EP2433546B1 - Lave-vaisselle doté d'une séquence de remplissage dynamique - Google Patents

Lave-vaisselle doté d'une séquence de remplissage dynamique Download PDF

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Publication number
EP2433546B1
EP2433546B1 EP11167208.5A EP11167208A EP2433546B1 EP 2433546 B1 EP2433546 B1 EP 2433546B1 EP 11167208 A EP11167208 A EP 11167208A EP 2433546 B1 EP2433546 B1 EP 2433546B1
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EP
European Patent Office
Prior art keywords
recirculation pump
speed
true
washing
running
Prior art date
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Active
Application number
EP11167208.5A
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German (de)
English (en)
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EP2433546A3 (fr
EP2433546A2 (fr
Inventor
Markus Gram
Peter Schweier
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2433546A2 publication Critical patent/EP2433546A2/fr
Publication of EP2433546A3 publication Critical patent/EP2433546A3/fr
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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
    • 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
    • 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
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve

Definitions

  • the present invention relates to a dishwasher, in particular a domestic dishwasher, with a control device for carrying out a wash cycle for cleaning wash ware, with a wash chamber for receiving the wash ware during the wash cycle, with an inlet valve which can be opened and closed by the control device for filling washing liquid into the rinsing chamber, with a circulating pump for circulating the rinsing liquid located in the rinsing chamber, the speed of which can be varied by the control device, and with a concentricity monitoring unit for carrying out a concentricity test on the circulating pump.
  • a method for speed control of a circulating pump for a program-controlled dishwasher is known, the pump motor speed following a supply voltage pattern and being essentially determined by a start-up phase with a low creep speed, a start-up phase with increasing speed and a nominal speed range with approximately constant speed.
  • the dishwasher is programmed on selectable speed control curves for a specific pump type and the speed of the circulation pump is controlled according to the stored control curve.
  • a method for carrying out a water inlet in the washing container of a dishwasher with a circulation pump, the speed of which is adjustable, is known, the method of filling a quantity of groundwater and then increasing the circulation pump speed from a start speed to a target speed.
  • the circulation pump speed is increased from the start speed to a refueling speed at which an unstable pump run occurs, and then the rinsing tank Dabieine by the after the inflow of the groundwater Refueling speed or the difference between the target speed and the refueling speed dependent amount of water supplied.
  • the object of the present invention is to provide a dishwasher, in particular a domestic dishwasher, in which the filling of washing liquid into the washing chamber is improved.
  • the rinse cycle comprises at least one filling sequence in which the feed valve is opened and the circulation pump is switched on during a filling phase, an algorithm for varying the speed of the circulation pump being provided for the filling phase, wherein the algorithm comprises a variation step for varying the speed in stages by a preset value, a test step for carrying out a concentricity test and a changing step for changing the preset value for performing the variation step again as a function of a result of the test step.
  • the dishwasher according to the invention has a control device for automatically carrying out operational sequences of the dishwasher.
  • the control device can be designed as a so-called sequence control, in particular as an electronic sequence control.
  • At least one washing program for carrying out or controlling a washing process also called a washing cycle, for washing dishes, in particular for washing dishes, is stored in the control device.
  • several washing programs are provided, one of which can be selected and started by the operator. This makes it possible to determine the course of a rinse cycle, in particular the loading quantity, the type of loading, the The degree of soiling of the items to be washed and / or the desired duration of the wash cycle, etc., must be adjusted.
  • the stored wash programs can preferably be designed such that the wash cycle controlled by them in particular at least one pre-wash cycle for pre-cleaning washware, at least one cleaning cycle for thorough cleaning of washware, at least one intermediate wash cycle for removing dirty washing liquid from the washware, at least one rinse cycle to avoid of stains on the wash ware and / or for preparing a drying step, and / or at least one drying cycle for drying the wash ware.
  • Pre-rinse, cleaning, intermediate rinse and rinse are referred to as water-carrying partial rinses, since the items to be washed that have been introduced into the rinsing chamber are treated with a rinsing liquid during their execution. The use of rinsing liquid is generally not intended during the drying cycle.
  • the items to be washed are treated with washing liquid in an essentially closed washing chamber, in particular a washing container, of the dishwasher.
  • An inlet valve is assigned to the rinsing chamber, which enables rinsing liquid to be filled into the rinsing chamber.
  • the inlet valve can be opened and closed by the control device in order to influence the inflow of flushing liquid.
  • a rinsing liquid is understood here to mean in particular a liquid which is intended to be applied to the items to be washed in order to clean them and / or to treat them in another way.
  • the washing liquid can also be provided for heating the items to be washed, which is common, for example, during a rinse step.
  • the rinsing liquid entering the rinsing chamber via the inlet valve is usually fresh water.
  • the washing liquid in the washing chamber can be enriched with cleaning agents, with cleaning aids such as rinse aid and / or with dirt that has been detached from the items to be washed.
  • cleaning aids such as rinse aid and / or with dirt that has been detached from the items to be washed.
  • already enriched water is poured into the rinsing chamber as rinsing liquid via the inlet valve.
  • a circulation pump for circulating the filled washing liquid is assigned to the washing chamber, which makes it possible to use the washing liquid in the washing chamber e.g. to be removed from a collecting device for washing liquid and applied to the items to be washed via a spray system assigned to the washing chamber.
  • the speed of the circulation pump can be variably controlled and / or regulated by the control device of the dishwasher.
  • the dishwasher also includes a concentricity monitoring unit for carrying out a concentricity test on the circulation pump.
  • the concentricity monitoring unit can in particular be part of the control device or can be connected to the control device of the dishwasher for data exchange.
