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WO2001014625A2 - Procede de lavage et lave-vaisselle - Google Patents

Procede de lavage et lave-vaisselle Download PDF

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Publication number
WO2001014625A2
WO2001014625A2 PCT/EP2000/008030 EP0008030W WO0114625A2 WO 2001014625 A2 WO2001014625 A2 WO 2001014625A2 EP 0008030 W EP0008030 W EP 0008030W WO 0114625 A2 WO0114625 A2 WO 0114625A2
Authority
WO
WIPO (PCT)
Prior art keywords
rinsing
agent
liquid
washing
zone
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.)
Ceased
Application number
PCT/EP2000/008030
Other languages
German (de)
English (en)
Other versions
WO2001014625A3 (fr
Inventor
Michael Werz
Gerold Carlhoff
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.)
Ecolab GmbH and Co OHG
Original Assignee
Henkel Ecolab GmbH and Co KG
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 Henkel Ecolab GmbH and Co KG filed Critical Henkel Ecolab GmbH and Co KG
Priority to AU74100/00A priority Critical patent/AU7410000A/en
Publication of WO2001014625A2 publication Critical patent/WO2001014625A2/fr
Publication of WO2001014625A3 publication Critical patent/WO2001014625A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • 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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the invention relates to a washing method and a dishwasher.
  • wash ware accumulates with very different soiling; Cooking and baking utensils, on the one hand, and glasses, on the other hand, have other soiling (types, starches).
  • Commercial dishwashers tailored to the specific types of soiling and degrees of soiling are available for the different items and are operated using different cleaning methods.
  • the main influencing factors for the cleaning performance are the type and concentration of the cleaning agents used, the temperature of the cleaning agent, mechanical factors such as washing pressure or circulation rate, and the duration of the cleaning.
  • the cleaning result could be extended by Contact time of the detergent / cleaning agent with the wash ware can be improved, since an extension is proportional to a reduction in the deposits and the contamination.
  • long program runtimes are not acceptable for economic reasons; a maximum of 7 minutes is assumed.
  • utensil dishwashers In addition to the standard dishwashers with various washing programs for glasses, plates, cups or cutlery, so-called “utensil dishwashers” are used, with which extremely stubborn dirt such as on cooking or baking utensils can be removed.
  • the object of the invention is therefore to provide a simple and economical washing method in which dirty dishes are cleaned and treated in accordance with individual requirements.
  • the dishwasher according to the invention has a spray device to which containers for separate storage of a first and a second agent are directly assigned.
  • rinsing process is also understood to mean removal of residues by mechanical and chemical action, such as cleaning, rinsing, or other special treatment.
  • either the same or different agents are applied to the dirty items to be washed in one or more washing steps or zones (washing steps) by means of a common spraying device.
  • This has the advantage that, compared to conventional rinsing processes, there is greater flexibility with regard to the process management.
  • one process step such as pre-rinsing, main rinsing, rinsing, rinsing, advantageous properties of two agents are used in a targeted manner without the rinsing process being complex. It is easy because the outlay on equipment is low.
  • the agents it is possible to apply the agents to the items to be cleaned at the same time in one rinsing step, so that several active substances can be combined with one another, for example pre-treatment and post-treatment agents, both of which need not be chemically compatible with one another, in particular cleaners with decalcifiers, cleaners with Bleach, rinse aid with disinfectant or bleach with starch loosener.
  • pre-treatment and post-treatment agents both of which need not be chemically compatible with one another, in particular cleaners with decalcifiers, cleaners with Bleach, rinse aid with disinfectant or bleach with starch loosener.
  • a medium one Concentration can be adjusted.
  • the agents can also be applied to the items to be washed in successive rinsing steps using the same spray device. This procedure is preferably used in rinsing processes that allow a choice between rinsing programs with one or multi-stage cleaning.
  • the device according to the invention makes it possible to produce an agent in situ shortly before application, which has a higher stability than agents that are already stored as a ready-made solution.
  • At least one normally concentrated rinsing liquid with a concentration of 0.01 to 6.0 g / l of cleaning-active substance, in particular 0.05 to 3.0 g / l, and a highly concentrated rinsing liquid (hereinafter rinsing concentrate) with a concentration of 0 are advantageous , 1 to 500 g / l of cleaning-active substance, in particular 0.5 to 100 g / l.
  • a normally concentrated liquid or concentrate is preferably used with the following target concentrations: alkaline cleaner from 0.1 to 6.0 g / l or from 6.0 to 500 g / l, enzymatic cleaner from 0.01 to 0.5 g / l or from 0.5 to 150 g / l, acidic decalcifying agents from 0.1 to 6.0 g / l or from 6.0 to 500 g / l or / and bleaching agents from 0.01 to 1.0 g / l or from 1.0 to 300 g / l Some of these substances are mixed together or contained in other agents.
