A method for controlling water inlet of a washing machine

Abstract

The present invention provides a method for controlling water inlet of a washing machine, wherein the washing machine comprises a washing tub, wherein the washing tub independently holds washing water during the washing process, and the control method comprises: during the water inlet stage of the washing machine, the washing machine obtains the load weight of the washing tub, and controls the water inlet process of the washing tub according to the load weight of the washing tub. Aiming at the problem that it is difficult to use a traditional pressure-type water level sensor to detect and control the water inlet amount in the existing non-hole inner barrel washing machine, the present invention proposes a control method for controlling the water inlet amount by using a motor weighing, thereby realizing accurate control of the water inlet amount of the washing machine without the need for an additional flow meter, and reducing the cost of the washing machine.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a method for controlling water inlet of a washing machine. Background Art

[0002] The structures of existing common washing machines are basically the same, generally including an outer barrel for holding water and an inner barrel rotatably arranged inside the outer barrel, the inner barrel is provided with a large number of water holes or dehydration holes, the clothes are put into the inner barrel, and the outer barrel is used to hold water. The water level detection or water inflow control of these common washing machines generally adopts water level sensor detection control, or detection control by flow meter, such as a pressure water level sensor is arranged in the outer barrel, the pressure water level sensor senses the water pressure to determine the water level height in the inner barrel, and the flow meter determines the water inflow of the washing machine by detecting the water flow rate flowing through.

[0003] However, for a washing machine with another structure, which includes a rotatable washing barrel for holding washing water during the washing process, the washing machine with this structure is generally called a hole-free inner barrel washing machine. It is difficult for the hole-free inner barrel washing machine to detect the water level using the principle of a pressure water level sensor. In order to detect the amount of water entering, the hole-free inner barrel washing machine often adds a flow meter to measure and control the amount of water entering, which undoubtedly increases the equipment cost.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a method for controlling water inlet of a washing machine. Aiming at the problem that it is difficult to use a traditional pressure-type water level sensor to detect and control the water inlet of an existing non-hole inner barrel washing machine, a control method for controlling the water inlet by using a motor weighing is proposed, which realizes accurate control of the water inlet of the washing machine without adding an additional flow meter, reduces the cost of the washing machine, and adopts the following technical solutions:

[0006] A method for controlling water inlet of a washing machine, the washing machine comprising a washing tub, the washing tub independently containing washing water during a washing process, the control method comprising: during a water inlet stage of the washing machine, the washing machine obtains a load weight of the washing tub, and controls the water inlet process of the washing tub according to the load weight of the washing tub.

[0007] In the above scheme, in order to solve the problem that the existing hole-free inner barrel washing machine is difficult to detect and control the water inlet volume using the traditional pressure water level sensor, a control method of controlling the water inlet volume using motor weighing is proposed, which realizes the accurate control of the water inlet volume of the washing machine without the need for an additional flow meter, thereby reducing the cost of the washing machine.

[0008] Preferably, the washing machine includes a motor for driving the washing tub to rotate, the washing machine controls the rotation of the motor, detects motor parameters, determines the load weight of the washing tub, and controls the water inflow process of the washing tub according to the load weight of the washing tub.

[0009] Alternatively, the washing machine includes a weighing device, and the washing machine weighs the load weight of the washing tub through the weighing device, and controls the water inflow process of the washing tub according to the load weight of the washing tub.

[0010] Preferably, in the water inlet stage, the washing tub is continuously filled with water, the washing machine obtains the load weight of the washing tub, and controls the water inlet process of the washing tub according to the load weight of the washing tub.

[0011] In the above scheme, during the process of obtaining the load weight of the washing tub, the washing machine maintains the water intake process, which does not affect the normal water intake time of the washing machine.

[0012] Preferably, during the continuous water inflow of the washing tub, the washing machine obtains the load weight of the washing tub at intervals for multiple times. After obtaining the load weight of the washing tub each time, the washing machine determines whether the current water inflow reaches the target water inflow according to the load weight of the washing tub. If the judgment result is yes, the washing machine controls the water inflow process to end, otherwise the washing machine controls to obtain the load weight of the washing tub again after the set interval.

[0013] In the above scheme, when it is detected that the water intake reaches the target water intake, the washing machine controls the water intake process to end. When the current water intake is lower than the target water intake, the washing machine controls to obtain the load weight of the washing tub again after a certain interval, and again determines whether the water intake reaches the target water intake until the washing tub reaches the target water intake.

[0014] Preferably, the washing machine calculates the difference between the current water inflow and the target water inflow each time after obtaining the load weight of the washing tub, and determines the time interval for obtaining the load weight of the washing tub next time according to the difference.

[0015] Preferably, during the process of continuous water intake into the washing tub, the washing machine obtains the load weight of the washing tub at intervals for multiple times. After obtaining the load weight of the washing tub each time, the washing machine determines whether the difference between the current water intake and the target water intake is less than a set threshold. If the judgment result is yes, the washing machine executes the water intake process and the process of obtaining the load weight of the washing tub at intervals until it is determined that the water intake reaches the target water intake. Otherwise, the washing machine controls the washing tub to keep continuously intake water.