  • a circulation pump is generally in true rotation when there is sufficient rinsing liquid in the collecting device of the rinsing chamber to prevent air from being sucked in by the circulation pump. Whether air is drawn in or not depends on the speed of the circulation pump. The reason for this is that as the speed of the circulation pump increases, an ever smaller part of the total washing liquid present in the washing chamber is in the collecting device, since it takes a certain time until the washing liquid sprayed onto the items to be washed gets back into the collecting device. The speed at which concentricity is just still possible is also referred to as the maximum concentricity speed.
  • the dishwasher according to the invention is designed such that at least one filling sequence for filling the washing chamber with washing liquid is carried out during the execution of a washing cycle, which comprises a filling phase during which the inlet valve is opened and the circulation pump is switched on. In this way it is ensured that washware is already supplied with washing liquid while the washing chamber is being filled, so that the cleaning action starts early, whereby the duration of the washing cycle can be shortened compared to those washing cycles in which the washing chamber has the same cleaning result is filled with the circulation pump stopped.
  • Such a filling sequence can be provided, for example, at the beginning of one of the water-carrying partial rinse cycles of the wash cycle, in each case at the start of several of the water-bearing partial rinse cycles of the wash cycle or at the beginning of all of the water-carrying partial rinse cycles of the wash cycle.
  • an algorithm for the filling phase i.e. a sequence procedure or sequence of sequence steps for varying the speed of the circulation pump is provided, which allows the speed of the circulation pump to be adapted to the amount of flushing liquid increasing in the course of the filling phase in such a way that, on the one hand, the circulation pump is always operated at a relatively high speed, and that, on the other hand, the circulation pump is operated at least for a substantial part of the duration of the filling phase.
  • the cleaning effect is increased during the filling phase by an optimized application of washing liquid to the wash ware and, at the same time, the noise level of the dishwasher is reduced, since annoying slurping noises when air is sucked in by the circulation pump can be largely avoided.
  • the algorithm or the sequence of steps can be controlled by the control device of the dishwasher.
  • the algorithm for varying the speed comprises a varying step for varying the speed in steps by a predetermined value.
  • the variation step serves to actually adjust the speed of the circulation pump.
  • the default value can be a summand, so that the speed provided after the variation step results from the sum of the speed provided before the variation step and the default value.
  • the variation step can be carried out, for example, by the control device of the dishwasher.
  • the algorithm further comprises at least one test step for carrying out a concentricity test.
  • the respective test step can be used to determine whether or not the circulation pump is concentric at the speed resulting in the variation step carried out previously.
  • the respective test step can in particular be carried out by the concentricity monitoring unit.
  • the result of the test step can be transmitted from the concentricity monitoring unit to the control device, which can then carry out the change step.
  • This sequence of steps which comprises a variation step, a test step and a change step, can be repeated until a sufficient amount of rinsing liquid is filled into the rinsing chamber. In this way, it is possible to operate the circulation pump at a high speed during the entire filling phase, without the risk that the circulation pump will be operated permanently outside the concentricity.
  • the algorithm comprises an abort step for ending the filling sequence when an end value intended for the speed has been reached and when the circulation pump is preferably in rotation.
  • the final value can correspond to the speed at which the circulation pump is operated according to the filling sequence. In this way it can be ensured that at the end of the filling sequence there is an optimized amount of washing liquid in the washing chamber. In this way, a malfunction of the dishwasher due to an insufficient amount of washing liquid and, on the other hand, an unnecessarily high consumption of washing liquid can be avoided.
  • the algorithm automatically compensates for deviations in the filling flow, i.e. the amount of rinsing liquid supplied per unit of time, from a nominal filling flow.
  • the filling phase is always continued until there is an optimized amount of rinsing liquid in the rinsing chamber. It is not necessary to measure the filling flow or the quantity of flushing liquid, for example with an impeller counter.
  • a simple, switchable inlet valve can be used, which can only assume an open position and a closed position, since it is not necessary to control or regulate the filling flow of the washing liquid when filling the washing chamber.
  • the control device can also be simple, since it is only intended for issuing two control commands to the inlet valve, namely "open valve” and close valve ".
  • the algorithm excludes that the rinsing liquid fill level is too low, which is due to the fact that a significant part of the rinsing liquid filled collects in an incorrectly inserted hollow container, for example in a pot with an opening pointing upwards. It is not necessary to measure the fill level with a separate fill level sensor.
  • the dishwasher according to the invention can consequently be constructed in a particularly simple manner.
  • the algorithm does not require the inlet valve to be temporarily closed during the inlet sequence. In this way, the filling sequence can be completed much faster than in the case of filling processes which generally provide for multi-stage filling.
  • the default value is greater than or equal to zero if the result of the test step is that the circulating pump is in rotation. In this way it can be prevented that the speed is reduced unnecessarily.
  • the increase in the default value does not occur when a maximum value provided for the default value has been reached. This avoids an arbitrarily large increase in the default value, which could lead to the speed at which concentricity is still possible being exceeded excessively when the algorithm is continued, which could then lead to a rocking of the algorithm.
  • a rocking of the algorithm is understood to mean in particular a process in which major fluctuations in the speed occur around the optimal value.
  • the default value is less than or equal to zero if the result of the test step is that the circulating pump is not in true rotation.
  • this can cause the speed to be reduced and rotation of the circulation pump to be achieved after one or more variation steps.
  • the default value is reduced. In this way, the concentricity can be achieved faster.
  • the lowering of the default value does not occur when a minimum value provided for the default value has been reached. In this way, an excessive lowering of the default value can be avoided, which could lead to the speed at which concentricity is just still possible being undershot when the algorithm is continued, which could then lead to a rocking of the algorithm.
