EP1137362A2 - Household dishwasher - Google Patents

Household dishwasher

Info

Publication number
EP1137362A2
EP1137362A2 EP99966925A EP99966925A EP1137362A2 EP 1137362 A2 EP1137362 A2 EP 1137362A2 EP 99966925 A EP99966925 A EP 99966925A EP 99966925 A EP99966925 A EP 99966925A EP 1137362 A2 EP1137362 A2 EP 1137362A2
Authority
EP
European Patent Office
Prior art keywords
household dishwasher
outlet
dishwasher according
spray devices
closed
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
EP99966925A
Other languages
German (de)
French (fr)
Other versions
EP1137362B1 (en
Inventor
Ulrich Deiss
Helmut Jerg
Bernd Schessl
Michael 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
Publication of EP1137362A2 publication Critical patent/EP1137362A2/en
Application granted granted Critical
Publication of EP1137362B1 publication Critical patent/EP1137362B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms

Definitions

  • the invention relates to a domestic dishwasher with a washing container with at least two spray devices which act on the items to be cleaned which are arranged in the washing container by means of a liquid conveyed by a circulating pump.
  • a household dishwasher of the type mentioned is e.g. known from DE-OS 24 28 991.
  • the at least two spray devices are simultaneously charged with the liquid conveyed by a circulating pump.
  • each spray device is alternately charged with the liquid conveyed by a circulating pump, in order to achieve the full pressure to let the circulating pump act only on one spray device and to require a smaller amount of liquid and less energy for circulating and also for heating the circulated liquid.
  • Reversal devices usually so-called water switches, are used to carry out such a method of alternately loading the spray devices.
  • EP-OS 05 47 01 1 it is known, for example, to alternately open one of the liquid supply lines and to simultaneously close the other liquid supply lines by means of a hydraulically operated flap valve arranged between liquid supply lines to the spraying devices, this reversing device having a separate housing and in Cable routing of the liquid supply lines is arranged.
  • EP-OS 02 37 994 it is also known, for example, to alternately open one of the liquid supply lines and to close the other at the same time by means of a ball in the pressure port of the circulation pump, which changes position when the operation of the circulation pump is interrupted. Furthermore, it is known, for example from EP-PS 05 85 905, to open and close one or more accesses to liquid supply lines by means of a motor-driven, rotating horizontal disc with bores, this reversing device having a separate housing and being arranged in the line of the liquid supply lines is.
  • the invention is therefore based on the object of providing a household dishwasher of the type mentioned at the beginning with a reversing device arranged at a non-constricting point for loading spray devices.
  • the liquid conveyed from the circulating pump to an inlet port of a flow heater and through the flow heater the flow heater having at least two outlet ports for supplying the liquid to different spraying devices, which by means of a flow heater, in the direction of flow can be opened or closed in front of the outlet port reversing device such that either one of the outlet ports or a number of outlet ports or all outlet ports are alternately successively and / or continuously opened or closed.
  • the changeover device is arranged practically in the extension of the outlet port directly at the outlet of the instantaneous water heater, the changeover device is arranged at an easily accessible and non-constricting point of the household dishwasher and is therefore easy to assemble.
  • the invention has succeeded in creating a household dishwasher of the type mentioned at the outset with a reversing device arranged at a non-constricting point for loading spray devices.
  • the number of outlet connections of the instantaneous heater expediently corresponds to the number of spray devices or groups of spray devices operated simultaneously.
  • the flow heater has two outlet connections.
  • an outlet opening of the continuous-flow heater located in front of each outlet nozzle can be closed by means of a rotary valve of the reversing device arranged in the flow direction in front of the outlet openings.
  • the known reversing devices described at the outset also have the disadvantage that they have a complicated structure and are therefore easily prone to failure. This disadvantage is overcome with the preferred feature of the invention, since e.g. Contamination deposits cannot interfere with a closing function of the rotary valve, since they are pushed away by the rotating rotary valve.
  • the rotary slide valve has at least one closed area and at least one area open through a bore, whereby simple manufacture of the rotary slide valve is achieved.
  • the rotary slide valve alternately has a closed area alternately after an open area, between which there is an empty space, which further simplifies the manufacture of the rotary slide valve and simple control of the rotation of the rotary slide valve.
  • the rotary slide valve is brought into at least one position by means of a drive device in which the at least one closed area or a number of closed areas closes the at least one exit opening or a number of exit openings and / or in which all exit openings are open.
  • a drive device in which the at least one closed area or a number of closed areas closes the at least one exit opening or a number of exit openings and / or in which all exit openings are open.
  • the rotary slide valve advantageously has the shape of a propeller blade with two opposing regions, which is brought into a position by means of the drive device in which the closed region closes an outlet opening and the open region keeps the other outlet opening open.
  • the rotary slide valve has circumferential ribs which protrude in the installed position in the direction of the outlet openings and which have a semicircular cross section.
  • the drive device is a motor with a gear.
  • a motor with a gearbox is a drive unit of the reversing device that is extremely easy to control for the continuous change in the loading of the spraying devices as well as for a longer change in time or for a permanent opening of one or more supply lines to the spraying devices, which further simplifies the reversing device.
  • FIG. 1 shows a household dishwasher according to the invention in a schematic representation
  • FIG. 2 shows a sectional illustration of the side view of a continuous-flow heater with the reversing device according to the invention
  • Fig. 3 is a sectional view of the top view of the water heater with the reversing device according to the invention according to the section lines III-III in Fig. 2 and
  • FIG. 4 shows an enlarged illustration of a part of the reversing device according to the invention corresponding to detail IV in FIG. 2.
  • a household dishwasher 1 has a washing container 2, into which items to be cleaned, not shown, e.g. dirty dishes and cutlery, usually filled into crockery baskets 3, 4.
  • at least two spray devices in the exemplary embodiments shown two spray devices 5, 6 are arranged in the washing container 2, which act on liquid to be cleaned in the washing container 2.
  • This liquid usually called the rinsing liquor, is fed into liquid supply lines 8 by means of a circulation pump 7.
  • the liquid conveyed in household dishwashers 1 is usually heated at least in a sub-program section of a washing program, for which purpose the household dishwasher 1 according to the invention has a continuous-flow heater 10.
