Dishwasher, in particular domestic dishwasher

Abstract

The invention relates to a dishwasher (1), in particular a domestic dishwasher, at least comprising a washing container (2) for receiving items to be washed, said washing container comprising multiple wall parts (7 to 11), preferably consisting of metal, and being provided with a supply opening (6), which can be at least temporarily closed by a container door (3), for supplying items to be washed, wherein at least the right-hand side container lateral wall (11), the container lid (8), and the left-hand side container lateral wall (10) form a container hood (15), and the container hood and at least the trough-shaped container base (7) form a container frame (16). The container rear wall (9) is attached, in particular welded, to the rear face of the container frame (16), and the container rear wall (9) comprises at least two container rear wall elements (9.1, 9.2), preferably at least three container rear wall elements (9.1, 9.2, 9.3), in particular at least four container rear wall elements (9.1 to 9.4), in particular flat container rear wall elements, which are connected, in particular welded, to the at least one adjacent container rear wall element (9.1, 9.2; 9.1, 9.2, 9.3;9.1 to 9.4) at least in some sections along a connection region (VB), in particular a connection line (VL), by means of at least one joining method.

Description

[0001] Dishwasher, especially household dishwasher

[0002] The invention relates to a dishwasher, in particular a household dishwasher, with a washing container which comprises a plurality of wall parts and which is provided at the front with a loading opening for loading with wash ware, which can be closed at least temporarily by a container door.

[0003] A known dishwasher, in particular a household dishwasher, typically has a washing container designed as a work chamber for receiving items to be cleaned, which container can be closed, in particular in a watertight manner, by a container door. The washing container is preferably cuboid-shaped and can be arranged in a housing of the dishwasher, in particular a household dishwasher. Furthermore, the washing container and the container door form a washing chamber for washing items. The container door can be closed or opened by pivoting about a pivot axis provided at a lower end of the container door. A loading opening of the washing container can be closed or opened with the aid of the container door.

[0004] Such a dishwasher, in particular a household dishwasher, is known, for example, from the document DE 10 2015216228 A1.

[0005] The dishwasher, in particular a household 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 with wash ware, which can be closed at least temporarily by a container door, wherein the right container side wall, the container ceiling and the left container side wall form a container hood made of metal which, in the stretched state, formed a preferably flat pressed part and was then bent into a U-shape, wherein a trough-shaped container base made of metal is a deep-drawn part made of a preferably austenitic steel and wherein the container rear wall made of metal which is attached to the rear of the container hood made of metal and to the trough-shaped container base made of metal is designed as a preferably flat pressed part.The two container side walls of the metal container hood can be connected to the trough-shaped metal container base at their respective lower wall edges, preferably in a form-fitting manner, by means of external interfaces. Furthermore, the respective external interface can comprise a form-fitting connection, in particular a dynamic or static fold, or a roll seam weld.

[0006] The document EP 2 185 057 B1 discloses a dishwasher, at least comprising a washing container for holding wash ware, which is formed at least partially from metallic materials, in particular from stainless steel, wherein the washing container is made from at least two different metallic materials. In the regions of the washing container in which particularly severe deformation is provided and / or weld seams are applied, the metallic material is an austenitic metal, wherein such regions of the washing container are a section of the outer plate of the washing container facing the front side of a shell plate of the washing container and a container base plate of the washing container.Furthermore, in the areas of the rinsing tank which are not subjected to such severe deformation or are not welded, the metallic material is a ferritic metal, such an area of ​​the rinsing tank being a section of the rinsing tank's shell plate facing away from the front side of the rinsing tank's shell plate.

[0007] The document DE 6924403 U discloses a washing tub for a dishwasher with interconnected tub base, top, and side walls made of sheet metal. Each side wall is connected to the tub base and top walls by flanging the adjacent edges. The vertical side walls, made of a single piece of sheet metal, thus form a so-called "horizontal U" shape when installed.

[0008] The document DE 80 31 660 U1 also discloses a washing tub for a dishwasher with interconnected tub base, ceiling, and side walls made of sheet metal. Each side wall is connected to the tub base and ceiling by flanging the adjacent edges. Thus, the three vertical side walls made of a single piece of sheet metal also form the shape of a so-called "horizontal U" when installed. The design of the vertical side walls of the washing tub in the shape of a so-called "horizontal I" when installed has the serious disadvantage in terms of fastening technology that there is no rear wall flange to absorb any forces acting on the washing tub, for example during transport or storage of the dishwasher. Thus, a second frame part must usually be attached to the rear area of ​​the dishwasher as a fastening and force transmission element.This second frame part results in additional manufacturing and assembly costs.

[0009] In the conventional dishwasher wash tubs, the materials used can lead to corrosion from non-draining wash liquor, particularly rinse water, in small gaps, such as between the tub bottom and the tub back wall, severely deformed geometries, complex interfaces with adjacent components, and thermal joining techniques such as roll seam welding. The development of corrosion can significantly shorten the service life of the dishwasher, not least due to a possible leak. It can negatively impact the quality of the wash liquor and can lead to visible discoloration within the wash tub, in the worst case, on the washware.

[0010] Against this background, it is an object of the present invention to provide a dishwasher, in particular a household dishwasher, with an improved washing container.

[0011] To achieve the object of the invention, a dishwasher, in particular a household dishwasher, comprising a washing container for holding wash ware, which comprises a plurality of wall parts preferably made of metal and which is provided with a loading opening on the front for loading wash ware, which can be closed at least temporarily by a container door, is proposed. At least the right container side wall, the container ceiling, and the left container side wall form a container hood, and the container hood and at least the trough-shaped container base form a container frame. The container rear wall is attached, in particular welded, to the rear of the container frame.Furthermore, the container rear wall comprises at least two, in particular flat, container rear wall elements, preferably at least three, in particular flat, container rear wall elements, in particular at least four, in particular flat, container rear wall elements, which are connected, in particular welded, at least in sections along a connecting region, in particular a connecting line, to the at least one adjacent container rear wall element by at least one joining method.

[0012] By providing at least two container rear wall elements, each container rear wall element can be optimally designed for the respective operational requirements, both in terms of material, treatment, surface area, arrangement, orientation, design (especially shape), and element thickness. By selecting these exemplary features, corrosion can be reliably and permanently prevented, and the functionality of the dishwasher can be continuously ensured. Furthermore, when implementing a container rear wall that comprises at least two, in particular, flat container rear wall elements, existing production and / or assembly systems can continue to be used. This creates a cost advantage for the necessary investments in machinery and equipment.And the proposed connection, in particular welding, of the container rear wall elements is known in specialist circles, so that a washing container which is leak-proof, in particular for washing liquors, for holding wash ware can be produced without any problem.

[0013] According to the invention, a container rear wall of the dishwasher's washing compartment is provided, which comprises at least two, in particular, flat container rear wall elements. Consequently, a container rear wall can also be provided that comprises three, four, or even more container rear wall elements, wherein each individual container rear wall element can have selected features, such as material, treatment, surface area, arrangement, orientation, design, in particular shape, as well as element thickness.

