EP3427629A1 - Dishwasher, especially domestic dishwasher - Google Patents

Abstract

The invention relates to a dishwasher, in particular a domestic dishwasher, with a rinsing container (3) providing a rinsing chamber (4) for receiving ware to be cleaned, a spray arm (8) rotatably arranged within the rinsing container (3) for loading the ware with rinsing liquor , a collecting pot (5) into which the rinsing container (3) flows fluidly and a sieve device (12) which can be inserted into the collecting pot (5), characterized in that the sieve device (12) in the final assembled state comprises a standpipe (17) the supply of rinsing water to the spray arm (8), is penetrated, wherein the spray arm (8) end of the standpipe (17) is detachably arranged on this.

Description

The invention relates to a dishwasher, in particular in the embodiment of a domestic dishwasher, with a washing compartment providing a washing compartment, which serves to receive items to be cleaned, a rotatable within the Spülbehälters arranged spray arm for acting on the items to be washed with rinsing liquor, a collecting pot into which the washing fluidly opens and a usable in the collecting pot screening device.

Dishwashers of the type mentioned are well known from the prior art, which is why it does not require a separate documentary evidence at this point.

Dishwashers of the generic type have a washing container, which provides a washing compartment. This washing compartment is accessible on the user side via a charging opening which can be closed in a fluid-tight manner by means of a pivotally mounted flushing door. In the intended use case, the washing container serves to receive items to be cleaned, which in the case of a domestic dishwasher may be, in particular, dishes, cutlery pieces and / or the like.

For loading of items to be cleaned with rinse liquor, the dishwasher has a scavenging chamber side formed spray. This spraying device generally provides rotatably mounted spray arms, with typically two or three such spray arms being provided. In the intended use case, a loading of the items to be cleaned with rinse liquor by means of rotating spray arms. In order to supply the spray arms with rinsing liquor, a circulating pump is provided, which is fluidly connected on the one hand to the collecting pot and on the other hand to the spray arms.

When used as intended, the rinsing water discharged by the sprayer collects in the collecting pot, into which the rinsing container flows fluidly. In circulation, the circulating pump promotes itself in the collecting pot accumulating rinse liquor to the spray arms of the spray, from where then takes place a delivery of the rinse liquor to be cleaned items.

In terms of fluid technology, the collecting pot, into which the rinsing container discharges, is separated from the spray chamber provided by the rinsing container by a screening device. The rinsing liquor circulated in the intended use case by the circulating pump therefore accumulates in the collecting pot only after passing through the screening device inserted into the collecting pot. Leftovers, dirt particles and / or similar impurities are retained by the sieve device, so that it comes to circulation of a so far purified by screening rinsing liquor. Such a screening device typically comprises a coarse screen, a fine screen and a flat screen.

The contaminants retained by the screen must be manually removed by the user after completing a wash program and then discarded. Incidentally, it may happen over time that the pores of the screening device become clogged, so that user-side manual cleaning of the screening device is required. For this purpose, the screening device is the collector pot on the user side to remove and clean, for example, in a sink under running water. To facilitate such cleaning of the screening device, it is known from the prior art to make the screening device removable, which makes it possible to separate the individual screens of the screening device from each other for the purpose of simplified cleaning.

Although previously known screening devices have proven themselves in everyday practical use, there is a need for improvement, in particular with regard to their cleaning in the event of contamination. Because it is the sometimes very expensive removal of the screening device from the collecting pot of the dishwasher on the user side perceived as disadvantageous. Thus, the screening device whether the scavenging chamber side provided spraying device is not always readily accessible, for example, when a spray arm obstructs the user-side access to the screening device as a result of his occupied after completion of the final wash program end position. In this case, the spray arm for unimpeded access to the screen device on the user side is first to twist. In addition, the screen device is due to design by a user only uncomfortable to reach, since it is located in the collecting pot, that is located in the region of the bottom part of the washing.

