EP3138460B1 - Geschirrspülmaschine mit erhöhter sicherheit und steuerungsverfahren dafür - Google Patents

Geschirrspülmaschine mit erhöhter sicherheit und steuerungsverfahren dafür Download PDF

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Publication number
EP3138460B1
EP3138460B1 EP16184767.8A EP16184767A EP3138460B1 EP 3138460 B1 EP3138460 B1 EP 3138460B1 EP 16184767 A EP16184767 A EP 16184767A EP 3138460 B1 EP3138460 B1 EP 3138460B1
Authority
EP
European Patent Office
Prior art keywords
pump
water
heater
washing
dishwasher
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.)
Active
Application number
EP16184767.8A
Other languages
English (en)
French (fr)
Other versions
EP3138460A1 (de
Inventor
Serkan DEMIR
Songul Bayraktar
Bulent Kucukcoskun
Hasret GURSOY
Orhan Atabey
Engin Dik
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to PL16184767T priority Critical patent/PL3138460T3/pl
Publication of EP3138460A1 publication Critical patent/EP3138460A1/de
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Publication of EP3138460B1 publication Critical patent/EP3138460B1/de
Active 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
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/4244—Water-level measuring or regulating 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
    • A47L15/4225—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
    • A47L15/4285—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
    • 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
    • A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
    • 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
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • 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
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the 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
    • 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
    • A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply

Definitions

  • the present invention relates to a dishwasher that comprises a heater that is used in the washing of the dishes and a pump that provides the cycle of the washing water.
  • a dishwasher comprising a control unit that monitors the current value drawn by the circulation pump, thus that detects whether the pump is out of water and the filter is clogged according to this value.
  • a micro switching element is disclosed that is used in the detection of the water level; and a dishwasher is disclosed wherein the heater is controlled according to the data received from the said micro switching element.
  • a dishwasher comprising a heater disposed at the base of the washing area, wherein the heater is prevented from overheating due to low water level.
  • US 2015/0019026 A1 discloses a dishwasher that includes a current measurement circuit configured to provide a feedback signal that describes an inverter current drawn by an inverter providing three-phase power to a pump motor.
  • a control unit detects pump cavitation and dry state by monitoring the feedback signal, heating elements are turned off while water is added to the circulation system.
  • the aim of the present invention is the realization of a dishwasher of which the security is improved while operating in low water level.
  • the dishwasher realized in order to attain the aim of the present invention, explicated in the claims, comprises a control unit that decides whether the pump is out of water by monitoring the current value drawn by the circulation pump and that delays the operation of the heater for the security of the heater when the pump is out of water.
  • the decision whether the water level gets below the level that the pump can operate normally can be made only by monitoring the amount of the current the pump draws without the need for the use of any level sensor to determine the water level in the dishwasher. Since the water level in this situation is also below the level that the heater can operate normally, when the pump is detected to be out of water, it is also detected that the heater cannot operate under normal circumstances.
  • the control unit prevents the heater from overheating by delaying the operation of the heater when the water level stays below the heater level for a certain amount of time.
  • control unit enables the user to be warned if the pump is out of water for a predetermined time period.
  • the user is warned when the pump is out of water due to the low water level and the heater cannot be operated, and thus the user is informed about the washing cycle not being completed.
  • control unit provides extra water intake into the dishwasher until the pump draws more current than the predetermined limit current value.
  • the control method of the present invention comprises the steps of measuring the current value drawn by the pump; controlling whether the current value of the pump stays below the limit current value during the first limit time period; continuing the normal washing process if the pump draws more current than the limit current value; controlling whether extra water should be taken if the pump draws less current than the limit current value; taking extra water if extra water can be taken; controlling whether the heater operates if extra water cannot be taken; shutting off the heater if the heater operates; not operating the heater if the heater does not operate, and ending the program by warning the user.
  • the decrease in the wash water in any way is detected by taking into consideration the amount of the current drawn by the pump without using any extra level sensors, etc for the measuring of the water level used in the washing.
  • the control unit prevents the heater from overheating by interfering the operation of the heater when the pump is out of water, and a possible fire is prevented.
  • the dishwasher (1) comprises a body (2); a washing area (3) that is arranged in the body (2) and wherein the dishes are placed and washed; a heater (4) that is disposed at the floor/base of the washing area (3) and that enables the wash water to be heated; a pump (5) that realizes the cycle of the wash water in the washing area (3); and a control unit (6) that controls the heater (4) and monitors the current (I) drawn by the pump (5) and that decides that the pump (5) is out of water if the drawn amount of the current (I) is less than a predetermined limit current value (I lim ) during a predetermined first limit time period (t1).
  • a predetermined limit current value I lim
  • the control unit (6) provides water intake into the washing area (3) and the cycle of the taken water inside the washing area (3) by controlling the pump (5), in other words, enables the dishes to be washed by sending the water taken to the spray arms (not shown in the figures).
  • the heating of the water used in the washing is realized by the heater (4) disposed in the floor of the washing area (3) being energized by the control unit (6).
  • the water occupies a certain volume in the washing area (3) so as to cover the heater (4) at the base of the washing area (3), and the heater (4) heats the water located at the base of the washing area (3).
  • the control unit (6) decides whether the pump (5) is out of water/pumps enough amount of water by monitoring the current drawn by the pump (5).
  • the volume of the water at the base of the washing area (3) decreases, the amount of the water passing through the pump (5) for the realization of the cycle decreases.
  • the amount of the water that the pump (5) circulates and the power consumed by the motor (not shown in the figures) that enables the pump (5) to realize its function are in direct proportion with each other.
  • the resistance on the pump (5) motor gets lower and the pump (5) draws less current.
  • control unit (6) continually monitors the current value drawn by the pump (5), and decides whether the pump (5) realizes the cycle of enough amount of water according to the decrease in the current value. Since the pump (5) is disposed preferably in the lower portion of the washing area (3), in case the pump (5) cannot pump enough water, it is understood that the water in the washing area (3) has decreased, and the water level stays below the heater (4) level.
  • the control unit (6) decides that the pump (5) is out of water if the amount of the current (I) drawn by the pump (5) is less than a predetermined limit current value (I lim ) during a predetermined first limit time period (t1).
  • the producer determines the current value (I) drawn by the pump (5) as the limit current value (I lim ) wherein the pump (5) is out of water within a certain interval in case the pump (5) is out of water, in other words in case not enough water passes through the pump (5).
  • the control unit (6) monitors the current value (I) drawn by the pump (5) during the washing process and decides that the pump (5) is out of water when the said current value (I) stays below the predetermined limit current value (I lim ) during the first limit time period (t1).
  • the control unit (6) of the dishwasher (1) of the present invention delays the operation of the heater (4) when the pump (5) operates without water during a predetermined second limit period (t2). Since the water level in the washing area (3) also stays below the heater (4) level when the pump (5) is out of water, the control unit (6) delays the operation of the heater (4) preferably until the problem is solved.
  • control unit (6) does not operate the heater (4) when the pump (5) operates without water during a predetermined third limit time period (t3). If the pump (5) is out of water during the third limit time period (t3) that is preferably longer than the first and the second time periods, the control unit (6) does not operate the heater (4), thus preventing possible security problems.
  • the control unit (6) enables the heater to be turned off (4) when the pump (5) operates without water during a predetermined fourth limit time period (t4) while the heater (4) operates. If the pump (5) is out of water during the fourth limit period (t4) that is predetermined by the producer and that is preferably the maximum time period in which the heater (4) can safely operate when the washing process properly starts and while the control unit (6) enables the wash water to be heated by operating the heater (4), the control unit (6) enables the heater (4) to be turned off.
  • control unit (6) enables the user to be warned if the pump (5) operates without water for a predetermined fifth limit time period (t5).
  • the control unit (6) enables the user to be warned.
  • control unit (6) provides water intake into the washing area (3) if the pump (5) operates without water for a predetermined sixth limit time period (t6).
  • the control unit (6) provides water intake into the washing area (3) in order that the water level inside the washing area (3) increases and therefore both the pump (5) and the heater (4) operate in a proper way.
  • the time periods stated in the above-mentioned embodiments can be equal, different, or some of them equal and some of them different in different embodiments of the invention.
  • the first limit time period (t1) required to elapse in order that the pump (5) is decided to be out of water and the fourth limit time period (t4) during which the pump (5) is required to be out of water in order that the operating heater (4) is turned off may be equal in an embodiment of the present invention.
  • control unit (6) provides water intake into the washing area (3) until the pump (5) draws current that is equal to or more than the predetermined limit current value (I lim ).
  • control unit (6) provides extra water intake into the washing area (3) until the water level in the washing area (3) reaches the level at which the pump (5) can normally operate, in other words until the pump (5) draws current that is equal to or more than the predetermined limit current value (I lim ).
  • the control method of the present invention used in the above-disclosed dishwasher (1) and executed by the control unit (6) comprises the following steps for determining the water level in the washing area (3),
  • the current value (I) drawn by the pump (5) is monitored by the control unit (6) in order to measure the amount of the water in the washing area (3), in other words in order to detect the water level, and thus the need for using an extra level sensor is eliminated.
  • the water level is decided to decrease with the pump (5) drawing less current.
  • the pump (5) being out of water also means that the heater (4) is above the water level, in other words the heater (4) is without water. Therefore, the control unit (6) can also decide on the heater (4) by monitoring the current value (I) drawn by the pump (5) and operates the heater (4) so as to create no danger.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (3)

