EP0501996A1 - Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr. - Google Patents
Verfahren zur kontinuierlichen maschinellen reinigung von gebrauchsgeschirr.Info
- Publication number
- EP0501996A1 EP0501996A1 EP90916716A EP90916716A EP0501996A1 EP 0501996 A1 EP0501996 A1 EP 0501996A1 EP 90916716 A EP90916716 A EP 90916716A EP 90916716 A EP90916716 A EP 90916716A EP 0501996 A1 EP0501996 A1 EP 0501996A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- last
- fresh water
- washing
- tanks
- 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
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004140 cleaning Methods 0.000 title claims description 24
- 239000013505 freshwater Substances 0.000 claims abstract description 35
- 238000005406 washing Methods 0.000 claims abstract description 34
- 239000003599 detergent Substances 0.000 claims description 38
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 2
- 238000004851 dishwashing Methods 0.000 abstract description 5
- 239000004094 surface-active agent Substances 0.000 abstract 2
- 239000007921 spray Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000005611 electricity Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
Definitions
- the invention relates to a method for the continuous machine cleaning of tableware in a commercial dishwasher with washing and subsequent rinsing zone, in which the soiled dishes are sprayed with washing liquor in succession in at least three washing zones fed from separate tanks by means of circulation pumps and a spraying device, which is preferably cascaded from the last to the first tank by overflow, and the detergent concentration in the wash liquor in the individual tanks is initially set separately by predosing and after the start of the cleaning process by replenishing detergent and by supplying fresh water into the last tank is maintained and in which a so-called basic cleaning with a significantly increased detergent concentration in the wash liquor may be carried out at greater intervals.
- the object of the invention is to create a solution which makes it possible, without dispensing with extremely highly concentrated cleaning solutions, to increase the cleaning performance of generic processes without increasing the overall cleaning consumption.
- this object is achieved according to the invention in that one of the last tank - 3 -
- the main part of the stream of washing liquor is branched off and fed directly to the third last and / or a tank further ahead, which is more than 50%, preferably more than 75%, of the fresh water amount flowing to the last tank, so that the remaining washing liquor, at least as a secondary part stream, is the tanks from the middle and / or penultimate tank to in a cascade, 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 only in this tank is done.
- the cleaner saved during a period of time can be used for a basic cleaning subsequent to 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 time 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 division 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 comes from the rinse zone.
- the invention provides a further embodiment. tion that fresh water is supplied to the last tank when a level probe responds via a further, preferably fan jet nozzles, fresh water supply.
- the invention has the advantageous further embodiment that the main part flow rate is branched off on the riser pipe on the pressure side of the circulation pump of the last tank and the secondary flow part is cascaded from the last tank going through the tanks.
- Another embodiment of the invention provides that the amount of secondary stream on the riser pipe is branched off on the pressure side of the circulation pump of the last tank and fed to the middle and / or penultimate tank, and the main part stream amount is bypassed from the last tank to the third last and / or a tank is led forward.
- the method according to the invention is characterized in that the distribution ratio is regulated by the setting of the main portion of the current and the manipulated variables are 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 set-up ratio can be set and controlled automatically and the method can be carried out with a constant concentration.
- FIG. 1 shows an apparatus for performing the method
- Figure 2 shows an alternative embodiment of the device and in
- FIG. 3 shows a further embodiment of an apparatus for performing the method.
- 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 the arrow 3 during operation.
- the dishwasher has washing zones 4, 5 and 6, of which the washing zone 4 is also used as a pu pen clearing zone is designated.
- the rinsing or rinsing zone 7 adjoins the washing zone 6.
- Each of the washing zones 4, 5 and 6 has a tank 8, 9 or 10, from which the washing liquor in the respective tank is supplied by means of circulation pumps 11, 12, 13, spray devices 14, 15 and 16, respectively.
- the tank 8 is also referred to in the following and in the entire application text as the first or third last tank, the tank 9 as the middle or penultimate tank and the tank 10 as the last tank.
- 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 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 valve is provided in the region of the mouth of the hose or pipe 25 on the riser pipe 24 to regulate the main part of the flow of electricity to be supplied to the bypass line 22.
- element such as an aperture or a slide, which is optionally also automatically adjustable.
- the method to be carried out in the above dishwasher is similar to that in conventional dishwashers.
- the dishes pass through the dishwasher 1 from the front to the rear in the direction of the arrow 3 and the water, which is mainly fed into the rinse zone 7 by means of the spray device 17, passes through the machine in the opposite direction.
- the entire amount of fresh water supplied first arrives in the last tank 10.
- the amount of secondary part flows through the overflows 18 and 19 in a cascade-like manner through the individual tanks of the dishwasher 1, whereas the main part of the flow of electricity branches off in the last washing zone 6 or the last tank 10 and is fed to the first tank 8 bypassing the middle tank 9 becomes.
