An exhaust backwash integrated system, toilet odor treatment method and system

Abstract

The present invention provides an integrated exhaust backwash system, a method and system for treating odor in a bathroom. The integrated exhaust backwash system includes a deodorization system and a flushing system. The deodorization system includes at least one deodorization channel and an exhaust channel. The flushing system includes a main flushing pipeline and a flushing connecting pipe connected to the main flushing pipeline. Each deodorization channel is provided with a first valve and a second valve. A flushing connecting pipe is connected between the first valve and the second valve. The other end of the flushing connecting pipe is connected to a position between the first valve and the second valve of another deodorization channel. All deodorization channels are connected in series through connecting pipes. The method and system for treating odor in a bathroom are based on the above-mentioned integrated exhaust backwash system. The present invention treats odors starting from the pollution source and completely eliminates pollution in the bathroom. In addition, the present invention is adaptable to bathroom areas with large exhaust volumes and high demand, and can avoid secondary pollution of the bathroom odor treatment system.

Description

Technical Field

[0001] The present disclosure relates to the field of toilet odor treatment, and in particular to an exhaust backwash integrated system, a toilet odor treatment method and a system. Background Art

[0002] Bathrooms are common places with air pollution in people's lives. People have proposed many solutions to how to effectively and quickly remove odors from bathrooms to keep the air fresh at all times.

[0003] The utility model patent document with patent number 201611143469.6 discloses a bathroom deodorization system that removes most of the accumulated water and removes the remaining moisture under the natural suction of the exhaust vent. Although this utility model patent document adopts the method of ensuring the dry state of the bottom of the tile to prevent the generation of odor, it does not consider how to deal with the odor around toilets, squat toilets, and urinals.

[0004] Utility model patent document No. 201920319847.4 discloses an intelligent bathroom deodorizer. A fan assembly is installed outside the air inlet to draw odors into the air inlet. A high-energy ion tube, a photocatalytic screen, an ultraviolet lamp, an ozone decomposition screen, and a low-temperature ion tube are sequentially positioned between the air inlet and the air outlet. The fan assembly, high-energy ion tube, ultraviolet lamp, and low-temperature ion tube are all electrically connected to a controller. This utility model patent document utilizes photocatalysis, ozone decomposition, ultraviolet lamps, and ion tubes for deodorization. While effective, this method is relatively costly.

[0005] In view of this, it is necessary to develop a low-cost odor treatment method and system for odor treatment around toilets, squat toilets, and urinals. Summary of the Invention

[0006] Embodiments of the present invention provide an integrated exhaust and backwash system, as well as a bathroom odor treatment method and system. These embodiments abandon the traditional "contaminate first, then treat" approach to bathroom odor removal, addressing odors at the source to completely eliminate bathroom contamination. Furthermore, the integrated exhaust and backwash system employed in these embodiments is adaptable to bathrooms with high exhaust volumes and demand, while also preventing secondary contamination of the bathroom odor treatment system.

[0007] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0008] In one aspect, an integrated exhaust backwash system is provided, comprising a deodorization system and a flushing system, wherein the deodorization system comprises M deodorization channels and an exhaust channel for collecting the foul gas in the M deodorization channels; and the flushing system comprises a flushing main pipeline and N sections of flushing connecting pipes connected to the flushing main pipeline.

[0009] Each flushing connecting pipe connects two adjacent deodorizing channels. The number of flushing connecting pipes N = the number of deodorizing channels M-1; N ≥ 2, M ≥ 1;

[0010] Each of the deodorizing channels is provided with a first valve and a second valve, a flushing connecting pipe is located between the first valve and the second valve, and a third valve is provided on the flushing main pipeline.

[0011] In practical applications, the third valve is preferably the main valve. When the exhaust backwash integrated system is applied to the bathroom, it is also called the bathroom two-way integrated exhaust system. The deodorizing exhaust part of the two-way integrated exhaust system is connected to the deodorizing exhaust channel. In addition, for the N flushing connecting pipes, each deodorizing channel is provided with a valve on the exhaust side (first valve) and a valve on the opposite side of the exhaust side (second valve). The flushing connecting pipe is connected between the first valve and the second valve, and the other end of the flushing connecting pipe is connected to the position between the first valve and the second valve of another deodorizing channel; all deodorizing channels are connected in series through the connecting pipe. The number of flushing connecting pipes N = the number of deodorizing channels M-1 (when M≥1). The above-mentioned bathroom two-way integrated exhaust system includes a deodorizing exhaust system and a bathroom exhaust system. The deodorizing exhaust system is used to extract the gas from the deodorizing system, and the bathroom exhaust system inherits the function of the traditional bathroom exhaust system and is used to extract the gas in the bathroom.

