阅读说明：本技术 洗衣机脱水方法及洗衣机 (Washing machine dehydration method and washing machine ) 是由 栾强利 于 2021-09-09 设计创作，主要内容包括：本申请提供了一种洗衣机脱水方法及洗衣机,该方法包括：获取洗衣机内筒中负载在洗衣机脱水过程中的偏心位置和偏心量；基于偏心位置和偏心量,确定内筒的预脱水转速,并基于预脱水转速控制内筒转动,以对负载进行预脱水；获取预脱水后负载在洗衣机脱水过程中的预脱水后偏心位置和预脱水后偏心量；基于预脱水后偏心位置和预脱水后偏心量,确定洗衣机内筒的目标转速,并控制内筒以目标转速进行转动,以对预脱水后负载进行正式脱水。(The application provides a washing machine dehydration method and a washing machine, wherein the method comprises the following steps: acquiring the eccentric position and the eccentric amount of a load in the inner drum of the washing machine in the dehydration process of the washing machine; determining the pre-dehydration rotating speed of the inner cylinder based on the eccentric position and the eccentric amount, and controlling the inner cylinder to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load; acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine; and determining the target rotating speed of the inner barrel of the washing machine based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, and controlling the inner barrel to rotate at the target rotating speed so as to carry out formal dehydration on the pre-dehydrated load.)

1. A dehydration method of a washing machine, characterized by comprising:

acquiring the eccentric position and the eccentric amount of a load in the inner drum of the washing machine in the dehydration process of the washing machine;

determining the pre-dehydration rotating speed of the inner barrel based on the eccentric position and the eccentric amount, and controlling the inner barrel to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load;

acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine;

and determining the target rotating speed of the inner barrel of the washing machine based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, and controlling the inner barrel to rotate at the target rotating speed so as to carry out formal dehydration on the pre-dehydrated load.

2. The dewatering method of a washing machine as claimed in claim 1, wherein the obtaining of the eccentric position and the eccentric amount of the load in the inner drum of the washing machine during the dewatering process comprises:

monitoring the inner cylinder rotating speed of the inner cylinder;

if the rotating speed of the inner barrel reaches the eccentric detection rotating speed, measuring the vibration displacement generated by the vibration of the outer barrel of the washing machine in the dehydration process of the washing machine;

determining the eccentric position and the eccentric amount based on the vibration displacement.

3. The dehydrating method of a washing machine according to claim 2, wherein before measuring the vibration displacement of the tub of the washing machine due to vibration during the dehydrating process of the washing machine, the method comprises:

and if the washing machine is detected to shake the load, monitoring the rotating speed of the inner drum.

4. The dewatering method of a washing machine according to claim 2, wherein said determining the eccentric position based on the vibratory displacement comprises:

measuring the maximum radial displacement of the outer cylinder generated by vibration along the radial direction of the outer cylinder;

measuring the maximum axial displacement generated by the vibration of the outer cylinder along the axial direction of the outer cylinder;

if the ratio of the maximum radial displacement to the maximum radial axial displacement reaches a set vibration displacement ratio, determining the eccentric position as front eccentricity;

and if the ratio of the maximum radial displacement to the maximum radial axial displacement is lower than the set vibration displacement ratio, determining the eccentric position as the rear eccentricity.

5. The dewatering method of a washing machine according to claim 2, wherein said determining the eccentricity amount based on the vibratory displacement includes:

if the vibration displacement is lower than a first displacement threshold value, determining that the eccentricity is small eccentricity;

if the vibration displacement reaches the first displacement threshold value and is lower than a second displacement threshold value, determining that the eccentricity amount is medium eccentricity, wherein the first displacement threshold value is smaller than the second displacement threshold value;

and if the vibration displacement reaches the second displacement threshold value, determining that the eccentricity is large eccentricity.

6. The dehydration method of washing machine according to claim 1, wherein said obtaining pre-dehydration eccentric position and pre-dehydration eccentric amount of pre-dehydration load in the dehydration process of washing machine comprises:

adjusting the rotation speed of the inner cylinder from the pre-dehydration rotation speed to an eccentricity detection rotation speed;

measuring the pre-dehydration displacement generated by the vibration of the outer cylinder of the washing machine when the eccentric detection rotating speed is applied to the outer cylinder;

determining the pre-dehydration eccentric position and the pre-dehydration eccentric amount based on the pre-dehydration displacement.

