EP2609845B1 - Lave-vaisselle et méthode de détection d'anomalies de fonctionnement. - Google Patents

Lave-vaisselle et méthode de détection d'anomalies de fonctionnement. Download PDF

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Publication number
EP2609845B1
EP2609845B1 EP12199559.1A EP12199559A EP2609845B1 EP 2609845 B1 EP2609845 B1 EP 2609845B1 EP 12199559 A EP12199559 A EP 12199559A EP 2609845 B1 EP2609845 B1 EP 2609845B1
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European Patent Office
Prior art keywords
mean
motor
pump
threshold
dishwashing machine
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German (de)
English (en)
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EP2609845A1 (fr
Inventor
Danilo D'antonio
Alessio Beato
Federico Leonardi
Marco Wilhelmus Gerhardus Ten Bok
Michele Totaro
Giacomo Marvardi
Gianluca Benedetto
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Whirlpool Emea Srl
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Whirlpool EMEA SpA
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Priority claimed from IT001249A external-priority patent/ITTO20111249A1/it
Priority claimed from IT001246A external-priority patent/ITTO20111246A1/it
Priority claimed from IT001248A external-priority patent/ITTO20111248A1/it
Priority claimed from IT001247A external-priority patent/ITTO20111247A1/it
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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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0023—Water filling
    • 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
    • A47L15/0052—Noise reduction
    • 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
    • A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
    • 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
    • A47L2401/09—Water level

Definitions

  • the present invention relates to a dishwashing machine and to a method for controlling the general operation thereof.
  • a dishwasher such as, for example, pressure switch, heating resistor, hoses and the like
  • these components are subject to wear due to ageing and/or corrosion. If a failure of one or more of these components is not immediately detected, e.g. through the use of automatic means, there is a high probability that the dishwasher will cause a flooding of the place where it is installed, with easily imaginable consequences.
  • PWM pulse width modulation
  • the dishwasher allows detecting some malfunction situations, such as presence of excessive foam in the tub, clogged filter or presence of upturned pots or bowls, based on variations over time of electric parameters (voltage and current) related to the motor that drives the recirculation pump.
  • the present invention aims at solving these and other problems by providing a dishwasher having such structural and functional features as to allow for quickly and effectively checking its operating conditions.
  • the idea underling the present invention is to determine and/or estimate a set of known operating variables of a dishwasher upon activation of one or more motors comprised in said dishwasher, including the motor associated with the drain pump, thereby creating de facto a virtual sensor and detecting in the shortest possible time, by means of said virtual sensor, any malfunction and/or incorrect use of the household appliance during the entire wash cycle.
  • a dishwasher 1 comprises a tub 2 wherein dishes are placed, which comprises one or more rotary sprayers 21 fed with a flow 22 running along a recirculation duct 24; said flow consists of a wash or rinse liquid pumped by a recirculation pump 31 and heated by a heater 32, both of which are comprised in the recirculation duct 24.
  • said pump 31 comprises an intake duct in fluidic communication with a sump 23 located on the bottom of the tub 2 and capable of collecting the liquid.
  • a filter 34 located in the sump 23 prevents any dirt from reaching the pump 31 and the heater 32.
  • the delivery duct of the recirculation pump 31 is connected to a selection valve 33, which allows selecting the desired hydraulic circuit (in the case shown in Fig. 1 , the selection valve 33 allows to feed a lower sprayer only, an upper sprayer only, or both sprayers simultaneously).
  • the drain duct 35 which extends from the sump 23, is in fluidic communication with a sewage system (not shown in the drawings), and comprises a drain pump 36 to pump the water away from the tub 2 and a non-return valve 37, the latter advantageously preventing any liquid or gaseous sewage backflow from getting into the dishwasher 1, which might jeopardize the hygiene thereof.
  • the dishwasher 1 comprises a supply duct 38 in fluidic communication with the inside of the tub 2 and with a water mains (not shown in the drawings); said supply duct 38 comprises a valve 39 for allowing or preventing the water from entering the tub 2, and a turbine flow meter 40 capable of measuring the quantity of water flowing into the tub 2, preferably arranged between the valve 39 and the tub 2.
  • the dishwasher 1 further comprises a control unit 5, which controls the execution of wash cycles of the dish treatment program.
  • a typical treatment cycle of the dishwasher 1 comprises a sequence of steps (usually pre-wash, wash, cold rinse, hot rinse), each comprising in succession a water loading substep P1, a holding substep P2 and a drain substep P3.
