HOUSEHOLD APPLIANCE FOR TREATING MATERIALS, HAVING A HINGE UNIT WITH AN ELECTRICAL CONDUCTOR

Description

[0001] The invention relates to a household appliance for treating items to be treated, in particular for the care of laundry according to claim 1.

[0002] A household appliance door is no longer merely an element that is suitable for closing an opening through which the item to be treated is introduced into the household appliance, but is increasingly becoming a central point for a user with regard to operating the household appliance, communicating with the household appliance and the interaction of the household appliance with the user and vice versa.

[0003] WO 2019 141 066 A1 describes a laundry care appliance that has a cable connection from the housing of the laundry care appliance to a door element of the laundry care appliance. The cable connection is guided from the housing into the door element via a hinge. The hinge has a hinge arm and a pivot arm, with a cable guide groove formed in the pivot arm in which the cable connection is guided.

[0004] EP 3 290 566 B1 describes a washing machine with a door hinge. The door hinge has a door hinge base and two hinge arms. A channel for receiving a cable harness is formed in one of the hinge arms of the door hinge. The cable harness is received in the channel and extends through an opening formed as a through hole in the door hinge base into the interior of the washing machine's housing.

[0005] Another washing machine with a door hinge and a cable duct is disclosed in CN 205 223 658 U. The door hinge has a door hinge base and two hinge arms. A channel for receiving a cable harness is formed in one of the hinge arms of the door hinge. The channel extends from the door hinge base over a hinge arm to a rotation pin of the door hinge, on which a door is rotatably mounted. The door hinge base has a recess for passing the cable harness into the interior of the washing machine's housing.

[0006] WO 2018 / 177098 A1 describes a hinge assembly for a washing machine, wherein an electrical conductor can be arranged in the hinge assembly.

[0007] US 2018 / 142399 A1 describes a washing machine having a door unit, wherein the door unit is attached to the washing machine by a hinge unit. An electrical conductor runs from the door unit via the hinge unit into a housing of the washing machine, wherein the electrical conductor runs in a cable receiving channel in the hinge unit.

[0008] CN 110 205 779 A describes a laundry care appliance with a door unit and a hinge unit connecting the door unit to the laundry care appliance, wherein an electrical conductor can be arranged in the hinge unit.

[0009] It is the object of the present invention to provide an energy and information transfer from a housing of a household appliance to a door unit, while still ensuring simple assembly.

[0010] According to one aspect of the invention, the object of the invention is achieved by a household appliance for treating items to be treated, in particular for laundry care. The household appliance comprises a housing, wherein the housing has a front wall and an opening.Furthermore, the household appliance comprises a door unit for substantially closing the opening, a hinge unit which is substantially suitable for connecting the door unit to the housing in a rotationally fixed manner, wherein the hinge unit comprises an axisymmetric hinge base, at least one first hinge arm and at least one second hinge arm, wherein the at least one first hinge arm and the at least one second hinge arm extend substantially in the direction of a surface normal of the hinge base, wherein the at least one first hinge arm comprises at least one first door receiving pin and the at least one second hinge arm comprises at least one second door receiving pin for pivotably receiving the door unit, wherein the at least one first door receiving pin and the at least one second door receiving pin extend along a door pivot axis of the door unit in opposite directions of the door pivot axis.Furthermore, one of the two hinge arms comprises a first recess, wherein a dispensing projection is formed on the respective hinge arm and the dispensing projection extends along the door pivot axis in the opposite direction to the respective door receiving pin of the respective hinge arm, wherein the dispensing projection has a second recess and wherein at least one electrical conductor for transmitting information and / or energy is received in the first recess and in the second recess, wherein the first recess (35) is substantially U-shaped and the dispensing projection (37) is substantially J-shaped, wherein the dispensing projection (37) comprises at least one holding element (51), wherein the holding element (51) is a partial region of the J-shaped casing of the dispensing projection (37).

[0011] The term 'respective hinge arm' refers to the hinge arm which has the first recess or on or in which the first recess is formed.

[0012] The term "door mounting pin" refers to mounting pins that enable a door unit to be connected to a housing of a household appliance in a rotationally fixed and / or pivotable manner. The mounting pins can also be designed or referred to as pins. Other elements or components are conceivable that are suitable for attaching a door unit to a housing, as described above. The door mounting pins are designed to be essentially parallel to the hinge base on the hinge arms.

