EP2420174A2 - Lave-vaisselle doté d'une séquence de vidange améliorée - Google Patents

Lave-vaisselle doté d'une séquence de vidange améliorée Download PDF

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Publication number
EP2420174A2
EP2420174A2 EP11176779A EP11176779A EP2420174A2 EP 2420174 A2 EP2420174 A2 EP 2420174A2 EP 11176779 A EP11176779 A EP 11176779A EP 11176779 A EP11176779 A EP 11176779A EP 2420174 A2 EP2420174 A2 EP 2420174A2
Authority
EP
European Patent Office
Prior art keywords
pumping
dishwasher
rinsing
pump
drain pump
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.)
Granted
Application number
EP11176779A
Other languages
German (de)
English (en)
Other versions
EP2420174A3 (fr
EP2420174B1 (fr
Inventor
Helmut Jerg
Andreas Reiter
Michael Georg Rosenbauer
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
Priority to PL11176779T priority Critical patent/PL2420174T3/pl
Publication of EP2420174A2 publication Critical patent/EP2420174A2/fr
Publication of EP2420174A3 publication Critical patent/EP2420174A3/fr
Application granted granted Critical
Publication of EP2420174B1 publication Critical patent/EP2420174B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/0031—Water discharge phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L2401/09—Water level
    • 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
    • A47L2501/02—Water discharge, e.g. opening or closure of discharge 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
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the present invention relates to a dishwasher, in particular a domestic dishwasher, with a control device for performing a rinse for cleaning items by a selectable wash program and with an adjustable by the controller, in particular controllable or adjustable, drain pump for pumping rinsing liquid from the dishwasher.
  • the object of the present invention is to provide a dishwasher, in particular a domestic dishwasher, in which an undesirable staining on the cleaned dishes is reduced.
  • the object is achieved in a dishwasher of the type mentioned in that at least one rinsing program is selected in which at least one automatic pumping sequence takes place, which comprises at least three Abpumpphasen during which the drain pump is turned on, between successive Abpumpphasen the at least three Abpumpphasen is provided in each case a break, during which the drain pump is turned off.
  • the dishwasher according to the invention has a control device for the automatic control of operating sequences of the dishwasher.
  • the control device can be designed as so-called sequence control, in particular as electronic sequence control.
  • At least one rinse program for performing or controlling a rinsing process also called rinse cycle, for rinsing items to be washed, in particular for rinsing dishes, deposited.
  • a rinsing process also called rinse cycle
  • rinsing programs are provided, one of which can be selected and started by the operator. This makes it possible to adjust the course of a wash cycle, in particular to the load, to the type of load, to the degree of soiling of the items to be washed and / or to the desired duration of the wash cycle.
  • the respectively deposited washing programs can preferably be designed such that the wash cycle controlled in each case by the wash program has several partial wash cycles, in particular at least one pre-wash cycle for pre-cleaning wash items, at least one wash cycle for thorough cleaning of wash ware, at least one intermediate wash cycle for removing soiled wash liquid from the ware, at least one rinse cycle to avoid stains on the items to be washed and / or to prepare a drying step or drying cycle, and / or at least one drying cycle for drying the items to be washed, in the above-mentioned time sequence.
  • Rinse cycle, cleaning cycle, intermediate rinse cycle and rinse cycle are referred to as water-carrying partial rinses, since during their implementation, the introduced into the rinsing chamber items to be treated with a rinsing liquid. During the drying cycle, a use of rinsing liquid is usually not provided.
  • the treatment of the items to be washed with rinsing liquid can take place in a substantially complete rinsing chamber, in particular a rinsing container, of the dishwasher.
  • the flushing chamber may be associated with an inlet valve, which allows to fill flushing liquid in the washing chamber.
  • the rinsing chamber may be associated with a circulating pump for circulating a rinsing liquid, which allows the rinsing liquid filled into the rinsing chamber, for. B. from a collection device for rinsing liquid, and apply via a rinsing chamber associated spray system on the dishes.
  • a rinsing liquid is understood here to mean, in particular, a liquid which is intended to be applied to the ware in order to clean it and / or to treat it in another way.
  • the rinsing liquid can also be provided for heating the items to be washed, which is possible, for example, during a rinsing step in order to carry out a subsequent drying cycle prepare in which the drying is based at least partially on the fact that the washing liquid adhering to the items to be washed evaporates due to the heat stored in the items to be washed.
