# US 12,221,738 B2 · Operation control method and system for clothing treatment device, clothing treatment device, and storage medium

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- Number: US 12,221,738 B2
- Document ID: US12221738B2
- Status: Granted
- Kind: B2
- Application number: 17/088,022
- Filed: 2020-11-03
- Published: 2021-02-25
- Granted: 2025-02-11
- Earliest claimed: 2018-06-14
- Assignees: Guangdong Welling Motor Manufacturing Co., Ltd.; Midea Welling Motor Technology (Shanghai) Co., Ltd.
- Applicants: Guangdong Welling Motor Manufacturing Co., Ltd.; Midea Welling Motor Technology (Shanghai) Co., Ltd.
- Inventors: Lei Xu; Xiangnan Qin; Junyong Fu; Xiaoan Zhao
- Web page: https://patentgrep.com/patent/US12221738B2

## CPC

- D06F 33/48: Preventing or reducing imbalance or noise
- G05B 19/416: characterised by control of velocity, acceleration or deceleration (G05B19/19 takes precedence)
- D06F 2103/04: Quantity, e.g. weight or variation of weight
- D06F 2103/24: Spin speed; Drum movements
- D06F 2103/26: Imbalance; Noise level
- D06F 2103/38: Time, e.g. duration
- D06F 2103/46: of the motor driving the drum
- D06F 2105/02: Water supply
- D06F 2105/48: Drum speed
- D06F 2105/52: Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
- G05B 2219/43132: Rotation speed as function of minimum wave energy, toolwear, first learn for different speeds
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)

## Abstract

An operation control method and system for a clothing treatment device having a drum and a motor is provided. Load inertia of the drum and a fluctuation parameter of the motor are obtained. Load eccentric mass of the clothing treatment device is obtained based on the load inertia, the fluctuation parameter, and predetermined relationship data that is obtained based on pre-stored load inertia, torque fluctuation and load eccentric mass. The fluctuation parameter can be a torque fluctuation parameter or a rotation speed fluctuation parameter. The clothing treatment device can be controlled according to the load eccentric mass to optimize washing operations. For example, clothing and/or inlet water amount can be timely adjusted according to the calculated load eccentric mass. Thus, the clothing treatment device is prevented from producing significant noise during operations, and the service life of the clothing treatment device can be prolonged.

## Claims

### Claim 1

An operation control method for a clothing treatment device, wherein the clothing treatment device comprises a drum and a motor configured to drive the drum to spin, the operation control method comprising:
controlling the motor to perform a first operation process according to a first acceleration, and integrating electromagnetic torques of the motor during the first operation process to obtain a first integration result;
controlling the motor to perform a second operation process according to a second acceleration, and integrating electromagnetic torques of the motor during the second operation process to obtain a second integration result;
acquiring operation parameters of the clothing treatment device, wherein the operation parameters comprise a first operation period of the first operation process and rotation speed values of the motor at two end points of the first operation process, and a second operation period of the second operation process and rotation speed values of the motor at two end points of the second operation process;
calculating load inertia of the motor based on the first integration result, the second integration result and the operation parameters and setting the load inertia of the motor as the load inertia of the drum;
obtaining a fluctuation parameter of the motor;
obtaining load eccentric mass of the clothing treatment device based on the load inertia, the fluctuation parameter, and predetermined relationship data, wherein the predetermined relationship data is calculated based on pre-stored load inertia, pre-stored fluctuation parameters, and pre-stored load eccentric mass; and
controlling the clothing treatment device according to the load eccentric mass to redistribute a load,
wherein the fluctuation parameter comprises a torque fluctuation parameter.

### Claim 2 (depends on 1)

The operation control method for the clothing treatment device according to claim 1,
wherein the calculating the load inertia comprises calculating the load inertia according to the following formula:
J
=
t
B
-
t
A
t
D
-
t
C
⁢
∫
C
D
⁢
T
e
⁢
2
⁢
d
⁢
t
-
∫
A
B
⁢
T
e
⁢
1
⁢
d
⁢
t
t
B
-
t
A
t
D
-
t
C
⁢
(
ω
D
-
ω
C
)
-
(
ω
B
-
ω
A
)
wherein
J is the load inertia; and
tA, tB, tC, and tD are starting and ending times of the first operation period and the second operation period, respectively;
ωA, ωB, ωC, and ωD are the rotation speed values at two end points of the first operation process and the second operation process, respectively; and
∫
A
B
⁢
T
e
⁢
1
⁢
dt
⁢
⁢
and
⁢
⁢
∫
C
D
⁢
T
e
⁢
2
⁢
dt
are the first integration result and the second integration result, respectively.

### Claim 3 (depends on 1)

The operation control method for the clothing treatment device according to claim 1,
wherein the torque fluctuation parameter is obtained by:
detecting torque values of the motor in real time during the first operation process or the second operation process;
obtaining a maximum torque value and a minimum torque value; and
obtaining the torque fluctuation parameter based on the maximum torque value and the minimum torque value.

