EP0748892B1 - Waschmaschine mit Vorrichtung und Verfahren zur Steuerung der Spülung - Google Patents
Waschmaschine mit Vorrichtung und Verfahren zur Steuerung der Spülung Download PDFInfo
- Publication number
- EP0748892B1 EP0748892B1 EP96201658A EP96201658A EP0748892B1 EP 0748892 B1 EP0748892 B1 EP 0748892B1 EP 96201658 A EP96201658 A EP 96201658A EP 96201658 A EP96201658 A EP 96201658A EP 0748892 B1 EP0748892 B1 EP 0748892B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- detergent
- machine
- rinsing
- ionic concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/20—Washing liquid condition, e.g. turbidity
- D06F2103/22—Content of detergent or additives
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
Definitions
- the present invention refers to a washing-machine, in particular a laundry washer, as described in the preamble of the annexed Claim 1.
- the laundry washer executes the socalled rinse cycles, with the washer drum containing the clothes carrying out motion steps with fresh water from the mains.
- the rinses usually a restricted number (normally four) are completed each one by a water discharge, a short spinning and a further discharge of the water being wringed out of the clothes during said spinning step.
- the quantity of water used for the rinses and their number in the machines according to the known state of art are substantially fixed, and depend upon the parameters preset at the design stage of the machine control system.
- the volume of water taken in for each rinse depends on the configuration of a sensor with a fixed level, eg. a pressure switch (controlling input of water preset quantities), whereas the number of rinse steps depend on the kind of the preset wash-cycle and each cycle always will execute that specific number of rinses.
- laundry washers which are provided with a push-button to add at least a rinse step to the ones usually preset by the wash-cycle or to increase water level for the rinsing steps.
- the user can press said push-button for a more efficient rinse.
- a setting merely reflects a "quantitative" and approximate solution, being an open-ring adjustment, in the sense that if on one hand the pressure of said push-button surely determines a higher water consumption, on the other hand it does not necessarily warrant a full achievement of the desired result, i.e. a full removal of detergent residues.
- Such a result is related to several factors, such as for instance the quantity of detergent introduced by the user into the machine, water hardness from the mains, type of fabric for the laundry to be washed and its quantity.
- said object is obtained by a washing-machine having the characterizing features of the annexed claims 1 and 10; further embodiment of the invention are contained in the dependent claims.
- the washing machine according to the present invention specifically a laundry washer, comprises a control unit of the type with a microcontroller, containing appropriate programme information codified in associated permanent memory means.
- the control unit also contains available information of specific physical characteristics of the washing fluid through proper sensing means.
- the machine according to the present invention also comprises a selecting device, consisting eg. of a rotary knob actuated by the user to indicate the required rinsing performance to the control unit.
- the user is actually able to operate a qualitative choice through said selecting device for the type of rinsing to be carried out by the machine.
- Fig. 1 shows schematically said knob as indicated by M, through which the user can choose a position comprised between two opposite extreme values: a position for a minimum water consumption indicated by MC and a position for a highest rinsing performance, indicated by MR.
- the machine according to the invention has an adequate device to measure washing water resistivity; a possible embodiment of which is described in Fig. 2.
- Said measuring device of the washing water resistivity inside the laundry washer according to the present invention comprises two electrodes, shown in fig. 2 with the letters A and B.
- Electrode A consists of an electrically conductive element directly in contact with the washing water, where in the instance of Fig. 2 coincides with the metal structure V itself of the machine (tub-drum assembly) but could also be separated by an adequate rubber seal.
- Electrode B consists of an electrically conductive element directly in contact with the washing water and isolated against electrode A.
- Said current flow will feed a charge transient of capacitor C and stop upon conclusion of said transient state, i.e. when voltage at capacitor C terminals equals the value of E.
- the transient is generated by the microcontroller MP and its duration depends on the capacity value of capacitor C and on the resistivity value of the medium (washing water) through which the charge current is flowing.
- charge time can be measured by any microcontroller available on the market MP (4 or 8 bit configuration) capable of measuring the time with a good resolution (eg. in the order of 1 microsecond).
- a digital input of microcontroller MP is connected with the terminals of capacitor C, whereas a digital output, called OUT, is used to pilot a transistor Q, which is used as a control switch for the transient whose manifold is in its turn connected with capacitor C terminals.
