CN223134812U

CN223134812U - Sealing cover device for washing machine and washing machine

Info

Publication number: CN223134812U
Application number: CN202421473083.1U
Authority: CN
Inventors: 任国庆; 冯聪亚; 冯欢厅
Original assignee: Ningbo Zhijie Xiaohuangya Electrical Appliance Co ltd
Current assignee: Ningbo Zhijie Xiaohuangya Electrical Appliance Co ltd
Priority date: 2024-06-25
Filing date: 2024-06-25
Publication date: 2025-07-22
Anticipated expiration: 2034-06-25

Abstract

The utility model provides a sealing cover device for a washing machine, the main body includes an upper cover and a bottom cover that are buckled with each other, and there is a water inlet cavity between the two. The lowest position of the bottom cover is provided with a water inlet for inputting water for washing, and the structure of the arc-shaped part and the lowest point water inlet can effectively avoid internal water accumulation; in order to close the water inlet when no water is input, a one-way valve mechanism is provided on the periphery of the water inlet, and when water comes from the outside, the mechanism can be closed due to the water inlet being drawn downward, and opened under the driving action of the water flow, so that the water flow can enter the water inlet through the valve mechanism, and when no water flows through, the one-way valve mechanism is closed again under the action of gravity due to its own structural design, and after the one-way valve mechanism is closed, even if there is upward steam inside the washing drum, it cannot pass through the water inlet area closed by the valve, effectively avoiding the steam in the washing drum from overflowing to the outside through the water inlet to damage the electrical components. The utility model also provides a washing machine.

Description

Sealing cover device for washing machine and washing machine

Technical Field

The utility model relates to the technical field of household appliances of washing machines, in particular to a sealing cover device for a washing machine and the washing machine.

Background

The existing washing machine is generally provided with an inner barrel and an outer barrel, water is distributed in the inner barrel and the outer barrel during washing, a plurality of dehydration holes are formed in the peripheral wall of the inner barrel, such as the barrel covers of the pulsator washing machine and the pulsator washing machine with the patent publication number of CN105297324A, water consumption is large during washing, water resource waste is caused, water is distributed between the inner barrel and the outer barrel, the consumption of the washing agent is large, the consumption of the washing agent is high, the cost is not easy to save, dirt of the washing machine is easy to remain between the inner barrel and the outer barrel, bacteria are bred, and a user is required to frequently detach the washing machine, so that the washing machine is very inconvenient to use.

In order to solve the technical problems, a pollution-free washing machine is proposed in the market, for example, a washing machine with a patent publication number of CN208121412U, which adopts a single-tub structure, namely, only a rotary tub is arranged without a water containing tub, so that water is more saved in the rotary tub during washing, a water guide cover is arranged on the inner peripheral wall surface of the rotary tub, a water inlet is arranged on the water guide cover, a water outlet is arranged on the peripheral wall and/or the bottom wall of the rotary tub, water in the rotary tub rises under the action of centrifugal force and enters the water guide cover during dehydration, and flows to the water outlet under the guidance of the water guide cover, so that the water is discharged to a water containing disc through the water outlet, and therefore, the dehydration effect can be improved under the conditions of canceling the water containing tub to simplify the structure, improving the capacity, reducing the breeding of dirt and bacteria and saving water.

However, in the existing market, the outer cover is only arranged on the outer box body outside the rotary drum, when the washing machine realizes the functions of drying and boiling and washing, hot air can rise to the outer cover of the outer box body and damage the controller arranged on the outer box body, so that the service life of the controller is influenced, water can splash out of the outer side of the rotary drum during dehydration, although the inner cover is arranged at the opening at the upper end of the rotary drum in the existing washing machine, the existing inner cover is insufficient in tightness due to the normally open water inlet structure to be arranged, and when the washing machine is used for drying and boiling and washing, water vapor is still easy to be discharged out of the drum through the water inlet hole and still can influence the electrical structure on the outer box body.

