阅读说明：本技术 一种洗衣机及控制方法 (Washing machine and control method ) 是由 谢建军 覃宏波 林子豪 郑明星 于 2021-07-23 设计创作，主要内容包括：本发明属于洗衣机领域,尤其涉及一种洗衣机及控制方法,洗衣机包括壳体和位于壳体内的外桶,外桶的外壁与壳体的内壁其中一个设置磁性件,另一设置电磁传感器,电磁传感器与磁性件位置对应,磁性件在壳体与外桶之间产生磁场,当洗衣机出现偏心时磁场的强弱发生变化,电磁传感器根据磁场强弱变化输出电压型的常量信号值；洗衣机还包括控制器,控制器在洗衣机脱水过程中实时获取电磁传感器输出的常量信号值,并将其与洗衣机的偏心值进行耦合获得校正后的偏心值,并控制洗衣机按照校正后的偏心值进行脱水控制。本发明的洗衣机通过增加偏心计算辅助装置,以及合理的偏心校正方式减少偏心控制误差,降低撞筒移位概率,提升脱水性能,缩短衣物摆平时间。(The invention belongs to the field of washing machines, and particularly relates to a washing machine and a control method thereof, wherein the washing machine comprises a shell and an outer barrel positioned in the shell, one of the outer wall of the outer barrel and the inner wall of the shell is provided with a magnetic part, the other is provided with an electromagnetic sensor, the electromagnetic sensor corresponds to the magnetic part in position, the magnetic part generates a magnetic field between the shell and the outer barrel, when the washing machine is eccentric, the strength of the magnetic field changes, and the electromagnetic sensor outputs a constant signal value of a voltage type according to the strength change of the magnetic field; the washing machine also comprises a controller, wherein the controller acquires a constant signal value output by the electromagnetic sensor in real time in the dewatering process of the washing machine, couples the constant signal value with the eccentricity value of the washing machine to obtain a corrected eccentricity value, and controls the washing machine to carry out dewatering control according to the corrected eccentricity value. The washing machine provided by the invention has the advantages that the eccentric calculation auxiliary device is added, the eccentric control error is reduced in a reasonable eccentric correction mode, the barrel collision displacement probability is reduced, the dewatering performance is improved, and the clothes leveling time is shortened.)

1. A washing machine is characterized by comprising a shell and an outer barrel positioned in the shell, wherein one of the outer wall of the outer barrel and the inner wall of the shell is provided with a magnetic part, the other one of the outer wall of the outer barrel and the inner wall of the shell is provided with an electromagnetic sensor, the electromagnetic sensor corresponds to the magnetic part in position, the magnetic part generates a magnetic field between the shell and the outer barrel, when the washing machine is eccentric, the strength of the magnetic field changes, and the electromagnetic sensor outputs a constant signal value of a voltage type according to the strength change of the magnetic field;

the washing machine further comprises a controller, wherein the controller acquires a constant signal value output by the electromagnetic sensor in real time in the dewatering process of the washing machine, couples the constant signal value with the eccentricity value of the washing machine to acquire a corrected eccentricity value, and controls the washing machine to carry out dewatering control according to the corrected eccentricity value.

2. The washing machine as claimed in claim 1, wherein the magnetic member is disposed on an outer wall of the outer tub near a tub opening, and the electromagnetic sensor is disposed on an inner wall of the casing at a position corresponding to the magnetic member.

3. A washing machine as claimed in claim 1 wherein the electromagnetic sensor is a hall sensor.

4. A control method of a washing machine according to any one of claims 1 to 3, characterized in that the control method comprises: and in the dehydration process of the washing machine, acquiring a constant signal value output by the electromagnetic sensor in real time, coupling the constant signal value with the eccentricity value of the washing machine to obtain a corrected eccentricity value, and controlling the washing machine to perform dehydration control according to the corrected eccentricity value.

5. The control method of a washing machine as claimed in claim 4, wherein the obtaining of the value of the constant signal outputted from the electromagnetic sensor in real time and the coupling thereof with the eccentricity value of the washing machine to obtain the corrected eccentricity value comprises

Acquiring an initial eccentricity value A1 of the washing machine;

acquiring a constant signal value H output by the electromagnetic sensor under an initial eccentricity value A1;

calculating a corrected eccentricity value A, wherein the corrected eccentricity value A satisfies the following conditions: a ═ f (a1, H) + C, where C is a calibration constant.

