What is the most effective way to cool down the car with air conditioning?
2 Answers
Open all windows and switch to external air circulation. There are three key points to note when using car air conditioning: 1. Choose an appropriate temperature: Setting the temperature too low in summer can affect health. The optimal temperature for the human body is between 20°C and 25°C. Above 28°C, people will feel stuffy, while below 14°C, they will feel cold. Therefore, the car temperature should be maintained between 18°C and 25°C, as excessively low temperatures can make people sick. 2. Avoid immediately switching to internal circulation when entering the car in summer: While it may seem like this would cool the car faster, the effect is poor because the interior temperature is higher than the outside temperature. Instead, open the windows for ventilation first, turn on external circulation to expel the hot air, and switch to internal circulation only after the temperature inside the car has dropped. 3. Avoid prolonged use of air conditioning: Extended use increases pressure on the condenser, which can damage the cooling system. The air conditioning places a heavy load on the engine, which itself generates heat. In hot weather, some small-displacement cars may even experience boiling coolant, reducing air conditioning efficiency.
When I first get in the car, I always open all four windows to ventilate and let the hot air out, which makes the air conditioning work more efficiently. Then I start the engine and press the AUTO button on the AC, setting the temperature to the lowest. At this point, it's also important to remember to switch to recirculation mode, as it prevents hot air from entering the car, cooling it down faster. After a few minutes when the car cools down, I lower the fan speed to avoid the blower being too noisy. Using a silver sunshade when parked is particularly effective, as it reflects sunlight and reduces heat buildup inside the car. Additionally, I clean the AC filter once a month, as dust clogging the filter can reduce airflow and affect cooling. During every maintenance check, I ensure the refrigerant level is sufficient; if it's low, it needs to be topped up, otherwise, the AC performance will be compromised.
