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EP2120669B1 - Dishwasher with temperature increase for hygienic environment - Google Patents

Dishwasher with temperature increase for hygienic environment Download PDF

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Publication number
EP2120669B1
EP2120669B1 EP07858141A EP07858141A EP2120669B1 EP 2120669 B1 EP2120669 B1 EP 2120669B1 EP 07858141 A EP07858141 A EP 07858141A EP 07858141 A EP07858141 A EP 07858141A EP 2120669 B1 EP2120669 B1 EP 2120669B1
Authority
EP
European Patent Office
Prior art keywords
washing
dishwasher
control unit
counter
limit
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
EP07858141A
Other languages
German (de)
French (fr)
Other versions
EP2120669A1 (en
Inventor
Atilla Uz
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 PL07858141T priority Critical patent/PL2120669T3/en
Publication of EP2120669A1 publication Critical patent/EP2120669A1/en
Application granted granted Critical
Publication of EP2120669B1 publication Critical patent/EP2120669B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/0057—Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub
    • 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
    • A47L2401/22—Number of operational cycles
    • 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
    • A47L2501/30—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

Definitions

  • the present invention relates to a dishwasher wherein a hygienic environment is maintained in the washing tub.
  • the washing process is performed at a temperature value selected by the user. If the temperature of the wash water is low, for example under 60° C, a layer of bacteria residing at some regions in the washing tub is formed wherein with the lapse of time. Since bacteria are hazardous for the health of the user, they should be removed from the washing tub.
  • the object of the present invention is to design a dishwasher wherein hygiene is maintained in the washing tub.
  • the dishwasher designed to fulfill the objective of the present invention, explicated in the first claim and the respective claims thereof, does not allow the user to perform washing continually at low temperatures.
  • the number of consecutive low temperature washings is limited for removing the bacteria accumulated in the washing tub.
  • the next washing temperature is automatically kept higher.
  • the user is informed by a warning means.
  • performing washing continually at low temperatures is prevented and hygiene is maintained by performing washing at high temperatures at certain intervals.
  • Figure 1 - is the schematic view of a dishwasher.
  • the dishwasher (1) of the present invention comprises a washing tub (2) wherein items to be washed are placed and a control unit (3) that maintains the control of the washing program ( Figure 1 ).
  • a washing temperature (Ty) is also specified for the washing program.
  • the washing temperature (Ty) is the highest temperature for heating the wash water used in the main washing of the washing program.
  • the washing temperature (Ty) is compared with a limit temperature value (T 1 ) kept in the memory of the control unit (3).
  • the limit temperature value (T l ) is determined by the producer and saved in the memory.
  • the limit temperature value (T l ) is a temperature to which the wash water has to reach in order to prevent the formation of bacteria in the washing tub (2).
  • washing temperature (Ty) is lower than the limit temperature value (T 1 )
  • the counter (s) in the memory of the control unit (3) used for counting the number of washing programs is increased by one, otherwise the counter (s) is reset to zero.
  • the number of successive washing programs performed at washing temperatures (Ty) below the limit temperature value (T l ) is counted by the counter (s).
  • the value of the counter (s) is compared with a limit number of washings (n).
  • the limit number of washings (n) is a limit value of washing programs that can be performed successively in the washing tub (2) at washing temperatures (Ty) lower than the limit temperature value (T l ) without allowing the formation of bacteria in the washing tub (2). If the number of washing programs counted by the counter (s) successive equals the limit number of washings (n), the next washing is performed by the control unit (3) at a washing temperature (Ty) that is equal to or higher than the limit temperature (Tl) value. Consequently, the formation of bacteria in the washing tub (2) is prevented.
  • washing temperature (Ty) of a selected washing program is equal to or higher than the limit temperature (Tl) value before the counter (s) successive equals the limit number of washings (n), then the counter (s) is zeroed since hygiene is maintained in the washing tub (2).
  • the washing temperature (Ty) of the next washing program is automatically equaled to the limit temperature (Tl) by the control unit (3).
  • the user can increase this temperature but cannot lower it.
  • the washing process to be performed at the limit temperature (Tl) is postponed by the control unit (3).
  • the dishwasher (1) comprises a warning means (4).
  • the warning means (4) is used for notifying the user by a display or an audio/visual means. If the counter (s) successive equals the limit number of washings (n), then the user is informed through the warning means (4) by the control unit (3) before the next program starts. With this embodiment, the possibility of the user making an error is reduced.
  • the warning means (4) is a display
  • the user is warned by phrases such as "Choose the temperature value to be at least T# for maintaining hygiene” or “Washing will be performed at temperature T#, do not load sensitive items” etc.
  • the bacteria accumulation in the washing tub (2) that may occur when the dishwasher (1) is not operated successively at temperatures that will maintain hygiene is prevented.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Abstract

By means of the present invention, the bacteria accumulation in the washing tub (2) that may occur when the dishwasher (1) is not operated successively at temperatures that will maintain hygiene is prevented.

