Water inlet control method of washing machine and washing machine

Abstract

The present application belongs to the technical field of clothes processing equipment, and discloses a water inlet control method of a washing machine and the washing machine. The washing machine comprises an inner drum capable of independently containing washing water when washing clothes. The control method comprises the following steps: obtaining the weight M1 of clothes to be washed, and then feeding water into the inner drum; controlling the rotation of the inner drum, obtaining the first working parameter of the washing machine motor when the inner drum rotates to a set working condition, and calculating the total weight M2 of the clothes and water in the inner drum according to the first working parameter; calculating the actual water inlet amount M in the inner drum M=M2-M1, and stopping water feeding when it is judged that the actual water inlet amount M in the inner drum reaches a preset water inlet amount M0. The present application does not need to detect the water inlet amount of the washing machine through a water amount detection device, but can obtain the water inlet amount of the washing machine through the working parameter of the motor at the set working condition, and then control the water inlet condition of the washing machine. The control method is simple, efficient and low in cost, and effectively solves the problem of difficult control of the water inlet amount of the washing machine with a non-porous inner drum.

Description

Technical Field

[0001] This invention belongs to the technical field of clothing processing equipment, specifically, it relates to a water inlet control method for a washing machine and the washing machine itself. Background Technology

[0002] Washing machines are one of the most commonly used household appliances in people's daily lives. They bring convenience to people's lives. In existing drum washing machines, the outer drum holds water while the inner drum rotates and washes. The inner drum has holes in its wall for introducing washing water or for spin-drying clothes. However, the washing water flows between the inner and outer drums for extended periods, causing dirt and scale to accumulate between them, leading to bacterial growth and secondary contamination of clothes, seriously threatening consumers' health. Furthermore, the water filling the space between the inner and outer drums results in wasted water. Therefore, perforated drum washing machines have been designed.

[0003] However, since there is no water entering the outer drum of a non-perforated inner drum washing machine, and the inner drum is a rotating drum, the existing method of detecting the water level in the inner drum using the air chamber of the outer drum and a water level sensor cannot be used in non-perforated inner drum washing machines.

[0004] Chinese Patent Application No. CN201811237071.8 discloses a drum washing machine and its control method. The drum washing machine includes an inner drum and a water inlet pipe. The inner drum is a non-perforated inner drum that holds washing water during washing. It also includes a water measuring device for measuring the amount of water entering the machine. The water inlet pipe is connected to the water measuring device, and the water measuring device is connected to the inner drum. The water measuring device includes a water level detection device for detecting the water level in the water tank. The water level detection device is a liquid level sensor, which includes an air chamber and a sensor unit. The air chamber is connected to the water tank; or, the water level detection device includes multiple water level detection probes arranged along the depth direction inside the water tank.

[0005] The drum washing machine disclosed in the above application uses a water measuring device to measure water before it enters the inner drum. The water level is then measured by a water level detection device to control the amount of water entering the washing machine. This requires additional water measuring and water level detection devices, making the structure of the washing machine more complex, more expensive, and the control method more cumbersome and difficult to implement.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] 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 that is simpler, lower in cost, and can obtain the water inlet volume of the washing machine without the need for a water volume detection device.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A water inlet control method for a washing machine, the washing machine including an inner drum that can independently hold washing water when washing clothes, the control method including the following steps:

[0010] Obtain the weight M1 of the clothes to be washed, and add water to the inner drum;

[0011] Control the inner drum to rotate, obtain the first working parameters of the washing machine motor when the inner drum rotates to the set working condition, and calculate the total weight M2 of clothes and water in the inner drum based on the first working parameters;

[0012] The actual water inflow into the inner cylinder is calculated to be M = M2 - M1. When the actual water inflow into the inner cylinder M reaches the preset water inflow M0, the water inflow is stopped.

[0013] Furthermore, after the clothes are placed in the inner drum but before the washing machine starts to take in water, the inner drum is controlled to rotate, and the second working parameters of the washing machine motor when the inner drum rotates to the set working condition are obtained, and the weight M1 of the clothes in the inner drum is calculated based on the second working parameters.

[0014] Furthermore, the first operating parameter / second operating parameter is the first operating current / second operating current of the washing machine motor; or, the first operating parameter / second operating parameter is the first operating power / second operating power of the washing machine motor.

