Refrigerator pickles apple cider vinegar

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On this Wikipedia the language links are at the top of the page across from the article title. The first cooling systems for food involved 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. Freezer units are used in households as well as in industry and commerce. Commercial refrigerator and freezer units were in use for almost 40 years prior to the common home models. The freezer-over-refrigerator style had been the basic style since the 1940s, until modern, side-by-side refrigerators broke the trend. Domestic refrigerators and freezers for food storage are made in a range of sizes.

Among the smallest are Peltier-type refrigerators designed to chill beverages. Refrigerators and freezers may be free-standing, or built into a kitchen. The refrigerator allows the modern household to keep food fresh for longer than before. In modern times, before the invention of the modern electric refrigerator, icehouses and iceboxes were used to provide cool storage for most of the year. Placed near freshwater lakes or packed with snow and ice during the winter, they were once very common.

Natural means are still used to cool foods today. The history of artificial refrigeration began when Scottish professor William Cullen designed a small refrigerating machine in 1755. In 1805, American inventor Oliver Evans described a closed vapor-compression refrigeration cycle for the production of ice by ether under vacuum. The first practical vapor compression refrigeration system was built by James Harrison, a Scottish Australian.

His 1856 patent was for a vapor compression system using ether, alcohol or ammonia. Ferdinand Carré of France in 1859 and patented in 1860. Carl von Linde, an engineering professor at the Technological University Munich in Germany, patented an improved method of liquefying gases in 1876. Its electric compressors were manufactured by the Ganz Works.