Ultraviolet Gradient Sterilization, Disinfection, and Storage System

[0001] The current application claims the benefit of co-pending U.S. Provisional Application No. 61/694,238, titled “Ultraviolet Smart Gradient Sterilization, Disinfection, and Storage Systems,” which was filed on 28 Aug. 2012, and which is hereby incorporated by reference.

[0002] The disclosure relates generally to ultraviolet radiation, and more particularly, to a solution for sterilizing, disinfecting, and/or the like, a storage area of a storage device using ultraviolet radiation.

[0003] Reliable, hygienic storage of sanitary and biological items, such as food, is a major problem. For example, the problem is present throughout the food industry, e.g., manufacturers, retailers, restaurants, and in every household, and is especially significant for food service establishments, in which related issues of food quality control also are significant. In addition to food storage and quality control in fixed locations (e.g., a refrigerator) where access to electricity is readily available, proper food storage and quality control also is important in situations for which access to unlimited electricity and/or a stationary storage device, such as a refrigerator, is not available, such as picnics, camping, mobile food kiosks, hospitality or battlefield meal locations, search and rescue, etc. In addition to food, other stored items also require hygienic storage. For example, medical and chemical equipment, construction wood, etc., also require storage in a biologically safe environment. Since ambient temperature significantly affects bacterial activity, effective control of the ambient temperature is an important tool in ensuring reliable, hygienic storage of various items.

[0004] Fresh food products can be processed using ultraviolet light as a germicidal medium to reduce the food-born microbial load. Water has been treated with ultraviolet light to provide safe drinking water for quite some time. Fruit and vegetable products capable of being pumped through a system generally are very suitable for processing by ultraviolet light to reduce the microbial load. Today, most of these products are pasteurized to obtain microbiologically safe and nutritious products. However, pasteurization can change the taste and flavor of such products because of the temperature and processing time. Juices from different sources can be treated by exposure to ultraviolet light at different doses. On the other hand, variables such as exposure time, type of fruit product, juice color and juice composition, among other variables, need to be studied to obtain fruit products with reduced microbial load, increased shelf life and adequate sensory and nutritional characteristics. Reduction of microbial load through ultraviolet light application as a disinfection medium for food products other than liquids also is being studied. Moreover, ultraviolet technology could be a source for pasteurization of liquids, or disinfection of solid foods as an alternative technology, instead of thermal treatment or application of antimicrobial compounds.

[0005] In general, ultraviolet (UV) light is classified into three wavelength ranges: UV-C, from about 200 nanometers (nm) to about 280 nm; UV-B, from about 280 nm to about 315 nm; and UV-A, from about 315 nm to about 400 nm. Generally, ultraviolet light, and in particular, UV-C light is “germicidal,” i.e., it deactivates the DNA of bacteria, viruses and other pathogens and thus destroys their ability to multiply and cause disease. This effectively results in sterilization of the microorganisms. Specifically, UV-C light causes damage to the nucleic acid of microorganisms by forming covalent bonds between certain adjacent bases in the DNA. The formation of these bonds prevents the DNA from being “unzipped” for replication, and the organism is neither able to produce molecules essential for life process, nor is it able to reproduce. In fact, when an organism is unable to produce these essential molecules or is unable to replicate, it dies. UV light with a wavelength of approximately between about 250 to about 280 nm provides the highest germicidal effectiveness. While susceptibility to UV light varies, exposure to UV energy for about 20 to about 34 milliwatt-seconds/cm² is adequate to deactivate approximately 99 percent of the pathogens.

[0006] Various approaches have sought to use ultraviolet light to disinfect a compartment, such as compartments found in refrigerators. For example, one approach proposes a plurality of small, low current UV lights which utilize the standard circuitry of the refrigerator to power the UV light source. Another approach uses a UV lamp installed in a top portion of the refrigerator and reflective lining throughout the interior to reflect the UV radiation throughout the compartment. Another approach provides a UV system with a single UV source attached to an internal sidewall of a refrigerator to radiate light to the entire compartment, or in the alternative, provide UV exposure to a limited compartment. Still another approach proposes an air cleaner for an internal compartment of a refrigerator, which utilizes a UV filter to reduce pathogens in the re-circulated air. Still another approach provides a refrigerator with UV light irradiation components to eradicate low-level light from the storage containers contained therein to promote freshness of foodstuffs.

