High efficiency permanent air filter and method of manufacture
AssigneeRick L. Chapman
InventorRick L. Chapman
Life of this patent
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Abstract
An air filter for use in residential and commercial heating and air conditioning systems including a laminated unit (100) having a filter media (102) where either side of the filter media (102) has a porous layer (104, 106) of passive electrostatic netting. The air filter has a corrugation configuration (142, 144) to increase the available surface area when compared to conventional flat filters.
Claims21
A washable air filter for filtering inlet air to a heating and/or air conditioning system comprising an assembly formed of:
- a deformable, non-electrostatic pad of a high-loft, air laid, resin bonded polymeric fibers having a high filtering efficiency for 10 micron and less particles and having a thickness from 0.05 to 0.45 inches and a density from 0.5 to 5 ounces per yard, said pad having a front surface and a rear surface;
- a layer of woven, porous, passive electrostatic fabric disposed on either side of the pad having an inside surface in contact with said surfaces, and having an outside surface;
- a deformable metal grill disposed in contact with the outside surfaces of the fabric;
- and
- said assembly having a pleated configuration in which the angle between adjacent wall surfaces of the pleats is from 20.degree. to 75.degree..
A method of manufacturing a washable filter for filtering inlet air flow to a heating and/or air conditioning system, comprising the steps of:
- placing a sheet of passive electrostatic netting woven from polyalkylene fibers in contact with the surfaces of a non-electrostatic pad of a high-loft, air laid, resin bonded, polymeric fibers having a thickness from 0.05 to 0.45 inch and a density from 0.5 to 5 ounces per yard and a high efficiency for 10 micron or less particles;
- placing a layer of porous metal in contact with the outer surfaces of the netting to form an assembly;
- and
- pleating said assembly to form pleats in which the angle between wall surfaces is from 20.degree. to 75.degree..
Dependencies are inferred from the claim text.