EP2201885B1 - Lave-vaisselle - Google Patents

Lave-vaisselle Download PDF

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Publication number
EP2201885B1
EP2201885B1 EP09015603.5A EP09015603A EP2201885B1 EP 2201885 B1 EP2201885 B1 EP 2201885B1 EP 09015603 A EP09015603 A EP 09015603A EP 2201885 B1 EP2201885 B1 EP 2201885B1
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EP
European Patent Office
Prior art keywords
washing liquid
dishwasher
washing
sensor
pump
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.)
Active
Application number
EP09015603.5A
Other languages
German (de)
English (en)
Other versions
EP2201885B2 (fr
EP2201885A1 (fr
Inventor
Gianluca Benedetto
Maria Chiara Brugnera
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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.)
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Publication date
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Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL09015603T priority Critical patent/PL2201885T3/pl
Publication of EP2201885A1 publication Critical patent/EP2201885A1/fr
Publication of EP2201885B1 publication Critical patent/EP2201885B1/fr
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Publication of EP2201885B2 publication Critical patent/EP2201885B2/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—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
    • 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
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • 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
    • 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
    • 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
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
    • 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

Definitions

  • This invention relates to an operating method for a dishwasher.
  • Such a dishwasher usually comprises:
  • the turbidity of the washing liquid is measured by the dishwasher during an initial step of the washing cycle.
  • the dishwasher implements a more or less vigorous cycle.
  • the turbidity measurement may be influenced by the particular conditions in which that measurement is performed.
  • washing liquid turbulence can distort the correct measurement.
  • the technical purpose which forms the basis of this invention is to propose a dishwasher that overcomes the above-mentioned disadvantages of the prior art.
  • Document EP1929925A2 discloses an operating, method for a dishwasher in which the turbidity of wash water during washing is detected to determine next washing operation for washing dish contaminants by using wash water.
  • Document US3,888,269 discloses an operating method for a dishwasher in which the cleanliness condition of the dishes at the end of each subcycle is sensed and the length of the drying cycle is automatically controlled.
  • this invention has for an aim to provide a dishwasher which allows reliable measurement of the dirtiness of dishes to be washed.
  • This invention also has for an aim to provide a dishwasher which allows reliable measurement of the dirtiness of dishes to be washed without using particularly sophisticated and expensive measuring instruments.
  • Figure 1 is a schematic view of a dishwasher in accordance with this invention.
  • Figure 1 the numeral 1 denotes a dishwasher in accordance with this invention.
  • the dishwasher 1 comprises:
  • the washing liquid comprises water, to which detergent, rinse aid, etc. may be added. After coming into contact with the dishes, the washing liquid also comprises the dirt (usually condiments and food residues) removed from the dishes washed.
  • the dishwasher 1 comprises a motor-driven pump 4.
  • the motor-driven pump 4 is preferably a variable speed pump. In addition to a nominal speed and a zero speed, the variable speed pump 4 also has other operating speeds.
  • the pump 4 comprises a rotating impeller. In particular, the pump 4 is of the centrifugal type.
  • the dishwasher 1 also comprises ducting means 5 connecting the washing compartment 2 and the spraying means 3.
  • the pump 4 is located along the ducting means 5 in order to pump the washing liquid from the washing compartment 2 to the spraying means 3. Therefore, the washing liquid passes through the pump 4.
  • the ducting means 5 may connect the spraying means 3 to the bottom 20 of the washing compartment 2. In the bottom 20 of the compartment, the washing liquid sprayed by the spraying means 3 gathers due to the effect of gravity and (as already indicated) may be pumped back to the spraying means 3.
  • the dishwasher 1 also comprises means 6 for determining at least one physical property of the washing liquid.
  • Said determining means 6 comprise a sensor 60 located in the washing compartment 2 or along the ducting means 5.
  • the turbidity sensor 60 is preferably located in a recess made on the bottom of the washing compartment 2, the recess being part of one end of the ducting means 5.
  • the sensor 60 can detect the dirtiness of the washing liquid (preferably in transit) at the sensor 60.
  • the sensor 60 is a turbidity sensor. It comprises an emitter 61 of a beam of light and a receiver 62 which is sensitive to the beam of light:
  • the washing liquid is made to pass between the emitter 61 and the receiver 62.
  • the receiver 62 is opposite the emitter 61.
  • the greater the intensity of the beam of light striking the receiver 62 the cleaner the washing liquid is.
  • the contamination is dirt removed from the dishes, but as is described in more detail below, the sensor 60 could also be used to measure the amount of rinse aid contained in the washing liquid.
  • the senor 60 could comprise two electrodes and measure the electrical conductivity of the washing liquid located between the two electrodes.
  • the dishwasher 1 adopts a first operating reference condition. This is the case for the entire life of the dishwasher 1.
  • the reading by the sensor 60 for measuring the dirtiness of the washing liquid might not occur during the washing cycle or it might occur one or more times during the washing cycle.
  • the flow processed by the pump 4 substantially always adopts the same predetermined value (which may also be zero). The value is always the same irrespective of the washing cycle implemented by the dishwasher 1.
  • the expression "the flow processed by the pump 4" refers to the flow of washing liquid which passes through the pump 4.
  • the pressure head of the pump 4 adopts a predetermined value which is always substantially the same. It is known that a pump (in particular a centrifugal pump) may adopt predetermined combinations of pressure head and flow values. Said combinations depend on the speed of rotation of the pump and the resistance of the circuit (linked to circuit load losses).
  • the dishwasher 1 acts either on the speed of rotation or on the geometry of the ducting means 5 (for example, by introducing narrowings in the transit cross-section of the ducting means 5).
  • the sensor 60 could have other applications, for example for checking that the correct amount of rinse aid has been dispensed (such information could provide the user with indications about how much rinse aid is left).
  • the dishwasher 1 in its lifetime, at least during each reading performed by the sensor 60 for checking correct dispensing of the rinse aid, adopts a second operating reference condition.
  • the flow processed by the pump 4 substantially always adopts the same predetermined value (which may also be zero; even with zero flow the sensor 60 is in a zone flooded with the washing liquid).
  • the predetermined value adopted by the flow processed by the pump 4 in the first operating reference condition may or may not coincide with that adopted in the second operating condition.
  • the first operating reference condition may coincide with the second operating reference condition.
  • the first and second operating reference conditions are linked to particular operating conditions in which the dishwasher attempts to create standardised conditions to allow a better comparison of the measurements performed by the sensor 60. However, they do not correspond to the dishwasher 1 normal operating conditions (meaning that compared with the length of an entire washing cycle, the dishwasher 1 adopts the first or the second operating reference condition for a very limited time). During a time interval before and/or after the adoption of said first operating reference condition, the dishwasher 1 adopts a washing operating condition in which the flow processed by the pump 4 adopts at least one non-zero value different from that adopted during the first operating reference condition.
  • the dishwasher 1 adopts a washing operating condition in which the flow processed by the pump 4 adopts at least one non-zero value different from that adopted during the second operating reference condition.
  • the pump 4 adopts a first predetermined speed of rotation value that is always the same. Said first predetermined value may even be equal to 0. That allows the sensor 60 reading to be performed in conditions which are standardised as far as possible (with obvious advantages in terms of reading repeatability and stability).
  • the flow processed by the pump 4 is between 5 and 50 litres/minute, preferably between 10 and 30 litres/minute, advantageously being equal to 20 litres/minute.
  • the first predetermined speed of rotation value is adopted both if two or more readings are performed during the same washing cycle and if the readings are repeated in a series of separate washing cycles.
  • the pump 4 in contrast adopts at least one operating condition (suitably associated with the washing operating condition) in which it adopts at least a second non-zero speed of rotation value different from the first value.
  • the first operating reference condition is adopted by the dishwasher 1 at least during each reading performed by the sensor 60 for measuring the dirtiness of the washing liquid.
  • the pump 4 reduces its speed of rotation in order to reduce the turbulence of the washing liquid at the sensor 60.
  • the measurement performed by the turbidity sensor 60 could be adversely affected by the turbulence of the washing liquid.
  • the first operating reference condition also applies to a first predetermined time period immediately preceding the reading performed by the sensor 60 and is intended to measure the dirtiness of the washing liquid. This allows the sensor 60 to perform the reading after the flow in the ducting means 5 has stabilised (avoiding readings performed during transition periods).
  • the first predetermined time period is between 15 seconds and 4 minutes, preferably between 2 and 3 minutes.
  • the dishwasher 1 also comprises means for changing the geometry of the ducting means 5 whose activation determines a change in the load losses of the ducting means 5, allowing the dishwasher 1 to switch from the washing operating condition to the first operating reference condition or vice versa.
  • the means for changing the geometry comprise elements able to narrow or widen a cross-section of the ducting means 5 in which the washing liquid flows.
  • the means for changing the geometry of the ducting means 5 determine an increase in the load losses and a consequent reduction in the flow processed by the pump 4.
  • the dishwasher 1 comprises a first racks 71 on which the articles to be washed can be placed.
  • the spraying means 3 comprise a first sprayer 31 located under the first rack 71.
  • the dishwasher 1 comprises means 7 for shutting off the washing liquid which, at least during each reading performed by the sensor 60 for measuring the dirtiness of the washing liquid, prevent the washing liquid from flowing through the first sprayer 31 (advantageously, this occurs irrespective of the parameters set by the user and/or irrespective of the moment of the washing cycle when the reading is performed).
  • the shutoff means 7 prevent the washing liquid from flowing through the first sprayer 31.
  • the washing liquid shutoff means 7 may also be seen as an example of the means for changing the geometry of the ducting means 5.
  • the dishwasher 1 usually comprises a second rack 72 on which the articles to be washed can be placed, this second rack 72 being above the first rack 71.
  • the spraying means 3 comprise a second sprayer 32 interposed between the first and second racks 71, 72.
  • the second sprayer 32 may be fed with the washing liquid.
  • the dishes placed on the first rack 71 intercept the liquid sprayed by the second sprayer 32, breaking up the jet and slowing its fall.
  • the Applicant has demonstrated by experimentation that activation of the second sprayer 32 does not particularly interfere with the reading by the sensor 60.
  • the ducting means 5 comprise a pipe 51 extending from the washing compartment 2. Relative to the direction of washing liquid outflow from the compartment 2 to the spraying means 3, the pipe 51 has a branch 54 downstream of the pump 4. Departing from the branch 54, there is a first duct 52, allowing fluid communication with the first sprayer 31, and a second duct 53, allowing fluid communication with the second sprayer 32.
  • washing liquid shutoff means 7 Relative to the direction and orientation of washing fluid outflow, downstream of the branch 54 the washing liquid shutoff means 7 comprise:
  • the shutoff means 7 comprise a single valve located at the branch 54.
  • Said valve comprises one inlet and two outlets made at the branch 54.
  • the inlet is made at one end of the pipe 51.
  • One of the two outlets is located at one end of the first duct 52.
  • the other outlet is located at one end of the second duct 53.
  • an electric heating element 50 which heats the washing liquid.
  • the electric heating element 50 may be of the tubular type.
  • the electric heating element 50 could be positioned at the pump 4 delivery side.
  • the first and/or the second rack 71, 72 are at least partly formed by a plurality of wires which are woven together to form meshes through which the washing liquid can pass freely. During washing the first and second racks are inside the washing compartment 2. Both the first rack and the second rack 71, 72 can normally be removed from the washing compartment 2 to make dish loading and unloading easier.
  • the shutoff means 7 also prevent the washing liquid from flowing into the first sprayer 31 during a lapse of time immediately preceding the reading performed by the sensor 60. This allows a sensor 60 reading to be performed in a condition which is as stable as possible, leaving the system the time needed to dampen the effects linked to the previous activation of the first sprayer 31.
  • said lapse of time is between 15 seconds and 4 minutes, preferably between 2 and 3 minutes.
  • the first and second sprayers 31, 32 are free to rotate about an axis of rotation.
  • the rotation of the first sprayer 31 is caused by the pressurised liquid flowing inside the first sprayer 31.
  • the rotation of the second sprayer 32 is caused by the pressurised liquid flowing inside the second sprayer 32.
  • the dishwasher 1 adopts the first operating reference condition simultaneously with the shutoff means 7 inhibiting the washing liquid from flowing into the first sprayer 31.
