CN218508569U

CN218508569U - Jet regulator

Info

Publication number: CN218508569U
Application number: CN202221357515.3U
Authority: CN
Inventors: M·滕佩尔; S-E·金
Original assignee: Neoperl GmbH
Current assignee: Neoperl GmbH
Priority date: 2021-12-20
Filing date: 2022-05-31
Publication date: 2023-02-21
Anticipated expiration: 2032-05-31
Also published as: CN116290242A; DE202021106933U1; WO2023118060A1

Abstract

The invention relates to a jet regulator comprising an acceleration unit (2) and a distribution unit (3), wherein the acceleration unit (2) has at least one nozzle (4) and an intermediate space (5) is formed between the acceleration unit (2) and the distribution unit (3), said jet regulator being provided in that the intermediate space (5) has a lateral extent that is smaller than the lateral extent of the distribution unit (3). Based on the utility model discloses a cavitation jet regulator can improve jet regulator's runnability and efflux picture.

Description

Jet regulator

Technical Field

The utility model relates to a jet regulator.

Background

Such jet regulators are known in practice.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the task on is, improves the runnability and the efflux map of efflux regulator. The object is achieved by advantageous features.

In order to solve the task, the utility model provides a following characteristic:

the jet regulator comprises an acceleration unit and a distribution unit, wherein the acceleration unit has at least one nozzle and an intermediate space is formed between the acceleration unit and the distribution unit, characterized in that the intermediate space has a lateral extent which is smaller than a lateral extent of the distribution unit.

In particular, it is therefore proposed according to the invention in order to solve the above-mentioned object in a jet regulator of the type mentioned at the outset that the intermediate space has a lateral extent which is smaller than a lateral extent of the distributor unit. A choking of the liquid, in particular water, can thus be produced in the jet regulator. The lateral extension of the intermediate space may for example be the maximum and/or minimum lateral extension of the intermediate space.

The lateral extent of the distribution unit can be characterized, for example, by the diameter or the like of the inflow and/or functionally effective area of the distribution unit.

In order to solve the stated object, the invention also provides an advantageous feature. In particular, according to the invention, in order to solve the above-mentioned object, a jet regulator of the type mentioned at the outset is provided which has a nozzle which has a narrowing section, a narrowing section and an expansion section in the course thereof in succession, for example in the flow direction, preferably directly following one another, and the length of the narrowing section is greater than the length of the narrowing section and the length of the expansion section is greater than the length of the narrowing section. It is therefore possible to efficiently form the fine bubbles generated by cavitation and introduce the fine bubbles into a liquid such as water.

For example, the lengths mentioned in the description can be measured in the main flow direction or in the intermediate flow direction and/or in the installation direction of the jet regulator.

For example, the constriction can be designed so short that the narrowing section and the expansion section merge virtually directly into one another. It can thus be easily achieved that cavitation bubbles reach the expansion section and can be separated there by water and flushed away.

The narrowing section can be characterized, for example, by a substantial reduction of the opening cross section in the flow direction or by an acceleration zone.

The expansion section can be characterized, for example, by a substantial increase in the opening cross section in the flow direction or by a deceleration zone.

The narrowing section can be characterized, for example, by forming a transition between the narrowing section and the expanding section and/or by forming a section with an opening cross section that remains essentially constant in the flow direction.

For example, the narrow region section may be characterized by a change in the cross section of the opening that is less than the thickness of the boundary layer of the flowing liquid at the wall in the section. It is thus possible to achieve that irregularities or variations in the opening cross section in the region of the narrow point have no or only a small effect on the flow behavior of the flow center. In other words, apart from such slight deviations, the narrowing section can be embodied constant in cross section.

In order to solve this task, the invention furthermore proposes advantageous features. In particular, according to the invention, in order to solve the above-mentioned object, a jet regulator of the type mentioned at the outset is provided, which has a nozzle, and which has a constriction section, an expansion section and a discharge section in the course thereof in succession, for example in the flow direction, preferably directly following one another, and the length of the expansion section is greater than the length of the constriction section. Therefore, the fine bubbles generated by the cavitation can be efficiently formed and introduced into the liquid. The venting section may be used to fluidly decouple the expanding section from a subsequent larger space (e.g., an intermediate space).

The discharge section may, for example, have a greater length than the expansion section.

The discharge section can be characterized, for example, in that it forms a section with an opening cross section which remains substantially constant along the directional flow.

For example, the discharge section may be characterized by an opening cross-section that varies less than the thickness of the boundary layer of flowing liquid at the wall of the section. It can thus be easily achieved that the discharge section is virtually constant for the flow behavior in the interior of the fluid.

