Enhanced photo-catalytic cells
A photo-catalytic cell may produce bactericidal molecules in air by passing air across catalyst coated targets. Ultraviolet (UV) energy may be emitted from a source. A first portion of the UV energy from the source may be applied directly onto the targets. A second portion of the UV energy from the source may be reflected onto the targets.
1. An apparatus for ionizing air, the apparatus comprising:
a chamber including:
a top portion,
a bottom portion,
a first side including a first target comprising:
a plurality of passages between an interior area of the chamber and an exterior area of the chamber, and
a photo-catalytic coating on the plurality of passages;
a second side opposite the first side and including a second target comprising:
a plurality of passages between the interior area of the chamber and the exterior area of the chamber, and
the photo-catalytic coating on the plurality of passages;
a first reflector arranged on the top portion of the chamber and configured to:
reflect UV energy emitted along a dimension towards the first target from a UV emitter located within the chamber directly to the photo-catalytic coating of the first target, wherein the first reflector is a specular UV reflector, and
reflect UV energy emitted along a dimension towards the second target from the UV emitter directly to the photo-catalytic coating of the second target;
a second reflector arranged on the bottom portion of the chamber and configured to:
reflect UV energy emitted along a dimension towards the first target from the UV emitter located within the chamber directly to the photo-catalytic coating of the first target, wherein the second reflector is a specular UV reflector, and
reflect UV energy emitted along a dimension towards the second target from the UV emitter directly to the photo-catalytic coating of the second target; and
wherein the photo-catalytic coating is arranged to:
receive UV energy directly from the UV emitter,
receive UV energy reflected from the first reflector, and
receive UV energy reflected from the second reflector.
2. The apparatus of claim 1 , further comprising at least one corner reflector arranged in an interior corner of the chamber, wherein the at least one corner reflector is a specular UV reflector.
3. The apparatus of claim 1 , further comprising:
a third reflector located at a corner between the first target and the first reflector;
a fourth reflector located at a corner between the second target and the first reflector;
a fifth reflector located at a corner between the first target and the second reflector; and
a sixth reflector located at a corner between the first target and the second reflector.
4. The apparatus of claim 1 , further comprising an additional reflector on the first target and facing the interior area of the chamber,
wherein the additional reflector configured to reflect UV energy that is emitted from the UV emitter in a direction that is almost orthogonal to the first target, and
wherein the additional reflector is a specular UV reflector.
5. The apparatus of claim 1 , wherein a reflecting surface of the first reflector is electrically conductive.
6. The apparatus of claim 1 , wherein the first target comprises a honeycomb matrix.
7. The apparatus of claim 1 , wherein the first reflector comprises a material having a UV reflectivity of about 90% or greater at UV wavelengths of 185 nm and 254 nm.