Domestic dishwasher

Abstract

The invention relates to a domestic dishwasher (1) having a supply pipe (20) for supplying water (16) in the direction of a washing chamber (4) and having a flow bushing (33), which is inserted into the supply pipe (20), wherein the supply pipe (20) has a deflection (23) from a first direction (R1) in a second direction (R2) and, in a region of the deflection (23), an edge (29) on its inner wall (30), and wherein the flow bushing (33) has an outer wall (36), the shape of which is matched to the edge (29), and an inner wall (35) with a curved portion (36), which provides a deflecting radius (K) in the interior (I) of the supply pipe (20).

Description

[0001] household dishwasher

[0002] The present invention relates to a household dishwasher.

[0003] The water supply to one or more spray heads of a household dishwasher typically begins at the bottom of the dishwasher and travels vertically along the back wall, for example, through a vertical supply pipe. The water then travels horizontally, for example, through a horizontal supply pipe, towards the center of the wash chamber. There, it is directed to the spray heads, which distribute the water throughout the wash chamber. During the transition from the vertical to the horizontal direction and then to the spray heads, the water flow must be redirected several times, for example, by 90°. Increased hydraulic losses occur at these points of redirection.

[0004] Against this background, one object of the present invention is to provide an improved household dishwasher.

[0005] Accordingly, a household dishwasher is proposed. The household dishwasher has a supply pipe for feeding water towards a wash chamber and a flow sleeve inserted into the supply pipe. The supply pipe has a bend from one direction to another and, in the area of ​​the bend, an edge on its inner wall. Furthermore, the flow sleeve has an outer wall whose shape is adapted to the edge and an inner wall with a curved section that provides a deflection radius inside the supply pipe.

[0006] The flow sleeve with the curved section allows the edge of the supply pipe in the area of ​​deflection to be concealed, e.g., at least partially covered. In contrast, the surface within the supply pipe exposed to the flow of water does not have an edge but rather a deflection radius (i.e., radius of curvature). This reduces flow losses when supplying water, e.g., to a spray arm or the like. In particular, hydraulic losses can be significantly reduced by incorporating the curved section with the radius of curvature in the area of ​​deflection. For example, the hydraulic efficiency of, say, the upper spray arm can be improved by up to 7% with a radius of curvature of 3.5 mm, as the applicant determined based on a simulation.

[0007] By optimizing the water supply, the cleaning performance on the dishes can be increased with the same pump output, thus requiring no additional electrical energy consumption, resulting in a shorter wash cycle. Alternatively, the cleaning performance can be maintained while reducing the pump output and therefore the electrical energy consumption, resulting in energy savings and thus improving the energy efficiency of the household dishwasher. With reduced energy consumption, it is also possible to use a less powerful motor.

[0008] Furthermore, the flow sleeve offers more design options for manufacturing the feed pipe in the deflection area. Especially when the feed pipe and deflection are made of plastic using injection molding, the cores of the injection mold typically collide in the deflection area. These cores are inserted into the mold along the first and second directions and removed after the plastic pipe is manufactured (demolition). These cores create a sharp inner edge in the deflection area, which causes significant flow losses during operation of the household dishwasher. The proposed flow sleeve allows this sharp edge to be replaced by the deflection radius, eliminating the need to consider the demolding of the feed pipe.

[0009] Furthermore, if the feed pipe becomes clogged, the end user can clean it more easily, as there are no sharp edges to obstruct the cleaning process. A household dishwasher, for example, includes a wash tub that can be closed by a door, preferably a watertight one. The wash tub can be located within the housing of the household dishwasher. The wash tub and the door can form a wash chamber for washing dishes. The wash tub has a base, a ceiling opposite the base, a rear wall opposite the closed door, and two opposing side walls.

[0010] The household dishwasher further comprises at least one dishware holder. Preferably, several, for example three, dishware holders can be provided, wherein a first dishware holder can be a lower dishware holder or a lower basket, a second dishware holder can be an upper dishware holder or an upper basket, and a third dishware holder can be a cutlery drawer. The dishware holders are arranged, for example, one above the other in the wash tub. Each dishware holder can be selectively moved into or out of the wash tub.