  • both the normally concentrated rinsing liquid and the rinsing concentrate are then sprayed into the washing area via a common washing system with a spray device on the outlet side.
  • the amount of liquid introduced is only time-dependent, since the nozzles of the spray devices deliver a constant volume per unit of time. Consumption occurs both during the individual washing program and during an operating cycle consisting of a plurality of washing programs running in succession, so that a corresponding amount is expediently topped up.
  • active substance is also consumed, especially when using differently concentrated liquids, part of the highly concentrated agent is carried off into the normally concentrated agent because both agents are introduced into the wash cabinet via a common washing system. As a result, the target concentrations are fallen short of or exceeded.
  • concentration in the first mean during the operating cycle In order to lower the concentration or keep it constant, it is advisable to add a third agent, such as water or part of a rinse aid.
  • the dishwasher has a washing system with a common spray device for the separately stored agents.
  • a spray device such as spray bows, spray arms or the like
  • the dishwasher it is achieved that a single dishwasher can be operated with different washing programs, with different means being stored at the same time.
  • Several means are stored in one operating cycle, so that no retrofitting of the dishwasher is required and several identical or different washing programs can be carried out in succession without loss of time.
  • This has the advantage that dishwashing programs can be run in the dishwasher with a special cut to the requirements of the different types and degrees of soiling.
  • a dishwasher with the features of the invention can be used universally; in particular, because of the large number of washing programs with very short throughput times, it is suitable for use as a commercial dishwasher.
  • the integration of several types of dishwashers in one housing means that there is no need to purchase several dishwashers, which means that there are no acquisition costs and lower operating costs.
  • the machine savings advantageously involve less installation effort and a smaller space requirement.
  • At least one fitting such as a valve, slide or flap, in the discharge from the washing area or the washing zone for returning the agents either to one or the other Containers arranged so as to enable the agent to be returned to a circulatory system.
  • This helps to save at least the same cleaning performance of products such as cleaners, cleaning boosters or the like, and, if necessary, water. This has a positive impact on operating costs.
  • the dishwasher works according to an environmentally friendly method, because less environmentally harmful substances are released into the wastewater and the resources are conserved.
  • the capacity of the containers is expediently smaller than the volume of a wash tank in commercially available dishwashers, since fewer means are used because of the inventive washing method, in particular when the latter is recycled.
  • the circulation capacity of the pump must also be selected such that the return is not too low.
  • the containers preferably have at least the volume of the washing system and an amount to be sprayed in order to prevent the circulation pump from running dry.
  • the small container size has a positive effect on the space required within the housing, even with an external arrangement.
  • sensors are arranged in the containers, preferably the fill level is measured by means of a conductivity electrode arranged in the range of the target value.
  • the concentrations in the containers are also measured with the aid of a sensor, so that, depending on the measurement result, the rinsing liquid is replenished via a metering unit assigned to the container.
  • Fig. 1 is a dishwasher with a spray device and two separate
  • Containers for a first and second means Fig. 2 a dishwasher with a spray device and two separate
  • FIG. 3 is a schematic flow diagram of a washing process in a dishwasher according. 1
  • Fig. 4 is a schematic flow diagram of a washing method in a dishwasher according to. Fig. 2.
  • 1 and 2 show two different exemplary embodiments of a commercial dishwasher (1) for carrying out a rinsing process of items to be cleaned (2) which can be varied depending on the type and degree of soiling.
  • 1 is a cross section through a rinsing zone (3) in a belt-conveying dishwasher (1), rinsing zones, such as pre-rinsing, main rinsing, rinsing, main rinsing or rinsing, being provided one after the other in the conveying direction (not shown).
  • FIG. 2 shows a cross section through a washing compartment (3) in a single-chamber dishwasher (1) with a discontinuous cleaning, wherein in the washing compartment (3), according to the selected washing program, different rinsing cycles in succession, such as pre-rinsing, main rinsing, rinsing, main rinsing or Rinse off.
  • Program-controlled dishwashers can be used in the catering industry for the continuous or discontinuous cleaning of the dishes, whereby under this term “dishes” all items to be cleaned in a dishwasher, in particular both heavily soiled cooking and baking utensils and less soiled dishes, such as glasses, plates, cutlery or cups.
