EP1352605A1 - Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant - Google Patents

Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant Download PDF

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Publication number
EP1352605A1
EP1352605A1 EP02425201A EP02425201A EP1352605A1 EP 1352605 A1 EP1352605 A1 EP 1352605A1 EP 02425201 A EP02425201 A EP 02425201A EP 02425201 A EP02425201 A EP 02425201A EP 1352605 A1 EP1352605 A1 EP 1352605A1
Authority
EP
European Patent Office
Prior art keywords
water
sump
unit
heating
electrovalve
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Withdrawn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
EP02425201A
Other languages
German (de)
English (en)
Inventor
Ezio Gobbi
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 EP02425201A priority Critical patent/EP1352605A1/fr
Publication of EP1352605A1 publication Critical patent/EP1352605A1/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Withdrawn legal-status Critical Current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
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0044—Operation time reduction
    • 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
    • A47L15/4285—Water-heater arrangements
    • 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
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • A47L15/42—Details
    • A47L15/4229—Water softening arrangements
    • A47L15/4231—Constructional details of the salt container or the ion exchanger
    • 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
    • A47L2301/00—Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/06—Water supply, circulation or discharge information
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/06—Water heaters

Definitions

  • the present invention relates to dishwashing machines, and in particular to a dishwasher for domestic use provided with means to shorten the times of the operating cycle.
  • dishwashers intended to be connected to the hot water hydraulic network, but this is a significant limitation and reduces the overall energetic efficiency anyway since the water is heated in another place and then supplied to the dishwasher with an unavoidable loss of heat along the path.
  • the preferred arrangement is that of heating the water directly in the dishwasher at the beginning of the washing cycle, and then again during the cycle in order to keep the water at the required temperature.
  • the initial heating step contributes to the prolonging of the overall length of the cycle which sometimes the user might wish to shorten in order to have the clean dishes available sooner and/or to be able to carry out sooner the washing of another load of dishes.
  • Some types of dishwasher allow to shorten the length of the washing cycle by carrying out a pre-heating cycle prior to the loading of the dishes.
  • the dishwasher when the dishwasher is still empty, the water is loaded and initially heated by activating the washing pump and sprinkling the water through the sprinklers until the desired temperature is reached.
  • the dishwasher indicates to the user that the water has reached the set temperature, then he can load the dishes and start the real washing cycle.
  • EP-1004266 discloses a dishwasher including valve means suitable to interrupt the water delivery from the pump to the sprinklers as well as a recirculation duct connecting the pump to the collecting sump. In this way during the pre-heating it is possible to circulate the water only between the pump and the sump, thus preventing its dispersion throughout the machine.
  • This arrangement of the dishwasher allows to carry out the pre-heating cycle in a shorter time and with a lower consumption of water and electric power. Furthermore, by restricting to the tank bottom the spread of hot water, the user does not run any risk of burn and a greater "thermal inertia" of the machine is achieved, which reduces the decrease in temperature of the water in case the user does not immediately start the washing cycle.
  • the object of the present invention is to provide a dishwasher suitable to overcome the above-mentioned drawbacks and a relevant operating cycle which takes advantage of the features of this dishwasher.
  • the main advantage of the dishwasher according to the present invention is exactly that of being able to heat the water in an independent and parallel process with respect to the normal operation of the machine.
  • the pre-heating can be carried out even while the user is loading the dishwasher, the heating for the second rinse can be carried out while the machine is performing the washing and/or the first rinse and so on.
  • a second significant advantage of this dishwasher is that it can still operate in standard mode, in that the user may decide to set it so as to bypass the additional components and carry out a conventional cycle with a slow heating directly in the tank.
  • a further advantage of this type of machine stems from the fact that in case of consecutive operating cycles there is a partial overlapping of one cycle with another, whereby the overall length of two consecutive cycles is shorter than the sum of the lengths of two single cycles.
  • a dishwasher conventionally includes a plurality of known elements: an electrovalve VN controlling the entrance of water from the network, a collecting sump formed on the tank bottom which receives the water through a supply duct L, the level being controlled by a pressure switch P, a drain pump D to drain water from the sump and a wash pump W which receives the water from the sump and through respective ducts feeds it to the top and bottom sprinklers.
  • a unit for softening the water by means of decalcifying resins located in a container R, which includes a chamber A for the collection of water intended for the regeneration of said resins by means of a sodium chloride solution which is formed in the salt container S, which is connected to container R through an electrovalve VR.
  • the novel aspect of the dishwasher according to the present invention consists of a plurality of additional elements which allow to achieve the shortening of the length of the operating cycle as previously mentioned.
  • said elements consist of a parallel water heating unit and of suitable valve means controlling the water flow to and from said unit, as well as relevant detecting and measuring means to manage the operation thereof.
  • the core of the heating unit is an accumulator Q provided with an inlet E, to which there is connected a supply duct M, which carries the water to the top of accumulator Q, as well as with two bottom outlets which enter a connecting duct K to the sump.
