EP0705561B1 - Durchflussregeleinrichtung zur wahlweisen Speisung der Sprüharme einer Geschirspülmaschine - Google Patents

Durchflussregeleinrichtung zur wahlweisen Speisung der Sprüharme einer Geschirspülmaschine Download PDF

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Publication number
EP0705561B1
EP0705561B1 EP95202604A EP95202604A EP0705561B1 EP 0705561 B1 EP0705561 B1 EP 0705561B1 EP 95202604 A EP95202604 A EP 95202604A EP 95202604 A EP95202604 A EP 95202604A EP 0705561 B1 EP0705561 B1 EP 0705561B1
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EP
European Patent Office
Prior art keywords
rotors
wire
feed pipes
lever
movement
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
EP95202604A
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English (en)
French (fr)
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EP0705561A1 (de
Inventor
Silvano Fumagalli
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Candy SpA
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Candy SpA
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Publication date
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Publication of EP0705561A1 publication Critical patent/EP0705561A1/de
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms

Definitions

  • the present invention relates to a device for controlling a valve device which regulates the flow of washing liquid, for feeding the spraying rotors of a dishwasher machine selectively.
  • a device for controlling the flow of washing liquid placed between the delivery of the washing pump and the feed pipes of the two spraying rotors (upper rotor and lower rotor), which pipes are positioned inside the washing tub of the dishwasher.
  • This device comprises a membrane which is moved by an actuator between two working positions, in one of which both the pipes for feeding the rotors are open, while in the other position the pipe for feeding the lower rotor is closed, so as to allow feeding of the upper rotor alone.
  • the dishwasher can be programmed for feeding a smaller volume of water than that required for washing a complete load, without thereby giving rise to pressure drop problems or even cavitation of the washing pump, in that it is possible to feed only one of the rotors (preferably the upper one).
  • the object of the present invention is that of providing a device for controlling a valve device which regulates the flow of washing liquid feeding the spraying rotors.
  • a device for controlling a valve device which regulates a flow of washing liquid and which is placed between means for pumping the washing liquid and two feed pipes of two respective spraying rotors of a dishwasher, for selective feeding of said rotors characterised in that it comprises means for selecting the working condition of said valve device housed in a control panel of the dishwasher and operatively connected to said valve device by mechanical transmission means.
  • FR-A-2 443 231 and EP-A-0 054 448 also disclose dishwashers with the pre-characterizing claim 1 features.
  • a fully mechanical device for controlling a valve device which regulates the feed flow of the rotors.
  • a control device comprises a knob 1 rotatably housed in a respective circular seat formed in a control panel 2, mounted in turn on a door 3 of a dishwasher.
  • the knob 1 is coupled to a small shaft 4 whereto a fork lever 5 is integrally attached, between whose two prongs 51 a small wire 6 is slidingly inserted and ending in a small ball 7, greater in diameter than the distance between the aforementioned prongs 51 (Figs. 1-3).
  • the lever 5 allows the rotational movement of the knob 1 to be transformed into the translational movement of the wire 6.
  • a first cam 8 is also attached to the shaft 4 and co-operates with an underlying positioning element 9 to determine three angular lock positions (indicated to a user by the alignment of one of three indices "A", "B” and “C” on the knob 1 with a reference notch 52 on the control panel 2, as can be seen in Fig. 4), and a further two cams 10 and 11, each of which determines, in a respective angular position of the knob 1, closure of an electrical contact between respective electrical terminals 12, 12' and 13, 13' (Figs. 1 and 3). The function of these electrical contacts is to be explained hereinbelow in the description.
