Water diverter

Abstract

Water diverter for distributing fluid within a water-bearing cleaning and / or disinfection device, comprising a housing (2) which has a housing body (3) providing a volume chamber (4) and a housing cover (5), with a fluid inlet (7) opening into the volume chamber (4) and several fluid outlets (9) provided by the housing cover (5), as well as with a distribution disc (10) arranged rotatably within the volume chamber (4) relative to the housing cover (5) and cooperating with the fluid outlets (9) of the housing cover (5), and furthermore with a drive device (11) for driving the distribution disc (10), characterized by that the distribution disc (10) is arranged to be axially displaceable within the volume space (4) relative to the housing cover (5), and that the drive device (11) has a shaft (19) on which the distribution disk (10) is arranged at its end in a rotationally fixed manner, wherein the shaft (19) is formed in two parts and has a motor-side part (20) on the one hand and a separate distributor-side part (21) on the other.

Description

[0001] The invention relates to a water diverter for distributing fluid within a water-conducting cleaning and / or disinfection device, comprising a housing which has a housing body providing a volume space and a housing cover, with a fluid inlet opening into the volume space and several fluid outlets provided by the housing cover, as well as with a distribution disc arranged within the volume space so as to be rotatable relative to the housing cover and cooperating with the fluid outlets of the housing cover, and further comprising a drive device for driving the distribution disc.

[0002] Fluid distribution devices based on a rotatable distribution disc are described, for example, in DE 10 2013 225 781 B4, GB 928 299 A, DE 86 22 665 U1 or DE 28 17 960 C2.

[0003] Water diverters as such, as well as cleaning and / or disinfection devices equipped with them, are well known in the art. Water diverters typically serve to distribute rinsing solution within a water-conducting cleaning and / or disinfection device, for example, to independently operable discharge points of a spray device.

[0004] Cleaning and / or disinfection devices of the known type have a washing container that provides a washing chamber. When used as intended, the washing chamber serves to hold the items to be cleaned. A spray device arranged within the spray container is used to apply washing solution to the items to be cleaned. According to a common embodiment, such a spray device has several rotatably arranged spray arms within the spray chamber.

[0005] A water diverter, for example, is used to supply the spray arms of the spraying system with rinse solution. Depending on the position of the water diverter, at least one of the spray arms of the spraying system is alternately supplied with rinse solution. This makes it possible to adjust the position of the water diverter to determine which spray arms of the spraying system are supplied with rinse solution and for how long.

[0006] Various water diverter designs are known from the prior art. A typical water diverter is a so-called "revolver design." This has a housing cover providing fluid outlets on the one hand, and a distribution disc arranged so as to be rotatable relative to the housing cover on the other. The distribution disc is also referred to as a "revolver disc" and provides a distribution opening. This distribution opening interacts optionally with a fluid outlet provided by the housing cover. By rotating the distribution disc relative to the housing cover, it is possible to selectively overlap the distribution opening with one of the fluid outlets of the housing cover, depending on the position of the distribution disc in relation to the housing cover. In this way, fluid is distributed selectively to one of the fluid outlets.

[0007] Although the above-described design of a water diverter has proven itself in everyday practical use, there is still room for improvement, particularly with regard to an expanded functional range. Therefore, the object of the invention is to further develop a water diverter of the type mentioned above in such a way that a broader range of applications and / or improved application possibilities are created.

[0008] To achieve this object, the invention proposes a water diverter for distributing fluid within a water-conducting cleaning and / or disinfection device having the features of claim 1.

[0009] The water diverter according to the invention therefore has a distribution disc that is not only rotatable relative to the housing cover but also axially displaceable. The distribution disc can thus be moved axially relative to the housing cover. Depending on its axial position relative to the housing cover, it either rests against it or is spaced apart from it, leaving a gap.