  • the liquid conveyed in the household dishwasher 1 according to the invention is transferred from the circulating pump 7 to an inlet connection 11 of the instantaneous water heater 10 and through the instantaneous water heater
  • the instantaneous water heater 10 has at least two outlet connections, namely one of the number of spray devices or operated simultaneously Groups of spraying devices have a corresponding number of outlet connections, in the exemplary embodiments shown two outlet connections 12, 13. From the outlet connections 12, 13 of the continuous-flow heater 10, the liquid is fed via the already mentioned liquid feed lines 8, 9 to the respective different spray devices 5, 6.
  • the heating rods required for heating the liquid in the water heater 10 are designated by 16.
  • the outlet nozzles 12, 13 can be opened or closed by means of a reversing device 20 arranged on the flow heater 10 in the flow direction in front of the outlet nozzles 12, 13 such that either one of the outlet nozzles 12, 13 or a number of outlet nozzles 12, 13 each or all outlet connections 12, 13 are opened or closed alternately one after the other and / or continuously.
  • the two outlet ports 12, 13 of the instantaneous water heater 10 can be opened or closed by means of the reversing device 20 in such a way that either one of the outlet ports 12, 13 or both outlet ports 12, 13 alternately open and / or constantly open or closed are.
  • a rotary slide valve 21 of the reversing device 20 is arranged in the flow direction in front of each outlet nozzle 12, 13 upstream outlet openings 14, 15 of the instantaneous water heater 10, through which one of the outlet openings 14, 15 of the instantaneous water heater 10 can be closed.
  • the known reversing devices described at the outset also have the disadvantage that they have a complicated structure and are therefore easily prone to failure. This disadvantage is overcome with the rotary valve 21, since, for example, dirt deposits cannot interfere with the closing function of the rotary valve 21 since they are pushed away by the rotating rotary valve 21.
  • the rotary valve 21 has the shape of a propeller blade with two areas 22, 23 lying opposite one another, the rotary valve 21 having a closed area 22 and an area 23 open through a bore.
  • the rotary slide valve 21 is brought into at least one position by means of a drive device 30 in which the at least one closed area 22 or a number of closed areas 22 closes the at least one exit opening 14, 15 or a number of exit openings 14, 15 and / or in which all exit openings 14, 15 are open.
  • the rotary slide valve 21 has two opposing regions 22, 23, a closed region 22 and an open region 23.
  • Slider 21 is brought into a position by means of the drive device 30, in which the closed area 22 closes an exit opening 15 and the open area 23 keeps the other exit opening 14 open.
  • a position is shown in FIG. 2.
  • the rotary slide valve 21 has, on the areas 22, 23, circumferential ribs 24, 25 projecting in the installed position in the direction of the outlet openings 14, 15, which have a semicircular cross section and for better contact serve the rotary valve 21 on the inner wall of the instantaneous water heater 10.
  • the drive unit 30 is a motor 31, for example an electric motor, with a transmission 32, for example a gear transmission, which is shown only schematically in FIG. 2.
  • the rotary valve 21 is connected to the gear 32 by means of a shaft 33 which is guided in the housing of the instantaneous water heater 10.
  • the motor 30 and the gear 32 are protected by a cover 18 seated on a raised edge 17 of the instantaneous water heater 10.
  • the cover 18 also has bearing positions for the gear 32, of which only one raised bearing journal 19 is shown as a bearing for the shaft 33.
  • the function of the reversing device 20 is explained below using the exemplary embodiment shown. If a continuous, alternate loading of the spray devices 5, 6 is desired, the connection of the motor 31 of the drive device 30 to the supply voltage is initiated by a program control unit of the household dishwasher 1, which is not explained in detail, and the rotary slide valve 21 begins to rotate. As a result, the closed region 22 of the rotary slide valve 21 is rotated until it lies sealingly on one of the outlet openings 14, 15, in FIG. 2 on the outlet opening 15. In this case, the supply of the liquid flowing through the instantaneous water heater 10 to the lower spray device 6 is interrupted and the supply to the upper spray device 5 is opened.
  • the motor 31 continues to rotate, as a result of which, after the rotary slide valve 21 has been rotated by 180 ° in the exemplary embodiment, the closed region 22 lies sealingly on the outlet opening 14.
  • the supply to the upper spray device 5 is thus interrupted and the supply to the lower spray device 6 is opened.
  • the closed area 22 comes to rest on the exit opening 15 and the process continues as described above.
  • the duration of the opening and closing times of the individual feeds to the spray devices 5, 6 is direct in this type of drive of the reversing device depending on the selected speed of the motor 31 or the design of the transmission 32.
  • the rotary slide valve 21 Since the rotary slide valve 21 has a closed area 22 alternately after an open area 23 in the direction of rotation, between which there is an empty space, as can be seen in FIG. 3 It can be seen that the rotary slide valve 21 rotates into a position in which both outlet openings 14, 15 are open, the position of the outlet openings 14, 15 not visible in this view being indicated by dash-dotted lines. This means that for a relatively short period of time, depending on the speed of the rotary slide valve 21, the liquid flowing through the instantaneous water heater 10 is supplied to both spray devices 5, 6. As described at the beginning, a continuous, alternate loading of the spray devices 5, 6 is used in particular to save water.
  • the rotational position of the rotary slide valve 21 is determined by means of a sensor system (not described in more detail) and the program control device switches off the motor 31 for a predetermined duration, so that the respective rotational position of the rotary valve 21 is maintained for this duration.
  • the sensor system described above is used to operate the motor 31 only until the position of the opening of the outlet opening 14 for the outlet nozzle 12 closes the liquid supply line 8 to the upper spray device 5 is reached and then to maintain this position through the complete washing program, since the motor 31 is no longer operated. If ultimately the uninterrupted operation of both spraying devices is desired, the intermediate position of the opening of both outlet openings 14, 15 can be determined again by means of the sensor system described above and this position can be maintained over the complete washing program since the motor 31 is no longer operated (see FIG 3). The filling quantity with rinsing liquid is increased accordingly.
  • the invention By arranging the reversing device 20 on the continuous-flow heater 10, the invention has succeeded in creating a household dishwasher 1 with a reversing device 20 arranged at a non-constricting point for loading spray devices 5, 6.
  • the arrangement of a plurality of outlet connections 12, 13 on the instantaneous water heater 10 and their alternate and permanent alternative opening or closing by means of the reversing device 20 also enables a very simple construction of the reversing device 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Detergent Compositions (AREA)

