EP0223649B1 - Waschmaschine mit einem Thermostat für die Kontrolle der Wassertemperatur - Google Patents

Waschmaschine mit einem Thermostat für die Kontrolle der Wassertemperatur Download PDF

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Publication number
EP0223649B1
EP0223649B1 EP86402239A EP86402239A EP0223649B1 EP 0223649 B1 EP0223649 B1 EP 0223649B1 EP 86402239 A EP86402239 A EP 86402239A EP 86402239 A EP86402239 A EP 86402239A EP 0223649 B1 EP0223649 B1 EP 0223649B1
Authority
EP
European Patent Office
Prior art keywords
switch
washing machine
micromotor
temperature
water
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.)
Expired
Application number
EP86402239A
Other languages
English (en)
French (fr)
Other versions
EP0223649B2 (de
EP0223649A1 (de
Inventor
Bernard Delhomme
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.)
Compagnie Industrielle dAppareils Menagers SA CIAPEM
Original Assignee
Compagnie Industrielle dAppareils Menagers SA CIAPEM
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Publication date
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Application filed by Compagnie Industrielle dAppareils Menagers SA CIAPEM filed Critical Compagnie Industrielle dAppareils Menagers SA CIAPEM
Priority to AT86402239T priority Critical patent/ATE43373T1/de
Publication of EP0223649A1 publication Critical patent/EP0223649A1/de
Application granted granted Critical
Publication of EP0223649B1 publication Critical patent/EP0223649B1/de
Publication of EP0223649B2 publication Critical patent/EP0223649B2/de
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/10—Temperature of washing liquids; Heating means therefor