[0010] The axial displacement of the distribution disc offers two main advantages. The wear caused by friction during intended use can be minimized by first axially displacing the distribution disc before any rotational movement, i.e., separating it from the housing cover. Rotational movement of the distribution disc therefore only occurs when the distribution disc and the housing cover are no longer in contact with each other. This advantageously minimizes the frictional wear that is unavoidable even during intended use, which has a positive effect on the fatigue strength, tightness, and service life of the water diverter.

[0011] A further advantage of the design according to the invention is that it allows all fluid outlets to be fed simultaneously. With the distribution disc resting against the housing cover, depending on the position of the distribution disc, it is possible to selectively feed one of the fluid outlets provided by the housing cover. As a result of the axial movement of the distribution disc relative to the housing cover, a gap is formed between the distribution disc on the one hand and the housing cover on the other, which is open to the volume space of the housing. With the distribution disc in this position, all fluid outlets are fluidly coupled to the volume space at the same time, so that the fluid outlets can be fed with fluid simultaneously. The design according to the invention therefore makes it possible to distinguish between simultaneous feeding of all outlets and selective feeding of just one outlet.In contrast to the state of the art, this creates extended setting options and thus a wider range of applications.

[0012] The selective supply of only one fluid outlet occurs, for example, during a cleaning process. In this case, the fluid is pressurized with cleaning fluid. This allows the volume flow of cleaning fluid to be precisely adjusted with reference to the fluid outlet being pressurized. Simultaneous supply of all fluid outlets can be useful, for example, in a drying process when compressed air is used and all fluid outlets need to be pressurized with compressed air simultaneously.

[0013] According to a further feature of the invention, the fluid outlets are equally spaced from one another, i.e., equidistant from one another on a circle around the rotational axis of the distribution disc. For example, six such fluid outlets can be provided. The distribution disc, however, has only one distribution opening, which optionally overlaps with one of the fluid outlets depending on the rotational position of the distribution disc relative to the housing cover.

[0014] In a normal initial configuration, the distribution disc rests against the housing cover. One of the fluid outlets is aligned with the distribution opening provided by the distribution disc. The remaining fluid outlets are covered due to the distribution disc resting against the housing cover. When fluid is applied to the water diverter, the fluid pressure prevailing within the volume of the water diverter presses the distribution disc against the housing cover. This creates a sealing contact between the distribution disc and the housing cover, which, by design, ensures that fluid outflow occurs exclusively via the fluid outlet assigned to the distribution opening in this position of the distribution disc. All other fluid outlets are sealed by the pressed-on distribution disc.

[0015] According to a further feature of the invention, the drive device comprises a motor that can be operated in both clockwise and counterclockwise directions. The motor is preferably a DC motor. The design as a clockwise and counterclockwise motor offers the advantage that both a rotary movement and an axial displacement movement can be realized with a single motor.

[0016] The drive unit also features a shaft that connects the motor to the distribution disc. The distribution disc is mounted on the shaft at one end in a rotationally fixed manner.

[0017] The shaft is constructed in two parts. It has a motor-side section on the one hand and a separate distribution disc section on the other. In the final assembled state, the two shaft sections are connected to each other by a sleeve. When used as intended, power can be transmitted from the motor-side section of the shaft to the sleeve located thereon, and from there to the distribution disc section of the shaft, which carries the distribution disc in a rotationally fixed manner at the end.

[0018] The sleeve is rotatably mounted on the motor-side part of the shaft. A non-rotatable connection is provided between the sleeve and the shaft on the distributor disc side. The rotatable arrangement of the sleeve on the motor-side part of the shaft is preferably achieved by equipping the motor-side part of the shaft with an external thread at one end, which engages an internal thread provided by the sleeve.

[0019] The design described above has the advantage that, with just one motor, either a twisting movement or an axial movement of the distribution disc relative to the housing cover occurs, depending on the direction of rotation. If the distribution disc is in contact with the housing cover, a clockwise twisting movement of the motor causes the sleeve to move axially towards the motor-side part of the shaft due to its threaded engagement with the motor-side part of the shaft, resulting in axial movement of the distribution disc relative to the housing. As soon as the sleeve has moved axially to the stop, the rotary movement initiated via the motor-side part of the shaft is transferred via the sleeve to the distribution disc-side part of the shaft, resulting in a twisting movement of the distribution disc.As soon as the distribution disc is moved to its desired position, the motor's rotational movement is reversed, causing the sleeve on the motor-side part of the shaft to return axially to its initial position. Consequently, the distribution disc also moves axially until it rests against the inside of the housing cover again.

