Pressure flushing system and closestool

Abstract

The invention discloses a pressure flushing system and a closestool. The pressure difference valve comprises a pressure difference valve body, a membrane is movably arranged in the pressure difference valve body, the interior of the pressure difference valve body is divided into a balance cavity and a water drainage cavity by the membrane, a water passing cavity is further formed in the pressure difference valve body, and the membrane is used for opening and closing an opening of the water drainage cavity; when water enters the balance cavity, the membrane moves towards the water drainage cavity to close the opening of the water drainage cavity, when the balance cavity relieves pressure, the membrane moves towards the balance cavity to open the opening of the water drainage cavity, and the water drainage cavity is communicated with the water passing cavity. A diaphragm in the differential pressure valve body cancels a traditional pressurizing hole structure, the diaphragm moves towards the water drainage cavity to close an opening of the water drainage cavity when water enters the balance cavity to be pressurized, on-off control of the water drainage cavity and the water passing cavity is achieved, fluid can complete pressure switching without passing through a small hole diameter, and the size of the opening is larger; and winding, accumulation and blockage of flocculent sticky materials are avoided from the source.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware flushing technology, and more particularly to a pressure flushing system and a toilet. Background Technology

[0002] With the widespread application of sanitary ware, pressure flushing systems have become widely used in toilets and other sanitary ware due to their advantages such as high flushing efficiency and low water consumption. Existing pressure flushing systems typically use a differential pressure valve as the core control component. The flushing pressure is established and released by adjusting the opening and closing of the differential pressure valve, thereby completing the flushing action of the toilet.

[0003] In existing technologies, differential pressure valves are mostly designed with a unidirectional flow pattern of "one inlet and one outlet." This means that a pressure boosting port and a pressure relief port are respectively opened on the valve body. Fluid enters the valve cavity through the pressure boosting port to build pressure, and then exits through the pressure relief port to complete the pressure relief process. To prevent fine sand or other solid particles in the fluid from clogging the pressure boosting port and affecting the normal operation of the differential pressure valve, existing solutions typically install an anti-clogging needle inside the pressure boosting port. The anti-clogging needle's structural characteristics prevent fine sand from entering the valve cavity, providing a basic anti-clogging function.

[0004] However, in real-world applications, toilet flushing fluids contain not only hard particles like fine sand but also potentially viscous substances like flocculent material. Existing differential pressure valves' anti-clogging needles can only block hard particles like fine sand; they are ineffective at intercepting viscous substances like flocculent material. These viscous substances easily become entangled on the needle or adhere to the wall of the pressure-boosting orifice. Over time, they accumulate and solidify, eventually clogging the orifice. Once the pressure-boosting orifice is clogged, the differential pressure valve cannot properly switch between pressurization and depressurization, leading to valve disc failure to reset and continuous water supply. This ultimately results in the pressure flushing system not stopping, causing significant water waste and potential bathroom flooding and equipment damage due to continuous overflow, severely impacting user experience and product reliability.

[0005] Therefore, in view of the defects in existing pressure flushing systems, there is an urgent need for a pressure flushing system and toilet that can effectively solve the problem of clogging by flocculent viscous substances and prevent the system from running water continuously, so as to make up for the shortcomings of existing technology. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a pressure flushing system and toilet, which can effectively solve the problems existing in the prior art.

[0007] The technical solution of this invention is: According to one aspect of the present invention, a differential pressure valve body is included, wherein a diaphragm is movably disposed within the differential pressure valve body, the diaphragm dividing the differential pressure valve body into a balance chamber and a drain chamber, and a water passage chamber is also formed within the differential pressure valve body; the diaphragm is used to open and close the opening of the drain chamber; when water enters the balance chamber, the diaphragm moves toward the drain chamber to close the opening of the drain chamber; when the balance chamber is depressurized, the diaphragm moves toward the balance chamber to open the opening of the drain chamber; the drain chamber is in communication with the water passage chamber. It also includes a multi-way pipe joint, a first inlet pipe, a second inlet pipe, a pressure vessel, an outlet pipe, and a siphon valve assembly; the multi-way pipe joint is provided with an inlet, one end of the first inlet pipe is connected to the multi-way pipe joint, and the other end is simultaneously connected to the water passage chamber of the pressure vessel and the differential pressure valve body; one end of the second inlet pipe is connected to the multi-way pipe joint, and the other end is connected to the balance chamber of the differential pressure valve body; one end of the outlet pipe is connected to the drain chamber, and the other end is equipped with a siphon valve assembly, which is provided with an outlet; one end of the multi-way pipe joint is assembled to the siphon valve assembly and connected to the outlet pipe, and a switch valve is installed between the multi-way pipe joint and the outlet pipe.

