Refrigerators occupy space in kitchens everywhere, keeping food fresh through an ongoing internal process.
Inside every refrigerator, the cooling cycle operates continuously to maintain a steady low temperature. A sensor tracks the air temperature moment by moment.
When the temperature climbs slightly above the target level, an electric pump begins moving a special fluid through thin tubes lined along the walls and shelves. This fluid draws warmth from the air inside.
A small fan then spreads the chilled air throughout the space. The pump continues until the temperature drops back to the target. It then stops, only to restart when warmth seeps in again from the surrounding room.
This cycle of sensing, pumping, fanning, and pausing repeats without end, day and night.
The process runs independently, whether the door stays closed or opens occasionally. Refrigerators sustain their chilled environment through unrelenting background operation.
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