  • the default value is set to zero.
  • a careful approximation is made to the speed at which concentricity is just still possible with the amount of washing liquid present. In particular, this can avoid an exaggerated change in the default value and, consequently, the speed, which could lead to an agitation of the algorithm.
  • the inlet valve is opened and the circulating pump is switched off during a pre-filling phase carried out before the filling phase, the duration of the pre-filling phase being dependent on a preset time value.
  • the duration of the pre-filling phase being dependent on a preset time value.
  • such a starting value is provided that, with a filling flow of rinsing liquid that is within a normal range, the circulation pump is in true rotation in the first test step.
  • a normal range for the filling flow is usually defined in a dishwasher.
  • an upper limit can be provided for the normal range, which exceeds the nominal filling current by a certain percentage value, for example 10%.
  • a lower limit can be provided for the standard range, which falls below the nominal filling current by a certain percentage value, for example 10%.
  • the start value for the speed is now set in such a way that with a filling flow in a normal range, the circulating pump is in the first test step in true rotation, it is ensured in practically relevant cases that the speed approaches the optimum value from below. In this way, slurping noises can be avoided at least in the initial phase.
  • the default value corresponds to its intended maximum value. In this way, the approximation to the optimal value can be accelerated, which is particularly advantageous in the case of a relatively large filling flow.
  • the feed valve is opened and the circulation pump is switched on during a refilling phase carried out after the filling phase, the duration of the refilling phase being dependent on a preset time value.
  • a defined excess of rinsing liquid can be poured into the rinsing chamber in order to ensure that the circulation pump runs smoothly even under unfavorable conditions, for example in the case of a hollow vessel that rotates or tilts after the filling sequence and fills up with rinsing liquid and thus removes rinsing liquid from the circulation circuit.
  • the circulation pump comprises an electric motor, the concentricity monitoring unit being designed to monitor fluctuations in at least one electrical operating parameter of the electric motor. If the amount of rinsing liquid in the rinsing chamber is too small, the circulation pump, as already described, sucks in not only rinsing liquid but also air. The ratio of sucked-in air and sucked-in flushing fluid fluctuates around a statistical mean. These fluctuations in turn lead to fluctuations in the electrical operating parameter of the circulating pump, so that the evaluation of the fluctuations without recording the absolute value of the operating parameter allows a statement to be made as to whether the circulating pump is in rotation or not. This can improve the quality of the concentricity test.
  • the concentricity monitoring unit can be designed to detect the electrical power of the circulation pump.
  • the concentricity monitoring unit can be designed for this purpose to record the electrical current consumption.
  • the concentricity monitoring unit can then determine whether the circulation pump is in concentricity or not by analyzing the recorded power. In this case, the actual Power from a planned power and / or in the event of strong fluctuations in the power over time, it can be concluded that the circulating pump is not in true rotation.
  • the circulation pump can have a brushless electric motor, preferably a brushless DC motor.
  • the brushless electric motor can be designed in particular as a permanent magnet motor.
  • a brushless permanent magnet motor can be designed as a brushless DC motor, also called a BLDC motor, as a brushless AC motor, also called a BLAC motor, or as a synchronous motor.
  • the rotor of the motor comprises at least one permanent magnet, whereas the stator has several electromagnets.
  • the electromagnets are commutated via control electronics.
  • both the direction of rotation and the speed of the motor can be controlled in a simple manner. By operating the motor in exactly one direction of rotation, it is possible to optimize the flow of the water-carrying parts of the circulation pump. This results in a high delivery rate with low energy consumption. In addition, the delivery rate of the circulation pump can be controlled as required, which further increases energy efficiency.
  • the brushless permanent magnet motor can be designed as a wet runner, so that complex sealing measures are not required.
  • the invention also relates to a method for operating a dishwasher, in particular according to one of the preceding claims, with a control device for carrying out a wash cycle for cleaning items to be washed, with a wash chamber for receiving the wash items during the wash cycle, with an opening by the control device. and closable inlet valve for filling flushing liquid into the flushing chamber, with a circulation pump for circulating the flushing liquid in the flushing chamber, the speed of which can be varied by the control device, and with a concentricity monitoring unit for carrying out a concentricity test on the circulating pump.
  • At least one filling sequence is carried out during the rinsing cycle, in which the inlet valve is opened and the circulation pump is switched on during a filling phase, an algorithm for varying the speed of the circulation pump being carried out during the filling sequence, a variation step being carried out when the algorithm is carried out for the step-like variation of the speed by a default value, a test step for carrying out a concentricity test and a change step for changing the default value for a new execution of the variation step depending on a result of the test step.
  • the method according to the invention enables a washing cycle to be carried out simply, quickly and reliably and is characterized by low demands on the structural design of the dishwasher.
  • FIG. 1 shows an advantageous embodiment of a household dishwasher 1 according to the invention in a schematic side view.
  • the dishwasher 1 has a control device 2, in which at least one washing program for controlling a washing cycle for washing dishes, in particular dishes, is stored.
  • a number of wash programs are expediently stored, so that by selecting a suitable wash program, the course of a wash cycle controlled by the control device 2 can be adapted, for example, to the load quantity, to the type of load, to the degree of contamination of the washware and / or to the desired duration of the wash cycle.
  • the control device 2 is assigned an operating device 3, which allows an operator of the dishwasher 1 to call up one of the washing programs and thereby start it. Furthermore, the control device 2 is assigned an output device 4 which enables messages to be output to the operator.
