EP3708723B1 - Jet regulator - Google Patents

Description

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

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 we already know a jet regulator that 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 known jet regulator and insofar as a negative pressure is created at its at least one ventilation opening, the known jet regulator is able to entrain part 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, which receives the jet regulator, has an annular groove below its external thread in the screwing-in direction for receiving a sealing ring, which annular groove is followed by 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 enlargement that 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 on 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 at the outset, the inventive solution to this object 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 inventive proposal 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 end 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 end 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 reaches the outflow-side front peripheral edge area of the jet regulator housing, is collected there in an annular drainage space which is formed between the outflow-side housing front 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 ring 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 lower manufacturing costs 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.

So that the aerator can 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. In this case, at least two adjacent housing parts of the jet regulator housing can subsequently 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 one of the inflowing water 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 surrounds 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 further 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 arranged on the downstream side of the housing to the inside of the housing. 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 end 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 accumulated 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 part 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 into the interior of the jet ventilator housing through the ventilation duct 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 lattice or net structure is integrally formed on the guide wall on the outflow side from webs crossing each other at intersections. Thus, this outflow-side grid or network structure, which can also serve as a flow straightener, which combines the water mixed with the ambient air in particular into a homogeneously flowing water jet, - and the structures behind it inside the housing, cannot be pushed upwards against the direction of flow of the water.

In order to be able to screw the jet regulator according to the invention in a simple way 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 grid 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 that runs continuously around a cylindrical wall, 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 outflow side. In this embodiment, the external thread with its conically flared 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 as far as 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.

However, it is also possible 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 can cut deeply into the internal thread in a sealing manner with this outflow-widening thread section.

In order to provide a cross-sectional expansion on the outer 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 amount of leakage water can seep into the drainage annulus, it is useful if the at least one flange-like cross-sectional expansion 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 expansion 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 embodiment with a different design 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 at a distance in the flow direction, which insert part is a grid - or has a network structure of webs crossing one another at intersection nodes.

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

In contrast, a differently designed embodiment provides that the grid or net structure (s) provided in 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 group 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 / or the lattice or mesh structure (s) formed in one piece with a group of axially parallel first Has webs which intersect with a set of axially parallel second webs which are arranged at an angle 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.

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.

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:
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 channel running around the inside of the housing in a ring-shaped manner, with flange-like cross-sectional enlargements 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, whereby the jet regulator shown here has a flange-like cross-sectional enlargement which is arranged above drainage openings and which 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 exiting 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 works 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 widening 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 on the end face 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 ring 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 sealed 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 ring 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 end.

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 large number of splitter openings and is integrally formed in the second housing part. In the of the perforated plate oriented transversely to the direction of flow, cross-sectional constrictions that are preferably tapered in the direction of flow 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 interior 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 mesh structure of webs crossing each other at intersections. In the grid or net structure of these insert parts, the incoming water is also divided up 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 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 interior of the housing.

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 ring opening 16, the ambient air from outside through the ventilation duct 18 into the mixing zone 20 Part of the interior of the housing 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 edge of the jet regulator housing 1 is designed as a lip seal 21, which 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, which is 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 exiting the drainage annular space 8 via the drainage openings 22 and lead it into the interior of the housing, where it mixes with the water flowing through there.

On the outflow side, a lattice or net structure 23 is integrally formed on the guide wall 17 from webs crossing one another at intersection nodes. 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 longer 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 engagement 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 walls of the slot. These longitudinal walls of the slot 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 of the external thread on the downstream side almost completely closes the associated thread notch of the internal thread, 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 outer circumference of the housing, 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 housing 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 beyond the adjoining areas of the jet regulator housing, which is made of the same material as the housing section of the jet regulator housing that carries the external thread and is formed in one piece on it and at the water outlet rests on the inner circumference with a seal 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 over 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 thereon, on its outer circumference of the housing, 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 flange-like in the jet regulators 127 and 130 and extend in the circumferential direction 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 widening 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 here 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 end 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 the 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

12th

Jet splitter insert

13th

Butcher openings

14th

Pot bottom

15th

Annular gap (in the jet splitter)

16

Ring opening (of the annular gap 15)