[0014] In tests carried out, the following exemplary container back walls have proven to be advantageous:

[0015] - a container rear wall with two flat container rear wall elements, comprising a vertically lowermost container rear wall element made of an austenitic steel and another, arranged vertically above it, in particular an upper, container rear wall element made of a ferritic steel; horizontal alignment of the two container rear wall elements with a respective wall thickness of, for example, 0.4 mm;

[0016] - a container rear wall with three flat container rear wall elements, comprising a vertically lowest container rear wall element made of austenitic steel and with a wall thickness of, for example, 0.4 mm; a first further, vertically arranged above, in particular an upper, container rear wall element made of ferritic steel with a wall thickness of, for example, 0.3 mm; and a second further, in particular a container rear wall element ("noise protection element") arranged at least partially on the outside of the first further, in particular the upper, container rear wall element, made of ferritic steel and with a wall thickness of, for example, 0.3 mm;

[0017] - a container rear wall with four flat container rear wall elements, comprising a vertically lowest container rear wall element made of austenitic steel and with a wall thickness of, for example, 0.4 mm; a first further container rear wall element ("sealing element") arranged vertically above it, made of ferritic steel and with a wall thickness of, for example, 0.3 mm; a second further container rear wall element ("noise protection element") arranged vertically above it, made of ferritic steel and with a wall thickness of, for example, 0.6 mm; and a third further container rear wall element ("second sealing element") arranged vertically above it, made of ferritic steel and with a wall thickness of, for example, 0.3 mm.

[0018] It is understood that the features mentioned are merely examples. They may, of course, vary. For example, the respective wall thickness can be between 0.25 mm and 0.60 mm.

[0019] In the context of this disclosure, the term "container hood" is understood to mean an assembly formed at least by the right container side wall, the container ceiling, and the left container side wall. Furthermore, in the context of this disclosure, the term "container frame" is understood to mean an assembly formed at least by the container hood and the trough-shaped container base. In a first embodiment, it is provided that the connecting region, in particular the connecting line, runs approximately horizontally, in particular horizontally.

[0020] Due to this course and the material selection for the vertically lowest container rear wall element, it is technically simple and cost-effective to ensure that no corrosion occurs in the critical area between the container bottom and the container rear wall, even in the presence of rinsing liquid, especially rinsing solution. An approximately horizontal, particularly horizontal, connecting area, in particular a connecting line, is present, for example, in a container-wide container rear wall element.

[0021] The vertically lowest element of the tank rear wall can, of course, also consist of a plurality of possibly different wall sub-elements. Differences may include, for example, the material, treatment, surface area, and / or element thickness.

[0022] The connecting region, in particular the connecting line, can also have an approximately vertical, in particular vertical, course, depending not least on the size and / or placement of a container rear wall element of the container rear wall. Furthermore, a combination of an approximately horizontal, in particular horizontal, running connecting region, in particular a connecting line, and an approximately vertical, in particular vertical, running connecting region, in particular a connecting line, is also possible.

[0023] In a further embodiment, it is provided that the joining method is a welding method with production of a weld seam, in particular a laser welding with production of a laser weld seam, and / or that the weld seam, in particular the laser weld seam, has a weld root, which is preferably formed on the outside of the rinsing container.

[0024] By using a welding process, especially laser welding with a laser weld seam, the tightness of the flushing tank can be achieved and permanently ensured. The most common joining methods, such as rivets, screws, and clamps, cannot permanently ensure the tightness of the flushing tank, even with the use of an additional sealant such as silicone.

[0025] This design of the weld root on the outside of the wash tub provides the advantage of very low visibility of the weld seam on the inside of the wash tub. Users loading and unloading the dishwasher can hardly detect such a weld seam with the naked eye, especially given the lighting conditions inside the wash tub. From a technological perspective, keeping the weld seam as small as possible on the inside of the wash tub is also advantageous, especially with regard to corrosion.

[0026] In a further embodiment, it is provided that the weld seam, in particular the laser weld seam, has a seam surface which is preferably formed on the inside of the rinsing container and which is post-treated, preferably passivated, in particular laser passivated.

[0027] The formation of the weld surface on the inside of the rinsing tank provides the technological advantages already mentioned. Post-treatment of the weld surface, preferably passivation, especially laser passivation, is also of considerable benefit, especially since even an initial tendency toward corrosion is effectively prevented.

[0028] In a further embodiment, it is provided that the vertically lowest container rear wall element of the container rear wall has a height in the range of 10 to 50 mm, preferably from 15 mm to 40 mm, in particular from 20 to 30 mm, from a line of contact with the trough-shaped container bottom.

[0029] The aforementioned height ranges of the vertically lowest container rear wall element of the container rear wall promote the achievement of the advantages according to the invention. This is independent of the amount of rinsing liquid, in particular rinsing solution, and the selected rinsing program. In a further embodiment, it is provided that the trough-shaped container base and the vertically lowest container rear wall element of the container rear wall are made of an austenitic steel, such as WNo. 1.4301. Austenitic steel is standardized in DIN EN ISO 3506-1, and the group of austenitic steels also includes, for example, the materials 1.4401 (X5CrNiMo17-12-2, AISI 316), 1.4404 (X2CrNiMo17-12-2, AISI 316L), and 1.4571 (X6CrNiMoTi17-12-2, AISI 316 Ti). This list of materials is merely exemplary and not exhaustive.A key property of an austenitic steel is its corrosion resistance, which is required in the context of the present invention, particularly in the critical area between the vessel bottom and the vessel rear wall. Therefore, a high-quality steel is used in this area, which meets the stringent requirements in this field.

[0030] In a further embodiment, it is provided that the at least one further container rear wall element of the container rear wall, the right container side wall, the container ceiling and the left container side wall are made of a ferritic steel, such as WNo. 1.4016, and / or that the container rear wall is welded to the rear of the container frame by means of laser welding or roll seam welding.

[0031] Ferritic steel is standardized in DIN EN 10151, belongs to the chromium steel grades, and unlike austenitic steel grades, it is highly magnetic. This is due to its body-centered, cubic crystal structure. Ferritic steel grades are used primarily in the food and beverage industry. Ferritic steel according to WNo. 1.4016 is relatively easy to process and also cost-effective. Furthermore, the steel used is resource-efficient due to the absence of nickel.

