EP3687363B1 - Domestic dishwasher - Google Patents

Description

The present invention relates to a household dishwasher.

A dishwasher can have a washing container and spray devices arranged in the washing container for spraying items to be washed with washing liquid and/or fresh water. For example, such a spray device, in particular as a so-called roof gyroscope, can be mounted on a ceiling of the washing container.

The WO 2008/125474 A1 describes a dishwasher with a hydraulic system and at least one roof spray device arranged above a dish rack, which can be supplied with washing liquid by means of the hydraulic system and which has a rotatable spray head which is attached to the hydraulic system by means of a cage. The spray head is rotatably mounted in the cage.

The EP 1 232 720 A2 describes a spray device for distributing washing liquid in a dishwasher. The spray device has at least one stationary spray nozzle and at least one movably mounted scattering device associated with the spray nozzle.

The JP 2004 236963 A describes a spray device for a dishwasher. The spray device comprises a spray head which is rotatably mounted on a supply line and which is set in rotation by means of a nozzle provided on the supply line.

The US 2015/0366430 A1 shows a device for rinsing glasses or bottles placed over a rotating element.

The US 1,916,806 A discloses a steam-operated dishwasher in which water and steam are distributed by a rotary element.

Against this background, one object of the invention is to provide an improved household dishwasher.

Accordingly, a domestic dishwasher is proposed. The domestic dishwasher comprises a washing container and at least one spray device arranged inside the washing container for spraying washing solution and/or fresh water in the washing container, wherein the spray device comprises a cage, a rotary element rotatably mounted in the cage and a supply line with a nozzle for supplying the washing solution and/or the fresh water to the rotary element. In its operating position, which it assumes at least when washing solution and/or fresh water is supplied to it, the rotary element is raised with respect to a direction of gravity and set in a rotational movement and arranged completely above the nozzle. The rotary element comprises a hub and rotor blades connected to the hub, wherein the hub is designed to supply the washing solution and/or the fresh water supplied to the hub with the aid of the supply line to the rotor blades during operation of the domestic dishwasher.

Because the rotary element is arranged above the nozzle, at least in its operating position with respect to the direction of gravity, the spray device can be used to spray the washware holders arranged in the washing container or the washware held in the washware holders from below. This achieves improved cleaning performance. With the help of the rotatably mounted rotary element, the washing solution and/or the fresh water can be distributed in the washing container, in particular in the form of a hemispherical spray pattern. The rotatable mounting of the rotary element thus further improves the cleaning performance.

According to the invention, the gyro element is arranged completely above the nozzle in its operating position, which is to be understood as meaning that all elements and/or areas of the gyro element are arranged above the nozzle with respect to the direction of gravity. In this way, when the gyro element is in operation, a clear dimension is created between the nozzle and the gyro element at every point, which allows dirt particles to pass through and thus counteracts a failure or malfunction due to contamination. The clear dimension refers to the width and/or height of a gap that arises between two adjacent parts of the nozzle on the one hand and the gyro element on the other. Preferably, the clear dimension between the nozzle and the gyro element in the operating position of the gyro element is at least 3 mm, preferably at least 4 mm and particularly preferably at least 5 mm. The spray device is thus designed to be resistant to contamination.

In particular, the gyro element is arranged inside the cage and mounted thereon. Preferably, the nozzle is designed to spray the rinsing solution and/or the fresh water against the direction of gravity under pressure onto the gyro element. This means that when the household dishwasher is in operation, the rinsing solution and/or the fresh water is sprayed against the direction of gravity onto the gyro element using the nozzle, which is then raised into its operating position against the direction of gravity and set in a rotational movement. This distributes the rinsing solution in the washing container. The spray device can, for example, be fixedly attached to the washing container or to a dishware holder accommodated in the washing container. In particular, the spray device can be provided on a base of the washing container. The spray device can also be arranged on a spray arm rotatably mounted on or in the washing container. Preferably, a plurality of spray devices are provided. The supply line and the nozzle are preferably provided in or on a housing of the spray device. The cage is preferably attached to the housing. Alternatively, the cage can also be formed as a single piece with the housing. Furthermore, the supply line can also be formed as one piece with the cage. This means that the cage can have the supply line or vice versa.

Embodiments are also possible in which the rotary element is already arranged in its operating position without the influence of the sprayed-on rinsing solution and/or the fresh water. This can be achieved by a corresponding structural design. Embodiments in which the rotary element is only raised into its operating position by the influence of the sprayed-on rinsing solution and/or the fresh water have the advantage of a particularly simple construction and a further improved possibility of cleaning, in particular the bearing points, in the rest position.

