EP3020317A1 - Dishwasher - Google Patents

Abstract

The invention relates to a dishwasher having a rinsing room providing a rinsing container and a spraying device for applying to be washed items with rinsing liquid, wherein the spray device has a rotatably mounted spray unit (4), which has through openings (6) for the passage of the rinsing liquid, wherein the Spray unit (4) disc-shaped and within a housing (8) is arranged vertically movable, wherein the housing (8) provides an interacting with the spray unit in the height direction abutment (12).

Description

The invention relates to a dishwasher with a rinsing container providing a rinsing container and a spraying device for loading of items to be cleaned with rinsing liquid, wherein the spray device has a rotatably mounted rinsing unit which has through openings for the passage of the rinsing liquid.

Dishwashers of the type mentioned above are well known in the art. They serve the cleaning of items to be cleaned and for this purpose have a rinsing container which provides a rinsing space which receives rinsing items to be cleaned in the intended use case.

For loading the washing compartment with items to be washed, which may be, for example, dishes and / or cutlery, the washing container provides a charging opening. This can be closed in a fluid-tight manner by means of a flushing door, which flushing door is preferably pivotably mounted about a horizontally extending pivot axis.

For a loading of items to be cleaned with rinsing liquid, also called rinsing liquor, is a spray, which usually has a plurality within the rinsing container rotatably arranged spray units, for example in the embodiment as spray arms. The spray units, in turn, provide passage openings through which, in the intended use case, rinsing fluid is discharged under pressure into the washing compartment.

A dishwasher of the generic type is for example from the DE 10 2012 202 246 A1 known. A disadvantage of the previously known construction is that due to the ease of storage to be provided gap and the associated leakage leads to Spülflüssigkeitsdruckverlusten.

The object of the invention is therefore to propose a dishwashing machine with a spray unit, which on the one hand has location-variable passage openings, on the other hand, but only comparatively minor leaks.

To solve this problem, the invention proposes a dishwasher of the type mentioned above, which is characterized in that the spray unit disc-shaped, in particular annular, and arranged vertically movable within a housing, wherein the housing provides an interacting with the spray unit in the height direction abutment.

The spray unit provided according to the invention is disk-shaped. It is not only rotatable within a housing, but also arranged höhenverfahrbar. It is therefore possible a movement of the spray unit in the height direction relative to the housing.

The housing provides an abutment cooperating with the spray unit, namely an abutment cooperating in the height direction with the spray unit. The possibility of movement of the spray unit relative to the housing is therefore limited in the vertical direction by the housing's own abutment.

In the intended use case flushing fluid flows into the housing housing the spray unit and from there on through the passage openings into the washing compartment. The application of the housing receiving the spray unit with rinsing fluid causes the spray unit to be twisted on the one hand and, on the other hand, to move to the abutment of the housing serving as a stop after the formation of a certain pressure in the vertical direction. As a consequence, the rotational movement results in a location-variable orientation of the passage openings provided by the spray unit and, due to the movement of movement, a comparatively dense application of the spray unit to the housing deflection bearing. Advantageously, a spray unit is thereby created which has comparatively small leaks while at the same time providing position-variable passage openings, with which the pump-generated flushing fluid pressure can be utilized in an optimized manner for washing dishes.

The spray unit according to the invention is preferably used as an additional spray unit for spray arms known from the prior art, whereby an intensive rinsing zone is created. In this case, the inventive Spray unit either on a wall of the washing, so be arranged on a bottom, ceiling or side wall, or on a user out of the washing container herauslernfahrbaren Spülgutaufnahme.

For a further reduction of the leak, it is provided according to a further feature of the invention that a sealing element is arranged between abutment and spray unit. At this sealing element, the spray unit sets in the case of loading, so that a most extensive sealing of the spray unit is given to the abutment so that it does not come to an undesirable pressure loss within the flushing liquid due to leaks in an advantageous manner. According to an alternative embodiment, however, can also be dispensed with a sealing element and instead the spray unit and / or the abutment, but preferably the spray unit of a sealing material, in particular made of silicone, be prepared so that the spray unit applies directly to the abutment in the loading case in such a way that as far as possible a sealing of the spray unit with respect to the abutment is provided. In any case, it is achieved that the rinsing liquid exits the housing exclusively or almost exclusively from the openings provided therefor of the spray unit, unwanted leaks, however, are avoided, and thus the exiting spray jets have a high spray pressure.

