Drainage sealing device of washing machine and washing machine

Abstract

The present invention provides a drainage sealing device of a washing machine and a washing machine. The washing machine comprises an inner barrel, a drainage hole is provided at the bottom of the inner barrel, and the drainage sealing device is installed at the bottom of the inner barrel, and comprises a sealing mechanism that can be sealed with the drainage hole: when washing or rinsing, the sealing mechanism is sealed with the drainage hole, and washing water is contained in the inner barrel; when draining, the sealing mechanism opens the drainage hole, and the washing water in the inner barrel is discharged from the drainage hole. The drainage sealing device of the present invention is designed on the structure of the inner barrel itself, and the sealing mechanism can make the inner barrel self-sealed. When the washing machine is working, no water will be stored between the inner barrel and the outer barrel, so as to prevent contamination. At the same time, it is also an application of water-saving technology for users. In addition, after the inner barrel is self-sealed by the sealing mechanism, the inner barrel and the impeller can achieve relative rotation, so as to achieve the function of dual-power washing clothes.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage of a non-hole inner barrel washing machine, and in particular to a drainage sealing device of the washing machine and the washing machine. Background Art

[0002] The structure of existing washing machines generally includes an inner barrel and an outer barrel. The inner barrel and the outer barrel are connected, and a dehydration hole is provided on the inner barrel for dehydration, and the outer barrel is closed as a water storage barrel. In this way, when the washing machine is working, the area between the inner barrel and the outer barrel is full of water. During the long-term use and operation of the washing machine, the area between the inner barrel and the outer barrel will be covered with dirt and thread scraps in the water. After years of use, bacteria and odor will be generated, which will have a great impact on the washing effect and user experience.

[0003] In order to solve the problem of contamination of the inner and outer barrels caused by water filling the space between the inner and outer barrels, a new type of washing machine is available that can seal the inner and outer barrels to prevent the contamination problem. A known solution is to design the inner barrel as a hole-free inner barrel, so that the inner and outer barrels are isolated, and the inner barrel acts as a water storage barrel. At the same time, in order to drain the inner barrel, an external sealing structure is placed on the drainage hole of the inner barrel to achieve the sealing of the inner barrel. In this case, the inner barrel and the outer barrel cannot rotate relative to each other; when the load in the inner barrel shakes due to the rotation of the laundry, the sealing structure also has the hidden danger of shaking, which may cause water leakage.

[0004] In addition, with the improvement of living standards, users have higher and higher requirements for the washing effect of clothes. Existing washing machines basically use the impeller to rotate and stir the water flow to wash clothes during the washing or rinsing process. The water flow formed by this washing method is relatively single, and the washing effect needs to be improved. There is a dual-power washing machine that can control the impeller and the inner drum to rotate in the opposite direction during washing and rinsing to give the water flow more power, increase the water flow mode, enhance the water flow effect, and have a better washing effect.

[0005] In summary, the present invention aims to provide a washing machine that can achieve waterless operation between barrels and at the same time has the washing method of a dual-power washing machine, thereby meeting the user's dual requirements for the cleanliness of clothes and the cleanliness of the washing machine. Summary of the invention

[0006] In order to solve the above problems, the first invention object of the present invention is to provide a drainage sealing device for a washing machine. Specifically, the following technical solutions are adopted:

[0007] A drainage sealing device for a washing machine, the washing machine comprises an inner barrel, a drainage hole is provided at the bottom of the inner barrel, the drainage sealing device is installed at the bottom of the inner barrel, and comprises a sealing mechanism that can be sealed with the drainage hole:

[0008] During washing or rinsing, the sealing mechanism seals with the drain hole, and the inner barrel contains washing water; during drainage, the sealing mechanism opens the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

[0009] Furthermore, the sealing mechanism includes a blocking component, a connecting component and a fixing component. The fixing component is fixedly installed at the bottom of the inner barrel, and the connecting component is relatively slidably installed on the fixing component. The connecting component is simultaneously connected to the blocking component to drive the blocking component to move, thereby realizing the sealing and separation of the blocking component and the drain hole.

[0010] Furthermore, the fixing component has a hollow slide, one end of the connecting component is slidably arranged in the hollow slide of the fixing component, and the other end extends out to be connected with the blocking component; the connecting component slides back and forth axially in the hollow slide, driving the blocking component to seal and separate from the drainage hole.

