EP2740396A1 - Verfahren zum Betreiben eines Geschirrspülers - Google Patents

Verfahren zum Betreiben eines Geschirrspülers Download PDF

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Publication number
EP2740396A1
EP2740396A1 EP12425196.8A EP12425196A EP2740396A1 EP 2740396 A1 EP2740396 A1 EP 2740396A1 EP 12425196 A EP12425196 A EP 12425196A EP 2740396 A1 EP2740396 A1 EP 2740396A1
Authority
EP
European Patent Office
Prior art keywords
rpm
rpm value
motor
circulation pump
value
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Withdrawn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
EP12425196.8A
Other languages
English (en)
French (fr)
Inventor
Aldo 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
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 Candy SpA filed Critical Candy SpA
Priority to EP12425196.8A priority Critical patent/EP2740396A1/de
Priority to CN201310659789.7A priority patent/CN103860122B/zh
Publication of EP2740396A1 publication Critical patent/EP2740396A1/de
Withdrawn legal-status Critical Current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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0026—Rinsing phases
    • 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
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0028—Washing phases
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the present invention relates to a method of operating a dishwasher.
  • Dishwashers comprise a washing chamber usually with two dish racks disposed therein, one above the other.
  • One or a pair of spray devices usually having two arms adapted to rotate about a common axis of rotation, with a plurality of nozzles thereon, spray a washing liquid on the dish racks, and hence on dishware.
  • the spray devices are rotated by the washing liquid delivered by the nozzles, which imparts angular momenta to the two arms, thereby causing them to rotate about the axis of rotation.
  • Certain dishwashers use one (or more) auxiliary spray devices, in addition to the above mentioned main spray devices.
  • auxiliary spray device is usually located in the washing chamber below the rack for pots and pans, such that pots and pans or any larger dishware may be more intensively sprayed with the washing liquid.
  • auxiliary spray devices also equipped with spray nozzles, rotate (usually about an axis of rotation other than that of the main spray devices) and their rotation is ensured, as for the main spray devices, by the washing liquid delivered by the nozzles, which imparts angular momenta and cause rotation of the auxiliary spray device.
  • auxiliary spray devices have been appreciated by consumers, as they provide a more intensive cleaning action on dishware, such as pots and pans, which sometimes are soiled with hard-to-remove food residues.
  • This the present invention has the object of providing a method of operating a dishwasher that allows the use of auxiliary spray devices without requiring an increase of the power rate of the motor-driven circulation pump.
  • the operation method of the present invention is applicable to a dishwasher of the type comprising a motor-driven circulation pump, at least one, preferably two, main spray devices and at least one auxiliary spray device.
  • the motor-driven pump is selectively placed in fluid communication with the spray devices, i.e. may be placed in fluid communication with all the spray devices or only with the main ones (depending on the desired operating cycle).
  • the method includes the execution of a washing cycle CL in which the motor-driven circulation pump feeds the main spray device and the auxiliary spray device.
  • the washing cycle CL comprises a first operating period PL1 and a second operating period PL2 of the motor-driven pump, where in the first operating period PL1 the motor-driven pump is operated to rotate at a first rpm value R1 and a second rpm value R2, with a pulsed operation alternating the first rpm value R1 and the second rpm value R2 (see Figure 1 , in which the x-axis is representative of time and the y-axis is representatives of the rpm of the motor-driven pump) In the second operating period PL2, the motor-driven pump is operated to constantly rotate at a third rpm value R3, higher than the first rpm value R1 and lower than the second rpm value R2. It shall be noted that the rpm of the motor-driven pump is directly proportional to its delivery rate.
  • pulsed operation alternating the first rpm P1 and the second rpm value R2 as used herein is intended to designate an operation of the motor-driven pump in which the latter rotates at the first rpm value R1, then at the second rpm value R2, then again at the first rpm value R1 and so on, as schematically shown in Figure 2 . If transients from the first rpm value R1 to the second rpm value R2 and vice versa, which are very short, are neglected, them the alternate pulsed operation is of the square wave type (as schematically shown in the figures).
  • the rpm of the motor-driven pump is adjusted by acting upon the electric motor of the pump, i.e. by changing voltage or current supplied thereto.
  • the second rpm value R2 at which the motor-driven pump is operated is such that the electric motor of the pump runs at its highest power or even above its maximum rated power. This will provide a useful flow for operation of all spray devices.
  • the alternate pulsed operation in the first operating period PL1 allows the spray devices to be fed with an adequate flow rate and avoids damages to the electric motor of the pump.
  • motor-driven pumps as used in conventional dishwashers i.e. with no auxiliary spray device
