CN111850961A - Washing machine and foam detection method and device thereof - Google Patents
Washing machine and foam detection method and device thereof Download PDFInfo
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- CN111850961A CN111850961A CN201910312017.3A CN201910312017A CN111850961A CN 111850961 A CN111850961 A CN 111850961A CN 201910312017 A CN201910312017 A CN 201910312017A CN 111850961 A CN111850961 A CN 111850961A
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- 238000005406 washing Methods 0.000 title claims abstract description 92
- 239000006260 foam Substances 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 claims abstract description 170
- 230000008859 change Effects 0.000 claims abstract description 83
- 238000000034 method Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010009 beating Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000003599 detergent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- QBPPRVHXOZRESW-UHFFFAOYSA-N 1,4,7,10-tetraazacyclododecane Chemical compound C1CNCCNCCNCCN1 QBPPRVHXOZRESW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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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
- D06F21/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement
-
- 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
- D06F39/06—Arrangements for preventing or destroying scum
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
A washing machine and a foam detection method and device thereof are provided, wherein the foam detection method of the washing machine comprises the following steps: acquiring a vertical displacement average value of an outer cylinder of the washing machine in each rotation speed cycle; calculating an absolute value of a vertical displacement change rate of a vertical displacement mean value of the outer cylinder relative to a vertical displacement reference value of the outer cylinder in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam; and when the absolute value of the change rate of the vertical displacement is larger than a set change rate threshold value, determining that the high-bubble phenomenon occurs. By adopting the scheme, the foam detection precision can be improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of washing machines, in particular to a washing machine and a foam detection method and device thereof.
Background
Due to the characteristic of easy foaming of the laundry detergent in the market and the use habit of users, a large amount of foam, referred to as a high-foam phenomenon, is often generated in the washing process. When the high foaming phenomenon occurs, a large amount of foam may remain in the laundry and the tub.
Currently, foam detection is usually performed in the drainage and dehydration stages according to the change of pressure value in the cylinder, but has a certain hysteresis. If the amount of foam is too large in the main wash stage, flooding or foaming tends to occur.
Disclosure of Invention
The invention aims to provide a high-bubble phenomenon detection method with high accuracy.
In order to solve the above technical problem, an embodiment of the present invention provides a method for detecting bubbles in a washing machine, including: acquiring a vertical displacement average value of an outer cylinder of the washing machine in each rotation speed cycle; calculating an absolute value of a vertical displacement change rate of a vertical displacement mean value of the outer cylinder relative to a vertical displacement reference value of the outer cylinder in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam; and when the absolute value of the change rate of the vertical displacement is larger than a set change rate threshold value, determining that the high-bubble phenomenon occurs.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
and determining the absolute value of the vertical displacement change rate of the outer barrel in each rotation speed cycle according to the vertical displacement reference value of the vertical displacement average value of the outer barrel of the washing machine relative to the outer barrel in each rotation speed cycle. And when the absolute value of the vertical displacement change rate of the outer barrel in a certain rotation speed cycle is larger than a set change rate threshold value, determining that the high-bubble phenomenon occurs. The high-foam phenomenon can be monitored in real time in the washing stage, and the displacement reference value of the outer cylinder is the mean value of the vertical displacements of m rotating speed cycles before the foam appears, so that the influence of factors such as the type and weight of clothes on the foam detection can be avoided, and the detection accuracy of the high-foam phenomenon can be improved.
Optionally, after determining that the high bubble phenomenon occurs, the method further includes: recording the time when the high-bubble phenomenon occurs, and monitoring the duration of the high-bubble phenomenon; and when the duration of the high bubble phenomenon reaches a preset duration, executing defoaming operation.
Optionally, the washing machine comprises a rotating inner drum and an outer drum positioned outside the inner drum, and during the washing process, the inner drum alternately rotates clockwise and counterclockwise; the calculating the absolute value of the vertical displacement change rate of the vertical displacement mean value of the outer cylinder relative to the vertical displacement reference value of the outer cylinder in each rotation speed cycle comprises at least one of the following steps: calculating an absolute value of a vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise according to a vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and a vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise; and calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates anticlockwise according to the vertical displacement average value of the outer cylinder in each rotating speed cycle when the inner cylinder rotates anticlockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates anticlockwise.
