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FR2577128A1 - Metering device, in particular for a continuously operating dishwashing machine, and device for its implementation - Google Patents

Metering device, in particular for a continuously operating dishwashing machine, and device for its implementation Download PDF

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Publication number
FR2577128A1
FR2577128A1 FR8501877A FR8501877A FR2577128A1 FR 2577128 A1 FR2577128 A1 FR 2577128A1 FR 8501877 A FR8501877 A FR 8501877A FR 8501877 A FR8501877 A FR 8501877A FR 2577128 A1 FR2577128 A1 FR 2577128A1
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France
Prior art keywords
detergent
pump
washing
bath
implementation
Prior art date
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Granted
Application number
FR8501877A
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French (fr)
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FR2577128B1 (en
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LAGRANDIERE MARC
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LAGRANDIERE MARC
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Publication date
Application filed by LAGRANDIERE MARC filed Critical LAGRANDIERE MARC
Priority to FR8501877A priority Critical patent/FR2577128B1/en
Publication of FR2577128A1 publication Critical patent/FR2577128A1/en
Application granted granted Critical
Publication of FR2577128B1 publication Critical patent/FR2577128B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/44Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4418Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids

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  • Cleaning By Liquid Or Steam (AREA)

Abstract

Process and device for metering detergents in a washing bath, in particular for dishwashing machines operating continuously. According to the present invention, the process consists in introducing the detergent in a continuous fashion during the whole washing cycle, during filling up or during rinsing without taking into account the indications of a sensor. Applications: saving on detergents and improvement in washing efficiency.

Description

PROCEDE DE DOSAGE NOTAMMENT POUR MACHINE A LAVER LA
VAISSELLE EN CONTINU ET DISPOSITIF DE MISE EN OEUVRE.
DOSING PROCESS, PARTICULARLY FOR A WASHING MACHINE
CONTINUOUS DISHWASHING AND IMPLEMENTING DEVICE.

La présente invention a pour objet un procédé de dosage des produits lessiviels destiné en particulier, mais non exclusivement, aux machines à laver la vaisselle de type professionnel, c'est à dire fonctionnant en continu, ainsi qu'un dispositif de mise en oeuvre du procédé.The subject of the present invention is a method for dosing detergents intended in particular, but not exclusively, for professional type dishwashing machines, that is to say operating continuously, as well as a device for implementing the process.

Dans l'état actuel de la technique, les produits liquides de lavage pour machines à laver la vaisselle en continu, celle-ci étant disposée sur des convoyeurs sont dosés par l'intermédiaire d'une sonde placée dans un bain de lavage, laquelle constitue une branche d'un pont de Weasthone. Ce pont, au déséquilibre, excite soit une pompe soit une électrovanne associée à un venturi, qui envoient du produit de lavage sur le dessus du bain jusqu'à ce que l'équilibre du pont soit à nouveau rétabli. La sonde n'étant pas capable de discerner la nature des variations de conductivité qu'elle mesure, le pont trouvera son équilibre soit par incorporation de lessive supplémentaire, mais aussi par l'augmentation de la proportion de souillures dans la solution tombant de la vaisselle en continu.In the current state of the art, the liquid detergents for continuous dishwashing machines, the latter being arranged on conveyors, are metered by means of a probe placed in a washing bath, which constitutes a branch of a Weasthone bridge. This bridge, at imbalance, excites either a pump or a solenoid valve associated with a venturi, which send washing product on the top of the bath until the balance of the bridge is again restored. The probe not being able to discern the nature of the variations in conductivity that it measures, the bridge will find its balance either by incorporation of additional detergent, but also by the increase in the proportion of stains in the solution falling from the dishes continuously.

La Fig.1 représente les courbes de l'évolution, en fonction du temps, de concentrations moyennes des produits de lavage 1 et des souillures 2 dans le bain de lavage . Si le pic de la courbe 1 correspond à une concentration de' 3g./litre de lessive, au point de croisement des courbes 1 et 2, la concentration n'est plus que de 1,5 g./l pour la lessive et équivalent à 1,5 g/l pour les souillures. Au bout de quatre heures, la concentration en lessive n'est plus que de lg/l.Fig. 1 represents the curves of the evolution, as a function of time, of average concentrations of the washing products 1 and of the soiling 2 in the washing bath. If the peak of curve 1 corresponds to a concentration of '3g./liter of detergent, at the crossing point of curves 1 and 2, the concentration is only 1.5 g./l for detergent and equivalent 1.5 g / l for soiling. After four hours, the detergent concentration is no more than lg / l.

C'est à dire que plus le bain de lessive est souillé, plus la concentration en lessive est faible. La concentration en lessive est maximum au début du lavage (eau propre) et minimum en fin de lavage (eau très souillée). This means that the more soiled the detergent bath, the lower the concentration of detergent. The concentration of detergent is maximum at the start of washing (clean water) and minimum at the end of washing (very soiled water).

