EP2597213B1 - Sanitary built-in part - Google Patents

Description

The invention relates to a sanitary fitting to which has a vented jet regulator or configured as such and has a mounting housing, which mounting housing has a thread for attachment to a provided at the water outlet of a sanitary outlet fitting mating thread and inserted into the at least one insert part up to an insertion stop wherein the mounting housing has a downstream housing end face with flow holes and wherein the peripheral wall of the mounting housing at least in an at least double-walled designed portion bounds at least one ventilation channel, which is open to the downstream housing end open and opens into at least one, leading into the housing interior of the mounting housing ventilation opening ..

Sanitary components are required as jet former, non-aerated jet regulator, jet aerator, flow regulator or non-return valve in various designs. For example, aerated jet regulators, so-called jet aerators, have been created to form a homogeneous, non-spattering and pearly-soft jet of water.

From the US 3424387 A already a sanitary fitting of the type mentioned is known, which is designed as a ventilated jet regulator. The previously known jet regulator has a sleeve-shaped installation housing, which has an internal thread on its inflow-side sleeve inner circumference, which is intended to be fastened to a counter-thread provided on the water outlet of a sanitary outlet fitting. In the sleeve interior of the sleeve-shaped installation housing at least one insert part can be used up to an insertion stop. The at least one insert part is designed as a jet splitter, which has to divide the incoming water flow into a plurality of individual jets, which are then enriched in the sleeve interior with ambient air and vented before the thus aerated water emerges as a homogeneous water jet through flow holes, which at a downstream housing end face the jet regulator housing are provided. In order to guide the ambient air needed for ventilation into the sleeve interior of the installation housing, the peripheral wall of the installation housing in a double-walled configured partial area surrounds a ventilation channel which is open towards the downstream housing end and opens into at least one ventilation opening leading into the housing interior of the installation housing.

A comparable aerated jet regulator, which has, however, at its jet regulator housing a specified for attachment to the water outlet of the outlet fitting external thread, is from the US 3827636 previously known. The disclosure of this document corresponds to the preamble of claim 1.

To remove the threads on the housings of the US 3424387 A and US 3827636 A previously known beam regulators are provided to screw on the water outlet an outlet fitting existing counter threads or unscrew must projecting the housing of the prior art jet regulator so far over the water outlet, that these housing can be detected and rotated on the above housing part area.

From the DE 20 2008 010 725 U1 already a jet regulator is already known, the outer peripheral side carries at its jet regulator housing, for example, an external thread which is releasably connectable with an internal thread on the water outlet of the outlet fitting. In order to operate the screw connection between the prior art jet regulator and the water outlet, a handle for manual detection of the jet regulator is provided on Aüslaufstirnendbereich of the prior art jet regulator, which can be designed as a bracket, forming the bracket ends mounted on the jet regulator housing pivot axis. However, such, pivotally mounted on the jet body handle requires a considerable effort.

From the DE 10 2008 050 247 A1 is a sanitary fixture previously known, which is intended as a regulating device for metering and fine throttling the amount of water flowing out per unit time. The previously known regulating device has a sleeve-shaped installation housing with an internal thread on the inlet-side sleeve inner circumference, which internal thread can be mounted on an external thread on the water outlet of the sanitary outlet fitting. The provided between the prior art fitting and the water outlet of the sanitary outlet fitting screw can be actuated, in which the mounting housing is detected on the outer peripheral side. In the installation housing, a throttle or regulating element is held helically adjustable in the axial direction. To be able to adjust this throttling or regulating element, a hexagon socket is on its downstream end face provided, which serves as a tool engagement surface for a turning tool.

From the WO 2010/017855 A1 One already knows a jet regulator with a jet regulator housing which can be used in a water outlet and is releasably held therein, for example by means of a screw connection. The jet regulator housing of the previously known jet regulator has a downstream housing part region, which has a housing outer circumference which is reduced in relation to the inflow-side housing partial region. In this case, the downstream housing part region can be used in an insertion opening of a rotary tool such that the rotary tool can be attached to a tool engagement surface in a rotationally fixed manner, which is provided approximately at the downstream end edge of the downstream housing part region.

