Dishwasher, especially household dishwasher

Abstract

Dishwasher (1), in particular a household dishwasher, with at least one component (50) made of at least one plastic, which is at least temporarily exposed to a washing or cleaning liquid during the operation of the dishwasher (1), - wherein the component (50) made of at least one plastic is provided at least partially, preferably predominantly, in particular completely, in its surface area directly exposed to the rinsing or cleaning fluid with a surface texture (100) in order to thereby reduce the surface energy of the component surface, which is present in the area provided with the surface texture (100), and thus preferably achieve a significantly improved drying behavior on the component (50) made of at least one plastic directly exposed to the rinsing or cleaning fluid, and - wherein the component (50) is made entirely of polypropylene, polyethylene, copolymers thereof or of a regenerate of these plastics.

Description

[0001] The invention relates to a dishwasher, in particular a household dishwasher, with at least one component made of at least one plastic, which is at least temporarily exposed to a rinsing or cleaning fluid during the operation of the dishwasher.

[0002] In water-bearing household appliances, such as dishwashers or washing machines, it is common practice to manufacture the molded parts and assemblies that come into contact with the washing or cleaning fluid, such as the wash tub, base, door, or dish rack, from a high-quality polymeric plastic, such as polypropylene, or at least to coat the surfaces of these parts with a suitable material, such as polyamide. These measures serve both to protect the molded parts and assemblies that come into contact with the washing or cleaning fluid from corrosion and to protect the dishes or cutlery placed in a dish rack, especially a basket.

[0003] The common practice of coating a dish rack, especially a dish or cutlery basket, with a high-quality polymer plastic cannot prevent water droplets from clinging to the basket frame at the contact points between the plastic and the dishes or cutlery. This is due to the plastic's less-than-ideal drainage properties. These droplets often remain on the basket even during the drying cycle. Inadequate water drainage negatively impacts the amount of water needed for optimal washing and cleaning, thus reducing water and heating energy consumption and promoting water spots on the dishes and cutlery. Consequently, achieving optimal cleaning results is not always possible. Furthermore, completely removing these trapped water droplets requires increased drying power and / or a longer program duration.

[0004] To improve these negative properties of the loading elements, it has also become known to equip the dish racks or cutlery drawers with additional drip trays. For example, the mesh and grids of the basket racks can be designed with a cutting edge and / or sawtooth profile. However, these measures complicate and increase the cost of manufacturing the dish racks or cutlery drawers from a high-quality polymer and only partially alleviate the problem.

[0005] Furthermore, there is a problem with components made of or coated with high-quality polymeric plastics becoming discolored over time during the dishwashing process, typically turning yellow or a yellowish-red. This discoloration occurs on virtually all plastic parts exposed to the dishwashing liquid, both inside the dishwashing container and along the water supply line. The yellowing is particularly noticeable on plastic-coated dish racks, cutlery baskets, and cutlery drawers; however, it primarily affects polypropylene plastic parts. It has been determined that this discoloration results, in part, from significant changes in dishwashing detergents and cleaning agents.Earlier cleaning agents containing chlorine had a bleaching effect that largely prevented discoloration of the plastic. Currently used cleaners replace chlorine with oxygen, but this oxygen bleaching can actually inhibit discoloration. However, plastic discoloration is primarily caused by carotene (beta-carotene), a fat-soluble natural pigment found in food residues rinsed from dishes.

[0006] The publication EP 1 145 681 A2 discloses a dishwashing basket with a plastic-coated wire frame, wherein the frame of the dishwashing basket is made of ordinary structural steel and is coated with a layer that distributes the water required for rinsing in a thin film on its surface. The plastic layer can have a surface roughness of Rz ≥ 5 µm, can be applied by means of a plastic coating process and / or consist essentially of polyamide, in particular polyamide 11 or polyamide 12.

[0007] German patent application DE 10 2011 089 114 A1 discloses a component of a household appliance which is wetted by a liquid and is provided on its surface in contact with the liquid with a coating that is at least hydrophobic. The coating is designed as a liquid boundary layer consisting of a substrate and a boundary liquid embedded therein, and the boundary liquid forms a liquid-repellent sliding layer relative to the liquid wetting the component. The component wetted by a liquid can be a detergent dispenser of a dishwasher or washing machine, a cooling surface of a refrigerator or freezer, a water reservoir of a steam iron, a water-receiving component of a kettle, a heating element of a washing machine, a door seal, a pump component, a heat exchanger component, or a dosing device component.

