FLUID PUMP FOR DELIVERING A FLUID

Abstract

A fluid pump for delivering a fluid of a cooling system is disclosed. The fluid pump includes a pump housing surrounding a pump housing interior on which a fluid inlet for introducing the fluid into the pump housing interior and a fluid outlet for discharging the fluid out of the pump housing interior are disposed. A delivery unit is arranged in the pump housing interior for driving the fluid introduced into the pump housing interior. An electric motor is arranged in the pump housing interior for driving the delivery unit. A control device is arranged outside the pump housing and comprises power electronics. The control device is electrically connected to the electric motor for controlling the electric motor.

Claims

1. A fluid pump for delivering a fluid of a cooling system, comprising: a pump housing surrounding a pump housing interior on which a fluid inlet for introducing the fluid into the pump housing interior and a fluid outlet for discharging the fluid out of the pump housing interior are disposed, a delivery unit arranged in the pump housing interior for driving the fluid introduced into the pump housing interior, an electric motor arranged in the pump housing interior for driving the delivery unit, and a control device arranged outside the pump housing and comprising power electronics, wherein the control device is electrically connected to the electric motor for controlling the electric motor.

2. The fluid pump according to claim 1, wherein the control device is arranged spaced apart from the pump housing and electrically connected to the electric motor via an electrical connection.

3. The fluid pump according to claim 1, wherein the control device includes a housing structured separately from the pump housing, and wherein the housing of the control device surrounds a housing interior in which the power electronics is arranged.

4. The fluid pump according to claim 3, wherein the housing of the control device is arranged spaced apart from the pump housing.

5. The fluid pump according to claim 3, wherein a housing material of the housing of the control device is a metal at least in one region.

6. The fluid pump according to claim 3, wherein an electrical feedthrough is provided on each of the pump housing and on the housing of the control device, and wherein an electrical connection is fed through each electrical feedthrough between the electric motor and the power electronics.

7. The fluid pump according to claim 6, wherein the electrical connection includes at least two electrical supply lines for electrically energising the electric motor.

8. The fluid pump according to claim 6, wherein the electrical connection includes an electrical shield.

9. The fluid pump according to claim 1, wherein the pump housing is a one-piece housing.

10. The fluid pump according to claim 9, wherein the one-piece pump housing is structured out of at least two housing parts which that are each non-detachably connected to one another via a firmly bonded connection.

11. The fluid pump according to claim 9, wherein the one-piece pump housing includes a pump housing flange for mounting the pump housing to an external cooling system, and wherein pump housing flange radially projects from a circumferential wall of the pump housing and is integrally formed on the circumferential wall.

12. The fluid pump according to claim 1, wherein a material of the pump housing includes a plastic.

13. A cooling system, comprising: a fluid path that can be flowed through by a fluid, a fluid pump arranged in the fluid path for delivering the fluid in the fluid path, the fluid pump including: a pump housing surrounding a pump housing interior on which a fluid inlet for introducing the fluid into the pump housing interior and a fluid outlet for discharging the fluid out of the pump housing interior are disposed, a delivery unit arranged in the pump housing interior for driving the fluid introduced into the pump housing interior, an electric motor arranged in the pump housing interior for driving the delivery unit, a control device arranged outside the pump housing and comprising power electronics, wherein the control device is electrically connected to the electric motor for controlling the electric motor, and wherein the control device of the fluid pump is arranged spaced apart from the pump housing and is thermally coupled to the fluid path, so that the waste heat generated by the control device during operation is passed on to the fluid delivered through the fluid path.

14. The cooling system according to claim 13, wherein the fluid path is delimited by a tubular body, on which the control device is arranged.

15. The cooling system according to claim 13, further comprising a modular flange, on which the fluid pump is fastened.

16. The cooling system according to claim 15, wherein the pump housing includes a pump housing flange projecting radially from a circumferential wall of the pump housing, and wherein the pump housing flange is coupled to the modular flange for mounting the fluid pump.

17. The cooling system according to claim 13, wherein the control device includes a housing structured separately from the pump housing, and wherein the housing of the control device surrounds a housing interior in which the power electronics is arranged.

18. The cooling system according to claim 17, wherein the pump housing and the housing of the control device each have an electrical feedthrough, and wherein an electrical connection between the electric motor and the power electronics is fed through the electrical feedthrough of the pump housing and the housing of the control device.

19. The cooling system according to claim 18, wherein the electrical connection includes an electrical shielding line.

20. The cooling system according to claim 18, wherein the electrical connection includes at least two electrical supply lines for electrically energising a stator of the electric motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] It shows, in each case schematically:

[0026] FIG. 1 a rough schematic representation of a cooling system according to the invention,

[0027] FIG. 2 the fluid pump of the cooling system of FIG. 1 in a separate perspective representation.

