EP2377450A2 - Lave-vaisselle doté d'un dispositif d'amenée d'eau - Google Patents

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

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Publication number
EP2377450A2
EP2377450A2 EP11158656A EP11158656A EP2377450A2 EP 2377450 A2 EP2377450 A2 EP 2377450A2 EP 11158656 A EP11158656 A EP 11158656A EP 11158656 A EP11158656 A EP 11158656A EP 2377450 A2 EP2377450 A2 EP 2377450A2
Authority
EP
European Patent Office
Prior art keywords
water
inlet
feed
control device
dishwasher
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11158656A
Other languages
German (de)
English (en)
Other versions
EP2377450A3 (fr
Inventor
Andreas Heidel
Reinhard Hering
Bernd KRÄNZLE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2377450A2 publication Critical patent/EP2377450A2/fr
Publication of EP2377450A3 publication Critical patent/EP2377450A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0023—Water filling
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4229—Water softening arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/14—Water pressure or flow rate
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/20—Time, e.g. elapsed operating time
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/18—Water softening devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Definitions

  • the present invention relates to a dishwasher, in particular domestic dishwasher, with a control device for performing at least one rinse for cleaning items to be washed and with a water inlet device, which is connectable to receive feed water with an external water supply device, wherein the water inlet means open by the control device and closable inlet valve and an automatic flow adjustment to the pressure of the external water supply device largely independent setting of an adjusting with open inlet valve in a nominal pressure range of the flow adjustment adjusting inlet water flow.
  • the object of the present invention is to provide a dishwashing machine, in particular a household dishwasher, in which the intake of feed water is improved.
  • the rinse includes at least one time-controlled feed sequence for receiving a predetermined amount of feed water, wherein the inlet valve is opened by the controller for a time corresponding to a preset time duration, the time value taking into account a characteristic inlet water flow of the water inlet device measured in advance in the nominal pressure range by means of an external measuring 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.
  • the control device can be designed as so-called sequence control, in particular as electronic sequence control.
  • the water inlet device is designed so that it can be connected to an external, ie outside the dishwasher, water supply device, in particular with a building side installed water supply device such as drinking water pipe, so that the implementation of Rinses required inlet water can be added.
  • the water inlet device has an inlet valve, which can be opened and closed by the control device, so that the intake of feed water can be carried out automatically.
  • the inlet valve may in particular be a solenoid valve which can only be brought into an open position and into a closed position, which simplifies the construction of the dishwasher.
  • the water inlet device comprises a flow adjustment device which is provided to 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.
  • 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 correct flow controller.
  • a predetermined amount of feed water into the dishwasher for one or more liquid-conducting partial rinses.
  • the respective amount is given on the basis of purging technology considerations and in particular on the basis of empirical values.
  • 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.
  • 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 into the dishwasher tapers.
  • the respective inlet valve is opened and closed repeatedly or partially for partial opening periods, in particular clocked by opening and closing such that the sum of its partial opening periods substantially corresponds to the respective preset time value and one with
  • the supply water quantity corresponding to the time value is introduced in portions or in stages into the dishwasher or is taken up by it.
  • feed sequence thus includes, inter alia, in particular both such a continuous feed process and also a feed process which is divided in a stepwise or discrete manner.
  • the pressure of the external water supply device Due to the pressure of the external water supply device, in particular in its nominal pressure range, largely independent adjustment of the feed water flow by means of the flow adjustment is here at least in the nominal pressure range, the recorded amount of feed water substantially proportional to the opening duration of the inlet valve and thus to the time value.
  • the intended amount of feed water can be absorbed without the need for a sensor to determine the amount of feed water actually received.
  • the characteristic inlet water flow is preferably the actual feed water flow of an individual water inlet device, which adjusts to a supply to a water supply device, which supplies feed water in the nominal pressure range, with open inlet valve.
  • the measurement of the characteristic feed water flow takes place before the execution of the respective filling sequence. Since the characteristic supply water flow usually remains constant over a relatively long period of time, it is sufficient in many cases if it is measured only once, for example before the first start-up of the dishwasher. In particular, the measurement within the factory final inspection before delivery of the dishwasher or when installing the dishwasher done on site.
  • CMD Coriolis mass flowmeter
  • the relationship between the opening duration and the intake water intake amount can be determined for an individual, i. respectively predetermined water inlet device can be detected with high accuracy.
  • the timing value leading to the intake of the intended amount of feed water can be accurately determined. This in turn means that the intended amount of feed water is maintained with the highest accuracy during operation of the dishwasher 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 transducer that detects the actually recorded amount of feed water.