[0016] In the above scheme, the set threshold is a relatively small value. If the difference between the current water inflow and the target water inflow is less than the set threshold, it indicates that the actual water inflow is approaching the target water inflow. At this time, in order to prevent the water inflow from being too large, the washing machine controls the interval execution of the water inflow process and the process of obtaining the load weight of the washing tub, instead of maintaining continuous water inflow. If it is detected that the actual water inflow still has a certain deviation from the target water inflow, in order not to affect the total water inflow time, the washing machine controls the continuous water inflow process.

[0017] Preferably, during the continuous water inflow into the washing tub, the washing machine detects a weight change of the washing tub load, calculates a water inflow rate, and determines a remaining water inflow time for the washing tub according to the water inflow rate.

[0018] Preferably, during the continuous water filling of the washing tub, the washing machine obtains the load weight of the washing tub at intervals, calculates the difference between the load weights of the washing tub obtained twice adjacently, and divides the difference by the corresponding time interval to obtain the water filling rate; the washing machine divides the remaining water filling amount of the washing tub by the water filling rate to obtain the remaining water filling time of the washing tub.

[0019] In another embodiment, during the water inlet stage, the washing machine performs the water inlet process and the process of obtaining the washing tub load weight at intervals until the washing tub reaches the target water inlet volume; wherein the washing machine determines the difference between the actual water inlet volume and the target water inlet volume based on the washing tub load weight obtained each time, and determines the water inlet duration of the next water inlet process based on the difference.

[0020] In the above scheme, during the water inlet stage, the washing machine performs the water inlet process and the process of obtaining the washing tub load weight at intervals. Although this will slightly extend the total water inlet time, the water inlet value detected by the washing machine is more accurate and the problem of excessive water inlet will not occur.

[0021] The washing machine determines the water inflow rate according to the difference between the washing tub load weights obtained two consecutive times and the corresponding time interval, and divides the difference between the target water inflow volume and the current water inflow volume of the washing tub by the water inflow rate to obtain the water inflow duration of the next water inflow process.

[0022] Preferably, after receiving a washing instruction, the washing machine first controls the motor to detect the weight of the clothes to be washed, and the washing machine obtains the load weight of the washing tub, including: in the water inlet stage, the motor detects the load weight of the washing tub, and the washing machine subtracts the weight of the clothes to be processed from the load weight of the washing tub to obtain the water inflow of the washing tub.

[0023] In the above scheme, the washing machine first controls the motor to detect the weight of the laundry to be washed, so that during the water filling stage, the water filling amount of the washing tub can be determined according to the difference between the washing tub load weight detected by the motor and the weight of the laundry to be processed.

[0024] Preferably, the washing machine also automatically determines the target water intake volume according to the detected weight of the laundry to be washed.

[0025] Or the washing machine has a clothing recognition function, the washing machine recognizes clothing information of the clothing to be processed, such as material information, weight information, category information, style information, and automatically determines the target water intake amount based on this information.

[0026] Or the washing machine receives the target water intake volume set by the user.

[0027] Preferably, after the water inflow process of the washing machine is completed, the load weight of the washing tub is obtained, the deviation rate between the actual water inflow and the target water inflow is calculated, and it is determined whether the deviation rate is within a set range. If the determination result is yes, the washing machine continues to perform the washing program, otherwise the washing machine performs the water replenishment process according to the deviation value between the actual water inflow and the target water inflow;

[0028] Preferably, the washing machine divides the actual water intake by the total water intake time to obtain the water intake rate, and divides the deviation by the water intake rate to obtain the water replenishment time.

[0029] Preferably, during the drainage stage of the washing machine, the washing machine obtains the load weight of the washing tub and controls the drainage process of the washing tub according to the detection information.

[0030] In the above scheme, by controlling and detecting the weight of the washing load, it can be ensured that the washing water in the non-porous inner barrel washing machine is discharged.

[0031] Preferably, in the drainage stage, after the washing machine completes the drainage process of the set duration, the control motor detects the load weight of the washing tub to determine whether the detected load weight of the washing tub is less than the set load weight value. If the judgment result is yes, it is determined that all the washing water in the washing tub is drained; otherwise, it is determined that there is remaining washing water in the washing tub, and the washing machine control continues to execute the drainage process.

[0032] Preferably, after receiving the washing instruction, the washing machine first controls the motor to detect the weight of the clothes to be washed, multiplies the weight of the clothes to be washed by the water correction parameter to obtain the water content weight value of the clothes, and after the drainage process is completed, the washing machine controls the motor to detect the load weight of the washing tub, and determines whether the load weight of the washing tub is less than the water content weight value of the clothes. If the judgment result is yes, it is determined that all the washing water in the washing tub is drained, otherwise it is determined that there is remaining washing water in the washing tub, and the washing machine control continues to execute the drainage process.

