Method for stopping water immediately after closing water and water outlet device

Abstract

The method is applied to a water outlet device, a variable watertight cavity and a variable water passing cavity are formed in the water outlet device, the variable watertight cavity is sealed and isolated from the variable water passing cavity through a valve body driven by water pressure, and the variable watertight cavity is communicated with the atmosphere; the method comprises the steps that the valve body is driven by water pressure, so that the size of the variable non-water-passing cavity is increased and decreased in the water passing state, and the size of the variable non-water-passing cavity is decreased and increased in the water closing state to form a negative pressure cavity. The invention further provides a water outlet device which adopts the method.

Description

TECHNICAL FIELD

[0001] The present application relates to a household product, in particular to a water outlet device. BACKGROUND

[0002] Some shower heads in the prior art have a movable plate arranged in the body and movable up and down in the cavity and used for sealing the water outlet hole, which forms a pressure cavity with the water outlet panel, when the shower is turned on and the buoyancy of the water in the pressure cavity is enough to lift the movable plate, the shower is turned on; when the shower is turned off, the buoyancy of the water in the pressure cavity decreases rapidly, so that the movable plate seals the water outlet hole again, the shower is turned off, and the effect of preventing dripping after showering is achieved. Since the movable plate has a certain weight, it needs to be lifted, and the water needs to be pressurized in the pressure cavity for a period of time before the shower is actually turned on, so that the water pressure is high and the water is delayed. SUMMARY

[0003] The main technical problem to be solved by the present application is to provide a water-off method that is sensitive and has less delay.

[0004] To solve the above technical problems, the present application provides a water-off method applied to a water outlet device, wherein the water outlet device is provided with a variable non-water cavity and a variable water cavity, the variable non-water cavity is sealed and isolated from the variable water cavity by a valve body driven by water pressure, and the variable non-water cavity is connected to the atmosphere.

[0005] The method comprises the steps of using the valve body driven by water pressure to increase the volume of the variable non-water cavity and reduce the volume of the variable water cavity in the water-on state, and reducing the volume of the variable non-water cavity and increasing the volume of the variable water cavity to form a negative pressure cavity in the water-off state.

[0006] The present application also provides a water-off method applied to a water outlet device, wherein the water outlet device is provided with a variable non-water cavity and a variable water cavity, the variable non-water cavity is sealed and isolated from the variable water cavity by a valve body driven by water pressure, and the variable non-water cavity is connected to the atmosphere.

[0007] The method comprises the steps of using the valve body driven by water pressure to increase the volume of the variable non-water cavity and reduce the volume of the variable water cavity in the water-on state, and reducing the volume of the variable non-water cavity and increasing the volume of the variable water cavity to form a negative pressure cavity in the water-off state.

[0008] The application also provides a method for stopping water supply, which is applied to a water outlet device, wherein a variable non-water supply cavity and a variable water supply cavity are arranged in the water outlet device; the variable non-water supply cavity is sealed and isolated from the variable water supply cavity by a valve body driven by water pressure, and the variable non-water supply cavity is connected to the atmosphere; the method comprises using the valve body to be in different positions in water supply and water stopping states, so that the volume of the variable water supply cavity is reduced in water supply and increased in water stopping to form a negative pressure cavity.

[0009] The application also provides a method for stopping water supply, which is applied to a water outlet device, wherein a variable non-water supply cavity and a variable water supply cavity are arranged in the water outlet device; the variable non-water supply cavity is sealed and isolated from the variable water supply cavity by a valve body driven by water pressure, and the variable non-water supply cavity is connected to the atmosphere; the method comprises using the valve body to be in different positions in water supply and water stopping states, so that the volume of the variable water supply cavity is reduced in water supply and increased in water stopping to absorb residual water of a water outlet hole into the variable water supply cavity.

