EP2320785B1 - Geschirrspülmaschine in form eines programmautomaten und verfahren zu deren betrieb - Google Patents

Geschirrspülmaschine in form eines programmautomaten und verfahren zu deren betrieb Download PDF

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Publication number
EP2320785B1
EP2320785B1 EP09810453.2A EP09810453A EP2320785B1 EP 2320785 B1 EP2320785 B1 EP 2320785B1 EP 09810453 A EP09810453 A EP 09810453A EP 2320785 B1 EP2320785 B1 EP 2320785B1
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EP
European Patent Office
Prior art keywords
cleaning
basic
phase
fluid
rinsing
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Active
Application number
EP09810453.2A
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English (en)
French (fr)
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EP2320785A4 (de
EP2320785A1 (de
Inventor
Udo Buerkle
Dominik Schneider
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Premark FEG LLC
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Premark FEG LLC
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Publication of EP2320785A4 publication Critical patent/EP2320785A4/de
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    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047—Energy or water consumption, e.g. by saving 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0028—Washing phases
    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0026—Rinsing phases
    • 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
    • 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
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/023—Quantity or concentration of the consumable product
    • 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
    • A47L2401/03—Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
    • 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
    • A47L2501/04—Water pressure or flow rate
    • 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
    • A47L2501/06—Water heaters
    • 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
    • A47L2501/07—Consumable products, e.g. detergent, rinse aids or salt
    • 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
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Definitions

  • the invention relates to a method for the cleaning of washing stock and, in particular, to a commercial dishwasher which is designed in the form of a programmable machine.
  • the dishwasher includes a control arrangement, at which a program selection is performed by device of at least one, continuously adjustable parameter which is necessary for the wash process and is influenced through it.
  • the program selection consists preferably of partial program steps of "prewash”, “cleaning”, “intermediate wash”, “rinsing”, and “drying". At least one parameter is adjusted for each partial program step, according to the preselected adjustment at the control arrangement.
  • DE 196 51 347 A1 relates to a dishwasher operating method especially for household dishwasher.
  • the method preselects a program by device of at least one, continuously adjustable parameter which is necessary for a wash process and is influenced through it.
  • the program consists of partial program steps of prewash, cleaning, intermediate wash, rinsing, and drying.
  • the parameter is adjusted for each partial program step according to a preselected wash intensity.
  • the adjustable parameter is the duration of the individual partial program steps and the maximum temperature of the water.
  • DE 196 51 296 A1 relates to a dishwasher with control arrangement especially for household dishwasher.
  • the dishwasher includes a control arrangement, in which at least one parameter necessary for the washing process and influenced through it, is selectable in a predetermined range defined at least through maximum and minimum values.
  • the parameter is adjusted by the control arrangement within the preselected range limits, for the continuation of the wash process depending on at least one parameter recorded by each device of a sensor arrangement.
  • a predetermined range is selected at activation of the dishwasher without preselection of range.
  • DE 298 24 847 U1 relates to a method for the operation of a dishwasher with program control, in which the program steps are variable depending on the degree of opaqueness of the washing solution.
  • the cleaning effect is optimised with a minimum expenditure of time and energy in that a first program structure can be selected for easily cleaned domestic soiling and a second program structure can be selected for burned-on and/or dried-on domestic soiling, in that the degree of opaqueness of the washing solution is measured by means of an optical sensor according to transparency and foam formation, in that in the first program structure at least the washing duration is varied in the program steps and in that in the second program structure the washing solution is heated to a defined temperature, at least in pre-washing.
  • Dishwashers according to the invention are programmable machines. These may be basket push-through machines or front loaders, in particular under-counter machines. In hand-fed programmable machines, the washing stock, which is preferably received in a utensil basket, is manually introduced into and removed from the machine either via a front door or, in the case of basket push-through machines, via a counter delivery.
  • a particular type of commercial dishwashers in the form of programmable machines is hood-type machines.
  • Their treatment chamber for the cleaning of washing stock is surrounded by a hood.
