CN112941803B - Control method of washing machine and washing machine - Google Patents
Control method of washing machine and washing machine Download PDFInfo
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- CN112941803B CN112941803B CN201911170706.1A CN201911170706A CN112941803B CN 112941803 B CN112941803 B CN 112941803B CN 201911170706 A CN201911170706 A CN 201911170706A CN 112941803 B CN112941803 B CN 112941803B
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- 238000005406 washing Methods 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 202
- 238000002310 reflectometry Methods 0.000 claims abstract description 25
- 238000005303 weighing Methods 0.000 claims description 11
- 239000003599 detergent Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000005507 spraying Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010412 laundry washing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention discloses a control method of a washing machine and the washing machine, and relates to the field of washing equipment. The control method is that the photoelectric sensor is controlled by the washing machine to emit light into the inner barrel, and the height of the clothes and the height of the water level are judged according to the reflection time and/or the reflectivity of the light. The washing machine can respectively feed back and calculate the water level height and the clothes height by arranging the sensor, so that hardware setting is saved and the cost is reduced; the washing machine can adjust the water level of the inlet water according to the actual height of the clothes, saves the consumption of water and detergent, and prevents overflow by judging.
Description
Technical Field
The invention belongs to the field of washing equipment, and particularly relates to a control method of a washing machine and the washing machine.
Background
In the prior art, a method for weighing clothes is generally adopted to select water level corresponding to the weight of the clothes to feed water, the method for weighing adopts current generated by a motor when an inner barrel rotates to carry out fuzzy weighing, and then the gear of water feeding is judged according to the weight. In order to ensure the washing effect, the method for selecting the water inlet level enables washing water to submerge clothes, and the washing machine generally selects a larger water inlet gear according to program setting and cannot correspondingly adjust according to the actual height of the clothes, so that water resources and detergents are wasted. The washing machine generally sets a water level sensor to feed back the water level, but the water level sensor can feed back only the water level but not the height of laundry.
Because the clothes have different properties, for example, the clothes such as down jackets and the like have more air in the clothes, the clothes have larger volume under smaller weight, possibly float on the water surface in the water inlet process, the properties of the clothes are judged only through a program selected by a user in the prior art, and the washing machine should select different treatment modes with common clothes according to the conditions so as to achieve better treatment effect.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a control method capable of simultaneously acquiring the height of clothes and the height of water surface through a photoelectric sensor and selecting the water inlet level according to the height of the clothes, and a washing machine with the method, which can save water and ensure good washing effect.
In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:
A control method of a washing machine, the washing machine is provided with a photoelectric sensor for detecting the height of clothes and the height of water level in an inner barrel, the washing machine controls the photoelectric sensor to emit light rays into the inner barrel, and the height of clothes and the height of water level are judged according to the reflection time and/or the reflectivity of the light rays.
In one embodiment, the washing machine judges the height of clothes and the height of water level according to the reflection time of light rays, the photoelectric sensor emits a plurality of light rays into the inner barrel at the same time, and the washing machine calculates the height corresponding to each light ray to form a height data set relative to the bottom of the inner barrel according to the reflection time of the plurality of light rays;
When the height data set comprises a plurality of similar height values, the washing machine takes the average value of the plurality of similar height values as the water surface height, and takes the average value of other height values in the height data set as the clothes height;
preferably, when the height data set has a height value close to zero, the washing machine calculates the average value after excluding the height value close to zero.
Specifically, when the washing machine does not feed water, the washing machine excludes height values close to zero in the height data set, the average value of the rest height values is used as the initial clothes height, and in the water feeding process of the washing machine, the washing machine excludes a plurality of similar height values, and the average value of the rest height values is used as the real-time clothes height.
The washing machine further comprises a weighing device for weighing the weight of the clothes in the inner barrel, and the washing machine judges whether the clothes are suitable for selecting the water inlet level according to the height of the clothes or not through the initial height of the clothes and the weight of the clothes;
a corresponding preset height interval is preset for a certain clothes weight, when the initial clothes height exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water inlet level according to the height, and the washing machine selects the water level corresponding to the clothes weight to control water inlet;
When the initial clothes height is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the clothes height, and the washing machine selects the water level corresponding to the initial clothes height to control water inlet.