  • the rinsing liquid entering the rinsing chamber via the inlet valve is usually fresh water.
  • the rinsing liquid in the rinsing chamber can be enriched with cleaning agents, with cleaning auxiliaries, such as, for example, rinse aid and / or with dirt that has been removed from the items to be washed. But there are also cases conceivable in which already enriched water is filled as flushing liquid via the inlet valve in the washing chamber.
  • the rinsing chamber is associated with a drain pump for pumping out rinsing liquid.
  • the drain pump makes it possible, no longer needed, especially heavily soiled, located in the washing chamber rinsing liquid z. B. from the collection device for rinsing fluid and z. B. to deliver a building-side installed sanitation.
  • the drain pump is controlled and / or regulated during the execution of a wash cycle by the control device of the dishwasher, depending on the particular selected wash program. It can be provided in particular that at the end of a water-carrying section Whygangs each flushing liquid used is pumped out to fill in the subsequent partial wash a possibly unpolluted or less polluted flushing liquid in the washing chamber and to use for cleaning the dishes.
  • the drain pump is designed as a centrifugal pump, in particular as a radial pump, as a semi-radial pump or as an axial pump.
  • a centrifugal pump is a turbomachine in which the respective liquid is conveyed by using the centrifugal force by means of a rotating conveyor element.
  • the design of the drain pump as a centrifugal pump leads, better or different than, for example, in an embodiment as a piston pump to the fact that the function of the drain pump is also ensured when the rinsing liquid to be pumped is heavily contaminated.
  • the amount of rinsing fluid in the dishwasher initially drops substantially linearly over time as the speed remains constant.
  • the pressure for conveying rinsing liquid collapses and consequently no rinsing liquid is promoted more. In this way, remains in the continuous operation of the drain pump not pumpable residual amount of washing liquid in the dishwasher.
  • the dirt content and / or the cleaning agent content of the last rinsing liquid used in a rinse can be reduced, which reduces staining on the cleaned items to be washed.
  • the cleaned ware thus receives, especially when it comes to cutlery or glassware, a special shine.
  • the first of the Abpumpphasen is provided for pumping of at least 80%, preferably of at least 90%, more preferably of at least 95%, of the total amount of rinsing liquid to be pumped. This makes it possible to effectively reduce the residual amount of washing liquid remaining in the dishwasher by means of the subsequent pumping phases.
  • the first pumping-down phase of the pumping-down phases is provided for pumping out an amount of flushing liquid which can be pumped off during continuous operation of the drainage pump.
  • the subsequent pump-down phases it is possible by means of the subsequent pump-down phases to reduce the residual amount of washing liquid remaining in the dishwasher in a particularly effective manner.
  • a monitoring device for monitoring a rinsing fluid flow conveyed by the lye pump, wherein a termination of the first pumping down phase of the pumping down phases is provided if the monitoring device detects that the minimum rinse fluid flow has been undershot. If a minimum value for the amount of flushing liquid pumped out per unit of time is reached, that is to say for the conveyed flushing liquid flow, this indicates that the amount of flushing liquid which can be pumped off during continuous operation of the drainage pump is essentially pumped out.
  • the termination of the first pump-down phase is initiated on the basis of this criterion, then it can be ensured that the amount of flushing liquid that can be pumped off in the first pumping step is at least substantially reached, and that, on the other hand, an unnecessary duration of the first pumping-off phase is avoided.
  • the drain pump has an electric motor, wherein the monitoring unit is designed to monitor at least one electrical operating parameter of the electric motor.
  • the monitoring unit is designed to monitor at least one electrical operating parameter of the electric motor. This is based on the finding that electrical operating parameters of electric motors of lye pumps change in a characteristic manner depending on the conveyed rinsing liquid flow. This applies, for example, in a running with a fixed voltage drain pump for their power or power consumption.
  • the power consumption of an air-sucking lye pump is generally well below the power consumption of a solely rinsing liquid-sucking lye pump.
  • Such a monitoring unit is simple in this case. This is especially true in comparison to monitoring devices which have a special flow meter, such as an impeller counter.
  • a termination of the first pump-down phase of the pump-down phases is provided if, by means of the monitoring device, no drop below the minimum value for the flushing liquid flow is determined after a predetermined period of time has elapsed. In this way it can be prevented that in the case of a malfunction of the monitoring device, the first Abpumpphase is continued indefinitely.
