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E-mail
15093177890@163.com
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Phone
15093177890
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Address
B06-1 Qidi Zhenghang Intelligent Manufacturing Industrial Park, Intersection of Xinxiang Road and Luoning Road, Shangjie District, Zhengzhou City, Henan Province
Zhengzhou Kewangda Biological Instrument Co., Ltd
What are the process principles and characteristics of fruit freeze-drying machine?
Date: 2025-09-02Read: 18
1、 Process principle
1. Pre freezing stage: Fresh fruits are rapidly frozen below -40 ℃ to form tiny ice crystals of internal moisture.
2. Vacuum sublimation: In a vacuum environment (usually below 10 Pa), ice crystals directly sublime into water vapor, which is captured and discharged through a condenser.
3. Analysis drying: Further remove residual adsorbed water to reduce the final moisture content to below 5%.
2、 Core Features
1. Nutritional retention: Low temperature (-30 ℃ to -50 ℃) treatment to avoid degradation of thermosensitive components (such as vitamin C).
2. Stable form: The volume of the fruit remains almost unchanged, maintaining its original color and structure, and has good rehydration properties (restoring the fresh fruit state in 3 seconds).
3. Long shelf life: It can be stored at room temperature for 2-3 years under vacuum packaging without the need for preservatives.
4. Environmental protection and energy conservation: No chemical additives, reducing food waste.
3、 Application advantages
1. Diversified processing: suitable for fruits such as strawberries, mangoes, apples, etc., retaining fiber and antioxidant components.
2. Portable and lightweight: After dehydration, the weight is reduced by 80%, making it easy to transport and store.