17th

Guide wall

18th

Ventilation duct

19th

Channel opening

20th

Mixing zone

21

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)

1. Jet regulator (127, 130) having a jet regulator housing (1) which (1), on its housing outer circumference, has an outer thread (2) for screwing into an inner thread (3) in the water outlet of a sanitary outlet fitting, wherein the jet regulator housing (1) has, on its housing outer circumference, at least one cross-sectional widening (6, 7) which is made of the same material as the housing portion of the jet regulator housing (1) supporting the outer thread (2) and which is formed integrally thereon, and which can bear sealingly on the water outlet (4) at the end face and/or at the inner circumference, characterized in that a housing sub-region of the jet regulator housing (1), disposed on the outflow side of the outer thread (2), is angled in the direction towards the inner circumference of the water outlet (4) in such a way that a drainage annular space (8) is formed between this housing sub-region and the inner circumference of the water outlet.
2. Jet regulator according to Claim 1, characterized in that the jet regulator (127, 130) is configured as a jet aerator which mixes the water flowing therethrough with ambient air and which for this purpose, in a housing portion of the jet regulator housing (1) disposed on the outflow side of the outer thread (2), has at least one aeration opening (9) that is provided on the housing circumference or on the housing end face of the jet regulator housing (1).
3. Jet regulator according to Claim 1 or 2, characterized in that the jet regulator housing (1) has at least two housing parts (10, 11) that are connectable to each other, preferably releasably.
4. Jet regulator according to either of Claims 2 and 3, characterized in that a first housing part (10) disposed on the outflow side supports the outer thread (2) .
5. Jet regulator according to Claim 4, characterized in that the outflow-side first housing part (10) is connectable on the inflow side to a second housing part (11) of the jet regulator housing (1), preferably releasably connectable, which second housing part (11) supports a jet splitter which splits the water flowing therethrough into a multiplicity of individual jets.
6. Jet regulator according to Claim 5, characterized in that the jet splitter is designed as a diffuser which has a cup-shaped jet splitter insert (12) which (12), on the cup circumference of its cup shape, has a plurality of splitter openings (13), and which (12) has a cup base (14) configured as an impact face that deflects the inflowing water towards the splitter openings (13).
7. Jet regulator according to Claim 6, characterized in that the second housing part (11) engages around the jet splitter insert (12), and in that the second housing part (11) tapers, at least in the region of the cylinder openings (13), in such a way that an annular gap (15) is formed between the jet splitter insert (12) and the housing inner circumference of the second housing part (11), which (15) tapers on the outflow side towards an annular opening (16) that opens into the housing interior.
8. 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 in that at least one aeration duct (18) is provided between the housing inner circumference of the jet regulator housing (1) and the guide wall (17), which (18) leads to the housing interior from at least one aeration opening (9) disposed on the housing outflow side.
9. Jet regulator according to Claim 8, characterized in that the outflow-side housing end edge of the jet regulator housing (1) is configured as a lip seal (21), and in that the lip seal (21) bears on the inner circumference of the water outlet (4) or lies close to the inner circumference of the water outlet (4).
10. Jet regulator according to Claim 8 or 9, characterized in that at least one drainage opening (22) is provided in the sub-region of the housing wall of the jet regulator housing (1) disposed between the outflow-side housing end face and the outer thread (2), which drainage opening (22) leads from the drainage annular space (8) to the aeration duct (18) or to at least one of the aeration ducts (18).
11. Jet regulator according to one of Claims 7 to 10, characterized in that a mesh or net structure (23) composed of webs that intersect one another at intersection nodes is formed integrally on the guide wall (17) on the outflow side.
12. Jet regulator according to one of Claims 7 to 11, characterized in that the guide wall (17) is connected in a rotationally fixed and in particular integral manner to the jet regulator housing (1) and in particular to the first housing part (10) on the outflow side, and in that at least one tool engagement face for a driving tool is provided on the guide wall (17) and/or on the mesh or net structure (23).
13. Jet regulator according to Claim 12, characterized in that at least one slit-shaped recess (29) for the insertion of a coin used as the driving tool, or of another driving tool, is provided in the mesh or net structure, which recess (29) is delimited by opposite slit longitudinal walls that form tool engagement faces for the driving tool.
