Unbalance limit value calibration method, washing machine control method, washing machine and medium

Abstract

The invention discloses an unbalance limit value calibration method, a washing machine control method, a washing machine and a medium. The unbalance limit value calibration method comprises the steps of obtaining an unbalance value detection value of a motor at a preset rotating speed in an empty barrel state; based on the unbalance detection value and an unbalance reference value, the tension loss condition of the belt is determined, and the unbalance reference value is the unbalance value of the belt at the preset rotating speed in the initial state in the empty barrel state; based on the tension loss condition, whether the belt has a damage risk or not is determined; and under the condition that the belt has no damage risk, updating an unbalance limit value according to the tension loss condition of the belt. According to the method, the basic parameters are regularly corrected, and the probability of vibration displacement caused by detection errors due to belt tension attenuation is reduced for changes caused by the basic parameters due to belt attenuation.

Description

Technical Field

[0001] The invention relates to the technical field of dehydration of washing machines, and in particular to an unbalance limit calibration method, a washing machine control method, a washing machine and a medium. Background Art

[0002] In order to reduce costs, existing washing machines use BLDC and CIM motors, belts and pulleys to control the rotation of the washing machine. This transmission method has relatively high requirements on the coordination of the motor, belt and pulley.

[0003] At present, in drum washing machines, non-direct drive motors use a pulley and belt transmission method. Over time, the belt tension will decay, causing the washing machine to vibrate and displace, giving users a bad experience.

[0004] The shortcoming of the existing technology is that the imbalance value measured at a fixed speed is compared with the imbalance in the data table, or the threshold calculated by the mathematical model to determine whether the current imbalance can safely enter the next step. In this way, the belt tension will decay at different times and times of use. There is a deviation between the current measured value and the existing mathematical model or fixed data table, which may lead to misjudgment and pose a certain risk. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art. To achieve the above purpose, an unbalance limit calibration method, a washing machine control method, a washing machine and a medium are adopted to solve the problems raised in the above background technology.

[0006] In a first aspect, the present application provides a method for calibrating an unbalance limit value of a clothes processing device, comprising the following steps:

[0007] Obtain the unbalance detection value of the motor at a preset speed in an empty barrel state;

[0008] Determine the tension loss of the belt based on the imbalance detection value and the imbalance reference value, wherein the imbalance reference value is the imbalance value of the belt at the preset speed in the initial state when the belt is in an empty barrel state;

[0009] Based on the tension loss, determining whether the belt is at risk of damage;

[0010] When there is no risk of damage to the belt, the unbalance limit value is updated according to the tension loss of the belt.

[0011] As a further technical solution of the present invention: the operation of obtaining the unbalanced value detection value of the motor in the empty barrel state includes:

[0012] Perform multiple tests in the empty barrel state to obtain multiple initial values ​​for imbalance detection;

[0013] The unbalance detection value is determined as an average value of a plurality of the unbalance detection initial values.

[0014] As a further technical solution of the present invention: when there is no risk of loss of the belt, the operation of updating the unbalance limit value according to the tension loss of the belt includes:

[0015] When there is no risk of damage to the belt, the unbalance limit is updated to a value smaller than the unbalance limit according to the tension loss of the belt; wherein, the more severe the tension loss of the belt is, the smaller the updated unbalance limit is.

[0016] As a further technical solution of the present invention: the operation of determining the tension loss of the belt based on the imbalance detection value and the imbalance reference value includes:

[0017] Determining the tension loss of the belt based on the ratio of the imbalance detection value to the imbalance reference value;

[0018] The operation of updating the unbalance limit value to a value less than the unbalance limit value according to the tension loss of the belt when there is no risk of loss of the belt comprises:

[0019] In the case where there is no risk of loss of the belt, the updated unbalance limit value is the product of the original unbalance limit value and the ratio.

