Cartridge for treating agent for dishwasher, and dishwasher

Abstract

A dishwasher (1) comprises a wash chamber (110) with one or more dispensing devices (111a-d), a docking unit (120) for docking one or more cartridges (2) for one or more treatment agents, and one or more connection units (130) each for directly or indirectly connecting a corresponding cartridge (2) docked to the docking unit (120) to the one or more dispensing devices (111a-d) or a wash tank (180) or a boiler (190) of the dishwasher (1) for using the one or more treatment agents for one or more washing cycles of the dishwasher (1).

Description

BESCHREIBUNG

[0001] The present invention relates to a cartridge for a treatment agent for a dishwasher, a system of several cartridges, a dishwasher, and a system comprising a dishwasher and one or more cartridges.

[0002] Dishwashers generally require one or more treatment agents for one or more dishwashing cycles, such as detergent, rinse aid, and / or an enzyme solution. Refilling these treatment agents poses a risk to the user, as this step can bring them into direct contact with the substances, potentially causing skin and eye injuries and thus endangering their health.

[0003] Furthermore, multiple cleaning agents used simultaneously for one or more wash cycles, such as detergent and rinse aid, can easily be confused, thus impairing the quality of the wash cycle(s). Mixing detergent and rinse aid also creates chemical deposits that can clog the dosing hoses, reducing the dishwasher's lifespan or causing malfunctions.

[0004] Commercial dishwashers, in particular, consume large quantities of cleaning agents in a short time. Therefore, large storage containers are used, especially in commercial settings, to ensure a continuous supply of these agents. Smaller or lighter containers are not economically viable, as the required quantity of cleaning agents leads to a short lifespan for the storage packs, especially in larger dishwashing operations.

[0005] The treatment agent can be drawn directly from the storage containers or bins using a dosing lance and used for one or more dishwasher cycles. If this arrangement is not possible due to space constraints, dishwashers with integrated storage tanks are used as an alternative; these must be filled by the user with the treatment agent from the storage containers.

[0006] However, the detergent containers currently available for commercial dishwashers are heavy and unwieldy due to their size. Furthermore, transporting these containers usually requires hazardous materials transport, as the potential hazard is particularly high due to their size. This means that if liquid leaks or the detergent is accidentally released from a container during transport, it can cause significant damage to people, the environment, and property. For this reason, special safety measures must be taken, which increase transport costs.

[0007] In smaller dishwashing operations or for low-volume use, the large reservoirs also experience longer periods of inactivity. This deteriorates the quality of the treatment agents and limits their usability. Particularly with solid treatment agents, which are usually hygroscopic substances, water can accumulate in the reservoirs. Furthermore, the chemicals in the treatment agents can dissolve and precipitate due to temperature fluctuations between dishwasher operation and downtime, forming disruptive deposits that can clog the dishwasher's dosing pumps and hoses. Finally, solvent evaporation can also cause the solubility limit of some substances to be exceeded, thus restricting the usability of the treatment agents.

[0008] Furthermore, large containers or tubs make it difficult to pour the cleaning agents into the dishwasher. The weight of the tubs makes it hard for the user to aim, which can easily lead to spills. Especially when the tub is full, the flow of the cleaning agent can be disrupted by the tub's closure. This can cause splashing and spillage, posing a health risk to the user.

[0009] It is an object of the present invention to provide one or more cartridges for one or more treatment agents for a dishwasher, a dishwasher and a system comprising the dishwasher and the one or more cartridges, which improve the refilling of treatment agents for the dishwasher with regard to user-friendliness and / or the hazard potential, taking into account the desired applications.

[0010] This task is solved by a dishwasher according to aspect 1, a system of cartridges according to aspect 13, a dishwashing system according to aspect 15, and a cartridge according to aspect 18. Aspects 2 to 12 relate to particularly advantageous implementations of the dishwasher according to aspect 1, aspect 14 relates to a particularly advantageous implementation of the system of cartridges according to aspect 13, and aspects 16 and 17 relate to particularly advantageous implementations of the dishwashing system according to aspect 15.

[0011] According to the present invention, a dishwasher comprises a washing chamber or washing container with one or more dispensing devices, a docking unit for docking one or more cartridges for one or more treatment agents, and one or more connection units, each for directly or indirectly connecting a corresponding cartridge docked to the docking unit to the one or more dispensing devices or a washing tank or boiler of the dishwasher for using the one or more treatment agents for one or more washing cycles of the dishwasher.

[0012] In this context, "direct or indirect connection" of a cartridge to the one or more dispensing devices, the rinsing tank, or the boiler means that further components may be connected between the cartridge and the one or more dispensing devices, the rinsing tank, or the boiler, such as one or more pumps, valves, sensors, in particular level sensors, tanks, or reservoirs.

[0013] A cartridge can also be described as a sealed, packaged reservoir of treatment agent. Each of the one or more cartridges can be a disposable cartridge or a refillable cartridge. The cartridge can be designed as a rigid container with a fixed or defined fit; in this case, it is advantageous for the cartridge to have a vent valve or vent membrane to compensate for volume changes within the cartridge due to the consumption of the treatment agent. Alternatively, the cartridge can be designed as a flexible pouch or as a "bag-in-box" system; in this case, the vent valve or vent membrane can be omitted, as the volume changes within the cartridge can be compensated for by its own contraction.The cartridge may also contain other components besides a treatment agent reservoir, such as a coded closure part or integrated intelligence, which are described below.

[0014] Each of the one or more treatment agents can be a liquid, a highly concentrated (i.e., a liquid with high viscosity), a gel, a powder, or a solid. The treatment agent may also be referred to as a detergent, dishwashing liquid, or dishwashing chemical. Examples of treatment agents include a cleaner, a rinse aid, and an enzyme solution. The one or more treatment agents in each cartridge can be the same or different. For example, one cartridge may contain a cleaner and another cartridge a rinse aid. In this case, the treatment agents in the one or more cartridges can be used simultaneously for one or more wash cycles. Alternatively, two or more cartridges may each contain the same treatment agent.In this case, the two or more cartridges can be used sequentially, and at least one cartridge can serve as a reserve cartridge. This reserve cartridge is only connected to the one or more dispensing devices, a flushing tank, or a boiler via a suitable connection unit once another cartridge has been completely or almost completely emptied. Using two or more cartridges in parallel also extends the cartridge replacement intervals. This contributes to user-friendliness and minimizes risks. Finally, a single cartridge can also contain several different treatment agents, each located in compartments separated by partitions within the cartridge.When such a cartridge is connected to one or more dispensing devices, the rinsing tank or the boiler by means of a suitable connection unit, the multiple treatment agents from the cartridge can be used simultaneously for one or more rinsing processes.

[0015] The docking unit can comprise a fastening unit for attaching the one or more cartridges to the dishwasher and / or a positioning unit for positioning the one or more cartridges relative to the dishwasher. In particular, the docking unit can comprise a machine-side closure element, and the cartridge can comprise a cartridge-side closure element. The machine-side closure element and the cartridge-side closure element can form a closure by which the cartridge can be positioned relative to the docking unit and / or attached to the docking unit. The closure can be, in particular, a screw closure, a snap closure, another mechanical closure, or an electromechanical closure. Furthermore, the docking unit can be designed as a receiving unit for receiving the one or more cartridges.In particular, the docking unit can be designed as a cartridge compartment into which one or more cartridges can be inserted and which encloses the inserted one or more cartridges from one or more sides by respective wall sections of the cartridge compartment.

[0016] The one or more connection units can each be designed as a pin that pierces a membrane of the corresponding cartridge or actuates a check valve of the corresponding cartridge to connect the corresponding cartridge to the one or more dispensing devices, the wash tank, or the boiler. When a cartridge is connected to the one or more dispensing devices by means of the corresponding connection unit, the treatment agent can flow from the cartridge, for example, via a supply line to the one or more dispensing devices and be dispensed by the one or more dispensing devices into the wash chamber to be used for one or more dishwasher cycles. When the cartridge is connected to the wash tank or the boiler by means of the corresponding connection unit, the treatment agent from the cartridge can, for example,The treatment agent flows into the wash tank or boiler via a feed line to be available for one or more dishwasher wash cycles. Alternatively, the treatment agent can first flow into a reservoir and then be dispensed from the reservoir to one or more dispensing devices, the wash tank, or the boiler, as described in more detail below. The one or more connection units can be integrated into the docking unit or be separate from it. When a cartridge is docked to the docking unit, it can be automatically connected to the one or more dispensing devices, the wash tank, or the boiler via a corresponding connection unit.Alternatively, the cartridge can be docked to the docking unit without being automatically connected to the one or more dispensing devices, the rinsing tank, or the boiler; in this case, the cartridge docked to the docking unit can only be connected to the one or more dispensing devices, the rinsing tank, or the boiler at a later time, e.g., by separate user operation, using the appropriate connection unit, as described in more detail below.

[0017] The dishwasher according to the invention has the advantage that the treatment agent required for one or more washing cycles can be easily refilled by docking and connecting a new cartridge or by changing the cartridge, without the user coming into direct contact with the treatment agent. This reduces the risk of health hazards and increases user-friendliness.

[0018] Furthermore, no external devices or refilling systems, such as a dosing lance, are required to refill the treatment agent. This makes refilling the treatment agent faster, easier, and less time-consuming for the user, thus increasing user-friendliness.

[0019] Furthermore, unlike conventional storage containers, the cartridges according to the invention are accommodated in the dishwasher and are therefore particularly space-saving, which further increases user-friendliness.