6. The control method of a washing machine as claimed in claim 5, wherein the corrected eccentricity value a satisfies: a ═ A₁H + C, where a1 is the initial eccentricity value, H is the constant signal value output by the electromagnetic sensor at the initial eccentricity value a1, and C is the correction constant.

7. The control method of a washing machine as claimed in claim 5, wherein said obtaining a constant signal value H of an output of the electromagnetic sensor at an initial eccentricity value A1 comprises

Determining an eccentricity range in a preset corresponding relation in which the initial eccentricity value A1 is located according to the preset corresponding relation between the eccentricity value and a constant signal value output by the electromagnetic sensor;

and determining the constant signal value H of the electromagnetic sensor under the initial eccentricity value A1 according to the constant signal value corresponding to the eccentricity range.

8. The control method of a washing machine as claimed in any one of claims 4 to 7, wherein the controlling of the washing machine for dehydration control according to the corrected eccentricity value includes

When the corrected eccentricity value A is less than or equal to the eccentricity threshold value for allowing dehydration, controlling the washing machine to perform dehydration;

and when the corrected eccentricity value A is larger than the eccentricity threshold value allowing dehydration, controlling the washing machine to perform shaking-off treatment and then acquiring the eccentricity value of the washing machine again, and correcting the newly acquired eccentricity value until the corrected eccentricity value is smaller than or equal to the eccentricity threshold value allowing dehydration.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the control method according to any of claims 4 to 8 when executing the program.

10. A non-transitory computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing the control method according to any one of claims 4 to 8.

Technical Field

The invention belongs to the field of washing machines, and particularly relates to a washing machine and a control method.

Background

Most of the drum washing machines on the market currently adopt a PMSM (permanent magnet synchronous motor) motor for control, and in order to detect the eccentricity caused by the uneven distribution of clothes in the drum washing machine, each semaphore of the motor is detected for carrying out eccentricity mapping. Therefore, the mapping eccentricity is in direct proportion to the swinging of the roller, and the basic requirement for detecting the eccentricity is met.

However, in the practical application process, because the gaps between the box body or the peripheral devices, the electrical appliance box and the outer drum are different, and when the clothes are at different positions of the inner drum, different swing tracks can be generated. When the same eccentricity is adopted for control, excessive control or insufficient control can occur, so that the dehydration time is long or the phenomenon of cylinder collision and displacement is caused.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a washing machine capable of reducing eccentric detection errors and a control method.

In order to solve the above technical problems, a first object of the present invention is to provide a washing machine, which includes a casing and an outer tub located in the casing, wherein one of an outer wall of the outer tub and an inner wall of the casing is provided with a magnetic member, and the other is provided with an electromagnetic sensor, the electromagnetic sensor corresponds to the magnetic member in position, the magnetic member generates a magnetic field between the casing and the outer tub, when the washing machine is eccentric, the strength of the magnetic field changes, and the electromagnetic sensor outputs a constant signal value of a voltage type according to the strength change of the magnetic field;

the washing machine further comprises a controller, wherein the controller acquires a constant signal value output by the electromagnetic sensor in real time in the dewatering process of the washing machine, couples the constant signal value with the eccentricity value of the washing machine to acquire a corrected eccentricity value, and controls the washing machine to carry out dewatering control according to the corrected eccentricity value.

Further optionally, the magnetic member is disposed on an outer wall of the outer tub at a position close to the tub opening, and the electromagnetic sensor is disposed on an inner wall of the casing at a position corresponding to the magnetic member.

Further optionally, the electromagnetic sensor is a hall sensor.

A second object of the present invention is to provide a control method of a washing machine, the control method including: and in the dehydration process of the washing machine, acquiring a constant signal value output by the electromagnetic sensor in real time, coupling the constant signal value with the eccentricity value of the washing machine to obtain a corrected eccentricity value, and controlling the washing machine to perform dehydration control according to the corrected eccentricity value.

