Freezer Dryer mainly by the refrigeration system and the vacuum system composed of two parts, was added, placed in a low temperature vacuum environment, the red water was frozen into ice, ice at very low pressure sublimation of water vapor, by the vacuum pump So that the processed article is dried. Refrigeration systems and vacuum systems can not be processed as long as there is a problem. So the daily maintenance of the freeze dryer is a very important job. Once the unit fails, should be able to quickly rule out to ensure the normal production.
First, the Freezer Dryer how to maintain the maintenance of the refrigeration system
The refrigeration system of the freeze dryer is mainly composed of compressor, expansion valve, water-cooled condenser, evaporator, oil separator, gas-liquid separator, solenoid valve, hand valve, pressure gauge, pressure controller, dry filter and so on The
The main contents of routine maintenance are the following:
1) daily routine check. Check the main contents are:
① all open the valve should be opened.
② whether the compressor pressure in the normal range.
③ the cooling water pressure and temperature is normal.
④ compressor oil and oil level is normal.
⑤ whether the normal operation of the compressor sound.
⑥ Whether the cooling line produces abnormal vibration.
⑦ compressor and expansion valve frost and so on.
Check found abnormal circumstances, should find out the reasons for timely processing, to eliminate the hidden dangers of accidents.
2) Long-term use of the refrigerant should not be used in the refrigerant to prevent refrigerant leakage, in the production process to the refrigeration system often leaks to ensure that leaks in time to deal with, such as refrigerant is insufficient, should be filled , So as not to affect the normal operation of the equipment
Second, the Freezer Dryer how to maintain the maintenance of the vacuum system
Vacuum system is mainly composed of vacuum pump, front box, rear box, box on the valve, mushroom valve, butterfly valve, vacuum tube and other components.
1) Replace the vacuum pump oil regularly to ensure the performance of the vacuum pump
2) Before starting the vacuum pump, check whether the oil level is normal (should be about 1/2 of the oil mirror).
3) Before the cabinet vacuum must ensure that the back box dry, to avoid pumping water vapor pump, the impact of vacuum pump pumping efficiency.
