阅读说明：本技术 一种用于洗衣机的排水阀及洗衣机 (A drain valve and washing machine for washing machine ) 是由 邓安生 周兆国 王芳 于 2021-07-27 设计创作，主要内容包括：本发明提供了一种用于洗衣机的排水阀及洗衣机,排水阀包括：阀体,阀体设置有第一密封结构；排水阀密封塞,排水阀密封塞设置于所述阀体内,且排水阀密封塞设置有第二密封结构；密封弹性件,密封弹性件设置于排水阀密封塞内,用于将第一密封结构和第二密封结构抵接；其中,第一密封结构与第二密封结构过盈配合。通过控制第一密封结构和第二密封结构过盈配合,使得阀体和排水阀密封塞之间形成稳定的密封面；同时,通过设置密封弹性件,进而在密封弹性件的弹力作用下,将第一密封结构与第二密封结构紧密抵接形成稳定的过盈配合,进一步提升阀体和排水阀密封塞之间的密封面的稳定性,最终使得用于洗衣机的排水阀具有稳定的密封性能。(The invention provides a drain valve for a washing machine and a washing machine, wherein the drain valve comprises: the valve body is provided with a first sealing structure; the drain valve sealing plug is arranged in the valve body and is provided with a second sealing structure; the sealing elastic piece is arranged in the drain valve sealing plug and is used for abutting the first sealing structure and the second sealing structure; wherein, first seal structure and second seal structure interference fit. By controlling the interference fit of the first sealing structure and the second sealing structure, a stable sealing surface is formed between the valve body and the drain valve sealing plug; simultaneously, through setting up sealed elastic component, and then under the elastic force effect of sealed elastic component, closely the butt formation stable interference fit of first seal structure and second seal structure, further promote the stability of the sealed face between valve body and the drain valve sealing plug, finally make the drain valve that is used for washing machine have stable sealing performance.)

1. A drain valve for a washing machine, comprising:

the valve body is provided with a first sealing structure;

the drain valve sealing plug is arranged in the valve body and is provided with a second sealing structure;

the sealing elastic piece is arranged in the drain valve sealing plug and is used for abutting the first sealing structure and the second sealing structure;

wherein the first seal structure is in interference fit with the second seal structure.

2. The drain valve for the washing machine according to claim 1,

the first sealing structure is arranged as an annular groove, and the second sealing structure is arranged as a sealing convex rib; or the first sealing structure is arranged as a sealing convex rib, and the second sealing structure is arranged as an annular groove;

wherein, the annular groove and the sealing convex rib are in interference fit.

3. The drain valve for the washing machine as claimed in claim 2, wherein the annular groove comprises:

the interference main groove is in interference fit with the sealing convex rib to form a sealing surface;

the guide notch and the interference main groove are integrally formed, and the maximum groove diameter of the interference main groove is smaller than or equal to the minimum groove diameter of the guide notch.

4. The drain valve for the washing machine according to claim 3,

the interference main groove is arranged in a rectangular or U shape along the axial section of the valve body, and the guide groove opening is arranged in a trapezoid shape along the axial section of the valve body.

5. The drain valve for the washing machine as claimed in claim 3, wherein the sealing bead comprises:

the main body ring rib is in interference fit with the interference main groove.

6. The drain valve for the washing machine as claimed in claim 5, wherein the sealing bead further comprises:

and the sealing ring grooves are concavely arranged on the side surface of the main body ring rib and are arranged in a plurality of axial uniform intervals.

7. The drain valve for a washing machine according to any one of claims 2 to 6,

the drain valve sealing plug also comprises a valve plate, and the second sealing structure is annularly arranged at the periphery of the valve plate;

the valve body further comprises a drain pipe, and the first sealing structure is arranged at the periphery of the drain pipe;

the valve block is used for sealing the drain pipe, a first limiting structure is further arranged at the joint of the valve block and the second sealing structure, and a second limiting structure corresponding to the first limiting structure is arranged between the first sealing structure and the drain pipe.

