A kind of steady voltage water inlet assembly, pressure flushing system and closestool

Abstract

The application provides a kind of steady voltage water inlet assembly, pressure flushing system and closestool, the steady voltage water inlet assembly includes steady voltage valve body group, inside water flow passage, outside water source interface and flushing valve interface are communicated.The water flow passage is provided with opening and closing assembly in the direction of water source interface, opening and closing assembly includes first elastic member, valve rod and sealing pad, water flow pressure of water source interface acts on valve rod, so that valve rod is movable to abut sealing pad along axial direction, first elastic member is used to keep valve rod to be staggered with sealing pad position, realizes the steady voltage function of water inlet.Water flow passage is provided with first check valve and first venturi valve in the direction of flushing valve interface in turn, steady voltage valve body group is provided with air inlet for being used to connect water flow passage with outside, air inlet is arranged in the side of first venturi valve diameter shrink section, and external air is introduced and mixed with water flow by using venturi effect.The application integrates steady voltage and venturi air suction function, reduces external pipeline connection node, and reduces the risk of leakage.

Description

Technical Field

[0001] This invention relates to the field of pressure regulating valve technology, specifically to a pressure regulating water inlet assembly, a pressure flushing system, and a toilet. Background Technology

[0002] Pressure regulating valves are widely used in water supply systems, sanitary ware, and various fluid control devices to regulate the pressure of the input water source, ensuring a stable output water pressure and thus guaranteeing the normal operation of downstream water-using equipment. Taking a toilet flushing system as an example, the pressure regulating valve is usually installed between the water source and the flushing valve. It stabilizes the external water supply pressure before supplying it to the flushing valve and other actuators to ensure consistent flushing performance.

[0003] A Venturi valve is a fluid control element that operates based on the Venturi effect. It utilizes the principle that fluid velocity increases and pressure decreases as it flows through a constriction section to achieve functions such as negative pressure intake and flow regulation. In water supply systems, Venturi valves have been used for purposes such as air mixing and pressure regulation. However, in these applications, Venturi tubes or valves are often independently installed in the external piping of pressure-regulating valves, or used only as auxiliary components of pressure-regulating valves. They are not designed as integrated functional components within the pressure-regulating valve itself. For example, Chinese patent document CN121593528A discloses a pressure flushing system and toilet.

[0004] Existing pressure regulating valves have relatively limited functions, mainly limited to pressure regulation, and cannot simultaneously meet multiple functional requirements such as pressure stabilization, air intake, and multiple outputs. In applications requiring both pressure stabilization and Venturi air intake, a Venturi valve or tube is typically connected externally to the pressure regulating valve, resulting in complex piping, large space occupation, inconvenient installation, and increased risks of leakage and pressure loss. Therefore, it is necessary to improve the structure of existing pressure regulating valves by integrating the Venturi valve into the pressure regulating valve body assembly, thereby achieving a compact and functionally integrated pressure regulating water inlet component. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a pressure-stabilizing water inlet component, a pressure flushing system and a toilet to solve the problems mentioned in the background section above.

[0006] This invention is achieved through the following technical solution: A pressure-stabilizing water inlet assembly includes a pressure-stabilizing valve body assembly, wherein a water flow channel is formed inside the pressure-stabilizing valve body assembly, and the water flow channel is provided with a water source interface and a flushing valve interface that communicate with the outside. An opening and closing assembly is provided in the water flow channel and facing the water source interface. The opening and closing assembly includes a first elastic element, a valve stem and a sealing gasket. The water pressure of the water flow entering from the water source interface acts on the valve stem, so that the valve stem can move along its axial direction to abut against the sealing gasket. The first elastic element is used to keep the valve stem offset from the sealing gasket. A first check valve and a first venturi valve are sequentially arranged in the water flow channel and toward the flushing valve interface. The pressure stabilizing valve body assembly has an air inlet for connecting the water flow channel to the outside. The air inlet is arranged on the side of the constricted section of the first venturi valve.

[0007] On the other hand, the present invention provides a pressure flushing system, including a flushing valve body, a water outlet box body, a switching valve body, and a pressure-stabilizing water inlet assembly as described in any of the above claims. The flushing valve body includes a water-proof surface and a diaphragm assembly. The diaphragm assembly is used to divide the internal chamber of the flushing valve body into a balance chamber and a drain chamber. A water-passing chamber is also formed inside the flushing valve body. When water enters the balance chamber, the diaphragm assembly abuts against the water-proof surface to isolate the water passage chamber and the water discharge chamber; When the balance chamber is depressurized and drained, the diaphragm assembly disengages from the water-proof surface, and the water passage chamber and the drain chamber become connected. The flushing valve interface is connected to the water passage chamber, the balancing chamber interface is connected to the balancing chamber, the switch valve interface is connected to the switch valve body, and the switch valve body controls the external water source to supply water to the water source interface. The water passage chamber is connected to the water outlet box.

[0008] On the other hand, the present invention provides a toilet including the pressure flushing system described above.

[0009] The beneficial effects of this invention are as follows: Firstly, existing pressure regulating valves have a single function, only regulating pressure. If a venturi suction function is also required, a separate venturi valve or venturi tube must be connected externally to the pressure regulating valve, resulting in complex piping, large space occupation, and inconvenient installation of the entire water inlet system. This invention integrates the first one-way valve and the first venturi valve directly into the water flow channel inside the pressure regulating valve body assembly, and positions the air inlet on the side of the reduced diameter section of the first venturi valve. This integrates both pressure regulating and suction functions into a single valve body component, eliminating the need for an external venturi tube. This integrated design significantly simplifies the system piping layout, saves installation space, and reduces assembly difficulty, making it particularly suitable for applications with limited installation space, such as bathroom fixtures.

[0010] Secondly, in existing technologies, external Venturi valves require multiple pipeline sections and connection joints between the pressure regulating valve and the Venturi valve. Each connection node is a potential leakage point, and the extended pipeline increases the friction resistance of the water flow, causing unnecessary pressure loss. This invention integrates the first Venturi valve within the pressure regulating valve assembly. After pressure stabilization, the water flows directly into the first Venturi valve inside the valve body, without needing to pass through external pipelines. This structure significantly reduces the number of pipeline connection nodes, fundamentally reducing the risk of leakage, while also avoiding friction pressure loss of the water flow in external pipelines, ensuring sufficient working pressure for the downstream flushing water equipment.

[0011] Thirdly, the opening and closing assembly of this invention achieves adaptive adjustment of the inlet water pressure through the cooperation of the first elastic element, the valve stem, and the sealing gasket. When the inlet water pressure is too high, the valve stem moves to press against the sealing gasket to block the water flow channel, preventing high-pressure water from directly impacting the rear valve body and pipeline. When the inlet water pressure decreases, the valve stem resets under the action of the first elastic element, restoring water supply. This pressure stabilization mechanism ensures that the water flow pressure through the first Venturi valve remains within a relatively stable range, thereby ensuring stable water flow velocity and uniform air intake in the constricted section of the Venturi valve, ultimately maintaining a consistent gas-liquid mixing ratio. Users can obtain stable and efficient flushing effects under various time periods and operating conditions, avoiding the problem of fluctuating flushing effects caused by water pressure fluctuations. Attached Figure Description

[0012] Figure 1 This is a perspective view of the pressure-stabilizing water inlet assembly of the present invention.

[0013] Figure 2 for Figure 1 The diagram shows a cross-section along the AA direction, with the arrows indicating the water flow direction during the standby water replenishment phase.

[0014] Figure 3 for Figure 1 The diagram shows a cross-section along the AA direction, with the arrows indicating the water flow direction during the electrically controlled water outlet phase.

[0015] Figure 4 for Figure 1 Sectional view along the BB direction.

[0016] Figure 5 This is a three-dimensional view of the pressure regulating valve body.

[0017] Figure 6 This is an exploded view of the pressure-stabilizing water inlet assembly of the present invention.

[0018] Figure 7 This is a perspective view of the flushing valve body of the present invention.

[0019] Figure 8 for Figure 8 Sectional view along the AA direction.

[0020] Figure 9 for Figure 8 Sectional view along the BB direction.

[0021] Figure 10 This is a perspective view of the water outlet box body of the present invention.

[0022] Figure 11 This is an exploded view of the water outlet box body of the present invention.

[0023] Figure 12 This is a cross-sectional view of the water outlet box body of the present invention along the secondary water inlet interface.

[0024] Figure 13 This is a perspective view of the switching valve body of the present invention.

[0025] Figure 14 This is an exploded view of the switching valve body of the present invention.

[0026] Figure 15 This is a centered sectional view of the switch valve body of the present invention. The arrows in the figure indicate the direction of water flow during the electrically controlled opening and water dispensing stage.

[0027] Figure 16 This is a centered sectional view of the switch valve body of the present invention. The arrows in the figure indicate the direction of water flow during the abnormal overpressure protection stage.

