Drain valve and water outlet device

Abstract

The present invention discloses a drain valve and a water outlet device, wherein the drain valve comprises: a shell and a movable part, wherein the shell defines a water inlet channel, a water outlet channel and a drain channel which are interconnected; the movable part is movably arranged in the shell to selectively block the drain channel; wherein when the movable part is driven by water flow pressure to start moving and the water inlet channel is not fully opened, the movable part has already blocked the drain channel.

Description

Technical Field

[0001] The present invention relates to the technical field of water valves, and in particular to a drain valve and a water outlet device comprising the drain valve. Background Art

[0002] After using the shower, the valve on the water pipe is usually closed to stop the water supply to the shower. At the moment of closing the valve, there will still be water inside the shower, and this residual water will slowly drip out from the shower head, affecting the user experience.

[0003] In order to solve the problem of residual water dripping from the shower head, a drain valve capable of automatic drainage is proposed in the related art, which mainly provides a drainage channel so that when the water supply is stopped, the residual water can be discharged through the drainage channel. However, when the drain valve is passed through, water may flow out of the drainage channel, resulting in water leakage. Summary of the invention

[0004] An embodiment of the present invention provides a drain valve capable of preventing water leakage.

[0005] An embodiment of the present invention further provides a water outlet device including the above-mentioned drain valve.

[0006] The drain valve of an embodiment of the present invention comprises: a shell and a movable part, wherein the shell defines an inlet channel, an outlet channel and a drain channel that are interconnected; the movable part can be movably arranged in the shell to selectively block the drain channel; wherein, when the movable part is driven by the water flow pressure to start moving and the water inlet channel is not fully opened, the movable part has already blocked the drain channel.

[0007] According to some embodiments of the present invention, the movable part includes: a valve core and an elastic part, the valve core is movably arranged in the shell and can cooperate with a first sealing member so that the first sealing member can selectively block the drainage channel; the elastic member is arranged in the shell to provide elastic force to the valve core so that it has a tendency to move to an initial position; wherein, when the valve core is not subjected to water flow pressure, the valve core is in the initial position.

[0008] According to some embodiments of the present invention, the first sealing member is an annular structure, is sleeved on the outer circumference of the valve core, and can move with the valve core.

[0009] According to some embodiments of the present invention, the housing has a first cavity, the first cavity is in communication with the drainage channel and has a first opening;

[0010] The valve core is movably disposed in the first cavity through the first opening, so that the first sealing member can slidably abut against the inner wall surface of the first cavity to block the drainage channel.

[0011] According to some embodiments of the present invention, the first sealing member is a Y-shaped sealing ring.

[0012] According to some embodiments of the present invention, the housing has a second cavity, the second cavity is in communication with the water inlet channel, and has a second opening;

[0013] The valve core is movably disposed in the second cavity through the second opening;

[0014] When part of the valve core is disposed in the second cavity, a water inlet end surface of the valve core and an inner wall surface of the second cavity form an energy storage cavity to accumulate water flow pressure entering the energy storage cavity.

[0015] According to some embodiments of the present invention, the valve core is provided with a sealing portion, and a gap is provided between an outer peripheral surface of the sealing portion and an inner wall surface of the second cavity.

[0016] According to some embodiments of the present invention, the movable member further comprises a second sealing member, which is sleeved on the outer periphery of the valve core and can move with the valve core;

[0017] When the valve core moves relative to the second cavity, the second sealing member can slidably abut against the inner wall surface of the second cavity to selectively block the water inlet channel.

[0018] According to some embodiments of the present invention, the second sealing member is a Y-shaped sealing ring.

[0019] According to some embodiments of the present invention, the housing includes a guide column, and the valve core has a guide hole that cooperates with the guide column.

[0020] The water outlet device according to the embodiment of the present invention includes the water drain valve described above.

[0021] An embodiment of the above invention has at least the following advantages or beneficial effects:

[0022] In the drain valve and water outlet device of the embodiment of the present invention, when the movable part starts to move under the pressure of water flow and the water inlet channel is not fully opened, the movable part has already blocked the drain channel. Therefore, before the water inlet channel is fully opened, the drain channel has already been closed, so the water flow will not flow out of the drain channel, and the problem of water leakage in the drain channel under low water pressure can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0024] Figure 1 Shown is a schematic diagram of a drainage valve according to a first embodiment of the present invention from one viewing angle.

