Distribution valve with external pressure relief channel, toilet flushing system and toilet

Abstract

A distributing valve with an external pressure relief waterway is disclosed, comprising a valve body (10), a switching member (40) installed within the valve body (10), and a drive mechanism for operating the switching member (40). The valve body (10) is provided with a water inlet (101), a first water outlet (102), and a second water outlet (103). The switching member (40) is connected to the valve body (10) so as to be slidable by water pressure. The switching member (40) is used to control the first water outlet (102) and the second water outlet (103) so that they communicate with the water inlet (101). The valve body (10) is provided with a pressure relief waterway (70). The pressure relief port (701) of the pressure relief waterway (70) directly drains water to the outside of the valve body (10). When the pressure relief hole is opened and waterway switching is performed, a state in which the three waterways, the rim waterway, the injection waterway, and the pressure relief waterway, become connected to each other is avoided, which results in a slow switching speed or loss of switching function due to a small pressure difference between the pressure-receiving surfaces of the switching member. Also disclosed is a toilet flushing system and toilet that uses the dispensing valve.

Description

Technical Field

[0001] This application is based on a Chinese patent application filed with the China National Intellectual Property Administration on August 18, 2022, with an application number of 202210992643.3 and an invention title of "Distribution Valve with External Pressure Relief Waterway", and claims its priority. The disclosure content of the Chinese patent application is incorporated into this application in its entirety by reference.

[0002] The present invention relates to the technical field of waterway switching control, and particularly relates to a distribution valve with an external pressure relief waterway, a toilet flushing system, and a toilet.

Background Art

[0003] Commercially available general water pressure on-off valves usually mainly focus on opening and closing a single-function waterway. In the process of its application, the opening and closing of the valve body are realized by switching the pressure. Its structure and function are relatively single. It cannot well meet the needs of more waterway expansion functions. When multiple waterway functions are required, it is necessary to increase the corresponding number of valve bodies, which is inconvenient in application and occupies space.

[0004] Commercially available general water pressure-driven waterway switching valves usually mainly adopt a scheme of connecting the back pressure chamber to the water outlet to discharge the water flow generated in the pressure relief process for the pressure relief design of the back pressure chamber. This scheme is feasible for the opening and closing control of a single-function valve body. However, when it is used in a one-inlet multi-outlet switching valve that performs hydraulic control by itself, there are certain functional defects. That is, after the pressure relief starts, a state occurs where multiple water outlet waterways are connected to the pressure relief waterway. In this case, the pressure difference on the pressure-receiving surface of the switching valve core is small, and the chamber pressure difference is small. Therefore, the distribution switching of the waterway is affected, the switching speed is slow or even the switching function fails, and its switching stability is poor.

[0005] Therefore, improving the hydraulic switching stability of multiple waterway switching valves in hydraulic control is one of the directions to explore greater value of hydraulic control valves.

Summary of the Invention

[0006] To address the shortcomings of the prior art, the object of the present invention is to provide a distribution valve, a toilet flushing system, and a toilet having an external pressure relief channel. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides the following technical solution.

[0008] A distribution valve having an external pressure relief channel comprises a valve body, a switching member installed inside the valve body, and a drive mechanism for operating the switching member, wherein the valve body is provided with an inlet, a first outlet, and a second outlet, the switching member is slidably connected to the valve body by water pressure, the switching member is used to control the first and second outlets to communicate with the inlet, respectively, a pressure relief channel is provided in the drive mechanism or the valve body, the pressure relief port of the pressure relief channel drains directly to the outside of the valve body, and communication between the pressure relief port and the first and second outlets is avoided.

[0009] Furthermore, the switching member comprises an upper shut-off diaphragm, a lower shut-off diaphragm, and a slide rod, the upper shut-off diaphragm being fitted to one end of the slide rod, the lower shut-off diaphragm being fitted to the other end of the slide rod, the upper shut-off diaphragm dividing the valve body into a water supply chamber and a back pressure chamber, a pressure relief hole being provided in the back pressure chamber, the opening and closing of the pressure relief hole being controlled by the drive mechanism, the pressure relief hole communicating with the pressure relief water channel when open, the water supply chamber comprising a first chamber body and a second chamber body, the first chamber body communicating with the water supply port, and the second chamber The valve body communicates with the second outlet, the upper water-stopping diaphragm is provided with a narrow water hole that connects the first chamber body and the back pressure chamber, the second chamber body is provided with a first opening that communicates with the first chamber body, the opening and closing of the first opening is controlled by the upper water-stopping diaphragm, the slide rod is slidably drilled into the second chamber body and a portion of it is sealed out of the second chamber body and enters the first chamber body, the first chamber body is provided with a second opening that communicates with the first outlet, the opening and closing of the second opening is controlled by the lower water-stopping diaphragm.

