DE102009057559B4 - Flow controllers for sanitary applications and methods for designing such flow regulators - Google Patents

Abstract

Flow regulator for sanitary applications with a housing having an annular gap-like passage opening, further arranged with an annular gap close, elastic throttle body which changes the annular gap or portions thereof due to elastic deformation at forming pressure differences of the flowing medium, wherein the annular gap has a profiling and the elastic throttle body with its downstream surface on a support shoulder, which is part of the housing, supported, characterized in that on the inflow side for axially fixing the elastic throttle body, a retaining ring or a retaining bead are provided, viewed from the inflow side of the retaining ring or Haltewulst the projected upstream side surface of the throttle body substantially only to a maximum of one-third covered, so that the flow pressure of the flowing medium attacks sufficiently on the throttle body and discontinuous keitsstellen in the control curve to be avoided, the symmetrical profiling of the annular gap is realized by means of a regulator contour of a central core, wherein the central core, connected via radial webs with the retaining ring or the retaining bead, an integral part, which inserts into the housing or einpressbar and the central core has a conical shape.

Description

The invention relates to a flow regulator for sanitary applications with a housing having an annular gap-like through hole, further arranged with an annular gap close, elastic throttle body which changes the annular gap or portions thereof due to elastic deformation at pressure differences forming the flowing medium, wherein the annular gap a Having profiling and the elastic throttle body with its downstream surface on a support shoulder, which is part of the housing, supported, according to the preamble of patent claim 1, and a method for designing the symmetrical profiling of an annular gap for flow rate regulator.

From the Russian patent RU 416972 a liquid quantity regulator or regulator is previously known.

This previously known volume regulator, which is also in the DE 20 60 751 A or the DE 21 31 117 A is explained, has an elastically deformable ring which, depending on the overpressure, which acts on the flow of the liquid to be controlled on the ring, an existing passage, which is formed as an annular gap narrows. According to the aforementioned prior art, a profiled core is assigned to the elastic ring, wherein the profile forms passage openings for regulating the fluid flowing through.

The known controller is designed such that an elastic ring surrounds a corrugated profiled core or rests on a ring provided with radially arranged ring. Depending on the prevailing before and behind the wave-shaped passage openings differential pressure conditions, a constriction, so that a regulation of the liquid flowing through occurs.

At the bottom of the wave-shaped passage openings, in which the elastic ring is pressed in accordance with the fluid pressure, support cams are present. These support cams are about half to a quarter as high as the total depth of the passage openings. With the support cams, it is possible to prevent a wide deflection and thus a permanent deformation of the elastic ring at high differential pressures. Also should be possible by a corresponding design of the support cams a good regulation into high pressure ranges. In one embodiment, it is stated that instead of the core, an inner wall of the housing can also be profiled. To secure the elastic throttle body in the form of a so-called O-ring, a cover cross is present, which is connected via a threaded sleeve with a further housing part in combination, which has the core and a support shoulder for the elastic ring.

According to the DE 21 31 117 A as well as the FR 2 117 611 A5 is a fluid flow regulator with elastically deformable ring, which is supported on a flat sealing surface, be developed by the fact that the sealing surfaces are provided for the elastic ring with a number of trough-shaped depressions. These depressions should increase the pressure inlet curve steeper and reach the control amount even at lower pressure. Specifically, in a preferred embodiment, the sealing surfaces for the elastic ring in the direction of the profiled core with a pitch of 10 ° to 15 ° are formed. By this measure is to be effected, that with decreasing form of the elastic ring can return more easily than in known embodiments in the starting position.

Summarized at this point, volume regulators for liquids are known whose function is based on a ring made of elastic material and its interaction with a centrally arranged profiled core.

Usually, the controller is designed so that the elastic O-ring radially surrounds the profiled core, is compressed during operation of the pressure generated before and after the controller differential pressure to a certain degree and thereby partially penetrates into the core profile, whereby the flow area is reduced depending on pressure and In this way, a constant control of the flow is achieved at local and / or time-dependent pressure. The known regulators work without external energy.

