CA2545965A1 - Electrically enhanced air filtration with improved efficacy - Google Patents

Electrically enhanced air filtration with improved efficacy Download PDF

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Publication number
CA2545965A1
CA2545965A1 CA002545965A CA2545965A CA2545965A1 CA 2545965 A1 CA2545965 A1 CA 2545965A1 CA 002545965 A CA002545965 A CA 002545965A CA 2545965 A CA2545965 A CA 2545965A CA 2545965 A1 CA2545965 A1 CA 2545965A1
Authority
CA
Canada
Prior art keywords
filter media
conductive electrode
fibrous filter
fibrous
media
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002545965A
Other languages
French (fr)
Other versions
CA2545965C (en
Inventor
Rex Coppom
Sven Coppom
Brian Coppom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
StrionAir Inc
Original Assignee
Strionair, Inc.
Rex Coppom
Sven Coppom
Brian Coppom
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Strionair, Inc., Rex Coppom, Sven Coppom, Brian Coppom filed Critical Strionair, Inc.
Publication of CA2545965A1 publication Critical patent/CA2545965A1/en
Application granted granted Critical
Publication of CA2545965C publication Critical patent/CA2545965C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02Plant or installations having external electricity supply
    • B03C3/04Plant or installations having external electricity supply dry type
    • B03C3/09Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02Plant or installations having external electricity supply
    • B03C3/04Plant or installations having external electricity supply dry type
    • B03C3/14Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155Filtration
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/48Processes of making filters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00Gas separation
    • Y10S55/05Methods of making filter

Abstract

A filter assembly particularly useful in electronically enhanced air cleaning systems including a fibrous filter media. A conductive electrode is affixed to the fibrous filter media, so that the conductive electrode makes physical contact to the fibrous filter media in a plurality of substantially planar locations. The conductive electrode is coupled to a potential that enables neutralizing charge that accumulates on the filter media during operation to be removed thereby maintaining high efficiency.

Claims (24)

