CN112941803A - Control method of washing machine and washing machine - Google Patents
Control method of washing machine and washing machine Download PDFInfo
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- CN112941803A CN112941803A CN201911170706.1A CN201911170706A CN112941803A CN 112941803 A CN112941803 A CN 112941803A CN 201911170706 A CN201911170706 A CN 201911170706A CN 112941803 A CN112941803 A CN 112941803A
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- 238000005406 washing Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 203
- 238000002310 reflectometry Methods 0.000 claims abstract description 31
- 238000005303 weighing Methods 0.000 claims description 11
- 239000008400 supply water Substances 0.000 claims 1
- 239000003599 detergent Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000004075 alteration 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
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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 washing machine provided by the invention is provided with the photoelectric sensor for detecting the height of clothes and the height of water level in the inner barrel, the control method is that the washing machine controls the photoelectric sensor to emit light rays to 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 rays. The washing machine can respectively feed back and calculate the water level height and the clothes height by arranging the sensor, so that the hardware arrangement is saved, and the cost is reduced; the washing machine can adjust the water level of inlet water according to the actual height of clothes, save the using amount of water and detergent, and prevent the overflow condition by judgment.
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 washing machine generally adopts a method of weighing clothes to select a water level corresponding to the weight of the clothes for water inflow, and the weighing method adopts current generated by a motor when an inner barrel rotates to carry out fuzzy weighing, and then judges the gear of the water inflow according to the weight. In order to ensure the washing effect and ensure that the washing water submerges the clothes, the washing machine generally selects a larger water inlet gear according to the program setting, and cannot correspondingly adjust according to the actual height of the clothes, thereby causing the waste of water resources and the waste of detergent. The washing machine is generally provided with a water level sensor for feeding back the height of the water level, but the water level sensor can only feed back the height of the water level and cannot feed back the height of the clothes.
Because the clothes have different properties, for example, the clothes such as down jackets have larger volume under smaller weight due to more air in the clothes, and may float on the water surface in the process of water inflow, in the prior art, the properties of the clothes are judged only by a program selected by a user, and the washing machine should select different treatment modes from those of ordinary clothes to achieve better treatment effect.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a control method which can simultaneously acquire the height of clothes and the height of water surface through a photoelectric sensor and can select the water level of inlet water according to the height of the clothes, and a washing machine with the method, which can save water and ensure better washing effect.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control method of a washing machine is provided, the washing machine is provided with a photoelectric sensor used 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 to 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 rays.
The washing machine judges the height of clothes and the height of a water level according to the reflection time of light rays, the photoelectric sensor simultaneously emits a plurality of light rays into the inner barrel, and the washing machine calculates the height corresponding to each light ray relative to the bottom of the inner barrel according to the reflection time of the plurality of light rays to form a height data set;
when the height data group contains 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 group as the clothes height;
preferably, when there is a height value close to zero in the height data set, the washing machine excludes the height value close to zero and calculates the average value.
Specifically, when the washing machine does not feed water, the washing machine excludes a height value close to zero in the height data set and takes the average value of the remaining height values as the initial height of the clothes, 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 remaining height values as the real-time height of the clothes.
The washing machine also comprises a weighing device used 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 level of inlet water according to the height of the clothes according to the initial height of the clothes and the weight of the clothes;
when the initial height of the clothes exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water level of inlet water according to the height, and the washing machine selects the water level corresponding to the weight of the clothes to control the inlet water;
when the initial height of the clothes is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the height of the clothes, and the washing machine selects the water level corresponding to the initial height of the clothes to control water inlet.
Furthermore, when the washing machine judges that the clothes are suitable for selecting the water inlet level according to the height of the clothes, the washing machine sets the warning level according to the weight of the clothes, and when the washing machine intakes water according to the height of the clothes and the real-time water level exceeds the warning level, the washing machine controls the water inlet to stop so as to prevent the overflow condition.
In the water inlet process of the washing machine, when the real-time height of the clothes does not exceed the initial height of the clothes, the washing machine acquires the real-time height of the water level, and when the real-time height of the water level exceeds the real-time height of the clothes or exceeds the real-time height of the clothes for a certain distance, the washing machine controls the water inlet to stop.
