Dishwasher in the form of a commercial utensil or dishwashing machine designed as a program-controlled automatic dishwasher

Abstract

The invention relates to a dishwasher (1) in the form of a commercial utensil or dishwashing machine designed as a program-controlled automatic dishwasher, which is configured as a hood-type or pass-through dishwasher, wherein the dishwasher (1) has a treatment chamber (2) with at least one washing system designed as a recirculation system for spraying washing liquid in the treatment chamber (2) as required and with at least one rinsing system for spraying rinse liquid in the treatment chamber (2) as required. The treatment chamber (2) has a first treatment zone (6) and at least one further, second treatment zone (7), wherein the at least two treatment zones (6, 7) are arranged one above the other, wherein each treatment zone (6, 7) is assigned its own rinsing system with a rinse pump (14.1, 14.2) and rinse nozzles (15.1, 15.2), and wherein at least some of the rinse nozzles (15.1, 15.2) are2), in particular at least part of the rinse nozzles (15.2) assigned to the at least one second treatment zone (7) are designed as fixed rinse nozzles with respect to the corresponding treatment zone.

Description

[0001] The invention relates to a dishwasher in the form of a commercial utensil or dishwashing machine designed as a programmer.

[0002] Programmable dishwashers are manually loaded and unloaded. These automated dishwashers (also known as box-type or batch dishwashers) can be pass-through dishwashers, hood-type warewashers, or front-loaders. Front-loaders can be undercounter machines, top-counter machines, or freestanding front-loaders.

[0003] A dishwasher designed as a programmable automatic machine typically has a treatment chamber for cleaning dishes. A wash tank is usually located below the treatment chamber, into which liquid from the treatment chamber can flow back by gravity. The wash tank contains wash liquid, which is usually water, to which detergent can be added if necessary.

[0004] A dishwasher designed as a programmable automatic dishwasher typically also includes a wash system with a wash pump, a pipe system connected to the wash pump, and a plurality of spray nozzles formed in at least one wash arm. The wash liquid in the wash tank can be pumped by the wash pump via the pipe system to the wash nozzles and sprayed onto the items to be cleaned by the wash nozzles in the treatment chamber. The sprayed wash liquid then flows back into the wash tank.

[0005] Such a dishwasher designed as a programmer is known, for example, from the document DE 10 2005 023 429 A1.

[0006] The document US 2 947 311 A relates to a flight conveyor dishwasher in which different treatment zones are arranged one behind the other in a horizontal direction, wherein a so-called splash guard can be provided between the individual treatment zones.

[0007] The (post-published) document DE 10 2015 203 129 B4 relates to a dishwasher in the form of a commercial utensil or dishwashing machine designed as a programmer, which is designed as a hood-type or pass-through dishwasher, wherein the dishwasher has a treatment chamber which is divided into a first treatment zone and a further, second treatment zone.

[0008] The document WO 2014 / 186182 A2 relates to a dishwasher designed as a programmable automatic machine with two treatment chambers arranged side by side and a zeolite drying system.

[0009] The document US 3 504 390 A relates to a flight conveyor dishwasher.

[0010] The term “washable items” as used herein includes, in particular, dishes, glasses, cutlery, cooking utensils, baking utensils and serving trays.

[0011] In particular, the invention relates to a dishwasher in the form of a commercial utensil or dishwashing machine designed as a programmer, which is designed as a hood-type or pass-through dishwasher, wherein the dishwasher has a treatment chamber with at least one washing system designed as a recirculation system.

[0012] Such dishwashers are used primarily (but not exclusively) in smaller dishwashing areas, such as smaller cafeterias, especially school cafeterias, or in the catering sector. A characteristic of such dishwashers is that they are used in dishwashing areas, where space is generally limited.

[0013] A commercial dishwasher designed as a programmable automatic machine, particularly a hood-type or pass-through dishwasher, differs from a domestic dishwasher in that a commercial dishwasher must be designed to allow program runs of between one and five minutes, depending on the selected treatment program, whereas domestic dishwashers typically have run times of up to 2.5 hours or more. Due to the short program durations required for commercial dishwashers, the technologies used in domestic dishwashers are generally not readily transferable to commercial dishwashers.

[0014] Commercial dishwashers designed as programmable automatic machines usually operate in two main process steps: a first step, which involves washing with a washing liquid, and a second step, which involves rinsing with heated fresh water and dosed rinse aid.

[0015] To perform these process steps, a commercial dishwasher designed as a programmable automatic machine is typically equipped with two independent fluid systems. One fluid system is a wash water circuit, which is responsible for washing the dishes, with the washing being carried out using recirculated water from the dishwasher's wash tank. The other fluid system is a fresh water system, which is responsible for the final rinse. The final rinse is carried out with fresh water, preferably with fresh water from a water heater. The fresh water is also collected from the dishwasher's wash tank after spraying.

[0016] The primary function of the final rinse is to remove any caustic soda from the washware. In addition, the rinse water flowing into the wash tank during the final rinse step serves to regenerate the wash water present in the wash tank.

[0017] Before fresh water is sprayed as rinse aid through the final rinse and thus fed into the wash tank of the dishwasher, an amount of wash liquid equal to the amount of fresh water is pumped out of the wash tank.

[0018] Commercial dishwashers designed as programmable automatic dishwashers are typically equipped with several programs. These programs differ primarily in the length of the wash cycle. The operator has the option of selecting a short wash program for lightly soiled items or a correspondingly longer wash program for heavily soiled items.

[0019] Commercial dishwashers designed as automatic programmers and for batch-wise loading and unloading of the treatment chamber with wash ware are primarily front-loading machines or pass-through rack machines. With front-loading machines, the wash ware is placed in a rack, and the loaded rack is placed through a front door into the treatment chamber of the dishwasher and removed again through the front door after cleaning. With pass-through rack machines, the loaded dish baskets are manually pushed into the treatment chamber from an inlet side and manually removed from the treatment chamber from an outlet side after the end of a wash program. Front-loading machines and pass-through rack machines contain only a single treatment chamber for treating the wash ware. Front-loading machines can be undercounter or overcounter machines.

[0020] Almost without exception, commercial dishwashers, which are designed as programmable automatic dishwashers and for batch loading and unloading of the treatment chamber with wash ware, are equipped with infeed and / or outfeed tables. Manual pre-cleaning and manual pre-washing of the dirty ware typically take place on the infeed side of the dishwasher. Furthermore, the dirty ware is loaded into special dish baskets here. The outfeed side is used for drying and unloading the dish baskets.

[0021] Especially in hood-type or rack-through dishwashers, the wash level is usually at the same height as the inlet and outlet tables. This allows the racks to be cleaned to be easily and ergonomically moved from the inlet table into the dishwasher and, once cleaning is complete, from the dishwasher to the outlet table.

[0022] The term "washing level" used herein refers to the horizontal plane on which the wash basket rests. In the treatment chamber of a dishwasher, the wash level is typically defined by a guide system, particularly guide rails, which accommodates a wash basket pushed through the treatment chamber from an inlet table provided on the inlet side of the machine.

[0023] Commercial automatic dishwashers, especially those designed as hood-type dishwashers, are designed to clean large quantities of dishes in the shortest possible time. For example, in current hood-type dishwashers, the duration of a preset program, which is typically used for normally soiled dishes such as plates, bowls, cups, and glasses, is only approximately 60 to 80 seconds. This results in a theoretical capacity of up to 45 to 60 racks per hour.

[0024] However, depending on the items being washed and their degree of soiling, it may be necessary to select a treatment program with a longer duration to ensure a perfect cleaning result.

[0025] In this context, it is known from the prior art that commercial automatic dishwashers, for example, have a special cutlery treatment program (intensive treatment program) to improve the cleaning results, especially for cutlery. Such an intensive treatment program lasts significantly longer, for example, approximately 360 seconds, than the 60 to 80 seconds of the standard treatment program. This clearly shows that the machine's capacity is significantly reduced when the intensive treatment program is selected, as the treatment chamber is occupied for significantly longer than would be the case with a standard treatment program.

[0026] In practice, this means that special treatment programs, which are usually provided as an alternative to the standard treatment program, are rarely selected by the dishwasher operator, despite improved washing performance, because the corresponding program duration is considered too long, particularly during peak times, i.e., when there is a higher volume of washware. Instead, heavily soiled washware (especially cutlery and GN containers) are often also treated with the standard treatment program, and the poor washing performance is compensated for by additional manual steps, such as manually pre-washing heavily soiled GN containers or separately pre-soaking cutlery.

[0027] For heavily soiled items, such as pots and pans, the cycle length must be increased accordingly to achieve acceptable cleaning results. Typically, hood-type or pass-through dishwashers extend program run times to up to 10 minutes to ensure hygienically clean heavily soiled items, especially pots and pans with burnt-on food residue.

[0028] During these extended cycle times, the dishwasher cannot be used to clean less soiled items, such as plates, cups, cutlery, or glasses. In other words, the dishwasher is blocked for a relatively long time when cleaning heavily soiled items, especially pots and pans, which often causes problems in smaller kitchens, as the resulting dirty dishes cannot be cleaned or processed further during this time.

[0029] In practice, especially during peak times, the dishwasher is only used to clean less soiled items, such as plates, cups and glasses, while heavily soiled items (especially pots and pans) are cleaned manually to prevent the dishwasher from becoming blocked for too long due to the longer cycle times required.

[0030] Accordingly, the present invention is based on the object of further developing a commercial utensil or dishwashing machine, which is generally known from the prior art and is designed as a hood-type or pass-through dishwasher, in such a way that even during peak times in dishwashing areas, bottlenecks in the cleaning of the dishes to be washed do not occur. In particular, a solution is to be provided with which work processes in dishwashing areas can be simplified and optimized while simultaneously saving resources (energy, water, and chemicals).

