24
2018
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07
Basic overview of compressors
Author:
Compressors are divided into piston compressors, screw compressors, centrifugal compressors, etc.
Piston compressor is generally composed of housing, motor, cylinder, piston, control equipment (starter and thermal protector) and cooling system. There are two cooling methods: oil cooling and natural cooling.
can be divided into positive displacement compressor and speed compressor according to its principle. The volume type is divided into: reciprocating compressor, rotary compressor; speed type compressor is divided into: axial compressor, centrifugal compressor and mixed flow compressor.
Nowadays, household refrigerators and air conditioner compressors are both positive displacement type, which can be divided into reciprocating type and rotary type. Reciprocating compressors use piston, crank, connecting rod mechanism or piston, crank, sliding tube mechanism, and rotary compressors are mostly rolling rotor compressors. In commercial air conditioners, most of them are centrifugal, scroll, and screw.
can be divided into low back pressure type, medium back pressure type and high back pressure type according to the scope of application. Low back pressure type (evaporating temperature -35 ～ -15 ℃), generally used in household refrigerators, food freezers, etc. Medium back pressure type (evaporation temperature -20 ～ 0 ℃), generally used in cold drink cabinets, milk refrigerators, etc. High back pressure type (evaporating temperature -5 ～ 15 ℃), generally used in room air conditioners, heat pumps, etc.
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