WO2003059142A1 - Method for improving the washing performance of a dishwasher - Google Patents

Method for improving the washing performance of a dishwasher Download PDF

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Publication number
WO2003059142A1
WO2003059142A1 PCT/TR2002/000072 TR0200072W WO03059142A1 WO 2003059142 A1 WO2003059142 A1 WO 2003059142A1 TR 0200072 W TR0200072 W TR 0200072W WO 03059142 A1 WO03059142 A1 WO 03059142A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
washing
washing tub
sump
way valve
Prior art date
Application number
PCT/TR2002/000072
Other languages
French (fr)
Inventor
Gökhan ÖZGÜREL
Ayla Kuran
Bülent KÜÇÜKCOSKUN
Songül BAYRAKTAR
Original Assignee
Arçelik A.S.
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 Arçelik A.S. filed Critical Arçelik A.S.
Priority to AU2002367006A priority Critical patent/AU2002367006A1/en
Publication of WO2003059142A1 publication Critical patent/WO2003059142A1/en

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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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the present invention relates to a method that provides an improved washing performance in the dishwashers.
  • the operational cycle of the dish washers consists, in general, of the pre- washing, main washing, rinsing and drying phases.
  • the rinsing phase comprises at least two parts, namely, first rinsing and last rinsing.
  • the pre-washing and first rinsing phases are generally realized by using cold water, whereas for the main washing and last rinsing phases, warm water is used. For delicate material, such as glass ware, passing from a warm phase to a cold phase creates a thermal shock effect and the risk of glass corrosion.
  • the first rinsing step is realized by using cold or lukewarm water and the last rinsing step is realized at a temperature above 50°C degrees in order to activate the rinsing agent used.
  • the dishwasher may operate at a temperature between 40-65°C according to the program chosen by the user, during the main washing stage, before the first rinsing.
  • water used for the first rinsing is received directly from the water inlet and may be cold. These fluctuations of temperature in subsequent stages have negative impacts on the delicate objects being washed in the dishwasher, such as the glassware.
  • the main washing water is taken in the machine during pre-washing phase and is warmed by circulating it around the washing tank, thus providing economy of time.
  • the object of the present invention is to enhance the washing performance of the dishwashers.
  • Figure 1 is the schematic view of the dishwasher.
  • the dish washer (1) comprises a washing tub (2) in which the objects to be washed are placed, a sump (3) at the lower portion of the washing tub (2), wherein water in the washing tub (2) is collected during the washing process, a heater (8) used for heating the washing water, a circulation pump (4) that directs the water collected in the sump (3) back to the washing tub (2), a discharge pump (5) for discharging the water collected in the sump (3) to outside the dishwasher (1) at the end of the washing process, a multi-way valve (6) connected to the outlet of the circulation pump (4) and a by-pass line (7) that connects the sump (3) and the multi-way valve (6).
  • washing process is generally realized in four stages, namely, pre-washing, main washing, rinsing and drying.
  • prewashing step is realized, wherein the coarse dirt of the objects placed in the dishwasher is removed.
  • the rinsing step comprising at least two phases is started in order to clean off the detergent remained on the objects washed during the main washing step.
  • the washing process is completed by the realization of the drying step, to dry the objects after the first and second rinsing steps.
  • the washing step wherein cold water is used such as in the first rinsing step
  • water is taken in the disk washer (1), and the circulation pump (4) is activated by the control unit.
  • Water in the sump (3) is sucked in by the multi-way valve (6) and directed back to the sump (3) over the by-pass line (7).
  • the heater (8) is activated to subject the water to a pre-heating process, and said multi-way valve (6) is kept active until water attains the desired temperature, preferably 35-40°C. After this point when the water reaches a temperature of the desired level, the multi-way valve (6) is switched off and washing step is carried on.
  • the multiway valve (6) is placed downstream of the discharge pump (5) and the by-pass line (7) connects the multi-way valve (6) with the sump (3).
  • the process of preheating the water, in the washing steps wherein cold water is used, coming after the steps using warm water, e.g. main washing step; such as the first rinsing step, is optional, i.e. left to the choice of the user.
  • the user can switch on or off said preheating function by means of a button.
  • the washing cycle realized by using water at a temperature of 35-40°C, instead of cold water, provides protection against thermal shock and glass corrosion risks, for the delicate objects, particularly the glass-and cut-glass ware.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

The present invention relates to a dishwasher (1) comprising a wash tub (2), a sump (3), a circulation pump (4), a multi-way valve (6) and a heater (8) placed in the washing tub (2); wherein water is taken into the dish washer in the washing steps wherein cold water is used, such as the first rinsing step, coming after the steps using warm water, e.g. main washing step; and is heated during circulation.

