Dishwasher comprising at least one sound-deadening system

Abstract

The invention relates to a dishwasher (1), in particular a domestic dishwasher, at least comprising a dishwasher tub (2) for receiving items to be washed, the dishwasher tub having multiple dishwasher tub walls (7 to 11; 11) preferably made of metal and being provided, preferably on the front side, with a loading opening (6) for loading items to be washed, said opening being closable at least temporarily by a dishwasher tub door (3), wherein at least one sound-deadening system (16) is applied at least to the outside of at least one dishwasher tub wall (7 to 11; 11) and / or to the container door (3), and wherein the sound-deadening system (16) comprises a plurality of non-interconnected sound-deadening elements (17), in particular bitumen elements, which have a small surface area.

Description

[0001] 202401677

[0002] 1 / 31

[0003] Dishwasher with at least one sound dampening system

[0004] The invention relates to a dishwasher, comprising at least a washing container for receiving items to be washed, which comprises several washing container walls, preferably made of metal, and which is preferably provided with a loading opening at the front for loading items to be washed, which can be closed at least temporarily by a container door.

[0005] The dishwasher can be a household dishwasher.

[0006] In dishwashers, especially household dishwashers, polymer-modified bitumen mats are typically used for sound insulation and damping. These polymer-modified bitumen mats, filled with inorganic materials such as rock flour or iron oxide, offer both a high density and a loss factor specifically tailored to their intended use. The loss factor describes a material's ability to convert vibrational energy into heat and thus dampen it.

[0007] With the help of these polymer-modified bitumen mats, which are melted onto the outside of the rinsing tank and the tank door, sometimes in a complex process, a sound power level acceptable to the customer can be achieved.

[0008] The sides and door of a dishwasher's wash tub, especially a household dishwasher, are typically covered almost completely with polymer-modified bitumen mats. This achieves the greatest possible reduction in radiated sound power.

[0009] Document WO 2012 / 007062 A1 discloses a water-bearing household appliance, in particular a dishwasher, with a wash tank on the outside of at least one wall of which a sound-dampening layer mat, in particular a bitumen mat, is applied. The at least one sound-dampening layer mat is 202401677

[0010] 2 / 31 is applied only partially to at least one area of ​​the wash tank wall that exhibits greater operational vibration than other areas of the wash tank wall. The area of ​​the wash tank wall with greater operational vibration may be a droplet impact area excited by operationally occurring droplets. Furthermore, the sound damping layer mat may be applied only partially to at least one area of ​​the wash tank wall with greater operational vibration, and at least one different material layer mat, in particular a thermal insulation layer mat and / or sound absorption mat, may be applied to at least one area of ​​the wash tank wall with lower operational vibration. Additionally, at least one further sound insulation layer mat may be provided that covers a large area of ​​the wash tank wall compared to the sound damping layer mat that is only partially applied to the wash tank.

[0011] German patent application DE 10 2011 116 809 A1 discloses a household appliance with a space enclosed by appliance walls, in particular a dishwasher with a wash chamber, wherein a sound-dampening mat is attached to at least one surface of an appliance wall. The sound-dampening mat has a structure consisting of one or more open recesses, one or more of which are filled with air. In the case of multiple recesses, they can be arranged so that they do not touch each other. Furthermore, the at least one recess can be a through-opening penetrating the sound-dampening mat in its thickness direction. The sound-dampening mat can also be a bitumen mat, in particular a heavy-duty mat.

[0012] The publication EP 2 554 091 A1 discloses a sound-absorbing and / or sound-insulating sandwich panel comprising a first layer for sound absorption and / or sound insulation and a second layer for thermal insulation, the second layer being rigidly bonded to the first layer at its first main face and intended for connection with a component to be acoustically improved at its second main face. The second layer of the sound-absorbing and / or sound-insulating sandwich panel has perforations. The perforations may include through holes that completely penetrate the second layer in a direction extending from the first layer to the component. Furthermore, the second layer may contain foamed material with 202401677

[0013] 3 / 31

[0014] The perforation may contain pores, and the perforation may include closed cavities larger than the pores. Furthermore, the perforation may comprise 20 to 60 percent, preferably 30 to 50 percent, and particularly about 40 percent of the total volume of the second layer. Such a sound-absorbing and / or sound-insulating sandwich panel can be used in a dishwasher.

[0015] The known prior art has the disadvantage of adding extra mass to the dishwasher, especially a household dishwasher. This extra mass is known to have adverse effects on the energy consumption of the dishwasher, particularly a household dishwasher.

[0016] This additional mass must be heated unnecessarily during the washing process. To minimize energy consumption per wash cycle, efforts are typically made to reduce the amount of material used in the at least one polymer-modified bitumen mat in the dishwasher, especially in household dishwashers. However, this results in an increase in emitted sound power. Current solutions use a single-piece polymer-modified bitumen mat with reduced coverage of the respective tub wall or tub door.

[0017] This, in turn, results in large, continuous sections of the washbasin wall and / or door that are completely uninsulated. If a water jet then hits the bare washbasin in these areas, it has a detrimental effect on the emitted sound power.

[0018] Furthermore, this approach results in countless different component variants of polymer-modified bitumen mats to cover the soundproofing of different noise types and / or device configurations.

[0019] Against this background, one object of the present invention is to provide an improved dishwasher, in particular a household dishwasher. In particular, the present invention aims to reduce the vibration of a dishwasher's wash tub, especially a dishwasher (202401677).