  • the panel 2, near the knob 1, is also connected to a stretching device 53, which can be seen in a sectioned view in Figure 2.
  • the stretching device 53 substantially consists of a hollow cylinder 54, inside whereof a helical spring 55 is housed, which acts on a nut 56, integral with the wire 6, so as to force the wire 6 into a position of minimum extension (a position shown by an unbroken line in Figure 2): this guarantees that the wire 6 is always kept tight.
  • the spring 55 also acts as a return spring for the wire 6 when, by rotating the knob 1, there is a change from a condition of maximum extension to a condition of minimum extension of the wire 6 itself (for example, from position "C" to positions "B” or "A”).
  • the stretching device 53 is also provided with a regulation element 57 which can be screwed into the cylinder 54 and which acts as a contrast to the nut 56. By screwing or unscrewing the regulation element 57, the various tolerances can be compensated.
  • the wire 6 is slidingly inserted in a sheath 14.
  • the sheath 14 extends vertically along the wall of the door 3, and then is inserted in a gap between a washing tub 40 and a base surface 41 of the dishwasher, so as not to interfere with the door 3 during rotation through almost 90° for opening of the dishwasher.
  • the wire 6 is connected at the opposite end to a valve device 15 which regulates the flow of washing liquid, which device is placed between the delivery 42 of a washing pump 43 and two feed pipes 44 and 45 of two respective spraying rotors 46 and 47 positioned inside the washing tub 40 (Fig. 8).
  • the rotor 46 lower rotor
  • the rotor 47 upper rotor
  • the rotor 46 is placed substantially on the base of the washing tub 40, below a first loading rack (not shown)
  • the rotor 47 upper rotor
  • the valve device 15 substantially comprises a cylindrical conduit 48, divided internally by a baffle 49 into two semi cylindrical conduits 30 and 31 (Figs. 12 and 13), connected to the feed pipe 44 and to the feed pipe 45 respectively (Figs. 9-11).
  • a blade 16 integral with a rotary pin 17 (Figs. 9-11) whereto a fork lever 18, similar to the lever 5, is attached (Figs. 8 and 12).
  • the wire 6 is slidingly inserted between the prongs 32 and 33 of the lever 18, and a small ball 19 is attached at its end, with diameter greater than the distance between said prongs.
  • Rotating the knob 1 causes rotation of the shaft 4 and, consequently, that of the lever 5 integral therewith.
  • the latter causes sliding of the wire 6 inside the sheath 14, and hence rotation of the lever 18.
  • the three working positions "A", "B” and “C” of the knob 1 are translated into the same number of angular positions of the blade 16.
  • one of the contacts between the electrical terminals 12, 12' and 13, 13' closes so as to signal to a device (not shown) for measuring the volume of water to be fed that the dishwasher has been programmed to perform washing of a reduced load, and hence the volume of water to be fed is equal to the volume foreseen for this reduced load.
  • a device for measuring the volume of water to be fed that the dishwasher has been programmed to perform washing of a reduced load, and hence the volume of water to be fed is equal to the volume foreseen for this reduced load.
  • MI94A001078 Such a measuring device is for example described in the Italian patent Application no. MI94A001078.
  • the dishwasher can therefore be used traditionally for washing a complete load of twelve table settings, feeding both rotors, or it can be programmed to wash a reduced load, for example six table settings, using either the upper rack or the lower rack, according to needs, and quite simply by actuating the knob 1.
  • the knob 1 is replaced by a cursor 20, in plastic for example, housed vertically slidingly in the control panel 2 of the door 3.
  • the cursor 20 has a grip 21 projecting from the panel 2 through a slot 22.
  • the wire 6 is restrained to the cursor 20 by means of the end ball 7.
  • no lever is provided, in that the movement of the cursor 20 is already translational.