  • steps usually pre-wash, wash, cold rinse, hot rinse
  • the valve 39 is kept in the open position most of the time, thus causing a water flow 25 to enter the tub 2.
  • valve 39 is kept closed and the recirculation pump 31 stays on most of the time, thereby causing the flow 22 to run along the duct 24 and feed with a liquid (according to wash and rinse requirements) the lower sprayer and/or the upper sprayer, depending on the position of the selection valve 33.
  • detergent and/or rinse aid may be added to the liquid, which mainly consists of water.
  • the liquid may be heated by turning on the heater 32, so as to improve the cleaning action, in the case of a wash liquid, or the drying action, in the case of a rinse liquid.
  • the valve 39 is kept closed and the recirculation pump 31 is turned off, whereas the drain pump 36 is turned on to generate a liquid drain flow 26 towards the sewage system, thereby emptying the tub 2.
  • the dish treatment program will carry out the next step of the cycle or it will end, if said program has been completed.
  • Both pumps 31 and 36 are preferably driven by variable-speed electric motors supplied by an electronic power circuit (not shown in the drawings) comprised in the dishwasher 1, more preferably by three-phase permanent-magnet brushless motors, the electronic power circuit thereof comprises at least one inverter (not shown in the drawings).
  • an electronic power circuit (not shown in the drawings) comprised in the dishwasher 1, more preferably by three-phase permanent-magnet brushless motors, the electronic power circuit thereof comprises at least one inverter (not shown in the drawings).
  • electromechanical quantities that characterize the operation of the motor associated with the respective pump 31,36 are periodically monitored/measured; such electromechanical quantities may comprise currents absorbed by each phase, voltage on the DC-Bus of the inverter, mechanical revolution speed, direction of rotation of the motor, torque delivered by the motor, and other electromechanical quantities.
  • electromechanical quantities may be detected by means of suitable measuring circuits or determined/estimated by processing measured physical quantities, e.g. absorbed current; based on such electromechanical quantities, it is possible to determine the state of a virtual sensor comprised in the dishwashing machine 1, thereby estimating a set of operating variables of said dishwashing machine 1.
  • These operating variables comprise a head of the wash or rinse liquid relative to the bottom of the sump 23.
  • the head of the liquid can be discriminated, preferably by associating it with a discrete set of levels, based on the state of said virtual sensor.
  • the state of the virtual sensor allows, among other things, to discriminate the presence of a hydraulic head on the intake ducts of the pumps 31 and 36.
  • the level of the liquid affects the resistant torque and therefore the current absorbed by the motors of the pumps 31 and 36, which is a function of the torque delivered by said motors.
  • the state of said virtual sensor also allows to discriminate the quality of the wash liquid, e.g. the presence of dirt and/or foam.
  • control unit 5 advantageously acquires and processes these electromechanical quantities of the motors of the pumps 31 and 36, so that said unit 5 can determine a set of states of the virtual sensor associated with the dishwashing machine 1, deriving therefrom information about the operating state of the dishwashing machine 1 to monitor the proper operation thereof, so as to detect in the shortest possible time any anomalous situations, such as problems caused by one or more failures or by incorrect use of the dishwasher 1, and/or to detect in the shortest possible time the presence of any dirt or foam.
  • control unit 5 comprises a state machine, the state transitions of which are generated by the values of the electromechanical quantities of the motor of the pump 31.
  • determination of the presence of the hydraulic head advantageously takes place without using a dedicated physical sensor, such as, for example, a pressure switch, but indirectly by monitoring the electromechanical quantities of the motor of the pumps 31 or 36.
  • a method for controlling the dishwasher comprises the following steps:
  • the operating variables also include a mean torque ME_Mean and a torque standard deviation ME_DevStd, both of which are calculated starting from measurements of the phase currents of the motor based on well-known relations, of course by using the nominal data of the controlled motor.
  • ME_Mean a mean torque ME_Mean
  • ME_DevStd a torque standard deviation ME_DevStd
  • the state machine FSM1 preferably comprises three states: a state S0 (initial state) representing a substantially empty tub 2, a state S1 representing the tub 2 as containing a quantity of wash or rinse liquid corresponding to the full level, i.e. sufficient for executing the holding step P2, and, finally, a state S2 representing a situation in which there are problems due to dirt deposited in the filter 34 or foam formed inside the tub 2.