[0025] Figure 2 Shown is a schematic diagram of the drain valve of the first embodiment of the present invention from another perspective.

[0026] Figure 3 Shown is an exploded view of a drain valve according to a first embodiment of the present invention.

[0027] Figure 4 FIG. 1 is a schematic diagram of a valve body according to a first embodiment of the present invention.

[0028] Figure 5 FIG. 1 is a schematic diagram of a valve core according to a first embodiment of the present invention.

[0029] Figure 6 FIG. 1 is a schematic diagram of a valve seat according to a first embodiment of the present invention.

[0030] Figure 7 Shown is a cross-sectional view of a valve seat according to a first embodiment of the present invention.

[0031] Figures 8 to 10 Shown are cross-sectional views of the drain valve according to the first embodiment of the present invention in different states.

[0032] Fig.11 Shown is a schematic diagram of a drainage valve according to a second embodiment of the present invention from one viewing angle.

[0033] Fig.12 Shown is a schematic diagram of a drain valve according to a second embodiment of the present invention from another perspective.

[0034] Fig.13 Shown is an exploded view of a drain valve according to a second embodiment of the present invention.

[0035] Fig.14 FIG. 1 is a schematic diagram of a valve core according to a second embodiment of the present invention.

[0036] Fig.15 Shown is a cross-sectional view of a valve core according to a second embodiment of the present invention.

[0037] Fig.16 FIG. 1 is a schematic diagram of a valve seat according to a second embodiment of the present invention.

[0038] Fig.17 Shown is a cross-sectional view of a valve seat according to a second embodiment of the present invention.

[0039] Figures 18 to 20 Shown are cross-sectional views of a drain valve according to a second embodiment of the present invention in different states.

[0040] Figure 21 to Figure 23 Shown are cross-sectional views of a drain valve according to a first embodiment of the present invention disposed in a shower head and in different states.

[0041] The reference numerals are described as follows:

[0042] 100. Shell

[0043] 100a, valve body

[0044] 100b, valve seat

[0045] 101. Water Inlet Channel

[0046] 102. Water outlet

[0047] 103. Drainage channel

[0048] 110. First cavity

[0049] 111. First Opening

[0050] 120. Second cavity

[0051] 121. Second Opening

[0052] 122. Energy storage chamber

[0053] 130. Guide column

[0054] 200, valve core

[0055] 210. Sealing part

[0056] 211, Water inlet end face

[0057] 220. Guide hole

[0058] 310. First seal

[0059] 320, Second sealing element

[0060] 400. Elastic parts

[0061] 510, Sealing ring

[0062] 520, Sealing ring

[0063] 610, Gap

[0064] 700, Flow Regulator

[0065] 800, moving parts

[0066] 900, Shower

[0067] 910, Drainage Hole DETAILED DESCRIPTION

[0068] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0069] like Figures 1 to 3 As shown, Figure 1 Shown is a schematic diagram of a drainage valve according to a first embodiment of the present invention from one viewing angle. Figure 2 Shown is a schematic diagram of the drain valve of the first embodiment of the present invention from another perspective. Figure 3 Shown is an exploded view of a drain valve according to a first embodiment of the present invention.

[0070] The drain valve according to the embodiment of the present invention includes: a housing 100 and a movable part 800 .

[0071] The housing 100 defines an inlet channel 101, an outlet channel 102, and a drain channel 103 that are interconnected. In a specific embodiment, the housing 100 includes a valve body 100a and a valve seat 100b, and the valve body 100a and the valve seat 100b are connected in a detachable manner, such as a snap connection or a threaded connection. The inlet channel 101 can be provided on the valve body 100a, and the outlet channel 102 and the drain channel 103 can be provided on the valve seat 100b, but the present invention is not limited thereto.

[0072] The drain valve further includes a sealing ring 510 and a sealing ring 520, which can be sleeved on the outer circumference of the valve seat 100b. When the drain valve is set in a water supply pipe, the sealing ring 510 and the sealing ring 520 are used to seal the drain valve and the pipe wall, so that water flows only through the water inlet channel 101, and does not flow along the gap between the drain valve and the pipe wall.

