EP1962011B1 - Appareil de traitement du linge - Google Patents

Appareil de traitement du linge Download PDF

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Publication number
EP1962011B1
EP1962011B1 EP08002417A EP08002417A EP1962011B1 EP 1962011 B1 EP1962011 B1 EP 1962011B1 EP 08002417 A EP08002417 A EP 08002417A EP 08002417 A EP08002417 A EP 08002417A EP 1962011 B1 EP1962011 B1 EP 1962011B1
Authority
EP
European Patent Office
Prior art keywords
control
storage capacitor
laundry treatment
door
controller
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.)
Not-in-force
Application number
EP08002417A
Other languages
German (de)
English (en)
Other versions
EP1962011A1 (fr
Inventor
Helmut Simon
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.)
Diehl AKO Stiftung and Co KG
Original Assignee
Diehl AKO Stiftung and Co 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
Priority claimed from DE102007037767A external-priority patent/DE102007037767A1/de
Application filed by Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Publication of EP1962011A1 publication Critical patent/EP1962011A1/fr
Application granted granted Critical
Publication of EP1962011B1 publication Critical patent/EP1962011B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F34/10—Power supply arrangements, e.g. stand-by circuits
    • 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 
    • D06F39/12—Casings; Tubs
    • D06F39/14—Doors or covers; Securing means therefor
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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
    • D06F2103/40—Opening or locking status of doors

