System and method for removing dust from air

A method for increasing oxygen for the air including the following steps:

• enabling the air to pass through a flow channel;
• producing an electric field in the flow channel, wherein the electric field is not perpendicular to the flow channel, and the electric field includes an entrance and an exit,
• wherein the electric field includes a first anode and a first cathode, the first anode and the first cathode form the flow channel, and the flow channel connects the entrance and the exit, and the first anode and the first cathode ionize oxygen in the air,
• the electric field includes a second electrode, and the second electrode is provided at or close to the entrance, and second electrode is a cathode, wherein the second electrode is an extension of the first cathode, and/or the electric field includes a third electrode, and the third electrode is provided at or close to the exit, and third electrode is an anode, wherein the third electrode is an extension of the first anode.