From DE-GM 93 14 990 of the applicant, a jet aerator is previously known, which has in its installation housing serving as a beam splitter perforated plate having a number of flow holes for generating a plurality of individual jets. Pins are provided in the outflow region of the throughflow holes, whose free and conically tapering pin end pointing towards the perforated plate is designed as a deflection slope which deflects each of the individual beams coming from the throughflow holes obliquely to the flow direction. In order to mount the mounting housing of this known jet aerator on the water outlet of a sanitary outlet fitting, a sleeve-shaped outlet nozzle is provided, in which the installation housing can be used up to an insertion stop. At the outlet mouthpiece a thread is provided that can be screwed to a corresponding mating thread on the water outlet.

The external appearance of the outlet fitting is determined by the water outlet and the adjacent outlet nozzle and its screw connection at the water outlet. In order to create an aesthetically pleasing appearance, it is necessary to make the visible surfaces of the outlet mouthpiece on the one hand and the outlet fitting in the region of its water outlet on the other hand as uniform as possible. Nevertheless, there remains a narrow gap between the outlet nozzle and the jet regulator insert, which tends to be soiled and can have a disturbing effect.

It has therefore also provided a jet aerator serving as a sanitary fitting with a multipart installation housing that has an external thread on its outer circumference for screwing into a provided on the inner circumference of the water outlet of a sanitary outlet fitting internal thread (see. DE 10 2005 010 551 A1 ). On the installation housing downstream of a flow straightener is formed, which is designed as a, flow holes having perforated plate, which forms the downstream housing end face. In the housing interior of the mounting housing a plurality of lattice-shaped inserts are used, which serve as Strahlreguliereinrichtung, which has to form the ventilated inside the housing individual rays back to a homogeneous, non-squirting overall jet. The downstream housing front edge has a profiling, which can serve as a tool engagement surface of the corresponding profiling of a further installation housing used as a turning tool. Since the out DE 10 2005 010 551 A1 previously known jet aerator can be screwed so deep into the water outlet of a sanitary outlet fitting that the downstream housing end face of the mounting housing does not project beyond the water outlet of the outlet fitting, the aesthetic impression is determined solely by the outlet fitting. To the installation housing at side of the installation housing does not project beyond the water outlet of the outlet fitting, the aesthetic impression is determined solely by the outlet fitting. In order to mount or dismount the installation housing at the water outlet of the outlet fitting, but always another installation housing or other special turning tool is required, which is not always available, especially in a household.

From the US-A-4,534,513 is therefore also a jet regulator with a sleeve-shaped installation housing previously known, which carries at its downstream housing circumference an external thread with which the installation housing can be screwed to an inner peripheral side provided at the water outlet of the outlet fitting internal thread. The installation housing has a downstream housing end face, which is formed by superimposed layers of metal screens and which is guided displaceably in the housing interior of the installation housing. By applying this coin to the downstream end of the housing, the housing end side is advanced into the interior of the housing such that a slot receiving the coin on the narrow side is uncovered, which serves as a tool engagement surface for the coin used as a turning tool. However, the displaceability of the housing end face has the consequence that the flow conditions in the housing interior of the previously known jet regulator may change, so that the previously known jet regulator may not have consistent and in particular no consistent and in particular no consistently good beam quality and requires a large amount of installation space.

Similar jet regulators, which have on their downstream housing face tool engagement surfaces for a simple turning tool, are also from the WO 2006/005099 . WO 2006/094680 A1 , of the CH-PS 380042 , of the US 2002/0084353 A1 , of the US 3,014,667 and the US 4534514 previously known.

There is therefore a particular object to provide a sanitary fitting of the type mentioned above, which is characterized by ease of use and yet represents an at least equivalent alternative to the mountable with a spout fittings with regard to function and aesthetic appearance of the outlet fitting.

The achievement of this object is in the sanitary fitting of the type mentioned in particular that the downstream housing front is convex or convex curved in the outflow direction and has at least one slot whose opposite slot longitudinal sides as turning or tool engagement surfaces for a in the at least a slot insertable rotary tool are configured, and that the inner housing wall protrudes beyond the outer housing wall and forms the downstream housing end edge.

