EP0494885B1 - Machine industrielle a laver la vaiselle - Google Patents

Machine industrielle a laver la vaiselle Download PDF

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Publication number
EP0494885B1
EP0494885B1 EP90913809A EP90913809A EP0494885B1 EP 0494885 B1 EP0494885 B1 EP 0494885B1 EP 90913809 A EP90913809 A EP 90913809A EP 90913809 A EP90913809 A EP 90913809A EP 0494885 B1 EP0494885 B1 EP 0494885B1
Authority
EP
European Patent Office
Prior art keywords
tank
metering tank
metering
cleaning solution
level
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.)
Expired - Lifetime
Application number
EP90913809A
Other languages
German (de)
English (en)
Other versions
EP0494885A1 (fr
Inventor
Friedel Rings
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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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6390639&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0494885(B1) "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
Publication of EP0494885A1 publication Critical patent/EP0494885A1/fr
Application granted granted Critical
Publication of EP0494885B1 publication Critical patent/EP0494885B1/fr
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
    • 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
    • A47L15/245—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane the dishes being placed directly on the conveyors, i.e. not in dish racks
    • 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 commercial dishwasher with a circulation of a cleaning solution which is highly concentrated in relation to the washing water, in a washing zone above the items to be washed and through a collecting trough with the aid of a pump.
  • wash ware or “dishes” is understood to mean all objects to be cleaned in dishwashers, in particular plates, cups, cutlery and the like. While normal rinse water should contain about 2 to 6 g of detergent per liter of water, one speaks of a "highly concentrated" detergent solution if the proportion of detergent is of the order of 30 to 80 g per liter of water. In commercial dishwashers - GGSM for short - the dishes, e.g. B. on a belt, through different successive zones, in particular a clearing zone, a washing zone and a rinse zone.
  • a method for washing dishes in a dishwasher having a washing zone has already been proposed, in which the prewashed items to be washed in the washing zone are treated with a highly concentrated cleaning solution which is conveyed in a separate circuit.
  • the detergent solution draining from the washware flows into a collecting trough and from there to an external collecting tank or main suds container, which is a circulation pump that supplies the circuit of the detergent solution is connected downstream.
  • the detergent solution is temporarily stored in the circuit in the base liquor container.
  • the concentration and the amount of the cleaning solution in the circuit are also supplemented there in a controlled manner. This requires sensors and corresponding supply lines for fresh water and cleaner concentrate.
  • the invention has for its object to provide a commercial dishwasher in which the cleaning solution in the washing zone in a highly concentrated form in a circuit with a pump-spray system, i.e. in a circulation process in parallel to the normal washing process, is promoted without a controlled control system to compensate for the amount of liquid lost from the circuit when spraying the wash ware, d. H. the aim is to get by without an external GGSM collection tank.
  • the solution according to the invention is for the above-mentioned commercial dishwasher with one over the wash ware and one Cycle of a highly concentrated detergent solution leading to the collecting pan characterized by level regulation of the collecting pan, consisting of a passage that is permeable to the latter, with a non-return cap, to a metering tank that holds the rinsing water, and a concentration control of the detergent solution that is integrated in the circuit and controls a metering pump.
  • a connection acting like a filter is provided between the metering tank holding the normally dosed rinsing water and the collecting trough receiving the highly concentrated detergent solution, rinsing water flows from the metering tank into the collecting trough as long as a predetermined minimum level is not exceeded in the latter. If, on the other hand, the liquid level in the drip pan rises above a predetermined level, the passage which looks like a sieve is closed by the pressure of the cleaning solution.
  • the term "Siel” refers to an automatic drainage lock in a dike by the sea.
  • connection which according to the invention is only permeable in one direction, permits the supply of normally metered washing liquid into the collecting trough, but not the reflux of the highly concentrated cleaning solution into the metering tank.
  • a certain amount of leakage in the direction of the metering tank can be tolerated, as can the inflow of detergent solution that splashes over the wash ware, because this can approximately cover the detergent requirement of the metering tank that is also present.
  • the target concentration of normally dosed rinsing water for alkali cleaners is of the order of 3 g alkali per liter of water.
  • the alkali solution is highly concentrated when it is on the order of ten times as concentrated as the rinse water, i.e. it contains about 30 to 50 g of alkali per liter of water.
  • the extent of the concentration can be varied within wide limits, so even with 6 to 8 g of alkali per liter of water, one speaks of normal concentration.
  • the level of detergent concentration in the area of the highly concentrated detergent solution can be essential if items to be washed are sensitive to alkali.
  • the concentration should be high for a good cleaning effect, and the concentration should be low to avoid damaging the items to be treated.
  • an optimal value determined by testing is selected and adhered to within certain tolerances by conductivity control. Therefore, according to a further invention, the circuit of the circuit of the cleaning solution is assigned a metering pump with a conductivity regulator.
  • the circuit of the highly concentrated cleaning solution should therefore not only have its own circulation pump but also its own metering device with conductivity control that is independent of the concentration control of the metering tank.
