EP1586265A1 - Lave-vaisselle avec circuit hydraulique amelioré - Google Patents

Lave-vaisselle avec circuit hydraulique amelioré Download PDF

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Publication number
EP1586265A1
EP1586265A1 EP04425055A EP04425055A EP1586265A1 EP 1586265 A1 EP1586265 A1 EP 1586265A1 EP 04425055 A EP04425055 A EP 04425055A EP 04425055 A EP04425055 A EP 04425055A EP 1586265 A1 EP1586265 A1 EP 1586265A1
Authority
EP
European Patent Office
Prior art keywords
washing
dishwasher
pumps
hydraulic circuit
suction duct
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.)
Withdrawn
Application number
EP04425055A
Other languages
German (de)
English (en)
Inventor
Marco Righetti
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.)
Bonferraro SpA
Original Assignee
Bonferraro SpA
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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP04425055A priority Critical patent/EP1586265A1/fr
Publication of EP1586265A1 publication Critical patent/EP1586265A1/fr
Withdrawn legal-status Critical Current

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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
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • 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
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the present invention relates to dishwashers, and in particular to a dishwasher provided with a washing pump for each sprinkler.
  • This type of program is usually obtained through a single-delivery washing pump and a flow distribution valve controlled by the control unit of the machine to direct the water flow to the upper or lower sprinkler.
  • This conventional arrangement has various drawbacks both in manufacturing and using the machine.
  • said flow distribution valve introduces in the hydraulic circuit great flow resistances that prevent the use of washing pumps of lower power with respect to machines with conventional simultaneous washing on both racks. It is known, in fact, that the power required in a hydraulic circuit is given by the product of flow rate by pressure, whereby once the water outflow pressure at the sprinklers (required to achieve good washing results) is determined it is clear that a decrease in flow rate should result in a corresponding decrease in the required power.
  • a second drawback stems from the fact that such a valve requires a "closed loop” control in that it is necessary to know the position of the flow distributor for a correct operation of the machine. Therefore this implies a greater complexity of the electronic control unit with respect to the management of the usual devices contained in a dishwasher (electrovalves, heating resistance, etc.) that are controlled in an "open loop” manner.
  • Another alternative is a double-delivery pump with two valves that independently control the supply to the two sprinklers.
  • the presence of two valves and of a double-delivery pump implies an increase in bulkiness, a further increase in the machine manufacturing cost, as well as a further decrease in reliability since both the hydraulic circuit and the electronic control unit are even more complicated.
  • the object of the present invention is to provide a dishwasher which overcomes the above-mentioned drawbacks. This object is achieved by means of a dishwasher with two washing pumps each being directly connected to a sprinkler.
  • the main advantage of the dishwasher according to the present invention is exactly that of allowing to dispense with the valve(s) to control the supply to the two hydraulic circuits of the two sprinklers. This results in a greater efficiency of the hydraulic circuit that has much lower flow resistance, thanks to the simplified lay-out.
  • Another important advantage is that of being able to use less powerful synchronous pumps, that are less bulky and more reliable than the usually employed asynchronous pumps.
  • Still another advantage stems from the fact of allowing the user to choose between the alternate wash and the conventional wash on both racks simultaneously, so as to be able to reduce the length of the washing cycle.
  • a global advantage of this dishwasher is therefore that of achieving the above-mentioned functionality through a very simple and cheap structure, with positive results as to cost and reliability.
  • a dishwasher conventionally includes an upper sprinkler A and a lower sprinkler B, that receive water through respective delivery pipes F, G.
  • a collecting sump C On the bottom of the tank there is arranged a collecting sump C, a suction duct D branching out from the bottom of the latter and passing through a heating member E.
  • the novel aspect of the present dishwasher is the presence of a connector H that connects duct D to two washing pumps PL1, PL2 that pump water directly into pipes F, G respectively.
  • the size and shape of the various connecting piping D, F, G, H are designed to reduce to a minimum the flow resistances optimizing the hydraulic circuit. Such an optimization allows to use as washing pumps PL1, PL2 synchronous pumps similar to those already used in conventional dishwashers as drain pump (indicated by I).
  • pumps PL1, PL2 can be controlled through an "open loop" same as all other actuators present in a dishwasher, thus achieving a reduction in complexity and cost of the electronic control unit. Finally, with this type of control it is even possible to use electromechanical timers, which is impossible in known arrangements.
  • the improvement as to length reduction is obtained not only for the normal washing cycles but also for the "standard” cycle: in fact it is possible to use the alternate washing mode only in those phases (heating) when due to energy saving a small amount of water is inside the dishwasher. On the contrary, in the "cold” phases it is possible to use the conventional washing mode, thus reducing the length of these phases without affecting the effectiveness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP04425055A 2004-01-29 2004-01-29 Lave-vaisselle avec circuit hydraulique amelioré Withdrawn EP1586265A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425055A EP1586265A1 (fr) 2004-01-29 2004-01-29 Lave-vaisselle avec circuit hydraulique amelioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425055A EP1586265A1 (fr) 2004-01-29 2004-01-29 Lave-vaisselle avec circuit hydraulique amelioré

