EP1295980A1 - Machine à lessive du type à recirculation avéc une baisse utilisation d'eau - Google Patents

Machine à lessive du type à recirculation avéc une baisse utilisation d'eau Download PDF

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Publication number
EP1295980A1
EP1295980A1 EP02016697A EP02016697A EP1295980A1 EP 1295980 A1 EP1295980 A1 EP 1295980A1 EP 02016697 A EP02016697 A EP 02016697A EP 02016697 A EP02016697 A EP 02016697A EP 1295980 A1 EP1295980 A1 EP 1295980A1
Authority
EP
European Patent Office
Prior art keywords
water
discharge
tub
washing machine
phase
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
EP02016697A
Other languages
German (de)
English (en)
Other versions
EP1295980B1 (fr
Inventor
Silvano Cimetta
Valter Lazzer
Dino Baggio
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 Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Publication of EP1295980A1 publication Critical patent/EP1295980A1/fr
Application granted granted Critical
Publication of EP1295980B1 publication Critical patent/EP1295980B1/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

Definitions

  • the present invention refers to an improved kind of clothes washing machine, preferably for home use, which is adapted to ensure a particularly low water usage.
  • One of the home appliances that normally requires appreciable water amounts in each working cycle thereof is the clothes washing machine; such an appliance works by letting a first amount of water into a washing tub, together with the clothes to be washed and the detergent or washing product, and then appropriately processing such clothes until they are thoroughly washed.
  • the liquor used to carry it out is discharged outside the machine by means of a drain pump via an appropriate siphon-shaped outlet hose.
  • This is subsequently followed by a sequence of rinsing phases consisting of pre-determined amounts of water being let into the tub and related agitation and water-discharge steps being performed, so that detergent residues are gradually rinsed off the washed clothes.
  • the discharge pipe is generally known to become filled with the liquor that was previously contained in the washing tub, and such a liquor so contained in the discharge pipe is in turn generally known to be retained there until the subsequent discharge phase takes place and, of course, it is heavily contaminated with detergent and soil particles.
  • This liquor is then normally mixed with fresh water flowing in from the water distribution mains, but, owing to said liquor being rather heavily contaminated as already pointed out above, it unavoidably worsens the rinsing effectiveness of the resulting mixture to a considerable extent.
  • This greater amount of fresh water needed in the rinsing phases must furthermore be multiplied by the number of all such rinses and, considering that no less than three rinses are usually provided in a washing programme of a clothes washing machine, the aggregate additional amount of fresh water, needed to adequately dilute the polluting substances contained in the liquor flowing back from the discharge pipe, ultimately bears heavily on the total water usage of the washing machine to complete a washing programme, so that it is becoming less and less acceptable.
  • the clothes washing machine of the above cited kind shall be capable of being easily implemented through the use of readily available means and techniques; it shall in addition be competitive in its construction and convenient in its use; in particular, it shall be capable of being made with a minimum extent of modifications to be introduced with respect to clothes washing machine designs being currently produced.
  • the new features so added to the washing machine shall furthermore be such as to avoid impairing or affecting the overall reliability of the machine itself.
  • a clothes washing machine comprises a perforated drum 1 that is provided rotatably within an enclosed tub 2; an arrangement 3 for letting water from the mains into said tub comprises a dispenser and a conduit 3A connecting said dispenser with said tub.
  • a discharge manifold 4 which is connected on one side to the discharge pipe 6 and, on the opposite intake side, to the sleeve 7 which is in turn connected, at the other end portion thereof, with an aperture 8 provided in the bottom of said tub.
  • a suitable recirculation manifold 10 that is connected via an appropriate first conduit 11 to said discharge manifold and, via a second conduit 12, to per se known means 13 adapted to direct a water jet towards the interior of said drum.
  • said recirculation manifold 10 is provided with a suitable pump 14 that is adapted to take in liquor from the discharge manifold and pump it towards said means 13 for letting the liquor into said drum.
  • C f Q(fabrics) V(fabrics) where V(fabrics) is the amount of water retained in the clothes, so that the quantity of pollutants in the clothes will be:
  • Q(fabrics) C f ⁇ V(fabrics)
  • the two values of the concentrations C 1 and C 3 are homogeneous since they are obtained with equal amounts of water being used in the aggregate, even though the first value is referred to a traditional cycle, while the second value refers to a cycle according to the present invention.
  • the reduced concentration obtained in this manner may be used to advantage also in the opposite way, i.e. by accepting a normal concentration, but reducing the amount of fresh water used in the rinsing phase accordingly.
  • An improvement of the present invention can be easily obtained considering that the water of the last rinse cycle is usually clean enough as to be capable of being re-used without any problem; as a result, the just described mode of operation is avoided and, through the pressure switch 9, the water discharge phase is interrupted as soon as the water head in the sleeve and, possibly, even in the lower portion of the tub reaches down to a level L lying just below the lowest level of the drum, so as to avoid hindering the spin-extraction phase.
  • Exhaustive tests carried out on average-performance clothes washing machines have demonstrated that it is possible for approx. 2 litres of fresh water to be saved in this manner per washing programme.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP02016697A 2001-09-20 2002-07-26 Machine à lessive du type à recirculation avéc une baisse utilisation d'eau Expired - Lifetime EP1295980B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001PN000067A ITPN20010067A1 (it) 2001-09-20 2001-09-20 Lavabiancheria domestica a ricircolo a basso consumo d'acqua.
ITPN20010067 2001-09-20