[0020] In order to achieve the desired position of the distribution disc relative to the housing cover during a rotational movement of the distribution disc, the water diverter according to a further feature of the invention has a positioning device. This positioning device interacts with the shaft, preferably with the sleeve coupling the two shaft parts. The positioning aid enables cyclical rotation, i.e., during a rotational movement, the distribution disc rotates further by such an angle that the next fluid outlet in the direction of rotation overlaps the distribution opening of the distribution disc. The distribution disc can thus be rotated further by one outlet connection with each rotational movement, ensuring a secure position.

[0021] For the purpose of securing the position, the positioning device according to a special feature of the invention has spring elements that interact with an at least partially polygonal outer contour of the sleeve. In an initial position, the spring elements rest against the surfaces of the polygonal outer contour of the sleeve. As a result of a twisting movement, the sleeve works with its polygonal outer contour against the spring force applied by the spring elements. In this way, a certain counter-torque is exerted on the sleeve. Only when this counter-torque is exceeded by the motor torque does the sleeve rotate further under compression of the spring elements. As soon as this happens, the spring elements compress and once again rest against the surfaces provided by the polygonal outer contour of the sleeve.In this way, a secure positioning of the sleeve and thus also of the distribution disc is achieved in its adjustment, which has now been rotated one step further.

[0022] To prevent further rotation by several cycles, the invention further proposes that the positioning device include a switch that switches the motor. This switch preferably interacts with one of the spring elements of the positioning device. If this spring element rebounds as a result of a rotational movement, the interacting switch is actuated, which immediately shuts off the motor. Further rotation of the sleeve beyond this cycle is thus reliably prevented.

[0023] Further features and advantages of the invention will become apparent from the following description with reference to the figures. Fig. 1 shows a schematic perspective view of a water diverter according to the invention; Fig. 2 in schematic sectional view the water switch according to Fig. 1 in a first position; Fig. 3 in schematic sectional view the water switch according to Fig. 1 in a second position; Fig. 4 in schematic sectional view the water switch according to Fig. 1 with a distribution disc in a first position; Fig. 5 in schematic perspective view the housing of the water switch according to Fig. 1 with a positioning device in the first position; Fig. 6 in schematic sectional view the water switch according to Fig. 1 with a distribution disc in a second position; Fig. 7 in schematic sectional view the water switch according to Fig. 1 with a distribution disc in a third position; Fig. 8 shows a schematic sectional view of the water switch according to Fig. 1 with a distribution disc in a fourth position; Fig. 9 in schematic perspective view the housing of the water switch according to Fig. 1 with a positioning device in the second position; Fig. 10 in a detailed view of the housing of the water switch according to Fig. 9; Fig. 11 in schematic sectional view the water switch according to Fig. 1 with a distribution disc in a fifth position; Fig. 12 in schematic perspective view the housing of the water switch according to Fig. 1 with a positioning device in the first position and Fig. 13 in schematic sectional view the water switch according to Fig. 1 with a distribution disc in a sixth position.

[0024] Fig. 1 shows a schematic perspective view of the water diverter 1 according to the invention. Sectional side views of the water diverter 1 are shown in the Fig. 2 and Fig. 3, where Fig. 2 a first position of the water switch 1 and Fig. 3 shows a second position of the water switch 1.

[0025] The water diverter 1 is designed according to the so-called "revolver" type and has a housing 2, which has a housing body 3 providing a volume space 4. The housing 2 is closed by a housing cover 5. This housing cover 5 provides a plurality of fluid outlets 9, in the embodiment shown according to Fig. 1 six such fluid outlets 9.

