EP1219228A1 - Control method for controlling the electrical drive motor of a pump to different rotational speeds - Google Patents

Control method for controlling the electrical drive motor of a pump to different rotational speeds Download PDF

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Publication number
EP1219228A1
EP1219228A1 EP01127262A EP01127262A EP1219228A1 EP 1219228 A1 EP1219228 A1 EP 1219228A1 EP 01127262 A EP01127262 A EP 01127262A EP 01127262 A EP01127262 A EP 01127262A EP 1219228 A1 EP1219228 A1 EP 1219228A1
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EP
European Patent Office
Prior art keywords
drive motor
speed
pump
control method
dishwasher
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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
EP01127262A
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German (de)
French (fr)
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EP1219228B1 (en
Inventor
Bernd Schessl
Michael Rosenbauer
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1219228A1 publication Critical patent/EP1219228A1/en
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Publication of EP1219228B1 publication Critical patent/EP1219228B1/en
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    • 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
    • A47L15/4289—Spray-pressure measuring or regulating arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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

Definitions

  • the invention relates to a control method for controlling the electric drive motor a pump, in particular the circulation pump of a dishwasher, to various Speeds.
  • the invention has for its object a control method of the one described Art to improve so that the speed of the drive motor of a pump automatically is controlled so that a desired for performing an operation Delivery pressure of the pump is reached.
  • the object is achieved according to the invention in that the drive motor periodically back and forth between an upper and a lower speed is, before the respective up control from the lower to the upper speed the drive motor is briefly switched off. Because of such control result in pressure pulses for the medium conveyed by the pump, the the pressure inherent in the pressure impulses is substantially higher than the pressure at more uniform Advancement. By briefly switching off the drive motor, enough can be done Collect liquid so that when the drive motor is subsequently started up to the upper speed because of the sufficiently available Amount of liquid also the maximum possible pressure is reached.
  • High pressure pulses can be generated with a relatively low expenditure of energy that the drive motor immediately after reaching the upper speed controlled back lower speed and operated at the lower speed for a certain time becomes. Since the upper speed only occurs for a very short time, this is also the case required drive power correspondingly low.
  • the drive motor of their circulation pump by means of the control method according to at least one of the claims 1-3 is controlled.
  • a pulsating spray can be generated due to its periodically increased jet pressure, a significantly better cleaning result is achieved.
  • higher jet pressure also very stubborn dirt residues detached from the dishes to be cleaned. While The loosened dirt can be removed in the time following the increased jet pressure transported away by the flushing liquid then sprayed on at a lower pressure become.
  • the circulation pump can be opened when starting up the upper or maximum speed is a maximum pressure for spraying the washing liquid achieve with certainty that the time for the brief shutdown of the Drive motor depending on the time for the re-accumulation of a certain one Amount of liquid in the lower area (pump bowl) of the dishwasher rinse tank is measured. This ensures that when starting up the circulation pump has sufficient liquid and no air is sucked in is, which would result in a reduction in the delivery pressure.
  • Such periodic control can be particularly advantageous for the circulation pump use in a dishwasher.
  • a high spray jet pressure is applied to an upper or its maximum permissible speed 1 achieved, which also causes a detachment of very firmly adhering dirt parts, so that ultimately the cleaning result of a dishwasher is significantly improved.
  • Starting up the drive motor to the upper or the maximum permissible speed 1 can be achieved with relatively little effort. The same applies to periodic switching between the two speeds 1 and 2 and the short-term shutdown 4 of the drive motor.
  • flushing liquid can get in accumulate in the lower area of the dishwasher's washing container so that Sufficient rinsing liquid when the circulation pump is started up again is available in order to reduce the delivery pressure Avoid sucking in air with certainty.

Abstract

The method involves controlling the drive motor periodically between an upper (1) and a lower (2) revolution rate. The drive motor is temporarily switched off (4) before increasing the revolution rate from the lower to the upper rate. The motor is immediately driven back to the lower revolution rate after reaching the upper rate and operated at the lower rate for a defined period (3). <??>AN Independent claim is also included for the following: a dishwasher in which the drive motor is controlled in accordance with the inventive method.

Description

Die Erfindung betrifft ein Steuerverfahren zum Steuern des elektrischen Antriebsmotors einer Pumpe, insbesondere der Umwälzpumpe einer Geschirrspülmaschine, auf verschiedene Drehzahlen.The invention relates to a control method for controlling the electric drive motor a pump, in particular the circulation pump of a dishwasher, to various Speeds.

