DE102016111132A1 - System for selectively supplying liquid to various nozzle assemblies and dishwasher with such a system - Google Patents

Abstract

More particularly, the invention relates to a system for selectively supplying liquid, particularly fresh water, to various nozzle assemblies, which are separate from each other, the system comprising a liquid distributor (70) having a liquid inlet (71), a first liquid outlet (72) and at least one further second Liquid outlet (73-78), wherein the liquid inlet (71) with a liquid source, in particular fresh water source, is fluidly connectable, wherein the first liquid outlet (72) with a first nozzle assembly (R9, R10) associated first line system (82) fluidly connected or connectable, wherein the at least one further, second fluid outlet (73-78) is fluidly connected to a second conduit system (83-86) associated with a second nozzle arrangement (R1, R8; R2, R3; R4, R5; R6, R7) is connectable, and wherein the liquid distributor (70) ausgebil det is to sequentially establish fluid communication between the fluid inlet (71) and the individual fluid outlets according to a predetermined event sequence.

Description

The present invention relates in particular to dishwashers, and especially to commercial dishware or utensil dishwashers, which are designed as program automats or conveyor dishwashers. In particular, the invention relates to dishwashers in which an automatic cleaning support is implemented in order to be able to automatically clean the dishwashers as needed.

Moreover, the present invention relates to a cleaning system for automatic interior cleaning of dishwashers, especially commercial dishwashers.

Programmers are manually loading and unloading dishwashers. The program automats may be dishwashing machines, also called "hood washers", or front loaders. Front loaders can be under-counter machines, table-top machines or freestanding front-loading dishwashers.

A dishwasher designed as a programmer usually has a treatment chamber for cleaning items to be washed. As a rule, a wash tank is arranged under the treatment chamber, in which liquid can flow back out of the treatment chamber by gravity. In the wash tank is washing liquid, which is usually water, which can optionally be supplied to cleaners.

Furthermore, a dishwasher designed as a programmer usually has a washing system with a washing pump, a line connected to the washing pump line system and a plurality of spray nozzles formed in at least one washing arm. The washing liquid located in the wash tank can be conveyed from the washing pump via the line system to the spray nozzles and sprayed by the spray nozzles in the treatment chamber on the items to be cleaned. The sprayed washing liquid then flows back into the wash tank.

Transport dishwashers are in particular belt conveyors or basket transport dishwashers. Transport dishwashers are commonly used in the commercial sector. In contrast to program machines, in which the items to be cleaned remain stationary in the machine during cleaning, transportation of the items to be washed takes place through various treatment zones of the conveyor dishwasher.

A conveyor dishwasher usually has at least one pre-wash zone and at least one main wash zone which, viewed in the transport direction of the washware, is arranged after the pre-wash zone (s). As seen in the transport direction, at least one post-wash zone and at least one final rinse zone downstream of the main wash zone (s) are generally arranged after the main wash zone (s). When viewed in the transport direction, the items to be washed either directly on a conveyor belt or in the transport direction through a feed tunnel, the subsequent prewash zone (s), main wash zone (s), post wash zone (s), rinse zone (s) , a drying zone in an outlet section.

Each of the said washing zones of the conveyor dishwasher is associated with a washing system which has a washing pump and a line system connected to the washing pump via which liquid is supplied to the spray nozzles of the washing zone. The washing liquid supplied to the spray nozzles is sprayed in the respective washing zones on the dishes, which is transported by a transport device of the conveyor dishwasher through the respective washing zones. Each washing zone is usually associated with a tank in which sprayed liquid is received and / or in which liquid is provided for the spray nozzles of the respective zones.

In the transport dishwashers usually known from the prior art, rinse liquid in the form of fresh water, which can be added pure or with further additives, such as, for example, rinse aid, is sprayed onto the dishes via the spray nozzles of the final rinse zone. Usually, at least part of the sprayed rinse liquid is transported via a cascade system counter to the transport direction of the items to be washed from zone to zone.

The sprayed rinse liquid is usually collected in a tank (Nachwaschtank) the Nachwaschzone from which it is promoted via the washing pump belonging to the Nachwaschzone washing system to the spray nozzles (Nachwaschdüsen) Nachwaschzone. Washing liquid is sprayed from the dishes in the post-wash zone. The resulting liquid flows usually in the wash tank of at least one main wash zone, which is seen in the transport direction of the dishes upstream of the post-wash zone. Here, the liquid is usually provided with a cleaner and sprayed by a belonging to the washing system of the main wash zone pump system (washing pump) via the nozzles (washing nozzles) of the main wash zone on the dishes. From the washing tank of the main washing zone, the liquid flows - if no other main wash zone is provided - usually then in the prewashing the prewash zone. The liquid in the prewash tank is sprayed onto the items to be washed via the prewash zone prewash nozzle via a pump system belonging to the prewash zone washing system in order to remove coarse contaminants from the items to be washed.

Regardless of whether the dishwasher is designed as a programmer or as a dishwasher, the herein considered and in particular commercially executed dishwashers thus usually include at least one washing system, which has a washing pump, the duration of a washing process in the treatment chamber (in program machines) or in the respective treatment zone (in conveyor dishwashers) ensures a quasi-constant water circulation performance. The respective washing pumps of the washing systems are switched on or off by a control device belonging to the dishwasher (machine control).

In addition, the dishwashers considered herein, and particularly those made commercially, typically include at least one rinse aid system to spray rinse liquid, especially fresh water, onto the wash ware for the purpose of rinsing.

At the end of each commercial rinsing day, the dishwasher will or must be cleaned. Here are a variety of manually executed steps.

To clean, for example, a conveyor dishwasher, the washing arms and the sieve systems of the individual washing systems must first be removed. Since a conveyor dishwasher generally has a plurality of washing zones arranged one behind the other and thus a corresponding multiplicity of washing systems, these working steps must be carried out several times.

The removed screening systems are then manually sprayed with warm water and additionally - depending on the degree of soiling - manually scrubbed. In the removed wash arms, the cleaning end caps usually arranged at the end of the wash arms are first removed, so that subsequently each individual wash tube of a wash arm can be flushed with water. Finally, the wash arm is completely cleaned, d. H. hosed off and manually scrubbed. The rinse aid arms are also sprayed with water and optionally scrubbed manually. In the case of rinse arms, cleaning end caps are generally not present since no soiling within the rinse aid tubes is to be expected.

The loading zone of a conveyor dishwasher, which is the most polluted treatment zone, is sprayed with warm water during the cleaning process and partially (if necessary) cleaned manually with a cleaning cloth and, if necessary, with the help of a detergent solution.

After the individual treatment zones of the conveyor dishwasher have been completely emptied, each zone is sprayed with fresh water and optionally even (if necessary) cleaned manually with a cleaning cloth and / or with the aid of a cleaning solution. For cleaning the interior also includes the inspection doors, which can be designed as sliding or folding doors. The unloading zone of the conveyor dishwasher is also to be sprayed with fresh water, even if this is usually least polluted.

The total cleaning of a conveyor dishwasher is between 30 and 40 minutes depending on the size of the machine, whereby the amount of fresh water used for machine cleaning is between 400 and 600 liters.

After carrying out the interior cleaning of the conveyor dishwasher and after cleaning the previously constructed washing system components, the individual parts of the washing systems must be re-installed in the conveyor dishwasher.

