EP2377448B1 - Lave-vaisselle doté d'un dispositif d'amenée d'eau - Google Patents

Lave-vaisselle doté d'un dispositif d'amenée d'eau Download PDF

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Publication number
EP2377448B1
EP2377448B1 EP11158940.4A EP11158940A EP2377448B1 EP 2377448 B1 EP2377448 B1 EP 2377448B1 EP 11158940 A EP11158940 A EP 11158940A EP 2377448 B1 EP2377448 B1 EP 2377448B1
Authority
EP
European Patent Office
Prior art keywords
feed
water
sequence
control device
dishwasher
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.)
Not-in-force
Application number
EP11158940.4A
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German (de)
English (en)
Other versions
EP2377448A3 (fr
EP2377448A2 (fr
Inventor
Franz GRÜLL
Mathias Herrmann
Anton Oblinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Filing date
Publication date
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Publication of EP2377448A2 publication Critical patent/EP2377448A2/fr
Publication of EP2377448A3 publication Critical patent/EP2377448A3/fr
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Publication of EP2377448B1 publication Critical patent/EP2377448B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4229—Water softening arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0023—Water filling
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L2401/14—Water pressure or flow rate
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • 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
    • A47L2501/18—Water softening devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Definitions

  • the present invention relates to a dishwasher, in particular domestic dishwasher, with a control device for performing at least one rinse for cleaning items to be washed and with a water inlet device, which is connectable to receive feed water with an external water supply device, wherein the water inlet means open by the control device and closable inlet valve and an automatic flow adjustment to the pressure of the external water supply device largely independent setting of an adjusting with open inlet valve in a nominal pressure range of the flow adjustment adjusting inlet water flow.
  • A1 is a system for controlling the amount of water flowing from a water supply network in a water-bearing household appliance, in whose feed line a check valve and a free air gap are arranged known, wherein a first quantity control device is provided, which is a switched on in the supply line automatic throttle body, in a certain Pressure range results in a quasi-constant flow rate, and has a timer that closes the check valve after a certain opening time.
  • a second quantity control device is provided, which comprises a stagnation chamber, the air content of which is compressed by the water level rising in the tub, and a pressure sensor, which is able to close the check valve in priority.
  • the first quantity control device time control
  • the second quantity control device level control
  • a domestic dishwasher is known with a combined time and level control system that ensures adequate level over a wide range of commonly available water supply pressures.
  • the system includes a timed fill switch connected in series with a pressure-operated water level switch.
  • the pressure switch controls the filling when the dishwasher is supplied with water at normal supply pressures, and additionally protects against flooding caused by a clogged drain or faulty timer. Will the dishwasher against supplied with water at unusually low supply pressures, the pressure switch is bypassed.
  • the object of the present invention is to provide a dishwashing machine, in particular a household dishwasher, in which the intake of feed water is improved.
  • the rinse comprises at least one time-controlled feed sequence for receiving a predetermined amount of feed water, wherein the inlet valve is opened by the controller for a time corresponding to a preset time duration, the timer value according to a Embodiment, taking into account a characteristic Zulaufwasserstroms the water supply device measured in advance in the nominal pressure range by means of an external measuring device can be determined.
  • the control device of the dishwasher is designed for controlling and / or regulating effect on actuators of the dishwasher and thus allows automatic performance of rinses for cleaning items to be washed.
  • the control device can be designed as so-called sequence control, in particular as electronic sequence control.
  • the water supply device is designed to communicate with an external, i. outside the dishwasher, water supply device, in particular with a building-side installed water supply device such. Drinking water line, is connectable, so that the required to carry out rinsing water inlet can be added.
  • the water inlet device has an inlet valve, which can be opened and closed by the control device, so that the intake of feed water can be carried out automatically.
  • the inlet valve may in particular be a solenoid valve which can only be brought into an open position and into a closed position, which simplifies the construction of the dishwasher.
  • the water inlet device comprises a flow adjustment device, which is provided to the resulting at open inlet valve inlet water flow, ie the per unit time flowing amount of feed water, at least in one Nominal pressure range to influence so that the inlet flow is independent of the pressure of the external water supply device.
  • the nominal pressure range is understood to be, in particular, the working range of the flow adjustment device, in which the supply water flow lies in a predetermined tolerance range, for example in a tolerance range of +/- 10%, preferably +/- 5%, particularly preferably +/- 3%.
  • the flow setting device works automatically, in particular according to a mechanical principle, so that a control by the control device is not required. Likewise, a sensor for measuring the feed water flow is not required. Such a flow adjuster is sometimes called a flow restrictor or, not quite correctly, a flow regulator.
  • the respective inlet valve during an opening period which essentially corresponds to the time value, in particular permanently or continuously remain open, so that the water during this opening period of the inlet valve continuously tapers into the dishwasher.
  • the respective inlet valve is opened and closed repeatedly or partially for partial opening periods, in particular clocked by opening and closing such that the sum of its partial opening periods substantially corresponds to the respective preset time value and one with
  • the supply water quantity corresponding to the time value is introduced in portions or in stages into the dishwasher or is taken up by it.
  • feed sequence thus includes, inter alia, in particular both such a continuous feed process and also a feed process which is divided in a stepwise or discrete manner.
  • the pressure of the external water supply device Due to the pressure of the external water supply device, in particular in its nominal pressure range, largely independent adjustment of the feed water flow by means of the flow adjustment is here at least in the nominal pressure range, the recorded amount of feed water substantially proportional to the opening duration of the inlet valve and thus to the time value.
  • the intended amount of feed water can be absorbed without the need for a sensor to determine the amount of feed water actually received.
  • the characteristic inlet water flow is preferably the actual feed water flow of an individual water inlet device, which adjusts to a supply to a water supply device, which supplies feed water in the nominal pressure range, with open inlet valve.
  • the measurement of the characteristic feed water flow takes place before the execution of the respective filling sequence. Since the characteristic supply water flow usually remains constant over a relatively long period of time, it is sufficient in many cases if it is measured only once, for example before the first start-up of the dishwasher. In particular, the measurement can be carried out as part of the factory final inspection prior to delivery of the dishwasher or when setting up the dishwasher at the site.
  • CMD Coriolis mass flowmeter
  • the relationship between opening time and recorded amount of feed water at an individual, ie respectively given water inlet device can be detected with high accuracy.
  • the timing value leading to the intake of the intended amount of feed water can be accurately determined. This in turn means that the intended amount of feed water is maintained with the highest accuracy during operation of the dishwasher when carrying out the feed sequence becomes.
  • a measurement of the actually recorded amount of feed water in the feed sequence is not required here. Therefore, the water inlet device of the dishwasher according to the invention requires no extra or additional transducer that detects the actually recorded amount of feed water.
  • the high accuracy can be achieved even with a deviation of the actual flow characteristic of the respective individual water supply device from a planned target flow characteristic.
  • Such deviations can be caused, for example, by series production of the flow through the components of the water inlet device, for example the inlet valve and / or the flow adjusting device and / or the water inlet line.
  • inlet valves and / or flow setting device and / or water supply line with larger scattering ranges. Therefore, in many cases, more cost effective components can be used.
  • the characteristic feed water flow can be stored in advance in the control device, wherein the control device is designed to determine the time specification value taking into account the entered characteristic feed water flow.
  • the control device may have a reserved storage space in a preferably non-volatile memory for storing the characteristic feed water flow.
  • the time value can then be automatically determined for each feed phase on the basis of the amount of feed water provided for this purpose.
  • the determination of the timing value may be made on the basis of value tables or the like stored in the controller.
  • the time value can be stored in advance in the control device.
  • the determination of the required timing values can be done externally taking into account the characteristic Zulaufwasserstroms, so that the control device can be made simpler.
  • the control device can in each case have a reserved memory space for storing a time specification value corresponding to the respective quantity in a preferably non-volatile memory.
