Washing tubs and front-loading washing machines

Abstract

A washing tub includes an outer tub and an inner tub rotatably disposed within the outer tub. A rotational gap exists between the inner wall of the outer tub and the outer wall of the inner tub. The outer tub includes a bottom and a lid connected to the front end of the bottom. The outer tub is characterized by having a first arc-shaped portion at the top, a second arc-shaped portion at the bottom, and vertical portions on both sides connecting the first and second arc-shaped portions in the annular direction at the connection between the lid and the bottom. This utility model also discloses a drum washing machine. The flattened portion is closer to the side wall of the casing, reducing the horizontal space occupied by the outer tub, thereby facilitating an increase in the inner diameter length of the outer tub and allowing for the accommodation of a larger diameter inner tub.

Description

Technical Field

[0001] This utility model relates to a washing structure, particularly a washing tub, and also to a drum washing machine. Background Technology

[0002] During use, a washing machine washes clothes by rotating the inner drum inside the outer drum. Therefore, a larger inner drum diameter provides a larger tumbling diameter, resulting in greater tumbling force and improved washing performance.

[0003] To increase the inner drum diameter, many technical solutions have been disclosed in the prior art. See Chinese invention patent application publication CN106283509A (application number 201510289879.0), entitled "Washing Machine Outer Drum and Washing Machine." In this application, the two opposite side walls of the washing machine's outer drum form non-circular surfaces to avoid collision with the side panels of the casing. While keeping the washing machine casing unchanged, this design fully utilizes the internal space of the washing machine, increasing the outer drum diameter and consequently the inner drum diameter. However, this irregular design on both sides has a limited effect on increasing the drum diameter, generally only 5-10 mm. You can also refer to the Chinese invention patent application publication "A Drainage Structure and Drainage Method for a Washing Machine" (application publication number CN108797022A) with application number 201711007289.X. This application achieves the purpose of normal drainage of the washing machine by setting a conical inner drum, an inner drum door cover, and a central drain in the inner drum. However, this application belongs to the design without an outer drum, the inner drum door cover and the central drain are highly complex, the reliability of the movable door cover is low, the central drain cannot be completely drained, and the drying function cannot be realized because the inner drum has no holes.

[0004] Although existing technologies offer improvement solutions, the limited width of the outer casing of drum washing machines prevents the inner tub diameter from being further increased. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a washing tub with an increased diameter, in view of the above-mentioned technical status quo.

[0006] The second technical problem to be solved by this utility model is to provide a drum washing machine with an increased tub diameter, in view of the above-mentioned technical status quo.

[0007] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: a washing tub, including an outer tub and an inner tub rotatably disposed inside the outer tub, wherein there is a rotation gap between the inner wall of the outer tub and the outer wall of the inner tub, the outer tub includes a tub bottom and a tub cover connected to the front end of the tub bottom, characterized in that the outer tub includes a first arc-shaped portion at the top, a second arc-shaped portion at the bottom, and a flat portion on both sides connecting the first arc-shaped portion and the second arc-shaped portion in the annular direction at the connection between the tub cover and the tub bottom.

[0008] The preferred connection method between the bottom of the bucket and the lid is as follows: the front port edge of the bottom of the bucket has an annular insertion groove, and correspondingly, the rear port edge of the lid is inserted into the insertion groove and connected as a whole.

[0009] Furthermore, the outer periphery of the inner barrel has a radially inwardly recessed annular clearance groove, which is located near the connection between the barrel lid and the barrel bottom.

[0010] Furthermore, the inner wall of the inner tub is provided with multiple lifting ribs at intervals. The lifting ribs are strip-shaped and arranged parallel to the axial direction of the inner tub.

[0011] Furthermore, the front end of the bucket lid is provided with a door seal ring.

[0012] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a drum washing machine, including a casing and a washing tub disposed inside the casing.

