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it used a block of use to keep food cool inside an insulated box called the ice box. No electricity was required for an ice box.
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An american inventor named Oliver Evans described a closed vapor-compression refrigeration cycle.
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The first working vapor-compression refrigeration system had been built.
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The very first commercial ice-making machine had been invented.
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A self-contained refrigerator, that has a compressor on the bottom of the cabinet was invented by Alfred Mellowes.
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The Kelvinator company introduced the first refrigerator with any type of automatic control. The absorption refrigerator was invented by Baltzar von Platen and Carl Munters from Sweden.
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Home freezers as separate compartments (that were larger than necessary just for ice cubes) were introduced.
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More than 80% of American farms and more than 90% of urban homes had a refrigerator. Focus turned to design with new pastel colors such as turquoise and pink.
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Some More higher efficiency refrigerators had been developed.