CN107653627B - Water quantity detection control method in washing machine and washing machine - Google Patents

Abstract

The invention belongs to the technical field of washing machines, and in particular relates to a method for detecting and controlling the amount of water in a washing machine and a washing machine. The present invention aims to solve the problem that the existing washing machine can only detect the amount of water in the washing machine, but cannot detect whether the amount of water matches the total amount of laundry in the washing tub. To this end, the present invention provides a method for detecting and controlling the amount of water in a washing machine. The method includes: making the pulsator rotate intermittently; when the pulsator suddenly stops rotating, acquiring the contact state between the tub and the sensing element; based on the contact state, acquiring the The eccentricity of the bucket; according to the eccentricity, selectively fill the bucket with water; if the eccentricity of the bucket is serious, it means that the amount of water in the washing machine is not enough to completely soak the clothes in water. The amount of water in the tub can match the total amount of clothes, thereby effectively reducing the wear and tear of the clothes, thereby forming a better protection for the clothes.

Description

Water quantity detection and control method in washing machine and washing machine

technical field

The invention belongs to the technical field of washing machines, and in particular relates to a method for detecting and controlling the amount of water in a washing machine and a washing machine.

Background technique

With the continuous progress of science and technology, people's hands are gradually liberated from heavy manual labor, especially in today's accelerated pace of life, almost every household will use a washing machine to clean clothes instead of traditional manual cleaning. . However, there are still many problems in the existing washing machines. For example, the existing washing machines inject a predetermined amount of water into the tub (ie, the outer tub) according to general standards. It is not always possible to completely soak the clothes in the washing tub (that is, the inner tub); at the same time, when the washing water cannot completely soak the clothes, the clothes that have not been soaked in the water will easily have strong friction with the inner wall of the washing tub. This will cause serious wear and tear to the clothing and affect the user experience.

In recent years, in order to effectively improve the overall performance of the washing machine, technicians have added capacity sensors to the washing machine to detect the amount of water in the washing machine. However, these capacity sensors are easily affected by factors such as clothing material and distribution. As a result, the capacity sensor cannot accurately detect the amount of water in the washing machine. Therefore, when the amount of water in the washing machine cannot make the clothes completely immersed in water; if the washing machine starts to run, the clothes that are not immersed in the water will have strong friction with the inner wall of the washing tub, which will cause the clothes to wear and even be damaged, which will greatly affect the user experience.

Accordingly, there is a need in the art for a new method for detecting and controlling the amount of water in a washing machine to solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the above problems in the prior art, that is, in order to solve the problem that the existing washing machine can only detect the amount of water in the washing machine, but cannot detect whether the amount of water matches the clothes in the washing tub, the present invention provides a washing machine inside the washing machine. A water quantity detection and control method, wherein the washing machine includes a water tub, a washing tub arranged in the water tub, and an inductive element arranged outside the water tub; the water quantity detection and control method comprises the following steps: obtaining the The contact state between the water bucket and the sensing element; based on the contact state, the eccentricity of the water tub is acquired; according to the eccentricity, water is selectively injected into the water tub.

In the preferred technical solution of the above-mentioned method for detecting and controlling the water volume in the washing machine, the washing machine further comprises a pulsator arranged in the washing tub, and the method for detecting and controlling the water volume further comprises: in "acquiring the water tub and the sensing The pulsator is rotated intermittently before or at the same time as the step of "Contact state of components".

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "intermittently rotating the pulsator" specifically includes: rotating the pulsator; when the rotational speed of the pulsator reaches a predetermined rotational speed, making the pulsator rotate. The impeller stops turning.

In a preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the method for detecting and controlling the amount of water further comprises: before the step of "rotating the pulsator", putting clothes into the washing tub.

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "obtaining the contact state between the washing tub and the sensing element" specifically includes: when the tub is in contact with the sensing element, obtaining the contact state of the washing tub and the sensing element. The value of the contact force between the tub and the sensing element.