[0033] In the above scheme, the weight of the laundry to be processed is processed to obtain the water content weight, and after the drainage is completed, it is determined whether the washing water has been completely drained based on the relationship between the actual load weight and the water content weight.

[0034] The correction parameter is the factory setting value of the washing machine, or the user setting value. Preferably, the water content correction parameter is a variable. After the washing machine recognizes the clothing information, it automatically determines the water content correction parameter according to the clothing information. The water content correction parameter is related to the material of the clothing and is determined according to the water absorption rate of different clothing materials.

[0035] By adopting the above technical solution, the present invention has the following beneficial effects:

[0036] The present invention provides a method for controlling water inlet of a washing machine, the washing machine comprising a washing tub and a motor for driving the washing tub to rotate, the washing tub containing washing water during the washing process, the control method comprising: in the water inlet stage of the washing machine, the washing machine obtains the load weight of the washing tub, and controls the water inlet process of the washing tub according to the load weight of the washing tub. Aiming at the problem that it is difficult to use a traditional pressure water level sensor to detect and control the water inlet amount in the existing non-hole inner barrel washing machine, the present invention proposes a control method for controlling the water inlet amount by using a motor weighing, so that the water inlet amount of the washing machine can be accurately controlled without adding an additional flow meter, thereby reducing the cost of the washing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of a washing machine of the present invention;

[0038] Figure 2 is a diagram of the steps of controlling water inlet of a washing machine in Embodiment 4 of the present invention;

[0039] Figure 3 This is a diagram of the water inlet control steps of a washing machine in the tenth embodiment of the present invention.

[0040] Among them, 1. external barrel; 2. washing barrel; 3. clothes; 4. motor; 5. impeller; 6. drain valve; 7. waterway; 8. hanging rod; 9. balance ring; 10. hanging rod seat; 11. drain pipe. DETAILED DESCRIPTION

[0041] 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.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships 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.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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.

[0044] The present invention provides a method for controlling water inlet of a washing machine. Figure 1 As shown, the washing machine is a waterless washing machine between barrels (also known as a hole-free inner barrel washing machine), including a housing and a washing barrel 2 rotatably arranged in the housing, and an outer barrel 1 is arranged at the bottom of the washing barrel 2, and the washing barrel 2 is used to hold washing water during the washing process. The barrel wall of the washing barrel 2 is only provided with a dehydration hole at the upper part, and a sealing structure is arranged on the water outlet at the bottom of the washing barrel. During washing, there is no water between the washing barrel and the outer barrel 1, and the washing water and the clothes to be washed are all inside the washing barrel. The washing barrel is both a water-containing barrel and a centrifugal dehydration barrel. During centrifugal dehydration, the washing barrel rotates at a high speed, and the residual water in the clothes flows upward along the water channel 7 on the inner wall of the washing barrel under the action of centrifugal force, and is thrown out through a circle of overflow holes distributed under the balance ring 9 at the barrel mouth of the washing barrel. Since the water in the "sandwich" of the inner and outer barrels of the traditional washing machine is saved, the water-saving effect of this type of washing machine can reach an average of more than 50%.

[0045] The working principle of the drum waterless washing machine is as follows:

[0046] A water outlet is provided at the bottom of the washing tub 2, and the water outlet is sealed by the top cover. When the washing tub is ready to drain, it is positioned by a positioning structure to achieve the coincidence of the sealing structure and the position of the drain valve. At this time, the drain valve 6 starts to rise through the push of the drain motor, and the drain valve hits the cylinder of the top cover, driving the top cover to move up, and a gap is generated between the top cover and the bottom of the tub to achieve drainage. At this time, the tension spring is also stretched to the maximum stroke. After the drainage is completed, the drainage motor rotates, driving the drain valve to retract, and the top cover re-seals the inner tub under the action of the tension spring, so that there is no water between the washing tub and the outer tub during washing.

[0047] When the motor 4 rotates, the washing water and clothes all serve as part of the motor's load. The total weight of the water and clothes can be measured by the weighing method of the motor's rotation. The weight of the incoming washing water is deducted from the weight of the clothes initially tested. In this way, the water intake of the washing machine can be accurately tested.

[0048] Embodiment 1

[0049] The first embodiment provides a method for controlling water inflow of a washing machine, the washing machine comprising a washing tub and a motor for driving the washing tub to rotate, the washing tub containing washing water during the washing process, the control method comprising: during the water inflow stage of the washing machine, the washing machine obtains the load weight of the washing tub, and controls the water inflow process of the washing tub according to the load weight of the washing tub. In view of the problem that it is difficult to use a traditional pressure-type water level sensor to detect and control the water inflow in the existing non-hole inner barrel washing machine, the present embodiment proposes a control method for controlling the water inflow by using a motor weighing, so that the water inflow of the washing machine can be accurately controlled without adding an additional flow meter, thereby reducing the cost of the washing machine.