[0010] The application also provides a method for stopping water supply, which is applied to a water outlet device, wherein a variable non-water supply cavity and a variable water supply cavity are arranged in the water outlet device; the variable non-water supply cavity is sealed and isolated from the variable water supply cavity by a valve body driven by water pressure, and the variable non-water supply cavity is connected to the atmosphere; the volume of the variable water supply cavity is not equal in water supply and water stopping states, so that the variable water supply cavity forms a negative pressure cavity in water stopping.

[0011] The application also provides a method for stopping water supply, which is applied to a water outlet device, wherein a variable non-water supply cavity and a variable water supply cavity are arranged in the water outlet device; the variable non-water supply cavity is sealed and isolated from the variable water supply cavity by a valve body driven by water pressure, and the variable non-water supply cavity is connected to the atmosphere; the volume of the variable water supply cavity is not equal in water supply and water stopping states, so that the volume of the variable water supply cavity is increased in water stopping to absorb residual water of a water outlet hole into the variable water supply cavity.

[0012] The application also provides a water outlet device, wherein a variable non-water supply cavity and a variable water supply cavity are arranged in the water outlet device; the variable non-water supply cavity is sealed and isolated from the variable water supply cavity by a valve body driven by water pressure, and the variable non-water supply cavity is connected to the atmosphere; the variable water supply cavity is connected to a water outlet hole of the water outlet device.

[0013] The valve body is driven by water pressure to move from a first position to a second position and compress the volume of the variable water supply cavity in water supply; the valve body moves from the second position to the first position and compresses the volume of the variable non-water supply cavity in water stopping, so that the volume of the variable water supply cavity is increased to form a negative pressure cavity.

[0014] In a preferred embodiment: a valve seat is provided in the variable flow chamber, and the valve seat is connected to the valve body through a return spring; during the process of the valve body moving from the first position to the second position, the return spring is compressed to accumulate elastic return force.

[0015] In a preferred embodiment: the valve body can form a cavity with the valve seat during the process of moving from the first position to the second position or when the valve body is in the second position; a one-way valve is provided on the valve seat at the position corresponding to the cavity; when the valve body moves in the direction of decreasing cavity volume, the one-way valve opens to connect the variable flow water cavity; when the valve body moves in the direction of increasing cavity volume or when the valve body does not move, the one-way valve closes.

[0016] In a preferred embodiment: the valve seat is further provided with a duckbill valve port; when the volume of the cavity decreases, the duckbill valve port is closed; when the volume of the cavity increases, the duckbill valve port is opened and connected to the atmosphere or a variable water cavity.

[0017] In a preferred embodiment: a Y-shaped sealing ring is provided on the side of the valve seat, and the valve body fits and splices with the Y-shaped sealing ring to form the cavity during the process of moving from the first position to the second position or when it is in the second position.

[0018] In a preferred embodiment: the area S3 of the Y-shaped sealing ring is greater than or equal to the cross-sectional area S2 of the variable non-flowing cavity, and less than the cross-sectional area S1 of the part of the valve body where the variable flowing cavity is located.

[0019] In a preferred embodiment: the cross-sectional area S1 of the variable water passage cavity corresponding to the movement range of the valve body and the cross-sectional area S4 of the part corresponding to the variable non-flow cavity are respectively larger than the cross-sectional area S2 of the valve body and the variable non-flow cavity; so that when the valve body is in the second position, a water passage is formed between the side of the valve body, the side of the variable non-flow cavity and the inner wall of the variable water passage cavity.

[0020] The valve body is provided with a water passage hole that connects the water passage channel to the variable flow chamber.

[0021] In a preferred embodiment: a sealing gasket is provided on the water outlet, and a cutting slit is provided on the sealing gasket; when water is flowing, the water pressure acts on the sealing gasket to open the cutting slit; when water is turned off, the negative pressure of the variable water passage cavity closes the cutting slit.

[0022] In a preferred embodiment: the water outlet device includes a cover, on which the water outlet hole and a sealing gasket are provided; the cover divides the water outlet hole into multiple independent areas.

[0023] In a preferred embodiment: during the process of the valve body moving from the first position to the second position, or when it is in the second position, it is combined with the valve seat to form a cavity; the cavity is connected to the variable flow water cavity through a flow hole.