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "selectively injecting water into the tub according to the eccentricity" specifically includes: comparing the value of the contact force with a threshold; The value of the contact force is compared with the threshold value, and water is selectively injected into the tub.

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "selectively injecting water into the tub according to the comparison result between the contact force value and the threshold value" specifically includes: if the contact force If the value of the force is less than or equal to the threshold value, the tub is not filled with water.

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "selectively injecting water into the tub according to the comparison result between the contact force value and the threshold value" specifically includes: if the contact force If the value of the force is greater than the threshold value, the tub is filled with water.

In the preferred technical solution of the above-mentioned method for detecting and controlling the amount of water in the washing machine, the step of "filling water into the tub" specifically includes: injecting a corresponding amount of water into the tub according to the value of the contact force.

The present invention also provides a washing machine, the washing machine includes a control device, and the control device is configured to execute the method for detecting and controlling the water volume in the washing machine described in any one of the above-mentioned preferred technical solutions.

Those skilled in the art can understand that, in a preferred technical solution of the present invention, the washing machine of the present invention includes a tub, a washing tub disposed in the tub, a pulsator disposed in the washing tub, and a washing tub disposed outside the tub The sensing element, the method for detecting and controlling the water quantity in the washing machine of the present invention includes: making the pulsator rotate intermittently; when the pulsator suddenly stops rotating, acquiring the contact state between the tub and the sensing element; based on the contact state, acquiring the eccentricity of the tub; In case of eccentricity, selectively fill water into the bucket; if the eccentricity of the bucket is serious, it means that the amount of water in the washing machine is not enough to make the clothes completely immersed in water. Matching with the total amount of clothes, thus effectively reducing the wear and tear of clothes, thus forming better protection for clothes.

Description of drawings

FIG. 1 is a flow chart of the specific steps of the method for detecting and controlling the amount of water in a washing machine of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the various steps of the methods of the present invention are described in this application in a specific order, these orders are not limiting, and those skilled in the art can perform different orders without departing from the basic principles of the present invention. Perform the described steps.

First of all, it should be noted that the washing machine in this preferred embodiment includes a water tub and a washing tub arranged in the water tub, and a pulsator is arranged in the washing tub. In addition, this preferred embodiment is described by taking as an example a washing machine in which the washing tub is sheathed in the water tub; specifically, the washing tub contains clothes, and the tub is sheathed in the outside the washing tub, so that the water in the tub can soak the clothes in the washing tub. When the pulsator of the washing machine starts to rotate, the clothes and water in the washing tub will also follow the wave. At the same time, when the pulsator stops suddenly during the rotation, the clothes and water in the washing tub will produce centrifugal motion due to the sudden loss of centripetal force, that is, the clothes and water in the washing tub will There is a tendency to continue moving in the tangential direction of the washing tub. In short, when the pulsator in the washing tub suddenly stops or slows down during the rotation, the water and clothes in the washing tub will tend to continue to move along the tangential direction of the washing tub, resulting in The water and clothes in the washing tub impinge on the wall of the washing tub.

Specifically, when the pulsator in the washing tub suddenly stops or decelerates during the rotation, due to the greater flexibility of the water, when the water hits the washing tub along the tangential direction, the movement direction of the water will immediately At the same time, in the case of sufficient water, the clothes in the water will also change with the change of the movement direction of the water; however, in the case of insufficient water, because the flexibility of the clothes itself is small and the overall weight is large, so , when the clothes that are not soaked in water hit the washing tub along the tangential direction, the moving direction of these clothes is difficult to change, and even sticks to the washing tub, thus causing a strong impact on the washing tub. The impact causes the washing tub to produce eccentric motion, and correspondingly, the water tub sleeved outside the washing tub also produces eccentric motion. In other words, when the pulsator in the washing tub suddenly stops or slows down during the rotation, if the washing tub produces eccentric motion, it means that the clothes in the washing tub are not completely immersed in water, that is, the washing machine The amount of water in the washing tub is insufficient; if the washing tub can continue to run smoothly, it means that the clothes in the washing tub have been completely soaked in water, that is, the amount of water in the washing machine is sufficient.

