Water inlet control method of clothes treatment equipment and clothes treatment equipment

Abstract

The invention firstly provides the water inlet control method of the clothes processing equipment, the clothes processing equipment comprises a controller and a distance measuring sensor, and after a rinsing program is entered, the controller controls a water inlet valve to feed water into a washing cavity; when the real distance between the load and the distance measuring sensor is larger than or equal to the preset value h standard in the rinsing water inlet process, it is regarded that water inlet meets the rinsing requirement, and water inlet is controlled to be stopped. The invention further provides a laundry treating apparatus. According to the water inlet control method of the clothes treatment equipment and the clothes treatment equipment, in the rinsing water inlet stage, the water consumption does not need to be determined according to the weight of the to-be-cleaned clothes, the data detected by the distance measuring sensor is compared with the preset data, the rinsing water inlet process is accurately controlled, and water and electricity consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing equipment, and in particular, relates to a water inlet control method of a clothing processing equipment and the clothing processing equipment. Background Art

[0002] With the development of cities and the quickening pace of life, washing machines, as a household appliance that can free users' hands and save users' time in handling housework, are accepted and purchased by more and more users.

[0003] In the existing washing machine, after the user selects the washing program, the water intake will be determined according to the weight of the clothes. If the user does not adjust the water intake according to his needs, the controller will determine the water consumption according to the weight of the clothes, and further control the water intake through the liquid level meter, water intake flow rate, water intake time, etc. However, this water intake control method only considers the weight of the clothes, but not the material and water absorption of the clothes, resulting in insufficient water intake when washing clothes with strong water absorption, affecting the washing effect; when the water intake is insufficient, the water intake needs to be adjusted and the water intake needs to be supplemented if the control system allows, and there may be multiple water intake and water replenishment operations, which is time-consuming and labor-intensive, and will extend the washing cycle.

[0004] Moreover, the existing methods are usually applicable to water intake control during the washing stage. If the user only chooses to rinse, the rinsed clothes have absorbed water and their weight is much greater than the weight of dry clothes. If the water intake is determined by weight, the actual water intake is greater than the actual water requirement for rinsing, which not only wastes water, but also increases power consumption. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a water inlet control method for a clothing processing device and a clothing processing device. During the rinsing water inlet stage, there is no need to determine the water consumption based on the weight of the clothes to be washed. The data detected by the ranging sensor is compared with the preset data to accurately control the rinsing water inlet process and reduce water and electricity consumption.

[0006] In order to achieve the first object of the invention, the present invention first provides a water inlet control method for a clothes processing device, and the technical solution adopted is:

[0007] A water inlet control method for a clothes processing device, the clothes processing device comprising a controller and a distance measuring sensor, after entering a rinsing program, the controller controls a water inlet valve to let water into a washing chamber;

[0008] When the actual distance between the load and the distance measuring sensor during the rinsing water inflow process is greater than or equal to the preset value h mark, it is considered that the water inflow meets the rinsing demand, and the water inflow is stopped.

[0009] Furthermore, a correspondence table between the rinsing weight and the preset value h mark is pre-stored in the controller. When water is entering for rinsing, the corresponding preset value h mark is selected from the correspondence table for water inlet control; or when water is entering during the cleaning stage, when the real-time flatness △ of the load surface is less than or equal to the preset flatness threshold, the distance between the load and the distance measuring sensor at this time is obtained and marked as the preset value h mark for water inlet control.

[0010] Furthermore, when water is introduced during the cleaning phase, the variance is calculated periodically according to the load heights at different positions detected by the ranging sensor to obtain the real-time flatness △, and when the real-time flatness △ is less than or equal to the flatness threshold, water introduction is stopped.

[0011] Furthermore, before water is introduced into the washing stage, the impeller is controlled to rotate at a first rate or the washing tub and the impeller are controlled to rotate relative to each other to agitate the clothes. After the clothes are agitated for a predetermined time, the washing tub and / or the impeller are controlled to rotate at a second rate to drive the clothes to rotate while detecting and obtaining the initial flatness △1 of the surface of the clothes. Then, the controller controls the water inlet valve to start letting in water.

[0012] Furthermore, during the water intake process, the water intake is stopped after every n seconds, the washing tub and / or the impeller drives the load to rotate at a third rate, and the real-time flatness △ of the load surface is detected, and the process of letting in water and detecting the real-time flatness △ after stopping the water intake is repeated; or during the water intake process, the washing tub and / or the impeller drives the clothes to rotate at a third rate, the water intake is stopped after n seconds, the washing tub and / or the impeller continues to drive the clothes to rotate at the third rate, and the real-time flatness △ of the load surface is detected; the process of letting in water and detecting the real-time flatness △ is repeated until the detected real-time flatness △ is less than or equal to the flatness threshold, and the water intake and the detection of the real-time flatness △ are stopped.

[0013] Furthermore, when detecting the flatness of the load surface, the washing tub and / or the impeller drives the load to rotate at least one circle at a first rate, forming multiple detection points on the load surface, and calculating the variance between the load heights at each detection point to obtain the load surface flatness.

[0014] Furthermore, when the real-time flatness △ is less than or equal to a*△1 or the real flatness △ is less than or equal to the flatness threshold or the real-time flatness △ is less than or equal to a*△1 and the real flatness △ is less than or equal to the flatness threshold, the water intake is controlled to stop, and a is the control coefficient, which is a positive number.

[0015] Furthermore, when the real-time flatness △ is less than or equal to the flatness threshold, the distance value between the load and the distance measuring sensor at each detection point is recorded, and the average value of all distance values ​​is calculated and recorded as the preset value h mark; or all distance values ​​are sorted, and the maximum value is recorded as the preset value h mark; or the average value of all distance values ​​is calculated and compared with the maximum value of all distance values, and the larger value of the two is taken as the preset value h mark.

[0016] Furthermore, the controller pre-stores any one of an error value that varies with water inlet time, an error curve based on water inlet time, and an error value or error curve corresponding to different laundry amounts that varies with water inlet time to obtain a real-time error value and adjust the measured distance to obtain the actual distance between the load and the distance measuring sensor.

[0017] The second invention object of the present invention is to provide a clothes processing device, which adopts the following technical solution:

[0018] A clothes processing device includes a water inlet control method of the clothes processing device as described above.

[0019] In summary, the water inlet control method of a clothes processing device and the clothes processing device provided by the present invention have the following beneficial effects compared with the prior art:

[0020] 1. No changes are needed to the existing products. Only a distance measuring sensor needs to be added and the control program in the controller needs to be changed to complete the water inlet control method of the present invention.

