DE8512416U1 - Water basin with air bubble device - Google Patents

Description

• -RAIrEN-TANWALT-GRIGOR SCHUSTER

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April 9, 1985/1038

Günter Schüssler, 8000 Munich

Water basin with air bubble device

State of the art

The invention is based on a water basin with an air bubble device according to the genre of the main claim. In such water basins with an air bubble device, massage purposes are used, with underwater basins a hand or foot wash basin, a bathtub, but also a whirlpool or larger basin. The massage effect will achieved by an air and / or water jet which is introduced into the water in the water basin through the corresponding nozzles. Through this On the one hand, the water in the water basin is moved and revitalized and, on the other hand, the body parts exposed to this jet become immediately massaged. In these generic iWater basins with an air bubble device known in many ways, the water is through a The pump is sucked out of the inside of the pool and inserted back into the inside of the pool via the water nozzle to generate a jet. The air is over a Compressed fan and blown into the inside of the pool via an air nozzle. In order to be able to supply air and water to the individual nozzles, extensive pipelines are required around the water basins, which have a considerable amount of space Require space. Since mostly air and water nozzle in one unit are assembled, connection nipples for air must be connected to the inlet side of the nozzle

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and for water to which the pipelines or Hoses are connected, which requires additional space and brings with it a constant risk of leaks. In many cases the connection points of these nozzles are no longer accessible after the installation of the water basin from outside the basin, so that such leaks can only be remedied by expanding the entire basin.

In a known water basin of this type (US-PS 42 33 694) is the Nozzle inserted on the inside of the basin and clamped to the basin on the outside of the basin, at the same time a seal for the bore receiving the nozzle in the basin wall to the outside, and it is at the nozzle on the outside of the basin a T-piece is installed, which is connected to the pipeline which leads to several nozzles and which surrounds the pool. As in this example of a known water basin, such a pipe and nozzle installation disadvantageously requires a considerable amount of assembly time, Quite apart from the cost of the large number of small assembly parts, pipes, fitting seals, adhesives, welding tools, hose clips, Pipe points etc. Each of the individual sealing points harbors the risk of leakage, which is still promoted by the constant temperature changes in such water basins.

These naul parts are also not reduced in hot tubs where the Splash water is collected outside the water basin, so that the water pump of the circulation system, the jets of water can be taken from these surge water tanks. On the contrary, it may be the case that by the arrangement the surge water tank, the accessibility to the nozzles and pipes is impaired.

Not least, these known systems have the disadvantage that due to the required construction volume, the lines have the smallest possible cross-section have, which on the one hand result in high flow losses and on the other hand the elasticity of the system is correspondingly low.

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Advantages of the invention

The water basin according to the invention with the characterizing features of the chiefs, in which the channels are formed as it were in the basin wall running cavities, has the advantage that there are almost no sealing problems. If necessary, the nozzles are advantageously inserted from the inside of the pool, and only connections to the outside are required that connect the water or air pressure generator, such as a pump or a water pipe system, to these integrated channels * These points can be arranged in this way be that they are easily accessible because they can be provided regardless of the location of the nozzles. The air and water outlet openings can be achieved in a simple manner by drilling through the basin wall, after which the nozzle body can be inserted into such a bore from the inside of the basin.

The channels can be flat and, due to their width, are available standing pool wall are chosen accordingly wide, so that a large average cross-section is given despite low volume application. In the case of water basins made of plastic, for example acrylic glass or GRP (glass fiber reinforced Polyester), the channels can be obtained by laminating the channel wall, which is not formed by the pool wall can be obtained from half-shells on the pool wall. Of course £> is me It is conceivable that the channels can be inserted directly into the existing ones using a manufacturing process Plastic is incorporated. In the case of poured water basins, these channels can also be poured in, for example in the manner of a melt-out process, as it is common today in cast boiler construction. When using steel water tanks, the channels can be attached to the The outer wall of the pool wall can be welded on. Of course, it is also possible to gain the channels by placing them on the inside of the pool wall such, the channels delimiting shells or delimiting parts are placed. This makes the requirements for tightness essential degraded.

Of course, an embodiment according to the invention is also conceivable in which the Channels through a merely double-walled design of the entire basin

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would be formed. Stiffening webs between the walls would limit the ducts develop.