Optionally, the determining that a bubble phenomenon occurs when the absolute value of the vertical displacement change rate is greater than a set change rate threshold includes: when the inner cylinder rotates clockwise, the absolute value of the change rate of the vertical displacement of the outer cylinder is larger than a set first change rate threshold; and/or when the inner barrel rotates anticlockwise, the absolute value of the change rate of the vertical displacement of the outer barrel is larger than a set second change rate threshold value, and the occurrence of the high-bubble phenomenon is determined. The influence of different arrangement of the lifting ribs arranged in the inner cylinders of the washing machines of different types on the displacement of the outer cylinder in the vertical direction can be comprehensively considered, and the accuracy and the sensitivity of judging the high-bubble phenomenon are further improved.
An embodiment of the present invention further provides a bubble detection device for a washing machine, including: an obtaining unit adapted to obtain a vertical displacement mean value of an outer tub of the washing machine in each rotation speed cycle; a calculation unit adapted to calculate an absolute value of a vertical displacement change rate of a vertical displacement mean value of the outer tub with respect to a vertical displacement reference value of the outer tub in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam; and the determining unit is suitable for determining that the high bubble phenomenon occurs when the absolute value of the vertical displacement change rate is larger than a set change rate threshold value.
Optionally, the foam detection device of the washing machine further includes: the monitoring unit is suitable for recording the time of the high-bubble phenomenon after the determining unit determines that the high-bubble phenomenon occurs, and monitoring the duration of the high-bubble phenomenon; and the execution unit is suitable for executing defoaming operation after the duration of the high-bubble phenomenon reaches the preset duration.
Optionally, the washing machine comprises a rotating inner drum and an outer drum positioned outside the inner drum, wherein the inner drum rotates clockwise and anticlockwise alternately during the washing process; the calculation unit is suitable for calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise according to the vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise; and/or calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates anticlockwise according to the vertical displacement average value of the outer cylinder in each rotating speed cycle when the inner cylinder rotates anticlockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates anticlockwise.
Optionally, the determining unit is adapted to determine that an absolute value of a vertical displacement change rate of the outer cylinder is greater than a set first change rate threshold when the inner cylinder rotates clockwise; and/or when the inner barrel rotates anticlockwise, the absolute value of the change rate of the vertical displacement of the outer barrel is larger than a set second change rate threshold value, and the occurrence of the high-bubble phenomenon is determined.
The embodiment of the invention also provides a foam detection device of a washing machine, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of being operated on the processor, and the processor executes the steps of any one of the foam detection methods of the washing machine when executing the computer instructions.
An embodiment of the present invention further provides a washing machine, including: a rotating inner cylinder, an outer cylinder positioned outside the inner cylinder and a foam detection device of any one of the washing machines.
Drawings
Fig. 1 is a flowchart of a bubble detection method of a washing machine in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bubble detection device of a washing machine in an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, specific embodiments accompanied with figures are described in detail below.
Referring to fig. 1, a flowchart of a method for detecting bubbles in a washing machine according to an embodiment of the present invention is shown. The method specifically comprises the following steps:
and 11, acquiring a vertical displacement average value of the outer cylinder of the washing machine in each rotating speed cycle.
In one embodiment, the washing machine may include an outer tub and an inner tub, wherein the inner tub is located within the outer tub, and the motor may rotate the inner tub when the washing machine is in operation. In the washing process, the inner barrel rotates circularly according to a set rotating speed, and a corresponding rotating speed, a rotating direction and a rotating-stopping ratio are set in each rotating speed.
For example, after the time period T1 for the clockwise rotation of the inner barrel at the ith speed cycle, the stop time period T2, the counterclockwise rotation time period T3 and the stop time period T4 are provided. Within the inner barrel clockwise rotation time period T1, the inner barrel rotates clockwise for a number of revolutions. Within the duration of the counterclockwise rotation of the inner barrel, T3, the inner barrel rotates counterclockwise several revolutions. The values of T1, T2, T3 and T4 can be set according to actual requirements, and T1 and T3 can be the same or different; t2 may be the same as or different from T4.