[0011] The household dishwasher also has a supply device for feeding water or another fluid into the wash chamber. The supply device comprises the supply pipe and, for example, one or more additional supply pipes. Each supply pipe is designed to receive and direct water toward the wash chamber. The supply pipe is, for example, fluid-connected to one or more of the additional supply pipes. The supply device also includes a pump and similar components.

[0012] The deflection of the feed pipe is specifically a pipe deflection by means of which the water flowing through the feed pipe is directed from the first direction to the second direction. This deflection can also be referred to as flow redirection.

[0013] The feed pipe has a feed opening (i.e., an inlet) for supplying water to the feed pipe and a discharge opening (i.e., an outlet) for discharging water from the feed pipe towards the rinsing chamber. The flow bushing is preferably inserted into the feed pipe at the discharge opening (i.e., the outlet). However, the flow bushing can also be inserted into the feed pipe at the feed opening (i.e., the inlet).

[0014] The flow sleeve is attached to the feed pipe, for example, in a captive manner. The flow sleeve is attached to the feed pipe, for example, by a material bond and / or a form-fit connection. The flow sleeve is, for example, injection-molded into the feed pipe, bonded to the feed pipe, welded to the feed pipe, and / or attached to the feed pipe using engagement elements.

[0015] The flow sleeve, for example, has a closed circumference. The inner wall of the flow sleeve forms, in particular, a flow surface within the feed pipe, which is surrounded by water flowing through the feed pipe.

[0016] For example, the flow sleeve covers at least part of the edge of the feed pipe.

[0017] The edge on the inner wall of the feed pipe is specifically an inner edge of the feed pipe. The edge is, for example, a sharp edge. By way of example only, the edge has an angle in the range of 100° and 80° and / or 95° and 85°, e.g., an angle of 90°.

[0018] The flow sleeve is shaped such that its outer wall, in the area where it is positioned against the inner wall of the feed pipe, geometrically aligns with the inner wall of the feed pipe. In other words, the outer wall of the flow sleeve and the inner wall of the feed pipe are precisely aligned in the area where the flow sleeve is positioned against the inner wall of the feed pipe. For example, in this area, the outer wall of the flow sleeve and the inner wall of the feed pipe are arranged and / or fastened together in a fluid-tight manner.

[0019] The curved section has a radius of curvature, which provides the deflection radius inside the feed pipe. The radius of curvature is, in particular, a mathematical magnitude of the reciprocal of the curvature of the curved section. For example, the curved section has a locally constant curvature with a radius of curvature of .

[0020] According to one embodiment, the household dishwasher has a spray device. The feed pipe is fluidly connected to the spray device and is configured to supply water to the spray device. Furthermore, the deflection is located at an end of the feed pipe adjacent to the spray device.

[0021] This allows the deflection of the feed pipe (in this case also called "inlet pipe") towards the inlet opening of the spray device to be designed with low flow losses.

[0022] In this case, the feed pipe (inlet pipe) is attached, for example, to an upper rack of the dishwasher. The feed pipe is directly connected to the spray system via a fluid connection.

[0023] The spraying device has, for example, one or more spray arms.

[0024] According to another embodiment, the flow sleeve forms an outlet of the supply pipe for releasing water towards the rinsing chamber.

[0025] If the supply pipe is fluidly connected to a spray device and configured to supply water to the spray device (inlet pipe), then the flow sleeve can form an outlet of the inlet pipe for releasing water to the spray device. In this case, the flow sleeve is located at an end of the inlet pipe adjacent to the spray device.

[0026] According to a further embodiment, the first direction is a substantially horizontal direction of the household dishwasher, and the second direction is a substantially vertical direction of the household dishwasher. Throughout the application, a "substantially horizontal direction" includes a precisely horizontal direction as well as a direction that deviates from the precisely horizontal direction by ± 10° or less, by ± 5° or less, and / or by ± 1° or less.

