Sealing cover device for washing machine and washing machine

Abstract

According to the sealing cover device for the washing machine, a main body comprises an upper cover and a bottom cover which are buckled with each other, a water inlet cavity is formed between the upper cover and the bottom cover, a water inlet is formed in the lowest position of the bottom cover to input water for washing, and internal water accumulation can be effectively avoided through the structure that an arc-shaped part is matched with the lowest-point water inlet; a water inlet is closed when inflow water is not input, a one-way valve mechanism is arranged on the periphery of the water inlet, and when water comes from the outside, the one-way valve mechanism can be opened under the pushing action of water flow due to the fact that the water flow is folded towards the water inlet below, and the water flow can enter the water inlet through the valve mechanism; due to the structural design of the one-way valve mechanism, the one-way valve mechanism is closed again under the action of gravity, after the one-way valve mechanism is closed, even if upward steam exists in the washing drum, the steam cannot pass through the water inlet area closed by the valve, and the situation that the steam in the washing drum overflows outwards through the water inlet to damage electrical elements is effectively avoided. The utility model further provides a washing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machine household appliances. Specifically, it relates to a sealing cover device for a washing machine and also to a washing machine. Background Art

[0002] Existing washing machines usually have an inner tub and an outer tub. During washing, water is distributed in the inner tub and the outer tub, and several dehydration holes are provided on the peripheral wall of the inner tub. For example, in the pulsator washing machine and the tub lid of the pulsator washing machine with the patent publication number CN105297324A, the water consumption is large during washing, resulting in waste of water resources. Moreover, because there is water distributed between the inner tub and the outer tub, the amount of detergent used is also large, causing waste of detergent resources and being unfavorable for cost saving. In addition, dirt in the washing machine is easily retained between the inner tub and the outer tub, thus breeding bacteria, and users need to frequently disassemble and clean it, which is very inconvenient to use.

[0003] To solve the above technical problems, a pollution-free washing machine has been introduced on the market. For example, the washing machine with the patent publication number CN208121412U adopts a single-tub structure, that is, only a rotating tub is provided without a water storage tub. In this way, water is in the rotating tub during washing, which is more water-saving. A water guide cover is provided on the inner peripheral wall surface of the rotating tub, an inlet is provided on the water guide cover, and outlets are provided on the peripheral wall and / or the bottom wall of the rotating tub. During dehydration, the water in the rotating tub rises under the action of centrifugal force and enters the water guide cover through the inlet, and flows to the outlet under the guidance of the water guide cover, and thus is discharged to the water receiving tray through the outlet. Therefore, in the case of canceling the water storage tub to simplify the structure, increase the capacity, reduce dirt and bacteria breeding, and save water, the dehydration effect can be improved at the same time.

[0004] However, for the washing machines or pollution-free washing machines on the current market, only an outer cover is provided on the outer box body outside the rotating tub. When the washing machine realizes functions such as drying and boiling washing, the hot air will rise to the outer cover of the outer box body, which will damage the controller provided on the outer box body and affect the service life of the controller. Moreover, during dehydration, water may splash outside the rotating tub. Although some existing washing machines will provide an inner cover at the opening at the upper end of the rotating tub, the existing inner cover has a structure with a normally open water inlet hole due to the need to perform the function of water inlet input, and the sealing performance is insufficient. During drying and boiling washing, water vapor is still likely to be discharged outside the tub through the water inlet hole, which will still affect the electrical structure on the outer box body.

[0005] In summary, the existing washing machines have technical problems of insufficient sealing performance and easy external discharge of water vapor, which may damage electrical components. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is that the existing washing machines have technical problems of insufficient sealing performance and easy external discharge of water vapor, which may damage electrical components.

