A self-cleaning drum washing machine

Abstract

The present invention provides a self-cleaning drum washing machine, which relates to the field of washing machines and includes a rotating door body, a washing tub and an outer tub. The second door body of the rotating door body can rotate with the washing tub. A water inlet device is provided on the fixed shaft in the middle of the rotating door body or the input shaft at the rear end of the washing tub. A water path control structure and a fixed arm are provided at the rear end of the washing tub. The self-cleaning drum washing machine provided by the present invention ensures that the washing water does not enter between the inner and outer tubs during the washing process, keeps the space between the washing tub and the outer tub clean, and realizes the function of self-cleaning of the drum washing machine.

Description

Technical Field

[0001] The present invention relates to the field of washing machines, and particularly to a self-cleaning drum washing machine. Background Art

[0002] Currently, most drum washing machines adopt a structure with perforated washing tubs. The washing tub is in communication with the outer tub. Since the inner and outer tubs need to rotate relative to each other, there must be a gap between them. During actual washing or rinsing, tap water needs to fill the gap between the inner and outer tubs. There are two problems. One is that the water between the outer tub and the washing tub does not participate in washing, resulting in a waste of water resources. The other is that over time, serious dirt and mildew will be generated between the outer tub and the washing tub. These dirt and mildew can enter the washing tub through the holes in the washing tub, causing secondary pollution to the clothes. Generally, users cannot disassemble and clean the inner and outer tubs. After long-term use, dirt and grime will accumulate between the inner and outer tubs, and bacteria will breed.

[0003] Based on the drum washing machine, the washing tub is changed to be non-perforated, and at the same time, a water passing channel is provided on the washing tub. The water in the washing tub is discharged through the water passing channel, which solves the problems of water resource waste and secondary pollution caused by the communication between the washing tub and the outer tub, and achieves the effect of self-cleaning between the washing tub and the outer tub.

[0004] However, new problems have arisen: 1. During washing, the washing water in the washing tub is extremely easy to splash between the inner and outer tubs; 2. The liquid level height of the washing water in the washing tub must be lower than the height of the door seal. Therefore, the washing machine can only work at a low water level in the washing tub.

[0005] Therefore, to ensure that the drum washing machine has a good washing effect, it is necessary to improve the door seal of the drum washing machine, and to set a reliable water inlet structure and drainage structure in the washing machine. Summary of the Invention

[0006] The present invention aims to provide a drum washing machine, which is provided with a rotating door body. The drum washing machine is provided with a water inlet device on the fixed shaft of the door body or the rear input shaft of the washing tub, and a water path control device and a drainage device are arranged between the washing tub and the outer tub to achieve a good water inlet and drainage effect.

[0007] To achieve the above object, the technical solution of the present invention is realized as follows:

[0008] A drum washing machine includes a washing tub and an outer tub. The water inlet pipe of the drum washing machine is communicated with the door body at the front end of the washing tub, and / or, is communicated with the rear end of the washing tub; the drum washing machine is further provided with a water path control structure, and the water path control structure is used to close or open a drain hole.

[0009] Further, a central rotating shaft is provided at the rear end of the washing tub. The central rotating shaft passes through the washing tub. The central rotating shaft has a hollow internal structure and is communicated with the water inlet pipe.

[0010] Further, a hollow fixed shaft is provided on the door body at the front end of the washing tub. The fixed shaft is communicated with the water inlet pipe.

[0011] Further, the door body at the front end of the washing tub is a rotating door body. The rotating door body includes a first door body and a second door body. The second door body is rotatably arranged on the first door body through the fixed shaft.

[0012] Further, a drainage structure is provided between the bottom of the washing tub and the outer tub. The drainage holes are arranged on the periphery of the drainage structure, on the side close to the outer tub.

[0013] Further, the drainage structure includes a plurality of fixed arms. The fixed arms extend radially along the drainage structure. The drainage holes are arranged at one end of the fixed arms.

[0014] Further, the water path control structure includes a power device, a linkage piece and a valve. The power device drives the linkage piece to open or close the valve.

[0015] Further, a first rotating shaft is sleeved outside the central rotating shaft. Both the central rotating shaft and the first rotating shaft extend along the axial direction of the washing tub.

