the first liquid to endothermic, liquefied gas to heat. Freon compressor liquefied vaporized into the machine, and then the liquefied gas freon out machine, liquid freon via capillary, into the evaporator ( Indoor machine) All of a sudden, space increases, pressure decreases.
the freon liquid will vaporize, become a gas at low temperature of freon, to absorb a lot of heat, the evaporator will become cold, indoor machine of the fan will indoor air blows from the evaporator, so indoor machine out of the cold wind is blowing. Gaseous freon will return to the compressor continues to compression, continue to cycle, freon can recycle.