In order to implement the desired control behavior constructively, a very complex, strongly empirically supported development is required. Reference is made in this respect to the DE 33 02 759 C1 or the EP 0 115 342 A1 ,

The manual grinding of individual local core geometries shown there results in a complicated final geometry, which is difficult to reproduce using CAD (computer-aided design) and therefore can only be reproduced industrially at great expense.

It has also been shown that previously known retaining rings or crosses for the elastic throttle body cover more than two-thirds of Drosselkörper- or annular surface, in order to keep this safe even when Druckrichtungs- or flow direction change.

In this case, a disadvantage arises such that the flow pressure acts only on a small part of the surface of the elastic throttle body, whereby the throttle body can hardly be brought to elastic deformation at low flow pressure and thus does not come in regulating contact with the structured or profiled core. The result is flow characteristics with an uneven course, ie with a strong local maximum flow in the pressure range around 1 bar, which is often referred to in industrial practice as undesirable overshoot.

An improvement of the control behavior, however, accompanied by an increased design effort, succeeds according to the solution EP 1 933 217 A1 , The local flow regulator for sanitary purposes comprises a housing body which has at least one passage opening which is delimited by an aperture part lying in the inflow direction, an annular gap remaining between the aperture part and the passage opening. Furthermore, an elastic throttle body arranged in the vicinity of the annular gap is present, which changes the annular gap due to the deformation of the throttle body when pressure differences of the flowing medium are formed. According to the teaching there at least portions or parts of the diaphragm part perform a dependent of the pressure of the flowing medium relative movement or reversible deformation in the direction of the annular gap to influence the annular gap cross-sectional area such that the course of the pressure-flow rate characteristic of the regulator to a variety of supply and pressure conditions is adjusted.

From the DE 24 03 084 A1 For example, a liquid flow regulator with noise attenuator is known. The noise attenuator is formed of elastically deformable material and downstream of the liquid flow regulator. The cup-shaped noise attenuation member has at its bottom a baffle plate which limits the calming space between the liquid flow regulator and the bottom of the noise attenuator in the flow direction. Around the baffle are located on the regular amount of water matched outlet openings through which flows the regulated amount of water without disturbing demolition noise.

From the foregoing, it is therefore an object of the invention to provide an advanced flow regulator for sanitary applications, which can be easily and inexpensively manufactured on the one hand and on the other hand has excellent pressure control properties and in particular avoids overshoot.

Another object of the invention is to provide a method for producing a flow regulator for sanitary applications with annular gap-like passage opening and in a method for designing the symmetrical profiling of the annular gap for flow rate regulator, with the help of which it is possible to reduce manufacturing costs and high manufacturing quality and thus ensuring quality of the final product.

The object of the invention is initially achieved by a flow regulator for sanitary applications with a housing having an annular gap-like passage opening, according to the combination of features according to claim 1 or 11.

The method, the solution of the problem with respect to the interpretation of the symmetrical profiling of the annular gap for flow rate regulator according to the teaching of claim 12.

The method for producing a flow rate regulator is encompassed by the teaching of claim 13, wherein the dependent claims represent at least expedient refinements and developments.

It is therefore assumed that a flow regulator for sanitary applications with a housing having an annular gap-like passage opening. Furthermore, arranged in an annular gap, elastic throttle body, in particular a so-called O-ring is present, which changes the annular gap or portions thereof due to elastic deformation at forming pressure differences of the flowing medium, wherein the annular gap has a symmetrical profiling and the elastic throttle body with his downstream surface on a support shoulder, which is preferably part of the housing supported.

According to the invention, a retaining ring or a retaining bead is provided on the inflow side for axially fixing the elastic throttle body, the retaining ring or the retaining bead substantially only covering the projected inflow-side surface of the throttle body up to a third of the inflow side. As a result, the flow pressure of the flowing medium attacks sufficiently effectively on the pressure body and discontinuities in the control characteristic are avoided.

According to the invention, the symmetrical profiling of the annular gap is realized by means of a regulator contour of a central core, wherein the central core, connected to the retaining ring or the retaining bead via radial webs, forms an integral part which can be inserted into the housing, in particular pressed in.

