Research and Application of an Intelligent Elevator Button Disinfection Device Based on UVC-LED

ZHAO Shuai; CUI Hongliang; YANG Tao; FENG Huimin; GUO Mingjie; YAN Jianchang; LI Jinmin

doi:10.3969∕j.issn.1004-440X.2026.01.012

Abstract：To address the problem that building elevator buttons are easily contaminated with pathogens and cause cross-infection,this study adopts AlGaN-based deep ultraviolet LED technology for rapid sterilization and disinfection.According to the shape of the elevator panel,a unique disinfection device structure was designed,and an intelligent infrared sensing timed sterilization circuit was constructed based on practical application scenarios.The system can perform sterilization immediately after a person touches the button and automatically stop sterilization after a certain period of time.Through optical simulation,the scheme was optimized,and the optimal parameters of the core deep ultraviolet LED devices(including the number of light sources,emission angle,spacing between LED beads,inclination angle of the light source board,and optical power,etc.)were determined,thereby improving the irradiation intensity of the disinfection device and reducing disinfection time.Finally,prototype development verified that the device functions meet the requirements of intelligent control design,the measured irradiation intensity values are close to the simulation data,and simulated on-site surface disinfection tests as well as on-site surface disinfection experiments were conducted.The results show that with a preset sterilization time of 15 s,the device can achieve a 99.9%sterilization rate against Escherichia coli and Staphylococcus aureus,and up to a 90%sterilization rate against natural bacteria.This scheme can be promoted as a reference case for application in different object surface disinfection scenarios.