Aus der DE-A-199 07 158 ist es bekannt, für die Umwälzpumpe einer Geschirrspülmaschine mittels Tastenschalter in Abhängigkeit von der Art und dem Verschmutzungsgrad des zu spülenden Geschirrs unterschiedliche Drehzahlen einzustellen. Hierdurch wird ein unterschiedlicher Druck für den auf das zu reinigende Geschirr gerichteten Sprühstrahl erreicht. Dies trägt zu einer Verbesserung des Reinigungsergebnisses bei. Nachteilig ist, dass der jeweils günstigste Druck für den Sprühstrahl immer von Hand eingestellt werden muss.From DE-A-199 07 158 it is known for the circulation pump of a dishwasher by means of a button switch depending on the type and degree of soiling set different speeds for the dishes to be washed. This will be a different pressure for the spray directed at the dishes to be cleaned reached. This contributes to an improvement in the cleaning result. The disadvantage is that the most favorable pressure for the spray jet is always set by hand got to.

Der Erfindung liegt die Aufgabe zugrunde, ein Steuerverfahren der eingangs beschriebenen Art so zu verbessern, dass die Drehzahl des Antriebsmotors einer Pumpe selbsttätig so gesteuert wird, dass ein für die Durchführung eines Arbeitsvorganges gewünschter Förderdruck der Pumpe erreicht wird.The invention has for its object a control method of the one described Art to improve so that the speed of the drive motor of a pump automatically is controlled so that a desired for performing an operation Delivery pressure of the pump is reached.

Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, dass der Antriebsmotor periodisch zwischen einer oberen und einer unteren Drehzahl hin- und hergesteuert wird, wobei vor dem jeweiligen Hochsteuern von der unteren zur oberen Drehzahl eine kurzzeitige Abschaltung des Antriebsmotors erfolgt. Auf Grund einer solchen Steuerung ergeben sich für das von der Pumpe geförderte Medium Druckimpulse, wobei der den Druckimpulsen innewohnende Druck wesentlich höher ist als der Druck bei gleichmäßiger Förderung. Durch das kurzzeitige Abschalten des Antriebsmotors kann sich genügend Flüssigkeit ansammeln, so dass beim darauffolgenden Hochfahren des Antriebsmotors auf die obere Drehzahl wegen der ausreichend zur Verfügung stehenden Flüssigkeitsmenge auch der maximal mögliche Druck erreicht wird.The object is achieved according to the invention in that the drive motor periodically back and forth between an upper and a lower speed is, before the respective up control from the lower to the upper speed the drive motor is briefly switched off. Because of such control result in pressure pulses for the medium conveyed by the pump, the the pressure inherent in the pressure impulses is substantially higher than the pressure at more uniform Advancement. By briefly switching off the drive motor, enough can be done Collect liquid so that when the drive motor is subsequently started up to the upper speed because of the sufficiently available Amount of liquid also the maximum possible pressure is reached.

Hohe Druckimpulse lassen sich mit einem relativ geringen Energieaufwand dadurch erzeugen, dass der Antriebsmotor unmittelbar nach Erreichen der oberen Drehzahl auf die untere Drehzahl zurückgesteuert und für eine gewisse Zeit mit der unteren Drehzahl betrieben wird. Da die obere Drehzahl nur für eine sehr kurze Zeit auftritt, ist auch die hierfür erforderliche Antriebsleistung entsprechend gering.High pressure pulses can be generated with a relatively low expenditure of energy that the drive motor immediately after reaching the upper speed controlled back lower speed and operated at the lower speed for a certain time becomes. Since the upper speed only occurs for a very short time, this is also the case required drive power correspondingly low.

Vorteilhaft ist es, wenn die obere Drehzahl der für den Antriebsmotor maximal zulässigen Drehzahl entspricht. Dadurch wird auch für die Druckimpulse ein maximaler Druck erzielt. Ein kurzzeitiger Betrieb des Antriebsmotors mit seiner maximalen Drehzahl ist in der Regel ohne weiteres möglich. Damit kann gegenüber dem bei Nennbetrieb des Antriebsmotors erzielbaren Druck ein Druckimpuls mit wesentlich höherem Druck erreicht werden.It is advantageous if the upper speed of the maximum permissible for the drive motor Speed corresponds. As a result, a maximum pressure is also achieved for the pressure pulses. A short-term operation of the drive motor with its maximum speed is usually easily possible. This can be compared to the nominal operation of the drive motor achievable pressure a pressure pulse can be achieved with much higher pressure.

