EP0345120A1 - Waschmaschine oder Trockner mit automatischer Messung des Gewichts der Wäsche - Google Patents

Waschmaschine oder Trockner mit automatischer Messung des Gewichts der Wäsche Download PDF

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Publication number
EP0345120A1
EP0345120A1 EP89401403A EP89401403A EP0345120A1 EP 0345120 A1 EP0345120 A1 EP 0345120A1 EP 89401403 A EP89401403 A EP 89401403A EP 89401403 A EP89401403 A EP 89401403A EP 0345120 A1 EP0345120 A1 EP 0345120A1
Authority
EP
European Patent Office
Prior art keywords
drum
acceleration
motor
washing machine
speed
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
EP89401403A
Other languages
English (en)
French (fr)
Other versions
EP0345120B1 (de
Inventor
Jean-Luc Roux
Bernard Delhomme
François Garofalo
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
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 FR8807216A external-priority patent/FR2631988B1/fr
Application filed by Compagnie Industrielle dAppareils Menagers SA CIAPEM filed Critical Compagnie Industrielle dAppareils Menagers SA CIAPEM
Priority to AT89401403T priority Critical patent/ATE85370T1/de
Publication of EP0345120A1 publication Critical patent/EP0345120A1/de
Application granted granted Critical
Publication of EP0345120B1 publication Critical patent/EP0345120B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • 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
    • D06F34/18—Condition of the laundry, e.g. nature or weight