[0020] Finally, the cartridges can be flexibly designed in shape and size, and in particular be smaller and lighter than conventional storage containers, making them easier for the user to lift. This also facilitates the regulation of the treatment agent quantity, especially for smaller dishwashing operations or those with low volume of dishes. Furthermore, it can reduce the effort and costs associated with transporting the cartridges, particularly when the maximum capacity of the cartridges for the treatment agent falls within the "Limited Quantities" regulations for the transport of hazardous materials, as described in more detail below.

[0021] In summary, the dishwasher according to the invention makes refilling the treatment agent safer (since, for example, transferring the treatment agent from a storage container is replaced by changing the cartridge, thus avoiding direct contact between the user and the treatment agent), easier (since the heavy and unwieldy storage containers are replaced by lighter and more manageable cartridges, and external devices or refilling systems are no longer required), and more economical (since the transport route to the customer becomes more cost-effective, for example, through the "Limited Quantities" regulation, and users who wash dishes infrequently can better estimate the amount of dishwashing chemicals needed, so that no partially used storage containers have to sit around). The flexible operation of the machine is also increased by the ability to use different treatment agents in smaller packaging units without having to use them all up.

[0022] In a preferred embodiment of the dishwasher according to the invention, the docking unit comprises a first docking section for docking a first cartridge and a second docking section for docking a second cartridge, wherein the first cartridge cannot be docked to the second docking section and / or the second cartridge cannot be docked to the first docking section. The first docking section and the second docking section can each be subsections of a one-piece docking unit, or the first docking section and the second docking section can be separately formed components of the dishwasher.

[0023] In particular, the first docking section can include a first machine-side closure part, and the second docking section can include a second machine-side closure part. Furthermore, the first cartridge can include a first cartridge-side closure part, and the second cartridge can include a second cartridge-side closure part. As described above, the first machine-side closure part and the first cartridge-side closure part can form a first closure, while the second machine-side closure part and the second cartridge-side closure part can form a second closure.It can be advantageous if the first and second closures are designed differently, so that the first cartridge-side closure part cannot be attached to the second machine-side closure part, and / or the second cartridge-side closure part cannot be attached to the first machine-side closure part. In this case, the first and second closures can be referred to as coded closures, and both the cartridge-side and machine-side closure parts of the first and second closures can each be designated as coded closure parts. In other words, the first and second docking sections can each be designed for the precise, but preferably not exclusively, unique positioning and / or attachment of a corresponding cartridge.

[0024] Additionally or alternatively, the first and second docking sections can each have a different size or shape, so that only a cartridge of a corresponding size or shape can be docked to the respective docking section. In particular, the first and second docking sections can each be designed as a separate receiving unit for a corresponding cartridge. Specifically, each docking section can be designed as a separate cartridge compartment into which only a cartridge of a corresponding size or shape can be inserted.

[0025] Additionally or alternatively, the first and second docking sections can each have a different color coding, corresponding to the color coding of the cartridges. For example, a docking unit marked with a first color may be intended or suitable for docking a cartridge marked with the first color, and a docking unit marked with a second color may be intended or suitable for docking a cartridge marked with the second color. The different colors of the docking points and cartridges allow the user to easily assign the cartridges to the respective docking sections, even without language skills.

[0026] The preferred embodiment described above is particularly advantageous because it prevents the user from confusing different cartridges and thus different dishwasher treatment agents. This increases user-friendliness and safety with regard to refilling the treatment agents.

[0027] Furthermore, the dishwasher can include a first connection unit for connecting the first cartridge, docked to the first docking section, to one or more dispensing devices, the wash tank, or the boiler, and a second connection section for connecting the second cartridge, docked to the second docking section, to one or more dispensing devices, the wash tank, or the boiler. The first and second connection units can be separate and independently connect the first and second cartridges, respectively, to the one or more dispensing devices, the wash tank, or the boiler. This allows the treatment agents from the first and second cartridges to be used independently for one or more wash cycles, depending on the user's desired settings. Alternatively, the first and second connection units can be connected to each other.The cartridges must be coupled so that the first and second cartridges can only be connected simultaneously to the one or more dispensing devices, the wash tank, or the boiler. This ensures the simultaneous use of both treatment agents for optimal washing results and simplifies the operation of the dishwasher.

[0028] In a particularly preferred embodiment, the first docking section comprises a first identification and locking segment. This first identification and locking segment is configured to engage with a first counter-locking segment of the first cartridge for identification purposes. The first identification and locking segment is further configured to engage with a third counter-locking segment of the first cartridge for docking the identified first cartridge to the first docking section. The first identification and locking segment can, in particular, be a component of the first machine-side closure part. Likewise, the second docking section comprises a second identification and locking segment. This second identification and locking segment is configured to engage with a second counter-locking segment of the second cartridge for identification purposes.The second identification and locking segment is further designed to engage with a fourth counter-locking segment of the identified second cartridge, thus docking the identified second cartridge to the second docking section. The second identification and locking segment can, in particular, be a component of the second machine-side closure part.

[0029] In particular, the first identification and locking segment can include a projection, and the first and third counter-locking segments of the first cartridge can each include a recess into which the projection of the first identification and locking segment can engage. Alternatively, the first identification and locking segment can include a recess, and the first and third counter-locking segments of the first cartridge can each include a projection that can engage in the recess of the first identification and locking segment. The same applies to the second cartridge; that is, the second identification and locking segment can include a projection, and the second and fourth counter-locking segments of the second cartridge can each include a recess into which the projection of the second identification and locking segment can engage.Alternatively, the second identification and locking segment may include a recess, and the second and fourth counter-locking segments of the second cartridge may each include a projection that can engage in the recess of the second identification and locking segment.

[0030] The size and / or shape of the first identification and locking segment may differ from the size and / or shape of the second identification and locking segment, such that the first identification and locking segment cannot be locked into either the second or the fourth locking segment of the second cartridge, and / or the second identification and locking segment cannot be locked into either the first or the third locking segment of the first cartridge. This allows, in particular, the identification or recognition of the first cartridge by the first identification and locking segment, by locking into the first locking segment of the first cartridge, and the identification or recognition of the second cartridge by the second identification and locking segment, by locking into the second locking segment of the second cartridge. Thus, the first orThe second cartridge is identified before it is docked to the respective first or second docking section and connected to the one or more dispensing devices, the wash tank, or the boiler via the first or second connection unit. This prevents the first cartridge from docking to the second docking section or the second cartridge from docking to the first docking section. In other words, it prevents an incorrect or unsuitable cartridge, especially one for an incorrect or unsuitable treatment agent, from being docked to a docking section, or from a user attempting to dock the incorrect or unsuitable cartridge. This prevents damage to the cartridge, the docking unit, the connection unit, and / or other components of the dishwasher, as well as a reduction in washing quality.The different size and / or shape of the respective identification and locking segments represents a particularly efficient, easy-to-produce, and cost-effective means of identifying the individual cartridges. Further advantages of this embodiment are described below in connection with the cartridge system comprising the first and second cartridges.

[0031] Furthermore, the material of the first identification and locking segment may differ from the material of the second identification and locking segment. In particular, an electrical, magnetic, or optical property of the material of the first identification and locking segment may differ from an electrical, magnetic, or optical property of the material of the second identification and locking segment. For example, the material of the first identification and locking segment may be magnetic and the material of the second identification and locking segment may be non-magnetic, or the magnetic susceptibility of the first identification and locking segment may differ from the magnetic susceptibility of the second identification and locking segment.Furthermore, the material of the first identification and locking segment may be electrically conductive and the material of the second identification and locking segment may not be electrically conductive, or the electrical conductivity of the first identification and locking segment may differ from the electrical conductivity of the second identification and locking segment.

[0032] When the first or second identification and locking segment engages with the first counter-locking segment of the first cartridge or the second counter-locking segment of the second cartridge, the material of the first or second identification and locking segment can be detected or recognized by the respective cartridge. For example, a property of the material of an identification and locking segment, such as electrical conductivity, magnetic susceptibility, or an optical property such as the color or transparency of the material, can be detected or measured by the respective cartridge, e.g., using a conductivity sensor, a Hall sensor, or an optical sensor on the cartridge. Alternatively, the material of the respective identification and locking segment can be recognized through interaction with the material of a counter-locking segment of the respective cartridge, e.g., through magnetic attraction or repulsion between the two materials.

[0033] The detection result can be converted into a signal, preferably an electrical signal, which, for example, controls a mechanical locking mechanism for the respective cartridge or docking section. This allows or prevents the first or second identification and locking segment from engaging with the third or fourth locking segment of the first cartridge or the fourth locking segment of the second cartridge, thus enabling or preventing the respective cartridge from docking with the respective docking section, depending on the detected material (the third and fourth locking segments are described in more detail below). Alternatively, the signal can be output to the user to inform them whether the respective cartridge is suitable for docking with the respective docking section or not.For example, depending on the presence of magnetic attraction or repulsion between a cartridge and a docking section, the user can determine whether the cartridge is suitable for docking with that section. This allows, in particular, the identification of the first and second cartridges by the first and second identification and locking segments, respectively. Using different materials for the first and second identification and locking segments represents a particularly efficient, easy-to-manufacture, and cost-effective means of cartridge identification.

[0034] In a further preferred embodiment, the first docking section (or the first identification and locking segment) comprises a first identification transmitter for sending a first identification signal, and the second docking section (or the second identification and locking segment) comprises a second identification transmitter for sending a second identification signal, wherein the second identification signal differs from the first identification signal. Furthermore, the first cartridge (or the first locking segment) comprises a first identification receiver for receiving and identifying the first identification signal, and the second cartridge (or the second locking segment) comprises a second identification receiver for receiving and identifying the second identification signal. Furthermore, the dishwasher and / or the first and second cartridges can be configured tothat: i) if the first identification receiver receives the first identification signal, the first cartridge can be docked to the first docking section and / or connected to the one or more dispensing devices, the rinsing tank, or the boiler via the first connection unit; ii) if the first identification receiver receives the second identification signal, the first cartridge cannot be docked to the second docking section and / or cannot be connected to the one or more dispensing devices, the rinsing tank, or the boiler via the second connection unit; iii) if the second identification receiver receives the second identification signal,the second cartridge is dockable to the second docking section and / or is connectable to the one or more dispensing devices, the rinsing tank, or the boiler via the second connection unit; and / or ii) if the second identification receiver receives the first identification signal, the second cartridge is not dockable to the first docking section and / or is not connectable to the one or more dispensing devices, the rinsing tank, or the boiler via the first connection unit.