  • the hood can be raised upwards in order to load the treatment chamber and can then be lowered again for the treatment of the washing stock.
  • Hood-type machines are provided, almost without exception, with a run-in table and a run-out table.
  • the two main process steps, the "cleaning phase” and the “rinsing phase”, take place successively in time, but not in a spatially separated way, in one zone (treatment chamber).
  • a tank is arranged, in which fluid sprayed in the treatment chamber can flow back by gravity.
  • a dishwasher designed as a programmable machine usually has a cleaning system with a pump, with a line system connected to the pump and with cleaning nozzles.
  • the fluid (cleaning fluid or detergent solution) contained in the tank arranged beneath the treatment chamber can be conveyed to the cleaning nozzles by the pump via the line system and be sprayed in the treatment chamber by the cleaning nozzles onto the washing stock or ware to be cleaned.
  • the sprayed cleaning fluid subsequently flows back into the tank arranged beneath the treatment chamber.
  • a commercial dishwasher designed as a programmable machine is normally equipped with two fluid systems which are independent of one another and are separated completely from one another.
  • One of these two fluid systems is a cleaning-fluid circuit, in which, for the purpose of cleaning the washing stock, a circulation of the cleaning fluid from the tank already mentioned is carried out.
  • the other fluid system is a rinsing-fluid system which may have a water heater for the heating of fresh water.
  • the main object of rinsing with rinsing fluid is to remove the cleaning fluid (lye) still located on the washing stock after the cleaning phase.
  • the rinsing fluid preferably used is therefore fresh water, to which a rinse aid can be added.
  • the rinsing fluid flowing off in to the tank during rinsing serves for regenerating the cleaning fluid received in the tank arranged beneath the treatment chamber, since the rinsing fluid (pure fresh water or fresh water mixed with rinse aid) sprayed in the treatment chamber during the rinsing phase flows by gravity in to the tank arranged beneath the treatment chamber. Before new rinsing fluid passes into the tank in this way during the rinsing phase in order to regenerate the cleaning fluid, the same quantity of cleaning fluid is pumped off from the tank.
  • a detergent or a detergent combination is added to the cleaning fluid which is sprayed in the treatment chamber during the cleaning phase.
  • the cleaning fluid contains a standard detergent, that is to say a detergent which, by virtue of its chemical composition, makes it easier to release food residues from the washing stock during the cleaning phase.
  • a standard detergent often has the capability of finely distributing and suspending food residues in the cleaning fluid (anti-redeposition capacity), with the result that a resoiling of the washing stock while the cleaning fluid is recirculating during the cleaning phase can be counteracted.
  • this type of soiling cannot be removed by means of a cleaning program carried out, as standard, by the dishwasher, and therefore, after a lengthy use of the washing stock, a cumulative build-up of residues on the surfaces of the washing stock cannot be avoided.
  • basic cleaning is to be understood as meaning an occasional or, if necessary, initial process of cleaning the washing stock, using suitable treatment agents (basic detergents), in which built-up coatings, in particular starch, protein or lime, are removed.
  • the washing stock to be treated is introduced in to an immersion basin which contains a basic cleaning fluid.
  • the basic cleaning fluid as a rule, has a high-dose treatment agent (basic detergent).
  • basic detergent high-dose treatment agent
  • the washing stock is cleaned manually.
  • the washing stock is rinsed off with fresh water, in order to rinse off residues of the basic detergent from the surface of the washing stock completely.
  • Manual basic cleaning is therefore labour-intensive and time-consuming manual work.
  • the invention is to achieve the object of providing a possibility whereby a saving of time and of cost can be achieved during the basic cleaning of washing stock.
  • the solution according to the invention is distinguished in that a dishwasher designed as a programmable machine is designed for executing different treatment programs, while, depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out, the treatment parameters of the cleaning phase and the treatment parameters of the rinsing phase are automatically set in adaptation to one another.
  • the solution according to the invention is thus distinguished, in particular, in that the treatment parameters of the cleaning phase and of the rinsing phase can be adapted optimally not only during standard cleaning, but also during a basic cleaning of the washing stock, in order to allow a treatment of the washing stock which is optimized in terms of a cleaning task.