Abstract

A household dishwasher, includes a dishwashing compartment, a circulating pump for delivering liquid to the dishwashing compartment, a flow heater having an inflow connection fluidically connected to the circulating pump and at least two outlet connections, spray devices disposed in the dishwashing compartment and fluidically connected to outlet connections for supplying the liquid to each of the spray devices, and a changeover device for selectively opening and closing the spray devices. The spray devices subject items disposed in the dishwashing compartment and to be cleaned to an action of a liquid delivered by the circulating pump. The changeover device is disposed in a non-restricting location at the flow heater upstream of the outlet connections with respect to a liquid flow direction and opens and/or closes one of the outlet connections or a number of outlet connections or all the outlet connections are alternately one after the other and/or on a permanent basis. A method is also provided.

Description

Haushalt-Geschirrspülmaschine Household dishwasher
Die Erfindung betrifft eine Haushalt-Geschirrspülmaschine mit einem Spülbehälter mit wenigstens zwei Sprüheinrichtungen, die in dem Spülbehälter angeordnetes, zu reini- gendes Gut mittels einer von einer Umwälzpumpe geförderten Flüssigkeit beaufschlagen.The invention relates to a domestic dishwasher with a washing container with at least two spray devices which act on the items to be cleaned which are arranged in the washing container by means of a liquid conveyed by a circulating pump.
Eine Haushalt-Geschirrspülmaschine der eingangs genannten Art ist z.B. aus der DE-OS 24 28 991 bekannt. Bei handelsüblichen Haushalt-Geschirrspülmaschinen werden die wenigstens zwei Sprüheinrichtungen gleichzeitig mit der von einer Umwälzpumpe geförderten Flüssigkeit beschickt. Bei der Haushalt-Geschirrspülmaschine nach der DE-OS 24 28 991 wird aber zur Erzielung eines gleichen oder besseren Reinigungsergebnisses wie bei den vorgeschilderten handelsüblichen Haushalt- Geschirrspülmaschinen jede Sprüheinrichtung wechselnd nacheinander mit der von ei- ner Umwälzpumpe geförderten Flüssigkeit beschickt, um so den vollen Druck der Umwälzpumpe nur an einer Sprüheinrichtung wirken zu lassen und eine geringere Flüssigkeitsmenge und geringere Energie zum Umwälzen und auch zum Erwärmen der umgewälzten Flüssigkeit zu benötigen. Zur Durchführung eines derartigen Verfahrens der wechselweisen Beschickung der Sprüheinrichtungen werden Umsteuereinrichtun- gen, üblicherweise sogenannte Wasserweichen, verwendet.A household dishwasher of the type mentioned is e.g. known from DE-OS 24 28 991. In commercial household dishwashers, the at least two spray devices are simultaneously charged with the liquid conveyed by a circulating pump. In the household dishwasher according to DE-OS 24 28 991, however, to achieve the same or better cleaning result as in the above-mentioned commercial household dishwashers, each spray device is alternately charged with the liquid conveyed by a circulating pump, in order to achieve the full pressure to let the circulating pump act only on one spray device and to require a smaller amount of liquid and less energy for circulating and also for heating the circulated liquid. Reversal devices, usually so-called water switches, are used to carry out such a method of alternately loading the spray devices.
Aus der EP-OS 05 47 01 1 ist beispielsweise bekannt, mittels eines hydraulisch betätigten, zwischen Flüssigkeitszuleitungen zu den Sprüheinrichtungen angeordneten Klappenventils wechselweise eine der Flüssigkeitszuleitungen zu öffnen und gleichzei- tig die anderen Flüssigkeitszuleitungen zu schließen, wobei diese Umsteuereinrichtung ein gesondertes Gehäuse besitzt und im Leitungszug der Flüssigkeitszuleitungen angeordnet ist.From EP-OS 05 47 01 1 it is known, for example, to alternately open one of the liquid supply lines and to simultaneously close the other liquid supply lines by means of a hydraulically operated flap valve arranged between liquid supply lines to the spraying devices, this reversing device having a separate housing and in Cable routing of the liquid supply lines is arranged.
Aus der EP-OS 02 37 994 ist weiterhin beispielsweise bekannt, mittels einer Kugel im Druckstutzen der Umwälzpumpe, die bei Unterbrechung des Betriebes der Umwälzpumpe die Lage ändert, wechselweise eine der Flüssigkeitszuleitungen zu öffnen und die andere gleichzeitig zu schließen. Ferner ist beispielsweise aus dem EP-PS 05 85 905 bekannt, mittels einer motorisch angetriebenen, sich drehenden horizontalen Scheibe mit Bohrungen einen oder mehrere Zugänge zu Flüssigkeitszuleitungen zu öffnen und andere zu schließen, wobei diese Umsteuereinrichtung ein gesondertes Gehäuse besitzt und im Leitungszug der Flüssigkeitszuleitungen angeordnet ist.From EP-OS 02 37 994 it is also known, for example, to alternately open one of the liquid supply lines and to close the other at the same time by means of a ball in the pressure port of the circulation pump, which changes position when the operation of the circulation pump is interrupted. Furthermore, it is known, for example from EP-PS 05 85 905, to open and close one or more accesses to liquid supply lines by means of a motor-driven, rotating horizontal disc with bores, this reversing device having a separate housing and being arranged in the line of the liquid supply lines is.
Die vorgenannten Lösungen der Umsteuereinrichtungen sind an schwer zugänglichen Stellen der Haushalt-Geschirrspülmaschine angeordnet und damit schwer zu montieren und/oder benötigen ein gesondertes Gehäuse, das an einer, die bei einer Haus- halt-Geschirrspülmaschine ohnehin beengten Platzverhältnisse, zusätzlich beengenden Stelle der Haushalt-Geschirrspülmaschine, z.B. im Zuge der Flüssigkeitszuleitungen, angeordnet werden muß.The above-mentioned solutions of the reversing devices are arranged in places of the household dishwasher which are difficult to access and are therefore difficult to assemble and / or require a separate housing which is located in a place in the household which is in addition cramped in a household dishwasher, Dishwasher, e.g. in the course of the liquid supply lines, must be arranged.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Haushalt-Geschirrspülmaschine der eingangs genannten Art mit einer an einer nicht beengenden Stelle angeordneten Umsteuereinrichtung zur Beschickung von Sprüheinrichtungen zu schaffen.The invention is therefore based on the object of providing a household dishwasher of the type mentioned at the beginning with a reversing device arranged at a non-constricting point for loading spray devices.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die geförderte Flüssigkeit von der Umwälzpumpe zu einem Zulaufstutzen eines Durchlauferhitzers und durch den Durchlauferhitzer geleitet wird, wobei der Durchlauferhitzer wenigstens zwei Ausgangsstutzen zur Zuleitung der Flüssigkeit zu jeweils unterschiedlichen Sprüheinrichtungen aufweist, die mittels einer am Durchlauferhitzer, in Strömungsrichtung vor den Ausgangsstutzen angeordneten Umsteuereinrichtung derart geöffnet bzw. geschlossen werden können, daß entweder jeweils einer der Ausgangsstutzen oder eine Anzahl von Ausgangsstutzen oder alle Ausgangsstutzen abwechselnd nacheinander und/oder ständig geöffnet bzw. geschlossen sind.This object is achieved in that the liquid conveyed from the circulating pump to an inlet port of a flow heater and through the flow heater, the flow heater having at least two outlet ports for supplying the liquid to different spraying devices, which by means of a flow heater, in the direction of flow can be opened or closed in front of the outlet port reversing device such that either one of the outlet ports or a number of outlet ports or all outlet ports are alternately successively and / or continuously opened or closed.