[0028] Figure 17 This is a centered sectional view of the switch valve body of the present invention. The arrows in the figure indicate the direction of water flow during the manual pressure relief and water discharge stage.

[0029] Figure 18 This is a three-dimensional view of the pressure flushing system.

[0030] Figure 19 This is a three-dimensional view of the pressure flushing system from another perspective.

[0031] The above figures include the following reference numerals: 1. Pressure-stabilizing water inlet assembly; 11. Pressure-stabilizing valve body assembly; 11a. Water flow channel; 11b. Water source interface; 11c. Flushing valve interface; 11d. Balance chamber interface; 11e. Switch valve interface; 11f. Air inlet; 111. Pressure-stabilizing valve body; 1111. Recessed groove; 112. Pressure-stabilizing valve cover; 113. Pressure-stabilizing valve plug; 114. Pressure-stabilizing water nozzle; 12. Opening and closing assembly; 121. First elastic element; 122. Valve stem; 123. Sealing gasket; 124. Adjusting cover; 13. First one-way valve; 14. First venturi valve; 15. Second venturi valve; 16. One-way seal 1. Seal; 161. Sealing section; 162. Flared section; 17. Second check valve; 18. Third check valve; 2. Flushing valve body; 21. Diaphragm assembly; 22. Flushing valve body; 221. Water-retaining ring; 2211. Water-proof surface; 222. Pressure port; 223. First inlet port; 224. First outlet port; 23. Flushing valve cover; 231. Differential pressure balance port; 24. Pressure vessel; 2a. Balance chamber; 2b. Drain chamber; 2c. Water passage chamber; 3. Switch valve body; 31. Switch valve assembly; 311. Switch valve body; 3111. First water-stop surface; 311 2. Second water-stop surface; 3113. Water-blocking part; 312. Switch valve cover; 313. Water outlet; 31a. Water inlet path; 31b. Water outlet path; 31c. Pressure relief buffer path; 31d. Back pressure chamber; 31e. Transition chamber; 31f. Second through hole; 31g. Third through hole; 31h. Fourth through hole; 31i. Annular cavity; 32. First diaphragm assembly; 321. First through hole; 322. First diaphragm; 323. First support; 33. Second diaphragm assembly; 331. Second diaphragm; 332. Second support; 3321. Water passage groove; 333. Second elastic element; 3 4. Solenoid valve body; 341. Telescopic end; 35. Manual control valve; 4. Water outlet box body; 4a. First chamber; 4b. Second chamber; 4c. Siphon port; 4d. Pressure relief port; 4e. Second water outlet port; 4f. Main water inlet port; 4g. Secondary water inlet port; 41. Water outlet box check valve; 42. First partition; 421. Insert plate; 43. Separator; 431. Guide surface; 432. Water passage hole; 433. Water-blocking protrusion; 44. Second partition; 5a. First pipe; 5b. Second pipe; 5c. Third pipe; 5d. Fourth pipe; 5e. Fifth pipe. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1 Reference Figures 1 to 6 As shown, a pressure-stabilizing water inlet assembly 1 includes a pressure-stabilizing valve body assembly 11. The pressure-stabilizing valve body assembly 11 is a valve body structure that is integrally cast or assembled and sealed in parts. Its interior is hollowed out to form a through water flow channel 11a, which connects to multiple external interfaces according to functional zones. Specifically, the pressure-stabilizing valve body assembly 11 includes a pressure-stabilizing valve body 111, a pressure-stabilizing valve cover 112 and a pressure-stabilizing valve plug 113 that are sealed to the pressure-stabilizing valve body 111 with screws, and a pressure-stabilizing water nozzle 114 connected to the water outlet end of the pressure-stabilizing valve body 111.

[0034] The water flow channel 11a connects to multiple external interfaces according to functional zones, specifically including a water source interface 11b, a flush valve interface 11c, a balance chamber interface 11d, and a switch valve interface 11e; the water source interface 11b is used to connect to the municipal water source, the flush valve interface 11c is used to connect to the water passage chamber 2c of the flush valve body 2, the balance chamber interface 11d is used to connect to the balance chamber 2a of the flush valve body 2, and the switch valve interface 11e is used to connect to the water inlet flow path 31a of the switch valve body 3.

[0035] Specifically, an opening and closing assembly 12 is installed inside the water flow channel 11a on the inner side of the water source interface 11b. The opening and closing assembly 12, as the core structure of the water inlet adaptive pressure stabilization, includes a first elastic element 121, a valve stem 122, a sealing gasket 123, and an adjusting cover 124. The sealing gasket 123 is fixedly embedded in the inner wall step of the water flow channel 11a, that is, the sealing gasket 123 is sandwiched between the pressure stabilizing valve body 111 and the pressure stabilizing valve plug 113. The sealing gasket 123 is preferably made of rubber. The valve stem 122 slides back and forth along its own axis. The valve stem 122 has a stop surface. When the valve stem 122 moves to abut the stop surface, the municipal water source stops entering the water flow channel 11a.

[0036] The adjusting cover 124 is threaded into the inside of the pressure stabilizing valve cover 112, allowing it to be axially movable along the valve stem 122 at the end of the pressure stabilizing valve body assembly 11. The first elastic element 121 is preferably a spring, with both ends of the spring abutting against the adjusting cover 124 and the valve stem 122. By rotating the adjusting cover 124, the depth of the adjusting cover 124 inserted into the pressure stabilizing valve body assembly 11 can be changed, thereby adjusting the compression of the spring and achieving precise adjustment of the opening and closing pressure threshold of the valve stem 122. The spring force is used to keep the valve stem 122 in a position offset from the sealing gasket 123 under normal conditions, ensuring normal water flow. The greater the spring force, the greater the inlet water pressure threshold required to push the valve stem 122 to seal the sealing gasket 123, allowing for flexible adaptation of the opening and closing pressure according to the actual water supply conditions. During use, the water flow entering through the water source interface 11b generates water pressure and continuously acts on the valve stem 122. When the incoming water pressure overcomes the spring force, it can push the valve stem 122 to move along its own axis toward the sealing gasket 123, ultimately causing the end of the valve stem 122 to tightly abut against the sealing gasket 123, blocking the water flow channel 11a, and preventing excessively high-pressure municipal water flow from directly entering the water flow channel 11a, which could cause high-pressure impact damage to the downstream valve body structure, pipelines, and water-using equipment.

[0037] Inside the water flow channel 11a on the inner side of the flush valve interface 11c, a first check valve 13 and a first venturi valve 14 are sequentially installed along the water flow direction. The first check valve 13 only allows water to flow from inside the valve body to the flush valve interface 11c. The first venturi valve 14 is fixedly installed downstream of the first check valve 13, and its constricted section sidewall corresponds to the air inlet 11f of the pressure stabilizing valve body assembly 11. The air inlet 11f penetrates the sidewall of the pressure stabilizing valve body 111 and connects to the external atmosphere. When water flows through the constricted section of the first venturi valve 14, according to the Venturi effect, the water flow velocity in the constricted section increases and the air pressure decreases. External air is introduced through the air inlet 11f, breaking the negative pressure inside the water flow channel 11a. At the same time, it can enhance the turbulence effect of the flushing water flow. After the switch valve body 3 is opened, it works with the flush valve body 2 and the water outlet box body 4 to achieve efficient flushing of the pipeline, remove the sediment and impurities deposited in the channel, and avoid pipeline blockage. The first check valve 13 can prevent backflow within the pressure vessel 24.

[0038] A second check valve 17 is provided at the air inlet 11f, which can effectively prevent fluid from flowing back from the air inlet 11f (i.e., reference). Figure 2 (As indicated by the yellow arrow in the middle).

[0039] A third one-way valve 18 is provided in the water flow channel 11a inside the water source interface 11b to prevent the water flow in the water flow channel 11a from flowing back and mixing with the municipal water source.

[0040] A second Venturi valve 15 is fixedly installed in the water flow channel 11a inside the switch valve interface 11e. Specifically, one end of the second Venturi valve 15 faces the water source interface 11b. The balance chamber interface 11d is arranged on the side of the radial contraction section of the second Venturi valve 15. When water flows through, a stable negative pressure is generated, so that the water pressure in the balance chamber 2a of the flushing valve body 2 flows quickly through the switch valve interface 11e to the switch valve body 3, so that the diaphragm assembly 21 can quickly detach from the water-proof surface 2211. The water passage chamber 2c and the drain chamber 2b are connected, and the system starts to discharge water, thereby ensuring the response efficiency of the pressure flushing system.

[0041] It also includes a one-way seal 16, which is an integral rubber sealing structure. The one-way seal 16 has a trumpet-shaped structure and includes an integrally formed sealing section 161 and a flared section 162. The inner diameter of the sealing section 161 is interference-fitted with the outer circumference of the second venturi valve 15 and tightly fitted to the outside of the second venturi valve 15. The outer wall of the sealing section 161 is completely sealed and abutted against the inner wall of the water flow channel 11a, blocking the bypass flow of water and preventing the water flow at the switch valve interface 11e from flowing back to the water source interface 11b.

