Select the type of refrigerant. The use of Freon refrigerants is prohibited or restricted because of its destructive effect on the ozone layer. Now most brands choose to use fluorine-free and ozone free refrigerants in freeze-drying machines. The main manufacturing process and parts of freeze-drying machine.

The quality, reliability and service life of the freeze dryer are directly related to the design and manufacturing process and the selection of parts. In order to ensure the uniformity of cooling and heating temperature, most freeze-drying machine manufacturers use hollow interlayer, which is equipped with a partition, and the intermediate fluid circulates through the temperature transfer partition. The old or backward production method is to make holes on two or one of the plates above and below the plate layer, weld the metal plate with the diaphragm by plug welding, and then carry out machining. Because the freeze-drying process works in low temperature, vacuum, even high temperature, pressure and other special conditions, after using this welding method for a period of time, the temperature transfer fluid may leak at the plug welding place. In the vacuum state, the temperature transfer fluid instantly atomizes, resulting in the pollution and scrapping of freeze-dried products.

And the use of new or advanced manufacturing methods, two metal plates are not perforated, using special internal welding equipment manufacturing, fundamentally eliminating the leakage phenomenon. Automatic control system of freeze dryer. Many lyophilizers are equipped with automatic control system, and combined with manual control. The so-called automatic control of the freeze-drying machine should include two parts: one is the automatic operation and switching of the components in the freeze-drying process within the specified time according to the requirements of the freeze-drying process; Second, the temperature of the freeze-drying chamber is automatically tracked according to the freeze-drying curve. The whole freeze-drying process does not need to be monitored manually, only by the operator.