  • dishwashers having auxiliary spray devices will be also usable in dishwashers having auxiliary spray devices.
  • the third rpm value R3 at which the motor-driven pump is operated is also such that the electric motor of the pump runs at its highest power or even above its maximum rated power.
  • the duration T2 of the second operating period PL2 is limited to a value that is lower than the maximum operating time of the electric motor of the pump prior to its being damaged.
  • the first operating period PL1 of the washing cycle CL has a duration T1 longer than the duration T2 of the second operating period PL2.
  • the duration T2 of the second operating period PL2 of the washing cycle CL is less than 1000 seconds, preferably ranges from 400 to 700 seconds, and more preferably is about 600 seconds.
  • the pulsed operation alternating the first rpm value R1 and the second rpm value R2 of the motor-driven pump comprises periodically repeating sequences S (see Figure 2 ).
  • Each sequence S comprises an initial pulse IP and a final pulse FP, in which the rpm of the motor-driven pump is equal to the second rpm value R2.
  • the initial pulse IP and the final pulse FP have the same duration t1 and are separated by an interval of predetermined length.
  • Each sequence S further comprises a middle pulse MP, in which the rpm of the motor-driven pump is equal to the second rpm value R2.
  • the middle pulse is operative in the interval between the initial pulse IP and the final pulse FP.
  • the duration t2 of the middle pulse MP is shorter than the duration t1 of the initial IP and final FP pulses.
  • Each sequence S comprises a base B between two successive pulses, in which the rpm value of the motor-driven pump is equal to the first rpm value R1. Therefore, each sequence S comprises three pulses in which the motor-driven pump is operated at the second rpm value R2 and three bases in which the motor-driven pump is operated at the first rpm value R1.
  • the duration t3 of each base B is at least five times longer than the duration t1, t2 of a pulse.
  • each sequence S comprises an initial pulse IP having a duration t1 of about 0.5 seconds, followed by a base B having a duration t3 of about 4 seconds, followed by a middle pulse MP having a duration of about 0.3 seconds, followed by a base B having a duration t3 of about 3 seconds, followed by a final pulse FP having a duration of about 0.5 seconds, followed by a base B having a duration t3 of about 4 seconds.
  • the washing cycle CL is preceded by a pre-wash cycle CP, in which the motor-driven pump only feeds the main delivery device and is operated to constantly rotate at a fourth rpm value R4, higher than the first rpm value R1 and lower than the third rpm value R3.
  • the fourth rpm value R4 falls within the normal operation parameters of the motor-driven pump.
  • the pre-wash cycle CP has a duration that ranges from 500 to 1500 seconds, preferably from 700 to 1200 seconds, more preferably of about 950 seconds.
  • the washing cycle CL is followed by a cold rinse cycle CP, in which the motor-driven pump only feeds the main delivery device and is operated to constantly rotate at the fourth rpm value R4.
  • the cold rinse cycle CRF has a duration T3 that ranges from 800 to 1800 seconds, preferably from 900 to 1500 seconds, more preferably of about 1100 seconds.
  • the cold rinse cycle CRF is preferably divided into two identical sub-cycles PR1, PR2 with a liquid fill and drain step FCS therebetween.
  • the cold rinse cycle CRF is followed by a hot rinse cycle CRC, in which the motor-driven pump feeds all the spray devices (including the auxiliary spray device) and is operated to rotate at the first rpm value R1 and the second rpm value R2, with a pulsed operation alternating the first rpm value R1 and the second rpm value R2.
  • the hot rinse cycle CRC has a duration T4 that ranges from 800 to 1800 seconds, preferably from 900 to 1500 seconds, more preferably of about 1200 seconds.
  • a liquid fill and drain step FSC is provided between the above mentioned cycles CP, CL, CRF, CRC.
  • the average volumetric delivery rate of the motor-driven pump during its pulsed operation alternating the first rpm value R1 and the second rpm value R2 is substantially equal to the average volumetric delivery rate of the motor-driven pump during its operation at the fourth rpm value R4.
  • the flow rates/hour of the motor-driven pump in both the above operations are substantially identical.
  • the first rpm value R1 ranges from 2500 to 3800 rpm, preferably from 3000 to 3400 rpm, and is more preferably about 3240 rpm.
  • the second rpm value R2 ranges from 4500 to 5500 rpm, preferably from 4800 to 5200 rpm, and is more preferably about 5040 rpm.
  • the third rpm value R3 ranges from 4300 to 5200 rpm, preferably from 4600 to 5000 rpm, and is more preferably about 4860 rpm.
  • the fourth rpm value R4 ranges from 4000 to 5000 rpm, preferably from 4300 to 4700 rpm, and is more preferably about 4500 rpm.
  • the washing liquid e.g. water from the mains
  • undergoes heating starts at the start of the washing cycle CL and has a liquid hearing curve that increases in substantially linear fashion from ambient temperature (e.g. 20 °C) to a threshold temperature ranging from 60°C to 85°C, preferably about 73°C.
  • the threshold temperature is reached after about three quarters of the duration T1 of the first operating period PL1 of the motor-driven pump. Once the threshold temperature has been reached, the washing cycle is no longer heated during the washing cycle CL.
  • a similar heating step is carried out during the hot rinse cycle CRC.
  • the threshold temperature is reached at the end of the cycle.

