HOUSEHOLD APPLIANCE WITH ONE DOOR UNIT

Description

[0001] The invention relates to a household appliance according to claim 1, and a method therefor according to claim 8.

[0002] Document DE 10 2012 103 684 A1 discloses a household appliance with a housing that includes a projector. The projector is arranged in the housing and projects a projection image onto an outer surface of the housing. In particular, two optical systems are assigned to the projector, which redirect a light beam emanating from the projector such that the light beam is guided into the interior of a door element of the household appliance. A projection image is projected onto an inner surface of a viewing window of the door element.

[0003] US 2012 / 0327201 A1 discloses another top-loading washing machine. The washing machine comprises a lid element, which has a display unit. A UV projection unit is arranged in a spoiler-like element formed in a rear region of the lid element of the washing machine, above the lid element, and projects an image onto the lid element.

[0004] EP 2 094 896 A1 (published as WO2008 / 052988A1) describes printing a porthole window of a laundry care appliance using an inkjet printer.

[0005] DE 10 2013 100 456 A1 describes a method for producing printed plastic components, in particular for producing panel assemblies. CN 208 562 869 U discloses a household appliance according to the preamble of claim 1.

[0006] To ensure a clear projection image, it is advantageous to apply a self-adhesive film to the area where the projection image is to be displayed. Such a film, especially a self-adhesive projection film, is very expensive and requires considerable effort to produce.

[0007] It is therefore an object of the invention to provide a household appliance with a clear and modern projection surface, wherein improved properties with regard to flexibility and cost reduction are to be provided.

[0008] The object of the invention is solved by the features of independent claims 1 and 8. Further advantageous embodiments of the invention are specified in the subclaims as well as in the description and the drawings.

[0009] According to one aspect of the invention, the object of the invention is achieved by a household appliance. The household appliance comprises a housing with a receptacle and an opening, and a door unit, wherein the door unit is provided for closing the opening. Furthermore, the household appliance has a viewing window arranged in the door unit, wherein the viewing window is substantially transparent, so that the receptacle can be viewed when the opening is closed.The household appliance further comprises a window element, wherein the window element and the viewing window are arranged substantially opposite one another and wherein, when the door unit is closed, the window element protrudes into the housing, in particular into the receptacle of the household appliance. A projection surface is provided in the region of the viewing window. The projection surface can be produced with inkjet printing, so that the projection surface remains substantially transparent. In other words, the viewing window continues to have transparent properties.

[0010] With inkjet printing, a type of film is applied to the viewing window, which serves as a projection surface. The printing intensity of the viewing window is selected such that the viewing window or the printed projection surface remains essentially transparent, allowing a user to see into the container when the opening of the fluid-carrying household appliance is closed. Furthermore, printing using an inkjet printer is cost-effective and can be easily integrated into a production run in a factory.

[0011] The household appliance can be a fluid-conducting household appliance, such as a washing machine, a washer-dryer, a tumble dryer, a dishwasher, a fully automatic coffee machine, and / or a steamer. Furthermore, the household appliance 1 can be an oven, a stove, a microwave, a warming drawer, or an extractor hood.

[0012] Advantageously, the projection surface of the viewing window comprises at least one film and / or at least one foil and / or is formed from glass and / or at least one polymer, wherein the viewing window is formed from glass and / or at least one polymer.

[0013] The projection surface of the viewing window can be made of the same material as the viewing window. However, it is also conceivable that the projection surface of the viewing window is made of a different material than the viewing window. The projection surface can be integrated into the viewing window so that the projection surface is, for example, at least partially surrounded by the viewing window. However, it is also conceivable that the projection surface represents a separate element that can be fastened on or to the viewing window. It is also conceivable that the viewing window is suitable for use as a projection surface. As already mentioned above, the projection surface can also be at least one film that is applied to the viewing window.

[0014] Preferably, an intensity of a color application on the projection surface with the inkjet printing corresponds essentially to less than 50% of the maximum possible intensity of a color application of the inkjet printing.

[0015] Every printing device has different properties, or rather, different printing characteristics. This means that the maximum intensity at which a printing device can print can vary from device to device. However, experts are aware that the more ink is applied, i.e., the higher the printing intensity, the lower the transparency of the printed surface. However, the projection quality is better the higher the ink application intensity. For each printing device, it is therefore necessary to look at which intensity must be set that is lower than the maximum intensity so that the transparent properties of a projection surface, and thus of the viewing window, are maintained when the projection surface is printed.