In summary, the existing washing machine has the technical problems that the sealing performance is insufficient, and the water vapor is easy to be discharged to damage the electric elements.

Disclosure of utility model

The utility model aims to solve the technical problems that the existing washing machine has insufficient tightness and water vapor is easy to be discharged to damage electric elements.

The utility model provides a sealing cover device for a washing machine, which comprises a bottom cover and an upper cover, wherein the bottom cover and the upper cover are mutually buckled and butted, the edge of the bottom cover is used for being butted with the top edge of a washing cylinder of the washing machine to seal the washing cylinder, the upper cover is buckled between the top edge of the bottom cover and form a water inlet cavity, the bottom cover comprises an arc-shaped part which inclines downwards from the periphery to the center, the lowest center of the arc-shaped part is provided with a water inlet, 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, the water injection holes are used for being communicated with a 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 arranged between the bottom cover and the upper cover and used for being opened under the pushing of water inlet flow, the area where the water inlet is located is communicated with the water inlet cavity, and the one-way valve is closed under the action of gravity under the condition of no water inlet flow, and the water inlet cavity are isolated.

The utility model provides a sealing cover device capable of effectively preventing water vapor from overflowing, which is buckled with the top end of a washing drum to seal the washing drum, wherein a main body of the sealing cover device comprises two parts which are buckled with each other, namely an upper cover and a bottom cover, a water inlet cavity for water inflow is arranged between the two parts, a water inlet is arranged at the lowest position of the bottom cover positioned at the bottom so as to input washing water into the washing drum at the lower part, the arc-shaped part is matched with the structure of the water inlet at the lowest point, thus effectively avoiding internal ponding, in order to seal the water inlet when water inflow is not input, a one-way valve mechanism is arranged at the periphery of the water inlet, the mechanism can be folded towards the lower part due to water flow, is opened under the pushing effect of water flow, so that water flow can enter the water inlet through the valve mechanism, when no water flow passes through, due to the self structural design of the one-way valve mechanism, the space where the water inlet is positioned is isolated from the water inlet cavity at the outer part under the action of gravity, and even if the inside of the washing drum is provided with upward steam which cannot pass through the water inlet area which is closed by the valve after the one-way valve mechanism is closed, the water inlet is effectively avoided from overflowing towards the outer part through the water inlet, and the water inlet area inside the washing drum is effectively protected.

As the preferable scheme, the one-way valve mechanism comprises a partition plate which is integrally and fixedly connected with a bottom cover at the outer edge of the water inlet to form annular distribution, a plurality of window structures are uniformly distributed on the side wall of the partition plate at intervals of preset distance, each window structure is provided with a rotatable one-way valve plate at one side of the window structure adjacent to the water inlet, and the one-way valve plate is used for rotating and opening towards one side of the water inlet under the pushing of water flow and falling back to close the window structure under the action of gravity when no water flow exists.

The design optimizes the structural design of the one-way valve mechanism, wherein the one-way valve mechanism comprises a fixed partition plate structure and a movable one-way valve plate, the partition plate is provided with a window structure matched with the one-way valve plate, the one-way valve plate can rotate and only can rotate towards one side of the water inlet, so that the one-way valve plate can be pushed away by water flow when water enters, and the one-way valve mechanism falls back under the gravity when no water flows, thereby ensuring the working effect.

As the preferable scheme, the one-way valve mechanism further comprises a top buckle plate, wherein the top buckle plate is buckled with the top edge of the partition plate so as to seal the top of the window structure, the one-way valve plate is rotatably connected with the lower edge of the top buckle plate through a rotating shaft, and the outer edge of the top buckle plate is fixedly connected with the outer edge of the partition plate through a threaded connecting piece in a threaded manner. The design has further optimized the structural design of check valve mechanism, for guaranteeing the holistic leakproofness of structure, avoids rivers or steam to overflow the structure top, sets up the top buckle and seals the top space of division board to guarantee the confined leakproofness of top buckle lock through threaded connection complex mode.