[0042] The flared section 162 extends outward from the end of the sealing section 161, widening in diameter. The flared section 162 extends towards the switch valve interface 11e. An annular gap with a gradually increasing diameter is formed between the inner side of the flared section 162 and the outer wall of the second venturi valve 15. Because the diameter of the annular gap gradually changes, the rates of the forward and reverse flow of water are inconsistent. This results in the water flow rate from the balance chamber interface 11d to the switch valve interface 11e being greater than the water flow rate from the switch valve interface 11e to the balance chamber interface 11d. (Refer to...) Figure 3 As indicated by the dark green arrow, when the flushing action of the pressure flushing system ends, the residual water inside the valve body needs to slowly flow back to the balance chamber 2a of the flushing valve body 2 through the balance chamber interface 11d, so that the diaphragm assembly 21 can gradually re-abut against the water-proof surface 2211 and complete the smooth water stop reset action.

[0043] The throttling and flow-limiting effect of the gradually changing gap in the flared section 162 can effectively slow down the rate at which water flows back to the balance chamber 2a, thereby precisely extending the valve closing time of the diaphragm assembly 21 and achieving controllable adjustment of the water output per flush. The delayed-closing valve structure offers several technical advantages: First, it allows for precise matching of the water volume per flush according to operating conditions, avoiding insufficient flushing water and incomplete rinsing of dirt caused by instantaneous rapid valve closure, ensuring stable and compliant flushing results. Second, it eliminates the water hammer effect caused by high-pressure rapid valve closure, effectively buffering instantaneous pressure shocks in the pipeline, reducing fatigue wear on various pipeline connection nodes and seals, and significantly improving the overall service life and operational stability of the machine. Third, it achieves quantitative water saving through delayed water control, avoiding excessive water waste in a single flush, and adapting to the design requirements of water-saving bathroom equipment. Fourth, it enables the diaphragm assembly 21 to smoothly reset and close, avoiding abnormal opening and closing noises, seal misalignment, and leakage caused by frequent hard impacts on the valve core and diaphragm, significantly improving the smoothness of equipment opening and closing and sealing reliability.

[0044] The pressure-stabilizing valve body assembly 11 has a recessed groove 1111 extending along the flared section 162. This recessed groove 1111 serves as a water flow rate regulation structure. When water flows from the balance chamber interface 11d to the switch valve interface 11e, the water can flow bidirectionally through the recessed groove 1111 and the inner gap of the flared section 162, resulting in a large water flow cross-section, low resistance, and a fast water flow rate. When water flows from the switch valve interface 11e to the balance chamber interface 11d, if the water flow causes the flared section 162 to abut against the inner wall of the water flow channel 11a, the recessed groove 1111 prevents the water path from being completely blocked. The water flow at the switch valve interface 11e can flow to the balance chamber interface 11d through the recessed groove 1111. This structural design can stably form a bidirectional water flow rate difference, achieving the effect of rapid forward pressure stabilization and water supply, and slow reverse pressure relief and return flow, precisely matching the working conditions of the diaphragm assembly 21's delayed reset valve closure.

[0045] Example 2 The present invention provides a pressure flushing system, which includes a flushing valve body 2, a water outlet box body 4, a switching valve body 3, and the aforementioned pressure stabilizing water inlet assembly 1.

[0046] Reference Figures 7 to 9 As shown, regarding the flush valve body 2: The flushing valve body 2 includes a water-proof surface 2211 and a diaphragm assembly 21. The diaphragm assembly 21 is used to divide the internal chamber of the flushing valve body 2 into a balance chamber 2a and a drain chamber 2b. A water-passing chamber 2c is also formed inside the flushing valve body 2.

[0047] The balancing chamber 2a and the drain chamber 2b are stacked vertically, and the water passage chamber 2c is arranged around the drain chamber 2b. Specifically, in this embodiment, the balancing chamber 2a is located above the drain chamber 2b, and the water passage chamber 2c is annular and arranged around the drain chamber 2b. Through this three-dimensional and compact chamber layout, the flow path of water in the valve body is significantly shortened, and it can reach the first outlet port 224 from the first inlet port 223 without multiple turns.

[0048] Reference Figure 8 As shown, when water enters the balancing chamber 2a, the water pressure inside the balancing chamber 2a increases, pushing the diaphragm assembly 21 upward and abutting the water-blocking surface 2211, thereby isolating the water passage chamber 2c and the drain chamber 2b. The flushing valve is in the closed state, and water cannot flow from the water passage chamber 2c into the drain chamber 2b for discharge. When the balancing chamber 2a depressurizes and drains water, the water pressure inside the balancing chamber 2a decreases. Under the action of the incoming water pressure, the diaphragm assembly 21 moves downward and disengages from the water-blocking surface 2211. The water passage chamber 2c and the drain chamber 2b become connected, the flushing valve is in the open state, and water flows from the water passage chamber 2c into the drain chamber 2b and is discharged through the first outlet port 224.

[0049] The water passage chamber 2c is connected to a pressure port 222 and a first water inlet port 223 along the first plane direction. Specifically, in this embodiment, the first plane direction is horizontal, and the pressure port 222 and the first water inlet port 223 are both arranged parallel to the horizontal plane on the side of the flushing valve body 22, thereby further reducing the number of times the water flow changes and minimizing pressure loss.

[0050] The pressure port 222 is connected to the pressure vessel 24 and is used to store the gas-liquid mixture delivered by the pressure regulating valve body assembly 11 through the flushing valve port 11c. The first water inlet port 223 is connected to the flushing valve port 11c of the pressure regulating valve body assembly 11 through the fifth pipe 5e. External water flows through the water source port 11b of the pressure regulating valve body assembly 11, the first venturi valve 14, the flushing valve port 11c into the first water inlet port 223 of the flushing valve body 2, through the water passage chamber 2c, and then into the pressure vessel 24.

[0051] The first water outlet 224 is connected to the main water inlet 4f of the water outlet box body 4 through the first pipe 5a, so that the water in the pressure vessel 24 flows through the water chamber 2c, the first water outlet 224, the first pipe 5a, and the main water inlet 4f into the second chamber 4b, and finally outputs through the second water outlet 4e of the water outlet box body 4 to perform the toilet flushing action.

[0052] The balancing chamber 2a is connected to a differential pressure balancing interface 231 along the first plane. The differential pressure balancing interface 231 is connected to the balancing chamber interface 11d of the pressure stabilizing valve body assembly 11 through the fifth pipe 5e. By opening and closing the switch valve body 3, the pressure relief and pressure maintenance water replenishment conditions of the balancing chamber 2a can be precisely controlled: when the switch valve body 3 is open, the balancing chamber 2a is quickly depressurized through the pressure stabilizing water inlet assembly 1, the diaphragm assembly 21 disengages from the water-proof surface 2211, and the system starts flushing water; when the switch valve body 3 is closed, the external water source continuously replenishes water and maintains pressure to the balancing chamber 2a through the pressure stabilizing water inlet assembly 1, driving the diaphragm assembly 21 to reset and abut against the water-proof surface 2211, and the system shuts off water, thereby achieving precise and stable control of flushing start and stop.

[0053] Preferably, the first plane direction and the second direction are arranged perpendicularly, that is, the first plane direction is horizontal and the second direction is vertically upward. This vertical arrangement ensures that the interfaces do not interfere with each other in space, reduces the number of times the water flow changes direction within the valve body, and minimizes pressure loss.

[0054] The flushing valve body 2 includes a flushing valve body 22 and a flushing valve cover 23. A diaphragm assembly 21 is sandwiched between the flushing valve body 22 and the flushing valve cover 23. The flushing valve body 22, the diaphragm assembly 21, and the flushing valve cover 23 are stacked vertically in sequence. This vertical stacking arrangement results in a simple and clear structure with fewer parts, convenient assembly, and reduced manufacturing costs while improving production efficiency. Specifically, the diaphragm assembly 21 includes a support and a diaphragm. The support is made of rigid plastic, and the diaphragm is made of rubber. The diaphragm is fastened to the support.

[0055] A water-retaining ring 221 is formed vertically on the flushing valve body 22. The radial end face of the water-retaining ring 221 forms a water-blocking surface 2211, the outer peripheral area of ​​the water-retaining ring 221 forms a water-passing chamber 2c, and the inner peripheral area of ​​the water-retaining ring 221 forms a water-draining chamber 2b. The water-retaining ring 221 separates the water-passing chamber 2c from the water-draining chamber 2b. Under the action of the water pressure in the balancing chamber 2a, the diaphragm assembly 21 abuts against or disengages from the water-blocking surface 2211 to achieve isolation or conduction between the water-passing chamber 2c and the water-draining chamber 2b.

[0056] Reference Figures 10 to 13 As shown, regarding the water outlet box body 4: The water outlet box body 4 is formed with a first chamber 4a and a second chamber 4b arranged separately. The water outlet box body 4 also includes a water outlet box one-way valve 41, which is used to ensure that water can flow only from the first chamber 4a to the second chamber 4b.

