EP3679199B1 - Jet regulator - Google Patents

Description

The invention relates, according to the preamble of claim 1, to a sanitary insert part, in particular a jet regulator, with a jet ventilation unit which has a mixing chamber, the mixing chamber having at least one ventilation opening, with at least one outside the mixing chamber entering the mixing chamber via the at least one ventilation opening outside air supplying ventilation duct is formed.

The invention further relates, according to the preamble of claim 19, to the use of a ventilation channel on a sanitary insert part of the type described at the beginning, which leads air into a mixing chamber of a jet ventilation unit of a sanitary insert part via a ventilation opening, for absorbing leakage flows through a fastening of the insert part a sanitary fitting.

Such sanitary insert parts are known, for example, as jet regulators and are used in the outlets of sanitary fittings in order to give an exiting water jet a desired property, for example a certain cross-sectional shape or a certain enrichment with air fractions.

Here it has become customary to seal the insert against the receiving sanitary fitting by a sealing ring so that no water escapes laterally past the outer circumference of the insert between the insert and the sanitary fitting.

It has been proposed to align the ventilation duct in such a way that water seeping laterally past the insert part is taken up before it can leak. This makes it possible, under certain conditions, to dispense with the sealing ring.

The invention is based on the object of developing an insert part of the type described at the outset in such a way that the absorption of seeping water is improved.

To achieve this object, the features of claim 1 are provided according to the invention. In the case of a sanitary insert of the type described at the outset, the invention proposes that the ventilation channel has two separate inflow openings, that one of the inflow openings opens laterally, and that the other of the inflow openings opens in a longitudinal direction of the insert. Since one of the inflow openings opens laterally, water can thus be absorbed from an outer circumferential side of the insert part. Since the other of the inflow openings opens in a longitudinal direction of the insert part, a configuration can thus be achieved in which an increase in an overall axial height of the insert part through the inflow opening can be avoided. It is therefore advantageous that a suction force that arises due to a negative pressure in the mixing chamber can be used to absorb unwanted water at one of the two inflow openings, with a major portion of the air flow in the ventilation channel being able to flow in through the other inflow opening. Thus, the two functions of the ventilation duct, namely the transport of a sufficient amount of air into the mixing chamber on the one hand and the reception and transport into the mixing chamber of water that otherwise might otherwise escape at an undesired location, on the other hand, can easily be decoupled from one another.

In an advantageous embodiment it can be provided that at least two separate ventilation channels are formed next to one another in the circumferential direction. So that is Total air flow can be easily divided into individual partial flows, which can be adjusted independently of one another depending on the respective requirements.

In general, at least two, in particular at least three, separate ventilation channels, preferably oriented essentially parallel or parallel to one another, can be formed.

In an advantageous embodiment, it can alternatively or additionally be provided that the ventilation channel extends over the outer circumference. A reduction in functionality due to individual clogged or soiled ventilation channels can thus be avoided or at least reduced. As an alternative or in addition, it can also be provided here that the ventilation channel is connected to two ventilation openings. This can help to achieve a desired stability of a wall of the mixing chamber through which the ventilation openings pass.

In an advantageous embodiment it can be provided that one of the inflow openings is arranged downstream of an external thread formed on a housing of the insert part. Thus, seepage water that seeps through the external thread in an installation situation between the insert and a sanitary fitting can be absorbed with this inflow opening, for example along a seepage path, and can be discharged into the mixing chamber. There the water can unite with a main jet. Here, the inflow opening can be arranged at the end of a thread turn. Water that flows in the thread can thus be completely or almost completely absorbed. The inflow opening can be arranged in such a way that it partially cuts into an axial region which is covered by the external thread. Thus, water can be absorbed at several points of a thread turn and / or from several threads of a multi-turn external thread. Alternatively, it can be provided that the inflow opening is formed completely outside of said axial region. A configuration can thus be achieved in which a screw property of the external thread is impaired as little as possible. The inflow opening can also be a collecting space, for example, the collecting space described in more detail below, be arranged downstream.