  • a connection which is essentially permeable only in the direction of the collecting trough is to be provided between the metering tank and the collecting trough. It would therefore be obvious to arrange the collecting tray and dosing tank next to each other and to provide the passage in a common partition. This would require considerable additional space and a corresponding redesign of the machine. According to another invention, this is Space problem solved if the drip pan is designed as a built-in tank for the dosing tank. This built-in tank should then have its own circulation pump, its own spray register and its own metering device, possibly with conductivity control.
  • the aforementioned installation solution also simplifies the process in that it is only necessary for the connection which is permeable in one direction only, in a partition wall between the metering tank and the collecting trough, at about the desired height of the level of the cleaning solution, such as Provide a non-return valve. Any electronics or electrics are then not required for the level control. Rather, the level control works naturally, that is, without any forced control.
  • the collecting trough is placed as a built-in tank in the metering tank, it is particularly advantageous according to yet another invention to assign the built-in tank a collecting screen that spans essentially the area under the wash items to be sprayed, in order to ensure that as little as possible sprayed, highly concentrated detergent solution in the Dosing tank arrives and is diluted prematurely.
  • the shielding does not need to be driven so far that no components of the cleaning solution in the Dosing tank can get because the outflow of a small part of the concentrate in the dosing tank contributes to the maintenance of the concentration there.
  • the wash ware 3, for. B. plate in the direction perpendicular to the plane of the drawing on a conveyor belt 4 with the help of rollers 5 and thereby treated from above from spray nozzles 6 and from below spray nozzles 7 with cleaning solution.
  • the upper spray nozzles 6 spray cleaning solution conveyed via a line 8, for example in spray cones 9 shown in dashed lines from approximately 60 ° C. onto the wash ware 3.
  • the lower spray nozzles 7 spray the cleaning solution 11 supplied via a line 10, for example in spray cones 12 of approximately 110 ° C. in the direction of the items to be washed 3.
  • the lines 8 and 10 are supplied via a hose 13 by a submersible pump 14 which rests in a built-in tank 15 which holds the cleaning solution 11 and has an electrical supply line 16.
  • the supply of lines 8 and 10 is assigned a conductivity flow measuring cell 17, which has an electrical connection 18 and controls a metering pump 19 with electrical connection 20.
  • the metering pump 19 has a line 21, in particular thread-reinforced PVC hose, to a detergent container, not shown, and a metering hose 22, for. B. made of PVC, which ends within the built-in tank 15.
  • a predetermined level 23 is maintained in the built-in tank 15.
  • Level 23 is approximately in the range of the height of a flap or non-return valve 24, which closes or leaves an opening 25 in the wall 26 of the built-in tank 15, depending on the level 23.
  • the built-in tank 15 is located within a conventional metering tank 27 of the dishwasher.
  • the liquid level 28 in the metering tank 27 is set so that it can only open the non-return valve 24 if the level 23 within the built-in tank 15 drops below a minimum level.
  • the non-return flap 24 is pivotably mounted about an approximately horizontal axis 29 and if the free end 30 of the flap 24 can rest against the inner surface of the wall 26 of the built-in tank 15 over a certain distance.
  • the level 28 in the metering tank 27 is set (as is generally the case) via an overflow weir to the previous tank (cascade principle).
  • the cleaning agent concentration in the metering tank 27 can - likewise as usual - be maintained via a conductivity metering regulator (not shown).
  • more or less large collars acting as a collecting plate 31 can be provided at the edge of the built-in tank 15.
  • a major advantage of the circuit of the cleaning solution stabilized according to the invention is that the cleaning solution is not supplied from a fresh water reservoir, that is to say is usually cold, but is to be conveyed in the circuit and therefore at a temperature of, for. B. can work 50 to 60 ° C, which is adapted to the temperature of the already heated dishes.
  • This temperature-controlled mode of operation means a higher cleaning performance and also avoids sudden cooling of the already warmed items.
  • the optimal installation is preferably the penultimate tank of a commercial dishwasher.
  • the tank containing the concentrated cleaning solution is to be installed in the metering tank.
  • the dishwasher and the pump-spray circuit according to the invention are supplied as follows: after the dishwasher has been filled, the metering tank is normally dosed 27 - as usual - via the normal conductivity dosing regulator.
  • the conductivity-flow measuring cell 17, which is unique to the pump-spray circuit ensures that the built-in tank 15 is dosed to a predetermined high value, for example 30 to 80 g of alkali per liter of water.
  • the detergent supply of the metering tank 27 takes place predominantly from liquid of the spray nozzles 6 and 7 that is sprayed past the installation tank 15.
  • the associated conductivity regulator occasionally responds in order to achieve the intended setpoint, e.g. B. 3 grams per liter. If the amount of detergent from the sprayed solution of the spray nozzles 6, 7 predominates, an equilibrium concentration gradually sets in in the metering tank 27, but even at high equilibrium concentrations (e.g. 10 grams per liter instead of a target concentration of e.g. 3 grams per liter) there is no fear of an impermissible carry-over of alkali, i.e. overloading of the wash ware 3 with detergent, since after wash zone 2 with metering tank 27 there is still a clear wash tank with undosed fresh water. Larger, possibly still adhering amounts of detergent are reliably rinsed off here.
  • high equilibrium concentrations e.g. 10 grams per liter instead of a target concentration of e.g. 3 grams per liter

