The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2015
Filed:
Mar. 24, 2014
Ebara Corporation, Tokyo, JP;
Takahide Komatsu, Tokyo, JP;
Kazuhiro Kaneda, Tokyo, JP;
Tomoharu Tejima, Tokyo, JP;
Nobuhiro Higaki, Tokyo, JP;
Sachiko Miyauchi, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
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 () includes: a plurality of pumps (); a plurality of inverters (INV) each configured to change and control a rotational frequency of a corresponding one of the plurality of pumps (); 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 (SW) for turning on and off a communication is provided on the communication lines.