  • the high accuracy can be achieved even with a deviation of the actual flow characteristic of the respective individual water supply device from an intended target flow characteristic.
  • Such deviations can be achieved, for example, by series variations of the flow through capability of the components of the water feed device, for example the inlet valve and / or the flow setting device and / or the water supply line.
  • the characteristic feed water flow can be stored in advance in the control device, wherein the control device is designed to determine the time specification value taking into account the entered characteristic feed water flow.
  • the control device may have a reserved storage space in a preferably non-volatile memory for storing the characteristic feed water flow.
  • the time value can then be automatically determined for each feed phase on the basis of the amount of feed water provided for this purpose.
  • the determination of the timing value may be made on the basis of value tables or the like stored in the controller.
  • the time value can be stored in advance in the control device.
  • the determination of the required timing values can be done externally taking into account the characteristic Zulaufwasserstroms, so that the control device can be made simpler.
  • the control device can in each case have a reserved memory space for storing a time specification value corresponding to the respective quantity in a preferably non-volatile memory.
  • a data interface is provided, via which the control device can be connected to the external measuring device in order to store the measured characteristic inlet water flow and / or the time value determined therefrom, preferably automatically in the control device.
  • the deposit of the measured characteristic feed water flow can be performed automatically, so that the preparation of the dishwasher for performing rinsing operations is simplified.
  • transmission errors can be avoided, which are avoided in a manual input of the characteristic Zulaufwasserstroms and / or the timeout value determined therefrom.
  • the nominal pressure range comprises at least the range from 1 bar to 6 bar, preferably from 0.75 bar to 8 bar, particularly preferably from 0.5 bar to 10 bar.
  • the named nominal pressure ranges ensure a wide range of use of the dishwasher. In particular, exact intake quantities of feed water can be ensured even with larger pressure fluctuations of the external water supply device.
  • the measurement of the characteristic feed water flow takes place in a middle region of the nominal pressure range, for example in a range from 2 bar to 4 bar.
  • a characteristic inlet water flow measured in this way represents the inlet water flow which adjusts over the entire nominal pressure range particularly well, since, according to experience, the flow characteristic in the medium nominal pressure range runs almost ideally.
  • the flow adjustment device has at least one throttle body operable by the inlet water for influencing the cross-section through which the feed water flow can flow.
  • the throttle body may be mounted such that it can be deflected against the pressure of a spring by the pressure of the feed water flow from a rest position such that it reduces the flow-through cross section of the flow adjustment as a function of pressure so that adjusts a quasi-constant supply water flow.
  • the influencing of the flow-through of the feed water flow cross-section is effected by an elastic deformation of the throttle body.
  • the flow adjustment device can have as a throttle body a disk of an elastic material, such as rubber, oriented transversely to the feed water flow, which deforms with increasing inlet water flow in such a way that it increasingly closes one or more throughflow openings formed downstream of the disk.
  • At least one of the time-controlled feed sequences for receiving a predetermined amount of feed water is provided for in each case one water-carrying partial wash cycle of the wash cycle.
  • a typical rinse cycle of a dishwashing machine comprises in particular at least one pre-rinse cycle for pre-cleaning items, at least one cleaning cycle for thorough cleaning of items to be washed, at least one intermediate rinse for removing soiled rinse liquid from the items to be washed, at least one rinse cycle to avoid stains on items to be washed and / or for preparation of items Drying step, and / or at least one drying cycle for drying the dishes.
  • Rinse cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-conducting partial rinses, since during their implementation, the introduced into the rinsing chamber items to be treated with a rinsing liquid.
  • a use of rinsing liquid is usually not provided.
  • a softening device with an ion exchanger which can be maintained by means of an automatically executable maintenance sequence, wherein the maintenance sequence comprises at least one regeneration process for regenerating the ion exchanger and / or at least one flushing process for rinsing the ion exchanger, and 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.
  • the feed water received by the water feed device is initially provided via a softening device for softening or decarbonating of water before it is used for a rinse or rinse.
  • the softening device may comprise an ion exchanger for softening and / or desalting water and a maintenance device for servicing the ion exchanger.
  • the ion exchanger may contain a resin having the property of sorbing calcium ions or magnesium ions dissolved in the feed water, thereby reducing the lime content of the feed water.
  • a maintenance device may be provided, which is designed for automatic maintenance of the ion exchanger.
  • the maintenance of the ion exchanger expediently comprises at least one regeneration process and at least one flushing process.