- Charge time for capacitor C is measured by the following operations of microcontroller MP:
- the microcontroller MP has a program codified in its permanent ROM memory to calculate the fluid resistivity in relation to the measurement of the charge time of said capacitor.
- Said information also enables the control system of the laundry washer according to the present invention to detect the presence of washing agents in the water; as a matter of fact, the value of ionic concentration in the water - proportional to the quantity of washing agent dissolved in water - can be desumed with the aid of an appropriate table by measuring the fluid resistivity after introduction of said washing agent.
- Fig. 3 shows graphically by way of example the result of an experimental investigation showing the existing relation between the detergent concentration and the resistivity, as detected with the device of fig. 2, expressed in grams per liter at a temperature of 20°C (water hardness 30°F).
- M indicates the above selection device or knob interacting with the resistivity metering device and microcontroller Mp to set the required rinsing type; said knob M can eg. consist of a simple potentiometer with variable resistance according to its angular position; as said previously, the knob M provides a plurality of selectable positions ranging from a highest rinsing quality (MR) to a minimum water consumption (MC).
- MR rinsing quality
- MC minimum water consumption
- each selectable position of knob M refers to a determined concentration of detergent residue in the water from the last rinse.
- detergent concentration in the water from the last rinse carried out by the machine shall be as little as possible, compatibly with a water consumption restricted to a certain max value as preset by the machine control system at design stage and based on relevant standards (as it will be further explained).
- residual detergent concentration shall anyway be compatible with preset limits.
- said limits shall be based on the socalled ECO-Label Guideline indicating that detergent concentration of the last rinse carried out by the machine should at least be 60 times lower than the one of the last wash step.
- the user loads the clothes for washing, selects the required wash cycle in a usually known manner and sets the desired rinsing performance through the knob M; then he starts the machine eg. actuating a proper start-button.
- each position of the knob M corresponds to a well determined ionic concentration of the water, which is indicative of the quantity of detergent residues still available in the water from the last rinse. Therefore, once the control unit is aware of knob M position, also the residual detergent concentration to be reached during the last rinse of the machine will be determined, so as to end the wash-cycle.
- the nonvolatile memory means related to the microcontroller MP may include codified data indicating for each position of the knob M a corresponding value or a range of values for the ionic concentration that water should have at the end of the rinse process.
- the microcontroller MP will measure either the ionic or detergent concentration degree of the water during the last washing step through the measuring device shown in Fig. 2 and store said value in an adequate memory register, such as for instance a nonvolatile EEPROM type memory.
- the rinses are executed before ending the wash cycle; let us assume, to this purpose, that also the machine according to the present invention will normally execute at least two rinses.
- the microcontroller MP At the end of the second rinse and before discharging its water the microcontroller MP will measure - always through the device shown in Fig. 2 - the ionic or detergent concentration degree of the water during said final rinse.
- the microcontroller MP will compare the ionic concentration value of the water measured at the end of the wash cycle with the ionic concentration value at rinse end (as said above, starting from said ionic concentration data the control system can trace back the quantity of detergent residues available in the water). As already mentioned, this comparison is achieved by the microcontroller MP bearing in mind that in agreement with the criteria dictated by ECO-Label Guideline, whenever the condition of least water consumption (MC) is selected, the detergent concentration during the final rinse shall be at least 60 times lower than the detergent concentration detected during the last wash.
- MC condition of least water consumption
- the relationship between the detergent concentration at wash end and the one at the end of each rinse is defined herein as a diluition relationship of the residual detergent concentration.
- the criteria at rinse end consists in reaching a determined diluiton relationship of the residual detergent concentration ranging from a minimum value, eg. 60 for the position MC of least water consumption (in agreement with ECO-Label Guideline) to a max value (eg. 600 for the position MR of highest rinse performance).
- a minimum value eg. 60 for the position MC of least water consumption (in agreement with ECO-Label Guideline)
- max value eg. 600 for the position MR of highest rinse performance.
- all intermediate positions from minimum to maximum values between both limit positions are included, in agreement with the actual position selected with the knob M.
- control unit compares the value of the water from the second rinse, the value of the last washing step and the data set by the user through the knob M. If the detergent concentration of the water from the second rinse is at least 60 times lower than the one from the last washing step, the rinsing process will stop, the water from the second rinse discharged and spinning executed.
- control system will enable water discharge from the second rinse, carry out the normal spinning step following each rinse with related water discharge and start a third rinse with fresh water.