In order to solve this task, the invention furthermore proposes advantageous features. In particular, it is therefore proposed according to the invention in order to solve the aforementioned problems in a jet regulator of the type mentioned at the outset that the jet regulator has an acceleration unit, wherein the acceleration unit has at least one nozzle which is configured asymmetrically, wherein the expansion in different circumferential sections is configured to a different extent along the circumference of the narrow section. Thereby, the negative pressure can be formed efficiently and reliably, and thus a state favorable to the cavitation can be achieved. It is thus possible to easily limit the generation of negative pressure to a defined circumferential section, so that the negative pressure remains locally concentrated. This makes bubble formation easier.

For example, the expansion is defined on a circumferential section, in particular a circumferential section of less than 180 °.

It should be noted that the features listed individually can be combined with one another in any technically meaningful manner and define further embodiments of the invention. Furthermore, the features specified are explained and illustrated in greater detail in the description, wherein a further preferred embodiment of the invention is formed.

Cavitation is the formation and dissolution of vapor-filled cavities (vapor bubbles) in a liquid

The configuration and formation of the cavity in the jet regulator is advantageous because it produces an aesthetically pleasing and regular jet pattern for the user. Smaller bubbles can be achieved compared to the already known air entrainment. It is thus possible to produce a jet whose mass is between the transparent mass of a laminar jet and the milky-white mass of an aerated jet.

In the present invention, cavitation is caused or influenced by the shape of the nozzle.

Advantageously, the nozzle comprises or has a narrowing section, a divergent section and a discharge section in its course in the flow direction.

In the narrowing section, the lateral extension of the nozzle in the flow direction decreases. In the narrow region, the lateral extent of the nozzle is minimized or minimized. In the expansion section, the lateral extent of the nozzle increases in the flow direction. The lateral extension of the nozzle can be greatest in the discharge section and/or constant within the nozzle and/or within the discharge section.

An intermediate space is defined at a terminal end of the discharge section.

In the narrowing section, the flow line of the liquid is narrowed and the liquid is thus accelerated. A negative pressure can then be generated in the region of the stenosis, wherein this negative pressure is at most equal to the vapor pressure of the liquid, for example water. The vapor pressure of water at 20 ℃ is approximately 0.023bar. Due to the negative pressure, micro-bubbles are formed in the narrow region by cavitation, which migrate along the nozzle in the flow direction. The size of the cavitated bubbles increases in the expanded section. In the discharge section, the cavitated gas bubbles detach from the walls of the nozzle and migrate into the liquid and further into the intermediate space, where they form micro-bubbles.

Due to the special shape of the intermediate space, it is also possible for a negative pressure to be generated in the intermediate space and for micro-bubbles to form, in particular in the upper region of the intermediate space, due to cavitation. This negative pressure in the intermediate space can also suck the previously mentioned micro-bubbles into the intermediate space. The negative pressure may also facilitate the separation of the cavities from the walls of the nozzle.

The terms "radial" and "axial" can relate to the installation direction of the jet regulator or to the longitudinal extent of the jet regulator in the flow direction. The term "lateral extension" may relate to a radial distance.

The term micro-bubbles is used for bubbles in the order of magnitude of the micrometer range or bubbles that can be made visible by microscopy and which are generated as a result of cavitation.

In an advantageous embodiment, it can be provided that the longitudinal extent of the intermediate space is at least twice the longitudinal extent of the at least one nozzle. Preferably, the longitudinal extension of the intermediate space is at least three times or 3.5 times or 3.7 times the longitudinal extension of the at least one nozzle. A choking of liquid, for example water, can thus be achieved in the intermediate space.

A choking of the liquid in the intermediate space is advantageous, since a separation by cavitation of the cavitating bubbles between the nozzle and the intermediate space is thereby more likely to occur.

In an advantageous embodiment, it can be provided that the intermediate space has a decoupling region with a lateral extent which is less than half the lateral extent of the dispensing unit. In the decoupling zone, a uniform mixing of the micro-bubbles with the choked flow of liquid takes place. This region of the intermediate space with the smallest diameter is considered as a decoupling zone.

In an advantageous embodiment, it can be provided that the intermediate space is conically tapered in the flow direction. Thereby achieving choking of the liquid and easier mixing with the micro-bubbles.

In an advantageous embodiment, it can be provided that the intermediate space is curved in a biconcave manner. A choking of the liquid can thus be achieved.

In an advantageous embodiment, it can be provided that the intermediate space is rotationally symmetrical with respect to the longitudinal axis of the jet regulator. A shape of the intermediate space that is advantageous for cavitation can thus be achieved.

In an advantageous embodiment, it can be provided that the cross section of the outflow side of the intermediate space is smaller than the cross section of the inflow side of the intermediate space. A choked flow of liquid close to the discharge section can thus be achieved.

In an advantageous embodiment, it can be provided that the angle between the wall of the intermediate space on the inflow side and the longitudinal axis of the jet regulator is not equal to 0 °. The separation of the micro-bubbles from the walls in the intermediate space can thus be achieved in an easy manner.