  • the ion exchanger can be supplied with a regenerating brine previously prepared from water and regenerating agent, in particular regenerating salt, which essentially contains sodium chloride in aqueous solution.
  • regenerating brine previously prepared from water and regenerating agent, in particular regenerating salt, which essentially contains sodium chloride in aqueous solution.
  • the regenerating brine is usually prepared in a Regeneriersole worn and kept ready until the beginning of the respective regeneration process to be performed.
  • the regenerating brine can then be passed into the ion exchanger at the beginning of the regeneration step by the regenerating brine being pressed into the ion exchanger by feed water taken in as part of a timed feed sequence.
  • the amount of intake water absorbed just corresponds to the amount of regenerant brine pressed into the ion exchanger.
  • the ion exchanger is flushed through by a feed water from the water inlet device in a flushing process, so as to dissipate the regenerating brine from the ion exchanger, so that the ion exchanger is again available for softening water for an advantageous further development.
  • a feed water from the water inlet device in a flushing process, so as to dissipate the regenerating brine from the ion exchanger, so that the ion exchanger is again available for softening water for an advantageous further development.
  • the control device is designed to determine the total amount of water softened by the softening device and to initiate the maintenance sequence as a function of the determined total quantity and depending on the hardness of the feed water.
  • the total amount of the softened feed water can be determined with high accuracy in an advantageous manner by starting from the completion of a maintenance sequence, the absorbed amounts of feed water or the timing of those feed sequences are added, the feed water is softened. These are usually those feed sequences which are carried out to form a rinse liquid for a water-carrying section réellegang.
  • the hardness of the feed water which represents the amount of hardness in the feed water, can be determined with great accuracy, whether the ion exchanger still has a sufficient capacity for softening of feed water, or whether a further maintenance sequence is required. This ensures that a maintenance sequence is performed only when it is actually required. This leads in particular to a reduction of the water and / or regenerant consumption of the dishwasher, without the dishwashing result being impaired.
  • the 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 Receiving water can be connected to an external water supply device, wherein the water supply 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.
  • At least one time-controlled feed sequence for receiving a predetermined amount of feed water is carried out during the wash cycle, in which the feed valve is opened by the control device for a duration corresponding to a time value, the time setting taking into account a characteristic measured beforehand in the nominal pressure range by means of an external measuring device Inlet water flow of the water inlet device is determined.
  • the inventive method allows the operation of the dishwasher in the implementation of the feed sequence to comply with the intended amount of feed water with the highest accuracy.
  • a measurement of the actually recorded amount of feed water in the feed sequence is not required here. Therefore, the water inlet device of the dishwasher according to the invention requires no extra or additional transducer that detects the actually recorded amount of feed water.
  • the compensation according to the invention by at least one timed feed sequence, i. by "filling the time", ie the opening of the water inlet device for a certain period of time, a running-in correlating with this opening time duration Zulaufwasser-filling amount in the dishwasher actually run as actual feed water filling quantity.
  • FIG. 1 shows an advantageous embodiment of a household dishwasher according to the invention 1 in a schematic side view.
  • the dishwasher 1 has a control device 2, in which at least one wash program for controlling a wash cycle for washing dishes, in particular dishes, is deposited.
  • a plurality of washing programs are stored, so that by selecting a suitable washing program, the sequence of a controlled by the control device 2 rinse, for example, to the Loading amount, can be adapted to the type of loading, to the degree of contamination of the dishes and / or to the desired duration of the wash cycle.
  • the control device 2 is associated with an operating device 3, which allows an operator of the dishwasher 1 to call one of the washing programs and thereby start. Furthermore, the control device 2 is associated with an output device 4, which allows the output of messages to the operator.
  • the output device 4 may comprise indicator lamps, light-emitting diodes, an alpha-numeric display and / or a graphic display for outputting optical messages. Furthermore, the output device 4 may have a buzzer, a loudspeaker and / or the like for the output of acoustic messages.
  • the dishwasher 1 further comprises a rinsing container 5, which can be closed by a door 6, so that a closed rinsing chamber 7 is formed for rinsing dishes.
  • the rinsing container 5 can be arranged inside a housing 8 of the dishwasher 1. In built-in dishwashers, the housing 8 is not required and may be omitted altogether at the top.
  • the door 6 is shown in its closed position. The door 6 can be brought into an open position by pivoting about an axis arranged perpendicular to the plane of the drawing, in which it is aligned substantially horizontally and allows the introduction or removal of items to be washed.
  • the operating device 3 is arranged in an easy to use manner on an upper portion of the door 6.
