How the refrigerator works

1 compression chiller. Relying on the action of the compressor to increase the pressure of the refrigerant to achieve the refrigeration cycle, according to the type of refrigerant, it can be further divided into a vapor compression type refrigerator (based on hydraulic evaporative cooling, the refrigerant undergoes periodic gas-liquid phase change) and Gas compression chillers (based on high pressure gas expansion and cooling, the refrigerant is always in a gas state).

2 absorption chiller. The refrigeration cycle is completed by the action of the absorber-generator group (thermochemical compressor), and can be divided into three types: ammonia absorption type, lithium bromide absorption type and absorption diffusion type.

3 steam jet refrigerator. The refrigeration cycle is accomplished by the action of a steam ejector (jet compressor).

4 semiconductor refrigerators. The heat is generated by the thermo-electric effect of the semiconductor.

The main performance indicators of the chiller are the operating temperature (evaporation temperature and condensing temperature for the vapor compression chiller, the temperature of the cold object and the temperature of the cooling medium for the gas compression chiller and the semiconductor chiller), and the cooling capacity (cooling) The amount of heat removed from the object to be cooled in unit time, power or heat consumption, coefficient of refrigeration (measurement of the economy of the compression chiller, the amount of cooling that can be obtained by the unit of work) and thermal coefficient (measured by the absorption type) And the economical index of the steam jet refrigerator refers to the amount of cooling that can be obtained by consuming unit heat. Modern chillers are the most widely used in vapor compression chillers.

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