Further optionally, the obtaining a constant signal value output by the electromagnetic sensor in real time and coupling the constant signal value with an eccentricity value of the washing machine to obtain a corrected eccentricity value includes

Acquiring an initial eccentricity value A1 of the washing machine;

acquiring a constant signal value H output by the electromagnetic sensor under an initial eccentricity value A1;

calculating a corrected eccentricity value A, wherein the corrected eccentricity value A satisfies the following conditions: a ═ f (a1, H) + C, where C is a calibration constant.

Further optionally, the corrected eccentricity value a satisfies: a ═ A₁H + C, where a1 is the initial eccentricity value, H is the constant signal value output by the electromagnetic sensor at the initial eccentricity value a1, and C is the correction constant.

Further optionally, the obtaining of the constant signal value H of the output of the electromagnetic sensor at the initial eccentricity value a1 includes

Determining an eccentricity range in a preset corresponding relation in which the initial eccentricity value A1 is located according to the preset corresponding relation between the eccentricity value and a constant signal value output by the electromagnetic sensor;

and determining the constant signal value H of the electromagnetic sensor under the initial eccentricity value A1 according to the constant signal value corresponding to the eccentricity range.

Further optionally, the controlling the washing machine to perform the dehydration control according to the corrected eccentricity value includes

When the corrected eccentricity value A is less than or equal to the eccentricity threshold value for allowing dehydration, controlling the washing machine to perform dehydration;

and when the corrected eccentricity value A is larger than the eccentricity threshold value allowing dehydration, controlling the washing machine to perform shaking-off treatment and then acquiring the eccentricity value of the washing machine again, and correcting the newly acquired eccentricity value until the corrected eccentricity value is smaller than or equal to the eccentricity threshold value allowing dehydration.

A third object of the present invention is to provide an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the control methods when executing the computer program.

A fourth object of the invention proposes a non-transitory computer-readable storage medium on which a computer program is stored, which computer program, when executed by a processor, implements the control method of any one of the above.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the washing machine provided by the invention has the advantages that the eccentric calculation auxiliary device is added, the eccentric control error is reduced in a reasonable eccentric correction mode, the barrel collision displacement probability is reduced, the dewatering performance is improved, and the clothes leveling time is shortened.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1: a side view of a washing machine according to an embodiment of the present invention;

FIG. 2: is a control flow chart of an embodiment of the invention

Wherein: 1-a shell; 2-an outer barrel; 3-an electromagnetic sensor; 4-magnetic element.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Most of the drum washing machines on the market currently adopt PMSM motors for control, and in order to detect eccentricity caused by uneven distribution of clothes in the drum washing machine, each semaphore of the detection motor is adopted for carrying out eccentricity mapping. Therefore, the mapping eccentricity is in direct proportion to the swinging of the roller, and the basic requirement for detecting the eccentricity is met. In the practical application process, because the gaps between the box body or the peripheral electric devices, the electric appliance box and the outer barrel are different, and clothes can generate different swing tracks when the inner barrel is at different positions. When the same eccentricity is adopted for control, excessive control or insufficient control can occur, so that the dehydration time is long or the phenomenon of cylinder collision and displacement is caused. In order to solve the above problem, an auxiliary device is added to optimize the calculation scheme of the eccentricity value again.

The embodiment proposes a washing machine, and the washing machine of the embodiment is selected from a drum washing machine and a pulsator washing machine. The washing machine comprises a shell 1 and an outer barrel 2 positioned in the shell 1, wherein one of the outer wall of the outer barrel 2 and the inner wall of the shell 1 is provided with a magnetic part 4, the other one is provided with an electromagnetic sensor 3, the electromagnetic sensor 3 corresponds to the magnetic part 4 in position, the magnetic part 4 generates a magnetic field between the shell 1 and the outer barrel 2, when the washing machine is eccentric, the strength of the magnetic field changes, and the electromagnetic sensor 3 outputs a constant signal value of a voltage type according to the strength change of the magnetic field; in some embodiments, as shown in fig. 1, an electromagnetic sensor 3 is disposed on an inner wall of the casing 1, and a magnetic member 4 is disposed on an outer wall of the outer tub 2 opposite to the electromagnetic sensor 3. In other embodiments, the magnetic member 4 is disposed on the inner wall of the casing 1, and the electromagnetic sensor 3 is disposed on the outer wall of the outer tub 2 opposite to the magnetic member 4. In order to facilitate the routing of the electromagnetic sensor and prevent the electromagnetic sensor 3 from being out of service when encountering water, the electromagnetic sensor 3 is preferably arranged on the casing 1, and the magnetic member 4 is preferably arranged on the outer barrel 2. The electromagnetic sensor 3 can be a Hall sensor, and the magnetic attraction piece can be a magnet.

