In an air conditioning system, this hot gas is then circulated through a series of tubes, where it dissipates its heat. As the heat dissipates, the gas returns to a liquid form which can be circulated back inside.
This process of absorbing the heat from inside one space in this case, the inside of your car and dissipating it in an outside space is what produces the cooling effect. For many years, the gas used was freon, which is a known handling hazard. Since it was discovered that freon R was harmful to the earth's ozone layer, it has been phased out for automotive use and replaced with the slightly less efficient but harmless Ra refrigerant. Your air conditioning system is made up of a compressor, a condenser, an evaporator or drier , refrigeration lines, and a couple of sensors here and there.
Here's what they do:. All air conditioning systems have these basic parts, although different systems use various forms of sensors to monitor pressure and temperatures.
These variations are specific to the make and model of different vehicles. If you need to do some work on your car or truck's AC system, be sure to have a repair manual specific to your vehicle.
Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Download our catalogs and learn about programs, courses, tuition, fees, admissions and much more. State-of-the-art, , sq. Avondale campus will provide you with hands-on experience with everything from undercar maintenance to advanced diagnosis. Learn more here. It only takes a few minutes to learn about technician training opportunities.
I understand that my consent is not required to apply, enroll or make any purchase. By submitting this form, I further understand and agree that all information provided is subject to UTI's Privacy Policy available at uti. If you are someone who has always been curious about how car AC works, continue reading below for a deeper look into air conditioner theory, system components and system operation. The air conditioning system in a car works by manipulating refrigerant between a liquid and a gaseous state.
As the refrigerant changes states, it absorbs heat and humidity from the vehicle and allows the system to give off cool, dry air. To change the refrigerant between a liquid and a gaseous state, the air conditioning system works to control pressure and temperature. In the past, automobile air conditioning systems used R as the refrigerant.
R aka Freon is a very effective CFC-based chlorofluorocarbon refrigerant that is not flammable and not poisonous to humans. Manufacturers transitioned to Ra in the mids. The newest refrigerant is Ryf, which produces fewer greenhouse gases.
Europe requires the use of Ryf, and it will likely be the new standard in the United States in the near future. Automobile air conditioning systems have a few key components. Listed below are the main parts and their roles:. Because automotive air conditioning systems operate under pressure, they need to remain completely sealed from the surrounding environment. Anything that allows refrigerant to escape or contaminants to enter can cause a failure.
If a leak is present in any component, simply recharging the system with new refrigerant will be at best a temporary fix. Identify the leak, replace the faulty component, and then evacuate and recharge the system. Not only will a system leak stop the AC system from cooling, it can damage the compressor. The compressor can overheat and damage itself by trying to run with too little refrigerant in the system.
Compressors generally are not serviceable and are an expensive item to replace. To operate correctly, the AC condenser needs a steady flow of air through its fins. Road debris and dirt may reduce airflow, causing system malfunction. The condenser is mounted directly behind the vehicle grill, leaving it somewhat exposed and at risk for partial blockage. Almost every new car sold in the U. What was once considered a luxury is now an expectation. Automotive AC technicians diagnose and repair AC systems on a regular basis at dealerships and independent shops.
Technicians often hear customers complain about warm air, loud noises, and even water leaking inside the car! Skilled techs who can fix these problems are in demand. Does an automotive technician career sound like the right fit for you? Thinking about becoming an auto tech? Learn about how long it takes to become an automotive technician, salary, job outlook and more. Learn the automotive service writer job description, how to become a service writer, and where the career can take you.
This rate excludes graduates not available for employment because of continuing education, military service, health, incarceration, death or international student status. The rate includes graduates who completed manufacturer-specific advanced training programs and those employed in positions that were obtained before or during their UTI education, where the primary job duties after graduation align with the educational and training objectives of the program. UTI is an educational institution and cannot guarantee employment or salary.
The refrigerant then flows to the receiver-dryer, which contains filters to remove debris like dust and dirt and desiccants to remove moisture. From there, the refrigerant enters through the expansion valve or an orifice tube in some vehicles.
These parts allow the refrigerant to expand, which reduces the pressure. Lastly, the refrigerant enters the evaporator between 32 and 38 degrees Fahrenheit. The evaporator is in the cabin, rather than under the hood.
Its role is to absorb heat, and it does this by boiling the liquid refrigerant and converting it back into steam, so it can absorb the heat from the air inside the cabin. The evaporator also takes any humidity out of the air, increasing the cooling effect. Your cabin air filter can get dirty quickly, which prevents optimal airflow.
0コメント