A bathroom negative pressure deodorization system

Abstract

The application discloses a bathroom negative pressure deodorization system, which comprises a vertical main sewage pipeline, an exhaust pipe and an air extractor. The main sewage pipeline is communicated with a sewage main pipeline which is buried under the floor. Toilet, wash basin, floor drain and other sanitary appliances are connected with the sewage main pipeline through sewage branch pipes. One end of the exhaust pipe extends into the main sewage pipeline as an air extraction end, and the other end extends to the outdoor. The air extractor is installed on the exhaust pipe and located outside the main sewage pipeline. When the air extractor is running, a negative pressure is formed in the main sewage pipeline, the accumulated odor in the pipeline is forced to be extracted and discharged to the outdoor, so that the air pressure level in the main sewage pipeline is effectively reduced, the odor reflux through the connection nodes of the sanitary appliances to the bathroom indoor is blocked, and the bathroom air quality is improved from the root. The system has simple structure and solves the odor reflux problem from the source.

Description

Technical Field

[0001] This invention relates to the field of bathroom deodorization technology, and more specifically to a negative pressure deodorization system for bathrooms. Background Technology

[0002] With the acceleration of urbanization and the continuous increase in building height, multi-story and high-rise buildings have become the mainstream form of modern residence and office. In such buildings, the toilet, as an essential infrastructure on each floor, directly affects the comfort of users. Currently, toilets are generally connected to sanitary fixtures on each floor through a main sewage pipe to achieve centralized discharge of wastewater and sewage. However, during the transportation of sewage, the main sewage pipe easily accumulates a large amount of odorous gas containing harmful components such as sulfides and ammonia. Due to the multiple connection points between the sewage pipe and the toilets on each floor (such as floor drains, sink drains, toilet interfaces, etc.), and the influence of factors such as air pressure fluctuations within the pipe, odors can easily backflow into the room through these interfaces, resulting in persistent odors in the toilets and seriously affecting indoor air quality and user experience.

[0003] To address the aforementioned issues, existing technologies include installing exhaust fans or air purification devices in bathrooms. However, these solutions only address the localized issues of air already diffused into the room and cannot suppress or reduce odor intrusion at its source. To overcome this deficiency, this invention proposes adding a fan to the main sewage pipe. This fan utilizes negative pressure suction to continuously forcefully extract odors from the pipe and discharge them outdoors. This effectively reduces the air pressure level within the main sewage pipe, blocking or reducing the backflow of odors into the bathroom and fundamentally improving the bathroom's air quality. Summary of the Invention

[0004] In view of this, the present invention provides a negative pressure deodorization system for toilets, which adds a fan to the main sewage pipe and uses negative pressure suction to continuously force the odor in the pipe to be extracted and discharged to the outside, thereby effectively reducing the air pressure level in the main sewage pipe, blocking or reducing the backflow of odor into the toilet, and improving the air environment of the toilet from the source.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A negative pressure deodorization system for a bathroom includes: a main sewage pipe, a toilet, a washbasin, a floor drain, an exhaust pipe, and an exhaust fan. The main sewage pipe is vertically arranged and is connected to a main sewage pipe buried under the floor. The sewage outlets of the toilet, the washbasin, and the floor drain are respectively connected to the main sewage pipe through sewage branch pipes. One end of the exhaust pipe is an air extraction end that extends into the interior of the main sewage pipe, and the other end of the exhaust pipe is an exhaust end that extends to the exterior of the building. The exhaust fan is installed on the exhaust pipe and located outside the main sewage pipe; When the exhaust fan is running, a negative pressure is created in the main sewage pipe to draw the odor accumulated inside the main sewage pipe into the exhaust pipe through the exhaust end, and force it to be discharged to the outside through the exhaust end, so as to prevent the odor in the main sewage pipe from flowing back into the bathroom through the toilet, the sink or the floor drain. A controller is installed indoors and is electrically connected to the exhaust fan.

[0007] Furthermore, a one-way valve assembly is installed at each pipe section corresponding to each floor in the main sewage pipe. The one-way valve assembly includes two first one-way valves arranged at intervals along the pipe axis, and the conduction direction of the two first one-way valves is set from top to bottom. The two first one-way valves are used to form an airflow barrier within the main sewage pipe section corresponding to the bathroom on that floor, so as to prevent the odor from flowing back between adjacent floors through the main sewage pipe.

[0008] Furthermore, the air extraction end is a tubular structure, and multiple air extraction holes are opened on the pipe wall that extends into the main sewage pipe. A waterproof cover is also fixedly installed on the outside of the air extraction end. The waterproof cover is placed on the outside of the air extraction hole to prevent sewage falling into the main sewage pipe from splashing into or flowing into the air extraction hole, so as to keep the air passage inside the exhaust pipe unobstructed.

