Automotive High Pressure Side Auto Air Conditioning

Automotive High Pressure Side

High Pressure Side of the and low-pressure sides. Beginning with the pressure side as it goes from the engine to the inside of the vehicle:

Automotive A/C Compressor:

The compressor is a belt-driven pump attached to the crankshaft of the engine. When the refrigerant goes into the compressor, it is in a low-pressure gas form. Once the gas is inside the pump, it is compressed (hence, the name). The pump places pressure on the gas and forces it out to the condenser. Compressors can only compress gases, not liquids. As we go through the system, you’ll find there are other parts which capture the water that get into the A/C high pressure side loop.

A/C high pressure side compressor with clutch
Standard A/C high pressure side compressor with clutch

Automotive A/C Condenser:

The condenser is basically a radiator, and like the one in your car, its job is to radiate heat out of the system. The process of pressurizing the gas in the compressor and moving it to the condenser creates heat, but as the warm air flows through the twisting tubes of the condenser, it cools the refrigerant down and turns some of it into a liquid. As you know, when steam cools off, it condenses back into water and this is a similar process. The liquid refrigerant becomes a A/C high pressure side liquid, ready to be used for cooling.

Standard A/C high pressure side condenser with electric fan
Standard A/C high pressure side condenser with electric fan

Automotive A/C Receiver-Dryer:

To prepare this refrigerant for the evaporator, the liquid moves through a little reservoir installed in the line called the receiver-dryer. As you can guess, this component contains desiccants, small granules that draw out the water (like the ones in shoes, labeled “Do not eat.”). In the receiver-dryer, water that has entered the system is removed. If any water remains, it could possibly form ice crystals and damage the air conditioning system.

Standard A/C high pressure side refrigerant drier
Standard A/C high pressure side refrigerant drier

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