It is therefore based on the above-described object of the invention to further develop a dishwasher of the type mentioned in that a simplified handling of the screening device is allowed, in particular for cleaning purposes.

To solve this problem, the invention proposes a dishwasher with the features of claim 1.

The dishwashing machine according to the invention has a rinsing container providing a rinsing compartment which serves to receive items to be cleaned, a spray arm rotatable within the rinsing container for loading the items to be rinsed with rinsing liquor, a collecting pot into which the rinsing container flows in fluid communication, and a screening device which can be inserted into the collecting pot on.

When used as intended, the spray arm is fluidically connected to a device-side standpipe, so that circulated wash liquor can get under aerodynamic interposition of the standpipe to the spray arm. It is provided according to the invention that the spray arm end of the standpipe is detachably arranged on this. If necessary, the spray arm can therefore be detached from the standpipe so that the spray arm can be removed from the standpipe.

In the final assembled state, the screening device is sandwiched between the collecting pot, that is its bottom and the end of the standpipe arranged spray arm. In the user-side removal case of the spray arm to be detached from the standpipe, allowing unhindered access and unimpeded removal of the screening device.

The embodiment according to the invention thus makes it possible to remove not only the screening device but, if required, also the spray arm. This not only allows a cleaning of the spray, but also a cleaning of the spray arm. It is also structurally advantageous that the spray is independent of position in each case easy to reach the user side and therefore to solve the standpipe. Once this is done, not only the spray arm in a simple manner, but also in the installed state underlying sieve device can be easily removed on the user side. The embodiment of the invention therefore also allows a user-side easy removal of a screening device to be cleaned.

The re-insertion of the screening device is also possible in a simple manner, because this is only in the intended manner in the collecting pot bring. Then the spray arm is put on the end side of the standpipe on this, wherein with an arrangement of the spray arm on the standpipe and the screening device is fixed in position. Because in the final assembled state, the screening device between the end of the standpipe arranged spray arm on the one hand and the bottom of the collecting pot on which rests the screening device, on the other hand clamped.

The screening device proposed by the invention is rotationally symmetrical according to a preferred embodiment. In particular, the screening device in the final assembled state is preferably centered on the standpipe which serves to supply rinsing liquor to the spray arm. The sieves of the screening device are therefore preferably formed around a common central axis. This central axis coincides with the device-side standpipe, which passes through the center of the rotationally symmetrical screening device in the final assembled state. A rotationally symmetrical screening device allows a uniformly distributed inflow of circulated rinsing liquor in the collecting pot, so that takes place in the event of contamination equal pollution of the screening device. The rotationally symmetrical arrangement also has the advantage that the clamping force acting on the sieve device in the final assembled state is equally distributed over the sieve device, so that a permanently secure positional positioning of the sieve device is ensured. In particular, scouring effects can be avoided, as may possibly occur with regard to the screens of previously known screening devices.

For releasable arrangement of the spray arm on the standpipe is used according to a further feature of the invention, a locking element, which may be formed for example as a union nut. In this case, the standpipe and the union nut preferably cooperate via a bayonet closure, which is why the union nut has a part corresponding to the configuration of serving as an abutment for the spray arm standpipe part of a bayonet closure.

The locking element, which is designed in particular as a union nut, serves as a central actuator to the user side with just a handle to solve the spray arm intended from the standpipe. Consequently, the construction according to the invention makes it possible to remove the spray arm and screening device in a simple manner after a single actuation of the locking element and then to be able to clean it. The locking element serves insofar as a means to ensure the same position and spray arm screen device. In particular, a common locking and / or unlocking of spray arm and screen device can be effected by actuation of the locking element.

The union nut acts in the intended use case together with the standpipe. For this purpose, the standpipe on a union nut side section, which is an opposite to the bayonet lock part of the nut. In the assembled state, these two parts form the bayonet closure designed for position-safe arrangement of the union nut on the standpipe.