  • a first outlet G is free and receives the water coming from an overflow X located at the same height as the mouth of inlet E, whereas the second outlet is controlled by an electrovalve VS.
  • Accumulator Q is also provided with a temperature sensor T, a breather Y connected to the tank to let off air and vapour, and a plurality of substantially horizontal ribs U arranged at different heights and horizontal positions.
  • a heating member H e.g. PTF resistor, heating cable
  • accumulator Q is located in a side wall of the machine between the outer casing O and the heating member H, which is separated from tank I by a soundproofing panel Z.
  • ribs U whose purpose is to limit the convective movements of the water to restricted areas, in order to prevent situations of excessive temperature stratification in the accumulator which could lead to differences of even 10°C between the top and bottom thereof.
  • the supply of water to said parallel unit is controlled by a deviating electrovalve VD, arranged between the softening unit and the sump, which can direct the flow directly to the sump through duct L or to accumulator Q through duct M.
  • a meter F preferably just downstream from electrovalve VN, suitable to measure the amount of water entering the machine.
  • the dishwasher can operate in standard mode simply by keeping valve VD set on duct L, so as to bypass accumulator Q.
  • the dishwasher uses the additional elements to decrease the cycle length as explained in the following non-limiting example of a normal cycle at 65°C without pre-wash.
  • valve VN is opened and water flowing through inlet C fills chamber A until it overflows and goes out through outlet J into container R.
  • the water finds valve VD set on duct L and enters the sump from where it is instantly drained by the drain pump D.
  • the following step is the loading and pre-heating of the water which still passes through chamber A, outlet J and container R but then finds valve VD set on duct M and fills accumulator Q through inlet E.
  • the amount of water loaded in the machine is controlled through meter F, and the water possibly in excess enters the tank through overflow X, outlet G and duct K.
  • the microprocessor orders the activation of heater H only upon receipt of the confirmation of the amount of water measured by meter F and of the non-activation of the pressure switch P. It should be noted that if meter F does not indicate the correct amount (or it fails) and/or the pressure switch P detects the presence of water in the sump when there should not be any, then an alarm signal is triggered to inform the user that the machine can not operate in short-cycle mode, but it can still operate in standard mode.
  • the heater H operates until sensor T detects the reaching of the desired temperature (e.g. 50°C), and its position between the accumulator and the tank not only causes the heating of the water inside accumulator Q but also of the whole side wall of the tank so as to decrease the heating time in the subsequent washing step.
  • the desired temperature e.g. 50°C
  • the real washing cycle may start with a loading step of the water into the tank, by opening valve VS, a further heating to 65°C and the simultaneous activation of the wash pump W.
  • this step the water which is already at about 50°C quickly reaches the 65°C temperature and therefore a decrease of about 10 minutes of the required time is achieved with respect to the standard cycle in which cold water (e.g. at 15°C) is introduced in the tank.
  • cold water e.g. at 15°C
  • the loading of water in the accumulator and its heating to 50°C is carried out again.
  • valves VN and VS are simultaneously opening so as to obtain a rinse with lukewarm water. More specifically, the water reaches duct K through both valve VS and overflow X plus outlet G since the incoming flow rate from the network is greater than the outgoing flow rate from the accumulator. Furthermore, valve VN is closed some seconds later with respect to valve VS in order to assure the filling of the accumulator for the following heating.
  • the machine operates then in parallel again and, while the first rinse is being carried out, the water in the accumulator is restored to 50°C in a few minutes starting from the temperature of 35-38°C to which it has dropped due to the mixing with the cold water coming from the network.
  • the water in the accumulator is already almost at the required temperature when the water of the first rinse is drained and up comes the second rinse with hot water which is loaded in the tank from the accumulator, always by opening valve VS.
  • the further heating to 68°C is thus performed quickly and a decrease of about 12 minutes of the required time is achieved with respect to the standard cycle in which cold water is introduced in the tank. This decrease is even greater than in the first washing step since also the first rinse with lukewarm water contributes to maintaining the internal machine temperature higher and therefore to shortening the following heating time.
  • the operating cycle provides the resin regeneration step, by opening valve VR so that the water flows down from chamber A through outlet B into the salt container S and from there the sodium chloride solution passes to container R.
  • valve VR so that the water flows down from chamber A through outlet B into the salt container S and from there the sodium chloride solution passes to container R.
  • VD set on duct L for the introduction in the sump and the drain so as to prevent the contamination of the accumulation circuit with water having a high saline concentration.
  • the cycle is completed by the drying step which can be used, together with the two previous steps, to prepare the machine for a subsequent operating cycle if the user so wishes.
  • the above-described and illustrated embodiment of the dishwasher according to the invention is just an example susceptible of various modifications.
  • the shape and position of accumulator Q may be changed and the water heating may be performed by a heater of different kind or placed in a different position with respect to the illustrated heater H, or by more than one heater.
  • meter F may be arranged at other positions (e.g. downstream from the softening unit) and its function of controlling the accumulator filling may be achieved also through other means such as an indicator of the level inside the accumulator itself.
EP02425201A 2002-04-02 2002-04-02 Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant Withdrawn EP1352605A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02425201A EP1352605A1 (fr) 2002-04-02 2002-04-02 Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425201A EP1352605A1 (fr) 2002-04-02 2002-04-02 Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant

Publications (1)

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EP1352605A1 true EP1352605A1 (fr) 2003-10-15

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EP02425201A Withdrawn EP1352605A1 (fr) 2002-04-02 2002-04-02 Lave-vaisselle avec moyens pour fonctionnement en cycle court et cycle opératoire correspondant

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2009408A2 (fr) 2007-06-29 2008-12-31 Premark FEG L.L.C. Dispositif de détection du niveau de liquide dans le réservoir d'un appareil domestique électrique
WO2016108791A1 (fr) * 2014-12-30 2016-07-07 Arcelik Anonim Sirketi Lave-vaisselle
EP3162268A1 (fr) * 2015-10-26 2017-05-03 BSH Hausgeräte GmbH Appareil ménager à circulation d'eau et procédé pour le faire fonctionner
US9839945B2 (en) 2014-05-02 2017-12-12 Electrolux Home Products, Inc. Methods, systems, and apparatuses for performing a quick cycle in a dishwasher
US9936852B2 (en) 2010-03-18 2018-04-10 Electrolux Home Products Corporation N.V. Method for filling a wash tub of a dishwasher with water
WO2019234040A1 (fr) * 2018-06-07 2019-12-12 BSH Hausgeräte GmbH Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique
EP4226837A1 (fr) * 2022-02-11 2023-08-16 Whirlpool Corporation Lave-vaisselle à alimentation en eau directe
WO2024078710A1 (fr) * 2022-10-12 2024-04-18 Electrolux Appliances Aktiebolag Machine de traitement d'articles avec ensemble réservoir

