EP1970480B1 - Procédé de fonctionnement d'un lave-linge, d'un sèche-linge ou d'un dispositif de chauffage électrique dans un lave-linge ou un sèche-linge et lave-linge ou sèche-linge et dispositif de chauffage - Google Patents

Procédé de fonctionnement d'un lave-linge, d'un sèche-linge ou d'un dispositif de chauffage électrique dans un lave-linge ou un sèche-linge et lave-linge ou sèche-linge et dispositif de chauffage Download PDF

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Publication number
EP1970480B1
EP1970480B1 EP08003061A EP08003061A EP1970480B1 EP 1970480 B1 EP1970480 B1 EP 1970480B1 EP 08003061 A EP08003061 A EP 08003061A EP 08003061 A EP08003061 A EP 08003061A EP 1970480 B1 EP1970480 B1 EP 1970480B1
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EP
European Patent Office
Prior art keywords
heating
power
heat conductor
liquid
washing machine
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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.)
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Application number
EP08003061A
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German (de)
English (en)
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EP1970480A1 (fr
Inventor
Hartmut Linnemann
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.)
Miele und Cie KG
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Miele und Cie KG
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Publication date
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Publication of EP1970480A1 publication Critical patent/EP1970480A1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • 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 
    • 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 
    • D06F39/04—Heating arrangements
    • 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
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • 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
    • D06F2105/28—Electric heating
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 

