Sewage discharge system and method for single toilet stool

Abstract

The sewage discharge system comprises a whipping pump arranged at the top of a tank body and a sewage discharge port arranged at the bottom of the tank body, and the sewage discharge port is connected with a one-way valve I. The sewage discharge system is structurally characterized in that the tank body is hollow, a partition plate is arranged in the middle of the tank body to divide the tank body into an upper tank and a lower tank, and a sewage suction port is formed in the waist of the lower tank; the upper portion and the lower portion of the tank body are respectively provided with a saddle convenient for wall-mounted installation, and the saddle is provided with a fluid valve which is respectively connected with tap water and a water inlet of the toilet bowl. The device is low in power consumption, short in operation period, strong in suction force, simple and reliable in structure and free of adverse effects on the environment.

Description

Technical Field

[0001] The present invention relates to sanitary ware, and more particularly to a sewage discharge system and method for a single toilet bowl. Background Art

[0002] Saving water has become a common habit in people's daily lives. Since vacuum toilets can significantly save water for flushing toilets, they have been widely used for pumping sewage in bathrooms. Single - body vacuum toilets are widely favored by users because of their small size, low cost, and low power consumption. However, common single - body vacuum toilets still have some functional details that are not well - done and cannot be fully accepted by the market.

[0003] For example, a pneumatic drainage device with water - saving function disclosed in the patent with application number CN201621444554.1, "comprises a toilet bowl, a sewage tank connected to the toilet bowl, a positive - pressure tank and a negative - pressure tank connected to the sewage tank, both the positive - pressure tank and the negative - pressure tank are connected to a vacuum pump, a vacuum diaphragm valve is provided between the toilet bowl and the sewage tank, the vacuum diaphragm valve is also connected to the negative - pressure tank, a first solenoid valve is provided between the vacuum diaphragm valve and the negative - pressure tank, second and third solenoid valves are provided between the positive - pressure tank, the negative - pressure tank and the vacuum pump respectively, fourth and fifth solenoid valves are provided between the positive - pressure tank, the negative - pressure tank and the sewage tank respectively; the sewage tank is also connected with a drain pipe, and the drain pipe is arranged at the lower side of the side wall of the sewage tank; a check valve is provided between the vacuum diaphragm valve and the sewage tank". After opening the fifth solenoid valve, the first solenoid valve and the vacuum diaphragm valve to make the sewage tank generate negative pressure, due to the lack of corresponding measures for the drain pipe, the negative pressure in the sewage tank often leaks through the drain pipe and cannot normally suck the sewage in the toilet bowl. In addition, during the process of the vacuum pump of this device pumping the negative - pressure tank into a vacuum, the air in the negative - pressure tank will be discharged into the bathroom in turn through the vacuum pump and the second solenoid valve. Since the air in the negative - pressure tank comes from the sewage tank through the solenoid valve five, the gas discharged into the bathroom will pollute the bathroom air, resulting in poor user experience.

[0004] Another example is an intelligent cloud health toilet disclosed in the patent with the application number 201610067440.8, which "comprises a container, at least one water spray pipe is arranged in the container, the water spray pipe is connected with an electromagnetic water valve, the electromagnetic water valve is connected with a controller, a touch screen is arranged on the controller, the controller is connected with a vacuum pumping and sucking pump, an air inlet and an air outlet are arranged on the vacuum pumping and sucking pump, the air inlet is connected with an air extraction tank, the air outlet is connected with a sewage tank, the controller is connected with a first electromagnetic valve, and the sewage tank is connected with the air extraction tank through the first electromagnetic valve; a discharge pipe is arranged on the container, the discharge pipe is connected with a one-way valve, and the one-way valve is connected with the sewage tank". In its embodiment 1, it can only discharge sewage downward by gravity; in the sewage discharge process of embodiment 2, the vacuum pumping and sucking pump is used to pump the air in the air extraction tank into the sewage tank for slow pressurization. Not only is the sewage discharge height limited, but the dirt often cannot be discharged together with the sewage; in embodiment 3, "the air outlet 15 is connected with an air injection tank 28, the air injection tank 28 is connected with a third electromagnetic valve 29, and the third electromagnetic valve 29 is connected with the controller 12. The vacuum pumping and sucking pump 13 fills the air injection tank 28 with gas through the air outlet 15. When the pressure of the air injection tank 28 reaches the specified value, the controller 12 controls the third electromagnetic valve 29 to open, and the air injection tank 28 pressurizes the sewage tank 22". An air injection tank is added between the air outlet of the vacuum pumping and sucking pump and the sewage tank. In this structure, if the pressure in the air injection tank is to reach the specified value, the air inlet needs to supplement air through the air extraction tank and the container discharge pipe (that is, the toilet suction port) in sequence. During the air supplement process, due to the sewage sucked into the sewage tank from the toilet and the water seal in the toilet, there will be a gurgling sound, and the user experience is not good.

