WO2015096922A1 - A dishwasher with improved washing performance - Google Patents

A dishwasher with improved washing performance Download PDF

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Publication number
WO2015096922A1
WO2015096922A1 PCT/EP2014/073328 EP2014073328W WO2015096922A1 WO 2015096922 A1 WO2015096922 A1 WO 2015096922A1 EP 2014073328 W EP2014073328 W EP 2014073328W WO 2015096922 A1 WO2015096922 A1 WO 2015096922A1
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WO
WIPO (PCT)
Prior art keywords
water temperature
wash water
dishwasher
control unit
circulation
Prior art date
Application number
PCT/EP2014/073328
Other languages
French (fr)
Inventor
Gokhan Ak
Serkan DEMIR
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to EP14790634.1A priority Critical patent/EP3091890A1/en
Priority to AU2014372867A priority patent/AU2014372867A1/en
Publication of WO2015096922A1 publication Critical patent/WO2015096922A1/en

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    • 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
    • A47L15/0047—Energy or water consumption, e.g. by saving 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
    • 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
    • A47L2401/12—Water temperature
    • 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
    • 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
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to a dishwasher the energy consumption and washing performance of which is optimized.
  • German Patent Application No. DE19734264 a dishwasher is disclosed wherein energy consumption is decreased and the program time is shortened.
  • the aim of the present invention is the realization of a dishwasher, the energy consumption and the washing performance of which are improved.
  • the dishwasher realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a body, a washing tub that is disposed into the body and wherein the washing process is performed, a circulation line that supplies water to the washing tub, a circulation pump that enables water to be pumped from the circulation line to the washing tub, a temperature sensor that is disposed on the body and that measures the temperature of the mains water and the temperature of the wash water, a heater that heats the mains water, and a control unit that controls the operation of the heater, the circulation pump and the temperature sensor in accordance with the program steps predetermined by the manufacturer.
  • the control unit regulates the circulation time in the main washing step by comparing the measured mains water temperature with the target wash water temperature value.
  • the control unit changes the circulation time during the main washing process depending on the circulation time during the heating operation.
  • the circulation time that gets shorter in the heating step due to high mains water temperature is compensated in the main washing step. Thus, the same washing performance is attained in every situation independently from the mains water temperature.
  • control unit prolongs the circulation time realized in the main washing step by an additional time predetermined by the manufacturer if the circulation time realized in the heating step is smaller than the heating circulation time predetermined by the manufacturer.
  • the washing process is prevented from ending before the objects in the dishwasher are entirely cleaned.
  • control unit decreases the main washing circulation time prerecorded for the main washing step in the control unit by an additional time predetermined by the manufacturer if the circulation time realized in the heating step is greater than the heating circulation time predetermined by the manufacturer.
  • energy consumption is prevented from increasing due to excessive circulation and the total program time is decreased.
  • control unit does not change the predetermined main washing circulation time and the heating circulation time if the measured mains water temperature is equal to the target wash water temperature value.
  • control unit deactivates the heater and operates the circulation time of the heating step in the washing step if the measured mains water temperature is greater than the target wash water temperature value. Consequently, the energy consumption is decreased.
  • control unit operates the heater for a longer time and/or at a higher power value if the measured mains water temperature is smaller than the target wash water temperature value.
  • Figure 1 – is the perspective view of a dishwasher.
  • T tw a target wash water temperature value predetermined by the manufacturer
  • ( ⁇ T) temperature difference between the target wash water temperature value (T tw ) and the measured mains water temperature (T rt )
  • the dishwasher (1) of the present invention comprises,
  • the control unit (8) of the present invention in the memory of which a heating circulation time (t ch ) for the heating step predetermined by the manufacturer and a main washing circulation time (t cw ) for the main washing step predetermined by the manufacturer are recorded, changes the main washing circulation time (t cw ) by comparing the measured wash water temperature (T rw ) and a target wash water temperature value (T tw ) predetermined by the manufacturer.
  • the control unit (8) prolongs the main washing circulation time (t cw ) depending on the measured mains water temperature (T rt ) or deactivates the circulation pump (7) before the main washing circulation time (t cw ) is completed. Thus, deviations in the cleaning performance of the dishwasher (1) are decreased without changing the energy consumption.
  • the control unit (8) prolongs the main washing circulation time (t cw ) by an additional time (t d ) predetermined by the manufacturer if the measured mains water temperature (T rt ) is greater than the target wash water temperature value (T tw ).
  • the additional time (t d ) is implemented depending on the temperature difference interval ( ⁇ T 1 , ⁇ T 2 , ⁇ T 3 ,.7) that is prerecorded in the control unit (8) by the manufacturer and that corresponds to the temperature difference ( ⁇ T) between the target wash water temperature value (T tw ) and the measured mains water temperature (T rt ).
  • the circulation time that decreases due to shortened heating process time is prolonged by additional times that are prerecorded in the control unit (8) by the manufacturer.
  • the control unit (8) stops the circulation pump (7) before the main washing circulation time (t cw ) is completed if the measured mains water temperature (T rt ) is smaller than the target main washing temperature value (T tw ).
  • the circulation time that continues in the main washing step is kept short.
  • the cleansed dirt is prevented from adhering again on the cleaned items due to excessive circulation and the program time is prevented from prolonging.
  • control unit (8) operates the circulation pump (7) during the main washing circulation time (t cw ) if the measured mains water temperature (T rt ) is equal to the target wash water temperature value (T tw ).
  • T cw main washing circulation time
  • control unit (8) deactivates the heater (5) if measured mains water temperature (T rt ) is greater than the target wash water temperature value (T tw ). Consequently, energy consumption is decreased and program times are shortened by skipping the heating step.
  • control unit (8) operates the heater (5) for a longer time if the measured mains water temperature (T rt ) is smaller than the target wash water temperature value (T tw ).
  • control unit (8) operates the heater (5) at a higher power value.
  • a dishwasher (1) is realized, the energy consumption and washing performance of which are independent from the temperature of the used mains water.

