WO2011113574A1

WO2011113574A1 - Device for deflecting a fluid flow

Info

Publication number: WO2011113574A1
Application number: PCT/EP2011/001268
Authority: WO
Inventors: Daniel Kasack; Peter Zielke; Claus-Christian Steeg; Jürgen Hofmann
Original assignee: Rehau Ag + Co
Priority date: 2010-03-17
Filing date: 2011-03-15
Publication date: 2011-09-22
Also published as: EP2547916A1; DE202010003757U1

Abstract

The present invention relates to a device (10) for deflecting a fluid flow, to a housing (38), and to a system (50) consisting of a housing (38) and a device (10). The invention further relates to a windscreen-wiping system equipped with a system (50) according to the invention.

Description

Device for deflecting a fluid flow

Background of the invention

The present invention relates to a device for deflecting a fluid flow.

Devices for deflecting a fluid flow may be adapted to allow a fluid flowing into the device, in particular a fluid, to escape from the device by suitable flow guidance in the form of a cyclically swiveling fluid jet or fluid jet, as described e.g. from EP 0 007 950 B1 or EP 0 121 035 B1. The known devices are usually accommodated in a housing for forming a fluid deflection system, via which the supply or discharge of the fluid to be deflected or deflected by the device takes place. In order to prevent leakage of the fluid to be diverted from the device, in known solutions the device is opposite the housing using at least one sealant, such as e.g. a sealing lip, sealed. The fixation of the device is usually done via a Hinterrastung.

The fit device / housing requires in the known fluid deflection systems a high dimensional stability over a large sealing surface, which usually extends along the longest side of the component. As a result, the assembly of known fluid deflection systems comprising a device for deflecting the fluid flow, a housing in which the device is accommodated, and at least one sealing means is very complicated and error-prone. Furthermore, the assembly is thus also suitable due to less dimensionally stable parts only limited for a trouble-free assembly process for mounting a variety of fluid deflection systems. Even small deviations already lead to a strong impairment of the function, so that in particular in systems for forming a cyclically pivoting fluid jet this can not be formed due to the deviations. Underlying task

The present invention has for its object to provide a device for deflecting a fluid flow, which allows a device of a system for deflecting a fluid flow, in contrast to known solutions much simpler installation of the system.

Inventive solution

This object is achieved with a device for deflecting a fluid flow with the features of claim 1.

The device according to the invention can be inserted in a practical manner in the direction of the longitudinal axis of the device into a housing. A system for deflecting a fluid flow or a fluid deflection system, which comprises the device and the housing, can therefore be formed or manufactured by a simple assembly, which includes an insertion of the device into the housing.

The first planar sealing surface surrounds the first recess and is provided on an outer surface of the wall facing away from the flow obstacle or on a surface region of the wall facing away from the flow obstacle or formed on this outer surface or surface area.

By providing the first planar sealing surface and by providing the second planar sealing surface formed on the wall, sealing means-such as, for example, in the form of a sealing lip-can be dispensed with for sealing the device with respect to the housing. The seal relative to the housing according to the invention via the first and the second planar sealing surface, which allow a seal of the device relative to the housing by the surface contact of the first sealing surface with a first planar housing surface of the housing and by the surface contact of the second sealing surface with a second flat housing surface of the housing. This provided by the flat contact of two flat surfaces seal very effectively avoids Leakage of the fluid to be deflected by the device from the respective fluid deflection system, ie leakage of fluid from the fluid deflection system into the environment before discharge of the fluid takes place through the second recess.

By the possible omission of sealants, such. a sealing lip, the assembly of the respective fluid deflection system is greatly simplified. Furthermore, the possible dispensing with sealing means can also significantly reduce the susceptibility to error of the respective fluid deflection system-in particular also in the case of process fluctuations in the assembly process-which are known in known solutions, e.g. is significantly higher due to defective and possibly incorrectly placed sealant. Without sealant, it is also possible to significantly reduce the size of the respective fluid deflection system or the space occupied by the fluid deflection system space compared to known solutions.

Overall, therefore, the process reliability in assembly compared to known solutions can be substantially increased, so that in particular by the use of the devices according to the invention in conjunction with the corresponding housings a trouble-free assembly process for mounting a variety of fluid deflection systems in economic or. cost-optimized way is possible.

