What does the car air conditioner's internal circulation mode mean?
2 Answers
Car air conditioner's internal circulation mode refers to closing the airflow channel between the inside and outside of the vehicle, preventing external air from entering the cabin, and only circulating the existing air inside the car. The functions of car air conditioning are: 1. Cooling, heating, ventilating and purifying the air inside the vehicle; 2. Providing a comfortable environment for passengers, reducing driver fatigue and improving driving safety. The automotive air conditioning system, referred to as car AC, consists of refrigeration system, heating system, air purification device and control system. It is used to regulate and control the temperature, humidity, air cleanliness and airflow inside the vehicle compartment to maintain optimal conditions.
The car's air conditioning recirculation function is particularly useful in my daily driving. It means the AC system only circulates the air already inside the car without drawing in fresh air from outside. When it's scorching hot in summer, I always turn on recirculation before starting the AC, allowing cold air to quickly fill the cabin, saving both time and fuel. I also use it frequently in traffic jams to avoid inhaling exhaust fumes and dust, reducing pollution's impact on my health. But remember, prolonged use of recirculation may lead to CO₂ buildup and stuffy air, so I usually switch to fresh air mode after 30 minutes for ventilation. From my years of driving experience, this simple mode - activated by pressing the car icon button on the dashboard - works well in highly polluted areas or pollen-heavy environments, helping protect respiratory health.