  • the dishwasher according to the invention is designed such that it can not only execute mechanical standard cleaning, particularly for the removal of food residues, but, if required, also execute mechanical basic cleaning, in order to remove coatings, in particular starch, protein or lime, which have accumulated in the course of time.
  • the dishwasher according to the invention has a program control device, by means of which, depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out, the treatment parameters of the cleaning phase and the treatment parameters of the rinsing phase are automatically set in adaptation to one another. Since, in the solution according to the invention, the respective treatment parameters of the cleaning phase and rinsing phase are set in adaptation to one another, it is possible to coordinate optimally with one another the interaction at least of the factors which influence the cleaning result to the greatest extent.
  • the cleaning phase carried out by the programmable machine takes place according to a cleaning program adapted to the cleaning task, so that the temperature of the cleaning fluid, the contact time between the cleaning fluid and the washing stock and/or the nozzle pressure used during the spraying of the cleaning fluid can be optimized, and this can lead to savings of time and of cost.
  • the quantity of rinsing fluid sprayed overall during the rinsing phase is adapted to the demand actually required, and therefore, here too, fresh water and, if appropriate, energy can be saved.
  • the solution according to the invention is therefore also suitable, for example, for executing a mechanical basic cleaning of washing stock, an overtreatment of the washing stock during the cleaning and rinsing phase being effectively prevented, and therefore an optimal cleaning result being achievable, while at the same time there is a saving of time and of cost.
  • the solution according to the invention can be implemented in the form of a commercial programmable machine which is designed for executing a special basic-cleaning program for the basic cleaning of washing stock.
  • This basic-cleaning program may, for example, be stored in a memory of a program control device as an additional cleaning program, together with one or more standard-cleaning programs and be retrieved, as required, by the operator of the dishwasher.
  • the additional basic-cleaning program the parameters and program sequences which differ from a standard-cleaning program are fixed, in order to achieve the efficiency which is required for the removal of, for example, a cumulative starch build-up. After the use of this program, there can be a direct changeover again from the basic-cleaning program to a standard-cleaning program.
  • the dishwasher 100 illustrated as an example in Fig. 1 , contains a treatment chamber 2 for the cleaning of washing stock, not shown. Beneath the treatment chamber 2, a tank 4 is arranged, in which fluid can flow back from the cleaning chamber 2 by gravity. The tank 4 may be covered at the transition to the treatment chamber 2 with a screen, not illustrated in Fig. 1 .
  • the tank 4 contains cleaning fluid which is usually water, to which a detergent can be supplied either automatically by a detergent metering device, not illustrated explicitly in Fig. 1 , or manually.
  • the type, that is to say the chemical composition, and the quantity of the added detergent may be dependent on the type and/or the degree of soiling of the washing stock to be cleaned in the dishwasher 100.
  • a standard detergent optimized for this purpose is used, the chemical composition of which is adapted to the material of the washing stock (glass) and/or to the degree of soiling to be expected in this type of washing stock.
  • the cleaning fluid can be conveyed to cleaning nozzles 7 and 9 by a pump 8 via a line system 10 and be sprayed in the treatment chamber 2 through these cleaning nozzles 7, 9 on to the washing stock to be cleaned.
  • the sprayed cleaning fluid subsequently flows back in to the tank 4.
  • a discharge line 3 having an outflow pump 11 may be connected to the lower end 5 of the tank 4, in order, as required, to empty the tank 4 completely or partially.
  • a rinsing pump 12 is connected with its suction side to an outlet 35 of a water heater 20.
  • the water heater 20 has an inlet 22 connected to a fresh-water supply line 28.
  • the fresh-water supply line 28 can be connected to further fresh-water supply lines 24, 26 via a valve 27, so that either fresh water or fresh water with added rinse aid can be supplied to the water heater 20.
  • the water heater 20 has a heating arrangement 21, so that the fluid (pure fresh water or fresh water with added rinse aid) supplied via the inlet 22 can be heated up according to the stipulation of a process sequence.
