Roller washing machine and control method thereof

Abstract

The invention discloses a roller washing machine and a control method thereof. The roller washing machine comprises an outer barrel; the inner barrel is rotationally arranged in the outer barrel; the water storage part is arranged on the inner wall of the inner barrel, a water storage cavity is formed in the water storage part, an opening facing the barrel bottom of the outer barrel is formed in the position, at the barrel bottom of the inner barrel, of the water storage cavity, and a height difference exists between the opening and the inner wall, away from the rotation axis of the inner barrel, in the water storage cavity in the direction away from the rotation axis of the inner barrel; the water injector is arranged at the bottom of the outer barrel and used for spraying water to the opening when the water injector is opposite to the opening; the control part is used for determining the eccentricity condition of the washing machine and determining the water injection amount required by the water storage part according to the eccentricity condition. In the dewatering process of the washing machine, the needed water injection amount can be injected into the water storage part according to the eccentricity condition, so that eccentricity correction is achieved, and the purpose of active vibration reduction is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of washing machines, and in particular to a drum washing machine and a control method thereof. Background Art

[0002] During the dehydration process of the washing machine, due to the uneven distribution of clothes, unbalanced eccentricity occurs, which causes vibration and noise of the washing machine. At present, the main strategy to solve the eccentricity problem during the dehydration process of the washing machine is to shake the load and readjust the load distribution until the ideal eccentricity state is achieved, which will result in a long adjustment time and poor user experience. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present application proposes a drum washing machine and a control method thereof, which can inject the required amount of water into the water storage part according to the eccentricity during the dehydration process of the washing machine, thereby correcting the eccentricity and achieving the purpose of active vibration reduction.

[0004] The drum washing machine proposed in this application comprises:

[0005] outer barrel;

[0006] An inner barrel, rotatably disposed in the outer barrel;

[0007] A water storage part is arranged on the inner wall of the inner barrel, a water storage cavity is arranged in the water storage part, and the water storage cavity is provided with an opening facing the bottom of the outer barrel at the bottom of the inner barrel, and in a direction away from the rotation axis of the inner barrel, there is a height difference between the opening and the inner wall of the water storage cavity away from the rotation axis of the inner barrel;

[0008] A water injector, arranged on the bottom of the outer barrel, and used for spraying water toward the opening when the water injector is opposite to the opening;

[0009] The control unit is used to determine the eccentricity of the washing machine and determine the amount of water required to be injected into the water storage unit according to the eccentricity.

[0010] Preferably, the inner wall of the water storage chamber close to the inner barrel rotation axis is an inclined inner wall, and the inclined inner wall gradually inclines in a direction close to the inner barrel rotation axis from one end of the water storage chamber away from the opening to the opening end.

[0011] Preferably, the distance between the inner wall of the water storage chamber close to the inner barrel rotation axis and the inner barrel rotation axis is not less than the distance between the opening and the inner barrel rotation axis.

[0012] Preferably, the water storage portion is a lifting rib.

[0013] Preferably, an acceleration sensor is provided on the outer tub for detecting the vibration acceleration of the outer tub and feeding back the detected acceleration signal to the control unit, so that the control unit determines the eccentricity of the washing machine based on the acceleration signal.

[0014] Preferably, the drum washing machine further comprises a detection device for detecting the position of the water storage portion, wherein the detection device comprises a sensed element arranged at the bottom of the inner tub and a sensor arranged on the outer tub.

[0015] Preferably, the sensed element is a magnet, and the sensor is a Hall sensor.

[0016] Preferably, in the rotation direction of the inner barrel, the sensed element and the water storage portion corresponding to the sensed element have a predetermined angular distance.

[0017] The dehydration control method of a drum washing machine proposed in the present application is applied to the above-mentioned drum washing machine, and the method comprises:

[0018] Determining the eccentricity of the drum washing machine, and determining the amount of water to be injected into each water storage part according to the eccentricity;

[0019] According to the amount of water that needs to be injected into each of the water storage parts, the water injector is controlled to inject water into the water storage parts.

[0020] Preferably, the operation of controlling the water injector to inject water into the water storage part according to the amount of water required to be injected into each of the water storage parts comprises:

[0021] According to the amount of water required to be injected into each of the water storage parts and the single maximum water injection amount of the water injector, the water injector is controlled to inject water into the water storage parts.