[0009] Furthermore, an odor detection sensor is provided inside the exhaust pipe near the air extraction end, and the odor detection sensor is electrically connected to the controller.

[0010] Furthermore, a negative pressure detection sensor is provided inside the exhaust pipe near the suction end, and the negative pressure detection sensor is electrically connected to the controller.

[0011] Furthermore, the toilet, the washbasin, and the floor drain are all equipped with negative pressure air intakes, each of which is connected to an exhaust branch pipe, and each of which is connected to a main exhaust pipe. The exhaust pipe is connected to a branch pipe, which is connected to the main exhaust pipe. Each of the exhaust branch pipes is equipped with a second one-way valve that directs exhaust from the negative pressure air intake to the main exhaust pipe, in order to prevent odors from flowing between the toilet, the washbasin, and the floor drain.

[0012] Furthermore, the negative pressure suction port on the drain pipe or the odor-proof cover of the drain is connected to the suction branch pipe; the toilet seat and / or toilet lid are both equipped with a first suction chamber, and the first suction chamber has multiple first suction ports facing the toilet opening, and the negative pressure suction ports on the two first suction chambers are respectively connected to the suction branch pipe. Alternatively, a toilet air extraction ring is installed on the toilet seat, and the toilet air extraction ring has a second air extraction chamber inside. The second air extraction chamber has multiple second suction ports facing the toilet opening, and the negative pressure suction port of the second air extraction chamber is connected to the air extraction branch pipe. The washbasin has a third suction chamber inside the wash opening. The third suction chamber has multiple third suction ports facing the wash opening. The negative pressure suction port on the third suction chamber is connected to the suction branch pipe. Alternatively, the washbasin is equipped with a washbasin suction ring, the washbasin suction ring has a fourth suction chamber inside, the fourth suction chamber has multiple fourth suction ports facing the washbasin opening, and the negative pressure suction port on the fourth suction chamber is connected to the suction branch pipe.

[0013] Furthermore, it also includes a urinal, the drain outlet of which is connected to the main sewage pipe via a branch drain pipe; The urinal has a fifth suction chamber inside, and the fifth suction chamber has multiple fifth suction ports facing the urinal opening. The negative pressure suction port on the fifth suction chamber is connected to the suction branch pipe. Alternatively, the urinal may be equipped with a urinal air extraction ring, which has a sixth air extraction chamber inside. The sixth air extraction chamber has multiple sixth suction ports facing the urinal opening, and the negative pressure suction port on the sixth air extraction chamber is connected to the air extraction branch pipe.

[0014] Furthermore, it also includes a squat toilet, the drain outlet of which is connected to the main sewage pipe via a branch drain pipe; The squat toilet has a seventh suction chamber inside, and the seventh suction chamber has multiple seventh suction ports facing the defecation opening. The negative pressure suction port on the seventh suction chamber is connected to the suction branch pipe. Alternatively, the squat toilet is hinged with a flip cover, the flip cover has an eighth suction chamber inside, the eighth suction chamber has multiple eighth suction ports facing the defecation opening, and the negative pressure suction port on the eighth suction chamber is connected to the suction branch pipe. Alternatively, the squat toilet is equipped with a first foot pedal, the first foot pedal having a ninth suction chamber inside, the ninth suction chamber having multiple ninth suction ports facing the defecation opening, and the negative pressure suction port on the ninth suction chamber being connected to the suction branch pipe. Alternatively, the squat toilet 21 is hinged with a second foot pedal 27 and a cover plate 28. Both the second foot pedal 26 and the cover plate 27 are provided with a tenth suction chamber 271. The tenth suction chamber 271 has multiple tenth suction ports 2711 facing the defecation opening. The negative pressure suction ports on the two tenth suction chambers 271 are respectively connected to the suction branch pipe 14.

[0015] Furthermore, it also includes an exhaust fan installed in the bathroom, the exhaust fan being electrically connected to the controller, the exhaust fan's exhaust pipe being directly discharged outdoors or connected to the exhaust pipe, and the exhaust pipe being equipped with a third one-way valve that directs exhaust from the exhaust fan to the exhaust pipe in one direction.