  • the rinsing fluid selectively heated up or not heated up in the water heater 20 can be routed, for example during a rinsing phase, to rinsing nozzles 33 and 34 via a rinsing-line system 15.
  • the rinsing nozzles 33 and 34 are arranged in the treatment chamber 2, in order to spray the rinsing fluid heated in the water heater 20 on to the washing stock in the treatment chamber 2. It is, of course, also conceivable, however, that the water heater 20 is supplied via the inlet 22 and the fresh-water supply line 28 with pure fresh water to which a rinse aid is added only after heating in the water heater 20.
  • the solution according to the invention is not restricted to the presence of a water heater 20. Instead, within the scope of the invention, the provision of a water heater 20 may even be dispensed with, so that unheated rinsing fluid is conveyed to the rinsing nozzles 33 and 34 arranged in the treatment chamber 2 and is sprayed on to the washing stock.
  • the cleaning nozzles 7, 9 and the rinsing nozzles 33, 34 are in each case arranged preferably above and below the washing-stock region and are directed towards the washing-stock region of the treatment chamber 2.
  • an upper cleaning-nozzle system directed downwards and an upper rinsing-nozzle system formed separately from this and likewise directed downwards and also a lower cleaning-nozzle system directed upwards and a lower rinsing-nozzle system formed separately from this and likewise directed upwards are provided.
  • cleaning nozzles 7, 9 and/or the rinsing nozzles 33, 34 may be arranged only at the top or only at the bottom, instead of at the bottom and at the top, or, instead or additionally, may also be arranged on one side of the treatment chamber 2 and be directed in to the washing-stock region transversely to the treatment chamber 2.
  • the water heater 20 is connected to a suck-back preventer 16 via fresh water supply lines 24, 26, and 28.
  • the suck-back preventer 16 prevents the situation where fresh water may be sucked back from the suction side of the rinsing pump 12 in to a fresh-water supply line 17 connectable, for example via a valve 19, to a fresh-water network.
  • the suck-back preventer 16 may have an outlet 40 which is connected to a water softener device 39 via fresh-water supply lines 24 and 41.
  • the water softener device 39 may have, on the one hand, a salt container 42 connected to the fresh-water supply line 41 and, on the other hand, first and second water softeners 39a, 39b arranged parallel to one another.
  • the two water softeners 39a, 39b arranged parallel to one another may be connected to the outlet 40 of the suck-back preventer 16 via the fresh-water supply line 24 already mentioned.
  • water softeners 39a, 39b of the water softener device 39 can be operated alternately by means of the suitable activation of valves 43, in order to soften the fresh water supplied to the water heater 20 via the fresh-water supply lines 26 and 28.
  • the salt container 42 belonging to the water softener device 39 contains a suitable salt or a suitable chemical, by means of which, as required, a water softening agent added via the water softeners 39a and 39b or a decomposition product occurring during the addition of a water softening agent can be suitably regenerated.
  • the salt container 42 can be topped up with the salt or the chemical from the treatment chamber 2 via a port closable by means of a lid 44.
  • a program control device 50 for controlling at least one cleaning program is connected to the activatable components of the dishwasher 100, in order to carry out a cleaning program selected by the operator of the dishwasher 100.
  • the program control device 50 is connected , for example, to the valves 19 and 27, to the pump 8, to the rinsing pump 12 and/or to a heating control circuit for controlling the heating arrangement 21 of the water heater 20.
  • the program control device 50 is designed to implement a cleaning method (cleaning cycle) having the following steps (phases) to be executed in succession:
  • the solution according to the invention is distinguished in that the program control device 50 is designed, depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out, for automatically setting the treatment parameters of the cleaning phase and the treatment parameters of the rinsing phase in adaptation to one another.
  • the treatment parameters characteristic of the execution of various cleaning programs are stored in the program device 50 or in a memory device, not illustrated in Fig. 1 , to which the program control device 50 can have access.
  • the treatment parameters belonging to a cleaning program define the essential factors in the treatment of the washing stock during the cleaning phase and in the treatment of the washing stock during the rinsing phase.
