Inner drum assembly and washing machine having the same

Abstract

The present application relates to an inner drum assembly and a washing machine having the same, belonging to the technical field of washing machines, the inner drum assembly comprising: the inner drum defines a hollow cavity with one end open; lifting ribs are arranged on the inner wall of the inner drum, the lifting ribs include a first ridge, a second ridge, a first bottom edge portion and a second bottom edge portion connected to the inner wall of the inner drum, the lifting ribs also include a first end and a second end opposite to each other along the length direction, the first ridge is connected to the first bottom edge portion through a first curved side wall, the second ridge is connected to the second bottom edge portion through a second curved side wall, the first ridge is connected to the second ridge through a curved top wall, in the direction from the first end to the second end, the height of the first ridge gradually decreases, and the height of the second ridge gradually increases. According to the inner drum assembly of the present invention, when clothes contact the lifting ribs, one side has a lifting effect, and the other side has a shaking effect, so that the clothes are lifted and turned over and shaken, reducing the entanglement of the clothes.

Description

Technical Field

[0001] The present application relates to the technical field of washing machines, and in particular to an inner drum assembly and a washing machine having the same. Background Art

[0002] A washing machine is a cleaning appliance that uses mechanical energy generated by electricity to wash clothes. Washing machines are generally divided into drum washing machines and pulsator washing machines according to the washing principle. The washing principle of a drum washing machine is designed to imitate the principle of a mallet hitting clothes. A drum washing machine generally includes an inner drum. The inner drum rotates regularly in positive and reverse directions under the drive of a motor to drive the water flow and the tumbling of clothes. The clothes rise under the drive of the lifting ribs, and then fall freely in the detergent under the action of their own gravity and circulate repeatedly. The clothes are constantly lifted and dropped in the inner drum. Through repeated lifting and dropping actions, coupled with the combined action of washing powder and water, the clothes are washed clean. The drum washing machine uses the lifting ribs to continuously lift and beat the clothes to achieve the purpose of washing clothes.

[0003] The lifting height of the clothes by the lifting ribs determines the strength of the clothes being beaten, which has a significant impact on the washing quality of the clothes. The stirring of the lifting ribs also has a great impact on the entanglement effect of the clothes. The lifting ribs of existing drum washing machines are mostly symmetrical or simple curved surface structures, which are not very effective in lifting clothes and reducing entanglement. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an inner drum assembly, which can better lift and flip the clothes to loosen them, reduce the entanglement of the clothes, and prevent the clothes from being unable to be washed due to entanglement.

[0005] According to the inner cylinder assembly of the present invention, it includes: an inner cylinder, which defines a hollow cavity with an opening at one end; lifting ribs, which are arranged on the inner wall of the inner cylinder, and the lifting ribs include a first ridge, a second ridge, a first bottom edge portion and a second bottom edge portion connected to the inner wall of the inner cylinder, and the lifting ribs also include a first end and a second end opposite to each other along the length direction, the first ridge is connected to the first bottom edge portion through a first curved side wall, the second ridge is connected to the second bottom edge portion through a second curved side wall, and the first ridge is connected to the second ridge through a curved top wall, and in the direction from the first end toward the second end, the height of the first ridge gradually decreases, and the height of the second ridge gradually increases.

[0006] According to the inner drum assembly of the present invention, the height of the first ridge gradually decreases and the height of the second ridge gradually increases in the direction from the first end toward the second end, so that when the clothes come into contact with the lifting ribs, one side has a lifting effect and the other side has a shaking effect, thereby cooperating to lift and flip the clothes and shake them loose, thereby reducing the entanglement of the clothes.

[0007] According to the inner cylinder assembly of the present invention, when the lifting rib is horizontally placed on a horizontal plane with the first bottom edge portion and the second bottom edge portion as the bottom, the orthographic projection of the first ridge and the orthographic projection of the second ridge are both curves, and in the direction from the first end toward the second end, the distance between the orthographic projection of the first ridge and the orthographic projection of the second ridge shows a trend of gradually increasing and then gradually decreasing, then gradually increasing and then gradually decreasing.

[0008] Optionally, in the direction from the first end toward the second end, the width of the curved top wall remains consistent.

