WO2018076082A1 - Pre-drain unbalance detection in a washing machine - Google Patents
Pre-drain unbalance detection in a washing machine Download PDFInfo
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- WO2018076082A1 WO2018076082A1 PCT/BR2016/050269 BR2016050269W WO2018076082A1 WO 2018076082 A1 WO2018076082 A1 WO 2018076082A1 BR 2016050269 W BR2016050269 W BR 2016050269W WO 2018076082 A1 WO2018076082 A1 WO 2018076082A1
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- WIPO (PCT)
- Prior art keywords
- unbalance
- tub
- spin
- sensor data
- washing machine
- Prior art date
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- 238000005406 washing Methods 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 36
- 230000000977 initiatory effect Effects 0.000 claims abstract description 14
- 206010001497 Agitation Diseases 0.000 claims description 33
- 238000013019 agitation Methods 0.000 claims description 33
- 238000009987 spinning Methods 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 14
- 238000012545 processing Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- 238000010412 laundry washing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- D06F33/48—Preventing or reducing imbalance or noise
-
- 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
- D06F2103/26—Imbalance; Noise 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
- D06F2105/08—Draining of washing liquids
-
- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
Definitions
- aspects of the present invention relate to sensing and correcting a dynamic unbalance in a laundry washing machine, e.g., a vertical-rotation-axis washing machine, prior to draining of the wash tub and initiation of a spin phase.
- a laundry washing machine e.g., a vertical-rotation-axis washing machine
- a washing machine washes laundry by applying mechanical forces to the laundry immersed in washing water.
- the washing machine performs a washing operation for agitating the laundry within the washing water and a rinsing operation for removing detergent and other substances from the laundry.
- the washing machine extracts water from the moisture-laden laundry following each of these operations by applying centrifugal forces to the laundry via spinning of a wash drum about an axis of rotation, also known as a spinning process or spinning phase.
- Unbalance of the wash assembly may be caused by a non-uniform distribution of a load of laundry inside the drum during the spinning process. Excessive unbalance poses various problems in the washing machine, such as collision of the wash assembly with the outer casing, severe vibration resulting in high noise levels, partial deformation of the laundry drum, and mechanical stress of the drum supporting members, i.e. bearings, dampers, and springs, inside the wash assembly. Accordingly, and particularly in vertical-rotation-axis washing machines, where a wash assembly is rotated by an electric drive unit about a substantially vertical axis or about an axis slightly tilted with respect to a vertical axis, steps should be taken to reduce vibration and walk of the machine during the spin cycle.
- unbalance is often monitored during a spin cycle when an unbalance condition is most readily detected.
- the wash tub must be refilled with water and subjected to a redistribution agitation stroke so that the laundry may be redistributed.
- sensing and correcting for an unbalance condition prior to draining of the wash tub, such that the laundry may be redistributed when water still remains in the wash tub would be beneficial.
- a primary objective of the present invention is to provide a system for monitoring and controlling dynamic unbalance in washing machines, particularly (but not necessarily) vertical- rotation-axis washing machines, prior to a spinning phase when water is still pooled in the wash tub.
- a method is provided of sensing unbalance in a washing machine due to unbalance of a wash assembly.
- the method includes filling a tub of the wash assembly with water, agitating contents of the tub, and initiating an unbalance detection spin prior to draining the water from the tub.
- Sensor data is obtained during the unbalance detection spin from a sensor mounted to a portion of the washing machine.
- An unbalance parameter e.g., based on a measured acceleration, vibration or displacement, is determined from the sensor data and, if a high dynamic unbalance condition is detected based on the unbalance parameter, the contents of the tub are redistributed.
- redistributing the contents of the tub includes stopping the unbalance detection spin and initiating a rebalance agitation of the contents of the tub.
- a washing machine includes an outer casing and a wash assembly housed inside the outer casing.
- the wash assembly includes a tub housing a drum rotatable about an axis of rotation.
- the washing machine further includes a drive system which selectively spins the drum about the axis.
- a control system is operably connected to the drive system and includes a sensor board assembly mounted to a portion of the washing machine.
- the sensor board assembly includes a sensor for measuring data for indicating a presence of an unbalance condition.
- the control system is configured to determine a dynamic unbalance parameter prior to draining water from a tub following a wash or rinse process.
- Fig. 1 shows a perspective view of a vertical-rotation-axis washing machine according to some aspects of the present invention.