[0027] Throughout the application, a "substantially vertical direction" includes a precisely vertical direction as well as a direction that deviates from the precisely vertical direction by ± 10° or less, by ± 5° or less and / or by ± 1° or less.

[0028] The first direction, for example, is a direction from a rear wall of the dishwasher towards a door (when the door is closed) of the dishwasher.

[0029] The second direction is, for example, directed towards the bottom of the dishwasher.

[0030] According to a further embodiment, the feed pipe has a docking point for connecting fluid to another feed pipe of the household dishwasher. Furthermore, the second feed pipe is configured to supply water to a spray device of the household dishwasher, and this feed pipe is positioned upstream of the second feed pipe with respect to the water flow direction.

[0031] This allows the deflection of the feed pipe (e.g. from the essentially vertical direction) towards the docking point (i.e. in the direction of an essentially horizontal direction) for docking the (e.g. essentially horizontal) further feed pipe to be designed with low flow losses.

[0032] In this case, the additional feed pipe is, for example, the inlet pipe described above.

[0033] According to another embodiment, the first direction is a substantially vertical direction of the household dishwasher, and the second direction is a substantially horizontal direction of the household dishwasher.

[0034] The first direction, for example, is from the bottom of the dishwasher towards the top. The second direction, for example, is from the back wall of the dishwasher towards the door (when the door is closed).

[0035] According to another embodiment, a common inner wall formed by an exposed section of the inner wall of the feed pipe and an inner wall of the flow sleeve is smooth.

[0036] "Smooth" here means in particular without protrusions, without steps (i.e., stepless) and / or without edges.

[0037] A smooth inner wall allows for low hydraulic losses and high hydraulic efficiency.

[0038] According to another embodiment, the feed pipe has a recess into which the flow bushing is inserted.

[0039] The flow bushing is attached, for example, by material bonding (e.g., injection molded, glued, welded) and / or form-fitting (e.g., by means of engagement elements) in the recess of the feed pipe.

[0040] According to a further embodiment, the flow sleeve has a closed circumference with a first circumferential section and a second circumferential section. Additionally, the feed tube has a recess into which the first circumferential section of the flow sleeve is inserted. Furthermore, the second circumferential section of the flow sleeve has a curved section and is arranged at the edge of the feed tube.

[0041] The recess is, for example, a recess in a radial direction of the feed pipe.

[0042] The curved section of the flow sleeve in the second circumferential section is, for example, attached to the inner edge of the feed pipe in such a way that the flow occurs around the curved section instead of the edge. For instance, the inner wall of the feed pipe has a first inner wall section that is arranged parallel to the first direction. Furthermore, the inner wall of the feed pipe has a second inner wall section that is arranged parallel to the second direction. The flow sleeve is, for example, only located in the region of the second inner wall section, so that the curved section continues the curve of the first inner wall section.

[0043] According to another embodiment, the wall thickness of the flow sleeve in the first circumferential section is essentially the same as the depth of the recess in a radial direction of the feed tube.

[0044] This includes "essentially the same size" as exactly the same size as the depth of the recess, as well as a deviation of 10% or less, 5% or less and / or 1% or less from the depth of the recess.

[0045] Consequently, the flow sleeve does not (essentially) protrude into the interior of the feed pipe at its first circumferential section.

[0046] In embodiments, the wall thickness of the flow sleeve in the first circumferential section can also be smaller than the depth of the recess in the radial direction of the feed tube.

[0047] According to a further embodiment, the feed pipe has at least one first engagement element, and the flow bushing has at least one second engagement element which engages with the at least one first engagement element.

[0048] The flow sleeve is thus attached to the feed pipe by means of at least one first and at least one second engagement element, e.g. in a captive manner.

[0049] For example, a snap-fit ​​connection is created by the at least one first engagement element and the at least one second engagement element. By way of example only, the at least one first engagement element has a recess and the at least one second engagement element has a projection, e.g., a locking lug. However, other types of mechanical connections between the flow bushing and the feed pipe are also possible.