[0009] Optionally, when projected in a horizontal plane, the orthographic projection of the curved top wall is a centrally symmetrical figure.

[0010] Optionally, when projected in a horizontal plane, the first bottom edge portion and the second bottom edge portion are respectively located on both sides of the projection of the curved top wall, and the distance between the first bottom edge portion and the second bottom edge portion remains consistent in the direction from the first end toward the second end, and the center of symmetry of the orthographic projection of the curved top wall is equal to the distance between the first bottom edge portion and the second bottom edge portion.

[0011] Optionally, the first bottom edge portion and the second bottom edge portion define a bottom surface, and in the direction from the first end toward the second end, the first curved side wall includes a first peak section and a first peak valley section connected in sequence, and the second curved side wall includes a second peak valley section and a second peak section connected in sequence, the angle between the first peak section and the bottom surface is greater than the angle between the first peak valley section and the bottom surface, the angle between the second peak section and the bottom surface is greater than the angle between the second peak valley section and the bottom surface, the first peak section and the second peak valley section are arranged opposite to each other, and the first peak valley section and the second peak section are arranged opposite to each other.

[0012] Optionally, the angles between the first peak segment and the second peak segment and the bottom surface are in the range of 75° to 90°, and / or the angles between the first peak-valley segment and the second peak-valley segment and the bottom surface are in the range of 10° to 20°.

[0013] Optionally, the heights between the first peak segment and the second peak segment and the bottom surface are 20 mm to 40 mm, and / or the heights between the first peak-valley segment and the second peak-valley segment and the bottom surface are 10 mm to 30 mm.

[0014] According to the inner cylinder assembly of the present invention, the distance between the first bottom edge portion and the second bottom edge portion ranges from 70 mm to 80 mm.

[0015] According to the inner cylinder assembly of the present invention, the lifting ribs extend along the axial direction of the inner cylinder, and / or a plurality of first through holes are provided on the first curved side wall and the second curved side wall, a plurality of second through holes are provided on the curved top wall, and the diameter of the first through hole is smaller than the diameter of the second through hole.

[0016] The washing machine according to the present invention comprises the inner drum assembly mentioned above.

[0017] According to the washing machine of the present invention, the height of the first ridge gradually decreases and the height of the second ridge gradually increases in the direction from the first end to the second end, so that when the clothes come into contact with the lifting ribs, one side has a lifting effect and the other side has a shaking effect, thereby cooperating to lift, flip and shake the clothes, thereby reducing the entanglement of the clothes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A top view of a lifting rib of an inner cylinder assembly according to an embodiment of the present invention;

[0021] Figure 2 A three-dimensional view of a lifting rib of an inner cylinder assembly according to an embodiment of the present invention at one angle;

[0022] Figure 3 A three-dimensional view of the lifting rib of the inner cylinder assembly according to an embodiment of the present invention from another angle;

[0023] Figure 4 A front view of a lifting rib of an inner cylinder assembly according to an embodiment of the present invention;

[0024] Figure 5 FIG. 4 is a side view of a lifting rib of an inner cylinder assembly according to an embodiment of the present invention. Description of the drawings:

[0026] Inner tube 10, lifting rib 20, first ridge 21, second ridge 22, first bottom edge portion 23, second bottom edge portion 24, first curved side wall 27, first through hole 272, first peak section 274, second curved side wall 28, second peak section 282, second peak valley section 284, curved top wall 29, second through hole 292, bottom surface A. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] The inner drum assembly for a washing machine according to an embodiment of the present invention will be described below with reference to the accompanying drawings. It can be understood that the inner drum assembly can be applied not only to drum washing machines, but also to dryers and fully automatic pulsator washing machines, etc.

[0029] like Figure 1-Figure 3 As shown, the inner cylinder assembly according to the embodiment of the present invention includes an inner cylinder 10 and lifting ribs 20.