[0020] As a further technical solution of the present invention: the original unbalance limit value is obtained by fitting function or table lookup;

[0021] The fitting function is:

[0022] Ubo=k*Wlevel+Ubinit;

[0023] Among them, Ubo represents the original unbalance limit value at the corresponding speed, Wlevel represents the preset maximum unbalance weight at the corresponding speed, Ubinit represents the initial unbalance value of the linear fitting when the eccentricity is zero at the corresponding speed; k represents the slope under the corresponding weighing, and the larger the weighing, the smaller the slope.

[0024] As a further technical solution of the present invention: the operation of obtaining the unbalanced value detection value of the motor in the empty barrel state includes:

[0025] When the preset operation cycle is reached, the unbalanced value detection value of the motor is obtained in the empty barrel state.

[0026] As a further technical solution of the present invention: the method further comprises:

[0027] In the event that the belt is at risk of damage, an alarm message is generated and issued.

[0028] In a second aspect, the present application provides a washing machine control method, comprising:

[0029] The washing machine dehydration control is performed based on the unbalance limit value, wherein the unbalance limit value is obtained based on the unbalance limit value calibration method described in any one of the above schemes.

[0030] In a third aspect, the present application provides a washing machine, which is controlled using the above-mentioned washing machine control method.

[0031] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements an imbalance limit calibration method as described in any of the above schemes.

[0032] Compared with the prior art, the present invention has the following technical effects:

[0033] By adopting the above technical solution, the imbalance limit value is updated according to the tension loss of the belt, so as to ensure the accuracy of the imbalance limit value and avoid the clothing care equipment running at an excessively high speed, thereby causing severe vibration and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0035] Figure 1 A schematic diagram of the steps of the unbalance limit calibration method according to the embodiment disclosed in the present application;

[0036] Figure 2 The present invention discloses a flowchart of an unbalance limit calibration method according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Please refer to Figure 1 and Figure 2 In a first aspect, the present application provides a method for calibrating an unbalance limit of a clothing processing device, which can be applied to a control panel of the clothing processing device, wherein the clothing processing device is a clothing processing device having a rotating inner barrel, such as a drum washing machine and a pulsator washing machine. The method comprises the following steps S1-S4:

[0039] Step S1, obtaining the unbalanced value detection value of the motor at a preset speed in an empty barrel state.

[0040] First, the speed involved in this application document refers to the speed of the inner drum of the clothing processing device, such as the speed of the drum in the drum washing machine. The means for obtaining the imbalance detection value can be realized by existing technologies, for example, the above-mentioned preset speed is set to any value from 90 to 140 rpm, so that the washing machine runs at the preset speed in the empty drum state, and then the motor detects the imbalance value detection value at this time.

[0041] In order to ensure the accuracy of the unbalanced value detection value, the average value can be obtained by taking an average value through multiple measurements, and the obtained average value is used as the unbalanced value detection value finally obtained in step S1. That is, the operation of obtaining the unbalanced value detection value of the motor in the empty barrel state in step S1 can include:

[0042] Perform multiple tests in the empty barrel state to obtain multiple initial values ​​for imbalance detection;

[0043] The unbalance detection value is determined as an average value of a plurality of the unbalance detection initial values.

[0044] For example, in order to accurately obtain the unbalanced value detection value of the motor in the empty barrel state, multiple detection operations are first performed;

[0045] The motor runs at the above preset speed in the empty barrel state (i.e. no load or light load), and the motor performs multiple imbalance detections. Each detection will obtain an initial imbalance detection value, which reflects the slight imbalance of the motor in the current state. After collecting multiple initial imbalance detection values, these initial values ​​are mathematically processed to calculate their average value. This average value is identified as the imbalance value detection value of the motor in the empty barrel state.

[0046] Step S2: determining the tension loss of the belt based on the imbalance detection value and the imbalance reference value, wherein the imbalance reference value is the imbalance value of the belt at the preset speed in the initial state under the empty barrel state.

[0047] First, the imbalance reference value is the imbalance value of the belt at the preset speed in the initial state in the empty barrel state. For example, the control panel of the clothing processing equipment can operate at the preset speed during the commercial inspection of the clothing processing equipment after production to obtain the imbalance detection value at this time as the imbalance reference value; or after the clothing processing equipment is replaced with a new belt, it can actively operate at the preset speed to re-obtain the imbalance detection value at this time as the imbalance reference value.