Dadurch, daß die Umsteuereinrichtung direkt am Ausgang des ohnehin vorhandenen Durchlauferhitzers praktisch in der Verlängerung des Ausgangsstutzens angeordnet ist, ist die Umsteuereinrichtung an einer gut zugänglichen und nicht beengenden Stelle der Haushalt-Geschirrspülmaschine angeordnet und damit leicht montierbar. Mit der Erfindung ist es gelungen, eine Haushalt-Geschirrspülmaschine der eingangs genannten Art mit einer an einer nicht beengenden Stelle angeordneten Umsteuereinrichtung zur Beschickung von Sprüheinrichtungen zu schaffen. Durch die Anordnung mehrerer Ausgangsstutzen und deren wechselseitigen als auch ständigen alternativen Öffnung bzw. Schließung mittels der Umsteuereinrichtung ist weiterhin ein sehr einfacher Aufbau der Umsteuereinrichtung möglich.Characterized in that the changeover device is arranged practically in the extension of the outlet port directly at the outlet of the instantaneous water heater, the changeover device is arranged at an easily accessible and non-constricting point of the household dishwasher and is therefore easy to assemble. The invention has succeeded in creating a household dishwasher of the type mentioned at the outset with a reversing device arranged at a non-constricting point for loading spray devices. By the arrangement Several outlet ports and their mutual and permanent alternative opening or closing by means of the reversing device, a very simple construction of the reversing device is still possible.
Zweckmäßigerweise entspricht die Anzahl der Ausgangsstutzen des Durchlauferhitzers der Anzahl der Sprüheinrichtungen oder gleichzeitig betriebener Gruppen von Sprüheinrichtungen.The number of outlet connections of the instantaneous heater expediently corresponds to the number of spray devices or groups of spray devices operated simultaneously.
Nach einer bevorzugten Ausführungsform der Erfindung weist der Durchlauferhitzer zwei Ausgangsstutzen auf.According to a preferred embodiment of the invention, the flow heater has two outlet connections.
Nach einem bevorzugten Merkmal der Erfindung kann eine jedem Ausgangsstutzen vorgelagerte Ausgangsöffnung des Durchlauferhitzers mittels eines in Strömungsrichtung vor den Ausgangsöffnungen angeordneten Drehschiebers der Umsteuereinrichtung ver- schlössen werden. Die eingangs beschriebenen, bekannten Umsteuereinrichtungen weisen auch den Nachteil auf, daß sie kompliziert aufgebaut und daher leicht störungsanfällig sind. Dieser Nachteil wird mit dem bevorzugten Merkmal der Erfindung überwunden, da auch z.B. Verschmutzungsablagerungen eine Schließfunktion des Drehschiebers nicht stören können, da sie von dem sich drehenden Drehschieber weggeschoben werden.According to a preferred feature of the invention, an outlet opening of the continuous-flow heater located in front of each outlet nozzle can be closed by means of a rotary valve of the reversing device arranged in the flow direction in front of the outlet openings. The known reversing devices described at the outset also have the disadvantage that they have a complicated structure and are therefore easily prone to failure. This disadvantage is overcome with the preferred feature of the invention, since e.g. Contamination deposits cannot interfere with a closing function of the rotary valve, since they are pushed away by the rotating rotary valve.
Nach einer bevorzugten Ausführungsform der Erfindung weist der Drehschieber wenigstens einen geschlossenen Bereich und wenigstens einen durch eine Bohrung offenen Bereich auf, wodurch eine einfache Herstellung des Drehschiebers erreicht wird.According to a preferred embodiment of the invention, the rotary slide valve has at least one closed area and at least one area open through a bore, whereby simple manufacture of the rotary slide valve is achieved.
Nach einer weiteren bevorzugten Ausführungsform der Erfindung weist der Drehschieber in Umlaufrichtung jeweils abwechselnd nach einem offenen Bereich einen geschlossenen Bereich auf, zwischen denen ein unausgefüllter Abstand besteht wodurch eine weitere Vereinfachung der Herstellung des Drehschiebers und eine einfache Steuerung des Umlaufes des Drehschiebers erreicht wird.According to a further preferred embodiment of the invention, the rotary slide valve alternately has a closed area alternately after an open area, between which there is an empty space, which further simplifies the manufacture of the rotary slide valve and simple control of the rotation of the rotary slide valve.
Nach einer weiteren bevorzugten Ausführungsform der Erfindung wird der Drehschieber mittels einer Antriebseinrichtung in wenigstens eine Stellung gebracht, in der der wenigstens eine geschlossene Bereich oder eine Anzahl von geschlossenen Bereichen die wenigstens eine Ausgangsöffnung oder eine Anzahl von Ausgangsöffnungen verschließt und/oder in der sämtliche Ausgangsöffnungen geöffnet sind. Damit ist der Drehschieber für alle möglichen Beschickungsarten der Sprüheinrichtungen verwendbar.According to a further preferred embodiment of the invention, the rotary slide valve is brought into at least one position by means of a drive device in which the at least one closed area or a number of closed areas closes the at least one exit opening or a number of exit openings and / or in which all exit openings are open. This means that the rotary valve can be used for all possible types of loading of the spray devices.
Vorteilhafterweise weist der Drehschieber die Form eines Propellerflügels mit zwei sich gegenüberliegenden Bereichen auf, der mittels der Antriebseinrichtung in eine Stellung gebracht wird, in der der geschlossene Bereich eine Ausgangsöffnung verschließt und der offene Bereich die jeweils andere Ausgangsöffnung geöffnet hält. Dies ist die einfachste Steuerung für den einfachsten Fall bei einer Haushalt-Geschirrspülmaschine mit der wechselweisen Beschickung der Sprüheinrichtungen, nämlich mit zwei Sprüheinrich- tungen.The rotary slide valve advantageously has the shape of a propeller blade with two opposing regions, which is brought into a position by means of the drive device in which the closed region closes an outlet opening and the open region keeps the other outlet opening open. This is the simplest control for the simplest case in a household dishwasher with the alternate loading of the spray devices, namely with two spray devices.
In besonders vorteilhafter Weise weist der Drehschieber auf den Bereichen umlaufende, in Einbaulage in Richtung auf die Ausgangsöffnungen hochragende Rippen auf, die einen halbkreisförmigen Querschnitt aufweisen. Mit dieser Maßnahme wird eine gute eine Aus- gangsöffnung umgebende Anlage des Drehschiebers auf der Innenwand des Druchlauf- erhitzers und damit eine gute Abdichtung der zu verschließenden Ausgangsöffnung erreicht.In a particularly advantageous manner, the rotary slide valve has circumferential ribs which protrude in the installed position in the direction of the outlet openings and which have a semicircular cross section. With this measure, a good contact of the rotary slide valve surrounding an outlet opening on the inner wall of the continuous flow heater is achieved, and thus a good seal of the outlet opening to be closed.
Nach einer vorteilhaften Ausführungsform der bevorzugten Ausführungsform der Erfin- dung ist die Antriebseinrichtung ein Motor mit Getriebe. Ein Motor mit Getriebe ist eine für den kontinuierlichen Wechsel in der Beschickung der Sprüheinrichtungen ebenso wie für einen zeitlich längeren Wechsel oder für eine ständige Öffnung eines oder mehrerer Zuführleitungen zu den Sprüheinrichtungen äußerst einfach steuerbare Antriebseinheit der Umsteuereinrichtung, womit eine weitere Vereinfachung der Umsteuereinrichtung erzielt wurde.According to an advantageous embodiment of the preferred embodiment of the invention, the drive device is a motor with a gear. A motor with a gearbox is a drive unit of the reversing device that is extremely easy to control for the continuous change in the loading of the spraying devices as well as for a longer change in time or for a permanent opening of one or more supply lines to the spraying devices, which further simplifies the reversing device.