Definitions

  • the present invention relates to a laundry treatment appliance according to the preamble of claim 1.
  • Devices with a hazardous device are provided to prevent improper use with a protective device, which is preferably electrically controlled.
  • a protective device which is preferably electrically controlled.
  • a classic element used to lock the machine door is formed of a bimetal that is heated via a PTC pill, drives a locking cam, and simultaneously closes a contact when the lock is successful. About this contact, ie only with the secure locking of the door, the power elements of the machine is supplied with energy.
  • a door locking element is for example in the GB-A-2,128,283 clearly described. If this door lock element is switched off, Due to the thermal time constant of the bimetal and the PTC pill, the door is only released after a certain delay time has elapsed.
  • a laundry treatment device in which the door locking element and the drive motor via a common switch (eg a triac) are controlled.
  • a common switch eg a triac
  • the door locks when closing either mechanically or is actively locked by a drive pulse.
  • the lock can be deactivated with a magnet of the door locking element without self-delay by driving with short pulses or actively opened to unlock the loading door of the washing machine.
  • Such door locks are mostly controlled solely by switches from the electronics, because this results in a greater freedom in the program design of the laundry treatment. In the event of a short circuit of the control switch, however, the door would be permanently unlocked.
  • it is e.g. State of the art to use two independent drive circuits in series. However, this is expensive in terms of the space consumption of the drive circuit and not cost.
  • Remedy can be achieved, for example, with only simple control to make the door lock so that at least two pulses for unlocking are necessary.
  • a door lock element which operates with a gear and a pawl is in the DE 199 61 083 A1 disclosed.
  • Critical is also in this solution, a state in which the controlling microcomputer generates the two control pulses required for opening due to a malfunction. Another cause for the generation of two control pulses may be due to electromagnetic interference.
  • a solution to the latter problem is to combine the tacho signal, which emits the rotating motor, with the drive circuit of the door locking element. This is done in such a way that the control pulses for opening the lock with rotating drum are prevented by hardware.
  • This conventional driving circuit of a laundry treating machine controls an engine controller 10 of a washing machine drum as an example of an electric one controllable, hazardous device.
  • the supply voltage V1 of the motor controller 10 can be switched on and off by means of a relay 12 as a first control by a microcontroller 14. When the supply voltage V1 is switched off, the dangerous state is no longer present immediately or after a certain time.
  • the relay 12 is usually driven by a transistor or the like switching element 16.
  • a door locking element e.g., the magnetic closure of the washing machine door
  • a second control element 20 which is formed for example as a triac, which receives trigger pulses via a transistor.
  • Both controls 12, 20 of the motor controller 10 and the door lock member 18 have an independent supply voltage. For this reason, the user of the washing machine may be at risk if the door locking element 18 is disabled by a fault in the second control element 20, a software error of the microcontroller 14, an electromagnetic interference or by some other event.
  • the present invention has for its object, a laundry treatment device to develop such that the reliability of its door lock element is further increased.
  • the laundry treatment device includes a motor control, which is controlled by a first control, which in turn is controlled by a controller via a first switching element, and a door locking element, which is controlled by a second control element, wherein the door locking element is deactivated.
  • a motor control which is controlled by a first control, which in turn is controlled by a controller via a first switching element
  • a door locking element which is controlled by a second control element, wherein the door locking element is deactivated.
  • a storage capacitor provided, which supplies the second control element with energy for a control pulse and is loaded with the engine control via the first control and discharged when the engine control via the first switching element.
  • the first and the second control element for the motor control or the door locking element have no independent power supplies, but the energy required to deactivate the door lock element is supplied from a storage capacitor, which is connected between the first and the second control element. Since this storage capacitor is charged with the engine control switched off via the first switching element and discharged with the engine control via the first control, energy is available for deactivating the door lock element in the storage capacitor only when the engine control is switched off and thus no longer endanger the user. In contrast, when the engine controller is in operation, the door lock member can not be deactivated because the storage capacitor is discharged.
  • the laundry treatment appliance according to the invention thus has an intrinsically safe control circuit for the motor control and the door locking element.
  • a charging resistor is connected between the storage capacitor and the first switching element, so that the storage capacitor is charged with a certain time delay. This time delay through the charging resistor is preferably dimensioned so that the hazardous condition is safely terminated by the engine control.
  • a series connection of a discharge resistor and a diode is connected between the storage capacitor and the first control element, so that the storage capacitor can be discharged quickly via the discharge resistor when the motor control is switched on.
  • the second control element is a triac which is triggered by the controller with the energy of the storage capacitor via a second switching element.
  • the second control element is a relay which is energized by the controller with the energy of the storage capacitor via a second switching element.
  • the first control element and the first switching element are integrated in a separate module.
  • the door locking element can be deactivated via at least two control pulses. This ensures that the door lock element can not be deactivated because at least two control pulses are required for deactivation, but the storage capacitor can only provide energy for such a control pulse if it is not recharged.
