Electric dust-collecting filter

An electric dust filter, comprising:

• a dust collection part configured to collect foreign substances charged with a specific charge among negative and positive charges, the dust collection part including first and second electrode plates installed in one or more pairs on an air flow path leading to a vehicle interior so as to form an air flow path therebetween, the first and second electrode plates configured to generate an electric field in a specific direction therebetween using voltages with different magnitudes and collect foreign substances having a specific charge by an attractive force;
• and
• a control part configured to variably control the magnitudes of voltages applied to the first and second electrode plates according to a preset logic so that the attractive forces of the first and second electrode plates for the foreign substances having a specific charge can be alternately changed while reversing the direction of the electric field formed between the first and second electrode plates.