[0057] The water outlet box body 4 has a siphon 4c, which is connected to the first chamber 4a and is used to break the siphon effect after flushing to prevent backflow.

[0058] The water outlet body 4 also has a second water outlet 4e, a main water inlet 4f, and a secondary water inlet 4g. The second water outlet 4e and the main water inlet 4f are respectively connected to the second chamber 4b. The main water inlet 4f is used to connect with the first water outlet 224 of the flushing valve body 2, thereby introducing the high-pressure water stored in the pressure vessel 24 into the second chamber 4b. The second water outlet 4e is used to discharge the water in the second chamber 4b to the flushing pipe. One end of the secondary water inlet 4g is connected to the second chamber 4b, and the other end of the secondary water inlet 4g is connected to the water outlet path 31b of the switch valve body 3. This allows a large flow of water from the outlet end of the electromagnetic body to directly enter the second chamber 4b through the secondary water inlet 4g and be discharged through the second water outlet 4e.

[0059] The water outlet box body 4 also forms a pressure relief port 4d. One end of the pressure relief port 4d is connected to the first chamber 4a. The pressure relief port 4d is connected to the back pressure chamber 31d of the solenoid valve body 34 through a third pipe 5c. A manual control valve 35 is provided in the third pipe 5c. When the manual control valve 35 is opened, the water in the back pressure chamber 31d is discharged to the first chamber 4a through the manual control valve 35, so that the first diaphragm group 32 connects the water inlet flow path 31a and the water outlet flow path 31b. In use, when the manual control valve 35 is opened, the water in the back pressure chamber 31d is discharged through the manual control valve 35, and then enters the pressure relief port 4d through the third pipe 5c. Then it flows through the first chamber 4a to the second chamber 4b. Because the space capacity of the back pressure chamber 31d is small, when the pressure flushing system is controlled by the manual control valve 35, the pressure relief water entering the first chamber 4a is usually only a small amount, usually less than 50ml. This completely avoids the problem of overflow from the siphon port 4c under high flow conditions, and at the same time, it does not occupy the water outlet channel of the second water outlet port 4e, ensuring the water flow to the toilet brush ring.

[0060] The water outlet box body 4 includes a first partition 42, a separator 43, and a second partition 44. The separator 43 is integrally formed with a pressure relief port 4d and a secondary water inlet port 4g. The second partition 44 is integrally formed with a second water outlet port 4e and a main water inlet port 4f. There are two second water outlet ports 4e, located on both sides of the main water inlet port 4f. The two second water outlet ports 4e can be connected to the main flushing water circuit and the washbasin water circuit of the toilet, respectively, to achieve dual water supply. The first partition 42 and the separator 43 close to form a first chamber 4a, and the second partition 44 and the separator 43 close to form a second chamber 4b. Through the layered arrangement of the three partitions, the two chambers are separated, resulting in a compact structure that is easy to manufacture and assemble.

[0061] Furthermore, the partition 43 forms a water passage hole 432 and a water-blocking protrusion 433 surrounding the water passage hole 432. The first partition 42 is provided with an insert plate portion 421 embedded in the water-blocking protrusion 433. The water-blocking protrusion 433 and the insert plate portion 421 are inserted and cooperate to block the water flow from the secondary water inlet 4g outside the first chamber 4a. Through the cooperation structure of the water-blocking protrusion 433 and the insert plate portion 421, the large flow of water flowing from the secondary water inlet 4g is blocked outside the first chamber 4a, so that the large flow of water directly enters the second chamber 4b through the water hole 432 and is discharged from the second water outlet 4e.

[0062] The separator 43 is provided with a guide surface 431 that converges towards the one-way valve 41 of the water outlet box. The guide surface 431 allows the water flow from the first chamber 4a to converge at the upper end of the one-way valve 41 of the water outlet box. The guide surface 431 is preferably an inclined surface or an arc-shaped surface, with its lowest point located near the upper end of the one-way valve 41 of the water outlet box. This effectively guides the pressure-relief water entering the first chamber 4a to the one-way valve 41 of the water outlet box, ensuring that the pressure-relief water can flow into the second chamber 4b in a timely and smooth manner through the one-way valve 41 of the water outlet box, and preventing the pressure-relief water from accumulating in the first chamber 4a.

[0063] Reference Figures 13 to 17 As shown, regarding the switch valve body 3; The switching valve body 3 includes a switching valve assembly 31, which forms an inlet flow path 31a, an outlet flow path 31b, a back pressure chamber 31d, a pressure relief buffer flow path 31c, and a transition chamber 31e. The inlet flow path 31a is connected to the pressure relief buffer flow path 31c, and the transition chamber 31e is connected to the back pressure chamber 31d. The first diaphragm group 32 has a first through hole 321 for normally opening the water inlet flow path 31a and the back pressure chamber 31d, and the first diaphragm group 32 can isolate or connect the water inlet flow path 31a and the water outlet flow path 31b. The second diaphragm assembly 33 includes a second elastic element 333. The second elastic element 333 is configured to deform when the water pressure in the pressure relief buffer flow path 31c is greater than the pressure of the second elastic element 333, so that the second diaphragm assembly 33 connects the pressure relief buffer flow path 31c with the water outlet flow path 31b, and simultaneously connects the back pressure chamber 31d with the water outlet flow path 31b. The solenoid valve body 34 is used to isolate or connect the transition chamber 31e and the water outlet flow path 31b; When the dual pressure relief solenoid valve assembly is discharging water, the solenoid valve body 34 connects the transition chamber 31e and the water outlet path 31b. The water flow in the back pressure chamber 31d is depressurized sequentially through the transition chamber 31e and the water outlet path 31b, so that the first diaphragm group 32 is in the position of connecting the inlet path 31a and the outlet path 31b.

[0064] The switching valve interface 11e of the aforementioned pressure stabilizing valve body assembly 11 is connected to the water inlet flow path 31a of the switching valve body 3.

[0065] The second diaphragm assembly 33 enables on / off control between the pressure relief buffer flow path 31c and the outlet flow path 31b, eliminating the need for an external independent pressure relief valve or external pressure relief pipeline. This reduces external pipeline connection points and leakage risks, resulting in a streamlined and reliable overall structure that is particularly suitable for installation in space-constrained equipment.

[0066] Specifically, the switching valve body 3 includes a switching valve assembly 31, a first diaphragm assembly 32, a second diaphragm assembly 21, and a solenoid valve body 34; The switch valve assembly 31 includes a switch valve body 311 and a switch valve cover 312. The switch valve body 311 and the switch valve cover 312 are fixedly connected by bolts and are sealed together. The switch valve assembly 31 also includes a water outlet 313, which is detachably installed at the water outlet end of the switch valve body 311 by bolts. The water outlet 313 is coaxially connected to the water outlet flow path 31b inside the switch valve body 311. The water outlet 313 has a flow guiding cavity inside, which can rectify the outflowing water flow, reduce water splashing and pressure loss. At the same time, the outer end of the water outlet 313 is provided with a standard docking interface, which can be quickly matched with water pipes, water terminals and other peripherals.

[0067] The switching valve assembly 31 includes a switching valve body 311 and a switching valve cover 312. The switching valve body 311 forms the inlet flow path 31a, the outlet flow path 31b, and the pressure relief buffer flow path 31c. The switching valve cover 312 forms the transition cavity 31e, the second through hole 31f, and the fourth through hole 31h. The first diaphragm assembly 32 is sandwiched between the switching valve body 311 and the switching valve cover 312. The closed space between the first diaphragm assembly 32 and the switching valve cover 312 constitutes the back pressure cavity 31d and surrounds the third through hole 31g.

[0068] The switching valve assembly 31 also has a second through hole 31f, a third through hole 31g, and a fourth through hole 31h. The second through hole 31f connects the transition chamber 31e and the water outlet path 31b. The solenoid valve body 34 is used to block or open the opening end of the second through hole 31f. The third through hole 31g connects the back pressure chamber 31d and the water outlet path 31b. The second diaphragm assembly 33 is used to block or open the opening end of the third through hole 31g. The fourth through hole 31h is used to connect the transition chamber 31e and the back pressure chamber 31d, so that the transition chamber 31e and the back pressure chamber 31d are in a normally open state.

[0069] The switch valve body 311 forms an inlet flow path 31a, an outlet flow path 31b, and a pressure relief buffer flow path 31c. More specifically, the bottom of the switch valve body 311 extends upward to form an annular water-blocking portion 3113. The water-blocking portion 3113 has a circular boss structure, with its lower end integrally connected to the bottom of the switch valve body 311, and its upper end surface is a flat annular plane. The outer space of the water-blocking portion 3113 forms an annular cavity 31i, and the inner space of the water-blocking portion 3113 forms the inlet of the outlet flow path 31b. The annular cavity 31i is arranged around the water-blocking portion 3113, that is, the annular cavity 31i is an annular channel located on the outer periphery of the water-blocking portion 3113. The outlet end of the water inlet flow path 31a is connected to the annular cavity 31i, and the inlet end of the pressure relief buffer flow path 31c is also connected to the annular cavity 31i, so that the water inlet flow path 31a and the pressure relief buffer flow path 31c are kept in a normally open state.

