EP2933365B1 - Procédé de réglage d'un système de pompes à recirculation - Google Patents

Procédé de réglage d'un système de pompes à recirculation Download PDF

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Publication number
EP2933365B1
EP2933365B1 EP15162579.5A EP15162579A EP2933365B1 EP 2933365 B1 EP2933365 B1 EP 2933365B1 EP 15162579 A EP15162579 A EP 15162579A EP 2933365 B1 EP2933365 B1 EP 2933365B1
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EP
European Patent Office
Prior art keywords
recirculation pump
slurp
volumetric flow
time
flow rate
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EP15162579.5A
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German (de)
English (en)
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EP2933365A1 (fr
Inventor
Markus Drücker
Dirk Sieding
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Miele und Cie KG
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Miele und Cie KG
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Publication of EP2933365A1 publication Critical patent/EP2933365A1/fr
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    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/42—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to filters or pumps
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/06—Recirculation of washing liquids, e.g. by pumps or diverting valves

Definitions

  • the invention relates to a method for controlling a Umwutungspumpen system with a Umflutungspumpe with measurable operating characteristics for the circulation of wash liquor with adjustable volume flow in a tub of a washing machine. Furthermore, the invention relates to a washing machine with a control device for a Umwutungspumpen system, wherein the control device is set up and designed such that it performs the inventive use of the washing machine, a method according to the invention for controlling the Umwutungspumpen system.
  • a clocked volume flow operation is performed.
  • Volume flows in the context of the present invention have the dimension volume unit per unit time.
  • the Umflutungspumpe is turned on for a defined period of time and turned off again, before the liquor level in the tub has dropped so far that air could be sucked.
  • the lye collects again, so that the pressure rises again and the pump can be switched on again.
  • a preferred mode of operation of circulating pump systems with adjustable volume flow for example, when using a variable speed Umflutungspumpe, is to operate the Umflutungspumpe alternately with two different flow rates. These are each set for defined periods.
  • the total quantity of introduced wash liquor is divided during the washing process into the bound liquor fixed in the damp laundry and the free liquor circulated in the liquor tank by the circulating pump.
  • the fill level of the free liquor must not fall below a certain minimum level if the purpose of avoiding the needling is to be avoided.
  • the level of the free liquor in the intake of Umflutungspumpe will vary. In this respect, the maximum time interval of a high volume flow, before the Schlumpfpumpen the Umflutungspumpe sets depending on external conditions that can be very different. An on average high flow rate of the free liquor is desirable because it improves the washing result. However, this entails the increased risk of unwanted snorting.
  • the EP 1 887 443 A1 describes a method for controlling a flooding pump system, in which, however, only with environmental sensors, for example, a sound analysis is performed.
  • the invention thus presents the problem to provide a method for controlling a Umwutppumpen-system, which allows for circulating the free fleet on averaged high volume flow and at the same time minimizes the occurrence of Schlumping.
  • the achievable with the present invention consist in that a high volume flow of free liquor is circulated over time, at the same time running properties of the Umwutpumpsystems are monitored to detect a possibly occurring Schlürfpumpen and initiate countermeasures to prevent the Schlumpfpumpens depending on predetermined reference values , The acoustically disturbing noise of the sneak pump is thereby minimized or avoided.
  • the operation of the bypass pump system with the mentioned operating parameters such as the at least one volumetric flow during the volumetric flow time interval can be carried out over the course of the washing process in the simplest form with only two different volumetric flows, a first and a second volumetric flow. It is preferably switched periodically back and forth between the two flow rates.
  • the further second volume flow is chosen such that a Schlürfpumpen for most laundry situations is safely avoided. That is, it flows per unit time more or at least the same amount of free fleet back into the intake of Umflutungspumpe is circulated as a free fleet by means of the second volume flow.
