WO2014205672A1

WO2014205672A1 - Inner drum for washing machine, manufacturing method therefor, and washing machine

Info

Publication number: WO2014205672A1
Application number: PCT/CN2013/078000
Authority: WO
Inventors: 康菲; 黄升野; 殷培杰
Original assignee: 无锡小天鹅股份有限公司
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-12-31

Abstract

Disclosed are an inner drum (100) for a washing machine, a manufacturing method therefor, and a washing machine. The inner drum (100) is provided with a bottom side and a top side which are oppositely arranged; and a plurality of radially outwardly protruding flow guiding slots (1), which extend in an axial direction and are spaced apart from each other, are formed on the inner drum (100), wherein at least some of the flow guiding slots (1) extend from a position near the bottom side to the top side and the outwardly protruding depths are gradually increased, slot bottoms (12) of at least some of the flow guiding slots (1) form an outwardly protruding conical contour on at least an upper-end portion of the cylindrical inner drum (100), and water drainage holes (2) are formed in the vicinity of the top sides of at least some of the flow guiding slots (1).

Description

Inner cylinder for washing machine, manufacturing method and washing machine thereof

Technical field

The present invention relates to the field of electrical appliances, and more particularly to an inner cylinder for a washing machine, a manufacturing method thereof, and a washing machine therefor. Background technique

The side wall of the inner tube of the conventional washing machine has substantially no dewatering holes, which causes the moisture in the clothes and fabrics to be discharged out of the inner tube in time when dehydration, and there is a problem that the clothes and the fabric are dehydrated and uneven. A relatively popular side wall of the cylinder is a slanted conical inner cylinder, which better solves the problem of dehydration and unevenness, but the conical barrel unfolding piece is fan-shaped, when scraping and rolling Problems such as low yields lead to high production costs and are not suitable for mass production. The popularization of water-saving and environmentally-friendly washing machines has an urgent need for a non-porous inner cylinder technology with good dewatering effect and low cost. Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

To this end, an object of the present invention is to provide an inner cylinder for a washing machine which has a good dewatering effect, uniform dehydration and low cost.

Another object of the present invention is to provide a method of manufacturing an inner cylinder for manufacturing the above-described washing machine.

It is still another object of the present invention to provide a washing machine having the above inner cylinder.

An inner cylinder for a washing machine according to an embodiment of the first aspect of the present invention, wherein the inner cylinder has a substantially cylindrical shape, the inner cylinder has oppositely disposed bottom sides and a top side; and a plurality of axial axes are formed on the inner cylinder To a radially outwardly convex flow guiding groove extending and spaced apart from each other, at least a part of the flow guiding groove extends from the vicinity of the bottom side toward the top side and the convex depth gradually increases, and the groove bottom of the at least part of the guiding groove At least an upper end portion of the cylindrical inner cylinder constitutes a convex tapered contour, and a drain hole is formed in the vicinity of a top side of the at least partial flow guiding groove.

According to the inner cylinder of the washing machine according to the embodiment of the present invention, by providing the guide groove and the drainage hole, moisture generated during centrifugal dewatering of clothes, fabrics, or the like can be discharged through the drainage hole through the drainage groove, and the inner cylinder is ensured for clothing, When the fabric is less worn, the dewatering performance of the inner cylinder is effectively improved, and by adopting a substantially cylindrical inner cylinder, the versatility is good, the processing is convenient, and the manufacturing cost is reduced. Further, by providing the drain hole in the upper portion of the guide groove, the wear of the drain hole to the clothes and the fabric is effectively prevented.

Further, the inner cylinder for a washing machine according to the present invention may have the following additional technical features:

According to an embodiment of the present invention, each of the flow guiding grooves comprises: two side walls, the two side walls are spaced apart from each other in a circumferential direction of the inner cylinder and one end is respectively connected to the inner cylinder; And a groove bottom, two ends of the groove bottom are respectively connected to the free ends of the two side walls.

Specifically, each of the flow guiding grooves is configured such that a distance between the groove bottom of the flow guiding groove and the inner wall of the inner cylinder gradually increases from bottom to top. Thereby, the water droplets centrifugally ejected in the clothes, the fabric, and the like during dehydration can be drained in time, the moisture content of the laundry, the fabric, and the like after dehydration can be remarkably reduced, and the uniformity of dehydration can be greatly improved. Further, an angle between the groove bottom of the flow guiding groove and a central axis of the inner cylinder is ^, wherein ^ is configured as: t _{an y} 5 = (r2 - rl) / /i, Wherein the distance between the bottom of the groove at the lower end of the flow guiding groove and the central axis of the inner cylinder is rl, and between the bottom of the upper end of the guiding groove and the central axis of the inner cylinder The distance is r2, and the height of the guide groove in the up and down direction is h.