[0070] The upper end face of the water-blocking part 3113 forms a first water-stopping surface 3111. The first diaphragm group 32 is sandwiched between the switch valve body 311 and the switch valve cover 312, and is located above the water-blocking part 3113. The first diaphragm assembly 32 can deform up and down under the water pressure of the back pressure chamber 31d: when the first diaphragm assembly 32 abuts downward against the first water-stopping surface 3111 of the water-blocking part 3113, it cuts off the connection between the annular cavity 31i and the inlet of the water outlet path 31b, thereby cutting off the water inlet path 31a and the water outlet path 31b; when the first diaphragm assembly 32 deforms upward and separates from the first water-stopping surface 3111, the annular cavity 31i and the inlet of the water outlet path 31b are connected, and the water in the water inlet path 31a enters the inlet of the water outlet path 31b through the annular cavity 31i and over the upper end face of the water-blocking part 3113, thus realizing the connection between the water inlet path 31a and the water outlet path 31b.

[0071] After the first diaphragm assembly 32 is sandwiched between the switch valve body 311 and the switch valve cover 312, the first diaphragm assembly 32 and the switch valve cover 312 close to form a back pressure chamber 31d. The first diaphragm assembly 32 has a first through hole 321, which keeps the water inlet flow path 31a (specifically the annular cavity 31i) and the back pressure chamber 31d open, so that water in the water inlet flow path 31a can enter the back pressure chamber 31d through the first through hole 321. When the solenoid valve body 34 connects the back pressure chamber 31d and the outlet water flow path 31b, the water in the back pressure chamber 31d is discharged through the outlet water flow path 31b, the pressure in the back pressure chamber 31d decreases, and the water pressure in the inlet water flow path 31a pushes the first diaphragm assembly 32 to deform upward and remain detached from the first water stop surface 3111. The inlet water flow path 31a and the outlet water flow path 31b remain connected. When the solenoid valve body 34 disconnects the back pressure chamber 31d and the outlet water flow path 31b and the manual control valve 35 is closed, the water pressure in the back pressure chamber 31d is balanced with the water pressure in the inlet water flow path 31a. The first diaphragm assembly 32 is reset under the action of the water pressure in the back pressure chamber 31d and abuts against the first water stop surface 3111, disconnecting the inlet water flow path 31a and the outlet water flow path 31b.

[0072] In this invention, the annular cavity 31i allows the inlet flow path 31a to simultaneously supply water to the outlet flow path 31b and the pressure relief buffer flow path 31c without the need for a separate branch channel, simplifying the flow channel layout inside the switch valve body 311 and reducing manufacturing difficulty. Simultaneously, the water-blocking part 3113 is integrally formed at the bottom of the switch valve body 311, resulting in a stable structure and reliable sealing.

[0073] Specifically, the first diaphragm assembly 32 includes a first diaphragm 322 and a first support 323. The first diaphragm 322 is made of flexible rubber or silicone, and the first support 323 is made of rigid plastic. The first diaphragm 322 is fastened to the first support 323. A first through hole 321 passes through the first diaphragm 322 and the first support 323. When the first diaphragm 322 is in contact with the first water-stopping surface 3111, it can completely block the inlet flow path 31a and the outlet flow path 31b. As an extension, a spring can be installed inside the back pressure cavity 31d at the back end of the first support 323 to keep the first diaphragm 322 in contact with the first water-stopping surface 3111.

[0074] The back pressure chamber 31d provides dedicated space for the deformation and movement of the first diaphragm assembly 32, eliminating the need for a separate diaphragm chamber. Simultaneously, a manual control valve 35 is externally connected to the back pressure chamber 31d. When the manual control valve 35 is opened, water flows out of the back pressure chamber 31d through the valve, connecting the first diaphragm assembly 32 to the inlet flow path 31a and the outlet flow path 31b. By opening and closing the manual control valve 35, the internal pressure of the back pressure chamber 31d can be changed. The pressure difference across the first diaphragm assembly 32 enables manually controllable water flow. Users can control the water flow via the manual control valve 35 when the solenoid valve fails, preventing the toilet from being unable to flush during power outages.

[0075] The second diaphragm assembly 33 is assembled between the switch valve body 311 and the water outlet 313. The second diaphragm assembly 33 includes a second diaphragm 331, a second support 332, and a second elastic element 333. Preferably, the second diaphragm 331 is made of flexible rubber or silicone, the second support 332 is made of rigid plastic, and the second elastic element 333 is a compression spring. The second diaphragm and the second elastic element 333 are respectively fastened and fixed to both axial ends of the second support 332. Several axial water passage grooves 3321 are evenly opened on the outer periphery of the second support 332 to ensure smooth flow of pressure-relieved water.

[0076] The switch valve body 311 has a side end face. The third through hole 31g and the pressure relief buffer flow path 31c are both transversely extended to the side end face. The side end face constitutes the second water-stopping surface 3112. The second diaphragm group 33 abuts against the first water-stopping surface 3111 to isolate the pressure relief buffer flow path 31c from the water outlet flow path 31b, and at the same time isolates the back pressure chamber 31d from the water outlet flow path 31b. Under normal conditions, the second elastic element 333 provides a preset tightening force, so that the second diaphragm 331 is tightly attached to the second water-stopping surface 3112 to isolate the pressure relief buffer flow path 31c from the water outlet flow path 31b, and at the same time isolates the back pressure chamber 31d from the water outlet flow path 31b.

[0077] The switch valve cover 312 has a transition cavity 31e, a second through hole 31f, and a fourth through hole 31h. The solenoid valve body 34 is at least partially disposed in the transition cavity 31e. The telescopic end 341 of the solenoid valve body 34 is used to block or open the second through hole 31f. Through this structure, the second through hole 31f is designed as a small-diameter through hole, and the telescopic end 341 of the solenoid valve body 34 is used to block or open the second through hole 31f. Because the diameter of the second through hole 31f is small, the water pressure that the telescopic end 341 of the solenoid valve body 34 needs to overcome when blocking the second through hole 31f is smaller, thus allowing the use of a low-power solenoid valve in the solenoid valve body 34, reducing energy consumption and heat generation.

[0078] Reference Figure 18 and Figure 19 As shown, in the pressure flushing system, the components are connected via the following pipes: First pipe 5a: connects the first water outlet 224 of the flushing valve body 2 to the main water inlet 4f of the water outlet box body 4, and is used to transport the gas-liquid mixture stored in the pressure vessel 24 to the second chamber 4b of the water outlet box.

[0079] Second pipe 5b: connects the balance chamber interface 11d of the pressure stabilizing valve body assembly 11 to the differential pressure balance interface 231 of the flushing valve body 2, and is used to control the pressure relief and pressure maintenance water replenishment of the balance chamber 2a.

[0080] The third pipe 5c connects the back pressure chamber 31d of the switch valve body 3 and the pressure relief port 4d of the water outlet box body 4. The third pipe 5c is equipped with a manual control valve 35 for manual pressure relief control.

[0081] The fourth pipeline connects the outlet flow path 31b of the switch valve body 3 and the secondary inlet port 4g of the outlet box body 4. It is used to transport the flushing water flowing out after the switch valve body 3 is opened to the second chamber 4b of the outlet box body 4 and discharge it through the second outlet port 4e to perform the brush ring flushing function.

[0082] Fifth pipe 5e: connects the flushing valve interface 11c of the pressure stabilizing valve body 11 to the first water inlet interface 223 of the flushing valve body 2, and is used to transport the gas-liquid mixture after pressure stabilization and Venturi aspiration to the water passage chamber 2c and pressure vessel 24 of the flushing valve body 2.

[0083] In addition, the water source interface 11b of the pressure stabilizing valve body assembly 11 is directly connected to the municipal water source; the switch valve interface 11e of the pressure stabilizing valve body assembly 11 is directly connected to the water inlet flow path 31a of the switch valve body 3; the pressure interface 222 of the flushing valve body 2 is directly connected to the pressure vessel 24; the second water outlet interface 4e of the water outlet box body 4 is used to connect to the toilet flushing pipe, and its pressure relief interface 4d is used to break the siphon.

[0084] The working process of the pressure flushing system of this invention: 1. During the standby water replenishment phase, refer to... Figure 2 , Figure 4 , Figure 9 and Figure 19 As indicated by the blue arrow: At this stage, the solenoid valve body 34 is in a de-energized and closed state, its telescopic end 341 blocks the second through hole 31f, and the manual control valve 35 is also in a closed state.

