On refrigeration engineering of refrigeration oil: 1, compressor lubricants in refrigeration engineering usually called frozen oil, which plays an important role in the operation of the refrigeration compressor. Under normal circumstances, oil change air-conditioning unit is factory run a cooling season (or heating season) the replacement of a central air-conditioning oil transformation Xuzhou, then replaced periodically depending on the operating conditions. Because the unit during the assembly process, in order to prevent further leakage, use of welding methods, welding nitrogen welding process, but the filling of the nitrogen pressure is not big, big welding tainted point, that in the presence of air The case of welding, there are a lot of scale exist in the system, such as the scale of the refrigerant in the system operation, can hinder the transportation of oil from the minute the compressor rotor wear, and may block the oil supply capillary causing the unloading system failure, resulting in the unit normal operation can not be stable; 2, refrigeration compressor with lubricating oil during operation, lower compressor temperature, compressor seal the gap between acting parts and provide add, subtract load function, Therefore, the kinematic viscosity refrigeration oil, small amounts of moisture, copper corrosion, acid number and insoluble material must meet the standards. Through years of detection test, summed run need to be replaced once a year, time is running short in the northern region, can be replaced once every two years; a long time the use of air conditioning, there will be a variety of problems, how to distinguish Cooling System lack of fluorine? Should first start after air conditioners, air conditioning compressor allows continuous operation for half an hour, the following is summed up the problem: 1. From the outdoor unit charge fluoride mouth measured pressure is lower than 0.45MPa. The reason is lack of the refrigerant, resulting in the evaporation pressure drops. 2. dry pipe valve. Touch no clear sense of cool. The reason is the lack of fluoride, lead to the boiling point of the refrigerant within the evaporator reduces the refrigerant temperature increases the valve Xuzhou central air conditioning maintenance, the valve temperature. 3. frost tube valves. The reason is the lack of fluoride in Xuzhou used central air conditioning recovery, resulting in the liquid pipe pressure drop within the central air-conditioning, lowering the boiling point, the valve temperature is below freezing. The outdoor unit exhaust no thermal. The reason is lack of the refrigerant, resulting in condensing pressure and temperature decrease. 5. Open the indoor unit panel, removing the filter, it can be found only a small portion of the evaporator frost. This is insufficient refrigerant cooling area correspondingly reduced results. 6. drain hose drain with little or no drainage. The reason is that the evaporator cooling area is reduced, the area is also reduced condensation, condensation of water is reduced. 7. The outdoor unit gas liquid valve with oil. The reason is that the refrigerant and the refrigerant oil has certain mutual solubility, the refrigerant leak from the oil spill is attached around the leak. HIP me some central air plenum section of the installation of central air conditioning installed in the front of the indoor unit (the outlet side), and the other end is connected with the air duct, made of galvanized iron, containing foam rice. Its role is to stabilize the outlet pressure, eliminating the resonance and reduce wind noise caused by duct connection. More than a trailer unit of energy regulation mode controlled by a microcomputer, the outdoor central air conditioning units inverter compressor according to the needs of the indoor heat load and automatically adjust the working status of the compressor. When cooling, the outdoor refrigeration compressor refrigerant vapor absorbed from the condenser, after transporting compressed gas refrigerant to the indoor unit. Each indoor unit through which the return air to the air intake, were returned after a heat exchange chamber, the room temperature can be adjusted. Central air-conditioning maintenance of central air-conditioning | Sheng Erda refrigeration | Xuzhou central air conditioning repair phone provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, Xuzhou in Jiangsu Province of heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Sheng Erda refrigeration into the brilliant and you work for a better future!