| 摘要 |
PROBLEM TO BE SOLVED: To make the motive power consumption the minimum when a plurality of sets of compressors are operated in parallel in a compressed air manufacturing equipment. SOLUTION: In a compressed air manufacturing equipment having a compressor No. Acv machine of a variable rotation speed, and plural compressor No. Bcc machine, compressor No. Ccc machine... of a constant rotation speed, control devices Ac, Bc, Cc,... are provided corresponding to one to one to the compressors. The control devices are made in plural floors, and the control device Ac is the uppermost device, and then, in the order the control device Bc, the control device Cc,... they are made in the lower devices. In the compressor No. Acv machine as the upper position machine, the rotation speed is controlled preferentially, and then, the lower position compressor No. Bcc machine, No. Ccc machine,... are operated in a full leading, or stopped, in a turnback control or in a rotary control.
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