[0013] The at least one electrical conductor can be, among other things, a cable and / or wire and / or other conventional transmission means. If one electrical conductor is sufficient to transmit power and information from the housing to the door unit and vice versa, only one electrical conductor can be formed. However, if multiple transmission means are required, multiple electrical conductors can also be formed.

[0014] The design described above ensures the transmission of energy and information from the housing of a household appliance to a door unit and vice versa. The design is easy to install, as the electrical conductor only needs to be inserted into the first and second recesses and is held in place by its receptacle, which essentially forms an L-shaped electrical conductor guide path.

[0015] The first recess is substantially U-shaped and the dispensing projection is substantially J-shaped, wherein the dispensing projection comprises at least one holding element.

[0016] This ensures that the electrical conductor can be installed both in the hinge arm itself and in the dispensing projection of the respective hinge arm on which the dispensing projection is arranged, after the hinge unit has been installed on the household appliance and / or the door unit. To further facilitate installation, the dispensing projection has a retaining element for holding the electrical conductor in the dispensing projection. The retaining element can be designed, among other things, as a retaining lug or a clip element or a retaining tab or a retaining projection.The holding element is provided to hold the at least one electrical conductor in position so that, for example, during assembly of the door unit to the hinge unit and / or vice versa, it is held in the second recess of the respective hinge arm on which the output projection is arranged, or does not jump out of the hinge unit and / or thereby make assembly more difficult.

[0017] Advantageously, at least one projection is formed on the respective hinge arm which comprises the first recess and which projects substantially into the first recess.

[0018] The projection can be configured as a rib or rib-like and is intended to accommodate the at least one electrical conductor in a desired position in the first recess or to hold the at least one electrical conductor in a desired or preferred position. In addition, the projection causes the at least one electrical conductor to be deflected.

[0019] A deflection element is formed in the first recess of the respective hinge arm, which comprises the first recess, in the region of the dispensing projection.

[0020] The at least one electrical conductor is deflected by the deflection element, so that the at least one electrical conductor is deflected from the first recess into the second recess. The at least one electrical conductor is deflected essentially by 90°, since the dispensing projection is formed essentially perpendicular to the respective hinge arm on the respective hinge arm that encompasses the first recess. The dispensing projection is arranged essentially parallel to the hinge base.

[0021] The first recess of the respective hinge arm, which includes the first recess, preferably has a guide element in the region of the dispensing projection. The guide element is provided to guide the at least one electrical conductor. The guide element is preferably designed to be inclined, with a slope of the guide element extending from the first recess toward the dispensing projection. As a result, the at least one electrical conductor is guided smoothly from the first recess into the second recess.

[0022] In order that the at least one electrical conductor is substantially invisible to a user or is accommodated in the respective hinge arm in a manner protected from external influences, at least one cover element is formed that covers the first recess and the second recess.

[0023] Advantageously, the respective hinge arm encompassing the first recess comprises a first insertion device into which the cover element can be inserted such that the first recess and the second recess are covered. Furthermore, the insertion device facilitates assembly of the cover element.

[0024] The insertion device assists in inserting the cover element during assembly. Furthermore, incorrect assembly of the cover and / or damage to the cover, such as bending and / or breaking, can be avoided or prevented.

[0025] The respective hinge arm encompassing the first recess preferably has at least one receiving element, and the cover element has at least one connecting element. The connecting element can be designed, for example, as a locking cam or as a hook, in particular a snap hook and / or a locking hook. Further fastening or connecting elements are conceivable that hold the cover element firmly in position, even when the door unit of the household appliance is in use.

[0026] The at least one connecting element is compatible with the at least one receiving element of the respective hinge arm comprising the first recess, so that the at least one connecting element can be connected to the at least one receiving element.

[0027] In other words, the recess of the respective hinge arm, which includes the first recess, has a receiving element that allows the connecting element to be firmly received in the respective hinge arm. As already described above, the connecting element can, for example, be received in the receiving element in a locking manner.

