Experiment and research on drying characteristics of lychee

摘要

The changes of inner temperature and during characteristics for rind, flesh and stone of lychee were investigated under constant relative humidity of drying medium at different temperatures, and at atmosphere and decompression. Results show thatthe membrane resists moisture moving from the flesh or stone to rind. Decompression drying is helpful to the diffusion of the moisture inside the rind, but it is not so efficient to move the moisture out from the flesh or the stone. Tin the dryingprocess, the inner temperature rising of lychee is slow. A proposal on appropriate drying technique for lychee is given based on the experiments.