EP3801180B1 - Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique - Google Patents

Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique Download PDF

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Publication number
EP3801180B1
EP3801180B1 EP19729495.2A EP19729495A EP3801180B1 EP 3801180 B1 EP3801180 B1 EP 3801180B1 EP 19729495 A EP19729495 A EP 19729495A EP 3801180 B1 EP3801180 B1 EP 3801180B1
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Prior art keywords
dishwasher
sensor
washing
liquor
fresh water
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EP19729495.2A
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German (de)
English (en)
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EP3801180A1 (fr
Inventor
Andreas Heidel
Johannes Wölfle
Vitus HÖRMANN
Bernd KRÄNZLE
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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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
    • A47L15/42—Details
    • A47L15/421—Safety arrangements for preventing water damage
    • 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
    • A47L15/421—Safety arrangements for preventing water damage
    • A47L15/4212—Detection of water leaks; Collection of leaked water, e.g. in the casing
    • 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
    • A47L15/4225—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
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • 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
    • A47L15/4285—Water-heater arrangements
    • 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
    • A47L15/4293—Arrangements for programme selection, e.g. control panels; Indication of the selected programme, programme progress or other parameters of the programme, e.g. by using display panels
    • 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
    • A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
    • 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
    • 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
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • A47L15/4223—Devices for water discharge, e.g. devices to prevent siphoning, non-return valves
    • 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
    • A47L15/4244—Water-level measuring or regulating arrangements
    • 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
    • A47L15/4246—Details of the tub
    • 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
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of 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
    • A47L15/42—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
    • A47L2401/06—Water supply, circulation or discharge information
    • 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
    • A47L2401/07—Status of hydraulic components, e.g. open/close status of water inlet/outlet valves, operating position of water diverters
    • 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
    • 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
    • A47L2401/26—Loading door status, e.g. door latch opened or closed state
    • 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
    • A47L2401/34—Other automatic detections
    • 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
    • A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply

Definitions

  • the present invention relates to a dishwasher, a method for operating a dishwasher and a computer program product.
  • Conventional dishwashing machines in particular domestic dishwashing machines, have a number of valves which are opened or closed at different times during the execution of a washing program. Correct functioning of these valves is important in order to achieve a good flushing result. For example, it can happen that dirty washing liquor that has already been pumped out of the washing compartment flows back into the washing compartment due to a leaking outlet valve, which can lead to both re-soiling of the dishes and the formation of bad odors. Furthermore, in dishwashers that have a liquor reservoir, a defective outlet valve of the liquor reservoir can cause the stored liquid to run out and be pumped out, which is why there is then not a sufficient amount of liquid in the washing compartment, which could impair the washing result.
  • the U.S. 7,588,038 B2 describes a structure of a sump for a dishwasher.
  • the pump well has a large number of components, so there is an increased risk of flushing fluid being lost through a leak.
  • a sensor is used to determine if the flushing fluid is circulating properly. If this is not the case, it may be because there is a leak in the pump well, which is why there is not enough washing liquid in the dishwasher.
  • a dishwasher in particular a domestic dishwasher, with a washing chamber for washing items to be washed that can be arranged in the washing chamber using washing liquor, a control device for carrying out a washing program from a number of washing programs, a pump sump arranged at a lower end of the washing chamber for collecting the washing liquid and a drain pump arranged in the pump well for pumping washing liquid out of the pump well into a waste water hose, with a non-return flap for retaining the washing liquid pumped into the waste water hose being arranged between the drain pump and the waste water hose, and a sensor arranged in the pump well for Proposed output of a sensor signal depending on the presence of washing liquor at the sensor.
  • the control device is set up to determine a malfunction of a component of a hydraulic arrangement of the dishwasher as a function of the sensor signal and a current operating state of the dishwasher.
  • the current operating state here includes pumping out the washing liquor and the control device is set up to determine a leak in the non-return valve as a function of the sensor signal.
  • This dishwasher has the advantage that a large number of malfunctions or faults in components that are important for the operation of the dishwasher, and in particular also for a good washing result, can be determined with a very simple structure.
  • the sensor can now fulfill a dual function: on the one hand, the sensor signal can be used to determine the malfunction and, on the other hand, to determine contamination of the washing liquor during the execution of a washing program.
  • the proposed dishwasher has increased operational reliability and offers the possibility of reliably and clearly detecting malfunctions, so that a detected malfunction can be rectified with minimal effort.
  • the control device is designed in particular as the central control unit, which monitors and controls all functional components or elements of the dishwasher.
  • the control device can be implemented in terms of hardware and/or software.
  • the control device can be designed, for example, as a computer or as a microprocessor.
  • the control device can be embodied as a computer program product, as a function, as a routine, as part of a program code or as an executable object.