[0030] Specifically, the inner tube 10 defines a hollow cavity with one end open; the lifting rib 20 is arranged on the inner wall of the inner tube 10, and the lifting rib 20 includes a first ridge 21, a second ridge 22, a first bottom edge 23 and a second bottom edge 24 connected to the inner wall of the inner tube 10, and the lifting rib 20 also includes a first end and a second end opposite to each other along the length direction, the first ridge 21 is connected to the first bottom edge 23 through a first curved side wall 27, the second ridge 22 is connected to the second bottom edge 24 through a second curved side wall 28, and the first ridge 21 is connected to the second ridge 22 through a curved top wall 29. In the direction from the first end toward the second end, the height of the first ridge 21 gradually decreases, and the height of the second ridge 22 gradually increases.

[0031] To expand, in the horizontal plane projection, the first bottom edge portion 23 and the second bottom edge portion 24 are respectively located on both sides of the projection of the curved top wall 29. In the cross section perpendicular to the length direction of the lifting rib 20, the first ridge 21 and the second ridge 22 are always higher than the first bottom edge portion 23 and the second bottom edge portion 24. The clothes stick to the barrel because the load loses water and shrinks, the loads squeeze each other, and the loads form a relatively stable arch structure that sticks to the wall of the inner barrel 10. At this time, the lifting rib 20 is the fulcrum of the arch structure. In the direction from the first end to the second end, the height of the first ridge 21 gradually increases. The height of the second ridge 22 gradually increases as the clothes are lowered. The areas where the clothes contact the first ridge 21 and the second ridge 22 of the lifting rib 20 are always in different heights. Especially when the inner drum 10 rotates, the centrifugal forces on different areas of the clothes vary greatly, and the centrifugal forces on both sides have different changing trends. One side is always larger, while the opposite side is smaller. When one side is smaller, the opposite side is larger, which is not easy to balance. The movement trends on the first curved side wall 27 and the second curved side wall 28 are opposite, which makes it easier to twist and roll over, thereby making it easier to shake the clothes loose and prevent accumulation. In addition, the curved top wall 29 is provided to prevent the wear of the clothes while making the clothes easier to flip and shake loose, and to better protect the clothes.

[0032] Before washing, clothes are more likely to be turned over in the length direction of the lifting ribs 20, so that clothes are more likely to be fully moistened before washing, and washing powder or washing liquid can better contact clothes. When washing, clothes are more likely to be turned over in the length direction of the lifting ribs 20, so that clothes are more likely to be turned over, which increases the strength of the clothes and water, and improves the washing ability of the washing machine. When drying, clothes are more likely to be turned over in the length direction of the lifting ribs 20, so that clothes are heated evenly and are easier to be dried. When taking care of clothes, clothes are more likely to be turned over in the length direction of the lifting ribs 20 to prevent clothes from being entangled, and shaking clothes loose will result in fewer wrinkles on clothes, thereby improving the user experience.

[0033] It should be noted that, the first end and the second end may be such that the first end is close to the opening and the second end is far from the opening, or the first end is far from the opening and the second end is close to the opening.

[0034] Among them, the lifting rib 20 is usually a hollow structure, which can reduce the weight of the lifting rib 20, and the lifting rib 20 is usually an integrally formed structure with the inner tube 10, which can improve the structural strength of the connection between the lifting rib 20 and the inner tube 10 and extend the service life of the inner tube 10.

[0035] Of course, one or more lifting ribs 20 can be provided on the inner wall of the inner cylinder 10, and can be provided as needed, and the present application does not limit it. When multiple lifting ribs 20 are provided on the inner wall of the inner cylinder 10, the multiple lifting ribs 20 can be evenly distributed along the circumference of the inner cylinder 10, so that when the inner cylinder 10 rotates,

[0036] like Figure 1-Figure 3 As shown, according to the inner drum assembly of an embodiment of the present invention, the height of the first ridge 21 gradually decreases and the height of the second ridge 22 gradually increases in the direction from the first end to the second end, so that when the clothes come into contact with the lifting ribs 20, one side has a lifting effect and the other side has a shaking effect, thereby cooperating to lift and flip the clothes and shake them loose, thereby reducing the entanglement of the clothes.

