1873, German chemist and engineer Karl von Linde invented a refrigerator with ammonia as refrigerant. Linde uses a small steam engine to drive the compression system, so that ammonia can be repeatedly compressed and evaporated to produce refrigeration. Later, he improved the industrial refrigerator. Miniaturizing it, the world's first domestic refrigerator with artificial refrigeration was made in 1879.
The world's first refrigerator driven by motor and compressor was born in 1923. It was invented by Swedish engineers Balzar von Prandin and Carl Monte, and is called the first refrigerator in the world. Who would have thought that the refrigerator that has brought great changes to our lives is just the homework of two young students.
Later, they sold the patent to an American company and produced the first batch of household refrigerators in 1925.
In the past, the handle of the refrigerator was designed as a latch. When the door lock is locked, the rubber strip washer can be pressed tightly, so that cold air is completely sealed in the refrigerator and warm air cannot enter. Later, the US Congress passed the refrigerator safety law in 1956, and all refrigerators were equipped with switch handles. But not long after, a wise man thought of replacing the refrigerator door bolt with a magnet seal, so the modern version of the refrigerator appeared.
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/kloc-in the middle of the 0/7th century, the word "refrigerator" entered the American language. Before that, refrigerators 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.
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