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EP4306030B1 - Lave-vaisselle avec système d'évacuation des saletés - Google Patents

Lave-vaisselle avec système d'évacuation des saletés

Info

Publication number
EP4306030B1
EP4306030B1 EP23185609.7A EP23185609A EP4306030B1 EP 4306030 B1 EP4306030 B1 EP 4306030B1 EP 23185609 A EP23185609 A EP 23185609A EP 4306030 B1 EP4306030 B1 EP 4306030B1
Authority
EP
European Patent Office
Prior art keywords
dirt
dishwasher
washing
wash
washing liquid
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
EP23185609.7A
Other languages
German (de)
English (en)
Other versions
EP4306030A1 (fr
Inventor
Harald Disch
Martin Schrempp
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP4306030A1 publication Critical patent/EP4306030A1/fr
Application granted granted Critical
Publication of EP4306030B1 publication Critical patent/EP4306030B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • 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
    • 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
    • A47L15/4204—Flat 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
    • 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
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
    • 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
    • A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/03—Water recirculation, e.g. control of distributing valves for redirection of water flow
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the invention relates generally to the field of commercial dishwashing.
  • the invention relates to a dishwasher according to the preamble of patent claim 1. Accordingly, the invention relates in particular to a commercial dishwashing or utensil washing machine which is designed as a programmer or as a conveyor dishwasher.
  • the invention is thus directed to a dishwasher having at least one wash zone configured as a recirculation circuit.
  • the wash zone configured as a recirculation circuit has a nozzle system with at least one wash nozzle for spraying wash liquid onto the items to be cleaned, a wash tank for collecting at least a portion of the sprayed wash liquid, and a wash pump for supplying wash liquid collected in the wash tank to the at least one wash nozzle.
  • the dishwasher has a dirt collection system associated with the at least one wash zone, with at least one tank cover sieve, to separate dirt particles from the sprayed wash liquid flowing back into the wash tank by gravity.
  • Such dishwashers are known, for example, from the respective documents DE 10 2005 008 987 B3 , DE 10 2011 084917 A1 , US 2011/197934 A1 and CN 113 940 601 A known.
  • Box-type ware washers are manually loaded and unloaded dishwashers. These box-type ware washers, also called batch ware washers, can be pass-through dishwashers, also called hood-type ware washers, or front-loaders. Front-loaders can be under-counter machines, top-counter machines, or free-standing front-loading dishwashers.
  • a dishwasher designed as a programmable automatic dishwasher typically has a treatment chamber for cleaning dishes.
  • a wash tank is usually located below the treatment chamber, into which liquid from the treatment chamber can flow back by gravity.
  • the wash tank contains wash liquid, which is usually water, to which detergent can be added if necessary.
  • a dishwasher designed as a programmable automatic dishwasher further comprises a wash system with a wash pump, a pipe system connected to the wash pump, and a nozzle system with at least one wash nozzle.
  • the wash liquid in the wash tank can be pumped from the wash pump via the pipe system to the at least one wash nozzle, and sprayed onto the items to be cleaned by this at least one wash nozzle in the treatment chamber.
  • the sprayed wash liquid then flows back into the wash tank by gravity.
  • Conveyer ware washers are primarily flight-type ware washers or rack-type ware washers. Conveyer ware washers are typically used in commercial applications. Unlike programmable dishwashers, where the ware remains stationary in the machine during cleaning, conveyor ware washers transport the ware through various treatment zones.
  • a conveyor dishwasher usually has at least one pre-wash zone and at least one main wash zone, which is arranged after the pre-wash zone(s) in the direction of transport of the wash items. Viewed in the direction of transport after the main wash zone(s) there is usually at least one final wash zone or pre-rinse zone and at least one final rinse zone downstream of the final wash zone(s). Viewed in the direction of transport, the wash items, which are either picked up directly on the conveyor belt or held by baskets, usually run through an inlet tunnel, the subsequent pre-wash zone(s), main wash zone(s), final wash zone(s), final rinse zone(s), and a drying zone into an outlet section.
  • Each of the aforementioned wash zones of the conveyor dishwasher is assigned a wash system comprising a wash pump and a line system (wash line system) connected to the wash pump, via which wash liquid is supplied to the nozzle system or to the at least one wash nozzle of the nozzle system.
  • the wash liquid supplied to the at least one wash nozzle of the nozzle system is sprayed onto the washware in the respective wash zones of the conveyor dishwasher, which is transported through the respective wash zones by a transport device of the conveyor dishwasher.
  • Each wash zone is assigned a reservoir in which the liquid sprayed by the wash nozzles is collected and/or in which liquid is provided for the nozzle systems of the respective treatment zones.
