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Title:
WATER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2010229859
Kind Code:
A
Abstract:

To provide a water supply device preventing pressure on a secondary side of a water supply pump from becoming excessive.

The water supply device 1 includes a plurality of pump units respectively connected to a branch pipe branching off a suction pipe 12 in at least three directions, and having a water supply pump and a motor; a pump package 13 having a control panel (a controlling means) 40; a discharging pipe 14 provided on a downstream side of the pump package 13, an elevated water tank (a water supply portion) 16 connected to the discharging pipe 14 and provided with a water level detector 15, and an automatic opening/closing valve 19 provided on a primary side of the elevated water tank 16. The automatic opening/closing valve 19 is closed according to a water level detected by the water level detector 15. The control panel 40 tunes the frequencies of at least two motors at the same frequency and lowers that, and then a motor is stopped.


Inventors:
KISHI NOBUHIRO
TAMAGAWA MITSURU
Application Number:
JP2009076766A
Publication Date:
October 14, 2010
Filing Date:
March 26, 2009
Export Citation:
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Assignee:
KAWAMOTO PUMP MFG
International Classes:
F04D15/00; F04B49/00
Domestic Patent References:
JP2003269340A2003-09-25
JP2008202555A2008-09-04
JPS62288385A1987-12-15
JPH09151858A1997-06-10
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen