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EP2301407A2 - Lave-vaisselle et procédé de commande correspondant - Google Patents

Lave-vaisselle et procédé de commande correspondant Download PDF

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Publication number
EP2301407A2
EP2301407A2 EP10173654A EP10173654A EP2301407A2 EP 2301407 A2 EP2301407 A2 EP 2301407A2 EP 10173654 A EP10173654 A EP 10173654A EP 10173654 A EP10173654 A EP 10173654A EP 2301407 A2 EP2301407 A2 EP 2301407A2
Authority
EP
European Patent Office
Prior art keywords
water
temperature
dishwasher
water supply
control device
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
EP10173654A
Other languages
German (de)
English (en)
Other versions
EP2301407B1 (fr
EP2301407A3 (fr
Inventor
Franz GRÜLL
Anton Oblinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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 EP2301407A2 publication Critical patent/EP2301407A2/fr
Publication of EP2301407A3 publication Critical patent/EP2301407A3/fr
Application granted granted Critical
Publication of EP2301407B1 publication Critical patent/EP2301407B1/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
    • A47L15/0023—Water filling
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/06—Water supply, circulation or discharge information
    • 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
    • A47L2401/12—Water temperature
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • 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
    • A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply

Definitions

  • the present invention relates to a dishwasher, in particular a domestic dishwasher, with a control device for controlling the dishwasher and at least one controllable by the control device water inlet for receiving water, which is provided for connection to at least one external water supply.
  • At least one water inlet is provided which can be controlled by a control device of the dishwasher.
  • a control device of the dishwasher In order to carry out the recording of water, it is provided here to connect the water inlet to an external water supply.
  • an external water supply may in particular be a building-side installed water supply.
  • a disadvantage of the known dishwashers is that a connection of the water inlet device to an unsuitable external water supply or to a faulty external water supply is often not noticed, which can cause damage to the dishwasher.
  • the object of the present invention is to provide a dishwasher in which such damage is prevented.
  • control device is designed for automatically controlling at least one monitoring sequence in which monitoring of one or more limit values for a temperature of the water provided by the external water supply connected to the controllable water supply takes place ,
  • the items to be washed are introduced into a rinsing container and there cleaned in a rinsing process, which is also called rinse, with the aid of a rinsing liquor and then dried.
  • the aim is in particular to perform a rinse cycle so that a predefined cleaning result and a predefined drying result is achieved as efficiently as possible.
  • Demanded is a high overall efficiency, which is conveniently obtained from the cleaning efficiency and the drying efficiency.
  • the cleaning efficiency corresponds in particular to the ratio of the cleaning result achieved by means of a rinse cycle and the effort required for this purpose, wherein the effort can comprise several dimensions, for example the energy requirement, the water requirement and / or the time requirement.
  • the drying efficiency corresponds in particular to the ratio of the drying result achieved by means of a rinse cycle and the effort required for this purpose, wherein the effort here can also include several dimensions, for example the energy requirement and / or the time required.
  • a rinsing liquor is understood to mean a liquid which is intended to be applied to the items to be washed in order to clean this and / or treat it in a different way.
  • the rinsing liquor can be provided, for example, for heating the items to be washed, which is customary, for example, during a rinsing step.
  • a rinse liquor usually consists to a large extent of water.
  • the rinsing liquor can be enriched with cleaning agents, with cleaning aids, such as, for example, rinse aid and / or with dirt that has been removed from the items to be washed.
  • a control device in which one or more wash programs for controlling a wash cycle for cleaning items to be washed are stored.
  • the control device can be designed as a so-called sequence control, in particular as an electronic sequence control.
  • several wash programs are provided, one of which can be selected and started by the operator. This makes it possible to adjust the sequence of a rinse cycle in particular to the load, to the type of loading, to the degree of soiling of the items to be washed and / or to the desired duration of the rinse cycle.
  • At least one rinse program for cleaning the items to be washed comprises a rinsing step, in which water is taken up, a rinsing liquor comprising absorbed water is formed, and the items to be washed located in the rinsing room are sprayed with rinsing liquor.
  • the rinse program provides several such rinsing steps. This may in particular be a pre-rinse step, a cleaning step, an intermediate rinse step and a rinse step in this order.
  • rinse programs are possible in which one or more of these program steps are repeated several times.