In an advantageous embodiment it can be provided that one of the inflow openings, for example the other inflow opening of the two inflow openings, is formed on an outlet end face of the insert part. A major proportion of the air that is sucked in can thus be absorbed as unhindered as possible, because this inflow opening can be arranged as close as possible to the surroundings of the sanitary fitting.

In an advantageous embodiment, it can be provided that ventilation channels are formed which are arranged uniformly distributed in the circumferential direction. In this way, the outlet end face of the insert can be used evenly for ventilation. It is also possible to achieve the most uniform possible coverage of the outer circumference with inflow openings for receiving seepage water. For example, it can be provided that the ventilation channels, in particular with respect to a longitudinal axis of the insert part, are arranged symmetrically. This gives the outlet end face an attractive appearance accessible.

In an advantageous embodiment, it can be provided that ventilation channels are formed which are arranged unevenly distributed in the circumferential direction. Thus, for example, the ventilation channels can be concentrated in circumferential sections in which the risk of leakage of seepage water is particularly high. For example, it can be provided that the ventilation channels, in particular with respect to a longitudinal axis of the insert part, are arranged asymmetrically.

It can generally be provided that the respective ventilation channel extends axially. In this case, the ventilation opening and the at least one inflow opening can be arranged in a common circumferential section which the ventilation opening and / or the at least one inflow opening can fill. The ventilation opening and the at least one inflow opening can have a matching width in the circumferential direction. The ventilation channel can have a constant width in the circumferential direction along its course.

It can also be provided that both inflow openings of a ventilation channel are arranged in a common circumferential section which one inflow opening or both inflow openings can fill. Here, too, it can be provided that the ventilation channel has a constant width in the circumferential direction along its course.

In an advantageous embodiment, it can be provided that outside the mixing chamber a first ventilation channel is formed, which supplies air from the outside via the at least one ventilation opening into the mixing chamber Distance is arranged that a third ventilation channel is arranged immediately adjacent to the first ventilation channel in the circumferential direction at a second distance and that the first distance and / or the second distance is larger than a width in the circumferential direction of the first, second and / or third ventilation channel . It is thus possible to achieve a configuration of the insert part in which unusually wide webs are formed between the ventilation channels and thus between the ventilation openings. As a result, the available cross-sectional area of the ventilation openings can be reduced in a simple manner in order to increase an air flow velocity in the ventilation channels. It has been shown that an improved uptake of seepage water at an inflow opening can be achieved with an increased air flow velocity. The use of more than two ventilation channels has the advantage that the ventilation channels can be concentrated separately from one another at more than two points. Thus, a cross-sectional area of the ventilation ducts that cannot be used for taking up seepage water can be avoided in order to achieve the highest possible air flow velocity. This solution can advantageously be combined with the preceding solution.

Here, the term “immediately adjacent” can, for example, be characterized in such a more precise manner that there is no further ventilation channel between two immediately adjacent ventilation channels is arranged.

In an advantageous embodiment, it can be provided that outside the mixing chamber a first ventilation channel leading air from the outside via the at least one ventilation opening into the mixing chamber is formed, alternatively or additionally it is proposed that a second ventilation channel in a first immediately adjacent to the first ventilation channel in the circumferential direction Is arranged at a distance that a third ventilation channel is arranged immediately adjacent to the first ventilation channel in the circumferential direction at a second distance and that the first distance is formed larger than the second distance. Thus, the advantages described above of a concentrated arrangement of several separate ventilation channels in a circumferential section on the one hand and the formation of circumferential sections which are free of ventilation channels on the other hand can be combined with one another. This solution can advantageously be combined with one or more of the preceding solutions.

Here too, the term “immediately adjacent” can be characterized more precisely, for example, in such a way that no further ventilation channel is arranged between two immediately adjacent ventilation channels.