The clothes may 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 impeller to rotate;
when the real-time clothes height is not higher than the initial clothes height after the impeller rotates, the washing machine controls the water inlet to stop when the water level height exceeds the real-time clothes height or the real-time water level height exceeds the real-time clothes height for a certain distance;
when the real-time clothes height is still higher than the initial clothes height after the impeller rotates, the washing machine controls the water inlet to stop after the real-time clothes height exceeds the initial clothes height by a certain distance.
Selecting a water inlet level according to the height of clothes in a washing process and selecting a water inlet level according to the weight of the clothes/the height of the clothes in a rinsing process by the washing machine;
preferably, the washing machine controls the water supply to stop when the real-time water level height exceeds the real-time clothes height by a certain distance h1 in the washing process, and controls the water supply to stop when the real-time water level height exceeds the real-time clothes height by a certain distance h2 in the rinsing process, wherein h2 > h 1.
In another embodiment, the washing machine judges the source of the reflected light according to the reflectivity of the light, and calculates the height of the clothes/the height of the water level according to the reflection time of the light;
preferably, the washing machine is preset with a first reflectivity interval and a second reflectivity interval, when the reflectivity of the light falls into the first reflectivity interval, the washing machine determines the reflected light from the water surface, and when the reflectivity of the light falls into the second reflectivity interval, the washing machine determines the reflected light 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 in the inner barrel and the height of water level;
preferably, the washing machine has an upward clothes input opening, an upper cover is arranged at the clothes input opening, and a photoelectric sensor is arranged on one side of the upper cover facing the inner barrel.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the washing machine can respectively measure the water level height and the height of clothes by arranging the sensor, so that the 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 inlet water according to the actual height of clothes, so that the water and detergent consumption can be saved while the clothes are submerged to achieve a better washing effect;
(3) the washing machine makes a judgment for the clothes which are not suitable for selecting the water inlet level according to the height of the clothes, so as to prevent the overflow condition.
The following describes 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, 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 without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of a washing machine provided with a photoelectric sensor according to the present invention;
FIGS. 2 to 3 are schematic views of one 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 a washing machine according to the present invention.
In the figure: 1. a washing machine; 11. an upper cover; 12. a photoelectric sensor.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled 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, wherein an opening is formed at a top of the washing tub, the opening of the washing tub and an opening of a tray of the washing machine form a laundry input port, an upper cover 11 is disposed at the laundry input port, and the upper cover of the washing machine is in a closed state during a laundry washing process.
The upper cover 11 of the washing machine is provided with the photoelectric sensor 12, the photoelectric sensor 12 can emit light and receive reflected light, and the distance traveled by the light is calculated according to the time difference between the emitted light and the received light. The photoelectric sensor 12 can emit light into the inner barrel, and the water level height and the height of clothes can be obtained by calculating or judging the reflected light of the photoelectric sensor through the washing machine.
As shown in fig. 1, the photoelectric sensor 12 is disposed on the upper cover 11 of the washing machine to emit light into the inner tub, and thus is disposed on a side of the upper cover facing the inner tub. The photoelectric sensor is preferably arranged in the middle of the upper cover and aligned with the axis of the inner barrel, so that light emitted by the photoelectric sensor can be uniformly distributed in the inner barrel.
The invention also comprises a control method of the washing machine, the photoelectric sensor emits light rays into the inner barrel, the light rays are reflected when reaching the water surface or the surface of clothes, and the reflected light rays are 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 after the distance between the water surface or the surface of clothes and the photoelectric sensor is obtained, the height from the water surface or the surface of the clothes to the inner barrel bottom, namely the height of the water level/the height of the clothes can be obtained.
The judging method for distinguishing whether the reflected light is reflected by the water surface or the surface of the clothes can judge through the reflection time of the light and the reflectivity of the light.
Example one
In the embodiment, the source of the reflected light is determined by the reflection time of the light, as shown in fig. 2.
The principle of the embodiment is that the photoelectric sensor emits a plurality of light beams into the inner barrel at the same time, 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 light beams to form a height data set, and the heights of the water surface at all positions are equal under the condition that the fluctuation of the water surface is not considered, so that the height is the height of the water surface when n light beams correspond to the same height. However, the laundry is generally uneven, and heights corresponding to the light beams reflected after each light beam is irradiated on the laundry may be different, so that when the laundry and water are present in the inner tub, it may be considered that the light beams other than the n light beams are all reflection lines irradiated on the laundry, and after an average value of heights corresponding to the remaining light beams is obtained, it may be considered as the height of the laundry. Generally, when the water level exceeds the height of the clothes, water can be stopped from entering the clothes, so that the water can just submerge the clothes, and the aim of saving water is fulfilled.