[0005] For the above two patents, due to the large number of components and the cumbersome process flow, the entire sewage pumping and discharging process takes a long time, reaching more than 60 seconds; moreover, the negative pressure tank and the sewage tank are set separately. When sucking sewage, the negative pressure tank and the sewage tank are connected, and the negative pressure in the negative pressure tank is used to make the sewage tank also in a negative pressure state, but the negative pressure value is significantly reduced, affecting the suction force and being not conducive to the use in public toilets. Summary of the Invention

[0006] Aiming at the defects of the prior art, the present invention provides a single - body toilet sewage discharge system and method that adopts vacuum suction, has a simple and reasonable structure, low manufacturing cost, simple and reliable process flow, stable working performance, and will not cause adverse effects on the toilet environment.

[0007] The present invention is realized by adopting the following technical solutions: a single - body toilet sewage discharge system and method, comprising a pumping and sucking pump arranged at the top of the tank body and a sewage discharge port arranged at the bottom of the tank body. The sewage discharge port is connected with a first one - way valve. Its structural feature is that the tank body is hollow, and a partition is arranged in the middle to divide the tank body into an upper tank and a lower tank. A sewage suction port is arranged at the waist of the lower tank, and the sewage suction port is connected to the sewage discharge pipe of the toilet through a vacuum diaphragm valve and a second one - way valve in sequence; among them, The top of the lower tank is provided with an air nozzle connected to the inlet of the filter. The outlet of the filter is respectively connected to a pressure gauge, pressure sensors one and two, a two-way solenoid valve one, a three-way solenoid valve for controlling the switch of the vacuum diaphragm valve, and the suction port of the pumping pump. The three-way solenoid valve is arranged on and connected to the control port of the vacuum diaphragm valve. The top of the upper tank is respectively provided with an air inlet, a positive pressure gauge, a pressure sensor two, and a safety valve. The air inlet is connected to the exhaust port of the pumping pump through a pipeline via a check valve three, and the opening direction of the check valve three is towards the upper tank. An exhaust pipe leading directly to the bottom end inside the tank is also provided at the waist of the upper tank, and the exhaust pipe is connected to the outlet of the filter via a two-way solenoid valve two. Saddle seats facilitating wall-mounted installation are respectively provided at the upper and lower parts of the tank body, and fluid valves are provided on the saddle seats. The fluid valves are respectively connected to tap water and the water inlet of the toilet. The pumping pump, pressure sensor one, pressure sensor two, two-way solenoid valve one, two-way solenoid valve two, three-way solenoid valve, and fluid valve are electrically connected to a control system arranged at the waist of the tank body. The control system further includes a button, a foot pedal, or an induction flushing switch.

[0008] Further, a baffle is also provided inside the lower tank to prevent sewage from splashing after being sucked into the lower tank. The splashing sewage enters components such as the three-way solenoid valve and the pumping pump through the air nozzle, resulting in equipment failure.

[0009] Further, both the check valve one and the check valve two are flap-type check valves installed horizontally. The opening direction of the check valve one is away from the tank body, and the opening direction of the check valve two is towards the tank body.

[0010] Further, the check valve one is connected to a sewage discharge pipe, and the sewage discharge pipe can be arranged in all directions of up, down, left, and right.

[0011] Further, the toilet can be a squat toilet, a floor-standing toilet, or a wall-mounted toilet made of stainless steel or ceramic.

[0012] Further, the pressure gauge and the positive pressure gauge respectively reflect the pressure states of the lower tank and the upper tank, facilitating fault repair.