[0015] Furthermore, the set working conditions include n different set working conditions, and the values ​​of the first working parameters of the washing machine motor are obtained when the inner drum rotates to different set working conditions;

[0016] Based on the different values ​​of the first operating parameters corresponding to the washing machine motor under different set operating conditions, the total weight M of clothes and water in the inner drum is calculated respectively. 21 M 22 M 2n And calculate the average total weight M2 of the clothes and water inside the inner drum = (M 21 +M 22 +、、、M 2n ) / n, where n≥2.

[0017] Furthermore, the set operating condition is when the inner cylinder rotates to a set speed N0, where the set speed N0 = 60-100 r / min;

[0018] Preferably, after water begins to enter the inner cylinder, the inner cylinder is controlled to gradually increase its speed to the set rotational speed N0 in a step-by-step manner.

[0019] Furthermore, after obtaining the weight M1 of the clothes, the system begins to control the intermittent water intake into the inner drum. During the intermittent time, the inner drum is controlled to rotate to the set operating condition, and the total weight M2 of the clothes and water in the inner drum is calculated based on the operating current parameters of the washing machine motor at this time.

[0020] Furthermore, the value of the preset water intake M0 is determined based on the data table stored in the washing machine server; or, the theoretical water intake of the washing machine is calculated based on the weight M1 of the clothes inside the inner drum and used as the preset water intake M0.

[0021] Furthermore, after water intake begins, the actual water intake volume M of the inner cylinder is detected and calculated at certain preset time intervals; or, after a set time t1 after water intake begins, the actual water intake volume M of the inner cylinder is detected and calculated at certain preset time intervals.

[0022] Preferably, the actual water volume M of the inner drum is calculated each time and fed back to the control unit of the washing machine and displayed on the washing machine's display screen.

[0023] Furthermore, the washing machine also includes a communication unit, which is connected to a smart terminal to feed back the actual water intake M of the inner drum calculated each time to the smart terminal for display. The user can remotely control the water intake of the washing machine through the smart terminal based on the actual water intake M.

[0024] Preferably, when it is determined that the actual water inflow M is about to reach the preset water inflow M0, a prompt message is sent to the user through the smart terminal / machine terminal, and if no instruction from the user to continue water inflow is received within the set time, the water inflow is stopped.

[0025] Another object of the present invention is to provide a washing machine employing any of the above-described water inlet control methods.

[0026] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0027] 1. The washing machine water inlet control method provided by the present invention does not require the water volume detection device to detect the water volume of the washing machine. By obtaining the working parameters of the washing machine motor when the inner drum rotates to the set working condition, the water volume of the washing machine can be obtained, and the water inlet of the washing machine can be controlled. The control method is simple and low in cost, and effectively solves the problem of difficult water volume control in washing machines without perforated inner drums.

[0028] 2. The washing machine water inlet control method provided by this invention obtains the weight of the clothes inside the drum by acquiring the operating parameters of the washing machine motor when the drum rotates to a set operating condition before water is introduced into the washing machine. This eliminates the need for a weight sensor to obtain the weight of the clothes, simplifying the washing machine structure and further reducing costs. Simultaneously, it automatically determines the optimal water inlet volume based on the weight information of the clothes, resulting in a higher degree of automation and effectively improving the washing performance of the washing machine.

[0029] 3. The washing machine water inlet control method provided by the present invention calculates the total weight of clothes and water corresponding to the first working parameter values ​​of the washing machine motor under different working conditions, thereby obtaining the average weight of clothes and water in the inner drum, and using the average value as the current actual water inlet volume. The measurement results are more accurate and reasonable, and the accuracy of water volume control is improved.

[0030] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0032] In the attached diagram:

[0033] Fig. 1 This is a flowchart illustrating the first water inlet control method in an embodiment of the present invention;

[0034] Fig. 2 This is a flowchart illustrating the second water inlet control method in an embodiment of the present invention;

[0035] Fig. 3 This is a schematic diagram of the structure of the washing machine in an embodiment of the present invention;

[0036] In the picture:

[0037] 1. Inner drum; 2. Outer drum; 3. Centrifugal valve; 4. Top panel; 5. Detergent adder box; 7. Sealed chamber; 8. Machine door; 9. Inner drum door; 10. Water inlet pipe; 11. Water inlet valve; 12. Foot; 13. Motor; 14. Inner drum shaft; 15. Hollow channel; 16. Outer shell; 17. Lifting ribs.