  • a termination of at least one of the pumping phases following the first pumping phase and / or at least one of the pauses is timed.
  • At least one of the pauses has a duration of at least 1 second, preferably of at least 2 seconds, more preferably at least 4 seconds and / or at most 24 seconds, preferably at most 12 seconds, more preferably at most 7 seconds.
  • the specified minimum values for the duration of the pauses are normally sufficient for the rinsing fluid stirred up in the preceding pumping phase to reach a rest position during the respective pause during which at least a short-term pressure build-up is possible due to the start-up of the lye pump.
  • the specified maximums will further ensure that the entire pumping sequence does not take longer than necessary.
  • At least one of the pumping phases following the first pumping phase has a duration of at least 1 second, preferably at least 2 seconds, more preferably at least 4 seconds, and / or at most 32 seconds, preferably at most 16 seconds, more preferably of at most 8 seconds.
  • the amount of flushing fluid which can additionally be pumped off at the start of the drain pump can generally be achieved in each of the subsequent pumping phases. The specified maximums will further ensure that the entire pumping sequence does not take longer than necessary.
  • At least one rinsing program for carrying out a rinse cycle can be selected, in which case the pumping sequence is provided at the end of a partial rinse cycle provided as an intermediate rinse cycle.
  • a reduction in the non-pumped amount of rinsing liquid leads to a reduction of carryover of detergent and / or dirt in the last rinse a rinse, which is usually the rinsing liquid formed as a rinse cycle Claus istgangs.
  • the gloss effect on rinsed dishes can be increased particularly effective.
  • At least one rinsing program for carrying out a rinse cycle can be selected, in which case the pumping sequence is provided at the end of a partial rinse cycle intended as a cleaning aisle is.
  • a carry-over of cleaning agent and / or dirt in an intermediate rinse cycle can generally already be prevented, so that the rinse liquid contains less cleaning agent and / or dirt in this intermediate rinse cycle.
  • further carryover of cleaning agent and / or dirt into the last rinsing liquid of a rinse cycle can be further minimized and the luster effect on the rinsed items to be rinsed can be increased.
  • At least one rinsing program for carrying out a rinse cycle can be selected, in which a short rinsing sequence is provided at the end of a partial rinse cycle intended as a pre-rinse, which comprises less pumping phases than the pumping sequence.
  • a short rinsing sequence is provided at the end of a partial rinse cycle intended as a pre-rinse, which comprises less pumping phases than the pumping sequence.
  • At least one rinsing program for carrying out a rinse cycle can be selected, in which a short rinsing sequence is provided at the end of a partial rinse cycle provided as a rinse cycle which comprises less pumping phases than the pumping sequence.
  • the rinse liquid used is substantially free of detergent and / or dirt. Therefore, a carryover of detergent and / or dirt in a later rinse at best to a small extent possible and not disturbing. Therefore, at the end of a rinse cycle can be pumped without a disadvantage with a Kurzabpumpsequenz, which further accelerates the execution of the rinse cycle.
  • the drain pump comprises a brushless electric motor, preferably a brushless permanent magnet motor.
  • the brushless electric motor can be called in particular as a brushless DC motor, also called a BLDC motor, as a brushless AC motor, also called a BLAC motor, or as a synchronous motor.
  • the rotor of the motor can have at least one permanent magnet, whereas the stator has a plurality of electromagnets.
  • the electromagnets are commutated via a control electronics.
  • a defined starting of the engine from standstill can be achieved, so that the pumpable amount of flushing liquid which can be pumped into the pumping phases following the first pumping phase can be maximized.
  • a circulation pump for applying washware with rinsing liquid is switched off during the entire duration of the Abpumpsequenz. This prevents that rinsing liquid is distributed during the Abpumpsequenz by the circulation pump in the dishwasher, so that they can not be pumped by means of the drain pump.
  • the invention also relates to methods for operating a dishwasher, in particular a domestic dishwasher, with a control device for controlling rinses on the basis of a selectable washing program and adjustable by the control device, in particular controllable or adjustable drain pump for pumping rinsing liquid from the dishwasher.
  • a rinsing program is selected in which at least one Abpumpsequenz is automatically carried out, which comprises at least three Abpumpphasen for the duration of the drain pump is turned on, between each successive Abpumpphasen the at least three Abpumpphasen is provided in each case a break for the duration of the drain pump off becomes.