  • the output device 4 is also arranged on the upper portion of the door 6, so that optical messages are clearly visible and audible messages are clearly audible.
  • the control device 2 is also positioned there, so that the required signal connections between the operating device 3, the output device 4 and the control device 2 can be kept short. In principle, however, it is possible to arrange the operating device 3, the output device 4 and / or the control device 2 elsewhere. In particular, according to an alternative embodiment, the control device 2 may possibly also be accommodated in a base module below the washing compartment 5.
  • the control device 2 could also be designed decentralized, which is understood to mean that they are spatially separated components includes, which are connected via communication means such that they can cooperate.
  • the dishwasher 1 has an upper dish rack 9 and a lower dish rack 10 for positioning dishes.
  • the upper dish rack 9 is arranged on extension rails 11, which are each attached to opposite, extending in the depth direction of the washing compartment side walls of the washing compartment 5.
  • the dish rack 9 can be moved out of the washing container 5 by means of the extension rails 11, which facilitates the loading and unloading of the upper dish rack 9.
  • the lower dish rack 10 is arranged on extension rails 12 in an analogous manner. He is in the approximately horizontal Offenend ein the door on this out, i. The door forms a kind of support table for him.
  • the one or more stored in the control device 2 washing programs can each provide several Operalustruderie, for example, in this order at least one prewash, at least one cleaning cycle, at least one intermediate rinse, at least one rinse and / or at least one drying cycle.
  • pre-wash cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-carrying partial rinses, since during their implementation the items to be washed positioned in the rinsing chamber 7 are treated with a rinsing liquid S.
  • a treatment of the items to be washed with rinsing liquid S is generally not provided.
  • fresh water or feed water ZW is used as rinsing liquid S for treating the items to be washed, which is taken from a dishwasher-external water supply device WH, in particular a building-side drinking water line 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.
  • a rinsing liquid S formed from fresh feed water ZW is introduced at the beginning of each water-conducting partial rinse cycle, which rinse liquid is then discharged to the end of the respective rinse cycle to an external sanitation AR as wastewater AW.
  • the dishwasher 1 the FIG. 1 comprises a water inlet device 13, which is provided for connection to the external water supply device WH.
  • the external water supply device WH may be a faucet of a building water installation that provides pressurized inlet water ZW.
  • the water inlet device 13 comprises a connection piece 14 which is provided for connection to the water tap WH.
  • the connection can be made for example via a threaded arrangement, a bayonet arrangement or the like.
  • Downstream of the connecting piece 14 is a connecting line, in particular a connecting hose 15 is provided, which is preferably designed to be flexible.
  • the downstream end of the connection tube 15 is connected to a housing-fixed connection piece 16.
  • the downstream side of the housing-fixed connection piece 16 is connected in fluid-conducting manner to an input side of an inlet valve 17, which can be switched by means of the control device 2, of the water inlet device 13.
  • the inlet valve 17 may be formed as a switchable solenoid valve having only an open position and a closed position.
  • an external inlet valve in particular a so-called aqua stop valve can also be provided in the region of the connecting piece 14, which can preferably be switched by means of the control device 2, in particular shut-off and openable.
  • an output side of the inlet valve 17 is fluidly connected to a flow adjuster 18, which is intended to influence the inlet flow when the inlet valve 17 is open, ie the per unit time flowing amount of feed water ZW, at least in a nominal pressure range so that the inlet flow largely regardless of the pressure of the external water supply device WH.
  • the flow adjuster 18 operates automatically, in particular according to a mechanical principle, so that a control by the control device 2 is not required.
  • the flow setting device 18 may have a throttle body (not shown) which can be actuated by the feed water ZW for influencing the cross section through which the feed water flow can flow.
  • the throttle body can be mounted such that it can be deflected against the pressure of a spring by the pressure of the feed water from a rest position such that it reduces the flow-through cross section of the flow adjustment 18 as a function of pressure so that adjusts a quasi-constant supply water flow.
  • the influencing of the flow-through of the feed water flow cross-section can be effected by an elastic deformation of the throttle body.
  • the flow-through device can in particular also be part of the inlet-side inlet valve 17, in particular the Aquastop valve, i. be integrated in the inlet valve 17.
  • This may be different from the illustrated embodiment in particular coupled to the faucet WH, in particular screwed, i. it is connected in this advantageous embodiment variant as an external component directly to the faucet WH.
  • a backflow preventer 19 is provided, which is preferably designed as a pipe interruption 18 and which forms the downstream end of the water inlet device 13.
