EP0255863B1 - Lave-vaisselle - Google Patents

Lave-vaisselle Download PDF

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Publication number
EP0255863B1
EP0255863B1 EP87109160A EP87109160A EP0255863B1 EP 0255863 B1 EP0255863 B1 EP 0255863B1 EP 87109160 A EP87109160 A EP 87109160A EP 87109160 A EP87109160 A EP 87109160A EP 0255863 B1 EP0255863 B1 EP 0255863B1
Authority
EP
European Patent Office
Prior art keywords
rinsing
fluid
cycle
cleaning
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
EP87109160A
Other languages
German (de)
English (en)
Other versions
EP0255863A3 (en
EP0255863A2 (fr
Inventor
Rainer Dr. Dipl.-Phys. Stamminger
Heinz Käfferlein
Wolf-Dieter Krueger
Karlheinz Kohles
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0255863A2 publication Critical patent/EP0255863A2/fr
Publication of EP0255863A3 publication Critical patent/EP0255863A3/de
Application granted granted Critical
Publication of EP0255863B1 publication Critical patent/EP0255863B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/0047—Energy or water consumption, e.g. by saving energy or water
    • 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
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • 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
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • 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
    • A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • 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
    • A47L2401/14—Water pressure or flow rate
    • 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
    • A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • 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
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Definitions

