Jet regulator

Abstract

The invention relates to a sanitary installation component (6) with an installation housing (9) having a thread (10) for attachment to a mating thread provided at the water outlet of a sanitary outlet fitting, wherein the installation housing (9) has a downstream end face (12) with flow holes (13) and wherein at least one insert can be inserted into the installation housing (9) up to an insertion stop. According to one of the solutions described herein, the installation component (6) has or is designed as a vented aerator (16), the circumferential wall of the installation housing (9) encloses at least one ventilation channel (14) in at least one double-walled section, and the at least one ventilation channel (14), which is open towards the downstream end face (12), opens into at least one ventilation opening (15) leading into the interior of the installation housing.The downstream rectifier (12) can be convex and provided with a slot (20,21) which serves to screw the aerator into the fitting, e.g. by means of a coin.

Description

[0001] The invention relates to a sanitary installation component according to claim 1 with an installation housing having a thread for attachment to a mating thread provided at the water outlet of a sanitary outlet fitting, wherein the installation housing has a downstream end face with flow holes and wherein at least one insert can be inserted into the installation housing up to an insertion stop, wherein the installation component has a vented aerator or is designed as such, wherein the circumferential wall of the installation housing at least in a section which is at least double-walled encloses at least one ventilation channel and wherein the at least one ventilation channel, open towards the downstream end face of the housing, opens into at least one ventilation opening leading into the interior of the installation housing, wherein the thread provided on the installation housing is designed as an external thread arranged on the outer circumference of the housing.which interacts with an internal thread located on the inner circumference of the water outlet and designed as a mating thread, and wherein the installation housing has, at least in a downstream housing section, an outer housing wall supporting at least a partial section of the external thread and an inner housing wall spaced apart by at least one ventilation channel. Sanitary installation components are required in a wide variety of designs as aerators, unventilated aerators, jet aerators, flow regulators, or backflow preventers. For example, ventilated aerators, so-called jet aerators, have also been developed, which are intended to form a homogeneous, non-splashing, and gently aerated water jet.

[0002] From German patent DE-GM 93 14 990 of the applicant, a jet aerator is known which has a perforated plate in its mounting housing that serves as a jet splitter and has a number of flow holes to generate a multitude of individual jets. Pins are provided in the outflow area of ​​the flow holes, the free and conically tapered end of which, pointing towards the perforated plate, is designed as a deflecting chamfer that deflects each of the individual jets coming from the flow holes obliquely to the direction of flow. In order to mount the mounting housing of this known jet aerator to the water outlet of a sanitary outlet fitting, a sleeve-shaped outlet nozzle is provided into which the mounting housing can be inserted up to an insertion stop. The outlet nozzle has a thread that can be screwed into a corresponding mating thread on the water outlet.

[0003] The external appearance of the faucet is determined by the water outlet and the adjacent spout, including its screw connection. To create an aesthetically pleasing appearance, it is necessary to design the visible surfaces of the spout and the faucet itself, particularly in the area of ​​the water outlet, as uniformly as possible. Nevertheless, a narrow gap remains between the spout and the aerator insert, which is prone to dirt accumulation and can be visually distracting.

[0004] Therefore, a sanitary installation component, also serving as a jet aerator, was created with a multi-part housing. This housing has an external thread on its outer circumference for screwing into an internal thread provided on the inner circumference of the water outlet of a sanitary fitting (see DE 10 2005 010 551 A1). A flow straightener is integrally formed on the downstream side of the housing. This straightener is designed as a perforated plate with flow holes, forming the downstream end face of the housing. Several grid-shaped inserts can be placed inside the housing. These inserts act as a jet regulating device, which reshapes the individual jets aerated inside the housing into a homogeneous, non-splashing jet.The downstream end face of the housing has a profile that can serve as a tool engagement surface for a corresponding profile of another mounting housing used as a turning tool. Since the jet aerator known from DE 10 2005 010 551 A1 can be screwed so deeply into the water outlet of a sanitary fitting that the downstream end face of the mounting housing does not protrude beyond the water outlet of the fitting, the aesthetic appearance is determined solely by the fitting. However, to mount or dismount the mounting housing on the water outlet of the fitting, another mounting housing or a special turning tool is always required, which is not always readily available, especially in a household.

[0005] From US patent A-4,534,513, a flow regulator with a sleeve-shaped housing is also known. The housing has an external thread on its downstream circumference, allowing it to be screwed onto an internal thread on the inner circumference of the water outlet of the fitting. The housing has a downstream end face formed by superimposed layers of metal screens, which is slidably guided within the housing. By striking this downstream end face with a coin, the end face is pushed into the housing interior, exposing a slot that receives the coin and serves as a tool engagement surface for the coin used as a turning tool.However, the displacement of the housing end face means that the flow conditions inside the housing of the known aerator can change, so that the known aerator may not have a consistent and, in particular, a consistently good jet quality and requires a lot of installation space.

