公开(公告)号：US11365891B2

公开(公告)日：2022-06-21

申请号：US15532278

申请日：2015-03-10

Applicant: Grundfos Holding A/S

Inventor： Carsten Skovmose Kallesøe ,  René Stig Bergqvist ,  Lars Sund Mortensen

IPC: F24D19/10 ,  F04D15/00 ,  F24D3/10 ,  F04D13/06 ,  H04Q9/00

Abstract: A method of balancing a heating system with a flow system, including a supply flow line (60) and a return flow line (70), a heat source (55) and a pump (10) hydraulic lines (L1-Ln), some having a heating element (H1-Hn) with a balancing valve (V1-Vn). The method includes: carrying out one or more measurements by opening one hydraulic line only and determining a flow rate through the pump and a pressure difference across the pump, establishing a hydraulic model based on the determined flow rate and pressure difference from at least two measurements from step, and at least one additional measurement for at least two hydraulic lines, specifying a desired flow rate for each of the hydraulic lines, and adjusting one or more of the dedicated balancing valves in order to meet the desired flow rate for each of the hydraulic lines by using the hydraulic model.

公开(公告)号：US09982675B2

公开(公告)日：2018-05-29

申请号：US14501576

申请日：2014-09-30

Applicant: GRUNDFOS HOLDING A/S

Inventor： Kim Hulegaard Jensen ,  Lars Sund Mortensen ,  Jan Carøe Aarestrup

IPC: F04D15/00 ,  H02H7/08 ,  H02H7/085 ,  H02H3/00 ,  H02P29/032

CPC classification number: F04D15/0077 ,  F04D15/0066 ,  H02H3/006 ,  H02H7/0833 ,  H02H7/0852 ,  H02P29/032

Abstract: A method for controlling the power limit of a pump device includes controlling the power limit of the pump device on the basis of a pump media temperature Tm and an ambient temperature Ta measured inside a control box of the pump device. A pump device, in particular a centrifugal pump, is driven by a motor. The motor is controlled by a control box wherein temperature sensors for measuring a media temperature Tm and an ambient temperature Ta are arranged in the control box so as to control the power limit of the pump device depending on the measured media temperature Tm and an ambient temperature Ta.

公开(公告)号：US20240102478A1

公开(公告)日：2024-03-28

申请号：US18469332

申请日：2023-09-18

Applicant: Grundfos Holding A/S

Inventor： Bjarne Dindler Rasmussen ,  Lars Sund Mortensen ,  Ole Bech-Lisberg ,  Matthias Skødt Larsen

IPC: F04D27/00

CPC classification number: F04D27/004

Abstract: The invention relates in a first aspect to method of venting air out of a closed fluid system comprising a number of inter connected pipes configured for flow of a fluid, a variable speed pump configured for controlling the volume flow of fluid in said fluid system and an air venting device configured to let air out from the fluid system, the method comprising operating said pump in at least three phases.

公开(公告)号：US10508656B2

公开(公告)日：2019-12-17

申请号：US14892727

申请日：2014-04-28

Applicant: GRUNDFOS HOLDING A/S

Inventor： Lars Sund Mortensen ,  Kim Hulegaard Jensen

IPC: F04D27/00 ,  F24S50/40 ,  F04D15/00 ,  F24D17/00

Abstract: A circulation pump assembly (2) includes an electric drive motor (6) and a control device (10) integrated into the circulation pump assembly (2). At least one internal temperature sensor (16) is arranged in the circulation pump assembly (2) and detects the temperature of the medium delivered by the circulation pump assembly (6) and issues a corresponding temperature signal (42) to the control device (10). The control device (10) is configured, on the basis of the temperature signal (42) of the internal temperature sensor (16), to approximately determine the temperature of the liquid in a liquid storage means (26) which is connected to the circulation pump assembly (2) via a heating circuit (28).