Electrostatic precipitator

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 generates the ions having the same polarity as an applied predetermined voltage by applying the voltage to an electrode needle to cause corona discharge,
• 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 or a ground voltage having polarity opposite to polarity of the voltage applied to the high-voltage electrode to electrically adsorb the dust to which the ions are attached,
• wherein the 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, and
• 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 covered with an insulator,
• wherein the dust collection board of the dust collection unit is formed by a base material such as a semi-conductor or an insulator and a carbon material covering the base material, and
• wherein an ionizer having an electrode needle of the same polarity as the electrode needle of the ionization unit is additionally provided above and outside the dust collection unit.