It is preferably provided that the union nut has a siebo direction side open edge channel. In this edge channel, the screening device engages in the final assembled state. It is thus not only a clamping of the screening device between the bottom of the collecting pot and spray arm achieved in the direction of the central axis of the screening device, it is also achieved a position assurance in a direction transverse to the central axis direction. Because by the positive engagement of the screening device in the edge channel of the union nut, the screening device is fixed in position in relation to the union nut and thus also in relation to the stationary standpipe.

The clamping of the screening device between the spray arm and the bottom of the collecting pot is vorgzuterweise under elastic deformation of the screening device. This elastic deformation of the screening device ensures that the screen device presses in the final assembled state in the height direction of the central axis from below against the fixed position on the standpipe nut. The trained between union nut and standpipe bayonet is so loaded, which counteracts unintentional loosening of the bayonet closure by, for example, vibration phenomena.

The sieve device has a coarse sieve, a fine sieve and a surface sieve, which are designed to be removable from one another, wherein they are preferably arranged concentrically in the final assembled state. It is such a central orientation of all sieves the screening device ensures the center axis of the screening device. According to a further feature of the invention it is provided that the coarse filter interacts with the union nut. For this purpose, the coarse filter is equipped with a union nut side edge formed, which engages positively in the final assembled state in the provided by the nut edge channel. In this case, the peripheral edge of the coarse sieve and the peripheral channel of the union nut are coordinated in their geometric dimensions corresponding to one another such that a relative movement transversely to the center axis of the screening device is effectively prevented.

According to a further feature of the invention, the union nut and the coarse filter carry mutually corresponding position markings. These serve to be able to visually visually check in a simple manner on the user side, whether the union nut is properly aligned relative to the coarse sieve with respect to its angle of rotation, it is thus properly arranged on the standpipe, so there is a properly secured arrangement of the spray arm. For this purpose, the union nut preferably has at least one passage opening or a transparent section through which a position marking carried by the coarse sieve is visible, at least in the case of proper alignment, in particular rotation of the union nut relative to the coarse sieve. In this case, the position mark carried by the union nut can be formed by the passage opening or the transparent portion itself. With proper alignment or rotation of the nut relative to the coarse sieve carried by the coarse filter position marker is positioned centrally within the provided by the union nut through hole or the transparent portion. Preferably, however, the coarse screen may additionally have a separate position mark to more accurately identify the center of the through hole or transparent portion. This allows an even better comparison of the relative positioning of the union nut and coarse sieve. In this embodiment, the provision of a position marker on the flat screen is unnecessary.

The invention further proposes a spraying device for a dishwasher, in particular for a dishwasher of the type described above, with a spray arm which is rotatably arranged in the final assembled state and with a means for releasably arranging the spray arm on a machine-side abutment.

The spraying device according to the invention thus provides at least one spray arm, which is both rotatable and detachable. For this purpose, a means is provided according to the invention that serves the releasable arrangement of the spray arm on the associated abutment of the dishwasher. The detachable arrangement of the spray arm has the advantage of being able to remove the spray arm if necessary. For example, such a removal is desired on the user side in order to be able to clean the spray arm independently of the execution of a rinsing program. The detachable arrangement thus allows a user, if necessary, to detach the spray arm from the machine-side abutment and remove it from the dishwasher. It can then be done outside the dishwasher, a cleaning of the spray arm, for example, in a sink under running water. After cleaning, the spray arm can be re-introduced into the dishwasher by being arranged as intended on the machine-side abutment.

As a means for releasable arrangement of the spray arm on a machine-side abutment preferably a union nut is used. This is preferably arranged captive on the spray arm and has a connection contour which is formed corresponding to a mating contour of the abutment. Preferably, a bayonet fitting is used as the connection contour, because this allows a user-side particularly simple handling for mounting or dismounting of the spray arm.

