Working Principle of a Refrigerator with Diagram in English and Hindi

The refrigerator has evolved into an essential component of modern life. These necessary devices let us to keep perishable goods like food, drinks, and other foods at low temperatures for extended periods of time, maintaining their freshness. But have you ever considered the mechanism behind a refrigerator? This essay will explain the science behind this amazing technology and explore the interesting workings of a refrigerator.

Basics Components of Refrigerator

Before diving into the intricacies of how a refrigerator work, let’s start by understanding a few fundamental concept. Heat transfer, evaporation, and compression are the key principle involved in the refrigeration process.

We must first examine a refrigerator’s fundamental parts in order to comprehend how it operates. These consist of,

  • Compressor: The refrigerant gas is compressed at this crucial stage of the refrigeration cycle.
  • Condenser: The condenser is where the hot, compressed gas goes to discharge its heat into the surrounding air or water.
  • Expansion Valve: This valve reduces the pressure of the refrigerant, causing it to cool down and turn into a gas.
  • Evaporator: The cool gas then enters the evaporator, where it absorbs heat from the surrounding air or water, causing it to cool down.

Working of a Refrigeration Cycle

Understanding the refrigeration cycle is essential to comprehend how a refrigerator operates. This cycle consist of four main stages:- compressions, condensation, expansion, and evaporation.

Compression Stage

In this initial stage, the compressor compresses the low-pressure refrigerant vapor, raising its temperature and pressure.

Condensation Stage

The refrigerant, now at a high pressure and temperature, enters the condenser coils, where it releases heat to the surrounding environment. As a result, the refrigerant turn into a high-pressure liquid.

Expansion Stage

Next, the high-pressure liquid refrigerants flows through the expansion valve, which restricts its flow, causing a drop in pressure.

Evaporation Stage

The low-pressure refrigerant, after passing through the expansion valve, enters the evaporator coil. In this stage, the refrigerant evaporate, absorbing heat from the surrounding environment and cooling the interior of the refrigerator.

Achieving Lower Temperatures

To achieve lower temperature in the refrigerator, a continuous cycle of evaporation and condensation takes place. The evaporator coil inside the refrigerator absorbs heat from the items stored inside, while the condenser coil releases heat to the external environment.


The concepts of heat transmission, evaporation, and compression provide the foundation for how a refrigerator functions. These ideas enable refrigerators to produce and sustain low temperatures, enabling us to efficiently preserve our food and beverages. Understanding how this important household appliance functions not only broadens our knowledge but also highlights the huge scientific developments that have fundamentally changed how we live our lives.

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