vegetable and fruit freeze dryer is dried in a vacuum environment, so the raw materials can be dehydrated at a low temperature, and then enter the freeze drying chamber. In a vacuum state, the temperature rises to several tens of degrees, which promotes the direct sublimation of moisture in frozen foods. The freeze-dried grain prepared by the freeze dryer equipment is a process of dehydrating food in a very low temperature environment under a vacuum state. Water can be directly transformed from a solid state to a gas state, without sublimation to transform the intermediate liquid state.
Compared with drying and puffing drying, freeze-drying technology can retain as many nutrients as possible in food, such as color, aroma, and taste, and effectively extend the shelf life of food. The air dryer adopts a large air volume freeze dryer and a low-noise fan for natural drying, which can effectively remove water droplets on the surface of the material for drying.
The functions of using a vegetable and fruit freeze dryer are as follows:
1. Freeze-drying is carried out at low temperature, so it is especially suitable for many heat-sensitive materials. Such as loss of biological vitality.
2. When drying at low temperature, the loss of some volatile components in the substance is small, and the original nutrients are maintained.
3. During the freeze-drying process, the growth of microorganisms and the action of enzymes cannot proceed, so the original shape can be maintained.
4.Because it is dried in a frozen state, the volume is almost unchanged, and the original structure is maintained without concentration.
5. The dried material is loose, porous, and spongy. After adding water, it dissolves quickly and completely, and almost immediately returns to its original shape.
6. Since drying is carried out under vacuum, there is little oxygen, so some easily oxidized substances are protected.
Seven. Drying can remove more than 95-99% of water, so that the dried product can be stored for a long time without deterioration.
Vegetable and fruit freeze-drying machine has programmable heating and temperature control functions, and can view the freeze-drying curve, which is convenient for users to observe the freeze-drying process of fruits and vegetables. Compared with the pilot freeze-drying machine with the same freeze-drying area, this product has the advantages of small size and low price. Compared with the traditional laboratory small freeze-drying machine, the product is easy to operate, freeze-drying in place, and avoids the pollution and manual operation of the material drying process.