Dirt-discharge system for a transport dishwasher, and transport dishwasher comprising such a dirt-discharge system

Abstract

The invention relates to a dirt-discharge system for a transport dishwasher for receiving instruments or goods to be cleaned, which can be guided through the transport dishwasher, and to a transport dishwasher comprising such a dirt-discharge system. The dirt-discharge system comprises a collecting tray, a dewatering tray, and a sieve cassette and is located below the transport plane of the transport dishwasher. The collecting tray and the dewatering tray are inclined by a specified angle so as to slope downwards opposite the transport direction of the transport dishwasher such that a liquid is discharged in the direction opposite the transport direction.

Description

[0001] Winterhalter Product & Technology GmbH

[0002] Dirt discharge system for a conveyor dishwasher and conveyor dishwasher with such a dirt discharge system

[0003] Description

[0004] The present invention relates to a dirt discharge system for a conveyor dishwasher for receiving equipment or items to be cleaned, which can be guided through the conveyor dishwasher, as well as to a conveyor dishwasher with such a dirt discharge system

[0005] Such conveyor dishwashers comprise conveyor belts or similar transport devices by means of which items to be cleaned are transported through the conveyor dishwasher in a transport plane, wherein the items to be cleaned are sprayed or exposed to one or more cleaning agents and / or water by means of spray nozzles and are thereby cleaned.

[0006] By applying cleaning agent and / or water to the washware through the spray nozzles, contaminants are removed from the surface of the washware and introduced into the cleaning process. Sieves and filtration devices separate these contaminants from the process water, or the contaminants are removed by the process water as it leaves the system.

[0007] Such transport dishwashers are known, for example, from DE 10 2017 110 046 Ai or from EP 2485 631 Bi.

[0008] From KR 10 2279573 Bi a dishwasher is also known which comprises a filter plate which enables dirt to be removed.

[0009] Further conveyor dishwashers, which represent a general background of the prior art, are known from US 2015 / 0320287 Ai and FR 2 760 624 Ai. It is an object of the present invention to improve such devices and conveyor dishwashers.

[0010] This object is achieved by a dirt discharge system according to claim i and a transport dishwasher with such a dirt discharge system according to claim 20.

[0011] Claims 2 to 19 relate to particularly preferred embodiments of the dirt discharge system according to claim 1, and claims 21 to 23 relate to particularly preferred embodiments of the conveyor dishwasher according to claim 20.

[0012] According to the invention, a dirt removal system for a conveyor dishwasher is provided, wherein the conveyor dishwasher is equipped with spray nozzles for dispensing cleaning fluid. The dirt removal system according to the invention comprises a collecting plate and an adjoining drainage plate, as well as a sieve cassette adjoining the drainage plate.

[0013] The drainage plate can be directly connected to the collecting plate, but it is also possible to provide a gap between the drainage plate and the collecting plate. This gap can be bridged by a bridging element or a connecting element, or the two elements can be connected by such an element. It is also possible for the drainage plate and the collecting plate to overlap at least partially.

[0014] The screen cassette can also be directly connected to the drainage plate, but it is also possible for a gap to be provided between the screen cassette and the drainage plate. This gap can also be bridged by a bridging element or a connecting element, or the two elements can be connected by such an element. In this case, too, it is possible for the screen cassette and drainage plate to overlap at least partially.

[0015] The individual elements of the dirt removal system, in particular the collecting plate, the drainage plate and / or the sieve cassette, can be made of different materials, in particular plastic materials or metals or combinations of these materials.

[0016] The dirt removal system is designed such that when used in a conveyor dishwasher, it is arranged below a transport level of the conveyor dishwasher, with at least the collecting plate being located above at least some of the spray nozzles of the conveyor dishwasher.

[0017] According to the invention, the collecting plate comprises a plurality of recesses arranged so that, when inserted into the conveyor dishwasher, cleaning fluid can be dispensed through the recesses from the spray nozzles. The spray nozzles dispense a cleaning agent or cleaning fluid, which is dispensed through the recesses toward the items to be cleaned, which are conveyed in a transport plane, preferably on a conveyor belt, and in the transport direction through the conveyor dishwasher.