[0031] A further objective is to further develop a commercial utensil or dishwashing machine, designed as a hood-type or pass-through dishwasher, so that the machine's capacity can be improved even when a treatment program is selected that results in a longer cycle time than would be the case with a standard treatment program. In particular, resources (energy, water, and chemicals) should be saved at the same time.

[0032] The present invention relates to a dishwasher according to independent claim 1, wherein advantageous developments of the dishwasher according to the invention are specified in the corresponding dependent claims.

[0033] Accordingly, a dishwasher in the form of a commercial utensil or dishwashing machine designed as a programmable automatic dishwasher is proposed, wherein the dishwasher is designed as a hood-type or pass-through dishwasher and wherein the dishwasher has a treatment chamber with at least one washing system designed as a recirculation system. According to the invention, the treatment chamber has a first treatment zone and at least one further, second treatment zone.

[0034] In this context, it is conceivable to design the two treatment zones spatially, i.e., hermetically, separated from each other. This embodiment has the particular advantage that different treatment programs can be selected for the corresponding treatment zones of the treatment chamber. In this context, it is conceivable, for example, that in one treatment zone, the washware is treated according to a standard treatment program, while in another treatment zone, spatially separated from the first treatment zone, the washware is treated according to an intensive treatment program.

[0035] On the other hand, the present invention is not limited to automated programs in which the at least two treatment zones of the treatment chamber are spatially (hermetically) separated from one another by means of a partition. Rather, according to a further aspect of the present invention, the two treatment zones are formed within the common treatment chamber, and in particular, no hermetic separation is provided between the at least two treatment zones.

[0036] Even in embodiments where the at least two treatment zones are not hermetically separated from one another, it is of course also conceivable for the dishes to be treated in the different treatment zones with different exposure times. This is particularly possible if the same treatment program is selected for both treatment zones. In this context, it is conceivable, for example, for the dishes to remain in one of the two treatment zones for only one program cycle, while in the other treatment zone the dishes remain for more than one program cycle, as a result of which the exposure time can be multiplied accordingly.

[0037] The solution according to the invention provides for the at least two treatment zones to be arranged one above the other. In this context, it is particularly suitable for at least one of the at least two treatment zones, and preferably each of the at least two treatment zones, to be designed to accommodate a washing basket containing the items to be treated in the respective treatment zone, such that the lower region of the washing basket, over which the washing basket rests, lies in a predetermined or definable horizontal washing plane.

[0038] In a preferred embodiment of the dishwasher according to the invention, the first treatment zone can be closed via a vertically pivoting or sliding hood, and the at least one second treatment zone can be closed via a door designed separately from the hood. In particular, it is provided that the first and at least one second treatment zones are arranged one above the other.

[0039] It has proven advantageous to design the first treatment zone as the main treatment zone and the at least one second treatment zone as an auxiliary treatment zone. The dimensions and cleaning capacity of the main treatment zone (first treatment zone) and the dimensions and cleaning capacity of the auxiliary treatment zone (second treatment zone) are preferably adapted to the types of wash ware typically encountered and to be cleaned in dishwashing areas (such as dishes, cutlery, glasses and pots), the quantity of wash ware typically encountered per unit of time for each type of wash ware and / or the degree of soiling of the wash ware encountered per unit of time in such a way that, even during peak times, all of the wash ware can be cleaned as quickly as possible during dishwasher operation, even during peak times.

[0040] In this context, studies in various dishwashing areas have shown that it is advantageous if the first treatment zone (main treatment zone) has a load volume that is two to four times larger than the load volume of at least one second treatment zone. The first treatment zone is particularly suitable for cleaning lightly soiled dishes, which in practice are processed much more frequently per unit of time than heavily soiled dishes.

[0041] In a preferred embodiment of the dishwasher, the effectively usable load volume of the first treatment zone is between 60 and 180 liters, preferably between 80 and 150 liters, and even more preferably approximately 120 liters. This ensures that the cleaning capacity of the first treatment zone, i.e., the quantity of washware units that can be cleaned per unit of time in the first treatment zone, corresponds to the cleaning capacity of a conventional hood-type or pass-through dishwasher known from the prior art and having only a single treatment zone.

[0042] With regard to the effectively usable loading volume of the at least one second treatment zone, it has proven advantageous if this loading volume is between 25 and 75 liters, and preferably between 30 and 50 liters. This ensures that even heavily soiled items can be cleaned effectively and promptly, even during peak times in dishwashing areas.

[0043] To ensure that the dishwasher optimally fits into the usual workflow in a dishwashing area, it is preferable for the base area of ​​the first treatment zone to be sized to match the base area of ​​a dishwashing basket, and in particular, to have a base area of ​​600 mm x 500 mm, 500 mm x 500 mm, or 400 mm x 400 mm. This allows the items loaded into the dishwashing baskets to be treated in batches in the first treatment zone.

[0044] In a preferred embodiment of the dishwasher according to the invention, the first treatment zone can be closed by a vertically pivoting or displaceable hood, wherein the hood is designed to be pivotable or displaceable vertically upwards by at least 300 mm, preferably by at least 400 mm. This ensures a sufficiently high insertion height so that even relatively large items of washware, such as trays, can be easily inserted and removed from the first treatment zone. It is also advantageous in this context if the first treatment zone has an effective height for cleaning washware of at least 400 mm.

[0045] With regard to the internal dimensions of the at least one second treatment zone, it is advantageous if these are adapted to the dimensions of commonly used pans and / or pots, since this type of dishware is generally the most heavily soiled. According to one embodiment of the dishwasher according to the invention, the at least one second treatment zone has an effective height for cleaning dishes of at least 120 mm and preferably of at least 150 mm.

[0046] In order that the dishwasher according to the invention can also be used without problems in smaller dishwashing areas, the dishwasher has a width of between 500 mm and 800 mm and preferably between 600 mm and 800 mm, a depth of between 700 mm and 900 mm and preferably between 750 mm and 850 mm, and a height of between 1350 mm and 1600 mm and preferably between 1400 mm and 1550 mm when the treatment zones are closed.

[0047] According to the present invention, the dishwasher comprises a washing system designed as a recirculation system for spraying washing liquid in the treatment chamber as needed, and at least one final rinse system for spraying final rinse liquid in the treatment chamber as needed. Furthermore, a control device is preferably provided for controlling the at least one washing system and / or the at least one final rinse system. Preferably, the control device is designed to control the at least one washing system such that the washing cycle of each treatment cycle in the first treatment zone is temporally uninterrupted, while the washing cycle of a single treatment cycle in the at least one second treatment zone is intermittent.In this way, the exposure times of the washing liquid in the individual treatment zones can be set to any desired values ​​using just a single washing pump and without the use of a valve control.

[0048] In a further development of the last-mentioned embodiment, it is provided in this context that the control device is further designed to control the at least one washing system in such a way that washing liquid is always sprayed simultaneously in the first and in the at least one second treatment zone.

[0049] With regard to the at least one final rinse system, it is preferably provided that the control device is designed to control the at least one final rinse system in such a way that a final rinse cycle in the at least one second treatment zone always takes place simultaneously or at least temporally overlapping with a final rinse cycle in the first treatment zone. Thus, the risk of re-soiling of the washware is minimized, which applies in particular to embodiments in which the treatment zones are not hermetically separated.

[0050] To ensure that the dishwasher operates as efficiently as possible in terms of time, a preferred embodiment of the dishwasher provides for the treatment cycles in the first and in the at least one second treatment zone to be synchronized with one another. For this purpose, it is conceivable to control the at least one washing system with the control device in such a way that the duration of a wash cycle of a single treatment cycle in the at least one second treatment zone corresponds to the total duration of the wash cycles of a plurality of treatment cycles in the first treatment zone.

[0051] The term "treatment cycle" used herein refers to the cycle to which the dishes in question are subjected in the corresponding treatment zone of the dishwasher before the dishes can be removed from the treatment zone in a clean state. A treatment cycle typically consists of a wash cycle followed by a final rinse cycle. During a wash cycle, wash liquid is sprayed onto the dishes, while during a final rinse cycle, final rinse liquid is sprayed onto the dishes.

[0052] Alternatively or in addition to the last-mentioned embodiment, it is conceivable to control the at least one washing system via the control device in such a way that the duration of a washing cycle of a single treatment cycle in the at least one second treatment zone is an integer multiple of the duration of a washing cycle in the first treatment zone.

[0053] In a preferred development of the dishwasher according to the invention, the control device is further designed to control the at least one washing system and / or the at least one final rinse system in such a way that a washing cycle in the at least one second treatment zone is interrupted automatically, preferably optionally automatically, if at least one of the following conditions is met: - a rinse cycle takes place in the first treatment zone; and / or - the first treatment zone is opened or is not closed; and / or - the second treatment zone is opened or is not closed.

[0054] In this way, the respective rinse cycle of the individual treatment zones can be optimally adapted, which saves resources, especially fresh water and energy.

[0055] In order to achieve the most efficient treatment of the wash ware in the treatment zones, a further development of the invention provides for the treatment parameters for the treatment zones to be selected as individually as possible and adapted to the wash ware to be cleaned.

[0056] In this context, it is conceivable to control at least one washing system in such a way that during a washing cycle: - the temperature of the washing liquid sprayed in the first treatment zone is different from the temperature of the washing liquid sprayed in the at least one second treatment zone; and / or - the nozzle pressure of the washing liquid sprayed in the first treatment zone is different from the nozzle pressure of the washing liquid sprayed in the at least one second treatment zone; and / or - the quantity of washing liquid sprayed per unit of time in the first treatment zone is different from the quantity of washing liquid sprayed per unit of time in the at least one second treatment zone; and / or - the detergent concentration in the washing liquid sprayed in the first treatment zone is different from the detergent concentration in the washing liquid sprayed in at least one second treatment zone.

