Thiết kế, chế tạo thiết bị sấy thăng hoa để sấy đông trùng hạ thảo và thủy sản

Abstract

    This paper presents the results of research on manufacturing a small capacity freeze drying equipment for drying cordyceps militaris and high value product seafoods. Research results have produced a freeze drying equipment with the yield is about 1 kg/batch, the drying temperature can reach -35 ^oC, and sublimation the sublimation pressure can be as low as 20 Pa. In addition the drying temperature and pressure are monitored and controlled by PID method to ensure stable maintenance of the parameters of the drying mode in accordance with the research and testing process of many different products. Therefore, the equipment serves well the research and training needs related to freeze drying.