Refrigerators Are Classified According To The Cooling Air Method

Gas compression refrigerator: It is a refrigerator that relies on low boiling point liquid refrigerant (such as Freon R12) to absorb heat when vaporized to achieve the purpose of cooling, and then evaporates and compresses it with a compressor, and then releases heat to liquefy, thereby completing the refrigeration cycle . Because the theory and production technology of this kind of refrigerator are relatively mature in terms of technology and have a long service life, more than 90% of the refrigerators currently produced in China are of this kind.

Gas absorption refrigerator: It is powered by a heat source, ammonia is commonly used as a refrigerant, and hydrogen, which can cause liquid ammonia to evaporate, is used as a diffusing agent. It uses a mixed solution of ammonia, water and hydrogen to complete a continuous "absorption-diffusion" refrigerator . Because there is no operating machinery, it is noiseless, simple in structure, low in cost, not easy to damage, and has a long service life. Various heat sources such as electricity, natural gas, kerosene lamp and solar energy can be used to make it work.

Semiconductor refrigerator: It uses semiconductor materials to produce the Perrzan effect to work, that is, P-type semiconductors and N-type semiconductors are used to make galvanic couples. After the direct current is connected, heat generation and endothermic phenomena are generated at the nodes, thereby To achieve the purpose of refrigeration. Compared with mechanical refrigeration, semiconductor refrigeration has the characteristics of small size, light weight, no noise, no vibration, no wear, long life, convenient cooling rate adjustment, and no pollution. However, due to the high price, it is not widely used.