[0016] This invention constructs a comprehensive and proactive bathroom deodorization system by combining multi-level negative pressure suction with intelligent control: The exhaust fan in the main sewage pipe continuously generates negative pressure, blocking the backflow of odors into the room through the connection points of each sanitary fixture at the source. Combined with one-way valves installed on each floor, this effectively prevents odor cross-flow between adjacent floors, achieving airtight isolation at the main pipe level of the entire building. Simultaneously, by integrating or adding suction chambers and suction ports to various sanitary fixtures such as toilets, washbasins, urinals, and squat toilets, localized targeted suction is performed at the first moment odor is generated, significantly improving deodorization efficiency and thoroughness. Furthermore, the system is equipped with odor and negative pressure detection sensors to achieve automatic start / stop and precise negative pressure control, and can be optionally equipped with indoor exhaust fans to assist ventilation. Thus, while ensuring long-term stable operation of the equipment, it achieves on-demand intelligent deodorization and multi-level collaborative treatment, significantly improving bathroom air quality. It also boasts comprehensive advantages such as energy saving and environmental protection, flexible installation, strong adaptability, and high reliability. Attached Figure Description

[0017] 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a negative pressure deodorization system for a bathroom provided by the present invention.

[0019] Figure 2 for Figure 1 A magnified schematic diagram of the structure of part A in the middle.

[0020] Figure 3 This is a schematic diagram of the structure of a toilet air seal.

[0021] Figure 4 for Figure 1A magnified schematic diagram of the structure of part B in the middle.

[0022] Figure 5 A diagram illustrating the installation of a urinal air extraction ring.

[0023] Figure 6 for Figure 1 A magnified schematic diagram of the structure of part C in the middle.

[0024] Figure 7 A diagram illustrating the installation of a flip-top lid on a squat toilet.

[0025] Figure 8 This is a schematic diagram of the first foot pedal of a squat toilet.

[0026] Figure 9 A schematic diagram showing the installation of a second foot pedal and cover for a squat toilet.

[0027] Figure 10 for Figure 1 A magnified schematic diagram of the structure of part D in the middle.

[0028] Figure 11 This is an exploded diagram of the washbasin and its exhaust fan.

[0029] Figure 12 for Figure 1 A magnified schematic diagram of the structure of part E in the middle.

[0030] Figure 13 This is a schematic diagram of another embodiment of a floor drain. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0033] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] like Figures 1-11 As shown, this invention discloses a negative pressure deodorization system for a bathroom, including: a main sewage pipe 1, a toilet 2, a washbasin 3, a floor drain 4, an exhaust pipe 5, and an exhaust fan 6. The main sewage pipe 1 is vertically arranged and is connected to the main sewage pipe 7 buried under the floor. The sewage outlets of the toilet 2, washbasin 3, and floor drain 4 are respectively connected to the main sewage pipe 7 through sewage branch pipes 8. One end of the exhaust pipe 5 is an air extraction end 51 that extends into the interior of the main sewage pipe 1, and the other end of the exhaust pipe 5 is an exhaust end 52 that extends to the outside of the building. The exhaust fan 6 is installed on the exhaust pipe 5 and is located outside the main sewage pipe 1; When the exhaust fan 6 is running, a negative pressure is formed in the main sewage pipe 1 to draw the odor accumulated inside the main sewage pipe 1 into the exhaust pipe 5 through the exhaust end 51 and force it to be discharged to the outside through the exhaust end 52, so as to prevent the odor in the main sewage pipe 1 from flowing back into the bathroom through the toilet 2, washbasin 3 or floor drain 4. Controller 9 is installed indoors and is electrically connected to exhaust fan 6.

[0036] In this embodiment, the controller 9 activates the exhaust fan 6, which creates a negative pressure state inside the exhaust pipe 5 and the main sewage pipe 1 connected to it. Under this negative pressure, odorous gases containing sulfides, ammonia, etc., accumulated in the main sewage pipe 1 are drawn into the extraction end 51 and transported through the exhaust pipe 5 to the exhaust end 52 for discharge outdoors. Because the main sewage pipe 1 is under negative pressure, its internal air pressure is lower than the indoor air pressure in the bathroom, preventing odors from diffusing back into the room through the sewage branch pipes 8 connecting the toilet 2, washbasin 3, floor drain 4, etc., thus achieving the effect of blocking the backflow of odors from the source.

[0037] Therefore, the deodorization system of the present invention actively extracts and forces the discharge of odors from the main sewage pipe at the source, thus eliminating the problem of odor backflow; and by maintaining negative pressure, it effectively blocks the path of odors spreading into the room through the connection nodes of each sanitary fixture; the deodorization system is suitable for multi-story / high-rise buildings, realizing centralized deodorization of bathrooms on all floors of the building.