Publications (2)

Publication Number Publication Date
EP1295980A1 true EP1295980A1 (fr) 2003-03-26
EP1295980B1 EP1295980B1 (fr) 2004-10-13

Family

ID=11453308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02016697A Expired - Lifetime EP1295980B1 (fr) 2001-09-20 2002-07-26 Machine à lessive du type à recirculation avéc une baisse utilisation d'eau

Country Status (4)

Country Link
EP (1) EP1295980B1 (fr)
AT (1) ATE279566T1 (fr)
DE (1) DE60201565T2 (fr)
IT (1) ITPN20010067A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2559803A1 (fr) 2011-08-18 2013-02-20 Miele & Cie. KG Lave-linge doté d'une cuve et d'une pompe à circulation
EP3382087A1 (fr) * 2017-03-29 2018-10-03 Miele & Cie. KG Procédé de fonctionnement d'un appareil de nettoyage à circulation d'eau et appareil de nettoyage à circulation d'eau
US11168434B2 (en) 2019-01-23 2021-11-09 Haier Us Appliance Solutions, Inc. Valve manifold with auxiliary inlet for a washing machine appliance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1372338A (fr) * 1962-11-17 1964-09-11 Bosch Gmbh Robert Machine à laver
EP0030602A1 (fr) * 1979-12-18 1981-06-24 Bosch-Siemens HausgerÀ¤te GmbH Procédé et dispositif pour le rinçage du linge lavé dans une machine à laver à commande à programme

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1372338A (fr) * 1962-11-17 1964-09-11 Bosch Gmbh Robert Machine à laver
EP0030602A1 (fr) * 1979-12-18 1981-06-24 Bosch-Siemens HausgerÀ¤te GmbH Procédé et dispositif pour le rinçage du linge lavé dans une machine à laver à commande à programme

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2559803A1 (fr) 2011-08-18 2013-02-20 Miele & Cie. KG Lave-linge doté d'une cuve et d'une pompe à circulation
EP3382087A1 (fr) * 2017-03-29 2018-10-03 Miele & Cie. KG Procédé de fonctionnement d'un appareil de nettoyage à circulation d'eau et appareil de nettoyage à circulation d'eau
US11168434B2 (en) 2019-01-23 2021-11-09 Haier Us Appliance Solutions, Inc. Valve manifold with auxiliary inlet for a washing machine appliance

Also Published As

Publication number Publication date
DE60201565T2 (de) 2005-10-27
EP1295980B1 (fr) 2004-10-13
ATE279566T1 (de) 2004-10-15
ITPN20010067A1 (it) 2003-03-20
DE60201565D1 (de) 2004-11-18

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