Noise-reduction closestool flushing valve and closestool flushing device

Abstract

The utility model provides a closestool flushing valve and a closestool flushing device capable of reducing noise, which comprise a body provided with a second water inlet channel, a second water outlet channel, a third water outlet channel and a noise-reducing water outlet channel, the second water inlet channel is communicated with an outlet of a water pump for pumping water in a water tank, and the third water outlet channel is communicated with the noise-reducing water outlet channel; the second water outlet channel and the noise reduction water outlet channel are both used for being communicated with an upper flushing opening formed in the upper portion of a urinal of the closestool, the third water outlet channel is used for being communicated with a lower flushing opening formed in the bottom of the urinal of the closestool, and the noise reduction water outlet channel and the second water inlet channel are kept in a normally-open state; the switching assembly is movably arranged on the body to control the second water inlet channel to be communicated with the second water outlet channel or the third water outlet channel in a switching manner; the buoy assembly is arranged on the body and provided with a buoy capable of moving up and down along with the water level of the water tank, when the buoy floats up, the switching assembly controls the second water inlet channel to be communicated with the second water outlet channel, and when the buoy falls down, the switching assembly controls the second water inlet channel to be communicated with the third water outlet channel.

Description

Technical Field

[0001] This utility model relates to the field of toilet technology, and in particular to a noise-reducing toilet flush valve and a toilet flushing device having the noise-reducing toilet flush valve. Background Technology

[0002] In existing technologies, some toilet flushing devices generally employ a method where the upper flush outlet is controlled to flush the brush ring, dislodging waste from the toilet bowl's inner wall to the bottom. Then, the lower flush outlet is controlled to spray water, and finally, the upper flush outlet is controlled again to replenish the water seal. However, this alternating water flow method, especially for toilet flushing devices that use a water pump to draw water from the toilet tank, often results in a problem during the lower flushing process. After the water in the toilet bowl is siphoned away by the drain pipe, and the wastewater is mostly emptied, the lower flush outlet continues to spray a high-pressure stream of water from the pump. This water jet impacts the inner wall of the toilet bowl, producing significant spray noise and splashing, leading to a poor user experience.

[0003] Therefore, how to reduce the flushing noise and splashing of toilet flushing devices that use water pumps is a technical problem that needs to be solved in this field. Utility Model Content

[0004] To address the aforementioned technical problems, one objective of this utility model is to provide a noise-reducing toilet flush valve with a simple structure and significant noise reduction and splash prevention effects. Another objective of this utility model is to provide a toilet flushing device incorporating this noise-reducing toilet flush valve.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A noise-reducing toilet flush valve, located in the toilet tank, includes:

[0007] The main body has a second water inlet channel, a second water outlet channel, a third water outlet channel, and a noise reduction water outlet channel. The second water inlet channel is connected to the outlet of a water pump used to draw water from the water tank. The second water outlet channel and the noise reduction water outlet channel are both connected to the upper flushing port provided at the top of the toilet bowl. The third water outlet channel is connected to the lower flushing port provided at the bottom of the toilet bowl. The noise reduction water outlet channel is kept in a normally open state with the second water inlet channel.

[0008] A switching component is movably disposed on the main body to control the second water inlet channel to switchly connect with the second water outlet channel or the third water outlet channel;

[0009] A float assembly, disposed on the main body, has a float that moves up and down with the water level in the water tank. When the float rises, the switching component controls the second water inlet channel to connect with the second water outlet channel. When the float falls, the switching component controls the second water inlet channel to connect with the third water outlet channel.

[0010] In some preferred embodiments, the inlet end of the noise-reducing water outlet channel is connected to the second water inlet channel, the outlet end of the noise-reducing water outlet channel is connected to the second water outlet channel, and the noise-reducing water outlet channel is connected to the upper flushing port through the second water outlet channel.

[0011] In some preferred embodiments, the flow cross-sectional area of ​​the noise-reducing water outlet channel is smaller than that of the second and third water outlet channels.

