EP0159204B1 - Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour - Google Patents

Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour Download PDF

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Publication number
EP0159204B1
EP0159204B1 EP85400161A EP85400161A EP0159204B1 EP 0159204 B1 EP0159204 B1 EP 0159204B1 EP 85400161 A EP85400161 A EP 85400161A EP 85400161 A EP85400161 A EP 85400161A EP 0159204 B1 EP0159204 B1 EP 0159204B1
Authority
EP
European Patent Office
Prior art keywords
drum
rotation
speed
water
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.)
Expired - Lifetime
Application number
EP85400161A
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German (de)
English (en)
French (fr)
Other versions
EP0159204A1 (fr
Inventor
Laurent Didier
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.)
Esswein SA
Original Assignee
Esswein SA
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Filing date
Publication date
Application filed by Esswein SA filed Critical Esswein SA
Priority to AT85400161T priority Critical patent/ATE70574T1/de
Publication of EP0159204A1 publication Critical patent/EP0159204A1/fr
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Publication of EP0159204B1 publication Critical patent/EP0159204B1/fr
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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the invention relates to a washing machine with drum rotating in a tank, of the domestic type, in which the pieces of linen are introduced into the drum before any command to introduce water into the tank.
  • the cost of washing depends, in particular, on the quantity of water used for washing and rinsing due, on the one hand, to the price of the water itself and, on the other hand, to the fact that the quantity of energy required to heat the water is proportional to the volume of water. It is therefore beneficial to reduce this volume of water to a minimum.
  • the invention achieves this result.
  • means are provided for maintaining the level of water in the tank at said height above the bottom of the drum by opening a water intake solenoid valve when the level of the latter has dropped into the tank.
  • the invention provides, according to a second of its aspects, which can be used independently of the first, a washing machine characterized by the characteristics of the claim 7.
  • the wetting process can be explained as follows: the water level being low, the quantity of water introduced during the first phase is insufficient to properly wet the laundry even if it absorbs all the water which is above the bottom of the drum. In addition, this absorbed water is not evenly distributed in the laundry; some parts may even stay completely dry.
  • the mixing by slow rotation of the drum distributes the laundry almost randomly. Under these conditions when the drum rotates at centrifugation or spin speed, some dry pieces of laundry are further from the axis of the drum than other wet pieces; it follows that during centrifugation the water expressed from the wet laundry reaches the dry laundry, which wets the latter. It is thus understood that a limited number of spins is sufficient to completely wet the laundry.
  • FIG. 1 and 2 There is shown very schematically in Figures 1 and 2 a washing machine which comprises a tank 10 inside which rotates a cylindrical drum 12 of horizontal axis 20 delimited by vertical walls 14 ( Figure 3).
  • the washing or rinsing water is introduced into the tank through a solenoid valve 16.
  • This washing machine is of the usual domestic type, that is to say that it conventionally includes a programmer so that its operation is fully automatic and various safety devices such as that which completely interrupts operation when the cover is open.
  • the cylindrical wall 13 of the drum 12 is perforated to allow the water 15 from the tank enters the drum and can thus impregnating cloth 14 introduced into the drum.
  • the operation of the machine is not intended to start in principle only after introduction of all the pieces of laundry into the drum. Moreover, this operation, and in particular the arrival of water, cannot intervene during the introduction of the linen because, for this operation, the cover of the machine is necessarily open.
  • the free surface 40 of the water in the tank 10 is at a low height h, for example of the order of 1.5 cm, above the bottom 30 of the drum, the diameter of which is approximately 44.5 cm in the example.
  • the solenoid valve 16 is closed automatically when this free surface has reached this predetermined level.
  • a vertical wall 11 of the tank 10 has an opening 31 (FIG. 3) whose axis is practically at said predetermined level, at height h above the bottom 30 of the drum.
  • This opening is traversed by a bowl 33, of generally cylindrical shape, made for example of plastic material, the opening 41 of which is in the tank and the bottom 34 of which is outside this tank.
  • the seal between the outer surface of the bowl 33 and the edges of the opening 31 is ensured by a seal 32 covering the two faces of the vertical wall 11 in the vicinity of the edges of the opening 31 as well as the edges of this opening and the outer surface of the bowl.
  • This bowl 33 contains, in the vicinity of the bottom 34, a cylindrical sleeve 35 with a horizontal axis parallel to the wall 11 and forming an intersection with the axis of said bowl; this sleeve connects to sealing two diametrically opposite openings 36 and 37 of the wall of the bowl (FIG. 4).
  • the sleeve 35 contains a thermistor 38 supplied with electric current by a voltage source (not shown) of sufficient value for this thermistor to be heated by the Joule effect.
  • the sleeve 35 is established in one piece by molding with the rest of the bowl 33.
  • the thickness of the sleeve 35 is however less than that of the wall of the bowl to allow good thermal contact between, on the one hand, the water which bathes part of the external surface of the sleeve 35 and, on the other hand, the thermistor 38 at l inside the sleeve, where water does not penetrate.
  • the thermistor 38 When the water comes into contact with the sleeve 35 it cools its wall and therefore the thermistor 38. Under these conditions the electrical resistance of this thermistor varies. This resistance variation is used to supply the solenoid valve 16 with a control signal to stop filling.
  • this speed of rotation is lower than the speed of rotation used for stirring the laundry for washing or rinsing.
  • the speed of rotation of the drum for wetting is of the order of 30 revolutions per minute while the speed of rotation of the drum for washing or rinsing is of the order of 50 revolutions per minute.
  • centrifugation is carried out for a time of the order of 30 seconds.
  • the solenoid valve 16 is then opened again to complete the level up to said height h and the drum is then rotated at the speed V1 of about 30 revolutions per minute.
  • a new rotation cycle at low speed V1 and then at centrifugation speed Vation is then implemented. It has been found that about ten such cycles are sufficient to obtain uniform and sufficient wetting of the laundry. It is only after these various cycles that the drum rotates at the speed V3 of the order of 50 revolutions per minute for washing or rinsing.
  • the rotational speed for washing being 50 revolutions per minute it has been found that good wetting is obtained when the rotational speed is less than 35 revolutions per minute, and preferably between 15 and 35 revolutions per minute.
  • centrifugations are carried out at a speed V2, for example of the order of 500 revolutions per minute, it is not always essential, for wetting the laundry, that the speed V1 is less than the speed V3 of stirring for washing or rinsing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Centrifugal Separators (AREA)
EP85400161A 1984-02-17 1985-01-31 Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour Expired - Lifetime EP0159204B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400161T ATE70574T1 (de) 1984-02-17 1985-01-31 Waschmaschine mit einem leicht ueber den trommelboden reichenden wasserstand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8402439 1984-02-17
FR8402439A FR2559798B1 (fr) 1984-02-17 1984-02-17 Lave-linge dont la cuve contient de l'eau a une faible hauteur au-dessus du fond du tambour