[0010] Furthermore, when the pressure relief hole is closed, the water inlet communicates with the first water outlet, and when the pressure relief hole is open, the water inlet communicates with the second water outlet.

[0011] Furthermore, a fixing frame for engaging and connecting the upper water-stopping diaphragm is provided at one end of the slide rod, and a hollow, thin water column is provided at a position corresponding to the thin water hole of the fixing frame, and the hollow, thin water column penetrates the thin water hole.

[0012] Furthermore, the other end of the slide rod passes through the second opening, and the lower watertight diaphragm is located outside the second opening.

[0013] Furthermore, a seal ring is fitted onto the slide rod, and the seal ring seals tightly to the second chamber body when the slide rod exits the second chamber body.

[0014] Furthermore, the radial cross-section of the seal ring is V-shaped.

[0015] Furthermore, the drive mechanism is either a solenoid valve head or a mechanical switch.

[0016] Furthermore, the mechanical switch comprises a fixed bracket, a push rod, a transmission rod, and a reset spring, wherein the push rod is hinged to one end of the transmission rod to control the movement of the transmission rod; the fixed bracket is fixed to the valve body, the fixed bracket has an internal chamber, the other end of the transmission rod is located in the internal chamber and connected via a connecting block to a plug for opening and closing the pressure relief hole; and the reset spring is fitted outside the transmission rod and located in the internal chamber outside the connecting block and is used to reset the plug.

[0017] Furthermore, the solenoid valve head is equipped with a fixed bracket, the fixed bracket is fixed to the valve body, a coil assembly is provided within the fixed bracket, a movable core is movably provided on the coil assembly, and a plug for opening and closing the pressure relief hole is provided at one end of the movable core, and a reset spring is fitted outside the movable core and is used to reset the movable core.

[0018] The present invention further provides a toilet flushing system comprising a pump pressurized water supply pipe, an injection pipe, a rim pipe, and a distribution valve having an external pressure relief channel as described above. , the aforementioned One outlet is connected to the rim pipeline, and the second outlet is connected to the injection pipeline.

[0019] The present invention further provides a toilet comprising a toilet bowl and a toilet flushing system as described above, wherein the rim conduit communicates with a rim hole or rim nozzle installed at the top of the toilet bowl, and the spray conduit communicates with a spray port or spray nozzle installed at the bottom of the toilet bowl.

[0020] The beneficial effects of this invention are as follows:

[0021] The distribution valve having an external pressure relief channel according to the present invention can achieve a one-way and two-way water channel switching function by simply arranging a single drive mechanism. The sliding of the switching member enables the water inlet to communicate with the first outlet and the second outlet, respectively, thereby achieving water channel switching. At the same time, the pressure relief port of the pressure relief channel directly drains water to the outside of the valve body. When the pressure relief hole opens and water channel switching occurs, a state is created in which the three water channels—the rim channel, the injection channel, and the pressure relief channel—communicate with each other. This prevents the switching speed from being slow or the switching function from failing due to a small pressure difference between the pressure-receiving surfaces of the switching member.

[0022] The distribution valve having an external pressure relief channel according to the present invention employs a pilot valve structure, using the pressure difference on both sides of the upper shut-off diaphragm to move the slide rod up and down, and furthermore, the water inlet is connected to the first outlet and the second outlet, respectively, resulting in a highly reliable structure and easier operation. Additionally, a seal ring is fitted outside the slide rod, thereby enabling water channel switching by sliding the slide rod up and down, while simultaneously preventing communication between the second chamber and the first outlet.

[0023] The distribution valve, toilet flushing system, and toilet having an external pressure relief channel according to the present invention have a wide range of applications, as their drive mechanism can be selected from an electromagnetic valve head or a mechanical switch depending on the actual situation. [Brief explanation of the drawing]

[0024] To more clearly describe the embodiments of the present invention or the prior art, the following briefly describes the drawings necessary for use in the description of the embodiments or the prior art. Clearly, the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain further drawings based on these without requiring any creative effort.

