| 摘要 |
PROBLEM TO BE SOLVED: To execute optimal operation in a whole range and enable highly efficient operation by operating pump workload by a control device using a flow rate sensor, a pressure sensor and a current sensor, and executing control using PWM control, PAM control or the like. SOLUTION: A pump device 1 is provided with the control device capable of controlling rotation speed and having an input function on a pump device main body, and a motor 1 capable of changing rotation speed by the control device. The pump device is provided with a pressure tank accumulating water pumped and pressurized by a pump part, the pressure sensor 4 detecting delivery pressure of the pump, and a current sensor detecting current flowing to the motor and the control device. Moreover, the pump device provided with the flow rate sensor 17 detecting quantity of pumped water is provided with a water quantity sensor detectible in a wide range. Consequently, efficient operation is enabled in a whole use range, heat generation is suppressed and the control device can be miniaturized. COPYRIGHT: (C)2007,JPO&INPIT
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