With the continuous development of freeze-drying technology and freeze-dryer technology, freeze-drying has been increasingly used in the development of sterile preparations of traditional Chinese medicine. In the entire process of freeze-drying sterile preparations of traditional Chinese medicine, the freeze-drying process is an important process, and the freeze-dryer is an important key equipment. The freeze-drying process is a technological process, and how to make good freeze-dried products is fully reflected in freeze-drying technology and freeze-dryer technology.

Freeze-drying equipment, with excellent performance, allows the water in food to be directly sublimated from solid to gas under the conditions of slurry and vacuum, without going through liquid evaporation. Vacuum freeze-dryers can maximize the preservation of the original color, aroma, taste, and shape of food, and the original nutrients and active substances are rarely damaged, and rehydration is fast, without the need for additives. The products after drying have emerged in the international market. Environmentally friendly food vacuum freeze-dryers, mainly including the freezing chamber for material freezing and the drying chamber for sublimation drying, as well as auxiliary systems such as freezing, vacuum, and heating.

Freeze-dryers can improve product quality and grade, and are widely used in the pharmaceutical industry, life sciences, health foods, gourmet foods, and other industries. To purchase high-quality and suitable vacuum freeze-dryers, the following aspects should be considered when selecting:

1. The production of freeze-dried products is related to economic benefits. For vacuum freeze-dryers with the same freeze-drying area, freeze-drying the same materials, the time spent may be different. Freeze-drying takes a long time, the freeze-drying output is low, and vice versa. Therefore, equipment that takes less time should be selected.

2. Installed capacity. The installed capacity provided by different vacuum freeze-dryer manufacturers may not be the same standard. Some manufacturers' installed capacity only includes vacuum equipment and heating equipment, and the freezing equipment is installed separately; some manufacturers' installed capacity does not include vacuum equipment and heating equipment, because they use jet vacuum pumps and steam heating, and the heater is separately installed with power. Therefore, when selecting, it is necessary to understand the actual installed capacity of the equipment.

3. Energy consumption. The energy consumption required by different freeze-dryers during operation is also different. When selecting, it is necessary to clearly analyze the energy consumption required by the equipment to remove 1 kg of water.

4. Before selecting a vacuum freeze-dryer, compare prices from multiple vendors and use the same material to conduct freeze-drying experiments. The quality of the freeze-dried product should be checked for uniformity and qualification rate. Generally, the drying level of the materials accumulated in the center and near the vacuum dryer equipment will be different, but the difference should not be too large, and the qualification rate of the finished product must be above 98%.