How Does a Refrigerator Work

How Does a Refrigerator Work

In this post, we will explain How Does a Refrigerator Work. In the refrigeration cycle, there are five basic components: fluid refrigerant; a compressor, which controls the flow of refrigerant; the condenser coils (on the outside of the fridge); the evaporator coils (on the inside of the fridge); and something called an expansion device. Here’s how they interact to cool your food.

How Does a Refrigerator Work Steps


  • The compressor constricts the refrigerant vapor, raising its pressure, and pushes it into the coils on the outside of the refrigerator.
  • When the hot gas in the coils meets the cooler air temperature of the kitchen, it becomes a liquid.
  • Now in liquid form at high pressure, the refrigerant cools down as it flows into the coils inside the freezer and the fridge.
  • The refrigerant absorbs the heat inside the fridge, cooling down the air.
  • Last, the refrigerant evaporates to a gas, then flows back to the compressor, where the cycle starts all over.

Although there were techniques that people used in ancient times to get their fill of cold water, they were certainly not as easy as opening a door at home and taking out a bottle of ice-cold water. Even if they could get cold water to drink, they certainly didn’t have anything that could make their food stay fresh for days or even weeks on end.

A refrigerator is, basically, a heat engine in which work is done on a refrigerant substance so it could collect energy from a cold region; deliver it in a higher temperature region and with that cooling the cold region even more.

Basic elements of a refrigerator Refrigerator are compressor which is connected to the outer, hotter, pipe system (called condenser coils) that is connected to the expansion valve which is connected to the inner, colder, pipe system (evaporator coils) which is connected back to the compressor.


They all hold refrigerant substance and evaporator coils are placed in a thermally isolated ”box” whose role is to keep its inside cold.

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