What is the ideal temperature for car air conditioning in summer?

[McLiam]

During summer, the car air conditioning can be set between 21-25°C, while in winter it can be set between 25-28°C. The temperature difference between the interior and the external environment should not be too large, as it may cause discomfort to passengers. Generally, the temperature difference between the inside and outside of a car should be within 10°C for sedans and 8-12°C for large buses. Below is an introduction to the working principle of the air conditioning system: After the engine starts, turn on the A/C switch, the electromagnetic clutch engages, transferring the engine's power to the compressor. The compressor circulates compressed refrigerant to the evaporator, where the refrigerant vaporizes, absorbing heat and producing cold air. The blower then delivers this cold air into the cabin.