WO2016045380A1

WO2016045380A1 - Washing machine and method for determining load off-centering of washing machine

Info

Publication number: WO2016045380A1
Application number: PCT/CN2015/077585
Authority: WO
Inventors: 熊明; 王娜娜
Original assignee: 无锡小天鹅股份有限公司
Priority date: 2014-09-25
Filing date: 2015-04-27
Publication date: 2016-03-31
Also published as: CN105506916A; CN105506916B

Abstract

A washing machine comprises: an inner barrel (12), a motor (14), a memory (16), a speed sensor (18) and a controller (10a). The motor (14) drives the inner barrel (12) to rotate for dehydration according to a preset dehydrating tempo, the speed sensor (18) is used to detect the dehydrating rotation speed of the inner barrel (12), and the controller (10a) compares the dehydrating rotation speed with a target rotation speed stored in the memory (16) to determine the off-centering condition of the load. The washing machine can accurately determine the load off-centering and has high dehydrating performance. Also provided is a method for determining load off-centering of a washing machine.

Description

Washing machine and method for determining load eccentricity of washing machine

Technical field

The present invention relates to the technical field of washing machine manufacturing, and in particular to a washing machine and a method for determining load eccentricity of a washing machine.

Background technique

At present, it is judged that the washing machine clothes are eccentric, and the method is generally adopted: the door switch is installed at a certain position from the inner cylinder of the washing machine, and the door switch has a certain breaking stroke. When the eccentricity of the clothes in the washing machine is large, the inner cylinder will be greatly displaced. If the offset reaches the breaking stroke of the door switch, the door switch is broken, the clothes are shaken, and the water is dehydrated. However, in most cases, when the eccentricity of the clothes in the barrel is large, the inner cylinder cannot hit the door switch due to the uncertainty of the movement track of the inner cylinder, and the door switch fails, causing serious consequences such as movement of the washing machine.

Summary of the invention

The present invention aims to solve at least one of the above technical problems.

To this end, a first object of the present invention is to provide a washing machine which can accurately determine the load eccentricity.

A second object of the present invention is to provide a method of determining the eccentricity of a washing machine load.

In order to achieve the above object, a washing machine according to an embodiment of the first aspect of the present invention includes: an inner cylinder; a motor for driving the inner cylinder to rotate according to a preset dehydration cycle to complete a dehydration process, wherein the dehydration process includes a first stage And the second stage after the first stage, the first stage is different from the dehydration beat of the second stage; and the memory stores the first stage when the inner cylinder rotates with a limit eccentricity a target rotational speed and a second target rotational speed when the inner cylinder rotates in the second stage; the speed sensor is configured to detect the first spin speed of the inner cylinder rotating according to the preset dehydration beat and a second dehydration speed; a controller, configured to compare the first dehydration rotation speed with the first target rotation speed and compare the second dehydration rotation speed with the second target rotation speed to determine whether the inner cylinder rotation occurs The eccentricity is determined to be eccentric when the first dehydration rotation speed is less than the first target rotation speed or when the second dehydration rotation speed is less than the second target rotation speed.

According to the washing machine of the embodiment of the present invention, the motor-driven inner cylinder rotates and dehydrates according to a predetermined dehydration tempo, and after detecting the spin-drying speed of the inner cylinder rotation by the speed sensor, the controller compares the spin-drying speed with the target rotational speed stored in the memory, thereby judging the load. The eccentricity. The washing machine of the invention overcomes the uncertainty of the movement track of the inner cylinder and cannot collide The drawbacks of the door switch have high dewatering performance.

In some examples, the controller is further configured to control the inner cylinder to stop and add water shattering load to the inner cylinder when the first spin speed is less than the first target speed, and when the first Controlling the motor to drive the inner cylinder to continue rotating when a spin speed is greater than or equal to the first target speed until entering the second phase after completing the first phase.

In some examples, the controller is further configured to control the inner cylinder to stop and add water to the internal cylinder when the second spin speed is less than the second target speed.

In some examples, the washing machine further includes: an alarm device configured to perform an alarm when the controller determines that the number of occurrences of eccentricity is greater than a preset threshold.

In some examples, the preset threshold is three.

