Electrostatic precipitator

Inventor: Takaaki Hasegawa (Kawasaki, JP)

Assignee: Creative Technology Corporation

B03C3/41 B03C3/04 B03C3/47 B03C3/64 B03C3/70 H01T19/04 B03C2201/06

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Quick Facts

Patent No.: US 12,551,902
App. No.: 17/788,795
Granted: Feb 17, 2026
Kind: B2

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Abstract

An electrostatic precipitator is disclosed. The electrostatic precipitator includes an ionization unit configured to generate ions and a dust collection unit configured to electrically collect dust to which the ions are attached. The ionization unit is an ionizer that applies a predetermined voltage to an electrode needle to cause a corona discharge to generate the ions having the same polarity as a polarity of the applied voltage. The dust collection unit includes a high-voltage electrode disposed having a plurality of gaps for passing the dust to which the ions are attached, and a dust collection board disposed at a rear stage of the high-voltage electrode. A polarity of the voltage applied to the electrode needle of the ionization unit and the polarity of the voltage applied to the high-voltage electrode are set to the same polarity.

Claims (53)

1 . An electrostatic precipitator comprising:

an ionization unit configured to generate ions; and

a dust collection unit configured to electrically collect dust to which the ions are attached,

wherein the ionization unit includes an ionizer that applies a predetermined voltage to an electrode needle to cause a corona discharge to generate the ions having the same polarity as a polarity of the applied voltage,

wherein the dust collection unit includes:

a high-voltage electrode disposed at a rear stage of the ionization unit, having a plurality of gaps for passing the dust to which the ions are attached, and applied with a predetermined voltage; and a dust collection board disposed at a rear stage of the high-voltage electrode and applied with a voltage having a polarity opposite to a polarity of the voltage applied to the high-voltage electrode to electrically adsorb the dust to which the ions are attached,

wherein a polarity of the voltage applied to the electrode needle of the ionization unit and the polarity of the voltage applied to the high-voltage electrode are set to the same polarity,

wherein the high-voltage electrode of the dust collection unit is formed by a plurality of linear conductors arranged in parallel at a predetermined interval and each coated with an insulator,

wherein the dust collection board of the dust collection unit is provided with a conductor and an insulating resin film coating the conductor, and the dust collection board is a flat plate including a face closed in a dust collecting direction, and

wherein the dust collection board is disposed in such a manner that the face and a longitudinal direction of the linear conductors cross the dust collecting direction.

2 . The electrostatic precipitator according to claim 1 ,

wherein a volume resistivity of the resin film is set in a range of 10 10 Ω·cm to 10 13 Ω·cm, a thickness thereof is set to about 0.1 mm, and the distance from the ionization unit to the dust collection board of the dust collection unit is set to 100 mm or less.

3 . The electrostatic precipitator according to claim 1 ,

wherein a distance between the plurality of linear conductors forming the high-voltage electrode is set within a range of 40 mm to 100 mm,

wherein a distance between the high-voltage electrode formed by the plurality of linear conductors and the dust collection board is set within a range of 10 mm to 80 mm, and

wherein a distance from the electrode needle of the ionization unit to the dust collection board of the dust collection unit is set within a range of 30 mm to 100 mm.

4 . The electrostatic precipitator according to claim 1 ,

wherein the ionizer is a direct current ionizer that generates ions by applying a direct current voltage, and

wherein the voltages applied to the high-voltage electrode and the dust collection board are direct current voltages having opposite polarities.

5 . The electrostatic precipitator according to claim 2 ,

wherein a distance between the plurality of linear conductors forming the high-voltage electrode is set within a range of 40 mm to 100 mm,

wherein a distance between the high-voltage electrode formed by the plurality of linear conductors and the dust collection board is set within a range of 10 mm to 80 mm, and

wherein a distance from the electrode needle of the ionization unit to the dust collection board of the dust collection unit is set within a range of 30 mm to 100 mm.

6 . The electrostatic precipitator according to claim 2 ,

wherein the ionizer is a direct current ionizer that generates ions by applying a direct current voltage, and

wherein the voltages applied to the high-voltage electrode and the dust collection board are direct current voltages having opposite polarities.

7 . The electrostatic precipitator according to claim 3 ,

wherein the ionizer is a direct current ionizer that generates ions by applying a direct current voltage, and

wherein the voltages applied to the high-voltage electrode and the dust collection board are direct current voltages having opposite polarities.

8 . The electrostatic precipitator according to claim 5 ,

wherein the ionizer is a direct current ionizer that generates ions by applying a direct current voltage, and

wherein the voltages applied to the high-voltage electrode and the dust collection board are direct current voltages having opposite polarities.

9 . The electrostatic precipitator according to claim 4 ,

wherein the ionizer is a direct current ionizer that generates ions by applying a direct current voltage, and

wherein the voltages applied to the high-voltage electrode and the dust collection board are direct current voltages having opposite polarities.

10 . An electrostatic precipitator according to claim 1 ,