  • a state S0 initial state
  • S1 representing the tub 2 as containing a quantity of wash or rinse liquid corresponding to the full level, i.e. sufficient for executing the holding step P2
  • a state S2 representing a situation in which there are problems due to dirt deposited in the filter 34 or foam formed inside the tub 2.
  • the transition to the initial state S0 can occur from the states S1 and S2 when the mean torque ME_Mean is lower than a threshold value Me_Threshold, preferably lower than 50Nmm, for a time interval t0, preferably shorter than 10 seconds.
  • a threshold value Me_Threshold preferably lower than 50Nmm
  • the transition to the state S1 can occur from the states S0 and S2 when the mean torque ME_Mean is preferably greater than the threshold value Me_Threshold and the torque standard deviation ME DevStd is smaller than a lower threshold value Me_DevStd_Low, preferably lower than 5Nmm, for at least a time interval t1, preferably longer than 2 seconds.
  • the transition to the state S2 can occur from any other state (S0,S1) when the torque standard deviation ME_DevStd is greater than an upper threshold value Me_DevStd_High, preferably higher than 10 Nmm, for at least a time interval t2, preferably six seconds.
  • Said threshold values depend on the sizing of the hydraulic circuit of said dishwasher and of the motor comprised in said recirculation pump 31.
  • the recognition of the states S0 and S1 occurs within a maximum time equal to the higher value between t0 and t1 (max(t0,t1)), so as to ensure that the activation of the pump 31,36 for said maximum time will not pose a risk for its integrity, even in the worst operating conditions (vacuum or air inside).
  • said maximum time is such as to ensure safe operation of the heating resistor because, by immediately recognizing the switching to the state S0, the heating resistor can be turned off before it gets overheated; in said state S0, in fact, it is not certain that the heating resistor is immersed in wash or rinse liquid, and therefore it might be subject to overheating.
  • Said maximum time is preferably shorter than ten seconds.
  • the recognition of the state S2 advantageously allows taking actions to improve the wash performance and reduce the noisiness of the machine, as shown in Fig. 4 .
  • the dishwasher 1 When the dishwasher 1 is in the state S2 during the step P2, it means that there is foam or a clogged filter.
  • corrective measures can be taken which comprise the following steps:
  • the alternative procedure may comprise washing the filter 34 as described in Italian patent application ITTO2010A1044 by the present Applicant.
  • state machine FSM1 can ensure a longer operating life of the pump 31, by preventing it from rotating too long with no load or while sucking in air.
  • the operating variables of the dishwashing machine 1 sampled by the control unit 5 also comprise a quantity of supplied water WQ, which is measured by means of the turbine flow meter 40, and a number of revolutions per minute RPM of the motor of the pump 31.
  • the loading substep P1 comprises the following additional microsteps: empty condition verification/definition microstep SP1, static load microstep SP2, full condition verification microstep SP3, dynamic loading microstep SP4, and wash start microstep SP5.
  • microsteps are carried out orderly (SP1, SP2, SP3, SP4, SP5), one after the other.
  • SP1 it is checked that the tub 2 contains no residual liquid left therein by previous treatment cycles or released into the tub 2 from a storage tank (not shown in Fig. 1 ) possibly present in the dishwashing machine 1, or due to a malfunctioning valve 37.
  • the pump 31 is activated for a short period of time, while the control unit 5 verifies that the state machine FSM1 correctly stays in the state S0; in fact, should said state machine FSM1 switch to the state S1, it would mean that the tub 2 is not empty; should it switch to the state S2, instead, it would mean that the pump 31 is not operating correctly, i.e.
  • the pump 31 is kept off, and therefore the state machine FSM1 will remain in the state S0 for the whole duration of this substep, whereas the valve 39 is opened to cause water to flow into the tub 2 and turn the turbine flow meter 40. If the control unit 5 receives no signal from the flow meter 40, it means that either the meter 40 has failed or the flow 25 is zero. In order to understand which one of these two cases is taking place, the control unit 5 continues the execution of the microstep SP2 for a predetermined period of time, and then it switches to the microstep SP3 as predetermined.
  • the pump 31 is activated and the control unit verifies that the finite-state machine FSM1 correctly settles into the state S1. If the finite-state machine FSM1 is in the state S1 and the central unit 5 detected no signal from the flow meter 40 in the previous microstep SP2, it means that said meter 40 has failed; if the finite-state machine FSM1 stays in the state S0, it means that, with high probability, the flow 22 was practically equal to zero throughout the static load microstep SP2.