[0025] [Figure 1]Exploded view of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 2] Schematic diagram of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 3] Schematic diagram of the pressure relief port of the external pressure relief water passage according to the present invention. [Figure 4] Top view of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 5] Cross-sectional view taken at the position B-B of FIG. 4. [Figure 6A] Schematic diagram of the water discharge of the first water outlet of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 6B] Cross-sectional view of the pressure relief water passage in the state of FIG. 6A (cross-sectional view taken at the position A-A of FIG. 3). [Figure 7A] Schematic diagram of the water discharge of the second water outlet of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 7B] Cross-sectional view of the pressure relief water passage in the state of FIG. 7A (cross-sectional view taken at the position A-A of FIG. 3). [Figure 8] Cross-sectional view of the switching member of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 9] Exploded view of the switching member of a distribution valve having an external pressure relief water passage according to the present invention. [Figure 10] Schematic diagram in which a solenoid valve head is adopted for the drive mechanism of a distribution valve having an external pressure relief water passage according to the present invention.

Explanation of reference numerals

[0026] 10- Valve body, 101- Water inlet, 102- First water outlet, 103- Second water outlet, 201- First chamber body, 202- Second chamber body, 301- First opening, 302- Second opening, 303- Back pressure chamber, 304- Pressure relief hole, 40- Switching member, 401- Slide rod, 402- Fixing frame, 4021- Hollow thin water column, 403- Upper water stop diaphragm, 4031- Thin water hole, 404- Lower water stop diaphragm, 405- Ring, 501-Mechanical switch, 5011-Fixing bracket-I, 5012-Push rod, 5013-Transmission rod, 5014-Reset spring-I, 5015-Connecting block, 5016-Plug-I, 601-Solenoid valve head, 6011-Fixing bracket-II, 6012-Movable iron core, 6013-Reset spring-II, 6014-Plug-II, 70-Pressure relief channel, 701-Pressure relief port. [Modes for carrying out the invention]

[0027] The present invention will be described in detail below with reference to Figures 1 to 10.

[0028] A distribution valve having an external pressure relief channel comprises a valve body 10, a switching member 40 installed within the valve body 10, and a drive mechanism for operating the switching member 40. The valve body 10 is provided with a water inlet 101, a first outlet 102, and a second outlet 103. The switching member 40 is slidably connected to the valve body 10 by water pressure and is used to control the first and second outlets 102 and 103 to communicate with the water inlet 101, respectively. A pressure relief channel 70 is provided in the valve body 10, and the pressure relief port 701 of the pressure relief channel 70 directly drains water to the outside of the valve body 10, preventing the pressure relief port 701 from communicating with the first and second outlets 102 and 103. The valve body 10 is assembled from multiple parts. In other embodiments, the pressure relief channel is provided in the drive mechanism.

[0029] In this embodiment, the forward and backward waterway switching function can be achieved by simply arranging one drive mechanism. The sliding of the switching member 40 causes the water inlet 101 to communicate with the first outlet 102 and the second outlet 103, respectively, thereby enabling waterway switching. At the same time, the pressure relief port 701 of the pressure relief waterway 70 directly drains water to the outside of the valve body 10. When the pressure relief hole 304 opens and waterway switching occurs, the rim waterway, the injection waterway, and the pressure relief waterway all communicate with each other. This prevents the switching speed from being slow or the switching function from failing due to a small pressure difference between the waterways.

[0030] In this embodiment, the switching member 40 comprises an upper shut-off diaphragm 403, a lower shut-off diaphragm 404, and a slide rod 401. The upper shut-off diaphragm 403 is fitted to one end of the slide rod 401, and the lower shut-off diaphragm 404 is fitted to the other end of the slide rod 401. The upper shut-off diaphragm 403 divides the valve body 10 into a water supply chamber and a back pressure chamber 303. A pressure relief hole 304 is provided in the back pressure chamber 303, and the opening and closing of the pressure relief hole 304 is controlled by a drive mechanism. The water supply chamber comprises a first chamber body 201 and a second chamber body 202. The first chamber body 201 communicates with the water inlet 101, and the second chamber body 202 communicates with the second water outlet 103. The upper water-stopping diaphragm 403 is provided with a narrow water hole 4031 that connects the first chamber body 201 and the back pressure chamber 303, the second chamber body 202 is provided with a first opening 301 that connects to the first chamber body 201, and the opening and closing of the first opening 301 is controlled by the upper water-stopping diaphragm 403, the slide rod 401 is slidably drilled into the second chamber body 202 and a portion of it is sealed out of the second chamber body 202 and enters the first chamber body 201, the first chamber body 201 is provided with a second opening 302 that connects to the first outlet 102, and the opening and closing of the second opening 302 is controlled by the lower water-stopping diaphragm 404.