[0073] The movable member 800 is movably disposed in the housing 100 to selectively block the drainage channel 103. When the movable member 800 is driven by the water flow pressure to start moving and the water inlet channel 101 is not fully opened, the movable member 800 has already blocked the drainage channel 103.

[0074] The movable member 800 includes a valve core 200 , a first sealing member 310 and an elastic member 400 . The valve core 200 is movably disposed in the housing 100 and can cooperate with the first sealing member 310 , so that the first sealing member 310 can selectively block the drainage channel 103 .

[0075] The elastic member 400 is disposed in the housing 100 to provide elastic force to the valve core 200 so that it has a tendency to move toward the initial position. When the valve core 200 is driven by the water flow pressure to move from the initial position and the water inlet channel 101 is not fully opened, the first sealing member 310 has blocked the drainage channel 103.

[0076] It should be noted that the initial position of the valve core 200 can be understood as the position of the valve core 200 when the valve core 200 is not subjected to water flow pressure. When the valve core 200 is in the initial position, the first elastic member 310 does not block the drainage channel 103. At the same time, when the valve core 200 is in the initial position, the valve core 200 does not block the drainage channel 103.

[0077] Of course, it is understandable that the movable member 800 can also be made of rubber material. The movable member 800 made of rubber material can not only block the drainage channel 103, but also has elasticity, so that when the movable member 800 is not subjected to water pressure, it can return to the initial position by virtue of its own elasticity.

[0078] like Figure 4 As shown, Figure 4 The figure shows a schematic diagram of a valve body according to the first embodiment of the present invention. The valve body 100a includes a second cavity 120, one end of which is provided with a second opening 121, and the second cavity 120 is connected to the water inlet channel 101. The valve core 200 can be movably accommodated in the second cavity 120 along the axial direction of the valve body 100a through the second opening 121.

[0079] The valve body 100 a further includes a guide post 130 , which extends along the axial direction of the valve body 100 a to cooperate with the guide hole 220 of the valve core 200 to guide the movement of the valve core 200 relative to the valve body 100 a .

[0080] like Figure 5 As shown, Figure 5 The first sealing member 310 may be an annular structure, and the first sealing member 310 is sleeved on the outside of the valve core 200. When the valve core 200 moves relative to the housing 100, the first sealing member 310 can be driven to move with it.

[0081] A sealing portion 210 is disposed at one end of the valve core 200 , and the sealing portion 210 has a water inlet end surface 211 . After water flows into the water inlet channel 101 , it can rush toward the water inlet end surface 211 .

[0082] like Figure 6 and Figure 7 As shown, Figure 6 FIG. 1 is a schematic diagram of a valve seat according to a first embodiment of the present invention. Figure 7The figure shows a cross-sectional view of the valve seat of the first embodiment of the present invention. The valve seat 100b includes a first cavity 110, and the drainage channel 103 is connected to the first cavity 110. The first cavity 110 has a first opening 111. The valve core 200 is movably connected to the first cavity 110 through the first opening 111, so that the first sealing member 310 can slidably abut against the inner wall surface of the first cavity 110 to block the drainage channel 103.

[0083] like Figures 8 to 10 as well as Figure 21 to Figure 23 As shown, Figures 8 to 10 Shown are cross-sectional views of the drain valve according to the first embodiment of the present invention in different states. Figure 21 to Figure 23 Shown are cross-sectional views of a drain valve according to a first embodiment of the present invention disposed in a shower head and in different states.

[0084] like Figure 8 and Fig.21 As shown, Figure 8 The cross-sectional view of the valve core 200 of the drain valve according to the embodiment of the present invention is in the initial position. The valve body 100a and the valve seat 100b are connected to each other, and the valve core 200 is movably confined in the cavity formed by the valve body 100a and the valve seat 100b.

[0085] In one embodiment, the valve core 200 can reciprocate along the axial direction of the valve body 100a and the valve seat 100b.

[0086] The elastic member 400 may be a compression spring, which is disposed in the first cavity 110 of the valve seat 100b. One end of the elastic member 400 abuts against the valve seat 100b, and the other end abuts against the valve core 200, so that the valve core 200 has a tendency to move toward the initial position. In other words, when the water supply is stopped, the valve core 200 returns to the initial position under the action of the elastic member 400.