[0008] Furthermore, the multi-port pipe connector is a first venturi valve, and the air intake of the first venturi valve is connected to the balance chamber of the second water inlet pipe and the differential pressure valve body.

[0009] Furthermore, it also includes a connector, which is assembled between the outlet pipe and the differential pressure valve body. The specific structure of the connector includes: a second venturi valve and a connecting pipe. One end of the second venturi valve is connected to the first inlet pipe, and the other end is connected to the water passage chamber of the differential pressure valve body. One end of the connecting pipe is connected to the outlet pipe, and the other end is connected to the drain chamber of the differential pressure valve body.

[0010] Furthermore, one end of the connector is formed with an air intake port for a second Venturi valve, and one end of the air intake port is equipped with a second one-way valve.

[0011] Furthermore, a first check valve is installed between the second venturi valve and the first inlet pipe.

[0012] Furthermore, there are two pressure vessels, each equipped with a third pipeline, and the two third pipelines are respectively connected to the water passage chamber of the differential pressure valve body.

[0013] Furthermore, an elastic reset element is provided on the side of the diaphragm near the balance chamber. The elastic reset element is a compression spring, with one end of the compression spring abutting against the diaphragm and the other end abutting against the inner wall of the balance chamber.

[0014] Furthermore, the inlet end of the switching valve is equipped with a pressure relief valve.

[0015] Furthermore, a filter screen is installed at the end of the first water inlet pipe near the water inlet.

[0016] According to another aspect of the invention, a toilet includes a pressure flushing system as described in any of the above.

[0017] By adopting the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows: Firstly, the diaphragm inside the differential pressure valve eliminates the traditional pressure boosting orifice structure. When water is pressurized in the balance chamber, it moves towards the drain chamber and closes its opening, thus controlling the flow between the drain chamber and the through chamber. The fluid does not need to pass through a small orifice to complete pressure switching, and the larger opening size fundamentally avoids the entanglement and blockage of flocculent viscous substances. At the same time, the cooperation of the first inlet pipe, the second inlet pipe, the multi-way pipe joint, and the pressure vessel realizes the diversion and pressure storage of water flow and the precise pressurization of the balance chamber. The connection between the outlet pipe and the siphon valve assembly ensures efficient release of flushing pressure, and the on / off valve enables flexible control of the flushing process. The overall structure not only solves the problem of the system not stopping water flow, but also retains the high flushing efficiency of the pressure flushing system, improving product reliability and user experience.

[0018] Secondly, the multi-port pipe joint is set as the first venturi valve, and its air intake is connected to the balance chamber of the second water inlet pipe and the differential pressure valve body. By utilizing the throat throttling effect of the first venturi valve, a stable negative pressure is generated when water flows through. The negative pressure causes the liquid in the balance chamber to flow out quickly through the second water inlet pipe, which causes the diaphragm to quickly open the drain chamber, greatly improving the opening efficiency of the system.

[0019] Thirdly, by adding a connector including a second venturi valve and a connecting pipe, the connection structure between the outlet pipe and the differential pressure valve body is optimized. The second venturi valve enables efficient communication between the first inlet pipe and the water passage chamber of the differential pressure valve body, while the connecting pipe ensures stable connection between the outlet pipe and the drain chamber. This makes the flow path of fluid between the components more reasonable, effectively improving the stability and transmission efficiency of the flushing pressure. At the same time, the integrated design of the connector facilitates assembly and subsequent maintenance, reduces the sealing risks of pipe connections, and, together with the anti-clogging design of the overall system, further enhances the structural reliability and durability of the pressure flushing system.

[0020] Fourth, a second check valve is installed at the intake port of the second venturi valve of the connector, which can effectively prevent fluid from flowing back from the intake port, ensure that the negative pressure generated by the second venturi valve during operation is always stable and directed to the outside for air intake, avoid the imbalance of gas-liquid mixing ratio caused by backflow, and ensure the pressure storage effect of gas-liquid mixture in the pressure vessel.

