RESEARCH AND DESIGN OF VACUUM MICROWAVE DRYING CONTROLLER

Abstract

Microwave drying of agricultural products in a vacuum environment is a drying technique that has been researched and applied a lot recently. During the drying process, controlling the combination of vacuum pressure parameters, microwave heating time, and product temperature variation will give different quality indicators, drying time, and energy consumption. This article proposes an algorithm to control the microwave drying process in a vacuum environment with a control structure coordinated continuously over time. From the control algorithm, the article also presents the controller structure, software and experimental equipment for the drying process. Experimental results show the built equipment's fast drying ability, energy saving, and effectiveness.