A method for determining the eccentricity of a washing machine load is provided in an embodiment of the second aspect of the present invention, comprising the steps of: placing a load in an inner cylinder of the washing machine and driving the inner cylinder to rotate according to a predetermined dehydration cycle Dehydrating, completing a dehydration process, the dehydration process comprising a first stage and a second stage after the first stage, the first stage being different from the dehydration beat of the second stage; detecting the inner cylinder in the a first dehydration rotation speed of the first stage and a second dehydration rotation speed of the second stage; comparing the magnitude of the first dehydration rotation speed with the first target rotation speed and comparing the second dehydration speed with the second target rotation speed a size, wherein the first target rotational speed is a spin-drying speed when the inner cylinder is in a limit eccentricity in the first stage, and the second target rotational speed is a limit eccentricity in the inner cylinder in the second phase Dehydration speed of the time; when the first dehydration rotation speed is less than the first target rotation speed or when the second dehydration rotation speed is less than the second target rotation speed, it is determined that there is eccentricity.

According to the method for determining the eccentricity of the washing machine according to the embodiment of the present invention, the inner cylinder is driven to rotate and dehydrate according to a predetermined dehydration tempo, and the dehydration rotation speed of the rotation of the inner cylinder is detected, and the dehydration rotation speed is compared with the target rotation speed to determine the eccentricity of the load. The method of the invention overcomes the disadvantages of being unable to hit the door switch due to the uncertainty of the movement track of the inner cylinder, and improves the dewatering performance of the washing machine.

In some examples, further comprising: controlling the inner cylinder to stop and adding water to the inner cylinder when the first spin speed is less than the first target speed, and when the first spin speed is Controlling the inner cylinder to continue to rotate when greater than or equal to the first target rotational speed until entering the second phase after completing the first phase.

In some examples, further comprising: controlling the inner cylinder to stop when the second spin speed is less than the second target speed and adding a water shivering load to the inner cylinder.

In some examples, further comprising: performing alarm processing if it is determined that the number of times of eccentricity is greater than a preset threshold.

In some examples, the preset threshold is three.

Additional aspects and advantages of the invention will be set forth in part in the description which follows. Obviously, or as understood by the practice of the present invention.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a block diagram showing the structure of a washing machine in accordance with one embodiment of the present invention;

2 is a schematic view showing a mounting position of a speed sensor according to an embodiment of the present invention;

Figure 3 is a graph showing the spin speed in different eccentric conditions of one embodiment of the present invention;

4 is a flow chart of a method of determining a load eccentricity of a washing machine in accordance with one embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting. Rather, the invention is to cover all modifications, modifications and equivalents within the spirit and scope of the appended claims.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise explicitly defined and defined. Ground connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art. Further, in the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specified.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in an opposite order depending on the functions involved, in the order shown or discussed. It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

In the description of the present invention, the identification preceding the steps or actions, such as "Step S1" - "Step S4" or (1) - (4), is only used to describe the method of determining the eccentricity of the washing machine in the embodiment of the present invention. And cannot be understood as an indication or suggestion The relative order relationship is therefore not to be construed as limiting the invention.

A washing machine and a method of determining load eccentricity of a washing machine according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

Referring to Fig. 1, a washing machine 10 according to an embodiment of the present invention includes an inner cylinder 12, a motor 14, a memory 16, a speed sensor 18, and a controller 10a.

The motor 14 is used to drive the inner cylinder 12 to complete the dehydration process according to a preset dehydration cycle. The dehydration process includes a first stage and a second stage after the first stage, and the dehydration beats of the first stage and the second stage are different. The memory 16 stores a first target rotational speed when the first stage inner cylinder 12 rotates with extreme eccentricity and a second target rotational speed when the second stage inner cylinder 12 rotates with extreme eccentricity. The speed sensor 18 is for detecting the first spin speed and the second spin speed of the inner cylinder 12 in accordance with a preset dehydration cycle. The controller 10a is configured to compare the first dehydration rotation speed with the first target rotation speed and compare the second dehydration rotation speed with the second target rotation speed to determine whether the inner cylinder 12 rotates eccentrically, when the first dehydration rotation speed is less than the first target rotation speed or when When the second dehydration rotation speed is smaller than the second target rotation speed, it is determined that there is eccentricity.

In one embodiment of the invention, the pre-set dehydration beat is a stop-and-go cycle, for example 5, 3 means 5 seconds, 3 seconds.

In one embodiment of the present invention, the extreme eccentricity refers to the maximum eccentricity in the case where the washing machine maintains normal dehydration (no collision box, no displacement, low vibration noise).

Further, the controller 10a is further configured to control the inner cylinder 12 to stop and add water to the inner cylinder 12 when the first dehydration rotation speed is less than the first target rotation speed, and when the first dehydration rotation speed is greater than or equal to the first target rotation speed, The control motor 14 drives the inner cylinder 12 to continue to rotate until the first stage is completed and then enters the second stage.

