CN-121992616-A - Washing machine and control method thereof

CN121992616ACN 121992616 ACN121992616 ACN 121992616ACN-121992616-A

Abstract

The application provides a washing machine and a control method thereof, wherein the washing machine comprises an inner cylinder, a motor and a belt, the belt is sleeved on a rotating shaft of the inner cylinder and a rotating shaft of the motor, the belt is used for transmitting rotation of the motor to the inner cylinder, the control method of the washing machine comprises the steps of taking deformation of the belt and a power value of the motor as a group of detection parameters, obtaining at least two groups of detection parameters, and calculating an eccentric value of the washing machine according to the at least two groups of detection parameters. In the washing machine with the belt, the eccentricity value of the washing machine is calculated by adopting two parameters of the deformation of the belt and the power of the motor, and compared with the calculation of the eccentricity value by adopting a single parameter, the unbalance detection precision of the washing machine can be improved.

Inventors

FANG DONGSHENG
WANG ZHONGQING
GAO LIMIN
CAI SHASHA
ZHU YUANMU

Assignees

TCL家用电器（合肥）有限公司

Dates

Publication Date: 20260508
Application Date: 20260302

Claims (10)

1. The control method of the washing machine comprises an inner cylinder, a motor and a belt, wherein the belt is sleeved on a rotating shaft of the inner cylinder and a rotating shaft of the motor, and the belt is used for transmitting rotation of the motor to the inner cylinder, and the control method of the washing machine is characterized by comprising the following steps: Taking the deformation of the belt and the power value of the motor as a group of detection parameters to obtain at least two groups of detection parameters; and calculating the eccentricity value of the washing machine according to the at least two groups of detection parameters.
2. The control method according to claim 1, wherein the calculating the eccentricity value of the washing machine based on the at least two sets of detection parameters includes: acquiring a first deformation amount and a first power value of the motor at a first rotating speed, and a second deformation amount and a second power value of the motor at a second rotating speed; Calculating a first angular velocity at the first rotational speed and calculating a second angular velocity at the second rotational speed; And calculating an eccentricity value of the washing machine according to a deformation difference between the first deformation amount and the second deformation amount, an angular velocity square difference between the first angular velocity and the second angular velocity, and a torque difference between the first power value and the first torque of the first angular velocity and the second power value and the second torque of the second angular velocity.
3. The control method according to claim 2, wherein the calculating the eccentricity value of the washing machine based on the at least two sets of detection parameters further comprises: And adding the first ratio of the deformation difference to the square difference of the angular speed and the second ratio of the torque difference to the square difference of the angular speed to obtain the eccentricity value of the washing machine.
4. A control method according to claim 3, wherein said adding the first ratio of the deformation difference to the angular velocity squared difference and the second ratio of the torque difference to the angular velocity squared difference to obtain the eccentricity value of the washing machine comprises: Acquiring a first constant corresponding to the deformation difference caused by centrifugal force and a second constant corresponding to the power consumption difference caused by eccentricity; multiplying the first constant by the first ratio and multiplying the second constant by the second ratio, and then adding to obtain the eccentricity value of the washing machine.
5. The control method according to claim 1, wherein the obtaining at least two sets of detection parameters using the deformation amount of the belt and the power value of the motor as a set of detection parameters includes: acquiring a plurality of deformation amounts of the belt detected by a deformation sensor; converting the analog quantities of the plurality of deformation quantities into physical quantities, and performing data cleaning; acquiring a plurality of target deformation values after data cleaning and a plurality of power values of the motor; At least two sets of detection parameters are obtained based on the plurality of target deformation amounts and the plurality of power values, each set of detection parameters including one target deformation amount and one power value.
6. The control method according to claim 5, wherein the acquiring the plurality of deformation amounts of the belt detected by the deformation sensor includes: Detecting a plurality of deformation amounts of the belt in at least two ways; the obtaining the plurality of target deformation values after data cleaning and the plurality of power values of the motor comprises the following steps: Averaging the multiple deformation variables detected in different modes to obtain multiple target deformation variables; a plurality of power values of the motor are acquired.
7. The control method of claim 6, wherein the detecting the plurality of deformation amounts of the belt in at least two ways comprises: emitting laser light to the belt surface; Calculating a plurality of distances between the belt and the deformation sensor according to the position change of the reflected light; And calculating a plurality of deformation amounts according to the distance differences of the plurality of distances.
8. The control method of claim 6, wherein the detecting the plurality of deformation amounts of the belt in at least two ways further comprises: The high-frequency magnetic field generated by the deformation sensor coil induces eddy currents on the belt; a plurality of deformation amounts are calculated based on the induced eddy current changing the impedance value of the sensor coil.
9. The control method of claim 6, wherein the detecting the plurality of deformation amounts of the belt in at least two ways further comprises: collecting a current signal of the motor, and performing spectrum analysis on the current signal; And extracting characteristic frequency components dynamically related to the belt according to the frequency spectrum analysis, and calculating a plurality of deformation quantities according to the characteristic frequency components.
10. A washing machine, comprising: An inner drum for carrying laundry; the motor is used for driving the inner cylinder to rotate; the belt is sleeved on the rotating shaft of the inner cylinder and the rotating shaft of the motor and is used for transmitting the rotation of the motor to the inner cylinder; The deformation sensor is arranged around the belt and is used for detecting deformation of the belt; a controller electrically connected to the deformation sensor and the motor, the controller for performing the control method of the washing machine as claimed in any one of claims 1 to 9.