[0021] 2. Stirring the clothes before water intake can make the top of the clothes as flat as possible and distribute the clothes as evenly as possible to avoid the situation where some clothes are locally high, which will affect the variance calculation results in the later stage and thus affect the water intake control;

[0022] 3. According to the different loads, the water intake is accurately controlled by changing the distance to ensure the washing effect while avoiding the waste of water and electricity;

[0023] 4. When the calculated variance is small, it means that the surface variance of the load (clothing, water surface) is small. When the water intake reaches the washing requirement, the water surface usually overflows the clothing and is relatively stable. In this way, the water intake can be effectively controlled.

[0024] 5. By introducing errors to adjust the measured data during the rinsing water inlet process, the water inlet can be further accurately controlled to improve the rinsing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0026] Figure 1 : A schematic diagram of the working state of a laser ranging sensor in a clothing processing device provided by the present invention;

[0027] Figure 2: A comparison curve diagram of the measured distance and the actual distance during the rinsing water inlet process in a washing machine control method provided by the present invention;

[0028] Among them, there are transmitting unit 1 and receiving unit 2.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0031] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The present invention provides a water inlet control method for a clothes processing device, comprising the following steps:

[0034] The controller receives the instruction and determines the washing program;

[0035] The controller controls the water inlet valve to let water into the washing chamber;

[0036] The real-time flatness △ of the load surface during the water intake process is detected. When the detected real-time flatness △ is less than or equal to the preset value, it is considered that the water intake meets the washing needs, and the water intake is stopped.

[0037] In this embodiment, a pulsator washing machine is taken as an example to introduce the specific structure of the clothing processing device and the water inlet control method provided by the present invention.

[0038] A pulsator washing machine comprises a washing tub and a door body. During the washing process, the door body closes a clothing inlet on the upper portion of the washing tub to prevent washing water from leaking out during the washing process and accidents from occurring during the spin-drying process.

[0039] A distance measuring sensor is also included, which is arranged on the upper part of the washing tub and above the highest water level allowed by the washing machine to accurately detect the distance between the clothes in the washing tub and the distance measuring sensor. In this embodiment, the distance measuring sensor is a laser distance measuring module. Further, the distance measuring sensor is a TOF laser distance measuring module, which has the function of emitting and receiving lasers, including an emitting unit 1 and a receiving unit 2, which can emit lasers with a wavelength of 900nm to 960nm, and it is recommended to emit lasers with a wavelength of 940nm, and emit lasers into the washing tub. The lasers are reflected after reaching the water surface or the surface of the clothes (collectively referred to as the load surface), and the reflected lasers are received by the receiving unit 2. According to the propagation speed of the laser and the propagation time from emission to reception, the height of the load is calculated.

[0040] like Figure 1 As shown, the laser ranging module is arranged above the washing tub. In order to avoid the washing water measured during the washing process from entering the ranging sensor and causing the ranging sensor to malfunction, preferably, the ranging sensor is arranged at the balance ring on the top of the washing tub and / or at the bottom surface of the door body (inner side, facing the washing tub), etc., and can emit laser into the washing tub, and make the laser fall on the water surface and clothes inside the washing tub and be reflected and received by the reflection unit 2, so as to effectively realize distance detection.

[0041] Taking the laser ranging module set on the bottom surface of the door body as an example, the laser ranging module is fixed on the bottom surface of the door body by gluing or any other means. In order to prevent the washing water from reaching the laser ranging module during the washing process, causing the laser ranging module to become water infiltrated and fail, silicone is poured at the laser ranging module, and the laser ranging module is fixed to the door body by the silicone, protecting the laser ranging module from being immersed in the measured washing water.

[0042] The transmitting unit 1 and the receiving unit 2 are arranged at intervals, and transmitting holes are set at the transmitting unit 1 and the receiving unit 2. Both transmitting holes are tapered holes. The difference lies in the size and the angle of the tapered hole. The top diameter (silicone top surface) of the transmitting hole corresponding to the transmitting unit 1 is between 0.3 cm and 0.5 cm, preferably, the diameter is 0.4 cm, and the tapered hole angle is between 25° and 45°, preferably, the tapered hole angle is 35°; the top diameter of the transmitting hole corresponding to the receiving unit 2 is between 0.15 cm and 0.3 cm, preferably, the diameter is 0.2 cm, and the tapered hole angle is within the range of 15° to 35°, preferably, the tapered hole angle is 25°. The diameter of the transmitting hole and the cone hole of the receiving unit 2 are smaller than the relative data of the transmitting unit 1, which can prevent the receiving unit 2 from receiving too many invalid laser signals of multiple diffuse reflections. The invalid laser signals include but are not limited to the transmitted laser being reflected by the load and then part of the diffusely reflected laser being reflected again by the clothes or the side wall of the washing tub and then received by the receiving unit. This part of the invalid laser signal increases the propagation time, the measured distance is greater than the real distance, and the distance measurement fails. It also includes the lighting lamp 4 emitting illumination light with the same wavelength. The transmitting hole is set as a cone hole, the silica gel has a certain thickness, and the large diameter end of the cone hole faces the water surface. After the water droplets splashed during the washing process enter the cone hole, the path becomes narrower. Under the dual effects of gravity and surface tension, the water droplets cannot completely enter the cone hole and contact the transmitting unit 1 or the receiving unit 2, which does not affect the laser emission and reception effect.

[0043] The distance sensor is electrically connected or signal connected to the controller of the washing machine, and the controller controls the working state and working mode of the two components respectively. Further, the distance sensor is connected to the controller through I2C communication, and the controller sends control instructions to the distance sensor through I2C communication and receives real-time measurement data information sent by the distance sensor.

[0044] Furthermore, the laser distance measurement module is connected to the water inlet control module via a communication protocol, such as an I2C communication protocol, which makes communication simpler, more extensible, and can achieve synchronous communication. The water inlet control module is connected to the controller of the washing machine via a washing machine bus communication or integrated with the controller.

[0045] The laser ranging module detects the distance between the load (including but not limited to clothes before water enters, the wet surface of clothes when water enters but the clothes are not completely immersed, and the water surface after the clothes are immersed, the same below) and the laser ranging module, and sends the detected real-time data to the water inlet control module (when the water inlet control module is integrated with the controller, it can be directly sent to the controller, hereinafter referred to as the controller), and the controller calculates the height of the load and further calculates the flatness of the load surface. According to the relationship between the flatness obtained during the water inlet process and the preset value, the water inlet is controlled. Specifically, when the flatness is small, it means that the water has overflowed the clothes, and the water surface is detected. The water inlet can meet the washing needs, and the water inlet is controlled to stop.

