EP3708723A1 - Beam controller - Google Patents

Abstract

The invention relates to a jet regulator with a jet regulator housing which has an external thread on its housing outer circumference for screwing into an internal thread in the water outlet of a sanitary outlet fitting. The aerator according to the invention is characterized by the fact that the aerator housing has on its outer circumference at least one cross-sectional enlargement which is the same material as the housing section of the aerator housing bearing the external thread and which is integrally formed thereon and which can be placed on the water outlet in a sealing manner on the front and / or inner circumference.

Description

The invention relates to a jet regulator with a jet regulator housing which has an external thread on its housing outer circumference for screwing into an internal thread in the water outlet of a sanitary outlet fitting, the jet regulator housing on its housing outer circumference having at least one cross-sectional expansion of the same material and integrally formed thereon with the housing section of the jet regulator housing bearing the external thread which can be placed sealingly on the water outlet on the front side and / or on the inner circumference side.

A wide variety of jet regulators have already been created in order to shape the water flowing out of the water outlet of a sanitary outlet fitting into a homogeneous and non-splashing water jet. The previously known jet regulators are mounted on a sanitary outlet fitting in the area of the water outlet.

From the EP 3 153 633 A1 one already knows a jet regulator which has an external thread on the outer circumference of its jet regulator housing, with which the jet regulator housing can be screwed into an internal thread in the water outlet of a sanitary outlet fitting. In order not to have to seal the previously known jet regulator in the area of the annular gap between the jet regulator housing and the inner circumference of the water outlet by means of at least one separate sealing ring made of elastic material, the external thread in the known jet regulator is provided directly below at least one ventilation opening penetrating the circumferential wall of the jet regulator housing which ventilation opening can also be sucked into the interior of the housing in addition to the ambient air, which could pass through the annular gap through the screw connection between the external and internal thread. As soon as water flows through the previously known jet regulator and, as a result, a negative pressure is present at its at least one ventilation opening, the known jet regulator is able to entrain a portion of the leakage water passing through the screw connection into the interior of the housing. Since the ventilation openings only extend over part of the circumference of the jet regulator housing, there is a risk that the remaining leakage water will pass the annular gap remaining between the outer circumference of the jet regulator housing and the inner circumference in the water outlet of the sanitary outlet fitting and emerge in a disruptive manner at the downstream end of the water outlet.

From the DE 10 2010 023 664 A1 A sanitary outlet fitting with a water outlet is previously known, which has an outlet opening delimited by an inner peripheral wall of the outlet fitting, on which inner peripheral wall an internal thread is provided, into which a sleeve-shaped outlet mouthpiece with an external thread can be screwed. A jet regulator designed as an insertable cartridge can be inserted in the sleeve-shaped outlet mouthpiece. The outlet mouthpiece that accommodates the jet regulator has an annular groove below its external thread in the screwing-in direction for receiving a sealing ring, to which annular groove is connected a cross-sectional widening projecting flange-like on the outer circumference. The outlet mouthpiece can thus be screwed into the internal thread in the water outlet of the outlet fitting until the flange-like cross-sectional widening which borders the annular groove and serves as an insertion stop strikes the inner circumferential wall in the water outlet of the outlet fitting. This cross-sectional widening at the outlet mouthpiece, which serves as an insertion stop, may indeed be between the outer circumference of the The outlet mouthpiece on the one hand and the water outlet on the other hand, seal the remaining annular gap on the inner circumference side, - however, this does not eliminate a leak between the jet regulator housing and the inner circumference of the outlet mouthpiece.

There is therefore the particular object of creating a jet regulator of the type mentioned above, which is characterized by a significantly improved seal in the area between the outer circumference of the jet regulator housing and the inner circumference in the water outlet of the sanitary outlet fitting.

In the jet regulator of the type mentioned, the inventive solution to this problem is that a housing section of the jet regulator housing arranged on the outflow side of the external thread is angled in the direction of the inner circumference of the water outlet in such a way that an annular drainage space between this housing section and the inner circumference of the water outlet is formed.

The jet regulator designed according to this proposed invention has a jet regulator housing which has at least one cross-sectional expansion, which is made of the same material and integrally formed with the housing section of the jet regulator housing bearing the external thread, and which can be placed on the water outlet in a sealing manner on the face and / or inner circumference. According to the invention it is now provided that a housing front edge area of the jet regulator housing arranged on the outflow side of the external thread is angled in the direction of the inner circumference of the water outlet in such a way that an annular drainage space is formed between this housing front edge area and the inner circumference of the water outlet. Leakage water, which via the screw connection through the ring zone between the outer circumference of the housing and the inner circumference of the water outlet passes through to the downstream end peripheral edge area of the jet regulator housing, there is collected in an annular drainage space which is formed between the downstream housing end edge area and the inner circumference of the water outlet. Due to these special design features of the jet regulator housing, uncontrolled leakage of water through the annular zone arranged between the outer circumference of the jet regulator housing and the inner circumference of the water outlet is effectively avoided under almost all operating conditions, even if the jet regulator according to the invention is designed without additional elastic sealing rings for axial or radial sealing of the jet regulator housing is. With the jet regulator according to the invention, the above-mentioned ring zone is reliably sealed even if the internal thread in the water outlet cannot be manufactured with high precision, and if the annular shoulder in the water outlet required for axial sealing is to be dispensed with in favor of less manufacturing effort in the manufacture of the outlet fitting .