[0038] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0039] To make the objectives, 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 accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example 1

[0043] like Figs. 1-2 As shown, this embodiment provides a water inlet control method for a washing machine. The washing machine includes an inner drum that can independently hold washing water when washing clothes. The control method includes the following steps:

[0044] Obtain the weight M1 of the clothes to be washed, and add water to the inner drum;

[0045] Control the inner drum to rotate, obtain the first working parameters of the washing machine motor when the inner drum rotates to the set working condition, and calculate the total weight M2 of clothes and water in the inner drum based on the first working parameters;

[0046] The actual water inflow into the inner cylinder is calculated to be M = M2 - M1. When the actual water inflow into the inner cylinder M reaches the preset water inflow M0, the water inflow is stopped.

[0047] The washing machine water inlet control method provided in this embodiment does not require a water volume detection device to detect the water volume of the washing machine. Instead, it obtains the water volume of the washing machine by acquiring the first operating parameters of the washing machine motor when the inner drum rotates to the set operating condition, and then controls the water inlet of the washing machine. The control method is simple, low-cost, and effectively solves the problem of difficult water volume detection in washing machines with non-perforated inner drums.

[0048] Furthermore, after the clothes are placed in the inner drum but before the washing machine starts to take in water, the inner drum is controlled to rotate, and the second working parameters of the washing machine motor when the inner drum rotates to the set working condition are obtained, and the weight M1 of the clothes in the inner drum is calculated based on the second working parameters.

[0049] Before the washing machine is filled with water, the weight of the clothes inside the drum is obtained by acquiring the second operating parameters of the washing machine motor when the inner drum rotates to the set operating condition. This eliminates the need to use a weight sensor to obtain the weight of the clothes, simplifying the washing machine structure and further reducing costs.

[0050] The washing machine water inlet control method provided in this embodiment can be applied to the water inlet control of the washing program, or it can also be applied to the water inlet control of the rinsing program.

[0051] Furthermore, in this embodiment, the first operating parameter / second operating parameter is the first operating current / second operating current of the washing machine motor; or, the first operating parameter / second operating parameter is the first operating power / second operating power of the washing machine motor.

[0052] The washing machine water inlet control method provided in this embodiment can calculate the total weight M2 of clothes and water in the inner drum by using the detected value of the working current or working power of the washing machine motor under the set working conditions and combining it with theoretical formulas. There is no need to add an additional weight detection device, the measurement method is simpler and the cost is lower.

[0053] Furthermore, the set operating conditions include n different set operating conditions, and the values ​​of the first operating parameters of the washing machine motor are obtained when the inner drum rotates to different set operating conditions.

[0054] Based on the different values ​​of the first operating parameters corresponding to the washing machine motor under different set operating conditions, the total weight M of clothes and water in the inner drum is calculated respectively. 21 M 22 M 2n And calculate the average total weight M2 of the clothes and water inside the inner drum = (M 21 +M 22 +、、、M 2n ) / n, where n≥2.

[0055] In the above implementation, the total weight of clothes and water is calculated by the corresponding first working parameter values ​​of the washing machine motor under different working conditions, so as to obtain the average weight of clothes and water in the inner drum. The average value is used as the current actual water intake, and the measurement results are more accurate and reasonable, further improving the accuracy of water volume control.

[0056] Furthermore, the set operating condition is when the inner cylinder rotates to a set speed N0, where the set speed N0 = 60-100 r / min. In this embodiment, the set operating condition is when the rotational speed of the inner cylinder reaches the set value, but the set operating condition is not limited to just the set speed.

[0057] Preferably, after water begins to enter the inner drum, the inner drum is controlled to gradually increase its speed to the set speed N0 in a step-by-step manner. By gradually increasing the speed of the inner drum to the set speed, the shaking of the water in the inner drum will be relatively reduced, which improves the accuracy of the measurement results and avoids the large rotational inertia of the washing water caused by the inner drum speeding up too quickly, thus affecting the accuracy of the measurement.

[0058] Specifically, after clothes are placed in the inner drum but before the washing machine starts taking in water, the inner drum can be controlled to rotate to the set speed N0, the current second operating current / second operating power of the washing machine motor can be detected, and the weight M1 of the clothes in the inner drum can be calculated based on the current second operating current / second operating power of the washing machine motor.

[0059] After obtaining the weight of the clothes in the inner drum, the system starts controlling the water to enter the inner drum. When the inner drum rotates to the set speed N0 again, the system detects the current first operating current / first operating power of the washing machine motor and calculates the total weight M2 of the clothes and water in the inner drum based on the current first operating current / first operating power of the washing machine motor.

