Medical Lyophilizer

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Safety Issues That Must Be Paid Attention to During the Temperature Adjustment of Medical Lyophilizer

For the temperature adjustment equipment commonly used in various operation projects, it is very important to pay attention to safety issues first, because this affects whether the equipment can have a safe operation result. Be careful during daily operation. Let's take a look at the safety issues that must be paid attention to during the temperature adjustment of freeze-drying equipment.
During the temperature adjustment period of the freeze dryer, the first thing to pay attention to is the implementation of the application method, followed by the attention to the details in the temperature adjustment process.

1. In order to add a refrigeration branch circuit that can provide appropriate cooling capacity next to the refrigeration system pipeline that supplies cooling to the front chamer of the freeze dryer under the premise that the cooling capacity of the refrigeration compressor is sufficient to meet the cooling capacity requirements during temperature adjustment.
2. When adjusting the temperature, the refrigeration compressor is supplying cooling to two evaporators with different evaporation temperatures. The difference in working conditions may cause a large impact on the refrigeration compressor due to the lag of the expansion valve control. In severe cases, it may cause refrigeration.
3. The hydraulic shock of the compressor caused the failure, which requires a good control of the return steam pressure. The current technicians have added an electromagnetic valve to the return steam pipeline of the front box evaporator, and the pressure difference between the front and rear of the electromagnetic valve is controlled by the pressure controller. Monitoring to control the opening or closing of the valve to reduce the load impact during temperature adjustment and ensure the smooth operation of the compressor.
4. In order to prevent the pressure in the front chamber evaporator from rising due to the closing of the electromagnetic valve, and the temperature adjustment effect cannot be guaranteed, the technicians added a steam return branch to the steam return line in front of the electromagnetic valve, which is connected to the suction pipe of the two-stage compression of the refrigeration compressor, through practice on multiple freeze dryers, proved that this treatment plan is feasible, it can not only avoid the increase in the cost of adding a temperature adjustment unit, but also solve the current problem. The commonly used capillary temperature adjustment results in unsatisfactory temperature adjustment effect and load impact on the compressor.
For these details of the freeze dryer when adjusting the temperature, it is necessary to attract the attention of every operation operator.