EP2786693B1 - Dishwasher - Google Patents

Dishwasher Download PDF

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Publication number
EP2786693B1
EP2786693B1 EP12853319.7A EP12853319A EP2786693B1 EP 2786693 B1 EP2786693 B1 EP 2786693B1 EP 12853319 A EP12853319 A EP 12853319A EP 2786693 B1 EP2786693 B1 EP 2786693B1
Authority
EP
European Patent Office
Prior art keywords
washing
water
dishwasher
temperature
feed
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.)
Not-in-force
Application number
EP12853319.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2786693A4 (en
EP2786693A1 (en
Inventor
Masayoshi Uesaki
Yutaka Taniguchi
Naoki Hiromatsu
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.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Publication of EP2786693A1 publication Critical patent/EP2786693A1/en
Publication of EP2786693A4 publication Critical patent/EP2786693A4/en
Application granted granted Critical
Publication of EP2786693B1 publication Critical patent/EP2786693B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/0018Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047Energy or water consumption, e.g. by saving energy or water
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/06Water supply, circulation or discharge information
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09Water level
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12Water temperature
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/01Water supply, e.g. opening or closure of the water inlet valve
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/06Water heaters
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/26Indication or alarm to the controlling device or to the user
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/34Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Definitions

  • the present invention relates to a dishwasher that, while heating washing water stored in the washing tub, sprays the washing water from the washing nozzle toward tableware to wash it.
  • FIG. 6 is a sectional side view of the conventional dishwasher.
  • FIG. 7 is a block diagram illustrating the control structure of the conventional dishwasher.
  • FIG. 8 is a flowchart illustrating operation of the washing step of the conventional dishwasher.
  • FIG. 9 is an explanatory diagram illustrating the temperature of washing water and operation conditions of the conventional dishwasher.
  • this type of dishwasher has the structure as shown in FIG. 6 (refer to patent literature 1 for instance).
  • main body 20 of the dishwasher is provided therein with washing tub 21.
  • the bottom of washing tub 21 is provided therein with drain opening 3.
  • Washing pump 5 driven by washing motor 4 is placed in the pump chamber communicatively connected to drain opening 3.
  • Washing pump 5 circulates the washing water inside washing tub 21. The circulation is performed through the following path. First, the washing water is suctioned into washing pump 5 from drain opening 3. Next, the washing water is fed from washing pump 5 to washing nozzle 6 rotatably placed on the inner bottom of washing tub 21. Finally, the washing water is sprayed from washing nozzle 6 toward tableware 7 to wash tableware 7, and then returns to drain opening 3.
  • Heater 8 for heating the washing water is placed between washing nozzle 6 and the bottom of washing tub 21.
  • Control unit 22 indirectly senses that the temperature of the washing water has reached a given temperature from the temperature at the bottom of washing tub 21 by means of thermistor 23 that is a washing-water temperature sensor unit and stops applying power to heater 8.
  • Dish basket 11 is placed above washing nozzle 6. Dish basket 11 allows tableware 7 to be arranged in an orderly manner, thereby effectively spraying the washing water onto tableware 7 for efficiently washing tableware 7.
  • Washing tub 21 is open to the front, and its front surface has lid 12 freely opened and closed attached thereto.
  • Drain pump 13 sucks the washing water from drain opening 3 and drains the washing water outside the dishwasher through drain hose 14.
  • washing water stored inside washing tub 21 is fed from feed hose 15.
  • control unit 22 closes water feed valve 17 to stop feeding the washing water.
  • Blowing fan 18 for drying sends air from the outside of the dishwasher to the inside of washing tub 21 to discharge vapor generated from surfaces of tableware 7 and other parts to the outside of the dishwasher through air outlet 19 provided in lid 12, thereby drying tableware 7.
  • Control unit 22 and each load are connected as shown in FIG. 7 and operation of the dishwasher is controlled by control unit 22.
  • the operation step of the dishwasher is composed of the four steps: the washing step, rinsing step, heating and rinsing step, and drying step.
  • control unit 22 feeds washing water to a given water amount from water supply through feed water hose 15 (step S21).
  • control unit 22 applies power to washing pump 5 and heater 8 to continue operation until the temperature of the washing water reaches a first given temperature (e.g., 57°C) (steps S22 and S23).
  • a first given temperature e.g., 57°C
