EP1295980B1 - Haushaltwaschmaschine mit Wasserrückführung und niedrigem Wasserverbrauch - Google Patents

Haushaltwaschmaschine mit Wasserrückführung und niedrigem Wasserverbrauch Download PDF

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Publication number
EP1295980B1
EP1295980B1 EP02016697A EP02016697A EP1295980B1 EP 1295980 B1 EP1295980 B1 EP 1295980B1 EP 02016697 A EP02016697 A EP 02016697A EP 02016697 A EP02016697 A EP 02016697A EP 1295980 B1 EP1295980 B1 EP 1295980B1
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EP
European Patent Office
Prior art keywords
water
discharge
tub
washing machine
manifold
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
EP02016697A
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English (en)
French (fr)
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EP1295980A1 (de
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
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Electrolux Home Products Corp NV
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Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Publication of EP1295980A1 publication Critical patent/EP1295980A1/de
Application granted granted Critical
Publication of EP1295980B1 publication Critical patent/EP1295980B1/de
Anticipated expiration legal-status Critical
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    • 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.
  • FR 1 372 338 discloses a washing machine comprising means for the control of the water supply of the tub, an electric motor for the drive of washing means, as well as a pump which can be actuated at will or automatically and being used to eliminate water from the tub and whose driving means under operation are cut off by a commutation device when the lower level of washing liquid in the tub is reached. Furthermore the washing machine comprises a timed control device adapted to short-circuit the commutation device when the lower level of washing liquid in the tub is reached in order to extend the operation time of the pump for a period which can be regulated at will.
  • 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)

Claims (5)

