The hazard of the refrigerating oil in the new energy vehicle drive motor test system increases the condensation temperature and the condensing pressure; the condenser heat transfer deteriorates. Because the oil film produced by the oil entering the condenser has a thermal conductivity much smaller than that of the metal, the thermal resistance is increased and the heat transfer coefficient is reduced. The refrigeration oil in the new energy vehicle drive motor test system reduces the evaporation temperature and the evaporation pressure, and the compressor cooling capacity decreases, and the unit power consumption increases, making it difficult to cool down the cold. There are two reasons for this. On the one hand, it is consistent with the cause of the condenser; on the other hand, due to the accumulation of oil in the evaporator, the effective area of the evaporator is reduced.
The refrigeration oil in the new energy vehicle drive motor test system is prone to blockage, causing the system to work abnormally. This is mainly due to the high viscosity of the oil, which is easy to mix with dirt and mechanical impurities into a gel-like substance. When the gel-like substance accumulates in a pipe or valve with a small cross section, it is easy to cause blockage and cause refrigeration conditions. disorder. In order to avoid and reduce the entry of oil, the new energy vehicle drive motor test system, in addition to setting the oil separator with good performance and correctly grasping the fuel quantity of the compressor, the regular oil discharge work of the refrigeration equipment must be done during operation. In addition, you should also pay attention to the balance between the amount of oil added and released. If it is found that the amount of fuel added to the compressor is increased and the amount of oil released is reduced, the cause should be eliminated in time and the number of times of oil discharge should be increased to prevent excessive oil from entering the refrigeration system.
The impact of the refrigeration oil in the new energy vehicle drive motor test system is self-evident. It is recommended that the new energy vehicle drive motor test system adopt a fully enclosed circulation pipeline so that oil mist and refrigeration oil and other faults will not occur during operation.