Active field polarized media air cleaner

• US 8,070,861 B2
• Filed: 03/26/2010
• Issued: 12/06/2011
• 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): Chiesa, Richard L
• Application Number:
  US12/732,601
• Publication Number:
  US 20100326279A1
• Time in Patent Office: 620 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 46/50 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. 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; and

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.

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 being in contact with said center screen.

3. A combination in accordance with 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.