  • the dishwasher 100 is designed not only for the mechanical execution of a cleaning program (standard-cleaning program) executable by a conventional programmable machine, but also for the mechanical execution, in particular, of a basic-cleaning program.
  • a cleaning program standard-cleaning program
  • the temperature of the cleaning fluid to be sprayed during the cleaning phase and/or the contact time between the cleaning fluid and the washing stock to be cleaned are coordinated with one another and predetermined.
  • the nozzle pressure used during the spraying of the cleaning fluid and the quantity of rinsing fluid sprayed during the rinsing phase are predetermined.
  • the term "stipulated cleaning task” includes here both a standard cleaning, which involves a mechanical standard cleaning of washing stock, that is to say the mechanical cleaning of washing stock according to a standard treatment program, and a mechanical basic cleaning, in which coatings accumulated in the course of time, in particular starch, protein and/or lime coatings, which cannot or cannot completely be eliminated during mechanical standard cleaning, are removed from the surface of the washing stock.
  • the treatment parameters for the cleaning phase of a basic-cleaning program which can be carried out mechanically by the dishwasher 100 differ from the treatment parameters of the cleaning phase of a standard-cleaning program, particularly with regard to the temperature of the cleaning fluid sprayed during the cleaning phase and/or with regard to the contact time between the cleaning fluid and the washing stock to be cleaned.
  • at least one of the two parameters, "temperature of the cleaning fluid" or "contact time between the cleaning fluid and the washing stock” assumes a higher value, as compared with the corresponding treatment parameter of a standard-cleaning program, in order thereby to achieve an efficient removal of, for example, a cumulative starch build-up.
  • the dishwasher 100 may have a tank heating arrangement, not illustrated in Fig. 1 .
  • the tank heating arrangement may be designed, for example, as a heating element which is arranged in the tank 4 in order to heat the cleaning fluid to be sprayed during the cleaning phase.
  • the tank heating arrangement can be activated by the program control device 50 in such a way that a stipulated temperature of the cleaning fluid is set automatically in accordance with the treatment parameters of a selected cleaning program and therefore depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out.
  • a heating device is provided, for example in the line system 10 between the pump 8 and the cleaning nozzles 7, 8.
  • the quantity of cleaning fluid recirculating during the cleaning phase can be set automatically in accordance with the treatment parameters of a selected cleaning program and therefore depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out. This may be implemented, for example, by means of an activation of the pump 8 which is carried out according to a program sequence.
  • a starch, protein and/or lime build-up on the surface of washing stock can be removed, in that, with the aid of the program control device 50, for example, the cleaning fluid recirculating during the cleaning phase is heated to a higher temperature, as compared with standard treatment and/or in that, for example, by a suitable activation of the pump 8, the contact time between the cleaning fluid and the surface of the washing stock (or the duration of the cleaning phase and the quantity of cleaning fluid circulated overall during the cleaning phase) is increased, as compared with standard treatment.
  • a basic cleaning of the washing stock is carried out by increasing the detergent concentration in the cleaning fluid.
  • the type and/or concentration of the detergent added to the cleaning fluid are selected as a function of the cleaning task and, in particular, depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out.
  • the detergent may in this case be added to the cleaning fluid either automatically with the aid of a detergent metering device, preferably activatable by the program control device 50, or manually.
  • the program control device 50 should be designed to set automatically, as a function of the concentration of a detergent added to the cleaning fluid, the quantity of rinsing fluid sprayed overall during the rinsing phase.
  • the program control device 50 to be connected, for example, to the rinsing pump 12 and to be designed, depending on whether a standard cleaning or a basic cleaning of the washing stock is to be carried out, for automatically setting the quantity of rinsing fluid sprayed overall during the rinsing phase, the quantity of rinsing fluid sprayed overall during the rinsing phase being increased automatically when a basic cleaning of the washing stock is carried out instead of a standard cleaning.
  • the concentration of a detergent added to the cleaning fluid is also increased.
