It is of great significance for optimal controlling the freeze-drying process to determine the end of sublimation drying and desorption. The drying dynamical characteristics test for Fuji apple were carried out using the JDG-0.2 type vacuum freeze-drying machine. Based on the homemade real-time online measurement system, the moisture content of apple blocks was measured, and the changing curve was drawn during the freeze-drying process. According to the measured data, the freeze-drying dynamical characteristics were analyzed, the judgment method for the end of sublimation drying and desorption was proposed. It provides the means for optimal controlling parameters during the freeze-drying process.
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崔清亮,郭玉明,郑德聪.基于干燥动力学特性的冷冻干燥过程判[J].农业机械学报,2010,41(4):124-127. of Freeze-drying Process Based on Drying Dynamical Characteristics[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(4):124-127.