[0024] In a preferred embodiment: the valve seat has a limiting component for limiting the valve body, the limiting component limiting the valve body to a second position when the water outlet device is in a first position, and the limiting component also releasing the limiting component from the valve body when the water outlet device is in the second position; the angle between the water outlet device and the horizontal plane when it is in the first position and the angle between the water outlet device and the horizontal plane when it is in the second position are different.

[0025] In a preferred embodiment: the limiting component includes a counterweight and a ball bearing, the counterweight and the ball bearing are reversibly coupled to change the movement of the counterweight along a first direction to the movement of the ball bearing along a second direction, the first direction being the movement direction of the valve body, and the second direction forming a certain angle with the movement direction of the valve body.

[0026] In a preferred embodiment: the counterweight has a receiving groove and a pressing inclined surface located on the side wall of the receiving groove; when the water outlet device is in the second posture, the counterweight moves to a position where the receiving groove is aligned with the ball, and the ball releases the limiting engagement with the valve body; when the water outlet device switches from the second posture to the first posture, the pressing inclined surface of the counterweight drives the ball to move along the second direction during the movement, limiting the engagement between the ball and the valve body.

[0027] In a preferred embodiment: a sealing ring is provided on the side of the valve body near the variable non-flowing water chamber, the variable non-flowing water chamber is sealed and isolated from the variable flowing water chamber by the sealing ring, and an air hole communicating with the atmosphere is provided on the side of the variable non-flowing water chamber away from the valve seat.

[0028] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0029] This invention provides a method for stopping water flow immediately upon shutting off. By using a valve body driven by water pressure, the volume of the variable flow chamber can be increased to form a negative pressure chamber when the water is shut off, thereby drawing residual water in the outlet hole toward the variable flow chamber, achieving the effect of stopping water flow immediately upon shutting off. Attached Figure Description

[0030] Figure 1 This is a front view of the water outlet device in the preferred embodiment 1 of the present invention;

[0031] Figure 2 This is an exploded view of the water outlet device in the preferred embodiment 1 of the present invention;

[0032] Figure 3This is a cross-sectional view of the water outlet device in the water-flow state in the preferred embodiment 1 of the present invention;

[0033] Figure 4 for Figure 3 The enlarged view at point A shows that the valve body has not yet moved to the second position;

[0034] Figure 5 for Figure 3 The enlarged view at point A shows the valve body moved to the second position;

[0035] Figure 6 This is a schematic diagram of the force analysis of the valve body in the second position in the preferred embodiment of the present invention;

[0036] Figure 7 This is a cross-sectional view of the water outlet device in the water-off state in the preferred embodiment 1 of the present invention;

[0037] Figure 8 This is a schematic diagram of the residual water in the water outlet device in the water-off state in the preferred embodiment 1 of the present invention;

[0038] Figure 9 for Figure 7 Enlarged view of point B;

[0039] Figure 10 This is a schematic diagram of the internal water storage state of the water outlet device in the water supply state in the preferred embodiment 1 of the present invention;

[0040] Figure 11 This is a schematic diagram of a face cover according to a preferred embodiment 1 of the present invention;

[0041] Figure 12 This is a schematic diagram of the water outlet and the cover assembled in the preferred embodiment 1 of the present invention;

[0042] Figure 13 This is a schematic diagram of the faceplate tilted in the preferred embodiment 1 of the present invention;

[0043] Figure 14 This is an exploded view of the water outlet device in the preferred embodiment 2 of the present invention;

[0044] Figure 15 This is a cross-sectional view of the water outlet device in the water-flow state in the preferred embodiment 2 of the present invention;

[0045] Figure 16 This is a cross-sectional view of the water outlet device in the water-off state in the preferred embodiment 2 of the present invention;

[0046] Figure 17 This is a cross-sectional view of the water outlet device in the first posture in the preferred embodiment 2 of the present invention;

[0047] Figure 18 for Figure 17 A magnified view of a portion of the image;

