Washing machine drain valve and washing machine

Abstract

The invention discloses a washing machine drain valve which comprises a shell (1), a valve cavity (2) is formed in the shell (1), and a water inlet (4) and a water outlet (5) which are communicated with the valve cavity (2) are formed in the shell (1); a valve element (3) capable of rotating around a rotating shaft (9) is installed in the valve cavity (2), and the center of the valve element (3) and the rotating shaft (9) are eccentrically arranged. The rotating valve element (3) correspondingly opens and closes the water inlet (4), and a rotating shaft (9) of the valve element (3) and the axis of the water inlet (4) are arranged in a staggered mode. The center of the valve element and the rotating shaft are eccentrically arranged, so that the valve element can be separated from the water inlet only by rotating a small angle when the valve element rotates around the rotating shaft to open the water inlet, abrasion of the valve element in the opening and closing process is greatly reduced, and the service life of the drain valve structure is prolonged. Meanwhile, the device is simple in structure, remarkable in effect and suitable for application and popularization.

Description

Technical Field

[0001] The present invention belongs to the field of washing machines, and in particular, relates to a drain valve structure of a washing machine, and also relates to a washing machine equipped with the drain valve structure. Background Art

[0002] Washing machines are essential household appliances. They come in a variety of styles, each with its own distinct functions. Pulsator washers offer excellent washing results, quick wash times, and low power consumption. The drain valve is a crucial component in pulsator washers, controlling the flow of water from the drum.

[0003] On current washing machines, the drain valve is generally installed at the drain outlet at the bottom of the outer tub, with the water inlet of the drain valve connected to the outer tub, and the water outlet connected to the drain pipe of the washing machine. The valve core provided in the valve cavity of the drain valve is used to control the opening and closing of the water inlet or the water outlet, so as to achieve the effect of controllable opening and closing of the washing water in the outer tub and discharge it outside.

[0004] However, the valve core of the existing washing machine drain valve needs to move a large distance during the opening and closing process, and the above-mentioned distance may reduce the drainage efficiency and even affect whether the drain valve can work properly. In addition, during the opening and closing process, friction will be generated between the valve core and the sealing element on the inner wall of the valve cavity. The above-mentioned friction will cause the valve core to wear, causing the drain valve to leak and greatly reducing the service life of the drain valve.

[0005] In light of the aforementioned shortcomings of existing washing machine drain valve structures, the inventors, drawing on their years of practical experience and expertise in the design and manufacture of such products, have actively conducted research and innovation, aiming to develop a novel washing machine drain valve structure that would improve upon existing conventional washing machine drain valves and enhance their practicality. Through continuous research and design, as well as repeated prototype production and refinement, they have finally created this invention, which possesses truly practical value. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a washing machine drain valve to reduce wear and tear and increase the service life of the drain valve. Another object of the present invention is to provide a drain valve structure that reliably seals the water inlet of a closed drain valve.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A washing machine drain valve comprises: a housing 1, a valve chamber 2 being provided within the housing 1, a water inlet 4 and a water outlet 5 being provided on the housing 1 and communicating with the valve chamber 2; a valve core 3 rotatable about a rotating shaft 9 being installed within the valve chamber 2, the center of the valve core 3 being eccentrically arranged with respect to the rotating shaft 9; the rotating valve core 3 correspondingly opens and closes the water inlet 4, and the rotating shaft 9 of the valve core 3 is staggered with the axis of the water inlet 4.

[0009] Furthermore, a water inlet 4 is set at the top of the valve cavity 2 and a water outlet 5 is set on one side; the rotating shaft 9 of the valve core 2 is set horizontally, the rotating shaft 9 is perpendicular to the axis of the water outlet 5, and is located below the water inlet 4; the horizontal rotating shaft 9 of the valve core 2 is staggered with the vertical axis of the water inlet 4.

