WO1993005696A1 - Procede de commande et de regulation de l'alimentation en produit de lavage d'un lave-vaisselle - Google Patents

Procede de commande et de regulation de l'alimentation en produit de lavage d'un lave-vaisselle Download PDF

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Publication number
WO1993005696A1
WO1993005696A1 PCT/EP1992/002160 EP9202160W WO9305696A1 WO 1993005696 A1 WO1993005696 A1 WO 1993005696A1 EP 9202160 W EP9202160 W EP 9202160W WO 9305696 A1 WO9305696 A1 WO 9305696A1
Authority
WO
WIPO (PCT)
Prior art keywords
rinsing
phase
cycle
detergent
cleaning
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/EP1992/002160
Other languages
German (de)
English (en)
Inventor
Friedel Rings
Günther Hahn
Karl Helminger
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6441682&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1993005696(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to DE59206716T priority Critical patent/DE59206716D1/de
Priority to EP92919612A priority patent/EP0605507B1/fr
Publication of WO1993005696A1 publication Critical patent/WO1993005696A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—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
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • 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
    • A47L2401/30—Variation of electrical, magnetical or optical quantities
    • 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

Definitions

  • the invention relates to a method for controlling and regulating the supply of cleaning agent in a dishwasher and to a control device for carrying out the method.
  • Conveyor belt dishwashers are used in which the items to be washed pass through several cleaning stations in succession on a conveyor belt.
  • a method is known for controlling and regulating the supply of cleaning agent in such dishwashers, which works with a dosing device for the cleaning agent and with a control device, for setting and keeping the cleaning agent concentration constant and for carrying out start-up phases and rinsing phases.
  • the control device controls the supply of cleaning agent to the washing tank or tanks of the dishwasher in which the washware is in
  • the dishes are washed at a low detergent concentration.
  • the normal cycle is divided into a start-up phase and a rinse phase.
  • the rinse tank is filled with water and a predetermined first amount of detergent is supplied, so that after the start-up phase in the rinse tank, the rinse water contains the desired detergent concentration.
  • the detergent concentration is regulated to a first setpoint A by means of the metering device.
  • a disadvantage of the prior art is that the detergent dosing for the basic cleaning must be carried out manually by an operator and that the operator is exposed to health risks which are caused on the one hand by rinsing water vapors and on the other hand by rinsing water drops.
  • Another disadvantage is the fact that different cleaning agents must be stored.
  • the object of the invention is to facilitate basic cleaning in a dishwasher.
  • the method according to the invention works with a control device which carries out a basic cleaning cycle in addition to the normal cycle.
  • the same cleaning agent is used in the basic cleaning cycle as in the normal cycle.
  • a predetermined second quantity of cleaning agent is supplied, which is substantially larger than the first quantity of cleaning agent in the normal cycle. Characterized that. Rinse water obtained a cleaning agent concentration, basic cleaning can be performed with the in Grund ⁇ cleaning cycle. In a basic cleaning rinsing phase, the detergent concentration is raised to a second setpoint B, which is substantially greater than the first setpoint A of the normal cycle.
  • I is a schematic representation of a
  • Fig. 2 is a block diagram for an embodiment of the control device according to the invention.
  • the dishwasher 1 shown in FIG. 1 is designed as a conveyor belt dishwasher and has three washing tanks 2a, 2b, 2c.
  • each washing tank 2a, 2b, 2c there is an overflow 3a, 3b, 3c, via which washing water can overflow from one to another washing tank.
  • the overflow 3a of the (based on the running direction of the wash items) first wash tank 2a is connected to a drain 4.
  • the fresh water supply takes place via the fresh water rinse 5 arranged at the outlet end of the items to be washed.
  • the rinse tanks 2a, 2b, 2c are arranged such that the rinse water cascades from the fresh water rinse 5 first into the third rinse tank 2c, from there into the middle one Rinse tank 2b and finally reaches the drain 4 via the first rinse tank 2a.
  • a conveyor belt 6 is located above the wash tanks 2a, 2b, 2c and moves the washware first over the first wash tank 2a, then the middle wash tank 2b and finally the third wash tank 2c to the fresh water rinse 5.
  • Above the wash tanks 2a , 2b, 2c are arranged spray registers 7a, 7b and 7c by pumps 8a, 8b and 8c are fed from the respective flushing tank 2a, 2b, 2c located below.
  • Each spray register 7a, 7b, 7c is therefore assigned to a washing tank 2a, 2b, 2c and a pump 8a, 8b, 8c located therein.
  • the spray registers 7a, 7b, 7c remove the food residues from the items to be washed by means of washing water from spray nozzles which are directed against the items to be washed both from above and from below. With the fresh water rinse 5, the wash ware is also freed from detergent residues.
  • the rinsing water is transported from the rinsing tank to the rinsing tank in the opposite direction of the conveyor belt. It is thereby achieved that the third washing tank 2c is the cleanest, the coarsest food residues already being removed above the first washing tank 2a.
  • the cleaning agent is supplied for all rinsing tanks 2a, 2b, 2c in the third (last) rinsing tank 2c. This is connected via pipes 9 to a metering device 10 which takes the detergent from a detergent container 11 and conveys it into the washing tank 2c.
  • the dosing device works with a constant delivery rate.
  • the cleaning agent can be liquid or in powder form. Powder cleaner containing caustic alkali is preferably used, which can also be added in dissolved form.
  • a measuring probe 12 is arranged in the third washing tank 2c.
  • the measuring probe 12 is designed as a conductivity measuring cell and determines the detergent concentration, which is essentially proportional to the conductivity, via the conductivity of the rinsing water.
  • the supply of cleaning agent is controlled and regulated by means of a control and regulating device 13, which evaluates the measured values of the measuring probe 12.