[0007] The inventors provide a solution for the sterilization, preservation, disinfection, decontamination, and/or the like, of a storage area of a storage device using ultraviolet radiation. For example, an embodiment is configured to scan and monitor the storage area for the presence of microorganisms and apply ultraviolet radiation at designated zones within the storage area to preserve, sterilize, disinfect, decontaminate, and/or the like, the storage area. Similarly, this solution may be implemented as part of other storage environments, such as pantries, grocery bags, boxes, biological object storage containers, and/or the like.

[0008] Aspects of the invention provide a solution in which ultraviolet radiation is directed within an area. The storage area is scanned and monitored for the presence of biological activity within designated zones. Once biological activity is identified, ultraviolet radiation is directed to sterilize and disinfect designated zones within the storage area.

[0009] A first aspect of the invention provides a system comprising: at least one ultraviolet radiation source configured to generate ultraviolet radiation directed within a storage area; and a monitoring and control system for managing the storage area by performing a method comprising: monitoring at least one of: the storage area or a set of items located in the storage area; and controlling ultraviolet radiation generated by the at least one ultraviolet radiation source based on the monitoring by delivering a targeted ultraviolet radiation to at least one designated zone within the storage area.

[0010] A second aspect of the invention provides a food storage device comprising: a storage area configured to store at least one perishable food item; at least one ultraviolet radiation source configured to generate ultraviolet radiation directed within the storage area; and a monitoring and control system for managing the storage area by performing a method comprising: monitoring at least one of: the storage area or a set of items located in the storage area; and controlling ultraviolet radiation generated by the at least one ultraviolet radiation source based on the monitoring by delivering a targeted ultraviolet radiation to at least one designated zone within the storage area.

[0011] A third aspect of the invention provides a refrigeration device comprising: a storage area configured to store at least one refrigerated item; a component configured to control at least one environmental condition of the storage area, wherein the at least one environmental condition includes at least one of: a temperature, a humidity, a gas convection, or a fluid convection; at least one ultraviolet radiation source configured to generate ultraviolet radiation directed within the storage area; and a monitoring and control system for managing the storage area by performing a method comprising: monitoring at least one of: the storage area or a set of items located in the storage area; and controlling ultraviolet radiation generated by the at least one ultraviolet radiation source based on the monitoring by delivering a targeted ultraviolet radiation to at least one designated zone within the storage area.

[0012] The illustrative aspects of the invention are designed to solve one or more of the problems herein described and/or one or more other problems not discussed.

[0022] It is noted that the drawings may not be to scale. The drawings are intended to depict only typical aspects of the invention, and therefore should not be considered as limiting the scope of the invention. In the drawings, like numbering represents like elements between the drawings.

[0023] As indicated above, aspects of the invention provide a solution in which ultraviolet radiation is shone within an area. The storage area can be scanned and monitored for the presence of biological activity within designated zones of the storage area. Once biological activity is identified in a zone, ultraviolet radiation is directed to sterilize and disinfect the zone. As used herein, unless otherwise noted, the term “set” means one or more (i.e., at least one) and the phrase “any solution” means any now known or later developed solution. Furthermore, as used herein, ultraviolet radiation/light means electromagnetic radiation having a wavelength ranging from approximately 10 nanometers (nm) to approximately 400 nm, while ultraviolet-C (UV-C) means electromagnetic radiation having a wavelength ranging from approximately 100 nm to approximately 280 nm, ultraviolet-B (UV-B) means electromagnetic radiation having a wavelength ranging from approximately 280 to approximately 315 nanometers, and ultraviolet-A (UV-A) means electromagnetic radiation having a wavelength ranging from approximately 315 to approximately 400 nanometers. As also used herein, a material/structure is considered to be “reflective” to ultraviolet light of a particular wavelength when the material/structure has an ultraviolet reflection coefficient of at least thirty percent for the ultraviolet light of the particular wavelength. In a more particular embodiment, a highly ultraviolet reflective material/structure has an ultraviolet reflection coefficient of at least eighty percent. Furthermore, a material/structure is considered to be “transparent” to ultraviolet light of a particular wavelength when the material/structure allows a significant amount of the ultraviolet radiation to pass there through. In an embodiment, the ultraviolet transparent structure is formed of a material and has a thickness, which allows at least ten percent of the ultraviolet radiation to pass there through.