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  • Washing And Drying Of Tableware (AREA)
EP12425196.8A 2012-12-10 2012-12-10 Verfahren zum Betreiben eines Geschirrspülers Withdrawn EP2740396A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12425196.8A EP2740396A1 (de) 2012-12-10 2012-12-10 Verfahren zum Betreiben eines Geschirrspülers
CN201310659789.7A CN103860122B (zh) 2012-12-10 2013-12-09 操作洗碗机的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12425196.8A EP2740396A1 (de) 2012-12-10 2012-12-10 Verfahren zum Betreiben eines Geschirrspülers

Publications (1)

Publication Number Publication Date
EP2740396A1 true EP2740396A1 (de) 2014-06-11

Family

ID=47721903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12425196.8A Withdrawn EP2740396A1 (de) 2012-12-10 2012-12-10 Verfahren zum Betreiben eines Geschirrspülers

Country Status (2)

Country Link
EP (1) EP2740396A1 (de)
CN (1) CN103860122B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108553060A (zh) * 2018-05-15 2018-09-21 李均辉 一种安全快捷洗碗装置
WO2023247080A1 (de) * 2022-06-23 2023-12-28 BSH Hausgeräte GmbH Spülverfahren mit diskontinuierlichem abgeben von spülflotte und geschirrspülmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659381A1 (de) * 1993-12-20 1995-06-28 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Betriebsverfahren für eine Geschirrspülmaschine
EP1219227A1 (de) * 2000-12-29 2002-07-03 BSH Bosch und Siemens Hausgeräte GmbH Steuerverfahren zum Steuern des elektrischen Antriebsmotors einer Pumpe auf verschiedene Drehzahlen
EP1669017A1 (de) * 2004-12-11 2006-06-14 Electrolux Home Products Corporation N.V. Verfahren zum Betrieb einer Geschirrspülmaschine
US20060260649A1 (en) * 2005-05-23 2006-11-23 Lee Jhe H Dishwasher and controlling method thereof
EP1810605A1 (de) * 2006-01-18 2007-07-25 CANDY S.p.A. Waschprozess für Geschirrspülmaschinen
US20100139698A1 (en) * 2008-12-09 2010-06-10 General Electric Company Staggered multi-mode spray arm wash system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064661A (en) * 1958-11-17 1962-11-20 Gen Motors Corp Cleaning apparatus for dishes or the like
BE623615A (de) * 1961-10-16
DE102004003536A1 (de) * 2004-01-23 2005-08-11 BSH Bosch und Siemens Hausgeräte GmbH Flüssigkeitsführendes elektrisches Haushaltsgerät
KR101526987B1 (ko) * 2008-08-21 2015-06-11 엘지전자 주식회사 식기 세척기 및 그 제어방법
DE102009029149A1 (de) * 2009-09-02 2011-03-03 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine sowie zugehöriges Steuerverfahren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659381A1 (de) * 1993-12-20 1995-06-28 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Betriebsverfahren für eine Geschirrspülmaschine
EP1219227A1 (de) * 2000-12-29 2002-07-03 BSH Bosch und Siemens Hausgeräte GmbH Steuerverfahren zum Steuern des elektrischen Antriebsmotors einer Pumpe auf verschiedene Drehzahlen
EP1669017A1 (de) * 2004-12-11 2006-06-14 Electrolux Home Products Corporation N.V. Verfahren zum Betrieb einer Geschirrspülmaschine
US20060260649A1 (en) * 2005-05-23 2006-11-23 Lee Jhe H Dishwasher and controlling method thereof
EP1810605A1 (de) * 2006-01-18 2007-07-25 CANDY S.p.A. Waschprozess für Geschirrspülmaschinen
US20100139698A1 (en) * 2008-12-09 2010-06-10 General Electric Company Staggered multi-mode spray arm wash system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108553060A (zh) * 2018-05-15 2018-09-21 李均辉 一种安全快捷洗碗装置
WO2023247080A1 (de) * 2022-06-23 2023-12-28 BSH Hausgeräte GmbH Spülverfahren mit diskontinuierlichem abgeben von spülflotte und geschirrspülmaschine

Also Published As

Publication number Publication date
CN103860122B (zh) 2018-10-12
CN103860122A (zh) 2014-06-18

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