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086037A1 (fr) * 1982-01-14 1983-08-17 Clayton, Dan Trevor Machine à laver la vaisselle
EP0165139A1 (fr) * 1984-05-18 1985-12-18 Rémi Blanc Machine à laver la vaisselle
DE4238450A1 (de) * 1992-11-13 1994-05-19 Bosch Siemens Hausgeraete Programmgesteuerte Haushalt-Geschirrspülmaschine
JPH0759707A (ja) * 1993-08-30 1995-03-07 Matsushita Electric Ind Co Ltd 食器洗い機
WO1998008428A1 (fr) * 1996-08-30 1998-03-05 Gs Development Ab Technique applicable au dernier rinçage en lave-vaisselle
EP1004266A1 (fr) * 1998-10-28 2000-05-31 SMEG S.p.A. Lave-vaisselle avec cycle de préchauffage
DE19855779A1 (de) * 1998-12-03 2000-06-08 Miele & Cie Verfahren zum Erwärmen der Spülflüssigkeit eines wasserführenden Haushaltgerätes, insbesondere einer programmgesteuerten Geschirrspülmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086037A1 (fr) * 1982-01-14 1983-08-17 Clayton, Dan Trevor Machine à laver la vaisselle
EP0165139A1 (fr) * 1984-05-18 1985-12-18 Rémi Blanc Machine à laver la vaisselle
DE4238450A1 (de) * 1992-11-13 1994-05-19 Bosch Siemens Hausgeraete Programmgesteuerte Haushalt-Geschirrspülmaschine
JPH0759707A (ja) * 1993-08-30 1995-03-07 Matsushita Electric Ind Co Ltd 食器洗い機
WO1998008428A1 (fr) * 1996-08-30 1998-03-05 Gs Development Ab Technique applicable au dernier rinçage en lave-vaisselle
EP1004266A1 (fr) * 1998-10-28 2000-05-31 SMEG S.p.A. Lave-vaisselle avec cycle de préchauffage
DE19855779A1 (de) * 1998-12-03 2000-06-08 Miele & Cie Verfahren zum Erwärmen der Spülflüssigkeit eines wasserführenden Haushaltgerätes, insbesondere einer programmgesteuerten Geschirrspülmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 06 31 July 1995 (1995-07-31) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2009408A2 (fr) 2007-06-29 2008-12-31 Premark FEG L.L.C. Dispositif de détection du niveau de liquide dans le réservoir d'un appareil domestique électrique
US9936852B2 (en) 2010-03-18 2018-04-10 Electrolux Home Products Corporation N.V. Method for filling a wash tub of a dishwasher with water
US9839945B2 (en) 2014-05-02 2017-12-12 Electrolux Home Products, Inc. Methods, systems, and apparatuses for performing a quick cycle in a dishwasher
WO2016108791A1 (fr) * 2014-12-30 2016-07-07 Arcelik Anonim Sirketi Lave-vaisselle
EP3162268A1 (fr) * 2015-10-26 2017-05-03 BSH Hausgeräte GmbH Appareil ménager à circulation d'eau et procédé pour le faire fonctionner
WO2019234040A1 (fr) * 2018-06-07 2019-12-12 BSH Hausgeräte GmbH Lave-vaisselle, procédé de fonctionnement d'un lave-vaisselle et produit program informatique
CN112236066A (zh) * 2018-06-07 2021-01-15 Bsh家用电器有限公司 洗碗机、用于运行洗碗机的方法和计算机程序产品
US20210235963A1 (en) * 2018-06-07 2021-08-05 BSH Hausgeräte GmbH Dishwasher, method for operating a dishwasher, and computer program product
EP4226837A1 (fr) * 2022-02-11 2023-08-16 Whirlpool Corporation Lave-vaisselle à alimentation en eau directe
WO2024078710A1 (fr) * 2022-10-12 2024-04-18 Electrolux Appliances Aktiebolag Machine de traitement d'articles avec ensemble réservoir

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