[0016] The inkjet printing preferably includes at least one light color that can be applied to the projection surface. With a light color, the printed projection surface can also remain transparent, allowing a user to see into the receptacle when the appliance's opening is closed.

[0017] The light color preferably comprises various colors, with the light color essentially comprising, in particular, one shade of white and / or multiple shades of white. Depending on the requirements, or to achieve greater transparency or better projection, one shade of white can be used and / or multiple shades of white can be combined.

[0018] By applying a light color to the projection surface, the transparent properties of the projection surface and thus of the viewing window can be preserved. Printers can generally reproduce or print in different intensities or contrasts. This means that the intensity of at least one light color can be adjusted so that the projection surface receives a "very light" application of color, also called ink film or film, so that ultimately the transparent properties of the projection surface and the viewing window remain unaffected by the printed projection surface.

[0019] Advantageously, inkjet printing is done directly on the viewing window. This eliminates the need to glue or attach a projection surface to the viewing window, resulting in a simpler and more cost-effective manufacturing process.

[0020] As an alternative to direct inkjet printing of the viewing window, inkjet printing can be applied indirectly to the viewing window. This means that the inkjet printing is applied to an additional component or element suitable as a projection surface, which can then be attached to or onto the viewing window. The additional component or element suitable as a projection surface can, in particular, consist of at least one film and / or a flat glass pane and / or a flat plate-like object made of at least one polymer and / or a flat pane made of at least one polymer and / or another flat element.

[0021] According to a second aspect of the invention, the object of the invention is achieved by a method for generating a projection surface on a viewing window of a household appliance. To carry out the method, a housing having an opening and a door unit are provided, wherein the door unit is configured to close the opening. Furthermore, a viewing window is provided, which is arranged in the door unit, wherein the viewing window is substantially transparent, thus ensuring a view into the interior of the housing.Furthermore, a window element is provided, wherein the window element and the viewing window are arranged substantially opposite one another and wherein the window element projects into the housing, in particular into the receiving container of the household appliance, in a closed state of the door unit and a projection surface is provided, wherein the projection surface is provided in the region of the viewing window and wherein the projection surface is produced with an inkjet print.

[0022] Preferably, the viewing window is printed directly with the inkjet print. This allows for the viewing window to be installed directly into the door unit after printing. It is also conceivable that the printing process can be combined with the production of the viewing window.

[0023] Alternatively, the projection surface is created on or at an element, wherein the element is printed with the inkjet print and wherein the element is formed from at least one film and / or glass and / or at least one polymer. The viewing window is thus indirectly processed with the inkjet print.

[0024] Depending on the manufacturing method of the viewing window, direct printing of the viewing window or printing of an element may be advantageous.

[0025] Advantageously, the printed element is attached to the viewing window.

[0026] This has the advantage that the projection surface can be manufactured in an external work step and if the projection surface is damaged while it is already assembled, the projection surface can be easily replaced.

[0027] The projection surface is preferably created with at least one light color.

[0028] The light colour advantageously comprises essentially one shade of white and / or several shades of white.

[0029] According to a third aspect of the invention, the object of the invention is achieved by a door unit of a household appliance with a viewing window, wherein the viewing window is substantially transparent and wherein the viewing window comprises a projection surface according to one of the above-mentioned aspects.

[0030] Further features and advantages of the present invention will become apparent from the following description with reference to the drawings. Fig. 1 shows a front view of a fluid-conducting household appliance; Fig. 2 shows a front view of a household appliance; Fig. 3 shows an exploded view of a door unit of a fluid-conducting household appliance; Fig. 4 shows a sectional view of an embodiment of a door unit of a fluid-conducting household appliance; Fig. 5 shows a printed viewing window of a door unit of a fluid-conducting household appliance; Fig. 6 shows a fluid-conducting household appliance, with an internal device and / or an external device.

[0031] In Fig. 1 and in Fig. 2 a front view of a household appliance 1 is shown. In particular, Fig. 1 and Fig. 2 so-called large household appliances.

[0032] The Fig. 1 The household appliance shown can, for example, be a fluid-conducting household appliance 1a, such as a washing machine, a washer-dryer or a tumble dryer or a dishwasher, a fully automatic coffee machine and / or a steamer and / or similar fluid-conducting household appliance.

