Key components:
1. Oil separator:
Separates oil from gas refrigerant pumped out of the compressor and quickly returns it to the compressor. Separation
efficiency is up to 99%.
2. Gas-liquid separator:
Separates liquid refrigerant from gas refrigerant, stores liquid refrigerant and oil to protect compressor from liquid
hammering.
3. Electronic expansion valve (EEV):
Controls refrigerant flow and reduces refrigerant pressure.
4. Four-way valve(ST1):
Controls heat exchanger function. When open, the heat exchanger functions as an evaporator; when closed, the heat
exchanger functions as a condenser.
5. Solenoid valve SV5:
Controls the refrigerant from microchannel heat exchanger to gas-liquid separator.
6. Solenoid valve SV6:
Allows refrigerant to bypass the expansion valves. Opens in cooling mode when discharge temperature exceeds the
limit. Closed in heating mode and standby.
7. High pressure switch:
Regulate system pressure. When system pressure rises above the upper limit, the high pressure switch turn off, stopping
the compressor. When the high pressure protection recovers, the compressor restarts.
8. High pressure sensor
Used to detect the system high pressure.
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