  • the quantity of rinsing fluid sprayed overall during the rinsing phase is set by the program control device 50 as a function of the type of cleaning to be carried out, in order thereby to prevent an overtreatment of the washing stock during the rinsing phase and therefore an increased consumption of fresh water and, if appropriate, of energy which has to be expended in order to heat the rinsing fluid.
  • the rinsing fluid sprayed during the rinsing phase may be fresh water or fresh water mixed with rinse aid.
  • the task of the rinse aid is to relieve the surface tension of the fresh water used for rinsing and, by lowering the interfacial tension, to achieve an optimal wetting of the washing stock to be rinsed in the rinsing phase.
  • an, in particular, commercial dishwasher is specified, which is designed not only for mechanical standard cleaning, but also for mechanical basic cleaning of washing stock, while, depending on which cleaning task is selected by the operator of the dishwasher, treatment parameters optimally coordinated with one another are selected and set automatically for the cleaning and the rinsing phase.
  • At least one basic-cleaning program is stored, in addition to at least one standard-cleaning program, in the program control device 50.
  • the program parameters which differ from the program parameters of a standard-cleaning program are fixed, in order to achieve the efficiency which is required for the removal of, for example, a starch, protein and/or lime build-up.
  • this program there can be a direct changeover from the basic-cleaning program to a standard-cleaning program again.
  • the program control device 50 used in the solution according to the invention is preferably designed for implementing the following program sequence:
  • the basic-cleaning program is started from a standard operation of the dishwasher 100, then, first, part or all of the cleaning fluid (washing lye) is emptied out of the tank 4 and replaced with fresh water.
  • a suitable detergent is added to the fresh water.
  • the chemical used as detergent may be introduced manually or automatically, as a liquid or a powder, in to the fluid received in the tank 4, in order to raise the basic dosage of the fluid to a desired pH value.
  • the temperature of the cleaning fluid fresh water with added detergent
  • the quantity of cleaning fluid recirculating during the cleaning phase is set such that an optimal cleaning result is achieved and, nevertheless, the chemical consumption remains as low as possible.
  • the duration for which the washing stock is sprayed with cleaning fluid during the cleaning phase is adapted to the desired cleaning result, so that, for example, even in the case of washing stock with a high starch build-up, the desired cleaning result can be achieved.
  • the quantity of rinsing fluid introduced during the subsequent rinsing phase is previously pumped off from the tank 4, in order, after the rinsing phase, to have the starting quantity of cleaning fluid available again in the tank 4.
  • the washing stock is sprayed with an adapted quantity of rinsing fluid during the rinsing phase, in order to remove the cleaning fluid from the surface of the washing stock.
  • the end of the program sequence may be indicated by means of an optical or acoustic signal, and the washing stock may then be removed from the dishwasher 100.
  • the detergent concentration, reduced by pumping-off and rinsing, in the cleaning fluid is restored to the starting level.
  • the necessary fraction of the chemical used is introduced manually or automatically, as liquid or powder, in to the cleaning fluid.
  • the entire cleaning fluid is pumped off from the tank 4.
