FREEZER

                  

Apparatus independent or integrated in a refrigerator, capable of freezing food, as weel as producing ice.

Freezers do not really work by cooling things down, but they take away the heat. They use an evaporation process to remove the heat and leave the food frozen. To carry it out, some very special components are used.

A freezer works by removing heat from the compartment. To begin with the process, the refrigerant, which acts as a gas, goes inside the compressor, where all the compression causes in to overheat. The hot gas moves through other coils ans begins to cool, which causes the gas to become liquid. While continuing in this form, it is sent to an expansion valve, which has a very small opening through which the coolant passes and where it becomes a very cold haze. As the steam passes through the compartment, is begins to evaporate and returns to the gas. The temperature of the fog at this altitude is around -27 degrees Fahrenheit (-33 degrees Celsius) and carries heat from the compartent along with it. The refrigerant begins to heat up again when it is removed from the heat and is returned to the compresssor to start the process again. Each time the coolant renews the cycle, it removes more heat from the compartment until it is no longer present. This is what causes the food to freeze.

Freezer types:

1.Vertical freezer.

  

2.Small freezer

 

 

3.Industrial freezer