Due to its special design features, the jet regulator according to the invention is comparatively insensitive to calcification, even in the area of its jet regulator housing. A preferred embodiment according to the invention therefore provides that the jet regulator is designed as a jet aerator, which mixes the water flowing through it with ambient air, and for this purpose, in a housing section of the jet regulator housing arranged on the outflow side of the external thread, at least one on the housing circumference or on the housing face of the jet regulator housing provided ventilation opening.

In order for the aerator to be able to shape the water flowing through its aerator housing well, the The interior of the housing requires beam-shaping structures. In order to be able to insert such jet-shaping structures into the jet regulator housing in a simple manner, it is advantageous if the jet regulator housing has at least two housing parts that can be connected to one another, and if a first housing part arranged on the downstream side carries the external thread. At least two adjacent housing parts of the jet regulator housing can then be connected to one another in a non-detachable manner, but preferably in a detachable manner.

The water flowing through the jet regulator housing can be shaped particularly effectively if the outflow side, first housing part, on the inflow side, can preferably be detachably connected to a second housing part of the jet regulator housing, which second housing part carries a jet splitter which splits the flowing water into a multitude of individual jets. A preferred embodiment according to the invention provides that the jet splitter is designed as a diffuser which has a pot-shaped jet splitter insert which has a plurality of splitter openings on the circumference of its pot shape, and which has a pot bottom which acts as a water flow to the splitter openings deflecting baffle is formed.

In order to first split the water flowing into the jet regulator housing into individual jets and then to accelerate the individual jets in such a way that a negative pressure is created on the outflow side of the diffuser, it is advantageous if the second housing part encompasses the jet splitter insert and if the second housing part is at least in the The area of the cylinder openings tapers conically in such a way that an annular gap is formed between the jet splitter insert and the inner circumference of the housing of the second housing part, which on the outflow side leads to an annular opening opening in the housing interior tapered towards.

A preferred development according to the invention provides that a sleeve-shaped guide wall is provided in the jet regulator housing and that at least one ventilation channel is provided between the inner circumference of the jet regulator housing and the guide wall, which leads from at least one ventilation opening located on the housing downstream side to the housing interior. In this further development, the jet regulator according to the invention has an outer surface formed by the outer circumference of the housing and an inner surface formed by the guide wall. Since the at least one ventilation channel and the at least one ventilation opening can thus be arranged on the inner surface of the jet regulator designed as a jet ventilator, accelerated calcification in the ring zone between the outer circumference of the jet regulator housing and the inner circumference in the water outlet is effectively counteracted.

A particularly advantageous, because particularly tight, design according to the invention provides that the downstream edge of the housing front edge of the jet regulator housing is designed as a lip seal that rests on the inner circumference of the water outlet or approximates the inner circumference of the water outlet. The housing end edge, which is designed as a lip seal, on the outflow side can lie tightly against the inner circumference of the water outlet. However, it is also possible that this housing front edge is only approximated to the inner circumference of the water outlet in such a way that the leakage water collected in the drainage annulus is held there due to the capillary forces, or that an annular gap remaining between the lip seal on the one hand and the inner circumference of the water outlet on the other is through an in this area, possibly desirable because functionally harmless calcification, is tightly closed.

In order to continuously empty the annular drainage space during the operation of the jet regulator according to the invention, it is advantageous if at least one drainage opening is provided in the sub-area of the housing wall of the aerator housing arranged between the downstream edge of the housing and the external thread, from the annular drainage space to the ventilation channel or leads to at least one of the ventilation channels. Thus, the ambient air sucked through the ventilation channel into the housing interior of the jet ventilator can entrain leakage water from the drainage openings, which mixes inside the housing with the water flow flowing through the jet regulator housing.

The functional operation of the jet regulator according to the invention is also secured against unauthorized manipulation if a grid or net structure is integrally formed on the guide wall on the outflow side from webs crossing each other at intersections. In this way, this outflow-side grid or network structure, which can also serve as a flow straightener, which combines the water, in particular mixed with ambient air, into a homogeneous water jet, - and the structures behind it inside the housing cannot be pushed upwards against the flow direction of the water.