  • the tank 4 is subsequently refilled with fresh water, and a standard detergent is added again.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (14)

  1. Verfahren zum Reinigen von Spülgut in einer gewerblichen Geschirrspülmaschine (100), welche als Programmautomat ausgebildet ist, enthaltend die folgenden nacheinander auszuführenden programmgesteuerten Verfahrensschritte:
    a) eine Reinigungsphase, bei welcher eine Reinigungsflüssigkeit aus einem Tank (4) mittels einer Pumpe (8) durch ein Leitungssystem (10) in eine Behandlungskammer (2) gesprüht wird und von der Behandlungskammer (2) durch Schwerkraft in den Tank (4) zurückfließen kann;
    und b) eine Klarspülphase, bei welcher Frischwasser als Klarspülflüssigkeit mittels einer Klarspülpumpe (12) durch ein Klarspülleitungssystem (15) in die Behandlungskammer (2) gesprüht wird und von der Behandlungskammer (2) durch Schwerkraft in den Tank (4) fließen kann, wobei in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die Behandlungsparameter der Reinigungsphase und die Behandlungsparameter der Klarspülphase automatisch aufeinander angepasst eingestellt werden, und wobei mehrere nacheinander folgende Grundreinigungszyklen für die Grundreinigung von Spülgut durchgeführt werden, wobei jeder Grundreinigungszyklus eine Reinigungsphase und eine im Anschluss daran folgende Klarspülphase aufweist, und vor Beginn der Reinigungsphase des ersten Grundreinigungszyklus der Tank (4) mit einer im Vergleich zum Gesamtfassungsvermögen des Tanks (4) reduzierten Menge an Flüssigkeit gefüllt wird,
    dadurch gekennzeichnet, dass vor Beginn der Reinigungsphase eines jeden Grundreinigungszyklus eine an die in dem Tank (4) aufgenommene Flüssigkeitsmenge angepasste Menge an Grundreiniger derart zudosiert wird, dass während der Reinigungsphase eines jeden Grundreinigungszyklus die Grundreinigerkonzentration in der während der Reinigungsphase versprühten Reinigungsflüssigkeit konstant ist.
  2. Verfahren nach Anspruch 1, bei welchem die Reinigungsflüssigkeit Frischwasser mit zudosiertem Reiniger ist, dadurch gekennzeichnet, dass die Art des dem Frischwasser zudosierten Reinigers und/oder die Reinigerkonzentration in der Reinigungsflüssigkeit davon abhängt, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist.
  3. Verfahren nach Anspruch 1 oder 2, bei welchem während der Reinigungsphase erwärmte Reinigungsflüssigkeit versprüht wird, dadurch gekennzeichnet, dass in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die Temperatur der Reinigungsflüssigkeit automatisch eingestellt wird.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Temperatur der Reinigungsflüssigkeit automatisch erhöht wird, wenn anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die Einwirkzeit zwischen der Reinigungsflüssigkeit und dem zu reinigenden Spülgut automatisch eingestellt wird.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Einwirkzeit zwischen der Reinigungsflüssigkeit und dem zu reinigenden Spülgut automatisch erhöht wird, wenn anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird.
  7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, der beim Versprühen der Reinigungsflüssigkeit während der Reinigungsphase verwendete Düsendruck automatisch eingestellt wird.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass der beim Versprühen der Reinigungsflüssigkeit während der Reinigungsphase verwendete Düsendruck automatisch erhöht wird, wenn anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird.
  9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die während der Klarspülphase insgesamt verspritzte Menge an Klarspülflüssigkeit automatisch eingestellt wird; wobei die während der Klarspülphase insgesamt verspritzte Menge an Klarspülflüssigkeit automatisch erhöht wird, wenn anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird.
  10. Gewerbliche Geschirrspülmaschine (100), in Form eines Programmautomaten, welche Folgendes aufweist:
    - eine Programmsteuereinrichtung (50) zur Ausführung von einem ausgewählten Reinigungsprogramm;
    - eine Behandlungskammer (2), in welche Spülgut manuell einsetzbar und herausnehmbar ist;
    - einen Tank (4), in welchen Flüssigkeit aus der Behandlungskammer (2) durch Schwerkraft fließen kann;
    - ein Reinigungssystem (7, 8, 9, 10) mit einer Pumpe (8) und einem Leitungssystem (10) zum Fördern von Reinigungsflüssigkeit während einer Reinigungsphase aus dem Tank (4) durch Reinigungsdüsen (7, 9) in die Behandlungskammer (2); und
    - ein Klarspülsystem (12, 15, 33, 34) mit einer Klarspülpumpe (12) und einem Klarspülleitungssystem (15) zum Fördern von Klarspülflüssigkeit während einer Klarspülphase durch Klarspüldüsen (33, 34) in die Behandlungskammer (2),
    wobei die Programmsteuereinrichtung (50) ausgelegt ist, in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die Behandlungsparameter der Reinigungsphase und die Behandlungsparameter der Klarspülphase automatisch aufeinander angepasst einzustellen, und
    wobei die Programmsteuereinrichtung (50) ausgelegt ist, mehrere nacheinander folgende Grundreinigungszyklen für die Grundreinigung von Spülgut durchzuführen, wobei jeder Grundreinigungszyklus eine Reinigungsphase und eine im Anschluss daran folgende Klarspülphase aufweist, und vor Beginn der Reinigungsphase des ersten Grundreinigungszyklus der Tank (4) mit einer im Vergleich zum Gesamtfassungsvermögen des Tanks (4) reduzierten Menge an Flüssigkeit gefüllt wird,
    dadurch gekennzeichnet, dass vor Beginn der Reinigungsphase eines jeden Grundreinigungszyklus eine an die in dem Tank (4) aufgenommene Flüssigkeitsmenge angepasste Menge an Grundreiniger derart zudosiert wird, dass während der Reinigungsphase eines jeden Grundreinigungszyklus die Grundreinigerkonzentration in der während der Reinigungsphase versprühten Reinigungsflüssigkeit konstant ist.