Specifically, for example, the photoelectric sensor emits x beams of light into the inner barrel simultaneously, wherein the reflected light of the x beams of light is reflected to the sensor within the time t1, t2 and t3 … … tx. The washing machine can calculate corresponding heights to be H1, H2 and H3 … … Hx according to the reflection times t1, t2 and t3 … … tx, and the heights form a height data set.
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 after the washing machine acquires the height data set, when the H1, the H2 and the H3 … … Hn have only slight difference or are equal, the light rays corresponding to the H1, the H2 and the H3 … … Hn can be considered to be reflected by the water surface, so the water surface height HW is obtained after the H1, the H2 and the H3 … … Hn are averaged.
The light rays corresponding to the other height values Hn +1 … … Hx in the other height data sets may be considered as reflected from the laundry, and Hn +1 … … Hx may be averaged as the laundry height HC.
The distance H between the bottom of the inner barrel and the light sensor is a fixed value, and when the reflection time of the light is t, the distance traveled by reflection is C multiplied by t (C is the speed of light). 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 the time when the light is emitted and the time when the reflected light is received, but the paths traveled by the emitted light and the reflected light are equal and have the same time, so that the reflection time corresponding to the reflected light is half of the time difference.
When no water exists in the inner barrel, the light emitted by the photoelectric sensor can reach the bottom of the inner barrel and then be reflected, the calculated height value is close to zero, and when the height data group has the height value close to zero, 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 also detect the height of clothes when water is not fed. Specifically, when the washing machine does not feed water, the washing machine excludes a height value close to zero in the height data set and takes an average value of remaining height values thereof as an initial laundry height HCi, and during water feeding of the washing machine, the washing machine excludes a plurality of similar height values and takes an average value of remaining height values thereof as a real-time laundry height HCc.
In general, the height of the laundry does not change during the water inlet process, that is, HCc is HCi, but some of the laundry may have a height HCc greater than or less than the initial height HCi during the water inlet process.
For example, when the clothes are down jackets, the height of the clothes has a large value when water is not supplied due to the large amount of air in the down jackets, and the height of the clothes is reduced due to the fact that the water flow hits the clothes during the water supply process to exhaust the air in the clothes; when the clothes are made of lighter materials, the clothes can float on the water surface in the water inlet process, and the height of the clothes is increased along with the increase of the height of the water level in real time.
The fluffy clothes such as the down jacket have smaller weight, but the clothes have larger volume and are placed into the inner barrel to have larger height, so that the water inlet level is not suitable to be selected according to the height of the clothes, otherwise, the water is excessively fed to cause waste of water resources.
Aiming at fluffy clothes, the following method is adopted to judge whether the water level of the inlet water is suitable to be 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 weight of laundry in an inner tub, and the washing machine of the present invention further includes a weighing device for weighing the weight of laundry in the inner tub, and judges whether the laundry is suitable for selecting a water level of intake water according to the height of the laundry by an initial height of the laundry and the weight of the laundry. Specifically, a corresponding preset height interval is preset for a certain clothes weight, and when the initial clothes height exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water level of inlet water according to the height, and then the washing machine selects the water level corresponding to the clothes weight to control the inlet water; when the initial height of the clothes is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the height of the clothes, and the washing machine selects the water level corresponding to the initial height of the clothes to control water inlet.
For the convenience of describing the control process, the parameters involved in the process are assigned, but the numerical values are only used for describing the technical scheme and are not real data in real operation. For example, when the weight of the clothes is 1kg, the preset height interval is 10-20cm, when the weight of the clothes in the inner tub is weighed and the initial height HCi of the clothes is obtained, and the obtained weight of the clothes is 1kg, whether the initial height HCi of the clothes is within the preset height interval is judged, and when the initial height HCi of the clothes is 15cm, the initial height HCi of the clothes is within the preset height interval, the initial height HCi of the clothes is located in the preset height interval, so that the fluffiness degree of the clothes is proved not to be large, and the water level of the inlet water is selected according; when HCi is 25cm, the preset height interval is exceeded, and the fluffiness degree of the clothes is proved to be large, so that the clothes in the inner barrel are not suitable for selecting the water inlet level according to the height of the clothes in order to avoid the situation that the water inlet level is too high.
