Freeze Dryer is composed of refrigeration system, vacuum system, heating system, electrical instrument control system. The main components are drying oven, condenser, refrigeration unit, vacuum pump, heating/cooling device, etc. Freeze drying is abbreviated as freeze drying, which is a method of freezing water-containing materials into a solid state, and then sublimating the water from the solid state to a gaseous state, so as to remove the water and preserve the material.
　　For the use of the freeze dryer, the pre-use inspection is an extremely critical step. Don't think that you can operate the freeze dryer without inspection. Here is a reminder!
　　Freeze dryer companies combine actual use experience, explore new technologies, and continue to develop towards large-scale, high-strength, and high-economy trends. Product quality and after-sales service are steadily improving. To avoid some improper operations and malfunctions, it is necessary to do a good inspection:
　　1 Before each start of the freeze dryer, first check whether the pump oil in the vacuum pump is sufficient. Unscrew the drain valve to let the remaining water flow out. Tighten the valve after draining;
　　2 Check whether the contact part between the freeze-drying chamber and the cold trap is intact, clean and readjust if necessary;
　　3 Close all valves. Close the valve connecting the cold trap and the vacuum pump. Turn on the power switch of the cold trap and turn on the power switch of the vacuum pump. After 15 minutes, open the valve that connects the cold trap to the vacuum pump. After 1 minute, the pre-frozen sample (already in the freeze-drying bottle) can be hung on the holder, and the corresponding valve can be opened to start the freeze-drying process;
　　4 After the freeze-drying is complete, close the corresponding valve (white knob upwards), and remove the freeze-drying bottle. After all the freeze-dried bottles are removed, turn off the power supply of the vacuum pump and the cold trap in turn;
　　5 After the frost in the cold trap has melted, open the drain valve to drain, and then close it.