In an advantageous embodiment, it can be provided that a cavity is formed between the wall of the intermediate space and the housing wall. It is thus possible to flexibly and elastically form the walls of the intermediate space. Furthermore, the construction can thus be simplified, for example by injection molding techniques. Preferably, the cavity is circumferential on the radial side and forms a ring.

In an advantageous embodiment, it can be provided that the distribution unit has a lateral extent which is matched to a lateral extent of the downstream outlet structure. A choked flow (back flow of choked water) of the liquid in the dispensing unit can thus be achieved.

It is advantageous here if, taking into account the possibly inserted screen grating, the lateral extensions can be selected from one another such that a filling of the drainage structure with water is possible.

In an advantageous embodiment, it can be provided that the lateral extent of the constriction section is at least one third, in particular at least one half, of the lateral extent at the end of the expansion section and/or at the beginning of the narrowing section and/or is at most four fifths or 0.7 times the lateral extent at the end of the expansion section and/or at the beginning of the narrowing section. Therefore, fine bubbles can be formed due to cavitation. A value of 0.7 has been demonstrated in experiments/simulations as a preferred limit.

In an advantageous embodiment, it can be provided that the lateral extent at the beginning of the narrowing section is equal to the lateral extent at the end of the expansion section or differs from the lateral extent at the end of the expansion section by at most 50% or 35%. Therefore, the fine bubbles can be efficiently formed by cavitation.

In an advantageous embodiment, it can be provided that the length of the constriction section is less than 6 times, in particular less than 4 times or 10 times, the length of the constriction and/or expansion section. Therefore, the fine bubbles can be more easily formed in the narrow portion section due to cavitation. It can be said that a shorter stenosis region is required.

In an advantageous embodiment, it can be provided that the expansion section has a curved contour. Preferably, the curved contour is a circular or elliptical contour. The curved profile facilitates the enlargement of the cavitated bubbles and their separation from the wall and migration into the liquid.

In an advantageous embodiment, it can be provided that the narrowing section has a curved contour. Preferably, the curved contour is a circular or elliptical contour. The curved contour thus contributes to the acceleration of the liquid or to the narrowing of the fluid line.

In an advantageous embodiment, it can be provided that the distribution unit is a digester or has a digester plate. Congestion flow can thus be achieved at the distribution unit.

The resolver plate or resolver can fulfill two functions: the first is to homogenize the jet pattern and the flow, which consists of microbubbles and liquid, and the second is to act advantageously on the choked flow, which receives the microbubbles.

Choking is required in order to provide a liquid that can mix with the micro-bubbles generated by cavitation. An aesthetically pleasing and regular jet pattern for the user can thus be achieved.

In an advantageous embodiment, it can be provided that the dispensing unit has an opening. Preferably, the holes are nozzle-like, in particular the diameter of the holes is variable. Thereby providing a choked flow of liquid.

In an advantageous embodiment, it can be provided that the bore is conical. Thereby providing a choked flow of liquid.

In an advantageous embodiment, it can be provided that the diameter of the bore decreases in the flow direction. A choking of the liquid with the already mentioned advantages can thus be achieved.

In an advantageous embodiment, it can be provided that the lateral extent of the nozzle is variable, for example not constant, in the axial direction. Thus, the fluid line of the liquid can be modified such that a negative pressure is generated and thus micro-bubbles are generated by cavitation.

In an advantageous embodiment, it can be provided that the acceleration unit comprises a pre-sieve and a cavitation plate. It is thus possible to filter out dirt in the flow direction and to increase the speed of the flow. The cavitating plate has the already mentioned shape and thus facilitates the formation of micro-bubbles. The pre-screen may prevent the nozzles in the cavitating plate from being blocked or completely clogged by dirt.

In an advantageous embodiment, it can be provided that the cavitation plate has a thickening radially on the inside. Preferably, the thickening narrows the opening cross section of the nozzle. Improved acceleration of the fluid within the nozzle can thus be achieved.

In an advantageous embodiment, it can be provided that the thickening is formed alternately symmetrically to the connecting webs. Improved acceleration of the fluid within the nozzle can thus be achieved.

In an advantageous embodiment, it can be provided that the nozzle is annular. Preferably, the nozzles are not consecutive in the circumferential direction. It is thus possible to provide an effective and regular jet and positively influence the cavitation.

Preferably, the accelerating unit has an annular projection. The annular projection can be arranged radially on the inflow side and on the inside on the nozzle. The annular protrusion may cause acceleration of the fluid within the nozzle and narrowing of the fluid line.

The entirety of the narrowing section, the stenosis portion section and the expansion section may be referred to as an annular protrusion.

The housing of the jet regulator may preferably comprise a housing part and a mating housing part.

Advantageously, the nozzles are not consecutive in the circumferential direction. Thus providing localised acceleration within the nozzle.

A sieve grid may be provided at the outflow side of the dispensing unit. The screen grid is preferably provided in the mating housing part.