1. A filter assembly comprising:
a fibrous filter media; and a conductive electrode affixed to the fibrous filter media, wherein the conductive electrode makes physical contact to the fibrous filter media in a plurality of substantially planar locations.
2. The filter assembly of claim 1 wherein the fibrous filter media comprises a pleated fabric.
3. The filter assembly of claim 1 wherein the fibrous filter media comprises a plurality of parallel pleats defining pleat tips on one surface and wherein the conductive electrode physically contacts the fibrous filter media at the pleat tips.
4. The filter assembly of claim 1 wherein the conductive electrode is substantially planar.
5. The filter assembly of claim 1 wherein the conductive electrode deviates no more than one millimeter variance from planar.
6. The filter assembly of claim 1 wherein the fibrous filter media is substantially nonconductive.
7. The filter assembly of claim 1 wherein the fibrous filter comprise:
a pleated fabric having a plurality of plurality of parallel pleats;
a plurality of glue beads running in a direction non-parallel with respect to the pleats, wherein the glue beads form a protrusion when crossing a pleat tip; and wherein the conductive electrode is affixed to the fibrous filter by the protrusion of the glue bead.
8. The filter assembly of claim 7 wherein the glue bead is substantially non-conductive.
9. The filter assembly of claim 1 further comprising a supporting frame surrounding the fibrous filter media and exposing an upstream surface and a downstream surface of the fibrous filter media, wherein the conductive electrode is affixed to contact only certain points of the downstream surface of the fibrous filter media.
10. The filter assembly of claim 1 wherein the filter assembly is disposable.
11. The filter assembly of claim 1 wherein the conductive electrode makes sufficient physical contact to the fibrous filter media to collect electrical charge imparted anywhere on the fibrous filter media.
12. A method for making a filter media assembly comprising:
providing a fibrous filter media;
affixing a substantially planar conductive electrode to the fibrous filter media such that the conductive electrode physically contacts the fibrous filter media at a plurality of locations.
13. The method of claim 12 further comprising:
pleating the fibrous filter media using a glue bead to stabilize the pleats, wherein the act of affixing the conductive electrode comprises using the glue bead to affixing the conductive electrode.
14. The method of claim 12 wherein the fibrous filter media comprises a pleated media having a glue bead running across and intersecting tips of pleats, and the method further comprises:
heating the glue bead; and pressing the conductive electrode into the heated glue bead to affix the conductive electrode to the pleated media.
15. A filter assembly made according to the method of claim 12.
16. An air filtration system including a filter assembly made by the method of claim 12.
17. An air filtration system comprising:
a blower;
a fibrous filter media;
a conductive electrode affixed to the fibrous filter media, wherein the conductive electrode makes physical contact to the fibrous filter media in a plurality of substantially planar locations; and an electrical connection coupling the conductive electrode and a voltage source.
18. The air filtration system of claim 17 wherein the conductive electrode makes sufficient physical contact to the fibrous filter media so as to collect charge imparted on the fibrous filter media.
19. The air filtration system of claim 17 further comprising an upstream electrode.
20. The air filtration system of claim 17 further comprising an upstream pre-charge unit.
21. The air filtration system of claim 17 further comprising wherein the filter media is substantially non-conductive.
22. The air filtration system of claim 17 further comprising wherein the conductive electrode is substantially planar.
23. A method for removing particulates from air comprising:
directing air flow through a filter media;
establishing a substantially uniform electric field across the filter media;
collecting particles on the filter media, whereby charge in a collected particle is distributed to the filter media;
collecting the charge from the filter media using an electrode that is physically coupled to the filter media; and conducting the collected charge to a power supply or ground or opposite polarity.
24. A device, comprising an electrically enhanced air filter, the device comprising:
a functional unit configured to perform a specific function using purified air;
an electrically enhanced air filter positioned upstream of an airflow to the functional unit, the electrically enhanced air filter comprising:
a fibrous filter media;
a conductive electrode affixed to the fibrous filter media, wherein the conductive electrode makes physical contact to the fibrous filter media in a plurality of substantially planar locations; and an electrical connection coupling the conductive electrode and a voltage source or ground.
CA2545965A 2003-11-25 2004-02-05 Electrically enhanced air filtration with improved efficacy Expired - Fee Related CA2545965C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/721,940 US7025806B2 (en) 2003-11-25 2003-11-25 Electrically enhanced air filtration with improved efficacy
US10/721,940 2003-11-25
PCT/US2004/003295 WO2005061115A1 (en) 2003-11-25 2004-02-05 Electrically enhanced air filtration with improved efficacy

Publications (2)

Publication Number Publication Date
CA2545965A1 true CA2545965A1 (en) 2005-07-07
CA2545965C CA2545965C (en) 2011-08-02

Family

ID=34591923

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2545965A Expired - Fee Related CA2545965C (en) 2003-11-25 2004-02-05 Electrically enhanced air filtration with improved efficacy

Country Status (6)

Country Link
US (2) US7025806B2 (en)
EP (1) EP1691930B1 (en)
JP (1) JP4927558B2 (en)
CN (2) CN103418191B (en)
CA (1) CA2545965C (en)
WO (1) WO2005061115A1 (en)

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EP1691930A1 (en) 2006-08-23
US20060180023A1 (en) 2006-08-17
EP1691930A4 (en) 2008-08-27
JP2007512131A (en) 2007-05-17
CN103418191B (en) 2016-08-10
JP4927558B2 (en) 2012-05-09
US20050109204A1 (en) 2005-05-26
CN1886199A (en) 2006-12-27
US7025806B2 (en) 2006-04-11
WO2005061115A1 (en) 2005-07-07
EP1691930B1 (en) 2013-12-25
CA2545965C (en) 2011-08-02
US7513933B2 (en) 2009-04-07

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