According to one embodiment of the invention, exactly one nozzle is provided which is designed to spray the rinsing liquid and/or the fresh water centrally onto the rotary element.

For this purpose, the nozzle can be provided centrally below the gyro element. In particular, the nozzle can be arranged centrally with respect to a rotation axis of the gyro element. However, the nozzle can also be positioned offset to the gyro element or to the rotation axis. The nozzle is implemented by providing a cross-sectional constriction on the supply line. This means that the nozzle represents a cross-sectional constriction on the supply line. This can increase the pressure of the rinsing solution and/or the fresh water sprayed with the help of the nozzle.

According to a further embodiment, the gyro element has a curved, in particular spherical cap-shaped, outer contour.

The outer contour is preferably provided on the rotor blades of the gyro element. The spherical cap-shaped outer contour is formed when the gyro element rotates about its axis of rotation. This means that the outer contour is an envelope, in particular an enveloping surface, preferably a three-dimensional envelope curve, of the rotating gyro element. A spherical cap, a spherical segment or a spherical section is part of a spherical body that is formed by a section with a plane. Such a spherical cap has the shape of a dome and has a circular disk as its base.

According to a further embodiment, the cage is curved, in particular curved in the shape of a spherical cap.

This means that the cage is designed to correspond to the gyro element. This results in a particularly compact installation space for the spray device. Alternatively, the cage and/or the gyro element can also have a different geometry. The cage preferably has several struts that are connected to one another on a bearing plate of the cage. The gyro element is in turn rotatably mounted on the bearing plate. For this purpose, the bearing plate has an axis that is rotatably received in a central receiving section of a hub of the gyro element. Alternatively, the hub of the gyro element can also have the axis, which is then rotatably received in a receiving section that is formed in the bearing plate. In order to achieve the lowest possible installation height of the spray device, it is sensible in such an embodiment to reduce the material thickness of the bearing plate and thus of the cage in the range above the receiving section (with respect to the direction of gravity) compared to the adjacent areas of the bearing plate.

The impeller element comprises a hub and rotor blades connected to the hub, wherein the hub is designed to supply the washing liquid and/or the fresh water supplied by means of the supply line to the hub to the rotor blades during operation of the household dishwasher.

The hub and the rotor blades are preferably made of one piece material. The rotor element is preferably a one-piece plastic component, in particular a plastic injection-molded component. With the help of the rotor blades, the rotor element is set in rotation by spraying the rinsing solution and/or the fresh water onto the hub. This distributes the rinsing solution and/or the fresh water around the spray device. This results in a spherical spray pattern in particular, which improves the cleaning performance.

According to a further embodiment, the hub is rotationally symmetrical to a rotation axis of the gyro element and has a conical outer surface.

The hub preferably does not have a truncated cone geometry, but rather a conical geometry with a conical tip or point. A conical half-angle or conical angle of the outer surface can be, for example, 30° to 60°, more preferably 40° to 50°, more preferably 45°. The rinsing solution and/or the fresh water is fed to the rotor blades along the conical outer surface. The spray pattern of the spray device can be freely defined by varying the geometry of the outer surface, i.e. the size of the conical angle. By varying the conical angle of the hub of the rotary element and rotating it, an almost completely filled hemispherical spray pattern can be created around the spray device.

According to a further embodiment, the lateral surface is designed in several stages and has several lateral surface sections which differ from one another in their cone angles.

For example, a first lateral surface section with a first cone half angle or first cone angle and a second lateral surface section with a second cone half angle or second cone angle are provided. The second cone angle is preferably larger than the first cone angle. A circular-cylindrical lateral surface section can also be provided between the conical lateral surface sections.

According to a further embodiment, the hub is designed asymmetrically to a rotation axis of the gyro element, so that a spray angle of the spray device varies during operation of the household dishwasher.

This allows a chaotic distribution of the rinsing solution and/or the fresh water to be achieved. This leads to an even better cleaning performance. In this case, the hub preferably has a surface that is not rotationally symmetrical to the axis of rotation. The surface can have sections with different angles of inclination. The surface can also be a free-form surface.

According to a further embodiment, the rotor blades are inclined at an angle of inclination relative to the axis of rotation.