[0057] Alternatively or additionally, it is conceivable that the control device controls at least one rinsing system in such a way that during a rinsing cycle: - the temperature of the rinse aid liquid sprayed in the first treatment zone is different from the temperature of the rinse aid liquid sprayed in the at least one second treatment zone; and / or - the nozzle pressure of the rinse aid liquid sprayed in the first treatment zone is different from the nozzle pressure of the rinse aid liquid sprayed in the at least one second treatment zone; and / or - the quantity of rinse aid liquid sprayed per unit of time in the first treatment zone is different from the quantity of rinse aid liquid sprayed per unit of time in the at least one second treatment zone; and / or - the rinse aid concentration in the rinse aid liquid sprayed in the first treatment zone is different from the rinse aid concentration in the rinse aid liquid sprayed in at least one second treatment zone.

[0058] The invention is directed not only to a dishwasher, in particular a hood-type or pass-through dishwasher, in which at least two treatment zones are provided in the treatment chamber of the dishwasher, but also to a corresponding method for operating such a dishwasher, which method is not part of the claimed invention.

[0059] The procedure comprises the following steps: - in the first treatment zone and in at least one second treatment zone, washing liquid is sprayed simultaneously until the washing cycle in the first treatment zone is completed; - after completion of the washing cycle in the first treatment zone, the washing cycle of at least one second treatment zone is interrupted and rinse aid is sprayed in the first treatment zone; and - the spraying of washing liquid in at least one second treatment zone is only resumed when another washing cycle is started in the first treatment zone.

[0060] To carry out the method, the dishwasher—according to a further aspect of the present invention—has a control device for controlling the at least one washing system of the dishwasher according to a predetermined program sequence, wherein at least one predetermined program sequence for the first treatment zone and / or the at least one second treatment zone is stored in the control device. In particular, a plurality of predetermined program sequences for the first treatment zone and / or the at least one second treatment zone are stored in the control device to enable the operator to select the most customized treatment parameters possible.

[0061] In order to reduce the operating effort when selecting the program, a preferred development of the last-mentioned embodiments provides that at least one program sequence group with a fixed program sequence for the first treatment zone and a fixed program sequence for the at least one second treatment zone is stored in the control device.

[0062] In this context, it is particularly conceivable for the operator to be able to select a program sequence from the plurality of predefined program sequences for the first treatment zone and, independently of this, a program sequence from the plurality of predefined program sequences for the at least one second treatment zone or a predefined program sequence group.

[0063] Preferably, the program sequences of the program sequence group are selected depending on at least one of the following factors: - a quantity of wash ware, preferably in a standard situation per unit of time; and / or - the different types of wash ware that preferably occur in a standard situation per unit of time; and / or - a degree of soiling of the dishes, preferably occurring in a standard situation.

[0064] In a preferred implementation of the latter embodiments, the program sequence group comprises a program sequence for the first treatment zone, according to which the duration of a wash cycle in the first treatment zone is 40 to 70 seconds (short program), 70 to 120 seconds (standard program), or 2 to 5 minutes (intensive program). With regard to the program sequence for the at least one second treatment zone, it is provided that, according to this program sequence, the duration of a wash cycle in the at least one second treatment zone is identical to the duration of a wash cycle in the first treatment zone.

[0065] Alternatively or additionally, it is conceivable that the program sequence group has a program sequence for the at least one second treatment zone, according to which the time duration for a washing cycle in the at least one second treatment zone is 40 to 70 seconds (short program), 70 to 120 seconds (standard program) or 4 to 10 minutes (intensive program).

[0066] According to a further aspect of the present disclosure, it is provided that the dishwasher has at least one user interface with at least one input field, in particular manually or optically operable, for manually selecting at least one treatment program for the first and / or at least one second treatment zone.

[0067] A “manually operable input field” is to be understood in particular as a keyboard or the like, while an “optically operable input field” is an input field that can be controlled via radio, IR, WLAN or similar wireless communication connection.

[0068] According to a preferred implementation, a common user interface is provided for the first and at least one second treatment zone. This common user interface is preferably arranged in the upper area of ​​the vertically pivotable or movable hood, via which the first treatment zone can be closed. This ensures that the machine operator can only manually operate the input field when the first treatment zone is closed.

[0069] Alternatively, it is of course also conceivable that a user interface is provided for the first and at least one second treatment zone.

[0070] In a preferred implementation of the invention, it is provided that the at least one user interface is designed to provide information regarding a system status of the dishwasher, preferably optically and / or acoustically.

[0071] Alternatively or additionally, it is conceivable that the at least one user interface has at least one input field, in particular a keyboard, which can be actuated optically or manually, for manually intervening in a treatment cycle of the first treatment zone and / or in a treatment cycle of the at least one second treatment zone.

[0072] In this context, it is further conceivable if the at least one user interface has a first manually operable input field, in particular a keyboard, for starting and / or ending a treatment cycle in the first and / or at least one second treatment zone and has a second input field, which is designed separately from the first input field and is in particular manually or optically operable, for retrieving information regarding a system status of the dishwasher and / or for manually intervening in a treatment cycle of the first and / or at least one second treatment zone and / or for calling up and / or selecting program parameters for the first and / or at least one second treatment zone.

[0073] In a particularly preferred embodiment of the dishwasher according to the invention, the first and the at least one second treatment zone are spatially separated from one another by a partition in such a way that when washing liquid is sprayed in one of the two treatment zones, re-soiling in the other treatment zone, in particular caused thereby, is effectively prevented.

[0074] Preferably, the washing system of the dishwasher is assigned to the first and at least one second treatment zone. The washing system comprises a washing pump system and a washing nozzle system, wherein the washing pump system is fluidly connected or connectable to the wash tank on the suction side for supplying liquid collected in the wash tank to the washing nozzle system as needed.

[0075] In a preferred embodiment of the dishwasher, the washing nozzle system has a plurality of washing nozzles assigned to the first treatment zone and a plurality of washing nozzles assigned to the second treatment zone, wherein upon actuation of the washing pump system, the liquid collected in the washing tank is supplied as washing liquid to both the washing nozzles assigned to the first treatment zone and the washing nozzles assigned to the second treatment zone.

[0076] In particular, it is provided that at least some of the washing nozzles, in particular at least some of the washing nozzles assigned to the at least one second treatment zone, are designed as washing nozzles that are stationary with respect to the corresponding treatment zone.

[0077] According to one aspect of the disclosure, at least some of the stationary washing nozzles are formed in the partition and / or in at least one washing arm that is stationary with respect to the corresponding treatment zone.

[0078] The partition can, for example, have a substantially horizontally extending partition element, in particular a partition plate, which is arranged or can be arranged between the first and the at least one second treatment zone, as well as a line system arranged on the partition element, wherein the line system arranged on the partition element is fluidly connected or connectable to the washing pump system, and wherein at least some of the washing nozzles formed in a stationary manner in the partition are designed in the line system arranged on the partition element or are at least fluidly connected to the line system arranged on the partition element.

[0079] In a preferred embodiment of the dishwasher according to the invention, the washing nozzles assigned to the at least one second treatment zone are formed in an upper wash arm system arranged in an upper region of the at least one second treatment zone and in a lower wash arm system arranged in the lower region of the at least one second treatment zone, wherein the upper and / or the lower wash arm system is / are stationary with respect to the at least one second treatment zone.

[0080] According to the invention, each treatment zone of the dishwasher is assigned its own rinse aid system, each having a rinse aid pump and rinse aid nozzles, wherein at least some of the rinse aid nozzles, in particular at least some of the rinse aid nozzles assigned to the at least one second treatment zone, are designed as rinse aid nozzles that are stationary with respect to the corresponding treatment zone.

[0081] In particular, it is preferred if at least some of the stationary rinse nozzles are formed in the partition and / or in at least one rinse arm that is stationary with respect to the corresponding treatment zone.

[0082] In a particularly preferred embodiment of the dishwasher according to the invention, the partition has a substantially horizontally extending partition element, in particular a partition plate, which is arranged or can be arranged between the first and the at least one second treatment zone, as well as a line system arranged on the partition element, wherein the line system arranged on the partition element is fluidly connected or connectable to the rinse aid pump assigned to the second treatment zone, and wherein at least some of the rinse aid nozzles formed in a stationary manner in the partition are designed in the line system arranged on the partition element or are at least fluidly connected to the line system arranged on the partition element.

[0083] The invention is described in more detail below with reference to the exemplary embodiments shown in the drawings.

[0084] The drawings show: Fig. 1a shows a perspective view of a program-controlled dishwasher designed as a hood-type dishwasher according to an embodiment of the present invention; Fig. 1b which in Fig. 1a shown embodiment in a front view; Fig. 2 schematically shows a program-controlled dishwasher designed as a hood-type dishwasher according to a further embodiment of the invention; Fig. 3 schematically shows a program-controlled dishwasher designed as a hood-type dishwasher according to a further embodiment of the invention; Fig. 4 schematically shows a hydraulic diagram of a washing system of a dishwasher designed as a programmable automatic machine according to an embodiment of the present invention; Fig. 5 schematically shows a hydraulic diagram of a washing system of a dishwasher designed as a programmable automatic machine according to a further embodiment of the present invention; Fig. 6 schematically shows a hydraulic diagram of a washing system of a dishwasher designed as a programmable automatic machine according to a further embodiment of the present invention; Fig. 7 schematically shows a hydraulic diagram of a washing system of a dishwasher designed as a programmable automatic machine according to a further embodiment of the present invention; Fig. 8a the dishwasher designed as a program machine according to Fig. 7 washing system used in a perspective view; Fig. 8b in the dishwasher designed as a program machine according to Fig. 7 washing system used in a perspective exploded view; Fig. 9 a washing system according to Fig. 8a and Fig. 8b shows the separating element used in a perspective view from below; Fig. 10a a washing system according to Fig. 8a and Fig. 8b shows a perspective view from below of the stationary washing arm used; Fig. 10b one with the in Fig. 10a shows the spray pattern achievable with the stationary washing arm; Fig. 11 schematically shows a hydraulic diagram of a washing system of a dishwasher designed as a programmable automatic machine according to a further embodiment of the present invention; Fig. 12 an exemplary embodiment of a dishwasher designed as a program machine according to Fig. 11 washing system used in a perspective exploded view; Fig. 13 one in which Fig. 12 shows a separating element used in the washing system shown in a perspective exploded view; Fig. 14 a washing system according to Fig. 12 common washing arm used in a side view; Fig. 15 shows a further embodiment of a separating element for the dishwasher designed as a program machine according to Fig. 11 washing system used; and Fig. 16 an embodiment of a user interface for the dishwasher according to the invention.