[0021] Fifth, a first check valve is installed between the second venturi valve and the first water inlet pipe to prevent the high-pressure gas-liquid mixture in the pressure vessel from flowing back to the first water inlet pipe, ensuring that the pressure in the pressure vessel is stably locked and preventing pressure storage failure.

[0022] Sixth, a filter screen is installed at one end of the first water inlet pipe near the water inlet. This can block hard particles before the water flows into the pressure vessel and prevent clogging by flocculent viscous substances. At the same time, the front-mounted design of the filter screen makes it easy for users to clean it regularly, reducing the frequency and cost of system maintenance.

[0023] Seventh, the system employs two pressure vessels connected to the water passage chamber of the differential pressure valve body via a third pipeline. This dual-pressure vessel design significantly increases the system's pressure storage capacity, enabling it to store more high-pressure gas-liquid mixtures. During flushing, it can release more sufficient and longer-lasting flushing pressure, effectively improving the flushing effect of toilets and other sanitary ware, especially enhancing its ability to flush away stubborn dirt. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a schematic cross-sectional view of the present invention. Figure 1 ; Figure 4 This is a schematic cross-sectional view of the present invention. Figure 2 ; Figure 5 This is an enlarged structural diagram of point A in this invention; Figure 6 This is a schematic cross-sectional view of the present invention. Figure 3 ; Figure 7 This is a schematic cross-sectional view of the present invention. Figure 4 ; Figure 8 This is a schematic diagram illustrating the principle of the present invention; In the diagram: Pressure vessel-1, Third pipeline-11, First venturi valve-2, Inlet-20, First inlet pipeline-3, Connector-4, Second venturi valve-41, First check valve-42, Air intake-43, Second check valve-44, Connecting pipe-45, Second inlet pipeline-5, Differential pressure valve body-6, Water passage chamber-60, Balance chamber-61, Drain chamber-62, Diaphragm-63, Elastic reset element-65, Outlet pipeline-7, Switch valve-8, Siphon valve assembly-9, Outlet-91, Jet connector-911, Brush ring connector-912, Pressure relief valve-10, Filter screen-12. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1 to 8 As shown, this solution provides a pressure flushing system and a toilet.

[0028] Please see Figures 1 to 8 The system includes a differential pressure valve body 6, within which a diaphragm 63 is movably disposed. The diaphragm 63 divides the differential pressure valve body 6 into a balance chamber 61 and a drain chamber 62. A water passage chamber 60 is also formed within the differential pressure valve body 6. An elastic reset member 65 is provided on the side of the diaphragm 63 near the balance chamber 61, and the diaphragm 63 is used to open and close the opening of the drain chamber 62. The elastic reset member 65 can assist the diaphragm 63 in sealing the opening of the drain chamber 62 when the water pressure is low. When water enters the balance chamber 61, the diaphragm 63 moves toward the drain chamber 62 to close the opening of the drain chamber 62. When the balance chamber 61 is depressurized, the diaphragm 63 moves toward the balance chamber 61 to open the opening of the drain chamber 62. The drain chamber 62 is connected to the water passage chamber 60. The elastic reset member 65 is a compression spring, with one end abutting against the diaphragm 63 and the other end abutting against the inner wall of the balance chamber 61.

[0029] It also includes a multi-way pipe connector, a first inlet pipe 3, a second inlet pipe 5, a pressure vessel 1, an outlet pipe 7, and a siphon valve assembly 9. The multi-way pipe connector has an inlet 20. One end of the first inlet pipe 3 is connected to the multi-way pipe connector, and the other end is simultaneously connected to the water passage chamber 60 of the pressure vessel 1 and the differential pressure valve body 6. One end of the second inlet pipe 5 is connected to the multi-way pipe connector, and the other end is connected to the balance chamber 61 of the differential pressure valve body 6. One end of the outlet pipe 7 is connected to the drain chamber 62, and the other end is equipped with the siphon valve assembly 9, which has an outlet 91. The outlet 91 includes a spray connector 911 and a brush ring connector 912. One end of the multi-way pipe connector is assembled to the siphon valve assembly 9 and connected to the outlet pipe 7, and a switch valve 8 is installed between the multi-way pipe connector and the outlet pipe 7. A pressure relief valve 10 is installed at the inlet end of the switch valve 8. The pressure relief valve 10 automatically opens when the system pressure exceeds the set pressure to protect the system from damage. The on / off valve 8 can be a mechanical valve, an electrically controlled valve, or a mechanically coupled electrically controlled valve. The on / off valve 8, the pressure relief valve 10, and the siphon valve assembly 9 are all direct applications of existing technology, and their principles will not be elaborated here.

