EP0605507B1 - Procédé et dispositif de commande et de régulation de l'alimentation en produit de lavage d'un lave-vaisselle - Google Patents

Procédé et dispositif de commande et de régulation de l'alimentation en produit de lavage d'un lave-vaisselle Download PDF

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Publication number
EP0605507B1
EP0605507B1 EP92919612A EP92919612A EP0605507B1 EP 0605507 B1 EP0605507 B1 EP 0605507B1 EP 92919612 A EP92919612 A EP 92919612A EP 92919612 A EP92919612 A EP 92919612A EP 0605507 B1 EP0605507 B1 EP 0605507B1
Authority
EP
European Patent Office
Prior art keywords
detergent
cycle
rinse
phase
concentration
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.)
Revoked
Application number
EP92919612A
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German (de)
English (en)
Other versions
EP0605507A1 (fr
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
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Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0605507A1 publication Critical patent/EP0605507A1/fr
Application granted granted Critical
Publication of EP0605507B1 publication Critical patent/EP0605507B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • A47L15/24—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 a control device for carrying out the method.
  • the rinse tank is filled with water and a predetermined first amount of detergent is supplied so that the rinse water in the rinse tank contains the desired detergent concentration after the start-up phase.
  • the detergent concentration is regulated to a first target value A by means of the metering device.
  • Stubborn food residues, especially accumulated starch, can not be removed with the method, so that the dishes have to be cleaned from time to time about once a month.
  • This basic cleaning uses a highly effective second cleaning agent that is added to the rinsing water by hand.
  • an operator distributes the second cleaning agent inside the dishwasher using a shovel or similar device.
  • the losses are continuously compensated by hand by further sprinkling in the second detergent.
  • a disadvantage of the prior art is that the detergent dosing for basic cleaning must be carried out manually by an operator and that this 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 that different cleaning agents must be kept in stock.
  • the invention has for its object 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 for the basic cleaning cycle as for 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. This gives the rinse water a detergent concentration with which the basic cleaning can be carried out in the basic cleaning cycle.
  • the cleaning agent concentration is raised to a second setpoint B, which is significantly greater than the first setpoint A of the normal cycle.
  • the same control and metering device is used both for the supply of the first and the second amount of detergent and for the regulation of the detergent concentration in the rinsing phase and the basic cleaning rinsing phase.
  • the presence and intervention of an operator is no longer necessary. In addition, it is no longer necessary to store a second detergent.
  • the dishwasher 1 shown in FIG. 1 is designed as a conveyor belt dishwasher and has three washing tanks 2a, 2b, 2c. In 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 ware) 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 washing tanks 2a, 2b, 2c are arranged such that the rinsing water cascades from the fresh water rinsing 5 first into the third rinse tank 2c, from there into the middle rinse tank 2b and finally reaches the drain 4 via the first washing tank 2a.
  • a conveyor belt 6 is located above the washing tanks 2a, 2b, 2c and moves the wash ware first over the first washing tank 2a, then the middle washing tank 2b and finally the third washing tank 2c to the fresh water rinse 5.
  • Spray registers 7a, 7b and 7c are arranged by pumps 8a, 8b and 8c are fed from the respective rinse tank 2a, 2b, 2c 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 washing tanks 2a, 2b, 2c in the third (last) washing 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 rinsing tank 2c.
  • the measuring probe 12 is designed as a conductivity measuring cell and, via the conductivity of the rinsing water, determines the detergent concentration, which is essentially proportional to the conductivity.
  • 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 evaluates the measurement signals of the measurement probe 12. For this purpose, 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, which shows the current detergent concentration, is connected to the measured value amplifier 14. 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 measuring 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 detergent concentration when the selector switch 17, 18 has been pressed.
  • the signal representing the setpoint A, B for the detergent concentration, which is emitted by the setpoint generator 20a, 20b, is fed into the monitoring device 15.
  • the signal is also led to the display part 16 and there causes the display of the target value A, B for the detergent concentration.
  • Predosing means that the In the rinse 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 rinse liquor into the desired order.
  • a safety device is provided to prevent a constant supply of cleaning agent in the event of a defect.
  • This has a dosing time limiter 22, which is connected to a comparison timer 23.
  • the dosing time limiter 22 is also switched on by the monitoring device 15 in the rinsing phase during normal cleaning.
  • the dosing time limiter 22 compares the elapsed dosing time, that is the time that the dosing device 10 has been working, with the preset value from the comparison timer 23 and forwards a signal to the monitoring device 15 so that the controller 15, after exceeding the comparison time, the dosing device 10 turns off.
  • the comparison time can refer to the entire cycle or to a single conveying process.
  • the target 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 mScm -1 or 30 mScm -1 .
  • the measuring range of the measuring amplifier 14 is set to the range of 0 - 8.5 g / l or 0 - 30 mScm -1 contained in the measuring range presetting part 19a.
  • the setpoint A for the detergent concentration is supplied from 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 detergent 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 to approximately 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.
  • 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, depending on the comparison result, the metering device 10 on or off.
  • the washing phase is ended by switching off the dishwasher. However, if the dosing time has exceeded the predefined comparison time, that is to say the limit value given by the comparison timer 23, a warning signal is issued 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 measuring 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 setpoint B set when the selector switch 18 is pressed in the setpoint generator 20b is fed to the display part 16, which displays the setpoint 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 set detergent concentration is 15 - 35 g / l, preferably 15 g / l.
  • the set measuring range therefore corresponds to a cleaning agent concentration of 0 - 35 g / l.
  • the detergent concentration is brought to a substantially 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 rinse phase, which corresponds to the rinse phase.
  • the setpoint B from the setpoint generator 20b, which is fed to the monitoring device 15, is used for a 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 is switched off via the fresh water rinse 5 and all the rinsing tanks 2a, 2b, 2c are emptied.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (7)