Further, after the motor 14 drives the inner cylinder 12 to continue to rotate into the second stage, the controller 10a compares the magnitudes of the second spin speed and the second target speed, and when the second spin speed is less than the second target speed, the controller 10a controls The inner cylinder 12 is stopped and water is added to the inner cylinder 12 to divert the load. When the second dehydration rotation speed is greater than or equal to the second target rotation speed, the controller 10a controls the inner cylinder 12 to rotate, and is normally dehydrated.

Specifically, in the washing machine of one embodiment of the present invention, the control process for determining the eccentricity is specifically as follows:

(1) The load is placed in the inner cylinder 12 to be dehydrated in accordance with a predetermined dehydration tact.

(2) The first dehydration rotational speed of the inner cylinder 12 rotating in the first stage is detected by the speed sensor 18. In one embodiment of the invention, the speed sensor 18 is mounted at a particular location on the washing machine, such as a rotating member or connecting member of a pulley, motor, center shaft, or the like.

(3) The controller 10a compares the first dehydration rotation speed with the magnitude of the first target rotation speed, wherein the first target rotation speed is the dehydration rotation speed when the inner cylinder 12 exhibits the limit eccentricity in the first stage.

(4) When the first dehydration rotation speed is smaller than the first target rotation speed, it is determined that there is eccentricity, and the rotation of the inner cylinder 12 is stopped, and the load is diverged than the refilling of the inner cylinder 12.

When the first dehydration rotation speed is greater than or equal to the first target rotation speed, the inner cylinder 12 is normally dehydrated and rotated until the second stage is completed after completing the first stage.

(5) The second dehydration rotational speed of the inner cylinder 12 rotating in the second stage is detected by the speed sensor 18.

(6) The controller 10a compares the second dehydration rotation speed with the second target rotation speed, wherein the second target rotation speed is the dehydration rotation speed when the inner cylinder 12 is in the limit eccentricity of the rotation in the second stage;

(7) When the second dehydration rotation speed is greater than or equal to the second target rotation speed, it is determined that there is no eccentricity, and the inner cylinder 12 is normally dehydrated.

Specifically, in the case of no eccentricity or small eccentricity, the vibration of the inner cylinder 12 is small, the movement trajectory of the inner cylinder 12 is not abnormal, and the second rotation speed rpm(n) can reach or exceed the second target rotation speed RPM(n). Can be dehydrated normally.

(8) When the second dehydration rotation speed is smaller than the second target rotation speed, it is determined that there is eccentricity, and the rotation of the inner cylinder 12 is stopped, and the water is shaken to the inner cylinder 12.

Further, in an embodiment of the present invention, the method further includes: an alarm device 600, configured to stop the rotation of the inner cylinder 12 and perform an alarm when the controller 500 repeatedly determines that the number of occurrences of eccentricity is greater than a preset threshold. In one embodiment of the invention, the preset threshold is three.

For example, the method of the embodiment of the present invention is applied to a 16KG pulsator laundry, and the speed sensor 400 is mounted on the motor 200, as shown in FIG. Figure 3 is a graph showing the rotational speed of the inner cylinder under different eccentricities detected by the speed sensor in real time.

According to the preset dehydration beat (beat is: 5, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 2, 5; 2, 5 ;2,5;2,5;2,5;3,3;3,3;1,2;1,2;1,2;1,2;1,2;4,5;7,5;120 , 2; 120, 5; 15, 0, 0, 0,) driving the inner cylinder 100 to rotate for dehydration, and the first target speed and the second phase of the dehydration beat are respectively set to two target rotational speeds: a first target rotational speed RPM1, The second target speed RPM2.

In the first stage, after running the dehydration beats 5,3;1,3;1,3;1,3;1,3;1,3;1,3;1,3, if rpm1≥RPM1, then enter the first Two-stage decision. If rpm1 < RPM1, it is judged to be eccentric, and it cannot be dehydrated normally. It is necessary to re-enter the water to shake the load.

If rpm1 ≥ RPM1, after entering the second stage, the dehydration beats 5, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 5;2,5;2,5;2,5;2,5;3,3;3,3;1,2;1,2;1,2;1,2;1,2, if rpm2≥ RPM2 is judged to be non-eccentric and can be dehydrated normally. If rpm2 < RPM2, it is judged that there is eccentricity, and it is not possible to dehydrate normally. It is necessary to re-flow the water into the inner cylinder to shake the load.

