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The car air conditioner works the same way "regular" cyclic AC units do. A refrigerant in a vapor or gaseous state arrives at the compressor, which is mounted on brackets by the engine and is run by a belt, and gets compressed. This heats it up as well as increases its pressure - just as you'd expect according to standard gas laws. The hot gas (or vapor) is pumped to the AC condenser. The condenser is in the front of the car by the radiator for the engine coolant. The radiator and the AC condenser kinda look the same. Anyway, the outside air, which is either "pulled through" by a fan or forced through as the vehicle moves down the road, passes across the elements of the condenser and removes heat from them and, thereby, the refrigerant. From the condenser, the now-cooler refrigerant is handled by an expansion valve, and as the vapor comes out of this component, it is abruptly depressurized, which causes very rapid cooling. Again, basic gas law stuff. The cooled refrigerant changes phase to a liquid, and pressure in the system forces it on to and then through the evaporator inside the passenger compartment of the car. Here a fan blows vehicular inside air through the evaporator, and the really cold liquid refrigerant "soaks up" the heat in the air. Cold air is then blown out through the vents in the car to cool the passenger compartment. In the evaporator, the vapor in liquid form changes phase to a vapor as it absorbs thermal energy from the air being blown over it by the fan inside the duct work. From the evaporator, the refrigerant returns to the low pressure side of the AC compressor to begin the cycle anew. There are basic principles of thermodynamics at work here. When something is hot, it "sends" thermal energy out to a cooler place. If something is cool, it will "absorb" (or sink) heat. The greater the difference in temperature between the "hot" thing and the "cool" thing, the greater the "thermal pressure" to move heat. Simple and easy. Now add terms like temperature differential or thermal gradient to mean the difference in temperature, and a few other ones, and you'll be talking like a grad student defending his thesis!

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โˆ™ 2008-10-20 00:12:04
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Heating Ventilating and Air Conditioning

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Related questions

What is CFCs and why are they no longer being used in car air air conditioners?

CFC's are harmful for ozone layer. Thus they are not used in air conditioners now.

What are the different types of home air conditioners that are available?

Different types of home air conditioners are: Central Air Conditioners Split System Air Conditioners Packaged Central air conditioners Portable air conditioners Ductless air conditioners and, Evaporation Coolers

How is a vacuum switch installed for car air conditioners?

Under it.

Why are air conditioners important?

The air conditioners make the room, car etc. cooler so that you do not have to open a window ir use a fan. The conditioner itself works similar to fridge.

Learning about air conditioning.?

Try This is a good page for learning how air conditioners work. Please also try going to as well.

How many amps for 12000 btu?

The Amps means the volume of flow of electricity. The Amps depends on its BTU (British Thermal Unit). BTU is the unit to measure the energy that is consumed to perform some Air Conditioner. 12000 BTU Air conditioners uses 5 to 6 Amps. 18000 BTU Air conditioners uses 9 to 10 Amps. 12000 BTU air conditioners also called 1 Ton AIR CONDITIONER and 18000 BTU Air conditioners are called 1.5 Ton and so on. The 2 Ton or 24000 BTU Air conditioners use 15 Amps to work.

Which car models have the best air conditioners?

ford focus has the air conditioning and coolant it says "coolest in its class"

Are there any air conditioners on the market that will not dry out the air in the house?

Unfortunately, part of the way air conditioners work involves lowering the humidity in the room. Try purchasing a humidifier (and using cool water).

Can you use the same coolant in car and home air conditioners?

Refrigerant - not coolant - and no, they are not compatible.

Where was air conditioners invented?

When was Air Conditioners invented

What is the temperature range of air conditioners?

depends on brand of air conditioners

Where is the ac air filter located on 2000 cirrus?

Most air filters for car air conditioners are located behind the glove box

How does air conditioners work to cool off your house inside?

it pulls all hot air out from the house

Where can one buy Panasonic air conditioners?

Panasonic air conditioners can be purchased from numerous stores. Sears, Home Depot, and Lowe's sell Panasonic air conditioners. One can also purchase the air conditioners from the Panasonic website.

How do you work out the difference from mpa to psi in air conditioners?

find a conversion chart

What are the advantages of cabinet air conditioners?

Cabinet air conditioners produce clean air and don't allow outside air to enter inside them. All the air that flows through these air conditioners is filtered and compressed.

What is the cheapest brand of window unit air conditioners?

The Honeywell air conditioners are very cheap, well-secured and make great window air conditioners.

When were auto ac invented?

The Packard Motor Car Company was the first automobile manufacturer to build air conditioners into its cars, beginning in late 1939. However, the first production cars to have air conditioners were made in 1953.

Do air conditioners blow out warm air?

All air conditioners work by removing energy from one liquid and putting it in another liquid. Usually, the two liquids are the same. They blow air over the cold liquid which cools the room. They blow air over the hot liquid to the outside. With valves, air conditioners can be made to blow hot air inside and cold air outside. That is called reverse cycle.

How can I find a certified technician who repairs air conditioners?

Go to and type in your area code to find a local certified technician for repairing air conditioners. The contractors who work for Service Magic are certified.

Are there any portable air conditioners that are energy star rated?

no there are no portable air conditioners.

Where can I find air conditioners?

Find the right air conditioners and heaters at the right prices from offer the best air conditioners ever sale on the united states of america.

What are HVAC technicians?

HVAC technicians are Heating Ventilation, and Air Conditioning Technicians, we work on air conditioners and refrigeration stuff

Is there any way to make air conditioners quieter?

You have to purchase air conditioners with the quieting option.

Where can one purchase Rheen air conditioners?

You can purchase Rheem Air Conditioners online from stores such as The Home Depot. You can also purchase Rheem Air Conditioners used from eBay or Craigslist.