公开(公告)号：US20200011330A1

公开(公告)日：2020-01-09

申请号：US16490129

申请日：2018-02-26

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas BLAD

IPC: F04D13/06 ,  F04D13/12

Abstract: A circulation pump assembly (22) includes an electrical drive motor (10) and an electronic control device (12) controlling the drive motor (10). The control device (12) is configured for the speed control of the drive motor (10) according to a control schema (I, II, III). The control device (12) includes a detection function (42) which is configured to detect a condition variable representing an operating condition, from a parallel flow path (16, 18, 20) with a second circulation pump assembly (22). The control device (12) is also configured such that it can change the control schema (I, II, III) on the basis of a condition variable detected by the detection function (42). Further an arrangement of at least two such circulation pump assemblies (22) and a method for the control of such two circulation pump assemblies (22) are provided.

公开(公告)号：US20180291908A1

公开(公告)日：2018-10-11

申请号：US15767500

申请日：2016-10-10

Applicant: GRUNDFOS HOLDING A/S

Inventor： Thomas BLAD ,  Peter MØNSTER

IPC: F04D15/00 ,  F04D29/42 ,  F04D29/48 ,  F16K11/048 ,  F24D3/02 ,  F24D3/10

Abstract: A pump assembly includes an impeller (18), which for rotation is connected to an electrical drive motor (20) which can be driven in two rotation directions (A, B) and a valve (10) situated in an inlet of the pump assembly. The valve includes a valve element (48) movable between at least two switch positions and is connected for movement to a drive element (36, 60) subjected to the flow produced by the impeller (18). The valve element (48), in at least a first of the two switch positions, closes an inlet channel (44, 46) of the pump assembly (12) and is arranged such that the movement direction into this first switch position corresponds to the flow direction (S1, S2) through this inlet channel (44, 46). A hydraulic system is provided with two circuits and such a pump assembly. The valve serves as a switch-over valve between the two circuits.

公开(公告)号：US20170356449A1

公开(公告)日：2017-12-14

申请号：US15538470

申请日：2015-12-16

Applicant: Grundfos Holding A/S

Inventor： Thomas BLAD ,  Christian BLAD

IPC: F04D13/06 ,  F16K31/143 ,  F04D15/00 ,  F16K11/07 ,  F24D19/10 ,  F24D3/08 ,  F24D3/10

Abstract: A hydraulic system includes a circulation pump assembly (2) provided with a speed controller (4, 26), a hydraulic circuit (A, B) connected to the circulation pump assembly (2) as well as a mechanical switch device (86, 88; 120, 122; 120″, 122″) which is subjected to pressure from a fluid in the hydraulic circuit (A, B) and which can be moved into at least two different switch positions. The mechanical switch device (28; 86, 28; 120, 122) can be moved by the circulation pump assembly (2) by way of a hydraulic coupling via the fluid. The speed controller is configured to initiate a movement of the switch device (86, 88; 120, 122; 120″, 122″) by way of at least one hydraulic force acting thereon and causing a movement of the switch device (86, 88; 120,122; 120″, 122″), produced via the hydraulic circuit, via a speed adaptation of the circulation pump assembly.

公开(公告)号：US20170336081A1

公开(公告)日：2017-11-23

申请号：US15538491

申请日：2015-12-16

Applicant: Grundfos Holding A/S

Inventor： Thomas BLAD ,  Christian BLAD

IPC: F24D19/10 ,  F16K11/00 ,  F04D15/00 ,  F24D3/08 ,  F04D13/06

CPC classification number: F24D19/1012 ,  F04D13/06 ,  F04D13/0606 ,  F04D15/0005 ,  F04D15/0022 ,  F04D15/0066 ,  F04D29/4293 ,  F16K19/003 ,  F24D3/08 ,  F24D19/1066 ,  Y02B30/745

Abstract: A hydraulic system includes at least one circulation pump assembly (2) provided with a speed controller (4, 26), at least one hydraulic circuit (A, B) connected to the circulation pump assembly (2) as well as at least one mechanical switch device (86, 88; 120, 122) which is mechanically subjected to pressure by a fluid in the hydraulic circuit (A, B) and which can be moved into at least two different switch positions. The mechanical switch device (86, 88; 120, 122) moves by the circulation pump assembly (2) hydraulic coupling via the fluid. The speed controller is configured to initiate a movement of the switch device (86, 88; 120, 122), by at least one hydraulic force acting upon the switch device (86, 88; 120, 122) and causing a movement of the switch device (86, 88; 120; 122) via the hydraulic circuit, via a speed adaptation of the circulation pump assembly (2).