[0050] In the water inlet stage, the washing tub is continuously filled with water, and the washing machine obtains the load weight of the washing tub during the water inlet process, and controls the water inlet process of the washing tub according to the load weight of the washing tub. In this scheme, during the process of detecting the water inlet amount of the washing tub, the washing machine maintains the water inlet process, which does not affect the normal water inlet time of the washing machine.

[0051] Preferably, the washing machine determines whether the current water inflow reaches the target water inflow according to the detection information of the motor. If the judgment result is yes, the washing machine controls the water inflow process to end. Otherwise, the washing machine controls to obtain the washing tub load weight again after a set interval. In this scheme, when it is detected that the water inflow reaches the target water inflow, the washing machine controls to end the water inflow process. When the current water inflow is lower than the target water inflow, the washing machine controls to obtain the washing tub load weight again after a certain interval, and determines again whether the water inflow reaches the target water inflow. Each time the washing machine obtains the washing tub load weight, it calculates the difference between the current water inflow and the target water inflow, and determines the time interval for obtaining the washing tub load weight next time according to the difference, so as to timely detect the washing tub load weight and prevent the washing tub from having too much water inflow.

[0052] In summary, the washing machine water inlet control method of this embodiment includes the following steps:

[0053] S1. During the water inlet stage, the washing tub is continuously filled with water;

[0054] S2, the washing machine obtains the load weight of the washing tub;

[0055] S3, the washing machine detects whether the current water inflow reaches the target water inflow. If the judgment result is yes, it goes to step S5, otherwise it goes to step S4;

[0056] S4, the washing machine controls the interval setting time and obtains the load weight of the washing tub again, and enters step S3;

[0057] S5: The washing machine controls the water inlet process to end.

[0058] Considering that when the water inflow of the washing tub is close to the target water inflow, the washing machine cannot accurately detect the water inflow, which may easily cause the water inflow to be too large. In this embodiment, the washing machine further determines whether the difference between the current water inflow and the target water inflow is less than the set threshold value according to the detection information of the motor. If the judgment result is yes, the washing machine controls the interval execution of the water inflow process and the process of obtaining the load weight of the washing tub until the motor detects that the water inflow reaches the target water inflow. Otherwise, the washing machine controls the washing tub to keep the water inflow continuously. In this scheme, the set threshold value is a smaller value. If the difference between the current water inflow and the target water inflow is less than the set threshold value, it indicates that the actual water inflow is about to approach the target water inflow. At this time, in order to prevent the water inflow from being too large, the washing machine controls the interval execution of the water inflow process and the process of obtaining the load weight of the washing tub, instead of keeping the water inflow continuously. If it is detected that the actual water inflow still has a certain deviation from the target water inflow, in order not to affect the total water inflow time, the washing machine controls the continuous water inflow process.

[0059] Embodiment 2

[0060] In the second embodiment, another method for controlling water inlet of a washing machine is provided: during the continuous water inlet process of the washing tub, the washing machine detects the change in the load weight of the washing tub, calculates the water inlet rate, and determines the remaining water inlet time of the washing tub according to the water inlet rate, and the washing machine executes the corresponding water inlet process according to the remaining water inlet time.

[0061] Preferably, during the continuous water filling of the washing tub, the washing machine obtains the load weight of the washing tub at intervals, calculates the difference between the load weights of the washing tub obtained twice adjacently, and divides the difference by the corresponding time interval to obtain the water filling rate; the washing machine divides the remaining water filling amount of the washing tub by the water filling rate to obtain the remaining water filling time of the washing tub.

[0062] Embodiment 3

[0063] In the third embodiment, another method for controlling water inlet of a washing machine is provided.

[0064] Specifically, during the water inlet stage of the washing machine, the washing machine performs the water inlet process and the process of obtaining the washing tub load weight at intervals until the washing tub reaches the target water inlet volume; wherein the washing machine determines the difference between the actual water inlet volume and the target water inlet volume according to the washing tub load weight obtained each time, and determines the water inlet duration of the next water inlet process according to the difference. The washing machine determines the water inlet rate according to the difference between the washing tub load weights obtained twice in a row and the corresponding time interval, and divides the difference between the target water inlet volume and the current water inlet volume of the washing tub by the water inlet rate to obtain the water inlet duration of the next water inlet process. wherein the washing machine determines the water inlet rate according to the washing tub load weight detected for the first time and the corresponding water inlet time.

[0065] In this embodiment, during the water filling stage, the washing machine performs the water filling process and the process of obtaining the washing tub load weight at intervals, although the total water filling time will be slightly extended, but the water filling amount value detected by the washing machine is more accurate, and the problem of excessive water filling will not occur. Moreover, the washing machine can roughly determine the time required for water filling based on the difference between the actual water filling amount and the target water filling amount detected each time, so it does not need to perform too many alternate water filling and water filling amount detection processes.

