RFQ on refrigerator you should know

June 4, 2014

Each home have a refrigerator, of course each one use refrigerator everyday. But maybe you have any time to read below to enrich the mind. Kindly read below: 



1. How does a refrigerator work?
A refrigerator essentially works because of the properties of compressed gas. The compressor compresses the refrigerant gas which raises the pressure of the chemical refrigerant. It also raises the temperature. The heat exchanging coil that sits on the outside the refrigerator the allows the refrigerant to dissipate this excess heat caused by the pressurization which is why you feel heat coming from from the vent.
As the refrigerant cools, it condenses into a liquid. The liquid then flows into an expansion valve which allows it to move from high pressure to low pressure zone. This process forces it to expand and evaporate and in the same way that sweat keeps us cool in the summers, as the refrigerant evaporates, it absorbs heat which makes it cold.
There are inside the refrigerator which allow the refrigerant to absorb heat. This absorption process makes the inside of the refrigerator very cold. This cycle will repeat time and time again until the desired temperature (set by the user) is reached.
2. What is a refrigerator's ideal temperature?
The answer to this Refrigerator FAQ is that a refrigerator's purpose is to keep certain foods fresh by keeping them cold. A refrigerator extends the life of meats, dairy and produce for a few days or weeks. A refrigerator should be cold but not too cold or else it could potentially freeze the contents. The ideal temperature for most residential use refrigerators is between 1 to 4 degrees Celsius.
3. Why does frost form in a refrigerator ?
This is a very common refrigerator FAQ because so many of us have this problem. The reason why it happens is due to water vapor hitting cold coils and then frost forms. Just like the steam from your breath on a cold window, the water vapor condenses and turns into water. As the water condenses onto the coils, it freezes and thus forms a layer of frost.
4. How does a frost-free refrigerator work ?
With the exception of a number of compact refrigerator models, most of today's refrigerator models are frost-free. There are essentially three basic parts:
The Timer 
The Temperature Sensor 
The Heating Coil
A timer is set to turn on the heating coil at varying intervals. The heating coil is wrapped among the freezer coils and as it turns on, it melts the ice off the freezer coils. As the ice is removed, the temperature sensor will sense that the temperature has risen above 32 degrees Fahrenheit. At that point it will send out a signal which turns off the heater.