In order to be able to screw the jet regulator according to the invention in a simple manner in the water outlet of a sanitary outlet fitting, it is advantageous if the guide wall is connected to the jet regulator housing and in particular to the outflow-side first housing part in a rotationally fixed manner and in particular in one piece and if to the guide wall and / or to the grille - or network structure, at least one tool engagement surface is provided for a turning tool.

An embodiment according to the invention that is particularly easy to manufacture and easy to use provides that at least one slot-shaped recess is provided in the lattice or net structure for inserting a coin or other turning tool used as a turning tool, which is delimited by opposite longitudinal slot walls, which tool contact surfaces form for the turning tool.

A structurally simple and well-sealing embodiment according to the invention, in which the external thread forms a thread profile that deviates at least in some areas from a thread notch running continuously around a cylindrical wall in the manner of a helix, provides that the outer enveloping circle of the internal thread formed into the cylindrical water outlet for screwing certain external thread on the jet regulator housing preferably widens conically towards the downstream side. In this embodiment, the external thread with its conically enlarged thread section digs so deep into the circumferential thread notch of the internal thread provided in the water outlet that this annular zone between the external thread on the outer circumference of the housing and the internal thread in the water outlet is effectively sealed against leakage water seeping through.

A seepage of leakage water is to be expected at most via the screw connection between the internal and external thread. In order to secure the threads of this screw connection against seeping through of leakage water, it is useful if at least one formation serving as a liquid bulkhead is provided on the outer circumference of the jet regulator housing, which protrudes into at least one thread notch of the external thread.

So that the formation serving as a liquid bulkhead can dig deep into the thread notch of the internal thread provided at the water outlet, it is expedient if the at least one formation extends to the enveloping circle surrounding the external thread or at least partially protrudes beyond this enveloping circle.

A particularly effective seal is promoted if the at least one formation is designed as a partition wall extending over at least two adjacent thread notches of the external thread.

In this case, a conveniently manageable, easy to manufacture and effectively sealing embodiment according to the invention, in which the partition represents a deviation in the external thread from a continuously helical thread notch running around a cylindrical wall, provides that the at least one partition is at least axially parallel to the longitudinal axis of the housing of the jet regulator housing.

The deviation in the external thread provided according to the invention can additionally or instead also be designed as at least one cam-shaped formation, the cam-shaped formation in the thread notch extending approximately in the longitudinal direction of the notch.

It is also possible, however, that the thread profile of the external thread protruding beyond the thread notch widens at least in some areas and preferably in an outflow-side threaded section, so that the external thread with this outflow-widening thread section can cut deeply into the internal thread in a sealing manner.

In order to provide a cross-sectional expansion on the outside circumference of the jet regulator housing, see a embodiment according to the invention that the at least one cross-sectional enlargement protrudes like a flange on the housing outer circumference of the jet regulator housing.

In this case, the at least one flange-like cross-sectional widening can extend in the circumferential direction of the housing of the jet regulator housing via at least one drainage opening.

So that only a small proportion of leakage water can seep into the drainage annulus, it is useful if the at least one flange-like cross-sectional extension is provided on the outer circumference of the jet regulator housing between the external thread and the at least one drainage opening.

A particularly tight design according to the invention provides that the flange-like cross-sectional expansion is designed as an annular flange surrounding the jet regulator housing.

A preferred embodiment according to the invention provides that the at least one flange-like cross-sectional widening is designed as a screw-in stop which limits the screwing of the external thread into the internal thread in the water outlet of the outlet fitting.

Since the ring zone located between the outer circumference of the aerator housing and the inner circumference of the water outlet is well sealed in the aerator according to the invention, a preferred embodiment according to the invention provides that the aerator is designed without a sealing ring and does not require a sealing ring made of elastic material separately from the aerator housing.

In the exemplary embodiment already described above, the jet splitter is designed as a diffuser. In certain applications, an exemplary embodiment configured differently provides that the jet splitter is designed as a perforated plate which has splitter openings. So that a corresponding negative pressure arises on the outflow side of the jet splitter designed as a perforated plate, it is advantageous if the splitter openings taper at least in some areas in the flow direction.

In order to subsequently shape the individual jets coming from the jet splitter and possibly mixed with ambient air again into a homogeneous jet that exits the jet regulator in a non-spraying manner, it is advantageous if the jet splitter is followed by at least one insert part, which insert part is a grid - or has a network structure of webs crossing one another at intersection nodes.

Advantageous developments according to the invention provide that the grid or mesh structure (s) provided in the at least one insert part and / or the lattice or mesh structure (s) formed in one piece on the guide wall has flow openings which have a honeycomb-shaped and / or hexagonal clear opening cross-section.

A differently designed embodiment provides that the grid or net structure (s) provided in the at least one insert part and / or integrally formed on the guide wall is formed from at least two concentrically circumferential webs that are connected to a set of radial webs.

