EP3863491B1 - Domestic dishwasher - Google Patents

Description

The present invention relates to a household dishwasher with a washing container which has a casing and a rear wall which is connected to the casing, and a base support which has a support surface on which the rear wall is supported on a lower edge thereof in the vertical direction.

Domestic dishwashers are known to include a washing container with a shell and a back wall. The casing and the back wall are typically made of sheet metal. The jacket has a circumferential flange. A seal is arranged between the flange and the rear wall. The jacket is connected to the rear wall by spot welding in the area of its flange. The appropriately clamped seal ensures the desired seal between the jacket and the rear wall.

In the area of household dishwashers, there is a particular challenge in that they continue to ensure the above-mentioned tightness even if they are dropped to the ground from a great height, for example one meter. Because of the fall, the washing container can be deformed in the area of the connection point (flange) between the casing and the rear wall. As a result, the seal is no longer pressed sufficiently hard and therefore no longer seals sufficiently.

The publication DE 10 2009 000 174 A1 discloses a dishwasher, in particular a household dishwasher, with a washing container which has an externally arranged flange arrangement, and with a base support which has a laterally acting guide arrangement, into which the washing container is inserted from above. The flange arrangement has a holding section which is bent so that it cooperates with a downward-facing surface of the guide arrangement in such a way that the washing container is positively connected to the base support.

The publication EP 2 625 997 A1 discloses a dishwasher with a structure comprising a washing container made of a metal material, which extends from a base electrically non-conductive material, the base having a plurality of peripheral walls which define a housing space for a plurality of electrical loads which can be supplied by means of a supply cable for connection to an AC network, wherein between the supply cable and the plurality of electrical loads Filter device is provided, which comprises an interference filter, and wherein the filter device is attached to a wall of the base. The interference filter has a connection made of a metal material for grounding the washing container, comprising a metal clip which has a contact section.

The publication DE 196 11 055 A1 discloses a dishwasher with a machine base on which a washing container can be placed. The rinsing container lies directly on the upper edge of the machine base on the back, which avoids additional expenses for storing the rinsing container on the back. In this way, the flanges of the rear wall can protrude beyond the flanges of the sheet metal part of the other parts of the washing container when dismantled. These protruding parts of the flanges can then be bent in the direction of the sheet metal part of the other parts of the washing container, which overlap the flanges.

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

Accordingly, a household dishwasher is provided with a washing container and a base support. The washing container has a jacket and a rear wall which is connected to the jacket, and the base support has a first support surface on which the rear wall is supported on a lower edge thereof in the vertical direction. Furthermore, the base support has a second support surface, which is designed so that the jacket with an end section on the rear wall of the same is supported in the vertical direction when the household dishwasher is accelerated negatively. Furthermore, the second support surface is designed in the form of a trough that corresponds to the shape of the jacket.

Because the base support provides a first and a second support surface, the fall energy from the jacket when the household dishwasher hits the Soil, as described in the introduction, can be guided particularly conveniently into the base support. This avoids plastic deformation of the washing container, especially at the connection point between the jacket and the rear wall. Accordingly, the desired tightness can always be guaranteed.

“Negative acceleration” here means any abrupt braking of the household dishwasher, for example when it falls to the floor with its base support from a height of, for example, one meter or greater.

In particular, it can be provided that a distance is provided between the second support surface and the rear wall-side end section of the jacket. This takes into account any manufacturing tolerances. The distance is consumed during the above-mentioned negative acceleration by deformation of the washing container and/or the base support, so that the second support surface comes into contact with the rear wall-side end section of the jacket. The lower edge of the rear wall, on the other hand, is preferably always supported on the support surface, i.e. regardless of accelerations of the household dishwasher, and is therefore in contact with it.

The jacket can, but does not have to, be manufactured as a one-piece component. For example, the jacket can be produced as a one-piece component from a sheet metal blank by deep drawing. In other embodiments, the shell is made of a bottom, two side walls and a top wall. The parts mentioned can be manufactured as individual parts and connected to one another. Alternatively, for example, the side walls and the top wall can be provided as a (U-shaped) one-piece component, in particular sheet metal. In contrast, the base can be manufactured as a separate part and connected to the aforementioned U-shaped component. In this case, the base can be made of plastic, but also of metal, especially sheet metal. As far as sheet metal is used here, it can also be a stainless steel sheet.

In the present case, the “vertical” direction is to be understood to mean that deviations of up to 10 degrees, preferably up to 5 degrees, from the vertical are also included.