[0066] After the washing machine has finished the water inflow process, the load weight of the washing tub is obtained, the deviation rate between the actual water inflow and the target water inflow is calculated, and it is determined whether the deviation rate is within a set range. If the determination result is yes, the washing machine continues to perform the washing program, otherwise the washing machine performs the water replenishment process according to the deviation value between the actual water inflow and the target water inflow;

[0067] Preferably, the washing machine divides the actual water intake by the total water intake time to obtain the water intake rate, and divides the deviation by the water intake rate to obtain the water replenishment time.

[0068] Embodiment 4

[0069] In the fourth embodiment, after receiving the washing instruction, the washing machine first controls the motor to detect the weight of the clothes to be washed, and the washing machine obtains the washing tub load weight, including: in the water inlet stage, the motor detects the washing tub load weight, and the washing machine subtracts the weight of the clothes to be processed from the washing tub load weight to obtain the washing tub water inflow. In this embodiment, the washing machine first controls the motor to detect the weight of the clothes to be washed, so that in the water inlet stage, the washing tub water inflow can be determined according to the difference between the washing tub load weight detected by the motor and the weight of the clothes to be processed.

[0070] Furthermore, the washing machine automatically determines the target water intake volume according to the detected weight of the clothes to be washed.

[0071] Or the washing machine has a clothing recognition function, the washing machine recognizes clothing information of the clothing to be processed, such as material information, weight information, category information, style information, and automatically determines the target water intake amount based on this information.

[0072] Or the washing machine receives the target water intake volume set by the user.

[0073] See also Figure 2 As shown, the washing machine water inlet control process in this embodiment includes the following steps:

[0074] S101, the washing machine receives a washing instruction;

[0075] S102, the washing machine obtains the weight of the clothes to be processed;

[0076] S103, the washing machine determines a target water intake amount according to the weight of the clothes to be processed;

[0077] S104, the washing machine controls the water inlet valve to be turned on and performs the water inlet process;

[0078] S105, the washing machine obtains the load weight of the washing tub;

[0079] S106, the washing machine determines whether the load weight of the washing tub is less than the sum of the weight of the clothes to be processed and the target water intake volume. If the determination result is yes, the process proceeds to step S104, otherwise the process proceeds to step S107;

[0080] S107, the washing machine controls the water inlet process to end.

[0081] Embodiment 5

[0082] In the fifth embodiment, during the drainage stage of the washing machine, the washing machine obtains the load weight of the washing tub and controls the drainage process of the washing tub according to the detection information. The present invention can ensure that all washing water in the hole-free inner barrel washing machine is discharged by controlling and detecting the washing load weight.

[0083] During the drainage stage, after the washing machine completes the drainage process of the set duration, the control motor detects the load weight of the washing tub and determines whether the detected load weight of the washing tub is less than the set load weight value. If the judgment result is yes, it is determined that all the washing water in the washing tub is drained; otherwise, it is determined that there is remaining washing water in the washing tub and the washing machine control continues to execute the drainage process.

[0084] Preferably, after receiving the washing instruction, the washing machine first controls the motor to detect the weight of the clothes to be washed, multiplies the weight of the clothes to be processed by the water content correction parameter to obtain the water content weight value of the clothes, and after the drainage process is completed, the washing machine controls the motor to detect the load weight of the washing tub, and determines whether the load weight of the washing tub is less than the water content weight value of the clothes. If the judgment result is yes, it is determined that all the washing water in the washing tub is discharged, otherwise it is determined that there is residual washing water in the washing tub, and the washing machine controls to continue the drainage process. In this embodiment, the water content weight is obtained by performing data processing on the weight of the clothes to be processed, and after the drainage is completed, it is determined whether the washing water has been discharged according to the relationship between the actual load weight and the water content weight.

[0085] The correction parameter is the factory setting value of the washing machine, or the user setting value. Preferably, the water content correction parameter is a variable. After the washing machine recognizes the clothing information, it automatically determines the water content correction parameter according to the clothing information. The water content correction parameter is related to the material of the clothing and is determined according to the water absorption rate of different clothing materials.

[0086] The following is an explanation of the process of obtaining the weight of the washing tub load by the washing machine:

[0087] The first solution is that the washing machine controls the motor to drive the washing tub from stationary to moving, and detects the current required for the motor to rotate from stationary to rotating. The greater the load weight, the greater the driving current. The load weight can be obtained based on the detected driving current.

[0088] The second solution is that the washing machine controls the motor to suddenly stop rotating, and the motor continues to rotate due to inertia to cut the magnetic flux lines, generating a current or electromotive force. The greater the load weight, the greater the reverse driving force.

[0089] The third solution is that the washing machine controls the motor to stop suddenly from rotating, and records the time required for the motor to stop rotating. The larger the load weight, the greater the inertia and the longer the stop time. Therefore, the load weight of the washing tub can be determined based on the stop time.

