Operating Principles
Oil that gets past the oil separators flows through the condenser, subcooler and expansion valve into the evaporator. This oil is collected in the pool of refrigerant that is maintained in the bottom of the evaporator. A small amount of oil and refrigerant from this pool (state 4b) is returned through a line that is connected to the compressor down stream of the motor. This oil and refrigerant mixes with the refrigerant vapor that was drawn out of the evaporator, prior to injection into the compressor rotors.
Evaporator
Refrigerant
Pressure
Transducer
P
E
Condenser
| EXV |
| Evaporator |
| Condenser |
| Refrigerant |
Evaporator | Pressure |
| |
OilReturnLineFilter | Transducer |
|
|
|
| P |
|
|
| C |
Compressor |
| Oil |
|
| Compressor |
|
|
|
| Separator |
|
| Heater |
|
|
|
|
| OilSeparator |
BearingandRotor | Internal | Manual | SumpHeater |
| |||
Restrictorsand | Compressor | Service |
|
|
| ||
Oilinjection | OilFilter | Valve |
|
|
|
| Intermediate | CompressorOil |
|
|
| OptionalOil | |
|
|
| |
KEY | OilPressure | TemperatureSensor | Cooler |
RefrigerantwithTransducer smalamountofOil
P
I
Refrigerant&OilMixture (refrigerantvaporandoil)
OilRecoverySystem (liquidrefrigerantandoil)
PrimaryOilSystem
Figure 35 RTAC Oil System
90 |
|