[0007] To solve the above problems, the present utility model provides a sealing cover device for a washing machine, which includes a bottom cover and an upper cover that are buckled and docked with each other. The edge of the bottom cover is used to dock with the top edge of the washing cylinder of the washing machine to seal the washing cylinder. The upper cover is buckled on the upper end of the bottom cover, and a water inlet cavity is formed between the two. The bottom cover includes an arc-shaped portion that slopes downward from the periphery to the center. The lowest position of the arc-shaped portion is provided with a water inlet, and water in the water inlet cavity is output into the washing cylinder through the water inlet. The upper cover is provided with a plurality of water injection holes, and the water injection holes are used to communicate with the water injection mechanism of the washing machine to input water into the water inlet cavity through the water injection holes. A one-way valve mechanism is provided between the outer periphery of the water inlet and between the bottom cover and the upper cover. The one-way valve mechanism is used to open under the push of the incoming water flow, and communicate the area where the water inlet is located with the water inlet cavity. When there is no incoming water flow, the one-way valve closes under the action of gravity, isolating the water inlet from the water inlet cavity.

[0008] The present utility model provides a sealing cover device that can effectively prevent water vapor from overflowing. It is buckled with the top end of the washing cylinder to seal the washing cylinder. Its main body includes two parts that are buckled with each other, namely the upper cover and the bottom cover. There is a water inlet cavity for water inlet between the two. The lowest position of the bottom cover at the bottom is provided with a water inlet to input washing water into the washing cylinder below. The structure of the arc-shaped portion cooperating with the lowest point water inlet can effectively avoid internal water accumulation. To close the water inlet when no water is input, a one-way valve mechanism is provided on the outer periphery of the water inlet. When there is incoming water from the outside, the water flow converges downward to the water inlet, and the one-way valve mechanism opens under the pushing action of the water flow, allowing the water flow to enter the water inlet through the valve mechanism. When there is no water flow, due to its own structural design, the one-way valve mechanism closes again under the action of gravity, isolating the space where the water inlet is located from the external water inlet cavity. After the one-way valve mechanism closes, even if there is upward steam inside the washing cylinder, it cannot pass through the area of the water inlet closed by the valve, effectively preventing the steam in the washing cylinder from overflowing to the outside through the water inlet, ensuring the sealing performance inside the washing cylinder and effectively protecting the external electrical components.

[0009] As a preferred solution, the one-way valve mechanism includes a spacer plate that is integrally and fixedly connected to the bottom cover at the outer edge of the water inlet and is distributed in a ring shape. A plurality of window structures are evenly distributed on the side wall of the spacer plate at a preset distance. Each window structure is provided with a rotatable one-way valve plate on the side adjacent to the water inlet. The one-way valve plate is used to rotate and open towards the water inlet side under the push of the water flow, and fall back to close the window structure under the action of gravity when there is no water flow.

[0010] This design optimizes the structural design of the one-way valve mechanism, which includes a fixed spacer structure and a movable one-way valve plate. The spacer has a window structure that mates with the one-way valve plate. The one-way valve plate is rotatable and can only rotate on the side facing the water inlet. In this way, it can be pushed open by the water flow when water enters, and will fall back under gravity when there is no water flow, ensuring the working effect.

[0011] As a preferred solution, the one-way valve mechanism further includes a top buckle plate. The top buckle plate is buckled with the top edge of the spacer to close the top of the window structure. The one-way valve plate is rotatably connected to the lower edge of the top buckle plate through a rotating shaft. The outer edge of the top buckle plate is fixedly connected to the outer edge of the spacer through a threaded connector. This design further optimizes the structural design of the one-way valve mechanism. To ensure the overall tightness of the structure and prevent water flow or steam from overflowing above the structure, a top buckle plate is provided to enclose the upper space of the spacer, and the tightness of the closure of the top buckle plate is ensured through threaded connection.