  • rinse aid in the form of fresh water which can be pure or mixed with other additives such as rinse aid, is sprayed onto the washware via the spray nozzles in the rinse zone. At least a portion of the sprayed rinse aid is transported from zone to zone via a cascade system, counter to the direction of travel of the washware.
  • the sprayed final rinse liquid is collected in a tank (post-wash tank) in the post-wash zone, from which it is pumped to the spray nozzles (post-wash nozzles) of the post-wash zone via the wash pump of the wash system belonging to the post-wash zone.
  • wash liquid is rinsed off the dishes.
  • the resulting liquid flows into the wash tank of at least one main wash zone, which is located upstream of the post-wash zone in the transport direction of the dishes.
  • the liquid is usually provided with a cleaner and sprayed onto the dishes by a pump system (wash pump) belonging to the wash system of the main wash zone via the nozzles (wash nozzles) of the main wash zone.
  • the liquid then flows - unless another main wash zone is provided - into the pre-wash tank of the pre-wash zone.
  • the liquid in the pre-wash tank is pumped to the pre-wash zone via a pump system belonging to the wash system of the pre-wash zone. (Pre-wash pump) sprays the detergent onto the dishes via the pre-wash nozzles of the pre-wash zone in order to remove coarse impurities from the dishes.
  • Dishwashers are typically equipped with rinse pumps that supply the rinse aid to be sprayed into the rinse zone's piping system. This ensures, in particular, a virtually constant volume flow of rinse aid in the rinse zone.
  • the on-site line pressure for example, the fresh water supply pressure—to supply the rinse aid to the piping system of the rinse zone.
  • a controllable valve can be provided between the piping system and the spray nozzles of the rinse zone to temporarily or completely interrupt the supply of rinse aid to the spray nozzles.
  • a dishwasher is designed as a program machine or as a conveyor dishwasher
  • commercial dishwashers usually comprise at least one washing zone designed as a recirculation circuit, which has a nozzle system with at least one washing nozzle for spraying washing liquid onto the items to be cleaned, a washing tank for collecting at least part of the sprayed washing liquid and a washing pump for supplying liquid collected in the washing tank to the at least one washing nozzle.
  • a wash zone designed as a recirculation circuit is used to clean the wash ware, at least a portion of the wash liquid already sprayed in the wash zone is circulated, resulting in the risk that the protective particles removed from the wash ware will be increasingly broken down due to the constant circulation of the wash liquid and thus can no longer be easily separated from the wash liquid using sieves, etc. Accordingly, there is a risk that, with a wash zone designed as a recirculation circuit, the dirt load in the wash liquid in the wash zone will increase with increasing wash time, increasing the risk of re-soiling of the wash ware and worsening the overall wash result.
  • dishwashers designed as conveyor dishwashers it is known to equip at least the pre-wash tank associated with the pre-wash zone, and preferably also the main wash tank associated with the at least one main wash zone, with surface sieves and dirt sieve baskets.
  • the dishwasher which is designed either as a program-controlled or conveyor-type dishwasher
  • the dirt particles washed off the washware by the circulating wash water fall due to gravity onto the surface sieves. There, the dirt particles are separated from the wash liquid flowing back into the corresponding wash tank. The separated dirt particles are then usually rinsed into a dirt sieve basket.
  • the aim remains to further reduce the amount of fresh water used for rinsing, which will of course exacerbate the above-mentioned problem in the long term, as at a certain point there will no longer be enough wash water available to pump out the dirt or to operate the automatic dirt discharge system reliably.
  • the invention is therefore based on the object of developing a dishwasher of the type mentioned at the outset in such a way that the dirt removal performance can be optimized without increasing the amount of fresh water required to operate the dishwasher.
  • the invention relates to a dishwasher designed as a programmable automatic or conveyor dishwasher, and comprising a dirt collection system associated with at least one wash system of the dishwasher.
  • the dirt collection system comprises a dirt collection area arranged at least partially in the wash tank of the dishwasher.
  • the dirt collection area serves to collect the dirt particles separated from the wash liquid by means of a tank cover sieve.
  • a dirt discharge system with a dirt discharge pipe system that is fluidly connected to the dirt collection area is provided, via which the dirt collection area of the dishwasher can be emptied, in particular as needed.
  • the dishwasher according to the invention is characterized in particular in that a separator device is assigned to the dirt discharge system, which separator device is designed to separate at least a part of the washing liquid required for emptying the dirt collection area and discharged together with the dirt particles from the dirt collection area from the dirt particles discharged from the dirt collection area and to return the separated washing liquid back to the water circuit of the dishwasher.
  • This solution provides an automatic dirt removal system for dishwashers in which the amount of dirt and water pumped out is independent of the amount of fresh water flowing in during the rinse cycle. This optimizes the dishwasher's dirt removal performance, as the dirt collection area of the dirt removal system can operate independently of the amount of fresh water supplied to the dishwasher's water circuit per unit of time. At the same time, the recycling of the separated wash liquid ensures that the dishwasher's water consumption cannot be increased.