  • the first volume flow is higher than the amount of free liquor flowing per unit time through the laundry back into the suction of Umflutungspumpe.
  • bypass pump system is operated in a periodic change of different volume flows.
  • the measurable operating characteristics of the bypass pump system selected from the group comprising: direct pump parameters such as time course and / or amount of electric motor current driving the Umwutungspumpe, time course and / or amount of a Umwutungspumpen speed and time course and / or magnitude a received by the Umflutungspumpe electrical power and / or indirect pump parameters such as time course and / or quality of a generated by the Umwutungspumpe sound level and time course and / or quality of a vibration generated by the Umflutungspumpe.
  • direct pump parameters such as time course and / or amount of electric motor current driving the Umwutungspumpe, time course and / or amount of a Umwutungspumpen speed and time course and / or magnitude a received by the Umflutungspumpe electrical power
  • indirect pump parameters such as time course and / or quality of a generated by the Umwutungspumpe sound level and time course and / or quality of a vibration generated by the Umflutungspumpe.
  • the speed-controlled pump motor of the Umflutungspumpe is preferably a frequency converter controlled brushless permanent magnet motor used. With this motor, the direct pump parameters can be analyzed and controlled very simply electronically.
  • the control for terminating the Schlürfpumpens influenced preferably as operating parameters, the direct pump parameters such as time course and / or amount of the Umflutungspumpe driving electric motor current, time course and / or amount of Umwutungspumpen speed and time course and / or amount of electrical power absorbed by the Umflutungspumpe Power.
  • the direct pump parameters such as time course and / or amount of the Umflutungspumpe driving electric motor current, time course and / or amount of Umwutungspumpen speed and time course and / or amount of electrical power absorbed by the Umflutungspumpe Power.
  • step e) the time-averaged volume flow is reduced from a start level to a reduced level, wherein the time-averaged volume flow is subsequently increased from the reduced level by means of a plurality of increase steps with associated increase levels in the direction of the start level.
  • the operation of the bypass pump system is examined for dinghy pumps, with a subsequent increase step of the time-averaged volume flow being executed only when no dart pumping has been detected.
  • the system slowly scans upward after lowering the time-averaged volume flow.
  • this analysis period preferably extends over more than one of these periods.
  • the time-averaged volume flow is preferably reduced again to the increase level before the further increase step.
  • the increase level before the further increase step it has already been determined during the preceding analysis period that no slip pumping occurs.
  • the time-averaged volume flow is preferably lowered by one or more incremental steps that have already been carried out. If the reduction takes place by two or more incremental steps, it is advantageous to significantly extend the analysis period before the renewed increase in the volumetric flow in comparison to the previous course of increase. In this way, it is easier to determine the level of increase below the threshold for the occurrence of snore pumping.
  • the aim of the preferred embodiments of the control method is to find and dynamically maintain this maximum level of increase in a self-learning process if it changes in the course of the washing process.
  • the influencing of the time-averaged volume flow is realized particularly simply by using the at least one volume flow and / or its volume flow time interval as control variables.
  • the speed-controlled Umwutpumps this results in an electronically easy to implement embodiment.
  • the system reacts immediately after a Schlurfpumpen was detected.
  • This is preferably realized in that the Schlürfpump reference value specified and assigned in method step d) is zero is predetermined.
  • the comparison of the Schlürfpump information with the Schlürfpump reference value carried out in method step e) thus directly leads to a change in the time-averaged volumetric flow by influencing the operating parameters of the circulation-pump system.
  • the system does not react immediately after detecting a Schlurfpumpens.
  • the Schlürfpump reference value specified and assigned in method step d) is greater than zero and is compared with the amount of an electronic counter, which increases when a Schlampen pumping of the inundation pump is detected.