[0008] Document US 6,660,363 B1 discloses self-cleaning surfaces of objects which have an artificial surface structure of protrusions and depressions, wherein the distance between the protrusions is in the range of 5 to 200 µm and the height of the protrusions is in the range of 5 to 100 µm and at least the protrusions are made of hydrophobic polymers or durably hydrophobized materials and the protrusions are not removable by water or by water with detergents.

[0009] German patent application DE 10 2008 055 093 A1 discloses a household appliance sieve made of a sieve base material with a hydrophobic coating for filtering out particles, in particular lint, from a process water channel or a process air channel, wherein the sieve base material consists of a material that is resistant at temperatures of 160 °C or higher. The sieve base material preferably consists of a corrosion-resistant material, in particular stainless steel, a stainless steel alloy, aluminum, or an aluminum alloy.

[0010] From German patent application DE 198 42 095 A1, it is known, for example, to improve the wetting properties of plastic components by subsequently activating their surfaces using fluorination or plasma treatment, in particular low-pressure plasma treatment. In this process, the plastic surface of the component is activated in a vacuum chamber by means of fluorination or plasma treatment, in particular low-pressure plasma treatment, in order to reduce the surface tension of the originally highly hydrophobic plastic surface. The subsequently activated plastic surfaces are preferably surfaces of plastic components that are directly exposed to washing or cleaning fluid in dishwashers or washing machines.In particular, molded parts and / or assemblies made entirely from a polymeric material such as polypropylene, polyethylene, their copolymers, polyamide, or a regenerate of these plastics, or coated with this plastic and integrated into the dishwashing water circuit, can be treated. Furthermore, dishwashing containers or dishware carriers in the form of cutlery baskets and cutlery drawers can be treated to improve water drainage and / or prevent material discoloration.

[0011] One disadvantage of this subsequent activation process is that, with increasing washing cycle numbers, the activation of the plastic surface of the component made of at least one type of plastic is again equalized, and thus the formerly improved wetting properties are noticeably worsened again with the effect of a formerly improved drying.

[0012] Against this background, an object of the present invention is to provide a dishwasher, in particular a household dishwasher, which comprises at least one component made of at least one plastic, which is at least temporarily exposed to a washing or cleaning liquid during the operation of the dishwasher, in particular the household dishwasher, with a significantly improved drying process, in particular drying behavior, and to maintain the effectiveness of the drying improvement continuously at a desired level.

[0013] To solve the problem according to the invention, a dishwasher, in particular a household dishwasher, is proposed which has at least one component made of at least one type of plastic, which is at least temporarily exposed to a washing or cleaning fluid during operation of the dishwasher, wherein the component made of at least one type of plastic is provided with a surface texture at least partially, preferably predominantly, in particular completely, in its surface area directly exposed to the washing or cleaning fluid, in order to thereby reduce the surface energy of the component surface in the area provided with the surface texture and thus preferably achieve a significantly improved drying behavior on the component made of at least one type of plastic directly exposed to the washing or cleaning fluid.and wherein the component is made entirely from a polymeric material, such as polypropylene, polyethylene, their copolymers, or from a recycled material of these plastics. The component made from at least one plastic can be a molded part and / or a part of an assembly.

[0014] Surface graining generally refers to the structuring of a surface, which is largely responsible for its haptic and visual properties. The term was originally used for the surface structure of leather, but was later applied to industrially produced surface graining. This is ubiquitous on injection-molded plastic parts and synthetic leather. Surface graining can influence the grip or feel of a surface, as well as create a characteristic optical scattering behavior and visual appearance.

[0015] Applying a surface texture to the surface area of ​​the component made of at least one type of plastic that is directly exposed to the rinsing or cleaning fluid increases the total surface energy of the component surface to approximately 20 mN / m due to an increase in both the polar surface energy of the component surface, i.e., the permanent dipole attraction forces through functional chemical molecular ends and hydrogen bonds, and the dispersed surface energy of the component surface, i.e., the temporary, i.e., non-permanent fluctuations in the electron density in the molecule as a result of temporary dipoles and acting van der Waals forces.

[0016] Furthermore, the surface etching according to the invention of the surface area of ​​a component made of at least one plastic that is directly exposed to the rinsing or cleaning fluid is, in contrast to the known and previously described surface activation of a component made of at least one plastic, of a permanent effect.