[0035] The first and second identification transmitters can each be RFID transponders, and the first and second identification receivers can each be RFID readers. Conversely, the identification transmitters can also be contained in the respective cartridges and the identification receivers in the respective docking sections.

[0036] Note that only two different docking sections for attaching a corresponding cartridge were described above. However, a dishwasher can also have three or more docking sections, each different or identical, for attaching a cartridge. For example, a dishwasher could have three docking sections, one for detergent, one for rinse aid, and one for another treatment agent (such as defoamer, enzyme cleaner, or disinfectant).

[0037] In another preferred embodiment, the docking unit is designed to dock a plurality of identical or substantially identical cartridges. This allows, in particular, a plurality of cartridges for the same treatment agent to be docked to the docking unit and connected to one or more dispensing devices, the rinsing tank, or the boiler by means of appropriate connection units. This reduces the size and weight of the individual cartridges and further simplifies their transport and handling. Furthermore, the multiple identical or substantially identical cartridges can be used sequentially.For example, a second cartridge, serving as a reserve cartridge, can only be connected to the one or more dispensing devices, the wash tank, or the boiler via the second connection unit once the first cartridge, already connected to the one or more dispensing devices, the wash tank, or the boiler via the first connection unit, has been completely or almost completely emptied. This has the advantage that the quality of the treatment agent in the reserve cartridge does not deteriorate until the reserve cartridge is connected to the one or more dispensing devices, the wash tank, or the boiler. This further simplifies the regulation of the treatment agent quantity, particularly for smaller dishwashing operations or those with low-volume dishwashing.

[0038] In a further preferred embodiment, the docking unit is arranged to be movable back and forth relative to the rinsing chamber between a docking position for docking the one or more cartridges and an operating position for connecting, by means of the one or more connection units, the docked one or more cartridges to the one or more dispensing devices or the rinsing tank or the boiler, wherein the operating position differs from the docking position.

[0039] Thus, the one or more cartridges can be docked to the docking unit in the docking position without being automatically connected to the one or more dispensing devices, the rinsing tank, or the boiler via the one or more connection units. In particular, the one or more cartridges can be connected to the one or more dispensing devices, the rinsing tank, or the boiler via the one or more connection units at a later time, once the docking unit has moved into the operating position.This enables the gradual and safe docking of one or more cartridges to the docking unit and the safe connection of one or more cartridges to the one or more dispensing devices, the wash tank, or the boiler, thus preventing damage to the cartridges, the docking unit, the one or more connection units, or other components of the dishwasher. In particular, the user can choose when to connect the one or more cartridges to the one or more dispensing devices, the wash tank, or the boiler independently of when the one or more cartridges dock to the docking unit, thereby increasing user-friendliness.

[0040] When the docking unit is in the operating position, according to a particularly preferred embodiment, at least one connection unit is arranged to be movable back and forth relative to the docking unit between a first position and a second position. When the at least one connection unit is in the first position, the cartridge docked to the docking unit, corresponding to the at least one connection unit, is not connected to the one or more dispensing devices, the rinsing tank, or the boiler. When the connection unit is in the second position, the cartridge is connected to the one or more dispensing devices, the rinsing tank, or the boiler. This is particularly preferred for each of the one or more connection units.Each of the one or more connection units can be arranged to be movable back and forth relative to the docking unit between a respective first position and a respective second position, as described above.

[0041] Thus, one or more cartridges can be docked to the docking unit in the docking position, and the docking unit can be moved into the operating position, without the one or more cartridges being automatically connected to the one or more dispensing devices, the rinsing tank, or the boiler via the one or more connection units. For example, in a first step, the one or more cartridges can be docked to the docking unit; in a second step, the docking unit can be moved into the operating position; and only in a third step can the one or more connection units be moved from the first position to the second position to connect the one or more cartridges to the one or more dispensing devices, the rinsing tank, or the boiler.This ensures a step-by-step, safe docking of the one or more cartridges to the docking unit, a safe movement of the docking unit into the operating position, and a safe connection of the one or more cartridges to the one or more dispensing devices, the wash tank, or the boiler, thus preventing damage to the cartridge, the docking unit, the one or more connection units, or other components of the dishwasher. In particular, the user can choose when to connect the one or more cartridges to the one or more dispensing devices, the wash tank, or the boiler independently of the docking time and when the docking unit is moved into the operating position, further enhancing user-friendliness.

[0042] According to a further preferred embodiment, the dishwasher further comprises a housing with a housing opening for inserting one or more cartridges into the dishwasher and with an opening and closing unit, wherein the opening and closing unit can in particular be designed as a hinged, sliding, rotating, or pivoting unit. The opening and closing unit is arranged to be movable back and forth between an opening position for opening the housing opening and a closing position for closing the housing opening, in particular by being hinged, sliding, rotatable, or pivotable. The opening and closing unit is connected to the docking unit in such a way that when the opening and closing unit is in the opening position, the docking unit is in the docking position, and when the opening and closing unit is in the closed position, the docking unit is in the operating position.

[0043] The opening and closing unit can be, in particular, a dispensing flap that opens and closes a dispensing opening in the dishwasher housing, through which one or more cartridges can be inserted into the dishwasher. When the opening and closing unit is in the open position, the docking unit is in the docking position, allowing the one or more cartridges to be easily docked onto the docking unit by a user. By moving the opening and closing unit to the closed position, the one or more cartridges can then be conveyed through the housing opening into the interior of the dishwasher. Simultaneously, the docking unit moves into the operating position, so that after moving the opening and closing unit to the closed position, no further user action is required to move the docking unit into the operating position.This increases user-friendliness with regard to refilling the treatment agent.

[0044] According to a further preferred embodiment, the dishwasher comprises at least one reservoir for receiving the treatment agent from at least one cartridge and for dispensing the treatment agent to one or more dispensing devices, the wash tank, or the boiler. The reservoir can also be referred to as a buffer tank. The reservoir includes a sensor for determining a quantity, such as a volume or a weight, of the treatment agent in the reservoir. The quantity of the treatment agent can be determined, for example, by capacitive, optical, mechanical, or another physical method of measuring the fill level of the treatment agent in the reservoir. A maximum intake quantity of the treatment agent in the cartridge can be equal to or greater than a maximum intake quantity of the treatment agent in the reservoir. In particular, the maximum intake quantity of the treatment agent in the cartridge can be a multiple, e.g.,The reservoir capacity may be double, triple, quadruple, quintuple, or ten times the maximum capacity of the treatment agent. Note that the dishwasher may also include multiple reservoirs, each designed to hold the treatment agent from a corresponding cartridge and to dispense the treatment agent from the corresponding cartridge to one or more dispensing devices, the wash tank, or the boiler. Furthermore, each of the multiple reservoirs may include a sensor for determining the quantity of treatment agent in the respective reservoir and for controlling the dishwasher accordingly.

[0045] The embodiment described above has the advantage that even after the cartridge has been completely emptied, one or more wash cycles are still possible by using the treatment agent from the reservoir for these cycles. In particular, the reservoir in the dishwasher can serve as a dry-run protection mechanism for the treatment agent's delivery system. This allows the cartridge to be emptied completely, especially of chemical residue. Furthermore, the sensor can determine the remaining amount of treatment agent in the reservoir and control the dishwasher accordingly. For example, the remaining amount of treatment agent in the reservoir can be displayed to the user so that they can change the cartridge in time and thus prevent the reservoir from being completely emptied. Another advantage of integrating the sensor into the dishwasher's reservoir, instead of, for example,The advantage of the cartridge is that less waste is produced and the use of more durable technologies is made possible.

[0046] In particular, the dishwasher can be configured to issue a warning signal when the amount of detergent in the reservoir, as determined by the sensor, falls below a first minimum value. The warning signal can include an audible signal and / or a display on the dishwasher. The first minimum value can be equal to or greater than the amount of detergent required for one or more dishwasher cycles. Specifically, the first minimum value can be a multiple of the required amount, e.g., double, triple, quadruple, quintuplet, or ten times. The warning signal can prompt the user to change the cartridge in a timely manner, while there is still enough detergent in the reservoir for one or more remaining wash cycles, even though the cartridge is already nearly empty.This ensures the continuous availability of the treatment agent and increases user-friendliness. Furthermore, completely emptying the cartridges improves efficiency and protects the environment, as less treatment agent is wasted.

[0047] According to a further preferred embodiment, the dishwasher comprises a valve and a control unit. The valve is designed such that when the at least one cartridge is connected to the one or more dispensing devices, the wash tank, or the boiler via the corresponding connection unit, and the valve is open, the treatment agent can flow from the cartridge into the reservoir. The valve is further designed such that when the valve is closed, the treatment agent cannot flow from the cartridge into the reservoir. The control unit is configured to open and close the valve based on the amount of treatment agent in the reservoir determined by the sensor. The control unit can be implemented, in particular, by a mechanical component, a hardware component, and / or a software component of the dishwasher.

[0048] The valve and control unit enable efficient, automatic control of the amount of treatment agent in the reservoir, thus increasing the user-friendliness of the dishwasher.