[0090] In another embodiment, the washing machine includes a weighing device, which weighs the load weight of the washing tub through the weighing device and controls the water inflow process of the washing tub according to the load weight of the washing tub. The weighing device can be set on the hanging rod of the washing machine, so as to directly detect the load weight of the washing tub. In this way, the washing machine directly executes the water inflow process according to the load weight of the washing tub detected by the weighing device, ensuring that the actual water inflow of the washing tub is the target water inflow.

[0091] Embodiment 6

[0092] In the sixth embodiment, the water inlet control method of the washing machine includes: the washing machine performs a pre-water inlet process, and after the pre-water inlet process is completed, detects the actual water inlet amount of the washing tub, determines a water inlet amount deviation parameter according to the actual water inlet amount and the theoretical water inlet amount corresponding to the pre-water inlet process, and adjusts the subsequent water inlet amount according to the water inlet amount deviation parameter. In view of the problem that it is difficult to use a traditional pressure water level sensor to detect and control the water inlet amount in the existing hole-free inner barrel washing machine, the present invention proposes a water inlet control method that uses motor weighing and water inlet in batches to correct the water inlet deviation, so as to accurately control the water inlet amount of the washing machine.

[0093] In this embodiment, the washing machine sets a total water inlet volume and a pre-water inlet volume, executes a pre-water inlet process of introducing the pre-water inlet volume into a washing tub, executes a pre-water inlet process of introducing the pre-water inlet volume into a washing tub, and after the pre-water inlet process, detects the actual water inlet volume of the washing tub, determines a water inlet volume deviation parameter according to the actual water inlet volume and the pre-water inlet volume, and adjusts subsequent water inlet volume according to the water inlet volume deviation parameter.

[0094] In this embodiment, the washing machine divides the total water intake into two water intakes, and determines the deviation between the actual water intake and the theoretical water intake according to the pre-water intake, and calculates the deviation parameter, and adjusts the subsequent water intake according to the deviation parameter, so that after the washing machine takes in water according to the two water intakes, the actual water intake is closer to the total water intake. The total water intake can be the water intake selected by the user, or the water intake automatically set by the washing machine according to the clothes.

[0095] The washing machine can detect the weight of the laundry to be washed and determine the total water intake according to the weight of the laundry. If the weight of the laundry and the total water intake have a multiplier relationship, the required total water intake (hereinafter referred to as the total water intake) can be directly obtained according to the weight of the laundry.

[0096] For example, the washing machine determines the total water intake and the pre-water intake according to the weight of the laundry to be washed; wherein the pre-water intake is 20% to 70% of the total water intake, or the pre-water intake is a fixed value, and the washing machine controls the total water intake minus the pre-water intake to obtain the subsequent water intake, and then performs the pre-water intake process according to the pre-water intake, and after the pre-water intake process is completed, detects the actual water intake of the washing tub, determines the water intake deviation parameter according to the actual water intake and the corresponding theoretical water intake, and adjusts the subsequent water intake according to the water intake deviation parameter.

[0097] In a preferred embodiment, the total water intake is determined by integrating information such as the material of the clothing, such as determining the total water intake based on the material, weight, and style of the clothing.

[0098] For example, a washing machine includes an RFID reader, which identifies an RFID electronic tag on the laundry. The RFID electronic tag stores material information, weight information, and style information of the laundry.

[0099] Embodiment 7

[0100] In the seventh embodiment, the washing machine sets the total water inflow and the pre-water inflow, performs the pre-water inflow process of filling the washing tub with the pre-water inflow, and detects the actual water inflow of the washing tub after the pre-water inflow, determines the water inflow deviation parameter according to the actual water inflow and the pre-water inflow, and adjusts the subsequent water inflow according to the water inflow deviation parameter. The total water inflow can be selected by the user or automatically set by the washing machine.

[0101] The water inflow deviation parameter is obtained by the following formula:

[0102] μ=1-M S / M L ; Wherein, μ is the water inlet deviation parameter, M SM is the actual water volume in the washing tub detected by the washing machine after the pre-water filling process is completed. L is the pre-water intake.

[0103] In this solution, the subsequent water inflow is adjusted according to the water inflow deviation parameter to ensure that the final actual water inflow is closer to the total water inflow.

[0104] Among them, the washing machine determines the total water intake according to the weight of the clothes to be processed, and calculates the adjusted subsequent water intake through the following formula.

[0105] M E =(M Z -M Y )*(1+μ); where M E is the adjusted subsequent water inflow, M Z is the total water intake, M Y is the pre-water intake.

[0106] In this solution, the theoretical value of the subsequent water inflow is obtained by subtracting the pre-water inflow from the total water inflow, and then the value is corrected to obtain the adjusted subsequent water inflow. The washing machine performs the water inflow process according to the adjusted subsequent water inflow, ensuring that the actual water inflow is closer to the theoretical value.