[0048] It is understandable that as a belt that transmits power in a clothing processing device, such as a belt that connects a motor and a pulley in a drum washing machine, the tension of the belt will be lost as the clothing processing device is used for a long time. The applicant has found that the unbalance detection value of the motor is different under different tension loss conditions of the belt, so in the embodiment of the present application, the tension loss of the belt is determined by the unbalance reference value and the detected unbalance detection value (such as the difference or ratio between the two).

[0049] Step S3: Determine whether the belt is at risk of damage based on the tension loss condition.

[0050] Obviously, the more serious the tension loss of the belt is, the higher the risk of the belt being damaged. In the embodiment of the present application, as mentioned above, the tension loss of the belt can be reflected based on the ratio, difference or other relevant values ​​of the detected imbalance detection value and the balance reference value. If the above ratio is less than a certain threshold, it is determined that the belt is at risk of damage. The specific implementation means can be set by those skilled in the art according to actual needs.

[0051] Step S4: When there is no risk of damage to the belt, update the unbalance limit value according to the tension loss of the belt.

[0052] It is well known to those skilled in the art that, when a laundry processing device such as a drum washing machine is dehydrating, it will perform weighing detection and eccentricity detection at a low speed to obtain weighing detection values ​​and eccentricity detection values. The eccentricity threshold corresponding to different rotation speeds is determined by the obtained weighing detection values; the detected eccentricity detection values ​​are then compared with the unbalance limit of the drum washing machine to determine whether the secondary eccentricity state can reach the target rotation speed, thereby controlling the dehydration speed of the drum washing machine.

[0053] In the embodiment of the present application, the above step S4 may be:

[0054] When there is no risk of belt damage, the unbalance limit is updated to a value smaller than the unbalance limit according to the tension loss of the belt; the more serious the tension loss of the belt, the smaller the unbalance limit after the update.

[0055] Those skilled in the art will understand that the more severe the belt tension loss is, the higher the possibility of vibration in the clothing processing device is. Therefore, the more severe the belt tension loss is, the smaller the imbalance limit needs to be updated to avoid severe vibration and noise in the clothing processing device due to excessively high dehydration speed.

[0056] As an optional implementation scheme, the above step S2 may include:

[0057] Determine the tension loss of the belt based on the ratio of the imbalance detection value obtained in step S1 to the imbalance reference value;

[0058] In this case, step S4 may be:

[0059] In the case where there is no risk of belt loss, the updated unbalance limit is the product of the original unbalance limit and the ratio.

[0060] In the present application, the original imbalance limit refers to the imbalance limit corresponding to the belt in the aforementioned initial state; it is well known to those skilled in the art that different imbalance weights and rotation speeds correspond to different imbalance limits. Among common methods, the imbalance limit can be directly recorded in the form of a numerical table in the control board chip of the clothing processing equipment, or the imbalance limit under the corresponding imbalance weight and rotation speed can be determined by a fitting function of the imbalance limit.

[0061] Therefore, in the implementation manner of the present application, the original imbalance limit value can be obtained through a fitting function or a table lookup; for example, the control board chip of the clothing processing equipment records the original imbalance limit values ​​corresponding to different imbalance weights and rotation speeds, then the recorded imbalance limit value can be updated to: the product of the original recorded original imbalance limit value and the aforementioned ratio.

[0062] As another implementation manner, the original unbalance limit value may be obtained through a fitting function, and the fitting function may be:

[0063] Ubo=k*Wlevel+Ubinit;

[0064] Among them, Ubo represents the original unbalance limit value at the corresponding speed, Wlevel represents the preset maximum unbalance weight at the corresponding speed, Ubinit represents the initial unbalance value of the linear fitting when the eccentricity is zero at the corresponding speed; k represents the slope under the corresponding weighing, and the larger the weighing, the smaller the slope.