[0037] like Figure 1 As shown, according to the inner drum assembly of the embodiment of the present invention, when the lifting rib 20 is placed horizontally on a horizontal plane with the first bottom edge 23 and the second bottom edge 24 as the bottom, the orthographic projection of the first ridge 21 and the orthographic projection of the second ridge 22 are both curves, and in the direction from the first end to the second end, the distance between the orthographic projection of the first ridge 21 and the orthographic projection of the second ridge 22 shows a trend of gradually increasing and then gradually decreasing, then gradually increasing and then gradually decreasing. That is to say, the curved top wall 29 is turned over in the direction from the first end to the second end, and the height and inclination between the first curved side wall 27 and the second curved side wall 28 and the bottom surface A respectively change greatly, so that when the clothes are attached to the curved top wall 29, it is easy to move from a high place to a low place, and the area of ​​the clothes contacting the first curved side wall 27 and the area of ​​the clothes contacting the second curved side wall 28 have opposite movement trends, and the lifting rib 20 is unstable in supporting the clothes, which can drive the clothes to turn over, so as to better shake the entangled clothes.

[0038] In addition, the orthographic projection of the first ridge 21 and the orthographic projection of the second ridge 22 are both curves, which can prevent the lifting ribs 20 from wearing the clothes and avoid scratching or damaging the clothes.

[0039] like Figure 1 As shown, in the direction from the first end toward the second end, the distance between the orthographic projection of the first ridge 21 and the first bottom edge 23 gradually decreases and then gradually increases, and the distance between the second ridge 22 and the second bottom edge 24 gradually decreases and then gradually increases.

[0040] In some embodiments, the width of the curved top wall 29 remains consistent in the direction from the first end toward the second end, which can simplify the structural design and facilitate processing. By simply twisting the curved top wall 29 according to a certain rule, it is possible to achieve that the angle change rules between the first curved side wall 27 and the second curved side wall 28 and the bottom surface A in the length direction are opposite, and the height change rules between the first side side wall and the second curved side wall 28 and the bottom surface A are opposite.

[0041] When the clothes are stirred by the washing machine, the curved top wall 29 can also exert friction on the clothes, thereby adapting to water flows of different speeds, so that the contact area between the clothes and the lifting ribs 20 is larger, making it easier to flip over and increase the impact force with the water flow, thereby improving the cleaning degree of the washing machine.

[0042] In some embodiments, Figure 1 As shown, when projected in a horizontal plane, the orthographic projection of the curved top wall 29 is a centrally symmetrical figure, so that the washing machine can flip and shake the clothes regardless of whether it rotates clockwise or counterclockwise, and the flipping and shaking effect is good.

[0043] In some embodiments, Figure 1 As shown, in the direction from the first end toward the second end, the distance between the first bottom edge portion 23 and the second bottom edge portion 24 remains consistent, and the symmetry center of the positive projection of the curved top wall 29 is equal to the distance between the first bottom edge portion 23 and the second bottom edge portion 24.

[0044] like Figure 4 and Figure 5 As shown, the first bottom edge portion 23 and the second bottom edge portion 24 define a bottom surface A, and in the direction from the first end to the second end, the first curved side wall 27 includes a first peak section 274 and a first peak valley section connected in sequence, and the second curved side wall 28 includes a second peak valley section 284 and a second peak section 282 connected in sequence, the angle between the first peak section 274 and the bottom surface A is greater than the angle between the first peak valley section and the bottom surface A, the angle between the second peak section 282 and the bottom surface A is greater than the angle between the second peak valley section 284 and the bottom surface A, the first peak section 274 and the second peak valley section 284 are arranged opposite to each other, and the first peak valley section and the second peak section 282 are arranged opposite to each other.

[0045] It should be noted that the first bottom edge portion 23 and the second bottom edge portion 24 define a bottom surface A, which means that the first bottom edge portion 23 and the second bottom edge portion 24 are located in the same plane, and the area is located between the first bottom edge portion 23 and the second bottom edge portion 24. The bottom surface A is introduced to explain the inclination direction of the first curved side wall 27 and the second curved side wall 28 and the inclination angle of the first curved side wall 27 and the second curved side wall 28.

