ICE MAKER CONTAMINATION CONTROL SYSTEM
An ice maker contamination control system is disclosed for decontaminating components of an ice maker, and in particular, components of an ice formation housing. The ice maker contamination control system may be configured to kill fungi, bacteria, viruses, yeast and mold. The ice maker contamination control system may include at least one ultraviolet light source adapted to be positioned in an ice formation housing of an ice maker for emitting ultraviolet light in the ice formation housing. A reflective covering adapted to be attached to at least a portion of internal surfaces exposed to the at least one ultraviolet light sources. A combined ultraviolet light mounting bracket and reflector may be included for supporting the at least one ultraviolet source in the ice formation housing of the ice maker.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/022,666, filed Jan. 22, 2008, the entirety of which is incorporated by reference herein.
FIELD OF THE INVENTIONThis disclosure is directed generally to ice makers, and more particularly, to contamination control systems for ice makers.
BACKGROUNDOrganic contamination, such as algal, fungal, bacterial, and viral contamination, of the re-circulating water system and ice production components is a widespread problem in ice making machines and is a potential source of contamination of the ice produced. Organic growth has been found growing in water sumps, ice production trays, and ice bins as well as the internal surfaces of the system. This contamination if un-checked can contribute to illnesses and diseases from the ingestion of the contaminated ice.
SUMMARY OF THE INVENTIONAn ice maker contamination control system is disclosed for application in ice makers. The ice maker contamination control system controls organic contamination that can occur within the confines of the ice maker and internal cavity. The ice maker contamination control system uses ultraviolet light to maintain components that are susceptible to organic growth and fouling through the use of the germicidal ultraviolet light. In at least one embodiment, the ice maker contamination control system may include at least one ultraviolet light source adapted to be positioned in the ice formation housing of an ice maker for emitting ultraviolet light in the ice formation housing to irradiate internal surfaces of the ice formation housing, ice formation components, and ambient environment surrounding the ice formation components within the ice formation housing.
The ice maker contamination control system may be included within an ice maker during manufacturing of the ice maker or as a retrofit of an existing ice maker. The ice maker may include an ice formation housing that contains ice formation components for forming ice and include an ice maker contamination control system with one or more ultraviolet light sources positioned in the ice formation housing for emitting ultraviolet light in the ice formation housing. The ultraviolet light source may be an ultraviolet lamp that emits ultraviolet light in a spectrum of about 254 nM or about 185 nM, or both. The ultraviolet light emitted at 185 nM kills odors that may exist in the ice formation housing. In at least one embodiment, less than ten percent of the at least one ultraviolet light source emits ultraviolet light at about 185 nM. In other embodiments, other combinations of the ultraviolet light in spectrums of about 254 nM and about 185 nM may be used. For instance, more than ten percent of the at least one ultraviolet light source may emit ultraviolet light at about 185 nM. The ultraviolet light source may also be coated with polytetrafluoroethylene to seal the lamp from moisture, breakage, and contamination.
The ice maker contamination control system may also include a combined ultraviolet light mounting bracket and reflector positioned in the ice formation housing and supporting the ultraviolet light source. The combined ultraviolet light mounting bracket and reflector may have a generally u-shaped cross-sectional shape. The combined ultraviolet mounting bracket and reflector may extend a length of the ultraviolet light source and provide coverage to at least about 180 degrees of the ultraviolet light source. The combined ultraviolet light mounting bracket and reflector may be formed from uniformly curved stainless steel. In another embodiment, the combined ultraviolet mounting bracket and reflector may be an L-shaped bracket.
The ice maker contamination control system may also include a reflective covering attached to at least a portion of internal surfaces exposed to the ultraviolet light source. The reflective covering may be a reflective tape attached to internal surfaces exposed to the at least one ultraviolet light sources. The ice maker contamination control system may also include an absorbing covering attached to at least a portion of internal surfaces exposed to the ultraviolet light source.
The ice maker contamination control system may also include an extended operating range power supply, weather resistant lamp cable and related mounting hardware. The ice maker contamination control system may include a clear mounting tube with end caps to contain the ultraviolet light apparatus and an insert to secure the apparatus during transport and display for sale. The power source may power the ultraviolet light source and may have an extended operating range power supply that may receive power from the main line voltage source found within the ice maker. The weather resistant lamp cable may be attached to the power supply. The weather resistant lamp cable may supply power to the ultraviolet light source and may be weather resistant to handle the inherent moist nature found within the ice maker.