Definitions

  • the invention relates to a washing machine or dryer type laundry rotating drum which comprises means for automatically detecting the load of laundry introduced into the drum.
  • a household washing machine usually has a rotating drum in which the laundry is placed. This drum is perforated and is placed in a tank receiving the water or the mixture of water and detergent. The mixing of the linen is obtained for example by means of projections inside the drum.
  • the volume of water introduced into the machine the quantity of detergent and other parameters, such as the durations of the various phases of operation of the washing machine: prewash, wash, rinse, spin, depend of the load of laundry introduced into the machine.
  • the invention relates to an improvement in the washing machine described in this European patent 84 402090. It allows a more precise measurement. It also makes it possible, in one embodiment, to simplify the manufacture of the washing machine, in particular by doing without means for measuring the intensity of the electric current passing through the drive motor of the drum.
  • the washing machine or dryer comprises, for determining the load of laundry in the drum, a means of measuring the moment of inertia of the laundry with respect to the axis of rotation of this drum, this measurement being obtained by rotating the drum at constant acceleration. It is characterized in that the drum is rotated successively according to two different values of constant acceleration, and in that the moment of inertia is determined from a difference between, on the one hand, a measurement carried out during of the first acceleration, and on the other hand, a measurement carried out during the second acceleration.
  • the value 6 of the phase angle of a control with phase control of the speed of the drum is used, without involving the intensity of the electric current passing through the motor.
  • the moment of inertia is determined from a difference between a measurement of the intensity of the electric current passing through the motor produced during the first acceleration and a measurement of this intensity passing through the motor during the second acceleration .
  • the invention relates to a washing machine or dryer, characterized in that the universal drum drive motor being supplied with alternating current and its speed being determined by a phase control command by to a processor, in particular a microprocessor, this processor determines the moment of inertia from the value of the phase angle.
  • the washing machine (not shown as a whole) is of the domestic type with a washing drum with a perforated cylindrical wall rotating around a horizontal axis inside a tank.
  • the electric motor 10 (FIG. 1) for driving the drum is of the universal type. It is supplied with alternating current 11, for example at the frequency of 50 Hz from the network, by means of a controlled switch 12 such as a triac.
  • a microprocessor 13 is provided, connected to the triac control electrode 12 via an interface circuit 14.
  • the microprocessor 13 imposes on the motor 10 a set speed dependent on a program prerecorded in its memory. This microprocessor also constitutes the comparator for speed regulation. To this end, it has an input 13 to which the output signal of a tachometer generator 15 driven by the motor 10 is applied.
  • the microprocessor 13 controls the angle 8 (FIG. 2) of opening of the triac 12 at each alternation of the alternating signal 11, that is to say the duration during which this switch 12 is conductive during each period of this signal 11.
  • the opening angle 8 has been shown on the abscissa and the signal on the ordinate alternating 11.
  • the triac is open, that is to say nonconductive, between the angles 0 and 6 and conductor between angles 6 and n.
  • the microprocessor 13 which supplies the triac 12 closing control pulse.
  • this phase angle ⁇ which is determined by the microprocessor 13, is used for the measurement of the moment of inertia L of laundry in the drum, i.e. for the measurement of the laundry load.
  • C is the engine torque
  • L the moment of inertia of the laundry with respect to the axis of the drum
  • J the moment of inertia of the drum with respect to its axis of rotation
  • d ⁇ / dt the acceleration ( or decelaration) of the rotation of the drum
  • C R the resistant torque opposed by the drum.
  • the motor torque is proportional to the intensity of the electric current flowing through it, that is to say:
  • K is a constant specific to the motor and 1 the intensity of the electric current flowing through it.
  • the microprocessor periodically determines, every twenty milliseconds (that is to say at the frequency of 50 Hz) in the example, the value of the angle 8 1 for controlling the triac 12 and this angle is stored; the microprocessor also determines the sum, noted ⁇ 1 , of all these angles 6 1 .
  • the value of the phase control angle ⁇ 2 of the triac 12 is determined every 80 milliseconds (four times twenty milliseconds) and, as for the first ramp, the sum ⁇ 2 of all these angles that we put in memory.
  • the sampling period is the same during the second ramp, that is to say that in the example the number of samples is four times greater for the second ramp than for the first.
  • the microprocessor calculates the quantity D such that:
  • the sampling period during the second ramp must be ⁇ times greater than during the first ramp, ⁇ being the ratio between the first and second acceleration. If the sampling period is the same for the two ramps, it will then be necessary to assign to the sum of the angles 8 for the second ramp a division factor equal to this same ratio ⁇ between the first and the second acceleration.
  • the washing machine according to the invention is of a particularly simple embodiment since it does not require any particular means of measuring the intensity of the electric current passing through the motor 10.
  • the indication of load of linen is more precise than with the provisions described in said European patent mentioned above because the calculation carried out makes it possible to eliminate the factor C R in all rigor. It is of course not essential that the second ramp 21 immediately follow the first ramp 20 as shown in Figure 3; it is possible to separate the end of the first ramp from the start of the second ramp.
  • FIGS. 4 and 5 another embodiment of the invention which also allows a more precise measurement of the laundry load thanks to the elimination of the factor C R. He distinguishes himself of the embodiment previously described by the fact that the measurement involves the intensity of the electric current passing through the motor instead of the phase angle.
  • ⁇ is calculated from ⁇ .
  • the calculation is carried out in the example using a microprocessor.
  • the drum drive motor Before introducing water into the machine, the drum drive motor is rotated at a speed V corresponding for example to 200 revolutions / minute for the drum, then from time t 1 (FIG. 4) this constant acceleration speed is increased to a speed V 2 , for example corresponding to a rotation speed of around 400 revolutions / minute for the drum.
  • the duration of this ramp up is A ti, between the instants ti and t 2 , that is to say approximately 4 seconds in the example.
  • the intensity I of the current passing through the motor and these intensities are stored in memory.
  • the microprocessor also determines the sum, denoted 1 1 , of all these intensities li.
  • the intensity 1 2 of the current passing through the motor is determined every 80 milliseconds (four times twenty milliseconds) and, as for the first ramp, the sum E 1 2 of all these intensities that we put in memory.
  • the sampling period is the same during the second ramp, that is to say that in the example the number of samples is four times greater for the second ramp than for the first.
  • the microprocessor calculates the quantity D such that:
  • the sampling period during the second ramp must be posted times greater than during the first ramp, ⁇ being the ratio between the first and second acceleration. If the sampling period is the same for the two ramps then it will be necessary to assign to the sum of the intensities 1 for the second ramp a division factor equal to this same ratio between the first and the second acceleration.
  • the formula (27) above shows that it is not essential to carry out a sum of samples during each ramp. It suffices to measure the intensity of the current for a speed V i determined during the first ramp, to measure the intensity of the current during the second ramp for the same speed Vi and to make the difference between these two intensities to obtain a quantity proportional to L + J.
  • the laundry load can be determined not only before any water is introduced into the washing machine, but also at other times during the operation of the machine.
  • the invention also applies to a dryer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP89401403A 1988-05-31 1989-05-23 Waschmaschine oder Trockner mit automatischer Messung des Gewichts der Wäsche Expired - Lifetime EP0345120B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401403T ATE85370T1 (de) 1988-05-31 1989-05-23 Waschmaschine oder trockner mit automatischer messung des gewichts der waesche.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8807216A FR2631988B1 (fr) 1988-05-31 1988-05-31 Perfectionnements a un lave-linge ou seche-linge a determination automatique de la charge de linge introduite dans la machine
FR8807216 1988-05-31
FR888811908A FR2636354B2 (fr) 1988-05-31 1988-09-13 Perfectionnements a un lave-linge ou seche-linge a determination automatique de la charge de linge introduite dans la machine
FR8811908 1988-09-13

Publications (2)

Publication Number Publication Date
EP0345120A1 true EP0345120A1 (de) 1989-12-06
EP0345120B1 EP0345120B1 (de) 1993-02-03

