Analysis of Causes for Exhaust Malfunctions of Screw - type Chiller Compressors

The refrigeration compressor of a screw - type chiller has a simple structure with a small number of components. It doesn't have vulnerable parts such as air valves and piston rings. Its main friction components like rotors and bearings have relatively high strength and wear - resistance, and also enjoy good lubrication conditions. As a result, it requires less machining, has low material consumption, a long operation cycle, is relatively reliable in use, easy to maintain, and conducive to the realization of automated operation.

Even the best equipment may develop some malfunctions after long - term operation. In particular, the refrigeration compressor of a screw - type chiller should be given special attention!

When using a screw - type chiller, if the compressor's exhaust is abnormal, a careful inspection is needed to identify the specific malfunction. If the compressor's suction temperature is higher than the evaporation temperature, it may be due to the following aspects: Insufficient refrigerant in the refrigeration system, and adding refrigerant can be considered; Insufficient refrigerant in the evaporator of the screw chiller may also cause compressor malfunctions, and the flow valve needs to be opened wider; If the water content in the refrigeration system exceeds the specified value, it may cause malfunctions, so the water content should be checked regularly; Pay close attention to the regulating valve.

Once the liquid supply is small, increase the liquid supply in a timely manner; Regularly check the pipeline insulation layer in the refrigeration system. Once there is a problem, replace the insulation material promptly.

Secondly, if the compressor's exhaust temperature of the screw chiller is higher than the temperature corresponding to the pressure, the following aspects need to be checked: Check the exhaust valve. Once the exhaust valve is broken, open the cylinder to check the valve plate in a timely manner; Check whether the safety valve is leaking and repair it promptly; Check whether the piston ring is leaking and repair or replace it if there is a problem; Check whether the gasket under the cylinder liner is leaking and check and replace it in a timely manner.

In addition, for the malfunction of the compressor of the screw - type chiller having too low suction pressure, the following aspects need to be addressed and resolved: Check whether the throttle valve or filter in the screw - type chiller is blocked.

Once a problem is found, check and clean it promptly; Check whether there is sufficient refrigerant in the refrigeration system and the evaporator and replenish refrigerant in a timely manner; Check whether there is too much oil in the refrigeration system and drain the oil if there is an excess.