According to the washing machine of the embodiment of the present invention, the motor-driven inner cylinder rotates and dehydrates according to a predetermined dehydration tempo, and after detecting the spin-drying speed of the inner cylinder rotation by the speed sensor, the controller compares the spin-drying speed with the target rotational speed stored in the memory, thereby judging the load. The eccentricity. The washing machine of the invention overcomes the disadvantages of being unable to hit the door switch due to the uncertainty of the movement track of the inner cylinder, and has high dewatering performance.

A method for determining load eccentricity of a washing machine according to an embodiment of the second aspect of the present invention, as shown in FIG. 4, includes the following steps: The load is placed in the inner cylinder of the washing machine and the inner cylinder is driven to rotate according to a predetermined dehydration cycle to complete the dehydration process. The dehydration process includes the first stage and the second stage after the first stage, the dehydration of the first stage and the second stage. The beat is different; detecting the first spin speed of the inner cylinder in the first stage and the second spin speed in the second stage; comparing the magnitude of the first spin speed with the first target speed and comparing the second dewatering speed with the second target speed The size of the first target rotation speed is the dehydration rotation speed when the inner cylinder is in the first stage, and the second target rotation speed is the dehydration rotation speed when the inner cylinder has the extreme eccentricity in the second stage; when the first dehydration rotation speed is smaller than the first At the target rotational speed or when the second spin-drying rotational speed is less than the second target rotational speed, it is determined that there is eccentricity.

Specifically, in an embodiment of the present invention, in step S1,

The dehydration process is completed by placing the load in the inner cylinder of the washing machine according to a predetermined dehydration cycle to complete the dehydration process. The dehydration process includes a first stage and a second stage after the first stage, and the dehydration beats of the first stage and the second stage are different. Among them, the dehydration beat is a beat for dehydration of the inner cylinder of the washing machine, and the setting of the specific beat is set according to different washing machine models. In general, the dehydration beat is a stop-and-go cycle, for example, 5, 3 is 5 seconds, 3 seconds.

In step S2, the first dehydration rotation speed of the inner cylinder in the first stage and the second dehydration rotation speed in the second stage are detected.

Specifically, the first dehydration rotation speed of the inner cylinder in the first stage and the second dehydration rotation speed in the second stage are respectively detected by the speed sensor. In one embodiment of the invention, the speed sensor is mounted at a particular location on the washing machine, such as a rotating member or connecting member of a pulley, motor, center shaft, or the like.

Step S3, comparing the magnitude of the first dehydration rotation speed with the first target rotation speed to compare the second dehydration speed with the second target rotation speed, wherein the first target rotation speed is the dehydration rotation speed when the inner cylinder is in the first stage, the limit rotation speed is the first stage The second target rotation speed is the dehydration rotation speed when the inner cylinder is in the second stage and the limit eccentricity occurs.

Specifically, the extreme eccentricity refers to the maximum eccentricity in the case where the washing machine maintains normal dehydration (no collision box, no displacement, and low vibration noise).

In step S4, when the first dehydration rotation speed is less than the first target rotation speed, it is determined that there is eccentricity. The inner cylinder stops rotating and re-energizes the load to the inner cylinder.

Further, when the first dehydration rotation speed is greater than or equal to the first target rotation speed, the inner cylinder is normally dehydrated and rotated until the second stage is completed after completing the first stage.

Further, after the inner cylinder is normally dehydrated and rotated into the second stage, the magnitudes of the second dehydration rotation speed and the second target rotation speed are compared.

If the second dehydration rotation speed is greater than or equal to the second target rotation speed, it is determined that there is no eccentricity, and the inner cylinder continues to rotate for normal dehydration.

Specifically, in the case of no eccentricity or small eccentricity, the vibration of the inner cylinder is small, the movement trajectory of the inner cylinder is not abnormal, and the second rotation speed rpm(n) can reach or exceed the second target rotation speed RPM(n), which is normal. Dehydration.

When the second dehydration rotation speed is less than the second target rotation speed, it is determined that there is eccentricity, the inner cylinder is stopped, and the water is shaken to the inner cylinder to shake the load. Specifically, in the case where the eccentricity or the eccentricity is large, the eccentricity causes the vibration of the inner cylinder to be large, and the vibration of the inner cylinder hinders the normal rise of the rotational speed, so that the rotational speed rpm(n) cannot reach the target rotational speed RPM(n).

Further, if the number of times of eccentricity determined by the above steps S1 to S4 is repeatedly performed to be greater than a preset threshold, the rotation of the inner cylinder is stopped and an alarm is issued. In one embodiment of the invention, the preset threshold is three.

