Dishwasher for use in a means of transport

Abstract

The invention relates to a dishwasher (110) for use in a means of transport (114). The dishwasher comprises: a) at least one cleaning chamber (122) for receiving an item (112) to be cleaned; b) at least one application device (130) for applying the item (112) to be cleaned in the cleaning chamber (122) with at least one cleaning fluid (126); c) at least one washing tank (128) for receiving the at least one cleaning fluid (126), wherein the dishwasher (110) is designed to control a fill level of the washing tank (128) with the cleaning fluid (126) to a variably adjustable target level; d) at least one receiving device (186) for receiving at least one item of spatial information relating to the dishwasher (110); and e) at least one controller (166), wherein the controller (166) is programmed to determine the target level according to the spatial information.

Description

Technical field

[0001] The invention relates to a dishwasher for use in a means of transport, a means of transport, a method for operating a dishwasher, a computer program for use in a dishwasher control system, and the use of the proposed dishwasher in a means of transport. Dishwashers and methods of the aforementioned type can be used, for example, in the field of commercial dishwashing technology. In particular, the invention can be used in commercial single-chamber dishwashers such as automatic dishwashers or pass-through dishwashers. The invention is fundamentally suitable for use in numerous means of transport, especially in on-board restaurants or bistros on trains, in airplanes, in coaches, or in ship galleys.However, other areas of application are also possible in principle. Technical background

[0002] Numerous cleaning devices, also known as cleaning equipment, are known from the prior art for cleaning and / or disinfecting items. The design of these cleaning devices depends heavily on various boundary conditions, such as the type of item to be cleaned, the degree of soiling, the throughput, and similar factors. Examples of such cleaning devices can be found in DE 10 2004 056 052 A1 and DE 10 2007 025 263 A1.

[0003] Cleaning devices of the type mentioned typically have at least one application device for applying at least one cleaning fluid to the items being cleaned. For example, a nozzle system, in particular a washing system with one or more nozzles, may be provided to apply one or more cleaning fluids, such as liquids and / or steam, to the items being cleaned. The application usually takes place in a recirculating system from at least one wash tank, for example, a wash tank that is open to a cleaning chamber or is separated only by a sieve. Additionally, particularly in commercial dishwashers, at least one rinse tank, also referred to as a final rinse tank, may be provided in which the rinse fluid can be prepared independently of the cleaning fluid in the wash tank in order to shorten the cleaning time.Furthermore, at least one control unit is usually provided, which controls one or more functions of the cleaning device, such as one or more pumps, one or more heaters, one or more valves, or even entire groups of functions and their sequence, including entire cleaning programs.

[0004] Dishwashers, in particular, are often not stationary but are used, for example, in the galleys of mobile vessels. In this case, however, the technical challenge arises that, for example, during acceleration, braking maneuvers, cornering, uphill or downhill travel, turbulence, or even swaying due to waves, the cleaning fluid must be prevented from overflowing the wash tank. Mechanical designs for overflow protection or general protection against wave action are well-known, especially in nautical engineering. In particular, similar to anti-roll bars for wave action, raised overflow edges can be incorporated into the tank to prevent the contents from leaking out, even during swaying.

[0005] JP H01-207029A describes a dishwasher in which a front opening of a wash tub is opened and closed by means of a forward-opening door. The dishwasher is equipped with a means for supplying water to the wash tub, various signaling devices, a means for detecting a front water level, and a means for detecting a rear water level, each detecting a specific water level at the front and rear of the wash tub, respectively.

[0006] US 2003 / 0037383A1 describes a device with a display system in conjunction with device leveling. The system includes an accelerometer, which, in conjunction with an electronic control unit, is used to detect the degree to which the device is not level. Signals from the accelerometer are sent to a CPU, which controls a visual display on a screen attached to the device. Adjustments made to change the device's leveling status are also sent to the CPU, updating the display and the transport when the device is at the appropriate height.

[0007] However, such design modifications have disadvantages in practice. For example, raising one or more edges of the wash tank reduces the usable interior height of the dishwasher, given a fixed installation dimension. Furthermore, design modifications generally require a complete change to the machine type, as such changes must be considered very early in the dishwasher's basic construction. It should also be noted that dishwashers for use in vehicles are typically produced in relatively small quantities, meaning that a custom design that alters the basic construction compared to conventional stationary dishwashers would often be uneconomical in practice. Object of the invention

[0008] It would therefore be desirable to provide a dishwasher and a method for operating it that are particularly suitable for use in vehicles and that largely avoid the disadvantages of known dishwashers and methods of the aforementioned type. In particular, effective protection against overflow of the dishwasher's wash tank should be ensured, even during strong accelerations due to, for example, braking or acceleration, during sharp turns or inclines, or during strong fluctuations due to, for example, turbulence or waves. General description of the invention

[0009] This problem is addressed by a dishwasher for use in a means of transport, a means of transport, a method for operating a dishwasher, a computer program for use in a dishwasher control system, and a use of the proposed dishwasher for use in a means of transport, comprising the features of the independent claims. Advantageous embodiments, which can be implemented individually or in any combination, are described in the dependent claims.

[0010] In the following, the terms "have," "exhibit," "comprise," or "include," or any grammatical variations thereof, are used in a non-exclusive manner. Accordingly, these terms can refer both to situations in which, apart from the features introduced by these terms, no other features are present, and to situations in which one or more additional features are present. For example, the expression "A has B," "A exhibits B," "A includes B," or "A includes B" can refer both to the situation in which, apart from B, no other element is present in A (i.e., a situation in which A consists solely of B) and to the situation in which, in addition to B, one or more other elements are present in A, such as element C, elements C and D, or even further elements.

[0011] Furthermore, it should be noted that the terms "at least one" and "one or more," as well as grammatical variations of these terms, when used in connection with one or more elements or features and intended to express that the element or feature may be present once or multiple times, are generally used only once, for example, when the feature or element is first introduced. Upon subsequent mention of the feature or element, the corresponding term "at least one" or "one or more" is generally no longer used, without restricting the possibility that the feature or element may be present once or multiple times.

[0012] Furthermore, the terms "preferably," "in particular," "for example," or similar terms are used in the following text in conjunction with optional features without limiting alternative embodiments. Features introduced by these terms are optional features, and it is not intended that these features limit the scope of protection of the claims, and in particular the independent claims. As the person skilled in the art will recognize, the invention can also be implemented using other embodiments. Similarly, features introduced by "in one embodiment of the invention" or by "in an exemplary embodiment of the invention" are understood as optional features without limiting alternative embodiments or the scope of protection of the independent claims.Furthermore, these introductory expressions are intended to leave all possibilities of combining the features introduced herein with other features, whether optional or non-optional features, unaffected.

