EP0501996B1 - Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr - Google Patents

Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr Download PDF

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Publication number
EP0501996B1
EP0501996B1 EP90916716A EP90916716A EP0501996B1 EP 0501996 B1 EP0501996 B1 EP 0501996B1 EP 90916716 A EP90916716 A EP 90916716A EP 90916716 A EP90916716 A EP 90916716A EP 0501996 B1 EP0501996 B1 EP 0501996B1
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EP
European Patent Office
Prior art keywords
tank
last
fresh water
washing
part flow
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
EP90916716A
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German (de)
English (en)
French (fr)
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EP0501996A1 (de
Inventor
Günther Saalmann
Josef Selbertinger
Thomas Schuster
Udo Schaab
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
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Publication date
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Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT90916716T priority Critical patent/ATE101505T1/de
Publication of EP0501996A1 publication Critical patent/EP0501996A1/de
Application granted granted Critical
Publication of EP0501996B1 publication Critical patent/EP0501996B1/de
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    • 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

Definitions

  • the invention is directed to a process for the continuous machine cleaning of tableware in a commercial dishwasher with washing and subsequent rinsing zone, in which the dirty dishes are sprayed with washing liquor in succession in at least three washing zones fed from separate tanks by means of circulation pumps and spraying devices Overflow is cascaded, preferably from the last to the first tank, and the detergent concentration in the wash liquor in the individual tanks is initially set separately by pre-dosing and is maintained after the start of the cleaning process by re-dosing detergent and by supplying fresh water into the last tank and at which, if necessary, a so-called basic cleaning with a significantly increased detergent concentration in the wash liquor is carried out at larger intervals.
  • the object of the invention is to provide a solution which makes it possible to increase the cleaning performance of generic methods without increasing the total cleaner consumption without using extremely highly concentrated cleaning solutions.
  • this object is achieved according to the invention in that one of the last tank
  • the main part of the flow of washing liquor is branched off and fed directly to the third last and / or a tank ahead, which is more than 50%, preferably more than 75%, of the fresh water quantity flowing to the last tank, so that the remaining washing liquor as a secondary part of the flow, the tanks, at least from the middle and / or penultimate tank in a cascade-like manner, and that in the at least one middle and / or penultimate tank, a detergent concentration in the wash liquor, which is increased up to a maximum of the factor of the distribution ratio of fresh water quantity to secondary part flow quantity, is set, the replenishment taking place only in this tank.
  • the cleaner saved during a period of time can be used for a basic cleaning following this period of time with an increased concentration of cleaner.
  • the invention provides that a detergent concentration below the distribution ratio is set for a while and then the amount of detergent saved up to that point is metered in in a washing cycle with a significantly increased detergent concentration.
  • the distribution ratio is preferably set to values between 1 and 20, preferably between 3 and 10, as is further provided by the invention.
  • a particularly favorable supply of the required fresh water results from the fact that the amount of fresh water flowing into the last tank originates from the rinse zone.
  • the invention provides a further embodiment before that, when a level probe responds, fresh water is supplied to the last tank via a fresh water inlet, preferably having fan jet nozzles.