[0020] 4 / 31

[0021] Household dishwashers, to improve, reduce the energy consumption of a dishwasher, especially a household dishwasher, and / or to decrease the component complexity of a dishwasher, especially a household dishwasher. Damping the wash tub of a dishwasher, especially a household dishwasher, is necessary to achieve and maintain a noise level that is comfortable for the customer.

[0022] To solve the problem according to the invention, a dishwasher, in particular a household dishwasher, is proposed, comprising at least a wash tub for receiving items to be washed, which includes several wash tub walls, preferably made of metal, and which is preferably provided with a loading opening at the front for loading items, which can be closed at least temporarily by a tub door. At least one sound dampening system is applied to at least one wash tub wall and / or the tub door, and the sound dampening system comprises a plurality of non-interconnected and small-area sound dampening elements, in particular bitumen elements.

[0023] One aspect of the present invention is to enable the reduction of the additional material introduced into the dishwasher, particularly a household dishwasher, for the desired sound dampening effect by using a multitude of non-interconnected and small-area sound dampening elements, especially bitumen elements, without compromising the desired sound dampening performance. Reducing the amount of material introduced also noticeably lowers the energy consumption of the dishwasher, particularly a household dishwasher, because the material is no longer present and therefore does not need to be heated during the washing process.Furthermore, the use of numerous non-interconnected and small-area sound-dampening elements, especially bitumen elements, reduces the component complexity of the dishwasher, particularly a household dishwasher, especially if the sound-dampening elements have the same design. This is achieved by not having a large number of known polymer-modified bitumen mats for sound insulation and sound dampening of the dishwasher (202401677).

[0024] 5 / 31

[0025] Dishwashers, especially household dishwashers, with different mat sizes, mat contours, mat thicknesses and the like, can be disregarded in particular.

[0026] The term "small area" refers to the surface area of ​​a component, such as a sound damping element, in particular a bitumen element, which is only a small value compared to the surface area of ​​a reference element, such as a sink tank wall and / or a tank door of a dishwasher, in particular a household dishwasher.

[0027] At least one wash tank wall and / or the tank door can be made of stainless steel sheet, for example. The lower wash tank wall, particularly the trough-shaped one, can be made of an austenitic steel, such as WNr. 1.4301. Austenitic steels are standardized in DIN EN ISO 3506-1, and materials such as 1.4401 (X5CrNiMo17-12-2, AISI 316), 1.4404 (X2CrNiMo17-12-2, AISI 316L), and 1.4571 (X6CrNiMoTi 17-12-2, AISI 316Ti) belong to this group. This list of materials is merely illustrative and not exhaustive. Furthermore, the other wash tank walls and the tank door can be made of a ferritic steel, such as WNr. 1.4016. Ferritic steel is standardized in DIN EN 10151.

[0028] A dishwasher's wash chamber wall and / or door not equipped with a sound dampening system according to the invention can either be covered with a large-area bitumen mat in a known manner or be left uncovered. A dishwasher's wash chamber wall and / or door can therefore have one of the three aforementioned embodiments on its exterior.

[0029] According to one embodiment, the small-area sound dampening element, in particular a bitumen element, has an area of ​​0.1 cm². 2 up to 160 cm 2 , preferably 0.15 cm 2 up to 100 cm 2 , especially 0.25 mm 2 up to 70 cm 2 , on.

[0030] A small-area sound dampening element, in particular a bitumen element, with such a surface area fully meets the requirements regarding 202401677

[0031] 6 / 31 desired sound damping and can be manufactured and processed well and reliably.

[0032] According to one embodiment, the small-area sound dampening element, in particular a bitumen element, has a horizontal length and / or a vertical length of 10 mm to 125 mm, preferably 12 mm to 100 mm, in particular 15 mm to 80 mm.

[0033] A small-area sound damping element, particularly a bitumen element, with such length ranges fully meets the requirements for the desired sound damping and can be manufactured and processed efficiently and reliably. The horizontal and / or vertical length can, but does not have to, be an edge length of the small-area sound damping element, particularly a bitumen element.

[0034] The term "horizontal length" refers to a horizontal length extension of a component, such as a sound damping element, in particular a bitumen element, on a reference element, such as a wash tank wall and / or a tank door of a dishwasher, in particular a household dishwasher.

[0035] The term "vertical length" refers to a vertical length extension of a component, such as a sound damping element, in particular a bitumen element, on a reference element, such as a wash tank wall and / or a tank door of a dishwasher, in particular a household dishwasher.

[0036] According to one embodiment, the small-area sound dampening element, in particular a bitumen element, has a thickness of 0.5 mm to 10 mm, preferably 1 mm to 8 mm, in particular 1 mm to 5 mm.

[0037] A small-area sound dampening element, in particular a bitumen element, with such thickness ranges fully meets the requirements regarding 202401677

[0038] 7 / 31 desired sound damping and can be manufactured and processed well and reliably.

[0039] Furthermore, such thickness ranges can be achieved in known dishwashers, especially household dishwashers, without major design changes in the spaces between, for example, the wash tub wall and the side wall. In open areas, such as the rear of a known dishwasher, especially a household dishwasher, even greater thicknesses, for example up to 20 mm, can be achieved.

[0040] Depending on the application location, the numerous small-area sound dampening elements can also have different thicknesses, preferably within the aforementioned thickness ranges.

