CN116575215B - Washing machine load weighing method and washing machine - Google Patents

Washing machine load weighing method and washing machine Download PDF

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Publication number
CN116575215B
CN116575215B CN202310859735.9A CN202310859735A CN116575215B CN 116575215 B CN116575215 B CN 116575215B CN 202310859735 A CN202310859735 A CN 202310859735A CN 116575215 B CN116575215 B CN 116575215B
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China
Prior art keywords
weighing
washing machine
rotating speed
preset
acceleration
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CN116575215A (en
Inventor
林子豪
谢建军
郑明星
高辉
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention provides a washing machine load weighing method and a washing machine, and belongs to the technical field of washing machines. The method comprises the following steps: controlling the washing machine to accelerate to a first target rotating speed by a first acceleration strategy and acquiring an eccentric value at the first target rotating speed; if the eccentric value does not meet the condition, controlling the washing machine to freely reduce the speed from the first target rotating speed to a first preset rotating speed, calculating the reducing time t1, calculating a first actual weighing coefficient according to the average power and the time t1, and determining the actual load weight, or if the eccentric value meets the condition, controlling the washing machine to accelerate from the first target rotating speed to the overshoot rotating speed by a second accelerating strategy, controlling the washing machine to reduce from the overshoot rotating speed to a second preset rotating speed by the first reducing strategy, calculating a second actual weighing coefficient according to the torque change rate in the process of accelerating to the overshoot rotating speed and the duration of the reducing stage in the process of reducing from the overshoot rotating speed to the second preset rotating speed, and determining the actual load weight based on the second actual weighing coefficient.

Description

Washing machine load weighing method and washing machine
Technical Field
The invention relates to the technical field of washing machines, in particular to a washing machine load weighing method and a washing machine.
Background
Washing machines are relatively large laundry products currently on the market, and are accepted by the general public because they are capable of washing a wide variety of laundry. The degree of automation of washing machines is increasing, and the state of the public washing is gradually improved. The automatic throwing device has larger and larger duty ratio in the washing machine, and the consumption of the detergent and the softener is distributed by means of automatic weighing of the washing machine, so that the requirement on the weighing precision of the drum washing machine is higher and higher.
However, due to the problems of installation errors before delivery and aging of the washing machine after a longer service life, the washing machine can not accurately call washing parameters when washing by a program of a weighing function, and the washing effect is not ideal.
Disclosure of Invention
In order to overcome the problems in the related art, the embodiment of the invention provides a washing machine load weighing method and a washing machine.
The first aspect of the embodiment of the invention provides a method for weighing a load of a washing machine, which comprises the following steps:
responding to a load weighing instruction of the washing machine, controlling the washing machine to accelerate to a first target rotating speed according to a first acceleration strategy and operating for a corresponding time period at the first target rotating speed;
Acquiring an eccentric value at a first target rotating speed;
if the eccentricity value at the first target rotation speed does not meet the preset condition, controlling the washing machine to freely reduce from the first target rotation speed to the first preset rotation speed, calculating the time t1 required for reducing from the first target rotation speed to the first preset rotation speed, calculating a first actual weighing coefficient according to the average power and the time t1 at the stepwise target rotation speed in the first acceleration strategy, and determining the actual load weight based on the first actual weighing coefficient, or,
if the eccentric value at the first target rotating speed meets the preset condition, the washing machine is controlled to accelerate to the overshoot rotating speed from the first target rotating speed according to the preset second target rotating speed by a second acceleration strategy, the washing machine is controlled to decelerate to the second preset rotating speed from the overshoot rotating speed by a deceleration strategy, a second actual weighing coefficient is calculated according to the torque change rate in the process of accelerating to the overshoot rotating speed and the duration of the deceleration stage in the process of decelerating to the second preset rotating speed from the overshoot rotating speed, and the actual load weight is determined based on the second actual weighing coefficient.
In the above technical solution, the acceleration in the second acceleration strategy is greater than the acceleration in the first acceleration strategy.
In the above technical solution, the method for determining the actual load weight based on the first actual weighing coefficient includes:
comparing the first actual weighing coefficient with a preset { first initial weighing coefficient-weight } relation corresponding table, wherein the preset { first initial weighing coefficient-weight } relation corresponding table comprises a plurality of groups of first initial weighing coefficients, and each group of first initial weighing coefficients corresponds to a load weight value:
if the first actual weighing coefficient is smaller than a preset minimum first initial weighing coefficient, determining that the current load weight is smaller than a load weight value corresponding to the preset minimum first initial weighing coefficient;
if the first actual weighing coefficient is between two adjacent preset first initial weighing coefficients, determining that the current load weight is between load weight values corresponding to the two adjacent preset first initial weighing coefficients respectively;
if the first actual weighing coefficient is larger than the preset maximum first initial weighing coefficient, determining that the current load weight is larger than a load weight value corresponding to the preset maximum first initial weighing coefficient.
In the above technical solution, the first acceleration strategy includes n acceleration stages, where n is an integer greater than or equal to 1, and the staged target rotation speed is a target rotation speed corresponding to each acceleration stage after acceleration, where the target rotation speed corresponding to the last acceleration stage is the first target rotation speed;
The load weighing method further comprises the following steps:
and collecting n average powers of the washing machine at n target rotating speeds, and calculating a first actual weighing coefficient based on the n average powers.
In the above technical solution, the method for controlling the washing machine to accelerate to the first target rotation speed with the first acceleration strategy and to operate for a corresponding period of time at the first target rotation speed includes:
the n acceleration phases are controlled to run at different accelerations.
