EP3340851B1 - Dishwasher, in particular domestic dishwasher - Google Patents

Description

The invention relates to a dishwasher, in particular a household dishwashing machine, with a washing container which comprises a plurality of wall parts and which is provided on the front with a loading opening for loading washware, which can be closed at least temporarily by a container door.

Such a dishwasher is for example from the publication DE 75 20 122 U1 known. The dishwashing machine disclosed comprises a washing container with a jacket which is open on the front for loading items to be washed, which is composed of a plurality of sheet metal blanks which are connected to one another by seams and which are densely assembled and which has a stepped edge surrounding the loading opening, at least in sections, for receiving a seal. The edge is shaped in a step-like manner by expanding the edge zone of the folded washing container surrounding the loading opening. The expanded edge can extend over the side walls and the ceiling of the washing compartment, while the bottom at the loading opening can have an expanded undercut. In the illustrated embodiment, the one sheet metal blank is the ceiling of the washing container, while the second sheet metal blank forms the middle section of the washing container with the side walls and its rear wall. The second sheet metal blank thus forms the vertical walls of the rinsing container, so in the installed state it represents the shape of a so-called "lying U". And the third sheet metal blank ultimately forms the bottom of the washing container.

The publication DE 69 24 403 U1 discloses a washing container for a dishwasher with interconnected floor, ceiling and side walls made of sheet metal. The respective side wall is connected to the floor and ceiling wall by crimping the adjacent edges. The vertical side walls made of a piece of sheet metal thus once again represent the shape of a so-called "lying U" when installed.

The publication GB 2 064 309 B also discloses a dishwashing container for a dishwasher with interconnected bottom-top and side walls made of sheet metal. The respective side wall is connected to the floor and ceiling wall by a Beading the adjacent edges connected. Thus, the three vertical side walls made of a piece of sheet metal in the installed state also represent the shape of a so-called "lying U's".

The design of the vertical side walls of the washing compartment in the installed state in the form of a so-called "lying U" brings about the disadvantage, which is serious in terms of fastening technology, that there is no rear wall flange for absorbing any forces acting on the washing compartment, for example during transport or storage of the dishwasher. Thus, usually a second frame part must be attached as a fastening and power transmission element in the rear area of the dishwasher. This second frame part creates additional manufacturing and assembly costs.

The publication DE 75 16 419 U1 discloses a container, in particular for a dishwasher which can be loaded from the front, with a container section which is preferably formed by expanding an annular sheet metal jacket and comprises a trough-shaped bottom, side walls and ceiling and is closed by a wall attached to its rear side. The container section is composed of two sheet metal blanks of different widths, the wider of which forms the bottom and the narrower the side walls and the ceiling.

Over the years it has been shown that the construction of an expander for the production of an at least partially expanded rinsing container is very development-intensive and therefore more expensive than average. Furthermore, such an expander is also extremely maintenance-intensive and therefore cost-intensive in operation and almost susceptible to unplanned downtimes.

The publication DE 10 2010 029 763 A1 discloses a device for a rinsing container of a dishwasher, in particular a household dishwasher, which is provided for receiving items to be washed during a wash cycle and has a rinsing pan, in particular made of plastic, on an underside. The device has a sheet metal part for at least partially covering a top of the washing tub.

The publication EP 1 609 403 B1 discloses a dishwasher rinse tank comprising an upper plate, a lower plate attached below the upper plate and a middle plate connected perpendicularly between the upper plate and the lower plate. The upper plate, the middle plate and the lower plate have corner welding sections whose inner bend radii are made smaller than the outer bend radii of the corner weld sections.

The DE 10 2011 088 129 A1 discloses a dishwasher, in particular a domestic dishwasher, with a washing container which comprises a plurality of wall parts and which is provided with a loading opening on the front for loading items to be washed, which can be at least temporarily closed by a container door, the right side wall, the ceiling and the left side wall comprising a hood Form metal, which in the stretched state formed a preferably flat press part and was then bent into a U-shape, wherein a trough-shaped base made of metal is a deep-drawn part made of steel, with the metal hood and the trough-shaped bottom made of metal attached to the rear Rear wall made of metal is designed as a preferably flat press part and the two side walls of the hood made of metal are connected to each other at their lower wall edge with the trough-shaped bottom made of metal.

The publication DE 10 2007 041 314 A1 discloses a water-carrying household appliance, in particular a dishwasher or a washing machine, at least having a washing container for holding items to be washed, which is formed at least in sections from metallic materials, in particular from stainless steel. The rinsing tank is made of at least two different metallic materials. One of the metallic materials can be an austenitic metal or a ferritic metal.