Further, when the washing machine judges that the clothes are suitable for selecting the water inlet level according to the clothes height, the washing machine sets the warning water level according to the clothes weight, when the washing machine feeds water according to the clothes height, and when the real-time water level height exceeds the warning water level, the washing machine controls water feeding to stop so as to prevent overflow.
In the water inlet process of the washing machine, when the real-time clothes height does not exceed the initial clothes height, the washing machine obtains the real-time water level height, and when the real-time water level height exceeds the real-time clothes height or the real-time water level height exceeds the real-time clothes height by a certain distance, the washing machine controls water inlet to stop.
The clothes possibly float on the water surface in the water inlet process, and when the real-time clothes height exceeds the initial clothes height, the washing machine judges that the clothes are in a floating state and controls the pulsator to rotate;
When the real-time clothes height is not higher than the initial clothes height after the pulsator rotates, the washing machine controls water inlet to stop when the water level height exceeds the real-time clothes height or when the real-time water level height exceeds the real-time clothes height by a certain distance;
when the real-time clothes height is still higher than the initial clothes height after the pulsator rotates, the washing machine controls water inlet to stop after the real-time clothes height exceeds the initial clothes height by a certain distance.
The washing machine selects a water inlet level according to the laundry height in a washing process, and selects a water inlet level according to the laundry weight/laundry height in a rinsing process;
preferably, the washing machine controls water inflow to stop when the real-time water level exceeds the real-time clothes level by a certain distance h1 in the washing process, and controls water inflow to stop when the real-time water level exceeds the real-time clothes level by a certain distance h2 in the rinsing process, wherein h2 is more than h1.
In another embodiment, the washing machine judges the source of the reflected light according to the reflectivity of the light, and calculates the height/water level of the clothes according to the reflection time of the light;
Preferably, the washing machine is preset with a first reflectivity section and a second reflectivity section, when the reflectivity of the light falls into the first reflectivity section, the washing machine judges that the light is reflected from the water surface, and when the reflectivity of the light falls into the second reflectivity section, the washing machine judges that the light is reflected from the clothes.
The invention also comprises a washing machine with the control method, wherein the washing machine is provided with a photoelectric sensor for detecting the height of clothes and the height of water level in the inner barrel;
Preferably, the washing machine is provided with an upward clothes putting opening, an upper cover is arranged at the clothes putting opening, and a photoelectric sensor is arranged on one side of the upper cover, facing the inner barrel.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
(1) The washing machine can measure the water level height and the clothes height respectively by arranging a sensor, hardware setting is saved by a calculation mode, and the cost of the washing machine is reduced;
(2) The washing machine can adjust the water level of the inlet water according to the actual height of the clothes, so that the water and the consumption of the washing agent can be saved while the clothes are submerged to achieve a better washing effect;
(3) The washing machine makes a judgment on the clothes unsuitable for selecting the water inlet level with the height of the clothes, so as to prevent the overflow condition.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a schematic view of a photosensor provided in a washing machine of the present invention;
FIGS. 2 to 3 are schematic views illustrating an embodiment of a control method of a washing machine according to the present invention;
Fig. 4 is a schematic view of another embodiment of a control method of the washing machine of the present invention.
In the figure: 1. a washing machine; 11. an upper cover; 12. a photoelectric sensor.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, the present invention relates to a washing machine 1, which may be a pulsator type washing machine, having a washing tub disposed in a vertical direction, and may include an inner tub and an outer tub, the top of the washing tub having an opening, the opening of the washing tub and the opening of a tub of the washing machine forming a laundry putting opening, an upper cover 11 being disposed at the laundry putting opening, and the upper cover of the washing machine being in a closed state during laundry washing.
The upper cover 11 of the washing machine is provided with the photoelectric sensor 12, and the photoelectric sensor 12 can emit light and can receive reflected light and calculate the distance travelled by the light according to the time difference between the emitted light and the received light. The photoelectric sensor 12 can emit light into the inner tub, and the water level height and the laundry height can be obtained by calculating or judging the reflected light of the photoelectric sensor by the washing machine.
