Air sterilization and disinfection method

• US 9,480,768 B2
• Filed: 10/29/2014
• Issued: 11/01/2016
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: Molekule Group, Inc.
• Original Assignee: Cleanco Bioscience Group LLC
• Inventors: Reisenauer, William E., Krosney, Mark D.
• Primary Examiner(s): Joyner, Kevin
• Application Number:
  US14/527,449
• Publication Number:
  US 20150078960A1
• Time in Patent Office: 734 Days
• Field of Search: 422/120, 422/121
• US Class Current: 1/1
• CPC Class Codes: A61L 2202/11 Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
• CPC Class Codes: A61L 2209/14 Filtering means
• CPC Class Codes: A61L 2209/16 Connections to a HVAC unit
• CPC Class Codes: A61L 9/20 Ultraviolet radiation
• CPC Class Codes: B01D 2257/91 Bacteria; Microorganisms
• CPC Class Codes: B01D 2259/804 UV light
• CPC Class Codes: B01D 53/007 by irradiation

Abstract

An apparatus (100 and/or 200) and corresponding method (500) for air sterilization and disinfection can include an electronics and control module (110 and/or 210), a means for drawing air from the surrounding environment into the apparatus (120 and/or 220), an air management chamber (130 and/or 230), and a housing (170 and/or 270). The means for drawing air from the surrounding environment into the apparatus (120 and/or 220) mobilizes latent pathogens in the environment and draws them into the apparatus (100 and/or 200) for sterilization and disinfection. The air management chamber (130 and/or 230) provides for exposure of the airborne pathogens to UV radiation, via UV LEDs (150 and/or 250), with a dosage sufficient to penetrate the cell walls and destroy the pathogens. The electronics and control module (110 and/or 210) powers the apparatus (100 and/or 200) and interfaces with the electronic components. The housing (170) forms the outer shell of the apparatus (100).

Claims

1. A method of sterilizing and disinfecting air, the method comprising:

creating a convective air exchange to mobilize pathogens in a room;

forcing room air with the pathogens into an airflow management chamber, wherein the airflow management chamber comprises one or more reaction tubes;

exposing the air with the pathogens in the air management chamber to ultraviolet (UV) radiation at a wavelength known to traverse the cellular walls;

creating a turbulent flow within the air management chamber such that airborne pathogens are exposed to the UV radiation for a specified amount of time;

directing the air through a HEPA filter;

directing the air through a silver ion plus citric acid infused material; and

expelling the sanitized and disinfected air back into the surrounding environment.

2. The method of claim 1, wherein the convective air exchange is characterized as an air flow rate of between 180 to 300 cu. Ft./min.

3. The method of claim 1, wherein the airborne pathogens are exposed to the UV radiation for greater than one second.

4. The method of claim 1, wherein the UV radiation wavelength is less than 320 nm.

5. The method of claim 1, wherein the airflow management chamber if formed from aluminum.

6. The method of claim 1, wherein the airflow management chamber is configured to prevent escape of UV radiation.

7. The method of claim 1, wherein the UV radiation is generated by at least one light emitting diode (LED).

8. A method of sterilizing and disinfecting air, the method comprising:

drawing air through a filter into a one or more reaction tubes with a convective air exchange sufficient to mobilize latent pathogens;

exposing the air to ultraviolet (UV) radiation within the one or more reaction tubes;

reflecting the UV radiation within the one or more reaction tubes;

creating a turbulent flow within the one or more reaction tubes to increase exposure time of the air to the UV radiation, wherein the air flow is exposed to UV radiation for greater than one second within the one or more reaction tubes;

directing the air through a HEPA filter;

directing the air through a silver ion plus citric acid infused material; and

expelling sterilized and disinfected air from the one or more reaction tubes.

9. The method of claim 8, further comprising:

monitoring the UV levels in the one or more reaction tubes;

determining if the irradiance level in the one or more reaction tubes is adequate for the desired pathogen kill rate; and

exposing the air to antimicrobial surfaces.

10. The method of claim 8, wherein the convective air exchange is characterized as an air flow rate of between 180 to 300 cu. Ft./min.

11. The method of claim 8, wherein the UV radiation wavelength is less than 320 nm.

12. The method of claim 9, wherein the antimicrobial surfaces are chosen from the group consisting of aluminum, copper, and copper alloys.