  • the output device 4 can comprise display lamps, light-emitting diodes, an alpha-numerical display and / or a graphic display for outputting optical or visual messages. In addition or independently of this, the output device 4 can have a buzzer, a loudspeaker and / or the like for outputting acoustic messages.
  • the dishwasher 1 further comprises a washing container 5, which can be closed by a door 6, so that a closed washing chamber 7 is created for washing dishes.
  • the washing container 5 can optionally be arranged in the interior of a housing 8 of the dishwasher 1. In the case of built-in dishwashers, the housing 8 is not required and can partly be left out entirely at the top.
  • door 6 is shown in its closed position. The door 6 can be brought into an open position by pivoting about an axis arranged perpendicular to the plane of the drawing, in which it is oriented essentially horizontally and enables the introduction or removal of washware.
  • the operating device 3 is arranged on an upper section of the door 6 in a user-friendly manner.
  • the output device 4 is also arranged on the upper section of the door 6, so that visual or visual messages are clearly visible and / or acoustic messages are clearly audible.
  • the control device 2 is also positioned there, so that the required signal connections between the operating device 3, the output device 4 and the control device 2 can be kept short. In principle, however, it is possible to arrange the operating device 3, the output device 4 and / or the control device 2 elsewhere.
  • the control device can optionally also be accommodated in a base assembly below the washing compartment.
  • the control device 2 could also be decentralized, which means that it comprises spatially separated components which are connected via communication means in such a way that they can interact.
  • the dishwasher 1 has an upper crockery basket 9 and a lower crockery basket 10 for positioning dishes.
  • the upper crockery basket 9 is arranged on extension rails 11 or other extension means, which are each fastened to opposite side walls of the washing container 5, which extend in the depth direction of the washing container.
  • the crockery basket 9 can be extended from the washing container 5 by means of the extension rails 11 when the door 6 is open, which facilitates the loading and unloading of the upper crockery basket 9.
  • the lower crockery basket 10 is arranged in an analogous manner on extension rails 12.
  • the washing program (s) stored in the control device 2 can each provide a plurality of partial rinse cycles, for example in this order at least one pre-rinse cycle, at least one cleaning cycle, at least one intermediate rinse cycle, at least one rinse cycle and / or at least one drying cycle.
  • Pre-rinse, cleaning, intermediate rinse and final rinse are referred to as water-carrying partial rinses since the items to be washed positioned in the rinsing chamber 7 are treated with a rinsing liquid S during their execution. As a rule, treatment of the items to be washed with washing liquid S is not provided during the drying cycle.
  • fresh water or inlet water ZW is used as the rinsing liquid S for treating the wash ware, which can be taken up by an external water supply device WH, in particular a drinking water supply network, and filled into the rinsing chamber 7.
  • a rinsing liquid S formed from fresh feed water ZW is filled in at the beginning of each water-carrying partial rinse cycle, which is then delivered to an external waste water disposal device AR as waste water AW at the end of the respective partial rinse cycle.
  • the dishwasher 1 of the Figure 1 includes a water supply device 13 which is provided for connection to an external water supply device.
  • the external water supply device includes a water tap WH of a building-side water installation, which provides pressurized inlet water ZW.
  • the water inlet device 13 comprises a connection piece 14 which is provided for connection to the water tap WH.
  • the connection can be made, for example, via a thread arrangement, a bayonet arrangement or the like.
  • a connecting hose 15 is provided downstream of the connecting piece 14 and is preferably designed to be flexible. The downstream end of the connecting hose 15 is connected to a connector 16 fixed to the housing.
  • a supply line 17 Downstream of the connection piece 16 fixed to the housing, a supply line 17 is provided, which is connected to an input side of an inlet valve 18 which can be switched by means of the control device 2.
  • An outlet side of the inlet valve 18 is in turn connected to a liquid inlet 19 of the rinsing chamber 7.
  • the inlet valve 18 can be designed as a switchable solenoid valve, which has only an open position and a closed position.
  • a water treatment system not shown, for example a softening system, can be provided in the supply line 17.
  • an external inlet valve in particular a so-called aqua stop valve, can also be provided between the connection piece 14 and the water tap WH, which is preferably switchable, in particular lockable and openable, by means of the control device
  • the inflow amount of rinsing liquid S into the rinsing chamber 7 per unit of time results in particular primarily u. a. from the construction of the inlet valve 18 and from the pressure of the flushing liquid S on the inlet side of the inlet valve 18.
  • the actual filling flow can be above or below the nominal filling flow due to series discrepancies in the manufacture of the inlet valve 18 or due to other circumstances.
  • a normal range for the filling flow is usually defined, in which a functioning of the dishwasher is guaranteed.
  • an upper limit can be provided for the normal range, which exceeds the nominal filling current by a certain percentage value, for example 10%.
  • a lower limit can be provided for the standard range, which falls below the nominal filling current by a certain percentage value, for example 10%.
  • the washing liquid S which has entered the washing chamber 7 via the liquid inlet 19 reaches a collecting device 21 which is formed on a bottom 20 of the washing container 5 and which can preferably be designed as a collecting pot 21.
  • An input side of a circulation pump 22 is connected to the collection pot 21 in a liquid-conducting manner.
  • an outlet side of the circulation pump 22 is connected to a spray device 23, 24, which makes it possible to apply washing liquid S to the washware introduced into the washing chamber 7.
  • the spray device 23, 24 comprises an upper rotatable spray arm 23 and a lower rotatable spray arm 24.
  • fixed spray elements could also be provided.
  • the washing liquid S emerging from the spraying device 23, 24 when the circulation pump 22 is switched on returns due to its weight within the washing chamber 7 back into the collecting pot 21. While the washing liquid S is being circulated in the washing chamber 7, the aim is for the circulation pump 22 to run smoothly operate.