If in at least one of the insert parts and / or on the If the guide wall in the jet regulator housing is to be designed with a lattice or mesh structure that has diamond-shaped or rectangular flow openings, it is advantageous if the lattice or mesh structure (s) formed in one piece on the guide wall in the at least one insert part and a group of axially parallel first Has / have webs which intersect with a set of axially parallel second webs which are arranged at an angle thereto and preferably at a right angle.

Another proposal according to the invention provides that the lattice or mesh structure (s) formed in one piece in the insert and / or in the guide wall is / are formed by crossing webs, which are arranged at an angle to one another in such a way that these lattice structures or network structure (s) is / are formed ornamentally from flow openings of irregular shape in their clear opening cross-section.

Developments according to the invention emerge from the claims in connection with the drawing and the description. The invention is described in more detail below using preferred exemplary embodiments:

Fig. 1

einen Strahlregler in einer Seitenansicht, bei dem der Drainage-Ringraum über Drainageöffnungen mit einem im Gehäuseinneren ringförmig umlaufenden Belüftungskanal verbunden ist, wobei oberhalb der Drainageöffnungen flanschartige Querschnittserweiterungen vorstehen, die ein Einsickern von Leckagewasser in den Drainage-Ringraum begrenzen,

Fig. 2

den unter Verwendung des in Figur 1 gezeigten Strahlreglergehäuses fertiggestellten Strahlregler in einem Längsschnitt,

Fig. 3

den Strahlregler aus Figur 2 in einem Detail-Längsschnitt durch die Schraubverbindung zwischen dem Strahlreglergehäuse einerseits und dem im Wasserauslauf vorgesehenen Innengewinde andererseits gemäß dem in Fig. 2 umrahmten Bereich,

Fig. 4

einen Strahlregler in einer Seitenansicht, wobei der hier gezeigte Strahlregler eine oberhalb von Drainageöffnungen angeordnete flanschartige Querschnittserweiterung hat, die am Außenumfang des Strahlreglergehäuses umläuft,

Fig. 5

den Strahlregler aus Figur 4 in einem Längsschnitt und

Fig. 6

die zwischen dem Außengewinde am Strahlreglergehäuse einerseits und dem Innengewinde im Wasserauslauf andererseits vorgesehene Schraubverbindung in einem Detail-Längsschnitt im Bereich der flanschartig um das Strahlreglergehäuse umlaufenden Querschnittserweiterung, gemäß dem in Fig. 5 umrahmten Bereich.

It shows:

Fig. 1

a jet regulator in a side view, in which the drainage annular space is connected via drainage openings to a ventilation duct running around the inside of the housing in a ring-shaped manner, with flange-like cross-sectional extensions protruding above the drainage openings, which limit the seepage of leakage water into the drainage annular space,

Fig. 2

using the in Figure 1 shown aerator housing completed aerator in a longitudinal section,

Fig. 3

the aerator off Figure 2 in a detailed longitudinal section through the screw connection between the jet regulator housing on the one hand and the internal thread provided in the water outlet on the other hand according to the in Fig. 2 framed area,

Fig. 4

a jet regulator in a side view, wherein the jet regulator shown here has a flange-like cross-sectional enlargement which is arranged above drainage openings and runs around the outer circumference of the jet regulator housing,

Fig. 5

the aerator off Figure 4 in a longitudinal section and

Fig. 6

the screw connection provided between the external thread on the jet regulator housing on the one hand and the internal thread in the water outlet on the other hand in a detailed longitudinal section in the area of the cross-sectional expansion surrounding the jet regulator housing in a flange-like manner, according to the in Fig. 5 framed area.

In the Figures 1 to 6 different versions 127 and 130 of a jet regulator are shown. The jet regulators 127 and 130 are in the Figures 2 and 5 shown in longitudinal sections, which show all the essential components of such a jet regulator by way of example.

The jet regulators 127 and 130 shown here have a jet regulator housing 1, which on its outer circumference of the housing has an external thread 2. With the external thread 2 provided on the outer circumference of the housing, the jet regulators 127 and 130 can each be screwed into an internal thread 3 in the water outlet 4 of a sanitary outlet fitting in order to shape the water emerging there into a homogeneous, non-splashing and possibly also pearly-soft water jet. In order to seal the ring zone 5 remaining between the outer circumference of the jet regulator housing 1 and the inner circumference of the water outlet 4 against uncontrolled leakage of water, the jet regulators can have a thread profile as an external thread 2, which at least in some areas deviates from a continuously helical thread notch around a cylindrical wall. In this thread profile, which is at least regionally different, the external thread 2 interacts in a self-tapping or better self-adapting manner with the internal thread 3 provided in the water outlet 4 in such a way that this screw connection seals particularly well in this area. In addition or - as here - instead, at least one cross-sectional enlargement 6 or 7 is provided in the jet regulators 127 and 130, which is made of the same material and integrally formed with the housing section of the jet regulator housing carrying the external thread 2, and which is at the water outlet 4 at the front and / or can be applied sealingly on the inside circumference. Due to these special design features of the jet regulators shown here, an uncontrolled escape of leakage water through the annular zone provided between the outer circumference of the jet regulator housing 1 and the inner circumference in the water outlet 4 is effectively avoided under almost all operating conditions, even if the jet regulators - as here - without additional elastic sealing rings are designed for axial or radial sealing of the jet regulator housing 1. In the case of the jet regulators 127 and 130, the above-mentioned ring zone is reliably tight even if the internal thread 3 in the water outlet is not with high precision can be manufactured, and if the required for axial sealing annular shoulder in the water outlet 4 is to be dispensed with in favor of a lower manufacturing cost in the manufacture of the outlet fitting.