  • a data interface is provided, via which the control device can be connected to the external measuring device in order to store the measured characteristic inlet water flow and / or the time value determined therefrom, preferably automatically in the control device.
  • the deposit of the measured characteristic feed water flow can be performed automatically, so that the preparation of the dishwasher for performing rinsing operations is simplified.
  • transmission errors can be avoided, which are avoided in a manual input of the characteristic Zulaufwasserstroms and / or the timeout value determined therefrom.
  • the nominal pressure range comprises at least the range from 1 bar to 6 bar, preferably from 0.75 bar to 8 bar, particularly preferably from 0.5 bar to 10 bar.
  • the mentioned nominal pressure ranges ensure a wide range of application of the dishwasher. In particular, exact intake quantities of feed water can be ensured even with larger pressure fluctuations of the external water supply device.
  • the measurement of the characteristic feed water flow takes place in a middle region of the nominal pressure range, for example in a range from 2 bar to 4 bar.
  • a characteristic inlet water flow measured in this way represents the inlet water flow which adjusts over the entire nominal pressure range particularly well, since, according to experience, the flow characteristic in the medium nominal pressure range runs almost ideally.
  • the flow adjustment device has at least one throttle body operable by the inlet water for influencing the cross-section through which the feed water flow can flow.
  • the throttle body may be mounted such that it can be deflected against the pressure of a spring by the pressure of the feed water flow from a rest position such that it reduces the flow-through cross section of the flow adjustment as a function of pressure so that adjusts a quasi-constant supply water flow.
  • the influencing of the flow-through of the feed water flow cross-section is effected by an elastic deformation of the throttle body.
  • the flow adjustment device can have as a throttle body a disk of an elastic material, such as rubber, oriented transversely to the feed water flow, which deforms with increasing inlet water flow in such a way that it increasingly closes one or more throughflow openings formed downstream of the disk.
  • At least one of the time-controlled feed sequences for receiving a predetermined amount of feed water is provided for in each case one water-carrying partial wash cycle of the wash cycle.
  • a typical rinse cycle of a dishwashing machine comprises in particular at least one pre-rinse cycle for pre-cleaning items, at least one cleaning cycle for thorough cleaning of items to be washed, at least one intermediate rinse for removing soiled rinse liquid from the items to be washed, at least one rinse cycle to avoid stains on items to be washed and / or for preparation of items Drying step, and / or at least one drying cycle for drying the dishes.
  • Rinse cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-carrying partial rinses, since during their implementation, the introduced into the rinsing chamber items to be treated with a rinsing liquid.
  • a use of rinsing liquid is usually not provided.
  • a softening device with an ion exchanger which can be maintained by means of an automatically executable maintenance sequence, wherein the maintenance sequence comprises at least one regeneration process for regenerating the ion exchanger and / or at least one flushing process for rinsing the ion exchanger and at least one the time-controlled feed sequences for receiving a predetermined amount of feed water for the regeneration process and / or the flushing process is provided.
  • a high hardness former content, for example lime and / or magnesium content, of the rinsing liquid provided in the dishwasher for loading items is detrimental to the rinsing result, since the limescale settles on the items to be washed and can therefore cause unwanted clouding, especially in the case of glassware.
  • the softening device may comprise an ion exchanger for softening and / or desalting water and a maintenance device for servicing the ion exchanger.
  • the ion exchanger may contain a resin having the property of sorbing calcium ions or magnesium ions dissolved in the feed water, thereby reducing the lime content of the feed water.
  • a maintenance device may be provided, which is designed for automatic maintenance of the ion exchanger.
  • the maintenance of the ion exchanger expediently comprises at least one regeneration process and at least one flushing process.
  • the ion exchanger can be supplied with a regenerating brine previously prepared from water and regenerating agent, in particular regenerating salt, which essentially contains sodium chloride in aqueous solution.
  • regenerating brine previously prepared from water and regenerating agent, in particular regenerating salt, which essentially contains sodium chloride in aqueous solution.
  • the regenerating brine is usually prepared in a Regeneriersole worn and kept ready until the beginning of the respective regeneration process to be performed. From the regenerating brine device, the regenerating brine can then be passed into the ion exchanger at the beginning of the regeneration step by the regenerating brine being pressed into the ion exchanger by feed water taken in as part of a timed feed sequence.
  • the amount of intake water absorbed corresponds to this just the amount of pressed into the ion exchanger amount of regenerating brine.
  • the ion exchanger is flushed through by a feed water from the water inlet device in a flushing process, so as to dissipate the regenerating brine from the ion exchanger, so that the ion exchanger is again available for water softening after an advantageous development.
  • the control device is designed to determine the total amount of water softened by the softening device and to initiate the maintenance sequence as a function of the determined total quantity and depending on the hardness of the feed water.
  • the total amount of the softened feed water can be determined with high accuracy in an advantageous manner by starting from the completion of a maintenance sequence, the absorbed amounts of feed water or the timing of those feed sequences are added, the feed water is softened. These are usually those feed sequences which are carried out to form a rinse liquid for a water-carrying section réellegang.
  • the hardness of the feed water which represents the amount of hardness in the feed water, can be determined with great accuracy, whether the ion exchanger still has a sufficient capacity for softening of feed water, or whether a further maintenance sequence is required. This ensures that a maintenance sequence is performed only when it is actually required. This leads in particular to a reduction of the water and / or regenerant consumption of the dishwasher, without the dishwashing result being impaired.
  • the rinse cycle comprises at least one time-controlled feed sequence for receiving a predetermined amount of feed water, in which the feed valve is opened by the control device for a duration corresponding to a time value, wherein an optionally activatable additional feed sequence assigned to the feed sequence, in which the feed valve passes through the control device is open for a duration corresponding to an additional time specification, can be activated if the pressure of the external water supply device is below a predetermined minimum pressure.
  • an optionally activatable additional feed sequence assigned to the feed sequence in which the feed valve passes through the control device is open for a duration corresponding to an additional time specification, can be activated if the pressure of the external water supply device is below a predetermined minimum pressure.
  • the minimum pressure below which the activation of the additional feed sequence is provided may be determined in accordance with the flow characteristic of the respective individual water feed device. According to the invention, the minimum pressure is set to be equal to or slightly higher than the lower limit of the nominal pressure range. In this way, the intake of a sufficient amount of feed water can be ensured even below the nominal pressure range and possibly in a lower region of the nominal pressure range in which the flow characteristic drops below the characteristic inlet water flow. On the other hand, if the dishwasher is operated above the minimum pressure, then the additional feed sequence can remain deactivated so that no disadvantageous changes in consumption result under standard conditions.
  • the additional feed sequence as well as the (main) feed sequence is time-controlled, it is possible to dispense with the impeller counter frequently used in the area of the water feed device in conventional dishwashers, which benefits a simple design of the dishwasher.
  • the additional time preset value can be selected so that too low a recording is prevented even under the most unfavorable conditions.
  • the pipe interrupters usually used as backflow preventers in the area of the water feed device at dishwashing machines have an increasing proportion of leakage water at a lower pressure, which is then not available, for example, during the maintenance of the ion exchanger.
  • the additional time specification value can be stored as a fixed value in the control device or determined by the control device according to an algorithm be taken into account, for example, the intended for inclusion amount of feed water and / or the actual or expected pressure of the water supply device.
  • an operating device is provided which allows manual activation of the additional feed sequence by an operator.
  • the operating device can be an operating device provided for the general operation of the dishwasher by its user, such as an operating button or option button, which, for example, primarily serves to select and start a washing program for performing a washing cycle.
  • a dedicated operating device, in particular additional key be provided for manual activation of the additional feed sequence by an operator.
  • it may be an additional operating device, which is provided only for operation by trained specialist personnel, for example by customer service personnel.
  • the activation or deactivation of the additional feed sequence can then take place on the basis of the properties of that external water supply device to which the dishwasher is connected at the installation site.
