An air filtration device for filtering air exiting an outlet vent of a heating, ventilation, and air conditioning (HVAC) system includes a filter assembly that is sized and shaped complementarily to a cross-sectional profile of the HVAC system. The filter assembly is selectively insertable into the duct of the HVAC system behind a vent cover that is attached to the duct. The filter assembly comprises a plurality of ribs to which a filter is attached. The filter has a perimeter that is complementary to a cross-sectional profile of the duct so that the filter frictionally attaches to the duct. The filter removes contaminants from air that exits from the vent cover.

An air filter media construction or arrangement is disclosed. The air filter media construction or arrangement includes facing media secured to fluted media. A preferred projection/receiver arrangement is described. Also, a useful seal arrangement is described. Air cleaner assemblies, methods of assembly and use are also provided.

The present invention discloses a rectangular shaped filter and coalescer elements and a vessel that houses a plurality of such rectangular shaped elements. Greater filtration or separation efficiency is provided due to increased number and alignment of rectangular shaped filter elements in the vessel. The rectangular shaped filter elements are also easy to replace.

An air filtration system is provided. The air filtration system embodies filtration material supported by a frame, wherein the air filtration system provides two framed filtration materials sandwiching a fabric filter. Such framework may be removably engaged through magnetic forces. The filtration material may hold and/or carry electrostatic forces and/or magnetostatic forces induced through a current from an electrical power source and/or magnetic forces of the magnetics.

The present invention provides an air purifier, and relates to the technical field of air purifiers. The air purifier comprises an air filter box with openings at a top and a bottom, and further comprises a top plate covering the opening at the top of the air filter box and a bottom plate covering the opening at the bottom of the air filter box. The top plate and the bottom plate are both detachably connected with the air filter box; the top plate is provided with an air inlet and outlet; and the top plate is provided with an air extraction assembly located at the air inlet and outlet. By adopting the present invention, the air purifier is convenient to detach and install and is conveniently placed in a suitcase, etc. for carrying; using locations of the air purifier are flexible; and convenience is brought to use by a user.

An electrical apparatus for breaking an electric current includes an electrical arc extinguishing chamber, for extinguishing an electrical arc formed on the separation of electric contacts, provided with an extinguishing gas exhaust orifice and an extinguishing gas filtration system, placed at the output of the exhaust orifice and including a filter and a gas diffusor. The gas diffuser includes, superposed between them, a central layer and two outer layers arranged on either side of the central layer. The central layer is provided with first through holes. Each outer layer is provided with second through holes. The first holes are misaligned relative to the second holes so that each of the second holes emerges on a solid portion of the central layer without any first hole.

A filter including a filter media pack, first and second preform members and first and second adhesives is provided. The first preform member is disposed over the media pack. The first preform member has a wall defining a well. The wall defines a notch. The first adhesive in the well attaches the first preform member to the filter media pack. The first adhesive has a contact region disposed in the notch. The second preform member is disposed over the first preform member. The second adhesive bonds the first preform member over the first preform member. The second adhesive engages with the first adhesive at the contact region.

A filter element is provided with a filter medium body that is a folded filter of filter paper. The filter medium body has an inflow side and an outflow side. A sealing element is arranged on the filter medium body. At an end edge face, the filter medium body has an adhesive bead filling at least partially intermediate fold spaces at end edges of the folds. The filter medium body has a lateral band adhesively connected to and covering the end edge face positioned at an angle relative to the inflow and outflow sides. The lateral band is connected to end edges of the folds at the end edge face and extends all the way to the inflow and outflow sides. The lateral band has at least one leg resting on the inflow side or the outflow side adjacent to a rim area of the filter medium body.

A filter for an HVAC system has a body formed entirely of an air-transmissive open-cell polymeric material. The body is of a generally rectangular configuration. The body has a plurality of cuts extending entirely through a thickness of the body from the top to the bottom of the body. The plurality of cuts define a plurality of cubical members frangibly connected together such that each of the plurality of cubical members is separable by hand from a remainder of the body such that an individual cubical member is removable along both a portion of a length and a portion of a width of the body.

A filter for an air conditioner has a body formed of an air-transmissive material. The body is of a generally rectangular configuration and has a top, bottom, a front, a back and a pair of sides. The body has a plurality of cuts formed through a thickness thereof. The plurality of cuts define a plurality of cubical or rectangular members frangibly connected together. The plurality of cubical or rectangular members are separable from a remainder of the body such that the body has a size suitable for being received within a filter-receiving receptacle of the air conditioner.