[0038] In some embodiments, a one-way valve assembly is provided at each pipe section corresponding to each floor in the main sewage pipe 1. The one-way valve assembly includes two first one-way valves 10 arranged at intervals along the pipe axis, and the conduction direction of the two first one-way valves 10 is set from top to bottom. Two first one-way valves 10 are used to create airflow isolation within the main sewage pipe 1 section corresponding to the bathroom on that floor, to prevent odors from flowing back through the main sewage pipe 1 between adjacent floors. This achieves airflow isolation between floors and prevents odors from flowing between adjacent floors.

[0039] In some embodiments, the air extraction end 51 is a tubular structure, and a plurality of air extraction holes 511 are provided on the pipe wall extending into the main sewage pipe 1. A waterproof cover 11 is also fixedly installed on the outside of the air extraction end 51. The waterproof cover 11 covers the outside of the air extraction hole 511 to prevent sewage falling into the main sewage pipe 1 from splashing into or flowing into the air extraction hole 511, so as to keep the air passage inside the exhaust pipe 5 unobstructed.

[0040] After the exhaust fan 6 is started, the odor in the main sewage pipe 1 enters the exhaust pipe 5 through multiple exhaust holes 511 on the pipe wall of the exhaust end 51. When the upper sewage falls through the main sewage pipe 1, the waterproof cover 11 covers the outside of the exhaust hole 511, which plays a role in shielding and guiding the flow, so that the falling sewage slides down the surface of the waterproof cover 11 and cannot directly splash into or flow into the exhaust hole 511, thereby ensuring that the exhaust channel is not blocked or contaminated by sewage.

[0041] In some embodiments, an odor detection sensor 12 is provided inside the exhaust pipe 5 near the exhaust end 51, and the odor detection sensor 12 is electrically connected to the controller 9.

[0042] Odor detection sensor 12 monitors the gas composition inside exhaust pipe 5 near extraction end 51 in real time, detecting odor concentration (such as the concentration of characteristic gases like hydrogen sulfide and ammonia). The detection signal is transmitted to controller 9 in real time. When the sensor detects that the odor concentration is higher than a preset threshold, controller 9 can automatically start the extraction fan 6 for extraction; when the odor concentration drops below the set value, controller 9 can control the fan to stop or reduce its speed.

[0043] Therefore, odor detection sensors can automate the system without human intervention, improving its intelligence level; they can start and stop the fan as needed based on the actual odor concentration, saving energy and reducing operating costs; they can prevent the fan from running continuously for a long time, extending the equipment's lifespan; and they can ensure that the air quality in the restroom is always good.

[0044] In some embodiments, a negative pressure detection sensor 13 is provided inside the exhaust pipe 5 near the exhaust end 51, and the negative pressure detection sensor 13 is electrically connected to the controller 9.

[0045] The negative pressure detection sensor 13 monitors the air pressure value near the suction end 51 in the exhaust pipe 5 in real time and transmits the pressure signal to the controller 9. Based on the pressure data fed back by the negative pressure detection sensor 13, the controller 9 adjusts the speed or stops the suction fan 6 in real time to maintain the negative pressure value in the main sewage pipe 1 within the set optimal operating range. When a leak or blockage occurs in the system, causing abnormal negative pressure, the controller 9 can promptly issue an alarm signal.

[0046] In other embodiments, the toilet 2, washbasin 3, and floor drain 4 are each equipped with a negative pressure suction port, each negative pressure suction port is connected to a suction branch pipe 14, each suction branch pipe 14 is connected to a main suction pipe 15, the exhaust pipe 5 is connected to a branch pipe 53, the branch pipe 53 is connected to the main suction pipe 15, and each suction branch pipe 14 is equipped with a second one-way valve 16 that guides the exhaust from the negative pressure suction port to the main suction pipe 15, in order to prevent the odor from flowing between the toilet 2, washbasin 3, and floor drain 4.

[0047] During system operation, the negative pressure generated by the exhaust fan 6 is transmitted to the negative pressure suction ports of each sanitary fixture through the exhaust pipe 5, branch pipes 53, main exhaust pipe 15, and each exhaust branch pipe 14. Under the action of negative pressure, odors generated inside or near each sanitary fixture are drawn in by their respective exhaust branch pipes 14, converge into the exhaust pipe 5 through the main exhaust pipe 15, and finally discharged outdoors. The second one-way valve 16 installed on each exhaust branch pipe 14 only allows gas to flow from the negative pressure suction port of the sanitary fixture to the main exhaust pipe 15, preventing reverse airflow.

[0048] Therefore, this embodiment achieves multi-point, source-based extraction of odors from various sanitary fixtures, resulting in more thorough deodorization; the second one-way valve effectively prevents odors from flowing between sanitary fixtures, avoiding cross-contamination.