[0013] Further, when the single-toilet sewage discharge system is powered on in a power-off state, it first discharges sewage. The control system detects the positive pressure in the upper tank through the pressure sensor two. If it is greater than or equal to the set value, the two-way solenoid valve two is directly opened for sewage discharge. If it is less than the set value, the two-way solenoid valve one and the pumping pump are opened simultaneously. The outside air is compressed by the pumping pump through the two-way solenoid valve one to the upper tank until the pressure in the upper tank reaches the set value, then the two-way solenoid valve one and the pumping pump are powered off and closed, and then the two-way solenoid valve two is opened for sewage discharge. During sewage discharge, the upper tank is connected to the lower tank, and the compressed air in the upper tank sequentially passes through the two-way solenoid valve two and the filter and is discharged into the lower tank. Under the action of positive pressure, the sewage in the lower tank together with the compressed air is instantaneously discharged into the sewage discharge pipe through the check valve one. After a set time, the two-way solenoid valve two is closed, and the sewage discharge is completed. Then, apply pressure and start the pumping and drawing pump. The air in the lower tank is drawn into the upper tank by the pumping and drawing pump through the filter until the pressure sensor 1 detects that the negative pressure reaches the set value. Then, open the two-way solenoid valve 1, and the outside air is continuously compressed into the upper tank by the pumping and drawing pump through the two-way solenoid valve 1 until the pressure sensor 2 detects that the pressure in the upper tank reaches the set value. Then, the two-way solenoid valve 1 and the pumping and drawing pump are powered off and closed; Finally, standby. At this time, the lower tank is in negative pressure and the upper tank is in positive pressure.

[0014] Furthermore, in the standby state of the single toilet sewage discharge system, after the flushing switch receives an electrical signal, it flushes first. After the fluid valve is opened for a set time, it closes. Under the action of the tap water pressure, the tap water flushes the toilet; Then, suck the sewage. Open the three-way solenoid valve, connect the control port of the vacuum diaphragm valve to the negative pressure. The vacuum diaphragm valve opens under the action of the negative pressure. Under the action of the negative pressure, the sewage in the toilet is successively sucked into the lower tank through the check valve 2, the vacuum diaphragm valve and the sewage suction port. After a set time, the three-way solenoid valve is powered off and the vacuum diaphragm valve closes; Then, discharge the sewage. Open the two-way solenoid valve 2, and the compressed air in the upper tank is successively discharged into the lower tank through the two-way solenoid valve 2 and the filter. Under the action of the positive pressure, the sewage in the lower tank is instantly discharged into the sewage pipe together with the compressed air through the check valve 1. After a set time, the two-way solenoid valve 2 closes and the sewage discharge is completed; Then, apply pressure and start the pumping and drawing pump. The air in the lower tank is drawn into the upper tank by the pumping and drawing pump through the filter until the pressure sensor 1 detects that the negative pressure reaches the set value. Then, open the two-way solenoid valve 1, and the outside air is continuously compressed into the upper tank by the pumping and drawing pump through the two-way solenoid valve 1 until the pressure sensor 2 detects that the pressure in the upper tank reaches the set value. Then, the two-way solenoid valve 1 and the pumping and drawing pump are powered off and closed; Finally, standby to complete the entire sewage discharge process.

[0015] Beneficial effects: Due to the above structure and operation process, the entire operation cycle of the present invention only takes more than 30 seconds, and it has strong suction, simple and reliable structure, and has no adverse impact on the environment.

[0016] The following further describes the present invention in conjunction with the drawings and embodiments. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 It is a front view structural schematic diagram of an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the process structure of an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of an embodiment of the tank body of the present invention. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here.

[0024] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0025] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0026] In addition, terms such as "arranged", "provided with", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In addition, the meaning of the term "plurality" should be two or more.

