Air filter cartridges are disclosed. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.

According to the present disclosure, air cleaner assemblies, components, features, and methods relating thereto, are described. These features, in part, relate to configuration of a preferred seal arrangement and seal surface of the cartridge. Particular arrangements are shown, in which: the filter cartridge includes a seal arrangement having a axial pinch seal surface with a projection/recess contour including at least one projection thereon; and, the cartridge includes a seal contour projection stabilizing portion at a location in perimeter alignment with the portion of the seal pinch arrangement including the first housing engagement projection. Additional features are included that relate to clean air separator section tubes of a precleaner arrangement secured to a cartridge. These features can be used in cartridges including features outlined above, or in alternative cartridges. Additional features of air cleaner arrangements and filter cartridges in accord with the above are described.

A surface cleaning apparatus having an air flow path from a dirty air inlet to a clean air outlet and including an air treatment member, a suction motor and a filter assembly in the air flow path. The filter assembly includes at least two spaced apart physical filter elements with the upstream face of the second filter facing the downstream face of the first filter element. The filter assembly is configured to prevent air from bypassing the first physical filter media. The filter assembly includes a gap between the first filter element and the second filter element that acts as a header and reduces the flow rate of air incident on the second filter element.

This invention is a smart face mask for air filtration with a transparent mouth-covering portion, an active air filtration system which filters both air inflow and air outflow, an environmental or biometric sensor, and a smart control mechanism wherein the operation of the active air filtration system is automatically adjusted based on analysis of data from the sensor.

Filter cartridge arrangements, features thereof and assembly for use therewith, are provided. Selected filter cartridge features are disclosed. Methods of assembly and systems for use are described.

A filter unit (300) includes: a chassis (303) that has a suction portion (301) provided at a front side thereof, has an exhaust portion (302) provided at a rear side thereof, and is provided internally with an upstream filter (331); a plurality of upstream first ribs (323) disposed parallel to sidewalls of the chassis (303) to rise from a bottom surface (322) of the chassis (303) and forming an upstream first airflow path (P11); a plurality of upstream second ribs (313) disposed parallel to the sidewalls of the chassis (303) to rise from a ceiling surface (312) of the chassis (303) and forming an upstream second airflow path (P21); an upstream first shield plate (315) raised from the ceiling surface (312) to cover up a front of the upstream filter (331) while forming an upstream first gap (S11) with the bottom surface (322); and an upstream second shield plate (325) raised from the bottom surface (322) to cover up a rear of the upstream filter (331) while forming an upstream second gap (S21) with the ceiling surface (312).

The present specification described a room air management system for reducing or preventing exposure to and inhalation of infected aerosol to individuals in a room, which employs filtration, purification, and sterilization techniques using physical filtration, UV sterilization, and/or photocatalytic filtration. In embodiments, the systems of the present specification may be of different sizes to accommodate differently-sized rooms. In embodiments, the system of the present specification is a stand-alone unit. In embodiments, the system of the present specification is a wall mountable air handler unit. In embodiments, the system of the present specification provides UV-C exposure to air and is capable of killing virus particles. The system of the present specification is designed such that it is user-friendly and easy to operate.

Presented is a portable hand held e-cigarette shaped oxygen generator and air purifier. The device includes a suction body through which atmospheric air is forcibly introduced within a main body of the device during respiration, a solid oxygen filter adapted for holding solid oxygen, and a solid oxygen filter support having a dual cylindrical structure for housing and supporting the solid oxygen filter. The device further includes a solid oxygen filter support lid mountable over the solid oxygen filter support and is adapted for discharging device generated inhalable oxygen from the main body to a micro filter, a casing embodying the micro filter and operationally connected to a mouthpiece having an extension for mounting a straw. The atmospheric air introduced in the device reacts with the solid oxygen to generate inhalable oxygen after passing the atmospheric air through the dual cylindrical structure of the solid oxygen filter support.

Filter media comprising adsorptive particles are generally described. In some embodiments, the adsorptive particles are present in a relatively large amount, in a layer discrete from one or more other layers and/or fiber webs also present in the filter media, and/or in a layer that comprises a relatively low amount of fibers. In some embodiments, the filter media further comprises a non-woven fiber web comprising fibers with relatively small diameters.

In order to provide a filter system for separating off contaminants from a stream of untreated gas that contains contaminants that is of simple construction and is operable efficiently, it is proposed that the filter system should include the following: a base construction through which the stream of untreated gas is guidable and which includes at least one filter module receptacle for receiving at least one filter module, and at least one filter module which is selectively arrangeable on and/or in the at least one filter module receptacle and/or removable therefrom, wherein the at least one filter module includes a plurality of filter element receptacles for receiving a plurality of mutually independent filter elements.