<P> The first cooling systems for food involved using ice . Artificial refrigeration began in the mid-1750s , and developed in the early 1800s . In 1834 , the first working vapor - compression refrigeration system was built . The first commercial ice - making machine was invented in 1854 . In 1913 , refrigerators for home use were invented . In 1923 Frigidaire introduced the first self - contained unit . The introduction of Freon in the 1920s expanded the refrigerator market during the 1930s . Home freezers as separate compartments ( larger than necessary just for ice cubes ) were introduced in 1940 . Frozen foods , previously a luxury item , became commonplace . </P>
<P> The first cooling systems for food involved using ice . Artificial refrigeration began in the mid-1750s , and developed in the early 1800s . In 1834 , the first working vapor - compression refrigeration system was built . The first commercial ice - making machine was invented in 1854 . In 1913 , refrigerators for home use were invented . In 1923 Frigidaire introduced the first self - contained unit . The introduction of Freon in the 1920s expanded the refrigerator market during the 1930s . Home freezers as separate compartments ( larger than necessary just for ice cubes ) were introduced in 1940 . Frozen foods , previously a luxury item , became commonplace . </P>
when were freezers combined with refrigerators and sold on the market
when were freezers combined with refrigerators and sold on the market
1940
1940