The main reason for the deterioration of central air conditioning refrigeration oil

The main reason for the deterioration of central air conditioning refrigeration oil

1. The main reason for the deterioration of frozen oil

　　1, mixed with water

　　 Due to the infiltration of air into the refrigeration system, the moisture in the air is mixed with the refrigerating machine oil after contacting it; the main reason for the deterioration of the refrigerating machine oil in Wuhan central air-conditioning is that when the refrigerant contains more water, the moisture will also be mixed into the refrigerating machine oil. When water is mixed into refrigerating machine oil, the viscosity will decrease, causing corrosion to metals. In the Freon refrigeration system, it will also cause "ice jam" phenomenon;

　　2, oxidation

During the use of refrigerating machine oil, when the compressor discharge temperature is high, it may cause oxidative deterioration. Wuhan central air conditioning, especially refrigerating machine oil with poor chemical stability, is more prone to deterioration. After a period of time, residues will form in the refrigerating machine oil. , Make the lubrication of bearings and other places worse. Organic fillers, mechanical impurities, etc. mixed into the refrigerator oil will also accelerate its aging or oxidation;

　　3, mixed refrigeration oil

When several refrigerating machine oils of different brands are mixed, the viscosity of the refrigerating machine oil will decrease, and even the formation of the oil film will be destroyed, which will damage the bearing; if two kinds of refrigerating machine oils of Wuhan central air-conditioning contain different properties of antioxidant additives, they will be mixed When they are together, it may produce chemical changes and form deposits, which will affect the lubrication of the compressor, so be careful when using them.

　　 4. There are impurities in the refrigerator oil.

　　 2. Selection criteria for refrigeration oil

　　 There are many varieties of refrigeration oil. In order to ensure the normal operation of the refrigeration compressor, it is necessary to understand the performance of refrigeration oil and select it correctly. The performance of Wuhan central air-conditioning refrigeration oil can be determined by many indicators. The following briefly introduces its main quality indicators.

　　Viscosity, viscosity is one of the important performance parameters of lubricating oil z*, it determines the bearing capacity of the oil film in the sliding bearing, the friction power consumption and the sealing ability of the sealing surface. The viscosity of Wuhan central air conditioner is usually expressed by kinematic viscosity, the legal unit is m2/s, and the common units are s (st) and centist (cst).