Title:
Boiler feeding device
Document Type and Number:
Japanese Patent JP6186366
Kind Code:
B2
Abstract:
The present invention relates to a water supply apparatus that pressurizes water from a water main pipe to supply the water to a building, such as an apartment building, a commercial building, or the like. The water supply apparatus includes a controller (10) storing a first lower limit value L1 higher than a shutoff rotational speed N0 and a second lower limit value L2 lower than the shutoff rotational speed, which is a rotational speed required for achieving a target pressure PA in a shutoff state. The controller (10) is configured to switch a lower limit of the rotational speed of the pump (1) from the first lower limit value L1 to the second lower limit value L2, and determine that the pump (1) is in a low-flow-rate state if the rotational speed of the pump (1) becomes equal to or lower than the shutoff rotational speed N0 within a predetermined detection time.
Inventors:
Masayoshi Ikeda
Yuji Teshima
Hironori Ninomiya
Noboru Kinoshita
Hiroyuki Tamura
Tateishi Kazufumi
Kaoru Nakajima
Yuji Teshima
Hironori Ninomiya
Noboru Kinoshita
Hiroyuki Tamura
Tateishi Kazufumi
Kaoru Nakajima
Application Number:
JP2014539716A
Publication Date:
August 23, 2017
Filing Date:
September 30, 2013
Export Citation:
Assignee:
Ebara Corporation
International Classes:
F04D15/00
Domestic Patent References:
| JP59200094A |
Attorney, Agent or Firm:
Isamu Watanabe
Tetsuya Hirosawa
Tetsuya Hirosawa
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