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EP0553645A1 - Steuerungsvorrichtung zum Schleudern in Waschmaschinen - Google Patents

Steuerungsvorrichtung zum Schleudern in Waschmaschinen Download PDF

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Publication number
EP0553645A1
EP0553645A1 EP93100428A EP93100428A EP0553645A1 EP 0553645 A1 EP0553645 A1 EP 0553645A1 EP 93100428 A EP93100428 A EP 93100428A EP 93100428 A EP93100428 A EP 93100428A EP 0553645 A1 EP0553645 A1 EP 0553645A1
Authority
EP
European Patent Office
Prior art keywords
drain pump
tub
clothes
electronic
washing
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
EP93100428A
Other languages
English (en)
French (fr)
Other versions
EP0553645B1 (de
Inventor
Giuseppe Frucco
Silvano Cimetta
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.)
Electrolux Zanussi Elettrodomestici SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Zanussi 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 Electrolux Zanussi Elettrodomestici SpA, Zanussi Elettrodomestici SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0553645A1 publication Critical patent/EP0553645A1/de
Application granted granted Critical
Publication of EP0553645B1 publication Critical patent/EP0553645B1/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 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F34/06—Timing arrangements

Definitions

  • the present invention relates to a control arrangement for the spin-extraction phase of a washing process in a clothes washing machine, in particular a clothes washing or a combined clothes washing and drying machine, adapted to provide an effective, optimized final spin-extraction action on the washload according to the quantity and the type of clothes in the washload.
  • Washing machines of the above cited type comprise a washing tub accomodating a rotating drum provided to hold the washload and capable of being rotatably driven by driving means of a traditional type in order to accomplish the assigned task of washing clothes through a sequence of subsequently performed washing and rinsing phases, as controlled by a cycle or sequence control device consisting of a programme control-timer switch of the electromechanical type, which may possibly be associated with an electronic microcontroller means.
  • Said rinsing phases are performed so as to be carried out within periods of time having a pre-determined duration, as controlled by the action of said programme control-timer switch and/or electronic microcontroller means, while pre-determined amounts of fresh water from the mains are each time delivered into the washing tub of the machine, under the control of such level control devices as a pressure switch of a more or less traditional type or, possibly, level sensors of a per sè known type that are built into the machine, for any amount and type whatsoever of clothes loaded in the drum, said drum being driven to first rotate alternately at the washing speed in either one of its directions of rotation and then, in the final phases of the rinsing process, at the spin-extraction speed in a single direction of rotation, whereas the drain pump of the machine is switched on, so that the washload is spin-dried and the extracted water collecting in the tub is at the same time discharged outside the machine.
  • level control devices as a pressure switch of a more or less traditional type or, possibly, level sensors of a per sè
  • This method of performing the rinsing process in its various phases, while actually enabling the clothes to be washed and rinsed in an essentially effective way within periods of time of a pre-determined duration regardless of the amount and the properties (especially the type of fabrics, which may absorb moisture to a more or less marked extent) of the clothes making up the washload, does not on the other hand enable the washing cycles to be optimized in terms of duration, as a consequence of said properties and amount of the washload being duly taken into account, so as it would on the contrary be desirable in view of adapting each time the duration of said process phases to the actual conditions of the washload.
  • the afore cited Figure is a schematical view of the control arrangement according to the present invention, which is built in a clothes washing machine, in particular a clothes washing or a combined clothes washing and drying machine, comprising a washing tub accomodating a rotating drum provided to hold the washload and capable of being rotatably driven by an electric motor (all these items not being shown in the Figure) in order to accomplish the assigned task of washing clothes through a sequence of subsequently performed washing and rinsing phases, as well as comprising a cycle control device consisting in an electronic microcontroller means 1 of a traditional type, which is adapted to be set in a per sè known way so as to control, in accordance with the type and the amount of the clothes that are each time introduced in the drum for being washed, the progress of the basically pre-set washing cycles.
  • the afore cited clothes washing machine further comprises at least a level control arrangement to control the filling level of the wash liquor or the rinse water in the tub.
  • This control arrangement may for instance consist of a pressure switch 2 or a similar type of level sensing device, which may be constituted by either an electromechanical pressure switch or an analog-output electronic pressure sensor of a traditional type.
  • Said machine also comprises a drain pump 3, which is connected to the lower portion of the washing tub and electrically linked to the microcontroller means 1, along with said pressure switch 2, said pump being adapted to discharge the wash liquor or the rinsing water outside said tub at the end of the corresponding phases of the laundering process.
  • said clothes washing machine also comprises at least an electronic counter means 4 and an electronic comparator means 5, or a similar element for comparing electric quantities, which are connected, along with the other electric components, in the electrical circuit of the machine in the way and to the purposes as described hereinafter.