[0048] Figure 19 This is a cross-sectional view of the water outlet device in the second posture of the preferred embodiment 2 of the present invention;

[0049] Figure 20 for Figure 19 A magnified view of a portion of the image. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0053] This embodiment provides a method for stopping water flow immediately upon shutting off, applied to a water outlet device. The method involves using a valve body driven by water pressure to move towards the variable flow chamber, causing the volume of the variable non-flow chamber to increase and the volume of the variable flow chamber to decrease when water is flowing. When the water is shut off, the valve body resets, causing the volume of the variable non-flow chamber to decrease and the volume of the variable flow chamber to increase, forming a negative pressure chamber. The negative pressure formed by the variable flow chamber creates a pressure difference inside and outside the water outlet, thereby drawing residual water from the water outlet into the variable flow chamber, thus achieving the effect of stopping water flow immediately upon shutting off.

[0054] Example 1

[0055] refer to Figures 1-10To achieve the aforementioned method of stopping water flow immediately upon shutting off, the present invention provides a water outlet device, which includes a variable non-flowing chamber 1 and a variable flowing chamber 2. The variable non-flowing chamber 1 is sealed and isolated from the variable flowing chamber 2 on one side by a valve body 4 driven by water pressure, while the other side is connected to the atmosphere through an air vent 11. The variable flowing chamber 2 is connected to the water outlet 3 of the water outlet device. As a simple alternative to this embodiment, the air vent 11 can also be positioned in the middle of the variable non-flowing chamber 1 or on the side near the variable flowing chamber 2.

[0056] When water is flowing through, the valve body 4 is driven by water pressure to move from the first position to the second position and compress the volume of the variable water-flow chamber 2; when water is turned off, the valve body 4 moves from the second position to the first position and compresses the volume of the variable non-flow chamber 1, thereby increasing the volume of the variable water-flow chamber 2 to form a negative pressure chamber.

[0057] To ensure that the valve body 4 can move from the second position to the first position to reset after the water pressure disappears when the water is turned off, a valve seat 21 is provided in the variable flow chamber 2. The valve seat 21 is connected to the valve body 4 through a return spring 22. During the movement of the valve body 4 from the first position to the second position, the return spring 22 is compressed, accumulating elastic reset force. Thus, after the water pressure disappears, the return spring 22 releases the elastic reset force, which can drive the valve body 4 to reset to the first position.

[0058] Further reference Figure 4 As can be seen, during the movement of the valve body 4 from the first position to the second position, it mates with the valve seat 21 to form a cavity 5. However, at this point, the valve body 4 has not yet moved to the second position. Since the cavity 5 is filled with liquid, which cannot be compressed, a Y-shaped sealing ring 23 is provided on the side of the valve seat 21 to ensure that the valve body 4 can move to the second position. During the movement of the valve body 4 from the first position to the second position, or when it is in the second position, it fits with the Y-shaped sealing ring 23 to form the cavity 5. The Y-shaped sealing ring 23 fits with the valve body 4 to form the cavity 5, with the lip of the Y-shaped sealing ring 23 facing away from the cavity 5, allowing the liquid in the cavity 5 to flow out of the cavity 5 through the fit between the Y-shaped sealing ring 23 and the valve body 4. This solves the problem of the liquid not being compressible, allowing the valve body 4 to continue moving after forming the cavity 5 with the valve seat 21. Furthermore, a one-way valve 24 is provided at the position of the valve seat 21 corresponding to the cavity 5; when the valve body 4 moves in the direction where the volume of the cavity 5 decreases, the one-way valve 24 opens to connect the variable flow water cavity 2; when the valve body 4 moves in the direction where the volume of the cavity 5 increases or when the valve body does not move, the one-way valve 24 closes. Therefore, the one-way valve 24 can also allow water in the cavity 5 to flow out of the cavity 5. In this embodiment, the one-way valve 24 and the Y-type sealing ring 23 together solve the problem of the liquid being incompressible.