  • the method according to the invention makes it possible to reduce the formation of stains on the cleaned dishes.
  • 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. Expediently, a plurality of washing programs are stored, so that by selecting a suitable washing program, the sequence of a controlled by the control unit 2 rinse, for example, to the load, to the type of load, to the degree of contamination of the dishes and / or to the desired duration of the wash can be adjusted.
  • the control device 2 is associated with an operating device 3, which allows an operator of the dishwasher 1 to call one of the washing programs and thereby start.
  • the control device 2 is associated with an output device 4, which allows the output of messages to the operator.
  • the output device 4 can be used to output z.
  • optical messages indicator lights LEDs, an alphanumeric display and / or a graphical display include.
  • the output device 4 may additionally or independently of the optical display for the output of acoustic messages comprise a buzzer, a loudspeaker and / or the like.
  • 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 / or 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 variant, the control device may possibly also be accommodated in a base module below the washing compartment.
  • the control device 2 could also be designed decentralized, which is understood to include spatially separated components, which are connected via communication means such that they can cooperate.
  • the dishwasher 1 has for positioning items to be washed or dishes, an upper dish rack 9 and a lower dish rack 10.
  • 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. When the door 6 is open, 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.
  • the one or more stored in the control device 2 washing programs can each provide several Operalustruderie, for example in this time sequence at least one pre-wash, 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, which can be taken up by an external water supply device WH, in particular a drinking water supply network, and filled into the rinsing chamber 7 of the rinsing container 5.
  • an external water supply device WH in particular a drinking water supply network
  • a rinsing liquid S formed from fresh feed water ZW is introduced at the beginning of each water-carrying partial rinse cycle, which is then discharged to the end of the respective rinse cycle to an external sanitation AR as wastewater AW.
  • a rinsing liquid S a Clausillongangs e.g. Store in a reservoir, not shown, and refill in a later partial rinse cycle in the rinsing chamber 7.
  • the dishwasher 1 the FIG. 1 comprises a water inlet device 13, which is provided for connection to the external water supply device WH. As in FIG. 1 it can be at the external water supply WH to a faucet WH of a building-side water installation act, the pressurized inlet water ZW provides.
  • 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.
  • a connection 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.
  • a supply line 17 Downstream of the housing-fixed connecting piece 16, a supply line 17 is provided, which is connected to an input side of a switchable by means of the control device 2 inlet valve 18. An output side of the inlet valve 18 in turn is connected to a liquid inlet 19 of the rinsing chamber 7. In this way, it is possible, by means of the water inlet device 13, to feed feed water ZW as dishwashing liquid S into the interior of the dishwashing chamber 7 of the dishwasher 1.
  • the inlet valve 18 may be formed as a switchable solenoid valve, which has only an open position and a closed position.
  • a water treatment system not shown, for example, a water softening system may be provided in the supply line 17, a water treatment system, not shown, for example, a water softening system may be provided.
  • an external inlet valve in particular a so-called aqua-stop valve, which is preferably switchable by means of the control device, in particular lockable and open.
  • the rinsing liquid S introduced into the rinsing chamber 7 via a liquid inlet 19 passes into a collecting device 21 which is formed on a base 20 of the rinsing container 5 and which can preferably be designed as a collection pot 21.
  • a circulating pump 22 is connected with its inlet 23 fluid-conducting with the collecting pot 21.
  • an output side of the circulation pump 22 via a preferably electric heater 24 for heating rinsing liquid S with a spray device 25, 26 is connected, which makes it possible to apply the introduced into the rinsing chamber 7 items with optionally heated rinsing liquid S.
  • the sprayer 25, 26 includes an upper rotatable spray arm 25 and a lower rotatable spray arm 26.
  • fixed spray elements or other spray devices may be provided.
  • the flushing liquid S emerging from the spraying device 25, 26 when the circulating pump 22 is switched on is returned to the collecting pot 21 due to its weight within the flushing chamber 21.
  • the circulating pump 22 is intended to be operated in a concentricity.
  • the circulating pump 22 is then in the concentricity when its inlet 23 is completely filled with flushing liquid S in cross section, so that exclusively flushing liquid S, or in other words, no air enters the interior of the circulation pump 22.
