EP1970480A1 - 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
EP1970480A1
EP1970480A1 EP08003061A EP08003061A EP1970480A1 EP 1970480 A1 EP1970480 A1 EP 1970480A1 EP 08003061 A EP08003061 A EP 08003061A EP 08003061 A EP08003061 A EP 08003061A EP 1970480 A1 EP1970480 A1 EP 1970480A1
Authority
EP
European Patent Office
Prior art keywords
heating
value
power
radiator
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08003061A
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German (de)
English (en)
Other versions
EP1970480B1 (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
Original Assignee
Miele und Cie KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP1970480A1 publication Critical patent/EP1970480A1/fr
Application granted granted Critical
Publication of EP1970480B1 publication Critical patent/EP1970480B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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.
  • this solution is disadvantageous, since there is a risk that the default lye temperature is not reached with a reduction of the setpoint. 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 and by a method for operating a washing machine or a washer-dryer with the features of claim 5.
  • the object is further achieved by a heating device with the features of claim 10 and by a washing machine or a washer-dryer with the features of claim 13 or 14.
  • At least a first value and a second value are used for the provision of the electrical power, wherein, depending on the is determined, the value of the electric power for the heating conductor is selected, 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 with the second value for the electrical power, wherein the second value is smaller than the first value, but greater than zero.
  • the initially steep rise in temperature goes over in a flatter temperature rise, whereby the heating time of the washing liquid increases.
  • the washing cycle can be carried out without interruption. It also protects the radiator from overheating, which improves the life and thus the overall availability of the washing machine.
  • the second value is about half of the first value for the power supplied to the radiator. Halving the original value ensures that the temperature increase to be continued is not too strong.
  • more than two values are provided for the provision of the electrical power for the heating conductor, which values are selected as a function of the ascertained temperature rise, and with which the operation of the heating body is to be continued.
  • the power supplied to the heating conductor can be adapted almost exactly to the heat transfer behavior, whereby overheating is reliably prevented.
  • the heating conductor is a slightly reduced electrical power is supplied.
  • the time for the heating of the washing liquid or treatment liquid is only minimally prolonged. If the calcification increases over time, the electrical energy supplied to the heating conductor is correspondingly reduced. The time for the heating of the washing liquid or treatment liquid therefore gradually increases.
  • the heating device 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
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 Not-in-force 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 true EP1970480A1 (fr) 2008-09-17
EP1970480B1 EP1970480B1 (fr) 2010-09-15

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Application Number Title Priority Date Filing Date
EP08003061A Not-in-force 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080694A1 (it) * 2008-09-23 2010-03-24 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.
WO2018196999A1 (fr) * 2017-04-28 2018-11-01 Electrolux Appliances Aktiebolag Procédé d'élimination d'un dépôt de tartre sur un élément chauffant et appareil électroménager conçu pour mettre en œuvre le procédé
WO2021110621A1 (fr) 2019-12-04 2021-06-10 Fischerwerke Gmbh & Co. Kg Système hybride de durcissement par réaction de michael destiné à être utilisé dans une technologie de fixation chimique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE2624514A1 (de) 1976-06-01 1977-12-15 Licentia Gmbh Steueranordnung fuer haushaltswaschmaschinen
EP0380369A1 (fr) 1989-01-26 1990-08-01 Otter Controls Limited Commande pour éléments chauffants à alimentation électrique
DE4244553A1 (de) * 1992-07-09 1994-01-13 Samsung Electronics Co Ltd Vorrichtung und Verfahren zum Verhindern einer Überhitzung der Heizeinrichtung einer Waschmaschine mit Kochwaschgang
EP0859304A1 (fr) 1997-02-14 1998-08-19 AEG Hausgeräte GmbH Methode et dispositif de fixation de la température du milieu d'un procédé, particulièrement du produit de récurage dans une machine à laver
DE19740169A1 (de) 1997-09-12 1999-04-01 Grandi Angelo Cucine Spa Verfahren und Vorrichtung zur Kontrolle der Temperaturregelung beheizbarer Vorrichtungen
DE102004003952A1 (de) 2003-01-24 2004-08-05 Eichenauer Heizelemente Gmbh & Co. Kg Heizeinrichtung zur Beheizung von elektrischen Haushaltsgeräten
EP1507031A1 (fr) 2003-08-13 2005-02-16 Lg Electronics Inc. Appareil de chauffage pour une machine à laver et méthode pour le commander