7. The dehydrating method of a washing machine as claimed in claim 1, wherein the eccentric position includes a front eccentricity and a rear eccentricity, and the method includes, before controlling the drum rotation speed based on the pre-dehydration rotation speed:

if the eccentric position is eccentric in the front and the eccentric amount is lower than a front eccentric amount threshold value, determining the pre-dehydration rotating speed of the inner drum of the washing machine;

and if the eccentric position is eccentric at the back and the eccentric amount is lower than the threshold value of the back eccentric amount, determining the pre-dehydration rotating speed of the inner drum of the washing machine.

8. The dehydrating method of a washing machine according to claim 7,

if the eccentric position is eccentric in the front, the eccentric amount reaches the front eccentric amount threshold value, and the dehydration times of the washing machine are lower than the set dehydration times, the load is subjected to shaking operation;

if the eccentric position is eccentric at the back, the eccentric amount reaches the threshold value of the back eccentric amount, and the dehydration times of the washing machine are lower than the set dehydration times, the load is subjected to shaking operation;

acquiring the eccentric position and the eccentric amount of the load after a shaking-out operation.

9. The dehydrating method of a washing machine according to claim 7,

if the eccentric position is eccentric in the front, the eccentric amount reaches the front eccentric amount threshold value, and the dehydration times of the washing machine reach the set dehydration times, stopping dehydration;

and if the eccentric position is eccentric at the back, the eccentric amount reaches the rear eccentric amount threshold value, and the dehydration times of the washing machine reach the set dehydration times, stopping dehydration.

10. A washing machine, characterized by comprising:

a washing machine body comprising a box body, an outer barrel arranged in the box body, an inner barrel arranged in the outer barrel, and a controller for controlling the rotation of the inner barrel, wherein the barrel bottom of the inner barrel is connected with the barrel bottom of the outer barrel, and the controller is used for executing the method of any one of the claims 1-9;

and the vibration displacement sensor is arranged on the outer barrel, is connected with the controller and is used for measuring the vibration displacement of the outer barrel under the control of the controller.

Technical Field

The application relates to the field of electrical equipment, in particular to a washing machine dehydration method and a washing machine.

Background

With the gradual improvement of living standard of people, the washing machine has become an indispensable electrical appliance for each household, and the dewatering function of the washing machine is more and more emphasized by users.

The washing machine usually dehydrates the load of the washing machine by rotating the inner drum of the washing machine, but the dehydration effect is affected by eccentricity generated in the dehydration process of the washing machine.

Disclosure of Invention

An object of the present application is to solve the problem that the eccentricity of a washing machine in the prior art affects the dehydration effect.

In order to solve the above problems, the present application provides a dehydration method of a washing machine, the method including: acquiring the eccentric position and the eccentric amount of a load in the inner drum of the washing machine in the dehydration process of the washing machine; determining the pre-dehydration rotating speed of the inner barrel based on the eccentric position and the eccentric amount, and controlling the inner barrel to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load; acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine; and determining the target rotating speed of the inner barrel of the washing machine based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, and controlling the inner barrel to rotate at the target rotating speed so as to carry out formal dehydration on the pre-dehydrated load.

In another aspect of the present application, there is provided a washing machine including: the washing machine body comprises a box body, an outer barrel arranged in the box body, an inner barrel arranged in the outer barrel and a controller for controlling the inner barrel to rotate, wherein the barrel bottom of the inner barrel is connected with the barrel bottom of the outer barrel; the vibration displacement sensor is arranged on the outer cylinder and is connected with the controller; the controller is configured to: acquiring the eccentric position and the eccentric amount of a load in the inner drum of the washing machine in the dehydration process of the washing machine; determining the pre-dehydration rotating speed of the inner barrel based on the eccentric position and the eccentric amount, and controlling the inner barrel to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load; acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine; and determining the target rotating speed of the inner barrel of the washing machine based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, and controlling the inner barrel to rotate at the target rotating speed so as to carry out formal dehydration on the pre-dehydrated load.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: monitoring the inner cylinder rotating speed of the inner cylinder; if the rotating speed of the inner barrel reaches the eccentric detection rotating speed, measuring the vibration displacement generated by the vibration of the outer barrel of the washing machine in the dehydration process of the washing machine; determining the eccentric position and the eccentric amount based on the vibration displacement.

