Countertop UV Decontamination Device with Motion Safety
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Solution Overview
Problem
Countertops and other surfaces in kitchens and workspaces often harbor pathogens, and existing decontamination methods, such as chemical washes, may not effectively remove all pathogens, especially when used during food preparation, and can lead to re-contamination due to airborne pathogens and impracticality of constant cleaning.
Innovation Solution
A device using high-intensity ultraviolet (UV) light with a motion detector to automatically disable the light when individuals or pets are present, providing chemical-free disinfection by causing photolysis and destruction of nucleic acid in microorganisms, mounted beneath cabinets or on desktops for effective surface decontamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical washes or antibacterial agents are used to decontaminate countertops, then pathogen removal is improved, but risk of chemical contamination and re-contamination increases
Solution Approach 1:
The patent replaces chemical decontamination methods with a physical UV-C light system. The UV-C emitter delivers germicidal radiation that destroys pathogen DNA without introducing chemical contaminants, directly resolving the contradiction between effective pathogen removal and chemical contamination risk
Solution Approach 2:
The system changes the decontamination parameter from chemical concentration to UV irradiation dose (measured in microwatt-seconds per square centimeter). By controlling light intensity and exposure time, the system achieves reliable pathogen destruction without chemical hazards
2Reliability
If constant cleaning of countertops is performed to prevent pathogen buildup, then decontamination effectiveness is improved, but practicality and productivity during food preparation deteriorate
Solution Approach 1:
The system performs decontamination in advance during off-hours when the kitchen is not in use. The timer enables automated operation during nighttime or early morning, allowing thorough UV treatment of all surfaces before food preparation begins, eliminating the need for constant cleaning interruptions
Solution Approach 2:
The UV-C emitter provides continuous decontamination coverage of the entire countertop area during operation. The broad emission pattern ensures all surfaces within the treatment zone receive adequate irradiation in a single continuous cycle, maintaining constant protection without interrupting food preparation workflows
3Reliability
If UV light is used for decontamination, then chemical-free disinfection is achieved, but safety risk from accidental exposure to humans and pets increases
Solution Approach 1:
The motion detector continuously monitors the kitchen area for presence of humans or pets and provides feedback to the control circuit. When motion is detected, the system automatically interrupts UV-C emission, creating a feedback-controlled safety mechanism that prevents accidental exposure while maintaining decontamination effectiveness
Solution Approach 2:
The system dynamically adjusts its operation state based on real-time conditions. The UV-C emitter transitions between active and inactive states according to motion detector signals, allowing the system to be fully operational during off-hours and automatically suspended during occupancy, balancing disinfection needs with safety concerns
4Adaptability or versatility
If porous surfaces like cutting blocks are used for food preparation, then functionality is improved, but ability to conceal and harbor bacteria increases
Solution Approach 1:
The UV-C light system replaces mechanical scrubbing methods with photonic penetration. UV radiation at 254 nanometers penetrates porous structures and reaches bacteria hidden within crevices of cutting blocks and other textured surfaces, destroying DNA regardless of surface topology and eliminating the bacterial concealment advantage of porous materials
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The UV light effectively disinfects surfaces by inhibiting microbial reproduction and DNA damage, ensuring safer food preparation areas and reducing the risk of foodborne illnesses, while being safe from accidental exposure to humans and pets.
Implementation Method 1
The UV light emitter disinfects surfaces by causing photolysis and destruction of nucleic acid in microorganisms
Data Source
AI summary
The present invention disinfects countertop surfaces using high intensity ultraviolet energy causing photolysis. The light is directed to the working area of an office countertop or the countertop used in food preparation such as in a residential or commercial kitchen. A motion detector provides a mechanism for disabling the light should a pet or individual enter an area during the disinfection process. The device further includes at least one light-emitting diode (LED) or multiple LEDs allowing dual functionality wherein the device can provide conventional countertop lighting or disinfection lighting.