On the housing, a circumferential inner collar is provided, which supports and fixes the retaining ring or the retaining bead with the central core. The connection between retaining ring or retaining bead and housing can be done by pressing, ie by adhesion, but also by positive engagement and / or material connection.

The central core has a conical shape. The taper extends here from the upstream end to the downstream end of the overall arrangement.

According to a further aspect of the invention, the support shoulder of the flow rate regulator is designed to be extended to the longitudinal axis or to the center of the regulator in order to achieve increased support of the throttle body, in particular under very high pressure load.

Furthermore, the housing can have a peripheral groove or segment-like recesses for supporting and receiving a corresponding section of the elastic throttle body in the event of severe pressure-induced deformation.

For the purpose of improving the sealing when installing the flow rate regulator in a sleeve or when inserting into a bore of a fitting, the housing has at least one end portion on the outer peripheral side a conical or conical ring portion.

In a second embodiment of the invention, the symmetrical profiling of the annular gap is realized by means of a regulator contour, which extends over the inner circumferential surface or inside of the ring-shaped, preferably sleeve-shaped housing part facing.

The encircling groove is again introduced here in protruding sections of the regulator contour.

In one embodiment of the flow rate regulator according to the invention, retaining tabs extend from a core part of an integrally formed housing in the inflow direction, wherein the free ends of the retaining tabs in the direction of annular gap have a bend or fold or run in such a way that the slipped over elastic throttle body is secured and guided.

As already mentioned, the housing may have a sleeve or cylindrical shape, wherein the outer diameter may correspond to the inner diameter of an adapter, which in turn carries an outer or an inner thread and the between fitting and z. B. a shower hose can be screwed.

In a complementary inventive approach, the housing or the housing parts on the flow rate and / or the properties of the elastic throttle body representing color coding, so that an easy assignment in the planned use of the flow regulator also by the layman is possible and thereby the advantages of the flow regulator in Energy savings, water savings and thus CO ₂ reduction are effective, as well as the benefits of using flow controllers within public utilities, where widespread use serves as an investment protection and equal supply to consumers.

In the method for the design of the symmetrical profiling of an annular gap for flow rate regulator according to the above-described type, the elastic properties given on average from an existing batch of elastic throttle bodies, in particular embodied as O-rings, are determined. This can be done by known measuring and test methods.

The determined values of the respective batch are stored using a data processing system.

Taking into account the stored elasticity values and the respectively desired volume flow rate curve curve, those product-specific regulator outlines are selected from a database which, in combination with the respective throttle body charge, realize the targeted flow rate control curve.

Furthermore, the geometric data of the selected controller contour determine the respective injection mold. Alternatively, by means of the geometric data from an amount of housings held in stock or in the form of annular housing-defining housing parts, that subset can be provided for completion with the respective charge of the throttle body, which results in the desired flow regulator passage curve.

In the method for producing a flow rate regulator, which has been explained above according to an embodiment, the throttle body is slipped over the annularly arranged retaining tabs. Subsequently, end portions of the retaining tabs are radially outwardly formed using a stamp-like tool, whereby the desired assurance of the elastic throttle body is given.

In an alternative to an axial fixation of the elastic throttle body, the O- Ring can be secured axially with a retaining bead, which also arises either by forming a cylindrical collar or by forced removal or corresponding impression of an undercut via a split injection mold can arise.

The invention will be explained below with reference to exemplary embodiments and with the aid of figures.

Hereby show:

1a a longitudinal sectional view of the flow rate regulator according to the first embodiment;

1b a perspective view of the flow regulator according to the first embodiment;

1c a cross section along in 1a shown line of the first embodiment of the flow rate controller;

2 a typical application of a flow regulator in the sanitary area, namely within an adapter connected to a shower spout in the connection area to a shower hose;

3a a longitudinal section of the flow regulator according to the second embodiment;

3b a partially cutaway perspective view of the second embodiment of the flow rate regulator;

3c a cross section along in 3a shown second embodiment of the flow rate regulator;

4a a longitudinal section of a development of the second embodiment of the flow regulator with guide groove at low pressure load of the throttle body;