[0049] In some embodiments, a suction pipe 14 is connected to the negative pressure suction port on the pipe of the floor drain 4 or on the odor-proof cover 41 of the floor drain 4; the negative pressure suction port is provided on the odor-proof cover 41 to prevent the floor drain pipe from being blocked and to prevent sewage from flowing back into the negative pressure suction port of the odor-proof cover 41.

[0050] The toilet seat 201 and / or the toilet lid 202 both have a first suction chamber 2011 inside. The first suction chamber 2011 has multiple first suction ports 20111 facing the toilet opening. The negative pressure suction ports on the two first suction chambers 2011 are respectively connected to suction branch pipes 14. Alternatively, a toilet air extraction ring 17 is installed on the seat ring 201 of the toilet 2 by screws, adhesive or snap-fit. The toilet air extraction ring 17 has a second air extraction chamber 171 inside. The second air extraction chamber 171 has multiple second suction ports 1711 facing the toilet opening. The negative pressure suction port on the second air extraction chamber 171 is connected to the air extraction branch pipe 14. The washbasin 3 has a third suction chamber 31 inside the wash opening. The third suction chamber 31 has multiple third suction ports 311 facing the wash opening. The negative pressure suction port on the third suction chamber 31 is connected to the suction branch pipe 14. Alternatively, a sink suction ring 18 is installed on the sink 3 by screws, adhesive, or snap-fit. The sink suction ring 18 has a fourth suction chamber 181 inside. The fourth suction chamber 181 has multiple fourth suction ports 1811 facing the sink opening. The negative pressure suction port on the fourth suction chamber 181 is connected to the suction branch pipe 14.

[0051] Taking the toilet system as an example: When the exhaust fan 6 is running, negative pressure is transmitted to the first suction chamber 2011 inside the seat ring 201 (or the second suction chamber 171 of the toilet suction ring 17), forming a negative pressure suction area near the toilet opening through multiple first suction ports 20111 (or second suction ports 1711) facing the toilet opening. When the user uses the toilet, the odor generated in the toilet is sucked away by the nearby suction ports before it can spread, and is discharged outdoors through the suction chamber, suction branch pipe 14, suction main pipe 15, and exhaust pipe 5. The same principle applies to the washbasin, forming a negative pressure suction area near the washbasin opening to remove odors or chemical smells generated during hand washing and rinsing.

[0052] The deodorization system of this invention forms a source suction near the toilet / washbasin opening, immediately sucking away odors as soon as they are generated, preventing them from spreading into the indoor space; the integrated solution (inside the seat / washbasin) is aesthetically pleasing and does not take up extra space; the external solution (exhaust ring) facilitates the renovation and upgrading of existing bathrooms without replacing the original fixtures; multiple suction ports are evenly distributed, providing a large suction coverage area and better deodorization effect.

[0053] In addition, in an embodiment where both the toilet seat 201 and / or the toilet lid 202 are equipped with a first suction port, when a person lowers the seat 201 or urinates, both the seat 201 and the toilet lid 202 have a suction function to promptly remove odors near the toilet opening. By incorporating a suction function into the toilet seat and lid, the problem of sewage backflow into the suction chamber, which is often present in toilets, is avoided when the toilet is clogged. In other words, sewage from the toilet will not backflow into the suction chamber on the seat and lid.

[0054] In other embodiments, the toilet negative pressure deodorization system also includes a urinal 19, the drain outlet of which is connected to the main sewage pipe 7 via a drain branch pipe 8. The urinal 19 has a fifth suction chamber 191 inside, and the fifth suction chamber 191 has a plurality of fifth suction ports 1911 facing the urinal opening. The negative pressure suction port on the fifth suction chamber 191 is connected to the suction branch pipe 14. Alternatively, a urinal suction ring 20 may be installed on the urinal 19 by screws, adhesive, or snap-fit. The urinal suction ring 20 has a sixth suction chamber 2001 inside. The sixth suction chamber 2001 has multiple sixth suction ports 20011 facing the urinal opening. The negative pressure suction port on the sixth suction chamber 2001 is connected to the suction branch pipe 14.

[0055] When the exhaust fan 6 is running, negative pressure is transmitted to the fifth exhaust chamber 191 of the urinal 19 (or the sixth exhaust chamber 2001 of the urinal exhaust ring 20), forming a negative pressure area near the urinal opening through multiple suction ports facing the urinal opening. Odorous gases such as ammonia produced when the user urinates are sucked in by the suction ports before they diffuse, and discharged outdoors through the exhaust chamber, exhaust branch pipe 14, exhaust main pipe 15, and exhaust pipe 5.

