公开(公告)号：US20250084999A1

公开(公告)日：2025-03-13

申请号：US18244447

申请日：2023-09-11

Applicant: Grundfos Holding A/S

Inventor： Ole BECH-LISBERG ,  Mathias Skødt LARSEN ,  Jesper Vorgod LAURSEN

IPC: F24D17/00 ,  F24D19/10 ,  G05D7/06

Abstract: A circulation pump for supplying hot water to a hot water inlet of a temperature-controlled bypass valve for domestic hot-water recirculation, the circulation pump including a pump controller configured for controlling a pump motor such that the pump motor cycles between on-phases and off-phases, the circulation pump further including a sensor for measuring at least one operation parameter of the circulation pump; the pump controller being configured such that an on-phase is terminated and an off-phase is initiated when an output signal of the sensor indicates that said at least one operation parameter reaches a termination threshold value or range.

公开(公告)号：US20250052246A1

公开(公告)日：2025-02-13

申请号：US18719406

申请日：2022-12-02

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen MIKKELSEN ,  Troels JEPSEN ,  Brian LUNDSTED POULSEN

IPC: F04D13/06 ,  F04D1/00 ,  F04D29/044 ,  F04D29/10 ,  F04D29/42

Abstract: A pump assembly includes an electric drive motor with a motor drive shaft and a rotor. The motor drive shaft extends along a rotor axis and the rotor is mechanically coupled to the motor drive shaft. A pump housing encloses an impeller that is mechanically coupled to a pump drive shaft. The pump drive shaft extends along the rotor axis. The motor drive shaft is releasably coupled to the pump drive shaft by a drive shaft coupling for transferring torque from the motor drive shaft to the pump drive shaft. The drive shaft coupling is arranged within the motor drive shaft for transferring torque from the motor drive shaft to the pump drive shaft by frictional connection. The drive shaft coupling is accessible by an elongate tool through the second axial hollow motor drive shaft drive end for selectively tightening and releasing the drive shaft coupling.

公开(公告)号：US20250052245A1

公开(公告)日：2025-02-13

申请号：US18718882

申请日：2022-12-02

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen MIKKELSEN ,  Troels JEPSEN ,  Keld Folsach RASMUSSEN ,  Kristian CHRISTOFFERSEN

IPC: F04D13/06 ,  F04D1/00 ,  F04D29/42 ,  F04D29/58 ,  H02K5/18 ,  H02K9/19 ,  H02K11/33

Abstract: An integrated electric motor drive. The motor drive having rotatable parts with a drive shaft and a rotor, wherein the drive shaft extends along a rotor axis and the rotor is mechanically coupled to the drive shaft; and static parts having a stator and power electronics for controlling an electric current through the stator. The integrated electric motor drive has a liquid cooling system with a closed liquid cooling circuit and a liquid coolant agitator. The closed liquid cooling circuit is filled with liquid coolant being in thermal contact with the stator and/or the power electronics. The liquid coolant agitator is arranged and configured to circulate the liquid coolant along the closed liquid cooling circuit. The liquid coolant agitator is mounted within the closed liquid cooling circuit to be rotatable about the rotor axis, and the liquid coolant agitator is magnetically coupled to the movable parts.

公开(公告)号：US20250044006A1

公开(公告)日：2025-02-06

申请号：US18696449

申请日：2022-10-07

Applicant: Grundfos Holding A/S

Inventor： Christian RASMUSSEN ,  Mike Dahl GIVERSEN ,  Rune LANGERGAARD

IPC: F25B49/02

Abstract: A method for determining an efficiency of a cooling system including a plurality of electrically powered cooling devices, the cooling system is configured to ramp the total cooling capacity up and down by turning the one or more cooling devices on and off either fully or partly. The method involves providing corresponding values of estimated electrical power consumption and total rated cooling capacity and monitoring and recording the total electrical power consumed by the system.

公开(公告)号：US12215689B2

公开(公告)日：2025-02-04

申请号：US17778262

申请日：2020-11-19

Applicant: GRUNDFOS HOLDING A/S

Inventor： Niels Erik Linnemann Nielsen

IPC: F04C2/107 ,  F04C14/06 ,  F04C15/00

Abstract: An eccentric screw pump with a rotor (2) and with a rotationally fixed stator (6; 6′) surrounding the rotor (2). The rotationally fixed stator includes at least one elastomeric portion, wherein a pressure chamber (16) is arranged on this elastomeric portion of the stator (6; 6′) at a side facing away from the rotor (2). The pressure chamber (16) is connected to a pressure region of the eccentric screw pump such that the at least one elastomeric portion of the stator (6; 6′) is subjected to a pressure produced by the eccentric screw pump.