[0012] As a preferred solution, the top buckle plate is provided with a protruding limiting ejector rod on the side where the one-way valve plate faces the water inlet. The maximum rotation angle of the one-way valve plate is restricted by the limiting ejector rod to prevent the valve plate from getting stuck due to excessive opening. This design makes an adaptive supplementary optimization for the rotatable one-way valve plate structure. A limiting ejector rod corresponding to the window structure is provided on the side of the top buckle plate at the water inlet. When the one-way valve plate rotates towards the water inlet side to a preset angle, it can be blocked by the limiting ejector rod, preventing it from rotating too much and avoiding the possible jamming of the valve plate rotation.

[0013] As a preferred solution, the bottom cover is provided with a plurality of upwardly protruding flow guiding grid structures that are radially distributed around the water inlet. A groove-like structure is formed between adjacent flow guiding grid structures to guide the water flow. This design optimizes the surface structure design of the bottom cover. The radially distributed flow guiding grid structures can guide the injected water flow to converge towards the water inlet direction, reducing the eddy current in the water inlet cavity and making the water flow down more smoothly.

[0014] As a preferred solution, the upper cover is provided with an arc-shaped convex portion that is convex in an arc shape along the direction from the periphery to the center. The upper cover is provided with a plurality of downwardly concave flow guiding grid structures that are radially distributed from its center to the periphery. The water injection holes are arranged in the flow guiding grid structures; the water injection holes are also evenly distributed at the low points of the arc at the edge of the upper cover. Referring to the flow guiding grid design on the bottom cover above, corresponding structural optimization is also carried out on the upper cover. It has an overall arc-shaped structure that is high in the middle and low around, and is provided with radially distributed flow guiding grids, reducing the water inlet eddy current, being able to avoid water splashing, and making the water injection smoother.

[0015] As a preferred solution, a water retaining ring structure is integrally connected to the outer edge of the upper cover and stands upright on its plate surface structure for blocking the injected water flow on the upper surface of the upper cover and guiding it into the water injection hole. This design further optimizes the structural design of the upper cover. By setting up a standing water retaining ring at its outer edge, the area through which the water injection can flow is restricted, preventing the water injection from overflowing and improving the cleanliness of the washing machine during use.

[0016] As a preferred solution, it further includes an upper pull ring. The upper pull ring has an annular structure and includes an integrally connected water inlet ring and an arc-shaped extension ring. The water inlet ring is buckled on the bent outer edge of the bottom cover, and a plurality of outer edge water holes are evenly distributed thereon. The outer edge water holes are used to communicate with the water injection mechanism of the washing machine for introducing the water injection into the water inlet cavity; the bottom surface of the extension ring abuts against the upper end surface of the water retaining ring structure, and the extended edge is spaced at a preset height above the upper cover, facilitating hand-held operation.

[0017] This design further optimizes the overall structural design of the sealing cover. By adding an upper pull ring above the upper cover, which is buckled on the upper cover and has its edge protruding outside the water retaining ring structure, it is convenient for the operator to hand-hold and install or remove the entire sealing cover. And it has a water inlet ring on the outer circle, which communicates with the water inlet cavity. In addition to the water injection hole on the upper cover mentioned above, a structure for injecting water from the outer edge of the sealing cover into the water inlet cavity is added, which can recover the overflowing water when the water injection flow rate is too large and overflows the water retaining ring structure of the above-mentioned upper cover.

[0018] As a preferred solution, a plurality of protruding buckles are evenly distributed on the outer side edge of the bottom cover at a preset distance for buckling and connecting with the top edge of the laundry tub of the washing machine. This structure optimizes the joint structure between the entire sealing cover device and the laundry tub. By designing protruding buckles on the outer side of the bottom cover and setting corresponding matching structures on the top edge of the laundry tub, the clamping connection between the two can be completed. When it is necessary to remove the sealing cover, just hand-hold and pull the upper pull ring.