Specifically, the rl is half the inner diameter of the inner cylinder. Thereby, it is greatly facilitated that the lower water enters the diversion trough and climbs upward along the trough wall of the diversion trough.

Optionally, a smooth transition between the two side walls and the bottom of the groove is respectively performed. Thereby, the moisture released from the clothes, the woven fabric or the like has a good flow guiding effect, and the laundry and the fabric are not easily worn.

According to an embodiment of the invention, each of the flow guiding grooves extends in a straight line in the up and down direction. Thereby, the drainage effect is better, and the moisture is quickly discharged from the inner cylinder.

According to another embodiment of the present invention, a plurality of the flow guiding grooves are formed parallel to each other and obliquely formed on the inner cylinder.

According to an embodiment of the invention, at least one protrusion is provided between two adjacent flow guiding grooves. Thereby, by providing the projections, it is possible to effectively prevent the clothes, the fabric, and the like from being pressed into the guide grooves, and further improve the dewatering efficiency of the inner cylinder. In addition, reducing the inner cylinder material reduces costs.

Further, a plurality of protrusions are disposed between the two adjacent flow guiding grooves, and the plurality of protrusions are spaced apart from each other in the up and down direction.

Optionally, each of the projections is recessed radially inward from a peripheral wall of the inner cylinder.

According to an embodiment of the invention, the inner cylinder and the flow guiding groove on the inner cylinder are formed by stamping.

According to an embodiment of the invention, the inner cylinder is formed from a stainless steel web.

A method for manufacturing an inner cylinder for a washing machine according to an embodiment of the second aspect of the present invention, comprising: providing a rectangular tubular body piece having oppositely disposed bottom sides and a top side; The web is stamped outwardly to form a plurality of radially outwardly convex guide grooves extending in the axial direction and spaced apart from each other. At least a part of the flow guiding grooves extend from the vicinity of the bottom side toward the top side and the convex depth gradually increases. a drainage hole is formed in the vicinity of the top side of the at least part of the flow guiding groove; the rectangular tubular body piece formed with the flow guiding groove is connected to form a cylindrical inner cylindrical body, wherein the at least part of the guiding groove At least the upper end portion of the cylindrical inner cylinder of the groove bottom constitutes a convex convex profile.

The inner cylinder manufacturing method for a washing machine according to an embodiment of the present invention is simple in processing, suitable for mass production, and low in cost.

A washing machine according to an embodiment of the third aspect of the present invention, comprising: a body; and an inner cylinder for a washing machine according to the first aspect of the invention, wherein the inner cylinder is disposed in the body.

According to the washing machine of the embodiment of the present invention, by providing the inner cylinder of the above embodiment, the moisture content of the laundry, the fabric, and the like after dehydration is effectively reduced, and the clothing, the fabric, etc. are improved, in the case where the abrasion of the laundry, the fabric, and the like is small. Dehydration uniformity.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a top plan view of an inner cylinder for a washing machine in accordance with one embodiment of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

3a-3c are cross-sectional views taken along line B-B, line C-C, and line D-D of Fig. 2, respectively;

Figure 4 is a developed view of the inner cylinder shown in Figure 1;

Figure 5 is a cross-sectional view of an inner cylinder for a washing machine in accordance with another embodiment of the present invention;

6a-6c are cross-sectional views taken along lines E-E, F-F, and G-G of Fig. 5, respectively;

Figure 7 is a developed view of the inner cylinder shown in Figure 5;

Figure 8 is a plan view of an inner cylinder for a washing machine in accordance with still another embodiment of the present invention;

Figure 9 is a cross-sectional view taken along line H-H of Figure 8;

Figure lOa-lOc are cross-sectional views taken along line I-I, line J-J, and line K-K of Figure 9, respectively;

Figure 11 is a developed view of the inner cylinder shown in Figure 8. Description of the reference signs:

100: inner cylinder;

1: guide groove; 11: side wall; 12: groove bottom; 2: drainage hole; 3: raised. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative only and not to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", The orientation or positional relationship of the "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or component referred to has a particular orientation, is constructed and operated in a particular orientation and is therefore not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece; can be directly connected, or indirectly connected through an intermediate medium, and can be internal to the two elements. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

An inner cylinder 100 for a washing machine according to an embodiment of the first aspect of the present invention, which can be used in a pulsator washing machine, will be described below with reference to Figs. In the following description of the present application, the inner cylinder 100 is used for a pulsator washing machine as an example. Of course, those skilled in the art will appreciate that the inner cylinder 100 can also be used for other types of laundry. In the machine, not limited to the washing machine.