[0065] In actual products, the above slope k can be calculated using the following formula:

[0066] k=a2*in 2 +a1*in+a0;

[0067] Wherein, in represents the weight detected when the clothing care device is dehydrated, a2, a1, and a0 are all quadratic linear regression parameters, and their specific values ​​can be set according to actual conditions, but it should be ensured that the larger the weight, the smaller the slope k.

[0068] It should be noted that the imbalance limit updated by the fitting function can still be a function, such as:

[0069] Ublimit=(k*Wlevel+Ubinit)*l;

[0070] Wherein, Ublimit represents the updated imbalance limit value, and l represents the ratio of the aforementioned imbalance detection value to the balance reference value.

[0071] By adopting the above technical solution, the imbalance limit value is updated according to the tension loss of the belt, so as to ensure the accuracy of the imbalance limit value and avoid the clothing care equipment running at an excessively high speed, thereby causing severe vibration and noise.

[0072] In actual products, the method for calibrating the imbalance limit of the clothing processing device provided in the present application can be performed periodically, and the period can be a preset user usage time or a preset number of user usages. Step S1 in the embodiment of the present application can be

[0073] When the preset operation cycle is reached, the unbalanced value detection value of the motor is obtained in the empty barrel state.

[0074] For example, after the clothing processing device has been operated for 50 times, the imbalance detection value of the motor is obtained in the empty barrel state, and the imbalance limit calibration method for the clothing processing device provided in the present application is fully executed.

[0075] In addition, different from the above-mentioned step S4, when step S3 determines that there is a risk with the belt, the control panel of the clothing processing equipment can generate an alarm message and prompt the user to replace the belt through screen prompts, buzzer alarms, APP prompts, etc.; thereby effectively reducing the risk of speed loss, belt slippage and falling off, and improving the stability and safety of the machine operation.

[0076] In order to fully introduce the unbalanced limit calibration method of this application, the following Figure 2 Let’s introduce an example:

[0077] Step 1. After the clothes treatment device is powered on for the first time, the running program is initialized, the initial value t=0 is set, the cycle T=50 times is set, and a judgment is made once after each operation, t%T==0; if it is not equal to 0, the number of times the current user uses t=t+1 is recorded, and the normal program operation is entered; if it is equal to 0, step 2 is entered;

[0078] Step 2, enter the imbalance detection, the value is U1;

[0079] Step 3, enter the weighing IN test, the value is IN;

[0080] Step 4: Determine whether the bucket is empty based on the weighing IN. If it is not empty, prompt the user to take out the clothes and jump to Step 2; if it is empty, proceed to the next step;

[0081] Step 5, detect the imbalance Ub n times, and weigh In n times;

[0082] Step 6. Calculate the belt tension loss ratio l based on the baseline imbalance UB;

[0083] Step 7, determine whether the belt tension loss ratio l is greater than the belt loss safety ratio ls. If not, remind the user to replace the belt and jump to the end;

[0084] Step 8. If it is greater, update the imbalance limit through the following function:

[0085] Ubo=k*Wlevel+Ubinit;

[0086] k=a2*in 2 +a1*in+a0;

[0087] Step 9. Update the updated imbalance limit value to the program parameter table and save it, and enable it in the next program run.

[0088] The calculation formula of the belt tension loss ratio can be:

[0089]

[0090] Among them, ui represents the imbalance value detected by the motor, i represents the number of times, and ubase represents the imbalance reference value of the belt in the initial state.

[0091] In addition, the specific steps for obtaining the safety loss ratio may include:

[0092] Based on a large number of experiments on the loss results of the single platform machine belt durability cycle, a mean value within the average range is obtained, and the formula is:

[0093]

[0094] Where, ls represents the safety loss ratio before the belt slips, falls off or is damaged, m represents the number of machines in the endurance test, and li is the current belt tension loss ratio calculated based on the belt tension loss ratio l formula.

[0095] When l>0.8*ls in formula (1), the user is reminded to replace the belt.