  • the invention relates to a dishwasher according to the preamble of claim 1.
  • a known dishwasher of this type (US-A-3 888 269) is provided with a program switching device for controlling a multi-course overall wash cycle.
  • the program switching device controls first of all the pre-rinsing from four successive pre-rinse cycles, a cleaning cycle with heated rinsing liquid and the addition of detergent into the rinsing liquid, two subsequent rinse cycles and finally a drying cycle.
  • liquid is let into a rinsing container of the dishwasher, which is pumped around by a circulation pump via spray devices.
  • the program switching device also has program steps by means of which a rinse liquid change is controlled between the aforementioned rinse cycles, which consists of completely pumping out the rinse liquid and the supply of fresh water for the following rinse cycle.
  • a sensor for detecting the degree of contamination of the washing liquid is also connected to the program switching device and measures the turbidity of the washing liquid during the individual pre-wash cycles. If this sensor emits a signal during the pre-rinse cycle that is running, which signals less contamination of the rinsing liquid below a limit value, the program switching device immediately switches to the program step for the cleaning cycle.
  • the rinsing liquid change that usually follows after the rinsing cycle is hidden, so that the rinsing liquid is transferred from the pre-rinsing cycle into the cleaning cycle becomes.
  • the measurement of the turbidity of the pre-rinse liquid takes place only in the second pre-rinse cycle and is repeated if necessary in the third pre-rinse cycle, with the result that if the pre-rinse liquid is less contaminated, the immediate switch back to the cleaning cycle takes place and if the soiling is above the limit value fourth pre-rinse cycle, including a rinsing liquid change.
  • the subsequent rinsing cycles are no longer influenced by the sensor for detecting the degree of contamination.
  • the subsequent cleaning cycle and the subsequent two intermediate rinsing cycles are then processed in each case. In this embodiment, considerable water consumption and at least the energy consumption required for the circulation of the washing liquid in these washing steps occurs.
  • a dishwasher is also known (EP-A-0 188 158), the program switching device of which controls a multi-course total rinse cycle consisting of three pre-rinse cycles, two cleaning cycles with heated washing liquid and addition of detergent and an intermediate rinse cycle, which is followed by a program step for a drying cycle.
  • a program step is provided between the individual rinse cycles for carrying out a change of rinsing liquid.
  • the program switching device is connected here to a sensor for detecting the degree of contamination of the rinsing liquid in the pre-rinse cycles. If the washing liquid in the respective pre-wash cycle is above a limit value, the pre-wash liquid is then pumped out and a new pre-wash cycle is carried out.
  • the program run is aborted because an error in the control must then be expected. If, on the other hand, the sensor does not detect any contamination above the limit value, the current pre-rinse cycle is carried out to the end and a rinsing liquid change is carried out in any case. Then the specified cleaning cycles and the intermediate rinsing cycle are carried out unchanged. Even with the so controlled Dishwasher has a high water consumption and at least the energy consumption required for pumping around the washing liquid.
  • a dishwasher is also known (FR-A-2 417 967) in which a pressure sensor for detecting the degree of contamination of the washing liquid is attached to the outlet line of a circulation pump for pumping washing liquid.
  • This sensor controls the program switching device in such a way that in the respective rinsing cycle of a multi-course total rinsing cycle, liquid is initially let into the rinsing tank until the sensed pressure on the pump outlet line has a predetermined value. This ensures that the dishwasher can work with the minimum amount of water required for this pressure value.
  • a second, higher pressure value is then specified. For this purpose, rinsing liquid is fed in again until the specified pressure value is reached at the pump outlet.
  • the pressure value detected by the sensor depends on the degree of contamination of the rinsing liquid in such a way that a larger quantity of rinsing liquid must be present with increasing degree of contamination until the respectively specified pressure value is reached. Measures can also be provided to extend or shorten the entire washing cycle as a function of whether the dishes are clean or not. Unnecessary filling circuits can then be switched off or additional circuits can be added. However, complete rinsing liquid changes are also provided here between the individual rinsing cycles.
  • the invention has for its object to take measures in a dishwasher according to the preamble of claim 1, by means of which a further reduction in water and energy consumption is made possible with little contamination of the dishes to be washed.
  • the cleaning process is carried out completely, whereby a program step is provided during the cleaning process in which a subset of the dirty washing liquid is removed from the area of the sieves provided for filtering the washing liquid, where the dirt particles are piled up in concentrated form. The removed part of the rinsing liquid is then replaced by fresh water. Due to the high level of contamination in the cleaning cycle, two subsequent intermediate rinsing cycles are then carried out. If, on the other hand, the sensor detects a lower degree of contamination of the rinsing liquid in the cleaning cycle, partial emptying is not carried out in the cleaning cycle and only a single intermediate rinsing cycle is carried out.
  • the cleaning liquid provided for the pre-rinse cycle is taken over into the cleaning cycle and used there for heating and the addition of detergents for the cleaning cycle. There is also no partial emptying in the cleaning cycle and only a single intermediate rinse cycle. In this way, the amount of liquid required for the cleaning cycle and the amount of liquid required as a replacement for partial emptying as well as the Quantity of liquid saved for an intermediate rinse. The duration of the program can also be shortened accordingly.
