What does the AC mode in air conditioning mean?

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The AC button is the air conditioning cooling button. Here is the relevant introduction about air conditioning: 1. Definition: Car air conditioning refers to the air conditioning device installed in the car, which can cool, heat, ventilate, and purify the air in the compartment, providing a comfortable riding environment for passengers, reducing driver fatigue, and improving driving safety. The air conditioning device has become one of the indicators to measure whether a car is fully functional. 2. Classification: According to the driving method, it is divided into: independent type (a dedicated engine drives the compressor, with large cooling capacity and stable operation, but high cost, large size and weight, mostly used in large and medium-sized buses) and non-independent type (the air conditioning compressor is driven by the car engine, and the cooling performance is greatly affected by the engine operation, with poor stability, mostly used in small buses and cars).