- control unit will measure again the ionic concentration of the water and make a new data comparison.
- the machine will operate exactly as described above, since the control unit compares the ionic concentration value of the water from the second rinse with the one from the last washing step and the value set by the user through the knob M. If the value of the detergent concentration in the water from the second rinse is compatible with the one set by the user through the knob M, then the rinsing process will terminate, the water from the second rinse is discharged and a relevant spinning will follow.
- control system will enable water discharge from the second rinse, the usual spinning step following each rinse and related water discharge, then start a third rinse with fresh water. At the end of said third rinse the control unit will measure again the ionic concentration of the water and make a new data comparison.
- the "loop" can be repeated, theoretically, till the concentration value from the last rinse step equals the one set by the user. Also in this case it may prove convenient - at logic control circuit level - to set a maximum value for water consumption.
- Fig. 4 shows schematically the block diagram of a part of a likely control logic circuit of the laundry washing-machine according to the present invention.
- Block 200 is the logic flow start block, to start a previously selected wash cycle; then control goes to block 201 to check the selected wash cycle type and from block 201 to block 202 to check the required rinse type, i.e. the selection actuated by the user through the knob M.
- Control goes then to block 203, wash-cycle start, to start water by which the first water supply is obtained and the various steps are executed up to actual washing end.
- Control goes to block 204 to calculate the ionic concentraction of the water from the last rinse according to the selected wash-cycle.
- Control goes to block 205 to check the first rinse, then to block 206 to execute a second rinse.
- Control goes to block 207 to calculate the ionic concentration degree of the water at the end of the second rinse.
- Control goes to block 208, a test block, to check compatibility between the set value of the ionic concentration and the one actually measured.
- control goes to block 209 to terminate the wash cycle; in the negative (NO), control goes back to block 206 to execute a new rinse and a new measurement of the ionic concentration.
- the cycle or "loop" 206-208 will then be repeated till the rinse water tested from block 206 reaches the required ionic concentration level.
- the washing machine operates as follows.
- the user loads the clothes to be washed, sets the required wash-cycle in a usual known manner and always using the knob M he sets the desired rinse performance. After said operations the user starts the machine.
- the microcontroller MP measures through the measuring device shown in Fig. 2 the resistivity degree of the water at the inlet and calculates both its relevant hardness and ionic concentration degrees.
- the machine control system is informed about the minimum ionic concentration degree available, i.e. the ionic concentration degree of fresh water from the mains feeding the machine.
- the ionic concentration degree of the water mains can vary from place to place and in the same place from season to season.
- the machine proceeds further with its normal operation and executes the normal washing steps according to the wash-cycle selected by the user. Rinses are carried out before cycle end. Let us assume that also the machine according to the above suggested embodiment normally executes at least two rinses.
- the microcontroller MP calculates through the measuring device shown in Fig. 2 and as already described above the ionic concentration degree of the water inside the tub, i.e. the water used for the second rinse and from this value the control system will obtain the quantity of detergent residues in the water from said rinse.
- the control unit will then compare the ionic concentration of the water from the second rinse with the ionic concentration value set by the user through the knob M.
- control unit compares the value related to the water from the second rinse with the value of the initial water supplied from the mains. If both data are compatible the rinse process will end and the water from the second rinse discharged followed by spinning.
- control system will enable water discharge from the second rinse, the normal spinning step following each rinse and its discharge, then start a third rinse with clean water. At the end of said third rinse the control unit will measure the ionic concentration in the water and proceed to a new comparison.
- Said "loop" can go on theoretically till the concentration value of the repeated rinses equals the initial value of ionic concentration. At any rate, it is also possible to set the execution of a max number of rinses which surely allows to reach to reach the limits dictated by the ECO-Label Guideline.
- the user may have selected an intermediate rinsing level, since he prefers to save water.
- the machine control system will compare the ionic concentration degree of the water at the end of the second rinse with the data set by the user through the knob M.
- the value set by the user always represents a relative value, since the quality degree of the rinsing process is obviously depending on the ionic concentration characteristics of clean water from the mains, i.e. the value set by the user is interpreted by the control system based on the quality of the water available.