[0006] A ventilated aerator of the type mentioned above is already known from WO 2010 / 017855 A1. This aerator has a housing in which a double-walled section of its perimeter wall encloses a ventilation channel. The housing is provided with tool engagement surfaces to which a rotary tool can be attached. These tool engagement surfaces are located on an outflow-side end edge and / or on the circumference of an outflow-side housing section and / or on an annular shoulder running around the outside of the housing section. The tool engagement surfaces are thus necessarily located in prominent positions, which, while suitable for ensuring easy handling and proper functioning of the aerator, may impair its aesthetic appearance.

[0007] A vented aerator is already known from US Patent 3,424,387 A. This aerator has a sleeve-shaped outer casing with an internal thread on its inlet-side inner circumference, allowing it to be screwed onto an external thread on the water outlet of a sanitary fitting. An inner casing can be inserted into the outer casing of the known aerator. This inner casing has an annular flange projecting from its inlet-side end face, which can be engaged in an annular groove on the inner circumference of the outer casing. A mesh screen is inserted into the inner casing, forming the outflow-side end face of the known aerator. An annular gap is provided between the outer casing and the inner casing, which is engaged in this gap. This gap forms a ventilation channel leading from the outflow side of the casing to ventilation openings provided on the circumference of the inner casing.Since the inner housing is locked inside the outer housing by means of the ring flange, and since the inner housing is thus held freely rotatable on the outer housing, the outer housing must be grasped and rotated by its outer circumference projecting beyond the water outlet when the screw connection between the known aerator and the outlet fitting is to be loosened or made.

[0008] A vented aerator is already known from US Patent 3,827,636 A. This aerator has a sleeve-shaped housing with an external thread on its outer circumference, which can be screwed into an internal thread in the water outlet of a sanitary fitting. Various sieve plates and a perforated plate designed as a jet breaker can each be inserted into the outer housing up to a corresponding annular shoulder, with these annular shoulders arranged on the inner circumference of the aerator housing. The housing contains several ventilation channels, open towards the outlet side, which are evenly spaced around the circumference.In order to loosen or tighten the screw connection between the outer housing and the water outlet of the sanitary outlet fitting, grip grooves are provided on the part of the aerator housing that projects beyond the water outlet, spaced evenly apart in the circumferential direction, which are intended to facilitate manual gripping and clamping of the aerator housing.

[0009] Out of Figure 5A flow regulator intended for concealed installation within the water outlet of a tap is already known in WO 2006 / 122579 A1. Since the flow regulator housing of this known flow regulator disappears almost completely into the water outlet, and since the flow regulator housing can therefore no longer be accessed at its outer circumference, the downstream end of the sleeve of the sleeve-shaped flow regulator housing has a crown-shaped profile formed by alternating projections and indentations, to which a turning tool can be attached in a rotationally fixed manner. This crown-shaped profile on the downstream end of the sleeve of the flow regulator housing results in an increased installation length for the flow regulator housing of the known flow regulator.

[0010] US Patent 2007 / 196177 A1 discloses an aerator with a cartridge-shaped insertion housing. The insertion housing of the known aerator can be inserted into a sleeve-shaped outlet nozzle until an annular flange on the outer circumference of the insertion housing rests against an annular shoulder on the inside of the outlet nozzle, thus limiting the insertion movement. Since the insertion housing of the known aerator, which rests on the annular shoulder in the outlet nozzle with its annular flange, is freely rotatable relative to the outlet nozzle, the outlet nozzle must be clamped at its outer circumference when the screw connection between the outlet nozzle and the water outlet of the sanitary fitting is to be tightened or loosened. Further sanitary installation components in accordance with the state of the art are known from DE202008010725U1, DE102008050247A1 and WO2006 / 092316A2.

[0011] The particular task is therefore to create a sanitary fitting of the type mentioned at the beginning, which is characterized by simple handling and which nevertheless represents at least an equivalent alternative to the fittings that can be mounted with a spout nozzle in terms of function and aesthetic appearance of the spout fitting.