[0016] Further, the water path control structure further includes a linkage member and a baffle. The power device drives the first rotating shaft to move along the axial direction of the washing tub, driving the baffle, so that the linkage piece moves.

[0017] Further, a first sealing member is provided between the drainage structure and the washing tub. The first sealing member is used to limit the movement of the central rotating shaft in the radial direction of the washing tub.

[0018] Compared with the prior art, the drum washing machine of the present invention has the following advantages:

[0019] 1. The water inlet pipe is arranged at the front end or the rear end of the washing tub, which is convenient to use and does not occupy extra space.

[0020] 2. A drainage device is provided at the rear end of the washing tub. During the operation of the drum washing machine, the washing water will not enter between the washing tub and the outer tub, ensuring the cleanliness of the washing tub. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] In the accompanying drawings:

[0023] Figure 1 is a schematic structural view of the rotating door body structure of the present invention;

[0024] Figure 2 is a schematic structural view of the rotating door body of the present invention assembled on a drum washing machine;

[0025] Figure 3 is a schematic structural view of the assembly structure of the rotating door body and the drum washing machine of the present invention;

[0026] Figure 4 is a schematic structural view of the water inlet structure of Scheme 1 in Embodiment 3 of the present invention;

[0027] Figure 5 is a schematic structural view of the hollow first door body structure of Scheme 5 in Embodiment 3 of the present invention;

[0028] Figure 6 is a schematic structural view of another perspective of the rotating door body of the present invention;

[0029] Figure 7 is a schematic structural view of the hinge and latch of the rotating door body of the present invention;

[0030] Figure 8 is a schematic structural view of the latch structure of the present invention;

[0031] Figure 9 is an exploded view of the structure of the drum washing machine of the present invention;

[0032] Figure 10 is a schematic structural view of the water inlet channel of the present invention;

[0033] Figure 11 is a schematic structural view of the waterway control structure of the present invention;

[0034] Figure 12 is a schematic structural view of another perspective of the waterway control structure of the present invention;

[0035] Figure 13 is a schematic structural view of the central rotating shaft and the first rotating shaft of the present invention.

[0036] Explanation of reference numerals:

[0037] 1 - First door body, 11 - Fixed shaft, 12 - First flange, 13 - Lock, 131 - Fixed ear, 132 - First catch, 133 - Second catch, 14 - Hinge, 141 - Pin hole, 142 - Fixing member, 142a - Fixing hole, 15 - Handle, 16 - Water inlet channel, 2 - Second door body, 21 - Through hole, 22 - Sealing device, 3 - Outer cylinder, 31 - First outer cylinder, 32 - Second outer cylinder, 33 - Second flange, 4 - Washing tub, 411 - Power device, 412 - Linkage member, 413 - Baffle, 414 - Linkage plate, 415 - Valve, 5 - Rotating device, 51 - Gasket, 52 - Bearing, 6 - Rotating door body, 7 - Water inlet pipe, 8 - Drainage structure, 81 - First seal, 82 - Fixed arm, 83 - Drainage hole, 9 - Central rotating shaft, 91 - Second flange, 10 - First rotating shaft, 101 - First flange, 102 - Second seal. Detailed implementation mode

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0039] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present invention. On the contrary, they are only examples of the devices and methods consistent with some aspects of the present invention.

[0040] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0041] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".

[0042] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] Embodiment 1

[0044] The present application provides a rotating door structure, as Figure 1 shown. The rotating door structure includes a first door body 1 and a second door body 2. The second door body 2 is arranged on the first door body 1 through a rotating device 5, and the second door body 2 can rotate relative to the first door body 1.

[0045] In this embodiment, a fixed shaft 11 is arranged on the first door body 1, and a through hole 21 is arranged on the second door body 2. The second door body 2 passes through the fixed shaft 11 through the through hole 21 and rotates on the first door body 1. In order to improve the rotation effect, a rotating device 5 is arranged at the through hole 21. Preferably, the rotating device 5 includes a gasket 51 and a bearing 52. The outer ring of the bearing 52 is in interference fit with the second door body 2, the inner ring of the bearing 52 is the through hole 21, and the gasket 51 is arranged between the first door body 1 and the second door body 2. At this time, when the second door body 2 rotates, the gasket 51 keeps the rotation plane where the second door body 2 is located in the same plane, and no deviation phenomenon will occur, avoiding friction or damage to the first door body 1 when the second door body 2 rotates.

