EP1428926B1 - Waschmaschine mit Synchronmotor - Google Patents

Waschmaschine mit Synchronmotor Download PDF

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Publication number
EP1428926B1
EP1428926B1 EP03023702A EP03023702A EP1428926B1 EP 1428926 B1 EP1428926 B1 EP 1428926B1 EP 03023702 A EP03023702 A EP 03023702A EP 03023702 A EP03023702 A EP 03023702A EP 1428926 B1 EP1428926 B1 EP 1428926B1
Authority
EP
European Patent Office
Prior art keywords
shaft
impeller
washing machine
cavity
motor
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
EP03023702A
Other languages
English (en)
French (fr)
Other versions
EP1428926A3 (de
EP1428926A2 (de
Inventor
Ugo Favret
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 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 EP1428926A2 publication Critical patent/EP1428926A2/de
Publication of EP1428926A3 publication Critical patent/EP1428926A3/de
Application granted granted Critical
Publication of EP1428926B1 publication Critical patent/EP1428926B1/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
    • 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
    • D06F39/085—Arrangements or adaptations of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • the present invention refers to an improved kind of machine, preferably of the type for use in households, for washing clothes or dishes, adapted to use in an advantageous manner an electric motor of the synchronous type used in a drain pump.
  • the drainage sump which is generally provided under the bottom of the tub or vessel containing the items to be washed, fills up with the liquor that was previously filling said tub or vessel; from such a drainage sump said liquor is then let off through the operation of an appropriate pump, whose impeller is situated inside said same drainage sump.
  • the motor used to drive such pump is usually an electric motor of the asynchronous type, the operation of which, apart from being well known in the art, does not give rise to any particular problems either in the starting phase or in the final pump-off phase in which the gradual reduction in the amount of liquor to be let off eventually causes decreasing amounts of water to come into contact with the pump impeller along with certain amounts of air being taken in from the interior of the tub or vessel via the drainage sump that is no longer full at this point.
  • asynchronous motors are also largely known to be rather expensive due to the considerable amounts of copper and ferromagnetic material required.
  • synchronous motors require that, during the starting phase, a resisting torque be created on the motor shaft that would enable the rotation of the same motor to be started in the first place.
  • This resisting torque must be rather moderate, so as to avoid blocking the motion of the shaft, but at the same time it must not be too low, since it would in this case risk preventing said rotation from starting at all.
  • an elastic means 8 preferably sitting astride of said cylindrical element and adapted to generate friction when said cavity and said cylindrical element move rotatably relative to each other.
  • the mass of liquor acting on the impeller generates the required controlled amount of resisting torque on the shaft, which, when combined with the definite arc of rotation B, enables the motor to start.
  • the impeller, shrink-fitted onto the motor shaft finds itself being like rushed rotatably forwards with respect to the instant position of the motor shaft itself, this being in fact allowed by the presence of said angle B.
  • the inertia of the impeller tends to cause the same impeller to continue to rotate at the just acquired speed, which is faster than the slowed-down speed of the motor and the protrusion, so that, owing to them being scarcely hindered therefrom by the lower resisting torque provided by the liquor, the same impeller, along with the cavity associated thereto, tends to move away from said pushing edge of the protrusion.
  • the impeller slows down in a sensible manner until it moves eventually back into its initial position in contact with said pushing edge of said protrusion.
  • the braking speed will turn out as being greater than the rotating speed of the shaft, so that, owing to its own inertia, the impeller and, through it, said protrusion 4 move into impinging rather violently against the corresponding edge 13 of said cavity, thereby generating a perceivable rattling noise.
  • such machine shall be able to be easily manufactured using existing, readily available materials and techniques, and be competitive in its construction; it shall additionally be able to incorporate the features of the present invention without suffering any alteration or reduction in the performance abilities and the reliability thereof
  • EP-A-0 287 984 discloses the features of the preamble of claim 1.
  • An appropriate flywheel 33 has therefore been fitted to said shaft 1 of the motor, so as symbolically illustrated in Figure 6, to the purpose of providing the desired increase in the inertia.
  • flywheel 33 may be provided, further to the way in which this is illustrated in Figure 6, also between the rotor 10 of the motor and said impeller, as this is illustrated in Figure 7, or even attached to said cylindrical element 6, so as shown schematically in Figure 7A, or it may be split into two parts to be arranged on a side 33A and on the other side 33B of the rotor, as shown in Figure 8.
  • said protrusion and said respective cavity may exchange position with each other, i.e. the protrusion may change from the shaft to the impeller, and vice-versa, such design option being regarded and classifiable as a simple technical equivalent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Multiple Motors (AREA)
  • Telephone Function (AREA)

Claims (7)