[0032] Due to this circumferential welding, the sealant previously used to seal the tank rear wall and the tank body, particularly silicone, can be completely dispensed with. Furthermore, less damage during transport is achieved, as the circumferential welding between the tank rear wall and the tank body can transfer greater forces than a spot-welded connection. Laser welding (EN ISO 4063: Process 52) is primarily used for welding components that must be joined at high welding speeds, with a narrow and slender weld seam, and with low thermal distortion. Laser welding or laser beam welding is usually performed without the addition of filler material. The laser radiation is focused using an optical system.The workpiece surface of the butt edge, i.e. the joint of the components to be welded, is located in the immediate vicinity of the focus of the optics (in the focal spot). The position of the focus relative to the workpiece surface (above or below) is an important welding parameter and also determines the welding depth. The focal spot typically has a diameter of a few tenths of a millimeter, which results in very high energy concentrations when the laser used has the typical power of several kilowatts. The absorption of the laser power causes an extremely rapid temperature rise on the workpiece surface above the melting temperature of the metal, so that a melt forms. Due to the high cooling rate of the weld seam, it becomes very hard, depending on the material, and usually loses toughness.

[0033] Roller seam welding is a resistance welding process directly derived from spot welding. The electrodes are designed as copper rollers. The rollers, which run above and below the sheets to be welded, press the sheets together and simultaneously transfer the welding current. Roller seam welding is limited to joining thin sheets. Various seam geometries, from overlap welds to butt welds, are possible. In contrast to spot welding, roller seam welding is a continuous process—at least with regard to the relative movement of the electrode and workpiece. The rollers run on the sheet and do not need to be opened for feed. This also reduces electrode wear. The weld spots are created by current pulses. The higher the pulse frequency at the same feed rate, the closer the weld spots are to one another.If the welding current flows without interruption, then sealing seams can also be created.

[0034] In a further embodiment, it is provided that the two side walls of the container hood are connected to one another at their respective lower wall edges with the trough-shaped container bottom by means of external interfaces, preferably in a form-fitting manner, in particular by a dynamic or static fold or by a roll seam weld.

[0035] Both positive connection types are characterized by a high degree of tightness and temporal stability.

[0036] Hemming is a sheet metal processing technique in which a sheet metal edge is bent over to stiffen the edge. As a combined process, flanging can also be used to create a joint between multiple components through forming. Components made of both the same and different materials can be joined, such as sheet metal with plastics. When roller systems, preferably guided by standard industrial robot systems, are used for hemming, the process is called roller hemming or dynamic hemming. If, however, static tools are used for hemming, it is called static hemming.

[0037] In a further embodiment, it is provided that the two external interfaces, the container hood and the trough-shaped container base, each have a 90° outward bend in their rear areas, i.e. the areas facing away from the container door of the dishwasher.

[0038] Such a bend gives the two external interfaces a high degree of strength and stability at comparatively low manufacturing costs.

[0039] In a further embodiment, it is provided that the container hood in the stretched state formed a preferably flat press part and was then bent into a U-shape and that the container rear wall attached to the rear of the container frame, in particular welded thereto, is designed as a preferably flat press part.

[0040] Such a rinsing tank is characterized by simpler, more flexible, and more cost-effective production facilities due to the possible use of press and tool technology. This results in a significant cost advantage in direct comparison with conventional expander technology. The production facilities are also simpler and therefore more cost-effective. In terms of manufacturing quality, better tolerance compensation of the wall components is possible compared to a "horizontal II" as the familiar basic rinsing tank shape. Since only the trough-shaped metal tank base is a deep-drawn part, material costs are also lower compared to a "horizontal II" as the familiar basic rinsing tank shape. With a "horizontal II," the metal tank lid is also a deep-drawn part, which ultimately results in more waste of sheet metal.

[0041] Furthermore, the well-known and proven container rear wall flange from expander technology remains intact. This results in better integration options into existing platform concepts; proven dishwasher add-on components, such as a heat exchanger, side panels, or the like, can be largely identically and completely adopted from previous designs.

[0042] Due to the use of a container rear wall made of metal, which is preferably designed as a flat pressed part, a second frame part as a fastening and force transmission element in the rear area of ​​the dishwasher can be completely dispensed with, thus saving material costs.

[0043] In a further embodiment, it is provided that the two side walls of the container hood are connected to one another, in particular welded to one another, at their respective lower wall edges with the trough-shaped container bottom by a joining process.

[0044] Such a joining process, in particular such a welding process, for the container hood and the trough-shaped container base is characterized in principle by a simple but very process-reliable connection.

[0045] In a further embodiment, it is provided that the container hood forms a preferably flat container shell plate in the stretched state, that the trough-shaped container base forms a preferably flat container base plate in the stretched state, that the two container plates were deformed into the container body in an expander after they were connected, in particular welded, and that the container rear wall attached to the back of the container body, in particular welded, is designed as a preferably flat pressed part.

[0046] Expander technology is a common and therefore proven process in the manufacture of dishwasher containers, especially household dishwashers.

[0047] In a further embodiment, it is provided that the rinsing container comprises a plurality of wall parts which preferably form flat container plates before the production of the rinsing container.

[0048] The production of a rinsing container from several, in particular independent, wall parts basically allows a technically and technologically simple production of a rinsing container using known and proven manufacturing processes.

[0049] In general, a washing container can be provided with a U-shaped frame part that is open at the bottom and forms a front surface of the washing container. This frame part is preferably connected to the metal container hood by means of rivets, in particular thermal rivets, which engages in the trough-shaped metal container base and which accommodates the door seal in a groove-shaped contour. Such a frame part is known, for example, from the document WO 2007 / 048697 A1; the relevant disclosure content of this document is hereby incorporated into the subject matter of the present disclosure. The frame part preferably comprises a plastic, in particular a glass-fiber-reinforced polypropylene, and is fastened at least to the container hood of the metal washing container by means of thermal riveting technology. The same frame part can also be used for washing containers with a trough-shaped metal base or washing containers with a trough-shaped plastic base.

[0050] The frame part, which preferably comprises at least one plastic, can also form a front surface of the interior of the washing container, so that the container hood of the washing container made of metal is partially covered on the inside by the frame part and the washing container is highly leak-proof. Furthermore, the heights of the two container side walls made of metal, the container rear wall made of metal and the frame part can be selected such that the dishwasher has a device height in the range of approximately 86.5 cm, approximately 81.5 cm, approximately 77.5 cm, approximately 70 cm, approximately 60 cm or approximately 45 cm. At the specified device heights, the dishwasher does not have a worktop on top. The increasing average height of people, a growing sensitivity to posture problems and painful injuries to the human back are leading to a steady trend towards tall dishwashers.

[0051] In a further embodiment, at least one stiffening element, preferably as wide as the rear wall, is provided in at least one region above the container rear wall. "As wide as the rear wall" means that the length of the stiffening element corresponds approximately to or is equal to the width of the container rear wall.

[0052] The preferably rear-wall-wide and optionally multi-part stiffening element is preferably a stiffening profile and in particular a stiffening rail. The possible multi-part nature of the preferably rear-wall-wide stiffening element can be configured in the longitudinal direction, the height direction, and / or the width direction. Furthermore, the preferably rear-wall-wide stiffening element can be provided either above the container rear wall with an unchanged height of the container rear wall or above the container rear wall with a shortened height of the container rear wall. The shortening of the shortened container rear wall can occur in particular up to the connection area, in particular the welding area, with the container frame.Instead of, for example, a 0.4 mm thick Cr steel plate for the adjacent container rear wall element, a more cost-effective steel plate, such as a carbon steel plate, can be used for the preferably back-wall-wide stiffening element. The cost of a carbon steel plate is approximately one-third of that of a Cr steel plate.