  • a typical washing program includes an adjoining drying step for drying the cleaned items to be washed.
  • a pre-rinse step serves primarily to remove coarse contaminants from the items to be washed.
  • the purpose of a subsequent cleaning step is to completely remove contaminants from the dishes.
  • a now performed intermediate rinsing step serves in particular for the removal of detergent residues which adhere to the items to be washed.
  • the rinsing liquor can expediently be mixed with cleaning agent in order to improve the cleaning effect.
  • a subsequent rinse step is intended in particular to avoid stains on the items to be washed, which could be caused by dissolved substances in the water, such as, for example, salt and / or lime.
  • the rinsing liquor can be mixed with rinse aid during the rinse step.
  • the dishwasher can provide so-called self-drying, in which case a further task of the rinsing step is to prepare the subsequent drying step.
  • a further task of the rinsing step is to prepare the subsequent drying step.
  • the items to be washed are heated to a high temperature during the rinse step by the rinse liquor, so that water droplets adhering to the hot items to be evaporated in the subsequent drying step and precipitate on the respective inside of the rinse container due to the lower temperature prevailing there.
  • the dishwasher may have an automatic metering device.
  • the water required for carrying out rinses will be taken up in the dishwasher according to the invention via a water inlet device which has at least one controllable water inlet. To operate the dishwasher, the water inlet is connected to an external water supply.
  • the water inlet may comprise a valve, which may be designed as a solenoid valve.
  • a valve is designed to have only an open state and a closed state.
  • throttle valves or other controllable valves which make it possible to control the flow of water accurately. In both cases can be dispensed with an external device for controlling the water absorption.
  • the valve is arranged at an upstream end of a supply hose and is designed such that it can be fastened to a connection piece of the external water supply.
  • the valve may, for example, have a connecting thread, which corresponds with threads of conventional household faucets.
  • Such valves are designed in particular as so-called Aquastop valves.
  • a downstream end of the feed hose is fluidly connected via a housing-fixed connection piece with the washing chamber of the dishwasher, so that the absorbed water is passed into the washing chamber.
  • the feed hose may be formed as a safety hose with an inner water-carrying pressure hose and an outer sleeve, wherein between the pressure hose and sheath each a leak water channel for discharging any leak water may be provided.
  • the control device may be associated with a leak water sensor for detecting leakage water, so that the control device can close the valve when leakage water occurs during operation of the dishwasher.
  • the water inlet of a dishwasher so in particular the valve and the supply hose are, in terms of design, suitably adapted to technical characteristics of the external water supply to which the water supply is to be connected. Determining factors for the structural design of the water inlet are, in particular, the temperature and / or the pressure of the water supplied by the external water supply. If, however, the actual temperature of the water supplied by the external water supply deviates substantially from the intended temperature, then damage to the dishwasher and there especially to the water inlet can occur. With a significant temperature deviation, damage is possible in a relatively short time, but in the longer term damages are to be feared even at lower temperature deviations.
  • control device of the dishwasher for the automatic control and implementation of at least one monitoring sequence for the temperature of the water provided by the external water supply is formed, both short-term and long-term damage to the dishwasher can be avoided.
  • monitoring of at least one limit value for the temperature of the supplied water takes place.
  • the at least one limit value to be monitored can be stored in the control device, for example in an electronic memory of the control device.
  • the limit value (s) can be set in advance so that a deviation of the actual temperature of the supplied water is detected by a target value, which could cause damage to the dishwasher.
  • By monitoring predefined limit values it is possible in particular to detect temperature deviations which are based on a malfunction or maloperation of the external water supply or which are based on the fact that the water feed was connected to a water supply which was unsuitable from the outset. If the dishwasher has several water inlets, one or more limit values can be monitored for each feed.
  • the monitoring sequence provides for a measurement of the temperature of water taken in via the water supply by means of a temperature sensor.
  • a temperature sensor By measuring the temperature within the monitoring sequence, it can be ensured that the monitoring of the limit (s) will be based on the actual temperature of the water provided.
  • the temperature of the water with which the dishwasher is charged is also detected.
  • the measurement can be provided in particular during a wash program for washing dishes during the initial control of the water inlet for receiving water.
  • the fact is taken into account that the temperature of the water provided can change between two washing programs. If the measurement takes place during the initial activation of the water supply as part of a wash program, it is ensured that an intolerable temperature deviation of the water can be detected early.