[0030] Preferably, the multi-way pipe connector is a first Venturi valve 2, and the air intake of the first Venturi valve 2 is connected to the balance chamber 61 of the second water inlet pipe 5 and the differential pressure valve body 6. By setting the multi-way pipe connector as the first Venturi valve 2, and its air intake being connected to the balance chamber 61 of the differential pressure valve body 6 and the second water inlet pipe 5, the throat throttling effect of the first Venturi valve 2 is utilized to generate a stable negative pressure when water flows through. The negative pressure causes the liquid in the balance chamber 61 to flow out quickly through the second water inlet pipe 5, causing the diaphragm 63 to quickly open the drain chamber 62, which greatly improves the opening efficiency of the system.

[0031] Please see Figures 1 to 5It also includes a connector 4, which is assembled between the outlet pipe 7 and the differential pressure valve body 6. The connector 4 specifically includes a second venturi valve 41 and a connecting pipe 45. One end of the second venturi valve 41 is connected to the first inlet pipe 3, and the other end is connected to the water passage chamber 60 of the differential pressure valve body 6. One end of the connecting pipe 45 is connected to the outlet pipe 7, and the other end is connected to the drain chamber 62 of the differential pressure valve body 6. One end of the connector 4 has an air intake 43 for the second venturi valve 41, and a second check valve 44 is assembled at one end of the air intake 43. By adding a connector 4, which includes a second venturi valve 41 and a connecting pipe 45, the connection structure between the outlet pipe 7 and the differential pressure valve body 6 is optimized. The second venturi valve 41 enables efficient communication between the first inlet pipe 3 and the water passage 60 of the differential pressure valve body 6, while the connecting pipe 45 ensures stable connection between the outlet pipe 7 and the drain chamber 62. This makes the flow path of fluid between the components more reasonable, effectively improving the stability and transmission efficiency of the flushing pressure. At the same time, the integrated design of the connector 4 facilitates assembly and subsequent maintenance, reduces the sealing risks of pipe connections, and, together with the anti-clogging design of the overall system, further enhances the structural reliability and durability of the pressure flushing system.

[0032] A second check valve 44 is installed at the suction port 43 of the second venturi valve 41 of the connector 4. This can effectively prevent fluid from flowing back from the suction port 43, ensuring that the negative pressure generated by the second venturi valve 41 during operation always points to the outside for suction, avoiding the imbalance of gas-liquid mixing ratio due to backflow, and ensuring the pressure storage effect of the gas-liquid mixture in the pressure vessel 1.

[0033] A first check valve 42 is installed between the second venturi valve 41 and the first water inlet pipe 3. The first check valve 42 installed between the second venturi valve 41 and the first water inlet pipe 3 can prevent the high-pressure gas-liquid mixture in the pressure vessel 1 from flowing back to the first water inlet pipe 3, ensuring that the pressure in the pressure vessel 1 is stable and locked, and avoiding the failure of pressure storage.

[0034] Please see Figure 3 A filter screen 12 is installed at one end of the first water inlet pipe 3 near the water inlet 20. Installing a filter screen 12 at one end of the first water inlet pipe 3 near the water inlet 20 can block hard particles before the water flows into the pressure vessel 1 and avoid clogging by flocculent viscous substances; at the same time, the front-mounted design of the filter screen 12 makes it easy for users to clean it regularly, reducing the maintenance frequency and maintenance cost of the system.

[0035] Please see Figure 1 and Figure 2There are two pressure vessels 1, each equipped with a third pipe 11, which are connected to the water passage chamber 60 of the differential pressure valve body 6. The use of two pressure vessels 1 connected to the water passage chamber 60 of the differential pressure valve body 6 via third pipes 11 significantly increases the system's pressure storage capacity, allowing for the storage of more high-pressure gas-liquid mixture. This enables the release of more sufficient and longer-lasting flushing pressure during flushing, effectively improving the flushing effect of toilets and other sanitary ware, especially enhancing the flushing ability against stubborn dirt.

