CN114606718A

CN114606718A - Barrel assembly and clothes treatment equipment

Info

Publication number: CN114606718A
Application number: CN202210336798.1A
Authority: CN
Inventors: 黄升野; 范建峰; 尤惠钦
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-06-10
Anticipated expiration: 2042-03-31
Also published as: CN114606718B

Abstract

An embodiment of the present invention provides a tub assembly and a laundry treating apparatus, the tub assembly including: the top end of the outer barrel is open; the barrel cover surrounds the top end of the outer barrel; the inner barrel is arranged in the outer barrel, and the top end of the inner barrel is open; the balance ring is arranged at the top end of the inner barrel and comprises an outer ring shell and an inner ring shell located on the radial inner side of the outer ring shell, a first annular cavity channel is defined in the space in the outer ring shell, a second annular cavity channel is defined in the space in the inner ring shell, and the highest point of the inner ring shell is located on the inner side of the radial inner edge of the barrel cover and is not lower than the lower edge of the radial inner edge. The barrel body assembly in the embodiment of the invention reduces the probability of damage caused by the fact that clothes are stirred into the gap between the balance ring and the barrel cover, and plays a role in protecting the clothes.

Description

Barrel assembly and clothes treatment equipment

Technical Field

The invention relates to the technical field of clothes treatment, in particular to a barrel assembly and clothes treatment equipment.

Background

In the course of performing the dehydration process of the washing machine, an eccentric load is easily generated due to unbalanced distribution of laundry in the inner tub of the washing machine. The centrifugal force generated by the eccentric load can drive the vibration of the inner barrel, and further drive the whole washing machine to vibrate together. The vibration not only can generate noise to influence user experience, but also can easily damage parts in the washing machine, and reduce the service life of the washing machine. Therefore, the centrifugal force generated by the eccentric load is balanced by arranging the balance ring, so that the problems of vibration, noise and the like generated when the washing machine operates are reduced.

In the related art, referring to fig. 1 and 2, a balance ring 40 ' is provided on the inner cylinder 30 ' to rotate with the inner cylinder 30 '. In the process of processing the laundry, when the laundry in the inner tub 30 ' is stored more, there is a possibility that small laundry enters between the inner tub 30 ' and the outer tub 10 ' from the gap between the balance ring 40 ' and the tub cover 20 ' to be damaged.

Disclosure of Invention

In view of the above, embodiments of the present application are directed to providing a tub assembly and a laundry processing apparatus capable of reducing a probability of laundry entering between an inner tub and an outer tub.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

the present invention provides a bucket assembly, comprising:

an outer tub having an open top end;

the barrel cover surrounds the top end of the outer barrel;

the inner barrel is arranged in the outer barrel, and the top end of the inner barrel is open;

the balance ring is arranged at the top end of the inner barrel, the balance ring comprises an outer ring shell and an inner ring shell located on the radial inner side of the outer ring shell, a first annular cavity channel is defined in the space in the outer ring shell, a second annular cavity channel is defined in the space in the inner ring shell, and the highest point of the inner ring shell is located on the inner side of the radial inner edge of the barrel cover and not lower than the lower edge of the radial inner edge.

In some embodiments, the first annular channel and the second annular channel are isolated from each other.

In some embodiments, the bottom wall of the second annular channel is higher than the bottom wall of the first annular channel.

In some embodiments, the top wall of the second annular channel is higher than the top wall of the first annular channel.

In some embodiments, the inner ring housing is axially offset from the outer ring housing, a top end of the inner ring housing is higher than a top end of the outer ring housing, and a bottom end of the inner ring housing is higher than a bottom end of the outer ring housing.

In some embodiments, the top end of the inner ring housing is higher than the top end of the outer ring housing, and the top end of the inner ring housing has an annular inclined surface whose inner edge in the radial direction is higher than the outer edge thereof.

In some embodiments, the lower edge of the inner ring shell facing the inner side of the inner cylinder is a circular arc surface; and/or the lower edge of the outer shell facing the inner side of the inner cylinder is a circular arc surface.

In some embodiments, in a top view projection of the barrel assembly, a projection of the outer ring housing does not exceed a projection range of the barrel cover.

In some embodiments, in a top view projection of the barrel assembly, a projection of a radially inner edge of the barrel lid is located at an intersection of the inner ring shell and the outer ring shell.

In some embodiments, the tub cover includes a cover body and a rib, the radially outer end of the cover body is connected to the top end of the outer tub, the rib is disposed at the radially inner edge of the cover body, the rib extends in a vertical direction, and the bottom end of the rib forms a lower edge of the radially inner edge.

