EP0447929A2 - Système de sécurité pour machines à laver - Google Patents

Système de sécurité pour machines à laver Download PDF

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Publication number
EP0447929A2
EP0447929A2 EP91103782A EP91103782A EP0447929A2 EP 0447929 A2 EP0447929 A2 EP 0447929A2 EP 91103782 A EP91103782 A EP 91103782A EP 91103782 A EP91103782 A EP 91103782A EP 0447929 A2 EP0447929 A2 EP 0447929A2
Authority
EP
European Patent Office
Prior art keywords
security system
fact
door
motor
motors
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.)
Withdrawn
Application number
EP91103782A
Other languages
German (de)
English (en)
Other versions
EP0447929A3 (en
Inventor
Flavio Lucarelli
Mauro Possanza
Giancarlo Zanchetta
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.)
ICE INDUSTRIA COMPONENTI ELETTROMECCANICI ED ELETTRONICI Srl
Whirlpool EMEA SpA
Original Assignee
ICE INDUSTRIA COMPONENTI ELETTROMECCANICI ED ELETTRONICI Srl
Merloni Elettrodomestici SpA
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 ICE INDUSTRIA COMPONENTI ELETTROMECCANICI ED ELETTRONICI Srl, Merloni Elettrodomestici SpA filed Critical ICE INDUSTRIA COMPONENTI ELETTROMECCANICI ED ELETTRONICI Srl
Publication of EP0447929A2 publication Critical patent/EP0447929A2/fr
Publication of EP0447929A3 publication Critical patent/EP0447929A3/en
Withdrawn legal-status Critical Current

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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
    • 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
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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
    • D06F2105/44—Opening, closing or locking of doors

Definitions

  • the present invention relates to a security system for washing and drying-machines of the type comprising an electric motor, an electric control module, a revolving basket and a door.
  • washing machines must be realised in such a way that the door cannot be opened by the user whilst functioning.
  • the opening of the door is prevented for the duration of time in which the machine is being used and for a given amount of time, usually for several minutes, after the machine has terminated its wash cycle or been switched off.
  • danger may arise in the case of a disfunction regarding the electric control module of the motor speed during the drying phase, when it is possible to open the door.
  • the motor will start to rotate at a high speed and so will the basket which is in liaison with the motor by a belt and pully.
  • washing-drying machines that present an electronic speed control module
  • the object of the present invention is that of providing a remedy concerning the described inconveniences and to indicate a security system for washing-drying machines that permit the opening of the door during the drying phase without placing the user at risk, realised in a simple and economic way.
  • the present invention has as its object a security system for washing-drying machines of the type comprising an electric motor, an electronic control module, a revolving basket and a door, characterised by the fact that, first means apt to verify the motors rotation speed and to control second means for blocking the opening of the door are provided for when the motors rotation speed exceeds a predetermined value.
  • a comparator block is referred to by the number 1, a switch by the number 2, realised by means of a triac 15, the number 4 refers to an electric control module of the motors speed, number 3 refers to a thermo resistive element of the type PTC that serves in blocking the door and number 5 refers to an intergrated circuit that accomplishes a great part of the motors functioning controls, available on the markets under TDA 1085.
  • the comparator block 1 that has the function of a threshold comparator, composed of six resistences, indicated by the numbers 6, 7, 8, 9, 10, and 12, and of two transistors indicated by the numbers 13 and 14.
  • the washing-drying machine comprises a tachymetric dynamo T (fig.2) mounted on the motor M (fig.2) that, by a belt actuates the basket (for simplicity reasons these two elements are not represented in the drawings).
  • the dynamo T When the motor runs, the dynamo T generates a voltage, proportional to the number of revolutions carried out by the motor M, that is sent to the intergrated circuit 5.
  • Said voltage is elaborated on the inside of the integrated circuit 5 by means of the comparison with a voltage of reference, achieved in the known way, relative to the number of revolutions that the motor must carry out.
  • the result of such comparison generates a signal utilised for controlling the conduction of the triac 16 and as a consequence to bring the number of revolutions of the motor to the desired value.
  • the voltage generated by the dynamo T is therefore compared to the voltage of reference, corrisponding to the value of revolutions of the motor programed for a given functioning cycle.
  • the motor speed is controlled by a locked loop control circuit.
  • a signal co-related to the rotation speed assumed by the motor M is sent in the present realisation also to the comparator 1.
  • Said comparator 1 has been projected to provide a command signal to the switch 2 in function of the speed assumed by the motor M in the drying phase.
  • the potential voltage divider 11, constituted in this case by the resistences 8 and 9, generates a threshold value that defines the maximum speed that the motor M can have during the drying phase along the lines of normal functioning.
  • the intergrated circuit 5 sends a voltage present at the pin P4 to the comparatore 1, that is representative of the tension generated by the tachymetric dynamo T.
  • the comparator 1 detects the difference between the tension coming from the intergrated circuit 5 and the threshold value given by the voltage divider 11. If the signal coming from the intergrated circuit 5 exceeds the threshold value, this means that there is an abnormal functioning of the machine.
  • the transistor 14 When the tension provided by the voltage divider 11 at the base of the transistor 14 is such that it exceeds the prefixed threshold value, the transistor 14 changes state and becomes a conductor letting pass a current, provided to conduct the triac 15 that, supplying the PTC 3, provides to block the door by means of a door block of the type known.
  • An analogous functioning occures in the absence of faliures of the triac 16 of the electronic module during the wash spin phase, that is when the motor speed exceeds that expected for the drying.
  • the comparator 1 is composed of six resistences, indicated by the numbers 17, 18, 19, 20, 21 and 22, and by two transistors 23 and 24 in common emitter configuration.
  • the potential voltage divider 11 is constituted by the resistences 17 and 18 and can be found before the transistors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP19910103782 1990-03-19 1991-03-13 Security system for washing machines Withdrawn EP0447929A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6719890 1990-03-19
IT67198A IT1241198B (it) 1990-03-19 1990-03-19 Sistema di sicurezza per macchine lavatrici