In an advantageous embodiment, it can be provided that the second distance is formed larger than a width in the circumferential direction of the first ventilation channel. Thus is a The negative pressure that forms in the mixing chamber can be used particularly well for the formation of the highest possible air flow velocity at those points where there is a risk of seepage water. In particular, it can be provided that the second distance is at least twice as large as the width of the first ventilation channel in the circumferential direction. In this way, a suitable ratio of open areas of a wall of the mixing chamber to an overall circumference of the wall can be achieved in a simple manner.

In an advantageous embodiment, it can be provided that the first distance is designed to be smaller than a width in the circumferential direction of the first ventilation channel. In this way, ventilation channels that are separate from one another can be arranged particularly close to one another at desired locations. In particular, it can be provided that the first distance is at most half as large as the width of the first ventilation channel in the circumferential direction.

In an advantageous embodiment, it can be provided that the mixing chamber between the ventilation channels is closed to the outside. In this way, the entry of additional intake air, which would reduce an air flow velocity in the ventilation ducts, can be avoided.

In an advantageous embodiment, it can be provided that two ventilation channels that are adjacent in the circumferential direction are separated from one another by a partition. Adjacent ventilation channels can thus be easily decoupled from one another.

In an advantageous embodiment it can be provided that one, for example the already mentioned, width in the circumferential direction of one, for example the already mentioned, first Ventilation channel is matched to a width of one, for example the already mentioned, laterally open inflow opening. A maximum air flow velocity at the level of the inflow opening can thus be selected. It is particularly favorable if this applies to all ventilation channels.

In an advantageous embodiment, it can be provided that a ratio of a sum of lengths covered by ventilation channels in the circumferential direction to a total length of an outer circumference of the mixing chamber, measured at the height of one inflow opening of the two inflow opening, is at most 60%. It has been shown that in this way it is already possible to achieve useful air flow velocities. For example, the sum of the lengths is at most 50%, at most 40% or very particularly preferably at most 35% or even at most 33% of the total length. In general, it can be said that a higher air flow rate is beneficial for better absorption of seepage water and that a reduced ratio is better for a higher air flow rate. The respective lengths can be measured, for example, at the level of one of the two inflow openings, in particular the lateral inflow opening.

Here, in an advantageous embodiment, at least three ventilation channels can be formed.

As an alternative or in addition, two inflow windows can be formed per ventilation channel.

As an alternative or in addition, the ventilation channels can be designed higher (in the radial direction) than they are wide (in the circumferential direction).

In an advantageous embodiment, it can be provided that the mixing chamber is preceded by a jet splitter that forms at least one nozzle. In this way, a negative pressure can be generated in the mixing chamber in a simple manner, which results from an inflow-side working pressure of the water.

In an advantageous embodiment, it can be provided that a quantity regulator is connected upstream of the mixing chamber. Thus, defined pressure conditions in the mixing chamber can be achieved independently or largely independently of fluctuations in an inflow-side working pressure.

In an advantageous embodiment, it can be provided that the mixing chamber is followed by an outlet grille. An attractive spray pattern can thus be achieved. A proportion of air sucked in through an outlet opening can be reduced.

In an advantageous embodiment, it can be provided that one, for example the already mentioned, laterally open inflow opening of the ventilation channel is connected to a collecting space that is closed to the outside, at least in the position of use. In this way, seepage water can, for example, be collected over the entire circumference and through limited inflow openings be released into ventilation ducts. The collecting space can be designed to be closed on the other side of the inflow opening, so that only a small part of air flows in via this inflow opening during operation and the inflow opening works essentially or even exclusively in the manner of an overflow.

In an advantageous embodiment, it can be provided that the at least one ventilation channel on a circumferential side of the insert part is designed to be closed to the outside. Thus, flow conditions in the ventilation duct can be developed independently of a design of a receiving sanitary fitting.

In an advantageous embodiment, it can be provided that the ventilation duct has a cross section which is dimensioned such that an air flow speed of at least 15 km / h is established in the ventilation duct with an inlet-side water working pressure between 1 and 2 bar. For example, the air flow velocity can be measured at the level of a laterally opened inflow window, in particular for example the already mentioned inflow window. It has been found that above the mentioned threshold for the air flow velocity, particularly favorable conditions for the most complete possible absorption of seepage water in the air flow can be reached. This solution can advantageously be combined with one or more of the preceding solutions.

It is particularly favorable if the air flow speed is at least 17 km / h. In general, it can be said that a higher air flow velocity results in better absorption of water at an inflow opening.

In an advantageous embodiment, it can be provided that at least one seepage path opens into the ventilation channel, which path runs via an external thread on the outer circumference of the insert part. A seal on the external thread can thus be dispensed with or at least reduced in terms of a sealing effect. Such a seepage path can, for example, be formed randomly or be given by at least one thread turn.

According to the invention, a use of a ventilation duct on a sanitary insert according to the invention according to one of claims 1 to 18 is proposed, with a ratio of a sum of lengths covered by ventilation ducts, in particular at a level of at least one inflow opening that absorbs the leakage flow, in the circumferential direction a total length of an outer circumference of the mixing chamber is at most 60% in height. It has been shown that with a ratio below the specified threshold it is already possible to achieve sufficiently high air flow velocities.

For example, it can be provided that the ratio is at most 50% or at most 40% or at most 35% or at most 33%. This means that ever higher air flow speeds can be achieved in the ventilation ducts.

The invention will now be described in more detail using an exemplary embodiment, but is not limited to this exemplary embodiment. Further exemplary embodiments result from the combination of the features of individual or several protection claims with one another and / or with individual or several features of the exemplary embodiment.

Fig. 1

ein erfindungsgemäßes sanitäres Einsetzteil in teilweise aufgeschnittener dreidimensionaler Schrägansicht,

Fig. 2

das Einsetzteil aus Figur 1 in einer Ansicht von unten auf die Auslaufstirnseite,

Fig. 3

das Einsetzteil aus Figur 1 mit herausgenommenen Innenteilen und abgenommenem Vorsatzsieb in teilweise aufgeschnittener dreidimensionaler Schrägansicht,

Fig. 4

eine Ansicht auf das Einsetzteil aus Figur 1 zur Verdeutlichung der Lage des Schnitts in Figur 3,

Fig. 5

das Einsetzteil aus Figur 1 mit herausgenommenen Innenteilen und abgenommenem Vorsatzsieb in einer weiteren teilweise aufgeschnittenen dreidimensionalen Schrägansicht,

Fig. 6

eine Ansicht auf das Einsetzteil aus Figur 1 zur Verdeutlichung der Lage des Schnitts in Figur 3,

Fig. 7

das Einsetzteil aus Figur 1 mit herausgenommenen Innenteilen und abgenommenem Vorsatzsieb und Strahlzerleger in einer weiteren teilweise aufgeschnittenen dreidimensionalen Schrägansicht,

Fig. 8

zwei Ansichten auf das Einsetzteil zur Verdeutlichung der Lage des Schnitts in Figur 7,

Fig. 9

das Einsetzteil aus Figur 1 mit herausgenommenen Innenteilen und abgenommenem Vorsatzsieb in einer weiteren teilweise aufgeschnittenen dreidimensionalen Schrägansicht,

Fig. 10

zwei Ansichten auf das Einsetzteil zur Verdeutlichung der Lage des Schnitts in Figur 7,

Fig. 11

das Einsetzteil aus Figur 1 mit herausgenommenen Innenteilen und abgenommenem Vorsatzsieb in einer weiteren teilweise aufgeschnittenen dreidimensionalen Schrägansicht und

Fig. 12

zwei Ansichten auf das Einsetzteil zur Verdeutlichung der Lage des Schnitts in Figur 11.

It shows:

Fig. 1

a sanitary insert according to the invention in a partially cut-open three-dimensional oblique view,

Fig. 2

the insert Figure 1 in a view from below of the outlet face,

Fig. 3

the insert Figure 1 with removed inner parts and removed attachment screen in a partially cut-open three-dimensional oblique view,

Fig. 4

a view of the insert Figure 1 to clarify the position of the cut in Figure 3 ,

Fig. 5

the insert Figure 1 with removed inner parts and removed attachment screen in another partially cut-open three-dimensional Oblique view,

Fig. 6

a view of the insert Figure 1 to clarify the position of the cut in Figure 3 ,

Fig. 7

the insert Figure 1 with removed inner parts and removed attachment screen and jet splitter in another partially cut-open three-dimensional oblique view,

Fig. 8

two views of the insert to clarify the position of the cut in Figure 7 ,

Fig. 9

the insert Figure 1 with removed inner parts and removed attachment screen in another partially cut-open three-dimensional oblique view,

Fig. 10

two views of the insert to clarify the position of the cut in Figure 7 ,

Fig. 11

the insert Figure 1 with removed inner parts and removed attachment screen in a further partially cut-open three-dimensional oblique view and

Fig. 12

two views of the insert to clarify the position of the cut in Figure 11 .

The figures are described together below.

A sanitary insert part designated as a whole by 1 has, in a manner known per se, a housing 2 in which a jet ventilation unit 3 is formed. The jet ventilation unit 3 has a jet splitter 4 which has nozzles 5. In the exemplary embodiment, the jet splitter 4 has a perforated plate 33 which provides the nozzles 5. In further exemplary embodiments, the jet splitter has a diffuser with a diffuser ring known per se which provides an annular nozzle.

A mixing chamber 6 is connected downstream of the jet splitter 4. The water exiting through the nozzles 5 generates a negative pressure in the mixing chamber 6 through which air flows in via ventilation openings 7 which are formed in a wall 8 of the mixing chamber 6.

At least one ventilation channel 9 is formed outside the mixing chamber 6. Each ventilation channel 9 is connected to an associated ventilation opening 7.

Each ventilation channel 9 thus supplies air from the outside via the associated ventilation opening 7 into the mixing chamber 6. There the supplied air mixes with the water that emerges from the nozzles 5 in order to generate a water-air mixture.

The mixing chamber 6 is followed by a plurality of jet formers 10, by means of which the aerated jet is shaped before it emerges from the outlet end face 11.

In the exemplary embodiment, the beam shaper 10 is formed by two grids 12, 13 and a rectifying outlet grille 14. In further exemplary embodiments, other numbers and shapes of inner parts and outlet structures are implemented.

In the exemplary embodiment shown, an attachment screen 15 covers the jet splitter 4 on the inflow side.

In further exemplary embodiments, a quantity regulator or a throttle or another functional element can be arranged between the attachment screen 15 and the jet splitter 4.

Particularly off Figure 9 it can be seen that each ventilation channel 9 has two inflow openings 16, 17 that are separate from one another. This creates a Y-shaped topology of the ventilation channel 9, which brings the inflow openings 16, 17 together and guides them to the associated ventilation opening 7.

The main flow of the ventilation channel 9 is sucked in through the axial inflow opening 17, while only a small proportion of air passes through the lateral inflow opening 16 into the ventilation channel 9 during use.

By comparing the Figures 3 and 5 it can be seen that at least two separate ventilation channels 9, 18 are formed next to one another in the circumferential direction.

An external thread 20 is formed in the housing 2 on an outer circumferential side 19 of the insert part 1. With the external thread 20, the insert part 1 can be screwed into an outlet of a sanitary fitting. In a further exemplary embodiment, the external thread is formed on a holding sleeve of a housing 2 which is threadless per se.

One of the inflow openings 16 is arranged downstream of the external thread 20 and opens laterally.

The other inflow opening 17 of the two inflow openings 16, 17 is formed on the outlet end face 11 of the insert part 1 and opens in a longitudinal direction 21 of the insert part 1.

The total of four ventilation channels 9, 18, 22, 23 are arranged distributed unevenly in the circumferential direction.

The ventilation channel 9 can be regarded as the first ventilation channel, the ventilation channel 22 as the second ventilation channel, the ventilation channel 18 as the third ventilation channel and the ventilation channel 23 as the fourth ventilation channel.

The second ventilation channel 22 is directly adjacent to the first ventilation channel 9 in the circumferential direction. The third ventilation channel 18 is also directly adjacent to the first ventilation channel 9 in the circumferential direction.

Here, a first distance 24 in the circumferential direction (measured for example as an angle or as an arc length) between the first ventilation channel 9 and the second ventilation channel 22 is more than twice as large as a width 25 in the circumferential direction of the ventilation opening 7. The corresponding second distance 26 between the first In contrast, the ventilation channel 9 and the third ventilation channel 18 are less than half the size of the width 25 and thus significantly smaller than the first distance 24.

Overall, the result is an arrangement of ventilation channels 9, 18, 22, 23 which has a symmetry with two intersecting mirror planes.

The mixing chamber 6 is closed on the outer circumference between the ventilation channels 9, 18, 22, 23. The adjacent ventilation channels 9, 18 are separated from one another by a partition 27.

Between the ventilation channels 9 and 22 on the one hand and 18 and 23 on the other hand, two blind channels 28 are formed, which are open at the outlet end face 11, but are otherwise closed. A highly symmetrical arrangement is thus achieved at the outlet end face 11, compare Figure 2 .

The ventilation channels 9, 18, 22, 23 each have a uniform width 29 in the circumferential direction along their course. This width 29 in the circumferential direction is matched to a width 30 of the laterally open inflow opening 16.

A ratio of the sum of the lengths (for example as an angle or as an arc length) which are covered at the level of the inflow openings 16 by the four ventilation channels 9, 18, 22, 23 to the total length of an outer circumference of the mixing chamber 6 (measured for example on the outside on the wall 8), also measured at the height of the inflow openings 16, is approximately 31%.

On the outer circumference, the wall 8 of the housing 2 is adjoined by a collecting space 31, which is closed with a sanitary fitting in the deployed position to the outside by a sealing element 32 - here a circumferential sealing lip.

Each laterally open inflow opening 16 of each ventilation channel 9, 18, 22, 23 is connected to the collecting space 31 so that water that seeps through the external thread 20 can escape from the respective inflow opening 16 into the associated ventilation channel 9, 18, 22, 23 .

Each of the ventilation channels 9, 18, 22, 23 is designed on a peripheral side of the insert part 1 to be closed to the outside.

Each ventilation channel 9, 18, 22, 23 has a cross-section which is dimensioned such that with an inlet-side water working pressure in front of the jet splitter 4 between 1 and 2 bar or with a pressure drop of 1 to 2 bar above the jet splitter 4 in each ventilation channel 9, 18, 22, 23 sets an air flow speed at the level of the respective laterally open inflow window 16 of at least 17 km / h.

The water that emerges from the first inflow openings 16 into the respective ventilation duct 9, 18, 22, 23 can thus be absorbed and transported into the mixing chamber 6. There the entrained water mixes with the water flowing out of the nozzles 5.

Each thread turn of the external thread 20 forms a seepage path 34 through which water can seep from the inlet side during use, since no sealing ring is provided. This water is collected in the collecting space 31 and fed through the first inflow openings 16 and the ventilation channels 9, 18, 22, 23 of the mixing chamber 6, so that no leakage water can escape from the side of the insert 1 from the sanitary fitting during use.

Thus, in the position of use, the exemplary embodiment implements the use of a ventilation channel 9, 18, 22, 23 on a sanitary insert part 1, which leads via a ventilation opening 7 into a mixing chamber 6 of a jet ventilation unit 3 of the sanitary insert part 1, for absorbing leakage flows through a fastening of the insert part 1 on a sanitary fitting.

