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In the process of using air-cooled low-temperature small chillers, sometimes feel the unit cooling capacity weakened, so that many people are distressed.
here small compilation for you to analyze in detail the cold water mechanism cooling capacity of the reasons for the weakening.
should first check the refrigeration environment, shell tube condenser fins / thread copper pipe to be cleaned with compressed air.
if this happens to the new machine, is it not cold enough.
the old machine, consider whether the shell tube evaporator inside the threaded copper pipe fouling, affecting the heat exchange effect of the unit.
is better to clean the shell tube evaporator regularly, and to check for leaks in the refrigerant.
Cold water mechanism cooling capacity is insufficient with the following exclusion methods: 1, whether it is the suction filter blockage, the loss of suction pressure is too large, resulting in a decrease in suction pressure, volume efficiency reduction, solution: remove the filter cleaning of the suction filter.
2, whether the suction pressure is lower than the evaporation pressure, check the corresponding valve.
3, whether the position of the spool is not suitable or other faults, check the indicator and adjust the position to access the spool.
4, chiller abnormal wear, resulting in too large a gap, adjust or replace parts.
5, whether the amount of fuel injection is insufficient, can not achieve the sealing effect, check whether the safety valve is sealed, check the oil pump, oil filter, oil road, improve the amount of oil.
between the high and low voltage systems, check the bypass lines used for driving and parking.
7, chiller exhaust pressure is higher than condensation pressure, volume efficiency is reduced: check the exhaust system lines and valves, the system seepage air should be eliminated.
8, whether it is a refrigerant leakage, refrigerant leakage will lead to a drop in evaporation pressure, method: stop and check the leak location.