Bei einer Geschirrspülmaschine ist es von besonderem Vorteil, dass der Antriebsmotor von deren Umwälzpumpe mittels des Steuerverfahrens nach mindestens einem der Ansprüche 1-3 gesteuert ist. Auf diese Weise lässt sich ein pulsierender Sprühstrahl erzeugen, durch dessen periodisch erhöhten Strahldruck ein deutlich besseres Reinigungsergebnis erzielt wird. Infolge des kurzzeitig auftretenden höheren Strahldruckes werden auch sehr festhaftende Schmutzreste von dem zu reinigenden Geschirr abgelöst. Während der nach dem erhöhten Strahldruck folgenden Zeit können die gelösten Schmutzreste durch die dann mit niedrigerem Druck aufgesprühte Spülflüssigkeit abtransportiert werden.In a dishwasher, it is particularly advantageous that the drive motor of their circulation pump by means of the control method according to at least one of the claims 1-3 is controlled. In this way, a pulsating spray can be generated due to its periodically increased jet pressure, a significantly better cleaning result is achieved. As a result of the briefly occurring higher jet pressure also very stubborn dirt residues detached from the dishes to be cleaned. While The loosened dirt can be removed in the time following the increased jet pressure transported away by the flushing liquid then sprayed on at a lower pressure become.

Bei einer Geschirrspülmaschine lässt sich beim Hochfahren von deren Umwälzpumpe auf die obere bzw. maximale Drehzahl ein maximaler Druck für das Versprühen der Spülflüssigkeit mit Sicherheit dadurch erreichen, dass die Zeit für die kurzzeitige Abschaltung des Antriebsmotors in Abhängigkeit von der Zeit für das Wiederansammeln einer bestimmten Flüssigkeitsmenge in dem unteren Bereich (Pumpentopf) des Spülbehälters der Geschirrspülmaschine bemessen ist. Hierdurch wird sichergestellt, dass beim Hochfahren der Umwälzpumpe ausreichend Flüssigkeit zur Verfügung steht und keine Luft mitangesaugt wird, wodurch sich eine Verminderung des Förderdruckes ergeben würde.With a dishwasher, the circulation pump can be opened when starting up the upper or maximum speed is a maximum pressure for spraying the washing liquid achieve with certainty that the time for the brief shutdown of the Drive motor depending on the time for the re-accumulation of a certain one Amount of liquid in the lower area (pump bowl) of the dishwasher rinse tank is measured. This ensures that when starting up the circulation pump has sufficient liquid and no air is sucked in is, which would result in a reduction in the delivery pressure.

In der Zeichnung ist beispielhaft ein Drehzahldiagramm für einen nach dem erfindungsgemäßen Steuerverfahren gesteuerten Antriebsmotor einer Pumpe dargestellt.In the drawing is an example of a speed diagram for a according to the invention Control method controlled drive motor of a pump shown.

Nach dem Anlauf eines eine Pumpe antreibenden Antriebsmotor wird dieser auf eine obere Drehzahl 1 hochgesteuert. Diese obere Drehzahl kann der für den Antriebsmotor und die von ihm angetriebene Pumpe zulässigen maximalen Drehzahl entsprechen. Unmittelbar nach Erreichen dieser oberen bzw. maximalen Drehzahl wird der Antriebsmotor auf eine niedrigere Drehzahl 2 zurückgesteuert und läuft dann für eine bestimmte Zeitspanne 3 mit dieser niedrigeren Drehzahl 2. Danach wird der Antriebsmotor kurzzeitig abgeschaltet, bevor er wieder auf die obere bzw. maximale Drehzahl 1 hochgesteuert und unmittelbar nach deren Erreichen wieder auf die niedrigere Drehzahl 2 zurückgefahren wird. Der Wechsel zwischen den beiden Drehzahlen 1 und 2 und der Abschaltung 4 erfolgt periodisch. Die entsprechende Steuerung kann mittels eines Zeitgliedes durchgeführt werden.After the start of a drive motor driving a pump, it is switched to an upper one Speed 1 high controlled. This upper speed can be that for the drive motor and the maximum speed allowed by the pump he drives correspond. Right away after reaching this upper or maximum speed, the drive motor is opened a lower speed 2 is controlled and then runs for a certain period of time 3 with this lower speed 2. Then the drive motor is briefly switched off, before it is again steered up to the upper or maximum speed 1 and immediately after they have been reached the speed 2 is reduced again. The change between the two speeds 1 and 2 and the shutdown 4 takes place periodically. The corresponding control can be carried out by means of a timer become.