  • the non-return valve 19 serves to prevent a sucking back of liquids from the dishwasher 1, if a negative pressure is created in the external water supply device by dynamic processes. This prevents in particular that already used 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.
  • the pipe interruption 19 is assigned a leakage water outlet 20 which opens into the rinsing chamber 7.
  • An exit side of the pipe break 19 is connected to an input side of a softener 21.
  • a softener 21 In this way it is possible to soften the inlet water ZW received by means of the water inlet device 13 before it reaches the rinsing chamber 7 as soft water W via a water inlet 22 connected to the outlet side of the softening device 21.
  • the soft water W which has reached the rinsing chamber 7 via the water inlet 22 can now be used as rinsing liquid S.
  • the rinsing liquid S passes into a collection device 24 formed on a bottom 23 of the rinsing container 5, which can preferably be designed as a collecting pot.
  • An input side of a circulation pump 25 is liquid-conducting connected to the collecting pot 24.
  • an output side of the circulating pump 25 is connected to a spraying device 26, 27, which makes it possible to apply the washing material S introduced into the washing chamber 7 with washing liquid S.
  • the sprayer 26, 27 may comprise an upper rotatable spray arm 26 and a lower rotatable spray arm 27.
  • fixed and / or other movable spray elements could be provided.
  • the flushing liquid S emerging from the spraying device 26, 27 when the circulation pump 25 is switched on then passes back into the collection pot 24 due to its weight within the flushing chamber 24.
  • the circulating pump 25 can supply a sensor 28 Monitoring be assigned at least one operating parameter of the circulation pump 25.
  • the dishwasher 1 may conventionally have a metering device 29, which makes it possible to put the rinsing liquid S introduced into the rinsing chamber 7 with one or more cleaning agents and / or cleaning aids in order to improve the cleaning effect and / or the drying effect of a rinse cycle ,
  • the drainage device 30 comprises a drain pump 31, the inlet side of which is connected to the collection pot 24.
  • the outlet side of the drain pump 31, however, is connected to a housing-fixed connection 32 of the dishwasher 1.
  • a sewer pipe, in particular a waste water hose 33 is attached, which is preferably designed to be flexible.
  • a connecting piece 34 is arranged, which is intended to connect the drainage device 30 to a sewage disposal device AR.
  • the sanitation device AR can be, for example, a sewer pipe AR of a building-side water installation.
  • the connection between the connecting piece 34 and the sewage pipe AR can be designed as a screw connection, as a bayonet connection, as a plug connection or the like.
  • the dishwasher 1 has a data interface 35, via which information can be read from the control device 2 and / or entered into the control device 2.
  • the data interface 35 is arranged on the rear side of the dishwasher 1, so as to minimize impairment of the visual appearance of the dishwasher 1. But it could also be provided elsewhere.
  • FIG. 2 shows a block diagram of the household dishwasher 1 of FIG. 1 , wherein in particular the softening device 21 and the control and communication concept are shown in more detail.
  • the softening device 21 comprises a switching valve 36, a regenerant tank 37 and an ion exchanger 38.
  • the switching valve 36 may be a water switch, in particular a 3-way valve, which has one input and two outputs.
  • the water switch 36 makes it possible, in a first operating position A represented by a solid line, to supply the inlet water entering the pipe interruption 19 to the ion exchanger 38.
  • a second operating position B of the water switch 36 shown with a dotted line, the feed water entering via the pipe break 19 can be supplied to the regenerating agent tank 37, which can be filled with a regenerating agent RM.
  • the first operating position A of the filling of the washing chamber 7 with soft water W and the second operating position B of the maintenance of the ion exchanger 38 is used.
  • a signal line 39 is further provided, which connects the operating device 3 with the control device 2 such that operating commands of an operator from the operating device 3 to the control device 2 are transferable.
  • a signal line 40 is provided which the control device 2 connects to the output device 4, so that information provided by the control device 2 can be transmitted to the output device 4 and output there to the operator.
  • a control line 41 is provided, which connects the control device 2 with the switchable inlet valve 17 such that the inlet valve 17 can be closed or opened by the control device 2. In this way, the intake of feed water ZW can be controlled by the control device 2.
  • a further control line 42 connects the control device 2 with the circulation pump 25. In this way, the circulation of rinsing liquid S in the rinsing chamber 7 by the control device 2 is adjustable, in particular controllable or adjustable.
  • a signal line 43 is provided, which connects the sensor 28 with the control device 2.
  • the signal line 43 makes it possible to transmit information generated by the sensor 28 regarding the running properties of the circulating pump 25 to the control device 2.
