A study of the space sterilization device using atmospheric-pressure DBDs plasma

Abstract

Atmospheric pressure plasma is generated by electrical discharge at atmospheric pressure environment, and in general, the energy of electrons is higher than that of other particles, such as ions and neutral particles. In this state, the plasma becomes a non-equilibrium state. Plasma ozone is being utilized in a variety of applications in the field of sterilization due to its high performance of sterilization. Dielectric materials used in DBDs are mainly glass, quartz and ceramics. These dielectric layers have the advantage of limiting the amount of supplied electron charge and allowing plasma to occur evenly on the surface of the dielectric. Actually, the target or environment for sterilization is often a complex structure, so research and academic study are needed by utilizing the concept of space sterilization. In this study, an AC power supply is applied to generate dielectric barrier discharges (DBDs) plasma at atmospheric pressure for disinfection due to the effectiveness in producing radicals and ozone. The generator of plasma ozone is a basic structure of DBDs by placing ceramic tube dielectrics and SUS, electrical Conductors at constant intervals. Various applications can be developed based on the proposed design method. It can be also applied to applications aimed at space sterilization through scale-up and addition of various functions and can be used as basic data for this purpose. Plasma ozone generation as a space sterilization device is recognized as an excellent sterilization device. Through the this research, design and verification of the device, the optimal design of the space sterilization device is established.