing has a housing cover for closing the installation opening. The installation opening is arranged in a transverse side of the housing body that is lateral relative to the housing axis. The filter housing has a sealing surface, surrounding the housing axis at least partially circumferentially, for contacting a seal of the filter element. The filter element has a seal support device for the seal and the filter housing has a pressing device for the seal support device.