[0026] The water diverter 1 further comprises a distribution disc 10 arranged within the housing 2. This is arranged so as to be rotatable relative to the housing cover 5, specifically in the direction of rotation 15 around the rotation axis 28.

[0027] The distribution disc 10 provides a distribution opening 16 which, depending on the rotational position of the distribution disc 10 in relation to the housing cover 5, overlaps with one of the fluid outlets 9 provided by the housing cover 5.

[0028] The water diverter 1 opens with its fluid outlets 9 directly into a washing chamber provided by a cleaning and / or disinfection device (not shown in detail in the figures). This is achieved structurally in that the housing cover 5 is arranged within the washing chamber and is counter-locked against the housing body 3 arranged outside the washing chamber. With the interposition of a seal, the housing body 3 and the housing cover 5 accommodate the associated washing chamber wall 12 between them, wherein the housing cover 5, with a housing-side extension 13, passes through an opening formed in the washing chamber wall 12, as can be seen in particular from the sectional views according to the Fig. 2 and Fig. 3 results.

[0029] In the exemplary embodiment shown, the volume space 4 provided by the housing body 3 is fluidically connected to a first fluid inlet 7 and a second fluid inlet 8, so that fluid can flow into the volume space 4 via these connections 7 and 8.

[0030] The water diverter 1 further comprises a drive device 11. This includes, among other things, a shaft 19 that supports the distribution disc 10 at one end. The drive device 11 allows the distribution disc 10 to be rotated relative to the housing cover 5. The drive is provided by the motor 18 of the drive device 11, which is preferably a DC motor that can be operated in both clockwise and counterclockwise directions.

[0031] The distribution disc 10 is further designed to be movable relative to the housing cover 5 in the axial direction 14. This axial mobility allows the distribution disc 10 to be lifted from the housing cover 5, forming a gap 17, as is shown in the illustration, in particular according to Fig. 3 can be taken. Fig. 2 shows a position of the distribution disc 10, according to which it rests against the inside of the housing cover 5.

[0032] The water diverter 1 according to the invention operates as follows. A fluid selectively enters the volume 4 provided by the housing 2 via the fluid inlets 7 and 8. The first fluid inlet 7 can be connected to a supply line for rinsing solution, and the second fluid inlet 8 can be connected to a supply line for compressed air. When the water diverter 1 is simultaneously supplied with two input fluids, fluid mixing occurs within the volume 4.

[0033] Depending on the rotational position of the distribution disc 10 relative to the housing cover 5, fluid is discharged selectively via one of the fluid outlets 9. To supply a different fluid outlet 9 with fluid, the distribution disc 10 must be rotated relative to the housing cover 5 by such an angle that the distribution opening 16 provided by the distribution disc 10 overlaps with the corresponding fluid outlet 9. This rotational movement can be performed in a timed manner to ensure reliable positioning, as will be described in more detail below.

[0034] When the distribution disc 10 is in contact with the housing cover 5, only one of the fluid outlets 9 is supplied exclusively. The fluid pressure prevailing within the volume 4 ensures that the distribution disc 10 lies tightly against the housing cover 5, whereby the fluid is discharged exclusively via the distribution opening 16, which is in overlap with the corresponding fluid outlet 9. This is shown in Fig. 2 is shown as an example using arrow 29,

[0035] The distribution disc 10 can be moved in relation to the housing cover 5 in the axial direction 14, starting from the position according to Fig. 2 with reference to the image plane according to Fig. 3 to the left. In this axially displaced position, the distribution disc no longer rests against the housing cover 5, but rather a gap 17 is formed between the distribution disc 10 on the one hand and the housing cover 5 on the other. In this position of the distribution disc 10, all fluid outlets 9 are fluidically connected to the volume space 4 of the water diverter 1, with the consequence that all fluid outlets 9 are simultaneously supplied with fluid, as shown by the arrow 30 in Fig. 3 is marked.

[0036] A feeding of all fluid outlets 9 according to the position of the water switch 1 after Fig. 3 preferably takes place when the water switch 1 is supplied exclusively with compressed air as the fluid. A supply of only one fluid outlet 9 according to the position of the water switch according to Fig. 2 preferably takes place when either only rinsing liquor is applied or rinsing liquor and compressed air are applied for the purpose of fluid mixing.