As seen from the longitudinal sections in Figure 2 and 5 As becomes clear, a housing end edge area of the jet regulator housing 1 arranged on the outflow side of the external thread 2 is angled in the direction of the inner circumference of the water outlet 4 in such a way that an annular drainage space 8 is formed between this housing end edge area and the inner circumference of the water outlet 4.

The jet regulators 127 and 130 are each designed as jet aerators that mix the water flowing through them with ambient air. The jet regulators 127 and 130 designed as jet aerators have at least one ventilation opening 9 which is arranged on the outflow side of the external thread 2 and is designed to be open towards the outflow side of the housing face.

The jet regulator housing 1 of the jet regulators 127 and 130 shown here has at least two housing parts 10, 11 that can be detachably connected to one another, of which a first housing part 10 arranged on the outflow side carries the external thread 2. This first housing part 10 on the outflow side is detachably connected on the inflow side to a second housing part 11 of the jet regulator housing 1, which second housing part 11 carries a jet splitter which splits the water flowing through into a plurality of individual jets.

The jet splitter of the jet regulator can be designed as a perforated plate which has a multiplicity of splitter openings and is integrally formed in the second housing part. In the of the perforated plate oriented transversely to the flow direction, cross-sectional constrictions which are preferably tapered in the flow direction are formed in which the inflowing water experiences an increase in speed. This increase in speed creates a negative pressure on the outflow side of the perforated plate, through which ambient air can be sucked into the inside of the jet regulator housing. In order to intensively mix this ambient air with the water flowing through the interior of the housing, at least one insert part is provided at a distance from the perforated plate on its outflow side, which insert parts each have a grid or net structure made of webs crossing each other at intersections. In the grid or net structure of these inserts, the incoming water is also divided in such a way that it can mix well with the sucked in ambient air before it then turns into a homogeneous, non-splashing and pearly soft surface in a flow straightener at the outlet end of the jet regulator Outlet jet is summarized.

The jet splitter of the jet regulators 127 and 130, on the other hand, is designed as a diffuser which has a pot-shaped jet splitter insert 12, which has a plurality of splitter openings 13 on the circumference of its pot shape, and which has a pot bottom 14 which acts as a water flow to the splitter openings 13 deflecting baffle is formed.

The second housing part 11 engages around the jet splitter insert 12 of the jet splitter. The clear housing cross section of the second housing part 11 tapers conically in such a way that an annular gap is formed between the jet splitting insert 12 and the inner circumference of the housing of the second housing part 11 15 is formed, which tapers on the outflow side to a ring opening 16 opening in the housing interior.

A sleeve-shaped guide wall 17 is provided in the jet regulator housing 1, between which and the inner circumference of the jet regulator housing 1 at least one ventilation channel 18 is provided. This ventilation channel 18 leads from the at least one ventilation opening 9 arranged on the housing downstream side to the housing interior. Since the water, which is divided into individual jets in the jet splitter, experiences an increase in speed in the annular gap 15, a negative pressure arises according to Bernoulli's equation on the outflow side of the annular gap 15 in the area of the annular opening 16, the ambient air from outside through the ventilation channel 18 into the mixing zone 20 Part of the housing interior sucks. There the flowing water is mixed with the sucked in ambient air.

As in the longitudinal sections according to Figures 2 and 5 As can be clearly seen, the housing part or front edge area of the jet regulator housing 1 arranged on the outflow side of the external thread 2 is angled in the direction of the inner circumference of the water outlet 4 in such a way that the annular drainage space 8 is formed between this housing end wall area and the inner circumference of the water outlet 4 . In order to be able to keep the leakage water seeping through the annular zone 5 between the outer circumference of the jet regulator housing 1 and the inner circumference of the water outlet 4 in the annular drainage space 8, the outflow-side end edge of the jet regulator housing 1 is designed as a lip seal 21 that could rest against the inner circumference of the water outlet 4 - Here, however, the inner circumference of the water outlet 4 is only approximated. Due to the capillary forces in this area and due to rapid calcification in the annular gap between the housing front edge designed as a lip seal 21 and the inner circumference in the Water outlet 4, this annular gap is additionally sealed.

