EP2416694B1 - Water-conducting household appliance, particularly a dishwasher - Google Patents
Water-conducting household appliance, particularly a dishwasher Download PDFInfo
- Publication number
- EP2416694B1 EP2416694B1 EP10709497.1A EP10709497A EP2416694B1 EP 2416694 B1 EP2416694 B1 EP 2416694B1 EP 10709497 A EP10709497 A EP 10709497A EP 2416694 B1 EP2416694 B1 EP 2416694B1
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- EP
- European Patent Office
- Prior art keywords
- pump
- operating mode
- during
- household appliance
- water
- Prior art date
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- 238000013022 venting Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims 4
- 230000004075 alteration Effects 0.000 claims 2
- 238000009423 ventilation Methods 0.000 claims 2
- 239000007788 liquid Substances 0.000 description 32
- 238000011161 development Methods 0.000 description 10
- 230000000740 bleeding effect Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
- D06F39/085—Arrangements or adaptations of pumps
-
- 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
- A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/004—Priming of not self-priming pumps
- F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/02—Self-priming pumps
Definitions
- the solution is based on a water-conducting household appliance, in particular a dishwasher, at least comprising a pump, with which in at least one normal operating mode liquid is conveyed.
- the control device can control the liquid pump with a venting signal.
- the vent signal may preferably be located directly upstream of the actual start signal, so that after the venting, the actual start of operation of the liquid pump begins, in which the pump is continuously raised to the maximum flow rate.
- the jerky rotational movement of the impeller can be done without building up a fluid pressure with which a pressure-side check valve element is opened.
- the pressure-side check valve element separates the hydraulic circuit of the dishwasher from the sewage network.
- the drain pump 19 is shown out of service, so that the impeller 37 is stopped.
- a residual liquid column h builds up in the pump chamber 35, above which a gas bubble remains.
- the gas bubble is trapped in the upper apex area of the pump chamber 35 and in the transition to the pressure port 39.
- a impeller blade partially protrudes into the gas bubble.
- the drain pump 19 is activated during the wash cycle for a liquid change, which takes place after execution of a partial program step, such as the pre-wash, and before the start of the subsequent part program step, such as cleaning.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Textile Engineering (AREA)
- Washing And Drying Of Tableware (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Description
Die Erfindung betrifft ein wasserführendes Haushaltsgerät, insbesondere eine Geschirrspülmaschine, nach dem Oberbegriff des Patentanspruches 1.The invention relates to a water-conducting household appliance, in particular a dishwasher, according to the preamble of claim 1.
Bei wasserführenden Haushaltsgeräten sind ein geräuscharmes Betriebsverhalten sowie eine möglichst hohe Förderleistung von großer Bedeutung. Bspw. weist eine Geschirrspülmaschine eine Laugenpumpe auf, die ansaugseitig mit einem Pumpentopf verbunden ist. Eine Pumpenkammer, in der ein Pumpenrad läuft, ist im oberen Bereich über eine Entlüftungsöffnung mit dem Pumpentopf strömungstechnisch in Verbindung. Auf diese Weise kann nach einem Stillsetzen des Pumpenrades das sich oberhalb einer Restflüssigkeitssäule sammelnde Gas über die Entlüftungsöffnung in den Pumpentopf entweichen. Das Pumpenrad taucht dadurch tiefer in die Restflüssigkeit. Beim erneuten Einschalten erzielt daher die Laugenpumpe bei einem geräuscharmen Betriebsverhalten in einem kurzen Zeitraum ihre maximale Förderleistung. Nachteilig wird während des Pumpenbetriebes ein Teil der bereits im Pumpentopf filtrierten Spülflüssigkeitsmenge über die Entlüftungsöffnung wieder zurück in den Pumpentopf geführt, wodurch die Förderleistung der Laugenpumpe beeinträchtigt ist. Eine solche Lösung ist beispielsweise in der
Die
Die Aufgabe der Erfindung besteht darin, ein wasserführendes Haushaltsgerät, insbesondere eine Geschirrspülmaschine mit einer Pumpe bereitzustellen, welche eine verbesserte Förderleistung aufweist.The object of the invention is to provide a water-conducting domestic appliance, in particular a dishwasher with a pump, which has an improved delivery rate.
Die Lösung geht aus von einem wasserführendes Haushaltsgerät, insbesondere Geschirrspülmaschine, wenigstens aufweisend eine Pumpe, mit der in wenigstens einem Normalbetriebsmodus Flüssigkeit förderbar ist.The solution is based on a water-conducting household appliance, in particular a dishwasher, at least comprising a pump, with which in at least one normal operating mode liquid is conveyed.
