| 摘要 |
PROBLEM TO BE SOLVED: To provide compressed-air production facility improving stability of supply pressure, while implementing energy-saving effects. SOLUTION: The compressed-air production facility comprises: a compressor 1 compressing air; an electric motor 2 driving the compressor 1; and an inverter 3 variably controlling a revolution speed of the electric motor 2. The compressed-air production facility further comprises: a pressure sensor 9 detecting discharge pressure of the compressor 1 at a position 15a upstream of a discharge air system 7 connected with a discharge side of the compressor 1; and a control device 4 calculating pressure lossΔP of the discharge air system 7 depending on revolution speed N of the electric motor 2, changing a control range of the discharge pressure of the compressor 1 at the position 15a upstream of the discharge air system 7 based on the pressure loss so that terminal pressure at a position 15b downstream of the discharge air system 7 becomes a predetermined range, and variably controlling the revolution speed N of the electric motor 2 through an inverter 3 so that the discharge pressure of the compressor 1 detected by the pressure sensor 9 is within the changed control range. COPYRIGHT: (C)2008,JPO&INPIT
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