8. The drain valve for the washing machine according to claim 7,

the first limiting structure is arranged as a limiting ring groove, and the second limiting structure is arranged as a limiting lug; or the first limiting structure is arranged as a limiting lug, and the second limiting structure is arranged as a limiting ring groove;

the limiting lug is clamped with the limiting ring groove.

9. The drain valve for washing machine as claimed in claim 7, wherein the drain valve sealing plug further comprises: one end of the valve plate is arranged on one end of the axial deformation part along the axial direction; the valve body connecting part is arranged at the other end of the axial deformation part along the axial direction; one end of the sealing elastic piece abuts against the end face, facing the valve body connecting part, of the valve plate;

the valve body further includes: the drain valve sealing plug main pipe is accommodated in the drain valve sealing plug main pipe, and one end of the drain valve sealing plug main pipe is communicated with the drain pipe; the plurality of branch pipes are communicated with the drain valve sealing plug main pipe; one end of the drain valve sealing plug main pipe, which is far away from the drain pipe, is provided with a sealing element, and the other end of the sealing elastic element is abutted to the sealing element.

10. A washing machine, characterized by comprising: a drain valve for a washing machine as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of washing machines, in particular to a drain valve for a washing machine and the washing machine.

Background

The washing machine is a common intelligent washing device, water needs to be automatically added and the water level needs to be kept in the washing process, and the water needs to be discharged when a certain washing step is finished; therefore, the washing machine is provided with a drain valve structure for controlling whether water is drained or not.

However, the drain valve structure of the existing washing machine is often formed by pressure extrusion to form a sealing surface; however, the washing machine often has vibration defects during the washing process, which causes the sealing surface formed by pressure extrusion to be loosened, thereby causing water leakage faults during the washing process of the washing machine, and particularly, when the area of the sealing surface formed by the drain valve is worn, the water leakage faults during the washing process of the washing machine are more serious.

Therefore, how to provide a drain valve of a washing machine with stable sealing performance becomes a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to solve the technical problem of providing a drain valve for a washing machine and the washing machine aiming at the defects in the prior art; the problem of washing machine's drainage valve sealing performance unstable among the prior art is solved to the aim at.

The technical scheme adopted by the invention for solving the technical problem is as follows: a drain valve for a washing machine, comprising:

the valve body is provided with a first sealing structure;

the drain valve sealing plug is arranged in the valve body and is provided with a second sealing structure;

the sealing elastic piece is arranged in the drain valve sealing plug and is used for abutting the first sealing structure and the second sealing structure;

wherein the first seal structure is in interference fit with the second seal structure.

Further, the first sealing structure is arranged to be an annular groove, and the second sealing structure is arranged to be a sealing convex rib; or the first sealing structure is arranged as a sealing convex rib, and the second sealing structure is arranged as an annular groove;

wherein, the annular groove and the sealing convex rib are in interference fit.

Further, the annular groove includes:

the interference main groove is in interference fit with the sealing convex rib to form a sealing surface;

the guide notch and the interference main groove are integrally formed, and the maximum groove diameter of the interference main groove is smaller than or equal to the minimum groove diameter of the guide notch.

Further, the cross section of the interference main groove along the axial direction of the valve body is set to be rectangular or U-shaped, and the cross section of the guide groove opening along the axial direction of the valve body is set to be trapezoidal.

Further, the sealing bead includes:

the main body ring rib is in interference fit with the interference main groove.

Further, the sealing rib further comprises:

and the sealing ring grooves are concavely arranged on the peripheral side surface of the main body ring rib and are arranged in a plurality of axial uniform intervals.

