Refrigerators, freezers, and air conditioning units plays a vital role in our daily lives. An innovative invention of mankind to give comfort and to reduce human activities. Having a refrigerator or freezer at home reduces the number of our visits to supermarkets. Chilled drinks and frozen foods are at our disposal when needed. A cool and comfortable sleep during summer even at Sahara Desert is possible, thanks to air conditioning units.

Evaporator plays an important role in refrigeration and air conditioning system. It is where the cooling effect takes place. Evaporator is also called heat exchanger since it absorbs the heat that passes through it which literally drop its surrounding temperature.

The basic components of a refrigeration system are as follows: compressor, condenser, condenser fan, drier/filter, capillary tube, evaporator, and accumulator. Evaporators are constructed according to its capacity and application.

Evaporator of domestic refrigerator can be easily identified its location, it is located at the freezer compartment but not visible to our naked eye where ice is accumulated around its surface. Unlike the old days, evaporator is exposed. Our grandparents even our parents used a kitchen knife to remove accumulated ice on its surface to increase storage space and freezing effect which sometimes punched a hole on the evaporator and putting the refrigerator out of order. Some were smart enough by using hot water flushing directly to the evaporator but the disadvantage is that water accumulates on the floor thus exposing oneself to electric shock.