How does the pilot Freeze Dryer's vacuum pump go into the water?

How does the pilot Freeze Dryer's vacuum pump go into the water?

During the actual use of the pilot Freeze Dryer, the vacuum pump water inlet phenomenon sometimes occurs, which leads to frequent replacement of the vacuum pump oil by the customer. The cost is quite large, and the performance and life of the vacuum pump are affected, which affects the normal production of the customer. The reasons for the impact of the pilot Freeze Dryer vacuum pump involve two major aspects: airflow problems, refrigeration and vacuum problems, mainly related to airflow, airflow, system cooling, associated temperature, pressure, vacuum configuration and control processes, etc. Several aspects do not independently affect the water intake of the vacuum pump. Actually, it should be mutually influential. To solve the water inflow of the vacuum pump, it is necessary to comprehensively consider these factors. The following is a detailed explanation for everyone.
Air flow problem
The airflow problem affects the water inlet of the vacuum pump. The main phenomenon is that the frost on the surface of the coil in the condenser (water trap) is uneven, and the thickness of the frost is different at different positions of the coils of each group. Even in the coil part, there is no frosting. When the cooling capacity meets the requirements of full load, the temperature of the coil can be reached, that is, the coil temperature and vacuum are sufficient to capture the full distribution of water vapor. The direction did not pass through part of the coil, resulting in the inability to capture water vapor and then into the vacuum pump.
2. Refrigeration and vacuum configuration issues
The reasons for the refrigeration and vacuum problems are mainly due to the rationality of the configuration of the refrigeration system, the effectiveness of the refrigeration capacity of the compressor and the configuration of the matching expansion valve, etc., when the phenomenon of the water inlet of the vacuum pump occurs, the problem of adjustment of the refrigeration condition is excluded. For example, the adjustment of the expansion valve, the leakage of the refrigeration system, and the abnormality of the pressure and temperature indicators of the refrigeration system. The problem of refrigeration can be considered from the following perspectives.
In addition to refrigeration capacity and individual conditions, airflow organization, airflow path, airflow direction, vacuum configuration and control process are the key factors affecting the water intake of the vacuum pump. It is an important concern for solving and improving the water intake of the vacuum pump. The dryer, the greater help to the whole system is: can optimize the working efficiency of the refrigeration system, vacuum system and even the circulation system, improve the rationality of the whole machine configuration, and even effective for the freeze-drying process of the product, including the freeze-drying cycle. Improvement.