[0024] Turning to the drawings, FIG. 1 shows an illustrative ultraviolet radiation system 10 according to an embodiment. In this case, the system 10 includes a monitoring and/or control system 11, which is implemented as a computer system 20 including an analysis program 30, which makes the computer system 20 operable to manage an ultraviolet (UV) radiation source 12 by performing a process described herein. In particular, the analysis program 30 can enable the computer system 20 to operate the UV radiation source 12 to generate and direct ultraviolet radiation within an area and process data corresponding to one or more conditions of the area and/or an item located in the area, which is acquired by a feedback component 14. While a single UV radiation source 12 is shown, it is understood that the area can include any number of UV radiation sources 12, the operation of which the computer system 20 can separately manage using a process described herein.

[0025] In an embodiment, during an initial period of operation (e.g., after recent access to the area, addition/removal/reconfiguration of item(s) placed within the area, and/or the like), the computer system 20 can acquire data from the feedback component 14 regarding one or more attributes of the items in the area and/or conditions of the area and generate analysis data 42 for further processing. The analysis data 42 can include information on the color, appearance, and/or the like, of items in the area, the presence of microorganisms on the items or within the area, and/or the like. Furthermore, the analysis data 42 can include information on the presence of ethylene gas within the area. The computer system 20 can use the analysis data 42 to generate calibration data 40 for controlling one or more aspects of the ultraviolet radiation generated by the ultraviolet radiation source(s) 12 using one of a plurality of selectable operating configurations as discussed herein. Furthermore, one or more aspects of the operation of the ultraviolet radiation source 12 can be controlled by a user 6 via an external interface component 26B.

[0026] The computer system 20 is shown including a processing component 22 (e.g., one or more processors), a storage component 24 (e.g., a storage hierarchy), an input/output (I/O) component 26A (e.g., one or more I/O interfaces and/or devices), and a communications pathway 28. In general, the processing component 22 executes program code, such as the analysis program 30, which is at least partially fixed in the storage component 24. While executing program code, the processing component 22 can process data, which can result in reading and/or writing transformed data from/to the storage component 24 and/or the I/O component 26A for further processing. The pathway 28 provides a communications link between each of the components in the computer system 20. The I/O component 26A and/or the external interface component 26B can comprise one or more human I/O devices, which enable a human user 6 to interact with the computer system 20 and/or one or more communications devices to enable a system user 6 to communicate with the computer system 20 using any type of communications link. To this extent, during execution by the computer system 20, the analysis program 30 can manage a set of interfaces (e.g., graphical user interface(s), application program interface, and/or the like) that enable human and/or system users 6 to interact with the analysis program 30. Furthermore, the analysis program 30 can manage (e.g., store, retrieve, create, manipulate, organize, present, etc.) the data, such as calibration data 40 and analysis data 42, using any solution.

[0027] In any event, the computer system 20 can comprise one or more general purpose computing articles of manufacture (e.g., computing devices) capable of executing program code, such as the analysis program 30, installed thereon. As used herein, it is understood that “program code” means any collection of instructions, in any language, code or notation, that cause a computing device having an information processing capability to perform a particular function either directly or after any combination of the following: (a) conversion to another language, code or notation; (b) reproduction in a different material form; and/or (c) decompression. To this extent, the analysis program 30 can be embodied as any combination of system software and/or application software.

[0028] Furthermore, the analysis program 30 can be implemented using a set of modules 32. In this case, a module 32 can enable the computer system 20 to perform a set of tasks used by the analysis program 30, and can be separately developed and/or implemented apart from other portions of the analysis program 30. When the computer system 20 comprises multiple computing devices, each computing device can have only a portion of the analysis program 30 fixed thereon (e.g., one or more modules 32). However, it is understood that the computer system 20 and the analysis program 30 are only representative of various possible equivalent monitoring and/or control systems 11 that may perform a process described herein. To this extent, in other embodiments, the functionality provided by the computer system 20 and the analysis program 30 can be at least partially implemented by one or more computing devices that include any combination of general and/or specific purpose hardware with or without program code. In each embodiment, the hardware and program code, if included, can be created using standard engineering and programming techniques, respectively. In another embodiment, the monitoring and/or control system 11 can be implemented without any computing device, e.g., using a closed loop circuit implementing a feedback control loop in which the outputs of one or more sensing devices are used as inputs to control the operation of one or more other devices (e.g., LEDs). Illustrative aspects of the invention are further described in conjunction with the computer system 20. However, it is understood that the functionality described in conjunction therewith can be implemented by any type of monitoring and/or control system 11.