  • the electronic counter is continuously increased during the continuation of a detected sniffing pump or that the electronic counter is increased by one counting step during the duration of a detected sniffing pump.
  • the electronic counter is continuously increased during the continuation of a detected sniffing pump or that the electronic counter is increased by one counting step during the duration of a detected sniffing pump.
  • the invention relates to a washing machine with a tub and a Umwutungspumpen system for circulating wash liquor in the tub with different flow rates and a control device for the Umwutpumpsystem, wherein the control device is set up and designed such that this is the intended use of the washing machine of the previously described method for controlling the Umwutpumpsystems performs.
  • FIG. 1 shows the time course of an initially operated with two different volume flows V1 and V2 washing cycle of a Umwutpumpsystems.
  • FIG. 2 shows that too FIG. 1 corresponding time course of the level of free liquor in the tub of a washing machine, which is equipped with the Umwutungspumpen system.
  • the problems to be solved by the invention are based on the time profiles of the volume flow of the bypass pump system in FIG. 1 and the Laugen Stahlllstandes in the tub of a washing machine with the Umwutpump-system in FIG. 2 explained.
  • the curves shown in solid lines represent the course to be improved in the prior art.
  • a preferred mode of operation of Umflutungspumpen-systems with variable-time flow rates is to operate the Umflutungspumpe alternately, in particular periodically alternating, with two different flow rates. These are each set for defined periods.
  • the period T2 has elapsed, the volume flow is increased to the higher value V1 for a period T1. This is desirable, as already mentioned, since the increased volume flow, for example, improves the washing action and / or the distribution of base and detergent. If the time period T1 is too long, the fill level of the wash liquor initially drops below the level h3 which is in FIG.
  • the mode of operation described below leads to recognition of the sneak pumping operation and the resulting automatic setting of a mode which completely avoids or minimizes the sneaking pumping of the flushing pump system.
  • the starting point is initially the operating mode with fixed periods T1 and T2 and the associated volume flows V1 and V2.
  • the slur limit is exceeded and the Schlurfpumpen occurs. This is detected by the drive of the pump.
  • the occurrence of the Schlürfpumpen event can be counted for example by means of a counter. If the Schlurfpumpen in one of the subsequent cycles T1 and T2 on again, the counter is again increased.
  • a threshold may be defined from which to take action described in the following embodiments. However, it is also possible that this limit is set to zero, so that the measures described below are initiated immediately after a Schlumping event has been detected.
  • a first embodiment of the control method consists in that the increased volume flow V1 is lowered to a value V3 reduced by a factor x (eg 0.9). If the pump in the next cycle with the in FIG. 1 operated volume flow V3 operated, the level is reduced slower. If the reduction of the volume flow is sufficient, then the slur limit h3 is not undershot, before it is converted to the volume flow V2, at which the level rises again. This would ensure operation without snorkelling pumps. On the other hand, if the reduction to the volume flow V3 is insufficient, the Schlürfpump mode is detected and the counter is increased if the slur limit is undershot. If the limit value is exceeded again, the volume flow V3 is then reduced by a factor. This procedure ensures that the volume flow is gradually reduced until the circulation pump system can be operated without the use of scavenge pumps.
  • a factor x eg 0.9
  • the lowered level of the higher volume flow is gradually raised again. After each lift, an analysis period is waited to determine if the level in the tub is sufficient and remains, so that a Schlurfpumpen is avoided. As the level of the originally reduced higher volume flow continues to rise sooner or later, a snorkel pump will occur again. Then again a reduction of the volume flow begins. However, this reduction can be made to one of the previously traversed levels at which no scythes were detected during the analysis period. In this way, the system autonomously learns to maximize its total volume flow averaged over the two alternating periods T1 and T2 without provoking a sniffer pumping operation.
  • the operating parameter of the switch-on time T2 is extended with a low volumetric flow V2, so that the level can rise to a higher level than h1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (13)

