Photocatalytic load reduction to extend reactive media filtration life in an air purification system

Patent metadata

Field	Value
Publication number	US-11524090-B1
Application number	US-202117338773-A
Country	US
Kind code	B1
Filing date	Jun 4, 2021
Priority date	Sep 18, 2020
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A process for using photocatalytic load reduction to extend reactive media filtration life is disclosed for an air purification system. The system consists of three methods of cleaning the air including a UV light, a photocatalyst, and an air purifier. Air first passes through a portion with the UV light and photocatalyst, and then through the purifier. Passing the air first through the UV light and photo catalyst before the purifier reduces the load on the purifier and thus allowing the purifier to operate and clean the air for an extended period of time as compared to the purifier alone.

First claim

What is claimed is:

1. A single unit in-duct air purification device for insertion into ductwork or duct board proximate an air handler of a residential HVAC system for reducing and removing air contaminants, comprising:
an open hexahedron chamber having two open surfaces opposite one another, a first side surface securing a purifier, a second side surface securing two ultra-violet C (UV-C) lamps and an electrical ballast, a third side surface opposite the first side surface and is a baffled surface covered with a TiO 2 coating, and fourth side surface opposite the second side surface that secures the first side surface and third side surface together;
wherein the first side surface is formed as a pair of rails and the purifier is an activated carbon potassium permanganate (AC/PP) purifier and the purifier is mounted in the pair of rails;
wherein the UV-C lamps are positioned between the first side and the third side, and further wherein the UV-C lamps are closer to the third side in order for ultraviolet light emitted from the UV-C lamps to irradiate the TiO 2 coating and causes the TiO 2 coating to react with moisture in the air to make hydroxyl (OH) radicals which will then react and oxidize contaminants into products of carbon dioxide and water;
wherein the electrical ballast is connected to the two UV-C lamps and attached to the second side that is a flange to support the device when mounted in the ductwork proximate the air handler in the residential HVAC system, and wherein the second side contains an access plate that is removable so that the purifier can be removed and replaced without having to remove the device from the ductwork;
and
wherein the rails of the first side are fastened to the fourth side and the third side is fastened to the fourth side.

Assignees

• Mainstream Eng Corporation

Inventors

• Wagner Andrew L
• Cox Philip

Classifications

• A61L9/205 Primary

  using a photocatalyst or photosensitiser · CPC title

• A61L9/014

  containing sorbent material, e.g. activated carbon · CPC title

• A61L2209/12

  Lighting means · CPC title

• A61L2209/16

  Connections to a HVAC unit · CPC title

• A61L2209/22

  Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning · CPC title