[0029] Regardless, when the computer system 20 includes multiple computing devices, the computing devices can communicate over any type of communications link. Furthermore, while performing a process described herein, the computer system 20 can communicate with one or more other computer systems, such as the user 6, using any type of communications link. In either case, the communications link can comprise any combination of various types of wired and/or wireless links; comprise any combination of one or more types of networks; and/or utilize any combination of various types of transmission techniques and protocols. This communications link, which can include a wireless or cable based transmission, can be utilized to transmit information about the state of one or more items and/or zones within the storage area 54.

[0030] The system 10 can be implemented within an existing storage device (e.g., a refrigerator) using any solution. For example, one or more ultraviolet radiation sources 12 and one or more devices included in a feedback component 14 can be fixed within various locations in the storage device (e.g., on walls, shelves, etc.) and configured for operation by the computer system 20. The locations of devices in the ultraviolet radiation source(s) 12 and/or the feedback component 14 can be selected to provide comprehensive coverage of the storage area (or a zone therein) of the storage device and the items located within the storage area. In an embodiment, the computer system 20 can be located outside of the storage area of the storage device.

[0031] The ultraviolet radiation source 12 can comprise any combination of one or more ultraviolet radiation emitters. For example, the UV source 12 can include a high intensity ultraviolet lamp (e.g., a high intensity mercury lamp), an ultraviolet light emitting diode (LED), and/or the like. In an embodiment, the UV source 12 includes a set of light emitting diodes manufactured with one or more layers of materials selected from the group-III nitride material system (e.g., Al_xIn_yGa_1-X-YN, where 0≦x, y≦1, and x+y≦1 and/or alloys thereof). Additionally, the UV source 12 can comprise one or more additional components (e.g., a wave guiding structure, a component for relocating and/or redirecting ultraviolet radiation emitter(s), etc.) to direct and/or deliver the emitted radiation to a particular location/area, in a particular direction, in a particular pattern, and/or the like, within the storage area. Illustrative wave guiding structures include, but are not limited to, a plurality of ultraviolet fibers, each of which terminates at an opening, a diffuser, and/or the like. The computer system 12 can independently control each UV source 12.

[0032] The system 10 also can include an alarm component 23, which can be operated by the computer system 20 to indicate when ultraviolet radiation is being directed within the storage area. The alarm component 23 can include one or more devices for generating a visual signal, an auditory signal, and/or the like. For example, in the example shown in FIG. 5A, where the storage device 52 includes a refrigeration device, a panel 8 can display a flashing light, text, an image, and/or the like, to indicate that ultraviolet radiation is currently being directed into a corresponding storage area 54. Furthermore, the alarm component 23 can generate a noise, such as a bell, a beep, and/or the like, to indicate that ultraviolet radiation is currently being directed to the storage area 54. In an alternative embodiment, the alarm system 23 can indicate when a maximum level of ultraviolet radiation is reached within the storage area, when microorganisms are detected within the storage area, a growth state of the microorganisms (e.g., reproducing or not reproducing), a location of the microorganisms (e.g., a zone), and/or the like.

[0033] The computer system 20 is configured to control and adjust a direction, an intensity, a pattern, and/or a spectral power (e.g., wavelength) of the UV sources 12. The computer system 20 can control and adjust each property of the UV source 12 independently. For example, the computer system 20 can adjust the intensity, time duration, and/or time scheduling (e.g., including duration (e.g., exposure/illumination time), duty cycle, time between exposures/illuminations, and/or the like) of the UV source 12 for a given wavelength. Each of the properties of the UV sources 12 can be adjustable and controlled by the computer system 20 according to data provided by the feedback system 14. The computer system 20 can be configured to adjust the direction of the ultraviolet radiation according to a location of the biological activity using any solution. The computer system 20 can be configured to utilize a target timing, intensity, and/or spectral power of the ultraviolet radiation according to a type of biological activity. In a specific embodiment, where the UV sources 12 are UV LEDs, the wavelengths of UV sources 12 can be between approximately 190 nanometers and approximately 260 nanometers, or between approximately 270 nanometers and approximately 300 nanometers.