- Fig. 2A is a perspective view of a sensor board assembly that may be used in the vertical-rotation-axis washing machine depicted in Fig. 1 .
- Fig 2B is a close-up perspective view of a portion of a tub of the wash assembly of the vertical-rotation-axis washing machine depicted in Fig. 1 , having fixing portions for mounting the sensor board assembly depicted in Fig. 2A thereto.
- Fig. 2C is another perspective view of the vertical-axis-rotation washing machine depicted in Fig. 1 including a close-up view of a portion of the tub having the sensor board assembly depicted in Fig. 2A mounted thereto.
- aspects of the present invention are directed to a laundry washing machine unbalance or out of balance (OOB) detection and control system employing a sensor, e.g., a tub-mounted accelerometer. More particularly, some aspects are directed to an OOB detection and control system for vertical- rotation-axis washing machines, i.e., top-load washing machines.
- OOB out of balance
- Fig. 1 shows one example of an automatic laundry washing machine 100 that may embody various aspects of the invention.
- Washing machine 100 includes a generally parallelepiped external cabinet or outer casing 102 and an opening 101 in a top wall of casing 102 that provides access to a suspended wash assembly 103 within the casing 102.
- the washing machine 100 also includes a control panel (not shown) for controlling the various operations of the washing machine 100, and a hinged lid (not shown) which covers the opening 101 during use of the washing machine 100 and which may be swung open to provide top-load access to portions of a wash assembly 103.
- Casing 102 houses the wash assembly 103, which is suspended within cabinet 102 by a number of shock-absorbing/dampening devices 106, so that a rotation axis R of the wash assembly 103 is substantially vertical (i.e., parallel to a vertical reference axis V shown in Fig. 1 ). It should be appreciated that in some embodiments the rotation axis R of the wash assembly 103 may be slightly titled with respect to the vertical reference axis V without departing from the scope of this disclosure.
- Wash assembly 103 includes a substantially cylindrical tub 108 housing a wash drum 107, which is rotatable inside tub 108 about the axis of rotation R.
- the wash assembly 103 further includes a central column 105 mounted on a bottom surface of the drum 107 for facilitating agitation of a load of laundry within the wash assembly 103.
- a wash process is initiated by an operator through interaction with the control panel.
- the process typically begins with a tub fill cycle, wherein water enters wash tub 108 via an inlet hose and through a valve and nozzle (not shown). Water fills the wash tub 108 to a predetermined level, which may depend on a user setting and/or upon the size of the wash load.
- the water supply valve is closed and the washing machine 100 enters a wash cycle comprising a number of sequential stages.
- the wash cycle may include an agitation process including intermittent rotation of the central column 105 in one or two directions, i.e., starting and stopping of the rotation of the central column 105, to impart an effective wash action and circulation of the wash load.
- wash liquid contained within the drum 107 and/or the wash tub 108 is drained via a central drain pipe (not shown).
- a spin cycle is initiated in which the wash drum 107 is rotated at a high rate of speed. This rotation of the drum 107 forces wash liquid absorbed by the laundry out of the load, and out of the drum 107 through apertures 1 16 formed in the side of the drum 107.
- agitation involves central column 105 rotating while wash tub 108 remains stationary or idle
- a spin cycle involves central column 105 and wash tub 108 moving together at a relatively high speed (e.g., higher than a speed associated with agitation) to extract water from the wash load.
- the wash load may further be subjected to a rinse cycle, in which the water supply valve is again opened to allow fresh water to enter the wash tub 108, followed by agitation, draining, and spinning of the drum 107 as discussed.
- a rinse cycle in which the water supply valve is again opened to allow fresh water to enter the wash tub 108, followed by agitation, draining, and spinning of the drum 107 as discussed.
- the foregoing process is usually repeated for one or more rinse cycles.
- the laundry within the wash assembly 103 may become unbalanced. Specifically, unbalance occurs when an uneven distribution of a load of laundry offsets the center of mass of wash assembly 103 with respect to the axis of rotation R of drum 107. As the center of mass moves farther away from the center of the wash assembly 103 (i.e., as the unbalance increases), an oscillatory component of the spinning drum 107 increases causing excessive vibration of the wash assembly 103. Because of the aforementioned problems associated with excessive vibration, it is thus beneficial to continually monitor the vibration and/or unbalance of the wash assembly 103 during the spinning phase, and to reduce the spinning speed and/or terminate rotation altogether if the vibration becomes excessive.
