EP0697188B1 - Dispositif pour le dosage contrôlé de liquide de lavage pour les bras d'arrosage d'une machine à laver la vaisselle - Google Patents

Dispositif pour le dosage contrôlé de liquide de lavage pour les bras d'arrosage d'une machine à laver la vaisselle Download PDF

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Publication number
EP0697188B1
EP0697188B1 EP95201934A EP95201934A EP0697188B1 EP 0697188 B1 EP0697188 B1 EP 0697188B1 EP 95201934 A EP95201934 A EP 95201934A EP 95201934 A EP95201934 A EP 95201934A EP 0697188 B1 EP0697188 B1 EP 0697188B1
Authority
EP
European Patent Office
Prior art keywords
conduit
spraying
rotor
flow
feeding
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
EP95201934A
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German (de)
English (en)
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EP0697188A1 (fr
EP0697188B2 (fr
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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Publication date
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Publication of EP0697188A1 publication Critical patent/EP0697188A1/fr
Publication of EP0697188B1 publication Critical patent/EP0697188B1/fr
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Classifications

    • 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 the flow of washing liquid for feeding the spraying rotors of a dishwasher machine.
  • Known dishwasher machines comprise a washing tub in which two horizontal shelves are slidingly housed to hold the dishes to be washed, situated at the bottom (lower shelf) and mid-height (upper shelf) respectively of the washing tub.
  • Two spraying rotors, lower and upper respectively, are associated to said shelves and fed with the washing liquid (mixture of water and detergent) by a motor pump connected to a sump located below the bottom of the washing tub and wherein the washing liquid diffused by the spraying rotors is collected.
  • the two rotors are fed simultaneously, assuming that both the shelves have been loaded with dishes to be washed.
  • the quantity of water which has to be fed into the tub of the dishwasher has to be such that the pump does not go into cavitation and that the pressure of the water emitted by the rotors is not too low.
  • EP-A-0 585 905 discloses a device according to the preamble of claim 1.
  • the object of the present invention is that of providing a device for controlling the flow of washing liquid for feeding the spraying rotors which overcomes the aforementioned disadvantages.
  • this object is achieved thanks to a device for controlling the flow of washing liquid for feeding a first spraying rotor and a second spraying rotor of a dishwasher as set forth in claim 1.
  • the control device enables continuous or discontinuous feeding of one of the two spraying rotors, while the other one can be independently fed or not.
  • the rotor associated to the outlet conduit controlled by said cut-off means is preferably the lower one so that, should the dishwasher be programmed for washing six table settings, the dishes can be loaded on only the upper shelf, and the flow rate and pressure of the pump fully exploited to feed the washing liquid to the upper rotor alone.
  • Figure 1 shows a washing tub 1 of a dishwasher, below which washing tub 1 a sump 2, wherein the washing liquid is collected, is mounted.
  • a motor pump 3 which, taking the liquid from the sump 2, sends it to a lower spraying rotor 4 extending from the bottom of the tub 1 inside the latter and related to a lower loading shelf 100 and to an upper spraying rotor 4', positioned approximately at mid-height inside the tub 1 and related to an upper loading shelf 101 (Figs. 4 and 5).
  • a device 7 for cutting off the flow of washing liquid consisting of a chamber 8 wherein a diaphragm 9, moving between two working conditions (shown as an unbroken line and dotted and dashed line respectively in Figure 1), is hinged. Above the chamber 8 a substantially cylindrical outlet conduit 10 is connected, divided internally into two semicylindrical conduits 11 and 12 by a baffle 13 (Fig. 2).
  • a flow diverter 14 Connected to the outlet conduit 10 is a flow diverter 14, also substantially cylindrical, and wherein a baffle 15, having a substantially vertical lower section 18, is also provided and which divides internally the flow diverter 14 into two semicylindrical conduits 16 and 17, and an upper elbow section 19 which joins the semicylindrical conduit 17 to a horizontal cylindrical conduit 20 for feeding the upper spraying rotor 4'.
  • the flow diverter 14 is inserted in a special hole 21 of the tub 1, and is attached by means of a ring nut 22.
  • the lower spraying rotor 4 is mounted, freely rotatably, above the flow diverter 14.
  • the diaphragm 9 has dimensions which correspond substantially to those of the chamber 8, and is attached at one end to a pin 24. Outside of the chamber 8 the pin 24 is connected to an actuator 25 which causes displacement of the diaphragm 9 into the two working positions.
  • the diaphragm 9 has a semicircular opening 23 which, when the diaphragm 9 is in the closure position shown by a dashed and dotted line in Figure 1, is positioned below the mouth of the semicylindrical conduit 12.
  • both the semicylindrical conduits 11 and 12 are open, and the water coming from the outlet conduit 5 of the pump 3 is distributed among the semicylindrical conduits 11, 16 and 12, 17, thus feeding simultaneously both the lower rotor 4 and the upper rotor 4' (Fig. 4).
  • the diaphragm 9 is in the closure position, the mouth of the semicylindrical conduit 11 is closed, while the mouth of the semicylindrical conduit 12 is open: thus feeding of the lower rotor 4 is interrupted, while the upper rotor 4' continues to be fed (Fig. 5).
  • FIGS 6 and 7 show a second embodiment of the device according to the invention.
  • the control device forms a single body with the pump 3.
  • the conduit 20 Directly connected to the outlet 5 of the pump 3 is the conduit 20, always open, for feeding the upper rotor 4'.
  • Said outlet conduit 5 comprises a substantially horizontal cylindrical end section 26 flowing into a chamber 27 which extends above to form a cylindrical appendage 28 whereon a conduit 29 is fitted and sealed for supporting and feeding the lower rotor 4.
  • This conduit 29 is mounted on the tub 1 in a similar manner to the flow diverter 14 of the previous embodiment.
  • a device for cutting off the fluid comprising a plug 30 controlled by an actuator 31 to move from a first working position, wherein the outlet of the end section 26 of the conduit 5 is open and leads into the chamber 27, to a second working position, wherein the plug 30 closes the outlet of the end section 26 of the conduit 5 (position shown by the dotted and dashed line in Figure 7).
  • a conduit 32 can also be seen, small in size and also connected to the outlet conduit 5 of the pump 3.
  • This conduit can be used for feeding pressurised liquid in other points of the water supply circuit of the dishwasher.
  • this pressurised liquid can be used for cleaning the microfilter normally installed in the sump 2 to filter the liquid coming from the washing tub 1.
  • the conduit 32 can also be used for transferring the liquid contained in the washing tub 1 at the end of the final phase of rinsing to a recovery tank, wherein the liquid is stored until the subsequent washing cycle.
  • the pump 3 performs a double function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (6)

