Dishwasher and methods for operating a dishwasher

Abstract

Dishwasher (1), in particular a household dishwasher, with a wash tub (2) which can be closed by a door (3), a dishware holder (10) which is movably arranged in the wash tub (2) and which is movable between a starting position (A) and an end position (E), a receiving unit (112) arranged on the dishware holder (10) but not on the door (3), and a transmitting unit (110) arranged on an inside of the door (3) for inductively transmitting electrical energy to the receiving unit (112), wherein a door-penetrating functional unit (102) is arranged on the door (3), wherein the transmitting unit (110) is coupled to the functional unit (102), and wherein the transmitting unit (110) on the inside of the door (3) and the receiving unit (112) on the front of the dishware holder (10) are arranged relative to each other such that that the transmitting unit and the receiving unit are directly opposite each other,when the door (3) is in a closed position and the dishwashing tray (10) is in the starting position (A), so that the electrical energy can be inductively transferred from the transmitting unit (110) to the receiving unit (112).

Description

[0001] The present invention relates to a dishwasher and a method for operating a dishwasher.

[0002] Dishwashers, especially household dishwashers, have a wash chamber that can be closed by a door and contains a dish rack. To improve usability, they have various electrically operated devices, such as a control panel or a sensor unit, located on the dish rack. The question then arises as to how the necessary electrical energy to operate these devices can be supplied.

[0003] EP 2 374 398 A2 discloses a method for providing a dishwasher user with information about an operating status or a wash program by means of at least one display on a dish rack. This has the advantage that the user can easily read the display even with the door open and the dish rack pulled out. The necessary electrical energy is supplied, for example, by a battery.

[0004] DE 10 2010 015 849 B3 discloses a dishwasher which, to improve usability, has a lighting device attached to one of the dish baskets. The lighting device is powered by a rechargeable energy storage device, which is charged by a contactless charging device.

[0005] DE 10 2014 100 799 A1 discloses a dishwasher with electrically consuming system components that are powered by a battery. The battery is, for example, arranged on a dishwashing basket and is charged when the basket is in the working position. For this purpose, an electrically conductive cable connection is made when the dishwashing basket is moved into the working position.

[0006] US Patent 2013 / 0228202 A1 discloses a dishwasher with a split door, wherein the upper half of the door can be mechanically coupled to the upper dish rack, and the resulting mechanical unit can be removed from the dishwasher body as a drawer. Among other things, an inductive coupling between the upper and lower parts of the door or between the upper part of the door and the dishwasher body is proposed to supply electrical power to the user interface located in the upper part of the door.

[0007] DE 102 62 291 B4 deals with a method for controlling the hardness of the rinsing liquid when rinsing items in a dishwasher.

[0008] DE 10 2013 226 910 A1 discloses a lifting device for a dishwashing container of a water-bearing household appliance, wherein the lifting device is designed to raise the dishwashing container when moving it out of the dishwashing container and to lower it when moving it into the dishwashing container, wherein the lifting device has a drive device and a control device.

[0009] WO 2010 / 015 367 A2 discloses a household appliance with a program control system optimized for use with a dosing device not permanently installed in the appliance. This optimization can be achieved, among other things, by wirelessly exchanging information between the program control system and the dosing device.

[0010] DE 10 2011 084 459 B3 discloses a dishwasher with a dishware container from which a dish basket can be extended horizontally, and on which a light element is arranged. The power supply can be provided by a replaceable battery on the dish basket or by an electrically conductive connection between the dish basket and an external power source.

[0011] Against this background, an object of the invention is to create an improved way of supplying electrical energy to an electrical consumer which is arranged on a movable dishwashing tray of a dishwasher.

[0012] According to a first aspect, a dishwasher, in particular a household dishwasher, is proposed with a wash tub that can be closed by a door. A dishwashing basket with a user interface is movable within the wash tub. The dishwashing basket can be moved between a starting position and an end position. A transmitter unit is located on the inside of the door, which is configured for the inductive transmission of electrical energy to a receiver unit coupled to the user interface. The transmitter unit on the inside of the door and the receiver unit on the dishwashing basket are arranged relative to each other such that electrical energy can be transferred from the transmitter unit to the receiver unit when the door is in a closed position and the dishwashing basket is in its starting position.

