When to Add Freon to the Air Conditioning?

[LaKing]

There is no fixed time for replacing the Freon in a car's air conditioning system. Generally, when the cooling effect of the car's air conditioning deteriorates, it's advisable to check if the Freon level is low and replace or add it if necessary. Principles of Freon in car air conditioning: 1. Freon has an average lifespan of several hundred years in the atmosphere, so most of the emissions remain in the atmosphere, with the majority staying in the troposphere and a small portion rising into the stratosphere. Freon molecules in the troposphere are very stable and hardly undergo any chemical reactions. 2. When they rise to the stratosphere, they decompose under strong ultraviolet radiation, and Freon molecules containing chlorine dissociate into chlorine atoms (called 'free radicals'), which then engage in a chain reaction with ozone.