The angle of inclination can be, for example, 20° to 60°, preferably 30° to 50°, more preferably 35° to 45°, more preferably 40°. The rotor blades can additionally have a curved or bent shape when viewed in a radial direction of the gyro element. The radial direction is in particular oriented perpendicular to the axis of rotation and away from it.

According to a further embodiment, the rotor blades are connected to one another by means of a connecting ring which runs around the rotor element.

Preferably, the hub, the rotor blades and the connecting ring are a one-piece component, in particular a plastic injection-molded component.

With the help of the structural design of the hub and the rotor blades, a freely definable spray pattern can be achieved according to the selected cone angle of the hub. By using different cone angles and/or the previously mentioned asymmetric By designing the hub, a completely filled, hemispherical spray pattern can be created around the spray device. The way the spray device works is particularly clear visually for a user of the household dishwasher and the added value of the spray device is easy to understand. The spray device is resistant to contamination due to a sufficiently large bearing play in the axial and radial direction and a sufficiently large design of a bearing gap between the axle and the receiving section in which the axle is rotatably received. This applies both to designs in which the axle is formed on the bearing plate and thus on the cage, and to designs in which the axle is formed on the hub and thus on the gyro element. Even if the gyro element is blocked, there is still very good emergency running behavior because the hub alone distributes the washing liquid and/or the fresh water sufficiently. Due to its spherical cap-shaped geometry, the spray device has a low installation height, which means that it can be positioned below the washware holders.

Other possible implementations of the household dishwasher also include combinations of features or embodiments described above or below with regard to the exemplary embodiments that are not explicitly mentioned. The person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher.

• Fig. 1 zeigt eine schematische perspektivische Ansicht einer Ausführungsform einer Haushalts-Geschirrspülmaschine;
• Fig. 2 zeigt eine schematische Aufsicht einer Ausführungsform einer Sprüheinrichtung für die Haushalts-Geschirrspülmaschine gemäß Fig. 1;
• Fig. 3 zeigt eine schematische Schnittansicht der Sprüheinrichtung gemäß Fig. 2;
• Fig. 4 zeigt eine weitere schematische Schnittansicht der Sprüheinrichtung gemäß Fig. 2;
• Fig. 5 zeigt eine schematische Schnittansicht einer weiteren Ausführungsform einer Sprüheinrichtung für die Haushalts-Geschirrspülmaschine gemäß Fig. 1;
• Fig. 6 zeigt eine schematische Schnittansicht einer weiteren Ausführungsform einer Sprüheinrichtung für die Haushalts-Geschirrspülmaschine gemäß Fig. 1;
• Fig. 7 zeigt eine schematische Schnittansicht einer weiteren Ausführungsform einer Sprüheinrichtung für die Haushalts-Geschirrspülmaschine gemäß Fig. 1; und
• Fig. 8 zeigt eine schematische Schnittansicht einer weiteren Ausführungsform einer Sprüheinrichtung für die Haushalts-Geschirrspülmaschine gemäß Fig. 1.

Further advantageous embodiments and aspects of the household dishwasher are the subject of the subclaims and the embodiments of the household dishwasher described below. The household dishwasher is explained in more detail below using preferred embodiments with reference to the attached figures.

• Fig.1 shows a schematic perspective view of an embodiment of a household dishwasher;
• Fig.2 shows a schematic plan view of an embodiment of a spray device for the household dishwasher according to Fig.1 ;
• Fig.3 shows a schematic sectional view of the spray device according to Fig.2 ;
• Fig.4 shows a further schematic sectional view of the spray device according to Fig.2 ;
• Fig.5 shows a schematic sectional view of another embodiment of a spray device for the household dishwasher according to Fig.1 ;
• Fig.6 shows a schematic sectional view of another embodiment of a spray device for the household dishwasher according to Fig.1 ;
• Fig.7 shows a schematic sectional view of another embodiment of a spray device for the household dishwasher according to Fig.1 ; and
• Fig.8 shows a schematic sectional view of another embodiment of a spray device for the household dishwasher according to Fig.1 .

In the figures, identical or functionally equivalent elements have been given the same reference numerals, unless otherwise stated.

The Fig.1 shows a schematic perspective view of an embodiment of a household dishwasher 1. The household dishwasher 1 comprises a washing container 2 which can be closed by a door 3, in particular in a watertight manner. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 is preferably cuboid-shaped. The washing container 2 can be arranged in a housing of the household dishwasher 1. The washing container 2 and the door 3 can form a washing chamber 4 for washing dishes.