- wash assembly 103 may be monitored while water is contained therein to determine whether a spinning phase (e.g., during rinsing) can be safely performed.
- a spinning phase e.g., during rinsing
- the laundry in the wash assembly 103 may be agitated while water is still contained therein to eliminate or reduce the unbalance condition, without wasting water and time to re-load and drain water.
- an unbalance condition is detected during the spinning phase, at which point the water and/or wash liquid has been drained from the tub, redistribution of the load of laundry may be very difficult. Often the tub must be refilled with water in order for a redistribution agitation to effectively redistribute the load of laundry. Moreover, unbalance conditions tend to initially arise during the agitation phase; i.e., prior to draining the water from the tub and initiation of the spinning phase. This initial unbalance condition typically worsens in severity during the spinning phase. Thus detection and control of unbalance conditions may be more effective while water is pooled in the tub because redistribution of the laundry load is more easily accomplished, particularly for vertical-rotation- axis washing machines. Accordingly, aspects of the present invention sense unbalance conditions prior to draining the tub and initiating the spin phase such that, e.g., the water still within the tub 108 can be used to redistribute the unbalanced load.
- aspects of the invention detect vibration or OOB prior to the spinning phase (i.e., while water is still pooled in the tub) using a sensor mounted to a portion of the washing machine.
- a control system including a main controllerl 15 and a sensor board assembly 1 10 may be mounted to wash tub 108.
- the sensor board assembly 1 10 includes an accelerometer 1 1 1 configured to create an electrical signal corresponding to acceleration imparted on the accelerometer.
- the washing machine is described in connection with the sensor being mounted to the tub 108, it should be appreciated that in alternative embodiments the sensor may be mounted to another portion of the washing machine 100 that can be expected to experience detectable acceleration, displacement or vibration in relation to OOB conditions.
- the accelerometer may sense acceleration of the tub 108 in one direction (e.g., a substantially horizontal or vertical direction); while in other embodiments the accelerometer may sense acceleration along at least two sensing axes.
- the accelerometer may be a surface micromachined capacitive three-axis accelerometer, such as Freescale MMA8452Q 3-Axis Digital Accelerometer.
- the accelerometer 1 1 1 is mounted onto a circuit board 122 to provide electrical communication between the sensor board assembly 1 10 and the main controller 1 15.
- the accelerometer 1 1 1 and circuit board 122 are disposed within assembly housing 124 which is mounted on an outer portion of wash tub 108.
- one sensing axis may be substantially parallel to the axis of rotation R of drum 107 (i.e., vertical) and at least one sensing axis is orthogonal to the axis of rotation R of drum 107 (i.e., horizontal).
- the wash tub 108 may include a mounting frame 127 attached to an outer portion of the wash tub 108 between adjacent lateral ribs 120a, 120b on an outer surface of the wash tub 108.
- Mounting frame 127 has screw holes 128 for mounting the sensor board assembly 1 10 thereto with screws 126. Accordingly, the sensor board assembly 1 10 may be added to known washing machine tubs at minimal cost and with only minor modifications made to the hardware of the existing wash assembly.
- the control system may further include a processing unit (not shown) for receiving sensor data from the sensor board assembly 1 10 and determining a dynamic unbalance parameter.
- the accelerometer may be configured to sense acceleration along more than one sensing axis
- the processing unit may determine more than one dynamic unbalance parameter; e.g., an acceleration in one direction substantially parallel to the axis of rotation R of drum 107 (i.e., in the vertical direction) and an acceleration in at least one direction substantially orthogonal to the axis of rotation R of drum 107 (i.e., in the horizontal direction).
- a drive system 1 12 (e.g., motor) is operably connected to drum 107 to drive a rotation of the drum 107, e.g., for a spinning phase, and main controller 1 15 is configured to control the drive system 1 12, e.g, to adjust a spin speed.
- an unbalance parameter may be obtained from data provided by the sensor, e.g., based on a measured acceleration, displacement, or vibration. If the unbalance parameter exceeds a predetermined unbalance threshold, a critical unbalance condition of wash assembly 103 may be determined.
- the predetermined unbalance threshold may be determined by correlation with an oscillation value resulting when exceeding a critical unbalanced condition from experimental data and thereafter incorporated into control system for a given washing machine model. Further, separate unbalance thresholds may exist for various wash cycles, e.g., a pre- drain unbalance check, or unbalance monitoring during a spin phase.
