What is the function of the dryer in a car's air conditioning system?

[OLorenzo]

The main functions of the car air conditioning dryer include three aspects: storing refrigerant, filtering impurities, and drying the environment. The principle is to evaporate moisture in the brake system by heating, thereby achieving the purpose of drying, preventing the moisture in the brake system from freezing and affecting braking. The specific functions are as follows: 1. Storing refrigerant: The air conditioning dryer contains the refrigerant required for the air conditioning system to work, and it can promptly mobilize the refrigerant to assist in its operation when the system is running. The greater the workload of the air conditioning system, the more refrigerant it requires. 2. Filtering impurities: The air conditioning dryer can filter out impurities generated in the car's pipelines and the air conditioning compressor, preventing the normal operation of the car's air conditioning system from being affected by clogged impurities. 3. Drying the environment: The air conditioning dryer can absorb moisture in the air conditioning system, drying its operating environment, and avoiding water blockages, ice blockages, or dirt blockages in the air conditioning refrigeration system.

[McAlana]

I've worked in an auto repair shop for many years and encountered numerous air conditioning failures. That little component called the dryer is crucial—it acts like a scavenger in the AC system, specifically absorbing moisture and impurities from the refrigerant. Moisture comes from the refrigerant or enters during maintenance. If not removed, it can freeze and clog the expansion valve or filter, leading to insufficient cooling. Impurities like dust can wear down the pipes and increase the compressor's workload. During routine maintenance, I recommend car owners replace the dryer every two years to avoid costly repairs. Neglecting it can lead to system corrosion, and repair costs can be much higher than replacement. Remember, checking the AC before summer is a good habit.