AIR HANDLER AND PURIFIER

• US 20090123343A1
• Filed: 09/15/2008
• Published: 05/14/2009
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: Applied Nanotech Holdings Incorporated (Nano Magic, Inc.)
• Original Assignee: Applied Nanotech Holdings Incorporated (Nano Magic, Inc.)
• Inventors: Kwiatkowski, Krzysztof C.
• Granted Patent: US 7,824,626 B2
• Time in Patent Office: Days
• US Class Current: 422/121
• CPC Class Codes: A61L 9/205 using a photocatalyst or photosensitiser
• CPC Class Codes: B01D 2255/104 Silver
• CPC Class Codes: B01D 2255/20707 Titanium
• CPC Class Codes: B01D 2255/802 Photocatalytic
• CPC Class Codes: B01D 2255/9022 Two layers
• CPC Class Codes: B01D 2257/70 Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
• CPC Class Codes: B01D 2257/91 Bacteria; Microorganisms
• CPC Class Codes: B01D 2259/804 UV light
• CPC Class Codes: B01D 53/8668 Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
• CPC Class Codes: B01D 53/8671 Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
• CPC Class Codes: B01J 21/04 Alumina
• CPC Class Codes: B01J 23/50 Silver
• CPC Class Codes: B01J 35/004 Photocatalysts
• CPC Class Codes: B01J 35/06 Fabrics or filaments
• CPC Class Codes: B01J 35/39 Photocatalytic properties
• CPC Class Codes: B01J 35/58 Fabrics or filaments
• CPC Class Codes: B01J 37/0215 Coating
• CPC Class Codes: B01J 37/0244 Coatings comprising several layers
• CPC Class Codes: F24F 3/16 by purification, e.g. by filtering; by sterilisation; by ozonisation
• CPC Class Codes: F24F 8/167 using catalytic reactions
• CPC Class Codes: F24F 8/22 : using UV light

Abstract

A system that captures and eliminates indoor pollutants and chemical and biological agents within a HVAC system by breaking down the pollutants and chemical and biological threats into non-hazardous molecules. The surface area created by crystalline titanium dioxide nano-structures results in highly effective elimination rates when catalytic ionization by UV exposure occurs. The catalyst is activated with UVA light.

Claims

1. A filter material for gas and liquid comprising:

a support layer;

a layer of binder on the support layer in which ionic silver and/or metallic silver particles are incorporated; and

a layer comprising particles of photocatalyst deposited on the layer of binder,

wherein loading of ionic silver varies from 0.1 to 10 grams per square meter of the filter material, and loading of photocatalyst particles varies from 1 to 100 grams per square meter of the filter material, and wherein the layer comprising particles of photocatalyst is a topmost layer adjacent to an ongoing flow of the gas or the liquid.

2. The filter material as in claim 1, wherein the support layer comprises glass fibers.

3. The filter material as in claim 1, wherein the support layer comprises semi-HEPA.

4. The filter material as in claim 1, wherein the support layer comprises HEPA.

5. The filter material as in claim 1, wherein the ionic silver is in a form of silver salts.

6. The filter material as in claim 1, wherein the binder comprises silica sol.

7. The filter material as in claim 1, wherein the photocatalyst comprises titanium dioxide.

8. An apparatus of air treatment comprising:

a chamber with an inlet and an outlet for air flow;

an air filter positioned so that air is forced to flow through the filter; and

a source of UV radiation that irradiates a topmost layer of the air filter, wherein the topmost layer comprises a photocatalyst.