Electrostatic air filter
AssigneeArgonide Corporation
InventorsFrederick Tepper, Leonid A. Kaledin
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Abstract
The invention is a filter for gaseous media in which nano alumina fibers and second fibers are arranged in a matrix to create asymmetrical pores. The filter is a high efficiency, high capacity particulate filter that intercepts pathogens and other particulate matter from gaseous media, including vapor-suspended particles. The new filter has an improved retention of water-aerosolized particles as compared to conventional HEPA filters and may be used as a pre-filter that extends the life of HEPA filters by about five to ten times. The invention is also a method of manufacturing and using the filter.
Claims44
A filter for gaseous media, said filter comprising:
- (a) nano alumina fibers;
- and
- (b) second fibers mixed with said nano alumina fibers, said second fibers arranged to define a plurality of asymmetrical pores, said pores having an average pore size that is greater than about 10 μm and capable of retaining particles having a dimension that is at least one order of magnitude smaller than said average pore size.
A method of manufacturing a filter, said method comprising the steps of:
- a. forming nano alumina fibers;
- and
- b. mixing second fibers with said nano alumina fibers in the presence of said second fibers to define a plurality of asymmetrical pores, said pores having an average pore size that is greater than about 10 μm and capable of retaining particles having a diameter that is at least one order of magnitude smaller than said average pore size.
A method of filtering a gaseous medium, said method comprising the steps of:
- a. passing a gaseous medium through a filter comprising a plurality of nano alumina fibers mixed with a plurality of second fibers to define a plurality of asymmetrical pores, said pores having an average pore size that is greater than about 10 μm;
- and
- b. retaining a plurality of particles from said gaseous medium, said particles having dimension that is about an order of magnitude smaller than said average pore size.
A method of manufacturing a filter, said method comprising the steps of:
- a. forming nano alumina fibers;
- and
- b. arranging a plurality of second fibers in a matrix with said nano alumina fibers to create a plurality of asymmetric pores into which said nano alumina fibers are dispersed, said pores each having an average pore size that greater than about 10 μm.
Dependencies are inferred from the claim text.