The distribution unit may break up the water jet into a plurality of partial jets.

The housing component may have an inner seat arrangement. Preferably, the seat arrangement receives a cavitation plate and additionally or alternatively a pre-screen.

Preferably, the dispensing unit is disposed between the housing component and the mating housing component.

The mating housing component has at least one screen grid. Preferably, a plurality of screen grates is provided. The mating housing component has a seat arrangement that can receive the one or more screen grates.

Preferably, the screen grid is made of plastic. The screen grid may also be made of a thermoplastic elastomer.

The angle between the wall of the intermediate space on the outflow side and the longitudinal axis of the jet regulator is 0 °. A homogenization of the flow in the end region of the intermediate space can thus be achieved.

The ratio of the opening cross section of the nozzle on the inflow side to the opening cross section of the intermediate space on the inflow side is less than 0.1. Therefore, the fine bubbles can be easily formed by the cavitation.

Preferably, the nozzle has in its course a narrowing section, a narrowing section and a diverging section in succession, the length of the narrowing section being greater than the length of the narrowing section and the length of the diverging section being greater than the length of the narrowing section.

Preferably, the nozzle has in its course a narrowing section, an expansion section and a discharge section in succession, and the length of the expansion section is greater than the length of the narrowing section.

Preferably, the nozzle is configured asymmetrically, wherein the expansion in different circumferential sections along the circumference of the constriction section is configured to different extents.

Preferably, the longitudinal extension of the intermediate space is at least twice the longitudinal extension of the at least one nozzle.

Preferably, the longitudinal extension of the intermediate space is at least three times or 3.5 times or 3.7 times the longitudinal extension of the at least one nozzle.

Preferably, the intermediate space has a decoupling zone having a lateral extension smaller than half the lateral extension of the dispensing unit.

Preferably, the intermediate space is conically tapered in the flow direction.

Preferably, the intermediate space is biconcave.

Preferably, the intermediate space is rotationally symmetrical with respect to the longitudinal axis of the jet regulator.

Preferably, the cross-section of the inflow side of the intermediate space is smaller than the cross-section of the outflow side of the intermediate space.

Preferably, the angle between the wall of the intermediate space on the inflow side and the longitudinal axis of the jet regulator is not equal to 0 °.

Preferably, a cavity is formed between the wall of the intermediate space and the housing wall.

Preferably, the distribution unit has a lateral extension coordinated with a lateral extension of the downstream discharge structure.

Preferably, the lateral extent of the stenosis site section is at least one third or one half of the lateral extent at the end of the expansion section and/or at the beginning of the narrowing section and/or is at most four fifths or 0.7 times the lateral extent at the end of the expansion section and/or at the beginning of the narrowing section.

Preferably, the lateral extension at the beginning of the narrowing section is equal to or differs from the lateral extension at the tip of the expanding section by at most 50% or 35%.

Preferably, the length of the stenosis site section is less than 6 or 4 or 10% of the length of the narrowing section and/or the dilating section.

Preferably, the expansion section has a curved profile.

Preferably, the expansion section has a round or oval section-shaped contour.

Preferably, the narrowing section has a curved profile.

Preferably, the narrowing section has a circular or elliptical section profile.

Preferably, the distribution unit is a digester and/or has a digester plate.

Preferably, the dispensing unit has a nozzle-like aperture.

Preferably, the aperture is conically shaped.

Preferably, the diameter of the holes decreases in the direction of flow.

Preferably, the lateral extension of the nozzle is variable in the axial direction.

Preferably, the lateral extension of the nozzle is not constant in the axial direction.

Preferably, the acceleration unit comprises a pre-screen and a cavitation plate.

Preferably, the cavitation plate has a thickening radially on the inside.

Preferably, the thickening narrows the opening cross section of the nozzle.

Preferably, the thickened portions and the connecting webs are alternately of symmetrical design.

Preferably, the nozzle is annular in configuration.

Drawings

The invention will now be described in more detail by means of a few examples, without however being limited to these. Further variants and embodiments of the invention result from the combination of individual or several features with one another and/or with individual or several features of the embodiments and/or of the variants of the device according to the invention described above.

In the drawings:

figure 1 shows a cross-sectional view of a jet regulator according to the invention,

figure 2 shows a perspective cross-sectional view of the jet regulator of figure 1,

figure 3 shows an exploded view of the jet regulator of figure 1,

FIG. 4 shows a full view (a), a detail view (b) and a perspective view (c) of the cavitation plate from above,

figure 5 shows a full view and a detail view from below of the cavitation plate,

FIG. 6 shows a detail view of the acceleration unit, an

Figure 7 shows a detail view of the nozzle of figure 6,

figure 8 shows a perspective view of the dispensing unit,

figure 9 shows a cross-sectional view through a cavitation plate,

figure 10 shows a further cross-sectional view of the cavitation plate,

fig. 11 shows additional cross-sectional and detail views of the cavitation plate.

