GREE Air-ccoled Closed Control Unit Service Manual
116
5. Disassembly and Assembly of the Unit
5.1 Introduction to Key Parts
Picture Name Function
Compressor
Core of cooling system;
provides energy for cyclic
flow of refrigerant
Electronic
Expansion Valve
Throttle device inside the
cooling system. Throttle
liquid refrigerant with high
pressure and reduce its
pressure; Guarantee
pressure differenc
between condenser and
evaporator; Make
refrigerant entering
evaporator evaporate and
absorb heat under
designed low pressure
and adjust its quantity to
adapt the change of
evaporator load so that
the system can stably
operate.
Solenoid valve
Turn on or off the pipeline
of refrigerant system to
control flow of refrigerant.
There are feed Solenoid
valve, dry Solenoid valve
and by-pass Solenoid
valve.
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