[0041] According to one embodiment, the small-area sound dampening element, in particular a bitumen element, has a surface weight of 1 kg / m². 2 up to 15 kg / m 2 , preferably of 2 kg / m² 2 up to 12 kg / m² 2 , especially of 2 kg / m² 2 up to 10 kg / m² 2 , on.

[0042] A small-area sound damping element, particularly a bitumen element, with such thickness ranges fully meets the requirements for desired sound damping and can be manufactured and processed efficiently and reliably. The weight of a single small-area sound damping element, especially a bitumen element, can be adjusted by its thickness and density. The density, in turn, can be adjusted—that is, increased or decreased—by selecting appropriate fillers.

[0043] Higher basis weights that may be desired can only be achieved by increasing the thickness beyond 4 mm.

[0044] According to one embodiment, the small-area sound dampening element, in particular a bitumen element, has a surface geometry of a circle, an oval, a triangle, a quadrilateral, a rectangle, a square or a polygon, in particular a hexagon or an octagon. 202401677

[0045] 8 / 31

[0046] The surface geometries mentioned are simple and reliable to manufacture and fully meet the requirements for desired sound damping. Furthermore, these surface geometries are merely examples; the surface geometry can, in principle, have any conceivable shape. A particularly advantageous surface geometry for a small-area sound damping element, especially a bitumen element, is the square, which is easy to manufacture, handle, and apply, particularly in terms of alignment.

[0047] According to one embodiment, the multitude of non-interconnected and small-area sound damping elements, in particular bitumen elements, have predominantly the same, in particular identical, surface geometries or predominantly different, in particular different, surface geometries.

[0048] By using identical components for the numerous small-area sound-dampening elements, especially bitumen elements, component complexity can be reduced for different product variants. Only one component variant needs to be stocked. The product variant can be defined via the programming of the manufacturing technology ("variant by wire"). For example, a different percentage coverage of at least one wash tank wall and / or the tank door is conceivable. It is also possible to leave areas uncovered for certain variants, areas which are occupied by other components.

[0049] According to one embodiment, the multitude of non-interconnected and small-area sound damping elements, in particular bitumen elements, are at least partially structured, preferably mostly, and in particular fully structured, arranged.

[0050] The term "structured" component refers to a component that is provided with a specific structure or is designed to have a structure.

[0051] The spacing between the numerous individual small-area sound-dampening elements, especially bitumen elements, can be uniform or, in certain areas, narrower or wider. 202401677

[0052] 9 / 31

[0053] The distribution of the numerous individual small-area sound dampening elements, especially bitumen elements, can be designed with the aid of optimization algorithms so that they represent the best possible balance between radiated sound power and minimized energy consumption for the respective dishwasher, especially household dishwasher.

[0054] According to one embodiment, the multitude of non-interconnected and small-area sound damping elements, in particular bitumen elements, are at least partially structured, preferably mostly, and in particular completely unstructured.

[0055] The unstructured arrangement of numerous small-area sound-dampening elements, particularly bitumen elements, represents a potentially advantageous alternative to the structured arrangement of numerous small-area sound-dampening elements, particularly bitumen elements. It can be determined through various optimization processes and favors areas that are free of other components, such as an application device.

[0056] According to one embodiment, each pair of adjacent, small-area sound-dampening elements, in particular bitumen elements, has predominantly, and in particular entirely, the same or nearly the same minimum distances. The two adjacent, small-area sound-dampening elements, in particular bitumen elements, thus maintain a constant distance to the next small-area sound-dampening element, and the maximum distance to the next small-area sound-dampening element is always the same.

[0057] According to one embodiment, two adjacent, small-area sound dampening elements, particularly bitumen elements, have unequal or nearly unequal minimum distances. This allows for a better arrangement of two adjacent, small-area sound dampening elements, particularly bitumen elements. They can also be better adapted to critical areas, such as attachment points for cleaning equipment, components, and points of impact of a spray jet. 202401677

[0058] 10 / 31

[0059] According to one embodiment, the at least one wash tank wall and / or the tank door each have a coverage rate of 0.10 to 0.90, preferably 0.20 to 0.80, particularly in the range of 0.25, wherein the respective coverage rate is the quotient of the area covered by the sound-dampening elements, in particular bitumen elements, and the total area of ​​the at least one wash tank wall and / or the tank door. The covered area is the sum of the many individual areas of the multitude of small-area sound-dampening elements, in particular bitumen elements.

[0060] Such coverage areas for at least one wash tub wall and / or the tub door fully meet the requirements for desired sound dampening and can be manufactured efficiently and reliably. One objective is undoubtedly to achieve a particularly low coverage rate while maintaining good acoustic properties of the dishwasher, especially a household dishwasher. For dishwashers with superior acoustic properties, particularly household dishwashers, where energy consumption is not a primary concern, coverage rates of > 0.80 are also conceivable. The key limitation here will be the positioning accuracy of the individual small-area sound dampening elements, especially bitumen elements, without overlap.

[0061] According to one embodiment, the plurality of non-interconnected and small-area sound damping elements, in particular bitumen elements, are only partially applied to at least one flushing tank wall area and / or a tank door area, which has a greater operating vibration than other flushing tank wall areas, wherein the at least one flushing tank wall area and / or a tank door area with greater operating vibration is a droplet impact area, which is excited by drops impacting during operation.

