EP0687761B1 - Mehrprogramm-waschmaschine mit einem elektromechanischen Schaltwerk und einer digitalen Steuereinheit - Google Patents

Mehrprogramm-waschmaschine mit einem elektromechanischen Schaltwerk und einer digitalen Steuereinheit Download PDF

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Publication number
EP0687761B1
EP0687761B1 EP95109280A EP95109280A EP0687761B1 EP 0687761 B1 EP0687761 B1 EP 0687761B1 EP 95109280 A EP95109280 A EP 95109280A EP 95109280 A EP95109280 A EP 95109280A EP 0687761 B1 EP0687761 B1 EP 0687761B1
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EP
European Patent Office
Prior art keywords
washing
machine
motor
machine according
microcontroller
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 - Lifetime
Application number
EP95109280A
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English (en)
French (fr)
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EP0687761A1 (de
Inventor
Costantino Mariotti
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.)
Whirlpool EMEA SpA
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Merloni Elettrodomestici SpA
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Classifications

    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • 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
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the present invention refers to a multiprogram laundry washing machine comprising an electromechanical programmer and an electronic microcontroller for controlling, during said programs, the operation of a motor being provided in said machine, wherein the programmer delivers control codes to said microcontroller.
  • the electronic control device is versatile and easily programmable, but subject to loose its memory in case of power cut-out
  • the conventional electromechanical programmer has little flexibility and cannot be easily modified, but it offers the great advantage of incorporating a mechanical memory preventing any problems in case of a power cut-out.
  • washing machines are developed to provide for various types of washing programs controlled by one programmer, which can be selected by the user according to his specific needs, to the extent and type of soil to be removed and to the characteristics of the clothes to be washed.
  • a conventional electromechanical programmer of a household washing-machine has three basic programs:
  • Special programs are derived from these three basic programs, and are currently possible starting from any basic program; said special programs are merely partial programs, comprising only a part of the basic program cycles (program with no prewashing, only rinse program, only spin program, etc.), so that the washing-machine can usually offer 12 or more washing programs on the market place.
  • T indicates an electromechanical cycle sequencer or timer which provides for three basic washing programs (cotton, synthetics, wool);
  • ME indicates an electronic digital module controlling a washing motor M;
  • ME module comprises an electronic microcontroller MP including a counter or internal clock, CLOCK, associated with permanent memory means, ROM, and read-and-write memory means, indicated with RAM;
  • permanent ROM memory contains the handling functional programs of washing-machine motor M, whereas RAM memory is used to store working parameters;
  • TAC indicates a speedometer dynamo, i.e.
  • P1 and P2 indicate two level sensors, such as two pressure switches to control the fluid level in the machine washing tub; EVF indicates a solenoid valve for water inlet in the machine washing tub. Finally, A indicates a key located between the connecting lines from timer T to module ME and pressure switches P1 and P2.
  • Fig. 1 The machine shown in Fig. 1 operates as follows:
  • the user introduces the laundry in the machine drum, selects the desired washing program (eg. synthetics program) actuating the timer knob and starts the machine through its main ON/OFF switch.
  • the machine executes the selected cycle in its usual known manner, requiring no further explanations for it.
  • the programmer or timer T sends binary code signals to module ME; according to said binary codes microcontroller MP identifies within its ROM memory the motor M operative programs for the various cycle steps; in other words, based on said binary codes microcontroller MP knows how motor M should operate, i.e. activation and rest times for drum rotation, its speed during wash, its speed during spinning, etc.
  • Key A is practically a control element used to substantially modify a basic wash-cycle selected by the timer, by changing the binary codes sent by the timer to module ME; in the example shown in Fig. 1, key A also actuates pressure switches P1 and P2 to change the quantity of fluid the machine tub will take in against a basic program.
  • Fig. 2 shows a simplified wiring plan of the programming device for a washing machine according to a variant embodiment of the present invention.
  • the programming device shown in Fig. 2 consists of:
  • I1 indicates the machine ON/OFF key, whereas 12 indicates the spin exclusion key; 13 indicates the "Economy" program (half load) and A indicates the key to execute the dedicated program according to the invention, i.e. "extra delicate wash-program” or "curtains wash-program".
  • the timer has 4 commuting contacts sets indicated by symbols A 1 -A 12 , B 1 -B 12 , C 1 -C 12 , D 1 -D 12 . These contacts are controlled by a cam system made to rotate by the entraining motor MT.
  • the timer also controls operation of both pressure switches P1 (first level) and P2 (second level), of the inlet solenoid valve EVF, of an outlet pump PS and of a heating element RR to heat the washing liquid inside the washing-machine tub.
  • the electronic module ME has a first terminals set (power contacts) connecting the module to the washing motor windings (terminals 2,3,4) and to power (terminals 6,7) and a second terminals set (signal contacts) connecting the module to the pressure switches (terminals 9-11), to the speedometer TAC (terminals 19-20) and to the timer (code contacts 13,14,15,16; spin enable contact 18).
  • module ME comprises a microcontroller, i.e. a central control unit (MP), coupled with a read-only memory (ROM) containing the motor handling operative programs and with a read-and-write memory (RAM) for working parameters storage.
  • MP central control unit
  • ROM read-only memory
  • RAM read-and-write memory
  • the module also includes some power actuators (TRIAC) for washing motor control.