  • the cursor 20 is provided with a lateral appendage 23 integral with the cursor 20 and relatively flexible, which can be engaged in three respective positioning notches 24 formed in the panel 2.
  • Each of the notches 24 causes the cursor 20 to stop in a position wherein a reference notch 60, formed on the grip 21, is aligned with a respective index "A", "B” or “C” (Fig. 7).
  • the cursor 20 is also provided with a pair of cams 25 which, following sliding of the cursor 20 itself, cause actuation of a lever 26 of a microswitch 27, whose function is that of closing the electrical contacts between the electrical terminals 12, 12' and 13, 13'.
  • the operating principle of the cursor 20 is the same as the knob 1, with the sole exception that the movement of selecting the position of the blade 16 is translational rather than rotational.
  • FIGS 14-18 show a third embodiment of the present invention.
  • a knob 1 is again provided, rotatingly housed in a respective circular seat formed in the control panel 2.
  • the knob 1 is integral with a shaft 4 of an electric motor 38.
  • a cam 39 is also integral with the shaft 4.
  • a tilting lever 28, with its fulcrum in 29 at the panel 2 is provided with a cog 70 which engages with the cam 39.
  • the wire 6 is attached to the lever 28.
  • the cam 39 is substantially a disk having a first segment 71 with a smaller radius, a second segment 72 with a larger radius and a third segment 73 with intermediate radius.
  • the first and second segments 71, 72 have substantially equal width, while the third segment 73 has a much smaller width than the first two.
  • the control device can operate both manually and automatically.
  • a reference notch 74 located on the knob itself, is brought into one of three circular segments indicated as "A", "B” and “C” on the panel 2 (Fig. 18).
  • the cam 39 is rotated so that the cog 70 of the lever 28 engages with the segment 73 with intermediate radius (Fig. 15).
  • the lever 28 makes the wire 6 extend, and the blade 16 moves into the position of Figure 10.
  • the cam 39 is rotated in such a way that the cog 70 engages with the segment 71 of smaller radius (Fig. 16).
  • the motor 38 is started up, and the cam 39 is made to rotate automatically: the static conditions described above become dynamic conditions.
  • the cog 70 of the lever 28 engages in sequence with the three segments 71-73 of the cam 39, the time of permanence in each segment depending on the speed of rotation of the motor and of the width of the segment itself. Since the width of the segment 73 is much smaller than that of the segments 71 and 72, the phase of simultaneous opening of the two feed pipes 44 and 45 of the two rotors is a brief transition phase, and substantially the upper rotor and the lower rotor are actuated alternately.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Steuervorrichtung für eine Ventileinrichtung (15), welche einen Waschflüssigkeitsstrom regelt, und die zwischen einer Einrichtung (43) zum Pumpen der Waschflüssigkeit und zwei Zufuhrleitungen (30, 44, 31, 45) von zwei zugeordneten Sprührotoren (46, 47) einer Geschirrspülmaschine zur selektiven Speisung der Rotoren (46, 47) angeordnet ist, dadurch gekennzeichnet, daß sie eine Einrichtung (1, 4, 5; 20; 1, 4, 39, 28) aufweist, welche in einem Bedienungsfeld (2) der Geschirrspülmaschine untergebracht ist und mit der Ventileinrichtung (15) über eine mechanische Übertragungseinrichtung (6, 14, 53, 36) zum Wählen der Arbeitsbedingungen der Ventileinrichtung (15) betriebsverbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die mechanische Übertragungseinrichtung (6, 14, 53, 36) einen Kabelzug (6) aufweist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Kabelzug (6) gleitbeweglich in einem Außenmantel (14) angeordnet ist.
