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US 5,573,577 AGranted
Ionizing and polarizing electronic air filter
OwnerConstantinos J. Joannouinventor
Life of this patent
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Abstract
A high efficiency electronic air filter is disclosed in which pads of dielectric fibres are sandwiched between electrically charged, ionizing elements and grounded screens. The ionizing elements charge the dust particles passing through the filter and at the same time polarize the fibrous pads. In this way, the charged particles are attracted and collected on the fibrous pads with improved efficiency.
Claims13
An ionizing apparatus comprising an air filter having:
- (a) a conducting screen;
- (b) a fibrous pad of non-conducting, dielectric material having first and second sides and positioned with the first of its sides adjacent said screen;
- (c) an electrical coupling means for receiving an electric potential from a high voltage source;
- and
- (d) a polarizing and ionizing element located adjacent to and in contact with the second side of the fibrous pad, opposite the screen,
- said polarizing and ionizing element comprising an electrically conductive filament having multiple, exposed filament ends distributed along its length for providing a high potential gradient to ionize particle components of a gas passing therethrough, said conducting screen and said polarizing and ionizing element being connected to the electrical coupling means to produce said high potential gradient and to polarize the fibrous pad to trap said ionized particulate components when supplied with charge from a high voltage source through said electrical coupling means.
3 more elements
A filter cartridge for use in an ionizing air filter comprising:
- (a) first and second pads of fibrous, non-conducting, dielectric material each having inner and outer sides, said inner sides being juxtaposed to each other;
- (b) a conductive path provided with the first of said pads on the inner side of said pad;
- and
- (c) electrical coupling means attached to said conductive path for receiving an electrical potential from a high voltage source,
- the conductive path comprising a conductive filament having multiple, exposed filament ends distributed along its length to form, when electrically charged to an ionizing potential, an electrical gradient that produces ionization in air that surrounds said filament.
2 more elements
Dependencies are inferred from the claim text.