In some embodiments, the highest point of the inner ring shell is lower than the upper edge of the radially inner edge.

The invention also provides a clothes treatment device, which is characterized by comprising a power shaft, a wave wheel and the barrel assembly in any one of the embodiments, wherein the wave wheel is positioned in the inner barrel and is in driving connection with the power input shaft so that the power shaft drives the wave wheel to rotate, the power shaft is selectively connected with the inner barrel, and the power shaft drives the inner barrel and the wave wheel to rotate together relative to the outer barrel under the state that the power shaft is connected with the inner barrel.

According to the barrel body assembly in the embodiment of the invention, as the highest point of the inner ring shell is higher than the lower edge of the radial inner edge, clothes cannot directly enter a gap between the balance ring and the barrel cover along the axial direction, the probability of damage caused by the fact that the clothes are stirred into the gap between the balance ring and the barrel cover is reduced, and the clothes are protected.

Drawings

FIG. 1 is a sectional view of a related art tub assembly;

FIG. 2 is an enlarged schematic view of position A of FIG. 1;

FIG. 3 is a cutaway schematic view of a barrel assembly in one embodiment of the present disclosure;

FIG. 4 is an enlarged schematic view of position B of FIG. 3;

FIG. 5 is a cross-sectional view of a balance ring according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a balance ring according to another embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a balance ring according to another embodiment of the present invention.

Description of the reference numerals

An outer tub 10; a tub cover 20; a radially inner edge 20 a; a lid body 21; a flange 22; an inner cylinder 30; a balance ring 40; an inner ring housing 41; a second annular channel 41 a; an annular inclined surface 411; an outer ring housing 42; the first annular channel 42 a; a power shaft 50; an impeller 60; a highest point reference line L1 of the inner ring shell; a radially inner edge lower edge reference line L2; radially inner edge along reference line L3

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, the "up," "down," "top," "bottom," "axial," "radial" orientations or positional relationships are based on the orientations or positional relationships illustrated in FIG. 3, it being understood that these orientation terms are merely used to facilitate the description of the present application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application.

Referring to fig. 3 to 7, the tub assembly according to an embodiment of the present invention includes an outer tub 10, a tub cover 20, an inner tub 30, and a balance ring 40.

The top end of the outer tub 10 is opened. The inner cylinder 30 is disposed in the outer cylinder 10, and the top end of the inner cylinder 30 is open. The inner drum 30 is provided therein with a laundry treating chamber into which laundry can be placed and taken out from an opening of the inner drum 30.

The inner barrel 30 and the outer barrel 10 are coaxially arranged at intervals along the radial direction, and the inner barrel 30 can rotate relative to the outer barrel 10. By the rotation of the inner drum 30, the clothes in the clothes processing chamber are attached to the inner wall of the inner drum 30 under the action of centrifugal force and the moisture in the clothes is separated from the clothes. The inner tub 30 is provided with a plurality of drain holes radially penetrating the inner tub 30, and moisture separated from clothes by centrifugal force can enter the outer tub 10 through the drain holes and then be discharged through a drain port provided in the outer tub 10.

The tub cover 20 surrounds the top end of the outer tub 10. The barrel cover 20 covers the gap between the top end of the outer barrel 10 and the top end of the inner barrel 30 along the radial direction, and the barrel cover 20 can prevent the clothes from directly entering the gap between the inner barrel 30 and the outer barrel 10 in the process of entering the clothes processing cavity through the opening of the inner barrel 30; meanwhile, the tub cover 20 can prevent water from splashing during the washing process of the laundry, protect the balance ring 40 to a certain extent, and reduce the influence of foreign matter impact on the balance ring 40.

The balance ring 40 is disposed at the top end of the inner cylinder 30, and the balance ring 40 includes an outer ring housing 42 and an inner ring housing 41 located radially inside the outer ring housing 42. The space inside the outer ring housing 42 defines a first annular channel 42 a. The space inside the inner ring housing 41 defines a second annular channel 41 a. The first annular channel 42a and the second annular channel 41a are internally sealed with fluid, such as balanced rings of salt water and the like, which rotate along with the inner cylinder 30, and the fluid in the first annular channel 42a and the second annular channel 41a can flow to the opposite side of the mass center of the inner cylinder 30 relative to the rotation axis, so that the eccentric amplitude of the inner cylinder 30 during dehydration is reduced, the noise is reduced, and the probability of barrel collision is reduced.