As shown in Figs. 1, 2 and 4, an inner cylinder 100 for a washing machine in accordance with an embodiment of the first aspect of the present invention. The inner cylinder 100 is substantially cylindrical, and the inner cylinder 100 has oppositely disposed bottom sides (lower sides as shown in FIGS. 2, 5, and 9) and a top side (as shown in FIGS. 2, 5, and 9). On the inner cylinder 100, a plurality of radially outwardly convex guide grooves 1 extending in the axial direction and spaced apart from each other are formed.

Referring to Figures 1, 2 and 4, the inner cylinder 100 has a substantially circular cross-sectional shape, and a plurality of flow guiding grooves 1 are formed on the peripheral wall of the inner cylinder 100, and a plurality of flow guiding grooves 1 are circumferentially of the inner cylinder 100. They are spaced apart from each other, and in particular, each of the flow guiding grooves 1 is recessed radially outward from the inner wall of the inner cylinder 100. Here, it should be noted that "outward" can be understood as a direction from the central axis of the inner cylinder 100 in the radial direction thereof toward the peripheral wall of the inner cylinder 100.

At least a portion of the flow guiding groove 1 extends from the vicinity of the bottom side toward the top side and the convex depth gradually increases, and at least a portion of the groove bottom 12 of the flow guiding groove 1 forms a convex contour on at least the upper end portion of the cylindrical inner cylinder Wherein the drainage hole 2 is formed in the vicinity of the top side of at least part of the flow guiding groove 1. That is, the depth of at least one of the plurality of flow guiding grooves 1 gradually increases radially outward in the direction from bottom to top, and the groove at the upper end of the at least one flow guiding groove 1 The bottom 12 is formed in a tapered shape and a drain hole 2 is formed at the upper end.

Further, as shown in FIG. 1, FIG. 2 and FIG. 4, four sets of guide grooves 1 are formed on the peripheral wall of the inner cylinder 100, and the four sets of guide grooves 1 are evenly distributed in the circumferential direction of the inner cylinder 100, that is, The angle between the adjacent two sets of guiding channels 1 is substantially 90°. Further, each group of guiding channels 1 includes a plurality of guiding channels 1 spaced apart from each other, optionally, each group of diversions The distance between the two adjacent flow guiding grooves 1 in the groove 1 is equal, respectively, so that the dehydration uniformity of the clothes and the fabric can be improved. It should be noted that the outermost circumference of the inner cylinder 100 in Fig. 1 is formed by the outermost bead of the upper portion of the inner cylinder 100 in Fig. 2.

In the examples of FIG. 2, FIG. 4, FIG. 9 and FIG. 11, the plurality of flow guiding grooves 1 are parallel to each other and each of the flow guiding grooves 1 extends in the up and down direction, and the upper end and the lower end of each of the flow guiding grooves 1 are respectively The upper end surface and the lower end surface of the inner cylinder 100 are adjacent to each other. In the examples of Figs. 5 and 7, the plurality of flow guiding grooves 1 are parallel to each other. It should be understood that the size of the guide groove 1 and the distance between the adjacent flow guiding grooves 1 can be set according to actual requirements to better meet the actual requirements.

As shown in FIG. 2, FIG. 4, FIG. 5, FIG. 7, FIG. 9 and FIG. 11, each of the guide grooves 1 is formed with a drainage hole 2 at the upper end thereof, and moisture on the clothes and the fabric can be drained through the guide groove 1. The hole 2 is discharged.

When the washing machine performs the dehydrating operation on the clothes and the fabric in the inner cylinder 100, the moisture in the laundry and the fabric is sucked onto the wall of the inner cylinder 100, and the water will climb upward along the groove wall of the guiding groove 1 after being collected. The inner cylinder 100 is discharged through the upper drain hole 2, and finally discharged outside the washing machine. In this process, since the extracted water is drained in time, the centrifugal dewatering is continued, thereby effectively reducing the moisture content of the laundry and the fabric after dehydration, and improving the uniformity of dehydration of the laundry and the fabric.