[0085] The invention relates to commercial dishwashers, in particular dishwashing machines or utensil dishwashers, in the form of a programmable automatic dishwasher. In particular, the present invention relates to programmable automatic dishwashers designed as hood-type or (basket-type) pass-through dishwashers.

[0086] A commercial dishwasher 1 designed as a program machine usually has a program control device (also referred to herein as "control device 100") for controlling at least one cleaning program and a treatment chamber 2 closable by at least one door 9 and / or at least one hood 8 in a machine housing for receiving items to be cleaned, such as dishes, cutlery, pots, pans, trays and glasses.

[0087] As can be seen particularly from the depictions in the Fig. 2 and Fig. 3, it is ergonomically advantageous if a program-controlled dishwasher designed as a pass-through dishwasher 1 is equipped with a table on both its inlet and outlet sides (inlet table 3, outlet table 4). The baskets 5 loaded with dirty wash ware can thus be pushed into the dishwasher 1 on the inlet table 3. After the wash ware has been treated in the treatment chamber 2 of the dishwasher 1, the basket 5 with the then cleaned wash ware is moved from the machine 1 to the outlet table 4.

[0088] The contact time, i.e. the time during which cleaning or washing liquid wets the dishes within the treatment chamber 2, depends in particular on the duration of the wash phase specified by the treatment program. For normally soiled dishes, such as plates, bowls, cups and / or glasses, a cleaning cycle consisting of a wash phase followed by a final rinse phase generally requires between 50 and 100 seconds. However, longer treatment of the dishes may be necessary, particularly if they are more heavily soiled or if dirt is burned into the dishes. In this case, the total treatment time must often be extended to up to 400 seconds. The extended contact time subjects the dishes to be cleaned to intensive treatment, so that even more heavily soiled dishes can be cleaned effectively.

[0089] In order to ensure that, despite intensive treatment, the cleaning capacity of the dishwasher 1, i.e. the number of wash items / wash baskets 5 that can theoretically be processed by the machine 1 per unit of time, is not negatively affected, the invention provides for the treatment chamber 2 of the dishwasher 1 designed as a programmable automatic machine to be divided into at least two treatment zones 6, 7, wherein the at least two treatment zones 6, 7 are designed such that the treatment of the wash items in the individual treatment zones 6, 7 can take place independently of one another.

[0090] Although the exemplary embodiments of the dishwasher 1 according to the invention shown in the drawings are each designed with exactly two treatment zones 6, 7, this is not to be considered limiting. Rather, it is of course also conceivable for the treatment chamber 2 of the dishwasher 1 according to the invention to be divided into more than two zones.

[0091] For example, in the Fig. 1a and Fig. As shown in Figure 1b, an exemplary embodiment of the present invention relates to a (basket) pass-through dishwasher 1 designed as a hood-type dishwasher 1, which is characterized in particular by the fact that, in addition to the usually provided (main) treatment zone 6, a further treatment zone 7 is arranged below this treatment zone 6. The upper main treatment zone 6, which is also referred to herein as the "first treatment zone," is designed to accommodate a washing basket 5, which is optionally loaded with the items to be treated.

[0092] For this purpose, the base area of ​​the first treatment zone or main treatment zone 6 has a dimension adapted to the base area of ​​a washing basket 5, and in particular a base area of ​​600 mm x 500 mm, 500 mm x 500 mm or 400 mm x 400 mm.

[0093] Furthermore, the main treatment zone 6 is designed so that the washing basket 5 is fed from an inlet table 3 (into the Fig. 1a and Fig. 1b not shown) can be inserted directly into the treatment zone 6 of the hood-type dishwasher 1. In other words, the washing level 6a of the main treatment zone 6 is horizontally aligned with the table height of the inlet table 3.

[0094] In particular, the Fig. In the dishwasher 1 shown in Figure 1b, the height of the horizontal washing level 6a of the first treatment zone 6 is variably adjustable and is preferably between 800 mm and 900 mm, and preferably between 830 mm and 890 mm. The height of the horizontal washing level 6a of the first treatment zone 6 is adjusted, for example, via the machine's height-adjustable feet.

[0095] Preferably, a discharge table 4 is also provided, wherein the table height of the discharge table 4 is also horizontally aligned with the washing level 6a of the main treatment zone 6, so that the washing basket 5 can be pushed directly onto the discharge table 4 after treatment in the main treatment zone 6.

[0096] As already indicated, a further treatment zone 7 is provided below the main treatment zone 6. This further treatment zone 7, which is also referred to herein as the "second treatment zone" or "auxiliary treatment zone," is used in particular for cleaning items that require a longer exposure time compared to the items to be cleaned in the first treatment zone 6.

[0097] In the Fig. 1a and Fig. In the exemplary embodiment shown in Fig. 1b, the second treatment zone 7 is also designed to receive a washing basket 5, wherein the washware to be treated in the further treatment zone 7 is received in the washing basket 5.

[0098] In detail, the dimensions and cleaning capacity of the main treatment zone (first treatment zone 6) and the dimensions and cleaning capacity of the auxiliary treatment zone (second treatment zone 7) are preferably adapted to the types of wash ware that are usually generated and to be cleaned in dishwashing areas (such as dishes, cutlery, glasses and pots), the quantity of wash ware that is usually generated per unit of time to be cleaned for each type of wash ware and / or to the degree of soiling of the wash ware that is generated per unit of time in such a way that, when the dishwasher 1 is in operation, even during peak times, the total wash ware can be cleaned as quickly as possible without delay.

[0099] Therefore, in the Fig. In the embodiment of the dishwasher 1 according to the invention shown in Figure 1b, the first treatment zone 6 has a loading volume that can be effectively used to clean wash ware that is 2 to 4 times larger than the loading volume that can be effectively used in the second treatment zone 7. Specifically, the loading volume that can be effectively used in the first treatment zone 6 is between 60 and 180 liters, preferably between 80 and 150 liters, and more preferably approximately 120 liters, while the loading volume that can be effectively used in the second treatment zone 7 is between 25 and 75 liters, and preferably between 30 and 50 liters. This ensures that even heavily soiled wash ware can be effectively cleaned in a timely manner, even during peak times in dishwashing areas.

[0100] As shown, the Fig. 1a and Fig. 1b, the exemplary embodiment of the invention schematically illustrated provides that the two treatment zones 6, 7 can be loaded and unloaded with wash ware independently of one another. Specifically, the first treatment zone 6 can be loaded and unloaded with wash ware via an opening that can be closed by a vertically displaceable hood 8. The displacement path of the hood 8 is at least 300 mm, preferably at least 400 mm, while the first treatment zone 6 has an effective height for cleaning wash ware of at least 400 mm.

[0101] On the other hand, the second treatment zone 7 has an effective height for cleaning wash ware of at least 120 mm and preferably of at least 150 mm, so that cutlery placed in cutlery baskets can also be cleaned in this treatment zone 7.

[0102] In addition, the second treatment zone 7 has its own closable opening through which this treatment zone 7 can be loaded and unloaded with wash items.

[0103] In the Fig. 1a and Fig. In the exemplary embodiment shown in Fig. 1b, it is provided in particular that the second treatment zone 7 has its own opening which can be closed via a door 9 which can be pivoted about a horizontal pivot axis and via which the second treatment zone 7 can be loaded and unloaded with items to be washed.

[0104] It is particularly advantageous that the door 9, which can be pivoted about a horizontal pivot axis, is designed such that, in its open state, it is horizontally aligned with the washing level 7a of the further treatment zone 7. In this way, in its open state, the door 9 simultaneously serves as a loading and unloading aid for pushing the wash items or the wash basket 5 in and out.

[0105] Like the height of the horizontal washing level 6a of the first treatment zone 6, the height of the horizontal washing level 7a of the second treatment zone 7 is variably adjustable and is preferably 350 mm to 600 mm and more preferably 500 mm to 600 mm (measured from the floor of the installation room).

[0106] In Fig. 2 is the exemplary embodiment of the dishwasher 1 according to the invention according to the Fig. 1a and Fig. 1b shows a configuration in which the dishwasher 1 is equipped with inlet and outlet tables 3, 4. Specifically, manual pre-cleaning and manual pre-washing of the dirty dishes typically take place on the inlet side of the dishwasher 1. Furthermore, the dirty dishes can be loaded into special dishwashing baskets 5 here.

[0107] The outlet side is used for drying and unloading the dish racks. As in Fig. 2, the washing level 6a of the main treatment zone 6 is at the same height as the inlet and outlet tables 3, 4. In this way, the dishwashing baskets 5 to be cleaned can be easily and ergonomically pushed from the inlet table 3 into the main treatment zone 6 of the hood-type dishwasher 1 and, after cleaning has been completed, from the dishwasher 1 onto the outlet table 4.

[0108] As is particularly evident from the schematic representation in Fig. 3, the present invention is not limited to the additional treatment zone 7 being arranged below the main treatment zone 6. Rather, it is of course also conceivable to arrange the additional treatment zone 7 next to the main treatment zone 6 or above the main treatment zone 6.