[0010] Furthermore, the valve core 3 includes left and right side portions 31 and 32 located on the left and right sides of the water outlet 5, and a top portion 33 that opens and closes corresponding to the water inlet 4 on the top wall of the valve chamber 2; the upper ends of the left and right side portions 31 and 32 are respectively connected to the corresponding side edges of the top portion 33 through a circular arc transition to form a U-shaped groove structure that is axially open toward the water outlet 5 and open downward; the outer sides of the left and right side portions 31 and 32 are respectively provided with outwardly protruding protruding shafts 34, and the two protruding shafts 34 are coaxially arranged to constitute the rotating shaft 9 of the valve core 3, and the two protruding shafts 34 are respectively connected to the left and right side walls of the valve chamber 2 in a one-to-one manner and can be rotatably connected around the axis.

[0011] Furthermore, a motor 8 is installed on the left or right side of the shell 1, and the output shaft of the motor 8 is coaxially fixedly connected to the protruding shaft 34 on the corresponding side of the valve core 3, and is used to drive the valve core 3 to rotate around the rotating shaft 9 to a closed position or an open position; when the valve core 3 rotates to the closed position, the top of the valve core 3 is at the highest point and is horizontally arranged, corresponding to the water inlet 4 provided on the top wall of the closed valve cavity 2; when the valve core 3 rotates to the open position, the top of the valve core 3 is at the side farthest from the water outlet 5 and is in a vertical position, corresponding to the water inlet 4 provided on the top wall of the open valve cavity 2.

[0012] Furthermore, the rotating shaft 9 of the valve core 3 is located between the vertical axis of the water inlet 4 and the water outlet 5 of the valve cavity 2, and the height of the rotating shaft 9 of the valve core 3 is lower than the height of the center of the valve core 3 in the closed position; preferably, the center of the valve core 3 in the closed position is coaxially arranged with the vertical axis of the water inlet 4.

[0013] Furthermore, a sealing ring 10 is provided at the water inlet 4 at the top of the valve chamber 3;

[0014] The top 33 of the valve core 3 is provided with a sealing portion 330 consisting of a concave-convex structure;

[0015] When the valve core 3 rotates to the closed position, the sealing portion 330 provided on the top 33 of the valve core 3 is in contact with the sealing ring 10 to seal the water inlet 4 .

[0016] Furthermore, the outer periphery of the top 33 of the valve core 3 is a circle of downward-inclined annular conical surface 331, and the middle part is a sealing part 330; the front part of the sealing part 330 is an inclined surface 332 inclined downward from front to back, and the rear part is a horizontally extending plane 333; the inner peripheral side of the sealing ring 10 at the water inlet 4 close to the water outlet 5 is sealed and abutted with the inclined surface 332 of the sealing part 330, and / or the lower side of the sealing ring 10 at the water inlet 4 close to the water outlet 5 is sealed and abutted with the outer peripheral annular conical surface 331; the lower side of the sealing ring 10 at the water inlet 4 away from the water outlet 5 is sealed and abutted with the plane 333 of the sealing part 330.

[0017] Furthermore, the housing 1 includes: a valve seat 11, which is square in shape and has an open rear side; a cover plate 12, which is correspondingly mounted on the rear side of the valve seat 11 and closes the rear opening; a water inlet 4 is provided on the top of the valve seat 11, and a water inlet connector 6 is installed, which is coaxially arranged opposite to the water inlet 4, and a sealing ring 10 is sandwiched between the water inlet connector 6 and the valve seat 11, and the sealing ring 10 covers the water inlet 4 of the valve seat 11; a water outlet 5 is provided on the front side of the square valve seat 11, and a water outlet connector 7 is provided at the water outlet 5, which protrudes outward horizontally.

[0018] Preferably, a sealing gasket 13 is sandwiched between the cover plate 12 and the rear side of the valve seat 11;

[0019] Preferably, the cover plate 12 and the valve seat 11 are fixedly connected via a plurality of screws that are threadedly engaged from back to front, and a sealing gasket 13 clamped therebetween is fixedly installed.

