一种新型微波固化炉电场均匀性仿真分析

Simulation Analysis of the Electric Field Uniformity in a Novel Microwave Curing Oven

针对家用微波炉腔体内部电场分布均匀性差,难以保证微波固化试验结果准确度和可信度的问题,设计了一种正十边形微波固化炉,利用有限元法模拟了水在炉内的微波加热过程,分析了玻璃盘转速和高度对微波固化炉腔体内电场分布均匀性的影响。结果表明,增大转速能较好地提升温度均匀性,而不同高度的电场均匀性波动较大。通过比较不同状态下水的温度变异系数(COV)和加热效率,获得了合适的转速与高度,较好地实现了腔体内电场的均匀分布。

In view of the poor uniformity of electric field distribution inside the domestic microwave oven,it is difficult to ensure the accuracy and reliability of the microwave curing test results,a regular decagon microwave curing oven was designed.The microwave heating process of water in the oven was simulated by the finite element method.The influence of the rotating speed and height of glass plate on the uniformity of the electric field distribution in the microwave oven were analyzed.The results show that increasing the rotational speed can improve the temperature uniformity better,and the uniformity of the electric field at different heights fluctuates greatly.By comparing the temperature coefficient of variation(COV)and heating efficiency of water under different conditions,the appropriate rotation speed and height were obtained,and the uniform distribution of the electric field in the cavity was achieved.