EP0697188A1 - Waschwasserzufuhrkontrolle für Sprüharme einer Geschirrspülmaschine - Google Patents

Waschwasserzufuhrkontrolle für Sprüharme einer Geschirrspülmaschine Download PDF

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Publication number
EP0697188A1
EP0697188A1 EP95201934A EP95201934A EP0697188A1 EP 0697188 A1 EP0697188 A1 EP 0697188A1 EP 95201934 A EP95201934 A EP 95201934A EP 95201934 A EP95201934 A EP 95201934A EP 0697188 A1 EP0697188 A1 EP 0697188A1
Authority
EP
European Patent Office
Prior art keywords
conduit
outlet conduit
spraying
flow
control device
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
EP95201934A
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English (en)
French (fr)
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EP0697188B2 (de
EP0697188B1 (de
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
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Candy SpA
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Publication date
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Application filed by Candy SpA filed Critical Candy SpA
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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.
  • 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.
  • a device for controlling the flow of washing liquid for feeding a first spraying rotor and a second spraying rotor of a dishwasher comprising an inlet conduit connected to means for pumping the washing liquid, and at least a first outlet conduit and a second outlet conduit respectively connected to said first and second spraying rotors, characterised in that it comprises first means for cutting off the flow of liquid, which means being associated with said first outlet conduit to control its opening and closure independently of the condition of the second outlet conduit.
  • 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 semi cylindrical 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.
  • FIGS 8-11 show a third embodiment of the device according to the invention.
  • This device differs from the previous two due to the fact that, in addition to the possibility of interrupting feeding of water to the lower rotor 4, it allows feeding of water to both rotors to be interrupted.
  • the outlet conduit 5 of the pump 3 flows into a chamber 33 which extends above to form a cylindrical and tubular appendage 34.
  • a baffle 35 divides this tubular appendage 34 into two semicylindrical conduits 38 and 39.
  • the latter extend inside the chamber 33, where they have widened mouths 40 and 41 above two respective plugs 42 and 43 moving independently under the control of respective actuators 44 and 45, between a position of opening and one of closure of the mouth of the respective semicylindrical conduits 38 and 39.
  • a flow diverter 46 Fitted and sealed on the tubular appendage 34, as in the case in Figure 2, is a flow diverter 46 wherein a baffle 47 defines two semicylindrical conduits 48 and 49.
  • the baffle 47 is tilted above to join the conduit 49 to the cylindrical conduit 20 for feeding the upper rotor 4'.
  • conduits 51 and 52 which, when the plug 43 is in the position of opening of the semi cylindrical conduit 39 (Figs. 8 and 10), are closed, and are opened when the plug 43 is brought by the actuator 45 into the position of closure of the mouth 41 of the semicylindrical conduit 39 (Fig. 11).
  • these conduits 51 and 52 allow liquid to be sent to the microfilter and to a recovery tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP95201934A 1994-07-27 1995-07-13 Waschwasserzufuhrkontrolle für Sprüharme einer Geschirrspülmaschine Expired - Lifetime EP0697188B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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
ITMI941602 1994-07-27

Publications (3)

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

Family

ID=11369375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95201934A Expired - Lifetime EP0697188B2 (de) 1994-07-27 1995-07-13 Waschwasserzufuhrkontrolle für Sprüharme einer Geschirrspülmaschine

Country Status (3)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033720A2 (de) * 1998-12-10 2000-06-15 BSH Bosch und Siemens Hausgeräte GmbH Haushalt-geschirrspülmaschine
EP1042982A1 (de) * 1999-03-30 2000-10-11 Whirlpool Corporation Geschirrspülmaschine mit oberem und unterem Sprüharm
EP1728461A1 (de) * 2005-06-01 2006-12-06 Coprecitec, S.L. Haushalts-Geschirrspülmaschine mit einer Wasserverteilungskammer

Citations (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
FR2457670A3 (fr) * 1979-06-01 1980-12-26 Licentia Gmbh Lave-vaisselle silencieux et exempt de vibrations
DE3406698A1 (de) * 1984-02-24 1985-08-29 Buderus Ag, 6330 Wetzlar Umschaltvorrichtung fuer eine geschirrspuelmaschine
DE3441023A1 (de) * 1984-11-09 1986-05-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kreiselpumpe fuer eine geschirrspuelmaschine
US4730630A (en) * 1986-10-27 1988-03-15 White Consolidated Industries, Inc. Dishwasher with power filtered rinse
DE3911305A1 (de) * 1988-04-18 1989-10-26 Candy Ind Spa Geschirrspuelmaschine
FR2651427A1 (fr) * 1989-09-05 1991-03-08 Esswein Sa Lave-vaisselle a alimentation silencieuse en eau.

Family Cites Families (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
DE3014663C2 (de) * 1980-04-16 1983-11-17 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Haushalt-Geschirrspülmaschine
DE8806160U1 (de) * 1988-05-09 1988-11-03 Rapp, Helmut, 8126 Hohenpeißenberg Spülmaschine mit einem in den Spülraum einführbaren Träger für das Spülgut

Patent Citations (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
FR2457670A3 (fr) * 1979-06-01 1980-12-26 Licentia Gmbh Lave-vaisselle silencieux et exempt de vibrations
DE3406698A1 (de) * 1984-02-24 1985-08-29 Buderus Ag, 6330 Wetzlar Umschaltvorrichtung fuer eine geschirrspuelmaschine
DE3441023A1 (de) * 1984-11-09 1986-05-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kreiselpumpe fuer eine geschirrspuelmaschine
US4730630A (en) * 1986-10-27 1988-03-15 White Consolidated Industries, Inc. Dishwasher with power filtered rinse
DE3911305A1 (de) * 1988-04-18 1989-10-26 Candy Ind Spa Geschirrspuelmaschine
FR2651427A1 (fr) * 1989-09-05 1991-03-08 Esswein Sa Lave-vaisselle a alimentation silencieuse en eau.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033720A2 (de) * 1998-12-10 2000-06-15 BSH Bosch und Siemens Hausgeräte GmbH Haushalt-geschirrspülmaschine
WO2000033720A3 (de) * 1998-12-10 2000-10-12 Bsh Bosch Siemens Hausgeraete Haushalt-geschirrspülmaschine
EP1042982A1 (de) * 1999-03-30 2000-10-11 Whirlpool Corporation Geschirrspülmaschine mit oberem und unterem Sprüharm
DE19914359A1 (de) * 1999-03-30 2000-10-12 Whirlpool Co Geschirrspülmaschine mit oberem und unterem Sprüharm
DE19914359C2 (de) * 1999-03-30 2002-07-18 Whirlpool Co Geschirrspülmaschine mit oberem und unterem Sprüharm
DE19914359C5 (de) * 1999-03-30 2006-01-05 Whirlpool Corp., Benton Harbor Geschirrspülmaschine mit oberem und unterem Sprüharm
EP1728461A1 (de) * 2005-06-01 2006-12-06 Coprecitec, S.L. Haushalts-Geschirrspülmaschine mit einer Wasserverteilungskammer

Also Published As

Publication number Publication date
DE69523519D1 (de) 2001-12-06
IT1274298B (it) 1997-07-17
ITMI941602A1 (it) 1996-01-27
EP0697188B2 (de) 2005-02-09
DE69523519T2 (de) 2002-05-08
DE69523519T3 (de) 2005-08-04
ITMI941602A0 (it) 1994-07-27
EP0697188B1 (de) 2001-10-31

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