Family

ID=26226688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401403A Expired - Lifetime EP0345120B1 (de) 1988-05-31 1989-05-23 Waschmaschine oder Trockner mit automatischer Messung des Gewichts der Wäsche

Country Status (3)

Country Link
EP (1) EP0345120B1 (de)
DE (1) DE68904699T2 (de)
FR (1) FR2636354B2 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161393A (en) * 1991-06-28 1992-11-10 General Electric Company Electronic washer control including automatic load size determination, fabric blend determination and adjustable washer means
US5208931A (en) * 1989-08-30 1993-05-11 Fisher & Paykel Limited Laudry machines and/or methods of controlling the same
US5271116A (en) * 1989-08-30 1993-12-21 Fisher & Paykel Limited Laundry machines and/or methods of controlling the same
US5325677A (en) * 1992-08-27 1994-07-05 General Electric Company Electronic washer control including automatic balance, spin and brake operations
EP0649930A1 (de) * 1993-10-25 1995-04-26 Bosch-Siemens HausgerÀ¤te GmbH Verfahren zum Bestimmen der Wäschemenge in einer Wäschebehandlungsmaschine
US5507054A (en) * 1993-10-25 1996-04-16 Bosch-Siemens Hausgeraete Gmbh Method for determining the mass of wet laundry in a laundry drum
US5519835A (en) * 1990-12-20 1996-05-21 Fujitsu Limited Method and apparatus for controlling the flow of data transmissions by generating a succession of ready signals to a high-performance parallel interface(HIPPI) terminal connected to a broadband integrated services digital network (B-ISDN)
WO1996029457A1 (en) * 1995-03-20 1996-09-26 General Electric Company Energy efficient washer with inertia based method for determining load
GB2327502A (en) * 1997-07-14 1999-01-27 Lg Electronics Inc Determining the amount of laundry present in a drum washing machine
US6038724A (en) * 1998-11-27 2000-03-21 General Electric Company Clothes load estimation method and washing machine
US6122840A (en) * 1998-11-18 2000-09-26 General Electric Company Systems and methods for determining drying time for a clothes dryer
EP1512785A1 (de) * 2003-09-04 2005-03-09 Lg Electronics Inc. Verfahren zur Erfassung der Wäschemenge einer Waschmaschine
EP2221412A1 (de) * 2009-02-24 2010-08-25 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Überwachen einer Beladung einer Wäschetrommel und/oder eines Trocknungsgrades von Wäschestücken und entsprechende Schaltungsanordnung
US20110023602A1 (en) * 2008-03-31 2011-02-03 Electrolux Home Products Corporation N.V. Method for Estimating the Moment of Inertia of the Rotating Unit of a Washing Machine, and Washing Machine Implementing Said Method
US20140096327A1 (en) * 2012-10-09 2014-04-10 Lg Electronics Inc. Laundry treatment machine and method of operating the same
EA021502B1 (ru) * 2009-06-17 2015-07-30 Грандимпьянти Иле Али С.П.А. Способ определения массы белья внутри стиральной машины барабанного типа
US9945060B2 (en) 2012-01-19 2018-04-17 Whirlpool Corporation Method to determine fabric type in a laundry treating appliance using motor current signature during agitation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20100377A1 (it) * 2010-06-14 2011-12-15 Askoll Holding Srl Metodo di misurazione del momento dâ¬"inerzia di un cestello di una macchina lavatrice e macchina lavatrice predisposta per lâ¬"implementazione di detto metodo
US9080277B2 (en) 2011-12-22 2015-07-14 Whirlpool Corporation Apparatus and method for determining inertia of a laundry load
US9091012B2 (en) 2011-12-22 2015-07-28 Whirlpool Corporation Method and apparatus for determining an inertia of a laundry load in a laundry treating appliance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235085A (en) * 1978-04-04 1980-11-25 Tokyo Shibaura Denki Kabushiki Kaisha Automatic washer
GB2063927A (en) * 1979-11-26 1981-06-10 Tokyo Shibaura Electric Co Automatic washer
EP0143685A1 (de) * 1983-10-25 1985-06-05 Esswein S.A. Verfahren zum Ermitteln der Wäschemenge in einer drehenden Trommel und Waschmaschine und/oder Wäschetrockner zur Durchführung dieses Verfahrens
EP0159202A1 (de) * 1984-02-17 1985-10-23 Esswein S.A. Waschmaschine mit automatischer Ermittlung von Belastung und Wäscheart
GB2202332A (en) * 1987-03-14 1988-09-21 Toshiba Kk Washing weight detection and washing operation control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235085A (en) * 1978-04-04 1980-11-25 Tokyo Shibaura Denki Kabushiki Kaisha Automatic washer
GB2063927A (en) * 1979-11-26 1981-06-10 Tokyo Shibaura Electric Co Automatic washer
EP0143685A1 (de) * 1983-10-25 1985-06-05 Esswein S.A. Verfahren zum Ermitteln der Wäschemenge in einer drehenden Trommel und Waschmaschine und/oder Wäschetrockner zur Durchführung dieses Verfahrens
EP0159202A1 (de) * 1984-02-17 1985-10-23 Esswein S.A. Waschmaschine mit automatischer Ermittlung von Belastung und Wäscheart
GB2202332A (en) * 1987-03-14 1988-09-21 Toshiba Kk Washing weight detection and washing operation control system