[0028] Advantageously, the cover element has a radial cover projection in the region of the dispensing projection, which radially covers the essentially J-shaped dispensing projection, so that the cover element and the dispensing projection essentially form a tubular dispensing element. Such a design of the cover element ensures that the at least one electrical conductor remains securely received in the first recess and in the second recess during further assembly of the household appliance and / or during use of the household appliance.

[0029] In an inserted state, in which the cover element is arranged in the insertion device and the at least one connecting element, the cover element is preferably arranged flush with the respective hinge arm comprising the first recess and the at least one dispensing projection. This avoids or minimizes sharp edges and / or potential protrusions on which a user and / or objects could become caught.

[0030] Advantageously, the door unit has at least two hinge receiving elements into which the first and the second door receiving pin are insertable and rotatably mounted, wherein the door unit further has a connecting unit which is arranged in the region of the hinge receiving elements, wherein the at least one electrical conductor is connectable to the connecting unit.

[0031] Preferably, the hinge unit is a surface-mounted hinge. With a surface-mounted hinge, a wider opening angle of the door unit of a household appliance can be achieved compared to a so-called plunge hinge, which is essentially arranged behind a front wall of the housing of the household appliance.

[0032] 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 household appliance for treating items to be treated, in particular for laundry care; Fig. 2 shows a door unit arranged on a housing of the household appliance; Fig. 3 shows an embodiment of a hinge unit; Fig. 4 shows an enlarged view of a hinge arm of the hinge unit; Fig. 5a shows a first embodiment of a cover element; Fig. 5b shows a second embodiment of a cover element; Fig. 5c shows a third embodiment of a cover element; Fig. 5d shows an example of an installed cover element; Fig. 6a shows a connecting unit in the door unit; Fig. 6b shows a cover element of the connecting unit; Fig. 7 shows a fluid-conducting household appliance, with an internal device and / or an external device.

[0033] In Fig. 1 is a front view of a household appliance 1 for treating items, in particular for the care of laundry. Fig. 1 The household appliance 1 shown can, for example, be a fluid-conducting household appliance 1, such as a washing machine, a washer-dryer, a tumble dryer, a dishwasher, a fully automatic coffee machine, a steamer, and / or a similar fluid-conducting household appliance. The exemplary embodiments are described below essentially with reference to the washing machine 3.

[0034] The household appliance 1 or washing machine 3 comprises a housing 5. Arranged in the housing 5 is a receptacle 6, in which, in the present exemplary embodiment, utensils to be cleaned and / or dried, for example laundry, are received or cleaned and / or dried. Furthermore, the housing 5 has a front wall 7 and side walls 9. An opening 11 is formed in the front wall 7 of the housing 5. The opening 11 can be closed with a door unit 13. The door unit 13 is attached to the housing 5 in a substantially rotatable or pivotable manner. Furthermore, a dispenser tray 15 is shown indicated in an upper region of the front wall 7 of the washing machine 3. In addition to the dispenser tray 15, a switching element 17 is arranged in an upper region of the front wall 7 of the household appliance 1. The switching element 17 can also be designed as a type of push button or the like.The switching element 17 essentially serves to switch the household appliance 1 or the washing machine 3 on or off or as a confirmation switch for confirming an operating program or an operating process.

[0035] In Fig. 1 The washing machine 3 has a display surface 20 in the door unit 13. The display surface 20 can, as in Fig. 1 For example, it can be formed on or on a viewing window 19 of the household appliance 1. For example, a presentation can be displayed on the display surface 20 by means of a projection unit (not shown). The presentation can, as in Fig. 1 shown, include a name of a washing program, a washing degree, a remaining running time of the selected washing program, and a rotation speed of the receiving container 6 as display elements 21. Further display elements 21 are conceivable.

[0036] In Fig. 2 A door unit 13 is shown arranged on a housing 5 or on the front wall 7. The door unit 13 is essentially mounted on the housing 5 in a rotationally fixed or pivotally fixed manner by means of a hinge unit 23. The hinge unit 23 is preferably designed as a surface-mounted hinge. The door unit 13 is in Fig. 2 shown in an open state.