The invention further proposes a screening system for a dishwasher, in particular for a dishwasher of the type described above, with a sieve device at least partially accommodated in the final assembled state by a collecting pot of the dishwasher, and a spray arm of a spraying device rotatably arranged in the final assembled state and detachably mounted on a machine-side abutment. wherein the screening device is formed about a central axis, wherein the center axis of the screening device and the axis of rotation of the spray arm coincide.

The screening system proposed by the invention has a screening device on the one hand and a spray arm on the other hand. The spray arm is rotatably arranged, namely about an axis of rotation. The sieve device in turn has a central axis, wherein according to the invention it is provided that the central axis and the axis of rotation coincide. When used as intended, the spray arm therefore rotates about the center axis of the screening device.

The embodiment of the invention provides a symmetrical arrangement, namely a rotationally symmetrical arrangement of screening and spray arm. The spray arm is arranged detachably in an already described manner on an abutment of the dishwasher, so that it is particularly simple after removing the spray arm due to the rotationally symmetrical configuration on the user side to be able to remove the spray arm and sieve device to the washing compartment of the dishwasher.

In this case, the screening device has concentrically arranged screens, which also simplifies the operation of the screening device, in particular in the case of removal.

The sieves of the screening device are also formed according to a further feature of the invention in cross section in each case circular. This also serves the simplified handling.

Overall, it allows the above-described construction, the spray arm and the screening device by means of only one actuating or locking element, in particular the union nut to be able to fix the position or dissolve a positional fixation for the purpose of removal. This provides, in contrast to the prior art, a significantly improved and simplified in the implementation handling.

Fig. 1

in rein schematischer Seitendarstellung eine Geschirrspülmaschine der erfindungsgemäßen Art;

Fig. 2

in schematisch perspektivischer Darstellung einen Spülbehälter der erfindungsgemäßen Geschirrspülmachine;

Fig. 3

in einer schematischen Detailansicht den unteren Sprüharm einer Sprüheinrichtung der erfindungsgemäßen Geschirrspülmaschine;

Fig. 4

in teilgeschnittener Seitenansicht die Sprüharmanordnung nach Figur 3;

Fig. 5

in schematisch perspektivischer Darstellung den unteren Sprüharm der erfindungsgemäßen Geschirrspülmaschine in einer ersten Stellung;

Fig. 6

in schematisch perspektivischer Darstellung den unteren Sprüharm der erfindungsgemäßen Geschirrspülmaschine in einer zweiten Stellung;

Fig. 7

in schematisch perspektivischer Darstellung ein demontierter unterer Sprüharm;

Fig. 8

in schematischer Perspektivdarstellung eine demontierte Siebeinrichtung;

Fig. 9

in einer Detailansicht den unteren Sprüharm nach Figur 7;

Fig. 10

in einer schematischen Detailansicht den unteren Sprüharm einer Sprüheinrichtung eines weiteren Ausführungsbeispiels der erfindungsgemäßen Geschirrspülmaschine bei unverschlossener Stellung der Überwurfmutter;

Fig. 11

in einer schematischen Detailansicht den unteren Sprüharm einer Sprüheinrichtung des Ausführungsbeispiels von Fig. 11 in verschlossener Stellung der Überwurfmutter und

Fig. 12

in einer schematischen Detailansicht die Siebeinrichtung von Fig. 10 und 11 bei abmontiertem Sprüharm.