  • the control device is designed to detect an undershooting of the minimum pressure by evaluating at least one measurement of a sensor carried out during one of the feed sequences and to automatically activate the additional feed sequence in the event of a detected undershoot.
  • the measurement can refer to any metrologically detectable variable, which allows a statement about whether the minimum pressure has fallen below or reached.
  • the measurement can take place, for example, during the first inflow sequence of a rinse cycle, wherein the additional inflow sequence can be activated when the minimum pressure falls below both the first inflow sequence and also for further inflow sequences of the rinse cycle.
  • control device is designed to automatically determine the additional time specification value taking into account the measurement.
  • the duration of the additional feed sequence can be adapted to the actual pressure of the external water supply device.
  • the additional feed sequence can be extended with decreasing pressure and shortened with increasing pressure, so as to be able to record the intended amount of feed water as accurately as possible.
  • the sensor for detecting at least one operating parameter of a pump in particular a circulating pump or lye pump, which is supplied to the feed water in the feed sequence, formed.
  • the feed water received during a feed sequence is in many cases fed to a running pump for further pumping.
  • This may be, for example, a circulating pump for circulating the feed water as flushing liquid or a drain pump for pumping out the feed water as wastewater.
  • operating parameters of the respective pump change, i.a. depending on the feed rate and / or supply amount of feed water, which are both dependent on the pressure of the external water supply device. If such an operating parameter is detected, it is possible to deduce the pressure of the external water supply device without the need for an original pressure sensor, which simplifies the construction of the dishwasher.
  • the operating parameter represents the electrical power consumption of the pump.
  • the pumps of dishwashers with electric motors such as brushless DC motors (BLDC motor), driven.
  • BLDC motor brushless DC motors
  • the power consumption of the respective pump correlates directly with the pressure of the external water supply device, so that in this way the pressure can be reliably detected.
  • the electrical power can be relatively easily, for example by a current measurement, detected.
  • the pump of a dishwasher is anyway associated with a sensor for detecting their power consumption, for example, to adjust the flow rate, so that the minimum pressure can be carried out with extensive use of already existing components.
  • the detection of an undershooting of the minimum pressure takes place by evaluating a plurality of measurements.
  • the informative value of the evaluation can be improved, so that the additional feed sequence is only activated, if this is necessary.
  • measurement errors and / or changes in the operating parameter, which are independent of the pressure of the water supply device can thus be at least partially compensated.
  • the first measurement takes place at the end of a partial feed sequence for receiving a subset of the total amount of feed water intended for the feed sequence.
  • distortions of the measurement which are based on the fact that at the beginning of the feed sequence residual water from a previous feed sequence in the pump area, at least be reduced.
  • the feed sequence comprises a plurality of successive partial feed sequences for receiving a subset of the feed sequence for a total provided amount of feed water, wherein the measurements are carried out at the end of each of the partial feed sequences.
  • the partial intake sequences at the end of which one of the measurements takes place, are designed to receive equal subsets of the total amount of feed water intended for the intake sequence. This simplifies the evaluation of the large number of measurements.
  • the subsets are less than 20%, preferably less than 15% and particularly preferably less than 10%, of the total amount of feed water intended for the feed sequence. In this way, a variety of measurements can be made, which further improves the monitoring of the minimum pressure.
  • the measurements take place at times at which the uptake of not more than 50%, preferably not more than 40% and particularly preferably not more than 30%, of the total supply sequence provided for the amount of feed water is provided.
  • the influence of disturbance variables increases in the course of the respective feed sequence. For example, when circulating the rinsing liquid formed from the feed water, an increasing proportion of rinsing liquid for the circulation cycle is lost through rinsing liquid adhering to the items to be washed, so that the power of the circulating pump drops below a value that would be observed without this effect. Likewise, increasing pollution can lead to a further influence on the power consumption.
  • the invention also relates to a method for carrying out at least one rinse cycle for cleaning items to be washed by means of a control device of a dishwasher, in particular a dishwasher according to one of the preceding claims, which comprises a water inlet device, which is connectable to receive an inlet water with an external water supply device, wherein the water inlet device has an inlet valve which can be opened and closed by the control device and an automatic flow setting device for setting an inlet water flow which is largely independent of the pressure of the external water supply device and which adjusts when the inlet valve is open in a nominal pressure range of the flow control device.
  • At least one time-controlled feed sequence for receiving a predetermined amount of feed water is carried out in the rinse, wherein the inlet valve by the control device for a given time value corresponding duration is opened, wherein one of the inlet sequence associated optionally activatable time-controlled additional intake sequence in which the inlet valve is opened by the controller for a waivezeitvorgabewert corresponding duration, is activated when the pressure of the external water supply device is below a predetermined minimum pressure.
  • the inventive method allows a simple, fast and needs-based filling of the dishwasher with feed water and is characterized by low demands on the structural design of the dishwasher.
  • FIG. 1 shows an advantageous embodiment of a household dishwasher according to the invention 1 in a schematic side view.
  • the dishwasher 1 has a control device 2, in which at least one wash program for controlling a wash cycle for washing dishes, in particular dishes, is deposited.
  • a plurality of washing programs are stored, so that by selecting a suitable washing program, the sequence of a controlled by the control unit 2 rinse, for example, to the load, to the type of load, to the degree of contamination of the dishes and / or to the desired duration of the wash can be adjusted.
  • the control device 2 is associated with an operating device 3, which allows an operator of the dishwasher 1 to call one of the washing programs and thereby start. Furthermore, the control device 2 is associated with an output device 4, which allows the output of messages to the operator.
  • the output device 4 may comprise indicator lamps, light-emitting diodes, an alpha-numeric display and / or a graphic display for outputting optical messages. Furthermore, the output device 4 may have a buzzer, a loudspeaker and / or the like for the output of acoustic messages.
  • the dishwasher 1 further comprises a rinsing container 5, which can be closed by a door 6, so that a closed rinsing chamber 7 is formed for rinsing dishes.
  • the rinsing container 5 can be arranged inside a housing 8 of the dishwasher 1. In built-in dishwashers, the housing is 8 not required and may be omitted altogether at the top.
  • the 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 aligned substantially horizontally and allows the introduction or removal of items to be washed.
  • the operating device 3 is arranged in an easy to use manner on an upper portion of the door 6.
  • the output device 4 is also arranged on the upper portion of the door 6, so that optical messages are clearly visible and audible 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. In particular, according to an alternative embodiment, the control device 2 may possibly also be accommodated in a base module below the washing compartment 5.
  • the control device 2 could also be designed decentralized, which is understood to include spatially separated components, which are connected via communication means such that they can cooperate.
  • the dishwasher 1 has an upper dish rack 9 and a lower dish rack 10 for positioning dishes.
  • the upper dish rack 9 is arranged on extension rails 11, which are each attached to opposite, extending in the depth direction of the washing compartment side walls of the washing compartment 5.
  • the dish rack 9 can be moved out of the washing container 5 by means of the extension rails 11, which facilitates the loading and unloading of the upper dish rack 9.
  • the lower dish rack 10 is arranged on extension rails 12 in an analogous manner. He is in the approximately horizontal Offenend ein the door on this out, i. The door forms a kind of support table for him.
  • the one or more stored in the control device 2 washing programs can each provide several Opera Standerie, for example, in this order at least one prewash, at least one cleaning cycle, at least one intermediate rinse, at least one rinse and / or at least one drying cycle.
  • pre-wash cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-carrying partial rinses, since during their implementation, the items to be washed positioned in the rinsing chamber 7 are treated with a rinsing liquid S.
  • a treatment of the items to be washed with rinsing liquid S is usually not provided.
  • fresh water or feed water ZW is used which consists of a dishwashing machine external, i. outside the dishwasher existing water supply device WH, in particular a building-side drinking water pipe, which is connected to the public drinking water supply network, removed and filled into the rinsing chamber 7, i. the dishwasher picks up fresh water from the dishwasher-external water supply device.