[0053] The stiffening element, which is preferably as wide as the rear panel, serves primarily to absorb potential clamping forces during device transport. The potential clamping forces also form the basis for the structural design of the stiffening element, which is preferably as wide as the rear panel.

[0054] The preferably rear-wall-wide stiffening element can have different cross-sectional shapes. The individual cross-sectional shape can be L-shaped, U-shaped, approximately U-shaped, or I-shaped. Of course, other cross-sectional shapes that meet the operational requirements of the preferably rear-wall-wide stiffening element are also possible. The maximum height of the preferably rear-wall-wide stiffening element is in a range from 25 to 40 mm, in particular from 25 to 25 mm, and a possible width of the preferably rear-wall-wide stiffening element is in a range from 0.3 mm (minimum wall thickness of the carbon steel plate) to 12 mm, in particular from 6 to 12 mm.

[0055] By using the stiffening element, which is preferably as wide as the back panel, it is possible to eliminate the need for a conventional wooden clamp strip, which costs approximately €0.40 per dishwasher, or other additional parts for transporting the appliance. Furthermore, the stiffening element, which is preferably as wide as the back panel, can be equipped with means for attaching a hose holder, means for attaching a tabletop, and / or other means. It can also be used as a height stop, optionally with a stop dome.

[0056] In a further embodiment, the stiffening element, which is preferably as wide as the rear wall, is attached, in particular welded, to the container rear wall or to the container body. Thus, the stiffening element, which is preferably as wide as the rear wall, can be butt-welded or overlapped to the container rear wall using a laser weld seam, or can be overlapped to the container body using a roll seam or spot weld seam.

[0057] The stiffening element, which is preferably as wide as the back wall, can be attached, in particular welded, during the manufacture of the container rear wall using a tool in a press line or possibly later in a container line. No separate tool is required for the stiffening rail, which is preferably as wide as the back wall. As already explained, the stiffening element, which is preferably as wide as the back wall, is preferably permanently attached, in particular welded, to the container rear wall or to the container frame. Alternatively, the stiffening element, which is preferably as wide as the back wall, can also be removably attached to the container rear wall or to the container frame, for example by means of a form-fitting extension or clip-in connection known to those skilled in the art.

[0058] The dishwasher can in particular be a household dishwasher.

[0059] Further possible implementations of the invention also include combinations of features or embodiments described above or below with respect to the exemplary embodiments not explicitly mentioned. In this case, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0060] Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention will be explained in more detail below using preferred embodiments with reference to the accompanying figures.

[0061] It shows

[0062] Fig. 1 is a schematic perspective view of an embodiment of a known dishwasher;

[0063] Fig. 2 is a schematic exploded view of a preferred embodiment of the washing container of the dishwasher of Fig. 1;

[0064] Fig. 3 is a schematic perspective view of the preferred embodiment of the washing container of the dishwasher of Fig. 2, taken obliquely from the front;

[0065] Fig. 4 is a schematic exploded view of another preferred embodiment of the washing container of the dishwasher of Fig. 1;

[0066] Fig. 5 is a schematic exploded view of another preferred embodiment of the washing container of the dishwasher of Fig. 1;

[0067] Fig. 6 is a schematic view of a container rear wall according to the invention of the washing container of the dishwasher of Fig. 1 in the depth direction of the dishwasher; Fig. 7A is a schematic view of a two-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 1 in the depth direction of the dishwasher;

[0068] Fig. 7A* a schematic side view of the two-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 7A from the right;

[0069] Fig. 7B is a schematic view of a three-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 1 in the depth direction of the dishwasher;

[0070] Fig. 7B* a schematic side view of the three-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 7B from the right;

[0071] Fig. 7C is a schematic view of a four-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 1 in the depth direction of the dishwasher;

[0072] Fig. 7C* a schematic side view of the four-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 7C from the right;

[0073] Fig. 8 is a schematic side view of the washing container of the dishwasher of Fig. 1 from the right;

[0074] Fig. 9A is an enlarged detailed view of the washing container of the dishwasher of Fig. 8;

[0075] Fig. 9B is an enlarged detailed view of the washing container of the dishwasher of Fig. 9A;

[0076] Fig. 10 is an enlarged view of a vertical section through a weld seam of the container rear wall according to the invention of the washing container of the dishwasher of Fig. 1;

[0077] Fig. 11 is a schematic perspective view of a two-part container rear wall according to the invention of the washing container of the dishwasher of Fig. 1 with a stiffening element;

[0078] Fig. 12 is a schematic and enlarged detailed view of the two-part container rear wall according to the invention of Fig. 11 with the stiffening element;

[0079] Fig. 13 shows a preferred method of attaching a stiffening element to a container rear wall according to the invention; and Figs. 14A to 14C show various preferred and schematic embodiments of a stiffening element for a container rear wall according to the invention in a respective longitudinal cross-section.

[0080] In the figures, identical or functionally equivalent elements have been given the same reference numerals unless otherwise stated.

[0081] Fig. 1 shows a schematic perspective view of an embodiment of a known water-conducting household appliance 1. The water-conducting household appliance is in the present case a known dishwasher 1, in particular a household dishwasher.

[0082] The dishwasher 1 typically has a wash tub 2 designed as a work chamber for receiving the items to be cleaned, which can be closed, in particular, in a watertight manner, by a tub door 3. For this purpose, a sealing device can be provided between the tub door 3 and the wash tub 2. The wash tub 2 is preferably cuboid-shaped. The wash tub 2 can be arranged in a housing of the dishwasher 1. The wash tub 2 and the tub door 3 can form a wash chamber 4 for washing the items to be washed.

[0083] The container door 3 is shown in its open position in Fig. 1. The container door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the container door 3. A front loading opening 6 of the washing container 2 can be closed or opened using the container door 3.

[0084] The washing tub 2 is, for example, cuboid-shaped and comprises a tub base 7, a tub ceiling 8 arranged opposite the tub base 7, a tub rear wall 9 arranged opposite the closed door 3, and two tub side walls 10, 11 arranged opposite one another. The tub base 7, the tub ceiling 8, the tub rear wall 9, and the tub side walls 10, 11 can be made, for example, from stainless steel sheet. The dishwasher 1 further has at least one loading level 12 to 14. The loading level 12 to 14 is preferably a dishware receptacle of the dishwasher 1. In particular, several loading levels 12 to 14 can be provided, wherein a loading level 12 can be a lower crockery basket (lower basket), a loading level 13 can be an upper crockery basket (upper basket), and a loading level 14 can be a cutlery drawer of the dishwasher 1.The plurality of loading levels 12 to 14 are preferably arranged one above the other in the washing container 2. Each loading level 12 to 14 can be displaced either in an insertion direction E (arrow) into the washing container 2, in particular linearly, or in an extension direction A (arrow) out of the washing container 2, in particular linearly.