Wie eingangs beschrieben, wird eine kontinuierliche, wechselweise Beschickung der Sprüheinrichtungen insbesondere zur Einsparung von Wasser eingesetzt. Bei geringerer Einfüllmenge kommt es aber, auch bei kurzzeitigem Betrieb beider Sprüheinrichtungen, zu einem schnellen Leerpumpen der Ansaugkammer der Umwälzpumpe, was dann aufgrund der Ansaugung von Luft zu einer unangenehmen und unerwünschten Geräuschentwicklung der Umwälzpumpe führt. Um diesem vorzubeugen, wird in besonders vorteilhafter Weise bei einer kontinuierlichen, wechselweisen Beschickung der Sprüheinrichtungen in den Zeiträumen in denen beide Ausgangsöffnungen geöffnet sind, die Drehzahl der Umwälzpumpe verringert. Die beschriebene Geräuschentwicklung aufgrund der Ansaugung von Luft kann mit dieser Maßnahme nicht eintreten, da die Ansauglei- stung der Umwälzpumpe soweit herabgesetzt wird, daß ein Leersaugen des Ansaugraumes der Umwälzpumpe nicht eintritt.As described at the beginning, a continuous, alternate loading of the spraying devices is used in particular to save water. With a lower filling quantity, however, even with brief operation of both spray devices, the suction chamber of the circulation pump is quickly emptied, which then leads to an unpleasant and undesirable noise development of the circulation pump due to the suction of air. To prevent this, in a particularly advantageous manner with a continuous, alternate loading of the spraying devices in the periods in which both outlet openings are open, the Circulation pump speed reduced. The described noise development due to the suction of air cannot occur with this measure, since the suction capacity of the circulation pump is reduced to such an extent that the suction space of the circulation pump is not sucked empty.
Die Erfindung wird nachstehend anhand dem in der Zeichnung dargestellten Ausführungsbeispiel erläutert. Es zeigenThe invention is explained below with reference to the embodiment shown in the drawing. Show it
Fig. 1 eine erfindungsgemäße Haushalt-Geschirrspülmaschine in ei- ner schematischer Darstellung,1 shows a household dishwasher according to the invention in a schematic representation,
Fig. 2 eine Schnittdarstellung der Seitenansicht eines Durchlauferhitzers mit der erfindungsgemäßen Umsteuereinrichtung,2 shows a sectional illustration of the side view of a continuous-flow heater with the reversing device according to the invention,
Fig. 3 eine Schnittdarstellung der Draufsicht des Durchlauferhitzers mit der erfindungsgemäßen Umsteuereinrichtung entsprechend den Schnittlinien lll-lll in Fig. 2 undFig. 3 is a sectional view of the top view of the water heater with the reversing device according to the invention according to the section lines III-III in Fig. 2 and
Fig. 4 eine vergrößerte Darstellung eines Teils der erfindungsgemäßen Umsteuereinrichtung entsprechend der Einzelheit IV in Fig. 2.4 shows an enlarged illustration of a part of the reversing device according to the invention corresponding to detail IV in FIG. 2.
Eine erfindungsgemäße Haushalt-Geschirrspülmaschine 1 weist einen Spülbehälter 2 auf, in den nicht dargestelltes, zu reinigendes Gut, z.B. verschmutztes Geschirr und Besteck, üblicherweise in Geschirrkörbe 3, 4 eingefüllt wird. In dem Spülbehälter 2 sind erfindungsgemäß wenigstens zwei Sprüheinrichtungen, in den gezeigten Ausführungsbeispielen zwei Sprüheinrichtungen 5, 6 angeordnet, die das in dem Spülbehälter 2 an- geordnete, zu reinigende Gut mit Flüssigkeit beaufschlagen. Diese Flüssigkeit, üblicherweise Spülflotte genannt, wird mittels einer Umwälzpumpe 7 in Flüssigkeitszuleitungen 8,A household dishwasher 1 according to the invention has a washing container 2, into which items to be cleaned, not shown, e.g. dirty dishes and cutlery, usually filled into crockery baskets 3, 4. According to the invention, at least two spray devices, in the exemplary embodiments shown two spray devices 5, 6 are arranged in the washing container 2, which act on liquid to be cleaned in the washing container 2. This liquid, usually called the rinsing liquor, is fed into liquid supply lines 8 by means of a circulation pump 7.
9 zu den Sprüheinrichtungen 5, 6 gefördert. Üblicherweise wird die in Haushalt- Geschirrspülmaschinen 1 geförderte Flüssigkeit zumindest in einem Teilprogrammabschnitt eines Spülprogrammes erwärmt, wozu die erfindungsgemäße Haushalt- Geschirrspülmaschine 1 einen Durchlauferhitzer 10 aufweist. Die in der erfindungsgemäßen Haushalt-Geschirrspülmaschine 1 geförderte Flüssigkeit wird von der Umwälzpumpe 7 zu einem Zulaufstutzen 11 des Durchlauferhitzers 10 und durch den Durchlauferhitzer9 promoted to the spray devices 5, 6. The liquid conveyed in household dishwashers 1 is usually heated at least in a sub-program section of a washing program, for which purpose the household dishwasher 1 according to the invention has a continuous-flow heater 10. The liquid conveyed in the household dishwasher 1 according to the invention is transferred from the circulating pump 7 to an inlet connection 11 of the instantaneous water heater 10 and through the instantaneous water heater
10 geleitet. Erfindungsgemäß weist der Durchlauferhitzer 10 wenigstens zwei Ausgangsstutzen, nämlich eine der Anzahl der Sprüheinrichtungen oder gleichzeitig betriebener Gruppen von Sprüheinrichtungen entsprechende Anzahl von Ausgangsstutzen, in den gezeigten Ausführungsbeispielen zwei Ausgangsstutzen 12, 13 auf. Von den Ausgangsstutzen 12, 13 des Durchlauferhitzers 10 wird die Flüssigkeit über die schon erwähnten Flüssigkeitszuleitungen 8, 9 den jeweils unterschiedlichen Sprüheinrichtungen 5, 6 zuge- leitet. Die zur Erwärmung der Flüssigkeit in dem Durchlauferhitzer 10 notwendigen Heizstäbe sind mit 16 bezeichnet.10 headed. According to the invention, the instantaneous water heater 10 has at least two outlet connections, namely one of the number of spray devices or operated simultaneously Groups of spraying devices have a corresponding number of outlet connections, in the exemplary embodiments shown two outlet connections 12, 13. From the outlet connections 12, 13 of the continuous-flow heater 10, the liquid is fed via the already mentioned liquid feed lines 8, 9 to the respective different spray devices 5, 6. The heating rods required for heating the liquid in the water heater 10 are designated by 16.
