DE102010027753A1 - Dishwasher with a water inlet - Google Patents

Abstract

In the case of a dishwasher, in particular a domestic dishwasher (1), with a control device (2) for carrying out at least one wash cycle (SG) for cleaning items to be washed and with a water supply device (13), which for receiving supply water (ZW) is connected to an external water supply device ( WH) can be connected, the water supply device (13) having an inlet valve (17) that can be opened and closed by the control device (2) and an automatic flow setting device (18) for setting a pressure that is largely independent of the pressure (p) of the external water supply device (WH) with the inlet valve (17) open in a nominal pressure range (NB) of the flow setting device (18) adjusting the inlet water flow (Q), the rinse cycle (SG) comprises at least one time-controlled inlet sequence (Z1, Z2, Z3, Z4, Z5, Z6) for receiving a predetermined amount of inlet water (ZW), at which the inlet valve (17) by the Steuerein direction (2) is open for a duration corresponding to a time preset value (ZV1, ZV2, ZV3, ZV4, ZV5, ZV6), the time preset value (ZV1, ZV2, ZV3, ZV4, ZV5, ZV6) taking into account a previously in the nominal pressure range ( NB) the characteristic inlet water flow (QC) of the water inlet device (13) measured by an external measuring device is determined, and / or wherein an optionally activatable additional inlet sequence (ZZ1, ZZ2, ZZ3) assigned to the inlet sequence (Z1, Z2, Z3, Z4, Z5, Z6) ), in which the inlet valve (17) is open by the control device (2) for a duration corresponding to an additional time preset value (ZZV1, ZZV2, ZZV3), can be activated when the pressure (p) of the external water supply device (WH) is below a predetermined minimum pressure (GDU) lies.

Description

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.

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 object is achieved in a dishwasher of the type mentioned above in that 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, where at the time set value below Considering a measured in the nominal pressure range by means of an external measuring device characteristic Zulaufwasserstroms the water inlet device is 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. For this purpose, the control device can be designed as so-called sequence control, in particular as electronic sequence control.

Here, the water inlet device is designed so that it is connected to an external, d. H. outside the dishwasher existing, water supply device, in particular with a building side installed water supply device such. As drinking water pipe, can be connected, so that the required to carry out rinsing feed water can be added. In this case, 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.

Furthermore, the water inlet device comprises a flow adjustment device which is provided to influence the feed water flow resulting from the open inlet valve, ie the amount of feed water per unit time, at least in a nominal pressure range such that the feed flow is independent of the pressure of the external water supply device. In this case, 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.

During the execution of a rinse, it is, as a rule several times, necessary to receive from an external water supply device a predetermined amount of feed water in the dishwasher for one or more liquid-conducting Teilspülgänge. The respective amount is given on the basis of purging technology considerations and in particular on the basis of empirical values. To receive such a predetermined amount of feed water, a time-controlled feed sequence is now provided by the control device, in which the supply valve is opened for a duration corresponding to a time value.

According to an advantageous embodiment, 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. Possibly. However, according to an alternative embodiment variant, it may also be expedient if 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. The term feed sequence thus includes, inter alia In particular, both such a continuous feed operation and such a stepwise divided or discrete feed operation.

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. By using a corresponding time specification value, therefore, the intended amount of feed water can be absorbed without the need for a sensor to determine the amount of feed water actually received.

It is provided to determine the time value in consideration of a measured in advance in the nominal pressure range by means of an external measuring device characteristic Zulaufwasserstroms the water inlet device. 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. Of course, a repetition of the measurement in the context of maintenance, for example, in a malfunction occurring or after replacement of components of the water inlet device, be useful. The measurement can be carried out for example with a Coriolis mass flowmeter (CMD), which is based on the Coriolis principle and has a particularly high accuracy By measuring the characteristic Zulaufwasserstroms the relationship between opening time and recorded amount of feed water in an individual, d. H. respectively predetermined water inlet device can be detected with high accuracy. On the basis of this relationship, 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 during the execution of the feed sequence. 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. For example, it is thus possible to dispense with an impeller meter frequently used in the area of the water feed device in the case of conventional dishwashers, without any restrictions with regard to compliance with the quantity of feed water to be absorbed. It is also not necessary to provide a concentricity monitoring device with which the respective feed sequence could be controlled. It is possible in particular by the compensation according to the invention, alone by at least one time-controlled feed sequence, d. H. by "time filling", so opening the water inlet device for a certain period of time, a running in this correlate with this opening time duration nominal feed water filling amount in the dishwasher actually run as an actual feed water filling.

In this case, 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. By compensating for such deviations, it is now possible to use 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. Likewise, in many cases during the manufacture of the dishwasher, a complex checking of the components with regard to the observance of predetermined tolerance ranges as well as a sorting out of those components which do not comply with the tolerance ranges can be dispensed with. This leads to a more cost-effective production of the dishwasher, especially in the case of automatic mechanical flow adjustment devices, which in principle have larger scattering regions.

Furthermore, it can be achieved in particular by the exact metering of the amount of feed water received in a feed sequence that an intended cleaning and / or drying effect is achieved independently of series variations of the water feed device. It can in many cases each for recording provided amount of feed water can be reduced because safety margins can be reduced or eliminated in the amount to be absorbed. In this way, the water consumption of the dishwasher can be improved.

In addition, due to the exact compliance with the quantity of feed water to be received in the context of an intake sequence, it can be ensured in an advantageous manner that the water consumption of the dishwashers of a series is largely constant. In this way, it can be ensured, in particular, that the water consumption stated in the accompanying documents of the dishwashers is complied with. In many cases, the consumption information can even be corrected downwards.

According to an advantageous development of the invention, 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. In this way, by depositing or storing only one value, it is possible to achieve that all time specification values of the feed sequences carried out during a wash cycle are adapted to the individual properties of the water feed device of the respective dishwasher. In particular, 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. In this case, the control device can be designed to calculate the time specification value by means of the formula: time specification value = predetermined quantity / characteristic feed stream. Alternatively, the determination of the timing value may be made on the basis of value tables or the like stored in the controller.

According to an advantageous embodiment of the invention, the time value can be stored in advance in the control device. In this case, 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. For different amounts of feed water, 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.

According to an advantageous development of the invention, 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. In this way, 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. In addition, as transmission errors can be avoided, which are avoided in a manual input of the characteristic Zulaufwasserstroms and / or the timeout value determined therefrom.

According to an advantageous development of the invention, 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.

According to an expedient development of the invention, 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. As a result, deviations of the amount of intake water actually received during an intake sequence, which are based on a non-ideal flow characteristic of the flow adjustment device, can be minimized. Thus, 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.

According to an expedient development of the invention, 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. For example, 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.

According to an advantageous embodiment of the invention, the influencing of the flow-through of the feed water flow cross-section is effected by an elastic deformation of the throttle body. In this way, results in a particularly simple trained flow adjustment. By way of example, 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.

According to an expedient development of the invention, 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 dishwasher comprises in particular at least one pre-rinsing 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 the items to be washed and / or for preparing a drying step , and / or at least one drying cycle for drying the items to be washed. Rinse cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-conducting partial rinses, since during their implementation, the introduced into the rinsing chamber items to be treated with a rinsing liquid. During the drying cycle, a use of rinsing liquid is usually not provided. By now a predetermined amount of feed water is added to form the rinsing liquid by means of a timed feed sequence of the type described here, it can be ensured that exactly the amount of rinsing liquid is formed, which is necessary to achieve the purpose of each water-carrying Teilspülgangs. An insufficient washing result can be avoided as well as an excessive water consumption.