[0034] FIG. 3 shows a flow diagram of an illustrative method of operating the system 10 according to an embodiment, which can be implemented by the computer system 20. The computer system 20 can be configured to control the UV source 12 to direct ultraviolet radiation 13 into a storage area 54 of a storage device 52 within which a set of items 56 are located. The feedback component 14 is configured to acquire data used to monitor a set of current conditions of the storage area 54 and/or the items 56 over a period of time. As illustrated in FIG. 2, the feedback component 14 can include a plurality of sensing devices 16, each of which can acquire data used by the computer system 20 to monitor the set of current conditions.

[0035] At P0, the computer system 20, e.g., via sensing devices 16 of the feedback component 14, can scan the storage area 54 at a first time T0 for a first density D0 of a biological activity. At P1, the computer system 20 can scan the storage area 54 at a second time T1 for a second density D1 of the biological activity. For example, in FIG. 2, the sensing device 16 can acquire data corresponding to item 56 within the storage area 54 and a presence of biological activity, such as a microorganism 58, thereon. The sensing device 16 used to scan the storage area 54 can include a visual camera capable of capturing data corresponding to visible light spectra, a chemical sensor capable of capturing data corresponding to one or more chemicals emitted by biological activity, a mechanical sensor (including piezoelectric sensor, various membranes, cantilever, a micro-electromechanical sensor or MEMS, a nanomechanical sensor, and/or the like), and/or the like. A time difference T1-T0 can be a user input parameter (via external interface 26B). In the embodiment of sensing device 16 including a visual camera capable of capturing visible light spectra, it is understood that the UV sources 12 are capable of inducing the biological activity 58 to emit a fluorescence signature that is detected by the visual camera. The visual camera acquires visual images of the storage area 54 that are sent to the computer system 20 and used in processing. In another embodiment, the sensing devices 16 can include a UV detector that is configured to detect ultraviolet radiation within the storage area 54. The absorption of ultraviolet radiation within storage area 54 can indicate the presence of bacteria 56 and/or virus 58. The UV detector can be a solid state ultraviolet radiation detector manufactured with one or more layers of materials selected from the group-III nitride material system (e.g., Al_XIn_YGa_1-X-YN, where 0≦X, Y≦1, and X+Y≦1 and/or alloys thereof). For example, the UV detector can comprise any type of ultraviolet sensing device, such as an ultraviolet-sensitive photodetector (e.g., an ultraviolet photodiode). In an embodiment, the UV detector can be selected based on its sensitivity to a particular, narrow band of ultraviolet light, which can be selected using any solution. Additionally, the UV detector can comprise one or more additional components (e.g., a wave guiding structure, filter, system for moving and/or redirecting ultraviolet detector(s), etc.) to detect ultraviolet radiation in a particular location/direction, and make the UV detector sensitive to a particular range of wavelengths, and/or the like.

[0036] It is understood that the set of current conditions in the storage area 54 that are monitored by the feedback system 14 can include one or more attributes corresponding to a set of biological activity dynamics present within the storage area. The set of biological activity dynamics can include, for example, a presence of biological activity (e.g., exponential bacterial growth), a location of the biological activity, a type of biological activity (e.g., type of organism), a concentration of the biological activity, an estimated amount of time an organism has been in a growth phase (e.g., exponential growth and/or stationary), and/or the like. The set of biological activity dynamics can include information on the variation of the biological activity over time, such as a growth rate, a rate with which an area including the biological activity is spreading, and/or the like. In an embodiment, the set of biological activity dynamics are related to various attributes of bacteria and/or virus activity within an area, including, for example, the presence of detectable bacteria and/or virus activity, measured bacteria and/or virus population/concentration time dynamics, growth phase, and/or the like.

