EP0494885A1 - Gewerbliche geschirrspülmaschine. - Google Patents
Gewerbliche geschirrspülmaschine.Info
- Publication number
- EP0494885A1 EP0494885A1 EP90913809A EP90913809A EP0494885A1 EP 0494885 A1 EP0494885 A1 EP 0494885A1 EP 90913809 A EP90913809 A EP 90913809A EP 90913809 A EP90913809 A EP 90913809A EP 0494885 A1 EP0494885 A1 EP 0494885A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- cleaning solution
- metering
- metering tank
- 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.)
- Granted
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
- A47L15/0018—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 in a washing zone over the wash ware and through a catch pan with the help of a pump circulation to a highly concentrated detergent solution relative to the rinse water.
- washware or “dishes” is understood to mean all objects to be cleaned in the dishwasher, in particular plates, cups, cutlery and the like. While normal rinse water should contain about 2 to 6 g of detergent per lite of water, one speaks of a "highly concentrated" detergent solution if the amount 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 tape, by successive different Zones, in particular a clearing zone, a washing zone and a rinsing zone, promoted.
- a method for washing used 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 detergent solution which is fed in a separate circuit.
- the detergent solution draining from the items to be washed flows into a collecting trough and from there to an external collecting tank or base liquor container, which is followed by a circulation pump which supplies the circuit of the detergent solution.
- the detergent solution is temporarily stored in the circuit in the base liquor container.
- concentration and the amount of the cleaning solution in the circuit are also supplemented in a controlled manner. This requires sensors and corresponding supply lines for fresh water and detergent concentrate.
- the invention has for its object to provide a commercial dishwasher in which the detergent solution in the washing zone in a highly concentrated form in a circuit with a pump-spray system, that is in a Ummélzver ⁇ process 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, that is, we would: strive to get by without an external GGSM collecting tank.
- the solution according to the invention is for the above-mentioned commercial dishwasher with one over the wash ware and a collecting pan leading circuit a highly concentrated detergent solution characterized by egg level regulation of the collecting pan consisting of a latter permeable, sieve-like effective passage a dosing tank holding the rinsing water and by a dosing pump controlling concentration control of the detergent solution integrated in the circuit.
- a highly concentrated detergent solution characterized by egg level regulation of the collecting pan consisting of a latter permeable, sieve-like effective passage a dosing tank holding the rinsing water and by a dosing pump controlling concentration control of the detergent solution integrated in the circuit.
- the term "It refers to an automatic drainage lock on a dike by the sea. The river opens and closes in time rhythm solely through the action of ebb and flow during high tide, the rising tide presses the lock z at low tide (low tide) Land dammed up the siel.
- connection according to the invention which is permeable only in one direction, permits the supply of normal d-washing liquid into the collecting trough, but not the reflux of the highly concentrated cleaning solution into the dosing tank.
- a certain leakage in the direction of the dosing tank can also be tolerated, as can the inflow of detergent solution that splashes over the dishwashing liquid, because this almost eliminates the existing need for cleaning agents in the dosing tank can be .
- the concentration of normal dosed rinse water in alkali cleaners is of the order of 3 g of alkali per liter of water.
- the alkali solution is highly concentrated when it is of the order of magnitude ten times as concentrated as the rinsing water, that is to say 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 measure of the detergent concentration can be essential in the area of the highly concentrated detergent solution if alkali-sensitive wash ware is to be treated.
- 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 maintained within certain tolerances by conductivity control. Therefore, according to a further invention, a dosing pump with a conductivity regulator is assigned to the circuit of the cleaning solution.
- the circuit of the highly concentrated cleaning solution should not only have its own circulation pump but also its own metering device with conductivity control, which 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 pan and dosing tank next to each other and to provide the passage in a common partition. watch. This would require considerable additional space and a corresponding redesign of the machine. According to a further invention, this problem of space is solved if the collecting trough is designed as a built-in tank for the metering tank. This built-in tank should then have its own circulation pump, its own spray register and its own metering device with conductivity control.
- the aforementioned installation solution also simplifies the process in that it is only necessary for the connection that is permeable in one direction only, an opening with a like in a partition between the metering tank and the collecting trough at about the desired height of the level of the cleaning solution to 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 to say without any forced control.
- the collecting trough is placed in the metering tank as a built-in tank, it is particularly advantageous according to yet another invention to provide the built-in tank with a catch screen that spans essentially the area under the washware to be sprayed assign in order to ensure that as little sprayed, highly concentrated cleaning solution as possible gets into the metering tank and is diluted prematurely.
- the shielding need not be driven so far that no components of the cleaning solution can get into the metering tank at all, because the outflow of a small part of the concentrate into the metering tank helps to maintain the concentration there.
- the dishes 3, z. B. plate in the direction perpendicular to the plane of the drawing on a conveyor belt 4 with the help of casters 5 and moves from above from spray nozzle 6 and from below spray nozzles 7 with detergent solution.
- the upper spray nozzles 6 spray cleaning solution conveyed via a line, for example in spray cones 9 shown in broken lines, from about 60 ° C. onto the flushing agent 3.
- the lower spray nozzles 7 spray the cleaning solution 11 supplied via a line 1, for example into Spritzke S-An 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 which has an electrical feed line 16.
- the supply of the lines 8 and 10 a conductivity flow measuring cell 17 is assigned, which has an electrical connection 18 and controls a metering pump 1 with an electrical connection 20.