[0037] The other Fig. 4 to 13 show in detail the structural design, in particular of the drive device 11, which, when used as intended, ensures both a rotational movement of the distribution disc 10 in the rotational direction 15 and a displacement movement of the distribution disc 10 in the axial direction 14.

[0038] As shown in particular in the presentation Fig. As can be seen in Figure 4, the shaft 19 connecting the motor 18 of the drive device 11 to the distribution disc 10 is constructed in two parts. It has a motor-side part 20 on the one hand and a distribution disc-side part 21 on the other. The distribution disc 10 is arranged in a rotationally fixed manner at the end of the distribution disc-side part 21 of the shaft 19.

[0039] The two parts 20 and 21 of the shaft 19 are coupled together by means of a common sleeve 22. The sleeve 22 is rotatably arranged on the motor-side part 20 of the shaft 19, for which purpose the motor-side part 20 of the shaft 19 has an external thread that engages with an internal thread provided by the sleeve 22. The distributor-disk-side part 21 of the shaft 19 is, however, held in a rotationally fixed manner by the sleeve 22, for example, glued therein. Fig. In the initial position shown in Figure 4, the two parts 20 and 21 of the shaft 19 are spaced apart from each other with respect to their facing end faces, the gap 31 being, for example, four millimeters.

[0040] The previously described synchronized rotation of the distribution disc 10 is carried out by means of a positioning device 24, the structure of which can be seen in particular from the schematic perspective representation according to Fig. 5 results.

[0041] The housing 2 has a flange 6 opposite the housing cover. This flange 6 provides a recess 32, which opens into three grooves 26 at the edge of the flange 6. The positioning device 24 has three spring elements 25 in the form of strip elements, with each spring element 25 being inserted into two adjacent grooves 26 at its end. This creates an approximately triangular alignment of the spring elements 25, as can be seen in particular from the illustration according to Fig. 5 results.

[0042] The spring elements 25 surround the sleeve 22. This is equipped at least in sections with a polygonal outer contour 23. As Fig. 5, in the initial situation shown, the spring elements 25 rest on the respective corresponding surfaces of the polygonal outer contour 23 of the sleeve 22, whereby the latter is fixed in its position.

[0043] A rotation or a movement of the distribution disc 10 by means of the drive device 11 takes place as follows.

[0044] The Fig. 4 and Fig. 5 shows the initial situation. The distribution disc 10 rests against the housing cover 5. In this position, the two parts 20 and 21 of the shaft 19 are at their maximum distance from each other. No current is supplied to the motor 18. In this position of the distribution disc 10, one of the fluid outlets 9 provided by the housing cover 5 is supplied with fluid.

[0045] To supply another fluid outlet 9 with fluid, the fluid supply to the water diverter 1 via the fluid inlets 7 and 8 is first interrupted. The motor 18 is then energized, specifically in clockwise rotation. As a result, the motor-side part 20 of the shaft 19 performs a rotary movement. The sleeve 22 is in threaded engagement with the motor-side part 20 of the shaft 19 and, as a result of the rotary movement, slides along the curved flat springs 25 in the axial direction 14 with respect to the plane of the drawing. Fig. 6 upwards, which leads to a lifting of the distribution disc 10 with the formation of a gap 17 between the distribution disc 10 and the housing cover 5.

[0046] The rotational movement of the motor-side part 20 leads to an axial movement of the distribution disc 10 until there is no longer a gap 31 between the motor-side part 20 and the distribution disc-side part 21 of the shaft 19, i.e. the distribution disc-side part 21 has moved to the stop against the motor-side part 20 of the shaft 19. This position of the two parts 20 and 21 of the shaft 19 is shown in Fig. 7 shown.

[0047] When the shaft parts 20 and 21 are moved to the stop, the torque from the motor 18 is transferred to the sleeve and thus also to the part 21 on the distribution disc side and the distribution disc 10 arranged at the end thereof, as shown in Fig. 8 can be seen.