The built-in part according to the invention has a one- or multi-part installation housing, which has an external thread on its housing outer circumference, which is intended for screwing into a provided on the inner circumference of the water outlet of a sanitary outlet fitting internal thread. With the help of the outer housing provided on the housing thread, the fitting according to the invention can be screwed into the internal thread of the water outlet.

The peripheral wall of the installation housing defines at least in an at least double-walled configured portion of at least one ventilation duct, which is open to the downstream housing end side and which opens into at least one, leading into the housing interior of the installation housing ventilation opening. Thus, ambient air can be sucked in through the ventilation channel which is open towards the downstream housing front side and introduced into the housing interior via the at least one ventilation opening, where this ambient air is mixed with the water, which may have been provisionally separated into individual jets, in order to produce a pearly-soft water flow. Since the at least one ventilation channel is integrated into the circumferential wall of the installation housing, the installation part according to the invention can be mounted with its external thread in such internal threads, which are also intended to receive an outlet nozzle. It can thus be used either on a conventional jet regulator, which requires an outlet nozzle for mounting, or it can instead be used according to the invention the built-in part, which is no longer dependent on an outlet nozzle. Since the fitting according to the invention is no longer dependent on an outlet nozzle, and since such an outlet mouthpiece was usually made of brass and the manufacturing process had a final chromium plating of the brass part required, the costs associated with the procurement of such material materials are avoided, the material supply regardless Ensured this metal and can be dispensed with a polluting chromium plating process.

According to the invention, it is provided that the downstream end face of the housing is convexly or convexly curved in the outflow direction and has at least one slot, the opposite slot longitudinal sides are designed as a turning or tool engagement surfaces for a releasably insertable in the at least one slot rotary tool.

The fitting according to the invention thus has on its downstream housing end face at least one slot, the opposite slot longitudinal sides are designed as a rotary control surfaces or tool engagement surfaces for a, in the at least one slot releasably insertable rotary tool. In this case, the downstream housing front side is formed in the outflow such convex or convex curved that the slot can be made sufficiently deep to provide the rotary tool on the corresponding deep slot longitudinal sides a sufficient turning or tool engagement surface, without thereby excessively large space in the housing interior get lost.

In order to be able to form the water jet emerging from the built-in part well, without the downstream end of the housing offering a high flow resistance, it is expedient for the downstream end of the housing to be designed as a grid, mesh or hole structure.

The at least one slot can be designed as a slot-shaped opening of the housing end face. A preferred embodiment according to the invention, in contrast, provides that the at least one slot has a slot or groove bottom, which is closed or - for example, by a slot or groove bottom forming hole or grid structure - open or liquid-permeable designed.

In order to make the serving as a turning or tool engagement surfaces slot longitudinal sides sufficiently stable, and order To be able to transmit a correspondingly high torque to these slot longitudinal sides, it is advantageous if the housing end face has a cross-sectional thickening at least in the region of the at least one slot.

It is particularly advantageous if the slot longitudinal sides have a greater wall thickness in comparison with the flow guide walls forming the grid, mesh or hole structure of the housing end face.

It may be expedient if the installation housing has a downstream housing section with a housing cross-section reduced relative to an adjacent inflow-side housing section, and if a free end edge of the housing section projecting above the water outlet serves as a drip edge.

A designed according to this invention proposal sanitary fitting has a downstream housing portion which has a relation to the adjacent inflow-side housing portion reduced housing cross-section. In this case, the free end edge of the over the water outlet projecting outflow side housing section is ausgestaltext as dripping edge on which the remaining water can still drain after closing the stopcock without overflowing on the outside of the outlet fitting and run along there.

In order to be able to uniformly mix the water flowing through the insert according to the invention over its entire cross section with ambient air, it is advantageous if a plurality of ventilation openings, preferably uniformly distributed over the housing circumference, are provided.

To the at least one ventilation duct with little effort to accommodate in the peripheral wall of the mounting housing, it is advantageous if the mounting housing has at least in a downstream housing portion an outer, at least a portion of the outer thread bearing housing wall and a spaced by the at least one ventilation duct inner housing wall.

