What is the function of a car air conditioner?

[Ricardo]

Car air conditioners serve the functions of temperature regulation, humidity regulation, and airflow regulation. Temperature Regulation: This is the primary function of a car air conditioner. In summer, the cooling system produces cold air to lower the temperature inside the cabin. In winter, except for large commercial vehicles that use independent combustion heaters for heating, most other vehicles utilize waste heat from the engine for heating. Humidity Regulation: Humidity significantly affects the comfort of passengers inside the car. The humidity inside the cabin should generally be maintained between 30% and 70%. Standard car air conditioners do not have the capability to regulate cabin humidity; this can only be achieved through ventilation systems or advanced luxury cars equipped with integrated heating and cooling air conditioners. Airflow Regulation: The speed and direction of airflow greatly influence passenger comfort. If the air is blowing directly, the speed should be limited to a certain range when the temperature is appropriate. The airflow speed can be adjusted based on factors such as the passengers' living environment, age, health condition, and personal preferences for warmth or coolness.