  1. Procédé de commande et de régulation de l'alimentation en produit de lavage d'un lave-vaisselle (1), qui comprend un mécanisme de dosage (10) du produit de lavage, un dispositif de commande et de régulation, (13) pour le réglage et le maintien de la constance en concentration du produit de lavage et pour la réalisation des phases de démarrage et des phases de lavage, procédé dans lequel dans un cycle normal :
    - la phase de démarrage commence par le remplissage de réservoirs de lavage vides auparavant (2a, 2b, 2c) avec amenée de produit de lavage et se termine après alimentation d'une première quantité de produit de lavage déterminée auparavant avec des réservoirs de lavage (2a, 2b, 2c) remplis et,
    - la phase de lavage commence après le déroulement de la phase de mise en service, phase de lavage dans laquelle la concentration dans au moins un des réservoirs de lavage (2c) est régulée par la mesure de la conductibilité électrique de l'eau de lavage et par des additions fonctions de cette dernière de plus d'agent de lavage à une première valeur de consigne A,
       caractérisé par :
    - l'exécution d'un cycle de lavage de base, dans lequel après alimentation du même produit de lavage que dans le cycle normal au moyen du mécanisme de dosage (10) contrôlé par le dispositif de commande et de régulation (13),
    - on alimente dans une phase de démarrage du lavage de base une deuxième quantité d'agent de lavage, qui est essentiellement plus grande que la première, et
    - on régule dans une phase de lavage du lavage de base la concentration de produit de nettoyage à une deuxième valeur de consigne (B), qui est essentiellement plus grande que la première valeur de consigne (A).
  2. Procédé selon la revendication 1, caractérisé en ce qu'une limite de temps de dosage est réalisée, qui intervient, lorsque la somme des durées d'alimentation à l'intérieur d'un intervalle préétabli dépasse une valeur limite.
  3. Procédé selon la revendication 2, caractérisé en ce que la limite du temps de dosage est déconnectée pendant la phase de mise en route et pendant tout le cycle de lavage de base.
  4. Procédé selon une des revendications 1-3, caractérisé en ce qu'avec la mise en circuit du cycle de lavage de base a lieu une commutation du domaine de mesure d'un amplificateur de valeur de mesure (14) pour la concentration de produit de nettoyage.
  5. Procédé selon une des revendications 1-4, caractérisé en ce que la première valeur de consigne (A) de la concentration en produit de lavage se situe dans le domaine de 2,5-8,5 g de produit de nettoyage en poudre par litre de quantité d'eau.
  6. Procédé selon une des revendications 1-5, caractérisé en ce que la deuxième valeur de consigne (B) est au moins 2 fois, de préférence trois fois plus grande que la première valeur de consigne (A).
  7. Dispositif de commande et de régulation (13) d'un lave-vaisselle (1) pour réaliser le procédé selon une des revendications 1-6, avec :
    - un mécanisme de dosage (10) et avec une sonde de mesure (12) reliée à un amplificateur de valeur de mesure (14), ainsi qu'avec un limiteur de temps de dosage (22),
    - tandis que le dispositif de commande et de régulation (13) commande le déroulement dans le temps de la phase de démarrage et de la phase de lavage et sert pour la commande de l'amenée du produit de nettoyage dans la phase de démarrage ainsi que pour le maintien de la constance de la concentration du produit de lavage, dans la phase de lavage,
       caractérisé en ce que :
       le dispositif de commande et de régulation (13) peut être branché au moyen de commutateurs de sélection (17, 18) dans le mode de lavage de base et dans le cycle normal, tandis que l'amplificateur de valeur de mesure (14) peut être commuté dans un plus grand et dans un plus petit niveau de mesure avec les commutateurs de sélection (17, 18) et le limiteur de temps de dosage (22) peut être déconnecté pendant le cycle de lavage de base.
EP92919612A 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 Revoked EP0605507B1 (fr)

Applications Claiming Priority (3)

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
DE4132306 1991-09-27
PCT/EP1992/002160 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

Publications (2)

Publication Number Publication Date
EP0605507A1 EP0605507A1 (fr) 1994-07-13
EP0605507B1 true EP0605507B1 (fr) 1996-07-03

Family

ID=6441682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92919612A Revoked 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

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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09509073A (ja) * 1993-11-20 1997-09-16 ユニレフェール ナムローゼ フェンノートシャップ 機械皿洗い方法
DE19652733C2 (de) * 1996-12-18 2001-03-01 Lang App Bau Gmbh Dosierverfahren zum Zuführen eines Reinigers zu einer Geschirrspülmaschine
US8092613B2 (en) 2002-05-31 2012-01-10 Ecolab Usa Inc. Methods and compositions for the removal of starch
ES2752079T3 (es) 2011-05-20 2020-04-02 Ecolab Usa Inc Formulaciones ácidas para uso en un sistema de lavado de utensilios
ES2750872T3 (es) 2011-12-13 2020-03-27 Ecolab Usa Inc Método de lavado de vajilla

Family Cites Families (5)

* 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
DE3938755A1 (de) * 1989-11-23 1991-05-29 Henkel Kgaa Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr

Also Published As

Publication number Publication date
DE59206716D1 (de) 1996-08-08
ES2088592T3 (es) 1996-08-16
EP0605507A1 (fr) 1994-07-13
ATE139891T1 (de) 1996-07-15
DK0605507T3 (da) 1996-11-04
WO1993005696A1 (fr) 1993-04-01
DE4132306A1 (de) 1993-04-08

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