[0033] The Fig. 2 The household appliance 1 shown can be an oven or a stove or a microwave or a warming drawer or an extractor hood, in particular so-called table fans, which can be sunk into a worktop, for example.

[0034] The terms mentioned or used below refer to both the fluid-carrying household appliance 1a and the household appliance 1, which is Fig. 2 is shown.

[0035] In particular, Fig. 1 a fluid-conducting household appliance 1a is shown. The fluid-conducting household appliance 1a shown as an example is a washing machine 3. As already mentioned above, the fluid-conducting household appliance 1a can alternatively be a washer-dryer or a tumble dryer. Furthermore, the fluid-conducting household appliance 1a can be a dishwasher, a fully automatic coffee machine, and / or a steamer. The exemplary embodiments are described below essentially with reference to the washing machine 3.

[0036] The washing machine 3 comprises a housing 5. A receptacle 6 is arranged in the housing 5, which, in the present exemplary embodiment, essentially holds utensils to be cleaned, for example laundry. The housing 5 has a front side 7 and side walls 9. An opening 11 is formed in the front side 7 of the housing 5. The opening 11 can be closed with a door unit 13. The door unit 13 is essentially rotatably attached to the housing 5. Furthermore, a dispenser tray 15 is indicated in an upper region of the front side 7 of the washing machine 3. Next to the dispenser tray 15, a switch 17 is arranged in an upper region of the front side 7 of the fluid-conducting household appliance 1a. The switch 17 can also be designed as a type of push button or the like. The switch 17 essentially serves to switch the fluid-conducting household appliance 1a on or off.

[0037] In Fig. 2 a household appliance 1 is shown. As already mentioned above, the household appliance 1 can be an oven or a stove or a microwave or a warming drawer or an extractor hood, in particular so-called table extractors, which can be sunk into a worktop, for example. The household appliance 1 comprises a housing 5. A receptacle 6 is arranged in the housing 5, wherein the receptacle 6 can hold, for example, food or groceries and / or culinary items. In an extractor hood, vapors are predominantly absorbed or these so-called vapors are drawn in. Vapors are vapors that primarily arise during baking and cooking.

[0038] The housing 5 further comprises a front side 7 and / or outer side 7a as well as side walls 9 or wall elements 9a. An opening 11 is formed in the front side 7 of the housing 5. The opening 11 can be closed with a door unit 13. The door unit 13 is essentially rotatably mounted on the housing 5. However, it is also conceivable for the door unit 13 to be tiltably and / or slidably mounted on the housing 5.

[0039] In Fig. 3 An exploded view of a door unit 13 is shown. The door unit 13 is particularly suitable for a fluid-conducting household appliance 1a. The door unit 13 has a viewing window 19, wherein the viewing window 19 can also be referred to as a viewing pane. The viewing window 19 is essentially transparent. A projection surface 20 is provided in the area of ​​the viewing window 19. The projection surface 20 can extend at least over a partial area 21 of the viewing window 19. However, it is also conceivable for the projection surface 20 to extend essentially over the entire viewing window 19 or at least over a large part of the viewing window 19. The projection surface 20 serves to display projection images 23. In Fig. 1 A projection image 23 is shown as an example. The projection image 23 shows in Fig. 1 For example, a wash program called "Easy Care" is shown, with a wash degree, a remaining running time, and a rotation speed of the collection container 6 displayed. However, it is also conceivable that additional information could be displayed. This information could be shown alongside the information already mentioned or on a further display level, which opens, for example, when an operating program has been selected. The projection surface 20 will be discussed in more detail below.

[0040] The door unit 13 further comprises a first frame element 27, a second frame element 29, a window ring 31, and a window element 33. The window element 33 is arranged substantially between the first frame element 27 and the second frame element 29. The window element 33 is substantially received in the second frame element 29. The viewing window 19 is arranged on the first frame element 27. The window element 33 and the viewing window 19 are arranged substantially opposite one another, wherein the window element 33 protrudes into the housing 5, in particular into the receptacle 6 of the fluid-conducting household appliance 1a, when the door unit 13 is closed. The viewing window 19 is arranged substantially outside the housing 5 of the fluid-conducting household appliance 1a when the door unit 13 is closed. A cavity 35 is formed between the viewing window 19 and the window element 33.