In this case, the inner housing wall can also be configured as a drip edge when the inner housing wall projects beyond the outer housing wall and forms the downstream housing front edge.

In order to screw the fitting according to the invention well with a corresponding turning tool on the inside of an outlet fitting provided inside circumference female thread, it is advantageous if the inner and the outer housing are preferably connected to each other via radial webs and if at least two webs as turning or tool engagement surfaces are provided for an insertable into the space between the webs rotary tool.

Thus, the water flowing through pressure can be regulated independently of pressure to a maximum water volume per unit time, it is advantageous if the mounting part has a flow rate regulator, which is connected upstream of the aerated jet regulator in the flow direction.

In order that the dirt particles entrained in the water do not lead to functional impairments in the successive functional units of the built-in component according to the invention, it is expedient if the preferably aerated jet regulator and optionally the flow rate regulator Front screen is upstream in the flow direction.

In order to avoid leakage currents on the outer circumference of the installation housing over, it is advantageous if an annular seal made of preferably soft elastic material is provided for axial sealing between the mounting part and an annular outlet located in the water outlet.

Further features of the invention will become apparent from the following description of inventive embodiments in conjunction with the claims and the drawings. The individual features may be implemented individually or in combination in an embodiment according to the invention.

Fig. 1

ein Einbauteil in einem Längsschnitt, an dessen Einbaugehäuse eine abströmseitige Gehäusestirnseite einstückig angeformt ist, die einen radial orientierten Schlitz aufweist, dessen Schlitz-Längsseiten als Drehangriffsfläche beispielsweise für eine: in den Schlitz eingeführte und als Drehwerkzeug verwendete Münze dienen,

Fig. 2

das Einbauteil aus Figur 1 in einer Draufsicht auf seine Auslaufstirnseite,

Fig. 3

das Einbauteil aus Figur 1 und 2 in einer Draufsicht auf seine zuströmseitige Stirnseite,

Fig. 4

das Einbauteil aus den Figuren 1 bis 3 in einer perspektivischen Seitenansicht,

Fig. 5

das Einbauteil aus den Figuren 1 bis 4 in einer perspektivischen Einzelteildarstellung,

Fig. 6

das Einbauteil aus den Figuren 1 bis 5 in einem perspektivischen Teil-Längsschnitt,

Fig. 7

ein mit Figur 1 bis 6 vergleichbares Einbauteil, das an der abströmseitigen Gehäusestirnseite seines Einbaugehäuses zwei einander rechtwinklig kreuzende Schlitze hat, die einen Kreuzsschlitz bilden,

Fig. 8

das Einbauteil aus Figur 7 in einer Draufsicht auf seine Auslaufstirnseite,

Fig. 9

das Einbauteil aus Figur 7 und 8 in einer Draufsicht auf seine zuströmseitige Stirnseite,

Fig. 10

das Einbauteil aus den Figuren 7 bis 9 in einer perspektivischen Draufsicht auf seine Auslaufstirnseite,

Fig. 11

das Einbauteil aus den Figuren 7 bis 10 in einer perspektivischen Einzelteildarstellung,

Fig. 12

das Einbauteil aus den Figuren 7 bis 11 in einem perspektivischen Teil-Längsschnitt, und

Fig. 13

ein als Strahlregler ausgebildetes und mit dem Einbauteil in Figur 1 bis 6 vergleichbares Einbauteil in einem Längsschnitt, wobei der Strahlregler hier einen Strahlzerleger hat, der als Lochplatte ausgebildet ist, die eine Vielzahl axialer Durchflusslöcher aufweist, um das zuströmende Wasser in eine entsprechende Anzahl von Einzelstrahlen aufzuteilen.