[0056] This system targets urinals as a major source of odor by performing targeted suction, compensating for the inadequacy of negative pressure suction from the main sewage pipe; multiple suction ports are evenly distributed to fully cover the urinal area, ensuring suction without any blind spots; the integrated design is clean and tidy, and the external installation design facilitates the modification of existing fixtures; it effectively reduces ammonia concentration in the restroom, improving air quality, and is especially suitable for public restrooms.

[0057] In other embodiments, the toilet negative pressure deodorization system also includes a squat toilet 21, the drain outlet of which is connected to the main drain pipe 7 via a drain branch pipe 8. The squat toilet 21 has a seventh suction chamber 211 inside, and the seventh suction chamber 211 has multiple seventh suction ports 2111 facing the defecation opening. The negative pressure suction port on the seventh suction chamber 211 is connected to the suction branch pipe 14. Alternatively, a flip cover 22 is hinged to the squat toilet 21. The flip cover 22 has an eighth suction chamber 221 inside. The eighth suction chamber 221 has multiple eighth suction ports 2211 facing the defecation opening. The negative pressure suction port on the eighth suction chamber 221 is connected to the suction branch pipe 14. Alternatively, the squat toilet 21 is screwed, glued or snapped to install the first foot pedal 23 of the squat toilet. The first foot pedal 23 of the squat toilet has a ninth air extraction chamber 231 inside. The ninth air extraction chamber 231 has multiple ninth suction ports 2311 facing the defecation opening. The negative pressure suction port on the ninth air extraction chamber 231 is connected to the suction branch pipe 14. Alternatively, the squat toilet 21 is hinged with a second foot pedal 27 and a cover plate 28. Both the second foot pedal 26 and the cover plate 27 are provided with a tenth suction chamber 271. The tenth suction chamber 271 has multiple tenth suction ports 2711 facing the defecation opening. The negative pressure suction ports on the two tenth suction chambers 271 are respectively connected to suction branch pipes 14.

[0058] When the exhaust fan 6 is running, negative pressure is transmitted to the corresponding exhaust chamber of the squat toilet 21, creating a negative pressure zone near the toilet opening through the suction port facing the defecation opening. When the user uses the toilet, the odor generated inside is sucked away nearby. In the flip-top design, the flip-top 22 can be closed when not in use and opened when in use. The suction port is located inside the flip-top 22, and after the flip-top is opened, the suction port faces the defecation opening for suction.

[0059] In addition, in embodiments where both the second foot pedal 27 and the lid 28 of the squat toilet are equipped with a suction function, when a person lowers the second foot pedal 27 or urinates, both the second foot pedal 27 and the lid 28 can promptly remove odors near the toilet opening. This also avoids the problem of sewage backflow into the suction chamber of the squat toilet itself when it becomes clogged. In other words, sewage from the squat toilet will not backflow into the suction chamber of the second foot pedal 27 and the lid 28.

[0060] This system specifically targets squat toilets as a major source of odor, enabling targeted extraction and expanding its applicability. It offers four structural options to flexibly adapt to different styles and installation conditions of squat toilets. The integrated option does not affect the appearance of the squat toilet or the usable space. The flip-top option combines the functions of covering and extraction; when not in use, the flip-top can cover the toilet opening for aesthetics and hygiene, and when in use, it automatically extracts odors. The air-sealing option facilitates the retrofitting of existing squat toilets.

[0061] In all the above-mentioned air extraction chamber designs, a downward-facing drain hole can be opened on the air extraction chamber. This facilitates the timely drainage of water stored in the air extraction chamber, preventing water from entering the exhaust pipe 5 and affecting the air extraction fan.

[0062] In some embodiments, the bathroom negative pressure deodorization system also includes an exhaust fan 24 installed in the bathroom. The exhaust fan 24 is electrically connected to the controller 9. The exhaust pipe 25 of the exhaust fan 24 is directly discharged to the outside or connected to the exhaust pipe 5. The exhaust pipe 25 is provided with a third one-way valve 26 that guides the exhaust fan 25 to the exhaust pipe 5 in one direction.

[0063] When rapid replacement of indoor air in the bathroom is required, the exhaust fan 24 can be activated via controller 9. The exhaust fan 24 draws indoor air into the bathroom through exhaust duct 25 and into exhaust pipe 5, where it is discharged outdoors along with the odorous air extracted from the main sewage pipe 1 through exhaust end 52. The third one-way valve 26 only allows gas to flow from the exhaust fan 24 to the exhaust pipe 5, preventing odorous air in the exhaust pipe 5 from flowing back into the exhaust fan 24 or the room. The exhaust fan 24 can work in conjunction with the extraction fan 6 or operate independently.