  1. Procédé de réglage d'un système de pompes à recirculation comprenant une pompe à recirculation ayant des caractéristiques de fonctionnement mesurables pour la circulation d'une solution détergente avec un débit volumique réglable dans une cuve de lavage d'une machine à laver, les caractéristiques de fonctionnement mesurables du système de pompes à recirculation étant choisies dans le groupe comprenant : des paramètres directs de pompage tels que l'évolution dans le temps et/ou la valeur d'un courant de moteur électrique entraînant la pompe à recirculation, l'évolution dans le temps et/ou la valeur d'une vitesse de rotation de pompes à recirculation et l'évolution dans le temps et/ou la valeur d'une puissance électrique consommée par la pompe à recirculation, et le procédé présentant les étapes de procédé suivantes :
    a. le fonctionnement du système de pompes à recirculation avec des paramètres de fonctionnement tels qu'au moins un débit volumique (V1) pendant au moins un intervalle de temps de débit volumique (T1),
    b. l'analyse des propriétés de fonctionnement du système de pompes à recirculation pendant le fonctionnement du système de pompes à recirculation selon l'étape de procédé a) pour la détection d'un pompage à aspiration d'un mélange d'air et de solution détergente traversant la pompe à recirculation,
    c. le stockage d'informations de pompage à aspiration si, à l'étape b), le pompage à aspiration de la pompe à recirculation a été détecté,
    d. la comparaison d'informations de pompage à aspiration obtenues à l'étape c) à au moins une valeur de référence prédéterminée et associée au pompage à aspiration,
    e. la modification d'au moins l'un des paramètres de fonctionnement constitués du débit volumique (V1) et de l'intervalle de temps de débit volumique (T1), de sorte qu'un débit volumique moyen dans le temps mis en circulation par le système de pompes à recirculation est réduit si l'au moins une valeur de référence du pompage à aspiration a été dépassée à l'étape de procédé d), et
    l'attente pendant un temps d'attente et/ou le renouvellement des étapes de procédé b) à e), tant que, pendant le fonctionnement du système de pompes à recirculation, le pompage à aspiration de la pompe à recirculation n'est plus détecté à l'aide des propriétés de fonctionnement mesurables.
  2. Procédé selon la revendication 1, caractérisé en ce que, dans le cas de la sélection des paramètres directs de pompage, un moteur de pompe à vitesse variable est utilisé comme moteur électrique pour la pompe à recirculation.
  3. Procédé selon la revendication 2, caractérisé en ce que le moteur de pompe à vitesse variable est conçu comme un moteur à aimant permanent sans balai commandé par un convertisseur de fréquence.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que, pour modifier les paramètres de fonctionnement mentionnés à l'étape de procédé e), les paramètres directs de pompage tels que l'évolution dans le temps et/ou la valeur d'un courant de moteur électrique entraînant la pompe à recirculation, l'évolution dans le temps et/ou la valeur d'une vitesse de rotation de pompes à recirculation et l'évolution dans le temps et/ou la valeur d'une puissance électrique consommée par la pompe à recirculation.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que, à l'étape de procédé e), le débit volumique moyen dans le temps est réduit d'un niveau de départ à un niveau réduit, le débit volumique moyen dans le temps étant ensuite accru de ce niveau réduit en direction du niveau de départ au moyen d'une pluralité de pas d'augmentation avec des niveaux d'augmentation associés.
  6. Procédé selon la revendication 5, caractérisé en ce que, après chaque pas d'augmentation pendant une période d'analyse, le fonctionnement du système de pompes à recirculation est examiné en termes de pompage à aspiration, une nouvelle étape d'augmentation du débit volumique moyen dans le temps n'étant réalisée que lorsqu'aucun pompage à aspiration n'a été détecté.
  7. Procédé selon la revendication 6, caractérisé en ce que, dans le cas où le pompage à aspiration est détecté après une nouvelle étape d'augmentation, le débit volumique moyen dans le temps est de nouveau réduit au niveau d'augmentation avant l'étape supplémentaire d'augmentation.
  8. Procédé selon la revendication 7, caractérisé en ce que, lors d'une reprise du pompage à aspiration, le débit volumique moyen dans le temps est réduit d'un ou de plusieurs pas d'augmentation déjà franchis.
  9. Procédé selon l'une des revendications 4 à 8, caractérisé en ce que l'au moins un débit volumique (V1) et/ou son intervalle de temps de débit volumique (T1) sont utilisés comme variables de réglage du débit volumique moyen dans le temps.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que la valeur de référence prédéterminée et associée au pompage à aspiration à l'étape de procédé d) est prédéterminée à zéro.
  11. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que la valeur de référence prédéterminée et associée au pompage à aspiration à l'étape de procédé d) est supérieure à zéro et est comparée à la valeur d'un compteur électronique, lequel augmente lorsqu'un pompage à aspiration de la pompe à recirculation est détecté.
  12. Procédé selon la revendication 11, caractérisé en ce que le compteur électronique augmente en permanence pendant la durée d'un pompage à aspiration détecté ou en ce que le compteur électronique augmente d'un pas de comptage pendant la durée d'un pompage à aspiration détecté.
  13. Machine à laver comprenant une cuve de lavage et un système de pompes à recirculation permettant de faire circuler de la solution détergente dans la cuve de lavage à différents débits volumiques et un dispositif de réglage du système de pompes à recirculation, le dispositif de réglage étant configuré et conçu de manière à exécuter un procédé de réglage du système de pompes à recirculation selon l'une des revendications précédentes en cas d'usage conforme de la machine à laver.
EP15162579.5A 2014-04-17 2015-04-07 Procédé de réglage d'un système de pompes à recirculation Active EP2933365B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201410105527 DE102014105527B3 (de) 2014-04-17 2014-04-17 Verfahren zur Regelung eines Umflutungspumpen-Systems

