Introduction To Compressor

The compressor is regarded as the heart of the refrigeration system. The special term that best represents the characteristics of the compressor is called "steam pump". The actual responsibility of the compressor is to increase the pressure, raising the suction pressure state to the exhaust pressure state.
Compression ratio is a technical representation of pressure difference, which means the absolute pressure on the high pressure side divided by the absolute pressure on the low pressure side. The absolute pressure value must be used to calculate the compression ratio. In order to avoid the compression ratio calculation value to appear negative, the absolute pressure must be used when calculating the pressure ratio, rather than the gauge pressure. Only by using the absolute pressure value can the compression ratio calculation value be positive, which makes sense.
There are five major types of compressors used in the refrigeration and air-conditioning industry: reciprocating, screw, rotary, scroll and centrifugal. Among them, reciprocating is the most widely used compressor in small and medium-sized commercial refrigeration systems. Screw compressors are mainly used in large commercial and industrial systems. Rotary compressors and scroll compressors are mainly used in household and small-capacity commercial air-conditioning devices, while centrifugal compressors are widely used in air-conditioning systems in large buildings.
Various reciprocating compressors are generally classified according to the compressor housing form and the drive mechanism setting method. According to the shell type, there are open type and closed type semi-closed type compressors. The closed type means that the entire compressor is set in a shell.