In one embodiment of the present application, based on the foregoing solution, before measuring a vibration displacement generated by vibration of the tub of the washing machine during dehydration of the washing machine, the controller is configured to: and if the washing machine is detected to shake the load, monitoring the rotating speed of the inner drum.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: measuring the maximum radial displacement of the outer cylinder generated by vibration along the radial direction of the outer cylinder; measuring the maximum axial displacement generated by the vibration of the outer cylinder along the axial direction of the outer cylinder; if the ratio of the maximum radial displacement to the maximum radial axial displacement reaches a set vibration displacement ratio, determining the eccentric position as front eccentricity; and if the ratio of the maximum radial displacement to the maximum radial axial displacement is lower than the set vibration displacement ratio, determining the eccentric position as the rear eccentricity.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: if the vibration displacement is lower than a first displacement threshold value, determining that the eccentricity is small eccentricity; if the vibration displacement reaches the first displacement threshold value and is lower than a second displacement threshold value, determining that the eccentricity amount is medium eccentricity, wherein the first displacement threshold value is smaller than the second displacement threshold value; and if the vibration displacement reaches the second displacement threshold value, determining that the eccentricity is large eccentricity.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: adjusting the rotation speed of the inner cylinder from the pre-dehydration rotation speed to an eccentricity detection rotation speed; measuring the pre-dehydration displacement generated by the vibration of the outer cylinder of the washing machine when the eccentric detection rotating speed is applied to the outer cylinder; determining the pre-dehydration eccentric position and the pre-dehydration eccentric amount based on the pre-dehydration displacement.

In an embodiment of the present application, based on the foregoing, the eccentric position includes a front eccentric and a rear eccentric, and before controlling the inner drum rotation speed based on the pre-spin rotation speed, the controller is configured to: if the eccentric position is eccentric in the front and the eccentric amount is lower than a front eccentric amount threshold value, determining the pre-dehydration rotating speed of the inner drum of the washing machine; and if the eccentric position is eccentric at the back and the eccentric amount is lower than the threshold value of the back eccentric amount, determining the pre-dehydration rotating speed of the inner drum of the washing machine.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: if the eccentric position is eccentric in the front, the eccentric amount reaches the front eccentric amount threshold value, and the dehydration times of the washing machine are lower than the set dehydration times, the load is subjected to shaking operation; if the eccentric position is eccentric at the back, the eccentric amount reaches the threshold value of the back eccentric amount, and the dehydration times of the washing machine are lower than the set dehydration times, the load is subjected to shaking operation; acquiring the eccentric position and the eccentric amount of the load after a shaking-out operation.

In an embodiment of the present application, based on the foregoing solution, the controller is configured to: if the eccentric position is eccentric in the front, the eccentric amount reaches the front eccentric amount threshold value, and the dehydration times of the washing machine reach the set dehydration times, stopping dehydration; and if the eccentric position is eccentric at the back, the eccentric amount reaches the rear eccentric amount threshold value, and the dehydration times of the washing machine reach the set dehydration times, stopping dehydration.

According to the technical scheme, the method has at least the following advantages and positive effects:

the dehydration method of the washing machine comprises the steps of obtaining the eccentric position and the eccentric amount of a load in an inner barrel of the washing machine in the dehydration process of the washing machine; determining the pre-dehydration rotating speed of the inner cylinder based on the eccentric position and the eccentric amount, and controlling the inner cylinder to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load, namely adjusting the pre-dehydration process according to the eccentric position and the eccentric amount, and reducing the influence of eccentricity on the pre-dehydration process; acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine; the target rotating speed of the inner barrel of the washing machine is determined based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, compared with the method that the eccentric position and the eccentric amount are detected only before pre-dehydration, the determined target rotating speed can be more accurate, the inner barrel is controlled to rotate at the target rotating speed, formal dehydration is carried out on the pre-dehydration load, the influence of eccentricity on the formal dehydration process can be reduced, and therefore a better dehydration effect can be achieved.

Drawings

Fig. 1 schematically illustrates a structural view of a washing machine according to an embodiment of the present application;

FIG. 2 schematically illustrates an eccentric position schematic according to an embodiment of the present application;

FIG. 3 schematically illustrates a flow chart of a washing machine dehydration method according to one embodiment of the present application;

FIG. 4 schematically illustrates a dehydration process of a washing machine according to an embodiment of the present application;

fig. 5 schematically shows a flow chart of a dewatering method of a washing machine according to an embodiment of the present application.