Erfindungsgemäß ist die Pumpe durch einen vor dem Normalbetriebsmodus durchführbaren Entlüftungsbetriebsmodus entlüftbar ist, während dem eine Gasblase entgegen der Förderrichtung während des Normalbetriebsmodus wenigstens teilweise aus einer Pumpenkammer der Pumpe zu einem Flüssigkeitspumpenzulauf der Pumpe förderbar ist. Durch den Entlüftungsbetriebsmodus kann auf eine im Stand der Technik übliche Entlüftungsöffnung in der Pumpenkammer verzichtet werden. Dadurch kann keine bereits filtrierte Spülflüssigkeit wieder zurück in den Pumpentopf gelangen. Im Vergleich zur gattungsgemäßen Entlüftung von Pumpen wird durch den erfindungsgemäßen Entlüftungsbetriebsmodus die Förderleistung der Pumpe verbessert. Die Pumpe kann während des Entlüftungsbetriebsmodus diskontinuierlich betrieben werden und temporär eine geringere Förderleistung aufweisen als während des Normalbetriebs der Pumpe.According to the invention, the pump can be vented by a vent operating mode which can be carried out before the normal operating mode, during which a gas bubble can be conveyed against the conveying direction during the normal operating mode at least partially from a pump chamber of the pump to a liquid pump inlet of the pump. By the bleed mode of operation may be to one in the prior art usual vent in the pump chamber can be omitted. As a result, no already filtered rinsing liquid can get back into the sump. Compared to the generic venting of pumps, the delivery rate of the pump is improved by the vent operating mode according to the invention. The pump may be operated intermittently during the bleed mode of operation and may temporarily have a lower flow rate than during normal operation of the pump.
Hierzu wird in einer Weiterbildung während des Entlüftungsbetriebsmodus durch eine von der Pumpeerzeugte Ringströmung in der Pumpe die Gasblase wenigstens teilweise verdrängt. So kann die Gasblase in Richtung zu der Drehachse des Pumpenrades verdrängt werden, von wo aus sie schließlich zum Flüssigkeitspumpenzulauf gelangt.For this purpose, the gas bubble is at least partially displaced in a development during the vent mode by a generated by the pump ring flow in the pump. Thus, the gas bubble can be displaced in the direction of the axis of rotation of the impeller, from where it finally reaches the liquid pump inlet.
Dabei ist in einer Weiterbildung vorgesehen, dass die Drehrichtung der Pumpe während des Normalbetriebsmodus und des Entlüftungsbetriebsmodus gleich ist. Es ist also keine in zwei Richtungen betreibbarer Antrieb zum Antreiben der Pumpe erforderlich und damit auch keine entsprechend ausgebildete Steuerung zum Ansteuern des Antriebs der Pumpe.It is provided in a development that the direction of rotation of the pump during the normal operating mode and the vent operating mode is the same. Thus, it is not necessary to operate in two directions drive to drive the pump and thus no appropriately trained control for driving the drive of the pump.
Ferner ist in einer Weiterbildung vorgesehen, dass die Pumpe während des Entlüftungsbetriebsmodus mit einer anderen Drehzahlcharakteristik als während des Normalbetriebsmodus betreibbar ist.Furthermore, it is provided in a development that the pump during the Entlüftungsbetriebsmodus with a different speed characteristic than during normal operation mode is operable.
Hierzu ist in einer Weiterbildung vorgesehen, dass die Drehzahlcharakteristik während des Entlüftungsbetriebsmodus eine größere Drehzahlschwankungsbreite aufweist als während des Normalbetriebsmodus. D.h., die Drehzahl der Pumpe schwankt während des Normalbetriebsmodus und während des Entlüftungsbetriebsmodus zwischen einer die Drehzahlschwankungsbreite begrenzenden unteren und oberen Drehzahl. Diese Drehzahlschwankungsbreite ist während des Entlüftungsbetriebsmodus größer als während des Normalbetriebsmodus.For this purpose, it is provided in a development that the speed characteristic during the Entlüftungsbetriebsmodus has a larger speed fluctuation width than during the normal operating mode. That is, the speed of the pump fluctuates between a lower and upper speed limiting the speed fluctuation width during the normal operation mode and during the purge operation mode. This speed fluctuation width is greater during the bleed operation mode than during the normal operation mode.
Ferner ist in einer Weiterbildung vorgesehen, dass die Drehzahlcharakteristik während des Entlüftungsbetriebsmodus größere und/oder höhere Drehzahländerungen pro Zeiteinheit aufweist als während des Normalbetriebsmodus. D.h. die Drehzahl ändert sich während des Entlüftungsbetriebsmodus stärker als während des Normalbetriebsmodus, z.B. pro Sekunde oder Minute als Zeiteinheit.Furthermore, it is provided in a development that the speed characteristic during the Enttüftungsbetriebsmodus larger and / or higher speed changes per unit time than during the normal operating mode. That means the speed changes during the bleed mode more than during the normal mode, eg per second or minute as the unit of time.