The invention has for its object to provide an automatic cleaning support for dishwashers, especially conveyor dishwashers, such as belt or basket transport dishwashers, with which to be carried out at the end of a commercial rinsing day cleaning the interior of the dishwasher can be made more efficient.

In particular, a solution is to be specified, with which at least a portion of the interior cleaning of washing machines necessary steps can be performed automatically to save staff in this way and at the same time to reduce the resources used for cleaning (water, energy, chemistry) can.

Furthermore, the invention has for its object to provide an automatic cleaning support for cleaning the interior of dishwashers, especially conveyor dishwashers, with the automatic cleaning support with the least possible space requirement and can also be implemented as inexpensively as possible with the least possible installation effort.

The object underlying the invention is achieved in particular by a cleaning system for automatic interior cleaning of dishwashers, in particular conveyor dishwashers, this cleaning system having a system for the selective supply of liquid, in particular fresh water to various, separately executed nozzle arrangements. The selective liquid supply system used in the cleaning system according to the invention is mentioned in independent claim 1, advantageous developments of which are specified in the dependent claims.

The object underlying the present invention is further achieved by the subject matter of the independent claim 21, which is directed to a system for automatic interior cleaning of dishwashers.

With regard to the dishwasher, the object underlying the invention is further solved by the subject matter of the independent claim 22.

Accordingly, the proposed automatic cleaning system is characterized in that in this cleaning system, a system for selectively supplying liquid, in particular fresh water, to different, separately running nozzle arrangements is used. This selective liquid supply system makes it possible to design the automatic cleaning support as compact, cost-effective as possible.

The invention also relates to a cleaning system for automatic interior cleaning of dishwashers, in particular commercial dishwashers, which are designed as a program automatic or transport dishwashers, wherein the cleaning system has a first cleaning nozzle arrangement and at least one further, second cleaning nozzle arrangement. The first cleaning nozzle arrangement and the at least one further, second cleaning nozzle arrangement each have at least one spray nozzle arranged or to be accommodated in the interior of the dishwasher in order to spray cleaning liquid, in particular fresh water, in particular onto the inner walls of the dishwasher for cleaning the interior of the dishwasher during cleaning operation. For this purpose, the spray nozzles of the cleaning nozzle arrangements are preferably designed as rotary nozzles in order to be able to cover the largest possible area per spray nozzle.

The corresponding spray nozzles of the first cleaning nozzle arrangement and the at least one further, second cleaning nozzle arrangement are positioned at suitable locations within the dishwasher to be cleaned, wherein in areas of greater contamination, in particular thus in the region of the loading zone in a conveyor dishwasher, a higher number of spray nozzles is provided in FIG Compared to areas of the dishwasher that are the least polluted, such as in the rinse zone in a conveyor dishwasher.

The first cleaning nozzle assembly is associated with a first conduit system, via which, if necessary, and in particular in the cleaning operation of the dishwasher the cleaning nozzles of the first cleaning nozzle assembly cleaning liquid, in particular fresh water is supplied. In the same way, the at least one further, second cleaning nozzle arrangement is associated with a corresponding second conduit system, via which cleaning liquid, in particular fresh water, can be supplied to the dishwasher in the cleaning operation of the dishwasher, if necessary, to the spray nozzles belonging to the second cleaning nozzle arrangement. Contrary to the common practice in industrial sinks practice, the system of the cleaning nozzle arrangements, however, are not directly connected to the pressure side of a corresponding feed pump for supplying cleaning liquid, especially fresh water, fluidly, since such a configuration to a high space requirement and a relatively large installation effort and would lead to high costs for the realization of the cleaning system. More specifically, a configuration in which the individual piping systems of the cleaning nozzle assemblies are fluidly directly connected to the pressure side of respective feed pumps would result in the provision of a plurality of separate valve assemblies. Furthermore, the achievable delivery rate of the feed pump would have to be designed to be correspondingly large.

In order to avoid these disadvantages, the invention provides that the cleaning system is provided with a system for the selective supply of liquid, in particular fresh water, to the various cleaning nozzle arrangements.

The selective liquid supply system comprises a liquid distributor having a liquid inlet, a first liquid outlet and at least one further, second liquid outlet. The liquid inlet of the liquid distributor can be fluidly connected to a liquid source, in particular fresh water source, while the first liquid outlet of the Liquid distributor is fluidly connected or connectable to the first nozzle system associated first conduit system, and while the at least one further, second fluid outlet of the liquid distributor with the at least one further, second cleaning nozzle associated second conduit system is fluidly connected or connectable. According to the invention, it is provided in particular that the liquid distributor is designed to produce a fluid connection between the liquid inlet and the individual liquid outlets of the fluid distributor sequentially in accordance with a predetermined event sequence.

With the solution according to the invention, and in particular by the provision of a liquid distributor for the selective supply of liquid to the different, separately arranged cleaning nozzle arrangements of the cleaning system, can in a particularly easy to implement yet effective manner an automatic cleaning support in a dishwasher, especially in a conveyor dishwasher to be implemented.

In particular, with the solution according to the invention no longer a plurality of juxtaposed, electrically actuated solenoid valves (series valves) necessary to control the individual spray nozzles of the cleaning nozzle assemblies in pairs accordingly.

The fact that it is possible to dispense with a juxtaposition of individual valves, only a smaller space requirement is required to implement the automatic cleaning support. In addition, the automatic cleaning support can be implemented with a significantly lower installation costs, since it is no longer necessary to provide a separately executed electrical control of the solenoid valves. The fact that, in addition to the usually required electrically actuated solenoid valves (at least partially) can be dispensed with, the cost of implementing the automatic cleaning assistance are minimized.

As will be explained in more detail below, the liquid distributor according to the invention, which serves for the selective supply of liquid, in particular fresh water, to the various nozzle arrangements designed separately from one another, is a compact, cost-effective and in particular hydraulically operable valve which, in particular, does not have a separate outlet electrical control can open or close several, separate liquid outlets cyclically.

Specifically, according to a preferred realization of the liquid distributor according to the invention, it is provided that the latter has a distributor housing and a switching cylinder accommodated in the distributor housing, the liquid inlet and the liquid outlets of the liquid distributor opening into the distributor housing. Preferably, the shift cylinder is movable relative to the liquid inlet and the liquid outlets and in particular mounted rotatably in the distributor housing, the fluid connection between the liquid inlet and the individual depending on the relative position or position of the shift cylinder to the liquid inlet and the liquid outlets on the switching cylinder Fluid outlets can be selectively produced.

It is conceivable in this context in particular if the distributor housing has a first housing region in which the liquid inlet opens and has an opposite second housing region in which the individual liquid outlets open, wherein the switching cylinder is rotatable, not only about its longitudinal axis relative to the distributor housing is also movable relative to the distributor housing in the axial direction of the distributor housing.

In particular, this configuration makes it possible for the shift cylinder to be mounted in the distributor housing in such a way that it can be moved from a basic position in the direction of the second housing area into a shift position by the pressure of a liquid fed into the first housing area of the distributor housing via the fluid inlet. It should be noted that the terms "base position" and "shift position" used herein refer to the position of the shift cylinder in the axial direction of the distributor housing, but not the rotational position, d. H. take into account the rotation of the shift cylinder about its longitudinal axis, which points in the axial direction of the distributor housing.

