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Title:
FEED WATER SUPPLY SYSTEM
Document Type and Number:
Japanese Patent JP2015025427
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a feed water supply system capable of achieving energy saving while inhibiting a pump start frequency from excessively increasing.SOLUTION: A feed water supply system includes a control unit 40 controlling a pump 2 to operate. If a flow volume falls, the control unit 40 executes a small-water-quantity stop operation that includes a wait-and-see operation for confirming that a state of a small quantity of used water continues, a pressure accumulation operation for accumulating pressure in a pressure tank 28, and stop of the pump 2. The control unit 40 executes the small-water-quantity stop operation in an energy saving mode if operation time of the pump 2 just before the small-water-quantity stop operation is equal to or shorter than a first threshold and previous stop time of the pump 2 exceeds a second threshold. Time of the wait-and-see operation in the energy saving mode is equal to or longer than 0 and shorter than the wait-and-see operation in a normal mode.

Inventors:
TEJIMA TOMOJI
HIGAKI NOBUHIRO
HARADA YOSUKE
MIYAUCHI SHOKO
KONISHI YASUTAKA
KANEDA KAZUHIRO
KARAKI RYOTARO
Application Number:
JP2013156182A
Publication Date:
February 05, 2015
Filing Date:
July 26, 2013
Export Citation:
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Assignee:
EBARA CORP
International Classes:
F04B49/02; E03B11/16; F04B49/06; F04D13/16; F04D15/00
Domestic Patent References:
JPH0996278A1997-04-08
JP2003278659A2003-10-02
JPH0771060A1995-03-14
Foreign References:
WO2013099843A12013-07-04
Attorney, Agent or Firm:
Isamu Watanabe
Tetsuya Hirozawa