Hierzu ist in einer Weiterbildung vorgesehen, dass die Pumpe während des Entlüftungsbetriebsmodus diskontinuierlich betreibbar ist. Es stellt sich dementsprechend keine kontinuierliche Strömung ein. Im Gegensatz dazu wird die Pumpe im Normalbetriebsmodus kontinuierlich betrieben, so dass sich während des Betriebs eine kontinuierliche Strömung einstellt.For this purpose, it is provided in a development that the pump can be operated discontinuously during the venting operating mode. Accordingly, there is no continuous flow. In contrast, the pump is operated continuously in the normal operating mode, so that during operation sets a continuous flow.
Des weiteren ist in einer Weiterbildung vorgesehen, dass die Pumpe während des Entlüftungsbetriebsmodus eine geringere Förderleistung aufweist als während des Normalbetriebsmodus der Pumpe.Furthermore, it is provided in a development that the pump has a lower delivery rate during the vent operating mode than during the normal operating mode of the pump.
Außerdem ist in einer Weiterbildung vorgesehen, dass der Flüssigkeitspumpenzulauf mit einem Pumpentopf einer als Laugenpumpe ausgebildeten Pumpe verbunden ist. Dabei dient die Laugenpumpe dazu, Flüssigkeit, wie z.B. verschmutzte Spülflotte aus dem wasserführenden Haushaltsgerät in ein hausseitiges Abwasserentsorgungssystem zu fördern.In addition, it is provided in a development that the liquid pump inlet is connected to a pump pot of a pump designed as a drain pump. In doing so, the suds pump serves to dispense liquid, e.g. contaminated rinse liquor from the water-conducting household appliance to promote a home-based sanitation system.
In einer Weiterbildung ist vorgesehen, dass ein Pumpenrad der Pumpe wenigstens zeitweise während des Entlüftungsbetriebsmodus zumindest eine ruckartige Drehbewegung ausführt. Gemäß einer Weiterbildung erfolgt der Entlüftungsbetriebsmodus durch entsprechende Ansteuerung der Flüssigkeitspumpe durch eine Steuereinrichtung. Im Entlüftungsbetrieb kann die nach dem Stillsetzen des Pumpenrades oberhalb einer Restflüssigkeitssäule verbleibende Gasblase zumindest teilweise zu einem Flüssigkeitspumpenzu- oder -ablauf verdrängt werden. Dies kann dadurch erfolgen, dass das Pumpenrad zur Ausführung zumindest einer ruckartigen Drehbewegung angesteuert wird. Dadurch gerät die Restflüssigkeitssäule in der Pumpenkammer in Bewegung, wodurch die Gasblase verdrängt wird. Durch die ruckartige Drehbewegung des Pumpenrades kann die Restflüssigkeitssäule unter kurzzeitigem Aufbau einer Ringströmung die Gasblase in Richtung einer Drehachse des Pumpenrades verdrängen. Die Gasblase kann daher zumindest teilweise über einen Zu- oder Ablaufstutzen der Flüssigkeitspumpe entweichen. Der Zu- oder Ablaufstutzen kann bevorzugt axial ausgerichtet bzw. koaxial zur Pumpenrad-Drehachse ausgerichtet sein.In a further development, it is provided that a pump wheel of the pump performs at least a jerky rotational movement at least temporarily during the venting operating mode. According to a further development, the bleeding mode of operation is effected by a corresponding control of the liquid pump by a control device. In bleeding mode, the gas bubble remaining after stopping the impeller above a residual liquid column can be at least partially displaced to a liquid pump feed or discharge. This can take place in that the impeller is driven to execute at least one jerky rotational movement. This causes the residual liquid column in the pump chamber to move, which displaces the gas bubble. Due to the jerky rotational movement of the impeller, the residual liquid column can displace the gas bubble in the direction of an axis of rotation of the impeller under a short-term structure of a ring flow. The gas bubble can therefore escape at least partially via an inlet or outlet nozzle of the liquid pump. The inlet or outlet connection can preferably be aligned axially or coaxially aligned with the impeller rotation axis.