According to the inner cylinder 100 for a washing machine according to an embodiment of the present invention, by providing the flow guiding groove 1 and the drainage hole 2, moisture generated during centrifugal dehydration of clothes, fabrics, or the like can be discharged through the drainage hole 2 through the drainage groove 1, in ensuring The inner cylinder 100 effectively improves the dewatering performance of the inner cylinder 100 in the case where the abrasion of the clothes, the fabric, and the like is small, and the versatility is good, the processing is facilitated, and the manufacturing cost is reduced by adopting the inner cylinder 100 having a substantially cylindrical shape. . In addition, by arranging The water hole 2 is provided at the upper portion of the flow guiding groove 1, and the wear of the laundry hole and the fabric by the drainage hole 2 is effectively prevented. In an embodiment of the invention, each of the flow guiding grooves 1 comprises: two side walls 11 and a groove bottom 12, the two side walls 11 are spaced apart from each other in the circumferential direction of the inner cylinder 100, and the two side walls 11 One end is connected to the inner cylinder 100, respectively. For example, in the examples of FIGS. 3b, 6b, and 10b, the two side walls 11 are spaced apart from each other in the left-right direction, and the distance between the two side walls 11 in the radial direction of the inner cylinder 100 is gradually reduced, each One end of the side wall 11 adjacent to the peripheral wall of the inner cylinder 100 is connected to the inner cylinder 100. Of course, the present invention is not limited thereto, and in other examples of the present invention, the distance between the two side walls 11 spaced apart from each other in the radial direction of the inner cylinder 100 may be equal or gradually increased (not shown).

In the examples of Figures 3b, 6b and 10b, the two ends of the groove bottom 12 are respectively connected to the free ends of the two side walls 11 (upper ends as shown in Figures 3b, 6b and 10b), optionally The groove bottom 12 can be constructed as a plane or a curved surface.

Specifically, each of the flow guiding grooves 1 is configured such that the distance between the groove bottom 12 of the lower to upper flow guiding groove 1 and the groove bottom 12 of the inner cylinder 100 is gradually increased. Referring to Figures 2, 3, 5, 6, 9, and 10, the distance between the groove bottom 12 of the guide groove 1 and the corresponding groove bottom 12 of the inner cylinder 100 is gradually increased from bottom to top. Large, in other words, the horizontal distance between the central axis of the inner cylinder 100 and the plane of the groove bottom 12 of the flow guiding groove 1 is gradually increased, at this time, the central axis of the inner cylinder 100 and the groove bottom 12 of the flow guiding groove 1 are There is a certain angle between the two, so that by setting the inclined diversion channel 1 which is favorable for drainage, the water droplets centrifugally ejected in the clothes, fabrics and the like during dehydration can be removed in time, and the moisture content of the clothes, fabrics and the like after dehydration can be remarkably reduced. And can greatly improve the uniformity of dehydration.

Further, as shown in Figs. 2 and 9, the pinch between the groove bottom 12 of the guide groove 1 and the central axis of the inner cylinder 100 is β,

Among them, it is constructed as: tan = (r2 - rl)//i

The distance between the bottom 12 of the lower end of the guide groove 1 and the central axis of the inner cylinder 100 is rl, and the distance between the bottom 12 of the upper end of the guide groove 1 and the central axis of the inner cylinder 100 is r2. The height of the guide groove 1 in the up and down direction is h.

That is, referring to FIG. 2, FIG. 5 and FIG. 9, the distance between the groove bottom 12 of the bottom of the guide groove 1 and the central axis of the inner cylinder 100 is rl, the groove bottom 12 and the inner cylinder of the top of the guide groove 1 The distance between the central axes of 100 is r2, and the height of the guide grooves 1 in the axial direction of the inner cylinder 100 is h.

Specifically, rl is half the inner diameter of the inner cylinder 100. At this time, the bottom groove bottom 12 of the guide groove 1 is substantially flush with the corresponding wall surface of the inner cylinder 100, and the guide groove 1 is gradually recessed from the bottom to the upper side in the radial direction of the inner cylinder 100, which greatly facilitates the lower portion. The water enters the flow guiding groove 1 and climbs up the groove wall of the flow guiding groove 1, as shown in Fig. 2, Fig. 3, Fig. 5, Fig. 6, Fig. 9, and Fig. 10.