Further features and advantages of the invention will become apparent from the following description with reference to FIGS. Show

Fig. 1

in a purely schematic side view of a dishwasher of the type according to the invention;

Fig. 2

in a schematic perspective view of a washing container of the dishwashing machine according to the invention;

Fig. 3

in a schematic detail view of the lower spray arm of a Spraying device of the dishwasher according to the invention;

Fig. 4

in a partially sectioned side view of the Sprüharmanordnung FIG. 3 ;

Fig. 5

in a schematic perspective view of the lower spray arm of the dishwasher according to the invention in a first position;

Fig. 6

in a schematic perspective view of the lower spray arm of the dishwasher according to the invention in a second position;

Fig. 7

in a schematic perspective view of a dismantled lower spray arm;

Fig. 8

in a schematic perspective view of a disassembled screening device;

Fig. 9

in a detailed view of the lower spray arm FIG. 7 ;

Fig. 10

in a schematic detail view of the lower spray arm of a spraying device of another embodiment of the dishwasher according to the invention in the unlocked position of the nut;

Fig. 11

in a schematic detail view of the lower spray arm of a spray device of the embodiment of Fig. 11 in the closed position of the union nut and

Fig. 12

in a schematic detail view of the screening device of 10 and 11 with the spray arm removed.

FIG. 1 can be seen in a purely schematic representation of a dishwasher 1 in the embodiment of a program-controlled household dishwasher.

The dishwasher 1 has, in a manner known per se, a housing 2 which accommodates a washing container 3. The washing container 3 in turn provides a washing compartment 4 for receiving items to be cleaned. To feed the washing compartment 4 with too This charging opening 9 is closed fluid-tight by means of a Spülraumtür 10, the Spülraumtür 10 is rotatably mounted about a horizontal pivot axis extending horizontally.

When used as intended, the dishes to be cleaned are treated with rinsing liquor, for which purpose the dishwasher 1 has a spraying device 6. In the exemplary embodiment shown, the spray device 6 includes an upper spray arm 7 and a lower spray arm 8.

The spraying device 6 is fluidly connected to a circulating pump, not shown in the figures, of the dishwasher 1, by means of which the spraying arms 7 and 8 of the spraying device 6 are supplied with washing liquor.

The washing compartment 3, which provides the washing compartment 4, opens with respect to the plane of the drawing FIG. 1 on the underside in a collecting pot 5 a. At this collecting pot 5, the circulating pump not shown in the figures is connected. Fluidtechnisch is the collecting pot 5 from the washing chamber 4 of the washing container 3 by a in FIG. 1 Screening device 12 not shown separately. The rinsing liquor circulated in the intended use case by the circulating pump collects after being drained from the items to be washed and after passing through the screening unit 12 in the collecting pot 5. From there it passes in the circulation operation in the manner already described to the spray arms 7 and 8 of the sprayer. 6

The screening device 12 is, as in particular a synopsis of Figures 2 and 8th can recognize, rotationally symmetrical. In this case, the screening device 12 has an area sieve 14, a coarse sieve 15 and a fine sieve 16, which are each aligned coaxially to a common central axis 24.

For a fluidic connection of the lower Sprüharms 8 to the provided by the circulation pump with rinsing circulation circuit is a stationary standpipe 17, to which the spray arm 8 is connected in the final assembled state end, as can be seen in particular from the illustration FIG. 4 results.

According to the invention it is provided that in the final assembled state fluidically connected to the lower spray arm 8 standpipe 17, the screening device 12 passes through the center. The central axis of the standpipe 17 and the central axis 24 of the screening device 12 thus coincide. As a result, so also fall the axis of rotation around which rotates in the intended use of the lower spray arm 8 and the central axis 24 of the screening device 12 together. The lower spray arm 8 thus rotates about the central axis 24 of the sieve device 12. According to the invention is further provided that the spray arm end of the standpipe 17 is detachably arranged on this. This makes it possible to separate the spray arm 8, if necessary, from the standpipe 17 and remove the dishwasher 1 can. Once the spray arm 8 is released from the standpipe 17, the screening device 12 can be removed from the collecting pot 5 in a simple manner that the screening device 12 is lifted in the height direction of its central axis 24 upwards from the collecting pot 5, as shown in the illustration FIG. 8 lets recognize.