Detailed Description

Exemplary embodiments that embody features and advantages of the present application will be described in detail in the following description. It is to be understood that the present application is capable of various modifications in various embodiments without departing from the scope of the application, and that the description and drawings are to be taken as illustrative and not restrictive in character.

In one embodiment of the present application, there is provided a washing machine including a washing machine body, as shown in fig. 1, fig. 1 schematically shows a structural schematic view of the washing machine according to one embodiment of the present application, and the washing machine body may include a window 1, a door seal 2, an outer tub 3, an inner tub 4, a cabinet 5, a suspension spring 7, a motor 8, and a damper 9. The window 1 is arranged on the box body 5 and is connected with the outer drum 3 of the washing machine through a door seal 2, and the door seal 2 can be made of rubber materials; the outer cylinder 3 is positioned in the box body 5, and the outer cylinder 3 is connected with the box body 5 through a hanging spring 7 and a shock absorber 9; the inner cylinder 4 is positioned in the outer cylinder 3 and is connected with the motor 8 through a transmission mechanism, a transmission shaft of the transmission mechanism is connected with the center of a circle at the bottom of the inner cylinder 4, the transmission shaft of the transmission mechanism is connected with the center of a circle at the bottom of the outer cylinder 3, and the shaft of the inner cylinder 4 and the shaft of the outer cylinder 3 are on the same straight line; the vibration sensor 6 is provided on the outer tub 3, and the vibration sensor 6 is connected to the controller. The controller comprises a washing machine main control device and a motor control device, the washing machine main control device drives a washing machine motor to rotate through the motor control device, meanwhile, vibration displacement of the outer barrel 3 can be fed back to the washing machine main control device, and the main control device controls the washing machine to dewater according to the washing machine dewatering method.

In one embodiment of the present application, the vibration sensor 6 is disposed on the outer sidewall of the outer cylinder 3 to prevent the vibration sensor 6 from affecting the rotation of the inner cylinder 4.

In one embodiment of the present application, the transmission mechanism may be a bearing structure located at the rear side of the outer cylinder, and the transmission mechanism is also used for providing a rigid support for the inner cylinder, the inventor finds that the cantilever-like structure causes that the eccentric amount generates a larger moment at the opening end of the outer cylinder of the washing machine far away from the transmission mechanism than at the closed end of the outer cylinder close to the transmission mechanism under the condition of the same eccentric amount, and causes that the vibration noise is more remarkable at the eccentric position close to the opening end than at the eccentric position close to the closed end, namely the noise is related to both the eccentric position and the eccentric amount, therefore, the present application provides a dewatering method of the washing machine, the pre-dewatering rotating speed and the target rotating speed of the inner cylinder are determined according to the eccentric position and the eccentric amount of the washing machine, and the noise of the washing machine in the pre-dewatering process and the formal dewatering process can be reduced.

In one embodiment of the present application, when the eccentric position is near the open end, it may be determined that the eccentric position at this time is a front eccentricity; when the eccentric position is close to the closed end, the eccentric position at the moment can be determined as rear eccentricity; as shown in fig. 2, fig. 2 schematically illustrates an eccentric position diagram according to an embodiment of the present application, which may include a forward eccentricity and a rearward eccentricity, i.e., a middle eccentricity in the middle of the inner tube, in addition to the forward eccentricity and the rearward eccentricity. The axial displacement of the outer cylinder along the parallel radial direction parallel to the ground can be represented by Y and the axial displacement of the outer cylinder by X.

In an embodiment of the present application, a washing machine dehydration method is provided as shown in fig. 3, and fig. 3 schematically shows a washing machine dehydration method flowchart according to an embodiment of the present application, and an execution subject of the washing machine dehydration method may be a washing machine, a controller in the washing machine, or a main control device in the washing machine.

Referring to fig. 3, the dehydration method of the washing machine at least includes steps S310 to S340, which are described in detail as follows:

in step S310, the eccentric position and the eccentric amount of the load in the inner tub of the washing machine during the dehydration process of the washing machine are obtained.

In one embodiment of the present application, the vibration displacement of the tub of the washing machine generated by vibration during the dehydration of the washing machine may be measured; based on the vibration displacement, an eccentric position and an eccentric amount are determined. The inventor finds that the vibration displacement of the outer cylinder is generated by the rotation of the inner cylinder, the vibration displacement of the outer cylinder in a certain direction can reflect the vibration magnitude of the inner cylinder in a certain direction, and the eccentricity of the load in the inner cylinder influences the vibration of the inner cylinder, so that the eccentric position and the eccentric amount of the inner cylinder can be determined according to the vibration displacement of the outer cylinder.