  • a concentricity monitoring unit 27 In order to determine whether or not the circulation pump 22 is in concentricity, it is assigned a concentricity monitoring unit 27. This can be provided as a separate component or possibly also be part of the control device 2. If, during the circulation of rinsing liquid by means of the concentricity monitoring unit 27, a non-circular run of the circulating pump 22 is detected, then additional rinsing liquid S can be introduced into the collecting device 21 by opening the inlet valve 18, so that the level of rinsing liquid S in the collecting device 21 increases the circulation pump 22 thereby passes into the concentricity.
  • the dishwasher 1 in a conventional manner to a metering device 28, which makes it possible to put the rinsing liquid S introduced into the rinsing chamber 7 with cleaning agents in powder form and / or liquid form to improve the cleaning effect of a rinse cycle.
  • a further metering device 29 also makes it possible to provide the rinsing liquid S with, in particular, liquid rinse aid, in order in particular to avoid staining on the cleaned items to be washed and to increase a drying effect of a rinse cycle.
  • the drainage device 30 includes a drain pump 31, the inlet 32 is connected to the collecting pot 21.
  • the outlet side of the drain pump 31, however, is connected via a non-return valve 33 to a connecting line 34, the downstream end of which is connected to a housing-fixed connection 35 of the dishwasher 1.
  • a waste water hose 36 is attached, which is flexible.
  • a fitting 37 is arranged, which is intended to connect the drainage device 30 with a sanitation AR.
  • the sanitation device AR can be a sewer pipe AR of a building-side water installation.
  • the connection between the connecting piece 36 and the sewage pipe AR can be designed as a screw connection, as a bayonet connection, as a plug connection or the like.
  • rinsing liquid S in particular polluted rinsing liquid S
  • the non-return valve 33 which may be formed as a check valve 33, for example, already from Collecting device 21 pumped out flushing liquid S and / or from the sanitation AR originating liquid passes through their weight and / or by pressure fluctuations in the sanitation AR into the collection device 21.
  • the drain pump 31 is preferably a monitoring device 38 for monitoring a per unit time promoted amount of flushing fluid S, ie for monitoring the funded Spülillonkeitsstroms assigned.
  • the monitoring device 38 makes it possible to detect, for example, when the level of flushing liquid S in the collecting device 21 has dropped so far during the pumping of rinsing liquid S from the collecting device 21 that no rinsing liquid S is conveyed any longer.
  • the drain pump 31 has an electric motor, wherein the monitoring unit 38 is designed in particular for monitoring at least one electrical operating parameter of the electric motor.
  • the monitoring unit 38 is designed in particular for monitoring at least one electrical operating parameter of the electric motor. This is based on the finding that electrical operating parameters of electric motors of lye pumps 31 in dependence on the promoted Spülillonkeitsstrom change characteristically. This applies, for example, in a running with a fixed voltage drain pump for their power or power consumption. Thus, for a given speed, the power consumption of an air-sucking lye pump is generally well below the power consumption of a solely rinsing liquid-sucking lye pump 31.
  • Such a monitoring unit 38 is of simple construction. This is especially true in comparison to monitoring devices which have a special flow meter, such as an impeller counter.
  • the electric motor of the drain pump 31 may in particular be a brushless electric motor, preferably a brushless permanent magnet motor.
  • the brushless electric motor can be called in particular as a brushless DC motor, also called a BLDC motor, as a brushless AC motor, also called a BLAC motor, or as a synchronous motor.
  • the rotor of the motor can have at least one permanent magnet, whereas the stator has a plurality of electromagnets.
  • the electromagnets are commutated via a control electronics. In comparison with other possible engine concepts, a defined starting of the engine from standstill can be achieved, so that the pumpable amount of flushing liquid which can be pumped into the pumping phases following the first pumping phase can be maximized.
  • the dishwasher 1 comprises the FIG. 1 a Sorptionstrockenvorraum 39 shown only schematically, which makes it possible to guide air in a circuit via a sorption column, not shown, via an opening 40 in the rinsing chamber 7 and to take over a further opening 41 from the rinsing chamber 7 to re-them on the Lead sorption.
  • moisture in the air settles on the sorption column, so that the air is dehumidified.
  • the air is also heated, so that the introduced into the rinsing chamber 7 air is dry and warm.
  • the sorption drying device 39 is in particular provided to dry the items to be washed in a drying sequence by means of the dried and heated air during a drying cycle of a rinse cycle.