[0060] Preferably, the set operating conditions include two types: the first set operating condition is to control the rotation speed of the inner cylinder to reach a set rotation speed N0, and the second set operating condition is to control the rotation speed of the inner cylinder to reach a set rotation speed N1, wherein the set rotation speed N0 is less than the set rotation speed N1.

[0061] Specifically, upon reaching the preset detection time, the inner drum's rotation speed is first increased to the set speed N0. The first operating current / first operating power of the washing machine motor at this time is then detected, and the weight M of the water and clothes inside the inner drum is calculated. 21 Then, the inner drum speed is increased to the set speed N1, and the first operating current / first operating power of the washing machine motor is detected to calculate the weight M of the water and clothes in the inner drum at this time. 22 And according to M 21 and M 22 Calculate the average total weight of clothes and water inside the inner drum, M2 = (M 21 +M 22 ) / 2.

[0062] In the above embodiment, by controlling the inner drum to rotate to different speeds, the average weight of the clothes and water inside the inner drum is used as the actual water intake. The water intake M2 is obtained by using the average value method, which improves the accuracy of measurement and reduces measurement error.

[0063] Furthermore, after obtaining the weight M1 of the clothes, the system begins to control the intermittent water intake into the inner drum. During the intermittent time, the inner drum is controlled to rotate to the set operating condition, and the total weight M2 of the clothes and water in the inner drum is calculated based on the operating current parameters of the washing machine motor at this time.

[0064] Specifically, the inner drum is controlled to pause at time T2 every time water enters for time T1, and water is entered into the inner drum in an intermittent manner, where T1 > T2. The washing machine is controlled to detect the current water volume during the water entry interval. By adopting the above control method, the normal water entry of the washing machine can be guaranteed without affecting the detection of the water volume.

[0065] Furthermore, the value of the preset water intake M0 can be determined by matching the data table stored in the washing machine server; or, in another more preferred embodiment, the theoretical water intake of the washing machine is calculated based on the weight M1 of the inner drum and used as the preset water intake M0.

[0066] In the above solution, the optimal preset water intake is automatically determined based on the weight information of the clothes, which is more automated and effectively improves the washing effect of the washing machine.

[0067] Furthermore, in one embodiment, after water intake begins, the actual water intake volume M of the inner cylinder is detected and calculated every preset time interval T3. The preset time T3 can be determined based on the value of the preset water intake volume M0. The smaller the value of the preset water intake volume M0, the shorter the preset time interval T3 can be. The larger the value of the preset water intake volume M0, the longer the preset time interval T3 can be.

[0068] Alternatively, in another implementation, after a set time t1 after the start of water intake, the actual water intake volume M of the inner cylinder is detected and calculated every preset time T3. Since the preset water intake volume M0 will not be reached or approached immediately in the early stage of water intake, the detection is started after the start of water intake time t1, which can save the trouble caused by unnecessary detection in the early stage, save energy and simplify the control steps.

[0069] Alternatively, in another implementation, after a set time t1 after the start of water intake, the actual water intake M of the inner cylinder is detected and calculated every preset time T3. When it is determined that the actual water intake M reaches the second preset value M0ˊ, where M0ˊ < M0 and the value of M0ˊ is close to M0, the actual water intake M of the inner cylinder is detected and calculated every preset time T4, where T4 < T3.

[0070] By adopting the above control method, the detection interval T3 in the early stage of water inflow is longer than the detection interval T4 in the later stage, which reduces the number of detections and saves measurement and time costs. At the same time, when the water inflow M reaches the second preset value M0ˊ, the detection cycle is shortened, avoiding the phenomenon that the water inflow exceeds the preset water inflow M0.

[0071] Preferably, the actual water intake volume M of the inner drum is calculated each time and fed back to the washing machine's control unit and displayed on the washing machine's display screen. By displaying the actual water intake volume M on the washing machine's display screen, users can intuitively understand the current water intake volume, resulting in a better user experience.

[0072] Furthermore, the washing machine also includes a communication unit, which is connected to a smart terminal to feed back the actual water intake M of the inner drum calculated each time to the smart terminal for display. The user can remotely control the water intake of the washing machine through the smart terminal based on the actual water intake M.

[0073] Preferably, when it is determined that the actual water inflow M is about to reach the preset water inflow M0, a prompt message is sent to the user through the smart terminal / machine terminal, and if no instruction from the user to continue water inflow is received within the set time, the water inflow is stopped.

[0074] By using a smart terminal to remotely control the water intake of the washing machine, the level of intelligence of the washing machine is improved. When the water intake M is about to reach the preset water intake M0, a prompt message is sent to the user, and the user can choose whether to continue water intake.