- the control system At any rate, if following a measurement of the water ionic concentration at the end of the second rinse the control system realized that the required result has not yet been reached, then the control system itself will enable water discharge and execution of the normal spinning step following each rinse with its related discharge, then start a third rinse step with clean water. At the end of such a third rinse the control system will measure again the ionic concentration degree of the water and make a subsequent data comparison repeating the "loop" as described above till the ionic concentration value detected is compatible (eg. either equal or very close and/or lower) with the one set through the knob M.
- the machine control system executes a relative measurement of the ionic concentration degree of the rinsing water, since the basic value for the comparison with the value set by the user will always be the one of the ionic concentration of the water from the mains, i.e. water first input into the machine.
- the characteristics of said initial water may change from place to place and from season to season; anyway, the machine according to the suggested embodiment is perfectly capable of adapting its operation to said variability of environmental conditions.
- the first water taken into the machine will contain some detergent so that the device measuring both the resistivity and ionic concentration is not in a position to indicate a significant data.
- the required comparisons will be made by the control system based on an historical value related to the ionic concentration of the water from the mains, which is updated every time a cycle with pre-wash with detergent is not carried out.
- control unit is advantageously equipped with a nonvolatile EEPROM type memory (Electrically Erasable Programmable Memory) capable of storing the values related to the ionic concentration degree of the water from the mains. Said indications can be picked up in the time, washing after washing, by the measuring device and stored in said nonvolatile memory, which is updated from time to time according to adequate criteria obtained from the modern learning software technology (learning algorythms).
- learning algorythms modern learning software technology
- Fig. 5 shows schematically the block diagram of a part of the logic control circuit of the laundry washing-machine according to the above embodiment of the present invention.
- Block 100 is the logic flow start-block and corresponds to the start of a previously selected wash cycle; then control goes to block 101 to check the selected type of wash cycle and from block 101 to block 102 to check the required rinse type, i.e. the selection actuated by the user through the knob M.
- Control goes to block 103, wash-cycle start, which starts water supply into the machine. Then control goes to block 104 to calculate the ionic concentration of the water during water supply and then to block 105, a test block, to check whether the value that has been calculated indicates the presence of detergent residues in the water (indicative of pre-wash).
- control goes to block 106 through which the control unit provides to read the mentioned historical value and stores it in a proper memory address, then the control goes to block 108.
- control goes to block 107 to store the ionic concentration value detected in the water from the mains in said memory address and update the historical value. Then the control goes to block 108.
- Block 108 verifies the various washing steps, including a first rinse, then the control goes to block 109 to execute a second rinse.
- control goes further to block 110 to calculate the ionic concentration degree of the water at the end of the second rinse.
- the control goes to block 111, a test block, to check compatibility between the desired ionic concentration and the value actually detected (for instance the actual ionic concentration can be set to be always equal or lower).
- control goes to block 112 to terminate the wash cycle; in the negative (NO), control goes back to block 109 to execute a new rinse and a new measurement of the ionic concentration.
- the cycle or "loop" 109-111 is then repeated till the rinse water from block 109 will reach the ionic concentration level required.
- the machine control system can favourably provide an adequate control routine to be realized automatically during machine installation should the first cycle be carried out with pre-wash, as in this instance, in fact, the control system cannot use the actual ionic concentration value of the water from the mains nor the historical data. Therefore, using this sequence the control system will control for said first wash-cycle of the machine life a higher pre-defined number of rinses than normally foreseen in average for a laundry washer (eg. twice the usual number), to achieve a presumably reliable value of the water characteristics from the mains at the end of the last rinse in the case of such a sequence.
- Another embodiment may be a measuring device of the type already described above located directly on the water input pipe from the mains, i.e. upstream of the detergent dispenser.
- the control system will obtain the actual ionic concentration value of the water from the mains even when carrying out a pre-wash with detergent.
- This solution also appears very economical thanks to the low-cost components of the resistivity sensor.
- a further possible embodiment to comply with the requirements of household appliance manufacturers provides some setting means instead of the knob M but not actuatable by the user, such as for instance a potentiometer inside the machine cabinet. Therefore, according to said embodiment, washing-machine manufacturers would be able to design machine configuration for the different markets using said setting means.
- the countries with particular water consumption regulations could have the machines set to obtain best rinsing quality as a function of the max quantity of consumable water, leaving all other aspects and advantages of the present invention described above unchanged, whereas the countries where such regulations are not in force, i.e. where water cost rates are low, the machine could be steadily preset for best rinsing results.
