EP2261414A1 - Procédé de détermination de substances actives lors du nettoyage dans un liquide de traitement - Google Patents

Procédé de détermination de substances actives lors du nettoyage dans un liquide de traitement Download PDF

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Publication number
EP2261414A1
EP2261414A1 EP10004411A EP10004411A EP2261414A1 EP 2261414 A1 EP2261414 A1 EP 2261414A1 EP 10004411 A EP10004411 A EP 10004411A EP 10004411 A EP10004411 A EP 10004411A EP 2261414 A1 EP2261414 A1 EP 2261414A1
Authority
EP
European Patent Office
Prior art keywords
treatment liquid
cleaning
sample
active substances
subset
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.)
Granted
Application number
EP10004411A
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German (de)
English (en)
Other versions
EP2261414B1 (fr
Inventor
Wilhelm Bringewatt
Engelbert Heinz
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.)
Herbert Kannegiesser GmbH and Co
Original Assignee
Herbert Kannegiesser GmbH and Co
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 Herbert Kannegiesser GmbH and Co filed Critical Herbert Kannegiesser GmbH and Co
Publication of EP2261414A1 publication Critical patent/EP2261414A1/fr
Application granted granted Critical
Publication of EP2261414B1 publication Critical patent/EP2261414B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/42—Detergent or additive supply
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user