[0019] The present utility model also provides a washing machine, which includes a machine shell and a laundry tub located therein, and also includes the sealing cover device in any one of the above. Since the above-mentioned sealing cover device has the above-mentioned beneficial effects, the washing machine with this sealing cover device should also have corresponding beneficial effects. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall upper structure of a sealing cover device for a washing machine provided by the present utility model;

[0021] Figure 2 It is Figure 1 a schematic diagram of the overall lower structure of the sealing cover device for a washing machine in

[0022] Figure 3 It is Figure 1Side sectional structure schematic diagram of the sealing cover device for a washing machine at the installation position;

[0023] Figure 4 is Figure 1 Schematic diagram of the structure of the upper cover in the sealing cover device for a washing machine;

[0024] Figure 5 is Figure 1 Schematic diagram of the structure of the bottom cover in the sealing cover device for a washing machine.

[0025] Wherein, Figures 1-5 in:

[0026] 1. Bottom cover; 1-1. Water inlet; 1-2. Spacer; 1-3. Buckle; 1-4. Window structure; 2. Upper cover; 2-1. Water injection hole; 2-2. Water retaining ring structure; 3. Upper pull ring; 3-1. Extension ring; 3-2. Water inlet ring; 3-3. Outer edge water hole; 4. Check valve plate; 5. Flow guiding grid structure. Specific embodiments

[0027] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] Before making a detailed description of the working principle of the present utility model, further explanatory notes on the description of the present utility model are required: In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Refer to Figures 1-5 the following embodiments for description, Figure 1Schematic diagram of the overall upper structure of a sealing cover device for a washing machine provided by the present utility model; Figure 2 is Figure 1 Schematic diagram of the overall lower structure of the sealing cover device for a washing machine in [reference]; Figure 3 is Figure 1 Schematic diagram of the side sectional structure of the sealing cover device for a washing machine at the installation position; Figure 4 is Figure 1 Schematic diagram of the structure of the upper cover in the sealing cover device for a washing machine; Figure 5 is Figure 1 Schematic diagram of the structure of the bottom cover in the sealing cover device for a washing machine.

[0031] In the sealing cover device for a washing machine provided in this embodiment, it includes a bottom cover 1 and an upper cover 2 that are buckled and docked with each other. The edge of the bottom cover 1 is used to dock with the top edge of the washing tub of the washing machine to seal the washing tub. The upper cover 2 is buckled on the upper end of the bottom cover 1, and a water inlet cavity is formed therebetween. The bottom cover 1 includes an arc-shaped portion that slopes downward from the periphery to the center. The lowest position of the center of the arc-shaped portion is provided with a water inlet 1-1, and the water in the water inlet cavity is output into the washing tub through the water inlet 1-1; the upper cover 2 is provided with a plurality of water injection holes 2-1, and the water injection holes 2-1 are used to communicate with the water injection mechanism of the washing machine to input water into the water inlet cavity through the water injection holes 2-1; a one-way valve mechanism is arranged between the outer periphery of the water inlet 1-1 and between the bottom cover 1 and the upper cover 2. The one-way valve mechanism is used to open under the push of the incoming water flow, connect the area where the water inlet 1-1 is located with the water inlet cavity, and the one-way valve closes under the action of gravity in the state without incoming water flow, isolating the water inlet 1-1 from the water inlet cavity.

[0032] The present utility model provides a sealing cover device that can effectively prevent water vapor from overflowing. It is buckled with the top end of the washing tub to seal the washing tub. Its main body includes two parts that are buckled with each other, namely the upper cover 2 and the bottom cover 1. There is a water inlet cavity for water inlet between them. The lowest position of the bottom cover 1 at the bottom is provided with a water inlet 1-1 to input washing water into the washing tub below. The structure of the arc-shaped portion cooperating with the lowest point water inlet 1-1 can effectively avoid internal water accumulation; in order to close the water inlet 1-1 when no water is input, a one-way valve mechanism is arranged on the outer periphery of the water inlet 1-1. When there is external incoming water, the mechanism can converge towards the lower water inlet 1-1 due to the water flow and open under the pushing action of the water flow, enabling the water flow to enter the water inlet 1-1 through the valve mechanism. When there is no water flow passing through, due to its own structural design, the one-way valve mechanism closes again under the action of gravity, isolating the space where the water inlet 1-1 is located from its external water inlet cavity. After the one-way valve mechanism closes, even if there is upward steam inside the washing tub, it cannot pass through the area of the water inlet 1-1 closed by the valve, effectively preventing the steam in the washing tub from overflowing to the outside through the water inlet 1-1, ensuring the sealing performance inside the washing tub and effectively protecting the external electrical components.