Publications (2)

Publication Number Publication Date
EP0159204A1 EP0159204A1 (fr) 1985-10-23
EP0159204B1 true EP0159204B1 (fr) 1991-12-18

Family

ID=9301144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400161A Expired - Lifetime EP0159204B1 (fr) 1984-02-17 1985-01-31 Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour

Country Status (5)

Country Link
EP (1) EP0159204B1 (es)
AT (1) ATE70574T1 (es)
DE (1) DE3584904D1 (es)
ES (1) ES8606549A1 (es)
FR (1) FR2559798B1 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0241567B1 (de) * 1986-04-12 1988-08-10 WFK-Testgewebe GmbH Verfahren zum Waschen von Wäschestücken aus Wolle
DE3642578A1 (de) * 1986-12-12 1988-06-23 Bosch Siemens Hausgeraete Waschverfahren
DE3707147A1 (de) * 1987-03-06 1988-09-15 Henkel Kgaa Verfahren zum waschen und/oder spuelen von textilmaterialien sowie hierfuer geeignete vorrichtungen
FR2655363B1 (fr) * 1989-12-05 1994-08-26 Ciapem Lave-linge dont la vitesse de rotation du tambour varie en fonction de la charge.
JPH08299658A (ja) * 1995-05-12 1996-11-19 Toshiba Corp ドラム式洗濯機
ES2146130B1 (es) * 1995-12-27 2001-02-16 Fagor S Coop Metodo de lavado de ropa en una lavadora domestica.
DE102006018539A1 (de) * 2006-04-21 2007-10-25 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine, insbesondere Haushalt-Geschirrspülmaschine
JP5023900B2 (ja) 2006-09-05 2012-09-12 株式会社Ｓｕｍｃｏ エピタキシャルシリコンウェーハ
EP2578736A1 (en) * 2011-10-03 2013-04-10 Electrolux Home Products Corporation N.V. Method for washing laundry in a laundry washing machine
EP2792779B1 (en) * 2013-04-18 2015-09-30 Whirlpool Corporation Method for washing laundry in a spray washing machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920492A1 (de) * 1978-06-12 1979-12-20 Schwarzenberg Waschgeraete Verfahren und einrichtung zur steuerung des waschprozesses in haushaltwaschgeraeten
DE3030491A1 (de) * 1980-08-12 1982-02-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum bemessen der automatisch zulaufenden wassermenge und trommelwaschmaschine zur durchfuehrung des verfahrens

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775246A (en) * 1954-08-03 1957-05-22 Westinghouse Electric Int Co Improvements in or relating to the washing of fabrics or the like
DE1438178A1 (de) * 1962-05-17 1969-05-14 Siemens Elektrogeraete Gmbh Einrichtung zur Steuerung eines Zeitprogramms fuer selbsttaetig arbeitende Haushaltsmaschinen
AT243727B (de) * 1961-12-30 1965-11-25 Constructa Werke Ges Mit Besch Programmgesteuerte Wasch- und Schleudermaschine
US3197980A (en) * 1963-09-06 1965-08-03 Whirlpool Co Automatic laundry apparatus having a super wash cycle
US3707857A (en) * 1971-09-20 1973-01-02 Whirlpool Co Multi-purpose sensor assembly for automatic washer
SE443004B (sv) * 1979-05-12 1986-02-10 Hoesch Werke Ag Sett for tvettning av tvettgods i en cylindertvettmaskin med lag vetske/tvettlutsniva i trumman
DE3324481A1 (de) * 1983-07-07 1985-01-24 Miele & Cie GmbH & Co, 4830 Gütersloh Waschverfahren fuer eine programmgesteuerte trommelwaschmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920492A1 (de) * 1978-06-12 1979-12-20 Schwarzenberg Waschgeraete Verfahren und einrichtung zur steuerung des waschprozesses in haushaltwaschgeraeten
DE3030491A1 (de) * 1980-08-12 1982-02-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum bemessen der automatisch zulaufenden wassermenge und trommelwaschmaschine zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
ES8606549A1 (es) 1986-04-16
FR2559798A1 (fr) 1985-08-23
EP0159204A1 (fr) 1985-10-23
ES540453A0 (es) 1986-04-16
FR2559798B1 (fr) 1986-11-07
DE3584904D1 (de) 1992-01-30
ATE70574T1 (de) 1992-01-15

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