As the preferable scheme, the top buckle plate is provided with a protruding limit ejector rod at one side of the one-way valve plate, which faces the water inlet, and the limit ejector rod is used for limiting the maximum rotation angle of the one-way valve plate, so that overlarge clamping stagnation of the opening of the valve plate is avoided. This design carries out the supplementary optimization of adaptability to rotatable check valve plate structure, sets up the spacing ejector pin of position correspondence window structure in one side of top buckle water inlet, can be blocked by spacing ejector pin when check valve plate rotates to preset angle to water inlet one side, avoids its rotation angle too big, avoids the rotatory clamping stagnation condition that probably appears of valve plate.

As a preferable scheme, the bottom cover is provided with a plurality of radially distributed and upwards-protruded flow guide lattice structures around the water inlet, and groove-shaped structures are formed between adjacent flow guide lattice structures to guide water flow. According to the design, the surface structure design of the bottom cover is optimized, the radially distributed flow guide lattice structure can guide the direction of the injected water to the water inlet to be gathered, and the vortex in the water inlet cavity is reduced to enable the water to be discharged more smoothly.

As a preferable scheme, the upper cover is provided with arc-shaped parts protruding in an arc shape along the direction from the periphery to the center, the upper cover is provided with a plurality of diversion grid structures which are radially distributed and sunken downwards from the center to the periphery, and the water injection holes are arranged in the diversion grid structures; the upper cover is also uniformly distributed with the water injection holes at the arc-shaped low points of the edge of the upper cover. With reference to the design of the upper flow guide grid of the bottom cover, the upper cover is correspondingly optimized in structure, the middle part of the upper cover is high, the periphery of the upper cover is low, the whole upper cover is of an arc-shaped structure, and radial flow guide grids are arranged, so that water inflow vortex is reduced, water splash can be avoided, and water injection is smoother.

Preferably, the upper cover is integrally connected with a water retaining ring structure erected on the plate surface structure at the outer edge of the upper cover, and the water retaining ring structure is used for blocking the water injection flow on the upper surface of the upper cover from being guided into the water injection hole. The design further optimizes the structural design of the upper cover, and the vertical water retaining ring is arranged at the outer edge of the upper cover to limit the water injection area to flow through, so that the water injection is prevented from overflowing, and the use cleanliness of the washing machine is improved.

The water inlet ring is buckled on the upper bent outer edge of the bottom cover, a plurality of outer edge water holes are uniformly distributed on the water inlet ring and are used for communicating with a water injection mechanism of the washing machine and introducing water into the water inlet cavity, the bottom surface of the extending ring is abutted with the upper end surface of the water retaining ring structure, and the extending edge of the extending ring is spaced at preset height and is positioned above the upper cover, so that the water inlet ring is convenient to hold.

The design has further optimized sealed lid overall structure design, increases the pull ring above the upper cover, and its lock is in the upper cover, and outside the edge protrusion manger plate circle structure, the operator of being convenient for holds the operation installation or takes off sealed lid is whole to have the water inlet ring in the outer lane, its intercommunication intake chamber, except the water injection hole on the upper cover of above-mentioned, still increased the structure of follow sealed lid outer fringe to the water inlet chamber water injection, can be in water injection discharge too big, retrieve the flowing water that overflows when the manger plate circle structure of above-mentioned upper cover overflows.

As a preferable scheme, a plurality of raised buckles are uniformly distributed on the outer side edge of the bottom cover at intervals of preset distance and are used for being buckled with the top edge of a washing drum of the washing machine. The structure optimizes the joint structure between the whole sealing cover device and the washing drum, the convex buckle is designed at the outer side of the bottom cover, the corresponding matching structure is arranged at the top edge of the washing drum, the clamping between the sealing cover device and the washing drum can be completed, and when the sealing cover needs to be taken down, the user only needs to pull the upper pull ring in a hand manner.

The utility model also provides a washing machine, which comprises a shell, a washing cylinder positioned in the shell, and a sealing cover device in any one of the above, wherein the sealing cover device has the beneficial effects, so the washing machine with the sealing cover device has the corresponding beneficial effects.