According to an expedient development of the invention, a softening device with an ion exchanger is provided, 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 wherein at least one of the timed Supply sequences for receiving a predetermined amount of feed water for the regeneration process and / or the flushing process is provided. As is known, 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. It can therefore be provided that the feed water received with the water feed device is first led over a softening device for softening or decarbonating water before it is used for a rinsing or rinsing process. The softening device may comprise an ion exchanger for softening and / or desalting water and a maintenance device for servicing the ion exchanger.

In particular, 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. In order to relieve the resin of the ion exchanger of the sorbed lime, 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. During the regeneration 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. As soon as this regenerating brine comes into contact with the resin of the ion exchanger, the sodium ions contained in the regenerating brine are sorbed by the resin instead of the calcium ions or magnesium ions, while the calcium ions or magnesium ions from the resin dissolve in the regenerating brine.

The regenerating brine is usually prepared in a Regeneriersoleeinrichtung 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. In this case, the amount of intake water taken in just corresponds to the amount of regeneration brine pressed into the ion exchanger. By means of the high-accuracy water supply device can thus be ensured in an advantageous manner that exactly the amount of regenerating brine is forced into the ion exchanger, which is required for its regeneration. An insufficient regeneration can be avoided as well as an excessive water and / or Regeneriermittelverbrauch.

After expiration of a time required for the regeneration of the ion exchanger, the ion exchanger is received by the water inlet device according to an advantageous development Inlet water flushed through in a purging, so as to dissipate the regenerating brine from the ion exchanger, so that the ion exchanger is available again for the initial hardening of water. By means of working with high accuracy water inlet device can be advantageously achieved that exactly that amount of feed water is used for the flushing, which is required for flushing. Thus, an insufficient flushing can be avoided as well as excessive water consumption.

According to an expedient development of the invention, 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 Teilspülgang. From the thus determined total amount and 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.

According to an advantageous embodiment of the invention, which also represents an independent aspect of the invention, it is provided in a dishwasher of the type mentioned that the rinse comprises at least one time-controlled feed sequence for receiving a predetermined amount of feed water, wherein the inlet valve by the control device for a duration corresponding to a time value is opened, wherein an optionally activatable additional feed sequence assigned to the feed sequence, in which the feed valve is opened by the control device for a duration corresponding to an additional fuel cell preset value, can be activated if the pressure of the external water supply device is below a predetermined minimum pressure. By activating the additional feed sequence, it is possible to avoid taking up too small an amount of feed water if the pressure of the external water supply device is too low, which could lead to a poor rinsing and / or drying result. In this case, a poor maintenance of the ion exchanger of the softening device can be prevented. 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. For example, the minimum pressure may be 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.

Since 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 preselected value can be selected so that too low a pickup is prevented even under the most unfavorable conditions. It can be taken into account that the pipe interrupters usually used as backflow preventers in the area of the water feed device have an increasing proportion of leakage water at a lower pressure, which then for example during the maintenance of the ion exchanger is not available. The additional time specification value can be stored as a fixed value in the control device or can be determined by the control device according to an algorithm that takes into account, for example, the amount of intake water intended for intake and / or the actual or expected pressure of the water supply device.

According to an advantageous embodiment of the invention, an operating device is provided which allows manual activation of the additional feed sequence by an operator. As a result, a simple construction of the dishwasher is possible. In the control device may be a provided for general operation of the dishwasher by the user control device such. B. a control key or option key act, which, for example, primarily selecting and starting a wash program to perform a rinse cycle. Also, a dedicated operating device, in particular additional key, be provided for manual activation of the additional feed sequence by an operator. Likewise, 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.

According to an advantageous development of the invention, the control device is designed to detect an undershooting of the minimum pressure by evaluating at least one measurement performed during one of the feed sequences of a sensor and to automatically activate the additional feed sequence in the event of a detected undershoot. In this way, a false activation or wrong deactivation of the additional feed sequence due to operating errors, pressure fluctuations of the external water supply device, etc. can be avoided. 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. As a result, an automation of the activation or deactivation of the additional feed sequence can be realized with little measurement effort. However, it is also possible to activate the additional feed sequence when the minimum pressure is not reached initially only for the first feed sequence and to repeat the measurement in a further feed sequence of the wash cycle and to make the activation of the additional feed sequence in the further feed sequence dependent on the repeated measurement. In this way, a demand-based intake of feed water can be achieved especially with stronger pressure fluctuations.

According to an expedient development of the invention, the control device is designed to automatically determine the additional time specification value taking into account the measurement. In this way, the duration of the additional feed sequence can be adapted to the actual pressure of the external water supply device. In this case, 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.

According to an advantageous embodiment of the invention, 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. In this case, operating parameters of the respective pump change u. 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. According to an expedient development, the operating parameter represents the electrical power consumption of the pump. Usually, the pumps of dishwashers with electric motors, such as brushless DC motors (BLDC motor), driven. Especially 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. In addition, the electrical power can be relatively easily, for example by a current measurement, detected. In many cases, the pump of a dishwasher is already assigned a sensor for detecting its power consumption, for example in order to adjust the flow rate, so that the minimum pressure can be carried out with extensive use of already existing components. In many cases, only the control device itself, z. By software customization.

According to an advantageous development of the invention, the detection of an undershooting of the minimum pressure takes place by evaluating a plurality of measurements. In this way, the informative value of the evaluation can be improved, so that the additional feed sequence is only activated, if this is necessary. In particular, 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.

According to an expedient development of the invention, 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. In this way, 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.

According to an expedient development of the invention, 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. In this way, the change of the operating parameter from one partial feed sequence to another partial feed sequence can be compared so that the evaluation is independent of the absolute values of the operating parameter. As a result, the monitoring of the minimum pressure can be further improved.

According to an advantageous development of the invention, the partial intake sequences, at the end of which one of the measurements takes place, are designed to accommodate equal amounts of subsets of the total amount of intake water intended for the intake sequence. This simplifies the evaluation of the large number of measurements. According to an expedient development of the invention, 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.

According to an advantageous development of the invention, 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. As a result, particularly meaningful measurements are possible, since in general 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 reproduced in the dependent claims and / or above advantageous embodiments of the dishwasher according to the invention may be provided individually or in any combination with each other in the dishwasher according to the invention.

Furthermore, 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 during the rinse, in which the feed valve is opened by the control device for a duration corresponding to a time value, the time set value taking into account a characteristic measured beforehand in the nominal pressure range by means of an external measuring device Incoming water flow of the water inlet device is determined, and / or wherein the feed sequence associated optionally activatable time-controlled additional feed sequence, in which the inlet valve is opened by the controller for a Zusatzzeitvorgabewert 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.

Other advantageous embodiments and / or developments of the invention are given in the dependent claims.

The above advantageous embodiments and / or developments of the invention and / or reproduced in the dependent claims advantageous embodiments and / or developments of the invention may be provided individually or in any combination with each other.

The invention and its developments and their advantages are explained in more detail with reference to figures. Show it:

1 an advantageous embodiment of a domestic dishwasher according to the invention in a schematic side view,

2 a block diagram of the household dishwasher of 1 .

3 a family of flow characteristics of identical water supply devices of household dishwashers according to the 1 and 2 .

4 exemplary courses of rinses of household dishwashers according to the 1 and 2 .

5 an initial part of the course of an exemplary wash cycle of a household dishwasher according to the 1 and 2 when the pressure drops below a minimum pressure of the external water supply device, and

6 a feed sequence followed by additional feed sequence of the rinse the 5 ,

In the following figures, corresponding parts are provided with the same reference numerals. In this case, only those components of a dishwasher are provided with reference numerals and explained, which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.

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. Expediently, a plurality of washing programs are stored, so that by selecting a suitable washing program, the sequence of a by the control device 2 controlled rinse, for example, to the load, to the type of load, to the degree of contamination of the items and / or to the desired duration of the rinse can be adjusted.