[0011] Furthermore, the sealing mechanism includes an elastic component, one end of which is connected to the fixing component, and the other end is connected to the blocking component or the connecting component, and the elastic component is deformed when the connecting member slides to a state where the blocking component is separated from the drain hole, thereby realizing elastic resetting and sealing of the blocking component;

[0012] Preferably, the elastic component is initially in a compressed state to maintain a sealed fit between the blocking component and the drainage hole.

[0013] Furthermore, the elastic component is a tension spring, the connecting component is a tension spring sleeve with a hollow interior, the fixing component includes a threaded sleeve with a hollow interior, the tension spring sleeve is slidably sleeved in the threaded sleeve, the tension spring sleeve is arranged in the tension spring sleeve, one end of the tension spring is connected to the threaded sleeve, and the other end is connected to the tension spring sleeve or the blocking component.

[0014] Furthermore, one end of the tension spring has a first connection portion extending outward in the circumferential direction, and the other end has a second connection portion; a clamping groove for limiting clamping with the first connection portion of the tension spring is provided on the outer wall of the threaded sleeve, and an avoidance through groove for avoiding the first connection portion when the tension spring tube slides is provided at a position corresponding to the clamping groove, and the other end of the tension spring tube has a limiting convex ring, and the second connection portion of the tension spring extends between the limiting convex ring and the blocking component and is clamped and fixed;

[0015] Preferably, the height of the portion of the tension spring tube that is not provided with the avoidance through groove is X, the height of the entire threaded sleeve is Y, and X is smaller than Y.

[0016] Furthermore, the fixing component includes a tightening sleeve, and the tightening sleeve is threadedly connected to the threaded sleeve, and the tension spring is driven to move through the threaded tightening connection between the tightening sleeve and the threaded sleeve to adjust the pre-tightening force applied by the tension spring to the blocking component, so as to perform self-sealing of the blocking component;

[0017] Preferably, the fixing component further comprises a support plate, the support plate is fixedly mounted on the bottom of the inner barrel, and the fastening sleeve is fixedly mounted on the support plate.

[0018] Furthermore, the blocking component comprises a top cover, the upper end surface of the top cover is an arc surface, and the lower end surface of the top cover has a sealing portion that seals with the drain hole; one end of the connecting component is fixedly connected to the center position of the lower end surface of the top cover;

[0019] Preferably, the blocking component further comprises a sealing gasket, and the sealing gasket is arranged on the lower end surface of the top cover.

[0020] Furthermore, the sealing mechanism comprises a sealing component, both ends of which are sealingly mounted between the blocking component and the fixing component to form a sealed space, and the connecting component is arranged in the sealed space;

[0021] Preferably, the sealing component is a sealing threaded sleeve, one end of which is sealed to the top cover, and the other end is sealed to an end of the fastening sleeve close to the top cover, forming a sealed space that completely covers the tension spring sleeve and the tension spring.

[0022] Furthermore, the washing machine includes a water collecting device arranged outside the inner drum, and the drainage sealing device also includes a driving mechanism, the driving mechanism is installed on the water collecting device corresponding to the sealing mechanism, and the driving mechanism has an output end that can be extended up and down:

[0023] During washing or rinsing, the output end of the driving device retracts, the sealing mechanism cooperates with the drainage hole in a sealing manner, and the washing water is contained in the inner barrel; during drainage, the output end of the driving device extends to push the sealing mechanism open and separate it from the drainage hole, the drainage hole opens, and the washing water in the inner barrel flows out of the drainage hole to the water collecting device for discharge.

[0024] The second invention objective of the present invention is to provide a washing machine, specifically, adopting the following technical solution:

[0025] A washing machine comprises an inner drum, a drainage hole is provided at the bottom of the inner drum, a drainage sealing device is installed at the bottom of the inner drum, and the sealing mechanism can be sealed with the drainage hole:

[0026] During washing or rinsing, the sealing mechanism seals with the drain hole, and the inner barrel contains washing water; during drainage, the sealing mechanism opens the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

[0027] The drainage sealing device of the present invention is designed based on the structure of the inner barrel itself. The sealing mechanism can make the inner barrel self-sealed. When the washing machine is working, no water will accumulate between the inner barrel and the outer barrel to prevent contamination. It is also an application of water-saving technology for users. In addition, after the inner barrel is self-sealed by the sealing mechanism, the inner barrel and the impeller can rotate relative to each other to realize the function of dual-power washing clothes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of the sealing mechanism of the drainage sealing device according to an embodiment of the present invention;