[0028] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] As Figures 1 to 4 shown, a monomer toilet sewage discharge system and method include a pumping pump 16 provided at the top of the tank body 5 and a sewage discharge port 511 provided at the bottom of the tank body. The sewage discharge port is connected to a first one-way valve 4. The tank body 5 is hollow, and saddle seats 6 facilitating wall-mounted installation are respectively provided at the upper and lower parts of the tank body. A fluid valve 7 is provided on the saddle seat. The fluid valve is respectively connected to tap water and the water inlet of the toilet 1. A partition plate 530 is provided in the middle of the tank body, dividing the tank body into an upper tank 520 and a lower tank 510. A baffle 514 is provided in the lower tank 510. A sewage suction port 512 is provided at the waist of the lower tank. The sewage suction port is successively connected to the sewage discharge pipe of the toilet 1 through a vacuum diaphragm valve 2 and a second one-way valve 17. An air nozzle 513 is provided at the top of the lower tank and is connected to the inlet of a filter 9. The outlet of the filter is respectively connected to a pressure gauge 10, a first pressure sensor 18, a first two-way solenoid valve 12, a three-way solenoid valve 3 for controlling the opening and closing of the vacuum diaphragm valve 2, and the suction port of the pumping pump 16. The three-way solenoid valve 3 is provided on the control port of the vacuum diaphragm valve 2 and is connected thereto. An air inlet 521, a positive pressure gauge 13, a second pressure sensor 14, and a safety valve 19 are respectively provided at the top of the upper tank 520. The air inlet 521 is connected to the exhaust port of the pumping pump 16 through a pipeline via a third one-way valve 15. The opening direction of the third one-way valve 15 faces the upper tank 520. An exhaust pipe 522 directly leading to the bottom end inside the tank is further provided at the waist of the upper tank. The exhaust pipe is connected to the outlet of the filter 9 through a second two-way solenoid valve 11. The pumping pump 16, the first pressure sensor 18, the second pressure sensor 14, the first two-way solenoid valve 12, the second two-way solenoid valve 11, the three-way solenoid valve 3, and the fluid valve 7 are electrically connected to a control system 8 provided at the waist of the tank body 5. The control system further includes a flushing switch.

[0030] In the power-off or standby state, the pumping pump 16, the first two-way solenoid valve 12, the second two-way solenoid valve 11, the three-way solenoid valve 3, the vacuum diaphragm valve 2, and the fluid valve 7 are all in a closed or stopped state.

[0031] When powered on in the power-off state, first perform sewage discharge. The control system 8 detects the positive pressure in the upper tank 520 through the second pressure sensor 14. If it is greater than or equal to the set value, the second two-way solenoid valve 11 is directly opened for sewage discharge. If it is less than the set value, the first two-way solenoid valve 12 and the pumping pump 16 are opened simultaneously. The outside air is compressed by the pumping pump 16 through the first two-way solenoid valve 12 into the upper tank 520 until the pressure in the upper tank reaches the set value, then the first two-way solenoid valve 12 and the pumping pump 16 are powered off and closed. Then open the second two-way solenoid valve 11 for sewage discharge. During sewage discharge, the upper tank 520 is connected to the lower tank 510, and the compressed air in the upper tank is sequentially discharged into the lower tank 510 through the second two-way solenoid valve 11 and the filter 9. Under the action of positive pressure, the sewage in the lower tank together with the compressed air is instantaneously discharged into the sewage pipe through the first one-way valve 4. After a set time, the second two-way solenoid valve 11 is closed, and the sewage discharge is completed; then perform pressure boosting. The pumping pump 16 is started, and the air in the lower tank 510 is pumped into the upper tank 520 by the pumping pump 16 through the filter 9 until the first pressure sensor 18 detects that the negative pressure reaches the set value, then the first two-way solenoid valve 12 is opened, and the outside air continues to be compressed by the pumping pump 16 through the first two-way solenoid valve 12 into the upper tank 520 until the second pressure sensor 14 detects that the pressure in the upper tank 520 reaches the set value, then the first two-way solenoid valve 14 and the pumping pump 16 are powered off and closed; finally, standby. At this time, the lower tank 510 is in negative pressure and the upper tank 520 is in positive pressure.