[0046] The data sent by the laser ranging module include but are not limited to the laser emission time, receiving time, and converted real-time distance data. When the laser ranging module only has the emission and receiving functions, the laser ranging module emits the laser at a fixed time according to the instructions of the water inlet control module or the controller, and receives the reflected laser, and sends the emission time and receiving time to the water inlet control module. The water inlet control module calculates the distance between the laser ranging module and the load based on the laser propagation speed and wavelength of the pre-stored laser ranging module to obtain the height of the load, and sends the calculated distance value or the height of the load to the water inlet control module or the controller.

[0047] In order to achieve accurate control of water inlet, the present invention further provides a water inlet control method for a pulsator washing machine, which can achieve accurate water inlet control without the need to set a camera or an image acquisition device, or pre-set the water consumption according to the weight of the clothes. The control method includes the following two embodiments:

[0048] Embodiment 1

[0049] The water inlet control method provided in this embodiment includes the following steps:

[0050] S1, put in clothes, select washing program and start, the controller receives the command and determines the washing program.

[0051] According to the rated washing capacity of the pulsator washing machine, the user puts the clothes to be washed whose weight is less than or equal to the rated washing capacity into the washing tub of the washing machine and selects a washing program. In this embodiment, the washing program includes but is not limited to the entire washing process, any washing link in the washing and rinsing process that requires controlling the water intake, and the washing program is started by a predetermined program or by pressing a start button.

[0052] The controller has a pre-stored automatic water inlet control program. There is no need to select the amount of water according to the weight of the clothes. Instead, the water inlet is automatically controlled. During the water inlet process, the water inlet process and the final water inlet amount are controlled according to the flatness of the load surface detected during the water inlet process.

[0053] S2, the controller controls the water inlet valve to let water into the washing chamber.

[0054] In this embodiment, this step includes:

[0055] S21, obtain the initial flatness △1 of the load surface:

[0056] After the washing program is selected and started, the controller controls the pulsator and the washing tub to move relative to each other, wherein the rotation speeds of the pulsator and the washing tub are both at a first rate, or the pulsator rotates at the first rate and the washing tub rotates at a rate less than the first rate; or only the pulsator is controlled to rotate at the first rate. The rotation of the pulsator and the washing tub stirs the clothes in the washing tub to make a small turn.

[0057] During the process of the pulsator stirring the clothes to turn over, the rotation speed of the pulsator is controlled to be a first rate, which is lower than the rotation speed of the pulsator or the washing tub during the spin-drying process.

[0058] Furthermore, the principle for determining the first rate is: in the process of driving the clothes to rotate, basically no centrifugal force is generated or the centrifugal force generated is relatively small, and the clothes will not move toward the wall of the washing tub under the action of centrifugal force and stick to the wall of the washing tub, resulting in a situation where the height of the clothes in the center is low or even no clothes, and the clothes are close to or piled up on the wall of the washing tub, that is, the clothes at the edge are high; at the first rate, the impeller can stir the clothes and turn them slightly, and spread them out as much as possible at the bottom of the washing tub, and the top surface of the piled clothes is relatively flat, to avoid the clothes being stacked and supported on each other after being thrown in at random, and the local position of the clothes being high when the clothes are thicker and harder, which affects the measurement of the initial distance between the clothes and the laser ranging module when no water is infiltrated, thereby affecting the subsequent precise control of water inlet.

[0059] After the pulsator rotates or the pulsator and the washing tub rotate relative to each other for a predetermined time to turn the clothes over, it is considered that the situation where the piled clothes are locally too high has been eliminated and the top surface of the clothes has become basically flat. The pulsator is controlled to rotate continuously at a second speed and drive the clothes to rotate synchronously. At this time, the laser ranging module detects the height of the clothes at the bottom of the washing tub.

[0060] The principle for determining the second rate is: basically no centrifugal force is generated during the rotation process or the centrifugal force generated will not cause the clothes to be washed to rotate centripetally and stick to the inner wall of the washing tub, and the second rate is ≤ the first rate; further, at the second rate, the impeller drives the clothes to rotate but does not stir the clothes to continue turning over, thereby avoiding changes in the flatness of the top surface of the clothes during the measurement process and affecting the measurement results.

[0061] During the detection process, the impeller drives the clothes to rotate at least one circle. During the rotation process, the distance sensor operates multiple times to obtain detection data at multiple different positions (detection points). In order to obtain a representation of the flatness of the top surface of the clothes in the washing tub, it is recommended that the laser distance measurement module is set on the bottom surface of the door body. Preferably, the laser beam emitted by the laser distance measurement module is projected at 1 / 3 to 2 / 3 of any radius of the bottom of the washing tub. The best is the point where the water inlet device falls into the washing tub when water is introduced into the washing tub. In this way, when the real-time flatness is subsequently detected, the surface of the wet clothes can be directly detected, making the detection result more real and accurate.

[0062] The impeller drives the clothes to rotate at least one circle, and the distance sensor operates at a fixed time according to a predetermined program. The detection points formed on the washing tub form a circle, and the detection points are evenly distributed on the circumference.

[0063] There are multiple laser distance measurement modules, or the laser distance measurement module includes multiple transmitting units 1 and receiving units 2, which are evenly distributed on the bottom surface of the door body. The laser beam emitted by each transmitting unit 1 is projected on the bottom of the washing tub, so as to detect the height of the load at multiple points. The impeller drives the clothes to rotate at least one circle, and multiple detection points form multiple circles, so as to more comprehensively detect the overall height of the load.

[0064] Since the clothes will slightly turn over during the detection process, the height of the clothes at the same detection point may change after one rotation. Preferably, in this embodiment, the impeller drives the clothes to rotate three times during the detection process to obtain sufficient measurement data. In actual applications, the number of times the impeller drives the clothes to rotate can be set as needed, at least one rotation.

[0065] By controlling the second rate and the action interval time of the distance measuring sensor, when the impeller drives the clothes to rotate for multiple cycles, the detection points in each cycle of detection do not overlap, thereby further increasing the detection data and avoiding repeated detection.

[0066] In the present invention, the flatness of the load surface is represented by the variance calculated from all the test data. The height of the load is calculated using all the test data obtained, and the height of the load at each test point is subjected to variance calculation to obtain the flatness of the load surface described in the present invention, which is recorded as the initial flatness △1. The calculation of the variance is a conventional method, and no requirements or restrictions are imposed, and it is not described in detail in this embodiment.

[0067] Furthermore, the initial flatness △1 can be calculated every time the impeller drives the clothes to rotate one circle. After the impeller drives the clothes to rotate three circles, the weighted average of the three initial flatness △1 obtained is taken as the final initial flatness △1 calculated this time.