Further, the drain valve sealing plug also comprises a valve plate, and the second sealing structure is annularly arranged at the periphery of the valve plate;

the valve body further comprises a drain pipe, and the first sealing structure is arranged at the periphery of the drain pipe;

the valve block is used for sealing the drain pipe, a first limiting structure is further arranged at the joint of the valve block and the second sealing structure, and a second limiting structure corresponding to the first limiting structure is arranged between the first sealing structure and the drain pipe.

Furthermore, the first limiting structure is arranged as a limiting ring groove, and the second limiting structure is arranged as a limiting lug; or the first limiting structure is arranged as a limiting lug, and the second limiting structure is arranged as a limiting ring groove;

the limiting lug is clamped with the limiting ring groove.

Further, the drain valve sealing plug further includes: one end of the valve plate is arranged on one end of the axial deformation part along the axial direction; the valve body connecting part is arranged at the other end of the axial deformation part along the axial direction; one end of the sealing elastic piece abuts against the end face, facing the valve body connecting part, of the valve plate;

the valve body further includes: the drain valve sealing plug main pipe is accommodated in the drain valve sealing plug main pipe, and one end of the drain valve sealing plug main pipe is communicated with the drain pipe; the plurality of branch pipes are communicated with the drain valve sealing plug main pipe; one end of the drain valve sealing plug main pipe, which is far away from the drain pipe, is provided with a sealing element, and the other end of the sealing elastic element is abutted against the sealing element.

The invention adopts another technical scheme for solving the technical problem as follows: a washing machine, comprising: the drain valve for the washing machine as described above.

Compared with the prior art, the invention provides a drain valve for a washing machine and the washing machine, wherein the drain valve comprises: the valve body is provided with a first sealing structure; the drain valve sealing plug is arranged in the valve body and is provided with a second sealing structure; the sealing elastic piece is arranged in the drain valve sealing plug and is used for abutting the first sealing structure and the second sealing structure; wherein the first seal structure is in interference fit with the second seal structure. It can be understood that a stable sealing surface is formed between the valve body and the drain valve sealing plug by arranging a first sealing structure on the valve body, arranging a second sealing structure on the drain valve sealing plug and controlling the first sealing structure and the second sealing structure to be in interference fit; meanwhile, by arranging the sealing elastic piece, the first sealing structure and the second sealing structure are tightly abutted to form stable interference fit under the elastic action of the sealing elastic piece, the stability of a sealing surface between the valve body and the drain valve sealing plug is further improved, and finally the drain valve for the washing machine has stable sealing performance.

Drawings

Fig. 1 is a schematic perspective view of a drain valve for a washing machine according to the present invention;

fig. 2 is a perspective view illustrating another perspective view of a drain valve for a washing machine according to the present invention;

fig. 3 is a schematic perspective exploded view of a drain valve for a washing machine according to the present invention;

fig. 4 is a perspective exploded structure view of another view angle of a drain valve for a washing machine provided in the present invention;

fig. 5 is a schematic sectional view of a drain valve for a washing machine provided in the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic view of a variant of the invention of FIG. 6;

description of reference numerals:

10. a drain valve; 11. a valve body; 12. a drain valve sealing plug; 13. a sealing elastic member; 14. a first seal structure; 15. a second seal structure; 16. an annular groove; 17. sealing the convex ribs; 111. a drain pipe; 112. a second limit structure; 113. a drain valve sealing plug main pipe; 114. a branch pipe; 121. a valve plate; 122. a first limit structure; 123. an axial deformation portion; 124. a valve body connecting portion; 161. interference fit main grooves; 162. a guide slot; 171. a main body ring rib; 172. and a sealing ring groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The washing machine is a common intelligent washing device, water needs to be automatically added and the water level needs to be kept in the washing process, and the water needs to be discharged when a certain washing step is finished; therefore, the washing machine is provided with a drain valve structure for controlling whether water is drained or not. However, the drain valve structure of the existing washing machine is often formed by pressure extrusion to form a sealing surface; however, the washing machine often has vibration defects during the washing process, which causes the sealing surface formed by pressure extrusion to be loosened, thereby causing water leakage faults during the washing process of the washing machine, and particularly, when the area of the sealing surface formed by the drain valve is worn, the water leakage faults during the washing process of the washing machine are more serious.