[0064] This embodiment can add an active indoor air replacement function, which can both extract odors from the source and quickly replace indoor air. In addition, a harmful gas detection sensor can be installed indoors to detect harmful gases such as inhaled sedatives, carbon monoxide, nitrogen dioxide, chlorine, formaldehyde, and phosphine. The exhaust fan can quickly exhaust harmful gases to prevent people from sending harmful gases into the room through sewers or sewage pipes, thus achieving the purpose of preventing harm.

[0065] In another embodiment, an infrared detection sensor is also installed at the entrance of the toilet, and the infrared detection sensor is electrically connected to the controller 9. When the infrared detection sensor detects that a user has entered the toilet, it sends a trigger signal to the controller 9. After receiving the trigger signal, the controller 9 starts the exhaust fan 6 and / or the exhaust fan 24 in advance to pre-deodorize and pre-ventilate the toilet before the user uses the toilet. When the infrared detection sensor detects that the user has left the toilet, the controller 9 controls the exhaust fan 6 and / or the exhaust fan 24 to run for a preset time and then automatically turn off to fully remove residual odors.

[0066] This system features an intelligent, proactive deodorization mode that automatically turns on when someone enters and delays shutting off when they leave, eliminating the need for manual operation and enhancing convenience and user experience. The system activates before the user enters, creating a negative pressure environment to ensure that any odors are immediately extracted, preventing their spread at the source. After the user leaves, the system continues to run for a period to thoroughly remove any remaining odors, keeping the bathroom air fresh. This avoids prolonged ineffective operation, reduces energy consumption, and extends the equipment's lifespan.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative pressure deodorization system for a bathroom, characterized in that, include: The main sewage pipe (1), toilet (2), washbasin (3), floor drain (4), exhaust pipe (5), and exhaust fan (6) are provided. The main sewage pipe (1) is set vertically and is connected to the main sewage pipe (7) buried under the floor. The sewage outlets of the toilet (2), washbasin (3), and floor drain (4) are connected to the main sewage pipe (7) through sewage branch pipes (8). One end of the exhaust pipe (5) is an air extraction end (51) that extends into the interior of the main sewage pipe (1), and the other end of the exhaust pipe (5) is an exhaust end (52) that extends to the outside of the building. The exhaust fan (6) is installed on the exhaust pipe (5) and located outside the main sewage pipe (1); A controller (9) is installed indoors and is electrically connected to the exhaust fan (6); When the exhaust fan (6) is running, a negative pressure is formed in the main sewage pipe (1) to draw the odor accumulated inside the main sewage pipe (1) into the exhaust pipe (5) through the exhaust end (51) and force it to be discharged to the outside through the exhaust end (52) to prevent the odor in the main sewage pipe (1) from flowing back into the bathroom through the toilet (2), the washbasin (3) or the floor drain (4).

2. The toilet negative pressure deodorization system according to claim 1, characterized in that, The main sewage pipe (1) is equipped with a one-way valve assembly at each pipe section corresponding to each floor. The one-way valve assembly includes two first one-way valves (10) arranged at intervals along the pipe axis. The conduction direction of the two first one-way valves (10) is set from top to bottom. Two of the first one-way valves (10) are used to form an airflow barrier in the main sewage pipe (1) section corresponding to the toilet on that floor, so as to prevent the odor between adjacent floors from flowing backward through the main sewage pipe (1).

3. The toilet negative pressure deodorization system according to claim 1, characterized in that, The air extraction end (51) is a tubular structure, and multiple air extraction holes (511) are opened on the pipe wall that extends into the main sewage pipe (1). A waterproof cover (11) is also fixedly installed on the outside of the air extraction end (51). The waterproof cover (11) is placed on the outside of the air extraction hole (511) to prevent sewage falling into the main sewage pipe (1) from splashing into or flowing into the air extraction hole (511) so as to keep the air passage inside the exhaust pipe (5) unobstructed.

4. The toilet negative pressure deodorization system according to claim 1, characterized in that, An odor detection sensor (12) is provided inside the exhaust pipe (5) near the suction end (51), and the odor detection sensor (12) is electrically connected to the controller (9).

5. A negative pressure deodorization system for a bathroom according to claim 1, characterized in that, A negative pressure detection sensor (13) is provided inside the exhaust pipe (5) near the suction end (51), and the negative pressure detection sensor (13) is electrically connected to the controller (9).