  • the limit value for the signal supplied by the sensor can be adjustable so that different degrees of soiling can also be predetermined in different rinse cycles as a starting point for the determination of a reduced or increased degree of soiling. If the sensor also detects a low degree of contamination, the program control assigned to the dishwasher is influenced in such a way that the program sections which can be shortened in this case are skipped or the emptying pump is prevented from being switched on.
  • the pressure lines (4, 5) branch off from a flow reversing device (6), for example a continuously rotating rotary valve, which is connected to the pressure port (7) of a circulation pump (8).
  • a flow reversing device (6) for example a continuously rotating rotary valve, which is connected to the pressure port (7) of a circulation pump (8).
  • an intake (9) leads into a drain pan (10) provided in the bottom (11) of the washware container (1) and through funnel-shaped fine sieve (12) towards the interior (13) of the washware container (1) is covered.
  • the fine sieve (12) merges in the lower part into a cylindrical fine sieve cylinder (14) directed vertically downwards, which opens into a drainage shaft (15).
  • a drain connection (16) leads from the drain shaft (15) to an emptying pump, not shown.
  • a coarse sieve (17) is located within the fine sieve cylinder (14).
  • the washware container is filled with liquid via a water line (18) with the controllable valve (19) switched on, which is controlled by a program switching device (20) that also controls the circulation pump (8) and other electrical components.
  • At least one sensor (21) is arranged in the washing system in order to determine the degree of contamination of the washing liquid which is generated by the addition of washing agent to the filled water in the successive washing steps of the overall washing program controlled by the program switching device (20) during the cleaning of contaminated goods. which outputs a control signal dependent on the determined degree of contamination to the program switching device.
  • Different degrees of soiling can also be predetermined in different rinse cycles as a starting point for the determination of a reduced or increased degree of soiling.
  • the sensor (21) can be designed as a pressure sensor (21.1) which is connected to the pressure port of the circulation pump. However, pressure sensors (21.2 or 21.3) can also be connected to the pressure lines (4) or (5) to the spray arms (2) or (3). A pressure sensor (21.4) can also be assigned to the intake port (9) of the circulation pump (8). However, the sensor (21) can also be designed as an optical sensor and respond to the turbidity of the rinsing liquid. In addition, it is also possible to use the sensor (21) to record the weight of the washing liquid or the flow rate of the washing liquid. However, the speed of the spray arms (2 or 3) can also be scanned with a sensor (21.5).
  • the power-dependent speed of the circulation pump (8) or the current consumption of the drive motor for the circulation pump (8) can be detected with a sensor (21.6).
  • a sensor (21.6).
  • a bypass path can be provided in the flushing liquid path, in particular in the pipe system, in which a filter screen is arranged, a pressure sensor measuring the pressure loss or dynamic pressure occurring on the filter screen. This filter screen must be rinsed free after each rinse cycle in order to avoid falsification of the measurement result from previous rinse cycles.
  • the rinsing liquid with a pollution degree of 0 is practically pumped around in the rinsing system. If, for example, the pressure sensor (21.1) is used to determine the degree of contamination, then the maximum achievable pressure in the flushing system is present. If this pressure falls below a predetermined value in the course of the respective rinse cycle to be processed, which can be different in the pre-rinse cycle than in the cleaning cycle, this means normal or increased contamination of the items to be rinsed. There is then no reason to change a normal basic washing program according to FIG. 2. Accordingly, after the inflow of water for the pre-rinse cycle, the complete pre-rinse cycle specified by the program switching device is carried out.
  • the pre-rinse cycle is processed to the end.
  • the dirt-laden rinsing liquid is emptied there and fresh water is added again for the subsequent cleaning cycle.
  • a partial emptying of the washing liquid is carried out via the emptying pump.
  • the main part of the dirt collected in the coarse sieve and in the drain shaft is removed from the rinsing liquid and then the rinsing liquid level is refilled to the initial level, as well as the ongoing cleaning cycle up to the maximum end specified by the program switching device (20). continued.
  • the rinsing liquid from the pre-rinse cycle can be used immediately for the subsequent cleaning cycle. There is then no need to change the water from emptying and supplying. If the degree of soiling is higher but below the normal value, it is advisable to change the water. In any case, however, the duration of the program will be reduced by the hidden part of the pre-wash cycle. If a degree of soiling below the normal value is determined in the subsequent cleaning cycle at the time of the pressure measurement, then the partial water change after heating up the cleaning liquid can be omitted and at least the program time period required for the water change can be hidden.
  • the period in which the dishes are washed further after the end of the heating phase can also be shortened.
  • This rinsing time can be selected depending on the degree of contamination.
  • the water is changed again, one of the intermediate rinsing cycles being hidden. This is followed by the final rinse and drying cycle in the same program.
  • the correspondingly shortened running of the circulation pump results in a reduction in the drive energy for the circulation pump and a shortened washing program sequence in addition to the water saved.
  • the degree of contamination can be determined by a sensor that responds to the flow speed.
  • the rotational speed of the spray arms driven by recoil also changes, so that their rotational speed can also be a measure of the degree of contamination.
  • the power requirement for the drive motor of the circulating pump changes with the density of the rinsing liquid, which is dependent on the degree of contamination, so that the degree of contamination can also be determined by appropriate sensors via its speed or current consumption.
  • the liquid level in the drain pan changes with different delivery volumes of the circulating pump, so that the level of contamination can be determined from this using a level sensor (21.7).