Definitions

  • the cleaning, in particular the washing, of various objects is carried out with a treatment liquid containing at least one detergent-active substance.
  • a treatment liquid containing at least one detergent-active substance.
  • containers such as bottles, workpieces and items of laundry are cleaned or washed.
  • the cleaning-active and washing-active substances are understood to mean other substances used in the cleaning or washing, for example disinfectant-active and bleach-active substances.
  • the treatment liquid is exchanged between successive treatment steps or successive cleaning operations. In the treatment liquid but then unused cleaning-active substances are present, which are lost when replacing the treatment liquid. This makes treatment unnecessarily expensive and can also lead to environmental pollution. Therefore, it is endeavored to reuse the treatment liquid at least partially.
  • the reuse of the treatment liquid requires to determine the still existing in the same proportion unused cleaning active substances. On the basis of the determined content of cleaning-active substances in the treatment liquid can be decided whether and in what amount cleaning active substances must be added. The determination of the cleaning-active substances still contained in the treatment liquid is time-consuming. Therefore, so far only random samples are performed, which does not always ensure treatment with sufficient cleaning active substances. In particular, in the food industry, for example, in the cleaning of bottles, the random determination of remaining in the treatment liquid residual cleaning active substances can cause problems because it is not always guaranteed that the cleaning is carried out with a sufficiently cleaning active substances containing treatment liquid.
  • a method for achieving this object comprises the measures of claim 1. Accordingly, first the cleaning liquid is filtered and then determined the proportion of cleaning-active substances in the filtered cleaning liquid. By filtering, in particular, undissolved constituents are removed from the treatment liquid, so that then a simple automatic measurement of the remaining portion of cleaning-active substances in the treatment liquid can take place without interrupting the cleaning process. This can be determined in an economical manner without gaps, whether the treatment liquid still contains enough cleaning-active substances.
  • the subset thus forms a sample which can be examined with regard to the proportion of cleaning-active substances.
  • the actual treatment process is not interrupted.
  • the branched sample can be investigated during the current cleaning or washing process, so to speak.
  • the method is preferably provided to separate off the partial quantity serving as a sample with a certain volume from the treatment liquid, preferably during the ongoing cleaning or washing process. It is preferably provided to separate a sample with an exact volume from the treatment liquid by means of a metering pump. This also allows small amounts of a sample accurately and, above all, consistently by successive sampling, with reproducible results.
  • the proportion of cleaning-active substances in the serving as a sample subset is determined due to visible properties of the sample.
  • these visible properties of the sample are caused by the addition of the at least one indicator agent.
  • the visible properties are, in particular, the color that occurs after the at least one indicator agent has been added in the sample.
  • the measure of a turbidity of the sample which is obtained by the addition of the indicator agent, can also serve as a visible property. It is also conceivable that the visible property results from a partial discoloration or clouding of the sample contained in a transparent sample container with the added indicator agent. For example, only a lower part of the sample discolored, it being possible to use the height of the discolored part of the specimen in the specimen vessel to determine the proportion of unused cleaning-active substances in the investigated treatment liquid.
  • the visible properties of the subset of the treatment liquid provided with at least one indicator means are preferably determined by a color measurement, for example a photometric or a spectroscopic color measurement of the sample.
  • a color measurement for example a photometric or a spectroscopic color measurement of the sample.
  • Such a measurement can be reliably and easily carried out automatically within the shortest possible time by detecting the sample in the transparent sample container from a corresponding sensor, for example a color sensor or a light sensor.
  • the respective sensor supplies a signal that is proportional to the color or other visual perceptible property of the sample and thus can be easily evaluated automatically.
  • a preferred embodiment of the method provides for the determination of the proportion of cleaning-active substances in the sample by comparing the result of the measurement of the provided with the indicator means portion of the treatment liquid with preferably several reference samples.
  • the reference samples determine how large the proportion of residual cleaning or washing-active substances in the treatment liquid is for a particular color of the sample provided with the indicator means. It then needs to be made during the current treatment determination of the rest of the active substances in the used treatment liquid only a comparison of the color of the sample with the colors of the reference sample.
  • the reference sample which corresponds or comes closest to the color of the sample to be examined then gives the concentration of residual active substances in the investigated treatment liquid.
  • a visual comparison takes place which can be carried out quickly and, above all, automatically, with the aid of appropriate sensors.
  • the inventively provided filtering the treatment liquid prior to the measurement of the remaining cleaning-active substances is preferably carried out by a countercurrent filtration. It is also conceivable microfiltration, which preferably takes place in countercurrent process according to the membrane technique known per se. As a result, the finest suspended components in the treatment liquid can be filtered out, so that the treatment liquid becomes clear, that is no longer cloudy. On the basis of the filtered transparent treatment liquid can be determined very accurately and reliably by color measurement, by photometry or spectroscopy, how large the remaining portion of the active substances, preferably cleaning active substances in the treatment liquid is still.