[0049] In particular, the control unit can be configured to open the valve when the amount of treatment agent in the reservoir, as determined by the sensor, falls below a second minimum value, preferably a second minimum value being greater than the first minimum value. The second minimum value can be equal to or greater than the amount of treatment agent required for one or more dishwasher cycles. Specifically, the second minimum value can be a multiple, e.g., double, triple, quadruple, quintuplet, or ten times, of the required amount. This configuration of the control unit ensures that the amount of treatment agent in the reservoir does not fall below the second minimum value, at least as long as there is still treatment agent in the cartridge that can flow into the reservoir.This ensures the permanent availability of the treatment agent in the reservoir, increases user-friendliness, and improves rinsing quality.

[0050] Furthermore, the control unit can be configured to close the valve when the amount of treatment agent in the reservoir, as determined by the sensor, exceeds a maximum value, preferably greater than the first minimum value and / or greater than the second minimum value. The maximum value can be equal to or greater than the amount of treatment agent required for one or more dishwasher cycles. In particular, the maximum value can be a multiple, e.g., double, triple, quadruple, quintuplet, or ten times, of the required amount. This configuration of the control unit ensures that the amount of treatment agent in the reservoir does not exceed the maximum value. This is particularly advantageous when the user only wants to perform a small number of wash cycles and wants to store the remaining treatment agent in the cartridge for later use.This increases user-friendliness with regard to refilling the treatment agent.

[0051] According to the present invention, a system of several cartridges for one or more treatment agents for a dishwasher comprises at least a first cartridge and a second cartridge. The first cartridge comprises a first locking segment for engaging the first identification and locking segment, and the second cartridge comprises a second locking segment for engaging the second identification and locking segment. The size and / or shape of the first locking segment may differ from the size and / or shape of the second locking segment. This enables, as described above in connection with the dishwasher according to the invention, identification or recognition of the first cartridge by the engagement of the first identification and locking segment with the first locking segment of the first cartridge, as well as identification or recognition of the second cartridge.The second cartridge is identified by the second identification and locking segment engaging with the second corresponding locking segment of the second cartridge. This prevents damage to the cartridge system or the dishwasher, as well as a reduction in washing quality, caused by docking or connecting an incorrect or unsuitable cartridge, as described above. The different size and / or shape of the respective locking segments represents a particularly efficient, easy-to-produce, and cost-effective means of identifying the individual cartridges.

[0052] Furthermore, the material of the first locking segment may differ from the material of the second locking segment. In particular, an electrical, magnetic, or optical property of the material of the first locking segment may differ from an electrical, magnetic, or optical property of the material of the second locking segment. For example, the material of the first locking segment may be magnetic and the material of the second locking segment may be non-magnetic, or the magnetic susceptibility of the first locking segment may differ from the magnetic susceptibility of the second locking segment. Furthermore, the material of the first locking segment may be electrically conductive and the material of the second locking segment may be non-conductive, or the electrical conductivity of the first locking segment may differ from the electrical conductivity of the second locking segment.

[0053] When the first or second identification and locking segment engages with the first mating segment of the first cartridge or the second mating segment of the second cartridge, the material of the respective mating segment can be detected or recognized by the respective identification and locking segment. For example, a property of the mating segment's material, such as electrical conductivity, magnetic susceptibility, or an optical property like the material's color or transparency, can be detected or measured by a docking section, e.g., using a conductivity sensor, a Hall sensor, or an optical sensor on the docking section. Alternatively, the material of a mating segment can be recognized through its interaction with the material of an identification and locking segment, e.g., through magnetic attraction or repulsion between the two materials.

[0054] The detection result can be converted into a signal, preferably an electrical signal, which, for example, controls a mechanical locking mechanism of the respective docking section or cartridge. This allows or prevents the first or second identification and locking segment from engaging with the third locking segment of the first cartridge or the fourth locking segment of the second cartridge, thus enabling or preventing the respective cartridge from docking onto the respective docking section, depending on the detected material (the third and fourth locking segments are described in more detail below). Alternatively, the electrical signal can be output to the user to inform them whether the respective cartridge is suitable for docking onto the respective docking section or not.For example, depending on the presence of magnetic attraction or repulsion between a cartridge and a docking section, the user can determine whether the cartridge is suitable for docking to that section. This allows for the identification of the first and second cartridges by their respective identification and locking segments. Using different materials for the first and second locking segments of the first and second cartridges, possibly in combination with different materials for the first and second identification and locking segments of the first and second docking section, represents a particularly efficient, easy-to-manufacture, and cost-effective method for cartridge identification.According to a preferred embodiment, the first cartridge further comprises a third locking segment for engaging the first identification and locking segment, wherein a size and / or a shape and / or a material of the third locking segment is identical or nearly identical to a size and / or a shape and / or a material of the first locking segment, and wherein the third locking segment and the first locking segment are spaced apart from each other in an insertion direction of the first cartridge into the dishwasher.Furthermore, the second cartridge comprises a fourth locking segment for engaging the second identification and locking segment, wherein a size and / or a shape and / or a material of the fourth locking segment is identical or nearly identical to a size and / or a shape and / or a material of the second locking segment, and wherein the fourth locking segment and the second locking segment are spaced apart from each other in an insertion direction of the second cartridge into the dishwasher.

[0055] This allows the first identification and locking segment to engage with the first corresponding locking segment of the first cartridge when the first cartridge is inserted into the dishwasher, thus identifying and recognizing the first cartridge. Only after the first cartridge has been identified and recognized can the first identification and locking segment engage with the third corresponding locking segment of the first cartridge, thereby docking the first cartridge to the first docking section. This can be achieved, for example, by the user applying further force to the first cartridge in the insertion direction, causing the first identification and locking segment to disengage from the first corresponding locking segment and then engage with the third corresponding locking segment. Therefore, the first cartridge can only dock to the first docking section after it has been identified by the first identification and locking segment.Similarly, the second cartridge can only dock at the second docking section after it has been identified by the second identification and locking segment. This prevents the first cartridge from docking at the second docking section or vice versa. As described above, this prevents damage to the cartridge system or the dishwasher, as well as a reduction in washing quality caused by docking or connecting the wrong cartridge.

[0056] According to the present invention, a dishwashing system comprises the dishwasher and one or more cartridges, preferably a system of multiple cartridges as described above. The dishwashing system increases user-friendliness with regard to refilling the treatment agent.

[0057] According to a further preferred embodiment of the dishwashing system, the multiple cartridges each have the same or substantially the same shape and / or size and / or maximum capacity for the respective treatment agent.

[0058] This simplifies the production, transport, and storage of multiple cartridges, thus saving costs. Furthermore, it allows multiple cartridges to be emptied simultaneously, for example, when the same amount of treatment agent is used from each cartridge for one or more rinsing cycles. This enables the user to replace multiple cartridges at the same time, reducing the frequency of cartridge changes. Consequently, user-friendliness and safety are improved when refilling the treatment agent.

[0059] According to a further preferred embodiment of the dishwashing system, at least one cartridge of the one or more cartridges comprises an outlet opening and one or more drain surfaces, which are designed such that, when the cartridge is connected to the one or more dispensing devices or the washing tank or the boiler by means of the corresponding connection unit, the treatment agent can flow from the cartridge along the one or more drain surfaces in the direction of the outlet opening and out of the cartridge through the outlet opening to flow to the one or more dispensing devices or into the washing tank or the boiler or the reservoir, wherein at least one drain surface or each drain surface is inclined with respect to an outlet direction of the treatment agent from the cartridge at a respective angle greater than 0° and less than 90°, preferably at a respective angle of 45°, 50°, 60°, 70° or 80°.

[0060] This allows the treatment agent to flow along the one or more inclined drainage surfaces towards the outlet opening and exit the cartridge through the outlet opening. This enables complete or almost complete emptying of the cartridge, resulting in cost savings for the user and improved cartridge disposal.

[0061] According to the present invention, a cartridge for a treatment agent for the dishwasher described above further comprises a maximum capacity for the treatment agent, which is preferably within the "Limited Quantities" regulations for the transport of hazardous materials. The maximum capacity can, in particular, be a maximum capacity volume for the treatment agent that is less than or equal to 0.5 liters, 1 liter, 2 liters, 5 liters, 10 liters, or 20 liters. Alternatively, the maximum capacity can be a maximum weight of the treatment agent that is less than or equal to 0.5 kg, 1 kg, 2 kg, 5 kg, 10 kg, or 20 kg. Alternatively, the sum of the weight of the cartridge itself and the maximum weight of the treatment agent can be less than or equal to 0.5 kg, 1 kg, 2 kg, 5 kg, 10 kg, 20 kg, or 30 kg.

[0062] Packaging the treatment agent in individual cartridges minimizes the hazard potential to such an extent that the transport of the cartridges falls under the Limited Quantities Regulation. For example, the transport of hazardous goods in inner packaging is permitted up to a total gross weight of 30 kg for the entire package. In this case, the hazard potential is classified as lower because the total quantity of the treatment agent is divided into small individual units. The probability increases that not all individual units will be released and that the extent of damage from a single released unit will be minimal. Thus, the hazard potential from leakage of the treatment agent during transport of the cartridges can be reduced, thereby lowering the effort and costs associated with transporting the treatment agent.

[0063] In a preferred embodiment, the cartridge according to the invention can also include further complexity modules such as an integrated dispensing mechanism for the treatment agent and / or integrated intelligence (e.g., barcode, PIN coding, RFID, QR code, chip, Near Field Communication NFC). Connecting the cartridge to a dishwasher control system then allows, for example, automatic detection of the cartridge or the treatment agent within the cartridge, automatic dosing of the treatment agent based on this detection, and timely display or calculation of the remaining wash cycles, thus enabling a better assessment of whether the treatment agent remaining in the cartridge is sufficient for the wash cycle.In other words, the control of the dishwasher's dosing pumps can dispense different volumes depending on the treatment agent, with the dishwasher receiving the relevant information about the treatment agent via its integrated intelligence.