  • the dirt discharge system is configured with the separator device to feed the wash liquid separated from the dirt particles removed from the dirt collection area back into the wash tank of the dishwasher's washing system, which is equipped with the automatic dirt discharge system.
  • the wash liquid separated in the separator device is fed to the wash tank of another treatment zone.
  • the dirt discharge system comprises a dirt discharge pump whose suction side is fluidly connected or connectable to the dirt collection area, and whose pressure side is fluidly connected or connectable to the separator device.
  • the dishwasher has a control device which is designed, in particular, to control the dirt discharge pump of the dirt discharge system independently of the introduction of fresh water into the water circuit of the dishwasher.
  • the dirt removal system can actually be activated whenever the degree of soiling of the washing liquid has reached a critical level, whereby in particular it is not necessary to pay attention to whether a sufficient amount of fresh water is also fed back into the water circuit of the dishwasher.
  • the dishwasher is provided with a sensor system configured to detect a degree of soiling of the washing liquid, preferably in the at least one wash tank of the dishwasher, and/or to detect a soil load of the items to be treated in the dishwasher.
  • the control device is configured to control the soil discharge pump of the soil discharge system depending on the detected degree of soiling of the washing liquid and/or depending on the detected soil load of the items to be treated in the dishwasher.
  • a suitable sensor could be a turbidity sensor that detects the degree of soiling in the wash liquid.
  • an optical system particularly a vision camera system, which measures or detects the soil load directly on the washware.
  • control device is designed to automatically activate the dirt discharge pump of the dirt discharge system when the sensor system detects that the detected degree of contamination of the washing liquid exceeds a predetermined or has reached a definable value, and/or when the sensors detect an increased dirt load in the items being treated in the dishwasher.
  • Either automatic or manual activation of the dirt discharge pump of the dirt discharge system is, of course, also conceivable.
  • the separator device has a collecting container which is fluidly connected or connectable to the dirt discharge pipe system of the dirt discharge system and to which the washing liquid required for emptying the dirt collection area with the dirt particles from the dirt collection area is supplied when the dirt collection area is emptied.
  • the collecting container is assigned a sieve system with which at least a portion of the washing liquid required to empty the dirt collection area and discharged together with the dirt particles from the dirt collection area is separated from the dirt particles discharged from the dirt collection area.
  • the separator device is designed to preferably automatically remove the dirt particles separated from the washing liquid in the separator device.
  • a pump in particular a screw conveyor pump.
  • an overflow system is provided for the collecting container of the separator device, which connects the collecting container to an on-site drain or to the wash tank of the dishwasher. This provides redundancy should the return of the separated wash liquid from the separator device to the dishwasher's water circuit be disrupted or interrupted.
  • the separator device is assigned a waste water pump which is designed, in particular as needed, to feed the washing liquid separated in the separator device back into the circuit of the dishwasher at predetermined times and/or events or continuously.
  • the separator device is assigned a sensor system which is designed to detect the quantity of washing liquid separated in the separator device.
  • a control device is assigned to the separator device, which is designed to control the waste water pump depending on the amount of washing liquid separated from the dirt particles in the separator device.
  • the wastewater pump is controlled cyclically, at least as needed or at predetermined or definable times or events, in particular in such a way that at least partial flushing of the screening system of the separator device can be achieved (if necessary).
  • the separator device has a filter system which is designed to filter the washing liquid separated from the dirt particles in the separator device before it is returned to the water circuit of the dishwasher.
  • a heat exchanger system is assigned to the separator device, in order to recover thermal energy, particularly on demand or continuously, from the washing liquid separated from the dirt particles in the separator device. This thermal energy can then be used, for example, to heat the fresh water supplied to the dishwasher.
  • the solution according to the invention thus enables regular or continuous soil removal during dishwasher operation without having to extend the dishwasher's running time and without increasing the dishwasher's fresh water consumption. This not only reduces the risk of re-soiling of the washware (since regular or continuous soil removal optimizes the quality of the wash liquid), but also does not negatively impact the dishwasher's capacity.
  • the solution according to the invention therefore allows the dirt particles collected in at least one wash zone of the dishwasher by means of the dirt collection system to be continuously and automatically removed from the dishwasher. Such continuous and automatic dirt removal also relieves the burden on the dishwasher's operating personnel. Furthermore, it can effectively prevent the recirculation of the wash liquid in the wash zone from being affected or blocked by overfilling the dirt collection area.
  • FIG. 1 An example of a conveyor dishwasher 50 constructed according to the teachings of the present invention is shown in a schematic longitudinal sectional view.