In one embodiment of the present application, the vibrational displacement may comprise a parallel radial displacement Y of the outer drum generated by vibration in a radial direction parallel to the ground, and an axial displacement X of the outer drum generated by vibration in the radial direction. In other embodiments of the present application, the vibrational displacement may further comprise a vertical radial displacement Z of the outer cylinder generated by vibration in a radial direction perpendicular to the ground.

In one embodiment of the present application, the inner barrel rotational speed of the inner barrel can be monitored; if the rotating speed of the inner drum reaches the eccentric detection rotating speed, measuring the vibration displacement generated by the vibration of the outer drum of the washing machine in the dehydration process of the washing machine; based on the vibration displacement, the eccentric position and the eccentric amount are determined, and the measured eccentric position and the measured eccentric amount can be more accurate.

In an embodiment of the application, can be if it shakes the operation that looses to the load to detect washing machine, then monitor the inner tube rotational speed, in washing machine dehydration, can be when the vibration displacement reaches the displacement threshold value, then shake the operation that looses to the load, can avoid excessive eccentric influence dehydration process.

In one embodiment of the present application, the eccentric position may be determined based on parallel radial and axial displacements of the vibrational displacements.

In one embodiment of the present application, the maximum parallel radial displacement of the vibrational displacements may be measured, denoted as Y1 max; the maximum axial displacement in the vibratory displacement, denoted X1max, can be measured; as shown in table 1, if the ratio of the maximum radial displacement to the maximum radial axial displacement reaches the set vibration displacement ratio N1, it is determined that the eccentric position is the front eccentricity; if the ratio of the maximum radial displacement to the maximum radial axial displacement is lower than the set vibration displacement ratio N1, the eccentric position is determined to be rear eccentricity, wherein N1 is a constant, and is related to parameters such as the structure of the washing machine, the position of a sensor, the set limit eccentric amount and the like, and can be obtained according to experiments.

TABLE 1 correspondence of vibratory displacement to eccentric position

Numerical relationship of Y1max and X1max	Eccentric position
		Y1max/X1max>＝N1	Front eccentric center
Y1max/X1max<N1	Rear eccentric center

In one embodiment of the present application, the eccentric position may be determined based on a vertical radial displacement and an axial displacement among the vibrational displacements.

In one embodiment of the present application, the eccentric position may be determined based on a vertical radial displacement, a horizontal radial displacement, and an axial displacement among the vibration displacements.

In one embodiment of the present application, the eccentricity amount may be determined to be a small eccentricity if the vibration displacement is lower than a first displacement threshold; if the vibration displacement reaches a first displacement threshold value and is lower than a second displacement threshold value, determining that the eccentricity is medium eccentricity, wherein the first displacement threshold value is smaller than the second displacement threshold value; and if the vibration displacement reaches the second displacement threshold value, determining that the eccentricity is large.

In one embodiment of the present application, the eccentricity amount may include a guard eccentricity in addition to the small eccentricity, the middle eccentricity, and the large eccentricity, and it may be determined that the eccentricity amount reaches the guard eccentricity when the vibration displacement is greater than a third displacement threshold, wherein the third displacement threshold is greater than the second displacement threshold. The third displacement threshold may be set as required, and may be determined when the eccentricity is detected to reach the protection eccentricity, and the washing machine triggers the displacement protection to perform the protection action. The protective action may be to stop the dehydration or to shake the load away. When the eccentricity is detected to reach the protection eccentricity, whether the dewatering frequency is over-limited or not is detected, if the dewatering frequency is over-limited, the dewatering is stopped, and if the dewatering frequency is not over-limited, the shaking-up operation is carried out.

In an embodiment of the present application, when the eccentricity positions are different, the first displacement threshold, the second displacement threshold and the third displacement threshold for determining the eccentricity amount may be different, and may be obtained according to a permitted eccentricity test of the washing machine at the pre-spin-drying rotation speed, for example, when the eccentricity position is the front eccentricity, the first displacement threshold may be a, the second displacement threshold may be b, and the third displacement threshold may be c; when the off-center position is rear off-center, the first displacement threshold may be e, the second displacement threshold may be f, and the third displacement threshold may be g.

In step S320, a pre-dehydration rotation speed of the inner drum is determined based on the eccentric position and the eccentric amount, and the rotation of the inner drum is controlled based on the pre-dehydration rotation speed to pre-dehydrate the load.

