US20050166334A1 - Washing machine with water control and associated method - Google Patents
Washing machine with water control and associated method Download PDFInfo
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- US20050166334A1 US20050166334A1 US10/770,594 US77059404A US2005166334A1 US 20050166334 A1 US20050166334 A1 US 20050166334A1 US 77059404 A US77059404 A US 77059404A US 2005166334 A1 US2005166334 A1 US 2005166334A1
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- water
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- fill rate
- washing machine
- rate
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 238000005406 washing Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/02—Water supply
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/087—Water level measuring or regulating devices
Definitions
- the present invention relates to a washing machine having a water level control and associated method.
- water conservation devices including water level controls. These devices may require user input in the form of selection of a cycle type, or cycle duration or estimate of water level required based on the load.
- Conventional top-load washing machines include a pressure switch that is either fixed or variable to determine the water level when filling the washing machine.
- a pressure switch that is either fixed or variable to determine the water level when filling the washing machine.
- the user controls and may vary the fill water level by selecting a setting on an associated dial every time the washing machine is used. Often, however, the user guesses incorrectly the appropriate fill level or fails to reset or adjust the water level for each clothes load. This leads to over-consumption of water and inefficient energy use for heating the water.
- the invention provides a method for controlling a water fill level of a washing machine.
- the method comprises loading the washing machine with a wash load, initiating a water fill stage, counting the water fill time, and measuring the water level.
- a measured fill rate is determined from the measured water level and water fill time, and compared to a signature fill rate, which is characteristic of the washing machine when unloaded. When the measured fill rate is equal to the signature fill rate, the water fill stage is terminated.
- a washing machine that comprises a tub for receiving a load of clothes, a water level sensor taking water level measurements during a water fill stage, and a controller.
- the controller controls a water valve that introduces water into the washing machine.
- the controller comprises a timer, a memory and a microprocessor.
- the microprocessor accesses a signature fill rate of the washing machine when unloaded, receives water level measurements from the sensor during the fill stage, and determines a measured fill rate.
- the microprocessor compares the measured fill rate to the signature fill rate and shut off the water valve when the measured fill rate is substantially equal to the signature fill rate.
- Another embodiment of the invention provides a method for controlling a water fill level of a washing machine.
- the method comprises measuring a fill rate of the washing machine during a water fill stage when the machine contains a wash load in an inner tub.
- the measured fill rate is compared to a predetermined signature fill rate of the washing machine when unloaded, and the water fill stage is terminated when the measured fill rate is equal to the signature fill rate.
- Yet another embodiment provides a method for controlling a water fill level of a washing machine.
- the method comprises turning on a water valve to start a water fill stage, monitoring a water fill rate during the water fill stage, measuring fluctuations in the water fill rate, determining a steady state fill rate, and turning off the water valve.
- FIG. 1 is a partially cut-away perspective view of a washing machine according to the present invention
- FIG. 2 is a partial sectional view of the washing machine of FIG. 1 ;
- FIG. 3 is a flow chart of the controller logic according to the present invention.
- FIG. 4 is a schematic control diagram according to the present invention.
- FIG. 5 is a representative graph of water level versus fill time.
- FIGS. 1 and 2 illustrate an embodiment of the washing machine 100 according to the invention.
- the washing machine includes a housing 110 , an inner tub 102 , and an outer tub 104 .
- the inner 102 tub includes perforations 107 through which water enters the inner tub 102 from the outer tub 104 .
- the inner tub includes an agitator 106 connected to a motor and transmission system 108 .
- a wash load 112 is introduced into the inner tub 102 for washing.
- the washing machine includes a control console 116 with a user-operable control panel 114 .
- the control console 116 houses a controller 118 , which includes a microprocessor 120 , storage memory 140 , and a timer 142 .
- the controller 118 receives a user input 122 through the control panel 114 .
- the user input 122 includes wash cycle selection and wash cycle modifiers, such as wash and/or rinse temperature and clothes type.
- the controller 118 controls the water valves 124 to turn water flow on and off and to adjust the hot and cold water flow for a user-selected temperature setting.
- the controller 118 communicates with a water level sensor 126 .
- the water level sensor 126 may be a continuously variable water level sensor 130 , such as a commercially available LL series sensor from Honeywell Sensing and Control, Milpitas, Calif., or any other type of water level sensor, including a commercial radio frequency sensor, a proximity sensor, and the accurate radio frequency sensor disclosed in copending U.S. patent application Ser. No. ______, entitled “Liquid Level Sensor for Appliance and Associated Method”, which is incorporated herein by reference in its entirety.
