Characteristics of vacuum freeze dryer:

Freeze drying refers to the process of removing water or other solvents from frozen biological products through sublimation. Sublimation refers to the process in which a solvent, such as water, like dry ice, changes directly from a solid state to a gas state without going through a liquid state. The product obtained from freeze-drying is called freeze-dried material, and this process is called freeze-drying.  

Traditional drying can cause material shrinkage and damage cells. The structure of the sample will not be damaged during the freeze-drying process, as the solid components are supported by the solid ice in their positions. When ice sublimates, it leaves pores in the remaining dry material. This preserves the integrity of the biological and chemical structure and activity of the product

1. The moisture content of the dried material is very low (less than 5%) and can be stored for a long time.

2. The loss of nutrients is small, and the substance after freeze-drying is porous, with a loose texture and a similar appearance to before drying.

3. It can achieve the goal of maintaining the original color, aroma, taste, shape, and freshness of the material. The ingredients are preserved, and the taste becomes stronger due to dehydration.

4. After freeze-drying, the material mostly has a porous sponge like structure, which can quickly recover after adding water and has excellent rehydration properties.

Principle of Vacuum Freeze Drying Machine

Freeze dryer is a low-temperature drying equipment that uses sublimation principle to dehydrate materials, also known as vacuum freeze dryer! The principle of a freeze dryer is to freeze water containing materials into solids, and utilize the sublimation performance of water under low temperature and low pressure conditions to dehydrate the materials at low temperatures, achieving a new drying method. The product obtained by vacuum freeze-drying is called freeze-dried product.

Simply put, the principle of a vacuum freeze dryer is to place the sample in a vacuum environment, and through a process from high temperature to low temperature, the free water in the sample evaporates, while the bound water in the sample cannot be evaporated. The purpose is to increase the storage time of the samples for a longer period of time.

Characteristics of vacuum freeze dryer

1. Pre freeze drying is carried out on-site, reducing the complexity of the drying process and achieving automation;

2. Touchscreen LCD display, PID intelligent adjustment, displaying the drying process in the form of curves and data, providing users with more drying process information;

3. Square shelves are not easily deformed, easy to operate, and easy to clean. The drying room adopts high transmittance colorless transparent organic glass doors, which can clearly observe the changes in materials during the operation process;

4. The cold trap and working surface are made of stainless steel, which is corrosion-resistant and easy to clean;

5. Self compound refrigeration technology, imported brand compressors, ensure low equipment noise, large refrigeration capacity, strong water capture ability, and reduce freeze-drying time;

6. The shelves use silicone oil as the medium, with uniform material temperature and temperature deviation ≤ 1 ℃, ensuring that the material structure remains unchanged;

7. The shelf temperature is adjustable and controllable, which can meet the production process of different materials;

8. Equipped with an inflation valve that can be filled with dry inert gas;

9. Optional: eutectic point testing device, capping device, temperature recorder, electric defrosting function.