  • the dishwashers (1) shown in FIGS. 1 and 2 have a washing area or a washing zone (3) in which a spray device (9) consisting of one below and one above a removable crockery basket or conveyor belt (4) is arranged , rotatable spray arm (5) with nozzles (6) for introducing a first (7) and a second (8) means into the washing compartment or the washing zone (3).
  • the first spraying device (9) is assigned two containers (13, 14) for the first (7) and second (8) means directly in terms of line, without the interposition of further containers or devices.
  • the containers (13, 14) are integrated into a pipe system (12) as part of a washing system via a feed line (11).
  • Each container (13, 14) has a drain so that after the end of an operating cycle (100) the used liquids (7, 8, 20) can be removed from the dishwasher (1) and replaced with new, unused washing liquid (7, 8).
  • the dishwasher (1) according to FIG. 2 has a further piping system (19) with its own spray device (10), such as a rinse system known from commercial dishwashers. Therefore, in addition to the first spray device (9), a second rotatable or fixed spray device (10) is provided in the wash chamber (3) or wash zone for the application of a third means (20), which is connected in line with the washing system with the first spray device (9). is separated and connected to the second piping system (19).
  • a rinse aid system (19) usually has a boiler with heating in order to heat the rinse aid liquid.
  • a second pipe system with its own spray device can also be used for the targeted introduction of special cleaners, disinfectants, decalcifying agents, softeners or mixtures into a rinse cycle or zone.
  • the first (7) and second (8) agents in the dishwashers (1) shown are washing liquids preferably containing cleaning-active substances of different concentrations in the associated containers (13, 14) and applied with the aid of the first spray device (9), the first Flushing liquid (7) is normally concentrated and the second flushing liquid (8) is highly concentrated.
  • the container volume of the container (13) for the first rinsing liquid (7) or the mixture is approximately 15 l and the container (14) for the second rinsing liquid (8) is approximately 6 l, the volume of the concentrate container is smaller, since less means are required to achieve a comparable cleaning performance.
  • the minimum volume takes up the sum of the volume of the washing system and a transfer volume that corresponds to the volume of liquid introduced into the spray chamber (3), so that the pump (s) (15) run dry prevent.
  • a rinse aid is used as the third means (20), which is sprayed into the washing compartment (3) by means of a second spray device (10). Detergent and / or detergent residues adhering to the cleaned items (2) are removed with the rinse aid liquid (20). Hot fresh water with a temperature of at least 60 ° C., preferably about 85 ° C., is used as the rinse aid liquid (20) in order to promote drying of the items to be washed (2) before / upon removal after the end of a washing program.
  • the rinsing liquid (20) is not circulated in a separate closed circuit by being returned to a separate storage container, but is instead discharged via the drain (17) of the washing chamber (3). fed into the circuit of the first rinsing liquid (7) and diluted this.
  • FIGS. 1 and 2 With a one-pump system acc. Fig. 1 is arranged in the piping system (12) of the washing system of the first spray device (9) only one circulation pump (15).
  • the rinsing zone (3) has a drain (17) for the excess amount of liquid introduced into the rinsing zone (3), the liquids are not circulated in a closed circuit, but are either used in another rinsing zone or are disposed of.
  • constructive adaptation of the dishwasher for a circular operation is easily possible by providing a branched discharge from the washing zone into the container with a fitting assigned to the spray device.
  • a separate dosing unit (22) and possibly a filling unit are assigned to each container (13, 14).
  • a two-pump system and a two-circuit system for conveying the liquids in a separate, closed circuit is shown, for which purpose in the piping system (12) each have a circulation pump (15) on the outlet side in a discharge from the container (13:14), is arranged before their union.
  • the bottom (16) of the washing compartment (2) has a drain (17) with a branched return section to the different containers (13, 14), a fitting (18) arranged in the return outlet being in the form of a valve, a flap, a slide or the like.
  • the base (16) preferably has the shape of a trough or a funnel with a drain (17) arranged at the lowest point.
  • the circulation pumps (15) are switched in such a way that only one of the circulation pumps (15) is always in operation in order to dispense the first washing liquid (7) or a mixture of the first washing liquid (7) and the rinse aid liquid ( 20) or to convey the second rinsing liquid (8) in the circuit from the containers (13, 14) (9) directly assigned to the first spray device (9).
  • the circulated liquids are the corresponding containers (13, 14) and temporarily stored for later use.
  • An overflow system (21) is arranged in the container (13) for receiving the first rinsing liquid (7) and the rinse liquid (20), so that a maximum of the rinse liquid (20) in the container (13) even when it returns (20R) Level is not exceeded.
  • the level in the containers (13, 14) is determined with the aid of a sensor, in particular a conductivity measuring electrode, which is arranged in the range of the predetermined target level.
