JP2022184815A - Drain valve and water discharge device - Google Patents

Abstract

The present invention solves the problem of residual water dripping from a shower head.
A drain valve includes a case defining a water inlet passage, a water discharge passage, and a drain passage communicating with each other, and a movable member movably provided in the case for selectively closing the drain passage. . Here, when the movable member starts to move due to the pressure of the water flow and the water inlet passage is not completely opened, the movable member already blocks the drainage passage.
[Selection drawing] Fig. 9

Description

TECHNICAL FIELD The present invention relates to the technical field of drain valves, and more particularly to a drain valve and a water discharge device including this drain valve.

After using the showerhead, the valve on the water pipe is usually closed to stop water supply to the showerhead. However, at the moment of closing the valve, there is still water inside the showerhead, and this remaining water slowly drips out of the showerhead, affecting the using experience.

In order to solve the problem of residual water dripping from the shower head, related technologies mainly include automatic drainage, in which residual water is discharged through the drainage channel when the water supply is stopped by providing a drainage channel. A drain valve capable of However, when passing water through the drain valve, there is a possibility that the water flow will flow out of the drain passage, and there is a problem of water leakage.

Embodiments of the present invention provide a drain valve that can avoid water leakage.

An embodiment of the present invention further provides a water discharge device including the above drain valve.

A drain valve according to an embodiment of the present invention includes a case that defines a water inlet passage, a water discharge passage, and a water discharge passage that communicate with each other, and a movable valve that is movably provided in the case and selectively closes the water discharge passage. and a member, wherein when the movable member starts to move under the pressure of the water flow and the water inlet passage is not completely open, the movable member already blocks the drain passage.

According to some embodiments of the invention, the movable member is movably mounted within the case such that the first seal member selectively blocks the drain passageway, and a first seal member and a resilient member provided within the case for imparting a resilient force to the valve core so as to tend to move the valve core to an initial position, wherein: When the valve stem is not under the pressure of water flow, the valve stem is in the initial position.

According to some embodiments of the present invention, the first sealing member has an annular structure and can be fitted around the outer periphery of the valve core and move with the valve core.

According to some embodiments of the invention, the case has a first cavity, which communicates with the drainage passage and has a first opening.

Since the valve core is movably provided in the first cavity through the first opening, the drainage can be achieved by slidably contacting the first sealing member against the inner wall surface of the first cavity. It realizes blocking the passage.

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

According to some embodiments of the invention, the case has a second cavity, which communicates with the water inlet passage and has a second opening.

The valve core is movably provided in the second cavity through the second opening.

Here, when a part of the valve core is provided in the second cavity, the water inlet end surface of the valve core is located between the inner wall surface of the second cavity and the energy storage chamber for accumulating the pressure of the water flow entering the energy storage chamber. to form an energy storage chamber.

According to some embodiments of the present invention, the valve core is provided with a seal portion, and has a gap between the outer peripheral surface of the seal portion and the inner wall surface of the second cavity.

According to some embodiments of the present invention, the movable member further includes a second sealing member, and the second sealing member is fitted around the outer periphery of the valve core and attached to the valve core. can move.

When the valve core moves with respect to the second cavity, the second seal member slidably contacts the inner wall surface of the second cavity to selectively close the water inlet passage. come true.

According to some embodiments of the invention, said second sealing member is a Y-shaped sealing ring.

According to some embodiments of the present invention, the case includes a guide post, and the valve core has a guide hole fitted to the guide post.

A water discharging device according to an embodiment of the present invention includes the drain valve described above.

One embodiment of the invention described above has at least the following advantages or beneficial effects.

According to the drain valve and water discharge device according to the embodiment of the present invention, when the movable member starts to move due to the pressure of the water flow and the water inlet passage is not completely opened, the movable member already closes the drain passage. Therefore, since the drain passage is already closed before the water inlet passage is not fully opened, the water flow cannot flow out from the drain passage, avoiding the problem of water leaking from the drain passage at low water pressure. be able to.

