Food sanitizing cabinet

• US 6,784,440 B2
• Filed: 07/26/2002
• Issued: 08/31/2004
• Est. Priority Date: 07/26/2002
• Status: Expired due to Fees

• Current Assignee: BOC, Inc.
• Original Assignee: BOC, Inc.
• Inventors: Fink, Ronald G., Ellis, Walter, Bearsall, Charles
• Primary Examiner(s): Lee, John R.
• Assistant Examiner(s): Hughes, James P.
• Application Number:
  US10/206,498
• Publication Number:
  US 20040016887A1
• Time in Patent Office: 767 Days
• Field of Search: 250/428, 250/429, 250/430, 250/431, 250/432.R, 250/433, 250/434, 250/435, 250/436, 250/437, 250/438, 250/432, 422/24
• US Class Current: 250/435
• CPC Class Codes: A23L 3/28 with ultraviolet light
• CPC Class Codes: A61L 2/08 Radiation
• CPC Class Codes: A61L 2/10 Ultraviolet radiation

Abstract

A compact, efficient, easy-to-maintain enclosable cabinet for sanitizing a liquid flowing along a cascade within a cabinet body, having a cabinet body, a plurality of troughs directing the liquid along a predetermined path including a cascade within the cabinet body and one or more sanitizing radiation sources for subjecting the liquid to a sanitizing radiation for a predetermined time while flowing along the predetermined path, whereby the liquid is subject to sufficient sanitizing radiation for a predetermined level of sanitization. The sanitizing radiation sources are assemblies having a UV light source, a UV light shield located between the UV light source and the liquid and a rigid internal reflector shield located between the UV light source and the UV light shield.

Claims

1. A compact, efficient, easy-to-maintain enclosable apparatus for sanitizing a liquid flowing along a cascade, comprising:

a cabinet body;

means for directing the liquid along a predetermined path within the cabinet body; and

means for subjecting the liquid to a sanitizing radiation for a predetermined time while flowing along the predetermined path;

wherein the means for directing the liquid comprises a plurality of downward sloping irradiation trays whereby liquid travels from one irradiation tray to another irradiation tray;

whereby the liquid is subject to sufficient sanitizing radiation for a predetermined level of sanitization.

2. The apparatus of claim 1, wherein the downward sloping irradiation trays each comprise offset support brackets whereby liquid travels from one irradiation tray to another irradiation tray.

3. The apparatus of claim 1, wherein one or more irradiation trays comprises one or more elements adapted for increasing the turbulent circulation of the liquid.

4. The apparatus of claim 1, wherein the means for directing liquid further comprises a means for diffusing the liquid before the liquid reaches an irradiation tray so that the liquid flows generally the width of the irradiation tray.

5. The apparatus of claim 1, further comprising:

an ingress for accepting input of the liquid into the interior of the apparatus located generally at the top portion of the apparatus; and

an egress for discharging the liquid after sanitization located generally at the bottom portion of the apparatus.

6. The apparatus of claim 1, wherein each irradiation tray comprises a plurality of elements adapted for increasing circulation of the liquid.

7. The apparatus of claim 1, wherein the means for subjecting the liquid to a sanitizing radiation comprises one or more irradiation assemblies in optical contact with the surface of the liquid.

8. The apparatus of claim 7, wherein an irradiation assembly comprises:

a UV light source; and

a UV light shield located between the UV light source and the liquid.

9. The apparatus of claim 8, wherein the irradiation assembly further comprises a rigid reflector shield located between the UV light source and the UV light shield.

10. The apparatus of claim 9, wherein the reflector shield provides resistance to ease the attachment of the irradiation assembly to the cabinet body and strength to the irradiation assembly to resist damage during maintenance activity including hosing.

11. The apparatus of claim 4, wherein the means for diffusing comprises:

one or more diffusing trays, each diffusing tray including a plurality of voids through the bottom surface of the diffusing tray for diffusing the liquid.

12. The apparatus of claim 1, wherein one or more irradiation trays further comprises one or more down pipes at a downstream position on the irradiation tray.

13. The apparatus of claim 11, wherein one or more diffusing trays further includes a generally c-shaped splash guard piece whereby splash of liquid contacting the diffusing tray is reduced.

14. The apparatus of claim 11, wherein one or more diffusing trays further includes a generally c-shaped splash guard piece wherein splash of liquid contacting the diffusing tray is reduced, and wherein the down pipe is in complementary contact with the splash guard.

15. The apparatus of claim 11, wherein the diffusing tray is easily removable.

16. The apparatus of claim 1, wherein the irradiation tray is easily removable.

17. The apparatus of claim 5, wherein the egress includes a sloping bottom interior surface of the cabinet body toward a hole in gravity flow connection with the sloping bottom.

18. The apparatus of claim 1, wherein the amount of radiation exposure to the liquid is optimized as a function of the opacity of the liquid, the rate of flow of the liquid, the intensity of the source of the sanitizing radiation, the distance between the sanitizing radiation and the liquid and the time the liquid spends under the sanitizing radiation.

19. A modular sanitizing radiation source, comprising:

an irradiation assembly for use in irradiating a liquid flowing in a cascade within an enclosable cabinet, comprising;

a UV light source;

a UV light shield located between the UV light source and the liquid; and

a rigid internal reflector shield located between the UV light source and the UV light shield.

20. The assembly of claim 19, further comprising an endcap fitting assembly located on each end of the UV light shield for attachment of the assembly within the interior of the cabinet.

21. The assembly of claim 20, wherein the endcap fitting assembly comprises:

a rigid endcap fitting having threads, located around the perimeter of the UV light shield;

an endcap having threads which are complementary to those on the sheath located on the exterior of the cabinet; and

a compressive gasket, whereby engagement of the endcap with the endcap fitting generally seals the endcap fitting assembly to the interior of the cabinet.

22. A compact, efficient, easy-to-maintain enclosable cabinet for sanitizing a liquid, comprising:

a cabinet body;

a plurality of troughs directing the liquid along a predetermined path including a cascade between trays within the cabinet body; and

one or more sanitizing radiation sources for subjecting the liquid to a sanitizing radiation for a predetermined time while flowing along the predetermined path;

whereby the liquid is subject to sufficient sanitizing radiation for a predetermined level of sanitization.

23. The cabinet of claim 22, wherein at least one trough comprises:

an irradiation tray oriented so the liquid flows from a first end to a second end;

a down pipe located at the second end;

a diffuser at the first end.

24. The cabinet of claim 22, wherein the sanitizing radiation source comprises an array of UV light sources.

25. The cabinet of claim 23, therein the sanitizing radiation source further comprises at least two horizontal rows of four UV light sources.

26. The cabinet of claim 22, wherein the apparatus includes modules of sanitizing radiation sources comprising:

an irradiation assembly, comprising;

a UV light source;

a UV light shield located between the UV light source and the liquid; and

a rigid internal reflector shield located between the UV light source and the UV light shield.

27. A method for sanitizing a liquid within a compact, efficient, easy-to-maintain enclosable apparatus, comprising the steps of:

providing an ingress for the liquid into a cabinet body;

directing the liquid along a plurality of generally horizontal troughs so that the liquid travels along a predetermined vertical and horizontal path within the cabinet body; and

subjecting the liquid to one or more sanitizing radiation sources for a predetermined time while flowing along the predetermined path,

whereby the liquid is subject to sufficient sanitizing radiation for a predetermined level of sanitization.

28. The method of claim 27, further comprising the step of providing an egress for the liquid after exposure to the sanitizing radiation.