Publications (2)

Publication Number Publication Date
EP0447929A2 true EP0447929A2 (fr) 1991-09-25
EP0447929A3 EP0447929A3 (en) 1992-04-22

Family

ID=11300416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910103782 Withdrawn EP0447929A3 (en) 1990-03-19 1991-03-13 Security system for washing machines

Country Status (2)

Country Link
EP (1) EP0447929A3 (fr)
IT (1) IT1241198B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007065797A1 (fr) * 2005-12-09 2007-06-14 BSH Bosch und Siemens Hausgeräte GmbH Circuit de verrouillage et/ou de deverrouillage d'une serrure de porte, notamment d'un appareil electromenager
DE102007019102A1 (de) * 2007-04-23 2008-10-30 Diehl Ako Stiftung & Co. Kg Steuervorrichtung und Steuerverfahren für ein elektrisches Haushaltsgerät
WO2012025373A1 (fr) * 2010-08-24 2012-03-01 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour faire passer un dispositif d'un appareil électroménager dans un état de fonctionnement sûr, circuit pour faire fonctionner un appareil électroménager et appareil électroménager

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163449A1 (de) * 1971-12-21 1973-07-05 Miele & Cie Tuerverriegelung fuer eine wasch- oder schleudermaschine
DE3003895A1 (de) * 1979-02-05 1980-08-14 Turnright Controls Steueranordnung fuer eine waschmaschine
DE8805157U1 (de) * 1988-04-19 1988-12-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschinen-Türverriegelung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2163449A1 (de) * 1971-12-21 1973-07-05 Miele & Cie Tuerverriegelung fuer eine wasch- oder schleudermaschine
DE3003895A1 (de) * 1979-02-05 1980-08-14 Turnright Controls Steueranordnung fuer eine waschmaschine
DE8805157U1 (de) * 1988-04-19 1988-12-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschinen-Türverriegelung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007065797A1 (fr) * 2005-12-09 2007-06-14 BSH Bosch und Siemens Hausgeräte GmbH Circuit de verrouillage et/ou de deverrouillage d'une serrure de porte, notamment d'un appareil electromenager
US7973431B2 (en) 2005-12-09 2011-07-05 Bsh Bosch Und Siemens Hausgeraete Gmbh Circuit arrangement for locking and/or unlocking a door lock, especially in an electric appliance
DE102007019102A1 (de) * 2007-04-23 2008-10-30 Diehl Ako Stiftung & Co. Kg Steuervorrichtung und Steuerverfahren für ein elektrisches Haushaltsgerät
DE102007019102B4 (de) * 2007-04-23 2009-01-22 Diehl Ako Stiftung & Co. Kg Steuervorrichtung und Steuerverfahren für ein elektrisches Haushaltsgerät
US8286287B2 (en) 2007-04-23 2012-10-16 Diehl Ako Stiftung & Co. Kg Control apparatus and control method for an electrical domestic applicance
WO2012025373A1 (fr) * 2010-08-24 2012-03-01 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour faire passer un dispositif d'un appareil électroménager dans un état de fonctionnement sûr, circuit pour faire fonctionner un appareil électroménager et appareil électroménager

Also Published As

Publication number Publication date
EP0447929A3 (en) 1992-04-22
IT1241198B (it) 1993-12-29
IT9067198A0 (it) 1990-03-19
IT9067198A1 (it) 1991-09-19

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