Door 3 is in the Fig.1 shown in its open position. The door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3. A loading opening 6 of the washing container 2 can be closed or opened with the help of the door 3. The washing container 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 arranged opposite one another. The base 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made, for example, from a stainless steel sheet. Alternatively, for example, the base 7 can be made of a plastic material.

The household dishwasher 1 further comprises at least one dishware holder 12 to 14. Preferably, several, for example three, dishware holders 12 to 14 can be provided, wherein the dishware holder 12 can be a lower dishware holder or a lower basket, the dishware holder 13 can be an upper dishware holder or an upper basket and the dishware holder 14 can be a cutlery drawer. As the Fig.1 further shows, the washware holders 12 to 14 are arranged one above the other in the washing container 2. Each washware holder 12 to 14 can be moved either into or out of the washing container 2. In particular, each washware holder 12 to 14 can be pushed or moved into the washing container 2 in an insertion direction E and pulled or moved out of the washing container 2 in an extraction direction A opposite to the insertion direction E.

The Fig. 2 shows a schematic plan view of an embodiment of a spray device 15 for the household dishwasher 1. The Fig.3 and 4 each show a schematic sectional view of the spray device 15. The spray device 15 can be provided, for example, on the base 7 of one of the washware receptacles 12 to 14 or on spray arms (not shown) of the household dishwasher 1. Preferably, several such spray devices 15 are provided. The spray device 15 is designed to distribute and/or spray wash liquor and/or fresh water F within the washing container 2.

The spray device 15 comprises a cage 16, a rotary element 17 rotatably mounted in the cage 16 and a supply line 18 with a nozzle 19 for supplying the rinsing solution and/or the fresh water F to the rotary element 17. The rotary element 17 is in the Figures 3 and 4 (as in the Figures 5 to 8 ) are each shown in their operating position. The cage 16 is preferably made of a plastic material. For example, the cage 16 is a plastic injection-molded component. The cage 16 can be formed in one piece with the supply line 18. This means that the cage 16 can have the supply line 18 or vice versa. The cage 16 comprises several, for example three, struts 20 to 22, which are evenly distributed around a bearing plate 23. The bearing plate 23 can be circular or have any other geometry.

The bearing plate 23 can be designed to be rotationally symmetrical to a rotation axis M of the gyro element 17. On the underside, i.e. facing the circular element 17, a bolt or an axle 24 is provided on the bearing plate 23, on or at which the gyro element 17 is rotatably mounted. The bearing plate 23 is designed as one piece with the axle 24. The struts 20 to 22 are preferably arranged evenly distributed around the rotation axis M. At an end section of the struts 20 to 22 facing away from the bearing plate 23, these each have a fastening section 25 to 27.

The fastening sections 25 to 27 can be firmly connected to a housing 28 of the spray device 15. For example, the fastening sections 25 to 27 are clipped or snapped into the housing 28. The supply line 18 with the nozzle 19 can be provided in the housing 28. Receiving sections 29 to 31 corresponding to the fastening sections 25 to 27 can be provided on the housing 28. For example, the fastening sections 25 to 27 are connected to the receiving sections 29 to 31 in a form-fitting manner. A form-fitting connection is created by the interlocking or engagement of at least two connection partners, in this case the fastening sections 25 to 27 and the receiving sections 29 to 31.

The cage 16, i.e. the struts 20 to 22, are curved, in particular curved in the shape of a spherical cap. As a result, the spray device 15 has a spherical cap geometry. A spherical cap, a spherical segment or a spherical section is a part of a spherical body that is formed by a cut with a plane. A spherical cap has the shape of a dome and has a circular disk as its base.

As previously mentioned, the supply line 18 with the nozzle 19 can be provided in the housing 28. The nozzle 19 is characterized in that it forms a cross-sectional constriction compared to the supply line 18. This allows the rinsing liquid and/or the fresh water F to flow out of the nozzle 19 under high pressure and/or be sprayed with the help of this. The nozzle 19 is preferably designed to be rotationally symmetrical to the axis of rotation M. Alternatively, the nozzle 19 can also be designed asymmetrically to the axis of rotation M and/or be arranged offset relative to it. However, the nozzle 19 is preferably placed centrally under the axis 24.