[0013] In a first aspect of the present invention, a dishwasher for use in a means of transport is proposed, as well as a means of transport comprising the dishwasher. The term "dishwasher," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, shall be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a cleaning device designed to at least largely remove adhering contaminants from dishes and / or to sanitize and / or disinfect the dishes, in particular by contact with at least one cleaning fluid.The dishes to be cleaned can include, in particular, items designed and intended for serving, preparing, or storing food and / or beverages, for example, items selected from the following groups: plates, cups, bowls, dishes, glasses, pans, pots, trays, cutlery, and catering containers. However, the dishwasher can also be set up or used to clean other types of items, such as personal protective equipment like respirators, face masks, or similar items. Other types of items to be cleaned are also generally possible.As will be explained in more detail below, the dishwasher can be designed in particular as a program-based automatic dishwasher, which is set up to subject the items to be cleaned, which are placed in a cleaning chamber, to at least one cleaning program, wherein in at least one program step of the cleaning program the items to be cleaned are exposed to cleaning fluid, for example cleaning fluid in the form of rinse fluid and / or rinse fluid.

[0014] The term "means of transport," as used here, is a broad term and should be interpreted according to its ordinary and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term may refer in particular to a vehicle, contraption, or mobile means of transport for the carriage of persons and / or goods, designed for use on land, water, or in the air. Accordingly, the means of transport may, in particular, include at least one means of transport selected from the group consisting of: a motor vehicle, in particular a coach; a ship, in particular a passenger ship and / or a merchant ship; an aircraft, in particular a passenger aircraft; a railway or part thereof, in particular a railway carriage and, in particular, a dining car or a carriage with an on-board bistro.However, other areas of application are also possible in principle.

[0015] The dishwasher includes: a) at least one cleaning chamber for receiving items to be cleaned; b) at least one application device for applying at least one cleaning fluid to the items in the cleaning chamber; c) at least one wash tank for receiving the at least one cleaning fluid, wherein the dishwasher is configured to regulate the level of the wash tank's fill with cleaning fluid to a variably adjustable target level; d) at least one receiving device for receiving at least one spatial information about the dishwasher; and e) at least one control unit, wherein the control unit is programmed to determine the target level according to the spatial information.

[0016] The term "items to be cleaned," as used here, is a broad term to which its usual and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without restriction, the term can refer in particular to dishes as defined above. However, it is also fundamentally possible to clean other types of items in a dishwasher.

[0017] The term "cleaning chamber," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a fully or partially enclosed chamber within which the cleaning process of the dishes in the dishwasher can be carried out completely or partially. The dishwasher and / or the cleaning chamber may, in particular, have at least one housing that fully or partially encloses the cleaning chamber. A single cleaning chamber may be provided, or, in principle, several cleaning chambers may be provided, for example, sequentially.In this case, the dishwasher in question is a single-chamber dishwasher with exactly one cleaning chamber. Generally, the cleaning chamber can have at least one opening for loading the items to be cleaned. This could be, for example, an opening with a flap located on the front and / or top of the cleaning chamber. Alternatively, hoods can be used to close the cleaning chamber, for example, in so-called hood-type dishwashers. As yet another alternative, the cleaning chamber can also be designed entirely or partially as a tunnel, for example, in so-called conveyor dishwashers.

[0018] The term "cleaning fluid," as used here, is a broad term and should be understood according to its usual and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to any liquid which, upon contact with the item being cleaned, can have a cleaning effect. Accordingly, the term "cleaning liquid" will also be used in the following text instead of "cleaning fluid," without limiting the use of other fluid media. In particular, the cleaning liquid can be an aqueous liquid, for example, water and / or water with one or more additives, such as one or more cleaning concentrates and / or rinse aids and / or disinfectants.The cleaning device can be configured to use a single cleaning fluid or a combination of several cleaning fluids. If multiple cleaning fluids are used, the items to be cleaned can be treated with the different cleaning fluids simultaneously or sequentially. For example, the items can remain stationary within the cleaning chamber and be treated successively with the different cleaning fluids.

[0019] The term "application device," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to any device by which the item to be cleaned can be exposed to the cleaning fluid, in particular the cleaning liquid, within the cleaning chamber. The application device can, in particular, as explained in more detail below, comprise at least one nozzle system. Furthermore, the application device can comprise at least one pump and at least one piping system for supplying cleaning liquid to the nozzle system.This may include, for example, a nozzle system and a piping system for supplying cleaning fluid from the wash tank, as well as at least one wash pump. Furthermore, at least one nozzle system and at least one piping system for supplying cleaning fluid from the rinse and / or rinse tank, which will be described in more detail below, may be included, as well as at least one rinse pump. Examples are explained in more detail below.

[0020] The term "wash tank," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a storage container designed to hold at least one cleaning fluid. Specifically, it can be a container in direct fluidic connection with the cleaning chamber, for example, by being formed and / or provided at or within the bottom of the cleaning chamber. For instance, the wash tank may be open to the cleaning chamber or merely separated from it, for example, by a sieve or perforated plate.The latter separation methods, such as using a sieve or a perforated plate, are equivalent to the possibility of opening the wash tank to the cleaning chamber. For example, a funnel can be provided in the bottom of the cleaning chamber through which the cleaning fluid can flow into the wash tank. The application device can be configured, for example, to use a circulation pump to apply cleaning fluid from the wash tank to the items being cleaned in a circulating process.

[0021] As described above, the dishwasher is designed to regulate the level of cleaning fluid in the wash tank to a variably adjustable target level. For this purpose, the dishwasher has at least one controller, at least one level sensor for continuously or incrementally detecting the level of cleaning fluid in the wash tank, and at least one control device for influencing the level of cleaning fluid in the wash tank, for example, at least one pump and / or at least one valve. The controller is designed to actuate the control device, for example, by activating the pump and / or the valve, so that, based on at least one level signal transmitted from the level sensor to the controller, cleaning fluid is added to the wash tank when the level falls below a target level and removed from the wash tank when the level exceeds the target level.To refill the cleaning fluid, fresh cleaning fluid, for example, fresh water and / or cleaning fluid from at least one optional expansion tank, can be added to the wash tank by opening at least one valve and / or by activating at least one pump. To remove cleaning fluid from the wash tank, it can be discharged into a drain and / or the optional expansion tank, again for example, by opening at least one valve and / or by activating at least one pump.The at least one controller can be designed entirely or partially as hardware, for example as an electronic controller, and / or entirely or partially as software, for example as software that is installed in and / or can run on at least one processor, for example at least one processor of the dishwasher control system described in more detail below. The controller can therefore also be fully or partially integrated into the dishwasher control system described in more detail below.

[0022] The term "target level," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to the level of the cleaning fluid in the wash tank, i.e., to a fill level of the wash tank that is to be achieved by a corresponding control system. The target level can therefore, in particular, be the setpoint of the control system for the level of the cleaning fluid in the wash tank.

[0023] The term "variably adjustable," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to the fact that the target level can be set to at least two, preferably at least three, four, or more different values, for example, continuously or in steps. For instance, a discrete or continuous range of possible target levels can be specified, with the machine configured to adjust the level of the cleaning fluid in the wash tank to these values.