[0012] In some preferred embodiments, the switching component includes a first switching component and a second switching component. The first switching component is disposed between the second water inlet channel and the second water outlet channel to control the connection and disconnection between the second water inlet channel and the second water outlet channel. The second switching component is disposed between the second water inlet channel and the third water outlet channel to control the connection and disconnection between the second water inlet channel and the third water outlet channel. When the first switching component is in the connected position connecting the second water inlet channel and the second water outlet channel, the second switching component is in the disconnected position disconnecting the second water inlet channel and the third water outlet channel. When the first switching component is in the disconnected position disconnecting the second water inlet channel and the second water outlet channel, the second switching component is in the connected position connecting the second water inlet channel and the third water outlet channel.

[0013] In some preferred embodiments, the main body is further provided with a first water inlet channel and a first water outlet channel. The first water inlet channel is connected to an external water source, and the first water outlet channel is connected to the inner cavity of the water tank. The toilet flushing valve also includes a water inlet assembly, which is movably disposed on the main body to control the connection or disconnection of the first water inlet channel and the first water outlet channel. When the float moves up and down with the water level in the water tank, it is linked to the water inlet assembly to control the on / off state.

[0014] In some preferred embodiments, the water inlet assembly adopts a first back pressure valve group, and the first switching assembly adopts a second back pressure valve group. The first back pressure valve group has a first pressure relief hole and a first lifting rod for controlling the opening and closing of the first pressure relief hole. The second back pressure valve group has a second pressure relief hole and a second lifting rod for controlling the opening and closing of the second pressure relief hole. The float controls the on / off of the first back pressure valve group and the second back pressure valve group respectively by linking the first lifting rod and the second lifting rod.

[0015] In some preferred embodiments, the second switching assembly includes a piston and a return spring. When the second back pressure valve assembly is in the cut-off position, the piston moves under the water pressure of the second inlet channel to a position connecting the second inlet channel and the third outlet channel. When the second back pressure valve assembly is in the connected position, the piston moves under the elastic force of the return spring to a position cutting off the second inlet channel and the third outlet channel.

[0016] In some preferred embodiments, the float assembly further includes a float cup fixed to the body, the float being installed inside the float cup, the top of the float cup forming an opening, and the bottom having a drain hole, the drain hole having a buoyancy-driven one-way valve, the one-way valve closing the drain hole when it floats up, and opening the drain hole when it falls down.

[0017] In addition, this utility model also provides a toilet flushing device, including a toilet, the toilet having a water tank and a bowl, the upper part of the bowl having an upper flushing port, the lower part of the bowl having a lower flushing port, and the water tank having a toilet flushing valve as described in any of the above claims.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] This invention features a noise-reducing water outlet channel that connects to the upper flushing port on the top of the toilet bowl. This channel is also kept constantly open to the second water inlet channel. This design allows the second water inlet channel to supply water to the lower flushing port via the third water outlet channel for flushing, while simultaneously supplying water to the upper flushing port through the noise-reducing water outlet channel. This replenishes the water level at the bottom of the toilet bowl, ensuring sufficient water volume and effectively preventing excessive spraying noise and splashing caused by the lower flushing port spraying into the air. This achieves noise reduction and splash prevention, significantly improving the user experience. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0021] in:

[0022] Figure 1 This is a three-dimensional assembly schematic diagram of a toilet flushing valve according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a toilet flushing valve according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a cross-sectional view of a toilet flushing valve according to an embodiment of the present invention when the float is in the floating position and the water pump is turned on (the arrows in the figure indicate that the water flow from the second inlet channel to the second outlet channel and the noise reduction outlet channel).

[0026] Figure 5 This is a toilet flushing valve according to an embodiment of the present invention. Figure 4 A cross-sectional view of another section under the same condition;

[0027] Figure 6 This is a toilet flushing valve according to an embodiment of the present invention. Figure 4 A diagram illustrating the flushing process of a toilet bowl in its normal state (arrows in the diagram indicate water flowing out from the top flushing port to flush the inner wall of the toilet bowl).

[0028] Figure 7 This is a cross-sectional view of a toilet flushing valve according to an embodiment of the present invention, with the float in the lowered position and the water pump in the on state (the arrows in the figure indicate that the water flow from the second inlet channel to the third outlet channel and the noise reduction outlet channel).

