20140345463 | ELECTROSTATIC PRECIPITATION APPARATUS FOR ROOM VENTILATION AND VENTILATION SYSTEM INCORPORATING SAME - The exemplary system/apparatus can include an electrostatic precipitation apparatus for room ventilation, which can have a two-stage charging type electrostatic precipitator including an ionization section, a particle collection section and a power supply. The exemplary apparatus can include a constant-current control unit/arrangement interposed between the power supply and the ionization section. A sensing unit/arrangement can be interposed between the power supply and the particle collection section. A voltage step control unit/arrangement can receive the applied voltage value and current value from the sensing unit/arrangement for issuing a command to increase or decrease the predetermined voltage to prevent the particle collection section from anomalously discharging in response to an anomalous discharge. A voltage changing unit/arrangement can change the predetermined voltage in response to a command from the voltage step control unit to control a current and a voltage provided from the power supply to the particle collection section. | 11-27-2014 |