[0085] Fig. 2 shows a schematic exploded view of a preferred embodiment of the washing container 2 of the dishwasher 1 of Fig. 1.

[0086] In this preferred embodiment of the washing compartment 2 of the dishwasher 1, at least the right compartment side wall 11, the compartment ceiling 8, and the left compartment side wall 10 form a compartment hood 15, which, in the stretched state, forms a preferably flat pressed part and is subsequently bent into a U-shape. The compartment hood 15, which is in the shape of a so-called "standing U," and at least the trough-shaped compartment base 7, which is preferably a deep-drawn part, form a compartment frame 16. The compartment rear wall 9, which is designed as a preferably flat pressed part, is attached, in particular welded, to the rear of the compartment frame 16.

[0087] Furthermore, the container hood 15 is provided on the front side with a U-shaped frame part 17 that is open downwards and forms a front surface F of the washing container 2. The frame part 17 is positively connected to the container hood 15 by means of rivets, in particular thermal rivets, and engages in the trough-shaped container base 7. Furthermore, the frame part 17 is provided on the front side with a circumferential groove-shaped contour 18, which accommodates a door seal known to those skilled in the art, and it preferably comprises a plastic, in particular a glass-fiber-reinforced polypropylene. Such a frame part 17 is disclosed, for example, in the aforementioned document DE 102015216228 A1; the relevant content of this document is hereby incorporated into the present description.

[0088] The two container side walls 10, 11 of the container hood 15 are connected to one another at their respective lower wall edges 26.1, 26.2 with the trough-shaped container bottom 7 by means of external interfaces 19, preferably in a form-fitting manner, in particular by a dynamic or static fold or by a roll seam weld (see Fig. 3).

[0089] The two external interfaces 19, the container hood 15 and the trough-shaped container bottom 7 each have a 90° bend 20 to the outside in their rear areas.

[0090] Fig. 3 shows a schematic perspective view of the preferred embodiment of the washing container of the dishwasher of Fig. 2, viewed diagonally from the front.

[0091] The two container side walls 10, 11 of the container hood 15 are, as already explained, connected to one another at their respective lower wall edges 26.1, 26.2 (Fig. 2) with the trough-shaped container bottom 7 by means of external interfaces 19, preferably in a form-fitting manner, in particular by a dynamic or static fold or by a roll seam weld.

[0092] Furthermore, the container rear wall 9 is welded to the back of the container frame 16 by means of laser welding or roll seam welding.

[0093] The frame part 17 is positively connected to the container hood 15 by means of rivets, in particular thermal rivets, and engages in the trough-shaped container bottom 7. Furthermore, the frame part 17 is provided on the front side with a circumferential groove-shaped contour 18, which accommodates a door seal known to those skilled in the art, and it preferably comprises a plastic, in particular a glass-fiber-reinforced polypropylene.

[0094] The right container side wall 11, the container cover 8 and the left container side wall 10, i.e. the container hood 15, are preferably made of a ferritic steel, for example WNo. 1.4016. And the trough-shaped

[0095] Container bottom 7 is preferably made of an austenitic steel, for example

[0096] WNo. 1.4301 or WNo. 1.4310.

[0097] Fig. 4 shows a schematic exploded view of another preferred embodiment of the washing container 2 of the dishwasher 1 of Fig. 1.

[0098] In this preferred embodiment of the washing compartment 2 of the dishwasher 1, at least the right compartment side wall 11, the compartment ceiling 8, and the left compartment side wall 10 form a compartment hood 15, which, in the extended state, forms a preferably flat compartment shell plate 21. The trough-shaped compartment base 7 forms a preferably flat compartment bottom plate 22 in the extended state.

[0099] Furthermore, an internal sealing bed frame 24, which is welded to the inside of the container hood 2 and then, together with the container hood 2, forms a circumferential groove-shaped contour 18 on the front side for receiving a door seal known to the person skilled in the art, and an external frame part 25, in particular a steel frame, are provided separately.

[0100] In a finished rinsing tank 2, the two tank plates 21, 22 were formed into the tank body in an expander after being joined, in particular welded, together. In particular, the two side walls 10, 11 of the tank hood 15 were joined, in particular welded, to the trough-shaped tank base 7 at their respective lower wall edges 26.1, 26.2 by a joining process.

[0101] Furthermore, the container rear wall 9, which is designed as a preferably flat pressed part, is welded to the back of the container frame by means of laser welding or roll seam welding.

[0102] The right container side wall 11, the container ceiling 8, and the left container side wall 10, i.e., the container hood 15 and the container shell plate 21, respectively, are preferably made of a ferritic steel, for example, WNo. 1.4016. And the trough-shaped container bottom 7, i.e., the container bottom plate, is preferably made of an austenitic steel, for example, WNo. 1.4301.

[0103] Fig. 5 shows a schematic exploded view of another preferred embodiment of the washing container 2 of the dishwasher 1 of Fig. 1.

[0104] In this preferred embodiment of the washing container 2 of the dishwasher 1, the washing container 2 comprises a plurality of wall parts 7 to 11, which, prior to the manufacture of the washing container 2, preferably formed flat container plates 23 and which were subsequently either pressed or deep-drawn.

[0105] Furthermore, an internal sealing bed frame 24, which is welded to the inside of the container hood 2 and then, together with the container hood 2, forms a circumferential groove-shaped contour 18 on the front side for receiving a door seal known to the person skilled in the art, and an external frame part 25, in particular a steel frame, are provided separately.

[0106] In a finished rinsing container 2, the wall parts 7, 8, 10 and 11 were connected to one another by a joining process, in particular welded to one another, preferably by means of laser welding or roll seam welding.

[0107] Furthermore, the container rear wall 9, which is designed as a preferably flat pressed part, is welded to the back of the container frame (see Fig. 3) by means of laser welding or roll seam welding.

[0108] The right container side wall 11, the container ceiling 8, and the left container side wall 10 are preferably made of a ferritic steel, for example, WNo. 1.4016. And the trough-shaped container bottom 7 is preferably made of an austenitic steel, for example, WNo. 1.4301 or WNo. 1.4310.

[0109] Fig. 6 shows a schematic view of a container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 1 in the depth direction T (arrow) of the dishwasher 1. The depth direction T (arrow) extends in the direction from the container door 3 (see Fig.

[0110] 1) to the container rear wall 9 (see Fig. 1).

[0111] The container rear wall 9 comprises at least two, in particular flat, container rear wall elements 9.1, 9.2, which are connected, in particular welded, at least in sections along a connecting region VB, in particular a connecting line VL, to the at least one adjacent container rear wall element 9.2, 9.1 by at least one joining process. The joining process is preferably a welding process with the creation of a weld seam SN, in particular laser welding with the creation of a laser weld seam (see Fig. 10).