  • the control unit 5 starts the dynamic loading microstep SP4, during which the pump 31 is operating throughout the whole microstep SP3 and the valve 39 is left open to increase the quantity of water in the tub 2.
  • This substep ends when a predefined quantity of water has been supplied, i.e. a quantity of water sufficient to ensure a proper supply to the recirculation pump 31 as required by a given load configuration.
  • the load configuration can affect the time required by the water to fall onto the bottom of the tub 2 after it has been sprayed by the sprayers 21.
  • control unit 5 checks that the state machine FSM1 has correctly entered into the state S1 and carries out the wash start microstep SP5, wherein the valve 39 is closed and the pump 31 is brought to a normal-state speed equal to the speed that will be held during the holding substep P2.
  • the set of anomalous situations comprises a closed tap situation, a drain pipe leakage situation, an upturned concave container situation, and a clogged filter/foam presence situation, the latter having already been described above.
  • Fig. 6 shows the trend of the operating variables of the dishwashing machine 1 in the closed tap situation, i.e. when the flow 25 is always zero and no water is flowing into the tub 2. This situation can be identified by observing the state machine FSM1, which remains in the state S0 throughout the loading step P1; said step P1 must be fully completed for reasons that will be described more in detail below.
  • the state machine FSM1 in the drain pipe leakage situation, i.e. when there is continuous leakage from the bottom of the tub 2, the state machine FSM1 remains in the state S0 during the execution of the microsteps SP1-SP4, to enter then into the state S2 shortly after the beginning of the microstep SP5, following an increase in the revolution speed of the motor of the pump 31.
  • the control unit 5 outputs a state S2 more often than in the same microstep during a normal cycle (see Fig. 5 ); such a state is due to the presence of air and water entering the pump 31, thereby not allowing the motor to run in normal conditions, which are only obtained when there is a hydraulic head on the intake duct of the pump.
  • Figure 8 shows the trend of the operating variables of the dishwashing machine 1 in a situation in which a container has been improperly positioned with its concavity turned upwards. In this situation, the container will tend to accumulate liquid, thereby causing the state machine FSM1 to enter into the state S2, as opposed to the state S1, during the wash start microstep SP5, thus making this type of problem easily identifiable.
  • a control unit 5' similar to the control unit 5 of the main example, comprises also a second finite-state machine FSM2, which comprises a state S0' (initial state) and a state S1', similar to the states S0 and S1, respectively, of the state machine FSM1.
  • FSM2 finite-state machine
  • the second state machine FSM2 can estimate a part of the state of the dishwasher 1 by using operating variables calculated by starting from the electromechanical quantities of the motor of the drain pump 36.
  • Such operating variables comprise the mean torque ME_Mean', calculated on the basis of the phase currents measured by the inverter according to well-known relations; this calculation is preferably made every 32 mechanical revolutions of the motor of the pump 36, so as to obtain a higher resolution, and hence a faster intervention, than required for the recirculation pump 31 (128 mechanical revolutions). This is necessary because the drain step has a much faster dynamics than the recirculation step.
  • the transition to the initial state S0' can occur from the state S1' when the mean torque ME_Mean' is lower than a threshold value Me_Threshold', preferably lower than 80Nmm, for at least a time t0', preferably shorter than 10 seconds.
  • a threshold value Me_Threshold' preferably lower than 80Nmm
  • the transition to the state S1' can occur from the state S0' as soon as the mean torque ME_Mean' exceeds the threshold value Me_Threshold'.
  • the control unit 5' uses the state of the second state machine FSM2 during the drain step P3 (see Fig. 10 ).
  • the drain step P3 comprises a drain microstep SP6 and a pause microstep SP7; such microsteps may be repeated cyclically until the drain step is complete.
  • the drain pump 36 is on and its motor preferably runs at a speed of 3,200 rpm, as long as the second state machine FSM2 remains in the state S1'. As soon as the second state machine FSM2 enters into the state S0', the control unit 5' will start the pause microstep SP7.
  • the drain pump 36 is stopped, so that the wash and rinse liquid can flow down into the sump 23, and after a certain period of time the control unit 5' will start the drain microstep SP6 again.