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Claims (15)
- Haushaltswaschmaschine, insbesondere Wäschewaschmaschine, enthaltend eine Steuereinheit (MP) und Mittel (A, B) zum Erfassen der Detergenz- oder lonenkonzentration des Wassers, wobei die Steuereinheit (MP) das Ausführen eines Spülvorganges steuert, der andauert, bis eine vorbestimmte Spülleistung (MR, MC) erreicht worden ist, die als Funktion von Meßwerten der Detergenz- oder lonenkonzentration des Wassers erfaßt wird, was durch die Erfassungsmittel (A, B) ausgeführt wird,
dadurch gekennzeichnet, daß eine Auswahleinrichtung (M) für die Qualität der Spülleistung vorgesehen ist, wobei die Auswahleinrichtung (M) die Auswahl der zu erzielenden Spülleistung (MR, MC) unter mehreren unterschiedlichen Spülleistungen ermöglicht und wobei die Steuereinheit (MP) zum Steuern des Spülvorganges (MR, MC) als Funktion der durch die Auswahleinrichtung (M) erfolgten Auswahl und als Funktion der Detergenz- oder lonenkonzentrationsmessungen des Wassers, die durch die Erfassungsmittel (A, B) ausgeführt werden, in der Lage ist. - Haushaltswaschmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Auswahleinrichtung (M) mit zwei Grenzen (MC, MR) versehen ist, zwischen denen die zu erzielende Spülleistung ausgewählt wird, wobei die Grenzen jeweils stehen für:einen minimalen Wasserverbrauch für den zu erzielenden Spülvorgang undeine minimale Detergenz- oder lonenkonzentration, die das Wasser am Ende des zu erzielenden Spülvorganges haben sollte. - Haushaltswaschmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Steuereinheit (MP) eine elektronische Steuereinheit ist und daß nicht flüchtige Speichermittel (ROM, EEPROM) mit der elektronischen Steuereinheit (MP) zusammenwirken. - Haushaltswaschmaschine nach Anspruch 3,
dadurch gekennzeichnet, daß die nicht flüchtigen Speichermittel (ROM, EEPROM) kodierte Daten enthalten, die für jede Position der Auswahleinrichtung (M) einen entsprechenden Wert oder einen entsprechenden Bereich an Werten für die Detergenz- oder lonenkonzentration beinhalten, welche das Wasser am Ende des Spülvorganges aufweisen sollte, damit dieser als ordnungsgemäß beendet angesehen werden kann. - Waschmaschine nach Anspruch 4,
dadurch gekennzeichnet, daß die nicht flüchtigen Speichermittel (ROM, EEPROM) Kriterien enthalten, die durch die Steuereinheit (MP) zum Steuern des Spülvorganges verwendet werden als Funktion von:den Detergenz- oder lonenkonzentrationswerten, die in dem Wasser erfaßt werden, unddem Detergenz- oder lonenkonzentrationswert des Wassers entsprechend der Spülleistung, die durch die Auswahleinrichtung (M) ausgewählt worden ist. - Haushaltswaschmaschine nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß die Mittel (A, B) zum Erfassen der Detergenz- oder lonenkonzentration des Wassers eine Einrichtung zum Messen des Widerstandswertes des Wassers enthalten, aus dem die Steuereinheit (MP) die Detergenz- oder lonenkonzentration des Wassers berechnen kann. - Haushaltswaschmaschine nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß die Meßeinrichtung vorgesehen ist, um die Detergenz- oder lonenkonzentration sowohl von klarem Wasser aus der Wasserleitung als auch des Wassers, welches während verschiedener Schritte eines Waschzyklus verwendet worden ist, zu erfassen. - Waschmaschine nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß die nicht flüchtigen Speichermittel (ROM, EEPROM) einen Speicher des Lese-/Schreibtyps enthalten, welcher zum Speichern und Aktualisieren der Information bezüglich der lonenkonzentration des Wassers aus der Wasserleitung verwendet wird. - Haushaltswaschmaschine nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß die nicht flüchtigen Speichermittel (ROM) ein Betriebsprogramm enthalten, welches automatisch beim ersten Waschzyklus während der Lebensdauer der Maschine ausgeführt wird, sollte