Description

METHOD FOR IMRPOVING THE WASHING PERFORMANCE OF A DISHWASHER
The present invention relates to a method that provides an improved washing performance in the dishwashers.
The operational cycle of the dish washers consists, in general, of the pre- washing, main washing, rinsing and drying phases. The rinsing phase comprises at least two parts, namely, first rinsing and last rinsing. The pre-washing and first rinsing phases are generally realized by using cold water, whereas for the main washing and last rinsing phases, warm water is used. For delicate material, such as glass ware, passing from a warm phase to a cold phase creates a thermal shock effect and the risk of glass corrosion. The first rinsing step is realized by using cold or lukewarm water and the last rinsing step is realized at a temperature above 50°C degrees in order to activate the rinsing agent used. The dishwasher may operate at a temperature between 40-65°C according to the program chosen by the user, during the main washing stage, before the first rinsing. In spite of the high temperature values attained during the main washing and last rinsing stages, water used for the first rinsing is received directly from the water inlet and may be cold. These fluctuations of temperature in subsequent stages have negative impacts on the delicate objects being washed in the dishwasher, such as the glassware.
In the German Patent No. 2730489, water to be used in the rinsing phases is taken to an auxiliary water tank during the previous phases, thus water is tepefied here by heat transfer. In this way, water received from outside the machine for rinsing is not used directly, a more tepid water is used.
In the German Patent No. 19758064, the main washing water is taken in the machine during pre-washing phase and is warmed by circulating it around the washing tank, thus providing economy of time. The object of the present invention is to enhance the washing performance of the dishwashers.
The method for improving the washing performance in dish washers, developed to attain the object of the present invention has been illustrated in the attached drawing, wherein:
Figure 1 is the schematic view of the dishwasher.
The components shown in the drawing have been enumerated separately as shown below:
1. Dish washer
2. Washing tub 3. Sump
4. Circulation pump
5. Discharge pump
6. Multi-way valve
7. By-pass line 8. Heater
The dish washer (1) comprises a washing tub (2) in which the objects to be washed are placed, a sump (3) at the lower portion of the washing tub (2), wherein water in the washing tub (2) is collected during the washing process, a heater (8) used for heating the washing water, a circulation pump (4) that directs the water collected in the sump (3) back to the washing tub (2), a discharge pump (5) for discharging the water collected in the sump (3) to outside the dishwasher (1) at the end of the washing process, a multi-way valve (6) connected to the outlet of the circulation pump (4) and a by-pass line (7) that connects the sump (3) and the multi-way valve (6). In the dishwashers (1), washing process is generally realized in four stages, namely, pre-washing, main washing, rinsing and drying. When the dishwasher (1) starts to run, first the prewashing step is realized, wherein the coarse dirt of the objects placed in the dishwasher is removed. After the completion of the prewashing step, the objects are cleaned from all dirts and fatty subtances in the main washing step. Then, the rinsing step comprising at least two phases is started in order to clean off the detergent remained on the objects washed during the main washing step. The washing process is completed by the realization of the drying step, to dry the objects after the first and second rinsing steps.
Following the steps using warm water, such as main washing, in the washing step wherein cold water is used, such as in the first rinsing step, water is taken in the disk washer (1), and the circulation pump (4) is activated by the control unit. Water in the sump (3) is sucked in by the multi-way valve (6) and directed back to the sump (3) over the by-pass line (7). Meanwhile the heater (8) is activated to subject the water to a pre-heating process, and said multi-way valve (6) is kept active until water attains the desired temperature, preferably 35-40°C. After this point when the water reaches a temperature of the desired level, the multi-way valve (6) is switched off and washing step is carried on.
In another embodiment of the present invention, the multiway valve (6) is placed downstream of the discharge pump (5) and the by-pass line (7) connects the multi-way valve (6) with the sump (3).
In another embodiment of the present invention, the process of preheating the water, in the washing steps wherein cold water is used, coming after the steps using warm water, e.g. main washing step; such as the first rinsing step, is optional, i.e. left to the choice of the user. The user can switch on or off said preheating function by means of a button. The washing cycle realized by using water at a temperature of 35-40°C, instead of cold water, provides protection against thermal shock and glass corrosion risks, for the delicate objects, particularly the glass-and cut-glass ware.