[0020] Furthermore, the sealing ring 10 provided at the water inlet 4 wraps the inner circumferential wall of the water inlet 4 of the valve seat 11, the outer part of the water inlet 4 on the inner wall of the valve cavity 2, and the junction between the outer wall of the valve seat 11 and the water inlet connector 6; preferably, the sealing ring 10 is made of EPDM material and is coated with a polytetrafluoroethylene coating on the outside.

[0021] Furthermore, a support member 14 is installed in the valve cavity 2 of the shell 1, and the support member 14 is fixedly connected to the shell 1. The support member 14 is connected to the support of the valve core 3 so that the shaft 9 can rotate around the axis; preferably, a support member 14 is installed on the left and right side walls of the valve cavity 2 respectively, and a semicircular mounting groove is provided on the support member 14 for supporting and connecting the protruding shaft 34 provided on the corresponding side of the valve core 3.

[0022] The present invention also provides a washing machine equipped with any of the above-mentioned washing machine drain valves.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0024] By eccentrically setting the center of the valve core and the rotating shaft, the valve core only needs to be rotated a small angle to separate the valve core from the water inlet when it rotates around the axis to open the water inlet, which greatly reduces the wear of the valve core during the opening and closing process, thereby improving the service life of the drain valve structure.

[0025] In addition, when the valve core is rotated to the closed position, the top of the valve core is at the highest point and is set horizontally, corresponding to the water inlet set on the top wall of the closed valve cavity. At this time, the sealing part of the top of the valve core is completely fitted and sealed with the water inlet, achieving the effect of effectively blocking the water inlet.

[0026] When the valve core is turned to the open position, the top of the valve core is at the farthest side from the water outlet and in a vertical position, corresponding to the opening of the water inlet set on the top wall of the valve cavity. At this time, the top of the valve core rotates to the vertical position, and the opening of the U-shaped groove-shaped valve core is opened toward the front water outlet. The valve core can be used to guide the water flow flowing in from the upper water inlet toward the front water outlet, so that the valve core also integrates the function of a drainage guide.

[0027] At the same time, the present invention has a simple structure, significant effects, and is suitable for popularization and use.

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0030] Figure 1 2 is a schematic structural diagram of a washing machine drain valve according to an embodiment of the present invention;

[0031] Figure 2 1 is a schematic diagram of the exploded structure of a washing machine drain valve according to an embodiment of the present invention;

[0032] Figure 3 is a schematic cross-sectional structural diagram of a washing machine drain valve in a closed state according to an embodiment of the present invention;

[0033] Figure 4 It is a schematic cross-sectional structural diagram of the opening process of the drain valve of the washing machine according to an embodiment of the present invention.

[0034] The main components in the figure are marked:

[0035] 1. Housing; 2. Valve chamber; 3. Valve core; 4. Water inlet; 5. Water outlet; 6. Water inlet connector; 7. Water outlet connector; 8. Motor; 9. Rotating shaft; 10. Sealing ring; 11. Valve seat; 12. Cover plate; 13. Sealing gasket; 14. Support member; 31. Left side; 32. Right side; 33. Top; 34. Protruding shaft; 331. Annular cone; 332. Inclined surface; 333. Plane.

[0036] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] like Figures 1 to 4 As shown, an embodiment of the present invention introduces a washing machine drain valve, comprising: a shell 1, a valve cavity 2 is provided inside the shell 1, and a water inlet 4 and a water outlet 5 connected to the valve cavity 2 are provided on the shell 1; a valve core 3 rotatable around a rotating shaft 9 is installed in the valve cavity 2, and the center of the valve core 3 is eccentrically arranged with respect to the rotating shaft 9; the rotating valve core 3 opens and closes the water inlet 4 correspondingly, and the rotating shaft 9 of the valve core 3 is staggered with the axis of the water inlet 4.