The invention provides a drain valve for a washing machine and the washing machine based on the problems in the prior art, wherein a first sealing structure is arranged on a valve body, a second sealing structure is arranged on a drain valve sealing plug, and the first sealing structure and the second sealing structure are controlled to be in interference fit, so that a stable sealing surface is formed between the valve body and the drain valve sealing plug; meanwhile, by arranging the sealing elastic member, the first sealing structure and the second sealing structure are tightly abutted to form a stable interference fit under the elastic force action of the sealing elastic member, so that the stability of the sealing surface between the valve body and the drain valve sealing plug is further improved, and finally the drain valve for the washing machine has stable sealing performance.

Referring to fig. 1 to 5, a first embodiment of the present invention provides a drain valve 10 for a washing machine, wherein the drain valve 10 includes a valve body 11, a drain valve sealing plug 12 and a sealing elastic member 13; the valve body 11 is provided with a first sealing structure 14; the drain valve sealing plug 12 is arranged in the valve body 11, and the drain valve sealing plug 12 is provided with a second sealing structure 15; the sealing elastic piece 13 is arranged in the drain valve sealing plug 12 and is used for abutting the first sealing structure 14 and the second sealing structure 15; wherein the first sealing structure 14 is in interference fit with the second sealing structure 15.

It can be understood that a stable sealing surface is formed between the valve body 11 and the drain valve sealing plug 12 by arranging the first sealing structure 14 on the valve body 11, arranging the second sealing structure 15 on the drain valve sealing plug 12 and controlling the interference fit of the first sealing structure 14 and the second sealing structure 15; meanwhile, by arranging the sealing elastic part 13, the first sealing structure 14 and the second sealing structure 15 are tightly abutted to form a stable interference fit under the elastic force of the sealing elastic part 13, so that the stability of the sealing surface between the valve body 11 and the drain valve sealing plug 12 is further improved, and finally the drain valve 10 for the washing machine has stable sealing performance.

Referring to fig. 5 and 6 in combination, in other embodiments, the first sealing structure 14 is provided as an annular groove 16 and the second sealing structure 15 is provided as a sealing bead 17; the annular groove 16 is in interference fit with the sealing convex rib 17;

it can be understood that, by arranging the first sealing structure 14 as the annular groove 16 and the second sealing structure 15 as the sealing rib 17, the drain valve sealing plug 12 and the valve body 11 can be conveniently separated and sealed, and the sealing rib 17 is actively inserted into the annular groove 16 during the sealing process, so that the insertion process is more convenient, and the structural integrity of the annular groove 16 can be protected to the greatest extent by the movement of the sealing rib 17, and the service life of the first sealing structure 14 and the second sealing structure 15 can be prolonged; meanwhile, the first sealing structure 14 and the second sealing structure 15 can also directly form a concave-convex sealing surface; when the annular groove 16 is in interference fit with the sealing rib 17, stable interference contact is formed between the first sealing structure 14 and the second sealing structure 15, and the area of the interference contact is large, so that a stable sealing contact surface is formed between the valve body 11 and the drain valve sealing plug 12, and the drain valve 10 has stable sealing performance.

With continued reference to fig. 5 and 7, in other embodiments, the first seal structure 14 is provided as a seal bead 17 and the second seal structure 15 is provided as an annular groove 16; the annular groove 16 is in interference fit with the sealing rib 17.

