The choice of automobile refrigerant should also consider the cooling conditions and use environment of refrigeration device. The condensation pressure in operation should not exceed the specified value of the safe use conditions of the compressor. Automobile air conditioning can only use the air outside the car as the cooling medium, and the factors that affect it, such as air temperature, wind speed, solar radiation and thermal radiation, are constantly changing. Its working conditions determine that it can only choose high temperature (low pressure) refrigerant. In the past, R 12 was selected, but at present, Juhua R 134a refrigerant is selected.

Matters needing attention in refrigerant filling

1. It is forbidden to start the engine and turn on the automobile air conditioner during the process of filling snow seeds from the high pressure end.

2. In the process of filling snow seeds from the low-pressure end, it is necessary to start the engine and adjust the air conditioner of the car to the maximum. At this time, be sure to close the high pressure valve.

3. Take protective measures: wear protective glasses, rubber gloves and trousers.

Never put snow seeds on the car engine.

Please don't point the upper and lower covers of automobile air conditioner refrigerant at human body.