  • the control and regulating device 13, the block diagram of which is shown in FIG. 2, evaluates the measurement signals of the measurement probe 12.
  • the signals emanating from the measuring probe 12 are fed to a measured value amplifier 14 and a monitoring device 15.
  • a display part 16 is connected to the measured value amplifier 14 and displays the current detergent concentration. In addition, the display part 16 can display the target value for the detergent concentration.
  • the control and regulating device 13 is equipped with a selector switch 17 for the "normal cleaning" function and a selector switch 18 for the "basic cleaning" function, with which it can be selected whether a normal cycle or a basic cleaning cycle is to be carried out .
  • Each selector switch 17, 18 is connected to a measuring range presetting part 19a, 19b, which is connected to the measured value amplifier 14 and, depending on the selected cycle, sets this to a predetermined measuring range when the respective selector switch 17, 18 has been pressed.
  • each selector switch 17, 18 has a setpoint generator 20a, 20b, which is adjustable and outputs the set cleaning agent concentration when the selector switch 17, 18 has been pressed.
  • the signal representing the target value A, B for the detergent concentration, which emanates from the target value transmitter 20a, 20b, is fed into the monitoring device 15.
  • the signal is also led to the display part 16 and there causes the setpoint A, B for the cleaning agent concentration to be displayed.
  • Predosing means that the in the rinsing tanks 2a, 2b, 2c, initially clear water is supplied for a time determined by a pre-metering timer 21a, 21b in order to bring the concentration of the rinsing liquor into the desired order.
  • abut ⁇ device In order to avoid that takes place in 'failures constant cleaning agent supply', abut ⁇ device is provided. This has a dosing time limiter 22 which is connected to a comparison timer 23. When the dosing device is switched on, the dosing time limiter 22 is also switched on by the monitoring device 15 in the rinsing phase during normal cleaning.
  • the Dosierzeitbeskyr 22 compares the elapsed dispensing time which is the time that the metering device has worked 10, with • the preset value from the comparison timer 23 and sends a signal to the monitoring device 15 further, so that the controller 15 after the same period exceed the metering 10 turns off.
  • the comparison time can refer to the entire cycle or to a single conveying process.
  • the desired value A for the set detergent concentration is between 2.5-8.5 g / l of caustic alkali powder cleaner, preferably about 5 g / l. This corresponds approximately to a conductivity of the rinsing water of 10 Scm or 30 mScm " .
  • the selector switch 17 is pressed to initiate the normal cycle, the measuring range of the measuring amplifier 14 is set to the range from 0 to 8.5 g / 1 or 0 to 30 mScm - * contained in the measuring range presetting part 19a.
  • the setpoint A for the cleaning agent concentration is supplied by the setpoint generator 20a of the selector switch 17 to the monitoring device 15.
  • the comparison time for the dosing time limit set on the selector switch 17 is fed to the dosing time limiter 22.
  • the pre-metering timer 21a determines the time for the pre-metering from the first target value A for the cleaning agent concentration.
  • the control and regulating device 13 first carries out the start-up phase.
  • the monitoring device 15 switches on the metering device 10, which now delivers cleaning agent into the third washing tank 2c at a constant delivery rate.
  • the dosing time limit is switched off with the dosing time limiter 22.
  • the monitoring device 15 keeps the dosing device 10 switched on until the predefined dosing time has expired.
  • the rinsing tanks 2a, 2b, 2c are filled and brought approximately to the required detergent concentration.
  • the control and regulating device 13 then switches over to the rinsing phase 32.
  • the monitoring device 15 continuously monitors the cleaning agent concentration and keeps it constant by means of two-point control. During the control, the signal emanating from the measuring probe 12 is compared in the monitoring device 15 with the setpoint A from the setpoint generator 20a, and the do- sier worn 10 on or off.
  • the dishwashing phase is ended by switching off the dishwasher. If, however, the dosing time has exceeded the predetermined comparison time, that is the limit value given by the comparison timer 23, a warning signal is given and the dishwasher 1 is switched off.
  • the basic cleaning cycle corresponds essentially to the normal cycle.
  • the contents of the setpoint generator 20b and the measuring range presetting part are transferred to the monitoring device 15, the predosing timer 21b, the display part 16 and the measured value amplifier 14.
  • the value stored in the pre-metering timer 21b which corresponds to the pre-metering time determined on the basis of the target value B from the target value transmitter 20b, is correspondingly greater than the value stored in the pre-metering timer 21a.
  • the set upon pressing the selection switch 18 in the reference value generator 20b ⁇ target value B is supplied to the display part 16 indicating the target value B.
  • the measuring range presetting part 19b is also actuated by pressing, so that the measuring value amplifier 14, which amplifies the signal of the measuring probe 12 and displays it on the display part 16, is set or switched over to a higher measuring range.
  • the cleaning agent concentration set is namely 15-35 g / 1, preferably 15 g / 1.
  • the set measuring range therefore corresponds to a cleaning agent concentration of 0 - 3 & g / 1.
  • the detergent concentration is brought to a much higher value by supplying detergent by means of the metering device 10 than in the normal start-up phase.
  • the basic cleaning start-up phase which corresponds to the start-up phase, is followed by the basic cleaning-rinsing phase, which corresponds to the rinsing phase.
  • the setpoint B from the setpoint generator 20b, which is fed to the monitoring device 15, is used for two-point control at a high level.
  • the cleaning agent concentration is kept constant in the basic cleaning rinsing phase, as in the rinsing phase.
  • the dosing time limiter 22 is always switched off in the basic cleaning cycle, i.e. also in the rinsing phase.
  • the fresh water supply via the fresh water rinse 5 is switched off and all the rinsing tanks 2a, 2b, 2c are emptied.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