When the drum-type washing machine is used for washing, water with detergent (washing liquid for short) is contained in the outer barrel and the inner barrel, clothes are contained in the inner barrel, a plurality of lifting ribs are arranged along the axial direction of the inner barrel, and the clothes are in a semi-soaking state in the inner barrel. When washing, the inner drum of the washing machine is driven by the motor to regularly rotate clockwise and anticlockwise, the clothes to be washed are lifted to be higher than the washing liquid level (preferably at the highest point) under the action of a plurality of lifting ribs in the inner drum, then the clothes freely fall into the washing liquid under the action of self gravity and generate a beating mechanical force, and the outer drum generates a certain displacement in the vertical direction under the action of the beating mechanical force generated by the clothes. With the continuous clockwise and anticlockwise rotation of the inner barrel, the clothes are repeatedly lifted and dropped continuously and are continuously collided with the washing liquid, so that the purposes of decontamination and cleaning are achieved.
In one embodiment, the outer drum is displaced in a vertical direction for each rotation of the inner drum, so that the outer drum is displaced in a plurality of vertical directions for one rotation cycle. The average vertical displacement of the outer cylinder of the washing machine in each rotation speed cycle can be obtained according to a plurality of corresponding vertical displacements of the outer cylinder.
In the embodiment of the invention, a displacement sensor can be adopted to collect the vertical displacement signal of the outer cylinder, and the vertical displacement of the outer cylinder can be obtained according to the collected displacement signal. The displacement sensor can adopt a contact type displacement sensor and also can adopt a non-contact type displacement sensor.
In specific implementation, the obtained vertical displacement signal of the outer cylinder in each rotation speed cycle can be processed, the displacement signal corresponding to the rotation speed of the motor being 0 is eliminated, the displacement signal in a period of time before the rotation speed being 0 and the displacement signal in a period of time after the rotation speed being 0 are eliminated, the displacement signal after the elimination processing is processed, and the displacement mean value of the outer cylinder in the vertical direction is obtained, so that the influence of corresponding data in the irregular washing state corresponding to the motor in starting and stopping on the vertical displacement mean value of the outer cylinder can be avoided, and the data reliability of the obtained vertical displacement mean value of the outer cylinder can be further improved.
And 12, calculating the absolute value of the vertical displacement change rate of the vertical displacement average value of the outer cylinder relative to the vertical displacement reference value of the outer cylinder in each rotating speed cycle.
In a specific implementation, during the normal washing process of the washing machine, the outer drum is influenced by the clothes in the inner drum, and a certain displacement is generated in the vertical direction. During the washing process, when bubbles are generated, a frictional force between the laundry and the drum is reduced. When a large amount of foams are generated, the mixed liquid of the foams and the water can generate buoyancy to the clothes, so that the integral gravity center of the clothes is improved, the lifted height of the clothes is reduced in the rotating process of the inner cylinder, the clothes can be influenced by the buoyancy of the mixed liquid when falling, the mechanical force of beating the clothes is weakened, and the vertical displacement of the outer cylinder is reduced relative to the vertical displacement before the foams appear at the moment.
The vertical displacement of the outer cylinder in m rotation speed cycles before the occurrence of the foam can be used as the reference value of the vertical displacement of the outer cylinder, and the absolute value of the vertical displacement change rate of the mean value of the vertical displacement of the outer cylinder in each rotation speed cycle relative to the reference value of the vertical displacement of the outer cylinder can be calculated. During each washing, the vertical displacement reference value of the outer cylinder corresponding to the current washing can be calculated according to the vertical displacement of the outer cylinder of m rotating speed cycles before the foam appears. When the types of clothes, the weight of the clothes, the adopted washing mode or the water quantity in the inner drum and other factors are different in each washing, the obtained vertical displacement reference values of the outer drum are correspondingly different, so that the vertical displacement reference values of the outer drum adopted in the foam detection can comprehensively consider influencing factors in each washing process in real time, and the accuracy of the foam detection can be improved.
In the embodiment of the present invention, taking the ith rotation speed cycle as an example, the following formula (1) and formula (2) can be used to calculate the absolute value Y of the vertical displacement change rate of the vertical displacement mean value of the outer cylinder relative to the vertical displacement reference value of the outer cylinder in the ith rotation speed cyclen。
Wherein, XnFor the n-th rotationMean vertical displacement of the outer barrel in rapid circulation, X0Is the mean value of the vertical displacement of the outer cylinder, XmIs the vertical displacement of the outer cylinder in the m-th revolution cycle before the occurrence of foam.
And step 13, determining that the high bubble phenomenon occurs when the absolute value of the change rate of the vertical displacement is larger than a set change rate threshold value.