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Table Devices Or Equipment (AREA)
  • Power Steering Mechanism (AREA)
  • Detergent Compositions (AREA)
  • Glass Compositions (AREA)
  • Lubricants (AREA)

Claims (5)

  1. Machine industrielle à laver la vaisselle dans laquelle une solution de produit de nettoyage (11) très concentrée par rapport à l'eau de rinçage est mise en circulation dans une zone de lavage (2), à l'aide d'une pompe (14), suivant un circuit qui la fait passer sur la vaisselle (3) et par une cuve collectrice (15), cette machine étant caractérisée par le fait qu'elle comporte un dispositif de régulation du niveau de la cuve collectrice (15), constitué par un passage (25) menant vers cette cuve et pourvu d'un clapet anti-retour (24) en direction d'un réservoir de dosage (27) contenant l'eau de rinçage, ainsi qu'un dispositif de réglage (17, 19) de la concentration de la solution de produit de nettoyage (11), situé dans le circuit et commandant une pompe de dosage (19).
  2. Machine à laver la vaisselle selon la revendication 1, caractérisée par le fait que, dans une paroi de séparation (26) du réservoir de dosage (27) et de la cuve collectrice (15), à peu près à la hauteur théorique du niveau de la solution de produit de nettoyage (11), le passage (25) est pourvu du clapet (24) qui agit comme une vanne.
  3. Machine à laver la vaisselle selon l'une ou l'autre des revendications 1 ou 2, caractérisée par le fait que la pompe de dosage (19) prévue dans le circuit de la solution de produit de nettoyage (11) est pourvue d'un régulateur de conductibilité (17).
  4. Machine à laver la vaisselle selon l'une quelconque des revendications 1 à 3, caractérisée par le fait que la cuve collectrice est constituée par un réservoir incorporé (15) dans le réservoir de dosage (27).
  5. Machine à laver la vaisselle selon la revendication 4, caractérisée par le fait qu'un écran collecteur (31) recouvrant sensiblement la zone située sous la vaisselle (3) à asperger, est adjoint au réservoir incorporé (15) ou cuve collectrice.
EP90913809A 1989-09-30 1990-09-22 Machine industrielle a laver la vaiselle Expired - Lifetime EP0494885B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932806A DE3932806A1 (de) 1989-09-30 1989-09-30 Gewerbliche geschirrspuelmaschine
DE3932806 1989-09-30