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DE3045121A1 (de) * 1980-11-29 1982-07-01 Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden Verkalkungsanzeigeschaltung fuer einen elektrischen heisswasserbereiter
GB2109097B (en) * 1981-11-10 1985-04-17 Pa Management Consult Improvements in water heating arrangements
DE8901904U1 (de) * 1989-02-17 1989-07-20 Lechmetall Landsberg GmbH, 8910 Landsberg Dampferzeuger für Gargeräte mit Entkalkungseinrichtung
DE19727357B4 (de) * 1997-06-27 2004-08-26 Judo Wasseraufbereitung Gmbh Vorrichtung und Verfahren zur physikalischen Wasserbehandlung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624514A1 (de) 1976-06-01 1977-12-15 Licentia Gmbh Steueranordnung fuer haushaltswaschmaschinen
EP0380369A1 (fr) 1989-01-26 1990-08-01 Otter Controls Limited Commande pour éléments chauffants à alimentation électrique
DE4244553A1 (de) * 1992-07-09 1994-01-13 Samsung Electronics Co Ltd Vorrichtung und Verfahren zum Verhindern einer Überhitzung der Heizeinrichtung einer Waschmaschine mit Kochwaschgang
DE4244553C2 (de) 1992-07-09 2003-04-24 Samsung Electronics Co Ltd Vorrichtung und Verfahren zum Verhindern einer Überhitzung der Heizeinrichtung einer Waschmaschine mit Kochwaschgang
EP0859304A1 (fr) 1997-02-14 1998-08-19 AEG Hausgeräte GmbH Methode et dispositif de fixation de la température du milieu d'un procédé, particulièrement du produit de récurage dans une machine à laver
DE19740169A1 (de) 1997-09-12 1999-04-01 Grandi Angelo Cucine Spa Verfahren und Vorrichtung zur Kontrolle der Temperaturregelung beheizbarer Vorrichtungen
DE102004003952A1 (de) 2003-01-24 2004-08-05 Eichenauer Heizelemente Gmbh & Co. Kg Heizeinrichtung zur Beheizung von elektrischen Haushaltsgeräten
EP1507031A1 (fr) 2003-08-13 2005-02-16 Lg Electronics Inc. Appareil de chauffage pour une machine à laver et méthode pour le commander

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080694A1 (it) * 2008-09-23 2010-03-24 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.
EP2543762A3 (fr) * 2008-09-23 2014-04-16 Indesit Company S.p.A. Machine a laver, en particulier pour le linge ou machine lavante/séchante ou lave vaisselle équipée d'un dispositif pour mesurer la température de la résistance électrique chauffante utilisée pour préchauffer le liquide de lavage
EP3133199A1 (fr) 2008-09-23 2017-02-22 Whirlpool EMEA S.p.A Procédé d'élimination de dépôts calcaires dans une résistance électrique
WO2018196999A1 (fr) * 2017-04-28 2018-11-01 Electrolux Appliances Aktiebolag Procédé d'élimination d'un dépôt de tartre sur un élément chauffant et appareil électroménager conçu pour mettre en œuvre le procédé
WO2021110621A1 (fr) 2019-12-04 2021-06-10 Fischerwerke Gmbh & Co. Kg Système hybride de durcissement par réaction de michael destiné à être utilisé dans une technologie de fixation chimique
US12180394B2 (en) 2019-12-04 2024-12-31 Fischerwerke Gmbh & Co. Kg Michael-addition-hardening hybrid system for chemical fixing technology

Also Published As

Publication number Publication date
DE502008001281D1 (de) 2010-10-28
EP1970480B1 (fr) 2010-09-15
DE102007012135B3 (de) 2008-06-19
ATE481522T1 (de) 2010-10-15
ES2351100T3 (es) 2011-01-31

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