Publications (1)

Publication Number Publication Date
EP1586265A1 true EP1586265A1 (fr) 2005-10-19

Family

ID=34932432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425055A Withdrawn EP1586265A1 (fr) 2004-01-29 2004-01-29 Lave-vaisselle avec circuit hydraulique amelioré

Country Status (1)

Country Link
EP (1) EP1586265A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813182A1 (fr) * 2006-01-30 2007-08-01 Bonferraro S.p.A. Lave-vaisselle avec circuit hydraulique amelioré
RU2454918C2 (ru) * 2007-06-29 2012-07-10 Бсх Бош Унд Сименс Хаусгерете Гмбх Посудомоечная машина с насосом с бесщеточным двигателем с постоянным магнитом
EP1992269A3 (fr) * 2007-05-16 2013-09-04 Premark FEG L.L.C. Pompe d'administration double pour appareil domestique électrique et appareil domestique électrique équipé de celle-ci
WO2013111170A3 (fr) * 2012-01-27 2014-01-03 Dihr Ali S.P.A. Lave-vaisselle professionnel ergonomique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704082A (en) * 1950-05-16 1955-03-15 Helen G Jackson Dishwashing machine
CH398906A (de) * 1960-04-26 1966-03-15 Siemens Elektrogeraete Gmbh Geschirrspülmaschine
DE2304035A1 (de) * 1973-01-27 1974-08-01 Miele & Cie Geschirrspuelmaschine mit einem oberen und einem unteren sprueharm
DE2442619A1 (de) * 1974-09-05 1975-09-25 Winterhalter Kg Karl Maschine zum spuelen von geschirr
DE3911305A1 (de) * 1988-04-18 1989-10-26 Candy Ind Spa Geschirrspuelmaschine
EP0601220A1 (fr) * 1992-11-30 1994-06-15 Siemens Aktiengesellschaft Système de pompe hydraulique, en particulier pompe de vidage de liquides
EP1004266A1 (fr) * 1998-10-28 2000-05-31 SMEG S.p.A. Lave-vaisselle avec cycle de préchauffage
EP1046369A1 (fr) * 1999-04-22 2000-10-25 BSH Bosch und Siemens Hausgeräte GmbH Soupape à deux voies pour un appareil ménager de conduisant du liquide
EP1279836A1 (fr) * 2001-07-26 2003-01-29 Bonferraro S.p.A. Pompe centrifuge réversible avec refoulement doublé

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704082A (en) * 1950-05-16 1955-03-15 Helen G Jackson Dishwashing machine
CH398906A (de) * 1960-04-26 1966-03-15 Siemens Elektrogeraete Gmbh Geschirrspülmaschine
DE2304035A1 (de) * 1973-01-27 1974-08-01 Miele & Cie Geschirrspuelmaschine mit einem oberen und einem unteren sprueharm
DE2442619A1 (de) * 1974-09-05 1975-09-25 Winterhalter Kg Karl Maschine zum spuelen von geschirr
DE3911305A1 (de) * 1988-04-18 1989-10-26 Candy Ind Spa Geschirrspuelmaschine
EP0601220A1 (fr) * 1992-11-30 1994-06-15 Siemens Aktiengesellschaft Système de pompe hydraulique, en particulier pompe de vidage de liquides
EP1004266A1 (fr) * 1998-10-28 2000-05-31 SMEG S.p.A. Lave-vaisselle avec cycle de préchauffage
EP1046369A1 (fr) * 1999-04-22 2000-10-25 BSH Bosch und Siemens Hausgeräte GmbH Soupape à deux voies pour un appareil ménager de conduisant du liquide
EP1279836A1 (fr) * 2001-07-26 2003-01-29 Bonferraro S.p.A. Pompe centrifuge réversible avec refoulement doublé

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813182A1 (fr) * 2006-01-30 2007-08-01 Bonferraro S.p.A. Lave-vaisselle avec circuit hydraulique amelioré
EP1992269A3 (fr) * 2007-05-16 2013-09-04 Premark FEG L.L.C. Pompe d'administration double pour appareil domestique électrique et appareil domestique électrique équipé de celle-ci
RU2454918C2 (ru) * 2007-06-29 2012-07-10 Бсх Бош Унд Сименс Хаусгерете Гмбх Посудомоечная машина с насосом с бесщеточным двигателем с постоянным магнитом
US8603261B2 (en) 2007-06-29 2013-12-10 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwashing machine with a pump with a brushless permanent magnet motor
WO2013111170A3 (fr) * 2012-01-27 2014-01-03 Dihr Ali S.P.A. Lave-vaisselle professionnel ergonomique

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