| 摘要 |
<p>PURPOSE: To improve a convenience for use and maintainability by providing the door of a control box to house an inverter and a control device for a control substrate, so as to be capable of being opened and closed in a direction toward a ceiling, regarding a pump device started and stopped automatically on the open/close operation of a faucet. CONSTITUTION: A plurality of motor-driven pump heads 2 and 3 are mounted on a common bed 1, and a pressure tank 14 is as well mounted thereon. Also, the bed 1 has a control box 16 mounted thereon for housing an inverter to change a motor speed via the change of a frequency applied to a motor, as well as a control device or the like for outputting such a frequency instruction to the inverter as corresponding to the change of the delivery pressure value of a pump device detected with a pressure sensor. In addition, the door 17 of the control box 16 is formed to be capable of being opened and closed along a direction toward a ceiling. According to this construction, a work can be conducted while the inside of the control box 16 being watched from an upper level at the time of checking or changing the control device, thereby allowing a work to be easily implemented.</p> |