  • the conductivity measuring electrode has the task of determining the concentration of the circulated liquids and, if necessary, arranging for further dosing, either by means of a separate metering unit (22) assigned to the respective container (13, 14) or in the case of the first rinsing liquid (7 ) a targeted introduction of the second rinsing liquid as rinsing concentrate (8) is carried out via the washing system.
  • FIG. 3 shows a washing method for a continuously operated dishwasher with a washing system consisting of two containers (13, 14) connected upstream of a first spraying device and a rinse aid system (19), the dirty dishes (2) being conveyed through the dishwasher by means of a conveyor belt for cleaning ,
  • the machine manufacturer specifies various washing programs (120), in which the items to be washed (2) are even used in different rinsing zones / rinsing steps or in individual process steps, such as pre-rinsing (101), main rinsing (102), rinsing (103) or rinsing (104) is not treated once or repeatedly.
  • the control (120) is carried out by the washing program (105, 106) selected before a batch is put into the dishwasher (1), ie each batch runs individually through the selected washing program (105, 106), with in the dishwasher (1) simultaneously run several washing programs (120) in parallel.
  • the first agent (7) preferably a first washing liquid in normal concentration
  • the second agent (8) preferably a washing liquid in higher concentration than Rinse concentrate
  • a common spray device 9
  • a third agent (20) preferably a rinse aid liquid
  • the excess agent (7, 8, 20) applied is removed from the rinsing zone (3) via a discharge line (17).
  • the containers (13, 14) are filled (90) for the first time, so that several washing programs (120) can be run through in one operating cycle (100) without refilling the containers (13, 14).
  • Sensors arranged in the containers (13, 14) for measuring the fill level are operatively connected to a switch which signals the end of an operating cycle (100). Refilling can also be carried out during operation or the flushing process is interrupted in order to refill (90). If the means (7,8) are to be exchanged, the remaining amount can be drained from the corresponding containers (13, 14) via the drains (23, 24).
  • washing program 105 with a one-step cleaning
  • another washing program (106) with a multi-step cleaning After the selection (120) of the washing program (106) with a multi-stage cleaning, the batch of items to be washed (2) is in the first washing zone, first with a normally concentrated washing liquid (7) in a pre-washing step (101), then with one concentrated rinsing liquid (8) in a main rinsing step (102) and again with the normally concentrated rinsing liquid (7) in a rinsing Treated step (103), the agents are introduced into the rinsing zone with the same volume via the same spray device.
  • a washing program (105) with a one-step cleaning
  • another washing program (106) with a multi-step cleaning After the selection (120) of the washing program (106) with a multi-stage cleaning, the batch of items to be washed (2) is in the first washing zone, first with a normally concentrated washing liquid (7) in a pre-washing step (101), then with one concentrated rinsing liquid
  • the batch of wash ware (2) is selected (120) of the wash program (105) with one-step cleaning in the first washing zone only in a process step corresponding to pre-washing (101) with the normally concentrated washing liquid.
  • the wash items freed from dirt are finally treated with the rinse aid liquid (20) in a rinse step (104); beforehand, the conveyor belt conveys the wash items (2) into a next washing zone with a separate spray device. If the selection of the washing program has been made, only individual parameters such as the duration of the individual process steps can be freely selected within a washing program (105, 106).
  • the rinsing process shown in Fig. 3 also allows the use of rinsing liquids conveyed in the circuit in the rinsing program (105) with one-stage cleaning and the rinsing program (106) with multi-stage cleaning, but only one of the two circuits is in the first rinsing zone closed by the rinsing liquids (7,8) while the other circuit is interrupted.
  • two agents could also be applied to the items to be washed simultaneously or in succession, such as an agent containing a special cleaner.
  • Other chemically compatible combinations of agents are cleaners with softeners, cleaners with bleach, bleach with starch solvents or cleaners with acidic neutralizers.
  • FIG. 4 shows a commercial rinsing method for a discontinuously operated single-chamber dishwasher with a first spray device for the rinsing liquids and a second spray device for a rinse liquid.
  • the machine manufacturer provides a selection of special rinse programs (105, 106) tailored to the commercial sector, with individual program steps / rinse cycles, such as pre-rinse (101), main rinse (102), rinse (103) and rinse (104) individually according to the needs of the User can be combined with each other and a corresponding programming can be carried out.
  • the dirty items to be washed (2) are placed in one or more crockery baskets in a closable washing area of the dishwasher.
  • An operating cycle (100) is composed of the duration of successive program runs of washing programs (120), the dishwasher (1) being operated with identical or different washing programs.
  • the rinsing liquids (7,8) are not exchanged, but circulated in a closed circuit system.
  • a normally concentrated washing liquid as the first agent (7) and / or a highly concentrated washing liquid (washing concentrate) as the second agent (8) is applied to the items to be washed (2) via the first spray device during the runs brought the washroom.