The liquid flow path in the first annular channel 42a and the second annular channel 41a is not limited.

Taking the first annular channel 42a as an example, in some embodiments, the first annular channel 42a is circumferentially continuous such that the amplitude of the fluid movement in the first annular channel 42a may exceed 360 °. In other embodiments, a plurality of partition plates are disposed in the first annular channel 42a, the partition plates partition the first annular channel 42a to form a plurality of circumferentially arranged independent chambers, each chamber is provided with a fluid, and the fluid flows only in the corresponding chamber.

It is understood that the second annular channel 41a may also be configured in any of the configurations described above for the first annular channel 42 a.

It can be understood that the distances between the balance ring 40 and the outer barrel 10 and between the balance ring 40 and the barrel cover 20 are not less than the preset safety distance, so as to reduce the probability that the balance ring 40 is scratched or collided with the outer barrel 10 and the barrel cover 20 due to the swinging generated in the process that the balance ring 40 rotates along with the inner barrel 30.

Referring to fig. 4, the highest point of the inner ring casing 41 is located inside the radially inner edge 20a of the tub cover 20 and is not lower than the lower edge of the radially inner edge 20 a. That is, the highest point reference line L1 of the inner ring casing 41 is not lower than the lower edge reference line L2 of the radially inner edge 20 a.

In the barrel assembly in the embodiment of the invention, because the highest point of the inner ring shell 41 is higher than the lower edge of the radial inner edge 20a, clothes cannot directly enter the axial gap between the balance ring 40 and the barrel cover 20 along the radial direction, the probability of damage caused by the clothes being stirred into the gap between the balance ring 40 and the barrel cover 20 is reduced, and the clothes are protected.

It is to be understood that the manner of arrangement in the radial direction between the outer ring housing 42 and the inner ring housing 41 is not limited. For example, referring to fig. 4 to 7, the outer ring housing 42 is radially attached to the inner ring housing 41, so that the overall structure of the balance ring 40 in the radial direction is compact, the size of the balance ring 40 in the radial direction is reduced, the occupation of the inner space of the inner barrel 30 by the balance ring 40 is reduced, and the space utilization rate is improved.

It will be appreciated that the particular positional relationship of the highest point of the outer ring housing 42 with respect to the radially inner edge 20a is not limited. For example, referring to fig. 4, in some embodiments, the outer ring housing 42 is located outside the radial inner edge 20a and is not higher than the lower edge of the radial inner edge 20a, so as to increase the axial gap between the outer ring housing 42 and the tub cover 20, and reduce the probability that the outer ring housing 42 collides with the tub cover 20 due to the oscillation generated during the rotation of the inner tub 30. In other embodiments, the highest point of the outer ring shell 42 is located outside the radially inner edge 20a and is not lower than the lower edge of the radially inner edge 20a, i.e. the top side of the balancing ring 40 is formed with a groove, and the lower edge of the radially inner edge 20a extends into the groove, so that the gap between the balancing ring 40 and the tub cover 20 is zigzag, and the possibility of laundry or foreign matters entering the gap between the balancing ring 40 and the tub cover 20 is further reduced.

In some embodiments, referring to fig. 5, the first annular channel 42a and the second annular channel 41a are communicated with each other at a position higher than the bottom wall of the second annular channel 41 a. When the rotational speed of the inner cylinder 30 is low, the fluid in the first annular channel 42a and the second annular channel 41a flows to the opposite side of the eccentric center of mass to suppress the eccentric amplitude; when the rotation speed of the inner cylinder 30 is high, the fluid in the second annular channel 41a flows upward along the radial outer side wall of the second annular channel 41a under the action of centrifugal force until entering the first annular channel 42a through the communication position between the first annular channel 42a and the second annular channel 41a, so that the center of mass of the balance ring 40 moves outward in the radial direction, thereby improving the ability to suppress the eccentric amplitude at high rotation speeds.

It will be appreciated that the level of the communication between the first annular channel 42a and the second annular channel 41a is such that when the inner barrel 30 stops rotating, a portion of the fluid in the first annular channel 42a can flow past the communication and back into the second annular channel 41 a.

In some embodiments, referring to FIG. 6, the first annular channel 42a and the second annular channel 41a are isolated from each other. For the inner cylinders 30 with different volumes, the balance vibration damping of the washing machine can be realized by injecting fluid into the first annular cavity 42a and/or the second annular cavity 41a respectively. That is, the same balance ring 40 is installed for different types of inner cylinders 30, and fluid is injected through different flow passages, so that the eccentric restraining capability of the balance ring 40 is flexibly adjusted, the compatibility of the balance ring 40 is enhanced, and the manufacturing cost is reduced.