In this case, “above” and “below” refer to the gravitational vector.

The trough can also be referred to as a free-form surface. The trough is shaped in such a way that the shape of the jacket intervenes in it at least slightly.

According to a first embodiment, the trough is designed to hang freely between two side support sections and a rear support section of the base support and is supported on a bottom of the base support using one or more ribs.

This freely hanging fastening of the trough, in the manner of a hammock, allows a relatively small deformation of the base support in order to absorb the fall energy, but not to damage the washing container.

According to a second embodiment, the base support has a longitudinal web which is recessed in the area of the trough, one of the two lateral support sections being formed on an upper edge of the longitudinal web delimiting the recess.

This makes it easy to provide high-level support for the trough.

According to a further embodiment, the base support has a further longitudinal web, which forms the other of the two lateral support sections.

The further longitudinal web preferably provides a lower supporting section of the trough. “Higher” and “lower” here also refer to the gravity vector. In other words, one of the two-sided support sections is higher than the other of the two side support sections, relative to a bottom of the base support.

According to a further embodiment, the base support has a crossbar which forms the rear support section.

The transverse web runs perpendicular to the longitudinal web and/or the further longitudinal web.

“Vertical” here also includes deviations from the vertical of up to 10 degrees, preferably up to 5 degrees.

According to a further embodiment, the longitudinal web connects to the transverse web via a material thinning and/or wherein the longitudinal web is formed with a bevel adjacent to the transverse web.

Due to the bevel, there is a particularly triangular or trapezoidal recess between the longitudinal web and the transverse web. Both the thinning of the material and the bevel or recess further reduce the rigidity of the base support in order to be able to conduct the fall energy even better.

According to a further embodiment, the base support has two second support surfaces for supporting a respective rear wall-side end section of the jacket.

With the help of two second support surfaces, the fall energy can be absorbed even better.

According to a further embodiment, the end section or sections on the rear wall have rounded transitions between a base and a respective side wall of the jacket.

According to a further embodiment, the base support has a shaft which forms the first support surface on its bottom, with the rear wall engaging into the shaft from above.

The washing container is placed on the base support from above. The rear wall increasingly engages with the shaft until its lower edge comes into contact with the bottom of the shaft. At the same time, the end sections on the rear wall, in particular the rounded transitions, increasingly approach the respective assigned trough. However, there preferably remains a distance between a respective end section on the rear wall and the associated trough. This is only caused by abrupt braking (negative acceleration) of the household dishwasher and the Concomitant deformation of the washing container and / or the base support is consumed, so that the respective end section on the rear wall comes into contact with the trough assigned to it.

According to a further embodiment, the shaft has insertion ribs which are designed to insert the rear wall into the shaft and to bring the lower edge into contact with the support surface.

The insertion ribs limit deformation of the rear wall in the horizontal, but preferably also in the vertical direction. A buckling or denting of the rear wall is avoided.

According to a further embodiment, the shaft has exactly two insertion ribs over its entire length parallel to the width of the rear wall.

Surprisingly, it has been shown that two insertion ribs represent an optimal compromise: On the one hand, the deformation of the rear wall in the horizontal direction is sufficiently limited so that it does not become plastic. On the other hand, exactly two insertion ribs allow sufficient deformation of the rear wall in order to be able to transfer the falling energy between the washing container and the base support.

According to a further embodiment, the base support has a crossbar and a rear wall, which form the shaft between them, the insertion ribs extending from the crossbar towards the rear wall, the crossbar being formed with a notch adjacent to a respective insertion rib.

The notch weakens the crossbar in the area of the insertion rib, so that the insertion ribs can deform more. This is in response to a deformation of the rear wall when the household dishwasher falls or hits the ground.

According to a further embodiment, a distance between the second support surface and the rear wall-side end section of the casing is between 0.2 and 1.2 mm, preferably between 0.6 and 1 mm, even more preferably between 0.7 and 0.9 mm.

This distance is measured between the top of the second support surface and the underside of the rear wall-side end section of the jacket. A distance dimensioned in this way is well suited to accommodate the resulting manufacturing tolerances.

According to a further embodiment, the base support is made of plastic and/or the jacket is made of sheet metal.

According to a further embodiment, the jacket is connected to the rear wall using spot welds and/or a seal is arranged between the jacket and the rear wall.

Further possible implementations of the invention 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 invention.

Further advantageous refinements and aspects of the invention are the subject of the subclaims and the exemplary embodiments of the invention described below. The invention is further explained in more detail using preferred embodiments with reference to the accompanying figures.