[0075] For example, if the clothes to be washed are made of a highly absorbent material, the amount of water required may be more than that of other materials of the same weight. Therefore, when the water intake M is about to reach the preset water intake M0, the user can selectively extend the water intake time through the smart terminal or the machine itself to ensure sufficient water for washing and to ensure the washing effect.

[0076] The washing machine water inlet control method provided in this embodiment mainly includes the following steps:

[0077] S1: Control the inner drum to rotate to the set speed N0, detect the second working parameter of the washing machine motor at this time, and calculate the weight M1 of the clothes inside the inner drum;

[0078] S2: Based on the obtained weight of the clothing M1, calculate the theoretical water intake M0 of the inner drum using a logical formula;

[0079] S3: Control the inner drum to rotate to the set speed N0, detect the second working parameter of the washing machine motor at this time, and calculate the weight M2 of the clothes and water inside the inner drum;

[0080] S4: Calculate the actual water inflow rate of the inner cylinder M = M2 - M1;

[0081] S5: When the calculated water mass in the inner cylinder M = M2 - M1 reaches M0, the water intake is complete;

[0082] S6: Perform the washing / rinsing step.

[0083] Example 2

[0084] Based on Embodiment 1, this embodiment provides a washing machine that employs an upper washing machine water inlet control method.

[0085] like Fig. 3 As shown, the washing machine provided in this embodiment is a front-opening drum washing machine with a non-perforated inner drum. It has a simple structure and can greatly reduce the washing water consumption of the washing machine by eliminating the need to fill the space between the inner drum 1 and the outer drum 2 with washing / rinsing water. It also avoids the possibility of dirt adhering between the inner drum 1 and the outer drum 2, greatly improves user health and user experience, and greatly saves water resources.

[0086] The drum washing machine of this embodiment has a casing 16, which includes: a top panel 4, a front panel, a back panel, and a bottom panel. Base feet 12 are installed and fixed on the bottom panel to support the entire washing machine. Inside the casing 16 is an outer drum 2, and inside the outer drum 2 is an inner drum 1 coaxially arranged. The main purpose of the outer drum 2 is to collect the drainage from the inner drum 1 and the drainage from the high-speed centrifugal spin-drying process of the inner drum 1. An openable / closable door 8 is installed on the casing 16.

[0087] Preferably, the inner drum 1 is provided with lifting ribs 17 to continuously lift and tumble the clothes to clean them. The bottom of the outer drum 2 has a central mounting hole for mounting and fixing a bearing. The inner drum shaft 14, which is fastened to the inner drum 1, passes through the bearing and connects to the washing machine motor 13. An openable / closable inner drum door 9 is installed on the front opening of the inner drum 1, thus making the inner drum 1 a sealed chamber 7 structure.

[0088] Furthermore, the washing machine motor 13 is connected to the inner drum 1 via the inner drum shaft 14 to drive the inner drum 1 to rotate. The inner drum shaft 14 has a hollow channel 15 that connects to the inside of the inner drum 1. The water inlet pipe 10 of the washing machine is connected to the hollow channel 15 of the inner drum shaft 14 to supply water to the inner drum 1. The water inlet pipe 10 and the hollow channel 15 are connected by a dynamic seal.

[0089] One end of the water inlet pipe 10 is connected to the hollow channel 15 and the other end is connected to the detergent addition box 5. The detergent addition box 5 has an inlet connected to the water inlet valve 11 of the washing machine and an outlet connected to the water inlet pipe 10. When water is introduced for washing or rinsing, the water inlet valve 11 is opened and the water flows through the detergent addition box 5. After mixing with the detergent in the detergent addition box 5, the water enters the water inlet pipe 10 and enters the inner drum 1 through the hollow channel 15 in the inner drum shaft 14.

[0090] Furthermore, a drain hole is provided on the peripheral wall of the inner cylinder 1, and the lifting rib 17 is installed on the inner wall of the inner cylinder 1 corresponding to the drain hole. The lifting rib 17 has a lifting shell, and a centrifugal valve 3 is installed in the lifting shell. The centrifugal valve 3 is normally closed. When the rotation speed of the inner cylinder 1 reaches a set value, the centrifugal valve 3 is opened by centrifugal force to drain the water.