  • the timer transmits to the module a 4-code related to the characteristics with which the motor has to be controlled during each washing phase, in particular the rotation speed (rpm) and the motion/stop ratio (duty cycle), i.e. the type of motion (eg. 80%, if the motor is activated 12 secs against 15 secs).
  • the main control unit of module ME provides, according to the code received from the timer, for searching the corresponding program in the ROM memory, eg code 1000 corresponds to "motor still stand", code 1001 corresponds to 55 rpm speed, 80% duty cycle, and so on.
  • key A comprises two parts, i.e. 4 contacts which are closed in pairs when the key is pressed down; key A is located between the circuit of both pressure switches P1 and P2 on one side and between the timer circuit and terminals 13,13,15,16 of the electronic module ME, on the other side (more precisely, in the wiring plan, between timer contact B 1 and terminal 15 of the electronic module ME).
  • key A When key A is pressed down, it provides with its first section to maintain the information, for the inlet solenoid valve EVF (through contacts 21-22 of P2), to allow water loading, also after the first pressure switch P1 has changed its position (from contact 12 to contact 14), so that water will continue entering the tub - even if the washing motor starts rotating - till the second pressure switch P2 does not switch in.
  • the second section of key A adds a bit to the code transmitted by the timer to the module (which will go eg. from 1001 to 1101), with the result of enabling a different program, i.e. to decrease washing speed (eg. from 55 rpm to 35 rpm) and the motion/stop ratio (eg. from 80% to 20%).
  • Fig. 4 shows only by way of example a comparison between two tables listing the motor motion steps sequence of the basic synthetic washing program and of the program suitable for extra-delicate or curtains washing according to the invention.
  • the first column indicates the phase start foreseen by the selected program; the second column indicates the fluid level changes entering the washing tub (variable from first to second level), the third column indicates the timer step (representative of the cycle advancement) during which pre-set functions as specified in the fourth column are executed; finally, the fifth column represents the code sent by the timer to the electronic module ME to control the washing-machine motor and achieve the function shown in the fourth column.
  • the meanings of the abbreviations reported in the tables in Fig. 4 are :
  • the above description refers to a merely explicative and non limiting example both in respect to the circuit section and to the extra-delicate washing method.
  • Many changes may in fact be introduced in the wiring plan shown by way of example: eg. the second section of key A may be inserted on terminal 16 of module ME instead of terminal 15, acting on the most significant code bit.
  • the characteristics of the added dedicated program may be different from the above description to obtain specific programs for other laundry types or washing types.
  • FIG. 3 a simplified block diagram shows the machine operating principle according to the present invention in a particularly favourable embodiment.
  • IC indicates a controlled electronic switch, such as a triac and MT indicates the timer control motor.
  • ROM memory also stores some tables used by microcontroller MP to determine, when key A is pressed, motor MT enable and disable times for timer T during the phases of the selected washing cycle.
  • Said tables in ROM memory and internal CLOCK allow microcontroller MP to monitor IC switch to deliver determined enable and disable times of timer motor MT, which according to the suggested modification can be pulse powered.
  • the machine user selects the start cycle, eg. the synthetics program, actuating the electromechanical sequencer knob and the specific extra-delicate program by pressing key A. Then the machine can be started through the main switch.
  • the start cycle eg. the synthetics program
  • the machine executes the extra-delicate washing program as described above with reference to Figs. 1 and 2, however in this case also the times dictated by the cycle sequencer and established according to the known state of the art can be amended.
  • microcontroller MP From the modified binary codes by pressing key A and sent from timer T to module ME and through the data of the additional tables stored in ROM memory, microcontroller MP is in a position to establish enable and disable times of timer motor MP for one or more different phases for the selected washing cycle.
  • microcontroller MP upon detection of a modified code being received (eg. code 5 in the above table) and using the data of the stored table, microcontroller MP will feed timer motor MT through switch IC for 12 secs and stop feeding for 48 secs, for a given number of times.
  • a modified code eg. code 5 in the above table
  • a concrete example can be made with reference to a sequencer cam, eg. the one enabling a rinse phase execution, assuming the profile of said cam to be capable of keeping closed the electric contact enabling motor M rotation for 3 minutes under continuous rotating condition of timer motor MT.
  • said 3 minutes cam reading can be "extended” according to the data contained in ROM memory.
  • pulse powering motor MT of the electromechanical sequencer so that also the cams of interest advance by pulse as soon as the relevant contacts are enabled.
  • microcontroller MP can have timer motor MT powered through switch IC for 12 secs, stop feeding for 48 secs. then feed it for another 12 secs and then stop it again for 48 secs, and so on till the cam profile of interest is not fully read by its sensor.
  • microcontroller MP can modify or not duration time of each phase as a function of the modified code received.
  • pressing key A allows to modify the fluid level, the fluid temperature and the laundry motion, i.e. to modify the chemical action, the thermal action and the washing mechanical action in respect to one of the three conventional basic programs.
  • the invention described above can be easily applied also in the field of dishwashers, whenever there is a need to add some delicate washing programs and/or the need of allowing "extension" of substantial fixed times dictated by an electromechanical timer by modifying a basic program (eg. to properly handle washing pump power in case of particularly delicate crockery or extend specific washing and/or rinse phases, in case of heavily soiled crockery).
  • a basic program eg. to properly handle washing pump power in case of particularly delicate crockery or extend specific washing and/or rinse phases, in case of heavily soiled crockery.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (12)

