These auto air conditioner maintenance tips should help keep your car keep its cool, including how a / c works plus a trouble-shooter’s summary about automobile air-con.
Other than a radio, auto air conditioner is the most popular new-car accessory today. Over 75% off pride and joys unveil of the showroom with “factory air.” What’s more, annually a half-million used cars have air conditioning units added.
Auto Air conditioners Maintenance Tips
Despite the fact air conditioners are only slightly less common than rear-view mirrors, few car owners have any clear idea the way one works or the way to turn if it doesn’t. It’s a mysterious realm where normally adventurous amateur mechanic fears to tread. You will find some basis for this reluctance. Any air-conditioner problem that needs opening the pressurized system to the atmosphere should more likely left with the pros, that have the expensive tools and expertise needed. But lots of common problems miss drastic measures so are easily the fingertips of a shade-tree mechanic. Or perhaps if you don’t be entitled to that title, and decide to leave the job to others, you’ll need to be if you be aware of the trouble.
Can Auto Air cooling Work?
It’s totally simple: A truck air conditioner – along with its close kin, the place air conditioner additionally, the refrigerator – moves heat. Refrigerant picks warm up inside the car and carries it outside. Technically termed a vapor-compression cooler, an air conditioner utilizes two basic physical principles to capture and release heat:
1. Each time a liquid changes with a gas (boils), heat is absorbed; in the event the gas condenses, the identical amount of heat is released. The amount of heat required to vaporize a pound of water, to make the leap from 211 degrees to 212 degrees Fahrenheit, is 970 Btu (British thermal units). By contrast, it takes only 1 Btu to acquire from 210 degrees Fahrenheit to 211 degrees. It’s this transformation of phase that enables an air conditioner to build so much train of a a little bit of refrigerant.
2. The volume of pressure for a liquid or gas affects both its temperature and therefore the temperature for it boils or condenses. In particular, if you apply 20 pounds per sq . in . (psi) of pressure to 211 degrees water, it would warm to 257 degrees and will certainly on the verge of boiling. Because temperature and pressure are related, jimmying with either as appropriate provides gases that they are changed to liquids (and vice-versa) with comparative ease.
A motor vehicle air conditioner moves heat by getting a liquid to resemble a gas around the passenger compartment (thus absorbing heat) and after that returning the gas to liquid form beyond the passenger compartment (where it provides up heat). The liquid is now refrigerant-12 (often called R-12 or Freon, the DuPont trademark). R-12 is utilized because it happens to have a stable and convenient boiling point (19 degrees at 20 psi). Otherwise, it just doesn’t have magical properties. In reality, R-12 has a few disadvantages as compared with its mundane relative, water: When come across flame or hot metal, it forms poisonous phosgene gas. Also, everyone of chlorofluorohydrocarbons is implicated in your destruction of this earth’s protective layer of stratospheric ozone.