[0068] S22, after obtaining the initial flatness △1, the controller controls the water inlet valve to open, preparing to let water into the washing tub.

[0069] S3, detecting the real-time flatness △ of the load surface during water inflow. When the detected real-time flatness △ is less than or equal to a preset value, it is considered that the water inflow meets the washing needs, and the water inflow is stopped.

[0070] The controller and / or the water inlet control module (hereinafter referred to as the controller) is provided with a flatness threshold △2, i.e., a preset value. During the water inlet process, the distance sensor detects the distance between the load surface and the distance sensor, thereby obtaining the load height, and as described above, obtains the variance of the load height at all detection points, i.e., the surface flatness of the present invention, and compares the obtained real-time flatness △ with the preset flatness threshold to control the water inlet. Specifically, the following steps are included:

[0071] S31, the controller controls the water inlet valve to let water in.

[0072] When the actual initial flatness △1 is obtained in step S2, the controller controls the impeller to drive the clothes to rotate at the second rate. After obtaining the actual initial flatness △1, the controller controls the water inlet valve to open and start water intake, and at the same time controls the speed of the impeller to the third rate. During the water intake process, the impeller is controlled to continue to drive the clothes to rotate at the third rate, so that the clothes in the washing tub are wetted relatively evenly.

[0073] The principle for determining the third speed is: during the rotation process, basically no centrifugal force is generated or the centrifugal force generated will not make the clothes rotate centripetally and stick to the inner wall of the washing tub. Furthermore, at the third speed, the impeller drives the clothes to rotate, but does not stir the clothes to continue to flip, so as to avoid changes in the flatness of the top surface of the clothes and affect the measurement results. And the third speed ≤ the first speed, or the third speed ≤ the second speed. To simplify the procedure, the first speed, the second speed, and the third speed can also be equal, or the second speed and the third speed are equal but less than or equal to the first speed.

[0074] The impeller drives the clothes to rotate. As the water intake time continues, the clothes in the washing tub will drop and then rise in different areas (before and after water intake). In order to avoid excessive flatness of the load surface due to the difference in water intake time, that is, excessive variance, in this embodiment, within n seconds of water intake, the impeller only drives the clothes to rotate, so that different positions of the clothes to be washed are respectively soaked, but the ranging sensor does not work.

[0075] During the n seconds of water intake, the impeller drives the clothes to rotate at least one circle, and the water drop points form a circle in the washing tub, so that the clothes in the washing tub receive the same amount of water and are evenly soaked. Without considering the different water absorption rates of the materials of the clothes to be washed, in theory, the height change of the load surface in the washing tub should be consistent.

[0076] S32, obtain real-time flatness △:

[0077] In this embodiment, after water enters for n seconds, the controller stops water entry, and the impeller drives the clothes to continue rotating at the third rate. At the same time, the distance sensor operates according to a predetermined program to detect and obtain the load height, and then calculates the variance of the load height, that is, the real-time flatness △. The specific detection and calculation methods are the same as those for obtaining the initial flatness △1, except that the rotation speed of the impeller is different.

[0078] When detecting the real-time flatness △, the controller controls the water inlet valve to stop the water inlet, but controls the impeller to continue to drive the clothes to rotate at the third rate to obtain detection data of multiple load heights, and calculates the obtained data to obtain the real-time flatness △.

[0079] When calculating the real-time flatness △, the impeller is controlled to drive the clothes to rotate at least one time. In this embodiment, the impeller drives the clothes to rotate three times. During the rotation, the distance sensor detects the load height according to a predetermined program. After three rotations, all the obtained data are subjected to variance calculation to obtain the real-time flatness △. Furthermore, the real-time flatness △ can be calculated once after the impeller drives the clothes to rotate one time. After the impeller drives the clothes to rotate three times, the weighted average of the three real-time flatness △ obtained is taken as the final real-time flatness △ calculated this time.

[0080] S33, compare the obtained real-time flatness △ with the preset value, that is, the flatness threshold △2 pre-stored in the controller. When the real-time flatness △ is less than or equal to the preset value, that is, the real-time flatness is less than or equal to the flatness threshold △2, it is determined that the water intake meets the washing needs, and the water intake is stopped; if the real-time flatness △ is greater than the preset value, it is determined that the water intake does not meet the washing needs, and water intake needs to continue, and steps S311 and S312 are repeated until the real-time flatness meets the requirements.

[0081] It should be noted that as water continues to flow in, the clothes are soaked, the mixture of clothes and water will tend to be flat, the water surface rises, and the variance gradually decreases until the water completely covers the clothes. Without considering the special situation that the clothes are too light and float on the water surface, the horizontal plane is flat, and the distance value of the light reflected back from each point on the horizontal plane is equal, that is, the height of each point detected is basically the same, and the variance (flatness) calculated by the detection data reaches the minimum and approaches zero. However, since the water inflow has an impact on the water surface in the washing tub during the water inflow process, the variance will not be zero. Therefore, based on a large number of experimental results, the data of the load surface flatness after meeting the washing requirements is selected, and the flatness threshold △2 is set. The real-time flatness △ detected in real time is compared with the flatness threshold △2 to determine whether the water inflow meets the washing requirements.

[0082] In this embodiment, the flatness threshold △2=a*△1, a is a control coefficient, a positive number. The control coefficient a can be preset as a fixed value, and can be set within the range of 0.1 to 0.3. For example, a=0.2 can be set, that is, a=1 / 5. When the real-time flatness △2 obtained in step S32 is ≤1 / 5*△1, it is determined that the water inflow can meet the washing needs, and the water inflow is controlled to stop.

[0083] The control coefficient a can also be adjusted according to the weight of the clothes to be washed. The heavier the clothes to be washed, the larger the control coefficient a. A correspondence table between the weight range of the clothes to be washed and the control coefficient a is pre-stored in the controller. After the clothes to be washed are put into the washing tub, the washing tub obtains the weight of the clothes in a conventional manner, thereby determining the control coefficient a required for this washing.

[0084] When the detected real-time flatness △ is less than or equal to the preset flatness threshold △2, the water supply is stopped and the washing program starts.

[0085] Embodiment 2:

[0086] The water inlet control method provided in this embodiment is basically the same as that in the first embodiment, except that the initial flatness △ is not obtained in step S. Specifically:

[0087] S1, the controller receives an instruction to determine a washing program.

[0088] According to the rated washing capacity of the pulsator washing machine, the user puts the clothes to be washed whose weight is less than or equal to the rated washing capacity into the washing tub of the washing machine and selects a washing program. In this embodiment, the washing program includes but is not limited to the entire washing process, any washing link in the washing and rinsing process that requires controlling the water intake, and the washing program is started by a predetermined program or by pressing a start button.

