Rotating UV Reflector Towers for Shadow-Free Surface Disinfection
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Solution Overview
Problem
Current UV-C disinfection systems face challenges in effectively reaching shadowed areas and maintaining energy delivery due to the inverse square law, leading to incomplete disinfection and energy inefficiencies, as well as issues with heat and electricity consumption from strong UV light sources.
Innovation Solution
The system employs multiple UV light towers with rotating reflectors and motorized components to focus and distribute UV energy evenly across surfaces, using sensors and algorithms to adjust rotation speeds and exposure times based on distance, and includes cooling fans and safety features like motion-detecting sensors for automatic shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV-C emitters are used to disinfect hard surfaces, then disinfection effectiveness is improved, but shadowed areas cannot be adequately disinfected because UV energy is delivered along a line-of-sight
Solution Approach 1:
The patent introduces rotational movement to transform the UV emitter from a static point source into a dynamic distributed source. By rotating the emitter around the room, UV energy is delivered from multiple angular positions, effectively eliminating shadowed areas that would exist with a fixed emitter. This dimensional transformation from static to dynamic operation ensures comprehensive surface coverage.
Solution Approach 2:
The system employs dynamic rotation of UV emitters rather than static positioning. The emitter rotates to change its spatial relationship with surfaces over time, ensuring that all areas receive adequate UV exposure. This dynamic operation allows the same emitter to serve multiple positions and angles, eliminating the shadow problems inherent in fixed installations.
2Reliability
If UV-C emitting sources are used to disinfect surfaces, then disinfection capability is improved, but the Inverse Square Law causes energy intensity to decrease exponentially with distance
Solution Approach 1:
The system dynamically adjusts the emitter's position through rotation, continuously changing the distance and angle relationships between the emitter and different surfaces. This allows optimization of energy delivery to various areas, ensuring that even distant surfaces receive adequate UV exposure while minimizing total energy consumption by targeting exposure efficiently.
Solution Approach 2:
The rotational operation creates periodic exposure patterns where different surfaces receive UV energy at different times in the rotation cycle. This periodic action allows the system to deliver energy efficiently to multiple surfaces sequentially, reducing the total energy required compared to attempting to illuminate all surfaces simultaneously from a fixed position.
3Reliability
If strong UV light sources are used to kill bacteria, then disinfection effectiveness is improved, but substantial electricity consumption and heat generation occur
Solution Approach 1:
By rotating the UV emitter, the system distributes the disinfection task over time and space, allowing use of moderate-power emitters instead of requiring extremely high-power fixed sources. The dynamic movement ensures adequate exposure through multiple passes, reducing the peak power requirement and overall electricity consumption while maintaining disinfection effectiveness.
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
This approach ensures comprehensive disinfection of hard surfaces by eliminating shadows and optimizing energy distribution, reducing exposure time, and minimizing UV exposure to humans while extending bulb life and improving safety.
Implementation Method 1
Introducing UV-C energy is an evidence-based way to manage the presence of bacteria and spore-including multi-drug resistant organisms. Disinfecting hard surfaces, such as those found in patient areas, can be performed by exposing the hard surfaces to UVC energy that is harmful to micro-organisms such as bacteria, viruses, fungi and spore. Ultraviolet germicidal irradiation (UVGI) is proven sterilization method that uses ultraviolet (UV) energy at sufficiently short wavelengths to break-down and eradicate these organisms. It is believed that the short wavelength radiation destroys organisms at a micro-organic level. It is also believed that UV energy works by destroying the nucleic acids in these organisms, thereby causing a disruption in the organisms' DNA.
Implementation Method 2
a reflector proximally associated with said emitter; wherein said reflector directs energy from said emitter onto an area to be disinfected
Data Source
Figure 1A~1C
Figure 2
Figure 3~4
AI summary
A system and method for disinfecting hard surfaces in an area such as a hospital room including a light source emitting UV light and a reflector mounted behind the light source for concentrating and directing the light toward a target. The light source and reflector rotate to direct the concentrated beam around a room, thereby making more efficient use of the energy being emitted.