Fig. 1

eine schematische perspektivische Ansicht einer Ausführungsform einer Haushaltsgeschirrspülmaschine;

Fig. 2

in einer perspektivischen Ansicht einen hinteren Eckbereich eines Basisträgers gemäß einer Ausführungsform, wie in Richtung des Pfeils II in der Fig. 1 gesehen;

Fig. 3

eine Ansicht III aus der Fig. 2;

Fig. 4

in einer perspektivischen Ansicht von innen nach außen gesehen einen Eckbereich eines Spülbehälters gemäß einer Ausführungsform;

Fig. 5

die Ansicht aus der Fig. 2 und der Fig. 4 übereinandergelegt, wobei der besseren Übersichtlichkeit halber eine Rückwand des Spülbehälters nicht dargestellt ist;

Fig. 6

eine Ansicht VI aus der Fig. 5, wobei die Rückwand dargestellt ist; und

Fig. 7

eine Ansicht VII aus der Fig. 2.

Show it

Fig. 1

a schematic perspective view of an embodiment of a household dishwasher;

Fig. 2

in a perspective view a rear corner area of a base support according to an embodiment, as in the direction of arrow II in the Fig. 1 seen;

Fig. 3

a view III from the Fig. 2 ;

Fig. 4

in a perspective view, seen from the inside out, a corner region of a washing container according to one embodiment;

Fig. 5

the view from the Fig. 2 and the Fig. 4 placed one on top of the other, with a rear wall of the washing container not being shown for the sake of clarity;

Fig. 6

a view VI from the Fig. 5 , with the back wall shown; and

Fig. 7

a view VII from the Fig. 2 .

In the figures, identical or functionally identical elements have been given the same reference numbers 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, in particular watertight, by a door 3. 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. 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 space 4 for washing items to be washed.

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. Using the door 3, a loading opening 6 of the washing container 2 can be closed or opened. 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 floor 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 bottom 7 can be made of a plastic material.

The household dishwasher 1 also has at least one washware holder 12 to 14. Preferably, several, for example three, washware receptacles 12 to 14 can be provided, whereby the washware receptacle 12 can be a lower washware receptacle or a lower basket, the washware receptacle 13 can be an upper washware receptacle or an upper basket and the washware receptacle 14 can be a cutlery drawer. As the Fig. 1 continues to show, the washware receptacles 12 to 14 are one above the other in the washing container 2 arranged. Each washware receptacle 12 to 14 can be moved either into or out of the washing container 2. In particular, each washware receptacle 12 to 14 can be pushed or moved into the washing container 2 in an insertion direction E (arrow) and can be pulled out or moved out of the washing container 2 counter to the insertion direction E (arrow) in an extension direction A (arrow).

How next in the Fig. 1 To see, the washing container 2 stands on a base support 15. A corner area of the base support 15 is in the Fig. 2 shown. The Fig. 2 shows a view II from the Fig. 1 .

The base support 15 comprises a second support surface in the form of a trough 16. The jacket 17 of the washing container 2 is supported on the trough 16. The jacket 17 is cut out and transparent in the Fig. 4 shown. The jacket 17 includes in particular the bottom 7 (see also Fig. 1 ) and the side wall 10 of the washing container 2 (see also Fig. 1 ). The bottom 7 and the side wall 10 adjoin each other via a rounded transition 18. The transition 18 is also arranged in an end wall section of the casing 17 on the rear wall. It is located adjacent to the rear wall 9. It should be noted that both the casing 17 and the rear wall 9 are only partially shown.

Adjacent to the rear wall 9, the jacket 17 has a flange 19. The flange 19 is welded to the rear wall 9 via spot welds 20. A seal 21 arranged between the flange 19 and the rear wall 9 is squeezed between them in order to reliably seal the connection point between the flange 19 and the rear wall 9.

The trough 16 has a shape which corresponds to the transition 18. This means that the transition 18 engages in the trough 16. The interlocking of the transition 18 and the trough 16 is in the Fig. 5 can be seen, which shows the jacket 17 in a state placed on the base support 15. The rear wall 9 is not shown for the sake of clarity. The jacket 17 is also shown transparent in order to reveal the parts of the base support 15 underneath. The trough 16 supports the jacket 17 in the area of the transition 18 in the vertical direction z, but due to its shape, also in the horizontal direction, i.e. both in the direction marked x (arrow). Direction of the device depth, as well as in the direction of the device width marked y (arrow). However, this only occurs in the event of an abrupt braking of the household dishwasher 1, for example if it falls from a height of one meter. Then a distance of in particular between 0.6 and 1 mm, in particular 0.8 mm, which would otherwise preferably exist between an upper side of the trough 16 and an underside of the transition 18, is reduced by deformation of the washing container 2, in particular of the jacket 17 and/or the Rear wall 9 and/or the base support 15 is consumed.

