How does the inlet flow of air compressor change (increase or decrease) and how does the outlet pressure change?

The flow rate (FAD) of the compressor is represented by the air flow rate in the suction state.

As far as the compressor system is concerned, the compressor exhaust pressure is certain, which is lower than this exhaust pressure point, indicating that the gas consumption at the gas end is insufficient. At this time, the intake valve is fully opened and the flow rate reaches the maximum; On the contrary, it is higher than the exhaust pressure point, and the gas is sufficient. At this time, the intake valve is in capacity until no-load operation, and the exhaust pressure is maintained at the exhaust pressure point.

In your words: the phenomenon is that the flow becomes larger and the pressure becomes smaller; The flow rate decreases and the pressure increases.