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (4)

  1. Machine à laver la vaisselle comportant un dispositif de changement de programme (20) prévu pour commander un cycle de lavage global à plusieurs phases, dispositif qui commande au moins et successivement des unités d'un traitement se déroulant pour un prélavage, un cycle de lavage avec du liquide de lavage chauffé et des cycles de lavage intermédiaires, dans lequel du liquide est admis dans un récipient de lavage (1, 13), et est transvasé par une pompe de circulation (8) à l'aide d'un dispositif de pulvérisation (2, 3), un changement de liquide étant prévu respectivement entre chaque cycle de lavage individuel, ce changement de liquide réalisant l'évacuation totale du liquide et l'admission d'eau fraîche dans le cycle de lavage suivant, et un capteur (21) étant destiné à l'enregistrement du degré d'encrassement du liquide, ledit capteur (21) appliquant un signal au dispositif de changement de programme (20) pendant le cycle de prélavage, lorsque l'encrassement du liquide de lavage indique une valeur faible en dessous d'une valeur limite, ce signal interrompant le changement du liquide de lavage après le cycle de prélavage, ou commutant le dispositif de changement de programme (20) sur l'unité de traitement suivant immédiatement pour le changement du liquide de lavage, caractérisée en ce que le dispositif de changement de programme (20) présente une unité de traitement pour un cycle de prélavage unique, en ce qu'un capteur (21) est connecté à l'unité de traitement pour le cycle de lavage, en ce qu'un changement partiel de liquide est prévu dans l'unité de traitement pour le cycle de lavage, durant lequel seule une quantité partielle de liquide de lavage chargé de saleté est évacuée par la pompe et le niveau de liquide est rétabli au niveau d'origine par remplissage, et en ce que le signal supprime le changement partiel du liquide, ledit signal étant donné par le capteur (21) au dispositif de changement de programme (20) dans le cas d'un degré d'encrassement faible du liquide de nettoyage dans le cycle de lavage et ne libèrant l'unité de programme que pour un cycle intermédiaire unique.
  2. Machine à laver la vaisselle selon la revendication 1, caractérisée en ce que la valeur limite pour le signal donnée par le capteur (21) est réglable.
  3. Machine à laver la vaisselle selon la revendication 1 ou 2, caractérisée en ce que le cycle de lavage intermédiaire ultérieur est temporairement supprimé du dispositif de changement de programme dans le cas d'un degré d'encrassement faible dans le cycle de lavage.
  4. Procédé pour actionner une machine à laver la vaisselle selon l'une des revendications 1, 2 ou 3 avec un programme de lavage global à plusieurs cycles, comprenant au moins un prélavage, un cycle de lavage, des cycles de lavage intermédiaires, entre lesquels un changement complet du liquide de lavage est respectivement prévu, le degré d'encrassement du liquide de lavage étant déterminé pendant le prélavage, ainsi que la suppression du changement du liquide de lavage suivant, et le liquide de prélavage étant pris en considération pour le cycle de lavage, dans le cas d'un degré d'encrassement plus réduit par rapport à un degré d'encrassement prédéfini, caractérisé en ce qu un seul cycle de prélavage est exécuté,
    en ce que le degré d'encrassement est mesuré pendant le cycle de lavage
    en ce qu'un changement partiel de liquide est prévu dans le cycle de lavage, pendant lequel seule une quantité partielle de liquide de lavage encrassé est évacuée et le niveau de liquide est rétabli au niveau initial par remplissage et,
    en ce que le changement partiel du liquide est supprimé dans le cycle de lavage lorsque le degré d'encrassement est plus faible et qu'ensuite seul un cycle de lavage intermédiaire avec un changement de liquide complet, le précédant, est exécuté.
EP87109160A 1986-08-04 1987-06-25 Lave-vaisselle Expired - Lifetime EP0255863B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863626351 DE3626351A1 (de) 1986-08-04 1986-08-04 Verfahren zum betreiben einer geschirrspuelmaschine
DE3626351 1986-08-04

Publications (3)

Publication Number Publication Date
EP0255863A2 EP0255863A2 (fr) 1988-02-17
EP0255863A3 EP0255863A3 (en) 1989-03-15
EP0255863B1 true EP0255863B1 (fr) 1992-07-01

Family

ID=6306656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109160A Expired - Lifetime EP0255863B1 (fr) 1986-08-04 1987-06-25 Lave-vaisselle

Country Status (3)

Country Link
EP (1) EP0255863B1 (fr)
DE (2) DE3626351A1 (fr)
ES (1) ES2033741T3 (fr)

Families Citing this family (37)

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DE19651296B4 (de) * 1996-12-10 2016-11-10 BSH Hausgeräte GmbH Geschirrspülmaschine mit einer Steuereinrichtung
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DE19651297B4 (de) * 1996-12-10 2016-11-24 BSH Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine
DE19831687A1 (de) * 1998-07-15 2000-01-20 Whirlpool Co Verfahren zum Betreiben einer Geschirrspülmaschine mit Programmsteuerung
DE19912103A1 (de) * 1999-03-18 2000-09-21 Hansgrohe Ag Verfahren und Vorrichtung zur Wiederverwertung von Grauwasser
DE10135191A1 (de) * 2001-07-19 2003-01-30 Bsh Bosch Siemens Hausgeraete Verfahren zum Betreiben eines wasserführenden Haushaltgerätes und Haushaltgerät hierzu
DE10253009B3 (de) * 2002-11-14 2004-04-08 Whirlpool Corp., Benton Harbor Verfahren zum Betrieb einer Geschirrspülmaschine
DE10253017B4 (de) * 2002-11-14 2004-09-09 Whirlpool Corp., Benton Harbor Verfahren zum Betreiben einer Geschirrspülmaschine mit einer zentralen Steuereinheit
DE10253025B3 (de) * 2002-11-14 2004-07-22 Whirlpool Corp., Benton Harbor Verfahren zum Betreiben einer Geschirrspülmaschine mit zentraler Steuereinheit und Trübungsmessung
DE10314892A1 (de) * 2003-04-01 2004-10-14 Electrolux Home Products Corporation N.V. Verfahren zur Erkennung der Beladung eines Siebsystems einer Geschirrspülmaschine
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Publication number Publication date
EP0255863A3 (en) 1989-03-15
ES2033741T3 (es) 1993-04-01
DE3626351A1 (de) 1988-02-11
DE3780097D1 (de) 1992-08-06
EP0255863A2 (fr) 1988-02-17
DE3626351C2 (fr) 1992-08-06

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