公开(公告)号：US20240255970A1

公开(公告)日：2024-08-01

申请号：US18611877

申请日：2024-03-21

Applicant: Grundfos Holding A/S

Inventor： John BOMHOLT ,  Niels Jørgen STRØM

IPC: G05D7/06 ,  F04D15/00

CPC classification number: G05D7/06 ,  F04D15/00 ,  F04D15/0066

Abstract: A pump unit has an electrical drive motor and a control device for controlling the drive motor, wherein said control device includes at least one microprocessor and storage means which is able to store at least one control program executable by said microprocessor, wherein said control device includes or communicates with a programming module by which at least one user application can be created and/or modified and stored in said storage means, wherein said programming module is designed such that at least one input parameter, at least one operator and at least one action can be chosen as program elements and combined to generate at least one user function of said user application which can be executed by said microprocessor.

公开(公告)号：US11933308B2

公开(公告)日：2024-03-19

申请号：US17550396

申请日：2021-12-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Martin Byskov Skafsgaard ,  Susanne Hamann Gade ,  Keld Benner Valbjørn ,  Jan Carøe Aarestrup

IPC: F04D15/00 ,  F04D13/06 ,  H02P7/29

CPC classification number: F04D15/0066 ,  F04D13/06 ,  H02P7/29 ,  H02P2207/05

Abstract: A pump assembly with a pump unit comprising an impeller for pumping fluid, an electric motor for driving the impeller, a control module for controlling the speed of the electric motor in a control mode, and an interface for receiving a pulse width modulated (PWM) control signal with a duty cycle indicative of the speed of the electric motor. The control module is configured to interpret the PWM control signal at start-up of the electric motor per default in a configuration mode as a configuration bit sequence based on the duty cycle of the PWM control signal during a pre-determined configuration window.

公开(公告)号：US11879474B2

公开(公告)日：2024-01-23

申请号：US17722900

申请日：2022-04-18

Applicant: GRUNDFOS HOLDING A/S

Inventor： Martin Bang Kristensen ,  Tom Jæger ,  Patrick Pradel ,  Joseph Arnold White ,  Richard James Bibb

IPC: F04D29/22 ,  F04D1/06 ,  F04D17/12 ,  F04D29/043 ,  F04D29/08 ,  F04D29/42 ,  F04D29/58

CPC classification number: F04D29/22 ,  F04D1/063 ,  F04D17/12 ,  F04D29/043 ,  F04D29/083 ,  F04D29/4206 ,  F04D29/584 ,  F04D29/5806

Abstract: A centrifugal pump assembly includes a pump head, a pump base defining a pump inlet and a pump outlet, a fluid outlet channel from the pump head to the pump outlet, impellers, defining an impeller fluid channel between an impeller inlet and outlet and connected with one of rotor shaft segments including a positive fit coupling for torque transfer between at least two rotor shaft segments, and one or more pump stage housing segments arranged between the pump base and the pump head. The pump stage housing segments have a structure defining a guide passage for receiving pumped fluid from the impeller outlet of the impellers and for guiding pumped fluid to the impeller inlet of another one of the impellers or to the pump head. The pump stage housing segments each have a structure defining at least a part of a wall section of the fluid outlet channel.

公开(公告)号：US11859721B2

公开(公告)日：2024-01-02

申请号：US17535487

申请日：2021-11-24

Applicant: GRUNDFOS HOLDING A/S

Inventor： Kjeld Vinther Jacobsen ,  Kristian Skriver Dahl

IPC: F16K11/087 ,  F16K11/078 ,  F16K5/12 ,  G05D23/13

CPC classification number: F16K11/078 ,  F16K5/12 ,  F16K11/0873 ,  G05D23/13

Abstract: A mixing valve having a first inlet port (4), a second inlet port (6) extending transverse to said first inlet port (4) and an outlet port (8). The inlet ports (4, 6) open out into a valve chamber (10) and the outlet port (8) branches off this valve chamber (10), inside which a movable valve element (12) is arranged, having an obstruction (32) inside the second inlet port (6), which protrudes from an inner circumference (36) of the second port (6) into an interior thereof. The obstruction (32) extends at least along a portion of the inner circumference (36), which portion of the circumference (36) is located on an inner side of the second inlet port (6) being distant from the first inlet port (4). A heating or cooling device includes such a mixing valve.

公开(公告)号：US11772985B2

公开(公告)日：2023-10-03

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 ,  C02F1/68 ,  C02F101/10

CPC classification number: C02F1/008 ,  G06N3/08 ,  C02F1/68 ,  C02F2101/101 ,  C02F2209/006

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.