US20030196278A1 - Static and dynamic turbidity sensing in a washing appliance - Google Patents

Static and dynamic turbidity sensing in a washing appliance Download PDF

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Publication number
US20030196278A1
US20030196278A1 US10/126,404 US12640402A US2003196278A1 US 20030196278 A1 US20030196278 A1 US 20030196278A1 US 12640402 A US12640402 A US 12640402A US 2003196278 A1 US2003196278 A1 US 2003196278A1
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US
United States
Prior art keywords
detergent
method
turbidity
water
sensing
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.)
Abandoned
Application number
US10/126,404
Inventor
Anthony Durfee
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.)
Maytag Corp
Original Assignee
Maytag Corp
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 Maytag Corp filed Critical Maytag Corp
Priority to US10/126,404 priority Critical patent/US20030196278A1/en
Assigned to MAYTAG CORPORATION reassignment MAYTAG CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DURFEE, ANTHONY L.
Publication of US20030196278A1 publication Critical patent/US20030196278A1/en
Abandoned legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/0018Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049Detection or prevention of malfunction, including accident prevention
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14Arrangements for detecting or measuring specific parameters
    • D06F34/22Condition of the washing liquid, e.g. turbidity
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4297Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005Methods for washing, rinsing or spin-drying
    • D06F35/006Methods for washing, rinsing or spin-drying for washing or rinsing only
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/44Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/02Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/023Quantity or concentration of the consumable product
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/10Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/26Indication or alarm to the controlling device or to the user
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output 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
    • A47L2501/30Regulation 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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2202/00Input, e.g. measuring, checking variables
    • D06F2202/02Chemical variables; Condition of the washing liquid

Abstract

A method is provided for measuring detergent and soil in wash water of a dishwashing or clothes washing appliance. A turbidity sensor is used to sense or measure the soil in the water in a static state, and to sense or measure the detergent in the water during a dynamic state. The turbidity sensor generates a corresponding output signal which is sent to a microprocessor to automatically adjust machine cycles to increase operational efficiencies.