[0087] When the valve core 200 is in the initial position, that is, when no water flows into the water inlet channel 101, the first sealing member 310 sleeved on the outside of the valve core 200 does not slidably contact the inner wall surface of the first cavity 110, so the first sealing member 310 does not block the drainage channel 103. At this time, the water flow in the water outlet channel 102 or downstream of the water outlet channel 102 (such as the water flow in the shower head 900) will be discharged from the drainage valve (such as the shower head 900) along the drainage channel 103 under the action of siphon. Figure 8 and Fig.21 The water is discharged from the shower head 900 through the drainage hole 910 of the shower head 900. In this way, the water outlet device, such as a water nozzle of a shower head, can discharge the residual water in time without the problem of residual water dripping for a long time.

[0088] like Fig. 9 and Fig. 22 As shown, Fig. 9 The figure shows a cross-sectional view of the drain valve of the embodiment of the present invention in the water-passing instant state. The valve body 100a has a second cavity 120, which is connected to the water inlet channel 101 and has a second opening 121. The valve core 200 is movably arranged in the second cavity 120 through the second opening 121. When the sealing part 210 is arranged in the second cavity 120, there is a gap 610 between the outer peripheral surface of the sealing part 210 and the inner wall surface of the second cavity 120. Since the gap 610 is very small, a very small part of the water flow will flow through the gap 610 to the water outlet channel 102 at the moment of water passing, while a large part of the water flow will gather in the second cavity 120. Therefore, the water inlet end surface 211 of the sealing part 210 and the inner wall surface of the second cavity 120 can form an energy storage chamber 122, and the energy storage chamber 122 can accumulate the water flow pressure entering the energy storage chamber. Since the pressure in the energy storage chamber 122 is close to the static pressure state, the valve core 200 can be driven to move even under low water pressure, so that the water inlet channel 101 can be opened quickly, achieving normal operation under extremely low water pressure.

[0089] Please continue reading Fig. 9 Since the first sealing member 310 can slidably abut against the inner wall of the first cavity 110 to achieve sealing, when the valve core 200 is driven by the water flow pressure to move from the initial position and the water inlet channel 101 is not fully opened, the first sealing member 310 has already blocked the drainage channel 103. Therefore, before the water inlet channel 101 is fully opened, the drainage channel 103 is already closed, so that the water flow will not flow out of the drainage hole 910 of the shower head 900 through the drainage channel 103, so that the drainage channel 103 can be prevented from leaking under low water pressure.

[0090] like Fig.10 and Fig.23 As shown, the valve core 200 overcomes the elastic force of the elastic member 400 under the action of the accumulated pressure and moves toward the valve seat 100b to fully open the water inlet channel 101. At the same time, the first sealing member 310 slides along the inner wall of the first cavity 110 to always block the drainage channel 103.

[0091] In one embodiment, the first sealing member 310 may be a Y-shaped sealing ring. Since the Y-shaped sealing ring has a groove, when the first sealing member 310 is in slidable contact with the inner wall surface of the first cavity 110, the groove can make the Y-shaped sealing ring deform inward more easily, thereby reducing the friction between the first sealing member 310 and the inner wall surface of the first cavity 110, making the valve core 200 move more smoothly, achieving the effect of normal use even under low water pressure.

[0092] Please continue reading Fig.10The housing 100 includes a guide post 130, for example, the guide post 130 can be disposed on the valve seat 100b. The valve core 200 has a guide hole 220 that cooperates with the guide post 130. When the valve core 200 moves relative to the housing 100, the guide post 130 and the guide hole 220 can guide the movement of the valve core 200.

[0093] like Figures 11 to 17 As shown, Fig.11 Shown is a schematic diagram of a drainage valve according to a second embodiment of the present invention from one viewing angle. Fig.12 Shown is a schematic diagram of a drain valve according to a second embodiment of the present invention from another perspective. Fig.13 Shown is an exploded view of a drain valve according to a second embodiment of the present invention. Fig.14 FIG. 1 is a schematic diagram of a valve core according to a second embodiment of the present invention. Fig.15 Shown is a cross-sectional view of a valve core according to a second embodiment of the present invention. Fig.16 FIG. 1 is a schematic diagram of a valve seat according to a second embodiment of the present invention. Fig.17 Shown is a cross-sectional view of a valve seat according to a second embodiment of the present invention.