  • the sorption column In order to remove the moisture accumulated on the sorption column, the sorption column is provided with a heater, not shown, by means of which the sorption column during a regeneration sequence is heated so that the moisture dissolves again from the sorption column.
  • the regeneration sequence can be carried out in particular during a cleaning cycle of a rinse cycle, in which case the waste heat of the regeneration sequence for heating a rinsing liquid of the cleaning cycle can be used, which lowers the energy requirement of the heating device 24 associated with the circulation pump 22.
  • FIG. 2 shows a block diagram of the household dishwasher 1 of FIG. 1 , where in particular their control and communication concept is shown there.
  • a signal line 42 is provided, which connects the operating device 3 to the control device 2 such that operating commands of an operator can be transmitted from the operating device 3 to the control device 2.
  • a signal line 43 is provided, which connects the control device 2 to the output device 4, so that information provided by the control device 2 can be transmitted to the output device 4 and output there to the operator.
  • a control line 44 is provided, which connects the control device 2 with the switchable inlet valve 18 such that the inlet valve 18 can be closed or opened by the control device 2. In this way, the filling of rinsing liquid S in the rinsing chamber 7 can be controlled by the control device 2.
  • a further control line 45 connects the control device 2 with the circulation pump 22. As a result, 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 46 is provided, which connects the concentricity monitoring unit 27 with the control device 2.
  • the signal line 46 makes it possible to transmit information generated by the concentricity monitoring unit 27 with respect to the running properties of the circulation pump 22 to the control device 2.
  • the control device 2 is designed so that it can take into account this information from the concentricity monitoring unit 27 in the circuit, in particular in the control of the closing and / or opening times, possibly also control or regulation of the inlet valve 18.
  • the concentricity monitoring unit 27 may be formed in particular as a functional component of the control device 2.
  • a control line 47 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, optionally also controllable or adjustable, is.
  • a further signal line 48 connects the monitoring device 38 associated with the drain pump 31 with the control device 2 in such a way that information generated by the monitoring device 38 can be taken into account by the control device 2 during the execution of rinse cycles.
  • Another control line 49 connects in the embodiment, the control device 2 with the circulating pump 22 associated heating device 24 such that the heater 24 can be used in the course of a rinse cycle by the control device 2 as needed.
  • control device 2 Via a further control line 50, which connects the control device 2 and the sorption drying device 39, it is also possible for the control device 2 to control and / or regulate the operation of the sorption drying device 39.
  • the addition of cleaning agent to a rinsing liquid can also be influenced by the control device 2 via a further control line 51 which connects the control device 2 and the dosing device 28.
  • the addition of cleaning agent to a rinsing liquid can be influenced by the control device 2 via a further control line 52 which connects the control device 2 and the dosing device 29.
  • FIG. 3 shows an exemplary rinse SG of the dishwasher 1 according to the invention, which causes a special gloss effect on cleaned ware by a lower carryover of dirt and / or detergent in the last used rinse liquid S.
  • the rinse cycle SG comprises a plurality of partial rinses, namely a pre-rinsing cycle VG for pre-cleaning items to be washed, a cleaning cycle RG for thorough cleaning of items to be washed, an intermediate rinse ZG for removing soiled rinsing liquid in the following time sequence S of the items to be washed, a rinse KG to avoid stains on the items to be washed and a drying cycle TG for drying the items to be washed.
  • a pre-rinsing cycle VG for pre-cleaning items to be washed
  • RG for thorough cleaning of items to be washed
  • an intermediate rinse ZG for removing soiled rinsing liquid in the following time sequence S of the items to be washed
  • a rinse KG
  • a filling sequence F 1 for filling the rinsing chamber 7 with rinsing liquid S is carried out.
  • the filling valve 18 is temporarily opened in the embodiment.
  • a Umicalzsequenz U 1 is carried out, in which the items to be washed with circulated flushing liquid S is applied.
  • the circulating pump 31 is switched on at least temporarily during the circulation sequence U 1 .
  • an exhaust pumping sequence A 2 which is also described in more detail below, is carried out at its end, which is characterized in that a non-pumpable residual amount of rinsing liquid S is reduced compared to the short pumping sequence KA 1 . In this way, carryover of dirt and / or cleaning agent into the intermediate rinse ZG carried out subsequently is reduced.