Description

  • The present invention relates to a dishwasher wherein a hygienic environment is maintained in the washing tub.
  • In dishwashers, the washing process is performed at a temperature value selected by the user. If the temperature of the wash water is low, for example under 60° C, a layer of bacteria residing at some regions in the washing tub is formed wherein with the lapse of time. Since bacteria are hazardous for the health of the user, they should be removed from the washing tub.
  • In dishwashers, in order to provide hygiene in the washing tub, special hygienic programs are accommodated or bacteria accumulation level is measured by using complex methods or cost increasing sensors and the washing program parameters are changed to maintain hygiene.
  • In the state of the art International Patent Application No WO2004-058038 , a dishwasher is explained wherein a biosensor is used to provide hygiene. A dishwasher according to the pre-amble of claim 1 is disclosed by document DE 10 2004 030 013 A1 .
  • The object of the present invention is to design a dishwasher wherein hygiene is maintained in the washing tub.
  • The dishwasher designed to fulfill the objective of the present invention, explicated in the first claim and the respective claims thereof, does not allow the user to perform washing continually at low temperatures. The number of consecutive low temperature washings is limited for removing the bacteria accumulated in the washing tub.
  • In an embodiment of the present invention, if the number of successive washings at low temperature is in excess of a limit value, the next washing temperature is automatically kept higher.
  • In an embodiment of the present invention, the user is informed by a warning means.
  • By means of the present invention, performing washing continually at low temperatures is prevented and hygiene is maintained by performing washing at high temperatures at certain intervals.
  • The dishwasher designed to fulfill the objective of the present invention is illustrated in the attached figures, where:
  • Figure 1 - is the schematic view of a dishwasher.
  • The elements illustrated in the figures are numbered as follows:
    1. 1. Dishwasher
    2. 2. Washing tub
    3. 3. Control unit
    4. 4. Warning means
  • The dishwasher (1) of the present invention comprises a washing tub (2) wherein items to be washed are placed and a control unit (3) that maintains the control of the washing program (Figure 1).
  • When a washing program is selected by the user or when a washing program is started automatically by the dishwasher (1), a washing temperature (Ty) is also specified for the washing program. The washing temperature (Ty) is the highest temperature for heating the wash water used in the main washing of the washing program. The washing temperature (Ty) is compared with a limit temperature value (T1) kept in the memory of the control unit (3).
  • The limit temperature value (Tl) is determined by the producer and saved in the memory. The limit temperature value (Tl) is a temperature to which the wash water has to reach in order to prevent the formation of bacteria in the washing tub (2). When washing process is performed in the dishwasher (1) at the limit temperature value (Tl) hygiene is maintained since temperatures are reached that remove bacteria in the washing tub (2).
  • If the washing temperature (Ty) is lower than the limit temperature value (T1), then the counter (s) in the memory of the control unit (3) used for counting the number of washing programs is increased by one, otherwise the counter (s) is reset to zero. The number of successive washing programs performed at washing temperatures (Ty) below the limit temperature value (Tl) is counted by the counter (s).
  • The value of the counter (s) is compared with a limit number of washings (n). The limit number of washings (n) is a limit value of washing programs that can be performed successively in the washing tub (2) at washing temperatures (Ty) lower than the limit temperature value (Tl) without allowing the formation of bacteria in the washing tub (2). If the number of washing programs counted by the counter (s) successive equals the limit number of washings (n), the next washing is performed by the control unit (3) at a washing temperature (Ty) that is equal to or higher than the limit temperature (Tl) value. Consequently, the formation of bacteria in the washing tub (2) is prevented.
  • If the washing temperature (Ty) of a selected washing program is equal to or higher than the limit temperature (Tl) value before the counter (s) successive equals the limit number of washings (n), then the counter (s) is zeroed since hygiene is maintained in the washing tub (2).
  • In an embodiment of the present invention, if the counter (s) successive equals the limit number of washings (n), the washing temperature (Ty) of the next washing program is automatically equaled to the limit temperature (Tl) by the control unit (3). The user can increase this temperature but cannot lower it.
  • In another embodiment of the present invention, if the counter (s) successive equals the limit number of washings (n) and when a washing program appropriate for washing sensitive items is selected, then the washing process to be performed at the limit temperature (Tl) is postponed by the control unit (3).
  • In another embodiment of the present invention, the dishwasher (1) comprises a warning means (4). The warning means (4) is used for notifying the user by a display or an audio/visual means. If the counter (s) successive equals the limit number of washings (n), then the user is informed through the warning means (4) by the control unit (3) before the next program starts. With this embodiment, the possibility of the user making an error is reduced.
  • In the embodiment wherein the warning means (4) is a display, the user is warned by phrases such as "Choose the temperature value to be at least T# for maintaining hygiene" or "Washing will be performed at temperature T#, do not load sensitive items" etc.
  • By means of the present invention, the bacteria accumulation in the washing tub (2) that may occur when the dishwasher (1) is not operated successively at temperatures that will maintain hygiene is prevented.