It is provided according to a further feature of the invention that the spray unit is formed annular disc-shaped. It is thus ensured an optimized pressure load of the spray unit in the use case, which ensures a comparatively close concern of the spray unit on the housing-side abutment. In addition, the spray shadow with respect to other spray units is small.

The housing provides according to a further feature of the invention, a trained below the spray unit storage space for rinsing liquid. This storage space is fluidly connected to a connecting pipe and is charged in the intended use with rinsing liquid. The rinsing liquid entering the storage space is distributed evenly within the storage space, with the increasing pressure of rinsing liquid increasing the pressure within the storage space. When a geometriebedingten pressure value is exceeded, it comes to a raising of the spray unit in the height direction and thus conditional to a pressing the Spray unit to the housing-side abutment or to the arranged between abutment and spray unit sealing element.

The spray unit has according to a further feature of the invention on its rear side facing the storage space in the storage space projecting vanes. In the case of a loading of the storage space with rinsing liquid, these guide vanes are acted upon tangentially by the rinsing liquid, which leads to the rotational movement of the spray unit. Once then adjusts a certain back pressure within the storage space then in the already described above, the spray unit moves in the vertical direction upwards until it rests against the abutment of the housing. A further rotational movement of the spray unit does not take place in this position due to the concern of the spray unit on the abutment. By repeated switching on and off of the pumping the flushing liquid pump, a renewed twisting and re-setting of the spray unit can be achieved on the abutment. This provides, with simultaneous tightness of the entire spray unit, good coverage of the spray jets emitted through the passage openings of the spray unit to be cleaned.

In the intended use case takes place as a result of the introduction of rinsing liquid in the storage space of the housing instead of a rotational movement of the spray instead, for example by a few degrees. As soon as the rinsing liquid pressure within the storage space exceeds a certain limit value, the spray unit moves upward in the vertical direction and presses against the housing-side abutment. The twisting movement of the spray unit is stopped as a result of this pressure on the housing-side abutment. When the spray unit is still in the undeployed position, a rinsing fluid is dispensed via the passage openings provided by the spray unit. If now the rinsing liquid supply is stopped, for example by switching off the feed pump, the pressure within the storage space drops, as a result of which the spray unit of the weight series of forces moves backwards and thereby releases itself from the abutment. In a renewed application of rinsing liquid, a new cycle of the type described above, so that the spray unit again rotated by a few degrees until it rülflüssigkeitsdruckbedingt re-applies to the abutment.

The spray unit is arranged according to a further feature of the invention in the region of a bottom, top and / or side wall of the washing compartment. It is created as a defined rinse zone within the washing. This can be the user side be used by a targeted placement of a retracted into the washing container Spülgutaufnahme with to be cleaned items to be washed.

As an alternative to the above-described embodiment, provision may also be made for the spray unit to be arranged on a washware receptacle which can be moved out of the washing container, for example a washing basket. This embodiment makes it possible to position the items to be cleaned on the user side in the exact position within the washware receptacle in such a way that a desired loading of the washware to be cleaned by the spray unit takes place.

It is provided according to a further feature of the invention that a flushing liquid channel is connected to the storage space of the housing. This rinsing fluid channel feeds with rinsing fluid from the storage space provided by the housing. Preferably, the rinsing liquid channel is connected on one end and on the other end to the storage space of the housing, so that rinsing liquid flowing from the storage space into the rinsing liquid channel reaches the storage space after flowing through the rinsing liquid channel.

The rinsing liquid channel has according to a further feature of the invention via passage openings for the passage of the rinsing liquid. According to this embodiment, therefore, not only a rinsing liquid discharge takes place via the passage openings provided by the spray unit, but also by those provided by the rinsing fluid channel. The effective range of the spray unit is increased in this way.