[0013] This makes it advantageously possible to supply a user interface located at the dishwashing area with electrical energy without, for example, the need for a cable.

[0014] The movable dish rack can be pulled out of and / or pushed into the wash tub using rails. This allows for particularly convenient loading and unloading of the dish rack. The dish rack can also be completely removed from the wash tub, for example, to facilitate maintenance work inside the tub. Because the user interface is inductively powered, other, more unreliable methods of power supply, such as a plug connection, are unnecessary. Furthermore, inductive transmission allows for power transfer without exposed, live contacts, thus improving the operational safety and reliability of the dishwasher.

[0015] A user interface is, for example, a display designed to show operational information, such as the operating status of the dishwasher. The user interface can also include controls such as buttons, switches, and / or knobs, as well as sensors that detect user input and / or actions. Examples include selecting a wash program and / or removing / inserting the dish rack from / into the wash tub. The user interface is powered by electrical energy, which in this case is transmitted inductively from the transmitting unit to the receiving unit and supplied to the user interface by the receiving unit.

[0016] The dishware holder can be moved between a starting position and a final position. The starting position is, in particular, the position within the wash tub where the dishware holder is located when the dishwasher is operating. The final position is, in particular, a position outside the wash tub where the dishware holder is loaded and / or unloaded. Moving the dishware holder from the starting position to the final position can, for example, be accomplished along a rail. It is also possible for the dishware holder to be fixed to a lifting device designed to move the dishware holder to the final position, which is a position higher than the starting position.Such an elevated position allows for more comfortable use of the dishwasher by the user, in particular loading and / or unloading the dishwashing area with dishes.

[0017] The transmitting unit is designed, for example, as a transmitting coil that generates a magnetic field when current flows through it. The transmitting coil can also be referred to as the first coil. Advantageously, the transmitting unit is positioned on the inside of the door and can be powered via a power cable. This arrangement has the advantage that no objects interfering with the magnetic field, such as a stainless steel sheet, are located on the side of the transmitting unit facing the sink. Thus, there is no artificial damping of the magnetic field, which improves the efficiency of the inductive energy transfer.

[0018] The receiving unit is, for example, designed as a receiving coil in which an electric current can be induced by means of a magnetic field. The receiving coil can also be referred to as a second coil. According to the invention, the receiving unit is arranged at the front of the dishwashing tray so that the transmitting unit and the receiving unit are directly opposite each other when the door is closed and the dishwashing tray is in its starting position. Advantageously, the distance between the transmitting unit and the receiving unit in this position is comparatively small, advantageously less than 10 mm, preferably less than 5 mm.

[0019] The transmitter and receiver units are advantageously each housed in a fluid-tight enclosure made of plastic, at least on the side facing the other unit. This increases the reliability of the inductive power transfer and enables high efficiency.

[0020] According to one embodiment of the dishwasher, a first data transmission device associated with the user interface and a second data transmission device for wireless data transfer are provided.

[0021] The first and second data transmission devices are designed, for example, to transmit data using electromagnetic waves. Examples include infrared, radio, Bluetooth, Wi-Fi, visible light wavelengths, and the like.

[0022] The second data transmission device can be located inside the dishwasher tub or on the inside of the door. Alternatively, it can be located outside the dishwasher tub. Furthermore, multiple second data transmission devices can be provided; in particular, data transmission via a device independent of the dishwasher, such as a smartphone, is conceivable.

[0023] The first and / or second data transmission device can also be an integral part of the transmitting or receiving unit. In particular, the transmitting or receiving coil can be used as an antenna for data transmission.

[0024] Data transmission can be either unidirectional or bidirectional. For example, the first data transmission device can transmit sensor data from the user interface to the second data transmission device. Conversely, the second data transmission device can also transmit operating parameters to the first data transmission device.

[0025] The first data transmission device is supplied with electrical energy from the receiving device.

[0026] According to a further embodiment of the dishwasher, the user interface includes a display device for displaying at least one operating parameter of the dishwasher, an operating device for operating the dish loading and / or the dishwasher and / or a sensor for detecting at least one operating parameter of the dishwasher.

