CN109457766B

CN109457766B - Sanitary insert, water outlet system and use of a discharge opening into a jet aerator

Info

Publication number: CN109457766B
Application number: CN201810115729.1A
Authority: CN
Inventors: A·施泰因; G·布卢姆
Original assignee: Neoperl GmbH
Current assignee: Neoperl GmbH
Priority date: 2017-09-06
Filing date: 2018-02-06
Publication date: 2021-04-27
Anticipated expiration: 2038-02-06
Also published as: PL3679198T3; EP3679198B1; WO2019048120A1; EP3679198A1; US20210140157A1; DE202017105386U1; CN109457766A; CN208056195U; ES2903437T3

Abstract

The invention relates to a sanitary insert (1) comprising an inflow side (2) and an outflow side (3), between which a fastening structure (4) is formed for detachable fastening to a mating fastening structure (6) on a water outlet (5) of a sanitary fitting, between which fastening structure and inflow side a sealing element (7) is formed for at least partial sealing, comprising a jet aeration device (8) having an aeration inlet (9) which is open towards the outflow side, and further comprising a discharge opening (10) formed between the sealing element and the fastening structure which communicates the outside of the sanitary insert with an aeration chamber of the jet aeration device. The invention also relates to a water outlet system comprising the sanitary insert and to the use of a discharge opening.

Description

Sanitary insert, water outlet system and use of a discharge opening into a jet aerator

Technical Field

The invention relates to a sanitary insert comprising an inflow side and an outflow side, wherein a fastening structure is formed between the inflow side and the outflow side, which fastening structure is designed for detachable fastening to a mating fastening structure on a water outlet of a sanitary fitting, wherein a sealing element for at least partial sealing is formed between the fastening structure and the inflow side, and wherein the sanitary insert further comprises a jet aeration device having an aeration inlet which is open to the outflow side.

The invention furthermore relates to a water outlet system comprising an insert as described above, which is inserted into a water outlet of a sanitary fitting, wherein a sealing element of the insert at least partially seals a gap between the insert and the water outlet.

The invention finally relates to the use of a discharge opening into a jet aerator for reducing permeate water discharged between an insert and a water outlet opening accommodating the insert.

Background

The same type of sanitary insert and the same type of outlet system and the same type of corresponding use are known, for example, from EP3153633a 1.

Disclosure of Invention

The object of the invention is to provide an alternative means for sealing the gap between the sanitary insert and the outlet opening of the sanitary fitting, which outlet opening accommodates the sanitary insert, in a simple manner.

In order to achieve this object, the invention provides a sanitary insert comprising an inflow side and an outflow side, wherein a fastening structure is formed between the inflow side and the outflow side, which fastening structure is designed for detachable fastening to a mating fastening structure on a water outlet of a sanitary fitting, wherein a sealing element for at least partial sealing is formed between the fastening structure and the inflow side, wherein the sanitary insert further comprises a jet-aeration device having an aeration inlet opening toward the outflow side, wherein at least one discharge opening leading from the outside to the jet-aeration device is formed between the sealing element and the fastening structure, and wherein the discharge opening opens into the jet-aeration device. In order to achieve the stated object, in particular, according to the invention, a sanitary insert of the type mentioned at the outset is provided in which at least one outlet opening from the outside to the jet aeration device is formed between the sealing element and the fastening structure, said outlet opening into the jet aeration device. Therefore, the technical effects of the invention are as follows: the water penetrating at the sealing element can be simply contained and returned to the main flow path substantially imperceptible to the user. Drainage past the fixed structure near the outflow side can thus be significantly reduced or even completely avoided. In this case, it is not necessary to configure the sealing element or to press it in the water outlet such that a positive seal is obtained. Instead, a certain leakage may be allowed, which leakage may be received by the discharge opening. This makes the installation of the insert considerably simpler, since the insert does not have to be installed with great effort.