  • the excess rinsing liquid (7) or rinsing concentrate (8) is returned to the circuit as a return (7R, 8R).
  • the previously applied rinsing liquid (7, 8) drips from the items to be washed (2), the devices in the wash cabinet and the walls of the wash cabinet, collects on the bottom side and flows through a drain with one between the containers - And forth switchable fitting in the associated container (13, 14) back.
  • the wash liquid (7, 8) used is conveyed in a separate circuit, the other wash liquid (7, 8) being simultaneously stored for later use in the container (13, 14) assigned to the spraying device.
  • both rinsing liquids (7, 8) are applied in succession via the first spraying device which is directly assigned to the containers (13, 14), for which purpose one of the two circuits is closed while the other is interrupted.
  • both wash programs (105, 106) the cleaned wash ware - 16 -
  • the cleaned items (2) are wetted with the rinse liquid (20) sprayed by the second spray device as a third agent.
  • wash program (120) for lightly soiled dishes (2) such as a glass program (105)
  • cleaning is only one step, i.e. Only normally concentrated rinsing liquid (7) is used during cleaning.
  • the cleaning time is between 60 to 120 seconds, after which the clean dishes (2) are rinsed with preferably demineralized fresh water (20) from the rinse aid system (19).
  • demineralized fresh water (20) from the rinse aid system (19) An improved cleaning result is achieved by using demineralized water in the glass program (105).
  • a quantity of 3.5 l is sprayed during rinsing (104).
  • wash programs (120) such as a cutlery, plate, cup or utensil program (106), which are matched to the washware (2) to be cleaned.
  • All of the above-mentioned washing programs (106) have a cleaning in several steps, in which the normally concentrated washing liquid (7) and the washing concentrate (8) are applied to the soiled items (2) one after the other.
  • a dishwasher is equipped with more than two containers, both liquids of different concentrations and agents or mixtures containing different active substances can be used in the washing process.
  • the rinsing process can be supplemented by special process steps such as descaling, softening, disinfecting, bleaching.
  • these agents, together with the agents or rinse aids containing cleaning-active substances could be introduced into the wash cabinet via the first spray device, without the need for a second spray device.
  • the procedure during a washing program depends on the type of soiling and the degree of soiling, so the duration of the pre-rinse, main rinse, rinse and rinse step varies as well as individual Properties of the rinsing liquids (7,8) in the form of type, temperature or also the amount of rinsing liquid (7,8) entered in the washing compartment (3).
  • the procedure for the cutlery program (106) is as follows: pre-rinsing (101) with normally concentrated rinsing liquid (7) for 30 to 60 seconds, main rinsing (102) with rinsing concentrate (8) for 30 to 180 seconds, rinsing (103 ) with normal concentrated rinsing liquid (7) for 15 to 30 seconds. and final rinsing (104) with hot fresh water (20) at a temperature of approximately 85 ° C. as rinsing liquid (20) for 7 to 10 seconds.
  • the duration of the individual Rinse cycles are comparatively longer because of the heavier soiling, namely up to 120 seconds. during pre-rinsing (101), up to 300 sec. main wash (102) and up to 60 sec.
  • the utensil program (106) is characterized by comparatively long washing cycles due to the strongly adhering dirt on the utensils, so the main wash (102) can last for up to 600 seconds. take in.
  • the main wash cycle (102) regularly consists of different, repeating phases, with wash concentrate (8) wetting the surface of the wash ware (2) and then acting on the soiling, so that the soiling is loosened in order to be more easily rinsed off in the rinse cycle (103) become.
  • the amount of rinse aid liquid (20) introduced in the rinse aid (104) is also changed in the different rinse programs (120) and thereby increased by up to 8 liters.
  • the duration of a cycle of a washing program (120) in a commercial dishwasher is significantly lower than that in a dishwasher used in households. For economic reasons, the throughput times are as short as possible in order to shorten the distance between successive uses of the dishes.
  • the washing system is filled (90) with the normally concentrated rinsing liquid (7) and / or the rinsing concentrate (8) because the liquids (7,8) are not changed during the operating cycles (100).
  • the end of an operating cycle (100) is defined by a predetermined number of program runs. This value is either specified by the machine manufacturer or a value determined by the user
  • Operating cycle (100) could also be variable, especially if the value is determined by a point evaluation. With such an evaluation everyone is
  • the maximum value for the rinsing liquids is set differently.
  • the value for the normally concentrated rinsing liquid (7) is preferably lower than for the rinsing concentrate (8), for example it is one third. Regardless of the programming, the
  • a new filling (90) of the washing system can be made.