[0027] A display device includes, for example, one or more light-emitting diodes and / or a liquid crystal display. An operating device includes, for example, one or more sensors and / or controls, such as buttons, switches, and / or rotary knobs. A touchscreen display may also be provided, which combines the functions of the display device and the operating device. Such an operating device allows a user, for example, to select a specific dishwasher program.

[0028] By arranging the control unit at the dishwashing area, it is advantageous to omit a control unit for operating the dishwasher which is located on the outside of the door.

[0029] The user interface can also include one or more sensors. For example, the user interface might have a force sensor that detects a force acting, for instance, on a handle on the dishwashing tray. Depending on the detected force, a lifting device that assists in moving the dishwashing tray can be controlled. Furthermore, a sensor can be provided that detects the door's open position, such as a proximity sensor.

[0030] The advantage of a display and / or control panel located on the dish loading area becomes apparent, for example, when loading and / or unloading the dishwasher, as the door is then in an open position. In this situation, the door's outer surface faces downwards, where it is not visible to the user. Therefore, a user cannot see or operate a display and / or control panel located on the front of the door. Similarly, a display and / or control panel located on the top of the door is very difficult to read or operate when the door is open. In these cases, a display and / or control panel located on the dish loading area allows for convenient viewing and / or operation.

[0031] The display unit is specifically designed to show operating parameters and / or operating states of the dishwasher. Advantageously, this information is transmitted wirelessly from a second data transmission unit to a first data transmission unit associated with the display unit. Dishwasher operating parameters include, for example, the selected dishwashing program, the fill level of consumables such as rinse aid, water softener salt, and / or detergent, or other information such as the load status of the dish rack.

[0032] Advantageously, user inputs captured by the control unit and / or sensor data captured by sensors are transmitted from the first data transmission unit to the second. This makes it possible to evaluate the captured user inputs and / or sensor data for operating the dishwasher, for example, to start a specific wash program and / or to control a lifting device.

[0033] According to the invention, the dishwasher has a functional unit arranged on the door that penetrates the inner door, wherein the transmitting unit is coupled to the functional unit.

[0034] The door of a dishwasher, for example, comprises an outer casing, a heat- and sound-insulating cavity, and an inner wall, which may be made of stainless steel. The inner wall is also referred to as the inner door.

[0035] A functional unit that penetrates the inner door is therefore a unit that protrudes from the outside, for example from the space between the door and the basin, through the inner door and into the wash tank. An example of this would be a dosing device and / or an ion generator.

[0036] By coupling the transmitter unit with the door-penetrating functional unit, the transmitter unit can be positioned particularly easily on the inside of the door in such a way that a wall or interfering object that could shield the inductive energy transfer is excluded. This ensures high efficiency of the inductive energy transfer.

[0037] According to another embodiment of the dishwasher, the inner door-penetrating functional unit has an addition device, wherein the sending unit is coupled to the addition device.

[0038] This embodiment advantageously allows the dispensing device and the transmitter unit to be housed in a single component. This reduces manufacturing costs and simplifies dishwasher assembly.

[0039] The dispensing device is specifically designed for adding detergent, rinse aid, and / or other chemically active substances to the wash tank during a wash cycle. For this purpose, the dispensing device includes, for example, different containers for each respective chemical.

[0040] According to a further embodiment of the dishwasher, it also features a lifting device with an electric drive unit. This unit is designed to move the dishware holder between its starting and ending positions. The user interface is located in a handle of the dishware holder and includes a force sensor. The force sensor is designed to detect a force acting on the handle. The first data transmission device is designed to transmit the force detected by the force sensor to the second data transmission device. The second data transmission device is associated with a control unit, which is designed to control the electric drive unit for moving the dishware holder based on the detected force.

[0041] This type of lifting device allows for particularly convenient operation of the dishwasher. The force sensor, positioned in the handle, precisely detects the force exerted by the user on the dish rack. This enables highly accurate assistance for the user when lifting and / or lowering the rack. In particular, this prevents false activation of the lifting device, for example, due to an incorrectly measured force.

[0042] The electric drive unit is, for example, an electric motor. The electric motor can, for example, raise, lower, extend, retract, and / or swivel the dishwashing tray.

[0043] The control unit is designed, for example, as an integrated circuit. In particular, the control unit is suitable for evaluating the data received from the second data transmission device and controlling the electric drive unit with a movement property. This movement property includes, for example, a lifting speed when raising or lowering the dishwashing tray, a starting position height, and / or a final position height.

