Fluid Filter with a Filter Connecting Piece Having an Outer Section, a Middle Section and an Inner Section

Abstract

A fluid filter for a fluid device with one or more of a pump element and a solenoid valve in a motor vehicle, in particular for an ESP system. The fluid filter is formed by direct injection molding and has at least one filter connecting piece. The filter connecting piece has an outer section, a middle section, and an inner section. The outer section is in the form of a projection that is directed outwards with respect to the fluid filter. The inner section is in the form of a projection that is directed inwards with respect to the fluid filter.

Claims

1. A fluid filter for a fluid apparatus having one or more of a pump element and a solenoid valve in a motor vehicle, the fluid filter comprising: at least one filter interconnecting piece having an outer section, a middle section, and an inner section, wherein the outer section is configured as a projection that is directed outward with regard to the fluid filter, and the inner section is configured as a projection that is directed inward with regard to the fluid filter, and wherein the fluid filter is formed by direct injection molding.

2. The fluid filter as claimed in claim 1, wherein the outer section and the inner section of the filter interconnecting piece have geometries that are configured to be described in each case by a differentiable function.

3. The fluid filter as claimed in claim 1, wherein one or more of the outer section and the inner section of the filter interconnecting piece has a flow-optimized shape.

4. The fluid filter as claimed in claim 1, wherein one or more of the outer section and the inner section has a flattening geometry.

5. The fluid filter as claimed in claim 1, wherein one or more of the outer section and the inner section of the filter interconnecting piece has a shape with a low coefficient of flow resistance.

6. The fluid filter as claimed in claim 1, wherein the outer section and the inner section of the filter interconnecting piece have a different shape.

7. The fluid filter as claimed in claim 1, wherein the inner section has a higher gradient than the outer section for the same radial height.

8. The fluid filter as claimed in claim 1, wherein one or more of: a vertex of the inner section is at a smaller spacing from the middle section than a vertex of the outer section, and a greater curvature radius is configured at the vertex of the inner section than at the vertex of the outer section.

9. The fluid filter as claimed in claim 1, wherein a geometry of the filter interconnecting piece (5) is one or more of configured (i) for fluids with high flow velocities and (ii) such that turbulences in the fluid are reduced.

10. The fluid filter as claimed in claim 1, wherein a flow-optimized geometry of the filter interconnecting piece is determined by simulation.

11. A solenoid valve, comprising: a fluid filter for a fluid apparatus that includes the solenoid valve in a motor vehicle, the fluid filter formed by direct injection molding and having at least one filter interconnecting piece, wherein the filter interconnecting piece comprises an outer section, a middle section, and an inner section, the outer section configured as a projection that is directed outward with regard to the fluid filter, and the inner section configured as a projection that is directed inward with regard to the fluid filter.

12. A pump element, comprising: a fluid filter (1) for a fluid apparatus that includes the pump element in a motor vehicle, the fluid filter formed by direct injection molding and having at least one filter interconnecting piece, wherein the filter interconnecting piece comprises an outer section, a middle section, and an inner section, the outer section configured as a projection that is directed outward with regard to the fluid filter, and the inner section configured as a projection that is directed inward with regard to the fluid filter.

13. The fluid filter as claimed in claim 1, wherein the fluid filter is configured for an ESP system.

14. The fluid filter as claimed in claim 5, wherein the shape of the one or more of the outer section and the inner section is configured in a hemispherical shell-like or droplet-shaped or parabolic or catenary curve-shaped manner.

15. The fluid filter as claimed in claim 1, wherein a geometry of one or more of the outer section and the inner section is one or more of configured (i) for fluids with high flow velocities and (ii) such that turbulences in the fluid are reduced.

16. The fluid filter as claimed in claim 1, wherein a flow-optimized geometry of one or more of the outer section and the inner section is determined by simulation.