[0029] Figure 8 This is a toilet flushing valve according to an embodiment of the present invention. Figure 7 A cross-sectional view of another section in the state (the arrow in the figure indicates that the water flow from the second water inlet channel to the noise reduction water outlet channel).

[0030] Figure 9 This is a toilet flushing valve according to an embodiment of the present invention. Figure 7 A cross-sectional view of another section in the state;

[0031] Figure 10 This is a toilet flushing valve according to an embodiment of the present invention. Figure 7 A diagram illustrating the flushing process of the toilet bowl in this state (arrows in the diagram indicate water flowing out from the upper and lower flush outlets of the toilet bowl).

[0032] The attached figures are labeled as follows:

[0033] 1-Toilet flush valve:

[0034] 10-Main body; 11-First water inlet channel; 111-First valve port; 112-First water inlet pipe; 12-First water outlet channel; 121-First water outlet pipe; 13-Second water inlet channel; 131-Second valve port; 132-Third valve port; 133-Second water inlet pipe; 14-Second water outlet channel; 15-Third water outlet channel; 16-Noise reduction water outlet channel;

[0035] 20 - Water inlet assembly (first back pressure valve group); 21 - First back pressure chamber; 22 - First water-stop rubber pad; 23 - First pressure relief hole; 24 - First lifting rod;

[0036] 30 - Switching assembly; 31 - First switching assembly (second back pressure valve assembly); 311 - Second back pressure chamber; 312 - Second water-stop rubber pad; 313 - Second pressure relief hole; 314 - Second lifting rod; 32 - Second switching assembly; 321 - Piston; 322 - Return spring;

[0037] 40 - Float assembly; 41 - Float; 42 - Float cup; 421 - Opening; 422 - Drain hole; 423 - Check valve;

[0038] 2-Water pump;

[0039] 3-Toilet: 301-Upper flush outlet; 302-Lower flush outlet; 303-Water tank; 304-Pot bowl. Detailed Implementation

[0040] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0041] Please see Figures 1 to 10 A preferred embodiment of the present invention provides a noise-reducing toilet flushing valve 1, which is disposed in the water tank 303 of the toilet 3, and includes:

[0042] The main body 10 has a second water inlet channel 13, a second water outlet channel 14, a third water outlet channel 15 and a noise reduction water outlet channel 16. The second water inlet channel 13 is connected to the outlet of the water pump 2 used to draw water from the water tank 303. The second water outlet channel 14 and the noise reduction water outlet channel 16 are both used to connect to the upper flushing port 301 provided on the upper part of the toilet bowl 304 of the toilet 3. The third water outlet channel 15 is used to connect to the lower flushing port 302 provided on the bottom of the toilet bowl 304 of the toilet 3. The noise reduction water outlet channel 16 is kept in a normally open state with the second water inlet channel 13.

[0043] Switching component 30 is movably located on the main body 10 to control the second water inlet channel 13 to switch between being connected to the second water outlet channel 14 or the third water outlet channel 15.

[0044] The float assembly 40 is mounted on the main body 10 and has a float 41 that moves up and down with the water level of the water tank 303. When the float 41 floats up, the switching assembly 30 controls the second water inlet channel 13 to connect with the second water outlet channel 14. When the float 41 falls down, the switching assembly 30 controls the second water inlet channel 13 to connect with the third water outlet channel 15.

[0045] By setting up a noise-reducing water outlet channel 16, which is connected to the upper flushing port 301 located on the upper part of the toilet bowl 304, and keeping the noise-reducing water outlet channel 16 in a constantly open state with the second water inlet channel 13, this design allows the second water inlet channel 13 to supply water to the lower flushing port 302 for flushing through the third water outlet channel 15. At the same time, the second water inlet channel 13 can also supply water to the upper flushing port 301 through the noise-reducing water outlet channel 16, thereby supplementing the water volume at the bottom of the toilet bowl 304. This ensures that there is sufficient water at the bottom of the toilet bowl 304, effectively preventing the lower flushing port 202 from spraying into the air, which would cause excessive noise and splashing. This achieves the purpose of noise reduction and splash prevention, and greatly improves the user experience.