Detailed Description

In the following description of the different embodiments of the invention, elements that are identical in terms of their function are also provided with identical reference numerals in the case of different designs or models.

For a better overview, not all reference numerals are provided in the figures, although elements may well be present in the figures. However, the same reference numerals indicate functionally and/or structurally identical components and functional units.

Fig. 1 shows a sectional view of a jet regulator 1 according to the invention.

The jet regulator 1 has a housing which comprises a housing part 12 and a mating housing part 13. A dispensing unit 3 is formed between the housing part 12 and the mating housing part 13. The distributor unit 3 is configured in fig. 1 as a splitter plate 14. The dispensing unit 3 may alternatively also be designed as a splitter. The splitter plate 14 has conically formed bores 19. The diameter of the holes 19 decreases in the direction of flow. The jet regulator 1 also has an acceleration unit 2. The acceleration unit comprises a pre-screen 10 and a cavitation plate 11.

The flow direction (main flow or intermediate flow) extends downwards in fig. 1 from the front screen 10.

The cavitation plate 11 has at least one nozzle 4. The nozzle 4 is configured asymmetrically, wherein the expansion in different circumferential sections is configured to a different extent along the circumference of the constriction section. Fig. 4 shows that the nozzle is configured non-circularly. The nozzle 4 is divided into four sections in the flow direction (see fig. 7): a narrowing section 6, a stenosis portion section 7, an expansion section 8, and a discharge section 9. The lateral extent in the narrowing section 6 decreases in the flow direction. The lateral extension in the narrow region 7 is minimal. The lateral extent in the expansion section 8 increases in the flow direction. The lateral extent in the discharge section 9 is greatest and remains constant in the flow direction.

For example, the narrow spot section 7 may be characterized by a change in the opening cross section that is less than the thickness of the boundary layer of the flowing liquid at the wall in that section.

The length of the narrowing section 6 is greater than the length of the stenosis section 7 and the length of the dilating section 8 is greater than the length of the stenosis section 7. The length of the narrowing section 6 and the length of the expanding section 8 are equal or differ by a maximum of 10%.

For example, the discharge section 9 may be characterized by a change in the opening cross-section that is less than the thickness of the boundary layer of the flowing liquid at the wall in that section.

The jet regulator 1 furthermore has an intermediate space 5, which is arranged between the acceleration unit 2 and the distributor unit 3. The maximum lateral extension 26 is coordinated with the position of the nozzle 4. The intermediate space 5 has a biconcave curvature. The longitudinal extension of the intermediate space 5 is at least twice as large, preferably at least five times as large, as the longitudinal extension of the at least one nozzle 4. The intermediate space 5 furthermore has a decoupling zone 24, which defines a minimum lateral extent 25 of the intermediate space and is less than half the lateral extent 27 of the dispensing unit 3.

The lateral extent 27 of the distributor unit is characterized here by the diameter of the inflow and/or functionally effective surface 28 of the distributor unit 3.

The decoupling zone 24 is the part of the intermediate space 5 having the smallest diameter. The intermediate space 5 is conically tapered in the flow direction. The intermediate space 5 is rotationally symmetrical with respect to the longitudinal axis 21 of the jet regulator 1. The cross-section of the inflow side of the intermediate space 5 is smaller than the cross-section of the outflow side of the intermediate space 5. The angle between the wall of the intermediate space 5 on the inflow side and the longitudinal axis 21 of the jet regulator 1 is not equal to 0 °. The separation of the cavitated bubbles leaving the nozzle from the wall can thus be improved. The angle between the wall of the intermediate space 5 on the outflow side and the longitudinal axis 21 of the jet regulator 1 is equal to 0 °. A choking of the liquid in the intermediate space 5 of the jet regulator 1 can thus be achieved. The choked flow here helps to provide a liquid which is able to accommodate the micro-bubbles generated by cavitation.

Furthermore, a cavity 17 is formed between the wall of the intermediate space 5 and a housing wall 18. Said cavity 17 ensures that the walls of the intermediate space 5 can be elastically deformed. By means of the cavity 17, the construction or production of the housing part 12 is simplified by means of injection molding or the like. The hollow space 17 is formed circumferentially in a circumferential orientation and forms a ring or circular ring.

The housing part 12 has a seat arrangement which can receive the cavitation plate 11 and the pre-screen 10. The dispensing unit 3 has a lateral extension which is coordinated with the lateral extension of the downstream discharge structure 22.

The lateral extent of the stenosis region section 7 is at least one third of the lateral extent at the end of the expansion section 8 and/or at the beginning of the narrowing section 6. The terms "starting portion" and "end portion" can relate to the installation direction of the jet regulator 1 or to the flow direction.

The lateral extension at the beginning of the narrowing section 6 is equal to or differs by at most 10% from the lateral extension at the end of the expanding section 8.

