How does an A.C works

  • Air conditioners and refrigerators work the same way.
  • Instead of cooling just the small, insulated space inside of a refrigerator, an air conditioner cools a room, a whole house, or an entire business.
  • Air conditioners use chemicals that easily convert from a gas to a liquid and back again.
  • Warm air from the room is sucked in through a grille at the base of the machine.
  • The machine has three main parts. They are a compressor, a condenser and an evaporator.
  • The compressor and condenser are usually located on the outside air portion of the air conditioner.
  • The evaporator is located on the inside the house, sometimes as part of a furnace.
  • The air flows over some chiller pipes through which a coolant fluid is circulating. This part of the machine works just like the chiller cabinet in a fridge.
  • The air then flows over a heating element (similar to the one in a fan heater)
  • A fan at the top blasts the air back through another grille into the room. If the heating element is turned down, the air re-entering the room is much cooler.
  • Meanwhile, coolant flows through the chiller pipes.
  • As it does so, it picks up heat from the air blowing past the pipes and evaporates, turning from a cool liquid into a hotter gas.
  • It carries this heat from inside the room to the outside of the building, where it gives up its heat to the outside air.
  • In the unit outside the building, there are lots of metal plates that dissipate the heat to the atmosphere.
  • An electric fan blows air past them to accelerate the process.
  • Over time, the heat inside the building gradually pumps away into the outside air.