[0024] The term "receiving device," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a device designed wholly or partly as hardware and / or wholly or partly as software, which is configured to generate at least one piece of spatial information and / or to receive at least one piece of spatial information from another device so that it is available to the controller. The receiving device can also be wholly or partly integrated into the controller.

[0025] The term "spatial information," as used here, is also a broad term, to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to any information describing the location of the dishwasher, its spatial orientation, a change in its location over time, a change in its spatial orientation over time, its acceleration or deceleration, its angular acceleration, or a combination thereof. The information can be provided in digital or analog form.In particular, the information can be transmitted to the receiving device, for example via at least one sensor integrated into the dishwasher, at least one external sensor or at least one external information transmitter, as will be described in more detail below.

[0026] As described above, the dishwasher also includes at least one control unit, which is programmed to determine the target level based on spatial information. This can mean, in particular, that the control unit is configured to set the target level, which is generally freely selectable within a possible range of values, to a specific value based on the spatial information.

[0027] The term "control system," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a single-part or multi-part device of the dishwasher, which is designed to fully or partially control and / or regulate the operation of the dishwasher. In particular, the control system can be designed to change, in particular to control and / or regulate, one or more operating parameters of the dishwasher, for example, at least one temperature, at least one pressure, at least one pump output, at least one valve position, at least one heating output, or a combination of two or more of the aforementioned operating parameters.The control system can, in particular, comprise at least one data processing device, for example, at least one processor. The control system can, in particular, be configured programmatically, for example, to control or execute at least one cleaning program of the dishwasher. Accordingly, the control system can be implemented partly by hardware and / or, alternatively or additionally, completely or partially by software. Furthermore, the control system can comprise at least one volatile and / or non-volatile data storage device. The control system can also comprise at least one interface, for example, a human-machine interface for inputting commands and / or outputting information, and / or a wireless or wired interface for the unidirectional or bidirectional exchange of data and / or commands between the dishwasher and at least one other device.The control system can, in particular, include at least one computer and / or at least one processor. The control system can, in particular, be a centralized or decentralized machine control system for the dishwasher.

[0028] The term "programmatically configured," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a feature or configuration of the control system in which the control system is configured by a software program permanently implemented in the control system and / or by a software program stored in a volatile or non-volatile data storage device connected to the control system in order to carry out certain process steps.

[0029] The control system is programmed to determine the target level based on spatial information. This can mean, in particular, that the control system is configured to select a specific target level from the range of possible values, which is then used in process step c) to regulate the level of the cleaning fluid in the wash tank. The selection is made based on the spatial information, i.e., taking the spatial information into account. This can be achieved, for example, by programming the control system to incorporate at least one piece of spatial information as an input variable, or as one of several input variables, into a determination process, such as a determination algorithm, which determines the applicable target level.For example, the control system can be programmed to compare at least one piece of spatial information with a plurality of predefined spatial information values ​​or with value ranges for spatial information, and to select the target level based on this comparison. For instance, the control system, for example in at least one database and / or in at least one list, can provide individual values ​​or value ranges for the spatial information, and the control system is configured to compare whether the spatial information matches one of the individual values, for example also within predefined tolerances, and / or whether the spatial information falls within one or more of the predefined value ranges.For example, the control system can store corresponding target levels for individual values ​​and / or value ranges, allowing the target level to be selected based on a comparison. Alternatively or additionally, the control system can also include at least one algorithm designed to convert spatial information into a corresponding target level. This algorithm can, for example, be a self-learning algorithm. For instance, particularly with vehicles that frequently travel the same routes, such as trains, coaches, ships, or airplanes, a self-learning algorithm—for example, one using at least one neural network—can be employed to assign a target level to the spatial information. The algorithm can learn, for example, during various test runs.In general, the control system can therefore be set up, for example, to determine the target level according to the spatial information using at least one self-learning algorithm, in particular using at least one artificial intelligence and / or at least one neural network.

[0030] The control system can, for example, transmit the selected setpoint level directly or indirectly to the controller in the form of an electronic signal, such as a digital value and / or an analog electrical signal. As mentioned above, the controller can also be fully or partially integrated into the control system.

[0031] As explained above, the wash tank can be open, particularly towards the cleaning chamber, to allow liquid exchange between the wash tank and the cleaning chamber. Specifically, the wash tank can be located in the base of the cleaning chamber and can be connected to the cleaning chamber, for example, via a funnel. A raised wall of the wash tank, for example, in the form of an upwardly projecting edge, is not required, so the dishwasher can be designed without such a raised edge. The wash tank can, for example, have at least one heating device, such as at least one heating coil.

[0032] The application device may, for example, have at least one nozzle system. The term "nozzle system," as used here, is a broad term and should be understood to have its usual and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a device or a combination of devices which has one or more nozzles. A nozzle can be understood, in particular, as an opening or a device with at least one opening from which the cleaning fluid can emerge. For example, the nozzle system may comprise at least one nozzle arm, which may, for instance, be rotatably mounted.For example, the application device can have at least one washing nozzle system for applying cleaning fluid from the washing tank to the items to be cleaned. Furthermore, the application device can optionally have at least one rinsing nozzle system, also referred to as a clear rinse nozzle system, for applying cleaning fluid from an optional rinsing tank, also referred to as a clear rinse tank, to the items to be cleaned. The washing nozzle system and the optional rinsing nozzle system can each, for example, comprise at least one, preferably at least two, nozzle arms, for example, at least one nozzle arm above the items to be cleaned and at least one nozzle arm below the items to be cleaned. The items to be cleaned can, for example, be held in at least one cleaning basket in the cleaning chamber, so that the nozzle arms can be arranged, for example, above and below the cleaning basket, for example, rotatably.

[0033] In general, the nozzle system can therefore, for example, comprise at least one washing nozzle system, in particular with at least one nozzle arm, especially with at least one nozzle arm above the item being cleaned and at least one nozzle arm below the item being cleaned. The application device can further comprise at least one circulation pump and at least one washing line system, wherein, for example, the item being cleaned can be supplied with cleaning fluid from the washing tank via the washing line system and the circulation pump in a circulating operation. For this purpose, for example, the washing nozzle system described above can be used, which is preferably designed separately from an optional rinsing nozzle system.

[0034] The optional rinse tank or rinsing tank can be designed, in particular, wholly or partially as a boiler. The boiler can be designed, in particular, wholly or partially as a sealed tank, in which at least one second heating device can optionally be arranged.

[0035] The application device can, in particular, as described above, comprise at least one rinse nozzle system, especially with at least one nozzle arm, and in particular with at least one nozzle arm above the item being cleaned and at least one nozzle arm below the item being cleaned. The rinse nozzle system can, in particular, be designed separately from the washing nozzle system. The application device can further comprise at least one rinse pump and at least one rinse line system, wherein the item being cleaned can be supplied with cleaning fluid from the rinse tank via the rinse line system and the rinse pump.