  • a rinsing liquid S formed from fresh feed water ZW is introduced at the beginning of each water-conducting partial rinse cycle, which rinse liquid is then discharged to the end of the respective rinse cycle to an external sanitation AR as wastewater AW.
  • the dishwasher 1 the FIG. 1 comprises a water inlet device 13, which is provided for connection to the external water supply device WH.
  • the external water supply device WH may be a faucet of a building water installation that 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 threaded arrangement, a bayonet arrangement or the like.
  • Downstream of the connecting piece 14 is a connecting line, in particular a connecting hose 15 is provided, which is preferably designed to be flexible.
  • the downstream end of the connection tube 15 is connected to a housing-fixed connection piece 16.
  • the downstream side of the housing-fixed connection piece 16 is connected in fluid-conducting manner to an input side of an inlet valve 17, which can be switched by means of the control device 2, of the water inlet device 13.
  • the inlet valve 17 may be formed as a switchable solenoid valve having only an open position and a closed position.
  • an external inlet valve in particular a so-called aqua-stop valve be provided, which is preferably switchable by means of the control device 2, in particular shut-off and openable.
  • an output side of the inlet valve 17 is fluidly connected to a flow adjuster 18, which is intended to influence the inlet flow when the inlet valve 17 is open, ie the per unit time flowing amount of feed water ZW, at least in a nominal pressure range so that the inlet flow largely regardless of the pressure of the external water supply device WH.
  • the flow adjuster 18 operates automatically, in particular according to a mechanical principle, so that a control by the control device 2 is not required.
  • the flow adjuster 18 may have a not shown by the inlet water ZW operable throttle body for influencing the flow-through of the feed water flow cross-section.
  • the throttle body can be mounted such that it can be deflected against the pressure of a spring by the pressure of the feed water from a rest position such that it reduces the flow-through cross section of the flow adjustment 18 as a function of pressure so that adjusts a quasi-constant supply water flow.
  • the influencing of the flow-through of the feed water flow cross-section can be effected by an elastic deformation of the throttle body.
  • the flow-through device can in particular also be part of the inlet-side inlet valve 17, in particular the Aquastop valve, i. be integrated in the inlet valve 17.
  • This may be different from the illustrated embodiment in particular coupled to the faucet WH, in particular screwed, i. it is connected in this advantageous embodiment variant as an external component directly to the faucet WH.
  • a backflow preventer 19 Downstream of the flow adjuster 18, a backflow preventer 19 is provided, which is preferably designed as a pipe interruption 18 and which forms the downstream end of the water inlet device 13.
  • the non-return valve 19 serves to prevent a sucking back of liquids from the dishwasher 1, if a negative pressure is created in the external water supply device by dynamic processes. This prevents in particular that already used Zulaufwasser ZW, which may be offset with dirt, cleaning agents, cleaning aids and / or regenerants, back into the external, in particular building-side water supply WH arrives.
  • the pipe interruption 19 In order to be able to derive controlled leak water LW in the region of the pipe interruption 19, the pipe interruption 19 is assigned a leakage water outlet 20 which opens into the rinsing chamber 7.
  • An exit side of the pipe break 19 is connected to an input side of a softener 21.
  • a softener 21 In this way it is possible to soften the inlet water ZW received by means of the water inlet device 13 before it reaches the rinsing chamber 7 as soft water W via a water inlet 22 connected to the outlet side of the softening device 21.
  • the soft water W which has reached the rinsing chamber 7 via the water inlet 22 can now be used as rinsing liquid S.
  • the rinsing liquid S passes into a collection device 24 formed on a bottom 23 of the rinsing container 5, which can preferably be designed as a collecting pot.
  • An input side of a circulation pump 25 is liquid-conducting connected to the collecting pot 24.
  • an output side of the circulating pump 25 is connected to a spraying device 26, 27, which makes it possible to apply the washing material S introduced into the washing chamber 7 with washing liquid S.
  • the sprayer 26, 27 may comprise an upper rotatable spray arm 26 and a lower rotatable spray arm 27.
  • fixed and / or other movable spray elements could be provided.
  • the circulating pump 25 can be a sensor 28 Monitoring be assigned at least one operating parameter of the circulation pump 25.
  • the dishwasher 1 may conventionally have a metering device 29, which makes it possible to put the rinsing liquid S introduced into the rinsing chamber 7 with one or more cleaning agents and / or cleaning aids in order to improve the cleaning effect and / or the drying effect of a rinse cycle ,
  • the drainage device 30 comprises a drain pump 31, the inlet side of which is connected to the collection pot 24.
  • the outlet side of the drain pump 31, however, is connected to a housing-fixed connection 32 of the dishwasher 1.
  • a sewer pipe in particular a waste water hose 33 is attached, which is preferably designed to be flexible.
  • a fitting 34 is arranged, which is intended to connect the drainage device 30 with a sanitation AR.
  • the sanitation device AR can be, for example, a sewer pipe AR of a building-side water installation.
  • connection between the connecting piece 34 and the sewage pipe AR can be designed as a screw connection, as a bayonet connection, as a plug connection or the like.
  • the dishwasher 1 has a data interface 35, via which information can be read from the control device 2 and / or entered into the control device 2.
  • the data interface 35 is arranged on the rear side of the dishwasher 1, so as to minimize impairment of the visual appearance of the dishwasher 1. But it could also be provided elsewhere.
  • FIG. 2 shows a block diagram of the household dishwasher 1 of FIG. 1 , wherein in particular the softening device 21 and the control and communication concept are shown in more detail.
  • the softening device 21 comprises a switching valve 36, a regenerant tank 37 and an ion exchanger 38.
  • the switching valve 36 may be a water switch, in particular a 3-way valve, which has an input and two outputs.
  • the water switch 36 makes it possible, in a first operating position A represented by a solid line, to supply the inlet water entering the pipe interruption 19 to the ion exchanger 38.
  • a second operating position B of the water switch 36 shown with a dotted line, the feed water entering via the pipe break 19 can be supplied to the regenerating agent tank 37, which can be filled with a regenerating agent RM.
  • the first operating position A of the filling of the washing chamber 7 with soft water W and the second operating position B of the maintenance of the ion exchanger 38 is used.
  • a signal line 39 is further provided, which connects the operating device 3 with the control device 2 such that operating commands of an operator from the operating device 3 to the control device 2 are transferable.
  • a signal line 40 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 41 is provided, which connects the control device 2 with the switchable inlet valve 17 such that the inlet valve 17 can be closed or opened by the control device 2. In this way, the intake of feed water ZW can be controlled by the control device 2.
  • a further control line 42 connects the control device 2 with the circulation pump 25. In this way, the circulation of rinsing liquid S in the rinsing chamber 7 by the control device 2 is adjustable, in particular controllable or adjustable.
  • a signal line 43 is provided, which connects the sensor 28 with the control device 2.
  • the signal line 43 makes it possible to transmit information generated by the sensor 28 regarding the running properties of the circulating pump 25 to the control device 2.
  • the control device 2 is designed so that it can take into account this information from the sensor 28 in the circuit, in particular in the control of the closing and / or opening times, possibly also control or regulation of the inlet valve 17.
  • a control line 44 is provided, which connects the control device 2 with the drain pump 31, so that the drain pump 31 by the control device 2 switchable, in particular off and on, is.
  • a control line 45 is provided, which connects the control device 2 with the water diverter 36, so that the water diverter 36 can also be switched by the control device.
  • a preferably bidirectional data line 46 further enables information transmission between the control device 2 and the data interface 35.
  • a predetermined amount of feed water ZW is predefined on the basis of rinse-technological considerations, in particular on the basis of empirical values.
  • the recording Such a predetermined amount of feed water ZW is now carried out with a timing sequence controlled by the control device 2, in which the feed valve 17 is opened for a duration corresponding to a time preset value. Due to the largely independent of the pressure of the external water supply device WH setting the Zulaufwasserstroms means of the flow adjuster 18 here at least in the nominal pressure range, the absorbed amount of feed water ZW is substantially proportional to the opening duration of the inlet valve 17 and thus to the timing value.
