Daikin GYEQ20AN, Руководство по обслуживанию

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SiAUY361411EA System Diagrams
Device Overview 14
5. System Diagrams
5.1 Refrigerant System Diagrams
5.1.1 Cooling Mode Operation
• High-temperature, high-pressure refrigerant gas compressed by the compressor is fed via the
solenoid valve to the outdoor heat exchanger, which in turn condenses the refrigerant gas
while radiating the condensation heat into the outdoor air; this is where the refrigerant
changes from gas to liquid.
• The indoor electronic expansion valve depressurizes the liquid refrigerant to facilitate
refrigerant evaporation in the evaporator.
• It is the indoor heat exchanger that functions as the evaporator, which deprives the indoor air
of evaporation heat by changing the refrigerant from liquid to gas. The indoor air is cooled
through this evaporation heat deprivation process.
• Finally, gasified refrigerant enters into the outdoor unit and returns via the solenoid valve to
the compressor, completing one cooling cycle.
GYEQ20AN
∗
The actuators and refrigerant flow may vary depending on the control.
Waste heat
recovery
device
Accumulator
Receiver
Oil
cooler
Outdoor heat exchanger F
Outdoor heat exchanger B
Outdoor fan
Indoor unit
Oil separator
Compressor 1
Compressor 2
Indoor unit
BS unit
BS unit
(Intake gas)
(Discharge gas)
(Liquid)
PL
: Solenoid valves
: Electronic expansion valve
: Discharge temperature
: Intake temperature
: Oil temperature : Check valve
: Stop valve
: High-side pressure switch
: High pressure sensor
: Low pressure sensor SV
EV
TD
TS
TO
: Receiver temperature TREC
CV
BV
HPS
PH