Abstract

The present invention relates to a dishwasher (1) comprising a body (2), a washing tub (3) that is disposed into the body (2) and wherein the objects to be washed are placed, a circulation line (4) that is disposed on the body (2) and that enables water to be supplied into the washing tub (3), a heater (5) that is disposed on the circulation line (4) and that enables the wash water to be heated, a circulation pump (7) that provides the circulation of the wash water inside the washing tub (3), and a temperature sensor (6) that measures the temperature of the wash water.

Description

A DISHWASHER WITH IMPROVED WASHING PERFORMANCE
The present invention relates to a dishwasher the energy consumption and washing performance of which is optimized.
In dishwashers, electric energy is mostly consumed in the phase of heating the water received from the mains. In this stage, the heater is operated and the wash water is raised to the temperatures predetermined by the manufacturer for the selected washing program. Therefore, energy consumption depends on the temperature changes in the mains water. The changes in the temperature of the mains water also affect the cleaning performance of the dishwasher. Mains water at low temperatures result in increase of the program times of the washing steps and the amount of consumed energy, while the mains water at high temperatures adversely affect the washing and rinsing performance of the dishwasher since the program times are shortened.
In the state of the art German Patent Application No. DE19734264, a dishwasher is disclosed wherein energy consumption is decreased and the program time is shortened.
The aim of the present invention is the realization of a dishwasher, the energy consumption and the washing performance of which are improved.
The dishwasher realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a body, a washing tub that is disposed into the body and wherein the washing process is performed, a circulation line that supplies water to the washing tub, a circulation pump that enables water to be pumped from the circulation line to the washing tub, a temperature sensor that is disposed on the body and that measures the temperature of the mains water and the temperature of the wash water, a heater that heats the mains water, and a control unit that controls the operation of the heater, the circulation pump and the temperature sensor in accordance with the program steps predetermined by the manufacturer.
The control unit regulates the circulation time in the main washing step by comparing the measured mains water temperature with the target wash water temperature value. The control unit changes the circulation time during the main washing process depending on the circulation time during the heating operation. The circulation time that gets shorter in the heating step due to high mains water temperature is compensated in the main washing step. Thus, the same washing performance is attained in every situation independently from the mains water temperature.
In an embodiment of the present invention, the control unit prolongs the circulation time realized in the main washing step by an additional time predetermined by the manufacturer if the circulation time realized in the heating step is smaller than the heating circulation time predetermined by the manufacturer. Thus, the washing process is prevented from ending before the objects in the dishwasher are entirely cleaned.
In an embodiment of the present invention, the control unit decreases the main washing circulation time prerecorded for the main washing step in the control unit by an additional time predetermined by the manufacturer if the circulation time realized in the heating step is greater than the heating circulation time predetermined by the manufacturer. Thus, energy consumption is prevented from increasing due to excessive circulation and the total program time is decreased.
In an embodiment of the present invention, the control unit does not change the predetermined main washing circulation time and the heating circulation time if the measured mains water temperature is equal to the target wash water temperature value.
In an embodiment of the present invention, the control unit deactivates the heater and operates the circulation time of the heating step in the washing step if the measured mains water temperature is greater than the target wash water temperature value. Consequently, the energy consumption is decreased.
In an embodiment of the present invention, the control unit operates the heater for a longer time and/or at a higher power value if the measured mains water temperature is smaller than the target wash water temperature value.
A dishwasher realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the perspective view of a dishwasher.
The following symbols are used for explicating the dishwasher (1) of the present invention:
(tch) : a heating circulation time predetermined by the manufacturer for the heating step