[0041] By eccentrically setting the center of the valve core 3 and the rotating shaft 9, when the valve core 3 rotates around the axis to open the water inlet 4, the valve core 3 only needs to be rotated a small angle to separate the water inlet 4, which greatly reduces the wear of the valve core 3 during the opening and closing process, thereby improving the service life of the drain valve structure.

[0042] In an embodiment of the present invention, a water inlet 4 is arranged at the top of the valve cavity 2 and a water outlet 5 is arranged on the front side; the rotating shaft 9 of the valve core 3 is arranged horizontally, and the rotating shaft 9 is arranged in the left and right directions perpendicular to the axis of the water outlet 5 and is located below the water inlet 4, and the horizontal rotating shaft 9 of the valve core 3 is arranged to intersect with the vertical axis of the water inlet 4.

[0043] In the embodiment of the present invention, the valve core 3 includes a left side portion 31 located on the left side of the water outlet 5, a right side portion 32 located on the right side, and a top portion 33 that opens and closes corresponding to the water inlet 4 on the top wall of the valve chamber 2; the upper ends of the left side portion 31 and the right side portion 32 are respectively connected to the corresponding side edges of the top portion 33 through an arc transition to form a U-shaped groove structure that is axially open toward the water outlet 5 and open downward.

[0044] At the same time, outwardly protruding shafts 34 are respectively provided on the outer side walls of the left side 31 and the right side 32 of the valve core 3. The two protruding shafts 34 are coaxially arranged to constitute the rotating shaft 9 of the valve core 3. The two protruding shafts 34 are respectively connected to the left and right side walls of the valve cavity 2 in a one-to-one manner, so that the valve core 3 can rotate around the axial direction of the rotating shaft 9 to correspond to the effect of opening or closing the water inlet 4 of the drain valve.

[0045] Preferably, the left and right side walls of the valve cavity 2 are respectively provided with sliding grooves extending horizontally from back to front, and the protruding shafts 34 of the left side 31 and the right side 32 of the valve core 3 are inserted into the sliding grooves one by one. The left and right side walls of the valve cavity 2 are also fixedly installed with support members 14, and the support member 14 is provided with a semicircular groove on the front side. The protruding shaft 34 on the corresponding side is limited in the groove of the support member 14 to fix the protruding shaft 34 assembled in the sliding groove in the front and rear directions, thereby realizing the installation and fixation of the valve core 3.

[0046] In an embodiment of the present invention, a motor 8 is installed on the left or right side of the shell 1, and the output shaft of the motor 8 is coaxially fixedly connected to the protruding shaft 34 on the corresponding side of the valve core 3, and is used to drive the valve core 3 to rotate around the rotating shaft 9 to a closed position or an open position. The output shaft of the motor 8 can drive the valve core to rotate around the rotating shaft in two circumferential directions, so as to achieve the effect of rotating the valve core between the closed position and the open position.

[0047] At the same time, when the valve core 3 is rotated to the closed position, the top 33 of the valve core 3 is at the highest point and is arranged horizontally, corresponding to the water inlet 4 provided on the top wall of the closed valve cavity 2. At this time, the sealing portion 330 of the top 33 of the valve core 3 is completely in contact with the water inlet 4, thereby achieving an effective blocking effect on the water inlet 4.

[0048] When the valve core 3 is rotated to the open position, the top 33 of the valve core 3 is at the side farthest from the water outlet 5 and is in a vertical position, corresponding to the opening of the water inlet 4 provided on the top wall of the valve chamber 2. At this time, the top 33 of the valve core 3 rotates to the vertical position, and the opening of the U-shaped valve core 3 is opened toward the front water outlet 5. The valve core 3 can be used to guide the inlet water flow flowing in from the upper water inlet 4 to flow toward the front water outlet 5, so that the valve core 3 also integrates the function of a drainage guide.