[0064] These and other features and advantages of the invention will become clear with reference to the accompanying schematic drawings, which show particularly advantageous embodiments. They show: Fig. 1 a schematic functional sketch of an embodiment of the dishwasher according to the invention; Fig. 2 a perspective view of an embodiment of the dishwasher according to the invention with two cartridges according to the invention; Fig. 3 a perspective view of a docking unit of the dishwasher with a first and a second docking section, as well as a first and a second cartridge, which can be docked to the first and second docking sections, respectively; Fig. 4a a schematic view of an embodiment of the dishwasher according to the invention with a hinged unit, wherein the hinged unit is in the open position and the docking unit is in the docking position, so that a cartridge can be docked to the docking unit; Fig. 4 a schematic view as in Fig. 4a , wherein the cartridge is already docked to the docking unit and the flap unit is moved from the open position to a closed position in order to move the docking unit from the docking position to the operating position; Fig. 4 shows a schematic view as in Fig. 4b , wherein the folding unit is in the closed position and the docking unit is in the operating position, and wherein the docked cartridge is connected to the one or more dispensing devices or the wash tank or the boiler by means of the connection unit; Fig. 5 a schematic view of an embodiment of the dishwasher according to the invention with one cartridge, wherein the dishwasher comprises a reservoir for receiving the treatment agent from the cartridge; Fig. 6a a side view of a first cartridge and a first docking section to which the first cartridge is docked; Fig. 6b a side view of a second cartridge and a second docking section to which the second cartridge is docked; Fig. 7a a top view of the first cartridge and the first docking section along the cross-sectional area AA from Fig. 6a , as well as a cross-sectional area CC, which is shown in the side view from Fig. 6a corresponds; and Fig. 7 top view of the second cartridge and the second docking section along the cross-sectional area BB from Fig. 6b , as well as a cross-sectional area DD, which is shown in the side view from Fig. 6b corresponds.

[0065] Fig. 1 Figure 1 schematically shows a functional diagram of an embodiment of a dishwasher 1 according to the invention, which has a housing 140 and a wash chamber 110. The dishwasher 1 comprises several dispensing devices for dispensing the treatment agent onto the items to be washed 111a-d, in particular a first dispensing device 111a and a third dispensing device 111c, each for dispensing a treatment agent such as a cleaning fluid into the wash chamber 110, as well as a second dispensing device 111b and a fourth dispensing device 111d, each for dispensing a further treatment agent such as a rinse aid, in particular a rinse aid, into the wash chamber 110. In this embodiment, the dispensing devices 111a-d are designed as spray arms that are rotatably arranged in the wash chamber 110 of the dishwasher 1. A wash basket 112, in particular for arranging cutlery, is also located in the wash chamber 110.

[0066] The dishwasher 1 further comprises a first docking section 120a and a second docking section 120b. A first cartridge 2a can be docked to the first docking section 120a, and a second cartridge 2b can be docked to the second docking section 120b. The first cartridge 2a can contain the cleaning fluid, and the second cartridge 2b can be filled with a rinse aid concentrate. The first cartridge 2a, docked to the first docking section 2a, can be connected to a wash tank 180 by means of a first connection unit 130a (not shown), so that the cleaning fluid from the first cartridge 2a can be transported into the wash tank 180 via a first inlet line 183. A first conveying device, in this case a first metering pump 183a, is provided in the first inlet line 183, which, when switched on, dispenses a certain amount of cleaning fluid.a conveyance of cleaning fluid from the first cartridge 2a to the rinsing tank 180 is enabled, while in a switching-off state of the first dosing pump 183a no cleaning fluid is delivered to the rinsing tank 180.

[0067] The rinsing tank 180 comprises a sieve system 182 and a heating device 181 for heating the cleaning fluid contained in the rinsing tank 180. Furthermore, the rinsing tank 180 is connected to a first discharge line 185, through which the cleaning fluid can be transported to the first discharge device 111a and the third discharge device 111c in the rinsing chamber 110. A conveying device, in this case a washing pump 185a, is provided in the first discharge line 185. When switched on, the washing pump 185a enables the discharge or conveying of cleaning fluid from the rinsing tank 180 to the discharge devices 111a and 111c, while when the washing pump 185a is switched off, no cleaning fluid is discharged to the discharge devices.

[0068] The cleaning fluid dispensed via the dispensing devices 111a and 111c collects in the wash tank 180 after being discharged into the wash chamber 110, thus creating a washing cycle. Furthermore, the dishwasher 1 includes a wastewater line 310 with a drain pump 310a, through which soiled washing fluid can be discharged from the wash tank 180 and disposed of.

[0069] The second cartridge 2b, docked to the second docking section 2a, can be connected to the boiler 190 by means of a second connection unit 130b (not shown). The rinse aid concentrate from the second cartridge 2b flows into a second inlet line 193 and is mixed with drinking water from a drinking water line 330, resulting in a diluted rinse aid solution that then flows into the boiler 190. A second conveying device, in this case a second dosing pump 193a, is provided in the second inlet line 193. When switched on, this pump delivers rinse aid concentrate from the second cartridge 2b to the boiler 190, while when the second dosing pump 193a is switched off, no rinse aid concentrate is delivered to the boiler 190. The dosing pump 193a can be used in particular to control the concentration of the rinse aid liquid, i.e.The ratio between rinse aid concentrate and drinking water can be precisely controlled. The drinking water line 330 also includes a valve device, in this embodiment a solenoid valve 340. The valve device allows drinking water to be supplied to the boiler 190 when it is in an open position, and it prevents drinking water from being supplied to the boiler 190 when it is in a closed position. A water safety device 350 is also located in the drinking water line 330.

[0070] Boiler 190 includes a heating device 191 for heating the rinse aid liquid. Furthermore, boiler 190 is connected to a second dispensing line 195, through which the rinse aid liquid can be transported to the second dispensing device 111b and the fourth dispensing device 111d in the wash chamber 110. A conveying device, in this case a rinse pump 195a, is provided in the second dispensing line 195. When switched on, this pump enables the dispensing or conveying of rinse aid liquid from boiler 200 to dispensing devices 111b and 111d, while when the rinse pump 195a is switched off, no rinse fluid is dispensed to the dispensing devices.

[0071] Fig. 2 Figure 1 shows a section of an embodiment of a dishwasher 1 according to the invention, as well as two cartridges 2 according to the invention, i.e., a first cartridge 2a and a second cartridge 2b, each of which can be filled with a treatment agent for one or more washing cycles of the dishwasher. The dishwasher 1 comprises a docking unit 120 for docking the two cartridges 2a and 2b. The docking unit 120 comprises a first docking section 120a for docking the first cartridge 2a and a second docking section 120b for docking the second cartridge 2b, wherein in Fig. 2 only the second docking section 120b is visible. The dishwasher 1 further comprises a first connection unit 130a for directly or indirectly connecting the first cartridge 2a docked to the docking unit 120 to one or more dispensing devices 111a-d in a wash chamber 110 of the dishwasher, a wash tank 180 or a boiler 190 of the dishwasher 1, as well as a second connection unit 130b for directly or indirectly connecting the second cartridge 2b docked to the docking unit 120 to the one or more dispensing devices 111a-d, the wash tank 180 or the boiler 190, wherein in Fig. 2 Only the second connection unit 130b is visible. The first connection unit 130a and the second connection unit 130b are each designed as a pin that pierces a membrane of the respective cartridge 2a or 2b, or actuates a check valve of the respective cartridge 2a or 2b, in order to connect the respective cartridge 2a or 2b to the one or more dispensing devices 111a-d, the rinsing tank 180, or the boiler 190.

[0072] The dishwasher 1 further comprises a housing 140 with a hinged unit 142, wherein the hinged unit 142 is in Fig. 2 in an open position, which is described in more detail below. The first cartridge 2a is in Fig. 2 The first cartridge is already docked at docking section 130a of docking unit 130, while the second cartridge 2b is not yet docked at docking section 130b. The arrow in Fig. 2 However, this clarifies that a user inserts the second cartridge 2b into the dishwasher 1 by docking the second cartridge 2b onto the second docking section 130b of the docking unit 130. In this embodiment, the first cartridge 2a and the second cartridge 2b have essentially the same shape, size, and capacity for the respective treatment agent.

[0073] Fig. 3 Figure 1 shows a perspective view of a section of dishwasher 1, in particular the docking unit 120 with the two docking sections 120a and 120b, as well as the two cartridges 2a and 2b. The housing 140 of dishwasher 1 has been omitted from this view to better illustrate the docking unit 120 and the two cartridges 2a and 2b. Also in Fig. 3 The first cartridge 2a is already docked to the second docking section 120b of the docking unit 120, while the second cartridge 2b is not yet docked to the second docking section 130b of the docking unit 130. The vertical arrow illustrates the insertion direction 3 of each of the two cartridges 2a, 2b into the dishwasher 1 and the discharge direction 4 of the treatment agent from each of the two cartridges 2a, 2b into the dishwasher 1. In this embodiment, the insertion direction 3 is parallel to the discharge direction 4, but this is not necessarily the case. The insertion direction 3 can also form an angle with the discharge direction 4, which is preferably greater than 0° and less than or equal to 90°.