[0018] Both the collecting plate and the drainage plate are arranged at a downward slope, so that any liquid that reaches the collecting plate and / or the drainage plate is drained or can flow away along the inclined plane due to gravity. Both the collecting plate and the drainage plate are inclined downward at a predetermined angle or at a predetermined angle to the horizontal, wherein the predetermined angle is preferably in a range of 2° to 10°, particularly preferably in a range of 2° to 5° relative to the horizontal.

[0019] Both the collecting plate and the drainage plate are designed in such a way that, when used in a conveyor dishwasher, they are inclined in a direction opposite to a transport direction, so that a liquid that reaches the collecting plate and / or the drainage plate is drained away due to gravity opposite to the transport direction of the conveyor dishwasher.

[0020] According to the invention, the drainage plate comprises one or more perforated areas with perforations, and the sieve cassette further comprises side walls and a base with perforations.

[0021] The dirt removal system according to the invention has the advantage that dirt, and in particular dirt particles, are separated from the process water stream at a very early stage, thus minimizing contact time with the rinsing solution. This, in turn, has the further advantage that the dirt particles are not decomposed by the process solution, or at least to a significantly lesser extent, so that they can be removed as larger agglomerates if possible. This also prevents an excessive amount of cleaning agent from being consumed by these discharged particles, since the particles can be discharged early as larger agglomerates.Thus, the dirt removal system according to the invention differs fundamentally from systems according to the prior art, in which a screening system or filtration devices are provided only in a tank device or for covering a tank device or alternatively in external supply or discharge lines for process water.

[0022] The dirt removal system of the present invention therefore ensures that the dirt particles are removed from the rinsing process as quickly as possible and by means of a limited volume flow of process water and collected in a sieve cassette. This reduces or minimizes the swelling process of the dirt particles, which reduces their mechanical strength and therefore leads to premature disintegration of the dirt particles into smaller components.

[0023] The transport of dirt particles from the collection plate through the drainage plate to the screen cassette occurs automatically by process water, which reaches the collection plate and the drainage plate and, due to gravity and the inclination of the plates, carries the dirt particles into the screen cassette. This automatic, or passive, transport is further supported by the fact that when a drop of process water impacts the collection plate or the drainage plate, an impulse is transmitted to the screen surface, which in turn exerts an impulse on the dirt particles on the collection plate or the drainage plate, so that they are also moved towards the screen cassette due to the downhill force.Since the screen cassette is located at a lower geodetic level than the drainage plate, and furthermore the drainage plate is located at a lower geodetic level than the collection plate, the dirt particles are automatically transported into the screen cassette without the need for any additional active agents.

[0024] Overall, this increases the effectiveness of the cleaning process, the cleaning process is less disrupted by contaminants and dirt particles still in the system, and the consumption of cleaning agents is reduced, thus enabling more efficient and effective cleaning and early and effective separation of dirt particles.

[0025] In a preferred embodiment, the collecting plate and the dewatering plate partially overlap in the transport direction. Furthermore, it is optionally preferred that the dewatering plate and the screen cassette also partially overlap in the transport direction. This enables an effective transfer and transport of dirt particles from the collecting plate to the dewatering plate and finally into the screen cassette, which enables smooth and effective removal of the dirt particles.

[0026] In a particularly preferred embodiment, the filter cassette can be detachably and / or removably attached to the drainage plate and / or to guides, brackets, or other elements of the conveyor dishwasher. This has the advantage that the filter cassette can be removed and removed from the dishwasher independently of the other elements of the dirt removal system, in particular independently of the collection plate and the drainage plate, if necessary even while the dishwasher is in operation. This allows the dirt particles collected in the filter cassette to be disposed of, and the filter cassette can be emptied and reinserted into the system. Operation of the dishwasher does not need to be interrupted.