  • control device has a memory in which the number of washing programs is stored.
  • a washing program has, for example, different partial program steps, in particular a prewash, a cleaning, a final rinse and/or a drying. These sub-program steps are carried out in the implementation of a wash program in the respective order defined by the wash program and with the time intervals specified by the wash program.
  • a subprogram step is made up in particular of a number of different actions, such as opening an inlet valve to supply fresh water, activating a circulation pump, activating a heater and/or activating a drain pump to pump out washing liquor.
  • the current operating status of the dishwasher depends in particular on the current sub-program step and the last action carried out or started. Accordingly, the current operating status preferably includes all current operating parameters of the dishwasher, such as a current amount of washing liquor, a current circulating pump speed, a current washing liquor temperature and the like.
  • the wash liquor is understood to mean in particular fresh water to which dishwashing detergent has been added, but it can also mean any other liquid that is in the wash cabinet.
  • the terms water, fresh water, washing liquor, dirty washing liquor or liquid are therefore interchangeable.
  • the sump is located at the lower end of the wash cabinet. If the dishwasher is set up correctly, a liquid, in particular the washing liquor, will collect in the pump sump.
  • a circulating pump and a drain pump are arranged in the sump.
  • the pump well also has, for example, a sieve arrangement to collect coarse dirt.
  • the sensor for outputting the sensor signal is arranged, for example, on the side of the pump sump.
  • the sensor comprises an optical sensor.
  • the sensor signal output by the sensor changes as a function of the fluid surrounding the sensor, for example washing water or air, so that it can be determined as a function of the sensor signal whether the sensor is currently surrounded by washing water or air. For example, contamination of the washing liquor can also be determined as a function of the sensor signal.
  • the control device is set up to determine a malfunction of a component of a hydraulic arrangement of the dishwasher as a function of the current operating state of the dishwasher and the sensor signal.
  • a hydraulic arrangement is understood to mean, in particular, any water-carrying or washing-liquor-carrying arrangement, in particular valves and/or lines.
  • a connection device can be provided for supplying fresh water, which has an inlet valve and a flow sensor, for example an impeller meter.
  • This exemplary connection device has two components and forms, for example, a hydraulic arrangement.
  • the malfunction of a component can also be referred to below as a malfunction of the hydraulic system.
  • an inlet valve is provided for connecting the dishwasher to an external water supply line for supplying fresh water, the current operating state including the supply of fresh water and the control device being set up to indicate a malfunction of the fresh water supply via the inlet valve as a function of the sensor signal determine.
  • the inlet valve for connection to the external water supply line forms the hydraulic arrangement, for example.
  • fresh water is supplied.
  • the control device controls the intake valve accordingly, so that it opens. If water now flows into the sink, the sensor signal will change accordingly after a certain time, indicating that the sensor is surrounded by water. If this is not the case, it can be concluded that either the inlet valve is not correctly connected to the external water supply or that the inlet valve itself is defective and, for example, does not open.
  • the time interval that lies between the opening of the inlet valve and the change in the sensor signal when fresh water is supplied depends on various factors.
  • the volume per unit time depends on the pressure in the external water supply network and the size of the inlet valve. In Germany, a pressure of between 1 - 4 bar is assumed here, with 2 - 3 liters of water being fed in per minute, for example.
  • the volume of the sump and the arrangement of the sensor in the pump well play a role. For example, 0.5 liters of water are needed to put the sensor under water.
  • a specific time interval can be defined, for example, within which the sensor signal should change after the intake valve has been activated to open. With a water supply of 2.5 liters per minute and 0.5 liters of water required, the time interval is 12 seconds. If the sensor signal has not changed after the time interval has elapsed, the control device determines the malfunction.
  • a flow sensor for detecting the fresh water quantity supplied through the inlet valve is arranged between the inlet valve and the washing chamber, the control device being set up to detect a malfunction of the sensor, the flow sensor, depending on the fresh water quantity detected by the flow sensor and the sensor signal and/or to determine the intake valve.
  • the inlet valve forms a hydraulic arrangement with the flow sensor and the sensor.
  • the flow sensor will measure the amount of fresh water supplied and after the specified time interval, the sensor signal will change indicating that the sensor is surrounded by water. If the inlet valve malfunctions or is improperly connected to the external water supply line so that no or very little water is supplied, the flow sensor will measure that no water is supplied and also the sensor signal will not have changed after the time interval.
  • this embodiment has the advantage that the drain pump does not have to be activated and its current consumption monitored, as is usual in the prior art, in order to determine whether fresh water is getting into the washing compartment. This leads both to reduced noise development in this situation and to a longer service life for the circulating pump. In addition, even with a smaller amount of water, it is recognized that fresh water is getting into the wash cabinet than when the drain pump is used to detect it.