[0089] The controller has a pre-stored automatic water inlet control program. There is no need to select the amount of water according to the weight of the clothes. Instead, the water inlet is automatically controlled. During the water inlet process, the water inlet process and the final water inlet amount are controlled according to the flatness of the load surface detected during the water inlet process.

[0090] S2, the controller controls the water inlet valve to let water into the washing chamber.

[0091] In this embodiment, this step includes:

[0092] S21, adjusting the flatness of the surface of the laundry to be cleaned:

[0093] After the washing program is selected and started, the controller controls the pulsator and the washing tub to move relative to each other, wherein the rotation speeds of the pulsator and the washing tub are both at a first rate, or the pulsator rotates at the first rate and the washing tub rotates at a rate less than the first rate; or only the pulsator is controlled to rotate at the first rate and the washing tub does not move. Through this rotation method, the clothes in the washing tub are stirred to turn over slightly.

[0094] During the process of the impeller stirring the clothes to turn over, the impeller is controlled to rotate at a first rate, which is less than the rotation rate of the impeller or the washing tub during the spin drying process. Furthermore, the first rate is determined according to the principle that in the process of driving the clothes to rotate, basically no centrifugal force is generated or the centrifugal force generated is relatively small, and the clothes will not move toward the wall of the washing tub under the action of centrifugal force and thus stick to the wall of the washing tub, resulting in a low height of the clothes in the center or even no clothes, and the clothes stick to or pile up on the wall of the washing tub; but at the first rate, the impeller can stir the clothes to turn over slightly, spread out as much as possible at the bottom of the washing tub, and the top surface of the piled clothes is relatively flat, so as to avoid the clothes from being piled up and supported on each other after being thrown in at random, and the clothes being high in some places when the clothes are thicker and harder, which affects the determination of the initial distance between the clothes and the laser ranging module when no water enters, thereby affecting the subsequent precise control of water inflow.

[0095] After the pulsator rotates or the pulsator and the washing tub rotate relative to each other for a predetermined time, it is considered that the situation where the accumulated clothes are locally too high has been eliminated and the top surface of the clothes has become basically flat.

[0096] S22, after the top surface of the clothes is basically flat, the controller controls the water inlet valve to open and prepare to let water into the washing tub.

[0097] S3, detecting the real-time flatness △ of the load surface during water inflow. When the detected real-time flatness △ is less than or equal to a preset value, it is considered that the water inflow meets the washing needs, and the water inflow is stopped.

[0098] The laser ranging module is arranged on the bottom surface of the door body. Preferably, the laser beam emitted by the laser ranging module is projected at 1 / 3 to 2 / 3 of any radius of the bottom of the washing tub, corresponding to the point where the water inlet device fills the washing tub with water, so that the surface of the soaked clothes can be directly detected when the real-time flatness is subsequently detected, making the detection result more real and accurate. Or the laser ranging module includes a plurality of transmitting units 1 and receiving units 2, which are evenly distributed on the bottom surface of the door body, and the laser beam emitted by each transmitting unit 1 is projected on the bottom of the washing tub, thereby detecting the height of the load.

[0099] Furthermore, the laser ranging module may include multiple groups of transmitting units 1 and receiving units 2, each group of transmitting units 1 and receiving units 2 are evenly arranged on the door body, and the laser light beams emitted by each group of transmitting units 1 can be connected into a radius of the washing tub at the bottom of the washing tub, or can be connected into multiple parallel straight lines, and the distances between each detection point and the center point of the washing tub are different, or can be connected into multiple non-overlapping radii, and the distances between each detection point and the center point of the washing tub are different.

[0100] The controller and / or the water inlet control module is provided with a flatness threshold △2, i.e., a preset value. During the water inlet process, the distance sensor detects the distance between the load surface and the distance sensor, thereby obtaining the load height, and as described above, obtaining the variance of the load height at all detection points, i.e., the surface flatness described in the present invention. Specifically, the following steps are included:

[0101] S31, the controller controls the water inlet valve to let water in.

[0102] The specific control method is the same as that in the first embodiment and will not be described in detail.

[0103] S32, obtain real-time flatness △:

[0104] The specific control method is the same as that in the first embodiment and will not be described in detail.

[0105] S33, compare the obtained real-time flatness △ with the preset value, that is, the flatness threshold △2 pre-stored in the controller. When the real-time flatness △ is less than or equal to the preset value, that is, the real-time flatness is less than or equal to the flatness threshold △2, it is determined that the water intake meets the washing needs, and the water intake is stopped; if the real-time flatness △ is greater than the preset value, it is determined that the water intake does not meet the washing needs, and water intake needs to continue, and steps S311 and S312 are repeated until the real-time flatness meets the requirements.

[0106] It should be noted that as water continues to flow in, the clothes are soaked, the mixture of clothes and water will tend to be flat, the water surface rises, and the variance gradually decreases until the water completely covers the clothes. Without considering the special situation that the clothes are too light and float on the water surface, the horizontal plane is flat, and the distance value of the light reflected back from each point on the horizontal plane is equal, that is, the height of each point detected is basically the same, and the variance (flatness) calculated by the detection data reaches the minimum and approaches zero. However, since the water inflow has an impact on the water surface in the washing tub during the water inflow process, the variance will not be zero. Therefore, based on a large number of experimental results, the data of the load surface flatness after meeting the washing requirements is selected, and the flatness threshold △2 is set. The real-time flatness △ detected in real time is compared with the flatness threshold △2 to determine whether the water inflow meets the washing requirements.

[0107] In this embodiment, the flatness threshold △2 is a fixed value, and this fixed value is related to the weight of the clothes. Different weights of clothes have different flatness thresholds △2. A corresponding table of clothing weight intervals and flatness thresholds △2 is preset in the controller. After the clothes to be washed are put into the washing tub, the washing tub obtains the weight of the clothes in a conventional manner, thereby determining the flatness threshold △2 required for this washing.

[0108] When the detected real-time flatness △ is less than or equal to the preset flatness threshold △2, the water supply is stopped and the washing program starts.

[0109] Embodiment 3

[0110] The control method of embodiment 1 or embodiment 2 is adopted, with the difference that a sprayer is provided at the end of the water inlet valve to evenly spray washing water into the washing tub. In step S31, when water is introduced into the washing tub, there is no need to control the impeller to drive the clothes to rotate at the third speed to achieve uniform water absorption and comprehensive immersion of the clothes. This method can reduce power consumption and increase the life of the motor.

[0111] After n seconds of water intake, stop water intake, as described in Example 1 or Example 2, enter step S32, control the impeller to drive the clothes to rotate at a third rate, and calculate the load height and real-time flatness △, and finally enter step S33 to achieve precise control of water intake.