[0107] Embodiment 8

[0108] In Example 8, considering that even if the subsequent water inlet volume is adjusted, after the washing machine executes the corresponding water inlet process according to the subsequent water inlet volume, the actual water inlet volume of the washing machine still deviates from the total water inlet volume, so the washing machine needs to perform a water replenishment process after the second water inlet process is completed.

[0109] Specifically, the washing machine is adjusted according to the subsequent water intake M E Execute a secondary water inflow process, and after the secondary water inflow process is completed, detect the actual water inflow volume of the washing tub, and calculate the difference between the actual water inflow volume and the theoretical water inflow volume corresponding to the secondary water inflow process (the total water inflow volume set by the washing machine), and execute the corresponding water replenishment process according to the difference.

[0110] In this embodiment, after the washing machine controls the execution of the second water inlet, it continues to detect the difference between the actual water inlet amount and the theoretical water inlet amount, and determines whether to execute the water replenishment process and the water replenishment amount corresponding to the water replenishment process based on the difference.

[0111] Specifically, the washing machine determines the water replenishment amount according to the difference between the actual water intake amount corresponding to the secondary water intake process and the corresponding theoretical water intake amount, and performs the corresponding water replenishment process according to the water replenishment amount.

[0112] Preferably, the washing machine is according to formula M b =(M Z –Mf )*(1+μ), correct the water replenishment amount, and replenish water according to the corrected water replenishment amount, wherein M b is the corrected water replenishment amount, M f It is the actual total water inflow volume of the washing tub detected after the secondary water inflow process is completed.

[0113] In the above scheme, the amount of water replenishment is also subjected to deviation correction calculation to reduce the deviation between the actual water intake and the total water intake.

[0114] In a preferred control method: after the washing machine completes the secondary water inflow process, it detects the actual water inflow into the washing tub, and compares the actual water inflow with the corresponding theoretical water inflow to determine whether the actual water inflow is less than the theoretical water inflow. If the judgment result is yes, the control executes the water replenishment process, otherwise the control ends.

[0115] In another control scheme: after the washing machine completes the secondary water inlet process, it detects the actual water inlet volume of the washing tub, and compares the actual water inlet volume with the corresponding theoretical water inlet volume to determine whether the difference between the actual water inlet volume and the theoretical water inlet volume is greater than the target water inlet volume. If the judgment result is yes, the control executes the water replenishment process, otherwise the control ends.

[0116] The washing machine can control the water intake through a flow meter during the water replenishment process, or the washing machine can control the water intake according to the detected motor data, thereby achieving accurate control of the water intake.

[0117] Embodiment 9

[0118] In the ninth embodiment, the principle of automatic water inflow of the washing machine and the principle of detecting the actual water inflow are explained.

[0119] The washing machine includes a flow meter, and during the pre-water inlet process, the washing machine controls the pre-water inlet amount of water into the washing tub through the flow meter. That is, the washing machine controls the required amount of water into the washing tub according to the flow rate detected by the flow meter, such as the pre-water inlet amount.

[0120] The washing machine detects the weight of the laundry before water is introduced, and after the pre-water introduction process is completed, detects the load weight of the washing tub, and determines the actual water intake of the washing tub according to the difference between the load weight of the washing tub and the weight of the laundry.

[0121] The weight of the laundry can be detected by a motor or by identifying the laundry information through an RFID reader; and the weight of the washing tub load after the pre-water filling process is completed is detected by a motor. Specifically, the washing machine controls the motor to detect the weight of the washing tub load: when the washing machine controls the inner tub to rotate to a set speed, the motor is powered off, the output signal of the motor is detected, and the weight of the washing tub load is determined according to the output signal.

[0122] The washing machine detects the weight of the load through the motor. The process of the washing machine detecting the weight of the load of the washing tub includes: when the washing machine controls the washing tub to rotate to a set speed, the motor is controlled to be powered off, the output signal of the motor is detected, and the weight of the load of the washing tub is determined according to the output signal. Specifically, the motor can be driven to drive the washing tub to reach a set speed, and then the motor is controlled to be powered off, and the number of pulses of the pulse signal output by the motor during the period from the set rotation to the complete stop of the washing tub after the motor is powered off is recorded, and the corresponding relationship between the number of pulses and the weight of the clothes is used to determine the weight of the load in the washing tub through the number of pulses.

[0123] Embodiment 10

[0124] In this embodiment, the washing machine is a non-hole inner barrel washing machine, that is, the washing machine includes a rotatable washing barrel, and the washing barrel contains washing water during the washing process. The water inlet control method of the washing machine includes: the washing machine performs a pre-water inlet process, and after the pre-water inlet process, detects the actual water inlet amount of the washing barrel, determines the water inlet amount deviation parameter according to the actual water inlet amount and the theoretical water inlet amount corresponding to the pre-water inlet process, and adjusts the subsequent water inlet amount according to the water inlet amount deviation parameter. In view of the problem that it is difficult to use a traditional pressure water level sensor to detect and control the water inlet amount in the existing non-hole inner barrel washing machine, this embodiment proposes a water inlet control method that uses motor weighing and water inlet in batches to correct the water inlet deviation, so as to accurately control the water inlet amount of the washing machine.