[0037] The feedback component 14 also can include one or more additional devices. For example, the feedback component 14 is shown including a logic unit 17. In an embodiment, the logic unit 17 receives data (e.g., first density D0 and second density D1) from a set of sensing devices 16 and provides data corresponding to the set of conditions of the storage area 54 and/or items 56 located in the storage area 54 for processing by the computer system 20. For example, the logic unit 17 can adjust the operation of one or more of the sensing devices 16, operate a unique subset of the sensing devices 16, and/or the like. In response to data received from the feedback component 14, the computer system 20 can automatically adjust and control one or more aspects of the ultraviolet radiation 13 generated by the ultraviolet radiation source 12. At P3, the computer system 20 can compare the first density D0 and the second density D1 using any solution. For example, the computer system 20 can determine the difference between the first density D0 and the second density D1. If the difference between the first density D0 and the second density D1 is not equal to zero (e.g., not within a range of error), the computer system 20 can determine that the difference corresponds to a growth in biological activity 58. In response, the computer system 20 can operate the UV sources 12 and deliver, at P4, ultraviolet radiation to the targeted zones within storage area 54 where there is a presence of biological activity 58 (e.g., increasing biological activity). The computer system 20 can be configured to adjust the wavelength, intensity, direction, and/or timing of the ultraviolet radiation according to the data received from the sensing devices 16.

[0038] At P5, If a maximum amount of ultraviolet radiation has been directed within the storage area 54, or a maximum number (N_treshold) of iterations of delivering ultraviolet radiation have been performed, at P6, an alarm can be generated by the alarm system 23 (FIG. 1). The maximum amount of ultraviolet radiation and/or the maximum number of iterations (N_threshold) can be set by a user 6 via external interface 26B (FIG. 1).

[0039] If a maximum amount of ultraviolet radiation has not been directed within the storage area 54, or a maximum number of iterations (N_threshold) has not been met, the sensing devices 16 can continue to scan the storage area 54 for biological activity. The system 10 (FIG. 1) will continue to disinfect the items 56 and/or storage area 54 until levels of biological activity at or below an acceptable level are obtained.

[0040] At P7, if the first density D0 and the second density D1 are equal, the computer system 20 determines whether the second density D1 is greater than zero. If the second density D1 is greater than zero, a presence of biological activity is detected; however, the biological activity is not growing (e.g., D0=D1). The computer system 20 can acquire, e.g., via a chemical sensor for biological activity, data corresponding to a presence of ethylene gas, and/or the like. If the data indicates a presence of gas that is over a threshold, at P6, an alarm can be generated via the alarm system 23 (FIG. 1). However, if the second density D1 is not greater than zero, the computer system 20 can continue to scan the storage area 54.

[0041] In an illustrative application, the threshold gas corresponds to a ripeness and/or freshness of food, such as fruit or vegetables, stored in the storage area 54. For example, the feedback component 14 can include a set of ultraviolet LEDs and detectors, which operate in an absorption/transmission mode. In a more specific example, the ultraviolet LEDs and detectors emit/detect ultraviolet radiation having a peak wavelength of approximately 255 nanometers, at which ethylene absorbs. Regardless, the computer system 20 can operate the feedback component 14 to acquire data corresponding to an amount of ethylene gas produced by fruit and/or vegetables located within the storage area 54 (e.g., a concentration of ethylene gas present in a box or container within a refrigerator). Using the data, the computer system 20 can generate an alarm (e.g., indication) corresponding to the state of the fruit and/or vegetables located therein (e.g., not yet ripe, ripe, fresh, no longer fresh, and/or the like).

[0042] In an embodiment, the system 10 can include at least two types of UV sources 12. Referring now to FIG. 8, a perspective view of an illustrative storage device 152 according to an embodiment is shown. The storage device 152 includes a first set of UV sources 12A and a second set of UV sources 12B. The first set of UV sources 12A can be configured to operate in a first operating configuration, such as a sterilization operating configuration 50, while the second set of UV sources 12B can be configured to operate in a second operating configuration, such as a preservation operating configuration 50, or vice versa.

[0043] The storage device 152 can include a plurality of sub-compartments (e.g., zones) that are individually monitored by the computer system 20 using the feedback component 14 (FIG. 1). The ultraviolet radiation sources 12 in each sub-compartment can be individually controlled by the computer system 20. For example, a shelf 72 can be partitioned into a first sub-compartment 76 and a second sub-compartment 78, which are separated by a divider 80. The computer system 20 can control the UV source 12A to have a first intensity and a first wavelength, and control the UV source 12B to have a second intensity and a second wavelength. For example, the UV source 12A can include a full intensity, while the UV source 12B includes a zero intensity. Conversely, the UV source 12A can include a zero intensity, while the UV source 12B includes a full intensity. Furthermore, the computer system 20 can independently tune the relative intensities of each UV source 12A, 12B, and either UV source 12A, 12B can have any intensity between zero and full.