[0012] Based on one aspect, in a possible implementation, an air extraction port is installed at the air inlet end of each deodorizing channel, and each air extraction port is composed of X air extraction holes; X ≥ 3;

[0013] When the deodorization system is working, X odorous air flows drawn in from X air extraction holes converge in the deodorization channel, and M odorous air flows converge in the exhaust channel;

[0014] The odorous airflow after passing through the stop-return system in the exhaust channel cannot flow back to the deodorization channel.

[0015] Based on one aspect, in a possible implementation, the first valve is located below the second valve. When the first valve is closed and the second and third valves are opened, tap water flows through the flushing main pipe and the flushing connecting pipe to backwash the deodorization system upstream of the first valve.

[0016] When the first valve and the third valve are opened and the second valve is closed, the tap water flows through the flushing main pipeline and the flushing connecting pipe to backwash the deodorization system downstream of the second valve.

[0017] On the other hand, a method for treating odor in a bathroom, based on the above-mentioned integrated exhaust and backwashing system, comprises:

[0018] Determine the minimum exhaust volume of the deodorization system, with the third valve closed and the first and second valves open;

[0019] When the sensing personnel are close to the pollution source, the deodorization system is activated until all the polluted gas is extracted;

[0020] The first valve and the third valve are opened, and the second valve is closed. The tap water flows through the flushing main pipeline and the flushing connecting pipe to flush the deodorization system below the first valve and close to the pollution source.

[0021] In practical applications, the present invention's toilet odor treatment method offers two-way control over flushing activation, including manual flushing and automatic timed flushing. Automatic timed flushing requires the system to automatically activate only after three conditions are met: the system senses a person's departure, the scheduled flushing time has expired, and the system detects that the flushing is operational. When the flushing is automatically activated, the main flushing valve closes and the first and second valves open. Upon sensing a person's proximity to a pollution source, the deodorization system activates, extracting all contaminated air until the person leaves. After the person leaves, the deodorization system shuts down.

[0022] Restroom odor treatment methods include closing the main flush valve and opening the first and second valves. The deodorization system activates when it senses a person approaching a certain distance, completely extracting the odor until the person leaves for a certain period of time, at which point the system automatically deactivates. The deodorization system can also be manually activated to ensure that odors are fully removed from squat toilets, urinals, and toilets in public restrooms with frequent occupancy.

[0023] Based on another aspect, in a possible implementation, determining a minimum air flow rate of a deodorization system includes:

[0024] Establish a basic model of the microscopic operation of polluted gas and fresh air under convection;

[0025] The one-dimensional differential method is adopted, then extended to the two-dimensional differential method, and finally expanded to three-dimensional modeling to calculate the minimum exhaust volume of the modeled exhaust process.

[0026] In practical applications, the present invention determines the minimum exhaust volume of the deodorization system, and then designs a multi-stage start-up (more specifically, in order to improve the energy efficiency and functionality of the equipment operation, reduce noise pollution, and ensure comfort, the minimum exhaust volume of the deodorization system is determined, and then a multi-stage start-up with different exhaust volumes is designed. The design method of the minimum exhaust volume includes a practical method and a theoretical calculation method. The theoretical calculation method includes: first establishing a basic model of the microscopic operation of dirty gas and fresh air under convection state; then using one-dimensional differential method and two-dimensional differential method, and finally expanding to three-dimensional modeling to calculate the minimum exhaust volume of the modeled exhaust process; or performing three-dimensional modeling calculation in one step); that is, the determination of the minimum air volume of the present invention is mainly determined by theoretical calculation and practical simulation determination method.

[0027] Theoretical calculations serve as a reference for the final determination of minimum air volume. This method employs the following methods: 1. First, a basic model of the microscopic operation of convection between polluted and fresh air is established. Then, one-dimensional and two-dimensional differential methods are employed, ultimately expanding to three-dimensional modeling, to calculate the minimum air volume for the modeled exhaust process. 2. Three-dimensional modeling is performed directly on the exhaust port for analysis and theoretical calculations. This practical simulation method is then used to ultimately determine the minimum air volume.

[0028] Furthermore, when the flushing system of the present invention is activated, the main flushing valve connected to the tap water is opened, the valve on the exhaust air side (the first valve) is closed, and any one or more valves on the opposite side of the exhaust air (the second valve) are opened. At this time, flushing water flows in from the tap water end, flows through the flushing pipe, then flows through the deodorizing pipe, and is then discharged through the deodorizing pipe's air extraction hole, completing the flushing of the deodorizing system downstream of the second valve. If the second valve of one of the deodorizing pipes is opened and the other valves are closed, a separate flushing of that pipe can be achieved. The flushing system is provided with a manual switch for manual flushing.