[0050] According to another embodiment, the feed pipe and / or the flow bushing is / are made of plastic.

[0051] Especially with feed pipes manufactured using plastic injection molding, the flow sleeve offers advantages in terms of the feed pipe's production. This is because the feed pipe can be manufactured with its inner edge, which facilitates demolding, and at the same time, flow losses at the edge can be prevented because the flow sleeve provides a deflection radius.

[0052] If both the feed pipe and the flow sleeve are made of plastic, this has the advantage that both components have a similar temperature-dependent expansion behavior.

[0053] According to another embodiment, the deflection radius of the flow bushing has a radius of curvature with a value in the range of 2.0 mm or more, 3.0 mm or more, 3.5 mm or more, 4.0 mm or more, 4.5 mm or more and / or 5.0 mm or more.

[0054] The larger the radius of curvature, the smaller the flow losses in the area of ​​the pipe deflection from the first direction to the second direction.

[0055] According to a further embodiment, the feed pipe has a feed opening for supplying water to the feed pipe, a first discharge opening for discharging water from the feed pipe towards the washing chamber, and a second discharge opening for discharging water from the feed pipe towards the washing chamber.

[0056] Furthermore, the flow sleeve is located at the first discharge opening. The second discharge opening, viewed in cross-section parallel to one of the water flow directions in the feed pipe, is positioned opposite the edge, and the flow sleeve covers this second discharge opening. In dishwashers where a second discharge opening is provided in the deflection area but is not used (blind discharge opening), the flow sleeve can advantageously be designed to also close the blind discharge opening, in addition to providing the deflection radius for redirecting the water from the first direction to the second.

[0057] Alternatively, the flow sleeve can also be designed in such a way that it does not provide a deflection radius for redirecting the water from the first direction to the second direction and is solely designed to cover the blind discharge opening.

[0058] The flow sleeve covers the second discharge opening, ensuring a particularly fluid-tight seal.

[0059] The second discharge opening is located particularly in the area of ​​the deflection.

[0060] According to another embodiment, the flow sleeve has a flow divider which is designed to direct the water flowing through the feed pipe into two separate, parallel pipe sections of the flow sleeve.

[0061] By dividing the volume flow using the flow divider, the asymmetrical flow occurring in the area of ​​deflection from the first direction to the second direction can be influenced, thus increasing the symmetry of the flow.

[0062] If a second discharge opening as described above is provided, which is not a blind discharge opening (i.e., through which water is actually discharged towards the rinsing chamber), then the flow divider can also be designed to influence, e.g., to determine, the ratio of the amounts of water discharged to the first discharge opening and to the second discharge opening.

[0063] Other possible implementations of the invention also include combinations not explicitly mentioned above or below regarding the

[0064] Exemplary embodiments describe features or embodiments. In doing so, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0065] 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.

[0066] Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher;

[0067] Fig. 2 shows a supply of water to a spray device of the household dishwasher via several interconnected supply pipes according to one embodiment;

[0068] Fig. 3 shows a section of a feed pipe from Fig. 2, which is fluidly connected to the spray device according to one embodiment, wherein a flow bushing is inserted into the feed pipe;

[0069] Fig. 4 shows a flow sleeve from Fig. 3 in cross-section along line IV-IV;

[0070] Fig. 5 illustrates a mechanical connection of the flow sleeve with the feed pipe from Fig. 3 according to one embodiment;

[0071] Fig. 6 shows another embodiment of the feed pipe with the flow sleeve; and

[0072] Fig. 7 shows another embodiment of the feed pipe with the flow sleeve.

[0073] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0074] Fig. 1 shows a schematic perspective view of an embodiment of a

[0075] Household dishwasher 1. The household dishwasher 1 comprises a wash chamber 2, which can be closed by a door 3, in particular a watertight one. For this purpose, a sealing device may be provided between the door 3 and the wash chamber 2. The wash chamber 2 is preferably cuboid in shape. The wash chamber 2 may be arranged in a housing of the household dishwasher 1. The wash chamber 2 and the door 3 may form a wash chamber 4 for washing items.