[0044] As described herein, embodiments can be implemented as part of any of various types of storage systems. FIGS. 4A-4C, 5A-5F, 6A-6B, and 7A-7E show illustrative storage devices for use with an ultraviolet radiation system 10 (FIG. 1) according to embodiments. For example, the storage device can be a refrigerator and/or freezer (FIG. 4A) for storing a plurality of food items. In this embodiment, the computer system 20 can be configured to turn off UV source 12 when a door is open, and automatically turn on UV source 12 when the door is closed. Alternatively, the system 10 can be implemented in a cooler (FIG. 4B). The system 10 can be implemented in a pantry (FIG. 4C, e.g., a shelf in the pantry), and/or the like. The system 10 can be implemented in a food storage container (FIG. 5A), a backpack (FIG. 5B), a grocery bag (FIG. 5C), or a plastic baggie (FIG. 5D). In an alternative embodiment, system 10 may be utilized with an electronic toothbrush (FIG. 5E) or with a mobile touch screen phone (FIG. 5F). The system 10 can also be implemented in a dishwasher (FIG. 6A), or a sushi bar (FIG. 6B). Further, system 10 can be implemented in storage device (FIG. 7A), a vacuum cleaner (FIG. 7B), a floor cleaning robot (FIG. 7C), a floor cleaning machine (FIG. 7D), or a pc tablet case (FIG. 7E). In each case, an embodiment of the system 10 can be implemented in conjunction therewith using any solution. To this extent, it is understood that embodiments of the system 10 can vary significantly in the number of devices, the size of the devices, the power requirements for the system, and/or the like. Regardless, it is understood that these are only exemplary storage devices and that the system 10 may be applicable to other storage devices not specifically mentioned herein.

[0045] Returning to FIG. 2, it is understood that the system 10 may include a power component 19 that is implemented separately from the storage device 52 to supply power to one or more of the various components of system 10, such as ultraviolet radiation sources 12, feedback component 14, computer system 20, and/or the like. For example, the storage device 52 may comprise a cooler or the like, which does not include or otherwise require any power source. Furthermore, the storage device 52 may comprise a power source that is insufficient to operate the various devices of system 10 in addition to maintaining one or more aspects of the environment within the storage area 54 for a desired period of time. Regardless, the power component 19 can be utilized to operate system 10. The power component 19 can comprise any source of power including, but not limited to, the power grid, a battery set, an automotive charger, a solar cell, and/or the like. In an embodiment, the computer system 20 can implement multiple modes of operation depending on the source of power. In particular, when a power component 19 of limited capacity is being utilized, one or more functions of system 10 can be disabled and/or reduced to lengthen an operating time for system 10. For example, use of ultraviolet radiation source 12 to prolong the life of items within the storage area 54 or disinfect the storage area 54 by generating a higher intensity of ultraviolet radiation can be disabled.

[0046] An environment within the storage area 54 can be controlled by an environmental control component 18. In an illustrative implementation, the environmental control component 18 can comprise a temperature control module, a humidity control module, and/or a convection control module. During normal operation of the environmental control component 18, a user 6 (FIG. 1) (e.g., using external interface component 26B) can select a desired temperature, humidity, and/or the like, to maintain within storage area 54. The environmental control component 18 can subsequently operate one or more cooling/heating components of temperature control module to maintain the desired temperature, operate one or more humidifying/dehumidifying components of humidity control module to maintain the desired humidity, operate one or more air or fluid convection components (e.g., fan, pump, vent, valve, etc.) of convection control module to assist in maintaining a relatively even temperature/humidity within storage area 54, and/or the like. Alternatively, local temperature control within storage area 54 can be maintained by cool air recirculation that is controlled by the environmental control component 18.