  4. Vorrichtung nach Anspruch 2 oder 3, bei der die Ventileinrichtung (15) ein bewegliches Element (16) zum Unterbrechen des Flüssigkeitsstroms aufweist, dadurch gekennzeichnet, daß der Kabelzug (6) mit dem Unterbrechungselement (16) derart betriebsverbunden ist, daß die Bewegung der Wähleinrichtung (1, 14, 5; 20; 1, 4, 39, 28) durch ein Ziehen oder Entlasten des Kabelzugs (6) eine Bewegung des Unterbrechungselements (16) bewirkt.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Unterbrechungselement (16) integral mit einem Bolzen (17) ausgebildet ist, an welchem der Kabelzug (6) in einer exzentrischen Position angebracht ist, und daß bei einer Zugbelastung des letzteren eine Drehbewegung des Bolzens (17) und somit eine Bewegung des Unterbrechungselementes (16) bewirkt werden.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Wähleinrichtung (1, 4, 5; 20; 1, 4, 39, 28) einen Knopf (1) aufweist, welcher drehbeweglich in dem Bedienungsfeld (2) angeordnet und integral mit einem Hebel (5) ausgebildet ist, an welchem der Kabelzug (6) eingehakt ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß sie eine Einrichtung (8, 9) aufweist, welche eine erleichterte Positionierung des Knopfs (1) in drei gesonderten Winkelpositionen gestattet, eine erste Winkelposition zur Bestimmung der Bewegung des Unterbrechungselements (16) in einer Schließstellung einer der beiden Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47), eine zweite Winkelposition, in welcher bewirkt wird, daß das Unterbrechungselement in eine Schließposition der anderen Zufuhrleitung (30, 44, 31, 45) der beiden Rotoren (46, 47) gebracht wird, und eine dritte Winkelposition, in welcher die Öffnung beider Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47) in entsprechender Weise eingestellt wird.
  8. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Wähleinrichtung (1, 4, 5; 20; 1, 4, 39, 28) einen Läufer (20) aufweist, welcher gleitbeweglich in dem Bedienungsfeld (2) angeordnet ist und an welchem der Kabelzug (6) angebracht ist.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß sie eine Einrichtung (23, 24) zum erleichterten Positionieren des Läufers (20) in drei gesonderten Positionen aufweist, eine erste Position zur Bestimmung der Bewegung des Unterbrechungselements (16) zur Einnahme einer Schließstellung einer der Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47), eine zweite Position zur Bestimmung der Bewegung des Unterbrechungselements zur Einnahme einer Schließstellung der anderen Zufuhrleitung (30, 44, 31, 45) der beiden Rotoren (46, 47), und eine dritte Position zur Bestimmung des Öffnungsgrades der beiden Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47).
  10. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Wähleinrichtung (1, 4, 5; 20; 1, 4, 39, 28) folgendes aufweist: einen Knopf (1), welcher drehbeweglich in dem Bedienungsfeld (2) untergebracht ist und integral mit einer Welle (4) eines Elektromotors (38) ausgebildet ist; eine Nockeneinrichtung (39), welche integral mit der Welle (4) ausgebildet ist;und einen Hebel (28) mit einem Drehpunkt in dem Bedienungsfeld (2), an welchem der Kabelzug (6) eingehakt ist, wobei der Hebel mit einer Nase (70) versehen ist, welche mit der Nockeneinrichtung (39) zusammenarbeitet.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Nockeneinrichtung (39) eine Scheibe (39) aufweist, welche eine Mehrzahl von Segmenten (71 - 73) mit unterschiedlichen Radien hat, welche die jeweiligen Drehwinkel des Hebels (28) um den Drehpunkt (29) bestimmen.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Mehrzahl von Segmenten drei Segmente (71, 72, 73) aufweist, wobei ein erstes Segment (71) einen ersten Drehwinkel des Hebels (28) bestimmt, welcher seinerseits die Bewegung des Unterbrechungselements (16) in eine Schließposition einer der Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47) bestimmt, ein zweites Segment (72), welches einen zweiten Drehwinkel des Hebels (28) bestimmt, welcher seinerseits die Bewegung des Unterbrechungselements (16) in eine Schließposition der anderen Zufuhrleitung (30, 44, 31, 45) der beiden Rotoren (46, 47) bestimmt, und ein drittes Segment (73), welches einen dritten Drehwinkel des Hebels (28) bestimmt, welcher seinerseits die Bewegung des Unterbrechungselements (16) in eine Öffnungsposition der beiden Zufuhrleitungen (30, 44, 31, 45) der beiden Rotoren (46, 47) bestimmt.
EP95202604A 1994-10-05 1995-09-27 Durchflussregeleinrichtung zur wahlweisen Speisung der Sprüharme einer Geschirspülmaschine Expired - Lifetime EP0705561B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI942027 1994-10-05
ITMI942027A IT1271243B (it) 1994-10-05 1994-10-05 Dispositivo di comando per un dispositivo valvolare di controllo del flusso di liquido di lavaggio, per alimentare selettivamente le giranti irroratrici di una macchina lavastoviglie

