Industrial chiller transfers heat from a cooled object with a lower temperature to the ambient

medium, thus obtaining cold. The heat transferred from the lower temperature object is custo-

marily referred to as cold. 

Industrial chiller to participate in the thermal process changes (energy conversion and heat

transfer) of the substance called refrigerant. The temperature range of refrigeration is usually

above 120K, and below 120K is the range of deep cryogenic technology.

Industrial chillers are widely used in 

① Compression chillers. 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 vapour Compression chiller (based on hydraulic evaporation refrigeration, the refrigerant

should be cyclical gas-liquid phase change) and gas compression refrigeration (high pressure

gas expansion refrigeration based on the refrigerant is always in the state of the gas) two kinds

of modern refrigeration to vapour compression refrigeration is the most widely used. 

② absorption chiller. Relying on the absorber-generator group (thermochemical compressor) to

complete the refrigeration cycle, which can be divided into ammonia absorption, lithium bro-

mide absorption and absorption diffusion of three kinds. 

③ steam injection chiller. Rely on the role of the steam injector (jet compressor) to complete

the chiller cycle. 

④ Semiconductor chiller. The thermoelectric effect of semiconductors is used to produce cold. 

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