The refrigerator is now so taken for granted that we scarcely a moment we can not access the most appropriate form of conservation proposals. But this was the case for most of recorded history, we had to do with simple means to prevent us from becoming food inedible. People dig holes in the ground and the straw or wood and filled with snow and ice when food was placed. Such methods were available were a large part of the story, and then only for those who want access to snow and ice.

In 1550, people had learned to cooling water by adding chemicals such as sodium nitrate and potassium nitrate, and the wine was cool using this approach. In France in the seventeenth century, it was reported that the resolution of nitrate in water temperatures should produce and allow them to make ice. In 1748, William Cullen, University of Glasgow, has produced the method of artificial cooling. Ethyl ether has been cooked to a partial vacuum. Unfortunately Cullen did not pursue this point to produce a cooling unit practice.

Researchers continue to work to improve methods of isolation on the rate of melting of ice in a cooler in autumn, and considerable progress has been made, with losses resulting from the merger is limited to not less than eight percent . Specialists in this field, the Americans Frederick Tudor and Nathaniel Wyeth. They have managed to minimize losses to the point where they could save significant amounts of ice and transportation more efficient.

The first machine that the method used to compress the gas has been designed and manufactured by an American doctor John Gorrie in 1842. His method of compressing a gas cooling and sending the flush water, which has been cooled by expansion. In 1859 the French Ferdinand Carré used ammonia, which is liquid at lower temperatures than water, to further improve the efficiency of refrigeration units for cooling, although not always practical for home use for a number of reasons, including size and cost.

Until 1929, ammonia, methyl chloride and sulfur dioxide have been used as refrigerants, but they were found to be dangerous and there have been several deaths reported due to leakage of methyl chloride. This led to the production of freon, which came to be used as standard in the world for many decades to come, until we discovered that the ozone layer by CFCs damage the Earth. They are replaced by hydrofluorocarbons, which do not cause damage to the ozone layer, but, unfortunately, are still in greenhouse gas emissions.