In the latter embodiment, it is advantageous if in the distributor housing further comprises a return mechanism, for example in the form of a return spring, to reset the shift cylinder back to its original position when the pressure of the liquid fed into the first housing portion a predetermined or definable Value falls below. In other words, the shift cylinder is preferably mounted in the distributor housing so that it is in the switching position on the second housing portion, when the liquid inlet of the distributor housing is fluidly connected to the liquid source, in particular fresh water source, while the shift cylinder due to the return mechanism back into his Basic position in the first housing portion of the distributor housing returns when the fluid connection between the liquid inlet of the distributor housing and the fluid source has been interrupted or throttled sufficiently.

According to one aspect of the present invention, the liquid distributor is provided with a kind of "revolver" mechanism, ie a mechanism in which the shift cylinder is always rotated at a predetermined or definable angular amount about its longitudinal axis when the shift cylinder moves from its home position on the first Housing portion to the switching position on the second housing portion and has moved back. In this way - depending on the rotational position of the shift cylinder relative to the distributor housing and in particular relative to the second housing portion of the distributor housing - a fluid connection between the liquid inlet and a first of the at least two liquid outlets of the liquid distributor can be produced. By subsequently moving the shift cylinder from the home position to the shift position and back, as a result of which the shift cylinder rotates again about its longitudinal axis at a predetermined or determinable angle, fluid communication is established between the fluid inlet and a second of the at least two fluid outlets of the fluid manifold.

In order to achieve this functionality, it is conceivable according to one aspect of the invention if the shift cylinder has a first area facing the first housing area and an opposite second area facing the second housing area, wherein the first area of the shift cylinder has a first tooth mechanism cooperating with the first housing area and the second portion of the shift cylinder is associated with a cooperating with the second housing portion second toothed mechanism.

It is conceivable in this context, in particular, if the switching cylinder is designed at least partially sleeve-shaped at its first and / or second region, wherein in this sleeve-shaped region at least partially a sprocket may be formed. In this context, it is also advantageous if provided in the first and / or second housing portion complementary to the sprocket teeth formed. In this way it can be achieved that the switching cylinder rotates in its movement from the basic position to the switching position and back with a predetermined or definable angle amount about its longitudinal axis.

Of course, other mechanisms come into question, such as a mechanism that is based on the snap-action mechanism used in pressure ballpoint pens. Since this latching mechanism should be well known for decades, it will be omitted here to describe the structure and operation of the locking mechanism of ballpoint pens in more detail.

In a preferred embodiment of the system according to the invention for the selective supply of liquids to different nozzle arrangements, in particular cleaning nozzle arrangements, a sensor device is provided, which is designed to detect that liquid outlet which is in fluid communication with the liquid inlet of the liquid distributor. Conceivable in this context, it is, for example, when the sensor device is designed to detect the rotational position of the shift cylinder relative to the distributor housing and in particular relative to the second housing portion of the distributor housing. On the other hand, since the switching cylinder is designed to establish a fluid connection between the liquid inlet and a (individual) of the liquid outlets in its switching position, it can be deduced at least indirectly from the rotational position of the switching cylinder relative to the second housing region of the distributor housing to the liquid outlet connected to the liquid inlet of Liquid distributor is in fluid communication.

For this purpose, the sensor device has at least one REED sensor assigned to the liquid distributor in a particularly easily realizable but nevertheless effective manner.

With regard to the liquid source with which the liquid inlet of the liquid distributor is fluidically connectable, it should be noted that the liquid source preferably has a fresh water mains connection and in particular is formed by a fresh water mains connection.

Alternatively or additionally, however, it is also conceivable in this connection if the liquid source has a tank, in particular a fresh water tank, which has an outlet which is connected or connectable to the suction side of a feed pump, in particular a fresh water pump. If required, this tank can be filled with fresh water via the fresh water mains connection.

In this embodiment it is advantageous if the liquid inlet of the liquid distributor is in fluid communication with the pressure side of the Feed pump is connected or connectable. In a particularly preferred embodiment of the solution according to the invention, in which the automatic cleaning system or the liquid distributor is used in a dishwasher, in particular conveyor dishwasher, a valve arrangement is additionally provided to provide a fluid connection between the liquid inlet of the liquid distributor and the liquid source or the Produce pressure side of the liquid source associated feed pump. The valve assembly is preferably designed such that, if necessary, the liquid inlet of the liquid distributor connected in fluid communication with the liquid source or the pressure side of the feed pump associated with the liquid source or the liquid source or the pressure side of the feed pump associated with the liquid source directly, ie without the interposition of the liquid distributor, in terms of flow a not supplied via the liquid distributor with liquid supply line system is connected.

This line system, which can not be supplied with liquid via the liquid distributor, is, in particular, the line system of a rinsing system of a dishwasher, in particular a conveyor dishwasher. This line system is associated with a nozzle arrangement with spray nozzles (rinse nozzles), if necessary, d. H. in particular, when the dishwasher is not in the cleaning operation to spray the via the valve assembly directly to the line system of the rinsing system supplied liquid (final rinse liquid) in the fresh water rinsing zone.

The invention relates not only to a system for automatic cleaning of the interior of a dishwasher or a system for selectively supplying liquid, especially fresh water, to different, separately running nozzle arrangements, in particular cleaning nozzle arrangements, but also a dishwasher, in particular commercial conveyor dishwasher, wherein the Cleaning system according to the invention is implemented.

In particular, the invention thus also relates to a dishwasher with a fresh water rinsing system for fresh water rinsing of items to be washed and a cleaning system for the required internal cleaning of the dishwasher. The fresh water rinsing system has a rinse nozzle arrangement with at least one rinse aid nozzle and a rinse aid system associated with the rinse nozzle arrangement. This rinse aid system is, if necessary, d. H. in particular, when the dishwasher is not in the cleaning operation and a fresh water rinse is to be performed, fluidly connected directly to the fresh water source or the pressure side of the fresh water source associated feed pump and in particular without interposition of the liquid distributor.

The cleaning system of the dishwasher according to the invention has a first cleaning nozzle arrangement with a first conduit system associated with the first cleaning nozzle arrangement and at least one further, second cleaning nozzle arrangement with at least one second conduit system assigned to at least one further, second cleaning nozzle arrangement.

These at least two piping systems are selectively connected to the supply of the corresponding cleaning nozzle arrangements with liquid, in particular fresh water, via the liquid distributor and if necessary with the liquid source (in particular fresh water source) or with the pressure side of the feed pump assigned to the liquid source.

Hereinafter, exemplary embodiments of the inventive solution will be described in more detail with reference to the accompanying drawings.

In the drawings show:

1 schematically a dishwasher designed in the form of a conveyor dishwasher for explaining the general structure and operation of such a dishwasher;

2 a hydraulic diagram of an exemplary embodiment of the cleaning system according to the invention for automatic interior cleaning of a dishwasher, in particular conveyor dishwasher; and

3a -D isometric exploded views of an exemplary embodiment of an example in the cleaning system according to 2 usable liquid distributor.