[0031] In this embodiment, the slide rod 401 is moved up and down by utilizing the pressure difference on both sides of the upper water-stopping diaphragm 403, and the water inlet 101 is connected to the first outlet 102 and the second outlet 103, respectively. This provides a highly reliable structure and easier operation. Furthermore, a seal ring 405 is fitted outside the slide rod 401, thereby enabling the slide rod 401 to slide up and down to switch the water channels, while simultaneously preventing communication between the second chamber body 202 and the first outlet 102. Additionally, when the pressure relief hole 304 is closed, the water inlet 101 is connected to the first outlet 102, and when the pressure relief hole 304 is open, the water inlet 101 is connected to the second outlet 103.

[0032] In this embodiment, a fixed frame 402 is provided at one end of the slide rod 401 for engaging and connecting the upper water-stopping diaphragm 403, and a hollow, thin water column 4021 is provided at a position corresponding to the narrow water hole 4031 of the fixed frame 402, the hollow, thin water column 4021 passes through the narrow water hole 4031, preventing the narrow water hole 4031 from deforming and affecting the passage of water flow, the other end of the slide rod 401 passes through the second opening 302, and the lower water-stopping diaphragm 404 is located outside the second opening 302.

[0033] In this embodiment, a seal ring 405 is further fitted onto the slide rod 401, and the seal ring 405 is sealed and fitted to the second chamber body 202 when the slide rod 401 is drilled into the second chamber body 202. Furthermore, the radial cross-section of the seal ring 405 is V-shaped.

[0034] In this embodiment, the drive mechanism is a mechanical switch 501. The mechanical switch 501 comprises a fixed bracket-I 5011, a push rod 5012, a transmission rod 5013, and a reset spring-I 5014. The push rod 5012 is hinged to one end of the transmission rod 5013 to control the movement of the transmission rod 5013. The fixed bracket-I 5011 is fixed to the valve body 10 and has an internal chamber. The other end of the transmission rod 5013 is located in the internal chamber and connected via a connecting block 5015 to a plug-I 5016 for opening and closing the pressure relief hole 304. The reset spring-I 5014 is fitted outside the transmission rod 5013 and located in the internal chamber outside the connecting block 5015, and is used to reset the plug-I 5016.

[0035] In another embodiment, as shown in Figure 10, the solenoid valve head 601 is equipped with a fixed bracket-II 6011, which is fixed to the valve body 10, a coil assembly is provided within the fixed bracket-II 6011, a movable core 6012 is movably mounted on the coil assembly, and a plug-II 6014 for opening and closing a pressure relief hole 304 is provided at one end of the movable core 6012, and a reset spring-II 6013 is fitted outside the movable core 6012 and is used to reset the movable core 6012.

[0036] Example 1 When a mechanical switch 501 is used in the drive mechanism, when the push rod 5012 is not under pressure, i.e., plug-I 5016 closes the pressure relief hole 304 under the action of reset spring-I 5014, the external water source enters the valve body 10 via the water inlet 101 and enters the back pressure chamber 303 through the hollow thin water column 4021, thereby the pressure in the back pressure chamber 303 is greater than that in the water supply chamber, the slide rod 401 moves to the left, the upper shut-off diaphragm 403 seals the first opening 301, and at the same time, as shown in Figure 6A, the lower shut-off diaphragm 404 opens the second opening 302, connecting the water inlet 101 to the first outlet 102, at this time, as shown in Figure 6B, plug-I Because 5016 is blocking the pressure relief hole 304, the pressure relief channel 70 is not in communication with the back pressure chamber 303. When the push rod 5012 is subjected to pressure, the transmission rod 5013 is raised, and as shown in Figure 7A, this causes plug-I 5016 to open the pressure relief hole 304, and the pressure relief channel 70 to communicate with the back pressure chamber 303 through the pressure relief hole 304. As shown in Figure 7B, the pressure relief port 701 drains to the outside of the valve body 10, thereby increasing the pressure in the water supply chamber above that of the back pressure chamber 303. The slide rod 401 moves to the right, the lower shut-off diaphragm 404 seals the second opening 302, and at the same time, the upper shut-off diaphragm 403 opens the first opening 301, connecting the water supply port 101 to the second water outlet 103.