[0046] Without limitation, the fixed shaft 11 can also be arranged on the second door body 2, and the through hole 21 is arranged on the first door body 1, that is, the fixed shaft 11 can be arranged on either the first door body 1 or the second door body 2, and at the same time, the through hole 21 can also be arranged on the first door body 1 or the second door body 2.

[0047] Preferably, both the first door body 1 and the second door body 2 are circular. The radius of the second door body 2 is smaller than that of the first door body 1. The first door body 1 and the second door body 2 are concentrically arranged, and the rotating device 5 is arranged at the center of the first door body 1 and the second door body 2.

[0048] In order to improve the rotation effect of the rotating door structure, a gap with a certain distance is arranged between the first door body 1 and the second door body 2, so that when the second door body 2 rotates on the first door body 1, only friction is generated between the rotating devices 5. Preferably, the first door body 1 and the second door body 2 can also be hermetically arranged, and a layer of lubricating oil is arranged between the two to improve the rotation of the second door body 2.

[0049] Embodiment 2

[0050] As Figures 2 - 3As shown in the figure, the present application also provides a drum washing machine, which includes an outer tub 3, a washing tub 4, and a rotating door body 6. The rotating door body 6 includes a first door body 1 and a second door body 2. The second door body 2 is rotatably arranged on the first door body 1. When the rotating door body 6 is closed, the second door body 2 is used to block the washing tub 4. When the drum washing machine is operating, the second door body 2 can rotate with the washing tub 4; the first door body 1 is fixedly buckled with the outer tub 3 to ensure the normal operation of the drum washing machine under the washing condition.

[0051] Further, a sealing device 22, such as a sealing strip, is provided at the outer edge of the second door body 2. When the rotating door body 6 is closed, the second door body 2 blocks the washing tub 4, and the sealing strip can improve the sealing performance between the two, avoiding the leakage or outflow of washing water from the washing tub 4 when the drum washing machine is running;

[0052] Preferably, for the sealing device 22, in the direction from the second door body 2 to the first door body 1, its width gradually increases. The second door body 2 and the sealing device 22 together form a frustum-shaped structure. When the rotating door body 6 is closed, the sealing device 22 can provide a larger contact area with the washing tub 4, further improving the sealing performance between the second door body 2 and the washing tub 4.

[0053] Further, a first flanging 12 is provided on the first door body 1, and the first flanging 12 protrudes towards the washing tub 4. A second flanging 33 is provided on the lid of the outer tub 3, and the second flanging 33 protrudes towards the side close to the first door body 1; when the rotating door body 6 is closed, the first flanging 12 cooperates with the second flanging 33, and the inner diameter of the first flanging 12 is equal to or slightly larger than the outer diameter of the second flanging 33. When the first door body 1 is closed, the first flanging 12 and the second flanging 33 are closely matched, which can increase the sealing performance between the first door body 1 and the outer tub 3, preventing the leakage of washing water from the washing tub 4 during operation and reducing the noise generated during the operation of the drum washing machine.

[0054] Working principle: When the rotating door body 6 of the drum washing machine is closed, the first door body 1 is fixed on the outer tub 3, and the second door body 2 cooperates with the washing tub 4. When the washing machine is running, the second door body 2 is fixed on the first door body 1. Through the rotating device 5 between the first door body 1 and the second door body 2, the second door body 2 rotates with the washing tub 4. Since the second door body 2 completely seals the washing tub 4, the water level of the washing water in the washing tub 4 can be freely adjusted, breaking through the limitation in traditional drum washing machines that the washing water level must be lower than the door plug. During washing and rinsing, a large amount of washing water can be stored in the washing tub 4, solving the drawback in the prior art that the drum washing machine needs to drain water and rinse multiple times, and improving the washing efficiency of the drum washing machine.