- the radio frequency sensor 128 is mounted on the outer tub 104 .
- the water level sensor 126 , 128 is programmed to periodically, for example at preset time intervals, or continuously check the water level, and send an analog or digital signal that indicates the water level to the microprocessor 120 of the controller 118 .
- any complete wash cycle includes a water fill stage.
- the user's input is conveyed from the control panel 114 to the controller 118 , which controls the progression of the washing cycle.
- the controller 118 opens the water valves 124 and starts counting fill time as water enters the outer tub 104 .
- the first few seconds of the fill time up to “t 1 ” correspond to filling the lower portion 132 of the outer tub 104 up to a water level “H 1 ”, as shown in a representative graph of water level versus fill time in FIG. 5 .
- the initial fill time up to t 1 depends on each machine's geometry and the water pressure, and can be typically about 20-30 seconds.
- the initial portion of the graph up to time t 1 is substantially linear, and, therefore, the slope of the graph, which represents the fill rate and is equal to tan ⁇ 1 , is substantially constant.
- the controller 118 may calibrate the washing machine 100 to either determine and store in memory 140 the initial fill rate tan ⁇ 1 , or modify a fill rate tan ⁇ 2 , which is factory-set. As water starts entering the inner tub 102 , water eventually reaches the wash load 112 .
- the wash load 112 gradually absorbs water and possibly reorients itself under the weight of the absorbed water, thus affecting the fill rate and generally interacting with the water level to cause nonlinear fluctuations in the fill rate.
- the water level versus fill time graph is, therefore, non-linear during this part of the water fill stage, until the wash load 112 is fully submerged in water, at time t 2 corresponding to water level H 2 .
- time t 2 that is, after full submersion of the wash load 112
- the water level versus fill time graph becomes linear again, with slope defined by tan ⁇ 2 , where ⁇ 2 , and ⁇ 2 are typically equal or have a known relation, which can be used for calibration purposes.
- the actual values of the slope tan ⁇ 1 and tan ⁇ 2 are characteristics of the geometry and dimensions of the inner tub 102 , the outer tub 104 and other features of the washing machine 100 , and provide a signature for the washing machine 100 .
- Each washing machine's signature can be determined by the manufacturer and stored in the microprocessor 120 at the factory.
- the signature fill rate can also be modified during calibration as described above.
- the controller 118 periodically actuates the agitator 106 during the fill time between t 1 and t 2 .
- the agitator 106 causes the wash load 112 to be more evenly distributed and uniformly wetted inside the inner tub 102 . Thus, sudden discontinuities or spikes in the water level and fill rate are minimized or avoided, increasing the reliability of the water level measurements.
- the microprocessor 120 receives the water level data from the water level sensor 126 and determines a measured fill rate, which is represented by tan ⁇ at time t 3 , where t 3 is a representative measurement time between t 1 and t 2 in the graph of FIG. 5 .
- tan ⁇ is a representative measurement time between t 1 and t 2 in the graph of FIG. 5 .
- a flow chart of the water level control is depicted in FIG. 3 .
- the process starts at 150 with user input, the wash cycle progresses to the water fill stage at 152 , and the controller 118 turns on the water valves 124 and begins counting time at 154 .
- the sensor 126 measures the water fill level and communicates with the controller 118 at 164 .
- the controller 118 determines the fill rate at 156 .
- the measured fill rate is compared with the signature fill rate tan ⁇ 2 at 158 . If those two values are not equal, the process continues. If those values are equal, the controller 118 turns off the water valves 124 at 160 and the wash cycle continues.
- the controller may perform a calibration at 157 to determine or modify the signature fill rate tan ⁇ 2 , by determining tan ⁇ 1 and using the known relation between ⁇ 1 and ⁇ 2 .
- the water level versus time graph of FIG. 5 is merely illustrative.
- the shape and the characteristics of the graph depend on a variety of factors, which may include, in addition to the dimensions and shape of the inner and outer tubs 102 , 104 , water temperature and water pressure.
- the water fill rate generally includes an initial stage for the time interval from 0 to t 1 a transient stage between t 1 and t 2 , and a steady state beyond t 2 .
- the controller 118 monitors the fill rate until a steady state is reached at t 2 , and at that time, it shuts the water valves 124 .
- the onset of the steady state condition can be determined by comparing the measured fill rate to a signature fill rate as discussed above, or by determining that the fill rate ceases to fluctuate and remains substantially constant.