[0012] The solution to this problem according to the invention, in the sanitary installation component of the type mentioned at the outset, consists in particular in the fact that the inner and outer housing walls are connected to one another by means of webs, and that at least two webs are provided as rotary or tool engagement surfaces for a rotary tool that can be inserted into the space between the webs. The installation component according to the invention has a one- or multi-part installation housing which has an external thread on its outer circumference, which is intended for screwing into an internal thread provided on the inner circumference of the water outlet of a sanitary outlet fitting. With the aid of the external thread provided on the installation housing, the installation component according to the invention can optionally be screwed so deeply into the internal thread on the water outlet until the installation component does not protrude beyond the water outlet or protrudes only minimally.The mounting housing features an outflow-side end face with flow holes through which the water flowing through the mounting component can escape. At least one insert can be inserted into the mounting housing up to an insertion stop; this insert is designed to shape and / or regulate the flowing water.

[0013] According to the aforementioned invention, the built-in component is designed to have or be configured as a ventilated aerator. The circumferential wall of the housing encloses at least one ventilation channel in at least a double-walled section. This ventilation channel is open towards the downstream end face of the housing and opens into at least one ventilation opening leading into the interior of the housing. Ambient air can thus be drawn in through the ventilation channel, which is open towards the downstream end face, and introduced into the interior of the housing via the at least one ventilation opening. There, this ambient air is mixed with the water, which may be temporarily divided into individual jets, to produce a gently bubbling water flow.Since at least one ventilation channel is integrated into the circumferential wall of the installation housing, the installation component according to the invention, with its external thread, can also be mounted in internal threads that are also intended for receiving a spout. Thus, either a conventional aerator, which requires a spout for mounting, can be used, or the installation component according to the invention, which no longer requires a spout, can be used instead. In order to be able to loosen or tighten the screw connection provided between the sanitary installation component on the one hand and the water outlet of the sanitary fitting on the other hand, the invention provides that the inner and outer housing walls are connected to each other via webs and that at least two webs are provided as turning or tool engagement surfaces for a turning tool that can be inserted into the space between the webs.Since the component according to the invention no longer requires a spout, and since such a spout has previously mostly been made of brass and the manufacturing process required a final chrome plating of the brass part, the costs associated with procuring such a material are avoided, the material supply is ensured independently of this metal, and an environmentally harmful chrome plating process can be dispensed with.

[0014] According to a further proposal of the invention, it is additionally provided that the downstream housing end face is convex or domed in the downstream direction and has at least one slot, the opposite longitudinal sides of which are designed as rotary or tool engagement surfaces for a rotary tool that can be detachably inserted into the at least one slot.

[0015] In this embodiment according to the invention, the component according to the invention has at least one slot on its downstream housing end face, the opposite longitudinal sides of which are designed as rotary engagement surfaces or tool engagement surfaces for a rotary tool that can be detachably inserted into the at least one slot. The downstream housing end face is convexly or domed in the downstream direction such that the slot can be sufficiently deep to provide the rotary tool with a sufficient rotary or tool engagement surface on the correspondingly deep longitudinal sides of the slot, without thereby losing an excessive amount of space inside the housing.

[0016] In order to shape the water jet exiting the component effectively, without the downstream end of the housing offering high flow resistance, it is advantageous if the downstream end of the housing is designed as a grid, mesh or perforated structure.

[0017] The at least one slot can be designed as a slot-shaped opening in the housing end face. In contrast, a preferred embodiment according to the invention provides that the at least one slot has a slot or groove base that is closed or – for example, by means of a hole or grid structure forming the slot or groove base – open or permeable to liquids.

[0018] In order to design the slot longitudinal sides, which serve as turning or tool engagement surfaces, to be sufficiently stable, and in 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 area of ​​the at least one slot.

[0019] It is particularly advantageous if the slot has slot longitudinal sides with a wall thickness that is greater compared to flow-guiding walls, which flow-guiding walls form the grid, mesh or hole structure of the downstream housing end face.

[0020] According to the invention, the downstream housing section of the installation housing has a reduced housing cross-section compared to an adjacent upstream housing section, and the downstream housing section projecting beyond the water outlet has a free housing end edge that serves as a drip edge.

[0021] A sanitary fitting designed according to the invention has a downstream housing section with a reduced cross-section compared to the adjacent upstream housing section. The free end edge of the downstream housing section projecting beyond the water outlet is designed as a drip edge, allowing residual water that continues to escape even after the shut-off valve is closed to drip off without overflowing and running down the outside of the outlet fitting.

[0022] In order to ensure that the water flowing through the component according to the invention is evenly mixed with ambient air across its entire cross-section, it is advantageous to provide several ventilation openings, preferably evenly distributed around the circumference of the housing.