It can be understood that by arranging the first sealing structure 14 as the sealing rib 17 and the second sealing structure 15 as the annular groove 16, the weight of the drain valve sealing plug 12 can be reduced, the elastic deformation resistance of the sealing elastic part 13 can be reduced, the service life of the sealing elastic part 13 can be prolonged, and the sealing performance of the drain valve 10 can be ensured; simultaneously, the first sealing structure 14 and the second sealing structure 15 directly form a concave-convex sealing surface; when the annular groove 16 is in interference fit with the sealing rib 17, stable interference contact is formed between the first sealing structure 14 and the second sealing structure 15, and the area of the interference contact is large, so that a stable sealing contact surface is formed between the valve body 11 and the drain valve sealing plug 12, and the drain valve 10 has stable sealing performance.

In other embodiments, the inner width of the annular groove 16 is less than 0.2mm of the thickness of the sealing bead 17.

It can be understood that by controlling the inner width of the annular groove 16 to be smaller than the thickness of the sealing rib 17, the sealing rib 17 and the annular groove 16 have sufficient interference, so that a stable sealing structure is formed between the sealing rib 17 and the annular groove 16.

Referring to fig. 5-7 in combination, in other embodiments, the annular groove 16 includes: an interference main groove 161 and a guide groove opening 162; the guide notch 162 and the main interference groove 161 are integrally formed, the maximum groove diameter of the main interference groove 161 is smaller than or equal to the minimum groove diameter of the guide notch 162, and the main interference groove 161 and the sealing rib 17 are in interference fit to form a sealing surface.

It can be seen that the annular groove 16 has both a sealing portion (main interference groove 161) and a guiding portion (guiding groove 162), so that the sealing rib 17 can be quickly and accurately inserted into the main interference groove 161 under the guidance of the guiding groove 162, and form a stable sealing surface in interference fit with the main interference groove 161, so that the drain valve 10 has stable sealing performance; meanwhile, the damage of a concave-convex joint surface caused by the shearing action of the sealing convex rib 17 and the annular groove 16 can be effectively avoided, so that the sealing performance of the drain valve 10 is influenced, and the service life of the drain valve 10 is effectively prolonged; and the resistance of the sealing convex rib 17 entering the annular groove 16 is effectively reduced, so that the elastic deformation resistance of the sealing elastic part 13 is effectively reduced, and the service life of the sealing elastic part 13 is prolonged. By arranging the guide notch 162 and the interference main groove 161 to be integrally formed, the integrally formed annular groove 16 has good product consistency, the sealing performance of the annular groove 16 is ensured, the stability of the sealing structure between the annular groove 16 and the sealing convex rib 17 is improved, and the drain valve 10 has stable sealing performance; through setting up the biggest groove diameter of interference owner groove 161 is less than the minimum groove diameter of guide notch 162 has realized guide notch 162 is to the guide effect of sealed protruding muscle 17, and then the effectual sealing performance who ensures annular groove 16.

Referring to fig. 6 and 7, in particular, the depth H of the main interference groove 161₂Can be set to 1mm, the depth H of the guide notch 162₁Can be set to 0.6 mm; the depth H of the interference main groove 161₂And the depth H of the guide notch 162₁And the strength of the sealing surface can be improved by adjusting according to the using capacity of the washing machine.

Referring to fig. 5 to 7, in other embodiments, the interference main groove 161 is rectangular or U-shaped in cross section along the axial direction of the valve body 11, and the guide groove 162 is trapezoidal in cross section along the axial direction of the valve body 11.

It can be understood that the cross section of the main interference groove 161 along the axial direction of the valve body 11 is rectangular or U-shaped, so that when the sealing rib 17 is in interference fit with the annular groove 16, a plurality of sealing surfaces are formed between the sealing rib 17 and the main interference groove 161, which effectively improves the sealing performance between the sealing rib 17 and the annular groove 16, and further provides stable sealing performance between the valve body 11 and the drain valve sealing plug 12; the section of the guide groove opening 162 along the axial direction of the valve body 11 is trapezoidal, so that the situation that the joint surface is damaged and the sealing effect of the drain valve 10 is influenced due to the shearing action of the sealing convex rib 17 and the annular groove 16 under the elastic force action of the sealing elastic piece 13 is effectively avoided, and the service life of the drain valve 10 is further prolonged; meanwhile, under the guiding action of the guiding groove opening 162, the sealing rib 17 can smoothly enter the interference main groove 161 when being matched each time, and forms a stable sealing structure with the interference main groove 161, so that the drain valve 10 has stable sealing performance.