Eine derartige periodische Steuerung lässt sich mit besonderem Vorteil für die Umwälzpumpe einer Geschirrspülmaschine anwenden. Durch das Hochfahren der Umwälzpumpe auf eine obere bzw. ihre maximal zulässige Drehzahl 1 wird ein hoher Sprühstrahldruck erreicht, der auch ein Ablösen von sehr festhaftenden Schmutzteilen bewirkt, so dass letztlich das Reinigungsergebnis einer Geschirrspülmaschine wesentlich verbessert wird. Das Hochfahren des Antriebsmotors auf die obere bzw. die maximal zulässige Drehzahl 1 ist mit relativ geringem Aufwand zu erreichen. Desgleichen das periodische Umschalten zwischen den beiden Drehzahlen 1 und 2 und der kurzzeitigen Abschaltung 4 des Antriebsmotors.Such periodic control can be particularly advantageous for the circulation pump use in a dishwasher. By starting up the circulation pump a high spray jet pressure is applied to an upper or its maximum permissible speed 1 achieved, which also causes a detachment of very firmly adhering dirt parts, so that ultimately the cleaning result of a dishwasher is significantly improved. Starting up the drive motor to the upper or the maximum permissible speed 1 can be achieved with relatively little effort. The same applies to periodic switching between the two speeds 1 and 2 and the short-term shutdown 4 of the drive motor.

Während der kurzzeitigen Abschaltung 4 des Antriebsmotors kann sich Spülflüssigkeit in dem unteren Bereich des Spülbehälters der Geschirrspülmaschine ansammeln, so dass bei dem nachfolgenden erneuten Hochfahren der Umwälzpumpe ausreichend Spülflüssigkeit zur Verfügung steht, um so ein zu einer Verminderung des Förderdruckes führendes Ansaugen von Luft mit Sicherheit zu vermeiden.During the brief shutdown 4 of the drive motor, flushing liquid can get in accumulate in the lower area of the dishwasher's washing container so that Sufficient rinsing liquid when the circulation pump is started up again is available in order to reduce the delivery pressure Avoid sucking in air with certainty.

Claims (5)

Steuerverfahren zum Steuern des elektrischen Antriebsmotors einer Pumpe, insbesondere der Umwälzpumpe einer Geschirrspülmaschine, auf verschiedene Drehzahlen,
dadurch gekennzeichnet, dass der Antriebsmotor periodisch zwischen einer oberen und einer unteren Drehzahl (1 bzw. 2) hin- und hergesteuert wird, wobei vor dem jeweiligen Hochsteuern von der unteren zur oberen Drehzahl (2 bzw. 1) eine kurzzeitige Abschaltung (4) des Antriebsmotors erfolgt.Control method for controlling the electric drive motor of a pump, in particular the circulation pump of a dishwasher, to different speeds,
characterized in that the drive motor is periodically controlled to and fro between an upper and a lower speed (1 or 2), with a brief shutdown (4) of the Drive motor takes place. Steuerverfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Antriebsmotor unmittelbar nach Erreichen der oberen Drehzahl (1) auf die untere Drehzahl (2) zurückgesteuert und für eine gewisse Zeitspanne (3) mit der unteren Drehzahl (2) betrieben wird.Control method according to claim 1, characterized in that the drive motor is controlled back to the lower speed (2) immediately after reaching the upper speed (1) and is operated at the lower speed (2) for a certain period of time (3). Steuerverfahren nach Anspruch 2, dadurch gekennzeichnet, dass die obere Drehzahl (1) der für den Antriebsmotor maximal zulässigen Drehzahl entspricht.Control method according to claim 2, characterized in that the upper speed (1) corresponds to the maximum permissible speed for the drive motor. Geschirrspülmaschine, dadurch gekennzeichnet, dass der Antriebsmotor von deren Umwälzpumpe mittels des Steuerverfahrens nach mindestens einem der Ansprüche 1-3 gesteuert ist.Dishwasher, characterized in that the drive motor is controlled by its circulation pump by means of the control method according to at least one of claims 1-3. Geschirrspülmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Zeit für die kurzzeitige Abschaltung (4) des Antriebsmotors in Abhängigkeit von der Zeit für das Wiederansammeln einer bestimmten Flüssigkeitsmenge in dem unteren Bereich (Pumpentopf) des Spülbehälters der Geschirrspülmaschine bemessen ist.Dishwasher according to claim 4, characterized in that the time for the brief shutdown (4) of the drive motor is dimensioned as a function of the time for the recovery of a certain amount of liquid in the lower region (pump pot) of the washing container of the dishwasher.
EP01127262A 2000-12-29 2001-11-16 Control method for controlling the electrical drive motor of a pump to different rotational speeds Expired - Lifetime EP1219228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10065639 2000-12-29
DE10065639A DE10065639A1 (en) 2000-12-29 2000-12-29 Control method for controlling the electric drive motor of a pump at different speeds