In an embodiment of the application, the corresponding relation between the eccentric position, the eccentric amount and the pre-dehydration rotating speed can be determined through experiments or experiences, and after the eccentric position and the eccentric amount are obtained, the pre-dehydration rotating speed is determined by searching the corresponding relation.

In an embodiment of the application, the corresponding relation between the eccentric position, the eccentric amount, the vibration displacement and the pre-dehydration rotating speed can be determined through experiments or experiences, and after the vibration displacement is obtained and the eccentric position and the eccentric amount are determined according to the vibration displacement, the pre-dehydration rotating speed is determined by searching the corresponding relation. Taking the displacement measurement position close to the opening end of the inner cylinder as an example, table 2 schematically shows a corresponding relationship of an eccentric position, an eccentric amount, a vibration displacement and a pre-dehydration rotating speed in the application, wherein the vibration displacement can be represented by a maximum parallel radial displacement Y1 max. In other embodiments of the present application, the displacement measurement position may also be located near the closed end of the inner barrel, and the vibrational displacement may also be expressed as a maximum axial displacement X1max or a maximum vertical radial displacement.

TABLE 2 corresponding relationship between eccentric position, eccentric amount, vibration displacement and pre-dewatering rotation speed

In one embodiment of the present application, the dewatering is performed at the set pre-dewatering rotation speed when the eccentricity reaches the set eccentricity.

In step S330, a pre-dehydration eccentric position and a pre-dehydration eccentric amount of the pre-dehydration load in the dehydration process of the washing machine are acquired.

In one embodiment of the application, the dehydration can be continued after the pre-dehydration, and the rotating speed of the inner cylinder can be adjusted from the pre-dehydration rotating speed to the eccentricity detection rotating speed; measuring the pre-dehydration displacement generated by the vibration of the outer cylinder when the outer cylinder of the washing machine eccentrically detects the rotating speed; and determining the pre-dehydration eccentric position and the pre-dehydration eccentric amount based on the pre-dehydration displacement.

In one embodiment of the present application, the eccentricity detection rotation speed may be lower than the pre-dehydration rotation speed, so that the washing machine can reach the eccentricity detection rotation speed after being started, and the adjustment process of the rotation speed is simpler. For example, the eccentricity detection rotational speed may be about 100 Revolutions Per minute (rpm), and 75rpm to 150rpm may be selected.

In one embodiment of the present application, the maximum horizontal radial displacement Y2max of the pre-dewatering displacements may be measured; the maximum axial displacement in the displacement after pre-dehydration can be measured; if the ratio of the maximum horizontal radial displacement to the maximum radial axial displacement reaches a preset displacement ratio N2 after pre-dehydration, determining the eccentric position as front eccentricity; and if the ratio of the maximum horizontal radial displacement to the maximum radial axial displacement is lower than the set displacement ratio N2 after pre-dehydration, determining the eccentric position after pre-dehydration as the rear eccentricity.

In one embodiment of the present application, the pre-dehydration eccentricity amount may be determined to be a small eccentricity if the pre-dehydration displacement is lower than the fourth displacement threshold; if the displacement after the pre-dehydration reaches a fourth displacement threshold value and the displacement after the pre-dehydration is lower than a fifth displacement threshold value, determining the eccentricity amount after the pre-dehydration as the middle eccentricity, wherein the fourth displacement threshold value is smaller than the fifth displacement threshold value; and if the displacement after the pre-dehydration reaches a fifth displacement threshold value and the displacement after the pre-dehydration is lower than a sixth displacement threshold value, determining the eccentricity amount after the pre-dehydration as the protection eccentricity, wherein the fifth displacement threshold value is smaller than the sixth displacement threshold value.

In an embodiment of the present application, when the eccentricity positions are different, the fourth displacement threshold, the fifth displacement threshold, and the sixth displacement threshold for determining the magnitude of the eccentricity amount after pre-dehydration may be different, and may be obtained according to a test of the allowable eccentricity amount of the washing machine at a target rotation speed, for example, when the eccentricity position is a front eccentricity, the fourth displacement threshold may be h, the fifth displacement threshold may be i, and the sixth displacement threshold may be j; when the off-center position is rear off-center, the fourth displacement threshold may be k, the fifth displacement threshold may be l, and the sixth displacement threshold may be m.

In step S340, a target rotation speed of the inner tub of the washing machine is determined based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, and the inner tub is controlled to rotate at the target rotation speed to perform formal dehydration on the pre-dehydration load.

