公开(公告)号：US20220194826A1

公开(公告)日：2022-06-23

申请号：US17552442

申请日：2021-12-16

Applicant: Grundfos Holding A/S

Inventor： Sébastien D'ANTONIO ,  Victor Augusto Yangali QUINTANILLA ,  Joachim Back KAAS ,  Kristian Lydersen RINDOM

IPC: C02F1/50

Abstract: A method and apparatus are provided for dosing biocide into fluid. A biofilm sensor configured to measure an amount of biofilm on the biofilm sensor is used. A method identifies, if present, in a data set representing measurement over time by the biofilm sensor a minimum and an inflection point and, if identified. According to some embodiments, dosing of biocide is determined to be effectuated when an inflection point has been identified occurring time wise after an identified minimum.

公开(公告)号：US11359639B2

公开(公告)日：2022-06-14

申请号：US15782070

申请日：2017-10-12

Applicant: GRUNDFOS HOLDING A/S

Inventor： Poul Johannes Henning

IPC: F04D29/08 ,  F04D7/04 ,  F04D29/16 ,  F04D29/42 ,  F04D29/22 ,  F04D11/00

Abstract: A waste water pump includes an impeller (12) and a surrounding pump housing (4), wherein an impeller side chamber (20) is formed between the impeller (12) and the pump housing (4). The impeller side chamber (20) has a first seal (16) between the impeller (12) and the pump housing (4), towards the intake side (32) of the impeller (12), and a second seal (18) between the impeller (12) and the pump housing (4), towards the pressure side (14) of the impeller (12). The first seal (16) is provided with a conveying device (28, 30) configured to convey debris from the impeller side chamber (20) to the intake side (32) of the impeller (12). The second seal (18) is provided with conveying device (38, 40) configured to convey debris from the side chamber (20) to the pressure side (14) of the impeller (12).

公开(公告)号：US11359623B2

公开(公告)日：2022-06-14

申请号：US15293768

申请日：2016-10-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Torben Thorsager Dissing

IPC: F04B49/06 ,  F04B49/02 ,  F04B49/08 ,  F04D15/02 ,  G05D16/20

Abstract: A pump control method for controlling at least one booster pump (4). The method includes switching on the booster pump when a booster pump outlet pressure (24) drops to a lower limit value (26), and switching off the booster pump when the booster pump outlet pressure (24) reaches an upper limit value (28). The lower limit value (26) is reduced in a case, in which the maximal outlet pressure (24a) which can be reached on operation of the booster pump (4) lies below the lower limit value (26). A pressure-boosting device is also provided with which the pump control method can be carried out.

公开(公告)号：US11333151B2

公开(公告)日：2022-05-17

申请号：US16492795

申请日：2018-03-13

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas Blad

IPC: F04D15/00 ,  F24D3/10 ,  F04D1/00 ,  F04D13/06 ,  F04D29/42 ,  F04D29/48

Abstract: A centrifugal pump assembly includes an electrical drive motor (4, 6), an impeller (14) which is driven by the drive motor and a pump casing (12) surrounds the impeller and including two branches (27, 32, 34). A movable valve element (18) is arranged in the pump casing and is movable between two switching positions, in which the flow paths through the two branches (27, 32, 34) are opened to a different extent. The valve element (18) is configured and arranged in the pump casing (12) such that it separates a suction chamber (24) which is connected to a suction side of the impeller (14) from a delivery chamber (26) which is in connection with the delivery side of the impeller (14). The valve element (18) is mechanically and/or hydraulically coupled to the drive motor (4, 6) for at least a movement between the two switching positions.

公开(公告)号：US11293559B2

公开(公告)日：2022-04-05

申请号：US17017935

申请日：2020-09-11

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen Mikkelsen

IPC: F16K15/02 ,  F16K15/18 ,  F04B53/10 ,  F16K27/02

Abstract: A valve system (13), connectable to a pump system (1), includes a pump assembly (3) connectable to a pipe (5), wherein the valve system (13) includes a valve (15) including a pipe section (39), of the pipe (5), that defines a primary flow direction (19), and a valve opening (41) in the pipe section, a valve seat (43) and a valve body (45). The valve opening (41), the valve seat (43) and the valve body (45) define a common valve axis (47) extending transversely to the primary flow direction. An operating element (49), arranged at the pipe section opposite the valve opening, is configured to control the valve body for operating in a check-valve mode to open the valve opening upon a fluid flow from the valve opening towards the valve body and for operating in a shut off-valve to close the valve opening for any fluid flow direction.

