The automotive air - conditioning system brings a comfortable cool environment to passengers in hot weather. In this system, although silicone oil is not the main refrigerant, it plays an important role in assisting the refrigerant and improving the cooling efficiency.

1. Lubrication and Collaboration of Silicone Oil in the Compressor

• The Role of Silicone Oil in the Compressor：Inside the automotive air - conditioning compressor, silicone oil, as a high - quality lubricant, is crucial for the efficient operation of the compressor. The piston, connecting rod, bearings, and other components inside the compressor, during high - speed operation, generate a large amount of heat and wear due to mutual friction. Silicone oil, with its appropriate viscosity and good lubricating performance, can form a uniform and firm lubricating film on the surfaces of these components, greatly reducing the coefficient of friction between the components, reducing wear and energy consumption, and improving the mechanical efficiency of the compressor.
• Collaborative Work with the Refrigerant：In addition, silicone oil has good compatibility with the refrigerant and can circulate with the refrigerant in the air - conditioning system. When the refrigerant is compressed in the compressor, silicone oil can help the refrigerant better achieve state changes and improve the compression efficiency. After the refrigerant enters the evaporator and condenser, silicone oil can also play its unique role in assisting the refrigerant in heat exchange.

2. Auxiliary Functions in the Evaporator and Condenser

• Enhanced Evaporation in the Evaporator：In the evaporator, the refrigerant needs to change from a liquid state to a gaseous state, absorbing the surrounding heat to achieve the cooling effect. Silicone oil can reduce the surface tension of the refrigerant on the evaporator surface, making it easier for the refrigerant to evaporate and enhancing the cooling capacity of the evaporator. At the same time, silicone oil can help the refrigerant distribute more evenly on the heat - exchange surface of the evaporator, improving the heat - exchange efficiency, enabling the evaporator to more effectively absorb the heat inside the vehicle and quickly cool down the interior.
• Efficient Condensation in the Condenser：In the condenser, the gaseous refrigerant needs to be cooled and condensed into a liquid state. Silicone oil can promote the heat - transfer process inside the condenser and accelerate the condensation speed of the refrigerant. It forms a thin