Description

    BACKGROUND OF THE INVENTION
  • The use of turbidity sensors in dishwashing machines and clothes washing machines is well known. The sensors typically measure the amount of food, soil or dirt in the wash water, with the water being recirculated until a predetermined level of soil has accumulated, after which the dirty water is drained. [0001]
  • “Smart” dishwashers have been developed which automatically determine particular parameters to adjust the operation of the dishwasher. For example, in Applicant's U.S. Pat. No. 5,797,409, the presence of a rinse aid is detected by measuring turbidity of the water after the rinse aid should have been dispensed and comparing the measured turbidity to a known turbidity for clear water using a turbidity sensor. If no rinse aid is detected, additional time is added to the drying cycle. [0002]
  • Similarly, U.S. Pat. No. 5,331,177 discloses a “smart” dishwasher which utilizes turbidity caused only by detergent, so as to automatically abort the cycle and save energy. [0003]
  • Dish and clothes washing appliances have two distinct operational states. First, the washer has a static state in which no components are in motion that cause disturbance within the wash water. Secondly, the washer has a dynamic state wherein one or more components are disturbing the wash water. A turbidity sensor is typically extremely sensitive to detergent in the wash water when the washer is in a dynamic state, and far less sensitive to detergent in the wash water when the washing machine is in a static state. [0004]
  • Accordingly, a primary objective of the present invention is the use of a turbidity sensor in a washing appliance to sense soil or dirt within the wash water when the washer is in a static state, and to sense detergent in the wash water when the washer is in a dynamic state. [0005]
  • Another objective of the present invention is the provision of measuring detergent and soil in wash water of a washing appliance so as to allow adjustments in the operational cycles of the appliance. [0006]
  • A further objective of the present invention is the provision of a method for determining the presence of detergent and soil in wash water of a clothes washing machine or dishwasher, with the appliance automatically making cyclical adjustments in response to the presence or absence of detergent and/or soil in the water. [0007]
  • Another objective of the present invention is the provision of a method for verifying that detergent has been properly dispensed in a dishwashing machine or clothes washing machine. [0008]
  • Another objective of the present invention is the provision of a method for minimizing or eliminating detergent-induced spotting on items in a dishwasher. [0009]
  • Another objective of the present invention is the provision of an improved smart washing appliance which automatically responds to wash water turbidity in the static and dynamic states. [0010]
  • These and other objectives will become apparent from the following description of the invention. [0011]
  • SUMMARY OF THE INVENTION
  • A method is provided for measuring detergent and soil in wash water of a dishwashing machine and clothes washing machine, wherein the soil is sensed or measured during a static state and the detergent is sensed or measured during a dynamic state using a turbidity sensor. The detergent is sensed both before and after a detergent dispensing operation to determine that detergent is properly dispensed. Lack of detergent identifies when a bulk detergent dispenser is empty or the dispenser is malfunctioning. Cycle decisions, such as the length of the final rinse, can be made based upon the detergent level in the wash water. Cycle decisions can also be made based upon the sensing of the soil in the wash water, such as the need for a longer wash cycle.[0012]
  • DETAILED DESCRIPTION OF THE INVENTION
  • Dishwashers and clothes washers have two distinct operational states that exist during the operation of the appliance. The static state is one in which no components, such as pumps and heaters, are active, such that there is no disturbance within the wash water. The dynamic state is one in which one or more components are active, and by their nature, cause a disturbance in the wash water. [0013]
  • An analog turbidity sensor can be designed for two characteristics to occur. First, the sensor is extremely sensitive to detergent in the wash water when the appliance is in a dynamic state. Second, the sensor is far less sensitive to detergent in the wash water when the appliance is in the static state. These characteristics allow the turbidity sensor to be used to sense soil within the wash water during the static state, and to sense detergent in the wash water when the appliance is in the dynamic state. Accordingly, turbidity measurements by the turbidity sensor can be used to make automatic cycle decisions based upon either the soil or the detergent content of the wash water. [0014]
  • For example, during the prewash cycle of the machine, the soil content of the water can be sensed and measured by the turbidity sensor, with the output being used by a microprocessor in the machine to automatically adjust the wash cycle to ensure adequate washing. As another example, the same turbidity sensor can be used to sense and measure the detergent content of the wash water in the final rinse cycle of the machine, with the microprocessor automatically adjusting the cycle to reduce or eliminate detergent. In a dishwasher, such sensing and cycle adjustment will minimize detergent-induced spotting on the dishes, glasses and silverware. If the sensed level of detergent is above a preset threshold level, an extra rinse cycle can be automatically added so as to eliminate the detergent-induced spotting. [0015]
  • The method of measuring or determining detergent in the wash water also allows verification that detergent has been properly dispensed into the wash water of the clothes washing machine or dishwashing machine. More particularly, the turbidity of the water is measured both before and after the detergent dispensing operation to verify that the appropriate change in the turbidity sensor output has taken place. In a machine with a bulk detergent dispenser, this process can be used to indicate that the dispenser has run out of detergent or is malfunctioning. [0016]
  • As an alternative, the turbidity sensor can also be used during the dynamic status to determine the presence of both soil and detergent in the wash water and generate an output signal to which the microprocessor can react to adjust the operational cycles accordingly. [0017]
  • Thus, the method of determining the presence of detergent and soil in the wash water, according to the present invention, allows various decisions to be made regarding the various washing cycles, so that alterations can be automatically made to increase efficiency based upon signals from the turbidity sensor in both the static and dynamic states. [0018]
  • The invention has been shown and described above with the preferred embodiments, and it is understood that many modifications, substitutions, and additions may be made which are within the intended spirit and scope of the invention. From the foregoing, it can be seen that the present invention accomplishes at least all of its stated objectives. [0019]

Claims (25)

What is claimed is:
1. A method of measuring detergent and soil in wash water of a washing appliance, comprising:
sensing soil in the water when the appliance is in a static state; and
sensing detergent in the water when the appliance is in a dynamic state.
2. The method of claim 1 wherein the sensing of soil and detergent is accomplished with a turbidity sensor.
3. The method of claim 1 wherein the detergent is sensed before a detergent dispensing operation.
4. The method of claim 1 wherein the detergent is sensed after a detergent dispensing operation.
5. The method of claim 1 wherein the detergent is sensed both before and after a detergent dispensing operation.
6. The method of claim 1 further comprising making cycle decisions based on the sensing of the soil.
7. The method of claim 6 wherein the cycle decision relates to a wash cycle.
8. The method of claim 1 further comprising making cycle decisions based on the sensing of the detergent.
9. The method of claim 8 wherein the cycle decision relates to a final rinse.
10. The method of claim 1 wherein the sensing of detergent verifies that detergent has been dispensed into the water.
11. The method of claim 1 wherein the sensing of detergent identifies when a bulk detergent dispenser is empty.
12. The method of claim 1 wherein the sensing of detergent identifies malfunctioning of a detergent dispenser.
13. The method of claim 1 wherein the sensing of detergent allows for cycle adjustment to minimize detergent-induced spotting on items in the washing appliance.
14. A method of determining the presence of detergent and soil in wash water of a washing appliance, comprising:
measuring the water turbidity during a static state, with the turbidity correlating to soil in the water; and
measuring water turbidity during a dynamic state, with the turbidity correlating to detergent in the water.
15. The method of claim 14 wherein the turbidity is measured using a turbidity sensor.
16. The method of claim 14 wherein the turbidity in the dynamic state is measured before a detergent dispensing operation.
17. The method of claim 14 wherein the turbidity in the dynamic state is measured after a detergent dispensing operation.
18. The method of claim 14 wherein the turbidity in the dynamic state is measured before and after a detergent dispensing operation.
19. The method of claim 14 further comprising making cycle decisions based on the turbidity measurements.
20. The method of claim 19 wherein the cycle decision relates to a final rinse.
21. The method of claim 19 wherein the cycle decision relates to a wash cycle.
22. The method of claim 14 wherein measuring turbidity in the dynamic state verifies that detergent has been dispensed into the water.
23. The method of claim 14 wherein measuring turbidity in the dynamic state identifies when a bulk detergent dispenser is empty.
24. The method of claim 14 wherein measuring turbidity in the dynamic state identifies functioning of a detergent dispenser.
25. The method of claim 14 wherein measuring turbidity in the dynamic state allows for cycle adjustment to minimize detergent-induced spotting on items in the appliance.
US10/126,404 2002-04-19 2002-04-19 Static and dynamic turbidity sensing in a washing appliance Abandoned US20030196278A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/126,404 US20030196278A1 (en) 2002-04-19 2002-04-19 Static and dynamic turbidity sensing in a washing appliance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/126,404 US20030196278A1 (en) 2002-04-19 2002-04-19 Static and dynamic turbidity sensing in a washing appliance
CA002421531A CA2421531A1 (en) 2002-04-19 2003-03-10 Static and dynamic turbidity sensing in a washing appliance