  • the power supply voltage V1 for the motor control (e.g., frequency converter) 10 of the washing machine is supplied through a first control element 12 in the form of a relay.
  • the driving of the first control element 12 is in turn effected by a controller (e.g., microcontroller) 14 via a first switching element 16 in the form of a transistor, driver, or the like. If the supply of the motor controller 10 with the supply voltage V1 is interrupted by the first control element 12, a dangerous state for the user is no longer present by the motor control 10 after a certain time T, for example, the speed of the laundry drum has dropped below a predetermined limit.
  • a door locking element 18 is also provided, which preferably automatically locks the door for loading the laundry drum and only allows a control of the motor control 10 when the door is securely locked.
  • This door lock element 18 is actuated by the controller 14 via a second control element 20, i. disabled if necessary to unlock the door to allow the door to open. In this case, at least two control pulses of the second control element 20 are required to deactivate the door locking element 18.
  • This second control element 20 for generating the control pulses for deactivating the door locking element 18 via a storage capacitor 22 which is provided between the first and the second control element 12, 20.
  • the storage capacitor 22 is connected via a charging resistor 24 to the first control element 12.
  • the storage capacitor 22 is charged via the charging resistor 24 with the supply voltage V0 of the first control element 12.
  • the time T1 required for charging the storage capacitor 22 is preferably longer than the above time T until the safe state is reached after the motor control 10 has been switched off.
  • the thus charged storage capacitor 22 provides the means for generating the control pulses by the second control element 20, i. for disabling the door lock member 18 required energy available.
  • the energy of the charged storage capacitor 22 is enough to generate a control pulse.
  • the second control element 20 is, for example, a triac which is connected via a second switching element (eg transistor) 30 (see FIG Fig. 3 ) is triggered by the controller 14 with the energy of the storage capacitor 22.
  • the second control element 20 is a relay which is energized via a second switching element 30 by the controller 14 with the energy of the storage capacitor 22.
  • the motor controller 10 If the motor controller 10 is supplied with energy by the first control element 12, the first switching element 16 is turned on. In this state, the storage capacitor 22 discharges via the charging resistor 24 in a certain time. After a short period of time, the door lock element 18 can no longer be deactivated because the storage capacitor 22 does not provide enough energy to generate a control pulse by the second control element 20.
  • any interruption of a connecting line or a component causes either the motor controller 10 can no longer be supplied with energy or that the door locking element 18 can not be deactivated because there is no energy available for this purpose.
  • a faulty control of the door locking element 18 by the controller or EMC interference the wrong deactivation of the Door lock element 18 cause can be avoided. This is also possible if no tacho pulses of the motor are available for evaluation.
  • Fig. 1 illustrated circuit arrangement thus represents an intrinsically safe control circuit, since in each case a hazardous state for a user is prevented.
  • FIG. 2 and 3 A second embodiment of a driving circuit of a washing machine will now be referred to Fig. 2 and 3 explained in more detail.
  • the same or similar components are assigned the same reference numerals and a repeated description thereof is omitted.
  • the second embodiment differs from the above first drive circuit in that a series circuit of a discharge resistor 26 and a diode 28 is connected in parallel to the charging resistor 24. This circuit design allows different times for the charging and discharging of the storage capacitor.
  • the storage capacitor 22 When connecting the supply voltage V1 to the motor controller 10 through the first switching element 12, the storage capacitor 22 is discharged in this case via the discharge resistor 26 and the diode 28 with a time constant T2, which is shorter than the time constant T1 for the charging of the storage capacitor 22 via the charging resistor 24 is. In this way, a deactivation of the door locking element 18 is already a very short time after switching on the motor controller 10 is no longer possible. After switching off the engine control 10, the door of the laundry drum can be deactivated only after a time T1 (> T).
  • FIG Fig. 3 A more detailed illustration of a drive circuit of the second embodiment described above is shown in FIG Fig. 3 shown.
  • the door lock element 18 locks automatically when closing the door 19 of the laundry drum and actuates a switch with a locking cam 18a.
  • the power supply L is then connected via this switch 18a as L 'to the power elements of the washing machine.
  • the motor controller 10 is turned on by the controller 14 via the switch 12a of the relay 12. In this state, ie when the motor and thus the laundry drum rotates, is at the collector of the transistor 16, a voltage of 0 V and the storage capacitor 22 is discharged via the discharge resistor 26 and the diode 28.
  • the door lock member 18 further includes a magnet 18b for magnetically activating the switch 18a.
  • the triac 20, which operates this magnet 18b, can be triggered with a signal from the controller via the transistor (second switching element of the invention) 30 with the energy from the storage capacitor 22.
  • the relay 12 drops out and its switch 12a opens the connection to the motor controller 10.
  • the voltage U is supplied by the power supply unit 32, guided via the relay winding of the relay 12.
  • the storage capacitor 22 now charges via the charging resistor 24 with the corresponding time constant T1.
  • the door 1 can be unlocked by the controller 14 via transistor 30, triac 20 and door locking element 18, wherein the transistor 30 takes the energy necessary to trigger the triac 20 the storage capacitor 22.
  • the motor controller 10 is re-applied by the controller 14 via the transistor 16 and the relay 12 with the switch 12a to the supply voltage, the transistor 16 discharges the storage capacitor 22 quickly via the discharge resistor 26 and the diode 28. An unlocking of the door 19 is then not possible anymore.