  • the flow sensor measures the amount of water supplied, the amount of water that the pump well absorbs until the sensor is surrounded by water can also be used instead of the time interval.
  • the flow sensor can also be arranged in front of the inlet valve or the inlet valve and the flow sensor form a structural unit.
  • the circulating pump is activated and the pump current is evaluated in order to determine whether there is water in the washing compartment or not. If it is determined that water is present, it can be concluded that both sensors are malfunctioning.
  • the dishwasher has a drain pump arranged in the pump sump for pumping washing liquor out of the pump well into a waste water hose, with a non-return valve for retaining the washing liquor pumped into the waste water hose being arranged between the drain pump and the waste water hose, the current operating state including pumping out the washing liquor and the control device is set up to determine a leak in the non-return valve as a function of the sensor signal.
  • the non-return valve can be understood as the hydraulic arrangement.
  • the non-return valve leaking can be referred to as the malfunction. If the non-return valve is working properly, the dishwashing water can only pass in one direction, namely from the drain pump into the waste water hose.
  • the waste water hose is connected to a waste water pipe at a height of about 80 cm.
  • the flushing water that has been pumped back up to this level in the waste water hose.
  • the drain pump is deactivated, no more washing liquid is pumped into the waste water hose, so that a certain static pressure acts on the non-return valve due to the water column in the hose. If the non-return valve is leaking, the flushing water will flow back into the sump due to this pressure. As a result, the washing liquor present in the washing compartment is soiled, which is why the cleaning of the items to be washed can no longer be reliable.
  • foul odors can also arise if the dirty washing liquor stands in the pump sump for a long time. If the dirty washing water now flows back through the leaking non-return valve, the sensor signal will change as soon as the sensor is surrounded by the dirty washing water. After the washing liquor has been pumped out, a certain time interval is therefore waited for, for example, to see whether the sensor signal changes. If this is the case, it can be concluded that the non-return valve is leaking.
  • control device is set up to determine the leakage of the non-return valve after the washing liquor has been pumped out and before fresh water is supplied to the washing compartment.
  • a liquor reservoir is provided for temporarily storing washing liquor, with a valve being arranged between the liquor reservoir and the washing compartment, which valve retains the temporarily stored washing liquor in the liquor reservoir when it is closed and the temporarily stored washing liquor into the washing compartment when it is open drains, wherein the current operating state includes filling the liquor reservoir with rinsing liquor and retaining the rinsing liquor in the liquor reservoir and the control device is set up to determine a leak in the valve as a function of the sensor signal.
  • the valve of the liquor accumulator forms the hydraulic arrangement and a leak in the valve is a malfunction.
  • the Fleet Storage serves, for example, to store a wash liquor that was used at the end of a wash program for rinsing and which is only very slightly soiled, for example, for the next wash cycle, with the temporarily stored wash liquor being able to be used in particular for pre-rinsing. In this way, water can be saved. If the valve of the liquor reservoir is leaking, the stored liquor will flow into the wash cabinet between two wash cycles.
  • the sensor signal can now be used to detect if liquid unexpectedly collects in the pump well between two flushing cycles, which indicates a leaking valve. For example, the sensor signal is recorded and evaluated at certain time intervals even when the dishwasher is switched off. The current operating status shows whether the fleet memory has been filled or not.
  • the drain pump is activated at the beginning of a wash cycle, for example, to pump liquid out of the sump, if the valve is leaking, the temporarily stored wash water would be pumped out, which is why there would not be enough wash water available for the subsequent pre-wash. Once the leaking valve has been identified, fresh water can then be added to ensure proper dishwasher operation.
  • control device is set up to determine the leakiness of the valve after the liquor reservoir has been filled and before the temporarily stored washing liquor is drained and/or fresh water is fed into the washing compartment.
  • a heat exchanger is provided for taking up fresh water to support a drying process and for heating the fresh water taken up, with a further valve being arranged between the heat exchanger and the washing chamber which, in a closed state, retains the fresh water in the heat exchanger and in an open state, the fresh water drains into the washing compartment, the current operating state being that the heat exchanger is filled with fresh water and the fresh water is retained in the heat exchanger and the control device is set up to determine a leak in the further valve as a function of the sensor signal.
  • the further valve forms the hydraulic arrangement and the leakage of the further valve is a malfunction.
  • the heat exchanger which is in thermal contact with the washing compartment, in the drying step, moisture from the air in the washing compartment is encouraged to condense on the walls of the washing compartment, thereby promoting the drying of the items to be washed.
  • the fresh water heats up.
  • the heated fresh water can be used in a subsequent rinsing cycle, which contributes to saving energy.
  • the function of determining the leak is as already described for the valve of the liquor store. In particular, the determination takes place between two flushing cycles.
