How Refrigerators Work

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how refrigerators work” – work on the principle of cooling through evaporation. Already you know that gases heat up when you compress it and cool down when you allow them to expand. The tendency of gases to heat up when it is compressed and cools when it expands helps the refrigerator to cool the stuff inside it.

The refrigerator is one of the great inventions in living life. It has changed the way of living. Now everyone can preserve food for several days.

The cold temperature in the fridge slows down the growth of bacteria in food and keeps food safe for a long time.

The refrigerator has several components that control the overall process to keep foods cool inside it.

Please find below all the details- 

Components of Refrigerator

1.Fluid Refrigerant

Commonly known as coolant, it is the liquid that keeps the refrigeration cycle running. 

The refrigerant absorbs heat from foods. The refrigerant transfers the absorbed heat to a relatively cold environment outside. Today’s modern refrigerators generally use the gas HFC-134a (Tetrafluoroethane) as a refrigerant.

2.Condenser Coil

As the name suggests, it is a group of tubes formed in the form of coils with external fins, commonly called the heat exchanger of the refrigerator. It is located below or behind the refrigerator.

The main function of the condenser coil is transferring the heat from one medium to another.

parts of fridge


The compressor is located behind and below the refrigerator. It is usually black and looks like a tank. It’s a pump that’s driven by a motor and move refrigerants through the system.


The evaporator coil of a refrigerator is part of the refrigeration cycle.

It has fins with a coiled tube and made with high thermally conductive material. Here Refrigerant is converted from liquid to vapor.

This process is called evaporation. The equipment which does this activity is called evaporator.

5.Expansion Valve

The expansion valve is a very small device. It is also called a TEV, TXV or TX valve and is sensitive to the temperature change of the refrigerant. It controls the amount of refrigerant released into the evaporator.

How Does a Refrigerator Work?

In the “How Refrigerators work” (refrigerator working), the compressor plays an important role. It works in conjunction with Condenser, Evaporator and Expansion Valve.

The compressor starts working when the temperature sensor shows the internal temperature has increased above from a set temperature.

The compressor controls the refrigerant vapor, compresses it to increase its pressure and pushes it out of the fridge to the coils. As it’s compressed, the gas heats up.

The hot gas passes through the coils located behind the fridge. It starts losing its heat into the room. Now it starts to turn into a liquid

Now in high-pressure liquid form, the refrigerant cools as it flows through the expansion valve into the evaporator coil within the freezer and refrigerator.

The refrigerant absorbs the heat within the refrigerator when it flows through the evaporator, and therefore, cooling the air inside the fridge. It rapidly begins to cool all parts of the refrigerator.

Finally, the refrigerant evaporates into the gas due to the raised temperature and then flows back to the compressor.

The compressor sucks up the cooled gas and starts pressuring it again, heating the gas once more, where the cycle begins again.

Now I hope that by this article you will have understood “how refrigerators work

Refrigerators are one amongst the foremost used appliance within the home. Correct maintenance may also help minimize wear and tear to the appliance and help you avoid refrigerator problems, which can increase its lifetime. you pl go through 

  1. 7 Tips to Improve the Efficiency of the refrigerator 
  2. Efficiency of Refrigerator

to improve the efficiency and can cut unwanted bill.