Exemplary embodiments will be described in detail with reference to the drawings, and the above and other features and advantages of the present invention will become clearer.
1 is a schematic view from one angle of a drain valve according to a first embodiment of the present invention; FIG. FIG. 4 is a schematic view of the drain valve according to the first embodiment of the present invention from another angle; 1 is an exploded view of a drain valve according to a first embodiment of the present invention; FIG. 1 is a schematic diagram of a valve body according to a first embodiment of the present invention; FIG. 1 is a schematic diagram of a valve core according to a first embodiment of the present invention; FIG. 1 is a schematic diagram of a valve seat according to a first embodiment of the present invention; FIG. 1 is a cross-sectional view of a valve seat according to a first embodiment of the present invention; FIG. FIG. 4 is a cross-sectional view of the drain valve in different states according to the first embodiment of the present invention; FIG. 4 is a cross-sectional view of the drain valve in different states according to the first embodiment of the present invention; FIG. 4 is a cross-sectional view of the drain valve in different states according to the first embodiment of the present invention; FIG. 4 is a schematic view from one angle of the drain valve according to the second embodiment of the present invention; FIG. 8 is a schematic view of the drain valve according to the second embodiment of the present invention from another angle; FIG. 5 is an exploded view of a drain valve according to a second embodiment of the present invention; FIG. 4 is a schematic diagram of a valve core according to a second embodiment of the present invention; FIG. 4 is a cross-sectional view of a valve core according to a second embodiment of the present invention; FIG. 5 is a schematic diagram of a valve seat according to a second embodiment of the present invention; FIG. 5 is a cross-sectional view of a valve seat according to a second embodiment of the present invention; FIG. 8 is a cross-sectional view of the drain valve in different states according to the second embodiment of the present invention; FIG. 8 is a cross-sectional view of the drain valve in different states according to the second embodiment of the present invention; FIG. 8 is a cross-sectional view of the drain valve in different states according to the second embodiment of the present invention; FIG. 4 is a cross-sectional view of the drain valve installed in the showerhead according to the first embodiment of the present invention and the drain valve in different states; FIG. 4 is a cross-sectional view of the drain valve installed in the showerhead according to the first embodiment of the present invention and the drain valve in different states; FIG. 4 is a cross-sectional view of the drain valve installed in the showerhead according to the first embodiment of the present invention and the drain valve in different states;

Exemplary embodiments are described more fully below with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and are not limited to the embodiments set forth herein. Rather, it is the provision of these embodiments that conveys the completeness and completeness of the invention and the spirit of the exemplary embodiments to those skilled in the art. The same reference numbers in the drawings indicate the same or similar elements, and thus detailed descriptions thereof are omitted.

As shown in FIGS. 1-3, FIG. 1 shows a schematic view from one angle of a drain valve according to a first embodiment of the present invention. FIG. 2 shows a schematic view from another angle of the drain valve according to the first embodiment of the present invention. FIG. 3 shows an exploded view of the drain valve according to the first embodiment of the invention.

A drain valve according to an embodiment of the invention includes a case 100 and a movable member 800 .

The case 100 defines a water inlet passage 101, a water discharge passage 102 and a drainage passage 103 that communicate with each other. In one specific embodiment, the case 100 includes a valve body 100a and a valve seat 100b, which are connected in a detachable manner, such as a snap connection or a screw connection. be done. The water inlet passage 101 may be provided in the valve body 100a, and the water discharge passage 102 and the water discharge passage 103 may be provided in the valve seat 100b, but they are not limited to this.

The drain valve further includes a seal ring 510 and a seal ring 520, and the seal ring 510 and the seal ring 520 may be fitted around the outer periphery of the valve seat 100b. When the drain valve is provided in the water supply pipe, the seal ring 510 and the seal ring 520 seal the drain valve and the pipe wall so that the water flow passes only through the water inlet passage 101 but not between the drain valve and the pipe wall. It cannot flow through gaps.

The movable member 800 is movably provided within the case 100 and is for selectively blocking the drain passage 103 . When the movable member 800 starts to move due to the pressure of the water flow and the water inlet passage 101 is not completely opened, the movable member 800 already blocks the drainage passage 103 .

The movable member 800 includes the valve core 200 , the first sealing member 310 and the elastic member 400 . The valve core 200 is movably provided within the case 100 and fitted to the first seal member 310 , whereby the first seal member 310 selectively closes the drain passage 103 .