[0112] It should be noted that the water inlet control method described above is applicable to the initial water inlet process of the washing program. In this case, the load is placed into the washing drum by the user and is relatively evenly distributed at the bottom of the washing drum. The load can be further evenly distributed by rotating the washing drum before water inlet. During the water inlet process, the water impacts the clothes and is absorbed by the clothes. The ranging sensor always detects the distance between the relatively stable surface of the clothes and it, and calculates the flatness.

[0113] After the washing is finished, the load is spun dry and dehydrated and then enters the rinsing process. Under the action of centrifugal force during the drying process, after the drying is finished, the load is close to the wall of the washing tub, and a blank area appears at the bottom of the washing tub. At this time, water enters and directly impacts the bottom of the washing tub. The distance sensor detects the distance between the shaking water surface and the water surface. The measured data is inaccurate due to the shaking water surface, and the shaking water surface may cause diffuse reflection of the laser, further making the measurement data inaccurate. Therefore, the water inlet control method provided by the present invention is more suitable for water inlet during the washing stage, but not for rinsing water inlet after washing, which will cause the rinsing water inlet to fail or be insufficient, resulting in inadequate rinsing and affecting the rinsing effect.

[0114] In this regard, the present invention further provides a method for accurately controlling water inlet for a rinsing procedure after washing and drying or for a user to select a separate rinsing procedure (when rinsing separately, there will also be a drying procedure before water intake).

[0115] The water inlet control in the washing stage before rinsing can adopt the conventional control method in the prior art, or the water inlet control method as described above. When the method described above is used to control the water inlet process in the washing stage, as described above, when the real-time flatness is less than or equal to the preset flatness threshold, the water inlet meets the washing requirements, and the distance between the ranging sensor and the load at this time is obtained, and recorded as the preset value h mark, which is used to control the subsequent rinsing water inlet. When the water inlet reaches the distance between the load and the laser ranging module less than the preset value h mark during the rinsing process, the rinsing water inlet is basically the same as the washing water inlet, and the water inlet is deemed to meet the rinsing requirements, the water inlet is stopped, and the rinsing program is reduced.

[0116] As in the two embodiments described above, each time the real-time flatness Δ is obtained, multiple load heights will be obtained. When the real-time flatness Δ is less than or equal to the preset flatness threshold Δ2, the distance between the load and the distance sensor corresponding to all load heights participating in the flatness calculation is obtained, and all distance values ​​are averaged and marked as the preset value h mark; or all distance values ​​are sorted, and the maximum value is used as the preset value h mark to control the rinsing water inlet, so that the rinsing water inlet is slightly larger than the water inlet in the washing stage, thereby improving the rinsing effect; or the average value is compared with the maximum value, and the larger value is taken as the set value h mark. In practical applications, the specific method for obtaining h mark is determined according to the specific rinsing requirements.

[0117] It should be noted that the various distance values ​​obtained by the distance measuring sensor involved in the rinsing water inlet process are obtained in the same method as the method for obtaining the real-time flatness Δ described above. The difference is that the two embodiments above use the obtained multiple data to perform variance calculation to obtain the flatness Δ, while in the rinsing water inlet stage, the obtained multiple data are used to obtain any one of the average value, maximum value, and comparison data of the average value and the maximum value as the distance value required for the rinsing water inlet control. All the distances involved in the rinsing water inlet control process are obtained in the same way and will not be repeated.

[0118] During the rinsing water inlet process, the laser ranging module detects the load height, that is, the distance between the load and the laser ranging module. Before water inlet, the distance between the bottom of the washing tub and the laser ranging module is detected. Since there is a blank area in the center of the washing tub, the detection range of the laser ranging module is basically within the blank area. As water inlet continues, the distance between the water surface and the laser ranging module will be detected. When the distance between the water surface and the laser ranging module and the water level (load) height reach the distance from the load to the laser ranging module and the load height determined during the cleaning water inlet recorded by the controller, the water inlet is deemed to be consistent with the water inlet volume in the cleaning program, the water inlet demand is met, the water inlet is stopped, and the rinsing process is started.

[0119] Furthermore, during the rinsing water inlet process, the ranging sensor operates synchronously, and adopts the same method as the two previous embodiments to obtain the real-time variance Δ to obtain the distance between the load of each detection point and the ranging sensor, and the obtained real-time distance values ​​are averaged or sorted to obtain the maximum value. When the distance average value or maximum value is greater than or equal to the preset value h mark, it is considered that the water inlet has met the rinsing requirements, the water inlet is stopped, and the rinsing program is entered.

[0120] Alternatively, the average value and the maximum value of the distance are compared. When the larger of the two is greater than or equal to the preset value h mark, the water supply is stopped and the rinsing program is entered. The larger of the two is used as the basis for judgment to avoid excessive water intake, which increases the burden on the power system of the washing machine and, in severe cases, causes overflow.

[0121] Through intermittent water inflow test, we observed and recorded the measured data and the real data, and found that due to factors such as water surface reflection and shaking, there is a certain error between the measured data and the actual real data. Figure 2 This is the data curve between the measured distance and the real distance during the rinsing water inlet stage and the drainage stage. There will be a certain difference between the measured distance between the load (water surface) and the laser ranging module and the real distance, that is, the error. As the water inlet time continues, the distance between the load and the laser ranging module changes, and the error also varies:

[0122] Before water enters, the distance between the bottom of the washing tub and the laser ranging module is detected, which is the maximum value. As water continues to enter, the distance value gradually decreases;

[0123] When water enters the washing tub for the first time, the water directly hits the bottom of the washing tub, splashing water and causing severe shaking of the water surface. The detection point of the laser ranging module is close to the point where the water enters the washing tub. At this time, the distance between the water surface and the laser ranging module measured is greater than the actual height, and the measured distance is greater than the actual distance. At this time, the error is positive.

[0124] As the water continues to flow in, the load begins to absorb water and slides toward the center of the washing tub under the action of gravity. Under the action of the load, the impact force generated at the water drop point decreases, the swaying of the water surface decreases, and although the measured distance is still greater than the true distance, the difference between the two, i.e. the error, decreases.

[0125] When a certain amount of water is reached, Figure 2 As shown, in this embodiment, when the distance between the load and the laser ranging module reaches the interval of (500, 550), the bottom load absorbs water and slides toward the bottom of the barrel to cover the bottom of the washing tub. In this process, the water entering is absorbed by the load. At this time, the distance between the load and the laser ranging module is detected, and the measured distance is equal to the real distance.