Referring to fig. 6 and 7, in other embodiments, the sealing rib 17 includes a main body annular rib 171, and the main body annular rib 171 is in interference fit with the main interference groove 161.

It can be understood that the sealing rib 17 forms a combining surface with the annular groove 16 through the arranged main body annular rib 171, and when the annular groove 16 is in interference fit with the sealing rib 17, a stable sealing structure is formed between the main body annular rib 171 and the interference main groove 161.

Referring to fig. 6 and 7, in particular, the thickness D of the main body rib 171 is 1.5mm, the front portion of the main body rib 171 may be configured as an arc, and the thickness D of the main body rib 171 may also be adjusted according to the use capacity of the washing machine to improve the strength of the sealing surface.

Referring to fig. 3, in another embodiment, the sealing rib 17 further includes a plurality of sealing ring grooves 172, the sealing ring grooves 172 are concavely disposed on the side surface of the main body rib 171, and the plurality of sealing ring grooves 172 are uniformly spaced along the axial direction of the drain valve sealing plug 12.

It can be understood that a plurality of sealing ring grooves 172 are uniformly and concavely arranged on the side surface of the main body ring rib 171 at intervals, and the arrangement positions of the plurality of sealing ring grooves 172 can be selected from the inner side surface of the main body ring rib 171 facing the axial direction, the outer side surface of the main body ring rib 171 deviating from the axial direction, or the inner side surface and the outer side surface are both provided with the plurality of sealing ring grooves 172; work as main part ring muscle 171 with when interference owner groove 161 is in encapsulated situation, main part ring muscle 171 with extrude each other between the inner wall of interference owner groove 161, sealed annular 172 can do main part ring muscle 171 provides deformation space, still can make the inner wall of interference owner groove 161 with the regional deformation of sealed annular 172 contact stretches into interference owner groove 161 with form a plurality of miniature sealing rings between the main part ring muscle 171, and then effectual increase interference owner groove 161 with the area of the sealed face between the main part ring muscle 171 effectively promotes the sealing performance of main part ring muscle 171 and interference owner groove 161, and then effectively promotes drain valve 10's sealing performance.

Referring to fig. 3 to fig. 7, in other embodiments, the drain valve sealing plug 12 further includes a valve plate 121, and the second sealing structure 15 is disposed around the outer periphery of the valve plate 121; the valve body 11 further includes a drain pipe 111, and the first sealing structure 14 is provided at an outer periphery of the drain pipe 111; the valve plate 121 is used for sealing the drain pipe 111; a first limiting structure 122 is further formed at the joint of the valve plate 121 and the second sealing structure 15, and a second limiting structure 112 corresponding to the first limiting structure 122 is arranged between the first sealing structure 14 and the drain pipe 111.

It can be understood that, through the valve block 121 with correspond between the drain pipe 111 and set up first limit structure 122 with second limit structure 112, work as the valve block 121 with behind the formation seal structure between the drain pipe 111 the valve block 121 and the drain pipe 111 binding face are forming radial spacing, prevent the valve block 121 with drain pipe 111 radial excursion leads to the seal structure dislocation to cause drain valve 10 to leak, the effectual stability that strengthens drain valve 10 seal structure, and the effectual sealed effect of drain valve 10 of having avoided is influenced by laundry in-process washing machine vibrations, and then the effectual sealing performance who promotes drain valve 10.

Referring to fig. 4 to fig. 7, in detail, the first sealing structure 14 is disposed at an outer periphery of the water discharge pipe 111 facing the nozzle of the valve plate 121.

