Patent EP0248925A1 successfully refreshed from Google Patents.
EP0248925A1
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EP
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Electrostatic dust collector
Assignee: DKK Co Ltd
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Filing: 1986-06-10
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Granted: —
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Expires: 2006-06-10
Abstract
Abstract An electrostatic dust collector is provided with an electrode unit including first (50) and second (52) electrodes arranged to oppose each other across a solid insulator (56) and having positive and negative potentials respectively applied thereto, the second electrode (52) being so disposed that a leading edge portion thereof is located at a position inwardly of a leading edge portion of the first electrode (50). A gas passageway (60) is formed on a side of the second electrode (52) opposite the first electrode (50), and an electrically conductive filter element (61) is arranged in the gas passageway (60) so as to be in contact with the second electrode (52). A gas (1) to be purified, such as air, is forcibly passed through the passageway (60) by motor-driven fan. The filter (61) consists of a material, such as steel wool, made up of a multiplicity fine fibers to provide a large surface area. Owing to its electrical contact with the second electrode (52), the filter element (61) traps airborne particles on the fine fibres by electrostatic induction.
Inventors
- 👤 Motoo Yanagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:37
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/60
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
An electrostatic dust collector for removing particles from a gas to be purified, comprising: an electrode unit (U₁, U₂) including a first electrode (50; 70; 90; 100, 104) a second electrode (52; 71; 91; 101, 103, 105) and a solid insulator (56; 72; 92; 102, 106) said first and second electrodes being arranged to oppose each other other across said solid insulator and having positive and negative potentials respectively applied thereto, said seconde electrode being so disposed that a leading edge portion thereof is located at a position inwardly of a leading edge portion of said first electrode; a gas passageway (60; 74; 95; 107, 108) formed on a side of said second electrode which is opposite said first electrode; an electrically conductive filter element (61, 62; 75; 96; 109, 110) arranged in said gas passageway so as to be in contact with said second electrode; and forcible gas passing means (82; 98; 111) for forcibly passing the gas to be purified through said gas passageway.
Claim 2
Dependent Claim
166 words
An electrostatic dust collector for removing particles from a gas to be purified, comprising: an electrode unit (U₁, U₂) including a first electrode (50; 70; 90; 100, 104) a second electrode (52; 71; 91; 101, 103, 105) and a solid insulator (56; 72; 92; 102, 106) said first and second electrodes being arranged to oppose each other other across said solid insulator and having positive and negative potentials respectively applied thereto, said seconde electrode being so disposed that a leading edge portion thereof is located at a position inwardly of a leading edge portion of said first electrode; a gas passageway (60; 74; 95; 107, 108) formed on a side of said second electrode which is opposite said first electrode; an electrically conductive filter element (61, 62; 75; 96; 109, 110) arranged in said gas passageway so as to be in contact with said second electrode; and forcible gas passing means (82; 98; 111) for forcibly passing the gas to be purified through said gas passageway.
Claim 3
Dependent Claim
47 words
The electrostatic dust collector according to claim 1, wherein a plurality of dust collecting units are juxtaposed in parallel, each dust collecting unit comprising said electrode unit (U₁, U₂), said gas passageway (60; 74; 95; 107, 108) and said filter element (61, 62; 75; 96; 109, 110).
Claim 4
Dependent Claim
62 words
The electrostatic dust collector according to claim 2, wherein said plurality of dust collecting units juxtaposed in parallel includes a dust collecting unit disposed on an inner side thereof, the first electrode (100) of said last-mentioned dust collecting unit being enclosed within said solid insulator (102), and the second electrode (102, 103) being arranged on both sides of said solid insulator (102).
Claim 5
Dependent Claim
30 words
The electrostatic dust collector according to claim 1 or 2, wherein said first (50; 70) and second electrodes (52; 71) are flat plates arranged to lie parallel to each other.
Claim 6
Dependent Claim
29 words
The electrostatic dust collector according to claim 1 or 3 wherein said first (90; 100, 104) and second electrodes (91; 101, 103, 105) are cylinders arranged in coaxial relation.
Claim 7
Dependent Claim
42 words
The electrostatic dust collector according to any of claims 1 to 5, wherein said filter element (61, 62; 75; 96; 109, 110) is shaped in advance so as to conform to the shape of said gas passageway (60; 74; 95; 107, 108).
Claim 8
Dependent Claim
23 words
The electrostatic dust collector according to any of claims 1 to 6, wherein said filter element comprises metallic wool prefereably made of steel.
Claim 9
Dependent Claim
40 words
The electrostatic dust collector according to any of claims 1 to 7 wherein said forcible air passing means (82; 98; 111) is a motor driven fan provided at a rearmost portion of said gas passageway (60; 74; 95; 107, 108).
Claim 10
Dependent Claim
43 words
The electrostatic dust collector according to any of claims 1 to 8 further comprising a prefilter (76) provided at a forward portion of said gas passageway (74) and/or an activated carbon filter (78) provided at a rearward portion of said gas passageway (76).
Claim 11
Dependent Claim
28 words
The electrostatic dust collector according to any of claims 1 to 9, wherein said solid insulator (57; 72; 92; 102, 106) comprises a ceramic or an epoxy resin.
Claim 12
Dependent Claim
47 words
The electrostatic dust collector according to any of claims 1 to 10, wherein a leading edge portion of the second electrode (52; 71; 91) 101, 103, 105) is located at a portion inwardly of a leading edge portion of the first electrode (50; 70; 90; 100, 102)
References Cited (Backward Citations)
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