[0047] The computer system 20 can be configured to adjust one or more operating parameters of the environmental control component 18 based on a set of current conditions in the storage area 54 and/or an operating configuration 50 of the UV radiation source 12. For example, the computer system 20 can adjust one or more of: a temperature, a humidity, a gas convection, and/or a fluid convection of the storage area 54 in response to a set of biological activity dynamics and according to a currently selected operating configuration. To this extent, each operating configuration can further define a set of target environmental conditions for use during the UV illumination. Such environmental conditions can include a target temperature, a target humidity, additional illumination by non-ultraviolet sources (e.g., visible, infrared), air circulation, and/or the like. Furthermore, one or more of the environmental conditions can change over time during implementation of the operating configuration. In an illustrative embodiment, the computer system 20 can operate the environmental control component 18 to circulate air into a chamber 60. The chamber 60 may be a source of ethylene or other gas and the computer system 20 can control chamber 60 to calibrate exposure of stored articles to such gas. The storage area 52 can also include catalysts 62 for enhancing the suppression of the biological activity, such as, titanium dioxide. Furthermore, the set of current conditions in the storage area 54 can include an operating condition of one or more components of the system 10, such as the ultraviolet radiation source(s) 12. Information regarding the operating condition can be used to, for example, notify a user 6 of a problem using the alarm component 23, alter one or more aspects of an operating configuration, and/or the like. Additionally, the set of current conditions in the storage area 54 can include data corresponding to a dose of ultraviolet radiation delivered by an ultraviolet radiation source 12 during a predetermined time period. In this case, the computer system 20 can dynamically determine when to turn off the ultraviolet radiation source 12.

[0048] As described herein, aspects of the invention can be implemented to treat (e.g., preserve, disinfect, and/or the like) various types of food stored in various types of environments. A typical environment can comprise a refrigerated environment, in which food is frequently stored to extend the shelf life of the food. However, embodiments can be implemented in other non-refrigerated environments, in which food is stored for a period of time, e.g., to ripen, prior to being used, and/or the like. Furthermore, an embodiment can be implemented in conjunction with a freezer, in which the temperature is maintained well below the freezing point of water. To this extent, the types of food items to which aspects of the invention can be implemented can include various types of food as described herein. As described herein, the foods can include various types of fruits and vegetables. However, the foods also can include frozen consumables, such as ice cubes, ice cream, and/or the like. Furthermore, the foods can include liquids, grains, cereals, and/or the like. Additionally, as described herein, embodiments can be implemented to treat non-food items stored in any type of environment. Such non-food items can include, for example, frozen/liquid chemicals, sand, wood, and/or the like. Regardless, it is understood that a treated item can be ultraviolet transparent (e.g., semi-transparent), ultraviolet absorbing, and/or ultraviolet reflective.

[0049] While shown and described herein as a method and system for managing a storage area, it is understood that aspects of the invention further provide various alternative embodiments. For example, in one embodiment, the invention provides a computer program fixed in at least one computer-readable medium, which when executed, enables a computer system to manage the storage area using a process described herein. To this extent, the computer-readable medium includes program code, such as the analysis program 30 (FIG. 1), which enables a computer system to implement some or all of a process described herein. It is understood that the term “computer-readable medium” comprises one or more of any type of tangible medium of expression, now known or later developed, from which a copy of the program code can be perceived, reproduced, or otherwise communicated by a computing device. For example, the computer-readable medium can comprise: one or more portable storage articles of manufacture; one or more memory/storage components of a computing device; paper; and/or the like.

[0050] In another embodiment, the invention provides a method of providing a copy of program code, such as the analysis program 30 (FIG. 1), which enables a computer system to implement some or all of a process described herein. In this case, a computer system can process a copy of the program code to generate and transmit, for reception at a second, distinct location, a set of data signals that has one or more of its characteristics set and/or changed in such a manner as to encode a copy of the program code in the set of data signals. Similarly, an embodiment of the invention provides a method of acquiring a copy of the program code, which includes a computer system receiving the set of data signals described herein, and translating the set of data signals into a copy of the computer program fixed in at least one computer-readable medium. In either case, the set of data signals can be transmitted/received using any type of communications link.

[0051] In still another embodiment, the invention provides a method of generating a system for managing the storage area. In this case, the generating can include configuring a computer system, such as the computer system 20 (FIG. 1), to implement a method of managing the storage area as described herein. The configuring can include obtaining (e.g., creating, maintaining, purchasing, modifying, using, making available, etc.) one or more hardware components, with or without one or more software modules, and setting up the components and/or modules to implement a process described herein. To this extent, the configuring can include deploying one or more components to the computer system, which can comprise one or more of: (1) installing program code on a computing device; (2) adding one or more computing and/or I/O devices to the computer system; (3) incorporating and/or modifying the computer system to enable it to perform a process described herein; and/or the like.

[0052] The foregoing description of various aspects of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously, many modifications and variations are possible. Such modifications and variations that may be apparent to an individual in the art are included within the scope of the invention as defined by the accompanying claims.