  • control device is set up to determine the leakage of the further valve after the heat exchanger has been filled and before the fresh water taken in is drained and/or fresh water is fed into the washing compartment.
  • the dishwasher has a loading opening that can be closed with a door for loading the washing chamber with the items to be washed, the door being pivotably mounted from a closed position into an open position, with a door opening sensor for outputting a door opening signal depending on a current Door position is provided, wherein the current operating state includes loading the washing chamber with items to be washed and the control device is adapted to detect a supply of liquid through the loading opening as a function of the door opening signal and the sensor signal.
  • the senor is arranged in the pump sump and the pump sump is designed in such a way that the sensor with a washing liquor quantity of 0.4 liters, preferably 0.3 liters, more preferably less than 0.3 liters, in the pump sump is surrounded by washing liquid.
  • a user interface is provided which is set up to output a malfunction which has been determined.
  • the user interface includes in particular a display on the dishwasher and/or a communication unit, for example a modem and/or a network adapter. If a malfunction is detected, this can be shown on the display, for example. Furthermore, a corresponding message can be transmitted, for example, to a mobile device of the user of the dishwasher that is connected to the communication unit and/or to a server of the manufacturer or a customer service. In this way, the detected malfunction can be corrected quickly and professionally in a user-friendly manner. Because the malfunction an accurate The necessary spare parts are known and can be ordered if required. This also avoids customer service needing two appointments: a first appointment to diagnose the error and a second appointment to rectify the error. Overall, this significantly increases user-friendliness and also allows more efficient use of the dishwasher.
  • a communication unit for example a modem and/or a network adapter.
  • a memory unit is provided which is set up to store a detected malfunction, the user interface being set up to output the stored malfunction.
  • a malfunction initially does not have any serious effects on the dishwashing result, so that the user of the dishwasher may decide not to commission customer service to rectify the malfunction. For example, if the liquor reservoir valve is leaking, this leads to increased water consumption by the dishwasher, but the dishwashing result remains consistently good. If service becomes necessary at a later point in time for another reason, the malfunction stored in the memory unit can be read out using the user interface or output through it, so that this malfunction can also be rectified without a separate call from customer service.
  • a method for operating a dishwasher in particular a domestic dishwasher, is proposed.
  • the dishwasher comprises a washing chamber for washing items to be washed that can be arranged in the washing chamber using washing liquor, a control device for carrying out a washing program from a number of washing programs, a pump well arranged at a lower end of the washing chamber for collecting the washing liquor and a drain pump arranged in the pump well for Pumping of washing liquor from the pump well into a waste water hose, with a non-return valve for holding back the washing liquor pumped into the waste water hose being arranged between the drain pump and the waste water hose, and a sensor arranged in the pump well for outputting a sensor signal depending on the presence of washing liquor at the sensor .
  • a current operating state of the dishwasher determined. This is done in particular by the control device.
  • the sensor signal is recorded and output to the control device.
  • a malfunction of a hydraulic arrangement of the dishwasher is determined as a function of the current operating state and the sensor signal.
  • the current operating state includes pumping out the washing liquor, and a leak in the non-return valve is determined.
  • the proposed method is particularly suitable for use with the dishwasher or one of the embodiments of the dishwasher according to the first aspect.
  • a computer program product such as a computer program means
  • a server in a network, for example, as a storage medium such as a memory card, USB stick, CD-ROM, DVD, or in the form of a downloadable file. This can be done, for example, in a wireless communication network by transferring a corresponding file with the computer program product or the computer program means.
  • the 1 shows a schematic perspective view of a dishwasher 1, which is presently embodied as a domestic dishwasher.
  • the domestic dishwasher 1 includes a washing compartment 2, which can be closed by a door 3, which is in particular watertight.
  • a sealing device can be provided between the door 3 and the washing container 2 .
  • the washing container 2 is preferably cuboid.
  • the washing compartment 2 can be arranged in a housing of the domestic dishwasher 1 .
  • the washing compartment 2 and the door 3 can form a washing chamber 4 for washing items to be washed.
  • Door 3 is in the 1 shown in their open position.
  • the door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3 .
  • a loading opening 6 of the washing compartment 2 can be closed or opened.
  • the washing compartment 2 has a base 7, a cover 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 arranged opposite one another.
  • the bottom 7, the top 8, the rear wall 9 and the side walls 10, 11 can be made from a stainless steel sheet, for example.
  • the bottom 7 can be made of a plastic material.
  • the household dishwasher 1 also has at least one washware holder 12 to 14 .
  • washware holder 12 being a lower washware holder or a lower rack
  • washware holder 13 being an upper washware holder or an upper rack
  • washware holder 14 being a cutlery drawer.
  • the washing items receptacles 12 to 14 are arranged one above the other in the washing compartment 2 .