An additional advantage of the channel design according to the invention is that that the inner surface of the channel can be protected against corrosion relatively easily. Since it is a channel, you can use it Channel coating agents are passed, which are then deposited on the surface. These can be plastics, but also metallic materials, such as zinc. Such corrosion protection will always be desirable when the water basin and / or the delimitation parts Iron, for example sheet steel, exist.

Another advantage of the channel design according to the invention is that that heating elements can be accommodated very easily in such channels Being able to reheat or heat up air or water before entering the pool.

The embodiment of the invention with the features of claim 3 has the The advantage is that by removing the manhole cover towards the interior of the water basin, no external seal has to be loosened. By removing the Manhole cover, the nozzles on the back are accessible, for example to l |

to carry out a replacement that may be necessary in the case of aggressive water. In addition, the channel formed in this way can serve to guide the water and hoses can be inserted in this channel for the air flow, see above that leaks cannot affect the outside world. In the case of water basins with an integrated splash water tank, the channels between the splash water tank and water basin interior and be arranged in the described Kind of be accessible from the water basin interior.

According to embodiments of the invention, the water channel within the The air channel or the air channel can be arranged within the water channel or they can run next to one another, with only one web between the channel cover part and basin wall to separate the channels is required. Of course, detachable channels according to the invention can also be combined with channels of the known type, for example by dufch the water-bearing channel a cavity is formed in the water basin and the air-conducting

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Channel through a hose that led into or outside of this cavity or that the duct carries water and the hose carries air.

It is particularly advantageous if the channel or channels under the water basin floor are guided and accordingly on the bottom side of the water basin Nozzles are provided. The invention enables nozzles that do not protrude beyond the inner surface of the basin wall, for example through only one Bore are formed in the wall so that the bather does not get out of the Wall protruding nozzle body on the bowl side of the water basin disturb.

The embodiment of the invention with the features of claim 7 has the Advantage that in the air channel from the water basin or the water channel penetrating water not outside the collection area given by the basin got. Correspondingly, such an air duct can be ventilated upwards towards the pool edge through slots, via which also depending on the design of the water basin according to the invention also the air for air bubble formation can be sucked in. The air duct is preferably laid out in such a way that the air duct is not flooded when a fan is used can be. The air duct is preferably spatially above the water duct arranged so that it can be ventilated more easily. The ventilation of this air duct can also take place via an air regulating valve, so that the The amount of air drawn in from this air duct via the nozzles can be controlled.

Which can be combined in particular with the features of claims 1 to 10 Features of claim 11 have the advantage that special insert tubs can be designed for any type of existing old pool. Due to the small spatial extent of the canals according to the invention can be a water basin according to the invention with little loss of space in almost every old basin can be installed as an insert. For example, the further development of the insert basin can have advantageous indentations, such as those for the armrest and are desirable for water volume saving to accommodate the Rear channels are used. In this way, existing bathtubs can be used with little loss of volume and little effort, i.e. without dismantling same to be converted into "whirlpools". The additional effort compared to vain, carried out in a known manner, in an old tub-

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The new tub can only be seen in the channels provided. That's how it is It is possible to go from an old bathtub renovation to a whirlpool bath in two steps by using a water basin according to the invention in a first step is used, in which then later in the installed state the nozzles after drilling of the holes receiving the nozzle body and the channels already present in the first step are connected.

The features claimed in claim 13 are advantageous on the one hand Embodiment of the invention and on the other hand one claimed for itself Invention, which is also at. Water basin of the known type can be used. Of the The advantage of pulsing the water and / or air jet on the one hand has the advantage that, due to the intermittent acceleration of the mass, a special a good massage effect is brought about and, moreover, the water in the water basin can also be revitalized. The channels according to the invention have the advantage when using a pulsating water or air jet that, in contrast to a channel with a circular cross-section, they yield resiliently can and thus dampen impulses that are too strong, but can strengthen weak impulses. The pulsation of the beam can according to the invention by causes the flow rate to be intermittent, the intermittent being over the flow interrupting means or means intermittently through the medium to generate a flow can take place. The former can, for example, use a simple rotating circuit breaker Kind of like a gear or done through a flutter valve. As the medium abruptly promoting means can serve a diaphragm pump, which also the Has the advantage of being much cheaper and less sensitive than usual used rotating pumps.