The elastic member 400 is provided within the case 100 and is for providing an elastic force to the valve core 200 so that the valve core 200 tends to move to the initial position. Here, when the valve core 200 is moved from the initial position by the pressure of the water flow and the water inlet passage 101 is not completely opened, the first sealing member 310 already closes the drainage passage 103 .

It should be noted that the initial position of the valve stem 200 can be understood as the position where the valve stem 200 is located when the valve stem 200 is not under the pressure of the water flow. When the valve core 200 is in the initial position, the first elastic member 310 does not block the drainage passage 103 . At the same time, when the valve core 200 is in the initial position, the valve core 200 does not block the drain passage 103 .

Of course, it can be appreciated that the movable member 800 may be manufactured from a rubber material. The movable member 800 made of a rubber material has the effect of closing the drainage passage 103 and can have elasticity itself. It can return to the initial position.

As shown in FIG. 4, FIG. 4 shows a schematic diagram of the valve body according to the first embodiment of the present invention. The valve body 100 a includes a second cavity 120 , a second opening 121 is provided at one end of the second cavity 120 , and the second cavity 120 communicates with the water inlet passage 101 . The valve core 200 can be movably accommodated in the second cavity 120 through the second opening 121 along the axial direction of the valve body 100a.

The valve body 100a further includes a guide post 130, which extends along the axial direction of the valve body 100a and is fitted into the guide hole 220 of the valve core 200 so that the valve core 200 is aligned with the valve body 100a. It is meant to guide you as you move around.

As shown in FIG. 5, FIG. 5 shows a schematic diagram of the valve core according to the first embodiment of the present invention. The first sealing member 310 may have an annular structure, and the first sealing member 310 is fitted on the outside of the valve core 200 . When the valve core 200 moves with respect to the case 100, the first sealing member 310 can move accordingly.

One end of the valve core 200 is provided with a seal portion 210 having a water inlet end surface 211 . After entering the water inlet channel 101 , the water flow can be swept to the water inlet end surface 211 .

As shown in FIGS. 6 and 7, FIG. 6 shows a schematic diagram of the valve seat according to the first embodiment of the present invention. FIG. 7 shows a cross-sectional view of a valve seat according to a first embodiment of the invention. The valve seat 100b includes a first cavity 110, and the drain passage 103 communicates with the first cavity 110. As shown in FIG. 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 seal member 310 is slidably abutted against the inner wall surface of the first cavity 110 to form the drainage passage. 103 is realized.

As shown in FIGS. 8-10 and 21-23, FIGS. 8-10 show cross-sectional views of the drain valve in different states according to the first embodiment of the present invention. 21 to 23 show cross-sectional views when the drain valve according to the first embodiment of the present invention is installed in the showerhead and the drain valve is in different states.

As shown in FIGS. 8 and 21, FIG. 8 shows a cross-sectional view of the valve core 200 of the drain valve according to the embodiment of the present invention in its initial position. The valve body 100a and the valve seat 100b are connected together and movably confine the valve core 200 within the cavity formed by the valve body 100a and the valve seat 100b.

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

A resilient member 400, which may be a compression spring, is provided within 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, whereby the valve core 200 tends to move to the initial position. In other words, when stopping the water supply, the valve core 200 is returned to the initial position by the elastic member 400 .

When the valve core 200 is in the initial position, that is, when water is not flowing through the water inlet passage 101 , the first sealing member 310 fitted on the outside of the valve core 200 slides on the inner wall surface of the first cavity 110 . Since no contact is possible, the first sealing member 310 does not block the drainage passage 103 . At this time, the water flow located in the water discharge passage 102 or downstream of the water discharge passage 102 (for example, the water flow in the shower head 900) flows along the water discharge passage 103 by siphon action to the drain valve (see FIGS. 8 and 21). The shower head 900 is discharged from the drain hole 910 of the shower head 900 by discharging from the direction indicated by the arrow). Thereby, the water discharge device, for example, the nozzle of the shower head, can discharge the remaining water in real time, so there is no problem of the remaining water dripping for a long time.