[0022] Beneficial technical effects of this application:

[0023] The present application sets a water storage part on the inner wall of the inner barrel, and there is a height difference between the opening of the water storage cavity in the water storage part and the inner wall of the water storage cavity away from the rotation axis of the inner barrel. During the dehydration process of the washing machine, the required amount of water can be injected into the water storage part according to the eccentricity, thereby realizing the correction of the eccentricity and achieving the purpose of active vibration reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the drum washing machine proposed in the present application when the water storage part rotates to the bottom;

[0025] Figure 2 This is a schematic diagram of the installation position of the sensed element proposed in this application;

[0026] Figure 3This is a schematic diagram of the structure of the drum washing machine proposed in this application when the water storage part rotates to the top under the condition of high-speed rotation of the inner drum;

[0027] Figure 4 This is a schematic diagram of the structure of the drum washing machine proposed in this application when the water storage part rotates to the top under the condition of low-speed rotation of the inner drum.

[0028] In the figure: 1-inner barrel, 11-water storage part, 111-opening, 12-sensed element, 2-outer barrel, 21-water injector, 22-sensor, 23-acceleration sensor. DETAILED DESCRIPTION

[0029] The present application will be further explained below in conjunction with specific embodiments.

[0030] First, refer to Figure 1 The present application provides a drum washing machine, comprising: an outer tub 2, an inner tub 1, a water storage portion 11, a water injector 21 and a control portion.

[0031] Among them, the inner barrel 1 is rotatably arranged in the outer barrel 2; the water storage part 11 is arranged on the inner wall of the inner barrel 1, and a water storage cavity is arranged in the water storage part 11. The water storage cavity is provided with an opening 111 facing the bottom of the outer barrel 2 at the bottom of the inner barrel 1. In the direction away from the rotation axis of the inner barrel 1, there is a height difference between the opening 111 and the inner wall of the water storage cavity away from the rotation axis of the inner barrel 1; the water injector 21 is arranged on the bottom of the outer barrel 2, and the water injector 21 is used to spray water to the opening 111 when it is opposite to the opening 111; the control part is used to determine the eccentricity of the washing machine, and determine the required water injection amount of the water storage part 11 (that is, the required water injection amount of the water storage cavity) according to the eccentricity. The calculation of the eccentricity and the water injection amount can be determined by the existing technology.

[0032] It should be noted that in actual products, multiple water storage sections 11 can be set in the inner barrel 1 of the drum washing machine, and different amounts of water can be injected into each water storage section 11 to achieve a balanced load on the inner barrel 1. In the case of multiple water storage sections 11, the method for calculating the required water injection amount for each water storage section can refer to the prior art, and the embodiments of the present application will not be elaborated here.

[0033] The present application sets a water storage part on the inner wall of the inner barrel, and there is a height difference between the opening of the water storage cavity in the water storage part and the inner wall of the water storage cavity away from the rotation axis of the inner barrel. The required amount of water can be injected into the water storage part according to the eccentricity, thereby realizing the correction of the eccentricity and achieving the purpose of active vibration reduction.

[0034] Specifically, refer to Figure 1 and Figure 3When the inner drum 1 is performing a dehydration operation and rotating at a high speed (such as a rotation speed greater than 90 rpm), the water in the water storage chamber is affected by the centrifugal force greater than gravity and adheres to the inner wall of the water storage chamber away from the rotation axis of the inner drum 1. Since there is a height difference between the opening 111 and the inner wall of the water storage chamber away from the rotation axis of the inner drum 1, the area in the water storage chamber that can store water is between the opening 111 and the inner wall of the water storage chamber away from the rotation axis of the inner drum 1. Therefore, the drum washing machine provided in the present application can inject water into the water storage chamber when the inner drum 1 is rotating at a high speed that generates a centrifugal force greater than gravity, adjust the load distribution in the inner drum 1, and ensure the stability of the inner drum and even the entire machine during high-speed rotation.

[0035] When the inner tub 1 rotates at a low speed, such as when the inner tub 1 is finished spinning, the inner tub 1 speed is reduced to 40 rpm, and the centrifugal force generated by the rotation of the inner tub 1 is less than the gravity of the water. Figure 4 When the water storage part 11 rotates to the high position, the opening 111 is just at the bottom of the water storage cavity. The water in the water storage cavity flows out from the opening 111 due to gravity, and enters the bottom of the outer barrel through the gap between the inner barrel 1 and the outer barrel 2, realizing the automatic discharge function of the water in the water storage cavity. The present application only needs to set an opening in the water storage cavity to realize the water entering the water storage cavity or automatically discharging the water storage cavity. Not only is the structure simple, but it can also effectively realize the correction of eccentricity and reduce the vibration noise during the dehydration process of the washing machine.