[0055] Such asFigure 2 As shown in the figure, a hinge 14 is provided on the first door body 1. The rotating door body 6 rotates by a certain angle through the hinge 14 to open or close the rotating door body 6. At the other end of the hinge 14, a lock catch 13 is provided on the first door body 1, and a fixing device is provided at the mating part with the outer cylinder 3. The lock catch 13 is locked with the fixing device. The rotating door body 6 and the outer cylinder 3 are opened or closed by means of hinging and a lock catch. When the drum washing machine is running, the lock catch 13 fixes the first door body 1 on the outer cylinder 3, and at this time, the rotating door body 6 of the washing machine cannot be opened. When the washing is finished, the lock catch 13 is opened, and at this time, the rotating door body 6 can be opened for the next operation of the drum washing machine.

[0056] Preferably, a handle 15 is provided on the first door body 1. When the user needs to open the drum washing machine, an external force is applied to the handle 15 to open the lock catch 13, and the rotating door body 6 is opened for the user to use.

[0057] Specifically, as Figures 6 - 8 shown in the figure, the hinge 14 includes a pin shaft 141 and a fixing member 142. The rotating door body 6 is fixed on the fixing member 142 through the pin shaft 141, and the fixing member 142 is fixed on the outer tub 3 through a fixing device passing through the fixing hole 142a. On the first door body 1, opposite to the other end of the hinge 14, a fixing ear 131 is provided, and a fixing hole is provided between the fixing ears. The fixing shaft passes through the fixing hole to fix the lock catch 13 on the first door body 1.

[0058] A rotatable first hook 132 is provided on the lock catch 13, and a second hook 133 is fixedly provided at a corresponding position on the outer cylinder 3. When the rotating door body 6 is closed, the first hook 132 and the second hook 133 are tightly hooked and engaged to tightly lock the lock catch 13 on the outer cylinder 3. An external force is applied to the lock catch 13 to drive the first hook 132 to rotate and fall off from the second hook 133, and the unlocking process can be completed.

[0059] More preferably, the washing tub 4 is a tub without holes, and no drain hole is provided on the washing tub 4. Therefore, the washing water cannot enter between the inner and outer cylinders of the washing machine, providing a closed washing space and a good washing environment for the washing machine, and realizing the function of a self-cleaning drum washing machine.

[0060] Embodiment 3

[0061] In this embodiment, a water inlet device is provided on the rotating door body of the drum washing machine, and the water inlet device passes through the rotating door body 6 to supply washing water to the washing machine.

[0062] Solution 1

[0063] As Figure 4As shown, the fixed shaft 11 of the rotating door body 6 is of a hollow structure. When the drum washing machine is in use, the user directly connects the water inlet pipe 7 to the fixed shaft 11, and the water flows from the water inlet pipe 7 into the fixed shaft 11 and then into the washing tub 4, thus completing the water inlet process. The whole operation process is simple and convenient, and easy to use. There is no need to set up redundant water inlet devices on the drum washing machine, which saves the internal space of the washing machine and at the same time makes the appearance of the washing machine beautiful and generous.

[0064] Solution 2

[0065] As Figures 2 - 3 shown, on the basis of Solution 1, an inlet channel 16 is provided between the water inlet pipe 7 and the hollow fixed shaft 7. The water flows from the water inlet pipe 7, through the inlet channel 16, and then into the hollow fixed shaft 7 with a middle hole and into the washing tub 4. Specifically, a water inlet pipe 7 is provided on the first door body 1, the water inlet pipe 7 is communicated with an external water guide pipe, an inlet channel 16 is provided on the first door body 1, and the water inlet pipe 7 is communicated with the inlet channel 16; the first door body 1 and the second door body 2 are concentrically arranged, and the fixed shaft 11 between the first door body 1 and the second door body 2 is a hollow rotating shaft; the inlet channel 16 is connected to the fixed shaft 11, and the water flows from the water inlet pipe 7 through the inlet channel 16 and then into the hollow channel of the fixed shaft 11 and reaches the washing tub 4 for washing.

[0066] In Figure 2 this case, the inlet channel 16 is arranged on the outer side of the first door body 1. Without limitation, the inlet channel 16 can also be arranged on the inner side of the first door body 1, that is, on the side of the first door body 1 close to the second door body 2. At this time, the inlet channel 16 cannot be seen from the outside, improving the aesthetics of the water inlet structure.