Untersuchungen haben gezeigt, dass bei einer kurzzeitigen Erzeugung einer Ringströmung mit turbulentem Strömungsbild eine vergleichsweise große Gasmenge aus der Pumpenkammer verdrängt wird. Vor diesem Hintergrund kann die ruckartige Drehbewegung des Pumpenrades bis zu fünf Umdrehungen umfassen. Besonders bevorzugt ist jedoch, wenn das Pumpenrad um einen Drehwinkel bewegt wird, der kleiner als 360°, insbesondere kleiner als 240° oder 120° ist. Bei derart geringen Drehwinkeländerungen ist einerseits der Energieaufwand minimal. Andererseits ist auch die hierfür erforderliche Zeitdauer zur Durchführung der ruckartigen Drehbewegung minimal, die sich in einer Größenordnung von Sekundenbruchteilen bewegt.Investigations have shown that when a short-term generation of a ring flow with turbulent flow pattern, a comparatively large amount of gas is displaced from the pump chamber. Against this background, the jerky rotational movement of the impeller can include up to five revolutions. However, it is particularly preferred if the impeller is moved by a rotation angle which is smaller than 360 °, in particular smaller than 240 ° or 120 °. With such small rotational angle changes on the one hand, the energy consumption is minimal. On the other hand, the time period required for carrying out the jerky rotary movement, which is in the order of a fraction of a second, is also minimal.
Zur Aktivierung des Entlüftungsbetriebes der Flüssigkeitspumpe kann die Steuereinrichtung die Flüssigkeitspumpe mit einem Entlüftungssignal ansteuern. Das Entlüftungssignal kann bevorzugt dem eigentlichen Betriebsstartsignal unmittelbar vorgelagert sein, so dass nach erfolgter Entlüftung der eigentliche Betriebsstart der Flüssigkeitspumpe beginnt, bei dem die Pumpe kontinuierlich bis zur maximalen Förderleistung hochgefahren wird.To activate the venting operation of the liquid pump, the control device can control the liquid pump with a venting signal. The vent signal may preferably be located directly upstream of the actual start signal, so that after the venting, the actual start of operation of the liquid pump begins, in which the pump is continuously raised to the maximum flow rate.
Zum Antrieb der Flüssigkeitspumpe kann ein Gleichstrommotor eingesetzt werden, insbesondere ein bürstenloser Gleichstrommotor mit elektronischer Kommutation, d. h. ein BLDC-Motor. Der Gleichstrommotor kann mehrphasig, etwa zwei- oder dreiphasig, ausgeführt sein. Insbesondere bei Verwendung eines zwei- oder dreiphasig ausgeführten Gleichstrommotors kann die ruckartige Drehbewegung des Pumpenlaufrades mit genau vorgebbaren Drehwinkeln besonders einfach erzeugt werden, indem lediglich eine, oder im Fall eines dreiphasig ausgeführten Gleichstrommotors, lediglich zwei Phasen geschaltet werden.To drive the liquid pump, a DC motor can be used, in particular a brushless DC motor with electronic commutation, d. H. a BLDC motor. The DC motor can be multi-phase, about two- or three-phase, executed. In particular, when using a two- or three-phase DC motor, the jerky rotational movement of the pump impeller can be particularly easily generated with exactly predetermined rotation angles, only one, or in the case of a three-phase DC motor, only two phases are switched.
Damit die nach dem Entlüftungsbetrieb in der Pumpenkammer verbleibende Gasblase weitestgehend reduziert ist, kann eine Abfolge von, insbesondere bis zu drei ruckartigen Drehbewegungen, des Pumpenlaufrades ausgeführt werden. Die Drehbewegungen können in kurzen zeitlichen Unterbrechungen wiederholt werden, wobei eine Unterbrechungszeitdauer in der Größenordnung von etwa 0,3 s liegen kann. Die Durchführung der ruckartigen Drehbewegung des Pumpenlaufrades selbst erstreckt sich über eine kurze Zeitdauer in der Größenordnung von 0,1 s. Bei einer solchen Konstellation beträgt daher der gesamte Entlüftungsvorgang weniger als 1,5 s.Thus, the remaining after the venting operation in the pump chamber gas bubble is largely reduced, a sequence of, in particular up to three jerky rotational movements of the pump impeller can be performed. The rotational movements can be repeated in short time intervals, with an interruption time period of the order of about 0.3 s. The implementation of the jerky rotational movement of the pump impeller itself extends over a short period of time on the order of 0.1 s. In such a constellation, therefore, the entire venting process is less than 1.5 s.
In einer besonderen Ausführungsform kann die Flüssigkeitspumpe als eine Laugenpumpe in einer Geschirrspülmaschine eingesetzt werden. Die Laugenpumpe ist mit ihrem Pumpenzulauf mit einem Pumpentopf der Geschirrspülmaschine verbunden, in der die Gasblase nach erfolgter ruckartiger Bewegung des Pumpenlaufrades entweichen kann. Der Pumpenzulauf kann bevorzugt koaxial zur Drehachse des Pumpenlaufrades angeordnet sein.In a particular embodiment, the liquid pump can be used as a drain pump in a dishwasher. The drain pump is connected with its pump inlet to a sump of the dishwasher, in which the gas bubble can escape after jerky movement of the pump impeller. The pump inlet can preferably be arranged coaxially with the axis of rotation of the pump impeller.