In the above technical solution, the acceleration phase includes an acceleration operation phase and a steady speed operation phase that accelerates to a first target rotation speed; the method for controlling the washing machine to accelerate to the first target rotating speed according to the first acceleration strategy and to operate at the first target rotating speed for a corresponding period of time further comprises the following steps:
each of the n acceleration phases is controlled to run for the same duration.
In the above technical solution, the first acceleration strategy includes a first acceleration stage and a second acceleration stage that are sequentially executed;
the first acceleration stage comprises controlling the washing machine to run from the rotating speed 0 to the rotating speed n1 at the acceleration a1, and collecting the average power w1 of the washing machine running at the rotating speed n 1;
the second acceleration phase comprises controlling the washing machine to run from the speed n1 to the speed n2 at an acceleration a2, and collecting the average power w2 of the washing machine running at the speed n 2.
In the above technical solution, the method for determining the actual load weight based on the second actual weighing coefficient includes:
comparing the second actual weighing coefficient with a preset { second initial weighing coefficient-weight } relation corresponding table, wherein the preset { second initial weighing coefficient-weight } relation corresponding table comprises a plurality of groups of second initial weighing coefficients, and each group of second initial weighing coefficients corresponds to a load value;
if the second actual weighing coefficient is smaller than the preset minimum second initial weighing coefficient, determining that the current load weight is smaller than a load weight value corresponding to the preset minimum second initial weighing coefficient;
if the second actual weighing coefficient is between two adjacent preset second initial weighing coefficients, determining that the current load weight is between load weight values corresponding to the two adjacent preset second initial weighing coefficients respectively;
if the second actual weighing coefficient is larger than the preset maximum second initial weighing coefficient, determining that the current load weight is larger than a load weight value corresponding to the preset maximum second initial weighing coefficient.
In the above technical solution, the deceleration strategy includes a first deceleration stage for freely decelerating from the overshoot speed to a second target speed and a second deceleration stage for freely decelerating from the second target speed to a second preset speed, wherein the second target speed is greater than the first target speed;
The weighing method further comprises the following steps: calculating time t3 required by the washing machine when the washing machine freely decelerates from the second target rotating speed to the second preset rotating speed, calculating a second actual weighing coefficient according to the torque change rate in the second acceleration strategy and the time t3, and determining the actual load weight based on the second actual weighing coefficient; or alternatively
The weighing method further comprises the following steps: the time t2 required by the washing machine for freely reducing from the overshoot rotation speed to the second target rotation speed and the time t3 required by the washing machine for freely reducing from the second target rotation speed to the second preset rotation speed are calculated, a second actual weighing coefficient is calculated according to the torque change rate in the second acceleration strategy and the time t3 and t2, and the actual load weight is determined based on the second actual weighing coefficient.
In the above technical solution, under the condition that the eccentricity value at the first target rotation speed does not meet the preset condition, calculating a first actual weighing coefficient according to a first calculation formula;
a first calculation formula: first actual weighing factor= (w1+w2+ … +wn)/n/t 1;
under the condition that the eccentric value at the first target rotating speed meets the preset condition, calculating a second actual weighing coefficient according to a second calculation formula;
the second calculation formula: second actual weighing factor = T/T3;
Wherein w 1-wn are average power of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to drop from the first target rotating speed to the first preset rotating speed, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T3 is time required for the washing machine to freely drop from the second target rotating speed to the second preset rotating speed, and n is an integer greater than or equal to 1.
In the above technical solution, under the condition that the eccentricity value at the first target rotation speed does not meet the preset condition, calculating a first actual weighing coefficient according to a first calculation formula;
a first calculation formula: first actual weighing factor= (w1+w2+ … +wn)/n/t 1;
under the condition that the eccentric value at the first target rotating speed meets the preset condition, calculating a second actual weighing coefficient according to a second calculation formula;
the second calculation formula: second actual weighing factor = T/(T3-T2);
wherein w 1-wn are average powers of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to drop from the first target rotating speed to the first preset rotating speed, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T2 is time required for the washing machine to freely drop from the overshoot rotating speed to the second target rotating speed, T3 is time required for the washing machine to freely drop from the second target rotating speed to the second preset rotating speed, and n is an integer greater than or equal to 1.
In the above technical solution, a { first preset weighing coefficient-weight } relationship correspondence table for comparing with a first actual weighing coefficient to determine an actual load weight is set by using a first calculation formula;
and the { second preset weighing coefficient-weight } relation corresponding table is used for comparing the second preset weighing coefficient with the second actual weighing coefficient to determine the actual load weight, and a second calculation formula is adopted for setting.
In the above technical solution, the first preset rotation speed and the second preset rotation speed are rotation speed 0.
In a second aspect, the embodiment of the invention provides a washing machine, which comprises a washing program, and the dry load is weighed by adopting the load weighing method when the washing machine responds to a control instruction of the washing program.
In the above technical solution, the washing machine is a drum type washing machine.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
1. the embodiment of the invention provides a clothes weighing method, which can accurately judge the weight of clothes by collecting a plurality of parameters of the washing machine when the washing machine rotates at different stages when the weight of the clothes is weighed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram showing the rotational speed of a washing machine during weighing according to an embodiment of a method for weighing laundry in a washing machine according to the present invention;
FIG. 2 is a control flow chart of an embodiment of a laundry weighing method of a washing machine according to the present invention;
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
The existing washing machine can not accurately call washing parameters when washing due to the problems of installation errors before delivery, aging of the washing machine after a long service life and the like, and the problem of unsatisfactory washing effect is caused. The embodiment of the invention provides a clothes weighing method, which can accurately judge the weight of clothes by collecting a plurality of parameters of the washing machine during rotation when the weight of the clothes is weighed.
