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How do a cooler know how to keep hot food hot and cold food cold?
Wiki User
∙ 11y ago
Coolers are equipped with a very elegant temperature regulation mechanism. A thermocouple implanted in the cooler insulation detects temperature gradients between the interior and exterior surfaces of the cooler. If the initial gradient is measured to be rising in temperature toward the center of the cooler, the cooler insulation automatically orients itself to reflect heat back toward the center of the cooler, thereby keeping the contents warm.
Conversely, if the temperature gradient detects that the contents of the cooler are cold, the insulation reverses its orientation to deflect exterior heat and preserve the colder temperatures on the inside of the cooler.
All of this is accomplished through the use of a non-newtonian polymer embedded with thermo-sensitive alloys which alter their magnetic polarity to align with termperature gradients. As the temperature gradient changes so does the magnetic polarity which alters the insulation alignment in the appropriate direction.
A competing theory is that coolers do not "know" to keep food hot or cold, rather they are insulated and there-by stablilize the temperature and prevent it from changing. If you place hot items in an insulated container they will stay hot, cold items will stay cold.
Wiki User
∙ 11y ago
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