Erfindungsgemäß können die Ausgangsstutzen 12, 13 mittels einer am Durchlauferhitzer 10, in Strömungsrichtung vor den Ausgangsstutzen 12, 13 angeordneten Umsteuerein- richtung 20 derart geöffnet bzw. geschlossen werden, daß entweder jeweils einer der Ausgangsstutzen 12, 13 oder eine Anzahl von Ausgangsstutzen 12, 13 oder alle Ausgangsstutzen 12, 13 abwechselnd nacheinander und/oder ständig geöffnet bzw. geschlossen sind. Bei dem gezeigten Ausführungsbeispiel können die zwei Ausgangsstutzen 12, 13 des Durchlauferhitzers 10 mittels der Umsteuereinrichtung 20 derart geöffnet bzw. geschlossen werden, daß entweder jeweils einer der Ausgangsstutzen 12, 13 oder beide Ausgangsstutzen 12, 13 abwechselnd nacheinander und/oder ständig geöffnet bzw. geschlossen sind. Hierzu ist ein Drehschieber 21 der Umsteuereinrichtung 20 in Strömungsrichtung vor jedem Ausgangsstutzen 12, 13 vorgelagerten Ausgangsöffnungen 14, 15 des Durchlauferhitzers 10 angeordnet, durch den jeweils eine der Ausgangsöff- nungen 14, 15 des Durchlauferhitzers 10 verschlossen werden kann. Die eingangs beschriebenen, bekannten Umsteuereinrichtungen weisen auch den Nachteil auf, daß sie kompliziert aufgebaut und daher leicht störungsanfällig sind. Dieser Nachteil wird mit dem Drehschieber 21 überwunden, da auch z.B. Verschmutzungsablagerungen eine Schließfunktion des Drehschiebers 21 nicht stören können, da sie von dem sich drehenden Drehschieber 21 weggeschoben werden. Der Drehschieber 21 weist die Form eines Propellerflügels mit zwei sich gegenüberliegenden Bereichen 22, 23 auf, wobei der Drehschieber 21 einen geschlossenen Bereich 22 und einen durch eine Bohrung offenen Bereich 23 aufweist. Erfindungsgemäß wird der Drehschieber 21 mittels einer Antriebseinrichtung 30 in wenigstens eine Stellung gebracht, in der der wenigstens eine geschlosse- ne Bereich 22 oder eine Anzahl von geschlossenen Bereichen 22 die wenigstens eine Ausgangsöffnung 14, 15 oder eine Anzahl von Ausgangsöffnungen 14, 15 verschlossen und/oder in der sämtliche Ausgangsöffnungen 14, 15 geöffnet sind. Bei dem gezeigten Ausführungsbeispiel weist der Drehschieber 21 zwei sich gegenüberliegenden Bereiche 22, 23 auf, einen geschlossenen Bereich 22 und einen offenen Bereich 23. Der Dreh- Schieber 21 wird mittels der Antriebseinrichtung 30 in eine Stellung gebracht, in der der geschlossene Bereich 22 eine Ausgangsöffnung 15 verschließt und der offene Bereich 23 die andere Ausgangsöffnung 14 geöffnet hält. In Fig. 2 ist eine derartige Stellung dargestellt. Wie in Fig. 4 am besten zu erkennen ist weist der Drehschieber 21 auf den Berei- chen 22, 23 umlaufende, in Einbaulage in Richtung auf die Ausgangsöffnungen 14, 15 hochragende Rippen 24, 25 auf, die einen halbkreisförmigen Querschnitt aufweisen und zur besseren Anlage des Drehschiebers 21 auf der Innenwand des Druchlauferhitzers 10 dienen. Die Antriebseinheit 30 ist ein Motor 31 , z.B. ein Elektromotor, mit einem in Fig. 2 nur schematisch dargestellten Getriebe 32, z.B. einem Zahnradgetriebe. Der Drehschie- ber 21 ist mit dem Getriebe 32 mittels einer Welle 33 verbunden, die im Gehäuse des Durchlauferhitzers 10 geführt ist. Der Motor 30 und das Getriebe 32 sind durch einen auf einem hochgezogenen Rand 17 des Durchlauferhitzers 10 sitzenden Deckel 18 geschützt. Der Deckel 18 weist auch Lagerstelien für das Getriebe 32 auf, von denen nur ein hochgezogener Lagerzapfen 19 als Lager für die Welle 33 gezeigt ist.According to the invention, the outlet nozzles 12, 13 can be opened or closed by means of a reversing device 20 arranged on the flow heater 10 in the flow direction in front of the outlet nozzles 12, 13 such that either one of the outlet nozzles 12, 13 or a number of outlet nozzles 12, 13 each or all outlet connections 12, 13 are opened or closed alternately one after the other and / or continuously. In the exemplary embodiment shown, the two outlet ports 12, 13 of the instantaneous water heater 10 can be opened or closed by means of the reversing device 20 in such a way that either one of the outlet ports 12, 13 or both outlet ports 12, 13 alternately open and / or constantly open or closed are. For this purpose, a rotary slide valve 21 of the reversing device 20 is arranged in the flow direction in front of each outlet nozzle 12, 13 upstream outlet openings 14, 15 of the instantaneous water heater 10, through which one of the outlet openings 14, 15 of the instantaneous water heater 10 can be closed. The known reversing devices described at the outset also have the disadvantage that they have a complicated structure and are therefore easily prone to failure. This disadvantage is overcome with the rotary valve 21, since, for example, dirt deposits cannot interfere with the closing function of the rotary valve 21 since they are pushed away by the rotating rotary valve 21. The rotary valve 21 has the shape of a propeller blade with two areas 22, 23 lying opposite one another, the rotary valve 21 having a closed area 22 and an area 23 open through a bore. According to the invention, the rotary slide valve 21 is brought into at least one position by means of a drive device 30 in which the at least one closed area 22 or a number of closed areas 22 closes the at least one exit opening 14, 15 or a number of exit openings 14, 15 and / or in which all exit openings 14, 15 are open. In the exemplary embodiment shown, the rotary slide valve 21 has two opposing regions 22, 23, a closed region 22 and an open region 23. Slider 21 is brought into a position by means of the drive device 30, in which the closed area 22 closes an exit opening 15 and the open area 23 keeps the other exit opening 14 open. Such a position is shown in FIG. 2. As can best be seen in FIG. 4, the rotary slide valve 21 has, on the areas 22, 23, circumferential ribs 24, 25 projecting in the installed position in the direction of the outlet openings 14, 15, which have a semicircular cross section and for better contact serve the rotary valve 21 on the inner wall of the instantaneous water heater 10. The drive unit 30 is a motor 31, for example an electric motor, with a transmission 32, for example a gear transmission, which is shown only schematically in FIG. 2. The rotary valve 21 is connected to the gear 32 by means of a shaft 33 which is guided in the housing of the instantaneous water heater 10. The motor 30 and the gear 32 are protected by a cover 18 seated on a raised edge 17 of the instantaneous water heater 10. The cover 18 also has bearing positions for the gear 32, of which only one raised bearing journal 19 is shown as a bearing for the shaft 33.
Im folgenden wird die Funktion der erfindungsgemäßen Umsteuereinrichtung 20 an dem gezeigten Ausführungsbeispiel erläutert. Wenn eine kontinuierliche, wechselweise Beschickung der Sprüheinrichtungen 5, 6 gewünscht wird, so wird der Anschluß des Motors 31 der Antriebseinrichtung 30 an die Versorgungsspannung von einem nicht näher er- läuterten Programmsteuergerät der Haushalt-Geschirrspülmaschine 1 eingeleitet und der Drehschieber 21 beginnt sich zu drehen. Dadurch wird der geschlossene Bereich 22 des Drehschiebers 21 so lange gedreht, bis dieser auf einer der Ausgangsöffnungen 14, 15, in Fig. 2 auf der Ausgangsöffnung 15, dichtend aufliegt. Damit wird die Zuführung der durch den Durchlauferhitzer 10 strömenden Flüssigkeit in diesem Fall zu der unteren Sprüheinrichtung 6 unterbrochen und die Zuführung zu der oberen Sprüheinrichtung 5 geöffnet. Bei der kontinuierlichen, wechselweisen Beschickung der Sprüheinrichtungen 5, 6 dreht der Motor 31 kontinuierlich weiter, wodurch nach einer Drehung des Drehschiebers 21 um im Ausführungsbeispiel 180° der geschlossene Bereich 22 auf der Ausgangsöffnung 14 dichtend aufliegt. Damit wird die Zuführung zu der oberen Sprühein- richtung 5 unterbrochen und die Zuführung zu der unteren Sprüheinrichtung 6 geöffnet. Beim kontinuierlichen Weiterdrehen des Motors 31 kommt nun wieder der geschlossene Bereich 22 zur Anlage auf der Ausgangsöffnung 15 und der Vorgang setzt sich wie vorgeschildert fort. Die Dauer der Öffnungs- bzw. Schließzeiten der einzelnen Zuführungen zu den Sprüheinrichtungen 5, 6 ist bei dieser Antriebsart der Umsteuereinrichtung direkt abhängig von der gewählten Drehzahl des Motors 31 bzw. der Auslegung des Getriebes 32. Da der Drehschieber 21 in Umlaufrichtung jeweils abwechselnd nach einem offenen Bereich 23 einen geschlossenen Bereich 22 aufweist, zwischen denen ein unausgefüllter Abstand besteht, kommt, wie in Fig. 3 deutlich zu erkennen ist, der Drehschieber 21 bei seiner Drehung in eine Lage in der beide Ausgangsöffnungen 14, 15 geöffnet sind, wobei die Lage der in dieser Ansicht nicht sichtbaren Ausgangsöffnungen 14, 15 mit strichpunktierten Linien angedeutet ist. Dies bedeutet, daß für eine, abhängig von der Drehzahl des Drehschiebers 21 , relativ kurze Zeitdauer die Zuführung der durch den Durchlauferhitzer 10 