ACTIVE FIELD POLARIZED MEDIA AIR CLEANER

• US 20100326279A1
• Filed: 03/26/2010
• Published: 12/30/2010
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Environmental Management Confederation, Inc.
• Original Assignee: Environmental Management Confederation, Inc.
• Inventors: Summers, George R., Wiser, Forwood C., Kaeppner, Benjamin H.
• Granted Patent: US 8,070,861 B2
• Time in Patent Office: Days
• US Class Current: 96/66
• CPC Class Codes: B01D 46/0032 using electrostatic forces to remove particles, e.g. electret filters
• CPC Class Codes: B01D 46/50 Means for discharging electrostatic potential
• CPC Class Codes: B03C 2201/28 Parts being designed to be removed for cleaning purposes
• CPC Class Codes: B03C 3/366 located in the filter, e.g. special shape of the electrodes
• CPC Class Codes: Y10S 55/31 Filter frame

Abstract

Improvements in active field polarized media air cleaner include an aerodynamic front cowling to reduce static air resistance, a rear double hinge to reduce blow by, a resistive center screen permitting the sharing of high voltage power supplies while reducing the tendency to arc and allowing for a higher operational voltage, a dielectric media support frame to produce a more uniform electrostatic field and reduce blow by, while at the same time reducing the tendency to spray corona and/or arc at the edges of the center screen, a substantially flat conductive outer screen to produce a more uniform electrostatic field throughout the filter media and a high-voltage shield to reduce high-voltage arcing and the spraying of corona where the high-voltage probe contacts the center screen.

Claims

1. An active field polarized media air cleaner, said active field polarized media air cleaner comprising:

a first pad of dielectric filter material;

a second pad of dielectric filter material;

a center screen disposed between said first and second pads of dielectric material;

a first conductive outer screen of sufficiently rigid material so as to lie substantially flat when placed against said first pad of dielectric filter material;

a first conductive holding frame for holding said first conductive outer screen;

a second conductive outer screen of sufficiently rigid material so as to lie substantially flat when placed against said second pad of dielectric filter material;

a second conductive holding frame for holding said second conductive outer screen;

said first and second conductive holding frames being disposed substantially parallel to each other on either side of said first and second pads of dielectric filter material, whereby said first and second conductive outer screens are substantially flat and substantially parallel to each other.

2. An active field polarized media air cleaner in accordance with claim 1 wherein said first and second conductive outer screens each comprise a perforated sheet of solid material.

4. A combination in accordance with claim 2, wherein said high-voltage probe comprises a spring contact.

3. In an active field polarized media air cleaner, said active field polarized media air cleaner comprising in combination a first conductive outer screen, a first pad of dielectric filter material, a center screen, a second pad of dielectric filter material, and a second conductive outer screen, an improvement comprising:

a high-voltage probe passing through said conductive outer screen; and

an insulating shield attached to said first conductive outer screen, said insulating shield surrounding said high-voltage probe.

5. A combination in accordance with claim 3, further comprising a contact attached to said center screen, said contact positioned so as to contact said high-voltage probe.

6. A combination in accordance with claim 5, wherein said contact comprises:

a fastener having a head and a shank, said shank passing through said center screen, said head of said fastener being in contact with said high-voltage probe.

7. A combination in accordance with claim 6, further comprising a metallic disk disposed on the shank of said fastener, said metallic disk being in contact with said center screen.

8. A combination in accordance with claim 3, further comprising a second insulating shield attached to said second conductive outer screen, said second insulating shield disposed opposite said first insulating shield.