[0044] Furthermore, the control unit can monitor and / or control other functions of the dishwasher. This includes, in particular, running a wash program with various cycles such as a pre-wash cycle, a main wash cycle, a rinse cycle, and / or a drying cycle.

[0045] According to another embodiment of the dishwasher, the control unit has an associated memory unit. The memory unit is configured to store a plurality of different motion characteristics, wherein the motion characteristic includes a lifting speed when raising or lowering the dishware tray, a starting position height, and / or a final position height. The control unit is configured to select the motion characteristic for controlling the electric drive unit from the plurality of stored motion characteristics, depending on the detected force.

[0046] The storage unit is primarily designed as an integrated circuit. For example, various different motion characteristics can be stored at the factory.

[0047] For example, a user pulls very hard on the handle. The force sensor then detects a very high force. This is transmitted from the first data transmission device to the second data transmission device and evaluated by the control unit. With a very high force, the control unit selects, for example, a very high lifting speed as the movement characteristic.

[0048] For example, if the dishware holder is at a height corresponding to 80% of its maximum height, the user releases the pressure, so the measured force is minimal. The control unit then selects a low lifting speed as the movement characteristic. This slows down the lifting of the dishware holder, allowing the user good control over the height.

[0049] As soon as the user releases the handle, the movement is also stopped by the electric drive unit. This eliminates accidental movements, such as those that can occur with push buttons for raising and / or lowering.

[0050] The storage unit also allows each user to save a preferred height and / or preferred lifting speed depending on the detected force.

[0051] According to another embodiment of the dishwasher, an energy storage unit is provided for the receiving unit, which is designed to store the energy transferred from the transmitting unit to the receiving unit when the door is closed and to supply the user interface with the stored energy.

[0052] The energy storage unit includes, for example, a capacitor and / or a battery.

[0053] This allows the user interface to operate for a certain period even without a current inductive power supply. Specifically, when the door is in the open position, the user interface and all its associated units can be powered.

[0054] According to a further embodiment of the dishwasher, it includes a sensor device for detecting a loading characteristic of the dishware intake. In particular, the second data transmission device is associated with the sensor device and is configured to transmit the detected loading characteristic to the first data transmission device. Furthermore, the user interface is designed as a display device and is configured to output the loading characteristic received from the first data transmission device.

[0055] One loading characteristic is, for example, the weight of the items placed in the dish rack. This allows the user to be warned if, for instance, a dish rack is overloaded, thus preventing damage to components such as the electrical drive. Uneven loading of two dish racks can also be indicated, allowing the user to rearrange the items. This ensures efficient operation of the dishwasher.

[0056] According to another embodiment of the dishwasher, the user interface has an input device configured to capture user input. The first data transmission device is then configured to transmit the captured user input to the second data transmission device.

[0057] According to another embodiment of the dishwasher, the transmitting unit has a coupling unit which is designed to determine a coupling state of the transmitting unit with the receiving unit and to activate inductive energy transfer depending on the determined coupling state.

[0058] This embodiment has the advantage that the transmitting unit is only activated when a coupling state with the receiving unit exists. This avoids the potentially dangerous generation of magnetic fields. Furthermore, it improves energy transmission efficiency.

[0059] According to a second aspect, a method for operating a dishwasher, in particular a household dishwasher, is proposed. The dishwasher has a wash tub that can be closed with a door and a dishwashing basket that is movable within the wash tub. A user interface is arranged on the dishwashing basket, which is movable between a starting position and an end position. The method comprises the inductive transmission of electrical energy from a transmitter unit located on the inside of the door to a receiver unit located on the dishwashing basket when the door is in a closed position and the dishwashing basket is in its starting position.

[0060] This method makes it possible, in particular, to operate a dishwasher according to one of the embodiments described in the first aspect.

[0061] Other possible implementations of the invention also include combinations of features or embodiments described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In such cases, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0062] 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. Fig. Figure 1 shows a perspective view of a first embodiment of a dishwasher; Fig. Figure 2A shows a schematic view of a second embodiment of a dishwasher in an open position with a dishwashing basket in an end position; Fig. Figure 2B shows a schematic view of the second embodiment of the dishwasher in a closed position with the dishwashing basket in a starting position; Fig. 3A shows a section of an exemplary embodiment of a dishwashing tray with a handle; Fig. Figure 3B shows a section of an embodiment of a door with an addition device in a closed position; and Fig. Figure 4 shows an embodiment of a method for operating a dishwasher.