(tcw): a main washing circulation time predetermined by the manufacturer for the main washing step
(Trw) : measured wash water temperature
(Ttw) : a target wash water temperature value predetermined by the manufacturer
(td) : an additional time predetermined by the manufacturer.
(∆T) : temperature difference between the target wash water temperature value (Ttw) and the measured mains water temperature (Trt)
(∆T1, ∆T2, ∆T3,….) : more than one temperature difference interval entered previously into the control unit (8) by the manufacturer
The elements illustrated in the figures are numbered as follows:
  1. Dishwasher
  2. Body
  3. Washing tub
  4. Circulation line
  5. Heater
  6. Temperature sensor
  7. Circulation pump
  8. Control unit
The dishwasher (1) of the present invention comprises,
  • a body (2),
  • a washing tub (3) that is disposed into the body (2) and wherein the objects to be washed are placed,
  • a circulation line (4) that is disposed on the body (2) and that enables water to be delivered into the washing tub (3),
  • a heater (5) that is disposed on the circulation line (4) and that enables the wash water to be heated,
  • a temperature sensor (6) that is disposed on the body (2) and that measures the temperature of the wash water or the mains water,
  • a circulation pump (7) that is disposed on the circulation line (4) and that enables the wash water to be circulated inside the washing tub (3),
  • a control unit (8) that implements the washing programs composed of the main washing, rinsing and drying steps.
The control unit (8) of the present invention, in the memory of which a heating circulation time (tch) for the heating step predetermined by the manufacturer and a main washing circulation time (tcw) for the main washing step predetermined by the manufacturer are recorded, changes the main washing circulation time (tcw) by comparing the measured wash water temperature (Trw) and a target wash water temperature value (Ttw) predetermined by the manufacturer. The control unit (8) prolongs the main washing circulation time (tcw) depending on the measured mains water temperature (Trt) or deactivates the circulation pump (7) before the main washing circulation time (tcw) is completed. Thus, deviations in the cleaning performance of the dishwasher (1) are decreased without changing the energy consumption.
In an embodiment of the present invention, the control unit (8) prolongs the main washing circulation time (tcw) by an additional time (td) predetermined by the manufacturer if the measured mains water temperature (Trt) is greater than the target wash water temperature value (Ttw). The additional time (td), is implemented depending on the temperature difference interval (∆T1, ∆T2, ∆T3,….) that is prerecorded in the control unit (8) by the manufacturer and that corresponds to the temperature difference (∆T) between the target wash water temperature value (Ttw) and the measured mains water temperature (Trt). Thus, in periods like the summer season when the temperature of the mains water increases, the circulation time that decreases due to shortened heating process time, is prolonged by additional times that are prerecorded in the control unit (8) by the manufacturer.
In an embodiment of the present invention, the control unit (8) stops the circulation pump (7) before the main washing circulation time (tcw) is completed if the measured mains water temperature (Trt) is smaller than the target main washing temperature value (Ttw). In the heating step, because of the prolonged circulation time since the heating process takes more time, the circulation time that continues in the main washing step is kept short. Thus, the cleansed dirt is prevented from adhering again on the cleaned items due to excessive circulation and the program time is prevented from prolonging.
In an embodiment of the present invention, the control unit (8) operates the circulation pump (7) during the main washing circulation time (tcw) if the measured mains water temperature (Trt) is equal to the target wash water temperature value (Ttw). Thus, the same washing performance is attained in every situation independent of the mains water temperature and consumer satisfaction is increased.
In an embodiment of the present invention, the control unit (8) deactivates the heater (5) if measured mains water temperature (Trt) is greater than the target wash water temperature value (Ttw). Consequently, energy consumption is decreased and program times are shortened by skipping the heating step.
In an embodiment of the present invention, the control unit (8) operates the heater (5) for a longer time if the measured mains water temperature (Trt) is smaller than the target wash water temperature value (Ttw).
In a derivative of this embodiment, the control unit (8) operates the heater (5) at a higher power value.
By means of the present invention, a dishwasher (1) is realized, the energy consumption and washing performance of which are independent from the temperature of the used mains water.