  • the inventive method is suitable for washing machines of any kind, but also washing and cleaning machines for other purposes, such as Cleaning of containers in food technology, bottle cleaning, cleaning of objects, in particular workpieces, dishwashers, including household dishwashers, and the like washing and cleaning facilities.
  • Fig. 1 the method according to the invention is shown schematically in connection with a commercial washing machine 10 and a subsequent dewatering device 11.
  • the washing machine 10 is designed as a so-called continuous washing machine with a cylindrical drum 13 which can be driven in rotation about a preferably horizontal axis of rotation 12.
  • the laundry is passed during washing along the axis of rotation 12 through the drum 13, in the illustrated embodiment of the Fig. 1 left to right.
  • the washing machine 10 shown has five treatment chambers 14. However, the invention is not limited thereto.
  • the washing machine 10 may also have more or fewer than five treatment chambers 14.
  • the first treatment chamber 14 is seen in the longitudinal direction of the axis of rotation 12 longer than the other four equally long treatment chambers 14. Again, the invention is not limited.
  • the treatment chambers 14 may all be the same length or have any other, even different, lengths.
  • first two treatment chambers 14 form a prewash zone.
  • the subsequent two treatment chambers 14, the third and fourth treatment chambers 14, form a final wash zone.
  • the last (fifth) treatment chamber 14 serves to rinse the laundry and thus forms a rinsing zone.
  • the first treatment chamber 14 of the final wash zone (third treatment chamber 14 in the Fig. 1 ) is provided with a fixed outer drum 15.
  • the last treatment chamber 14 forming the rinsing zone (fifth treatment chamber 14 in FIG Fig. 1 ) on an outer drum 16.
  • the outer drums 15 and 16 serve to separate the laundry in the respective treatment chambers 14 from the treatment liquid bound therein, the free liquor.
  • the collecting in the outer drums 15 and 16 treatment liquid is returned via a return line 17 to the first treatment chamber 14, ie the Prewash zone and the third treatment chamber 14, ie at the beginning of the final wash zone.
  • Valves not shown in the return line 17 can serve to direct the treatment liquid to the beginning of the prewash zone and / or to the beginning of the final wash zone.
  • Fig. 1 the return line 17 at the beginning (based on the direction of flow of the treatment liquid through the return line 17) on a pre-filter 18 for separating large solid components from the treatment liquid.
  • a pre-filter 18 Behind the pre-filter 18 is a first storage tank 19.
  • a feed pump 20 which pumps the treatment liquid through the return line 17.
  • the feed pump 20 may be located at any other point of the return line 17, for example in front of the pre-filter 18.
  • On the feed pump 20 follows in the flow direction of the treatment liquid through the return line 17, a filter 21.
  • Behind the filter 21 branches from the return line 17 in the illustrated embodiment a bypass line 22, which leads to a measuring device 23.
  • the measuring device 23 is thereby integrated into the bypass line 22.
  • branch valve 25 there, where the beginning and the end of the bypass line 22 branch off from the return line 17, there is in each case a branch valve 25.
  • the branch valves 25 may be configured as lockable multi-way valves, which are, for example, electromagnetically actuated. Behind the bypass line 22 and the measuring device 23 is another storage tank 24. From this, the treatment liquid passes through the subsequent part of the return line 17 to the beginning of the prewash zone and / or final wash zone.
  • the prefilter 18, the storage tank 19 and / or the storage tank 24 are not mandatory.
  • the method according to the invention can thus also be carried out without it.
  • only the feed pump 20, the filter 21 and the bypass line 22 are provided with the measuring device 23 in the return line 17 in the flow direction.
  • the filter 21 serves to remove at least a large part of undissolved constituents, including fine undissolved constituents, from the treatment liquid.
  • the solid components are removed so far that the treatment liquid no longer has turbidity, in particular is clear.
  • the filter 21 is designed as a fine filter for this purpose.
  • the filter 21 operates according to the counterflow principle with at least one filter membrane.
  • the treatment liquid is filtered very finely by the filter 21 in such a way that at least one microfiltration, preferably an ultrafiltration or a nanofiltration, takes place.
  • the measuring device serves to measure, during the washing process in the washing machine 10, that is, when the treatment liquid is flowing continuously through the return line 17, what is the proportion of unused active substances in the treatment liquid.
  • the measurement of the proportion of unused cleaning-active substances according to the invention is carried out in situ in an uninterrupted washing process.
  • the measuring device 23 has a in the Fig. 1 not shown branching device, in particular a metering pump, which is diverted from the treatment liquid in the bypass line 22, a precisely predetermined amount of treatment liquid.
  • This branched treatment liquid is a small fixed portion, which serves as a sample for determining the active substances still contained in the treatment liquid.
  • the branched off from the dosing pump subset of the treatment liquid, namely the sample, passes into a transparent sample vessel, such as a test tube of appropriate size.
  • the metering pump behind the filter 21 directly in the return line 17.
  • the metering pump then branches off from the return line 17 serving as a sample small subset of the treatment liquid with a precisely predetermined volume.
  • the then branched off from the metering pump directly from the return line 17 treatment liquid passes through a corresponding line directly to the measuring device 23.
  • the bypass line 22 can be omitted with the two branch valves 25.
  • a supply line 26 for an indicator means, such as a reagent, out Via the supply line 26, a precisely metered amount of the indicator agent is added to the serving as a sample subset of branched off from the return line 17 treatment liquid.
  • the preferably liquid indicator agent is also added to the sample vessel.
  • the measuring device 23 has at least one in the Fig. 1 not shown sensor which detects at least one visually perceptible feature of the sample provided with the indicator means.