As shown in fig. 1, the photosensor 12 is provided on the upper cover 11 of the washing machine, and is capable of emitting light into the inner tub, so that the photosensor is provided on a side of the upper cover facing the inner tub. The photoelectric sensor is preferably disposed at the middle portion of the upper cover in alignment with the axis of the inner tub to ensure that the light emitted from the photoelectric sensor can be uniformly distributed inside the inner tub.
The invention also comprises a control method of the washing machine, wherein the photoelectric sensor emits light into the inner barrel, the light can reflect when reaching the water surface or the surface of clothes, and the reflected light is captured by the photoelectric sensor after a certain reflection time, so that the distance between the water surface or the surface of the clothes and the photoelectric sensor can be calculated according to the reflection time. Because the size of the inner barrel is fixed, the distance between the bottom of the inner barrel and the photoelectric sensor is fixed, and when the distance between the surface of the water or the surface of the clothes and the photoelectric sensor is obtained, the height between the surface of the water or the surface of the clothes and the bottom of the inner barrel, namely the water level height/the clothes height, can be obtained.
The judging method for distinguishing whether the reflected light is reflected by the water surface or the clothing surface can judge through the reflecting time of the light and can judge through the reflectivity of the light.
Example 1
In this embodiment, the source of the reflected light is determined according to the reflection time of the light, as shown in fig. 2.
The principle of this embodiment is that the photoelectric sensor emits multiple beams of light into the inner tub simultaneously, and the washing machine calculates the height corresponding to each beam of light relative to the bottom of the inner tub according to the reflection time of the multiple beams of light to form a height data set, and the heights of the water surface at all positions are equal without considering the fluctuation of the water surface, so that the heights are considered to be the water surface heights when n beams of light therein all correspond to the same height. The heights of the respective light rays reflected after each light ray irradiates the laundry are different, so that when the laundry and water are contained in the inner tub, the other light rays except the n light rays are considered to be reflection lines irradiated on the laundry, and the average value of the heights of the remaining light rays is calculated to be the height of the laundry. Generally, when the water level exceeds the height of clothes, water inlet can be stopped, so that water just flows out of the clothes, and the purpose of saving water is achieved.
Specifically, for example, the photosensor simultaneously emits x-rays into the inner tub, wherein reflected rays of the x-rays are reflected to the sensor over time t1, t2, t3 … … tx. The washing machine can calculate the corresponding heights H1, H2 and H3 … … Hx according to the reflection times t1, t2 and t3 … … tx, and the plurality of groups of height data groups are formed.
When the height data set includes a plurality of similar height values, the washing machine takes an average value of the plurality of similar height values as the water surface height, and after the washing machine obtains the height array, when H1, H2, H3 … … Hn has only a slight difference or is equal, it can be considered that the light corresponding to H1, H2, H3 … … Hn is reflected by the water surface, so that the water surface height HW is obtained after H1, H2, H3 … … Hn is averaged.
The light corresponding to the other height values hn+1 … … Hx in the other height data set may be considered as reflected by the laundry, and hn+1 … … Hx is averaged as the laundry height HC.
The distance H between the inner barrel bottom and the light sensor is a fixed value, and when the reflection time of the light is t, the reflection distance is C multiplied by t (C is the light speed). The height relative to the bottom of the inner barrel can be converted into H-Ct, and the height data in the height data set are obtained in the calculation mode.
The photoelectric sensor detects the time difference between when light is emitted and when reflected light is received, but the distance travelled by the emitted light and the reflected light is equal, and the time is the same, so that the reflection time corresponding to the reflected light is half of the time difference.
When there is no water in the inner tub, the light emitted by the photoelectric sensor may reach the bottom of the inner tub and then be reflected, the calculated height value is close to zero, and when the height value is close to zero in the height data set, the washing machine excludes the height value close to zero and then calculates the average value.
In the actual washing process, the photoelectric sensor can detect the height of clothes and the height of water level in the water inlet process, and can detect the height of clothes when water is not fed. Specifically, when the washing machine does not feed water, the washing machine excludes height values close to zero in the height data set, and takes the average value of the rest height values as an initial clothes height HCi, and during the water feeding process of the washing machine, the washing machine excludes a plurality of similar height values, and takes the average value of the rest height values as a real-time clothes height HCc.