  • the intermediate rinse ZG comprises a further filling sequence F 3 for filling the rinsing chamber 7 with rinsing liquid S and a further circulating sequence U 3 , which essentially serves for rinsing off residues of the rinsing liquid S of the rinsing RG from the items to be washed.
  • the interfering residues can be removed particularly well, since a particularly clean rinsing liquid is available due to the almost complete pumping out of the rinsing liquid S of the cleaning cycle R in the intermediate rinse cycle ZG.
  • the rinsing liquid S of the intermediate rinse ZG also takes on only little dirt and / or detergent during the intermediate rinse, so that the rinsing liquid S at the end of the intermediate rinse ZG is much cleaner than would be the case if carried out at the end of the cleaning cycle RG a Kurzabpumpsequenz would have been.
  • an exhaust pumping sequence KA 3 is now carried out, which is likewise distinguished by the fact that a non-pumpable residual quantity of rinsing liquid S is reduced compared to the short pumping sequence KA 1 .
  • carry-over of dirt and / or cleaning agent into the rinse cycle KG is further reduced from the already relatively clean rinsing liquid S of the intermediate rinse Z.
  • rinsing liquid S filled by means of a further filling sequence F 3 is circulated in a circulating sequence U 4 .
  • the addition ZK of rinse aid for example via the metering device 29, is provided in order to reduce the surface tension of the rinsing liquid S.
  • the rinsing liquid S runs better from the items to be washed, which serves in a known manner to avoid stains on items to be washed.
  • the last rinsing liquid S of the rinse SG in the embodiment the rinsing liquid of the rinse cycle KG, contains much less dirt and / or detergent, so that the staining on the cleaned items to be further reduced.
  • the rinsing liquid of the rinse cycle KG can easily be carried out by means of a further short pumping sequence KA 4 , since due to its low content of dirt and / or cleaning agent a substantial carryover of dirt and / or detergent into a subsequent rinse SG is generally not possible.
  • the items to be washed are dried in the exemplary embodiment by means of dry-warm air of the sorption drying apparatus 39 during a drying sequence T 5 .
  • the rinsing liquid S used there could be heated by means of a heating phase not provided in the exemplary embodiment.
  • the circulation pump 22 is switched off in each case. This prevents that rinsing liquid S is distributed during the Abpumpsequenzen A 2 and A 3 and the Kurzabpumpsequenzen KA 1 and KA 4 by the circulation pump 22 in the dishwasher 1, so that they can not be pumped by the drain pump 31.
  • FIG. 4 shows a schematic representation of an Abpumpsequenz A of the dishwasher according to the invention the FIGS. 1 and 2 which the in FIG. 3 shown Abpumpsequenzen A 2 and A 3 corresponds.
  • the amount M in% of the amount of flushing liquid S still present in the flushing chamber 7 is shown in relation to the amount at the beginning of the pumping sequence A over time t.
  • This amount M can also be referred to as the relative amount M.
  • the operating state Z31 of the drain pump 31 is shown.
  • the operating state "1" means that the drain pump 31 is switched on
  • the operating state "0" means that the drain pump 31 is switched off.
  • the Abpumpsequenz A comprises three Abpumpphasen AP 1 , AP 2 and AP 3 , during which the drain pump 31 is turned on continuously. Furthermore, pauses P 1 , and P 2 are provided, during which the circulation pump 31 is switched off continuously.
  • the pumping-down phase AP 1 is separated from its neighboring pumping-down phase AP 2 by a break P 1, and this in turn is separated from its neighboring pumping-down phase AP 3 by a pause P 2 .
  • the drain pump 31 may in particular be designed as an electric centrifugal pump, for example as a radial pump, as a semi-radial pump or as an axial pump.
  • the relative amount M of the rinsing fluid S in the dishwasher 1 initially drops substantially linearly over time as the rpm of the lye pump 31 remains constant.
  • a certain residual amount RMD of rinsing liquid S at time T1 such an amount of air enters the circulation pump 31, so that the pressure for conveying rinsing liquid S collapses and consequently no rinsing liquid S is more promoted.
  • This state can be determined by means of the monitoring device 38, for example, based on a monitoring of an electrical parameter of the drain pump 31, wherein then the first pumping AP 1 can be stopped.
  • the first pumping phase AP 1 is ended when, by means of the monitoring device 38, the minimum value for the flushing liquid flow has not been determined after a predetermined period of time has elapsed. In this way it can be prevented that in the event of a malfunction of the monitoring device 38, the first pumping phase AP 1 is continued indefinitely.
