Refrigeration compressors are an important device for vapor compression refrigeration units. There are many forms of refrigeration compressors. According to different working principles, they can be divided into two categories: volumetric refrigeration compressors and centrifugal refrigeration compressors. At present, the commonly used compressors mainly include piston compressors, scroll type, screw type and centrifugal type compressors.
The volumetric refrigeration compressor compresses the metered gas that is periodically sucked in by changing the volume of the working chamber. Commonly used volumetric refrigeration compressors include reciprocating piston refrigeration compressors and rotary refrigeration compressors.
The centrifugal refrigeration compressor continuously compresses the sucked gas by the action of centrifugal force. This type of compressor has a high number of revolutions and a large refrigeration capacity. At present, the single-unit refrigeration capacity of Freon centrifugal refrigeration compressors for foreign air conditioners is as high as 30,000 kW.
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