[0046] In this embodiment, the inlet end of the noise-reducing water outlet channel 16 is connected to the second water inlet channel 13, and the outlet end of the noise-reducing water outlet channel 16 is connected to the second water outlet channel 14. The noise-reducing water outlet channel 16 is connected to the upper flushing port 301 through the second water outlet channel 14. In this way, only one water path needs to be set up to connect the second water inlet channel 13 and the upper flushing port 301, eliminating the need for a separate water path connecting the noise-reducing water outlet channel 16 and the upper flushing port 301. This results in a simpler and more compact structure, and saves costs.

[0047] In this embodiment, the flow cross-sectional area of ​​the noise-reducing water outlet channel 16 is smaller than that of the second water outlet channel 14 and the third water outlet channel 15. In specific implementation, when flushing with water from the lower flushing port 302, a small portion of the water flow is allowed to pass through the noise-reducing water outlet channel 16 to supplement the water volume at the bottom of the toilet bowl 304, so as to avoid jet noise and splashing.

[0048] In this embodiment, the main body 10 is also provided with a first water inlet channel 11 and a first water outlet channel 12. The first water inlet channel 11 is connected to an external water source (such as a tap water pipe), and the first water outlet channel 12 is connected to the inner cavity of the water tank 303. The toilet flushing valve 1 also includes a water inlet assembly 20. The water inlet assembly 20 is movably disposed on the main body 10 to control the connection or disconnection of the first water inlet channel 11 and the first water outlet channel 12. When the float 41 moves up and down with the water level of the water tank 303, it is linked to the water inlet assembly 20 to control the on and off.

[0049] In this embodiment, specifically, the switching component 30 includes a first switching component 31 and a second switching component 32. The first switching component 31 is disposed between the second water inlet channel 13 and the second water outlet channel 14 to control the opening and closing of the two water inlet channels 13 and 14. The second switching component 32 is disposed between the second water inlet channel 13 and the third water outlet channel 15 to control the opening and closing of the two water inlet channels 13 and 15. The main body 10 is provided with a first valve port 111 located between the first water inlet channel 11 and the first water outlet channel 12, a second valve port 131 located between the second water inlet channel 13 and the second water outlet channel 14, and a third valve port 132 located between the second water inlet channel 13 and the third water outlet channel 15. The water inlet component 20 controls the opening and closing of the first valve port 111, the first switching component 31 controls the opening and closing of the second valve port 131, and the second switching component 32 controls the opening and closing of the third valve port 132. When the first switching component 31 opens the second valve port 131 and is in the position connecting the second water inlet channel 13 and the second water outlet channel 14, the second switching component 32 closes the third valve port 132 and is in the position cutting off the second water inlet channel 13 and the third water outlet channel 15; when the first switching component 31 closes the second valve port 131 and is in the position cutting off the second water inlet channel 13 and the second water outlet channel 14, the second switching component 32 opens the third valve port 132 and is in the position connecting the second water inlet channel 13 and the third water outlet channel 15.

[0050] Specifically, in this embodiment, the water inlet assembly 20 adopts a first back pressure valve group 20, and the first switching assembly 31 adopts a second back pressure valve group 31. Both the first back pressure valve group 20 and the second back pressure valve group 31 adopt existing known back pressure valve group structures. Existing known back pressure valve group structures typically include a back pressure chamber connected to the water inlet channel, a pressure relief hole connected to the back pressure chamber, a water-stop rubber pad for surrounding the back pressure chamber, and a lifting rod for opening and closing the pressure relief hole, etc. Its working principle is roughly as follows: when the float 41 is in the floating position, the float 41 closes the pressure relief hole through the lifting rod, and the pressure in the back pressure chamber causes the water-stop rubber pad to move to the closed position that cuts off the water inlet channel and the water outlet channel; when the water level in the water tank drops and the float 41 is in the falling position, the float 41 opens the pressure relief hole through the lifting rod, and the water in the back pressure chamber flows out through the pressure relief hole to relieve pressure. Under the action of the water pressure in the water inlet channel, the water-stop rubber pad moves to the open position that connects the water inlet channel and the water outlet channel.