strömenden Flüssigkeit zu beiden Sprüheinrichtungen 5, 6 stattfindet. Wie eingangs beschrieben, wird eine kontinuierliche, wechselweise Beschickung der Sprüheinrichtungen 5, 6 insbesondere zur Einsparung von Wasser eingesetzt. Bei der gewählten geringeren Einfüllmenge kommt es aber bei Betrieb beider Sprüheinrichtungenδ, 6, auch bei kurzzeitigem Betrieb beider Sprüheinrichtungen 5, 6, zu einem schnellen Leerpumpen der Ansaugkammer der Umwälzpumpe 7, was dann aufgrund der Ansaugung von Luft zu ei- ner unangenehmen und unerwünschten Geräuschentwicklung der Umwälzpumpe 7 führt. Um diesem vorzubeugen, wird in den Zeiträumen in denen beide Ausgangsöffnungen 14, 15 geöffnet sind, die Drehzahl der Umwälzpumpe 7 verringert, d.h. deren Ansaugleistung verringert, so daß die beschriebene Geräuschentwicklung nicht eintreten kann, da die Ansaugleistung der Umwälzpumpe 7 soweit herabgesetzt wird, daß ein Leersaugen des Ansaugraumes der Umwälzpumpe 7 nicht eintritt.The function of the reversing device 20 according to the invention is explained below using the exemplary embodiment shown. If a continuous, alternate loading of the spray devices 5, 6 is desired, the connection of the motor 31 of the drive device 30 to the supply voltage is initiated by a program control unit of the household dishwasher 1, which is not explained in detail, and the rotary slide valve 21 begins to rotate. As a result, the closed region 22 of the rotary slide valve 21 is rotated until it lies sealingly on one of the outlet openings 14, 15, in FIG. 2 on the outlet opening 15. In this case, the supply of the liquid flowing through the instantaneous water heater 10 to the lower spray device 6 is interrupted and the supply to the upper spray device 5 is opened. When the spray devices 5, 6 are fed continuously, alternately, the motor 31 continues to rotate, as a result of which, after the rotary slide valve 21 has been rotated by 180 ° in the exemplary embodiment, the closed region 22 lies sealingly on the outlet opening 14. The supply to the upper spray device 5 is thus interrupted and the supply to the lower spray device 6 is opened. When the motor 31 continues to rotate, the closed area 22 comes to rest on the exit opening 15 and the process continues as described above. The duration of the opening and closing times of the individual feeds to the spray devices 5, 6 is direct in this type of drive of the reversing device depending on the selected speed of the motor 31 or the design of the transmission 32. Since the rotary slide valve 21 has a closed area 22 alternately after an open area 23 in the direction of rotation, between which there is an empty space, as can be seen in FIG. 3 It can be seen that the rotary slide valve 21 rotates into a position in which both outlet openings 14, 15 are open, the position of the outlet openings 14, 15 not visible in this view being indicated by dash-dotted lines. This means that for a relatively short period of time, depending on the speed of the rotary slide valve 21, the liquid flowing through the instantaneous water heater 10 is supplied to both spray devices 5, 6. As described at the beginning, a continuous, alternate loading of the spray devices 5, 6 is used in particular to save water. With the selected lower filling quantity, however, when the two spray devices δ, 6 are operated, even when the two spray devices 5, 6 are operated for a short time, the suction chamber of the circulating pump 7 is quickly emptied, which then leads to an unpleasant and undesirable noise development due to the suction of air the circulation pump 7 leads. To prevent this, in the periods in which both outlet openings 14, 15 are open, the speed of the circulation pump 7 is reduced, that is, the suction power thereof is reduced, so that the noise development described cannot occur because the suction power of the circulation pump 7 is reduced to such an extent that an empty suction of the suction space of the circulation pump 7 does not occur.
Wenn aber eine kontinuierliche, wechselweise Beschickung der Sprüheinrichtungen 5, 6 gewünscht wird, bei der die Beschickung der einzelnen Sprüheinrichtungen 5, 6 länger als über die mit dem vorbeschriebenen Verfahren dauern soll, so wird mittels einer nicht näher beschriebenen Sensorik die Drehlage des Drehschiebers 21 festgestellt und über das Programmsteuergerät für eine vorgegebene Dauer der Motor 31 abgeschaltet, so daß die jeweilige Drehlage des Drehschiebers 21 über diese Dauer gehalten wird.However, if a continuous, alternate loading of the spray devices 5, 6 is desired, in which the loading of the individual spray devices 5, 6 is to take longer than with the method described above, the rotational position of the rotary slide valve 21 is determined by means of a sensor system (not described in more detail) and the program control device switches off the motor 31 for a predetermined duration, so that the respective rotational position of the rotary valve 21 is maintained for this duration.
Wird aber eine ständige Öffnung nur der Zuführung z.B. zu der oberen Sprüheinrichtung 5 gewünscht - ein sogenanntes Oberkorbspülen, so wird die vorbeschriebene Sensorik dazu benutzt, den Motor 31 nur so lange zu betreiben, bis die Stellung der Öffnung der Ausgangsöffnung 14 für den Ausgangsstutzen 12 zu der Flüßigkeitszuleitung 8 zu der oberen Sprüheinrichtung 5 erreicht ist und dann über das komplette Spülprogramm diese Stellung einzubehalten, da der Motor 31 nicht mehr weiter betrieben wird. Wird letztlich der ununterbrochene Betrieb beider Sprüheinrichtungen gewünscht, so läßt sich wieder mittels der vorbeschriebenen Sensorik die Zwischenstellung der Öffnung beider Ausgangsöffnungen 14, 15 feststellen und diese Stellung über das komplette Spül- programm beibehalten, da der Motor 31 nicht mehr weiter betrieben wird (siehe Fig. 3). Die Füllmenge mit Spülflüssigkeit wird entsprechend erhöht.However, if a constant opening of only the feed, for example to the upper spray device 5 is desired - a so-called upper basket rinsing, the sensor system described above is used to operate the motor 31 only until the position of the opening of the outlet opening 14 for the outlet nozzle 12 closes the liquid supply line 8 to the upper spray device 5 is reached and then to maintain this position through the complete washing program, since the motor 31 is no longer operated. If ultimately the uninterrupted operation of both spraying devices is desired, the intermediate position of the opening of both outlet openings 14, 15 can be determined again by means of the sensor system described above and this position can be maintained over the complete washing program since the motor 31 is no longer operated (see FIG 3). The filling quantity with rinsing liquid is increased accordingly.
Durch die Anordnung der Umsteuereinrichtung 20 an dem Durchlauferhitzer 10 ist es mit der Erfindung gelungen, eine Haushalt-Geschirrspülmaschine 1 mit einer an einer nicht beengenden Stelle angeordneten Umsteuereinrichtung 20 zur Beschickung von Sprüheinrichtungen 5, 6 zu schaffen. Durch die Anordnung mehrerer Ausgangsstutzen 12, 13 an dem Durchlauferhitzer 10 und deren wechselseitigen als auch ständigen alternativen Öffnung bzw. Schließung mittels der Umsteuereinrichtung 20 ist weiterhin ein sehr einfacher Aufbau der Umsteuereinrichtung 20 möglich. By arranging the reversing device 20 on the continuous-flow heater 10, the invention has succeeded in creating a household dishwasher 1 with a reversing device 20 arranged at a non-constricting point for loading spray devices 5, 6. The arrangement of a plurality of outlet connections 12, 13 on the instantaneous water heater 10 and their alternate and permanent alternative opening or closing by means of the reversing device 20 also enables a very simple construction of the reversing device 20.