6. A negative pressure deodorization system for a bathroom according to claim 1, characterized in that, The toilet (2), the washbasin (3), and the floor drain (4) are all equipped with negative pressure air intake ports. Each negative pressure air intake port is connected to an air extraction branch pipe (14). Each air extraction branch pipe (14) is connected to the main air extraction pipe (15). The exhaust pipe (5) is connected to a branch pipe (53). The branch pipe (53) is connected to the main air extraction pipe (15). Each air extraction branch pipe (14) is equipped with a second one-way valve (16) that guides the exhaust from the negative pressure air intake port to the main air extraction pipe (15) to prevent odors from flowing between the toilet (2), the washbasin (3), and the floor drain (4).

7. A negative pressure deodorization system for a bathroom according to claim 6, characterized in that, The negative pressure suction port on the pipe of the floor drain (4) or on the odor-proof cover (41) of the floor drain (4) is connected to the suction branch pipe (14); the toilet (2) has a first suction chamber (2011) inside the seat (201) and / or toilet lid (202), and the first suction chamber (2011) has a plurality of first suction ports (20111) facing the toilet opening, and the negative pressure suction ports on the two first suction chambers (2011) are respectively connected to the suction branch pipe (14). Alternatively, a toilet air extraction ring (17) is installed on the seat ring (201) of the toilet (2). The toilet air extraction ring (17) has a second air extraction chamber (171) inside. The second air extraction chamber (171) has a plurality of second suction ports (1711) facing the toilet opening. The negative pressure suction port on the second air extraction chamber (171) is connected to the air extraction branch pipe (14). The washbasin (3) has a third suction chamber (31) inside the wash opening. The third suction chamber (31) has multiple third suction ports (311) facing the wash opening. The negative pressure suction port on the third suction chamber (31) is connected to the suction branch pipe (14). Alternatively, a washbasin suction ring (18) is installed on the washbasin (3), and the washbasin suction ring (18) has a fourth suction chamber (181) inside. The fourth suction chamber (181) has multiple fourth suction ports (1811) facing the washbasin opening. The negative pressure suction port on the fourth suction chamber (181) is connected to the suction branch pipe (14).

8. A negative pressure deodorization system for a bathroom according to claim 6, characterized in that, It also includes a urinal (19), the drain outlet of which is connected to the main sewage pipe (7) through a sewage branch pipe (8); The urinal (19) has a fifth suction chamber (191) inside, the fifth suction chamber (191) has a plurality of fifth suction ports (1911) facing the urinal opening, and the negative pressure suction port on the fifth suction chamber (191) is connected to the suction branch pipe (14). Alternatively, a urinal suction ring (20) is installed on the urinal (19), the urinal suction ring (20) has a sixth suction chamber (2001) inside, the sixth suction chamber (2001) has a plurality of sixth suction ports (20011) facing the urinal opening, and the negative pressure suction port on the sixth suction chamber (2001) is connected to the suction branch pipe (14).

9. A negative pressure deodorization system for a bathroom according to claim 6, characterized in that, It also includes a squat toilet (21), the drain outlet of which is connected to the main drain pipe (7) via a drain branch pipe (8); The squat toilet (21) has a seventh suction chamber (211) inside, the seventh suction chamber (211) has a plurality of seventh suction ports (2111) facing the defecation opening, and the negative pressure suction port on the seventh suction chamber (211) is connected to the suction branch pipe (14). Alternatively, the squat toilet (21) is hinged with a flip cover (22), the flip cover (22) has an eighth suction chamber (221) inside, the eighth suction chamber (221) has multiple eighth suction ports (2211) facing the defecation opening, and the negative pressure suction port on the eighth suction chamber (221) is connected to the suction branch pipe (14); Alternatively, the squat toilet (21) is equipped with a first foot pedal (23), the first foot pedal (23) has a ninth suction chamber (231) inside, the ninth suction chamber (231) has multiple ninth suction ports (2311) facing the defecation opening, and the negative pressure suction port on the ninth suction chamber (231) is connected to the suction branch pipe (14); Alternatively, the squat toilet (21) is hinged with a second foot pedal (27) and a cover plate (28). Both the second foot pedal (26) and the cover plate (27) are provided with a tenth suction chamber (271). The tenth suction chamber (271) has multiple tenth suction ports (2711) facing the defecation opening. The negative pressure suction ports on the two tenth suction chambers (271) are respectively connected to the suction branch pipe (14).

10. A toilet negative pressure deodorization system according to any one of claims 1-9, characterized in that, It also includes an exhaust fan (24) installed in the bathroom, the exhaust fan (24) being electrically connected to the controller (9), the exhaust pipe (25) of the exhaust fan (24) being directly discharged to the outside or connected to the exhaust pipe (5), and the exhaust pipe (25) being provided with a third one-way valve (26) that guides the exhaust fan (25) to the exhaust pipe (5) in a one-way direction.

Images