[0112] Each individual container rear wall element 9.1, 9.2 of the container rear wall 9 can of course have selected features, such as material, treatment, surface size, arrangement, orientation, design, in particular shape, as well as element thickness.

[0113] The connecting area VB, in particular the connecting line VL, preferably runs approximately horizontally, in particular horizontally. However, it can also run at an angle of up to 90° to the horizontal H (double arrow). The lower edge of the vertically lowest container rear wall element can also run horizontally, and the upper edge of the vertically lowest container rear wall element can run horizontally or at a small angle, for example, of up to 15°, to the horizontal H (double arrow).

[0114] According to the invention, the vertically lowest container rear wall element 9.1 consists of an austenitic steel, for example, WNo. 1.4301, whereas the further, in particular the upper, container rear wall element 9.2 consists of a ferritic steel, for example, WNo. 1.4016. The vertical V is represented by a double arrow.

[0115] Furthermore, the vertically lowest container rear wall element 9.1 has a height H9.1 in the range of 10 to 50 mm, preferably from 15 mm to 40 mm, in particular from 20 to 30 mm, from a contact line BL with the trough-shaped container base 7 (see Fig. 9A). The embodiments of the washing compartment 2 of the dishwasher 1 shown in schematic exploded views in Fig. 2, Fig. 4 and Fig. 5 can of course have a container rear wall 9 according to the invention with at least two, in particular flat, container rear wall elements, which are connected, in particular welded, to the at least one adjacent container rear wall element at least in sections along a connecting region VB, in particular a connecting line VL, by at least one joining process. The respective joining process is preferably a welding process with the creation of a weld seam SN, in particular laser welding with the creation of a laser weld seam (see Fig.10).

[0116] The respective connection area VB, in particular the respective connection line VL, and the respective weld seam SN are only indicated by a common dashed line.

[0117] Fig. 7A shows a schematic view of a two-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 1 in the depth direction T (arrow) of the dishwasher 1.

[0118] The container rear wall 9 has two flat container rear wall elements 9.1, 9.2. The vertically lowest container rear wall element 9.1 is made of austenitic steel, and the further container rear wall element 9.2, arranged vertically above it, in particular the upper one, is made of ferritic steel. The two container rear wall elements 9.1, 9.2, which are connected, in particular welded, to the at least one adjacent container rear wall element 9.2, 9.1 at least in sections along a connecting region VB, in particular a connecting line VL, by at least one joining process. The joining process is preferably a welding process with production of a weld seam SN, in particular laser welding with production of a laser weld seam (see also Fig. 10).

[0119] Fig. 7A* shows a schematic side view of the two-part container rear wall 9 of the washing container 2 of the dishwasher 1 of Fig. 7A from the right. The two container rear wall elements 9.1, 9.2 of the container rear wall 9 can be aligned with one another and have the same wall thickness s9.1, s9.2, for example 0.4 mm. However, the wall thicknesses s9.1, s9.2 can also be different; the respective wall thickness s9.1, s9.2 can be between 0.25 mm and 0.60 mm. In general, each individual container rear wall element 9.1, 9.2 of the container rear wall 9 can have selected features, such as material, treatment, surface area, arrangement, orientation, formation, in particular shape, as well as element thickness.

[0120] Fig. 7B shows a schematic view of a three-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 1 in the depth direction T (arrow) of the dishwasher 1.

[0121] The container rear wall 9 has three flat container rear wall elements 9.1, 9.2, 9.3. The vertically lowest container rear wall element 9.1 is made of an austenitic steel and has a wall thickness s9.1 (Fig. 7B*) of, for example, 0.4 mm, the first further container rear wall element 9.2, arranged vertically above it, in particular the upper one, is made of a ferritic steel and has a wall thickness s9.2 (Fig. 7B*) of, for example, 0.3 mm and the second further container rear wall element (“noise protection element”) 9.3, arranged at least partially on the outside of the first further container rear wall element, in particular the upper one, is made of a ferritic steel and has a wall thickness s9.3 (Fig. 7B*) of, for example, 0.3 mm.

[0122] However, the wall thicknesses can also vary; the respective wall thickness can be between 0.25 mm and 0.60 mm. In general, each individual container rear wall element 9.1, 9.2, 9.3 of the container rear wall 9 can have selected features, such as material, treatment, surface area, arrangement, orientation, design, in particular shape, as well as element thickness.

[0123] The three container rear wall elements 9.1, 9.2, 9.3, which are connected, in particular welded, at least in sections along a connecting region VB, in particular a connecting line VL, to the at least one adjacent container rear wall element 9.1, 9.2, 9.3 by at least one joining process. The joining process is preferably a welding process with the creation of a weld seam SN, in particular a laser welding process with the creation of a laser weld seam (see also Fig. 10).

[0124] Fig. 7B* shows a schematic side view of the three-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 7B from the right.

[0125] The two container rear wall elements 9.1, 9.2 of the container rear wall 9 are arranged flush with each other on the inside.

[0126] The second additional container rear wall element (“noise protection element”) 9.3 is arranged in particular in an area C (double arrow) of the container rear wall 9, in which any spray jets of the upper spray system (not shown) strike the inner side IS of the container rear wall 9, i.e. the first additional container rear wall element 9.2.

[0127] Fig. 7C shows a schematic view of a four-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 1 in the depth direction T (arrow) of the dishwasher 1.

[0128] The container rear wall 9 has four flat container rear wall elements 9.1 to 9.4. The vertically lowest container rear wall element 9.1 consists of an austenitic steel and has a wall thickness s9.1 (Fig. 7C*) of, for example, 0.4 mm, the first further container rear wall element (“sealing element”) 9.2 arranged vertically above it consists of a ferritic steel and has a wall thickness s9.2 (Fig. 7C*) of, for example, 0.3 mm, the second further container rear wall element (“noise protection element”) 9.3 arranged vertically above it consists of a ferritic steel and has a wall thickness s9.3 (Fig. 7C*) of, for example, 0.6 mm and the third further container rear wall element (“second sealing element”) 9.4 arranged vertically above it consists of a ferritic steel and has a wall thickness s9.4 (Fig. 7C*) of, for example, 0.3 mm.However, the wall thicknesses can also vary; the respective wall thickness can be between 0.25 mm and 0.60 mm. In general, each individual container rear wall element 9.1 to 9.4 of the container rear wall 9 can have selected features, such as material, treatment, surface area, arrangement, orientation, design, in particular shape, as well as element thickness.

[0129] The four container rear wall elements 9.1 to 9.4, which are connected, in particular welded, to the at least one adjacent container rear wall element 9.1 to 9.4 at least in sections along a connecting region VB, in particular a connecting line VL, by at least one joining process. The joining process is preferably a welding process with the creation of a weld seam SN, in particular laser welding with the creation of a laser weld seam (see Fig. 10).

[0130] Fig. 7C* shows a schematic side view of the four-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 7C from the right.