14. Jet regulator according to one of Claims 1 to 13, characterized in that the outer envelope body, formed by the outer thread (2) on the jet regulator housing (1) intended to be screwed into the cylindrical inner thread, widens preferably conically towards the outflow side.
15. Jet regulator according to one of Claims 1 to 14, characterized in that at least one moulding which serves as a liquids bulkhead and which projects into at least one thread groove of the outer thread (2) is provided on the housing outer circumference of the jet regulator housing (1).
16. Jet regulator according to Claim 15, characterized in that the at least one moulding reaches as far as the envelope body enveloping the outer thread (2) or at least in regions projects beyond this envelope body.
17. Jet regulator according to Claim 15 or 16, characterized in that the at least one moulding is configured as a separation wall that extends across at least two neighbouring thread grooves of the outer thread.
18. Jet regulator according to Claim 17, characterized in that the at least one separation wall runs approximately axially parallel to the housing longitudinal axis of the jet regulator housing (1).
19. Jet regulator according to one of Claims 1 to 18, characterized in that the at least one moulding is configured to be cam-shaped, and in that the cam-shaped moulding in the thread groove extends approximately in the groove longitudinal direction.
20. Jet regulator according to one of Claims 1 to 19, characterized in that the thread profile of the outer thread (2), projecting beyond the thread groove, widens at least in regions and preferably in an outflow-side thread portion.
21. Jet regulator according to one of Claims 1 to 20, characterized in that the at least one cross-sectional widening (6; 7) projects like a flange on the housing outer circumference of the jet regulator housing (1).
22. Jet regulator according to Claim 21, characterized in that the at least one flange-like cross-sectional widening (6; 7) extends, in the housing circumferential direction of the jet regulator housing, across at least one drainage opening.
23. Jet regulator according to either of Claims 21 and 22, characterized in that the at least one flange-like cross-sectional widening (6; 7) on the housing outer circumference of the jet regulator housing is provided between the outer thread and the at least one drainage opening (22).
24. Jet regulator according to one of Claims 21 to 23, characterized in that the at least one flange-like cross-sectional widening (7) is configured as an annular flange that encircles the jet regulator housing (1).
25. Jet regulator according to one of Claims 21 to 24, characterized in that the at least one flange-like cross-sectional widening (6; 7) is configured as a screw-in abutment which limits the screwing of the outer thread (2) into the inner thread (3) in the water outlet (4) of the outlet fitting.
26. Jet regulator according to one of Claims 1 to 25, characterized in that the jet regulator (127, 130) is designed free of a sealing ring and makes do without a sealing ring of elastic material produced separately from the jet regulator housing (1).
27. 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.
28. Jet regulator according to Claim 27, characterized in that the splitter openings taper, at least in regions, in the throughflow direction.
29. Jet regulator according to one of Claims 4 to 28, characterized in that at least one insert part is arranged at a distance downstream from the jet splitter in the flow direction, which insert part has a mesh or net structure composed of webs that intersect one another at intersection nodes.
30. Jet regulator according to Claims 11 and 29, characterized in that the mesh or net structure(s) (23) provided in the at least one insert part and/or formed integrally on the guide wall (17) has/have throughflow openings (24) which have a honeycomb-shaped and/or hexagonal clear opening cross section.
31. Jet regulator according to Claims 11 and 29, characterized in that the mesh or net structure(s) provided in the at least one insert part and/or formed integrally on the guide wall (17) is/are formed from at least two concentrically encircling webs which are connected to a group of radial webs.
32. Jet regulator according to Claims 11 and 29, characterized in that the mesh or net structure(s) provided in the at least one insert part and/or formed integrally on the guide wall has/have a group of axially parallel first webs which intersect a group of axially parallel second webs which are disposed at an angle and preferably at a right angle in relation to said group of axially parallel first webs.
33. Jet regulator according to Claims 11 and 29, characterized in that the mesh or net structure(s) provided in the insert part and/or formed integrally on the guide wall is/are formed by mutually intersecting webs which are disposed at an angle to each other in such a way that said mesh or net structure (s) is/are formed ornamentally from throughflow openings that are non-uniformly shaped in terms of their clear opening cross section.

Images