Abstract
An automatic washing machine with water level control and associated method. In one embodiment, the washing machine comprises a tub for receiving a load of clothes, a water level sensor taking water level measurements during a water fill stage, and a controller. The controller controls a water valve that introduces water into the washing machine. The controller comprises a timer, a memory and a microprocessor. The microprocessor accesses a signature fill rate of the washing machine when unloaded, receives water level measurements from the sensor during the fill stage, and determines a measured fill rate. The microprocessor compares the measured fill rate to the signature fill rate and shut off the water valve when the measured fill rate is substantially equal to the signature fill rate.
Description
- The present invention relates to a washing machine having a water level control and associated method.
- Many household appliances, such as, for example, clothes washers and dishwashing machines are equipped with water conservation devices, including water level controls. These devices may require user input in the form of selection of a cycle type, or cycle duration or estimate of water level required based on the load.
- Conventional top-load washing machines, for example, include a pressure switch that is either fixed or variable to determine the water level when filling the washing machine. In a variable pressure switch, the user controls and may vary the fill water level by selecting a setting on an associated dial every time the washing machine is used. Often, however, the user guesses incorrectly the appropriate fill level or fails to reset or adjust the water level for each clothes load. This leads to over-consumption of water and inefficient energy use for heating the water.
- Federal regulations provide manufacturer incentives, for example in the form of energy credits, to develop more water and energy efficient machines, reducing hot water consumption. Recognizing that reliance on the user to correctly determine and remember to reset the water level switch is not an effective method to conserve energy, regulatory agencies do not give credits toward energy use limits to manufacturers of washing machines that have user-controlled water level features.
- Therefore, water-conserving washing machines that do not rely on the user to determine the water fill level are desirable.
- In one embodiment, the invention provides a method for controlling a water fill level of a washing machine. The method comprises loading the washing machine with a wash load, initiating a water fill stage, counting the water fill time, and measuring the water level. A measured fill rate is determined from the measured water level and water fill time, and compared to a signature fill rate, which is characteristic of the washing machine when unloaded. When the measured fill rate is equal to the signature fill rate, the water fill stage is terminated.
- Another embodiment of the invention provides a washing machine that comprises a tub for receiving a load of clothes, a water level sensor taking water level measurements during a water fill stage, and a controller. The controller controls a water valve that introduces water into the washing machine. The controller comprises a timer, a memory and a microprocessor. The microprocessor accesses a signature fill rate of the washing machine when unloaded, receives water level measurements from the sensor during the fill stage, and determines a measured fill rate. The microprocessor compares the measured fill rate to the signature fill rate and shut off the water valve when the measured fill rate is substantially equal to the signature fill rate.
- Another embodiment of the invention provides a method for controlling a water fill level of a washing machine. The method comprises measuring a fill rate of the washing machine during a water fill stage when the machine contains a wash load in an inner tub. The measured fill rate is compared to a predetermined signature fill rate of the washing machine when unloaded, and the water fill stage is terminated when the measured fill rate is equal to the signature fill rate.
- Yet another embodiment provides a method for controlling a water fill level of a washing machine. The method comprises turning on a water valve to start a water fill stage, monitoring a water fill rate during the water fill stage, measuring fluctuations in the water fill rate, determining a steady state fill rate, and turning off the water valve.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The invention can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, in the figures, like reference numerals designate corresponding parts throughout the different views.
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FIG. 1 is a partially cut-away perspective view of a washing machine according to the present invention; -
FIG. 2 is a partial sectional view of the washing machine ofFIG. 1 ; -
FIG. 3 is a flow chart of the controller logic according to the present invention; -
FIG. 4 is a schematic control diagram according to the present invention; and -
FIG. 5 is a representative graph of water level versus fill time. - The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
-
FIGS. 1 and 2 illustrate an embodiment of thewashing machine 100 according to the invention. The washing machine includes ahousing 110, aninner tub 102, and anouter tub 104. The inner 102 tub includesperforations 107 through which water enters theinner tub 102 from theouter tub 104. The inner tub includes anagitator 106 connected to a motor andtransmission system 108. Awash load 112 is introduced into theinner tub 102 for washing. - Referring to
FIGS. 1 and 4 , the washing machine includes acontrol console 116 with a user-operable control panel 114. Thecontrol console 116 houses acontroller 118, which includes amicroprocessor 120,storage memory 140, and atimer 142. Thecontroller 118 receives auser input 122 through thecontrol panel 114. Theuser input 122 includes wash cycle selection and wash cycle modifiers, such as wash and/or rinse temperature and clothes type. Thecontroller 118 controls thewater valves 124 to turn water flow on and off and to adjust the hot and cold water flow for a user-selected temperature setting. - The