[0033] In the technical solution provided by this embodiment, the one-way valve mechanism includes a spacer plate 1-2 that is integrally and fixedly connected to the bottom cover 1 on the outer edge of the water inlet 1-1 and is distributed in a ring shape. A plurality of window structures 1-4 are evenly distributed on the side wall of the spacer plate 1-2 at a preset distance. Each window structure 1-4 is provided with a rotatable one-way valve plate 4 on the side adjacent to the water inlet 1-1. The one-way valve plate 4 is used to rotate and open towards the water inlet 1-1 under the push of water flow, and fall back to close the window structure 1-4 under the action of gravity when there is no water flow.

[0034] This design optimizes the structural design of the one-way valve mechanism, including the fixed spacer plate 1-2 structure and the movable one-way valve plate 4. The spacer plate 1-2 has a window structure 1-4 that cooperates with the one-way valve plate 4. The one-way valve plate 4 is rotatable and can only rotate on the side facing the water inlet 1-1. In this way, it can be pushed open by the water flow when water enters, and fall back under gravity when there is no water flow, ensuring the working effect.

[0035] In the technical solution provided by this embodiment, the one-way valve mechanism further includes a top buckle plate. The top buckle plate is buckled with the top edge of the spacer plate 1-2 to close the top of the window structure 1-4. The one-way valve plate 4 is rotatably connected to the lower edge of the top buckle plate through a rotating shaft. The outer edge of the top buckle plate is fixedly connected to the outer edge of the spacer plate 1-2 through a threaded connector. This design further optimizes the structural design of the one-way valve mechanism. To ensure the overall seal of the structure and prevent water flow or steam from overflowing above the structure, a top buckle plate is provided to close the upper space of the spacer plate 1-2, and the sealing performance of the top buckle plate's buckling and closing is ensured through a threaded connection.

[0036] In the technical solution provided by this embodiment, the top buckle plate is provided with a protruding limit top rod on the side of the one-way valve plate 4 facing the water inlet 1-1. The maximum rotation angle of the one-way valve plate 4 is restricted by the limit top rod to avoid jamming due to excessive valve plate opening. This design makes an adaptive supplementary optimization for the rotatable one-way valve plate 4 structure. A limit top rod corresponding to the window structure 1-4 is provided on the side of the top buckle plate facing the water inlet 1-1. When the one-way valve plate 4 rotates towards the water inlet 1-1 to a preset angle, it can be blocked by the limit top rod, avoiding excessive rotation angle and possible jamming of the valve plate rotation.

[0037] In the technical solution provided by this embodiment, the bottom cover 1 is provided with a plurality of upwardly protruding diversion grid structures 5 that are radially distributed around the water inlet 1-1. The space between adjacent diversion grid structures 5 forms a groove-like structure to guide the water flow. This design optimizes the surface structure design of the bottom cover 1. The radially distributed diversion grid structures 5 can guide the injected water flow to converge towards the water inlet 1-1 direction, reduce the eddy current in the water inlet cavity, and make the water flow more smooth.

[0038] In the technical solution provided in this embodiment, the upper cover 2 has an arc-shaped portion that bulges upward in an arc from the periphery to the center. The upper cover 2 is provided with a plurality of radially distributed and downwardly concave diversion grid structures 5 from its center to the periphery. Water injection holes 2-1 are provided in the diversion grid structures 5; the upper cover 2 is also evenly distributed with water injection holes 2-1 at the arc-shaped low points of its edge. Referring to the diversion grid design on the bottom cover 1 above, corresponding structural optimization is also carried out on the upper cover 2. It has an arc-shaped structure with a high middle and a low periphery, and is provided with radially distributed diversion grids, reducing the water inlet eddy current, being able to avoid water splashing, and making the water injection smoother.