[0109] With regard to the Fig. 1 to 3, it should be noted that, when the treatment zones 6, 7 are closed, the dishwasher 1 has a width of between 500 mm and 800 mm, and preferably between 600 mm and 800 mm, a depth of between 700 mm and 900 mm, and preferably between 750 mm and 850 mm, and a height of between 1350 mm and 1600 mm, and preferably between 1400 mm and 1550 mm. In other words, the external dimensions of the dishwasher 1 according to the invention are comparable to those of a conventional machine of the same type which has only a single treatment zone, but with the dishwasher according to the invention the machine capacity is increased while resource consumption is relatively reduced.

[0110] For example, to clean the dishes resulting from a total of 150 menus, a conventional dishwasher with only a single treatment zone requires a total of 67 minutes with a fresh water consumption of 100 liters and an energy consumption of 2.9 kWh (for a standard treatment program).

[0111] With the dishwasher 1 according to the invention, however, the treatment time can be reduced to less than 50 minutes, with a fresh water consumption of 72.5 liters and an energy consumption of 2.1 kWh.

[0112] The following is based on the illustrations in the Fig. 4 to 6 describe the functioning of different washing / rinsing systems which are used, for example, in a dishwasher 1 designed as a programmable automatic machine according to the present invention.

[0113] Although it is fundamentally conceivable to equip the dishwasher 1 according to the present invention with a plurality of wash tanks, each wash tank being assigned to a treatment zone 6, 7, in the preferred exemplary embodiments of the solution according to the invention shown in the drawings, it is provided that the dishwasher 1 has only a single wash tank 12, which is assigned to the (single) treatment chamber 2 and is thus jointly assigned to the individual treatment zones 6, 7 of the (single) treatment chamber 2. The wash tank 12 preferably has a capacity of 20 to 40 liters, preferably 25 to 35 liters. This capacity is sufficient for simultaneous rinse operation in both treatment zones 6, 7. On the other hand, the tank 12 is designed to be small enough to fit into the reduced installation space in the machine housing compared to a conventional machine with only a single treatment zone.

[0114] As shown in the hydraulic diagrams according to the Fig. 4 to 6, the (single) wash tank 12 is located below the treatment chamber 2 of the machine 1 and serves to hold liquid sprayed in the respective treatment zones 6, 7 of the treatment chamber 2. As already indicated, in the embodiments shown in the drawings, the treatment chamber 2 of the dishwasher 1 is divided into a total of two treatment zones 6, 7, namely a main treatment zone 6 and an additional treatment zone 7. The treatment zones 6, 7, which are integrated within the (single) treatment chamber 2, are assigned a common washing system.

[0115] In the Fig. 4, the washing system has a (common) washing pump 13, with which washing liquid can be pumped from the washing tank 12 through a washing liquid line system to corresponding washing nozzles 11.1, 11.2.

[0116] At the Fig. In the embodiment schematically illustrated in Figure 4, the washing nozzles 11.1, 11.2 are integrated into corresponding washing arms 10.1, 10.2, 10.3. Here, a first nozzle arrangement consisting of an upper washing arm 10.1 and a lower washing arm 10.2 is assigned to the upper (main) treatment zone 6. A further nozzle arrangement, which also has an upper washing arm 10.3 and a lower washing arm 10.4, is assigned to the lower (additional) treatment zone 7.

[0117] In the Fig. In the hydraulic diagram shown in Figure 4, the lower wash arm 10.2 of the main treatment zone 6 and the upper wash arm 10.3 of the additional treatment zone 7 are designed as a common wash arm. In other words, in this embodiment, a single wash arm 10.2, 10.3 is used, which has a dual function: this common wash arm serves as the lower wash arm of the (upper) main treatment zone 6 and simultaneously as the upper wash arm of the (lower) additional treatment zone 7. For this purpose, the common wash arm has wash nozzles 11.1 directed towards the (upper) main treatment zone 6 and wash nozzles 11.2 directed towards the (lower) additional treatment zone 7.

[0118] Of course, the present invention is not limited to this aspect. As the hydraulic diagram according to Fig. 5, it is also conceivable that no common washing arm is used, so that each individual treatment zone 6, 7 is assigned separate washing arms 10.1-10.4.

[0119] The washing nozzles 11.1, 11.2 integrated in the corresponding washing arms 10.1-10.4 are each directed in the treatment chamber 2 towards the correspondingly assigned treatment zone 6, 7 and serve to spray the washing liquid pumped by the common washing pump 13 onto the items to be cleaned arranged in the respective treatment zones 6, 7.

[0120] The sprayed washing liquid falls back into the washing tank 12 by gravity. The washing tank 12, the washing pump 13, the washing liquid system 16, and the washing nozzles 11, together with the treatment zones 6, 7 of the treatment chamber 2, form a washing liquid circuit. The washing liquid line system 16 connects the pressure side of the washing pump 13 to the washing nozzles 11.1, 11.2.

[0121] Furthermore, a rinse aid system is provided for pumping rinse aid liquid by means of a rinse aid pump 14 through a rinse aid line system 17 to rinse aid nozzles 15a, 15b, which are directed toward the area of ​​the dishes to be cleaned in the treatment chamber 2. The sprayed rinse aid liquid falls by gravity from the treatment chamber 2 into the wash tank 12. The rinse aid system 17 connects the pressure side of the rinse aid pump 14 to the rinse aid nozzles 15.1, 15.2.

[0122] As already explained, the washing nozzles 11.1, 11.2 and the rinsing nozzles 15.1, 15.2 can be arranged in the areas above and / or below and, if desired, also to the side of the respective treatment zone 6, 7 within the treatment chamber 2 and can each be directed towards the area in which the wash ware is positioned in the respective treatment zone.

[0123] Preferably, for each treatment zone 6, 7, a plurality of wash nozzles 11.1 or 11.2 are provided on at least one upper wash arm 10.1 or 10.3, a plurality of wash nozzles 11.1 or 11.2 on a lower wash arm 10.2 or 10.4, a plurality of rinse nozzles 15.1 or 15.2 on at least one upper rinse arm 18.1 or 18.3, and a plurality of rinse nozzles 15.1 or 15.2 on at least one lower rinse arm 18.2 or 18.4 are provided. As already explained, the lower wash arm 10.2 of the upper main treatment zone 6 and the upper wash arm 10.3 of the lower additional treatment zone 7 can be designed as a common wash arm (cf. Fig. 4). The same applies to the corresponding rinse arms 18.2, 18.3.

[0124] Alternatively, it is nevertheless conceivable to provide separate washing and rinsing arms 10.1-10.4 and 18.1-18.4 for each of the at least two treatment zones 6, 7, as shown in the hydraulic diagram according to Fig. 5 is indicated.

[0125] Before rinse aid liquid is sprayed during the final rinse phase, a quantity of wash liquid corresponding to the rinse aid liquid is pumped out of the wash tank 12 by means of a drain pump (not shown in the drawings), the suction side of which is connected via a drain line to a sump of the wash tank 12. If the wash tank 12 is empty before the first start of the dishwasher 1, which is designed as a programmable automatic machine, it must first be filled with fresh water via a fresh water line (not shown) or by means of the rinse aid system and its rinse aid pump 14 with fresh water or another rinse aid liquid or wash liquid.

[0126] The rinse liquid can be fresh water or fresh water mixed with rinse aid. The wash liquid, on the other hand, contains detergent, which is preferably automatically added to the liquid contained in the wash tank 12 by a detergent dosing device (not shown). The above-mentioned program control device controls the wash pumps 13, the rinse pump 14, the drain pump, and the detergent solution pump (not shown) depending on the cleaning program selected by an operator on the program control device. At least one cleaning program is provided; preferably, several optionally selectable cleaning programs are provided.

[0127] From the hydraulic diagrams shown in the drawings, it can be seen that a rinse pump 14 is connected with its suction side to an outlet of a boiler 22. The boiler 22 further has an inlet connected to a fresh water supply line 30, via which either fresh water or fresh water with added rinse aid is supplied to the boiler 22. In the boiler 22, the liquid supplied via the inlet (pure fresh water or fresh water with added rinse aid) is heated according to a process sequence. The rinse liquid heated in the boiler 22 can be supplied via the rinse pump 14, whose suction side is connected to the boiler outlet, via the rinse line system 17 to the rinse nozzles 15.1 and 15.2, for example, during a fresh water rinse phase. The rinse nozzles 15.1 and 15.2 are arranged in the treatment zones 6, 7 of the treatment chamber 2 in order to spray the rinse aid liquid heated in the boiler 22 onto the washware in the corresponding treatment zone 6, 7 of the treatment chamber 2. Of course, it is also conceivable that pure fresh water is supplied to the boiler 22 via the inlet into the fresh water supply line 30, to which a rinse aid is added after heating in the boiler 22.

[0128] In this context, it is also conceivable for the final rinse system to have a preferably electrically operated steam generator, which can be integrated, for example, into the boiler 22. In this case, a corresponding steam outlet of the steam generator can be formed at the upper area of ​​the boiler 22 (not shown in the drawings). The steam outlet of the steam generator can be connected to the treatment chamber via a steam line at a location above the wash tank in order to introduce the steam generated in the steam generator into the treatment chamber as needed. Of course, other positions are also possible.

[0129] A heater 47 is located in the boiler 22, which according to some embodiments of the invention serves not only to heat the rinse liquid but also to generate steam as needed. Furthermore, a level sensor can be arranged in or on the boiler 22, which, for example, controls a valve 49 of the fresh water line 30.