Definitions

  • the invention further relates to a washing machine or a washer-dryer with a control device for carrying out the method.
  • the invention further relates to a method for operating the heating device and to a heating device for carrying out the method.
  • a method of operating a heater is known.
  • the temperature rise is detected by means of sensors, wherein a signal for the temperature control is issued in response to the rate of increase. If the predetermined slew rate is exceeded, the temperature set point of the control unit is reduced if the rise value is exceeded, which on the one hand prevents overheating, but on the other hand influences the process itself. For one Overheating is avoided, however, on the other hand, the process is influenced for itself.
  • this solution is disadvantageous, since there is a risk that the predetermined liquor temperature is not reached when the setpoint is reduced. This is particularly disadvantageous if, for example, for hygienic reasons, a predetermined liquor temperature, for example, 95 ° C for a predetermined time must be strictly adhered to. '
  • a washing machine with a tub and a rotatably mounted therein washing drum is known in which a flat heating element is provided for heating the washing liquid. Since the area performance (heating power per surface) is very high for flat radiators, limescale deposits on the surface can occur after a longer service life. The deposits lead to a reduced heat transfer to the liquid, which may cause the flat heating element to overheat and fail prematurely.
  • a washing machine which has a device for generating steam.
  • a container for the liquid to be evaporated is provided, in which the liquid is heated with a radiator. Via lines and nozzles, the steam is fed into the treatment room or into the interior of the drum.
  • the object is achieved by a method for operating an electrical heating device in a washing machine or a washer-dryer with the features of claim 1.
  • the object is further by a heater with the Characteristics of claim 5 and solved by a washing machine or a washer-dryer with the features of claim 8 or 9.
  • preferred embodiments or developments are listed.
  • At least a first value and a second value are used for the provision of the electrical power, the value for the electric power for the heating conductor being selected as a function of the ascertained temperature rise value, with which the operation of the heating device is continued.
  • the main advantage of the method according to the invention is that the heating operation and thus a washing or treatment cycle does not have to be stopped if, due to contamination or calcification, heat accumulation on the heating conductor can occur.
  • a calcified radiator the heat transfer to the washing liquid is reduced, whereby the heating element can overheat, if it is always operated at the original power value. Therefore, the heating operation is continued with a changed heating power, whereby damage due to overheating is avoided.
  • the heater is operated in the immediately following heating cycle for a predetermined time with the first or an increased power value.
  • the electrical power is supplied to the radiator before the liquid is introduced into the container, whereby a limited overheating of the radiator is achieved.
  • overheating a blasting of the calcification or the lining layer is achieved by the radiator.
  • the detachment of the calcification is improved.
  • the radiator is normally operated, ie when there is no calcification that is too great.
  • the predetermined time for the supply of the increased electrical energy in the range of 5 to 15 seconds.
  • the limitation of overheating to this time does not cause damage to the radiator or the heating element or premature wear.
  • the increased value corresponds to approximately one and a half times to double the power compared to the first value intended for normal heating operation.
  • no special design measures with regard to the cable cross-sections for the supply lines or cross-sections or other design measures for the heating element are provided. This time is also dependent on the sensitivity of the overheating fuse, with a less sensitive fuse longer overheating times, for example, up to 30 seconds are possible.
  • the introduction of the liquid into the container takes place after or during the supply of electrical power and during the overheating of the radiator.
  • the overheated radiator is quenched by the impinging liquid, whereby the chipping of calcifications or dirt is further improved.
  • a heating device which comprises at least one heating element with at least one heating conductor, a temperature sensor and a control device.
  • the control device provides the electrical power for the heating conductor, depending on the respective process steps to be performed.
  • a flat radiator is used as the radiator, which has on the liquid side facing away at least one heating element and the temperature sensor for detecting the temperature of the heating element or the radiator.
  • the temperature sensor comprises a measuring loop which covers the heating conductor at least in regions.
  • the measuring loop extends over a region of the heating element to which the heating conductor is attached, as a result of which almost the entire heating conductor is monitored can be, so that the reliability and accuracy of the measurement is improved. Subareas of the heating conductor with elevated temperatures caused by partial calcifications are also detected or at least taken into account by the measuring loop.
  • a washing machine or a washer-dryer which has a device control, a tub and a heater for heating the washing liquid located in the tub.
  • the heating device comprises at least one heating element with at least one heating conductor, a temperature sensor and a control device for carrying out the described method for providing an electrical power for the heating conductor.
  • the device for generating steam comprises a heating device for heating the liquid to be evaporated, wherein the heating device comprises at least one heating element with at least one heating conductor, a temperature sensor and a control device.
  • the controller is provided for carrying out the described method of providing electrical power to the heating conductor.
  • FIG. 1 is shown in a purely schematic representation as a water-conducting, household electrical appliance, a washing machine with a tub 2.
  • a rotatably mounted drum 3 is arranged for receiving the laundry to be cleaned or treated.
  • the drum 3 is made in the present embodiment of stainless steel and provided with a plurality of openings for the flow, which is not explicitly shown.
  • the liquid 7 is introduced, which is required for cleaning or treating the laundry.
  • a radiator 4 is arranged in the lower region of the tub.
  • a flat radiator 4 is inserted in an opening in the container wall, whose surface is 8 ( Fig. 3 ) is in contact with the interior of the container 2 and with the liquid 7 introduced therein.
  • the radiator 4 and the heat-generating heating element are supplied by the control and monitoring device 5. This means that the electrical energy from the control and monitoring device 5 is supplied to the radiator 4.
  • the supply line 11 is connected to the connection device 10 for the heating conductor 9 (FIG. Fig. 3 ), wherein usually to provide a sufficient electrical power POWER ( Fig. 4 to 7 ), the supply line 11 and the connection device 10 must be designed for high currents.
  • the temperature sensor 12 is connected via the sensor line 14 to the control device 5, wherein the provision of the supplied energy is dependent on the temperature detected by the sensor 12.
  • the control device 5 is in communication with the device control 6 so that default values belonging to the respective set wash program or cycle can be taken into account. For example, washing programs or washing temperatures on the operating handle 15, here a rotary selector switch, selected or set.
  • the flat radiator as in Fig. 2 outlined, has on its side facing away from the liquid, which is the bottom in the proper position of the washing machine, a heating element 9, which is several times s-shaped mounted on the surface.
  • the heating conductor 9 can alternatively or in combination (not shown), for example, helically or meandering be mounted on the surface.
  • the ends of the heating conductor 9 are contacted at the connection device 10, which provides the electrical connection for the at least two-core feed line 11 (FIG. Fig. 1 ).
  • the temperature of the radiator 4 is detected.
  • a measuring loop 13 is used, which extends almost completely over the surface of the radiator 4 in length and covers the heating element 9 at the side facing away from the radiator 4 side. With this measure, the temperature of the heating element 9 itself is detected over a fairly wide range, so that incorrect measurements are avoided.
  • Fig. 3 representing the section AA of the radiator
  • deposits 16 reduce the heat transfer and the heat flow 17 from the surface 8 of the radiator to the washing liquid 7.
  • the mounted on the bottom of the radiator 4 heating element 9 can no longer give off the heat that he normally without deposits on the radiator or could give off the washing liquid. Therefore, there is now the danger of heat build-up and overheating of the heating element.
  • the measuring loop 13 projects beyond individual turns of the heating conductor 9 and, in this example, is connected to the sensor 12, which detects the detected temperature value of the control device 5 (FIG. Fig. 1 ).
  • Fig. 4 is the temperature curve TH for the radiator and for the heated liquid TL over time for normal operation, ie without significant deposits on the radiator 4 ( Fig. 1 . Fig. 3 ) sketched.
  • the full electric power POWER in this example 2 KW
  • the radiator 4 and the heating element 9 is supplied.
  • the heating conductor 9 heats up steadily from this point in time to heat the liquid up to the predetermined value TLV.
  • the radiator 4 is turned off, so that the radiator temperature TH and the liquid temperature TL drops slightly.
  • the heating is switched on again at full power, causing an increase in the radiator temperature TH and the liquid temperature TL. With this switching on and off of the heating, the temperature value TLV for the liquid 7 predetermined by the device control is maintained almost exactly.
  • Fig. 5 It is shown how the heating element 4 heats up more strongly at the same limit value TLOV for the liquid when the heat transfer to the liquid 7 (FIG. Fig. 3 ) is disturbed, for example by calcifications or other deposits 16 ( Fig. 3 ).
  • the frequently achieved overheating can lead to premature wear and damage to the heating conductor 9, the heating element 4 or the adjacent components, for example the container wall 2a (FIG. Fig. 1 ), to lead.
  • the slowing heating of the radiator 4 becomes ensures that the upper limit value for the radiator temperature THV, for example 105 ° C, is not exceeded.
  • the regular operation, in which the supplied power is switched off and on again to maintain the predetermined setpoint temperature or upper limit temperature for the liquid TLV, now begins from the time t 10, that is much later than normal.
  • Fig. 7 an advantageous development of the invention is shown as a diagram.
  • three heating cycles Cycle 1, Cycle 2, Cycle 3 are sketched, which run one after the other. It is not important here that run other process steps for the laundry between the heating cycles.
  • the time information is meant only symbolically and may each require different real times. The times are not related to the times in 4 to 6 .
  • the container 2 has received the predetermined amount of washing liquid 7, so that the water inlet ends (Water off) and the heater 4 is turned on (POWER).
  • the first heating cycle Cycle 1 is completed, wherein no reduced heat transfer has influenced the course of the first cycle Cycle 1.
  • the modified heating cycle Cycle 3 is now started, which does not start with the inlet of the liquid, but with the turning on of the radiator 4.
  • the next heating cycles can be carried out again in normal operation, because the heat transfer has improved again.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (9)