  • Each washware holder 12 to 14 can be moved either into or out of the washing compartment 2 .
  • each washware receptacle 12 to 14 can be pushed or moved into the washing compartment 2 in an insertion direction E and pulled out or moved out of the washing compartment 2 in an extension direction A counter to the insertion direction E.
  • a control device 20 is arranged on the door 3 of the dishwasher 1, which is implemented here, for example, in terms of hardware and is set up to carry out one washing program from a number of washing programs.
  • a sensor 40 and a hydraulic arrangement 30 are arranged at the lower end of the washing chamber 4 at the lower end of the washing chamber 4 .
  • the sensor 40 is set up for a sensor signal 102 (see Figures 5-7 ) indicating what fluid is currently surrounding the sensor 40, such as air or dishwater.
  • the sensor 40 can also be set up to determine the degree of contamination of the washing liquor.
  • the hydraulic arrangement 30 comprises a check valve 36 (see FIG 3 ), which is arranged between a drain pump and a waste water hose 70.
  • the control device 20 is also set up to detect or determine a current operating state of the domestic dishwasher 1 .
  • the current operating state of the domestic dishwasher 1 depends in particular on a current partial program step that is being carried out in the washing program that is being carried out and the last action that was carried out or started. Accordingly, the current operating status includes all current operating parameters of the household dishwasher 1, such as a current amount of washing liquor, a current circulating pump speed, a current washing liquor temperature and the like.
  • the control device 20 is set up to determine a malfunction of the hydraulic arrangement 30 as a function of the current operating state and the sensor signal 102 . Concrete exemplary embodiments in this regard are explained with reference to the figures described below.
  • the 2 shows a schematic view of a second dishwasher 1, which is designed as a domestic dishwasher and in particular all the components as for the domestic dishwasher 1 explained, has, even if this in the 2 are not shown.
  • the household dishwasher 1 is in the 2 shown in a schematic side view.
  • the pump sump 50 is arranged at the lower end of the washing container 4 and the sensor 40 is arranged on the side wall of said sump.
  • the sump 50 may also have various strainer assemblies, which for the sake of clarity in FIG 2 are not shown.
  • the hydraulic arrangement 30 which here includes a water connection with an inlet valve 32 and a flow sensor 34 , is shown to the side next to the washing chamber 4 .
  • the flow sensor 34 is set up to measure the amount of fresh water supplied.
  • the inlet valve 32 is connected to an external water supply line 60 .
  • the arrow in the water supply line 60 indicates the flow direction of the water when the inlet valve 32 is open.
  • the hydraulic arrangement 30, in particular the inlet valve 32 or the flow sensor 34, or also the sensor 40 have a malfunction or a defect.
  • the flow sensor 34 measures the quantity of fresh water supplied, which is indicated by a rising sensor signal 104 (see figure 5 ) is recognizable.
  • the flow sensor 34 is designed, for example, as an impeller meter that emits a pulse for every 5 ml of liquid that passes through the impeller meter.
  • ⁇ t time interval
  • the sump 50 will be filled with the supplied fresh water to such an extent that the sensor 40 is now surrounded by the fresh water.
  • the sensor signal 102 changes accordingly, from which it can be deduced that the sensor 40 is surrounded by water.
  • the figure 5 shows an example of the time course of the sensor signal 102 of the sensor 40 and the sensor signal 104 of the flow sensor 34, as can occur in this scenario.
  • the inlet valve 32 has a malfunction or the domestic dishwasher 1 is not properly connected to the external water supply line 60, so that no or only very little fresh water can be supplied.
  • the controller 20 has commanded the inlet valve 32 to open, the flow sensor 34 will not measure water flow.
  • the sensor signal 102 will also not have changed after the specific time interval ⁇ t. It can therefore be deduced that fresh water is not supplied and therefore there is a problem with the inlet valve 32 or the connection to the water supply line 60 .
  • the flow sensor 34 has a malfunction.
  • the flow sensor 34 does not emit a measurement signal at all or it emits an erroneous measurement signal. This can be due to the flow sensor 34 being defective or blocked, for example.
  • no measurement signal from the flow sensor 34 is detected, for example, which indicates that no fresh water is being supplied.
  • the sensor signal 102 changes its level after the specific time interval ⁇ t, one can conclude from this situation that the flow sensor 34 has a malfunction.
  • the 6 shows an example of the time course of the sensor signal 102 of the sensor 40 and the sensor signal 104 of the flow sensor 34, as can occur in this scenario.
  • the sensor 40 in the sump 50 has a malfunction. After the inlet valve 32 has opened, the flow sensor 34 will output the expected measurement signal, which indicates that fresh water is being supplied properly. But even after the required amount of fresh water has been supplied, the sensor signal 102 will not change, since the sensor 40 is defective. The defective sensor 40 can therefore be clearly identified.