1 shows a conveyor dishwasher 2 as an example of a dishwasher in which the cleaning system according to the invention for automatic interior cleaning can be implemented. Although the following description of the figures primarily refers to dishwashers which are designed as conveyor dishwashers, it should be emphasized that the cleaning system according to the invention is equally suitable for the automatic interior cleaning of dishwashers which are designed as program automats. Accordingly, their liquid distributor according to the invention is also suitable for use in dishwashers designed as program automats.

In the 1 for explaining the general structure and operation of a conveyor dishwasher schematically illustrated dishwasher 2 has a transport device 4 for transporting in 1 not shown items to be washed in a transport direction 8th through the conveyor dishwasher 2 on. The conveyor dishwasher 2 further comprises at least one washing zone, for example as in 1 shown, a prewash zone 12 and a main wash zone 14 which are in the transport direction 8th seen after the prewash zone 12 is arranged.

In transport direction 8th seen, is after the at least one washing zone 12 . 14 a post-wash zone 16 and after the post-wash zone 16 at least one rinse zone, for example, as shown, only a single fresh water rinse zone 18 arranged. At the fresh water rinse zone 18 joins the in 1 schematically illustrated transport dishwasher 2 in the transport direction 8th seen the washware a drying zone 40 at. The respective zones 12 . 14 . 16 . 18 . 40 the conveyor dishwasher 2 can be over curtains 47 be separated from each other.

At the in 1 schematically illustrated embodiment is also the inlet tunnel 10 even over a curtain 47 from the enema 11 separated. By providing the curtains 47 are an overspray of washing liquid and rinse liquid and the escape of vapors from the conveyor dishwasher 2 prevented.

The mentioned treatment zones 12 . 14 . 16 . 18 the conveyor dishwasher 2 are spray nozzles 20 . 22 . 24 . 26 . 28 . 30 assigned. These spray nozzles 20 . 22 . 24 . 26 . 28 . 30 serve to spray liquid on the items to be washed, if this from the transport device 4 through the respective treatment zones 12 . 14 . 16 . 18 is transported. The individual spray systems of the treatment zones 12 . 14 . 16 . 18 ensure that the items to be treated are hosed off both from the top and from the bottom.

At the in 1 schematically illustrated transport dishwasher 2 indicates the fresh water rinse zone 18 but not just downwardly directed top spray nozzles 20 and upwardly directed lower spray nozzles 22 , but also lateral spray nozzles 24 on each side of the transport device 4 on. The use of lateral spray nozzles 24 allows a targeted spraying of the items to be washed (dishes) with rinse aid even in shadow zones. Especially with fully loaded transport system, ie plate-to-plate loading of the dish carrier, the use of lateral spray nozzles 24 in the fresh water rinse zone 18 a clear advantage in terms of rinse aid result (effective rinsing of detergent residues on dish surfaces even in shadow zones) compared to systems in which in the fresh water rinse zone 18 only upper and lower spray nozzles 20 . 22 and no lateral spray nozzles 24 are provided.

The post-wash zone 16 , Main wash zone 14 and prewashing zone 12 are also tanks (Nachwaschtank 32 , Main wash tank 34 , Pre-wash tank 36 ) associated with receiving sprayed liquid and / or providing liquid to the spray nozzles 26 . 28 . 30 the treatment zones concerned 14 . 16 . 18 ,

At the in 1 schematically illustrated transport dishwasher 2 For example, rinse liquid (final rinse liquid), which is composed of fresh water with added rinse aid, is applied above and below the transport device 4 and laterally arranged spray nozzles 20 . 22 . 24 the fresh water rinse zone 18 sprayed on the dishes, not shown. Part of the sprayed rinse liquid is via a cascade system against the transport direction 8th of the ware transported from treatment zone to treatment zone. The remaining part of the fresh water rinse zone 18 sprayed rinse liquid is via a valve V1 and a bypass line 38 directly into the pre-wash zone 12 assigned pre-wash tank 36 directed.

In the cascade system flows from the rinse nozzles 20 . 22 . 24 sprayed rinse liquid by gravity from the fresh water rinse zone 18 in the post-wash zone 16 associated rinse tank 32 , The from the Nachwaschtank 33 collected in the fresh water rinse zone 18 sprayed rinse liquid is then using a Nachwaschpumpe 45 to the spray nozzles (Nachwaschdüsen 25 ) of the post-wash zone 16 promoted. In the post-wash zone 16 Washing liquid is rinsed from the dishes. The resulting liquid (Nachwaschflüssigkeit) flows by gravity into the main wash zone 14 associated main tank 34 , Preferably, this is a drain element 39 , For example, a drain tray or baffle provided, which the of the Nachwaschdüsen 26 sprayed after washing liquid into the main washing tank 34 passes.

According to another embodiment, not shown in the drawings, the drainage element 39 omitted when the main tank 34 until under the Nachwaschdüsen 26 the post-wash zone 16 extends.

The one from the main tank 34 the main washing zone 14 absorbed liquid is Usually provided with a detergent (English: detergent) and with the help of a main wash pump 35 via the spray nozzles (main washing nozzles 28 ) of the main washing zone 14 sprayed on the dishes. The ones with the main washing nozzles 28 Sprayed washing liquid flows by gravity into the main tank 34 back.

The main tank 34 is via an overflow line 37 with the pre-wash zone 12 assigned pre-wash tank 36 in fluid communication. About this overflow line 37 gets into the main wash zone 14 sprayed washing liquid into the prewash tank 36 if there is a sufficient amount of washing liquid in the main tank 34 is included.

The in the prewash tank 36 the prewashing zone 12 absorbed liquid is then with the help of a Vorwaschpumpe 33 via the spray nozzles (pre-wash nozzles 30 ) of the prewashing zone 12 sprayed on the dishes to remove coarse contaminants from the dishes. The with the pre-wash nozzles 30 sprayed washing liquid flows by gravity into the pre-wash tank 36 back.

The pre-wash tank 36 is with an overflow pipe 31 provided, which serves when exceeding a liquid level in the prewash tank 36 to supply the excess amount of liquid as waste water to a heat treatment device.

As already indicated, this contains in the main wash zone 14 and in the prewashing zone 12 sprayed liquid preferably cleaner, which, for example, in the Hauptwaschtank 34 the main washing zone 14 absorbed liquid by means of a (not shown in the drawings) Reinigerzudosiervorrichtung is metered.

As already mentioned, the fresh water rinse zone follows 18 in the transport direction 8th the ware seen the drying zone 40 at. In the drying zone 40 the items to be washed are dried with dry and heated air in order to blow off or dry off the moisture present on the items to be washed. In order to keep the moisture content of the air in a favorable range for drying, it is conceivable, for example, via an opening, such as through the outlet opening for the items to be washed, the drying zone 40 to supply room air from outside.

The warm and humid air in the drying zone 40 Then, for example, with the help of a blower 41 via another opening from the drying zone 40 deducted. It is advantageous if the exhaust air flow from the drying zone 40 An institution 42 for heat recovery happens in which, for example, a capacitor may be provided. The device 42 for heat recovery serves to recover at least a portion of the heat energy contained in the process.

