The present disclosure provides methods and apparatus to for user customizable configurations and replacement of a heating, ventilation and air conditioning filter media and frames. A media filter media may be combined with a media frame according to user specifications. One filter media or combinations of multiple filter media may be chosen by a user to create custom filter configurations. Filter media may be separated from the media frame and disposed of in a manner generally more convenient than traditional HVAC filter replacement.

The disclosure relates to a filter assembly (16) comprising a frame (6) comprising a frame part (6.1) having a top side (7a), a bottom side (7d), inner edges (7c) defining an aperture (26) and outer edges (7b) forming an outer perimeter of the frame part (6.1), and a bag-like insert (11) comprising filter material and having an open upper portion (14) and at least one closed bottom portion. The insert (11) is fitted into the aperture (26) of the frame (6) with the open upper portion (14) bent over the frame part (6.1) to cover the top side (7a), the outer edges (7b) and at least part of the bottom side (7d) of the frame part (6.1). The upper portion (14) of the insert (11), which is bent over the frame (6), comprises a stretch region (27) made of stretchable material. The insert (11) is fastened to the frame (6) by a pressing force generated by the stretch region (27) against the frame (6).

An air cleaner includes a case, an air inlet, an air outlet, a grill covering the air inlet to filter airborne oil droplets, a fan to suction air through the air inlet and discharge air out of the air outlet, a roll filter provided between the grill and the fan to filter oil mist, and a filter roller to cut the roll filter. The roll filter includes a roller and a filter sheet wound around the roller, and the filter sheet may be unwound to extend behind the grill. When the filter sheet becomes dirty, the roll filter is further unwound so that a clean section is provided behind the grill, and the filter cutter may cut off the dirty section. During cutting, a clamp holds down the filter sheet. The case includes a slit through which the dirty section of the filter sheet passes for discarding.

A filter assembly includes a body of filter media, a seal, and a compression ring. The body of filter media having a first end surface, a second end surface spaced apart from and opposing the first end surface, and an outer surface extending between the first end surface and the second end surface. The seal surrounds the first end surface. The compression ring is disposed about the second end surface. The compression ring includes a first channel configured to allow fluid communication between the second end surface and the outer surface.

An air cleaner includes a case, an air inlet, an air outlet, a grill covering the air inlet to filter airborne oil droplets, a fan to suction air through the air inlet and discharge air out of the air outlet, a roll filter provided between the grill and the fan to filter oil mist, and a filter roller to cut the roll filter. The roll filter includes a roller and a filter sheet wound around the roller, and the filter sheet may be unwound to extend behind the grill. When the filter sheet becomes dirty, the roll filter is further unwound so that a clean section is provided behind the grill, and the filter cutter may cut off the dirty section. During cutting, a clamp holds down the filter sheet. The case includes a slit through which the dirty section of the filter sheet passes for discarding.

A filter element for insertion into a housing of a filter system. The filter element includes a filter medium pack and a seal receiver. The filter medium pack has an outer circumferential face extending between a first outer axial face and a second outer axial face, opposite the first outer axial face. The filter element further includes a seal receiver sealingly attached to the filter medium pack. The seal receiver includes a closed-loop surface suitable for receiving a removable circumferential seal member, and wherein the closed-loop surface forms a contour shape with single-fold rotational symmetry. A seal assembly including a filter element and a seal carrier is also presented.

An extraction arm for an extraction device includes a suction pipe and a suction head and defines a suction path that extends from an extraction region in the surroundings of the suction head through the suction pipe to the extraction device. The extraction arm includes an exchangeable filter which is arranged within the suction path. The filter is located in a filter housing which has a main body and a closable cover. The filter is exchangeable, which makes it very easy to prepare the extraction arm for a new application. Since the filter is arranged in front of the suction pipe, the suction pipe remains clean. The filter can easily be changed, whereby disinfection or cleaning of the suction pipe is not necessary.

An air cleaner includes a case, an air inlet, an air outlet, a grill covering the air inlet to filter airborne oil droplets, a fan to suction air through the air inlet and discharge air out of the air outlet, a roll filter provided between the grill and the fan to filter oil mist, and a filter roller to cut the roll filter. The roll filter includes a roller and a filter sheet wound around the roller, and the filter sheet may be unwound to extend behind the grill. When the filter sheet becomes dirty, the roll filter is further unwound so that a clean section is provided behind the grill, and the filter cutter may cut off the dirty section. During cutting, a clamp holds down the filter sheet. The case includes a slit through which the dirty section of the filter sheet passes for discarding.

An air filter subassembly includes a filter element with a pre-cleaner tube member that is snapped onto the filter element.

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.