Patent ID: 7641718

Claim:
An electrostatic precipitator comprising a housing having an air duct that is formed inside for communication between an inlet for sucking contaminated air containing fine particles and an outlet for discharging resulted cleaned air after removing said fine particles, a air flow generating means for generating an air flow in the air duct for said sucking contaminated air and discharging clean air, a discharge means that is formed in the aforementioned air duct and charges by corona discharge (CD) said fine particles that are contained in said contaminated air, a collecting means that is formed in said air duct and collects using the Coulomb force said fine particles that had been charged by said discharge means, and a discharge voltage supplying means that is electrically connected to said discharge means and supplies the discharge voltage that enables said CD, wherein said collecting means comprises: an adsorption shaft that bridges said air duct perpendicular to a direction of said air flow, a plurality of adsorption plates that are generally discoid, installed on said adsorption shaft while the adsorption surfaces oppose each other, adsorb and collect said fine particles on said adsorption surface by using the Coulomb force, and an adsorption plate rotating means that is connected to one end of said adsorption shaft and rotates said adsorption plates along said adsorption shaft; and said discharge means comprises: a discharge axis that is electrically connected to said discharge voltage supplying means, a plurality of charging plates that are supported by said discharge axis, inserted between a pair of said adsorption plates that oppose each other, has discharge surfaces approaching the adsorption surfaces of the adsorption plates, and arranged while being electrically insulated from the adsorption plates; and a plurality of discharging electrodes that are fixed and project from the opposing edge of said inlet of the charging plate to said inlet and have pointed ends that are formed at the ends.