If before the first start of the conveyor dishwasher 2 the washing zones 12 . 14 and 16 assigned tanks (pre-wash tank 36 , Main wash tank 34 , Nachwaschtank 32 ) empty or insufficiently filled, they must first on a fresh water line 48 and / or by spraying rinse-aid liquid in the fresh-water rinse-aid zone 18 be filled. The fresh water pipe 48 is connectable via a controllable valve V3 with a fresh water supply network. The in the main wash zone 14 and in the prewashing zone 12 available amount of washing liquid can each with the help of a in the Hauptwaschtank 34 provided level sensor or with the help of one in the prewash tank 36 provided level sensor monitors and a control device 50 be reported.

The fresh water rinse zone 18 can - as in 1 shown - a fresh water tank 44 be assigned to the intermediate storage of at least a portion of the intended for the rinse fresh water. The fresh water tank 44 on the one hand provided with a fresh water connection, which is connectable via a controllable fresh water supply valve V2 to a fresh water supply network, and on the other hand to the suction side of a rinse aid 43 connected. Of course, it is also conceivable to a fresh water tank 44 to dispense with temporarily storing at least a portion of the fresh water provided for the final rinse and the fresh water supply valve V2 directly to the suction side of the rinse aid 43 connect to.

Also, it is not mandatory, a rinse pump 43 provided. Rather, it is also possible, for example, to use the pressure from the fresh water line network in order to use this as a final rinse liquid in the fresh water final rinse zone 18 to be sprayed fresh water the rinse nozzles 20 . 22 . 24 supply.

At the in 1 schematically illustrated transport dishwasher 2 however, there is a rinse pump 43 used, the pressure side of a conduit system with a water heater 9 ("Boiler") is connected. The line system is designed such that the of the rinse pump 43 to the spray nozzles 20 . 22 . 24 the fresh water rinse zone 18 initially pumped liquid the device 42 for heat recovery happens, in which at least part of the thermal energy the exhaust air discharged from the conveyor dishwasher for heating the spray nozzles 20 . 22 . 24 the fresh water rinse zone 18 supplied liquid is used.

The rinse pump 43 either directly from the fresh water supply valve V2 or from the fresh water tank 44 fresh water supplied is rinse aid by means of a rinse aid dosing device containing a rinse aid pump 6 has, added. In a preferred manner, the rinse aid dosing device is arranged such that the addition of rinse aid to the fresh water takes place at a position at which the fresh water has not yet been heated. Investigations have shown in this context that a much better and more uniform mixing of the rinse aid with the fresh water takes place when the rinse aid is added to unheated fresh water.

Specifically, the addition of rinse aid in fresh water should preferably take place, which has a temperature of less than 40 ° C, and preferably less than 30 ° C.

Therefore, at the in 1 schematically illustrated embodiment of the conveyor dishwasher 2 the rinse aid metering between the rinse aid 43 and the water heater 9 or the institution 42 for heat recovery and the heat exchanger device 60 instead of. In 1 is the controller 50 the conveyor dishwasher 2 indicated only schematically. In the control device 50 Preferably, a plurality of predetermined or definable sequence programs are stored. For this purpose, the control device 50 a corresponding memory device, wherein this is preferably a random access memory (RAM). Each of the sequence programs defines those for the treatment of the items to be washed in the different treatment zones of the conveyor dishwasher 2 set process parameters, in particular the temperature, in particular minimum temperature, in the prewash zone 12 to be sprayed washing liquid in the main wash zone 14 to be sprayed washing liquid in the post-wash zone 16 to be sprayed liquid and / or in the fresh water rinse zone 18 to be sprayed rinse liquid.

For this purpose, it is preferred if in the pre-wash zone 12 assigned pre-wash tank 36 in which the main washing zone 14 associated main tank 34 and / or in the post-wash zone 16 associated rinse tank 32 a corresponding heater 55 . 56 . 58 is arranged to the in the tank in question 32 . 34 . 36 collected liquid according to a selected sequence program to temper. The mentioned heaters 55 . 56 . 58 are from the controller 50 accordingly controllable.

Further, a heater 57 of the water heater 9 from the controller 50 be controlled accordingly, if necessary, the temperature, in particular minimum temperature, in the fresh water rinse zone 18 readjusting the rinse liquid to be sprayed, the rinse liquid to be sprayed should after passing through the device 42 for heat recovery is not yet sufficiently tempered.

Hereinafter, referring to the illustration in FIG 2 an exemplary embodiment of a cleaning system for automatic interior cleaning of a dishwasher, in particular a designed as a dishwasher dishwasher described in more detail. In detail shows 2 a hydraulic diagram of the exemplary embodiment of the cleaning system according to the invention.

As in 2 indicated, the cleaning system according to the invention is particularly suitable for implementation in a conveyor dishwasher, which are different in the transport direction 8th of the items to be washed has successively arranged treatment zones.

According to the hydraulic scheme after 2 In this exemplary embodiment, the conveyor dishwasher is shown 2 a fresh water rinse zone 18 , a post-wash zone 16 , a main wash zone 14 , a prewashing zone 12 as well as an inlet tunnel 10 on.

The construction and functioning of these treatment zones or areas have already been described with reference to the illustration in FIG 1 described so that for purposes of repetition on these points will not be discussed here. Rather, the description of the figures concentrates on the hydraulic scheme according to FIG 2 on the structure and operation of the cleaning system according to the invention for automatic interior cleaning.

It should be noted at this point, however, that in the hydraulic scheme according to 2 once again the fresh water rinse zone 18 associated rinse system is located.

This rinse aid system has rinse nozzles 20 . 22 in the fresh water rinse zone 18 arranged and on the in this treatment zone with fresh water clear wash dishes (not in 2 shown) are aligned.

The fresh water rinse nozzles 20 . 22 are via a piping system (rinse aid system 60 ) fluidly connectable to a fresh water source. In the rinse aid system 60 is a water heater 9 ("Boiler") provided to the about the fresh water rinse nozzles 20 . 22 to heat to be sprayed fresh water to the desired process temperature. Downstream of the water heater 9 is a facility 42 intended for heat recovery. In this facility 42 for heat recovery, at least part of the thermal energy of the transport dishwasher 2 discharged exhaust air for heating the rinse nozzles 20 . 22 the fresh water rinse zone 18 used liquid supplied.

At the schematic in 2 shown transport dishwasher 2 the fresh water source has a fresh water mains connection and a fresh water tank 44 on. By driving a corresponding valve V2 of the fresh water tank 44 if necessary, filled with fresh water from the fresh water mains connection. This is either fresh water, which was taken directly from the fresh water mains connection, or correspondingly pretreated fresh water, in particular demineralized fresh water.

The fresh water tank 44 is in flow with the suction side of a supply pump (fresh water pump or rinse pump 43 ) connected. The pressure side of the rinse aid 43 is via a corresponding of a control device 50 controllable valve V4 with the rinse aid system 60 fluidly connectable to the flushing operation of the conveyor dishwasher 2 Washware in the fresh water rinse zone 18 be able to rinse.

As in 2 schematically indicated, it is conceivable in this context that between the pressure side of the rinse aid 43 and the valve V4, a corresponding check valve V6 is arranged.

In the rinsing mode of the conveyor dishwasher 2 is usually the valve V4 open to preferably continuously or, if necessary, the fresh water rinse nozzles 20 . 22 Fresh water to be supplied, which before spraying in the fresh water rinse zone 18 over the water heater 9 and / or the device 42 was heated accordingly for heat recovery.