[0046] Before washing, the first peak section 274 can lift the clothes, the first peak valley section can stir the water, the second peak section 282 can lift the clothes, the second peak valley section 284 can stir the water, the first peak section 274 and the second peak valley section 284 are arranged opposite to each other, and the first peak valley section and the second peak section 282 are arranged opposite to each other. The area where the clothes contact the first curved side wall 27 is easier to slide from the first peak section 274 to the first peak valley section, and the area where the clothes contact the second curved side wall 28 is easier to slide from the second peak section 282 to the second peak valley section 284, so that the movement trends of the two areas where the clothes contact the lifting rib 20 are opposite, which can make the clothes easier to flip over in the length direction of the lifting rib 20, so that the clothes are easier to be fully moistened before washing, and the washing powder or washing liquid can better contact with the clothes.

[0047] At the beginning of washing, since the height of the first ridge 21 of the lifting rib 20 gradually decreases and the height of the second ridge 22 gradually increases, the area where the clothes contact the first ridge 21 and the second ridge 22 of the lifting rib 20 is always in a state of different heights, which makes it more likely to twist and roll over, thereby making it easier to shake the clothes apart and prevent them from piling up.

[0048] like Figure 4 and Figure 5 As shown, in some embodiments, the angle α between the first peak section 274 and the second peak section 282 and the bottom surface A is in the range of 75° to 90°. If the angle α is too large, the friction and lifting effect of the first peak section 274 and the second peak section 282 on the clothes will be weakened. If the angle α is too small, the flipping effect of the lifting rib 20 will be weakened. Therefore, a suitable angle α needs to be set. The angle α can be 75°, 77°, 79°, 81°, 83°, 85°, 87°, 89°, 90°, etc.

[0049] like Figure 4 and Figure 5 As shown, in some embodiments, the angle β between the first peak-valley section and the second peak-valley section 284 and the bottom surface A is in the range of 10° to 20°. If the angle β is too large, the difference with the angle α will be reduced, and the turning effect of the lifting rib 20 will be weakened. If the angle β is too small, the friction effect of the first peak-valley section and the second peak-valley section 284 on the clothes will be weakened. Therefore, it is necessary to set a suitable angle β.

[0050] The angle β is 10°, 12°, 14°, 16°, 18°, 20°, etc.

[0051] like Figure 4 and Figure 5 As shown, in some embodiments, the height H1 between the first peak section 274 and the second peak section 282 and the bottom surface A is 20 mm to 40 mm.

[0052] Among them, H1 can be 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm and 40mm, etc.

[0053] like Figure 4 and Figure 5 As shown, in some embodiments, the height H2 between the first peak-to-valley section and the second peak-to-valley section 284 and the bottom surface A is 10 mm to 30 mm.

[0054] Among them, H2 can be 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm and 30mm, etc.

[0055] like Figure 4 As shown, according to the inner drum assembly of the embodiment of the present invention, the distance L between the first bottom edge portion 23 and the second bottom edge portion 24 ranges from 70 mm to 80 mm. The larger the value of L, the worse the effect of turning and shaking clothes, and the smaller the value of L, the easier it is to wear clothes. Therefore, it is necessary to set a suitable range of L. Among them, L can be 70 mm, 72 mm, 74 mm, 76 mm, 78 mm and 80 mm.

[0056] According to the inner drum assembly of the embodiment of the present invention, the lifting ribs 20 extend along the axial direction of the inner drum 10, so that the washing machine can flip and shake the clothes regardless of whether it rotates clockwise or counterclockwise, and the flipping and shaking effect is better.

[0057] According to the inner drum assembly of the embodiment of the present invention, a plurality of first through holes 272 are provided on the first curved side wall 27 and the second curved side wall 28, and a plurality of second through holes 292 are provided on the curved top wall 29, and the diameter of the first through hole 272 is smaller than the diameter of the second through hole 292. The diameter of the second through hole 292 is relatively large, and during washing, a large amount of water passes through the second through hole 292, and when the inner drum 10 rotates, the clothes are flushed, and the flushing water flows down along the first curved side wall 27 or the second curved side wall 28. The diameter of the first through hole 272 is relatively small, so that the amount of water passing through is relatively small, and the clothes are washed point-to-point when the inner drum 10 rotates. The two water flows act on the clothes in combination, so that the washing effect is better.

[0058] A washing machine according to an embodiment of the present invention includes the inner drum assembly described above.