[0048] However, rotation of the distribution disc 10 is initially prevented because the spring elements 25 of the positioning device 24 initially prevent rotation of the sleeve 22 due to their contact with the polygonal outer contour 23 of the sleeve 22. Only when the engine torque exceeds the counter-torque generated by the spring elements 25 does the spring elements 25 become pressed into the sleeve geometry. This is shown in the Fig. 9 and Fig. 10, wherein the solid line shows the pressed-in position with respect to the spring elements 25.

[0049] One of the flat spring elements interacts with a switch 27, as shown Fig. 10. This switch 27 is, for example, a microswitch whose switching pin is actuated when the associated spring element 25 reaches its maximum deflection.

[0050] The activation of switch 27 causes the motor 18 to be switched off immediately. At the same time, the flat springs 25 return the sleeve 22 to its aligned position through their restoring force. In this position, the distribution disc 10 is moved from its initial position to Fig. 4 is rotated by one cycle, i.e. the distribution opening 16 provided by the distribution disc is now in overlap with the fluid outlet 9 adjacent to the fluid inlet 9 of the initial position. This new position of the distribution disc 10 allows the Fig. 11 and Fig. 12 recognize.

[0051] The motor is then energized again, but not in a clockwise direction, but in a counterclockwise direction. This shows Fig. 13. As a result, the sleeve 22 moves downwards again in the axial direction 14 onto the motor-side part 20 of the shaft 19, which leads to a pressing of the distribution disc 10 against the housing cover 5. As soon as the distribution disc 10 has reached the housing cover 5, the initial position is Fig. 4 is reached again, but with the difference that the distribution disc 10 is rotated one position further in a timed manner. In the illustrated embodiment, six fluid outlets 9 are provided, whereby a timed movement causes the distribution disc 10 to rotate further by 60°.

[0052] An alternative to the previously described process implementation can be as follows. The motor 18 is initially driven in clockwise rotation. The motor shaft, i.e., the motor-side part 20 of the shaft 19, the sleeve 22, and the distribution disc 10 perform a rotary movement as soon as the required torque to overcome the counter-torque generated by the spring elements 25 is exceeded. The stop on the sleeve 22 is designed such that clockwise rotation does not result in the distribution disc 10 being pressed against the housing cover 5, but rather that a very narrow gap is maintained.

[0053] The motor 18 is then driven counterclockwise. The motor shaft 20 rotates. The distribution disc 10 and the sleeve 22 are thereby moved upward in the axial direction 14 by the coupling in the thread. The motor 18 can be driven for a specific period of time, which results from the known total stroke and the known thread pitch. The motor is driven until the total stroke is reached. To lower the distribution disc 10, the motor must be switched back to clockwise rotation.

[0054] The advantage of this process variant lies in the fact that only clockwise rotation is required to select the switching position. This allows for rapid switching between the fluid outlets, which also enables, for example, "pulse operation" with a continuously rotating distribution disc 10. In counterclockwise rotation, the distribution disc 10 lifts off, allowing lifting to be carried out independently of any twisting movement if necessary.

[0055] The water diverter according to the invention is used particularly in cleaning and / or disinfection devices in the professional sector. In such devices, the process steps of pre-cleaning, cleaning, rinsing, disinfection, and drying are carried out regularly as part of a program sequence. During the cleaning phases, i.e. the process steps pre-cleaning, cleaning, and rinsing, the items to be cleaned are subjected to rinsing fluid by the circulating pump. In order to loosen stubborn dirt, the items to be cleaned can also be subjected to pulses of compressed air after the channel has been selected, i.e. after the fluid outlet has been selected. The improved cleaning is achieved here by the pressure surge. During these cleaning phases, therefore, the fluid outlets are preferably selectively controlled, i.e. the distribution disc 10 rests against the housing cover 5.