The washing machine of the embodiment further comprises a controller, wherein the controller acquires a constant signal value output by the electromagnetic sensor 3 in real time in the dewatering process of the washing machine, couples the constant signal value with the eccentricity value of the washing machine to acquire a corrected eccentricity value, and controls the washing machine to carry out dewatering control according to the corrected eccentricity value.

After the washing machine enters the dewatering process, firstly, eccentricity detection is performed, and the outer tub 2 starts to swing due to the unbalanced laundry during the eccentricity detection stage, and at this time, the magnetic member 4 on the outer tub 2 will also swing. The Hall sensor detects the change of the intensity of the magnetic field, and the change of the signal intensity of the electromagnetic sensor is caused, and the changed state is processed in the electromagnetic sensor, and then the constant of the voltage mode is output. In the embodiment, the constant signal value output by the electromagnetic sensor 3 according to the change condition of the magnetic field is coupled with the eccentric value obtained by the washing machine through eccentric detection to correct the detected eccentric value, so that the detection is more consistent with the maximum state detection during the operation of the actual inner cylinder, the defect of single eccentric control is overcome, the eccentric control error is reduced, the probability of cylinder collision displacement is reduced, the dehydration performance is improved, and the clothes leveling time is shortened.

Further alternatively, the positions of the electromagnetic sensor 3 and the magnetic element 4 need to be installed at positions with obvious eccentric changes according to different system platforms, and the installation positions of the electromagnetic sensor 3 and the magnetic element 4 in fig. 1 only show one of the situations. The magnetic part 4 is arranged on the outer wall of the outer barrel 2 close to the barrel opening, and the electromagnetic sensor 3 is arranged on the inner wall of the shell 1 corresponding to the magnetic part 4.

The embodiment also provides a control method of the washing machine, which comprises the following steps: and in the dehydration process of the washing machine, acquiring a constant signal value output by the electromagnetic sensor in real time, coupling the constant signal value with the eccentricity value of the washing machine to obtain a corrected eccentricity value, and controlling the washing machine to perform dehydration control according to the corrected eccentricity value.

The embodiment corrects the detected eccentric value by coupling the constant signal value output by the electromagnetic sensor according to the magnetic field change condition with the eccentric value acquired by the washing machine through eccentric detection, so that the method is more suitable for the maximum state detection during the operation of the actual inner cylinder, overcomes the defect of single eccentric control, reduces the eccentric control error, reduces the probability of cylinder collision displacement, improves the dehydration performance and shortens the clothes leveling time.

Further optionally, the acquiring, in real time, a constant signal value output by the electromagnetic sensor, and coupling the constant signal value with an eccentricity value of the washing machine to obtain a corrected eccentricity value includes:

p1, obtaining an initial eccentricity value A1 of the washing machine; the eccentricity detection is needed after the washing machine enters the dehydration stage, and the obtained eccentricity value is the initial eccentricity value.

P2, acquiring a constant signal value H output by the electromagnetic sensor under the initial eccentricity value A1;

p3, calculating a corrected eccentricity value A, wherein the corrected eccentricity value A satisfies the following conditions: a ═ f (a1, H) + C, where C is a calibration constant. Optionally, the corrected eccentricity value a satisfies: a ═ A₁*H+C。

Further optionally, the obtaining of the constant signal value H of the output of the electromagnetic sensor at the initial eccentricity value a1 includes

Determining an eccentricity range in a preset corresponding relation in which the initial eccentricity value A1 is located according to the preset corresponding relation between the eccentricity value and a constant signal value output by the electromagnetic sensor;

and determining the constant signal value H of the electromagnetic sensor under the initial eccentricity value A1 according to the constant signal value corresponding to the eccentricity range.

