CA2545965A1 - Electrically enhanced air filtration with improved efficacy - Google Patents
Electrically enhanced air filtration with improved efficacy Download PDFInfo
- 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
Links
- 238000001914 filtration Methods 0.000 title claims 8
- 239000011324 bead Substances 0.000 claims 9
- 239000003292 glue Substances 0.000 claims 9
- 238000000034 method Methods 0.000 claims 7
- 238000011144 upstream manufacturing Methods 0.000 claims 4
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 2
- 239000002245 particle Substances 0.000 claims 2
- 230000005684 electric field Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/09—Plant 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
- B03C3/155—Filtration
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/48—Processes of making filters
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/05—Methods 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.
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.
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.
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.
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.
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.
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.
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.
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.
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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- 2004-02-05 CN CN201310274510.3A patent/CN103418191B/en not_active Expired - Fee Related
- 2004-02-05 CN CN200480034674.8A patent/CN1886199A/en active Pending
- 2004-02-05 EP EP04708539.4A patent/EP1691930B1/en not_active Expired - Lifetime
- 2004-02-05 WO PCT/US2004/003295 patent/WO2005061115A1/en not_active Application Discontinuation
- 2004-02-05 CA CA2545965A patent/CA2545965C/en not_active Expired - Fee Related
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2006
- 2006-04-11 US US11/401,588 patent/US7513933B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10568647B2 (en) | 2015-06-25 | 2020-02-25 | Biomet Manufacturing, Llc | Patient-specific humeral guide designs |
Also Published As
Publication number | Publication date |
---|---|
CN103418191A (en) | 2013-12-04 |
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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