As shown in FIGS. 9 and 22, FIG. 9 shows a cross-sectional view of the drain valve according to the embodiment of the present invention at the moment of water flow. The valve body 100 a has a second cavity 120 , which communicates with the water inlet passage 101 and has a second opening 121 . The valve core 200 is movably provided in the second cavity 120 through the second opening 121 . Here, when the seal portion 210 is provided inside the second cavity 120 , there is a gap 610 between the outer peripheral surface of the seal portion 210 and the inner wall surface of the second cavity 120 . Since the gap 610 is small, a small part of the water flow flows through the gap 610 to the water discharge passage 102 at the moment of water flow, but most of the water flow accumulates in the second cavity 120 . Therefore, the water inlet end surface 211 of the seal portion 210 and the inner wall surface of the second cavity 120 can form an energy storage chamber 122, which absorbs the pressure of the water flow entering the energy storage chamber. can be accumulated. Since the pressure in the energy storage chamber 122 approximates a static pressure state, the valve core 200 is driven and moved even in a low water pressure state, and the water inlet passage 101 is quickly opened, enabling normal operation even at extremely low water pressure. do.

Continuing to refer to FIG. 9, the first sealing member 310 can slidably abut against the inner wall surface of the first cavity 110 to achieve sealing, so that the valve core 200 is displaced from the initial position by the pressure of the water flow. And if the water inlet passage 101 is not completely opened, the first sealing member 310 already blocks the water discharge passage 103 . Therefore, since the drain passage 103 is already closed before the water inlet passage 101 is completely opened, the water flow cannot pass through the drain passage 103 and flow out from the drain hole 910 of the shower head 900. Leakage of water from the drainage passage 103 due to water pressure can be avoided.

As shown in FIGS. 10 and 23, the valve core 200 is moved to the valve seat 100b against the elastic force of the elastic member 400 by the accumulated pressure, thereby completely opening the water inlet passage 101. As shown in FIGS. At the same time, the first seal member 310 slides along the inner wall surface of the first cavity 110 to always block the drainage passage 103 .

In one embodiment, the first sealing member 310 may be a Y-shaped sealing ring. Since the Y-shaped seal ring has a groove, when the first seal member 310 slidably contacts the inner wall surface of the first cavity 110, the groove makes it easier for the Y-shaped seal ring to deform inward. , the frictional force between the first sealing member 310 and the inner wall surface of the first cavity 110 can be reduced, the valve core 200 can be moved more smoothly, and the effect of being able to be used normally even at low water pressure can be achieved.

With continued reference to FIG. 10, the case 100 includes a guide post 130, for example, the guide post 130 may be provided on the valve seat 100b. The valve core 200 has a guide hole 220 that fits into the guide column 130 . When the valve core 200 moves with respect to the case 100 , the guide column 130 and the guide hole 220 can guide the movement of the valve core 200 .

As shown in FIGS. 11-17, FIG. 11 shows a schematic view from one angle of a drain valve according to a second embodiment of the present invention. FIG. 12 shows a schematic view from another angle of the drain valve according to the second embodiment of the present invention. FIG. 13 shows an exploded view of a drain valve according to a second embodiment of the invention. FIG. 14 shows a schematic diagram of a valve core according to a second embodiment of the present invention. FIG. 15 shows a cross-sectional view of a valve core according to a second embodiment of the present invention. FIG. 16 shows a schematic diagram of a valve seat according to a second embodiment of the present invention. FIG. 17 shows a cross-sectional view of a valve seat according to a second embodiment of the invention.

The drain valve according to the second embodiment of the present invention and the drain valve according to the first embodiment of the present invention will not be described in detail with respect to their same structures, and the movable member 800 according to the second embodiment of the present invention is the second seal. It differs by further including a member 320 . The valve core 200 can be fitted to the second sealing member 320 such that the second sealing member 320 selectively blocks the water inlet passage 101 .

Specifically, as shown in FIGS. 13 to 15 and 18 to 20, the second seal member 320 is fitted around the outer periphery of the valve core 200 and can move along with the valve core 200. . The second sealing member 320 and the first sealing member 310 are provided at intervals along the axial direction of the valve core 200 .

When the valve core 200 moves relative to the second cavity 120, the second sealing member 320 slidably abuts against the inner wall surface of the second cavity 120, thereby selectively closing the water inlet passage 101. do.