  11. Geschirrspülmaschine (100) nach Anspruch 10, bei welcher ferner eine Heizung zum Erwärmen der während der Reinigungsphase zu versprühenden Reinigungsflüssigkeit vorgesehen ist, dadurch gekennzeichnet, dass die Heizung von der Programmsteuereinrichtung (50) derart ansteuerbar ist, dass in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, eine Temperatur der Reinigungsflüssigkeit automatisch eingestellt wird.
  12. Geschirrspülmaschine (100) nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass die Programmsteuereinrichtung (50) ausgelegt ist, in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, den beim Versprühen der Reinigungsflüssigkeit während der Reinigungsphase verwendeten Düsendruck automatisch einzustellen.
  13. Geschirrspülmaschine (100) nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass die Programmsteuereinrichtung (50) ausgelegt ist, in Abhängigkeit davon, ob eine Standardreinigung oder eine Grundreinigung des Spülguts durchzuführen ist, die während der Klarspülphase insgesamt verspritzte Menge an Klarspülflüssigkeit automatisch einzustellen.
  14. Geschirrspülmaschine (100) nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, dass die Programmsteuereinrichtung (50) ausgelegt ist, die Menge der während der Klarspülphase insgesamt verspritzten Klarspülflüssigkeit automatisch zu erhöhen, wenn von der Geschirrspülmaschine (100) anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird; und/oder dass die Programmsteuereinrichtung (50) ausgelegt ist, die Temperatur der während der Reinigungsphase rezirkulierenden Reinigungsflüssigkeit automatisch zu erhöhen, wenn von der Geschirrspülmaschine (100) anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird; und/oder dass die Programmsteuereinrichtung (50) ausgelegt ist, den beim Versprühen der Reinigungsflüssigkeit während der Reinigungsphase verwendeten Düsendruck automatisch zu erhöhen, wenn von der Geschirrspülmaschine (100) anstelle einer Standardreinigung eine Grundreinigung des Spülguts durchgeführt wird.
EP09810453.2A 2008-08-29 2009-08-18 Geschirrspülmaschine in form eines programmautomaten und verfahren zu deren betrieb Active EP2320785B1 (de)

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DE102008044952A DE102008044952A1 (de) 2008-08-29 2008-08-29 Spülmaschine in Form eines Programmautomaten und Verfahren zu deren Betrieb
PCT/US2009/054109 WO2010025051A1 (en) 2008-08-29 2009-08-18 Dishwasher in the form of a programmable machine and method for operating it

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EP2320785A4 EP2320785A4 (de) 2014-04-23
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EP2320785A4 (de) 2014-04-23
WO2010025051A1 (en) 2010-03-04
CN102137613A (zh) 2011-07-27
US20110132403A1 (en) 2011-06-09
AU2009285959B2 (en) 2013-11-07
DE102008044952A1 (de) 2010-03-04
WO2010025051A8 (en) 2010-09-16
CN106235979A (zh) 2016-12-21
EP2320785A1 (de) 2011-05-18
CA2732811A1 (en) 2010-03-04

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