  • Filling (90) the dishwasher with rinsing liquid (7) or rinsing concentrate (8) proceeds as follows: First, the first container (13) with normally concentrated rinsing liquid (7) is filled with fresh water via the rinse aid system (20), the water heated in batches in the boiler and cleaning-active substance (s) is added via a metering unit. When filling (90) this first container (13), the connection to the second container (14), the concentrate container (14), is interrupted by the fitting (18). The second container (14) is filled separately, for which purpose the second container (14) is assigned its own filling unit with metering unit.
  • the active substance of the first container is filled and dosed via the washing system with the associated second container with dosing unit.
  • the cleaning active substance is liquid, pasty, powdery or solid, any application form can be used.
  • the concentration of the rinsing liquid (7) or the rinsing concentrate (8) is measured in the container (13, 14) by means of a sensor, preferably a conductivity measuring electrode, the result of the measurement being used to regulate the Concentration and / or fill level in the containers (13, 14) is used.
  • the normally concentrated rinsing liquid After filling (90), i.e. at the beginning of an operating cycle (100), for example when cleaning with an alkaline cleaner, the normally concentrated rinsing liquid has a target concentration of approx. 1 g cleaning-active substance / I and the rinsing concentrate of approx. 30 g / l cleaning-active substance / I.
  • acidic cleaners with preferably a normal concentration of 1 to 3 g / l and a concentrate preferably from 20 to 80 g / l
  • enzymatic cleaners with a normal concentration preferably from 0.1 to 0.5 g / l and a concentrate of 1.0 to 5.0 g / l
  • a bleaching agent of a normal concentration of preferably 0.1 to 1.0 g / l and 1.0 to 10 g / l or mixtures containing these agents are particularly useful in the acidic cleaners with preferably a normal concentration of 1 to 3 g / l and a concentrate preferably from 20 to 80 g / l
  • enzymatic cleaners with a normal concentration preferably from 0.1 to 0.5 g / l and a concentrate of 1.0 to 5.0 g / l
  • a carryover of the cleaning-active substance during the program runs leads to a lowering of the target concentration in the rinsing concentrate (8) and an increase in the target concentration in the normally concentrated rinsing liquid (7), so that a replenishment (110) is required during the operating cycle (100) is.
  • the respective target concentration is approximately maintained by replenishing (110) the cleaning substance or fresh water. Volume losses can also be compensated for by adding liquid.
  • the items to be washed (2) are pretreated under conventional conditions with a normally concentrated washing liquid (7) at normal temperature in order to remove the coarse dirt and to wet the surface of the items to be washed (2) almost completely ,
  • the rinsing liquid (7) is removed from the first rinsing liquid container (13) and applied via the first spray device.
  • the excess amount applied flows back as a return (7R) via the drain between the containers (13, 14) and the wash cabinet with an integrated fitting into the closed wash liquid circuit, namely into the first container (13).
  • the active cleaning substance from previous program runs causes an increase in the concentration of the washing liquid (7) in the first container (13), which may be caused by a clear rinse (110) Fresh water (20) is lowered.
  • the discharge into the second container (14) is released and the next rinse cycle is initiated, i.e. the previously closed rinsing liquid circuit is interrupted and the previously open rinsing concentrate circuit is closed.
  • wash concentrate (8) is sprayed onto the pre-cleaned wash ware (2), which then acts on the soiling. Repeating the treatment additionally supports the dissolving process of the soiling.
  • Rinsing concentrate (8) is removed from the second container (concentrate container) (14) with the circulation pump which promotes circulation in the pre-rinsing cycle and the items to be washed (2) are wetted over the entire surface.
  • the excess amount (8R) flows back into the second container (14) via the closed rinse concentrate circuit, the concentration regularly decreasing, since cleaning-active substance adheres to the surfaces and is thus carried over.
  • the next rinse cycle is initiated by switching the valve again.
  • the items to be washed (2) which are subjected to intensive cleaning, are treated again in a post-cleaning step (rinse cycle) (103) with the normally concentrated washing liquid (7) under conventional conditions as in 1.) in order to remove the loosened soiling and the concentration on the surface the items to be washed (2) to prepare the rinse cycle.
  • rinse cycle (103) ends, the circulation of rinsing liquid (7,8) in the washing system (12) is stopped.
  • rinsing (104) As in conventional methods, between 4 to 8 liters of fresh water at about 82 ° C. are brought to the cleaned items (2) as rinsing liquid (20). Excess rinse liquid (20) runs through the open drain from the wash cabinet into the first container (13) and dilutes the rinse liquid (7) stored there for the next program run. When the capacity of the container (13) is exceeded, liquid is discharged from the system via the overflow system (21) and released into the environment.
  • the idea of the invention of applying a plurality of separately stored means by means of a common spraying device, to which the containers are directly upstream, is not limited to rinsing methods using two means in one / one rinse cycle or zone, but can be expanded as desired.
  • the liquids are stored separately and preferably circulated in separate circuits.