As shown in FIG. 18, the valve core 200 is positioned at the initial position by the elastic member 400 . At this time, the second seal member 320 abuts against the inner wall surface of the second cavity 120 , so that the second seal member 320 blocks the water inlet passage 101 . At this time, the first seal member 310 does not block the drain passage 103 . At this time, the water flow located in the water discharge passage 102 and downstream of the water discharge passage 102 is discharged from the drain valve (in the direction indicated by the arrow in FIG. 18) along the water discharge passage 103 by siphon action. Since the residual water can be discharged from the nozzle of the device, for example, the shower head in real time, there is no problem of residual water dripping for a long time. At the same time, since the second seal member 320 closes the water inlet passage 101, the remaining water cannot flow back from the water inlet passage 101 to the water supply pipe passage, thereby exhibiting a siphon prevention effect.

As shown in FIG. 19, the second sealing member 320 abuts against the inner wall surface of the second cavity 120 at the moment of water flow, so that the water inlet end surface 211 and the inner wall surface of the second cavity 120 enter the energy storage chamber. An energy storage chamber 122 can be formed in which the pressure of the water stream can be stored. Since the pressure in the energy storage chamber 122 approximates a static pressure state, the valve core 200 is driven to move even in a low water pressure state, and the water inlet passage 101 is quickly opened, enabling normal operation even at extremely low water pressure. do.

The first sealing member 310 can slidably contact the inner wall surface of the first cavity 110 to achieve sealing, so that the valve core 200 is moved from the initial position by the pressure of the water flow and the water inlet passage 101 is completely closed. If not open, the first sealing member 310 already blocks the drain passage 103 . Therefore, since the drain passage 103 is already closed before the water inlet passage 101 is completely opened, it is possible to avoid water leakage from the drain passage 103 due to low water pressure.

As described above, the first sealing member 310 and the second sealing member 320 can contact the inner wall surface of the first cavity 110 and the inner wall surface of the second cavity 120, respectively, so that the water inlet passage 101 and the drainage passage 103 are always in communication. It is in a state where it does not work, and prevents water from leaking from the drain passage 103 at low water pressure.

As shown in FIG. 20, after water continues to flow, the valve core 200 moves toward the valve seat 100b against the elastic force of the elastic member 400 due to the accumulated pressure, thereby completely opening the water inlet passage 101. be done. At the same time, the first seal member 310 slides along the inner wall surface of the first cavity 110 to always block the drainage passage 103 .

In one embodiment, the second sealing member 320 may be a Y-shaped sealing ring. Since the Y-shaped seal ring has a groove, when the second seal member 320 slidably contacts the inner wall surface of the second cavity 120, the groove makes it easier for the Y-shaped seal ring to deform inward. , the frictional force between the second sealing member 320 and the inner wall surface of the second cavity 120 can be reduced, the valve core 200 can be moved more smoothly, and the effect of being able to be used normally even at low water pressure can be achieved.

The drain valve further includes a flow regulator 700, as shown in FIGS. A flow regulator 700 can be attached to the valve body 100 a and located upstream of the water inlet passage 101 . The drain valve according to the embodiment of the present invention can select an appropriate flow controller 700 according to the water flow rate of each region. As explained above, the drain valve according to the embodiment of the present invention has the function of controlling the flow rate in addition to the advantage of timely draining remaining water to prevent backflow.

The present invention further provides a water discharge device including a drain valve according to any of the above embodiments, so that the water discharge device according to the embodiments of the present invention has all the advantages and benefits of any of the above embodiments. Although it has an effect, detailed description is omitted here.

In one embodiment, the water discharging device may be a showerhead.

As noted above, advantages and beneficial effects of drain valves and water discharge devices according to embodiments of the present invention are as follows.

When the valve core 200 is moved from the initial position by the pressure of the water flow and the water inlet passage 101 is not completely opened, the first sealing member 310 already closes the drain passage 103 . Therefore, since the drain passage 103 is already closed before the water inlet passage 101 is completely opened, the problem of water leaking from the drain passage 103 due to low water pressure can be avoided.