It is provided according to a further feature of the invention that the spraying device in the embodiment of a spray arm has a further spray unit. The spray unit according to the invention is therefore used in combination with spray arms known per se from the prior art and insofar acts as an additional spray unit, which is preferably used for the intensive treatment of items to be cleaned. This also Spülgutverschmutzungen can be removed without residue, which can not or only inadequately removed in a sole use of previously known from the prior art spray arms.

The inventive design is characterized by a total of a movable mounted nozzle ring on the bottom has blades that are acted upon tangentially by the rinsing liquid and this set when turning on and off the pump in rotation. The upper holder of the nozzle ring is also formed as a seal and prevents after a start of the Spülflüssigkeitsförderpumpe by the pressure build-up and the pressing of the annulus to the sealing element a continuous rotational movement and leakage losses. Thus, when the pump is turned on and off, the annulus, including the passages provided therefrom, is rotated a few degrees, thereby providing improved washware coverage. An optimized further rotation of the circular ring in conjunction with an acceptable pressure loss due to the constriction of the inflow region results in the case of a blade size of approximately 20 to 40% of the channel cross section.

With the embodiment according to the invention on the one hand small leaks are ensured. On the other hand, ensures a very good coverage of the spray to the dishes by repeatedly turning on and off the pump. In this case, the ratio of switching the pump on / off to the respective supply time can be used to influence the rinsing intensity at the respective point. A fast pre-cleaning of the corresponding items to be washed is thus achieved by a repeated and rapid succession on / off the pump. On the other hand, if the items to be washed are to be thoroughly cleaned, the operating time of the pump is selected to be longer compared to the on / off times.

Figur 1

in einer ersten perspektivischen Darstellung einen Spülgutkorb mit einer Sprühvorrichtung, die eine erfindungsgemäße Sprüheinheit bereitstellt;

Figur 2

in einer zweiten perspektivischen Darstellung den Spülgutkorb nach Figur 1;

Figur 3

in schematischer Perspektivdarstellung eine Sprühvorrichtung mit einer erfindungsgemäßen Sprüheinheit;

Figur 4

in einer Draufsicht von oben die Sprühvorrichtung nach Figur 3;

Figur 5

in einer Seitenansicht die erfindungsgemäße Sprüheinheit;

Figur 6

in einer Draufsicht von oben die erfindungsgemäße Sprüheinheit;

Figur 7

in einer schematisch perspektivischen Darstellung die erfindungsgemäße Sprüheinheit;

Figur 8

in teilgeschnittener Seitenansicht die mit einer erfindungsgemäßen Sprüheinheit ausgerüstete Sprühvorrichtung nach Figur 3;

Figur 9

in schematischer Schnittdarstellung ausschnittsweise die Sprühvorrichtung nach Figur 8 gemäß einer ersten Ausführungsform und

Figur 10

in schematischer Schnittdarstellung ausschnittsweise die Sprühvorrichtung nach Figur 8 gemäß einer zweiten Ausführungsform.

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

FIG. 1

in a first perspective view of a Spülgutkorb with a spray device that provides a spray unit according to the invention;

FIG. 2

in a second perspective view of the Spülgutkorb after FIG. 1 ;

FIG. 3

in a schematic perspective view of a spray device with a spray unit according to the invention;

FIG. 4

in a plan view from above the spray device after FIG. 3 ;

FIG. 5

in a side view, the spray unit according to the invention;

FIG. 6

in a plan view from above the spray unit according to the invention;

FIG. 7

in a schematic perspective view of the spray unit according to the invention;

FIG. 8

in a partially sectioned side view of the equipped with a spray unit according to the invention sprayer after FIG. 3 ;

FIG. 9

in a schematic sectional view of the spray device in detail FIG. 8 according to a first embodiment and

FIG. 10

in a schematic sectional view of the spray device in detail FIG. 8 according to a second embodiment.