  • the control device 2 is designed so that it can take into account this information from the sensor 28 in the circuit, in particular in the control of the closing and / or opening times, possibly also control or regulation of the inlet valve 17.
  • a control line 44 is provided, which connects the control device 2 with the drain pump 31, so that the drain pump 31 by the control device 2 switchable, in particular off and on, is.
  • a control line 45 is provided, which connects the control device 2 with the water diverter 36, so that the water diverter 36 can also be switched by the control device.
  • a preferably bidirectional data line 46 further enables information transmission between the control device 2 and the data interface 35.
  • a predetermined amount of feed water ZW is predefined on the basis of rinse-technological considerations, in particular on the basis of empirical values.
  • the inclusion of such a predetermined amount of feed water ZW is now carried out with a timed by the control device 2 feed sequence, in which the inlet valve 17 is opened for a time corresponding to a preset time is. Due to the largely independent of the pressure of the external water supply device WH setting the Zulaufwasserstroms means of the flow adjuster 18 here at least in the nominal pressure range, the absorbed amount of feed water ZW is substantially proportional to the opening duration of the inlet valve 17 and thus to the time value.
  • the amount of feed water ZW received during the opening period of the inlet valve 17 corresponds to the product of the opening duration and the feed flow or throughput which occurs. This, in turn, depends essentially on the permeability of the water inlet device 13 and, in this case, in particular on the permeability of the flow adjuster 18.
  • FIG. 3 shows a family of flow characteristics K, K ', K "identical water supply means 13 of household dishwashers 1 according to the FIGS. 1 and 2 ,
  • the pressure p of the feed water ZW supplying water supply device WH and on the ordinate of the adjusting Zulaufementstrom or water flow rate Q is shown on the abscissa.
  • a first exemplary flow characteristic K of a first water feed device 13 extends in a nominal pressure range NB of the flow setting device 18 substantially horizontally.
  • the nominal pressure range NB is understood to mean in particular the working range of the flow setting device 18, in which the flow characteristic K is within a predetermined tolerance range, for example within a tolerance range of +/- 10%, preferably +/- 5%, particularly preferably +/- 3%. around a mean inlet water flow QM runs.
  • the nominal pressure range NB preferably comprises at least the range from 1 bar to 6 bar, preferably from 0.75 bar to 8 bar, particularly preferably from 0.5 bar to 10 bar.
  • the named nominal pressure ranges NB ensure a wide range of application of the dishwasher 1. In particular, exact intake quantities of feed water ZW can be ensured even with larger pressure fluctuations of the external water supply device WH.
  • the flow characteristic K runs in a central region MNB of the nominal pressure range NB such that the feed water flow Q corresponds to the mean intake water flow QM.
  • the flow characteristic curve K continues to decrease with decreasing pressure p, so that the feed water flow Q drops below the mean intake water flow QM.
  • the flow characteristic K decreases increasingly more, so that can no longer be spoken by a quasi-constant supply water flow.
  • the flow characteristic curve K continues to increase with increasing pressure p, so that the feed water flow Q rises above the mean intake water flow QM. This is especially true in the range above an upper limit GD o of the nominal pressure range NB, so that even here can no longer speak of a quasi-constant supply water flow.
  • FIG. 3 a second exemplary flow characteristic K 'another water inlet device 13, for which the above applies analogously.
  • the further water inlet device 13 due to series variations on a modified flow characteristics.
  • the mean inlet water flow QM 'in the flow characteristic K' is significantly above the mean inlet water flow QM of the flow characteristic curve K.
  • FIG. 3 3 shows a third exemplary flow characteristic K "of a third water feed device 13 whose mean feed water flow QM" is significantly below the mean feed water flow QM of the flow characteristic curve K.
  • the individual characteristic curve K, K ', K "of the respective water feed device 13 can be taken into account, so that the amount of feed water ZW provided for receiving can be precisely maintained when the feed sequence is carried out Measurement of the characteristic Zulaufwasserstrom QC, QC ', QC "performed in the central region MNB of the nominal pressure range NB, since so very accurate filling quantities can be realized.
  • the characteristic Zulaufiganstrom or Wassmengen penficient QC, QC ', QC corresponds to an actual Zulaufiganstrom or inlet water flow rate of an individual water inlet device 13, which supplies at a connection to a water supply device WH, which supply water ZW in the nominal pressure range NB, with open inlet valve 17th
  • the respective characteristic feed water flow QC, QC ', QC can for example be automatically stored via the data interface 35 or manually via the operating device 3 in the control device 2.