Publications (2)

Publication Number Publication Date
EP0494885A1 EP0494885A1 (fr) 1992-07-22
EP0494885B1 true EP0494885B1 (fr) 1994-02-16

Family

ID=6390639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913809A Expired - Lifetime EP0494885B1 (fr) 1989-09-30 1990-09-22 Machine industrielle a laver la vaiselle

Country Status (9)

Country Link
US (1) US5240019A (fr)
EP (1) EP0494885B1 (fr)
JP (1) JPH05500463A (fr)
AT (1) ATE101504T1 (fr)
DE (2) DE3932806A1 (fr)
DK (1) DK0494885T3 (fr)
ES (1) ES2049046T3 (fr)
FI (1) FI95099C (fr)
WO (1) WO1991004702A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4310403C2 (de) * 1993-03-31 1997-07-31 Aeg Hausgeraete Gmbh Geschirrspülmaschine mit einem Spülbehälter
US5524357A (en) * 1994-12-23 1996-06-11 Eagle Vision, Inc. Instrument cleaner with converging steam jets
US5899215A (en) * 1996-04-26 1999-05-04 Ecolab Inc. Dishwasher with rinse diverter for reducing detergent consumption
DE19940645A1 (de) * 1999-08-26 2001-03-08 Henkel Ecolab Gmbh & Co Ohg Spülverfahren und Spülmaschine
DE202008017876U1 (de) * 2008-10-07 2010-09-23 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einem automatischen Dosiersystem

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH252114A (fr) * 1938-12-21 1947-12-15 Gangloff & Cie Societe A Respo Appareillage d'épuration continue d'un bain caustique pour laveuse automatique de bouteilles ou autres récipients.
US3139890A (en) * 1962-05-11 1964-07-07 Moran George Wenzel Dishwasher having means to inject liquid additive into the rinse water supply line
US3200835A (en) * 1962-08-01 1965-08-17 Grace W R & Co Chemical dissolving and dispensing means
US3144872A (en) * 1963-08-16 1964-08-18 Detrex Chem Ind Trough-type solvent washer
US3457929A (en) * 1966-12-02 1969-07-29 Whirlpool Co Dishwasher apparatus
AT284385B (de) * 1967-06-14 1970-09-10 Zanussi A Spa Industrie Wasserzulaufvorrichtung fuer waschmaschinen, insbesondere geschirrspuelmaschinen od. dgl
CH458648A (de) * 1967-06-30 1968-06-30 Bauknecht Gmbh G Geschirrspülmaschine mit Ablaufschacht
US3559889A (en) * 1969-05-07 1971-02-02 Gen Electric Dishwasher with improved means for reducing liquid carryover
US3896827A (en) * 1973-08-31 1975-07-29 Norman R Robinson Dish machine monitoring of time, temperature, alkalinity, and pressure parameters
US4190481A (en) * 1977-12-30 1980-02-26 Chemcut Corporation Apparatus for ion control of solutions
US4211517A (en) * 1978-11-27 1980-07-08 Bender Machine Works, Inc. Detergent supply control for automatic dishwasher
DE3707366A1 (de) * 1987-03-07 1988-09-15 Diversey Gmbh Verfahren zur kontinuierlichen oder diskontinuierlichen maschinellen reinigung von gebrauchsgeschirr
US4805649A (en) * 1987-10-30 1989-02-21 Perlick Corporation Beverage glass washer

Also Published As

Publication number Publication date
DK0494885T3 (da) 1994-07-18
DE3932806A1 (de) 1991-04-11
EP0494885A1 (fr) 1992-07-22
JPH05500463A (ja) 1993-02-04
US5240019A (en) 1993-08-31
FI95099B (fi) 1995-09-15
ATE101504T1 (de) 1994-03-15
WO1991004702A1 (fr) 1991-04-18
DE59004638D1 (de) 1994-03-24
FI921370A (fi) 1992-03-27
FI95099C (fi) 1995-12-27
FI921370A0 (fi) 1992-03-27
DE3932806C2 (fr) 1991-09-26
ES2049046T3 (es) 1994-04-01

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