[0056] Raising the distribution disc 10 is useful during the disinfection process step, as this allows the fluid to flow around the circular end surfaces between the distribution disc and the housing cover, which positively influences the self-cleaning of the entire system. Furthermore, pressure surges are no longer required during this process step, as the items to be cleaned are already cleaned and only a temperature transfer is necessary.

[0057] The drying process step also preferably takes place with the distribution disc raised. During the drying process, the instruments connected to the water diverter, for example narrow-bore instruments, must first be freed of residual fluid by pressure pulses. For this purpose, each instrument channel is individually selected and pressurized with compressed air. This sub-step of the drying process takes place with the distribution disc raised, meaning that the respective fluid outlets are selectively controlled. The residual drying can then be performed with the distribution disc raised, so that all instruments connected to the water diverter 1 are pressurized with compressed air simultaneously. Reference symbol 1 water diverter 2 housings 3 housing body 4 Volume space 5 Housing cover 6 Flange 7 first fluid inlet 8 second fluid inlet 9 Fluid outlet 10 distribution disc 11 Drive device 12 Sink wall 13 Extension 14 Axial direction 15 Direction of rotation 16 Distribution opening 17 gap space 18 Engine 19 Wave 20 motor-side part of the shaft 19 21 Distributor disc side part of the shaft 19 22 sleeve 23 Outer contour 24 Positioning device 25 spring element 26 grooves 27 switches 28 rotation axis 29 Arrow 30 Arrow 31 gap 32 recess

Claims

[1] Water diverter for the distribution of fluid within a water-conducting cleaning and / or disinfection device, with a housing (2) which has a housing body (3) providing a volume (4) and a housing cover (5), with a fluid inlet (7) opening into the volume (4) and several fluid outlets (9) provided by the housing cover (5), as well as with a distribution disc (10) arranged rotatably relative to the housing cover (5) within the volume (4) and cooperating with the fluid outlets (9) of the housing cover (5), and further with a drive device (11) for driving the distribution disc (10), characterized by , that the distribution disc (10) is arranged axially displaceably relative to the housing cover (5) within the volume space (4), and that the drive device (11) has a shaft (19) on which the distribution disc (10) is arranged at the end in a rotationally fixed manner, wherein the shaft (19) is formed in two parts and has a motor-side part (20) on the one hand and a separate distribution disc-side part (21) on the other hand. [2] Water switch according to claim 1, characterized by that the fluid outlets (9), in particular equally spaced from one another, are arranged on a circle around the axis of rotation (28) of the distribution disc (10). [3] Water diverter according to one of the preceding claims, characterized by that the distribution disc (10) has a distribution opening (16) which optionally overlaps with one of the fluid outlets (9) depending on the rotational position of the distribution disc (10) relative to the housing cover (5). [4] Water diverter according to one of the preceding claims, characterized by that the drive device (11) has a motor (18) which can be operated in clockwise and anti-clockwise rotation, preferably a DC motor. [5] Water diverter according to one of the preceding claims, characterized bythat the two shaft parts (20, 21) are connected to each other with a sleeve (22) arranged therebetween. [6] Water switch according to claim 5, characterized by that the sleeve (22) is arranged in a rotationally fixed manner on the part (21) of the shaft (19) on the distribution disc side. [7] Water switch according to claim 5 or 6, characterized by that the sleeve (22) is rotatably arranged on the motor-side part (20) of the shaft (19). [8] Water diverter according to one of the preceding claims 5 to 7, characterized by that the motor-side part (20) of the shaft (19) is equipped at the end with an external thread which engages in an internal thread provided by the sleeve (22). [9] Water diverter according to one of the preceding claims 5 to 8, characterized by that the sleeve (22) has at least in sections a polygonal outer contour (23). [10] Water diverter according to one of the preceding claims, characterized bya positioning device (24) for the shaft (19). [11] Water diverter according to one of claims 5 to 9 in combination with claim 10, characterized by that the positioning device (24) has spring elements (25) cooperating with the sleeve (22). [12] Water diverter according to claim 10 or 11, characterized by that the positioning device (24) has a switch (27) which switches the motor (19).

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