[0029] Figure 2 Schematic diagram of the assembly of the drainage sealing device of the embodiment of the present invention installed on the washing machine (drain hole closed state);

[0030] Figure 3 Schematic diagram of the assembly of the drainage sealing device according to the embodiment of the present invention installed on the washing machine (drain hole open state). DETAILED DESCRIPTION

[0031] The following is a detailed description of a drainage sealing device for a washing machine and a washing machine according to the present invention in conjunction with the accompanying drawings:

[0032] like Figure 1-Figure 3 As shown, a drainage sealing device of a washing machine, the washing machine includes an inner barrel 700, a drainage hole is provided at the bottom of the inner barrel 700, and the drainage sealing device is installed at the bottom of the inner barrel 700, including a sealing mechanism that can be sealed with the drainage hole:

[0033] During washing or rinsing, the sealing mechanism seals with the drain hole, and the inner barrel contains washing water; during drainage, the sealing mechanism opens the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

[0034] The drainage sealing device of this embodiment is designed based on the structure of the inner barrel itself. The sealing mechanism can make the inner barrel self-sealed. When the washing machine is working, no water will accumulate between the inner barrel and the outer barrel to prevent contamination. It is also an application of water-saving technology for users. In addition, after the inner barrel is self-sealed through the sealing mechanism, the inner barrel and the impeller can rotate relative to each other to realize the function of dual-power washing clothes.

[0035] Therefore, the sealing mechanism of this embodiment cannot interfere with the operation of the inner barrel when sealing the drain hole. As an implementation method of this embodiment, the sealing mechanism includes a sealing component, a connecting component and a fixing component. The fixing component is fixedly installed on the bottom of the inner barrel, and the connecting component is relatively slidably installed on the fixing component. The connecting component is connected to the sealing component at the same time to drive the sealing component to move, thereby realizing the sealing and separation of the sealing component and the drain hole.

[0036] The original state of the sealing member of the sealing mechanism of this embodiment is to close the drainage hole, thereby realizing self-sealing of the drainage hole of the inner barrel. During drainage, an external driving mechanism acts on the connecting component to drive it to move, and the connecting component drives the sealing component to move, thereby realizing separation of the sealing component from the drainage hole to open the drainage hole.

[0037] Furthermore, the fixing component described in this embodiment has a hollow slide, one end of the connecting component is slidably arranged in the hollow slide of the fixing component, and the other end extends out to be connected to the blocking component; the connecting component slides back and forth axially in the hollow slide, driving the blocking component to seal and separate from the drainage hole.

[0038] In order to achieve self-sealing of the drainage hole by the sealing mechanism, the sealing mechanism described in this embodiment includes an elastic component, one end of the elastic component is connected to the fixing component, and the other end is connected to the blocking component or the connecting component. The elastic component is deformed when the connecting part slides to a state where the blocking component is separated from the drainage hole, thereby achieving elastic reset sealing of the blocking component.

[0039] Preferably, the elastic component is initially in a compressed state to maintain a sealed fit between the blocking component and the drainage hole.

[0040] As an implementation mode of this embodiment, the elastic component is a tension spring 300, the connecting component is an internally hollow tension spring sleeve 200, the fixing component includes an internally hollow threaded sleeve 400, the tension spring sleeve 200 is slidably sleeved in the threaded sleeve 400, the tension spring 300 is sleeved in the tension spring sleeve, one end of the tension spring 300 is connected to the threaded sleeve 400, and the other end is connected to the tension spring sleeve 200 or the blocking component.

[0041] Specifically, Figure 3 As shown, one end of the tension spring 300 has a first connecting portion 302 extending circumferentially, and the other end has a second connecting portion 301; a clamping groove 401 for limiting and clamping with the first connecting portion 302 of the tension spring 300 is provided on the outer wall of the threaded sleeve 400, and an avoidance through groove 202 for avoiding the first connecting portion 302 when it slides is provided at one end of the tension spring tube 200 corresponding to the clamping groove 401, and the other end of the tension spring tube 200 has a limiting convex ring 201, and the second connecting portion 301 of the tension spring 300 extends between the limiting convex ring 201 and the blocking component and is clamped and fixed.

[0042] Preferably, the height of the portion of the spring tube 200 that is not provided with the avoidance groove is X, the height of the threaded sleeve as a whole is Y, and X is smaller than Y. In this way, the spring tube 200 will not be hindered by the internal spring when sliding up and down, thereby ensuring the effectiveness and stability of the opening and closing of the drainage hole.

