Daikin GYEQ20AN, Руководство по обслуживанию

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SiAUY361411EA System Diagrams
Device Overview 18
5.1.3 Heating Main B / Heating Mode Operation
• High-temperature, high-pressure refrigerant gas compressed by the compressor is fed to the
indoor heat exchanger on the heating side, which in turn condenses the refrigerant gas and
heats the indoor air by radiating the condensation heat; this is where the refrigerant changes
from gas to liquid.
• The outdoor electronic expansion valve (and indoor electronic expansion valve on the cooling
side) depressurize the liquid refrigerant to facilitate refrigerant evaporation in outdoor heat
exchanger F/B (and the indoor heat exchanger on the cooling side) and the waste heat
recovery device.
• It is outdoor heat exchanger F/B (and the indoor heat exchanger on the cooling side) that
function as the evaporator, which deprives the air of evaporation heat by changing the
refrigerant from liquid to gas. (The indoor unit on the cooling side cools the indoor air through
this evaporation heat deprivation process.) Also, the refrigerant that has passed through the
waste heat recovery device completely evaporates and deprives the gas engine cooling water
(hot water) of heat.
• The refrigerant that has passed through outdoor heat exchanger F/B (and the indoor heat
exchanger on the cooling side) is fed to the waste heat recovery device, which in turn
completely evaporates the refrigerant by mixing it with high-temperature, high-pressure
refrigerant and then returns it to the compressor. This completes one cooling/heating cycle.
∗
The operations in parenthesis ( ) are not performed in the heating mode.
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
Indoor unit
Oil separator
Compressor 1
Compressor 2
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