Ionic wind delivery device

An ionic wind delivery device comprising:

• a first discharge electrode;
• a reference electrode that is arranged separate from the first discharge electrode;
• a first power supply circuit that is configured to output a voltage to induce a corona discharge between the first discharge electrode and the reference electrode;
• a first control electrode that is arranged on a delivery path of an ionic wind of ions that are generated by the corona discharge induced between the first discharge electrode and the reference electrode;
• a second discharge electrode that is arranged between the reference electrode and the first control electrode;
• a second power supply circuit that is configured to output a voltage that accelerates the ions generated by the corona discharge induced between the first discharge electrode and the reference electrode and induces a corona discharge between the second discharge electrode and the first control electrode;
• a second control electrode that is arranged on a delivery path of an ionic wind of ions generated by the corona discharge induced between the second discharge electrode and the first control electrode;
• a third discharge electrode that is arranged between the first control electrode and the second control electrode;
• a third power supply circuit that is configured to output a voltage to accelerate ions generated by a corona discharge induced between the third discharge electrode and the second control electrode and to induce the corona discharge between the third discharge electrode and the second control electrode;
• a case that accommodates at least the second control electrode, and has a jet opening to emit an ionic wind of the ions generated by the corona discharge induced between the first discharge electrode and the reference electrode, the corona discharge induced between the second discharge electrode and the first control electrode, and the corona discharge induced between the third discharge electrode and the second control electrode;
• and
• a control unit that is configured to switch an output voltage of the second power supply circuit between a voltage that prohibits the corona discharge between the second discharge electrode and the first control electrode and a voltage that induces the corona discharge between the second discharge electrode and the first control electrode, and to switch an output voltage of the third power supply circuit between a voltage that prohibits the corona discharge between the third discharge electrode and the second control electrode and a voltage that induces the corona discharge between the third discharge electrode and the second control electrode, wherein
• the control unit controls the output voltage of the third power supply circuit to the voltage that prohibits the corona discharge between the third discharge electrode and the second control electrode at least in a part of a period of time in which the output voltage of the second power supply circuit is controlled to the voltage that prohibits the corona discharge between the second discharge electrode and the first control electrode,
• the control unit controls the output voltage of the third power supply circuit to the voltage that induces the corona discharge between the third discharge electrode and the second control electrode at least in a part of a period of time in which the output voltage of the second power supply circuit is controlled to the voltage that induces the corona discharge between the second discharge electrode and the first control electrode,
• the control unit switches an output voltage of the first power supply circuit to a voltage that induces the corona discharge between the first discharge electrode and the reference electrode, switches the output voltage of the second power supply circuit to the voltage that induces the corona discharge between the second discharge electrode and the first control electrode, and switches the output voltage of the third power supply circuit to the voltage that induces the corona discharge between the third discharge electrode and the second control electrode, so that an ionic wind of the ions generated by the corona discharges induced between the first discharge electrode and the reference electrode, between the second discharge electrode and the first control electrode, and between the third discharge electrode and the second control electrode is emitted out from the jet opening as a jet stream, and
• after the ionic wind is emitted out from the jet opening, and before the control unit again controls the output voltage of the third power supply circuit to the voltage that induces the corona discharge between the third discharge electrode and the second control electrode, the control unit controls the third power supply circuit to output a voltage so as to move ions present between the first control electrode and the second control electrode toward the first control electrode, and the second power supply circuit to output a voltage so as to move ions present between the reference electrode and the first control electrode toward the reference electrode.