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1108/18/1608/18/16
VARIABLE DISPLACEMENTVARIABLE DISPLACEMENT
COMPRESSORCOMPRESSOR
SAY WHAT, YOUR
KILLI’N ME HERE!
2208/18/1608/18/16
??
3308/18/1608/18/16
Which is more serious, a flooded evaporator or aWhich is more serious, a flooded evaporator or a
starved evaporator? Why?starved evaporator? Why?
a)a) A flooded evaporator, because theA flooded evaporator, because the
refrigerant will not evaporate.refrigerant will not evaporate.
b)b) A starved evaporator, because sufficient heatA starved evaporator, because sufficient heat
will not be absorbed in the evaporator.will not be absorbed in the evaporator.
c)c) A starved evaporator, because refrigerant willA starved evaporator, because refrigerant will
be superheated on return to the compressor,be superheated on return to the compressor,
damaging the compressor.damaging the compressor.
d)d) none of the above are correctnone of the above are correct
e)e) A flooded evaporator, because liquidA flooded evaporator, because liquid
refrigerant may return to the compressor,refrigerant may return to the compressor,
damaging the compressor.damaging the compressor.
4408/18/1608/18/16
THE V.D.C.THE V.D.C.
THE VARIABLE DISPLACEMENT
AIR CONDITIONER COMPRESSOR
has been in usefor about 20 years. It is
usually an axial compressor, with the
pistons arranged around and parallel to
the driveshaft. One-way reed valves in the
cylinder head control refrigerant flow into
and out of each cylinder.
5508/18/1608/18/16
THE 6-CA COMPRESSOR.THE 6-CA COMPRESSOR.
6608/18/1608/18/16
THE 6-CA COMPRESSOR.THE 6-CA COMPRESSOR.
7708/18/1608/18/16
THE 6-CA COMPRESSOR.THE 6-CA COMPRESSOR.
8808/18/1608/18/16
THE 6-CA COMP.THE 6-CA COMP.
9908/18/1608/18/16
ELECTRONIC CONTROLELECTRONIC CONTROL
..
101008/18/1608/18/16
ELECTRONIC CONTROLELECTRONIC CONTROL
Today almost all manufacturers
offer electronically controlled variable
displacement compressors.
The electronic displacement control
valve makes it easier to run the compressor
continuously because displacement
can be reduced closer to
zero than with a mechanical valve.
Clutchless CompressorClutchless Compressor
111108/18/1608/18/16
Clutchless CompressorClutchless Compressor
121208/18/1608/18/16
141408/18/1608/18/16

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