  • the timer value can be determined externally and, for example, automatically stored in the control device 2 via the data interface 35 or manually via the operating device 3.
  • FIG. 4 shows exemplary temporal sequences basically similar rinses SG, SG ', SG "identical inventive dishwasher 1 of the embodiment on a common time axis T.
  • the rinse cycle SG comprises four water-carrying partial rinses, namely a pre-wash cycle VG, an intermediate rinse cycle ZG, a cleaning cycle RG and a Rinse cycle KG.
  • the wash cycle SG largely comprises a drying cycle TG in which intake of feed water ZW is not provided.
  • a curve Z17 is shown on the time axis t, which shows the operating state of the inlet valve 17.
  • the inlet valve 17 can assume an operating state "0", in which it is closed, and an operating state "1", in which it is open.
  • the water diverter 36 is switched by the control device 2 so that they are in the in FIG. 2 shown operating position A is located.
  • the soft water W is circulated as rinsing liquid S by means of the circulating pump 25 controlled by the control device 2 via the spray system 26, 27 so as to treat the items to be washed.
  • the rinse liquid S is pumped out by means of the drain pump 31 also controlled by the control device 2.
  • the supply valve 17 is continuously opened during the feed sequence Z 1 , so that the duration of the feed sequence Z 1 just corresponds to the opening time of the inlet valve 17.
  • it could be provided as part 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 17th opened several times and closed again.
  • the sum of the individual opening times of the inlet valve 17 corresponds to the time value ZV 1 , so that in this case too, the intended amount of inlet water ZW could be accommodated.
  • the rinse SG includes a maintenance sequence RV, DV for the maintenance of the ion exchanger 38.
  • the maintenance sequence RV, DV is also controlled automatically by the control device 2. It can be provided that the maintenance sequence is carried out only when the ion exchanger 38 is exhausted, d. H. if he has already taken so many hardeners that he can no longer sufficiently soften the additional inlet water ZW to be absorbed.
  • the control device 2 may comprise a counter which determines the total amount of the amount of feed water ZW, possibly over a plurality of rinse cycles, by means of the feed sequences Z performed. From this and from the degree of hardness of the available feed water ZW, the controller 2 can then determine whether the ion exchanger 38 still has a sufficient softening capacity or whether it must be maintained. It can be provided that the counter is reset after maintenance.
  • the degree of hardness of the feed water ZW can for example be input via the operating device 3 and stored in the control device 2.
  • rinse SG has been determined by the controller 2 that a maintenance sequence RV, DV for servicing the ion exchanger 38 is required.
  • this comprises a regeneration process RV and a purging process DV, the regeneration process RV being carried out during the cleaning cycle RG and the purging process DV between the cleaning cycle RG and the intermediate rinse cycle ZG.
  • the maintenance sequence RV, DV could also be integrated in another way in the sequence of General Touch réelle VG, RG, ZG, KG, TG. For example, it could also be carried out at the end or after the end of the respective dishwashing program.
  • a feed sequence Z 3 for receiving the amount of feed water ZW required for the regeneration process RV is automatically carried out by the control device 2.
  • the inflow valve 17 is opened during the inflow sequence Z 3 of the regeneration process RV for a period of time which corresponds to a predetermined time value ZV 3 .
  • the timing value ZV 3 is also taking into account the characteristic Zulaufwasserstrom QC, as to the hand FIG. 3 has been determined, so that the intended for the regeneration process RV amount of feed water ZW, which may be significantly smaller than that for a water-bearing Opera
  • RG, ZG, KG can be recorded with high accuracy.
  • the regenerating brine remains in the ion exchanger 38 until the beginning of the rinsing process DV, thereby taking on the hardness constituents attached there, so that the ion exchanger 38 again acquires a capacity for softening feed water ZW.
  • a flushing process DV is now provided, at the beginning of which a feed sequence Z 4 for receiving the amount of feed water ZW required for the flushing process DV is automatically carried out by the control device 2.
  • a feed sequence Z 4 for receiving the amount of feed water ZW required for the flushing process DV is automatically carried out by the control device 2.
  • the control device 2 During the für Cyprusvorgangs DV water diverter 36 is switched back to its operating position A, so that the recorded feed water ZW flushes out the regenerating brine located in the ion exchanger 38.
  • the regenerating brine which reaches the rinsing chamber 7 via the water inlet 22 during the flushing process DV can then be pumped out by means of the brine pump 31.