It can be understood that the ability of the balance ring 40 to suppress eccentricity is further improved by adjusting the relative dimensional relationship between the first annular channel 42a and the second annular channel 41a to adjust the position of the center of mass of the balance ring 40.

In some embodiments, referring to FIG. 4, the bottom wall of the second annular channel 41a is higher than the bottom wall of the first annular channel 42 a. That is, the center of mass position of the fluid in the second annular channel 41a is made higher than the center of mass position of the fluid in the first annular channel 42a, so that the total height of the center of mass of the fluid in the balance ring 40 is increased, and the ability of the balance ring 40 to suppress eccentricity is improved.

In some embodiments, referring to FIG. 4, the top wall of the second annular channel 41a is higher than the top wall of the first annular channel 42 a. That is, the fluid in the second annular channel 41a is allowed to rise to a higher level than the fluid in the first annular channel 42a by the centrifugal force in the high rotation speed state, so that the total fluid centroid height within the balance ring 40 in this state is raised, and the ability of the balance ring 40 to suppress eccentricity is improved.

In some embodiments, referring to FIG. 7, the bottom wall of the first annular channel 42a and/or the bottom wall of the second annular channel 41a are disposed at an angle, with the radially inward side being higher than the radially outward side. So that more fluid is accumulated on the radially outward side to further improve the ability of the balance ring 40 to dampen eccentricity.

The wall thicknesses of the outer ring case 42 and the inner ring case 41 may be the same or different.

The balance ring 40 may be formed from a plurality of segments that are joined together, each segment being of unitary construction that is injection molded. The parts can be connected by ultrasonic welding.

In some embodiments, referring to fig. 5 and 6, the bottom end of the inner ring housing 41 is flush with the bottom end of the outer ring housing 42. So as to simultaneously injection-mold the bottom end portion of the inner ring housing 41 and the bottom end portion of the outer ring housing 42 at one time, thereby simplifying the injection-molding surface of the required mold, and reducing the production and manufacturing costs.

In some embodiments, referring to fig. 4, the inner ring shell 41 is axially offset from the outer ring shell 42, the top end of the inner ring shell 41 is higher than the top end of the outer ring shell 42, and the bottom end of the inner ring shell 41 is higher than the bottom end of the outer ring shell 42. On one hand, under the condition that the wall thicknesses of the outer ring shell 42 and the inner ring shell 41 are the same, the bottom wall of the second annular cavity channel 41a is higher than the bottom wall of the first annular cavity channel 42a, the top wall of the second annular cavity channel 41a is higher than the top wall of the first annular cavity channel 42a, and the eccentric restraining capability of the balance ring 40 is improved; on the other hand, the occupation of the inner space of the inner barrel 30 by the inner ring shell 41 is reduced, and the space utilization rate is improved.

It can be understood that the inner ring housing 41 is configured to have the center of mass of the balance ring 40 disposed radially outward as much as possible while the distance between the inner ring housing and the tub cover 20 is not less than the preset safety distance, so as to improve the ability of the balance ring 40 to suppress eccentricity.

In some embodiments, referring to fig. 4 to 7, the top end of the inner ring housing 41 is higher than the top end of the outer ring housing 42, and the top end of the inner ring housing 41 has an annular inclined surface 411, and the inner edge of the annular inclined surface 411 in the radial direction is higher than the outer edge thereof. The distance between the annular inclined surface 411 and the barrel cover 20 is the minimum distance between the inner ring housing 41 and the barrel cover 20, and the size of the distance is not smaller than the preset safety distance. Through the avoidance formed by the annular inclined surface 411, the inner ring shell 41 can be arranged outwards in the radial direction as much as possible while the requirement that the distance between the inner ring shell 41 and the barrel cover 20 is not smaller than the preset safety distance is met, and therefore the eccentric restraining capacity of the balance ring 40 is improved.

It should be noted that the preset safety interval needs to be calculated by combining the mass size of the inner cylinder 30, the mass of the fluid, the maximum load that the inner cylinder 30 can bear, and other factors, and the specific calculation method is well-established in the related art and will not be described herein.

It will be appreciated that the surface of the balancing ring 40 on the side facing the inside of the drum 30 may come into contact with the laundry during the laundry treatment, and therefore, it is desirable to reduce the force between the surface and the laundry to reduce the risk of damage to the laundry by the surface.