[0017] Experiments have shown that the polar components of the total surface energy of the component surface, i.e. the sum of the polar surface energy of the component surface and the dispersed surface energy of the component surface, have already increased by about 50% compared to the polar surface energy of the component surface of an untreated mass-produced part simply by roughening the surface of the tool used to manufacture the component from at least one type of plastic.

[0018] Another effect on the wettability of a surface by water arises from the force of gravity. A liquid must find the energetically most favorable state between its own surface tension, which seeks to reach the energetically most favorable surface, and gravity, which seeks to collect as much water as possible at the lowest possible point. With large quantities of water in a dishwasher, especially a household dishwasher, gravity gains the upper hand, and the water tries to collect as close as possible to the lowest point in the dishwasher.

[0019] Applying a surface texture to a component made of at least one type of plastic is typically done during its production in an injection mold of an injection molding machine. Standardized surface textures can preferably be introduced into the relevant surfaces of the injection mold cavities using a simple etching process. Such surface textures can also be used to improve the feel and to conceal surface defects, such as mold parting lines. The material selection for the injection mold and its heat treatment play a crucial role in the final surface texture result. Even during material procurement, it must be ensured that only steels suitable for surface texture are used.All relevant tool components, such as slides, inserts, and the like, should be made of the same material to avoid potential risks of surface graining failure and gloss level. Suitable materials for the injection mold include, for example, 40 CrMnNiMo 8-6-4, 40 CrMnMo 7, or X37 CrMoV 5-1, all of which may also be available in a special alloy.

[0020] The materials listed are so-called "mass-produced products", which are usually available at favorable conditions and which exceed the requirements placed on them.

[0021] In a first embodiment, the component, made of at least one type of plastic, is a wash basin, a wash basin base, a wash basin door, a spray arm, a heat exchanger mounting screw, an addition lid, or a dishware carrier, such as a cutlery basket, a cutlery drawer, a shelf, or the like. With these exemplary components made of at least one type of plastic, the advantages of the invention, as described above, are fully realized.

[0022] In a further embodiment, the component, made of at least one plastic, has a surface texture depth in the range of 0.03 to 0.1 mm, preferably 0.04 to 0.07 mm, and in particular approximately 0.05 mm, in the area of ​​its surface texture, and / or a demolding taper in the range of 1.5 to 3°, preferably 2 to 3°, and in particular approximately 2.5°. The optimal depth of the permanently present surface texture, as the level of the reduced surface energy of the component surface, is determined by the size of the demolding taper and its optical appearance.

[0023] In a further embodiment, the component, made of at least one plastic, has a ratio of closed area to open surface texture area of ​​1.5 to 0.8, preferably 1.2 to 0.9, and in particular approximately 1, in the area of ​​its surface texture. With these exemplary ratios, the advantages of the invention, as described above, are fully realized.

[0024] In a further embodiment, the surface texture of the component, made of at least one plastic, comprises a plurality of surface texture contours, which have spherical, rectangular or approximately rectangular, triangular or approximately triangular, and / or polygonal cross-sectional contours. The aforementioned cross-sectional contours can be manufactured cost-effectively and reliably.

[0025] In another embodiment, the surface texture of the component has a robust structure with a grain size of 240 (etch depth in the injection mold > 0.10 mm), a fine structure with a grain size of 320 (etch depth in the injection mold of 0.04 to 0.10 mm), or a very fine structure with a grain size of 400 (etch depth in the injection mold of 0.01 to 0.04 mm). The structures listed as examples fully meet the requirements.

[0026] In a further embodiment, the surface texture of the component, made of at least one plastic, is designed such that it has a total surface energy of the component surface in the range of 15 to 25 mN / m, preferably 18 to 23 mN / m, and particularly approximately 20 mN / m. For example, the wettability of water on a (polypropylene) surface is best when the difference in surface energies of the component surface (H₂O = 72.8 mN / m; PP = 32.0 mN / m) is zero.

[0027] The surface texture according to the invention can, in principle, be provided on any surface area of ​​a component made of at least one type of plastic which, during operation of the machine, is at least temporarily directly exposed to a liquid. The machine can be, for example, a dishwasher, in particular a household dishwasher, a washing machine, in particular a household washing machine, a dryer, in particular a household dryer, or the like.