  • control unit 5' will end the drain step P3 and will continue the wash program, in that no liquid will have remained in the tub 2.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (15)

  1. Lave-vaisselle (1) comprenant une cuve (2), une pompe de recirculation (31) pour faire recirculer un liquide contenu dans la cuve (2) et une pompe d'évacuation (36) pour évacuer ledit liquide de la cuve (2), des moyens de moteur électrique (31, 36) associés respectivement auxdites pompes (31, 36), une unité de commande (5, 5') pour acquérir et/ou traiter au moins un paramètre électromécanique associé à au moins l'un desdits moyens de moteur (31, 36) et commander un cycle de fonctionnement du lave-vaisselle, dans lequel l'unité de commande (5, 5') est configurée de façon à estimer, à des intervalles de temps prédéterminés, ledit au moins un paramètre électromécanique associé à au moins l'un desdits moyens de moteur électrique afin de détecter les situations de dysfonctionnement suivantes :
    - présence de mousse au sein de la cuve (2) dépassant un niveau préétabli ;
    - présence dans la cuve (2) d'un objet concave tourné vers le haut, qui empêche au moins en partie la circulation du liquide dans la cuve ;
    caractérisé en ce que
    l'unité de commande (5, 5') est également configurée pour détecter, au moyen de l'estimation dudit au moins un paramètre électromécanique associé à au moins l'un desdits moyens de moteur électrique, les situations de dysfonctionnement supplémentaires suivantes :
    - robinet fermé, qui arrête l'écoulement de l'eau dans la cuve (2) ;
    - fuite de liquide du lave-vaisselle (1).
  2. Lave-vaisselle (1) selon la revendication 1, dans lequel l'unité de commande (5, 5') acquiert en continu ledit au moins un paramètre électromécanique du moteur.
  3. Lave-vaisselle (1) selon la revendication 1 ou 2, dans lequel ledit au moins un paramètre électromécanique comprend le courant absorbé par chaque phase d'un moteur électrique associé à une pompe (31, 36) respective.
  4. Lave-vaisselle (1) selon la revendication 3, dans lequel le moteur de la pompe (31) est du type sans balai à aimant permanent triphasé, et dans lequel les moyens de moteur comprennent un circuit de puissance électronique comportant un onduleur.
  5. Lave-vaisselle (1) selon l'une quelconque des revendications précédentes, dans lequel l'unité de commande (5, 5') réalise, à des intervalles réguliers, un calcul d'une valeur moyenne (ME_Mean,ME_Mean') et/ou d'une valeur d'écart type (ME_DevStd,ME_DevStd') du couple délivré par les moyens de moteur associés aux pompes (31, 36).
  6. Lave-vaisselle (1) selon la revendication 5, dans lequel le calcul de la valeur moyenne (ME_Mean) du couple délivré par le moteur de la pompe de recirculation (31) est réalisé après un nombre de tours mécaniques dudit moteur supérieur à 100, de préférence tous les 128 tours.
  7. Lave-vaisselle (1) selon la revendication 5 ou 6, dans lequel le calcul de la valeur moyenne (ME_Mean') du couple délivré par le moteur de la pompe d'évacuation (36) est réalisé pour un nombre de tours mécaniques dudit moteur inférieur à celui du moteur associé à la pompe de recirculation (31), de préférence tous les trente-deux tours mécaniques dudit moteur de la pompe d'évacuation.
  8. Lave-vaisselle (1) selon l'une quelconque des revendications 5 à 7, dans lequel la fuite de liquide est détectée lorsque la valeur moyenne (ME_Mean) du couple délivré par le moteur de la pompe de recirculation (31) reste en dessous d'une première valeur seuil (Me_Threshold) pendant la majeure partie d'une sous-étape de chargement (P1) comprise dans le cycle de fonctionnement.
  9. Lave-vaisselle (1) selon l'une quelconque des revendications 5 à 8, dans lequel la situation de robinet fermé est détectée lorsque la valeur moyenne (ME_Mean) du couple est en dessous d'une première valeur seuil (Me_Threshold) pendant la durée totale d'une sous-étape de chargement (P1) comprise dans le cycle de fonctionnement.
  10. Lave-vaisselle (1) selon la revendication 8 ou 9, dans lequel la première valeur seuil (Me_Threshold) est inférieure à 50 Nmm.
  11. Lave-vaisselle (1) selon l'une quelconque des revendications 5 à 10, dans lequel la fuite de liquide est détectée lorsque la valeur moyenne (ME_Mean') du couple délivré par le moteur de la pompe d'évacuation (36) reste en dessous d'une seconde valeur seuil (Me_Threshold') juste après le démarrage d'une première micro-étape d'évacuation (SP6) comprise dans le cycle de fonctionnement.
  12. Lave-vaisselle (1) selon la revendication 11, dans lequel la seconde valeur seuil (Me_Threshold') est inférieure à 80 Nmm.