[0051] Specifically, the first back pressure valve assembly 20 has a first back pressure chamber 21, a first water-stop rubber pad 22, a first pressure relief hole 23, and a first lifting rod 24 for controlling the opening and closing of the first pressure relief hole 23; the second back pressure valve assembly 31 has a second back pressure chamber 311, a second water-stop rubber pad 312, a second pressure relief hole 313, and a second lifting rod 314 for controlling the opening and closing of the second pressure relief hole 313. The float 41 controls the on / off state of the first back pressure valve assembly 20 and the second back pressure valve assembly 31 by linking the first lifting rod 24 and the second lifting rod 314 respectively. The structure and principle of the other back pressure valve assemblies not described here will not be explained in detail.

[0052] In this embodiment, the first lifting rod 24 and the second lifting rod 314 are integrally formed, which makes the structure simple and convenient to form and install.

[0053] In this embodiment, the second switching component 32 includes a piston 321 and a return spring 322. When the second back pressure valve group 31 is in the cut-off position (i.e., the second valve port 131 is closed), the water pressure of the second water inlet channel 13 can act on the piston 321, causing the piston 321 to move to the connection position connecting the second water inlet channel 13 and the third water outlet channel 15 (i.e., the third valve port 132 is opened) under the action of the water pressure of the second water inlet channel 13. When the second back pressure valve group 31 is in the connection position (i.e., the second valve port 131 is opened), the water flow in the second water inlet channel 13 is diverted and is insufficient to overcome the elastic force of the return spring 322. Under the action of the elastic force of the return spring 322, the piston 321 moves to the cut-off position cutting off the second water inlet channel 13 and the third water outlet channel 15 (i.e., the third valve port 132 is closed). Specifically, the return spring 322 is a compression spring.

[0054] In this embodiment, the switching component 30 employs a back-pressure type first switching component 31 and a piston type second switching component 32 to jointly achieve the switching control of water flow by the switching component 30. It is understood that in other embodiments, other common switching valve structures can also be used, without limitation, as long as they can switch the water flow of the second inlet channel 13 to the second outlet channel 14 or the third outlet channel 15.

[0055] In this embodiment, the float assembly 40 further includes a float cup 42 fixed to the main body 10. A float 41 is installed inside the float cup 42. The top of the float cup 42 forms an opening 421, and the bottom has a drain hole 422. A one-way valve 423 with buoyancy is provided at the drain hole 422. When the one-way valve 423 floats up, it closes the drain hole 422; when the one-way valve 423 falls down, it opens the drain hole 422. The function of the float cup 42 is to allow the float 41 inside the float cup 42 to float quickly after water from the water tank is rapidly poured into it. The structure and principle of the float cup 42 can also be achieved using existing technology.

[0056] In this embodiment, the main body 10 includes a first water inlet pipe 112 with a first water inlet channel 11, a second water inlet pipe 133 with a second water inlet channel 13, and a first water outlet pipe 121 with a first water outlet channel 12. The first water outlet pipe 121 is sleeved outside the first water inlet pipe 112, and the first water outlet pipe 121 and the second water inlet pipe 133 are arranged longitudinally side by side. With this layout, the structure of the toilet flush valve is more compact.

[0057] The working process of this embodiment is briefly described as follows:

[0058] (1) Water tank filling process:

[0059] When there is no water in the water tank or the water level is below the drain hole 422 of the float cup 42, the float 41 is in the lowered position within the float cup 42. The lowering of the float 41 causes the first lifting rod 24 and the second lifting rod 314 to be in the lowered position. The first lifting rod 24 opens the first pressure relief hole 23 of the first back pressure valve assembly 20, and the second lifting rod 314 closes the second pressure relief hole 313 of the second back pressure valve assembly 31. After the first pressure relief hole 23 is opened, the first water-stop rubber gasket 22 opens the first valve port 111, connecting the first water inlet channel 11 with the first water outlet channel 12, allowing water to flow into the inner cavity of the water tank through the first water outlet channel 12.