[0076] The door 3 is shown in its open position in Fig. 1. The door 3 can be opened or closed by pivoting it about a pivot axis 5 located at one of its lower ends. The door 3 can be used to open or close a loading opening 6 of the wash tank 2. The wash tank 2 has a base 7, a top 8 opposite the base 7, a rear wall 9 opposite the closed door 3, and two opposing side walls 10 and 11. The base 7, the top 8, the rear wall 9, and the side walls 10 and 11 can, for example, be made of stainless steel. Alternatively, the base 7 can, for example, be made of a plastic material.

[0077] The household dishwasher 1 further comprises at least one dishware holder 12 to 14. Preferably, several, for example three, dishware holders 12 to 14 can be provided, wherein dishware holder 12 can be a lower dishware holder or a lower basket, dishware holder 13 an upper dishware holder or an upper basket, and dishware holder 14 a cutlery drawer. As further shown in Fig. 1, the dishware holders 12 to 14 are arranged one above the other in the wash tub 2. Each dishware holder 12 to 14 can be selectively moved into or out of the wash tub 2. In particular, each dishware holder 12 to 14 can be pushed or moved into the wash tub 2 in an insertion direction E and pulled or moved out of the wash tub 2 in an extension direction A opposite to the insertion direction E.

[0078] Fig. 2 shows a supply device 15 for supplying water 16 to a spray device 17 or a spray arm 27 of the household dishwasher 1 from Fig. 1. The supply device 15 has several fluid-connected supply tubes 18, 19, 20. For example, the supply device 15 has a first supply tube 18, which is arranged vertically (in the z-direction in Fig. 2) and extends from the base 7 (Fig. 1) of the household dishwasher 1 along its rear wall 9 (Fig. 1). Furthermore, the supply device 15 has, for example, a second supply tube 19, which is fluidly connected to the first supply tube 18 (e.g., directly). The second feed tube 19 has a deflection 21 from the vertical direction (positive z-direction) to the horizontal direction (positive y-direction), i.e., by an angle of 90°. The second feed tube 19 has, for example, a docking point 22 for docking (e.g., detachable mechanical connection) a third feed tube 20.The third feed pipe 20 of the feed device 15 is fluidly connected to the second feed pipe 19 at the docking point 22 (e.g., detachably). For example, the third feed pipe 20 is attached to the dishware holder 13, e.g., the upper basket 13. Furthermore, the third feed pipe 20 is fluidly connected to the second feed pipe 19 at the docking point 22 when the dishware holder 13, e.g., the upper basket 13, is in a retracted position. Additionally, the third feed pipe 20 is detached and spaced apart from the docking point 22 and the second feed pipe 19 when the dishware holder 13, e.g., the upper basket 13, is in an extended position. The third feed tube 20 extends predominantly horizontally towards the door 3 (Fig. 1) when the door 3 is closed (i.e., along the positive y-direction) and has a deflection 23 from the horizontal direction R1 (i.e., positive y-direction) to the vertical direction R2 (i.e.,negative z-direction, towards bottom 7 in Fig. 1). The deflection 23 is also, for example, a deflection by an angle of 90°. The reference symbol S indicates a flow direction of the water in the first, second and third feed pipes 18, 19, 20.

[0079] Figure 3 shows a detail of section III in Figure 2. Figure 3 shows a section of the second feed pipe 20 (also called the inlet pipe) and a section of the spray device 17. The spray device 17 has a connecting section 24 that is connected (mechanically and fluidly) to an end section 25 of the second feed pipe 20. For example, a clamping device 26 is provided by means of which the connecting section 24 and the end section 25 are connected to each other. The spray device 17 also has, for example, one or more spray arms 27. In the example shown in Figure 3, the deflection 23 of the second feed pipe 20 is located at an end 28 of the second feed pipe 20 adjacent to the spray device 17.