[0126] As water ingress continues, the water-absorbed load increases and the weight increases, and the distance between the load and the laser ranging module decreases. At this time, part of the load floats, generating a false height, the measured distance is less than the true distance, and the error is negative.

[0127] During the experiment, the measured distance and the real distance at different water inlet time points were recorded respectively. After each measured distance was obtained, the water was stopped, and the real distance was measured after the water surface was stable. The measured distance and the real distance at the corresponding time points were recorded respectively. The same method was used to obtain multiple corresponding measured distances and real distances during the drainage process. Multiple data were connected separately to obtain the following: Figure 2 The time-based distance variation curve during the water inflow and outflow process is shown.

[0128] During the experiment, as the water inflow time continues, the accuracy data can be set to record the real distance and the measured distance data of the laser ranging module at every set accuracy distance. For example, during the experiment, the measured distance and the corresponding actual value of the laser ranging module are recorded every 10mm (the set accuracy is 10mm, and this value can be changed according to the accuracy requirement). For example: when the distance value measured by the ranging module is 300mm, stop letting in water, wait for the water surface to balance, obtain the actual distance, record the measured distance value h300 to correspond to the actual distance; when the measured distance value is 310mm, record the actual distance value h310 and the corresponding real distance; when the measured distance value is 320mm, record the actual distance value h320 and the corresponding real distance... and so on. Figure 2 The graph shown.

[0129] In actual applications, before the washing machine leaves the factory, within the rated washing capacity range, experiments are conducted on the water inflow conditions at different water inflow stages during the rinsing stage for different actual washing capacities, as described above, to obtain the error value between the measured distance and the actual distance that changes with the water inflow time for different washing capacities, and solidify it into the control process according to the preset principles, so as to control the water inflow during the rinsing stage.

[0130] If the user only selects a separate rinsing program, during this rinsing process, the controller does not record the preset value h mark of the washing water inlet stage. The actual distance obtained during the rinsing water inlet process cannot be compared with the preset value h mark to control the rinsing water inlet. To solve this problem, the rinsing water inlet control process also includes an adaptive program to record the preset value h mark corresponding to different laundry amounts of the user in the entire washing process within the cycle. Taking into account the different water absorption rates of clothes, the weight of the rinsed clothes with the same dry weight after being soaked in water and then spun dry is different. The controller records the weight of the rinsed clothes corresponding to different laundry amounts to form a correspondence table between the weight of the rinsed clothes and the preset value h mark. When the user chooses to rinse alone, the corresponding preset value h mark is selected in the corresponding table based on the weight of the rinsed clothes obtained before the water inlet, and this is used as the standard value to control the rinsing water inlet.

[0131] Furthermore, the controller has a statistical function, which forms a weight interval for multiple rinsed laundry weights corresponding to the same preset value h mark, and regularly updates the interval range. For example, every 10 times the full cleaning process is used, the rinsed laundry weight interval in the corresponding table is updated according to the recorded data, or every three months (or other predetermined time), the rinsed laundry weight interval in the corresponding table is updated according to the recorded data.

[0132] The preset time can be a fixed value or can be set according to the user's laundry habits. Each preset time forms a cycle, and the controller records the cleaning data within the cycle to adjust the preset value h standard accordingly.

[0133] When the weight interval of the rinsed clothes is not set, if the corresponding preset value h mark is not found for the weight of the clothes to be rinsed this time, the current rinse weight will be compared with all the data recorded in the controller, and the difference between the historical rinse weight and the current rinse weight will be sorted. The preset value h mark corresponding to the historical rinse weight corresponding to the data with the smallest difference will be used as the standard value for this rinse operation. During the water intake process, this will be used as a benchmark to control the rinsing water intake process.

[0134] When the same weight of rinsed clothes corresponds to multiple preset values ​​h in the recorded data, the maximum preset value h is used as the standard value of the rinse water inlet for this time to control the rinse water inlet to avoid insufficient water inlet and incomplete rinsing.

[0135] Taking into account that during a period of water intake, that is, during the time when the measured distance is equal to the actual distance, the water intake is far from meeting the rinsing requirement, and after that, the measured distance and the actual distance basically change linearly, and the difference between the two, that is, the error, changes very little after a period of time, and basically maintains a constant value and does not change with the water intake time. Therefore, the error data obtained from the experiment can be fitted into a constant value and solidified into the controller. After the preset rinsing water intake time t, laser ranging is performed again, and the real distance is obtained through real distance = measured distance + error. When the real distance (the distance between the load and the laser ranging module) is equal to the preset value h mark determined during the water intake process, the water intake is stopped.

[0136] Furthermore, the error data fitted into a constant value can be used to make a correspondence table between the weight of the clothes and the error value according to the weight of the clothes. In the rinsing program after the washing program, the error value is obtained from the correspondence table according to the weight of the clothes obtained during the washing program, which is used to obtain the actual distance during the rinsing water inlet process to control the rinsing water inlet.

[0137] The predetermined time t can be determined according to the water inflow time t1 when the measured distance obtained in the experiment is equal to the actual distance, and the predetermined time t is greater than or equal to the water inflow time t1; further, if Figure 2As shown in the figure, within t2 time after the measured distance is equal to the real distance, the error changes linearly, not a constant value. After t2 time, the error becomes a constant value until t3 time, when the water inflow meets the rinsing demand. Therefore, t1≤t≤t2, or t1≤t<t3, or t2≤t<t3 can be set. After the predetermined time t, the distance between the load and the laser ranging module is detected again to control the rinsing water inflow.

[0138] After a predetermined time t, the distance between the load and the laser distance measuring module is detected as described above, and the error is adjusted to obtain the real distance, and the rinsing water inlet is controlled accordingly;

[0139] Furthermore, through the data obtained from the experiment, the time-based error curves under different laundry amounts and / or the time-based error curves under different laundry amount intervals and / or the time-based error curves for the same rated laundry amount are fitted, and the error curves are solidified into the control process. During the rinsing water inlet process, the real-time measured distance is obtained, and the corresponding error value is obtained in the error curve. The actual distance is calculated and compared with the preset value h obtained during the cleaning process to control the rinsing water inlet.

[0140] As described above, in the rinse water inlet control method, the actual distance is obtained by experimentally obtaining an error constant and / or an error curve, and compared with the preset value h mark recorded in the washing program or the preset value h mark obtained through the adaptive program to control the water inlet. The controller pre-stores any one of the error values ​​including but not limited to the error value that varies with the water inlet time mentioned above, the error curve based on the water inlet time, the error value corresponding to different laundry amounts that varies with the water inlet time, or the error curve to obtain the error value. In actual applications, a variety of methods for obtaining the actual distance can be expanded according to the present invention, all of which are within the protection scope of the present invention.