  • the amount of feed water ZW received during the opening period of the inlet valve 17 corresponds to the product of the opening duration and the feed flow or throughput which occurs. This, in turn, depends essentially on the permeability of the water inlet device 13 and, in this case, in particular on the permeability of the flow adjuster 18.
  • FIG. 3 shows a family of flow characteristics K, K ', K "identical water supply means 13 of household dishwashers 1 according to the FIGS. 1 and 2 ,
  • the pressure p of the feed water ZW supplying water supply device WH and on the ordinate of the adjusting Zulaufementstrom or water flow rate Q is shown on the abscissa.
  • a first exemplary flow characteristic K of a first water feed device 13 extends in a nominal pressure range NB of the flow setting device 18 substantially horizontally.
  • the nominal pressure range NB is understood to mean in particular the working range of the flow setting device 18, in which the flow characteristic K is within a predetermined tolerance range, for example within a tolerance range of +/- 10%, preferably +/- 5%, particularly preferably +/- 3%. around a mean inlet water flow QM runs.
  • the nominal pressure range NB preferably comprises at least the range from 1 bar to 6 bar, preferably from 0.75 bar to 8 bar, particularly preferably from 0.5 bar to 10 bar.
  • the named nominal pressure ranges NB ensure a wide range of application of the dishwasher 1. In particular, exact intake quantities of Inlet water ZW be ensured even with larger pressure fluctuations of the external water supply device WH.
  • the flow characteristic K runs in a central region MNB of the nominal pressure range NB such that the feed water flow Q corresponds to the mean intake water flow QM.
  • the flow characteristic curve K continues to decrease with decreasing pressure p, so that the feed water flow Q drops below the mean intake water flow QM.
  • a lower limit GD U of the nominal pressure range NB the flow characteristic K decreases increasingly more, so that it is no longer possible to speak of a quasi-constant supply water flow.
  • the flow characteristic curve K continues to increase with increasing pressure p, so that the feed water flow Q rises above the mean intake water flow QM. This is especially true in the range above an upper limit GD O of the nominal pressure range NB, so that even here can no longer speak of a quasi-constant supply water flow.
  • FIG. 3 a second exemplary flow characteristic K 'another water inlet device 13, for which the above applies analogously.
  • the further water inlet device 13 due to series variations on a modified flow characteristics.
  • the mean inlet water flow QM 'in the flow characteristic K' is significantly above the mean inlet water flow QM of the flow characteristic curve K.
  • FIG. 3 3 shows a third exemplary flow characteristic K "of a third water feed device 13 whose mean feed water flow QM" is significantly below the mean feed water flow QM of the flow characteristic curve K.
  • the individual characteristic K, K ', K "of the respective water inlet device 13 can be taken into account, so that the amount of feed water ZW provided for receiving can be precisely maintained when the feed sequence is carried out QC, QC ', QC "performed in the central region MNB of the nominal pressure range NB, since so very accurate filling quantities can be realized.
  • the characteristic Zulaufiganstrom or Wassmengen penficient QC, QC ', QC corresponds to an actual Zulaufiganstrom or inlet water flow rate of an individual water inlet device 13, which supplies at a connection to a water supply device WH, which supply water ZW in the nominal pressure range NB, with open inlet valve 17th
  • the respective characteristic feed water flow QC, QC ', QC can for example be automatically stored via the data interface 35 or manually via the operating device 3 in the control device 2.
  • the timer value can be determined externally and, for example, automatically stored in the control device 2 via the data interface 35 or manually via the operating device 3.
  • FIG. 4 shows exemplary temporal sequences basically similar rinses SG, SG ', SG "identical inventive dishwasher 1 of the embodiment on a common time axis T.
  • the rinse cycle SG comprises four water-carrying partial rinses, namely a pre-wash cycle VG, an intermediate rinse cycle ZG, a cleaning cycle RG and a rinse cycle KG.
  • the wash cycle SG largely comprises a drying cycle TG in which intake of feed water ZW is not provided.
  • a curve Z17 is shown on the time axis t, which shows the operating state of the inlet valve 17.
  • the inlet valve 17 may assume an operating state "0", in which it is closed, and an operating state "1", in which it is open.
  • the water diverter 36 is switched by the control device 2 so that they are in the in FIG. 2 shown operating position A is located.
  • the soft water W is circulated as rinsing liquid S by means of the circulating pump 25 controlled by the control device 2 via the spray system 26, 27 so as to treat the items to be washed.
  • the rinse liquid S is pumped out by means of the drain pump 31 also controlled by the control device 2.
  • the supply valve 17 is continuously opened during the feed sequence Z 1 , so that the duration of the feed sequence Z 1 just corresponds to the opening time of the inlet valve 17.
  • the sum of the individual opening times of the inlet valve 17 corresponds to the time value ZV 1 , so that in this case too, the intended amount of inlet water ZW could be accommodated.
  • the rinse SG includes a maintenance sequence RV, DV for the maintenance of the ion exchanger 38.
  • the maintenance sequence RV, DV is also controlled automatically by the control device 2. It can be provided that the maintenance sequence is carried out only when the ion exchanger 38 is exhausted, d. H. if he has already taken so many hardeners that he can no longer sufficiently soften the additional inlet water ZW to be absorbed.
  • the control device 2 may comprise a counter which determines the total amount of the amount of feed water ZW, possibly over a plurality of rinse cycles, by means of the feed sequences Z performed. From this and from the degree of hardness of the available feed water ZW, the controller 2 can then determine whether the ion exchanger 38 still has a sufficient softening capacity or whether it must be maintained. It can be provided that the counter is reset after maintenance.
  • the degree of hardness of the feed water ZW can for example be input via the operating device 3 and stored in the control device 2.
  • rinse SG has been determined by the controller 2 that a maintenance sequence RV, DV for servicing the ion exchanger 38 is required.
  • this comprises a regeneration process RV and a purging process DV, the regeneration process RV being carried out during the cleaning cycle RG and the purging process DV between the cleaning cycle RG and the intermediate rinse cycle ZG.
  • the maintenance sequence RV, DV could also be integrated in another way in the sequence of General Touch réelle VG, RG, ZG, KG, TG. For example, it could also be carried out at the end or after the end of the respective dishwashing program.
  • a feed sequence Z 3 for receiving the amount of feed water ZW required for the regeneration process RV is automatically carried out by the control device 2.
  • the inflow valve 17 is opened during the inflow sequence Z 3 of the regeneration process RV for a period of time which corresponds to a predetermined time value ZV 3 .
  • the timing value ZV 3 is also taking into account the characteristic Zulaufwasserstrom QC, as to the hand FIG. 3 has been determined, so that the intended for the regeneration process RV amount of feed water ZW, which may be significantly smaller than that for a water-bearing Opera
  • RG, ZG, KG can be recorded with high accuracy.
  • the regenerating brine remains in the ion exchanger 38 until the beginning of the rinsing process DV, thereby taking on the hardness constituents attached there, so that the ion exchanger 38 again acquires a capacity for softening feed water ZW.
  • the regenerating brine now in the ion exchanger 38 is generally not suitable for cleaning the dishes. Therefore, a purging DV is now provided, at its beginning a feed sequence Z 4 for receiving the required amount of the purging DV of water supplied ZW automatically performed by the controller. 2
  • the unchanging DV water diverter 36 is switched back to its operating position A, so that the recorded inlet water ZW the rinsing in the ion exchanger 38 Regeneriersole located.
  • the regenerating brine which reaches the rinsing chamber 7 via the water inlet 22 during the flushing process DV can then be pumped out by means of the brine pump 31.
  • the inlet valve 17 is opened for a period corresponding to another timing value ZV 4 , which has also been determined taking into account the characteristic Zulaufwasserstrom QC, so that provided for the für Cyprusvorgang DV amount of feed water ZW with high accuracy can be recorded.