FIG. 1 can be seen in a schematic perspective view of a Spülgutaufnahme in the form of a lower basket 2 of a dishwasher not shown. The lower basket 2 rests on the bottom wall 1 of a non-illustrated and a washing room providing Spülbehäters. In the intended use case, the lower basket 2 serves to receive items to be cleaned, for example, crockery and / or cutlery.

For loading of items to be cleaned with rinsing liquid, the dishwasher has a spraying device, which has a plurality of rotatably mounted spray arms 3, one of which in FIG. 1 is shown.

In addition to the spraying arms 3, the spraying device furthermore has a spraying device 19, which in the exemplary embodiment shown is arranged on the lower basket 2, in particular below the lower basket 2, namely between the lower basket 2 and the lower spraying arm 3. With the omission of a Spülgutaufnahme serving loops 5 leaves the presentation after FIG. 2 recognize the arrangement of the spray device 19 on the lower basket 2.

In the intended use case can for cleaning items to be washed Applying the same with rinsing liquid by means of the spray arm 3 and / or the spray device 19, wherein the spray device 19 forms a Intensivspülzone, since not only a Spülflüssigkeitsbeaufschlagung means of the spray arm 3, but also by means of the spray device 19 takes place.

The embodiment of the spray device 19 results from the Figures 3 and 4 ,

The spray device 19 has an inventive spray unit 4, which is formed in the embodiment shown annular disc shape. This is in particular the FIGS. 5, 6 and 7 detect.

The spray unit 4 is arranged within a housing 8, specifically above a storage space 9 located below it in the height direction 18. This factual context results in particular from the illustrations according to FIGS FIGS. 8 . 9 and 10 ,

On its upper side facing away from the storage space 9, the spray unit 4 has passage openings 6 on its rear side facing the storage space 9. The spray unit 4 is equipped with guide vanes 7 which project into the storage space 9.

As in particular the representation after the Figures 9 and 10 can recognize the housing 8, a circumferential upper retaining edge 12 and a peripheral lower retaining edge 13 ready. In the space between these two Halteränder 12 and 13 extending gap 14, the annular disk-shaped spray unit 4 is inserted at the edge.

The arrangement of the spray unit 4 in the gap 14 is subject to play. In the initial state, the spray unit 4 follows the weight force on the lower retaining edge 13. Due to the play-afflicted arrangement a movement of the spray unit 4 in the height direction 18 is allowed, up to a concern of the spray unit 4 on the upper retaining edge 12, which serves insofar as a cooperating with the spray unit 4 in the height direction 18 abutment.

The embodiments according to the Figures 9 and 10 differ in the design of the guide vanes 7. The vanes 7 are after FIG. 10 in their area larger than those behind FIG. 9 educated. In that regard, cover the vanes 7th a larger area of provided by the storage space 9 cross-sectional area.

How the particular Figures 3 and 4 can recognize, provided by the housing 8 storage space 9 is connected to a connecting pipe 10, which in turn opens into a connecting flange 11. In the final assembled state, the connecting pipe 10 is connected by means of the connecting flange 11 to a rinsing liquid supply, so that in the intended use case via the connecting pipe 10 rinsing liquid can flow into the storage space 9 provided by the housing 8.

In the exemplary embodiment shown, a rinsing fluid channel 15 is connected to the storage space 9 provided by the housing 8, moreover at one end and at the other end. In the intended use case, rinsing liquid can flow from the storage space 9 at one end into the rinsing liquid channel 15, which is then passed back into the storage space 9 provided by the housing 8 after flowing through the rinsing liquid channel 15. As the Figures 3 and 4 furthermore, the flushing liquid channel 15 has passage openings 16 through which flushing liquid can be discharged into the flushing space provided by the flushing container.

For arranging the spray device 19 on the lower basket 2, this has on the underside formed thereon holder 17, which can preferably be clamped onto the plastic-coated wires of the lower basket 2.

The operation of the spray unit 4 according to the invention is the following.