As in the longitudinal sections according to Figures 2 and 5 As can be seen, at least one drainage opening 22, which leads from the drainage annular space 8 to the ventilation channel 18, is provided in the partial area of the housing wall of the jet regulator housing 1 arranged between the downstream edge of the housing and the external thread 2. The air sucked in through the ventilation channel 18 can thus entrain the leakage water emerging from the drainage annular space 8 via the drainage openings 22 and lead it into the housing interior, where it mixes with the water flowing through there.

On the outflow side, a grid or net structure 23 is formed in one piece from webs crossing one another at intersections. The through-flow holes 24 of this lattice or net structure 23 formed between adjacent webs, which here have a honeycomb-shaped, hexagonal clear hole cross-section, preferably have a larger longitudinal extension than the hole cross-section, but at least a sufficient longitudinal extension to allow the water mixed inside the housing to form a homogeneous water jet to merge. The guide wall 17 is connected to the jet regulator housing 1 and in particular to the first housing part 10 on the downstream side in a rotationally fixed manner and preferably in one piece. At least one tool application surface for a turning tool is provided on the guide wall 17. For this purpose, at least one slot-shaped recess 29 for inserting a coin used as a turning tool or another turning tool is provided in the lattice or net structure 23. This recess 29 is delimited by opposite longitudinal slot walls. These slot longitudinal walls of the recess 29 form tool engagement surfaces for the turning tool.

In order to design the external thread with a thread profile deviating from a continuously helical thread notch running around a cylindrical wall, the outer circumferential circle of the external thread on the flow regulator housing intended for screwing with the internal thread 3 formed in the cylindrical water outlet 4 can widen conically towards the outflow side in the jet regulator shown . Due to the conicity of the external thread 2, the uppermost thread on the inflow side still sits with play in the internal thread, while the next but one thread already protrudes deeper into the thread notch of the internal thread due to the conicity of the external thread beginning there. The last thread turn on the downstream side of the external thread closes the associated thread notch of the internal thread almost completely, so that leakage water can no longer seep through this screw connection.

Another deviation of the thread profile forming the external thread provides that in the jet regulator a cam-shaped formation is formed on the external thread provided on the housing outer circumference, which extends into one of the thread notches of the external thread approximately in the longitudinal direction of the notch. This cam-shaped formation protrudes beyond the enveloping circle surrounding the external thread. When the external thread is screwed into the internal thread, the cam-shaped formation seals in the groove base of the adjacent internal thread, on the flanks of this internal thread and on the tip of the thread profile when the cam-shaped formation has cut deep into the internal thread.

A further deviation in the thread profile forming the external thread 2 can consist in the fact that in the case of the jet regulator on the outer circumference of the jet regulator housing 1, at least one formation serving as a liquid bulkhead is provided which protrudes into at least one thread notch of the external thread. This at least one formation can be designed as a partition wall which extends over at least two thread notches of the external thread and which runs approximately axially parallel to the longitudinal axis of the jet regulator housing. Since this formation, designed as a partition, protrudes far beyond the enveloping circle surrounding the external thread, this formation also represents a cross-sectional expansion projecting over the adjoining areas of the jet regulator housing, which is the same material as the housing section of the jet regulator housing carrying the external thread and is formed in one piece thereon and which is formed on the water outlet rests sealingly on the inner circumference and prevents leakage water from seeping through the screw connection.

It is also possible that, in the jet regulator, the external thread is designed as a thread profile that deviates at least in some areas from a thread notch running continuously around a cylindrical wall in a helical manner. For this purpose, the thread profile of the external thread protruding beyond the thread notch expands, preferably in a downstream thread section, at least in some areas and in this way forms a sealing wedge Cut into the outlet fitting.

Using the jet regulators 127 and 130, it is shown that the jet regulator housing 1 also has at least one cross-sectional widening 6, which is of the same material and is integrally formed on its housing outer circumference, with the housing section of the jet regulator housing 1 bearing the external thread 2; 7 may have the front side and / or at the water outlet 4 can be applied sealingly on the inner circumference. This cross-sectional enlargement 6; 7 are designed flange-like in the jet regulators 127 and 130 and extend in the circumferential direction of the housing of the jet regulator housing 1 via at least one of the drainage openings 22. The flange-like cross-sectional extensions 6; 7 on the housing outer circumference of the jet regulator housing 1, the jet regulators 127, 130 are provided between the external thread 2 and the at least one drainage opening 22. While in the Figures 1 to 3 The jet regulator 127 shown, the flange-like cross-sectional enlargements 6 are each arranged on the inflow side directly above one of the drainage openings 22, the in the Figures 4 to 6 In contrast, the jet regulator 130 shown has a flange-like cross-sectional enlargement 7, which is designed as an annular flange surrounding the jet regulator housing 1. The flange-like cross-sectional enlargements 6; 7 on the jet regulators 127, 130 are also designed as a screw-in stop, which limits the screwing of the external thread 2 into the internal thread 3 in the water outlet 4 of the outlet fitting. The cross-sectional enlargements can be placed on the outlet face or - as here - on the inner circumference of the water outlet in a sealing manner.