  • FIG. 3 shows a schematic view of an embodiment of a dishwasher 1, according to the present invention, which is designed as a domestic dishwasher and in particular all components as for the domestic dishwasher of FIG 1 and 2 explained, has, even if this in the 3 are not shown.
  • the household dishwasher 1 is in the 3 shown in a schematic side view.
  • the pump sump 50 is arranged at the lower end of the washing chamber 4 and the sensor 40 is arranged on the side thereof.
  • a drain pump no reference number
  • a non-return valve 36 which is designed to pump the rinse water into the
  • waste water hose 70 Let the waste water hose 70 through, but do not let the washing liquor present in the waste water hose 70 back into the sump 50 and thus into the washing area 4 .
  • the waste water hose 70 is in turn connected to a waste water line which is, for example, at a height of about 80 cm above the connection to the pump well 50 (not shown).
  • the non-return valve 36 If, after the dirty washing water has been pumped out, for example after cleaning, the non-return valve 36 malfunctions because, for example, food residue has gotten caught in it and prevents the non-return valve 36 from closing tightly, part of the washing liquid is released from the waste water hose 70 into the pump sump 50 flow back. After a certain time interval ⁇ t (see 7 ) the pump sump 50 will have filled up to such an extent that the sensor 40 is again surrounded by the dirty washing liquor. This can be determined using the sensor signal 102 output by the sensor 40 . The 7 shows an example of a time course of the sensor signal 102 of the sensor 40, as it could occur in this scenario. In this way, it can therefore be concluded that the non-return valve 36 is malfunctioning and it negative effects, such as a poor washing result or the development of bad odors, can be avoided.
  • FIG. 4 shows a schematic view of a fourth dishwasher 1, which is designed as a domestic dishwasher and in particular all the components as for the domestic dishwasher 1 explained, has, even if this in the 4 are not shown.
  • the domestic dishwasher 1 is in the 4 shown in a schematic side view.
  • the pump sump 50 is arranged at the lower end of the washing chamber 4 and the sensor 40 is arranged on the side thereof.
  • a liquor reservoir 80 is arranged on the side of the household dishwasher 1 and is connected to the washing compartment 4 via two connecting lines (no reference numerals).
  • a circulating pump which is used to fill the liquor store 80 with rinsing liquor by pumping the rinsing liquor into the liquor store 80 .
  • the liquor store 80 is used for temporarily storing washing liquor in order to use it at a later point in time, in particular in a later wash cycle.
  • the valve 38 holds back the washing liquor in the liquor reservoir 80 .
  • the contents of the liquor reservoir 80 will spill even though the valve 38 is considered closed. Accordingly, the content of the liquor store 80 is no longer available at a later point in time when the temporarily stored washing liquor is to be used. If the spilled washing liquor has been pumped out in the meantime, for example at the beginning of the next wash cycle, there is not enough washing liquor in the washing compartment 4 to ensure a good washing result.
  • the sensor signal 102 (see Figures 5 - 7 ) is evaluated at regular intervals while the washing liquor is being stored in the liquor reservoir 80, it can be determined whether the valve 38 is leaking if the pump sump 50 is filled with washing liquor despite the valve 38 being closed.
  • a heat exchanger can be provided which, like the liquor store 80, is connected to the domestic dishwasher 1, but in thermal contact with it the washing compartment 4, so that a drying-supporting effect can be achieved by filling cold fresh water into the heat exchanger.
  • a further valve which is set up to hold back the fresh water in the heat accumulator, can be checked for a malfunction, in particular a leak.
  • the Figures 5 and 6 each show an exemplary diagram of a course of sensor signals 102, 104 of a flow sensor 34 (see 2 ) and a sensor 40 of a household dishwasher 1, for example the household dishwasher 1 of 2 .
  • the sensor signals 102, 104 change along a time axis t depending on the current operating state of the domestic dishwasher 1.
  • the inlet valve 32 of the domestic dishwasher 1 is opened so that fresh water is supplied.
  • the sensor signal 104 of the flow sensor 34 then rises linearly.
  • the sensor signal 102 of the sensor 40 changes at a point in time t1.
  • the sensor signal 102 changes as follows along the time axis t:
  • the sensor signal 102 initially has a high level, which indicates that the sensor 40 is surrounded by washing liquor.
  • the drain pump is activated in order to pump out the washing liquor.
  • the washing liquor has been pumped out to such an extent, for example, that the sensor 40 is now surrounded by air, which is why the level of the sensor signal 102 drops.
  • the level of the sensor signal 102 rises again.
  • a current operating state of the domestic dishwasher 1 is determined. This is done in particular by the control device 20 of the domestic dishwasher 1.