  • control unit 22 makes washing pump 5 continuously operate until the operating time reaches a given time to perform washing (steps S25 and S26). Then, control unit 22 makes drain pump 13 operate to drain washing water inside washing tub 2 (step S27) and advances the process flow to the next step (rinsing step).
  • control unit 22 repeats the operation twice in which control unit 22 stores clean washing water inside washing tub 21 and rinses tableware 7 for a given time while applying power only to washing pump 5 (not to heater 8).
  • control unit 22 stores clean washing water inside washing tub 21; applies power to washing pump 5 and heater 8; and performs operation until the washing water temperature reaches a second given temperature (e.g., 70°C) to rinse tableware 7.
  • control unit 22 intermittently applies power to heater 8 for a given time while applying power to blowing fan 18 for drying.
  • US 2010/0229901 A1 discloses a domestic dishwasher, comprising an attachment device for receiving intake water and an execution control device in which are stored one or more washing programs for controlling an execution of a wash cycle for washing dishes, wherein the execution control device is designed to adapt at least one parameter of at least one of the washing programs to a temperature of the fresh water.
  • a dishwasher of the present invention includes a washing tub disposed inside the main body, a dish basket for accommodating tableware to-be-washed; a washing nozzle for spraying washing water to wash the tableware; a heater unit for heating the washing water; a washing-water temperature sensor unit for measuring temperature of the washing water; and a control unit for controlling the dishwasher's operation.
  • the dishwasher sprays the heated washing water to wash the tableware.
  • the dishwasher further includes a feed-water temperature sensor unit for measuring feed water temperature of the washing water fed into the washing tub. When the feed water temperature is higher than a given temperature, the control unit sets the target temperature at which heating of the washing water during washing is stopped to a value that is lower than that which is set in the case where the feed water temperature is lower than the given temperature.
  • FIG. 1 is a sectional side view of a dishwasher according to the first exemplary embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating the control structure of the dishwasher according to the first exemplary embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating operation of the washing step of the dishwasher according to the first exemplary embodiment of the present invention.
  • FIG. 4 is an explanatory diagram illustrating the temperature of washing water and operation conditions of the dishwasher according to the first exemplary embodiment of the present invention.
  • FIG. 5 is a front view illustrating the operation unit of the dishwasher according to the first exemplary embodiment of the present invention.
  • Main body 1 of the dishwasher of the first exemplary embodiment is provided therein with washing tub 2 as shown in FIGs. 1 through 4 .
  • Washing tub 2 is provided therein with dish basket 11.
  • Rotatable washing nozzle 6 sprays the washing water onto tableware 7 accommodated in dish basket 11 to wash tableware 7.
  • the washing water is heated by heater 8 as the heater unit provided on the bottom of washing tub 2.
  • Washing tub 2 has thermistor 9 as the washing-water temperature sensor unit for measuring the temperature of washing water inside washing tub 2, attached to the back side of the bottom surface of washing tub 2.
  • Thermistor 9 measures the temperature of the washing water indirectly from the temperature of the bottom surface of washing tub 2.
  • thermistor 9 also serves as a feed-water temperature sensor unit for measuring the temperature of water fed from water supply.
  • Control unit 10 senses output voltage from thermistor 9.
  • Control unit 10 integrally includes indicator unit 24 to display information for a user by light emission of LEDs.
  • control unit 10 applies power to water feed valve 17 to feed the washing water from water supply to washing tub 2 through feed water hose 15.
  • control unit 10 stops applying power to water feed valve 17 to stop feeding the washing water (step S1).
  • Control unit 10 measures the temperature of feed water according to output voltage from thermistor 9 when given time (e.g., 1 minute) has elapsed after the wash operation started, and sets the value as the this time feed water temperature. Why feed water temperature is measured after given time has elapsed is that some time is required for the temperature of the washing water led into washing tub 2 to transmit to thermistor 9 through the wall of washing tub 2.
  • control unit 10 sets target temperature T1 (at which heating the washing water is stopped) to the first target temperature (e.g., 57°C) (step S3). Meanwhile, when the feed water temperature of the washing water is higher than given temperature T0 (e.g., 13°C) (Yes at step S2), control unit 10 sets target temperature T1 (at which heating the washing water is stopped) to the second target temperature (e.g., 52°C) (step S4). Subsequently, control unit 10 applies power to heater 8 and washing motor 4 to drive washing pump 5 while heating the washing water, thereby performing wash operation (step S5).