Referring to fig. 5 and fig. 6, in other embodiments, the first limiting structure 122 is configured as a limiting ring groove, and the second limiting structure 112 is configured as a limiting protrusion, and the limiting protrusion is engaged with the limiting ring groove.

It can be understood that, will first limit structure 122 sets up to spacing annular and second limit structure 112 sets up to spacing lug, works as the valve block 121 with behind the formation seal structure between the drain pipe 111, spacing lug with spacing annular joint, it is right valve block 121 and drain pipe 111 form radial spacing, prevent the valve block 121 with drain pipe 111 radial excursion leads to the seal structure dislocation to cause drain valve 10 to leak, the effectual stability that strengthens drain valve 10 seal structure, and the effectual sealed effect of drain valve 10 of having avoided is influenced by laundry in-process washing machine vibrations, and then the effectual sealing performance who promotes drain valve 10.

Referring to fig. 5 and 7 in combination, in other embodiments, the first position-limiting structure 122 is configured as a position-limiting protrusion, and the second position-limiting structure 112 is configured as a position-limiting ring groove; the limiting lug is clamped with the limiting ring groove.

It can be understood that can select as required will first limit structure 122 sets up to spacing lug, will second limit structure 112 sets up to spacing annular, works as spacing lug with behind the spacing annular joint, it is right valve block 121 and drain pipe 111 form radial spacing, the effectual stability that strengthens drain valve 10 seal structure has avoided the sealed effect of drain valve 10 to receive washing machine vibrations among the laundry process and has influenced.

Referring to fig. 3 and 5 in combination, in other embodiments, the drain valve sealing plug 12 further comprises: an axial deformation portion 123 and a valve body connecting portion 124; one end of the valve plate 121 is disposed at one axial end of the axial deformation portion 123, the valve body connecting portion 124 is disposed at the other axial end of the axial deformation portion 123, and one end of the sealing elastic member 13 abuts against the valve plate 121 toward the end face of the valve body connecting portion 124.

It can be understood that the drain valve sealing plug 12 sequentially includes a valve plate 121, an axial deformation part 123 and a valve body connecting part 124 along the axial direction, wherein the second sealing structure 15 and the valve plate 121 are located at the same axial position; by arranging the axial deformation part 123, the extension length of the drain valve sealing plug 12 along the axial direction can be changed, so that the valve plate 121 is separated from the drain pipe 111, and the second sealing structure 15 is separated from the first sealing structure 14; through the arrangement of the valve body connecting part 124, one end of the drain valve sealing plug 12 in the axial direction is connected with the valve body 11, so that when the axial deformation part 123 deforms, the drain valve sealing plug 12 is prevented from being integrally separated from the valve body 11; meanwhile, the valve body connecting part 124 is fixedly connected with the valve body 11, so that the support can be provided for one end of the sealing elastic part 13, and the switching operation of the sealing and water discharging modes of the water discharging valve 10 is effectively guaranteed.

Referring to fig. 3 to 5, in other embodiments, the valve body 11 further includes: a drain valve sealing plug main pipe 113 and a plurality of branch pipes 114; the drain valve sealing plug 12 is accommodated in the drain valve sealing plug main pipe 113, and one end of the drain valve sealing plug main pipe 113 is communicated with the drain pipe 111; the plurality of branch pipes 114 are communicated with the drain valve sealing plug main pipe 113; one end of the drain valve sealing plug main pipe 113, which is away from the drain pipe 111, is provided with a sealing element, and the other end of the sealing elastic element 13 abuts against the sealing element.