[0094] The drain valve of the second embodiment of the present invention has the same structure as the drain valve of the first embodiment and will not be described in detail. The difference is that the movable member 800 of the second embodiment of the present invention further includes a second sealing member 320. The valve core 200 can cooperate with the second sealing member 320, so that the second sealing member 320 can selectively block the water inlet channel 101.

[0095] Specifically, if Figures 13 to 15 and Figures 18 to 20 The second sealing member 320 is sleeved on the outer periphery of the valve core 200 and can move with the valve core 200. The second sealing member 320 and the first sealing member 310 are spaced apart along the axial direction of the valve core 200.

[0096] When the valve core 200 moves relative to the second cavity 120 , the second sealing member 320 can slidably abut against the inner wall surface of the second cavity 120 to selectively block the water inlet channel 101 .

[0097] like Fig.18 As shown in FIG. 1 , the valve core 200 is in the initial position under the action of the elastic member 400. At this time, the second sealing member 320 abuts against the inner wall surface of the second cavity 120, so the second sealing member 320 blocks the water inlet channel 101. At this time, the first sealing member 310 does not block the drainage channel 103. At this time, the water flow in the water outlet channel 102 or downstream of the water outlet channel 102 will be discharged from the drainage valve along the drainage channel 103 under the action of siphon (such as Fig.18In the direction indicated by the arrow in the figure), a water outlet device, such as a water nozzle of a shower head, can discharge residual water in time, and the problem of residual water dripping for a long time will not occur. At the same time, since the second sealing member 320 is blocked in the water inlet channel 101, the residual water will not flow back from the water inlet channel 101 to the water supply pipeline, thereby achieving an anti-siphon effect.

[0098] like Fig.19 As shown, at the moment of water flow, since the second sealing member 320 abuts against the inner wall of the second cavity 120, the water inlet end face 211 and the inner wall of the second cavity 120 can form an energy storage chamber 122, and the energy storage chamber 122 can accumulate the water flow pressure entering the energy storage chamber. Since the pressure in the energy storage chamber 122 is close to the static pressure state, the valve core 200 can be driven to move even in a low water pressure state, so that the water inlet channel 101 can be quickly opened, and normal operation can be achieved under extremely low water pressure.

[0099] Since the first sealing member 310 can slidably abut against the inner wall surface of the first cavity 110 to achieve sealing, when the valve core 200 is driven by the water flow pressure to move from the initial position and the water inlet channel 101 is not fully opened, the first sealing member 310 has already blocked the drainage channel 103. Therefore, before the water inlet channel 101 is fully opened, the drainage channel 103 is already closed, so that water leakage of the drainage channel 103 under low water pressure can be avoided.

[0100] As described above, the first sealing member 310 and the second sealing member 320 can respectively abut against the inner wall surface of the first cavity 110 and the inner wall surface of the second cavity 120, so that the water inlet channel 101 and the drainage channel 103 are always in a disconnected state, preventing the drainage channel 103 from leaking under low water pressure.

[0101] like Fig. 20 As shown, after continuous water flow, the valve core 200 overcomes the elastic force of the elastic member 400 under the action of the accumulated pressure and moves toward the valve seat 100b to fully open the water inlet channel 101. At the same time, the first sealing member 310 slides along the inner wall of the first cavity 110 to always block the drainage channel 103.

[0102] In one embodiment, the second sealing member 320 may be a Y-shaped sealing ring. Since the Y-shaped sealing ring has a groove, when the second sealing member 320 is in slidable contact with the inner wall surface of the second cavity 120, the groove can make the Y-shaped sealing ring deform inward more easily, thereby reducing the friction between the second sealing member 320 and the inner wall surface of the second cavity 120, making the valve core 200 move more smoothly, achieving the effect of normal use even under low water pressure.