[0060] As water continuously enters the inner cavity of the water tank through the first outlet channel 12, the water level in the inner cavity of the water tank rises continuously. When the water level in the inner cavity of the water tank rises to the point where the buoyancy of the one-way valve 423 is sufficient to overcome the weight of the one-way valve 423, the one-way valve 423 floats up and closes the drain hole 422. In this way, water in the water tank will not enter the float cup 42 through the drain hole 422, but will only enter through the top opening of the float cup 42 after the water level in the inner cavity of the water tank rises to the top opening of the float cup 42, quickly filling the float cup 42, thereby causing the float 41 to float up quickly. After the float 41 floats up, it drives the first lifting rod 24 and the second lifting rod 314 to lift. The first lifting rod 24 closes the first pressure relief hole 23 of the first back pressure valve group 20, and the second lifting rod 314 opens the second pressure relief hole 313 of the second back pressure valve group 31. After the first pressure relief hole 23 is closed, the first water-stop rubber gasket 22 closes the first valve port 111, thereby cutting off the first water inlet channel 11 from the first water outlet channel 12 and stopping the water from entering the inner cavity of the water tank.

[0061] (2) Water tank drainage process (see Figures 4-10 ):

[0062] See Figures 4 to 6When water pump 2 is turned on, it draws water from the tank to the second inlet channel 13. At this time, because the float 41 is in a floating state, the second lifting rod 314 opens the second pressure relief hole 313 of the second back pressure valve assembly 31, and the second water-stop rubber gasket 312 opens the second valve port 131. The water flow from the second inlet channel 13 flows through the second valve port 131 to the second outlet channel 14, and then to the toilet's upper flushing port 301 to flush the inner wall of the toilet. Simultaneously, due to the noise reduction in the outlet channel 1... 6. The second water inlet channel 13 is kept open. A small portion of the water flow in the second water inlet channel 13 also flows to the second water outlet channel 14 through the noise reduction outlet channel 16. Furthermore, since the water flow in the second water inlet channel 13 flows to the second water outlet channel 14 and the noise reduction outlet channel 16, the water pressure in the second water inlet channel 13 cannot overcome the elastic force of the return spring 322, thus failing to drive the piston 321 to open the third valve port 132. The piston 321 remains closed on the third valve port 132.

[0063] See Figure 7 Zhihe Figure 10 As water pump 2 continues to operate, water in the tank is continuously pumped out, causing the water level to drop. When check valve 423 falls with the drop in water level, it opens drain hole 422, allowing water in float cup 42 to flow out through drain hole 422, thus causing float 41 to fall. After float 41 falls, it drives second lifting rod 314 to the lowered position. Second lifting rod 314 closes second pressure relief hole 313 of second back pressure valve assembly 31, thereby causing second water-stop rubber gasket 312 to close second valve port 131. At this time, the water pressure in second inlet channel 13 can act on piston 321, causing piston 321 to overcome the elastic force of return spring 322 and open third valve port 132. Thus, the water flow in second inlet channel 13 switches to third outlet channel 15, and then flows to toilet through third outlet channel 15. The lower flushing port 302 is used to flush the bottom of the toilet bowl; at the same time, since the noise reduction water outlet channel 16 and the second water inlet channel 13 are kept in a normally open state, a small part of the water flow from the second water inlet channel 13 also flows through the noise reduction water outlet channel 16 to the second water outlet channel 14, and then replenishes the bottom of the toilet bowl 304 through the upper flushing port 301, so that there is enough water at the bottom of the toilet bowl 304, effectively avoiding the problem of excessive spraying noise and splashing caused by the lower flushing port 302 spraying into the air, thus achieving the purpose of noise reduction and splash prevention.

[0064] After stopping water pump 2 and finishing the flushing, the water level in the tank is lower than the drain hole 422. The water in the float cup 42 will flow out from the drain hole 422 to prepare for the next float 41 to float. The toilet flushing valve returns to the water inlet state.

[0065] This utility model also provides a toilet flushing device, including a toilet 3, the toilet having a water tank 303 and a commode 304, the upper part of the commode 304 having an upper flushing port 301, the lower part of the commode 304 having a lower flushing port 302, and the water tank 303 having a toilet flushing valve 1 as described in any of the above.