  • the pressure switch 2 is selected with such ratings as to be able to measure very low pressures of the liquors in the tub (ie. in the range of 20 to 30 mm WC), while the pressure detection intake (not shown) of the same pressure switch is arranged in a position located outside the tub, in as low a location as possible.
  • said pressure switch can be noticed as being connected with the electronic counter means 4 through the electronic microcontroller means 1, the latter being set in such a way as to be able to generate an electric signal 9 capable of suppressing counting by the counter means 4 upon water reaching the highest filling level in the tub, as pre-determined by the setting of the same pressure switch ("full" level).
  • the drain pump 3 can in turn be noticed as being connected with said electronic counter means 4 through said electronic microcontroller means 1, while the latter is arranged so as to be able to generate a further electric signal 10 capable of enabling said counter means 4 to start counting upon said drain pump 3 being switched off by said electronic microcontroller means during the final wash load spin-extraction phase, in which all of the rinsing water filled into the tub is discharged outside the same tub.
  • the purpose of the electronic counter means 4 is to measure the time elapsing from the moment in which said drain pump 3 is de-energized by said electronic microcontroller means 1, up to the moment in which said highest water filling level, as pre-determined by the setting of the pressure switch 2, is reached, ie. a condition in which the liquor absorbed by the clothes is gradually extracted therefrom after spinning, thereby returning inside the tub.
  • This time measurement is applied to a first input 6 of said electronic comparator means 5 and is continuously compared with a pre-set, experimentally determined reference time T rif generated by said microcontroller means 1, and corresponding to the ultimate condition in which water has actually been extracted to an adequate extent from the various kinds or types of fabrics in the washload so that they are now returning just negligible amounts of liquor to the tub of the machine, so that the final washload spin-extraction phase can reasonably be considered as being practically completed, said reference reference time information being applied to the other input 7 of said comparator means.
  • said electronic comparator means 5 is connected through its output 8 with the microcontroller means 1, whereas two different levels of signal can occur at said output 8 of the comparator means 5, such as for instance a zero level and a pre-set level in accordance with the comparison of the time applied to the input 6 with the time applied to the input 7 of said comparator means.
  • the level of the signal occurring at the output 8 of said comparator means 5 is such as to cause the microcontroller means 1 to generate an electrical signal 11 that is arranged to switch on again the drain pump 3 of the washing machine through the control of the same microcontroller means, whereas in the case where said time measured by the counter means 4 is equal to or longer than the reference time T rif , under the corresponding operational conditions of the washing machine as previously illustrated, the other level of the signal occurring at the output 8 of said comparator means 5 is such as to cause said microcontroller means 1 to generate a further electrical signal 12 that is arranged to keep said drain pump 3 in its de-energized state and switch off the electric motor of the washing machine, thereby putting an end to the final washload spin-extraction phase of the washing process, under the control of said microcontroller means 1.
  • the microcontroller means 1 starts by being set to perform a pre-determined washing cycle according to the type and the quantity of the clothes to be laundered, whereas the progress of said washing cycle will be controlled automatically by said microcontroller means and is terminated in the usual way by a sequence of final spin-extraction phases aimed at extracting the rinsing water from the clothes.
  • said microcontroller means causes said drain pump 3 to be switched off after a pre-determined period of time, which is considered to be adequate to allow the largest possible amount of the water contained in the tub to be pumped outside.
  • the microcontroller means 1 is arranged to detect this operational condition of the same pump and, at the same time, to generate the afore cited electrical signal 10 enabling the function of said electronic counter means 4 which therefore starts counting the time elapsing from the moment at which the same drain pump is switched off. Said counter means then stops counting said time as soon as the microcontroller means 1 detects, through the corresponding signal 13, the state in which the "full" level of the pressure switch 2 is reached. The value of the time having in this way been counted is then applied to the first input 6 of the electronic comparator means 5 and compared with the reference time T rif that is applied to the second input 7 of the same comparator means.
  • the signal occurring at the output 8 of said comparator means emphasizes another pre-determined level causing the microcontroller means 1 to generate the electrical signal 12 that is arranged to keep the drain pump 3 in its de-energized condition, ie.
  • said electronic counter means 4 and said electronic comparator means 5 can be directly included in the structure of said microcontroller means 1.
  • the control arrangement for the spin-extraction phase of the washing process of a clothes washing machine does in this way enable the duration of the final spin-extraction phase to be each time adapted automatically to both the actual characteristics of the different types of clothes and the actual amount of clothes in the washload, and therefore to the actual water adsorbing capacity of the same washload, while ensuring effective water extraction from the clothes and optimizing the way in which the whole washing process is ultimately performed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP93100428A 1992-01-28 1993-01-14 Steuerungsvorrichtung zum Schleudern in Waschmaschinen Expired - Lifetime EP0553645B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN920006A IT1259201B (it) 1992-01-28 1992-01-28 Dispositivo di controllo della fase di centrifugazione per macchina lavatrice di biancheria
ITPN920006 1992-01-28

