What should be paid attention to when the refrigeration compressor stops abnormally

What should be paid attention to when the refrigeration compressor stops abnormally 1. Sudden power failure and shutdown

If there is a sudden power failure when the refrigeration compressor is running, you should first cut off the power switch and immediately close the compressor's suction valve and exhaust valve, and close the liquid supply valve at the same time, and stop the liquid supply to the evaporator, so as to avoid the evaporator when the machine is started next time Too much liquid causes wet compression.

　　 2. Suddenly stop water and stop

　　 If the cooling water is suddenly interrupted, the power supply should be cut off immediately, and the operation of the refrigeration compressor should be stopped to avoid excessive condenser pressure. After the compressor is stopped, the suction and discharge valves of the compressor and the relevant liquid supply valve should be closed immediately, and the cause should be found to eliminate the fault and the water supply should be restored before starting.

　　3, a part is damaged and shut down

　　 When the compressor is in urgent need of shutdown due to damage to a certain component of the compressor during operation, if time permits, the normal shutdown operation can be performed. If the situation is urgent, the motor power supply must be cut off, and the suction and exhaust valves and the liquid supply valve should be closed. If the refrigeration equipment runs out of ammonia or the refrigeration compressor fails, the workshop should be cut off and wear gas-proof clothing and masks for emergency repairs. At this time, all exhaust fans should be turned on, and water can be used to pour the leaking ammonia area if necessary to facilitate emergency repairs.

　　4, shutdown in case of fire

If a fire in an adjacent building endangers the safety of the refrigeration system, the power supply should be cut off, and the exhaust valves of the receiver, condenser, ammonia oil separator, and evaporator should be opened quickly, and the emergency ammonia unloading device and its water valve should be opened quickly , Make the system's ammonia liquid concentrated in the emergency ammonia discharge port and be diluted by a large amount of water to prevent the spread of fire and explosion.

　　 5. Shutdown on wet stroke

　　 If the refrigeration compressor has a wet stroke during operation, it should be dealt with according to its severity. For a slight wet stroke, the suction valve or expansion valve should be closed or closed. For severe wet strokes, stop and close the suction valve and expansion valve immediately. After a severe wet stroke occurs, the refrigerant in the crankcase should be discharged, or other refrigeration compressors should be used to extract the refrigerant in the crankcase and the cylinder, and at the same time replace the lubricating oil, vacuum, and pressure test before leaking. Start the test machine.

　　 After reading the above problems and operation methods, you don’t have to panic when you encounter these abnormal shutdown problems in the future!