- the metering pump 19 has a line 21, in particular thread-reinforced PVC hose, to a cleaning container (not shown) and a metering hose 22 , e.g. made of PVC, which ends within the built-in tanks 15.
- a predetermined level 23 is maintained in the built-in tank 15.
- hold level 23 is approximately in the range of the height of a Siel or check valve 24, which closes or leaves an opening 25 in the wall 26 of the built-in tank 15 - depending on the level 23 level.
- 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 such that it can only open the non-return flap 24 if the level 23 within the built-in tank 15 drops below a minimum level.
- non-return flap 24 is mounted so as to be pivotable 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 established (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 meter (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 must be conveyed in the circuit and therefore at a temperature of e.g. B. 50 to 60 "C, which is adapted to the temperature of the already warmed items.
- This temperature-controlled mode of operation means a higher cleaning performance and also avoids sudden cooling of the already warmed items.
- Commercial dishwashers usually have several tanks, e.g. B. a tank assigned to the clearing zone, de fresh water or water weakly dosed with detergent, a metering tank with i essential three grams of detergent per liter of water in the washing zone and finally a substantially pure washing tank containing water in a washing zone.
- the wash ware should be cleared beforehand if it reaches the washing zone equipped according to the invention.
- the device with the circuit de detergent solution should be arranged in front of the clear wash tank
- the dishwasher and the pump / spray circuit according to the invention are supplied as follows: after the dishwasher has been filled, the metering is carried out normally tanks 27 - as usual - via the normal conductivity metering regulator. At the same time, 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. In the further rinsing process, 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 built-in 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 cleaner from the sprayed solution of the spray nozzles 6, 7 predominates, then 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, for example, 3 grams per liter), an unacceptable carryover of alkali, that is to say overloading of the wash ware 3 with detergent, is not to be feared, since after the washing zone 2 with a metering tank 27 a clear wash tank with undosed fresh water follows. Larger, possibly still adhering amounts of detergent are reliably rinsed off here.
- the intended setpoint e.g. B. 3 grams per liter
Landscapes
- Washing And Drying Of Tableware (AREA)
- Table Devices Or Equipment (AREA)
- Power Steering Mechanism (AREA)
- Lubricants (AREA)
- Glass Compositions (AREA)
- Detergent Compositions (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3932806 | 1989-09-30 | ||
DE3932806A DE3932806A1 (de) | 1989-09-30 | 1989-09-30 | Gewerbliche geschirrspuelmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0494885A1 true EP0494885A1 (de) | 1992-07-22 |
EP0494885B1 EP0494885B1 (de) | 1994-02-16 |
Family
ID=6390639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90913809A Expired - Lifetime EP0494885B1 (de) | 1989-09-30 | 1990-09-22 | Gewerbliche geschirrspülmaschine |
Country Status (9)
Country | Link |
---|---|
US (1) | US5240019A (de) |
EP (1) | EP0494885B1 (de) |
JP (1) | JPH05500463A (de) |
AT (1) | ATE101504T1 (de) |
DE (2) | DE3932806A1 (de) |
DK (1) | DK0494885T3 (de) |
ES (1) | ES2049046T3 (de) |
FI (1) | FI95099C (de) |
WO (1) | WO1991004702A1 (de) |
Families Citing this family (5)
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 |
DE102008042655A1 (de) * | 2008-10-07 | 2010-04-08 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltsgerät mit einem automatischen Dosiersystem sowie Verfahren zum automatischen Dosieren |
Family Cites Families (13)
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 |
-
1989
- 1989-09-30 DE DE3932806A patent/DE3932806A1/de active Granted
-
1990
- 1990-09-22 DK DK90913809.1T patent/DK0494885T3/da active
- 1990-09-22 WO PCT/EP1990/001613 patent/WO1991004702A1/de active IP Right Grant
- 1990-09-22 JP JP2512861A patent/JPH05500463A/ja active Pending
- 1990-09-22 US US07/842,414 patent/US5240019A/en not_active Expired - Fee Related
- 1990-09-22 DE DE90913809T patent/DE59004638D1/de not_active Expired - Fee Related
- 1990-09-22 EP EP90913809A patent/EP0494885B1/de not_active Expired - Lifetime
- 1990-09-22 ES ES90913809T patent/ES2049046T3/es not_active Expired - Lifetime
- 1990-09-22 AT AT90913809T patent/ATE101504T1/de not_active IP Right Cessation
-
1992
- 1992-03-27 FI FI921370A patent/FI95099C/fi active
Non-Patent Citations (1)
Title |
---|
See references of WO9104702A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK0494885T3 (da) | 1994-07-18 |
ES2049046T3 (es) | 1994-04-01 |
FI95099C (fi) | 1995-12-27 |
FI921370A0 (fi) | 1992-03-27 |
US5240019A (en) | 1993-08-31 |
FI921370A (fi) | 1992-03-27 |
EP0494885B1 (de) | 1994-02-16 |
DE59004638D1 (de) | 1994-03-24 |
FI95099B (fi) | 1995-09-15 |
WO1991004702A1 (de) | 1991-04-18 |
DE3932806C2 (de) | 1991-09-26 |
DE3932806A1 (de) | 1991-04-11 |
ATE101504T1 (de) | 1994-03-15 |
JPH05500463A (ja) | 1993-02-04 |
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