[0023] In order to accommodate at least one ventilation channel in the circumferential wall of the installation housing with minimal effort, it is advantageous if the installation housing has, at least in a downstream housing section, an outer housing wall supporting at least a partial section of the external thread and an inner housing wall spaced apart by the at least one ventilation channel.

[0024] The inner housing wall can also be designed as a drip edge if the inner housing wall protrudes beyond the outer housing wall and forms the outflow-side housing end edge.

[0025] In order to be able to securely screw the inventive component onto the internal thread provided on the inner circumference of the water outlet of a tap fitting using a suitable turning tool, it is advantageous if the inner and outer housing walls are connected to each other via preferably radial webs and if at least two webs are provided as turning or tool engagement surfaces for a turning tool that can be inserted into the space between the webs.

[0026] If the inventive component is designed as a jet aerator, ambient air can be drawn into the interior of the housing by means of a negative pressure. A preferred embodiment according to the invention provides that the jet regulator has an insert designed as a jet splitter, which divides the water flow into a plurality of individual jets, and that the at least one ventilation opening is arranged in a section of the housing interior downstream of the jet splitter in the direction of flow. Since the incoming water flow is divided into a plurality of individual jets in the jet splitter, and since these individual jets experience an increase in velocity in the region of the cross-sectional constriction caused by the jet splitter, a negative pressure is generated on the downstream side of the jet splitter according to Bernoulli's equation, which causes ambient air to be drawn into the interior of the housing.

[0027] In order to create the highest possible negative pressure on the outflow side of the jet separator and to ensure that the water flowing through the inventive component can be mixed well and effectively with the ambient air, it is advantageous if the jet separator has a large number of flow openings for dividing the water flow into a large number of individual jets.

[0028] It is possible for the jet splitter to be designed as a perforated plate or as a diffuser. However, a preferred embodiment according to the invention provides that the jet splitter designed as a diffuser has an annular wall supporting the flow openings, to which a central impact surface is formed on the downstream side, deflecting the incoming water flow towards the circumferential flow openings.

[0029] It is advantageous to provide a diffuser ring that surrounds the diffuser, at least in the area of ​​the flow openings, and to provide a flow channel that tapers in the direction of flow between the inner circumference of the diffuser ring and the outer circumference of the diffuser. The water, which is divided into individual jets in the area of ​​the diffuser, is accelerated in the flow channel provided between the diffuser and the diffuser ring to such an extent that a comparatively high negative pressure can be generated in this flow channel even with small quantities of water.

[0030] In order to avoid impairing the homogeneous spray pattern of the emerging water jet, it is advantageous if the diffuser ring shields the at least one ventilation opening at such a distance that the adjacent part of the diffuser ring serves as a splash guard for the at least one ventilation opening against the water flowing past the inner circumference of the diffuser ring.

[0031] In order to allow ambient air to flow into the area immediately adjacent to the jet breaker, without water being able to penetrate the ventilation duct through the ventilation openings and from there escape into an area outside the jet zone, it is advantageous if the diffuser ring has at least one air flow opening and if the at least one air flow opening preferably narrows in the direction of flow to form an air flow slot.

[0032] In order to be able to position and mount the insert housing and the diffuser ring, as well as the diffuser ring and the diffuser, with precise alignment, it is advantageous if the diffuser ring can be inserted into the insert housing and / or the diffuser into the diffuser ring up to an insertion stop.

[0033] To prevent the individual parts of the inventive component from unintentionally separating from one another during transport or storage, it is advantageous if the diffuser ring in the insertion housing and / or the diffuser in the diffuser ring can be detachably fixed and preferably detachably locked in place. A preferred embodiment according to the invention provides that a ring shoulder or ring flange is provided on the diffuser ring and / or the diffuser, which interacts with the insertion stop.

[0034] In order to regulate the flowing water to a maximum water volume per unit of time, independent of pressure, it is advantageous if the component has a flow regulator that is positioned upstream of the aerated jet regulator in the direction of flow.

[0035] To prevent dirt particles carried in the water from causing functional impairments in the successive functional units of the inventive component, it is advantageous to have a pre-filter screen positioned upstream of the preferably ventilated aerator and, if applicable, the flow rate regulator, in the direction of flow.

[0036] To avoid leakage currents around the outer circumference of the installation housing, it is advantageous to provide a ring seal made of preferably soft elastic material for axial sealing between the installation part and a ring shoulder located in the water outlet.

[0037] Further features of the invention will become apparent from the following description of exemplary embodiments of the invention in conjunction with the claims and the drawing. The individual features can be implemented individually or in combination in one embodiment according to the invention.

