真空冷冻干燥机原理：
Using freezing and vacuuming methods to freeze-dry the materials, so as to achieve the freeze-drying effect. After the material is frozen below the freezing point, the vacuum pump starts to vacuum to continuously reduce the surface vapor pressure of the material and the surface temperature of the material. When the temperature of the material reaches below the eutectic point, the material becomes a solid completely, and the two phenomena of gas coexist without liquid Phase composition. The solvent in the gas phase is trapped by the cold trap when it passes through the ultra-low temperature cold trap. The programmable controller continuously provides the energy required for sublimation by heating the shelf during the sublimation process. When the water content in the material reaches below 1%, the ultimate vacuum is used, the surface temperature of the material drops below -50°C, and the remaining solvent volatilizes under the ultimate vacuum.
真空冷冻干燥机的优点：
1. With fast drying speed, the time is shortened by 3~10 times;
2. Low energy consumption, only 20%-30% of the energy consumption of ordinary dryers;
3, the drying temperature range is wide (-55℃~+70℃ can be dried), and it can be dried quickly in the low temperature range (-20℃~50℃);
4. The drying chamber is vacuum and oxygen-free, and the drying quality is comparable to that of the original ecological fresh materials;
5. It can recover organic solvents, which is beneficial to reduce production costs and environmental protection, and is especially suitable for materials containing organic solvents that cannot be dried by ordinary dryers.
6. Vertical open-door structure can realize in-situ freeze-drying of material.
7. The control system takes PLC as the core, and uses a touch screen as a man-machine interface, real-time recording of multi-channel temperature data during the freeze-drying process, and can be browsed in the form of a curve, the man-machine interface is clear and intuitive.
8. The shelf temperature control curve can be preset to realize the automation of the sublimation process.
9. The host has a USB interface, which can upload the freeze-dried data to the computer in real time and realize the functions of saving, browsing and printing.
10. It can reduce the possibility of material being oxidized and deteriorated, eliminate bacteria in the material, and ensure quality; at the same time, the original shape of the material can be well preserved.
真空冷冻干燥机的应用范围：
1.它可用于干燥水果和蔬菜，肉类和家禽，水产品，调味料，方便食品和着名和特殊产品等。它可以达到保持原始颜色，香味，味觉，形状和新鲜度的目的食物不变，再水合良好，成品便利储存和运输，成本降低，保质期延长。
2.在人参中使用真空冷冻干燥技术，冬虫夏草和其他营养保健品使人们认为营养产品是纯净和自然的。
3.用于中西药物的脱水和保存，如血清，血浆，疫苗，酶，抗生素，激素等;它仍然保持其生物物理学属性。