Furthermore, unlike known solutions, the device according to the invention can also be inserted into a housing, which can also be produced inexpensively using methods other than an injection molding method.

The device according to the invention has a bottom with a bottom surface and a wall extending from the bottom surface. At least one flow obstruction for deflecting the fluid flow is arranged on the bottom surface. The device is open to a side opposite the bottom surface. The wall has a first recess for flowing in fluid and a second recess for exiting the fluid after deflection by the flow obstacle, so that the first recess serves as an inlet and the second recess serves as an outlet.

In a practical embodiment, the device has two from each other

spaced Strömungshindemisse which, together with the wall side of the wall, which faces the flow obstacles, are arranged, the inflowing Fluid in the form of a cyclically pivoting fluid jet to emerge from the second recess. A trained according to this practical embodiment device is particularly suitable for use in windshield wiper systems, namely for cyclically spraying a windshield with the cyclically pivoting fluid jet in the form of a windshield wiper fluid jet.

In a preferred embodiment, the flow obstacle has a height which depends on the floor area and which corresponds to the height of the wall which is determined by the floor area. By means of this preferred embodiment, a very effective deflection or deflection of the fluid is made possible, such that the flow obstacle extends along the entire height extent of the wall.

The device may preferably be in the form of a one-piece injection-molded part, which can be produced in a simple and cost-effective manner.

The invention further relates to a housing, wherein in the housing a device according to the invention is inserted, and wherein the housing has a passage which is provided for forming a fluid-conducting connection between the first recess of the device and the environment of the housing when the device in the Housing is inserted with surface contact between the first sealing surface and the first housing surface and surface contact between the second sealing surface and the second housing surface.

The housing as a housing of a system for deflecting a fluid flow, which comprises the housing and the device according to the invention, allows a mounting of the system, which is much simpler and more practical than is the case with known solutions or systems. By inserting the device according to the invention into the housing and producing the surface contact of the first sealing surface with the first planar housing surface of the housing and the surface contact of the second sealing surface with the second planar housing surface of the housing, a system for deflecting a fluid flow can be provided. which has to provide without sealant to be effectively sealed over the contact of the flat surfaces.

The housing may preferably be in the form of a substantially cylindrical housing, along with a comparison with known solutions, in which the Housing usually has a spherical shape, significantly reduced size. Furthermore, a substantially cylindrical housing is rotatable about its longitudinal axis, so that by providing a suitable mounting position, which includes a predetermined rotational position of the housing about its longitudinal axis, also the flow direction of the deflected by the device or the fluid deflection system fluid relative to the device , on which the housing is mounted or in which it is installed, is adjustable. Thus, for example, desired spray angles of a windshield wiper system having a fluid deflection system with a device according to the invention and a housing according to the invention can be adjusted.

The invention further relates to a system for deflecting a fluid flow, with a device according to the invention and a housing according to the invention, in which the device, preferably non-rotatably, is inserted. Particularly preferred in this case the device is held in the housing by clamping. In this way it is possible to use expensive holding means, such as e.g. Locking mechanisms or the like are dispensed with.

The invention also relates to a windshield wiper system having a system according to the invention for deflecting a fluid flow, the system being provided for deflecting a fluid flow in the form of a windshield wiper fluid flow.

Brief description of the drawings

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. It shows:

1 is a schematic three-dimensional representation of an embodiment of a device according to the invention for deflecting a fluid flow,

2, 3, 4 and 5 are a plan view, a side view, a sectional view and a front view of the embodiment of Fig. 1,

6 is a schematic three-dimensional representation of an embodiment of a housing according to the invention, 7, 8, 9 and 10 are a side view, a plan view and two sectional views of

Embodiment of Fig. 6, and

1, 12 and 13 are a side view, a plan view and a sectional view of a system for deflecting a fluid flow comprising the device shown in Figs. 1 to 5 and the housing shown in Figs. 6 to 10.

1 shows a schematic three-dimensional representation of an embodiment of a device 10 according to the invention for deflecting a fluid flow. The illustrated device 10 can be inserted in the direction of its longitudinal axis 12 in a housing, not shown in this figure housing and clamped durable in this case.

The device 10 has a bottom 14 with a bottom surface 16 and a wall 18 extending from the bottom surface 16, wherein on the bottom surface 16 two flow obstacles 20 for deflecting the fluid flow are arranged. The device 10 is open to a bottom surface 16 opposite side.