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208931A (en) * 1989-08-30 1993-05-11 Fisher & Paykel Limited Laudry machines and/or methods of controlling the same
US5271116A (en) * 1989-08-30 1993-12-21 Fisher & Paykel Limited Laundry machines and/or methods of controlling the same
US5519835A (en) * 1990-12-20 1996-05-21 Fujitsu Limited Method and apparatus for controlling the flow of data transmissions by generating a succession of ready signals to a high-performance parallel interface(HIPPI) terminal connected to a broadband integrated services digital network (B-ISDN)
US5710942A (en) * 1990-12-20 1998-01-20 Fujitsu Limited Adapter monitoring storage capacity of its buffer and sequentially generating ready signals to notify a terminal to transfer more burst data to the buffer
US5161393A (en) * 1991-06-28 1992-11-10 General Electric Company Electronic washer control including automatic load size determination, fabric blend determination and adjustable washer means
US5325677A (en) * 1992-08-27 1994-07-05 General Electric Company Electronic washer control including automatic balance, spin and brake operations
US5507054A (en) * 1993-10-25 1996-04-16 Bosch-Siemens Hausgeraete Gmbh Method for determining the mass of wet laundry in a laundry drum
EP0649930A1 (de) * 1993-10-25 1995-04-26 Bosch-Siemens HausgerÀ¤te GmbH Verfahren zum Bestimmen der Wäschemenge in einer Wäschebehandlungsmaschine
CN1079461C (zh) * 1993-10-25 2002-02-20 Bsh博施及西门子家用器具有限公司 洗涤物处理机中洗涤量的确定方法
CN1070953C (zh) * 1993-10-25 2001-09-12 Bsh博施及西门子家用器具有限公司 确定洗涤滚筒中的湿洗涤物质量的方法
WO1996029457A1 (en) * 1995-03-20 1996-09-26 General Electric Company Energy efficient washer with inertia based method for determining load
GB2327502A (en) * 1997-07-14 1999-01-27 Lg Electronics Inc Determining the amount of laundry present in a drum washing machine
GB2327502B (en) * 1997-07-14 2001-10-17 Lg Electronics Inc Method for detecting clothing amount in drum washing machine
US6122840A (en) * 1998-11-18 2000-09-26 General Electric Company Systems and methods for determining drying time for a clothes dryer
US6038724A (en) * 1998-11-27 2000-03-21 General Electric Company Clothes load estimation method and washing machine
EP1512785A1 (de) * 2003-09-04 2005-03-09 Lg Electronics Inc. Verfahren zur Erfassung der Wäschemenge einer Waschmaschine
US20110023602A1 (en) * 2008-03-31 2011-02-03 Electrolux Home Products Corporation N.V. Method for Estimating the Moment of Inertia of the Rotating Unit of a Washing Machine, and Washing Machine Implementing Said Method
US8336378B2 (en) * 2008-03-31 2012-12-25 Electrolux Home Products Corporation N.V. Method for estimating the moment of inertia of the rotating unit of a washing machine, and washing machine implementing said method
EP2221412A1 (de) * 2009-02-24 2010-08-25 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Überwachen einer Beladung einer Wäschetrommel und/oder eines Trocknungsgrades von Wäschestücken und entsprechende Schaltungsanordnung
EA021502B1 (ru) * 2009-06-17 2015-07-30 Грандимпьянти Иле Али С.П.А. Способ определения массы белья внутри стиральной машины барабанного типа
US9945060B2 (en) 2012-01-19 2018-04-17 Whirlpool Corporation Method to determine fabric type in a laundry treating appliance using motor current signature during agitation
US20140096327A1 (en) * 2012-10-09 2014-04-10 Lg Electronics Inc. Laundry treatment machine and method of operating the same
US9809923B2 (en) * 2012-10-09 2017-11-07 Lg Electronics Inc. Laundry treatment machine and method of operating the same

Also Published As

Publication number Publication date
DE68904699T2 (de) 1993-05-27
FR2636354B2 (fr) 1991-07-05
FR2636354A2 (fr) 1990-03-16
EP0345120B1 (de) 1993-02-03
DE68904699D1 (de) 1993-03-18

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