  • a sensor signal 102 of a sensor 40 arranged in a pump sump 50 is detected and output to the control device 20.
  • a malfunction of a component 32-38 of a hydraulic arrangement 30 of the household dishwasher 1 is determined as a function of the current operating state and the sensor signal 102.

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

Claims (14)

  1. Lave-vaisselle (1), en particulier lave-vaisselle électroménager, comprenant un espace de lavage (4) pour laver des articles à laver rangés dans l'espace de lavage (4) au moyen d'un bain de lavage, un dispositif de commande (20) pour l'exécution d'un programme de lavage parmi un nombre de programmes de lavage, un boîtier pour pompe (50) se trouvant sur une extrémité inférieure de l'espace de lavage (4) servant à recueillir le bain de lavage et une pompe à lessive se trouvant dans le boîtier pour pompe (50) servant à vidanger par pompage le bain de lavage du boîtier pour pompe (50) dans un tuyau des eaux usées (70), un clapet anti-retour (36) se trouvant entre la pompe à lessive et le tuyau des eaux usées (70), pour retenir le bain de lavage pompé dans le tuyau des eaux usées (70), et un détecteur (40) situé dans le boîtier pour pompe (50) pour émettre un signal de détection (102) en fonction de la présence du bain de lavage près du détecteur (40), le dispositif de commande (20) servant à détecter, en fonction du signal de détection (102) et d'un statut de fonctionnement réel du lave-vaisselle (1), le dysfonctionnement d'un module (32, 34, 36, 38) d'un arrangement hydraulique (30) du lave-vaisselle (1), le statut de fonctionnement réel comprenant une vidange par pompage du bain de lavage, et le dispositif de commande (20) servant à détecter, en fonction du signal de détection (102), un défaut d'étanchéité du clapet anti-retour (36).
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce qu'une soupape d'admission (32) est prévue, qui raccorde le lave-vaisselle (1) à une conduite d'alimentation en eau (60) externe pour amener de l'eau douce, le statut de fonctionnement réel comprenant l'amenée de l'eau douce et le dispositif de commande (20) servant à détecter, en fonction du signal de détection (102), un dysfonctionnement de l'amenée en eau douce par le biais de la soupape d'admission (32).
  3. Lave-vaisselle selon la revendication 2, caractérisé en ce qu'un détecteur de circulation (34) se trouve entre la soupape d'admission (32) et l'espace de lavage (4), qui calcule la quantité d'eau douce amenée par la soupape d'admission (32), le dispositif de commande (20) servant à détecter, en fonction de la quantité d'eau douce calculée par le détecteur de circulation (34) et du signal de détection (102), un dysfonctionnement du détecteur (40), du détecteur de circulation (34) et/ou de la soupape d'admission (32).
  4. Lave-vaisselle selon l'une des revendications 1 - 3, caractérisé en ce que le dispositif de commande (20) sert à la détection d'un défaut d'étanchéité du clapet anti-retour (36) après une vidange par pompage du bain de lavage et avant l'amenée d'eau douce dans l'espace de lavage (4).
  5. Lave-vaisselle selon l'une des revendications 1 - 4, caractérisé en ce qu'un réservoir de bain (80) est prévu pour la réserve temporaire d'un bain de lavage, une soupape (38) se trouvant entre le réservoir de bain (80) et l'espace de lavage (4), laquelle retient, à l'état fermé, le bain de lavage temporairement en réserve dans le réservoir de bain (80) et évacue, ouverte, dans l'espace de lavage (4), le bain de lavage temporairement en réserve, le statut de fonctionnement réel, comprenant le remplissage du réservoir de bain (80) avec un bain de lavage et une retenue du bain de lavage dans le réservoir de bain (80) et le dispositif de commande (20) servant à détecter, en fonction du signal de détection (102), un défaut d'étanchéité de la soupape (38).
  6. Lave-vaisselle selon la revendication 5, caractérisé en ce que le dispositif de commande (20) sert à détecter un défaut d'étanchéité de la soupape (38) après remplissage du réservoir de bain (80) et avant l'évacuation du bain de lavage temporairement en réserve et/ou une amenée d'eau douce dans l'espace de lavage (4).
  7. Lave-vaisselle selon l'une des revendications 1 - 6, caractérisé en ce qu'un échangeur de chaleur est prévu pour prélever de l'eau douce servant au processus de séchage et à chauffer l'eau douce prélevée, une nouvelle soupape se trouvant entre l'échangeur de chaleur et l'espace de lavage (4), laquelle, fermée, retient l'eau douce dans l'échangeur de chaleur et, ouverte, laisse aller l'eau douce dans l'espace de lavage (4), le statut de fonctionnement réel comprenant le remplissage de l'échangeur de chaleur avec de l'eau douce et une retenue de l'eau douce dans l'échangeur de chaleur et le dispositif de commande (20) servant à détecter, en fonction du signal de détection (102), un défaut d'étanchéité de la nouvelle soupape.