Landscapes

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

Claims (7)

  1. Appareil de traitement de linge qui présente:
    une commande de moteur (10) commandée par un premier élément de commande (12) qui lui-même est commandé par une commande (14) par l'intermédiaire d'un premier élément de commutation (16) et
    un élément (18) de verrouillage de porte qui est commandé par un deuxième élément de commande (20), l'élément (18) de verrouillage de porte pouvant être désactivé,
    caractérisé en ce que
    un condensateur d'accumulation (22) qui alimente en énergie le deuxième élément de commande (20) en vue d'une impulsion de commande, qui est chargé par le premier élément de commande (12) lorsque la première commande de moteur (10) est débranchée et qui est déchargé par l'intermédiaire du premier élément de commutation (16) lorsque la commande (10) de moteur est débranchée est prévu entre le premier et le deuxième élément de commande (12, 20).
  2. Appareil de traitement de linge selon la revendication 1, caractérisé en ce qu'une résistance de charge (24) est raccordée entre le condensateur d'accumulation (22) et le premier élément de commutation (16).
  3. Appareil de traitement de linge selon les revendications 1 ou 2, caractérisé en ce qu'un circuit série constitué d'une résistance de décharge (26) et d'une diode (28) est raccordé entre le condensateur d'accumulation (22) et le premier élément de commande (12).
  4. Appareil de traitement de linge selon l'une des revendications 1 à 3, caractérisé en ce que le deuxième élément de commande (20) est un triac que la commande (14) active avec l'énergie du condensateur d'accumulation (22) par l'intermédiaire d'un deuxième élément de commutation (30).
  5. Appareil de traitement de linge selon l'une des revendications 1 à 3, caractérisé en ce que le deuxième élément de commande (20) est un relais que la commande (14) active avec l'énergie du condensateur d'accumulation (22) par l'intermédiaire d'un deuxième élément de commutation (30).
  6. Appareil de traitement de linge selon l'une des revendications 1 à 5, caractérisé en ce que le premier élément de commande (12) et le premier élément de commutation (16) sont intégrés dans un module séparé.
  7. Appareil de traitement de linge selon l'une des revendications précédentes, caractérisé en ce que l'élément (18) de verrouillage de porte peut être désactivé par au moins deux impulsions de commande.
EP08002417A 2007-02-26 2008-02-09 Appareil de traitement du linge Not-in-force EP1962011B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007009637 2007-02-26
DE102007037767A DE102007037767A1 (de) 2007-02-26 2007-08-10 Gerät mit ansteuerbarer Schutzeinrichtung

Publications (2)

Publication Number Publication Date
EP1962011A1 EP1962011A1 (fr) 2008-08-27
EP1962011B1 true EP1962011B1 (fr) 2010-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002417A Not-in-force EP1962011B1 (fr) 2007-02-26 2008-02-09 Appareil de traitement du linge

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EP (1) EP1962011B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209113A1 (de) * 2014-05-14 2015-11-19 BSH Hausgeräte GmbH Verriegelungseinrichtung zum Verriegeln einer Tür eines Haushaltsgeräts, Haushaltsgerät und entsprechendes Verfahren
DE102014216556B4 (de) 2014-08-20 2023-02-09 BSH Hausgeräte GmbH Schaltungsanordnung zum Steuern einer elektrisch angetriebenen Verriegelungseinrichtung für eine Tür eines Haushaltsgeräts, Haushaltsgerät sowie Verfahren hierfür

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1139003A (en) * 1965-02-09 1969-01-08 Philips Nv Improvements in or relating to programmed washing machines
US3553488A (en) 1968-02-06 1971-01-05 Westinghouse Air Brake Co Fail-safe circuit arrangement
DE2163449A1 (de) * 1971-12-21 1973-07-05 Miele & Cie Tuerverriegelung fuer eine wasch- oder schleudermaschine
IT8236051U1 (it) 1982-10-04 1984-04-04 Texas Instruments Italia Spa Perfezionamento nei dispositivi di bloccaggio di sicurezza per sportelli di lavatrici e simili ad azionamento mediante bimetallo a riscaldamento voltmetrico
IT1267583B1 (it) 1994-09-13 1997-02-07 Zanussi Elettrodomestici Macchina lavabiancheria con dispositivi perfezionati di comando e controllo

Also Published As

Publication number Publication date
EP1962011A1 (fr) 2008-08-27

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