The publication DE 10 2011 017 635 A1 discloses a water-carrying household appliance, in particular a dishwasher, with a washing container, the container walls and / or a door of which delimit a washing compartment. At least one of the container walls and / or the inner wall of the door facing the wash cabinet is in each case a composite component which is constructed from a support made of sheet metal material which is particularly susceptible to corrosion and a corrosion protection layer applied to the side of the support facing the wash cabinet. The container walls can be connected by a force-fit and / or positive connection, in which facing connection flanges of the container walls can be connected to each other by sheet metal forming, in particular by folding and / or flanging.

Against this background, an object of the present invention is to provide a dishwasher, in particular a domestic dishwasher, with a noticeably improved washing container.

To achieve the object according to the invention, a dishwasher, in particular a domestic dishwasher, with a washing container which comprises a plurality of wall parts and which is provided with a loading opening on the front for loading washware and which can be closed at least temporarily by a container door, is proposed. The right side wall made of metal, the ceiling made of metal and the left side wall made of metal form a hood of the washing container made of metal, which in the stretched state formed a preferably flat press part and was then bent into a U-shape. Furthermore, a trough-shaped metal base is a deep-drawn part made of a preferably austenitic steel and the metal rear wall attached to the hood and to the trough-shaped metal base is designed as a preferably flat press part. The two side walls of the hood made of metal are also connected to each other at their lower wall edge with the trough-shaped bottom made of metal. The two side walls of the hood made of metal are positively connected to one another at their lower wall edge with the trough-shaped bottom made of metal by means of external interfaces. Furthermore, the external interface includes a positive connection, in particular a dynamic or static fold. And the two external interfaces, the hood made of metal and the trough-shaped base made of metal have a 90 ° bend to the outside in their rear areas, so that a peripheral edge area is created. is attached to the rear wall made of metal.

The dishwasher according to the invention, in particular household dishwashing machine, with such a washing container, the two side walls of metal, together with the metal ceiling connecting them, are arranged as a metal hood in the form of a so-called "standing U", is characterized by simpler, more flexible and cheaper manufacturing plants due to the possible use of press and tool technology. In direct comparison with the usual expander technology, this results in a significant cost advantage in the investment. The manufacture of the production systems is also simpler and therefore less expensive. With regard to the manufacturing quality, a better tolerance compensation of the wall parts is possible in comparison with a "lying U" as a known basic rinse tank shape.

Since only the trough-shaped bottom made of metal is a deep-drawn part, there are also less material costs in direct comparison with a "lying U" than the known basic rinse tank shape. With a "lying U", the metal ceiling is also a deep-drawn part, which ultimately means more waste on sheet metal.

In addition, the well-known and well-proven rear wall flange is retained from the expander technology. This results in better integration options in existing platform concepts, and proven add-on components for the dishwasher, such as a heat exchanger, side walls or the like, can be largely identical and fully adopted from previous designs.

In addition, a ferritic steel in accordance with WNr. Can be used for the metal hood and the metal rear wall of the washing compartment. 1.4016, which is inexpensive and easy to process, can be used.

Due to the use of a rear wall made of metal, which is preferably designed as a flat press part, a second frame part as a fastening and power transmission element in the rear area of the dishwasher can be dispensed with entirely, thus saving material costs.

The trough-shaped bottom made of metal can also be made of a ferritic steel. In this case, however, the sealing bed between the hood and the trough-shaped base must be optimized with regard to corrosion, for example by using a plastic frame between the trough-shaped base made of ferritic steel on the one hand and the hood made of metal and the rear wall made of metal on the other. Such a plastic frame is, for example, from the publication WO 2009/003823 A2 known; the relevant disclosure content of this document is hereby made the subject of the present disclosure.

The dishwasher according to the invention with the rinsing container concept described thus offers the possibility of combining the advantages of an expander technology with "standing U", a "lying U" hood technology and a "standing U" hood technology in a positive and profitable manner.

The term "frame" is still used in specialist circles. In the context of this disclosure, the term “frame” is understood to mean an assembly formed at least from the hood and the trough-shaped base.

The external connection of the two side walls of the hood made of metal with the trough-shaped bottom made of metal provides the advantage of a connection facing away from the washing container with only a small, preferably no, exposure to washing liquid. On the other hand, a positive connection is advantageous with regard to tightness and effective service life of the fluid-tight connection.

The form-fitting connection, in particular the dynamic or static fold, at the external interface is characterized by a high degree of tightness and stability over time.

Folding is a technique in sheet metal processing in which a sheet edge is bent to stiffen the edge. As a combined process, flanging can also be used to create a connection from several components by forming. Components made of the same or different materials can be connected, such as sheet metal with plastics. If roller systems, preferably guided by standard industrial robot systems, are used for folding, then one speaks of roller folds or dynamic folding. If, on the other hand, static tools are used for folding, then one speaks of static folding.