  • the conveyor dishwasher 50 as shown in FIG. 1 has a pre-wash zone 51 and a main wash zone 52, which in the transport direction T of the (in FIG. 1 not shown) wash ware seen after the pre-wash zone 51. Viewed in the transport direction T after the main wash zone 52, FIG. 1
  • the conveyor dishwasher 50 shown has a post-wash or pre-wash zone 53 and a final rinse zone 54 downstream of the post-wash or pre-wash zone 53.
  • the wash ware which is either picked up directly on a conveyor belt 58 or held by baskets, runs in the transport direction T through an inlet tunnel 55, the adjoining pre-wash zone 51, the main wash zone 52, the post-wash zone 53, the final rinse zone 54 and a drying zone 56 into an outlet section 57.
  • the aforementioned treatment zones 51, 52, 53, 54 of the conveyor dishwasher 50 are each assigned spray nozzles 13-1, 13-2, 13-3, 13-4, via which liquid is sprayed onto the wash ware transported by the conveyor belt 58 through the respective treatment zones 51, 52, 53, 54.
  • At least the pre-wash zone 51, the main wash zone 52, and the post-wash or pre-rinse zone 53 are each assigned a tank (wash tank 14-1, 14-2, 14-3), in which sprayed wash liquid is collected and/or wash liquid is provided for the spray nozzles 13-1, 13-2, 13-3 of the respective zones 51, 52, 53.
  • the first embodiment of the invention shown each has a washing system 10-1, 10-2, 10-3.
  • Each washing system 10-1, 10-2, 10-3 consists of a washing pump 11-1, 11-2, 11-3, a line system 12-1, 12-2, 12-3 connected to the washing pump 11-1, 11-2, 11-3, and the spray nozzles 13-1, 13-2, 13-3 connected to the line system 12-1, 12-2, 12-3.
  • FIG. 1 A schematically illustrated control device 100 is provided which serves (among other things) to suitably control the respective washing pumps 11-1, 11-2, 11-3 of the washing systems 10-1, 10-2, 10-3 during a washing process in order to supply washing liquid, at least temporarily, via the associated line system 12-1, 12-2, 12-3 to the spray nozzles 13-1, 13-2, 13-3 of the nozzle system associated with the respective washing system 10-1, 10-2, 10-3.
  • rinse aid liquid in the form of fresh water which may be mixed with further chemical additives such as rinse aid, is sprayed onto the FIG. 1 not shown items are sprayed.
  • laterally arranged spray nozzles 13-5 can be provided in the final rinse zone 54.
  • a portion of the rinse liquid sprayed in the rinse zone 54 is transported from zone to zone via a cascade system, counter to the transport direction T of the washware. The remaining portion is directed directly into the pre-wash tank 14-1 of the pre-wash zone 51 via a valve 59 and a bypass line 60.
  • the rinse liquid sprayed in the final rinse zone 54 is collected in the tank (post-wash or pre-wash tank 14-3) of the post-wash or pre-wash zone 53, from which it is pumped to the spray nozzles 13-3 (post-wash or pre-wash nozzles) of the post-wash or pre-wash zone 53 via the wash pump 11-3 belonging to the wash system 10-3 of the post-wash or pre-wash zone 53.
  • wash liquid is rinsed off the washware.
  • the resulting liquid flows into the wash tank 14-2 of the main wash zone 52, is usually provided with a chemical cleaner and is sprayed onto the washware via the spray nozzles 13-2 (wash nozzles) of the wash system 10-2 belonging to the main wash zone 52 with the aid of a wash pump 11-2 belonging to the wash system 10-2 of the main wash zone 52.
  • the washing liquid then flows into the pre-wash tank 14-1 of the pre-wash zone 51.
  • the washing liquid collected in the pre-wash tank 14-1 is sprayed onto the washware in the pre-wash zone 51 by means of a wash pump 11-1 belonging to the wash system 10-1 of the pre-wash zone 51 via the spray nozzles 13-1 (pre-wash nozzles) of the wash system 10-1 belonging to the pre-wash zone 51 in order to remove coarse contaminants from the washware.
  • the main wash zone 52 has a tank cover screen 20-2, which is arranged above the main wash tank 14-2.
  • washing liquid is sprayed onto the washware via the spray nozzles 13-2 (wash nozzles) of the wash system 10-2.
  • the sprayed washing liquid flows back into the wash tank 14-2 of the main wash zone 52 by gravity, wherein the dirt particles rinsed from the washware in the main wash zone 52 are retained by the tank cover screen 20-2, provided the dirt particles are larger than the mesh size of the tank cover screen 20-2.
  • the mesh size of the tank cover screen 20-2 is preferably approximately 1 mm to 4 mm.
  • the washing operation must be interrupted to clean the tank cover sieve 20-2 in order to be able to clean the tank cover sieve 20-2 manually.
