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6 TRG-TRC004-EN
notes
period one
Compressor Types
In the reciprocating compressor shown, the refrigerant vapor from the suction
line enters the compressor through the suction opening. It then passes around
and through the motor, cooling the motor, before it enters the cylinder to be
compressed. The compressed refrigerant leaves the cylinder, travels through
the headspace, and leaves the compressor through the discharge opening.
Most reciprocating compressors have multiple piston–cylinder pairs attached to
a single crankshaft.
In the air-conditioning industry, reciprocating compressors were widely used in
all types of refrigeration equipment. As mentioned earlier, however, scroll and
helical-rotary compressors have become more common, replacing the
reciprocating compressor in most of these applications because of their
improved reliability and efficiency.
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Figure 9