[0062] An arrangement of numerous small-area sound-dampening elements, especially bitumen elements, in areas particularly exposed to a spray jet is acoustically advantageous. This is, for example, the effective area of ​​a tank cleaning nozzle. 202401677

[0063] 11 / 31

[0064] By distributing the individual small-area sound-dampening elements, particularly bitumen elements, across the entire surface of the flushing tank wall and / or the tank door, a mean path is created from every theoretically conceivable point of impact of the spray jet to the next small-area sound-dampening element, particularly a bitumen element. This path is shorter than with reduced soundproofing using only one large bitumen mat, for example, placed in the center of the surface. Because it is possible to position these small-area sound-dampening elements, particularly bitumen elements, as desired across the surface, the mean distance between the point of impact of the spray jet and the next small-area sound-dampening element, particularly a bitumen element, can be reduced.It can also be said that the average surface mass can be reduced while maintaining the manufacturing-related thickness of the small-area sound damping elements, especially bitumen elements.

[0065] According to one embodiment, the plurality of non-interconnected and small-area sound dampening elements, in particular bitumen elements, are glued to at least one flushing tank wall and / or the tank door by means of at least one adhesive, preferably by means of a hot melt adhesive, by means of a one- or multi-component adhesive and / or by means of a self-adhesive.

[0066] These connection methods between the numerous non-interconnected and small-area sound-dampening elements, especially bitumen elements, and at least one wash tank wall and / or the tank door allow for a fast and reliable manufacturing process. A melting or bonding device can also be integrated, enabling the immediate fixation of the small-area sound-dampening elements, particularly bitumen elements.

[0067] Alternatively, the small-area sound dampening elements, especially bitumen elements, can be prepared at a staging area and picked up and placed by the production equipment. Reactive or melting adhesives are particularly suitable for this purpose. The latter can already be applied to the small-area sound dampening elements, especially bitumen elements, and applied shortly before the individual small-area element is placed.

[0068] 12 / 31

[0069] Sound-dampening elements, especially bitumen elements, are liquefied. Alternatively, a contact adhesive that reacts upon contact with metal is conceivable, or at least one of the tank walls and / or the tank door should already be pre-treated with the adhesive at the points to be bonded.

[0070] Furthermore, it is conceivable that the small-area sound-dampening elements, particularly bitumen elements, are already pre-positioned on a carrier material. After transferring the arrangement to the wash tank wall and / or tank door, this carrier material is removed and can be reused depending on the design. The individual components can then be fixed in place by an adhesive process, such as heating in an oven. Alternatively, the small-area sound-dampening elements, particularly bitumen elements, can also be manufactured with a self-adhesive backing, thus eliminating the need for a subsequent melting process. Furthermore, the wash tank and / or tank door is immediately available for use and, in particular, easily transportable.

[0071] According to an alternative embodiment, the multitude of non-interconnected and small-area sound dampening elements, in particular bitumen elements, are applied as liquid material to at least one flushing tank wall and / or the tank door and subsequently cooled or hardened.

[0072] One conceivable option here is a water-based, initially liquid sound-dampening material that solidifies upon application to the wash tank wall and / or door through cooling or hardening. This is known in technical terms as "Liquid Applied Sound Deadener" (LASD) and can replace traditional bitumen acoustic damping mats. This modern alternative offers numerous advantages: Firstly, the new material saves weight, reduces costs, and minimizes inventory on the assembly line. Secondly, the use of a robotic system with at least one robotic arm allows for flexible adjustment of the application width and height to the respective component, thereby reducing weight. Additionally, the sound-dampening effect can be maximized through individual adjustment of the application. 202401677

[0073] 13 / 31

[0074] Since the small-area sound damping elements described here, especially bitumen elements, are merely points of mass with acoustically effective damping, they can be manufactured in various ways. The shape of these small-area sound damping elements, especially bitumen elements, can be arbitrary and can also vary from one another. The thickness of the small-area sound damping elements, especially bitumen elements, can also vary significantly depending on the appropriate system control.

[0075] Other possible implementations of the invention also include combinations of features or embodiments described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In such cases, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0076] 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 with reference to preferred embodiments and the accompanying figures.

[0077] They show

[0078] Fig. 1 shows a schematic perspective view of an embodiment of a known dishwasher, in particular a known household dishwasher;

[0079] Fig. 2A is a schematic perspective view from the front of a first embodiment of a washing container and a container door of a dishwasher according to the invention;

[0080] Fig. 2B is a schematic perspective view from the rear of the first embodiment of a washing container and a container door of a dishwasher according to the invention as shown in Fig. 2A;

[0081] Fig. 3A shows a schematic view of a second embodiment of a dishwasher according to the invention;

[0082] Fig. 3B a schematic view of a third embodiment of a dishwasher according to the invention; 202401677

[0083] 14 / 31

[0084] Fig. 3C shows a schematic view of a fourth embodiment of a dishwasher according to the invention;

[0085] Fig. 4A shows a schematic view of a fifth embodiment of a dishwasher according to the invention; and

[0086] Fig. 4B shows a schematic view of a sixth embodiment of a dishwasher according to the invention.

[0087] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0088] Fig. 1 shows a schematic perspective view of an embodiment of a known water-bearing household appliance 1. The water-bearing household appliance is, in this case, a known dishwasher 1, in particular a known household dishwasher.

[0089] The dishwasher 1 typically has a wash chamber 2 designed as a work area for receiving the items to be cleaned, which can be sealed, in particular watertight, by a chamber door 3. A sealing device may be provided between the chamber door 3 and the wash chamber 2 for this purpose. The wash chamber 2 is preferably cuboid in shape. The wash chamber 2 may be arranged in a housing of the dishwasher 1. The wash chamber 2 and the chamber door 3 may form a wash chamber 4 for washing the items.

