What is the cooling principle of car air conditioning?
2 Answers
Car air conditioning cooling principle refers to the operational mechanism of air conditioning refrigeration. After the air conditioner is powered on, the low-pressure refrigerant vapor in the refrigeration system is sucked in and compressed into high-pressure vapor by the compressor, then discharged to the condenser. The indoor air continuously circulates, achieving the purpose of lowering the temperature. The outdoor air drawn in by the axial fan flows through the condenser, carrying away the heat released by the refrigerant, causing the high-pressure refrigerant vapor to condense into high-pressure liquid. The high-pressure liquid passes through the filter and throttle mechanism before being sprayed into the evaporator, where it evaporates under the corresponding low pressure, absorbing heat from the surroundings. Simultaneously, the cross-flow fan causes air to continuously enter the spaces between the evaporator fins for heat exchange, and the cooled air after releasing heat is directed into the cabin.
Hey, speaking of the working principle of car air conditioning, I find it quite interesting. Simply put, it relies on the circulation of a special liquid called refrigerant to absorb heat. The compressor compresses low-pressure gas into high-pressure, high-temperature gas and sends it to the condenser, where it is cooled by the fan at the front of the car and turns back into a liquid. Then, the liquid passes through the expansion valve, where it suddenly drops in pressure and temperature, flowing into the evaporator to absorb heat and evaporate into low-temperature gas. This process cools the air, which is then blown into the cabin. Finally, the gas is sucked back into the compressor to start the cycle again. The whole system works like a circulating freezer, relying entirely on the physical principle of phase change heat absorption. I really depend on it while driving, especially during hot summers—turning on the AC brings instant relief. Regularly checking the refrigerant level and cleaning the filter is crucial to avoid leaks or blockages, ensuring energy efficiency and safety, making long drives more comfortable.
