Abstract: Artificial refrigeration technology has a his […]
Abstract: Artificial refrigeration technology has a history of more than two hundred years. It is developed by people's constant demand for “ice cold”. In some developed countries, the use rate of refrigerators has reached more than 99%.
More than a thousand years ago, there were already artificial refrigeration technologies in ancient China. It has been more than two hundred years old and it has been developed by people's constant demand for “cold cold”. In some developed countries, the use rate of refrigerators has reached 99. %the above.
As early as more than a thousand years ago, there were already written records of ice in ancient China. Qin Shihuang used the method of placing ice cubes in copper scorpions to cool down the heatstroke. In the Tang Dynasty, there was a special department responsible for collecting ice in winter. The crypt is reserved for summer preservation and summer heat.
In 1755, British teacher Coulomb used ether evaporation to make water freeze. This is the first time human history has used artificial refrigeration technology. The discovery of ether cooling marks the beginning of modern refrigeration technology. In 1834, the French scientist Peltier discovered the "Peltier cooling effect", using the heat transfer between the closed lines to cool, which was an early refrigeration device, but because the electronic technology was not mature at the time, the cooling effect was not satisfactory, so Electronic refrigeration technology has not been practically applied.
Until the modernization of semiconductor technology in modern times, the electronic refrigeration technology using the Peltier effect has been widely used. The improved semiconductor refrigerator has been widely used in industrial and electronic products, especially semiconductor semiconductor refrigerators. Colder.
Also in 1834, American inventor Jacob Perkins invented a steam pressure pump freezer using ether refrigerant and applied for a British patent, which was an early refrigerator.
In the next hundred years, the refrigeration technology has been continuously updated, the pressure pump has become a more efficient closed compressor, and the refrigerant has begun to use safer and more environmentally friendly isobutane, which not only saves energy but also destroys the ozone layer. . In recent years, with the improvement of people's living standards, high-efficiency and energy-saving compressor refrigeration technology has been widely used in commercial, industrial and agricultural, construction, medical and other fields.