  • the circulation pump 22 is then in the round rotation when there is such a large amount of rinsing liquid S that it only conveys rinsing liquid S or, in other words, no air.
  • a rotation monitoring unit 25 is assigned to it. This can be provided as a separate component or possibly also be part of the control device 2.
  • the dishwasher 1 has, in a conventional manner, a metering device 26 which makes it possible to add cleaning agents and / or cleaning aids to the washing liquid S introduced into the washing chamber 7 in order to improve the cleaning action and / or the drying action of a wash cycle.
  • the in Figure 1 Dishwasher 1 shown has a drain device 27 which serves to pump out washing liquid S which is no longer required as waste water AW from the washing chamber 7 to the outside.
  • the drainage device 27 comprises a drain pump 28, the input side of which is connected to the collecting pot 21.
  • the output side of the drain pump 28, on the other hand, is connected to a connecting line 29, the downstream end of which is connected to a connection 30 of the dishwasher 1 fixed to the housing.
  • a waste water hose 31 is fastened to an outlet of the connection 30 fixed to the housing, which in the exemplary embodiment of FIG Figure 1 is particularly flexible.
  • a connection piece 32 which is provided to connect the drain device 27 to a waste water disposal device AR.
  • the waste water disposal device AR can be a waste water pipe of a water installation in the building.
  • the connection between the connection piece 32 and the sewage pipe can be designed as a screw connection, as a bayonet connection, as a plug connection or the like.
  • FIG Figure 2 shows a block diagram of the household dishwasher 1 of FIG Figure 1 , in particular the control and communication concept is shown.
  • An exemplary embodiment provides a signal line 33 which connects the operating device 3 to the control device 2 in such a way that operating commands from an operator can be transmitted from the operating device 3 to the control device 2.
  • a signal line 34 is provided, which connects the control device 2 to the output device 4, so that information provided by the control device 2 can be transmitted to the output device 4 and output there to the operator.
  • a control line 35 is provided, which connects the control device 2 to the switchable inlet valve 18 in such a way that the inlet valve 18 can be closed or opened by the control device 2. In this way, the filling of washing liquid S into the washing chamber 7 can be controlled by the control device 2.
  • Another control line 36 connects the control device 2 to the circulation pump 22. As a result, the circulation pump 22, in particular its speed, can also be adjusted, in particular controlled or regulated, by the control device 2.
  • a signal line 37 is provided, which connects the concentricity monitoring unit 25 to the control device 2.
  • the signal line 37 makes it possible to transmit information generated by the concentricity monitoring unit 25 with respect to the running properties of the circulation pump 22 to the control device 2.
  • the control device 2 is designed such that it can take this information from the concentricity monitoring unit 25 into account when switching, in particular when controlling the closing and / or opening times, possibly also the control or regulation, of the inlet valve 18.
  • a control line 38 is provided, which connects the control device 2 to the drain pump 28, so that the drain pump 28 can also be switched, in particular switched on and off, by the control device 2.
  • FIG 3 shows a flow diagram of a filling sequence F in the inventive household dishwasher 1 of the exemplary embodiment.
  • the filling sequence F preferably represents an independent aspect of the invention. It can be carried out or controlled by the control device 2 and can be carried out one or more times while a washing cycle is being carried out.
  • the inlet valve 18 is opened in a step ZO. With the opening of the inlet valve 18, a pre-filling phase VFP begins, the duration of which depends on a preset time value, which can be contained, for example, in a washing program called up by the operator.
  • the preset time value can be set so that during the pre-filling phase VFP under normal conditions such an amount of washing liquid S reaches the washing chamber 7 that is sufficient for a rotation of the circulating pump 22 running at a speed, for example 40% to 60% of its final speed is.
  • the circulation pump 22 is then switched on in a step UPE and operated with a starting value for its speed.
  • a filling phase FP is initiated, in which an algorithm or sequence of sequence steps for varying the speed of the circulation pump 22 is executed.
  • This algorithm comprises a variation step VAS for the step-like variation of the rotational speed by a preset value, a test step PS for carrying out a concentricity check, an abort step AS for canceling the filling phase FP and a change step VES for changing the preset value for a new execution of the variation step VAS depending on a result of the test step PS.
  • the variation step VAS is carried out first, in which the speed of the circulation pump is changed by a start value of a preset value.
  • the variation step VAS is followed by the test step PS, in which it is checked by means of the concentricity monitoring unit 25 whether the circulation pump 22 is in concentricity or not.
  • the termination step AS is carried out, in which predetermined termination conditions are checked for their occurrence. Otherwise, the change step VES is carried out, in which the default value is adapted to carry out the variation step VAS again. It can be checked as a termination condition whether the speed of the circulation pump 22 has reached an end value. If this is the case, it can be concluded that such an amount of washing liquid S is filled into the washing chamber 7 that, in principle, the circulation pump continues to operate when the washing cycle is continued in the round run is possible. On the other hand, if the termination conditions do not apply, the change step VES is carried out, in which the default value is adjusted so that the variation step VAS can be carried out again.
  • the default value is adjusted depending on the previous test step PS. If a concentricity of the circulation pump 22 has been determined, the default value is typically increased, the slope of a curve representing the speed also increasing in the next variation step VAS, so that the speed from below approaches the value at which the current quantity is Rinsing liquid S is just still possible. In this case, a maximum value can be provided for the predefined value, when it is reached there is no intended increase.
  • the default value is typically reduced, the slope of the curve representing the speed also decreasing in the next variation step VAS, so that the speed from above approaches the value at which With the current amount of washing liquid S, a runout is just still possible.