  1. Wäschewaschmaschine vorzugsweise für den Gebrauch im Haushalt, welche umfasst:
    eine mit Löchern versehene Trommel (1) für die Aufnahme und die Behandlung der zu waschenden Wäschestücke,
    einen stationären Bottich (2), welcher die genannte Trommel (1) enthält,
    eine Wasserzuführungseinrichtung (3), welche sich außerhalb des genannten Bottichs (2) befindet und so ausgelegt ist, dass sie wahlweise vorher festgelegte Wassermengen in den genannten Bottich einlässt;
    einen Ausflussverteiler (4), welcher sich unterhalb des genannten Bottichs befindet und geeignete Mittel zum Pumpen von Wasser (5) enthält,
    ein Ausflussrohr (6), welches mit einem seiner Enden an den genannten Verteiler angeschlossen und so ausgelegt ist, dass es das von den genannten Pumpmitteln (5) verdrängte Wasser nach außen befördert,
    eine Verbindungsmuffe (7), welche eine Öffnung (8) im Boden des genannten Bottichs mit dem genannten Ausflussverteiler (4) verbindet,
    einen Druckschalter (9), welcher mit der genannten Verbindungsmuffe (7) an einer dazwischen liegenden Stelle verbunden ist,
    einen Umwälzverteiler (10), welcher über eine erste Leitung (11) an den genannten Ausflussverteiler (4) angeschlossen und über eine zweite Leitung (12) mit geeigneten Mitteln (13) verbunden ist, welche darauf ausgerichtet sind, Waschlauge in die genannte Trommel zu sprühen oder ihr auf irgendeine andere Weise zuzuführen,
    geeignete Pumpmittel (14), welche an den genannten Umwälzverteiler (10) angeschlossen und so ausgelegt sind, dass sie Wasser über die genannte erste Leitung (11) und die genannte zweite Leitung (12) vom genannten Ausflussverteiler zu den genannten Sprühmitteln (13) pumpen, damit Lauge in die genannte Trommel gelangt,
    wobei die genannte Wäschewaschmaschine so ausgelegt ist, dass sie eine vorher eingestellte zeitliche Aufeinanderfolge von Phasen ausführt, welche mindestens eine Waschphase und eine Wasserentzugsphase enthält, denen eine oder mehrere Spülphasen folgen, welche zugehörige Wasserentzugs-Unterphasen enthalten können, wobei möglicherweise allen derartigen Wasserentzugsphasen zugehörige Phasen aus gleichzeitigem Wasserentzug und Schleudern folgen können, dadurch gekennzeichnet, dass sie so ausgelegt ist, dass sie am Ende der genannten gleichzeitig ablaufenden Wasserentzugsund Schleuderphasen und vor dem Beginn der genannten Spülphase, während die Wasserentzugsphase noch läuft, eine Austreibungs-Unterphase ausführt, in welcher eine vorher festgelegte Menge an frischem und sauberem Wasser direkt in den genannten Ausflussverteiler (4) eingeleitet wird, um die genannte Waschlauge aus dem genannten Ausflussrohr (6) hinaus zu drücken.
  2. Wäschewaschmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass die genannte Wasseraustreibungsphase die nachfolgenden Bedingungen und Betriebsschritte umfasst:
    normaler Betrieb der genannten Wasserpumpmittel (5) des genannten Ausflussverteilers dergestalt, dass die genannte Verbindungsmuffe (7) weitestgehend geleert wird, wenn sich der Füllstand der Wassersäule nach unten hin bei einem minimalen Füllstand (Lmin) stabilisiert,
    nach Beendigung des weiter oben genannten Betriebsschrittes lässt man über die genannte äußere Wasserzuführungseinrichtung (3) die genannte vorher festgelegte zusätzliche Menge an Wasser in den genannten Bottich fließen,
    Weiterführung des Betriebes der genannten Wasserpumpmittel (5) im genannten Ausflussverteiler, bis der Füllstand der Wassersäule in der genannten Verbindungsmuffe im Wesentlichen sich wieder auf den genannten Füllstand (Lmin) eingestellt hat.
  3. Wäschewaschmaschine gemäß Anspruch 2, dadurch gekennzeichnet, dass das Volumen der genannten vorher festgelegten zusätzlichen Menge an Wasser, welche in den Bottich eingelassen wird, lediglich geringfügig größer als das Innenvolumen des genannten Ausflussrohres (6) ist.
  4. Wäschewaschmaschine gemäß Anspruch 2 oder 3, dadurch gekennzeichnet, dass während der abschließenden Wasserentzugsphase und möglicherweise Schleuderphase der Betrieb der genannten Pumpmittel (5) unterbrochen wird, wenn sich die Wassersäule in der genannten Verbindungsmuffe (7) auf einen vorher festgelegten Füllstand (L) absenkt, welcher höher als der minimale Füllstand (Lmin) ist.
  5. Wäschewaschmaschine gemäß Anspruch 4, dadurch gekennzeichnet, dass der vorher festgelegte Füllstand (L) geringfügig unter dem niedrigsten Punkt der genannten Trommel liegt, so dass verhindert wird, dass die Letztere mit der darunter befindlichen Lauge in Berührung kommt, wenn die Trommel mit einer hohen Drehzahl betrieben wird.
EP02016697A 2001-09-20 2002-07-26 Haushaltwaschmaschine mit Wasserrückführung und niedrigem Wasserverbrauch Expired - Lifetime EP1295980B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

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EP02016697A Expired - Lifetime EP1295980B1 (de) 2001-09-20 2002-07-26 Haushaltwaschmaschine mit Wasserrückführung und niedrigem Wasserverbrauch

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2559803A1 (de) 2011-08-18 2013-02-20 Miele & Cie. KG Waschmaschine mit einem Laugenbehälter und Umflutpumpe
DE102017106725A1 (de) * 2017-03-29 2018-10-04 Miele & Cie. Kg Verfahren zum Betreiben eines wasserführenden Reinigungsgeräts und wasserführendes Reinigungsgerät
US11168434B2 (en) 2019-01-23 2021-11-09 Haier Us Appliance Solutions, Inc. Valve manifold with auxiliary inlet for a washing machine appliance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE639979A (de) * 1962-11-17
DE2950929B1 (de) * 1979-12-18 1981-04-16 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum Spuelen von in einer programmgesteuerten Waschmaschine gewaschener Waesche

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DE60201565T2 (de) 2005-10-27
ITPN20010067A1 (it) 2003-03-20
DE60201565D1 (de) 2004-11-18
EP1295980A1 (de) 2003-03-26
ATE279566T1 (de) 2004-10-15

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