In an embodiment of the application, the corresponding relationship between the pre-dehydration eccentric position, the pre-dehydration eccentric amount and the target rotation speed may be determined through experiments or experiences, and after the pre-dehydration eccentric position and the pre-dehydration eccentric amount are obtained, the target rotation speed is determined by searching the corresponding relationship.

In an embodiment of the application, a corresponding relationship between the pre-dehydration eccentric position, the pre-dehydration eccentric amount, the pre-dehydration displacement and the target rotation speed may be determined through experiments or experiences, and after the pre-dehydration displacement is obtained and the pre-dehydration eccentric position and the pre-dehydration eccentric amount are determined according to the pre-dehydration displacement, the target rotation speed is determined by searching the corresponding relationship. Taking the displacement measurement position close to the opening end of the inner cylinder as an example, table 3 schematically shows a corresponding relationship among a pre-dehydration eccentric position, a pre-dehydration eccentric amount, a pre-dehydration displacement and a pre-dehydration rotation speed in the present application, wherein the pre-dehydration displacement is represented by a maximum horizontal radial displacement Y2max, wherein the fourth target rotation speed may be 1400rpm, the fifth target rotation speed may be 1000rpm, and the sixth target rotation speed may be 800 rpm. Of course, the displacement measuring position can also be arranged at a position close to the closed end of the inner barrel, and the displacement measuring position can also be arranged at a position close to the middle part of the inner barrel.

TABLE 3 corresponding relationship between pre-dewatering eccentric position, pre-dewatering eccentric amount, pre-dewatering displacement and target rotation speed

In the embodiment of fig. 3, the eccentric position and the eccentric amount of the load in the inner drum of the washing machine in the dewatering process of the washing machine are obtained; determining the pre-dehydration rotating speed of the inner cylinder based on the eccentric position and the eccentric amount, and controlling the inner cylinder to rotate based on the pre-dehydration rotating speed so as to pre-dehydrate the load, namely adjusting the pre-dehydration process according to the eccentric position and the eccentric amount, and reducing the influence of eccentricity on the pre-dehydration process; acquiring a pre-dehydration eccentric position and a pre-dehydration eccentric amount of a pre-dehydration load in the dehydration process of the washing machine; the target rotating speed of the inner barrel of the washing machine is determined based on the pre-dehydration eccentric position and the pre-dehydration eccentric amount, compared with the method that the eccentric position and the eccentric amount are detected only before pre-dehydration, the determined target rotating speed can be more accurate, the inner barrel is controlled to rotate at the target rotating speed, formal dehydration is carried out on the pre-dehydration load, the influence of eccentricity on the formal dehydration process can be reduced, and therefore a better dehydration effect can be achieved.

In one embodiment of the present application, before controlling the drum rotation speed based on the pre-dehydration rotation speed, if the eccentric position is the front eccentricity and the eccentricity is lower than the front eccentricity threshold, the pre-dehydration rotation speed of the washing machine drum can be determined; if the eccentric position is eccentric at the back, and the eccentric amount is lower than the threshold value of the rear eccentric amount, the pre-dehydration rotating speed of the inner drum of the washing machine can be determined, namely the threshold value of the front eccentric amount and the threshold value of the rear eccentric amount are used for detecting whether the washing machine triggers displacement protection or not.

In one embodiment of the present application, if the eccentric position is front eccentric, the eccentric amount reaches a front eccentric amount threshold, and the dehydration number of the washing machine is lower than a set dehydration number, the load may be subjected to a shaking operation; if the eccentric position is eccentric at the back, the eccentric amount reaches a back eccentric amount threshold value, and the dehydration times of the washing machine are lower than the set dehydration times, the load can be subjected to shaking-up operation; and acquiring the eccentric position and the eccentric amount of the load after the shaking operation.

In one embodiment of the present application, if the eccentric position is front eccentric, and the eccentric amount reaches a front eccentric amount threshold, and the dehydration number of the washing machine reaches a set dehydration number, the dehydration may be stopped; if the eccentric position is eccentric at the back, the eccentric amount reaches the threshold value of the back eccentric amount, and the dehydration times of the washing machine reach the set dehydration times, the dehydration can be stopped, so as to protect the washing machine.