### Claim 4 (depends on 1)

The operation control method for the clothing treatment device according to claim 1, wherein:
the first operation period is of a first integral multiple of a spinning cycle of the drum of the clothing treatment device and the second operation period is of a second integral multiple of the spinning cycle; and
the first integral multiple is equal to the second integral multiple.

### Claim 5 (depends on 1)

The operation control method for the clothing treatment device according to claim 1,
wherein the obtaining the load eccentric mass of the clothing treatment device comprises:
determining a range of load inertia according to the load inertia and two fitted curves corresponding to two end points of the range of load inertia, based on the predetermined relationship data;
determining coordinate points of the two fitted curves based on the torque fluctuation parameter, such that the coordinate points correlate with the torque fluctuation parameter; and
determining the load eccentric mass of the clothing treatment device based on the coordinate points.

### Claim 6 (depends on 1)

The operation control method for the clothing treatment device according to claim 1, further comprises:
inletting water into the drum; and
controlling inlet water amount of the clothing treatment device according to the load eccentric mass to prevent noise generated by the clothing treatment device.

### Claim 7

An operation control system for a clothing treatment device, wherein the clothing treatment device comprises a drum and a motor configured to drive the drum to spin, the operation control system comprising:
a memory for storing a computer program; and
a processor being configured to execute the computer program to:
control the motor to perform a first operation process according to a first acceleration, and integrate electromagnetic torques of the motor during the first operation process to obtain a first integration result;
control the motor to perform a second operation process according to a second acceleration, and integrate electromagnetic torques of the motor during the second operation process to obtain a second integration result;
acquire operation parameters of the clothing treatment device, wherein the operation parameters comprise a first operation period of the first operation process and rotation speed values of the motor at two end points of the first operation process, and a second operation period of the second operation process and rotation speed values of the motor at two end points of the second operation process;
calculate load inertia of the motor based on the first integration result, the second integration result and the operation parameters and setting the load inertia of the motor as the load inertia of the drum;
obtain a fluctuation parameter of the motor;
obtain load eccentric mass of the clothing treatment device based on the load inertia, the fluctuation parameter, and predetermined relationship data, wherein the predetermined relationship data is calculated based on pre-stored load inertia, pre-stored fluctuation parameters, and pre-stored load eccentric mass; and
control the clothing treatment device according to the load eccentric mass to redistribute a load,
wherein the fluctuation parameter comprises a torque fluctuation parameter.

### Claim 8 (depends on 7)

The operation control system for the clothing treatment device according to claim 7,
wherein the processor is further configured to execute the computer program to obtain the torque fluctuation parameter by:
detecting torque values of the motor in real time during the first operation process or the second operation process;
obtaining a maximum torque value and a minimum torque value; and
obtaining the torque fluctuation parameter based on the maximum torque value and the minimum torque value.

### Claim 9 (depends on 7)

The operation control system for the clothing treatment device according to claim 7,
wherein the processor is further configured to execute the computer program to obtain the load eccentric mass of the clothing treatment device by:
determining a range of load inertia according to the load inertia and two fitted curves corresponding to two end points of the range of load inertia, based on the predetermined relationship data;
determining coordinate points of the two fitted curves based on the torque fluctuation parameter, such that the coordinate points correlate with the torque fluctuation parameter; and
determining the load eccentric mass of the clothing treatment device based on the coordinate points.

### Claim 10 (depends on 7)

The operation control system for the clothing treatment device according to claim 7,
wherein the processor is further configured to:
inlet water into the drum; and
execute the computer program to control inlet water amount of the clothing treatment device according to the load eccentric mass to prevent noise generated by the clothing treatment device.

### Claim 11 (depends on 7)

A clothing treatment device comprising the operation control system for the clothing treatment device according to claim 7.

### Claim 12

A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, causes the processor to implement an operation control method for a clothing treatment device, wherein the clothing treatment device comprises a drum and a motor configured to drive the drum to spin, the operation control method comprising:
controlling the motor to perform a first operation process according to a first acceleration, and integrating electromagnetic torques of the motor during the first operation process to obtain a first integration result;
controlling the motor to perform a second operation process according to a second acceleration, and integrating electromagnetic torques of the motor during the second operation process to obtain a second integration result;
acquiring operation parameters of the clothing treatment device, wherein the operation parameters comprise a first operation period of the first operation process and rotation speed values of the motor at two end points of the first operation process, and a second operation period of the second operation process and rotation speed values of the motor at two end points of the second operation process;
calculating load inertia of the motor based on the first integration result, the second integration result and the operation parameters and setting the load inertia of the motor as the load inertia of the drum;
obtaining a fluctuation parameter of the motor;
obtaining load eccentric mass of the clothing treatment device based on the load inertia, the fluctuation parameter, and predetermined relationship data, wherein the predetermined relationship data is calculated based on pre-stored load inertia, pre-stored fluctuation parameters, and pre-stored load eccentric mass; and
controlling the clothing treatment device according to the load eccentric mass to redistribute a load,
wherein the fluctuation parameter comprises a torque fluctuation parameter.