The trough 16 is freely hanging - in the manner of a hammock - between two side support sections 22, 23 and a rear support section 24. In addition, the trough 16 is supported downwards via two ribs 25, as in view VII from the Fig. 2 seen. The ribs 25 each connect downwards to a bottom 26 of the base support 15.

Now returning to that Fig. 2 it is shown there that the support section 22 is higher in the vertical direction z than the support section 23. The support section 22 adjoins an upper edge 27 of a longitudinal web 28 of the base support 15. The upper edge 27 limits a recess 29 at the top. The recess 29 in the longitudinal web 28 is in the Fig. 7 to recognize. The aforementioned base 26 forms a lower boundary of the recess 29.

Furthermore, the base support 15 has an additional longitudinal web 30. The longitudinal web 30 forms the second lateral support section 23 on its upper edge.

Furthermore, the base support 15 includes a crossbar 31, which forms the rear support section 24. The transverse web 31 runs at right angles to the longitudinal webs 28, 30. To the extent that longitudinal and transverse webs are used here, the longitudinal webs preferably extend in the x direction and the transverse webs extend in the y direction.

The trough 16 connects to the crossbar 31 via a material thinning 32. The longitudinal web 28 connects to the transverse web 31 via the same material thinning 32.

Furthermore, the longitudinal web 28 is formed with a bevel 33 adjacent to the transverse web 31.

The base support 15 has a further trough 16 'in the opposite corner area (see Fig. 1 ). The jacket 17 has a transition 18, not shown, which corresponds to the trough 16 'and with which it rests on the trough 16', as explained in connection with the trough 16.

In addition to the two second support surfaces (troughs 16, 16 '), the washing container 2 is supported on a first support surface 34 (see Fig. 2 ) on the base support 15. The support surface is formed by a shaft bottom 34. A corresponding shaft 35 (see Fig. 2 and 3 ) is defined between the crossbar 31 and a rear wall 36 of the base support 15. The shaft 35 is limited on its underside by the shaft bottom 34. Exactly two vertically extending insertion ribs 37 protrude from the crossbar 31 in the direction of the rear wall 36. However, only one of the insertion ribs 37 is shown. A second one is located in the opposite corner area of the base support 15. In this respect, one can also speak of a mirror-symmetrical arrangement. The axis of symmetry is in the Fig. 1 denoted by S and extends along the device depth x (arrow) and divides the device width y (arrow) into two mirror-symmetrical halves.

Returning to the Fig. 3 , which is a view III from the Fig. 2 shows, it is shown there that the insertion rib 37 increasingly widens in the direction of the shaft bottom 34. It guides the rear wall 9 or one in the Fig. 4 shown section 38 of the same when the washing container 2 is placed on the base support 15, so that the rear wall 9 or the section 38 slides increasingly downwards into the shaft 35 and are thereby increasingly pressed towards the rear wall 36 via the spreading insertion ribs 37. This continues until one in the Fig. 4 The lower edge of the rear wall 9, designated 39, comes into contact with the shaft bottom 34, that is to say rests on it. The engagement of the rear wall 9 or the section 38 in the shaft 35 is in the Fig. 6 to recognize, whereby these are also like that Fig. 5 shows the assembled state of the washing container 2 and base support 15. The Fig. 6 a view VI from the Fig. 5 represents.

Because the shaft 35 has exactly the two insertion ribs 37 over its entire length L (arrow), it allows a comparatively large deformation of the rear wall 9 in the horizontal direction, i.e. in the plane spanned by the vectors x, y. This deformability is further promoted by the material thinning 32. Adjacent to the insertion rib 37, the transverse web 31 can also have notches 40, 41, which further weaken it in terms of material technology. The notches 40, 41 run parallel in the vertical direction z (arrow) and parallel to the insertion rib 37 and are offset from one another in the y direction.

The base support 15 can be made of plastic, for example as a plastic injection molded component. The jacket 17 can be made from one-piece or multi-piece sheet metal, in particular stainless steel sheet.