[0074] Fig. 4a bis Fig. 4c Figures 1 and 2 each show a schematic view of an embodiment of the dishwasher 1 according to the invention with a cartridge 2 according to the invention. In this embodiment, the docking unit 120 is designed as a receiving unit 120 for receiving the cartridge 2. The cartridge 2 can be inserted into the receiving unit 120, so that the receiving unit 120 encloses the inserted cartridge 2 from several sides by respective wall sections of the receiving unit 120. Furthermore, in this embodiment, the docking unit 120 is arranged to be movable back and forth relative to the wash chamber 110 between a docking position for docking the cartridge 2 and an operating position for connecting, by means of the connection unit 130, the docked cartridge 2 to the one or more dispensing devices 111a-d, the wash tank 180, or the boiler 190, wherein the operating position differs from the docking position. Fig. 4a bis Fig. 4c The housing 140 of the dishwasher 1 comprises a housing opening 141 for inserting the cartridge 2 into the dishwasher 1 and a hinged unit 142. The hinged unit 142 is arranged to be movable back and forth between an open position for opening the housing opening 141 and a closed position for closing the housing opening 141. The hinged unit 142 is connected to the docking unit 120 such that when the hinged unit 142 is in the open position, the docking unit 120 is in the docking position, and when the hinged unit 142 is in the closed position, the docking unit 120 is in the operating position. Furthermore, they show Fig. 4a bis Fig. 4c The connection unit 130 is for connecting the cartridge 2 docked to the docking unit 120 to the one or more dispensing devices 111a-d, the rinsing tank 180 or the boiler 190. The connection unit 130 is designed as a pin that pierces a diaphragm of the cartridge 2 or actuates a check valve of the cartridge 2 in order to connect the cartridge 2 to the one or more dispensing devices 111a-d, the rinsing tank 180 or the boiler 190.

[0075] In particular, Fig. 4a This represents a state of the dishwasher in which the hinged unit 142 is in the open position and the docking unit 120 is in the docking position. In the docking position, the docking unit 120 is at least partially outside the housing opening 141 and is therefore easily accessible to the user. The arrow in Fig. 4a indicates that a user inserts the cartridge 2 into the dishwasher by docking and / or snapping or locking the cartridge 2 into the docking position on the docking unit 120.

[0076] Fig. 4b represents a state in which the folding unit 142 is still in the open position and the docking unit 120 is still in the docking position. However, in Fig. 4b Cartridge 2 is already docked to docking unit 120. The arrow in Fig. 4b indicates that the folding unit 142 is now moved from the open position to the closed position, so that the docking unit 120 is moved from the docking position to the operating position and the docked cartridge 2 is conveyed through the housing opening 141 into the interior of the dishwasher 1.

[0077] Fig. 4c This finally represents a state in which the hinged unit 142 is in the closed position and the docking unit is in the operating position. The docking unit 120, the connection unit 130, and the cartridge 2 are now completely inside the dishwasher and are protected from the outside by the housing 140 and the hinged unit 142 in the closed position. In this embodiment, the cartridge 2 is automatically connected to the one or more dispensing devices 111a-d, the wash tank 180, or the boiler 190 via the connection unit 130 when the docking unit 120 is in the operating position. Therefore, in Fig. 4c The cartridge 2 is already connected to the one or more dispensing devices 111a-d, the wash tank 180, or the boiler 190 by means of the connection unit 120. In this state, the treatment agent can flow from the cartridge 2 to the one or more dispensing devices 111a-d or into the wash tank 180, the boiler 190, or a reservoir 150 for receiving the treatment agent, as described below, in order to be used for one or more washing cycles of the dishwasher 1.

[0078] Fig. 5 Figure 1 shows a schematic view of an embodiment of the dishwasher 1 according to the invention with a cartridge 2 according to the invention, wherein the dishwasher 1 comprises a reservoir 150 for receiving the treatment agent from the cartridge 2 and for dispensing the treatment agent to the one or more dispensing devices 111a-d or the wash tank 180 or the boiler 190. The reservoir 150 includes a sensor 151 for determining the quantity of treatment agent in the reservoir 150. The dishwasher 1 can issue a warning signal if the quantity of treatment agent in the reservoir 150, as determined by the sensor 151, falls below a first minimum value. The dishwasher 1 further comprises a valve 160 and a control unit.Valve 160 is configured such that, i) when valve 160 is open, the treatment agent can flow from cartridge 2 into reservoir 150, and ii) when valve 160 is closed, the treatment agent cannot flow from cartridge 2 into reservoir 150. Furthermore, control unit 170 is configured to open and close valve 160 based on the quantity of treatment agent in reservoir 150 as determined by sensor 151. In particular, control unit 170 can be configured to open valve 160 when the quantity of treatment agent in reservoir 150, as determined by sensor 151, falls below a second minimum value, which may be greater than the first minimum value.Furthermore, the control unit 170 can be configured to close the valve 160 when the quantity of the treatment agent in the reservoir 150, as determined by the sensor 151, exceeds a maximum value, where the maximum value may be greater than the first minimum value and / or greater than the second minimum value.

[0079] Fig. 6a bis Fig. 7b Figure 1 shows an embodiment of the dishwasher 1 with a first docking section 120a of the docking unit 120, to which a first cartridge 2a can be docked, and a second docking section 120b of the docking unit 120, to which a second cartridge 2b can be docked. Figure 2 shows in more detail Fig. 6a a side view of the first docking section 10a, to which the first cartridge 2a is docked, Fig. 6b shows a side view of the second docking section 120b, to which the second cartridge 2b is docked, Fig. 7a shows a top view of the first cartridge 2a and the first docking section 120a along the cross-sectional area AA. Fig. 6a , and Fig. 7b shows a top view of the second cartridge 2b and the second docking section 120b along the cross-sectional area BB. Fig. 6b Conversely, this corresponds to... Fig. 6a a side view of the first docking section 120a along the cross-sectional area CC from Fig. 7a , while Fig. 6b a side view of the second docking section 120b along the cross-sectional area DD from Fig. 7b corresponds.

[0080] In this embodiment, the first cartridge 2a cannot be docked to the second docking section 120b and the second cartridge 2b cannot be docked to the first docking section 120a, as described in more detail below.

[0081] The first docking section 120a comprises a first identification and locking segment 121a, and the first cartridge 2a comprises a first counter-locking segment 211a and a third counter-locking segment 211c. These segments are configured such that the first identification and locking segment 121a can lock into the first counter-locking segment 211a and the third counter-locking segment 211c, respectively. The first identification and locking segment 121a is specifically configured as a first projection 121a of the first docking section 120a, while the first counter-locking segment 211a and the third counter-locking segment 211c are each configured as a first recess 211a and a third recess 211c, respectively, of a first cartridge-side closure part 210a of the first cartridge 2a.The first identification and locking segment 121a forms a first machine-side locking part which, as described above, forms a first closure, specifically a first locking closure, with the first cartridge-side locking part 210a.

[0082] The size and shape of the first recess 211a is identical or nearly identical to the size and shape of the third recess 211c, and the size and shape of the projection 121a corresponds to the size and shape of these two recesses 211a and 211c, so that the projection 121a can engage in either of the two recesses 211a and 211c. Furthermore, the first recess 211a and the third recess 211c are spaced apart from each other in the insertion direction 3 of the first cartridge 2a into the dishwasher 1. Therefore, when a user inserts the first cartridge 2a into the dishwasher 1, the projection 121a initially engages in the first recess 211a, thus identifying or recognizing the first cartridge 2a.When the user then applies a force to the cartridge in the insertion direction, the first projection 121a disengages from the first recess 211a and engages in the third recess 211c, so that the identified first cartridge 2a is docked to the first docking section 120a.

[0083] The same applies to the second docking section 120b or the second cartridge 2b; that is, the second docking section 120b comprises a second identification and locking segment 121b, and the second cartridge 2b comprises a second counter-locking segment 211b and a fourth counter-locking segment 211d. These segments are configured such that the second identification and locking segment 121b can lock into the second counter-locking segment 211b and the fourth counter-locking segment 211d, respectively. The second identification and locking segment 121b is specifically configured as a second projection 121b of the second docking section 120b, while the second counter-locking segment 211b and the fourth counter-locking segment 211d are each configured as a second recess 211b and a fourth recess 211d, respectively, of a second cartridge-side closure part 210b of the second cartridge 2b.The second identification and locking segment 121b forms a second machine-side locking part which, as described above, forms a second closure, specifically a second locking closure, with the second cartridge-side locking part 210b.

[0084] The size and shape of the second recess 211b is identical or nearly identical to the size and shape of the fourth recess 211d, and the size and shape of the projection 121b corresponds to the size and shape of these two recesses 211b and 211d, so that the projection 121b can engage in either of these two recesses 211b and 211d. Furthermore, the second recess 211b and the fourth recess 211d are spaced apart from each other in the insertion direction 3 of the second cartridge 2b into the dishwasher 1. Therefore, when a user inserts the second cartridge 2b into the dishwasher 1, the projection 121b first engages in the second recess 211b, thus identifying or recognizing the second cartridge 2b.When the user then applies a force to the cartridge in the insertion direction, the second projection 121b disengages from the second recess 211b and engages in the fourth recess 211d, so that the identified second cartridge 2b is docked to the second docking section 120b.

[0085] However, the size and / or shape of the first projection 121a differs from the size and / or shape of the second projection 121b. Likewise, the size and / or shape of the first recess 211a differs from the size and / or shape of the second recess 211b, and the size and / or shape of the third recess 211c differs from the size and / or shape of the fourth recess 211c. This ensures that the first projection 121a cannot engage with either the second recess 211b or the fourth recess 211d, and that the second projection 121b cannot engage with either the first recess 211a or the third recess 211c.Therefore, if the user attempts to dock the first cartridge 2a to the second docking section 120b, this fails because the second projection 121b cannot engage in the first recess 211a of the first cartridge 2a, and thus the first cartridge 2a cannot be identified by the second docking section 120b. Consequently, the second projection 121b also cannot engage in the third recess 211a of the first cartridge 2a, and therefore the first cartridge 2a cannot be docked to the second docking section 120b. For analogous reasons, the second cartridge 2b cannot be docked to the first docking section 120a.