  • the inlet valve 17 is opened for a period corresponding to another timing value ZV 4 , which has also been determined taking into account the characteristic Zulaufwasserstrom QC, so that provided for the für Cyprusvorgang DV amount of feed water ZW with high accuracy can be recorded.
  • ZV 4 another timing value
  • the second in the FIG. 4 shown rinse SG ' corresponds to the above-described rinse SG.
  • the water inlet device 13 of the dishwashing machine 1 used in this case has the in FIG. 3 shown characteristic K 'on. Therefore, the measurement performed in advance results in a higher characteristic inflow or throughput QC '.
  • rinse SG corresponds to the above-described rinse SG.
  • water inlet device 13 of the used here Dishwasher 1 in the FIG. 3 This results in the previously performed measurement a smaller characteristic inlet flow or throughput QC ".
  • the invention particularly relates to a dishwasher, which 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 nominal 2.5 1 / min.
  • a preliminary measurement or a type of calibration of the filling valve is carried out with regard to its characteristic throughput behavior, preferably at the factory or by the factory customer service, eg in the case of maintenance or delivery of the respective dishwasher.
  • the filling valve or inlet valve is representative of one or more other components of the water inlet device of the dishwasher or the entirety of the water inlet device.
  • the characteristic, actual throughput of this valve is measured by means of an external, in particular factory measuring device, preferably in the nominal pressure range of the respective existing external water supply.
  • this measured throughput which describes 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.
  • 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.
  • a plurality of preset time values which in particular correspond to different feed water quantities, with the aid of the individual flow rate value or characteristic inflow water flow measured in the nominal pressure range or in a corresponding manner to calculate and store in the controller.
  • different Timing values correspond by measuring the actual flow behavior of the respective valve different intake water flow rate actual values. Possibly. It may also be expedient if a plurality of throughput values of the respective inlet valve are respectively measured beforehand for different operating points, ie pressures in the nominal pressure range of the respective external water supply, ie, a plurality of individual throughflow water flows are determined in advance.
  • a mean throughput value can be formed in the nominal pressure range for the respective inlet valve and used for the definition of different time specification values which correspond to specific inflow water quantities.
  • one or more throughput values or feed water flows can also be determined beforehand for pressures above and / or below the nominal pressure range, which represent the actual throughput behavior of the respective inlet valve in these edge regions above and below the nominal pressure range.
  • the respective characteristic feed water flow or throughput is expediently deposited in the control device of the dishwasher. Possibly.
  • the functional relationship of a plurality of determined Zulaufwasserstrom - or inlet water flow rates of the respective valve can also be represented by a mathematical relationship such as by a mathematical function or by a table.
  • one or more timeout values can be determined for these one or more throughput values which result for the desired inflow water quantities which are to actually reach the dishwasher as actual feed quantities from the respective quotient formation of respectively desired feed quantity and respective throughput value.
  • the one or more determined throughput values and / or the timeout values resulting therefrom at different desired feed water quantities are advantageously used during operation of the respective dishwasher as control parameters for supply control of the actual amount of liquid actually entering through the inlet valve.
  • the actual amount of feed water actually entering the dishwasher can be metered, ie supplied in a controlled manner in a defined manner. Because each time value is then a specific Zulaufigange, which actually flows into the dishwasher through the inlet valve as a function of its throughput characteristic, assigned in a defined manner.
  • this pre-measurement of the inlet valve and the associated derivation and storage of one or more control parameters can also be used for one or more other components of the water inlet device or for the entire water inlet device. In the latter case, therefore, the real throughput behavior of the entire water inlet device to be installed in the respective dishwasher is determined and taken into account by one or more control parameters as indicated above for the inlet valve.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP11158656.6A 2010-04-14 2011-03-17 Lave-vaisselle doté d'un dispositif d'amenée d'eau Withdrawn EP2377450A3 (fr)

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DE102010027754A DE102010027754A1 (de) 2010-04-14 2010-04-14 Geschirrspülmaschine mit einer Wasserzulaufeinrichtung

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CN114947675A (zh) * 2021-02-22 2022-08-30 青岛海尔洗碗机有限公司 用于洗碗机的节水控制方法及洗碗机

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ITTO20120082A1 (it) * 2012-02-01 2013-08-02 Elbi Int Spa Componente per l'alimentazione di un liquido in pressione nella vasca di lavaggio di una macchina lavatrice, in particolare per una lavastoviglie.
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CN114947675A (zh) * 2021-02-22 2022-08-30 青岛海尔洗碗机有限公司 用于洗碗机的节水控制方法及洗碗机

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DE102010027754A1 (de) 2011-10-20

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