[0036] The application device may, in particular, include at least one circulation pump. Accordingly, as explained above, the application device may, in particular, be configured to apply cleaning fluid from the wash tank to the items to be cleaned in the cleaning chamber in a circulating process.

[0037] The spatial information can generally include at least one piece of information that can affect the position and / or orientation of a liquid level in the washing tank. In particular, the spatial information can include at least one piece of information selected from the group consisting of: location information about the dishwasher's position; position information about the dishwasher's spatial orientation; motion information about the dishwasher's movement; acceleration information about the dishwasher's acceleration; topographic information about the topography of the dishwasher's location; and change information about an expected change from the group consisting of location information, position information, motion information, acceleration information, and topographic information.The at least one piece of information can include, in particular, information about how the dishwasher's position, orientation, speed, or acceleration will change within a given time period in the future, for example, a period of 5 seconds to 2 minutes. This change information can be derived, for example, from a known route of the vehicle, such as in the case of rail vehicles or coaches, from the initiation of a braking or acceleration process, from information about turbulence, from information about waves, from information about an upcoming change of direction, from information about an upcoming change in altitude, from information about the vehicle's inclination, or from a combination of two or more of the aforementioned possibilities.

[0038] As explained above, the control system can be configured, particularly through software, to convert the spatial information into the target level using at least one conversion method. The conversion method can be selected from the following: applying a mapping algorithm, where the corresponding target level is assigned to the spatial information using the mapping algorithm; looking up values ​​in an electronic table, in which corresponding target level values ​​are assigned to each piece of spatial information; or using a self-learning algorithm. Further possibilities have already been described above.

[0039] Possible further configurations concern the receiving device. As previously explained, the receiving device can generally have at least one electronic interface for receiving the spatial information. This at least one electronic interface can, in particular, have at least one wired interface, for example, at least one LAN interface. Alternatively or additionally, the at least one electronic interface can also have at least one wireless interface, in particular at least one WLAN interface.

[0040] The receiving device can be configured to receive the at least one piece of spatial information, in whole or in part, from at least one device and / or at least one information transmitter outside the dishwasher, for example, a computer, a computer network, an external transmitter, or even, for example, a central control unit of the vehicle. Alternatively or additionally, the dishwasher and / or the receiving device can also be configured, in whole or in part, to generate the at least one piece of spatial information independently, in whole or in part. For example, the receiving device can include at least one sensor for detecting the spatial information, whereby the at least one piece of spatial information can be generated or detected, in whole or in part, by the at least one sensor.The at least one sensor can be located, for example, inside or outside the dishwasher housing. The at least one sensor can be selected from the following group: a GPS sensor; an inclination sensor; an accelerometer; a pressure sensor; a triangulation sensor. The at least one piece of spatial information can be derived, for example, directly or indirectly from sensor data of the at least one sensor. For example, sensor data from a GPS sensor can be used by the control system to compare it with a map and, for example, to derive information about upcoming changes in direction, accelerations, or decelerations, or other information related to a road or route network, which can directly or indirectly affect the orientation of the cleaning fluid level in the wash tank.For example, location information can be compared with a map to provide information about whether an entry into a train station with a corresponding braking maneuver is imminent, whether a curve is approaching, whether an uphill or downhill journey is imminent, whether a take-off or landing is imminent, whether a traffic jam with a corresponding forced braking maneuver is imminent, or a combination of two or more of these pieces of information.

[0041] In general, the control system can, for example, include at least one digitized map with multiple possible locations where the dishwasher could be situated. This could be, for instance, a route network map, a road map, or any map whatsoever, such as a topographic map. The digitized map can, for example, contain at least one target level for each of the possible locations. This data can be entered continuously or discontinuously, for example, by dividing the map or specific areas of it, such as drivable routes and / or roads, into sections or areas, with target levels assigned to each of these areas.The target level can also depend on at least one additional parameter, in particular a speed, such as an absolute speed or a directional speed. For example, the directional speed can indicate when a specific change will occur, such as when a particular curve will be encountered in the future, an ascent or descent, a braking or acceleration process, or another type of change. The digitized map can be stored in a control system database. Alternatively, the digitized map can be stored in a simpler form, such as a table, especially an electronic table, where, for example, a target level is assigned to a location.

[0042] As explained above, the level change from the target level in the wash tank can be achieved in various ways. As further explained above, the dishwasher can, in particular, have at least one equalization tank. The term "equalization tank," as used here, is a broad term and should be understood to have its ordinary and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer, in particular, to a container, preferably one enclosed on all sides by a container wall, which is designed to receive cleaning fluid from the wash tank and / or to discharge cleaning fluid into the wash tank. The equalization tank can, in particular, be connected to the wash tank via at least one equalization line.Furthermore, at least one balancing valve can be connected to the balancing line, and / or at least one balancing pump can be provided, whereby the balancing valve and / or the balancing pump enable and / or facilitate the transfer of cleaning fluid from the wash tank to the balancing tank or vice versa. The balancing pump and / or the balancing valve can be controlled, for example, by the control unit and / or the optional control system. The control unit can be configured to transfer a portion of the cleaning fluid from the wash tank to the balancing tank when the setpoint level drops, and / or the control unit can be configured to transfer a portion of the cleaning fluid from the balancing tank to the wash tank when the setpoint level rises.As also mentioned, the expansion tank can optionally be combined with other types of level change, such as an outlet into a drain and / or an inlet of fresh cleaning fluid, for example, fresh water. The expansion tank can be thermally insulated. Alternatively or additionally, the expansion tank can also be equipped with, for example, at least one heating device to allow for temperature control of the cleaning fluid within the tank. The expansion tank can, in particular, have at least one level sensor to detect the level within the tank, specifically to detect the fill level of the cleaning fluid.

[0043] The expansion tank can, for example, have a volume that is at most equal to the volume of the wash tank. Alternatively, the expansion tank can have a volume that is between 10% and 90% of the volume of the wash tank. The expansion tank can be designed to be separate from the cleaning chamber, but can be fluidically connected to it, for example, via the aforementioned at least one expansion line. The expansion tank can be connected to the wash tank via at least one pump, which can also be referred to as an expansion pump, and the control system can be configured, for example, to control the pump.

[0044] The dishwasher also has at least one level sensor to detect the fill level of the wash tank with cleaning fluid. This can be, for example, a continuous, discontinuous, or discrete level sensor. The level is then detected either continuously or in steps. If step detection is used, the detection can occur in at least two, and in particular at least three, four, or even five steps.

[0045] The control system can be configured to allow stepless adjustment of the target level. However, adjustment in multiple steps is also possible. For example, specific discrete target levels can be defined for certain ranges of expected inclines, accelerations, or vibrations and fluctuations.