Further, in order to avoid the occurrence of the overflow accident, when the washing machine determines that the laundry is suitable for selecting the water inlet level according to the height of the laundry, the washing machine may set a warning level according to the weight of the laundry, the warning level being generally a higher level or a highest level, and when the washing machine enters water according to the height of the laundry, the washing machine controls the water inlet to stop when the real-time water level exceeds the warning level.
The method for controlling the water inlet process includes that the washing machine obtains a real-time water level HWc when a real-time laundry height HCc does not exceed an initial laundry height HCi during the water inlet process, and controls the water inlet to stop when a real-time water level HWc exceeds the real-time laundry height HCc or when a real-time water level HWc exceeds the real-time laundry height HCc by a certain distance h 1.
Generally, the washing effect is better when the water in the inner tub of the washing machine can submerge the clothes, but in order to ensure that the clothes have a space which is fully stirred 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 change, for example, the laundry floats in the water, such that the real-time laundry height HCc exceeds the initial laundry height HCi, and at this time, if the water supply is stopped by the method of the real-time water level exceeding the real-time laundry height, it is impossible, 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 possibly caused only by the fact that air in the clothes is not discharged yet can be achieved, the clothes can be rolled or pressed into the water by controlling the rotation of the impeller or spraying the clothes, and the like, 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 water level judgment process can be continued.
After the impeller rotates or the clothes are sprayed, if the real-time clothes height HCc is not higher than the initial clothes height HCi, the clothes are not floated any more, and at the moment, the water can be cut off by comparing the water level height with the clothes height. The control is that the washing machine controls the 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.
After the impeller rotates or sprays the clothes, if the real-time clothes height HCc is still higher than the initial clothes height HCi, the clothes can be considered to be incapable of improving the floating state of the clothes through the rotation of the impeller or the spraying due to the properties of the clothes or other reasons, so that the water inlet of the washing machine is controlled to stop after the real-time clothes height HCc exceeds the initial clothes height HCi for a short distance or a short time, and the water level is prevented from being too high.
In general, the water level of a washing machine is selected to just submerge clothes during washing, so that good mutual friction is achieved, and a good washing effect is achieved.
In the control method of the washing machine, in order to achieve the purpose of saving washing water, the washing machine selects the water inlet level according to the height of clothes in a washing procedure, and the washing machine can select the water inlet level of rinsing water according to the weight of the clothes and can also select the water inlet level of the rinsing water according to the height of the clothes in a rinsing procedure.
When the washing machine selects the water inlet level in the rinsing program, a certain water-saving purpose can be achieved. But the water inflow at the moment is slightly different. The control method can be as follows: when the real-time water level height of the washing machine exceeds the real-time clothes height by a certain distance h1 in a washing program, the washing machine controls water inlet to stop, and when the real-time water level height of the washing machine exceeds the real-time clothes height by a certain distance h2 in a rinsing program, the washing machine controls water inlet to stop, wherein h2 is more than h 1.
Example two
The present embodiment is different from the previous embodiment in that the washing machine determines the source of the reflected light according to the reflectivity of the light, calculates the height of the laundry by the reflection time of the light from the laundry, and calculates the height of the water level by the reflection time of the light from the water surface, as shown in fig. 4.
Due to the fact that the properties of the water surface and the surface of the clothes are different, the reflectivity of the water surface and the surface of the clothes to light is different, the difference of the properties can be used for the photoelectric sensor to judge the source of the reflected light, and therefore the corresponding height can be judged according to the source of the reflected light.
Specifically, the washing machine is preset with a first reflectivity interval and a second reflectivity interval, when the reflectivity of the light falls into the first reflectivity interval, 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 interval, 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 bottom of the inner barrel and the light sensor is a fixed value, and when the reflection time of the light is t, the distance traveled by reflection is C multiplied by t (C is the speed of light). And the height relative to the bottom of the inner barrel can be converted into H-Ct. The photoelectric sensor detects the time difference between the time when the light is emitted and the time when the reflected light is received, but the paths traveled by the emitted light and the reflected light are equal and have the same time, so that the reflection time corresponding to the light is half of the time difference. Correspondingly, when the reflectivity of the light ray falls into the first reflectivity interval, the height is calculated according to the reflection time of the light ray, namely the height of the water surface, and when the reflectivity of the light ray falls into the second reflectivity interval, the height is calculated according to the reflection time of the light ray, namely the height of the clothes.
