Photocatalytic filter and air conditioning device comprising photocatalytic filter

1. An air conditioning device comprising:

a photocatalytic filter including a plurality of transition metal plates having a surface on which a transition metal oxide is formed as a plurality of nanotubes thereon, wherein the plurality of transition metal plates are spaced apart from each other to allow air to pass between the plurality of transition metal plates, and wherein the transition metal oxide removes gas included in the air and includes at least one of TiO 2 , ZnO, NiO, or WO 3 ; and

a light source configured to irradiate the photocatalytic filter with light, the light source including a plurality of light emitting diodes (LEDs) corresponding to the plurality of transition metal plates, respectively, wherein the plurality of LEDs is disposed on a transition metal plate that is adjacent to a target transition metal plate to be irradiated with light by each of the plurality of LEDs,

wherein a width of a first transition metal plate among the plurality of transition metal plates is determined based on a light emission angle of a first LED corresponding to the first transition metal plate and a distance between the first transition metal plate and the first LED.

2. The air conditioning device as claimed in claim 1 , further comprising:

a suction port configured to suck air from outside; and

a discharging port configured to discharge air filtered by the photocatalytic filter to the outside,

wherein the air sucked by the suction port moves toward the discharging port, and

the plurality of transition metal plates are arranged in line at a predetermined angle with respect to a direction in which the air sucked by the suction port moves toward the discharging port.

3. The air conditioning device as claimed in claim 2 , wherein the predetermined angle and an interval at which the plurality of transition metal plates are arranged are determined based on at least one of a flow rate of the air, a flow velocity of the air, a contact area with the plurality of transition metal plates per unit volume of the air, a structure of the air conditioning device, or a layout of the plurality of transition metal plates.

4. The air conditioning device as claimed in claim 2 , wherein the light source includes an LED layer in which a plurality of LEDs that irradiate the plurality of transition metal plates with light, respectively, are arranged in line.

5. The air conditioning device as claimed in claim 1 , wherein a width of each of the plurality of transition metal plates is determined based on a light emission angle of the plurality of LEDs.

6. The air conditioning device as claimed in claim 1 , wherein the photocatalytic filter includes:

a first layer in which a plurality of transition metal plates are arranged in line at a predetermined interval; and

a second layer which is spaced apart from the first layer and in which a plurality of transition metal plates are arranged in line at a predetermined interval, and

the plurality of transition metal plates included in the first layer and the plurality of transition metal plates included in the second layer are arranged to be misaligned with each other.

7. The air conditioning device as claimed in claim 6 , wherein a plurality of LEDs corresponding to the plurality of transition metal plates included in the first layer, respectively, are each disposed in a space of the second layer corresponding to each of the plurality of transition metal plates included in the first layer, and

a plurality of LEDs corresponding to the plurality of transition metal plates included in the second layer, respectively, are each disposed in a space of the first layer corresponding to each of the plurality of transition metal plates included in the second layer.

8. The air conditioning device as claimed in claim 6 , wherein the light source includes a third layer including a plurality of LEDs that irradiate the plurality of transition metal plates included in the first layer and the plurality of transition metal plates included in the second layer with light, respectively.

9. The air conditioning device as claimed in claim 1 , wherein at least one transition metal plate of the plurality of transition metal plates has a plurality of holes through which air passes.

10. The air conditioning device as claimed in claim 9 , wherein the light source includes a plurality of LEDs arranged at a predetermined interval based on a light emission angle.

11. The air conditioning device as claimed in claim 10 , wherein the plurality of holes are each formed in a region where an intensity of light irradiated on at least one transition metal plate of the plurality of transition metal plates by each of the plurality of LEDs is less than a predetermined value.