Die ruckartige Drehbewegung des Pumpenrades kann ohne Aufbau eines Flüssigkeitsdruckes erfolgen, mit dem ein druckseitiges Rückschlagventilelement geöffnet wird. Im Falle der Laugenpumpe der Geschirrspülmaschine trennt das druckseitige Rückschlagventilelement den Hydraulikkreislauf der Geschirrspülmaschine vom Abwassernetz.The jerky rotational movement of the impeller can be done without building up a fluid pressure with which a pressure-side check valve element is opened. In the case of the washer of the dishwasher, the pressure-side check valve element separates the hydraulic circuit of the dishwasher from the sewage network.
Nachfolgend ist ein Ausführungsbeispiel der Erfindung anhand der beigefügten Figuren beschrieben.Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described.
Es zeigen:
- Fig. 1
- in einem schematischen Blockdiagramm eine Geschirrspülmaschine;
- Fig. 2
- in einer vergrößerten Schnittdarstellung den Pumpentopf der Geschirrspülmaschine mit zugeordneter Laugenpumpe;
- Fig. 3 und 4
- jeweils vergrößerte Darstellungen der in der
Fig. 2 gezeigten Schnittansicht bei stillgesetztem Pumpenlaufrad sowie bei Durchführung einer ruckartigen Bewegung des Pumpenlaufrades.
- Fig. 1
- in a schematic block diagram, a dishwasher;
- Fig. 2
- in an enlarged sectional view of the pump pot of the dishwasher with associated drain pump;
- 3 and 4
- in each case enlarged representations of in the
Fig. 2 shown sectional view with stopped pump impeller and when performing a jerky movement of the pump impeller.
In der
Der Pumpentopf 11 ist außerdem mit einer, mit dem Wasserversorgungsnetz gekoppelten Frischwasserzuleitung 17 sowie einer Ablaufleitung 18 in Verbindung, in der eine Laugenpumpe 19 zum Abpumpen verunreinigter Spülflüssigkeit aus dem Spülbehälter 1 geschaltet ist. Gemäß der
In dem Pumpentopf 11 ist ein Filtersystem zur Reinigung der im Hydraulikkreislauf umgewälzten Spülflüssigkeit vorgesehen. Das Filtersystem weist einen flächigen, trichterförmigen Feinfilter 21, der oberseitig auf dem Pumpentopf 11 sitzt, und einen mittig im Pumpentopf 11 eingesetzten hohlzylindrischen, topfförmigen Großfilter 22 auf.In the
Während eines Spülganges der Geschirrspülmaschine wird der Betrieb der Pumpen 13, 19 sowie weiterer, hier nicht gezeigter Gerätekomponenten von der Steuereinrichtung 23 gesteuert. Ein Spülgang kann Teilprogrammschritte mit bzw. ohne Flüssigkeitseinsatz, etwa Vorspülen, Reinigen, Zwischenspülen, Klarspülen und Trocknen, aufweisen.During a rinse cycle of the dishwasher, the operation of the
Zwischen zwei aufeinanderfolgenden Teilprogrammschritten mit Flüssigkeitseinsatz, etwa zwischen dem Vorspülen und dem Reinigen, erfolgt ein Spülflüssigkeitswechsel. Bei dem Spülflüssigkeitswechsel wird die nicht mehr benötigte, verunreinigte Spülflüssigkeit durch Inbetriebnahme der Laugenpumpe 19 aus dem Spülbehälter 1 in das Abwasserversorgungsnetz abgeleitet. Außerdem wird Frischwasser über die Frischwasserzuleitung in den Pumpentopf 11 eingeleitet.Between two successive partial program steps with liquid use, such as between the pre-rinsing and the cleaning, a rinsing liquid change takes place. In the rinsing liquid change, the no longer required, contaminated rinsing liquid is derived by putting the
In der
Die Laugenpumpe 19 wird beispielhaft mit einem dreiphasig ausgeführten bürstenlosen Gleichstrommotor 43 mit elektronischer Kommutation angetrieben. Der in den
In der
Die Laugenpumpe 19 wird während des Spülganges für einen Flüssigkeitswechsel aktiviert, der nach Ausführung eines Teilprogrammschrittes, etwa dem Vorspülen, und vor Beginn des darauffolgenden Teilprogrammschrittes, etwa dem Reinigen, stattfindet.The
Die in der Pumpenkammer 3 gefangene Gasblase erhöht die Zeitdauer, bis die Laugenpumpe 19 mit maximaler Förderleistung läuft. Es wird daher in einem Entlüftungsbetriebsmodus die Gasblase aus der Pumpenkammer 35 verdrängt. Der Entlüftungsbetriebsmodus findet unmittelbar vor dem eigentlichen Betrieb der Laugenpumpe 19 statt. Hierzu wird die Laugenpumpe 19 vor dem eigentlichen Betriebsstartsignal SB mit einem Entlüftungssignal SE angesteuert, das den e Entlüftungsbetriebsmodus startet. Beim Entlüftungsbetriebsmodus werden zwei Phasen des dreiphasigen Gleichstrommotors 43 stromführend geschaltet, wodurch sich das Pumpenrad 37 ruckartig um 270° dreht. Die ruckartige Drehbewegung I ist in der
