WATER SUPPLY APPARATUS

摘要

The present invention provides a water supply apparatus capable of performing a backup operation, without lowering water supply capability, when a failure has occurred in one control substrate due to surge or noise caused by lightning or due to lifetimes of various sensors, by switching to the other control substrate, and capable of reliably performing the backup operation by means of devices that prevent failure of the control substrates. The water supply apparatus (1) includes: a plurality of pumps (3); a plurality of inverters (INV) each configured to change and control a rotational frequency of a corresponding one of the plurality of pumps (3); and a plurality of control substrates (CN) configured to control the plurality of inverters (INV). When an abnormality occurs in one control substrate, other control substrate backs up the one control substrate to thereby allow the water supply apparatus to continue its operations. The one control substrate, the plurality of inverters (INV), and the other control substrate are connected in series by communication lines. A switch (SW1) for turning on and off a communication is provided on the communication lines.

主权项

1. A water supply apparatus, comprising:
a plurality of pumps; a plurality of motors configured to drive said plurality of pumps; a plurality of inverters each configured for variable rotational speed control of a corresponding one of said plurality of motors; and a first control board and a second control board each configured to control said plurality of inverters, wherein when an abnormality occurs in said first control board, said second control board backs up said first control board to thereby allow said water supply apparatus to continue its operations, wherein each of said plurality of inverters is provided with at least two different communication ports, and wherein said first control board is connected to said plurality of inverters in series by communication lines and said second control board is connected to said plurality of inverters in series by different communication lines.