DETAILED DESCRIPTION

[0028] FIG. 1 illustrates in a schematic representation an example of a cooling system 20 according to the invention having a fluid pump 1 according to the invention. The cooling system 20 includes a fluid path 21 that can be flowed through by a cooling medium K in the form of a fluid F. In the fluid path 21, the fluid pump 1 for delivering the fluid F is arranged. The fluid path 21 can be delimited for example by a tubular body 22. The fluid pump 1 includes a pump housing 2 which surrounds a pump housing interior 3.

[0029] For illustration, FIG. 2 shows the fluid pump 1 only shown schematically in FIG. 1 in a perspective representation. On the pump housing 2 a fluid inlet 4a for introducing the fluid F into the pump housing interior 3 is formed on the front side and a fluid outlet 4b (only noticeable in FIG. 1, concealed in FIG. 2) is formed on the circumferential side for discharging the fluid F out of the pump housing interior 3. In the pump housing interior 3, a delivery unit 18 for driving the fluid F introduced into the pump housing interior 3 is provided. Further, an electric motor 19 for driving the delivery unit 18 is arranged in the pump housing interior 3. The electric motor 19 can be a three-phase motor. For controlling the movement of a rotor (not shown) of the electric motor 19 and for the electrical energising of the stator (not shown) of the electric motor 19 required for this purpose, an electrical control device 6 with power electronics 5 is present outside the pump housing 2. For controlling or electrically energising the electric motor 19, the control device 6, arranged spaced apart from the pump housing 2, is electrically connected to the electric motor 19 by means of an electrical connection 15.

[0030] As illustrated by FIG. 2, the pump housing 2 can have a cylindrical geometrical shape. An axial direction A then extends along a centre longitudinal axis M of the cylindrical pump housing 2. A radial direction R extends perpendicularly to the axial direction A away from the centre longitudinal axis M. A circumferential direction U runs perpendicularly both to the axial direction A and also to the radial direction R round about the centre longitudinal axis M. In the exemplary scenario the pump housing 2 is formed in one piece. Here, the pump housing 2 is formed out of three housing parts 11a, 11b, 11c, which are each non-detachably connected to one another by means of a firmly bonded connection 7a, 7b—for example a welded connection. The material of the pump housing 2 can be a plastic. The one-piece pump housing 2, as shown in the FIGS. 1 and 2, can comprise a pump housing flange 8 for mounting the pump housing 2 to a modular flange 23 of the cooling system 20. According to FIG. 2, the pump housing flange 8 can project from a circumferential wall 9 of the pump housing 2 radially to the outside and be integrally formed on the same. The circumferential wall 9 of the pump housing 2 extends along the circumferential direction U and completely encircles the centre longitudinal axis M. The pump housing flange 8, as shown in FIG. 2, can comprise multiple projections 10 arranged spaced apart from one another along the circumferential direction U and projecting from the circumferential wall 9 radially to the outside, in each of which a through-opening 25 is arranged. The through-openings 25 can be used for screw connections. The cooling system 20 can comprise a modular flange 23 on which the fluid pump 1 can be fastened with the pump housing flange 8. By means of the pump housing flange 8, the fluid pump 1 can be screwed to the modular flange 23.

[0031] The control device 6 according to FIG. 1 includes a housing 12 formed separately from the pump housing 2, which surrounds a housing interior 14 (not shown in FIG. 2). The power electronics 5 are arranged in the housing interior 14 of the control device 6. As is further illustrated by FIG. 1, the housing 12 of the control device 6 is arranged spaced apart from the pump housing 2. On the pump housing 2 and on the housing 12 of the control device 6, an electrical feedthrough 24a, 24b each is present. By way of the two feedthroughs 24a, 24b, an electrical connection 15 is fed through between the electric motor 19 and the power electronics 5. In the example, the electrical connection 15 includes four electrical supply lines 16 for electrically energising the coils of the stator (not shown) of the three-phase electric motor 19. The electrical connection 15 can additionally include an electrical shield 13 for shielding the supply lines 16, which in turn can comprise an electrical shielding line 17.

[0032] Since according to FIG. 1 the control device 6 of the fluid pump 1 is arranged spaced apart from the pump housing 2, the fluid pump 1 can be directly arranged on the tubular body 22 delimiting the fluid path 21. Because of this the power electronics 5 in turn can be thermally coupled to the fluid or cooling medium K conducted through the fluid path 21. In this way, the waste heat generated by the power electronics 5 is transferred to the fluid 5 as a result of which the power electronics 5 is cooled.

[0033] The housing material of the housing 12 of the control device 6 is a metal at least in regions. This applies in particular to that region of the housing 12 which lies against the tubular body 22. In this way, the thermal contact between the power electronics 5 and the fluid F flowing through the tubular body 22 can be improved.