  • a minimum value can be provided for the default value, when it is reached a reduction which is provided per se does not occur.
  • a time-controlled refilling phase NFP follows, the duration of which depends on a further preset time value, which can be contained, for example, in the washing program called up by the operator.
  • the preset time value can be set in such a way that during the refill phase NFP, under normal conditions, a quantity of rinsing liquid S reaches the rinsing chamber 7 as a reserve, which is, for example, 10% to 20% of the quantity of the prefill phase VFP.
  • the provision of rinsing liquid reserves using the NFP refill phase is not absolutely necessary, but is useful in many cases.
  • the inlet valve 18 is then closed in a step ZS and the end EN of the filling sequence F is reached.
  • the based on the Figure 3 Filling sequence F ensures that, at the end EN, the circulation pump 22 is operated in concentricity at its end speed can.
  • the filling sequence F furthermore allows economical use of washing liquid S. Neither a complex measurement of the amount of washing liquid S filled in or the filling level of the washing liquid S in the washing chamber 7 nor a control of the filling flow of the washing liquid S is necessary.
  • only the concentricity monitoring unit 25 and an adjustment of the control device 2 are required with regard to the design of the dishwasher 1 according to the invention.
  • the filling sequence F described ensures that the cleaning effect of a rinse cycle starts already during the filling sequence F. Slurping noises of the circulation pump 22 are minimized, since it can be operated in a concentric manner for the most part of the duration of the filling sequence F.
  • FIG 4 shows a diagram for explaining filling sequences F, F ', F "of a dishwasher 1 according to the invention, in which the rotational speed of the circulation pump 22 is plotted on the vertical axis U and the time is plotted on the transverse axis t.
  • the filling sequence F comprises a prefilling phase VFP, a filling phase FP and a refill phase NFP.
  • the fill sequence F ' comprises a prefill phase VFP', a fill phase FP 'and a refill phase NFP'.
  • the fill sequence F “comprises a prefill phase VFP", a fill phase FP "and a refill phase NFP".
  • a curve DZ shows the speed DZ of the circulation pump 22 during the filling sequence F, assuming that when the inlet valve 18 is open, a filling flow is set which corresponds to the nominal filling flow.
  • a curve RDZ shows that maximum concentric rotation speed RDZ at which in this case it is just still possible for the circulating pump 22 to rotate.
  • a curve DZ ' shows the speed DZ' of the circulating pump 22 during the filling sequence F ', it being assumed that when the inlet valve 18 is open, a filling current is set which corresponds to the minimum filling current of the normal range.
  • a curve RDZ ' shows the associated maximum concentricity speed RDZ'.
  • a curve DZ shows the speed DZ" of the circulation pump 22 during the filling sequence F ", in which, when the inlet valve 18 is open, a filling flow is set which corresponds to the maximum filling flow of the normal range.
  • a curve RDZ shows the corresponding maximum concentricity speed RDZ ".
  • the filling sequence F is explained.
  • the inlet valve 18 is opened so that the rinsing liquid S is filled into the rinsing chamber 7.
  • the maximum concentricity speed RDZ increases from zero over time.
  • the circulation pump 22 is switched on and first operated at a speed DZ which corresponds to a starting value SDZ.
  • This speed SDZ is below the maximum concentricity speed RDZ, so that within the scope of the Figure 3 explained algorithm, the speed DZ is increased with a maximum provided default value, that is with a maximum gradient, until an uneven running of the circulation pump is recognized for the first time.
  • the default value is reduced, that is, the increase in the speed DZ is reduced, until concentricity occurs again.
  • the default value is then increased until an out-of-round run is detected again.
  • the filling phase FP is then terminated when the speed DZ reaches an end value EDZ and the circulation pump 22 is in rotation. In this way it is ensured that at the end of the filling phase FP there is a quantity of washing liquid S in the washing chamber 7, which in principle makes it possible for the circulation pump 22 to be operated in a concentric manner at its final speed EDZ.
  • time-controlled refill phase NFP ensures that an additional amount of rinsing liquid S gets into the rinsing chamber, so that a runout also occurs when rinsing liquid is withdrawn from the circulation circuit, for example by rinsing liquid S collecting in an overturned hollow vessel to be cleaned.
  • the filling sequences F 'and F run in an analogous manner.
  • the maximum true running speed RDZ' has a smaller gradient and the maximum true running speed RDZ" has a greater gradient than the maximum true running speed RDZ.
  • the speed DZ ' follows the maximum true running speed RDZ' and the speed DZ "the maximum true running speed RDZ” based on the algorithm described above. In both cases it is ensured that the circulation pump 22 will operate essentially in a concentric manner. Likewise, it is ensured in both cases that at the end of the filling phases F ', F "an optimized amount of washing liquid S is poured into the washing chamber 7.
  • Figure 5 shows an enlarged section of the filling sequence F of Figure 4 , whereby the default value VW is also shown over time. It can be seen that the speed DZ is adjusted in steps over time.
  • the default value VW is set so that it corresponds to a predetermined maximum value VWM.
  • the maximum value VWM is selected such that the average gradient of the speed DZ is initially greater than the gradient of the maximum concentricity speed RDZ.
  • the speed DZ first approaches the maximum true running speed RDZ and exceeds it, which is detected in a test step PS.
  • the default value VW is set to zero so that the speed DZ remains unchanged for one run of the algorithm. Since the maximum concentricity speed RDZ continues to increase in the meantime, in the example the Figure 5 the circulation pump 22 immediately in the concentricity. The default value VW is therefore increased again.
  • a sufficient filling quantity is determined by a dynamic increase in speed with a concentricity detection.