In this case, the sealing element can achieve a complete seal. However, it is sufficient for the purposes of the present invention for the sealing element to achieve only a partial sealing, from which a pressure difference over the sealing element is generated. The pressure difference can be set, for example, such that a large part of the water penetrating at the sealing element or even all of the penetrating water passes into the outlet opening.

The fastening structure can be arranged here in such a way that it is detachably connected to the mating fastening structure. The fastening structure can be provided, for example, as a screw connection, a plug connection, a snap connection and/or a snap connection or as a combination of one or more of these connections with one another or with other connections.

In one embodiment of the invention, it can be provided that a main flow path is formed between the inflow side and the outflow side. The leakage flow can thus be returned to the main flow via the outlet opening when the insert is inserted. It is thus possible to avoid that permeate water is drained laterally from the fitting.

In this case, it can be provided that the jet aeration device forms a flow obstacle in the main flow path. The flow obstacle can thus cause a pressure drop relative to the inflow side, which enables a return of the permeate flow or the leakage flow into the main flow path.

In one embodiment of the invention, it can be provided that the outlet opening opens into the main flow path downstream of the flow obstacle in the flow direction. It is thus possible to avoid: the permeate stream must develop a large pressure in order to flow into the main flow path. This can be used, for example, to relieve the seals placed on the outflow side of the discharge opening from loads, which seals can be formed, for example, by fixing structures.

Particularly advantageous are: a plurality of preferably identical outlet openings are arranged distributed over the outer circumference, or the one outlet opening is designed to be annularly encircling. It is thus possible to achieve: the discharge opening is provided substantially over the entire periphery. Leakage can thus be accommodated on all sides.

Preferably, the sealing element is integrally formed on the base body and/or is designed to be annularly encircling.

In one embodiment of the invention, it can be provided that the fastening means is formed on the base body. A simple retention in the water outlet can thus be achieved. This is advantageous, for example, when: the securing structure is a portion of a threaded or bayonet connection.

Alternatively or additionally, it can be provided that the outlet opening is formed on the base body. The at least one outlet opening can thus be constructed, for example, simply by injection molding.

Particularly advantageous are: an annularly encircling collecting gutter is formed on the base body, from which collecting gutter the outlet opening extends. Thus, permeate water can be collected along the complete periphery and can be delivered to the at least one drain opening.

In one embodiment of the invention, it can be provided that the sealing element is integrally formed on the base body, as already mentioned, for example. This enables a simple construction of the sealing element, wherein an additional mounting step can be dispensed with.

In one embodiment of the invention, it can be provided that the sealing element is designed to be annularly encircling. This makes it possible to seal the annular gap between the insert and the water outlet on all sides with simple means.

In one embodiment of the invention, it can be provided that the sealing element seals radially. The radial seal has the following advantages: the pressing force can be generated on the basis of a radial material pressing and therefore only a relatively small force has to be applied when the insert is inserted into the water outlet.

In one embodiment of the invention, it can be provided that the sealing element seals axially. The radial structural dimensions can therefore be kept small.

Particularly advantageous are: the sealing element seals radially and axially. The sealing element can therefore be used in water outlets of various different configurations, in which the sealing is either radial or axial, or both.

In one embodiment of the invention, it can be provided that the jet aeration device is formed in a base body, as already mentioned. A compact insert can thus be constructed.

In one embodiment of the invention, it can be provided that the base body is formed in one piece. The effort required for production and/or installation can thus be reduced.

Alternatively, it can be provided that the base body is formed in multiple parts. Advantageously, different materials can be used here. It is also advantageous that a more complex shaping of the substrate can be achieved.

In one embodiment of the invention, it can be provided that the base body is made of plastic. The base body can therefore be produced at low cost, for example as an injection-molded part. Plastics have also proven to be advantageous as a material in order to avoid or reduce scaling.

In one embodiment of the invention, it can be provided that the sealing element is formed on an upper part of the base body and the fastening structure is formed on a lower part of the base body.

