Water-cooled screw chiller is a common refrigeration equipment, which can be widely used in industrial, commercial, medical and other fields. Among them, the evaporator is an important part of the unit, which is mainly used to convert the refrigerant from liquid to gas and absorb the heat in the air to complete the refrigeration operation.
However, in the process of use, we sometimes find that the evaporator appeared in the refrigeration oil, this situation will have a negative impact on the normal work of the unit, the following we learn more about the causes and countermeasures.
The second reason for the emergence of freezing oil
1. Low temperature conditions
Water-cooled screw chiller evaporator in the low-temperature conditions, prone to the occurrence of freezing oil. At low temperatures, due to the evaporator internal temperature is too low, will make the refrigerant in the oil mixture becomes viscous, or even solidified, the formation of lubricant-like refrigeration oil. This can lead to insufficient engagement clearance and high internal pressure, reducing the refrigeration efficiency and operating life of the unit.
2. Poor operation of the unit
In the case of prolonged operation or improper maintenance of the unit, the oil or refrigerant oil leaked inside the evaporator will be mixed with the refrigerant in the refrigeration system, which will form the refrigeration oil. At this time it is necessary to maintain and overhaul the unit and replace the leaked oil or refrigerant oil in time.
Three solutions
1. Increase the temperature and pressure of the evaporator
If the unit is in a low-temperature working condition, consider adjusting the temperature and pressure of the evaporator to solve the problem of freezing oil. The specific method is to appropriately increase the pressure and temperature of the evaporator outlet, so that the refrigeration effect of the unit has been improved, reducing the chances of freezing oil.
2. Regular maintenance
For the unit to run for a long time or improper maintenance of the situation, the need for timely and regular equipment cleaning and overhaul work. Including the replacement of oil or refrigerant oil in the refrigeration system, cleaning the evaporator, etc., to ensure the stability and safety of the unit operation.