公开(公告)号：US11280344B2

公开(公告)日：2022-03-22

申请号：US16470876

申请日：2017-12-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Brian Lundsted Poulsen ,  Lasse Søgaard Ledet

IPC: F04D29/16 ,  F04D17/08

Abstract: A centrifugal pump includes at least one pump stage, with a rotatable impeller (5) with a suction port (6) which is sealed with respect to a stationary pump part (1) by way of a sealing arrangement. The sealing arrangement includes a sealing ring (9) between the impeller (5) and the stationary pump part (1). The sealing arrangement is configured such that at least on delivery operation of the pump, the sealing arrangement has sealing sections which are distanced to the counter sealing surface and sealing sections which bear on the counter sealing surface, in an alternatingly successive manner considered in the peripheral direction of the sealing ring (9).

公开(公告)号：US11243000B2

公开(公告)日：2022-02-08

申请号：US16668711

申请日：2019-10-30

Applicant: GRUNDFOS HOLDING A/S

Inventor： Søren Emil Sørensen

IPC: F24D3/10 ,  F24D3/12 ,  F24D3/14 ,  F24H1/12 ,  F24D19/10

Abstract: A hydraulic manifold for a hydraulic heating and/or cooling system includes a feed conduit (212) and a return conduit (216). The feed conduit (212) includes at least one feed connection (258), and the return conduit (216) includes at least one return connection (260), for the connection of a load circuit (228). A load module (204), in which a section of the feed conduit (212) with the feed connection (258), and a section of the return conduit (216) with the return section (260) are formed, includes at least one mixing device with a pump (232) and with a regulating valve (230), to admix fluid from the return connection (260) to a fluid flow from the feed conduit (212) to the feed connection (258). The section of the feed conduit (212) and the return conduit (216) in each case include an additional contact for connection with a further load module.

公开(公告)号：US20220019182A1

公开(公告)日：2022-01-20

申请号：US17376687

申请日：2021-07-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Carsten Skovmose KALLESØE ,  Mogens Groth NICOLAISEN

IPC: G05B13/04 ,  H04Q9/02 ,  G08B21/18

Abstract: A multi-pump control system with a control module, a processing module, communication interface, and a storage module. The system is configured to change a number n of running pumps, and receive a signal indicative of a power consumption P and information about a speed ω of one of the n running pumps before and after two different changes of the number n of running pumps. The system is configured to determine, before and after at least two different changes of the number n of running pumps, without a measurement of a differential pressure Δp and of a flow Q, two approximated pump characteristics Pn and Δ{tilde over (p)}n, wherein each of the approximated pump characteristics Pn and Δ{tilde over (p)}n is unambiguously defined by a pair of parameters (θ1, θ2; θ3, θ4). The system is configured to store the pair of parameters (θ1, θ2; θ3, θ4) for each of the determined approximated pump characteristics Pn and Δ{tilde over (p)}n.

公开(公告)号：US11162504B2

公开(公告)日：2021-11-02

申请号：US16472596

申请日：2017-12-22

Applicant: GRUNDFOS HOLDING A/S

Inventor： Helge Grann ,  John Frigård Nielsen ,  Erik Bundesen Svarre ,  Per Frost Vedsted

IPC: F04D29/12 ,  F04D1/06 ,  F16J15/34 ,  F04D29/10 ,  F04D1/00

Abstract: A cartridge seal is provided for sealing a shaft (4) with respect to a housing (2) and is intended to be a slide ring seal arrangement (12) for a centrifugal pump. The cartridge seal includes a shaft protection sleeve which is rotationally connected to the shaft (4) by a retaining ring, a support (24) for incorporating the cartridge seal into a housing opening of the pump housing (2), a slide ring which is rotationally connected to the shaft protection sleeve and a counter slide ring which is rotationally connected to the support (24), as well as an enclosed space (30) within the sealing arrangement. The space (30) is fluidically connected to a sealing gap formed between the slide ring and the counter slide ring, and is at least partially prefilled with liquid in order to prevent dry running when the pump is operated for the first time.

公开(公告)号：US20210284551A1

公开(公告)日：2021-09-16

申请号：US17186849

申请日：2021-02-26

Applicant: Grundfos Holding A/S

Inventor： Mette LÆGDSMAND ,  Nicolai Bæk THOMSEN ,  Alexander Engels RYMING

IPC: C02F1/00 ,  G06N3/08

Abstract: A computer implemented method and a system abates the presence of sulphide (H2S(g), H2S(aq) or HS-(aq)) in a wastewater flowing in a specific wastewater network from an upstream pumping pit to a downstream pumping pit or manhole. The computer implemented method and a system includes dosing into the wastewater at a position upstream of the downstream pit or manhole a chemical for abatement of sulphide, determining by use of a sensor the concentration of sulphide at a position downstream of the position at which chemical is dosed into the wastewater, such as located in the downstream manhole. The amount of chemical dosed is determined by use of a general agent and a specific agent.