Portable decontamination unit

• US 9,072,805 B1
• Filed: 12/17/2014
• Issued: 07/07/2015
• Est. Priority Date: 12/30/2013
• Status: Active Grant

• Current Assignee: American Sterilizer Company (Steris Corporation)
• Original Assignee: American Sterilizer Company (Steris Corporation)
• Inventors: Zelina, Francis J., Leight, Steven D., Pedersen, Cameron J.
• Primary Examiner(s): CONLEY, SEAN EVERETT
• Application Number:
  US14/572,985
• Publication Number:
  US 20150182650A1
• Time in Patent Office: 202 Days
• Field of Search: 422/292
• US Class Current: 1/1
• CPC Class Codes: A61L 2/208 Hydrogen peroxide
• CPC Class Codes: A61L 2/24 Apparatus using programmed or automatic operation
• CPC Class Codes: A61L 2202/11 Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
• CPC Class Codes: A61L 2202/13 Biocide decomposition means, e.g. catalysts, sorbents
• CPC Class Codes: A61L 2202/16 Mobile applications, e.g. portable devices, trailers, devices mounted on vehicles

Abstract

An apparatus for decontaminating a region within an enclosure. The apparatus comprises a conduit having a passageway therethrough that defines a path for a carrier gas. A plurality of tube sections, each of the tube sections having an opening extending therethrough, is selectively movable into and out of a gap in the conduit. A heating element is disposed in one of the tube sections and is operable to heat the carrier gas flowing therethrough. A destroyer is disposed in another of the tube sections and is operable to destroy sterilant in the carrier gas. A controller controls movement of the tube sections into and out of the gap.

Claims

1. An apparatus for decontaminating a region within an enclosure, said apparatus comprising:

a conduit having a passageway therethrough, said passageway defining a path for a carrier gas, said conduit having a first end and a second end, each of said ends being connectable to an enclosure to define a closed-loop path that includes a region of said enclosure;

a blower attached to said conduit for re-circulating a carrier gas into, through and out of said region of said enclosure;

a nozzle for injecting a sterilant into said conduit;

a space or gap defined in said conduit;

a plurality of tubular chambers, each of said chamber having an opening therethrough and each of said chamber being selectively movable into and out of said gap, an opening in a chamber being aligned with said passageway in said conduit when said chamber is disposed in said gap, wherein said opening in said chamber is aligned with said passageway in said conduit;

a heating element disposed in one of said tubular chambers operable to heat said carrier gas flowing therethrough;

a destroyer disposed in another of said tubular chambers operable to destroy sterilant in said carrier gas; and

a controller for controlling movement of said tubular chambers into and out of said gap and the operating of said heating element and said nozzle.

2. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said tubular chambers are disposed about a central axis.

3. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said tubular chambers are disposed side-by-side and rotatable about a central axis.

4. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said apparatus includes three, like tubular chambers disposed side-by-side about a central axis,

a first of said tubular chambers including a heating element,

a second of said tubular chambers including a destroying element, and

a third of said tubular chambers including a desiccant.

5. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein a sealed enclosure surrounds said gap in said conduit.

6. An apparatus for decontaminating a region within an enclosure as defined in claim 5, wherein said tubular chambers are contained within said sealed enclosure and are movable therein.

7. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said controller is programmed to perform a decontamination operation for decontaminating said region within said enclosure, said decontamination operation including:

a heating phase,

a drying phase,

a sterilant vaporization phase, and

a sterilant breakdown phase.

8. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said controller causes a tubular chamber having a heating element to align with said conduit during a carrier gas heating phase.

9. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said controller causes a tubular chamber having a heating element to align with said conduit during a sterilant vaporization phase.

10. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said controller causes a tubular chamber having a desiccant therein to align with said conduit during a drying phase.

11. An apparatus for decontaminating a region within an enclosure as defined in claim 1, wherein said controller causes a tubular chamber having a destroyer therein to align with said conduit during a sterilant breakdown phase.

12. A closed loop, flow through vapor phase decontamination system, comprising:

a conduit having a passageway therethrough, said passageway defining a path for a carrier gas, said conduit having a first end and a second end, each of said ends being connectable to an enclosure to define a closed-loop path that includes a region of said enclosure;

a blower connected to said conduit system for re-circulating a carrier gas flow into, through and out of the chamber;

a nozzle for injecting a sterilant into said closed loop conduit system;

a destroyer for converting the vaporized hydrogen peroxide in water and oxygen; and

a heating element operable to heat said carrier gas flowing through said closed loop conduit system,

wherein said destroyer and said heating element are selectively movable into and out of alignment with said passageway in said conduit, said heating element operable to heat said carrier gas and vaporize said sterilant when said heating element is aligned with said passageway and said destroyer operable to break down said sterilant when said destroyer is aligned with said passageway.

13. A decontamination system as defined in claim 12, wherein said heating element is mounted adjacent to said destroyer, and each is movable along a path into and out of alignment with said passageway through said conduit.

14. A decontamination system as defined in claim 13, wherein said heating element and said destroyer are movable along a circular path.

15. A decontamination system as defined in claim 14, wherein said heating element and said destroyer are each disposed in a tubular chamber and said chambers are rotatable about a central axis.

16. A decontamination system as defined in claim 12, further comprising a desiccant which is selectively movable into and out of alignment with said passageway.

17. A decontamination system as defined in claim 16, wherein said desiccant is mounted adjacent to said heating element and said destroyer and is movable along a path into and out of alignment with said passageway.

18. A decontamination system as defined in claim 17, wherein said heating element, said destroyer, and said desiccant are movable along a circular path.

19. A decontamination system as defined in claim 18, wherein said desiccant is disposed in a tubular chamber that is rotatable about a central axis.

20. A decontamination system as defined in claim 19, wherein said heating element, said destroyer, and said desiccant are movable along a circular path within a sealed enclosure.