[0037] Example 2 When the solenoid valve head 601 is used in the drive mechanism, the principle of water channel switching is the same as in Embodiment 1, with only the method of driving the plug being different. That is, when the solenoid valve head 601 is not energized, i.e., the plug-II 6014 closes the pressure relief hole 304 under the action of the reset spring-II 6013, thereby the pressure in the back pressure chamber 303 is greater than that in the water supply chamber, causing the slide rod 401 to move to the left, the upper shut-off diaphragm 403 to seal the first opening 301, and at the same time, the lower shut-off diaphragm 404 opens the second opening 302, connecting the water supply port 101 to the first water outlet 102. When the solenoid valve head 601 is energized, the coil assembly attracts the movable iron core 6012, thereby opening the pressure relief hole 304, and the plug-II The 6014 is driven, and the pressure relief port 701 of the pressure relief channel 70 drains to the outside of the valve body 10, thereby increasing the pressure in the water supply chamber above that of the back pressure chamber 303, causing the slide rod 401 to move to the right, the lower shut-off diaphragm 404 to seal the second opening 302, and at the same time, the upper shut-off diaphragm 403 opens the first opening 301, connecting the water supply port 101 to the second water outlet port 103.

[0038] The toilet flushing system according to the present invention comprises a pump pressurized water supply pipe, an injection pipe, a rim pipe, and a distribution valve having an external pressure relief water channel as described above. , the aforementioned One outlet is connected to the rim conduit, and the second outlet is connected to the injection conduit. The pump pressurized water supply pipe may be connected to the outlet end of the pump, and the inlet end of the pump may be connected to the toilet water tank. When the pump is started, it draws water from the water tank and provides injection and / or rim discharge through the distribution valve.

[0039] The present invention further provides a toilet comprising a toilet bowl and a toilet flushing system as described above, wherein the rim conduit communicates with a rim hole or rim nozzle installed at the top of the toilet bowl, and the spray conduit communicates with a spray port or spray nozzle installed at the bottom of the toilet bowl.

[0040] The above embodiments are for illustrative purposes only, to illustrate the technical idea and features of the present invention, and their purpose is to enable those skilled in the art to understand and implement the present invention; the scope of protection of the present invention is not limited thereto. Any equivalent modification or alteration made in substance based on the spirit of the present invention should be included within the scope of protection of the present invention. [Industrial applicability]