In general, the height of the clothes will not change in the water inlet process, i.e. hcc=hci, but still some clothes will be larger than or smaller than the initial clothes height HCi in real time in the water inlet process.
For example, when the clothes are down jackets, the heights of the clothes have larger values when water is not fed because a large amount of air is contained in the down jackets, and the heights of the clothes are reduced because the water flow blows the clothes during the water feeding process to discharge the air in the clothes; when the clothes are made of lighter materials, the clothes possibly float on the water surface in the water inlet process, and the height of the clothes increases along with the increase of the water level in real time.
The fluffy clothes such as the down jackets have smaller weight, but the clothes have larger volume and larger height when put into the inner barrel, so the down jackets are not suitable for selecting the water inlet level according to the height of the clothes, otherwise, excessive water can be introduced to cause waste of water resources.
For fluffy clothes, the following method is adopted to judge whether the water inlet level is suitable for being selected according to the height of the clothes:
As shown in fig. 3, a general washing machine is provided with a weighing device for weighing the laundry in an inner tub, and the washing machine of the present invention further includes a weighing device for weighing the laundry in the inner tub, and the washing machine judges whether the laundry is suitable for selecting a water intake level according to the laundry height through an initial laundry height and the laundry weight. Specifically, a certain clothes weight is preset with a corresponding preset height interval, when the initial clothes height exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water inlet level according to the height, and the washing machine selects the water level corresponding to the clothes weight to control water inlet; when the initial clothes height is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the clothes height, and the washing machine selects the water level corresponding to the initial clothes height to control water inlet.
In order to facilitate the description of the control process, the values of the parameters involved in the control process are described, but the values are only used for describing the technical scheme and are not real data in actual operation. For example, when the weight of the laundry is 1kg, the preset height interval is 10-20cm, when the weight of the laundry in the inner tub is 1kg, whether the initial laundry height HCi is within the preset height interval is judged, and when hci=15 cm, the initial laundry height HCi is within the preset height interval, the fluffiness degree of the laundry is proved to be not great, so that the laundry height is suitable for selecting the water inlet level to save water resources; when hci=25 cm, if the preset height interval is exceeded, the fluffiness of the laundry is proved to be large, so that the laundry in the inner tub is not suitable for selecting the water inlet level according to the laundry height in order to avoid the situation that the water inlet level is too high.
Further, in order to avoid the overflow accident, when the washing machine judges that the clothes are suitable for selecting the water inlet level according to the clothes height, the washing machine can set the warning water level according to the clothes weight, wherein the warning water level is generally a higher water level or a highest water level, and when the washing machine is used for water inlet according to the clothes height, the washing machine controls the water inlet to stop when the real-time water level height exceeds the warning water level.
The control method for the water inlet process specifically comprises the steps that in the water inlet process of the washing machine, when the real-time clothes height HCc does not exceed the initial clothes height HCi, the washing machine obtains the real-time water level HWc, and when the real-time water level HWc exceeds the real-time clothes height HCc or the real-time water level HWc exceeds the real-time clothes height HCc by a certain distance h1, the washing machine controls water inlet to stop.
In general, water in the inner tub of the washing machine can submerge clothes to achieve a good washing effect, but in order to ensure that the clothes have a fully stirred space in the washing water, the water level can be slightly higher than the clothes so as to ensure that the clothes can be smoothly stirred.
Due to the influence of the material of the laundry or other factors, the height of the laundry in the inner tub may be changed, for example, the laundry floats in the water, so that the real-time laundry height HCc exceeds the initial laundry height HCi, and at this time, if the water inlet is controlled to stop by the method that the real-time water level height exceeds the real-time laundry height, it is not feasible, and therefore, the washing machine needs to determine whether the laundry is in a floating state.
When the real-time laundry height HCc exceeds the initial laundry height HCi, the washing machine judges that the laundry is in a floating state. When the clothes float on the water surface, the temporary phenomenon caused by the fact that air in the clothes is not discharged can be only caused, the clothes can be rolled into or pressed into water by controlling the rotation of the impeller or spraying the clothes, so that the air is released from the clothes, the floating condition of the clothes can be improved after the clothes are submerged in the water, and the judging process of the water level can be continued.
