What does the AC button on a car mean?
1 Answers
The AC button in a car is the switch for the air conditioning cooling system. Pressing the AC button will gradually lower the temperature inside the vehicle. The car air conditioning refrigeration system consists of a compressor, condenser, receiver-drier, expansion valve, evaporator, and blower, among other components. These parts are connected by copper pipes and high-pressure rubber hoses to form a sealed system. The basic process of car air conditioning refrigeration is as follows: 1. Compression process: The compressor draws in low-temperature, low-pressure refrigerant gas from the evaporator outlet and compresses it into high-temperature, high-pressure gas, which is then discharged from the compressor. 2. 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, releasing a significant amount of heat. 3. 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). 4. 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 the evaporation process, it absorbs a large amount of heat from the surroundings, and the resulting low-temperature, low-pressure refrigerant vapor re-enters the compressor. This cycle repeats continuously to achieve the purpose of lowering the temperature of the air around the evaporator.