4b a representation similar to that after 4a , but at higher pressure load or pressure force on the elastic throttle body, which is now stored supporting in the additional annular groove;

4c a partially broken specific representation of the development of the second embodiment of the flow rate controller;

5a a longitudinal section through a flow regulator according to the second embodiment with additional attachment strainer;

5b a perspective, partially broken view of the embodiment according to 5a ;

5c a cross section of the embodiment of the flow regulator with attachment strainer along the in 5a represented line;

6 Flow curves of the flow controller, wherein the thicker illustrated curve for the flow rate regulator according to the invention representative and the curve shown with a thinner line corresponds to that given in flow regulators of the prior art;

7a to f different embodiments of each symmetrical controller profiles, with which the flow of the flow regulator can be adapted to both the operating pressure and the respective properties of the throttle body;

8a and b are fragmentary perspective views of the flow rate regulators according to the invention with typical flow rates and tabulated related color coding of the housings or parts of the housing ( 8b );

9a , b and c depicting the procedural sequence in methods for producing flow rate regulators according to the second embodiment of the invention with slipping over the throttle body over the retaining tabs and subsequent deformation of end-side portions of the retaining tabs radially outward by means of a tool ( 9b ), the final state in 9c is shown;

10a and b is a cross-sectional view and a partially broken-away perspective view of another embodiment of a flow rate regulator with inflow-side retaining bead;

11a and b is a cross-sectional view and a partially broken away perspective view of a first embodiment of a flow rate regulator according to the invention, completed with attachment strainer, ventilation and beam-influencing means and

12a and b is a cross-sectional view and a perspective, partially broken away view of a second embodiment of an attachment screen and jet-forming means Completed flow regulator, where in the 11a and 11b such as 12a and 12b a pulled-out detail is shown with recognizable retaining ring or retaining bead.

In the case of the flow rate regulators for sanitary applications shown in the figures, a housing is used in principle 1 assumed, while in the housing 1 each annular gap-like openings 2 are formed.

Furthermore, in the annular gap each elastic throttle body 3 , in particular designed as a so-called O-ring, present.

This elastic throttle body 3 Change the annular gap or sections thereof due to their elastic deformation at forming pressure differences of the flowing medium not shown in the figures.

As can be seen, the annular gap has a symmetrical profiling on at least one side 4 auf, which in the representations according to the 1a to 1c and 2 through a core 5 is formed, a corresponding, z. B. tooth-like structure.

The elastic throttle body 3 rests with its downstream (in the figures underside) surface on a support shoulder 6 starting, which is part of the housing 1 is.

Like in the 1a . 1b and 2 is seen on the upstream side for axial fixation of the elastic throttle body 3 a retaining ring 7 provided, wherein viewed from the upstream side of the retaining ring 7 the projected upstream side surface of the throttle body substantially only to a maximum of half, preferably up to a maximum of one-third covered, so that the flow pressure of the flowing medium sufficiently at the throttle body 3 attacks and uneven spots in the control characteristic (see 6 ) be avoided.

The central core 5 is over radial webs 8th with the retaining ring 7 connected, wherein it is preferably assumed here by an integral part, which in the housing 1 can be inserted or pressed in.

At the housing 1 is also a circumferential inner waistband 9 provided, which the retaining ring 7 with the central core 5 supported. The central core 5 can, as in particular from the representation after 1a and 1b be seen, have a conical shape, the conicity of the upstream side ( 1a Top) to the downstream side ( 1a Bottom) decreases.

In one embodiment of the invention, the support shoulder 6 formed extended to the longitudinal axis or the center of the controller extended to a reinforced support of the throttle body 3 to achieve, especially at higher pressure load.

In the 1a to 1c not shown there is the possibility that in the housing inside a circumferential groove for supporting and receiving a corresponding portion of the elastic throttle body 3 is provided.

As a result, an adverse effect on the throttle body 3 excluded under severe pressure induced deformation.

The housing 1 or parts of the housing 1 may in particular in an upper portion of a taper 10 (see principle representation after 5a ) in order to ensure a corresponding sealing effect when introducing such a designed flow regulator in a mounting hole or mounting sleeve.