[0013] Compared with the prior art, the advantages of this utility model are as follows: the side wall of the drum washing machine casing is often flat, and the annular direction at the connection between the drum lid and the bottom of the drum includes a first arc-shaped part at the top, a second arc-shaped part at the bottom, and a flat part on both sides connecting the first arc-shaped part and the second arc-shaped part. The flat part is closer to the side wall of the casing, and the outer drum occupies less space in the horizontal direction, which is conducive to increasing the inner diameter length of the outer drum, and thus can accommodate an inner drum with a larger diameter. Compared with the traditional inner drum, the improved inner drum can reach more than 20mm. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0015] Figure 2 for Figure 1 Enlarged view of the washing tub after removing the casing.

[0016] Figure 3 for Figure 2 A scaled-down exploded view.

[0017] Figure 4 This is a three-dimensional sectional view of a washing tub.

[0018] Figure 5 for Figure 4 Enlarged view of section A.

[0019] Figure 6 This is a magnified view of the bottom of the bucket. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 and Figure 2 As shown, the drum washing machine in this embodiment includes a casing 1 and a washing tub disposed inside the casing 1.

[0022] Combination Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the washing tub includes an outer tub 3 and an inner tub 4 rotatably disposed inside the outer tub 3. There is a rotational gap between the inner wall of the outer tub 3 and the outer wall of the inner tub 4. The outer tub 3 includes a tub bottom 32 and a tub cover 31 connected to the front end of the tub bottom 32. The outer tub 3 includes a first arc-shaped portion 322 at the top, a second arc-shaped portion 323 at the bottom, and flat portions 321 on both sides connecting the first arc-shaped portion 322 and the second arc-shaped portion 323 in the annular direction at the connection between the tub cover 31 and the tub bottom 32.

[0023] The front end of the tub lid 31 is provided with a door seal ring 2. The outer periphery of the inner tub 4 has a radially inwardly recessed annular relief groove 41, which is located near the connection between the tub lid 31 and the tub bottom 32. Multiple lifting ribs 5 are spaced apart on the inner wall of the inner tub 4. The lifting ribs 5 are strip-shaped and arranged parallel to the axial direction of the inner tub 4. The lifting ribs 5 optimize the washing process, improve cleaning effect, and protect clothes.

[0024] Combination Figure 5 As shown, the front port edge of the bucket bottom 32 has an annular insertion groove 33, and correspondingly, the rear port edge of the bucket lid 31 is inserted into the insertion groove 33 and connected as a whole.

[0025] The flat section is closer to the side wall of the casing, and the outer tub occupies less space in the horizontal direction, which is conducive to increasing the inner diameter length of the outer tub, and thus can accommodate an inner tub with a larger diameter. Compared with the traditional inner tub, the improved inner tub can reach more than 20mm.

Claims

1. A washing tub, comprising an outer tub (3) and an inner tub (4) rotatably disposed within the outer tub (3), wherein there is a rotational clearance between the inner wall of the outer tub (3) and the outer wall of the inner tub (4), and the outer tub (3) comprises a tub bottom (32) and a tub cover (31) connected to the front end of the tub bottom (32), characterized in that The aforementioned outer bucket (3) includes a first arc-shaped part (322) at the top, a second arc-shaped part (323) at the bottom, and a flat part (321) on both sides connecting the first arc-shaped part (322) and the second arc-shaped part (323) in the annular direction at the connection between the bucket lid (31) and the bucket bottom (32).

2. The washing tub according to claim 1, characterized in that... The front port edge of the bottom of the bucket (32) has an annular insertion groove (33), and correspondingly, the rear port edge of the lid (31) is inserted into the insertion groove (33) and connected as a whole.

3. The washing tub according to claim 1, characterized in that... The outer periphery of the inner bucket (4) has a radially inwardly recessed annular relief groove (41) near the connection between the bucket lid (31) and the bucket bottom (32).

4. The washing tub according to claim 3, characterized in that... The inner wall of the inner barrel (4) is provided with multiple lifting ribs (5) at intervals.

5. The washing tub according to claim 4, characterized in that... The lifting ribs (5) are strip-shaped and arranged parallel to the axial direction of the inner barrel (4).

6. The washing tub according to claim 1, characterized in that... The front end of the bucket lid (31) is provided with a door seal ring (2).

7. A drum washing machine having the washing tub as described in any one of claims 1 to 6.

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