[0059] Meanwhile, as mentioned above, after the cavity 5 is formed, it is filled with liquid. At this point, closing the valve body 4 requires a very large force to reset it from the second position to the first position. To solve this problem, the valve seat 21 is provided with a duckbill valve 25 corresponding to the position of the cavity 5. When the volume of the cavity 5 decreases, the duckbill valve 25 closes; when the volume of the cavity 5 increases, the duckbill valve 25 opens and connects to the atmosphere. That is, when the valve body 4 moves from the second position to the first position, the duckbill valve 25 can open, thereby connecting the cavity 5 to the outside atmosphere, allowing the valve body 4 to reset to the first position. Alternatively, the duckbill valve 25 can also open to connect to the variable flow water cavity 2 when the valve body 4 moves from the second position to the first position.

[0060] In this embodiment, the area S3 of the Y-shaped sealing ring 23 is greater than or equal to the cross-sectional area S2 of the variable non-flowing cavity 1, and less than the cross-sectional area S1 of the portion of the variable flowing cavity 2 corresponding to the movement range of the valve body 4. Taking the valve body 4 as the object of study, the valve body 4 is subjected to the water pressure on the inlet side, generating a leftward pressure F1 = P1(S1-S2); the valve body 4 is also subjected to the rightward pressure F2 = P2(S1-S3) generated by the water outlet side of the outlet device. Since there will be pressure loss along the flow path, P1 is slightly greater than P2. When S3 is greater than or equal to S2, F1 > F2, which can keep the valve body 4 in the second position.

[0061] Furthermore, in this embodiment, the cross-sectional area S1 of the portion of the variable water passage chamber 2 corresponding to the movement range of the valve body 4, and the cross-sectional area S4 of the portion corresponding to the variable non-flowing water chamber 1, are respectively larger than the cross-sectional areas S2 of the valve body 4 and the variable non-flowing water chamber 1. This ensures that when the valve body 4 is in the second position, a water passage 6 is formed between the side of the valve body 4, the side of the variable non-flowing water chamber 1, and the inner wall of the variable water passage 2. These water passages 6 are filled with water when the water is flowing, and when the water is turned off, the valve body 4 moves to the first position, which compresses the water passage 6. Therefore, a water passage hole 41 is required on the valve body 4 to connect the water passage 6 to the variable water passage 2. In this way, when the water is turned off, the water in the water passage 6 can flow out through the water passage hole 41 during the movement of the valve body 4 without hindering the movement of the valve body 4.

[0062] In this embodiment, to prevent water from flowing out of the outlet hole 3 from the variable flow chamber 2 after the water is turned off, a first sealing gasket 31 is provided on the outlet hole 3, and a cutting slit 311 is provided on the first sealing gasket 31. When water is supplied, the water pressure acts on the first sealing gasket 31 to open the cutting slit 311. At the moment the water is turned off, the negative pressure of the variable flow chamber 2 draws the water in the outlet hole 3 into the variable flow chamber 2, achieving the effect of stopping the water supply immediately upon turning it off. In the water-off state, the negative pressure of the variable flow chamber 2 and the external atmospheric pressure create a pressure difference on both sides of the first sealing gasket 31. Under the action of the pressure difference, the first sealing gasket 31 arches upward, thereby closing the cutting slit 311. In this embodiment, the cutting slit 311 is cross-shaped, but other shapes can also be used as a simple alternative.

