Study on Ionic Wind of Bipolar Corona and Its Sterilization Effect

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI:10.1109/ICHVE49031.2020.9279649

Sihan Liu, R. Han, Chenyang Zhang, Manyu Wang, Tongkai Zhang, J. Ouyang

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引用次数: 1

Abstract

Plasma has shown excellent potential prospects in sterilization applications nowadays. In this paper, we firstly design a novel sterilizer based on bipolar corona discharge of needle-dielectric-needle configuration. With the help of the dielectric plate, the new sterilizer can effectively avoid spark or arc discharge and eventually converge into a neutral ionic wind. The electrical and optical characteristics of bipolar corona discharge were studied in detail, and the ionic wind velocity with different electrode spacings was measured. The results revealed that the average current had a quadratic relationship with the overvoltage following Townsend relation, and the ionic wind velocity was positively correlated with the overvoltage. Furthermore, we simply estimated the sterilization effect of bipolar corona discharge. It was found that the sterilization efficiency increases with the increase of exposure time, and decreases with the rise of distance from the grounded electrode to the petri dish. In particular, the bipolar corona has a satisfactory sterilization efficiency which can reach 100% at 6 minutes.

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双极电晕离子风及其灭菌效果的研究

等离子体在杀菌方面具有良好的应用前景。本文首先设计了一种新型的针-介电-针双极电晕放电消毒器。在介质板的帮助下，新型消毒器可以有效地避免火花或电弧放电，最终汇聚成中性离子风。详细研究了双极电晕放电的电学和光学特性，并测量了不同电极间距下的离子风速。结果表明，平均电流与过电压遵循Townsend关系成二次关系，离子风速与过电压呈正相关。此外，我们简单地估计了双极电晕放电的灭菌效果。结果表明，灭菌效率随暴露时间的增加而增加，随接地电极与培养皿距离的增加而降低。特别是双极电晕具有令人满意的灭菌效率，在6分钟内可达到100%。

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2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)

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