Electrostatic precipitator

1. An electrostatic precipitator comprising:

a first high voltage generator configured to generate a first high voltage and a reference voltage;

a second high voltage generator configured to generate a second high voltage;

a charger including:

a first high voltage electrode configured to receive the first high voltage, and

a counter electrode configured to receive the reference voltage,

wherein the charger is configured to charge suspended particles by generating a discharge between the first high voltage electrode and the counter electrode; and

a dust collector disposed in a downstream side of an air flow direction of the charger including:

a second high voltage electrode, and

a ground electrode,

wherein the second high voltage is applied between the second high voltage electrode and the ground electrode, so that the dust collector collects the suspended particles onto a surface of the ground electrode,

wherein the counter electrode comprises a conductor formed of a conductive material, and a resistor covering at least one surface of the conductor, the resistor configured to suppress a discharge current between the first high voltage electrode and the counter electrode.

2. The electrostatic precipitator of claim 1 , wherein having a volume resistivity of 10 14 Ω·cm or more and 10 18 Ω·cm or less.

3. The electrostatic precipitator of claim 1 , wherein the first high voltage electrode has a wire shape or a brush shape.

4. The electrostatic precipitator of claim 1 , wherein the first high voltage electrode is provided with a tooth shaped portion having a pointed leading end or a needle shaped portion having a pointed leading end.

5. The electrostatic precipitator of claim 4 , wherein a plurality of tooth shaped portions or a plurality of needle shaped portions are arranged in a plurality of rows across the air flow direction wherein in each of the plurality of rows a leading end of each of the plurality of tooth shaped portions are parallel to each other or a leading end of each of the plurality of needle shaped portions are parallel to each other.

6. The electrostatic precipitator of claim 1 , wherein the first high voltage electrode comprises a master high voltage electrode and a slave high voltage electrode.

7. The electrostatic precipitator of claim 6 , wherein the master high voltage electrode is provided with a tooth shaped portion or a needle shaped portion and the slave high voltage electrode is provided as a wire shape.

8. The electrostatic precipitator of claim 2 , wherein the conductor of the counter electrode comprises a plurality of flat plates disposed at an interval to guide the air flow direction, and one of a mesh having an opening, a punching metal having an opening, or an expanded metal having an opening.

9. The electrostatic precipitator of claim 1 , wherein the counter electrode is disposed in an upstream side of the air flow direction with respect to the first high voltage electrode.

10. The electrostatic precipitator of claim 1 , further comprising:

a case formed of resin and configured to accommodate the charger, wherein the case accommodating the charger is in electric contact with the conductor of the counter electrode.

11. The electrostatic precipitator of claim 1 , wherein the counter electrode further comprises:

a conductor formed of a conductive material,

a first member covering a portion of the conductor on a side of the first high voltage electrode, and

a second member covering a portion of the first member on the side of the first high voltage electrode, wherein the counter electrode has a connection area in which the second member is electrically connected to the conductor.

12. The electrostatic precipitator of claim 1 , wherein the counter electrode comprises a substrate, a first member formed in a surface of the substrate directed toward the first high voltage electrode and a second member having conductivity formed in the substrate.

13. The electrostatic precipitator of claim 1 , wherein the counter electrode further comprises a substrate, a first member formed in a first surface of the substrate directed toward the first high voltage electrode and a second member having conductivity formed in a second surface of the substrate directed toward the dust collector.

14. The electrostatic precipitator of claim 1 , wherein the first high voltage electrode comprises a plurality of tooth shaped portions or a plurality of needle shaped portions that are arranged perpendicular to the air flow direction, and

the counter electrode further comprises a sub counter electrode formed of a conductive material that is plate shaped and is arranged perpendicular to the air flow direction,

and the plurality of tooth shaped portions or the plurality of needle shaped portions are arranged in parallel with a surface of the sub counter electrode.

15. The electrostatic precipitator of claim 14 , wherein a leading end of the plurality of tooth shaped portions of the high voltage electrode or a leading end of the plurality of needle shaped portions of the first high voltage electrode is directed to a upstream side of the air flow direction.

16. The electrostatic precipitator of claim 14 , wherein the sub counter electrode is disposed in the downstream side of the air flow direction from a leading end of the plurality of tooth shaped portions of the high voltage electrode or a leading end of the plurality of needle shaped portions of the high voltage electrode, and the sub counter electrode is disposed along at least a length of the tooth shaped portion or the needle shaped portion.

17. The electrostatic precipitator of claim 1 , wherein the counter electrode further comprises an insulator disposed between the conductor and the resistor.

18. An electrostatic precipitator comprising:

a charger including a high voltage electrode configured to receive a high voltage from a high voltage generator circuit and a counter electrode and configured to receive a reference voltage from the high voltage generator circuit, wherein the charger is configured to charge suspended particles by generating a discharge between the high voltage electrode and the counter electrode; and

a dust collector disposed in a downstream side of an air flow direction of the charger and configured to collect the suspended particles charged by the charger,

wherein the counter electrode includes a conductor formed of a conductive material, and a resistor covering at least one surface of the conductor, the resistor configured to suppress a discharge current between the first high voltage electrode and the counter electrode and having a volume resistivity of 10 14 Ω·cm or more and 10 18 Ω·cm or less.

19. An electrostatic precipitator comprising:

a charger including a high voltage electrode configured to receive a high voltage from a high voltage generator and a counter electrode configured to receive a reference voltage from the high voltage generator, configured to charge suspended particles by generating a discharge between the high voltage electrode and the counter electrode; and

a dust collector disposed in a downstream side of an air flow direction of the charger and configured to collect the suspended particles charged by the charger,

wherein the high voltage electrode comprises a master high voltage electrode and a slave high voltage electrode.