[0043] Furthermore, the fixing component described in this embodiment includes a fastening sleeve 600, which is threadedly connected to the threaded sleeve 400. The threaded fastening connection between the fastening sleeve 600 and the threaded sleeve 400 drives the tension spring 300 to move, so as to adjust the pre-tightening force applied by the tension spring 300 to the sealing component, thereby performing self-sealing of the sealing component.

[0044] Preferably, the fixing component further comprises a support plate 500 , the support plate 500 is fixedly mounted on the bottom of the inner barrel 700 , and the fastening sleeve 600 is fixedly mounted on the support plate 500 .

[0045] Specifically, the support plate 500 has a connection hole 501 fixedly connected to the bottom of the inner barrel and a fixing hole 502 for fixing and installing the fastening sleeve 600.

[0046] Further preferably, the fixing hole 502 is located between two / groups of connecting holes 501 .

[0047] As an implementation mode of this embodiment, the blocking component described in this embodiment includes a top cover 100, the upper end surface of the top cover 100 is an arc surface, and the lower end surface of the top cover 100 has a sealing portion 101 that seals with the drainage hole; one end of the connecting component is fixedly connected to the center position of the lower end surface of the top cover 100.

[0048] Preferably, the blocking component further includes a sealing gasket 800, and the sealing gasket 800 is arranged on the lower end surface of the top cover.

[0049] The assembly relationship between the various parts of the sealing mechanism of this embodiment is shown in FIG. Figure 3 First, install the tension spring sleeve 200 and the threaded sleeve 400 together, and align the snap-in groove 401 with the avoidance groove 202. The radial groove of the avoidance groove 202 is open, and the snap-in groove 401 is half the wall thickness of the radial groove of the threaded sleeve. After the tension spring sleeve 200 opens the avoidance groove 202 axially, the remaining dimension shown in the figure X should be lower than the height shown in the figure Y of the threaded sleeve 400.

[0050] When the tension spring 300 is installed in the tension spring sleeve 200, the end of the tension spring 300 that comes out hooks the clamping groove 401 of the threaded sleeve 400, but does not hook the tension spring sleeve 200. The other end of the tension spring 300 is tightened by the conical structure of the tension spring sleeve 200 and the top cover 100 to press the tension spring 300. In this way, the threaded sleeve 400 and the tension spring sleeve 200 are fixed together through the two ends of the tension spring 300. Then, it is screwed together with the top cover 100 with the sealing gasket 800 to form a module (including 100, 200, 400, 600). On the other side, the support plate 500 is fastened to the flange 900 by screws, and the fastening sleeve 600 is used to connect with the threaded sleeve 400 through the thread, so that the threaded sleeve 400 drives the tension spring 300 to move outward, and the tension spring 300 drives the top cover 100 to move. The more it is twisted, the greater the tension is, and the module is tightly pulled between the support plate 500 and the inner barrel 700.

[0051] Working principle of the seal: one end of the tension spring 300 is fixed by the bell-mouth structure of the tension spring sleeve 200 and the top cover 100, and the other end is stuck on the threaded sleeve 400. When the fastening sleeve 600 and the threaded sleeve 400 are tightened together, the threaded sleeve 400 drives the tension spring 300 to move downward, tightening the tension spring 300 to generate tension, thereby driving the top cover 100 to press the sealing gasket 800 to achieve the initial state of self-sealing. At this time, the whole machine can be put into clothes, water can be added, and then washing can begin. And the inner barrel can rotate freely. There will be no water leakage. Figure 2 shown.

[0052] Working principle of drainage: When preparing to drain water, the inner barrel uses a positioning structure to achieve the overlap of the sealing structure and the driving mechanism 1000. At this time, the output end of the driving mechanism 1000 hits the cylinder 102 of the top cover 100, driving the top cover 100 to move up, and a gap is generated between the top cover 100 and the bottom of the barrel to achieve drainage. At this time, the tension spring 300 is also stretched to the maximum stroke. After the drainage is completed, the output end 1001 of the driving mechanism 1000 retracts, and the top cover 100 reseals the drainage hole under the action of the tension spring 300. Figure 3 shown.

[0053] The drainage sealing device of this embodiment is designed with a conical design for the inner barrel and the sealing pad, so that when clothes gather near the drainage outlet, the foreign matter can be discharged more easily under the impact of the water flow and the gravity of the foreign matter itself. It is also helpful to prevent the accumulation of lint during long-term operation.