[0041] The present invention provides a distribution valve, a toilet flushing system, and a toilet having an external pressure relief channel. The distribution valve comprises a valve body, a switching member installed inside the valve body, and a drive mechanism for operating the switching member. The valve body is provided with a water inlet, a first outlet, and a second outlet. The switching member is slidably connected to the valve body by water pressure. The switching member is used to control the first and second outlets to communicate with the water inlet, respectively. The valve body is provided with a pressure relief channel. The pressure relief port of the pressure relief channel drains water to the outside of the valve body. When the pressure relief hole opens and the channel is switched, a state occurs where the three channels—the rim channel, the injection channel, and the pressure relief channel—communicate with each other. This avoids a slow switching speed or loss of switching function due to a small pressure difference between the pressure-receiving surfaces of the switching member, thus providing good industrial practicality. The invention as described in the original claims of the patent application is listed below. [1] A distribution valve having an external pressure relief channel, comprising a valve body, a switching member installed inside the valve body, and a drive mechanism for operating the switching member, wherein the valve body is provided with a water inlet, a first water outlet, and a second water outlet, the switching member is slidably connected to the valve body by water pressure, the switching member is used to control the first water outlet and the second water outlet to communicate with the water inlet, the drive mechanism or the valve body is provided with a pressure relief channel, the pressure relief port of the pressure relief channel drains to the outside of the valve body, and communication between the pressure relief port and the first water outlet and the second water outlet is avoided. [2] The switching member comprises an upper shut-off diaphragm, a lower shut-off diaphragm, and a slide rod, the upper shut-off diaphragm being fitted to one end of the slide rod, the lower shut-off diaphragm being fitted to the other end of the slide rod, the upper shut-off diaphragm dividing the valve body into a water supply chamber and a back pressure chamber, a pressure relief hole being provided in the back pressure chamber, the opening and closing of the pressure relief hole being controlled by the drive mechanism, the pressure relief hole communicating with the pressure relief water channel when open, the water supply chamber comprising a first chamber body and a second chamber body, the first chamber body communicating with the water inlet, the second chamber body communicating with the second water outlet, and A distribution valve having an external pressure relief channel, characterized in that the upper water-stopping diaphragm is provided with a narrow water hole that connects the first chamber body and the back pressure chamber, the second chamber body is provided with a first opening that connects to the first chamber body, the opening and closing of the first opening is controlled by the upper water-stopping diaphragm, the slide rod is slidably drilled into the second chamber body and a portion of the slide rod is sealed out of the second chamber body and enters the first chamber body, the first chamber body is provided with a second opening that connects to the first outlet, the opening and closing of the second opening is controlled by the lower water-stopping diaphragm. [3] A distribution valve having an external pressure relief channel, characterized in that when the pressure relief hole is closed, the water inlet communicates with the first water outlet, and when the pressure relief hole is open, the water inlet communicates with the second water outlet. [2] [4] A distribution valve having an external pressure relief channel, characterized in that a fixed frame for engaging and connecting the upper water-stopping diaphragm is provided at one end of the slide rod, a hollow, thin water column is provided at a position corresponding to the thin water hole of the fixed frame, and the hollow, thin water column penetrates the thin water hole. [5] A distribution valve having an external pressure relief channel, characterized in that the other end of the slide rod passes through the second opening and the lower water-stopping diaphragm is located outside the second opening, [2]. [6] A distribution valve having an external pressure relief channel, characterized in that a seal ring is further fitted to the slide rod, and the seal ring is sealed to the second chamber body when the slide rod exits the second chamber body. [2] [7] A distribution valve having an external pressure relief channel, characterized in that the radial cross-section of the seal ring is V-shaped. [6] [8] A distribution valve having one external pressure relief channel from any one of [2] to [7], characterized in that the drive mechanism is a solenoid valve head or a mechanical switch. [9] The distribution valve having an external pressure relief channel of [8] is characterized in that the mechanical switch comprises a fixed bracket, a push rod, a transmission rod, and a reset spring, the push rod being hinged to one end of the transmission rod to control the transmission rod to move, the fixed bracket being fixed to the valve body, the fixed bracket having an internal chamber, the other end of the transmission rod being located in the internal chamber and connected via a connecting block to a plug for opening and closing the pressure relief hole, and the reset spring being fitted outside the transmission rod and located in the internal chamber outside the connecting block and used to reset the plug.

[10] A distribution valve having an external pressure relief channel, characterized in that the solenoid valve head is provided with a fixed bracket, the fixed bracket is fixed to the valve body, a coil assembly is provided within the fixed bracket, a movable core is movably provided on the coil assembly, and a plug for opening and closing the pressure relief hole is provided at one end of the movable core, and a reset spring is fitted outside the movable core and used for resetting the movable core, [8]

[11] A toilet flushing system comprising a pump pressurized water supply pipe, an injection pipe, and a rim pipe, further comprising a distribution valve having one of the external pressure relief water channels [1] to

[10] , wherein the water inlet is connected to the pump pressurized water supply pipe, the first water outlet is connected to the rim pipe, and the second water outlet is connected to the injection pipe.

[12] A toilet comprising a toilet bowl, further comprising a toilet flushing system

[11] , wherein the rim conduit communicates with a rim hole or rim nozzle installed at the top of the toilet bowl, and the spray conduit communicates with a spray port or spray nozzle installed at the bottom of the toilet bowl.