  13. Procédé de détection d'une situation de dysfonctionnement d'un lave-vaisselle selon l'une quelconque des revendications 1 à 12, comprenant les étapes de :
    a. calcul d'une valeur d'écart type (ME_DevStd) et d'une valeur moyenne (ME_Mean,ME_Mean') d'un couple délivré par un moteur associé à une pompe de recirculation (31),
    b. adoption de mesures correctives, si la valeur d'écart type de couple (ME_DevStd) dépasse une valeur seuil (Me_DevStd_High),
    caractérisé en ce que
    des mesures correctives sont également adoptées dans le cas où
    - la valeur moyenne (ME_Mean) du couple délivré par le moteur de la pompe de recirculation (31) reste en dessous d'une première valeur seuil (Me_Threshold) pendant la majeure partie d'une sous-étape de chargement (P1) comprise dans un programme de lavage,
    - la valeur moyenne (ME_Mean) délivrée par le moteur de la pompe de recirculation (31) reste en dessous de la première valeur seuil (Me_Threshold) pendant la durée totale d'une sous-étape de chargement (P1).
  14. Procédé selon la revendication 13, dans lequel la détection d'une fuite de liquide du lave-vaisselle comprend en outre les étapes de
    c. calcul d'une seconde valeur moyenne (ME_Mean') du couple délivré par un moteur compris dans une pompe d'évacuation (36),
    d. adoption de mesures correctives dans le cas où la seconde valeur moyenne (ME_Mean') du couple délivré par le moteur de la pompe d'évacuation (36) reste en dessous d'une seconde valeur seuil (Me_Threshold') juste après le démarrage d'une première micro-étape d'évacuation (SP6) comprise dans le programme de lavage.
  15. Procédé selon la revendication 13 ou 14, dans lequel les mesures correctives comprennent une signalisation de situation de fuite de liquide à un utilisateur.
EP12199559.1A 2011-12-30 2012-12-27 Lave-vaisselle et méthode de détection d'anomalies de fonctionnement. Active EP2609845B1 (fr)

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IT001249A ITTO20111249A1 (it) 2011-12-30 2011-12-30 Lavastoviglie e metodo per la rilevazione di una perdita di liquido da detta lavastoviglie
IT001246A ITTO20111246A1 (it) 2011-12-30 2011-12-30 Lavastoviglie e metodo per la rilevazione di schiuma all'interno di detta lavastoviglie
IT001248A ITTO20111248A1 (it) 2011-12-30 2011-12-30 Lavastoviglie e metodo per la rilevazione di un mancato afflusso di acqua all'interno di detta lavastoviglie
IT001247A ITTO20111247A1 (it) 2011-12-30 2011-12-30 Lavastoviglie e metodo per la rilevazione di uno o più recipienti posizionati con concavità rivolte verso l'alto all'interno di detta lavastoviglie

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WO2014071980A1 (fr) 2012-11-08 2014-05-15 Electrolux Home Products Corporation N. V. Détection d'un mode de fonctionnement d'un lave-vaisselle
US10595703B2 (en) 2015-11-10 2020-03-24 Electrolux Appliances Aktiebolag Method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods, and appliance and computer program therewith
PL3379991T3 (pl) 2015-11-25 2020-01-31 Electrolux Appliances Aktiebolag Ustalenie czy woda procesowa została dodana do zbiornika ściekowego urządzenia do mycia i płukania dóbr podczas przerwy w działaniu urządzenia
EP3393325B1 (fr) * 2015-12-22 2019-08-07 Arçelik Anonim Sirketi Lave-vaisselle et son procédé de commande
BR112018015642A2 (pt) 2016-02-15 2018-12-26 Electrolux Appliances Aktiebolag método para detectar uma alteração na vazão de água, aparelho para lavar e enxaguar utensílios, programa de computador e produto de programa de computador
WO2018153472A1 (fr) 2017-02-24 2018-08-30 Electrolux Appliances Aktiebolag Lave-vaisselle, procédé et système de commande pour gérer un état d'obstruction
CN111878379B (zh) * 2020-08-04 2022-10-18 上海明略人工智能(集团)有限公司 洗碗机的洗剂故障校验方法及装置、存储介质、电子装置
CN114108232B (zh) * 2021-12-02 2024-03-12 Tcl家用电器（合肥）有限公司 泡沫量预测方法、装置、存储介质以及洗涤设备

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