[0046] As explained above, the dishwasher can be designed specifically for commercial use. Accordingly, the dishwasher can, for example, in addition to the wash tank and optionally also in addition to the expansion tank, have at least one rinse tank for preparing at least one rinse aid solution. This rinse tank is designed separately from the wash tank and optionally also separate from the at least one expansion tank. The rinse tank is also referred to as the final rinse tank, and the rinse aid solution is also referred to as the final rinse solution. For example, the rinse tank can have at least one heating device. In particular, the rinse tank can be designed as a boiler. A design, for example, as an instantaneous water heater or in conjunction with an instantaneous water heater, is also possible.

[0047] The dishwasher can be designed, in particular, as a program-controlled automatic dishwasher. The control system can be programmed accordingly to execute at least one cleaning program, wherein the cleaning program includes at least one wash cycle in which the items to be cleaned are exposed to the cleaning fluid from the wash tank, particularly in recirculation mode. The control system can be configured to change the target level in the wash tank during the wash cycle according to spatial information.

[0048] The receiving device can be configured, in particular, to receive at least one type of information about the type of vehicle. The term "type of information," as used here, is a broad term and should be understood in its ordinary and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer, in particular, to any type of information that includes details about the type or configuration of the vehicle in which the dishwasher is used. The control system can be configured, in particular, to take the type of information into account when determining the target level. For example, the type of information can include at least one piece of information about how the vehicle itself reacts to certain spatial situations and / or changes in the spatial situation.Accordingly, the train type information, for example, can include information about whether the train is equipped with tilting technology or not. Such information can be used, for instance, to determine the target level, since the target level for trains with tilting technology is typically higher, even on curves, than for trains without tilting technology. Furthermore, the train type information can also include information about the location of the on-board bistro, dining car, or dishwasher within the train. Such information can, for example, lead to a more precise timing of certain changes in the dishwasher's location, since train compartments located further towards the rear of the train reach certain curves later than those located further forward.For trains and other modes of transport, type information can also provide information about the behavior of the vehicle in certain anticipated situations, such as the behavior of an aircraft in expected turbulence or during takeoffs, landings, or turns. For example, larger commercial aircraft typically behave more stably and smoothly in turbulence than smaller commercial aircraft, so a target level can be set higher for the former than for the latter.

[0049] The receiving device may further be configured to receive at least one control signal from the vehicle. The term "control signal," as used here, is a broad term and should be understood to have its ordinary and common meaning as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term may refer in particular to an electrical signal configured to supply control information to a controllable device. For example, this control information may specify how to set certain operating parameters of the controllable device. In the present case, the control signal may, for example, be a signal from an on-board computer of the vehicle.The dishwasher's control system can be specifically configured to take the control signal into account when determining the target water level. For example, an on-board computer of the vehicle itself can influence the target water level.

[0050] In particular, the control signal can include at least one control signal for the means of transport itself. This can especially include the control signal being used in at least one dual function within the means of transport, namely, on the one hand, to control at least one function of the means of transport itself, and on the other hand, to control the dishwasher, and there, in particular, to influence the target level. The control signal can thus be selected, in particular, from the group consisting of: a control signal for accelerating the means of transport; a control signal for braking the means of transport; a control signal for changing the position of the means of transport.Thus, for example, a braking signal initiating a braking maneuver of the vehicle can also be transmitted to the dishwasher's control system. There, it can be adjusted, for instance, by lowering the target level to prevent the wash tank from overflowing during the upcoming braking process. Alternatively or additionally, acceleration signals, steering signals, signals indicating ascent or descent, signals for impending turbulence, signals from a pilot to the crew or passengers, or similar signals can also lead to a lowering of the target level.

[0051] In a further aspect of the present invention, a method for operating the dishwasher according to the invention in one or more of the proposed embodiments is proposed, for example, according to one or more of the embodiments described above and / or according to one or more of the embodiments described in more detail below. The method comprises the steps described in more detail below. The steps can be carried out in the sequence mentioned, in particular; however, a different sequence, an overlapping execution of the method steps, or a repeated execution of one or more method steps is also possible in principle. The method comprises the following steps: i) Receiving at least one spatial piece of information about the dishwasher by means of the receiving device; ii) Determining the target level according to the spatial information by means of the control; and iii) Regulating the level of filling the wash tank with the cleaning fluid to the target level corresponding to the spatial information.

[0052] Regarding possible configurations of the individual process steps, reference can be made to the above description of the dishwasher.

[0053] The method can be fully or partially computer-implemented. Thus, for example, the present invention also proposes a computer program which, when executed on a computer or computer network, particularly on the controller, fully or partially executes the method according to the invention in one of its embodiments, for example, process step ii) and optionally also one or more of process steps i) and iii), the latter being, for example, fully or partially implemented in software by the computer program. The computer program can, in particular, comprise program code, which can be stored, in particular, on at least one computer-readable data carrier.Furthermore, a data carrier is proposed on which a data structure is stored which, after being loaded into the working and / or main memory of a computer or computer network, can fully or partially execute the method according to the invention in one of its embodiments, for example, method step ii) and optionally also one or more of the method steps i) and iii), the latter of which can, for example, be fully or partially implemented in software.The present invention also proposes a computer program product comprising program code stored on a machine-readable medium for carrying out the inventive method in one of its embodiments, either completely or partially, when the program is executed on a computer or computer network. This includes, for example, process step ii) and optionally one or more of process steps i) and iii), the latter of which can be carried out, for example, completely or partially by software implementation. A computer program product is understood to be the program as a marketable product. It can, in principle, be in any form, such as on paper or a computer-readable data carrier, and can, in particular, be distributed via a data transmission network.Finally, a modulated data signal is proposed which contains instructions executable by a computer system or computer network for the complete or partial execution of the method according to the invention, for example, method step ii) and optionally also one or more of the method steps i) and iii), the latter of which can, for example, be carried out completely or partially by software implementation.

[0054] The computer program can be specifically configured for use in the control of the dishwasher proposed according to the invention, for example in one or more of the proposed embodiments. The computer program can, in particular, include commands that cause the control system to determine the target level according to the spatial information. Thus, the computer program can, in particular, be configured to carry out process step ii) and, optionally, one or more of process steps i) and iii) by computer implementation.

[0055] In a further aspect of the present invention, the dishwasher proposed according to the invention, for example in one or more of the embodiments described above and / or in one or more of the embodiments described in more detail below, is proposed for use in a means of transport, in particular a means of transport selected from the group consisting of: a railway train, in particular a dining car of a railway train; a coach; a ship; an airplane; a mobile field kitchen. The means of transport can, for example, be in motion during the operation of the dishwasher, but can also, for example, be stationary, for example in a parking situation in which the means of transport is upright or tilted.