After the pulsator or the spraying of the laundry, if the real-time laundry height HCc is not higher than the initial laundry height HCi, it is indicated that the laundry is not floated any more, and at this time, the water cut-off control may be performed by comparing the water level height with the laundry height. The control is further that the water inlet is controlled to stop when the water level of the washing machine exceeds the real-time clothes level or the real-time water level exceeds the real-time clothes level by a certain distance h 1.
After the pulsator rotates or sprays the laundry, if the real-time laundry height HCc is still higher than the initial laundry height HCi, it may be considered that the laundry cannot be improved in a floating state of the laundry by the pulsator rotation or spraying due to its own property or other reasons at this time, so that the washing machine controls the water supply to be stopped after the real-time laundry height HCc exceeds the initial laundry height HCi by a short distance or for a short time to prevent the water level from being excessively high.
The water level of the washing machine is selected to just submerge clothes in the washing process, so that good mutual friction is achieved, and good washing effect is achieved.
In the control method of the washing machine, in order to achieve the aim of saving washing water, the washing machine selects the water inlet level according to the height of clothes in a washing procedure, and in a rinsing procedure, the washing machine can select the water inlet level of rinsing water according to the weight of the clothes, and the water inlet level of rinsing water according to the height of the clothes.
When the washing machine always selects the water inlet level in the rinsing process, a certain water saving purpose can be achieved. But the water inflow at this time is slightly different. The control method can be as follows: when the real-time water level of the clothes machine exceeds the real-time clothes height by a certain distance h1 in the washing process, the washing machine controls water inlet to stop, and when the real-time water level of the washing machine exceeds the real-time clothes height by a certain distance h2 in the rinsing process, the washing machine controls water inlet to stop, wherein h2 is more than h1.
Example two
The difference between this embodiment and the previous embodiment is that the washing machine determines the source of the reflected light according to the reflectivity of the light, calculates the height of the laundry from the reflection time of the light from the laundry, and calculates the height of the water level from the reflection time of the light from the water surface, as shown in fig. 4.
Because the properties of the water surface and the clothing surface are different, the reflectivity of the water surface and the clothing surface to light is also different, and the difference of the properties can be used for the photoelectric sensor to judge the source of the reflected light, so that the corresponding height is judged according to the source of the reflected light.
Specifically, the washing machine is preset with a first reflectivity section and a second reflectivity section, when the reflectivity of the light falls into the first reflectivity section, the washing machine judges that the light is reflected from the water surface, and when the reflectivity of the light falls into the second reflectivity section, the washing machine judges that the light is reflected from the clothes.
The reflectivity of the light is the ratio of the intensity of the reflected light received by the photoelectric sensor to the intensity of the emitted light emitted by the photoelectric sensor.
The distance H between the inner barrel bottom and the light sensor is a fixed value, and when the reflection time of the light is t, the reflection distance is C multiplied by t (C is the light speed). And the height relative to the inner tub bottom may be converted into H-Ct. The photoelectric sensor detects the time difference between when the light is emitted and when the reflected light is received, but the distance travelled by the emitted light and the reflected light is equal, and the time is the same, so that the reflection time corresponding to the light is half of the time difference. Correspondingly, when the reflectivity of the light falls into the first reflectivity interval, the height is calculated according to the reflection time of the light, namely the water surface height, and when the reflectivity of the light falls into the second reflectivity interval, the height is calculated according to the reflection time of the light, namely the clothes height.
In the control method of the washing machine in the two embodiments, the washing machine can respectively measure the water level height and the clothes height by arranging one sensor, and hardware setting is saved by a calculation mode, so that the cost of the washing machine is reduced; the washing machine can adjust the water level of the inlet water according to the actual height of the clothes, so that the water and the consumption of the washing agent can be saved while the clothes are submerged to achieve a better washing effect; the washing machine makes a judgment on the clothes unsuitable for selecting the water inlet level with the height of the clothes, so as to prevent the overflow condition.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.