controller 118 communicates with awater level sensor 126. Thewater level sensor 126 may be a continuously variablewater level sensor 130, such as a commercially available LL series sensor from Honeywell Sensing and Control, Milpitas, Calif., or any other type of water level sensor, including a commercial radio frequency sensor, a proximity sensor, and the accurate radio frequency sensor disclosed in copending U.S. patent application Ser. No. ______, entitled “Liquid Level Sensor for Appliance and Associated Method”, which is incorporated herein by reference in its entirety. Theradio frequency sensor 128 is mounted on theouter tub 104. Thewater level sensor microprocessor 120 of thecontroller 118. - In operation, the user loads the
washing machine 100 with thewash load 112 and initiates a washing cycle using thecontrol panel 114. It is understood that any complete wash cycle includes a water fill stage. The user's input is conveyed from thecontrol panel 114 to thecontroller 118, which controls the progression of the washing cycle. At the water fill stage, thecontroller 118 opens thewater valves 124 and starts counting fill time as water enters theouter tub 104. The first few seconds of the fill time up to “t1” correspond to filling thelower portion 132 of theouter tub 104 up to a water level “H1”, as shown in a representative graph of water level versus fill time inFIG. 5 . The initial fill time up to t1 depends on each machine's geometry and the water pressure, and can be typically about 20-30 seconds. The initial portion of the graph up to time t1 is substantially linear, and, therefore, the slope of the graph, which represents the fill rate and is equal to tan α1, is substantially constant. During this part of the fill stage, thecontroller 118 may calibrate thewashing machine 100 to either determine and store inmemory 140 the initial fill rate tan α1, or modify a fill rate tan α2, which is factory-set. As water starts entering theinner tub 102, water eventually reaches thewash load 112. Thewash load 112 gradually absorbs water and possibly reorients itself under the weight of the absorbed water, thus affecting the fill rate and generally interacting with the water level to cause nonlinear fluctuations in the fill rate. The water level versus fill time graph is, therefore, non-linear during this part of the water fill stage, until thewash load 112 is fully submerged in water, at time t2 corresponding to water level H2. After time t2, that is, after full submersion of thewash load 112, the water level versus fill time graph becomes linear again, with slope defined by tan α2, where α2, and α2 are typically equal or have a known relation, which can be used for calibration purposes. The actual values of the slope tan α1 and tan α2, are characteristics of the geometry and dimensions of theinner tub 102, theouter tub 104 and other features of thewashing machine 100, and provide a signature for thewashing machine 100. Each washing machine's signature can be determined by the manufacturer and stored in themicroprocessor 120 at the factory. The signature fill rate can also be modified during calibration as described above. - To promote full submersion of the
wash load 112 during the water fill stage, thecontroller 118 periodically actuates theagitator 106 during the fill time between t1 and t2. Theagitator 106 causes thewash load 112 to be more evenly distributed and uniformly wetted inside theinner tub 102. Thus, sudden discontinuities or spikes in the water level and fill rate are minimized or avoided, increasing the reliability of the water level measurements. - The
microprocessor 120 receives the water level data from thewater level sensor 126 and determines a measured fill rate, which is represented by tan β at time t3, where t3 is a representative measurement time between t1 and t2 in the graph ofFIG. 5 . When the measured fill rate at time t2 becomes substantially equal to the signature fill rate tan α2 which is factory preset or modified during calibration from tan α1, thewash load 112 is fully submerged and thecontroller 118 shuts off thewater valves 124 and terminates the water fill stage. - A flow chart of the water level control is depicted in
FIG. 3 . The process starts at 150 with user input, the wash cycle progresses to the water fill stage at 152, and thecontroller 118 turns on thewater valves 124 and begins counting time at 154. Thesensor 126 measures the water fill level and communicates with thecontroller 118 at 164. Thecontroller 118 determines the fill rate at 156. The measured fill rate is compared with the signature fill rate tan α2 at 158. If those two values are not equal, the process continues. If those values are equal, thecontroller 118 turns off thewater valves 124 at 160 and the wash cycle continues. In one embodiment, the controller may perform a calibration at 157 to determine or modify the signature fill rate tan α2, by determining tan α1 and using the known relation between α1 and α2. - It will be appreciated that the water level versus time graph of
FIG. 5 is merely illustrative. The shape and the characteristics of the graph depend on a variety of factors, which may include, in addition to the dimensions and shape of the inner andouter tubs controller 118 monitors the fill rate until a steady state is reached at t2, and at that time, it shuts thewater valves 124. The onset of the steady state condition can be determined by comparing the measured fill rate to a signature fill rate as discussed above, or by determining that the fill rate ceases to fluctuate and remains substantially constant. - While various embodiments of the invention have been described, it will be apparent to those of ordinary skill in the art that other embodiments and implementations are possible that are within the scope of this invention. Accordingly, the invention is not restricted except in light of the attached claims and their equivalents.