  • the pre-wash zone 51 is equipped with a tank cover screen 20-1 designed as a flat screen. This tank cover screen 20-1 is arranged above the wash tank (pre-wash tank 14-1) of the pre-wash zone 51 to separate dirt particles from the wash liquid sprayed in the pre-wash zone 51 and flowing back into the pre-wash tank 14-1 by gravity.
  • the mesh size of the tank cover screen 20-1 is preferably in a range between approximately 1 mm and 4 mm.
  • the conveyor dishwasher 50 shown is equipped with a dirt collection system 70 assigned to the pre-wash zone 51, which has a dirt collection area 71-1 arranged in the pre-wash zone 51, and in particular within the pre-wash tank 14-1.
  • FIG. 1 shown conveyor dishwasher 50 used dirt collection system 70 is explained below with particular reference to the presentation in FIG. 2 described in more detail.
  • the dirt collection area 71-1 serves to collect the dirt particles separated from the washing liquid by means of the tank cover sieve 20-1.
  • the dirt collection area 71-1 is designed as an upwardly open chamber arranged in the pre-wash tank 14-1, which can have a pressure equalization system on its sides.
  • the dirt particles separated by the tank cover sieve 20-1 can enter the chamber-shaped dirt collection area 71-1 via the upper opening. Because the dirt collection area 71-1 has a pressure equalization system on its sides, particularly rapid emptying of the dirt collection area 71-1 is possible.
  • the tank cover sieve 20-1 is arranged above the dirt collection area 71-1 and has a drainage slope in the form of a gradient directed in the direction of a feed opening 22, wherein the upwardly open dirt collection area 71-1 is arranged below the feed opening 22, so that the dirt particles separated with the aid of the tank cover sieve 22 can reach the dirt collection area 71-1 via the feed opening 22.
  • the tank cover screen 20-1 is at least partially funnel-shaped, wherein the supply opening 22 is formed within the funnel-shaped region 21 of the tank cover screen 20-1, and preferably in the zenith of the funnel-shaped region 21 of the tank cover screen 20-1 (cf. in particular the illustration in FIG. 2 ).
  • the FIG. 1 The dirt collection system 70 used in the illustrated embodiment further comprises a dirt discharge system 70 connected to the dirt collection area 71-1, for example consisting of a standpipe 72-1 and a dirty water line 73-1, for discharging the Dirt particles collected in the dirt collection area 71-1 from the pre-wash zone 51.
  • a dirt removal pump 74-1 is arranged in the dirt removal system 70; 72-1, 73-1.
  • the suction-side inlet of the dirt removal pump 74-1 is connected to the lower area of the dirt collection area 71-1 via the standpipe 72-1 belonging to the dirt removal system 70.
  • the pressure-side outlet of the dirt removal pump 74-1 opens into the wastewater line 73-1 belonging to the dirt removal system 70.
  • the wastewater line 73-1 leads to a separator device 80, which can be arranged outside the pre-wash zone 51 in front of the inlet tunnel 55 of the conveyor dishwasher 50.
  • the separator device 80 is designed to separate at least a portion of the washing liquid required to empty the dirt collection area 71-1 and discharged together with the dirt particles from the dirt collection area 71-1 from the dirt particles discharged from the dirt collection area 71-1 and to return the separated washing liquid to the water circuit of the dishwasher 50.
  • the washing liquid separated from the dirt particles discharged from the dirt collection area 71-1 is fed back to the washing tank 14-1 of the dishwasher 50.
  • the dirt discharge pump 74-1 is fluidly connected or connectable with the dirt collection area 71-1 with its suction side and fluidly connected or connectable with the separator device 80 with its pressure side.
  • the dirt discharge pump 74-1 can be activated independently of the introduction of fresh water into the water circuit of the dishwasher 50.
  • the dishwasher 50 has a sensor system which is designed to detect a degree of soiling of the washing liquid, preferably in the wash tank 14-1 of the dishwasher 50, and/or to detect a soil load of the items to be treated in the dishwasher 50.
  • the dirt discharge pump 74-1 of the dirt discharge system 70 is controlled depending on the detected degree of soiling of the washing liquid and/or depending on the detected dirt load of the items to be treated in the dishwasher 50.
  • the separator device 80 has a collecting container 81 which is fluidly connected or connectable to the dirt discharge system 70 and to which the washing liquid required for emptying the dirt collection area 71-1 with the dirt particles from the dirt collection area 71-1 is supplied when the dirt collection area 71-1 is emptied.
  • the collecting container 81 is assigned a sieve system 82, with which at least a part of the washing liquid required for emptying the dirt collection area 71-1 and discharged together with the dirt particles from the dirt collection area 71-1 is separated from the dirt particles discharged from the dirt collection area 71-1.
  • the separator device 80 is assigned a waste water pump 83, which is designed to feed the washing liquid separated in the separator device 80 back into the water circuit of the dishwasher 50, preferably as needed, at predetermined times and/or events or continuously.