Definitions

  • the invention relates to a washing machine.
  • a machine of this kind usually comprises a perforated drum containing the laundry rotating inside a tank intended to receive the washing or rinsing water, or the water expelled from the laundry during spinning.
  • a heating resistor is placed at the bottom of the tank to bring the washing water to a chosen temperature: 30 ° C, 40 ° C ... 90 ° C, etc.
  • a control device ensures the fully automatic operation of the washing machine (see FR-A-1 555 955).
  • the latter includes a programmer most often of the electromechanical type, that is to say comprising an electric motor (called “micromotor” so as not to be confused with the drive motor of the drum) which drives cams acting on the state of switches or wired contacts with the various parts of the machine: solenoid valve, motor, micromotor, drain pump, heating resistor, etc.
  • Such an electromechanical programmer can be associated with a circuit for controlling the speed of rotation of the drum drive motor, in particular during wringing which can cause, due to the high speed of rotation of the drum, vibrations dangerous for the machine. .
  • Such a circuit acts for example on a controlled switch, preferably in solid state such as a triac, in series with the drum drive motor in order to control the conduction phase of this switch at each period of the alternating signal of power supply, the conduction time of the static switch being, in each period, a function of the desired speed.
  • a controlled switch preferably in solid state such as a triac
  • a temperature control switch is generally arranged in series with the water heating resistor; it is opened when the desired temperature is reached.
  • a temperature control switch has been either an electromechanical bulb thermostat or an electronic thermostat.
  • An electromechanical bulb thermostat constitutes a mechanical assembly of a delicate and therefore expensive construction.
  • such a bulb thermostat is often associated with a cam system - part of the electromechanical programmer - fast forward to go to the next step of the machine execution program as soon as the desired temperature is reached, this which further complicates the production of the programmer.
  • a so-called electronic thermostat comprises a thermistor or similar detector, a power switch or relay in series with the heating resistor, and an interface circuit for controlling this switch or relay as a function of the signal supplied by the thermistor or the like.
  • Such a set is of a high price.
  • the invention overcomes the drawbacks mentioned above.
  • the washing machine comprises a water heating element supplied with energy depending on the state, open or closed of a switch of an electromechanical programmer comprising cams driven by an electric micromotor and means temperature control to interrupt the supply to the heating element when a desired temperature is reached.
  • the micromotor is in series with a static switch whose conduction state depends on the output signal from a control circuit, such as a microprocessor, receiving, on the one hand, a signal from a water temperature sensor, and on the other hand, a temperature setpoint signal and acting on the conduction of the static switch to rotate the micromotor in order to interrupt the supply of the heating element when the set temperature is reached.
  • the control circuit thus controls the micromotor and does not act directly on the power circuit (the water heating resistance), which allows a relatively inexpensive embodiment, without power relay.
  • microprocessor does not complicate the production of the machine because this microprocessor can also be used to command or control the speed of rotation of the drum drive motor.
  • the electromechanical programmer does not have a fast-forward cam.
  • the drum (not shown) is rotated by an electric motor (also not shown) of the universal type in series with a triac (not shown), the conduction of which depends on an output signal from a microprocessor 10, which allows to control the rotation speed of this motor.
  • the presence of the microprocessor for controlling the speed of the drum drive motor is used to control, in a simple manner, the supply of the resistor 11 for heating the water in the tank of the washing machine.
  • the microprocessor 10 has inputs 10 1 and 10 2 for the introduction of the signal from a temperature sensor 12 such as a thermistor, and inputs 10s and 10 4 receiving the signal supplied by a setpoint means of temperature 13 such as a potentiometer.
  • a temperature sensor 12 such as a thermistor
  • inputs 10s and 10 4 receiving the signal supplied by a setpoint means of temperature 13 such as a potentiometer.
  • An output 10s of the microprocessor 10 is connected to the trigger 15 of a triac 14, one terminal of which is connected directly to a first terminal 16 to which the AC power supply signal is applied and the other terminal of which is connected to a end 17 1 of a switch 17, the second end 17 2 of which is connected to a first terminal 18 1 of a micromotor 18 for driving the cams (not shown) of an electromechanical programmer.
  • the second terminal 18 2 of the micromotor 18 is connected to the second terminal 19 for supplying alternating current.
  • Terminal 18 1 of micromotor 18 and terminal 17 2 of switch 17 are connected to terminal 20 1 of switch 20 which, like switch 17, is part of the electromechanical programmer.
  • the second terminal 20 2 of the switch 20 is connected di directly to terminal 16 supply.
  • the position of the switches 17 and 20 depends on the position of the cams driven by the micromotor 18.
  • the resistor 11 for heating the water is, moreover, in series with another switch 21 of the electromechanical programmer as well as with a pressure switch 22 which is a switch closed only when the level of water in the tank exceeds a height predetermined.
  • the series assembly of the resistor 11 and of the switches 21 and 22 is disposed between the terminals 16 and 19.
  • the switches 21 and 22 are closed, which puts the water heating resistor 11 under tension. At this time the switch 17 is closed and the switch 20 is open.
  • the triac 14 remains blocked as long as the water temperature has not reached the set value set by the potentiometer 13.
  • the microprocessor 10 compares the signals supplied by the thermistor 12 and by the potentiometer 13 and when these signals are equal a signal is delivered on the output 10 5 to make the triac 14 conductive in order to energize the micromotor 18.
  • the micromotor 18 is stopped as long as the triac 14 is blocked; it follows that the switches 17, 20 and 21 remain in the position indicated above: the switch 17 is closed, the switch 20 is open and the switch 21 is closed.
  • the triac 14 is conductive, that is to say when the water temperature is the desired one, the micromotor 18 rotates to drive the cam (s) which allow (tent) to open the switch 21, to open the switch 17 and to close the switch 20.
  • the micromotor 18 is continuously supplied by means of the switch 20 and the state of the triac 14 has no effect on the power supply of this micromotor.
  • n the number of setpoint temperatures that it is desired to be able to choose.
  • thermoistor encompasses any type of temperature sensor.

Landscapes

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

Claims (7)

