Freeze dryer is a kind of equipment that uses low-temperature vacuum technology to dry materials. Its core role is to retain the active ingredients of materials to the maximum extent, extend the shelf life and maintain the original shape and flavor. The following are its specific roles and typical applications:
Core functions and roles
Low-temperature activity retention
Through pre-freezing (-40℃ to -80℃) and vacuum sublimation technology, high temperature is avoided to damage heat-sensitive substances (such as vitamins, enzymes, and active ingredients of Chinese herbal medicines). For example:
The protein retention rate of freeze-dried pet food can reach 98%, which is significantly higher than the 70% of traditional drying process.
The saponin content of freeze-dried ginseng is 32% higher than that of sun-dried products, and the retention rate of tanshinone is increased by 45%.
Morphology and flavor retention
The cell structure of the material is completely retained, and the original texture is restored after rehydration. For example:
The retention rate of vitamin C and flavonoids in freeze-dried fruits exceeds 90%.
Chinese herbal medicines form a porous structure through freeze-drying, and the dissolution rate of ingredients during decoction is increased by 60%.
Sterilization and long-term storage
The vacuum environment inhibits microbial activity, and a shelf life of more than 18 months can be achieved without preservatives, and the weight is reduced by 70%, making it easier to transport.
Standardized production and energy consumption optimization
The new generation of equipment integrates intelligent control, such as AI models that can shorten the ginseng freeze-drying cycle from 72 hours to 45 hours.
Cold trap waste heat recovery technology reduces energy consumption by 40% and reduces processing costs per ton by 1,200 yuan.