[0063] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0064] In Fig. Figure 1 shows a perspective view of a first embodiment of a dishwasher 1. The dishwasher 1 has a body comprising a wash tub 2 and a door 3. The wash tub 2 and the door 3 form a wash chamber 4 for washing dishes. The door 3 is in Fig. 1 is shown in its open position. By pivoting about a pivot axis S provided at a lower end of the door 3, the door 3 can be closed or opened.

[0065] The washing container 2, for example, is cuboid in shape and can comprise a base 5, a top 6 opposite the base 5, a back wall 7 opposite the door 3, and two opposing side walls 8, 9. In particular, the side walls 8, 9 can be made of stainless steel sheet.

[0066] The dishwasher 1 further comprises at least one load holder 10. In particular, several load holders 10 may be provided, which may include a lower basket, an upper basket and / or a cutlery drawer. The several load holders 10 are preferably arranged one above the other in the wash tub 2. Each load holder 10 is optionally inserted into the wash tub 2 in a starting position A (see figure). Fig. 2B) or in an extension direction 13 from this into a final position E (see Fig. 2A) can be moved. In this example, the Fig. 1 A rail 11 is provided on both sides of each dishwashing tray 10.

[0067] The lower dishwashing tray 10 has a user interface 100 on its front side and a receiving unit 112 coupled to the user interface 100. The receiving unit 112 is configured to receive electrical energy and to supply electrical energy to the user interface 100.

[0068] A transmitter unit 110 provided on the door 3 of the dishwasher 1 is designed to inductively transmit electrical energy to the receiver unit 112 when the door 3 is in the closed state and the lower dish holder 10 is in the starting position A (see Fig. 2B).

[0069] For example, dishwasher 1 can be a freestanding, an integrated or a fully integrated dishwasher 1.

[0070] Fig. Figure 2A shows a schematic view of a second embodiment of a dishwasher 1 with the door 3 open and the dishware intake 10 in the end position E. The dishwasher 1 has, in particular, a lifting device 15 which can be operated by means of two electric drive units 16. The lifting device 15 is designed to lift the dishware intake 10 from the starting position A (see Figure 2A). Fig. 2B) into the in the Fig. 2A to lift the end position E shown forward and upward.

[0071] The dishwashing tray 10 has a receiver 112 on its front. The receiver 112 includes an energy storage unit 116. Furthermore, the dishwashing tray 10 has a handle 14, on which a display unit 104 and a force sensor 114 are arranged. Together, the handle 14, the display unit 104, and the force sensor 114 form the user interface 100, which also includes a first data transmission unit 130. The data transmission unit 130 is configured to transmit data 134 via a Bluetooth connection. In the end position E, the electrical energy is supplied by the energy storage unit 116.

[0072] Door 3 of dishwasher 1 is in the Fig. 2A is shown in its open position. On the inside of the door 3, an insertion device 106 is arranged with a transmitter unit 110 mounted on the insertion device 106. A coupling unit 118 is also associated with the transmitter unit 110, which detects a coupling with the receiver unit 112. In this embodiment, the insertion device 106 forms a functional unit 102 that penetrates the inside of the door. In the open position, the coupling unit 118, for example, does not detect a coupling, which is why the transmitter unit 110 is deactivated.

[0073] Furthermore, the dishwasher 1 has a control unit 17 arranged on the ceiling 6, to which a storage unit 18 for storing movement properties and the second data transmission device 132 are assigned. The second data transmission device 132 is also configured to transmit data 134 via Bluetooth. The control unit 17 is specifically configured to control the electric drive unit 16 for activating the lifting device 15 for raising and / or lowering the dishwashing tray 10.

[0074] For example, the force sensor 114 detects a force exerted by a user on the handle 14. The detected force is transmitted via Bluetooth from the first data transmission device 130 to the second data transmission device 132 as data 134. The control unit 17 evaluates the data 134 with regard to the force detected by the force sensor 114 and, depending on this, accesses the storage unit 18 to determine a movement characteristic. Using the determined movement characteristic, the control unit 17 then controls the electric drive unit 16.