Der Entlüftungsbetriebsmodus weist hier beispielhaft drei aufeinander folgende ruckartige Drehbewegungen I des Pumpenrades 37 auf, die jeweils nur Sekundenbruchteile von etwa 0,3 s voneinander getrennt sind. Durch jede dieser ruckartigen Drehbewegungen I baut sich aus der ruhenden Restflüssigkeitssäule h ansatzweise eine radial um die Drehachse des Pumpenrades 37 laufende Ringströmung auf, wie sie in der
Erst nach Ablauf des Entlüftungsbetriebsmodus wird der Gleichstrommotor 43 mit dem Betriebsstartsignal SB angesteuert. In Abgrenzung zur ruckartigen Drehbewegung I des Pumpenrades 37 beim Entlüftungsvorgang wird beim nachfolgenden Betriebsstart die Drehzahl des Pumpenrades 37 nicht schlagartig, sondern kontinuierlich bis zum Erreichen der maximalen Fördermenge hochgefahren.Only after expiration of the bleeding mode of operation, the
- 11
- Spülbehälterrinse tank
- 3, 53, 5
- Geschirrkörbebaskets
- 7, 97, 9
- Sprüharmespray arms
- 1111
- Pumpentopfsump
- 1313
- Umwälzpumpecirculating pump
- 15, 1615, 16
- Flüssigkeitsleitungenfluid lines
- 1717
- FrischwasserzuleitungFresh water supply
- 1919
- LaugenpumpeDrain pump
- 2121
- Feinfilterfine filter
- 2222
- Grobfiltercoarse filter
- 2323
- Steuereinrichtungcontrol device
- 2727
- Rückschlagventilcheck valve
- 2929
- SiphonabschnittSiphonabschnitt
- 3131
- Ansaugstutzenintake
- 3333
- Pumpendeckelpump cover
- 3535
- Pumpenkammerpump chamber
- 3737
- Pumpenradimpeller
- 3939
- Druckstutzenpressure port
- 4343
- GleichstrommotorDC motor
- 4545
- Rotor-DauermagnetRotor permanent magnet
- 4646
- Rotorwellerotor shaft
- 4747
- Statorpaketestator packs
- hH
- RestflüssigkeitssäuleResidual liquid column
- ll
- ruckartige Drehbewegungjerky rotation
- SE S E
- Entlüftungssignalventing signal
- SB S B
- BetriebsstartsignalOperation start signal
Claims (36)
- Water-conducting household appliance, particularly a dishwasher, at least comprising a pump (19) by means of which fluid can be pumped in a pumping direction in at least one normal operating mode, characterised in that the pump (19) does not have a ventilation opening and can be vented by a venting operating mode which can be carried out before the normal operating mode, during which a gas bubble can be pumped against the pumping direction of the pump during its normal operating mode at least partially out of a pump chamber (35) of the pump (19) to a fluid pump inlet (31) of the pump (19).
- Water-conducting household appliance according to claim 1, characterised in that during the venting operating mode an annular flow can be produced by the pump (19), which annular flow at least partially displaces the gas bubble in the pump (19).
- Water-conducting household appliance according to claim 1 or 2, characterised in that the rotational direction of the pump (19) is the same during the normal operating mode and the venting operating mode.
- Water-conducting household appliance according to one of the preceding claims, characterised in that the pump (19) may be operated during the venting operating mode with a different rotational speed characteristic than during the normal operating mode.
- Water-conducting household appliance according to claim 4, characterised in that the rotational speed characteristic during the venting operating mode has a greater rotational speed fluctuation range than during the normal operating mode.
- Water-conducting household appliance according to claim 4 or 5, characterised in that the rotational speed characteristic during the venting operating mode has larger alterations to the rotational speed per unit of time than during the normal operating mode.
- Water-conducting household appliance according to one of the preceding claims, characterised in that the pump (19) may be operated discontinuously during the venting operating mode.