[0036] In order to facilitate the effective and rapid discharge of water in the water storage chamber from the opening 11 during drainage, the inner wall of the water storage chamber close to the rotation axis of the inner barrel 1 may be an inclined inner wall, which gradually inclines from one end of the water storage portion 11 away from the opening 111 to the opening end in a direction close to the rotation axis of the inner barrel 1. The inclined inner wall may be integrally formed with the water storage portion, or may be a guide plate with an inclined surface provided in the water storage chamber.

[0037] On the other hand, in order to prevent the opening 111 from blocking the outflow of water during drainage, it can be arranged as follows: the distance between the inner wall of the water storage chamber close to the rotation axis of the inner barrel 1 and the rotation axis of the inner barrel 1 is not less than the distance between the opening and the rotation axis of the inner barrel.

[0038] In this embodiment, the water storage portion 11 can be a component specially designed in the inner drum 1 for adjusting the load distribution; it can also be the lifting ribs of the inner drum of the current drum washing machine. The existing lifting ribs have sufficient space inside as a water storage chamber, which makes full use of the structure of the existing drum washing machine, with small overall changes and low production costs.

[0039] In order to detect the eccentricity of the drum washing machine, an acceleration sensor 23 may be provided in the drum washing machine, which is provided on the outer tub 2 and is used to detect the vibration acceleration of the outer tub 2 and feed back the detected acceleration signal to the control unit, so that the control unit determines the eccentricity of the washing machine based on the acceleration signal. In this embodiment, the method for determining the eccentricity of the washing machine by vibration acceleration can adopt the existing technology.

[0040] In this embodiment, the drum washing machine may further include a detection device for detecting the position of the water storage part 11, and the detection device includes a sensed element 12 arranged at the bottom of the inner tub 1 and a sensor 22 arranged on the outer tub 2. When the control unit determines the amount of water required to be injected into the water storage part, the sensed element is detected by the sensor 22 to determine the position of the water storage part. When the water storage part is in the water injection position, the water injector can be controlled to inject water into the water storage part.

[0041] In this embodiment, the sensed element 12 may be a magnet, and the sensor 22 may be a Hall sensor. The magnet is sensed by the Hall sensor, and a magnet is provided at one end of each water storage part close to the Hall sensor, so that the Hall sensor can sense the magnet of the water storage part.

[0042] In this embodiment, refer to Figure 2 , in the rotation direction of the inner tub 1, the sensed element 12 and the water storage portion 11 corresponding to the sensed element 12 have a predetermined angular distance. Since the inner tub rotates at a high speed during the dehydration process, a preset time is required from the time when the sensor detects the sensed element to the time when the water injector sprays water, and therefore, the sensed element and the water storage portion corresponding to the sensed element have a predetermined angular distance, when the inner tub rotates, the sensed element is detected by the sensor, and when the sensed element rotates by the predetermined angular distance, the water injector and the opening are exactly opposite, and the rotation time is exactly the same as the preset time required from the time when the sensor detects the sensed element to the time when the water injector sprays water, so that the water injector can just inject water into the water storage portion, thereby improving the accuracy of water injection.

[0043] In a second aspect, the present application further provides a drum washing machine dehydration control method, which is applied to the above-mentioned drum washing machine, and the method comprises:

[0044] Determine the eccentricity of the drum washing machine, and determine the amount of water to be injected into each water storage part according to the eccentricity;

[0045] According to the amount of water required to be injected into each water storage part, the water injector is controlled to inject water into the water storage part.

[0046] As mentioned above, the steps of determining the eccentricity of the drum washing machine and determining the amount of water to be injected into each water storage part according to the eccentricity can be implemented using existing technologies, and the embodiments of the present application will not be repeated here.

[0047] The specific implementation method of the water injector 21 injecting water into the water storage chamber in the water storage part 11 may be to control the water injector 21 to spray water into the opening 111 when the opening 111 of the water storage part 11 is opposite to the water injector 21 during the rotation of the inner barrel.