Drawings

Fig. 1 is a schematic view showing an upper overall structure of a sealing cover device for a washing machine according to the present utility model;

FIG. 2 is a schematic view showing the overall structure of the lower part of the sealing cover device for the washing machine of FIG. 1;

FIG. 3 is a schematic side sectional view of the sealing cover device for the washing machine of FIG. 1 in an installed position;

FIG. 4 is a schematic view of the structure of an upper cover in the sealing cover device for the washing machine of FIG. 1;

Fig. 5 is a schematic structural view of a bottom cover in the sealing cover device for a washing machine of fig. 1.

Wherein, in fig. 1-5:

1. 1-1 parts of a bottom cover, 1-2 parts of a water inlet, 1-3 parts of a partition plate, 1-4 parts of a buckle, 1-4 parts of a window structure, 2 parts of an upper cover, 2-1 parts of a water injection hole, 2-2 parts of a water retaining ring structure, 3 parts of an upper pull ring, 3-1 parts of an extension ring, 3-2 parts of a water inlet ring, 3-3 parts of an outer edge water hole, 4 parts of a one-way valve plate and 5 parts of a flow guide grid structure.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

Before describing the working principle of the present utility model in detail, it should be further explained that in the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have specific orientations, be configured and operated in specific orientations, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "configured to," "connected," and the like are to be construed broadly as meaning, for example, "connected," either permanently connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via an intervening medium, or welded together. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present utility model.

Referring to fig. 1 to 5, an embodiment is described in which fig. 1 is a schematic view of an upper overall structure of a sealing cover device for a washing machine according to the present utility model, fig. 2 is a schematic view of a lower overall structure of the sealing cover device for a washing machine according to fig. 1, fig. 3 is a schematic view of a side sectional structure of the sealing cover device for a washing machine according to fig. 1 in an installation position, fig. 4 is a schematic view of an upper cover of the sealing cover device for a washing machine according to fig. 1, and fig. 5 is a schematic view of a bottom cover of the sealing cover device for a washing machine according to fig. 1.

The sealing cover device for the washing machine comprises a bottom cover 1 and an upper cover 2 which are mutually buckled and butted, wherein the edge of the bottom cover 1 is used for being butted with the top edge of a washing cylinder of the washing machine to seal the washing cylinder, the upper cover 2 is buckled between the top edge of the bottom cover 1 and form a water inlet cavity, the bottom cover 1 comprises an arc-shaped part which is downwards inclined from the periphery to the center, a water inlet 1-1 is arranged at the lowest center position of the arc-shaped part, water in the water inlet cavity is output into the washing cylinder through the water inlet 1-1, the upper cover 2 is provided with a plurality of water injection holes 2-1, the water injection holes 2-1 are communicated with a 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 periphery of the water inlet 1-1 and the upper cover 2 and is used for being opened under the pushing of water inflow, the area where the water inlet 1-1 is located is communicated with the water inlet cavity, and the one-way valve is closed under the action of gravity under the condition of no water inflow, and the water inlet 1-1 and the water inlet cavity are isolated.

The utility model provides a sealing cover device capable of effectively preventing water vapor from overflowing, which is buckled with the top end of a washing drum to seal the washing drum, wherein a main body of the sealing cover device comprises two parts which are buckled with each other, namely an upper cover 2 and a bottom cover 1, a water inlet cavity for water inflow is arranged between the two parts, a water inlet 1-1 is arranged at the lowest position of the bottom cover 1 positioned at the bottom so as to input water for washing into the washing drum downwards, the structure of the arc-shaped part matched with the water inlet 1-1 at the lowest point can effectively avoid internal ponding, a one-way valve mechanism is arranged at the periphery of the water inlet 1-1 when water inflow is not input, the mechanism can be folded towards the lower water inlet 1-1 due to water flow, the water flow can be started under the pushing action of water flow, when no water flow passes through the valve mechanism, the one-way valve mechanism is closed again under the self structural design, the space where the water inlet 1-1 is positioned is separated from the outer water inlet cavity of the washing drum under the action of the water inlet, and even if the upper steam in the drum is closed by the one-way valve mechanism, the water inlet 1-1 can not pass through the valve mechanism to be closed, and the water inlet 1-1 can not pass through the valve mechanism to the upper steam when the water inflow is closed, and the water flows outwards through the water inlet 1-1 effectively, and the washing drum can not pass through the water inlet 1.