The embodiment of the invention with the features of claim 18 has the advantage that the nozzle can be installed and accessed from inside the water basin is, advantageously due to the independent attachment of the inner nozzle Versatile configurations of this air-water nozzle combination from the outer nozzle are possible * Depending on your needs, this after the Venturi principle working nozzle combination that entrains the second medium Direct jet can be supplied via the outer or inner nozzle. As a rousing jet of pressure, either air or that can again be used Serve water, so that, for example, only the water supplied under pressure

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would have to be carried away and the air sufficiently entrained and thereby in the inside of the pool could be introduced - the air duct only needs to be open to the outside. According to further refinements, such a Be nozzle combination so that the outer nozzle or inner nozzle are adjustable, for example axially or by turning, so that with simple from Water basin umbrellas from feasible handles on the nozzle combination the ratios of water and air to one another can be changed, and the amount of air and / or water can also be regulated or switched off. So it is also conceivable that the medium penetrating through the outer nozzle occurs tangentially so that a swirl can be superimposed on the jet. According to the invention it is also possible that a nozzle body is arranged in the water basin wall, which deflects the air / water jet, d. H. that it depends on the rotational position of the nozzle body changes its jet direction. The inner nozzle can be used for this the connecting pieces protrude centrally into the inlet part of the nozzle body, while towards the exit of the nozzle body its opening eccentrically to Inner nozzle runs so that the deflection described takes place depending on the rotational position. It is of course conceivable according to the invention that such a beam deflection can be achieved by changing the axial position of the two parts to one another, namely from nozzle to nozzle body.

According to an additional embodiment of the invention, the inner nozzle is used pressurized supply air and the radial openings suck that Water directly from the inside of the pool. This can be done in the simplest manner in that the radial openings arranged in the nozzle body are immediately surrounded by water located inside the water basin. It is only necessary to use the pressurized nozzle via the inner nozzle Blow in air so that water is then discharged through the radial openings the water basin through the nozzle wip.de "radiates into the water basin.

Further advantages and advantageous embodiments of the invention are The following description, the drawing and the claims can be found.

drawing

Two embodiments of the subject invention have variants

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shown in the drawing and are described in more detail below. It demonstrate:

Fig. 1 shows a water basin according to the invention in cross section with left and

one variant on the right,
2 shows a vertical longitudinal section through the water basin with a view of the second variant;

3 and 4 vertical cross-sections through two further channel variants;

FIGS. 5 and 6 show a longitudinal section and cross section, corresponding to FIGS. 1 and 2, of the second exemplary embodiment;

7 shows a variant of the channel guide in a top view of the second exemplary embodiment and

8 to 11 four further variants of built-in nozzles in longitudinal section.

Description of the exemplary embodiments

In the case of what is shown in Fig. 1 and 2 in cross-section and longitudinal section - £

water basin, which can be a whirlpool, for example, is separated by a basin |

wall 1 and with this externally connected boundary part 2 a channel system formed with cavities 3 for water and 4 for air. The cavities 3 used to conduct water are connected via a central line 5 is supplied with pressurized water from a pump (not shown) or from a water pipe system, the pump in the first case takes the water from the interior 6 of the water basin or from a surge water tank, not shown. From the cavities 3 the pressurized water is passed through nozzles 7, which are arranged below the water level of the interior 6, into the pool water. These nozzles 7 have a nozzle body 8 inserted into the basin wall 1, the rear end 9 of which enters the cavity filled with water 3 protrudes.

Coaxially with the nozzle body 8, it protrudes into the inner bore 10 of the same a pipe socket 11 is attached to the delimitation part 2, via which air can be supplied. Since the arrangement of the nozzle body and pipe socket in Art a water jet pump is provided due to the Bernoulli effect

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Via the pipe socket 11 through the ring channel between the inner bore 10 and pipe socket 11 through the nozzle 7 flowing water entrained air that allows the desired Luftsprüdelvor direction.

In FIG. 1, two variants of this first in FIGS. 1 and 2 are side by side shown embodiment. In the variant shown on the right the pipe socket 11 is connected via a hose 14 to a suction air valve 15 which is inserted in the upper edge 16 of the water basin. This air intake valve 15 can be designed as a regulating valve in order to thereby more or less throttle the intake air in a simple manner.

The water / air quantity ratio can also be controlled via the nozzle 7 be done by changing the flow conditions at the annular channel 12 in a simple manner by rotating the nozzle body 8, so that thereby at the same amount of flowing water less air is entrained. However, it can also be controlled by cross-sectional control through a simple design Changing the position of the nozzle body 8, the water passage cross-section and thus the water flow rate can be changed. These configurations are in Valve construction known and therefore not shown here.

In the left half of Fig. 1, a variant is shown in which the Boundary part 2 covers a water-conducting cavity 3 and an air-conducting cavity 4. The two channels 3 and 4 are only through a bridge separated, which connects the delimitation part 2 with the pool wall 1. As with the other variant, the nozzle 7 is in a hole in the basin wall 1 is used and the pipe socket 11 attached to the limiting part 2 protrudes concentrically into the nozzle body 8. The difference is in this variant however, the pipe socket 11 via a pipe section 18 with the air-carrying Cavity 4 connected, which has an air intake valve 15, which is in the upper Pool edge 16 is present. In principle, this variant works like the other, with the nozzle body 8 being screwed further out of the basin wall 1 is to control the amount of water or air.

In Fig. 1 there is another central line 19 below the water basin indicated, which is an indication of a further possible variant of the air

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and water flow should indicate. It can namely according to the invention the air also be generated by a fan And then from this central line 19 are fed to the pipe socket 11 or to the cavity 4. This means that much larger amounts of air can be injected into the water basin than it is possible with a water jet pump principle, which is the other two variants is used. Of course, it is also conceivable that as Pump medium is air blown in under pressure and water as a pumped medium is carried away by the air jet, namely according to the Ventun principle, as it is used, for example, in liquid atomizers.

In the water basin shown in vertical longitudinal section in FIG. 2 The two cavities 3 and 4 of the second variant can be seen in the X-ray image. The two cavities, of which the lower one is filled with water, are through the web 17 separated; the upper cavity 4 is ventilated via the valve 15. Instead of this, a ventilation duct 20 which is open at the top can also be provided when the control is effected by the valves 7.

FIG. 3 shows a further variant of the assignment of the cavities 3 and 4 shown with a correspondingly differently designed nozzle 7. In this variant, between the channel delimitation part 2 and the basin wall 1 to the An intermediate wall 21 is guided into the region of the nozzle 7. The specially trained The nozzle body 22 penetrates the basin wall 1 and intermediate wall 21, so that it is carried by the basin wall 1 as in the other variants will. However, in the area of the air-guiding cavity 4 it has radial openings 23 through which air according to the Bernoulli principle (water jet pump) can be sucked in and carried away or through which air is supplied under pressure. The water is in this nozzle body 22 from the cavity 3 guided via a constriction 24 provided in the nozzle body which shapes the jet. By further screwing the nozzle body 22 into the basin wall 1, the rear distance A between the limiting part 2 and the nozzle body inlet 25 is reduced and the water passage is throttled accordingly, so that the amount of water injected is reduced. In this way it is very easy to change the amount of water in relation to the Air volume can be made. The control of the amount of water can be controlled by means of a seat part 26 fastened on the delimitation part 2 coaxially to the nozzle body and thus the water-air ratio can be refined. In each

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however, even with this variant, the nozzle body is in the length as required and can also be retrofitted after in the basin wall 1 And the Intermediate wall 21 a hole receiving the nozzle body 22 is provided became.

In Fig. 4 a further variant of the channel system according to the invention is shown, in which the basin wall 1 forms the outer boundary wall of the cavity 3. A removable plate serves as a cover part of this channel 3 27, in which the nozzles 7 are arranged, in which the pipe socket as described 11 tower. Of course, in this embodiment, the air lines can also be laid within the cavity 3. Like on the sides of the water basin A corresponding cavity with a removable cover can also be provided on the floor, as indicated in FIG. 4. Of course it is also conceivable that this * cavity is used for the air flow instead of the water flow and that the water is supplied via lines or that two channels run side by side, which individually or jointly through appropriate covers to the water basin interior are covered.

In Fig. 5 and 6 a second embodiment is also in cross section and shown in vertical longitudinal section, in which a designed according to the invention Water basin 30 is used as an insert for an immobile old basin 31. This type of modernization is typical for bathtubs where eJ.> Expansion of the old basin is too expensive and the insert basin 30 only in the old basin 31 must be used. The connections for air and water can through the openings in the old pool or through additional openings Holes can be achieved. Such insert basins can also have formations 32 to reduce the water volume in the water basin, as they are provided in so-called luxury tubs and behind which the cavities 3 or 4 can run. Basically it is such a thing Insert basin 30 constructed as described for the first embodiment.

Particularly when the invention is designed as an insert basin, the simple one In Fig. 7 shown variant intended. In this variant, the flat channels 3 and 4 are under the floor 34 of the insert basin 30 attached, which then after the installation of the insert in the old tub only one

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cause a relatively small reduction in the depth of the tub. With this one Examples are two channels 3 for the water supply and one in between Channel 4 is provided for the air supply, with the nozzles 7 from the channel 4, which are arranged over the water cavity 3, via pipe sections 34 Air can be supplied. The air duct 4 can be ventilated via a line 14 to the tub rim 35.

In FIGS. 8 and 9, a further variant of the nozzle 7 is shown in each case. at In the embodiment shown in FIG. 8, the nozzle body 37 is also arranged in the basin wall 1, the inner nozzle 38 serving to guide the air and the inlet 39 of the nozzle body protrudes into the air duct 4 which is delimited by the delimitation part 2. A radial inlet 40 is located in the nozzle body 37 provided for water, which fans out inside the nozzle body 37 so that an outer nozzle 41 is created for the water flow. At this In the variant, the pressurized air entering at 39 in the area of the inner nozzle 38 and the outer nozzle 41 causes the water in the Venturi principle carried away and injected. The radial entrance 40 is over a water line 42 connected to the interior of the tub. Of course, vice versa, the inner nozzle can also be used for the water flow, which then Air is carried away via the external nozzle in the manner of the Bernoulli principle. By twisting of the nozzle body 37, the radial inlet 40 can be separated from the water line 42 or this passage can be reduced.

In the further variant shown in FIG. 9, the nozzle body is 45 constructed similarly to the variant shown in FIG. 8. In contrast to that a number of radial channels 46 are provided and the entrances 47 are outside the boundary wall 1. About one with radial Ring 49 provided with openings 48, the water flowing around the nozzle head flows from the interior of the water basin directly to the radial channels 46 and from there to the outer nozzle 41 or the inner nozzle 38 through which air flows.

In Fig. 10, a further nozzle variant is shown in which a with a very flat head 50 trained nozzle body 51 is fixed in def pelvic armor 1 via a nut 52 and with its entrance 53 open in the Water channel 3 dives, which is limited by the boundary walls 2. In the Boundary wall 2 is coaxial with the nozzle body 51 and the air duct is

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Nender nozzle 11 attached, which with its rear entrance 54 in a Air channel 4 dives, which runs parallel to the water channel 3 and through a Wall 55 is limited. A ring 56 which can be rotated in the nozzle body 51 is arranged around the pipe socket 11, its inner bore 57 with the outer wall of the pipe socket 11 forms the outer nozzle. Because the inner guide 57 is conical, a change in the amount of water is achieved when the ring is adjusted. Of course, the outer surface of the pipe can also be used 11 be conical, whereby a change in quantity can also be achieved when adjusting the ring 56. The adjustment of the ring 56 takes place via a nozzle insert 58 which acts as a steering jet nozzle and is located within the nozzle body 51 can be easily pivoted, but can be rotated in any case. At the rear of this nozzle insert 58, pins 59 are provided which have openings 60 of the rotatable ring 56 correspond. In addition, the nozzle insert 58 is loaded by a spring 61 in the direction of flow. To twist the Ring 56, the nozzle insert 58 is displaced against the force of the spring 61, until the pins 59 engage in the openings 60. The ring 56 can then be turned by simply turning the nozzle insert.

In Fig. 11 ^st i ^{s a} l further variant shown a steerable nozzle. The rotationally symmetrical nozzle body 62 is screwed into the bore of the basin wall 1 as in the other examples. The inner nozzle 63 is arranged in this ring 62. The inner nozzle 63 has a thread on the rear, into which the pipe socket 11 is screwed, through which one of the media can be fed. The other medium is supplied through bores 65 provided in the connecting wall between nozzle body 62 and inner nozzle 63. The outer nozzle is determined by a nozzle ring 64 and by the inner nozzle 63, this nozzle ring 64 being screwed into the nozzle body 62 with a fine thread 66. The outer nozzle cross-section changes depending on the screw-in depth. The axis of the orifice bore 67 provided in the nozzle ring 64 is inclined with respect to the axis of the nozzle ring 64, so that from the mixing point 68 of the inner and outer nozzle at the water / air stream, a corresponding deflection is experienced. Due to the fine thread, a change in the jet direction can be achieved with almost no change in the cross section of the outer nozzle. The particular advantage of this nozzle lies in its flat design, which enables it to be used even with small channel depths.