Claims (7)

  1. A dishwasher (1) comprising
    - a body (2),
    - a washing tub (3) that is disposed into the body (2) and wherein the objects to be washed are placed,
    - a circulation line (4) that is disposed on the body (2) and that enables water to be delivered into the washing tub (3),
    - a heater (5) that is disposed on the circulation line (4) and that enables the wash water to be heated,
    - a temperature sensor (6) that is disposed on the body (2) and that measures the temperature of the wash water or the mains water,
    - a circulation pump (7) that is disposed on the circulation line (4) and that enables the wash water to be circulated inside the washing tub (3),
    - a control unit (8) that implements the washing programs composed of the main washing, rinsing and drying steps,
    characterized by the control unit (8), in the memory of which a heating circulation time (tch) for the heating step predetermined by the manufacturer and a main washing circulation time (tcw) for the main washing step predetermined by the manufacturer are recorded, that changes the main washing circulation time (tcw) by comparing the measured wash water temperature (Trw) and a target wash water temperature value (Ttw) predetermined by the manufacturer.
  2. A dishwasher (1) as in Claim 1, characterized by the control unit (8) that prolongs the main washing circulation time (tcw) if the measured mains water temperature (Trt) is greater than the target wash water temperature value (Ttw).
  3. A dishwasher (1) as in Claim 1, characterized by the control unit (8) that stops the circulation pump (7) before the main washing circulation time (tcw) is completed if the measured mains water temperature (Trt) is smaller than the target wash water temperature value (Ttw).
  4. A dishwasher (1) as in Claim 1, characterized by the control unit (8) that operates the circulation pump (7) during the heating circulation time (tch) and the main washing circulation time (tcw) if the measured mains water temperature (Trt) is equal to the target wash water temperature value (Ttw).
  5. A dishwasher (1) as in Claim 1 or 2, characterized by the control unit (8) that deactivates the heater (5) if the measured mains water temperature (Trt) is greater than the target wash water temperature value (Ttw).
  6. A dishwasher (1) as in Claim 1 or 3, characterized by the control unit (8) that operates the heater (5) for a longer time if the measured mains water temperature (Trt) is smaller than the target wash water temperature value (Ttw).
  7. A dishwasher (1) as in Claim 1 or 3, characterized by the control unit (8) that operates the heater (5) at a higher power value if the measured mains water temperature (Trt) is smaller than the target wash water temperature value (Ttw).
PCT/EP2014/073328 2013-12-27 2014-10-30 A dishwasher with improved washing performance WO2015096922A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14790634.1A EP3091890A1 (en) 2013-12-27 2014-10-30 A dishwasher with improved washing performance
AU2014372867A AU2014372867A1 (en) 2013-12-27 2014-10-30 A dishwasher with improved washing performance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2013/15399 2013-12-27
TR201315399 2013-12-27

Publications (1)

Publication Number Publication Date
WO2015096922A1 true WO2015096922A1 (en) 2015-07-02

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ID=51842539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/073328 WO2015096922A1 (en) 2013-12-27 2014-10-30 A dishwasher with improved washing performance

Country Status (3)

Country Link
EP (1) EP3091890A1 (en)
AU (1) AU2014372867A1 (en)
WO (1) WO2015096922A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792276A (en) * 1992-10-30 1998-08-11 Southcorp Manufacturing Pty. Ltd. Method and apparatus for controlling a dishwasher
DE19734264A1 (en) 1997-08-07 1999-02-11 Bosch Siemens Hausgeraete Programme control method for domestic dish washing machine
DE10054957A1 (en) * 2000-11-06 2002-05-08 Aeg Hausgeraete Gmbh Program control method for water-carrying domestic machine involves automatically varying duration of individual washing stages depending on water inlet temperature
EP2228001A1 (en) * 2009-03-10 2010-09-15 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792276A (en) * 1992-10-30 1998-08-11 Southcorp Manufacturing Pty. Ltd. Method and apparatus for controlling a dishwasher
DE19734264A1 (en) 1997-08-07 1999-02-11 Bosch Siemens Hausgeraete Programme control method for domestic dish washing machine
DE10054957A1 (en) * 2000-11-06 2002-05-08 Aeg Hausgeraete Gmbh Program control method for water-carrying domestic machine involves automatically varying duration of individual washing stages depending on water inlet temperature
EP2228001A1 (en) * 2009-03-10 2010-09-15 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher

Also Published As

Publication number Publication date
AU2014372867A1 (en) 2016-07-07
EP3091890A1 (en) 2016-11-16

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