  • the first shot of Water during a wash program can be done, for example, as part of the pre-rinse step or as part of a first cleaning step.
  • the temperature sensor is arranged downstream of the at least one water inlet.
  • a temperature sensor have virtually all modern dishwashers. This can serve, for example, for controlling the heating device of the dishwasher during the execution of a washing program. In this way, can be dispensed with an additional temperature sensor, so that simplifies the construction of the dishwasher.
  • the dishwasher has several water inlets, with such a temperature sensor arranged downstream of the water inlets it is also possible to measure the temperatures of several water supplies with only one sensor. This can be done by first opening a first water inlet, then measuring the temperature of the water drawn above, then closing the first water inlet, and later opening another water inlet to measure its water temperature.
  • the respective monitoring sequence may in particular comprise a comparison of the temperature of the water with an upper limit for the temperature of the water.
  • an upper limit value is understood as meaning a limit value which limits a tolerance range for the temperature of the water to the top. So if the temperature of the water is below an upper limit, as a rule, no dependent on the result of the comparison measures are taken. On the other hand, if the temperature of the water is above an upper limit value, a measure associated with the limit value can be carried out.
  • the deposit of upper limit values in particular prevents damage which could occur due to an excessively high temperature of the water.
  • the respective monitoring sequence may comprise a comparison of the temperature of the water with a lower limit for the temperature of the water.
  • the monitoring sequence usually sees then a measure if the temperature of the water is less than the lower limit. In this way, damage to the dishwasher can be avoided by a too low temperature of the water.
  • At least one of the limit values is a warning limit, which, if exceeded, provides an output of a warning message about output means controllable by the control device, in particular via acoustic and / or optical output means.
  • a warning threshold may be an upper warning threshold that is considered exceeded when the temperature is greater than the warning threshold.
  • a warning limit may also be a lower warning limit, which is then considered exceeded if the temperature is lower than the warning limit.
  • the control device expediently causes the issuance of a warning message.
  • the operator is informed that the temperature of the water provided deviates from the setpoint temperature.
  • the operator can then check the operability of the external water supply connected to the water inlet. He can also check whether the water supply is connected to a basically suitable water supply. He can then take appropriate action prompted by the warning message.
  • the warning threshold may be set to indicate a small difference in the temperature of the water to the intended water temperature. In this way, only long-term damage to the dishwasher can be prevented.
  • the output means may comprise a buzzer and / or loudspeaker for issuing audible warnings. To output optical warning messages lamps, LEDs, alphanumeric displays and / or graphical displays can be provided.
  • At least one of the limit values is an abort limit value, above which a discontinuation of a water absorption is provided.
  • This may be at least one upper termination limit value and / or at least one lower termination limit value.
  • Cancellation limits can be so for the respective water supply be determined that in a deviation of the temperature of the water from the target value, which results in the risk of damage occurring in the short term, the water supply is closed, in order to avoid direct damage in this way.
  • an output of a termination message is provided via output means controllable by the control device, in particular via acoustic and / or visual output means.
  • the termination message can be automatically output by the control device via those output means, which are also provided for the output of warning messages.
  • separate dispensing means are also conceivable, which, however, can be constructed analogously to the dispensing means for warning messages.
  • one of the one or more controllable water inlets is in particular a cold water inlet which is provided for connection to an external cold water supply, wherein expediently a comparison of the temperature of the cold water inlet provided water with an upper warning threshold and / or an upper break limit for the temperature of the water.
  • Cold water supplies for connection to a household cold water supply are structurally designed so that they can easily withstand the typical temperatures of the water of such a cold water supply over the entire lifetime of a dishwasher.
  • the valve and the supply hose of the cold water inlet can be adapted exactly to the expected temperatures of the water.
  • the supply hose can be damaged in the short term or long term depending on the temperature and, for example, be leaking.
  • the valve designed for cold water may overheat and thereby become inoperative. By monitoring at least one upper limit, such damage to a cold water inlet can be avoided.
  • the upper warning limit for the water supplied to the cold water inlet has a value between 25 ° C and 35 ° C.
  • the above values are values that, when exceeded, indicate that either the cold water inlet is connected to a hot water supply or the cold water supply is inadvertently cross-linked to a hot water connection.
