In fields such as scientific research, pharmaceuticals, and the food industry, preserving the activity and stability of substances is crucial. In order to achieve this goal, scientists have developed an efficient equipment - a vacuum freeze-drying machine. The vacuum freeze dryer combines freezing and vacuum technologies to remove water from the sample in the form of ice, retaining the activity of the substance while maintaining its original shape and structure, providing important support for laboratory work and industrial production.

The vacuum freeze dryer mainly includes three main steps: freezing, vacuum, and heating. Firstly, the sample is frozen at low temperature to convert water into ice. Next, a vacuum environment is established inside the equipment to reduce pressure and directly convert ice into water vapor through sublimation, bypassing the process of liquid state. Finally, drying is achieved by heating the sample and evaporating the remaining water. Throughout the entire process, the vacuum freeze dryer ensures the stability and controllability of the sample drying process by controlling parameters such as temperature, pressure, and time.

Vacuum freeze-drying machines play an important role in multiple fields. In the field of biomedicine, it is widely used for freeze-drying of biological samples, such as cells, enzymes, vaccines, and drugs. Due to its ability to remove moisture at low temperatures and maintain sample activity and stability, vacuum freeze-drying machines are highly suitable for preserving biological samples for further research and application.

In the food industry, vacuum freeze-drying machines are used for drying and preserving food. By combining freezing and vacuum technology, vacuum freeze-drying machines can quickly remove moisture from food, thereby reducing its volume and weight, and extending its shelf life. In addition, vacuum freeze-drying can also maintain the original taste, texture, and nutritional composition of food, making it have a better taste and quality.

As an efficient drying equipment, vacuum freeze-drying machines can retain the activity and stability of substances by combining freezing and vacuum technologies. It plays an important role in the preservation of biological samples in the field of biomedicine and in the drying and preservation of food in the food industry. The vacuum freeze dryer ensures the stability and controllability of the sample drying process by controlling parameters such as temperature, pressure, and time. With the continuous development of technology, vacuum freeze-drying machines will continue to provide efficient and reliable drying solutions for laboratories and industrial fields.