[0028] Further advantageous embodiments and aspects of the dishwasher, in particular the household dishwasher, are the subject of the dependent claims and the exemplary embodiments of the dishwasher, in particular the household dishwasher, described below. The dishwasher, in particular the household dishwasher, will be explained in more detail below with reference to preferred embodiments and the accompanying figures.

[0029] They show Fig. 1 a schematic perspective view of an embodiment of a dishwasher according to the prior art; Fig. 2 a schematic perspective view of an embodiment of a cutlery basket for a dishwasher; Fig. 3 a schematic perspective view of an embodiment of a cutlery drawer for a dishwasher; Fig. 4 a schematic perspective view of an embodiment of a shelf for a dishwasher; Fig. 5 a sectional view of a preferred embodiment of a surface texture of a component for a dishwasher; and Fig. 6 a detailed view of the in the Fig. 5. Sectional view of a surface texture of a component for a dishwasher.

[0030] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0031] The Fig. Figure 1 shows a schematic perspective view of a household appliance, particularly one that carries water. The household appliance 1 could be, for example, a dishwasher, a washing machine, a dryer, or the like. In the Fig. Figure 1 shows a dishwasher according to the state of the art, in particular a household dishwasher.

[0032] The dishwasher 1 has a receiving area 2, which can be sealed, in particular watertight, by a wash chamber door 3. For this purpose, a sealing device can be provided between the wash chamber door 3 and the receiving area 2. The receiving area 2 can be a wash chamber which is located in the Fig. The receiving area 2 is preferably cuboid in shape. In particular, the receiving area 2 can be made of sheet steel. Alternatively, the receiving area 2 can be made, at least partially, of a plastic material. The receiving area 2 and the wash chamber door 3 can form a wash chamber 4 for washing items. The receiving area 2 can be arranged inside a housing of the dishwasher 1.

[0033] The sink door 3 is in the Fig. Figure 1 shows the door 3 in its open position. The washbasin door 3 can be opened or closed by pivoting it about a pivot axis 5 provided at one lower end of the door 3. The receiving area 2 has a wall 6 with a washbasin base 7, a ceiling 8 opposite the washbasin base 7, a rear wall 9 opposite the washbasin door 3, and two opposing side walls 10, 11. The washbasin base 7, the ceiling 8, the rear wall 9, and the side walls 10, 11 can, for example, be made of stainless steel sheet metal. Alternatively, the washbasin base 7 can, for example, be made of a plastic material.

[0034] The dishwasher 1 further comprises at least one load holder 12. In particular, several load holders 12 may be provided, each of which may be a lower basket, an upper basket, or a cutlery drawer of the dishwasher 1. The several load holders 12 are preferably arranged one above the other in the receiving area 2. Each load holder 12 can be selectively moved into or out of the receiving area 2. In particular, each load holder 12 can be pushed into the receiving area 2 in an insertion direction E (arrow) and pulled out of the receiving area 2 in an extension direction A (arrow) opposite to the insertion direction E (arrow).

[0035] It is now provided that at least one of the dishwashing compartments 12, i.e. the lower basket, the upper basket or the cutlery drawer, and / or a cutlery basket not shown, of the dishwasher 1 consists of at least one component 50 made of at least one plastic, which is at least temporarily exposed to a washing or cleaning fluid during the operation of the dishwasher 1.The component 50 made of at least one plastic is provided at least partially, preferably predominantly, in particular completely, in its surface area directly exposed to the rinsing or cleaning fluid with a surface texture 100 in order to thereby reduce the surface energy of the component surface, which is present in the area provided with the surface texture 100, and thus preferably achieve a significantly improved drying behavior on the component 50 made of at least one plastic directly exposed to the rinsing or cleaning fluid.

[0036] If, in addition, the wash tank, comprising the ceiling 8, the rear wall 9 and the two side walls 10, 11, the wash base 7 and / or the wash tank door 3, a spray arm (not shown, but known to those skilled in the art), a heat exchanger mounting screw (not shown, but known to those skilled in the art) and / or an add-on lid (not shown, but known to those skilled in the art) are also made of a high-quality polymeric plastic, then this at least one plastic component 50 can also be provided with a surface texture 100, at least in its surface area directly exposed to the wash or cleaning fluid.

[0037] The component 50 made of at least one plastic can be made entirely of a polymeric material, such as polypropylene, polyethylene, their copolymers, polyamide or a regenerate of these plastics, or be coated with this plastic.

