CONTROL DEVICE FOR COMPRESSOR

摘要

A control device for a compressor has inflow amount-regulating means (5) for regulating the amount of a fuel gas flowing into a compressor (1), a recycle valve (7) for returning the fuel gas discharged from the compressor (1) to the entrance side of the compressor (1), and control means for setting a control operation value for operating the compressor (1) at a predetermined operating point and controlling the inflow amount-regulating means (5) and the recycle valve (7) based on the control operation value. The control means has first control signal-producing means (27) and second control signal-producing means (29). When the control operation value is equal to or greater than a predetermined value, the first control signal-producing means (27) produces a signal that is increased as the control operation value is increased, the signal serving as a control signal for the inflow amount-regulating means (5). When the control operation value is smaller than a predetermined value, the second control signal-producing means (29) produces a signal that is reduced as the control operation value is increased, the signal serving as a control signal for the recycle valve (7).