[0080] The second feed tube 20, for example, is made of plastic, for example by injection molding.

[0081] The second feed pipe 20 has an edge 29 on its inner wall 30 in the area of ​​the deflection 23. The edge 29 is produced, for example, by injection molding. The edge 29 has, for example, an angle α of 90°. The inner wall 30 has, for example, a first inner wall section 31, which is arranged along the first direction R1 (positive y-direction). Furthermore, the inner wall 30 has, for example, a second inner wall section 32, which is arranged along the second direction R2 (negative z-direction). The edge 29 is formed at the intersection of the two inner wall sections 31 and 32.

[0082] To avoid large flow losses at the sharp edge 29 of the second feed pipe 20, the household dishwasher 1, in particular the feed device 15, has a flow sleeve 33 inserted into the second feed pipe 20. The flow sleeve 33 has, for example, a closed circumference U (Fig. 4).

[0083] The flow bushing 33, for example, is also made of plastic.

[0084] The flow sleeve 33 has an outer wall 34 whose shape is adapted to the edge 29. Furthermore, the flow sleeve 33 has an inner wall 35 with a curved section 36, which provides a deflection radius K inside I of the second feed tube 20. The deflection radius K of the flow sleeve 33 has, for example, a radius of curvature with a value in the range of 2.0 mm or more, 3.0 mm or more, 3.5 mm or more, 4.0 mm or more, 4.5 mm or more, and / or 5.0 mm or more.

[0085] In the example of Fig. 3, the flow sleeve 33 forms in particular an outlet 37 of the second supply pipe 20. Through the outlet 37 (i.e. the outlet opening 37) the water 16 (Fig. 2) guided through the second supply pipe 20 is discharged to the spray device 17.

[0086] The flow sleeve 33 is, for example, arranged only in the area of ​​the second inner wall section 32 of the inner wall 30 of the second feed pipe 20. The first inner wall section 31 of the inner wall 30 of the second feed pipe 20, however, is, for example, free of the flow sleeve 33. The curved section 36 of the flow sleeve 33 forms, for example, an extension of the first inner wall section 31. The curved section 36 of the flow sleeve 33 continues, for example, the first inner wall section 31 seamlessly and / or continuously. In particular, a common inner wall 38 formed by an exposed section 31 of the inner wall 30 of the second feed pipe 20 and an inner wall 35 of the flow sleeve 33 is smooth and without gaps, steps, edges, or the like.

[0087] The second feed tube 20 has, for example, a recess 39 into which the flow sleeve 33 is inserted. In particular, the flow sleeve 33 has the closed circumference U (Fig. 4), which comprises a first circumferential section 40 and a second circumferential section 41. The first circumferential section 40 (Fig. 4) of the flow sleeve 33 is inserted into the recess 39 (Fig. 3) of the second feed tube 20. Furthermore, the second circumferential section 41 (Fig. 4) of the flow sleeve 33 has the curved section 36 (Fig. 4). The second circumferential section 41 of the flow sleeve 33 is also arranged at the edge 29 of the second feed tube 20 and at the second inner wall section 32 of the second feed tube 20. A wall thickness D of the flow sleeve 33 in the first circumferential section 40 is in particular equal to a depth T of the recess 39 in a radial direction R3 of the second feed tube 20.

[0088] The flow sleeve 33 is attached to the second feed tube 20, in particular in a captive manner. A snap-fit ​​connection 42 is shown in Fig. 5 by way of example only. As shown in Fig. 5, the second feed tube 20 has at least one first engagement element 43, e.g., a recess 44, in the area of ​​the recess 39. The flow sleeve 33 also has at least one second engagement element 45, e.g., a locking lug 46. The at least one first and at least one second engagement element 43, 45 are engaged with each other. For example, the at least one locking lug 46 is engaged in the at least one recess 44. For example, several first and second engagement elements 43, 45 are provided, which are evenly distributed around the circumference U (Fig. 4).

[0089] Although not shown in the figures, the flow sleeve 33 can also be inserted into the second feed pipe 21 (Fig. 2) in the area of ​​the deflection 21, e.g. adjacent to the docking point 22.