  • ZV 4 another timing value
  • the second in the FIG. 4 shown rinse SG ' corresponds to the above-described rinse SG.
  • the water inlet device 13 of the dishwashing machine 1 used in this case has the in FIG. 3 shown characteristic K 'on. Therefore, the measurement performed in advance results in a higher characteristic inflow or throughput QC '.
  • Rinse cycle SG shown corresponds to the above-described rinse cycle SG.
  • the water feed device 13 of the dishwasher 1 used here has the in FIG. 3 This results in the previously performed measurement a smaller characteristic inlet flow or throughput QC ".
  • the invention particularly relates to a dishwasher, which with a flow restrictor or a flow regulator Is provided.
  • the limiter or regulator limits the volume flow preferably in a nominal pressure range between 0.5 to 6.0 bar to a nominal 2.5 l / min.
  • the calibration measure according to the invention also makes it possible to regroup the respective dishwasher in terms of its consumption values (in particular, power and / or water consumption values, resource consumption values, etc.) for better classifications.
  • a preliminary measurement or a type of calibration of the filling valve is carried out with regard to its characteristic throughput behavior, preferably at the factory or by the factory customer service, eg in the case of maintenance or delivery of the respective dishwasher.
  • the filling valve or inlet valve is representative of one or more other components of the water inlet device of the dishwasher or the entirety of the water inlet device.
  • the characteristic, actual throughput of this valve is measured by means of an external, in particular factory measuring device, preferably in the nominal pressure range of the respective existing external water supply.
  • this measured throughput which describes in the nominal pressure range of the external water pipe a characteristic property for the flow behavior of the respective valve, preferably stored in the control device of the dishwasher.
  • a predetermined or desired set amount of liquid that is actually intended to flow through the feed valve into the dishwasher as the actual feed water quantity is unambiguously assigned a specific, specific time specification value.
  • the respective preset time value is thus the time duration which requires the respective desired inflow water quantity to be supplied for its passage through the respective inflow valve. Because of the almost horizontal characteristic curve for the characteristic throughput or feed water volume flow of the respective inlet valve in the nominal pressure range, it may be particularly expedient to use a plurality of preset time values, which in particular correspond to different feed water quantities, with the aid of the individual flow rate value or characteristic inflow water flow measured in the nominal pressure range or in a corresponding manner to calculate and store in the controller. Different timing values correspond by measuring the actual flow behavior of the respective valve different intake water flow rate actual values. Possibly.
  • a plurality of throughput values of the respective inlet valve are respectively measured beforehand for different operating points, ie pressures in the nominal pressure range of the respective external water supply, ie, a plurality of individual throughflow water flows are determined in advance. Then, in particular, a mean throughput value can be formed in the nominal pressure range for the respective inlet valve and used for the definition of different time specification values which correspond to specific inflow water quantities.
  • one or more throughput values or feed water flows can also be determined beforehand for pressures above and / or below the nominal pressure range, which represent the actual throughput behavior of the respective inlet valve in these edge regions above and below the nominal pressure range.
  • the respective characteristic feed water flow or throughput is expediently deposited in the control device of the dishwasher.
  • the functional relationship of a plurality of determined Zulaufwassetstrom - or inlet water flow rates of the respective valve also be represented by a mathematical relationship such as by a mathematical function or by a table.
  • one or more timeout values can be determined for these one or more throughput values which result for the desired inflow water quantities which are to actually reach the dishwasher as actual feed quantities from the respective quotient formation of respectively desired feed quantity and respective throughput value.
  • the one or more determined throughput values and / or the timeout values resulting therefrom at different desired feed water quantities are advantageously used during operation of the respective dishwasher as control parameters for supply control of the actual amount of liquid actually entering through the inlet valve.
  • the actual amount of feed water actually entering the dishwasher can be metered, ie supplied in a controlled manner in a defined manner.
  • a specific Zulaufigange which actually flows through the inlet valve in dependence on the flow rate characteristic in the dishwasher, assigned in a defined manner.
  • this pre-measurement of the inlet valve and the associated derivation and storage of one or more control parameters can also be used for one or more other components of the water inlet device or for the entire water inlet device. In the latter case, therefore, the real throughput behavior of the entire water inlet device to be installed in the respective dishwasher is determined and taken into account by one or more control parameters as indicated above for the inlet valve.
  • FIG. 5 shows an initial phase of a wash cycle SG one in the FIGS. 1 and 2 Dishwasher shown 1, which is modified to compensate for a low pressure p of the device external water supply device WH.
  • a low pressure p of the device external water supply device WH Here are off Space reasons, only the pre-wash VG, a part of the cleaning cycle RG and a part of the embedded therein Regeneriervorgangs RV shown.
  • the dishwasher 1 can be configured such that, in addition to the respective feed sequence Z 1 , Z 2 , Z 3 , an optionally activatable additional feed sequence ZZ 1 , ZZ 2 , ZZ 3 can also be carried out automatically for receiving an intended amount of feed water ZW.
  • the additional inlet sequences ZZ 1 , ZZ 2 , ZZ 3 the inlet valve 17 of the water inlet device 13 is additionally opened by the control device 2 for a duration corresponding to an additional time value ZZV 1 , ZZV 2 , ZZV 3 duration.
  • the activation of the additional feed sequences ZZ 1 , ZZ 2 , ZZ 3 is provided when the pressure p of the external water supply device WH is below a predetermined minimum pressure.
  • the minimum pressure can be adjusted to the in FIG. 3
  • the minimum pressure may be set to be equal to or slightly higher than the lower limit GD U of the nominal pressure range NB at the inlet water ZW also below the nominal pressure range NB and possibly in a lower region of the nominal pressure range NB in which the flow characteristic K, K ', K "drops below the characteristic inlet water flow QC, QC', QC" on the other hand, operated above the minimum pressure GD U , the proposed additional supply sequences ZZ 1 , ZZ 2 , ZZ 3 remain disabled, so that there are no adverse changes in consumption under standard conditions.
  • the planned additional time specifications ZZV 1 , ZZV 2 , ZZV 3 can be chosen so that a too low absorption is prevented even under the most unfavorable conditions.
  • the pipe breaks used in dishwashing machines 1 are usually used as backflow preventers 19 in the region of the water feed device 19 at a lower pressure p have an increasing proportion of leakage water LW, which then, for example, in the maintenance of the ion exchanger 38 is not available.
  • the additional time specification value ZZV 1 , ZZV 2 , ZZV 3 can be stored as a fixed value in the control device 2 or determined by the controller 2 according to an algorithm, for example, provided for recording amount of supply water ZW and / or the actual or expected pressure p Water supply device WH taken into account.
  • the activation or deactivation of the additional feed sequences ZZ 1 , ZZ 2 , ZZ 3 can be done manually via the operating device 3, since the operator of the pressure p of the inlet water ZW supplying water supply device WH is known in the rule. As a result, a simple construction of the dishwasher 1 is possible. Alternatively or additionally, the dishwasher 1 can be designed for the automatic activation of the additional feed sequences ZZ 1 , ZZ 2 , ZZ 3 , which can increase the ease of use and avoid operating errors.
  • FIG. 5 now shows a curve Z17 the time course of the operating state of the inlet valve 17 of the dishwasher 1, wherein the value "1" represents an open and the value "0" a closed inlet valve 17.
  • Due to a below the minimum pressure GD U pressure p of the water supply device WH is during the intended to cover the amount of water required by the pre-wash VG inlet sequence Z 1 less inlet water ZW recorded than intended.
  • This is at least partially compensated for by the time-controlled execution of an additional feed sequence ZZ 1 , in which further feed water ZW is received.
  • the supply sequence Z 1 passes directly into the additional feed sequence ZZ 1 , without the feed valve 17 is closed in the meantime. In this way, the intake of feed water ZW can be carried out particularly quickly. In principle, however, it would also be possible to carry out feed sequence Z 1 and additional feed sequence ZZ 1 at different times.
