Refrigerator or freezer or cool box [1] is an electrical household appliance that uses refrigeration (cooling process) to help food preservation. Approximately 99.5% of homes in the United States has a refrigerator. He works using a heat pump operates in a phase modifier refrigeration cycle. Industrial refrigerator is a refrigerator that is used for industrial needs, such as in restaurants or supermarkets.
They can consist of a refrigerator or freezer or both. Two cabinet system was first introduced by General Electric in 1939. Some refrigerators are now divided into four rooms for storage of different food types:
-18 ° C (0 ° F) (freezer)
0 ° C (32 ° F) (meats)
4 ° C (40 ° F) (cooling)
10 ° C (50 ° F) (vegetables), to put different types of food.
The capacity of a refrigerator is measured in liters. Usually the content of freezing is 100 liters and 140 liters of coolant (but can vary widely).
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