As the Fig.3 and 4 show, the gyro element 17 is arranged in its operating position with respect to a direction of gravity g completely above the nozzle 19. In other words, the nozzle 19 is positioned completely below the gyro element 17 with respect to the direction of gravity g. The direction of gravity g is the direction in which gravity acts. In the orientation of the Fig.3 and 4 the direction of gravity g is oriented from top to bottom. This means that with the help of the nozzle 19 the rinsing liquid and/or the fresh water F can be sprayed onto the rotary element 17 against the direction of gravity g.

The impeller element 17 comprises a hub 32 and a plurality of blades 33 to 36 connected to the hub 32. For example, four such blades 33 to 36 can be provided. With the help of the blades 33 to 36, the impeller element 17 can be set in rotation when it is exposed to the rinsing solution and/or the fresh water F. Fewer than four, for example three, or more than four blades 33 to 36 can also be provided. The blades 33 to 36 can, as in the Fig.4 shown, be inclined at an angle of inclination α to the axis of rotation M. The angle of inclination α can be, for example, 20° to 60°, preferably 30° to 50°, more preferably 35° to 45°, more preferably 40°.

The rotor blades 33 to 36 are also curved or arched when viewed in a radial direction R of the gyro element 17. The radial direction R is perpendicular to the axis of rotation M and oriented away from it. The rotor blades 33 to 36 are in particular formed as a single piece with the hub 32. For example, the gyro element 17 can be a plastic injection-molded component. The rotor blades 33 to 36 are connected to one another by means of a connecting ring 37 that runs around the gyro element 17.

A receiving section 38 for receiving the axle 24 of the cage 16 is provided in the middle of or on the hub 32. The dimensions of the axle 24 and the receiving section 38 are designed such that there is sufficient play between the axle 24 and the receiving section 38 so that even if dirt particles have accumulated between the axle 24 and the receiving section 38, a rotary movement of the gyro element 17 is not hindered. The cage 16, in particular the axle 24 on the bearing plate 23, and the gyro element 17, in particular the receiving section 38 in the hub 32, are designed in such a way that the rotary element 15 in its rest position without the influence of sprayed rinsing liquid and/or fresh water initially rests on the housing 28 of the spray device 15 due to gravity and only by the force of the sprayed rinsing liquid and/or fresh water against gravity returns to its Figure 3 shown operating position is pressed.

The gyro element 17 has, as shown in the Fig.3 shown, a curved, in particular spherical cap-shaped, curved outer contour 39 corresponding to the spherical cap-shaped geometry of the cage 16. The hub 32 is in particular rotationally symmetrical to the axis of rotation M. In particular, the hub 32 has a conical outer surface 40 with a conical half-angle or conical angle β. The conical angle β can be, for example, 30° to 60°, preferably 40° to 50°, more preferably 45°. The hub 32 is preferably conical and not frustoconical and has a conical tip or tip 41. This allows the rinsing liquid and/or the fresh water F to be drained off particularly well.

The functionality of the spray device 15 is explained below. Rinsing solution and/or fresh water F is supplied to the nozzle 19 via the supply line 18, which is sprayed onto the hub 32 arranged above the nozzle 19 in the direction of gravity g. The rinsing solution and/or fresh water pressure thus applied to the rotary element 17 and acting against gravity causes the rotary element 17 to be raised from its rest position (not shown), in which it rests on the housing 28 of the spray device 15, into its Figures 3 to 8 The rinsing solution and/or the fresh water F is guided outwards in the radial direction R via the conical surface 40 of the hub and is at least partially fed to the rotor blades 33 to 36. This causes the rotor element 17 to rotate, as shown in the Fig.3 is shown by means of an arrow 42. The rinsing liquid and/or the fresh water F is discharged from the hub 32 at a spray angle γ, which can correspond to the cone angle β. In addition, the rinsing liquid and/or the fresh water F is also distributed with the aid of the rotor blades 33 to 36. This results in a hemispherical spray pattern around the spray device 15, which can only have a dead zone in the area of the bearing plate 23. The spray pattern can be varied and/or adapted by varying the cone angle β.

In embodiments of the spray device in which the rotary element 17 is held in its operating position due to design measures even without the influence of the rinsing solution and/or fresh water pressure, the lifting of the rotary element 17 from its rest position to the operating position is of course eliminated.