Based on the problem that the existing washing machine proposed in the background can only detect the amount of water in the washing machine, but cannot detect whether the amount of water matches the clothes in the washing tub, and combined with the above principles, the present invention proposes a washing machine with The water quantity detection and control method; the water quantity detection and control method of the present invention can judge whether the water quantity in the washing machine is sufficient by obtaining the eccentricity of the water tub, and in the case of insufficient water quantity in the water tub, timely report to the The water tub is filled with water, so as to effectively ensure that the amount of water in the washing machine can match the total amount of clothes, thereby effectively reducing the wear and tear of the clothes, thereby forming better protection for the clothes.

Further, the washing machine further includes a sensing element disposed outside the tub, the sensing element can sense the contact state between itself and the tub, and the washing machine can obtain the The eccentricity of the tub, so as to selectively fill the tub with water; preferably, when a contact force is generated between the sensing element and the tub, the sensing element can detect the value of the contact force , In addition, the washing machine can obtain the eccentricity of the tub through the value of the contact force, so as to effectively judge whether the amount of water in the washing machine is sufficient.

Those skilled in the art can understand that, preferably, the sensing element is a control rod of the washing machine, and the control rod is arranged on the casing of the washing machine. When the tub produces an excessively large eccentric movement When , the water tub will hit the control rod, and at the same time, the control rod can obtain the value of the impact force between itself and the water tub. It should be noted that the impact force described here is a type of the above-mentioned contact force. In addition, the sensing element can obviously be other instruments that can measure the contact force, such as a force sensor, etc., as long as the sensing element can accurately It is sufficient to measure the impact force of the tub. At the same time, the present invention does not impose any limitation on the type of the inductive element. Since the change of the inductive element does not deviate from the basic principle of the present invention, it all falls within the protection scope of the present invention.

The method of the present invention will be described in detail below by taking the process of the pulsator washing machine running the water quantity detection and control method of the present invention as an example. Specifically, the pulsator washing machine is provided with a control device, the control device is used to control the washing program of the pulsator washing machine, and the control device can also receive the contact force data transmitted by the sensing element, and then adjust the These data are processed accordingly, and then water is selectively added to the tub according to the processing results. Those skilled in the art can understand that the control device may be a control module of the pulsator washing machine itself, or may be other fixed or mobile control devices provided outside the pulsator washing machine.

First, please refer to FIG. 1 , which is a flow chart of the specific steps of the method for detecting and controlling the water quantity in the washing machine of the present invention. As shown in Figure 1, the water quantity detection and control method specifically includes the following steps:

S101: put the clothes into the washing tub;

S102: Start the washing program of the washing machine to make the pulsator rotate;

S103: when the rotational speed of the pulsator reaches a predetermined rotational speed, stop the pulsator from rotating;

S104: when the bucket is in contact with the sensing element, obtain the value of the contact force;

S105: determine whether the value of the contact force is greater than the threshold; if so, execute step S107; if not, execute step S106;

S106: keep the washing program of the washing machine;

S107: Based on the value of the contact force, determine the amount of water injected into the tub;

S108: inject a certain amount of water into the tub;

S109: Continue the washing procedure of the washing machine.

Further, it is only necessary to judge whether the amount of water in the washing machine matches the total amount of clothes when clothes are placed in the washing tub of the pulsator washing machine; therefore, in step S101, the clothes are first put into the washing tub .

Further, since the water quantity detection and control method of the present invention needs to provide initial rotation conditions for the water and clothes in the washing tub, in step S102, first start the washing program of the washing machine according to the user's needs, and send the instructions to the washing machine. A predetermined amount of water is injected into the water tub, and then the pulsator of the pulsator washing machine starts to rotate, thereby driving the water and clothes in the washing tub to rotate. It can be understood that, although the washing program executed in this preferred embodiment is a washing program selected according to the user's needs, the washing program can obviously also be a preset washing program before the washing program selected by the user is executed. At the same time, the predetermined amount of water described in this preferred embodiment refers to the value of the amount of water to be injected that is obtained by calculating the amount of water in the existing washing machine.