- main controller 1 15 may perform a corrective routine to mitigate or prevent damage from the unbalance condition.
- main controller 1 15 may initiate a rebalance agitation if an unbalance condition is detected while water is still pooled in the tub 108, as described herein.
- Fig. 3 depicts a flow chart of a method for monitoring and controlling vibration due to a dynamic unbalance in the vertical-rotation-axis washing machine 100 prior to a spinning phase of a wash assembly 103, when water is still pooled in tub 108.
- the sequence of steps depicted for this method is for illustrative purposes only, and is not meant to limit the method as it is understood that the steps may proceed in a different logical order or additional or intervening steps may be included without detracting from the invention.
- the method starts with filling the tub with water 301 and then agitating contents of the tub 310 as part of a wash or rinse phase of a laundry cycle.
- An unbalance detection spin 320 is initiated upon completion of the agitation step 310, wherein the drum 107 rotates about the axis of rotation R at a preset spin speed for a preset spin duration.
- an amount of water may be drained from the tub 108 prior to the unbalance detection spin 320, depending on a number of factors, including but not limited to: a model of the washing machine, an amount of contents, e.g., laundry, in the tub 108, and/or a level of water in the tub 108.
- a sensor such as an accelerometer a displacement sensor, is mounted to a portion of the washing machine, e.g., the tub 108, to measure one or more parameters indicative of an unbalance condition.
- Control system obtains the sensor data at step 330.
- the preset spin speed of the unbalance detection spin at step 320 is generally much lower than a full spin phase spin speed.
- the preset spin speed of the unbalance detection spin may be on the order of 80-120 RPM, while a full spin phase maximum spin speed may be upwards of 1 ,500 RPM.
- the preset spin duration of the unbalance detection spin is generally of short duration, e.g., 10-30 seconds, in comparison to a full spin phase. For example, in some embodiments the preset spin duration of the unbalance detection spin is 20 seconds.
- the preset spin duration may also vary depending on a number of factors such as the washing machine model or type, the particular washing cycle (e.g., heavy soil or delicate), and a relative weight of contents in the tub.
- Sensor data may be obtained at a preset sample rate, which may also vary depending on a number of factors, such as the preset spin duration and/or the preset spin speed.
- control system will obtain sensor data at step 330 for only a certain spin speed range or for a certain duration of the unbalance detection spin.
- sensor data may be obtained at step 330 during a predetermined interval of the unbalance detection spin, such as the final 45 seconds.
- sensor data may be obtained at step 330 when a speed of the unbalance detection spin is within a certain range, such as 72 to 120 RPM.
- Sensor data is obtained from the sensor until the unbalance detection spin has been determined to be completed, i.e., the unbalance detection spin has run for the preset spin duration, at step 335, or upon obtaining a data value above a first threshold at 333.
- the sensor data is processed at step 340 by a processing unit of the control system in order to obtain a dynamic unbalance parameter, e.g., a maximum unbalance parameter.
- a dynamic unbalance parameter e.g., a maximum unbalance parameter.
- Unbalance detection at low speeds with water in the tub may be more difficult due to a lower level of the sensor signal at the low spin speeds. Accordingly, more advanced data processing of the sensor signal may be necessary to obtain an unbalance measure of sufficient precision.
- processing the raw sensor data may include converting the sensor signal from a time domain to a frequency domain, e.g., by a Fast Fourier Transform (FFT) or a Discrete Fourier Transform algorithm, and obtaining a sensor value peak in the region of the rotating frequency.
- FFT Fast Fourier Transform
- a filter such as a low pass filter, a bandpass filter, or the like, may also be applied when processing the raw sensor data, e.g., as an anti-aliasing filter for conditioning the sensor signal and/or for smoothing the sensor signal.
- Processing the sensor data at step 340 may also include aligning sensor data with a measured spin speed during the unbalance detection spin and cutting the sensor signal, i.e., excluding sensor data in regions corresponding spin speeds outside of a preferred spin speed range.
- the preferred spin speed range may be a range substantially close to the maximum speed of the unbalance detection spin, such as 72 to 120 RPM.
- Various operating quantities are determined from the processed sensor data in order to quantify dynamic unbalance conditions, such as a maximum unbalance parameter.
- the maximum unbalance parameter may be based on a measured acceleration, displacement or vibration, depending on the type of sensor employed.
- a maximum unbalance parameter corresponds to an unbalance magnitude, e.g., is based only on a component of sensor data of one direction, e.g., horizontal or vertical, and a predetermined threshold value is obtained from a lookup table based on the directional component of the sensor data.
