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Why are freezer on top of fridge?

Updated: 2/28/2022
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8y ago

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One possible reason is because of the size of the freezer compared to the size of the refrigerator portion. If the refrigerator portion were placed over the freezer, then you would have to kneel down to use the freezer.

Another part of it could pertain to convection. Cold air tends to circulate down. So with the right amount of gap between the freezer portion and the rest, just enough cold air can flow down to cool the refrigerator. So the evaporator coils are only in the freezer and yet can cool the entire unit. If the evaporator coils were on the bottom, then only the lower portion of the refrigerator would be cool since heat rises, and some of the cavity space would be wasted. So for simplicity and efficiency, the coils are placed on top and that this area is made the freezer.

So they cool only the freezer and have a small opening to let the cold air come down (or warm air to come up to be more accurate) to reach the 34-38 degrees Fahrenheit needed for the refrigerator. Sometimes there is an adjustable damper there. The thermostat is just for the refrigerator in most cases, since if the refrigerator is within proper range, the freezer would be too, all because of the design. On those with a control for the freezer, that control generally moves a little damper (door). So the colder you set the freezer, the harder you are making the refrigerator portion to cool. Since the actual thermostat is located in the refrigerator section, the longer the compressor must run to make that compartment the proper temperature when you close the damper (by setting the freezer control colder).

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Christophe Greenfeld...

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