[0090] Figure 6 shows another embodiment of a feed tube 20' with a flow sleeve 33'. Only the differences from the embodiment in Figure 3 are described below.

[0091] The second feed pipe 20' (as well as the second feed pipe 20) has a feed opening 47 (Fig. 2) for supplying water 16 to the feed pipe 20, 20'. The second feed pipe 20' (as well as the second feed pipe 20) also has a first discharge opening 48 for discharging water 16 from the feed pipe 20, 20' to the spray device 17. The second feed pipe 20' in Fig. 6 – in contrast to the second feed pipe 20 in Fig. 3 – has a second discharge opening 49 for discharging water 16 from the feed pipe 20' to the spray device 17'. Furthermore, the flow sleeve 33' is arranged at the first discharge opening 48. Furthermore, the second discharge opening 49, viewed in cross-section parallel to the flow direction S of the water 16 in the feed pipe 20', is arranged opposite the edge 29'. In addition, the flow sleeve 33' covers the second discharge opening 49. Thus, a second discharge opening 49 that is not in use can be covered by the flow sleeve 33'.

[0092] Figure 7 shows another embodiment of a feed pipe 20" with a flow sleeve 33". Only the differences from the embodiment in Figure 3 are described below.

[0093] The flow sleeve 33" has a flow divider 50. The flow divider 50 is designed to direct the water 16 flowing through the feed pipe 20" into two separate, parallel pipe sections 51, 52 of the flow sleeve 33". This allows for a higher degree of flow symmetry in the feed pipe 20". Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

[0094] Reference symbols used:

[0095] 1 household dishwasher

[0096] 2 washing containers

[0097] 3 Door

[0098] 4. Dishwashing area

[0099] 5 swivel axes

[0100] 6 Feed opening

[0101] 7 Floor

[0102] 8 ceiling

[0103] 9 Back panel

[0104] 10 side wall

[0105] 11 Side wall

[0106] 12-14 dish capacity

[0107] 15 Feed device

[0108] 16 Water

[0109] 17, 17' Spray device

[0110] 18 Feed pipe

[0111] 19 Feed pipe

[0112] 20 Feed pipe

[0113] 20', 20" feed pipe

[0114] 21. Deflection

[0115] 22 Docking point

[0116] 23 Deflection

[0117] 24 Connecting section

[0118] 25 Final section

[0119] 26 Clamping device

[0120] 27 Spray arm

[0121] 28 End

[0122] 29, 29' edge

[0123] 30 Interior wall

[0124] Section 31

[0125] Section 32

[0126] 33 Flow bushing 33', 33" flow bushing

[0127] 34 Exterior wall

[0128] 35 Interior wall

[0129] Section 36

[0130] 37 Outlet

[0131] 38 Interior wall

[0132] 39 Exclusion

[0133] 40 Scope section

[0134] 41 Scope section

[0135] 42 rest connection

[0136] 43 Intervention element

[0137] 44 Exclusion

[0138] 45 Intervention element

[0139] 46 Rastnase

[0140] 47 Feed opening

[0141] 48 Discharge opening

[0142] 49 Discharge opening

[0143] 50 flow dividers

[0144] 51 Pipe section

[0145] 52 Pipe section

[0146] A Extraction direction a Angle

[0147] D wall thickness

[0148] E Insertion direction

[0149] I Interior

[0150] K Deflection radius

[0151] R1, RT direction

[0152] R2, R2' direction

[0153] R3 direction

[0154] S direction T depth U circumference

Claims

PATENT CLAIMS 1. Household dishwasher (1) with a feed pipe (20) for supplying water (16) towards a washing chamber (4) and a flow sleeve (33) inserted into the feed pipe (20), wherein the feed pipe (20) has a deflection (23) from a first direction (R1) to a second direction (R2) and in a region of the deflection (23) an edge (29) on its inner wall (30), and wherein the flow sleeve (33) has an outer wall (34) whose shape is adapted to the edge (29), and an inner wall (35) with a curved section (36) which provides a deflection radius (K) inside (I) of the feed pipe (20).