- the lookup table may provide predetermine threshold values which vary based on one or more factors, such as the direction in which the sensor is measuring sensor data and/or operating variable of the wash cycle.
- a predetermined threshold value i.e., a second threshold
- redistributing the contents of the tub includes stopping the unbalance detection spin at step 360 and initiating a rebalance agitation of the contents of the tub at step 370 (if a maximum amount of retribution agitations have not already been attempted as will be more fully discussed below in connection with steps 365 and 380) using the water still pooled within the wash tub 108.
- intermittent and rapid rotation of the drum 107 occurs in one or two directions, i.e., starting and stopping of the rotation of the drum 107, to impart a circulation and redistribution of the wash load.
- a subsequent unbalance detection spin is initiated and the method restarts at step 320 and a recheck for the presence of an unbalance condition (e.g., whether a subsequently obtained maximum unbalance parameter exceeds a predetermined second threshold value or whether subsequently obtained sensor data exceeds a predetermined first threshold value) is performed. If a subsequently obtained maximum unbalance parameter is determined to still exceed the predetermined threshold value at step 355, a rebalance agitation of the contents of the tub 370 may be repeated. Some loads however may not be able to be rebalanced by the agitation routine.
- an unbalance condition e.g., whether a subsequently obtained maximum unbalance parameter exceeds a predetermined second threshold value or whether subsequently obtained sensor data exceeds a predetermined first threshold value
- rebalancing the contents of the tub may also include first determining if a maximum number of rebalance agitations have been performed at step 365. If it is determined that the maximum number of rebalance agitations has been performed, an alert to a user is executed at step 380 in order to notify a user to manually redistribute the contents of the wash tub 108 in order to complete the wash cycle.
- the wash cycle will stop until a user entry is received associated with restarting the wash cycle (e.g., if the user has manually redistributed the contents of the wash tub 108). In some embodiments, the wash cycle may continue with the unbalance condition still present.
- the wash cycle may continue at step 399 with a spin cycle even if the maximum number of rebalance agitations has been performed and, if the drum hits the cabinet during the spin, the spin will stop immediately. If a maximum unbalance parameter does not exceed a predetermined threshold value at step 355, the water pooled in the tub 108 is drained at step 390. Subsequently, the wash cycle continues at step 399. In other words, if the unbalance detection was conducted as part of a wash cycle, the wash cycle may continue with a rinse cycle or with a subsequent wash cycle, as appropriate. Similarly, if the unbalance detection was conducted as part of a rinse cycle, the wash cycle may continue with a spin cycle or with a subsequent rinse cycle, as appropriate.
- Fig. 4 depicts an exemplary representation of a sensor signal 410 during a washing process in accordance with one or more aspects of the present disclosure. Also depicted is a control flag signal 420 indicating that a spin speed or agitation speed has reached a target. As shown in FIG. 4, after an agitation phase 430, and while there is still water in the tub, an unbalance condition is detected at 440, e.g., based on a sensed acceleration above a threshold, before reaching a target spin speed shown by control flag 420. Detection of an unbalance condition 440 may be indicative of a washing group (e.g., tub) hitting the cabinet.
- a washing group e.g., tub
- the first threshold may be exceeded upon detection of an unbalance condition 440, e.g., by comparing raw sensor data to a preset threshold. Accordingly, the spinning may be stopped before reaching the target spin speed. In other words, for the detection of an unbalance condition 440, processing the sensor signal may not be necessary to detect unbalance, e.g., an acceleration signal that exceeds the first threshold, since the sensor signal is strong enough for the system to detect the issue.
- one or more rebalance agitations at 450 may be attempted in order to reduce or eliminate the unbalance condition. For example, after a first rebalance agitation is performed and subsequent unbalance detection detects that there is no longer an unbalance condition, no further unbalance detection spins may be needed. However, where the sensor signal is relatively low, further signal processing, e.g., a Fast Fourier Transform, may be performed to determine if the unbalance is low enough to safely start a spinning phase. When the processed signal is above the second threshold, subsequent rebalance agitations may be performed, otherwise, the water is drained and a spinning phase is performed at 460.
- further signal processing e.g., a Fast Fourier Transform
- Systems and methods according to aspects of the present invention have the advantage of detecting the presence of a dynamic component of unbalance of the wash assembly prior to a spinning phase when water is still pooled in the wash tub, and so greatly reduces the risk of the washing assembly colliding with the casing during subsequent spinning phases.