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EP1219228A1 true EP1219228A1 (en) 2002-07-03
EP1219228B1 EP1219228B1 (en) 2007-04-11

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AT (1) ATE359021T1 (en)
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ES (1) ES2283369T3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1967121A1 (en) * 2007-03-06 2008-09-10 Miele &amp; Cie. KG Method for causing water to flow into the detergent holder of a dishwasher
US20110232702A1 (en) * 2008-12-19 2011-09-29 BSH Bosch und Siemens Hausgeräte GmbH Method for pumping a fluid out of an aquiferous household device
EP1669017B2 (en) † 2004-12-11 2011-11-30 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
EP2798993A3 (en) * 2013-04-29 2015-01-14 Miele & Cie. KG Device for performing a flushing programme
EP2878250A1 (en) * 2013-11-29 2015-06-03 Electrolux Appliances Aktiebolag Method of operating a water-circulating household appliance
EP1699339B2 (en) † 2003-12-22 2017-05-31 BSH Hausgeräte GmbH Dishwasher control for dealing with large amounts of food residues by variable wash programs

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9186034B2 (en) 2012-09-05 2015-11-17 Whirlpool Corporation Methods of reusing liquid in a dishwasher
US8968483B2 (en) 2012-09-10 2015-03-03 Whirlpool Corporation Method of using liquid in a dishwasher
DE102017103118A1 (en) 2016-03-07 2017-09-07 Miele & Cie. Kg Dishwasher and method for operating a dishwasher

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EP0829220A2 (en) * 1996-09-12 1998-03-18 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Method for controlling the amount of water filled in a dishwashing machine
JPH10323318A (en) * 1997-05-26 1998-12-08 Toshiba Corp Dish washing machine
EP0998872A1 (en) * 1998-11-02 2000-05-10 Electrolux Zanussi S.p.A. Working programme for dishwashing machines
EP1029498A2 (en) * 1999-02-19 2000-08-23 BSH Bosch und Siemens Hausgeräte GmbH Household dishwasher
DE19907158A1 (en) * 1999-02-19 2000-08-24 Bsh Bosch Siemens Hausgeraete Domestic dishwasher has circulation pump whose revolution rate is continuously regulated and is set to different values in different dishwasher programme sections

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EP0829220A2 (en) * 1996-09-12 1998-03-18 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Method for controlling the amount of water filled in a dishwashing machine
JPH10323318A (en) * 1997-05-26 1998-12-08 Toshiba Corp Dish washing machine
EP0998872A1 (en) * 1998-11-02 2000-05-10 Electrolux Zanussi S.p.A. Working programme for dishwashing machines
EP1029498A2 (en) * 1999-02-19 2000-08-23 BSH Bosch und Siemens Hausgeräte GmbH Household dishwasher
DE19907158A1 (en) * 1999-02-19 2000-08-24 Bsh Bosch Siemens Hausgeraete Domestic dishwasher has circulation pump whose revolution rate is continuously regulated and is set to different values in different dishwasher programme sections

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PATENT ABSTRACTS OF JAPAN vol. 1999, no. 03 31 March 1999 (1999-03-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 06 31 March 1999 (1999-03-31) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1699339B2 (en) † 2003-12-22 2017-05-31 BSH Hausgeräte GmbH Dishwasher control for dealing with large amounts of food residues by variable wash programs
EP1669017B2 (en) † 2004-12-11 2011-11-30 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
EP1967121A1 (en) * 2007-03-06 2008-09-10 Miele &amp; Cie. KG Method for causing water to flow into the detergent holder of a dishwasher
US20110232702A1 (en) * 2008-12-19 2011-09-29 BSH Bosch und Siemens Hausgeräte GmbH Method for pumping a fluid out of an aquiferous household device
US9609996B2 (en) * 2008-12-19 2017-04-04 BSH Hausgeräte GmbH Method for pumping a fluid out of an aquiferous household device
EP2798993A3 (en) * 2013-04-29 2015-01-14 Miele & Cie. KG Device for performing a flushing programme
EP2878250A1 (en) * 2013-11-29 2015-06-03 Electrolux Appliances Aktiebolag Method of operating a water-circulating household appliance

Also Published As

Publication number Publication date
DE10065639A1 (en) 2002-07-04
DE50112324D1 (en) 2007-05-24
ES2283369T3 (en) 2007-11-01
EP1219228B1 (en) 2007-04-11
ATE359021T1 (en) 2007-05-15

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