  • FIG. 2 a second exemplary embodiment of the dishwasher 50 according to the invention is shown, which is a dishwasher 50 designed as a program machine, which has a single treatment chamber in which washing liquid is sprayed onto the items to be washed via spray nozzles.
  • a dirt discharge system 70 is arranged, as previously described in principle with reference to the FIG. 1 As with the conveyor dishwasher 50 shown in FIG. 1
  • a separator device 80 is assigned to the automatic dirt discharge system 70.
  • the dirt collection system 70 is arranged within the wash tank 14 of the dishwasher 50, which is designed as a programmable automatic dishwasher.
  • the dirt collection system 70 has a tank cover strainer 20, which is preferably arranged in the wash tank 14 above the liquid level of the wash liquid held in the wash tank 14.
  • the tank cover strainer 20 serves to separate dirt particles from the sprayed wash liquid that flows back into the wash tank by gravity. For this reason, a suitable mesh size must be provided for the tank cover strainer 20.
  • the dirt collection system 70 also includes a dirt collection area 71, which is designed as a chamber that is open at the top.
  • the dirt particles separated by the tank cover screen 20 are fed to the dirt collection area 71 via the opening of the chamber-shaped dirt collection area 71.
  • the tank cover screen 20 has a drainage slope in the form of a gradient directed toward a supply opening 22, with the upwardly open dirt collection area 71 being arranged below the supply opening 22.
  • the tank cover screen 20 is funnel-shaped at least in some areas, wherein the supply opening 22 is formed within the funnel-shaped area 21 of the tank cover screen 20, and preferably in the tapered area of the funnel-shaped area 21 of the tank cover screen 20.
  • the dirt collecting area 71 is funnel-shaped at the upper end in order to be able to be inserted or received into the feed opening 22 of the tank cover sieve 20.
  • washing liquid is sprayed, with a portion of the sprayed washing liquid flowing back into the washing tank 14 via the tank cover strainer 20.
  • the remaining portion of the sprayed washing liquid flows by gravity directly into the dirt collection area 71 via the inlet opening 22 provided in the tank cover strainer 20.
  • the dirt collection system 70 preferably further comprises a dirt discharge pipe system.
  • This dirt discharge pipe system consists in the FIG. 2
  • the illustrated embodiment of the dirt removal system 70 consists of a standpipe 72, which is connected to the lower region of the dirt collection area 71.
  • the standpipe 72 is connected to the suction-side inlet of a dirt removal pump 74.
  • the pressure-side outlet of the dirt removal pump 74 opens into a dirty water line 73, so that when the dirt removal pump 74 is activated, the contents of the dirt collection area 71 can be drained away from the washing zone.
  • the dirt discharge pump 74 is preferably designed to discharge the dirt particles collected in the dirt collection area 71, together with the washing liquid also collected in the dirt collection area 71, continuously or at predetermined times or events.
  • the dirt discharge pump 74 is controlled via the aforementioned controller 100 depending on the quantity of dirt particles collected in the dirt collection area 71.
  • the pumping out of dirt from the dirt collection area 71 takes place depending on the liquid level in the washing tank 14.
  • the dirty water line 73 leads to a separator device 80.
  • the separator device 80 is designed to separate at least a portion of the washing liquid required to empty the dirt collection area 71 and discharged together with the dirt particles from the dirt collection area 71 from the dirt particles discharged from the dirt collection area 71 and to return the separated washing liquid to the water circuit of the dishwasher 50.

