How does a refrigerator keep food cold inside?
The Heat-Mover's Secret
How does a refrigerator keep food cold inside?
Open your fridge and a little wave of cold rolls out to meet you. It feels like the fridge is making cold and pouring it onto your leftovers. But here's the twist: a fridge can't make cold at all. There's no such thing as cold to make. There is only heat — and a clever machine whose whole job is to pick that heat up and carry it somewhere else.
Think of "cold" as just "not much heat around." Warming something up means pouring heat in. Cooling something down means hauling heat out. So a fridge isn't a cold-maker. It's a heat-mover. It grabs the warmth hiding in your milk and your strawberries and quietly evicts it out the back.