[0038] The Fig. Figure 2 shows a schematic perspective view of an embodiment of a dishwashing basket 12 in the form of a cutlery basket 13 for a dishwasher (compare Fig. 1) Such a cutlery basket 13 is disclosed and illustrated, for example, in the publication DE 10 2007 057 510 A1. The relevant disclosure content of this publication is hereby made the subject of the present disclosure.

[0039] The cutlery basket 13, made of at least one plastic, is provided at least partially, preferably predominantly, and in particular completely, in its surface area directly exposed to the rinsing or cleaning fluid with a surface texture 100 in order to thereby reduce the surface energy of the component surface, which is present in the area provided with the surface texture 100, and thus preferably achieve a significantly improved drying behavior on the cutlery basket 13, made of at least one plastic, which is directly exposed to the rinsing or cleaning fluid.

[0040] The one in Fig. The cutlery basket 13 shown in schematic perspective view 2 can be part of the one in the Fig. 1 shown in the invention dishwasher 1.

[0041] The Fig. Figure 3 shows a schematic perspective view of an embodiment of a dishwashing tray 12 in the form of a cutlery drawer 14 for a dishwasher (compare Figure 3). Fig. 1) Such a cutlery drawer 14 is disclosed and illustrated, for example, in the publications DE 10 2011 080 842 A1 and DE 10 2011 081 774 A1. The disclosure content of these publications is hereby made the subject of the present disclosure.

[0042] The cutlery drawer 14, made of at least one plastic, is at least partially, preferably predominantly, and in particular completely, provided with a surface texture 100 in its surface area directly exposed to the rinsing or cleaning fluid, in order to achieve a reduction in the surface energy of the component surface, which is present in the area provided with the surface texture 100, and thus preferably a significantly improved drying behavior on the cutlery drawer 14, made of at least one plastic, which is directly exposed to the rinsing or cleaning fluid.

[0043] The one in Fig. Cutlery drawer 14, shown in schematic perspective view 3, can be part of the set in the Fig. 1 shown in the invention dishwasher 1.

[0044] The Fig. Figure 4 shows a schematic perspective view of an embodiment of a dishwashing tray 12 in the form of a shelf 15, in particular a cutlery shelf or a knife shelf, for a dishwasher (compare Figure 4). Fig. 1) Such a storage device 15 is disclosed and illustrated, for example, in publication DE 10 2009 027 616 A1. The relevant disclosure content of this publication is hereby made the subject of the present disclosure.

[0045] The tray 15 made of at least one plastic is at least partially, preferably predominantly, in particular completely, provided with a surface texture 100 in its surface area directly exposed to the rinsing or cleaning fluid, in order to thereby reduce the surface energy of the component surface, which is present in the area provided with the surface texture 100, and thus preferably achieve a significantly improved drying behavior on the tray 15 made of at least one plastic directly exposed to the rinsing or cleaning fluid.

[0046] The one in Fig. The storage compartment 15 shown in schematic perspective view 4 can be part of the one in the Fig. 1 shown in the invention dishwasher 1.

[0047] The Fig. Figure 5 shows a sectional view of a preferred embodiment of a surface texture 100 of a component 50 made of at least one plastic for a dishwasher 1 (compare Figure 5). Fig. 1).

[0048] The component 50, made of at least one type of plastic, can be one of the aforementioned components 50 for a dishwasher 1 (compare Fig. 1), such as a dishwashing container 12 in the form of a cutlery basket 13 (compare Fig. 2), a cutlery drawer 14 (compare Fig. 3) or a storage area 15 (compare Fig. 4), a wall 6 (compare Fig. 1) in the form of a sink base 7, a ceiling 8, a rear wall 9 or a side wall 10, 11, a sink container door 3, a spray arm known to a person skilled in the art, a heat exchanger mounting screw known to a person skilled in the art or an addition lid known to a person skilled in the art.

[0049] The component 50, made of at least one plastic, has a surface texture depth 100.T in the range of 0.03 to 0.1 mm, preferably 0.04 to 0.07 mm, and in particular approximately 0.05 mm, in the area of ​​its surface texture 100.

[0050] Furthermore, the component 50, made of at least one plastic, has a ratio of closed area 100.FG to open surface texture area 100.FO of 1.5 to 0.8, preferably 1.2 to 0.9, in particular of about 1 to 1, in the area of ​​its surface texture 100.

[0051] Furthermore, the surface texture 100 of component 50 made of at least one plastic has a strong structure 100.S with grain size 240, a fine structure with grain size 320 or a very fine structure with grain size 400.