The Fig.5 shows a schematic sectional view of another embodiment of a spray device 15. The embodiment of the spray device 15 according to the Fig.5 differs from the embodiment of the spray device 15 according to the Fig. 2 to 4 merely by an alternative design of the gyro element 17, in particular the hub 32 thereof. The hub 32 has a multi-stage lateral surface 40 which comprises, for example, a first lateral surface section 43 and a second lateral surface section 44. The lateral surface sections 43, 44 differ in their cone half angles or cone angles β1, β2. For example, a first cone angle β1 of a first lateral surface section 43 is smaller than a second cone angle β2 of a second lateral surface section 44. By varying the cone angles β1, β2, the spray angle γ and thus also the spray pattern of the spray device 15 can be adapted as required.

The Fig.6 shows a schematic sectional view of another embodiment of a spray device 15. The spray device 15 according to the Fig.6 differs from the spray device 15 according to the Fig. 2 to 4 also only by an alternative design of the gyro element 17, in particular the hub 32 thereof. In this embodiment of the gyro element 17, the hub 32 of the gyro element 17 is not rotationally symmetrical to the axis of rotation M, but asymmetrical, in particular rotationally asymmetrical, to it. In this case, "rotational asymmetry" is to be understood as the opposite of "rotational symmetry". This means that the hub 32 is, as previously mentioned, not a body that is rotationally symmetrical to the axis of rotation M. This means that the spray angle γ always varies during operation of the household dishwasher 1. This means that different spray angles γ can be generated. This makes it possible to achieve a chaotic spray pattern and thus a particularly good cleaning performance. A lateral surface 45 of the hub 32 can have any three-dimensional geometry. The hub 32 preferably tapers to a point and has a tip 46 facing the nozzle 19.

The Fig.7 shows a schematic sectional view of another embodiment of a spray device 15. The spray device 15 according to the Fig.7 differs from the spray device 15 according to the Fig. 2 to 4 essentially by an alternative design of the gyro element 17, in particular the hub 32 thereof. In this embodiment of the spray device 15, the hub 32 of the gyro element 17 is indeed rotationally symmetrical to the axis of rotation M, but the hub 32 is constructed in several stages and comprises a lateral surface 40 that is rotationally symmetrical to the axis of rotation M and has a first conical lateral surface section 43, a second conical lateral surface section 44 and a circular-cylindrical third lateral surface section 47 arranged between the first lateral surface section 43 and the second lateral surface section 44. The conical lateral surface sections 43, 44 preferably have different cone half-angles or cone angles β1, β2. The cone angles β1, β2 can also be identical.

With the help of the design of the hub 32 and the rotor blades 33 to 36, a freely definable spray pattern can be achieved according to the selected cone angles β, β1, β2. By using different cone angles β, β1, β2 and/or an asymmetrical design of the hub 32, a completely filled hemispherical spray pattern can be generated around the spray device 15.

The Fig.8 shows a schematic sectional view of another embodiment of a spray device 15. The spray device 15 according to the Fig.8 differs from the spray device 15 according to the Fig.3 essentially by an alternative design of the gyro element 17 and the bearing plate 23, in particular with regard to the axle 24 and the receiving section 38 for the axle 24. In this embodiment of the spray device 15, the bolt or the axle 24 is not provided on the bearing plate 23, but on the top, i.e. facing the bearing plate 23, in the middle of the hub 32 of the gyro element 17. Accordingly, the receiving section 38 for receiving the axle 24 is not provided on or in the hub 32 of the gyro element 17, but on or in the bearing plate 23. The dimensions of the axle 24 and the receiving section 38 are again designed such that there is sufficient play between the axle 24 and the receiving section 38, so that even if dirt particles have accumulated between the axle 24 and the receiving section 38, a rotary movement of the gyro element 17 is not hindered. In order to achieve the lowest possible height of the spray device 15, the bearing plate 23 and thus the cage 16 in the area above the receiving section 38 (with respect to the direction of gravity) can have a reduced material thickness compared to the adjacent areas. Of course, the modified bearing can be designed according to the Figure 8 also in the embodiments according to the Figures 3 to 7 be applied.

The functionality of the spray device 15 is clearly visible to a user of the household dishwasher 1 and the added value of the spray device 15 is easy to understand. The spray device 15 is resistant to contamination due to a sufficiently large bearing play in the axial and radial direction and a sufficiently large design of a bearing gap between the axis 24 and the receiving section 38. Even if the rotary element 17 is blocked, there is still very good emergency running behavior, since the hub 32 alone sufficiently distributes the washing liquid and/or the fresh water F. The spray device 15 has a low installation height, which means that it can be positioned below the washware holders 12 to 14.

Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Reference symbols used:

1

Household dishwasher

2

Rinse container

3

door

4

Washing room

5

Swivel axis

6

Loading opening

7

Floor

8

Ceiling

9

Back wall

10

Side wall

11

Side wall

12

Dishwasher intake

13

Dishwasher intake

14

Dishwasher intake

15

Spray device

16

cage

17

Gyro element

18

Supply line

19

nozzle

20

strut

21

strut

22

strut

23

Bearing plate

24

axis

25

Mounting section

26

Mounting section

27

Mounting section

28

Housing

29

Recording section

30

Recording section

31

Recording section

32

hub

33

Blade

34

Blade

35

Blade

36

Blade

37

Connecting ring

38

Recording section

39

Outer contour

40

Shell surface

41

Great

42

Arrow

43

Shell surface section

44

Shell surface section

45

Shell surface

46

Great

47

Shell surface section

A

Extraction direction

E

Insertion direction

F

Rinse water/fresh water

G

Gravity direction

M

Rotation axis

R

Radial direction

α

Tilt angle

β

Cone angle

β1

Cone angle

β2

Cone angle

γ

Spray angle

Claims (13)

1. Household dishwasher (1), with a washing container (2) and at least one spray facility (15) arranged within the washing container (2) for spraying washing liquor and/or fresh water (F) in the washing container (2), wherein the spray facility (15) comprises a cage (16), a gyro element (17) rotatably supported in the cage (16) and a supply line (18) with a nozzle (19) for supplying the washing liquor and/or fresh water (F) to the gyro element (17), wherein, in its operating position, which it assumes at least when washing liquor and/or fresh water (F) is supplied to it, the gyro element (17) is raised in relation to a direction of gravity (g) and is made to rotate and is arranged in its entirety above the nozzle (19), wherein the gyro element (17) has a hub (32) and blades (33 - 36) connected to the hub (32), and wherein the hub (32) is designed to supply the washing liquor and/or fresh water (F) supplied to the hub (32) with the aid of the supply line (18) to the blades (33 - 36) during operation of the household dishwasher (1).
2. Household dishwasher according to claim 1, characterised in that a clearance between the nozzle (19) and the gyro element (17) when the gyro element (17) is in the operating position is at least 3 mm, preferably at least 4 mm and particularly preferably at least 5 mm.
3. Household dishwasher according to claim 1 or 2, characterised in that an axle (24), which is supported rotatably in a holding segment (38) of a bearing plate (23) of the cage (16), is configured on a hub (32) of the gyro element (17).
4. Household dishwasher according to claim 3, characterised in that the bearing plate (23) has a reduced material thickness in a region located above the holding segment (38) in relation to the direction of gravity (g) compared with adjacent regions.
5. Household dishwasher according to one of claims 1 to 4, characterised in that just one nozzle (19) is provided, which is designed to spray the washing liquor and/or fresh water (F) onto the centre of the gyro element (17).
6. Household dishwasher according to one of the preceding claims, characterised in that the gyro element (17) rests on a housing (28) of the spray facility (15) in its rest position when no washing liquor and/or fresh water (F) is supplied to the gyro element (17).
7. Household dishwasher according to one of the preceding claims, characterised in that the gyro element (17) has a curved outer contour (39), in particular one curved in the manner of a spherical cap.
8. Household dishwasher as claimed in one of the preceding claims, characterised in that the cage (16) is curved, in particular curved in the manner of a spherical cap.
9. Household dishwasher according to one of the preceding claims, characterised in that the hub (32) is configured with rotational symmetry in relation to a rotation axis (M) of the gyro element (17) and has a conical lateral surface (40).
10. Household dishwasher according to claim 9, characterised in that the lateral surface (40) is configured with a number of steps and has a number of lateral surface segments (43, 44), which differ from one another in respect of their taper angles (β1, β2).
11. Household dishwasher according to claim 10, characterised in that the hub (32) is configured asymmetrically in relation to a rotation axis (M) of the gyro element (17) so that a spray angle (γ) of the spray facility (15) varies during operation of the household dishwasher (1).
12. Household dishwasher according to one of claims 9 to 11, characterised in that the blades (33 - 36) are angled at an angle of inclination (α) relative to the rotation axis (M).
13. Household dishwasher according to one of the preceding claims, characterised in that the blades (33 - 36) are connected to one another with the aid of a connecting ring (37) running around the gyro element (17).

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