- the benefits include noise and vibration reduction, operating more often at a maximum spin speed and a safer product. Additionally detecting and controlling an unbalance condition prior to a spinning phase when water is still pooled in the wash tub has the added benefit of time savings and water savings.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112019008226-3A BR112019008226B1 (en) | 2016-10-25 | 2016-10-25 | METHOD OF DETECTING UNBALANCE IN A WASHING MACHINE, METHOD OF DETECTING UNBALANCE IN A WASHING ASSEMBLY OF A WASHING MACHINE AND WASHING MACHINE |
AU2016427897A AU2016427897A1 (en) | 2016-10-25 | 2016-10-25 | Pre-drain unbalance detection in a washing machine |
CN201680090370.6A CN109863266A (en) | 2016-10-25 | 2016-10-25 | Uneven detection before draining in washing machine |
PCT/BR2016/050269 WO2018076082A1 (en) | 2016-10-25 | 2016-10-25 | Pre-drain unbalance detection in a washing machine |
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PCT/BR2016/050269 WO2018076082A1 (en) | 2016-10-25 | 2016-10-25 | Pre-drain unbalance detection in a washing machine |
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WO2018076082A1 true WO2018076082A1 (en) | 2018-05-03 |
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PCT/BR2016/050269 WO2018076082A1 (en) | 2016-10-25 | 2016-10-25 | Pre-drain unbalance detection in a washing machine |
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CN (1) | CN109863266A (en) |
AU (1) | AU2016427897A1 (en) |
BR (1) | BR112019008226B1 (en) |
WO (1) | WO2018076082A1 (en) |
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CN111485370A (en) * | 2019-01-24 | 2020-08-04 | 青岛海尔洗衣机有限公司 | Balance correction method for washing equipment |
US20200308750A1 (en) * | 2017-10-13 | 2020-10-01 | Samsung Electronics Co., Ltd. | Washing machine and method for controlling same |
US11085139B2 (en) | 2019-10-15 | 2021-08-10 | Haier Us Appliance Solutions, Inc. | System and method for detecting a low flow condition during the filling of a washing machine appliance |
US11242633B2 (en) | 2019-10-03 | 2022-02-08 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods of operation |
EP4067551A1 (en) * | 2021-03-30 | 2022-10-05 | Diehl AKO Stiftung & Co. KG | Motion monitoring device for monitoring the movement of a drum of a washing machine |
US11851799B2 (en) | 2021-03-25 | 2023-12-26 | Haier Us Appliance Solutions, Inc. | Systems and methods of operating a washing machine appliance to detect and mitigate out-of-balance conditions |
US12043939B2 (en) | 2020-10-13 | 2024-07-23 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods of operation |
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US11519118B2 (en) * | 2019-06-18 | 2022-12-06 | Vestel Elektronik Sanayi Ve Ticaret A.S. | Washing machine and method of operation |
CN110592885A (en) * | 2019-08-19 | 2019-12-20 | 珠海格力电器股份有限公司 | Eccentricity detection device and method for drum washing machine and washing machine |
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- 2016-10-25 AU AU2016427897A patent/AU2016427897A1/en not_active Abandoned
- 2016-10-25 WO PCT/BR2016/050269 patent/WO2018076082A1/en active Application Filing
- 2016-10-25 CN CN201680090370.6A patent/CN109863266A/en active Pending
- 2016-10-25 BR BR112019008226-3A patent/BR112019008226B1/en active IP Right Grant
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US11242633B2 (en) | 2019-10-03 | 2022-02-08 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods of operation |
US11085139B2 (en) | 2019-10-15 | 2021-08-10 | Haier Us Appliance Solutions, Inc. | System and method for detecting a low flow condition during the filling of a washing machine appliance |
US12043939B2 (en) | 2020-10-13 | 2024-07-23 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods of operation |
US11851799B2 (en) | 2021-03-25 | 2023-12-26 | Haier Us Appliance Solutions, Inc. | Systems and methods of operating a washing machine appliance to detect and mitigate out-of-balance conditions |
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Also Published As
Publication number | Publication date |
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AU2016427897A1 (en) | 2019-05-02 |
CN109863266A (en) | 2019-06-07 |
BR112019008226A2 (en) | 2019-07-09 |
BR112019008226B1 (en) | 2022-11-01 |
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