Publications (2)

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EP2933365A1 EP2933365A1 (fr) 2015-10-21
EP2933365B1 true EP2933365B1 (fr) 2019-04-24

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DE (1) DE102014105527B3 (fr)
TR (1) TR201907559T4 (fr)

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WO2014071980A1 (fr) 2012-11-08 2014-05-15 Electrolux Home Products Corporation N. V. Détection d'un mode de fonctionnement d'un lave-vaisselle
EP3359008A1 (fr) * 2015-10-07 2018-08-15 Electrolux Appliances Aktiebolag Procédé de commande de pompe de circulation dans un appareil de lavage et de rinçage d'articles
US10595703B2 (en) 2015-11-10 2020-03-24 Electrolux Appliances Aktiebolag Method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods, and appliance and computer program therewith
WO2017088917A1 (fr) 2015-11-25 2017-06-01 Electrolux Appliances Aktiebolag Procédé pour déterminer si de l'eau de traitement a été ajoutée à un réservoir d'un appareil de lavage et de rinçage de produits au cours d'une interruption du fonctionnement de l'appareil
WO2017140335A1 (fr) 2016-02-15 2017-08-24 Electrolux Appliances Aktiebolag Détection d'écoulement d'eau de traitement dans une pompe de circulation
DE102016216737B4 (de) * 2016-09-05 2018-03-15 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
DE102017201008B3 (de) 2017-01-23 2018-06-21 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
CN110167412A (zh) 2017-02-24 2019-08-23 伊莱克斯电器股份公司 用于处理堵塞状况的洗碗机、方法和控制系统
DE102017211569A1 (de) 2017-07-06 2019-01-10 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit verbessertem Pumpbetrieb bei zweiphasigen Fluiden und hierzu geeignete Waschmaschine
DE102017211571A1 (de) 2017-07-06 2019-01-10 BSH Hausgeräte GmbH Verfahren zum Betrieb eines wasserführenden Haushaltsgerätes mit verbesserter Bestimmung einer Leerlauflast einer Pumpe und Haushaltsgerät hierfür
DE102017211573A1 (de) 2017-07-06 2019-01-10 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit verbesserter Pumpenzustandserkennung und hierzu geeignete Waschmaschine
DE102017115622A1 (de) * 2017-07-12 2019-01-17 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Verfahren zur Niveauregelung in einem Behälter

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Publication number Publication date
TR201907559T4 (tr) 2019-06-21
DE102014105527B3 (de) 2015-04-16
EP2933365A1 (fr) 2015-10-21

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