Car air conditioning, how does it work?

The best way to cool off in the heat inside your car is to use the air conditioner, but do you know how a car air conditioner works? In this article, the World of Electrical explains how car air conditioning works and whether it uses the car’s battery power.

Some people think that the car’s air conditioner runs on electricity from the car battery. This thought is even understandable, as the air conditioning in a house works through a compressor connected to electricity . So it is common to have doubts about whether the air conditioning in a car also works on the electricity of the car battery.

Air Conditioning for Cars

Air conditioning is a cooling system aimed at air conditioning the environment, bringing thermal comfort to people. In cars, air conditioning has the function of providing thermal comfort to passengers during their travels.

Air conditioning by car.

what many people think, air conditioning for cars doesn’t just work with the vehicle’s battery. The air conditioning used for cars takes advantage of the engine turning, which through a pulley makes the compressor work. This pulley transfers the energy from the engine turning to the compressor, so we can say that the compressor works mechanically. However, this mechanical characteristic of a car’s compressor does not totally dispense with the use of electrical components or battery power.

During the entire time the car is running, the pulley is rotating in sync with the engine turning, but this does not guarantee that the compressor is running. The operation will only happen when there is a coupling of this pulley with the compressor shaft through an electromagnetic clutch.

The activation of the electromagnetic clutch and the temperature control of the air conditioning takes place by means of electrical circuits powered by the battery, with one or more pressure switches, thermostats, relays. There are also internal and external fans that need electrical energy from the batteries to exchange air both inside and near the condenser.

Air conditioning for car care

Traveling in the comfort of an air-conditioned car is very good, but in order not to jeopardize the functioning of the air conditioning it is necessary to maintain it at least every six months, and this maintenance must always be done. The most common defects to happen in the air conditioning of cars are:

  • Condenser fan defect
  • Compressor defect
  • The emergence of bad smells
  • Refrigerant gas leak
  • Compressor fuse is blown
  • Defective compressor belt
  • Lack of compressor belt

Does air conditioning make the car use more fuel?

A frequent question is whether the vehicle’s fuel consumption increases with the air conditioning on. Unfortunately, gasoline consumption increases when the car is air-conditioned, and this is because when the air conditioning pulley engages more load will be added to the engine shaft, and naturally it will be necessary to burn more fuel to generate energy and maintain everything working.

An interesting observation is that walking on the road with the windows open at more than 80 km / h can be less economical than you think because this causes an interference in the aerodynamics of the car and with that, the car will also spend more fuel since the lateral wind input does interfere in the performance. So in some cases, it pays to turn on the car’s air conditioning and close the windows.

The use of the car battery worries some owners, as they understand that the use of the car’s electrical functions such as air conditioning, sound, electric glass, etc. can cause the battery to discharge. Below we will leave a video from the World of Electrical showing how to test the car battery.