[0056] The proposed dishwasher, the proposed method, the proposed computer program, and the proposed use offer numerous advantages over known devices and methods of the aforementioned type. In particular, the invention addresses the aforementioned technical challenges. For example, an unwanted overflow of a wash tank can be prevented by adaptively controlling the level of the wash tank in a dishwasher in a vehicle, such as in traffic situations where the vehicle, and thus also the dishwasher, is subject to strong tilting, acceleration, deceleration, or fluctuations and vibrations.Such situations, in which the wash tank would overflow on one or more sides without protective measures, for example due to a slope of the liquid level relative to a plane of the dishwasher or due to fluctuations of the liquid level relative to the plane of the dishwasher, can be mitigated by adjusting a target level, for example by lowering the target level in a timely manner.

[0057] The invention can be used in particular in dishwashers in the form of automatic cleaning machines, especially commercial dishwashers for dishes, glasses, kitchen utensils, or similar items. As explained above, however, other types of items can also be cleaned in the dishwasher, for example, parts of personal protective equipment such as respirators. In particular, the dishwasher can be a dual-circuit system, in which, in addition to the wash tank, at least one rinse tank is provided. Furthermore, the dishwasher can be, in particular, a dishwasher with a stationary washing process, i.e., a dishwasher in which the items remain stationary in the cleaning chamber during the washing process.In particular, it can be a program-controlled automatic dishwasher in which the items to be cleaned are stationary in the cleaning chamber during the cleaning process, in which a dual-circuit system is provided, and in which the control system is configured to execute at least one cleaning program. However, the dishwasher could also be designed as a transport dishwasher. Generally, the present invention can be used in dishwashers for mobile applications, during the movement of the vehicle. Examples include use in dining cars of railway trains, in coaches, on ships, or in airplanes.

[0058] The dishwasher according to the invention preferably requires no significant structural modifications compared to conventional dishwashers, since essentially only an adjustment of the control system is necessary. In particular, structural raising of the wash tank's rim can be avoided, so that the proposed dishwasher can be manufactured cost-effectively and, at the same time, no structural measures are required that would increase the dishwasher's overall height or reduce the usable space of the cleaning chamber. In principle, adapting standard dishwashers not intended for use in vehicles is straightforward and cost-effective. Brief description of the characters

[0059] Further details and features will become apparent from the following description of exemplary embodiments, particularly in conjunction with the dependent claims. The respective features can be implemented individually or in combination with one another. The invention is not limited to the exemplary embodiments. The exemplary embodiments are shown schematically in the figures. Identical reference numerals in the individual figures denote identical or functionally equivalent elements, or elements that correspond to one another with respect to their functions.

[0060] Specifically, we show: Figure 1 shows an embodiment of a dishwasher in a sectional view from the side; and Figure 2 shows an embodiment of a means of transport in the form of a train. Description of the exemplary implementations

[0061] In Figure 1Figure 110 shows an embodiment of a dishwasher 110 according to the invention in a sectional side view. The dishwasher 110 is used for cleaning items 112, for example, in the form of dishes. The dishwasher 110 is intended for use in a means of transport 114, which is shown schematically as an example. Figure 2 It is depicted as train 116 or, more specifically, as dining car 118 or the on-board bistro of train 116. Both figures are explained together below.

[0062] In the illustrated embodiment, the dishwasher 110 comprises a cleaning chamber 122 enclosed by at least one housing 120. The items to be cleaned 112 can be placed in this cleaning chamber 122, for example, by means of one or more holders 124, such as one or more dish racks, and in particular in a stationary position. The items to be cleaned 112 can be exposed to at least one cleaning fluid 126 from at least one wash tank 128 in the cleaning chamber 122. For the purpose of this exposure, the dishwasher 110 includes, for example, an exposure device 130. This exposure device 130 can, for example, comprise a wash line 132, which is connected to the wash tank 128 and in which, for example, a circulation pump 134 is provided.Furthermore, the application device 130 includes, for example, nozzle arms 136 above and below the item to be cleaned 112, which can also be referred to as washing nozzle arms. These nozzle arms 136, which can be rotatably mounted, allow the item to be cleaned 112 to be exposed to the cleaning fluid 126 from the washing tank 128, for example, in a circulating operation. After application and / or at the end of an operating period, the cleaning fluid 126 can be discharged into a drain 142, for example, via at least one drain line 138 and optionally at least one drain pump 140. For temperature control of the cleaning fluid 126, at least one heating device 144, also referred to as a washing tank heater, can be provided in the washing tank 128.

[0063] The dishwasher 110 can include one or more application devices. For example, in addition to the application device 130 described above, which can also be referred to as the washing system, the dishwasher 110 can have at least one rinse system 146, which can also be referred to as the final rinse system. The rinse system 146 can, for example, have at least one rinse tank 148, which can also, for example, have at least one heating device 150 and which can, for example, be designed as a boiler. Furthermore, the rinse system 146 can have at least one rinse line 152 through which cleaning fluid in the form of rinse fluid can be conveyed to rinse nozzle arms 156 by means of at least one rinse pump 154. These can, for example, be designed separately from the nozzle arms 136 of the washing system and can, for example, be arranged above and below the items being cleaned 112.The rinse tank 148 can, for example, be filled with fresh water and / or another type of cleaning fluid via at least one fresh water line 158, optionally with at least one valve 160.

[0064] The dishwasher 110 can, for example, be configured as a program-controlled automatic dishwasher 162. The cleaning chamber 122 can be loaded with the items to be cleaned 112 via at least one door 164, such as a front flap. A cleaning program, selectable from a list, can then be started, and its execution is controlled, for example, by a control unit 166 of the dishwasher. In general, whether configured as a program-controlled automatic dishwasher 162 or in another configuration, the control unit 166 can be set to adjust operating parameters of the dishwasher 110, to act on functional elements such as the pumps 134, 140, or 154, or to control valves such as the valve 160.In a program sequence, for example, a cleaning program with preferably at least two program steps can be carried out, for example, first a washing step in which the item to be cleaned 112 is exposed to cleaning fluid 126 in the form of washing fluid, and then, for example, at least one rinsing step in which the item to be cleaned 112 is exposed to rinse fluid from the rinse tank 148. While the washing step can, for example, be carried out in recirculation mode, the rinsing step can, for example, be carried out as a single application. Subsequently, for example, at least one drying step can be carried out.

[0065] As in Figure 1As can be seen, the wash tank 128 is located, for example, at the bottom of the cleaning chamber 122. The wash tank 128 can, for example, occupy the entire floor area of ​​the cleaning chamber 122, or only a portion of this floor, such as a funnel-shaped depression in the floor of the cleaning chamber 122. Generally, however, in most cases the wash tank 128 is open towards the cleaning chamber 122, so that cleaning fluid 126 can flow directly or indirectly from the item being cleaned 112 into the wash tank 128. When used in the means of transport 114, for example according to Figure 2However, a frequent difficulty arises here that the dishwasher 110 is tilted significantly relative to the horizontal in various traffic situations and / or that the cleaning fluid 126 in the wash tank 128 is subjected to strong accelerations, and thus a liquid level 168 of the cleaning fluid 126 generally occurs relative to a plane of the dishwasher 110, for example, one in Figure 1The base plane, designated by reference numeral 170, can be inclined. For example, this could be a plane on which the dishwasher 110 is placed and to which the liquid level 168 is aligned parallel in a non-inclined rest state of the dishwasher 110 and / or the means of transport 114. However, due to this change in the inclination of the liquid level 168 of the cleaning fluid 126 relative to the base plane 170, the liquid level 168 can rise above a tank limit at certain points, for example, during particularly sharp turns, particularly strong accelerations, braking maneuvers, ascents or descents, or also during oscillations of the dishwasher 110, such as in heavy seas.