[0063] Further reference Figures 11-13Furthermore, the water outlet device in this embodiment is a handheld showerhead. Since the handheld showerhead may be in any position when the water is turned off, it is necessary to ensure that the water stops immediately when the handheld showerhead is in any position. Therefore, the water outlet device in this embodiment includes a cover 7 and a water outlet body 8. The cover 7 is provided with the water outlet hole 3 and a first sealing gasket 31. The cover 7 is also provided with multiple ribs 71 that divide the water outlet hole 3 into multiple independent areas 72. The water outlet body 8 is provided with a water inlet hole 82 corresponding to each area, and a second sealing gasket 81 is provided at the water inlet hole 82. The second sealing gasket 81, like the first sealing gasket 31, also has a cut slit. After the faceplate 7 and the water outlet 8 are installed, the rib 71 is sealed to the water outlet 8. When water is supplied, the water flow acts on the second sealing gasket 81 to open the water inlet 82, allowing water to enter the faceplate 7. At the moment the water is turned off, the negative pressure of the variable flow chamber 2 draws the water in the water outlet 3 into the variable flow chamber 2, achieving the effect of stopping the water supply immediately upon turning it off. In the off state, the negative pressure of the variable flow chamber 2 and the external atmospheric pressure create a pressure difference on both sides of the second sealing gasket 81. Under the action of the pressure difference, the second sealing gasket 81 arches upward, thereby closing the cut seam. Multiple independent areas are sealed and isolated by the faceplate 7, the rib 71 on the faceplate, the water outlet 8, and the second sealing gasket 81 on the water inlet 82. That is, the water flows in each independent area 72, but the water in different independent areas 72 does not communicate with each other. Each region extends radially at a distance less than the diameter of the cover 7. Taking the outermost region as an example, the height difference between the highest and lowest positions of this region 72 in an inclined state is h2. However, without regional division, the entire cover 7 consists of only one region. In this case, the height difference between the highest and lowest positions is the height from one edge of the cover 7 to the opposite edge, i.e., h1. Obviously, h1 is significantly greater than h2. An excessively large height difference will result in a relatively high pressure at the lowest position. p = ρgh is a fundamental formula in hydrostatics used to calculate the pressure at a point in a static liquid. When the tension between water or the tension between water and the cover is less than this pressure, the water shut-off function fails. Thus, even if the variable water chamber 2 creates negative pressure, the water outlet 3 on the cover 7 will continue to drip for a period of time after the water is shut off, causing the water shut-off function to fail. Dividing the region solves this problem. As a simple alternative to this embodiment, the first sealing gasket 31 on the water outlet 3 can be removed, leaving only the second sealing gasket 81 on the water outlet body 8.

[0064] Example 2

[0065] refer to Figures 14-20In this embodiment, the valve body 4 can or cannot be held in the second position by placing the water outlet device in different postures. If the valve body 4 is held in the second position, it cannot return to the first position when the water is turned off, and the water-stop function will fail. Conversely, the water-stop function can be activated normally. For this purpose, the valve seat 21 has a limiting component 9 for limiting the valve body 4. When the water outlet device is in the first posture, the limiting component 9 limits the valve body 4 to the second position. The limiting component 9 also releases the limiting component from the valve body 4 when the water outlet device is in the second posture. The angle between the water outlet device and the horizontal plane is different when the water outlet device is in the first posture and the second posture.

[0066] In this embodiment, the limiting component 9 includes a counterweight 91 and a ball bearing 92. The counterweight 91 and the ball bearing 92 are switched to change the movement of the counterweight 91 along the first direction to the movement of the ball bearing 92 along the second direction. The first direction is the movement direction of the valve body 4, that is, the length direction of the valve body 4. The second direction only needs to be at a certain angle to the movement direction of the valve body 4. In this embodiment, the second direction is the width direction of the valve body 4. The counterweight 91 has a receiving groove 911 and a pressing inclined surface 912 located on the side wall of the receiving groove 911. When the water outlet device is in the second posture, the counterweight 91 has a force that moves towards the variable non-flowing water cavity 1. Specifically, the counterweight 91 moves towards the variable non-flowing water cavity 1 under the action of gravity. The counterweight 91 moves to the position where the receiving groove 911 is aligned with the ball 92, and the ball 92 is released from the limiting engagement with the valve body 4. When the water outlet device switches from the second posture to the first posture, the counterweight 91 has a force that moves away from the variable non-flowing water cavity 1. Specifically, the counterweight moves away from the variable non-flowing water cavity 1 under the action of gravity. During the movement, the pressing inclined surface 912 of the counterweight 91 drives the ball 92 to move along the second direction, limiting the engagement of the ball 92 with the valve body 4.