[0067] Preferably, the water inlet pipe 7 is arranged at the hinge 14 of the first door body 1. When the rotating door body 6 is opened or closed, the position of the water inlet pipe 7 is fixed, facilitating the water flow. The inlet channel 16 is arranged on the first door body 1, one end of which is communicated with the water inlet pipe 7, and the other end is communicated with the hollow fixed shaft 11 at the center of the first door body 1.

[0068] Solution 3

[0069] On the basis of Solution 2, this solution further improves the inlet channel 16. A groove matching the inlet channel 16 is provided on the first door body 1, and the groove is used to place the inlet channel 16. For example, on the outer side of the first door body 1, the inlet channel 16 is arranged in the groove, ensuring that the side of the first door body 1 facing the user is flat and increasing the aesthetics of the drum washing machine.

[0070] Preferably, the groove for placing the inlet channel 16 is arranged between the first door body 1 and the second door body 2. At this time, the water inlet structure cannot be seen from the outside.

[0071] Solution 4

[0072] In Solution 3, the groove provided on the first door body 1 can also directly serve as the water inlet channel 16. In this case, there is no need to specifically provide the water inlet channel 16, and the water inlet pipe 7 is directly connected to the groove. The water flows into the hollow fixed shaft 11 through the groove, saving the use of materials and simplifying the water inlet structure of the washing machine. A groove is provided on the first door body 1 from the outer edge of the first door body 1 to the fixed shaft 11. One end of the groove located at the outer edge of the first door body 1 is connected to the water inlet pipe, and the other end of the groove is directly connected to the fixed shaft 11. This groove is used to act as the water inlet channel, so that water enters the groove from the water inlet pipe 7 and then is introduced into the fixed shaft 11 through the groove, and then enters the washing tub 4 of the washing machine to complete water injection. The shape of this groove can be a straight groove type, a curved type or a snake type, so that the length of the water inlet path can be adjusted according to its shape.

[0073] The water inlet pipe 7 can also be fixed in the groove and connected to the fixed shaft 11 to complete the connection of the water path.

[0074] Preferably, the groove serving as the water inlet channel is provided between the first door body 1 and the second door body 2, and in this case, the water inlet structure cannot be seen from the outside.

[0075] Solution 5

[0076] As Figure 5 shown, in this solution, the first door body 1 has an internal hollow structure. There is a water inlet provided on one side of the first door body 1. After the water from the water inlet pipe 7 enters the water inlet, the entire hollow first door body 1 serves as the water inlet channel, and the water flows into the middle fixed shaft 11 and then into the washing tub 4.

[0077] Or in the hollow first door body 1, there is a groove for placing the water inlet channel 16 and / or a groove for serving as the water inlet channel 16. One end of this groove is connected to the water inlet pipe 7, and the other end is connected to the fixed shaft. It has the same shape as the groove in Solution 4, and the shape of this groove can also be set the same as that in Solution 4, and the length of the water inlet path can be adjusted according to the shape.

[0078] To facilitate the installation between the washing tub 4 and the outer tub 3, the outer tub 3 is set as a first outer tub 31 and a second outer tub 32 that can be disassembled and combined. At the intersection of the first outer tub 31 and the second outer tub 32, there is a raised circular fixing member. The first outer tub 31 and the second outer tub 32 are fixedly connected together by passing through the fixing member by riveting or screwing. When installing the washing tub 4, the first outer tub 31 and the second outer tub 32 can be installed successively, which is convenient for the production of the drum washing machine.

[0079] In order to facilitate the installation between the washing tub 4 and the outer tub 3, the outer tub 3 is provided with a first outer tub 31 and a second outer tub 32 that can be separated and combined. A raised annular fixing piece is provided at the intersection of the first outer tub 31 and the second outer tub 32. The first outer tub 31 and the second outer tub 32 are fixedly connected together by riveting or screwing through the fixing piece. When the washing tub 4 is installed, the first outer tub 31 and the second outer tub 32 can be installed one after another, which is convenient for the production of the drum washing machine.

[0080] Example 4

[0081] Based on the third embodiment, the position of the water inlet device on the washing tub 4 is improved in this embodiment.