[0085] Municipal water enters the water flow channel 11a through the water source interface 11b of the pressure stabilizing valve assembly 11. Initially, the valve stem 122 is held offset from the sealing gasket 123 by the elastic force of the first elastic element 121, and the water flow channel 11a is open. After passing through the third check valve 18, the municipal water flow splits into two paths: After passing through the opening and closing assembly 12, the water flows sequentially through the first one-way valve 13 and the first Venturi valve 14. When the water flows through the constriction section of the first Venturi valve 14, according to the Venturi effect, the water flow velocity increases and the pressure decreases at the constriction section. External air is introduced through the air inlet 11f on the pressure stabilizing valve body assembly 11, and mixes with the water to form a gas-liquid mixture. This gas-liquid mixture flows out of the pressure stabilizing valve body assembly 11 through the flushing valve interface 11c, enters the first water inlet 223 of the flushing valve body 2 through the fifth pipe 5e, and then flows into the water passage chamber 2c. Since the flushing valve body 2 is in the closed state at this time (diaphragm assembly 21 abuts against the water-proof surface 2211, separating the water passage chamber 2c from the drain chamber 2b), the gas-liquid mixture in the water passage chamber 2c enters the external pressure vessel 24 through the pressure interface 222 for storage. As the gas-liquid mixture continues to accumulate in the pressure vessel 24, the pressure in the pressure vessel 24 gradually increases. When the pressure inside pressure vessel 24 rises to the same level as the inlet pressure of the municipal water source, the water flow from the water source can no longer overcome the reverse pressure inside pressure vessel 24 and enter. At this point, the system reaches a dynamic equilibrium state—that is, the pressure inside pressure vessel 24 no longer rises, and the water flow basically stops flowing into pressure vessel 24. However, the system still maintains standby pressure and is ready to perform flushing action at any time.

[0086] II. Electrically controlled water outlet stage (solenoid valve energized and opened) Refer to Figure 3 , Figure 8 , Figure 9 , Figure 11 , Figure 12 , Figure 15 , Figure 18 and Figure 19 As indicated by the red arrow in the middle: When the toilet needs to be flushed, the control system sends an energizing signal to the solenoid valve body 34. The telescopic end 341 of the solenoid valve body 34 retracts under the drive of electromagnetic force, and the second through hole 31f opens.

[0087] At this time, the pressure relief channel of the back pressure chamber 31d is opened, and the water flow from the inlet flow path 31a flows sequentially through the first through hole 321 (entering the back pressure chamber 31d), the fourth through hole 31h (entering the transition chamber 31e), and the second through hole 31f (opened by the solenoid valve) into the outlet flow path 31b for discharge, causing the pressure in the back pressure chamber 31d to drop rapidly. Since the first through hole 321 keeps the inlet flow path 31a and the back pressure chamber 31d constantly connected, after the pressure in the back pressure chamber 31d is relieved, the water pressure in the inlet flow path 31a is greater than the water pressure in the back pressure chamber 31d, pushing the first diaphragm assembly 32 to deform upward and remain detached from the first water stop surface 3111, thus connecting the inlet flow path 31a and the outlet flow path 31b. At the same time, a small portion of the water in the inlet flow path 31a continuously enters the back pressure chamber 31d through the first through hole 321, and then flows into the outlet flow path 31b through the fourth through hole 31h, the transition chamber 31e, and the second through hole 31f in sequence, completing the continuous depressurization of the back pressure chamber 31d and ensuring that the first diaphragm assembly 32 remains in the conductive position.

[0088] After the switching valve body 3 is turned on, its specific working path is as follows: First path (control and pressure relief path): Water from the inlet flow path 31a enters the back pressure chamber 31d through the first through hole 321. Water in the back pressure chamber 31d enters the transition chamber 31e through the fourth through hole 31h, and then flows into the outlet flow path 31b through the second through hole 31f for discharge. Since the back pressure chamber 31d is connected to the outlet flow path 31b, the pressure in the back pressure chamber 31d remains low, and the first diaphragm assembly 32 continuously detaches from the first water-stopping surface 3111.

[0089] The second path (main water supply path): Water from the inlet path 31a flows through the annular cavity 31i outside the baffle 3113, passes over the upper surface of the baffle 3113, and enters the inlet of the outlet path 31b. It then flows out of the switch valve body 3 via the outlet path 31b. The water from the outlet path 31b flows through the fourth pipe 5d into the secondary inlet port 4g of the outlet box body 4, directly into the second chamber 4b of the outlet box body 4, and finally exits through the second outlet port 4e to the toilet flushing pipe to perform the brush ring flushing function. During this process, the water flow does not pass through the first chamber 4a of the outlet box body 4, but instead is directly introduced into the second chamber 4b via the secondary inlet port 4g before being discharged. The advantages of this path design are: since the main water flow for flushing completely avoids the first chamber 4a, it effectively avoids the risk of water backflow into the first chamber 4a and overflowing from the siphon port 4c under high flow conditions, ensuring the reliability of the siphon damage function, and also ensuring that the water flow to the toilet brush ring is sufficient and stable, without being affected by diversion.

[0090] Simultaneously, due to the opening of the switch valve body 3, the switch valve interface 11e of the pressure regulating valve body assembly 11 is connected to the outlet flow path 31b through the inlet flow path 31a, thereby creating a stronger negative pressure suction effect at the balance chamber interface 11d through the negative pressure action of the second Venturi valve 15. The water in the balance chamber 2a is discharged to the outlet box body 4 through the pressure difference balance interface 231, the second pipe 5b, the balance chamber interface 11d, the diameter reduction section of the second Venturi valve 15, the switch valve interface 11e, the inlet flow path 31a of the switch valve body 3, the outlet flow path 31b, and the fourth pipe 5d. The balance chamber 2a is rapidly depressurized, and the water pressure in the chamber drops sharply. Under the action of the inlet water pressure in the water passage chamber 2c, the diaphragm assembly 21 moves downward and quickly separates from the water-proof surface 2211 (fast response speed). The water passage chamber 2c is connected to the drain chamber 2b.

[0091] After the water passage chamber 2c and the drain chamber 2b are connected, the high-pressure gas-liquid mixture stored in the pressure vessel 24 enters the water passage chamber 2c through the pressure port 222, bypasses the water baffle ring 221 and flows into the drain chamber 2b. Finally, it flows out of the flushing valve body 2 through the first outlet port 224, enters the main inlet port 4f of the outlet box body 4 through the first pipe 5a, enters the second chamber 4b, merges with the flushing water from the outlet flow path 31b of the switch valve body 3, and is finally discharged through the second outlet port 4e, performing a large-flow main flushing action. At this point, the pressure flushing system completes a complete flushing and water discharge process.

[0092] During this water discharge process, as the first Venturi valve 14 continues to work, the air inlet 11f continuously draws in external air, and the water flow always maintains a gas-liquid mixed state, which effectively enhances the turbulence effect and scouring force of the flushing water flow, and at the same time removes the sediment and impurities deposited in the pipeline.

[0093] III. Normal shutdown and reset phase, refer to... Figure 3 As indicated by the medium-dark green arrow: When the flushing action is completed and the system needs to be shut down, the control system cuts off the power supply to the solenoid valve body 34, the telescopic end 341 of the solenoid valve body 34 re-seals the second through hole 31f, and the pressure relief channel of the back pressure chamber 31d is isolated.

[0094] At this point, the back pressure chamber 31d can no longer release pressure through the second through hole 31f. Water in the inlet flow path 31a continues to enter the back pressure chamber 31d through the first through hole 321. The water pressure in the back pressure chamber 31d gradually increases until it reaches equilibrium with the water pressure in the inlet flow path 31a. Under the action of the water pressure in the back pressure chamber 31d, the first diaphragm assembly 32 resets downward and tightly abuts against the first water-stopping surface 3111 of the water-blocking part 3113, cutting off the connection between the annular cavity 31i and the inlet of the outlet flow path 31b. The inlet flow path 31a and the outlet flow path 31b are disconnected again, and the switch valve body 3 closes.

[0095] After the switch valve body 3 is closed, the connection between the switch valve interface 11e of the pressure stabilizing valve body assembly 11 and the outlet flow path 31b is cut off, and the negative pressure suction effect at the balance chamber interface 11d disappears. At this time, the balance chamber 2a of the flushing valve body 2 remains connected to the water flow channel 11a through the differential pressure balance interface 231, the second pipe 5b, and the balance chamber interface 11d. The external water source continuously replenishes water to the balance chamber 2a through the water source interface 11b of the pressure stabilizing valve body assembly 11, the opening and closing assembly 12, and the second venturi valve 15, and the water pressure in the balance chamber 2a gradually increases. At the same time, since the switch valve body 3 is closed, the water in the pressure vessel 24 is no longer discharged through the flushing valve body 2, and the water pressure in the water passage chamber 2c gradually increases, working together with the water pressure in the balance chamber 2a.