For example, the method of the embodiment of the present invention is applied to a 16KG pulsator laundry, and the speed sensor is mounted on the motor, as shown in FIG. Figure 3 is a graph showing the rotational speed of the inner cylinder under different eccentricities detected by the speed sensor in real time.

According to the preset dehydration beat (beat is: 5, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 2, 5; 2, 5 ;2,5;2,5;2,5;3,3;3,3;1,2;1,2;1,2;1,2;1,2;4,5;7,5;120 , 2; 120, 5; 15, 0, 0, 0,) drive the inner cylinder for dehydration, and set two target speeds for the first stage and the second stage of the dehydration beat: first target speed RPM1, second Target speed RPM2.

If rpm1 ≥ RPM1, after entering the second stage, the dehydration beats 5, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 1, 3; 5;2,5;2,5;2,5;2,5;3,3;3,3;1,2;1,2;1,2;1,2;1,2, if rpm2≥ RPM2 is judged to be non-eccentric and can be dehydrated normally. If rpm2 < RPM2, it is judged that there is eccentricity, and it is not possible to dehydrate normally. It is necessary to re-enter the water to shake the load.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

A washing machine, comprising:

Inner cylinder

a motor for driving the inner cylinder to complete a dehydration process according to a preset dehydration cycle, the dehydration process comprising a first phase and a second phase after the first phase, the first phase and the first The two stages of the dehydration beat are different;

a first target rotational speed when the inner cylinder rotates with a limit eccentricity in the first stage and a second target rotational speed when the inner cylinder rotates to a limit eccentricity in the second phase;

a speed sensor, configured to detect a first spin speed and a second spin speed of the inner cylinder rotating according to the preset dehydration beat;

a controller, configured to compare the first dehydration rotation speed with the first target rotation speed and compare the second dehydration rotation speed with the second target rotation speed to determine whether the inner cylinder rotation is eccentric, when The first dehydration rotation speed is less than the first target rotation speed or when the second dehydration rotation speed is less than the second target rotation speed, it is determined that there is eccentricity.
The washing machine according to claim 1, wherein the controller is further configured to control the inner cylinder to stop and add water to the inner cylinder when the first dehydration rotation speed is less than the first target rotation speed Dispersing the load, and controlling the motor to drive the inner cylinder to continue to rotate when the first dehydration rotation speed is greater than or equal to the first target rotation speed until entering the second stage after completing the first stage.
The washing machine according to any one of claims 1 to 2, wherein the controller is further configured to control the inner cylinder to stop and when the second dehydration rotation speed is less than the second target rotation speed The inner cylinder is filled with water to shake the load.
The washing machine according to any one of claims 1 to 3, wherein the washing machine further comprises:

The alarm device is configured to perform an alarm when the controller determines that the number of occurrences of eccentricity is greater than a preset threshold.
The washing machine according to claim 4, wherein said preset threshold is three.
A method for determining load eccentricity of a washing machine, comprising the steps of:

Discharging the load into the inner cylinder of the washing machine and driving the inner cylinder to rotate and dehydrate according to a predetermined dehydration cycle, the dehydration process comprising a first stage and a second stage after the first stage, The first stage is different from the dehydration beat of the second stage;

Detecting a first dehydration rotation speed of the inner cylinder in the first stage and a second dehydration rotation speed in the second stage;

Comparing the magnitude of the first dehydration rotation speed with the first target rotation speed and comparing the magnitudes of the second dehydration speed and the second target rotation speed, wherein the first target rotation speed is within the first stage a dehydration rotation speed when the cylinder has a limit eccentricity, and the second target rotation speed is a dehydration rotation speed when the inner cylinder is in a limit eccentricity in the second stage;

When the first dehydration rotation speed is less than the first target rotation speed or when the second dehydration rotation speed is less than the second target rotation speed, it is determined that there is eccentricity.
The method of claim 6 further comprising: controlling said inner cylinder to stop and add water to a dithering load to said inner cylinder when said first spin speed is less than said first target speed, And controlling the inner cylinder to continue rotating when the first dehydration rotation speed is greater than or equal to the first target rotation speed until entering the second stage after completing the first stage.
The method according to any one of claims 6 or 7, further comprising: controlling the inner cylinder to stop and add water to the inner cylinder when the second dehydration rotation speed is less than the second target rotation speed Bulk load.
The method according to any of claims 6-8, further comprising: performing alarm processing if it is determined that the number of times of eccentricity is greater than a preset threshold.
The method of any of claims 6-9, wherein the predetermined threshold is three.