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The refrigeration cycle removes heat from one area and relocates it to another. To cool your indoor spaces, your air conditioner’s or heat pump’s refrigerant is pumped through a closed refrigeration system. The same refrigerant is continuously used over and over as it passes through the cycle! With induced pressure changes from the condenser coil, compressor, evaporator coil and the expansion valve, the state of the refrigerant is forced to fluctuate between a liquid and gas. It’s like a teeter-totter on a playground that doesn’t stop: liquid, gas, liquid, gas, etc.! This continuous cycle allows the heat to be transferred from inside your home to the exterior.

Here’s how it works:1


  • The refrigerant comes into the compressor as a low-pressure gas. It is then “compressed” to become a high-pressure gas.
  • The gas then flows through the condenser coil . Here the gas “condenses” to a liquid, and gives off its heat to the outside air.
  • The liquid then moves to the expansion valve under high pressure. This valve restricts the flow of the fluid and lowers its pressure as it leaves the expansion valve.
  • The low-pressure liquid then moves to the evaporator coil, where heat from the inside air is absorbed and changes it from a liquid to a gas.
  • As a hot low-pressure gas, the refrigerant moves to the compressor where the entire cycle is repeated.
 
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