[0075] Fig. Figure 2B shows the second embodiment of the dishwasher 1 with the door 3 closed and the dish loading unit 10 in the initial position A. In this position, the transmitting unit 110 is in close proximity to the receiving unit 112. Therefore, the coupling unit 118 detects a coupling state that allows energy transfer. In the position shown, electrical energy can thus be inductively transferred. For example, the energy storage unit 116 is then charged.

[0076] Fig. Figure 3A shows a section of an embodiment of a dishwashing container 10 with a handle 14 in which a receiving unit 112, a first data transmission unit 130, a force sensor 114 and an energy storage unit 116 are integrated (in Fig. 3A not visible, see e.g. Fig. 2A, Fig. 2B). The dishware holder 10 is shown in section as a wire basket. The handle 14 serves to reposition the dishware holder 10, for example as shown in one of the embodiments of the Fig. 1 or Fig. 2A, Fig. 2B explained.

[0077] Fig. Figure 3B shows a section of an embodiment of a door 3 with an insertion device 106 in a closed position. A transmitter unit 110, designed for the inductive transmission of electrical energy, is integrated into the insertion device 106. Opposite the door 3 is the handle 14, which is located in the Fig. The dishwashing tray 10 shown in Figure 3A is shown. In this closed position of the door 3, the transmitter unit 110 and the receiver unit 112 integrated in the handle 14 are arranged very close to each other, which enables efficient transmission of electrical energy by induction.

[0078] Fig. Figure 4 shows an embodiment of a method for operating a dishwasher 1, for example the dishwasher 1 of the Fig. 1 or the Fig. 2A, Fig. 2B. The dishwasher 1 has a wash container 2 that can be closed with a door 3 and a wash container 10 that is movable within the wash container 2, with a user interface 100 being arranged on the wash container 10. The wash container 10 is movable between a starting position A and an end position E.

[0079] The method comprises the following steps: Inductive transmission S1 of electrical energy from a transmitter unit 110 located on the inside of the door 3 to a receiver unit 112 located on the dishware holder 10, when the door 3 is in a closed position and the dishware holder 10 is in the starting position A; and provision S2 of electrical energy from the receiver unit 112 to the user interface 100 associated with the receiver unit 112, for the purpose of operating the user interface 100.

[0080] Furthermore, the method may include additional steps not shown, in particular: determining a coupling state of the transmitting unit 110 and the receiving unit 112 by means of a coupling unit 118 assigned to the transmitting unit 110; activating the transmitting unit 110 depending on the determined coupling state; transmitting data 134 from a first data transmission unit 130 assigned to the user interface 100 to a second data transmission unit 132; detecting a user input and / or a force by means of an input device arranged on a front side of the dishwashing container 10.a force sensor 114 arranged on a handle 14; controlling an electric drive device 16 with a movement property by means of a control unit 17; reading a movement property from a storage unit 18 assigned to the control unit 17 as a function of the determined force; outputting an operating parameter of the dishwasher 1 by means of a display device 104 arranged on a front of the dishwashing basket 10; and storing electrical energy in an energy storage unit 116 assigned to the receiving unit 112.

[0081] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. In particular, a different arrangement of the described units and devices than that shown in the figures is possible. Reference symbols used 1 dishwasher 2 washing containers 3 Door 4. Dishwashing area 5 Floor 6 Ceiling 7 Back panel 8 side wall 9 side wall 10 Dishwashing tray 11 rail 12 Insertion direction 13 Extraction direction 14 Handle 15 Lifting device 16 electric drive unit 17 Control unit 18 storage units 100 User Interface 102 interior door-penetrating functional unit 104 Display unit 106 Addition device 110 transmitting units 112 Receiving unit 114 Force sensor 116 Energy storage unit 118 Coupling unit 130 first data transmission device 132 second data transmission device 134 data A Starting position E End position S axis S1 Procedure step S2 process step

