The automatic control system of freeze-drying machine, many freeze-drying machine with automatic control system, and also has manual control function. The so-called automatic control of the freeze-drying machine should include two parts: one is that the parts of the freeze-drying machine automatically run on and off at the specified time according to the requirements of the freeze-drying process;

Second, the temperature of the drying chamber is automatically tracked according to the requirements of the freeze-drying curve. The whole freeze-drying process does not need manual operation, and the operator is only responsible for monitoring. Laboratory series of freeze-drying machine, freeze dryer classification, experimental series of freeze-drying machine used for research and development, the amount of ice in each batch of cold trap is generally less than 6 kg, the drying chamber plate area is less than 0.2 square meters. The pilot scale and small-scale production series are used to simulate the freeze-drying process in pilot scale and small-scale production. The freezing capacity of each batch of cold trap is generally between 6 and 25 kg, and the plate area of drying chamber is between 0.2 and 2.0 square meters.

The industrial production series of freeze-drying machines are used for large-scale production in factories. The freezing capacity of each batch of cold trap is more than 40 kg, or even more than 1000 kg, while the plate area of drying chamber is more than 2 square meters, or even about 100 square meters. The selection of capacity of freeze-drying machine: generally, the plate area of freeze-drying machine can be referred to, that is, plate loading method and bottle method. The plate filling method makes full use of the plate area, while the bottle filling method needs a larger plate area because the gap between the bottles is not fully utilized. The calculation is based on the two processes of plate and bottle.