The present application relates to the technical field of filter structure, and in particular to a filter and an air purifier. The filter is for installation in a mounting frame. The filter includes a filter body. A positioning groove is provided on a side of the filter body facing toward the mounting frame. A positioning protrusion is provided in the mounting frame. The positioning protrusion and the positioning groove are configured to correspond to each other and cooperate with each other. When the filter body is installed in the mounting frame, the positioning protrusion enters the positioning groove.

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.

A fastening system for applying, over an opening and surrounding fascia of a structure, a covering material including either of a flexible or rigid outer reinforced extending perimeter within which is configured a plurality of receiving apertures. A plurality of rails are adapted to being secured to the fascia in extending fashion proximate the opening, each of the rails exhibiting a three dimensional cross sectional shape with a forwardly projecting support surface within which is configured an outwardly facing narrowed slot for receiving a plurality of fasteners for securing the edges of the covering. An insert secures together the elongated channels in perimeter defined fashion over the intake opening. The inserts each have compression fitting sides adapted to inter-engage within the interior channels of the rails. The compression fitting sides can also include any collection of ramps, dimples, protuberances or crush portions to facilitate frictional fitting of the inserts within the channel interior following an initial disassembly of an associated kit from the intake surface, additional and replacement inserts are provided for subsequent reassembly.

A drawer type air cleaner having increased maintenance convenience is provided. The drawer type air cleaner includes a door that is configured to open or close an opening of filter receiving cavity formed in air cleaner body that suctions exterior air and discharges fresh air and a filter disposed in the filter receiving cavity and configured to filter out foreign substances from the exterior air and convert the exterior air into fresh air. The filter having a packing is disposed in the filter receiving cavity and thus provides an airtight seal between the filter and the filter receiving cavity. A filter protector is interlocked with an operation of closing the door to convert the filter from an incompletely coupled state when the filter disposed in the filter receiving cavity and is unable to compress the packing into a fully coupled state to a state when the filter compresses the packing.

A filter element is provided with a cartridge locating system. The filter element includes a closed end cap and an open end cap with a tubular ring of filter media disposed between the end caps. The filter element includes an annular seal that can seal to round and non-round sealing surfaces and acts to block fluid flow between the open end cap and a pipe assembly in a pressure vessel assembly. A support bar is enclosed by the filter media and has a key. The filter element has a key receptacle to receive the key of the support bar. The user knows that the seal between the filter element and the pipe assembly is fully aligned and engaged when the key from the support bar fully enters the key receptacle of the filter element.

A fastening system for applying, over an opening and surrounding fascia of a structure, a covering material including either of a flexible or rigid outer reinforced extending perimeter within which is configured a plurality of receiving apertures. A plurality of rails are adapted to being secured to the fascia in extending fashion proximate the opening, each of the rails exhibiting a three dimensional cross sectional shape with a forwardly projecting support surface within which is configured an outwardly facing narrowed slot for receiving a plurality of fasteners for securing the edges of the covering. An insert secures together the elongated channels in perimeter defined fashion over the intake opening. The inserts each have compression fitting sides adapted to inter-engage within the interior channels of the rails. The compression fitting sides can also include any collection of ramps, dimples, protuberances or crush portions to facilitate frictional fitting of the inserts within the channel interior following an initial disassembly of an associated kit from the intake surface, additional and replacement inserts are provided for subsequent reassembly.

An air duct filter apparatus for filtering air discharged from an air duct into a room, vehicle or other space at a duct opening in a surface. The apparatus has a venting device, such as a register or vent, that fits within the duct opening. A pair of filter brackets on the venting device support an air filter behind a venting area, typically having louvers, of the venting device. Preferably, the air filter is sized to frictionally engage the filter brackets so it will be held in place but be easily removable from the brackets. A pair of duct brackets are mounted to the surface on opposite sides of the duct opening. A connecting mechanism connects the venting device with the duct brackets in a manner that allows the venting device to be pulled away from the surface to inspect, clean or replace the air filter without using tools.

Filter assemblies are described and shown. Components, features and methods of assembly and use are described. Many of the principles relate to preferred cartridge configurations for engagement with selected housings. Selected optional features described can be used to provide indication to a service provider that a proper cartridge is not positioned appropriately in the housing for use.

A V-bank filter assembly and a replaceable air filter are provided. In one embodiment, the V-bank filter assembly includes a top panel and bottom panel coupled in a spaced apart relation, each of the top and bottom panels having a first edge and a second edge, a plurality of panel end seal struts extending between the top and bottom panels, each panel end seal struts having a first mating sealing feature facing the first edge of the top and bottom panels, the first mating sealing feature configured to sealingly engage a replaceable filter panel, wherein the plurality of panel end seal struts are located adjacent the second edge, and a plurality of filter panel receiving tracks defined between the top and bottom panels configured to align filter panels disposed in the tracks with a respective first mating sealing feature.

A flat filter element has a filter medium and a sealing section that seals the flat filter element relative to a filter housing. A support element section is arranged on a circumferential side of the filter medium outside of the sealing section and supports the flat filter element relative to an inner side of the filter housing, wherein the support element section projects past the filter element in at least one direction. The filter housing has a mounting opening through which the flat filter element is inserted into the interior where the flat filter element is arranged such that the inlet is separated from the outlet of the filter housing. A projection arranged on an inner side of the filter housing supports under mechanical tension the support element section of the flat filter element in a mounting position of the flat filter element in the interior.