Claims (13)
1. A control method of a washing machine is characterized in that the washing machine is provided with a photoelectric sensor for detecting the height of clothes and the height of water level in an inner barrel, the washing machine controls the photoelectric sensor to emit light rays into the inner barrel, and the height of the clothes and the height of water level are judged through the reflection time and/or the reflectivity of the light rays;
The photoelectric sensor emits a plurality of light beams into the inner barrel at the same time, and the washing machine calculates the height corresponding to each light beam relative to the bottom of the inner barrel according to the reflection time of the plurality of light beams to form a height data group;
When the washing machine does not feed water, the washing machine excludes the height value close to zero in the height data set, and takes the average value of the rest height values as the initial clothing height;
The washing machine further comprises a weighing device for weighing the weight of the clothes in the inner tub, and the washing machine judges whether the clothes are suitable for selecting the water inlet level according to the height of the clothes through the initial height of the clothes and the weight of the clothes;
A corresponding preset height interval is preset for a certain clothes weight, when the initial clothes height exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water inlet level according to the height, and the washing machine selects the water level corresponding to the clothes weight to control water inlet; when the initial clothes height is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the clothes height, and the washing machine selects the water level corresponding to the initial clothes height to control water inlet.
2. The control method of a washing machine according to claim 1, wherein when the height data set includes a plurality of similar height values, the washing machine takes an average value of the plurality of similar height values as a water surface height and takes an average value of other height values in the height data set as a laundry height.
3. The control method of a washing machine according to claim 2, wherein when the height data set has a height value close to zero, the washing machine calculates the average value after excluding the height value close to zero.
4. The control method of a washing machine according to claim 1, wherein the washing machine excludes a plurality of similar height values during water intake of the washing machine, and takes an average value of the remaining height values as the real-time laundry height.
5. The control method of a washing machine according to claim 1, wherein the washing machine sets a warning water level according to a laundry weight when the washing machine judges that laundry is suitable for selecting the water intake level according to the laundry height, and controls the water intake to be stopped when the real-time water level exceeds the warning water level when the washing machine is water intake according to the laundry height.
6. The control method of a washing machine as claimed in claim 4, wherein the washing machine obtains a real-time water level when the real-time laundry level does not exceed the initial laundry level during the water intake, and controls the water intake to be stopped when the real-time water level exceeds the real-time laundry level.
7. The control method of the washing machine as claimed in claim 6, wherein the washing machine judges that the laundry is in a floating state and controls the pulsator to rotate when the real-time laundry height exceeds the initial laundry height;
When the real-time clothes height is not higher than the initial clothes height after the pulsator rotates, the washing machine controls water inlet to stop when the water level height exceeds the real-time clothes height or when the real-time water level height exceeds the real-time clothes height by a certain distance h 1;
when the real-time clothes height is still higher than the initial clothes height after the pulsator rotates, the washing machine controls water inlet to stop after the real-time clothes height exceeds the initial clothes height by a certain distance.
8. The control method of a washing machine as claimed in claim 6, wherein the washing machine selects the water intake level according to the laundry height during the washing course, and the washing machine selects the water intake level according to the laundry weight/laundry height during the rinsing course.
9. The control method of a washing machine according to claim 8, wherein the washing machine controls water inflow to be stopped when the real-time water level exceeds the real-time laundry level by a certain distance h1 during a washing process, and controls water inflow to be stopped when the real-time water level exceeds the real-time laundry level by a certain distance h2 during a rinsing process, h2 > h1.
10. The control method of a washing machine as claimed in claim 1, wherein the washing machine judges a source of the reflected light according to a reflectivity of the light, and calculates the laundry height/water level height by a reflection time of the light.
11. The method according to claim 10, wherein the washing machine is preset with a first reflectance interval and a second reflectance interval, and the washing machine judges that the light is reflected from the water surface when the reflectance of the light falls within the first reflectance interval, and judges that the light is reflected from the laundry when the reflectance of the light falls within the second reflectance interval.
12. A washing machine having a control method as claimed in any one of claims 1 to 11, wherein the washing machine has a photosensor for detecting the height of laundry and the height of water level in the inner tub.
13. The washing machine as claimed in claim 12, wherein the washing machine has an upward laundry putting opening, an upper cover is provided at the laundry putting opening, and a photoelectric sensor is provided at a side of the upper cover facing the inner tub.
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