EP0821095A2 - Procédé de lavage pour machine à laver et machine à laver utilisant un tel procédé - Google Patents

Procédé de lavage pour machine à laver et machine à laver utilisant un tel procédé Download PDF

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Publication number
EP0821095A2
EP0821095A2 EP97202248A EP97202248A EP0821095A2 EP 0821095 A2 EP0821095 A2 EP 0821095A2 EP 97202248 A EP97202248 A EP 97202248A EP 97202248 A EP97202248 A EP 97202248A EP 0821095 A2 EP0821095 A2 EP 0821095A2
Authority
EP
European Patent Office
Prior art keywords
water
tank
detergent
washing machine
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
EP97202248A
Other languages
German (de)
English (en)
Other versions
EP0821095A3 (fr
EP0821095B1 (fr
Inventor
Giuseppe Tornari
Fiorenzo Parolini
Ernesto Rebolini
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.)
PHILCO ITALIA SpA
Original Assignee
PHILCO ITALIA 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 PHILCO ITALIA SpA filed Critical PHILCO ITALIA SpA
Publication of EP0821095A2 publication Critical patent/EP0821095A2/fr
Publication of EP0821095A3 publication Critical patent/EP0821095A3/fr
Application granted granted Critical
Publication of EP0821095B1 publication Critical patent/EP0821095B1/fr
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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit

Definitions

  • the present invention refers to an improved washing process for laundry washing machine, and a laundry washing machine for actuating such a process.
  • a first category of said systems includes a pump for the forced recirculation of the washing liquid during the operative cycle of the washing machine.
  • a second category provides for the addition of a shut-off valve on the discharge tube of the wash tank.
  • a third category provides for the addition of a supplementary tube for the recirculation of the washing liquid, recirculation that is determined by the movement of the basket during washing.
  • the object of the present invention is to provide a washing method for laundry washing machines that permits to keep down the consumption of detergents without requiring the installation of further components in the machine.
  • a washing process for laundry washing machine comprising a step for loading water and detergent into a washing tank of the washing machine, characterized in that said water and detergent loading step is preceded by a step for pre-filling the washing tank with water only, and in that during said water and detergent loading step the basket of the washing machine is kept in rotation inside said tank.
  • a detergent savings is achieved, due to the fact that in the pre-filling step of (clean) water only the discharge tube is filled, and during the successive water and detergent loading step - given that the basket is kept in rotation, preferably in one direction - the detergent is kept as far away from the discharge tube as possible, so as to present the detergent itself, not yet dissolved in the water, from precipitating into the discharge tube.
  • Figure 1 is a section view according to a vertical plane of a washing machine in accordance with the invention, during a first operative step of a washing process according to the invention.
  • Figure 2 is a section view analogous to the one in Figure 1, but it refers to a second operative step of said washing process.
  • FIG. 1 a washing machine is schematically shown in section view according to a vertical plane.
  • the washing machine comprises a washing tank 1, inside which a rotatable basket 2 is lodged, rotated by a motor 3.
  • Tank 1 has an inlet tube 4 with an upper part connected to a detergent dispenser 5, and an outlet tube 6 connected, at one end, with the bottom of the tank 1 and, at the other end, to a discharge pump 7.
  • the inside of the detergent dispenser comprises a number of compartments 8A, 8B, 8C separated from each other. To each compartment is associated a respective derivation 9A, 9B, 9C of a clean water supply duct 9. Between each of the derivations 9A, 9B, 9C and the duct 9 is interposed a respective intercepting valve 10A, 10B, 10C individually controlled by a control unit 11, for example composed of a timer normally included in the known washing machines. Timer 11 also controls the activation of motor 3.
  • a control unit 11 for example composed of a timer normally included in the known washing machines. Timer 11 also controls the activation of motor 3.
  • the first compartment 8A of the detergent dispenser 5 is empty, while in the second compartment 8B the detergent (typically in powder form) is loaded.
  • the third compartment 8C can, for example, contain a softener to be employed during the rinsing step.
  • the washing process according to the present invention comprises a first step during which valve 10A associated with the first compartment 8A of the detergent dispenser (the empty one) is opened so as to load a pre-established quantity of clean water, which determines a pre-filling of the discharge duct 6 and also, partially, of tank 1.
  • the basket can be left still. The duration of this step depends on the quantity of water that one may want to pre-load into the washing tank.
  • valve 10A is shut off and valve 10B associated with the second compartment 8B of dispenser 5 (the one containing powdered detergent) is opened.
  • timer 11 commands the activation of motor 3 to bring about the rotation of the basket 2 (in the example, clockwise).
  • the water coming from derivation 9B of the duct 9 passes into compartment 8B, draws out the detergent and carries it into tank 1 where the water with the detergent can pass into basket 2 through holes normally provided in the walls of the same.
  • the detergent is not completely dissolved yet. Nevertheless, thanks to the fact that the discharge tube 6 was pre-filled before and that the basket rotates, it is possible to avoid that the particles of detergent still in a solid state can precipitate into the discharge tube 6, where it would remain useless and wasted.
  • the quantity of water that is loaded in the pre-filling step of the tank, the position of inlet tube 4, the position of discharge tube 6, and the direction of rotation of the basket during the water loading step (with detergent added) must be determined in such a way that the solid detergent which descends into the tank together with the water remains substantially all inside the tank itself and is not allowed to descend into the dead zones (discharge tube) connected to the tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Detergent Compositions (AREA)
EP97202248A 1996-07-22 1997-07-17 Machine à laver utilisant un procédé de lavage amélioré Expired - Lifetime EP0821095B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI001522A IT1283476B1 (it) 1996-07-22 1996-07-22 Procedimento di lavaggio perfezionato per macchina lavabiancheria, e macchina llavabiancheria che attua tale procedimento
ITMI961522 1996-07-22