[0027] In a preferred embodiment, the sieve cassette or a receptacle or holder for the sieve cassette is designed with a stop, which requires a user or operator to first lift the sieve cassette to remove it and, upon reinsertion, to position the sieve cassette above or behind the stop. This automatically provides the user with haptic feedback, particularly upon reinsertion and correct insertion of the sieve cassette, informing them that the sieve cassette is correctly inserted and ready for use.

[0028] In a particularly preferred embodiment, the recesses in the collecting plate are circular or substantially circular, or oval or elliptical, or approximately these shapes. In another embodiment, the recesses can also be rectangular or substantially rectangular, in particular square. With such a shape, the recesses can be particularly well adapted to the spray cone of the spray nozzles, ensuring in particular that all of the cleaning fluid emitted by the spray nozzles also reaches the items to be cleaned, thus ensuring effective removal of dirt particles from the items to be cleaned.At the same time, this makes it possible to ensure that the collecting plate has the largest possible surface area, so that the dirt particles that are released from the washware can be caught as early, completely and effectively as possible directly after they have been released from the washware and can then be removed. The recesses preferably have a diameter in a range of approximately 30 mm to 40 mm, particularly preferably in a range of approximately 32 mm to approximately 36 mm. In the event that the recesses do not have a circular or substantially circular cross-section, recesses are provided which have a similar cross-sectional area to that achieved with the above-mentioned diameters. Preferred cross-sectional areas have a size in a range of 2000 mm. 2 up to 5500 mm 2 , particularly preferably a range of 3000 mm 2 up to 4000 mm 2 .

[0029] Particularly preferably, the recesses in the collecting plate are tapered, so that the recesses on an upper side of the collecting plate have a larger opening or area than the recesses on an underside of the collecting plate. This allows the recesses to be adapted even more precisely to the spray cone of the spray nozzles, thus further enhancing the advantages described above. In another embodiment, the recesses can also be cylindrical or substantially cylindrical.

[0030] In a further preferred embodiment, elevations or projections extending from the surface of the collecting plate are provided on the upper side of the collecting plate and around the recesses, preferably around all recesses or alternatively around some of the recesses. Such elevations or projections can prevent overflowing suds and / or dirt particles released from the washware from falling through the recesses onto the spray nozzles or in their vicinity, potentially disrupting the spray pattern. This prevents contamination of the spray nozzles and also ensures that as many dirt particles as possible can be captured by the collecting plate and subsequently discharged into the filter cassette via the drainage plate.

[0031] In a further preferred embodiment, the collecting plate comprises a rear wall at its end facing away from the dewatering plate and / or side walls on each of its two sides, wherein this rear wall preferably extends over the entire width of the end facing away from the dewatering plate or the side walls preferably extend over the entire length of the sides of the collecting plate. This ensures that dirt particles collected by the collecting plate cannot fall off the collecting plate, but are reliably passed on towards the dewatering plate, assisted by the liquid falling onto the collecting plate, and are then finally guided into the screen cassette. In a further preferred embodiment, the dewatering plate is wider than the collecting plate in a direction perpendicular to the transport direction.This ensures, in a particularly simple manner, that dirt particles carried by the process water from the collection plate to the drainage plate, or due to the slope and the impulsive effect of the process water droplets falling onto the collection plate, reach the drainage plate completely and do not fall to the side of the drainage plate. This largely prevents the dirt or dirt particles from remaining in an area for extended periods where the spray nozzles would directly or indirectly spray process water onto the dirt or dirt particles, which would then further reduce and / or decompose them, leading to the disadvantages described above.

[0032] In a further preferred embodiment, the dewatering plate has a raised portion at its end facing the screen cassette, extending across the entire width of the dewatering plate in a direction perpendicular to the transport direction. This creates a kind of "dam," so that the particles and process water are dammed up to a certain extent at the deeper end of the dewatering plate. This has a positive effect on the dewatering of the dirt or contaminant particles.