The ice maker contamination control system include a method of reducing ambient contamination through the combination of ultraviolet light spectrums emitted by the ultraviolet light source. The combination of ultraviolet spectrums produces an ultraviolet oxidative effect that increases the ultraviolet radiation's reactivity with ambient contaminants upon which the ultraviolet light may not shine on directly.
An advantage of this invention is that the ice maker contamination control system controls organic contamination that can occur within the confines of the ice maker and internal cavity. In particular, the ice maker contamination control system kills fungi, bacteria, yeast and mold and other contaminants on components of an ice maker within an ice formation housing.
These and other components are described in more detail below.
The accompanying drawings, which are incorporated in and form a part of the specification, illustrate embodiments of the presently disclosed invention and, together with the description, disclose the principles of the invention.
As shown in
As shown in
The ice maker contamination control system 10 may include one or more ultraviolet light sources 16, as shown in
The ultraviolet light source 16 may include a coating 30 to prevent damage to the ultraviolet light source 16 from exposure to moisture, breakage and mercury contamination. In at least one embodiment, the coating 30 may be formed from a polytetrafluoroethylene, such as, but not limited to, TEFLON. The coating 30 provides an intrinsic seal to the ultraviolet light source 16 such that it is able to withstand the wet conditions as well as provide a safety coating to the ultraviolet light source 16 to protect it from environmental contamination due to mercury contained with the lamp and caused by breakage.
The ultraviolet light source 16 may also include a cable “pigtail” 32, as shown in
As shown schematically in
As shown in
The curved ultraviolet light mounting bracket and reflector 20 acts as a mounting and supporting mechanism for the ultraviolet light source 16. The ultraviolet light mounting bracket and reflector 20 may include holes for mounting and cut-outs for supporting the ultraviolet light source 16 with special rubber o-rings. The mounting holes of the U-shaped ultraviolet light mounting bracket and reflector 20 provide a varying degree of angles for optimum exposure of the UV light to the surfaces intended for exposure. The U-shaped ultraviolet light mounting bracket and reflector 20 may also acts as a UV light reflector to direct the UV light onto the surfaces needed to be treated and away from surfaces sensitive to the UV light. The U-shaped mounting bracket is a universal mounting apparatus intended to give the maximum amount of mounting opportunities to the installer to achieve the optimum exposure potential of the UV light source. In another embodiment, as shown in
The ice maker contamination control system 10 may include a reflective covering 22 attached to at least a portion of internal surfaces 18 exposed to the ultraviolet light source 16. The reflective covering 22 may be any appropriate material, and in at least one embodiment, may be a reflective tape attached to the internal surfaces 18 exposed to the at least one ultraviolet light source 16. In other embodiments, as shown in Figure the ice maker contamination control system 10 may include an absorbing covering 28 attached to at least a portion of internal surfaces 18 exposed to the ultraviolet light source 16. The absorbing covering 28 may be any appropriate material.
The ice maker contamination control system 10 may be sold as a kit to retrofit currently existing ice makers. As shown in
The ice maker contamination control system 10 may also include an operating voltage power supply 24 and appropriate wire harnesses, as shown in
The power supply 24 may contain three incoming power leads, including: one white, one black and one green for connection to the low voltage supply source. In addition, the power supply 24 may also contain a weather resistant lamp supply cable for connection to the ultraviolet light source 16. The supply cable may be weather resistant because the operating conditions in which the ice maker contamination control system 10 is applied is often times in highly wet or damp conditions found within the interior of ice makers 12 that could damage the cables operation otherwise. In addition, as shown in
During use, the ultraviolet light source 16 may irradiate ultraviolet light continuously or at intervals. The ultraviolet light may prevent growth and kill existing microbial contamination. In particular, the ultraviolet light may prevent growth and kill existing microbial contamination on the internal surfaces 18, the ice formation components 13, including the water sump tray 15, and the ambient environment 19. The reflective covering 22 and the absorbing covering 28 may prevent damage from occurring to portions of the ice formation housing 14.