[0052] The surface texture 100 of the component 50 made of at least one plastic is also designed such that it has a total surface energy 100.E of the component surface in the range of 15 to 25 mN / m, preferably 18 to 23 mN / m, in particular about 20 mN / m.

[0053] The Fig. Figure 6 shows a detailed view of the [unclear text]. Fig. Sectional view of a surface texture 100 of a component 50 made of at least one plastic for a dishwasher 1 (see Figure 5) shown in Figure 5 (see Figure 5). Fig. 1).

[0054] The component 50 made of at least one plastic has a demolding taper 100.EK in the area of ​​its surface texture 100 in the range of 1.5 to 3°, preferably 2 to 3°, in particular of about 2.5°.

[0055] The surface texture 100 of the component 50 made of at least one plastic further comprises a plurality of surface texture contours 100.K, which have spherical, rectangular or approximately rectangular, triangular or approximately triangular and / or polygonal cross-sectional contours.

[0056] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. Reference symbol list 1 household appliance; dishwasher; household dishwasher 2. Receiving area; rinsing container 3 Dishwasher door 4 wash chambers 5 swivel axes 6 wall 7 Sink base 8 ceiling 9 Back panel 10 side wall 11 Side wall 12 Dishwashing tray 13 Cutlery basket 14 Cutlery drawer 15 Storage 50 components 100 surface graining 100E Total surface energy 100.EK demolding taper 100.FG Closed area 100.FO Open surface textured area 100.K Surface grain contour 100.S structure 100.T Surface grain depth A Extraction direction (arrow) E Insertion direction (arrow)

Claims

[1] Dishwasher (1), in particular a household dishwasher, with at least one component (50) made of at least one plastic, which is at least temporarily exposed to a washing or cleaning liquid during the operation of the dishwasher (1), - wherein the component (50) made of at least one plastic is provided at least partially, preferably predominantly, in particular completely, in its surface area directly exposed to the rinsing or cleaning fluid with a surface texture (100) in order to thereby reduce the surface energy of the component surface, which is present in the area provided with the surface texture (100), and thus preferably achieve a significantly improved drying behavior on the component (50) made of at least one plastic directly exposed to the rinsing or cleaning fluid, and - wherein the component (50) is made entirely of polypropylene, polyethylene, copolymers thereof or of a regenerate of these plastics. [2] Dishwasher (1) according to claim 1, characterized by , that the component (50) is made of at least one plastic and is a wash container (2), a wash base (7), a wash container door (3), a spray arm, a heat exchanger mounting screw, an addition lid or a wash item carrier (12), such as a cutlery basket (13), a cutlery drawer (14), a shelf (15) or the like. [3] Dishwasher (1) according to claim 1 or 2, characterized by , that the component (50) made of at least one plastic has a surface texture depth (100.T) in the range of 0.03 to 0.1 mm, preferably 0.04 to 0.07 mm, in particular about 0.05 mm, in the area of ​​its surface texture (100). [4] Dishwasher (1) according to claim 1, 2 or 3, characterized by, that the component (50) made of at least one plastic has a demolding conicity (100.EK) in the area of ​​its surface texture (100) in the range of 1.5 to 3°, preferably of 2 to 3°, in particular of about 2.5°. [5] Dishwasher (1) according to any one of the preceding claims, characterized by , that the component (50) made of at least one plastic has in the area of ​​its surface texture (100) a ratio of closed area (100.FG) to open surface texture area (100.FO) of 1.5 to 0.8, preferably of 1.2 to 0.9, in particular of about 1. [6] Dishwasher (1) according to any one of the preceding claims, characterized by , that the surface texture (100) of the component (50) made of at least one plastic comprises a plurality of surface texture contours (100.K) which have spherical, rectangular or approximately rectangular, triangular or approximately triangular and / or polygonal cross-sectional contours. [7] Dishwasher (1) according to any one of the preceding claims, characterized by , that the surface texture (100) of the component (50) made of at least one plastic has a strong structure (100.S) with grain size 240, a fine structure (100.S) with grain size 320 or a very fine structure (100.S) with grain size 400. [8] Dishwasher (1) according to any one of the preceding claims, characterized by , that the surface texture (100) of the component (50) made of at least one plastic is designed such that it has a total surface energy (100.E) in the range of 15 to 25 mN / m, preferably 18 to 23 mN / m, in particular about 20 mN / m.

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