Title:
WATER FEEDER
Document Type and Number:
WIPO Patent Application WO/1998/050700
Kind Code:
A1
Abstract:
A water feeder for pressure feeding water to a desired location by the use of a volute pump, which comprises a volute pump (2) driven by a motor, a frequency converter (13) for supplying the motor with electricity, and a pressure tank (7). When frequencies generated by the frequency converter (13) are sensed to indicate that the pump is operated with a flow rate below a predetermined value, an output of the frequency converter is stopped to stop the pump. The frequency converter (13) is preset to generate higher frequencies in a region of small flow rates than in a region of large flow rates.
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Inventors:
KOBAYASHI MAKOTO (JP)
YAMAMOTO MASAKAZU (JP)
MIYAKE YOSHIO (JP)
YAGI KAORU (JP)
UWAI KEITA (JP)
MIYAZAKI YOSHIAKI (JP)
IIJIMA KATSUJI (JP)
YAMAMOTO MASAKAZU (JP)
MIYAKE YOSHIO (JP)
YAGI KAORU (JP)
UWAI KEITA (JP)
MIYAZAKI YOSHIAKI (JP)
IIJIMA KATSUJI (JP)
Application Number:
PCT/JP1998/001956
Publication Date:
November 12, 1998
Filing Date:
April 28, 1998
Export Citation:
Assignee:
EBARA CORP (JP)
KOBAYASHI MAKOTO (JP)
YAMAMOTO MASAKAZU (JP)
MIYAKE YOSHIO (JP)
YAGI KAORU (JP)
UWAI KEITA (JP)
MIYAZAKI YOSHIAKI (JP)
IIJIMA KATSUJI (JP)
KOBAYASHI MAKOTO (JP)
YAMAMOTO MASAKAZU (JP)
MIYAKE YOSHIO (JP)
YAGI KAORU (JP)
UWAI KEITA (JP)
MIYAZAKI YOSHIAKI (JP)
IIJIMA KATSUJI (JP)
International Classes:
F04D15/00; F04D15/02; (IPC1-7): F04B49/06
Foreign References:
| JPS6445983A | 1989-02-20 | |||
| JPH08210291A | 1996-08-20 | |||
| JPH0996292A | 1997-04-08 | |||
| JPH08284872A | 1996-10-29 | |||
| JPS4868202U | 1973-08-30 | |||
| JPS60188889U | 1985-12-14 |
Attorney, Agent or Firm:
Watanabe, Isamu (5-8 Nishi-Shinjuku 7-chom, Shinjuku-ku Tokyo, JP)
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