In the cleaning operation of the conveyor dishwasher 2 On the other hand, it is provided that the valve V4 is closed, so that the fluid connection between the fresh water rinse nozzles 20 . 22 and the fresh water source or the pressure side of the rinse aid 43 is disconnected. The cleaning operation of the dishwasher usually takes place at the end of a rinsing day, that is, when the conveyor dishwasher 2 not used for cleaning items.

As already mentioned, it is in the cleaning operation of the dishwasher 2 especially necessary that the interior of the dishwasher is carefully sprayed with cleaning fluid, especially fresh water. To come to this - as in 2 schematically indicated - a plurality of cleaning nozzles R1 to R10 are used, which are preferably designed as rotary nozzles, to spray the inner surfaces of the conveyor dishwasher 2 but also to a rinsing one to the device 42 To allow for heat recovery associated condenser.

In particular, for cleaning the conveyor dishwasher 2 , And in particular for cleaning the interior with the aid of the cleaning system according to the invention, the valve V4 closed and the pressure side of the rinse aid 43 fluidly with the fluid inlet 71 a liquid distributor 70 connected. For this purpose, a between the liquid inlet 71 of the liquid distributor 70 and the pressure side of the rinse pump 43 provided valve V5 open.

The liquid distributor 70 in addition to the already mentioned liquid inlet 71 a variety of fluid outlets (at the in 2 schematically illustrated embodiment a total of seven liquid outlets 72 to 78 ) on. The first fluid outlet 72 is via a first line system 82 fluidically connected to a first cleaning nozzle assembly, said first cleaning nozzle assembly comprising the cleaning nozzles R9 and R10, which in the post-wash zone 16 or in the main wash zone 14 are arranged. The second fluid outlet 73 of the liquid distributor 70 is via a second pipe system 83 fluidly connected to a second cleaning nozzle assembly, said second cleaning nozzle assembly comprising the cleaning nozzles R1 and R8, which in the prewash zone 12 or in the inlet tunnel 10 are arranged.

The third fluid outlet 74 of the liquid distributor 70 is via a third line system 84 fluidly connected to a third cleaning nozzle assembly, the third cleaning nozzle assembly comprising the cleaning nozzles R2 and R3, which are arranged in the upper region of the second main wash zone.

The fourth fluid outlet 75 of the liquid distributor 70 is over a fourth pipe system 85 fluidly with a fourth Cleaning nozzle assembly, which includes the union nozzles R4 and R5, which in the main wash zone 14 (here: in the upper area) are arranged.

In the same way is the fifth liquid outlet 76 of the liquid distributor 70 via a fifth line system 86 connected in fluid communication with a fifth cleaning nozzle assembly consisting of the cleaning nozzles R6 and R7. The cleaning nozzle R6 is here in the post-wash zone 16 arranged while cleaning nozzle R7 to clean the condenser of the device 42 is assigned for heat recovery.

As described in detail below with reference to the isometric exploded views in the 3a to 3d is described in more detail, is the liquid distributor 70 formed according to a predetermined event sequence, a fluid connection between the liquid inlet and the individual liquid outlets 72 to 78 to produce sequentially. The remaining fluid outlets 77 and 78 the liquid distributor are in the in 2 The hydraulic diagram shown is not fluidly connected to corresponding piping systems, but closed accordingly (eg., With the help of a blind cover or a blind piping). Depending on the machine configuration, a different number of cleaning nozzles may be necessary, so that in the hydraulic scheme according to 2 sealed fluid outlets 77 . 78 If necessary, additional cleaning nozzle arrangements can be assigned.

Essential in this context is that the liquid distributor 70 is formed, in the cleaning operation of the conveyor dishwasher 2 sequentially fluid communication between the liquid inlet 71 and the individual fluid outlets 72 to 78 manufacture. The sequential establishment of the fluid connection is necessary insofar as the performance (flow and pressure) of the fresh water pump 43 usually not sufficient to simultaneously all cleaning nozzles R1 to R10 with liquid (fresh water) to supply, so that the cleaning nozzles R1 to R10 groups, especially in pairs in a set program sequence are to be controlled.

As will be described in more detail below with reference to the exploded isometric views of an exemplary embodiment of the fluid distributor of the invention 70 is performed closer, takes over the fluid manifold 70 the task of supplying the different cleaning nozzle groups or cleaning nozzle pairs sequentially with liquid (fresh water). In detail, the liquid distributor 70 designed, sequentially the individual fluid outlets 72 to 78 fluidly with the fluid inlet 71 the liquid distributor, and thus - at least in the cleaning operation of the dishwasher, that is, when the valve V5 is open and the valve V4 is closed - with the pressure side of the rinse aid 43 connect to. Here is the liquid distributor 70 designed to always switch on by one position, in particular by turning on and off the rinse pump 43 a pressure fluctuation in the system, and in particular at the liquid inlet 71 of the liquid distributor 70 is produced. This pressure fluctuation at the liquid inlet 71 of the liquid distributor 70 causes the liquid distributor 70 to advance one position and the liquid inlet 71 of the liquid distributor 70 fluidly connected to a subsequent fluid outlet. By switching the rinse pump on and off several times 43 Thus, all Reinigungsdüsengruppierungen or cleaning nozzle pairs are driven sequentially.

Thus the control device 50 When starting the operation, it is possible to see in which position the liquid distributor 70 stands, a position query is provided in the exemplary embodiment of the cleaning system according to the invention. This is realized in particular via a magnetically actuated reed contact. When the startup is then the rinse pump 43 as long as turned on and off until the liquid distributor 70 has reached its starting position. This starting position is present when the reed contact is closed.

Hereinafter, with reference to the isometric exploded views according to FIGS 3a to 3d the structure and operation of an exemplary embodiment of the liquid distributor 70 described in more detail.

As it is in particular the representation in 3a can be removed, the exemplary embodiment of the inventive liquid distributor 70 a distributor housing 90 and one in the distributor housing 90 recorded shift cylinder 91 on. In the illustrated exemplary embodiment, the manifold housing is 90 essentially constructed of two housing parts, namely a first housing portion 90-1 and a second housing portion 90-2 , In the first housing area 90-1 the liquid inlet opens 71 of the liquid distributor 70 , In the second housing area 90-2 , which is opposite to the first housing portion 90-1 is arranged open the liquid outlets 72 to 78 of the liquid distributor 70 , As in the 3a to 3d indicated in this exemplary embodiment of the liquid distributor 70 provided that the liquid inlet 71 at a first end face of the substantially cylindrical distribution housing 90 is provided while the liquid outlets 72 to 78 on a second end face of the distributor housing 90 are provided.

Inside the distributor housing 90 is the already mentioned switching cylinder 91 added. In detail is in the in the 3a to 3d shown exemplary embodiment of the liquid distributor according to the invention 70 provided that the shift cylinder 91 not only relative to the distributor housing 90 in the axial direction of the distributor housing 90 is movable, but also relative to the distributor housing 90 around the longitudinal axis of the shift cylinder 91 is rotatable.

The shift cylinder 91 more specifically, in the manifold housing 90 stored this by pushing one over the liquid inlet 71 in the first housing area 90-1 fed liquid (especially fresh water) from a basic position in the direction of the second housing portion 90-2 is movable in a switching position. As in particular the isometric exploded view in 3a can be removed, the exemplary embodiment of the inventive liquid distributor 70 Further, a return mechanism in the form of a return spring 92 on. The return spring 92 serves to the shift cylinder 91 to return to its basic position when the pressure in the first housing area 90-1 supplied liquid (fresh water) falls below a predetermined or definable value.