- Water-conducting household appliance according to one of the preceding claims 1 to 7, characterised in that the pump (19) has a lower delivery rate during the venting operating mode than during the normal operating mode of the pump (19).
- Water-conducting household appliance according to one of the preceding claims 1 to 8, characterised in that the pump (19) is configured as a discharge pump and its fluid pump inlet (31) is connected to a sump (11).
- Water-conducting household appliance according to one of the preceding claims 1 to 9, characterised in that the pump (19) is operated such that a pump impeller (37) of the pump (19) carries out at least one intermittent rotational movement (1) at least occasionally during the venting operating mode.
- Water-conducting household appliance according to claim 10, characterised in that the pump (19) is operated such that the pump impeller (37) during the intermittent rotational movement (1) rotates by a rotational angle which is less than 360°.
- Water-conducting household appliance according to claim 10 or 11, characterised in that the pump (19) is operated such that during the venting operating mode the pump impeller (37) performs a sequence of, in particular, three to five intermittent rotational movements (1).
- Water-conducting household appliance according to one of the preceding claims 10 to 12, characterised in that the pump (19) is operated such that the intermittent rotational movement (1) of the pump impeller (37) may be repeated at time intervals spaced apart from one another.
- Water-conducting household appliance according to one of claims 1 to 13, characterised in that during the venting operating mode a non-return valve element (27) on the pressure side is closed.
- Water-conducting household appliance according to one of the preceding claims 1 to 14, characterised in that for driving the pump (19) a DC motor (43) is provided, in particular a brushless DC motor with electronic commutation.
- Water-conducting household appliance according to claim 15, characterised in that when using a two-phase or three-phase DC motor (43) for producing the intermittent rotational movement (1) of the pump impeller (37) only one phase, or two phases in the case of a three-phase DC motor, is/are switched to conduct current.
- Water-conducting household appliance according to one of the preceding claims 10 to 16, characterised in that the intermittent rotational movements (1) of the pump impeller (37) are chronologically spaced apart from one another by a predetermined time period, in particular by a time period of substantially 0.1 s to 0.5 s, preferably from 0.2 s to 0.4 s.
- Water-conducting household appliance according to one of the preceding claims 10 to 17, characterised in that the intermittent movement (1) of the pump impeller (37) extends over a time period substantially of 0.05 s to 0.5 s, preferably from 0.1 s to 0.2 s.
- Method for operating a water-conducting household appliance, particularly a dishwasher, having at least one pump (19), wherein fluid is pumped by the pump (19) in a pumping direction in at least one normal operating mode, characterised in that the pump, which does not have a ventilation opening, is vented by a venting operating mode which can be carried out before its normal operating mode, during which a gas bubble is pumped against the pumping direction of the pump during its normal operating mode at least partially out of a pump chamber (35) of the pump (19) to a fluid pump inlet (31) of the pump (19).
- Method according to claim 19, characterised in that during the venting operating mode the gas bubble is at least partially displaced by an annular flow in the pump (19), which is produced by the pump (19).
- Method according to claim 19 or 20, characterised in that the pump (19) is operated in the same rotational direction during its normal operating mode and its venting operating mode.
- Method according to one of the preceding claims 19 to 21, characterised in that the pump (19) is operated during its venting operating mode with a different rotational speed characteristic than during its normal operating mode.
- Method according to claim 22, characterised in that the rotational speed characteristic during the venting operating mode has a greater rotational speed fluctuation range than during the normal operating mode.
- Method according to claim 22 or 23, characterised in that the rotational speed characteristic during the venting operating mode has larger alterations to the rotational speed per unit of time than during the normal operating mode.
- Method according to one of the preceding claims 19 to 24, characterised in that the pump (19) is operated discontinuously during its venting operating mode.
- Method according to one of the preceding claims 19 to 25, characterised in that the pump (19) pumps a smaller quantity of fluid during the venting operating mode than during the normal operating mode of the pump (19).
- Method according to one of the preceding claims 19 to 26, characterised in that the pump (19) is used as a discharge pump, the fluid pump inlet (31) being connected to a sump (11).
- Method according to one of the preceding claims 19 to 27, characterised in that at least one intermittent rotational movement (1) is carried out by the pump impeller (37) of the pump (19) at least occasionally during the venting operating mode.
- Method according to claim 28, characterised in that the pump impeller (37) during the intermittent rotational movement (1) is rotated by a rotational angle which is less than 360°, in particular less than 240° or 120°.
- Method according to claim 28 or 29, characterised in that during the venting operating mode a sequence of, in particular, three to five intermittent rotational movements (1) is performed by the pump impeller (37).
- Method according to one of the preceding claims 28 to 30, characterised in that the intermittent rotational movement (1) of the pump impeller (37) is repeated at time intervals spaced apart from one another.