  • T0 e.g., 13°C
  • control unit 10 sets target temperature T1 (at which heating the washing water is stopped) to the first target temperature (e.g., 57°C) (step S3). Meanwhile, when the feed water temperature of the washing water is higher than given temperature T0 (e.g., 13°C) (Yes at step S2), control unit 10 sets target temperature T1 (at which heating the washing
  • step S6 When the washing water temperature is equal to target temperature T1 or lower (No at step S6), the process flow returns to step S5, where control unit 10 continues applying power to heater 8 and washing motor 4. Meanwhile, when the washing water temperature is higher than target temperature T1 (Yes at step S6), control unit 10 stops applying power to heater 8 (step S7). Subsequently, control unit 10 continues operating washing pump 5 until the operating time reaches a given time (steps S8 and S9). When the operating time of washing pump 5 reaches the given time, control unit 10 activates drain pump 13 to drain the washing water in washing tub 2 (step S10) and advances the process flow to the next step (rinsing step).
  • a higher washing water temperature makes soil deposited on tableware 7 softer and further activates the effect of enzymes contained in a detergent input by a user, resulting in higher wash performance.
  • feed water hose 15 feeds the washing water of relatively high temperature into washing tub 2, soil deposited on tableware 7 is to be washed by the washing water with high wash performance from the beginning. Accordingly, even a low target temperature (at which heating of the washing water is stopped) provides sufficient wash performance.
  • a feed water temperature higher than the given temperature lowers power consumption in the washing step, which allows the dishwasher to perform energy-saving operation.
  • the feed-water temperature sensor unit also serves as thermistor 9 that is a washing-water temperature sensor unit inside washing tub 2, thereby eliminating the need for newly incorporating a feed-water temperature sensor unit, which allows the dishwasher to perform more energy-saving operation.
  • Control unit 10 makes LED 25 for indicating "energy saving” on indicator unit 24 flash from the start of the operation until determination of feed water temperature to indicate that feed water temperature is being measured.
  • control unit 10 sets target temperature T1 to a lower value than that of the case where the feed water temperature is lower than given temperature T0, control unit 10 lights LED 25 until the operation ends.
  • control unit 10 lights LED 25 until the operation ends.
  • a dishwasher of the present invention includes a washing tub disposed inside the main body, a dish basket for accommodating tableware to be washed; a washing nozzle for spraying washing water to wash the tableware; a heater unit for heating washing water; a washing-water temperature sensor unit for measuring the temperature of the washing water; and a control unit for controlling the operation.
  • the dishwasher sprays the heated washing water to wash the tableware.
  • the dishwasher further includes a feed-water temperature sensor unit for measuring feed water temperature of the washing water fed into the washing tub. When the feed water temperature is higher than a given temperature, the control unit changes the setting so that the target temperature at which heating of the washing water during washing is stopped becomes lower than a temperature in a case where the feed water temperature is lower than the given temperature.
  • its feed-water temperature sensor unit also serves as a washing-water temperature sensor unit for measuring the temperature of washing water inside the washing tub.
  • the dishwasher according to one embodiment of the present invention further includes an indicator unit, and the control unit indicates that, due to a fact that the feed water temperature measured is higher than a given temperature, the control unit has set the target temperature (at which heating of washing water during washing is stopped) to a lower value than that of the case where the feed water temperature is higher than the given temperature.
  • control unit indicates on the indicator unit that the feed-water temperature sensor unit is measuring the temperature of feed water. This informs a user that the dishwasher is checking for a possibility of energy-saving operation, which encourages energy-saving operation of the dishwasher.
  • a dishwasher according to the present invention automatically changes its operation program to the energy-saving mode when the feed water temperature is relatively high, and thus widely applicable to easy-to-use dishwashers.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP12853319.7A 2011-11-29 2012-10-29 Dishwasher Not-in-force EP2786693B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011259959A JP5445566B2 (ja) 2011-11-29 2011-11-29 食器洗い機
PCT/JP2012/006904 WO2013080433A1 (ja) 2011-11-29 2012-10-29 食器洗い機