In this case, it can be provided that the upper part is connected to the lower part in a snap-fit manner. Thus, the base body can be simply mounted. Alternatively or additionally, it can be provided that the upper part has a greater deformability than the lower part. The fastening structure can thus be designed to have a higher strength than the sealing element. On the other hand, a higher deformability of the sealing element may be used to improve the sealing. The deformability may be plastic or elastic, for example.

In one embodiment of the invention, it can be provided that the at least one outlet opening is arranged at a distance from the fastening structure. It is advantageous here that the overflow of permeate water into the fixed structure can be avoided in that the distance is selected, for example, to be sufficiently large.

In one embodiment of the invention, it can be provided that a collecting space is formed between the fastening structure and the outflow side, with which collecting space water penetrating through the thread can be collected. The permeate water flowing through the fixed structure can thus be collected in order to avoid undesired drainage at the wrong location.

Preferably, the collecting space is designed as an annularly encircling groove. Thus, undesired drainage along the entire periphery of the insert may be reduced or even avoided.

In this case, it can be provided that the collecting space has an overflow opening which opens into the gassing inlet. The collecting space can thus simply be emptied into the main flow path.

In one embodiment of the invention, it can be provided that a sealing lip is formed on the outflow side, with which sealing lip the collecting space is sealed off to the outside in the water outlet. This provides an additional possibility of avoiding or at least reducing the undesired discharge of permeate water next to the actual water outlet.

In one embodiment of the invention, it can be provided that the fastening means is formed as a thread which is formed as a mating thread on the outlet opening of the sanitary fitting. The thread enables a particularly simple fixing in the water outlet. Furthermore, when the threads cooperate with mating threads, the threads constitute a flow obstruction. Thereby, it is possible to realize particularly importantly: the permeate water is drained via the drain openings and not via the threads.

In one embodiment of the invention, it can be provided that a tool holder, in particular a slot, is provided on the outflow side for assisting the fastening process and/or the detachment process. Thus, a sufficiently large force can be introduced to embed the insert.

A preferred application of the invention is in a sanitary fitting with a water outlet system according to the invention as described before and/or with a water outlet system according to the invention as described below.

The outlet system comprises a sanitary insert according to the invention, which is inserted into the outlet opening of the sanitary fitting, wherein the sealing element of the sanitary insert at least partially seals a gap between the sanitary insert and the outlet opening.

For this outlet system, the flow resistance between the outlet opening and the outflow side is smaller than the flow resistance in the permeate path formed between the fixing structure and the mating fixing structure.

In order to achieve the stated object, the invention provides a parallel characteristic for a water discharge system. In particular, according to the invention, it is therefore provided for a water outlet system of the type mentioned at the outset that the insert is formed according to the invention, in particular as described above. The annular gap between the insert and the outlet opening of the fitting can therefore be sealed in a simple manner without placing too high a requirement on the tightness of the sealing element.

In one embodiment of the invention, it can be provided that the flow resistance between the outlet opening and the outflow side is smaller than the flow resistance in the permeate path formed between the fastening structure and the mating fastening structure. Thus, the at least one drain opening may be configured as a preferred path for the permeation of water.

In order to achieve the object, the invention proposes the use of a discharge opening into a jet aerator for reducing the discharge of penetrating water between a sanitary insert according to the invention and a water outlet opening accommodating the sanitary insert. In particular in applications of the type mentioned at the beginning, therefore, provision is made according to the invention for: the discharge opening is arranged upstream of the fixed structure of the insert and downstream of the sealing element of the insert in the permeation path of the permeated water. It is advantageous here that a sufficient pressure reduction can be achieved only by the sealing element, so that undesired drainage next to the water outlet can be avoided by means of a coordination between at least the front outlet opening and the fastening structure.

Particularly advantageous here are: according to the invention, the sanitary insert is designed in particular as described above. Thus, the synergy of the advantages already described can be used.

In one embodiment of the invention, it can be provided that the sealing element causes a pressure reduction in the permeation path. Thus, a reduction of the load on the fastening structure can be achieved.

