Why is there water dripping under the car after parking?

[DeGabrielle]

The phenomenon of water dripping under the car after parking is caused by the drainage system due to the significant temperature difference before and after the air conditioning cooling. Below is the relevant introduction to the causes and handling methods of the air conditioning system drainage: 1. Lowering temperature through the cooling system: Due to the high temperature inside the car, the cooling system needs to be activated to reduce the temperature. At this time, the moisture in the hot air inside the car will condense on the surface of the evaporator's heat-absorbing fins, which are at a very low temperature. The water droplets are then collected by the evaporator's plastic housing and drained out of the car through pipes. 2. Condensation of moisture on the pipe surface: The low-pressure pipes of the car's air conditioning system are not wrapped with insulating foam, making it easy for moisture in the air to condense on the pipe surface. Water droplets will also condense and gather at the lowest point of the pipes, dripping down.