[0067] In addition, in this embodiment, when the valve body 4 is in the second position, it is combined with the valve seat 21 to form a cavity 5, that is, the variable water passage cavity 2 is divided into cavity 5 and water passage 6; the cavity 5 is connected to the water passage 6 through the flow hole 51, so that when the volume of the cavity 5 decreases, the water in the cavity 5 can flow into the water passage 6.

[0068] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A method for stopping water flow immediately upon shutting off, applied to a water outlet device, characterized by: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber. The variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure. The variable non-flow chamber is connected to the atmosphere. The method includes the steps of using the valve body driven by water pressure to increase the volume of the variable non-flowing chamber and decrease the volume of the variable flowing chamber when the water is flowing, and decreasing the volume of the variable non-flowing chamber and increasing the volume of the variable flowing chamber to form a negative pressure chamber when the water is closed.

2. A method for stopping water flow immediately upon shutting off, applied to a water outlet device, characterized by: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber. The variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure. The variable non-flow chamber is connected to the atmosphere. The method includes the steps of using the valve body driven by water pressure to increase the volume of the variable non-flow chamber and decrease the volume of the variable flow chamber when the water is flowing, and decreasing the volume of the variable non-flow chamber and increasing the volume of the variable flow chamber when the water is closed to draw residual water from the outlet into the variable flow chamber.

3. The method of stopping water flow immediately upon shutting off, applied to a water outlet device, is characterized by: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber; the variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure, and the variable non-flow chamber is connected to the atmosphere; the method includes using the valve body in different positions when water is flowing and when water is closed, so that the volume of the variable flow chamber decreases when water is flowing and increases when water is closed to form a negative pressure chamber.

4. A method for stopping water flow immediately upon shutting off, applied to a water outlet device, characterized by: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber; the variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure, and the variable non-flow chamber is connected to the atmosphere; the method includes using the valve body in different positions when water is flowing and when water is closed, so that the volume of the variable flow chamber decreases when water is flowing and increases when water is closed, so that the residual water from the water outlet is drawn into the variable flow chamber.

5. A method for stopping water flow immediately upon shutting off, applied to a water outlet device, characterized by: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber; the variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure, and the variable non-flow chamber is connected to the atmosphere; the volume of the variable flow chamber is not equal when water is flowing and when water is closed, so that the variable flow chamber forms a negative pressure chamber when water is closed.

6. A method for stopping water flow immediately upon shutting off, applied to a water outlet device, characterized by: The water outlet device is equipped with a variable non-flowing water chamber and a variable flowing water chamber; the variable non-flowing water chamber is sealed and isolated from the variable flowing water chamber by a valve body driven by water pressure, and the variable non-flowing water chamber is connected to the atmosphere; the volume of the variable flowing water chamber is not equal when water is flowing and when water is closed, so that the volume of the variable flowing water chamber increases when water is closed, drawing the residual water from the water outlet into the variable flowing water chamber.

7. A water outlet device, characterized in that: The water outlet device is provided with a variable non-flow chamber and a variable flow chamber; the variable non-flow chamber is sealed and isolated from the variable flow chamber by a valve body driven by water pressure, and the variable non-flow chamber is connected to the atmosphere; the variable flow chamber is connected to the water outlet hole of the water outlet device. When water is flowing through the valve body, it is driven by water pressure to move from the first position to the second position and compress the volume of the variable flow chamber; when water is turned off, the valve body moves from the second position to the first position and compresses the volume of the variable non-flow chamber, thereby increasing the volume of the variable flow chamber to form a negative pressure chamber.

8. The water outlet device according to claim 7, characterized in that: A valve seat is provided inside the variable flow chamber, and the valve seat is connected to the valve body through a return spring; during the process of the valve body moving from the first position to the second position, the return spring is compressed to accumulate elastic return force.