[0096] Under the pressure of the water in the balancing chamber 2a, the diaphragm assembly 21 moves upward and re-abuts the water-blocking surface 2211, re-isolating the water passage chamber 2c from the drain chamber 2b, and closing the flushing valve body 2. During the closing process, the gradually increasing diameter annular gap formed between the flared section 162 of the one-way seal 16 and the second Venturi valve 15 throttles and limits the backflow of water at the balancing chamber interface 11d, effectively controlling the water pressure recovery speed in the balancing chamber 2a. The diaphragm assembly 21 smoothly resets, avoiding the water hammer effect caused by instantaneous rapid valve closure.

[0097] After the flushing valve body 2 is closed, the gas-liquid mixture in the pressure vessel 24 stops being output, and the system returns to the standby water replenishment state, waiting for the next flushing command.

[0098] IV. Manual pressure relief and water discharge stage (manual control valve 35 is opened), refer to Figure 11 , Figure 17 , Figure 18 and Figure 19 As indicated by the light green arrow: When the solenoid valve body 34 is damaged or the system power failure causes the electronic water discharge function to fail, the user can manually control the valve 35 to manually discharge water.

[0099] The user manually opens the manual control valve 35 located on the third pipe 5c. Water in the back pressure chamber 31d of the valve body 3 flows through the third pipe 5c to release pressure, and the pressure in the back pressure chamber 31d drops rapidly. Since the first through hole 321 keeps the inlet flow path 31a and the back pressure chamber 31d constantly connected, after the back pressure chamber 31d is depressurized, the pressure at the back end of the first diaphragm assembly 32 decreases. The water pressure in the inlet flow path 31a pushes the first diaphragm assembly 32 upward and separates it from the first water stop surface 3111, thus connecting the inlet flow path 31a and the outlet flow path 31b.

[0100] Water flowing out of outlet path 31b enters the secondary inlet port 4g of the outlet box body 4 through the fourth pipe 5d, enters the second chamber 4b, then enters the first chamber 4a through the one-way valve 41 of the outlet box, and finally is discharged to the toilet flushing pipe through the second outlet port 4e to perform the flushing action. During manual pressure relief water discharge, due to the limited pressure relief flow of the manual control valve 35, the pressure relief in the back pressure chamber 31d is relatively gentle, the opening degree of the first diaphragm group 32 is controllable, and the manual water discharge flow is relatively small.

[0101] When the user closes the manual control valve 35, the pressure relief channel of the back pressure chamber 31d is cut off. Water from the inlet flow path 31a continues to replenish water to the back pressure chamber 31d through the first through hole 321. The water pressure in the back pressure chamber 31d gradually increases until it is balanced with the water pressure of the inlet flow path 31a. The first diaphragm group 32 resets and re-abuts the first water stop surface 3111, cutting off the inlet flow path 31a and the outlet flow path 31b. The system returns to the standby water stop state.

[0102] It should be noted that during manual pressure relief and water discharge, due to the small space capacity of the back pressure chamber 31d, the pressure relief water entering the first chamber 4a is usually only a small amount (usually less than 50ml), which completely avoids the problem of overflow from the siphon port 4c under high flow conditions, and at the same time, it will not occupy the water outlet channel of the second water outlet 4e, ensuring the water flow to the toilet brush ring.

[0103] V. Abnormal overvoltage protection stage, refer to Figure 16 As indicated by the red arrow in the middle: When the system is in standby mode (the solenoid valve body 34 isolates the second through hole 31f, and the manual control valve 35 is closed), if the external water pressure rises abnormally or the pressure in the pressure vessel 24 is too high, the internal pressure of the system will continue to rise, and the water pressure in the inlet flow path 31a (equivalent to the water pressure in the pressure relief buffer flow path 31c) will rise accordingly.

[0104] When the water pressure exceeds the preset tightening force of the elastic element of the second diaphragm assembly 33, the water pressure acts on the back of the second diaphragm 331, pushing the second diaphragm 331 to overcome the elastic force of the elastic element and disengage from the second water-stopping surface 3112. The second diaphragm assembly 33 simultaneously opens two mechanical pressure relief channels: Firstly, the tail end opening of the pressure relief buffer flow path 31c is opened, and the pressure relief buffer flow path 31c is connected to the outlet flow path 31b. The high-pressure water flow from the inlet flow path 31a enters through the head opening of the pressure relief buffer flow path 31c, and after flowing through the pressure relief buffer flow path 31c, it flows from its tail end opening to the outlet flow path 31b, thus realizing the first pressure relief.

[0105] Secondly, the opening end of the third through hole 31g is opened, and the back pressure chamber 31d is connected to the water outlet flow path 31b. The water in the back pressure chamber 31d flows directly to the water outlet flow path 31b through the third through hole 31g, realizing the second pressure relief.

[0106] After the back pressure chamber 31d is directly connected to the outlet flow path 31b through the third through hole 31g and the pressure is quickly released, the pressure inside the back pressure chamber 31d drops sharply. Since the first through hole 321 keeps the inlet flow path 31a and the back pressure chamber 31d open, after the back pressure chamber 31d is released, the pressure at the back end of the first diaphragm assembly 32 decreases. The water pressure in the inlet flow path 31a pushes the first diaphragm assembly 32 upward and separates it from the first water stop surface 3111, thus connecting the inlet flow path 31a and the outlet flow path 31b.

[0107] At this point, the key operating mechanism is as follows: after the first diaphragm assembly 32 is fully opened, a smooth, high-flow-rate channel is formed between the inlet flow path 31a and the outlet flow path 31b. Water flows rapidly through the constriction section of the second Venturi valve 15 within the pressure-stabilizing valve body assembly 11 at a relatively high velocity. According to the Venturi effect, the faster the water flow velocity at the constriction section, the stronger the negative pressure generated. It is precisely because of the rapid pressure relief of the back pressure chamber 31d that the first diaphragm assembly 32 can open quickly and fully, ensuring that the water flowing through the second Venturi valve 15 has a sufficiently high velocity, thereby generating a sufficiently strong negative pressure suction at the balance chamber interface 11d.

[0108] The negative pressure acts on the balancing chamber 2a through the following path: negative pressure generated by the constriction section of the second Venturi valve 15 → balancing chamber interface 11d of the pressure stabilizing valve body assembly 11 → second pipe 5b → pressure differential balancing interface 231 of the flushing valve body 2 → balancing chamber 2a. Under the suction of this strong negative pressure, the water in the balancing chamber 2a is rapidly extracted and discharged through the above path: balancing chamber 2a → pressure differential balancing interface 231 → second pipe 5b → balancing chamber interface 11d of the pressure stabilizing valve body assembly 11 → constriction section of the second Venturi valve 15 → switching valve interface 11e → inlet flow path 31a of the switching valve body 3 → outlet flow path 31b of the switching valve body 3 → fourth pipe 5d → secondary inlet interface 4g of the outlet box body → second chamber 4b → second outlet interface 4e.

[0109] Therefore, the pressure relief of the back pressure chamber 31d is the driving force for the opening of the first diaphragm assembly 32, and the large flow rate and high speed of water generated after the opening of the first diaphragm assembly 32 is the prerequisite for the second venturi valve 15 to generate sufficient negative pressure. This negative pressure is the direct driving force for the rapid pressure relief of the balance chamber 2a. The three are interconnected: the faster the pressure relief of the back pressure chamber 31d, the faster and more fully the first diaphragm assembly 32 opens; the more fully the first diaphragm assembly 32 opens, the greater the flow velocity of the water flowing through the second venturi valve 15; the greater the flow velocity, the stronger the negative pressure generated by the second venturi valve 15; the stronger the negative pressure, the faster the pressure relief speed of the balance chamber 2a, forming a positive cycle acceleration effect.

[0110] After the balance chamber 2a is rapidly depressurized under the aforementioned strong negative pressure, the water pressure inside the chamber drops sharply. Under the action of the inlet water pressure in the water passage chamber 2c, the diaphragm assembly 21 moves downward and quickly detaches from the water-proof surface 2211, and the water passage chamber 2c becomes connected to the drain chamber 2b. At this time, the high-pressure gas-liquid mixture stored in the pressure vessel 24 enters the water passage chamber 2c through the pressure port 222, then flows out of the flush valve body 2 through the drain chamber 2b and the first outlet port 224, enters the main inlet port 4f of the outlet box body 4 through the first pipe 5a, enters the second chamber 4b, and is finally discharged through the second outlet port 4e, allowing the pressure vessel 24 to be rapidly depressurized to a safe range.

