Which one is the car air conditioning cooling?
2 Answers
The cooling switch for the car air conditioning is the AC button. The car air conditioning cooling system consists of a compressor, condenser, receiver-drier, expansion valve, evaporator, and blower, among other components. These parts are connected by copper pipes (or aluminum pipes) and high-pressure rubber hoses to form a sealed system. When the cooling system operates, the refrigerant circulates in different states within this sealed system to lower the temperature of the air around the evaporator. To use the cooling function, you need to press the AC button. Compression process: The compressor sucks in the low-temperature, low-pressure refrigerant gas from the evaporator outlet and compresses it into a high-temperature, high-pressure gas, which is then discharged from the compressor. Heat dissipation process: The high-temperature, high-pressure superheated refrigerant gas enters the condenser. Due to the reduction in pressure and temperature, the refrigerant gas condenses into a liquid and releases a large amount of heat. Throttling process: The higher-temperature and higher-pressure refrigerant liquid passes through the expansion device, causing its volume to increase and its pressure and temperature to drop sharply, exiting the expansion device as a mist (fine droplets). Heat absorption process: The mist-like refrigerant liquid enters the evaporator. Since the boiling point of the refrigerant is much lower than the temperature inside the evaporator, the refrigerant liquid evaporates into a gas. During this evaporation process, it absorbs a large amount of heat from the surroundings, and then the low-temperature, low-pressure refrigerant vapor re-enters the compressor. Precautions for using air conditioning in the car: Do not set the air conditioning temperature too low. A large temperature difference between the inside and outside of the car can easily cause the driver to catch a cold, and excessively low temperatures may also pose a risk of arthritis for passengers. Control the direction of the air vents. Based on the principle that cold air sinks and hot air rises, when using the air conditioning, you can follow the rule of directing the vents upward when cooling and downward when heating. Do not turn on the air conditioning immediately after the car has been exposed to the sun. After the car has been exposed to the sun, the interior temperature will be very high. First, open the windows for ventilation, and only turn on the air conditioning after the hot air has been expelled.
Turning on the air conditioning for cooling is quite straightforward. After starting the car, locate the AC control area on the center console and press the button with the snowflake symbol or labeled 'A/C' to activate the cooling system. Then, adjust the temperature control knob to set a lower temperature, such as below 22°C, to engage the cooling mode. For vehicles with automatic climate control, simply press the 'AUTO' button, and the system will intelligently adjust fan speed and temperature for faster cooling. Don’t forget to check if the recirculation mode is on to prevent cool air from escaping and affecting efficiency. In daily use, cooling relies on the compressor's operation—once activated, it draws in air, cools it, and blows out cold air. Having driven for years, I prefer opening the windows to release heat before closing them and turning on the AC in summer—it saves fuel and works efficiently. Keeping the fan at medium speed is ideal, as high speeds can be distracting. Regular maintenance prevents insufficient cooling, and cleaning a dusty filter is essential. If cooling seems slow, don’t worry—sometimes the compressor takes a few dozen seconds to activate.