Publications (2)

Publication Number Publication Date
EP0705561A1 EP0705561A1 (de) 1996-04-10
EP0705561B1 true EP0705561B1 (de) 1998-08-19

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EP95202604A Expired - Lifetime EP0705561B1 (de) 1994-10-05 1995-09-27 Durchflussregeleinrichtung zur wahlweisen Speisung der Sprüharme einer Geschirspülmaschine

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EP (1) EP0705561B1 (de)
DE (1) DE69504164T2 (de)
IT (1) IT1271243B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044393B4 (de) * 2004-09-16 2009-04-02 Lg Electronics Inc. Geschirrspüler und Steuerverfahren für einen Geschirrspüler

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812231A1 (de) * 1998-03-20 1999-09-23 Aeg Hausgeraete Gmbh Geschirrspülmaschine
EP1128759B8 (de) * 1998-10-16 2004-12-15 Arcelik A.S. Geschirrspülmaschine mit unabhängig gesprizten geschirrkörben
IT1311444B1 (it) 1999-11-16 2002-03-12 Eltek Spa Dispositivo di intercettazione del flusso di un fluido, in particolare per macchine di lavaggio di uso domestico.
DE102005043923B4 (de) * 2004-09-14 2009-10-29 Lg Electronics Inc. Geschirrspüler
KR100662353B1 (ko) 2004-09-14 2007-01-02 엘지전자 주식회사 식기세척기
DE102007041299A1 (de) * 2007-08-31 2009-03-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine
ITPR20130023A1 (it) * 2013-03-29 2014-09-30 Indesit Co Spa Lavastoviglie.
EP3636972A1 (de) * 2018-10-10 2020-04-15 Whirlpool Corporation Mehrweg-umleitventil für geschirrspüler

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Publication number Priority date Publication date Assignee Title
DE7821866U1 (de) * 1978-07-21 1978-11-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Geschirrspuelmaschine
FR2443231A2 (fr) * 1978-12-08 1980-07-04 Esswein Sa Procede de lavage de la vaisselle, systeme de mise en oeuvre de ce procede, et machine a laver la vaisselle munie d'un tel systeme
FR2494804A1 (fr) * 1980-11-27 1982-05-28 Esswein Sa Dispositif de distribution d'eau et lave-vaiselle equipe d'un tel dispositif
IT1135789B (it) * 1981-05-14 1986-08-27 Candy Ind Spa Perfezionamento nelle macchine lavastoviglie
DE3209542C1 (de) * 1982-03-16 1992-05-07 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Geschirrspülmaschine
IT1156020B (it) * 1982-05-26 1987-01-28 Indesit Dispositivo per l alimentazione alternata dei collettori rotanti di una macchina lavastoviglie
IT1191526B (it) * 1986-03-19 1988-03-23 Zanussi Elettrodomestici Macchina lavatrice con valvola di distribuzione del flusso di un liquido

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044393B4 (de) * 2004-09-16 2009-04-02 Lg Electronics Inc. Geschirrspüler und Steuerverfahren für einen Geschirrspüler

Also Published As

Publication number Publication date
DE69504164T2 (de) 1999-01-21
DE69504164D1 (de) 1998-09-24
EP0705561A1 (de) 1996-04-10
IT1271243B (it) 1997-05-27
ITMI942027A1 (it) 1996-04-05
ITMI942027A0 (it) 1994-10-05

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