[0082] like Figure 9 As shown, the rear end of the washing tub 4 is connected to the power input device of the drum washing machine. The central shaft 9 of the drum washing machine has an internal hollow channel. The water inlet device is connected to the central shaft 9, and water enters the washing tub 4 from the central shaft 9 for washing.

[0083] Specifically, the washing tub 4 is rotatably arranged in the outer drum 3 around a horizontal rotating shaft, one end of the rotating shaft is fixedly connected to the washing tub 4, and the other end is connected to the driving device, the rotating shaft includes a central rotating shaft 9 and a first rotating shaft 10 sleeved outside the central rotating shaft 9, and the central rotating shaft 9 and the first rotating shaft 10 both extend along the axial direction of the washing tub 4;

[0084] A bottom plate 8 is provided between the washing tub 4 and the second outer tube 32, and a protrusion is provided on one side of the bottom plate 8 close to the washing tub 4, a water channel is provided in the protrusion, and the protrusion is consistent with the washing tub 4;

[0085] The first rotating shaft 10 is provided with a first flange 101, and the first flange 101 is provided with a plurality of fixing holes; the first rotating shaft 10 cooperates with the base plate 8, and a fixing device such as a screw passes through the fixing holes on the first flange 101 to connect and fix the first rotating shaft 10 with the base plate 8.

[0086] The central shaft 9 is provided with a second flange 91 , and the second flange 91 is also provided with a plurality of fixing holes. The second flange 91 is also fixed to the bottom plate 8 by a fixing device.

[0087] The central rotating shaft 9 is connected to the water inlet pipe 7, and the washing water flows from the water inlet pipe 7 into the central rotating shaft 9, and then flows into the washing tub 4 for washing. Alternatively, the water inlet pipe 7 passes through the central rotating shaft 9 into the interior of the washing tub 4, and directly enters the washing tub 4 for washing.

[0088] A first sealing member 81 is disposed between the bottom plate 8 and the washing tub 4 , and the first sealing member 81 is installed on a side away from the washing tub 4 .

[0089] A second seal 102 is also provided between the first rotating shaft 10 and the water inlet pipe 7. The second seal is used to prevent leakage through the gap of the water inlet pipe 7 and improve the sealing performance.

[0090] The first seal 81 and the second seal 102 can also limit the radial displacement of the central rotating shaft 9 and the first rotating shaft 10, thereby effectively reducing the vibration and noise of the washing tub 4 during the washing process.

[0091] Driven by the driving member, the washing tub 4 rotates with the central rotating shaft 9 and the first rotating shaft 10 to realize the rotary washing of the washing tub 4.

[0092] Embodiment 5

[0093] As Figures 9 - 13 shown, in this embodiment, a water path control structure 41 and a drainage channel 82 are provided at the bottom of the washing tub 4. The drainage channel 82 is closed or opened by the water path control structure 41.

[0094] The water path control structure 41 includes a power device 411, a linkage 412, a baffle 413, a linkage piece 414, and a valve 415. The power device 411 can be a cylinder, an electromagnetic device, etc. The power device 411 drives the linkage 412 to move the baffle 413 in the axial direction of the washing tub 4.

[0095] A plurality of drainage channels 82 are provided on the bottom plate 8. A drainage hole 83 is provided at a position away from the center of the bottom plate 8 in the radial direction of the bottom plate 8. The drainage hole 83 is located on the drainage channel 82.

[0096] Driven by the power device 411, the linkage 412 is controlled to move in the axial direction of the washing tub 4, and then the baffle 413 moves in the axial direction, triggering the linkage piece 414 to control the opening or closing of the valve 415, thereby discharging the washing water in the washing tub 4.

[0097] Specifically, a plurality of drainage channels 82 are provided on the bottom plate 8. A drainage hole 83 is provided at a position away from the center of the bottom plate 8 in the radial direction of the bottom plate 8. The power device 411 drives the linkage 412 to move in the axial direction of the washing tub 4. A certain slope is provided at the mating part of the linkage 412 and the first rotating shaft 10 to drive the first rotating shaft 10 to move in the axial direction of the washing tub 4, and then drive the baffle 413 to move in the axial direction. The baffle 413 cooperates with the linkage piece 414 to drive the opening and closing of the valve 415 to realize the discharge function of the washing water. A torsion spring is provided on the linkage piece 414 to enable the linkage piece 414 to automatically return to its original position.

