EP1835840B1 - Lave-vaisselle à plusieurs cuves, équipé d'un dispositif de lavage à contre-courant - Google Patents

Lave-vaisselle à plusieurs cuves, équipé d'un dispositif de lavage à contre-courant Download PDF

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Publication number
EP1835840B1
EP1835840B1 EP06706474A EP06706474A EP1835840B1 EP 1835840 B1 EP1835840 B1 EP 1835840B1 EP 06706474 A EP06706474 A EP 06706474A EP 06706474 A EP06706474 A EP 06706474A EP 1835840 B1 EP1835840 B1 EP 1835840B1
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EP
European Patent Office
Prior art keywords
backwash
washing water
tank
filter
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06706474A
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German (de)
English (en)
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EP1835840A1 (fr
Inventor
Bruno Gaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meiko Maschinenbau GmbH and Co KG
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Meiko Maschinenbau GmbH and Co KG
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Publication of EP1835840A1 publication Critical patent/EP1835840A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation

Definitions

  • the invention relates to a multi-tank dishwasher having at least one rinsing zone for loading items to be washed with rinse water in a rinsing chamber and at least one rinse water storage tank, at least one filter housing and a backwash device. Furthermore, the invention relates to a method for operating a multi-tank dishwasher, the method has a normal operation and a backwash operation.
  • multi-tank dishwashers For cleaning items to be washed in single-compartment automatic dishwashers and multi-tank dishwashers are now used in the commercial sector, in which the items to be cleaned is transported by a conveyor through the various zones of the dishwasher.
  • Such multi-tank dishwashing machines generally comprise at least one rinsing zone, at least one final rinse zone and optionally a drying zone. In doing so, the items to be cleaned pass successively through the said treatment zones.
  • multi-tank dishwashers may be formed, for example, as a belt transport or basket transport machines. Both versions have in common that the items to be washed are transported by the means of transport, for example continuously, through the individual treatment zones.
  • the rinsing water tanks of the rinsing zone are filled with fresh water and heated in the multi-tank dishwasher. Furthermore, detergent is added to the rinse water.
  • a plurality of rinsing zones can be arranged one behind the other, whose rinsing water, for example, have different temperatures with different cleaning agents and / or with different cleaning agent concentrations.
  • a rinsing zone is usually designed as a chamber and typically has an inlet opening and an outlet opening. Through these openings, the items to be washed are transported through the respective rinsing zone by means of the conveyor.
  • a rinsing zone has a rinsing water tank and a circulating pump, which sucks rinsing water from the rinsing water tank and sprayed onto the items to be washed via a spray system assigned to the rinsing zone. In this case, the dirt adhering to the items to be washed is removed.
  • the rinse water flows back together with the rinsed dirt back into the rinse water tank.
  • the rinsed dirt is filtered out of the rinse water through a sieve system.
  • screen plates with hole diameters of 2 mm to 4 mm are used, which cover the entire rinsing water tank. Dirt particles, which are smaller than the hole diameter, are circulated together with the rinsing water.
  • the multi-tank dishwasher in one or more rinsing zones detergent and dirt residues, which are loosely on the items to be washed, rinsed by means of hot fresh water.
  • the hot fresh water can additionally be accompanied by a rinse aid.
  • the fresh water or rinse water is then usually wholly or partially fed to a rinse water tank a rinsing zone to dilute the there located in Spülwassertank debris.
  • the items to be washed optionally pass through one or more drying zones in which the items to be washed are dried.
  • the above-mentioned screen plates in the at least one rinsing zone often have the disadvantage that the dirt filtered out of the rinsing water remains on them and is not actively removed from the rinsing zone.
  • By dropping the rinse water of this dirt can be further crushed and then passes with a time delay also in the rinse water of the rinse zone, where it increases the dirt content of the rinse water.
  • This is particularly disadvantageous because the respective cleaning performance of a rinsing zone typically decreases with the amount of dirt in the rinse water.
