Function and troubleshooting of vacuum freeze dryer

First, the main features of vacuum freeze dryer

1. The vacuum freeze dryer adopts air-cooled condensing fully enclosed compressor refrigeration system, which has rapid refrigeration, low temperature of the ice maker, and strong ability to absorb moisture

2. The freeze-dried items of the vacuum freeze dryer are naturally heated by air to maintain the safety of the samples

3. Temperature and vacuum display are digital, accurate and intuitive

4. The vacuum freeze dryer uses a transparent plexiglass cover, which can observe the entire freeze-drying process, and the samples are clear and intuitive

5. Stable performance, easy operation and low noise

6. Vacuum connection adopts international standard clamps, which is convenient and reliable

7. vacuum freeze dryer is equipped with a vacuum pump power plug, no need to connect another power supply, easy to use

Second, the common problems of vacuum freeze dryer and troubleshooting methods

1.The vacuum degree cannot reach the target

       Check that the air bleed valve of the vacuum freeze dryer is closed tightly. The valve can also be repeatedly opened and closed during the pumping process to allow outside air to blow through the valve hole to blow off possible impurities in the vacuum freeze dryer valve, thereby ensuring the valve's seal.The vacuum pump is connected to the host by a vacuum tube. Check whether the clamps at the two connections are tightened. The stainless steel connector on the right air inlet of the vacuum freeze dryer can be tightened clockwise with a large wrench.Check that the bottom of the plexiglass cover is smooth and flat. Whether the "O" rubber seal is damaged. When the vacuum freeze dryer starts to work, the face glass cover is pressed down for a while, which is good for sealing.Check the quality of the vacuum freeze-drying machine oil, and observe whether the pump oil becomes turbid or contaminated with impurities through the sight glass. Generally, it should work for about 200 hours continuously, and the vacuum freeze-drying machine oil needs to be replaced

2. Oil leak from vacuum freeze dryer Check the oil leak from vacuum freeze dryer and replace the corresponding new parts

3. The temperature of the cold trap is too high, which is generally caused by the poor heat dissipation of the vacuum freeze dryer or the high ambient temperature.

4. Vacuum display "---" Check the vacuum gauge connection of the vacuum freeze dryer