According to the second embodiment of the 3a to 3c . 4a to 4c such as 5a to 5c becomes the symmetric profiling of the annular gap 2 in the case 1 realized by means of a regulator contour, which extends over the inner peripheral surface or inside of the annular gap 2 extending housing part extends.

In particular, elevations are here on the inner circumference side 11 or corresponding structures formed.

As in the 4a to 4c recognizable, is a circumferential groove 12 in the protruding sections (surveys 11 ) of the regulator contour provided.

In the second embodiment of the invention according to the 3a to 3c and 4a to 4c such as 5a to 5c is made of retaining tabs 13 assumed, starting from a core part 14 of the here integrally executed housing 1 extend in the inflow (up), the free ends of the retaining tabs 13 in the direction of the annular gap 2 bent.

These free ends 15 are towards the outer circumference of the housing 1 bent and secure thereby the elastic throttle body 3 especially with changes in flow direction.

Also for the training of the retaining tabs 13 with their free ends 15 applies the teaching of the invention, wherein viewed from the inflow side of the retaining tabs the projected upstream side surface of the throttle body 3 essentially only up to a maximum of half, preferably up to a maximum of one-third covered, so that the flow pressure of the flowing medium sufficiently at the throttle body 3 attacks and points of discontinuity in the control characteristic are avoided.

As an alternative to the axial fixation of the elastic throttle body via a retaining ring or a plurality of retaining tabs, the O-ring can be axially secured by a retaining bead, which is either also formed by reshaping a cylindrical collar or by forced removal or corresponding impression of an undercut with a split injection molding tool , The manufacturing method explained below according to the 9a to 9c may also be used in principle for the production of the aforementioned bead, if it is formed from a collar existing in the axial direction.

The 2 shows a typical use case of a flow control within an adapter 16 that has an external thread 17 and an internal thread 18 wearing.

This adapter can be used between a fitting 19 and a shower hose 20 to be ordered.

The advantage of this solution is that a retrofittability is given in almost every shower and / or bath shower faucet, although due to the standardized thread for shower hoses and fittings drains. In addition, the arrangement of the flow regulator at strong pressures protects the shower hose during operation against excessive compressive stress. The system pressure prevailing upstream of the valve is thus reduced by the pressure losses of the valve itself and the flow regulator in the desired manner.

In the illustration after 4a , which corresponds to a longitudinal section of the flow rate regulator according to the second embodiment, is the mentioned groove 12 educated.

In this circumferential groove 12 can the elastic throttle body 3 support under strong compression deformation (see 4b ), whereby the desired control behavior and its reproducibility is maintained.

In the presentation after the 5a to 5c is again assumed by a controller of the second embodiment, in addition to a supply side protective or attachment screen 21 is mounted.

The regulator housing 1 is here formed in one piece, with the attachment strainer 21 Snap-in via a snap-in connection, at the top of the case 1 is fixed.

The representation of the flow rate Q in l / min above the pressure according to the curves 6 shows the mode of action when using the flow rate regulator according to the invention.

With the constructive solution and design technology presented here an overshoot (thin curve) is avoided. Also, with the solution according to the invention a steeper rise and a transition to a horizontal curve without discontinuities (thicker curve) achieved. The illustrated curve is only an example.

The desired increase can also be selected according to the design of the quantity regulator so that a nominal flow is already present at approx. 0.2 bar.

The 7a to 7f show different embodiments of each symmetrical controller profiles, with which the flow of the quantity regulator can be adapted to both the operating pressure and the properties of the respective throttle body. Relevant in this respect are the embodiments of the profiles according to the 7a to 7c ,

The 7d to 7f show a symmetrical combination of different tooth profiles (high profile and flat profile). In the 7e two or more differently designed subsegments of the regulator are combined to achieve a desired regulator result. It thus results on the basis of prefabricated profiles or sub-profiles a considerable possibility of fine adjustment of flow rates by not only can be varied between different prefabricated solid profiles, but in which the spectrum of the combination of sub-profiles for tuning is increased again.