  • the dirt content of the rinsing water of the rinsing zone can be counteracted by increasing the proportion of rinse water supplied to the rinsing zone from the final rinse zone.
  • a disadvantage, however, is that in this method, the consumption of cleaning agents, which must be added to the rinse water increases in the same proportion. This increases operating costs and environmental impact.
  • Such a device is in DE 24 51 822 C2 described.
  • the device described in this document discloses a collecting pot for a dishwasher with a first suction chamber connected to a drain pump and a second suction chamber connected to a circulation pump.
  • the first and second suction chambers are connected to each other by a fine filter screen.
  • rinsing liquid is sucked out of the dishwasher, wherein rinsing liquid is withdrawn from both suction chambers through the rinsing pump.
  • the known from the prior art devices, such as the EP 0 702 928 A1 disclosed typically function in that for a cleaning of the fine screen of the rinsing operation is interrupted.
  • a separate program step of a Feinsiebgraphy is executed with switched off rinse water pump.
  • the fine sieve is constantly flowed through by a rinsing liquid in a filter direction, so that the fine sieve is not directly accessible for cleaning (for example, spraying from the outside).
  • This interruption of the rinsing operation for cleaning the screens used thus means an additional amount of time during which the respective rinsing chamber can not be used.
  • the object of the invention is to provide a dishwasher, in particular a multi-tank dishwasher, which avoids the above-mentioned disadvantages of the prior art.
  • a simple filter system for recirculated rinse water of a rinse zone should be used.
  • An essential feature of the present invention is that a backwash device is used, which reverses a flushing water flow through a fine filter, without the rinsing of the dishwasher must be interrupted.
  • a multi-tank dishwasher which has at least one rinsing zone for loading dishes with rinse water in a rinsing chamber.
  • the rinsing zone has a rinsing water storage tank, at least one filter housing, at least one fine filter embedded in the at least one filter housing and at least one backwashing device.
  • the at least one fine filter subdivides at least one interior of the at least one filter housing into at least one dirty water space and at least one pure water space.
  • the at least one dirty water space can be acted upon by flushing water via at least one flushing water inflow from the flushing chamber.
  • This at least one rinsing water inflow can in particular have at least one coarse sieve.
  • the at least one fine filter has at least one filter wall, for example made of perforated metal sheet or wire mesh.
  • rinse water flows from the at least one dirty water space through the at least one filter wall into the at least one pure water space.
  • This at least one pure water space is connected to the at least one Spülwasservorratstank via at least one drain device, advantageously a drain opening or a drain neck.
  • the at least one backwash device has at least one rinse water return connected to the at least one pure water space.
  • This rinse water return can, for example, connect the at least one rinse water storage tank to the at least one pure water space and has at least one backwash pump.
  • the backwashing device has a wastewater line connected to the at least one wastewater space with at least one wastewater pump.
  • the backwashing device is configured such that in a backwashing operation, a rinse water flow between the at least one pure water space and the at least one dirty water space is reversible by the at least one filter wall. This can be done in particular by the fact that in the backwashing a rinse water pressure ratio between the at least one pure water space and the at least one wastewater space is reversible.
  • the at least one rinse water return can be connected to the at least one drain device, for example.
  • a flow direction of the rinsing water from the at least one pure water space into the at least one rinse water storage tank can define a flow direction during normal operation.
  • the connection between Spippowasser Weglauf and drain device is then configured such that the at least one drain device is acted upon in the backwash by the at least one rinse water return with rinse water having a speed component opposite to this flow direction.
  • the rinse water return has a backwash, which in the drain device, such as the drain pipe, opens, wherein the backflush, for example, at an angle ⁇ 90 ° (advantageously ⁇ 70 ° and preferably ⁇ 60 °) in the at least one drain device empties.
  • the backwash nozzle can also be completely or partially identical to the outlet nozzle so that it is not necessary to use two separate nozzles.
  • the flushing water flow in the at least one drainage device can be reversed by means of the at least one backwash pump, so that overall the flushing water flow is reversed and the at least one fine filter is charged with a flushing water flow in reverse to normal operation.
  • contaminants which have accumulated on the at least one filter wall in the dirty water space detached from the at least one filter wall and can be removed via the at least one sewer line.
  • the backwash pump and the wastewater pump are put into operation simultaneously in the backwash operation in order simultaneously to lower the rinse water pressure in the at least one dirty water space and to increase the rinse water pressure in the at least one pure water space.
  • the at least one sewage pump and the at least one backwash pump can be driven jointly by a single pump motor.
  • the at least one backwash pump as an axial pump is executed, which is integrated in the backwash or the backwash line.
  • Axial pumps have for the application described in particular the advantage that a high volume flow is generated at a comparatively low pressure. This prevents, in particular, that the backwashing in at least one pure water space builds up too high pressure, which could damage the at least one fine filter or squeeze out of the at least one filter housing.
  • the multi-tank dishwasher according to the invention solves the disadvantages of the prior art described above in a highly advantageous manner.
  • the filter effect of the at least one fine filter can be significantly improved by means of the device described.
  • the downtime of the machine and the personnel costs for cleaning the at least one rinse zone are reduced.
  • the backwashing operation can be carried out simultaneously to the rinsing operation, so that the rinsing operation and thus the cleaning of the ware is not influenced by the backwashing of the at least one fine filter.
  • the rinsing operation thus takes place irrespective of whether the at least one fine filter takes place in the reverse direction with rinsing agent flow direction from rinsing water space to pure water space or in backwashing operation with rinsing water flow in normal operation.
  • the multi-tank dishwasher has at least one contamination sensor in the interior of the at least one filter housing.
  • the multi-tank dishwasher has at least one contamination sensor in the interior of the at least one filter housing.
  • the flushing water level and / or the flushing water pressure within the at least one dirty water space typically increases with increasing contamination of the at least one filter wall.
  • the multi-tank dishwasher may have at least one electronic control device for switching between normal operation and backwashing operation, wherein, for example, the at least one electronic control device controls the at least one backwash pump and the at least one wastewater pump. Also, additional valves or the like can be controlled by the at least one electronic control device.
  • the electronic control device may be part of a comprehensive electronic control device of the multi-tank dishwasher.
  • the electronic control device may be connected to the at least one contamination sensor and, as soon as it is detected that a predetermined degree of contamination is exceeded, automatically switched between a normal operation and a backwash operation.
  • the multi-tank dishwasher can advantageously have at least one Tankabdecksieb, wherein rinse water from the washing chamber through the at least one Tankabdecksieb can get into the at least one Spüliganvorratstank.
  • this Tankabdecksieb be part of a Spülwasservorratstankabdeckung.
  • the at least one fine filter can be advantageously equipped as a replaceable filter cartridge with a wastewater pipe.
  • the filter insert is sealed tightly against the filter housing, so that rinse water can only pass through the at least one filter wall from the pure water space in the wastewater space during backwashing, but not in other ways.
  • an optimum pressure difference between dirty water space and pure water space can build up, so that a strong backwashing with optimal cleaning effect by the at least one filter wall occurs.
  • FIG. 1 schematically a multi-chamber dishwasher 110 is shown, wherein FIG. 1 shows a section through a rinsing zone 112 of the multi-chamber dishwasher 110 with a sectional plane perpendicular to a conveying direction of a transport device 114.
  • transport devices 114 are conceivable, for example transport devices 114 for belt transport or for basket transport.
  • the multi-chamber dishwasher 110 is configured in this embodiment as a belt transport machine, in which wash ware 116 is transported on the designed as a conveyor conveyor 114 by the multi-chamber dishwasher 110.
  • the multi-chamber dishwasher 110 has a rinsing chamber 113 with a housing 118, which can be opened laterally by means of an access door 120.
  • a Spülwasservorratstank 122 and a filter housing 124 are embedded in the bottom of the housing 118.
  • a rinse water circulation pump 126 draws rinse water 128 via a circulation piping system 130 from the rinse water storage tank 122 and delivers it via the circulation piping system 130 to rinsing nozzles 132. There, the rinse water 128 is sprayed over the wash ware 116, whereby the ware 116 is cleaned. The rinse water 128 then drips, together with dirt that has been removed from the items to be washed 116, to the bottom of the housing 118.
  • This floor is above the Spülwasservorratstanks 122 a Tankabdecksieb 134, which is mostly interspersed with sieve holes.
  • Sieve holes with approximately 1 mm to 4 mm, preferably 1.5 mm to 2.5 mm, particularly preferably 2.0 mm in diameter, are preferably used here.
  • a part of the rinse water 128 flows through these holes directly to the rinse water storage tank 122 (in FIG. 1 symbolically represented by arrow 136).
  • An (optional) supply of fresh water and / or rinse water from a final rinse zone into the rinse water storage tank 122 is in FIG. 1 not shown.
  • the Tankabdecksieb 134 has a slope in the direction of Grobsiebs 138. This coarse screen 138 is inserted into the filter housing 124. Thus, a second portion of the rinse water 128 (in FIG. 1 symbolically indicated by the arrow 140) via the coarse filter 138 into the filter housing 124.
  • a fine filter 142 is attached inside the filter housing 124.
  • This fine filter 142 is formed in this embodiment as a filter element 142, which has a sealing projection 144, a filter wall 146 and a sewage nozzle 148 and which can be inserted from above into the filter housing 124.
  • a fine filter 142 it is also possible to use a fine sieve, preferably with sieve holes having a diameter of less than 1.5 mm, particularly preferably less than 1.0 mm.
  • the fine filter 142 thus divides the interior of the filter housing 124 into a pure water space 150 and a waste water space 152.
  • the sealing projection 144 prevents rinse water 128 from directly entering the waste water space 152 from the pure water space 150 during backwashing, so that the rinse water 128 during backwashing the filter wall 146 must penetrate.
  • the sealing insert 144 seals the fine filter 142 against the filter housing 124.
  • the sealing projection 144 is designed in such a way as a funnel approach that prevents rinse water 128 can pass through the Grobsieb 138 directly into the pure water space 150.
  • the rinse water 128 flows through the filter wall 146 from the dirty water space 152 into the pure water space 150 (normal operation). In this case, fine dirt particles are filtered out on the inside of the filter wall 146.
  • the filtered rinse water 128 then flows from the pure water chamber 150 through a drain pipe 154 in the lower region of the filter housing 124 to the rinse water storage tank 122 again.
  • a pressure sensor 156 is used, which detects the rinse water pressure in the fine filter 142.
  • the pressure sensor 156 may, for example, also be arranged in a sewer line 168 (in front of a valve 164). An output of this pressure sensor 156 is supplied to an electronic control unit 158.
  • This electronic control unit 158 can, for example, if a certain level of pressure or a certain amount of dirt in the dirty water space 152 is reached, by appropriate control of a wastewater pump 160, a backwash 162 and various valves 164 (optional) initiate a backwash.
  • rinse water 128 thus flows through the filter wall 146 in the direction from the dirty water space 152 to the pure water space 150.
  • the flow direction of the rinse water 128 through the filter wall 146 is reversed.
  • the wastewater pump 160 sucks flushing water 128 out of the dirty water chamber 152 of the fine filter 142 via the sewage nozzle 148 and conveys it via a sewer line 168 into a waste water drain 166.
  • rinse water 128 is sucked out of the rinse water storage tank 122 via a backwash line 170 by means of the backwash pump 162 and pumped via a toilet waters 172 in the outlet pipe 154 so that the flow of flushing water 128 is disturbed by the drain pipe 154.
  • the backwash 172 is disposed at an angle of about 40 ° to the drain port 154.
  • the rinsing liquid 128, which is pumped through the backwash nozzle 172 into the outlet nozzle 154 has a flow direction counter to the flow direction of the rinse water 128 in normal operation (in FIG. 1 symbolically indicated by the arrow 174).
  • the sewage pump 160 and the backwash pump 162 may be provided, for example, by a common pump motor (in FIG FIG. 1 not shown) are operated. This is due in particular to the fact that the wastewater pump 160 and the backflushing pump 162 are required and operated simultaneously in the backflushing operation.
  • the entire operation ie in particular the switching from normal operation to backwashing operation, can be controlled by the electronic control unit 158, which may be part of a comprehensive control unit for the entire multi-tank dishwasher 110, for example.
  • a rinsing operation of the multi-tank dishwasher 110 does not have to be interrupted for the backwashing.
  • FIG. 2 is a section of an according to the execution FIG. 1 alternative embodiment of a Spülwasservorratstanks 122 shown.
  • the right angle bent sewage nozzle 154 and the backwash 172 are arranged on the direction away from the rinse water supply 128 left outer wall of the filter housing 124.
  • the drain device 154 is not formed in this embodiment as a pipe socket as in the embodiment according to. FIG. 1 but essentially has a simple opening to the rinse water storage tank 122.
  • the backwash device has a baffle surface 210 as a deflection device, which extends beyond the lower edge of the backwash nozzle 172 downwards.
  • This deflector 210 causes rinse water 128 to exit the filter housing 124 in a flow direction 174 at an angle to the vertical during normal operation. If rinse water 128 is pumped through the backwash stub 172 into the pure water space 150 in the backwash mode, this deflection device causes the rinse water 128 pumped through the backwash stub 172 to hit the rinse water 128 leaving the pure water space 150 through the drainage device 154 at an angle of ⁇ 90 ° , The backwashed rinse water 128 thus has a speed component opposite to the flow direction in normal operation 174 and thus disturbs the outflow of the rinse water 128 through the drainage device 154. Thus, in the backwash mode with the backwash pump 162 running and wastewater pump 160 in the pure water space 150, a higher pressure than in the dirty water room 152nd build so that the filter wall 146 is backwashed optimally.
  • FIG. 3 is a respect to the execution according to FIG. 2 slightly modified embodiment illustrated.
  • the main difference in this embodiment is that the drain device 154 is designed here as a simple opening in the bottom of the filter housing 124.
  • the baffle 210 does not extend beyond the bottom of the filter housing 124.
  • this embodiment is compared to the embodiment in FIG. 2 easier, but does not have the same backwashing effect, since the above-described "disturbance" of the flow of flushing water 128 from the pure water space 150 in the Spülwasservorratstank 122 by applying flushing water 128 with opposite speed component through the backwash 172 is not the same extent as in FIG. 2 , However, a backwashing effect according to the invention is also present in this exemplary embodiment.
  • FIG. 4 is one to the Figures 2 and 3 alternative, particularly preferred embodiment of the invention, in which the backwashing via the same port 154, 172 as the flow of rinse water 128 from the pure water space 150 in the Spülwasservorratstank 122.
  • the outflow of rinse water 128 from the pure water space 150 is carried out in the Spülwasservorrasttank
  • rinse water 128 from the rinse water tank 122 is pumped through the same backflush line 170 into the pure water space 150, with the backwash rinse water 128 having a speed exactly opposite to the flow direction 174 in normal operation.
  • the baffle 210 was omitted, but such a baffle 210 can be used in addition.
  • the filter housing 124 is open to the outside at a right angles to the filter housing 124 extending pump nozzle 410, which is extended in its cross-section compared to the turn right angle from the pump nozzle 410 branching backwash line 170.
  • a pump nozzle with a cross section of 80 mm can be used.
  • an axial pump 162 is used as the backwashing pump 162.
  • a pump motor 412 is placed on the outside of the pump neck 410 and drives a pump shaft 414 with attached rotor 416 in the pump neck 410.
  • a rotor 416 can be used, which still leaves an opening of about 70% of the pump nozzle 410. In this way, in normal operation, in which rinse water 128 flows in the flow direction 174 with the backwash pump 162 switched off through the pump neck 410, a low flow resistance ensured for the running rinse water 128.
  • the axial pump 162 ensures in this embodiment, a high volume flow of the backwashed rinse water 128 without too high a pressure in the pure water space 150 would be built, which could damage the fine filter 142 or push out of the filter housing 124.
  • a backwashing pump 162 which, during backwashing, has a pressure increase of not more than 0.5 bar, preferably not more than 0.2 bar and particularly preferably not more than 0.1 bar between suction and pump side and causes.
  • FIG. 4 illustrated embodiment can be technically easy to implement and allows for the reasons mentioned a particularly efficient and trouble-free backwash the multi-chamber dishwasher 110th

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  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

Pour laver la vaisselle (116), on utilise, notamment dans le domaine professionnel, des lave-vaisselle à plusieurs cuves (110). L'invention concerne un lave-vaisselle à plusieurs cuves (110), dont la zone de lavage (112) comprend au moins un réservoir d'eau de lavage (122), au moins un boîtier de filtre (124), au moins un filtre fin (142) et au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210). En fonctionnement normal, une paroi (146) du filtre fin (142) est traversée dans le sens allant d'un espace pour l'eau sale (152) à un espace pour l'eau propre (150). Pour nettoyer le filtre fin (142), le lave-vaisselle à plusieurs cuves (110) peut fonctionner en lavage à contre-courant, sans interrompre le processus de lavage. Lors du lavage à contre-courant, la traversée de la paroi (146) de filtre par l'eau de lavage (128) est inversée par une pompe (162) de lavage à contre-courant et par une pompe pour eau usée (160). Les particules de salissures se trouvant sur la face interne de la paroi (146) du filtre sont alors évacuées au moyen de la pompe pour eau usée (160) dans un écoulement d'eau usée (166).

Claims (17)

  1. Lave-vaisselle à plusieurs cuves (110) avec au moins une zone de lavage (112) pour projeter de l'eau de lavage (128) sur des produits à laver (116) dans une chambre de lavage (113), dans lequel au moins une zone de lavage (112) présente ce qui suit :
    a) au moins un réservoir d'eau de lavage (122) ;
    b) au moins un boîtier de filtre (124) ;
    c) au moins un filtre fin (142) emboîté dans l'au moins un boîtier de filtre (124),
    - dans lequel l'au moins un filtre fin (142) divise au moins un espace intérieur de l'au moins un boîtier de filtre (124) en au moins un espace d'eau usée (152) et au moins un espace d'eau pure (150),
    - dans de l'eau de lavage (128) peut être projetée dans l'au moins un espace d'eau usée (152) à travers au moins au moins un afflux d'eau de lavage (138) provenant de la chambre de lavage (113), et
    - dans lequel l'au moins un filtre fin (142) présente au moins une paroi de filtre (146) de telle manière que l'eau de lavage (128) s'écoule dans un mode normal du lave-vaisselle à plusieurs cuves (110) de l'au moins un espace d'eau usée (152) par l'au moins une paroi de filtre (146) dans l'au moins un espace d'eau pure (150) ;
    d) au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210),
    - dans lequel l'au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210) présente au moins une canalisation d'eaux usées (168) reliée à l'au moins un espace d'eau usée (152) avec au moins une pompe d'eaux usées (160),
    caractérisé en ce que
    - l'au moins un espace d'eau pure (150) est relié à l'au moins un réservoir d'eau de lavage (122) par au moins un dispositif d'écoulement (154) ;
    - un flux d'eau de lavage peut être inversé entre l'au moins un espace d'eau pure (150) et l'au moins un espace d'eau usée (152) à travers l'au moins une paroi de filtre (146), au moyen du dispositif de lavage à contre-courant (160, 162, 168, 172, 210), dans un mode de lavage à contre-courant,
    - l'au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210) présente en outre au moins un retour d'eau de lavage (172) reliant l'au moins un réservoir d'eau de lavage (122) à l'au moins un espace d'eau pure (150) avec au moins une pompe de lavage à contre-courant (162).