In an embodiment of the present application, a dewatering process of a washing machine is provided as shown in fig. 4, and fig. 4 schematically shows a dewatering process schematic diagram of the washing machine according to an embodiment of the present application, the dewatering process mainly includes an eccentricity detection process corresponding to an eccentricity detection rotation speed, a pre-dewatering process corresponding to a pre-dewatering rotation speed, and a formal dewatering process corresponding to reaching a target rotation speed. In the eccentricity detection process, the detection of the eccentric position (front eccentricity and rear eccentricity) and the eccentricity (small eccentricity, middle eccentricity and large eccentricity) of the load of the clothes is realized at the eccentricity detection rotating speed (usually about 100 rpm); the pre-dehydration program is to realize the pre-dehydration of the clothes load at the pre-dehydration rotating speed (usually about 400 rpm), which is beneficial to the further detection of the load eccentricity after the pre-dehydration; and the formal dehydration process is to select a target rotating speed to carry out formal dehydration according to the detection result of the deviation position after the pre-dehydration and the deviation amount after the dehydration.

In an embodiment of the present application, a washing machine dehydration method is provided as shown in fig. 5, and fig. 5 schematically shows a washing machine dehydration method flowchart according to an embodiment of the present application, and an execution subject of the washing machine dehydration method may be a washing machine, a controller in the washing machine, or a main control device in the washing machine.

Referring to fig. 5, the dehydration method of the washing machine is described in detail as follows: if the dehydration program is detected to be started, carrying out shaking and scattering operation on the load; after the load shaking operation is finished, the rotating speed of the washing machine is increased to reach an eccentric detection rotating speed (usually about 100 rpm), and the rotating speed is kept stable; after the rotating speed is stable, detecting the vibration displacement of the drum washing machine in three directions of X (axial direction), Y (horizontal radial direction) and Z (vertical radial direction), and realizing the detection of the eccentric position and the eccentric amount of the load according to the vibration displacement; judging whether to trigger displacement protection according to the detected eccentric position and eccentric amount of the clothes load; if the displacement protection is triggered, further detecting whether the dewatering times exceed the limit value requirement, if not, then carrying out the clothes shaking and dewatering process again, if so, ending the dewatering process in advance, and carrying out overrun alarm prompt as required; if the displacement protection is not triggered in the eccentric detection process, pre-dewatering is carried out on the load, the pre-dewatering rotating speed is usually about 400rpm, and the moisture in the load is further discharged through the pre-dewatering program, so that the subsequent eccentric detection is facilitated; after the pre-dehydration process, the rotating speed of the washing machine is reduced to the eccentricity detection rotating speed (usually about 100 rpm) again, and the rotating speed is kept stable; after the rotating speed is stable, detecting the displacement of the washing machine after pre-dehydration in the X, Y and Z directions, and detecting the eccentric position of the load after pre-dehydration and the eccentric amount of the load after pre-dehydration according to the displacement of the washing machine after pre-dehydration. The detection of the pre-dehydrated eccentric position can be realized by comparing the pre-dehydrated displacement in different directions of a displacement sensor on the outer drum of the washing machine, and the pre-dehydrated displacement in X and Y directions can be usually referred to; and determining a target rotating speed according to the pre-dehydration eccentric position and the pre-dehydration eccentric amount detected after the pre-dehydration program, and gradually increasing the rotating speed of the washing machine to the target rotating speed after determining the target rotating speed until the dehydration process is finished.

In an embodiment of the present application, the washing machine may be a drum washing machine, in order to realize effective identification of the eccentric position of the drum washing machine, improve the eccentric detection precision, and reduce the vibration noise of the drum washing machine, the washing machine control method provided by the present application is to install a vibration displacement sensor on the outer drum of the drum washing machine, the sensor vibrates along with the outer drum to generate X, Y, Z vibration displacements in three directions, and by testing the vibration displacements in three motion directions of the vibration displacement sensor X, Y, Z at the eccentric detection rotation speed (usually about 100 rpm), the identification and detection of the load eccentric position and the eccentric amount of the drum washing machine can be simultaneously realized, so as to control the target rotation speed, thereby ensuring the noise of the drum washing machine in the high-speed dehydration process. This application can be simultaneously quick accurate discernment drum type washing machine's eccentric position and eccentric amount through detecting displacement signal under lower rotational speed (about 100 rpm), on the one hand, can discern and control big eccentric sooner, shorten the dehydration time, and on the other hand, according to eccentric position and eccentric amount change, the noise of the high-speed dehydration process of drum type washing machine is effectively guaranteed to the control target rotational speed.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.