dieser einen Vorwaschschritt mit der Verwendung eines Waschmittels enthalten. - Verfahren zum Steuern des Spülvorgangs in einer Haushaltswaschmaschine, insbesondere einer Wäschewaschmaschine, die Mittel zum Durchführen des Waschens und des Spülens, eine Steuereinheit (MP) und Mittel (AB) zum Erfassen der Detergenz- oder lonenkonzentration des Wassers enthält, wobei die Steuereinheit (MP) das Ausführen eines Spülvorgangs steuert, welcher andauert, bis eine vorbestimmte Spülleistung (MR, MC) erreicht worden ist, die als Funktion der Werte der Detergenz- oder lonenkonzentration des Wassers erfaßt wird, was durch die Erfassungsmittel (A, B) ausgeführt wird,
gekennzeichnet durchBereitstellen einer Auswahleinrichtung (M) für die Qualität des auszuführenden Spülvorganges durch die Maschine,Einspeisen von Daten in die Steuereinheit (MP) mittels der Auswahleinrichtung (M), wobei die Daten für die Menge der Detergenzreste stehen, die in dem Wasser am Ende eines Spülvorganges noch vorhanden sein können, damit er als abgeschlossen angesehen werden kann,Steuern des Spülvorganges durch die Steuereinheit (MP) als Funktion der Information, die durch die Auswahleinrichtung (M) bereitgestellt wird, und als Funktion der Information, welche sich aus den Messungen, die durch die Erfassungsmittel (A, B) ausgeführt werden, ergibt. - Verfahren nach Anspruch 10,
dadurch gekennzeichnet, daß die Spülleistung aus einem Bereich unterschiedlicher möglicher Leistungen ausgewählt werden kann, welche zwischen zwei Grenzen vorhanden sind, wobei:bei der ersten Grenze der Spülvorgang mit einem minimalen Wasserverbrauch ausgeführt wird,bei der zweiten Grenze der Spülvorgang bei Erreichen einer minimalen Detergenz- oder lonenkonzentration im Wasser am Ende des Spülvorganges beendet wird. - Verfahren nach Anspruch 10 oder 11,
dadurch gekennzeichnet, daß unabhängig von der ausgewählten Spülleistung der voreingestellte Minimalpegel der Detergenz- oder lonenkonzentration, die das Wasser während des letzten Spülvorganges, der durch die Maschine ausgeführt wird, haben sollte, und/oder die voreingestellte Maximalmenge des für den von der Maschine ausgeführten Spülvorgang verwendeten Wassers Vorrang hat. - Verfahren nach Anspruch 11,
dadurch gekennzeichnet, daß das Verfahren weiterhin vorsieht:Einstellen einer vorbestimmten Spülleistung, wobei jede auswählbare Leistung einer voreingestellten lonenkonzentration entspricht, die das Wasser am Ende eines Spülvorganges aufweisen sollte,Messen der lonenkonzentration des für einen Spülschritt verwendeten Wassers am Ende zumindest dieses Spülschrittes,Vergleichen der lonenkonzentration des Wassers am Ende des Spülschrittes mit der Konzentration bezogen auf die ausgewählte Spülleistung, wobei im Falle der Kompatibilität zwischen den beiden Konzentrationen der Spülvorgang beendet wird, und wobei im Falle der Nichtkompatibilität zwischen den beiden Konzentrationen der Spülvorgang fortgesetzt wird. - Verfahren nach einem der vorstehenden Ansprüche;
dadurch gekennzeichnet, daß es außerdem das Messen der lonenkonzentration des Wassers während des letzten Waschschrittes, der durch einen Betriebszyklus der Maschine vorgesehen ist, und ihres Verhältnisses zur lonenkonzentration des Wassers am Ende jedes ausgeführten Spülvorganges enthält. - Verfahren nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß es das Messen der lonenkonzentration des Wassers aus der Wasserleitung und den Vergleich mit der lonenkonzentration des Wassers von mindestens einem Spülschritt vorsieht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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IT95TO000511A IT1276421B1 (it) | 1995-06-16 | 1995-06-16 | Macchina di lavaggio, con mezzi di impostazione della prestazione di risciacquo, e relativo metodo di controllo |
ITTO950511 | 1995-06-16 |
Publications (3)
Publication Number | Publication Date |
