What are the normal operating conditions of a vacuum freeze dryer?

Vacuum freeze-drying machine is a device that freezes substances at low temperatures and removes moisture through the sublimation process in a vacuum environment.

Vacuum freeze-drying machine is a device that freezes substances at low temperatures and removes moisture through the sublimation process in a vacuum environment. It is used for drying, preserving, and preparing food, drugs, chemicals, etc.
The operating principle of a vacuum freeze-drying machine is to use the effects of low temperature and vacuum to freeze substances into a solid state. Then, under vacuum, the water is transformed from a solid state to a gas state through heating and pressure, thereby achieving the drying treatment of the substances. This method can preserve the form, taste, color and other characteristics of the substance, and effectively extend the shelf life of the substance.
The freeze-drying process is a heat and mass transfer process that involves multiple disciplines such as refrigeration, vacuum, electronics, chemistry, and low-temperature medicine, with high technological content and complex freeze-drying processes. With the continuous development of China's pharmaceutical industry, vacuum freeze-drying machine production enterprises are also constantly strengthening technological innovation, promoting greater breakthroughs in equipment and better use in the pharmaceutical drying industry.
The normal operating conditions of a vacuum freeze dryer include:
1. Temperature: The low-temperature stage should be below the freezing point, usually between -40 ℃ and -50 ℃. During the heating process, the temperature should gradually increase to the drying temperature of the material.
2. Pressure: The vacuum degree should be between 5-10Pa to ensure that water quickly sublimates from the material and is discharged.
3. Refrigeration capacity: The system needs sufficient cooling capacity to quickly cool the material to a low temperature state.
4. Leakage rate: The leakage rate should be maintained within a reasonable range to ensure the stability of the vacuum degree.
5. Stable power supply: Effective power supply is crucial for the normal operation of equipment.
Note: The specific operating conditions are also influenced by factors such as the model, specifications, and properties of the processed materials of the vacuum freeze dryer. Therefore, it is necessary to refer to the equipment manual or contact relevant technical personnel.