It shows:

Fig. 1

a built-in part in a longitudinal section, on the housing housing a downstream housing end face is integrally formed, having a radially oriented slot, the slot longitudinal sides serve as a rotary control surface, for example for a: inserted into the slot and used as a turning tool coin,

Fig. 2

the built-in part FIG. 1 in a plan view of its outlet end face,

Fig. 3

the built-in part FIGS. 1 and 2 in a plan view of its inflow-side end face,

Fig. 4

the built-in part of the FIGS. 1 to 3 in a perspective side view,

Fig. 5

the built-in part of the FIGS. 1 to 4 in a perspective detail view,

Fig. 6

the built-in part of the FIGS. 1 to 5 in a perspective partial longitudinal section,

Fig. 7

one with Figure 1 to 6 comparable fitting which has at the downstream housing front side of its installation housing two mutually perpendicular crossing slots which form a cross slot,

Fig. 8

the built-in part FIG. 7 in a plan view of its outlet end face,

Fig. 9

the built-in part FIGS. 7 and 8 in a plan view of its inflow-side end face,

Fig. 10

the built-in part of the FIGS. 7 to 9 in a perspective plan view of its outlet end face,

Fig. 11

the built-in part of the FIGS. 7 to 10 in a perspective detail view,

Fig. 12

the built-in part of the FIGS. 7 to 11 in a perspective partial longitudinal section, and

Fig. 13

a designed as a jet regulator and with the built-in in Figure 1 to 6 Comparable fitting in a longitudinal section, wherein the jet regulator here has a jet splitter, which is designed as a perforated plate having a plurality of axial flow holes to divide the incoming water into a corresponding number of individual jets.

In the FIGS. 1 to 13 is a sanitary fitting in various versions 5, 6 and 7 shown. The built-in parts 5, 6 and 7 shown here can be mounted on the water outlet 70 of a sanitary outlet fitting 8 not otherwise shown here. The built-in parts 5, 6 and 7 have a mounting housing 9, which has an external thread 10 on its outer circumference. The external thread 10 is intended for screwing into an internal thread 11, which is provided on the inner circumference of the water outlet 70 of the sanitary outlet fitting 8. The installation housing 9 has a downstream housing end 12 with flow holes 13.

The peripheral wall of the installation housing 9 of the built-in parts 5, 6 and 7 delimited in a double-walled designed partial area an annular peripheral ventilation duct 14. This ventilation duct 14, which is open to the downstream, in the figures lower housing end side 12, opens into a plurality of ventilation openings 15, which are arranged distributed uniformly over the housing circumference and lead into the housing interior of the installation housing 9. The ventilation channel 14 and the ventilation openings 15 are part of a built-in parts 5 and 6 beam regulator 16, a so-called Strahlbelüfters. In contrast, the installation element 7 itself is designed as a jet regulator.

The installation housing 9 of the built-in parts 5, 6 and 7 has in its downstream housing section an outer housing wall 17 and a spaced apart by the ventilation channel 14 inner housing wall 18, of which the inner housing wall 18 projects beyond the outer housing 17 and the downstream housing end edge forms. The outer housing wall 17 carries at least a portion of the external thread 10. The inner and outer housing 17, 18 are connected to each other via radial webs 19, wherein the webs 19 provided as a turning or tool engagement surface for an insertable into the space between the webs 19 rotary tool are.

However, since such a special turning tool is not always available, especially in a private household, the downstream housing end face 12 of the built-in parts 5, 6 and 7 shown in FIGS. 1 to 13 has at least one slot 20, 21 whose opposite slot longitudinal sides act as Turning or tool engagement surfaces are designed for a rotary tool, which is releasably insertable into the at least one slot 20 and 21 respectively. As a turning tool, a screwdriver, but preferably also serve a coin. So that with the help of the insertable into the slot 20, 21 rotary tool and a higher torque can be transmitted, the downstream housing end 12 in the outflow convex or convex, so that the slot longitudinal sides are preferably designed deep without the housing end face 12 in the Housing interior space would significantly limit available space. In the housing interior is thus sufficient space to further insert or flow shaping parts 47, 48 provided therein (see. Fig. 13 ). While the jet regulator 5 according to the FIGS. 1 to 6 only carries an approximately radially oriented slot 20 on its housing end face are on the housing end face 12 of the in the FIGS. 7 to 12 shown mounting parts 6 two radially oriented and arranged at right angles to each other slots 20, 21 are provided, which form a cross slot here.

