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valve at the inlet and outlet to facilitate the replacement of the filter element.
Oil separator outlet set check valve
A one-way valve must be set at the outlet of the oil separator to prevent the backflow of
the gas in the condenser and to quickly balance the pressure on the discharge side and the
suction side of the compressor during shutdown and bypass. Note that the one-way valve in
the compressor cannot replace the one-way valve to complete the shutdown bypass and
prevent the refrigerant from dissolving in the oil during shutdown.
7. 3 External oil circuit system
lubricating oil cooling
When the compressor operates at a low temperature, the lubricating oil will not be cooled,
and the oil temperature will be too high and will not work properly, so the system needs to be
equipped with an oil cooler. The oil cooler can reduce the compressor discharge temperature
and prolong the compressor life.
Note: The compressor inlet oil temperature should not exceed 60
Oil coolers mainly include air cooling and water cooling, and the heat of oil cooling can be
calculated by RFC selection software.
1) Air-cooled oil-cooled:
The oil temperature is realized by the thermostat on and off the oil cooler fan or the
stepless speed regulation of the oil cooler fan. The suggested system is as follows:
legend：
2）Water-cooled oil-cooled:
Oil temperature regulation is carried out through a water volume regulating valve controlled by
a temperature controller. The suggested system is as follows:
1) Compressor
2) Oil sight glass
3) Solenoid valve
4) Oil flow switch
5) Oil filter
6) Three-way mixing
valve
7)
Air-cooled
oil
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