[0090] The container door 3 is shown in its open position in Fig. 1. The container door 3 can be opened or closed by pivoting it about a pivot axis 5 provided at one lower end of the container door 3. The container door 3 can be used to open or close a front loading opening 6 of the washing container 2.

[0091] The washing tank 2, for example, is cuboid in shape and comprises a tank base 7, a tank ceiling 8 arranged opposite the tank base 7, a tank rear wall 9 arranged opposite the closed tank door 3, and two tank side walls 10, 11 arranged opposite each other. The tank base 7, the tank ceiling 8, the tank rear wall 9, and the 202401677

[0092] 15 / 31

[0093] Container side walls 10, 11 can, for example, be made of a stainless steel sheet.

[0094] The dishwasher 1 further comprises at least one load holder 12, 13, and 14. The load holder 12, 13, and 14 is preferably a loading level of the dishwasher 1. In particular, several load holders 12, 13, and 14 can be provided, wherein a load holder 12 can be a lower dish rack, a load holder 13 an upper dish rack, and a load holder 14 a cutlery drawer of the dishwasher 1. The several load holders 12, 13, and 14 are preferably arranged one above the other in the wash chamber 2. Each load holder 12, 13, and 14 can be selectively moved into the wash chamber 2, particularly linearly, in an insertion direction E (arrow) or out of it, particularly linearly, in an extension direction A (arrow).

[0095] Fig. 2A shows a schematic perspective view from the front of a first embodiment of a washing container 2 and a container door 3 of a dishwasher 1 according to the invention.

[0096] The illustrated dishwasher 1 comprises a wash container 2 for receiving items to be washed, which includes several wash container walls 7 to 11, preferably made of metal (see Fig. 1), and which is preferably provided at the front with a loading opening 6 for loading items, which can be closed at least temporarily by a container door 3. In Fig. 2A, the container door 3, the container base 7, the right container side wall 11, the container ceiling 8, and the container rear wall 9 are at least partially visible.

[0097] In this view it can be seen that at least on the outside of the container door 3, the container bottom 7, the right side wall of the container 11 and the container roof 8 at least one sound damping system 16 is applied, which comprises a plurality of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0098] The individual small-area sound damping element 17, in particular bitumen element, of the sound damping system 16 is shown in Fig. 2A as 202401677

[0099] 16 / 31

[0100] Surface geometry 18 is a square 19 (see also Fig. 3A). Alternatively or additionally, a single small-area sound damping element 17, in particular a bitumen element, of the sound damping system 16 can also have as its surface geometry 18 a circle 21 (see Fig. 3C), an oval, a triangle, a quadrilateral, a rectangle, or a polygon, in particular a hexagon 20 (see Fig. 3B) or an octagon.

[0101] The multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 exhibit approximately identical or even identical surface geometries 18 in Fig. 2A (see Fig. 3A, Fig. 3B, Fig. 3C and Fig. 4A). Alternatively or additionally, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can also exhibit predominantly identical (see Fig. 4A), in particular or predominantly different, in particular different, surface geometries 18 (see Fig. 4B).

[0102] The multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 are arranged in a structured pattern across the entire surface in Fig. 2A, shown here with identical parameters (“uniform distribution”; see Fig. 3A, Fig. 3B and Fig. 3C) or alternatively with unequal parameters (“repeating distribution” or “uneven distribution”; see Fig. 4A and Fig. B). Alternatively or additionally, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can also be arranged in a structured pattern, at least in certain areas, preferably for the most part (see Fig. 3A, Fig. 3B and Fig. 3C).Furthermore, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can be arranged in an unstructured manner, at least in certain areas, preferably for the most part, and in particular over the entire surface (see Fig. 4B). Furthermore, each pair of adjacent and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can have predominantly, in particular completely, the same or approximately the same minimum distances (MA 202401677).

[0103] 17 / 31 (see Fig. 3A, Fig. 3B and Fig. 3C) and alternatively, each pair of adjacent and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can have, in particular completely, unequal or approximately unequal minimum distances MA (see Fig. 4A and Fig. 4B).

[0104] The descriptions in Fig. 3A continue to apply to the small-area sound damping element 17, in particular the bitumen element, of the sound damping system 16.

[0105] Fig. 2B shows a schematic perspective view from the rear of the first embodiment of a washing container 2 and a non-visible container door 3 of a dishwasher 1 according to the invention as shown in Fig. 2A.

[0106] In this view it can be seen that at least on the outside of the container bottom 7, the container rear wall 9, the left container side wall 10 and the container roof 8 at least one sound damping system 16 is applied, which comprises a plurality of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0107] The multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 corresponds to the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 described in Fig. 2A. Therefore, reference is made here to the description of Fig. 2A.

[0108] The descriptions in Fig. 3A continue to apply to the respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16.

[0109] Fig. 3A shows a schematic view of a second embodiment of a dishwasher according to the invention 1. 202401677

[0110] 18 / 31

[0111] Even in this view, which only schematically shows a flushing tank wall, for example the right side wall of the tank 11, or a tank door 3, it can be seen that at least on the outside at least one sound damping system 16 is applied, which comprises a large number of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0112] The individual small-area sound damping element 17, in particular a bitumen element, of the sound damping system 16 has a square 19 as its surface geometry 18 in Fig. 3A. Alternatively or additionally, an individual small-area sound damping element 17, in particular a bitumen element, of the sound damping system 16 can also have a circle 21 (see Fig. 3C), an oval, a triangle, a quadrilateral, a rectangle, or a polygon, in particular a hexagon 20 (see Fig. 3B) or an octagon, as its surface geometry 18.