  1. Eine Geschirrspülmaschine (1) umfasst einen Körper (2), einen Spülbereich (3), der in dem Körper (2) angeordnet ist, worin das Geschirr platziert und gespült wird, einen Heizer (4), der an dem Boden des Spülbereichs (3) und das Erhitzen des Waschwassers ermöglicht, eine Pumpe (5), die den Waschwasserkreislauf im Spülbereich (3) gewährleistet; und eine Steuereinheit (6), die angepasst ist, damit folgende Schritte ausgeführt werden:
    - messen des von der Pumpe (5) gezogenen Stromwerts (I), wenn die Pumpe (5) den Wasserkreislauf durchführt,
    - Vergleichen des von der Pumpe (5) entnommenen Stromwertes (I) mit dem Grenzstromwert (Ilim) während einer ersten Grenzzeitspanne (t1),
    - Fortsetzung des normalen Waschvorgangs, wenn die Pumpe (5) während des ersten Grenzzeitraums (t1) mehr Strom als die Höhe des Grenzstroms (Ilim) verbraucht,
    - Kontrollieren, ob das vom Benutzer gewählte Waschprogramm eine zusätzliche Wasseraufnahme in den Waschbereich (3) zulässt, indem entschieden wird, ob die Pumpe (5) kein Wasser mehr hat, wenn die Pumpe (5) weniger Strom als die Menge des Grenzstroms (Ilim) während des ersten Grenzzeitraums (t1) verbraucht,
    - Kontrollieren, ob der Heizer (4) in Betrieb ist, wenn das ausgewählte Spülprogramm keine zusätzliche Wasseraufnahme zulässt,
    - die Heizung (4) ausschalten, wenn die Heizung (4) in Betrieb ist,
    - die Heizung (4) nicht einschalten, wenn die Heizung (4) nicht funktioniert,
    - den Benutzer warnen und / oder das Programm beenden,
    - Wasser in den Spülbereich (3) leiten, wenn das Waschprogramm eine zusätzliche Wasseraufnahme zulässt,
    - Zurück zum ersten Schritt kehren.
  2. Eine Geschirrspülmaschine (1), wie in Anspruch 1 aufgeführt, ist dadurch gekennzeichnet, dass die Steuereinheit (6) es dem Benutzer ermöglicht gewarnt zu werden, wenn die Pumpe (5) für einen vorbestimmten fünften Grenzzeitraum (t5) ohne Wasser arbeitet.
  3. Eine Geschirrspülmaschine (1), wie in Anspruch 1 oder 2 aufgeführt, ist dadurch gekennzeichnet, dass die Steuereinheit (6) das Wasser in den Spülbereich (3) ansaugt, bis die Pumpe (5) einen Strom ansaugt, der gleich oder größer als der vorgegebene Grenzstromwert (Ilim) ist.
EP16184767.8A 2015-09-04 2016-08-18 Geschirrspülmaschine mit erhöhter sicherheit und steuerungsverfahren dafür Active EP3138460B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16184767T PL3138460T3 (pl) 2015-09-04 2016-08-18 Zmywarka do naczyń o zwiększonym bezpieczeństwie i sposób sterowania nią

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR201511021 2015-09-04

Publications (2)

Publication Number Publication Date
EP3138460A1 EP3138460A1 (de) 2017-03-08
EP3138460B1 true EP3138460B1 (de) 2019-11-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16184767.8A Active EP3138460B1 (de) 2015-09-04 2016-08-18 Geschirrspülmaschine mit erhöhter sicherheit und steuerungsverfahren dafür

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EP (1) EP3138460B1 (de)
PL (1) PL3138460T3 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170049296A1 (en) * 2015-08-18 2017-02-23 General Electric Company Controlling the operation of a dishwashing appliance
CN107028574B (zh) * 2017-05-08 2020-05-08 佛山市顺德区美的洗涤电器制造有限公司 底座及洗碗机
CN108784582A (zh) * 2018-05-23 2018-11-13 佛山市顺德区美的洗涤电器制造有限公司 进水控制方法、洗碗机及计算机可读存储介质
CN111956086B (zh) * 2020-07-13 2024-04-19 华帝股份有限公司 一种烹饪设备的缺水检测方法

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WO2005089621A1 (en) 2004-03-16 2005-09-29 Arcelik Anonim Sirketi A dishwasher and control method thereof
KR101267336B1 (ko) 2007-03-27 2013-05-23 삼성전자주식회사 식기세척기 및 그 수위제어방법
KR20100048467A (ko) 2008-10-31 2010-05-11 삼성전자주식회사 식기세척기
DE102008043933A1 (de) * 2008-11-20 2010-05-27 BSH Bosch und Siemens Hausgeräte GmbH Haushalts-Geschirrspülmaschine mit einer Sorptionstrocknungseinrichtung sowie zugehöriges Verfahren
KR20140014744A (ko) 2012-07-26 2014-02-06 린나이코리아 주식회사 식기세척기의 히터 공가열 방지방법
US9609997B2 (en) * 2013-07-09 2017-04-04 Haier Us Appliance Solutions, Inc. Systems and methods for detecting appliance pump cavitation or dry state
KR101672284B1 (ko) * 2014-06-12 2016-11-03 엘지전자 주식회사 식기세척기 및 식기세척기의 제어방법

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Publication number Publication date
PL3138460T3 (pl) 2020-05-18
EP3138460A1 (de) 2017-03-08

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