Electrostatic particle filtration
First Claim
Patent Images
1. A filter comprising:
- a) electrically conductive filaments, said filaments being electrically insulated from one another at least in part by a layer of solid flexible non-porous electrically insulating material borne about the circumference of each filament;
b) circuitry for applying an electrical potential difference in the range of 0.5 volts to 500 volts between said filaments to create an electrical field sufficiently strong to attract dust particles for capture on said filaments, andc) said filaments being arranged to form a mesh wherein the insulation of an insulated filament of one electrical potential substantially touches the insulation of an insulated filament of another electrical potential.
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Abstract
An on board electrostatic filter for a vacuum cleaner is disclosed. The filter includes a pair of conductive filaments insulated from one another and disposed close together in a substantially parallel, side-by-side relationship. Circuitry is provided for applying an electrical potential difference between the two conductors. This dual filament conductor is preferably packed into a relatively small volume in a tortuous configuration, to form a random mesh, or can be oriented in a more regular serpentine configuration. Other embodiments describe the mesh electrostatic filter to purify air in an HVAC system.
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Citations
12 Claims
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1. A filter comprising:
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a) electrically conductive filaments, said filaments being electrically insulated from one another at least in part by a layer of solid flexible non-porous electrically insulating material borne about the circumference of each filament; b) circuitry for applying an electrical potential difference in the range of 0.5 volts to 500 volts between said filaments to create an electrical field sufficiently strong to attract dust particles for capture on said filaments, and c) said filaments being arranged to form a mesh wherein the insulation of an insulated filament of one electrical potential substantially touches the insulation of an insulated filament of another electrical potential. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A filter comprising:
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a) electrically conductive filaments, said filaments being electrically insulated from one another at least in part by dual layer flexible non-porous polyamide insulation about the circumference of each filament; b) circuitry for applying an electrical potential difference between said filaments to create an electrical field sufficiently strong to attract dust particles for capture on said filaments, and c) said filaments being arranged to form a mesh wherein the insulation of an insulated filament of one electrical potential substantially touches the insulation of an insulated filament of another electrical potential. - View Dependent Claims (8, 9, 10)
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11. A filter comprising:
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a) electrically conductive filaments, said filaments being electrically insulated from one another by a substantially uniformly thick layer of solid electrically insulating material borne about the circumference of each filament; b) circuitry for applying an electrical potential difference in the range of 0.5 volts to 500 volts between said filaments to create an electrical field sufficiently strong to attract dust particles for capture on said filaments, and c) said filaments being arranged to form a mesh wherein the insulation of an insulated filament of one electrical potential substantially touches the insulation of an insulated filament of another electrical potential.
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12. A filter comprising:
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a) electrically conductive filaments, said filaments being electrically insulated from one another at least in part by a layer of solid flexible electrically insulating material borne about the circumference of each filament, said filaments being separated by a distance of less than the diameter of a filament; b) circuitry for applying an electrical potential difference in the range of 0.5 volts to 500 volts between said filaments to create an electrical field sufficiently strong to attract dust particles for capture on said filaments; and c) said filaments being arranged to form a mesh wherein the insulation of an insulated filament of one electrical potential substantially touches the insulation of an insulated filament of another electrical potential.
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Specification