[0125] See also Figure 3 As shown, the steps of controlling water inlet of the washing machine in this embodiment are provided:

[0126] S1, the washing machine detects the weight of the laundry;

[0127] S2, the washing machine sets the total water intake and pre-water intake according to the weight of the laundry;

[0128] S3, the washing machine performs a pre-water filling process of filling the washing tub with the pre-water filling amount of water;

[0129] S4. After the pre-water inflow process is completed, the actual water inflow volume of the washing tub is detected, a water inflow volume deviation parameter is determined according to the actual water inflow volume and the pre-water inflow volume, and the subsequent water inflow volume is adjusted according to the water inflow volume deviation parameter;

[0130] S5, the washing machine performs a corresponding secondary water inflow process;

[0131] S6, the washing machine determines the water replenishment amount according to the difference between the actual total water inflow detected after the secondary water inflow process and the total water inflow set for the washing machine;

[0132] S6. The washing machine executes the corresponding water replenishment process.

[0133] The above 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, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A method for controlling water inlet of a washing machine, wherein the washing machine does not have an additional flow meter, the washing machine comprises a washing tub, and the washing tub independently holds washing water during the washing process, wherein: The control method comprises: in the water inlet stage of the washing machine, the washing tub is continuously filled with water, the washing machine controls the motor driving the washing tub to rotate, detects the motor parameters, determines the load weight of the washing tub, and controls the water inlet process of the washing tub according to the load weight of the washing tub; During the continuous water inflow of the washing tub, the washing machine obtains the load weight of the washing tub at intervals for multiple times. After obtaining the load weight of the washing tub each time, the washing machine determines whether the current water inflow reaches the target water inflow according to the load weight of the washing tub. If the judgment result is yes, the washing machine controls the water inflow process to end, otherwise the washing machine controls to obtain the load weight of the washing tub again after the set interval. After obtaining the load weight of the washing tub each time, the washing machine determines whether the difference between the current water inlet volume and the target water inlet volume is less than the set threshold. If the judgment result is yes, the washing machine executes the water inlet process and the process of obtaining the load weight of the washing tub at intervals until it is determined that the water inlet volume reaches the target water inlet volume. Otherwise, the washing machine controls the washing tub to keep filling with water continuously.

2. A method for controlling water inflow of a washing machine according to claim 1, characterized in that: The washing machine calculates the difference between the current water inflow and the target water inflow each time after obtaining the load weight of the washing tub, and determines the time interval for obtaining the load weight of the washing tub next time according to the difference.

3. A method for controlling water inflow of a washing machine according to claim 1, characterized in that: During the continuous water inflow into the washing tub, the washing machine detects the weight change of the washing tub load, calculates the water inflow rate, and determines the remaining water inflow time of the washing tub according to the water inflow rate.

4. A method for controlling water inflow of a washing machine according to claim 3, characterized in that: During the continuous water filling of the washing tub, the washing machine obtains the load weight of the washing tub at intervals, calculates the difference between the two adjacent load weights of the washing tub obtained, and divides the difference by the corresponding time interval to obtain the water filling rate; the washing machine divides the remaining water filling amount of the washing tub by the water filling rate to obtain the remaining water filling time of the washing tub.

5. A method for controlling water inflow of a washing machine according to claim 1, characterized in that: During the water inlet stage, the washing machine performs the water inlet process and the process of obtaining the washing tub load weight at intervals until the washing tub reaches the target water inlet volume; wherein the washing machine determines the difference between the actual water inlet volume and the target water inlet volume according to the washing tub load weight obtained each time, and determines the water inlet duration of the next water inlet process according to the difference.

6. A method for controlling water inflow of a washing machine according to claim 5, characterized in that: The washing machine determines the water inflow rate according to the difference between the washing tub load weights obtained twice adjacently and the corresponding time interval, and divides the difference between the target water inflow volume and the current water inflow volume of the washing tub by the water inflow rate to obtain the water inflow duration of the next water inflow process.

7. A method for controlling water inflow of a washing machine according to any one of claims 1 to 6, characterized in that: After the water inflow process of the washing machine is completed, the load weight of the washing tub is obtained, the deviation rate between the actual water inflow and the target water inflow is calculated, and it is determined whether the deviation rate is within the set range. If the judgment result is yes, the washing machine continues to execute the washing program, otherwise the washing machine executes the water replenishment process according to the deviation value between the actual water inflow and the target water inflow.

8. A method for controlling water inflow of a washing machine according to claim 7, characterized in that: The washing machine divides the actual water intake by the total water intake time to obtain the water intake rate, and divides the deviation by the water intake rate to obtain the water replenishment time.

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