It can be understood that the drain valve sealing plug 12 is accommodated in the drain valve sealing plug main pipe 113, and is used for realizing the communication or the closing between the drain valve sealing plug main pipe 113 and the drain pipe 111, without affecting the communication or the closing between the drain valve sealing plug main pipe 113 and the plurality of branch pipes 114, and ensuring that the functions of the drain valve 10 are not affected when the functions are normally switched; the sealing element is arranged at one end of the drain valve sealing plug main pipe 113, which is far away from the drain pipe 111, and is matched with the valve body connecting part 124 on the drain valve sealing plug 12, so that the sealing between the drain valve sealing plug main pipe 113 and the outside of the drain valve sealing plug main pipe 113 is realized, and the water flow in the drain valve sealing plug main pipe 113 is ensured not to flow out from one end of the drain pipe 111; the sealing elastic element 13 is usually connected with a pull rope or a tension spring, and of course, the sealing elastic element 13 may also be connected with other connecting elements to realize the separation or elastic action of the sealing elastic element 13 and the valve plate 121, which is not described in detail; the other end of the sealing elastic part 13 is abutted against the sealing part, so that the sealing part axially limits the sealing elastic part 13, and further prevents the sealing elastic part 13 from being separated from the main pipe 113 of the drain valve sealing plug under the action of a tensile rope or a tension spring and the self elasticity of the sealing elastic part 13, thereby effectively ensuring the normal switching of the drainage and sealing functions of the drain valve 10; specifically, when the drain valve 10 drains water, the sealing elastic member 13 is driven by a pull rope or a tension spring to separate from the valve plate 121, so that the valve plate 121 is separated from the drain pipe 111 under the restoring action of the axial deformation part 123, and the drain valve sealing plug main pipe 113 is communicated with the drain pipe 111, thereby realizing normal drainage of the drain valve 10; when the drain valve 10 is sealed, the acting force of the pull rope or the tension spring on the sealing elastic part 13 is released, so that the valve plate 121 and the drain pipe 111 form a sealing structure under the elastic force action of the sealing elastic part 13, and further, the water in the drain valve sealing plug main pipe 113 is prevented from flowing out of the drain pipe 111, and the sealing function of the drain valve 10 is realized.

A second embodiment of the present invention provides a washing machine including the drain valve 10 for a washing machine according to the above embodiment of the present invention. It can be understood that, in the washing machine provided by the present invention, by using the drain valve 10 for the washing machine implemented as above, the first sealing structure 14 is arranged on the valve body 11, the second sealing structure 15 is arranged on the drain valve sealing plug 12, and the first sealing structure 14 and the second sealing structure 15 are controlled to be in interference fit, so that a stable sealing surface is formed between the valve body 11 and the drain valve sealing plug 12; meanwhile, by arranging the sealing elastic part 13, the first sealing structure 14 and the second sealing structure 15 are tightly abutted to form a stable interference fit under the elastic force action of the sealing elastic part 13, so that the stability of the sealing surface between the valve body 11 and the drain valve sealing plug 12 is further improved, and finally the washing machine disclosed by the invention has stable sealing performance.

In summary, the present invention discloses a drain valve for a washing machine and a washing machine, wherein the drain valve comprises: the valve body is provided with a first sealing structure; the drain valve sealing plug is arranged in the valve body and is provided with a second sealing structure; the sealing elastic piece is arranged in the drain valve sealing plug and is used for abutting the first sealing structure and the second sealing structure; wherein the first seal structure is in interference fit with the second seal structure. It can be understood that a stable sealing surface is formed between the valve body and the drain valve sealing plug by arranging a first sealing structure on the valve body, arranging a second sealing structure on the drain valve sealing plug and controlling the first sealing structure and the second sealing structure to be in interference fit; meanwhile, the first sealing structure and the second sealing structure are tightly abutted to form stable interference fit by arranging the sealing elastic part under the elastic force action of the sealing elastic part, so that the stability of a sealing surface between the valve body and the drain valve sealing plug is further improved, and finally the drain valve for the washing machine has stable sealing performance.

It is to be understood that the invention is not limited in its application to the details of the foregoing description, and that modifications and variations may be effected by those skilled in the art in light of the above teachings, all within the scope and range of equivalents of the appended claims.