For example, referring to fig. 4 to 6, the lower edge of the inner ring housing 41 facing the inside of the inner cylinder 30 is a circular arc surface. By adopting the arc surface, the acting force generated by relative sliding between the clothes and the inner ring shell 41 is prevented from being intensively applied to the fibers of the clothes, so that the risk of damage to the clothes caused by the acting force between the clothes and the inner ring shell is reduced.

In some embodiments where the inner ring shell 41 and the outer ring shell 42 are axially offset, referring to fig. 4, the lower edge of the outer shell facing the inside of the inner barrel 30 is a circular arc surface. So as to prevent the acting force generated by the relative sliding between the clothes and the outer ring shell 42 from being intensively applied to the fibers of the clothes, thereby reducing the risk of damage to the clothes caused by the acting force between the clothes and the outer ring shell.

In some embodiments, referring to fig. 4, in a top view projection of the barrel assembly, the projection of the outer ring housing 42 does not exceed the projection of the barrel cover 20. On one hand, the part of the balance ring 40 shielded by the barrel cover 20 can be enlarged, and the protection effect of the barrel cover 20 on the balance ring 40 is improved; on the other hand, the inner ring case 41 and the outer change case are allowed to be arranged as outward as possible, thereby improving the ability of the balance ring 40 to suppress eccentricity.

In some embodiments, referring to fig. 4, in a top view projection of the tub assembly, a projection of a radially inner edge 20a of the tub cover 20 is located at an intersection of the inner ring housing 41 and the outer ring housing 42. On one hand, the outer ring shell 42 can be completely positioned in the axial projection range of the barrel cover 20, so that the shielding part of the barrel cover 20 on the balance ring 40 is increased, and the protection effect of the barrel cover 20 on the balance ring 40 is improved; on the other hand, the distance between the top end part of the inner ring shell 41 and the barrel cover 20 is not less than the preset safety distance while the top end part extends upwards along the axial direction.

In some embodiments, referring to fig. 4, the tub cover 20 includes a cover 21 and a rib 22, a radially outer end of the cover 21 is connected to a top end of the outer tub 10, the rib 22 is disposed at a radially inner side edge of the cover 21, the rib 22 extends in a vertical direction, and a bottom end of the rib 22 forms a lower edge of the radially inner edge 20 a. By arranging the rib 22, the radial projection area of the radial inner edge 20a is increased, so that the probability that clothes or foreign matters are blocked by the barrel cover 20 in the process of entering the gap between the barrel cover 20 and the balance ring 40 is increased, and the probability that the clothes or the foreign matters enter the gap between the barrel cover 20 and the balance ring 40 is reduced.

The connection manner between the cover 21 and the outer tub 10 is not limited. For example, a screw connection, a snap connection, etc. is used.

In some embodiments, referring to FIG. 4, the highest point of the inner ring shell 41 is lower than the upper edge of the radially inner edge 20 a. That is, the highest point reference line L1 of the inner ring casing 41 is lower than the upper edge reference line L3 of the radially inner edge 20 a. On one hand, under the condition that the axial gap between the balance ring 40 and the barrel cover 20 for blocking clothes from entering is met, the barrel body assembly is compact in structure, and the balance ring 40 is prevented from influencing the overall size of the barrel body assembly; on the other hand, the balance ring 40 is prevented from protruding from the upper edge of the barrel cover 20 to cause interference with other parts.

It will be appreciated that an injection port is provided on the balance ring 40 through which fluid is injected into the first and second

annular channels

42a and 41 a. After the fluid injection is completed, the injection port is sealed to prevent the fluid from leaking. The injection port is sealed by, for example, inserting a sealing plunger into the injection port and bonding the sealing plunger to the inner wall of the injection port by ultrasonic welding.

The specific connection manner of the balance ring 40 and the inner cylinder 30 is not limited. For example, a through hole is formed in the inner cylinder 30 to extend in the radial direction, a threaded hole is formed in the balance ring 40 to extend in the radial direction, and a screw is inserted into the threaded hole from the outside to the inside in the radial direction, so that the balance ring 40 is connected to the inner cylinder 30.

In some embodiments, referring to fig. 4, the cover 21 is bent such that the gap between the cover 21 and the inner ring casing 41 and the gap between the cover 21 and the outer ring casing 42 are always not smaller than the predetermined safety distance.

The embodiment of the invention also provides a clothes treatment device, which comprises a power shaft 50, a wave wheel 60 and the barrel assembly in any one of the previous embodiments.