1. Waschmaschine mit einem Heizelement (11) zur Erwärmung des Wassers, das in Abhängigkeit von dem offenen oder von dem geschlossenen Zustand eines Unterbrechers (21) eines elektromechanischen Programmiergeräts mit durch einen elektrischen Mikromotor (18) angetriebenen Nocken mit Energie versorgt wird, sowie mit Mitteln zur Steuerung der Temperatur, um die Versorgung des Heizelements (11) zu unterbrechen, wenn eine erwünschte Temperatur erreicht ist, dadurch gekennzeichnet, daß der Mikromotor (18) mit einem statischen Unterbrecher (14) in Reihe geschaltet ist, dessen Leitungszustand von dem Ausgangssignal einer Steuerschaltung (10) abhängt, die einerseits ein Signal aus einem Fühler (12) für die Temperatur des Wassers und andererseits ein Sollsignal für die Temperatur empfängt, und auf die Leitfähigkeit des statischen Unterbrechers einwirkt, um den Mikromotor drehen zu lassen, damit die Versorgung des Heizelements (11) unterbrochen wird, wenn die Solltemperatur erreicht ist.
2. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß ein Umschalter (17, 20) für das elektromechanische Programmiergerät vorgesehen ist, damit während der Perioden der Wassererwärmung der Mikromotor (18) über den statischen Unterbrecher (14) mit Energie versorgt wird und außerhalb dieser Perioden der Leitungszustand dieses statischen Unterbrechers (14) keine Wirkung auf die Versorgung des Mikromotors (18) hat.
3. Waschmaschine nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Steuerschaltung (10) ein Mikroprozessor ist.
4. Waschmaschine nach Anspruch 3, dadurch gekennzeichnet, daß der Mikroprozessor (10) auch die Rotationsgeschwindigkeit des Motors zum Antreiben der Trommel steuert.
5. Waschmaschine nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Sollsignal für die Wassertemperatur durch ein Potentiometer (13) in die Steuerschaltung eingegeben wird.
6. Waschmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Sollsignal für die Wassertemperatur durch einen Kodierer oder durch einen Schalter oder durch einen Wähler mit n Positionen oder dgl. in die Steuerschaltung (10) eingegeben wird.
7. Waschmaschine nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Temperaturfühler aus einem Thermistor besteht.
EP86402239A 1985-10-11 1986-10-09 Waschmaschine mit einem Thermostat für die Kontrolle der Wassertemperatur Expired - Lifetime EP0223649B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402239T ATE43373T1 (de) 1985-10-11 1986-10-09 Waschmaschine mit einem thermostat fuer die kontrolle der wassertemperatur.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515112 1985-10-11
FR8515112A FR2588580B1 (fr) 1985-10-11 1985-10-11 Lave-linge a thermostat de controle de la temperature de l'eau

Publications (3)

Publication Number Publication Date
EP0223649A1 EP0223649A1 (de) 1987-05-27
EP0223649B1 true EP0223649B1 (de) 1989-05-24
EP0223649B2 EP0223649B2 (de) 1992-10-14

Family

ID=9323755

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402239A Expired - Lifetime EP0223649B2 (de) 1985-10-11 1986-10-09 Waschmaschine mit einem Thermostat für die Kontrolle der Wassertemperatur

Country Status (4)

Country Link
EP (1) EP0223649B2 (de)
AT (1) ATE43373T1 (de)
DE (1) DE3663545D1 (de)
FR (1) FR2588580B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1867775T3 (pl) 2006-06-13 2011-09-30 Electrolux Home Products Corp Nv Układ obwodu do elektrycznego sprzętu gospodarstwa domowego

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1179790A (fr) * 1956-09-08 1959-05-28 Pfenningsberg Gmbh Maschfab Procédé et dispositif pour le maintien de la température de l'eau dans les machines à laver automatiques
GB957944A (en) * 1960-01-15 1964-05-13 English Electric Co Ltd Improvements in or relating to automatic electric washing machines
DE1191329B (de) * 1963-03-02 1965-04-22 Constructa Werke G M B H Mess- und Schaltvorrichtung fuer mit siedender Flotte zu betreibende Waschmaschinen
CH451354A (de) * 1965-01-02 1968-05-15 Scharpf Gebr Kg Maschinenfabrik Temperatursteuereinrichtung
DE1588274A1 (de) * 1967-01-31 1970-05-14 Walter Holzer Anordnung zur programmabhaengigen Steuerung,insbesondere einer vollautomatischen Waschmaschine
DE2045500A1 (de) * 1970-09-07 1972-03-16 Siemens-Electrogeräte GmbH, 1000 Berlin u. 8000 München Zum Trocknen der Wäsche ausgerüstete Trommelwaschmaschine
DE2923007C2 (de) * 1979-06-07 1985-08-01 Miele & Cie GmbH & Co, 4830 Gütersloh Programmsteueranordnung für Waschmaschinen
DE3324482A1 (de) * 1983-07-07 1985-01-24 Miele & Cie GmbH & Co, 4830 Gütersloh Mikrocomputergesteuertes programmschaltwerk fuer haushaltsgeraete

Also Published As

Publication number Publication date
EP0223649B2 (de) 1992-10-14
FR2588580B1 (fr) 1988-04-08
EP0223649A1 (de) 1987-05-27
DE3663545D1 (en) 1989-06-29
FR2588580A1 (fr) 1987-04-17
ATE43373T1 (de) 1989-06-15

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