[0049] In this embodiment of the present invention, the rotation axis 9 of the valve core 3 is located between the vertical axis of the water inlet 4 and the water outlet 5 of the valve chamber 2, and the height of the rotation axis 9 of the valve core 3 is lower than the height of the center of the valve core 3 in the closed position. Preferably, the center of the valve core 3 in the closed position is coaxial with the vertical axis of the water inlet 4. As a result, the center of the valve core is eccentrically arranged relative to the rotation axis of the valve core toward the valve core opening rotation direction, thereby reducing the rotation angle of the valve core during the opening or closing operation of the valve core and reducing the movement friction of the valve core during the opening and closing process.

[0050] In the embodiment of the present invention, a sealing ring 10 is provided at the water inlet 4 at the top of the valve chamber 2; a sealing portion 330 having a concave-convex structure is provided at the top 33 of the valve core 3; when the valve core 3 rotates to the closed position, the sealing portion 330 provided at the top 33 of the valve core 3 fits in contact with the sealing ring 10, thereby sealing the water inlet 4. By providing a sealing portion at the top of the valve core, the top wall of the valve chamber 2 is opened and closed by utilizing the sealing portion provided at the top that protrudes upward to control the opening and closing of the water inlet 4, effectively preventing the washing water in the outer drum connected to the water inlet 4 from flowing in through this location. Therefore, during the operation of the washing machine, the washing water in the outer drum will not flow into the valve chamber 2 of the drain valve from the water inlet 4.

[0051] In the embodiment of the present invention, the outer periphery of the top 33 of the valve core 3 is a circle of downward-inclined annular conical surface 331, and the middle part is a sealing part; the front part of the sealing part is an inclined surface 332 inclined downward from front to back, and the rear part is a horizontally extending plane 333; the inner peripheral side of the sealing ring 10 provided at the water inlet 4 close to the water outlet 5 is sealed and abutted with the inclined surface 332 of the sealing part, and / or the lower side of the sealing ring 10 provided at the water inlet 4 close to the water outlet 5 and the outer peripheral annular conical surface 331; the lower side of the sealing ring 10 provided at the water inlet 4 away from the water outlet 5 is sealed and abutted with the plane 333 of the sealing part 330, so that the valve core 3 can use different parts to effectively block and close the water inlet 4 respectively; and can further reduce the contact between the valve core and the sealing ring 10 when the valve core 3 is opened, and reduce the wear of the drain valve.

[0052] In an embodiment of the present invention, the shell 1 includes a valve seat 11, which is square in shape, and the rear side of the square valve seat 11 is open; a cover plate 12 is correspondingly snap-fitted and installed on the rear side of the valve seat 11 to close the rear opening; a water inlet 4 is provided on the top of the valve seat 11, and a water inlet connector 6 is installed which is coaxially arranged opposite to the water inlet 4, a sealing ring 10 is clamped between the water inlet connector 6 and the valve seat 11, and the sealing ring 10 corresponds to covering the water inlet 4 of the valve seat 11; a water outlet 5 is provided on the front side of the square valve seat 11, and a water outlet connector 7 is provided at the water outlet 5 which protrudes horizontally outward; preferably, a circle of sealing gasket 13 is clamped between the cover plate 12 and the rear side of the valve seat 11.

[0053] Preferably, the cover plate 12 and the valve seat 11 are fixedly connected by a plurality of screws that are threaded from back to front, and the sealing gasket 13 clamped between the two is fixedly installed; the above-mentioned screws are arranged in a circle at intervals along the outer periphery of the valve cover to respectively screw-fix and assemble the cover plate 12 and the valve seat 11 connected in each direction, thereby preventing the occurrence of situations such as washing water flowing through the valve cavity flowing out.

[0054] Preferably, the water outlet 5 is arranged at the front bottom of the valve cavity 2 so that all the water flowing through the valve cavity 2 can flow out under the action of gravity, avoiding the occurrence of problems such as water accumulation in the valve cavity 2.