[0066] To generally avoid this problem, the dishwasher 110 is designed to allow for variable level control of the cleaning fluid 126 in the wash tank 128. Specifically, for this purpose, the dishwasher 110 can, for example, have at least one level sensor 172, which detects the current level of the cleaning fluid 126 in the wash tank 128 and transmits at least one sensor signal about the level to the controller 166, for example, via a sensor line (not shown) or wirelessly. The fill level can then be lowered, for example, by draining cleaning fluid 126 into the drain 142 via the drain pump 140. Alternatively or additionally, at least one expansion tank 174 can be provided, which can be connected to the wash tank 128 via at least one expansion line 176 and optionally via at least one expansion pump 178 and / or at least one valve.For the purpose of lowering the level in the wash tank 128, the balancing pump 178 and / or the drain pump 140 can be controlled, for example, by means of the control unit 166 and / or by means of a regulator 180 that is wholly or partially identical to the control unit 166 or separate from it, such that cleaning fluid 126 is transferred from the wash tank 128 into the balancing tank 174 and / or into the drain 142. Conversely, for the purpose of raising the level in the wash tank 128, the balancing pump 178 can be controlled, for example, by means of the control unit 166 and / or the regulator 180, such that cleaning fluid is transferred from the balancing tank 174 into the wash tank 128.Alternatively or additionally, a valve 182 of a supply line 184, for example a hot water supply, can be controlled, so that the wash tank 128 can also be supplied with a different cleaning fluid than the cleaning fluid from the equalization tank 174, thus raising the level. The change in the level of the cleaning fluid 126 in the wash tank 128 can be controlled or regulated, in particular by means of the controller 180.

[0067] The dishwasher 110 is specifically designed to regulate the fill level of the wash tank 128 with the cleaning fluid 126 to a variably adjustable target level. As described above, this regulation can be achieved in particular by means of the controller 180, which can be implemented entirely or partially in software or entirely or partially in hardware. The controller 180 can be designed entirely or partially separately from the control unit 166 or can also be fully or partially integrated into the control unit 166.

[0068] The dishwasher 110 further comprises at least one receiving device 186 for receiving at least one piece of spatial information about the dishwasher 110 and optionally the means of transport 114. This receiving device 186 can be a single unit or, as shown in Figure 1The receiving device 186 can also be designed in multiple parts. Furthermore, the receiving device 186 can be completely or partially separate from the control unit 166 or can be completely or partially integrated into the control unit 166. The spatial information can, for example, include at least information about how the dishwasher 110 is currently or in a future time interval tilted, accelerated, subject to fluctuations, or where the dishwasher 110 is currently located and / or where the dishwasher 110 will be located in a future time interval. The receiving device 186 can, for example, have at least one interface 188 for receiving the spatial information, such as a LAN or WLAN interface. Alternatively or additionally, the receiving device 186 can also, for example, include at least one sensor 190 for detecting the at least one piece of spatial information.For example, the sensor 190 can have at least one tilt sensor 192 and / or at least one acceleration sensor 194, for example, to detect at least one current spatial orientation of the dishwasher 110 and / or at least one current acceleration of the dishwasher 110. These can constitute the spatial information or can also be incorporated into the spatial information as a component. Alternatively or additionally, the receiving device 186, in particular the sensor 190, can also have, for example, at least one GPS sensor 196, also referred to as a GPS receiver, for example, to obtain or generate information about the location of the dishwasher 110 and / or the means of transport 114, topographic information, or information about the speed of the dishwasher 110 and / or the means of transport 114.This information can also, alternatively or additionally, form the spatial information or be incorporated as a component into the spatial information.

[0069] The controller 166 can, for example, comprise at least one data processing device, such as at least one processor, and / or at least one integrated circuit, such as at least one application-specific integrated circuit (ASIC). The controller 166 is programmed to select the target level in the washing tank 128 according to the spatial information. For example, the controller 166 can contain an algorithm that calculates or selects the target level taking the spatial information into account. For example, one or more lists can be used for this purpose. For example, specific levels can be assigned to certain inclinations of the dishwasher 110. For example, a maximum target level can be set for a horizontal orientation of the dishwasher 110, for example, with a tolerance of ±5° or another tolerance range.If, however, it is determined that the dishwasher 110 deviates from a horizontal orientation by an angle of 5-10°, a second-highest target level can be set, for example. If it is determined that the dishwasher 110 is oriented at an angle of 10-15° to the horizontal, a third-highest target level can be set. This scheme can be varied as desired. Analogous schemes can also be set for acceleration values, for example.

[0070] The location of the means of transport 114 and / or the dishwasher 110 and / or their speed can also be incorporated into the selection of the target level via spatial information. This will be demonstrated using the example of the Figure 2explained. For example, spatial information can include information about the location of the means of transport 114 and / or the dishwasher 110 and / or its speed in various ways. For example, the GPS sensor 196 can communicate with one or more satellites 198 and thereby receive coordinates and / or the speed of the means of transport 114 and / or the dishwasher 110. Alternatively or additionally, communication can also take place with at least one network sensor of a railway line 200, or location information can be obtained from a central control unit of the means of transport 114, for example via the interface 188.

[0071] This location information can be used in various ways to influence the target level. For example, the control unit 166, which may also include at least one data storage unit 206, can contain at least one digital map, such as a route network map. This could be a topographic map, for example. This digital map may already contain target values ​​for specific areas. For example, in Figure 1It is apparent that an ascent 202 is imminent at location x 1, which can be identified using the digital map. Therefore, the target level can be lowered there so that when the ascent 202 is actually reached at location x 2, the target level is already within the correct range. At location x 3, for example, it can be seen that a descent 204 is imminent, so the target level can again be lowered. At location x 4, for example, it can be seen that a curve 208 is imminent, so the target level can also be lowered here, so that at location x 5, where the curve 208 is located, the level is already lowered. At location x 6, for example, it can be seen that an entry into a station 210 is imminent, and thus a braking maneuver will occur, so the target level can also be lowered here.Between these special events, the target level can, for example, be temporarily raised back to a normal value.

[0072] Optionally, the control unit 166 can also be configured to receive at least one control command from the vehicle 114. For example, at least one control command for a change of direction, an ascent, a descent, or even an acceleration or braking process can be transmitted to the control unit 166, so that this information can also be included in the determination of the target level.