  • FIG. 5 That provided for covering the water needs of the cleaning cycle RG inlet sequence Z 2 an additional inlet sequence ZZ 2 and intended to cover the amount of water requirement of the recovery operation RV inlet sequence Z 2 is a supplementary feed sequence ZZ 2 assigned. It goes without saying that the feed sequence Z 4 of the purging DV, the feed sequence Z 5 of the intermediate rinse ZG and the feed sequence Z 6 of the rinse cycle KG, which in FIG. 4 are shown, each one additional feed sequence can be assigned.
  • FIG. 6 illustrates an example of an automatic activation of the additional feed sequences in a wash cycle SG of the dishwasher of FIGS. 1 and 2 Assuming that the pressure p of the external water supply WH is below the intended minimum pressure GD U. Shown here is the sequence of the feed sequence Z 1 and the additional feed sequence ZZ 1 of the pre-wash cycle VG over time. As already on hand of the FIGS. 4 and 5 explained, the inlet valve 17 is opened during the additional feed sequence ZZ 1 , so that there is a recording of feed water ZW.
  • a curve AM shows, as a function of the time t, an actually recorded quantity AM of inlet water ZW.
  • a dotted curve AMM is shown, which represents the quantity of intake water ZW taken up over time, which would be absorbed if the pressure p of the water supply device WH were above the minimum pressure GD U in the intended nominal pressure range NB.
  • the actually received amount AM of feed water ZW at the end of the feed sequence Z 1 is significantly lower the intended amount of water supplied VM ZW when the pressure p of the external water supply WH under the intended minimum pressure GD is U ..
  • the circulating pump 25 of the dishwasher 1 is assigned a sensor 28 for detecting the electrical power consumption PL.
  • the circulation pump 25 is in FIG. 6 during the feed sequence Z 1 is turned on, wherein the actual power consumption, as shown by the solid load curve PT, with increasing actually recorded amount AM of inlet water ZW - here in particular approximately straight - also increases.
  • a dotted nominal load curve PM is shown, which shows the power consumption PL of the circulation pump 25, which result in the case of a pressure p of the water supply device WH would be above the minimum pressure GD U in the intended nominal pressure range NB.
  • the one or more load values of the pump which are measured or determined at the one or more measuring times of the one or more measurements, such as M a , M b , at these measuring times below, especially with a predetermined reduction factor below the load values of the nominal load curve PM, this indicates the presence of a low pressure range for the water feed device.
  • the presence of an overpressure range above the nominal pressure range can also be detected if the one or more determined load values on an actual load curve above the nominal load curve PM would be at a predetermined minimum load interval or minimum load difference.
  • An exemplary actual load curve above the nominal load curve PM is in the FIG. 6 have been omitted for the sake of clarity of drawing.
  • the determination of the presence of a low-pressure region or overpressure region can also take place with the aid of a filling process which is carried out in portions or in pieces by means of a multiplicity of partial filling steps with the filling of partial fill quantities of feed water.
  • the inlet valve is expediently opened and closed alternately.
  • the first measurement Ma takes place here in the embodiment of FIG. 6 the first measurement Ma at the end of a partial feed sequence TZ a for receiving a subset TM a of the total amount VM of feed water ZW provided for the feed sequence Z 1 .
  • distortions of the measurement M a which can be based on that too Beginning of the feed sequence Z 1 residual water from a previous feed sequence in the circulation pump 25 is located, at least reduced.
  • the feed sequence Z 1 comprises a plurality of successive partial feed sequences TZ a , TZ b for receiving a subset TM a , TM b of the feed sequence Z 1 total provided amount VM of feed water ZW, the measurements M a , M b respectively at the end of one of Partial feed sequences TZ a , TZ b done. Because of this, the change of the power consumption PL from a partial feed sequence TZ a to another partial feed sequence TZ b can be compared and, for example, the slope of the curve PT can be evaluated so that the evaluation is independent of the absolute values of the power consumption PL. If the determined slope of the curve PT is smaller than the slope of the nominal load curve PM, or in particular smaller than a predetermined gradient threshold value, this indicates the presence of a low-pressure region of the external water supply device.
  • the partial feed sequences TZ a , TZ b , at the end of each of the measurements M a , M b takes place, here in the embodiment for receiving equal subsets TM a , TM b of the total supply sequence Z 1 provided target amount of feed water ZW designed.
  • the evaluation of the plurality of measurements M a , M b simplifies.
  • the subsets TM A TM can b is less than 20%, preferably less than 15% and particularly preferably less than 10% of the total provided for the feed sequence Z 1 mass VM of Be feedwater ZW.
  • Measurements M a , M b take place at times at which the uptake of not more than 50%, preferably not more than 40% and particularly preferably not more than 30%, of the total amount VM of feed water ZW provided for the feed sequence Z 1 is provided.
  • particularly meaningful measurements M a , M b are possible, since in general the influence of disturbances in the course of the feed sequence Z 1 increases.
  • an increasing proportion of rinsing liquid S for the circulation cycle is lost due to rinsing liquid adhering to the items to be washed, so that the power PL of the circulating pump 25 drops below a value which can be observed without this effect would.
  • increasing pollution can lead to a further influence on the power consumption P.
  • the evaluation of the measurements M a , M b thus carried out can be carried out by the control device 2 of the dishwasher 1.
  • the control device 2 can then activate the additional feed sequence ZZ 1 when the minimum pressure GD U is undershot, in order to take up still missing feed water ZW, so that the end of the additional feed sequence ZZ 1 .
  • the intended amount of VM is ideally achieved.
  • the activation of a respective associated feed sequence ZZ 2 , ZZ 3 , ZZ 4 ZZ 5 , ZZ 6 also be done automatically by the controller 2.
  • the activation can then take place on the basis of the measurements M a , M b , since during the execution of the rinse cycle SG the pressure p remains in many cases approximately constant.
  • further measurements can be carried out during the further feed sequences Z 2 , Z 3 , Z 4 Z 5 , Z 6 , which can form the basis of the activation of the further additional feed sequences ZZ 2 , ZZ 3 , ZZ 4 ZZ 5 , ZZ 6 .
  • a compensation of the filling tolerance in a filling system or a water inlet device without impeller counter may be appropriate.
  • Inlet valves / Aquastop valves of the water inlet device manufacturing tolerances of, for example, +/- 10% with respect to the flow rate.
  • the specific flow rate of each inlet valve / aquastop valve and / or one or more other components of the water inlet device or the entire water inlet device is preferably e.g. determined via Coriolis mass flowmeter.
  • This measured value can be stored. It can be provided to transmit this determined specific flow rate (in the nominal range) preferably "online”, ie immediately after measurement to a memory location of the control device (in particular the so-called power module) of the dishwasher. This can in particular be programmed into a memory location of the memory unit of the control device.
  • This storage space can be set in advance to the target value 2.5 l / min and after programming contain the actual actual value of the specific flow rate of the water inlet device, in particular its inlet valve.
  • the internal resistance (resistance to the free flow path) of the inlet system (water inlet or heat exchanger) is taken into account, so that the setting is device-specific (in the permissible nominal range) is very accurate and large tolerances, in particular of the inlet valve and / or other components of the respective water inlet device can be allowed.
  • a hardness table can be stored which determines the regeneration intervals in accordance with the set water hardness.
  • a compensation for low-pressure areas of the external water supply device may optionally be expedient by extending the activation time.
  • an option function can be realized.
  • an option key can influence the amount of regeneration - if e.g. the user is aware that the external water supply device is operated in the Niederduck Scheme- by the driving time of the inlet valve of the water inlet device and the regeneration valve of the water softening system is increased.
  • an alternative variant may be expedient in which an automatic determination of the present pressure range via a load detection on the circulation pump.
  • a load detection on the circulation pump Preferably, with the aid of a so-called BLDC circulating pump, it can be recognized whether and how much water is present in the dishwashing machine.