Here, the already described ratio of a sum of lengths covered by all ventilation channels 9, 18, 22, 23 at a level of the inflow openings 16 receiving the leakage flow in the circumferential direction to a total length of an outer circumference of the mixing chamber 6 at a height of approximately 31%.

In the case of an insert 1, it is therefore proposed according to the invention that the entire cross section of the ventilation channels 9, 18, 22, 23 of a jet ventilation unit 3 is reduced by the ratio to the outer circumference of a mixing chamber 6 so that an air flow picks up a leakage flow on the seal-free outer circumference of the insert 1 and in the mixing chamber 6 transported.

List of reference symbols

1

sanitary insert

2

casing

3

Jet ventilation unit

4th

Jet splitter

5

jet

6th

Mixing chamber

7th

Ventilation opening

8th

Wall

9

(first) ventilation duct

10

Beam shaper

11

Outlet face

12th

Inlay grids

13th

Inlay grids

14th

Outlet grille

15th

Attachment screen

16

Inflow opening

17th

Inflow opening

18th

(third) ventilation channel

19th

Outer peripheral side

20th

External thread

21

Longitudinal direction

22nd

(second) ventilation duct

23

(fourth) ventilation channel

24

(first) distance

25th

Width of 7

26th

(second) distance

27

partition wall

28

Blind channel

29

Width of 9, 18, 22, 23

30th

Width of 16

31

Containment area

32

Sealing element

33

Perforated plate

34

Seepage path

Claims (19)

