公开(公告)号：US20190293065A1

公开(公告)日：2019-09-26

申请号：US16302209

申请日：2017-05-10

Applicant: Xylem IP Management S.à r.l.

Inventor： Zhiyong Zhong

IPC: F04B49/06 ,  F04B47/02 ,  F04B47/06 ,  F04D13/08

Abstract: Described herein is a method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method includes regulating, by way of the control unit, the operational speed of the pump in order to direct an average power of the pump towards a predetermined set level. The method includes determining whether the instantaneous power of the pump is outside a predetermined range, by monitoring at least one of the parameters: power [P], current [I] and power factor [cos ϕ]. The method further includes determining whether the operational speed of the pump is increasing, and stopping the pump due to snoring, by way of the control unit, when the instantaneous power of the pump is determined as being outside the predetermined range at the same time the operational speed of the pump is determined as increasing.

公开(公告)号：US11255333B2

公开(公告)日：2022-02-22

申请号：US16302209

申请日：2017-05-10

Applicant: Xylem IP Management S.à r.l.

Inventor： Zhiyong Zhong

IPC: F04D15/02 ,  F04B49/06 ,  F04D13/08 ,  F04D15/00 ,  F04B49/025 ,  F04B47/02 ,  F04B47/06

Abstract: A method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method includes regulating, by way of the control unit, the operational speed of the pump in order to direct an average power of the pump towards a predetermined set level. The method includes determining whether the instantaneous power of the pump is outside a predetermined range, by monitoring at least one of the parameters: power [P], current [I] and power factor [cos ϕ].The method further includes determining whether the operational speed of the pump is increasing, and stopping the pump due to snoring, by way of the control unit, when the instantaneous power of the pump is determined as being outside the predetermined range at the same time the operational speed of the pump is determined as increasing.