  • a warning message issued when such a warning limit value is exceeded can cause the operator to check the connection of the cold water inlet or the functionality of the cold water supply.
  • the upper demolition limit value for the water supplied to the cold water inlet has a value between 30 ° C and 40 ° C. Temperatures of the absorbed water lying below these values can be absorbed by a conventional cold water feed, at least in the short term. When they are exceeded, however, the operation of the dishwasher is interrupted, so as to prevent immediate damage.
  • one of the one or more controllable water inlets is, in particular, a hot water inlet intended for connection to an external hot water supply, wherein a comparison of the temperature of the water provided to the hot water inlet with an upper warning threshold and / or with an upper break limit for the temperature of the water.
  • hot water supplies are designed for a higher temperature than cold water supplies, but also the valve and / or the feed hose of a hot water inlet at particularly high temperatures, in particular over 50 ° C, can be damaged.
  • high temperatures can occur especially in case of incorrect operation or other malfunction of the connected hot water supply.
  • Such temperatures can also occur in case of malfunction in a temperature control of a hot water supply.
  • the monitoring of an upper warning limit value and / or an upper limit for the temperature of the water supplied to the hot water supply can prevent damage due to excessive temperatures.
  • the upper warning limit for the water supplied to the hot water supply has a value between 50 ° C and 70 ° C. Temperatures below these values can usually withstand a hot water supply at least in the short term, although the user is expediently informed of the unusually high temperatures, so that the latter can prevent the hot water supply from becoming permanently exposed to temperatures exceeding the warning threshold.
  • the upper demolition limit value for the water supplied to the hot water inlet has a value between 60 ° C and 80 ° C. The exact determination of the demolition limit is carried out so that a short-term damage to the hot water supply can be safely prevented.
  • a comparison of the temperature of the water supplied to the hot water supply is carried out with a lower warning limit for the temperature of the water, the lower warning limit preferably has a value between 30 ° C and 40 ° C.
  • the lower warning limit preferably has a value between 30 ° C and 40 ° C.
  • the dishwasher according to the invention can comprise a cold water inlet and a hot water inlet, for each of which one or more limit values are monitored.
  • a water inlet device may also be referred to as a bithermic water inlet device.
  • the invention relates to a method for operating a dishwasher, in particular for operating a dishwasher according to the invention, which has a control device for automatic control of the dishwasher and at least one controllable by the control device water inlet for receiving water, wherein the water inlet is connected to at least one external water supply.
  • a control device for automatic control of the dishwasher and at least one controllable by the control device water inlet for receiving water, wherein the water inlet is connected to at least one external water supply.
  • the control device it is provided that one or more limit values for a temperature of the water provided by the external water supply are monitored by the control device.
  • the method according to the invention makes it possible to avoid damage to a dishwasher.
  • FIG. 1 only those components of a dishwasher are provided with reference numerals and explained which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.
  • FIG. 1 shows an advantageous embodiment of a household dishwasher according to the invention 1 in a schematic side view.
  • the dishwasher 1 has a control device 2, in which at least one wash program for controlling a wash cycle for washing dishes, in particular dishes, is deposited.
  • a plurality of washing programs are stored, so that by selecting a suitable washing program, the sequence of a controlled by the control unit 2 rinse, for example, to the load, to the type of load, to the degree of contamination of the dishes and / or to the desired duration of the wash can be adjusted.
  • the one or more washing programs may comprise at least one pre-rinsing step, at least one cleaning step, at least one intermediate rinsing step, at least one rinsing step and / or at least one drying step.
  • the control device 2 is associated with an operating device 3, which allows an operator of the dishwasher 1 to call up and start one of the washing programs. 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 can be used to output optical messages, e.g. Indicator lights, LEDs, an alpha-numeric display and / or a graphical display include. Furthermore, the output device 4 can be used to output acoustic messages, e.g. a buzzer, a speaker 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.
  • 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 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 enables 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 positioned there, so that the required signal connections between the operating device 3, the output device 4 and the control device 2 can be kept short. In principle, however, it is possible to arrange the operating device 3, the output device 4 and / or the control device 2 elsewhere.
  • the control device 2 could also be designed decentralized, which is understood to include spatially separated components, which are connected via communication means such that they can cooperate.