The technical solution of the present embodiment is described in detail below with reference to fig. 1, and the following implementation manners and embodiments may be combined with each other without conflict.
Examples
As shown in fig. 1, the present embodiment proposes a method for weighing a load of a washing machine, the method comprising:
responding to a load weighing instruction of the washing machine, controlling the washing machine to accelerate to a first target rotating speed n2 according to a first acceleration strategy, and running for a corresponding time period at the first target rotating speed n 2;
acquiring an eccentric value at a first target rotating speed n 2;
if the eccentricity value at the first target rotation speed n2 does not meet the preset condition, the washing machine is controlled to freely reduce from the first target rotation speed n2 to a first preset rotation speed, the time t1 required for reducing from the first target rotation speed to the first preset rotation speed is calculated, a first actual weighing coefficient is calculated according to the average power and the time t1 at the stepwise target rotation speed in the first acceleration strategy, and the actual load weight is determined based on the first actual weighing coefficient, or,
if the eccentric value of the first target rotating speed n2 meets the preset condition, the washing machine is controlled to accelerate to an overshoot rotating speed n4 from the first target rotating speed n2 according to a preset second target rotating speed n3 by a second acceleration strategy, the washing machine is controlled to decelerate to a second preset rotating speed from the overshoot rotating speed n4 by a deceleration strategy, a second actual weighing coefficient is calculated according to the torque change rate T in the process of accelerating to the overshoot rotating speed n4 and the duration of the deceleration stage in the process of decelerating to the second preset rotating speed from the overshoot rotating speed n4, and the actual load weight is determined based on the second actual weighing coefficient.
It should be noted that, in the first acceleration strategy according to the embodiment of the present invention, the staged target rotation speed may be accelerated once or multiple times, and may not be narrowly understood as multiple times.
Further, the acceleration in the second acceleration strategy in the embodiment of the present invention is greater than the acceleration in the first acceleration strategy.
It should be further noted that, in the embodiment of the present invention, the overshoot speed n4 is greater than the set second target speed n3, because a larger acceleration value is adopted in the second acceleration strategy, and meanwhile, the overshoot speed n4 in the embodiment of the present invention is determined based on the acceleration in the second acceleration strategy, the load weight in the washing machine, and the preset second target speed n3, and the overshoot speed values obtained when the load weights are different.
It should be further noted that the rotation speed in the embodiment of the present invention refers to the rotation speed of the washing tub in the washing machine.
Therefore, when the washing machine in the embodiment of the invention weighs the clothes, the weighing stage of the clothes in the washing machine is divided into two stages, and a clothes weighing mode is provided at each stage.
Specifically, in the first stage, the washing machine is controlled to accelerate to a first target rotation speed n2 according to a first acceleration strategy, and when the clothes in the washing machine are weighed in the embodiment of the invention, the first stage is set and a first weighing mode is provided under the first stage, so that the clothes can be fully leveled out on one hand (i.e. when the clothes reach the first target rotation speed, the smaller value accords with a preset condition), the clothes are uniformly distributed, and on the other hand, the clothes can be weighed under the condition that the clothes can not be fully leveled out. For example, when weighing a thicker infant clothing, although the weight of the infant clothing is relatively light, the weight of the infant clothing is relatively concentrated, and the weight of the infant clothing cannot be effectively dispersed, and therefore the eccentricity of the infant clothing is relatively heavy, at this time, the infant clothing is weighed in a first weighing mode { if the rotation speed of the washing machine is forcedly accelerated to the overshoot rotation speed n4 by a second acceleration strategy without effective dispersion of the laundry, the washing machine will generate problems such as displacement and vibration, etc. }, at this time, a first actual weighing coefficient is calculated according to the obtained average power and time t1, and the weight of the infant clothing is determined based on the first actual weighing coefficient.
More specifically, as described above, if the eccentricity value meets the preset adjustment { i.e., indicates that the laundry is sufficiently distributed and the eccentricity is not large }, when the washing machine reaches the first target rotation speed n2, the washing machine is controlled to increase the rotation speed of the washing machine to the overshoot rotation speed n4 according to the second target rotation speed n3 preset in the washing machine program and the second acceleration strategy greater than the acceleration speed a3 in the first acceleration strategy. For example, when the load of the laundry is more than half load of the washing machine { i.e., when the load is heavy, the laundry is more easily distributed }, at this time, the rotational speed of the washing machine reaches the overshoot rotational speed n4 through the second acceleration strategy, and the washing machine is decelerated from the overshoot rotational speed n4 to the second preset rotational speed in the deceleration strategy. And calculates a second actual weighing factor according to the obtained torque change rate T during acceleration and the duration of the deceleration stage, and determines the laundry weight based on the second actual weighing factor.
It should be noted that, in the weighing factor calculation method provided in the embodiment of the present invention, the time t of free deceleration is calculated { the first calculation method is the time t1 when free deceleration from the first target rotational speed to the first preset rotational speed is calculated, the second calculation method is the time duration of the deceleration stage in the process of deceleration from the overshoot rotational speed to the second preset rotational speed }, because the time required for free deceleration to the preset rotational speed is different when the load weight in the washing machine is different, so that the load weight in the washing machine can be determined according to the collected free deceleration time.