Claims

1. A distribution valve comprising a valve body, a switching member installed inside the valve body, and a drive mechanism for operating the switching member, wherein the valve body has an external pressure relief channel provided with a water inlet, a first water outlet, and a second water outlet, the switching member is slidably connected to the valve body by water pressure, the switching member is used to control the first water outlet and the second water outlet to communicate with the water inlet, the drive mechanism or the valve body is provided with a pressure relief channel, the pressure relief port of the pressure relief channel drains to the outside of the valve body, and when the pressure relief port drains to the outside of the valve body, the pressure relief port does not communicate with the first water outlet and the second water outlet. The switching member comprises an upper shut-off diaphragm, a lower shut-off diaphragm, and a slide rod, the upper shut-off diaphragm being fitted to one end of the slide rod, the lower shut-off diaphragm being fitted to the other end of the slide rod, the upper shut-off diaphragm dividing the valve body into a water supply chamber and a back pressure chamber, a pressure relief hole being provided in the back pressure chamber, the opening and closing of the pressure relief hole being controlled by the drive mechanism, the pressure relief hole communicating with the pressure relief water channel when open, the water supply chamber comprising a first chamber body and a second chamber body, the first chamber body communicating with the water inlet, and the second chamber body communicating with the second water outlet. A distribution valve having an external pressure relief channel, characterized in that the upper water-stopping diaphragm is provided with a narrow water hole that connects the first chamber body and the back pressure chamber, the second chamber body is provided with a first opening that connects to the first chamber body, the opening and closing of the first opening is controlled by the upper water-stopping diaphragm, the slide rod is slidably drilled into the second chamber body and a portion of the slide rod is sealed out of the second chamber body and enters the first chamber body, the first chamber body is provided with a second opening that connects to the first outlet, the opening and closing of the second opening is controlled by the lower water-stopping diaphragm.

2. A distribution valve having an external pressure relief channel according to claim 1, characterized in that when the pressure relief hole is closed, the water inlet communicates with the first water outlet, and when the pressure relief hole is open, the water inlet communicates with the second water outlet.

3. A distribution valve having an external pressure relief channel according to claim 1, characterized in that a fixed frame for engaging and connecting the upper water-stopping diaphragm is provided at one end of the slide rod, a hollow, thin water column is provided at a position corresponding to the thin water hole of the fixed frame, and the hollow, thin water column penetrates the thin water hole.

4. The distribution valve having an external pressure relief channel according to claim 1, characterized in that the other end of the slide rod passes through the second opening and the lower water-stopping diaphragm is located outside the second opening.

5. A distribution valve having an external pressure relief channel according to claim 1, characterized in that a seal ring is further fitted to the slide rod, and the seal ring is sealed to the second chamber body when the slide rod exits the second chamber body.

6. The distribution valve having an external pressure relief channel according to claim 5, characterized in that the radial cross-section of the seal ring is V-shaped.

7. A distribution valve having an external pressure relief channel according to any one of claims 1 to 6, characterized in that the drive mechanism is a solenoid valve head or a mechanical switch.

8. The distribution valve having an external pressure relief channel according to claim 7, characterized in that the mechanical switch comprises a fixed bracket, a push rod, a transmission rod, and a reset spring, wherein the push rod is hinged to one end of the transmission rod to control the transmission rod to move, the fixed bracket is fixed to the valve body, the fixed bracket has an internal chamber, the other end of the transmission rod is located in the internal chamber and connected via a connecting block to a plug for opening and closing the pressure relief hole, and the reset spring is fitted outside the transmission rod and located in the internal chamber outside the connecting block and is used to reset the plug.

9. The distribution valve having an external pressure relief channel according to claim 7, characterized in that the solenoid valve head is provided with a fixed bracket, the fixed bracket is fixed to the valve body, a coil assembly is provided within the fixed bracket, a movable core is movably provided on the coil assembly, and a plug for opening and closing the pressure relief hole is provided at one end of the movable core, and a reset spring is fitted outside the movable core and used for resetting the movable core.

10. A toilet flushing system comprising a pump pressurized water supply pipe, an injection pipe, and a rim pipe, further comprising a distribution valve having an external pressure relief water channel as described in any one of claims 1 to 6, wherein the water inlet is connected to the pump pressurized water supply pipe, the first water outlet is connected to the rim pipe, and the second water outlet is connected to the injection pipe.

11. A toilet equipped with a toilet bowl, further comprising the toilet flushing system according to claim 10, wherein the rim pipe communicates with a rim hole or rim nozzle installed at the top of the toilet bowl, and the spray pipe communicates with a spray port or spray nozzle installed at the bottom of the toilet bowl.

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