A filter media and methods are provided. The media is stretchable and exhibits a high degree of elongation which thereby extends its surface area during pleating. By extending surface area of media during pleating, the initial differential pressure is lowered as the area of media is stretched while keeping the same efficiency range with a compressed thickness of media on the affected area.

A device for dehumidifying a column of air has a frame has an outer frame; the outer frame having an outer wall. An inner frame having an inner frame wall is disposed on the frame, spaced from the outer wall at an interior of the outer wall. A channel is formed between the outer wall and inner frame wall. A front panel, formed as a grid, is disposed on the outer wall and is coextensive with the frame. A back panel, formed as a grid, is disposed on an opposed side of the outer frame wall, from the front and is coextensive with the frame. Each grid has sufficient openings therein so as not to significantly impede the flow of air through the device from the front panel to the back panel. An air filter medium is disposed within the space defined by the inner frame wall. A desiccant is disposed within the channel.

A human-activity-environment air-purifying apparatus is provided that draws in airflow from an ambient environment, kills germs in the airflow within the apparatus and expels purified airflow back into the environment. The apparatus has a housing with an interior chamber. An airflow enters the chamber through an inlet. From the interior chamber, the airflow is expelled through an outlet. The apparatus has a germ-killing-system that kills germs in the airflow and has an airflow-generator which causes the airflow to flow from the inlet to the outlet. In one aspect, the apparatus has a three-dimensional filter structure that has air-filter-surfaces that define a filter interior region and encompassed by the air-filter-surfaces of the filter structure. The filter is positioned in connection with the inlet so that airflow entering the inlet is dispersed into the housing interior chamber in multiple directions exclusively through the air-filter-surfaces of the three-dimensional filter structure.

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 members frangibly connected together. The plurality of cubical 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.

A multilayer filter screen and the manufacturing method thereof are provided. The multilayer filter screen includes a conductive powder layer and a plastic powder layer. The conductive powder layer and the plastic powder layer are stacked up through a solidifying process. Therefore, the mechanical structural strength and the anti-static electricity function of the multilayer filter screen are improved.

A surface cleaning apparatus includes an air flow path, a filter housing, and a filter member in the filter housing. In some embodiments, the filter member includes a plurality of individual filter elements arranged in parallel, each including porous filter material having at least one upstream face and at least one portion defining a porous filter media air outlet. In other embodiments, the filter member has an outer upstream surface that abuts an axially extending air impermeable wall to inhibit bypass of the filter.

An air filter comprising a filter casing defining an air passage from a first opening to a second opening in the filter casing, at least one filter element arranged in the air passage of the filter casing, such that air passing between the first opening and the second opening must pass through the at least one filter element, characterized in that said filter casing is manufactured with at least one sealed access port integrated in the filter casing, wherein said at least one sealed access port can be unsealed to provide an access to the air passage from outside the filter casing.

A vehicle comprising at least one filter for trapping particles in a vehicle's outside surrounding air. The filter comprises a first part and a second part. The first part comprises a first cilia layer. An air inlet is arranged in one end of the filter. The first cilia layer is arranged to trap at least some particles in the air flowing into the filter via the air inlet when the first cilia layer is electrostatically charged by an electromagnetic field. The filter is connected to a vehicle chassis and such that one of the first and second parts faces the vehicle chassis and the other part faces ground.

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.

A human-activity-environment air-purifying apparatus is provided that draws in airflow from an ambient environment, kills germs in the airflow within the apparatus and expels purified airflow back into the environment. The apparatus has a housing with an interior chamber. An airflow enters the chamber through an inlet. From the interior chamber, the airflow is expelled through an outlet. The apparatus has a germ-killing-system that kills germs in the airflow and has an airflow-generator which causes the airflow to flow from the inlet to the outlet. In one aspect, the apparatus has a three-dimensional filter structure that has air-filter-surfaces that define a filter interior region and encompassed by the air-filter-surfaces of the filter structure. The filter is positioned in connection with the inlet so that airflow entering the inlet is dispersed into the housing interior chamber in multiple directions exclusively through the air-filter-surfaces of the three-dimensional filter structure.