Preferably, the first preset rotational speed and the second preset rotational speed mentioned above are rotational speeds 0. That is, the first calculation mode is to calculate the time t1 required for free deceleration from the first target rotational speed to the rotational speed 0, and the second calculation mode is to calculate the duration of the deceleration phase in the course of free deceleration from the overshoot rotational speed to the rotational speed 0. Since the washing machine is decelerated to the rotation speed 0 at the time of free deceleration, the calculated free deceleration time is longest, so that the load weight accuracy is higher when the load weight is calculated. Meanwhile, the weighing method is to weigh dry clothes before washing, so that the washing machine can be directly controlled to perform corresponding operation according to the weight of the load when the weight of the load is calculated. For example, the amount of water intake is controlled according to the load weight, and for example, the amount of detergent addition is controlled according to the load weight, so that the time taken for treating laundry can be shortened.
For convenience of explanation, the following will describe further when the first preset rotational speed and the second preset rotational speed are both set to 0.
It should be noted that, when the second weighing mode is adopted, the weighing accuracy of the load is higher.
Specifically, because the acceleration adopted in the second weighing mode is larger than the acceleration in the first weighing mode { that is, the acceleration in the second acceleration strategy is larger than the acceleration in the first acceleration strategy }, the calculated actual weighing coefficient in the second weighing mode is compared with the { second preset weighing coefficient-weight } relation correspondence table { because the larger acceleration is adopted in the second weighing mode, and the torque change rate T } in the second acceleration strategy is calculated, the obtained weight is closer to the actual weight of the clothes, and the obtained clothes weight value is more accurate.
The reason why the acceleration in the second acceleration strategy is set to be large in the embodiment of the invention is that: in order to pull the calculated weighing factors farther apart when weighing different weights of laundry. For example, taking one kilogram of clothes and two kilograms of clothes as an example, in the first weighing mode, the weighing coefficient obtained by { namely the eccentric amount of the clothes and the time t1} when the first weighing mode is adopted by one kilogram of clothes is 1, the weighing coefficient obtained by { namely the eccentric amount of the clothes and the time t1} when the first weighing mode is adopted by two kilograms of clothes is 2, the weighing coefficient difference between one kilogram and two kilograms is 1, and the difference is small. If the second weighing mode { namely, by further acquiring the torque change rate T under the second acceleration strategy }, the weighing coefficients corresponding to one kilogram of clothes and two kilograms of clothes can be multiplied, so that the weighing coefficient between one kilogram and two kilograms of clothes is increased. In short, if the first phase is capable of dividing one kilogram of laundry and two kilograms of laundry into 1 and 2, the second phase is a process for dividing them into 2 and 4 { the first phase is referred to herein as a phase included in the first weighing mode, and the second phase is referred to as a phase included in the second weighing mode }. The larger acceleration is to multiply the values of 1 and 2 based on the original values. Thus, when the gear is divided, in the first stage, for example, a kilogram of corresponding value is 1, and two kilograms of corresponding value is 2, then in the second stage, the kilogram of corresponding value is 2, and the two kilograms of corresponding value is 4, so that a difference between the weighing coefficients 1 and 2 is an order of magnitude smaller than that between 2 and 4, and therefore, when the second weighing mode is adopted, the measured clothing weight is more accurate.
In the second phase, the weighing factor of the laundry can be multiplied because of the participation of the torque T { i.e., in the second weighing mode, the torque change rate is calculated }.
Specifically, when the washing machine is used for weighing loads with different weights, if a large acceleration is adopted, the rotation speed of the washing machine for accelerating to the center is different when the weights of the loads in the washing machine are different. If the rotation speeds of the tips are different, the values of the torque change rate in the acceleration process are also different, and the weight of clothes can lead the torque change rate T to have a linear increasing trend { the greater the weight of clothes is, the greater T is }, so that when clothes with different weights are weighed, the calculated weighing coefficients are multiplied relative to the first stage, the difference of the weighing coefficients between the clothes with different weights is increased, and the degree of distinction between the two weighing coefficients is larger. In the second stage of the embodiment of the invention, a larger acceleration is adopted, and the torque change rate T under the acceleration is obtained in the second weighing mode, which is based on the principle.
Therefore, in the embodiment of the invention, by arranging two weighing stages and providing one weighing mode under each weighing stage, on one hand, when clothes are unevenly distributed, the clothes can be weighed by the arranged first weighing mode, and on the other hand, when the clothes are evenly distributed, the clothes can be weighed by the arranged second weighing mode, and the accuracy of weighing the clothes is improved, namely, the weighing method provided by the embodiment of the invention can adopt different weighing modes for different clothes and simultaneously can also improve the weighing accuracy of the clothes.
Specifically, the method for determining the actual load weight based on the first actual weighing coefficient comprises the following steps:
and comparing the first actual weighing coefficient with a preset { first initial weighing coefficient-weight } relation corresponding table.