Specifically, the preset corresponding relationship between the eccentricity value and the constant signal value output by the electromagnetic sensor needs to be set in advance before the washing machine leaves the factory, and the setting method can be selected according to actual conditions. An optional mode is that a plurality of different standard eccentric blocks are placed in a washing machine in a laboratory, so that the washing machine has different degrees of eccentricity in the dehydration process, the strength of a magnetic field can be changed according to the difference of the degrees of eccentricity, the strength of the magnetic field can be changed to change the signal size of a sensor, the changed state is processed in an electromagnetic sensor, a constant of a voltage type is output, data is collected and then a formula is synthesized according to the collected data, and the formula to be synthesized has a correction constant C to participate in the formula.

Constant signals output by the electromagnetic sensors under different degrees of eccentricity are recorded, and the constant signal values output by the corresponding electromagnetic sensors under various eccentric states are obtained by testing and correcting the maximum swing amplitude point generated by the eccentricity when the constant signal values are at the fixed installation position, and are not in direct mapping relation, so that the output values of the electromagnetic sensors reflect the output constant signal values under a certain eccentricity range. The corresponding relationship is as follows:

eccentricity (g)	Electromagnetic sensor max output (V)
		0	1
200	2
		……	……
1500	15

When the eccentricity is 0, the constant signal value output by the electromagnetic sensor is 1; when the eccentricity is 0-200, the constant signal value output by the electromagnetic sensor is 2; .., when the eccentricity is 1400-. And the constant signal value corresponding to the eccentricity range in which the initial eccentricity value detected in the dewatering process is positioned is the constant signal value output by the electromagnetic sensor under the eccentricity value. The corrected eccentric parameters in the embodiment are more suitable for the maximum state detection during the actual operation of the inner barrel, and the defect of single eccentric control is overcome.

Further optionally, the controlling the washing machine to perform the dehydration control according to the corrected eccentricity value includes

When the corrected eccentricity value A is less than or equal to the eccentricity threshold value for allowing dehydration, controlling the washing machine to perform dehydration; and when the corrected eccentricity value A is larger than the eccentricity threshold value allowing dehydration, controlling the washing machine to perform shaking-off treatment and then acquiring the eccentricity value of the washing machine again, and correcting the newly acquired eccentricity value until the corrected eccentricity value is smaller than or equal to the eccentricity threshold value allowing dehydration.

The embodiment also provides a control method of the washing machine, which acquires the eccentricity value of the washing machine in the dehydration process of the washing machine, performs eccentricity correction on the acquired eccentricity value according to the control method, and controls the washing machine to perform dehydration control according to the corrected eccentricity value.

As shown in the control flow chart of fig. 2, the control method includes the following steps:

s1, acquiring an initial eccentricity value A1 of the washing machine;

s2, acquiring an output signal value H of the electromagnetic sensor under the initial eccentricity value A1;

s3, coupling the obtained initial eccentricity value with a signal value output by the electromagnetic sensor to obtain a corrected eccentricity value;

and S3, controlling the washing machine to perform dewatering control according to the corrected eccentricity value.

And acquiring an initial value of the eccentricity at an eccentricity detection stage when the dehydration is started, wherein the acquired eccentricity value does not participate in the dehydration control and only participates in the calculation in the subsequent eccentricity optimization process. The embodiment corrects the eccentricity detected when the dehydration is started, and performs dehydration control according to the corrected eccentricity value to make up the defect of single eccentricity control, thereby reducing the eccentricity control error, reducing the displacement probability of the collision barrel, improving the dehydration performance and shortening the clothes leveling time.

The present embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor can call logic instructions in the memory to execute the following method: and acquiring an eccentricity value of the washing machine in the dewatering process of the washing machine, carrying out eccentricity correction on the acquired eccentricity value according to the control method, and controlling the washing machine to carry out dewatering control according to the corrected eccentricity value.

Furthermore, the logic instructions in the memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and for example, the method includes: and acquiring an eccentricity value of the washing machine in the dewatering process of the washing machine, carrying out eccentricity correction on the acquired eccentricity value according to the control method, and controlling the washing machine to carry out dewatering control according to the corrected eccentricity value.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.