[0033] This elevation is preferably configured in a cross-sectional direction perpendicular to the plane of the drainage plate and in the transport direction such that it has a curved, arcuate, or circular surface or a corresponding curved, arcuate, or circular partial cross-section. This reduces, in particular, the flow velocity of the water in the area of ​​this elevation, which also has a positive effect on the drainage of the contaminant particles on the drainage plate. Ultimately, this supports the drainage process so that as little process water as possible is required in the circuit and process water can be recycled as quickly as possible for further use.

[0034] In a further preferred embodiment, the drainage plate comprises a rear wall or a transfer web at its end facing the collecting plate, so that the transport of the contaminant particles from the collecting plate to the drainage plate proceeds as smoothly as possible, in particular so that all contaminant particles that have accumulated on the collecting plate are also reliably transported to the drainage plate. Furthermore, the drainage plate preferably comprises side walls on both sides, which preferably extend over the entire length of the sides of the collecting plate. This ensures that the contaminant particles can be reliably guided along the drainage plate and ultimately into the screen cassette without falling off the sides of the drainage plate.

[0035] In a preferred embodiment, the collecting plate and the dewatering plate are inclined at the same predetermined angle, so that a uniform flow velocity or a uniform transport velocity of the contaminant particles is supported, also caused by the impulses exerted on the plates by falling process water drops, as described above.

[0036] In a preferred embodiment, the drainage sheet comprises perforated areas and non-perforated areas. The perforated areas preferably have the shape of elongated rectangles, with the longer side edges preferably having a length of approximately 120-160 mm, particularly preferably a length of approximately 130-150 mm, while the shorter side edges preferably have a length of approximately 10-50 millimeters, particularly preferably 20-40 mm. The perforated areas are preferably arranged parallel to one another and aligned in the transport direction or in the machine direction. The non-perforated areas are preferably narrower in a direction transverse to the transport direction than the perforated areas. This design ensures particularly effective transport of dirt particles and, at the same time, effective drainage.

[0037] In a particularly preferred embodiment, the sieve cassette is provided with side walls on all sides, with the side walls extending a predetermined height above the bottom of the sieve cassette. This ensures that the contaminant particles transported into the sieve cassette collect within the sieve cassette and cannot, or can only with great difficulty, escape again.

[0038] The contaminant particles collected in the sieve cassette are further dewatered within the sieve cassette through the perforations in the base. Preferred heights for the side walls of the sieve cassette are in the range of 10 mm to 50 mm, particularly in the range of 20 mm to 50 mm.

[0039] A further, particularly preferred embodiment has perforations, in particular elongated holes, in at least one of the side walls of the sieve cassette. These perforations in the side wall or in several side walls can ensure emergency running properties, so that drainage of the sieve cassette can take place even if the sieve surface in the bottom area of ​​the sieve cassette becomes blocked. The perforations in the bottom area of ​​the sieve cassette have a diameter of preferably 2-5 mm, in particular 2-3 mm, although different shapes of perforations with similar hole cross-sections can of course also be provided. The perforations in the side wall(s) of the sieve cassette are preferably designed as elongated holes. In a preferred embodiment, the elongated holes are 10 mm to 15 mm long, for example 12 mm long, and they have a width of 2 mm to 5 mm, for example 3 mm.

[0040] In a particular embodiment, the dirt removal system is designed such that the collecting plate can be moved from an operating position to a maintenance position. Preferably, the collecting plate comprises a hinge or is connected to other components of the dirt removal system via a hinge, whereby the collecting plate can be rotated or tilted from the operating position to the maintenance position and vice versa relative to other components of the dirt removal system. The dirt removal system is designed such that, in the rotated or tilted maintenance position, the spray nozzles and / or the rinsing arms of the dishwasher are easily accessible to the user.

[0041] The invention further relates to a conveyor dishwasher with a dirt removal system as described above.

