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what is the process for freeze drying food

The basic principle of food freeze drying equipment

Food freeze drying equipment is based on the three-state change of water. Water has solid, liquid and gaseous states, and the three states can be transformed into each other and coexist. When water is at the triple point (the temperature is 0.01°C, and the water vapor pressure is 610.5Pa), the food freeze drying equipment enables water, ice, and water vapor to coexist and balance each other. Under the high vacuum state, using the principle of sublimation, the moisture in the pre-frozen material can be directly sublimated into water vapor in the ice state without melting the ice, so as to achieve the purpose of freeze drying.
Advantages of freeze dried food equipment

Freeze dried food equipment freeze-dried food, fruit, vegetables, medicine, etc. The products are sponge-like, without shrinkage, with excellent rehydration and very little water content. After corresponding packaging, they can be stored and transported at room temperature for a long time. Because the freeze dried food equipment has the incomparable advantages of the vacuum freeze-drying method, the technology has been more and more favored by people since its inception, and has been widely used in medicine, biological products and food industry.
Features of equipment for freeze drying

1. Imported fully enclosed refrigeration unit is adopted, with low temperature and strong water capture capacity.

2. It adopts air cooling method to dissipate heat, does not need water cooling, can be used in any region, and has strong cooling activity.

3. The vacuum connection adopts international standard parts, which is easy to disassemble and install, and has reliable sealing performance.

4. The temperature of the cold trap and the vacuum degree of the sample are displayed by LCD digital, which is concise and clear.

5. The specially designed touch soft keys can quickly and accurately realize various function settings, and the operation is simple and convenient.

6. Specially designed stainless steel sample holder, the distance between ordinary sample trays can be adjusted, and the number of layers can be set freely.

7. The equipment for freeze drying adopts stainless steel cold traps and countertops, which are simple, sanitary, beautiful and corrosion-resistant.

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