9. The water outlet device according to claim 8, characterized in that: During the process of the valve body moving from the first position to the second position, or when the valve body is in the second position, it can be combined with the valve seat to form a cavity; the valve seat is provided with a one-way valve at the position corresponding to the cavity; when the valve body moves in the direction of decreasing cavity volume, the one-way valve opens to connect the variable flow water cavity; when the valve body moves in the direction of increasing cavity volume or when the valve body does not move, the one-way valve closes.

10. The water outlet device according to claim 9, characterized in that: The valve seat is also provided with a duckbill valve port; when the volume of the cavity decreases, the duckbill valve port closes; when the volume of the cavity increases, the duckbill valve port opens and connects to the atmosphere or a variable water cavity.

11. The water outlet device according to claim 9, characterized in that: The valve seat is provided with a Y-shaped sealing ring on its side. During the process of the valve body moving from the first position to the second position or when it is in the second position, it fits and splices with the Y-shaped sealing ring to form the cavity.

12. The water outlet device according to claim 11, characterized in that: The area S3 of the Y-shaped sealing ring is greater than or equal to the cross-sectional area S2 of the variable non-flowing cavity, and less than the cross-sectional area S1 of the part of the valve body that corresponds to the movement range of the variable flowing cavity.

13. The water outlet device according to claim 7, characterized in that: The cross-sectional area S1 of the variable water passage cavity corresponding to the movement range of the valve body and the cross-sectional area S4 of the part corresponding to the variable non-flow cavity are respectively larger than the cross-sectional area S2 of the valve body and the variable non-flow cavity; so that when the valve body is in the second position, a water passage is formed between the side of the valve body, the side of the variable non-flow cavity and the inner wall of the variable water passage cavity. The valve body is provided with a water passage hole that connects the water passage channel to the variable flow chamber.

14. The water outlet device according to claim 7, characterized in that: A sealing gasket is provided on the water outlet, and a cut slit is provided on the sealing gasket; when water is flowing, the water pressure acts on the sealing gasket to open the cut slit; when water is turned off, the negative pressure of the variable water passage cavity closes the cut slit.

15. The water outlet device according to claim 14, characterized in that: The water outlet device includes a cover, on which the water outlet hole and a sealing gasket are provided; the cover divides the water outlet hole into multiple independent areas.

16. The water outlet device according to claim 8, characterized in that: During the process of the valve body moving from the first position to the second position, or when it is in the second position, it combines with the valve seat to form a cavity; the cavity is connected to the variable flow water cavity through a flow hole.

17. The water outlet device according to claim 8, characterized in that: The valve seat has a limiting component for limiting the valve body. When the water outlet device is in a first position, the limiting component limits the valve body to a second position. The limiting component also releases the limiting component from the valve body when the water outlet device is in the second position. The angle between the water outlet device and the horizontal plane when it is in the first position is different from the angle between the water outlet device and the horizontal plane when it is in the second position.

18. The water outlet device according to claim 17, characterized in that: The limiting component includes a counterweight and a ball bearing. The counterweight and the ball bearing are reversible to change the movement of the counterweight along a first direction to the movement of the ball bearing along a second direction. The first direction is the movement direction of the valve body, and the second direction forms a certain angle with the movement direction of the valve body.

19. The water outlet device according to claim 18, characterized in that: The counterweight has a receiving groove and a pressing inclined surface located on the side wall of the receiving groove; when the water outlet device is in the second posture, the counterweight moves to the position where the receiving groove is aligned with the ball, and the ball releases the limiting engagement with the valve body; when the water outlet device switches from the second posture to the first posture, the pressing inclined surface of the counterweight drives the ball to move along the second direction during the movement, limiting the engagement between the ball and the valve body.

20. The water outlet device according to any one of claims 7-19, characterized in that: A sealing ring is provided on the side of the valve body near the variable non-flowing water chamber. The variable non-flowing water chamber is sealed and isolated from the variable flowing water chamber by the sealing ring. An air hole communicating with the atmosphere is provided on the side of the variable non-flowing water chamber away from the valve seat.

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