[0113] The multitude of non-connected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 exhibit approximately identical or even identical surface geometries 18 as shown in Fig. 3A (see Fig. 2A, Fig. 3B, Fig. 3C and Fig. 4A). Alternatively or additionally, the multitude of non-connected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can also exhibit predominantly identical (see Fig. 4A), in particular or predominantly different, in particular different, surface geometries 18 (see Fig. 4B).

[0114] The descriptions in Fig. 2A continue to apply to the numerous non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16.

[0115] The respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16 also has

[0116] - an area 17. F of 0.1 cm 2 up to 160 cm 2 , preferably 0.15 cm 2 up to 100 cm 2 , especially 0.25 mm 2 up to 70 cm 2 , 202401677

[0117] 19 / 31

[0118] - has a horizontal length 17. LH and / or a vertical length 17. LV of 10 mm to 125 mm, preferably 12 mm to 100 mm, in particular of 15 mm to 80 mm.

[0119] - a thickness 17.D of 0.5 mm to 10 mm, preferably of 1 mm to 8 mm, in particular of 1 to 5 mm, and / or

[0120] - a basis weight 17.FG of 1 kg / m² 2 up to 15 kg / m 2 , preferably of 2 kg / m² 2 up to 12 kg / m² 2 , especially of 2 kg / m² 2 up to 10 kg / m² 2 , on.

[0121] Furthermore, the rinsing tank wall, for example the right side wall 11 of the tank, or the tank door 3, has a coverage rate BQ of 0.10 to 0.90, preferably 0.20 to 0.80 (see Fig. 3B, Fig. 3C and Fig. 4B), particularly in the range of 0.25 (see Fig. 4A and Fig. 4B), wherein the respective coverage rate BQ is the quotient of the area F covered with the sound damping elements 17, in particular bitumen elements, of the sound damping system 16 and the total area FG of the rinsing tank wall, for example the right side wall 11 of the tank, or the tank door 3.

[0122] Fig. 3B shows a schematic view of a third embodiment of a dishwasher 1 according to the invention.

[0123] Even in this view, which again only schematically shows a flushing tank wall, for example the right side wall of the tank 11, or a tank door 3, it can be seen that at least on the outside at least one sound damping system 16 is applied, which comprises a large number of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0124] The individual small-area sound dampening element 17, in particular a bitumen element, of the sound dampening system 16 has a polygon 20, in particular a hexagon, as its surface geometry 18 in Fig. 3B. Alternatively or additionally, an individual small-area sound dampening element, in particular a bitumen element, can also have a circle 21 (see Fig. 3C), an oval, a triangle, a quadrilateral, a rectangle, a square 19 (see Fig. 3A), or a polygon, in particular an octagon, as its surface geometry 18. 202401677

[0125] 20 / 31

[0126] The multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 exhibit approximately identical or even identical surface geometries 18 in Fig. 3B (see Fig. 2A, Fig. 3A, Fig. 3C and Fig. 4A). Alternatively or additionally, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, can also exhibit predominantly identical (see Fig. 4A), in particular or predominantly different, in particular different, surface geometries 18 (see Fig. 4B).

[0127] The descriptions in Fig. 2A continue to apply to the numerous non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16.

[0128] The descriptions in Fig. 3A continue to apply to the respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16.

[0129] Furthermore, the flushing tank wall, for example the right side wall of the tank 11, or the tank door 3 has an occupancy rate BQ of > 0.80, where the respective occupancy rate BQ is the quotient of the area F covered with the sound damping elements 17, in particular bitumen elements, of the sound damping system 16 and the total area FG of the flushing tank wall, for example the right side wall of the tank 11, or the tank door 3.

[0130] Fig. 3C shows a schematic view of a fourth embodiment of a dishwasher according to the invention 1.

[0131] This view, which again only schematically shows a flushing tank wall, for example the right side wall 11, or a tank door 3, also shows that at least one sound dampening system 16 is applied to the outside, comprising a large number of non-interconnected and small-area sound dampening elements 17, in particular bitumen elements. 202401677

[0132] 21 / 31

[0133] The individual small-area sound damping element 17, in particular a bitumen element, of the sound damping system 16 has a circle 21 as its surface geometry 18 in Fig. 3C. Alternatively or additionally, an individual small-area sound damping element 17, in particular a bitumen element, can also have an oval, a triangle, a quadrilateral, a rectangle, a square (see Fig. 3A) or a polygon, in particular a hexagon (see Fig. 3B) or an octagon, as its surface geometry 18.

[0134] The multitude of non-connected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 exhibit approximately identical or even identical surface geometries 18 in Fig. 3C (see Fig. 2A, Fig. 3A, Fig. 3B and Fig. 4A). Alternatively or additionally, the multitude of non-connected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can also exhibit predominantly identical (see Fig. 4A), in particular or predominantly different, in particular different, surface geometries 18 (see Fig. 4B).

[0135] The descriptions in Fig. 2A continue to apply to the numerous non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16.

[0136] The descriptions in Fig. 3A continue to apply to the respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16.

