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Title:
WATER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2014031796
Kind Code:
A
Abstract:

To provide a water supply device that can prevent water hammer from occurring in a case where a pump is activated first after a water supply device stops due to power failure or failure of the water supply device.

A water supply device 1 includes: a pump P; a motor M that drives the pump P; and a control unit 35 that activates the pump P when a discharge side pressure is equal to or less than a predetermined activation pressure, and performs a command of rotation speed of the pump P to an inverter 20 so that the discharge side pressure becomes a target pressure. The control unit 35 performs a protective activation operation in which increase of the discharge side pressure is more gradual than a normal activation operation, when the pump P is activated after the water supply device 1 stops for a long time.


Inventors:
KOMATSU TAKAHIDE
KANEDA KAZUHIRO
MIYAUCHI SHOKO
Application Number:
JP2013238204A
Publication Date:
February 20, 2014
Filing Date:
November 18, 2013
Export Citation:
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Assignee:
EBARA CORP
International Classes:
F04D15/00
Domestic Patent References:
JPS62226313A1987-10-05
Attorney, Agent or Firm:
Isamu Watanabe
Tetsuya Hirosawa



 
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