The long-term preservation of biological samples is crucial to scientific research, medical and other fields, and freeze dryers play a key role in this regard. Microbial samples such as bacteria and viruses, as well as some biological tissue samples, can be preserved for a long time in a low temperature and low humidity environment through freeze drying, effectively extending their service life.

During the freeze-drying process, the freeze dryer can quickly lower the sample temperature, freeze the water in it quickly, and then sublimate it in a vacuum environment to remove the water, minimizing the damage of water to the activity and structure of biological samples. When the samples are needed, they can be restored to their original properties after re-dissolution and other treatments, providing reliable sample support for biological research, disease diagnosis and other work.