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EP0748892A1 EP0748892A1 (de) | 1996-12-18 |
EP0748892B1 true EP0748892B1 (de) | 2001-04-04 |
EP0748892B2 EP0748892B2 (de) | 2005-12-14 |
Family
ID=11413658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96201658A Expired - Lifetime EP0748892B2 (de) | 1995-06-16 | 1996-06-14 | Waschmaschine mit Vorrichtung und Verfahren zur Steuerung der Spülung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0748892B2 (de) |
DE (1) | DE69612325T3 (de) |
ES (1) | ES2156254T5 (de) |
IT (1) | IT1276421B1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6958693B2 (en) | 2002-05-24 | 2005-10-25 | Procter & Gamble Company | Sensor device and methods for using same |
WO2008047216A2 (en) | 2006-10-17 | 2008-04-24 | Indesit Company S.P.A. | A washing machine, particularly a laundry washing machine, with simplified user interface |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101052783B1 (ko) * | 2007-04-06 | 2011-07-29 | 삼성전자주식회사 | 세탁기의 제어방법 |
US9743820B2 (en) | 2010-02-26 | 2017-08-29 | Whirlpool Corporation | User interface for dishwashing cycle optimization |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2854148A1 (de) * | 1977-12-20 | 1979-06-21 | Asko Upo Oy | Verfahren und vorrichtung zur steuerung der spuelung in einer waschmaschine |
EP0017516A1 (de) * | 1979-03-02 | 1980-10-15 | USINES ET FONDERIES ARTHUR MARTIN (Société Anonyme) | Elektronische Programmiervorrichtung für ein elektrisches Haushaltsgerät und deren Anwendungen |
EP0030602B1 (de) * | 1979-12-18 | 1984-09-12 | Bosch-Siemens HausgerÀ¤te GmbH | Verfahren und Vorrichtung zum Spülen von in einer programmgesteuerten Waschmaschine gewaschener Wäsche |
DE3715956A1 (de) * | 1987-05-13 | 1988-12-01 | Bosch Siemens Hausgeraete | Verfahren zum ueberwachen des programmablaufes von geschirrspuel- oder waschmaschinen |
DE2832216C2 (de) * | 1977-07-22 | 1990-05-10 | Industrie Zanussi S.P.A., Pordenone, Udine, It |
-
1995
- 1995-06-16 IT IT95TO000511A patent/IT1276421B1/it active IP Right Grant
-
1996
- 1996-06-14 DE DE69612325T patent/DE69612325T3/de not_active Expired - Lifetime
- 1996-06-14 EP EP96201658A patent/EP0748892B2/de not_active Expired - Lifetime
- 1996-06-14 ES ES96201658T patent/ES2156254T5/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2832216C2 (de) * | 1977-07-22 | 1990-05-10 | Industrie Zanussi S.P.A., Pordenone, Udine, It | |
DE2854148A1 (de) * | 1977-12-20 | 1979-06-21 | Asko Upo Oy | Verfahren und vorrichtung zur steuerung der spuelung in einer waschmaschine |
EP0017516A1 (de) * | 1979-03-02 | 1980-10-15 | USINES ET FONDERIES ARTHUR MARTIN (Société Anonyme) | Elektronische Programmiervorrichtung für ein elektrisches Haushaltsgerät und deren Anwendungen |
EP0030602B1 (de) * | 1979-12-18 | 1984-09-12 | Bosch-Siemens HausgerÀ¤te GmbH | Verfahren und Vorrichtung zum Spülen von in einer programmgesteuerten Waschmaschine gewaschener Wäsche |
DE3715956A1 (de) * | 1987-05-13 | 1988-12-01 | Bosch Siemens Hausgeraete | Verfahren zum ueberwachen des programmablaufes von geschirrspuel- oder waschmaschinen |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6958693B2 (en) | 2002-05-24 | 2005-10-25 | Procter & Gamble Company | Sensor device and methods for using same |
WO2008047216A2 (en) | 2006-10-17 | 2008-04-24 | Indesit Company S.P.A. | A washing machine, particularly a laundry washing machine, with simplified user interface |
Also Published As
Publication number | Publication date |
---|---|
EP0748892A1 (de) | 1996-12-18 |
ES2156254T5 (es) | 2006-06-01 |
ITTO950511A0 (it) | 1995-06-16 |
DE69612325T3 (de) | 2006-08-03 |
DE69612325D1 (de) | 2001-05-10 |
IT1276421B1 (it) | 1997-10-31 |
ITTO950511A1 (it) | 1996-12-16 |
EP0748892B2 (de) | 2005-12-14 |
DE69612325T2 (de) | 2001-07-12 |
ES2156254T3 (es) | 2001-06-16 |
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