公开(公告)号：US20220056911A1

公开(公告)日：2022-02-24

申请号：US17415351

申请日：2019-12-19

Applicant: GRUNDFOS HOLDING A/S

Inventor： Róbert CSÁNYI

IPC: F04D7/04 ,  F04D29/42 ,  F04D29/22

Abstract: A centrifugal pump (1) including: a pump housing (3) enclosing a pump chamber (13), the pump chamber (13) including a suction inlet (15) and a pressure outlet (17); an impeller (19) rotatably arranged within the pump chamber (13) for being driven to rotate about a rotor axis (R), the suction inlet (15) being located coaxial with the rotor axis (R); and at least one stationary scraper (39). The impeller (19) includes an impeller base (31) and at least one or more impeller vanes (33) extending from the impeller base (31) towards the suction inlet (15). Each of the impeller vanes (33) includes a radially innermost vane path (45) describing during impeller rotation a central volume (41) that is wider towards the suction inlet (15) than towards the impeller base (31) and configured to receive the at least one scraper (39) projecting from the suction inlet (15) into the central volume (41).

公开(公告)号：US20220026300A1

公开(公告)日：2022-01-27

申请号：US17297158

申请日：2019-11-27

Applicant: Grundfos Holding A/S

Inventor： Kjeld V. JACOBSEN ,  Casper PEDERSEN ,  Per Ellemose ANDERSEN

IPC: G01L19/06

Abstract: The present invention relates to cover for a pressure sensor. The cover is configured for being arranged to cover a sensor element.

公开(公告)号：US20220026011A1

公开(公告)日：2022-01-27

申请号：US17369636

申请日：2021-07-07

Applicant: Grundfos Holding A/S

Inventor： Per HOVMAND

IPC: F16M1/00

Abstract: Some particular preferred embodiments relate to the field of pumping stations for sewage and wastewater with submersible pumps mounted in the bottom of the wells. To allow easy cleaning and maintenance of the pumps without getting in contact with the dirty water the solution is a system for easy lifting of the pump out of the well and lowering the pump again with an auto coupling.

公开(公告)号：US20210396240A1

公开(公告)日：2021-12-23

申请号：US17353002

申请日：2021-06-21

Applicant: GRUNDFOS HOLDING A/S

Inventor： Alessandro IACOPONI ,  Riccardo DAL CANTO

IPC: F04D27/00 ,  F04D29/42 ,  F04D29/22 ,  F04D1/00

Abstract: A centrifugal pump device has at least one impeller (16), a circulation connection between a delivery side (22) of the at least one impeller (16) and a suction side (20) of the at least one impeller (16), and a valve arrangement (30, 46) in said circulation connection (44, 54). The valve arrangement (30, 46) has a first valve mode providing a pressure dependent shut-off valve (46) in the circulation connection. The valve arrangement (30, 46) allows a change between the first valve mode and at least one further valve mode. The at least one further valve mode provides at least one fixed closing degree of the circulation connection (44, 54).

公开(公告)号：US20210388837A1

公开(公告)日：2021-12-16

申请号：US17291144

申请日：2019-10-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Michael Helbo NYGAARD ,  Flemming MUNK ,  Søren KJELDSEN

IPC: F04D15/00 ,  F04D1/06

Abstract: A sensor arrangement is for monitoring a circulation pump system (1) which includes at least one pump (3). The sensor arrangement includes a first vibration sensor (5) installed at a first pump part (11) of one of the at least one pump (3) and a second vibration sensor (7) installed at a second pump part (13) of the pump (3) and an evaluation module (9). The first pump part (11) and the second pump part (29) have a distance to each other. The evaluation module (9), is configured to discriminate between at least two of k≥2 different types of faults based on comparing first signals received from the first vibration sensor (5) and second signals received from the second vibration sensor (7).

公开(公告)号：US11149964B2

公开(公告)日：2021-10-19

申请号：US16269918

申请日：2019-02-07

Applicant: GRUNDFOS HOLDING A/S

Inventor： Agisilaos Tsouvalas ,  Casper Hillerup Lyhne

IPC: F24D19/10 ,  F24F11/63 ,  G05B15/02 ,  G05D23/19

Abstract: A hydronic system (1) includes a side (3) with a first port (21) connected with a source element output (23), a second port (27) connected with a source element input (29), and a controllable primary side flow actuator (9) for providing a primary side flow (q1). Another side (5) has a third port (31) connected with a load element input (33), a fourth port (35) connected with a load element output (37), and a controllable secondary side flow actuator (13) providing a secondary side flow (q2). A transfer element (17) is connected with the first port, the second port, the third port and the fourth port. A flow control module (39) adapts a transfer element thermal power transfer by controlling the primary side flow actuator and/or the secondary side flow actuator by minimizing a signed deviation value (ΔΔv) that is correlated with the transfer element thermal power transfer.