Wherein { first initial weighing factor-weight } relationship correspondence table is as follows:
load amount load (first initial weighing factor of clothing)
1kg A1
2kg A2
…… ……
nkg An
Further, as described above, the { first initial weighing coefficient-weight } relation table includes a plurality of sets of first initial weighing coefficients { i.e., A1, A2 … An } on the right side of the graph, each set of first initial weighing coefficients corresponds to a laundry weight value { i.e., a laundry weight on the left side of the graph }, where the method for comparing the first actual weighing coefficient with the preset { first initial weighing coefficient-weight } relation table and determining the laundry weight based on the comparison result includes:
if the first actual weighing coefficient is smaller than a preset minimum first initial weighing coefficient, determining that the current clothes weight is smaller than a clothes weight value corresponding to the preset minimum first initial weighing coefficient;
if the first actual weighing coefficient is between two adjacent preset first initial weighing coefficients, determining that the current clothes weight is between the clothes weight values corresponding to the two adjacent preset first initial weighing coefficients respectively;
If the first actual weighing coefficient is larger than the preset maximum first initial weighing coefficient, determining that the current clothes weight is larger than a clothes weight value corresponding to the preset maximum first initial weighing coefficient.
As described above, the first acceleration strategy is adopted in the first stage of the embodiment of the present invention to effectively distribute the laundry, so as to avoid serious laundry eccentricity. Based on this, in order to further improve the distribution effect on the clothes, the first acceleration strategy in the embodiment of the present invention includes n acceleration stages, where n is an integer greater than or equal to 1, and the staged target rotation speed is a target rotation speed corresponding to each acceleration stage after acceleration, and the target rotation speed corresponding to the last acceleration stage is the first target rotation speed mentioned above.
On the basis, the weighing method further comprises the following steps:
n average powers of the washing machine at n target rotational speeds are collected, and a first actual weighing factor is calculated based on the n average powers and a time t1 required for the first target rotational speed to be reduced to a rotational speed 0.
According to the embodiment of the invention, the first acceleration strategy is divided into a plurality of acceleration stages which are sequentially executed, so that the distribution effect on clothes can be further improved, and meanwhile, when the first actual weighing coefficient of the clothes is calculated in the first stage, the parameters used are the average power { namely the acquired sample data amount } of the target rotating speed corresponding to each acceleration stage, so that the stability of the result of the calculated weighing coefficient of the clothes is higher, namely the weighing result error is smaller and the weighing precision is higher when the clothes with the same weight are weighed for a plurality of times.
Specifically, when the first acceleration strategy is divided into a plurality of acceleration stages that are sequentially executed, the method for controlling the washing machine to accelerate to the first target rotation speed and run for a preset time period according to the first acceleration strategy further includes:
the n acceleration phases are controlled to run at different accelerations, and when n > 1, it is preferable to run the acceleration a1 of the first acceleration phase at a greater acceleration than the rest of the acceleration phases.
According to the embodiment of the invention, the plurality of acceleration stages are controlled to run at different accelerations in the first acceleration strategy, so that the washing machine has different torque output in each acceleration stage, and the problem of unstable washing machine power caused by uncontrollable factors such as installation difference and friction force of the washing machine shaft can be solved.
In the embodiment of the invention, the acceleration a1 of the first acceleration stage is set to be larger than the acceleration of the rest acceleration stages, so that the normal starting of the washing machine can be ensured { if the acceleration a1 of the first acceleration stage is set to be smaller, the starting of the washing machine is difficult }.
Therefore, on one hand, the distribution effect on clothes is improved, and on the other hand, the problem of unstable power caused by uncontrollable factors such as installation difference of the washing machine, friction force of the shaft of the washing machine and the like is solved.
Further, the method for controlling the washing machine to accelerate to the first target rotating speed and run for a preset time period according to the first acceleration strategy further comprises the following steps:
each of the n acceleration phases is controlled to run for the same duration. It should be noted that, in the embodiment of the present invention, the duration of the acceleration phase is the sum of the duration of the acceleration phase and the duration of the steady-speed phase.
According to the embodiment of the invention, the operation time lengths of the n acceleration stages are set to be the same, so that more accurate data obtained when the weighing coefficient is calculated can be ensured.
Preferably, in the embodiment of the present invention, the first acceleration policy is set to a first acceleration stage and a second acceleration stage that are sequentially executed;
the first acceleration stage comprises the steps of controlling the washing machine to run from the rotating speed 0 to the rotating speed n1 at the acceleration a1, and collecting the average power w1 of the washing machine at the rotating speed n 1;
the second acceleration stage comprises controlling the washing machine to run from the rotating speed n1 to the rotating speed n2 at the acceleration a2, and collecting the average power w2 of the washing machine at the rotating speed n 2;
wherein a1 < 20m/s, 3m/s, a2 < 20 m/s.
In any of the above embodiments, the second actual weighing factor mentioned above is compared with a { second initial weighing factor-weight } relationship correspondence table preset in the washing machine program. Wherein { second initial weighing factor-weight } relationship correspondence table is as follows:
load amount load (clothing)
1kg B1
2kg B2
…… ……
nkg Bn
As can be seen from the above { second preset weighing factor-weight } relationship correspondence table.
The preset { second initial weighing coefficient-weight } relation corresponding table comprises a plurality of groups of second initial weighing coefficients, each group of second initial weighing coefficients corresponds to a load value, and the method for comparing the second actual weighing coefficient with the preset { second initial weighing coefficient-weight } relation corresponding table and determining the load weight based on the comparison result comprises the following steps:
if the second actual weighing coefficient is smaller than the preset minimum second initial weighing coefficient, determining that the current load weight is smaller than a load weight value corresponding to the preset minimum second initial weighing coefficient;
if the second actual weighing coefficient is between two adjacent preset second initial weighing coefficients, determining that the current load weight is between load weight values corresponding to the two adjacent preset second initial weighing coefficients respectively;
If the second actual weighing coefficient is larger than the preset maximum second initial weighing coefficient, determining that the current load weight is larger than a load weight value corresponding to the preset maximum second initial weighing coefficient.