In the embodiments of the present invention, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. Unless expressly specified otherwise, the term "plurality" refers to two or more. Any terms such as "attached", "connected to", "connected", "fixed" should be understood broadly. For example, a "connection" may be a fixed connection, a detachable connection, or an integral connection. “Connected to” may be directly connected or indirectly connected via an intermediate medium. A person skilled in the art can understand the specific definitions of the above terms in the embodiments of the present invention according to the specific situation.

In the description of the embodiments of the present invention, the directions or positional relationships indicated by the terms "top", "bottom", "left", "right", "front", "back" etc. are the directions shown in the drawings. or positional relationship, merely to facilitate simplification of the embodiment and description of the invention, and indicated devices or units have particular orientations and are configured and operated in particular orientations. It is not intended to indicate or imply that it is necessary to do so and should not be taken as a limitation to the embodiments of the invention.

In the description herein, the terms "one embodiment," "some embodiments," "specific embodiments," and other descriptions refer to particular features, structures, Any combination of materials or features is meant to be included in at least one embodiment or example of embodiments of the present invention. As used herein, generalized representations of terms do not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred examples of the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. may Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the embodiments of the present invention should fall within the protection scope of the embodiments of the present invention.

100, case; 100a, valve body; 100b, valve seat; 101, water inlet passage; 102, water discharge passage; 103, drainage passage; 2 opening; 122, energy storage chamber; 130, guide column; 200, valve core; 210, seal portion; 211, water inlet end face; Elastic member; 510, seal ring; 520, seal ring; 610, gap; 700, flow controller; 800, movable member; 900, shower head;

Claims (11)

a case (100) defining a water inlet passage (101), a water discharge passage (102) and a drainage passage (103) communicating with each other;
a movable member (800) movably provided in the case (100) for selectively closing the drainage passage (103);
When the movable member (800) starts to move due to the pressure of water flow and the water inlet passage (101) is not completely opened, the movable member (800) already blocks the drain passage (103). A drain valve characterized by: The movable member (800) is
A first sealing member (310) is movably provided within the case (100) and fitted to the first sealing member (310) so as to selectively close the drainage passage (103). a valve core (200);
a resilient member (400) provided within the case (100) for imparting a resilient force to the valve stem (200) so that the valve stem (200) tends to move to an initial position;
The drain valve of claim 1, wherein the valve stem (200) is in the initial position when the valve stem (200) is not under the pressure of a water stream. The first sealing member (310) has an annular structure, is fitted around the outer circumference of the valve core (200), and can move along with the valve core (200). 2. The drain valve according to 2. The case (100) has a first cavity (110), the first cavity (110) communicates with the drainage passage (103), and has a first opening (111),
The valve core (200) is movably provided in the first cavity (110) through the first opening (111), so that the first sealing member (310) is placed in the first cavity (110). 4. The drain valve according to claim 3, wherein said drain passage (103) is closed by slidably coming into contact with the inner wall surface of the drain valve. 5. The drain valve of claim 4, wherein the first sealing member (310) is a Y-shaped sealing ring. The case (100) has a second cavity (120), the second cavity (120) communicates with the water inlet passage (101), and has a second opening (121),
The valve core (200) is movably provided in the second cavity (120) through the second opening (121),
When a portion of the valve core (200) is provided in the second cavity (120), the water inlet end surface (211) of the valve core (200) is aligned with the inner wall surface of the second cavity (120) for energy storage. 3. A drain valve according to claim 2, characterized in that it forms said energy storage chamber (122) for storing the pressure of the water flow entering the chamber (122). The valve core (200) is provided with a seal portion (210), and a gap is provided between the outer peripheral surface of the seal portion (210) and the inner wall surface of the second cavity (120). A drain valve according to claim 6. The movable member (800) further includes a second sealing member (320), which is fitted around the outer circumference of the valve core (200) and is attached to the valve core (200). can move with
When the valve core (200) moves with respect to the second cavity (120), the second seal member (320) slidably contacts the inner wall surface of the second cavity (120), 7. A drain valve according to claim 6, characterized in that it provides for selectively blocking the water inlet passage (101). The drain valve of claim 8, wherein said second sealing member (320) is a Y-shaped sealing ring. 3. The valve according to claim 2, wherein the case (100) includes a guide post (130), and the valve core (200) has a guide hole (220) fitted to the guide post (130). Drain valve as described. A water discharger including the drain valve according to any one of claims 1 to 10.

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