A l'évidence, le procédé employé va à l'encontre des résultats souhaités à savoir que la concentration en lessive doit être d'autant plus importante que le bain est plus souillé.Obviously, the process used goes against the desired results, namely that the concentration of detergent must be all the greater the more the bath is soiled.

La présente invention a pour objet de pallier cet inconvénient et de permettre l'obtention d'une concentration de produit de lavage proportionnelle à la concentration des souillures dans le bain.The object of the present invention is to overcome this drawback and to allow a concentration of detergent to be obtained proportional to the concentration of soils in the bath.

Selon la présente invention, le procédé de dosage de la lessive dans un bain est caractérisé en ce que l'introduction de la lessive est effectuée en continu tout au long d'un cycle de lavage, de remplissage ou de rinçage.According to the present invention, the method for dosing the detergent into a bath is characterized in that the introduction of the detergent is carried out continuously throughout a washing, filling or rinsing cycle.

Ainsi, la quantité de lessive peut être rendue proportionnelle à la concentration de souillures dans le bain de lavage ce qui permet d'utiliser rationnellement les produits lessiviels et, par suite, de réaliser des économies substantielles tout en obtenant une qualité de nettoyage supérieure.Thus, the quantity of detergent can be made proportional to the concentration of soils in the washing bath, which makes it possible to use the detergents rationally and, consequently, to make substantial savings while obtaining a higher quality of cleaning.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description qui va suivre de modes particuliers de réalisation, donnés uniquement à titre d'exemple non limitatif, en regard des dessins qui représentent: - La Fig.1, les courbes d'évolution des concentrations en lessive et en souillures dans la technique antérieure.Other characteristics and advantages of the present invention will appear during the following description of particular embodiments, given solely by way of nonlimiting example, with reference to the drawings which represent: - Fig.1, the curves evolution of the concentrations of lye and soils in the prior art.

- La Fig.2,' les mêmes courbes dans le procédé selon l'invention; - La Fig.3, un schéma d'un dispositif de mise en oeuvre du procédé.- Fig.2, 'the same curves in the method according to the invention; - Fig.3, a diagram of a device for implementing the method.

On voit sur la Fig.2 que la courbe 1 de concentration du bain en lessive croit progressivement et est parallèle à la courbe de concentration du bain en souillures. Il est ainsi possible de réaliser des économies pouvant atteindre jusqu'à 50% du coût des produits lessiviels. It can be seen in FIG. 2 that the curve 1 of concentration of the bath in detergent gradually increases and is parallel to the curve of concentration of the bath in stains. Savings can be made of up to 50% of the cost of detergents.

Le dispositif représenté schématiquement sur la Fig.3 comporte une pompe 5 qui aspire la solution de lessive contenue dans la réserve 6. Il peut sragir d'une pompe de type péristaltique à débit réglable qui renvoie la solution pompée soit dans la pompe 3 de lavage de la machine ou encore au-dessus du bain ( disposition symbolisée par la flèche 4.The device shown diagrammatically in FIG. 3 comprises a pump 5 which sucks the detergent solution contained in the reserve 6. It can be a peristaltic type pump with adjustable flow rate which returns the solution pumped either to the washing pump 3 machine or above the bath (arrangement symbolized by arrow 4.

La pompe 5 peut fonctionner simultanément à l'électrovanne 7 d'eau de rinçage, soit être commandée par un pressostat 8 disposé sur le tuyau de rin-çage,soit encore sur au moins l'un des autres organes 9 de la machine tels que contacteurs etc
C'est à dire que de la lessive sera introduite dans le bain, tout au long du cycle de lavage, chaque fois que l'organe considéré sera en fonctionnement, la quantité- de lessive introduite étant proportionnelle à la durée de fonctionnement de cet organe. C'est ainsi qu'en fonction de l'organe choisi pour commander le fonctionnement de la pompe 5, l'alimentation en lessive sera effectué tout au long du cycle de lavage si l'alimentation de la pompe en électricité est obtenue à travers un contacteur de la machine, tout au long du cycle de rinçage si l'alimentation de la pompe 5 est connectée à l'électrovanne de rinçage ou lors du remplissage et plus généralement pendant la durée de fonctionnement de l'organe de la machine choisi.
The pump 5 can operate simultaneously with the solenoid valve 7 for rinsing water, either be controlled by a pressure switch 8 disposed on the rinsing hose, or else on at least one of the other members 9 of the machine such as contactors etc
That is to say that detergent will be introduced into the bath, throughout the washing cycle, each time that the organ in question is in operation, the quantity of detergent introduced being proportional to the duration of operation of this organ. . Thus, depending on the member chosen to control the operation of the pump 5, the supply of detergent will be carried out throughout the washing cycle if the supply of electricity to the pump is obtained through a machine contactor, throughout the flushing cycle if the power to pump 5 is connected to the flushing solenoid valve or during filling and more generally during the operating time of the selected machine component.

