History: In what year was the refrigerator invented and through it the preservation of food
A refrigerator (colloquially a fridge or freezer) is a popular household appliance for artificially cooling food and beverages. It has a heat-insulated compartment and a heat pump (mechanical, electrical or chemical) that expels heat from the inside of the refrigerator, so the temperature inside the refrigerator is much lower than the temperature of the surrounding environment. In the developed world food preservation is inevitably refrigerated. At lower temperatures, bacteria breed less and spread less,That is why food does not rot easily.
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The temperature inside the refrigerator is slightly above the melting point. The optimum temperature for preserving perishable food is 3 to 5 ° C (36 to 41 ° F). Iceboxes have been used to store food in homes for almost a century and a half. That's why refrigerators are sometimes called ice boxes in America.
Ice was used in the first method of freezing food. Artificial refrigeration began in the mid-1850s, and was further developed in the early 1800s. In 1834, the first effective water vapor-compression refrigerator system was developed. The first commercial ice making mill was invented in 1854. In 1913, a home-made refrigerator was made. In 1923, the Fridgeader Company built the first self-contained single refrigerator.
After the discovery of Freon in the 1920s, the refrigerator market expanded in the 1930s. Home freezers came in the 40's, with separate compartments larger than necessary to hold ice cubes. Before the advent of the refrigerator, frozen food was a luxury, but now it is out of reach.
Freezer units are used in households, industries and businesses. Commercial refrigerator and freezer units have been used for households for more than 40 years.
Most homes use a top-freezer-and-bottom-refrigerator-style model that dates back to the 1940s. Water vapor compression cycles are used in most household refrigerators, refrigerator-freezers and freezers. Newer refrigerators may have an auto defrosting system or a refrigerator with a cold water and ice dispenser.
Refrigerators and freezers used for storing food at home can be of different sizes.The smallest models have a 4 liter Peltier refrigerator that can hold 8 cans of beer. Larger refrigerators, meanwhile, can be as tall as a human head, up to 1 meter wide, and have a capacity of 600 liters.
Refrigerators and freezers can be permanently installed in the kitchen, but can also be mobile. Due to the refrigerator, food is being stored fresher in modern times than before. As a result, people are able to buy a lot of food at once, and that is economically viable.