[0042] Such a conveyor dishwasher preferably comprises a loading zone and a first wash zone, for example, a pre-wash zone, in which spray nozzles are arranged. The conveyor dishwasher and the soil removal system are designed and arranged such that the collecting plate is located within the first wash zone or the pre-wash zone, and the filter cassette is located outside the first wash zone or the pre-wash zone, preferably in an inlet zone of the conveyor dishwasher and / or the loading zone. If the conveyor dishwasher comprises only one wash zone and no pre-wash zone, the filter cassette is preferably arranged outside this wash zone.

[0043] Due to the special position of the sieve cassette outside the first wash zone or the pre-wash zone or outside a wash zone, the dirt or the dirt particles collected in the sieve cassette are not hit and broken up by the incoming wash solution or by the incoming process water in the wash zone or the first wash zone or the pre-wash zone. This means that the process water is not contaminated as quickly, and the cleaning performance in the wash zone is improved. A preferred embodiment of a conveyor dishwasher has a cleaning zone in which spray nozzles are arranged, wherein the conveyor dishwasher and the dirt removal system are designed and arranged such that the collecting plate is located within the cleaning zone and the sieve cassette is located outside the cleaning zone, preferably in an inlet zone of the conveyor dishwasher.Even with such an embodiment, the advantages described above are achieved in a particularly effective manner.

[0044] In a particularly preferred embodiment, the conveyor dishwasher according to the invention also comprises a tank that is separated from a wash chamber or from the remaining wash chamber of the conveyor dishwasher by a tank cover sieve. This ensures that even dirt particles that are not captured and removed by the dirt removal system according to the invention do not enter the tank and the subsequent wash process.

[0045] This in particular creates a redundant system, which is particularly important in cases where the dirt removal system is designed in such a way that the filter cassette is removable and, in particular, is designed in such a way that the filter cassette can also be removed during operation of the dishwasher in order to dispose of the collected dirt or dirt particles.

[0046] The invention and its features and advantages will become even clearer with reference to the following figures, which illustrate particular embodiments:

[0047] Fig. i shows schematically a side view or a partial cross section of an embodiment of a conveyor dishwasher according to the invention with an embodiment of a dirt discharge system according to the invention,

[0048] Fig. 2 shows schematically a plan view of an embodiment of a dirt discharge system according to the invention with parts of a conveyor dishwasher according to the invention,

[0049] Fig. 3 shows schematically a perspective view of an embodiment of a dirt discharge system according to the invention with parts of a conveyor dishwasher according to the invention,

[0050] Fig. 4 shows schematically a side view or a partial cross-section of another embodiment of a dirt discharge system according to the invention with parts of a conveyor dishwasher according to the invention, wherein the collecting plate is in an operating position, and

[0051] Fig. 5 shows schematically a side view or a partial cross section of the embodiment shown in Fig. 4, wherein the collecting plate is in a maintenance position.

[0052] Fig. 1 schematically shows parts of a conveyor dishwasher 10 according to the invention, which has a washing chamber 12 and comprises a tank 700 covered with a flat sieve device, here a tank cover sieve 710. Dishes 60 to be cleaned are guided on a conveyor belt and in a transport plane 50 in the transport direction T through the conveyor dishwasher 10.

[0053] The conveyor dishwasher 10 includes a dirt removal system 100 comprising a collecting plate 200, a drainage plate 400, and a sieve cassette 600 adjoining the drainage plate 400. The transport plane 50 of the conveyor dishwasher is located above the dirt removal system 100, with the transport direction T running from left to right in the schematic representation in Fig. 1.

[0054] The conveyor dishwasher comprises a wash arm device 110, shown only schematically here, which comprises a plurality of wash arms 120, which in turn comprise a plurality of spray nozzles (122, see Fig. 2 and Fig. 3). As can be clearly seen in Fig. 1, the conveyor dishwasher 10 and the dirt removal system 100 are designed such that the collecting plate 200 is located above the wash arm device 110 and thus above some of the spray nozzles 122 (see Fig. 2 and Fig. 3), while the dirt removal system 100 is located entirely below the transport plane 50.