Claims

1. A method for improving the washing performance of a dishwasher (1) which comprises a washing tub (2) in which the objects to be washed are placed, a sump (3) at the lower portion of the washing tub (2), wherein water in the washing tub (2) is collected during the washing process, a circulation pump (4) that directs the water collected in the sump (3) back to the washing tub (2), a multi-way valve (6) connected to the outlet of the circulation pump (4) and a heater (8) placed in the washing tub (2); comprising the steps of:
- water in take to the dish washer in the washing steps wherein cold water is used, such as the first rinsing step, coming after the steps using warm water, e.g. main washing step;
- starling the circulation pump (4); - directing the water in the sump (3) to the multi- ay valve (6), by the circulation pump (4);
- directing the water back to the washing tub (2) by the multi-way valve (6),
- meanwhile starting the heater (8) and switching off the multi-way valve (6) after the temperature of water attains the desired level.
2. A method for improving the washing performance of a dishwasher (1) which comprises a washing tub (2) in which the objects to be washed are placed, a sump (3) at the lower portion of the washing tub (2), wherein water present in the washing tub (2) is collected during the washing process, a discharge pump (5) for discharging the water collected in the sump (3) to outside the dishwasher (1) at the end of the washing process, a multi- way valve (6) connected to the outlet of the discharge pump (5) and a heater (8) placed in the washing tub (2); comprising the steps of: - water intake to the dish washer in the washing steps wherein cold water is used, such as the first rinsing step, coming after the steps using warm water, e.g. main washing step;
- starting the discharge pump (5); - directing the water in the sump (3) to the multi-way valve (6) by the discharge pump (5);
- directing the water back to the washing tub (2) by the multi-way valve (6),
- meanwhile starting the heater (8) and switching of the discharge pump (5) after the temperature of water attains the desired level.
PCT/TR2002/000072 2001-12-27 2002-12-26 Method for improving the washing performance of a dishwasher WO2003059142A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002367006A AU2002367006A1 (en) 2001-12-27 2002-12-26 Method for improving the washing performance of a dishwasher

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2001/03735 2001-12-27
TR200103735 2001-12-27

Publications (1)

Publication Number Publication Date
WO2003059142A1 true WO2003059142A1 (en) 2003-07-24

Family

ID=21623586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2002/000072 WO2003059142A1 (en) 2001-12-27 2002-12-26 Method for improving the washing performance of a dishwasher

Country Status (2)

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AU (1) AU2002367006A1 (en)
WO (1) WO2003059142A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006001609A1 (en) * 2004-06-24 2006-01-05 Lg Electronics, Inc. Heater-mounting structure of dish washer, and the heater
WO2014180648A1 (en) 2013-05-06 2014-11-13 Arcelik Anonim Sirketi A dishwasher with improved drying performance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847666A (en) * 1973-05-24 1974-11-12 Gen Motors Corp Water heating system for a dishwasher
US4279384A (en) * 1978-07-05 1981-07-21 Sharp Kabushiki Kaisha Steam generation in a dishwasher
EP0483466A1 (en) * 1990-10-30 1992-05-06 Zanussi Elettrodomestici S.p.A. Washing process for an automatic dishwasher
EP0585905A2 (en) * 1992-09-04 1994-03-09 Daewoo Electronics Co., Ltd Dishwashing machine
US5331984A (en) * 1992-04-08 1994-07-26 Kabushiki Kaisha Toshiba Dishwasher
EP0744150A1 (en) * 1995-05-26 1996-11-27 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Dishwashing machine with electric heating means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847666A (en) * 1973-05-24 1974-11-12 Gen Motors Corp Water heating system for a dishwasher
US4279384A (en) * 1978-07-05 1981-07-21 Sharp Kabushiki Kaisha Steam generation in a dishwasher
EP0483466A1 (en) * 1990-10-30 1992-05-06 Zanussi Elettrodomestici S.p.A. Washing process for an automatic dishwasher
US5331984A (en) * 1992-04-08 1994-07-26 Kabushiki Kaisha Toshiba Dishwasher
EP0585905A2 (en) * 1992-09-04 1994-03-09 Daewoo Electronics Co., Ltd Dishwashing machine
EP0744150A1 (en) * 1995-05-26 1996-11-27 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Dishwashing machine with electric heating means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006001609A1 (en) * 2004-06-24 2006-01-05 Lg Electronics, Inc. Heater-mounting structure of dish washer, and the heater
WO2014180648A1 (en) 2013-05-06 2014-11-13 Arcelik Anonim Sirketi A dishwasher with improved drying performance
US9763555B2 (en) 2013-05-06 2017-09-19 Arcelik Anonim Sirketi Dishwasher with improved drying performance

Also Published As

Publication number Publication date
AU2002367006A1 (en) 2003-07-30

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