  • the invention has the advantageous further embodiment that the main part stream quantity is branched off at the riser pipe on the pressure side of the circulation pump of the last tank and the secondary part stream quantity cascading out from the last tank goes through.
  • Another embodiment of the invention provides that the secondary partial flow on the riser on the pressure side of the circulation pump of the last tank is branched off and fed to the middle and / or penultimate tank and the main partial flow is bypassed from the last tank to the third last and / or a tank further forward to be led.
  • the method according to the invention is characterized in that the distribution ratio is regulated by the setting of the main partial flow quantity and the actuating variables are defined as the cycle ratio of the metering device in the middle and / or penultimate tank and / or the frequency of the metering device, which is defined as the operating time of the metering device at the break time of the metering device Response of the serve fresh water supply.
  • the installation ratio can be set and controlled automatically and the process can be carried out with a constant concentration.
  • FIG. 1 schematically shows a commercial dishwasher designated overall by 1.
  • the dishes are placed on the dishwasher inlet 2 on this dishwasher and the dishes pass through the dishwasher 1 in the direction of arrow 3 during operation.
  • the dishwasher has washing zones 4, 5 and 6, of which the washing zone 4 is also referred to as a pump clearing zone.
  • the rinsing or rinsing zone 7 adjoins the washing zone 6.
  • Each of the washing zones 4, 5 and 6 includes a tank 8, 9 or 10, from which the washing liquor located in the respective tank is supplied by means of circulation pumps 11, 12, 13 in each case spray devices 14, 15 and 16.
  • the tank 8 is also referred to below as the first or third last tank, the tank 9 as the middle or penultimate tank and the tank 10 as the last tank in the following and in the entire application text.
  • the spray devices 14, 15 and 16 the washing liquor is sprayed onto the dishes from below and above onto the dishes during their passage through the dishwasher 1.
  • the dishes are sprayed with fresh water by means of a spray device 17.
  • the sprayed here The quantity of fresh water represents the quantity of fresh water flowing into the dishwasher 1 and reaches the tank 10. From the tank 10 there is a cascade-like overflow 18 to the tank 9 and from there a cascade-like overflow 19 to the tank 8.
  • Each of the tanks 8, 9 and 10 preferably points a connection, not shown, for the introduction of cleaner, the tanks 9 and 10 each additionally having a conductivity measuring device, which are also not shown in detail. These components, not shown, are already known from conventional dishwashers.
  • the last tank 10 also has a level electrode or probe 20.
  • a further fresh water supply 21 with fan jet nozzles is provided in the last washing zone 16. This fresh water supply can also be arranged in the area of the rinse zone 7.
  • a bypass line 22 is provided which enables the washing liquor to flow in the direction of the arrow 23 from the last tank 10 bypassing the penultimate or middle tank 9 to the first tank 8. It can be provided in this bypass line 22 to provide a pump or throttles or similar devices with which the amount of wash liquor to be fed through this line is set and regulated. However, these devices are preferably dispensed with in the area of the bypass line 22 and instead, as shown, the inlet of the bypass line 22 is connected to a branch from the pressure-side riser pipe 24 of the circulation pump 13 of the last tank 10 by means of a pipe or hose connection 25.
  • a suitable, adjustable throttle element is provided in the region of the mouth of the hose or pipe 25 on the riser pipe 24 to regulate the main partial flow amount to be supplied to the bypass line 22. like an aperture or a slide, which is optionally also automatically adjustable.
  • the process to be carried out in the above dishwasher is similar to that in conventional dishwashers.
  • the dishes pass through the dishwasher 1 in the direction of the arrow 3 from front to back and the water, which is mainly fed into the rinsing zone 7 by means of the spray device 17, passes through the machine in the opposite direction.