The pulsator 60 is disposed in the inner tub 30 and is drivingly connected to the power input shaft such that the power shaft 50 drives the pulsator 60 to rotate, the power shaft 50 is selectively connected to the inner tub 30, and the power shaft 50 drives the inner tub 30 and the pulsator 60 to rotate together relative to the outer tub 10 in a state where the power shaft 50 is connected to the inner tub 30.

When the clothes processing equipment is in a washing state, the power shaft 50 is disconnected from the inner drum 30, the power shaft 50 only drives the impeller 60 to rotate, and the impeller 60 stirs water in the inner drum 30 to drive clothes to rotate and rub, so that the clothes are cleaned. In the dehydration state of the laundry treating apparatus, the power shaft 50 is connected to the inner drum 30 to drive the pulsator 60 and the inner drum 30 to rotate simultaneously, and the laundry and the moisture are separated by a centrifugal force generated by the rotation, thereby performing a dehydration function.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bowl assembly, comprising:

an outer tub (10), a top end of the outer tub (10) being open;

the barrel cover (20), the said barrel cover (20) surrounds the top end of the said outer barrel (10);

the inner barrel (30), the said inner barrel (30) is set up in the said outer tub (10), the top of the said inner barrel (30) is opened;

the balance ring (40) is arranged at the top end of the inner barrel (30), the balance ring (40) comprises an outer ring shell (42) and an inner ring shell (41) located on the radial inner side of the outer ring shell (42), a first annular cavity channel (42a) is defined in the space in the outer ring shell (42), a second annular cavity channel (41a) is defined in the space in the inner ring shell (41), and the highest point of the inner ring shell (41) is located on the inner side of a radial inner edge (20a) of the barrel cover (20) and is not lower than the lower edge of the radial inner edge (20 a).

2. The tub assembly according to claim 1, characterized in that said first annular channel (42a) and said second annular channel (41a) are isolated from each other.

3. The tub assembly according to claim 2, characterized in that the bottom wall of said second annular channel (41a) is higher than the bottom wall of said first annular channel (42 a).

4. The tub assembly according to claim 2, characterized in that the top wall of said second annular channel (41a) is higher than the top wall of said first annular channel (42 a).

5. The bucket assembly of claim 1, wherein the inner ring shell (41) is axially offset from the outer ring shell (42), a top end of the inner ring shell (41) being higher than a top end of the outer ring shell (42), a bottom end of the inner ring shell (41) being higher than a bottom end of the outer ring shell (42).

6. The tub assembly according to claim 1, wherein a top end of the inner ring casing (41) is higher than a top end of the outer ring casing (42), the top end of the inner ring casing (41) having an annular inclined surface (411), the annular inclined surface (411) having an inner edge in a radial direction higher than an outer edge thereof.

7. The bowl assembly according to claim 1, wherein the lower edge of the inner ring housing (41) facing the inside of the inner cylinder (30) is a circular arc surface; and/or the lower edge of the outer shell facing the inner side of the inner cylinder (30) is a circular arc surface.

8. The bucket assembly of claim 1, wherein the projection of the outer ring housing (42) does not extend beyond the projection of the bucket lid (20) in a top view projection of the bucket assembly.

9. The bucket assembly of claim 1, wherein a projection of a radially inner edge (20a) of the bucket lid (20) is located at an intersection of the inner ring shell (41) and the outer ring shell (42) in a top view projection of the bucket assembly.

10. The tub assembly according to claim 1, wherein the tub cover (20) comprises a cover (21) and a rib (22), a radially outer end of the cover (21) is connected to a top end of the outer tub (10), the rib (22) is disposed at a radially inner side edge of the cover (21), the rib (22) extends in a vertical direction, and a bottom end of the rib (22) forms a lower edge of the radially inner edge (20 a).

11. The bucket assembly of claim 1, wherein a highest point of said inner ring shell (41) is lower than an upper edge of said radially inner edge (20 a).

12. A laundry treatment apparatus, characterized in that it comprises a power shaft (50), a pulsator (60) and the tub assembly of any of claims 1 to 11, the pulsator (60) being located in the inner tub (30) and being in driving connection with the power input shaft, such that the power shaft (50) drives the pulsator (60) to rotate, the power shaft (50) being selectively connectable with the inner tub (30), the power shaft (50) driving the inner tub (30) and the pulsator (60) to rotate together relative to the outer tub (10) in a state in which the power shaft (50) is connected with the inner tub (30).