[0086] The shapes and sizes of the various protrusions and recesses are in Fig. 6a bis 6b This is illustrated by example. In particular, it is shown that Fig. 6a It is evident that the first recess 211a and the third recess 211c have the same or substantially the same height, i.e., the same or substantially the same dimension along the insertion direction 3 of the first cartridge 2a, and that the height of the first projection 121a corresponds to the height of the first recess 211a or the third recess 211c (or as in Fig. 6a (only minimally smaller), so that the first projection 121a can snap into the first recess 211a and into the third recess 211c. In Fig. 6a The first projection 121a has already engaged in the third recess 211c, so that the first cartridge 2a is docked to the first docking section 120a. Furthermore, Fig. 7a It is evident that a dimension of the first projection 121a is perpendicular to the insertion direction 3 of the first cartridge 2a, more precisely an angular dimension of the first projection 121a in the cross-sectional area AA. Fig. 6a , corresponds to an angular dimension of the third recess 211c (or as in Fig. 7a (only minimally smaller), so that the first projection 121a can snap into the third recess 211c. Likewise, the angular dimension of the first projection 121a in the cross-sectional area AA corresponds to an angular dimension of the first recess 211a (which, however, is in Fig. 7a (not visible), so that the first projection 121a can also snap into the first recess 211a.

[0087] Analog is from Fig. 6b It is evident that the second recess 211b and the fourth recess 211d have the same or substantially the same height, i.e., the same or substantially the same dimension along the insertion direction 3 of the second cartridge 2b, and that the height of the second projection 121b corresponds to the height of the second recess 211b or the fourth recess 211d (or as in Fig. 6b (only minimally smaller), so that the second projection 121b can snap into the second recess 211b and into the fourth recess 211d. In Fig. 6b The second projection 121b has already engaged in the fourth recess 211d, so that the second cartridge 2b is docked to the second docking section 120b. Furthermore, it is Fig. 7b It is evident that a dimension of the second projection 121b is perpendicular to the insertion direction 3 of the second cartridge 2b, more precisely an angular dimension of the second projection 121b in the cross-sectional area BB. Fig. 6b , corresponds to an angular dimension of the fourth recess 211d (or as in Fig. 7b (only minimally smaller), so that the second projection 121b can snap into the fourth recess 211d. Likewise, the angular dimension of the second projection 121b in the cross-sectional area BB corresponds to an angular dimension of the second recess 211b (which, however, is in Fig. 7b (not visible), so that the second projection 121b can also snap into the second recess 211b.

[0088] However, this is from Fig. 6a and 5b, it is evident that the height of the second projection 121b is greater than the height of the first projection 121a and, in particular, greater than the height of the first recess 211a and the third recess 211c. Therefore, the second projection 121b cannot engage in either the first recess 211a or the third recess 211c. Therefore, the second cartridge 2b cannot be docked to the first docking section 120a.

[0089] Furthermore, it is from Fig. 7a and 6bIt is evident that the angular dimension of the first projection 121a is larger than the angular dimension of the second projection 121b and, in particular, larger than the angular dimension of the fourth recess 211d. Likewise, the angular dimension of the first projection 121a is larger than the angular dimension of the second recess 211b (although the second recess 211b in Fig. 7b (is not visible). Therefore, the first projection 121a cannot engage in either the second recess 211b or the fourth recess 211d. Therefore, the first cartridge 2a cannot be docked to the second docking section 120b.

[0090] Finally, in Fig. 6b A drainage surface 230 of the second cartridge 2b is also visible. The drainage surface 230 of the second cartridge 2b is inclined at an angle α with respect to the discharge direction 4 of the treatment agent from the second cartridge 2, where α is greater than 0° and less than 90°. As can be seen from Fig. 6b As can be seen, in the present embodiment α is approximately or exactly 80°, so that the drain surface 230 is inclined at an angle β = 90° - α relative to the horizontal, lower boundary surface of the second cartridge 2b, where β is approximately or exactly 10°. The same applies to the drain surface 230 of the first cartridge 2a, which in Fig. 6a can be seen.

[0091] Furthermore, the following aspects will be revealed: Aspect 1 Dishwasher (1) comprising: a wash chamber (110) with one or more dispensing devices (111a-d); a docking unit (120) for docking one or more cartridges (2) for one or more treatment agents; and one or more connection units (130), each for directly or indirectly connecting a corresponding cartridge (2) docked to the docking unit (120) to the one or more dispensing devices (111a-d) or a wash tank (180) or a boiler (190) of the dishwasher (1) for using the one or more treatment agents for one or more wash cycles of the dishwasher (1). Aspect 2 Dishwasher (1) according to Aspect 1, wherein the docking unit (120) comprises a first docking section (120a) for docking a first cartridge (2a) and a second docking section (120b) for docking a second cartridge (2b),wherein the first cartridge (2a) cannot be docked to the second docking section (120b) and / or the second cartridge (2b) cannot be docked to the first docking section (120a). Aspect 3 Dishwasher (1) according to Aspect 1 or 2, wherein the first docking section (120a) comprises a first identification and locking segment (121a), i) for locking into a first counter-locking segment (211a) of the first cartridge (2a) for identifying the first cartridge (2a), and ii) for locking into a third counter-locking segment (211c) of the first cartridge (2a) for docking the identified first cartridge (2a) to the first docking section (120a), wherein the second docking section (120b) comprises a second identification and locking segment (121b), i) for locking into a second counter-locking segment (211b) of the second cartridge (2b) for identifying the second cartridge (2b),and ii) for engaging a fourth counter-locking segment (211d) of the second cartridge (2b) for docking the identified second cartridge (2b) to the second docking section (120b), wherein a size and / or a shape and / or a material of the first identification and locking segment (121a) differs from a size and / or a shape and / or a material of the second identification and locking segment (121b). Aspect 4 Dishwasher (1) according to Aspect 1, wherein the docking unit (120) is configured for docking a plurality of identical cartridges (2). Aspect 5 Dishwasher (1) according to any one of Aspects 1 to 4, wherein the docking unit (120) is positioned relative to the wash chamber (110) between a docking position for docking the one or more cartridges (2) and an operating position for connecting, by means of the one or more connection units (130),the docked one or more cartridges (2) is arranged to be movable back and forth to the one or more dispensing devices (111a-d) or the wash tank (180) or the boiler (190), wherein the operating position differs from the docking position. Aspect 6 Dishwasher (1) according to Aspect 5, wherein, when the docking unit (120) is in the operating position, at least one connection unit (130) is arranged to be movable back and forth relative to the docking unit (120) between a first position and a second position, such that: when the connection unit (130) is in the first position, the corresponding cartridge (2) is not connected to the one or more dispensing devices (111a-d) or the wash tank (180) or the boiler (190), and when the connection unit (130) is in the second position,the corresponding cartridge (2) is connected to the one or more dispensing devices (111a-d) or the rinsing tank (180) or the boiler (190). Aspect 7 Dishwasher (1) according to aspect 5 or 6, which further comprises a housing (140) with a housing opening (141) for inserting the one or more cartridges (2) into the dishwasher (1) and an opening and closing unit (142), wherein the opening and closing unit (142) is arranged to be movable back and forth between an opening position for opening the housing opening (141) and a closing position for closing the housing opening (141), and wherein the opening and closing unit (142) is connected to the docking unit (120) such that when the opening and closing unit (142) is in the opening position, the docking unit (120) is in the docking position, and when the opening and closing unit (142) is in the closing position,the docking unit (120) is in the operating position. Aspect 8 Dishwasher (1) according to one of Aspects 1 to 7, comprising at least one reservoir (150) for receiving the treatment agent of at least one cartridge (2) and for dispensing the treatment agent to the one or more dispensing devices (111a-d) or the wash tank (180) or the boiler (190), wherein the reservoir (150) comprises a sensor (151) for determining a quantity of the treatment agent in the reservoir (150). Aspect 9 Dishwasher (1) according to Aspect 8, which is configured to issue a warning signal when the quantity of the treatment agent in the reservoir (150) determined by the sensor (151) falls below a first minimum value. Aspect 10 Dishwasher (1) according to aspect 8 or 9, which further comprises a valve (160) and a control unit (170), wherein the valve (160) is configured such that, i) when the valve (160) is open,a) the treatment agent can flow from the cartridge (2) into the reservoir (150), and ii) when the valve (160) is closed, the treatment agent cannot flow from the cartridge (2) into the reservoir (150), and wherein the control unit (170) is configured to open and close the valve (160) based on the quantity of treatment agent in the reservoir (150) determined by the sensor (151). Aspect 11 Dishwasher (1) according to Aspect 10, wherein the control unit (170) is configured to open the valve (160) when the quantity of treatment agent in the reservoir (150) determined by the sensor (151) falls below a second minimum value, the second minimum value preferably being greater than the first minimum value. Aspect 12 Dishwasher (1) according to Aspect 10 or 11, wherein the control unit (170) is configured to close the valve (160),when the quantity of the treatment agent in the reservoir (150) determined by the sensor (151) exceeds a maximum value, wherein the maximum value is preferably greater than the first minimum value and / or greater than the second minimum value. Aspect 13 System of several cartridges (2) for one or more treatment agents for a dishwasher (1) according to one of aspects 1 to 12, wherein the several cartridges (2) comprise at least a first cartridge (2a) and a second cartridge (2b), wherein the first cartridge (2a) comprises a first counter-locking segment (211a) for locking the first identification and locking segment (121a), wherein the second cartridge (2b) comprises a second counter-locking segment (211b) for locking the second identification and locking segment (121a),and wherein a size and / or a shape and / or a material of the first counter-latch segment (211a) differs from a size and / or a shape and / or a material of the second counter-latch segment (211b). Aspect 14 System of multiple cartridges (2) according to aspect 13, wherein the first cartridge (2a) further comprises a third locking segment (211c) for locking the first identification and locking segment (121a), wherein a size and / or a shape and / or a material of the third locking segment (211c) is identical to a size and / or a shape and / or a material of the first locking segment (211a), wherein the third locking segment (211a) and the first locking segment (211c) are spaced apart from each other in an insertion direction (3) of the first cartridge (2a) into the dishwasher (1), and wherein the second cartridge (2b) further comprises a fourth locking segment (211d) for locking the second identification and locking segment (121b),wherein a size and / or a shape and / or a material of the fourth locking segment (211d) is identical to a size and / or a shape and / or a material of the second locking segment (211b), wherein the fourth locking segment (211b) and the second locking segment (211d) are spaced apart from each other in an insertion direction (3) of the second cartridge (2b) into the dishwasher (1). Aspect 15 Dishwashing system comprising: the dishwasher (1) according to any one of Aspects 1 to 12; and the one or more cartridges (2), preferably the system of multiple cartridges (2) according to any one of Claims 13 or 14. Aspect 16 Dishwashing system according to Aspect 15, wherein the multiple cartridges (2) each have the same shape and / or size and / or maximum capacity for the respective treatment agent. Aspect 17 Dishwashing system according to any one of Aspects 15 or 16,wherein at least one cartridge (2) of the one or more cartridges (2) comprises an outlet opening (220) and one or more drain surfaces (230) which are designed such that, when the cartridge (2) is connected to the one or more dispensing devices (111a-d) or the rinsing tank (180) or the boiler (190) by means of the corresponding connection unit (130), the treatment agent can flow from the cartridge (2) along the one or more drain surfaces (230) towards the outlet opening (220) and exit the cartridge (2) through the outlet opening (220) to flow to the one or more dispensing devices (111a-d) or into the rinsing tank (180) or the boiler (190) or the reservoir (150),wherein at least one drain surface (230) or each drain surface (230) is inclined at an angle greater than 0° and less than 90° with respect to a discharge direction (4) of the treatment agent from the cartridge (2). Aspect 18 Cartridge (2) for a treatment agent for a dishwasher (1) according to one of aspects 1 to 12, wherein the cartridge (2) has a maximum capacity for the treatment agent which is less than or equal to 0.5 liters, 1 liter, 2 liters, 5 liters, 10 liters or 20 liters and is preferably within the "Limited Quantities" regulation for the transport of hazardous substances.

