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History, classification and principle of refrigerators


There are still many differences between chillers and chillers , and some of the history of chillers mainly includes the 1850s. The French Carré brothers have successfully developed absorption chiller and ammonia absorption chiller with sulfuric acid and water as working fluids. Refrigerator. In 1910, a steam jet refrigerator was introduced. The Freon refrigerant appeared in 1930, which promoted the rapid development of compression refrigerators. In 1945, the United States successfully developed a silver bromide absorption refrigerator.

According to the working principle, refrigerators can be divided into: ① compression refrigerators. Relying on the role of the compressor to increase the pressure of the refrigerant to achieve the refrigeration cycle, according to the type of refrigerant can be divided into vapor compression refrigerators (based on hydraulic evaporation refrigeration, the refrigerant undergoes periodic gas-liquid phase change) Gas compression refrigerator (based on high-pressure gas expansion refrigeration, the refrigerant is always in a gas state). ② Absorption refrigerator. Relying on the role of the absorber-generator set (thermochemical compressor) to complete the refrigeration cycle, it can be divided into three types: ammonia absorption type, lithium bromide absorption type and absorption diffusion type. ③Steam jet refrigerator. The refrigeration cycle is completed by the action of a steam ejector (jet compressor). ④ Semiconductor refrigerator. The thermal-electric effect of the semiconductor is used to obtain the cooling capacity.

The main performance indicators of refrigerators are working temperature (evaporation and condensation temperatures for vapor compression refrigerators, temperature of objects to be cooled and temperature of cooling medium for gas compression refrigerators and semiconductor refrigerators), and refrigeration capacity (refrigeration The heat removed from the object to be cooled per unit time), power or heat consumption, refrigeration coefficient (an indicator to measure the economic efficiency of a compression refrigerator, which refers to the amount of cooling that can be obtained by consuming unit work), and thermal coefficient (a measure of the absorption type) And steam jet refrigerator economic indicators, refers to the amount of cooling can be obtained by consuming unit heat). Modern refrigerators are most widely used with vapor compression refrigerators.

Of course, with the continuous improvement and breakthrough of the industry's technology, in the near future there will be more refrigerators with superior performance. Currently, vapor compression refrigerators are still the main, and Dongguan Guansheng Machinery The same applies to the refrigerator products of the company!



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