[0098] The bottom plate 8 and the bottom of the washing tub 4 form a closed space. The bottom of the washing tub 4 is provided with a flanging, and the third flanging cooperates with the second outer cylinder 32. The washing water in the washing tub 4 flows out from the drain hole 83 through the drain channel 82, and flows into the water accumulation cavity between the washing tub 4 and the second outer cylinder 32, and then discharges the washing water to the outside of the washing machine.

[0099] When the washing tub 4 rotates for washing, the washing water will not enter between the inner and outer cylinders, realizing the function of self-cleaning. At the same time, the present invention also simplifies the structures of the water inlet pipe and the drain pipe, and improves the reliability and service life of the drum washing machine.

[0100] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drum washing machine, comprising a washing tub (4) and an outer tub (3), characterized in that: The rear end of the washing tub (4) is connected to the power input device of the drum washing machine. The central rotating shaft (9) of the drum washing machine has an internally hollow channel. The water inlet device is connected to the central rotating shaft (9), and water enters the washing tub (4) from the central rotating shaft (9) for washing; The washing tub (4) is a perforation-free inner tub; The washing tub (4) is rotatably arranged in the outer tub (3) around a horizontal rotating shaft. One end of the rotating shaft is fixedly connected to the washing tub (4), and the other end is connected to the driving device. The rotating shaft includes a central rotating shaft (9) and a first rotating shaft (10) sleeved outside the central rotating shaft (9). Both the central rotating shaft (9) and the first rotating shaft (10) extend along the axial direction of the washing tub (4); A bottom plate (8) is arranged between the bottom of the washing tub and the outer tub. A protrusion is arranged on the side of the bottom plate (8) close to the washing tub (4). A water channel is arranged in the protrusion, and the protrusion fits with the washing tub (4); A water channel control structure (41) and a drainage channel (82) are arranged at the bottom of the washing tub (4). The drainage channel (82) is closed or opened through the water channel control structure (41); The water channel control structure (41) includes a power device (411), a linkage member (412), a baffle (413), a linkage piece (414), and a valve (415); Multiple drainage channels (82) are arranged on the bottom plate (8). A drainage hole (83) is arranged at a position away from the center of the bottom plate (8) in the radial direction of the bottom plate (8). The drainage hole (83) is located on the drainage channel (82). The water channel control structure is used to close or open the drainage hole (83); The power device (411) drives the linkage member (412) to move in the axial direction of the washing tub (4). A certain slope is arranged at the cooperation position between the linkage member (412) and the first rotating shaft (10) to drive the first rotating shaft (10) to move in the axial direction of the washing tub (4), and then drive the baffle (413) to move in the axial direction. The baffle (413) cooperates with the linkage piece (414) to drive the opening and closing of the valve (415) to realize the discharge function of the washing water. A torsion spring is arranged on the linkage piece (414) so that the linkage piece (414) can automatically return to its original position; A closed space is formed between the bottom plate (8) and the bottom of the washing tub (4). The washing water in the washing tub (4) flows out from the drainage hole (83) through the drainage channel (82) and flows into the water accumulation cavity between the washing tub (4) and the second outer tub (32), and then the washing water is discharged outside the washing machine.

2. The drum washing machine according to claim 1, characterized in that, A central rotating shaft (9) is arranged at the rear end of the washing tub (4). The central rotating shaft (9) passes through the washing tub (4). The central rotating shaft (9) has an internally hollow structure, and the central rotating shaft (9) is connected to the water inlet pipe (7).

3. The drum washing machine according to claim 1, characterized in that, The door body at the front end of the washing tub (4) is a rotating door body (6). The rotating door body (6) includes a first door body (1) and a second door body (2). The second door body (2) is rotatably arranged on the first door body (1) through a fixed shaft (11).

4. The drum washing machine according to claim 1, characterized in that, A first seal (81) is provided between the bottom plate (8) and the washing tub (4), and the first seal (81) is used to define the movement of the central rotating shaft (9) in the radial direction of the washing tub (4).

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