[0037] An embodiment of a hinge unit 23 is shown in Fig. 3 and Fig. 4 shown enlarged. The hinge unit 23 comprises an axisymmetric hinge base 25. Furthermore, the hinge unit 23 comprises at least one first hinge arm 27 and at least one second hinge arm 29. The at least one first hinge arm 27 and the at least one second hinge arm 29 extend substantially in the direction of a surface normal N of the hinge base 25. At least one first door receiving pin 31 is formed on the at least one first hinge arm 27. At least one second door receiving pin 33 is formed on the at least one second hinge arm 29. The door unit 13 is pivotably or rotationally fixedly received on the at least one first door receiving pin 31 and the at least one second door receiving pin 33.The at least one first door receiving pin 31 and the at least one second door receiving pin 33 extend in opposite directions along a door pivot axis T of the door unit 13 of the door pivot axis T.

[0038] One of the two hinge arms 27, 29 comprises a first recess 35. In the following, the Fig. 3 shown upper hinge arm is referred to as at least a first hinge arm 27. Furthermore, the Fig. 3 shown lower hinge arm is referred to as at least a second hinge arm 29. In Fig. 3 For example, the at least one second hinge arm 29 is the hinge arm 29 which has the first recess 35. As already mentioned above, the at least one second hinge arm 29 which is in Fig. 3 and in the Fig. 4 bis 6b The lower hinge arm shown in each case is also conceivable. Fig. 3 The upper hinge arm shown, i.e., the at least one first hinge arm 27, has the first recess 35. However, it is also conceivable for both hinge arms 27, 29 to include a first recess 35. The first recess 35 extends substantially from the hinge base 25 to a region of one of the door receiving pins 31, 33 of the respective hinge arm 27, 29. In the following, only the exemplary embodiment will be described with reference to the at least one second hinge arm 29.

[0039] A dispensing projection 37 is formed on the at least one second hinge arm 29. The dispensing projection 37 extends along the door pivot axis T in the opposite direction to the at least one second door receiving pin 33 arranged on the at least one second hinge arm 29. The dispensing projection 37 has a second recess 39.

[0040] The first recess 35 is substantially U-shaped in the at least one second hinge arm 29. The dispensing projection 37 is substantially J-shaped and essentially surrounds the second recess 39 of the dispensing projection 37 at least partially.

[0041] An electrical conductor 41 can be accommodated or is accommodated in the first recess 35 and the second recess 39. The electrical conductor 41 is essentially suitable for transmitting information and / or energy, such as current. This allows the information and / or energy to be transmitted or conducted from the housing 5 of the household appliance 1 into the door unit 13 of the household appliance 1. For this purpose, the hinge base 25 comprises a passage 43 formed in the region of the second hinge arm 29, creating a channel-like element in which the electrical conductor 41 is guided.

[0042] The passage ensures that the electrical conductor 41 is guided from the housing 5 of the household appliance 1 through the passage 43 in the first recess 35 of the second hinge arm 29 and in the second recess 39 of the dispensing projection 37 into the door unit 13.

[0043] In Fig. 4 is shown in an enlarged view of one of the two hinge arms 27, 29 of the hinge unit 23. For example, as in Fig. 3 As already shown or explained, the lower or at least one second hinge arm 29 of the hinge unit 23 is shown. The at least one second hinge arm 29 has, for example, the first recess 35.

[0044] The first recess 35 comprises at least one projection 45 that essentially projects into the first recess 35. Furthermore, a deflection element 47 is formed in the first recess 35 in the region of the dispensing projection 37. The projection 45 and the deflection element 47 are arranged in the first recess 35 essentially opposite the at least one second door receiving pin 33. Furthermore, the first recess 35 has a guide element 49 in the region of the dispensing projection 37. The guide element 49 is formed essentially opposite the dispensing projection 37.

[0045] The projection 45 is provided to essentially fix the electrical conductor 41 in the first recess 35 during assembly and to direct it in the direction of the guide element 49. The electrical conductor 41 undergoes a 90° bend in order to move from the first recess 35 of the at least one second hinge arm 29 into the output projection 35. The deflection element 47, on the other hand, supports the electrical conductor 41 so that the electrical conductor 41, coming from the first recess 35, is bent by essentially 90°, so that the electrical conductor 41 is guided into the second recess 39. The 90° bend of the electrical conductor 41 should be carried out as harmoniously as possible by the deflection element 47, so that the electrical conductor 41 is guided from the first recess 35 into the second recess 39 essentially without damage and / or kinking and / or breaking.The deflection element 47 is supported by the guide element 49. The guide element 49 is slightly inclined and / or ramp-like and includes a gradient, starting from the first recess 35 along the surface normal of the hinge base 25, in the direction of the output projection 37. The design of the guide element 49 is suitable for guiding the electrical conductor 41, together with the deflection element 47, harmoniously through the 90° bend.

