What refrigerant is generally used in car air conditioning?

[VanLena]

Currently, the refrigerants used in car air conditioning include R-12, R-134A, R-407C, R-404A, R-22, and R-410A. Here is relevant information about these refrigerants: 1. R-12 refrigerant has been phased out and banned; 2. R-134A refrigerant is currently the most widely used in the market; 3. R-404A refrigerant is mainly used in refrigerated truck cooling systems, but it is also required for one-drag-two-unit systems (freezer plus air conditioning); 4. R-407C refrigerant is currently the preferred choice for pure electric heating and cooling bus air conditioning and has been widely used in recent years; 5. R-22 refrigerant is only used in bus air conditioning systems by Carrier Corporation in the U.S., with limited market availability; 6. R-410A refrigerant is being tested in small batches by some manufacturers to achieve lighter, smaller, and more energy-efficient units.