L'invention concerne un procédé pour commander et réguler l'alimentation en produit de lavage d'un lave-vaisselle (1) ainsi qu'un dispositif de commande et de régulation (13) permettant de mettre en oeuvre ledit procédé. Le procédé est réalisé au moyen d'un dispositif de commande et de régulation (13) qui en plus du cycle de lavage normal exécute un cycle de lavage minutieux. Lors du cycle de lavage minutieux, c'est le même produit de nettoyage qui est utilisé que pendant le cycle de lavage normal et l'alimentation en produit de nettoyage se fait, pendant le cycle de lavage normal et pendant le cycle de lavage minutieux, au moyen du même dispositif de dosage (10). Pour qu'il soit possible d'utiliser le même produit de lavage pendant le cycle de lavage normal et pendant le cycle de lavage minutieux, le lave-vaisselle est, pendant le cycle de lavage minutieux, alimenté en une concentration de produit de lavage plusieurs fois plus grande que la concentration utilisée pour le cycle de lavage normal. On sélectionne le cycle à exécuter en appuyant sur un sélecteur.
PCT/EP1992/002160 1991-09-27 1992-09-18 Procede de commande et de regulation de l'alimentation en produit de lavage d'un lave-vaisselle Ceased WO1993005696A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59206716T DE59206716D1 (de) 1991-09-27 1992-09-18 Verfahren und Vorrichtung zur Steuerung und Regelung der Reinigungsmittelzufuhr einer Geschirrspülmaschine
EP92919612A EP0605507B1 (fr) 1991-09-27 1992-09-18 Procédé et dispositif de commande et de régulation de l'alimentation en produit de lavage d'un lave-vaisselle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4132306A DE4132306A1 (de) 1991-09-27 1991-09-27 Verfahren zur steuerung und regelung der reinigungsmittelzufuhr einer geschirrspuelmaschine
DEP4132306.8 1991-09-27