  • the entire fresh water supply initially reaches the last tank 10.
  • it is divided into a main partial flow and a secondary partial flow.
  • the secondary partial stream flows through the overflows 18 and 19 in the individual tanks of the dishwasher 1 in a cascade, whereas the main partial stream in the last washing zone 6 or the last tank 10 is branched off and fed to the first tank 8 bypassing the middle tank 9.
  • the further spray device 21 for supplying fresh water is provided in the last washing zone 6 in order to be able to achieve a drop in concentration by supplying fresh water at an increased concentration determined by the conductivity measurement (not shown) .
  • This additional fresh water supply 21 also serves to supply fresh water when the level probe 10 indicates a lowered liquid level. This can happen if, due to a control inaccuracy, more water or liquid is withdrawn from the tank 10 through the bypass line 22 than is supplied through the fresh water supply 17.
  • the tank 8 has a capacity of 100 liters
  • the tank 9 has a capacity of 150 liters
  • the tank 10 also has a capacity of 150 liters.
  • the amount of rinse or rinse water (fresh water supply) via the rinsing device should be 17 400 liters / hour.
  • a concentration of 3 g of detergent / l of washing liquor is set in a conventional method, in the method according to the invention, for example, a concentration of 2 g of detergent / l of washing liquor in tanks 8 and 10 and a concentration increased to 6 g of detergent / l of washing liquor are intended middle tank 9 can be set.
  • the tanks are first filled in the so-called pre-metering.
  • Fresh water flows in via the spray device 17 and is into the tank 10 Detergent dosed.
  • the conductivity measurement not shown, controls the desired concentration.
  • the bypass line 22 is closed, so that the total amount of water supplied cascades from the tank 10 into the tank 9 and then into the tank 8 - which is provided with a drain, not shown.
  • the pre-dosage then results in a detergent consumption of 1200 g.
  • the pre-metering is carried out in a similar manner in the process according to the invention, except that only a concentration of 2 g / l is initially set here. After the three tanks are filled with this concentration, the further fresh water supply is switched off first. The circulation pump 12 is turned on in the middle tank 9 and then detergent is metered in until a concentration of 6 g / l determined by the conductivity measurement exists in this tank. This results in a consumption of 1400 g of detergent for pre-dosing. The actual dishwashing process then runs, in which 400 l / hour of fresh water are to be supplied.
  • the liquid flows are now to be divided, for example, in such a way that 300 l / hour through the bypass line 22 and 100 l / hour through the machine through the cascade path.
  • the main partial flow quantity is branched off on the pressure side of the circulation pump 13 on the riser pipe 24 of the last tank 10.
  • the main part flow is adjusted by suitable throttle elements, such as orifices, slides, valves, etc., so that the sum of the main part flow and secondary part flow approximately corresponds to the incoming fresh water quantity (rinse water or rinse water quantity).
  • suitable throttle elements such as orifices, slides, valves, etc.
  • the main part flow is adjusted so that the desired distribution ratio f T of rinse water quantity to the secondary part flow results.
  • the distribution ratio f T indicates the factor by which the Detergent concentration in this metering tank can be increased without the detergent consumption increasing compared to the conventional rinsing methods used in the comparison.
  • the described distribution ratio can also be regulated automatically well if a controllable and adjustable slide or the like is arranged as a throttle device in the region of the branch of the main part flow.
  • a manipulated variable can then z. B. serve the clock ratio Tv, which is defined as the operating time of the metering device at the pause time of the metering device. If the clock ratio Tv increases, which is synonymous with an increase in the secondary partial flow, the throttle element in the main partial flow is opened somewhat.
