It is very necessary to maintain and maintain the four-ring freeze-drying experimental freeze-drying machine

 The working principle of the four-ring freeze-drying experimental freeze-drying machine: after starting the machine, put the material into the material box for freezin.
The freezing process of the materia.
On the one hand, the vacuum system is evacuated to take away part of the water; When freezing, the water contained in some molecules is discharged to the surface of the material for freezin.
After the freezing requirements are met, the material is heated and dried by the heating system, and the water contained in the material is brought to the freezing and trapping box by vacuuming for freezin.
, to meet the requirements of freeze-drying of material.
Freeze-drying refers to the process of removing moisture or other solvents from frozen biological products by sublimatio.
Sublimation refers to the process of a solvent, such as water, like dry ice, changing directly from a solid state to a gaseous state without going through a liquid stat.
The product obtained by freeze-drying is called lyophilisate, and the process is called freeze-dryin.
Traditional drying can cause the material to shrink, destroying cell.
The structure of the sample is not destroyed during freeze-drying because the solid components are supported by the solid ice in their plac.
As ice sublimates, it leaves pores in the dry leftover materia.
This preserves the integrity of the product's biological and chemical structure and its activit.
The four-ring freeze-drying experimental freeze-drying machine uses the physical principle to flow the humid and high-temperature compressed air into the pre-cooler (special for high-temperature type) for heat dissipation, and then flows into the heat exchanger for heat exchange with the cold air discharged from the evaporato.
The temperature of the compressed air entering the evaporator decrease.
In theory, its dew point temperature can be close to 0 degree.
In practice, the dew point temperature of a good freeze dryer is generally around 5 degree.
In order to ensure the normal operation of the machine and the quality of the air, it is very necessary to maintain and maintain the machin.
The maintenance of the machine can be divided into daily maintenance and periodic maintenanc.

(1) Daily maintenance itemsBefore starting the machine, check whether the condenser on the back of the machine is clean to avoid poor heat dissipatio.
Check whether the safety device is reliable before starting the machin.
After the machine runs for 10-20 minutes, check whether the working pressure and working current are norma.
After the compressed air is introduced, run for 10 to 20 minutes to check whether the automatic drainer has drainag.
Please open the drain valve more than twice a week for the machin.
The manual drain valve of the machine must be drained more than twice a da.
When the ambient temperature is high, please check whether it exceeds 40°C, and if it exceeds, please improve i.
(2) Periodic maintenance items need to use dry compressed air or copper brush to clean the condenser on the back of the machine more than once a wee.
(3) Check whether the automatic drain valve is dirty and blocked every mont.
If it is dirty or blocked, it needs to be cleaned in tim.
(4) Check whether the cooling fan blades have bad vibration every three month.