  • the pump 4 adopts a speed of rotation which is greater than the first predetermined value.
  • said predetermined time is between 1 and 3 minutes, preferably equal to 2 minutes.
  • the dishes are heated (preferably to 40°C). This is done by dedicated heating means or by heating.the washing liquid which is sprayed against the dishes.
  • the dishes are heated immediately before the dishwasher adopts the first operating reference condition. Said dish heating is optional, since fluidification of the dirt can also be achieved with washing liquid which is not pre-heated:
  • the first sprayer 31 sprays the washing liquid in the washing compartment 2.
  • the dirtiest dishes are normally placed in the first rack 71. Therefore, vigorous washing of the dishes in the first rack 71 allows better fluidification in the washing liquid of the dirt from the dishes to be washed (allowing correct measurement of the dirtiness of the dishes).
  • the dishwasher 1 comprises an electronic control system which controls adjustment of the pump 4 speed of rotation and/or the shutoff means 7 of the first sprayer 31 and/or the means for changing the geometry of the ducting means 5.
  • the electronic control system can implement a pre-saved algorithm which before using the sensor 60 to perform a reading for measuring the dirtiness of the washing liquid allows adjustment of the flow through the pump 4 (in particular, it allows control of the adjustment to the speed of rotation of the pump 4 and/or the shutoff means 7 of the first sprayer 31 and/or the means for changing the geometry of the ducting means 5).
  • the means 6 for determining at least one physical property of the washing liquid comprise at least one data processing device 63 which analyses the results of the readings supplied by the sensor 60.
  • the reading by the sensor 60 for measuring the dirtiness of the washing liquid takes a period of between 10 and 30 seconds, preferably 20 seconds.
  • the data processing device 63 averages the values detected during the reading and identifies a value which is compared with predetermined ranges each associated with a different washing liquid dirtiness (or turbidity).
  • the dishwasher 1 will select to continue washing by implementing a more or less vigorous cycle.
  • This invention also relates to a method for checking the dispensing of a correct amount of rinse aid in the washing liquid of a dishwasher 1. Said method is implemented by a dishwasher 1 comprising one or of the technical features described above. The method also comprises the following steps:
  • the physical property of the washing liquid analysed using the sensor 60 is normally turbidity.
  • the second operating reference condition dishwasher 1 may coincide with the dishwasher 1 first operating reference condition.
  • the pump 4 speed of rotation in the first operating condition may or may not coincide with that adopted in the second operating condition.
  • it allows the user to select an automatic washing programme in which the dishwasher 1 itself can change at least some washing parameters depending how dirty the dishes are.
  • This invention also relates to a method for measuring the dirtiness of the dishes placed in a washing compartment 2 of a dishwasher 1.
  • the method may therefore be implemented using a dishwasher having one or more of the technical features of the dishwasher 1 described above.
  • the method involves implementation of the following steps:
  • the pump 4 speed of rotation may be changed (in particular reduced) or the geometry of the ducting means 5 may be changed in order to change (in particular increase) the load losses.
  • the flow adjustment step precedes the first operating reference condition for a period of time equal to the first predetermined time period (advantageously between 15 seconds and 4 minutes):
  • the turbidity of the washing liquid is associated with the dirtiness of the washing liquid and therefore the dirtiness of the dishes placed in the washing compartment 2.
  • the dishwasher 1 compares the turbidity value measured using the sensor 60 with various predetermined turbidity thresholds each associated with a different degree of dirtiness.
  • the dishwasher 1 may then select implementation of subsequent more or less vigorous washing steps.
  • the method also comprises the step of preventing the washing liquid from flowing through the first sprayer 31 designed to spray the washing liquid from below the first rack 71.
  • the step of preventing the washing liquid from flowing through the first sprayer 31 is at least partly simultaneous with the step of measuring the turbidity of the washing liquid at the sensor 60.
  • the step of inhibiting the washing liquid from flowing through the first sprayer 31 also applies to a lapse of time immediately preceding the reading of the dirtiness of the washing liquid performed by the sensor 60. As already indicated, said lapse of time is between 15 seconds and 4 minutes.
  • the step of adjusting the pump 4 speed and/or inhibiting the washing liquid from flowing through the first sprayer 31 precedes the step of measuring the turbidity of the washing liquid.

