<human>: What are the different types of air compressors?
<bot>: The different types of air compressors include piston, rotary screw, centrifugal, and reciprocating. Piston-style air compressors use a piston to compress air, while rotary screw compressors use a rotating screw to move air in and out of the compressor. Centrifugal compressors use a rapidly spinning rotor to force air into a smaller space, while reciprocating compressors use a piston that moves up and down within the cylinder.