The 90 ° bend to the outside gives the two external interfaces a high degree of strength and stability at comparatively low manufacturing costs. According to a first embodiment, the two external interfaces in their front areas, that is to say the areas facing the container door of the dishwasher, at least in sections have a radius of at least 80 mm to the outside, preferably at least 100 mm to the outside, and / or in their rear areas, that is, the areas facing away from the container door of the dishwasher have a straight or approximately straight outlet. The areas with the radii mentioned represent so-called folding ramps, which bring about an expansion of the clear dimension of the washing container, so that further components and assemblies find an installation space in the front area of the washing container.

According to a second embodiment, the metal rear wall attached to the hood and to the trough-shaped metal base is attached in a liquid-tight manner in the region of the contacting edge regions by means of at least one sealant, in particular glued and / or preferably spot-welded. In general, the sealant can comprise a silicone material or a pressure sensitive adhesive. Silicone materials, including silicones, is a term for a group of synthetic polymers in which silicon atoms are linked via oxygen atoms. Such a considerate attachment of the rear wall made of metal to the hood made of metal and to the trough-shaped bottom made of metal is known for example from the publication DE 10 2009 001 896 A1 and the publication DE 10 2009 001 897 A1 known; the relevant disclosure content of these two documents is hereby made the subject of the present disclosure. If the metal rear wall is glued on, the sealant preferably comprises a pressure sensitive adhesive. By definition, a pressure-sensitive adhesive is a permanent adhesive that sticks to a variety of surfaces in the dry state at room temperature after light pressure, can be peeled off and re-glued elsewhere.

According to a further embodiment, the hood made of metal is provided on the front side with a U-shaped frame part which is open at the bottom and forms a front surface of the washing compartment and which is preferably connected to the hood made of metal, preferably by means of rivets, in particular thermal rivets, which is connected in the trough-shaped metal bottom engages and which receives the door seal in a groove-shaped contour. Such a frame part is for example from the publication WO 2007/048697 A1 known; the related one Disclosure content of this document is hereby made the subject of the present disclosure. The frame part preferably comprises a plastic, in particular a glass fiber-reinforced polypropylene, and is attached at least to the hood of the metal washing-up container by means of thermal riveting technology. The same frame part can also be used for flushing containers with a trough-shaped metal base or flushing containers with a trough-shaped plastic base.

According to a further embodiment, the frame part, which preferably comprises at least one plastic, forms a front surface of the interior of the washing compartment, so that the hood of the metal washing compartment is partially covered on the inside of the frame part and the washing compartment experiences a high degree of tightness.

According to a further embodiment, the heights of the two side walls made of metal, the rear wall made of metal and the frame part are selected such that the dishwasher has a device height in the range of about 86.5 cm, about 81.5 cm, about 77.5 cm, about 60 cm or about 45 cm. At the specified device heights, the dishwasher has no worktop on the top. An increasing average size of people, a growing sensitivity to postural damage and painful damage to the human back are causing the trend towards high dishwashers to rise steadily. Different device heights over 80 cm guarantee individual application options in the built-in and under-counter segment. A dishwasher with a device height of 81.5 cm has a body size, by definition the base cabinet height minus the base height, between 655 and 725 mm and is height adjustable between 815 and 875 mm. In contrast, a dishwasher with a device height of 86.5 cm has a working height of 90 / 91cm and a body size between 705 and 775 mm and is height adjustable between 865 and 925 mm. A built-in dishwasher has a height of 45.4 cm or 59.5 cm, while a table-top dishwasher has a height of 45 cm. With a dishwasher, which is based on the washing container concept according to the invention, all of the device heights specified can be implemented inexpensively and in a highly flexible manner.

According to a further embodiment, the hood which forms the right side wall is made of metal, the ceiling is made of metal and the left side wall is made of metal Metal an austenitic steel according to WNr. 1.4301 or a ferritic steel according to WNr. 1.4016 includes. Both types of steel are available at low cost and are extremely easy to process.

According to a further embodiment, the trough-shaped base made of metal comprises an austenitic steel in accordance with WNr because of the required formability and the corrosion requirements. 1.4301.

According to a further embodiment, the trough-shaped base made of metal carries a pump bowl on the underside, preferably at least indirectly, by means of at least one sealant on an annular collar formed in the trough-shaped bottom made of metal, the annular collar having an annular angle of 1 to 10 °, preferably 2 to 5 °, in particular of about 3 °. The top of the pump pot is covered by a sieve, the sieve being at least positionable in a sieve collar made of metal in the trough-shaped bottom with a sieve angle of 2 to 10 °, preferably 4 to 8 °, in particular approximately 5 °. Due to these angular ranges, a permanent system tightness can be guaranteed without further measures.

The dishwasher can in particular be a household dishwasher.

Further possible implementations of the invention also include combinations of features or embodiments described above or below with reference 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 explained in more detail below on the basis of preferred embodiments with reference to the attached figures.