[0111] During the overpressure relief process, the water flow in the pressure relief buffer flow path 31c must overcome the preset tightening force of the second elastic element 333 to be conductive. The deformation process of the second elastic element 333 buffers the water pressure impact, preventing drastic pressure fluctuations from causing impact damage to various components. When the internal pressure of the system drops below the preset tightening force of the second elastic element 333, the second elastic element 333 resets and pushes the second diaphragm 331 to re-tightly adhere to the second water stop surface 3112, isolating the pressure relief buffer flow path 31c from the outlet flow path 31b and the back pressure chamber 31d from the outlet flow path 31b, thus closing the two mechanical pressure relief channels. The back pressure chamber 31d re-pressurizes through the first through hole 321, pushing the first diaphragm assembly 32 to reset and press against the first water stop surface 3111, and the switch valve body 3 returns to the closed state. After the switch valve body 3 is closed, the flow channel between the inlet flow path 31a and the outlet flow path 31b is cut off, the water flow through the second venturi valve 15 disappears, the negative pressure disappears, and the suction at the balance chamber interface 11d stops. The external water source continues to replenish water to the balance chamber 2a through the pressure stabilizing valve body assembly 11, the balance chamber 2a is pressurized again, the diaphragm assembly 21 resets to abut against the water-proof surface 2211, the flush valve body 2 also returns to the closed state, and the system returns to the standby water-stop state.

[0112] This linkage pressure relief mechanism realizes a complete chain reaction from pressure relief in the back pressure chamber 31d → opening of the first diaphragm group 32 → high-speed water flow to generate strong negative pressure in the Venturi → pressure relief in the balance chamber 2a → opening of the flushing valve body 2 → pressure relief in the pressure vessel 24. This ensures that the pressure vessel 24 will not burst or be damaged due to long-term overpressure, effectively guaranteeing the safety and service life of the system.

[0113] Example 3 On the other hand, the present invention provides a toilet, including a toilet seat and the aforementioned pressure flushing system. The pressure flushing system is installed inside or on the side of the toilet seat. The second water outlet 4e of the water outlet box body 4 of the pressure flushing system is connected to the flushing pipeline of the toilet seat. The flushing pipeline includes a brush ring water path and a main flush water path. The water source interface 11b of the pressure stabilizing valve body 11 is used to connect to an external municipal water source. The pressure flushing system controls the start and stop of flushing through the switch valve body 3 to provide a stabilizing, gas-liquid mixed flushing water flow to the toilet seat, thereby completing the brush ring flushing and main flushing of the toilet bowl.

[0114] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and 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 this invention.

[0115] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0116] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A pressure-stabilizing water inlet assembly (1), characterized in that, It includes a pressure regulating valve body assembly (11), which has a water flow channel (11a) inside. The water flow channel (11a) is provided with a water source interface (11b) and a flushing valve interface (11c) that communicate with the outside. An opening and closing assembly (12) is provided in the water flow channel (11a) and facing the water source interface (11b). The opening and closing assembly (12) includes a first elastic element (121), a valve stem (122) and a sealing gasket (123). The water pressure of the water flow entering from the water source interface (11b) acts on the valve stem (122), so that the valve stem (122) can move along its axial direction to abut against the sealing gasket (123). The first elastic element (121) is used to keep the valve stem (122) offset from the sealing gasket (123). The water flow channel (11a) is provided with a first one-way valve (13) and a first venturi valve (14) in sequence in the direction of the flushing valve interface (11c). The pressure stabilizing valve body assembly (11) is provided with an air inlet (11f) for communicating the water flow channel (11a) with the outside. The air inlet is arranged on the side of the radial section of the first venturi valve (14).

2. The pressure-stabilizing water inlet assembly (1) according to claim 1, characterized in that: The opening and closing assembly (12) further includes an adjusting cover (124), which is movably connected to the pressure regulating valve body assembly (11) along the axial direction of the valve stem (122). The first elastic element (121) is a spring, which is arranged between the adjusting cover (124) and the valve stem (122). The movement of the adjusting cover (124) relative to the pressure regulating valve body assembly (11) changes the compression of the spring.

3. The pressure-stabilizing water inlet assembly (1) according to claim 1, characterized in that: The water flow channel (11a) is also provided with a balance chamber interface (11d) and a switch valve interface (11e) that communicate with the outside. A second venturi valve (15) is provided in the water flow channel (11a) and in the direction of the switch valve interface (11e). The balance chamber interface (11d) is arranged on the side of the radial section of the second venturi valve (15).

4. The pressure-stabilizing water inlet assembly (1) according to claim 3, characterized in that: It also includes a one-way seal (16), which includes a sealing section (161) and a flared section (162). The sealing section (161) is sleeved on the outer periphery of the second Venturi valve (15) and seals against the inner wall of the water flow channel (11a). The flared section (162) extends toward the switch valve interface (11e). The inner side of the flared section (162) forms an annular gap with a gradually increasing diameter with the second Venturi valve (15). The balance chamber interface (11d) is arranged between the sealing section (161) and the flared section (162).

5. The pressure-stabilizing water inlet assembly (1) according to claim 4, characterized in that: The pressure regulating valve body assembly (11) has a recessed groove (1111) that extends along the direction of the flared section (162).

6. A pressure flushing system, characterized in that: It includes a flush valve body (2), a water outlet box body (4), a switch valve body (3), and a pressure-stabilizing water inlet assembly (1) as described in any one of claims 1 to 5. The flushing valve body (2) includes a water-proof surface (2211) and a diaphragm assembly (21). The diaphragm assembly (21) is used to divide the internal chamber of the flushing valve body (2) into a balance chamber (2a) and a drain chamber (2b). A water-passing chamber (2c) is also formed inside the flushing valve body (2). When water enters the balance chamber (2a), the diaphragm assembly (21) abuts against the water-proof surface (2211) to separate the water passage chamber (2c) and the drain chamber (2b). When the balance chamber (2a) is depressurized and drained, the diaphragm assembly (21) disengages from the water-proof surface (2211), and the water passage chamber (2c) and the drain chamber (2b) become connected. The flushing valve interface (11c) is connected to the water passage chamber (2c), the balance chamber interface (11d) is connected to the balance chamber (2a), the switch valve interface (11e) is connected to the switch valve body (3), and the switch valve body (3) controls the external water source to supply water to the water source interface (11b). The water passage chamber (2c) is connected to the water outlet box.

7. A pressure flushing system according to claim 6, characterized in that: The switch valve body (3) includes a switch valve assembly (31), which forms an inlet flow path (31a), an outlet flow path (31b), a back pressure chamber (31d), a pressure relief buffer flow path (31c), and a transition chamber (31e). The inlet flow path (31a) is connected to the pressure relief buffer flow path (31c), and the transition chamber (31e) is connected to the back pressure chamber (31d). The first diaphragm assembly (32) has a first through hole (321) for normally connecting the water inlet flow path (31a) and the back pressure chamber (31d), and the first diaphragm assembly (32) can isolate or connect the water inlet flow path (31a) and the water outlet flow path (31b). The second diaphragm assembly (33) includes a second elastic element (333), which is configured to deform when the water pressure in the pressure relief buffer flow path (31c) is greater than the pressure of the second elastic element (333), so that the second diaphragm assembly (33) connects the pressure relief buffer flow path (31c) and the water outlet flow path (31b), and simultaneously connects the back pressure chamber (31d) and the water outlet flow path (31b); The solenoid valve body (34) is used to isolate or connect the transition chamber (31e) and the water outlet path (31b). When the dual pressure relief solenoid valve assembly is discharging water, the solenoid valve body (34) connects the transition chamber (31e) and the water outlet path (31b), and the water flow in the back pressure chamber (31d) is depressurized sequentially through the transition chamber (31e) and the water outlet path (31b), so that the first diaphragm group (32) is in the position of connecting the water inlet path (31a) and the water outlet path (31b); The switch valve interface (11e) is connected to the water inlet flow path (31a).

8. The pressure flushing system according to claim 7, characterized in that: The water outlet box body (4) is formed with a first chamber (4a) and a second chamber (4b) arranged separately, and the water outlet box body (4) includes a water outlet box one-way valve (41), which is used to allow water to flow only from the first chamber (4a) to the second chamber (4b). The water outlet box body (4) has a siphon port (4c) and a pressure relief port (4d), and the siphon port (4c) is connected to the first chamber (4a); The water outlet box body (4) has a second water outlet (4e), a main water inlet (4f) and a secondary water inlet (4g). The second water outlet (4e) and the main water inlet (4f) are respectively connected to the second chamber (4b). The other end of the main water inlet (4f) is connected to the water passage chamber (2c) of the flushing valve body (2). One end of the secondary water inlet (4g) is connected to the second chamber (4b), and the other end of the secondary water inlet (4g) is connected to the water outlet path (31b) of the switch valve body (3).

9. A pressure flushing system according to claim 8, characterized in that: The water outlet box body (4) also forms a pressure relief port (4d). One end of the pressure relief port (4d) is connected to the first chamber (4a). The pressure relief port (4d) is connected to the back pressure chamber (31d) of the solenoid valve body (34) through a third pipe (5c). A manual control valve (35) is provided in the third pipe (5c). When the manual control valve (35) is opened, the water in the back pressure chamber (31d) is discharged to the first chamber (4a) through the manual control valve (35), so that the first diaphragm group (32) connects the water inlet flow path (31a) and the water outlet flow path (31b).

10. A toilet, characterized in that: Includes the pressure flushing system as described in any one of claims 6 to 9.

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