[0091] Preferably, the inner drum 1 of the washing machine provided in this embodiment has a taper, with the inner diameter being the largest at the middle position, and the front and rear ends gradually tilting and converging towards the middle position. The drain hole is opened at the position where the taper of the inner drum 1 is the largest. When the inner drum 1 rotates, the centrifugal water on the tapered surface of the inner drum 1 will move along the direction of the tapered surface towards the centrifugal valve 3 under the action of centrifugal force, and converge, which facilitates drainage, improves drainage efficiency, and effectively realizes the high-efficiency dehydration and centrifugal drainage of the non-perforated inner drum.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A water inlet control method for a washing machine, characterized in that, The washing machine includes an inner drum that can independently hold the washing water when washing clothes. The inner drum is tapered, with the largest inner diameter at the middle position. The drum wall extends outward at an angle as it converges from the front and rear ends towards the middle. The control method includes the following steps: After the clothes are put into the inner drum, before the washing machine starts to fill with water, the inner drum is controlled to rotate, and the second working parameters of the washing machine motor when the inner drum rotates to the set working condition are obtained. The weight M1 of the clothes to be washed in the inner drum is calculated based on the second working parameters, and water is filled into the inner drum. Control the inner drum to rotate, obtain the first working parameters of the washing machine motor when the inner drum rotates to the set working condition, and calculate the total weight M2 of clothes and water in the inner drum based on the first working parameters; The actual water inflow into the inner cylinder is calculated to be M = M2 - M1. When the actual water inflow into the inner cylinder M reaches the preset water inflow M0, the water inflow is stopped. Among them, after the set time t1 after the water starts to enter, the actual water volume M of the inner cylinder is detected and calculated once every preset time T3. When it is determined that the actual water volume M reaches the second preset value M0ˊ, the actual water volume M of the inner cylinder is detected and calculated once every preset time T4. Among them, M0ˊ < M0, the value of M0ˊ is close to M0, and T4 < T3; The set working conditions include n different set working conditions, and the values ​​of the first working parameters of the washing machine motor are obtained when the inner drum rotates to different set working conditions; Based on the different values ​​of the first operating parameters corresponding to the washing machine motor under different set operating conditions, the total weight M of clothes and water in the inner drum is calculated respectively. 21 M 22 …M 2n And calculate the average total weight M2 of the clothes and water inside the inner drum = (M 21 + M 22 +…M 2n ) / n, where n≥2.

2. The water inlet control method for a washing machine according to claim 1, characterized in that: The first operating parameter / second operating parameter is the first operating current / second operating current of the washing machine motor; or, the first operating parameter / second operating parameter is the first operating power / second operating power of the washing machine motor.

3. The water inlet control method for a washing machine according to claim 1 or 2, characterized in that: The set operating condition is when the inner cylinder rotates to a set speed N0, where the set speed N0 = 60-100 r / min.

4. The water inlet control method for a washing machine according to claim 3, characterized in that: After water begins to enter the inner cylinder, the inner cylinder is controlled to gradually increase its speed in a stepped manner until the set speed N0 is reached.

5. The water inlet control method for a washing machine according to claim 1 or 2, characterized in that: After obtaining the weight M1 of the clothes, the system starts to control the intermittent water intake into the inner drum. During the interval, the inner drum is controlled to rotate to the set working condition, and the total weight M2 of the clothes and water in the inner drum is calculated based on the working current parameters of the washing machine motor at this time.

6. The water inlet control method for a washing machine according to claim 1 or 2, characterized in that: The value of the preset water intake M0 is determined based on the data table stored in the washing machine server; or, the theoretical water intake of the washing machine is calculated based on the weight M1 of the clothes inside the inner drum and used as the preset water intake M0.

7. The water inlet control method for a washing machine according to claim 1 or 2, characterized in that: Each time, the actual water volume M entering the inner drum is calculated and fed back to the washing machine's control unit and displayed on the washing machine's screen.

8. The water inlet control method for a washing machine according to claim 1 or 2, characterized in that: The washing machine also includes a communication unit, which is connected to a smart terminal to feed back the actual water intake M of the inner drum calculated each time to the smart terminal for display. The user can remotely control the water intake of the washing machine through the smart terminal based on the actual water intake M.

9. The water inlet control method for a washing machine according to claim 8, characterized in that: When it is determined that the actual water intake M is about to reach the preset water intake M0, a prompt message is sent to the user through the smart terminal / machine terminal, and if no instruction to continue water intake is received from the user within the set time, the water intake is stopped.

10. A washing machine, characterized in that, The water inlet control method of the washing machine according to any one of claims 1-9 is adopted.

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