The control device 2 is an operating device 3 associated with which it is an operator of the dishwasher 1 allows you to call up one of the wash programs and thereby start. Furthermore, the control device 2 an output device 4 assigned, which allows the output of messages to the operator. The output device 4 For example, it may include indicator lights, light-emitting diodes, an alpha-numeric display and / or a graphic display for outputting optical messages. Furthermore, the output device 4 have a buzzer, a speaker and / or the like for the output of acoustic messages.

The dishwasher 1 further comprises a rinsing container 5 passing through a door 6 is closable, leaving a closed rinsing chamber 7 for rinsing dishes. The washing container 5 may possibly be inside a housing 8th the dishwasher 1 be arranged. For built-in dishwashers is the housing 8th not required and may be omitted altogether at the top. In 1 is the door 6 shown in their closed position. The door 6 is brought by pivoting about an axis perpendicular to the plane arranged in an open position in which it is aligned substantially horizontally and allows the introduction or removal of items to be washed. Im in 1 embodiment shown is the operating device 3 in an easy to use manner on an upper section of the door 6 arranged. The output device 4 is also on the upper section of the door 6 arranged so that optical messages are clearly visible and audible messages are clearly audible. Also the control device 2 is positioned there so that the required signal connections between the operating device 3 , the output device 4 and the controller 2 can be kept short. In principle, however, it is possible to use the operating device 3 , the output device 4 and / or the control device 2 to arrange elsewhere. In particular, the control device 2 according to an alternative embodiment, possibly also in a floor assembly below the washing container 5 be housed. The control device 2 could also be 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 for positioning dishes 9 and a lower crockery basket 10 on. The upper crockery basket 9 is on extension rails 11 arranged, which in each case at opposite, extending in the depth direction of the washing compartment side walls of the washing compartment 5 are attached. The crockery basket 9 is with the door open 6 by means of the extension rails 11 from the washing container 5 extendable, which is the loading or unloading of the upper crockery basket 9 facilitated. The lower crockery basket 10 is analogous to extension rails 12 arranged. He is in the approximately horizontal Open end position of the door on this herausfahrbar, ie the door forms for him a kind of support table.

That or in the control device 2 each stored rinse programs can provide several Teilspülgänge, for example, in this order at least one pre-rinse, at least one cleaning cycle, at least one intermediate rinse, at least one rinse and / or at least one drying cycle. Here, pre-wash cycle, cleaning cycle, intermediate rinse and rinse are referred to as water-carrying partial rinses, as during their implementation in the rinsing chamber 7 positioned items to be washed with a rinsing liquid S is treated. During the drying cycle, a treatment of the items to be washed with rinsing liquid S is generally not provided.

In the exemplary embodiment, fresh water or feed water ZW is used as rinsing liquid S for treating the items to be washed, which is taken from a water supply device WH, in particular a drinking water line outside the dishwasher, which is connected to the public drinking water supply network, and into the rinsing chamber 7 can be filled, ie the dishwasher takes from the dishwasher-external water supply device on fresh water. Typically, 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. But it is also possible to store a rinsing liquid S a Teilspülgangs in a reservoir, not shown, and in one or more later Teilspülgängen again in the rinsing chamber 7 fill.

The dishwasher 1 of the 1 includes a water inlet device 13 which is provided for connection to the external water supply device WH. As in 1 As shown, 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 includes a connector 14 , which is intended for connection to the faucet WH. The connection can be made for example via a threaded arrangement, a bayonet arrangement or the like. Downstream of the connector 14 is a connecting cable, in particular a connecting hose 15 provided, which is preferably flexible. The downstream end of the connection hose 15 is with a housing-fixed connection piece 16 connected.

The downstream side of the housing-fixed connector 16 is with an input side of one by means of the control device 2 switchable inlet valve 17 the water inlet device 13 fluid-conducting connected. The inlet valve 17 can be designed as a switchable solenoid valve, which has only an open position and a closed position. Instead of or in addition to the device-side inlet valve 17 can also be in the area of the fitting 14 an external inlet valve, in particular a so-called aqua-stop valve be provided, preferably by means of the control device 2 switchable, in particular shut-off and openable.

Furthermore, an output side of the inlet valve 17 with a flow adjustment device 18 connected liquid-conducting, which is intended to be in the open inlet valve 17 resulting Zulaufwasserstrom, so the per unit time flowing amount of feed water ZW, at least in a nominal pressure range to influence so that the inlet flow is largely independent of the pressure of the external water supply device WH. The flow adjusting device 18 works automatically, in particular according to a mechanical principle, so that a control by the control device 2 is not required. For example, the flow adjuster 18 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 may 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 is the flow-through cross section of the flow adjustment 18 as a function of the pressure is reduced so that adjusts a quasi-constant supply water flow. Alternatively, 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 input-side inlet valve 17 , in particular Aquastop valve, ie, in the inlet valve 17 be integrated. This may be different from the illustrated embodiment in particular coupled to the faucet WH, in particular screwed, ie it is connected in this advantageous embodiment as an external component directly to the faucet WH.

Downstream of the flow control device 18 is a backflow preventer 19 provided preferably as a pipe interruption 18 is executed and the downstream completion of the water inlet device 13 forms. The backflow preventer 19 serves to suck back liquids from the dishwasher 1 to prevent, if in the external water supply device by dynamic processes, a negative pressure arises. This prevents in particular that already used feed water ZW, which may be offset with dirt, cleaning agents, cleaning aids and / or regenerants, back into the external, especially the building water supply WH. To be in the field of pipe interruption 19 leaking leak water LW controlled to be able to divert is the pipe interruption 19 a leak water drain 20 assigned to the rinsing chamber 7 empties.

An exit side of the pipe break 19 is with an input side of a softening device 21 connected. In this way it is possible that by means of the water inlet device 13 absorbed feedwater ZW to soften before it has one with the output side of the softening device 21 connected water inlet 22 as soft water W into the rinsing chamber 7 arrives.

The over the water inlet 22 in the rinsing chamber 7 reached soft water W can now be used as flushing fluid S. In this case, the rinsing liquid S comes due to their weight in a on a ground 23 of the washing container 5 trained collecting device 24 which may be preferably formed as a collection pot. An input side of a circulation pump 25 is thereby fluid-conducting with the collecting pot 24 connected. Furthermore, an output side of the circulation pump 25 with a spraying device 26 . 27 connected, which makes it possible in the washing chamber 7 to bring introduced items to be washed with rinsing liquid S. In the embodiment of 1 includes the spraying device 26 . 27 an upper rotatable spray arm 26 and a lower rotatable spray arm 27 , However, alternatively or additionally fixed and / or other movable spray elements could be provided.

The when the circulating pump 25 from the sprayer 26 . 27 Exiting rinsing liquid S then passes due to their weight within the rinsing chamber 7 back to the collection pot 24 , To the operation of the circulation pump 25 during the Umwalzens can, the circulation pump 25 a sensor 28 for monitoring at least one operating parameter of the circulation pump 25 be assigned.

In addition, the dishwasher can 1 in a conventional manner, a metering device 29 which allows it into the rinsing chamber 7 introduced rinse liquid S with one or more cleaning agents and / or cleaning aids to improve the cleaning effect and / or the drying effect of a rinse cycle.

Furthermore, in the 1 shown dishwasher 1 a drainage device 30 on, which serves, no longer required rinsing liquid S as wastewater AW from the rinsing chamber 7 pump out to the outside. The drainage device 30 includes a drain pump 31 , whose input side with the collecting pot 24 connected is. The outlet side of the drain pump 31 however, is with a housing-fixed connection 32 the dishwasher 1 connected. To an output of the housing-fixed connection 32 is a sewer, especially a sewer hose 33 attached, which is preferably flexible. At the downstream end of the sewage hose 33 is a connector 34 arranged, which is intended to the drainage device 30 to connect with a sanitation AR. The sanitation device AR can be, for example, a sewer pipe AR of a building-side water installation. The connection between the fitting 34 and the sewer pipe AR may be formed as a screw connection, as a bayonet connection, as a plug connection or the like. Furthermore, the dishwasher 1 a data interface 35 on what information from the controller 2 read and / or in the control device 2 can be entered. In the exemplary embodiment, the data interface 35 at the back of the dishwasher 1 arranged so as to impair the visual appearance of the dishwasher 1 to minimize. But it could also be provided elsewhere.

