Active field polarized media air cleaner

• US 8,814,994 B2
• Filed: 12/06/2011
• Issued: 08/26/2014
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Environmental Management Confederation, Inc.
• Original Assignee: Environmental Management Confederation, Inc.
• Inventors: Wiser, Forwood C., Summers, George R., Kaeppner, Benjamin H.
• Primary Examiner(s): Smith, Duane
• Assistant Examiner(s): Turner, Sonji
• Application Number:
  US13/312,089
• Publication Number:
  US 20120260803A1
• Time in Patent Office: 994 Days
• Field of Search: 96/66, 96/67, 96/69, 96/83, 96/84, 96/88, 96/96, 96/99, 554/95, 554/97, 555/01, 555/03, 555/06, 55D/IG.31
• 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 46/121 V-type arrangements
• 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: B03C 3/70 insulating in electric separators B03C3/53 takes precedence

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. In an active field polarized media air cleaner, said active field polarized media air cleaner comprising 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 comprising:

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

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

a contact attached to said center screen, said contact positioned so as to contact said high-voltage probe, 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

wherein one of the screens comprises a plastic netting.

2. The active field polarized media air cleaner of claim 1, further comprising a conductive disk disposed on the shank of said fastener, said conductive disc being in contact with said center screen.

3. The active field polarized media air cleaner of claim 1, further comprising a second insulating shield attached to said second conductive outer screen, said second insulating shield disposed opposite said first insulating shield.

4. The active field polarized media air cleaner of claim 1, wherein the plastic netting is extruded.

5. The active field polarized media air cleaner of claim 1, wherein the plastic netting comprises fire retardant materials.

6. The active field polarized media air cleaner of claim 1, wherein the plastic netting is substantially free of sharp edges.

7. The active field polarized media air cleaner of claim 1, wherein the plastic netting comprises LDPE.