Abstract:In order to solve the problems of uneven drying during microwave drying and limited penetration during infrared drying for agricultural products, a microwave infrared vibrating-bed dryer (MIVBD) was developed. In the structure design, the uniformity of the microwave distribution in the resonator was analyzed by COMSOL, and the arrangement of the microwave source was optimized. The infrared source was isolated from the microwave resonator through the porous panel, which ensured the high efficiency of infrared heat radiation and the non-interference of microwave and infrared. The vibration system was made from polyphenylene sulfide (PPS) and other materials inside the resonant cavity, steel structure materials outside the resonant cavity, and agricultural products vibrate through vibration motor and rubber spring. Fresh ginger slices were selected as experimental materials. The drying efficiency, uniformity, and color of MIVBD were studied. When the material temperature exceeded 60℃, microwave and infrared stopped working. The results showed that the drying efficiency of MIVBD was improved by 14.29%. Infrared radiation and vibration can significantly improve the uniformity of material surface temperature distribution. The temperature uniformity of MIVBD was the best, and its temperature nonuniformity coefficient was 2.28%. The MIVBD significantly reduced the drying energy consumption and improved the related quality. The research result can provide theoretical basis and technical support for the application of microwave and infrared radiation in fruit and vegetable drying.