Bulkhead assembly for VHP unit with removable diffuser

Patent metadata

Field	Value
Publication number	US-9211354-B2
Application number	US-201213627122-A
Country	US
Kind code	B2
Filing date	Sep 26, 2012
Priority date	Sep 28, 2011
Publication date	Dec 15, 2015
Grant date	Dec 15, 2015

Abstract

A system for decontaminating an enclosure that defines a region. The system includes a decontamination unit for generating a vaporized sterilant. The decontamination unit includes a housing that defines a chamber therein. An inlet and an outlet of the housing fluidly communicate with the chamber. A bulkhead assembly connects the decontamination unit to the enclosure. The bulkhead assembly includes a barrier assembly for sealing an opening of the enclosure. The membrane traverses the opening of the enclosure. A first port and a second port allow the carrier gas to flow through the membrane. A frame assembly seals the barrier assembly into the opening of the enclosure. An outlet conduit defines a flow path for conveying the carrier gas from the decontamination unit to the region of the enclosure. A return conduit defines a flow path for conveying the carrier gas from the enclosure to the decontamination unit.

First claim

Having described the invention, the following is claimed:

1. A system for decontaminating an enclosure defining a region, said system including:
a decontamination unit for generating a vaporized sterilant, said decontamination unit comprising:
a housing defining a chamber therein, said housing having an inlet and an outlet fluidly communicating with said chamber;
a blower for conveying a carrier gas from said inlet, through said chamber and to said outlet of said housing; and
a generator for introducing a vaporized sterilant into said carrier gas conveyed through said housing; and

a bulkhead assembly for connecting said decontamination unit to said enclosure, said bulkhead assembly comprising:
a barrier assembly for sealing an opening of said enclosure, said barrier assembly including:
a membrane resistant to said vaporized sterilant, said membrane traversing said opening of said enclosure; and
a first port and a second port for allowing said carrier gas to flow through the membrane;

an adjustable frame assembly for positioning said membrane of said barrier assembly in said opening of said enclosure, said adjustable frame assembly comprising:
an adjustable upper assembly for holding said membrane in sealing engagement with a top of said opening of said enclosure, said upper assembly having distal ends;
an adjustable lower assembly for holding said membrane in sealing engagement with a bottom of said opening of said enclosure, said lower assembly having distal ends; and
a pair of adjustable side assemblies for holding said membrane in sealing engagement with opposite sides of said opening of said enclosure, each of said pair of side assemblies having distal ends, a notch formed in at least one of said distal ends of each of said pair of side assemblies, said notches defining a first pair of spaced-apart tabs disposed at one of said top of said opening or said bottom of said opening, said first pair of spaced-apart tabs dimensioned to receive one of said upper assembly or said lower assembly and to secure said upper assembly or said lower assembly in a press-fit fashion between said first pair of spaced-apart tabs,
wherein said upper assembly or said lower assembly is inserted between said first pair of spaced-apart tabs from a front of said adjustable frame assembly, and
wherein lengths of said upper assembly, said lower assembly and said pair of side assemblies are independently adjustable for independently varying a length of each side of said adjustable frame assembly;

an outlet conduit connected at one end to said outlet of said decontamination unit and at another end to said first port of said barrier assembly, said outlet conduit defining a flow path for conveying said carrier gas from said decontamination unit to said region of said enclosure; and
a return conduit connected at one end to said inlet of said decontamination unit and at another end to said second port of said barrier assembly, said return conduit defining a flow path for conveying said carrier gas from said region to said decontamination unit.

2. The system as defined in claim 1 , wherein said generator includes a nozzle for introducing a fine mist of aqueous sterilant into said carrier gas, wherein said aqueous sterilant vaporizes at an ambient air temperature of said region.

3. The system as defined in claim 1 , further comprising a clamp assembly for attaching said outlet conduit to said outlet of said decontamination unit.

4. The system as defined in claim 1 , further comprising a clamp assembly for attaching said return conduit to said inlet of said decontamination unit.

5. The system as defined in claim 1 , wherein said vaporized sterilant is vaporized hydrogen peroxide.

6. The system as defined in claim 1 , wherein said decontamination unit further comprises:
a removable diffuser disposed relative to said outlet of said housing for redirecting said carrier gas exiting said outlet of said chamber into a predetermined direction; and
a clamp assembly for positioning said removable diffuser relative to said outlet of said housing.

7. The system as defined in claim 1 , wherein said decontamination unit further comprises:
a plurality of sensors for providing signals indicative of properties of said carrier gas in said region; and
a controller for controlling the operation of said decontamination unit, said controller connected to said plurality of sensors for determining a maximum rate that said vaporized sterilant may be injected into said carrier gas based on signals received from said plurality of sensors.

8. The system as defined in claim 7 , wherein said plurality of sensors is disposed within said region.

9. The system as defined in claim 7 , wherein said plurality of sensors is disposed within said chamber of said decontamination unit.

10. An apparatus as defined in claim 7 , wherein said plurality of sensors includes at least one of the following: a humidity sensor, a temperature sensor and a vaporized hydrogen peroxide concentration sensor.

11. An apparatus for connecting a decontamination unit to an enclosure, said apparatus including:
an outlet conduit defining a flow path for conveying a carrier gas from said decontamination unit to said enclosure;
a return conduit defining a flow path for conveying said carrier gas from said enclosure to said decontamination unit;
a barrier assembly for sealing an opening of said enclosure, said barrier assembly including:
a membrane traversing said opening of said enclosure, said membrane resistant to a vaporized sterilant disposed in said enclosure; and
an inlet port and an outlet port for allowing said carrier gas to flow through the membrane; and

an adjustable frame assembly for securing said membrane of said barrier assembly into said opening of said enclosure, said adjustable frame assembly comprising:
an adjustable upper assembly for holding said membrane in sealing engagement with a top of said opening of said enclosure, said upper assembly having distal ends;
an adjustable lower assembly for holding said membrane in sealing engagement with a bottom of said opening of said enclosure, said lower assembly having distal ends; and
a pair of adjustable side assemblies for holding said membrane in sealing engagement with opposite sides of said opening of said enclosure, each of said pair of side assemblies having distal ends, a notch formed in at least one of said distal ends of each of said pair of side assemblies, said notches defining a first pair of spaced-apart tabs disposed at one of said top of said opening or said bottom of said opening, said first pair of spaced-apart tabs dimensioned to receive one of said upper assembly or said lower assembly and to secure said upper assembly or said lower assembly in a press-fit fashion between said first pair of spaced-apart tabs,
wherein said upper assembly or said lower assembly is inserted between said first pair of spaced-apart tabs from a front of said adjustable frame assembly, and
wherein lengths of said upper assembly, said lower assembly and said pair of side assemblies are independently adjustable for independently varying a length of each side of said adjustable frame assembly.

12. The apparatus as defined in claim 11 , wherein said membrane is disposed between said adjustable frame assembly and said enclosure such that said adjustable frame assembly does not contact said vaporized sterilant in said enclosure.

13. The apparatus defined in claim 12 , wherein said side assembly includes elongated telescoping sections dimensioned to extend the length of said side of said opening.

14. The apparatus defined in claim 12 , where

Assignees

• American Sterilizer Co

Inventors

• Hill Aaron L
• Bruskevith Ryan A
• Logue Leslie M
• Warren William D

Classifications

• A61L2/22 Primary

  Phase substances, e.g. smokes or aerosols · CPC title

• A61L2/186

  Peroxide solutions · CPC title

• A61L2202/15

  Biocide distribution means, e.g. nozzles, pumps, manifolds, fans, baffles, sprayers · CPC title