[0048] However, considering that the single water injection volume of the water injector is limited, the water storage section can be injected with water multiple times. Therefore, in the present application, the operation of controlling the water injector to inject water into the water storage section according to the amount of water that needs to be injected into each water storage section may include: controlling the water injector to inject water into the water storage section according to the amount of water that needs to be injected into each water storage section and the single maximum water injection volume of the water injector, and when the amount of water that needs to be injected into the water storage section is greater than the single maximum water injection volume of the water injector, water needs to be injected in batches.

[0049] When water injection is required, the following methods can be used: each time water is injected according to the maximum single injection amount of the water injector, until the remaining water injection amount for washing clothes is not greater than the maximum single injection amount of the water injector, and then the remaining water injection amount is injected at one time; or water is injected in equal parts, and the water injection amount each time is not greater than the maximum single injection amount of the water injector; or water is injected in a decreasing manner. The specific method of water injection in batches can be pre-set in the control unit according to actual conditions.

[0050] In addition, in order to ensure load balance and prevent the load from not being effectively adjusted after the drum washing machine dehydration control method of the present application is executed once, the drum washing machine dehydration control method of the present application can be executed multiple times until the load distribution is detected to reach a preset ideal eccentric state.

[0051] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents, and all shall be included in the scope of protection of the present application.

Claims

1. A drum washing machine, characterized in that: include: Outer barrel (2); An inner barrel (1) is rotatably disposed in the outer barrel (2); A water storage portion (11) is arranged on the inner wall of the inner barrel (1), a water storage cavity is arranged in the water storage portion (11), an opening (111) facing the bottom of the outer barrel (2) is arranged at the bottom of the inner barrel (1), and in a direction away from the rotation axis of the inner barrel (1), there is a height difference between the opening (111) and the inner wall of the water storage cavity away from the rotation axis of the inner barrel (1); A water injector (21) is arranged on the bottom of the outer barrel (2), and the water injector (21) is used to spray water toward the opening (111) when facing the opening (111); The control unit is used to determine the eccentricity of the washing machine and determine the amount of water required to be injected into the water storage unit (11) according to the eccentricity.

2. The drum washing machine according to claim 1, characterized in that: The inner wall of the water storage chamber close to the rotation axis of the inner barrel (1) is an inclined inner wall, and the inclined inner wall gradually inclines in a direction close to the rotation axis of the inner barrel (1) from one end of the water storage chamber away from the opening (111) to the opening end.

3. The drum washing machine according to claim 1, characterized in that: The distance between the inner wall of the water storage chamber close to the rotation axis of the inner barrel (1) and the rotation axis of the inner barrel (1) is not less than the distance between the opening and the rotation axis of the inner barrel.

4. The drum washing machine according to claim 1, characterized in that: The water storage portion (11) is a lifting rib.

5. The drum washing machine according to claim 1, characterized in that: Also includes: An acceleration sensor (23) is arranged on the outer tub (2) and is used to detect the vibration acceleration of the outer tub (2) and feed back the detected acceleration signal to the control unit so that the control unit determines the eccentricity of the washing machine based on the acceleration signal.

6. The drum washing machine according to any one of claims 1 to 5, characterized in that: The drum washing machine also includes a detection device for detecting the position of the water storage portion (11), wherein the detection device includes a sensing element (12) arranged at the bottom of the inner barrel (1) and a sensor (22) arranged on the outer barrel (2).

7. The drum washing machine according to claim 6, characterized in that: The sensed element (12) is a magnet, and the sensor (22) is a Hall sensor.

8. The drum washing machine according to claim 6, characterized in that: In the rotation direction of the inner barrel (1), the sensed element (12) and the water storage portion (11) corresponding to the sensed element (12) have a predetermined angular distance.

9. A method for controlling the dehydration of a drum washing machine, characterized in that: Applicable to the drum washing machine according to any one of claims 1 to 8, the method comprising: Determining the eccentricity of the drum washing machine, and determining the amount of water to be injected into each water storage part according to the eccentricity; According to the amount of water that needs to be injected into each of the water storage parts, the water injector is controlled to inject water into the water storage parts.

10. A method for controlling dehydration of a drum washing machine according to claim 9, characterized in that: The operation of controlling the water injector to inject water into the water storage part according to the amount of water required to be injected into each water storage part comprises: According to the amount of water required to be injected into each of the water storage parts and the single maximum water injection amount of the water injector, the water injector is controlled to inject water into the water storage parts.

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