  • this is a color sensor that determines the color that the sample receives by the addition of the indicator agent.
  • the sensor provides a signal dependent on the color of the sample with the indicator means.
  • This signal is compared with data stored in a memory of the measuring device 23, preferably reference values which have been recorded on the basis of reference measurements and correspond to certain colors of active substance concentrations in a treatment liquid.
  • the measuring device 23 then automatically compares the color of the sample recorded by the respective sensor with the predetermined reference colors.
  • the sample with the added indicator agent is disposed of via a drain 27.
  • the sample with the indicator means does not return to the return line 17.
  • the measurement of the proportion of washing-active substances in the treatment liquid can be carried out continuously, but also intermittently, namely with each separation of the treatment liquid from each washed laundry items.
  • the treatment liquid originating from a washing process can be measured several times.
  • the measurement of the proportion of remaining active substances in the treatment liquid by means of the measuring device 23 is effected by the determination of visually perceptible properties of a sample.
  • the color of the sample is determined by photometry or spectroscopy.
  • the treatment liquid is first filtered, preferably a fine filtration, such as a microfiltration, subjected at least a majority of the undissolved in the treatment liquid particles are removed, so that a clear and preferably colorless treatment liquid leaves the filter 21 without any haze.
  • a fine filtration such as a microfiltration
  • a subset of the treatment liquid is diverted from the return line 17 for each measurement, specifically with a defined subset.
  • a sample with an exact volume of clear and preferably colorless treatment liquid is available for carrying out the measurement.
  • the treatment liquid is supplied with an exact volume of an indicator agent, in particular an indicator liquid, for example a reagent.
  • the sample and the indicator means are held in the measuring device 23 in a transparent sample container, for example a test tube. This can be determined by a sensor in the measuring device 23, the adjusting by adding the indicator agent discoloration of the sample.
  • the determined color of the sample in particular a measurement signal derived therefrom, is compared with reference values of reference measurements stored in the measuring device 23.
  • the concentrations of at least one active substance in the treatment liquid belonging to the individual reference colors are known.
  • the reference colors or corresponding measured values can then be compared with the color of the respective sample. In this comparison, it is determined with which reference color the color of the sample matches or which reference color comes closest to the color of the sample. From this information can then be drawn on the concentration of the remaining cleaning or washing-active substances in the examined treatment liquid.
  • the sample containing the indicator agent is discarded after the measurement. Consequently, there is no return of the sample in the return line 17, which could have an influence on the treatment liquid in the return line 17 result because the sample not only treatment liquid, but also for measuring her added indicator means, such as a reagent contains.
  • the treatment liquid is led into the drain and replaced by new treatment liquid or there is a metered addition of at least one active substance.
  • the return line 17 a through valves to To install opening and closable short-circuit line, whereby the treatment liquid with metered fresh substances in circulation on the measuring device 23 can be passed to determine from the measuring device 23, the content of the active substances after adding additional substances to the treatment liquid.
  • the Fig. 2 shows the inventive method together with a bottle cleaning device 28.
  • the bottles to be cleaned first pass through a pre-wash zone 30, then a final wash zone 31 and finally a subsequent rinse zone 32. Each zone is formed by one of a total of three successive chambers.
  • Cleaning liquid accumulating in the pre-wash zone 30 and in the final wash zone 31 can be diverted through a return line 33.
  • the cleaning liquid is first filtered. Thereafter, the concentration of cleaning active substances still contained in the cleaning liquid during the current cleaning process is determined in a measuring device. The cleaning liquid is then returned to the prewash zone 30 and / or the final wash zone 31.
  • the determination of the remaining cleaning-active substances in the treatment liquid from the bottle cleaning device 28 is the same as in the previously described washing machine 10. Therefore, the same reference numbers of the devices in the return line 17 of the washing machine 10 are used for the same facilities in the return line 33.
  • a pre-filter 18, a storage tank 19, a feed pump 20, a filter 21, a bypass line 22, a measuring device 23 and a storage tank 24 is provided in the return line 33 of the bottle cleaning device 28 are thus seen in the flow direction of the cleaning liquid.
  • a pre-filter 18, a storage tank 19, a feed pump 20, a filter 21, a bypass line 22, a measuring device 23 and a storage tank 24 is provided. These are designed in the same way and perform the same function as in the washing machine 10.
  • the prefilter 18, the storage tank 19 and / or the storage tank 24 may be missing.
  • the method for determining residual cleaning-active substances in the treatment liquid of the bottle washer 28 is the same as in the washing machine 10. Reference is therefore made to the explained in connection with the washing machine 10 method.
  • the invention is not only suitable for washing machines 10 and bottle washing machines 28, but more generally for washing and cleaning machines of all kinds, especially for commercial laundries, for container cleaning, in food technology, for industrial washing and cleaning processes and also household washing machines and household dishwashers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP10004411.4A 2009-06-12 2010-04-27 Procédé de détermination de substances actives lors du nettoyage dans un liquide de traitement Active EP2261414B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009025158A DE102009025158A1 (de) 2009-06-12 2009-06-12 Verfahren zur Ermittlung reinigungsaktiver Substanzen in einer Behandlungsflüssigkeit

