CPC F24F 8/167 (2021.01) [A61L 9/205 (2013.01); F24F 8/10 (2021.01); F24F 8/24 (2021.01); A61L 2209/12 (2013.01); A61L 2209/14 (2013.01); A61L 2209/15 (2013.01); A61L 2209/16 (2013.01)] | 20 Claims |
1. A fluid treatment device, comprising:
at least one photocatalytic filter including a surface coated with a photocatalyst and activated by illumination of light and for deodorizing and sterilizing a fluid;
a frame holding the at least one photocatalytic filter; and
a light source unit coupled to the frame, the light source unit comprising:
at least one light emitting diode to emit light toward the at least one photocatalytic filter; and
at least one light source support member comprising an upper surface on which the at least one light emitting diode is disposed and a lower surface opposite to the upper surface and having a reflective portion on the upper surface to reflect the light from the at least one light emitting diode toward the at least one photocatalytic filter;
wherein the at least one light source support member and the at least one photocatalytic filter are coupled to the frame such that the at least one photocatalytic filter is spaced apart from the at least one light emitting diode by a predetermined distance and maintains the predetermined distance;
wherein a ratio D/L of a diameter D of an illumination region over the at least one photocatalytic filter by the at least one light emitting diode to a first distance L between the at least one photocatalytic filter and the at least one light emitting diode is within a preset range;
wherein:
the first distance L and a position of the at least one light emitting diode on the upper surface are adjustable to irradiate the light from the at least one light emitting diode such that the diameter D of the illumination region is maximized and light from one light emitting diode, or light from two or more light emitting diodes, taken together, reaches a substantially entire area of the at least one photocatalytic filter; and
irradiance of the light over the illumination region does not exceed 21.72 mW/cm2, regardless of different values of the first distance.
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