For releasable arrangement of the spray arm 8 on the stand pipe 17 is a union nut 13. In the final assembled state, the union nut 13 is fixed in position relative to the standpipe 17. It is provided for this purpose a bayonet closure, wherein corresponding cams 18 are provided by an upper portion 22 of the standpipe 17. A shoulder 19 of the union nut 13 on the inside, that is, the standpipe 17 facing a corresponding mating contour available, which mesh in the final assembled state, as shown in the illustration FIG. 4 lets recognize.

The union nut 13 further has a cylindrically shaped portion in the form of a tubular extension 23, which abuts the outer circumference of the standpipe 17 in the final assembled state. It is achieved as a tilt-safe arrangement of the union nut 13 on the standpipe 17.

As FIG. 4 Furthermore, the union nut has a circumferential edge channel 21 on the stabbing direction side. In the edge-mounted state 21, a marginal edge 20 of the coarse sieve 15 of the sieve device 12 provided in the final assembled state interlocks in a form-fitting manner. By this positive engagement it is ensured that the screening device 12 is fixed in the final assembled state by means of the union nut 13, so that a relative movement of the screening device 12 is prevented to the standpipe 17 in a direction transverse to the central axis 24 direction.

As is apparent from the above construction description, the screening device 12 is clamped in the final assembled state between the bottom of the collecting pot 15 and the fixed relative to the standpipe 17 union nut 13. With a loosening of this union nut 13, the connection between the union nut and standpipe 17 is dissolved, which on the one hand makes it possible to remove the spray arm 8 as well as the screening device 12 the washing chamber 4. This unlocking and locking of screening device 12 and spray arm 8 with only a single control is possible. This simplifies the user-side unlocking and locking process and also makes it easier to be able to remove the screening device 12 and the spray arm 8 of the dishwasher for example, a manual cleaning.

As can be seen for example FIG. 8 furthermore, the collecting pot 15 is aligned centrally to the bottom part 11 of the washing container 3. Consequently, there is a rotationally symmetrical alignment of collecting pot, standpipe 17, screening device 12 and spray arm 8, wherein the rotational symmetry around the central axis 24 results.

FIGS. 10 and 11 show in a schematic detail view of the lower spray arm 8 of a spraying device of another embodiment of the dishwasher according to the invention. The design and arrangement of the standpipe 17, the Grobsiebs 15 and the union nut 13 largely corresponds to the embodiments described above, in particular the description of the FIGS. 4 . 7 . 8th and 9 , In the following, therefore, only the existing differences of the further embodiment are shown. In this case, the union nut 13 and the coarse filter 15 carry mutually corresponding position markings 34, 35. These are used to visually easily visually check the user side, whether the union nut 13 is properly aligned with respect to their angle of rotation relative to the coarse filter 15, they thus properly on the standpipe 17 is arranged, so there is a properly secured thereto arrangement of Sprüharms 8. The union nut 13 has a passage opening 36 through which a coarse screen 15 carried by the position marker 35 is visible, at least when the nut is so far relative to the coarse filter 15 is rotated that their closed position, ie their proper alignment and thus the for the operation of the Dishwasher proper alignment of the spray arm 8 is reached. Fig. 10 shows the still unlocked position while Fig. 11 the Closing position shows. In the latter, one recognizes the position marking 35 provided by the coarse screen 15, which is uncovered due to the passage opening 36. The position marking 35 is formed as an inwardly directed web extending from the marginal edge 20 of the coarse sieve 15, which web can taper approximately triangularly or inwardly. In contrast, the union nut 13, a position marker 34, here in the form of a symbol, such as a stylized door lock, which is to signal the user the closure position ready. If the position marker 35, in particular the tip of the bridge, points precisely to the symbol of the position marker 34, the user recognizes the presence of the closure position in a simple and intuitive manner. It is also possible in a simplified version of this embodiment that the passage opening 36 itself used as provided by the union nut position marking, so is also dispensed with the symbol shown here. In this case, a closing position would be achieved when the position marker 35, ie the tip of the web, is positioned centrally within the through hole 36.