[0054] In this embodiment, the top cover 100 is made into an umbrella-shaped structure, which effectively utilizes the space between the impeller and the bottom of the inner tub, and optimizes the defect of insufficient space between the inner tub and the outer tub. It ensures that the sealing mechanism of the whole machine can be lifted up to the maximum. The height of the opening reaches 12mm. It can effectively discharge buttons, hairpins, coins, thread scraps and other washing foreign objects into the tub.

[0055] During drainage, the washing water flowing out through the drainage hole may enter the fastening sleeve 600. As time goes by, if the lint, dirt or debris in the washing water enters, it may affect the internal components of the fastening sleeve 600, such as the tension spring 200, causing it to malfunction, thereby affecting the normal resetting and sealing effect of the sealing component. Therefore, in order to ensure the relative stability of the working environment of the internal components of the fastening sleeve 600, the sealing mechanism described in this embodiment includes a sealing component, and both ends of the sealing component are sealed and installed between the sealing component and the fixed component to form a sealed space, and the connecting component is arranged in the sealed space.

[0056] Preferably, the sealing component is a sealing threaded sleeve 1200, one end of which is sealed to the top cover, and the other end is sealed to the end of the fastening sleeve close to the top cover, forming a sealed space that completely covers the tension spring sleeve 200 and the tension spring 300. The sealing threaded sleeve 1200 has a sealing effect, and can be extended and retracted with the up and down movement of the top cover, has a simple structure, and is low in cost, and ensures the sealing of the working environment of the tension spring 300.

[0057] As an implementation of this embodiment, the washing machine includes a water collecting device 1100 arranged outside the inner drum, and the drainage sealing device also includes a driving mechanism 1000, which is installed on the water collecting device corresponding to the sealing mechanism, and the driving mechanism has an output end 1001 that can be extended up and down:

[0058] During washing or rinsing, the output end of the driving device retracts, the sealing mechanism cooperates with the drainage hole in a sealing manner, and the washing water is contained in the inner barrel; during drainage, the output end of the driving device extends to push the sealing mechanism open and separate it from the drainage hole, the drainage hole opens, and the washing water in the inner barrel flows out of the drainage hole to the water collecting device for discharge.

[0059] Preferably, the driving mechanism may be a drain valve structure.

[0060] The water collecting device 1000 of this embodiment is mainly used to collect and discharge the drainage of the inner barrel 700, and also collect and discharge the water that escapes from the inner barrel 700. Therefore, the water collecting device 1000 can be an outer barrel or a basin structure with a water collecting chamber, which can increase the volume of the inner barrel in the same shell at the same time, thereby having a capacity expansion effect.

[0061] The output end 1001 of the driving device of this embodiment is a telescopic rod, which can be inserted into the fastening sleeve 600 to lift up the top cover 100.

[0062] This embodiment also provides a washing machine, including an inner drum, a drainage hole is provided at the bottom of the inner drum, and a drainage sealing device is installed at the bottom of the inner drum, including a sealing mechanism that can be sealed with the drainage hole:

[0063] During washing or rinsing, the sealing mechanism seals with the drain hole, and the inner barrel contains washing water; during drainage, the sealing mechanism opens the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

[0064] The washing machine of this embodiment can achieve water-free space between barrels, solving the problem that the area between the inner barrel and the outer barrel is easily contaminated. In addition, the washing machine of this embodiment can achieve dual-power washing, improve the washing effect, and meet the washing requirements of users.

[0065] The inner barrel of the present embodiment is a hole-free inner barrel. Except for a circle of dehydration holes arranged on the upper part of the barrel wall of the inner barrel of the present embodiment, the rest are closed. Preferably, the dehydration holes are arranged at the inner barrel mouth. After the balance ring is installed on the inner barrel mouth, the balance ring can hide the dehydration holes, thereby realizing a hole-free inner barrel structure in appearance.