  1. Procédé de fonctionnement d'une machine à laver (1) ou d'un laveur-sécheur, avec un équipement de chauffe électrique, une cuve (2) pour la réception de liquide (7) à chauffer, l'équipement de chauffe comprenant au moins un élément chauffant (4) avec au moins un conducteur de chauffe (9), un capteur de température (12) et un équipement de commande (5) pour la mise à disposition d'une puissance électrique (POWER) pour le conducteur de chauffe (9), avec les étapes :
    d) admission du liquide (7) dans la cuve (2),
    a) mise en circuit de l'élément chauffant (4), par la mise à disposition d'une puissance électrique (POWER) avec une première valeur,
    b) détection de la température (TH) de l'élément chauffant (4) ou du conducteur de chauffe (9) pendant une durée prédéfinie,
    c) détermination de la valeur d'augmentation de la température,
    caractérisé en ce que,
    pour la mise à disposition de la puissance électrique (POWER), il est prévu au moins une première valeur et une deuxième valeur, la valeur de la puissance électrique (POWER) pour le conducteur de chauffe (9) étant sélectionnée en fonction de la valeur d'augmentation de la température déterminée, valeur de la puissance électrique (POWER) avec laquelle le fonctionnement de l'élément chauffant (4) est poursuivi, l'équipement de chauffe étant, en cas de valeur d'augmentation de la température qui est supérieure à une valeur limite paramétrée, mis en fonctionnement dans un cycle de chauffe (cycle 3) qui suit immédiatement, pendant une durée paramétrée, avec la première valeur de puissance ou une valeur de puissance accrue, avant que le liquide (7) soit admis dans la cuve (2), grâce à quoi une surchauffe limitée de l'élément chauffant (4) est atteinte.
  2. Procédé de fonctionnement d'une machine à laver (1) ou d'un laveur-sécheur selon la revendication 1,
    caractérisé en ce que
    la durée paramétrée pour la surchauffe de l'élément chauffant (4) s'inscrit dans la plage de 5 à 15 secondes.
  3. Procédé de fonctionnement d'une machine à laver (1) ou d'un laveur-sécheur selon la revendication 1,
    caractérisé en ce que
    la valeur de puissance accrue correspond environ à une fois et demie à deux fois la puissance par rapport à la première valeur de puissance.
  4. Procédé de fonctionnement d'une machine à laver (1) ou d'un laveur-sécheur selon la revendication 1,
    caractérisé en ce que
    l'admission du liquide (7) dans la cuve (4) s'effectue après ou pendant l'amenée de la puissance électrique (POWER) et pendant la surchauffe de l'élément chauffant.
  5. Equipement de chauffe pour une machine à laver (1) ou un laveur-sécheur, pour le chauffage de liquide de lavage (7) ou de liquide de traitement, l'équipement de chauffe comprenant au moins un élément chauffant (4) avec au moins un conducteur de chauffe (9), un capteur de température (12) et un équipement de commande (5), l'équipement de commande (5) étant prévu pour la réalisation du procédé selon une des revendications 1 à 4 pour la mise à disposition de la puissance électrique (POWER) pour le conducteur de chauffe (9).
  6. Equipement de chauffe selon la revendication 5,
    caractérisé en ce que,
    en tant qu'élément chauffant, il est utilisé un élément chauffant plat (4) qui possède, sur le côté éloigné du liquide, le conducteur de chauffe (9) au moins au nombre de un et le capteur de température (12) pour la détection de la température (TH) du conducteur de chauffe (9) ou de l'élément chauffant (4).
  7. Equipement de chauffe selon la revendication 6,
    caractérisé en ce que
    le capteur de température (12) comprend une boucle de mesure (13) qui recouvre au moins par zones le conducteur de chauffe (9).
  8. Machine à laver (1) ou laveur-sécheur avec une cuve (2) et un équipement de chauffe selon une des revendications 5 à 7 pour le chauffage du liquide de lavage (7) reçu dans la cuve, l'équipement de chauffe comprenant au moins un élément chauffant (4) avec au moins un conducteur de chauffe (9), un capteur de température (12) et une commande d'appareil (6) et/ou un équipement de commande (5), l'équipement de commande (5) étant prévu pour la réalisation du procédé selon une des revendications 1 à 4 pour la mise à disposition de la puissance électrique (POWER) pour le conducteur de chauffe (9).
  9. Machine à laver (1) ou laveur-sécheur avec un équipement pour la production de vapeur et un équipement de chauffe selon une des revendications 5 à 7 pour le chauffage du liquide à évaporer, l'équipement de chauffe comprenant au moins un élément chauffant (4) avec au moins un conducteur de chauffe (9), un capteur de température (12) et une commande d'appareil (6) et/ou un équipement de commande (5), l'équipement de commande (5) étant prévu pour la réalisation du procédé selon une des revendications 1 à 4 pour la mise à disposition de la puissance électrique (POWER) pour le conducteur de chauffe (9).
EP08003061A 2007-03-12 2008-02-20 Procédé de fonctionnement d'un lave-linge, d'un sèche-linge ou d'un dispositif de chauffage électrique dans un lave-linge ou un sèche-linge et lave-linge ou sèche-linge et dispositif de chauffage Active EP1970480B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007012135A DE102007012135B3 (de) 2007-03-12 2007-03-12 Verfahren zum Betreiben einer Waschmaschine oder eines Waschtrockners oder einer elektrischen Heizeinrichtung in einer Waschmaschine oder einem Waschtrockner sowie Waschmaschine oder Waschtrockner und Heizeinrichtung