The shift cylinder 91 is especially in the in the 3a to 3d The exemplary embodiment shown is configured to rotate about its longitudinal axis as it travels from the home position to the shift position and backward at a predetermined or settable angle. In this way, for example, by switching on and off the rinse pump 43 and by the resulting pressure fluctuation at the liquid inlet 71 of the liquid distributor 70 ensures that the switching cylinder at each (sufficient) pressure fluctuation its rotational position relative to the distributor housing 90 in particular relative to the second housing portion 90-2 changed. Depending on the rotational position of the shift cylinder relative to the second housing portion 90-2 becomes a fluid connection between the liquid inlet 71 and one of the various fluid outlets 71 to 78 of the liquid distributor 70 produced.

As in detail in particular the in 3b shown section, has in the exemplary embodiment of the liquid distributor shown here 70 the shift cylinder 91 one the first housing area 90-1 facing first portion and an opposite and the second housing portion 90-2 facing the second region, wherein the first region of the shift cylinder 91 one with the first housing area 90-1 cooperating first gear mechanism and the second portion of the shift cylinder 91 one with the second housing area 90-2 associated cooperating second tooth mechanism. This can - as in the 3a to 3d indicated - the shift cylinder 91 be sleeve-shaped at least partially in its first and second region, wherein in the sleeve-shaped region a corresponding sprocket 93 . 94 is trained.

On the other hand, the first housing area 90-1 complementary to the sprocket 93 trained spikes 95 and in the second housing area 90-2 complementary to the sprocket 94 trained spikes 96 intended. In this way is in the liquid distributor 70 implements a mechanism commonly referred to as a "turret" mechanism, and is known as a detent mechanism of ballpoint pens.

In 3a and 3d is also indicated how a sensor device can be realized to those liquid outlet 72 to 78 of the liquid distributor 70 to capture, with the liquid inlet 71 of the liquid distributor 70 is in fluid communication. In detail is in the in the 3a to 3d shown exemplary embodiment provided that the sensor device is formed, the rotational position of the shift cylinder 91 relative to the distributor housing 90 capture. For this comes a corresponding, the liquid distributor 70 assigned REED sensor used.

The functional description of the liquid distributor according to the invention 70 can thus be summarized as follows:
The liquid distributor 70 consists essentially of two housing parts (first housing area 90-1 and second housing area 90-2 ) with line connections, in particular hose connections, which the liquid inlet 71 as well as the various fluid outlets 72 to 78 of the liquid distributor 70 define. In addition, a seal 97 provided to the two housing parts (first and second housing area 90-1 and 90-2 ) fluid-tight connect.

Inside the distributor housing 90 is a movable shift cylinder 91 and a return spring 92 intended. In addition, it is beneficial if the liquid distributor 70 is provided with a reed contact and a corresponding magnet.

According to the illustrated in the drawings preferred embodiment of the liquid distributor according to the invention 70 is the liquid inlet 71 of the liquid distributor 70 on the front side of the first housing area 90-1 arranged while the liquid outlets 72 to 78 on the front side of the opposite second housing area 90-1 are provided. Both housing parts (first and second housing area 90-1 . 90-2 ) are preferably bolted together and through the seal 97 sealed.

The shift cylinder 91 becomes due to the building up fluid pressure against the second housing area 90-2 pressed. In this position, an overflow opening in the switching cylinder covers one of the liquid outlets 72 to 78 of the second housing area 90-2 , The liquid (especially fresh water) can thus from the liquid inlet 71 through the shift cylinder 91 to the corresponding liquid outlet 72 to 78 flow. If the fluid pressure drops at the fluid inlet 71 of the liquid distributor 70 off, the shift cylinder 91 through which is between him and the second case area 90-2 tensioned return spring 92 in the direction of the first housing area 90-1 pressed down.

Because both the inside of the first and second housing area 90-1 and 90-2 as well as the two end faces of the shift cylinder 91 each have a serrated shape (crown), the shift cylinder rotates 91 during up and down movements relative to the distributor housing 90 around its longitudinal axis (turret principle). The geometry of the housing areas 90-1 and 90-2 provided spikes 95 . 96 or the geometry of the teeth in the tooth boundaries 93 . 94 is designed so that the overflow opening in the shift cylinder 91 after an up and down movement exactly with the next liquid outlet of the plurality of liquid outlets 72 to 78 covered. The liquid distributor 70 Thus, by switching on and off a pump or by the pressure fluctuation thus generated can be cyclically switched from a liquid outlet to a next liquid outlet.

To ensure the timing of the cleaning program, the respective liquid outlets 72 to 78 be switched in the right order. At the start of operation of the dishwasher 2 must the controller 50 (Machine control) can therefore recognize in which position the shift cylinder 91 of the liquid distributor 70 stands and take a defined starting position. This is realized via a magnetically actuated reed contact, which in one in the first housing area 90-1 provided hole or pocket 98 can be inserted. During the engine startup phase, the rinse pump becomes 43 as long as off and on, until in the shift cylinder 91 located magnet 99 closes the reed contact. The liquid distributor 70 or the shift cylinder 91 of the liquid distributor 70 has thus reached its starting position.

It can therefore be seen that the liquid distributor according to the invention, which is based on the turret principle or the snap-in principle known from pressure-operated ballpoint pens, has a plurality of liquid outlets 72 to 78 can be switched cyclically without electrical control. The simple principle of the liquid distributor 70 allows in particular a compact and inexpensive construction.

The invention is not limited to the exemplary embodiments shown in the drawings, but results from a synopsis of all the features disclosed herein.

Claims (23)