[0137] Furthermore, the flushing tank wall, for example the right tank side wall 11, or the tank door 3, has an occupancy rate BQ of > 0.80, where the respective occupancy rate BQ is the quotient of the area F covered with the sound damping elements 17, in particular bitumen elements, of the sound damping system 16 and the total area FG of the flushing tank wall, for example the right tank side wall 11, or the tank door 3. 202401677

[0138] 22 / 31

[0139] For the three embodiments shown in Figures 3A to 3C, there may be a further embodiment, each only indicated. The multitude of non-interconnected and small-area sound-dampening elements 17, in particular bitumen elements, of the sound-dampening system 16 may be applied only partially to the area of ​​the wash tank wall, for example, the right side wall area 11.B (dashed line), or the door area 3.B (dashed line), which exhibits a greater operating vibration than other wash tank wall areas 11.B, wherein the at least one wash tank wall area 11.B and / or one door area 3.B with greater operating vibration is a droplet impact area, which is excited by droplets impacting during operation. The illustrations of the further embodiments, each only indicated, are merely exemplary.They can vary in size, location, orientation, and the like.

[0140] Fig. 4A shows a schematic view of a fifth embodiment of a dishwasher 1 according to the invention.

[0141] Furthermore, in this view, which only schematically shows a flushing tank wall, for example the right side wall of the tank 11, or a tank door 3, it can be seen that at least on the outside at least one sound damping system 16 is applied, which comprises a large number of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0142] The individual small-area sound dampening element 17, in particular a bitumen element, again has a square 19 as its surface geometry 18 in Fig. 4A. Alternatively or additionally, an individual small-area sound dampening element 17, in particular a bitumen element, of the sound dampening system 16 can also have a circle 21 (see Fig. 3C), an oval, a triangle, a quadrilateral, a rectangle, or a polygon, in particular a hexagon 20 (see Fig. 3B) or an octagon, as its surface geometry 18.

[0143] The numerous non-interconnected and small-area sound-dampening elements 17, in particular bitumen elements, of the sound-dampening system 16 exhibit approximately identical or even identical surface geometries 18 in Fig. 3A (see Fig. 2A, Fig. 3A, Fig. 3B and Fig. 3C). Alternatively or 202401677

[0144] 23 / 31 In addition, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 can also have predominantly the same (see Fig. 4A), in particular or predominantly different, especially different, surface geometries 18 (see Fig. 4B).

[0145] The descriptions in Fig. 2A continue to apply to the numerous non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16.

[0146] The descriptions in Fig. 3A continue to apply to the respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16.

[0147] Furthermore, the flushing tank wall, for example the right side wall 11 of the tank, or the tank door 3 has an occupancy rate BQ of approximately 0.25, where the respective occupancy rate BQ is the quotient of the area F covered with the sound damping elements 17, in particular bitumen elements, of the sound damping system 16 and the total area FG of the flushing tank wall, for example the right side wall 11 of the tank, or the tank door 3.

[0148] Fig. 4B shows a schematic view of a sixth embodiment of a dishwasher according to the invention 1.

[0149] In this view, which only schematically shows a flushing tank wall, for example the right side wall of the tank 11, or a tank door 3, it can be seen that at least on the outside at least one sound damping system 16 is applied, which comprises a large number of non-interconnected and small-area sound damping elements 17, in particular bitumen elements.

[0150] The respective small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 have different contours 22 as surface geometry 18 in Fig. 4B. The contours 22 comprise 202401677

[0151] 24 / 31 as shown a square, a circle, a quadrilateral, a hexagon, a pentagon, a rhombus, a rectangle and a triangle.

[0152] The descriptions in Fig. 2A continue to apply to the numerous non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16.

[0153] The descriptions in Fig. 3A continue to apply to the respective small-area sound damping element 17, in particular bitumen element, of the sound damping system 16.

[0154] Furthermore, the flushing tank wall, for example the right side wall 11 of the tank, or the tank door 3, has an occupancy rate BQ of 0.10 to about 0.25, where the respective occupancy rate BQ is the quotient of the area F covered with the sound damping elements 17, in particular bitumen elements, of the sound damping system 16 and the total area FG of the flushing tank wall, for example the right side wall 11 of the tank, or the tank door 3.

[0155] The plurality of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 shown in Figures 2A to 4B are glued to the at least one flushing tank wall 7 to 11 and / or the tank door 3 by means of at least one adhesive 23, preferably by means of a hot melt adhesive, by means of a one- or multi-component adhesive and / or by means of a self-adhesive.

[0156] Alternatively, the multitude of non-interconnected and small-area sound damping elements 17, in particular bitumen elements, of the sound damping system 16 are applied as liquid material 24 to at least one flushing tank wall 7 to 11 and / or the tank door 3 and subsequently cooled or hardened.