[0029] Based on another aspect, in a possible implementation, closing the third valve and opening the first valve and the second valve include:

[0030] When the deodorization system is working, X odorous air flows drawn in from X exhaust holes converge in the deodorization channel, and M odorous air flows converge in the exhaust channel; the odorous air flows after flowing through the stop-return system in the exhaust channel cannot flow back to the deodorization channel.

[0031] In practical applications, the third valve of the present invention is also called the main flushing valve. When the main flushing valve is closed and the first valve and the second valve are opened, the following steps are implemented: when the deodorization system is working, 1 to X streams of polluted gas drawn in from 1 to X exhaust holes converge in the deodorization channel, and 1 to M streams of polluted gas converge in the exhaust channel; the exhaust channel is equipped with a check system at the exhaust port to prevent the polluted gas flow from flowing back to the deodorization channel.

[0032] In another aspect, a bathroom deodorization and exhaust system is provided, comprising: an exhaust system disposed above a pollution source, and an exhaust pipe for discharging odors in the exhaust system to the outside of the bathroom; the exhaust system is connected to an exhaust backwash integrated system;

[0033] The exhaust system extracts odors around the pollution source, and the bathroom is also provided with an exhaust system, which is located at the upper part of the bathroom;

[0034] A first air outlet and a second air outlet are provided on the wall of the toilet. The first air outlet is connected to the exhaust system through the exhaust pipe, and the second air outlet is connected to the exhaust system.

[0035] The bathroom deodorization and exhaust system of the present invention can be used as a two-way integrated exhaust system in practical applications. This system includes both a deodorization exhaust system and a bathroom exhaust system. Unlike traditional bathroom ceiling exhaust systems, the two-way integrated exhaust system of the present invention consists of two independent exhaust systems: a deodorization exhaust system and a bathroom indoor exhaust system.

[0036] The deodorizing exhaust system is connected to the bathroom exhaust system to remove contaminated air. The bathroom exhaust system inherits the functions of a traditional bathroom exhaust system, with one section connected to the bathroom's indoor air and another section connected to an exhaust duct on the bathroom ceiling or wall to extract air from the bathroom. Both exhaust systems in the integrated system are equipped with check valves to prevent the backflow of the two gases during extraction.

[0037] Furthermore, the deodorizing exhaust system's exhaust system primarily includes a check system; one end is connected to the deodorizing exhaust duct, and the other end is connected to the bathroom's existing exhaust duct, used to exhaust foul gases extracted by the deodorizing system's fan. The indoor check-return exhaust system also includes an exhaust fan and a check system. This exhaust system connects the bathroom's indoor air and the existing exhaust duct, discharging odors from the bathroom to an external exhaust duct. The deodorizing exhaust system and the bathroom's indoor check-return exhaust system can operate independently or in conjunction with each other. During the exhaust process, a reinforced check device is installed to prevent gas from flowing back.

[0038] Furthermore, the bathroom exhaust system includes an exhaust structure, an exhaust channel and a power component. The exhaust channel is connected to the exhaust duct, the exhaust structure is connected to the exhaust channel, and the power component is connected to the exhaust channel; the exhaust channel of the exhaust and flushing integrated system is connected to the exhaust system; the exhaust system includes an exhaust channel and a power component, and is connected to the original outdoor exhaust duct.

[0039] Based on yet another aspect, in a possible implementation, a non-return device is provided between the first air outlet and the second air outlet.

[0040] Based on another aspect, in a possible implementation, the exhaust system includes an exhaust structure, an exhaust channel, and a power component, the exhaust channel is connected to the exhaust pipe, the exhaust structure is connected to the exhaust channel, and the power component is connected to the exhaust channel; the exhaust channel of the exhaust backwash integrated system is the exhaust channel of the exhaust system;

[0041] The exhaust structure is located above the pollution source.

[0042] The present disclosure has at least the following technical effects or advantages:

[0043] This embodiment of the present invention abandons the traditional "pollution first, treatment later" approach to bathroom odor removal, addressing odors at the source to completely eliminate bathroom contamination. Furthermore, this embodiment utilizes an integrated exhaust and backwash system, which is adaptable to bathrooms with high exhaust volumes and demand, while also preventing secondary contamination of the bathroom odor treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A schematic diagram of an integrated exhaust backwash system according to some embodiments of the present disclosure;

[0046] Figure 2 A schematic diagram of toilet defecation and ventilation modeling provided according to some embodiments of the present disclosure;

[0047] Figure 3 This is a principle block diagram of a toilet odor treatment system provided according to some embodiments of the present disclosure;

[0048] Figure 4 A schematic diagram of a toilet odor treatment system according to some embodiments of the present disclosure;