Claims

Patentansprüche claims
1. Haushalt-Geschirrspülmaschine mit einem Spülbehälter mit wenigstens zwei Sprüheinrichtungen, die in dem Spülbehälter angeordnetes, zu reinigendes Gut mittels einer von einer Umwälzpumpe geförderten Flüssigkeit beaufschlagen, d a d u r c h g e k e n n z e i c h n e t , daß die geförderte Flüssigkeit von der Umwälzpumpe (7) zu einem Zulaufstutzen1. Household dishwasher with a rinsing container with at least two spray devices which act on the items to be cleaned arranged in the rinsing container by means of a liquid conveyed by a circulating pump, so that the conveyed liquid from the circulating pump (7) to an inlet connection
(1 1) eines Durchlauferhitzers (10) und durch den Durchlauferhitzer (10) geleitet wird, wobei der Durchlauferhitzer (10) wenigstens zwei Ausgangsstutzen (12, 13) zur Zuleitung der Flüssigkeit zu jeweils unterschiedlichen Sprüheinrichtungen (5, 6) aufweist, die mittels einer am Durchlauferhitzer (10), in Strömungsrichtung vor den Ausgangsstutzen (12, 13) angeordneten Umsteuereinrichtung (20) derart geöffnet bzw. geschlossen werden können, daß entweder jeweils einer der Ausgangsstutzen (12, 13) oder eine Anzahl von Ausgangsstutzen (12, 13) oder alle Ausgangsstutzen (12, 13) abwechselnd nacheinander und/oder ständig geöffnet bzw. geschlossen sind.(1 1) of a water heater (10) and through the water heater (10), wherein the water heater (10) has at least two outlet ports (12, 13) for supplying the liquid to different spray devices (5, 6), which by means of a reversing device (20) arranged on the flow heater (10) in the flow direction upstream of the outlet ports (12, 13) can be opened or closed such that either one of the outlet ports (12, 13) or a number of outlet ports (12, 13 ) or all outlet connections (12, 13) are alternately opened and / or continuously opened or closed.
2. Haushalt-Geschirrspülmaschine nach Anspruch 1 , dadurch gekennzeichnet, daß die Anzahl der Ausgangsstutzen (12, 13) des Durchlauferhitzers (10) der Anzahl der Sprüheinrichtungen (5, 6) oder gleichzeitig betriebener Gruppen von Sprüheinrichtungen (5, 6) entspricht.2. Household dishwasher according to claim 1, characterized in that the number of outlet ports (12, 13) of the instantaneous water heater (10) corresponds to the number of spray devices (5, 6) or groups of spray devices (5, 6) operated simultaneously.
3. Haushalt-Geschirrspülmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Durchlauferhitzer (10) zwei Ausgangsstutzen (12, 13) aufweist.3. Household dishwasher according to claim 1 or 2, characterized in that the water heater (10) has two outlet ports (12, 13).
4. Haushalt-Geschirrspülmaschine nach einem der Ansprüche 1 bis 3, dadurch ge- kennzeichnet, daß eine jedem Ausgangsstutzen (12, 13) vorgelagerte Ausgangsöffnung (14, 15) des Durchlauferhitzers (10) mittels eines in Strömungsrichtung vor den Ausgangsöffnungen (14, 15) angeordneten Drehschiebers (21) der Umsteuereinrichtung (20) verschlossen werden kann. 4. Household dishwasher according to one of claims 1 to 3, characterized in that an outlet opening (14, 15) upstream of each outlet nozzle (12, 13) of the instantaneous water heater (10) by means of a flow in front of the outlet openings (14, 15th ) arranged rotary valve (21) of the reversing device (20) can be closed.
5. Haushalt-Geschirrspülmaschine nach Anspruch 4, dadurch gekennzeichnet, daß der Drehschieber (21) wenigstens einen geschlossenen Bereich (22) und wenigstens einen durch eine Bohrung offenen Bereich (23) aufweist.5. Household dishwasher according to claim 4, characterized in that the rotary slide valve (21) has at least one closed area (22) and at least one area (23) open through a bore.
6. Haushalt-Geschirrspülmaschine nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Drehschieber (21) in Umlaufrichtung jeweils abwechselnd nach einem offenen Bereich (23) einen geschlossenen Bereich (22) aufweist, zwischen denen ein unausgefüllter Abstand besteht.6. Household dishwasher according to claim 4 or 5, characterized in that the rotary slide valve (21) alternately in the circumferential direction after an open area (23) has a closed area (22), between which there is an empty space.
7. Haushalt-Geschirrspülmaschine nach einem der Anspruch 4 bis 6, dadurch gekennzeichnet, daß der Drehschieber (21) mittels einer Antriebseinrichtung (30) in wenigstens eine Stellung gebracht wird, in der der wenigstens eine geschlossene Bereich (22) oder eine Anzahl von geschlossenen Bereichen (22) die wenigstens eine Ausgangsöffnung (14, 15) oder eine Anzahl von Ausgangsöffnungen (14, 15) verschlossen und/oder in der sämtliche Ausgangsöffnungen (14, 15) geöffnet sind.7. Household dishwasher according to one of claims 4 to 6, characterized in that the rotary slide valve (21) is brought into at least one position by means of a drive device (30) in which the at least one closed area (22) or a number of closed Areas (22) which close at least one exit opening (14, 15) or a number of exit openings (14, 15) and / or in which all exit openings (14, 15) are open.
8. Haushalt-Geschirrspülmaschine nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß der Drehschieber (21) die Form eines Propellerflügels mit zwei sich gegenüberliegenden Bereichen (22, 23) aufweist, der mittels der Antriebseinrichtung (30) in eine Stellung gebracht wird, in der der geschlossene Bereich (22) eine Ausgangsöffnung (14, 15) verschließt und der offene Bereich (23) die jeweils andere Ausgangsöffnung geöffnet hält.8. Household dishwasher according to one of claims 4 to 7, characterized in that the rotary slide valve (21) has the shape of a propeller wing with two opposite regions (22, 23) which is brought into a position by means of the drive device (30) , in which the closed area (22) closes an exit opening (14, 15) and the open area (23) keeps the other exit opening open.
9. Haushalt-Geschirrspülmaschine nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß der Drehschieber (21) auf den Bereichen (22, 23) umlaufende, in Einbaulage in Richtung auf die Ausgangsöffnungen (14, 15) hochragende Rippen (24, 25) aufweist, die einen halbkreisförmigen Querschnitt aufweisen.9. Household dishwasher according to one of claims 4 to 8, characterized in that the rotary slide (21) on the areas (22, 23) revolving, in the installed position in the direction of the outlet openings (14, 15) projecting ribs (24, 25th ) which have a semicircular cross section.
10. Haushalt-Geschirrspülmaschine nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, daß die Antriebseinrichtung (30) ein Motor (31) mit Getriebe (32) ist.10. Household dishwasher according to one of claims 4 to 9, characterized in that the drive device (30) is a motor (31) with gear (32).
11. Haushalt-Geschirrspülmaschine nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß bei einer kontinuierlichen, wechselweisen Beschickung der Sprüheinrichtungen (5, 6) in den Zeiträumen in denen beide Ausgangsöffnungen (14, 15) geöffnet sind, die Drehzahl der Umwälzpumpe (7) verringert wird. 11. Household dishwasher according to one of claims 1 to 10, characterized in that with a continuous, alternate loading of the Spray devices (5, 6) in the periods in which both outlet openings (14, 15) are open, the speed of the circulation pump (7) is reduced.
EP99966925A 1998-12-10 1999-12-07 Household dishwasher Expired - Lifetime EP1137362B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19857103A DE19857103A1 (en) 1998-12-10 1998-12-10 Household dishwasher
DE19857103 1998-12-10
PCT/EP1999/009613 WO2000033720A2 (en) 1998-12-10 1999-12-07 Household dishwasher

Publications (2)

Publication Number Publication Date
EP1137362A2 true EP1137362A2 (en) 2001-10-04
EP1137362B1 EP1137362B1 (en) 2003-04-23

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EP99966925A Expired - Lifetime EP1137362B1 (en) 1998-12-10 1999-12-07 Household dishwasher

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US (1) US6601593B2 (en)
EP (1) EP1137362B1 (en)
AT (1) ATE237986T1 (en)
DE (2) DE19857103A1 (en)
ES (1) ES2196913T3 (en)
TR (1) TR200101276T2 (en)
WO (1) WO2000033720A2 (en)

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Also Published As

Publication number Publication date
WO2000033720A3 (en) 2000-10-12
DE59905236D1 (en) 2003-05-28
DE19857103A1 (en) 2000-06-15
WO2000033720A2 (en) 2000-06-15
ATE237986T1 (en) 2003-05-15
ES2196913T3 (en) 2003-12-16
US20020007843A1 (en) 2002-01-24
TR200101276T2 (en) 2001-10-22
US6601593B2 (en) 2003-08-05
EP1137362B1 (en) 2003-04-23

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