The length of the stenosis region 7 is less than 10% of the length of the narrowing section 6 and/or the dilating section 8. Thus, the length of the stenosis section 7 is relatively small compared to the length of the narrowing section 6 and/or the dilating section 8.

The narrowing section 6 is mirror-symmetrical to the expanding section 8, wherein the axis of symmetry is delimited by the narrowing section 7.

The expansion section 8 has a curved profile. Preferably, the contour is in the form of a circular segment or an elliptical segment.

The narrowing section 6 has a curved profile. Preferably, the contour is in the form of a circular segment or an oval segment.

The curved profiles contribute to the formation, enlargement and separation of cavitated bubbles.

The dispensing unit 3 has a preferably nozzle-like aperture 19. The bore 19 is preferably conically formed, wherein the diameter of the bore 19 decreases in the flow direction. The shape of the holes 19 here contributes to the creation of a turbulent flow of the liquid in the intermediate space 5, which contributes to the separation of the micro-bubbles and their admission into the liquid.

The lateral extension of the nozzle 4 is variable, in particular not constant, in the axial direction. The lateral extension is constant only in the discharge section 9.

The cavitation plate 11 has a thickening 20 in the radial direction on the inside, which narrows the opening cross section of the nozzle 4. In the example, the thickening 20 extends axially, i.e. for example in the flow direction and/or in the installation direction of the jet regulator 1.

The thickened portions 20 are alternately of symmetrical design with the connecting webs 29. Thus, an improved acceleration of the fluid in the nozzle 4 may be achieved.

The nozzle 4 is annular in design, but is not continuous in the circumferential direction, since the thickened region 20 forms an obstacle.

On the outflow side of the distribution unit 3, sieve screens 15, 16 are arranged. The

screen grids

15, 16 are arranged in the mating housing 13. On the outflow side of the screen grates 15, 16, a discharge structure 22 is provided. The mating housing part 13 has a seat arrangement which can receive the screen grates 15, 16. The

screen grids

15, 16 are preferably made of plastic or of thermoplastic elastomer.

The cavitation plate 11 has on the inside in the radial direction thickened portions 20 which are alternately of symmetrical design with the connecting webs 29. The thickening 20 narrows the clear opening cross section of the nozzle 4 and ensures, in particular, an acceleration of the fluid in the nozzle.

Fig. 2 shows a perspective sectional view of the jet regulator 1 from fig. 1. The description in fig. 1 correspondingly applies also in fig. 2.

Fig. 3 shows an exploded view of the jet regulator 1 from fig. 1. The jet regulator 1 has a housing part 12 and a mating housing part 13. The housing part 12 has a circumferential ring-shaped portion, which forms a cavity 17. The housing member 12 has a seat arrangement that can receive the pre-screen 10 and the cavitation plate 11. The housing part 12 has an intermediate space 5 on the inside. The mating housing part 13 may receive one or more screen grates 14, 15. A resolver plate 14 is provided between the housing part 12 and the mating housing part 13. The splitter plate 14 is here part of the distribution unit 3. The decomposer plate 14 has holes 19 preferably in the shape of nozzles. The mating housing part 13 has a discharge structure 22 on the outflow side.

Fig. 4 shows a full view, a detail view and a perspective view of the cavitation plate 11 from above. "from above" in this connection means on the inflow side. The cavitation plate 11 has a surrounding annular projection 23.

In each nozzle 4, said annular projection 23 occupies a circumferential sector of less than 180 °. Thus, the expansion formed behind the annular projection 23 in the flow direction is defined in the circumferential direction. The lateral definition of the nozzle 4 is stepless over the remaining circumferential sections, so that the expansion is of weaker design here, i.e. is completely absent in the boundary case.

The annular projection 23 divides the nozzle 4 into four sections in the axial direction: a narrowing section 6, a stenosis section 7, an expansion section 8 and a discharge section 9 (not shown here). The cavitation plate 11 has a thickened portion 20 which projects into the nozzle 4. The thickened portions 20 are alternately of symmetrical design with the connecting webs 29. The thickening 20 narrows the cross section of the at least one nozzle 4. The purpose of the thickening is to modify the flow path so that a negative pressure can be generated in the nozzle 4, which negative pressure is favorable for cavitation formation. The nozzles 4 are of annular design, but the nozzles 4 are of discontinuous design in the circumferential direction, since the sharp-edged thickenings 20 of the cavitation plate 11 form one or more obstacles.

Fig. 5 shows a full view and a detail view of the cavitation plate 11 from below. "from below" means in this connection the outflow side. The cavitation plate 11 has a circumferential annular projection 23, which annular projection 23 divides the nozzle 4 into four sections in the axial direction: a narrowing section 6, a stenosis section 7, an expansion section 8 and a discharge section 9 (not shown here). The cavitation plate 11 has a thickened portion 20 which projects into the nozzle 4. The nozzle 4 is of annular design, but the nozzle 4 is not continuous in the circumferential direction, since the thickened region 20 forms an obstacle. The clear opening cross section of the nozzle 4 is reduced by the thickening.