  1. Mehrprogramm-Waschmaschine, enthaltend:
    eine elektromechanische Programmiereinrichtung (T, MT, A1-A12, B1-B12, C1-C12, D1-D12) zum Auswählen einer Vielzahl von Basiswaschprogrammen,
    Pegelsensormittel (P1, P2) zum Einstellen des Pegels der der Waschmaschine während der Basiswaschprogramme zu zuführenden Flüssigkeit,
    einen elektronischen Mikrokontroller (ME, MP) zum Steuern des Betriebs eines in der Maschine vorgesehenen Motors (M) während der Basiswaschprogramme,
    wobei die elektromechanische Programmiereinrichtung (T, MT, A1-A12, B1-B12, C1-C12, D1-D12) an den Mikrocontroller (ME, MP) Steuercodes überträgt und den Betrieb der Pegelsensormittel (P1, P2) steuert, und
    ein von Hand betätigbares Steuerelement,
    dadurch gekennzeichnet, daß die Betätigung des Steuerelements (A) sowohl die von der elektromechanischen Programmiereinrichtung (T, MT, A1-A12, B1-B12, C1-C12, D1-D12) an den elektronischen Mikrokontroller (ME, MP) übertragenen Codes als auch den Pegel der der Maschine zu zuführenden Flüssigkeit modifiziert.
  2. Waschmaschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Codes die Codes enthalten, die durch den elektronischen Mikrokontroller (ME, MP) zum Steuern des Betriebs eines in der Maschine vorgesehenen Motors (M) verwendet werden.
  3. Waschmaschine nach Anspruch 1,
    dadurch gekennzeichnet, daß das Steuerelement (A) darüber hinaus die Zusatzzeiten eines Motors (MT), der Teil der elektromechanischen Programmiereinrichtung (T, MT, A1-A12, B1-B12, C1-C12, D1-D12) ist, ebenfalls modifiziert, um die Zeiten eines oder mehrerer Steuerphasen zu ändern, die durch das ausgewählte Waschprogramm vorgesehen sind.
  4. Waschmaschine nach Anspruch 1,
    dadurch gekennzeichnet, daß das Steuerelement eine Taste (A) enthält, die, wenn sie betätigt wird, den Wert zumindest eines Bits der Codes modifiziert, die an den Mikrokontroller (ME, MP) übertragen werden, wobei das modifizierte Bit insbesondere das signifikanteste Bit ist.
  5. Waschmaschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Waschmaschine eine Wäschewaschmaschine ist und daß das Steuerelement (A) ein Extraschonprogramm, insbesondere ein Vorhangwaschprogramm ausführt.
  6. Waschmaschine nach Anspruch 5,
    dadurch gekennzeichnet, daß das Extraschonprogramm aus einem Synthetikwaschprogramm abgeleitet ist und insbesondere enthält:
    einen gesteigerten Wassereinlaß,
    eine verringerte Waschdrehzahl (35 min-1),
    eine kürzere Trommelbewegungszeit (20%),
    die Unterdrückung der Schleuderphase,
    die Motorunterbrechung während bestimmter Phasen.
  7. Waschmaschine nach Anspruch 3,
    dadurch gekennzeichnet, daß elektrische Steuermittel (MP, IC) vorgesehen sind, welche bei Betätigung des Steuerelements (A) in der Lage sind, die Energie des Motors (MT) der elektromechanischen Programmiereinrichtung (T, MT, A1-A12, B1-B12, C1-C12, D1-D12) zu pulsen, d.h. Energiephasen des Motors (MT) mit Nicht-Energiephasen des Motors (MT) abzuwechseln.
  8. Waschmaschine nach Anspruch 7,
    dadurch gekennzeichnet, daß die elektrischen Steuermittel (MP, IC) den Mikrokontroller (MP) mit zugehörigen Taktmitteln (CLOCK), Permanentspeichermitteln (ME) und einen elektronischen Schalter (IC), insbesondere einen Triac, der durch den Mikrokontroller (MP) gesteuert wird, enthalten.
  9. Waschmaschine nach Anspruch 8,
    dadurch gekennzeichnet, daß die Speichermittel (ME) Informationen enthalten, die die Zeiten des Motors (MT) kennzeichnen, in denen der Motor (MT) mit Energie gespeist wird und in denen der Motor außer Betrieb ist, wenn das Steuerelement (A) betätigt wird.
  10. Waschmaschine nach Anspruch 8 und 9,
    dadurch gekennzeichnet, daß der Mikrokontroller (MP) den gesteuerten Schalter (IC) für die Pulsenergie des Motors (MT) auf Basis einer Funktion eines Signals aus dem Steuerelement (A) steuert.
  11. Waschmaschine nach zumindestens einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß die Waschmaschine eine Wäschewaschmaschine ist und daß das Steuerelement (A) eine oder mehrere Steuerphasen ausdehnt, die durch das ausgewählte Waschprogramm vorgesehen sind, wie das Tränken, Bleichen oder Spülen.
  12. Waschmaschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Waschmaschine eine Geschirrspülmaschine ist und daß das Steuerelement (A) weiterhin den Betrieb einer Waschpumpe, beispielsweise im Falle besonders speziellen Geschirrs modifiziert und/oder bestimmte Wasch- und/oder Spülphasen, beispielsweise im Falle von schwer verschmutztem Geschirr ausdehnt.
EP95109280A 1994-06-16 1995-06-15 Mehrprogramm-waschmaschine mit einem elektromechanischen Schaltwerk und einer digitalen Steuereinheit Expired - Lifetime EP0687761B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO940497 1994-06-16
IT94TO000497A IT1266862B1 (it) 1994-06-16 1994-06-16 Macchina di lavaggi multiprogrammi con un programmatore eletttromeccanico ed un microcontrollatore digitale.

