The design of food freeze-drying machine automatic control system requires simple operation, starting from the material into the button, quick freezing vacuum sublimation drying at one go, s esting that the freeze-drying is completed after the shutdown discharge. The relevant temperature and pressure control points should be carefully selected and reasonably controlled, and the associations of quick freezing, vacuum maintenance, and heating should be properly controlled, and the technological curves should be set for different materials.
　　The food freeze dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. So what are the benefits of food freeze dryer? Here we take a look:
　　1. Freeze-drying is performed at a low temperature and is therefore particularly suitable for many heat-sensitive substances. If proteins, microorganisms and the like do not degenerate or lose their vitality. Therefore, food freeze-dryers are widely used in medicine.
　　2. Since the food freeze-dryer is dried in a frozen state, the volume is almost unchanged and the original structure is not condensed.
　　3. After the dried material in the food freeze-dryer is porous, the porous material is spongy and dissolves rapidly and completely dissolves almost instantly.
　　4. Since the food freeze-dryer dries under vacuum with very little oxygen, some easily oxidized substances are protected.
　　5, the food freeze-drying machine in the low-temperature drying of some of the volatile components in the material is very small for some chemical products, drugs and food drying.
　　6, in the freeze-drying process, the growth of microorganisms and the role of the enzyme can not be carried out so it can maintain the original sexual equipment.
　　7. The food freeze drying machine can eliminate more than 95-99% of the moisture so that the dried product can be stored for a long time without deterioration.
　　8. Since the moisture in the material exists in the form of ice crystals after pre-freezing, the dissolved inorganic salts dissolved in water are uniformly distributed in the material;
　　9. After drying, the food freeze-dryer is loose and porous, and it is spongy. After water is added, it dissolves quickly and completely, and it almost immediately restores its original character.
　　10. Oxygen is scarce due to drying under vacuum, so some easily oxidized substances are protected by drying in a food freeze dryer.
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