Landscapes

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

Abstract

La présente invention concerne un procédé de lavage dans lequel un premier agent (7) et un second agent (8) sont stockés séparément directement à proximité du même dispositif de lavage (9), de sorte que, durant un ou plusieurs programmes de lavage complets comportant un ou plusieurs cycles de lavage, les agents (7, 8) peuvent être projetés l'un après l'autre ou en même temps sur les objets à laver (2). Cette invention concerne également un lave-vaisselle (1) comprenant un dispositif de pulvérisation (9) directement à proximité duquel se trouvent des réservoirs (13, 14) destinés à contenir séparément un premier agent (7) et un second agent (8). L'invention concerne également l'utilisation d'agents incompatibles dans le procédé de l'invention.
PCT/EP2000/008030 1999-08-26 2000-08-17 Procede de lavage et lave-vaisselle Ceased WO2001014625A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74100/00A AU7410000A (en) 1999-08-26 2000-08-17 Washing method and dishwasher

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940645.6 1999-08-26
DE1999140645 DE19940645A1 (de) 1999-08-26 1999-08-26 Spülverfahren und Spülmaschine

Publications (2)

Publication Number Publication Date
WO2001014625A2 true WO2001014625A2 (fr) 2001-03-01
WO2001014625A3 WO2001014625A3 (fr) 2001-05-03

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EP1657297A1 (fr) 2004-11-15 2006-05-17 Chemische Fabrik Dr. Weigert(GMBH & CO.) Procédé pour le nettoyage de la vaisselle
CN106361244A (zh) * 2011-12-13 2017-02-01 艺康美国股份有限公司 洗碗机
CN111488383A (zh) * 2019-01-28 2020-08-04 宁波方太厨具有限公司 一种用于洗碗机的清洗曲线智能推荐方法
US20220314285A1 (en) * 2019-09-09 2022-10-06 A.Co S.R.L. Machine for washing cages and accessories used in the field of research on laboratory animals

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CN106361244A (zh) * 2011-12-13 2017-02-01 艺康美国股份有限公司 洗碗机
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CN111488383A (zh) * 2019-01-28 2020-08-04 宁波方太厨具有限公司 一种用于洗碗机的清洗曲线智能推荐方法
CN111488383B (zh) * 2019-01-28 2023-04-14 宁波方太厨具有限公司 一种用于洗碗机的清洗曲线智能推荐方法
US20220314285A1 (en) * 2019-09-09 2022-10-06 A.Co S.R.L. Machine for washing cages and accessories used in the field of research on laboratory animals

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WO2001014625A3 (fr) 2001-05-03
AU7410000A (en) 2001-03-19
DE19940645A1 (de) 2001-03-08

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