Publications (2)

Publication Number Publication Date
EP1970480A1 EP1970480A1 (fr) 2008-09-17
EP1970480B1 true EP1970480B1 (fr) 2010-09-15

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EP08003061A Active EP1970480B1 (fr) 2007-03-12 2008-02-20 Procédé de fonctionnement d'un lave-linge, d'un sèche-linge ou d'un dispositif de chauffage électrique dans un lave-linge ou un sèche-linge et lave-linge ou sèche-linge et dispositif de chauffage

Country Status (4)

Country Link
EP (1) EP1970480B1 (fr)
AT (1) ATE481522T1 (fr)
DE (2) DE102007012135B3 (fr)
ES (1) ES2351100T3 (fr)

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IT1391862B1 (it) 2008-09-23 2012-01-27 Indesit Co Spa Macchina di lavaggio, in particolare una lavatrice, una lavasciugatrice o una lavastoviglie provvista di un dispositivo di rilevazione della temperatura della resistenza elettrica di riscaldamento del liquido di lavaggio.
DE102013217276B4 (de) * 2013-08-29 2017-05-04 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer Heizeinrichtung
DE102014019779B4 (de) 2014-09-24 2022-10-06 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Erkennen von Verkalken oder sonstiger Beeinträchtigungen der Funktion einer Heizvorrichtung und Heizvorrichtung
DE102014219347B4 (de) 2014-09-24 2017-09-14 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Überwachen einer Heizvorrichtung und Heizvorrichtung
US20200113406A1 (en) * 2017-04-28 2020-04-16 Electrolux Appliances Aktiebolag Method for removing a deposition of scale on a heating element and a household appliance configured to perform the method
DE102020128713A1 (de) 2019-12-04 2021-06-10 Fischerwerke Gmbh & Co. Kg Michael-Additions-härtendes Hybridsystem für die chemische Befestigungstechnik

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Publication number Publication date
DE102007012135B3 (de) 2008-06-19
EP1970480A1 (fr) 2008-09-17
ATE481522T1 (de) 2010-10-15
ES2351100T3 (es) 2011-01-31
DE502008001281D1 (de) 2010-10-28

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