- the tank 8 has a capacity of 100 liters
- the tank 9 a capacity 'of 150 liters
- the tank 10 also has a capacity of 150 liters has.
- the amount of rinsing or rinsing water (fresh water supply) via the rinsing device should be 17 400 liters / hour.
- a concentration of 3 g of detergent / 1 wash liquor is set in a conventional process, in the process according to the invention, for example, a concentration of 2 g of detergent / 1 wash liquor in tanks 8 and 10 and one should be increased to 6 g of detergent / 1 wash liquor Concentration in the 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 entire 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 consumption of detergent for the pre-dosing is 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 first shut off. 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 takes place, 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 pass through the machine through the bypass line 22 and 100 l / hour via the cascade path.
- a tank is metered in and an increased concentration is set here.
- This tank does not receive the total amount of wash liquor that corresponds to the amount of fresh water flowing in, but only an amount of secondary electricity.
- the main part of the flow is led around this tank by means of a bypass line.
- the main part of the flow of electricity 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 the secondary part flow roughly corresponds to the amount of fresh water to be fed (rinse water or rinse water).
- 300 1 / h - main part flow rate + 100 1 / h - secondary part flow rate 400 1 / h - fresh water flow. Furthermore, the main part flow is adjusted so that the desired distribution ratio f j of rinse water quantity to the secondary part flow quantity results.
- 400 1 / h: 100 1 / h 4. Since the metering in only takes place in the tank of increased concentration and thus only the secondary part stream flowing into this tank has to be metered in, the distribution ratio f ⁇ 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 Dosier ⁇ at break time of the metering. If the clock ratio Tv increases, which is synonymous with an increase in the secondary current, the throttle element in the main current is opened somewhat.
- This control loop should work with a large time constant in order to avoid overreactions.
- the house speak of the ability of the level-controlled further fresh water inlet 21 to respond. 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 sub-stream passed 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 - 15 -
- 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.
- the devices which are still necessarily present, such as spray devices, etc. which are shown in FIGS. 1 and 2.
- the difference to the embodiment variants according to FIG. 1 and FIG. 2 consists solely 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 portion of electricity is supplied 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.
- 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)
Description
Claims
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 true EP0501996A1 (de) | 1992-09-09 |
EP0501996B1 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 (de) |
EP (1) | EP0501996B1 (de) |
JP (1) | JP3025531B2 (de) |
AT (1) | ATE101505T1 (de) |
DE (2) | DE3938755A1 (de) |
DK (1) | DK0501996T3 (de) |
ES (1) | ES2049050T3 (de) |
FI (1) | FI94718C (de) |
WO (1) | WO1991007904A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009057326A1 (de) | 2009-12-07 | 2011-06-09 | Ebert, Edmund | Reinigungsmittelzugabe Ejet+ |
Families Citing this family (16)
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 (de) | 2011-05-20 | 2019-08-28 | Ecolab USA Inc. | Säureformulierungen zur verwendung in einem waschsystem |
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 |
CN110974103B (zh) * | 2019-11-26 | 2020-11-24 | 珠海格力电器股份有限公司 | 一种变容洗碗机的控制方法、计算机可读存储介质及洗碗机 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1989
- 1989-11-23 DE DE3938755A patent/DE3938755A1/de active Granted
-
1990
- 1990-11-14 EP EP90916716A patent/EP0501996B1/de not_active Expired - Lifetime
- 1990-11-14 US US07/859,419 patent/US5356483A/en not_active Expired - Fee Related
- 1990-11-14 DK DK90916716.5T patent/DK0501996T3/da active
- 1990-11-14 JP JP2515345A patent/JP3025531B2/ja not_active Expired - Fee Related
- 1990-11-14 ES ES90916716T patent/ES2049050T3/es not_active Expired - Lifetime
- 1990-11-14 DE DE90916716T patent/DE59004641D1/de not_active Expired - Lifetime
- 1990-11-14 WO PCT/EP1990/001945 patent/WO1991007904A1/de active IP Right Grant
- 1990-11-14 AT AT90916716T patent/ATE101505T1/de not_active IP Right Cessation
-
1992
- 1992-05-20 FI FI922299A patent/FI94718C/fi active
Non-Patent Citations (1)
Title |
---|
See references of WO9107904A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009057326A1 (de) | 2009-12-07 | 2011-06-09 | Ebert, Edmund | Reinigungsmittelzugabe Ejet+ |
Also Published As
Publication number | Publication date |
---|---|
ES2049050T3 (es) | 1994-04-01 |
ATE101505T1 (de) | 1994-03-15 |
DK0501996T3 (da) | 1994-08-01 |
EP0501996B1 (de) | 1994-02-16 |
FI94718B (fi) | 1995-07-14 |
JPH05501973A (ja) | 1993-04-15 |
US5356483A (en) | 1994-10-18 |
FI94718C (fi) | 1995-10-25 |
DE3938755C2 (de) | 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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