Fig. 1

eine schematische perspektivische Ansicht einer bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von schräg vorne;

Fig. 2

eine schematische perspektivische Ansicht der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1 von schräg hinten;

Fig. 3

eine schematische Explosionszeichnung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 4A

eine perspektivische Schnittdarstellung in Breitenrichtung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 2;

Fig. 4B

eine Detaildarstellung der perspektivischen Schnittdarstellung entlang der Breitenrichtung des Spülbehälters der bevorzugten Ausführungsform der erfindungsgemäßen Geschirrspülmaschine von Fig. 4A;

Fig. 5A

eine perspektivische Schnittdarstellung in Tiefenrichtung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 5B

eine Detaildarstellung der perspektivischen Schnittdarstellung in Tiefenrichtung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 5A;

Fig. 6

eine Detaildarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 2;

Fig. 7

eine Detaildarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 8

eine Detaildarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 2;

Fig. 9

einen Ausschnitt einer horizontalen Schnittdarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 10

einen Ausschnitt einer Schnittdarstellung in Tiefenrichtung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 11

einen Ausschnitt einer horizontalen Schnittdarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 12A

eine weitere schematische perspektivische Ansicht einer bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 12B

eine Detaildarstellung der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 12A;

Fig. 13 bis Fig. 16

schematische Perspektivdarstellungen der aufeinanderfolgenden Herstellungsschritte der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 17A bis Fig. 17D

schematische Perspektivdarstellungen der aufeinanderfolgenden Herstellungsschritte der Verbindung Haube-Boden-Rückwand der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 18

eine schematische perspektivische Ansicht des muldenförmigen Bodens aus Metall der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 1;

Fig. 19

einen Ausschnitt einer Schnittdarstellung des muldenförmigen Bodens aus Metall der bevorzugten Ausführungsform des Spülbehälters der erfindungsgemäßen Geschirrspülmaschine von Fig. 18; und

Fig. 20A bis Fig. 20C

schematische Ansichten von unterschiedlichen Ausführungsformen von erfindungsgemäßen Geschirrspülmaschinen.

Show it

Fig. 1

a schematic perspective view of a preferred embodiment of the washing container of the dishwasher according to the invention obliquely from the front;

Fig. 2

a schematic perspective view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 from diagonally behind;

Fig. 3

a schematic exploded view of the preferred embodiment of the washing container of the dishwasher of the invention Fig. 1 ;

Figure 4A

a perspective sectional view in the width direction of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 2 ;

Figure 4B

a detailed view of the perspective sectional view along the width direction of the washing container of the preferred embodiment of the dishwasher according to the invention of Figure 4A ;

Figure 5A

a perspective sectional view in the depth direction of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 ;

Figure 5B

a detailed view of the perspective sectional view in the depth direction of the preferred embodiment of the washing container of the dishwasher according to the invention of Figure 5A ;

Fig. 6

a detailed view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 2 ;

Fig. 7

a detailed view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 ;

Fig. 8

a detailed view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 2 ;

Fig. 9

a section of a horizontal sectional view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 ;

Fig. 10

a section of a sectional view in the depth direction of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 ;

Fig. 11

a section of a horizontal sectional view of the preferred embodiment of the washing container of the dishwasher according to the invention of Fig. 1 ;

Figure 12A

another schematic perspective view of a preferred embodiment of the washing container of the dishwasher according to the invention from Fig. 1 ;

Figure 12B

a detailed view of the preferred embodiment of the washing container of the dishwasher according to the invention of Figure 12A ;

13 to 16

schematic perspective views of the successive manufacturing steps of the preferred embodiment of the washing container of the inventive dishwasher of Fig. 1 ;

17A to 17D

schematic perspective views of the successive manufacturing steps of the connection hood-floor-rear wall of the preferred embodiment of the washing container of the inventive dishwasher of Fig. 1 ;

Fig. 18

is a schematic perspective view of the trough-shaped bottom made of metal of the preferred embodiment of the washing container of the dishwasher according to the invention from Fig. 1 ;

Fig. 19

a section of a sectional view of the trough-shaped bottom made of metal of the preferred embodiment of the washing container of the dishwasher according to the invention from Fig. 18 ; and

20A to 20C

schematic views of different embodiments of dishwashers according to the invention.

In the figures, elements that are the same or have the same function have been provided with the same reference symbols, unless stated otherwise.

The Fig. 1 shows a schematic perspective view of a washing container 2 of a dishwasher 1, in particular a household dishwasher, from obliquely in front.

The rinsing container 2 comprises a plurality of wall parts 3 to 7 and is provided with a loading opening B on the front for loading items to be washed, which opening does not have a through opening Container door shown, but known to the person skilled in the art, can be closed at least temporarily. The right side wall 3 made of metal, the ceiling 4 made of metal and the left side wall 5 made of metal as wall parts form a hood 8 made of metal, which in the stretched state formed a flat press part and was then bent into a U-shape. A trough-shaped base 6 made of metal as a further wall part is made of an austenitic steel according to WNr. 1.4301 manufactured deep-drawn part. On the hood 8 made of metal and on the trough-shaped bottom 6 made of metal, a rear wall 7 made of metal is attached on the back, which is designed as a preferably flat press part.

The trough-shaped base 6 made of metal can, however, also be made of a ferritic steel. In this case, however, the sealing bed between the hood and the trough-shaped base must be optimized with regard to corrosion, for example by using a plastic frame between the trough-shaped base made of ferritic steel on the one hand and the hood made of metal and the rear wall made of metal on the other.

The hood 8 made of metal, which is formed from the right side wall 3 made of metal, the ceiling 4 made of metal and the left side wall 5 made of metal, thus forms the so-called "standing U's".

Furthermore, the hood 8 made of metal is provided on the front with a U-shaped frame part 9 which is open at the bottom and forms a front surface F of the washing compartment 2. The frame part 9 is connected to the hood 8 made of metal by means of rivets, in particular thermal rivets (see also Fig. 6 and Fig. 9 ) and engages in the trough-shaped base 6 made of metal (see also Fig. 8 ). In addition, the frame part 9 has a circumferential groove-shaped contour 10 on the front (see Fig. 9 ) which accommodates a door seal known to the person skilled in the art, and it preferably comprises a plastic, in particular a glass fiber reinforced polypropylene.

The Fig. 2 shows a schematic perspective view of the washing compartment 2 of the dishwasher 1 of FIG Fig. 1 from diagonally behind.

The essential metallic wall parts of the washing compartment 2, that is to say the two side walls 3, 5 made of metal, the ceiling 4 made of metal, the trough-shaped are clearly shown Bottom 6 made of metal and the rear wall 7 made of metal. The shape of the hood 8 made of metal, a “standing U”, and the frame part 9 are also clearly recognizable.

The Fig. 3 shows a schematic exploded view of the washing container 2 of the dishwasher 1 of FIG Fig. 1 .

The essential metallic wall parts of the washing compartment 2 are the hood 8 made of metal, the trough-shaped bottom 6 made of metal, the rear wall 7 made of metal and the frame part 9, the hood 8 made of metal from the two side walls 3, 5 made of metal and the ceiling 4th is made of metal and forms the shape of a "standing U's". The hood 8 made of metal and the trough-shaped base 6 made of metal have a 90 ° bend 11 to the outside in their rear areas.

The Figure 4A shows a perspective sectional view in the width direction BR (double arrow) of the washing container 2 of the dishwasher 1 of FIG Fig. 2 .

The hood 8 of the washing container 2 made of metal is formed from the two side walls 3, 5 made of metal and the ceiling 4 made of metal and forms the shape of a "standing U's". The trough-shaped base 6 made of metal is arranged on the underside of the metal hood 8 and the frame part 9 is arranged on the front of the metal hood 8.

The Figure 4B shows a detailed illustration of the perspective sectional illustration along the width direction BR (double arrow) of the washing compartment 2 of the dishwasher 1 of FIG Figure 4A .

The two side walls 3, 5 of the hood 8 made of metal are positively connected to each other at their lower wall edge 3.U, 5.U with the trough-shaped bottom 6 made of metal by means of external interfaces 12.R, 12.L. The respective external interface 12. R, 12. L comprises a positive connection 13, in particular a dynamic or static fold, or a roller seam weld. In the illustrated embodiment, the positive connection 13 comprises a fold. Folding is a technique in sheet metal processing in which a sheet edge is bent to stiffen the edge. On the other hand, roller seam welding is a process of resistance welding and directly from Spot welding derived. Both manufacturing processes are suitable for the liquid-tight connection of the hood 8 of the washing container 2 made of metal with the trough-shaped bottom 6 of the washing container made of metal.

The Figure 5A shows a perspective sectional view in the depth direction TR (double arrow) of the washing container 2 of the dishwasher 1 of FIG Fig. 1 .

The hood 8 of the washing container 2 made of metal is formed from the two side walls 3, 5 made of metal and the ceiling 4 made of metal and forms the shape of a "standing U's". The trough-shaped base 6 made of metal is arranged on the underside of the metal hood 8 and the frame part 9 is arranged on the front of the metal hood 8. The rear wall 7 made of metal attached to the hood 8 made of metal and to the trough-shaped bottom 6 made of metal is attached, in particular glued and / or preferably spot-welded, in a liquid-tight manner in the region of the contacting edge regions 14 by means of at least one sealant.

The Figure 5B shows a detailed illustration of the perspective sectional illustration in the depth direction TR (double arrow) of the washing compartment 2 of the dishwasher 1 of FIG Figure 5A .

The trough-shaped base 6 made of metal has a 90 ° bend 11 to the outside in its rear region. The rear wall 7 made of metal, which is attached to the rear of the hood (not shown) and to the trough-shaped bottom 6 of metal, is liquid-tightly attached, in particular glued and / or preferably spot-welded, in the region of the contacting edge regions 14 by means of at least one sealant. The sealant comprises, for example, a silicone material or a pressure sensitive adhesive.

The Fig. 6 shows a detailed view of the washing container 2 of the dishwasher 1 from Fig. 2 .

The U-shaped frame part 9, which is open at the bottom and forms a front surface F of the washing compartment 2, is attached to the front of the hood 8 made of metal and connected to the hood 8 made of metal in a form-fitting and liquid-tight manner by means of rivets, in particular thermal rivets. The liquid-tight connection can, for example generated and guaranteed by using TPE or similar sealants.

The Fig. 7 shows a detailed view of the washing container 2 of the dishwasher 1 from Fig. 1 .

The hood 8 made of metal and the trough-shaped base 6 made of metal have a 90 ° bend 11 to the outside in their rear areas. The rear wall 7 made of metal is attached to this respective 90 ° bend 11 in a liquid-tight manner in the region of the contacting edge regions 14 by means of at least one sealant, the rear wall 7 made of metal having a preferably circumferential projection 15.

The Fig. 8 shows a detailed view of the washing container 2 of the dishwasher 1 from Fig. 2 .

The hood 8 made of metal is provided on the front side with the U-shaped frame part 9 which is open at the bottom and forms the front surface F of the washing compartment 2 and which engages in the trough-shaped bottom 6 made of metal.

The Fig. 9 shows a section of a horizontal sectional view of the washing container 2 of the dishwasher 1 of FIG Fig. 1 .

The U-shaped frame part 9, which is open at the bottom and forms the front surface F of the washing compartment 2, is connected to the hood 8 made of metal at the front in a form-fitting and liquid-tight manner. Furthermore, the frame part 9, which preferably comprises a plastic, in particular a glass-fiber-reinforced polypropylene, is provided on the front with a circumferential groove-shaped contour 10 which accommodates a door seal which is not shown but is known to the person skilled in the art.

The Fig. 10 shows a section of a sectional view in the depth direction TR (double arrow) of the washing compartment 2 of the dishwasher 1 of FIG Fig. 1 .

The hood 8 made of metal, that is to say the ceiling 4 made of metal, has a 90 ° bend 11 toward the outside in its rear region.

The Fig. 11 shows a section of a horizontal sectional view of the washing container 2 of the dishwasher 1 of FIG Fig. 1 .

The hood 8 made of metal, that is the right side wall 3 shown made of metal, and the right interface 12.R on the right side wall 3 made of metal have a 90 ° bend 11 to the outside in their rear areas. In their front areas, at least in sections, they have a radius R of at least 80 mm to the outside, preferably at least 100 mm to the outside. In professional circles, this radius R is also referred to as the folding ramp.

The Figure 12A shows a further schematic perspective view of the washing compartment 2 of the dishwasher 1 of FIG Fig. 1 .

The ultimately circumferential metallic wall parts of the washing compartment 2, i.e. the two side walls 3, 5 made of metal, the ceiling 4 made of metal and the trough-shaped bottom 6 made of metal, including the interfaces 12.R, 12.L, face in front of their respective 90 ° Bending 11 in the connected state in its rear areas a straight or approximately straight outlet 16.

The Figure 12B shows a detailed view of the washing container 2 of the dishwasher 1 from Figure 12A .

The straight or approximately straight outlet 16 extends in the rear interfaces 12.R, 12.L in front of the rear 90 ° bend 11 of the hood 8 made of metal and the trough-shaped bottom 6 made of metal connected to it.

The 13 to 16 show schematic perspective representations of the successive manufacturing steps of the washing container 2 of the dishwasher 1 of FIG Fig. 1 .

In a first manufacturing step ( Fig. 13 ) the frame part 9 is connected to the hood 8 made of metal in a form-fitting and liquid-tight manner, forming the shape of a "standing U". The hood 8 made of metal is made of the two side walls 3, 5 made of metal and the ceiling 4 made of metal, which in the stretched state formed a preferably flat press part and was then bent into a U-shape.

In a second manufacturing step ( Fig. 14 ) the trough-shaped bottom 6 made of metal is connected to the hood 8 made of metal together with the frame part 9 in a form-fitting manner. The trough-shaped base made of metal is a deep-drawn part made of a preferably austenitic steel. The positive connection takes place on the respective lower wall edge 3.U, 5.U of the side walls 3, 5 made of metal, the hood 8 made of metal with the trough-shaped bottom 6 made of metal by means of external interfaces 12.R, 12.L. The connection itself comprises a positive connection, in particular a dynamic or static fold, or a roller seam weld.