  1. Waschmaschine, insbesondere zum Waschen von Textilien oder Bekleidung, Geschirr oder dergleichen in Wasser, Folgendes umfassend:
    - eine stationäre Laugenwanne oder einen Behälter zur Aufnahme des Waschguts,
    - einen Ablassbehälter, der unterhalb der Laugenwanne oder des Behälters angeordnet ist und geeignete Wasserpumpenmittel zum Auspumpen des Wassers besitzt, wobei das Pumpenmittel von einem Synchron-Elektromotor angetrieben wird, auf dessen Welle (1) ein Pumpenrad (2) in einer Schrumpfverbindung angebracht ist, wobei ein Ende der Welle mit einer exzentrischen Verlängerung (4) versehen ist, wobei das Pumpenrad in seinem mittleren Bereich, wo es an der welle befestigt ist, mit einem ringförmigen Hohlraum (5) versehen ist, der sich kreisförmig nur entlang einem bestimmten Bogenabschnitt (A) erstreckt und geeignet ist, die exzentrische Verlängerung (4) aufzunehmen, welche so dimensioniert ist, dass sie zu einer freien Rotation im Hohlraum über einen vorher bestimmbaren Bogen (B) geeignet ist,
    - ein Wasserablassrohr, das mit einem Ende des Ablassbehälters verbunden ist, und das geeignet ist, das vom Pumpenmittel gepumpte Wasser nach außerhalb der Maschine zu transportieren, wobei die Maschine geeignet ist, eine vorher eingestellte Abfolge von Prozessphasen auszuführen, die mindestens eine Wasserablassphase enthält,
    dadurch gekennzeichnet, dass die Welle des Motors mit einem geeigneten Schwungradmittel (33) ausgestattet ist, so dass eine erwünschte Zunahme an Trägheit gewährleistet ist.
  2. Waschmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass das Schwungrad (33) im Verhältnis zum Rotor (10) des Motors in dem Wellenabschnitt angeordnet ist, der dem Pumpenrad (2) gegenüber angeordnet ist.
  3. Waschmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass das Schwungrad (33) zwischen dem Rotor (10) des Motors und dem Pumpenrad angeordnet ist.
  4. Waschmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass das Schwungrad (33) in zwei getrennte und unabhängige Teile geteilt ist, von denen ein erster (33A) zwischen dem Pumpenrad und dem Rotor (10) des Motors angeordnet ist und der zweite (33B) auf der gegenüber liegenden Seite im Verhältnis zum Rotor angeordnet ist.
  5. Waschmaschine gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    - ein zylindrisches Element (6) koaxial mit der Welle und vorzugsweise in einer Position angeordnet ist, die angrenzend an die Verlängerung ist,
    - im mittleren Bereich des Pumpenrads ein Hohlraum (7) koaxial mit der Welle angeordnet und so dimensioniert ist, dass er das zylindrische Element ohne Behinderung aufzunehmen vermag, und
    - zwischen dem Hohlraum und dem zylindrischen Element ein elastisches Mittel vorgesehen ist, das geeignet ist, eine Reibung zwischen dem zylindrischen Element (6) und dem Hohlraum (7) zu erzeugen, wenn sich diese im Verhältnis zueinander bewegen.
  6. Waschmaschine gemäß Anspruch 5, dadurch gekennzeichnet, dass das elastische Mittel ein Ring (8) ist, der auf einer Ebene angeordnet ist, die im rechten Winkel zur Welle und koaxial zu dieser angeordnet ist.
  7. Waschmaschine gemäß Anspruch 6, dadurch gekennzeichnet, dass der elastische Ring (8) fest um das zylindrische Element angeordnet ist.
EP03023702A 2002-12-10 2003-10-20 Waschmaschine mit Synchronmotor Expired - Lifetime EP1428926B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN20020096 2002-12-10
IT000096A ITPN20020096A1 (it) 2002-12-10 2002-12-10 Macchina di lavaggio con motore asincrono perfezionato.

Publications (3)

Publication Number Publication Date
EP1428926A2 EP1428926A2 (de) 2004-06-16
EP1428926A3 EP1428926A3 (de) 2007-01-24
EP1428926B1 true EP1428926B1 (de) 2008-01-30

Family

ID=32321439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03023702A Expired - Lifetime EP1428926B1 (de) 2002-12-10 2003-10-20 Waschmaschine mit Synchronmotor

Country Status (5)

Country Link
EP (1) EP1428926B1 (de)
AT (1) ATE385269T1 (de)
DE (1) DE60318932T2 (de)
ES (1) ES2297086T3 (de)
IT (1) ITPN20020096A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1883148B1 (de) 2006-07-26 2008-06-18 Electrolux Home Products Corporation N.V. Rotationspumpe getrieben durch einen Synchronmotor mit einer Flüssigkeitsreibungskupplung
ITTO20090566A1 (it) * 2009-07-24 2011-01-25 Indesit Co Spa Macchina di lavaggio, in particolare una lavastoviglie.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD980058A1 (it) * 1998-03-19 1999-09-19 Askoll Holding Srl Dispositivo di trascinamento, con angolo di libera rotazione ampliato fra il motore sincrono a magneti permanenti e l'organo operatore
IT1218569B (it) * 1987-04-22 1990-04-19 Askoll Srl Pompa centrifiga perfezionata per lavatrici, lavastoviglie ed elettrodomestici in genre
US6478555B1 (en) * 1999-06-16 2002-11-12 Lg Electronics, Inc. Apparatus for controlling noise and vibration for drain pump
ATE348268T1 (de) * 2000-07-06 2007-01-15 Askoll Holding Srl Unidirektionales laufrad für eine elektrische kreiselpumpe mit einem permanentmagnet synchronmotor

Also Published As

Publication number Publication date
ITPN20020096A1 (it) 2004-06-11
ES2297086T3 (es) 2008-05-01
EP1428926A3 (de) 2007-01-24
DE60318932T2 (de) 2009-01-29
DE60318932D1 (de) 2008-03-20
ATE385269T1 (de) 2008-02-15
EP1428926A2 (de) 2004-06-16

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