Publications (1)

Publication Number Publication Date
WO1993005696A1 true WO1993005696A1 (fr) 1993-04-01

Family

ID=6441682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/002160 Ceased WO1993005696A1 (fr) 1991-09-27 1992-09-18 Procede de commande et de regulation de l'alimentation en produit de lavage d'un lave-vaisselle

Country Status (6)

Country Link
EP (1) EP0605507B1 (fr)
AT (1) ATE139891T1 (fr)
DE (2) DE4132306A1 (fr)
DK (1) DK0605507T3 (fr)
ES (1) ES2088592T3 (fr)
WO (1) WO1993005696A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014424A3 (fr) * 1993-11-20 1995-06-29 Diversey Corp Procede de lavage dans un lave-vaisselle
WO1998026704A1 (fr) * 1996-12-18 1998-06-25 Lang Apparatebau Gmbh Procede de dosage pour introduire un detergent dans un lave-vaisselle
US8092613B2 (en) 2002-05-31 2012-01-10 Ecolab Usa Inc. Methods and compositions for the removal of starch
US8758520B2 (en) 2011-05-20 2014-06-24 Ecolab Usa Inc. Acid formulations for use in a system for warewashing
US9139800B2 (en) 2011-12-13 2015-09-22 Ecolab Usa Inc. Concentrated warewashing compositions and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490467A (en) * 1966-07-11 1970-01-20 Intercontinental Chem Corp Method of monitoring and maintaining concentration of depletable work solutions
US4076146A (en) * 1976-03-03 1978-02-28 Gibson Chemicals International Pty. Limited Dishwashers and detergent dispensers
US4733798A (en) * 1986-02-05 1988-03-29 Ecolab Inc. Method and apparatus for controlling the concentration of a chemical solution
CH665547A5 (en) * 1984-11-22 1988-05-31 Electrolux Ag Automatic dish-washer with at least three programs - has additional washing parameter selection buttons for increased flexibility

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938755A1 (de) * 1989-11-23 1991-05-29 Henkel Kgaa Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490467A (en) * 1966-07-11 1970-01-20 Intercontinental Chem Corp Method of monitoring and maintaining concentration of depletable work solutions
US4076146A (en) * 1976-03-03 1978-02-28 Gibson Chemicals International Pty. Limited Dishwashers and detergent dispensers
CH665547A5 (en) * 1984-11-22 1988-05-31 Electrolux Ag Automatic dish-washer with at least three programs - has additional washing parameter selection buttons for increased flexibility
US4733798A (en) * 1986-02-05 1988-03-29 Ecolab Inc. Method and apparatus for controlling the concentration of a chemical solution

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014424A3 (fr) * 1993-11-20 1995-06-29 Diversey Corp Procede de lavage dans un lave-vaisselle
WO1998026704A1 (fr) * 1996-12-18 1998-06-25 Lang Apparatebau Gmbh Procede de dosage pour introduire un detergent dans un lave-vaisselle
US8092613B2 (en) 2002-05-31 2012-01-10 Ecolab Usa Inc. Methods and compositions for the removal of starch
US8709167B2 (en) 2002-05-31 2014-04-29 Ecolab Usa Inc. Methods and compositions for the removal of starch
US8882932B2 (en) 2002-05-31 2014-11-11 Ecolab Usa Inc. Methods and compositions for the removal of starch
US8758520B2 (en) 2011-05-20 2014-06-24 Ecolab Usa Inc. Acid formulations for use in a system for warewashing
US9481857B2 (en) 2011-05-20 2016-11-01 Ecolab Usa Inc. Acid formulations for use in a system for warewashing
US9139800B2 (en) 2011-12-13 2015-09-22 Ecolab Usa Inc. Concentrated warewashing compositions and methods

Also Published As

Publication number Publication date
DK0605507T3 (da) 1996-11-04
DE4132306A1 (de) 1993-04-08
ES2088592T3 (es) 1996-08-16
EP0605507A1 (fr) 1994-07-13
ATE139891T1 (de) 1996-07-15
DE59206716D1 (de) 1996-08-08
EP0605507B1 (fr) 1996-07-03

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