How long does the refrigerator call the police after defrosting?

After the refrigerator thaws, the alarm clock will ring for ten minutes.

Historical origin

Humans have long known that food stored at low temperature is not easy to rot. As early as 2000 BC (20th century BC), the ancient inhabitants of the Euphrates and Tigris rivers in Babylonia, West Asia, began to build ice cubes in pits to refrigerate meat.

In Shang dynasty (BC17th century, BC 1 1 century), China also knew how to keep food in ice. In the Middle Ages, many countries had primitive refrigerators, and put ice cubes in special water cabinets or stone cabinets to preserve food. Until the 65438+1950s, this kind of refrigerator was still sold in America.

The word "refrigerator" entered the American language in the middle of17th century. 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. By 1880, half of refrigerators sold in new york, Philadelphia and Baltimore, and one third of refrigerators sold in Boston and Chicago began to enter the home. Similar products include freezers.