  1. Dispositif pour la commande de l'écoulement de liquide de lavage pour l'alimentation d'un premier rotor de pulvérisation (4) et d'un deuxième rotor de pulvérisation (4') d'un lave-vaisselle, comportant une conduite d'entrée (5) reliée à des moyens de pompage du liquide de lavage, au moins une première conduite de sortie (11; 27, 28) et une deuxième conduite de sortie (12; 20) reliées respectivement aux dits premier et deuxième rotors de pulvérisation (4, 4'), et des moyens (9; 30) destinés à commander l'écoulement de liquide depuis ladite conduite d'entrée (5) vers lesdites conduites de sortie (11; 27, 28; 12; 20), dans lequel lesdits moyens (9; 30) comportent des premiers moyens (9; 30) associés à ladite première conduite de sortie (11; 27, 28) afin de commander l'ouverture et la fermeture de celle-ci et par conséquent couper de manière sélective l'écoulement de liquide de la conduite d'entrée (5) vers la première conduite de sortie (11; 27, 28), caractérisé en ce que la deuxième conduite de sortie (12; 20; 39) est laissée constamment ouverte de sorte que le deuxième rotor de pulvérisation (4') est toujours alimenté, pendant le cycle de lavage.
  2. Dispositif de commande selon la revendication 1, caractérisé en ce que ladite première conduite de sortie et ladite deuxième conduite de sortie sont respectivement une première partie semi-cylindrique (11) et une deuxième partie semi-cylindrique (12) d'une conduite cylindrique (10) définie par une chicane (13) à l'intérieur de ladite conduite cylindrique (10), lesdits premiers moyens de coupure comportant un diaphragme (9) qui peut être entraíné en rotation entre une position d'ouverture et une position de fermeture de ladite première partie semi-cylindrique (11) de la conduite cylindrique (10).
  3. Dispositif de commande selon la revendication 1, caractérisé en ce que lesdits premiers moyens de coupure comportent un bouchon (30) pouvant coulisser entre une position d'ouverture et une position de fermeture de ladite première conduite de sortie (27, 28).
  4. Dispositif de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit premier rotor de pulvérisation (4) est associé à un plateau de chargement inférieur (100), et ledit deuxième rotor de pulvérisation (4') est lié à un plateau de chargement supérieur (101).
  5. Dispositif de commande selon la revendication 4, caractérisé en ce que lesdites première et deuxième conduites de sortie sont deux parties semi-cylindriques (38, 39) d'une conduite cylindrique (34), lesdits premier et deuxième moyens de coupure comportant respectivement un premier et un deuxième bouchon (42, 43) pouvant coulisser indépendamment entre une position d'ouverture et une position de fermeture d'une partie semi-cylindrique (38, 39) respective.
  6. Dispositif de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit premier rotor de pulvérisation (4) est associé à un plateau de chargement inférieur (100), et ledit deuxième rotor de pulvérisation (4') est lié à un plateau de chargement supérieur (101).
EP95201934A 1994-07-27 1995-07-13 Dispositif pour le dosage contrôlé de liquide de lavage pour les bras d'arrosage d'une machine à laver la vaisselle Expired - Lifetime EP0697188B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI941602 1994-07-27
ITMI941602A IT1274298B (it) 1994-07-27 1994-07-27 Dispositivo di controllo del flusso di liquido di lavaggio per alimentare le giranti irroratrici di una macchina lavastoviglie

