In the process of using the four-ring freeze-drying experimental freeze-drying machine

Advantages of freeze-drying with a four-ring freeze-drying laboratory lyophilizer: Usually, conventional drying shrinks the material and damages its cell.
However, the structure of the item does not change during the freeze-drying process because the solid components are supported by the ic.
When ice sublimates, pores are left in the dry residual material, which preserves the chemical structure of the sample and the integrity of its activit.
In the process of using the four-ring freeze-drying experimental freeze-drying machine, there are several points that must be paid attention to, mainly in the following aspects:The vacuum box studio of the freeze-drying machine has no explosion-proof, anti-corrosion treatment, et.
Natural, explosive and corrosive gas-producing items are drie.
If the dry items are wet, it is best to add a filter between the vacuum box and the vacuum pump to prevent the wet gas from entering the vacuum pump and cause the vacuum pump to malfunctio.
If the dry items are changed to be light in weight and small in size (in the form of small particles) after drying, a barrier net should be added to the vacuum port in the working room to prevent the dry matter from being sucked and damaging the vacuum pump (or solenoid valve.
The vacuum pump of the freeze dryer cannot work for a long tim.
Therefore, when the vacuum degree meets the requirements of the dry items, the vacuum valve should be closed first, and then the power supply of the vacuum pump should be close.
When the vacuum degree is less than the requirements of the dry items, the vacuum valve and the power source of the vacuum pump should be turned on, and continu.
Vacuum, which can prolong the life of the vacuum pum.
After the freeze dryer has been used for many times, it may not be able to vacuumiz.
At this time, except for maintenance, the left box cover of the freeze dryer should not be disassembled to avoid damage to the electrical control syste.
Replace the door seal or adjust the extension interval of the door buckle on the box to solve the proble.
Seriously, when the drying temperature of the empty box is higher than 200 ℃, slow air leakage will occu.
At this time, remove the back cover of the box and use an Allen wrench to loosen the heater base, replace the sealing ring or tighten the heater base to solve the proble.
If the rubber stopper of the air release valve is difficult to rotate, it can be lubricated with an appropriate amount of greas.
The freeze dryer should be kept clean frequentl.
The door glass should not be wiped with reactive chemical solutions, but should be wiped with a soft cotton clot.
If the freeze dryer is not used for a long time, wipe the exposed electroplating parts and apply neutral grease to prevent corrosion, and put a plastic film dust cover on it and place it in a dry room to prevent the electrical components from being damaged by moisture and affecting the us.
.