Publications (1)

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US20030196278A1 true US20030196278A1 (en) 2003-10-23

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CA (1) CA2421531A1 (en)

Cited By (18)

* Cited by examiner, † Cited by third party
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
US20050022314A1 (en) * 2003-07-30 2005-02-03 Hal Ambuter Processes
US20080128001A1 (en) * 2006-12-05 2008-06-05 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
US20080128000A1 (en) * 2006-12-04 2008-06-05 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
US20090159099A1 (en) * 2005-10-19 2009-06-25 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher and Operating Method for Dishwasher
US20090205680A1 (en) * 2008-02-15 2009-08-20 Electrolux Home Products, Inc. Washing appliance and associated method
EP2206457A1 (en) * 2009-01-07 2010-07-14 Electrolux Home Products Corporation N.V. Detection of detergent
US20110088724A1 (en) * 2009-10-21 2011-04-21 Whirlpool Corporation Rinse aid release detection method
WO2011049806A1 (en) * 2009-10-23 2011-04-28 Premark Feg L.L.C. Warewash machine with soil detection and method of detecting soiling in such a warewash machine
US20110141474A1 (en) * 2009-12-10 2011-06-16 Paul Lapham Measurement method
NL2005282C2 (en) * 2010-08-27 2012-02-28 Christeyns N V Method and device for washing textile.
US8321983B2 (en) 2010-10-05 2012-12-04 Whirlpool Corporation Method for controlling a cycle of operation in a laundry treating appliance
US10161075B2 (en) 2016-06-30 2018-12-25 Midea Group Co., Ltd. Laundry washing machine with automatic detection of detergent deficit
US10161074B2 (en) 2016-06-30 2018-12-25 Midea Group Co., Ltd. Laundry washing machine with automatic detergent dispensing and/or rinse operation type selection
WO2019046567A3 (en) * 2017-08-30 2019-04-11 Daniels Ralph G Method and system for dispensing laundry chemistry based upon ozone concentration
US10273622B2 (en) 2016-06-30 2019-04-30 Midea Group Co., Ltd. Laundry washing machine with automatic selection of load type
US10358760B2 (en) 2016-06-30 2019-07-23 Midea Group Co., Ltd. Laundry washing machine with automatic rinse operation type selection
US10390675B2 (en) 2015-06-01 2019-08-27 Illinois Tool Works Inc. Warewash machine cleaning notification and in-situ dilution process

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US5957144A (en) * 1998-05-18 1999-09-28 Maytag Corporation Turbidity sensor that interrupts drain motor and water valve
US6536243B2 (en) * 1999-12-07 2003-03-25 Kabushiki Kaisha Toshiba Drum type washing machine with turbidity sensor
US6544344B2 (en) * 2001-07-27 2003-04-08 General Electric Company Dishwasher including a turbidity sensor
US6761179B2 (en) * 1999-09-16 2004-07-13 Bsh Bosch Und Siemens Hausgerate Gmbh Device for monitoring the functioning of a rotating liquid-discharging appliance