In a specific implementation, after the absolute value of the vertical displacement change rate is calculated, whether the bubble phenomenon occurs or not can be determined according to the absolute value of the vertical displacement change rate and a set change rate threshold value. In the washing process of the washing machine, the foam amount reaches a set amount, namely the high foam phenomenon occurs.
And when the absolute value of the vertical displacement change rate is larger than the set change rate threshold value, determining that the high-bubble phenomenon occurs.
According to the scheme, the absolute value of the vertical displacement change rate of the outer barrel in each rotation speed cycle is determined according to the vertical displacement reference value of the average value of the vertical displacement of the outer barrel of the washing machine relative to the outer barrel in each rotation speed cycle. And when the absolute value of the vertical displacement change rate of the outer barrel in a certain rotation speed cycle is larger than a set change rate threshold value, determining that the high-bubble phenomenon occurs. The high-foam phenomenon can be monitored in real time in the washing stage, and the displacement reference value of the outer cylinder is the mean value of the vertical displacements of m rotating speed cycles before the foam appears, so that the influence of factors such as the type and weight of clothes on the foam detection can be avoided, and the detection accuracy of the high-foam phenomenon can be improved.
In specific implementation, after the occurrence of the high-bubble phenomenon is determined, the time for the occurrence of the high-bubble phenomenon can be recorded, and the duration of the high-bubble phenomenon is monitored; when the duration of the high-bubble phenomenon reaches the preset duration, the defoaming operation is executed, so that when the high-bubble phenomenon occurs, defoaming treatment can be carried out in time according to actual requirements, and bubble overflow or water overflow is avoided.
Because the arrangement of the lifting ribs arranged in the inner cylinders of the washing machines of different types is different, some lifting ribs can be symmetrically arranged, and some lifting ribs are asymmetrically arranged. When the lifting ribs in the inner barrel are arranged asymmetrically, because the structures of two sides are different, in the washing process of the washing machine, the inner barrel rotates clockwise and anticlockwise alternately, the acting force of the lifting ribs on the clothes in the inner barrel and the acting force of the mixed liquid are different, and therefore the influence degree on the displacement of the outer barrel in the vertical direction is different. Therefore, in order to improve the accuracy and sensitivity of the determination of the high bubble phenomenon, in some embodiments of the present invention, in the step 12, when calculating the absolute value of the vertical displacement change rate of the vertical displacement average value of the outer cylinder relative to the vertical displacement reference value of the outer cylinder in each rotation speed cycle, at least one of the following may be included:
In an embodiment of the present invention, an absolute value of a vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise is calculated according to a vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and a vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise.
In another embodiment of the present invention, the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates counterclockwise is calculated according to the average value of the vertical displacement of the outer cylinder in each rotation speed cycle when the inner cylinder rotates counterclockwise and the reference value of the vertical displacement of the outer cylinder when the inner cylinder rotates counterclockwise.
In still another embodiment of the present invention, an absolute value of a vertical displacement change rate of the outer tub when the inner tub rotates clockwise is calculated based on a vertical displacement average of the outer tub in each rotation speed cycle when the inner tub rotates clockwise and a vertical displacement reference value of the outer tub when the inner tub rotates clockwise, and an absolute value of a vertical displacement change rate of the outer tub when the inner tub rotates counterclockwise is calculated based on a vertical displacement average of the outer tub in each rotation speed cycle when the inner tub rotates counterclockwise and a vertical displacement reference value of the outer tub when the inner tub rotates counterclockwise.
Accordingly, in step 13, when the absolute value of the vertical displacement change rate is greater than the set change rate threshold, it is determined that the bubble phenomenon occurs, which may include the following cases:
in an embodiment of the present invention, when the inner cylinder rotates clockwise, an absolute value of a vertical displacement change rate of the outer cylinder is greater than a set first change rate threshold, and it is determined that a bubble phenomenon occurs.
In a specific implementation, the first variation threshold is a vertical displacement average value of the outer cylinder corresponding to the clockwise rotation of the inner cylinder in m rotation speed cycles before the occurrence of the foam.
In another embodiment of the present invention, when the inner cylinder rotates counterclockwise, the absolute value of the vertical displacement change rate of the outer cylinder is greater than a set second change rate threshold, and it is determined that a bubble phenomenon occurs.
In a specific implementation, the second variation threshold is a vertical displacement average value of the outer cylinder when the inner cylinder rotates counterclockwise in m rotation speed cycles before the occurrence of the foam.