Optionally, a smooth transition is made between the two side walls 11 and the groove bottom 12, respectively. For example, in the examples of Figures 3a, 3b, 6a, 6b, 10a, 10b, the two side walls 11 and the groove bottom 12 are smoothly transitioned by rounded corners, respectively, so that they are detached from clothes, fabrics, etc. Moisture has a good flow guiding effect and is not easy to wear clothes and fabrics.

In one embodiment of the invention, each of the flow guiding grooves 1 extends in a straight line in the up and down direction. As shown in FIG. 1 to FIG. 4, the guide groove 1 extends in the up-and-down direction and the extending direction of the guide groove 1 is substantially parallel to the central axis of the inner cylinder 100, thereby having a good flow guiding effect and facilitating rapid moisture. The inner cylinder 100 is discharged. Of course, other in the invention In the example, the guide groove 1 may also extend in a vertical direction along a curve such as an arc, along a wavy line or along a fold line (not shown).

Of course, the present invention is not limited thereto, and in another embodiment of the present invention, the plurality of flow guiding grooves 1 may be formed parallel to each other and obliquely formed on the inner cylinder 100. As shown in Fig. 5-7, the guide groove 1 is obliquely formed on the peripheral wall of the inner cylinder 100, and the guide groove 1 is at an angle with the central axis of the inner cylinder 100 (as shown in Fig. 7). It should be understood that the specific value of the angle between the guide groove 1 and the central axis of the inner cylinder 100 can be set according to actual requirements to have a better flow guiding effect.

Further, at least one protrusion 3 is provided between the adjacent two flow guiding grooves 1. As shown in Figures 9-11, a projection 3 is provided between adjacent two flow guiding grooves 1 in each group of guiding grooves 1, and each projection 3 is radially inward from the peripheral wall of the inner cylinder 100. By recessing, by providing the projections 3, it is possible to effectively prevent the laundry, the fabric, and the like from being pressed into the guide groove 1, further improving the dewatering efficiency of the inner cylinder 100, and further reducing the material of the inner cylinder 100, thereby reducing the cost. Of course, in other examples of the invention, the projections 3 may also be formed as ribs (not shown) projecting radially inward from the inner wall of the inner cylinder 100.

Of course, the present invention is not limited thereto. In other embodiments of the present invention, a plurality of protrusions 3 are disposed between two adjacent flow guiding grooves 1, and the plurality of protrusions 3 are spaced apart from each other in the up and down direction. Settings (not shown).

Specifically, referring to Figures 9 and 11, the lower end of the projection 3 is substantially flush with the lower end of the flow guiding groove 1, and the upper end is lower than the upper end of the flow guiding groove 1. It should be understood that the length of the protrusion 3 can be set according to actual requirements to better meet the actual requirements.

In one embodiment of the invention, a drain hole 2 is formed in each of the flow guiding grooves 1, and a drain hole 2 is adjacent to the upper end of the flow guiding groove 1. As shown in FIG. 2, FIG. 5 and FIG. 9, the drain hole 2 is formed at the top of the guide groove 1, and optionally, the shape of the drain hole 2 is circular, elliptical, oblong or at least larger than three sides. Wait.

However, in other embodiments of the present invention, a plurality of drainage holes 2 may be formed in each of the flow guiding grooves 1, and the plurality of drainage holes 2 may be adjacent to the upper end of the flow guiding groove 1 (not shown). In the case where the abrasion of the clothes, the fabric, and the like is small, the dehydration efficiency of the inner cylinder 100 is further improved.

In the above embodiment of the invention, the inner cylinder 100 and the guide groove 1 on the inner cylinder 100 are formed by stamping, wherein the inner cylinder 100 is formed of a stainless steel web. Of course, in other embodiments, the inner cylinder 100 for the washing machine and the guide groove 1 on the inner cylinder 100 may be injection molded, which is not limited herein.

An inner cylinder manufacturing method for manufacturing the above washing machine according to the second aspect of the present invention includes:

Providing a rectangular tubular body piece having a bottom side and a top side opposite to each other;

Forming outwardly on the rectangular tubular web to form a plurality of radially outwardly projecting guide grooves 1 extending in the axial direction and spaced apart from each other, at least part of the flow guiding grooves 1 extending from the vicinity of the bottom side toward the top side and outside The depth of the convexity gradually increases, wherein a drain hole 2 is formed near at least a portion of the top side of the flow guiding groove 1;

The rectangular barrel webs formed with the flow guiding grooves 1 are joined to form a cylindrical inner cylinder body, wherein at least a portion of the bottom end portion of the cylindrical inner cylinder 12 of the flow guiding groove 1 constitutes a convex convex profile.