2. Household dishwasher according to claim 1, comprising a spray device (17), wherein the feed pipe (20) is fluidly connected to the spray device (17) and is configured to supply water (16) to the spray device (17), and the deflection (23) is arranged at an end (28) of the feed pipe (20) adjacent to the spray device (17).

3. Household dishwasher according to claim 1 or 2, wherein the flow sleeve (33) forms an outlet (37) of the feed pipe (20) for releasing water (16) towards the washing chamber (4).

4. Household dishwasher according to one of claims 1 - 3, wherein the first direction (R1) is a substantially horizontal direction of the household dishwasher (1), and the second direction (R2) is a substantially vertical direction of the household dishwasher (1).

5. Household dishwasher according to claim 1, wherein the feed pipe (19) has a docking point (22) for fluid connection to a further feed pipe (20) of the household dishwasher (1), the further feed pipe (20) is configured to supply water (16) to a spray device (17) of the household dishwasher (1), and the feed pipe (19) is positioned upstream of the further feed pipe (20) with respect to a flow direction (S) of the water (16).

6. Household dishwasher according to claim 1 or 5, wherein the first direction (R1 ') is a substantially vertical direction of the household dishwasher (1) and the second direction (R2') is a substantially horizontal direction of the household dishwasher (1).

7. Household dishwasher according to one of claims 1 - 6, wherein a common inner wall (38) formed by an exposed section (31) of the inner wall (30) of the feed pipe (20) and an inner wall (35) of the flow sleeve (33) is smooth.

8. Household dishwasher according to one of claims 1 - 7, wherein the feed pipe (20) has a recess (39) into which the flow sleeve (33) is inserted.

9. Household dishwasher according to one of claims 1 - 8, wherein the flow sleeve (33) has a closed circumference (U) with a first circumferential section (40) and a second circumferential section (41), the feed tube (20) has a recess (39) into which the first circumferential section (40) of the flow sleeve (33) is inserted, and the second circumferential section (41) of the flow sleeve (33) has the curved section (36) and is arranged at the edge (29) of the feed tube (20).

10. Household dishwasher according to claim 9, wherein a wall thickness (D) of the flow sleeve (33) in the first circumferential section (40) is substantially equal to a depth (T) of the recess (39) in a radial direction (R3) of the feed tube (20).

11. Household dishwasher according to one of claims 1 - 10, wherein the feed pipe (20) has at least one first engagement element (43), and the flow sleeve (33) has at least one second engagement element (45) which engages with the at least one first engagement element (43).

12. Household dishwasher according to one of claims 1 - 11, wherein the feed pipe (20) and / or the flow sleeve (33) is / are made of plastic.

13. Household dishwasher according to one of claims 1 - 12, wherein the deflection radius (K) of the flow sleeve (33) has a radius of curvature with a value in the range of 2.0 mm or more, 3.0 mm or more, 3.5 mm or more, 4.0 mm or more, 4.5 mm or more and / or 5.0 mm or more.

14. Household dishwasher according to one of claims 1-13, wherein the feed pipe (20') comprises: a feed opening (47) for supplying water (16) to the feed pipe (20'), a first discharge opening (48) for discharging water (16) from the feed pipe (20') towards the washing chamber (4), and a second discharge opening (49) for discharging water (16) from the feed pipe (20') towards the washing chamber (4), wherein the flow sleeve (33') is arranged at the first discharge opening (48), the second discharge opening (49), viewed in cross-section parallel to a flow direction (S) of the water (16) in the feed pipe (20'), is arranged opposite the edge (29), and the flow sleeve (33') covers the second discharge opening (49).

15. Household dishwasher according to one of claims 1 - 14, wherein the flow sleeve (33") has a flow divider (50) which is configured to direct the water (16) flowing through the feed pipe (20") into two separate parallel pipe sections (51, 52) of the flow sleeve (33").

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