Wax plum blossom was originally called Huangmei，Containing volatile oil、Containing camptothecin, isocamptothecin, camptothecin, and alpha caroteneHaving ornamental, medicinal, and edible valueRecently, vacuum freeze-drying technology has been used to process wax plum blossoms, which can preserve the original fragrance, color, and shape of the flowers while preserving the medicinal and nutritional components.Wintersweet Flowerfreeze-drying technologyStrict selection of flower freeze-drying machines is necessary to ensureWintersweet FlowerFreeze drying processing was successful.

Freeze drying technology of wintersweet flowersMainly controlling the freezing crystallization temperature, drying process temperature, and vacuum degree, based on the eutectic point of wax plum blossomsEutecticdrop，Determine the pre freezing temperature-43Control of the drying process of wintersweet flowers at ℃Minimum melting temperature，Make sure not toBeyond the temperature of the freeze-drying stage,Otherwise, wax plum blossomsThe frozen layer will melt，causeWintersweet FloweroccurCollapseExpansion and contractionWaiting for phenomena.at the same timeWe need to considerThe freeze-drying process of materialsCollapse, melting, solid matrixdisintegrationoccur，So the freeze-drying sublimation temperature is maintained at-40~+20℃ is used, and the vacuum value is controlled at20PAWithin, the heating rate is controlled in multiple stages.Through the strict freeze-drying process control mentioned above, the original aroma, color, and shape of dried wintersweet flowers are basically maintained, and most of the nutrients and trace substances are preserved. They have good rehydration properties and can be stored for a long time at room temperature.

The freeze-drying of wintersweet flowers requires the use of a fresh flower freeze-drying machineThe selection of fresh flower freeze-drying machine must ensure that it meets the freeze-drying process technology of wax plum blossom. The technical requirements for selecting a fresh flower freeze-drying machine based on freeze-drying technology are as follows:
1Temperature control range of partition:-50~+70℃；

2Condensation limit temperature:-70~-75℃；

3Extreme vacuum:3pa;

4The fresh flower freeze-drying machine needs to have functions such as process setting, temperature control, heating rate control, and vacuum fine adjustment.

The fresh flower freeze-drying machine can process various types of rose freeze-drying, osmanthus freeze-drying, lotus freeze-drying, etc. Among them, Yongsheng Flower is a good application of fresh flower freeze-drying.