[0041] In the cavity 35 there is essentially an optical unit 37 for guiding a light beam 38 (for example in Fig. 4 shown) onto the projection surface 20 or onto the partial area 21 of the viewing window 19. The light beam 38 is generated by a projection unit 39. The projection unit 39 will be discussed in more detail below. The optical unit 37 essentially comprises a holding element 41 and a mirror-like element 43. The optical unit 37 is arranged in the cavity 35 such that, when the door unit 13 is closed, an operator can preferably look into the receptacle 6 of the fluid-conducting household appliance 1a.

[0042] The projection unit 39 is preferably arranged between the first frame element 27 and the second frame element 29. The projection unit 39 is preferably arranged in a lower region of the first frame element 27. The projection unit 39 can be attached to the first frame element 27 with a holding device 40. The projection unit 39 can be arranged on the first frame element 27 such that the projection unit 39 is arranged in the cavity 35 or at least protrudes into the cavity 35. However, the projection unit 39 can also be arranged outside the cavity 35. The optical unit 37 is arranged substantially opposite the projection unit 39 so that, as already mentioned above, light beams 38 generated and output by the projection unit 39 are guided onto the projection surface 20 via the optical unit 37.

[0043] Essentially, the projection unit 39 comprises a projector 45 and a computer unit 47. The computer unit 47 is provided for controlling the projector 45. The computer unit 47 is provided for calculating the projection image 23 to be projected by the projector 45. Furthermore, the projection unit 39 comprises a control unit 49. The control unit 49 is provided for controlling the projector 45. The control unit 49 can, in particular, be an LCoS control unit.The control unit 49 is provided to display a projection image 23 calculated by the computer unit 47 in such a way that the projector 45 can output the projection image 23 by controlling the control unit 49, or the control unit 49 is provided to output a projection image 23 calculated by the computer unit 47 in such a way that the projector 45 can display the projection image 23 by irradiating the optical unit 37 or the projection surface 20. To prevent overheating of the projection unit 39, a cooling unit 51 is formed in the projection unit 39. The cooling unit 51 is provided to cool at least one further component of the projection unit 39, such as the projector 45, the computer unit 47 and / or the control unit 49.

[0044] The window ring 31 essentially serves to hold the door unit 13 together, with the window ring 31 being designed primarily to define the design. For example, a handle element 32 can be formed on the window ring 31 if the handle element 32 is required or desired. Additionally, the window ring 31 serves to secure the first frame element 27 and / or the second frame element 29 and is essentially designed such that the first frame element 27 and / or the second frame element 29 are encompassed by the window ring 31.

[0045] In Fig. 4 A sectional view of a possible embodiment of a door unit 13 of the fluid-conducting household appliance 1a is shown. The optical unit 37, in particular the holding element 41 of the optical unit 37, is mounted here, for example, in an upper region of the window element 33. This allows an operator to continue to see through the viewing window 19 and the window element 33.

[0046] By way of example, it should be mentioned that an interaction surface 57 is conceivable in the area of ​​the projection surface 20, so that a user can make settings on the fluid-conducting household appliance 1a by means of the interaction surface.

[0047] The optical unit 37 is in Fig. 4 For example, it is arranged in an upper region of the window element 33 and aligned such that light rays 38 emitted by the projection unit 39 are projected onto the projection surface 20 or onto the interaction surface 57. For example, the projection surface 20 or the interaction surface 57 is arranged in an upper region of the viewing window 19. However, it is also conceivable that the projection surface 20 or the interaction surface 57 is formed essentially on the entire viewing window 19. The optical unit 37 can be arranged or attached to the window element 33 by means of various fastening and / or bonding methods or bonding techniques.

[0048] The projection surface 20 is produced using a printing process known as the inkjet printing process. In the inkjet printing process, individual ink drops are sprayed or applied onto a surface to be printed. By arranging a large number of ink drops in a row, a printed surface is formed, which can, for example, represent a printed image or, as in this case, form a projection surface 20. Inkjet printing is generally contactless, so scratching of the material to be printed is virtually impossible.