  • This control loop should work with a large time constant to avoid overreactions.
  • the frequency could also be a further indicator of a too large main part flow speak of the response of the level-controlled fresh water inlet 21. The frequency of the response of this device 21 could be recorded and used as a further control variable to support the control circuit determined by the clock ratio Tv.
  • FIG. 2 shows an alternative embodiment of a device for carrying out the method according to the invention, in which the bypass line 22 is arranged differently. Parts and areas which are identical or identical to the device shown in FIG. 1 are given the same reference numerals in FIG. 2.
  • the bypass line 26 is arranged above the tanks 8, 9, 10 in the device according to FIG.
  • the bypass line 26 leads in the form of a pipe or hose connection from the pressure-side riser pipe 24 of the circulation pump 13 of the last tank 10 above the wash liquor level in the various tanks 8, 9, 10 to the tank 8, where it opens.
  • the main part of the flow of electricity led through the bypass line 26 emerges here in the direction of the arrow 23 a.
  • the distribution ratio between the main partial flow and the secondary partial flow is regulated by means of a throttle element which is connected to a suitable point in the bypass line 26 and which is optionally also automatically adjustable.
  • a throttle element which is connected to a suitable point in the bypass line 26 and which is optionally also automatically adjustable.
  • the advantage of this embodiment variant is that the desired or to be set distribution ratio between the main partial flow and the secondary partial flow is independent of the respective level in the tanks 10 and 8. Furthermore, the desired division ratio can easily be checked and, if necessary, registered by a device for flow measurement arranged in the bypass line 26.
  • FIG. 3 Another embodiment variant is shown schematically in FIG. 3.
  • identical or identical parts are provided with the same reference numerals for the embodiment variants according to FIGS. 1 and 2.
  • FIG. 3 are the devices which are still necessarily present, such as spray devices, etc., which are shown in FIGS. 1 and 2.
  • spray devices, etc. which are shown in FIGS. 1 and 2.
  • the only difference to the design variants according to FIG. 1 and FIG. 2 lies in the design of parts 27 to 29.
  • a line 27 branches off from the riser pipe 24 on the pressure side of the circulating pump 13 and opens into the tank 9 above the bath level.
  • the desired partial flow quantity is branched off at the riser pipe 24 and fed to the penultimate tank 9.
  • the main partial flow is fed from the last tank 10 to the third last and / or first tank 8 by means of a bypass line 28.
  • cascade-like overflows 18 and 19 are formed between the individual tanks.
  • the inlet mouth to the bypass line 28 in the tank 10 is lower than the overflow 18, so that all incoming and non-circulated water initially flows into the line 28 and basically only through the overflow 18 an overflow of washing liquor from the tank 10 is prevented.
  • bypass line 28 and the tank 8 The confluence of the bypass line 28 and the tank 8 is lower than the mouth of the bypass line 28 in the tank 10, but the confluence of the bypass line 28 and the tank 8 is arranged above the outflow opening 30 formed there.
  • bypass line 28 there is also a solenoid valve 29, which is closed when the tanks 8 to 10 are filled in the overflow process and the pre-metering and is opened as soon as the dishwasher is put into operation.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Detergent Compositions (AREA)
  • Pinball Game Machines (AREA)
  • Knitting Machines (AREA)
EP90916716A 1989-11-23 1990-11-14 Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr Expired - Lifetime EP0501996B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90916716T ATE101505T1 (de) 1989-11-23 1990-11-14 Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938755 1989-11-23
DE3938755A DE3938755A1 (de) 1989-11-23 1989-11-23 Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr

Publications (2)

Publication Number Publication Date
EP0501996A1 EP0501996A1 (de) 1992-09-09
EP0501996B1 true EP0501996B1 (de) 1994-02-16

Family

ID=6394010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90916716A Expired - Lifetime EP0501996B1 (de) 1989-11-23 1990-11-14 Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr

Country Status (9)

Country Link
US (1) US5356483A (ja)
EP (1) EP0501996B1 (ja)
JP (1) JP3025531B2 (ja)
AT (1) ATE101505T1 (ja)
DE (2) DE3938755A1 (ja)
DK (1) DK0501996T3 (ja)
ES (1) ES2049050T3 (ja)
FI (1) FI94718C (ja)
WO (1) WO1991007904A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057326B4 (de) * 2009-12-07 2012-07-19 Edmund Ebert Verfahren zur Reinigungsmittelzugabe bei gewerblichen Geschirrspülmaschinen
CN110974103A (zh) * 2019-11-26 2020-04-10 珠海格力电器股份有限公司 一种全新变容洗碗机的控制方法、计算机可读存储介质及洗碗机

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119319C2 (de) * 1991-06-12 1997-07-31 Miele & Cie Verfahren zum Betrieb einer programmgesteuerten Geschirrspülmaschine
DE4132306A1 (de) * 1991-09-27 1993-04-08 Henkel Kgaa Verfahren zur steuerung und regelung der reinigungsmittelzufuhr einer geschirrspuelmaschine
DE4311064A1 (de) * 1993-04-03 1994-10-06 Lang Apparatebau Gmbh Verfahren zur Messung der Schmutzbefrachtung einer Waschflotte
PL314528A1 (en) * 1993-11-20 1996-09-16 Unilever Nv Machine dish-washing process
GB9423952D0 (en) * 1994-11-24 1995-01-11 Unilever Plc Cleaning compositions and their use
DE19608036C5 (de) * 1996-03-02 2004-09-30 Finanziaria Ali S.P.A. Reinigungsmaschine, insbesondere für Geschirr
US8092613B2 (en) 2002-05-31 2012-01-10 Ecolab Usa Inc. Methods and compositions for the removal of starch
DE102005015157A1 (de) * 2005-04-02 2006-10-05 Premark Feg L.L.C., Wilmington Mehrtank-Transportspülmaschine und ein Betriebsverfahren hierfür
DE102005035764A1 (de) 2005-07-29 2007-02-01 Premark Feg L.L.C., Wilmington Transportgeschirrspülmaschine und Betriebsverfahren hierfür
US7942978B2 (en) * 2005-08-15 2011-05-17 Ecolab Inc. Auxiliary rinse phase in a wash machine
US20090317311A1 (en) * 2007-02-01 2009-12-24 Johnsondiversey, Inc. Dispenser control systems and methods
DE102007009252A1 (de) 2007-02-22 2008-08-28 Meiko Maschinenbau Gmbh & Co. Kg Verfahren zum Betrieb einer Durchlaufgeschirrspülmaschine
EP2766462B1 (en) 2011-05-20 2019-08-28 Ecolab USA Inc. Acid formulations for use in a system for warewashing
WO2013088266A1 (en) 2011-12-13 2013-06-20 Ecolab Usa Inc. Concentrated warewashing compositions and methods
DE102015013457A1 (de) * 2015-10-16 2017-04-20 Eisenmann Se Anlage zum Behandeln von Gegenständen

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US2619097A (en) * 1945-09-04 1952-11-25 Ingeniors N Adolph Von Bromsse Dishwashing machine with water temperature regulating means
US3896827A (en) * 1973-08-31 1975-07-29 Norman R Robinson Dish machine monitoring of time, temperature, alkalinity, and pressure parameters
US4076554A (en) * 1976-11-01 1978-02-28 Weihe Clyde R Apparatus and method for displaying the cost of operation of a commercial dishwashing machine
US4319930A (en) * 1980-03-28 1982-03-16 Daiwa Can Company, Limited Method for multi-stage washing
JPS56142630A (en) * 1980-04-09 1981-11-07 Fujitsu Ltd Manufacture of semiconductor device
US4379031A (en) * 1981-01-16 1983-04-05 Imperial Clevite Inc. Evaporation driven counterflow rinse system and method
SE8105811L (sv) * 1981-10-01 1983-04-02 Electrolux Ab Kontinuerlig diskmaskin
US4561904A (en) * 1984-09-21 1985-12-31 Hobart Corporation Control system and method of controlling a dishwashing machine
DE3707366A1 (de) * 1987-03-07 1988-09-15 Diversey Gmbh Verfahren zur kontinuierlichen oder diskontinuierlichen maschinellen reinigung von gebrauchsgeschirr

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057326B4 (de) * 2009-12-07 2012-07-19 Edmund Ebert Verfahren zur Reinigungsmittelzugabe bei gewerblichen Geschirrspülmaschinen
CN110974103A (zh) * 2019-11-26 2020-04-10 珠海格力电器股份有限公司 一种全新变容洗碗机的控制方法、计算机可读存储介质及洗碗机

Also Published As

Publication number Publication date
ES2049050T3 (es) 1994-04-01
ATE101505T1 (de) 1994-03-15
DK0501996T3 (da) 1994-08-01
EP0501996A1 (de) 1992-09-09
FI94718B (fi) 1995-07-14
JPH05501973A (ja) 1993-04-15
US5356483A (en) 1994-10-18
FI94718C (fi) 1995-10-25
DE3938755C2 (ja) 1991-09-19
JP3025531B2 (ja) 2000-03-27
WO1991007904A1 (de) 1991-06-13
FI922299A0 (fi) 1992-05-20
DE3938755A1 (de) 1991-05-29
DE59004641D1 (de) 1994-03-24
FI922299A (fi) 1992-05-20

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