Cold storage operation management and compressor common fault handling

Cold storage operation management and compressor common fault handling 1. Startup and preparations Before starting the machine, check whether the valves of the unit are in the normal starting state, and check whether the cooling water source is sufficient. After connecting the power, set the temperature according to the requirements. The refrigeration system of the cold store is generally automatically controlled, but the first time it is used, the cooling water pump should be turned on, and the compressors should be started one by one after normal operation. 2. Operation Management Pay attention to the following points after the normal operation of the refrigeration system: 1. Listen to whether there is abnormal sound during the operation of the equipment; 2. See if the temperature in the warehouse drops; 3.Whether the cooling and heating of the exhaust air is clear, and whether the cooling effect of the condenser is normal 3. Ventilation and defrosting Fruits and vegetables will release some gas during storage, and accumulation to a certain degree will make the collection physiologically unbalanced, deteriorate and smell. Therefore, it is necessary to ventilate and ventilate frequently during use. Generally, it should be carried out in the morning with low temperature. In addition, the evaporator will form a layer of frost after a period of use in the cold storage. Failure to remove it in time will affect the cooling effect. When defrosting, cover the storage in the storage and clean the accumulated frost with a broom. Be careful not to knock hard. 4. Notes on the operation of cold storage equipment 1. For the evaporator of the air-cooled machine: always check the defrosting situation, whether the defrosting is timely and effective, it will affect the cooling effect and cause the liquid return of the cooling system. 2. Observe the operating state of the compressor frequently and check its exhaust temperature. During the seasonal operation, pay special attention to the operating state of the system and adjust the system's liquid supply and condensation temperature in a timely manner. 3. The operating unit should always observe the oil level and oil return of the compressor and the cleanliness of the oil. If it is found that the oil is dirty or the oil level drops, it should be resolved in time to avoid poor lubrication. 4. Listen carefully to the sound of the compressor, cooling tower, water pump or condenser fan, and find the abnormality in time, and check the vibration of the compressor, exhaust pipe and foot. 4.The internal cleanliness of the compressor is poor at the initial stage of maintenance of the compressor. After 30 days of operation, the refrigeration oil and filter drier should be replaced once, and after half a year of operation, it should be replaced again (depending on the actual situation). For systems with high cleanliness, the refrigeration oil and filter drier should be replaced once after six months of operation, depending on the situation. 6. The operating unit should always observe the oil level and oil return of the compressor and the cleanliness of the oil. If it is found that the oil is dirty or the oil level drops, it should be resolved in time to avoid poor lubrication. 7. For air-cooled units, the air cooler must be cleaned frequently to maintain a good heat exchange state. For water-cooled units: Always check the turbidity of the cooling water. If the cooling water is too dirty, replace it. Check the water supply system for bubbles, blisters, drops, and leaks. Whether the water pump works normally, whether the valve switch is effective, and whether the cooling tower and fan are normal. For chiller units: Always check the condenser for scaling problems and remove scale in time. 8. For the evaporator of the air-cooled machine, it is necessary to check the defrosting situation frequently. Whether the defrosting is timely and effective will affect the refrigeration effect and cause the liquid return of the refrigeration system. 9. Observe the operating state of the compressor frequently and check its exhaust temperature. During the seasonal operation, pay special attention to the operating state of the system and adjust the liquid supply and condensation temperature of the system in time. 10. Listen carefully to the sound of the compressor, cooling tower, water pump or condenser fan, and find the abnormalities in time, and check the vibration of the compressor, exhaust pipe and feet. 11. Maintenance of the compressor: The internal cleanliness of the initial system is poor, and the refrigeration oil and filter drier should be replaced after 30 days of operation, and again after six months of operation (depending on the actual situation). For systems with high cleanliness, the refrigeration oil and filter drier should be replaced once after six months of operation, depending on the situation.

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