[0038] It shows: Fig. 1 in a longitudinal section (in section plane II according to Fig. 3 ) Sanitary fitting shown with a mounting housing which has an external thread on its outer circumference, which can be screwed into an internal thread in the water outlet of a sanitary outlet fitting, wherein a diffuser serving as a jet breaker can be inserted into the mounting housing, which is surrounded by a comparatively short diffuser ring, Fig. 2 the mounting part made of Figure 1 in a top view of its outlet end face, Fig. 3 the built-in part made of Figures 1 and 2 in a top view of its inlet-side end face, in which the perforated field of a pre-filter that can be detachably locked onto the inlet-side end face is clearly visible, Fig. 4 the built-in part made of Figures 1 to 3 in a perspective top view of its outlet end face, Fig. 5 the built-in part made of Figures 1 to 4 in a splayed perspective view of individual parts, Fig. 6 the built-in part made of Figures 1 to 5in a perspective partial longitudinal section, Fig. 7ein with Figures 1 to 6 comparable sanitary fitting also featuring a ventilated aerator with a diffuser ring that extends here to approximately the downstream end face of the diffuser, Fig. 8 the fitting made of Figure 7 in a top view of its outlet end face, Fig. 9 the built-in part made of Figures 7 and 8 in a top view of the inflow-side end face, Fig. 10 the built-in part made of Figures 7 to 9 in a perspective top view of the outlet end face, Fig. 11 the built-in part from the Figures 7 to 10 in a perspective view of individual parts, Fig. 12 the built-in part from the Figures 7 to 11 in a perspective partial longitudinal section, Fig. 13 a vented aerator of conventional design, which can be mounted on the water outlet of a sanitary outlet fitting by means of a separate outlet nozzle, Fig. 14 a with the Figures 1 to 12 comparable built-in component that fits into the water outlet of the in Figure 13 the shown outlet fitting is screwed in, with the external thread provided on the mounting housing of the installation part being screwed into the internal thread which is in Figure 13 designed to be screwed onto the outlet nozzle, Fig. 15 Figures 1 to 12 and 14 A comparable built-in component in a longitudinal section, on whose mounting housing a downstream housing end face is integrally formed, which has a radially oriented slot, the longitudinal sides of which of the slot serve as a rotational engagement surface, for example for a coin inserted into the slot and used as a turning tool, Fig. 16 the built-in component made of Figure 15 in a top view of its outlet end face, Fig. 17 the built-in part made of Figures 15 and 16 in a top view of its upstream end face, Fig. 18 the built-in part made of the Figures 15 to 17 in a perspective side view, Fig. 19 the built-in part from the Figures 15 to 18in a perspective view of individual parts, Fig. 20 the built-in part from the Figures 15 to 19 in a perspective partial longitudinal section, Fig. 21 with Figures 15 to 20 comparable installation part which has two slots intersecting at right angles on the downstream end face of its installation housing, forming a cross slot, Fig. 22 the installation part made of Figure 21 in a top view of its outlet end face, Fig. 23 the built-in part made of Figures 21 and 22 in a top view of its upstream end face, Fig. 24 the built-in part from the Figures 21 to 23 in a perspective top view of its outlet end face, Fig. 25 the built-in part from the Figures 21 to 24 in a perspective view of individual parts, Fig. 26 the built-in part from the Figures 21 to 25 in a perspective partial longitudinal section, and Fig. 27 a jet regulator designed and with the built-in part in Figures 15 to 20comparable built-in component in a longitudinal section, wherein the aerator here has a jet splitter designed as a perforated plate which has a multitude of axial flow holes to divide the incoming water into a corresponding number of individual jets.

[0039] In the Figures 1 to 12 and 14 to 27 A sanitary fitting is shown in various versions 1, 2, 4, 5, 6 and 7. The fittings 1, 2, 4, 5, 6 and 7 shown here can be mounted on the water outlet 70 of a sanitary outlet fitting 8, which is not shown in any further detail. The fittings 1, 2, 4, 5, 6 and 7 have a mounting housing 9 which has an external thread 10 on its outer circumference. The external thread 10 is designed to be screwed into an internal thread 11, which is provided on the inner circumference of the water outlet 70 of the sanitary outlet fitting 8 (see figure). Fig. 14). The installation housing 9 has a downstream housing end face 12 with flow holes 13.

[0040] The circumferential wall of the mounting housing 9 of the mounting components 1, 2, 4, 5, 6 and 7 shown here encloses an annular ventilation channel 14 in a double-walled section. This ventilation channel 14, which is open towards the downstream end face 12 of the housing (lower in the figures), opens into several ventilation openings 15, which are preferably evenly distributed around the circumference of the housing and lead into the interior of the mounting housing 9. The ventilation channel 14 and the ventilation openings 15 are part of an aerator 16, a so-called jet aerator, integrated into the mounting components 1, 2, 4, 5 and 6. The mounting component 7, on the other hand, is itself designed as an aerator.