In the installation housing 9 of the mounting parts 5, 6 and 7, at least one insert part can be used up to an insertion stop. So will the FIGS. 1 to 12 clearly that in the installation housing 9 of the built-in parts 5, 6 and 7, a trained as a beam splitter insert part can be used, which has to divide the water flow into a plurality of individual jets and to a plurality of flow openings 22 has. The serving as a beam splitter insert part is here as a diffuser 23 forms, which has a flow opening 22 bearing ring wall 24. To the annular wall 24 of the cup-shaped diffuser 23 here, a central baffle 25 is formed, which deflects the inflowing water flow in the direction of the peripheral flow openings 22.

The diffuser 23 is encompassed by a diffuser ring 26 such that between the inner circumference of the diffuser ring 26 and the outer circumference of the diffuser 23, a flow channel 30 tapering in the direction of flow is provided. The ventilation openings 15 are covered by the diffuser ring 26 at a distance such that the adjacent portion of the diffuser ring 26 serves as a splash guard 27 for the ventilation openings 15 against the water flowing on the inner circumference of the diffuser ring 26.

The diffuser ring 26 of the built-in parts 2, 5 and 6 has air flow openings 29, which narrow in the flow direction to an air flow slot. The ambient air can thus be sucked through the ventilation channel 14 through the ventilation openings 15 in the peripheral wall and the Luftdurchströmöffnungen 29 in the diffuser ring 26 into the housing interior of the mounting housing 9 to mix there with the individual beams generated by the diffuser 23 before they again at the serving as a flow straightener housing front page 12 to be united and formed into a homogeneous, non-spraying and bead-soft aerated overall jet.

The integrated into the built-in parts 5 and 6 jet regulator 16 thus consists essentially of the diffuser 23, the associated diffuser ring 26, and designed as a flow rectifier housing end face 12 of the mounting housing. 9

While in the built-in parts 5 and 6 of the jet disintegrator is designed as a diffuser 23, which designed as a jet regulator built-in part 7 in FIG. 13 Instead, a beam splitter, which is designed as a perforated plate 40, which has a corresponding number of axial flow holes 41 for dividing the inflowing water into a plurality of individual jets.

In order to suck the ambient air into the housing interior and to be able to generate a negative pressure in the housing interior, an annular flow passage 30 tapering in the direction of flow is provided between the inner circumference of the diffuser ring 26 and the outer circumference of the diffuser 23. In this tapered flow channel 30, the separated individual streams in the diffuser 23 are accelerated such that on the downstream side of the diffuser 23 in the region of the downstream channel opening of the flow channel 30, a negative pressure.

Also at the in FIG. 13 the built-in part 7, the passage cross-section in the flow holes 41 of the perforated plate 40 is narrowed such that the individual beams generated by the perforated plate 40 are accelerated so that even on the downstream side of the perforated plate 40, a negative pressure.

While the diffuser ring 26 can be inserted into the installation housing 9 up to an insertion stop 31, the diffuser 23 in turn can be inserted into the diffuser ring 26 up to an insertion stop 32. In this case, a sealing ring 33 is preferably made of soft elastic material, which seals the separating gaps between the housing 9 and the housing 26 and diffuser between diffuser 26 and diffuser 23 and the axial sealing between the inflow-side end edge of the mounting housing 9 and an annular shoulder in the water outlet 7 of the sanitary outlet fitting. 8 can be clamped.

In the Fig. 1 to 12 It can be seen that the jet regulator of the built-in parts 5 and 6, a flow rate controller 34 is connected upstream, which has an annular throttle body 35 made of elastic material, which throttle body 35 between itself and a Regelprofilierung 36 a changed under the pressure of the water flowing through the control gap 37. This flow rate regulator 34 is connected via a latching connection with the jet regulator 16 following in the flow direction and in particular with its diffuser 23. The flow rate regulator 34, in turn, is preceded by an attachment screen 38, which conically tapers counter to the flow direction, and has to filter out the dirt particles entrained in the water before these dirt particles can impair the function of the flow rate regulator 34 or the downstream jet regulator. A comparable attachment screen 38 is also provided in front of the installation part 7.

