How does the car air conditioner cool?
3 Answers
The main methods for car air conditioning cooling are: 1. Insert the key into the ignition slot and turn it to start the vehicle. 2. Turn on the car air conditioning knob, which can be adjusted to four levels: 1, 2, 3, and 4. The higher the level, the greater the airflow. 3. Adjust the air conditioning to the cooling setting, which is the blue area shown in the figure below. The lower the setting, the stronger the cooling effect. 4. Press the A/C button and adjust the air conditioning to the cooling setting. The car air conditioner will blow cold air. Additional information: 1. The car air conditioning system is a device that cools, heats, ventilates, and purifies the air inside the vehicle cabin. 2. It provides a comfortable environment for passengers, reduces driver fatigue, and improves driving safety. The air conditioning system has become one of the indicators for measuring whether a car is fully equipped.
The car air conditioning cooling process is actually quite fascinating. When you turn on the AC, the compressor springs into action - it sucks in low-temperature, low-pressure gaseous refrigerant and compresses it forcefully into a high-temperature, high-pressure gas. This hot gas then flows to the condenser located in front of the engine compartment, where the cooling fan blows air to reduce its temperature, transforming it into a high-pressure liquid. After passing through the receiver-drier to filter out impurities, this liquid refrigerant undergoes sudden pressure reduction through the expansion valve, instantly becoming a low-temperature, low-pressure mist-like mixture that evaporates and absorbs heat in the evaporator. The blower then forces the cabin's warm air over these cold evaporator coils, where the heat gets absorbed, turning the air into cool breeze that's circulated into the cabin. The entire process involves the refrigerant continuously changing states within this sealed system, constantly moving heat around.
Let me explain how the air conditioning blows cold air. The key lies in the refrigerant liquid constantly circulating through the AC system. The compressor compresses it into a hot, dense state, and this heated substance then reaches the condenser where it's cooled by the fan and driving wind, turning into liquid. Next, it passes through a small checkpoint called the expansion valve in front of the evaporator near the passenger side, suddenly expanding in volume and cooling down into icy mist. At this point, the blower draws warm air from the cabin through the chilly evaporator, where the heat is absorbed, and the air becomes cold before being blown out. The remaining refrigerant, now carrying the absorbed heat, returns to the compressor to start another cycle. So when we turn on the AC for cooling, we're essentially commanding this system to work hard at removing the heat from the cabin.
