Title:
CONTROLLER AND PUMP FACILITY
Document Type and Number:
Japanese Patent JP2023013090
Kind Code:
A
Abstract:
To detect erroneous detection of a full water detector and/or a waterdrop detector.SOLUTION: A pump that is installed at a position above a suction water level, is provided with a full water detector, and is provided with a waterdrop detector at a height below the full water detector, comprises: comparison means of comparing detection results of the presence or absence of water of the full water detector and the waterdrop detector during stop of the pump; and alarm means of outputting an alarm to give a notification on an abnormality of the detector when different states continue for a set period or longer.SELECTED DRAWING: Figure 2
Inventors:
UMEZAWA TAKAO
CHIBA MAKOTO
CHIBA MAKOTO
Application Number:
JP2021117021A
Publication Date:
January 26, 2023
Filing Date:
July 15, 2021
Export Citation:
Assignee:
EBARA CORP
International Classes:
F04D15/00; F04B49/02; F04B49/06
Attorney, Agent or Firm:
Seiji Ohno
Hideki Kobayashi
Hiroyuki Ohno
Morita Koji
Rika Fukami
Tomohiro Matsuno
Seiichi Sakatani
Hiroshi Nomoto
Hideki Kobayashi
Hiroyuki Ohno
Morita Koji
Rika Fukami
Tomohiro Matsuno
Seiichi Sakatani
Hiroshi Nomoto