2 shows a block diagram of the household dishwasher 1 of the 1 , wherein in particular the softening device 21 as well as the control and communication concept are shown in more detail. The softening device 21 includes a switching valve 36 , a regenerant container 37 and an ion exchanger 38 ,

At the changeover valve 36 it may be a water switch, in particular a 3-way valve, act, which has an input and two outputs. The water switch 36 makes it possible, in a first operating position A shown by a solid line through the pipe interruption 19 incoming feed water to the ion exchanger 38 supply. In a shown with a dotted line second operating position B of the water switch 36 On the other hand, this can be done via the pipe interruption 19 incoming feed water to be filled with a regenerating agent RM Regeneriermittelbehälter 37 be supplied. The first operating position A serves to fill the rinsing chamber 7 with soft water W and the second operating position B of the maintenance of the ion exchanger 38 ,

In the embodiment, a signal line is further 39 provided, which 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. Furthermore, a signal line 40 provided, which the control device 2 with the output device 4 connects, so through the control device 2 provided information about the output device 4 can be transmitted and output there to the operator.

Further, a control line 41 provided, which the control device 2 with the switchable inlet valve 17 connects so that the inlet valve 17 by the control device 2 closed or can be opened. In this way, the intake of feed water ZW by the control device 2 to be controlled. Another control line 42 connects the controller 2 with the circulation pump 25 , As a result, the circulation of washing liquid S in the washing chamber is also possible 7 by the control device 2 adjustable, in particular controllable or adjustable.

Furthermore, a signal line 43 provided which the sensor 28 with the control device 2 combines. The signal line 43 allows it from the sensor 28 generated information regarding the running characteristics of the circulation pump 25 to the control device 2 transferred to. In this case, the control device 2 designed so that they are 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 , this information from the sensor 28 can take into account. Further, a control line 44 provided, which the control device 2 with the drain pump 31 connects, so that also the drain pump 31 by the control device 2 switchable, in particular off and on, is. Likewise is a control line 45 provided, which the control device 2 with the water switch 36 connects, so the water switch 36 is also switchable by the control device. A preferably bidirectional data line 46 further allows information transfer between the controller 2 and the data interface 35 ,

While performing a rinse with the dishwasher 1 it is, as a rule several times, required to take a predetermined amount of supply water ZW. The respective quantity is predefined on the basis of rinse-technological considerations, in particular on the basis of empirical values. The inclusion of such a predetermined amount of feed water ZW now takes place with a by the control device 2 timed feed sequence, in which the inlet valve 17 is open for a duration corresponding to a time value. Due to the pressure of the external water supply device WH largely independent adjustment of the feed water flow by 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 time value. By using a corresponding time specification value, therefore, the intended amount of feed water ZW can be recorded without a sensor for determining the actually received amount of feed water ZW is required. The during the opening time of the inlet valve 17 taken amount of feed water ZW corresponds to the product of opening time and the adjusting feed flow or throughput. This in turn depends essentially on the flowability of the water inlet device 13 and in particular of the flowability of the flow adjustment 18 from.

3 shows a family of flow characteristics K, K ', K''identical water supply devices 13 of household dishwashers 1 according to the 1 and 2 , In this case, the pressure p of the feed water ZW supplying water supply device WH and on the ordinate of the adjusting Zulaufwasserstrom or water flow rate Q is shown on the abscissa.

A first exemplary flow characteristic K of a first water supply device 13 runs in a nominal pressure range NB of the flow adjustment device 18 essentially horizontal. This means that the adjusting Zulaufwasserstrom Q in this area is almost independent of the pressure p of the external water supply device WH. Below the nominal pressure range NB, in particular, the working range of the flow rate setting device 18 understood, in which the flow characteristic K in a predetermined tolerance range, for example in a tolerance range of +/- 10%, preferably +/- 5%, more preferably +/- 3%, runs around a mean inlet water flow QM. 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 mentioned nominal pressure ranges NB represent a wide field of application of the dishwasher 1 for sure. In particular, exact intake quantities of feed water ZW can be ensured even with larger pressure fluctuations of the external water supply device WH.

It is typical that the flow characteristic K in a central region MNB of the nominal pressure range NB is such that the feed water flow Q the average Zulaufwasserstrom QM corresponds. On the other hand, below the middle region MNB, 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. Below 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. Conversely, 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.

Further shows 3 a second exemplary flow characteristic K 'another water inlet device 13 for which what has been said above applies analogously. However, the further water inlet device points 13 due to series changes an altered flow characteristic. Thus, 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. Likewise, in 3 a third exemplary flow characteristic K '' a third water inlet device 13 shown, the mean inlet water flow QM '' is well below the mean inlet water flow QM the flow characteristic K. From the above, it is clear that the supply water flow can vary in different dishwashers, even if they are basically identical.

According to the invention, in the nominal pressure range NB by means of an external measuring device, a characteristic inlet water flow QC, QC ', QC''of the respective water inlet device 13 to measure in advance and to take into account the characteristic feed water flow QC, QC ', QC''in the determination of the time value for a feed sequence. In this way, the individual characteristic K, K ', K''of the respective water inlet device 13 are taken into account, so that the provided for receiving amount of feed water ZW can be accurately maintained when carrying out the feed sequence. In this case, the measurement of the characteristic feed water flow QC, QC ', QC "in the middle region MNB of the nominal pressure range NB is preferably carried out, since in this way particularly accurate fill quantities can be realized.

The characteristic feed water flow or water flow rate QC, QC ', QC''corresponds to an actual feed water flow or inlet water throughput of an individual water feed device 13 which, in the case of a connection to a water supply device WH, which supplies feed water ZW in the nominal pressure range NB, when the inlet valve is open 17 established. The respective characteristic feed water flow QC, QC ', QC'', for example, automatically via the data interface 35 or manually via the operating device 3 in the control device 2 be stored. The control device 2 can then calculate the respectively required time setting value, for example by means of the formula "time setting value = predetermined intake quantity / characteristic supply flow" or from one in the control device 2 read out stored value table or the like. Alternatively, the timer value can be determined externally and, for example, automatically via the data interface 35 or manually via the operating device 3 in the control device 2 be stored.

4 shows exemplary time sequences basically similar rinses SG, SG ', SG''identical dishwashers according to the invention 1 of the embodiment on a common time axis t. The differences in the course of the rinses SG, SG ', SG', which are described in greater detail below, are based on the fact that the first rinse cycle SG shown is a dishwasher 1 underlying, whose water inlet device 13 in the 3 shown flow characteristic K that the second illustrated rinse SG 'is a dishwasher 1 underlying, whose water inlet device 13 in the 3 shown flow characteristic K ', and that the third illustrated rinse SG''a dishwasher 1 underlying, whose water inlet device 13 in the 3 shown flow characteristic K '' has. The basic sequence of the rinses SG, SG ', SG''is first explained using the example of the first rinse SG.

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. In this case, a curve Z17 is shown on the time axis t, which shows the operating state of the inlet valve 17 shows. The inlet valve 17 can assume an operating state "0", in which it is closed, and an operating state "1", in which it is open.