In still another embodiment of the present invention, when the inner cylinder rotates clockwise, the absolute value of the rate of change of the vertical displacement of the outer cylinder is greater than a set first rate threshold, and when the inner cylinder rotates counterclockwise, the absolute value of the rate of change of the vertical displacement of the outer cylinder is greater than a set second rate threshold, and it is determined that the blister phenomenon occurs.
In specific implementation, when the inner cylinder rotates clockwise, the time of occurrence of high bubbles is recorded, and when the duration of the high bubbles in the clockwise direction reaches a set duration, the bubble removing operation is executed.
In specific implementation, when the inner barrel rotates counterclockwise, the time of occurrence of high bubbles is recorded, and when the duration of the high bubbles in the counterclockwise direction reaches a set duration, a bubble removing operation is performed, wherein the duration of the high bubbles in the clockwise direction may be the same as or different from the duration of the high bubbles in the counterclockwise direction, and the setting may be specifically performed according to practical application scenarios such as the type of the washing machine, the washing mode, and the like.
In order to facilitate better understanding and implementation of the present invention for those skilled in the art, the embodiment of the present invention also provides a bubble detecting device for a washing machine.
Referring to fig. 2, a schematic structural diagram of a bubble detecting device of a washing machine according to an embodiment of the present invention is shown. The bubble detecting device 20 of the washing machine may include: an obtaining unit 21, a calculating unit 22 and a determining unit 23, wherein:
an obtaining unit 21 adapted to obtain a mean value of the vertical displacement of the outer tub of the washing machine in each rotation speed cycle;
a calculation unit 22 adapted to calculate an absolute value of a vertical displacement change rate of a vertical displacement mean value of the outer tub with respect to a vertical displacement reference value of the outer tub in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam;
A determining unit 23 adapted to determine that a bubbly phenomenon occurs when an absolute value of the rate of change of the vertical displacement is greater than a set rate threshold.
In an implementation, the foam detecting apparatus 20 of the washing machine may further include: the monitoring unit 24 is suitable for recording the time when the high-bubble phenomenon occurs after the determining unit determines that the high-bubble phenomenon occurs, and monitoring the duration of the high-bubble phenomenon; and the execution unit 25 is suitable for executing the defoaming operation after the duration of the high-bubble phenomenon reaches the preset duration.
In a specific implementation, the washing machine comprises a rotating inner drum and an outer drum positioned outside the inner drum, and the inner drum rotates clockwise and anticlockwise alternately during the washing process; the calculating unit 22 is adapted to calculate an absolute value of a vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise according to a vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and a vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise; and/or calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates anticlockwise according to the vertical displacement average value of the outer cylinder in each rotating speed cycle when the inner cylinder rotates anticlockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates anticlockwise.
In a specific implementation, the determining unit 23 is adapted to determine that an absolute value of a vertical displacement change rate of the outer cylinder is greater than a set first change rate threshold when the inner cylinder rotates clockwise; and/or when the inner barrel rotates anticlockwise, the absolute value of the change rate of the vertical displacement of the outer barrel is larger than a set second change rate threshold value, and the occurrence of the high-bubble phenomenon is determined.
In a specific implementation, the working principle and the working flow of the foam detection device 20 of the washing machine may refer to the description of the foam detection method of the washing machine provided in the above embodiment of the present invention, and are not described herein again.
The embodiment of the invention further provides a foam detection device of a washing machine, which comprises a memory and a processor, wherein the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of any one of the washing machine foam detection methods provided by the above embodiments of the invention when executing the computer instructions.
An embodiment of the present invention provides a washing machine including: the washing machine comprises a rotary inner barrel, an outer barrel positioned outside the inner barrel and a foam detection device of the washing machine. The foam detecting device of the washing machine may adopt any one of the foam detecting devices 20 of the washing machine provided by the above embodiments of the present invention.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in any computer readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for detecting bubbles in a washing machine, comprising:
acquiring a vertical displacement average value of an outer cylinder of the washing machine in each rotation speed cycle;
calculating an absolute value of a vertical displacement change rate of a vertical displacement mean value of the outer cylinder relative to a vertical displacement reference value of the outer cylinder in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam;
and when the absolute value of the change rate of the vertical displacement is larger than a set change rate threshold value, determining that the high-bubble phenomenon occurs.