Fig. 6 shows a detailed view of the acceleration unit 2. The acceleration unit 2 comprises a pre-screen 10 and a cavitation plate 11. The purpose of the pre-screen 10 is to filter out dirt in the fluid and prevent clogging of the cavitation plate 11. The cavitation plate 11 is intended to generate fine bubbles by the cavitation principle. This is achieved by the special shape of the nozzle 4. In the flow direction, the nozzle has four sequential segments: a narrowing section 6, a stenosis portion section 7, a dilation section 8, and a discharge section 9. The narrowing section 6, the narrowing section 7 and the widening section 8 can be referred to as an annular projection 23, which is arranged radially on the inflow side on the nozzle 4 and extends along the circumference. By means of the annular projection 23, a narrowing of the fluid line and an acceleration of the flow take place in the nozzle 4.

Fig. 7 shows a detail view of the nozzle 4 of fig. 6. The nozzle 4 has four sections in sequence: a narrowing section 6, a stenosis portion section 7, an expansion section 8, and a discharge section 9. An annular projection 23 is formed on the cavitation plate 11 radially on the inside in a circumferential manner. The discharge section 9 opens out into the intermediate space 5 on the outflow side. On the inflow side, the angle between the wall of the intermediate space 5 and the longitudinal axis 21 of the jet regulator 1 is not equal to 0 °. Therefore, the fine bubbles can be formed relatively easily.

Fig. 8 shows a perspective view of the dispensing unit 3. The distribution unit 3 is designed here as a splitter plate 14. The lateral extent 27 of the distributor unit 3 can be characterized, for example, by the diameter or the like of the inflowing and/or functionally effective surface 28 of the distributor unit 3. The distribution unit 3 has a regular arrangement of holes 19. The bore 19 is conical in shape, with a diameter decreasing in the flow direction.

Fig. 9 and 10 show cross-sectional views of the cavitation plate 11. Adjacent to the nozzle 4, a symmetrical arrangement of the thickening 20 and the connecting webs 29 is visible. The nozzle 4 is annular, but not continuous in the circumferential direction on the inflow side and on the outflow side. The special arrangement and shaping between the nozzle 4, the thickening 20 and the connecting web 29 contributes to the formation of cavitated bubbles. The annular projection 23 is formed radially and circumferentially on the inside. The connecting webs 29 ensure that the nozzles 4 are not continuous in the circumferential direction. The narrowing section 6 and the expanding section 8 have a curved profile. In the specific case, the contour is a circle segment-shaped contour, so that the curved contours of the narrowing section 6 and of the widening section 8 are mirror-symmetrical with respect to the narrow-spot section 7. The length of the stenosis portion 7 may also be zero or very short.

Fig. 11 shows a further sectional view and a further detail view through the cavitation plate 11. The nozzle 4 is divided into the sections 6-9 already mentioned. The narrowing section 6 and the expanding section 8 have a curved profile. In the specific case, the curved contour is an oval segment-shaped contour, which results in the narrowing section 6 and the widening section 8 no longer being mirror-symmetrical with respect to the stenosis region section 7. The annular projection 23 is formed radially and circumferentially on the inside. The length of the stricture section 7 is shorter than the length of the narrowing section 6 and the length of the dilating section 8. In the specific case, the length of the discharge section 9 is at its maximum. The discharge section is characterized in that the lateral extension of the discharge section 9 is constant.

The jet regulator 1 comprises an acceleration unit 2 and a distributor unit 3, wherein the acceleration unit 2 has at least one nozzle 4 and an intermediate space 5 is formed between the acceleration unit 2 and the distributor unit 3, it being provided in the jet regulator that the intermediate space 5 has a lateral extent which is smaller than a lateral extent of the distributor unit 3.

List of reference numerals

1. Jet regulator

2. Acceleration unit

3. Dispensing unit

4. Nozzle with a nozzle body

5. Intermediate space

6. Narrowing section

7. Segment of narrow part

8. Expansion segment

9. Discharge section

10. Front sieve

11. Cavitation plate

12. Housing component

13. Mating housing component

14. Resolver plate

15. Screen grating

16. Additional screen grid

17. Hollow cavity

18. Housing wall

19. Hole(s)

20. Thickened part

21. Longitudinal axis

22. Discharge structure

23. Annular boss

24. Decoupling zone

25. (minimum) lateral extension of the intermediate space

26. (maximum) lateral extension of the intermediate space

27. Lateral extension of the dispensing unit

28. The surface to be flowed in

29. Connecting tab

Claims

1. Jet regulator comprising an acceleration unit (2) and a distribution unit (3), wherein the acceleration unit (2) has at least one nozzle (4) and an intermediate space (5) is formed between the acceleration unit (2) and the distribution unit (3), characterized in that the intermediate space (5) has a lateral extension which is smaller than the lateral extension of the distribution unit (3).