Landscapes

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

Claims (13)

  1. Lave-vaisselle (50) ayant au moins un système de lavage (51, 52) configuré comme une boucle de recirculation, en particulier une machine à laver de la vaissellerie ou des ustensiles, qui est configurée comme une automatisation de programme ou comme un lave-vaisselle à convoyeur, dans lequel l'au moins un système de lavage (51, 52) comprend un système de buse ayant au moins une buse de lavage (13 ; 13-1, 13-2) pour pulvériser un liquide de lavage sur les articles à nettoyer, un réservoir de lavage (14 ; 14-1, 14-2) pour collecter l'au moins une portion du liquide de lavage pulvérisé, et une pompe de lavage (11 ; 11-1, 11-2) pour alimenter du liquide de lavage collecté dans le réservoir de lavage (14 ; 14-1, 14-2) vers l'au moins une buse de lavage (13 ; 13-1, 13-2), et dans lequel un système d'évacuation de salissures (70) est associé à l'au moins un système de lavage (51, 52) est prévu, dans lequel une grille de couvercle de réservoir (20-1) est associée au système d'évacuation de salissures (70), laquelle grille est configurée de manière à séparer les particules de salissures du liquide de lavage pulvérisé qui reflue dans le réservoir de lavage (14 ; 14-1, 14-2) par gravité, dans lequel le système d'évacuation de salissures (70) comprend une région de collecte de salissures (71) agencée au moins régionalement dans le réservoir de lavage (14 ; 14-1, 14-2) pour collecter les particules de salissures séparées du liquide de lavage au moyen de la grille de couvercle de réservoir (20-1), et dans lequel une pompe d'évacuation de salissures (74, 74-1) connectée fluidiquement à la région de collecte de salissures (71) est prévue, via laquelle la région de collecte de salissures (71) peut être vidée, en particulier si nécessaire, caractérisé en ce que la grille de couvercle de réservoir (20-1) est agencée au-dessus de la région de collecte de salissures (71) et présente une pente de drainage sous la forme d'un gradient dirigé vers
    une ouverture d'alimentation (22), dans lequel la région de collecte de salissures (71) est ouverte au sommet et agencée en dessous de l'ouverture d'alimentation (22), de sorte que les particules de salissures séparées au moyen de la grille de couvercle de réservoir (20-1) puissent passer à travers l'ouverture d'alimentation (22) dans la région de collecte de salissures (71), dans lequel un appareil séparateur (80) est attribué au système d'évacuation de salissures (70), qui est conçu pour séparer l'au moins une partie du liquide de lavage nécessaire pour vider la région de collecte de salissures (71) et évacuée avec les particules de salissures de la région de collecte de salissures (71) des particules de salissures évacuées de la région de collecte de salissures (71) et pour renvoyer le liquide de lavage séparé vers la circulation d'eau du lave-vaisselle (50), dans lequel le côté d'aspiration de la pompe d'évacuation de salissures (74 ; 74-1) est connecté ou peut être connecté fluidiquement à la région de collecte de salissures (71), et dans lequel le côté de pression de la pompe d'évacuation de salissures (74, 74-1) est connecté ou peut être connecté fluidiquement au dispositif séparateur (80), dans lequel le lave-vaisselle (50) a un dispositif de commande (100) qui est conçu pour actionner la pompe d'évacuation des salissures (74 ; 74-1) du système d'évacuation de salissures (70) sur la base d'un niveau de liquide dans le réservoir de lavage (14 ; 14-1, 14-2).
  2. Lave-vaisselle (50) selon la revendication 1,
    dans lequel le système d'évacuation de salissures (70) avec l'appareil séparateur (80) est configuré de manière à alimenter le liquide de lavage séparé des particules de salissures évacuées depuis la région de collecte de salissures (71) en retour vers le réservoir de lavage (14 ; 14-1, 14-2) du lave-vaisselle (50).
  3. Lave-vaisselle (50) selon la revendication 1 ou 2,
    dans lequel le dispositif de commande (100) est conçu pour actionner la pompe d'évacuation de salissures (74 ; 74-1) du système d'évacuation de salissures (70) indépendamment de l'eau propre entrant dans la circulation d'eau du lave-vaisselle (50).
  4. Lave-vaisselle (50) selon l'une quelconque des revendications 1 à 3,
    dans lequel le lave-vaisselle (50) comprend un système de capteur, qui est configuré de manière à détecter un niveau de souillage du liquide de lavage de préférence dans l'au moins un réservoir de lavage (14 ; 14-1, 14-2) du lave-vaisselle (50) et/ou
    à détecter un chargement en saletés des articles à laver dans le lave-vaisselle (50), dans lequel le dispositif de commande (100) est configuré de manière à actionner la pompe d'évacuation des salissures (74 ; 74-1) du système d'évacuation des salissures (70) en fonction du niveau détecté de souillage du liquide de lavage et/ou en fonction du chargement en saletés détecté des articles à laver dans le lave-vaisselle (50).
  5. Lave-vaisselle (50) selon l'une quelconque des revendications 1 à 4,
    dans lequel l'appareil séparateur (80) comprend un conteneur de collecte (81) qui est connecté ou peut être connecté fluidiquement au système d'évacuation de salissures (70), vers lequel, lors du vidage de la région de collecte de salissures (71), le liquide de lavage avec les particules de salissures, qui est nécessaire pour vider la région de collecte de salissures (71), est alimenté à partir de la région de collecte de salissures (71), dans lequel un système de grille (82) est associé au conteneur de collecte (81), avec lequel système de grille, l'au moins une portion du liquide de lavage nécessaire pour vider la région de collecte de salissures (71) et évacuée de la région de collecte de salissures (71) conjointement avec les particules de salissures est séparée des particules de salissures évacuées de la région de collecte de salissures (71).
  6. Lave-vaisselle (50) selon la revendication 5,
    dans lequel l'appareil séparateur (80) est configuré de manière à évacuer, de préférence automatiquement, de l'appareil séparateur (80) les particules de salissures séparées du liquide de lavage dans l'appareil séparateur (80).