System for the selective supply of liquid, in particular fresh water, to various nozzle arrangements which are made separately from one another, the system comprising a liquid distributor ( 70 ) with a liquid inlet ( 71 ), a first liquid outlet ( 72 ) and at least one further, second liquid outlet ( 73 - 78 ), wherein the liquid inlet ( 71 ) is fluidly connectable to a fluid source, in particular fresh water source, the first fluid outlet ( 72 ) with a first nozzle system (R9, R10) associated with the first conduit system ( 82 ) is fluidly connected or connectable, wherein the at least one further, second fluid outlet ( 73 - 78 ) with a second line system (R1, R8, R2, R3, R4, R5, R6, R7) associated with a second nozzle arrangement ( 83 - 86 ) is fluidly connected or connectable, and wherein the liquid distributor ( 70 ) is formed, according to a predetermined event sequence, a fluid connection between the liquid inlet ( 71 ) and the individual liquid outlets sequentially.  System according to claim 1, wherein the liquid source has a fresh water mains connection and in particular is formed by a fresh water mains connection. A system according to claim 1 or 2, wherein the liquid source is a tank ( 44 ), in particular fresh water tank, which one with the suction side of a feed pump ( 43 ), in particular fresh water pump, fluidly connected or connectable outlet. A system according to claim 3, wherein the liquid inlet ( 71 ) of the liquid distributor ( 70 ) in fluid communication with the pressure side of the feed pump ( 43 ) is connected or connectable. A system according to any one of claims 1 to 4, wherein a valve arrangement (V4, V5) is provided for connecting the fluid inlet as required and in fluid communication ( 71 ) of the liquid distributor ( 70 ) with the liquid source and in particular with the pressure side of a feed pump associated with the liquid source ( 43 ). System according to claim 5, wherein the valve arrangement (V4, V5) is formed, if necessary, the liquid inlet ( 71 ) of the liquid distributor ( 70 ) in terms of flow with the liquid source and in particular with the pressure side of the feed pump ( 43 ) or the liquid source and in particular the pressure side of the feed pump ( 43 ) directly in terms of flow with one not via the liquid distributor ( 70 ) liquid-supply line system ( 60 ) connect to. A system according to claim 6, wherein the non-liquid distributor ( 70 ) liquid-supply line system ( 60 ) a nozzle arrangement ( 20 . 22 ) is assigned to the on-demand spraying of the valve arrangement (V4, V5) directly to the line system ( 60 ) supplied liquid. System according to one of claims 1 to 7, wherein the liquid distributor ( 70 ) a distributor housing ( 90 ) and one in the distributor housing ( 90 ) recorded shift cylinder ( 91 ), wherein the liquid inlet ( 71 ) and the liquid outlets of the liquid distributor ( 70 ) in the distributor housing ( 90 ), and wherein the shift cylinder ( 91 ) relative to the liquid inlet ( 71 ) and the liquid outlets ( 72 - 78 ) and in particular rotatable in the distributor housing ( 90 ) is mounted, that depends on the relative position or position of the shift cylinder ( 91 ) to the liquid inlet ( 71 ) and the liquid outlets ( 72 - 78 ) via the switching cylinder ( 91 ) a fluid connection between the liquid inlet ( 71 ) and the individual liquid outlets ( 72 - 78 ) is selectively produced. A system according to claim 8, wherein the distributor housing ( 90 ) a first housing area ( 90-1 ), in which the liquid inlet ( 71 ) and an opposing second housing area ( 90-2 ), in which the individual liquid outlets ( 72 - 78 ), wherein the shift cylinder ( 91 ) relative to the distributor housing ( 90 ) in the axial direction of the distributor housing ( 90 ) is movable. A system according to claim 9, wherein the shift cylinder ( 91 ) in the distributor housing ( 90 ) is stored, that this by the pressure of a liquid inlet ( 71 ) in the first housing area ( 90-1 ) fed liquid from a basic position in the direction of the second housing portion ( 90-2 ) is movable to a switching position, wherein in the distributor housing ( 90 ) Further, a return mechanism, in particular in the form of a return spring ( 92 ), is provided for resetting the shift cylinder ( 91 ) in its basic position when the pressure in the first housing area ( 90-1 ) is below a predetermined or definable value. System according to claim 10, wherein the shift cylinder ( 91 ) is adapted to rotate about its longitudinal axis as it travels from the home position to the shift position and backward at a predetermined angular amount. System according to claim 11, wherein, depending on the rotational position of the shift cylinder ( 91 ) relative to the distributor housing ( 90 ) and in particular relative to the second housing region ( 90-2 ) of the distributor housing ( 90 ) a fluid connection between the liquid inlet ( 71 ) and one of the at least two liquid outlets ( 71 - 78 ) of the liquid distributor ( 70 ) can be produced. System according to one of claims 10 to 12, wherein the shift cylinder ( 91 ) is formed, in its switching position, a fluid connection between the liquid inlet ( 71 ) and one of the liquid outlets ( 71 - 78 ) produce. System according to one of claims 9 to 13, wherein the shift cylinder ( 91 ) a the first housing area ( 90-1 ) facing first area and an opposite and the second housing area ( 90-2 ) facing the second region, wherein the first region of the shift cylinder ( 91 ) with the first housing area ( 90-1 ) cooperating first tooth mechanism and the second portion of the shift cylinder ( 91 ) with the second housing area ( 90-2 ) is associated with cooperating second tooth mechanism. A system according to claim 14, wherein the shift cylinder ( 91 ) is designed sleeve-shaped at least partially in its first and / or second region, wherein in the sleeve-shaped region a sprocket ( 93 . 94 ) is trained. The system of claim 15, wherein in the first and / or second housing area ( 90-1 . 90-2 ) complementary to the sprocket ( 93 . 94 ) trained spikes are provided. System according to one of claims 14 to 16, wherein the first and / or second tooth mechanism is / are designed such that the shift cylinder ( 91 ) only in one direction relative to the distributor housing ( 90 ) is rotatable. A system according to any one of claims 1 to 17, further comprising sensor means for detecting the liquid outlet communicating with the liquid inlet (10). 71 ) of the liquid distributor ( 70 ) is in fluid communication. System according to claim 18 in combination with one of claims 9 to 17, wherein the sensor device is designed to control the rotational position of the shift cylinder (10). 91 ) relative to the distributor housing ( 90 ) and in particular relative to the second housing region ( 90-2 ) of the distributor housing ( 90 ) capture. A system according to claim 19, wherein the sensor means at least one of the liquid distributor ( 70 ) has associated REED sensor. Cleaning system for automatic interior cleaning of dishwashers, in particular commercial dishwashers ( 2 ), which are embodied as program machines or conveyor dishwashers, wherein the cleaning system has a first cleaning nozzle arrangement (R9, R10) with a first line system (R9, R10) associated with the first cleaning nozzle arrangement ( 82 and at least one further, second cleaning nozzle arrangement (R1, R8, R2, R3, R4, R5, R6, R7) having one of the at least one further, second cleaning nozzle arrangement (R1, R8, R2, R3, R4, R5, R6, R7 ) associated second conduit system ( 83 - 86 ), and wherein the cleaning system further comprises a system for selectively supplying liquid, in particular fresh water to the first cleaning nozzle assembly and the at least one further, second cleaning nozzle assembly, wherein the system for selective supply of liquid corresponds to a system according to claims 1 to 20. Dishwasher ( 2 ), in particular commercial conveyor dishwasher, with a fresh water rinsing system for fresh water rinsing of items to be washed and a cleaning system for the required internal cleaning of the dishwasher, wherein the fresh water rinsing system a rinse nozzle arrangement ( 20 . 22 ) and a rinse nozzle assembly ( 20 . 22 ) associated rinse line system ( 60 ), wherein the cleaning system has a first cleaning nozzle arrangement (R9, R10) with a first line system (R9, R10) associated with the first cleaning nozzle arrangement ( 82 and at least one further, second cleaning nozzle arrangement (R1, R8, R2, R3, R4, R5, R6, R7) having at least one of the at least one further, second cleaning nozzle arrangement (R1, R8; R2, R3; R4, R5; R7) associated second conduit system ( 83 - 86 ), and wherein the dishwasher ( 2 Further comprising a system according to any one of claims 1 to 20, to selectively and selectively fresh water of the first cleaning nozzle assembly (R9, R10) or the at least one further, second cleaning nozzle assembly (R1, R8; R2, R3; R4, R5; R6, R7 ).  Dishwasher according to claim 21, wherein the first cleaning nozzle arrangement (R9, R10) and / or the at least one further, second cleaning nozzle arrangement (R1, R8; R2, R3; R4, R5; R6, R7) has at least one rotary nozzle arranged inside the dishwasher ,

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