Frequently Asked Questions and Solutions for Freeze Dryer "Experience Sharing"

　　I believe everyone is very familiar with the function and principle of the freeze dryer. The freeze dryer is mainly a new type of equipment for freeze-drying and preserving various fresh foods, fruits, vegetables, vaccines, cosmetics and precious Chinese medicinal materials. It is often used in practice, especially in processing industries, pharmaceutical factories, disease control centers, and hospitals. Then the freeze dryer will also have some common problems. When we encounter common problems, how should we quickly solve and lock-related problems? Let the editor of Dachang give you some popular science on related problems and corresponding solutions:

　　First of all, we understand that the freeze dryer is a drying technology based on the principle of sublimation. It is a process in which the dried materials are quickly frozen at low temperatures, and then the frozen water molecules are sublimated into water vapor in a vacuum environment. The products obtained through freeze drying are called freeze-dried products, that is, freeze-dried products.

　　The material is always at a low temperature (frozen state) before drying, and the ice crystals are evenly distributed in the material. The sublimation process will not cause condensation due to dehydration, avoiding side effects such as foaming and oxidation caused by water vapor. Dry matter is spongy, porous, and remains essentially unchanged in volume. It is easily soluble in water and restored to its original state, preventing physical and biological degradation of dry matter to a large extent.

　　Frequently Asked Question 1: The power supply voltage is unstable

　　It is understood that the normal working power supply voltage of the freeze dryer is 215-225V. If the voltage deviates from the allowed range, the compressor will not work efficiently or even at all. For the problem of unstable power supply voltage, the solution is to replace the qualified power supply when the power supply voltage is unqualified; when the power supply voltage is unstable, an AVR (220V) or voltage regulator can be used on the original working power supply.

　　FAQ 2: Indoor temperature is higher than 30℃

　　The freeze dryer needs to operate in a suitable environment. When the indoor temperature is higher than 30℃, the condenser may not be able to condense, so the system will malfunction. The maintenance method at this time is that if the indoor temperature is around 28℃, the user can open the back door of the condenser or open the room door to optimize ventilation and cooling conditions.

　　FAQ 3: Indoor temperature is below 0℃

　　The indoor temperature is too high or too low. If the indoor temperature is lower than 9℃, the compressor oil will become viscous and easily affect the normal operation of the compressor. In addition, when the temperature is too low, all electronic components may be affected and malfunction may occur. In response to this situation, the maintenance method recommended by technicians is that when the ambient temperature is below 0°C, other heating equipment can be used to increase the ambient temperature and keep the temperature above 5°C and below 30°C.

　　FAQ 4: Too much dust on the freeze dryer or in the environment

　　It is understood that if there is too much dust covering the condenser and compressor, it is easy for the condenser to fail to achieve the condensation effect, which directly affects the performance of the compressor. Therefore, regular dust removal is essential. The industry recommends that if there is too much dust in the environment, users can regularly remove the dust covering the compressor and condenser every month. To ensure that the equipment is not damaged, use a soft brush to remove dust from the compressor, condenser and pipes.

　　Routine maintenance of freeze dryer

　　1. Before starting the freeze dryer, you need to check whether the condenser on the back of the machine is clean to avoid poor heat dissipation.

　　2. Check whether the safety device is reliable before starting the freeze dryer.

　　3. After the machine runs for 10 to 20 minutes, check whether the working pressure and working current are normal.

　　4. After passing in the compressed air, run it for 10 to 20 minutes to check whether the automatic drainer is draining.

　　5. Please open the drain valve of the machine more than twice a week.

　　6. The manual drain valve of the machine needs to be drained more than twice a day.

　　7. When the ambient temperature is high, please check whether it exceeds 40℃. If it exceeds, please make improvements.

　　In summary, the above is all about the common problems and solutions of freeze dryers. The above content is for reference only. Specific situations can also be solved with specific methods. If you encounter something you don’t understand, you can contact our engineers to answer your questions.

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