  • the dishwasher 1 has an upper dish rack 8 and a lower dish rack 9 for positioning dishes.
  • the upper dish rack 8 is arranged on extension rails 10, which are each attached to a side wall of the washing compartment 5.
  • the crockery basket 8 can be moved out of the washing container 5 with the door 6 open by means of the extension rails 10, which facilitates the loading or unloading of the upper crockery basket 8.
  • the lower dish rack 9 is arranged in an analogous manner on extension rails 11.
  • the dishwasher 1 comprises a water inlet 12 shown schematically.
  • the water inlet 12 comprises a valve 13, which can be controlled by the control device 2, and a feed tube 14.
  • the valve 13 may be formed, for example, as a solenoid valve.
  • the inlet side of the valve 13 is designed such that it can be attached to a connecting piece WV of a household water supply, for example to a tap WV.
  • the connection can be made in each case by means of a screw connection, a snap connection or the like.
  • Such a valve 13 may be formed in particular as an aquastop valve.
  • the output side of the valve 13 is connected to the supply hose 14, wherein the downstream end is connected to a connecting piece 15 on a housing 16 of the dishwasher 1.
  • FIG. 1 the inlet side of the valve 13 is connected to a tap WV of an external water supply WV.
  • the water inlet 12 By means of the water inlet 12, it is consequently possible to take up water W from the external water supply WV and to guide it into the interior of the dishwasher 1.
  • valve 13 is closed when it is not activated, so that the dishwasher 1 is disconnected from the water supply WV in the off state. In this way, leakage of leakage water from the switched-off dishwasher 1 can be avoided in the event of a fault.
  • the supply hose 14 may be formed as a safety hose with an inner water-carrying pressure hose and an outer sheath hose, wherein between the pressure hose and sheath a leakage water channel for discharging any leak water may be provided.
  • the leakage water channel may be formed so that leakage water, which occurs during operation of the dishwasher 1 in the region of the water inlet 12, is passed through the housing-fixed connection piece 15 in the interior of the dishwasher 1.
  • a leak water sensor not shown, so that appropriate measures, such as a closing of the valve 13, can be initiated.
  • the dishwasher 1 also has in FIG. 1 not shown on components, which make it possible to direct the absorbed water W from the outlet of the housing-fixed connector 15 in the washing chamber 7. It is expediently provided that the recorded water W is first performed via a water treatment device, not shown, for processing the absorbed water W, before it enters the rinsing chamber 7.
  • a collecting pot 18 is formed, in which the introduced into the washing chamber 7 water W collects due to its gravity.
  • the collecting pot 18 is in connection with a circulating pump 19, with the aid of which introduced water W comprehensive rinse S can be pumped from the collecting pot 18 via a heater 20 to a water distributor 21.
  • the circulating pump 19, the heating device 20 and the water diverter 21 are controlled by the control device 2 during the operation of the dishwasher 1.
  • the heater 20 is provided for heating rinse S and designed as a continuous heating 20.
  • an openly arranged heating element for example a heating element arranged in the rinsing chamber 7 or in the collecting pot 18, could also be provided.
  • the exemplary embodiment has two outlets, of which a first with an upper spraying device, in particular an upper rotatable spraying arm 22, and a second with a lower spraying device, in particular a lower, rotatable spray arm 23, is connected.
  • the spray arms 22 and 23 form a spray unit 22, 23 arranged in the rinsing chamber 7, which makes it possible to apply wash liquor S to the wash ware.
  • it could also be provided other outputs, for example, to allow the feeding of other spray arms and / or fixed spray elements.
  • the water distributor 21 is controllable such that the rinsing fluid S conveyed by the circulation pump 19 is selectively conveyed into the rinsing chamber 7 by none of the spray arms 22, 23, by one of the spray arms 22, 23 or by both spray arms 22, 23.
  • a temperature sensor 24 is furthermore provided, which is designed to detect the temperature of the rinsing liquor S.
  • the temperature sensor 24 is arranged in the collecting pot 18 in the exemplary embodiment. However, it could also be provided elsewhere, where a thermal contact with the water introduced W comprehensive rinse S is possible.
  • the dishwasher 1 may further comprise a metering device 25, which is arranged for example on the inside of the door 6.