[0130] Based on the Fig. 6, it is also apparent that each individual treatment zone 6, 7 can be assigned its own washing system and its own rinsing system. In contrast to the Fig. 4 and Fig. In the embodiments shown in Figure 5, treatment zone 6 is assigned its own wash pump 13.1 and its own wash liquid system 16.1, as well as its own rinse pump 14.1 with its own rinse line system 17.1. Similarly, treatment zone 7 is assigned its own wash pump 13.2 and its own wash liquid system 16.2, as well as its own rinse pump 14.2 with its own rinse line system 17.2. The wash pumps 13.1, 13.2 and the rinse pumps 14.1, 14.2 can be controlled independently of one another by a control device (not shown), so that different treatment programs can be implemented independently of one another in the respective treatment zones.

[0131] In detail, the Fig. 4 to 6 schematically indicated control device 100 for controlling the corresponding controllable components of the washing and / or rinsing system of the dishwasher 1. In particular, the control device 100 is designed to control the preferably common washing pump 13 of the washing system in such a way that the washing cycle of each treatment cycle in the first treatment zone 6 is temporally uninterrupted, while the washing cycle of a single treatment cycle in the second treatment zone 7 is intermittent.

[0132] Furthermore, in the exemplary embodiments of the dishwasher 1 according to the invention shown in the drawings, the control device 100 is further designed to control the preferably common washing pump 13 in such a way that washing liquid is always sprayed simultaneously in the first and second treatment zones 6, 7.

[0133] With regard to the final rinse system of the dishwasher 1, the control device 100 is designed to control the two final rinse pumps 14.1, 14.2 such that in the second treatment zone 7 a final rinse cycle always takes place simultaneously or at least temporally overlapping with a final rinse cycle in the first treatment zone 6.

[0134] In this case, it is advantageous if the control device 100 is further designed to control the preferably common washing pump 13 such that the duration of a washing cycle of a single treatment cycle in the second treatment zone 7 corresponds to the total duration of the washing cycles of a plurality of treatment cycles in the first treatment zone 6. In particular, it is conceivable in this context that the control device 100 controls the preferably common washing pump 13 such that the duration of a washing cycle of a single treatment cycle in the second treatment zone 7 is an integer multiple of the duration of a washing cycle in the first treatment zone 6.

[0135] In principle, in the embodiments of the dishwasher 1 according to the invention shown in the drawings, it is provided that the control device 100 is designed to control the at least one washing system and / or the at least one final rinse system in such a way that a washing cycle in the second treatment zone (7) is interrupted automatically, preferably optionally automatically, if at least one of the following conditions is met: - a rinse cycle takes place in the first treatment zone 6; and / or - the first treatment zone 6 is opened or is not closed, which can be detected, for example, by a corresponding sensor; and / or - the second treatment zone 7 is opened or is not closed, which can also be detected, for example, via a corresponding sensor.

[0136] The washing system and / or the final rinse system are preferably controlled automatically. In other words, the at least one washing and / or final rinse system is preferably controlled according to a predetermined program sequence, with at least one predetermined program sequence for the first treatment zone 6 and / or the at least one second treatment zone 7 being stored in the control device 100. A plurality of predetermined program sequences for the first treatment zone 6 and / or the at least one second treatment zone 7 are preferably stored in the control device 100.

[0137] In this context, it is conceivable that at least one program sequence group with a predetermined program sequence for the first treatment zone 6 and a predetermined program sequence for the at least one second treatment zone 7 is stored in the control device 100. The operator of the dishwasher 1 can selectively select a program sequence from the plurality of predetermined program sequences for the first treatment zone 6 and, independently of this, a program sequence from the plurality of predetermined program sequences for the at least one second treatment zone 7 or a predetermined program sequence group.

[0138] Advantageously, at least one program sequence group with a defined program sequence for the first treatment zone 6 and with a defined program sequence for the at least one second treatment zone 7 is stored in the control device 100, and the program sequences of the program sequence group are selected depending on at least one of the following factors: - a quantity of wash ware, preferably in a standard situation per unit of time; and / or - the different types of wash ware that preferably occur in a standard situation per unit of time; and / or - a degree of soiling of the dishes, preferably occurring in a standard situation.

[0139] Furthermore, it is preferred if at least one program sequence group with a fixed program sequence for the first treatment zone 6 and a fixed program sequence for the at least one second treatment zone 7 is stored in the control device 100, wherein the program sequence group has a program sequence for the first treatment zone 6, according to which the time duration for a wash cycle of the first treatment zone is 40 to 70 seconds, 70 to 120 seconds or 2 to 5 minutes, and wherein the program sequence group has a program sequence for the at least one second treatment zone 7, according to which the time duration for a wash cycle in the second treatment zone 7 is identical to the time duration for a wash cycle in the first treatment zone 6.

[0140] On the other hand, it is preferred if at least one program sequence group with a fixed program sequence for the first treatment zone 6 and a fixed program sequence for the at least one second treatment zone 7 is stored in the control device 100, wherein the program sequence group has a program sequence for the first treatment zone 6, according to which the time duration for a wash cycle in the first treatment zone is 40 to 70 seconds, 70 to 120 seconds or 2 to 5 minutes, and wherein the program sequence group has a program sequence for the at least one second treatment zone 7, according to which the time duration for a wash cycle in the second treatment zone is 40 to 70 seconds, 70 to 120 seconds or 4 to 10 minutes.

[0141] The following is based on the illustration in Fig. 7 a further embodiment of the present invention is described in more detail.

[0142] As shown in the hydraulic diagram according to Fig. 7, in this embodiment, the (single) wash tank 12 is also located below the treatment chamber 2 of the machine 1 and serves to hold the liquid sprayed in the respective treatment zones 6, 7 of the treatment chamber 2. As in the other embodiments shown in the drawings, in the embodiment shown in Fig. 7 schematically illustrated embodiment of the dishwasher 1 according to the invention, it is provided that the treatment chamber 2 of the dishwasher 1 is divided into a total of two treatment zones 6, 7, namely a main treatment zone 6 and an additional treatment zone 7.

[0143] Also, in the Fig. 7 schematically illustrated embodiment, a common washing system is assigned to the two treatment zones 6, 7. This common washing system has, according to the Fig. 7, a (common) washing pump 13, with which washing liquid can be pumped from the washing tank 12 through a washing liquid line system to corresponding washing nozzles 11.1, 11.2.

[0144] At the Fig. In the embodiment schematically illustrated in Figure 7, the washing nozzles 11.1, 11.2 are integrated into corresponding washing arms 10.1, 10.2, 10.3, 10.4. Here, a first washing arm arrangement consisting of an upper washing arm 10.1 and a lower washing arm 10.2 is assigned to the upper (main) treatment zone 6. These two washing arms 10.1, 10.2 are preferably designed to be rotatable relative to the treatment zone 6.

[0145] In contrast to, for example, the Fig. 4, however, in the embodiment according to Fig. 7, it is provided that the lower wash arm 10.2 is assigned solely to the upper (main) treatment zone 6. Accordingly, in this embodiment, the wash arm 10.2 does not have the previously described dual function.

[0146] The lower (additional) treatment zone 7 is also assigned corresponding wash arm systems. In detail, and as will be explained in more detail below with reference to the illustrations in the Fig. 8a, Fig. 8b, Fig. 9, Fig. 10a and Fig. 10b, is in the Fig. 7 schematically illustrated exemplary embodiment, a lower washing arm 10.4 is assigned to the lower (additional) treatment zone 7, which - like the washing arms 10.1 and 10.2 of the upper (main) treatment zone 6 - is designed as a washing arm that is rotatable with respect to the lower additional treatment zone 7.

[0147] For reasons of space, however, the Fig. 7, the upper wash arm system 10.3 of the lower (additional) treatment zone 7 is designed as a wash arm system arranged stationary with respect to the treatment zone 7. This wash arm system has - as will be explained below with reference, for example, to the illustrations in the Fig. 8a and Fig. 8b - several wash arms 10.3, wherein these wash arms 10.3 are each stationary, ie non-rotatable, with respect to the treatment zone 7. In this way, the upper wash arm system 10.4 can be designed to be particularly compact and, in particular, with a low height, so that the lower treatment zone 7 has the largest possible (effective) volume available in order to treat the wash ware accordingly.

[0148] As with the example in Fig. 4 schematically illustrated embodiment, in the embodiment according to Fig. 7, it is provided that washing nozzles 11.1, 11.2 are formed in the corresponding washing arms 10.1, 10.2, 10.3, 10.4, which are each directed in the treatment chamber 2 onto the correspondingly assigned treatment zone 6, 7 and serve to spray the washing liquid delivered by the common washing pump 13 onto the items to be cleaned arranged in the respective treatment zones 6, 7.

[0149] The sprayed washing liquid then falls by gravity into the (single) washing tank 12, which is Fig. 7, for example, has a capacity of approximately 30 liters. Thus, the wash tank 12, the wash pump 13, the wash fluid line system 16, and the wash nozzles 11.1, 11.2, together with the treatment zones 6, 7 of the treatment chamber 2, form a wash fluid circuit. The wash fluid line system 16 connects the pressure side of the wash pump 13 with the corresponding wash nozzles 11.1, 11.2.

[0150] At the Fig. In the embodiment of the dishwasher 1 according to the invention shown schematically in Figure 7, a final rinse system is further provided for conveying final rinse liquid by means of final rinse pumps 14.1, 14.2 through corresponding final rinse line systems 17.1, 17.2 to final rinse nozzles 15.1, 15.2, which are directed in the treatment chamber 2 in the treatment zones 6, 7 towards the area of ​​the items to be treated.