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

Washroom

5

Pivot axis

6

loading opening

7

Floor

8th

Ceiling

9

Back wall

10

Side wall

11

Side wall

12

Washware storage

13

Washware storage

14

Washware storage

15

Base carrier

16

Additional support surface; trough

16'

Additional support surface; trough

17

Coat

18

crossing

19

flange

20

Spot welding

21

poetry

22

Support section

23

Support section

24

Support section

25

rib

26

Floor

27

Top edge

28

Longitudinal web

29

recess

30

Longitudinal web

31

cross bar

32

Material thinning

33

bevel

34

support surface; shaft bottom

35

shaft

36

Back wall

37

rib

38

Section

39

Bottom edge

40

score

41

score

A

Extension direction (arrow)

b

Insertion direction (arrow)

II

Arrow

III

Opinion

L

Length (double arrow)

S

Axis of symmetry

VI

Opinion

VII

Opinion

x

Device depth (arrow)

y

Device width (arrow)

e.g

Vertical direction (arrow)

Claims (14)

1. Household dishwasher (1) having an outer tub (2) which has a casing (17) and a rear wall (9), which is connected to the casing (17), and a base carrier (15), which has a first supporting surface (34), against which the rear wall (9) rests on a lower edge (39) of the same in the vertical direction (z),
   characterised in that

   - the base carrier has a second supporting surface (16), which is designed so that the casing (17) with a rear wall end section (18) of the same rests against it in the vertical direction (z) with a negative acceleration of the household dishwasher (1) and

   - the further supporting surface (16) is embodied in the shape of a depression (16) which corresponds to the casing shape.
2. Household dishwasher (1) according to claim 1, characterised in that the depression (16) is embodied so as to suspend freely between two lateral supporting sections (22, 23) and a rear supporting section (24) of the base carrier (15) and rests against a base (26) of the base carrier (15) with the aid of one or more ribs (25).
3. Household dishwasher (1) according to claim 2, characterised in that the base carrier (15) has a longitudinal web (28), which is recessed in the region of the depression (16), wherein one of the two lateral supporting sections (22, 23) is formed on an upper edge (27) of the longitudinal web (28) which delimits the recess (29).
4. Household dishwasher (1) according to claim 3, characterised in that the base carrier (15) has a further longitudinal web (30), which embodies the other of the two lateral supporting sections (22, 23).
5. Household dishwasher (1) according to claim 2, 3 or 4, characterised in that the base carrier (15) has a transverse web (31), which embodies the rear supporting section (24).
6. Household dishwasher (1) according to claim 5, characterised in that the longitudinal web (28) connects via a material thinning (32) to the transverse web (31) and/or that the longitudinal web (28) is formed adjoining the transverse web (31) with a chamfer (33).
7. Household dishwasher (1) according to one of the preceding claims,
   characterised in that the base carrier (15) has two second supporting surfaces (16, 16') for supporting a respective rear wall end section (18) of the casing (17).
8. Household dishwasher (1) according to one of the preceding claims,
   characterised in that the rear wall end sections (18) have rounded transitions between a base (7) and a respective side wall (10, 11) of the casing (17).
9. Household dishwasher (1) according to one of the preceding claims,
   characterised in that the base carrier (15) has a shaft (35), which forms the first supporting surface (34) on its base (34), wherein the rear wall (9) engages into the shaft (35) from above.
10. Household dishwasher (1) according to claim 9, characterised in that the shaft (35) has insertion ribs (37), which are designed to insert the rear wall (9) into the shaft (35) and to bring the lower edge (39) into contact with the first supporting surface (34).
11. Household dishwasher (1) according to claim 10, characterised in that the shaft (35) has precisely two insertion ribs (37) across its entire length (L) parallel to the width (y) of the rear wall (9).
12. Household dishwasher (1) according to claim 10 or 11, characterised in that the base carrier (15) has a transverse web (31) and a rear wall (36), which between them form the shaft (35), wherein the insertion ribs (37) extend from the transverse web (31) in the direction of the rear wall (36), wherein the transverse web (31) is embodied adjoining a respective insertion rib (37) with a notch (40, 41).
13. Household dishwasher (1) according to one of the preceding claims, characterised in that a distance between the second supporting surface (16) and the rear wall end section (18) of the casing amounts to between 0.2 and 1.2 mm, preferably between 0.6 and 1 mm, further preferably between 0.7 and 0.9 mm.
14. Household dishwasher (1) according to one of the preceding claims,
    characterised in that the base carrier (15) is manufactured from plastic and/or the casing (17) from sheet metal and/or the casing (17) is connected to the rear wall (9) with the aid of spot welding (20) and/or a seal (21) is arranged between the casing (17) and the rear wall (9).

Images