1. Sanitary insert part (1) having a jet aeration unit (3) which has a mixing chamber (4), wherein the mixing chamber (6) has at least one aeration opening (7), wherein, outside the mixing chamber (6), there is formed at least one aeration channel (9, 18, 22, 23) which feeds air into the mixing chamber (6) from the outside via the at least one aeration opening (7), characterized in that the aeration channel (9, 18, 22, 23) has two mutually separate inflow openings (16, 17), in that one of the inflow openings (16, 17) opens laterally, and in that the other of the inflow openings (16, 17) opens in a longitudinal direction (21) of the insert part.
2. Sanitary insert part (1) according to the preceding claim, characterized in that at least two mutually separate aeration channels (9, 18, 22, 23) are formed next to one another in the circumferential direction, and/or in that the aeration channel (9, 18, 22, 23) extends over the outer circumference and/or is connected to two aeration openings (7).
3. Sanitary insert part (1) according to the preceding claim, characterized in that one of the inflow openings (16, 17) is arranged so as to be downstream of an outer thread (20) which is formed on a housing (2) of the insert part.
4. Sanitary insert part (1) according to one of the preceding claims, characterized in that one of the inflow openings (16, 17) is formed at an outlet face side (11) of the insert part.
5. Sanitary insert part (1) according to one of the preceding claims, characterized in that aeration channels (9, 18, 22, 23) arranged so as to be distributed uniformly, in particular symmetrically, in the circumferential direction are formed, or in that aeration channels (9, 18, 22, 23) arranged so as to be distributed non-uniformly, in particular asymmetrically, in the circumferential direction are formed.
6. Sanitary insert part (1) according to one of the preceding claims, wherein, outside the mixing chamber (6), there is formed a first aeration channel (9) which feeds air into the mixing chamber (6) from the outside via the at least one aeration opening (7), characterized in that a second aeration channel (22) is arranged with a first spacing (24) directly adjacent to the first aeration channel (9) in the circumferential direction, in that a third aeration channel (18) is arranged with a second spacing (26) directly adjacent to the first aeration channel (9) in the circumferential direction, and in that the first spacing (24) and/or the second spacing (26) are/is configured to be larger than a width in the circumferential direction of the first, second and/or third aeration channel (18).
7. Sanitary insert part (1) according to one of the preceding claims, wherein, outside the mixing chamber (6), there is formed a first aeration channel (9) which feeds air into the mixing chamber (6) from the outside via the at least one aeration opening (7), characterized in that a second aeration channel (22) is arranged with a first spacing (24) directly adjacent to the first aeration channel (9) in the circumferential direction, in that a third aeration channel (18) is arranged with a second spacing (26) directly adjacent to the first aeration channel (9) in the circumferential direction, and in that the first spacing (24) is configured to be larger than the second spacing (26).
8. Sanitary insert part (1) according to either of the preceding Claims 6 and 7, characterized in that the second spacing (26) is configured to be larger than, in particular at least twice as large as, a width in the circumferential direction of the first aeration channel (9).
9. Sanitary insert part (1) according to one of the preceding Claims 6 to 8, characterized in that the first spacing (24) is configured to be smaller than, in particular at most half as large as, a width in the circumferential direction of the first aeration channel (9).
10. Sanitary insert part (1) according to one of the preceding claims, characterized in that the mixing chamber (6) is closed off to the outside between the aeration channels, and/or in that two aeration channels which are adjacent in the circumferential direction are separated from one another by a separating wall (27).
11. Sanitary insert part (1) according to one of the preceding claims, characterized in that the or a width in the circumferential direction of a or of the first aeration channel (9), in particular of all the aeration channels (9, 18, 22, 23), is matched to a width of a or of the lateral open inflow opening.
12. Sanitary insert part (1) according to one of the preceding claims, characterized in that a ratio of a sum of lengths covered in the circumferential direction by the aeration channels (9, 18, 22, 23), in particular measured at a height of one of the two inflow openings (16, 17), to a total length of an outer circumference of the mixing chamber (6), measured at the height of the one inflow opening (16, 17) of the two inflow openings (16, 17), is at most 60%, preferably at most 50%, particularly preferably at most 40%, or very particularly preferably at most 35% or at most 33%.
13. Sanitary insert part (1) according to one of the preceding claims, characterized in that a jet splitter (4) which forms at least one nozzle (5) is arranged upstream of the mixing chamber (6).
14. Sanitary insert part (1) according to one of the preceding claims, characterized in that a flow regulator is arranged upstream of the mixing chamber (6), and/or in that an outlet grid is arranged downstream of the mixing chamber (6).
15. Sanitary insert part (1) according to one of the preceding claims, characterized in that the or a laterally open inflow opening of the aeration channel (9, 18, 22, 23) is connected to a collecting space (31) which is closed to the outside at least in a position of use.
16. Sanitary insert part (1) according to one of the preceding claims, characterized in that the at least one aeration channel (9, 18, 22, 23) is formed to be closed to the outside on a circumferential side of the insert part.
17. Sanitary insert part (1) according to one of the preceding claims, characterized in that the aeration channel (9, 18, 22, 23) has a cross section which is dimensioned such that, at an inlet-side water working pressure of between 1 and 2 bar, an air flow speed, in particular at the height of a laterally open inflow window, of at least 15 km/h, preferably at least 17 km/h, is established in the aeration channel.
18. Sanitary insert part (1) according to one of the preceding claims, characterized in that at least one trickling path (34) opens out into the aeration channel (9, 18, 22, 23), said trickling path extending over an outer thread (20) at the outer circumference of the insert part.
19. Use of an aeration channel at a sanitary insert part according to one of the preceding claims, which aeration channel leads into a mixing chamber (6) of a jet aeration unit (3) of a sanitary insert part (1) via an aeration opening (7), for receiving leakage flows by way of a fastening of the insert part to a sanitary fitting, characterized in that a ratio of a sum of lengths covered in the circumferential direction by aeration channels (9, 18, 22, 23), in particular at a height of at least one inflow opening receiving the leakage flow, to a total length of an outer circumference of the mixing chamber (6) at the height is at most 60%, preferably at most 50%, particularly preferably at most 40%, or very particularly preferably at most 35% or at most 33%.

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