Vegetable freeze dryer, also known as vegetable vacuum freeze dryer. By utilizing the working principle of vegetable freeze-drying machine, vegetables are processed into freeze-dried products through vacuum freeze-drying technology, which have the ability to preserve the original color, body shape, and nutritional components of vegetables. They have good rehydration properties and can be stored for a long time at room temperature. Here we introduce the working principle and structural composition of the FZG vegetable freeze dryer.

The working principle of vegetable freeze-drying machine is to use the sublimation principle, based on the characteristic principle of the three-phase state of water "liquid, solid, and gas" converting and coexisting with each other at different temperatures and vacuum states. By using the refrigeration system of a vegetable freeze dryer, water containing vegetables are frozen into a solid state at low temperatures. Then, the vacuum pump system of the freeze dryer creates a vacuum environment in the drying chamber, and a high vacuum drying process is carried out to directly sublime the solid ice into gas, removing 90% of the flowing water. After that, the remaining 10% of the bound water needs to be removed in the analytical drying process. Because the molecular strength of bound water is relatively strong, vegetable freeze dryers provide more heat to sublime and remove bound water, resulting in vegetable freeze dried foods with a water content of 2-5%. The working principle of a vegetable freeze dryer is to use the principle of sublimation to remove moisture through three working stages, resulting in freeze-dried vegetables with very little water content.

The vegetable freeze-drying machine consists of a freeze-drying box and a unit frame, mainly composed of accessories such as a compressor, vacuum pump, circulation pump, and PLC electric control module, which form the refrigeration system, vacuum system, circulation system, electric control system, etc. The operation of each system is controlled by PLC electric control.At present, FZG vegetable freeze dryers have been widely used in lettuceTomatoes, broccoli, chili peppersscallionCilantro, scallionsCauliflowerOnionBeansSpinachedible fungiYam, carrots, etcVegetable freeze-drying processing provides opportunities for the development of deep processing of vegetables!