EP2175766A1 - A dishwasher - Google Patents
A dishwasherInfo
- Publication number
- EP2175766A1 EP2175766A1 EP08774611A EP08774611A EP2175766A1 EP 2175766 A1 EP2175766 A1 EP 2175766A1 EP 08774611 A EP08774611 A EP 08774611A EP 08774611 A EP08774611 A EP 08774611A EP 2175766 A1 EP2175766 A1 EP 2175766A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dishwasher
- turbidity
- water
- pump motor
- speed
- 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.)
- Granted
Links
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
- A47L15/42—Details
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
-
- 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
Definitions
- the present invention relates to dishwashers comprising a turbidity sensor.
- a washing program is implemented that is comprised of various steps such as pre-washing, main washing and rinsing.
- turbidity sensors are used for detecting the dirt of the dishes placed in the machine or whether the dishes are properly cleaned after washing.
- these turbidity sensors used are affected by factors such as intake of water into the washing chamber and the rotational speed of the spray arms and as a result the measurement cannot be performed accurately.
- the aim of the present invention is the realization of a dishwasher wherein the program and program parameter selection based on turbidity detection is made with high accuracy.
- a turbidity sensor is used for measuring the turbidity of water in order to detect the dirt amount of the dishes for determining the washing program steps and the parameters such as water temperature, duration etc. relating to these steps.
- the turbidity sensor performs all the measurement activities while the working conditions of the spray arms are at a constant value predetermined by the producer.
- the turbidity sensor takes measurements only while the upper spray arm is rotating. Accordingly, measurement is taken while water is sprayed into the washing chamber with a lower pressure thereby minimizing the deviation in the measurement.
- the turbidity measurements are taken while both of the spray arms are rotating. Thus, measurements are made with identical deviations without disrupting the normal working process by taking the measurement in a frequent condition of the dishwasher during washing.
- the turbidity is measured while the speed of the pump motor actuating the spray arms is at value predetermined by the producer.
- the speed of the pump motor predetermined by the producer for taking measurements is not a speed at which the pump motor operates normally during the program steps of the dishwasher. For example, while the pump motor is operated at 2500-3000 rpm speed, the speed of the pump motor is reduced to 1500 rpm and measurement is performed when the turbulence that will cause deviation in the sprayed water is lower.
- Figure 1 - is the schematic view of a dishwasher.
- the dishwasher (1) provides cleaning of the dishes in accordance with a washing program that includes at least some of the various steps like pre-washing, main washing, rinsing, drying, regeneration.
- the dishwasher (1) comprises a washing chamber (2) wherein the dishes to be washed are emplaced, at least one spray arm (4, 104) that sprays water on the dishes while rotating around its axis, at least one pump motor (3) for the water to be circulated and to be sprayed from the spray arms (4, 104), at least one turbidity sensor (5) that performs the wash water turbidity measurements in order to detect the dirtiness of the dishes while the speed (w) of the pump motor (3) is only at a constant value predetermined by the producer and/or while water is directed to always the same spray arm/spray arms (4, 104) ( Figure 1).
- two spray arms (4, 104), an upper (4) one and a lower (104) one, are used.
- the turbidity sensor (5) takes measurements only while the upper spray arm (4) is rotating.
- the turbidity sensor (5) takes measurements while both of the spray arms (4, 104) are rotating.
- a variable speed, brushless direct current pump motor (3) is used.
- the turbidity sensor (5) takes measurements while the speed (w) of the pump motor (3) is at a value (w m ) predetermined by the producer.
- the speed (w m ) of the pump motor (3) predetermined by the producer for taking measurements is a speed not normally used by the pump motor (3) during the program steps of the dishwasher (1).
- the speed of the pump motor (3) is reduced to 1500 rpm and turbidity measurement is performed at this speed.
- the deviation in the measurement of the turbidity sensor (5) caused by the turbulence generated due to the speed and direction of water intake into the washing chamber (2) or the motion of the spray arms (4, 104) during the washing steps is maintained to be constant thereby increasing the accuracy in selections of program and program parameters performed in accordance with the data received from the turbidity sensor (5).
Landscapes
- Washing And Drying Of Tableware (AREA)
- Harvesting Machines For Specific Crops (AREA)
- Table Devices Or Equipment (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL08774611T PL2175766T3 (en) | 2007-07-02 | 2008-07-02 | A dishwasher |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR200704577 | 2007-07-02 | ||
| PCT/EP2008/058468 WO2009004014A1 (en) | 2007-07-02 | 2008-07-02 | A dishwasher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2175766A1 true EP2175766A1 (en) | 2010-04-21 |
| EP2175766B1 EP2175766B1 (en) | 2010-10-06 |
Family
ID=39720111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08774611A Active EP2175766B1 (en) | 2007-07-02 | 2008-07-02 | A dishwasher |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2175766B1 (en) |
| AT (1) | ATE483392T1 (en) |
| DE (1) | DE602008002949D1 (en) |
| PL (1) | PL2175766T3 (en) |
| WO (1) | WO2009004014A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024039084A1 (en) | 2022-08-16 | 2024-02-22 | 엘지전자 주식회사 | Dishwasher |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1392420B1 (en) † | 2008-12-22 | 2012-03-02 | Indesit Co Spa | DISHWASHER. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040079400A1 (en) * | 2002-10-25 | 2004-04-29 | Young Raymond A. | Dishwasher having a variable speed circulation pump controlled responsive to sensed turbidity |
| DE10319467B3 (en) * | 2003-04-29 | 2004-07-22 | Miele & Cie. Kg | Device for preventing foam or air bubbles in measuring zone of turbidity sensor for dishwasher or laundry machine with turbulence region incorporated in bypass line across main flow line |
| DE10359841A1 (en) * | 2003-12-19 | 2005-07-21 | Electrolux Home Products Corporation N.V. | Dishwasher with a liquid distribution device and method for switching the same |
| US7588038B2 (en) * | 2004-06-05 | 2009-09-15 | Lg Electronics Inc. | Sump assembly for dishwasher |
| KR20060010361A (en) * | 2004-07-28 | 2006-02-02 | 엘지전자 주식회사 | Turbidity sensor mounting structure of the dishwasher |
-
2008
- 2008-07-02 DE DE602008002949T patent/DE602008002949D1/en active Active
- 2008-07-02 WO PCT/EP2008/058468 patent/WO2009004014A1/en not_active Ceased
- 2008-07-02 AT AT08774611T patent/ATE483392T1/en not_active IP Right Cessation
- 2008-07-02 PL PL08774611T patent/PL2175766T3/en unknown
- 2008-07-02 EP EP08774611A patent/EP2175766B1/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009004014A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024039084A1 (en) | 2022-08-16 | 2024-02-22 | 엘지전자 주식회사 | Dishwasher |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009004014A1 (en) | 2009-01-08 |
| ATE483392T1 (en) | 2010-10-15 |
| EP2175766B1 (en) | 2010-10-06 |
| DE602008002949D1 (en) | 2010-11-18 |
| PL2175766T3 (en) | 2011-01-31 |
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