  2. Lave-vaisselle à plusieurs cuves (110) selon la revendication précédente, caractérisé en ce que l'au moins un dispositif d'écoulement (154) présente au moins une tubulure d'écoulement (154) et/ou au moins une ouverture d'écoulement (154).
  3. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des deux revendications précédentes, caractérisé en ce que l'au moins un retour d'eau de lavage (172) est relié à l'au moins un dispositif d'écoulement (154).
  4. Lave-vaisselle à plusieurs cuves (110) selon la revendication précédente, caractérisé en ce qu'un sens d'écoulement (174) de l'eau de lavage (128) à travers l'au moins un dispositif d'écoulement (154) définit en mode normal un sens d'écoulement (174), dans lequel l'au moins un retour d'eau de lavage (172) est relié à l'au moins un dispositif d'écoulement (154) de sorte que de l'eau de lavage (128) peut être projetée dans l'au moins un dispositif d'écoulement (154) en mode de lavage à contre-courant par l'au moins un retour d'eau de lavage (172) avec une composante de vitesse à l'opposé du sens d'écoulement (174).
  5. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un retour d'eau de lavage (172) présente une tubulure de lavage à contre-courant (172) et en ce que l'au moins un dispositif d'écoulement (154) présente une tubulure d'écoulement (154), dans lequel la tubulure d'écoulement (154) et la tubulure de lavage à contre-courant (172) sont formées totalement ou partiellement par le même composant (172, 154,410).
  6. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une pompe de lavage à contre-courant (162) présente au moins une pompe axiale (162).
  7. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace intérieur de l'au moins un boîtier de filtre (124) présente au moins un capteur d'encrassement (156).
  8. Lave-vaisselle à plusieurs cuves (110) selon la revendication précédente, caractérisé en ce que l'au moins un capteur d'encrassement (156) présente au moins un capteur de pression (156) et/ou au moins un capteur de niveau de remplissage pour la mesure d'une pression et/ou d'un niveau de remplissage dans l'au moins un espace d'eau usée (152) et/ou l'au moins un espace d'eau pure (150).
  9. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un réservoir d'eau de lavage (122) présente au moins un crible de recouvrement de cuve (134), dans lequel l'eau de lavage (128) peut parvenir de la chambre de lavage (113) par l'au moins un crible de recouvrement de cuve (134) dans l'au moins un réservoir d'eau de lavage (122).
  10. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, dans lequel l'au moins un afflux d'eau de lavage (138) présente au moins un crible grossier (138).
  11. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un filtre fin (142) rend étanche l'au moins un espace intérieur de l'au moins un boîtier de filtre (124) de sorte qu'une pénétration directe de l'eau de lavage (128) de l'au moins un espace d'eau pure (150) dans l'au moins un espace d'eau usée (152) est empêchée en mode de lavage à contre-courant.
  12. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé par au moins un dispositif de commande (158) électronique pour la commutation entre le mode normal et le mode de lavage à contre-courant, dans lequel en mode de lavage à contre-courant, l'au moins une pompe de lavage à contre-courant (162) et l'au moins une pompe d'eaux usées (160) peuvent être commandées par l'au moins un dispositif de commande (158) électronique.
  13. Lave-vaisselle à plusieurs cuves (110) selon la revendication précédente, caractérisé en ce que la commutation entre le mode normal et le mode de lavage à contre-courant est effectuée automatiquement en fonction d'un degré d'encrassement.
  14. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un filtre fin (142) est configuré comme un élément filtrant (142) interchangeable avec une tubulure d'eau usée (148).
  15. Lave-vaisselle à plusieurs cuves (110) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une pompe d'eaux usées (160) et l'au moins une pompe de lavage à contre-courant (162) sont entraînées conjointement par un moteur de pompe.
