What does the switch in the refrigerator do?

There are three switches in the refrigerator, namely, the temperature control switch, the compensation switch and the lighting switch. The temperature control switch is used to adjust and set the refrigeration temperature. Compensation switch, when the indoor temperature is too low and the refrigerator doesn't start food melting, turn on this switch to make the thermostat start normally. Refrigerated lighting switch, with the opening of the door, the lighting automatically turns on and off.

Refrigerator is a kind of refrigeration equipment to keep a constant low temperature, and it is also a civilian product to keep food or other items at a constant low temperature. There are compressors, ice makers, cabinets or boxes for refrigeration, and there are storage boxes with refrigeration devices in the boxes. The volume of domestic refrigerators is usually 20 ~ 500 liters. Users should clean and disinfect the refrigerator regularly when using it, which is not only sanitary and clean, but also can prolong the service life of the refrigerator.

19 10 the world's first compressed refrigeration household refrigerator came out in the United States. 1925 Lido Company of Sweden has developed a household absorption refrigerator. 1927 the general electric company of the United States has developed a fully enclosed refrigerator. 1930, air-cooled continuous diffusion absorption refrigerators with different heating methods were put on the market. 193 1 year, a new refrigerant freon 12 was successfully developed. Domestic refrigerators began to be produced in the second half of 1950s, and refrigerators began to be produced in China in 1950s.

Humans have long known that food stored at low temperature is not easy to rot. Over 2000 BC, the ancient inhabitants of the Euphrates River and Tigris River basins in ancient Babylonia, West Asia, began to build ice cubes in pits to refrigerate meat. China also knew how to refrigerate and preserve food with ice cubes in Shang Dynasty. In the Middle Ages, many countries had primitive refrigerators, and put ice cubes in special water cabinets or stone cabinets to preserve food.

/kloc-in the middle of the 0/7th century, the word "refrigerator" entered the American language. Before that, refrigerators initially only affected the diet of ordinary Americans. With the development of the city, the sales of methamphetamine have gradually developed. It is gradually used by hotels, hotels, hospitals and some discerning city businessmen to keep meat, fish and butter fresh. After the civil war (186 1- 1865), ice was used to refrigerate freight cars and also entered civil use. Before 1880, half of refrigerators sold in new york, Philadelphia and Baltimore, and one third in Boston and Chicago began to be used at home, because a new household equipment-refrigerator, the predecessor of modern refrigerator, was invented. Similar products include freezers.