Claims (4)

  1. A dishwasher (1) comprising a washing tub (2) wherein items to be washed are placed, a control unit (3) that maintains the control of a washing program and a counter (s) in a memory of the control unit (3) used for counting the number of successive washing programs performed at washing temperatures (Ty) below a limit temperature value (Tl) which is kept in the memory of the control unit (3), characterized in that, the control unit (3) performs the next washing program at a washing temperature (Ty) that is equal to or higher than the limit temperature value (Tl) when the counter (s) showing the number of successive washing programs performed at washing temperatures (Ty) lower than the limit temperature value (Tl) equals a limit number of successive washings (n).
  2. A dishwasher (1) as in Claim 1, characterized by the control unit (3) that automatically equals the washing temperature (Ty) of the next washing program to
    the limit temperature value (Tl) when the counter (s) successively equals the limit number of washings (n).
  3. A dishwasher (1) as in Claim 1, characterized by the control unit (3) that postpones the washing process to be performed at limit temperature value (Tl) if the counter (s) equals the limit number of washings (n) and if a washing successively program appropriate for washing sensitive items is selected.
  4. A dishwasher (1) as in any one of the above claims, characterized by a warning means (4) through which the user is informed by the control unit (3) before
    the next program starts if the counter (s) successively equals the limit number of washings (n).
EP07858141A 2006-12-26 2007-12-26 Dishwasher with temperature increase for hygienic environment Not-in-force EP2120669B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07858141T PL2120669T3 (en) 2006-12-26 2007-12-26 Dishwasher with temperature increase for hygienic environment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200607457 2006-12-26
PCT/EP2007/064544 WO2008077970A1 (en) 2006-12-26 2007-12-26 Dishwasher with temperature increase for hygienic environment

Publications (2)

Publication Number Publication Date
EP2120669A1 EP2120669A1 (en) 2009-11-25
EP2120669B1 true EP2120669B1 (en) 2012-03-28

Family

ID=39166697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07858141A Not-in-force EP2120669B1 (en) 2006-12-26 2007-12-26 Dishwasher with temperature increase for hygienic environment

Country Status (5)

Country Link
EP (1) EP2120669B1 (en)
AT (1) ATE550980T1 (en)
ES (1) ES2383618T3 (en)
PL (1) PL2120669T3 (en)
WO (1) WO2008077970A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8157920B2 (en) 2007-12-12 2012-04-17 Electrolux Home Products, Inc. Control device for a dishwasher appliance and associated method
DE102008040650A1 (en) * 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Flushing process for a water-conducting household appliance
DE202008017432U1 (en) 2008-07-23 2009-12-03 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular a dishwasher
DE102008040647A1 (en) * 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular dishwashing or washing machine
DE102009002147A1 (en) * 2009-04-02 2010-10-14 BSH Bosch und Siemens Hausgeräte GmbH dishwasher
EP2108726A3 (en) * 2009-06-29 2009-10-21 V-Zug AG Washing machine with hygiene display
US8844082B2 (en) * 2010-12-14 2014-09-30 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
US20120144871A1 (en) * 2010-12-14 2012-06-14 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
DE102011001869B4 (en) * 2011-04-07 2013-04-04 Miele & Cie. Kg Method for operating an automatic dishwasher

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364376B1 (en) * 2000-06-29 2002-04-02 The Stanley Works Appliance door latch assembly
DE10238304A1 (en) * 2002-08-21 2004-02-26 BSH Bosch und Siemens Hausgeräte GmbH Adaptive dishwashing program, compensates for water softening system deficiencies during operation
US7708837B2 (en) * 2002-12-25 2010-05-04 Ayla Kuran Dishwasher and corresponding control method
DE102004030013A1 (en) * 2004-06-22 2006-01-12 Premark Feg L.L.C. (N.D.Ges.D. Staates Delaware), Wilmington Dishwasher and operating method for a dishwasher
EP1658803B1 (en) * 2004-11-20 2011-06-01 Electrolux Home Products Corporation N.V. Dishwasher having a program option and dishwashing cycle

Also Published As

Publication number Publication date
ATE550980T1 (en) 2012-04-15
EP2120669A1 (en) 2009-11-25
WO2008077970A1 (en) 2008-07-03
PL2120669T3 (en) 2012-06-29
ES2383618T3 (en) 2012-06-22

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