[0041] The mounting housing 9 of the mounting components 1, 2, 4, 5, 6 and 7 has, in its downstream housing section, an outer housing wall 17 and an inner housing wall 18 separated by the ventilation channel 14. The inner housing wall 18 projects beyond the outer housing wall 17 and forms the downstream housing end face. The outer housing wall 17 carries at least a portion of the external thread 10. The inner and outer housing walls 17, 18 are connected to each other by radial webs 19, the webs 19 serving as a turning or tool engagement surface for a turning tool that can be inserted into the space between the webs 19.

[0042] Since such a special turning tool is not always available, especially in a private household, the outflow-side housing end face 12 of the in the Figures 15 to 27The illustrated components 5, 6, and 7 each have at least one slot 20, 21, the opposite longitudinal sides of which are designed as rotary or tool engagement surfaces for a rotary tool that can be detachably inserted into the at least one slot 20 or 21. A screwdriver, but preferably also a coin, can serve as the rotary tool. In order to enable the transmission of a higher torque with the aid of the rotary tool that can be inserted into the slot 20, 21, the downstream end face 12 of the housing is convex or crowned in the downstream direction, so that the longitudinal sides of the slots are preferably designed to be deep, without the housing end face 12 significantly restricting the space available inside the housing. There is thus sufficient space inside the housing to provide further insertion or flow-shaping elements 47, 48 (see Figure 1). Fig. 27 ). While the aerator 5 according to the Figures 15 to 20only one approximately radially oriented slot 20 on its housing end face, there are on the housing end face 12 of the in the Figures 21 to 26 The installation part 6 shown has two radially oriented slots 20, 21 arranged at right angles to each other, which here form a cross slot.

[0043] In the mounting housing 9 of the mounting parts 1, 2, 4, 5, 6 and 7, at least one insert part can be inserted up to an insertion stop. Thus, the Figures 1 to 12 and 14 to 26It is evident that an insert designed as a jet splitter can be inserted into the mounting housing 9 of the mounting parts 1, 2, 4, 5, 6 and 7. This insert is designed to divide the water flow into a multitude of individual jets and has a multitude of flow openings 22 for this purpose. The insert serving as a jet splitter is designed here as a diffuser 23, which has an annular wall 24 supporting the flow openings 22. A central baffle surface 25 is formed on the annular wall 24 of the pot-shaped diffuser 23, which deflects the incoming water flow towards the circumferential flow openings 22.

[0044] The diffuser 23 is enclosed by a diffuser ring 26 such that a flow channel 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. 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 past the inner circumference of the diffuser ring 26.

[0045] The diffuser ring 26 of the installation parts 2, 5 and 6 has airflow openings 29 that narrow in the direction of airflow to form an airflow slot. Ambient air can thus be drawn in through the ventilation duct 14, through the ventilation openings 15 in the circumferential wall and the airflow openings 29 in the diffuser ring 26, into the interior of the installation housing 9, where it mixes with the individual jets generated by the diffuser 23 before being combined and shaped at the housing end face 12, which acts as a flow straightener, to form a homogeneous, non-splashing, and softly aerated overall jet.

[0046] The aerator 16 integrated into the installation parts 1, 2, 4, 5 and 6 thus consists essentially of the diffuser 23, the associated diffuser ring 26, and the housing end face 12 of the installation housing 9, which is designed as a flow straightener.

[0047] While the jet splitter is designed as a diffuser 23 in the installation parts 1, 2, 4, 5 and 6, the installation part 7, designed as a jet regulator, has in Figure 27 instead, a jet splitter is provided, designed as a perforated plate 40, which has a corresponding number of axial flow holes 41 for dividing the incoming water into a multitude of individual jets.

[0048] To draw ambient air into the housing interior and to create a negative pressure within the housing interior, an annular flow channel 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. The individual jets separated in the diffuser 23 are accelerated in this tapered flow channel 30 in such a way that a negative pressure is created on the downstream side of the diffuser 23 in the region of the downstream opening of the flow channel 30.

[0049] Even in the Figure 27 In the illustrated installation part 7, the cross-sectional area in the flow holes 41 of the perforated plate 40 is narrowed in such a way that the individual jets generated by the perforated plate 40 are accelerated in such a way that a negative pressure is also created on the outflow side of the perforated plate 40.

