Which is more suitable for household refrigerators, two doors or four doors?

It must be that the capacity of the two doors is larger and the atmosphere is higher, which saves electricity than the four doors.

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. 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 thermoelectric refrigerators began to be produced in the second half of 1950s, and refrigerators began to be produced in China in 1950s.

/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.

Making an efficient refrigerator is not as simple as we thought. /kloc-At the beginning of the 9th century, inventors had a superficial understanding of thermophysics, which was very important for refrigeration science. People think that the best refrigerator should prevent the melting of ice, but at that time, such a very common view was obviously wrong, because it was the melting of ice that played the role of refrigeration. In the early days, people made a lot of efforts to preserve ice, including wrapping it with blankets, so that ice could not play its role. It was not until the end of 19 that the inventor successfully found the exact balance between heat insulation and circulation required for efficient refrigerators.

But as early as 1800, Thomas Moore, a Maryland farmer with a gift for invention, found the right method. He owns a farm about 20 miles from Washington, where Georgetown Village is the center of the market. When he used his refrigerator to transport butter to the market, he found that customers would walk past the rapidly melting butter in competitors' barrels and buy him butter that was still fresh and hard and neatly cut into pounds at a price higher than the market price. Moore said that one advantage of his refrigerator is that farmers don't have to go to the market to refrigerate their products at night.