  • the metering device 25 can be controlled by the control device 2 and makes it possible for the wash liquor S to be automatically supplemented with cleaning agents and / or cleaning aids, such as, for example, rinse aid, during a wash cycle.
  • the dishwasher 1 comprises a drain pump 26, with the help of which no longer required wash liquor S can be pumped out of the collecting pot 18 via a waste water connection 27 as wastewater AW.
  • the sewage connection 27 can be connected to an external sewage disposal system with a sewage hose, not shown.
  • cold water W is understood to mean water W, which is provided by a household standard cold water supply WV and typically has a temperature in the range of 10 ° C to 20 ° C, in exceptional cases in the range of 5 ° C to 25 ° C.
  • the water inlet 12 is structurally designed so that it can withstand these temperatures over the entire life of the dishwasher 1.
  • hot water W is understood to mean water W, which is heated by means of a heating device of an external water supply, so that it has, for example, a nominal temperature of 50 ° C.
  • the temperature of the water W provided by an external hot water supply WV may vary widely depending on the operating conditions of the external hot water supply WV, for example, in a range of 40 ° C to 60 ° C. It is typically provided to form the water inlet 12 for the said temperature range of the hot water W.
  • both the intake of hot water W and cold water W can be provided, which is referred to as bithermic water connection.
  • the dishwasher 1 has two water inlets 12, which can each be connected to the housing-fixed connection piece 15.
  • the or the water supply to connect to one or two external water supplies WV is provided for the operation of the dishwasher 1, the or the water supply to connect to one or two external water supplies WV.
  • the temperature of the water W provided by the respective water supply WV does not correspond to that of the water W, which is to be recorded with the connected water inlet 12.
  • Such temperature differences can arise, for example, by a connection to an unsuitable water supply WV, by a malfunction of the water supply WV, and / or by an incorrect operation of the external water supply WV.
  • control device 2 is designed to automatically control at least one monitoring sequence for the temperature of the water W supplied to the water inlet.
  • FIG. 2 shows an exemplary flowchart of a washing program SP in a dishwasher 1 according to the invention, which has a water inlet 12 for receiving cold water W.
  • a monitoring sequence UES is embedded in the rinsing program SP, with which limit values G OA , G OW for the temperature T W of the water W obtained from the external water supply WV are monitored.
  • the washing program SP including the monitoring sequence UES is shown as a flowchart, wherein only those program steps S1-S12 are shown and explained, which are necessary for the understanding of the invention.
  • further program steps S can be provided. While general program steps S1, S2, S6, S7 are surrounded by dashed lines, the program steps S2-S5 and S8-S10 of the actual monitoring sequence UES are surrounded by solid lines.
  • the program SP comprises a first program step S1, in which an operator calls the flushing program SP and starts it. This operation can be performed on the operating device 3.
  • the further program steps S of the wash program SP are now controlled automatically by the control device 2.
  • the valve 13 is opened by the control device 2, so that the water intake for the rinse cycle is started.
  • water W passes from the valve 13 via the supply hose 14, the housing fixed Connection piece 15 and not shown further means in the washing chamber 7. Here it collects due to its weight on the bottom 17 of the washing container 5 and passes from there into the collecting pot 18th
  • a measurement of the temperature T W by means of the temperature sensor 24 takes place.
  • a measured value of the temperature T W is then supplied to the control device 2 via means not shown.
  • the value of the temperature T W is compared with an upper termination limit value G OA .
  • the upper termination limit value G OA is adapted to the dishwasher 1 so that damage to the same is excluded, provided that the upper termination limit value G OA is not exceeded by the temperature T W.
  • the upper termination threshold G OA may, for example, have a value between 30 ° C and 40 ° C.
  • step S5 is performed after the comparison.
  • the temperature T W of the water W is compared with an upper warning value G OW .
  • G OW an upper warning value
  • the washing program SP is continued in a conventional manner, which is summarized as step S6.
  • the washing program is ended in step S7.
  • step S4 if it is determined in step S4 that the temperature T W of the water W exceeds the upper stop limit G OA , then in a step S8, the valve 13 is closed, and so the water absorption stopped. In this way, short-term damage to the dishwasher 1 can be prevented.
  • the completion of the water intake is notified to the operator in a step S9 by issuing an abort message. As a result, the fault is displayed to the operator immediately, so that he can take remedial action without loss of time.