[0049] The projection surface 20 of the viewing window 19 is formed from at least one film and / or at least one foil and / or glass and / or at least one polymer. The viewing window 19 is preferably formed from glass and / or at least one polymer. The projection surface 20 can be made of the same material as the viewing window 19. However, it is also conceivable that the projection surface 20 is already integrated into the viewing window 19. It is also conceivable that the projection surface 20 is a projection foil. In this case, the projection foil is processed using the inkjet printing process. However, it is important that the viewing window 19 remains transparent after the projection foil has been applied.

[0050] The viewing window 19 can be obtained as a sheet material and subsequently processed using the inkjet printing process. However, it is also conceivable for the viewing window 19 to be manufactured using the injection molding process. With the injection molding process, the surface of the molded component can have a rough surface. In this case, it is advisable to use a projection film, as already described above, to create a projection surface 20. However, a projection film is understood here to mean a film that has been at least partially processed using the inkjet printing process.

[0051] Advantageously, at least one light color is used for the inkjet printing process. This at least one light color can be composed of several different shades of white. However, it is also conceivable that only one shade of white is used. A UV-curing ink and / or a UV-curing varnish is particularly suitable for this purpose. A UV-curing ink and / or a UV-curing varnish essentially have the special property, among other things, of adhering well to PMMA materials, glass, and other materials.

[0052] In Fig. 5 By way of example, a section of a viewing window 19 of a door unit 13 of a fluid-conducting household appliance 1a, which is printed (at least partially) using the inkjet printing process, is shown.

[0053] The viewing window 19 is exposed to an ink application created using the inkjet printing process. In other words, an ink film 53 is applied to the viewing window 19. The ink film 53 can be applied with a specific intensity, which means that the ink film 53 can be wafer-thin, barely perceptible, but also very strong. Of course, the ink film 53 can also be applied with an intensity between wafer-thin and strong. Preferably, the ink film 53 is applied with an intensity that is essentially less than 50% of the maximum possible intensity of an ink film 53 or an ink application. Since the intensity of the ink film 53 or the ink application varies from printing device to printing device, the following merely gives an example of the intensity range with which, for example, an ink application can be carried out or an ink film is applied.

[0054] In the following example or in the printed element 53a, which is a section of a viewing window 19, in Fig. 5 A Mimaki flatbed printer is used. In this embodiment, the projection surface 20 is printed directly onto the viewing window 19. The print intensity is selected such that after printing on the element 53a or the viewing window 19, the transparent property of the printed element 53a—here, the viewing window 19 itself—is retained. However, those skilled in the art will be aware that higher color intensity yields better projection quality on the projection surface. The color intensity of the printing device can be adjusted depending on which criteria appear more important.

[0055] In the present example, the color intensity is selected or the color film 53 is applied in such a way that a clearly visible projection image 23 is displayed on the viewing window 19 or on the viewing panel 19, but also allows a view into the receiving container 6 of the fluid-carrying household appliance 1a. For example, the color intensity in the present embodiment is Fig. 5 between 0.5% and 10% of a maximum color intensity is selected, preferably between 1% and 8%, preferably between 1.5% and 6%, particularly preferably between 2.5% and 4.5%. Thus, a color film 53 is applied to the viewing window 19 that is perceptible to the human eye but does not restrict visibility.

[0056] The following briefly outlines the individual steps for creating a viewing window 19 with a projection surface 20. First, the process in which the projection surface 20 is applied directly to the viewing window 19 is described. Subsequently, the process in which the viewing window 19 is indirectly equipped with a projection surface 20 is described.

[0057] It is particularly cost-effective to select sheet material and / or disc-like elements for the production of the viewing window 19 and / or the projection surface 20. Alternatively, the viewing window 19 can also be manufactured, injection-molded, or produced using a suitable injection-molding process. Sheet material and / or disc-like elements are well suited to being cut to size, inserted into a printer, and printed. Furthermore, sheet material can be easily adapted to the desired shape, allowing, for example, a slight bend to be introduced into the sheet material. Other treatment options for the sheet material are conceivable.

[0058] The material can be supplied as a sheet material and / or a disc-like element. A desired element, which essentially corresponds to a viewing window 19, is cut out of the sheet material or the disc-like element. The term "viewing window 19" will be used hereafter. The cut-out viewing window 19 is then processed using the inkjet printing process. With the selected or desired inkjet printing process, at least a partial area 21 of the viewing window 19 is directly printed or exposed to at least one light color, creating a color film 53 on the viewing window 19 that is barely perceptible to the human eye. By applying the color to the viewing window 19, a projection surface 20 is created, which is formed directly on the viewing window 19. The projection surface 20 essentially corresponds to the color film 53.