[0055] In the embodiment of the present invention, the sealing ring 10 provided at the water inlet 4 wraps the inner peripheral wall of the valve seat water inlet 4, the outer portion of the water inlet 4 on the inner wall of the valve cavity 2, and the junction of the outer wall of the valve seat 11 and the water inlet connector 6, so that the sealing ring 10 can statically seal the installation gap between the water inlet connector 6 and the shell 1, and can also contact the sealing portion 330 of the top 33 of the valve core 3 to effectively dynamically seal the water inlet 4, so that the sealing ring 10 can achieve a double sealing effect.

[0056] Preferably, the sealing ring 10 is made of EPDM material and coated with polytetrafluoroethylene on the outside to make the outer wall of the sealing ring smoother, so that the wear of the sealing ring 10 after contact with the valve core 3 is reduced, and the reliability of the drain valve is greatly improved.

[0057] In an embodiment of the present invention, a support member 14 is installed in the valve cavity 2 of the shell 1, and the support member 14 is fixedly connected to the shell 1. The support member 14 is connected to the support of the valve core 3 so that it can rotate around the axis 9 to enhance the supporting force of the valve core; preferably, a support member 14 is installed on the left and right side walls of the valve cavity 2 respectively, and a semicircular mounting groove is provided on the support member 14 for supporting the protruding shaft 34 provided on the corresponding side of the valve core 3, so as to achieve the effect of the valve core 3 being firmly installed around the axis in the drain valve shell 1.

[0058] A washing machine is also introduced in an embodiment of the present invention, which includes a water tub. A drain outlet is provided at the bottom of the water tub. The drain outlet is connected to a drain pipe through any of the above-mentioned drain valve structures to discharge the washing water in the water tub outward in a controllable manner.

[0059] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A washing machine drain valve, comprising: A housing (1), wherein a valve cavity (2) is provided inside the housing (1), and a water inlet (4) and a water outlet (5) are provided on the housing (1) and are communicated with the valve cavity (2); It is characterized in that A valve core (3) rotatable about a rotating shaft (9) is installed in the valve cavity (2), and the center of the valve core (3) is eccentrically arranged with respect to the rotating shaft (9); The rotating valve core (3) opens and closes the water inlet (4) accordingly, and the rotating shaft (9) of the valve core (3) and the axis of the water inlet (4) are arranged in a staggered manner.

2. A washing machine drain valve according to claim 1, characterized in that: A water inlet (4) is provided at the top of the valve chamber (2), and a water outlet (5) is provided at one side; The rotating shaft (9) of the valve core (2) is arranged horizontally, the rotating shaft (9) is perpendicular to the axis of the water outlet (5) and is located below the water inlet (4); The horizontal rotation axis (9) of the valve core (2) and the vertical axis of the water inlet (4) are arranged to intersect.

3. A washing machine drain valve according to claim 2, characterized in that: The valve core (3) comprises left and right side portions (31, 32) located on the left and right sides of the water outlet (5), and a top portion (33) opened and closed corresponding to the water inlet (4) on the top wall of the valve cavity (2); The upper ends of the left and right sides (31, 32) are respectively connected to the corresponding side edges of the top (33) via arc transitions to form a U-shaped groove structure that is axially open toward the water outlet (5) and opens downward. The outer sides of the left and right sides (31, 32) are respectively provided with outwardly protruding shafts (34), the two protruding shafts (34) are coaxially arranged to form a rotating shaft (9) of the valve core (3), and the two protruding shafts (34) are respectively connected to the left and right side walls of the valve cavity (2) in a one-to-one correspondence and can be rotatably connected around the axis.

4. A washing machine drain valve according to claim 3, characterized in that: A motor (8) is installed on the left or right side of the housing (1), and the output shaft of the motor (8) is coaxially fixedly connected to the protruding shaft (34) on the corresponding side of the valve core (3) for driving the valve core (3) to rotate around the rotating shaft (9) to a closed position or an open position; When the valve core (3) is turned to the closed position, the top of the valve core (3) is at the highest point and is arranged horizontally, corresponding to the water inlet (4) provided on the top wall of the closed valve cavity (2); When the valve core (3) is turned to the open position, the top of the valve core (3) is located at the side farthest from the water outlet (5) and is in a vertical position, corresponding to opening the water inlet (4) provided on the top wall of the valve cavity (2).