[0055] Details and details of the embodiments of the dirt removal system 100 according to the invention can be seen in particular in Figs. 2 and 3:

[0056] The dirt removal system 100 comprises a collecting plate 200 which is provided with recesses 240 which are arranged such that a cleaning liquid which is dispensed by spray nozzles 122 arranged on rinsing arms 120 can be dispensed through these recesses 240 onto the items 60 to be cleaned.

[0057] The cleaning device 100 shown in this embodiment comprises a total of three elongated spray arms 120 arranged parallel to one another, each elongated spray arm 120 comprising six spray nozzles 122. Of course, in other embodiments, a different number of spray nozzles can be arranged on the elongated spray arms; it is also possible for different elongated spray arms to be provided with a different number of spray nozzles on the respective elongated spray arms.

[0058] In this embodiment, the collecting plate 200 is designed to cover two of the three wash arms 120. The wash arms shown are lower wash arms; the upper wash arms of the dishwasher, which are arranged above the transport plane, are not shown here. The collecting plate 200 therefore has a total of twelve recesses 240, which are circular in this embodiment.

[0059] As can be clearly seen in particular in Fig. 3, two adjacent recesses 240 are each surrounded by an elongated elevation 242, which provides protection for the spray nozzles 122 of the flushing arms 120. This nozzle protection prevents, in particular, liquid flowing along the collecting plate 200 from flowing downward through the recesses 240 and possibly onto the nozzles 122.

[0060] In the embodiment shown in Fig. 2, the collecting plate 200 comprises parallel, elongated, perforated areas 260, each perforated area 260 being arranged between two elevations 242. These perforated areas 260 allow for initial dewatering of the contaminant particles collected on the collecting plate, so that a portion of the process fluid can be returned to the circulation system at a very early stage.

[0061] Fig. 3 shows a perspective view of an embodiment of a dirt removal system according to the invention. In the embodiment shown in Fig. 3, the collecting plate 200 also comprises perforated areas, as shown in the embodiment shown in Fig. 2. In another embodiment not shown separately, however, it is also possible for the collecting plate to have no perforated areas. In such a modified embodiment, it is particularly ensured that even small pieces of dirt particles collected by the collecting plate are not released into the wider area of ​​the wash cabinet through perforations.

[0062] Adjacent to the collecting plate 200, in the direction opposite to the transport direction T, is a dewatering plate 400 having a plurality of perforated regions 460 separated from one another by non-perforated regions 470. Both the perforated regions 460 and the non-perforated regions 470 are formed in the shape of elongated rectangles. As can be seen in particular in Fig. 2 and Fig. 3, a transfer web 300 is provided between the collecting plate 200 and the dewatering plate 400, which extends across the entire width of the collecting plate 200. In this embodiment, the transfer web 300 is formed integrally with the collecting plate 200; in another embodiment, however, it is also possible for the transfer web 300 to be arranged as an independent element between the collecting plate 200 and the dewatering plate 400.

[0063] The drainage plate 400 is provided with side walls 422 that extend over the entire length of the drainage plate 400. Furthermore, the drainage plate 400 includes a raised portion 480 at its end facing the screen cassette. This raised portion 480, which serves as a weir, extends across the entire width of the drainage plate 400.

[0064] The drainage plate 400 and the screen cassette 600 partially overlap in the transport direction T, as is particularly clearly visible in Fig. 2.

[0065] The sieve cassette 600 comprises circumferential side walls 620 and a sieve bottom 610, the surface of which is essentially completely formed with perforations for drainage.

[0066] As can be seen particularly in Fig. 1, the sieve cassette 600 is located completely outside the cleaning zone R.

[0067] As can be clearly seen in Fig. 3, one of the side walls 620 comprises elongated holes 626 through which drainage is also possible, wherein these elongated holes 626 in particular ensure an emergency running property should the perforations in the sieve bottom 610 of the sieve cassette 600 become clogged.