The inner cylinder manufacturing method for a washing machine according to an embodiment of the present invention is simple in processing, suitable for mass production, and low in cost. A washing machine (not shown) according to an embodiment of the third aspect of the present invention, comprising: a body and an inner cylinder 100 for a washing machine according to the above-described first aspect of the present invention, wherein the inner cylinder 100 is disposed in the body.

According to the washing machine of the embodiment of the present invention, by providing the inner cylinder 100 of the above embodiment, the moisture content of the laundry, the fabric, and the like after dehydration is effectively reduced in the case where the laundry, the fabric, and the like are less worn, and the laundry and the fabric are improved. Equal dehydration uniformity.

Other configurations and operations of a washing machine such as a pulsator washing machine in accordance with an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

claims

1. An inner cylinder for a washing machine, characterized in that the inner cylinder is generally cylindrical, and has a bottom side and a top side that are oppositely arranged; a plurality of axially-directed cylinders are formed on the inner cylinder. Extended and spaced apart radially outwardly convex guide grooves, at least part of the guide grooves extends from near the bottom side toward the top side and the depth of the protrusions gradually increases, the bottom of the at least part of the guide grooves is at At least the upper end of the cylindrical inner cylinder forms a convex tapered profile, wherein a drainage hole is formed near the top side of the at least part of the guide groove.

2. The inner barrel for a washing machine according to claim 1, characterized in that each of the guide grooves includes:

Two side walls, the two side walls are spaced apart from each other in the circumferential direction of the inner cylinder and one end is connected to the inner cylinder respectively;

The two ends of the groove bottom are respectively connected to the free ends of the two side walls.

3. The inner cylinder for a washing machine according to claim 1, wherein each of the guide grooves is configured such that the groove bottom of the guide groove and the inner cylinder are connected from bottom to top. The distance between the inner walls gradually increases.

4. The inner cylinder for a washing machine according to claim 1 or 3, characterized in that the angle between the bottom of the guide groove and the central axis of the inner cylinder is,

where is constructed as:

Wherein, the distance between the groove bottom at the lower end of the guide groove and the central axis of the inner cylinder is rl, and the distance between the groove bottom at the upper end of the guide groove and the central axis of the inner cylinder is The distance is r2, and the height of the guide groove in the up and down direction is h.

5. The inner barrel for a washing machine according to claim 4, wherein the r1 is half of the inner diameter of the inner barrel.

6. The inner barrel for a washing machine according to claim 4, characterized in that there is a smooth transition between the two side walls and the bottom of the tank.

7. The inner barrel for a washing machine according to claim 1, characterized in that each of the guide grooves extends in a straight line in the up and down direction.

8. The inner barrel for a washing machine according to claim 1, characterized in that a plurality of the guide grooves are formed on the inner barrel parallel to each other and obliquely.

9. The inner barrel for a washing machine according to claim 1, characterized in that at least one protrusion is provided between two adjacent guide grooves.

10. The inner barrel for a washing machine according to claim 9, characterized in that a plurality of protrusions are provided between two adjacent guide grooves, and the plurality of protrusions are spaced apart from each other in the up and down direction. Open settings.

11. The inner tub for a washing machine according to claim 9, wherein each of the protrusions is recessed radially inward from the peripheral wall of the inner tub.

12. The inner barrel for a washing machine according to claim 1, characterized in that the inner barrel and the guide groove on the inner barrel are formed by stamping.

13. The inner cylinder for a washing machine according to claim 1 or 12, characterized in that the inner cylinder is formed of a stainless steel piece.

14. A method for manufacturing the inner barrel of the washing machine of claim 1, characterized in that it includes: providing a rectangular barrel body piece, the barrel body piece having oppositely arranged bottom sides and top sides;

A plurality of radially outwardly protruding flow guide grooves extending in the axial direction and spaced apart from each other are formed by punching outward on the rectangular barrel body piece. At least some of the flow guide grooves extend from near the bottom side toward the top side and are outwardly convex. The depth gradually increases, wherein a drainage hole is formed near the top side of the at least part of the diversion channel;

The rectangular cylinder body pieces formed with the guide grooves are connected to form a cylindrical inner cylinder body, wherein at least the upper end of the cylindrical inner cylinder at the bottom of the at least part of the guide grooves forms a convex tapered profile. .

15. A washing machine, characterized in that it includes:

body; and

The inner drum for a washing machine according to any one of claims 1-13, wherein the inner drum is provided in the body.