In this case, it can be provided that the flow resistance generated by the sealing element is greater than the flow resistance in a section of the main flow path in the sanitary insert which extends parallel to the sealing element. It is thus possible to avoid the function of the functional unit in the main flow path, for example the jet aeration device, being impaired. The volume flow of the permeate flow can be kept small relative to the main flow.

Particularly advantageous are: the flow resistance between the outlet opening and the outflow side is smaller than the flow resistance in the permeate path formed between the fastening structure and the mating fastening structure, as already described. It is thus simply achieved that the permeate water flows out virtually unhindered via the at least one outlet opening.

The invention further relates to a sanitary insert comprising an inflow side and an outflow side, wherein a fastening structure is formed between the inflow side and the outflow side, which fastening structure is designed for detachable fastening to a mating fastening structure on a water outlet of the sanitary fitting, wherein a sealing element for at least partial sealing is formed between the fastening structure and the inflow side, wherein the sanitary insert further comprises a jet aeration device having an aeration inlet opening towards the outflow side or at least outwardly, and wherein the sanitary insert further comprises a discharge opening formed between the sealing element and the fastening structure, which discharge opening connects an outer side of the sanitary insert to an aeration chamber of the jet aeration device.

Drawings

The invention will now be further described with reference to some examples, to which, however, the invention is not limited. The figures show that:

fig. 1 shows an embodiment of a sanitary insert according to the invention, partially broken away, in a perspective view, which insert is inserted into a water outlet of a sanitary fitting, wherein a sealing element radially seals a gap between the insert and the water outlet,

fig. 2 shows a detail view of the first wraparound region of the sanitary insert in fig. 1, in which detail view the discharge opening between the sealing element and the fastening arrangement is shown enlarged,

fig. 3 shows an enlarged detail view of the second encircled area in fig. 1, in which the collecting space is arranged,

fig. 4 shows a longitudinal section through another embodiment of a sanitary insert, which is inserted into a water outlet of a sanitary fitting, wherein a sealing element axially seals a gap between the insert and the water outlet,

fig. 5 is an enlarged detail view of the encircled area in fig. 4 showing the axial sealing of the gap between the insert and the water outlet.

Detailed Description

Fig. 1 to 5 show a sanitary insert which is provided with the reference number 1 in its entirety. The sanitary insert 1 is designed to be detachably fastened to the outlet opening 5 of the sanitary fitting, so that a simple replacement is possible.

The sanitary insert 1 has an inflow side 2 directed upwards and an outflow side 3 directed downwards in fig. 1 and 4, respectively.

A fastening structure 4 arranged between the inflow side 2 and the outflow side 3 is formed on the base body 12 of the sanitary insert 1, which fastening structure is designed in such a way that, in the installed position, a fastening of the sanitary insert 1 to the mating fastening structure 6 of the sanitary fitting can be established. The base body 12 has at least in sections a cylindrical shape. The fastening structure 4 is formed on the outer circumferential surface of the base body 12 and the mating fastening structure 6 of the sanitary fitting is formed on the inner circumferential surface of the outlet opening 5 of the sanitary fitting.

As shown in fig. 1 to 5, the fastening structure 4 can be formed as a thread, in particular as an external thread. Correspondingly, the mating fastening means 6 is likewise designed as a mating thread, in particular as an internal thread, which is adapted thereto.

The sanitary insert 1 furthermore has a sealing element 7, by means of which, as shown in fig. 1 to 3, a radial sealing of the gap 19 between the sanitary insert 1, in particular the outer side of the sanitary insert 1, and the water outlet 5 of the sanitary fitting is formed. The stop 21, which is acted upon by the sealing element 7 in the installed position, is oriented here at an angle to the insertion direction of the sanitary insert 1 and/or to the flow direction of the water. The sealing does not necessarily lead to a complete sealing of the gap 19, since water which, despite the sealing, has pushed through the gap 19 can be returned in the flow direction from the sealing element 7 into the main flow path on the outflow side.

