Main Feature 1. 7-inch color LCD touch screen display. 2. Liquid crystal display drying curve. 3. Transparent bell-type drying room, safe and intuitive. 4. Anti-return oil vacuum pump and place the pollution of materials. 5. High cost-effective laboratory vacuum freeze dryer. 6. Mixed environment-friendly refrigerant, green environment-friendly refrigeration capacity is large. 7. The drying chamber is integrally formed. No bonding, high strength, no leakage. 8. The cold trap has a pre-freezing function, which saves the cost of a low-temperature refrigerator. 9. The internal heat exchanger effectively reduces the temperature of the cold trap and has a strong water catching capacity.