Jacoby, an American who works in Britain? Perkins' new discovery led to the invention of refrigerator. In 1834, he found that when some liquids evaporate, there will be a cooling effect. Perkins asked a group of technicians to make a working model that could prove the idea.
Sure enough, this device really produced some ice in one night. The mechanics excitedly took the ice cubes, jumped into a carriage and hurried to Perkins' house to show him their achievements. Perkins was old at this time. Although Harrison didn't sell his invention in the market, his work paved the way for early household refrigerators.
The life of an inventor-John, a Scottish printer living in Australia? Harrison. Harrison may have discovered the cooling effect without knowing Perkins' results. He cleaned metal type with ether, and one day he noticed the cooling effect of this substance. By 1862, his first refrigerator was on the market. Harrison also established the first refrigeration workshop in a brewery in Bendigo, Victoria. /kloc-at the end of 0/9, only the rich who build an ice bank can enjoy this benefit. What most people expect is a refrigerator.
At that time, one of the most important uses of refrigerators was on ships. Large cold storage means that ships can carry edible fresh meat on long-distance voyages, such as mutton, which can be exported from New Zealand to Europe.
German engineer Carl? Feng? Linde manufactured the first household refrigerator in 1879. But before the invention of refrigerators in the 1920s, refrigerators did not enter the home on a large scale.
The principle of refrigerator?
Refrigerator uses evaporative cooling or gasification to absorb heat to achieve the purpose of refrigeration. At the throat of the refrigerator, there is a refrigerant called freon commercially, commonly known as snow seed. Commonly used is difluoromethane (CCL2F2), which is a colorless, odorless and nontoxic gas with a boiling point of 29℃. Freon is pressurized by a compressor when it is gaseous. After being pressurized, it flows to the condenser at the back of the refrigerator through the throat, is cooled by the radiator (the temperature of the substance will rise after being compressed), and then condenses into liquid. After the liquid freon enters the valve of the evaporator, it immediately turns into steam because it is out of the pressure of the compressor, and absorbs the latent heat of vaporization from the air and food in the refrigerator, causing the refrigerator to be cold. The vaporized freon is pressed back to the condenser outside the box by the compressor to dissipate heat, and then becomes liquid, so the heat energy in the refrigerator is pumped out of the box.