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US5438507A (en) * 1993-06-19 1995-08-01 Goldstar Co., Ltd. Method of and apparatus for controlling washing operation of washer
US5957144A (en) * 1998-05-18 1999-09-28 Maytag Corporation Turbidity sensor that interrupts drain motor and water valve
US6761179B2 (en) * 1999-09-16 2004-07-13 Bsh Bosch Und Siemens Hausgerate Gmbh Device for monitoring the functioning of a rotating liquid-discharging appliance
US6536243B2 (en) * 1999-12-07 2003-03-25 Kabushiki Kaisha Toshiba Drum type washing machine with turbidity sensor
US6544344B2 (en) * 2001-07-27 2003-04-08 General Electric Company Dishwasher including a turbidity sensor

Cited By (32)

* Cited by examiner, † Cited by third party
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
US20070102030A1 (en) * 2002-10-25 2007-05-10 Electrolux Home Products, Inc. Dishwasher having a variable speed circulation pump controlled responsive to sensed turbidity
US20050022314A1 (en) * 2003-07-30 2005-02-03 Hal Ambuter Processes
US8663394B2 (en) * 2005-10-19 2014-03-04 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher including additive feeder used in conjunction with setting a pressure for washing dishes, and method thereof
US20090159099A1 (en) * 2005-10-19 2009-06-25 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher and Operating Method for Dishwasher
US20080128000A1 (en) * 2006-12-04 2008-06-05 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
EP1929925A2 (en) * 2006-12-04 2008-06-11 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
EP1929925A3 (en) * 2006-12-04 2009-04-15 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
EP1929919A2 (en) * 2006-12-05 2008-06-11 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
EP1929919A3 (en) * 2006-12-05 2009-04-22 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
US20080128001A1 (en) * 2006-12-05 2008-06-05 Samsung Electronics Co., Ltd. Washing control apparatus and method of dish washing machine
US20090205680A1 (en) * 2008-02-15 2009-08-20 Electrolux Home Products, Inc. Washing appliance and associated method
US8506725B2 (en) 2008-02-15 2013-08-13 Electrolux Home Products, Inc. Washing appliance and associated method
EP2206457A1 (en) * 2009-01-07 2010-07-14 Electrolux Home Products Corporation N.V. Detection of detergent
US8540820B2 (en) * 2009-10-21 2013-09-24 Whirlpool Corporation Rinse aid release detection method
US20140014147A1 (en) * 2009-10-21 2014-01-16 Whirlpool Corporation Rinse aid release detection method
US8968486B2 (en) * 2009-10-21 2015-03-03 Whirlpool Corporation Rinse aid release detection method
US20110088724A1 (en) * 2009-10-21 2011-04-21 Whirlpool Corporation Rinse aid release detection method
WO2011049806A1 (en) * 2009-10-23 2011-04-28 Premark Feg L.L.C. Warewash machine with soil detection and method of detecting soiling in such a warewash machine
CN102595994A (en) * 2009-10-23 2012-07-18 浦瑞玛柯Feg有限责任公司 Warewash machine with soil detection and method of detecting soiling in such a warewash machine
US20110141474A1 (en) * 2009-12-10 2011-06-16 Paul Lapham Measurement method
US8681334B2 (en) * 2009-12-10 2014-03-25 The Procter & Gamble Company Measurement method
NL2005282C2 (en) * 2010-08-27 2012-02-28 Christeyns N V Method and device for washing textile.
WO2012026821A1 (en) * 2010-08-27 2012-03-01 Christeyns N.V. Method and device for industrial washing of textile
US8321983B2 (en) 2010-10-05 2012-12-04 Whirlpool Corporation Method for controlling a cycle of operation in a laundry treating appliance
US10390675B2 (en) 2015-06-01 2019-08-27 Illinois Tool Works Inc. Warewash machine cleaning notification and in-situ dilution process
US10161075B2 (en) 2016-06-30 2018-12-25 Midea Group Co., Ltd. Laundry washing machine with automatic detection of detergent deficit
US10161074B2 (en) 2016-06-30 2018-12-25 Midea Group Co., Ltd. Laundry washing machine with automatic detergent dispensing and/or rinse operation type selection
US10273622B2 (en) 2016-06-30 2019-04-30 Midea Group Co., Ltd. Laundry washing machine with automatic selection of load type
US10358760B2 (en) 2016-06-30 2019-07-23 Midea Group Co., Ltd. Laundry washing machine with automatic rinse operation type selection
WO2019046567A3 (en) * 2017-08-30 2019-04-11 Daniels Ralph G Method and system for dispensing laundry chemistry based upon ozone concentration
US10676854B2 (en) 2017-08-30 2020-06-09 Awois, Llc Method and system for dispensing laundry chemistry based upon ozone concentration

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Owner name: MAYTAG CORPORATION, IOWA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DURFEE, ANTHONY L.;REEL/FRAME:012808/0966

Effective date: 20020416

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION