What are the types of automotive air conditioning refrigerants?
2 Answers
Automotive air conditioning refrigerants include: R12, R134A, R407C, R404A, R22, R410A. The method for replacing automotive air conditioning refrigerant is as follows: 1. Install a manifold pressure gauge for vacuum extraction; 2. Install the refrigerant tank; 3. Fill the refrigerant from the high-pressure side, then close the valve after filling; 4. Use an electronic leak detector to check for system leaks; 5. Open the manifold pressure gauge and fill the refrigerant from the low-pressure side; 6. Close the valves on both the high and low-pressure sides when replacing the filling tank; 7. After replacement, open the purge valve to release air from the middle hose and manifold pressure gauge; 8. Check the refrigerant filling amount based on the pressure displayed on the manifold pressure gauge; 9. Once the refrigerant filling amount meets the requirements, close the low-pressure side valve and turn off the engine.
When it comes to automotive air conditioning refrigerants, I've done quite a bit of research. The most common types are R-134a and the newer R-1234yf. R-134a became popular after the 1990s because, unlike the older R-12, it doesn't harm the ozone layer, but its downside is the greenhouse effect issue. R-1234yf is now widely used in new cars, offering better environmental performance and being less flammable when leaking. Simply put, the refrigerant's role is to absorb heat and cool the air, with pressure and temperature changes in the system being crucial. When choosing, consider the vehicle model and year—don't add randomly, as it could damage the compressor. If the AC isn't cooling well, the refrigerant level usually needs checking. Professional shops use filling machines to recharge it, ensuring proper operation and avoiding valve connections. For regular maintenance, remember to check the refrigerant level at least once a year to extend the system's lifespan. The evolution of refrigerants, from the phase-out of R-12 to today's R-1234yf, reflects the momentum of environmental technology advancement.
