According to their different working principles, structures, and application fields, freeze-drying machines can be classified into the following categories:

Freezing vacuum dryer (freeze-drying machine): Using freezing technology to rapidly freeze the sample and directly convert moisture from solid to gas under vacuum conditions, thus achieving the purpose of drying. This is a common type of freeze-drying machine, suitable for drying various samples, such as food, medicine, biological samples, etc.

Rotating vacuum freeze-drying machine: freeze-drying is carried out under rotating vacuum conditions, and the sample is rapidly dried by uniformly heating and vacuum suction inside the rotating bottle. This freeze-drying machine is suitable for small sample sizes and special shaped samples, such as biological samples, chemical products, etc.

Industrial grade freeze-drying machine: Industrial grade freeze-drying machines usually have larger drying capacity and higher production efficiency, which can meet the needs of large-scale production. These freeze-drying machines typically have stronger structural durability and stability, making them suitable for industrial production lines in industries such as medicine, food, and chemical.

Liquid nitrogen freeze-drying machine: Using liquid nitrogen as the cooling medium, the sample is rapidly frozen, and then the water is transformed from solid to gas under vacuum conditions to achieve drying. Liquid nitrogen freeze-drying machines typically have faster freezing rates and lower temperatures, making them suitable for situations with higher requirements for sample freezing rates and temperatures.

Intelligent freeze-drying machine: a freeze-drying machine that integrates intelligent control systems and automation functions, which can achieve accurate control and monitoring of the drying process. Intelligent freeze-drying machines typically have higher levels of automation, more accurate temperature and pressure control functions, and are suitable for laboratories and production scenarios that require high precision in the drying process. They are usually equipped with user-friendly touch screen interfaces and remote monitoring functions, making it convenient for users to operate and manage.

Desktop freeze-drying machine: Desktop freeze-drying machines are compact, easy to operate, and suitable for laboratories, hospitals, and small production places. They usually have a smaller drying capacity and are suitable for the drying needs of small-scale samples, such as biological samples, pharmaceutical preparations, etc.

Dust free freeze-drying machine: Dust free freeze-drying machines are designed specifically for scenarios with high requirements for sample sterility. They are usually equipped with air filtration systems that can maintain the sterility of samples during the drying process, making them suitable for sample drying in the biopharmaceutical field with strict requirements for sterility.

Automatic cleaning freeze-drying machine: The automatic cleaning freeze-drying machine has an automatic cleaning function, which can automatically clean after drying, improving the hygiene standards and sample processing efficiency of the equipment. This type of freeze-drying machine is suitable for laboratories and production scenarios that require high equipment cleanliness.

Due to the differences in laboratory scale and industrial scale, freeze-drying machines can also be divided into two categories based on different usage scenarios and needs: laboratory scale and industrial scale. Laboratory scale freeze-drying machines are usually used for scientific research, drying of laboratory and small batch samples, while industrial scale freeze-drying machines are used for large-scale production and industrial applications.

The above are the classifications of several freeze-drying machines, and the most common one is the freeze-drying vacuum dryer (freeze-drying machine). However, each type of freeze-drying machine has its specific advantages and applicable scenarios. Users should choose according to their own needs and experimental requirements. I hope this article can provide some reference and help for everyone.