It should be noted that, in the embodiment of the present invention, the values of A1 and B1 in the { first preset weighing coefficient-weight } relationship corresponding table and the { second preset weighing coefficient-weight } relationship corresponding table are not equal, but are respectively represented by 1kg of load, and the representation modes of other load are the same as those of the corresponding table.
In the application process of the weighing value { taking the numerical value in the table as an example }, if the load (clothes) calculated value is smaller than A1 or B1, the load is judged to be smaller than 1kg, and if the load is larger than A1 or B1 and smaller than A2 or B2, the load is judged to be between 1kg and 2kg, and the corresponding relation between the values of other loads (clothes) and the actual load is the same as the rule.
Further, the deceleration strategy in the embodiment of the present invention includes a first deceleration stage for freely decelerating from the overshoot speed n4 to a second target speed n3, and a second deceleration stage for freely decelerating from the second target speed n3 to a speed 0, where a set value of the second target speed n3 is greater than a set value of the first target speed n 2;
The weighing method further comprises the following steps: calculating time t3 required by the washing machine when the washing machine freely decelerates from the second target rotating speed n3 to the rotating speed 0, calculating a second actual weighing coefficient according to the torque change rate in the second acceleration strategy and time t2, and determining the actual load weight based on the second actual weighing coefficient; or alternatively
The weighing method further comprises the following steps: calculating time T2 required by the washing machine to freely slow down from the overshoot rotation speed n4 to the second target rotation speed n3 and time T3 required by the washing machine to freely slow down from the second target rotation speed n3 to the rotation speed 0, calculating a second actual weighing coefficient according to the torque change rate T in the second acceleration strategy and the time T3 and T2, and determining the actual load weight based on the second actual weighing coefficient.
It should be noted that, in the embodiment of the present invention, the "free deceleration" of the washing machine is controlled by: the washing drum is no longer controlled by the washing machine, i.e. the washing drum is only slowed down under the action of its own weight and the weight of the internal load, and different free deceleration times are obtained by the different weights of the loads in the washing drum.
Namely, the weighing calculation method in the embodiment of the invention comprises a first calculation method for calculating t3 independently and a second calculation method for calculating t2 and t3 together in the calculation of the time parameter.
It should be noted that, in the embodiment of the present invention, the reason why the time t2 when the washing machine freely decreases from the overshoot speed to the second target speed is calculated by the second calculation method is that: when the time for the washing machine to rise from the first target rotation speed n2 to the overshoot rotation speed at the acceleration a3 is indefinite { the time for the free deceleration from the overshoot rotation speed n4 to the second target rotation speed n3 is indefinite because the acceleration employed in the second acceleration strategy is large }, the uncertainty of the time factor for the free deceleration from the overshoot rotation speed n4 to the second target rotation speed n3 needs to be eliminated in the embodiment of the present invention. Wherein a3 is more than a1, and a3 is more than or equal to 20 m/s.
Specifically, since the load weighing in the embodiment of the invention mainly weighs the dry load { i.e. dry clothes }, when the washing machine is lowered from the overshoot rotation speed n4 to the second target rotation speed n3, the dry load in the washing machine easily touches the door glass of the washing machine, thereby generating friction force, and being influenced by friction force factors, so that the weight value obtained when the load with the same weight is weighed at the previous time is inconsistent with the weight value obtained when the load with the same weight is weighed at the latter side. Therefore, the collecting time t2 in the embodiment of the invention is to remove the friction factor, so that the accuracy of the washing machine is more accurate when the load is weighed.
For example, when the load in the washing machine is in a half-load condition, if the washing machine is free to slow down to the second target rotational speed n3 after being raised to the overshoot rotational speed n4 by a higher acceleration a3, if the load in the washing machine hits the door glass of the washing machine, the time from n4 to n3 is short { due to friction }, the decrease speed change thereof is relatively obvious, and the load at this time is in a state of being fitted to the door glass of the washing machine. When the washing machine is free to slow down to 0 after running at n3 rotation speed for a while, the load state in the washing machine is not changed any more because the washing machine has been stably running at n3 rotation speed for a while. Namely, the washing machine is free to reduce from the overshoot speed to the speed 0, wherein one stage is from n4 to n3, and the other stage is from n3 to 0, wherein the one stage of reducing from the speed n4 to the speed n3 has a certain probability of generating friction force { the same weight load with door glass of the washing machine is in a larger acceleration rising speed, when the washing machine reaches the overshoot speed, the state of the same weight load in the washing machine is changed, so that during free speed reduction, friction force generated between the load and the door glass of the washing machine is sometimes generated, and friction force generated between the load and the door glass of the washing machine is not generated, so that the time of reducing from the overshoot speed n4 to the second target speed n3 is uncertain }, therefore, the uncertain friction force factor in the speed reduction stage of n4-n3 is removed, and the measurement accuracy is improved. If only the time t3 of the deceleration phase of n3-0 is calculated, the weight of the load obtained at the previous measurement and the weight of the load obtained at the next measurement are inconsistent for the load of the same weight.
Specifically, under the first calculation method, when the eccentric value at the first target rotating speed does not meet the preset condition, calculating a first actual weighing coefficient according to a first calculation formula;
a first calculation formula: first actual weighing factor= (w1+w2+ … +wn)/n/t 1;
under the condition that the eccentric value at the first target rotating speed meets the preset condition, calculating a second actual weighing coefficient according to a second calculation formula;
the second calculation formula: second actual weighing factor = T/T3;
wherein w 1-wn are average powers of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to reduce from the first target rotating speed to the rotating speed 0, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T3 is time required for the washing machine to freely reduce from the second target rotating speed to the rotating speed 0, and n is an integer greater than or equal to 1.