In the technical scheme provided by the implementation, the one-way valve mechanism comprises a partition plate 1-2 which is fixedly connected with a bottom cover 1 at the outer edge of a water inlet 1-1 into an annular shape, a plurality of window structures 1-4 are uniformly distributed on the side wall of the partition plate 1-2 at intervals of preset distance, a rotatable one-way valve plate 4 is arranged on one side of each window structure 1-4 adjacent to the water inlet 1-1, the one-way valve plate 4 is used for being rotationally opened towards one side of the water inlet 1-1 under the pushing of water flow, and the window structures 1-4 are closed by falling back under the action of gravity when no water flow exists.

The design optimizes the structural design of the one-way valve mechanism, wherein the one-way valve mechanism comprises a fixed partition plate 1-2 structure and a movable one-way valve plate 4, the partition plate 1-2 is provided with a window structure 1-4 matched with the one-way valve plate 4, the one-way valve plate 4 can rotate and can only rotate towards one side of the water inlet 1-1, so that the one-way valve plate 4 can be pushed away by water flow when water enters, and falls back under gravity when no water flows, thereby ensuring the working effect.

In the technical scheme that this implementation provided, one-way valve mechanism still includes the top buckle, and the top buckle is buckled with the top edge of division board 1-2 to the top of closed window structure 1-4, but one-way valve plate 4 pass through the lower limb swivelling joint of pivot and top buckle, and the outside edge of top buckle passes through threaded connection spare and the outside edge threaded connection of division board 1-2 is fixed. The design further optimizes the structural design of the one-way valve mechanism, prevents water flow or steam from overflowing above the structure for ensuring the tightness of the whole structure, and is provided with a top buckle plate to seal the upper space of the spacing plate 1-2 and ensure the sealing tightness of the buckling of the top buckle plate in a threaded connection and matching way.

In the technical scheme that this implementation provided, the top buckle is provided with bellied spacing ejector pin in one side of one-way valve plate 4 towards water inlet 1-1, through the biggest rotation angle of spacing ejector pin restriction one-way valve plate 4, avoids the too big clamping stagnation of valve plate aperture. The design is suitable for supplementing and optimizing the structure of the rotatable one-way valve plate 4, one side of the water inlet 1-1 of the top buckle plate is provided with the limiting ejector rod with the position corresponding to the window structure 1-4, and the one-way valve plate 4 can be blocked by the limiting ejector rod when rotating to a preset angle to one side of the water inlet 1-1, so that the overlarge rotating angle of the one-way valve plate is avoided, and the clamping stagnation possibly caused by the rotation of the valve plate is avoided.

In the technical scheme provided by the implementation, a plurality of radially distributed and upward-protruding flow guide lattice structures 5 are arranged around the water inlet 1-1 of the bottom cover 1, and a groove-shaped structure is formed between every two adjacent flow guide lattice structures 5 to guide water flow. According to the design, the surface structure design of the bottom cover 1 is optimized, the radially distributed flow guide lattice structures 5 can guide the injected water to flow to the water inlet 1-1 to be gathered, and eddy in the water inlet cavity is reduced, so that the water is discharged more smoothly.

In the technical scheme provided by the implementation, the upper cover 2 is provided with a plurality of diversion grid structures 5 which are radially distributed and sunken downwards from the center of the upper cover 2 to the periphery along the arc-shaped part which is upwards arc-shaped from the periphery to the center, water injection holes 2-1 are arranged in the diversion grid structures 5, and the water injection holes 2-1 are uniformly distributed at the arc-shaped low points of the edge of the upper cover 2. With reference to the design of the flow guide grids on the bottom cover 1, the corresponding structural optimization is also performed on the upper cover 2, the middle part of the upper cover is high, the periphery of the lower cover is low, the whole upper cover is of an arc-shaped structure, and radial flow guide grids are arranged, so that water inflow vortex is reduced, water splash can be avoided, and water injection is smoother.