Il va de soi que de nombreuses variantes peuvent être introduites, notamment par substitution de moyens techniquement équivalents sans sortir pour celà du cadre de 1' invention. It goes without saying that many variants can be introduced, in particular by substitution of technically equivalent means without departing from the scope of the invention.

Claims (4)

REVENDICATIONS 10 Procédé de dosage de la lessive dans un bain de lavage,10 Method for dosing the detergent in a washing bath, notamment pour machines à laver la vaisselle en continu, especially for continuous dishwashing machines, caractérisé en ce que l'introduction de la lessive est characterized in that the introduction of the detergent is effectuée en continu tout au long d'un cycle de lavage, de performed continuously throughout a wash cycle, from remplissage ou de rinçage. filling or rinsing. 20 Dispositif pour la mise en oeuvre du procédé selon la20 Device for implementing the method according to the revendication 1, caractérisé en ce qu'il comprend une claim 1, characterized in that it comprises a pompe (5) dont l'entrée est connectée à une réserve de pump (5) whose input is connected to a reserve of lessive (6) et dont la sortie est connectée au bain de detergent (6) and the outlet of which is connected to the lavage 30 Dispositif selon la revendication 2, caractérisé en ce que washing 30 Device according to claim 2, characterized in that la sortie de la pompe 5 est connectée l'aspiration de la the output of pump 5 is connected to the suction of the pompe (3) de lavage de la machine. washing machine pump (3). 40 Dispositif selon l'une des revendications 2 ou 3, 40 Device according to one of claims 2 or 3, caractérisé en ce que l'alimentation de la pompe (5) est characterized in that the supply to the pump (5) is effectuée par l'intermédiaire de l'électrovanne de rinçage performed via the flushing solenoid valve (7) 50 Dispositif selon l'une des revendications 2 ou 3, (7) 50 Device according to one of claims 2 or 3, caractérisé en ce que l'alimentation de la pompe (5) est characterized in that the supply to the pump (5) is réalisée par l'intermédiaire d'un pressostat (8) disposé produced by means of a pressure switch (8) arranged sur le tuyau de rinçage. on the flushing hose. 60 Dispositif selon l'une des revendications 2 ou 3,60 Device according to one of claims 2 or 3, caractérisé en ce l'alimentation de la pompe (5) est characterized in that the supply to the pump (5) is réalisée par l'intermédaire d'un contacteur (9) de la carried out through a contactor (9) of the machine.  machine.
FR8501877A 1985-02-11 1985-02-11 DOSING PROCESS, PARTICULARLY FOR A CONTINUOUS DISHWASHER WASHING MACHINE AND IMPLEMENTING DEVICE Expired - Fee Related FR2577128B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8501877A FR2577128B1 (en) 1985-02-11 1985-02-11 DOSING PROCESS, PARTICULARLY FOR A CONTINUOUS DISHWASHER WASHING MACHINE AND IMPLEMENTING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8501877A FR2577128B1 (en) 1985-02-11 1985-02-11 DOSING PROCESS, PARTICULARLY FOR A CONTINUOUS DISHWASHER WASHING MACHINE AND IMPLEMENTING DEVICE

Publications (2)

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FR2577128A1 true FR2577128A1 (en) 1986-08-14
FR2577128B1 FR2577128B1 (en) 1990-07-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056542A (en) * 1990-02-28 1991-10-15 Kay Chemical Company Apparatus for dispensing detergent in a warewash machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197382A (en) * 1938-02-15 1940-04-16 Eugene V Myers Dishwashing machine
US3478757A (en) * 1968-02-12 1969-11-18 American Dish Service Automatic detergent,rinse additive and sterilizer dispenser for dishwashers
US3680784A (en) * 1971-01-27 1972-08-01 Auto Chlor System Detergent and wetting agent dispenser for dishwashing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197382A (en) * 1938-02-15 1940-04-16 Eugene V Myers Dishwashing machine
US3478757A (en) * 1968-02-12 1969-11-18 American Dish Service Automatic detergent,rinse additive and sterilizer dispenser for dishwashers
US3680784A (en) * 1971-01-27 1972-08-01 Auto Chlor System Detergent and wetting agent dispenser for dishwashing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056542A (en) * 1990-02-28 1991-10-15 Kay Chemical Company Apparatus for dispensing detergent in a warewash machine

Also Published As

Publication number Publication date
FR2577128B1 (en) 1990-07-06

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