Whenever you click on the AC button of your car, an electromagnetic clutch gets activated. This clutch is situated near the compressor.
Due to the activation of this electromagnetic clutch, the piston inside the compressor starts moving left and right. As a result of piston movement, the compressor starts compressing the gas. As soon as gas starts compressing, its temperature increases. Along with the temperature, its pressure also increases. Generally, the pressure of the gas is allowed to increase until it reaches 10 to 15 bar.
This hot gas is then passed through a pipe to the condenser. As the gas passes through the condenser, its temperature starts to decrease. A radiator is also there which also help in reducing the temperature of the gas.
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One thing to note down here is that the temperature of the gas decreases but its pressure does not decrease. Inside the condenser, all the hot gas converts into the liquid. So, this liquid then passes through the receiver dryer. A receiver dryer checks whether there is any kind of gas or moisture is remaining in the pipe or not.
This liquid then passes through the expansion valve. The expansion valve has a small hole inside it, so as soon as the liquid passes through this small hole its pressure decreases. Also, it starts boiling.Then, it passes through the evaporator. After passing through the evaporator, all the cooled gas or cooled air is subjected to a rotating fan which spreads the cooled air inside the car. This entire process continues again and again.
Watch the video on next page to understand the working of the automotive air conditioning system-
So, that is all about the working principle of the automotive air conditioning system.In this article, we saw the components and the working principle of the Automotive Air Conditioning System.