The wall 18 has a first recess 22 for the inflow of fluid and a second recess 24 for the discharge of the fluid after deflection by the flow obstacles 20, wherein in this embodiment, the first and the second recess 22, 24 to one of the bottom surface 16 opposite Side are open.

On a side facing away from the flow obstacles 20 outer surface 26 of the wall 18, a first recess 22 surrounding flat first sealing surface 28 is provided, which is normal or substantially normal or substantially perpendicular to the longitudinal axis 12 and a substantially U-shaped course having. On the wall 18, a second planar sealing surface 30 is further formed, which is arranged substantially parallel to the longitudinal axis 12 and substantially parallel to a transverse axis 32 of the device 10, wherein the second sealing surface 30 facing away from the bottom surface 16 in this embodiment Face 34 of the wall 18 is identical.

The two spaced-apart flow obstacles 20 are arranged together with the wall side 36 of the wall 18, which faces the flow obstacles 20, set to flow out through the first recess 22 fluid in the form of a cyclically pivoting fluid jet from the second further recess 24. Each flow obstacle 20 has to achieve an effective fluid deflection to a dimensioning of the bottom surface 16 height, which corresponds to the height of the wall surface 18 of the bottom surface 16.

FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is a sectional view taken along line A-A of FIG. 2, and FIG. 5 is a front view of the embodiment of FIG.

5, it can be seen that the device 0, apart from an outer, the first sealing surface 28 having longitudinal portion, a cross-sectional area or

Has cross-sectional shape which is bounded by two opposite circular arcs of a circle and two opposite straight lines. With this cross-sectional shape, a rotationally secure insertion of the device 10 into the respective housing is possible.

6 shows a schematic three-dimensional representation of an exemplary embodiment of a housing 38 according to the invention, in which the device 10 shown in FIGS. 1 to 5 can be inserted in the direction of its longitudinal axis 12.

The closer construction of the housing 38 of FIG. 6 is shown in FIGS. 7 to 10, wherein FIG. 7 is a side view, FIG. 8 is a plan view, FIG. 9 is a sectional view along the line AA of FIG. 8, and FIG. 10 shows a sectional view of the housing 38 along the line BB of FIG. 7.

As shown in FIG. 9, the housing 38 has a receptacle 40, into which the device 10 for deflecting a fluid flow in the direction of its longitudinal axis 12 can be inserted, wherein in the embodiment shown in Fig. 9, the insertion direction parallel to the longitudinal axis 42 of the housing 38, so that in Fig. 9, the insertion of the device 10 would have to be made in the receptacle 40 from the left side of the housing 38.

The receptacle 40 is substantially adapted to fit the above-described cross-sectional shape of the fluid flow deflecting means 10, further comprising two struts 44 extending in the longitudinal axis direction of the housing 38 upon which the device 10 is located after insertion is or rests (see also Fig. 10). The receptacle 40 bounding wall portion 46 of the housing 38 is thin-walled or relatively thin-walled, so that the receptacle 40 by inserting the device 10 elastically deformable or expandable and the device 10 in an advantageous manner therefore after insertion into the receptacle 40 and Housing 38 is held clamped. On a provision of additional complex compounds, such. B. in the form of locking connections with elaborate Hinterrastungen, can thus be omitted.

The housing 38 has a passage (not shown in detail in FIG. 9), which is provided for forming a fluid-conducting connection between the first recess 22 of the device 10 and the environment of the housing 38, when the device 10 in the housing 38 with planar Contact the two sealing surfaces 28, 30 is inserted to the respective housing surfaces in the housing 38 and in the receptacle 40 of the housing 38. Connected to the passage in fluid-conducting manner is a fluid connection 48 provided on the housing 38, via which the housing 38 can be connected to a fluid line or fluid source (not shown here), which provides the fluid to be supplied to the device 10 via the first recess 22.

Figures 11 through 13 comprise illustrations of a system 50 for deflecting a fluid flow, the system 50 comprising the device 10 shown in Figures 1-5 and the housing 38 shown in Figures 6-10. FIG. 11 is a side view, FIG. 12 is a plan view, and FIG. 13 is a sectional view of the system taken along line AA of FIG. 12. The entire system 50 can be adjusted (particularly for the purpose of installation and present requirements) Alignment of the plane formed by the exiting liquid jet) and installed accordingly.