In principle, it is provided in the rinse cycle SG that at the beginning of the water-carrying Teilspülgänge VG, ZG, RG, KG each have a feed sequence Z ₁ , Z ₂ , Z ₅ , Z ₆ for receiving the required for the respective Teilspülgang VG, ZG, RG, KG Quantity of inlet water ZW controlled by the controller 2 automatically performed. This is the inlet valve 17 during the Feed sequence Z _{1 of} the pre-wash VG open for a period of time which corresponds to a timing value ZV ₁ . The timing value ZV ₁ is in consideration of the characteristic Zulaufwasserstrom QC, as to the hand 3 has been determined, so that the provided for the pre-wash cycle VG amount of feed water ZW can be recorded with high accuracy, without this would have to be detected by a flow meter. As a result, the water consumption of the dishwasher 1 be optimized.

At least as long as the inlet valve 17 is opened during the feed sequence Z ₁ , the water switch 36 by the control device 2 switched so that they are in the in 2 shown operating position A is located. This allows us to measure the exact amount of feed water ZW through the ion exchanger 38 softened and as soft water W in the washing chamber 7 initiated. There, the soft water W is the rinsing liquid S by means of the control device 2 controlled circulating pump 25 over the spray system 26 . 27 circulated to treat so the dishes. At the end of the pre-wash cycle VG, the rinsing liquid S is also conveyed by the control device 2 controlled drain pump 31 pumped out.

In 4 is the inlet valve 17 during the feed sequence Z ₁ continuously open, so that the duration of the feed sequence Z ₁ just the opening time of the inlet valve 17 equivalent. However, it could be provided in the context of the feed sequence Z ₁ (or another of the illustrated feed sequences Z ₁ , Z ₂ , Z ₃ , Z ₄ Z ₅ , Z ₆ ) a stepwise recording of the feed water ZW, wherein the inlet valve 17 opened several times and closed again. It would be essential, however, that the sum of the individual opening times of the inlet valve 17 corresponds to the timing value ZV ₁ , so that in this case, the intended amount of feed water ZW could be included.

Basically, the described sequence of a water-carrying Teilspülgangs VG also applies to the cleaning cycle RG, the intermediate rinse ZG and the Klarspülgang KG. In this case, at the start of the Zwischenspülgangs ZG a dependent of a timer value ZV ₅ feed sequence Z ₅ and at the beginning of the rinse cycle KG dependent on a timer value ZV ₆ feed sequence Z ₆ performed at the beginning of the cleaning cycle RG being dependent on a timer value ZV ₂ inlet sequence Z ₂ , In the example of 4 The time specification values Z ₁ , Z ₂ , Z ₅ , Z ₆ correspond to one another, since the quantities of feed water ZW to be received in each case also correspond. However, different amounts of feed water ZW and therefore different timing values Z ₁ , Z ₂ , Z ₅ , Z ₆ may also be provided.

Furthermore, the rinse SG includes a maintenance sequence RV, DV for the maintenance of the ion exchanger 38 , The maintenance sequence RV, DV is also by the controller 2 automatically controlled. It can be provided that the maintenance sequence is performed only when the ion exchanger 38 is exhausted, that is, if he has already taken so many hardeners that he can no longer sufficiently soften the additional inlet water ZW to be absorbed.

To determine whether the execution of a maintenance sequence RV, DV is required, the control device 2 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 inlet water ZW, the control device 2 then determine if 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, via the operating device 3 entered and in the control device 2 get saved.

At the in 4 Rinse SG shown was by the controller 2 found that a maintenance sequence RV, DV for servicing the ion exchanger 38 is required. In the exemplary embodiment, 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. However, the maintenance sequence RV, DV could also be integrated in another way in the sequence of Teilspülgänge 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.

At the beginning of the regeneration process RV, an inlet sequence Z ₃ for receiving the amount of feed water ZW required for the regeneration process RV is automatically generated by the control device 2 carried out. This is the inlet valve 17 during the feed sequence Z _{3 of} the regeneration RV open for a period corresponding to a timing value ZV ₃ . The timing value ZV ₃ is also taking into account the characteristic Zulaufwasserstrom QC, as to the hand 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 Teilspülgang VG, RG, ZG, KG, can be recorded with high accuracy.

At the beginning of the regeneration process RV is in the regenerant tank 37 a Regeneriersole formed from previously filled regenerating RM and previously filled Zulaufwasser ZW. During the feed sequence Z _{3 of} the regeneration process RV is the water switch 36 switched to its operating position B, so that the recorded feed water ZW in the regenerant tank 37 enters. As a result, a lot of regenerating brine from the regenerant tank 37 in the ion exchanger 38 pressed, which corresponds to the amount of intake water received ZW. In this way you can put in the ion exchanger 38 For regeneration introduced amount of regenerating brine can be set exactly, ie be dosed in a defined manner. In this way, a saving in feed water ZW and in the regeneration agent RM can be achieved without the fear of insufficient regeneration.

The regenerating brine remains in the ion exchanger until the beginning of the flushing process DV 38 and takes up there attached hardeners, so that the ion exchanger 38 again obtained a capacity for softening of inlet water ZW.

The now in the ion exchanger 38 As a rule, the regenerating brine is not suitable for cleaning the dishes. Therefore, a purging DV is now provided, at the beginning of a feed sequence Z ₄ for receiving the required for the flushing DV amount of feed water ZW automatically by the controller 2 is carried out. During the flushing process DV is the water switch 36 switched back to their operating position A, so that the intake water ZW recorded in the ion exchanger 38 rinsing out the regenerating brine. The during the flushing DV via the water inlet 22 in the rinsing chamber 7 reaching Regeneriersole can then by means of the drain pump 31 be pumped to the outside. During the feed sequence Z ₄ of the purging DV, the inlet valve 17 opened for a period of time which corresponds to a further timing value ZV ₄ , which has also been determined taking into account the characteristic Zulaufwasserstrom QC, so that the provided for the Durchspülvorgang DV amount of feed water ZW can be recorded with great accuracy. As a result, the water consumption of the dishwasher 1 be further optimized.

The second in the 4 shown rinse SG 'corresponds to the above-described rinse SG. However, the water inlet device points 13 the dishwasher used 1 in the 3 shown characteristic K 'on. Therefore, the measurement performed in advance results in a higher characteristic inflow or throughput QC '. This in turn means that the time specification values ZV ' ₁ , ZV' ₂ , ZV ' ₃ , ZV' ₄ ZV ' ₅ , ZV' ₆ used in the rinse SG 'are smaller than the corresponding time specification values ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ ZV ₅ , ZV _{6 of} the wash SG. In this way, it is ensured that the same amount of feed water ZW is received in each of the feed sequences Z ' ₁ , Z' ₂ , Z ' ₃ , Z' ₄ Z ' ₅ , Z' ₆ , which also has the corresponding feed sequence Z ₁ , Z ₂ , Z ₃ , Z ₄ Z ₅ , Z _{6 of} the rinse SG is recorded.

Also the third in the 4 shown rinse SG '' corresponds to the above-described rinse SG. However, the water inlet device points 13 the dishwasher used here 1 in the 3 shown characteristic K '' on. This results in the previously performed measurement a smaller characteristic inlet flow or throughput QC ''. Therefore, the timing values ZV " ₁ , ZV" ₂ , ZV " ₃ , ZV" ₄ ZV " ₅ , ZV" ₆ used in the rinse cycle SG "are greater than the corresponding time specification values ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ ZV ₅ , ZV _{6 of} the wash SG. In this way, it is ensured that even with each of the feed sequences Z " ₁ , Z" ₂ , Z " ₃ , Z" ₄ Z " ₅ , Z" _6, the same amount of feed water ZW is received, which contains is also recorded at the respective corresponding feed sequence Z ₁ , Z ₂ , Z ₃ , Z ₄ Z ₅ , Z ₆ .

In an advantageous embodiment, the invention particularly relates to a dishwasher, which is equipped with a flow restrictor or a flow regulator. 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.

