2, frequency conversion operation
When the pressure of the oil and gas tank rises to a certain value, the pressure maintenance valve is opened, the air is output, and the control system performs PID closed-loop control on the output frequency of the inverter according to the feedback of the set pressure and the output pressure to accurately stabilize the output of the air compressor. pressure.
3, heavy truck / empty car / sleep
When the inverter output frequency drops to the Z* low frequency set by the air compressor, the pressure continues to rise until the unloading pressure setting value, the bleed solenoid valve starts to deflate, the intake valve closes, and the air is bypassed. As the road enters, the pressure in the oil and gas tank begins to vent, and at this moment, the pressure maintenance valve closes quickly to isolate the system pressure. The pressure in the oil and gas barrel is continuously released to a certain value, that is, the empty vehicle pressure, to provide the power required for the oil circulation.