Description

EMBODIMENTS

[0037] It is to be noted that the features which are presented individually in the description can be combined with one another in any desired, technically appropriate way, and indicate further refinements of the invention. Further features and expediencies of the invention result from the description of exemplary embodiments using the appended figures, in which:

[0038] FIG. 1a shows a partial view of a solenoid valve having a fluid filter in accordance with the prior art,

[0039] FIG. 1b shows a detailed view of a part of the fluid filter for a solenoid valve in accordance with the prior art,

[0040] FIG. 2a shows a partial view of a pump element having a fluid filter in accordance with the prior art,

[0041] FIG. 2b shows a detailed view of a part of the fluid filter for a pump element in accordance with the prior art,

[0042] FIG. 3 shows a diagrammatic illustration of two filter interconnecting pieces in accordance with one embodiment according to the invention,

[0043] FIG. 4a shows a detailed view of a part of the fluid filter for a solenoid valve in accordance with one embodiment according to the invention, and

[0044] FIG. 4b shows a detailed view of a part of the fluid filter for a pump element in accordance with one embodiment according to the invention.

[0045] FIG. 1a shows a partial view of a solenoid valve (3) having a fluid filter (1) in accordance with the prior art. The solenoid valve (3) is shown in an incomplete state. The position of the fluid filter (1) can be gathered from the illustration. The position from which the following detailed view is taken is marked, furthermore. FIG. 1b shows a detailed view of a part of the fluid filter (1) for a solenoid valve (3) in accordance with the prior art. Here, a partial detail of a fluid filter (1) is shown in longitudinal section. Filter interconnecting pieces (5) are shown here. They have a middle section (7) and an outer section (8).

[0046] Furthermore, the flowing direction (4) of the fluid is marked. This is bidirectional. That is to say, an inflow and an outflow take place.

[0047] FIG. 2a shows a partial view of a pump element (2) having a fluid filter (1) in accordance with the prior art. The pump element (2) is shown in an incomplete state. The position of the fluid filter (1) can be gathered from the illustration. The position from which the following detailed view is taken is marked, furthermore. FIG. 2b shows a detailed view of a part of the fluid filter (1) for a pump element (2) in accordance with the prior art. Here, a partial detail of a fluid filter (1) is shown in longitudinal section. Filter interconnecting pieces (5) are shown here. They have a middle section (7) and an outer section (8). Furthermore, the flowing direction (4) of the fluid is marked. This is unidirectional. That is to say, only an inflow takes place.

[0048] FIG. 3 shows a diagrammatic illustration of two filter interconnecting pieces (5) in longitudinal section in accordance with one embodiment according to the invention. The filter interconnecting piece (5) likewise comprises a middle section (7). Furthermore, the filter interconnecting piece (5) comprises an outer section (8) and an inner section (6). They are configured as projections. The projections have rounded shapes. Both the outer section (8) and the inner section (6) have a vertex (s6, s8) which defines the respective maximum extent. At the vertex (s8), the outer section (8) has a smaller curvature radius (r8) than the inner section (6) with the curvature radius (r6). Furthermore, two tangents (t6, t8) are shown. The two tangents (t6, t8) bear against the outer side of the filter interconnecting piece (5), at the same radial spacing (h) in relation to the center axis. Here, the tangents (t6, t8) have a gradient (a), the gradient (a6) of the tangent (t6) on the inner section (6) being greater than the gradient (a8) on the outer section (8). Furthermore, the flow direction (4) of the fluid is shown. In said exemplary embodiment, the fluid flows from the outside through the fluid filter (1), said fluid passing first of all the outer section (8), then the middle section (7) and finally the inner section (6) of the filter interconnecting piece (5).

[0049] FIG. 4a shows a detailed view of a part of the fluid filter (1) for a solenoid valve (3) in accordance with one embodiment according to the invention. Filter interconnecting pieces (5) can be seen here. They have an outer section (8), a middle section (7) and an inner section (6). Furthermore, the flow direction (4) of the fluid is illustrated. This is bidirectional in the exemplary embodiment which is shown. That is to say, an inflow and an outflow take place.

[0050] FIG. 4b shows a detailed view of a part of the fluid filter (1) for a pump element (2) in accordance with one embodiment according to the invention. Filter interconnecting pieces (5) can be seen here. They have an outer section (8), a middle section (7) and an inner section (6). Furthermore, the flow direction (4) of the fluid is illustrated. This is unidirectional in the exemplary embodiment which is shown. That is to say, only an inflow takes place.