After the pulsator starts to rotate, step S103 is executed, that is, the rotation speed of the pulsator is detected in real time, and when the rotation of the pulsator reaches a predetermined rotation speed, the rotation of the pulsator is suddenly stopped. It can be understood that the greater the rotational speed of the pulsator, the greater the centripetal force required for the water and clothes in the washing tub to maintain the rotational speed; at the same time, when the pulsator suddenly stops rotating, the washing The centrifugal motion created by the water and clothes in the bucket is also more intense. Therefore, technicians can control the eccentricity of the tub by setting a predetermined rotational speed, so as to provide more reliable data for the detection method. In particular, when the clothes in the washing tub are not completely immersed in water, the impact force generated by the clothes on the washing tub is also greater, and at this time, the eccentric motion generated by the tub is also more severe.

It can be understood by those skilled in the art that the technician can not only detect the rotation speed of the pulsator in real time by setting a speedometer in the washing machine, but also obtain the speed of the motor of the washing machine through the control device. The operating parameters are used to obtain the rotational speed of the pulsator. In other words, the present invention does not impose any limitation on the way of detecting the rotational speed of the pulsator, as long as the control device can acquire the rotational speed of the pulsator in real time in this way. At the same time, technicians can also set the predetermined rotational speed according to user requirements and the specific structure of the washing machine. In addition, although this preferred embodiment causes the tub to produce eccentric movement by suddenly stopping the rotation of the pulsator, it is obvious that the skilled person can also make the pulsator suddenly decelerate to make the eccentric movement. The tub produces eccentric motion.

Further, when the pulsator suddenly stops rotating, the water and clothes in the washing tub will inevitably hit the wall of the washing tub, causing the tub to move eccentrically, thereby causing the tub and the tub to move eccentrically. The sensing element makes contact. At this time, step S104 is executed, that is, when the water tub is in contact with the sensing element, the value of the contact force is obtained; so as to obtain the eccentricity of the tub based on the value of the contact force, and then determine Whether the amount of water in the washing machine is sufficient.

After obtaining the value of the contact force, step S105 is executed, that is, it is determined whether the value of the contact force is greater than a threshold value. It can be understood that each value of the contact force corresponds to an eccentricity condition, and the eccentricity condition reflects the degree of matching between the amount of water in the washing machine and the total amount of laundry. Specifically, the smaller the value of the contact force is, the smaller the magnitude of the eccentric motion generated by the tub is, that is, the more the amount of water in the washing machine matches the total amount of laundry, that is, the more the amount of water in the washing machine is. On the contrary, the larger the value of the contact force, the greater the magnitude of the eccentric motion generated by the tub, that is, the more mismatch between the amount of water in the washing machine and the total amount of clothes, that is, the greater the amount of water in the washing machine. The less water. It should be noted that the technical personnel can set the threshold by themselves in combination with various factors such as the specific conditions of the washing machine, user requirements, etc., so as to determine the minimum amount of water required by the washing machine.

Further, in step S105, if the value of the contact force is less than or equal to the threshold, it means that the water volume in the washing machine is greater than or equal to the minimum water volume required by the washing machine; at this time, step S106 is executed, namely The control device only needs to maintain the predetermined washing program of the washing machine to meet the cleaning needs, and at the same time, it can also make full use of the water in the tub, and ensure that the washing tub has the amount of water required for cleaning. On top of that, it can also save water. It should be noted that the predetermined washing program described here is the washing program selected by the user.

Further, in step S105, if the value of the contact force is greater than the threshold, it means that the water volume in the washing machine is less than the minimum water volume required by the washing machine; at this time, step S107 is performed, that is, based on the contact force The value of the force determines the amount of water injected into the tub. It can be understood that, the larger the value of the contact force is, the greater the magnitude of the eccentric movement generated by the tub, that is, the more mismatch between the amount of water in the washing machine and the total amount of laundry, that is, the greater the amount of water in the washing machine. the less water. Therefore, the control device can determine the specific value of the amount of water injected into the tub based on the value of the contact force. Specifically, the larger the value of the contact force, the more water that needs to be injected into the tub. The larger the amount of water, that is, the value of the contact force is proportional to the amount of water to be injected. It can be understood by those skilled in the art that, due to the difference in the specific size and structure of the washing machine, this numerical correspondence is also different. Therefore, the technician can set the numerical correspondence between the two according to the actual test situation. relation.