[0066] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A drainage sealing device for a washing machine, characterized in that: Installed at the bottom of the inner barrel of the washing machine, it includes a sealing mechanism that can be sealed with the drainage hole opened at the bottom of the inner barrel: The sealing mechanism comprises a sealing component, a tension spring sleeve with a hollow interior, a tension spring and a fixing component fixedly installed at the bottom of the inner barrel; The fixing component includes a threaded sleeve with a hollow interior, the tension spring sleeve is slidably arranged in the threaded sleeve, the tension spring is arranged in the tension spring sleeve, one end of the tension spring is connected to the threaded sleeve, and the other end is connected to the tension spring sleeve or the blocking component; the tension spring sleeve is connected to the blocking component to drive the blocking component to move, thereby realizing the sealing and separation of the blocking component and the drainage hole; A water collecting device is arranged outside the inner barrel, and the water collecting device is an outer barrel or has a water collecting chamber in a basin-shaped structure; During washing or rinsing, the blocking component moves and seals with the drain hole to block the drain hole, and the inner barrel is filled with washing water; during drainage, the blocking component moves and separates from the drain hole to open the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

2. A drainage sealing device for a washing machine according to claim 1, characterized in that: The tension spring is deformed when the tension spring sleeve slides to a state where the blocking component is separated from the drain hole, thereby realizing elastic resetting and sealing of the blocking component.

3. A drainage sealing device for a washing machine according to claim 1, characterized in that: The initial state of the tension spring is in a compressed state to maintain the sealing fit between the blocking component and the drainage hole.

4. A drainage sealing device for a washing machine according to claim 1, characterized in that: One end of the tension spring has a first connecting portion extending in the circumferential direction, and the other end has a second connecting portion; a clamping groove for limiting and clamping with the first connecting portion of the tension spring is provided on the outer wall of the threaded sleeve, and an avoidance groove for avoiding the first connecting portion when the tension spring sleeve slides is provided at a position corresponding to the clamping groove at one end of the tension spring sleeve, and a limiting convex ring is provided at the other end of the tension spring sleeve, and the second connecting portion of the tension spring extends between the limiting convex ring and the sealing component and is clamped and fixed.

5. A drainage sealing device for a washing machine according to claim 4, characterized in that: The height of the portion of the tension spring sleeve that is not provided with the avoidance through groove is X, and the height of the entire threaded sleeve is Y, and X is smaller than Y.

6. A drainage sealing device for a washing machine according to any one of claims 1 to 5, characterized in that: The fixing component comprises a tightening sleeve, which is threadedly connected to the threaded sleeve. The threaded tightening connection between the tightening sleeve and the threaded sleeve drives the tension spring to move to adjust the pre-tightening force applied by the tension spring to the sealing component, so as to achieve self-sealing of the sealing component.

7. A drainage sealing device for a washing machine according to claim 6, characterized in that: The fixing component also includes a support plate, the support plate is fixedly mounted on the bottom of the inner barrel, and the fastening sleeve is fixedly mounted on the support plate.

8. A drainage sealing device for a washing machine according to any one of claims 1 to 5, characterized in that: The blocking component comprises a top cover, the upper end surface of the top cover is an arc surface, and the lower end surface of the top cover has a sealing portion that seals with the drainage hole; one end of the tension spring sleeve is fixedly connected to the center position of the lower end surface of the top cover.

9. A drainage sealing device for a washing machine according to claim 8, characterized in that: The blocking component also includes a sealing gasket, which is arranged on the lower end surface of the top cover.

10. A drainage sealing device for a washing machine according to any one of claims 1 to 5, characterized in that: The sealing mechanism comprises a sealing component, both ends of which are sealingly installed between the blocking component and the fixing component to form a sealed space, and the tension spring sleeve is arranged in the sealed space.

11. A drainage sealing device for a washing machine according to claim 10, characterized in that: The sealing component is a sealing threaded sleeve, one end of which is sealed to the top cover, and the other end is sealed to an end of the fastening sleeve close to the top cover, forming a sealed space that completely covers the tension spring sleeve and the tension spring.

12. A drainage sealing device for a washing machine according to any one of claims 1 to 5, characterized in that: The drainage sealing device also includes a driving mechanism, which is installed on the water collecting device corresponding to the sealing mechanism, and has an output end that can be extended up and down: During washing or rinsing, the output end of the driving device retracts, the sealing mechanism and the drain hole are sealed together, and the washing water is contained in the inner barrel; during drainage, the output end of the driving device extends to push the sealing mechanism open and separate it from the drain hole, the drain hole opens, and the washing water in the inner barrel flows out of the drain hole into the water collecting device for discharge.

13. A washing machine, characterized in that: It comprises an inner barrel, a drainage hole is provided at the bottom of the inner barrel, and a drainage sealing device as claimed in any one of claims 1 to 5 is installed at the bottom of the inner barrel: During washing or rinsing, the sealing mechanism seals with the drain hole, and the inner barrel contains washing water; during drainage, the sealing mechanism opens the drain hole, and the washing water in the inner barrel is discharged from the drain hole.

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