Publications (2)

Publication Number Publication Date
EP0687761A1 EP0687761A1 (de) 1995-12-20
EP0687761B1 true EP0687761B1 (de) 2000-11-02

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EP95109280A Expired - Lifetime EP0687761B1 (de) 1994-06-16 1995-06-15 Mehrprogramm-waschmaschine mit einem elektromechanischen Schaltwerk und einer digitalen Steuereinheit

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EP (1) EP0687761B1 (de)
DE (1) DE69519255T2 (de)
ES (1) ES2152344T3 (de)
IT (1) IT1266862B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818376A1 (de) * 1998-04-24 1999-10-28 Ako Werke Gmbh & Co Hybrid-Programmsteuereinrichtung, insbesondere für eine Waschmaschine
US6020698A (en) * 1998-10-09 2000-02-01 Whirlpool Corporation Timer for use with an electronic control in controlling an appliance
ATE530697T1 (de) * 2009-09-02 2011-11-15 Miele & Cie Verfahren zum betreiben einer waschmaschine, sowie steuereinrichtung und waschmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303992A1 (de) * 1983-02-05 1984-08-09 Miele & Cie GmbH & Co, 4830 Gütersloh Programmschaltwerk fuer waeschebehandlungs- und geschirrspuelmaschinen
IT1189491B (it) * 1986-05-08 1988-02-04 Candy Elettrodomestici Dispositivo per lo svolgimento dei programmi particolarmente per macchine lavatrici
JP2966461B2 (ja) * 1990-03-09 1999-10-25 株式会社日立製作所 洗濯機の制御装置
US5211037A (en) * 1990-08-13 1993-05-18 Raytheon Company Controller for washing machine with alternately reversing drive motor
FR2674065B1 (fr) * 1991-03-12 1996-09-20 Ciapem Appareil electromenager a programmateur comprenant une base de temps electromecanique et une base de temps electronique.

Also Published As

Publication number Publication date
EP0687761A1 (de) 1995-12-20
IT1266862B1 (it) 1997-01-21
ES2152344T3 (es) 2001-02-01
DE69519255T2 (de) 2001-06-07
ITTO940497A1 (it) 1995-12-16
DE69519255D1 (de) 2000-12-07
ITTO940497A0 (it) 1994-06-16

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