[0092] The features disclosed in the foregoing description, figures and claims can be important for the realization of the invention in its various embodiments, both individually and in any combination. Liste der Bezugszeichen

[0093] 1 Dishwasher 2 Cartridge 2 First cartridge 2 Second cartridge 3 Cartridge insertion direction 4 Treatment agent discharge direction 110 Wash chamber 111 First dispensing device 111 Second dispensing device 111 Third dispensing device 111 Fourth dispensing device 112 Wash basket 120 Docking unit 120 First docking section 120 Second docking section 121 First identification and locking segment, first projection 121 Second identification and locking segment,second projection 130a first connection unit 130b second connection unit 140 housing 141 housing opening 142 opening and closing unit 150 reservoir 151 sensor 160 valve[s] 170 control unit 180 rinse tank 181 heating device 182 filter system 183 first inlet line 183a first dosing pump 185 first outlet line 185a wash pump 190 boiler 191 heating device 193 second inlet line 193a second dosing pump 195 second outlet line 195a rinse pump 210a first cartridge-side sealing part 210b second cartridge-side sealing part 211a first locking segment, first recess 211b second locking segment, second recess 211c third locking segment, third recess 211d fourth locking segment, fourth recess 220 outlet opening 230 drain surface , 310 Wastewater pipe 310a Drain pump 330 Drinking water pipe 340 Solenoid valve 350 Water safety device

Claims

1. Dishwashing system comprising: a dishwasher (1) and one or more cartridges (2), wherein the dishwasher (1) comprises: a wash chamber (110) with one or more dispensing devices (111a-d); a docking unit (120) for docking one or more cartridges (2) for one or more treatment agents; and one or more connection units (130), each for directly or indirectly connecting a corresponding cartridge (2) docked to the docking unit (120) to the one or more dispensing devices (111a-d) or a wash tank (180) or a boiler (190) of the dishwasher (1) for using the one or more treatment agents for one or more wash cycles of the dishwasher (1), and wherein at least one cartridge (2) of the one or more cartridges (2) comprises an outlet opening (220) and one or more drain surfaces (230) configured such that,When the cartridge (2) is connected to the one or more dispensing devices (111a-d) or the rinsing tank (180) or the boiler (190) by means of the corresponding connection unit (130), the treatment agent can flow from the cartridge (2) along the one or more drainage surfaces (230) towards the outlet opening (220) and exit the cartridge (2) through the outlet opening (220) to flow to the one or more dispensing devices (111a-d) or into the rinsing tank (180) or the boiler (190) or the reservoir (150), wherein at least one drainage surface (230) or each drainage surface (230) is inclined at an angle greater than 0° and less than 90° with respect to an outlet direction (4) of the treatment agent from the cartridge (2).

2. Dishwashing system according to claim 1, wherein the docking unit (120) comprises a first docking section (120a) for docking a first cartridge (2a) and a second docking section (120b) for docking a second cartridge (2b), wherein the first cartridge (2a) is not dockable to the second docking section (120b) and / or the second cartridge (2b) is not dockable to the first docking section (120a).

3. Dishwashing system according to claim 1 or 2, wherein the first docking section (120a) comprises a first identification and locking segment (121a) i) for locking into a first counter-locking segment (211a) of the first cartridge (2a) for identifying the first cartridge (2a), and ii) for locking into a third counter-locking segment (211c) of the first cartridge (2a) for docking the identified first cartridge (2a) to the first docking section (120a), wherein the second docking section (120b) comprises a second identification and locking segment (121b) i) for locking into a second counter-locking segment (211b) of the second cartridge (2b) for identifying the second cartridge (2b), and ii) for locking into a fourth counter-locking segment (211d) of the second cartridge (2b) for docking the identified second Cartridge (2b) to the second docking section (120b),and wherein a size and / or a shape and / or a material of the first identification and resting segment (121a) differs from a size and / or a shape and / or a material of the second identification and resting segment (121b).

4. Dishwashing system according to claim 1, wherein the docking unit (120) is designed for docking a plurality of identical cartridges (2).

5. Dishwashing system according to one of claims 1 to 4, wherein the docking unit (120) is arranged to be movable back and forth relative to the washing chamber (110) between a docking position for docking the one or more cartridges (2) and an operating position for connecting, by means of the one or more connection units (130), the docked one or more cartridges (2) to the one or more dispensing devices (111a-d) or the washing tank (180) or the boiler (190), wherein the operating position differs from the docking position.

6. Dishwashing system according to claim 5, wherein, when the docking unit (120) is in the operating position, at least one connection unit (130) is arranged to be movable back and forth relative to the docking unit (120) between a first position and a second position, such that: when the connection unit (130) is in the first position, the corresponding cartridge (2) is not connected to the one or more dispensing devices (111a-d) or the wash tank (180) or the boiler (190), and when the connection unit (130) is in the second position, the corresponding cartridge (2) is connected to the one or more dispensing devices (111a-d) or the wash tank (180) or the boiler (190).

7. Dishwashing system according to claim 5 or 6, wherein the dishwasher further comprises a housing (140) with a housing opening (141) for inserting the one or more cartridges (2) into the dishwasher (1) and an opening and closing unit (142), wherein the opening and closing unit (142) is arranged to be movable back and forth between an opening position for opening the housing opening (141) and a closing position for closing the housing opening (141), and wherein the opening and closing unit (142) is connected to the docking unit (120) such that when the opening and closing unit (142) is in the opening position, the docking unit (120) is in the docking position, and when the opening and closing unit (142) is in the closing position, the docking unit (120) is in the operating position.

8. Dishwashing system according to one of claims 1 to 7, wherein the dishwasher comprises at least one reservoir (150) for receiving the treatment agent of at least one cartridge (2) and for dispensing the treatment agent to the one or more dispensing devices (111a-d) or the washing tank (180) or the boiler (190), wherein the reservoir (150) comprises a sensor (151) for determining a quantity of the treatment agent in the reservoir (150).

9. Dishwashing system according to claim 8, wherein the dishwasher is configured to issue a warning signal when the quantity of treatment agent in the reservoir (150) determined by the sensor (151) falls below a first minimum value.

10. Dishwashing system according to claim 8 or 9, wherein the dishwasher further comprises a valve (160) and a control unit (170), wherein the valve (160) is configured such that, i) when the valve (160) is open, the treatment agent can flow from the cartridge (2) into the reservoir (150), and ii) when the valve (160) is closed, the treatment agent cannot flow from the cartridge (2) into the reservoir (150), and wherein the control unit (170) is configured to open and close the valve (160) based on the amount of treatment agent in the reservoir (150) determined by the sensor (151).

11. Dishwashing system according to claim 10, wherein the control unit (170) is configured to open the valve (160) when the quantity of treatment agent in the reservoir (150) determined by the sensor (151) falls below a second minimum value, wherein the second minimum value is preferably greater than the first minimum value.

12. Dishwashing system according to claim 10 or 11, wherein the control unit (170) is configured to close the valve (160) when the quantity of treatment agent in the reservoir (150) determined by the sensor (151) exceeds a maximum value, wherein the maximum value is preferably greater than the first minimum value and / or greater than the second minimum value.

13. Dishwashing system according to one of the preceding claims, wherein the multiple cartridges (2) each have the same shape and / or size and / or maximum capacity for the respective treatment agent.

Images