In the control methods of the washing machine in the two embodiments, the washing machine can respectively measure the water level height and the height of clothes by arranging one sensor, so that the hardware setting is saved by a calculation mode, and the cost of the washing machine is reduced; the washing machine can adjust the water level of inlet water according to the actual height of clothes, so that the water and detergent consumption can be saved while the clothes are submerged to achieve a better washing effect; the washing machine makes a judgment for the clothes which are not suitable for selecting the water inlet level according to the height of the clothes, so as to prevent the overflow condition.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The control method of the 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 a water level in an inner barrel, the washing machine controls the photoelectric sensor to emit light rays to 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 rays.
2. The control method of a washing machine according to claim 1, wherein the washing machine determines the height of the laundry and the height of the water level according to the reflection time of the light, the photoelectric sensor emits a plurality of light beams into the inner tub at the same time, and the washing machine calculates the height of each light beam relative to the bottom of the inner tub according to the reflection time of the plurality of light beams to form a height data set;
when the height data group contains 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 group as the clothes height;
preferably, when there is a height value close to zero in the height data set, the washing machine excludes the height value close to zero and calculates the average value.
3. The control method of a washing machine as claimed in claim 2, wherein the washing machine excludes a height value close to zero in the height data set and takes an average value of remaining height values thereof as an initial height of the laundry when the washing machine does not supply water, and excludes a plurality of similar height values and takes an average value of remaining height values thereof as a real-time height of the laundry during the water supply of the washing machine.
4. The control method of a washing machine as claimed in claim 3, wherein the washing machine further comprises a weighing device for weighing the weight of the laundry in the inner tub, the washing machine judging whether the laundry is suitable for selecting the water level of the inlet water according to the height of the laundry by the initial height of the laundry and the weight of the laundry;
when the initial height of the clothes exceeds the preset height interval, the washing machine judges that the clothes are not suitable for selecting the water level of inlet water according to the height, and the washing machine selects the water level corresponding to the weight of the clothes to control the inlet water; when the initial height of the clothes is within the preset height interval, the washing machine judges that the clothes are suitable for selecting the water inlet level according to the height of the clothes, and the washing machine selects the water level corresponding to the initial height of the clothes to control water inlet.
5. The control method of a washing machine as claimed in claim 4, wherein the washing machine sets a warning level according to the weight of the laundry when the washing machine determines that the laundry is suitable for the selection of the water level of the inlet water according to the height of the laundry, and the washing machine controls the water inlet to be stopped when the real-time water level exceeds the warning level when the washing machine takes in water according to the height of the laundry.
6. The control method of a washing machine as claimed in claim 4, wherein the washing machine acquires the real-time water level height when the real-time laundry height does not exceed the initial laundry height during the water supply, and controls the water supply to be stopped when the real-time water level height exceeds the real-time laundry height or when the real-time water level height exceeds the real-time laundry height by a distance h 1.
7. The control method of a 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 impeller rotates, the washing machine controls the water inlet to stop when the 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 h 1;
when the real-time clothes height is still higher than the initial clothes height after the impeller rotates, the washing machine controls the 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 a water level of the inlet water according to a height of the laundry during a washing process, and selects a water level of the inlet water according to a weight of the laundry/height of the laundry during a rinsing process;
preferably, the washing machine controls the water supply to stop when the real-time water level height exceeds the real-time clothes height by a certain distance h1 in the washing process, and controls the water supply to stop when the real-time water level height exceeds the real-time clothes height by a certain distance h2 in the rinsing process, wherein h2 > h 1.
9. 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 a height of the laundry/a height of the water level through a reflection time of the light;
preferably, the washing machine is preset with a first reflectivity interval and a second reflectivity interval, when the reflectivity of the light falls into the first reflectivity interval, the washing machine determines the reflected light from the water surface, and when the reflectivity of the light falls into the second reflectivity interval, the washing machine determines the reflected light from the clothes.
10. A washing machine having the control method as set forth in any one of claims 1 to 9, wherein the washing machine has a photosensor for detecting a height of laundry and a height of a water level in the inner tub;
preferably, the washing machine has an upward clothes input opening, an upper cover is arranged at the clothes input opening, and a photoelectric sensor is arranged on one side of the upper cover facing the inner barrel.
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