[0046] It should be mentioned again that the at least one first hinge arm 27 can also have the first recess 35 and the dispensing projection 37 and the further elements described above.

[0047] The dispensing projection 37 comprises at least one retaining element 51. The retaining element 51 is essentially a portion of the J-shaped casing of the dispensing projection 37. The retaining element 51 is a further element that facilitates the assembly of the at least one electrical conductor 41. The at least one electrical conductor 41 is held in position by the retaining element 51 in the direction of the at least one first hinge arm 27, so that the electrical conductor 41 does not represent an obstruction in the subsequent assembly process. The retaining element 51 can also be designed as a type of locking lug into which the electrical conductor 41 is clipped.

[0048] In Fig. 5a A first embodiment of a cover element 53 is shown. The cover element 53 covers the first recess 35 and the second recess 39. The cover element 53 is essentially L-shaped. The cover element 53 has at least one connecting element 55. The Fig. 5a bis 5c The cover element 53 shown is designed in such a way that it is flush with the U-shaped first recess 35 and the J-shaped second recess 39, so that no noticeable transitions and / or edges or corners arise between the elements.

[0049] The at least one second hinge arm 29 comprises a first insertion device 57. The cover element 53 comprises an insertion rib 59. The cover element 53 can be inserted into the insertion device 57 of the at least one second hinge arm 29 by means of the insertion rib 59 such that the first recess 35 and the second recess 39 are covered. Furthermore, the at least one second hinge arm 29 comprises a receiving element 61. The receiving element 61 is in Fig. 5a formed in the first recess 35 of the at least one second hinge arm 29. The at least one connecting element 55 of the cover element 53 is connectable to the receiving element 61 of the at least one second hinge arm 29 or is designed to be compatible such that the connecting element 55 is connectable to the receiving element 61. The connecting element 55 can preferably be designed as a snap-in and / or locking hook. The receiving element 59 can preferably be designed as a locking lug and / or eyelet and / or a similarly designed receiving element.

[0050] The cover element 53 has a radial cover projection 63 in the region of the dispensing projection, at least in the assembled state of the cover element 53. The cover projection 63 is designed such that the substantially J-shaped dispensing projection 37 is covered in the radial direction, so that the cover element 53 and the dispensing projection 37 essentially form a tubular dispensing element 64.

[0051] In Fig. 5b A second embodiment of a cover element 53 is shown. The second embodiment of the cover element 53 differs from the first embodiment in that the at least one connecting element 55 comprises two locking cams 65. The locking cams 65 each engage in a receiving element 61 of the at least one second hinge arm 29. The two receiving elements 61 are formed on opposite sides of the first recess 35 of the at least one second hinge arm 29.

[0052] In Fig. 5c A third embodiment of a cover element 53 is shown. The third embodiment of the cover element 53 differs from the first and second embodiments of the cover element 53 in that the at least one connecting element 55 is designed as a latching hook 66 that can be connected to the receiving element 61, wherein the receiving element 61 is formed outside the first recess 35 of the at least one second hinge arm 29.

[0053] A mounted or inserted cover element 53 is in each case in the Fig. 5d and 6a shown. In Fig. 5d The third embodiment of a cover element 53 is shown inserted into the at least one second hinge arm 29. In Fig. 6a The first embodiment of a cover element 53 is shown inserted into the at least one second hinge arm 29 by way of example. In the inserted state, i.e., the cover element 53 is connected to the hinge arm 29, in particular arranged flush with the second hinge arm 29.

[0054] In Fig. 5d The connecting element 55 of the cover element 53, which in the third embodiment is designed as a latching hook 66, is inserted into the receiving element 61 formed for this purpose in the first recess 35, so that the first and second recesses 35, 39 are covered. Furthermore, the cover element 53, together with the dispensing projection 37, essentially forms a tubular dispensing element 64. This means that the electrical conductor 41 is guided under the cover element 53 in the first and second recesses 35, 39 and is dispensed from the second recess 39 via the dispensing projection 37.

