Something which I am interested in..!!!

Refrigerators and water dispensers, these are something which we use in our day to day lives, if not water dispensers but yes refrigerators are something which we use in our day to day lives. So, have you ever thought about how to Refrigerators work? How do they cool the air? So let me tell you about how they cool the air inside.

So firstly, have you ever seen the back side of your refrigerator, when you see the back side there is a net like thing wrapped around, what is that? Is it to protect the refrigerator? No, that is called a Condenser, also there is a black thing placed inside, that is the Compressor, it is the heart of the refrigerator it pumps air instead of blood. So firstly a Refrigerant Gas is gone in the Heart of the machine, the compressor. The compressor compresses the air, makes it thin and vapourizers it. Then through pipes the air goes in the Condenser, the net like thing the refrigerant gas travels around the condenser which makes the air cooler, then the air from a broad pipe moves to a thin pipe, due to to transfer from a broad pipe to a thin one the air flows in a force just like a normal water pipe, when we put hand in front of the the mouth of the pipe the force of the water increases and it moves faster. The same thing happens in this case, as the pipe size gets smaller the force of the refrigerant gas increases, hence the air gets cooler then the cool air revolves around the refrigerator and cools the inside of it.

Image of a compressor                     Image of condenser

Now you must be thinking that the cool air must be going out of the refrigerator and the refrigerator’s temperature would be normal again. If you see the refrigerator’s border, it is thick so why is it thick? Is the material used to make the border thick? No, the material used to make the border isn’t so thick, to prevent the cool air from going outside and to prevent the heated air to move in the fridge there is a material used called as polystyrene foam, this material is a good thermal insulator, it prevents the heat transfer , hence the cool air is trapped inside the refrigerator for a long duration.

So now I hope you have got some glimpse about how a refrigerator works.