Publications (3)

Publication Number Publication Date
EP0821095A2 true EP0821095A2 (fr) 1998-01-28
EP0821095A3 EP0821095A3 (fr) 1998-09-09
EP0821095B1 EP0821095B1 (fr) 2002-05-22

Family

ID=11374632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97202248A Expired - Lifetime EP0821095B1 (fr) 1996-07-22 1997-07-17 Machine à laver utilisant un procédé de lavage amélioré

Country Status (5)

Country Link
EP (1) EP0821095B1 (fr)
AT (1) ATE217920T1 (fr)
DE (1) DE69712680T2 (fr)
ES (1) ES2180884T3 (fr)
IT (1) IT1283476B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119630A1 (fr) * 2007-03-29 2008-10-09 Arcelik Anonim Sirketi Lave-linge avec mélangeur contribuant à la dissolution de la lessive
EP2228483A1 (fr) * 2009-03-09 2010-09-15 Panasonic Corporation Machine à laver de type tambour

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH396821A (de) * 1961-11-15 1965-08-15 Bauknecht Gmbh G Waschmaschine
IT1083309B (it) * 1977-05-13 1985-05-21 Zanussi A Spa Industrie Macchina lavabiancheria provvista di mezzi per imedire perdite del detersivo
DE3734117A1 (de) * 1987-10-09 1989-04-20 Bauknecht Hausgeraete Trommelwaschmaschine
JPH0231796A (ja) * 1988-07-22 1990-02-01 Toshiba Corp 洗濯機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119630A1 (fr) * 2007-03-29 2008-10-09 Arcelik Anonim Sirketi Lave-linge avec mélangeur contribuant à la dissolution de la lessive
EP2228483A1 (fr) * 2009-03-09 2010-09-15 Panasonic Corporation Machine à laver de type tambour
CN101831776A (zh) * 2009-03-09 2010-09-15 松下电器产业株式会社 滚筒式洗衣机
CN101831776B (zh) * 2009-03-09 2011-12-21 松下电器产业株式会社 滚筒式洗衣机

Also Published As

Publication number Publication date
ITMI961522A0 (fr) 1996-07-22
ITMI961522A1 (it) 1998-01-22
ATE217920T1 (de) 2002-06-15
DE69712680D1 (de) 2002-06-27
EP0821095A3 (fr) 1998-09-09
ES2180884T3 (es) 2003-02-16
EP0821095B1 (fr) 2002-05-22
DE69712680T2 (de) 2003-01-30
IT1283476B1 (it) 1998-04-21

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