[0073] In general, the controller 166 can also, for example, have at least one self-learning algorithm, which can be trained accordingly. This algorithm can, for example, independently or at least partially independently create a plan for target levels based on the spatial information received, for example, using the level sensor 172 and / or other sensors that detect, for example, an unintentional overflow of the wash tank 128. This plan can include discrete or continuous values ​​for target levels. In general, the level control of the wash tank 128 can be continuous or in stages.

[0074] In summary, taking into account at least one piece of spatial information, an overflow of the washing tank 128 due to traffic-related inclinations and / or fluctuations of the dishwasher 110 can be effectively avoided or at least reduced. This reduction can, in particular, occur completely automatically and without any human intervention. Reference symbol list

[0075] 110 Dishwasher 112 Item to be cleaned 114 Means of transport 116 Train 118 Dining car 120 Housing 122 Cleaning chamber 124 Bracket 126 Cleaning fluid 128 Wash tank 130 Spray device 132 Wash line 134 Circulation pump 136 Nozzle arms 138 Drain line 140 Drain pump 142 Drain 144 Heating device 146 Rinse system 148 Rinse tank 150 Heating device 152 Rinse line 154 Rinse pump 156 Rinse nozzle arms 158 Fresh water line 160 Valve 162 Program selector 164 Door 166 Control 168 Liquid level 170 Base level 172 Level sensor 174 Expansion tank 176 Expansion line 178 Expansion pump 180 Regulator 182 Valve 184 Inlet line 186 Receiver 188 Interface 190 Sensor 192 Inclination sensor 194 Accelerometer 196 GPS sensor 198 Satellite 200 Railway line 202 Ascent 204 Descent 206 Data storage 208 Curve 210 Station

Claims

1. Dishwasher (110) for use in a means of transport (114), comprising: a) at least one cleaning chamber (122) for receiving items to be cleaned (112); b) at least one application device (130) for applying at least one cleaning fluid (126) to the items to be cleaned (112) in the cleaning chamber (122); c) at least one washing tank (128) for receiving the at least one cleaning fluid (126), the dishwasher (110) being designed to control a filling level of the washing tank (128) with the cleaning fluid (126) to a target level; f) at least one level sensor (172) for sensing the level of the cleaning fluid (126) in the washing tank (128) steplessly or in steps; g) at least one control device for influencing the level of the cleaning fluid (126) in the washing tank (128) ; h) at least one regulator, which is designed to control the control device in order to, in accordance with at least one filling-level signal transmitted by the level sensor to the regulator, replenish the washing tank (128) with cleaning fluid (126) if it falls below the target level and let out cleaning fluid (126) from the washing tank (128) if it goes above the target level, characterized in that the dishwasher is designed to control the filling level of the washing tank (128) with the cleaning fluid (126) to a variably adjustable target level; and in that the dishwasher also comprises: d) at least one receiving device (186) for receiving at least one item of spatial information concerning the dishwasher (110); and e) at least one controller (166), the controller (166) being programmed to determine the target level in accordance with the spatial information.

2. Dishwasher (110) according to the preceding claim, wherein the spatial information has at least one item of information selected from the group consisting of: an item of location information concerning a location of the dishwasher (110); an item of position information concerning a spatial alignment of the dishwasher (110); an item of movement information concerning a movement of the dishwasher (110); an item of acceleration information concerning an acceleration of the dishwasher (110); an item of topographical information concerning a topography of the location of the dishwasher (110); an item of change information concerning a change to be expected of at least one item of information selected from the group consisting of the item of location information, the item of position information, the item of movement information, the item of acceleration information and the item of topographical information.

3. Dishwasher (110) according to one of the preceding claims, wherein the controller (166) is programmed to convert the spatial information into the target level by means of at least one conversion process, selected from the group consisting of: application of an assignment algorithm, the spatial information being assigned the corresponding target level by means of the assignment algorithm; referral to an electronic table, in which items of spatial information are respectively assigned corresponding target-level values; a self-learning algorithm.

4. Dishwasher (110) according to one of the preceding claims, wherein the receiving device (186) has at least one electronic interface (188) for receiving the spatial information.

5. Dishwasher (110) according to one of the preceding claims, wherein the receiving device (186) comprises at least one sensor (190) for sensing the spatial information.

6. Dishwasher (110) according to the preceding claim, wherein the sensor (190) has at least one sensor, selected from the group consisting of: a GPS sensor (196); a tilt sensor (192); an acceleration sensor (194); a pressure sensor; a triangulation sensor.

7. Dishwasher (110) according to one of the preceding claims, wherein the controller (166) has at least one digitized map with a plurality of possible locations at which the dishwasher (110) may be located.

8. Dishwasher (110) according to one of the preceding claims, wherein the dishwasher (110) also has at least one equalizing tank (174), the controller (166) being configured to transfer part of the cleaning fluid (126) from the washing tank (128) into the equalizing tank (174) when there is a lowering of the target level and / or the controller (166) also being designed to transfer part of the cleaning fluid (126) from the equalizing tank (174) into the washing tank (128) when there is a raising of the target level.

9. Dishwasher (110) according to one of the preceding claims, wherein the dishwasher (110) is designed as a batch dishwasher (162), the controller (166) being programmed to perform at least one cleaning program, the cleaning program comprising at least one washing step in which the cleaning fluid (126) from the washing tank (128) is applied to the items to be cleaned (112), the controller (166) being designed to change the target level in the washing tank (128) in accordance with the spatial information during the washing step.

10. Dishwasher (110) according to one of the preceding claims, wherein the receiving device (186) is also designed to receive at least one item of type information concerning the type of the means of transport (114), the controller (166) being designed to take the type information into account when determining the target level.

11. Dishwasher (110) according to one of the preceding claims, wherein the receiving device (186) is also designed to receive at least one control signal from the means of transport (114), the controller (166) being designed to take the control signal into account when determining the target level.

12. Means of transport (114), comprising at least one dishwasher (110) according to one of the preceding claims.

13. Method for operating the dishwasher (110) according to one of the preceding claims concerning a dishwasher (110) in a means of transport (114), comprising the following steps: i) receiving the at least one item of spatial information concerning the dishwasher (110) by means of the receiving device (186); ii) determining the target level in accordance with the spatial information by means of the controller (166); and iii) controlling the filling level of the washing tank (128) with the cleaning fluid (126) to the target level corresponding to the spatial information.

14. Computer program for use in a controller (166) of a dishwasher (110) according to one of the preceding claims concerning a dishwasher (110), wherein the computer program comprises commands which cause the controller (166) to determine the target level in accordance with the spatial information.

15. Use of a dishwasher (110) according to one of the preceding claims concerning a dishwasher (110) in a means of transport (114), in particular a means of transport (114) selected from the group consisting of: a railway train, in particular a dining car of a railway train; an overland bus; a ship; an aircraft; a mobile field kitchen.

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