  8. Lave-vaisselle selon la revendication 7, caractérisé en ce que le dispositif de commande (20) sert à détecter un défaut d'étanchéité de la nouvelle soupape après remplissage de l'échangeur de chaleur et avant l'évacuation de l'eau douce prélevée et/ou l'amenée de l'eau douce dans l'espace de lavage (4).
  9. Lave-vaisselle l'une des revendications 1 - 8, caractérisé en ce que le lave-vaisselle (1) comprend une ouverture de chargement (6), qu'on peut refermer avec une porte (3), servant au chargement de l'espace de lavage (4) avec des articles à laver, la porte (3) étant positionnée pivotant d'une position fermée dans une position ouverte, un détecteur d'ouverture de porte étant prévu pour émettre un signal d'ouverture de porte en fonction de la position réelle de la porte, le statut de fonctionnement réel comprenant le chargement de l'espace de lavage (4) avec des articles à laver et le dispositif de commande (20) servant à détecter, en fonction du signal d'ouverture de porte et du signal de détection (102), une amenée de liquide par l'ouverture de chargement (6).
  10. Lave-vaisselle selon l'une des revendications 1 - 9, caractérisé en ce que le détecteur (40) se trouve ainsi dans le boîtier pour pompe (50) et que le boîtier pour pompe (50) est ainsi réalisé, que le détecteur (40), en cas de quantité de bain de lavage de 0,4 litre, de préférence de 0,3 litre, encore préférablement de moins de 0,3 litre, est, dans le boîtier pour pompe (50), entouré du bain de lavage.
  11. Lave-vaisselle selon l'une des revendications 1 - 10, caractérisé en ce qu'une interface d'utilisateur est prévue, laquelle exprime un dysfonctionnement détecté.
  12. Lave-vaisselle selon la revendication 11, caractérisé en ce qu'une unité réservoir est prévue servant à mettre en mémoire un dysfonctionnement détecté, l'interface d'utilisateur servant à exprimer le dysfonctionnement mémorisé.
  13. Procédé de fonctionnement d'un lave-vaisselle (1), en particulier d'un lave-vaisselle électroménager, comprenant un espace de lavage (4) destiné au lavage d'articles à laver rangés dans l'espace de lavage (4) au moyen d'un bain de lavage, un dispositif de commande (20) qui exécute un programme de lavage parmi un nombre de programmes de lavage, un boîtier pour pompe (50) se trouvant sur une extrémité inférieure de l'espace de lavage pour recueillir le bain de lavage et une pompe à lessive se trouvant dans le boîtier pour pompe (50) servant à vidanger par pompage le bain de lavage du boîtier pour pompe (50) dans un tuyau des eaux usées (70), un clapet anti-retour (36) pour la retenue du bain de lavage pompé dans le tuyau des eaux usées (70) se trouvant entre la pompe à lessive et le tuyau des eaux usées (70), et un détecteur situé dans le boîtier pour pompe (50) pour l'émission d'un signal de détection (102) en fonction de la présence du bain de lavage près du détecteur (40), comprenant les étapes suivantes :
    détection (S1) d'un statut de fonctionnement de réel du lave-vaisselle (1),
    saisie (S2) du signal de détection (102) et émission du signal de détection (102) sur le dispositif de commande (20), et
    détection (S3) du dysfonctionnement d'un module (32, 34, 36, 38) d'un arrangement hydraulique (30) du lave-vaisselle (1) en fonction de l'état réel de fonctionnement et du signal de détection (102) saisi, le statut réel de fonctionnement comprenant une vidange par pompage du bain de lavage et un défaut d'étanchéité du clapet anti-retour (36) étant détecté.
  14. Produit de programme informatique, lequel comprend des instructions faisant que le lave-vaisselle selon l'une des revendications 1-12, permet l'exécution du procédé selon la revendication 13.
EP19729495.2A 2018-06-07 2019-06-04 Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique Active EP3801180B1 (fr)

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DE102018209076.9A DE102018209076A1 (de) 2018-06-07 2018-06-07 Geschirrspülmaschine, Verfahren zum Betreiben einer Geschirrspülmaschine und Computerprogrammprodukt
PCT/EP2019/064517 WO2019234040A1 (fr) 2018-06-07 2019-06-04 Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique

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US20210235963A1 (en) 2021-08-05
EP3801180A1 (fr) 2021-04-14
DE102018209076A1 (de) 2019-12-12
WO2019234040A1 (fr) 2019-12-12
CN112236066A (zh) 2021-01-15
PL3801180T3 (pl) 2024-02-19

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