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4.Refrigeration cycle diagram
“1 drive 3 system” is made up of one “1 drive 1 system” and one “1 drive 2 system”.
PMV1
1 drive 2 system
SV1
：
Primary four-way valve SV2
：
Secondary four-way valve PMV1
，
PMV2
：
Electronic expansive valve
T1
，
T2
：
Indoor pipe temperature sensor
Condenser
Four-way valve
Evaporator
Compressor
1 drive 1 system
Notice
：
For 1 drives 2 system, there are two individual refrigerant circuit and two compressors, but for the 1drive 2
system in the 1 drive three system, there is only one refrigerant circuit and only one compressor.
PMV2
SV2
SV1
2
＃
1
＃
T2
T1
refrigeration distributor
Compressor