[0141] In the present invention, a pulsator washing machine is taken as an example to introduce the water inlet control method provided by the present invention. It should be noted that the water inlet control method provided by the present invention is also applicable to other types of clothing processing equipment. According to the type of clothing processing equipment and the difference from the pulsator washing machine, the setting position of the ranging sensor is changed so that the ranging sensor can detect the load height inside the washing tub as described above. The above description should not be regarded as a limitation to the present invention.

[0142] The present invention further provides a clothing processing device, including but not limited to the pulsator washing machine described above, adopting the water inlet control method of the clothing processing device described above, including a ranging sensor. As described above, the detection point of the ranging sensor on the washing tub is located at 1 / 3 to 2 / 3 of any radius of the bottom of the washing tub, or the ranging sensor forms multiple detection points at the bottom of the washing tub, and the multiple detection points are on the same straight line, such as on a radius of the washing tub, or the lines connecting the multiple detection points form multiple parallel straight lines.

[0143] Specifically, the ranging sensor may be a laser ranging module, which may include multiple groups of transmitting units 1 and receiving units 2, each group of transmitting units 1 and receiving units 2 being evenly arranged on the door body, and the laser light beams emitted by each group of transmitting units 1 may be connected into a radius of the washing tub at the bottom of the washing tub, or may be connected into multiple parallel straight lines, with each detection point having a different distance from the center point of the washing tub, or may be connected into multiple non-overlapping radii, with each detection point having a different distance from the center point of the washing tub.

[0144] In summary, the water inlet control method of a clothes processing device and the clothes processing device provided by the present invention have the following beneficial effects compared with the prior art:

[0145] 1. No changes are needed to the existing products. Only a distance measuring sensor needs to be added and the control program in the controller needs to be changed to complete the water inlet control method of the present invention.

[0146] 2. Stirring the clothes before water intake can make the top of the clothes as flat as possible and distribute the clothes as evenly as possible to avoid the situation where some clothes are locally high, which will affect the variance calculation results in the later stage and thus affect the water intake control;

[0147] 3. According to the different loads, the water intake is accurately controlled by changing the distance to ensure the washing effect while avoiding the waste of water and electricity;

[0148] 4. When the calculated variance is small, it means that the surface variance of the load (clothing, water surface) is small. When the water intake reaches the washing requirement, the water surface usually overflows the clothing and is relatively stable. In this way, the water intake can be effectively controlled.

[0149] 5. By introducing errors to adjust the measured data during the rinsing water inlet process, the water inlet can be further accurately controlled to improve the rinsing effect.

[0150] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A method for controlling water inlet of a clothes processing device, characterized in that: The laundry processing device comprises a controller and a distance measuring sensor. After entering the rinsing program, the controller controls the water inlet valve to let water into the washing chamber; When the actual distance between the load and the distance measuring sensor during the rinsing water inflow process is greater than or equal to the preset value h mark, it is considered that the water inflow meets the rinsing demand, and the water inflow is stopped.

2. A method for controlling water inlet of a washing machine as claimed in claim 1, characterized in that: A correspondence table between the rinse weight and the preset value h mark is pre-stored in the controller. When water is entering for rinsing, the corresponding preset value h mark is selected from the correspondence table for water inlet control; or when water is entering during the cleaning stage, when the real-time flatness △ of the load surface is less than or equal to the preset flatness threshold, the distance between the load and the distance measuring sensor at this time is obtained and marked as the preset value h mark for water inlet control.

3. A method for controlling water inlet of a washing machine according to claim 1 or 2, characterized in that: When water is introduced during the cleaning phase, the variance is calculated regularly according to the load heights at different positions detected by the distance measuring sensor to obtain the real-time flatness △. When the real-time flatness △ is less than or equal to the flatness threshold, water introduction is stopped.

4. A method for controlling water inlet of a clothes processing device according to claim 3, characterized in that: Before water is introduced into the washing stage, the impeller is controlled to rotate at a first rate or the washing tub and the impeller are controlled to rotate relative to each other to agitate the clothes. After the clothes are agitated for a predetermined time, the washing tub and / or the impeller are controlled to rotate at a second rate to drive the clothes to rotate while detecting and obtaining the initial flatness △1 of the surface of the clothes. Then, the controller controls the water inlet valve to start letting in water.

5. The water inlet control method of a clothes processing device according to claim 4, characterized in that: During the water intake process, the water intake is stopped after each n seconds, the washing tub and / or the pulsator drives the load to rotate at a third rate, and the real-time flatness △ of the load surface is detected at the same time, and the process of water intake and detecting the real-time flatness △ after stopping the water intake is repeated; or during the water intake process, the washing tub and / or the pulsator drives the clothes to rotate at a third rate, and the water intake is stopped after n seconds, and the washing tub and / or the pulsator continues to drive the clothes to rotate at the third rate, and the real-time flatness △ of the load surface is detected at the same time; The process of water inletting and detecting the real-time flatness △ is repeated until the detected real-time flatness △ is less than or equal to the flatness threshold, and the water inletting and the detection of the real-time flatness △ are stopped.

6. The water inlet control method of a clothes processing device according to claim 4, characterized in that: When detecting the flatness of the load surface, the washing tub and / or the pulsator drives the load to rotate at least one circle at a first rate, forming multiple detection points on the load surface, and calculating the variance between the load heights at each detection point to obtain the load surface flatness.

7. A method for controlling water inflow of a clothes processing device according to claim 3, characterized in that: When the real-time flatness △ is less than or equal to a*△1 or the real flatness △ is less than or equal to the flatness threshold or the real-time flatness △ is less than or equal to a*△1 and the real flatness △ is less than or equal to the flatness threshold, the control stops water inlet, and a is the control coefficient, which is a positive number.

8. A method for controlling water inflow of a clothes processing device according to any one of claims 3 to 7, characterized in that: When the real-time flatness △ is less than or equal to the flatness threshold, record the distance value between the load and the distance measuring sensor at each detection point, calculate the average value of all distance values, and record it as the preset value h mark; or sort all distance values, and record the maximum value as the preset value h mark; or calculate the average value of all distance values, and compare it with the maximum value of all distance values, and take the larger value of the two as the preset value h mark.

9. A method for controlling water inflow of a clothes processing device according to claims 1 to 8, characterized in that: The controller pre-stores any one of an error value that varies with water inlet time, an error curve based on water inlet time, and an error value or error curve corresponding to different laundry amounts that varies with water inlet time to obtain a real-time error value and adjust the measured distance to obtain the actual distance between the load and the distance measuring sensor.

10. A clothes processing device, characterized in that: A water inlet control method for a clothes processing device comprising the method described in any one of claims 1 to 9.

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