It should be noted that the second calculation formula is selected when there is no influence of friction force, that is, in the second calculation formula, only the time from the rotation speed n3 to the rotation speed 0 is calculated, and the time from the rotation speed n4 to the rotation speed n3 is not calculated.
When the influence of friction force factors needs to be considered, the second calculation method is adopted, and when the eccentric value at the first target rotating speed meets the preset condition, the calculation is performed according to the following second calculation formula:
The second calculation formula: second actual weighing factor = T/(T3-T2);
wherein w 1-wn are average powers of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to reduce from the first target rotating speed to the rotating speed 0, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T3 is time required for the washing machine to freely reduce from the second target rotating speed to the rotating speed 0, and n is an integer greater than or equal to 1.
In this way, the measured load weight will be more accurate.
It should be noted that, the calculated load (actual weighing coefficient value) value is a relative value of the laundry, and is not a direct laundry weight, so when the formula is used, respective parameter acquisitions are required for different load states, and parameters of the laundry states of different weight levels are set to acquire oob, oob, w1, w2, T.
Namely, the washing machine needs to set the { first preset weighing coefficient-weight } relation corresponding table and the { second preset weighing coefficient-weight } relation corresponding table through the first calculation formula and the second calculation formula before leaving the factory.
On the other hand, the embodiment of the invention also provides a washing machine, which comprises a washing program, and when the washing machine responds to the control instruction of the washing program, the washing machine adopts the load weighing method to weigh the dry load.
Preferably, the above-mentioned washing machine is a drum type washing machine.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (15)

1. A method of weighing a load of a washing machine, the method comprising:
responding to a load weighing instruction of the washing machine, controlling the washing machine to accelerate to a first target rotating speed according to a first acceleration strategy and operating for a corresponding time period at the first target rotating speed;
acquiring an eccentric value at a first target rotating speed;
If the eccentric value at the first target rotating speed does not meet the preset condition, controlling the washing machine to freely reduce the speed from the first target rotating speed to a first preset rotating speed, calculating the time t1 required for reducing the speed from the first target rotating speed to the first preset rotating speed, calculating a first actual weighing coefficient according to the average power and the time t1 at the staged target rotating speed in the first acceleration strategy, and determining the actual load weight based on the first actual weighing coefficient;
and if the eccentric value at the first target rotating speed meets the preset condition, controlling the washing machine to accelerate to the overshoot rotating speed from the first target rotating speed according to a second preset target rotating speed by a second acceleration strategy, controlling the washing machine to decelerate to the second preset rotating speed from the overshoot rotating speed by a deceleration strategy, calculating a second actual weighing coefficient according to the torque change rate in the process of accelerating to the overshoot rotating speed and the duration of the deceleration stage in the process of decelerating from the overshoot rotating speed to the second preset rotating speed, and determining the actual load weight based on the second actual weighing coefficient.
2. The load weighing method according to claim 1, wherein the acceleration in the second acceleration strategy is greater than the acceleration in the first acceleration strategy.
3. The load weighing method according to claim 2, wherein said method of determining an actual load weight based on said first actual weighing factor comprises:
comparing the first actual weighing coefficient with a preset first initial weighing coefficient-weight relation corresponding table, wherein the preset first initial weighing coefficient-weight relation corresponding table comprises a plurality of groups of first initial weighing coefficients, and each group of first initial weighing coefficients corresponds to a load weight value:
if the first actual weighing coefficient is smaller than a preset minimum first initial weighing coefficient, determining that the current load weight is smaller than a load weight value corresponding to the preset minimum first initial weighing coefficient;
if the first actual weighing coefficient is between two adjacent preset first initial weighing coefficients, determining that the current load weight is between load weight values corresponding to the two adjacent preset first initial weighing coefficients respectively;
and if the first actual weighing coefficient is larger than a preset maximum first initial weighing coefficient, determining that the current load weight is larger than a load weight value corresponding to the preset maximum first initial weighing coefficient.
4. The load weighing method according to claim 1, wherein the first acceleration strategy includes n acceleration stages, n is an integer greater than or equal to 1, the stepwise target rotation speed is a target rotation speed corresponding to each acceleration stage after acceleration, and the target rotation speed corresponding to the last acceleration stage is the first target rotation speed;
The load weighing method further comprises the following steps:
and acquiring n average powers of the washing machine at n target rotating speeds, and calculating the first actual weighing coefficient based on the n average powers and time t 1.
5. The weighing method according to claim 4, wherein said method for controlling the washing machine to accelerate to a first target rotation speed with a first acceleration strategy and to run for a corresponding period of time at the first target rotation speed comprises:
the n acceleration phases are controlled to run at different accelerations.
6. The weighing method according to claim 4, characterized in that said acceleration phases comprise an acceleration operation phase and a steady-speed operation phase of acceleration to a first target rotation speed; the method for controlling the washing machine to accelerate to a first target rotating speed according to a first acceleration strategy and to run for a corresponding period of time at the first target rotating speed further comprises the following steps:
each of the n acceleration phases is controlled to run for the same duration.