[0039] In the technical solution provided in this embodiment, a water retaining ring structure 2-2 that stands upright on its plate surface structure is integrally connected to the outer edge of the upper cover 2, which is used to block the injected water flow on the upper surface of the upper cover 2 and guide it into the water injection holes 2-1. This design further optimizes the structural design of the upper cover 2. A standing water retaining ring is provided at its outer edge, restricting the area through which the water injection can flow, avoiding water injection overflow, and improving the cleanliness of the washing machine during use.

[0040] In the technical solution provided in this embodiment, it further includes an upper pull ring 3. The upper pull ring 3 has an annular structure and includes an integrally connected water inlet ring 3-2 and an arc-shaped extension ring 3-1. The water inlet ring 3-2 is buckled on the bent outer edge of the bottom cover 1, and a plurality of outer edge water holes 3-3 are evenly distributed thereon. The outer edge water holes 3-3 are used to communicate with the water injection mechanism of the washing machine for introducing the injected water into the water inlet cavity; the bottom surface of the extension ring 3-1 abuts against the upper end surface of the water retaining ring structure 2-2, and the extended edge is located above the upper cover 2 at a preset height, which is convenient for hand-held operation.

[0041] This design further optimizes the overall structural design of the sealing cover. An upper pull ring 3 is added above the upper cover 2. It is buckled on the upper cover 2, and the edge protrudes outside the water retaining ring structure 2-2, which is convenient for the operator to hand-held install or remove the entire sealing cover. And it has a water inlet ring 3-2 on the outer ring, which communicates with the water inlet cavity. In addition to the water injection holes 2-1 on the upper cover 2 mentioned above, a structure for injecting water from the outer edge of the sealing cover into the water inlet cavity is added, which can recover the overflowing water when the water injection flow rate is too large and overflows the water retaining ring structure 2-2 of the upper cover 2.

[0042] In the technical solution provided in this embodiment, a plurality of protruding buckles 1-3 are evenly distributed at intervals of a preset distance on the outer side edge of the bottom cover 1, which are used to buckle with the top edge of the washing cylinder of the washing machine. This structure optimizes the joint structure between the entire sealing cover device and the washing cylinder. By designing protruding buckles 1-3 on the outer side of the bottom cover 1 and setting corresponding matching structures on the top edge of the washing cylinder, the clamping connection between the two can be completed. When it is necessary to remove the sealing cover, just hold and pull the upper pull ring 3 by hand.

[0043] An embodiment of the present utility model further provides a washing machine, which includes a casing and a laundry tub located therein, and further includes the sealing cover device in any one of the above embodiments. Since the sealing cover device in the above embodiments has the above beneficial effects, the washing machine with this sealing cover device should also have corresponding beneficial effects.

[0044] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A sealing cover device for a washing machine, characterized in that, It includes a bottom cover (1) and an upper cover (2) which are buckled and docked with each other. The edge of the bottom cover (1) is used to dock with the top edge of the washing tub of the washing machine to seal the washing tub. The upper cover (2) is buckled on the upper end of the bottom cover (1), and a water inlet cavity is formed between them. The bottom cover (1) includes an arc-shaped part that slopes downward from the periphery to the center. The lowest position at the center of the arc-shaped part is provided with a water inlet (1-1), and the water in the water inlet cavity is output into the washing tub through the water inlet (1-1). The upper cover (2) is provided with a plurality of water injection holes (2-1), and the water injection holes (2-1) are used to communicate with the water injection mechanism of the washing machine to input water into the water inlet cavity through the water injection holes (2-1). A one-way valve mechanism is arranged between the outer periphery of the water inlet (1-1) and between the bottom cover (1) and the upper cover (2). The one-way valve mechanism is used to open under the push of the incoming water flow, connecting the area where the water inlet (1-1) is located with the water inlet cavity, and the one-way valve closes under the action of gravity in the state of no incoming water flow, isolating the water inlet (1-1) from the water inlet cavity.