Claims (20)
1. A method for controlling a water fill level of a washing machine, the method comprising:
loading the washing machine with a wash load;
initiating a water fill stage;
counting the water fill time;
measuring the water level;
determining a measured fill rate from the measured water level and water fill time;
comparing the measured fill rate to a signature fill rate characteristic of the washing machine when unloaded; and
terminating the water fill stage when the measured fill rate is equal to the signature fill rate.
2. The method of claim 1 , wherein measuring the water level includes obtaining water level measurements using a water level sensor.
3. The method of claim 1 , further comprising agitating the wash load.
4. The method of claim 1 , further comprising presetting the signature fill rate.
5. The method of claim 1 , further comprising modifying the signature fill rate by determining a fill rate during an initial portion of the water fill stage.
6. The method of claim 5 , wherein determining the fill rate during the initial portion of the water fill stage comprises:
counting the water fill time during the initial portion of the water fill stage; and
measuring the water level during the initial portion of the water fill stage.
7. The method of claim 1 , further comprising calibrating the washing machine by modifying and storing the signature fill rate.
8. The method of claim 4 , further comprising calibrating the washing machine by modifying and storing the signature fill rate.
9. An automatic washing machine comprising:
a tub for receiving a load of clothes;
a water level sensor operable to take water level measurements during a water fill stage; and
a controller controlling a water valve that introduces water into the washing machine, the controller comprising a timer, a memory and a microprocessor, wherein the microprocessor accesses a signature fill rate of the washing machine when unloaded, receives the water level measurements from the sensor during the water fill stage, the microprocessor being programmed to determine a measured fill rate, compare the measured fill rate to the signature fill rate and shut off the water valve when the measured fill rate is substantially equal to the signature fill rate.
10. The washing machine of claim 9 , wherein the water level sensor is a continuously variable pressure sensor.
11. The washing machine of claim 9 , wherein the water level sensor is a proximity sensor.
12. The washing machine of claim 9 , wherein the water level sensor is a radio frequency sensor.
13. A method for controlling a water fill level of a washing machine, the method comprising:
measuring a fill rate of the washing machine during a water fill stage, the machine containing a wash load in an inner tub;
comparing the measured fill rate to a signature fill rate of the washing machine when unloaded; and
terminating the water fill stage when the measured fill rate is equal to the signature fill rate.
14. The method of claim 13 , further comprising agitating the wash load.
15. The method of claim 13 , further comprising:
calibrating the washing machine before water reaches the wash load in the inner tub; and
modifying the signature fill rate by determining a fill rate during an initial portion of the water fill stage.
16. The method of claim 15 , wherein determining the fill rate during the initial portion of the water fill stage comprises:
counting the water fill time during the initial portion of the water fill stage; and
measuring the water level during the initial portion of the water fill stage.
17. The method of claim 15 , further comprising presetting the signature fill rate in the machine.
18. A method for controlling a water fill level of a washing machine having a wash load, the method comprising:
turning on a water valve to start a water fill stage;
monitoring a water fill rate during the water fill stage;
measuring fluctuations in the water fill rate;
determining a steady state fill rate; and
turning off the water valve.
19. The method of claim 18 , wherein determining a steady state fill rate comprises measuring substantial ceasing of fill rate fluctuations.
20. The method of claim 18 , wherein determining a steady state fill rate further comprises:
comparing the monitored water fill rate to a predetermined fill rate; and
determining that the monitored water fill rate is substantially equal to the predetermined fill rate.
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US10/770,594 US20050166334A1 (en) | 2004-02-03 | 2004-02-03 | Washing machine with water control and associated method |
CNA2005100016551A CN1651635A (en) | 2004-02-03 | 2005-02-03 | Washing machine with water control and associated method |
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US10/770,594 US20050166334A1 (en) | 2004-02-03 | 2004-02-03 | Washing machine with water control and associated method |
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Legal Events
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AS | Assignment |
Owner name: EMERSON ELECTRIC COMPANY, MISSOURI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CLOUSER, MICAHEL T.;REEL/FRAME:014957/0588 Effective date: 20040122 |
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AS | Assignment |
Owner name: EMERSON ELECTRIC CO., MISSOURI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CLOUSER, MICHAEL T.;REEL/FRAME:015191/0098 Effective date: 20040122 |
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STCB | Information on status: application discontinuation |
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