In a further manufacturing step ( Fig. 15 ) On the one hand, the assembly formed from the hood 8 made of metal, the frame part 9 and the trough-shaped bottom 6 made of metal is provided with a 90 ° bend 11 in its rear region. On the other hand, the rear wall 7 made of metal is provided in necessary areas 14 by means of a sealant, for example a silicone material or a pressure sensitive adhesive.

And in a fourth manufacturing step ( Fig. 16 ) the rear wall 7 made of metal is attached to the hood 8 made of metal and on the trough-shaped bottom 6 made of metal by means of at least one sealant in a liquid-tight manner in the area of the contacting edge areas 14, in particular glued and / or preferably spot welded.

Of course, the manufacture of the washing compartment 2 of the dishwasher 1 can also comprise further manufacturing steps, which are not explicitly shown but are known to the person skilled in the art.

The 17A to 17D show schematic perspective representations of the successive production steps of the connections hood-bottom-rear wall of the washing container 2 made of metal of the dishwasher 1 of FIG Fig. 1 .

In a first manufacturing step ( Figure 17A ) the connection hood-floor-rear wall of the washing container 2 made of metal of the dishwasher 1, the components Hood 8 made of metal and base 6 made of metal in at least one respective tool. Ultimately, the respective geometry is created by the connection with one another.

In a second manufacturing step ( Figure 17B ) the connection hood-floor-rear wall of the washing container 2 made of metal of the dishwasher 1, the components hood 8 made of metal and floor 6 made of metal are connected to one another in a form-fitting and liquid-tight manner at interfaces 12.R, 12.L, preferably by means of folding.

In a further manufacturing step ( Figure 17C ) the connection hood-floor-rear wall of the washing container 2 made of metal of the dishwasher 1, the components hood 8 made of metal and base 6 made of metal connected by interfaces 12.R, 12.L are subjected to a 90 ° bend 11 in their rear areas, so that a peripheral edge region 14 is generated.

In a fourth manufacturing step ( Figure 17D ) the connection hood-floor-rear wall of the washing container 2 made of metal of the dishwasher 1, the rear wall 7 made of metal is attached to the hood 8 made of metal and to the trough-shaped bottom 6 made of metal and connected watertight. The rear wall 7 made of metal is designed as a preferably flat press part.

Of course, the production of the hood-floor-rear wall connection of the washing compartment 2 of the dishwasher 1 can also comprise further manufacturing steps which are not explicitly shown but which are known to the person skilled in the art.

The Fig. 18 shows a schematic perspective view of the trough-shaped bottom 6 of the washing container 2 made of metal of the dishwasher 1 of FIG Fig. 1 .

The trough-shaped base 6 made of metal has the described contour and any attachment areas for known, but not shown, components of a dishwasher 1, such as the pump pot, the salt container or the zeolite drying system.

The Fig. 19 shows a section of a sectional view of the trough-shaped bottom 6 of the washing container 2 made of metal of the dishwasher 1 of FIG Fig. 18 .

The trough-shaped base 6 made of metal preferably carries, indirectly and underneath, a pump cup 17, not explicitly shown, by means of at least one sealant, such as a known pump cup seal, liquid-tight on an annular collar 18 formed in the trough-shaped bottom 6, the ring collar 18 has an annular angle 18. W from 1 to 10 °, preferably from 2 to 5 °, in particular from about 3 °.

Furthermore, the pump bowl 17 is covered on the upper side by a sieve 19 which is not explicitly shown. This sieve 18 can at least be positioned in a sieve collar 20 made of metal in the trough-shaped bottom 6 with a sieve angle 20.W of 2 to 10 °, preferably 4 to 8 °, in particular approximately 5 °.

The 20A to 20C show schematic views of different embodiments of dishwashers 1.

The dishwashers 1 shown represent different types of devices Figure 20A Dishwasher 1 shown is a large appliance (free-standing, built-under or fully integrable) with an appliance height H in the range of approximately 86.5 cm, approximately 81.5 cm or approximately 77.5 cm. However, it is in the Figure 20B Dishwasher 1 shown is a built-in dishwasher with a device height H of 45.4 cm or 59.5 cm. And the one in the Figure 20C Dishwasher shown with a device height H of 45 cm can be used as a table-top dishwasher.