  • a sufficient filling quantity can be recognized by the Circulation pump continuously probes to the limit of concentricity. As shown in the figures, this can be done as follows: after filling a certain minimum amount of water, the pump is started and its speed is increased continuously. The pump power or pump current is recorded. If a dispersion or a deviation of the parameters is detected in the pump output or the pump current, the runout quantity for the water quantity that has run in there is reached and the increase in the pump speed is reduced until the dispersion in the pump output or the pump current is reduced again. This should be done in such a way that the increase in pump speed adapts to the incoming water volume.
  • the sufficient filling quantity can then be determined by means of the pump speed and the filling process can be ended when a predetermined speed is reached.
  • This method enables the filling level in the domestic appliance, in particular the dishwasher, preferably the domestic dishwasher, to be recorded quickly, which reduces the error in the filling quantity.
  • the pump runs mainly in the concentric mode during filling, whereby the pump noise is reduced compared to the non-concentric mode.
  • Another advantage is the variable filling quantity when dishes are set incorrectly (e.g. bowl or pot). If the current amount of bath is missing a certain amount of water, this amount is compensated by the concentricity algorithm and enough water is replenished so that a concentricity is guaranteed.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (12)

  1. Lave-vaisselle, notamment lave-vaisselle (1) à usage domestique, comprenant un dispositif de commande (2) destiné à réaliser un cycle de lavage pour le nettoyage de produits à laver, comprenant une chambre de lavage (7) pour le logement des produits à laver pendant le cycle de lavage, comprenant une vanne d'arrivée (18) pouvant être ouverte et fermée au moyen du dispositif de commande (2) pour le remplissage de liquide de lavage (S) dans la chambre de lavage (7), comprenant une pompe de circulation (22) comportant un moteur électrique, destinée à faire circuler le liquide de lavage (S) se trouvant dans la chambre de lavage (7), dont la vitesse de rotation (DZ) est variable au moyen du dispositif de commande (2), et comprenant une unité de contrôle de concentricité (25) réalisée pour le contrôle de variations au moins d'un paramètre de fonctionnement électrique du moteur électrique, destinée à la réalisation d'un contrôle de concentricité de la pompe de circulation (22), le cycle de lavage comprenant au moins une séquence de remplissage (F) lors de laquelle la pompe de circulation (22) est en marche pendant une phase de remplissage (FP), un algorithme destiné à varier la vitesse de rotation (DZ) de la pompe de circulation (22) étant ménagé pour la phase de remplissage (FP), l'algorithme comprenant une étape de variation (VAS) pour la variation en forme de gradins de la vitesse de rotation (DZ) d'une valeur définie (VW) et une étape de contrôle (PS) pour la réalisation d'un contrôle de concentricité, l'étape de contrôle (PS) servant à constater si la pompe de circulation (22) se trouve en concentricité, avec la vitesse de rotation résultant pendant l'étape de variation (VAS) réalisée au préalable, ou ne s'y trouve pas, la pompe de circulation (22) se trouvant en concentricité lorsque suffisamment de liquide de lavage (S) est présent dans la chambre de lavage (7) afin d'éviter une aspiration d'air par la pompe de circulation (22), caractérisé en ce que pendant la phase de remplissage (FP), la vanne d'arrivée (18) est ouverte et la pompe de circulation (22) est en marche, et en ce que pour la phase de remplissage (FP), l'algorithme comprend en outre une étape de modification (VES) destinée à la modification de la valeur définie (VW) pour une nouvelle réalisation de l'étape de variation (VAS) en fonction d'un résultat de l'étape de contrôle (PS), la valeur définie (VW) étant supérieure ou égale à zéro au cas où le résultat de l'étape de contrôle (PS) soit que la pompe de circulation (22) se trouve en concentricité, et la valeur définie (VW) étant inférieure à zéro au cas où le résultat de l'étape de contrôle (PS) soit que la pompe de circulation (22) ne se trouve pas en concentricité.
  2. Lave-vaisselle selon la revendication précédente, caractérisé en ce que l'algorithme comprend une étape d'interruption (AS) destinée à achever la séquence de remplissage (F) lorsqu'une valeur finale (EDZ) prévue pour la vitesse de rotation (DZ) est atteinte et lorsque la pompe de circulation (22) se trouve de préférence en concentricité.
  3. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que si les résultats d'étapes de contrôle (PS) successives consistent en ce que la pompe de circulation (22) se trouve respectivement en concentricité, une augmentation de la valeur définie (VW) est prévue.
  4. Lave-vaisselle selon la revendication précédente, caractérisé en ce que l'augmentation de la valeur définie (VW) n'a pas lieu si une valeur maximale (VWM) prévue pour la valeur définie (VW) est atteinte.
  5. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que si les résultats d'étapes de contrôle (PS) successives consistent en ce que la pompe de circulation (22) ne se trouve pas respectivement en concentricité, une diminution de la valeur définie (VW) est prévue.
  6. Lave-vaisselle selon la revendication précédente, caractérisé en ce que la diminution de la valeur définie (VW) n'a pas lieu si une valeur minimale prévue pour la valeur définie (VW) est atteinte.
  7. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que si les résultats d'étapes de contrôle (PS) successives consistent en ce que la pompe de circulation (22) se trouve en concentricité pendant l'une des étapes de contrôle (PS) et qu'elle ne se trouve pas en concentricité pendant l'étape suivante (PS) ou en ce que la pompe de circulation (22) ne se trouve pas en concentricité pendant l'une des étapes de contrôle (PS) et se trouve en concentricité pendant l'étape de contrôle suivante (PS), la valeur définie (VW) est mise sur zéro.