The figuratively illustrated solution according to the invention can also be continued on a combination of individual teeth, which can be assembled individually with the same pitch of a modular system of different tooth shapes, without the required in the past in the prior art geometrical and usually irreversible adjustments to Production tool, which was made by grinding or other machining or abrasive processes.

In the representations after the 8a and 8b is below the partially broken perspective view of the second embodiment of the flow rate regulator ( 8a ) or the first embodiment of the flow rate regulator ( 8b ) shows a table listing different flow rates (left-hand column of the table), with the corresponding coding color being indicated in the respective line.

When one-piece housing after 8a a simple coding is used.

In the two-piece housing after 8b can be done a two-color coding, the second, not yet coded side occupied color z. B. indicates the properties of each inserted elastic throttle body.

With the help of 9a to 9c the production method of the loss and Aufschwimmsicherung the quantity controller according to the second embodiment is shown in its course.

According to 9a becomes the elastic throttle body 3 over the still stretched retaining tabs 13 slipped. These retaining tabs 13 provide in their overall arrangement a centering and guiding mandrel for the elastic throttle body 3 represents.

After the throttle body 3 has been arranged accordingly, in a next step ( 9b ) a stamp-like tool 22 used, which at its underside a stepped, diameter-reduced section 23 has. This reduced diameter section 23 goes arcuately concave (area 24 ) in a larger diameter section 25 above.

The concave section 24 acts on the retaining tabs 13 and deform their free end 15 , like in the 9c after removing the tool 22 shown.

Especially for public procurement projects, the flow rate regulator according to the invention can be used, taking into account the resulting savings in water consumption, a reduction in associated with hot water consumption heating energy and a reduced in the case of fossil heat production emissions of carbon dioxide. Furthermore, there is the advantage of improved network utilization with an already existing supply-side infrastructure.

Public, but also private water suppliers are confronted with an ever higher level of comfort and entitlement of the population, which is reflected on the one hand in a more frequent use of body showers, on the other hand in the often increasing water consumption through comfortable sanitary fittings and shower facilities that embody the wellness concept ,

Thus, there is the problem that existing water supply infrastructures can not quickly enough follow the increasing water consumption of the population and reach their limit load, with the result that security of supply and pressure stability is endangered. A widespread use of the proposed pressure regulator can delay or prevent this situation, however, because on the one hand, the absolute consumption per tap is reduced and on the other hand, in particular, the load of the network at peak times is less large. This, in turn, benefits the comfort of the consumer, especially in the case of pressure-side problematic higher floors in residential buildings or the like, or in urban areas that are higher in relation to the environment. Even within a house or a street train, the use of quantity controllers has a uniform effect. H. Consumers in lower pressure zones are no longer hydraulically unequally served by the excessive consumption of individual taps, as the flow regulators contribute to a homogenization of the total water flow.

Of course, the presented flow rate controllers can be combined with conventional jet regulators. It is also possible to realize low pressure variants by using throttle bodies with a low Shore hardness ≤ 60 with a correspondingly selected profile contour.

LIST OF REFERENCE NUMBERS

1

casing

2

annular gap-like opening

3

elastic throttle body

4

symmetrical profiling

5

core

6

supporting shoulder

7

retaining ring

8th

web

9

inner collar

10

taper

11

survey

12

groove

13

retaining tabs

14

core part

15

free end of the retaining tab or the retaining bead

16

adapter

17

external thread

18

inner thread

19

fitting

20

shower hose

21

attachment screen

22

stamp-like tool

23, 25

section

24

Area

Claims (13)