Fig. 4 and 5 show another possible insertion of the sanitary insert 1 into a differently designed outlet opening 5, which in particular has a stop 21 that differs from the design in fig. 1 to 3. Here, an axial seal is formed by the sealing element 7, which at least partially prevents water from passing through the gap 19. The stop 21, which is acted upon by the sealing element 7 in the installed position, is here transverse, in particular perpendicular, to the insertion direction of the sanitary insert 1.

The sanitary insert 1 can therefore be inserted without structural changes into various differently configured water outlets, in particular with a stop surface for the sealing element 7, which is oriented transversely and/or perpendicularly to the insertion direction and/or the flow direction of the sanitary insert 1.

The sealing element 7 therefore has at least two stop surfaces 22, which are arranged in particular at a distance from one another and are designed in such a way that two different sealing configurations can be established with the stop 21 of the sanitary fitting.

In the embodiments shown, the sealing element 7 is annular and is formed as a part of a multi-part base body 12. However, it is also conceivable for the sealing element 7 to be integrally formed on the base body 12, which is formed, for example, in one piece, or on a component, in particular the upper component, of the base body 12.

The sanitary insert 1 has a jet aeration device 8 formed in the base body 12 for aerating the water jet, which has an aeration inlet 9 which is open toward the outflow side 3 and opens into an aeration chamber and through which air can be sucked in from the outside via the outflow side 3. The jet aeration device 8 has a flow obstacle 11, which can be embodied, for example, as a reflective surface with a nozzle opening. When the water strikes the reflective surface and then enters the aeration chamber of the jet aeration device 8 via the nozzle opening, a negative pressure is generated inside the aeration chamber, by means of which air is sucked into the aeration chamber via the aeration inlet 9. This can be achieved: the water jet subsequently discharged via the outflow side 3 is aerated.

In order to guide the water which passes through the gap 19, in particular because of an incomplete seal, back into the main flow path, the sanitary insert 1 has at least one outlet opening 10 between the sealing element 7 and the fastening structure 4, which opens into the jet aeration device 8. The outlet opening 10 formed in the main body 12 is open toward the outside of the sanitary insert 1, so that water that has pushed through the gap 19 can be conducted out via the outlet opening 10 in order to prevent an influence on the jet pattern due to an undesired leakage. In the flow direction, the discharge opening 10 is arranged downstream of the flow obstacle 11 and upstream of the fixed structure 4 at a distance therefrom. In this exemplary embodiment, a plurality of, for example, the same type of outlet openings 10 are formed, which together cover a large part of the outer circumference.

The outlet opening 10 is arranged here on a collecting gutter 26, which is formed by the base body 12 in the form of a circumferentially encircling gutter. The collecting gutter thus receives permeate water passing by the sealing element 7 and directs it to the discharge opening 10.

In the illustrated embodiments according to fig. 1 to 5, the sanitary insert 1 has a multi-part base body 12, which comprises three parts each. The base body 12 may, for example, as shown in the figure, comprise a sealing element 7, an upper part 13 and a lower part 14. The flow obstacle 11 may be formed by the upper part 13. The aeration chamber 25 can be formed by the lower part 14. The upper part 13 and/or the lower part 14 and/or the sealing element 8 can be locked via a mechanical connection, in particular a snap-fit connection. For this purpose, the component to be latched comprises latching elements 23 and/or mating latching elements 24 corresponding thereto. The sealing element 7 can furthermore be formed in one piece with the upper part 13. Suitable here may be: the upper part 13 has a greater, preferably elastic deformability than the lower part 14.

In fig. 1 and 3, a collecting space 15 is shown, which is designed to collect water that passes through the permeation path between the fixing structure 4 and the mating fixing structure 6 in order to prevent undesired leakage.