Publications (3)

Publication Number Publication Date
EP2786693A1 EP2786693A1 (en) 2014-10-08
EP2786693A4 EP2786693A4 (en) 2015-05-20
EP2786693B1 true EP2786693B1 (en) 2016-06-22

Family

ID=48534938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12853319.7A Not-in-force EP2786693B1 (en) 2011-11-29 2012-10-29 Dishwasher

Country Status (5)

Country Link
EP (1) EP2786693B1 (zh)
JP (1) JP5445566B2 (zh)
CN (1) CN103826522B (zh)
TW (1) TWI532459B (zh)
WO (1) WO2013080433A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104905746B (zh) * 2015-06-26 2018-03-30 佛山市顺德区美的洗涤电器制造有限公司 洗碗机

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2904640B2 (ja) * 1992-04-17 1999-06-14 株式会社日立製作所 食器洗い機
WO1994009693A1 (en) * 1992-10-30 1994-05-11 Southcorp Manufacturing Pty Ltd A method and apparatus for controlling a dishwasher
JP3338621B2 (ja) * 1996-11-14 2002-10-28 リンナイ株式会社 洗浄機
JP2001204676A (ja) * 2000-01-28 2001-07-31 Toto Ltd 食器洗い機
DE10054957A1 (de) * 2000-11-06 2002-05-08 Aeg Hausgeraete Gmbh Programmsteuerungsverfahren für ein wasserführendes Haushaltsgerät
JP4538996B2 (ja) * 2001-08-07 2010-09-08 パナソニック株式会社 食器洗い機
KR101268756B1 (ko) * 2006-04-25 2013-05-29 엘지전자 주식회사 식기 세척기, 식기 세척기의 린스투입장치 및 방법
KR20070105051A (ko) * 2006-04-25 2007-10-30 엘지전자 주식회사 식기 세척기 및 그 제어 방법
JP4726233B2 (ja) * 2006-11-08 2011-07-20 リンナイ株式会社 食器洗い機
DE102008043576A1 (de) * 2008-11-07 2010-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine
DE102009001429A1 (de) * 2009-03-10 2010-09-16 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
JP5030987B2 (ja) * 2009-03-30 2012-09-19 三菱電機株式会社 食器洗い機
JP2011072770A (ja) * 2009-09-07 2011-04-14 Panasonic Corp 食器洗い機

Also Published As

Publication number Publication date
JP5445566B2 (ja) 2014-03-19
CN103826522B (zh) 2016-03-23
EP2786693A4 (en) 2015-05-20
CN103826522A (zh) 2014-05-28
TWI532459B (zh) 2016-05-11
EP2786693A1 (en) 2014-10-08
TW201332504A (zh) 2013-08-16
JP2013111233A (ja) 2013-06-10
WO2013080433A1 (ja) 2013-06-06

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