  • the specific household pressure and the associated volume flow can be determined via the load evaluation of the pump. This can be used to compensate for the critical effects of low pressure.

Landscapes

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

Claims (8)

  1. Lave-vaisselle comprenant un dispositif de commande (2) destiné à réaliser au moins un cycle de lavage (SG) pour le nettoyage de produits à laver, et comprenant un dispositif d'arrivée d'eau (13) qui peut être raccordé à un dispositif externe d'alimentation en eau (WH) pour la prise d'eau d'admission (ZW), le dispositif d'arrivée d'eau (13) présentant une soupape d'arrivée (17) pouvant être ouverte et fermée par le dispositif de commande (2) ainsi qu'un dispositif automatique de réglage de débit (18) pour le réglage, largement indépendant de la pression (p) du dispositif externe d'alimentation en eau (WH), d'un flux d'arrivée d'eau (Q) se réglant, lorsque la soupape d'arrivée (17) est ouverte, dans une plage de pression nominale (NB) du dispositif de réglage de débit (18), caractérisé en ce que le cycle de lavage (SG) comprend au moins une séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), à commande temporelle, pour la prise d'une quantité (VM) prédéfinie d'eau d'admission (ZW), lors de laquelle la soupape d'arrivée (17) est ouverte par le dispositif de commande (2) pour une durée correspondant à une valeur de temps défini (ZV1, ZV2, ZV3, ZV4, ZV5, ZV6), une séquence d'arrivée supplémentaire (ZZ, ZZ2, ZZ3) optionnellement activable, attribuée à la séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), lors de laquelle la soupape d'arrivée (17) est ouverte par le dispositif de commande (2) pour une durée correspondant à une valeur supplémentaire de temps défini (ZZV1, ZZV2, ZZV3), pouvant être activée lorsque la pression (p) du dispositif externe d'alimentation en eau (WH) est située en dessous d'une pression minimale (GDU) prédéfinie, la pression minimale (GDU) étant fixée de manière à correspondre à la limite inférieure de la plage de pression nominale (NB), et le dispositif de commande (2) étant réalisé pour identifier un dépassement négatif de la pression minimale (GDU) par évaluation d'au moins une mesure (Ma, Mb) d'un capteur (28), effectuée pendant l'une des séquences d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), et pour l'activation automatique de la séquence d'arrivée supplémentaire (ZZ, ZZ2, ZZ3) lorsqu'un dépassement négatif est identifié.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce qu'un dispositif de commande (3) est ménagé, lequel permet une activation manuelle de la séquence d'arrivée supplémentaire (ZZ, ZZ2, ZZ3,) par un opérateur.
  3. Lave-vaisselle selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le capteur (28) est réalisé pour la détection d'au moins un paramètre de fonctionnement (P) d'une pompe (25, 31), notamment d'une pompe de circulation (25) ou d'une pompe de liquide de lavage (31), à laquelle l'eau d'admission (ZW) est amenée lors de la séquence d'arrivée respective (Z1, Z2, Z3, Z4, Z5, Z6).
  4. Lave-vaisselle selon la revendication 3, caractérisé en ce que le paramètre de fonctionnement (P) représente la consommation électrique (P) de la pompe (25, 31).
  5. Lave-vaisselle selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'identification d'un dépassement négatif de la pression minimale (GDU) est effectuée par évaluation de plusieurs mesures (Ma, Mb).
  6. Lave-vaisselle selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la première mesure (Ma) est effectuée à la fin d'une séquence partielle d'arrivée (TZa, TZb) pour la prise d'une quantité partielle (TMa, TMb) de la quantité (VM) d'eau d'admission (ZW), ménagée au total pour la séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6).
  7. Lave-vaisselle selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6) comprend plusieurs séquences partielles d'arrivée (TZa, TZb) successives pour la prise d'une quantité partielle (TMa, TMb) de la quantité (VM) d'eau d'admission (ZW), ménagée au total pour la séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), les mesures (Ma, Mb) étant respectivement effectuées à la fin de l'une des séquences partielles d'arrivée (TZa, TZb).
  8. Procédé destiné à réaliser au moins un cycle de lavage (SG) pour le nettoyage de produits à nettoyer au moyen d'un dispositif de commande (2) d'un lave-vaisselle (1), notamment d'un lave-vaisselle (1) selon l'une quelconque des revendications précédentes, lequel comprend un dispositif d'arrivée d'eau (13) qui peut être raccordé à un dispositif externe d'alimentation en eau (WH) pour la prise d'eau d'admission (ZW), le dispositif d'arrivée d'eau (13) présentant une soupape d'arrivée (17) pouvant être ouverte et fermée par le dispositif de commande (2) et un dispositif automatique de réglage de débit (18) pour le réglage, largement indépendant de la pression (p) du dispositif externe d'alimentation en eau (WH), d'un flux d'arrivée d'eau (Q) se réglant, lorsque la soupape d'arrivée (17) est ouverte, dans une plage de pression nominale (NB) du dispositif de réglage de débit (18), caractérisé en ce que lors du cycle de lavage (SG), au moins une séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), à commande temporelle, est réalisée pour la prise d'une quantité (VM) prédéfinie d'eau d'admission (ZW), lors de laquelle la soupape d'arrivée (17) est ouverte par le dispositif de commande (2) pour une durée correspondant à une valeur de temps défini (ZV), une séquence d'arrivée supplémentaire (ZZ, ZZ2, ZZ3), à commande temporelle, optionnellement activable, attribuée à la séquence d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), lors de laquelle la soupape d'arrivée (17) est ouverte par le dispositif de commande (2) pour une durée correspondant à une valeur supplémentaire de temps défini (ZZV1, ZZV2, ZZV3), étant activée lorsque la pression (p) du dispositif externe d'alimentation en eau (WH) est située en dessous d'une pression minimale (GDu) prédéfinie, la pression minimale (GDu) étant fixée de manière à correspondre à la limite inférieure de la plage de pression nominale (NB), et le dispositif de commande (2) étant réalisé pour identifier un dépassement négatif de la pression minimale (GDu) par évaluation d'au moins une mesure (Ma, Mb) d'un capteur (28), effectuée pendant l'une des séquences d'arrivée (Z1, Z2, Z3, Z4, Z5, Z6), et pour l'activation automatique de la séquence d'arrivée supplémentaire (ZZ, ZZ2, ZZ3) lorsqu'un dépassement négatif est identifié.
EP11158940.4A 2010-04-14 2011-03-21 Lave-vaisselle doté d'un dispositif d'amenée d'eau Not-in-force EP2377448B1 (fr)

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DE102010027753A DE102010027753A1 (de) 2010-04-14 2010-04-14 Geschirrspülmaschine mit einer Wasserzulaufeinrichtung

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DE102011115244A1 (de) * 2011-09-28 2013-03-28 Airbus Operations Gmbh Verfahren und System zur Überwachung des Betriebszustands einer Pumpe
CN108983652A (zh) * 2017-06-05 2018-12-11 广州医科大学附属第二医院 一种清洗控制装置及方法
IT202100003671A1 (it) * 2021-02-17 2022-08-17 Bitron Spa Metodo di controllo di un sistema di carico e di trattamento dell’acqua di un elettrodomestico, relativo sistema di trattamento dell’acqua e macchina lavastoviglie.
CN114272670B (zh) * 2021-12-27 2023-01-20 珠海格力电器股份有限公司 净水设备及其控制方法

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DE3839203A1 (de) * 1988-11-19 1990-05-23 Licentia Gmbh Programmgesteuerte haushaltwaschmaschine mit wasserenthaertungseinrichtung
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IT1310883B1 (it) * 1999-07-30 2002-02-22 Ranco Inc Procedimento di produzione di dispositivi di controllo dellivello o del volume dell'acqua per macchine elettrodomestiche
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DE102010027753A1 (de) 2011-10-20
EP2377448A3 (fr) 2017-08-09
EP2377448A2 (fr) 2011-10-19

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