An air filtering apparatus 1 comprises a plurality of filter surfaces (10, Fig 3), wherein each filter surface comprises a fan 5, such as a propeller associated with the filter surface and arranged in use to cause air to pass over or through the filter surface. At least some of the plurality of fans are operable to generate sufficient lift to cause the apparatus to become airborne. Preferably the plurality of filter surfaces are located in a circular housing 2a 2h, and the housing may be concentric with a respective fan. A filter surface may comprise an activated carbon surface. A method of filtering a volume of contaminated air comprising directing one or more of the filtering apparatuses into a volume of contaminated air is also disclosed. The apparatus may be used to remove contamination from industrial environments, is inexpensive to install and allows localised contaminated areas to be quickly and effectively cleaned of contamination.
Air purification
2018-11-14
Patent
Electronic Resource
English
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