  7. Lave-vaisselle (50) selon la revendication 5 ou 6,
    dans lequel un système de trop-plein est associé au conteneur de collecte (81) de l'appareil séparateur (80), lequel système connecte fluidiquement le conteneur de collecte (81) à un drain local ou au réservoir de lavage (14 ; 14-1, 14-2) du lave-vaisselle (50).
  8. Lave-vaisselle (50) selon l'une quelconque des revendications 1 à 7,
    dans lequel l'appareil séparateur (80) est associé à une pompe à eaux usées (83), qui est configurée, en particulier selon les besoins, de manière à renvoyer le liquide de lavage séparé dans l'appareil séparateur (80) vers la circulation d'eau du lave-vaisselle (50) à des temps et/ou événements prédéterminés ou en continu.
  9. Lave-vaisselle (50) selon la revendication 8,
    dans lequel l'appareil séparateur (80) est associé à un système de capteur configuré de manière à détecter la quantité de liquide de lavage séparée dans l'appareil séparateur (80), et dans lequel le dispositif de commande (100) est configuré de manière à actionner la pompe à eaux usées (83) en fonction de la quantité de liquide de lavage séparée des particules de salissures dans l'appareil séparateur (80).
  10. Lave-vaisselle (50) selon l'une quelconque des revendications 6 à 9 et la revendication 5,
    dans lequel un dispositif de commande (100) est configuré de manière à actionner cycliquement la pompe à eaux usées (83) au moins selon les besoins ou à des temps ou événements prédéterminés ou déterminables, en particulier de sorte que l'au moins un rinçage partiel du système de grille de l'appareil séparateur (80) peut être obtenu.
  11. Lave-vaisselle (50) selon l'une quelconque des revendications 1 à 10,
    dans lequel l'appareil séparateur (80) comprend un système de filtre configuré de manière à filtrer le liquide de lavage séparé des particules de salissures dans l'appareil séparateur (80) avant son retour vers la circulation d'eau du lave-vaisselle (50).
  12. Lave-vaisselle (50) selon l'une quelconque des revendications 1 à 11,
    dans lequel l'appareil séparateur (80) est associé à un système d'échange de chaleur pour la récupération de chaleur du liquide de lavage séparé des particules de salissures dans l'appareil séparateur (80), en particulier selon les besoins ou en continu.
  13. Lave-vaisselle (50) selon l'une quelconque des revendications précédentes,
    dans lequel le lave-vaisselle (50) est configuré comme un lave-vaisselle à convoyeur, dans lequel l'au moins un système de lavage (51, 52) est configuré comme l'au moins une zone de lavage, et dans lequel, en complément de l'au moins un système de lavage configuré comme une zone de lavage (51, 52), le lave-vaisselle à convoyeur comprend l'au moins une zone de rinçage ainsi qu'un dispositif convoyeur pour transporter les articles à laver à travers l'au moins un système de lavage (51, 52) configurée comme une zone de lavage et l'au moins une zone de rinçage qui est située en aval du système de lavage (51, 52) lorsqu'elle est vue dans la direction de transport des articles à laver ; ou
    dans lequel le lave-vaisselle (50) est configuré comme une automatisation de programme et comprend une chambre de traitement dans laquelle le système de lavage (51, 52) est configuré.
EP23185609.7A 2022-07-15 2023-07-14 Lave-vaisselle avec système d'évacuation des saletés Active EP4306030B1 (fr)

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DE102022117810.2A DE102022117810A1 (de) 2022-07-15 2022-07-15 Spülmaschine mit schmutzaustragsystem

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EP4306030A1 EP4306030A1 (fr) 2024-01-17
EP4306030B1 true EP4306030B1 (fr) 2025-10-22

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EP (1) EP4306030B1 (fr)
DE (1) DE102022117810A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005058250A1 (de) 2004-12-10 2006-07-06 Lg Electronics Inc. Geschirrspüler und Steuerungsverfahren dafür
DE102004062242A1 (de) * 2004-12-23 2006-07-13 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät und Verfahren zum Betreiben desselben
DE102005008987B3 (de) 2005-02-28 2006-06-01 Meiko Maschinenbau Gmbh & Co.Kg Mehrtankgeschirrspülmaschine mit Rückspülvorrichtung
EP2022385B1 (fr) * 2007-08-08 2011-05-25 Electrolux Home Products Corporation N.V. Lave-vaisselle
DE102011084917A1 (de) * 2011-10-20 2013-04-25 Premark Feg L.L.C. Spülmaschine mit mindestens einem als Rezirkulationskreislauf ausgebildeten Waschsystem
CN113940601A (zh) * 2021-10-14 2022-01-18 佛山市顺德区美的洗涤电器制造有限公司 洗碗机及其控制方法、装置及存储介质

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US20240016362A1 (en) 2024-01-18
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