[0036] The working principles of the first Venturi valve 2 and the second Venturi valve 41 mentioned above are common knowledge well known to those skilled in the art, and their principles will not be elaborated here.

[0037] According to another aspect of the invention, a toilet includes a pressure flushing system as described in any of the above.

[0038] Working principle: Initial state, The switch valve 8 is in the closed state, and the elastic reset element 65 assists the diaphragm 63 to block the opening of the drain chamber 62 at this time; there is no high-pressure fluid in the two pressure vessels 1, and the system is in a low-pressure standby state ready to start; the first check valve 42 and the second check valve 44 are both in the closed anti-backflow state.

[0039] Phase 1: After the system is connected to a pressurized water source, water flows in from the inlet 20 of the first Venturi valve 2, and is divided into two independent flow paths to complete the pressure storage and pressurization of the balance chamber: First route: Gas-liquid mixing and pressure storage in a pressure vessel. Water flows through the first inlet pipe 3 to the second Venturi valve 41 inside the connector 4. Utilizing the throat throttling effect of the second Venturi valve 41, negative pressure is generated at its air intake 43, drawing in external air through the second one-way valve 44, forming a gas-liquid mixture with the water flow. This gas-liquid mixture passes through the water passage 60 of the differential pressure valve body 6 and is injected into the two pressure vessels 1. As the gas-liquid mixture is continuously injected, the pressure inside the pressure vessels 1 gradually increases until it reaches equilibrium with the water source pressure, completing the pressure storage process. At this point, the first one-way valve 42 remains closed due to the pressure difference, locking the high pressure inside the pressure vessels.

[0040] Second route: Pressure-pressurized valve closed in the balance chamber. Another stream of water flows through the second inlet pipe 5 and is injected into the balance chamber 61 of the differential pressure valve body 6. The pressure in the balance chamber 61 gradually becomes greater than the pressure of the drain chamber 62 and the through chamber 60, so that the diaphragm 63 keeps the opening of the drain chamber 62 sealed, the pressure vessel 1 remains in a high-pressure state, and the water inlet and pressure storage stage ends.

[0041] Second stage: When the flushing command is triggered, switch valve 8 is opened, and the system enters the flushing stage: After the switch valve 8 is opened, the pressurized water source flows through the connection channel between the first venturi valve 2 and the outlet pipe 7, passing through the first venturi valve 2. At this time, a strong negative pressure is generated at the suction port of the first venturi valve 2, and one end of it is connected to the balance chamber 61, quickly drawing out the liquid in the balance chamber 61 and realizing the instantaneous pressure relief of the balance chamber 61. After the pressure in the balance chamber 61 drops sharply, the diaphragm 63 moves towards the balance chamber 61, and the opening of the drain chamber 62 is fully opened. At this time, the water passage chamber 60 of the differential pressure valve body 6 and the drain chamber 62 are reconnected. After the drain chamber 62 is opened, the high-pressure gas-liquid mixture stored in the pressure vessel 1 flows rapidly into the water chamber 60 through the third pipeline 11, then enters the outlet pipeline 7 through the drain chamber 62, and finally flows to the siphon valve assembly 9. High-pressure fluid is divided into two paths through the outlet 91 of the siphon valve assembly 9: one path is ejected from the jet connector 911, forming a strong jet that drives the water in the toilet to generate a siphon effect and quickly discharge waste; the other path is ejected from the brush ring connector 912, forming a ring-shaped water flow to thoroughly clean the inner wall of the toilet. Phase 3: Cyclic Reset When the pressure inside pressure vessel 1 drops to balance with the water source pressure, the flushing process ends. After closing the switch valve 8, the first venturi valve 2 injects liquid into the balance chamber 61 again through the second water inlet pipe 5. The pressure in the balance chamber 61 rises, pushing the diaphragm 63 to re-seal the drain chamber 62. At the same time, the second venturi valve 41 draws in air again to mix with the water flow, replenishing the pressure in pressure vessel 1 until the pressure is balanced. The system returns to the initial standby state, waiting for the next flushing command.

