how does a refrigerator works?

Answer 1

the principle of refridgerator is as follows
Modern refrigerators don't use CFC. Instead they use ammonia gas. Ammonia gas turns into a liquid when it is cooled to -27 degrees Fahrenheit (-6.5 degrees Celsius).

A motor and compressor squeezes the ammonia gas. When it is compressed, a gas heats up as it is pressurized. When you pass the compressed gas through the coils on the back or bottom of a modern refrigerator, the hot ammonia gas can lose its heat to the air in the room.

Remember the law of thermodynamics.

As it cools, the ammonia gas can change into ammonia liquid because it is under a high pressure.

The ammonia liquid flows through what's called an expansion valve, a tiny small hole that the liquid has to squeeze through. Between the valve and the compressor, there is a low-pressure area because the compressor is pulling the ammonia gas out of that side.

When the liquid ammonia hits a low pressure area it boils and changes into a gas. This is called vaporizing.

The coils then go through the freezer and regular part of the refrigerator where the colder ammonia in the coil pulls the heat out of the compartments. This makes the inside of the freezer and entire refrigerator cold.

The compressor sucks up the cold ammonia gas, and the gas goes back through the same process over and over.
A device called a thermocouple (it's basically a thermometer) can sense when the temperature in the refrigerator is as cold as you want it to be. When it reaches that temperature, the device shuts off the electricity to the compressor.

But the refrigerator is not completely sealed. There are places, like around the doors and where the pipes go through, that can leak a little bit.

So when the cold from inside the refrigerator starts to leak out and the heat leaks in, the thermocouple turns the compressor back on to cool the refrigerator off again.

That's why you'll hear your refrigerator compressor motor coming on, running for a little while and then turning itself off.

Today's refrigerators, however, are very energy efficient. Ones sold today use about one-tenth the amount of electricity of ones that were built 20 years ago. So, if you have an old, old refrigerator, it's better to buy a new one because you'll save money (and energy) over a long period of time.

Answer 2

a refridgerator basically works by maintaining the temperature inside the chanber at a constant, lower than the temp out side the fridge. The methods of extraction of heat from the interior vary with different models of refridgerators.

Answer 3

it has a compressor which then goes into a liquide line then the liquide turns into a gas and gets pushed out under high pressure into a condenser. which then pushes out cold air

Answer 4

takes heat away from its interior, releases it in the outside world. Via cycle of compressing / decompressing a gas (you may have noticed that rapid decompression of a gas causes a drop in temperature, for example if you use a spray over the back of your hand).

Answer 5

it compresses gas and cools it (its that grill in the back, sometimes covered on new models)

then it lets the gas expand. When the gas expands it absorbs heat.

It them compresses the gas and cools it with air at the back of the frig.

Answer 6

it runs

Answer 7

sorry i dont know