The foregoing is provided for purposes of illustrating, explaining, and describing embodiments of this invention. Modifications and adaptations to these embodiments will be apparent to those skilled in the art and may be made without departing from the scope or spirit of this invention.
Claims
1. An ice maker, comprising:
- an ice formation housing that contains ice formation components for forming ice;
- an ice maker contamination control system formed from at least one ultraviolet light source positioned in the ice formation housing for emitting ultraviolet light to irradiate internal surfaces of the ice formation housing, the ice formation components, and ambient environment surrounding the ice formation components within the ice formation housing.
2. The ice maker of claim 1, further comprising a reflective covering attached to at least a portion of internal surfaces exposed to the at least one ultraviolet light sources.
3. The ice maker of claim 1, further comprising an absorptive covering attached to at least a portion of internal surfaces exposed to the at least one ultraviolet light sources.
4. The ice maker of claim 1, further comprising a combined ultraviolet light mounting bracket and reflector positioned in the ice formation housing and supporting the at least one ultraviolet light source.
5. The ice maker of claim 4, wherein the combined ultraviolet light mounting bracket and reflector has a generally u-shaped cross-sectional shape.
6. The ice maker of claim 5, wherein the combined ultraviolet light mounting bracket and reflector is formed from uniformly curved stainless steel.
7. The ice maker of claim 5, wherein the combined ultraviolet mounting bracket and reflector extends a length of the at least one ultraviolet light source and provides coverage to at least about 180 degrees of the at least one ultraviolet light source.
8. The ice maker of claim 1, wherein the at least one ultraviolet light source is positioned within the ice formation housing an L-shaped bracket.
9. The ice maker of claim 1, wherein the at least one ultraviolet light source is coated with polytetrafluoroethylene to seal the lamp from moisture, breakage, and contamination.
10. The ice maker of claim 1, wherein the at least one ultraviolet light source emits ultraviolet light in a spectrum of about 254 nM.
11. The ice maker of claim 11, wherein the at least one ultraviolet light source emits ultraviolet light in a spectrum of about 185 nM.
12. The ice maker of claim 10, wherein less than ten percent of the at least one ultraviolet light source emits ultraviolet light at about 185 nM.
13. The ice maker of claim 10, wherein greater than ten percent of the at least one ultraviolet light source emits ultraviolet light at about 185 nM.
14. The ice maker of claim 1, wherein the at least one ultraviolet light source is positioned in the ice formation housing to irradiate water contained within the water sump tray.
15. An ice maker contamination control system, comprising:
- at least one ultraviolet light source adapted to be positioned in an ice formation housing of an ice maker for emitting ultraviolet light in the ice formation housing to irradiate internal surfaces of the ice formation housing and ambient environment surrounding the ice formation components within the ice formation housing;
- a reflective covering adapted to be attached to at least a portion of internal surfaces exposed to the at least one ultraviolet light source; and
- a combined ultraviolet light mounting bracket and reflector for supporting the at least one ultraviolet source in the ice formation housing of the ice maker.
16. The ice maker contamination control system of claim 15, wherein the at least one ultraviolet light source emits ultraviolet light in a spectrum of about 254 nM and about 185 nM.
17. The ice maker contamination control system of claim 16, wherein less than ten percent of the at least one ultraviolet light source emits ultraviolet light at about 185 nM.
18. The ice maker contamination control system of claim 15, wherein the combined ultraviolet light mounting bracket and reflector has a generally u-shaped cross-sectional shape and is formed from uniformly curved stainless steel.
19. The ice maker contamination control system of claim 15, wherein the combined ultraviolet mounting bracket and reflector extends a length of the at least one ultraviolet light source and provides coverage to at least about 180 degrees of the at least one ultraviolet light source.
20. The ice maker contamination control system of claim 15, wherein the at least one ultraviolet light source is coated with polytetrafluoroethylene to seal the lamp from moisture, breakage and contamination.
Type: Application
Filed: May 30, 2008
Publication Date: Jul 23, 2009
Inventor: CHRISTOPHER C. WILLETTE (Tequesta, FL)
Application Number: 12/130,191
International Classification: F25D 23/00 (20060101); F25C 1/00 (20060101);