Common problems and solutions of vacuum freeze dryer "tested and effective"

　　Here are some common problems and solutions for vacuum freeze dryers prepared by the editor of Ganzhou Dachang for everyone. You can read below:

　　1、 Malfunction of refrigeration system

　　The refrigeration system, as the heart of the freeze-drying machine, malfunctions can have an impact on the quality of the product. Common issues include:

　　1. High pressure alarm: Insufficient water volume or high water temperature in the water-cooled condenser; Scale deposition reduces heat exchange efficiency; Low pressure pipeline rupture causes air to enter the refrigeration pipeline; The valve is not fully open or the exhaust is blocked.

　　2. Excessive compressor current: insufficient or inferior lubricating oil, cylinder wear or damage.

　　3. Oil pressure difference alarm: filter blockage, high viscosity of lubricating oil or strong suction force, etc.

　　2、 Problems with the automatic control system

　　Malfunctions in the automatic control system may affect the production process, such as:

　　1. Temperature control failure: sensor malfunction, controller setting error, heating element malfunction, etc.

　　2. Vacuum pump malfunction: mechanical parts wear, pipeline leakage, etc.

　　3、 Malfunction of the vacuum system

　　Vacuum system failure may lead to poor drying effect or decreased production efficiency, such as:

　　1. Unstable vacuum degree: pipeline leakage, decreased pump performance, high atmospheric humidity, etc.

　　2. Vacuum chamber leakage: damaged sealing ring, rough sealing surface, etc.

　　4、 Poor drying effect of materials

　　If the drying effect of the material is poor, it may be due to the following reasons:

　　1. Inappropriate drying parameter settings: drying temperature, vacuum degree, cold trap temperature and other parameters are not set properly and need to be adjusted to a range suitable for the material characteristics.

　　2. Inadequate material pretreatment, such as high moisture content and unreasonable particle size distribution.

　　3. Uneven heat distribution in the drying room may be due to rough surface of the heat transfer plate or improper placement of materials.

　　5、 Excessive noise during machine operation

　　Excessive operating noise may be caused by the following reasons:

　　1. The bearing is severely worn and needs to be replaced.

　　2. The lubricating oil has deteriorated and needs to be replaced with new lubricating oil.

　　3. The equipment installation is unstable and needs to be checked and fixed properly.

　　We have briefly introduced the common problems and solutions of vacuum freeze dryers, which are "tested and effective". In summary, when encountering problems during the use of vacuum freeze dryers, it is necessary to start from different systems and take targeted measures to solve the problems. I hope the above content can be helpful to you!

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