The collecting space 15 is arranged upstream of the filler inlet 9 in the inflow direction of the air drawn through the filler inlet 9. The collecting space 15 has a sealing lip 17 with which it can be sealed off outwardly, in particular downwardly, at the water outlet 5. The collecting space 15 furthermore has an overflow opening 16, through which water that can no longer be accommodated by the collecting space 15 can be discharged from the collecting space 15. This water can thus be sucked together with the sucked-in air into the aeration chamber of the jet aeration device 8 through the aeration inlet 9 during the water flow through the sanitary insert 1. Undesired leakage via the permeation path 20, which would have an adverse effect on the jet pattern as a whole, can thus be avoided. Furthermore, the flow resistance between the outlet opening 10 and the outflow side 3 is smaller than the flow resistance in the permeate path 20 formed between the fixing structure 4 and the mating fixing structure 6. Thus, the water will select the path of least resistance and be discharged through at least the fine discharge opening 10, instead of slowly moving along the percolation path 20 between the fixture 4 and the mating fixture 6. The sealing element 7 also causes a pressure drop in the permeation path 20, since the flow resistance generated by the sealing element 7 is greater than in the section of the main flow path in the sanitary insert 1 that extends parallel to the sealing element 7.

A tool seat 18 in the form of a slot is formed on the outflow side 3 of the sanitary insert 1. By means of the tool, the sanitary insert 1 inserted into the water outlet 5 can be detached, in particular screwed out, from the water outlet 5 or can also be inserted, in particular screwed into the water outlet by placing the tool on the tool mount 18 and performing an opening movement, preferably defined as a rotary movement.

List of reference numerals

1 sanitary insert

2 inflow side

3 outflow side

4 fixing structure

5 Water outlet of sanitary fitting

6 cooperation fixed knot constructs

7 sealing element

8 jet aerating device

9 air-entrapping inlet

10 discharge opening

11 flow obstruction

12 base body

13 upper part of the base body

14 lower part of the base body

15 collecting space

16 overflow opening

17 sealing lip

18 tool mounting portion

19 gap

20 permeation pathway

21 stop

22 stop surface

23 latching element

24 cooperating latch elements

25 air-entraining chamber

26 collecting tank

Claims

1. Sanitary insert comprising an inflow side (2) and an outflow side (3), wherein a fastening structure (4) is formed between the inflow side (2) and the outflow side (3), wherein the fastening structure (4) is formed for detachable fastening to a mating fastening structure (6) on a water outlet (5) of the sanitary fitting, wherein a sealing element (7) for at least partial sealing is formed between the fastening structure (4) and the inflow side (2), wherein the sanitary insert further comprises a jet aeration device (8) having an aeration inlet (9) which is open toward the outflow side (3), wherein at least one discharge opening (10) leading from the outside to the jet aeration device (8) is formed between the sealing element (7) and the fastening structure (4), wherein the discharge opening leads into the jet aeration device (8).

2. Sanitary insert according to claim 1, characterized in that a main flow path is formed between the inflow side (2) and the outflow side (3).

3. Sanitary insert according to claim 2, characterized in that the jet aeration device (8) forms a flow obstacle (11) in the main flow path.

4. Sanitary insert according to claim 3, characterized in that the discharge opening (10) opens into the main flow path downstream of the flow obstacle (11) in the flow direction.

5. Sanitary insert according to one of claims 1 to 4, characterized in that the fastening structure (4) and/or the outlet opening (10) are formed on the base body (12).

6. Sanitary insert according to one of claims 1 to 4, characterized in that the sealing element (7) is integrally formed on the base body (12) and/or is designed to be annularly encircling.

7. Sanitary insert according to claim 5, characterized in that the sealing element (7) is integrally formed on the base body (12) and/or is designed to be annularly encircling.

8. Sanitary insert according to one of claims 1 to 4, characterized in that the sealing element (7) seals radially and/or axially.

9. Sanitary insert according to one of claims 1 to 4, characterized in that the jet aeration device (8) is formed in the base body (12).

10. Sanitary insert according to claim 5, characterized in that the jet aeration device (8) is formed in the base body (12).