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Claims (21)

G.2, St Günter Schlissler Water basin with air bubble device Expectations Water basins with air jets, especially for bathing purposes, with at least one water inlet nozzle and / or at least one air inlet nozzle, each of which is / are arranged in the direction of flow to the inside of the pool, with channels that serve to supply water and / or air, characterized in that the basin wall (1) closing the basin on the outside of the basin or on the inside of the basin at least in the vicinity of the water and / or air outlet opening (7) serves as a partial boundary wall of the water and / or air ducts (3, 4) and these ducts on the other hand at least in the vicinity of the water and / or air outlet opening (7) are delimited by boundary parts (2) and with at least one Beckenwandu-g (1) are permanently or detachably connected 2. Water basin according to claim 1, characterized in that at least one Channel (3, 4) runs on the side of the water basin facing away from the basin interior (6) and the unit is dimensioned and shaped in such a way that it can be used as an insert in an existing old basin (31). 3. Water basin according to claim 1 or 2, characterized in that at least one of the channels (3, 4) has ventilation. 4. Water basin according to any preceding claim, characterized in that that the delimiting part (s) (2) is / are arranged on the side of the basin wall (1) facing away from the inside of the basin. 5. Water basin according to any preceding claim, characterized in that that the channels (3, 4) to the outside through the inside facing the pool Side of the basin wall (1) and to the inside of the basin through a di, e Nozzle (7) receiving, serving as a limiting part, and removable cover (27) are limited (Fig. 4). - II - 6. Water basin according to any preceding claim, characterized in that that the channels by placing limiting parts (2) on the the pool interior (6) facing away from the pool wall (1) Are formed ·; "· 7. Water basin according to any preceding claim, characterized in that that dftr / the channel (s) (3, 4) runs under the pelvic floor. 8. Water basin according to any preceding claim, characterized in that that an air and a water channel (4, 3) run at least partially next to each other by a wall (17, 21) separated (i "ig. 1-3). 9. Water basin according to any preceding claim, characterized marked ·. net that the air duct (4) runs in the basin side wall above the water duct (3) and as a wall separating an air duct and a water duct The web (17) connecting the basin wall (1) and the delimitation part (2) is used. 10. Water basin according to any preceding claim, characterized in that that the ventilation (15), which is preferably provided on the pool edge (16), has a controllable cross section. 11. Water basin according to any preceding claim, characterized in that that the channels (3, 4) serve in the shape of the basin and indentations (32) provided towards the inside of the basin. 12. Water basin according to any preceding claim, characterized in that that the channels (3, 4) have at least one connection piece for an air and / or water supply line. 13. Wasserbeckan according to any preceding claim, characterized in that that as air and / or water outlet port (7) a hole in the Basin wall (1) or a hole in the Beekenboden is provided. 14 <Water basin according to a preceding claim, characterized in that ' advised 'that the air nozzle (II) and the water nozzle (7) are arranged coaxially to one another and a nozzle (8) as an outer nozzle on the one between the inside of the pool (6) and channel (3) existing wall (1) is arranged. • · · · · f · Il I t Il ····· · ··· · ιιι HI he 6.2, ϊϊΐ - 15. Water basin according to any preceding claim, characterized in that the other nozzle as an inner nozzle (11) on the channel (3) after
outside delimiting wall (2) is arranged. 16i water basin according to any preceding claim, characterized in = net that an opening in the wall (1, 27) serves as the outer nozzle. 17. Water basin according to any preceding claim, characterized in that that a nozzle body (8, 22) inserted into a bore in the wall (1, 21) and into which the inner nozzle (11) protrudes, serves as the outer nozzle. 18. Water basin according to any preceding claim, characterized in that the nozzle body is inserted into a bore in the wall (1)
and in it an Inner.düse (24) of smaller cross-section is arranged coaxially and that radial openings (23) are provided for one of the media in the annular space between the inner and outer nozzle. 19. A water basin according to any preceding claim, characterized in that around the inner nozzle (11) a through its axial position determining the passage cross-section of the outer nozzle, in the nozzle body (51) axially
adjustable ring (56) is provided. 20. Water basin according to any preceding claim, characterized in that that in the nozzle body (51) a steering jet nozzle insert (58) which forms the outlet nozzle is provided, via which the nozzle orifice comes from Ring (56) is rotatable. 21. Water basin according to any preceding claim, characterized in that the ring 4 (64) ^: ^ screwed over a thread ^ (66) »^ isi ^ or« -that
the ring (64) is threaded.