Publications (2)

Publication Number Publication Date
EP2261414A1 true EP2261414A1 (fr) 2010-12-15
EP2261414B1 EP2261414B1 (fr) 2020-06-24

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EP (1) EP2261414B1 (fr)
DE (1) DE102009025158A1 (fr)
DK (1) DK2261414T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644080A1 (fr) * 2012-03-29 2013-10-02 Candy S.p.A. Appareil permettant de récupérer le liquide de lavage et/ou de rinçage dans un lave-vaisselle
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896827A (en) * 1973-08-31 1975-07-29 Norman R Robinson Dish machine monitoring of time, temperature, alkalinity, and pressure parameters
DE3916910A1 (de) * 1989-05-24 1990-11-29 Henkel Kgaa Einrichtung zum dosieren von desinfektionsmitteln
US5272893A (en) * 1992-09-11 1993-12-28 White Consolidated Industries, Inc. Enzyme bath maintenance system
DE4436141A1 (de) * 1994-10-10 1996-04-11 E & S Automation Gmbh Verfahren und Vorrichtung zum Reinigen und Sterilisieren von Gegenständen
DE10056069A1 (de) * 2000-11-08 2002-05-23 Univ Dresden Tech Verfahren und Einrichtung zur Messung der Konzentration von Peroxodisulfat
US20030213069A1 (en) * 2002-05-20 2003-11-20 Tortorici Paul Lee System and method of surfactant dosing
EP1983087A2 (fr) * 2007-04-20 2008-10-22 Herbert Kannegiesser GmbH Procédé et dispositif destinés au traitement humide de pièces de linge
EP1997948A1 (fr) * 2007-05-29 2008-12-03 Herbert Kannegiesser GmbH Procédé de traitement humide de pièces de linge

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896827A (en) * 1973-08-31 1975-07-29 Norman R Robinson Dish machine monitoring of time, temperature, alkalinity, and pressure parameters
DE3916910A1 (de) * 1989-05-24 1990-11-29 Henkel Kgaa Einrichtung zum dosieren von desinfektionsmitteln
US5272893A (en) * 1992-09-11 1993-12-28 White Consolidated Industries, Inc. Enzyme bath maintenance system
DE4436141A1 (de) * 1994-10-10 1996-04-11 E & S Automation Gmbh Verfahren und Vorrichtung zum Reinigen und Sterilisieren von Gegenständen
DE10056069A1 (de) * 2000-11-08 2002-05-23 Univ Dresden Tech Verfahren und Einrichtung zur Messung der Konzentration von Peroxodisulfat
US20030213069A1 (en) * 2002-05-20 2003-11-20 Tortorici Paul Lee System and method of surfactant dosing
EP1983087A2 (fr) * 2007-04-20 2008-10-22 Herbert Kannegiesser GmbH Procédé et dispositif destinés au traitement humide de pièces de linge
EP1997948A1 (fr) * 2007-05-29 2008-12-03 Herbert Kannegiesser GmbH Procédé de traitement humide de pièces de linge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644080A1 (fr) * 2012-03-29 2013-10-02 Candy S.p.A. Appareil permettant de récupérer le liquide de lavage et/ou de rinçage dans un lave-vaisselle
CN103356145A (zh) * 2012-03-29 2013-10-23 坎迪股份公司 用于回收洗碗机中的洗涤液和/或冲洗液的设备
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration
US11739460B2 (en) 2018-08-27 2023-08-29 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

Also Published As

Publication number Publication date
DK2261414T3 (da) 2020-09-14
EP2261414B1 (fr) 2020-06-24
DE102009025158A1 (de) 2010-12-16

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