As shown in FIG. 13, the system 50 includes the housing 38 and the device 10 for deflecting fluid flow inserted into the housing 38. For sealing the device 10 relative to the housing 38, the first sealing surface 28 has a surface contact with a first planar housing surface 52 of the housing 38 and the second sealing surface 30 has a surface contact with a second planar housing surface 54 of the housing 38. The second planar housing surface 54 extends over the entire device 10, so that it is closed in the state in which it is inserted into the housing 38, except for the first recess 22 and the second recess 24. As can also be seen from FIG. 13, a valve system 56 is provided on the housing 38, which comprises a check valve 66 with a valve holder 58 and a valve seal 60 bearing against a wall 68 of the housing 38. The check valve 66 is designed to produce a fluid-conducting connection between the fluid connection 48 and a fluid line shown in FIG. 9 when a predetermined fluid pressure is exceeded, this fluid line acting on a connection element 62 (see also FIGS. can be pushed under formation of a partial plastic deformation. On the housing 38 further holding elements 64 (see also Fig. 7) are formed, which are provided to the valve system 56 on the. To hold housing 38.

- Claims -

LIST OF REFERENCE NUMBERS

Device for deflecting a fluid flow longitudinal axis device

ground

floor area

wall

flow obstruction

first recess

second recess

outer surface

first sealing surface

second sealing surface

transverse axis

Face wall

wall side

casing

Recording housing

Longitudinal axis housing

strut

wall region

fluid port

System for deflecting a fluid flow first housing surface

second housing surface

valve system

valve holder

valve seal

connecting element

retaining element

check valve

wall

Claims

claims

Device (10) for deflecting a fluid flow, wherein the device (10) has a longitudinal axis (12) and a transverse axis (32) and in the direction of the longitudinal axis (12) in a housing (38) can be inserted, wherein the device (10) a bottom (14) having a bottom surface (16) and a wall (18) extending from the bottom surface (16), at least one flow obstruction (20) for deflecting the fluid flow being disposed on the bottom surface (16) (10) is open to a side opposite the bottom surface (16), and wherein the wall (18) has a first recess (22) for flowing in fluid and a second recess (24) for exiting the fluid after being deflected by the flow obstruction (20), wherein on one of the flow obstacle (20) facing away from the outer surface (26) of the wall (18) surrounding the first recess (22) planar first sealing surface (28) is provided, which is substantially normal to Längsa at least one second planar sealing surface (30) is formed on the wall (18) which is arranged substantially parallel to the longitudinal axis (12) and parallel to the transverse axis (32), wherein the device (10 ) for producing a planar contact of the first sealing surface (28) with a first planar housing surface (52) of the housing (38) and for producing a planar contact of the second sealing surface (30) with a second planar housing surface (54) of the housing (38). in the housing (38) in the direction of the longitudinal axis (12) can be inserted.

Device (10) according to claim 1, characterized in that the device (10) has two spaced-apart flow obstacles (20) which, together with the wall side (36) of the wall (18), which faces the flow obstacles (20) set are to let the incoming fluid in the form of a cyclically pivoting fluid jet from the second recess (24).

Device (10) according to claim 1 or 2, characterized in that the flow obstacle (20) has a height of the bottom surface (16), which corresponds to the of the bottom surface (16) dimensioning height of the wall (18).

4. Device (10) according to one of the preceding claims, characterized in that the device (10) is designed in the form of a one-piece injection-molded part.

5. Housing (38), wherein in the housing (38) is a device (10) according to one of claims 1 to 4 inserted, and wherein the housing (38) has a passage which is for forming a fluid-conducting connection between the first recess (22) of the device (10) and the surroundings of the housing (38) is provided when the device (10) in the housing (38) with surface contact between the first sealing surface (28) and the first housing surface (52) and surface contact between the second sealing surface (30) and the second housing surface (54) is inserted.

6. system (50) for deflecting a fluid flow, with a device (10) according to one of claims 1 to 4 and a housing (38) according to claim 5, in which the device (10), preferably against rotation, is inserted.

7. System (50) according to claim 6, characterized in that the device (10) in the housing (38) is clamped.

8. A windshield wiper system comprising a system (50) according to claim 6 or 7, wherein the system (50) is provided for deflecting a fluid flow in the form of a windshield wiper fluid flow.