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Patent Searching and Data


Title:
WATER SUPPLY DEVICE AND METHOD FOR OPERATING THE SAME
Document Type and Number:
Japanese Patent JP2017137800
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a water supply device capable of surely detecting failure of a flow rate detector without outputting an alarm for a temporary abnormality of the flow rate detector.SOLUTION: A water supply device includes a pump 2, an electric motor 3 for driving the pump 2, a pressure sensor 26 for measuring a discharge side pressure of the pump 2, a flow rate detector 24 for detecting a small water amount state, and a control section 20 for controlling operation of the pump 2. The control section 20 adds one to an abnormal count value of the flow rate detector 24 when the flow rate detector 24 does not detect the small water amount state and the discharge side pressure reaches a prescribed starting pressure during stopping of the pump 2, executes retry operation for stopping the pump 2 after operating for prescribed time when the abnormal count value does not reach a set value, and outputs an alarm of failure of the flow rate detector 24 when addition of the abnormal count value and the retry operation is repeated until the abnormal count value reaches the set value.SELECTED DRAWING: Figure 2

Inventors:
HARADA YOSUKE
TEJIMA TOMOJI
Application Number:
JP2016018496A
Publication Date:
August 10, 2017
Filing Date:
February 03, 2016
Export Citation:
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Assignee:
EBARA CORP
International Classes:
F04D15/00; F04B49/10
Domestic Patent References:
JP2006169962A2006-06-29
JPH02183819A1990-07-18
JPH09268978A1997-10-14
JP2005291180A2005-10-20
JP2009008035A2009-01-15
JP2015025427A2015-02-05
Attorney, Agent or Firm:
Isamu Watanabe
Tetsuya Hirosawa