Publications (2)

Publication Number Publication Date
EP0553645A1 true EP0553645A1 (de) 1993-08-04
EP0553645B1 EP0553645B1 (de) 1996-01-10

Family

ID=11394615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100428A Expired - Lifetime EP0553645B1 (de) 1992-01-28 1993-01-14 Steuerungsvorrichtung zum Schleudern in Waschmaschinen

Country Status (4)

Country Link
EP (1) EP0553645B1 (de)
DE (1) DE69301247T2 (de)
ES (1) ES2085057T3 (de)
IT (1) IT1259201B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0711860A1 (de) * 1994-11-08 1996-05-15 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Schleudergang in einer Wäschewaschmaschine
US6609264B2 (en) 2001-09-21 2003-08-26 Maytag Corporation Pump cycling control system for a washing machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512852A1 (fr) * 1981-09-14 1983-03-18 Philips Nv Machine a laver
GB2168388A (en) * 1984-12-15 1986-06-18 Licentia Gmbh Program control apparatus for a washing machine
US4662193A (en) * 1984-05-18 1987-05-05 Sanyo Electric Co., Ltd. Washing machine
DE4012115A1 (de) * 1990-04-14 1991-10-17 Licentia Gmbh Verfahren zum schleudern von waesche in einer programmgesteuerten haushaltsmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512852A1 (fr) * 1981-09-14 1983-03-18 Philips Nv Machine a laver
US4662193A (en) * 1984-05-18 1987-05-05 Sanyo Electric Co., Ltd. Washing machine
GB2168388A (en) * 1984-12-15 1986-06-18 Licentia Gmbh Program control apparatus for a washing machine
DE4012115A1 (de) * 1990-04-14 1991-10-17 Licentia Gmbh Verfahren zum schleudern von waesche in einer programmgesteuerten haushaltsmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0711860A1 (de) * 1994-11-08 1996-05-15 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Schleudergang in einer Wäschewaschmaschine
US6609264B2 (en) 2001-09-21 2003-08-26 Maytag Corporation Pump cycling control system for a washing machine

Also Published As

Publication number Publication date
DE69301247D1 (de) 1996-02-22
ES2085057T3 (es) 1996-05-16
IT1259201B (it) 1996-03-11
ITPN920006A0 (it) 1992-01-28
ITPN920006A1 (it) 1993-07-28
EP0553645B1 (de) 1996-01-10
DE69301247T2 (de) 1996-08-22

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