5. A washing machine drain valve according to claim 4, characterized in that: The rotating shaft (9) of the valve core (3) is located between the vertical axis of the water inlet (4) and the water outlet (5) of the valve cavity (2), and the height of the rotating shaft (9) of the valve core (3) is lower than the height of the center of the valve core (3) in the closed position; Preferably, the center of the valve core (3) in the closed position is coaxially arranged with the vertical axis of the water inlet (4).

6. A washing machine drain valve according to claim 5, characterized in that: A sealing ring (10) is provided at the water inlet (4) at the top of the valve chamber (3); The top (33) of the valve core (3) is provided with a sealing portion (330) having a concave-convex structure; When the valve core (3) rotates to the closed position, the sealing portion (330) provided on the top (33) of the valve core (3) is in contact with the sealing ring (10) to seal the water inlet (4).

7. A washing machine drain valve according to claim 6, characterized in that: The top (33) of the valve core (3) has a downwardly inclined annular conical surface (331) on its outer periphery, and a sealing portion (330) in its middle. The front side portion of the sealing portion (330) is a slope (332) that slopes downward from front to back, and the rear side portion is a horizontally extending plane (333); The inner circumferential side of the portion of the sealing ring (10) provided at the water inlet (4) close to the water outlet (5) is in sealing contact with the inclined surface (332) of the sealing portion (330), and / or the lower side of the portion of the sealing ring (10) provided at the water inlet (4) close to the water outlet (5) is in sealing contact with the outer annular conical surface (331); The lower side of the sealing ring (10) provided at the water inlet (4) away from the water outlet (5) is in sealing contact with the plane (333) of the sealing portion (330).

8. A washing machine drain valve according to any one of claims 1 to 7, characterized in that: The housing (1) comprises, The valve seat (11) is square in shape, and the rear side of the square valve seat (11) is open; The cover plate (12) is correspondingly mounted on the rear side of the valve seat (11) to close the rear opening; A water inlet (4) is provided on the top of the valve seat (11), and a water inlet connector (6) is installed coaxially with the water inlet (4). A sealing ring (10) is sandwiched between the water inlet connector (6) and the valve seat (11), and the sealing ring (10) covers the water inlet (4) of the valve seat (11). A water outlet (5) is provided on the front side of the square valve seat (11), and a water outlet joint (7) is provided at the water outlet (5) so as to protrude horizontally outward. Preferably, a sealing gasket (13) is sandwiched between the cover plate (12) and the rear side of the valve seat (11); Preferably, the cover plate (12) and the valve seat (11) are fixedly connected via a plurality of screws that are threadedly engaged from back to front, and a sealing gasket (13) clamped between the two is fixedly installed.

9. A washing machine drain valve according to claim 8, characterized in that: The sealing ring (10) provided at the water inlet (4) wraps the inner peripheral wall of the water inlet (4) of the valve seat (11), the peripheral portion of the water inlet (4) on the inner wall of the valve cavity (2), and the junction between the outer wall of the valve seat (11) and the water inlet connector (6); Preferably, the sealing ring (10) is made of EPDM material and is coated with polytetrafluoroethylene on the outside.

10. A washing machine drain valve according to any one of claims 1 to 9, characterized in that: A support member (14) is installed in the valve chamber (2) of the housing (1), the support member (14) is fixedly connected to the housing (1), and the support member (14) is connected to a support that can rotate around the rotating shaft (9) of the valve core (3); Preferably, a support member (14) is installed on the left and right side walls of the valve chamber (2), respectively, and a semicircular arc-shaped mounting groove is provided on the support member (14) for supporting and connecting the protruding shaft (34) provided on the corresponding side of the valve core (3).

11. A washing machine, characterized in that: A washing machine drain valve according to any one of claims 1 to 10 is installed.

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