Large scale fruit and vegetable crisps freeze-drying machine

Large scale fruit and vegetable crisps freeze-drying machineFreeze drying (FD freeze-drying), also known as vacuum freeze-drying. Freeze drying is the process of pre cooling and freezing substances containing a large amount of moisture into solids. Then, under vacuum conditions, the ice is directly sublimated from the solid, while the substance itself remains in the frozen ice shelf, so that the dried product does not lose its original solid skeleton structure, maintains the original form of the material, and has good rehydration properties.

With the rapid development of freeze-drying machines in the food industry, besides Xu Fuji, the snacks for the New Year include fruit and vegetable crisps prepared by freeze-drying, which have gradually gained recognition for their environmentally friendly, green, non fried, and high nutritional characteristics. They have also become a popular choice for snacks during the New Year.

The freeze-drying process for making New Year snack fruit and vegetable crisps involves washing and cutting the raw materials, blanching and enzyme killing them, quickly cooling them in a pre cooled color protection solution, homogenizing them, and laying a 5-10mm thick layer of material on a metal tray. The material is then inserted into an integrated metal grid mold and pre frozen at -30 ℃. The following vacuum freeze-drying process is adopted: in the stage where the temperature is below 10 ℃, the temperature is raised at 3-5 ℃ per hour. When the temperature reaches 10 ℃, the temperature is maintained for 1 hour, and then the temperature is further raised at 5-7 ℃ per hour. At 40 ℃, the temperature is maintained for 2 hours, and freeze-drying is completed.