[0050] While the diffuser ring 26 can be inserted into the mounting housing 9 up to an insertion stop 31, the diffuser 23 can in turn be inserted into the diffuser ring 26 up to an insertion stop 32. A sealing ring 33, preferably made of a soft elastic material, is provided, which seals the gaps between the mounting housing 9 and the diffuser ring 26 and between the diffuser ring 26 and the diffuser 23, and which can be clamped for axial sealing between the inlet-side end face of the mounting housing 9 and an annular shoulder in the water outlet 7 of the sanitary outlet fitting 8.

[0051] In the Figs. 1 to 12 and 14 to 26It can be seen that a flow regulator 34 is connected upstream of the aerator of the components 1, 2, 4, 5, and 6. This flow regulator has an annular throttle body 35 made of elastic material, which limits a control gap 37 between itself and a control profile 36, the gap of which changes under the pressure of the flowing water. This flow regulator 34 is connected via a snap-fit ​​connection to the aerator 16 downstream in the direction of flow and, in particular, to its diffuser 23. A pre-filter screen 38, which tapers conically against the direction of flow, is connected upstream of the flow regulator 34. This pre-filter screen is designed to filter out dirt particles carried in the water before they can impair the function of the flow regulator 34 or the downstream aerator. A comparable pre-filter screen 38 is also provided upstream of the component 7.

[0052] From a comparison of Figs. 13 and 14It becomes clear that the installation parts 1, 2, 4, 5, 6 and 7 shown here, with their external thread 10 provided on the installation housing 9, can also be screwed into the internal thread 11 on the water outlet 7 of a sanitary outlet fitting, which is otherwise required for mounting the outlet nozzle 28 needed for a standard aerator 3. In this way, it is possible to use the components in the Figs. 13 and 14 The outlet fitting shown can be used either in conjunction with an outlet nozzle 28 and a commercially available aerator 3 inserted therein, or in conjunction with one of the installation parts 1, 2, 4, 5, 6 and 7 according to the invention.

[0053] In Figure 14It is evident that the housing end face 12 can also be designed as a separate component, which is inserted into the mounting housing 9 of the mounting component 4. The outer circumference 43 of the disc-shaped housing end face 12 is spherically cap-shaped and pivotably held in a complementarily shaped socket 44, which is formed by a portion of the inner circumferential wall of the housing 9. In order to secure such a housing end face 12, manufactured as a separate component and optionally pivotably mounted in the housing 12, within the housing 9, it is advantageous for pin-shaped projections 45 to protrude from the downstream end edge of the diffuser ring 26. These projections serve as retainers or pivot stops for the housing end face 12, which is designed as a separate component.

Claims

1. Sanitary fitting (1, 2, 4, 5, 6, 7) having an installation housing (9) that has a thread (10) for fastening to a counter thread (11) provided on the water outlet (70) of a sanitary outlet fitting (8), wherein the installation housing (9) has a downstream housing end face (12) with flow-through holes (13) and wherein at least one insert part can be inserted into the installation housing (9) up to an insertion stop, wherein the fitting (1, 2, 4, 5, 6, 7) has a ventilated jet regulator or is designed as such, wherein the peripheral wall of the installation housing (9) surrounds at least one ventilation channel (14) at least in a section that is designed with at least a double wall, and wherein the at least one ventilation channel (14) that is open toward the downstream housing end face (12) opens into at least one ventilation opening (15) that leads into the interior of the installation housing (9), wherein the thread provided on the installation housing is designed as an external thread arranged on the outer circumference of the housing, which cooperates with an internal thread located on the inner circumference of the water outlet and designed as a counter thread, and wherein the installation housing (9) has, at least in a downstream housing section, an outer housing wall (17) carrying at least a partial section of the external thread (10) and an inner housing wall (18) spaced apart by the at least one ventilation channel (14), characterized in that the inner and outer housing walls (17, 18) are connected to one another by webs (19) and in that at least two webs (19) are provided as rotation or tool engagement surfaces for a rotation tool which can be inserted into the free space between the webs (19), and in that the downstream housing section of the installation housing (9) has a reduced housing cross-section relative to an adjacent upstream housing section, and in that the downstream housing section projecting beyond the water outlet (70) has a free housing end edge which serves as a drip edge.

2. Fitting according to claim 1, characterized in that the downstream housing end face (12) is designed to be convex or domed in the downstream direction and has at least one slot (20, 21) whose opposite longitudinal slot sides serve as rotation or tool engagement surfaces for a rotary tool insertable into the at least one slot (20, 21).

3. Fitting according to claim 1 or 2, characterized in that the downstream housing end face (12) is designed as a grid, mesh or perforated structure.