2. The suds detection method of a washing machine as claimed in claim 1, further comprising, after determining that the high-sudsing phenomenon occurs:
recording the time when the high-bubble phenomenon occurs, and monitoring the duration of the high-bubble phenomenon;
and when the duration of the high bubble phenomenon reaches a preset duration, executing defoaming operation.
3. The bubble detecting method of a washing machine according to claim 1 or 2, wherein the washing machine comprises a rotating inner tub and an outer tub located outside the inner tub, and the inner tub alternately performs clockwise rotation and counterclockwise rotation during washing; the calculating the absolute value of the vertical displacement change rate of the vertical displacement mean value of the outer cylinder relative to the vertical displacement reference value of the outer cylinder in each rotation speed cycle comprises at least one of the following steps:
calculating an absolute value of a vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise according to a vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and a vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise;
and calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates anticlockwise according to the vertical displacement average value of the outer cylinder in each rotating speed cycle when the inner cylinder rotates anticlockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates anticlockwise.
4. The suds detection method of a washing machine as claimed in claim 3, wherein said determining that a high-sudsing phenomenon occurs when the absolute value of the rate of change of the vertical displacement is greater than a set rate of change threshold comprises:
when the inner cylinder rotates clockwise, the absolute value of the change rate of the vertical displacement of the outer cylinder is larger than a set first change rate threshold; and/or the presence of a gas in the gas,
when the inner cylinder rotates anticlockwise, the absolute value of the vertical displacement change rate of the outer cylinder is larger than a set second change rate threshold value, and the occurrence of the high-bubble phenomenon is determined.
5. A suds sensing device (20) for a washing machine, comprising:
an acquisition unit (21) adapted to acquire a mean value of the vertical displacements of the outer tub of the washing machine in each rotation speed cycle;
a calculation unit (22) adapted to calculate an absolute value of a vertical displacement change rate of a vertical displacement mean value of the tub with respect to a vertical displacement reference value of the tub in each rotation speed cycle; wherein the vertical displacement reference value of the outer cylinder is the vertical displacement average value of m rotation speed cycles before the occurrence of foam;
a determination unit (23) adapted to determine that a blistering phenomenon occurs when an absolute value of the rate of change of the vertical displacement is greater than a set rate of change threshold.
6. The suds sensing device (20) of a washing machine, as claimed in claim 5, further comprising:
the monitoring unit (24) is suitable for recording the time when the high-bubble phenomenon occurs after the determining unit determines that the high-bubble phenomenon occurs, and monitoring the duration of the high-bubble phenomenon;
and the execution unit (25) is suitable for executing defoaming operation when the duration of the high-bubble phenomenon reaches a preset duration.
7. The bubble detecting device (20) of a washing machine according to claim 5 or 6, wherein the washing machine comprises a rotating inner tub and an outer tub located outside the inner tub, the inner tub alternately performing clockwise rotation and counterclockwise rotation during washing; the calculating unit (22) is suitable for calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates clockwise according to the vertical displacement average value of the outer cylinder in each rotation speed cycle when the inner cylinder rotates clockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates clockwise; and/or calculating the absolute value of the vertical displacement change rate of the outer cylinder when the inner cylinder rotates anticlockwise according to the vertical displacement average value of the outer cylinder in each rotating speed cycle when the inner cylinder rotates anticlockwise and the vertical displacement reference value of the outer cylinder when the inner cylinder rotates anticlockwise.
8. The suds sensing device (20) of a washing machine as claimed in claim 7, wherein said determining unit (23) is adapted to determine that the absolute value of the rate of change of the vertical displacement of said tub is greater than a set first rate of change threshold when said tub is rotated clockwise; and/or when the inner barrel rotates anticlockwise, the absolute value of the change rate of the vertical displacement of the outer barrel is larger than a set second change rate threshold value, and the occurrence of the high-bubble phenomenon is determined.
9. A suds sensing device for a washing machine, comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, characterized in that said processor, when executing said computer instructions, performs the steps of the suds sensing method of a washing machine according to any one of claims 1 to 4.
10. A washing machine, characterized by comprising: a rotating inner tub, an outer tub located outside the inner tub, and the bubble detecting device of the washing machine according to any one of claims 6 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312017.3A CN111850961B (en) | 2019-04-17 | 2019-04-17 | Washing machine and foam detection method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312017.3A CN111850961B (en) | 2019-04-17 | 2019-04-17 | Washing machine and foam detection method and device thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN111850961A true CN111850961A (en) | 2020-10-30 |
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