[0157] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. 202401677

[0158] 25 / 31

[0159] Reference symbols used

[0160] 1 household appliance; dishwasher;

[0161] household dishwasher

[0162] 2 washing containers

[0163] 3 Container door

[0164] 3.B Container door area (dashed line)

[0165] 4. Dishwashing area

[0166] 5 swivel axes

[0167] 6 Feed opening

[0168] 7. Wash tank wall; tank bottom

[0169] 8. Sink wall; sink ceiling

[0170] 9. Sink wall; sink back wall

[0171] 10. Wash tank wall; left side wall of tank

[0172] 11. Sink wall; right side wall of the sink

[0173] 11. B Right side wall area of ​​the container (dashed line)

[0174] 12 Dishwashing basket; lower dish rack (lower basket)

[0175] 13 Dishwashing basket; upper dish rack (upper basket)

[0176] 14 Dishwashing trays; cutlery drawer

[0177] 15 Dishwashing tray

[0178] 16 Sound damping system

[0179] 17 Sound dampening element; bitumen element

[0180] 17.D Thickness

[0181] 17.F Area

[0182] 17.FG Basis weight 17.LH Horizontal length 17.LV Vertical length

[0183] 18 Surface geometry

[0184] 19 square

[0185] 20 Polygon; Hexagon

[0186] 21st district

[0187] 22 contour

[0188] 23 glue

[0189] 24 Liquid material 202401677

[0190] 26 / 31

[0191] A Extraction direction (arrow)

[0192] BQ occupancy rate

[0193] E Insertion direction (arrow)

[0194] F Occupied area

[0195] FG Total area

[0196] MA minimum distance

Claims

202401677 27 / 31 Patent claims 1. Dishwasher (1), in particular a household dishwasher, comprising at least a washing container (2) for receiving items to be washed, which comprises several washing container walls (7 to 11; 11) preferably made of metal and which is preferably provided at the front with a loading opening (6) for loading items to be washed, which can be closed at least temporarily by a container door (3), - wherein at least one sound dampening system (16) is applied to at least one rinsing tank wall (7 to 11; 11) and / or the tank door (3) at least on the outside and - wherein the sound damping system (16) comprises a plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements.

2. Dishwasher (1) according to claim 1, characterized in that the small-area sound damping element (17), in particular bitumen element, has an area (17. F) of 0.1 cm² 2 up to 160 cm 2 , preferably 0.15 cm 2 up to 100 cm 2 , especially 0.25 mm 2 up to 70 cm 2 , exhibits.

3. Dishwasher (1) according to claim 1 or 2, characterized in that the small-area sound damping element (17), in particular bitumen element, has a horizontal length (17. LH) and / or a vertical length (17. LV) of 10 mm to 125 mm, preferably 12 mm to 100 mm, in particular 15 mm to 80 mm.

4. Dishwasher (1) according to claim 1, 2 or 3, characterized in that the small-area sound damping element (17), in particular bitumen element, has a thickness (17. D) of 0.5 mm to 10 mm, preferably of 1 mm to 8 mm, in particular of 1 to 5 mm. 202401677 28 / 31 5. Dishwasher (1) according to one of the preceding claims, characterized in that the small-area sound damping element (17), in particular bitumen element, has a basis weight (17.FG) of 1 kg / m² 2 up to 15 kg / m 2 , preferably of 2 kg / m² 2 up to 12 kg / m² 2 , especially of 2 kg / m² 2 up to 10 kg / m² 2 , exhibits.

6. Dishwasher (1) according to one of the preceding claims, characterized in that the small-area sound damping element (17), in particular bitumen element, has as surface geometry (18) a circle (219), an oval, a triangle, a rectangle, a square (19) or a polygon, in particular a hexagon (20) or an octagon.

7. Dishwasher (1) according to claim 6, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, have predominantly the same, in particular identical, surface geometries (18) or predominantly different, in particular different, surface geometries (18).

8. Dishwasher (1) according to one of the preceding claims, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, are arranged in a structured manner at least in certain areas, preferably largely, in particular over the entire surface.

9. Dishwasher (1) according to claim 7, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, are arranged in an unstructured manner at least in certain areas, preferably mostly, in particular over the entire surface.

10. Dishwasher (1) according to one of the preceding claims, characterized in that two adjacent and small-area sound damping elements (17), in particular bitumen elements, are predominantly 202401677 29 / 31 in particular have complete, equal or nearly equal minimum distances (MV) of each other.

11. Dishwasher (1) according to one of the preceding claims, characterized in that each pair of adjacent and small-area sound damping elements (17), in particular bitumen elements, in particular completely, have unequal or approximately unequal minimum distances (MA).

12. Dishwasher (1) according to one of the preceding claims, characterized in that the at least one wash container wall (7 to 11; 11) and / or the container door (3) each has an occupancy rate (BG) of 0.10 to 0.90, preferably of 0.20 to 0.80, in particular in the range of 0.25, wherein the respective occupancy rate (BG) is the quotient of the area (F) covered with the sound damping elements (17), in particular bitumen elements, and the total area (FG) of the at least one wash container wall (7 to 11; 11) and / or the container door (3).

13. Dishwasher (1) according to one of the preceding claims, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, is only partially applied to at least one wash-tank wall area (11.B) and / or a tank door area (3.B), which has a greater operating vibration than other wash-tank wall areas (11.B), wherein the at least one wash-tank wall area (11.B) and / or a tank door area (3.B) with greater operating vibration is a droplet impact area, which is excited by droplets impacting during operation.

14. Dishwasher (1) according to one of the preceding claims, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, onto which at least one wash container wall (7 to 11; 11) and / or the container door (3) is glued by means of at least one adhesive (23), preferably by means of a 202401677 30 / 31 hot melt adhesive, using a one- or multi-component adhesive and / or using a self-adhesive.

15. Dishwasher (1) according to one of claims 1 to 13, characterized in that the plurality of non-interconnected and small-area sound damping elements (17), in particular bitumen elements, onto which at least one dishwashing container wall (7 to 11 ; 11) and / or the container door (3) is applied as liquid material (24) and subsequently cooled or hardened.

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