Description

Washing machine and control method thereof Technical Field The application belongs to the technical field of washing machines, and particularly relates to a washing machine and a control method thereof. Background The unbalance detection technology of the washing machine is an important guarantee for ensuring the stable operation of the washing machine, and whether the washing machine can stably operate depends on the accuracy of unbalance detection. Conventional unbalance detection is mainly calculated by using the fluctuation degree of the motor rotation speed in a period of time, which is lower in detection accuracy for the washing machine with the belt. Disclosure of Invention The embodiment of the application provides a washing machine and a control method thereof, which can improve the unbalance detection precision of the washing machine with a belt. In a first aspect, an embodiment of the present application provides a control method of a washing machine, the washing machine including an inner tub, a motor, and a belt, the belt being sleeved on a rotation shaft of the inner tub and a rotation shaft of the motor, the belt being used to transmit rotation of the motor to the inner tub, the control method of the washing machine including: Taking the deformation of the belt and the power value of the motor as a group of detection parameters to obtain at least two groups of detection parameters; and calculating the eccentricity value of the washing machine according to the at least two groups of detection parameters. Optionally, the calculating the eccentricity value of the washing machine according to the at least two sets of detection parameters includes: acquiring a first deformation amount and a first power value of the motor at a first rotating speed, and a second deformation amount and a second power value of the motor at a second rotating speed; Calculating a first angular velocity at the first rotational speed and calculating a second angular velocity at the second rotational speed; And calculating an eccentricity value of the washing machine according to a deformation difference between the first deformation amount and the second deformation amount, an angular velocity square difference between the first angular velocity and the second angular velocity, and a torque difference between the first power value and the first torque of the first angular velocity and the second power value and the second torque of the second angular velocity. Optionally, the calculating the eccentricity value of the washing machine according to the at least two sets of detection parameters further includes: And adding the first ratio of the deformation difference to the square difference of the angular speed and the second ratio of the torque difference to the square difference of the angular speed to obtain the eccentricity value of the washing machine. Optionally, the adding the first ratio of the deformation difference to the square difference of the angular speed and the second ratio of the torque difference to the square difference of the angular speed to obtain the eccentricity value of the washing machine includes: Acquiring a first constant corresponding to the deformation difference caused by centrifugal force and a second constant corresponding to the power consumption difference caused by eccentricity; multiplying the first constant by the first ratio and multiplying the second constant by the second ratio, and then adding to obtain the eccentricity value of the washing machine. Optionally, the obtaining at least two sets of detection parameters by using the deformation of the belt and the power value of the motor as a set of detection parameters includes: acquiring a plurality of deformation amounts of the belt detected by a deformation sensor; converting the analog quantities of the plurality of deformation quantities into physical quantities, and performing data cleaning; acquiring a plurality of target deformation values after data cleaning and a plurality of power values of the motor; At least two sets of detection parameters are obtained based on the plurality of target deformation amounts and the plurality of power values, each set of detection parameters including one target deformation amount and one power value. Optionally, the acquiring the plurality of deformation amounts of the belt detected by the deformation sensor includes: Detecting a plurality of deformation amounts of the belt in at least two ways; the obtaining the plurality of target deformation values after data cleaning and the plurality of power values of the motor comprises the following steps: Averaging the multiple deformation variables detected in different modes to obtain multiple target deformation variables; a plurality of power values of the motor are acquired. Optionally, the detecting the plurality of deformation amounts of the belt in at least two ways includes: emitting laser light to the belt surface; Calculating a pluralit