[0055] In Fig. 6a a connecting unit 67 is shown in the door unit 13. The connecting unit 67 is designed as a socket and / or as a plug-in element. The door unit 13 comprises at least two hinge receiving elements 68, into which the first and second door receiving pins 31, 33 are insertable and rotatably mounted. The connecting unit 67 is arranged in the region of the hinge receiving elements 68. In an assembled state of the hinge unit 23 and the door unit 13, the connecting unit 67 is arranged in the door unit 13 in the region of the output projection 37 such that the at least one electrical conductor 41 can be connected to the connecting unit 67, so that information and / or energy can be or is transmitted via the at least one electrical conductor 41 from the housing 5 of the household appliance 1 to the door unit 13.

[0056] Furthermore, Fig. 6a the at least one second hinge arm 29 of the hinge unit 23 is shown. The cover element 53 is in Fig. 6a placed on the first recess 35 and the second recess 39. The electrical conductor 41 is in Fig. 6a not shown for illustrative purposes.

[0057] In Fig. 6b A cover element 69 of the connecting unit 67 is shown. After the electrical conductor 41 has been mounted to the connecting unit 67, the cover element 69 is attached to the door unit 13 via the electrical conductor 41 and the connecting element 67. Preferably, the cover element 69 is arranged adjacent to the dispensing projection 37 and / or to the cover element 53 in the door unit 13, so that the electrical conductor 41 is essentially invisible or cannot be touched by a user.

[0058] In Fig. 7 Another embodiment of a household appliance 1 for treating items to be treated, in particular for the care of laundry, is shown. The household appliance 1 has Fig. 7 The embodiment shown includes an internal device 91 and / or external device 93 for communicating between an operator or user and a fluid-conducting household appliance 1. The internal device 91 and / or external device 93 can be a tablet, smartphone, or the like. It is important that the internal device 91 and / or the external device 93 includes a touch-sensitive surface and / or a touch-sensitive display for displaying and setting operating and / or program parameters. The operating and / or program parameters can be displayed on the display surface 20.

[0059] The household appliance 1 has a communication unit 95. The communication unit 95 is connected to the internal device 91 and / or the external device 93 and communicates with the internal device 91 and / or the external device 93. The communication unit 95 is configured such that at least projection images 23 can be transmitted to the internal device 91 and / or the external device 93. As a result, the display surface 20 of the household appliance 1 and / or the washing machine 3 can be displayed on the internal device 91 and / or the external device 93. However, it is also conceivable that the external device 93 can be attached to the household appliance 1 or that an internal device 91 is formed in and / or on the household appliance 1. The internal device 91 can have similar properties to the external device 93.

[0060] Furthermore, the communication unit 95 is configured to receive input commands from the internal device 61 and / or external device 93 and transmit the input commands to a control device 97. The control device 97 serves to control the household appliance 1, but also to control the projection unit 39 and its components. This allows the operator to communicate with the household appliance 1 and / or the washing machine 3 without having to enter an input command directly on the household appliance 1 and / or the washing machine 3.

[0061] The external device 95 can be a smartphone or a tablet on which the display elements 21 can be graphically displayed. Operating the household appliance 1 via the external device 93 is also conceivable. The internal device 91 can be a processor. However, it is also conceivable that the internal device 91 is a smartphone or a tablet that is detachably connected to the household appliance 1 or permanently connected to the household appliance 1. Properties of the internal device 91 can be identical to properties of the external device 93.

[0062] The communication unit 95 can, for example, be arranged in the door unit 13 of a household appliance 1 or a washing machine 3. However, the communication unit 95 can also be arranged at any other mounting location in the door unit 13. Advantageously, the communication unit 95 should be connected to the at least one electrical conductor 41 for transmission purposes. The communication unit 95 can, for example, draw power via the electrical conductor 41, but transmit information wirelessly. However, it is also conceivable for the communication unit 95 to transmit power and information, which are transmitted, for example, from the control device 97, which is arranged, for example, in the housing 5 of the household appliance 1, and / or are emitted by the control device 97, via the electrical conductor 41.