[0068] Fig. 4 and Fig. 5 schematically show a side view and a partial cross-section, respectively, of another embodiment of a dirt discharge system according to the invention with parts of a conveyor dishwasher according to the invention. Similar or identical components are provided with the same reference numerals, and to avoid repetition, reference is made to the description of the embodiments shown in Figs. 1 to 3.

[0069] This embodiment of the dirt removal system also comprises a collecting plate 200, a drainage plate 400 and a sieve cassette 600. The associated conveyor dishwasher in this embodiment comprises five parallel arranged (lower) rinse arms 120. The collecting plate 200 is designed such that it is arranged substantially above two of the total of five rinse arms 120, while the remaining three rinse arms 120 are substantially not covered by the collecting plate 200.

[0070] As is also clearly visible in Fig. 4 and Fig. 5, the dewatering plate 400 comprises, on its upper side and at its end facing the screen cassette 600, a raised portion 480 which extends across the entire width of the dewatering plate 400 in a direction perpendicular to the transport direction. This raised portion 480 serves as a weir and ensures a regulated and controlled overflow of the liquid from the dewatering plate onto the screen cassette, as described above. In this embodiment, the raised portion 480 has a curved surface, initially rising and then falling in a descending direction of inclination, from right to left in Fig. 4.

[0071] Furthermore, in this embodiment, the collecting plate 200 is designed such that it can be moved relative to other components of the dirt removal system from an operating position, as shown in Fig. 4, into a maintenance position, as shown in Fig. 5. For this purpose, the dirt removal system comprises a hinge device 270 about which the collecting plate can be rotated or tilted upward, as shown in Fig. 4 by the arrow K.

[0072] If the collecting plate 200 is in its upwardly rotated or tilted maintenance position, as shown in Fig. 5, the flushing arms 120, which are otherwise covered in the operating position, are also very easily accessible to a user in order to carry out maintenance work, cleaning or replacing parts, for example replacing individual spray nozzles.

[0073] The features presented in the description and in the figures may be essential for the realization of the invention both individually and in any combination.