[0042] The differential pressure valve body 6 of this application eliminates the small aperture structure of the "pressure boosting hole and pressure relief hole" of the traditional differential pressure valve. The opening and closing of the diaphragm 63 depends on the pressure difference between the balance chamber and the drain chamber. The fluid achieves bidirectional flow in the pipeline, "entering when storing pressure and exiting when flushing". Flocculent viscous substances have no small aperture to adhere to and accumulate, thus solving the blockage problem from the root.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure flushing system, characterized in that, The device includes a differential pressure valve body (6), in which a diaphragm (63) is movably disposed. The diaphragm (63) divides the differential pressure valve body (6) into a balance chamber (61) and a drain chamber (62). A water passage chamber (60) is also formed in the differential pressure valve body (6). The diaphragm (63) is used to open and close the opening of the drain chamber (62). When water enters the balance chamber (61), the diaphragm (63) moves toward the drain chamber (62) to close the opening of the drain chamber (62). When the balance chamber (61) is depressurized, the diaphragm (63) moves toward the balance chamber (61) to open the opening of the drain chamber (62). The drain chamber (62) is connected to the water passage chamber (60). It also includes a multi-way pipe joint, a first inlet pipe (3), a second inlet pipe (5), a pressure vessel (1), an outlet pipe (7), and a siphon valve assembly (9); the multi-way pipe joint is provided with an inlet (20), one end of the first inlet pipe (3) is connected to the multi-way pipe joint, and the other end is simultaneously connected to the water passage chamber (60) of the pressure vessel (1) and the differential pressure valve body (6); one end of the second inlet pipe (5) is connected to the multi-way pipe joint, and the other end is connected to the balance chamber (61) of the differential pressure valve body (6); one end of the outlet pipe (7) is connected to the drain chamber (62), and the other end is equipped with a siphon valve assembly (9), which is provided with an outlet (91); one end of the multi-way pipe joint is assembled on the siphon assembly (9) and connected to the outlet pipe (7), and a switch valve (8) is installed between the multi-way pipe joint and the outlet pipe (7).

2. The pressure flushing system as described in claim 1, characterized in that, The multi-way pipe connector is a first venturi valve (2), and the air intake of the first venturi valve (2) is connected to the balance chamber (61) of the second water inlet pipe (5) and the differential pressure valve body (6).

3. The pressure flushing system as described in claim 1, characterized in that, It also includes a connector (4), which is assembled between the outlet pipe (7) and the differential pressure valve body (6). The specific structure of the connector (4) includes: a second venturi valve (41) and a connecting pipe (45). One end of the second venturi valve (41) is connected to the first inlet pipe (3), and the other end is connected to the water passage chamber (60) of the differential pressure valve body (6). One end of the connecting pipe (45) is connected to the outlet pipe (7), and the other end is connected to the drain chamber (62) of the differential pressure valve body (6).

4. The pressure flushing system as described in claim 3, characterized in that, One end of the connector (4) is formed with an air intake (43) of a second venturi valve (41), and one end of the air intake (43) is equipped with a second one-way valve (44).

5. A pressure flushing system as described in claim 3, characterized in that, A first check valve (42) is installed between the second venturi valve (41) and the first water inlet pipe (3).

6. The pressure flushing system as described in claim 1, characterized in that, The number of pressure vessels (1) is two, and each of the two pressure vessels (1) is provided with a third pipeline (11), and the two third pipelines (11) are respectively connected to the water passage chamber (60) of the differential pressure valve body (6).

7. A pressure flushing system as described in claim 1, characterized in that, The diaphragm (63) is provided with an elastic reset member (65) on the side near the balance chamber (61). The elastic reset member (65) is a compression spring, with one end of the compression spring abutting against the diaphragm (63) and the other end abutting against the inner wall of the balance chamber (61).

8. A pressure flushing system as described in claim 1, characterized in that, The inlet end of the switching valve (8) is equipped with a pressure relief valve (10).

9. A pressure flushing system as described in claim 1, characterized in that, The first water inlet pipe (3) is equipped with a filter screen (12) at one end near the water inlet (20).

10. A toilet, characterized in that, Includes a pressure flushing system as described in any one of claims 1 to 9.

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