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11.1.2 Vane compressors
The operation of vane compressors is based on the
rotation of the rotor and the reduction of the space
available for the refrigerant trapped between the
vanes.
The contact between the vanes and the stator is
sealed by the centrifugal force applied to the vanes
at high speed.
The capacity between two vanes is variable. The
gas is sucked in by the increase in volume before
the inlet tube.
The gas is then trapped between two vanes and
conveyed towards the outlet tube. The volume is
reduced in this zone and the gas is released into
the outlet pipe.
Vane compressor (off-centre rotor)
11.1.3 The compressor ports
As a general rule the compressor ports can be
distinguished based on their diameters
g
Low Pressure (Suction port): Big diameter
g
High Pressure (Discharge port): Small diameter
Nevertheless some compressor does not follow
this rule, the port functions are then indicated by
letters
g
S for Suction
g
D for Discharge
2
3
1
4
5
Suction port (low pressure)
Discharge port (high pressure)
Low pressure
(Suction port)
Big diameter
High pressure
(Discharge port)
Small diameter
11. The components
of the A/C Loop
42