2. The sealing cover device for a washing machine according to claim 1, characterized in that, The one-way valve mechanism includes a spacer plate (1-2) that is integrally and fixedly connected to the bottom cover (1) at the outer edge of the water inlet (1-1) and is distributed in a ring shape. A plurality of window structures (1-4) are evenly distributed on the side wall of the spacer plate (1-2) at a preset distance interval. Each window structure (1-4) is provided with a rotatable one-way valve plate (4) on the side adjacent to the water inlet (1-1). The one-way valve plate (4) is used to rotate and open towards the water inlet (1-1) under the push of the water flow, and fall back to close the window structure (1-4) under the action of gravity when there is no water flow.

3. The sealing cover device for a washing machine according to claim 2, characterized in that, The one-way valve mechanism further includes a top buckle plate. The top buckle plate is buckled with the top edge of the spacer plate (1-2) to close the top of the window structure (1-4). The one-way valve plate (4) is rotatably connected to the lower edge of the top buckle plate through a rotating shaft, and the outer edge of the top buckle plate is threadedly connected and fixed to the outer edge of the spacer plate (1-2) through a threaded connector.

4. The sealing cover device for a washing machine according to claim 3, characterized in that, The top buckle plate is provided with a protruding limit ejector rod on the side where the one-way valve plate (4) faces the water inlet (1-1). The maximum rotation angle of the one-way valve plate (4) is limited through the limit ejector rod to avoid jamming due to excessive valve plate opening.

5. The sealing cover device for a washing machine according to claim 1, characterized in that, The bottom cover (1) is provided with a plurality of upwardly protruding diversion grid structures (5) that are radially distributed around the water inlet (1-1). A groove-shaped structure is formed between adjacent diversion grid structures (5) to guide the water flow.

6. The sealing cover device for a washing machine according to any one of claims 1-5, characterized in that, The upper cover (2) is provided with an arc-shaped part that protrudes in an arc shape along the direction from the periphery to the center. The upper cover (2) is provided with a plurality of downwardly concave diversion grid structures (5) that are radially distributed from its center to the periphery. The water injection holes (2-1) are arranged in the diversion grid structures (5). The upper cover (2) is also evenly provided with the water injection holes (2-1) at the low points of the arc at its edge.

7. The sealing cover device for a washing machine according to claim 6, characterized in that, The upper cover (2) is integrally connected at its outer edge with a water retaining ring structure (2-2) erected on its plate surface structure, which is used to block the injected water flow on the upper surface of the upper cover (2) and guide it into the water injection hole (2-1).

8. The sealing cover device for a washing machine according to claim 7, characterized in that, It further includes an upper pull ring (3). The upper pull ring (3) has an annular structure and includes an integrally connected water inlet ring (3-2) and an arc-shaped extension ring (3-1). The water inlet ring (3-2) is buckled on the bent outer edge of the bottom cover (1), and a plurality of outer edge water holes (3-3) are evenly distributed thereon. The outer edge water holes (3-3) are used to communicate with the water injection mechanism of the washing machine for introducing the injected water into the water inlet cavity. The bottom surface of the extension ring (3-1) abuts against the upper end surface of the water retaining ring structure (2-2). The edge extended by the extension ring (3-1) is located above the upper cover (2) and is spaced from the upper cover (2) by a preset height for convenient hand-held operation.

9. The sealing cover device for a washing machine according to claim 6, characterized in that, A plurality of protruding buckles (1-3) are evenly distributed at preset intervals on the outer edge of the bottom cover (1) for buckling with the top edge of the laundry tub of the washing machine.

10. A washing machine, comprising a housing and a washing tub located therein, characterized in that, It further includes a sealing cover device for a washing machine according to any one of claims 1-9.

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