Q:

Volumenstrom

Δm:

zugelaufene Wassermenge

t:

Zeit

During filling in the production test program, the volume flow through the inlet valve is determined in the nominal pressure range. Where: Q = Δm / Δt

Q:

flow

Dm:

accumulated amount of water

t:

Time

The characteristic volumetric flow of each individual inlet valve is stored in the corresponding control. As a result, very accurate filling accuracies can be achieved in the nominal pressure range (0.5-6 bar) for devices without impeller counter.

In this way, devices without impeller are possible in which at nominal pressure (0.5-6 bar) very exact quantities can be realized, which can be dispensed with a sorting of the intake valves in terms of the tolerance range of the volume flow, resulting in a cost savings. The label limits can be adhered to. In In many cases, 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.

In summary, according to an advantageous embodiment, in particular a pre-measurement or a kind of calibration of the filling valve with regard to its characteristic throughput behavior, preferably factory or by the factory customer service z. B. in 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. For pre-measurement, 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. Expediently, this measured throughput, which describes a characteristic property for the flow behavior of the respective valve in the nominal pressure range of the external water line, is preferably stored in the control device of the dishwasher. In addition or independent of this measured throughput value, it is optionally possible to determine at least one time-specification value which is determined from the ratio or quotient of the respectively specified setpoint feed-in quantity that is actually to run, ie. H. should enter the dishwasher, and the measured valve characteristic throughput results, and deposited in the storage device. Conversely, 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 intake 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 throughput 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. It may also be expedient if a plurality of throughput values of the respective intake valve are in each case for different operating points, d. H. Pressures in the nominal pressure range of the respective existing external water supply are measured in advance, d. H. a plurality of individual flow streams 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. In particular, 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. Possibly. can also be the functional relationship of a plurality of determined Zulaufwasserstrom - or inlet water flow rates of the respective valve also by a mathematical relationship such. B. be represented by a mathematical function or by a table. Additionally or independently thereof, 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 inflow 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 inflow valve. As a result, by controlling or regulating in particular the opening times and / or closing times or, in other words, associated opening periods and / or closing periods of the respective inlet valve, the actual amount of feed water actually entering the dishwasher is metered, ie. H. be supplied controlled in a defined manner. For each time value is then a specific Zulaufwassermenge, which actually flows through the inlet valve in dependence on the flow rate characteristic in the dishwasher, assigned in a defined manner.

In particular, this pre-measurement of the inlet valve and the associated derivation and storage of one or more control parameters for one or more other components 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.

Fehlzumessungen on Zulaufwassermengen that z. B. due to manufacturing tolerances of the inlet valve and / or other components of the water inlet device could be largely avoided. As a result, a dedicated concentricity monitoring device is not required.

5 shows an initial phase of a wash cycle SG one in the 1 and 2 shown dishwasher 1 , which is modified to compensate for a low pressure p of the device external water supply device WH. For reasons of space, only the pre-wash cycle VG, a part of the cleaning cycle RG and a part of the regeneration process RV embedded therein are shown.

The dishwasher 1 can be designed so that in addition to the respective feed sequence Z ₁ , Z ₂ , Z ₃ additionally an optionally activatable additional feed sequence ZZ ₁ , ZZ ₂ , ZZ _{3 is} automatically carried out to receive an intended amount of feed water ZW. In the additional inlet sequences ZZ ₁ , ZZ ₂ , ZZ ₃ is the inlet valve 17 the water inlet device 13 by the control device 2 for an additional time specified value ZZV ₁ , ZZV ₂ , ZZV ₃ corresponding duration additionally opened. As a result, the inclusion of too small an amount of feed water ZW can be avoided at a low pressure p of the external water supply device WH, which could lead to a poor rinse and / or drying result. It may also be a poor maintenance of the ion exchanger 38 the softening device 21 be prevented. Due to the time-dependent implementation of the additional feed sequences ZZ ₁ , ZZ ₂ , ZZ ₃ no sensor for detecting the total recorded amount of feed water ZW is required for their implementation.

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 3 shown flow characteristic K, K ', K''of the respective individual water inlet device 13 be determined. For example, 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. In this way, the intake of a sufficient amount of feed 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''below the characteristic inlet water flow QC, QC', QC '' falls off, be assured. Will the dishwasher 1 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. It can be taken into account that in dishwashers 1 usually as a backflow preventer 19 used in the area of the water inlet device pipe breaks 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 not available. The additional time specification value ZZV ₁ , ZZV ₂ , ZZV ₃ can be used as a fixed value in the control device 2 be deposited or by the control device 2 be determined according to an algorithm that takes into account, for example, intended for recording amount of feed water ZW and / or the actual or expected pressure p of the water supply device WH.

The activation or deactivation of the additional feed sequences ZZ ₁ , ZZ ₂ , ZZ ₃ can be done manually via the operating device 3 take place, since the operator of the pressure p of the feed water ZW supplying water supply device WH is known in the rule. This is a simple design of the dishwasher 1 possible. Alternatively or additionally, the dishwasher 1 be designed for automatic activation of Zusatzzulaufsequenzen ZZ ₁ , ZZ ₂ , ZZ ₃ , which can increase the ease of use and avoid operator error.

In 5 now shows a curve Z17 the time course of the operating state of the inlet valve 17 the dishwasher 1 , where the value "1" is an open and the value "0" a closed inlet valve 17 represents. 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. In the example of 5 goes the feed sequence Z ₁ directly into the additional inlet sequence ZZ ₁ , without the inlet 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.

Further shows 5 in that the feed sequence Z ₂ provided to cover the water requirement of the cleaning cycle RG is assigned an additional feed sequence ZZ ₂ and the feed sequence Z ₂ provided to cover the water quantity requirement of the regeneration process RV is assigned an additional feed sequence ZZ ₂ . It goes without saying that the feed sequence Z ₄ of the purging process DV, the feed sequence Z _{5 of} the intermediate rinse cycle ZG and the feed sequence Z _{6 of} the rinse cycle KG, which in 4 are shown, each one additional feed sequence can be assigned.

6 illustrates an example of an automatic activation of the additional feed sequences in a wash cycle SG of the dishwasher of 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 4 and 5 explained, is the inlet valve 17 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. For comparison, 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.

While the actual amount of water AMM received when the minimum pressure reached by the respective dishwasher at the end of the feed sequence Z ₁ just corresponds to their intended set amount VM of feed water ZW, 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 is WH under the intended minimum pressure GD _U.

In order to be able to recognize this state without the actually recorded amount AM being measured by means of a flowmeter, for example by means of an impeller counter, the circulating pump is 25 the dishwasher 1 a sensor 28 assigned to the acquisition of electrical power PL. The circulation pump 25 is in 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. For comparison, a dotted nominal load curve PM is shown, which is the power consumption PL of the circulation pump 25 shows which would result in the case of a pressure p of the water supply device WH, which is above the minimum pressure GD _U in the intended nominal pressure range NB.

The detection of a too low pressure p with respect to the nominal pressure range now takes place on the basis of measurements M _a , M _{b of} the actual power consumption PL of the circulating pump 25 , which is represented by the Istlastkurve PM, wherein the circulation pump 25 at least during the performance of the measurements M _a , M _b . is turned on. If necessary, the pump could also be switched off between the measurements. The execution and evaluation of two measurements M _a , M _b is exemplary. In principle, it would also be possible to carry out only a single measurement. In order to be able to make a more reliable statement about the pressure p, however, it makes sense to use two or preferably more than two measurements M _a , M _b . Is now - in particular by the control device of the dishwasher - found that the one or more load values of the pump, which at the one or more measuring times of the one or more measurements such. B. M _a , M _{b are} measured or determined at these measuring times below, in particular with a predetermined reduction factor, are below the load values of the nominal load curve PM, this indicates the presence of a low pressure range for the water inlet device. In an analogous manner, of course, 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 6 have been omitted for the sake of clarity of drawing.