In the technical scheme provided by the implementation, the upper cover 2 is integrally connected with a water retaining ring structure 2-2 erected on the plate surface structure at the outer edge of the upper cover 2, and the water retaining ring structure is used for blocking the water injection flow on the upper surface of the upper cover 2 from being guided into the water injection hole 2-1. The design further optimizes the structural design of the upper cover 2, and the vertical water retaining ring is arranged at the outer edge of the upper cover to limit the water injection flowing through area, so that the water injection is prevented from overflowing, and the use cleanliness of the washing machine is improved.

In the technical scheme provided by the implementation, the water inlet device further comprises an upper pull ring 3, wherein the upper pull ring 3 is of an annular structure and comprises a water inlet ring 3-2 and an arc-shaped extension ring 3-1 which are integrally connected, the water inlet ring 3-2 is buckled on the upper bent outer edge of the bottom cover 1, a plurality of outer edge water holes 3-3 are uniformly distributed on the water inlet ring, the outer edge water holes 3-3 are communicated with a water injection mechanism of the washing machine and used for introducing water into a water inlet cavity, the bottom surface of the extension ring 3-1 is abutted with the upper end surface of the water retaining ring structure 2-2, and the extending edge of the extension ring is positioned above the upper cover 2 at preset intervals, so that the water inlet device is convenient to hold.

The design further optimizes the whole structure design of the sealing cover, an upper pull ring 3 is added above the upper cover 2 and buckled on the upper cover 2, the edge of the upper pull ring protrudes out of the water retaining ring structure 2-2, an operator can conveniently hold the whole sealing cover for operation, install or take down the whole sealing cover, a water inlet ring 3-2 is arranged on the outer ring and is communicated with a water inlet cavity, besides the water injection hole 2-1 on the upper cover 2, a structure for injecting water from the outer edge of the sealing cover to the water inlet cavity is also added, and overflowed running water can be recovered when the water injection flow is overlarge and overflows through the water retaining ring structure 2-2 of the upper cover 2.

In the technical scheme provided by the implementation, a plurality of raised buckles 1-3 are uniformly distributed on the outer side edge of the bottom cover 1 at intervals of preset distance and are used for being buckled with the top edge of a washing drum of the washing machine. The structure optimizes the joint structure between the whole sealing cover device and the washing drum, the convex buckles 1-3 are designed at the outer side of the bottom cover 1, the clamping between the sealing cover device and the washing drum can be completed by arranging corresponding matching structures at the top edge of the washing drum, and when the sealing cover needs to be taken down, the upper pull ring 3 is only needed to be pulled by hand.

The embodiment of the utility model also provides a washing machine, which comprises a machine shell, a washing drum positioned in the machine shell and the sealing cover device in any one of the embodiments, and the washing machine with the sealing cover device has the corresponding beneficial effects because the sealing cover device in the embodiment has the beneficial effects.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims

1. The sealing cover device for the washing machine is characterized by comprising a bottom cover (1) and an upper cover (2) which are buckled and butted with each other, wherein the edge of the bottom cover (1) is used for being butted with the top edge of a washing drum of the washing machine to seal the washing drum, the upper cover (2) is buckled between the upper end of the bottom cover (1) to form a water inlet cavity, the bottom cover (1) comprises an arc-shaped part which is downwards inclined from the periphery to the center, a water inlet (1-1) is arranged at the lowest center of the arc-shaped part, water in the water inlet cavity is output into the washing drum through the water inlet (1-1), the upper cover (2) is provided with a plurality of water injection holes (2-1) which are used for being communicated with a water injection mechanism of the washing machine, water inlet (2-1) is used for inputting water into the water inlet cavity through the water injection holes (2-1), a one-way valve mechanism is arranged between the periphery of the water inlet (1-1) and the upper cover (2), the one-way valve mechanism is used for opening the water inlet (1) under the pushing of the water inlet, and the water inlet (1) is closed under the action of gravity, and the water inlet (1) is closed under the water inlet state.

