A refrigerator doesn't make cold — it moves heat, which is why the air behind it is warm. This short course follows the refrigerant around its four-stage loop (compressor, condenser, expansion valve, evaporator), explains the pressure-and-boiling trick that lets it absorb heat inside and release it outside, and shows how the same cycle powers your air conditioner and, run backward, a heat pump.
A refrigerator doesn't make cold — it moves heat, which is why the air behind it is warm. This short course follows the refrigerant around its four-stage loop (compressor, condenser, expansion valve, evaporator), explains the pressure-and-boiling trick that lets it absorb heat inside and release it outside, and shows how the same cycle powers your air conditioner and, run backward, a heat pump.