[0151] As with the Fig. 6 schematically illustrated dishwasher 1 is in the embodiment according to Fig. 7, it is provided that the upper treatment zone 6 is assigned its own rinse system consisting of its own rinse pump 14.1 and its own rinse line system 17.1. Similarly, the lower treatment zone 7 is assigned its own rinse system consisting of its own rinse pump 14.2 and its own rinse line system 17.2. The two rinse pumps 14.1, 14.2 are connected by a Fig. 7 can be controlled by the control device 100 shown only schematically. The upper treatment zone 6 is assigned corresponding rinse-aid nozzles 15.1, to which fresh water or fresh water with added rinse aid is supplied via the rinse-aid pump 14.1 during a rinse phase. The rinse-aid nozzles 15.1 of the upper treatment zone 6—like the corresponding wash nozzles 11.1—are preferably integrated into rinse-aid arms mounted so as to rotate relative to the upper treatment zone 6.

[0152] The rinse nozzles 15.2 of the lower treatment zone 7 are preferably designed at least partially as stationary rinse nozzles, ie in a rinse arm that is stationary with respect to the lower treatment zone 7. This applies to the Fig. 7, in particular for the rinse aid nozzles 15.2 arranged in the upper area of ​​the lower treatment zone 7.

[0153] As subsequently explained with reference to the illustration in Fig. 9, for the lower treatment zone 7, the corresponding rinse aid nozzles 15.2 arranged in the upper area are designed in rinse aid arms which are integrated in a separating element (separation 50).

[0154] The separating element is preferably a separating plate which can be fixed in the treatment chamber 2 and which serves to spatially separate the first and second treatment zones 6, 7 from one another in such a way that when washing liquid is sprayed in one of the two treatment zones 6, 7, re-soiling in the other treatment zone 7, 6, in particular as a result thereof, is effectively prevented.

[0155] In detail, and as is the case, for example, with the representations in the Fig. 8a and Fig. 8b, in this embodiment the separating element designed as a separating plate is dimensioned such that preferably the entire effective horizontal cross-sectional area of ​​the treatment chamber 2 is covered, so that the upper and lower treatment zones 6, 7 are effectively spatially separated from one another. In order to nevertheless ensure that when washing liquid is sprayed in the upper treatment zone 6, the sprayed washing liquid can flow back into the (common) wash tank 12 of the dishwasher 1 by gravity, it is provided that in at least one area to the side of the washing liquid line system 16 or to the side of the final rinse line system 17.1, 17.2, a gap opening 52 remains, which, however, is not aligned in the vertical direction with the treatment area in the lower treatment zone 7.

[0156] In detail, and as can be seen in particular from the illustrations in the Fig. 8a and Fig. 8b, this exemplary embodiment provides for the washing liquid line system 16 and the final rinse line systems 17.1, 17.2 to be accommodated, at least in part, in a common shaft housing 60. On the other hand, the separating element, designed as a separating plate, abuts against this shaft housing 60 and is supported / secured there. In this way, gap openings are provided on the left and right sides of the (centrally arranged) shaft housing 60, through which gap openings the liquid sprayed in the upper treatment zone 6 can drain by gravity into the common wash tank 12.

[0157] In particular, the representation in the Fig. 8a and Fig. 8b further shows that the upper wash arm 10.3 assigned to the lower treatment zone 7 is designed as a wash arm that is stationary relative to the treatment zone 7 and in which the corresponding wash nozzles 11.2 are accommodated. In the illustrated embodiment, this stationary upper wash arm 10.3 of the lower wash zone 7 also serves to support / fix the separating element 51 designed as a separating plate. In this way, a particularly compact design is achieved, which increases the effectively available volume for treating washware in the lower treatment zone 7.

[0158] The representations in the Fig. 8a and Fig. 8b further shows that the wash arms 10.1, 10.2 assigned to the upper treatment zone 6 are each designed as wash arms rotatable relative to the treatment zone 6. The same preferably also applies to the lower wash arm 4 assigned to the lower treatment zone 7.

[0159] The (upper) washing arm 10.3 of the lower treatment zone 7 used in this embodiment is again in Fig. 10a, where Fig. 10b shows the spray pattern that can be achieved with this washing arm or with the washing nozzles integrated in this washing arm.

[0160] In order to spray rinse aid into the corresponding treatment zones 6, 7 during a rinse phase, the upper treatment zone 6 is designed with an upper and a lower rinse arm 18.1, 18.2. These two rinse arms 18.1, 18.2 are preferably designed as rinse arms that can be detachably connected to the corresponding wash arm 10.1, 10.2.

[0161] For this purpose, it is conceivable to use, for example, a clip mechanism as described in DE 20 2014 105 112 U1.

[0162] The lower treatment zone 7 is also provided with a rotatable rinse arm (lower rinse arm 18.4), which is also preferably detachably connectable to the corresponding wash arm 10.4.

[0163] In the upper area of ​​the lower treatment zone 7, rinse nozzles are also provided, but these are integrated in rinse arm segments 15.3 arranged in a fixed position with respect to the treatment zone 7, as can be seen in particular in the illustration in Fig. 9 can be seen.

[0164] In detail, in this exemplary embodiment, it is provided that corresponding rinse arm segments are formed on the underside of the separating element 51 designed as a separating plate, and in particular in the peripheral region of the separating element 51, in order to supply the corresponding rinse nozzles with rinse liquid as required.

[0165] The following is a description of the schematic diagram shown in Fig. The hydraulic diagram shown in Figure 11 describes a further embodiment of the dishwasher 1 designed as a programmable automatic machine.

[0166] As shown, the dishwasher 1 has a single treatment chamber 2, which is divided into an upper (main) treatment zone 6 and a lower (additional) treatment zone 7. As will be explained in more detail below with reference to the illustrations in the Fig. 12 and Fig. 15, these two treatment zones 6, 7 are spatially separated from one another by a partition 50 in such a way that when washing liquid is sprayed in one of the two treatment zones 6, 7, re-soiling in the other treatment zone 7, 6, in particular as a result thereof, is effectively prevented. As in the previously described embodiment of the dishwasher 1 according to the invention, in the Fig. 11 schematically illustrated dishwasher 1 is provided with only a single wash tank 12, which is assigned to the (single) treatment chamber 2 and thus to the two treatment zones 6, 7 together.

[0167] The wash tank 12 is located below the treatment chamber 2 of the dishwasher 1 and serves to collect the liquid sprayed in the respective treatment zones 6, 7. The capacity of the wash tank 12 is 20 to 40 liters, preferably 25 to 35 liters. Fig. In the embodiment schematically illustrated in Figure 11, this capacity is, on the one hand, sufficient for the simultaneous final rinsing operation in the two treatment zones 6, 7. On the other hand, the wash tank 12 is selected to be so small that it can still be accommodated in the reduced installation space in the machine housing compared to a conventional machine which only has a single treatment zone.

[0168] As with the previous one with reference to the illustration in Fig. 7 described embodiment is in the case of Fig. 11 schematically illustrated embodiment of the dishwasher 1, it is provided that a common washing system is assigned to the two treatment zones 6, 7. This common washing system has a (single) washing pump 13, with which washing liquid can be conveyed from the washing tank 12 via a washing liquid line system 16 to corresponding washing nozzles 11.1, 11.2. Fig. 11 washing nozzles designated with the reference number “11.1” are assigned to the upper treatment chamber 6 and aligned accordingly, while the Fig. 11 washing nozzles designated with the reference number “11.2” are assigned to the lower treatment zone 7 and are aligned accordingly.

[0169] As for example the one in Fig. In the embodiment of the dishwasher 1 according to the invention shown in Figure 4, it is provided that the lower wash arm 10.2 of the upper treatment zone 6 and the upper wash arm 10.3 of the lower treatment zone 7 are designed as a common wash arm. In other words, even in the embodiments shown in Fig. In the embodiment schematically illustrated in Figure 11, a single washing arm 10.2, 10.3 is used, which has a dual function: This common washing arm serves as the lower washing arm of the (upper) main treatment zone 6 and at the same time as the upper washing arm of the (lower) additional treatment zone 7. For this purpose, the common washing arm has washing nozzles 11.1 directed towards the upper treatment zone 6 and washing nozzles 11.2 directed towards the lower treatment zone 7.

[0170] Different embodiments of this (common) washing arm are then described with reference to the illustrations in the Fig. 13, Fig. 14 and Fig. 15 described.

[0171] In addition to this common washing arm, the upper treatment zone 6 is assigned a further washing arm 10.1, which is mounted in the upper area of ​​the treatment zone 6, preferably rotatable about a vertical axis relative to the treatment zone 6. Corresponding washing nozzles 11.1 are also formed in this washing arm 10.1.

[0172] Similarly, an additional washing arm 11.4 with corresponding washing nozzles 11.2 is provided in the lower area of ​​the lower treatment zone 7. Like the upper washing arm 10.1 of the upper treatment zone 6, the lower washing arm 10.4 of the lower treatment zone 7 is designed to be rotatable relative to this treatment zone.

[0173] At the Fig. In the embodiment of the dishwasher 1 according to the invention schematically illustrated in Figure 11, each treatment zone 6, 7 is assigned its own rinse system, so that a rinse process can be carried out independently of one another in the treatment zones 6, 7. For this purpose, each rinse system has its own rinse pump 14.1, 14.2, wherein these rinse pumps 14.1, 14.2 are each connected on the suction side to a boiler 22. Via a corresponding rinse line system 17.1, 17.2, the pressure-side outlet of the corresponding rinse pump 14.1, 14.2 is fluidly connected to the rinse nozzles 15.1, 15.2 assigned to the treatment zones 6, 7.

[0174] As will be explained below with reference to the illustrations in the Fig. 12 to 15, the rinse nozzles 15.1 assigned to the upper treatment zone 6 are each formed in a rinse arm 18.1, 18.2. These two rinse arms 18.1, 18.2 are - in contrast, for example, to the rinse arm shown in Fig. 4 schematically illustrated embodiment - assigned solely to the upper treatment zone 6.

[0175] Preferably, the rinse arms 18.1, 18.2 of the upper treatment zone 6 are designed to be rotatable relative to this treatment zone. A solution such as that described—at least in principle—in document DE 20 2014 105 112 U1 is particularly suitable for this purpose.

