RefrigeratorA commercial and home appliance consists of a thermally insulated compartment and a heat pump (mechanical, electronic, or chemical) that transfers heat from its inside to its external environment so that it's inside is cooled to a temperature below the room temperature. Refrigeration is an essential food storage technique around the world. The lower temperature lowers the reproduction rate of bacteria, so the refrigerator reduces the rate of spoilage. MideaA refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is 3 to 5 °C (37 to 41 °F).[1] A similar device that maintains a temperature below the freezing point of water is called a freezer.
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