Fig. 12 shows a schematic detail view of the arranged in the washing compartment screen 12 of 10 and 11 , where spray arm with union nut is removed. Thus, one obtains a perspective view of the standpipe 17 and the screening device 12, in particular the coarse screen 15 and its upwardly final edge 20. This serves, as in connection with Fig. 4 shown on the peripheral edge are formed at three locations position marks 35, each in the form of an outgoing from the edge 20 of the coarse wire 15, inwardly directed web.

reference numeral

1 dishwasher 18 cam 2 casing 19 shoulder 3 rinse tank 20 edge 4 Wash cabinet 21 edge channel 5 collecting pot 22 section 6 spraying 23 Tubular extension 7 upper spray arm 24 central axis 8th lower spray arm 34 location marker 9 loading port 35 location marker 10 rinsing chamber 36 Through opening 11 the bottom part 12 screening 13 Nut 14 flat filter 15 coarse screen 16 fine screen 17 standpipe

Claims (13)

Dishwasher, in particular domestic dishwasher, with a rinsing container (3) providing a washing compartment (3) for receiving items to be cleaned, a spray arm (8) arranged rotatably within the washing container (3) for loading the items to be washed with rinsing liquor, 5), into which the rinsing container (3) flows fluidly and a collecting device (5) usable sieve device (12), characterized in that the sieve device (12) in the final assembled state of a standpipe (17), the supply of rinsing water to the spray arm (8), is penetrated, wherein the spray arm (8) end of the standpipe (17) is detachably arranged on this. Dishwasher according to claim 1, characterized by a locking element (13) for the detachable arrangement of the spray arm (8) on the standpipe (17), wherein by actuating the locking element (13) a common locking and / or unlocking of spray arm (8) and screening device (12 ) is feasible. Dishwasher according to claim 1 or 2, characterized in that the locking element is designed as a union nut (13), wherein the union nut (13) has a corresponding to the embodiment of the abutment for the spray arm (8) serving standpipe (17) formed part of a bayonet closure , Dishwasher according to claim 3, characterized in that the union nut (13) has a siebeinrichtungsseitig open edge channel (21) into which engages the screen assembly (12) in the final assembled state. Dishwasher according to one of the preceding claims, characterized in that the screening device (12) from each other dismantling a Grobsieb (15), a fine sieve (16) and a surface sieve (14), which are preferably arranged concentrically in the final assembled state. Dishwasher according to one of the preceding claims 2 to 5, characterized in that a coarse screen (15) interacts with the locking element, in particular the union nut (13). Dishwasher according to one of claims 2 to 6, characterized in that the locking element, in particular the union nut (13), and the coarse filter (15) mutually corresponding position markings (34, 35) wear. Spraying device for a dishwasher, in particular for a dishwasher according to one of the preceding claims 1 to 7, with a spray arm (8) arranged rotatably in the final assembled state, characterized by a means for detachable arrangement on a machine-side abutment. Spraying device according to claim 8, characterized in that the means is a cooperating with the abutment union nut (13). Spraying device according to claim 9, characterized in that the union nut (13) provides a corresponding formed to the embodiment of the abutment part of a bayonet closure. Sieve system for a dishwasher, in particular for a dishwasher, in particular for a dishwasher according to one of the preceding claims 1 to 7, with a in the final assembled state of a collecting pot (5) of the dishwasher (1) at least partially recorded screening device (12) and a final assembled State releasably arranged on a sprayer arm (8) of a spraying device (6) arranged rotatably on a machine-side abutment, wherein the sieve device (12) is formed around a center axis (24), the central axis (24) of the sieve device (12) and the axis of rotation of the spray arm ( 8) coincide. Sieve system according to claim 11, characterized in that the screening device (12) concentrically arranged sieves (14, 15, 16). Sieve system according to claim 12, characterized in that the sieves (14, 15, 16) are each formed in cross-section circular.

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