In the intended use case flushing liquid passes through the connecting pipe 10 in the space provided by the housing 8 9. There it applies to the underside of the spray unit 4 provided vanes 7, as a result of which a rotational movement of the spray unit 4 takes place in relation to the spray unit 4 receiving housing 8 , This twisting movement is a few degrees, depending on the ratio of the size of the vanes on the one hand and the remaining free cross section of the storage space 9 on the other.

The entering into the storage space 9 rinsing liquid causes reaching a certain Staudrucks lifting the spray unit 4 in the height direction 18, wherein an application of the spray unit 4 takes place at serving as abutment upper retaining edge 12. As a result of this application of the spray unit 4 to the abutment 12, the previously indicated rotational movement of the spray unit 4 is stopped and the spray unit 4 pressed positionally against the abutment 12, resulting in a sealing of the spray unit 4 relative to the housing 8. The rinsing liquid contained in the storage space 9 is discharged via the passage openings 6 of the spray unit 4 in the direction of the items to be cleaned picked up by the washing compartment and to be cleaned.

As soon as the conveyance of the rinsing liquid is stopped, the pressure inside the storage space 9 decreases, with the result that the rinsing unit 4 decreases again following the weight force and rests on the lower retaining edge 13. When again rinsing liquid promotion of the cycle described above is repeated, that is, the rinsing unit 4 is rotated by a certain angle until it rests again sealingly on the abutment 12.

As a result of the twisting movement of the spray unit 4, the passage openings 6 provided therefrom are variable in location, and this with simultaneously improved tightness, so that unwanted leaks are avoided, which minimizes associated pressure losses.

A part of the rinsing liquid introduced into the storage space 9 flows into the rinsing liquid channel 15. Rinsing liquid is likewise dispensed in the direction of the items to be cleaned picked up by the washing compartment and via the passage openings 16 provided therefrom. In contrast to the passage openings 6 of the spray unit 4, however, the passage openings 16 provided by the flushing liquid channel 15 are not spatially variable in relation to the flushing liquid channel 15.

reference numeral

1

bottom wall

2

lower basket

3

spray arm

4

spray

5

loops

6

Through opening

7

vane

8th

casing

9

storage space

10

connecting pipe

11

flange

12

upper retaining edge (abutment)

13

lower holder edge

14

gap

15

liquid channel

16

Through opening

17

holder

18

height direction

19

sprayer

Claims (10)

Dishwasher with a rinsing room providing a rinsing container and a spraying device for applying to be cleaned items to be washed with rinsing liquid, wherein the spray device has a rotatably mounted spray unit (4), which has passage openings (6) for the passage of the rinsing liquid,
characterized,
in that the spray unit (4) has a disk-shaped design and is arranged so as to be vertically movable within a housing (8), the housing (8) providing an abutment (12) cooperating with the spray unit in the vertical direction (18). Dishwasher according to claim 1,
characterized,
that the spray unit (4) in the case of loading seals against the abutment (12). Dishwasher according to claim 1 or 2,
characterized,
that between the abutment (12) and spray unit (4), a sealing element is arranged and / or that the spray unit (4) and / or the abutment (12) is made of a sealing material, in particular silicone or are. Dishwasher according to one of the preceding claims,
characterized,
that the spray unit (4) is formed annular disc-shaped. Dishwasher according to one of the preceding claims,
characterized,
that the housing (8) below one of the spray unit (4) has formed storage space (9) for flushing liquid. Dishwasher according to one of the preceding claims,
characterized,
that the spray unit (4) protruding on its side facing the storage space (9) facing back into the storage space (9) vanes (7). Dishwasher according to one of the preceding claims,
characterized,
that the spray unit (4) in the region of a floor, ceiling and / or side wall of the washing (4) is arranged. Dishwasher according to one of claims 1 to 6,
characterized,
that the spray unit (4) is arranged at a moved out formed from the washing Spülgutaufnahme. Dishwasher according to one of the preceding claims,
characterized,
in that a flushing liquid channel (15) is connected to the storage space (9) of the housing (8). Dishwasher according to the preceding claim,
characterized,
that comprises the flushing liquid channel (15) through openings (6) for the passage of the rinsing liquid.

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