  • this effect also occurs after the second pause P 2 during the third pumping-down phase AP 3 , so that the relative amount M continues to decrease.
  • a residual amount RM of flushing liquid S which is not pumpable with the pumping sequence A and which is applied at the end of the pumping sequence A in the dishwasher 1, can be significantly reduced.
  • the described effect can therefore be used several times, so that the residual amount RM of flushing liquid not pumped off at the end of the pumping sequence A can be particularly greatly reduced. Therefore, further, not shown, separated by pauses Abpumpphasen could be provided to further reduce the not pumpable with the Abpumpsequenz A residual amount RM of rinsing liquid.
  • the pauses P 1 and P 2 can have a duration of at least 1 second, preferably at least 2 seconds, more preferably of at least 4 seconds and / or a maximum of 24 seconds, preferably not exceeding 12 seconds, more preferably of at most 7 seconds exhibit.
  • the specified minimum values for the duration of the pauses P 1 and P 2 are normally sufficient for the rinsing liquid S whirled up in the respective preceding pumping phase AP 1 or AP 2 to be in the drain pump 31 during the respective pause P 1 or P 2 in FIG reaches a rest position, in which by the start of the drain pump 31 at least a short-term pressure build-up is possible.
  • the specified maximums will further ensure that the entire pump-out sequence A does not take longer than necessary.
  • the pumping phases AP 2 and AP 3 following the first pumping phase AP 1 preferably have a duration of at least 1 second, preferably of at least 2 seconds, particularly preferably of at least 4 seconds, and / or of at most 32 seconds, preferably of at most 16 seconds, more preferably of at most 8 seconds.
  • the maximum amount of flushing liquid S that can be pumped out at the start of the drain pump 31 can be achieved in each of the subsequent pumping phases AP 2 and AP 3 .
  • the specified maximums will further ensure that the entire pump-out sequence A does not take longer than necessary.
  • washing liquid S By reducing the residual amount RM of washing liquid S which can not be pumped down by means of the pumping sequence A, it is possible in particular to reduce carryover of dirt and / or cleaning agents from the washing liquid S used before the pumping sequence A into a washing liquid S used after the pumping sequence A.
  • the dirt content and / or the cleaning agent content, in particular of the last rinsing fluid S used in a rinse SG can be reduced, which reduces staining on the cleaned items to be washed.
  • the cleaned ware thus receives, especially when it comes to glassware, a special shine.
  • FIG. 5 shows a schematic representation of a Kurzabpumpsequenz KA of the dishwasher 1 of the invention FIGS. 1 and 2 .
  • the short pumping sequence KA essentially differs from the pump-down sequence A in that fewer pump-out phases, for example only one pump-off phase AP 1, are provided.
  • this has the advantage that the time required for the short pumping sequence KA can be significantly reduced compared to the pumping sequence A.
  • the invention causes cleaned glasses and cutlery are improved spot-free.
  • the effect is preferably achieved by combining a drying process with a sorption system, for example with a zeolite system, or a conventional drying process with the indicated, special pump-down method, which reduces carry-over of dirt and / or cleaning agents.

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  • Washing And Drying Of Tableware (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
EP11176779.4A 2010-08-20 2011-08-08 Lave-vaisselle doté d'une séquence de vidange améliorée Active EP2420174B1 (fr)

Priority Applications (1)

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PL11176779T PL2420174T3 (pl) 2010-08-20 2011-08-08 Zmywarka do naczyń z polepszoną sekwencją odpompowywania

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DE102010039612A DE102010039612A1 (de) 2010-08-20 2010-08-20 Geschirrspülmaschine mit einer verbesserten Abpumpsequenz

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EP2420174A2 true EP2420174A2 (fr) 2012-02-22
EP2420174A3 EP2420174A3 (fr) 2017-11-15
EP2420174B1 EP2420174B1 (fr) 2020-06-17

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EP (1) EP2420174B1 (fr)
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Also Published As

Publication number Publication date
EP2420174A3 (fr) 2017-11-15
US9155442B2 (en) 2015-10-13
PL2420174T3 (pl) 2020-12-14
US20120042907A1 (en) 2012-02-23
EP2420174B1 (fr) 2020-06-17
DE102010039612A1 (de) 2012-02-23

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