[0059] According to the washing machine of the embodiment of the present invention, the height of the first ridge 21 gradually decreases and the height of the second ridge 22 gradually increases in the direction from the first end to the second end, so that when the clothes come into contact with the lifting ribs 20, one side has a lifting effect and the other side has a shaking effect, thereby cooperating to lift, flip and shake out the clothes, thereby reducing the entanglement of the clothes.

[0060] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. An inner cylinder assembly, characterized in that: include: An inner cylinder, wherein the inner cylinder defines a hollow cavity with an open end; Lifting ribs, the lifting ribs are arranged on the inner wall of the inner tube, the lifting ribs include a first ridge, a second ridge, a first bottom edge portion and a second bottom edge portion connected to the inner wall of the inner tube, the lifting ribs also include a first end and a second end opposite to each other along the length direction, the first ridge is connected to the first bottom edge portion through a first curved side wall, the second ridge is connected to the second bottom edge portion through a second curved side wall, the first ridge is connected to the second ridge through a curved top wall, in the direction from the first end toward the second end, the height of the first ridge gradually decreases, and the height of the second ridge gradually increases.

2. The inner cylinder assembly according to claim 1, characterized in that: When the lifting rib is placed horizontally on a horizontal plane with the first bottom edge and the second bottom edge as the bottom, the orthographic projection of the first ridge and the orthographic projection of the second ridge are both curves, and in the direction from the first end toward the second end, the distance between the orthographic projection of the first ridge and the orthographic projection of the second ridge shows a trend of gradually increasing, then gradually decreasing, then gradually increasing, and then gradually decreasing.

3. The inner cylinder assembly according to claim 2, characterized in that: In the direction from the first end toward the second end, the width of the curved top wall remains consistent.

4. The inner cylinder assembly according to claim 3, characterized in that: When projected in a horizontal plane, the orthographic projection of the curved top wall is a centrally symmetrical figure.

5. The inner cylinder assembly according to claim 4, characterized in that: When projected in a horizontal plane, the first bottom edge portion and the second bottom edge portion are respectively located on both sides of the projection of the curved top wall, and in the direction from the first end toward the second end, the distance between the first bottom edge portion and the second bottom edge portion remains consistent, and the center of symmetry of the orthographic projection of the curved top wall is respectively equal to the distance between the first bottom edge portion and the second bottom edge portion.

6. The inner cylinder assembly according to claim 2, characterized in that: The first bottom edge portion and the second bottom edge portion define a bottom surface, and in the direction from the first end to the second end, the first curved side wall includes a first peak section and a first peak valley section connected in sequence, and the second curved side wall includes a second peak valley section and a second peak section connected in sequence, the angle between the first peak section and the bottom surface is greater than the angle between the first peak valley section and the bottom surface, the angle between the second peak section and the bottom surface is greater than the angle between the second peak valley section and the bottom surface, the first peak section and the second peak valley section are arranged opposite to each other, and the first peak valley section and the second peak section are arranged opposite to each other.

7. The inner cylinder assembly according to claim 6, characterized in that: The angles between the first peak section and the second peak section and the bottom surface are in the range of 75° to 90°, and / or The included angles between the first peak-to-valley section and the second peak-to-valley section and the bottom surface are in the range of 10° to 20°.

8. The inner cylinder assembly according to claim 6, characterized in that: The heights between the first peak section and the second peak section and the bottom surface are 20 mm to 40 mm, and / or The heights between the first peak-to-valley section and the second peak-to-valley section and the bottom surface are 10 mm to 30 mm respectively.

9. The inner cylinder assembly according to claim 1, characterized in that: The distance between the first bottom edge portion and the second bottom edge portion ranges from 70 mm to 80 mm.

10. The inner cylinder assembly according to claim 1, characterized in that: The lifting ribs extend along the axial direction of the inner tube, and / or A plurality of first through holes are disposed on the first curved side wall and the second curved side wall, a plurality of second through holes are disposed on the curved top wall, and a diameter of the first through hole is smaller than a diameter of the second through hole.

11. A washing machine, characterized in that: Comprising the inner barrel assembly according to any one of claims 1-10.

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