[0066] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A noise-reducing toilet flush valve, installed in the toilet tank, characterized in that, include: The main body has a second water inlet channel, a second water outlet channel, a third water outlet channel, and a noise reduction water outlet channel. The second water inlet channel is connected to the outlet of a water pump used to draw water from the water tank. The second water outlet channel and the noise reduction water outlet channel are both connected to the upper flushing port provided at the top of the toilet bowl. The third water outlet channel is connected to the lower flushing port provided at the bottom of the toilet bowl. The noise reduction water outlet channel is kept in a normally open state with the second water inlet channel. A switching component is movably disposed on the main body to control the second water inlet channel to switchly connect with the second water outlet channel or the third water outlet channel; A float assembly, disposed on the main body, has a float that moves up and down with the water level in the water tank. When the float rises, the switching component controls the second water inlet channel to connect with the second water outlet channel. When the float falls, the switching component controls the second water inlet channel to connect with the third water outlet channel.

2. The toilet flush valve according to claim 1, characterized in that, The inlet end of the noise-reducing water outlet channel is connected to the second water inlet channel, the outlet end of the noise-reducing water outlet channel is connected to the second water outlet channel, and the noise-reducing water outlet channel is connected to the upper flushing port through the second water outlet channel.

3. The toilet flush valve according to claim 1, characterized in that, The flow cross-sectional area of ​​the noise-reducing water outlet channel is smaller than that of the second and third water outlet channels.

4. The toilet flush valve according to claim 1, characterized in that, The switching components include a first switching component and a second switching component. The first switching component is disposed between the second water inlet channel and the second water outlet channel to control the connection and disconnection between the second water inlet channel and the second water outlet channel. The second switching component is disposed between the second water inlet channel and the third water outlet channel to control the connection and disconnection between the second water inlet channel and the third water outlet channel. When the first switching component is in the connected position connecting the second water inlet channel and the second water outlet channel, the second switching component is in the disconnected position disconnecting the second water inlet channel and the third water outlet channel. When the first switching component is in the disconnected position disconnecting the second water inlet channel and the second water outlet channel, the second switching component is in the connected position connecting the second water inlet channel and the third water outlet channel.

5. The toilet flush valve according to claim 4, characterized in that, The main body is also provided with a first water inlet channel and a first water outlet channel. The first water inlet channel is connected to an external water source, and the first water outlet channel is connected to the inner cavity of the water tank. The toilet flushing valve also includes a water inlet assembly. The water inlet assembly is movably disposed on the main body to control the connection or disconnection of the first water inlet channel and the first water outlet channel. When the float moves up and down with the water level in the water tank, it is linked to the water inlet assembly to control the on / off state.

6. The toilet flush valve according to claim 5, characterized in that, The water inlet assembly adopts a first back pressure valve group, and the first switching assembly adopts a second back pressure valve group. The first back pressure valve group has a first pressure relief hole and a first lifting rod for controlling the opening and closing of the first pressure relief hole. The second back pressure valve group has a second pressure relief hole and a second lifting rod for controlling the opening and closing of the second pressure relief hole. The float controls the on / off of the first back pressure valve group and the second back pressure valve group respectively by linking the first lifting rod and the second lifting rod.

7. The toilet flush valve according to claim 6, characterized in that, The second switching assembly includes a piston and a return spring. When the second back pressure valve assembly is in the cut-off position, the piston moves under the water pressure of the second inlet channel to the connection position connecting the second inlet channel and the third outlet channel. When the second back pressure valve assembly is in the connection position, the piston moves under the elastic force of the return spring to the cut-off position cutting off the second inlet channel and the third outlet channel.

8. The toilet flush valve according to claim 1, characterized in that, The float assembly also includes a float cup fixed to the main body, the float is installed inside the float cup, the top of the float cup forms an opening, the bottom end is provided with a drain hole, and a one-way valve with buoyancy is provided at the drain hole. When the one-way valve floats up, it closes the drain hole, and when the one-way valve falls down, it opens the drain hole.

9. A toilet flushing device, comprising a toilet, the toilet having a water tank and a bowl, the upper part of the bowl having an upper flushing outlet, and the lower part of the bowl having a lower flushing outlet, characterized in that, The water tank is equipped with a toilet flushing valve as described in any one of claims 1-8.

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