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

Reference symbols used

1

Dishwasher; Household dishwasher

2nd

Rinsing tank

3rd

Right side wall; Wall part

3.U

Lower wall edge of the right side wall

4th

Ceiling; Wall part

5

Left side wall; Wall part

5.U

Lower wall edge of the left side wall

6

ground

7

Back wall

8th

Hood

9

Frame part

10th

Grooved contour

11

Folding

12.R

Right interface

12.L

Left interface

13

Positive-locking connection

14

Edge area

15

Got over

16

Spout

17th

Pump pot

18th

Ring collar

18.W

Ring angle

19th

Sieve

20th

Screen collar

20.W

Screen angle

B

Loading opening

BR

Width direction (double arrow)

H

Device height

F

Front surface

R

Radius; Folding ramp

TR

Depth direction (double arrow)

Claims (10)

1. Dishwasher (1), in particular a household dishwasher, having a dishwashing compartment (2) which comprises a plurality of wall parts (3, 4, 5, 6, 7) and, in order to be loaded with items to be washed, is provided on the front side with a loading opening (B) which can be closed, at least temporarily, by a compartment door, wherein the right-hand side wall (3), the ceiling (4) and the left-hand side wall (5) form a metal shroud (8) which in the straightened-out state formed a preferably flat press part and was then bent in a U-shaped manner, wherein a hollowed metal floor (6) is a deep-drawn part produced from a preferably austenitic steel, wherein the metal rear wall (7) which is fitted to the rear side of the metal shroud (8) and of the hollowed metal floor (6) is designed in the form of a preferably flat press part, wherein the two side walls (3, 5) of the metal shroud (8) are connected along their respectively lower wall edge (3.U, 5.U) to the hollowed metal floor (6), characterised in that the two side walls (3, 5) of the metal shroud (8) are connected along their respectively lower wall edge (3.U, 5.U), in a form-fitting manner, to the hollowed metal floor (6) by means of external interfaces (12.R, 12.L), that the respective external interface (12.R, 12.L) comprises a form-fitting connection (13), in particular a dynamic or static fold, and that the two external interfaces (12.R, 12.L), the metal shroud (8) and the hollowed metal floor (6) in their regions on the rear side have an outward 90° bend (11), so that a peripheral edge region (14) is produced, to which the metal rear wall (7) is fitted.
2. Dishwasher (1) according to claim 1, characterised in that the two external interfaces (12.R, 12.L) in their regions on the front side at least in sections have a radius (R) of at least 80 mm outwardly, preferably of at least 100 mm outwardly, and/or in their regions on the rear side a linear or an approximately linear path (16).
3. Dishwasher (1) according to claim 1 or 2, characterised in that the metal rear wall (7) fitted on the rear side to the metal shroud (8) and to the hollowed metal floor (6) is attached by means of at least one sealing means in a fluid-tight manner in the region of the edge regions (14) in contact with one another, in particular is adhesively bonded thereon and/or preferably spot-welded.
4. Dishwasher (1) according to claim 3, characterised in that the sealing means comprises a silicone material or a contact adhesive.
5. Dishwasher (1) according to one of the preceding claims, characterised in that the metal shroud (8) is provided on the front side with a U-shaped frame part (9) which is downwardly open and forms a front surface (F) of the dishwashing compartment (2), which is preferably connected by means of riveting, in particular thermal riveting, to the metal shroud (8) preferably in a form-fitting manner, which frame part engages in the hollowed metal floor (6) and which frame part receives the door seal in a grooveshaped contour (10).
6. Dishwasher (1) according to claim 5, characterised in that the frame part (9) which preferably comprises at least one plastic forms a front surface (F) of the interior of the dishwashing compartment (2).
7. Dishwasher (1) according to one of the preceding claims, characterised in that the heights of the two side walls, the metal rear wall (7) and the frame part (9) are selected such that the dishwasher (1) has an appliance height (H) in the region of approximately 86.5 cm, approximately 81.5 cm, approximately 77.5, approximately 60 cm or approximately 45 cm.
8. Dishwasher (1) according to one of the preceding claims, characterised in that the metal shroud (8) forming the right-hand side wall (3), the ceiling (4) and the left-hand side wall (5) comprises an austenitic steel according to WNr. 1.4301 or a ferritic steel according to WNr. 1.4016.
9. Dishwasher (1) according to one of the preceding claims, characterised in that the hollowed metal floor (6) comprises an austenitic steel according to WNr. 1.4301.
10. Dishwasher (1) according to one of the preceding claims, characterised in that the hollowed metal floor (6) on the lower side preferably indirectly carries a pump well (17), in a fluid tight manner on an annular collar (18) configured in the hollowed metal floor (6), wherein the annular collar (18) has a ring angle (18.W) of 1 to 10°, preferably of 2 to 5°, in particular of approximately 3°, and in that the pump well (17) on the upper side is covered by a filter (19), wherein the filter (19) is at least positionable in a filter collar (20) which is configured in the hollowed metal floor (6), and which has a filter angle (20.W) of 2 to 10°, preferably of 4 to 8°, in particular of approximately 5°.

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