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  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Claims (15)

  1. Procédé de fonctionnement destiné à un lave-vaisselle comportant :
    - un compartiment de lavage (2) conçu pour recevoir les articles à laver ;
    - des moyens de pulvérisation (3) pour pulvériser un liquide de lavage dans le compartiment de lavage (2) ;
    - une pompe entraînée par moteur (4) ;
    - des moyens de conduit (5) pour raccorder le compartiment de lavage (2) et les moyens de pulvérisation (3), ladite pompe (4) étant placée le long des moyens de conduit (5) afin de pomper le liquide de lavage à partir du compartiment de lavage (2) vers les moyens de pulvérisation (3) ;
    - des moyens (6) pour déterminer au moins une propriété physique du liquide de lavage, comportant un capteur (60) placé dans le compartiment de lavage (2) ou le long des moyens de conduit (5) et conçus pour détecter la saleté du liquide lavage au niveau du capteur (60) lui-même :
    ledit procédé étant caractérisé en ce que :
    i) au moins pendant chaque lecture réalisée par le capteur (60) pour mesurer la saleté du liquide de lavage, le lave-vaisselle (1) adopte une première situation de référence de fonctionnement dans laquelle le flux traité par la pompe (4) adopte essentiellement toujours la même valeur prédéterminée ;
    ii) pendant un laps de temps avant et/ou après l'établissement de ladite première situation de référence de fonctionnement, le lave-vaisselle (1) adopte une situation de fonctionnement de lavage dans laquelle le flux traité par la pompe (4) adopte au moins une valeur non nulle différente de celle adoptée pendant la première situation de référence de fonctionnement.
  2. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 1, caractérisé en ce que dans la première situation de référence de fonctionnement, la charge de pression de la pompe (4) adopte toujours essentiellement la même valeur prédéterminée.
  3. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 1 ou 2, caractérisé en ce que dans la première situation de référence de fonctionnement, la pompe (4) adopte une première vitesse de rotation prédéterminée qui est toujours la même.
  4. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que, lorsque le lave-vaisselle (1) adopte la première situation de référence de fonctionnement, la pompe (4) réduit sa vitesse de rotation afin de réduire la turbulence du liquide de lavage le long des moyens de conduit (5).
  5. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que la première situation de référence de fonctionnement s'applique également à un premier laps de temps prédéterminé précédant immédiatement la lecture réalisée par le capteur (60).
  6. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 5, caractérisé en ce que le premier laps de temps prédéterminé se situe entre 15 secondes et 4 minutes.
  7. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, le lave-vaisselle comportant :
    - un premier panier (71) sur lequel les articles à laver peuvent être placés, les moyens de pulvérisation (3) comprenant un premier pulvérisateur (31) placé sous le premier panier (71) ;
    - des moyens de blocage (7) pour arrêter le liquide de lavage et qui, au moins pendant chaque lecture réalisée par le capteur (60) pour mesurer la saleté du liquide de lavage, empêchent le liquide de lavage de passer à travers le premier pulvérisateur (31) ; dans lequel
    les moyens de blocage (7) empêchent le liquide de lavage de s'écouler vers le premier pulvérisateur (31) au moins pendant un laps de temps précédant immédiatement la lecture réalisée par le capteur (60) pour mesurer la saleté du liquide de lavage.
  8. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 7, caractérisé en ce que le laps de temps se situe entre 15 secondes et 4 minutes.
  9. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que le capteur (60) est un capteur de turbidité du liquide de lavage.
  10. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, le lave-vaisselle comportant des moyens pour modifier la géométrie des moyens de conduit (5), dans lequel les moyens de modification de la géométrie comportent des éléments capables de rétrécir ou d'élargir une section transversale des moyens de conduit (5) dans lesquels s'écoule le liquide de lavage, dans lequel lesdits moyens permettant de modifier la géométrie sont actionnés en vue de déterminer une modification dans les pertes de charge des moyens de conduit (5), permettant au lave-vaisselle (1) de commuter de la situation de fonctionnement de lavage à la première situation de référence de fonctionnement ou vice-versa.
  11. Procédé de fonctionnement destiné à un lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé par le fait de comporter une phase de vérification conçue pour vérifier qu'une quantité correcte de produit de rinçage est administrée dans le liquide de lavage dans le lave-vaisselle (1).
  12. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 11, dans lequel ladite phase de vérification comporte les étapes suivantes :
    - exécuter avec le capteur (60) une première et une seconde mesure d'au moins une propriété physique du liquide de lavage, les première et seconde mesures étant exécutées, respectivement, avant et après que le produit de rinçage a été administré dans le liquide de lavage, au moins pendant les première et seconde mesures, le lave-vaisselle (1) adoptant chaque fois une seconde situation de référence de fonctionnement dans laquelle l'écoulement de la pompe (4) adopte une valeur prédéterminée qui est toujours essentiellement la même chaque fois que le lave-vaisselle (1) utilise le capteur (60) afin de vérifier que le produit de rinçage a été administré dans une quantité correcte ;
    - utiliser les première et seconde mesures pour déterminer une variation dans au moins une propriété physique du liquide de lavage avant et après que le détergent a été administré ;
    - comparer la variation dans la au moins une propriété physique du liquide de lavage avant et après que le produit de rinçage a été administré avec au moins une modification minimale prédéterminée correspondant à une situation dans laquelle la quantité correcte de produit de rinçage a été administrée dans le liquide de lavage ;
    - envoyer un signal à une interface d'utilisateur du lave-vaisselle (1) si la modification dans la au moins une propriété physique du liquide de lavage avant et après la distribution du produit de rinçage est plus petite que la variation minimale prédéterminée.
  13. Procédé de fonctionnement destiné à un lave-vaisselle selon la revendication 12, dans lequel la seconde situation de référence de fonctionnement du lave-vaisselle (1) coïncide avec la première situation de référence de fonctionnement du lave-vaisselle.
  14. Lave-vaisselle comportant :
    - un compartiment de lavage (2) conçu pour recevoir les articles à laver ;
    - des moyens de pulvérisation (3) pour pulvériser un liquide de lavage dans le compartiment de lavage (2) ;
    - une pompe entraînée par moteur (4) ;
    - des moyens de conduit (5) pour raccorder le compartiment de lavage (2) et les moyens de pulvérisation (3),
    ladite pompe (4) étant placée le long des moyens de conduit (5) afin de pomper le liquide de lavage à partir du compartiment de lavage (2) vers les moyens de pulvérisation (3) ;
    - des moyens (6) pour déterminer au moins une propriété physique du liquide de lavage, comprenant un capteur (60) placé dans le compartiment de lavage (2) ou le long des moyens de conduit (5) et conçu pour détecter la saleté du liquide de lavage au niveau du capteur (60) lui-même ; caractérisé en ce que le lave-vaisselle comporte des moyens permettant de modifier la géométrie des moyens de conduit (5), les moyens permettant de modifier la géométrie comportent des éléments capables de rétrécir ou d'élargir une section transversale des moyens de conduit (5) dans lesquels le liquide de lavage s'écoule permettant au lave-vaisselle de commuter d'une situation de fonctionnement de lavage à une première situation de fonctionnement au niveau de laquelle la, au moins une, propriété physique du liquide de lavage est déterminée.
  15. Lave-vaisselle selon la revendication 14, caractérisé en ce que le capteur (60) est un capteur de turbidité du liquide de lavage.
EP09015603.5A 2008-12-22 2009-12-17 Lave-vaisselle Active EP2201885B2 (fr)