[0176] The rinse nozzles 15.2 assigned to the lower treatment zone 7, however, are preferably formed in rinse arms 18.2 that are arranged stationary relative to the treatment zone 7. This allows for the rinse nozzles 15.2 to be integrated into the lower treatment zone 7 in the most space-saving manner possible.

[0177] As is the case with the exploded view in Fig. 12, it is conceivable that, for example, laterally arranged (stationary) rinse arms 18.2 are provided in the lower area of ​​the lower treatment zone 7, in which the corresponding rinse nozzles 15.2 are formed.

[0178] Of course, it is also conceivable to provide the rinse arms 18.2 in other areas of the lower treatment zone 7, in particular arranged centrally, in which case the rinse nozzles 15.2 formed in the rinse arms 18.2 should be directed both upwards and downwards.

[0179] The representation in Fig. Figure 12 also shows how the partition 50, by which the upper and lower treatment zones 6, 7 are spatially separated from one another, can be designed in this exemplary embodiment. Specifically, according to this exemplary embodiment, the partition 50 comprises a separating element 51 extending essentially in a horizontal plane, which is designed such that it covers the entire effective cross-sectional area of ​​the treatment chamber 2—with the exception of a centrally arranged recess.

[0180] For this purpose, a recess 53 is provided in the rear region of the separating element 51, which is designed to fit the shaft housing 60 of the rinse aid line system or washing liquid line system.

[0181] As is particularly evident in the presentation in Fig. 13 can be removed, however, a recess is formed in the center of the separating element 51, into which a disc-shaped partition 54 can be inserted. This disc-shaped partition 54 is preferably firmly connected to the (common) wash arm and is rotatably mounted in a horizontal plane via a rinse aid or wash liquid connection 55.

[0182] Fig. 15 shows an alternative embodiment of the example in Fig. 11 schematically illustrated dishwasher 1. In this embodiment, a disc-shaped partition 54 is again used, although the common wash arm has a total of four wash arm segments.

[0183] The following is based on the illustration in Fig. 16 describes an exemplary embodiment of a user interface 110, via which an operator of the dishwasher 1 according to the invention can select at least one treatment program or corresponding treatment parameters for the first and / or second treatment zone 6, 7.

[0184] In detail, the Fig. 16 is designed as a common user interface for both treatment zones 6, 7 of the dishwasher 1. As can be seen from the illustrations in the Fig. 1 to 4, this common user interface 110 is arranged in the upper area of ​​the sliding hood 8.

[0185] Of course, the present invention is not limited to embodiments in which a common user interface 110 is used for all treatment zones 6, 7 of the dishwasher 1. In particular, it is conceivable to provide a user interface for each of the first and at least one second treatment zones 6, 7. In this case, it would be advisable to arrange the user interface 110 for the first treatment zone 6 in the upper region of the hood 8 and the user interface 110 for the at least one second treatment zone 7 above the door 9, which is designed separately from the hood 8.

[0186] As in Fig. 16, the user interface 110 is designed to provide information regarding a system status of the dishwasher 1. In the representation in Fig. 16 this is done optically via a corresponding information field 113.

[0187] Furthermore, the user interface 110 is provided with an input field 111 to enable the operator to intervene manually in a treatment cycle of the first treatment zone 6 and / or in a treatment cycle of the at least one second treatment zone 7.

[0188] In particular, the Fig.16 is provided with a first manually operable input field 114 in order to start or end a treatment cycle in the first and / or at least one second treatment zone 7, and is provided with a second input field 111 which is separate from the first input field 114 in order to call up information regarding a system status of the dishwasher 1, and / or to intervene in a treatment cycle of the first and / or at least one second treatment zone 7, and / or to call up or select program parameters for the first and / or at least one second treatment zone 7.

[0189] In summary, it is therefore evident that the solution according to the invention provides at least one additional treatment zone 7, particularly for wash ware such as cutlery or GN containers, which are generally more heavily soiled and therefore require a longer wash time. In this way, the wash performance can be improved by extending the program duration of the additional treatment zone 7, specifically as required for the type of ware to be treated in this treatment zone 7 in order to ensure a perfect wash result. In addition, despite the use of the intensive program in the additional treatment zone 7, the capacity of the main wash zone 6 is not negatively affected, i.e., not reduced.

[0190] For example, with the main treatment zone 6, five baskets can be treated with a standard treatment program, while in the lower or additional treatment zone 7, one basket is treated with an intensive treatment program at the same time, i.e. in parallel.

[0191] This means that the existing treatment zone 6 can be operated without any loss of capacity for normally soiled dishes compared to current machines, while at the same time improving the washing results for more heavily soiled dishes, as these can be cleaned in parallel in the additional treatment zone 7, for example with a special intensive treatment program.

[0192] The invention is not limited to the embodiments shown purely as examples in the drawings, but results from a synopsis of all features and aspects disclosed herein.

Claims

[1] Dishwasher (1) in the form of a commercial utensil or dishwashing machine designed as a programmer, which is constructed as a hood-type or pass-through dishwasher, wherein the dishwasher (1) has a treatment chamber (2) with at least one washing system designed as a recirculation system for spraying washing liquid in the treatment chamber (2) as required and with at least one final rinse system for spraying final rinse liquid in the treatment chamber (2) as required, wherein the treatment chamber (2) has a first treatment zone (6) and at least one further, second treatment zone (7), wherein the at least two treatment zones (6, 7) are arranged one above the other, wherein each treatment zone (6, 7) is assigned its own final rinse system, each with a final rinse pump (14.1, 14.2) and final rinse nozzles (15.1, 15.2), and wherein at least some of the final rinse nozzles (15.1, 15.2), in particular at least some of the final-rinse nozzles (15.2) assigned to the at least one second treatment zone (7) are designed as final-rinse nozzles that are stationary with respect to the corresponding treatment zone. [2] Dishwasher (1) according to claim 1, wherein the first and the at least one second treatment zone (6, 7) are assigned a common wash tank (12) in which the washing liquid to be sprayed in the treatment zones (6, 7) is collected or can be collected. [3] Dishwasher (1) according to claim 2, wherein the wash tank (12) is arranged and designed with respect to the first and with respect to the at least one second treatment zone (6, 7) such that liquid sprayed in the first treatment zone (6) and liquid sprayed in the at least one second treatment zone (7) each flow, in particular flow back, into the wash tank (12) by gravity. [4] Dishwasher (1) according to claim 2 or 3, wherein the washing system is assigned to the first and the at least one second treatment zone (6, 7) and has a washing pump system and a washing nozzle system, wherein the washing pump system is fluidly connected or connectable on the suction side to the washing tank (12) for supplying liquid collected in the washing tank (12) to the washing nozzle system as required. [5] Dishwasher (1) according to claim 4, wherein the washing nozzle system comprises a plurality of washing nozzles (11.1) assigned to the first treatment zone (6) and a plurality of washing nozzles (11.2) assigned to the second treatment zone (7), and wherein upon actuation of the washing pump system, the liquid collected in the washing tank (12) is supplied as washing liquid to both the washing nozzles (11.1) assigned to the first treatment zone (6) and the washing nozzles (11.2) assigned to the second treatment zone (7). [6] Dishwasher (1) according to claim 5, wherein at least some of the washing nozzles (11.1, 11.2), in particular at least some of the washing nozzles (11.2) assigned to the at least one second treatment zone (7), are designed as washing nozzles that are stationary with respect to the corresponding treatment zone. [7] Dishwasher (1) according to claim 6, wherein at least some of the stationary washing nozzles are formed in the partition (50) and / or in at least one washing arm which is stationary with respect to the corresponding treatment zone. [8] Dishwasher (1) according to claim 6 or 7, wherein the partition (50) has a substantially horizontally extending partition element, in particular a partition plate, arranged or arrangeable between the first and the at least one second treatment zone (6, 7), as well as a line system arranged on the partition element, wherein the line system arranged on the partition element is fluidly connected or connectable to the washing pump system, and wherein at least some of the washing nozzles formed in a stationary manner in the partition (50) are designed in the line system arranged on the partition element or are at least fluidly connected to the line system arranged on the partition element. [9] Dishwasher (1) according to one of claims 6 to 8, wherein the washing nozzles (11.1) assigned to the first treatment zone (6) are formed in an upper washing arm system (10.1) arranged in the upper region of the first treatment zone (6) and in a lower washing arm system (10.2) arranged in the lower region of the first treatment zone (6), wherein the upper and / or the lower washing arm system (10.1, 10.2) are / is designed to be rotatable with respect to the first treatment zone (6). [10] Dishwasher (1) according to one of claims 6 to 9, wherein the washing nozzles (11.2) assigned to the at least one second treatment zone (7) are formed in an upper wash arm system (10.3) arranged in an upper region of the at least one second treatment zone (7) and in a lower wash arm system (10.4) arranged in the lower region of the at least one second treatment zone (7), wherein the upper and / or the lower wash arm system (10.3, 10.4) is / are designed to be stationary with respect to the at least one second treatment zone (7). [11] Dishwasher (1) according to one of claims 1 to 10, wherein at least some of the stationary rinse nozzles are formed in the partition (50) and / or in at least one rinse arm which is stationary with respect to the corresponding treatment zone. [12] Dishwasher (1) according to one of claims 1 to 11, wherein the partition (50) has a substantially horizontally extending partition element, in particular a partition plate, arranged or arrangeable between the first and the at least one second treatment zone (6, 7), as well as a line system arranged on the partition element, wherein the line system arranged on the partition element is fluidly connected or connectable to the rinse pump (14.2) assigned to the second treatment zone (7), and wherein at least some of the rinse nozzles formed in a fixed position in the partition (50) are designed in the line system arranged on the partition element or are at least fluidly connected to the line system arranged on the partition element.

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