公开(公告)号：US11143190B2

公开(公告)日：2021-10-12

申请号：US16361525

申请日：2019-03-22

Applicant: GRUNDFOS HOLDING A/S

Inventor： Gert Friis Eriksen ,  Jens Kjær Milthers

IPC: F04D13/06 ,  F04D13/16 ,  F04D15/00 ,  F04D29/12 ,  F04D29/10

Abstract: A pump assembly includes an electrical drive motor (2) and an impeller which is connected to the drive motor (2) via a shaft (14). The shaft extends between the drive motor (2) and the impeller, through a seal arrangement with a fluid reservoir (22). A method is provided for detecting a concentration change in a fluid reservoir in the seal arrangement in the pump assembly. A concentration sensor (30) detects a concentration change in the fluid reservoir (22), and a second sensor (32) detects at least one further parameter of the fluid reservoir (22). The sensors are arranged on the fluid reservoir (22). The sensors are connected to an evaluation device (22). The evaluation device (34) is configured to carry out an evaluation of at least one reading of the concentration sensor (30), taking into account at least one reading which is detected by the second sensor (32).

公开(公告)号：US20210233377A1

公开(公告)日：2021-07-29

申请号：US17054438

申请日：2019-05-02

Applicant: GRUNDFOS HOLDING A/S

Inventor： Christian SCHOU ,  Ole Hejn PJENGAARD ,  Carsten Skovmose KALLESØE

IPC: G08B21/18 ,  E03F5/22

Abstract: An alarm management module (13) is for a wastewater pumping station that includes at least one pump (9a, 9b) arranged for pumping wastewater out of a wastewater pit (1). The alarm management module (13) is configured to process at least one level variable (h) indicative of a filling level of the wastewater pit (1) and at least one capacity variable (p %, P %, C %) indicative of a pumping capacity of the wastewater pumping station. The alarm management module (13) is configured to trigger an intervention alarm only if all of the following conditions are met: a) the at least one level variable (h) is at or above a predetermined alarm level threshold (hm), b) the at least one level variable (h) is increasing, and c) the at least one capacity variable (p %, P %, C %) is below a capacity threshold.

公开(公告)号：US11073290B2

公开(公告)日：2021-07-27

申请号：US16391700

申请日：2019-04-23

Applicant: GRUNDFOS HOLDING A/S

Inventor： Søren Emil Sørensen

IPC: F24D3/10 ,  E04B5/48 ,  F16K27/00 ,  F24D3/12 ,  F24D3/14 ,  F24D3/02 ,  F24D19/10 ,  F04D15/00 ,  F16K11/00 ,  F16K11/22

Abstract: A circulation pump assembly for a heating and/or cooling system includes an electric drive motor (108) and a connected pump housing (106) in which at least one impeller (118) is situated and which comprises a first inlet (112) and a first outlet (114). The pump housing (106) includes a second inlet (122) which is connected in an inside of the pump housing (106) at a mixing point (130) to the first inlet (112). A regulating valve (134), which is designed for regulating the mixing ratio of two flows mixing at the mixing point (130), as well as a control device, which controls the regulating valve (134) for regulating the mixing ration, are arranged in the pump housing (106). A hydraulic manifold is provided with such a circulation pump assembly.

公开(公告)号：US11067086B2

公开(公告)日：2021-07-20

申请号：US15586501

申请日：2017-05-04

Applicant: GRUNDFOS HOLDING A/S

Inventor： Janus Lukas Sierakowski-Larsen ,  Ejgil Koustrup

IPC: F04D9/02 ,  F04D9/00 ,  F04D15/00 ,  F04D13/16 ,  F04D1/06 ,  F16K7/17

Abstract: A centrifugal pump (7), with one or more pumping stages, includes a pressure controlled valve (15) inside the pump (7) for supporting self-priming, the pressure controlled valve (15). The pressure controlled valve (15) includes a pretensioned leaf spring (17) and a valve seat (18). The leaf spring (17) has an opened position and a closed position. In the open position the leaf spring (17) is distanced from the valve seat (18). In the closed position the leaf spring (17) closes the valve seat (18). The leaf spring (17) and valve seat (18) are arranged for soft closing.