The water quantity detection and control method of the present invention can determine the water quantity that needs to be injected into the tub by the value of the contact force. In other words, the water quantity detection and control method can be based on the matching between the water quantity in the washing machine and the total amount of clothes The specific water injection amount is determined according to the degree of water injection, so as to save the water consumption to the greatest extent on the basis of effectively ensuring that the water amount in the washing machine matches the total amount of clothes. The water amount detection and control method of the present invention can not only accurately detect whether the water amount in the washing machine matches the total amount of clothes, but also can inject the most matching amount into the tub according to the difference in the total amount of clothes in the washing tub. The amount of water in the washing machine can effectively ensure that the amount of water in the washing machine matches the total amount of laundry.

After determining the amount of water that needs to be injected into the tub, step S108 is performed, that is, the amount of water is injected into the tub, so as to effectively ensure that there is sufficient washing water in the washing tub, thereby effectively reducing the wear and tear of clothes, and then It has a better protection effect on the clothes in the washing tub. Finally, step S109 is executed, that is, the washing machine is controlled to continue to execute the washing program set by the user. It can be understood that steps S108 and S109 can also be performed simultaneously, that is, water is injected into the tub while the washing machine is running the set washing program, so as to effectively shorten the washing time and improve the washing efficiency.

Finally, it should be noted that the above-mentioned embodiments are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. When those skilled in the art actually use the present invention, some steps may be appropriately added or deleted as required, or the order of different steps may be exchanged. Such changes do not go beyond the basic principles of the present invention, and belong to the protection scope of the present invention.

So far, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (8)

1. A water quantity detection control method in a washing machine is characterized in that the washing machine comprises a water bucket, a washing bucket arranged in the water bucket and a sensing element arranged outside the water bucket; the water quantity detection control method comprises the following steps:

acquiring a contact state of the water containing barrel and the induction element;

acquiring the eccentricity condition of the water barrel based on the contact state;

selectively filling water into the tub according to the eccentricity;

the washing machine further comprises a wave wheel arranged in the washing barrel, and the water quantity detection control method further comprises the following steps:

intermittently rotating the pulsator before or simultaneously with the step of 'acquiring a contact state of the tub with the sensing element';

the step of "intermittently rotating the pulsator" specifically includes:

rotating the pulsator;

and when the rotating speed of the impeller reaches a preset rotating speed, stopping the impeller from rotating.

2. The method of claim 1, further comprising:

before the step of "rotating the pulsator", laundry is put into the washing tub.

3. The method of claim 1 or 2, wherein the step of obtaining the contact state of the tub with the sensor comprises:

acquiring a value of a contact force between the tub and the induction element when the tub comes into contact with the induction element.

4. The method of claim 3, wherein the step of selectively filling water into the tub according to the eccentricity comprises:

comparing the value of the contact force to a threshold value;

selectively filling water into the tub according to a comparison result of the value of the contact force with the threshold value.

5. The method of claim 4, wherein the step of selectively filling water into the tub according to the comparison result between the value of the contact force and the threshold value comprises:

if the contact force is less than or equal to the threshold value, the water is not filled into the tub.

6. The method of claim 4, wherein the step of selectively filling water into the tub according to the comparison result between the value of the contact force and the threshold value comprises:

and if the contact force is greater than the threshold value, filling water into the water barrel.

7. The method as claimed in claim 6, wherein the step of filling water into the water tub comprises:

and injecting a corresponding amount of water into the water barrel according to the value of the contact force.

8. A washing machine characterized by comprising a control device for performing the water amount detection control method of any one of claims 1 to 7.

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