Can car air conditioning be directly charged with refrigerant without vacuuming?
1 Answers
Car air conditioning cannot be directly charged with refrigerant without vacuuming. If the vacuum is not thoroughly performed, the air conditioning will not work effectively. Moisture in the air can freeze and block the expansion valve during cooling, and the high-pressure gauge needle will continuously fluctuate. Hazards of charging refrigerant without vacuuming in car air conditioning: It can cause the compressor's exhaust temperature to be higher than the refrigerant gas temperature; when air enters the system, the condensation pressure will gradually increase; the gas layer formed on the inner surface of the condenser's heat transfer tubes will increase thermal resistance, thereby reducing the condenser's heat dissipation capacity; water reacting with the refrigerant can produce acidic substances, leading to corrosion of pipes and equipment; water and refrigerant are immiscible, resulting in ice blockage at the expansion valve's throttle orifice. Correct method for charging refrigerant in car air conditioning: Prepare a complete and qualified refrigerant charging tool; connect the car air conditioning system to the charging tool adapter; perform vacuuming; inject liquid refrigerant from the high-pressure side to complete the refrigerant charging process.