2. Sealing cover device for washing machine according to claim 1, characterized in that the one-way valve mechanism comprises a partition plate (1-2) which is fixedly connected with the bottom cover (1) at the outer edge of the water inlet (1-1) into a ring shape, a plurality of window structures (1-4) are uniformly distributed on the side wall of the partition plate (1-2) at preset distance, each window structure (1-4) is provided with a rotatable one-way valve plate (4) at one side of the window structure adjacent to the water inlet (1-1), and the one-way valve plate (4) is used for being rotated to open towards one side of the water inlet (1-1) under the pushing of water flow and falling back to close the window structure (1-4) under the action of gravity in the absence of water flow.

3. Sealing cover device for washing machine according to claim 2, characterized in that the one-way valve mechanism further comprises a top pinch plate which is buckled with the top edge of the partition plate (1-2) to close the top of the window structure (1-4), the one-way valve plate (4) is rotatably connected with the lower edge of the top pinch plate through a rotating shaft, and the outer edge of the top pinch plate is fixedly connected with the outer edge of the partition plate (1-2) through a threaded connection piece.

4. A sealing cover device for a washing machine according to claim 3, characterized in that the top pinch plate is provided with a raised limit ejector rod on the side of the unidirectional valve plate (4) facing the water inlet (1-1), and the maximum rotation angle of the unidirectional valve plate (4) is limited by the limit ejector rod, so that excessive clamping stagnation of the valve plate opening is avoided.

5. Sealing cover device for washing machine according to claim 1, characterized in that the bottom cover (1) is provided with a plurality of radially distributed and upwardly protruding flow guiding lattice structures (5) around the water inlet (1-1), between adjacent flow guiding lattice structures (5) a trough-like structure is formed for guiding the water flow.

6. The sealing cover device for the washing machine according to any one of claims 1 to 5, wherein the upper cover (2) is provided with arc-shaped parts protruding in an arc shape along the direction from the periphery to the center, the upper cover (2) is provided with a plurality of diversion grid structures (5) which are radially distributed and sunken downwards from the center to the periphery, the water injection holes (2-1) are arranged in the diversion grid structures (5), and the water injection holes (2-1) are uniformly distributed at the arc-shaped low points of the edge of the upper cover (2).

7. Sealing cover device for washing machine according to claim 6, characterized in that the upper cover (2) is integrally connected at its outer edge with a water deflector structure (2-2) standing on its plate surface structure for blocking the injection water flow on the upper surface of the upper cover (2) from being guided into the water injection hole (2-1).

8. The sealing cover device for a washing machine according to claim 7, further comprising an upper pull ring (3), wherein the upper pull ring (3) is in an annular structure and comprises 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 upper bent outer edge of the bottom cover (1), a plurality of outer edge water holes (3-3) are uniformly distributed on the water inlet ring, the outer edge water holes (3-3) are used for being communicated with a water injection mechanism of the washing machine and used for introducing water into the water inlet cavity, the bottom surface of the extension ring (3-1) is abutted with the upper end surface of the water retaining ring structure (2-2), and the extending edge of the extension ring (3-1) is located above the upper cover (2) and is spaced with the upper cover (2) by a preset height, so that the handheld operation is facilitated.

9. The sealing cover device for a washing machine according to claim 6, wherein a plurality of protruding buckles (1-3) are uniformly distributed at intervals of a preset distance on the outer side edge of the bottom cover (1) for buckling with the top edge of a washing drum of the washing machine.

10. A washing machine comprising a cabinet and a washing tub located therein, further comprising a sealing cover arrangement for a washing machine as claimed in any one of claims 1 to 9.