[0131] The four container rear wall elements 9.1 to 9.4 of the container rear wall 9 are arranged flush with each other on the inside.

[0132] The second further container rear wall element (“noise protection element”) 9.3 arranged vertically above is arranged in particular in an area C (double arrow) of the container rear wall 9, in which any spray jets of the upper spray system (not shown) strike the inner side IS of the container rear wall 9.

[0133] Fig. 8 shows a schematic side view of the washing container 2 of the dishwasher 1 of Fig. 1 from the right.

[0134] This schematic side view of the washing container 2 shows the trough-shaped container base 7, the right-hand container side wall 11, and the container ceiling 8. The frame part 24 is shown at the front of the washing container 2, and the container rear wall 9 according to the invention is shown at the rear of the washing container 2. The container rear wall 9 comprises at least two, in particular flat, container rear wall elements 9.1, 9.2, which are connected, in particular welded, to the at least one adjacent container rear wall element 9.2, 9.1 at least in sections along a connecting region VB, in particular a connecting line VL, by at least one joining process. The joining process is preferably a welding process with the creation of a weld seam, in particular laser welding with the creation of a laser weld seam (see also Fig. 10).

[0135] Each individual container rear wall element 9.1, 9.2 of the container rear wall 9 can of course have selected features, such as material, treatment, surface size, arrangement, orientation, design, in particular shape, as well as element thickness.

[0136] According to the invention, the vertically lowest container rear wall element 9.1 consists of an austenitic steel, for example, WNo. 1.4301, whereas the further, in particular the upper, container rear wall element 9.2 consists of a ferritic steel, for example, WNo. 1.4016. The vertical V is represented by a double arrow.

[0137] Fig. 9A shows an enlarged detailed view of the washing container 2 of the dishwasher 1 according to Fig. 1.

[0138] The vertically lowest container rear wall element 9.1 of the container rear wall 9 has, in an easily recognizable manner, a height H9.1 in the range from 10 to 50 mm, preferably from 15 mm to 40 mm, in particular from 20 to 30 mm, from a contact line BL with the trough-shaped container base 7 of the washing container 2 of the dishwasher 1.

[0139] Fig. 9B shows an enlarged detailed view of the washing container 2 of the dishwasher 1 of Fig. 9A.

[0140] The enlarged detailed view shows the rear profile of the trough-shaped container base 7 including the external interface 19, i.e., the 90° bend. It also shows the lower profile of the vertically lowest container rear wall element 9.1 and the further, vertically arranged above it, in particular the upper, container rear wall element 9.2 of the container rear wall 9 according to the invention. The container rear wall 9, which is flanged in its lower region, is welded to the trough-shaped container base 7, i.e., to the container frame 16, by means of laser welding or roll seam welding. The welding area SB is merely indicated.

[0141] Furthermore, the vertically lowest container rear wall element 9.1 has a height H9.1 in the range from 10 to 50 mm, preferably from 15 mm to 40 mm, in particular from 20 to 30 mm, from a contact line BL with the trough-shaped container bottom 7.

[0142] The container rear wall elements 9.1, 9.2 are connected, in particular welded, to the at least one adjacent container rear wall element 9.2, 9.1 at least in sections along a connecting region VB, in particular a connecting line VL, by at least one joining process. The joining process is preferably a welding process with the creation of a weld seam SN, in particular a laser welding process with the creation of a laser weld seam (see Fig. 10).

[0143] Fig. 10 shows an enlarged view of a vertical section through a weld seam SN of the container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1.

[0144] The enlarged view shows two adjacent container rear wall elements of the container rear wall 9 according to the invention of the rinsing container 2, for example the vertically lowest container rear wall element 9.1, consisting of an austenitic steel, and the further, arranged vertically above it, in particular the upper, container rear wall element 9.2, consisting of a ferritic steel. The two container rear wall elements 9.1, 9.2 are connected to one another, in particular welded, at least in sections, preferably completely, along the connecting region VB, in particular the connecting line VL, by at least one joining process. The joining process is preferably a welding process with production of a schematically illustrated weld seam SN, in particular laser welding with production of a laser weld seam.The schematically illustrated weld seam SN, in particular the laser weld seam, has both a schematically illustrated weld root SW, which is formed on the outer side AS of the rinsing container 2, and a schematically illustrated seam surface NO, which is formed on the inner side IS of the rinsing container 2 and which is post-treated, preferably passivated, in particular laser passivated.

[0145] Fig. 11 shows a schematic perspective view of a two-part container rear wall 9 according to the invention of the washing container 2 of the dishwasher 1 of Fig. 1 with a stiffening element 27.

[0146] The stiffening element 27 is provided at least in a region B above the container rear wall 9 according to the invention. The stiffening element 27 is preferably designed to be as wide as the rear wall and is preferably a stiffening profile and in particular a stiffening rail. The stiffening element 27 can be provided additionally on all of the two- or multi-part container rear walls 9 described above and according to the invention.

[0147] The stiffening element 27 can be provided either above the container rear wall 9 according to the invention with an unchanged height of the container rear wall 9 or above the container rear wall 9 according to the invention with a shortened height of the container rear wall 9. The shortening of the shortened container rear wall 9 according to the invention can be carried out in particular up to the connection area, in particular the welding area, with the container frame 16 (see Fig. 3).

[0148] The stiffening element 27 serves in particular to absorb possible clamping forces K (arrow) during device transport.

[0149] Fig. 12 shows a schematic and enlarged detailed view of the two-part container rear wall 9 according to the invention of Fig. 11 with the stiffening element 27.

[0150] The stiffening element 27 is provided with means 28 for fastening a hose holder, means 29 for fastening a table top and / or other means.

[0151] Furthermore, the stiffening element 27 can also be used as a height stop 30, optionally with a stop dome. Figure 13 shows a preferred method of attaching a stiffening element 27 to a container rear wall 9 according to the invention.

[0152] The stiffening element 27 is preferably attached, in particular welded, directly to the container rear wall 9 according to the invention. The stiffening element 27 can be attached to the container rear wall 9 according to the invention by means of a laser weld seam, either butt-jointed or overlapping (not shown).

[0153] Alternatively, in a manner not shown, the stiffening element 27 can also be attached, in particular welded, directly to the container body 16 (see Fig. 3). The stiffening element 27 can be attached to the container body 16 (see Fig. 3) by means of a laser weld, a roll weld, or a spot weld in an overlapping manner.

[0154] Fig. 14A to Fig. 14C show various preferred and schematic embodiments of a stiffening element 27 for a container rear wall (not shown) according to the invention in a respective longitudinal cross section.

[0155] The stiffening element 27 can have different cross-sectional shapes Q. The individual cross-sectional shape Q can be L-shaped (Fig. 14A), U-shaped or approximately U-shaped (Fig. 14B), or I-shaped (Fig. 14C). The maximum height H27 of the stiffening element 27 (see, for example, Fig. 14A) is in a range from 25 to 40 mm, in particular from 25 to 25 mm, and a possible width B27 of the stiffening element 27 (see, for example, Fig. 14B) is in a range from 0.3 (minimum wall thickness of the carbon steel plate) to 12 mm, in particular from 6 to 12 mm.

[0156] Although the present invention has been described using exemplary embodiments, it is susceptible to modification in many ways. Reference numerals used

[0157] 1 dishwasher; household dishwasher

[0158] 2 rinsing containers

[0159] 3 Container door

[0160] 4 Washing-up area

[0161] 5 swivel axis

[0162] 6 Loading opening

[0163] 7 Container bottom

[0164] 8 Tank ceiling

[0165] 9 Container rear wall .1 Container rear wall element .2 Container rear wall element .3 Container rear wall element .4 Container rear wall element

[0166] 10 Container side wall

[0167] 11 Container side wall

[0168] 12 loading levels; lower dish basket (lower basket)

[0169] 13 Loading level; upper dish basket (upper basket)

[0170] 14 loading levels; cutlery drawer

[0171] 15 Container hood

[0172] 16 container frame

[0173] 17 Frame part

[0174] 18 Groove-shaped contour

[0175] 19 External interface

[0176] 20 90° bends

[0177] 21 Container shell plate

[0178] 22 Container base plate

[0179] 23 Container board

[0180] 24 sealing bed frames

[0181] 25 Frame part .1 Lower wall edge .2 Lower wall edge

[0182] 27 clamping element

[0183] 28 Medium 29 Medium

[0184] 30 height stop

[0185] A Extension direction (arrow)

[0186] AS outside

[0187] B area

[0188] BL contact line

[0189] B27 Width

[0190] C area (double arrow)

[0191] E Insertion direction (arrow)

[0192] F Area

[0193] H Horizontal (double arrow)

[0194] H9.1 Height

[0195] H27 Height

[0196] IS inside

[0197] K Clamp force (arrow)

[0198] NO seam surface

[0199] Q Cross-sectional shape

[0200] SB welding area

[0201] SN weld seam

[0202] SW Weld root s9.1 Wall thickness s9.2 Wall thickness s9.3 Wall thickness s9.4 Wall thickness

[0203] T Depth direction (arrow)

[0204] V Vertical (double arrow)

[0205] VB connection area

[0206] VL connecting line

Claims

Patent claims 1. Dishwasher (1), in particular a household dishwasher, comprising at least one washing container (2) for receiving wash ware, which comprises a plurality of wall parts (7 to 11) preferably made of metal and which is provided at the front with a loading opening (6) for loading with wash ware, which can be closed at least temporarily by a container door (3), - wherein at least the right container side wall (11), the container cover (8) and the left container side wall (10) form a container hood (15), - wherein the container hood (15) and at least the trough-shaped container base (7) form a container frame (16), - wherein the container rear wall (9) is attached, in particular welded, to the rear of the container frame (16), and - wherein the container rear wall (9) comprises at least two, in particular flat, container rear wall elements (9.1, 9.2), preferably at least three, in particular flat, container rear wall elements (9.1, 9.2, 9.3), in particular at least four, in particular flat, container rear wall elements (9.1 to 9.4), which are connected, in particular welded, at least in sections along a connecting region (VB), in particular a connecting line (VL), by at least one joining method to the at least one adjacent container rear wall element (9.1, 9.2; 9.1, 9.2, 9.3; 9.1 to 9.4).

2. Dishwasher (1) according to claim 1, characterized in that the connecting region (VB), in particular the connecting line (VL), runs approximately horizontally, in particular horizontally.

3. Dishwasher (1) according to claim 1 or 2, characterized in that - that the joining process is a welding process with the creation of a weld seam (SN), in particular a laser welding process with the creation of a laser weld seam, and / or that the weld seam (SN), in particular the laser weld seam, has a weld root (SW) which is formed on the outer side (AS) of the rinsing container (2).

4. Dishwasher (1) according to claim 3, characterized in that the weld seam (SN), in particular the laser weld seam, has a seam surface (NO) which is preferably formed on the inside (IS) of the washing container (2) and which is post-treated, preferably passivated, in particular laser passivated.

5. Dishwasher (1) according to one of the preceding claims, characterized in that the vertically lowest container rear wall element (9.1) has a height (H9.1) in the range from 10 to 50 mm, preferably from 15 mm to 40 mm, in particular from 20 to 30 mm, from a contact line (BL) with the trough-shaped container bottom (7).

6. Dishwasher (1) according to one of the preceding claims, characterized in that the trough-shaped container base (7) and the vertically lowest container rear wall element (9.1) consist of an austenitic steel.

7. Dishwasher (1) according to one of the preceding claims, characterized in that - that the at least one further container rear wall element (9.2, 9.3, 9.4), the right container side wall (11), the container ceiling (8) and the left container side wall (10) consist of a ferritic steel and / or - that the container rear wall (9) is welded to the back of the container frame (16) by means of laser welding or roll seam welding.

8. Dishwasher (1) according to one of the preceding claims, characterized in that the two container side walls (10, 11) of the container hood (15) are connected to one another at their respective lower wall edges with the trough-shaped container base (7) by means of external interfaces (19), preferably in a form-fitting manner, in particular by a dynamic or static fold or by a roll seam weld.

9. Dishwasher (1) according to claim 8, characterized in that the two external interfaces (19), the container hood (15) and the trough-shaped container base (7) each have a 90° bevel (20) towards the outside in their rear areas.

10. Dishwasher (1) according to claim 8 or 9, characterized in that - that the container hood (15) formed a preferably flat press part in the stretched state and was then bent into a U-shape and - that the container rear wall (9) attached to the rear of the container frame (16), in particular welded, is designed as a preferably flat press part.

11. Dishwasher (1) according to one of claims 1 to 7, characterized in that the two container side walls (10, 11) of the container hood (15) are connected to one another, in particular welded to one another, at their respective lower wall edges to the trough-shaped container base (7) by a joining process.

12. Dishwasher (1) according to claim 11, characterized in that - that the container hood (15) in the stretched state formed a preferably flat container shell plate (21), - that the trough-shaped container base (7) in the stretched state formed a preferably flat container base plate (22), - that the two container plates (21, 22) were deformed into the container frame (16) in an expander after their connection, in particular welding, and - that the container rear wall (9) attached to the rear of the container frame (16), in particular welded, is designed as a preferably flat press part.

13. Dishwasher (1) according to one of claims 1 to 7, characterized in that the washing container (2) comprises a plurality of wall parts (7 to 11) which, before the manufacture of the washing container (2), preferably formed flat container plates (23).

14. Dishwasher (1) according to one of the preceding claims, characterized in that at least one stiffening element (27) is provided, preferably as wide as the rear wall, at least in one region (B) above the container rear wall (9).

15. Dishwasher (1) according to claim 14, characterized in that the preferably rear-wall-wide stiffening element (27) is attached, in particular welded, to the container rear wall (9) or to the container frame (16).

Images