  8. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que pendant une phase de préremplissage (VFP) réalisée avant la phase de remplissage (FP), la vanne d'arrivée (18) est ouverte et la pompe de circulation (22) est arrêtée, la durée de la phase de préremplissage (VFP) dépendant d'une valeur de temps définie.
  9. Lave-vaisselle selon la revendication précédente, caractérisé en ce_qu'au début de la phase de remplissage (FP), une valeur de départ (SDZ) est prévue pour la vitesse de rotation (DZ) telle que, en cas d'un courant de remplissage de liquide de lavage (S) situé dans une plage normale, la pompe de circulation (22) se trouve en concentricité lors de la première étape de contrôle (PS).
  10. Lave-vaisselle selon la revendication précédente, caractérisé en ce_qu'au début de la phase de remplissage (FP), la valeur définie (VW) correspond à sa valeur maximale (VWM) prévue.
  11. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que pendant une phase de remplissage ultérieur (NFP) réalisée après la phase de remplissage (FP), la vanne d'arrivée (18) est ouverte et la pompe de circulation (22) est en marche, la durée de la phase de remplissage ultérieur (NFP) dépendant d'une valeur de temps définie.
  12. Procédé de fonctionnement d'un lave-vaisselle (1), notamment selon l'une quelconque des revendications précédentes, comprenant un dispositif de commande (2) destiné à réaliser un cycle de lavage pour le nettoyage de produits à laver, comprenant une chambre de lavage (7) pour le logement des produits à laver pendant le cycle de lavage, comprenant une vanne d'arrivée (18) pouvant être ouverte et fermée au moyen du dispositif de commande (2) pour le remplissage de liquide de lavage (S) dans la chambre de lavage (7), comprenant une pompe de circulation (22) comportant un moteur électrique, destinée à faire circuler le liquide de lavage (S) se trouvant dans la chambre de lavage (7), dont la vitesse de rotation (DZ) est variable au moyen du dispositif de commande (2), et comprenant une unité de contrôle de concentricité (25) réalisée pour le contrôle de variations au moins d'un paramètre de fonctionnement électrique du moteur électrique, destinée à la réalisation d'un contrôle de concentricité de la pompe de circulation (22), notamment selon l'une quelconque des revendications précédentes, au moins une séquence de remplissage (F) étant réalisée pendant le cycle de lavage, lors de laquelle la pompe de circulation (22) est en marche pendant une phase de remplissage (FP), un algorithme destiné à varier la vitesse de rotation (DZ) de la pompe de circulation (22) étant réalisé pendant la phase de remplissage (22), une étape de variation (VAS) pour la variation en forme de gradins de la vitesse de rotation (DZ) d'une valeur définie (VW) et une étape de contrôle (PS) pour la réalisation d'un contrôle de concentricité étant réalisées lors de la réalisation de l'algorithme, l'étape de contrôle (PS) servant à constater si la pompe de circulation (22) se trouve en concentricité, avec la vitesse de rotation résultant pendant l'étape de variation (VAS) réalisée au préalable, ou ne s'y trouve pas, la pompe de circulation (22) se trouvant en concentricité lorsque suffisamment de liquide de lavage (S) est présent dans la chambre de lavage (7) afin d'éviter une aspiration d'air par la pompe de circulation (22), caractérisé en ce que pendant la phase de remplissage (FP), la vanne d'arrivée (18) est ouverte et la pompe de circulation (22) est en marche, et en ce que pendant la phase de remplissage (FP) lors de la réalisation de l'algorithme, une étape de modification (VES) est en outre réalisée pour la modification de la valeur définie (VW) pour une nouvelle réalisation de l'étape de variation (VAS) en fonction d'un résultat de l'étape de contrôle (PS), la valeur définie (VW) étant supérieure ou égale à zéro au cas où le résultat de l'étape de contrôle (PS) soit que la pompe de circulation (22) se trouve en concentricité, et la valeur définie (VW) étant inférieure à zéro au cas où le résultat de l'étape de contrôle (PS) soit que la pompe de circulation (22) ne se trouve pas en concentricité.
EP11167208.5A 2010-06-07 2011-05-24 Lave-vaisselle doté d'une séquence de remplissage dynamique Active EP2433546B1 (fr)

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PL2547247T3 (pl) 2010-03-18 2022-01-10 Electrolux Home Products Corporation N.V. Sposób napełniania wodą wanny myjącej zmywarki do naczyń
DE102011051356A1 (de) * 2011-06-27 2012-12-27 Miele & Cie. Kg Verfahren zur Durchführung eines Wassereinlaufs in den Spülbehälter eines Geschirrspülautomaten
US9839945B2 (en) 2014-05-02 2017-12-12 Electrolux Home Products, Inc. Methods, systems, and apparatuses for performing a quick cycle in a dishwasher
CN108289586B (zh) * 2015-11-19 2021-02-12 伊莱克斯电器股份公司 估算用于洗涤和冲洗物品的器具中的充水率

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US20070151579A1 (en) * 2005-12-30 2007-07-05 Hooker John K Methods and apparatus for controlling a dishwasher

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EP1029498A2 (fr) * 1999-02-19 2000-08-23 BSH Bosch und Siemens Hausgeräte GmbH Machine à laver la vaisselle à usage domestique
US20070151579A1 (en) * 2005-12-30 2007-07-05 Hooker John K Methods and apparatus for controlling a dishwasher

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US20110297189A1 (en) 2011-12-08
EP2433546A3 (fr) 2017-06-14
US9265399B2 (en) 2016-02-23
EP2433546A2 (fr) 2012-03-28

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