The built-in part 5, 6 and 7 shown here can be screwed with its provided on the housing housing 9 external thread 10 in the internal thread 11 at the water outlet 7 a sanitary outlet fitting, otherwise for mounting required for a commercial jet regulator 3 outlet nozzle 28 is required. In this way it is possible to use the outlet fitting either in conjunction with an outlet nozzle 28 and a commercial jet regulator 3 used therein or in conjunction with one of the built-in parts 5, 6 and 7 according to the invention.

Claims (12)

1. Sanitary installation part (5, 6, 7) which comprises a ventilated aerator or is formed as such and has an installation housing (9), which installation housing (9) has a thread (10) for fastening to a counter thread (11) provided on the water outlet (70) of a sanitary outlet fitting (8), and into which installation housing (9) at least one insert part can be inserted as far as an insert stop, wherein the installation housing (9) has an outflow-side housing end face (12) with through-flow holes (13), and wherein the peripheral wall of the installation housing (9) bounds at least one ventilation channel (14) at least in a partial region which is at least double-walled, which (14) is open towards the outflow-side housing end face (12) and issues into at least one ventilation opening (15) leading into the housing interior of the installation housing (9), characterised in that the outflow-side end face (12) is convexly or spherically domed in the outflow direction and comprises at least one slit (20, 21), the opposing long sides of which slit are formed as rotational or tool engagement surfaces for a rotary tool, which can be inserted into the at least one slit (20, 21) and is intended for attachment of the sanitary installation part to a water outlet (7) of a sanitary outlet fitting (8), and that the inner housing wall (18) protrudes beyond the outer housing wall (17) and forms the outflow-side housing end edge.
2. Installation part as claimed in claim 1, characterised in that the thread provided on the installation housing is formed as an outer thread which is disposed on the outer periphery of the housing and which cooperates with an inner thread located on the inner periphery of the water outlet and provided as a counter thread.
3. Installation part as claimed in claim 1 or 2, characterised in that the outflow-side housing end face (12) is formed as a grating, net or perforated structure.
4. Installation part as claimed in claim 2 or 3, characterised in that at least one slit (20, 21) has a slit bottom or groove bottom which is closed or is open or liquid-permeable preferably by means of a perforated or grating structure forming the slit bottom or groove bottom.
5. Installation part as claimed in claim 3 or 4, characterised in that the housing end face (12) has a transverse thickening at least in the region of the at least one slit (20, 21) and/or that the long sides of the at least one slit (20, 21) have a greater wall thickness compared to the flow-guiding walls (46) forming the grating, net or perforated structure of the outflow-side housing end face (12).
6. Installation part as claimed in any one of claims 1 to 5, characterised in that the installation housing (9) has an outflow-side housing portion with a housing cross-section which is reduced with respect to an adjoining inflow-side housing portion and that a free end edge of the outflow-side housing portion protruding beyond the water outlet (7) serves as a drip edge.
7. Installation part as claimed in any one of claims 1 to 6, characterised in that a plurality of ventilation openings (15) disposed distributed preferably uniformly over the housing periphery are provided.
8. Installation part as claimed in any one of claims 1 to 7, characterised in that, at least in one outflow-side housing portion, the installation housing (9) has an outer housing wall (17), which bears at least a partial portion of the outer thread (10), and an inner housing wall (18) spaced apart by the at least one ventilation channel (14).
9. Installation part as claimed in claim 8, characterised in that the inner and outer housing wall (18, 17) are connected to one another via preferably radial webs (19) and that at least two webs (19) are provided as rotational or tool engagement surfaces for a rotary tool which can be introduced into the free space between the webs (19).
10. Installation part as claimed in any one of claims 1 to 9, characterised in that the installation part (5, 6) has a through-flow quantity regulator (34) and/or a throttle plate which is connected upstream of the ventilated aerator in the flow direction.
11. Installation part as claimed in any one of claims 1 to 10, characterised in that an ancillary screen (38) is connected upstream of the preferably ventilated aerator and possibly the through-flow quantity regulator (34) in the flow direction.
12. Installation part as claimed in any one of claims 1 to 11, characterised in that an annular seal (33) of preferably flexible material is provided for axial sealing between the installation part and an annular shoulder located in the water outlet (7).

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