2. Jet regulator according to claim 1, characterized in that the nozzle (4) has in its course a narrowing section (6), a narrow region section (7) and a diverging section (8) in sequence, the length of the narrowing section (6) being greater than the length of the narrow region section (7) and the length of the diverging section (8) being greater than the length of the narrow region section (7).

3. Jet regulator according to claim 1, characterized in that the nozzle (4) has in its course a narrow section (7), a divergent section (8) and a discharge section (9) in sequence, and the length of the divergent section (8) is greater than the length of the narrow section (7).

4. Jet regulator according to claim 2 or 3, characterized in that the nozzles (4) are asymmetrically configured, wherein the expansion in different circumferential sections along the circumference of the constriction section (7) is configured to different extents.

5. Jet regulator according to claim 1 or 2, characterized in that the longitudinal extension of the intermediate space (5) is at least twice the longitudinal extension of the at least one nozzle (4).

6. Jet regulator according to claim 5, characterized in that the longitudinal extension of the intermediate space (5) is at least three times or 3.5 times or 3.7 times the longitudinal extension of the at least one nozzle (4).

7. Jet regulator according to claim 1 or 2, characterized in that the intermediate space (5) has a decoupling zone (24) having a lateral extension smaller than half the lateral extension of the distribution unit (3).

8. Jet regulator according to claim 1 or 2, characterized in that the intermediate space (5) is conically tapered in the flow direction.

9. Jet regulator according to claim 1 or 2, characterized in that the intermediate space (5) is biconcave arched.

10. Jet regulator according to claim 1 or 2, characterized in that the intermediate space (5) is rotationally symmetrical with respect to the longitudinal axis (21) of the jet regulator (1).

11. Jet regulator according to claim 1 or 2, characterized in that the cross section of the inflow side of the intermediate space (5) is smaller than the cross section of the outflow side of the intermediate space (5).

12. Jet regulator according to claim 1 or 2, characterized in that the angle between the wall of the intermediate space (5) on the inflow side and the longitudinal axis (21) of the jet regulator (1) is not equal to 0 °.

13. Jet regulator according to claim 1 or 2, characterized in that a cavity (17) is formed between the wall of the intermediate space (5) and a housing wall (18).

14. Jet regulator according to claim 1 or 2, characterized in that the distribution unit (3) has a lateral extension coordinated with the lateral extension of the downstream discharge structure (22).

15. Jet regulator according to claim 2, characterized in that the lateral extension of the constriction region (7) is at least one third or one half of the lateral extension at the end of the expansion section (8) and/or at the beginning of the narrowing section (6) and/or is at most four fifths or 0.7 times the lateral extension at the end of the expansion section and/or at the beginning of the narrowing section.

16. Jet regulator according to claim 2, characterized in that the lateral extension at the beginning of the narrowing section (6) is equal to or differs from the lateral extension at the end of the expanding section (8) by at most 50% or 35%.

17. Jet regulator according to claim 2 or 3, characterized in that the length of the narrow region section (7) is less than 6 times or 4 times or 10% of the length of the narrowing section (6) and/or of the expanding section (8).

18. Jet regulator according to claim 2 or 3, characterized in that the expansion section (8) has a curved profile.

19. Jet regulator according to claim 18, characterized in that the expansion section (8) has a circular or elliptical segment-shaped profile.

20. Jet regulator according to claim 2, characterized in that the narrowing section (6) has a curved profile.

21. Jet regulator according to claim 20, characterized in that the narrowing section (6) has a circular or elliptical section profile.

22. Jet regulator according to claim 1 or 2, characterized in that the distribution unit (3) is a resolver and/or has a resolver plate (14).

23. Jet regulator according to claim 1 or 2, characterized in that the distribution unit (3) has nozzle-like holes (19).

24. Jet regulator according to claim 23, characterized in that the holes (19) are conically shaped.

25. Jet regulator according to claim 23, characterized in that the diameter of the holes (19) decreases in the flow direction.

26. Jet regulator according to claim 1 or 2, characterized in that the lateral extension of the nozzle (4) is variable in the axial direction.

27. Jet regulator according to claim 26, characterized in that the lateral extension of the nozzle (4) is not constant in the axial direction.

28. Jet regulator according to claim 1 or 2, characterized in that the acceleration unit (2) comprises a pre-screen (10) and a cavitation plate (11).

29. Jet regulator according to claim 28, characterized in that the cavitation plate (11) has a thickening (20) radially on the inside.

30. Jet regulator according to claim 29, characterized in that said thickening narrows the opening cross section of the nozzle (4).

31. Jet regulator according to claim 29, characterized in that the thickenings (20) and the connecting webs (29) are alternately of symmetrical construction.

32. Jet regulator according to claim 1 or 2, characterized in that the nozzle (4) is configured as an annulus.