If necessary, 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. For this purpose, the inlet valve is expediently opened and closed alternately.

Appropriately, takes place here in the embodiment of 6 the first measurement M _a 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 . In this way, distortions of the measurement M _a , which are based on the fact that at the beginning of the feed sequence Z ₁ residual water from a previous feed sequence in the circulation pump 25 is at least reduced.

Advantageously, 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.

Preferably, 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. In this way, the evaluation of the plurality of measurements M _a , M _b simplifies. In order to enable a plurality of measurements M _a, M _b, 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. As a result, 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. For example, during the circulation of the rinsing liquid S formed from the feed water ZW, an increasing proportion of rinsing liquid S for the circulation cycle is lost through rinsing liquid adhering to the items to be washed, so that the power PL of the circulating pump 25 falls below a value that would be observed without this effect. Likewise, 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 by the control device 2 the dishwasher 1 respectively. The control device 2 can then activate at a drop below the minimum pressure GD _U, the additional feed sequence ZZ ₁ to accommodate still missing feed water ZW, so that the end of the additional feed sequence ZZ ₁ . the intended amount of VM is ideally achieved.

For the in 6 not shown inlet sequences Z ₂ , Z ₃ , Z ₄ Z ₅ , Z _{6 of} the wash cycle SG, the activation of a respective associated feed sequence ZZ ₂ , ZZ ₃ , ZZ ₄ ZZ ₅ , ZZ ₆ also automatically by the controller 2 respectively. 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. Alternatively, however, 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 .

In summary, the following results: In particular, a compensation of the filling tolerance in a filling system or a water inlet device without impeller counter may be appropriate. So z. B. inlet valves / Aquastop valves of the water inlet device manufacturing tolerances, for example, +/- 10% with respect to the flow rate. In particular, during the factory assembly of the respective dishwasher, the specific flow 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 z. B. determined via Coriolis mass flowmeter.

This measured value can be stored. It can be provided that this determined specific flow rate (in the nominal range) is preferably "online", ie. H. Immediately after measurement in a storage space of the control device (in particular the so-called power module) to transmit 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.

Here, in addition, 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.

Furthermore, preferably a hardness table can be stored which determines the regeneration intervals in accordance with the set water hardness.

• • Flügelradzähler ist nicht erforderlich => Kosteneinsparung
• • Genaues Füllsystem im Nennbereich => exakte Füllmengen, Einhaltung von Verbrauchs-„Label”-Werten
• • Zeitliches Regenerieren mit hoher Genauigkeit im Nennbereich
• • Berücksichtigung verschiedener Härtebereiche über zeitliches Regenerieren
• • Wassereinsparpotential auch bei Geschirrspülvollautomat ohne Flügelradzähler
• • Verbesserte Einhaltung bestehender Verbrauchs-Label-Werte (Wasserverbrauch) möglich
• • Gerätefunktion in zulässigen Bereichen unabhängig von der Toleranz des Einlassventils/Aquastop-Ventils

This results in particular the following advantages:

• • Impeller counter is not required => cost savings
• • Accurate filling system in the nominal range => exact filling quantities, compliance with consumption "label" values
• • Time regeneration with high accuracy in the nominal range
• • Consideration of different hardness ranges over time regeneration
• • Water saving potential even with automatic dishwasher without impeller counter
• • Improved compliance with existing consumption label values (water consumption) possible
• • Device function in permissible ranges regardless of the tolerance of the inlet valve / Aquastop valve

Furthermore, a compensation for low-pressure areas of the external water supply device may optionally be expedient by extending the activation time. In order to take into account the influences of low pressure house connections, in particular an option function can be realized. For example, an option key can be used to influence the amount of regeneration - if, for example, B. the user is aware that the external water supply device is operated in Niederduckbereich - by the driving time of the inlet valve of the water inlet device and the regeneration valve of the water softening system is increased.

• • Verbesserung der Enthärtungsfunktion im Niederdruckbereich => Verbesserung von Spülleistung und Trocknungsleistung
• • Spezielles Geräteverhalten für Haushalte mit Niederdruckanschluss möglich, ohne Auswirkungen auf Normbedingungen und Testinstitute
• • Optional als ausschließliche Kundendienstlösung denkbar.

This results in particular the following advantages:

• • Improvement of the softening function in the low pressure range => Improvement of flushing performance and drying performance
• • Special device behavior for households with low-pressure connection possible, without affecting standard conditions and test institutes
• • Optionally conceivable as exclusive customer service solution.

Likewise, for a low pressure detection, an alternative variant may be expedient in which an automatic determination of the present pressure range via 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. Through a continuous or stepwise time filling process, 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.

• • Gerätefunktionen können an die Anschlussbedingungen (wie z. B. Volumenstrom, Druck) angepasst werden
• • Mögliche Berücksichtigung der Anschlussbedingungen für das Geräteverhalten
• • Genaue Einstellbarkeit der Enthärtungsanlagenfunktionen (z. B. Salzverbrauch, Regenerierintervalle, Regeneriermenge)
• • Berücksichtigung eines sich im Niederdruckbereich erhöhenden Leckanteils (erhöhter Rohwasseranteil) über die „freie Fließstrecke” (Rohrunterbrecher) des Wasserzulaufsystems

This automatic recognition of the connection conditions results in particular the following advantages:

• • Device functions can be adapted to the connection conditions (such as volume flow, pressure)
• • Possible consideration of the connection conditions for the device behavior
• • Accurate adjustability of the softening system functions (eg salt consumption, regeneration intervals, amount of regeneration)
• • Consideration of a leakage component (increased raw water content) increasing in the low-pressure range via the "free flow path" (pipe breaker) of the water supply system

LIST OF REFERENCE NUMBERS

1

dishwasher

2

control device

3

operating device

4

output device

5

rinse tank

6

door

7

rinsing chamber

8th

casing

9

upper dish rack

10

lower crockery basket

11

out rail

12

out rail

13

Water inlet device

14

connector

15

connecting hose

16

fixed housing

17

inlet valve

18

Durchflusseinstelleinrichtung

19

Non-return valve, pipe interruption

20

Leakage water drain

21

softener

22

water inlet

23

Bottom of the washing container

24

Collection device, collection pot

25

circulating pump

26

upper spray arm

27

lower spray arm

28

sensor

29

metering

30

outflow device

31

Drain pump

32

fixed housing

33

drain hose

34

connector

35

Data Interface

36

Changeover valve, water separator

37

regenerant

38

ion exchanger

39

signal line

40

signal line

41

control line

42

control line

43

signal line

44

control line

45

control line

46

data line

WH

Water supply device, faucet

ZW

water supply

LW

bilge

W

soft water

S

rinse

AR

Sanitation facility, sewer pipe

AW

sewage

RM

regenerating

A

first switching position

B

second switch position

Q

Inlet water flow

p

Pressure of the external water supply device

K

Characteristic of the water inlet device

NB

Rated pressure range

MNB

middle range of nominal pressure range

GD _U

lower limit of the nominal pressure range

GD _O

upper limit of the nominal pressure range

QC

characteristic inlet water flow

SG

rinse

VG

prewash

RG

cleaning cycle

ZG

intermediate rinsing

KG

rinse cycle

TG

drying cycle

RV

recovery operation

DV

purging

Z17

Operating condition of the inlet valve

t

Time

Z

feed sequence

ZV

Timing value

ZZ

Additional feed sequence

ZZV

Additional time default

AT THE

actually absorbed amount of feed water

AMM

absorbed amount of feed water above the minimum pressure

P

actual performance of the circulation pump

PM

Performance of the circulation pump above the minimum pressure

VM

Intended for receiving amount of feed water

VP

Provided capacity of the circulation pump

TZ

Part feed sequence

TM

Subset of intended for inclusion amount of feed water

M

Measurement

Claims (16)