Priority Applications (1)

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PL09015603T PL2201885T3 (pl) 2008-12-22 2009-12-17 Zmywarka do naczyń

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ITRN2008A000067A IT1392420B1 (it) 2008-12-22 2008-12-22 Lavastoviglie.

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EP2201885A1 EP2201885A1 (fr) 2010-06-30
EP2201885B1 true EP2201885B1 (fr) 2013-11-20
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ITTO20101045A1 (it) * 2010-12-23 2012-06-24 Indesit Co Spa Metodo per il rilevamento di un agente brillantante in un liquido di risciacquo di una macchina di lavaggio di uso domestico, in particolare una lavastoviglie, e relativa macchina di lavaggio.
JP5669702B2 (ja) * 2011-09-22 2015-02-12 三菱電機株式会社 食器洗浄機
CN105125151A (zh) * 2015-10-13 2015-12-09 佛山市顺德区美的洗涤电器制造有限公司 洗碗机
CN105662301B (zh) * 2016-02-29 2018-05-29 宁波方太厨具有限公司 一种水槽式清洗机的洗涤方法
CN113818187B (zh) * 2020-06-18 2023-06-13 云米互联科技(广东)有限公司 循环喷淋洗涤方法及系统、存储介质、洗涤装置

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EP2201885B2 (fr) 2020-07-08
PL2201885T3 (pl) 2014-04-30
IT1392420B1 (it) 2012-03-02
ITRN20080067A1 (it) 2010-06-23
EP2201885A1 (fr) 2010-06-30

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