Instruction of the GMV D.C. Inverter
18
7 Operating Principle of Air-Conditioning Unit
7.2 Heat Pump Type Digital Multi-Connected Air-Conditioning Unit
M
Low Pressure Switch
High Pressure
Switch
Electric expand vavle
Filter
Filter
One-way Valve
Heat Exchanger
Subcooling condenser
Receiver
Outdoor
Indoor
Cut off valve
Gas-liquid separator
Compresson
Vapillary
Oil seperator
4 way valve
Soleniod Valve
Capillary
Heating
Cooling
Operating Principle Diagram of Heat Pump Type Digital Multi Variable Air-Conditioning Unit
Connect the system to power supply, and the indoor units and the outdoor unit shall start to operate.
When the system is in cooling operation, the low-temperature and low-pressure refrigerant gas from the
heat exchangers of the indoor units converge and is absorbed by the compressor to be compressed into high-
temperature and high-pressure gas. After that, the gas is discharged into the heat exchanger of the outdoor
unit for heat exchange with the air at the outdoor side, so the gas is changed into refrigerant liquid. The liquid
flows into all the indoor units through the Y-type manifold and then passes the throttling component for
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