11. Sanitary insert according to claim 7, characterized in that the jet aeration device (8) is formed in the base body (12).

12. Sanitary insert according to claim 5, characterized in that the base body (12) is designed in one piece or in several pieces.

13. Sanitary insert according to claim 6, characterized in that the base body (12) is designed in one piece or in several pieces.

14. Sanitary insert according to claim 9, characterized in that the base body (12) is of one-piece or multi-piece design.

15. Sanitary insert according to claim 7, 10 or 11, characterized in that the base body (12) is designed in one piece or in several pieces.

16. Sanitary insert according to claim 5, characterized in that the basic body (12) is made of plastic.

17. Sanitary insert according to claim 6, characterized in that the basic body (12) is made of plastic.

18. Sanitary insert according to claim 9, characterized in that the basic body (12) is made of plastic.

19. Sanitary insert according to one of claims 7 or 10 to 14, characterized in that the basic body (12) is made of plastic.

20. Sanitary insert according to one of claims 1 to 4, characterized in that the sealing element (7) is formed on an upper part (13) of the base body (12) and the fastening structure (4) is formed on a lower part (14) of the base body (12).

21. Sanitary insert according to claim 20, characterized in that the upper part (13) is snap-connected with the lower part (14) and/or that the upper part (13) has a greater deformability than the lower part (14).

22. The sanitary insert of claim 21, wherein the deformable shape is an elastic deformable shape.

23. Sanitary insert according to one of claims 1 to 4, characterized in that the at least one discharge opening (10) is arranged at a distance from the fastening structure (4).

24. Sanitary insert according to one of claims 1 to 4, characterized in that a collecting space (15) is formed between the fastening construction (4) and the outflow side (3), by means of which collecting space water penetrating through a penetration path (20) between the fastening construction (4) and the cooperating fastening construction (6) can be collected.

25. Sanitary insert according to claim 24, characterized in that the collecting space (15) has an overflow opening (16) which opens into the filling inlet (9).

26. Sanitary insert according to claim 24, characterized in that a sealing lip (17) is formed on the outflow side (3), with which the collecting space (15) is sealed off in the outlet opening (5) towards the outside.

27. Sanitary insert according to one of claims 1 to 4, characterized in that the fastening means (4) is designed as a thread, which is designed with a mating thread on the outlet opening (5) of the sanitary fitting.

28. Sanitary insert according to one of claims 1 to 4, characterized in that a tool holder (18) is formed on the outflow side (3) for assisting the fastening process and/or the detachment process.

29. Sanitary insert according to claim 28, characterized in, that the tool seat (18) is a slot.

30. Outlet system comprising a sanitary insert according to one of claims 1 to 29, which is inserted into a water outlet (5) of a sanitary fitting, wherein the sealing element (7) of the sanitary insert (1) at least partially seals a gap (19) between the sanitary insert (1) and the water outlet (5).

31. The outlet system according to claim 30, wherein the flow resistance between the discharge opening (10) and the outflow side (3) is smaller than the flow resistance in the permeate path (20) formed between the fixture structure (4) and the mating fixture structure (6).

32. Use of a discharge opening (10) opening into a jet aeration device (8) for reducing permeate water discharged between a sanitary insert (1) and a water outlet (5) accommodating the sanitary insert (1), characterized in that the discharge opening (10) is arranged in a permeate path (20) of the permeate water upstream of a fastening structure (4) of the sanitary insert (1) and downstream of a sealing element (7) of the sanitary insert (1).

33. Use according to claim 32, wherein the sanitary insert (1) is a sanitary insert according to one of claims 1 to 29.

34. Use according to claim 32 or 33, wherein the sealing element (7) causes a pressure reduction in the permeation pathway (20).

35. The use according to claim 34, wherein the flow resistance generated by the sealing element (7) is greater than the flow resistance in a section of the main flow path in the sanitary insert (1) extending parallel to said sealing element.