Dishwasher, in particular domestic dishwasher ( 1 ), with a control device ( 2 ) for carrying out at least one wash cycle (SG) for cleaning items to be washed and with a water feed device ( 13 ), which is connectable to receive an inlet water (ZW) with an external water supply device (WH), wherein the water inlet device ( 13 ) by the control device ( 2 ) openable and closable inlet valve ( 17 ) as well as an automatic flow setting device ( 18 ) to the pressure (p) of the external water supply device (WH) largely independent setting of an open inlet valve ( 17 ) in a nominal pressure range (NB) of the flow control device ( 18 ) adjusting Zulaufwasserstroms (Q), characterized in that the rinse cycle (SG) at least one time-controlled feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) for receiving a predetermined amount (VM) of feed water (ZW), in which the inlet valve ( 17 ) by the control device ( 2 ) is open for a time corresponding to a time value (ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ , ZV ₅ , ZV ₆ ), wherein the timing value (ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ , ZV ₅ , ZV ₆ ) taking into account a characteristic inlet water flow (QC) of the water feed device (QC) measured in advance in the nominal pressure range (NB) by means of an external measuring device ( 13 ) is determined. Dishwasher according to claim 1, characterized in that the characteristic inlet water flow (QC) in advance in the control device ( 2 ) is deposited. Dishwasher according to one of the preceding claims, characterized in that the control device ( 2 ) for determining the time value (ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ , ZV ₅ , ZV ₆ ) taking into account the deposited characteristic Zulaufwasserstroms (QC) is formed. Dishwasher according to one of the preceding claims, characterized in that a data interface ( 35 ) is provided, via which the control device ( 2 ) can be connected to the external measuring device in order to automatically determine the measured characteristic inlet water flow (QC) and / or the time value (ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ , ZV ₅ , ZV ₆ ) determined therefrom in the control device (QC). 2 ) to deposit. Dishwasher according to one of the preceding claims, characterized in that the flow adjustment device ( 18 ) has at least one actuatable by the inlet water (ZW) throttle body for influencing the flow from the feed water (Q) can be flowed through cross-section. Dishwasher according to one of the preceding claims, characterized in that a softening device ( 21 ) with an ion exchanger ( 38 ), which is maintainable by means of an automatically executable maintenance sequence (RV, DV), wherein the maintenance sequence (RV, DV) a regeneration process (RV) for regenerating the ion exchanger ( 38 ) and / or a flushing process (DV) for purging the ion exchanger ( 38 ) and wherein at least one of the timed feed sequences (Z ₃ , Z ₄ ) for receiving a predetermined amount of feed water (ZW) for the regeneration process (RV) and / or the Durchspülvorgang (DV) is provided. Dishwasher according to one of the preceding claims, characterized in that the control device ( 2 ) for determining the total amount of softened by the softener inlet water (ZW) and for initiating the maintenance sequence (RV, DV) depending on the total amount determined and in dependence on the hardness of the feed water (ZW) is formed. Dishwasher, in particular according to one of claims 1 to 7, with a control device ( 2 ) for carrying out at least one wash cycle (SG) for cleaning items to be washed and with a water feed device ( 13 ), which is connectable to receive an inlet water (ZW) with an external water supply device (WH), wherein the water inlet device ( 13 ) by the control device ( 2 ) openable and closable inlet valve ( 17 ) as well as an automatic flow setting device ( 18 ) to the pressure (p) of the external water supply device (WH) largely independent setting of an open inlet valve ( 17 ) in a nominal pressure range (NB) of the flow control device ( 18 ) adjusting Zulaufwasserstroms (Q), characterized in that the rinse cycle (SG) at least one time-controlled feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) for receiving a predetermined amount (VM) of feed water (ZW), in which the inlet valve ( 17 ) by the control device ( 2 ) is open for a time corresponding to a time value (ZV ₁ , ZV ₂ , ZV ₃ , ZV ₄ , ZV ₅ , ZV ₆ ), wherein one of the feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) associated optionally activatable additional feed sequence (ZZ ₁ , ZZ ₂ , ZZ ₃ ), in which the inlet valve ( 17 ) by the control device ( 2 ) is open for a duration corresponding to an additional time specification value (ZZV ₁ , ZZV ₂ , ZZV ₃ ), can be activated when the pressure (p) of the external water supply device (WH) is below a predetermined minimum pressure (GD _U ). Dishwasher according to the preceding claim, characterized in that an operating device ( 3 ) is provided, which allows a manual activation of the additional feed sequence (ZZ ₁ , ZZ ₂ , ZZ ₃ ) by an operator. Dishwasher according to claim 8 or 9, characterized in that the control device ( 2 ) for detecting an undershooting of the minimum pressure (GD _U ) by evaluating at least one measurement (M _a , M _b ) of a sensor during one of the feed sequences (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) 28 ) and for automatic activation of the additional feed sequence (ZZ ₁ , ZZ ₂ , ZZ ₃ ) is formed at a detected shortfall. Dishwasher according to the preceding claim, characterized in that the sensor ( 28 ) for detecting at least one operating parameter (P) of a pump ( 25 . 31 ), in particular a circulating pump ( 25 ) or drain pump ( 31 ), which is supplied with the feed water (ZW) at the respective feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) is formed. Dishwasher according to claim 11, characterized in that the operating parameter (P) the electrical power consumption (P) of the pump ( 25 . 31 ). Dishwasher according to one of claims 10 to 12, characterized in that the detection of an undershooting of the minimum pressure (GD _U ) by evaluation of several measurements (M _a , M _b ) takes place. Dishwasher according to one of claims 10 to 13, characterized in that the first measurement (M _a ) at the end of a partial feed sequence (TZ _a , TZ _b ) for receiving a subset (TM _a , TM _b ) of the feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) total provided amount (VM) of feed water (ZW) takes place. Dishwasher according to one of claims 10 to 14, characterized in that the feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) a plurality of successive Teilzulaufsequenzen (TZ _a , TZ _b ) for receiving a subset (TM _a , TM _b ) for the feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) total provided amount (VM) of feed water (ZW), wherein the measurements (M _a , M _b ) take place at the end of each of the partial feed sequences (TZ _a , TZ _b ). Method for carrying out at least one wash cycle (SG) for cleaning items to be washed by means of a control device ( 2 ) a dishwasher ( 1 ), in particular a dishwasher ( 1 ) according to one of the preceding claims, which comprises a water feed device ( 13 ), which is connectable to receive an inlet water (ZW) with an external water supply device (WH), wherein the water inlet device ( 13 ) by the control device ( 2 ) openable and closable inlet valve ( 17 ) and an automatic flow adjustment device ( 18 ) to the pressure (p) of the external water supply device (WH) largely independent setting of an open inlet valve ( 17 ) in a nominal pressure range (NB) of the flow control device ( 18 ) adjusting feed water flow (Q), characterized in that in the rinse cycle (SG) at least one time-controlled feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) for receiving a predetermined amount (VM) of Inlet water (ZW) is carried out at which the inlet valve ( 17 ) by the control device ( 2 ) is opened for a duration corresponding to a time value (ZV), the time setting value (ZV) taking into account a characteristic inlet water flow (QC) of the water feed device (QC) measured in advance in the nominal pressure range (NB) by means of an external measuring device. 13 ), and / or wherein one of the feed sequence (Z ₁ , Z ₂ , Z ₃ , Z ₄ , Z ₅ , Z ₆ ) associated optionally activatable time-controlled additional feed sequence (ZZ ₁ , ZZ ₂ , ZZ ₃ ), wherein the inlet valve ( 17 ) by the control device ( 2 ) is opened for a duration corresponding to an additional time specification value (ZZV ₁ , ZZV ₂ , ZZV ₃ ), is activated when the pressure (p) of the external water supply device (WH) is below a predetermined minimum pressure (GD _U ).

Images