The aerators shown here are characterized by a high level of sealing in the area of the ring zone 5 located between the outer circumference of the aerator housing 1 and the inner circumference in the water outlet 4 of the outlet fitting, without separate and, in particular, material-different sealing rings being necessary for sealing. The jet regulators 127 and 130 shown here are therefore designed without a sealing ring and manage without a sealing ring made of elastic material separately from the jet regulator housing 1.

List of reference symbols

1

Aerator housing

2

External thread

3

inner thread

4th

Water outlet

6th

flange-like cross-sectional expansion (on the jet regulator 127 according to FIGS Figures 1 to 3 )

7th

circumferential flange-like cross-sectional expansion (on jet regulator 130 according to FIGS Figures 4 to 6 )

8th

Drainage annulus

9

Ventilation opening

10

first housing part on the downstream side

11

second housing part

12

Jet splitter insert

13

Butcher openings

14th

Pot bottom

15th

Annular gap (in jet splitter)

16

Ring opening (of the annular gap 15)

17th

Guide wall

18th

Ventilation duct

19th

Channel opening

20th

Mixing zone

21st

Lip seal

22nd

Drainage opening

23

Lattice or net structure

24

Flow openings

29

Recess

127

Jet regulator according to Figs. 1 to 3

130

Jet regulator according to Figures 4 to 6

Claims (33)