Claims

1. Household appliance (1) for treating items to be treated, in particular for laundry care, wherein the household appliance (1) comprises: a housing (5), wherein the housing (5) has a front wall (7) and an opening (11); a door unit (13) for essentially closing off the opening (11), a hinge unit (23), which is essentially suitable for connecting the door unit (13) to the housing (5) in a rotationally fixed manner, wherein the hinge unit (23) comprises an axially symmetric hinge base (25), at least one first hinge arm (27) and at least one second hinge arm (29), wherein the at least one first hinge arm (27) and the at least one second hinge arm (29) extend essentially in the direction of a surface normal (N) of the hinge base (25), wherein the at least one first hinge arm (27) comprises a first door receiving pin (31) and the at least one second hinge arm (29) comprises a second door receiving pin (33) for receiving the door unit (13) in a pivotable manner, wherein the one first door receiving pin (31) and the one second door receiving pin (33) extend along a door pivot axis (T) of the door unit (13) in opposite directions to the door pivot axis (T), wherein one of the two hinge arms (27, 29) comprises a first recess (35), wherein a release projection (37) is embodied on the respective hinge arm (27, 29) and the release projection (37) extends along the door pivot axis (T) in the opposite direction to the respective door receiving pin (31, 33) of the respective hinge arm (27, 29), characterised in that the release projection (37) has a second recess (39) and wherein at least one electric conductor (41) for transferring information and / or energy is accommodated in the first recess (35) and the second recess (39), wherein the first recess (35) is essentially embodied in a U-shape and the release projection (37) is essentially embodied in a J-shape, wherein the release projection (37) comprises at least one retaining element (51), wherein the retaining element (51) is a subregion of a J-shaped cladding of the release projection (37).

2. Household appliance (1) according to claim 1, characterised in that at least one projection (45), which essentially projects into the first recess (35), is embodied on the respective hinge arm (27, 29) which comprises the first recess (35).

3. Household appliance (1) according to claim 1 or 2, characterised in that a deflection element (47) is embodied in the region of the release projection (37) in the first recess (35) of the respective hinge arm (27, 29) which comprises the first recess (35).

4. Household appliance (1) according to one of the preceding claims, characterised in that the first recess (35) of the respective hinge arm (27, 29) which comprises the first recess (35) has a guide element (49) in the region of the release projection (37).

5. Household appliance (1) according to one of the preceding claims, characterised in that the at least one cover element (53) is embodied, which covers the first recess (35) and the second recess (39).

6. Household appliance (1) according to one of the preceding claims, characterised in that the respective hinge arm (27, 29) which comprises the first recess (35) comprises a first insertion apparatus (57), into which the cover element (53) can be inserted such that the first recess (35) and the second recess (39) are covered.

7. Household appliance (1) according to claim 5 or 6, characterised in that the respective hinge arm (27, 29) which comprises the first recess (35) has at least one receiving element (61) and the cover element (53) has at least one connection element (55).

8. Household appliance (1) according to claim 7, characterised in that the at least one connection element (55) is compatible with the at least one receiving element (61) of the respective hinge arm (27, 29) which comprises the first recess (35), such that the at least one connection element (55) can be connected to the at least one receiving element (61).

9. Household appliance (1) according to one of claims 5 to 8, characterised in that the cover element (53) has a radial cover projection (63) in the region of the release projection (37), which cover projection covers the essentially J-shaped release projection (37) in the radial direction such that the cover element (53) and the release projection (37) essentially form a tubular release element (64).

10. Household appliance (1) according to one of claims 5 to 9, characterised in that, in an inserted state, in which the cover element (53) is arranged in the insertion apparatus (57) and in the at least one connection element (55), the cover element (53) is arranged flush with the respective hinge arm (27, 29), which comprises the first recess (35), and with the at least one release projection (37).

11. Household appliance (1) according to one of the preceding claims, characterised in that the door unit (13) comprises at least two hinge receiving elements (68) in which the first and the second door receiving pins (31, 33) are mounted such that they can be inserted and rotated, wherein the door unit (13) furthermore has a connection unit (67) which is arranged in the region of the hinge receiving elements (68), wherein the at least one electric conductor (41) can be connected to the connection unit (67).

12. Household appliance (1) according to one of the preceding claims, characterised in that the hinge unit (23) is a mounting hinge.