7. The weighing method according to claim 5 or 6, characterized in that said first acceleration strategy comprises a first acceleration phase and a second acceleration phase performed in sequence;
the first acceleration stage comprises controlling the washing machine to run from the rotating speed 0 to the rotating speed n1 at the acceleration a1, and collecting the average power w1 of the washing machine running at the rotating speed n 1;
The second acceleration stage includes controlling the washing machine to run from a rotational speed n1 to a rotational speed n2 at an acceleration a2, and collecting an average power w2 of the washing machine running at the rotational speed n 2.
8. The weighing method according to any one of claims 1-6, characterized in that said method of determining the actual load weight based on said second actual weighing factor comprises:
comparing the second actual weighing coefficient with a preset second initial weighing coefficient-weight relation corresponding table, wherein the preset second initial weighing coefficient-weight relation corresponding table comprises a plurality of groups of second initial weighing coefficients, and each group of second initial weighing coefficients corresponds to a load value;
if the second actual weighing coefficient is smaller than a preset minimum second initial weighing coefficient, determining that the current load weight is smaller than a load weight value corresponding to the preset minimum second initial weighing coefficient;
if the second actual weighing coefficient is between two adjacent preset second initial weighing coefficients, determining that the current load weight is between load weight values corresponding to the two adjacent preset second initial weighing coefficients respectively;
and if the second actual weighing coefficient is larger than the preset maximum second initial weighing coefficient, determining that the current load weight is larger than a load weight value corresponding to the preset maximum second initial weighing coefficient.
9. The weighing method according to claim 1, characterized in that said deceleration strategy comprises a first deceleration phase of free deceleration from said overshoot speed to a second target speed and a second deceleration phase of free deceleration from the second target speed to a second preset speed, wherein said second target speed is greater than said first target speed;
the weighing method further comprises the following steps: calculating time t3 required by the washing machine when the washing machine freely decelerates from a second target rotating speed to a second preset rotating speed, calculating a second actual weighing coefficient according to the torque change rate in the second acceleration strategy and the time t3, and determining the actual load weight based on the second actual weighing coefficient; or alternatively
The weighing method further comprises the following steps: calculating time t2 required by the washing machine to freely slow down from the overshoot rotation speed to the second target rotation speed and time t3 required by the washing machine to freely slow down from the second target rotation speed to the second preset rotation speed, calculating a second actual weighing coefficient according to the torque change rate in the second acceleration strategy and time t3 and t2, and determining the actual load weight based on the second actual weighing coefficient.
10. The weighing method according to claim 9, characterized in that, in case the eccentricity value at the first target rotation speed does not meet a preset condition, a first actual weighing factor is calculated according to a first calculation formula;
A first calculation formula: first actual weighing factor= (w1+w2+ … +wn)/n/t 1;
under the condition that the eccentric value at the first target rotating speed meets the preset condition, calculating a second actual weighing coefficient according to a second calculation formula;
the second calculation formula: second actual weighing factor = T/T3;
wherein w 1-wn are average power of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to drop from the first target rotating speed to the first preset rotating speed, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T3 is time required for the washing machine to freely drop from the second target rotating speed to the second preset rotating speed, and n is an integer greater than or equal to 1.
11. The weighing method according to claim 9, characterized in that, in case the eccentricity value at the first target rotation speed does not meet a preset condition, a first actual weighing factor is calculated according to a first calculation formula;
a first calculation formula: first actual weighing factor= (w1+w2+ … +wn)/n/t 1;
under the condition that the eccentric value at the first target rotating speed meets the preset condition, calculating a second actual weighing coefficient according to a second calculation formula;
The second calculation formula: second actual weighing factor = T/(T3-T2);
wherein w 1-wn are average powers of the washing machine in different acceleration stages when the first acceleration strategy is executed, T1 is time required for the washing machine to drop from the first target rotating speed to the first preset rotating speed, T is torque change rate of the washing machine in the acceleration stage when the second acceleration strategy is executed, T2 is time required for the washing machine to freely drop from the overshoot rotating speed to the second target rotating speed, T3 is time required for the washing machine to freely drop from the second target rotating speed to the second preset rotating speed, and n is an integer greater than or equal to 1.
12. A weighing method according to claim 10 or 11, characterized in that,
the first preset weighing coefficient-weight relation corresponding table is used for comparing the first actual weighing coefficient to determine the actual load weight, and the first calculation formula is adopted for setting;
and the second preset weighing coefficient-weight relation corresponding table is used for comparing the second actual weighing coefficient to determine the actual load weight, and the second calculation formula is adopted for setting.
13. A weighing method according to claim 1, characterized in that,
the first preset rotating speed and the second preset rotating speed are rotating speed 0.
14. A washing machine comprising a washing program, wherein the dry load is weighed using the load weighing method of any one of claims 1-13 when the washing machine is responsive to control instructions of the washing program.
15. The washing machine as claimed in claim 14, wherein the washing machine is a drum type washing machine.
CN202310859735.9A 2023-07-13 2023-07-13 Washing machine load weighing method and washing machine Active CN116575215B (en)

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CN115029892A (en) * 2022-06-30 2022-09-09 重庆海尔洗衣机有限公司 Clothes drying control method and device and drum washing machine

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CN106544814A (en) * 2016-09-30 2017-03-29 无锡小天鹅股份有限公司 Washing machine and its wet cloth Weighing method and device
CN111501288A (en) * 2019-01-15 2020-08-07 无锡飞翎电子有限公司 Washing machine and weighing method and weighing device thereof
CN111705471A (en) * 2020-06-17 2020-09-25 江苏新安电器股份有限公司 Software algorithm for realizing dry cloth weight sensing of BLDC drum washing machine
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