The compressor of the refrigeration unit is a very critical part of the unit. The quality of the compressor is directly related to the stability of the unit. Therefore, regular maintenance is required. Common maintenance includes:
1. Replace lubricating oil
After the refrigeration unit is used for a long time, the oil quality of the lubricating oil will deteriorate, and the impurities and moisture inside the oil will increase, so it is necessary to observe and check the oil quality regularly. Once a problem is found, it should be replaced in time, and the grade of lubricating oil to be replaced must comply with the technical data.
2. Replace the dry filter
The dry filter is an important part to ensure the normal circulation of the refrigerant. Since water and refrigerant are incompatible with each other, if there is water in the system, it will greatly affect the operating efficiency of the unit, so it is very important to keep the inside of the system dry, and the filter element inside the drying filter must be replaced regularly.
3. Calibration of the safety valve
Both the condenser and evaporator on the chiller are pressure vessels. According to the regulations, a safety valve should be installed on the high-pressure end of the unit, that is, the condenser body. Once the unit is in an abnormal working environment, the safety valve can automatically release the pressure. In order to prevent possible damage to the human body caused by high voltage. Therefore, the regular calibration of the safety valve is very important for the safety of the whole unit.
4. Cleaning of condenser and evaporator
Since the cooling water of the water-cooled condenser is an open circulation loop, the tap water generally used is circulated through the cooling tower.
When the content of calcium salt and magnesium salt in the water is large, it is easy to decompose and deposit on the cooling water pipe to form scale, which affects heat transfer. Excessive scaling will also reduce the circulation section of cooling water, reduce the amount of water, and increase the condensation pressure.
Therefore, when the water quality of the cooling water used is poor, the cooling water pipe should be cleaned at least once a year to remove scale and other dirt in the pipe. There are usually two ways to clean the condenser water pipe:
① Use a special pigging gun to clean the pipe.
②Use a special cleaning agent to circulate and rinse, or fill it in cooling water, and then replace the solution after 24 hours until it is cleaned.