How Does A Fridge Work

How Does a Fridge Work

A fridge is a common household appliance that is used to keep food and drinks cold. But have you ever wondered how does a fridge work? In this article, we will take a look at the inner workings of a fridge and understand the science behind it.

The Basics of Refrigeration

Before we dive into how does a fridge work, it is important to understand the basics of refrigeration. The process of refrigeration involves the removal of heat from a space or substance to lower its temperature. This is achieved by using a refrigerant, a substance that can absorb and release heat.

Now, let’s see how this process is used in a fridge to keep our food fresh.

The Components of a Fridge

A fridge has several components that work together to keep the inside cool. These include:

  • Compressor
  • Condenser
  • Evaporator
  • Expansion valve

Each of these components plays a vital role in the refrigeration process and ensures that the fridge works efficiently.

How Does a Fridge Work?

Now that we have an idea of the components of a fridge, let’s see how does a fridge work:

  1. The compressor compresses the refrigerant gas, which increases its temperature and pressure.
  2. The hot refrigerant gas then enters the condenser, where it releases its heat to the surrounding air and turns into a liquid.
  3. The liquid refrigerant then flows through the expansion valve, which reduces its pressure and temperature.
  4. The cold refrigerant then enters the evaporator, where it absorbs heat from the inside of the fridge and turns back into a gas.
  5. The gas refrigerant then flows back to the compressor, and the cycle starts again.

FAQs about How Does a Fridge Work

Q: How does a fridge keep the inside cool?

A: A fridge keeps the inside cool by removing heat from the air inside and releasing it outside. This is done by the refrigeration process we discussed earlier.

Q: What is the purpose of the compressor in a fridge?

A: The compressor is responsible for compressing the refrigerant gas, which increases its temperature and pressure. This is the first step in the refrigeration process.

Q: How does the evaporator work in a fridge?

A: The evaporator is responsible for absorbing heat from the inside of the fridge and turning the refrigerant into a gas. This gas is then sent back to the compressor to start the cycle again.


So, that’s how does a fridge work. From compressors to evaporators, every component plays an important role in keeping our food fresh and drinks cold. Understanding the science behind the refrigeration process can help us appreciate the technology that we use in our daily lives.