Title:
WATER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2023072981
Kind Code:
A
Abstract:
To suppress the stopping of water supply or the decreasing of water supply amount, immediately after switching to pump controlling by a control board for backup.SOLUTION: A first pump control portion 51 and a second pump control portion 52 simultaneously execute the same control processing, and select a control signal for a switching control portion 4 to transmit it to a drive portion 3. Therefore, control processing by the first pump control portion 51 and control processing by the second pump control portion 52 become the same. Even if an abnormal condition occurs in the first pump control portion 51 and it is switched to control by the second pump control portion 52, continuity between control processing before switching and control processing after switching can be maintained. Even immediately after switching from the control of an electric pump 2 by the first pump control portion 51 to the control of the electric pump 2 by the second pump control portion 52, a problem of discontinuity of water supply characteristics such as the stopping of water supply and the rapid decreasing or increasing of water supply amount hardly occurs.SELECTED DRAWING: Figure 1
Inventors:
SAKATANI TETSUNORI
WATANABE SHOTA
WATANABE SHOTA
Application Number:
JP2021185751A
Publication Date:
May 25, 2023
Filing Date:
November 15, 2021
Export Citation:
Assignee:
KAWAMOTO PUMP MFG
International Classes:
F04D15/00; F04B49/10
Attorney, Agent or Firm:
Nagoya International Patent Attorney Corporation