Flow regulator for sanitary applications with a housing having an annular gap-like passage opening, further arranged with an annular gap close, elastic throttle body which changes the annular gap or portions thereof due to elastic deformation at forming pressure differences of the flowing medium, wherein the annular gap has a profiling and the elastic throttle body with its downstream surface on a support shoulder, which is part of the housing, supported, characterized in that on the inflow side for axially fixing the elastic throttle body, a retaining ring or a retaining bead are provided, viewed from the inflow side of the retaining ring or Haltewulst the projected upstream side surface of the throttle body substantially only to a maximum of one-third covered, so that the flow pressure of the flowing medium attacks sufficiently on the throttle body and discontinuous keitsstellen in the control curve to be avoided, the symmetrical profiling of the annular gap is realized by means of a regulator contour of a central core, wherein the central core, connected via radial webs with the retaining ring or the retaining bead, an integral part, which inserts into the housing or einpressbar and the central core has a conical shape. Flow regulator according to claim 1, characterized in that on the housing, a circumferential inner collar is provided, which supports the retaining ring or the retaining bead with a central core. Flow regulator according to one of the preceding claims, characterized in that the support shoulder is formed extended to the longitudinal axis or the center of the controller in order to achieve increased support of the throttle body, in particular at higher pressure load. Flow regulator according to one of the preceding claims, characterized in that the housing has on the inside a circumferential groove for supporting and receiving a corresponding portion of the elastic throttle body with strong pressure-induced deformation. Flow regulator according to one of the preceding claims, characterized in that the housing has at least one end portion on the outer peripheral side a taper for sealing when introducing the regulator into a mounting hole or mounting sleeve. Flow regulator according to claim 1, 4 or 5, characterized in that the symmetrical profiling of the annular gap is realized by means of a regulator contour, which extends over the inner peripheral surface or inside of the annular gap facing housing part. Flow regulator according to claim 4 and 6, characterized in that the circumferential groove is provided in protruding portions of the regulator contour. Flow regulator for sanitary applications with a housing having an annular gap-like passage opening, further arranged with an annular gap close, elastic throttle body which changes the annular gap or portions thereof due to elastic deformation at forming pressure differences of the flowing medium, wherein the annular gap has a profiling and the elastic throttle body with its downstream surface on a support shoulder, which is part of the housing, supported, characterized in that on the inflow side for axially fixing the elastic throttle body a plurality of retaining tabs are provided, viewed from the inflow side of the retaining tabs the projected inflow-side surface of the Throttle body substantially only to a maximum of one-third covered, so that the flow pressure of the flowing medium attacks sufficiently on the throttle body and discontinuities in the Regelkennli can never be avoided, wherein the retaining tabs extend from a core part of an integrally running housing in the inflow direction, wherein the free ends of the retaining tabs are bent in the direction of the annular gap. Flow regulator according to one of the preceding claims, characterized in that the housing has a substantially cylindrical or sleeve shape. Flow regulator according to at least one of the preceding claims, characterized in that the housing has a flow rate and / or the properties of the elastic throttle body representing color coding. Flow regulator for sanitary applications with a housing having an annular gap-like passage opening, further arranged with an annular gap close, elastic throttle body which changes the annular gap or portions thereof due to elastic deformation at forming pressure differences of the flowing medium, wherein the annular gap has a profiling and the elastic throttle body with its downstream surface on a support shoulder, which is part of the housing, supported, characterized in that the symmetrical profiling of the annular gap is realized by means of a regulator contour of a central core, wherein the profiling is variable in terms of flow and operating pressure and in this case the profiling of a tooth profile, a rectangular profile, a wave-shaped profile, a trapezoidal profile or combinations of the aforementioned profiles, wherein in a combination each typical geometric profile is guided over a circular segment portion of the contour, wherein the symmetrical profiling of profiles of different height and / or different geometric shape consists, two or more differently designed sub-segments can be combined. Method for the design of the symmetrical profiling of an annular gap for flow rate regulator according to one of the preceding claims, characterized in that - the average given elastic properties are determined from a respective batch available elastic throttle body and stored for the respective batch; - Taking into account the stored elasticity values and the desired flow regulator passage curve from a database, the respective Produktkonkrete regulator contour is selected, which realized in combination with the respective throttle body batch the desired flow regulator passage curve and - wherein furthermore the geometric data of the selected controller contour the respective injection mold determine or provided by means of the geometric data in stock housing or ring gap-determining housing parts are provided for completion with the respective batch of throttle body. A method of manufacturing a flow rate regulator according to any one of claims 1, 4, 5, 6, 7 or 8, characterized in that the throttle body placed over the retaining tabs or parts of the retaining bead and then with the aid of a stamp-like tool end portions of the retaining tabs or parts of the retaining bead radially outwardly formed and thereby the respective throttle body are secured.

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