Apparatus and method for controlling humidity

1. A humidity control apparatus comprising:

a water holding tank holding water therein;

a first electrode disposed on a surface of the water holding tank and having a hole;

a second electrode positioned opposite to the first electrode;

a first electrical power control unit applying a voltage to the first electrode and the second electrode;

a nozzle coupled to the hole of the first electrode and emitting water droplets to the second electrode in response to the applied voltage; and

a first insulator disposed on the second electrode and electrically insulating the second electrode.

2. The humidity control apparatus of claim 1 , wherein the first insulator has a superhydrophobic property.

3. The humidity control apparatus of claim 2 , wherein the first insulator has a composite structure of a micron structure and a nano structure.

4. The humidity control apparatus of claim 2 , wherein the first insulator has a surface treated with a substance including a fluorine group.

5. The humidity control apparatus of claim 2 , wherein, when the voltage is applied to the first electrode and the second electrode, the water droplets are emitted from the nozzle, and the water droplets are repelled at the first insulator into air.

6. The humidity control apparatus of claim 1 , wherein the nozzle has a fine-sized hole formed therein.

7. The humidity control apparatus of claim 1 , wherein the water holding tank has a hole formed therein, the hole of the water holding tank corresponding to the hole of the first electrode.

8. The humidity control apparatus of claim 1 , wherein the voltage has a DC or AC mode, and a flow rate of the water droplets discharged from the nozzle is fixed by physical characteristics of the voltage.

9. The humidity control apparatus of claim 1 , further comprising a housing which encloses the water holding tank, and wherein the second electrode is positioned adjacent to the housing.

10. The humidity control apparatus of claim 9 , further comprising a fan positioned at the housing discharging the water droplets to outside of the housing.

11. The humidity control apparatus of claim 1 , further comprising a pressurizing unit applying a pressure to the water holding tank.

12. The humidity control apparatus of claim 1 , further comprising:

a third electrode positioned opposite to the second electrode; and

a second electrical power control unit applying a voltage to the second electrode and the third electrode.

13. The humidity control apparatus of claim 12 , further comprising a second insulator disposed on the third electrode to have a superhydrophobic property.

14. The humidity control apparatus of claim 13 , wherein each of the second electrode and the first insulator has a hole formed therein causing the water droplets emitted from the nozzle to pass therethrough.

15. A method for controlling humidity with a humidity control apparatus including a water holding tank for holding water therein, the method comprising:

applying a first voltage to a first electrode and a second electrode, the second electrode having a first insulator disposed thereon, the first insulator electrically insulating the second electrode;

mitting water droplets from the nozzle to the second electrode by the application of the first voltage;

repelling the emitted water droplets into air by the first insulator; and

applying a second voltage to the second electrode and a third electrode, the third electrode being disposed opposite to the second electrode and having a second insulator disposed thereon, the second insulator electrically insulating the third electrode.

16. The method of claim 15 , wherein the first insulator has a superhydrophobic property.

17. The method of claim 15 , wherein the voltage has an AC or DC mode, and a size or a flow rate of the water droplets is fixed by physical characteristics of the voltage.

18. The method of claim 15 , further comprising applying pressure to the water holding tank.

19. The method of claim 15 , wherein the second insulator has a superhydrophobic property.

20. The humidity control apparatus of claim 1 , wherein the nozzle includes a portion protruding from an outer surface of the first electrode.