[0059] The printed viewing window 19 can then be used for further processing. This may include, for example, bending the viewing window 19 and / or inserting and / or clamping the viewing window 19 into the door unit 13.

[0060] Direct printing of the plate-shaped material or the viewing window 19 or a direct application of the projection surface 20 or a color film 53 to the viewing window 19, as described above, is advantageously carried out before mounting the viewing window 19 in the door unit 13 of a household appliance 1. Direct printing means that no additional component is required to create the projection surface 20, but rather the projection surface 20 is printed or applied directly onto the viewing window 19.

[0061] Indirect printing of the viewing window 19 can be performed on or at an element 25, which is, for example, a film and / or an additional plate-like material. The element 25 can be formed from at least one polymer and / or glass and / or another similar material. The element 25 can also preferably be provided with a color film 53 applied using the inkjet printing process. This results in a printed element 53a. The color film 53 corresponds to the color film 53 already mentioned above and has a similar color intensity. The film is preferably attached to or at the viewing window 19 after printing. However, it is also conceivable that printing or creation of a projection surface 20 can take place after attaching the element 25. If a projection film is used, printing can also be omitted.To ensure good visibility of projection images 23 on the projection surface 20, the element 25 should be attached to the viewing pane 19 or viewing window 19 in a bubble-free manner. The viewing window 19 equipped with the projection surface 20 can then be integrated into the door unit 13 of a household appliance 1. However, it is also conceivable that the viewing window 19 is first integrated into the door unit 13 and then provided with a projection surface 20.

[0062] In Fig. 6 A further embodiment of a fluid-carrying household appliance 1a is shown. The fluid-carrying household appliance 1a has Fig. 6 The embodiment shown includes an internal device 59 and / or external device 61 for communicating between an operator or user and a fluid-conducting household appliance 1a. The internal device 59 and / or external device 61 can be a tablet, smartphone, or the like. Importantly, the internal device 59 and / or the external device 61 includes a touch-sensitive surface and / or a touch-sensitive display for displaying and setting operating and / or program parameters.

[0063] The fluid-conducting household appliance 1a has a communication unit 63. The communication unit 63 is connected to the internal device 59 and / or the external device 61 and communicates with the internal device 59 and / or the external device 61. The communication unit 63 is configured such that at least projection images 23 and / or the operating unit 25 can be transmitted to the internal device 59 and / or the external device 61. As a result, the projection surface 20 of the fluid-conducting household appliance 1a and / or the washing machine 3 can be displayed on the internal device 59 and / or the external device 61. However, it is also conceivable that the external device 61 can be attached to the fluid-conducting household appliance 1a or that an internal device 59 is formed in and / or on the fluid-conducting household appliance 1a. The internal device 59 can have similar properties to the external device 61.

[0064] Furthermore, the communication unit 63 is configured to receive input commands from the internal device 59 and / or external device 61 and transmit the input commands to a control device 69. The control device serves to control the fluid-conducting household appliance 1a, but also to control the projection unit 39 and its components. This allows the operator to communicate with the fluid-conducting household appliance 1a and / or the washing machine 3 without having to enter an input command directly into the fluid-conducting household appliance 1a and / or the washing machine 3.

[0065] The external device 61 can be a smartphone or a tablet on which the projection images 23 can be graphically displayed. Operating the fluid-conducting household appliance 1a via the external device 61 is also conceivable. The internal device 59 can be a processor. However, it is also conceivable for the internal device 59 to be a smartphone or a tablet that is detachably connected to the fluid-conducting household appliance 1a or permanently connected to the fluid-conducting household appliance 1a. Properties of the internal device 59 can be identical to properties of the external device 61.

[0066] The communication unit 63 can, for example, be arranged in the door unit 13 of a fluid-conducting household appliance 1a or a household appliance 1. However, the communication unit 63 can also be arranged at any other mounting location in the door unit. Advantageously, the communication unit 63 should be arranged in the area of ​​the projection unit 39. However, it is also conceivable for the communication unit 63 to be integrated into the projection unit 39. The communication unit 63 can be connected to the projection unit 39 wirelessly and / or via an electrical connection.