  16. Procédé de fonctionnement d'un lave-vaisselle à plusieurs cuves (110) avec un mode normal et un mode de lavage à contre-courant,
    - dans lequel le lave-vaisselle à plusieurs cuves (110) présente au moins une zone de lavage (112) pour projeter de l'eau de lavage (128) sur des produits à laver (116) dans une chambre de lavage (113), au moins un réservoir d'eau de lavage (122) et au moins un boîtier de filtre (124) avec au moins un filtre fin (142) emboîté dans l'au moins un boîtier de filtre (124) avec au moins une paroi de filtre (146),
    - dans lequel le lave-vaisselle à plusieurs cuves (110) présente en outre au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210) avec au moins un retour d'eau de lavage (172) relié à l'au moins un espace d'eau pure (150) avec au moins une pompe de lavage à contre-courant (162) et au moins une canalisation d'eaux usées (168) reliée à l'au moins un espace d'eau usée (152) avec au moins une pompe d'eaux usées (160),
    - dans lequel l'au moins un filtre fin (142) divise au moins un espace intérieur de l'au moins un boîtier de filtre (124) en au moins un espace d'eau usée (152) et au moins un espace d'eau pure (150),
    - dans lequel de l'eau de lavage (128) peut être projetée dans l'au moins un espace d'eau usée (152) par au moins un afflux d'eau usée (138) provenant de la chambre de lavage (113), et
    - dans lequel en mode normal, de l'eau de lavage (128) s'écoule de l'au moins un espace d'eau usée (152) par l'au moins une paroi de filtre (146) dans l'au moins un espace d'eau pure (150) et de là par l'au moins un dispositif d'écoulement (154) dans l'au moins un réservoir d'eau de lavage (122),
    caractérisé en ce que
    - l'au moins un espace d'eau pure (150) est relié à l'au moins un réservoir d'eau de lavage (122) par au moins un dispositif d'écoulement (154), et
    - en mode de lavage à contre-courant, un flux d'eau de lavage est inversé, par rapport au mode normal, au moyen de l'au moins un dispositif de lavage à contre-courant (160, 162, 168, 172, 210), entre l'au moins un espace d'eau pure (150) et l'au moins un espace d'eau usée (152) à travers l'au moins une paroi de filtre (146) dans lequel de l'eau de lavage (128) s'écoule du réservoir d'eau de lavage (122) par l'au moins une paroi de filtre (146) dans l'au moins un espace d'eau usée (152) et de là dans l'au moins une canalisation d'eaux usées (168).
  17. Procédé selon la revendication précédente, dans lequel un mode de lavage du lave-vaisselle à plusieurs cuves (110) est effectué indépendamment du fait que le filtre fin (142) est justement traversé en mode normal ou en mode de lavage à contre-courant.
EP06706474A 2005-02-28 2006-01-30 Lave-vaisselle à plusieurs cuves, équipé d'un dispositif de lavage à contre-courant Active EP1835840B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005008987A DE102005008987B3 (de) 2005-02-28 2005-02-28 Mehrtankgeschirrspülmaschine mit Rückspülvorrichtung
PCT/EP2006/000760 WO2006092195A1 (fr) 2005-02-28 2006-01-30 Lave-vaisselle à plusieurs cuves, équipé d'un dispositif de lavage à contre-courant

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EP1835840A1 EP1835840A1 (fr) 2007-09-26
EP1835840B1 true EP1835840B1 (fr) 2009-07-15

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US (1) US7935195B2 (fr)
EP (1) EP1835840B1 (fr)
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WO2006092195A1 (fr) 2006-09-08
EP1835840A1 (fr) 2007-09-26
US7935195B2 (en) 2011-05-03
DE102005008987B3 (de) 2006-06-01
DE502006004228D1 (de) 2009-08-27
US20080041419A1 (en) 2008-02-21

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