  • These measures may include a check whether the cold water inlet 12 is accidentally connected to a hot water supply WV was, or whether a connected cold water supply WV works incorrectly. After the termination message has been output, the flushing program SP is then ended altogether.
  • step S6 If the upper termination limit value G OA was not exceeded in step S4, but the upper warning limit value G OW is exceeded in step S5, the output of a warning message occurs in a step S10. In this way, the operator is informed that although an unusually high temperature T W of the water W is present, but no short-term damage is to be feared.
  • the warning message allows the operator to determine the causes of the unusually high temperature T W of the water and to remedy the situation if necessary. Thus, damage to the dishwasher 1 that occurs only in the long term can also be avoided. However, since there is no immediate danger, after the warning message is issued, the washing program SP can be continued by proceeding to step S6.
  • FIG. 3 shows an exemplary flowchart of a washing program SP in a dishwasher 1 according to the invention, which has a water inlet 12 for receiving hot water W.
  • the basic procedure corresponds to the procedure, which in FIG. 2 for a dishwasher with a cold water inlet 12 is shown.
  • the values of the upper termination limit value G OA and the upper warning limit value G OW used in steps S4 and S5 are higher.
  • the upper termination threshold G OA may have a value between 60 ° C and 80 ° C and the upper warning threshold G OW may have a value between 50 ° C and 70 ° C.
  • a step S11 is provided in which a lower warning limit value G UW with respect to the temperature T W of the water W is monitored. If the lower limit value G UW is not exceeded, step S6 is performed after step S11, so that the washing program SP is continued. However, if the lower warning limit value G UW is exceeded, another warning message is output in step S12.
  • the lower warning limit value G UW may, for example, have a value between 30 ° C and 40 ° C.
  • the warning message issued in step S12 may alert the operator that the hot water supply 12 may be accidentally on a cold water supply WV has been connected, or that there is a fault in a connected hot water supply WV.
  • the invention relates in one embodiment to a dishwasher 1, which has a cold water inlet 12, which is provided for connection to a cold water supply WV. If such a dishwasher 1 is connected to a hot water supply WV, then the operator is not made aware of this error in known dishwashers.
  • a dishwasher 1 the operator can be shown such a wrong connection, wherein the water temperature of the first metered incoming quantity is measured in the device. Is this z. B. 30 ° C and above, it can be assumed that there is a connection to a hot water supply WV and the operator of this connection of a device 1 with provided cold water connection 12 are displayed by a visual display or an error code.
  • control device of the dishwasher can thus be monitored by means of the control device of the dishwasher according to an advantageous embodiment of the invention, in particular, whether one or more components of the dishwasher, which are specifically designed or prepared for cold water, actually with cold water in a predetermined, reliable temperature range of an external water supply be supplied or whether an impermissible temperature exceeding an upper allowable temperature limit of the supplied water occurs, which could lead to overuse or damage of one or more components or components of the dishwasher, such as their water supply hose, water inlet valve, etc.
  • a control criterion is generated from the temperature monitoring of the introduced into the dishwasher and / or entering this water, with which a remedy against an occurred critical temperature exceeding situation is initiated.
  • the inlet valve of the water inlet can be blocked via a corresponding control line of the control device.
  • the dishwasher is always operated only in a non-critical temperature range with water from the respective connected water supply.
  • a device-side detection and reporting allows whether the dishwasher was connected to hot water, although it is designed and approved for a cold water supply.

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  • Washing And Drying Of Tableware (AREA)
EP10173654.4A 2009-09-02 2010-08-23 Lave-vaisselle et procédé de commande correspondant Active EP2301407B1 (fr)

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DE102014108868B4 (de) 2014-06-25 2024-09-26 Miele & Cie. Kg Verfahren zum Betreiben eines wasserführenden Haushaltgeräts
KR102443320B1 (ko) 2016-01-05 2022-09-15 엘지전자 주식회사 식기 세척기 및 식기 세척기의 제어방법
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Also Published As

Publication number Publication date
EP2301407B1 (fr) 2023-05-24
US8602042B2 (en) 2013-12-10
EP2301407A3 (fr) 2017-01-18
CN101999875A (zh) 2011-04-06
US20110048460A1 (en) 2011-03-03
CN101999875B (zh) 2016-03-23
DE102009029148A1 (de) 2011-03-03

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