when were freezers combined with refrigerators and sold on the market
Refrigerator 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.
7-Eleven In 1927, Southland Ice Company employee John Jefferson Green began selling eggs, milk, and bread from one of 16 ice house storefronts in Dallas, with permission from one of Southland's founding directors, Joe C. Thompson, Sr.[7] Although small grocery stores and general merchandisers were available, Thompson theorized that selling products such as bread and milk in convenience stores would reduce the need for customers to travel long distances for basic items. He eventually bought the Southland Ice Company and turned it into Southland Corporation, which oversaw several locations in the Dallas area.[4]