- Method according to at least one of the preceding claims 19 to 31, characterised in that during the venting operating mode a non-return valve element (27) on the pressure side is kept closed.
- Method according to at least one of the preceding claims 19 to 32, characterised in that for driving the pump (19) a DC motor (43) is used, in particular a brushless DC motor with electronic commutation.
- Method according to claim 33, characterised in that when using a two-phase or three-phase DC motor (43) for producing the intermittent rotational movement (1) of the pump impeller (37) only one phase, or two phases in the case of a three-phase DC motor, is/are switched to conduct current.
- Method according to one of the preceding claims 28 to 34, characterised in that the intermittent rotational movements (1) of the pump impeller (37) are chronologically spaced apart from one another by a predetermined time period, in particular by a time period of substantially 0.1 s to 0.5 s, preferably from 0.2 s to 0.4 s.
- Method according to one of the preceding claims 28 to 35, characterised in that the intermittent movement (1) of the pump impeller (37) extends over a time period substantially of 0.05 s to 0.5 s, preferably from 0.1 s to 0.2 s.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10709497T PL2416694T3 (en) | 2009-04-06 | 2010-03-16 | Water-conducting household appliance, particularly a dishwasher |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009002224A DE102009002224B4 (en) | 2009-04-06 | 2009-04-06 | Water-conducting household appliance, in particular dishwasher |
PCT/EP2010/053374 WO2010115685A1 (en) | 2009-04-06 | 2010-03-16 | Water-conducting household appliance, particularly a dishwasher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2416694A1 EP2416694A1 (en) | 2012-02-15 |
EP2416694B1 true EP2416694B1 (en) | 2015-03-04 |
Family
ID=42289157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10709497.1A Active EP2416694B1 (en) | 2009-04-06 | 2010-03-16 | Water-conducting household appliance, particularly a dishwasher |
Country Status (5)
Country | Link |
---|---|
US (1) | US8734136B2 (en) |
EP (1) | EP2416694B1 (en) |
DE (1) | DE102009002224B4 (en) |
PL (1) | PL2416694T3 (en) |
WO (1) | WO2010115685A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011087168A1 (en) * | 2011-11-28 | 2013-05-29 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance and control method for a household appliance |
DE102014202570A1 (en) * | 2014-02-12 | 2015-08-13 | BSH Hausgeräte GmbH | Electric drive motor, pump and household appliance with such a pump |
DE102016201446B3 (en) * | 2016-02-01 | 2017-02-09 | BSH Hausgeräte GmbH | Laundry care device with a pump control |
CN111513642B (en) * | 2020-04-23 | 2023-06-27 | 东莞优乐家智能家电有限公司 | High-temperature disinfection dish washer and dish washing method thereof |
JP2023003768A (en) * | 2021-06-24 | 2023-01-17 | 株式会社ミクニ | oil pump device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4106060C2 (en) * | 1991-02-27 | 1995-11-30 | Fresenius Ag | Pump, in particular an encapsulated medical pump |
DE4341215A1 (en) | 1993-12-03 | 1995-06-08 | Miele & Cie | Combined centrifugal pump and axial air compressor for washing machine etc |
DE9406463U1 (en) * | 1994-04-19 | 1994-06-16 | Bosch-Siemens Hausgeräte GmbH, 81669 München | Venting device for non-self-priming drain pumps in dishwashers |
DE9415480U1 (en) | 1994-09-24 | 1996-02-01 | AEG Hausgeräte GmbH, 90429 Nürnberg | Venting device for liquid-carrying hollow components |
US20060237035A1 (en) * | 2005-04-25 | 2006-10-26 | Viking Range Corporation | Dishwasher with food particle disposal system |
DE102007030065A1 (en) | 2007-06-29 | 2009-01-02 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher with a pump with a brushless DC motor |
-
2009
- 2009-04-06 DE DE102009002224A patent/DE102009002224B4/en not_active Expired - Fee Related
-
2010
- 2010-03-16 PL PL10709497T patent/PL2416694T3/en unknown
- 2010-03-16 EP EP10709497.1A patent/EP2416694B1/en active Active
- 2010-03-16 WO PCT/EP2010/053374 patent/WO2010115685A1/en active Application Filing
- 2010-03-16 US US13/256,953 patent/US8734136B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2416694A1 (en) | 2012-02-15 |
US8734136B2 (en) | 2014-05-27 |
WO2010115685A1 (en) | 2010-10-14 |
PL2416694T3 (en) | 2015-08-31 |
DE102009002224B4 (en) | 2012-09-06 |
US20120009074A1 (en) | 2012-01-12 |
DE102009002224A1 (en) | 2010-10-07 |
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