[0096] In a second aspect, the present application provides a washing machine control method, comprising:

[0097] The washing machine dehydration control is performed based on the unbalance limit value, wherein the unbalance limit value is obtained based on the unbalance limit value calibration method.

[0098] It can be understood that, based on the known imbalance limit value, the clothing processing device can perform dehydration control according to the existing dehydration control method, and the specific means will not be repeated.

[0099] In a third aspect, the present application provides a washing machine, which is controlled using the aforementioned washing machine control method.

[0100] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned imbalance limit calibration method.

[0101] In the specific implementation steps, the unbalance limit calibration method obtained above is used as a program to implement the unbalance limit calibration method described above. By running this program, the tension loss of the belt can be accurately determined automatically based on the unbalance reference value at the preset speed when the belt is initially installed in the empty barrel state, and the unbalance detection value measured in the actual operation cycle. Such a design makes the calibration process of the unbalance limit more automated, accurate and efficient.

[0102] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents, and all should be included within the scope of protection of the present invention.

Claims

1. A method for calibrating an unbalance limit value of a clothes processing device, characterized in that: include: Obtain the unbalance detection value of the motor at a preset speed in an empty barrel state; Determine the tension loss of the belt based on the imbalance detection value and the imbalance reference value, wherein the imbalance reference value is the imbalance value of the belt at the preset speed in the initial state when the belt is in an empty barrel state; Based on the tension loss, determining whether the belt is at risk of damage; When there is no risk of damage to the belt, the unbalance limit value is updated according to the tension loss of the belt.

2. The unbalance limit calibration method according to claim 1, characterized in that: The operation of obtaining the unbalanced value detection value of the motor in the empty barrel state includes: Perform multiple tests in the empty barrel state to obtain multiple initial values ​​for imbalance detection; The unbalance detection value is determined as an average value of a plurality of the unbalance detection initial values.

3. The unbalance limit calibration method according to claim 1, characterized in that: When there is no risk of loss of the belt, the operation of updating the unbalance limit value according to the tension loss of the belt includes: When there is no risk of damage to the belt, the unbalance limit is updated to a value smaller than the unbalance limit according to the tension loss of the belt; wherein, the more severe the tension loss of the belt is, the smaller the updated unbalance limit is.

4. The unbalance limit calibration method according to claim 3, characterized in that: The operation of determining the tension loss of the belt based on the imbalance detection value and the imbalance reference value includes: Determining the tension loss of the belt based on the ratio of the imbalance detection value to the imbalance reference value; The operation of updating the unbalance limit value to a value less than the unbalance limit value according to the tension loss of the belt when there is no risk of loss of the belt comprises: In the case where there is no risk of loss of the belt, the updated unbalance limit value is the product of the original unbalance limit value and the ratio.

5. The unbalance limit calibration method according to claim 4, characterized in that: The original unbalance limit value is obtained by fitting function or table lookup; The fitting function is: Ubo=k*Wlevel+Ubinit; Among them, Ubo represents the original unbalance limit value at the corresponding speed, Wlevel represents the preset maximum unbalance weight at the corresponding speed, Ubinit represents the initial unbalance value of the linear fitting when the eccentricity is zero at the corresponding speed; k represents the slope under the corresponding weighing, and the larger the weighing, the smaller the slope.

6. The unbalance limit calibration method according to any one of claims 1 to 5, characterized in that: The operation of obtaining the unbalanced value detection value of the motor in the empty barrel state includes: When the preset operation cycle is reached, the unbalanced value detection value of the motor is obtained in the empty barrel state.

7. The unbalance limit calibration method according to any one of claims 1 to 5, characterized in that: The method further comprises: In the event that the belt is at risk of damage, an alarm message is generated and issued.

8. A washing machine control method, characterized in that: include: The dehydration control of the washing machine is performed based on the unbalance limit value, wherein the unbalance limit value is obtained based on the unbalance limit value calibration method according to any one of claims 1 to 8.

9. A washing machine, characterized in that: The washing machine is controlled using the washing machine control method according to claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, an unbalance limit calibration method as described in any one of claims 1 to 7 is implemented.

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