基于球壳阻抗匹配的高导电液体高效微波加热系统OA

Due to its high efficiency and environmental benefits,microwave heating has been extensively ap-plied in industrial production.However,during the processing of highly conductive liquids,the significant disparity in dielectric properties between the air and the sample causes impedance mismatch,resulting in low heating effi-ciency and severe energy reflection.A novel impedance matching method based on suspended ceramic spherical shells is proposed and applied to a multimode cavity heating system to achieve efficient and stable microwave heat-ing of highly conductive liquids.First,the geometric parameters of the ceramic spherical shells are designed and optimized based on transmission line theory and equivalent permittivity theory.A simulation model of the funda-mental unit of matching layer is established to verify its effectiveness.Second,the designed matching layer is inte-grated into a multimode cavity heating system,and a corresponding multiphysics simulation model is constructed by using COMSOL software.The simulation results demonstrate that the proposed method significantly enhances heating efficiency for highly conductive liquids and reduces microwave reflection.Finally,the effects of liquid die-lectric properties,load volume variations,and sphere position fluctuations on heating efficiency are investigated.This study provides a structurally simple and highly adaptable solution for efficient microwave heating of large-vol-ume,highly conductive liquids in industrial applications.