Jet regulator (127, 130) with a jet regulator housing (1), which (1) has an external thread (2) on its housing outer circumference for screwing into an internal thread (3) in the water outlet of a sanitary outlet fitting, the jet regulator housing (1) at least on its outer circumference has a cross-sectional enlargement (6, 7) of the same material as the housing section of the jet regulator housing (1) carrying the external thread (2) and integrally formed thereon, which can be placed on the water outlet (4) in a sealing manner on the face and / or the inner circumference, characterized in that a The housing section of the jet regulator housing (1) arranged downstream of the external thread (2) is angled towards the inner circumference of the water outlet (4) in such a way that an annular drainage space (8) is formed between this housing section and the inner circumference of the water outlet. Jet regulator according to claim 1, characterized in that the jet regulator (127, 130) is designed as a jet aerator, which mixes the water flowing through it with ambient air, and in a housing section of the jet regulator housing (1) arranged on the outflow side of the external thread (2) ) has at least one ventilation opening (9) provided on the housing circumference or on the housing face of the jet regulator housing (1). Jet regulator according to Claim 1 or 2, characterized in that the jet regulator housing (1) has at least two housing parts (10, 11) which can be connected to one another, preferably detachably. Jet regulator according to one of Claims 2 or 3, characterized in that a first housing part (10) arranged on the outflow side carries the external thread (2). Jet regulator according to Claim 4, characterized in that the first housing part (10) on the outflow side can be connected, preferably detachably, on the inflow side to a second housing part (11) of the jet regulator housing (1), which second housing part (11) carries a jet splitter that carries the water flowing through broken down into a multitude of individual rays. Jet regulator according to claim 5, characterized in that the jet splitter is designed as a diffuser which has a pot-shaped jet splitter insert (12) which (12) has a plurality of splitter openings (13) on the circumference of its pot shape, and which (12) has a pot bottom ( 14), which is designed as an impact surface which deflects the inflowing water towards the splitting openings (13). Jet regulator according to claim 6, characterized in that the second housing part (11) engages around the jet splitter insert (12) and that the second housing part (11) tapers at least in the area of the cylinder openings (13) in such a way that between the jet splitter insert (12) and the Housing inner circumference of the second housing part (11) an annular gap (15) is formed, which (15) tapers on the outflow side towards an annular opening (16) opening in the housing interior. Jet regulator according to one of claims 1 to 7, characterized in that a sleeve-shaped guide wall (17) is provided in the jet regulator housing (1), and that between the inner circumference of the jet regulator housing (2) and the guide wall (17) at least one ventilation channel (18) is provided which leads (18) from at least one ventilation opening (9) arranged on the housing downstream side to the housing interior. Jet regulator according to Claim 8, characterized in that the outflow-side housing end edge of the jet regulator housing (1) is designed as a lip seal (21) which (21) rests against the inner circumference of the water outlet (4) or approximates the inner circumference of the water outlet (4). Jet regulator according to claim 8 or 9, characterized in that at least one drainage opening (22) is provided in the part of the housing wall of the jet regulator housing (1) which is arranged between the outflow-side housing face and the external thread (2), which is closed by the drainage annular space (8) the ventilation channel (18) or to at least one of the ventilation channels (18). Jet regulator according to one of Claims 7 to 10, characterized in that a lattice or net structure (23) consisting of webs crossing each other at intersections is integrally formed on the guide wall (17) on the outflow side. Jet regulator according to one of Claims 7 to 11, characterized in that the guide wall (17) is connected to the jet regulator housing (1) and in particular to the outflow-side first housing part (10) in a rotationally fixed manner and in particular in one piece, and that on the guide wall (17) and / or at least one tool contact surface for a turning tool is provided on the lattice or net structure (23). Jet regulator according to claim 12, characterized in that at least one slot-shaped recess (29) for inserting a coin used as a turning tool or another turning tool is provided in the lattice or net structure, which is delimited by opposite longitudinal slot walls, which tool engagement surfaces for the turning tool form. Jet regulator according to one of claims 1 to 13, characterized in that the outer envelope formed by the external thread (2) on the jet regulator housing (1) intended to be screwed to the cylindrical internal thread, preferably widens conically towards the outflow side. Jet regulator according to one of Claims 1 to 14, characterized in that at least one recess serving as a liquid bulkhead is provided on the outer circumference of the jet regulator housing (1) and protrudes into at least one thread notch of the external thread (2). The jet regulator according to claim 15, characterized in that the at least one formation extends as far as the enveloping body enveloping the external thread (2) or protrudes over this enveloping body at least in regions. Jet regulator according to claim 15 or 16, characterized in that the at least one formation is designed as a partition wall extending over at least two adjacent thread notches of the external thread. Jet regulator according to Claim 17, characterized in that the at least one partition wall runs approximately axially parallel to the longitudinal axis of the jet regulator housing (1). Jet regulator according to one of Claims 1 to 18, characterized in that the at least one formation is cam-shaped and that the cam-shaped formation extends in the threaded notch approximately in the longitudinal direction of the notch. Jet regulator according to one of Claims 1 to 19, characterized in that the thread profile of the external thread (2) protruding beyond the thread notch widens at least in some areas and preferably in a thread section on the downstream side. Jet regulator according to one of Claims 1 to 20, characterized in that the at least one cross-sectional widening (6; 7) protrudes in a flange-like manner on the outer circumference of the jet regulator housing (1). Jet regulator according to Claim 21, characterized in that the at least flange-like cross-sectional enlargement (6; 7) extends in the circumferential direction of the jet regulator housing via at least one drainage opening. Jet regulator according to one of Claims 1 to 22, characterized in that the at least one flange-like cross-sectional enlargement (6; 7) is provided on the outer circumference of the jet regulator housing between the external thread and the at least one drainage opening (22). Jet regulator according to one of Claims 1 to 23, characterized in that the flange-like cross-sectional expansion (7) is designed as an annular flange surrounding the jet regulator housing (1). Steel regulator according to one of claims 1 to 24, characterized in that the at least one flange-like Cross-sectional extension (6; 7) is designed as a screw-in stop which limits the screwing of the external thread (2) into the internal thread (3) in the water outlet (4) of the outlet fitting. Jet regulator according to one of Claims 1 to 25, characterized in that the jet regulator 127, 130) is designed without a sealing ring and does not require a sealing ring made of elastic material separately from the jet regulator housing (1). Jet regulator according to one of Claims 4 or 7 to 26, characterized in that the jet splitter is designed as a perforated plate which has splitter openings. Jet regulator according to Claim 27, characterized in that the splitting openings taper at least in regions in the direction of flow. Jet regulator according to one of Claims 4 to 28, characterized in that at least one insert part is connected downstream of the jet splitter at a distance in the direction of flow, which insert part has a lattice or network structure of webs crossing one another at intersections. Jet regulator according to one of Claims 11 to 29, characterized in that the grid or net structure (s) (23) provided in the at least one insert part and / or integrally formed on the guide wall (17) has / have flow openings (24) that have a honeycomb cell-shaped and / or hexagonal clear opening cross-section. Jet regulator according to one of the preceding claims, characterized characterized in that the lattice or net structure (s) provided in the at least one insert part and / or the lattice or net structure (s) formed in one piece on the guide wall (17) is / are formed from at least two concentrically circumferential webs, which are connected to a group of radial webs. Jet regulator according to one of the preceding claims, characterized in that the lattice or net structure (s) formed in one piece in the at least one insert part and / or the guide wall has / have a family of axially parallel first webs, which are at an angle thereto and preferably cross a set of axially parallel second webs arranged at right angles. Jet regulator according to one of the preceding claims, characterized in that the lattice or mesh structure (s) formed in one piece in the insert and / or the guide wall is / are formed by crossing webs which are arranged at an angle to one another that these lattices - Or network structure (s) is / are formed ornamentally from flow openings which are non-uniformly shaped in their clear opening cross-section.

Images