Claims

Claims for dirt removal system (too) for a transport dishwasher (10) with Spray nozzles (122) for dispensing cleaning fluid, wherein the dirt discharge system (100) comprises a collecting plate (200), a draining plate (400) and a sieve cassette (600), wherein the dirt discharge system (100) is configured such that, when used in the conveyor dishwasher (10), the dirt discharge system (100) is located below a transport level (50) of the conveyor dishwasher (10) for the items to be cleaned, and that at least the collecting plate (200) is located above at least some of the spray nozzles (122), wherein the collecting plate (200) comprises several recesses (240) arranged such that cleaning fluid can be dispensed from the spray nozzles (122) through these recesses (240), wherein both the collecting plate (200) and the draining plate (400) are oriented in a direction opposite to a transport direction (T) of the conveyor dishwasher (10) are each inclined downwards by a predetermined angle,such that a liquid which comes into contact with the collecting plate (200) and / or the draining plate (400) is discharged by gravity in a direction opposite to the transport direction (T), wherein the draining plate (400) has one or more perforated areas (460) with perforations, and wherein the sieve cassette (600) has side walls (620) and a bottom (610) with perforations. Dirt discharge system (100) according to claim 1, characterized in that the, Collecting plate (200) and drainage plate (400) partially overlap in the transport direction (T) and / or that the drainage plate (400) and the sieve cassette (600) partially overlap in the transport direction (T). Dirt discharge system according to claim i or 2, characterized in that the The sieve cassette (600) can be detachably and / or removablely attached to the drain plate (400) and / or to guides of the transport dishwasher. A dirt discharge system according to one of the preceding claims, characterized in that the recesses (240) in the collecting plate (200) are circular or substantially circular, or oval, elliptical, or rectangular. A discharge system according to one of the preceding claims, characterized in that the recesses (240) in the collecting plate (200) are conically tapered, such that the recesses (240) on a top side of the collecting plate (200) have a larger area than the recesses (240) on a bottom side of the collecting plate (200), or are cylindrical.A dirt discharge system according to any one of the preceding claims, characterized in that elevations or projections (242) are provided on the upper side of the collecting plate (200) and around the recesses (240), extending over the surface of the collecting plate (200). A dirt discharge system according to any one of the preceding claims, characterized in that the collecting plate (200) comprises a rear wall at its end facing away from the draining plate (400) and / or side walls on both sides, preferably extending over the entire width of the end facing away from the draining plate (400) or preferably over the entire length of the sides of the collecting plate (200). A dirt discharge system according to any one of the preceding claims, characterized in that the draining plate (400) is wider than the collecting plate (200) in a direction perpendicular to the direction of transport.Dirt discharge system according to one of the preceding claims, characterized in that the drainage plate (400) has a projection (480) on its upper side and at its end facing the screen cassette (600), which extends over the entire width of the drainage plate (400) in a direction perpendicular to the transport direction. Dirt discharge system according to claim 9, characterized in that the projection. (480) in a cross-sectional direction perpendicular to the plane of the drainage plate (400) and has a curved, arcuate, or circular surface in the transport direction. Dirt discharge system according to one of the preceding claims, characterized in that the drain plate (400) comprises a rear wall and / or a transfer bridge (300) at its end facing the collecting plate (200) and / or side walls (422) on both of its sides, which preferably extend over the entire length of the sides of the collecting plate (200). Dirt discharge system according to one of the preceding claims, characterized in that the collecting plate (200) and the drain plate (400) are inclined at the same predetermined angle. Dirt discharge system according to one of the preceding claims, characterized in that the drain plate (400) comprises perforated areas (460) and unperforated areas (470). Dirt discharge system according to claim 13, characterized in that the perforated The areas (460) and the unperforated areas (470) are rectangular or substantially rectangular, preferably with side edges that are longer in a direction parallel to the transport direction (T) than in a direction transverse to the transport direction (T), and are arranged alternately in a direction transverse to the transport direction (T). A dirt discharge system according to claim 13 or 14, characterized in that the unperforated areas (470) are narrower in a direction transverse to the transport direction (T) than the perforated areas (460). A dirt discharge system according to any one of the preceding claims, characterized in that the screen cassette (600) comprises side walls (620) on all sides, which extend a predetermined height above the base (610). A dirt discharge system according to any one of the preceding claims, characterized in that at least one of the side walls (620) of the screen cassette (600) has perforations (626), preferably elongated holes.Dirt discharge system according to one of the preceding claims, characterized in that the bottom of the sieve cassette (600) has perforations whose size preferably corresponds to the size of the perforations in the perforated area (470) of the drainage plate (400). -) Dirt discharge system according to one of the preceding claims, characterized in that the dirt discharge system is designed such that the collecting plate (200) can be moved from an operating position to a maintenance position, wherein the collecting plate (200) preferably comprises a hinge about which the collecting plate (200) can be rotated or tilted from the operating position to the maintenance position. .) Conveyor dishwasher (10) with a dirt discharge system (100) according to one of the preceding claims.) Transport dishwasher (10) according to claim 20 with a loading zone and a first washing zone, preferably a pre-wash zone, in which spray nozzles (122) are arranged, wherein the transport dishwasher and the dirt discharge system (100) are designed and arranged such that the collecting plate (200) is located within the first washing zone and the sieve cassette (600) is located outside the first washing zone and preferably in an inlet zone of the transport dishwasher and / or in the loading zone. .) Conveyor dishwasher (10) according to claim 20 with a cleaning zone (R) in which spray nozzles (122) are arranged, wherein the conveyor dishwasher (10) and the dirt discharge system are designed and arranged such that the collecting plate (200) is located within the cleaning zone (R) and the filter cassette (600) is located outside the cleaning zone (R) and preferably in an inlet zone of the conveyor dishwasher (10).) Transport dishwasher according to one of claims 20 to 22, characterized in that it comprises a tank (700) which is covered with a tank cover screen (710) opposite a washing chamber (12) of the transport dishwasher (10).

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