Claims

[1] Dishwasher (1), in particular a household dishwasher, with a wash tub (2) which can be closed by a door (3), a dishware holder (10) which is movable in the wash tub (2) and which is movable between a starting position (A) and an end position (E), a receiving unit (112) which is arranged on the dishware holder (10) but not on the door (3), and a transmitting unit (110) which is arranged on an inside side of the door (3) for inductively transmitting electrical energy to the receiving unit (112), wherein a door-penetrating functional unit (102) is arranged on the door (3), wherein the transmitting unit (110) is coupled to the functional unit (102), and wherein the transmitting unit (110) is arranged on the inside side of the door (3) and the receiving unit (112) is arranged on the front side of the dishware holder (10) relative to each other in such a way as to are,so that the transmitting unit and the receiving unit are directly opposite each other when the door (3) is in a closed position and the dishwashing tray (10) is in the starting position (A), so that the electrical energy can be inductively transferred from the transmitting unit (110) to the receiving unit (112). [2] Dishwasher according to claim 1, wherein a user interface (100) is arranged on the dish receiving unit (10), which is electrically and / or mechanically coupled to the receiving unit (112). [3] Dishwasher according to claim 2, wherein a first data transmission device (130) associated with the user interface (100) and a second data transmission device (132) for wireless transmission of data (134) are provided. [4] Dishwasher according to one of claims 2 or 3, wherein the user interface (100) comprises a display device for displaying at least one operating parameter of the dishwasher (1), an operating device for operating the dish loading unit (10) and / or the dishwasher (1) and / or a sensor for detecting at least one operating parameter of the dishwasher (1). [5] Dishwasher according to any one of claims 1 to 4, wherein the inner door-penetrating functional unit (102) comprises an addition device (106). [6] Dishwasher according to one of claims 3 to 5, further comprising a lifting device (15) with an electric drive unit (16) which is configured to move the dishware holder (10) between the starting position (A) and the end position (E) by means of a movement of the dishware holder (10), wherein the user interface (100) is arranged in a handle (14) of the dishware holder (10) and comprises a force sensor (114) which is configured to detect a force acting on the handle (14), wherein the first data transmission device (130) is configured to transmit the force detected by the force sensor (114) to the second data transmission device (132), wherein the second data transmission device (132) is associated with a control unit (17) which is configured toto control the electric drive unit (16) for the movement of the dishwashing tray (10) depending on the detected force with a movement property. [7] Dishwasher according to claim 6, further comprising a storage unit (18) associated with the control unit (17), which is configured to store a plurality of different movement properties, wherein the movement property comprises a lifting speed when raising or lowering the dishware intake (10), a height of the starting position (A) and / or a height of the end position (E), and wherein the control unit (17) is configured to select the movement property for controlling the electric drive unit (16) from the plurality of stored movement properties depending on the detected force. [8] Dishwasher according to one of claims 1 to 7, further comprising an energy storage unit (116) arranged on the dish intake (10), which is configured to store the electrical energy transmitted from the transmitting unit (110) to the receiving unit (112) when the door is closed. [9] Dishwasher according to one of claims 3 to 8, further comprising a sensor device for detecting a loading characteristic of the dishwashing compartment (10), wherein the second data transmission device (132) is associated with the sensor device and is configured to transmit the detected loading characteristic to the first data transmission device (130), wherein the user interface (100) is designed as a display device (104) and is configured to output the loading characteristic received from the first data transmission device (130). [10] Dishwasher according to one of claims 3 to 9, wherein the user interface (100) has an input device which is configured to capture user inputs and the first data transmission device (130) is configured to transmit the captured user inputs to the second data transmission device (132). [11] Dishwasher according to one of claims 1 to 10, wherein the transmitting unit (110) has a coupling detection unit (118) which is configured to determine a coupling state of the transmitting unit (110) with the receiving unit (112) and to activate the inductive energy transfer depending on the determined coupling state. [12] Method for operating a dishwasher (1), in particular a household dishwasher, comprising a wash container (2) that can be closed with a door (3) and a dishware holder (10) with a user interface (100) that is movable in the wash container (2), wherein the dishware holder (10) is movable between an initial position (A) and an end position (E), comprising: Inductive transmission of electrical energy from a transmitter unit (110) arranged on an inside of the door (3) to a receiver unit (112) arranged on the front of the dishware holder (10) when the door (3) is in a closed position and the dishware holder (10) is in the initial position (A), wherein the transmitter unit and the receiver unit are directly opposite each other.

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