[0103] like Fig.11 and Fig.13As shown, the drain valve further includes a flow regulator 700. The flow regulator 700 can be installed on the valve body 100a and located upstream of the water inlet channel 101. The drain valve of the embodiment of the present invention can select a suitable flow regulator 700 according to the water flow rate in different regions. In addition to the advantages of timely discharge of residual water and backflow prevention of the drain valve of the embodiment of the present invention described above, it also has the function of flow control.

[0104] The present invention further provides a water outlet device, comprising the drain valve of any of the above embodiments. Therefore, the water outlet device of the embodiment of the present invention has all the advantages and beneficial effects of any of the above embodiments, which will not be repeated here.

[0105] In one embodiment, the water outlet device may be a shower head.

[0106] In summary, the advantages and beneficial effects of the drain valve and water outlet device of the embodiment of the present invention are:

[0107] When the valve core 200 is driven by the water pressure to move from the initial position and the water inlet channel 101 is not fully opened, the first sealing member 310 has already blocked the drainage channel 103. Therefore, before the water inlet channel 101 is fully opened, the drainage channel 103 is already closed, so the problem of water leakage in the drainage channel 103 under low water pressure can be avoided.

[0108] In the embodiments of the invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the invention can be understood according to the specific circumstances.

[0109] In the description of the embodiments of the invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the invention.

[0110] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above are only preferred embodiments of the invention embodiments, and are not intended to limit the invention embodiments. For those skilled in the art, the invention embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention embodiments shall be included in the protection scope of the invention embodiments.

Claims

1. A drain valve, characterized in that: include: A shell (100) defines a water inlet channel (101), a water outlet channel (102), and a water discharge channel (103) that are interconnected; the shell (100) has a second cavity (120), the second cavity (120) is connected to the water inlet channel (101), and has a second opening (121); as well as a movable member (800) movably arranged in the housing (100), the movable member (800) comprising a valve core (200) and an elastic member (400); the valve core (200) is movably arranged in the second cavity (120) through the second opening (121), and can cooperate with a first sealing member (310), so that the first sealing member (310) can selectively block the drainage channel (103); the elastic member (400) is arranged in the housing (100) to provide elastic force to the valve core (200), so that the valve core (200) has a tendency to move toward an initial position; wherein, when the valve core (200) is not subjected to water flow pressure, the valve core (200) is in the initial position; Wherein, when the movable member (800) is driven by the water flow pressure to start moving, and the water inlet channel (101) is not fully opened, the movable member (800) has blocked the drainage channel (103); When part of the valve core (200) is disposed in the second cavity (120), a water inlet end surface (211) of the valve core (200) and an inner wall surface of the second cavity (120) form an energy storage cavity (122) to accumulate water flow pressure entering the energy storage cavity (122).

2. The drain valve according to claim 1, characterized in that: The first sealing member (310) is an annular structure, is sleeved on the outer circumference of the valve core (200), and is capable of moving along with the valve core (200).

3. The drain valve according to claim 2, characterized in that: The housing (100) has a first cavity (110), the first cavity (110) is in communication with the drainage channel (103) and has a first opening (111); The valve core (200) is movably disposed in the first cavity (110) through the first opening (111), so that the first sealing member (310) can slidably abut against the inner wall surface of the first cavity (110) to seal the drainage channel (103).

4. The drain valve according to claim 3, characterized in that: The first sealing member (310) is a Y-shaped sealing ring.

5. The drain valve according to claim 1, characterized in that: The valve core (200) is provided with a sealing portion (210), and a gap is formed between the outer peripheral surface of the sealing portion (210) and the inner wall surface of the second cavity (120).

6. The drain valve according to claim 1, characterized in that: The movable member (800) further comprises a second sealing member (320), wherein the second sealing member (320) is sleeved on the outer periphery of the valve core (200) and is capable of moving along with the valve core (200); When the valve core (200) moves relative to the second cavity (120), the second sealing member (320) can slidably abut against the inner wall surface of the second cavity (120) to selectively block the water inlet channel (101).

7. The drain valve according to claim 6, characterized in that: The second sealing member (320) is a Y-shaped sealing ring.

8. The drain valve according to claim 1, characterized in that: The housing (100) comprises a guide column (130), and the valve core (200) has a guide hole (220) that matches the guide column (130).

9. A water outlet device, characterized in that: Comprising a drain valve as claimed in any one of claims 1 to 8.

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