Publications (3)

Publication Number Publication Date
EP0697188A1 EP0697188A1 (fr) 1996-02-21
EP0697188B1 true EP0697188B1 (fr) 2001-10-31
EP0697188B2 EP0697188B2 (fr) 2005-02-09

Family

ID=11369375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95201934A Expired - Lifetime EP0697188B2 (fr) 1994-07-27 1995-07-13 Dispositif pour le dosage contrôlé de liquide de lavage pour les bras d'arrosage d'une machine à laver la vaisselle

Country Status (3)

Country Link
EP (1) EP0697188B2 (fr)
DE (1) DE69523519T3 (fr)
IT (1) IT1274298B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857103A1 (de) * 1998-12-10 2000-06-15 Bsh Bosch Siemens Hausgeraete Haushalt-Geschirrspülmaschine
DE19914359C5 (de) * 1999-03-30 2006-01-05 Whirlpool Corp., Benton Harbor Geschirrspülmaschine mit oberem und unterem Sprüharm
EP1728461A1 (fr) * 2005-06-01 2006-12-06 Coprecitec, S.L. Lave-vaisselle domestique avec une chambre de distribution d'eau

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7044916U (de) * Industrie A Zanussi Spa Wasserzuflußkolonne für die Spruharme einer Geschirrspulmaschine
DE3014663A1 (de) * 1980-04-16 1981-10-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum betreiben einer haushalt-geschirrspuelmaschine sowie derartige maschine zur durchfuehrung des verfahrens
DE8806160U1 (de) * 1988-05-09 1988-11-03 Rapp, Helmut, 8126 Hohenpeißenberg Spülmaschine mit einem in den Spülraum einführbaren Träger für das Spülgut

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2345908A1 (de) * 1973-09-12 1975-03-20 Licentia Gmbh 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
DE2922442C2 (de) * 1979-06-01 1982-12-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Umschalteinrichtung in der Umwälzleitung einer Geschirrspülmaschine
DE3406698A1 (de) * 1984-02-24 1985-08-29 Buderus Ag, 6330 Wetzlar Umschaltvorrichtung fuer eine geschirrspuelmaschine
DE3441023C2 (de) * 1984-11-09 1986-09-18 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kreiselpumpe für eine Geschirrspülmaschine
US4730630A (en) * 1986-10-27 1988-03-15 White Consolidated Industries, Inc. Dishwasher with power filtered rinse
IT1216592B (it) * 1988-04-18 1990-03-08 Candy Ind Spa Macchina lavastoviglie perfezionata.
FR2651427B1 (fr) * 1989-09-05 1994-05-27 Esswein Sa Lave-vaisselle a alimentation silencieuse en eau.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7044916U (de) * Industrie A Zanussi Spa Wasserzuflußkolonne für die Spruharme einer Geschirrspulmaschine
DE3014663A1 (de) * 1980-04-16 1981-10-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum betreiben einer haushalt-geschirrspuelmaschine sowie derartige maschine zur durchfuehrung des verfahrens
DE8806160U1 (de) * 1988-05-09 1988-11-03 Rapp, Helmut, 8126 Hohenpeißenberg Spülmaschine mit einem in den Spülraum einführbaren Träger für das Spülgut

Also Published As

Publication number Publication date
ITMI941602A1 (it) 1996-01-27
DE69523519T2 (de) 2002-05-08
ITMI941602A0 (it) 1994-07-27
EP0697188A1 (fr) 1996-02-21
DE69523519D1 (de) 2001-12-06
EP0697188B2 (fr) 2005-02-09
IT1274298B (it) 1997-07-17
DE69523519T3 (de) 2005-08-04

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