[0032] In the standby state, after the user finishes using the toilet and presses the flushing switch, first perform flushing. The fluid valve 7 is opened for a set time and then closed. Under the action of the tap water pressure, the tap water flushes the toilet; then perform sewage suction. The three-way solenoid valve 3 is opened, and the control port of the vacuum diaphragm valve 2 is connected to negative pressure. The vacuum diaphragm valve is opened under the action of negative pressure. Under the action of negative pressure, the sewage in the toilet 1 is sequentially sucked into the lower tank 520 through the second one-way valve 17, the vacuum diaphragm valve 2 and the sewage suction port 512. After a set time, the three-way solenoid valve 3 is powered off and the vacuum diaphragm valve 2 is closed; then perform sewage discharge. The second two-way solenoid valve 11 is opened, and the compressed air in the upper tank 510 is sequentially discharged into the lower tank 510 through the second two-way solenoid valve 11 and the filter 9. Under the action of positive pressure, the sewage in the lower tank together with the compressed air is instantaneously discharged into the sewage pipe through the first one-way valve 4. After a set time, the second two-way solenoid valve 11 is closed, and the sewage discharge is completed; then perform pressure boosting. The pumping pump 16 is started, and the air in the lower tank 510 is pumped into the upper tank 520 by the pumping pump 16 through the filter 9 until the first pressure sensor 18 detects that the negative pressure reaches the set value, then the first two-way solenoid valve 12 is opened, and the outside air continues to be compressed by the pumping pump 16 through the first two-way solenoid valve 1 into the upper tank 520 until the second pressure sensor 14 detects that the pressure in the upper tank 520 reaches the set value, then the first two-way solenoid valve 12 and the pumping pump 16 are powered off and closed; finally, standby, completing the entire sewage discharge process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A monomer toilet sewage discharge system and method, including a pumping pump (16) arranged at the top of the tank body (5) and a sewage discharge port (511) arranged at the bottom of the tank body. The sewage discharge port is connected to a first one-way valve (4). Its structural feature is that the tank body (5) is hollow, and a partition plate (530) is arranged in the middle to divide the tank body into an upper tank (520) and a lower tank (510). A sewage suction port (512) is arranged at the waist of the lower tank. The sewage suction port is successively connected to the sewage discharge pipe of the toilet (1) through a vacuum diaphragm valve (2) and a second one-way valve (17); among them, a nozzle (513) is arranged at the top of the lower tank (510) and is connected to the inlet of a filter (9). The outlet of the filter is respectively connected to a pressure gauge (10), a first pressure sensor (18), a first two-way solenoid valve (12), a three-way solenoid valve (3) for controlling the opening and closing of the vacuum diaphragm valve (2), and the suction port of the pumping pump (16). The three-way solenoid valve (3) is arranged on the control port of the vacuum diaphragm valve (2) and is connected to it; an air inlet (521), a positive pressure gauge (13), a second pressure sensor (14), and a safety valve (19) are respectively arranged at the top of the upper tank (520). The air inlet (521) is connected to the exhaust port of the pumping pump (16) through a pipe via a third one-way valve (15). The opening direction of the third one-way valve (15) faces the upper tank (520). A straight exhaust pipe (522) leading to the bottom end inside the tank is also arranged at the waist of the upper tank. The exhaust pipe is connected to the outlet of the filter (9) through a second two-way solenoid valve (11); saddles (6) for facilitating wall-mounted installation are respectively arranged at the upper and lower parts of the tank body (5). A fluid valve (7) is arranged on the saddle and is respectively connected to tap water and the water inlet of the toilet (1); the pumping pump (16), the first pressure sensor (18), the second pressure sensor (14), the first two-way solenoid valve (12), the second two-way solenoid valve (11), the three-way solenoid valve (3), and the fluid valve (7) are electrically connected to a control system (8) arranged at the waist of the tank body (5). The control system also includes a button, a foot pedal, or an induction flushing switch.

2. The monomer toilet sewage discharge system and method according to claim 1, characterized in that: A baffle (530) is also arranged inside the lower tank (520) to prevent sewage from splashing after being sucked into the lower tank. The splashing sewage enters components such as the three-way solenoid valve (3) and the pumping pump (16) through the nozzle (513), resulting in equipment failure.

3. A monomer toilet sewage discharge system and method according to claim 2, characterized in that: Both the first one-way valve (4) and the second one-way valve (17) are flap-type one-way valves installed horizontally. The opening direction of the first one-way valve (4) deviates from the tank body (5), and the opening direction of the second one-way valve (17) faces the tank body (5).

4. The monomer toilet sewage discharge system and method according to claim 3, characterized in that: The first one-way valve (4) is connected to a sewage discharge pipe, and the sewage discharge pipe can be arranged in all directions of up, down, left, and right.

