If you have read How Food Preservation Works, then you know that the purpose of a refrigerator is to slow down the growth of bacteria. The purpose of a freezer is to stop bacteria completely by freezing them solid. We would freeze everything if we could, but some foods change dramatically when you freeze them -- lettuce, strawberries, milk and eggs are just a few of the foods that don't freeze well. It would also be inconvenient to thaw liquids every time you wanted to drink something.
Therefore, you want your refrigerator to be cold, but not so cold that it freezes things. The preferred temperature is somewhere between 35 and 38 degrees F (1.7 to 3.3 degrees C). Anything higher and foods will spoil too quickly (it also presents food poisoning problems, as described in several of the links below). Anything lower and freezing becomes a problem.
To learn more about refrigerators, check out the links below.
Related HowStuffWorks Articles
- Electric Motor Quiz
- How Air Conditioners Work
- How Icemakers Work
- How Food Preservation Works
- How Car Cooling Systems Work
- Why is the back of a refrigerator painted black?
- What is the function of the fan in a refrigerator?
- How does a frost-free refrigerator work?
- How can I tell if the light in my refrigerator goes off or not when I close the door?
- How does a water-cooled air conditioner work?
- When buying gas appliances, why do you always have to specify whether you are using LPG or natural gas?
More Great Links