4. Fitting according to claim 2 or 3, characterized in that at least one slot (20, 21) has a slot or groove base which is closed or, preferably by means of a hole or grid structure forming the slot or groove base, is designed to be open or liquid-permeable.

5. Fitting according to one of claims 1 to 4, characterized in that the housing end face (12) has a cross-sectional thickening at least in the region of the at least one slot (20, 21) and / or in that the slot (20, 21) has slot longitudinal sides with a wall thickness that is greater than that of flow guide walls (46) which form the grid, mesh or perforated structure of the downstream housing end face (12).

6. Fitting according to one of claims 1 to 5, characterized in that a plurality of ventilation openings (15) are provided, preferably distributed evenly around the housing circumference.

7. Fitting according to one of claims 1 to 6, characterized in that the inner housing wall (18) projects beyond the outer housing wall (17) and forms the downstream housing end edge.

8. Fitting according to one of claims 1 to 7, characterized in that the webs (19) connecting the inner and outer housing walls (17, 18) are radially formed.

9. Fitting according to one of claims 1 to 8, characterized in that the jet regulator (16) has an insert part designed as a jet splitter, which divides the water flow into a plurality of individual jets, and in that the at least one ventilation opening (15) opens into a section of the housing interior downstream of the jet splitter in the direction of flow.

10. Fitting according to claim 9, characterized in that the jet splitter has a plurality of flow openings (22, 41) for dividing the water flow into a plurality of individual jets.

11. Fitting according to claim 9 or 10, characterized in that the jet splitter is designed as a perforated plate (40) or as a diffuser (23).

12. Fitting according to claim 11, characterized in that the jet splitter designed as a diffuser (23) has a ring wall (24) carrying the flow openings (22), to which a central baffle plate (25) is integrally formed, which deflects the inflowing water flow in the direction of the peripheral flow openings (22).

13. Fitting according to claim 11 or 12, characterized in that a diffuser ring (26) is provided which surrounds the diffuser (23) at least in the region of the flow openings (22) and in that a flow channel (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).

14. Fitting according to claim 13, characterized in that the diffuser ring (26) covers the at least one ventilation opening (15) at a distance such that the adjacent section of the diffuser ring (26) serves as a splash guard (27) for the at least one ventilation opening (15) against the water flowing past the inner circumference of the diffuser ring (26).

15. Fitting according to claim 13 or 14, characterized in that the diffuser ring (26) has at least one air flow opening (29) and in that the at least one air flow opening (29) narrows in the direction of flow, preferably to form an air flow slot.

16. Fitting according to one of claims 13 to 15, characterized in that the diffuser ring (26) and / or the diffuser (23) can be inserted into the installation housing (9) up to an insertion stop (31, 32).

17. Fitting according to one of claims 13 to 16, characterized in that the diffuser ring (26) in the installation housing (9) or the diffuser (23) in the diffuser ring (26) can be detached and fixed and preferably detachably locked.

18. Fitting according to one of claims 13 to 17, characterized in that a ring shoulder or ring flange is provided on the diffuser ring (26) and / or on the diffuser (23), which cooperates with the insertion stop (31; 32).

19. Fitting according to one of claims 1 to 18, characterized in that the fitting (1, 2, 4, 5, 6) has a flow rate regulator (34) and / or a throttle disc which is connected upstream of the aerated jet regulator in the direction of flow.

20. Fitting according to claim 19, characterized in that a strainer attachment (38) is connected upstream of the aerated jet regulator and the flow rate regulator (34) in the direction of flow.

21. Fitting according to one of claims 1 to 20, characterized in that a ring seal (33) made of preferably soft elastic material is provided for axial sealing between the component and a ring shoulder located in the water outlet (7).

22. Fitting according to one of claims 1 to 21, characterized in that the housing end face (12) is rotatably guided in the downstream end plane of the fitting (4) and / or is mounted so as to be pivotable about a pivot axis oriented transversely to the longitudinal axis of the housing.

23. Fitting according to claim 22, characterized in that the downstream housing end face (12) has a spherical cap-shaped peripheral edge region (43) which is rotatably and / or pivotably mounted in a housing part region of the installation housing (9) designed as a joint socket (44).

24. Fitting according to claim 22 or 23, characterized in that the housing end face (12) can be inserted into the installation housing (9) as a separate insert.

25. Fitting according to one of claims 1 to 24, characterized in that pin-shaped projections (45) are formed on the downstream end face of the diffuser ring (26), which serve as hold-down elements and / or swivel stops for a housing end face (12) insertable into the installation housing (9).

Images