5. The monomer toilet sewage discharge system and method according to claim 4, characterized in that: The toilet (1) can be a squat toilet, a floor toilet, or a wall-mounted toilet made of stainless steel or ceramic.

6. A monomer toilet sewage discharge system and method according to claim 5, characterized in that: The pressure gauge (10) and the positive pressure gauge (13) respectively reflect the pressure states of the lower tank (510) and the upper tank (520), facilitating fault repair.

7. The monomer toilet sewage discharge system and method according to claim 6, characterized in that: When the single toilet sewage discharge system is powered on in the power-off state, it first discharges sewage. The control system (8) detects the positive pressure of the upper tank (510) through the second pressure sensor (14). If it is greater than or equal to the set value, the second two-way solenoid valve (11) is directly opened for sewage discharge. If it is less than the set value, the first two-way solenoid valve (12) and the pumping pump (16) are opened simultaneously. The outside air is compressed by the pumping pump (16) through the first two-way solenoid valve (12) into the upper tank (520) until the pressure in the upper tank reaches the set value. Then, the first two-way solenoid valve (12) and the pumping pump (16) are powered off and closed. Then, the second two-way solenoid valve (11) is opened for sewage discharge. During sewage discharge, the upper tank (520) is connected to the lower tank (510). The compressed air in the upper tank is discharged into the lower tank (510) through the second two-way solenoid valve (11) and the filter (9) in sequence. Under the action of the positive pressure, the sewage in the lower tank together with the compressed air is instantaneously discharged into the sewage pipe through the first check valve (4). After a set time, the second two-way solenoid valve (11) is closed, and the sewage discharge is completed. Then, it pressurizes. The pumping pump (16) is started. The air in the lower tank (510) is drawn into the upper tank (520) by the pumping pump (16) through the filter (9) until the first pressure sensor (18) detects that the negative pressure reaches the set value. Then, the first two-way solenoid valve (12) is opened. The outside air continues to be compressed by the pumping pump (16) through the first two-way solenoid valve into the upper tank (520) until the second pressure sensor (14) detects that the pressure in the upper tank (510) reaches the set value. Then, the first two-way solenoid valve and the pumping pump (6) are powered off and closed. Finally, it stands by. At this time, the lower tank (510) is in a negative pressure state, and the upper tank (520) is in a positive pressure state.

8. A monomer toilet sewage discharge system and method according to claim 7, characterized in that: When the single toilet sewage discharge system is in the standby state, after the flushing switch receives an electrical signal, it first flushes. The fluid valve (7) is opened for a set time and then closed. Under the action of the tap water pressure, the tap water flushes the toilet (1). Then, it sucks sewage. The three-way solenoid valve (3) is opened. The control port of the vacuum diaphragm valve (2) is connected to the negative pressure. The vacuum diaphragm valve is opened under the action of the negative pressure. Under the action of the negative pressure, the sewage in the toilet (1) is sucked into the lower tank (510) through the second check valve (17), the vacuum diaphragm valve (2), and the sewage suction port (512) in sequence. After a set time, the three-way solenoid valve (3) is powered off, and the vacuum diaphragm valve (2) is closed. Then, it discharges sewage. The second two-way solenoid valve (11) is opened. The compressed air in the upper tank (520) is discharged into the lower tank (510) through the second two-way solenoid valve (11) and the filter (9) in sequence. Under the action of the positive pressure, the sewage in the lower tank is instantaneously discharged into the sewage pipe together with the compressed air through the first check valve (4). After a set time, the second two-way solenoid valve (11) is closed, and the sewage discharge is completed. Then, the pressure suppression and pumping pump (16) is started. The air in the lower tank (510) is drawn into the upper tank (520) by the pumping pump (16) through the filter (9). Until the pressure sensor one (18) detects that the negative pressure reaches the set value, the two-way solenoid valve one (12) is opened, and the outside air continues to be compressed into the upper tank (520) by the pumping pump (16) through the two-way solenoid valve one. Until the pressure sensor two (14) detects that the pressure in the upper tank reaches the set value, the two-way solenoid valve one (12) and the pumping pump (16) are powered off and closed; Finally, standby to complete the entire sewage discharge process.

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