[0067] The above-described embodiments, in particular in the Fig. 3 bis 6 , are both for a household appliance 1, which is in Fig. 2 shown, as well as for a fluid-carrying household appliance 1a, which is Fig. 1 shown and are not restricted to a particular household appliance 1 or 1a mentioned as an example. Bezugszeichenliste

[0068] 1.Household appliance 1a.Fluid-conducting household appliance 3.Washing machine 5.Housing 6.Receptacle 7.Front 7a.Exterior 9.Side walls 9a.Wall elements 11.Opening 13.Door unit 15.Dispensing tray 17.Switch 19.Viewing window 20.Projection surface 21.Part of the viewing window 23.Projection image 25.Element 27.First frame element 29.Second frame element 31.Window ring 32.Handle 33.Window element 35.Cavity 37.Optical unit 38.Light beam 39.Projection unit 40.Holding device 41.Holding element 43.Mirror-like element 45.Projector 47.Computer unit 49.Control unit 51.Cooling unit 53.Color film 53a.printed element 57.interaction surface 59.internal device 61.external device 63.communication unit 69.control device

Claims

1. Household appliance (1), wherein the household appliance (1) comprises: a housing (5) with an accommodating container (6) and an opening (11); a door unit (13), wherein the door unit (13) is providing for closing off the opening (11), a viewing window (19) which is substantially arranged in the door unit (13), wherein the viewing window (19) is designed as substantially transparent, so that the accommodating container (6) can be viewed when the opening (11) is closed off, a window element (33), wherein the window element (33) and the viewing window (19) are arranged essentially opposite one another and wherein the window element (33) protrudes into the housing (5), in particular into the accommodating container (6) of the household appliance (1), when the door unit (13) is in a closed state, a projection area (20), wherein the projection area (20) is provided in the region of the viewing window (19), characterised in that the projection area (20) can be produced with an inkjet printing method such that the projection area (20) is furthermore substantially transparent.

2. Household appliance (1) according to claim 1, characterised in that the projection area (20) of the viewing window (19) has at least one film and / or a sheeting and / or is made of glass and / or at least one polymer, wherein the viewing window (19) is made of glass and / or at least one polymer.

3. Household appliance (1) according to claim 1 or 2, characterised in that an intensity of colour application onto the projection area (20) with the inkjet printing method corresponds essentially to below 50 % of the maximum possible intensity of an inkjet printing colour application.

4. Household appliance (1) according to one of the preceding claims, characterised in that the inkjet printing method comprises at least one light colour that can be applied to the projection area (20).

5. Household appliance (1) according to claim 3, characterised in that the light colour comprises different colours, wherein the light colour essentially comprises in particular a white tone and / or a number of white tones.

6. Household appliance (1) according to one of the preceding claims, characterised in that the inkjet printing takes place directly on the viewing window (19).

7. Household appliance (1) according to one of the preceding claims, characterised in that the inkjet printing takes place indirectly on the viewing window (19).

8. Method for producing a projection area (20) on a viewing window (19) of a household applicant (1) comprising providing a housing (5) with an opening (11); providing a door unit (13), wherein the door unit (13) is providing for closing off the opening (11), providing a viewing window (19) which is substantially arranged in the door unit (13), and wherein the viewing window (19) is designed as substantially transparent, so that a view into an interior of the housing (5) is ensured, providing a window element (33), wherein the window element (33) and the viewing window (11) are arranged essentially opposite one another and wherein the window element (33) protrudes into the housing (5), in particular into the accommodating container (6) of the household appliance (1), when the door unit (13) is in a closed state, providing a projection area (20), wherein the projection area (20) is provided in the region of the viewing window (19), characterised in that the projection area (20) is produced with an inkjet printing method.

9. Method according to claim 8, characterised in that the viewing window (19) is printed directly with the inkjet printing method.

10. Method according to claim 8, characterised in that the projection area (20) is produced on or on top of an element (25), wherein the element (25) is printed with the inkjet printing method and wherein the element (25) is made of at least one film and / or at least one sheeting and / or glass and / or at least one polymer.

11. Method according to claim 10, characterised in that the printed element (25) is attached to the viewing window (19).

12. Method according to one of the preceding claims, characterised in that the projection area (20) is produced with at least one light colour.

13. Method according to claim 12, characterised in that the light colour essentially comprises a white tone and / or a number of white tones.