[0049] Figure 5 Schematic diagram of a toilet odor treatment system based on a toilet according to some embodiments of the present disclosure Figure 1 ;

[0050] Figure 6 Schematic diagram of a toilet odor treatment system based on a toilet according to some embodiments of the present disclosure Figure 2 ;

[0051] Figure 7 A schematic diagram of the connection between an exhaust channel and a power component based on a toilet according to some embodiments of the present disclosure;

[0052] Figure 8 Schematic diagram of a toilet odor treatment system based on squat toilet according to some embodiments of the present disclosure Figure 1 ;

[0053] Figure 9 Schematic diagram of a toilet odor treatment system based on squat toilet according to some embodiments of the present disclosure Figure 2 ;

[0054] Figure 10 Schematic diagram of a urinal-based bathroom odor treatment system according to some embodiments of the present disclosure Figure 1 ;

[0055] Figure 11 Schematic diagram of a urinal-based bathroom odor treatment system according to some embodiments of the present disclosure Figure 2 ;

[0056] Figure 12 Schematic diagram of a urinal-based bathroom odor treatment system according to some embodiments of the present disclosure Figure 3 ;

[0057] Figure 13 Schematic diagram of a urinal-based bathroom odor treatment system according to some embodiments of the present disclosure Figure 4 ;

[0058] Figure 14 A flow chart of a method for treating toilet odor according to some embodiments of the present disclosure;

[0059] Figure 15 A diagram illustrating the microscopic mixing process of air and odor molecules provided in some embodiments of the present disclosure;

[0060] Figure 16 Schematic diagram of two mixing configurations of pollutants and air;

[0061] Figure 17 is the σ distribution diagram of odor molecules in the z direction;

[0062] Figure 18 This is a diagram of the size and structure of a squat toilet;

[0063] Figure 19 The law of gas movement is illustrated as a smooth curve tangent to both sides of the dead angle;

[0064] Figure 20 A diagram simulating the shape of a human body sitting on a toilet;

[0065] Figure 21 Schematic diagram of the fluid domain to be solved;

[0066] Figure 22 This is a diagram of the two-dimensional simulation working condition of the cavity pollution source distribution;

[0067] Figure 23 A two-dimensional numerical simulation structure schematic diagram was conducted for seven working conditions;

[0068] Figure 24 Schematic diagram of pollutant distribution function for seven working conditions;

[0069] Figure 25It is a diagram of the fitting results of linear fitting;

[0070] Figure 26 Set the icon for the three-dimensional coordinates;

[0071] Figure 27 FIG1 is a depth distribution curve of data line a;

[0072] Figure 28 Figure 2 is the depth distribution curve of data line a;

[0073] Reference numerals: 1000 - deodorization channel; 2000 - exhaust duct; 2100 - exhaust port; 2200 - exhaust port; 3000 - main flushing pipe; 4000 - flushing connecting pipe; 5000 - first valve; 6000 - second valve; 7000 - third valve; 8000 - exhaust check system; 8100 - axial flow fan; 8200 - hose; 8300 - spring; 8400 - check plate; 1 - exhaust structure; 11 - exhaust assembly; 111 - exhaust port ;112-suction hose;113-exhaust hole;2-exhaust channel;3-power part;4-check device;41-check valve plate;100-toilet;110-toilet lid;120-toilet ring;121-toilet inner ring;122-seat ring inner edge;123-fixed shaft;200-squatting toilet;210-new exhaust foot pedal inner edge;220-original squatting toilet foot pedal outer edge;230-new foot pedal inner edge;240-original foot pedal inner edge;300-urinal;310-exhaust cover. DETAILED DESCRIPTION

[0074] The present disclosure is described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present disclosure, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present disclosure.

[0075] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0076] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0077] The terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0078] This embodiment of the present invention addresses deodorization at the source of pollution in the bathroom, including toilets 100, urinals, and urinals 300. The key concept is to extract odors directly from these sources, then pipe them to exhaust vents and out of the bathroom. Specifically, exhaust covers are installed above toilets 100, squat toilets 200, and urinals 300. This is a key technical feature of this embodiment of the present invention.

[0079] For the toilet 100, this technology adds an exhaust port under the toilet 100 cover by modifying the toilet 100 cover to extract all the odors in the toilet 100;

[0080] For the squat toilet 200, the embodiment of the present invention adds an exhaust squat toilet foot pedal above the squat toilet 200 to completely extract the odor inside the squat toilet 200.

[0081] For the urinal 300, this embodiment of the present invention incorporates dedicated exhaust systems above, to the left, and to the right of the urinal 300 to remove all odors from the urinal. The exhaust systems above the toilet 100, squat toilet 200, and urinal 300 also function as flushing systems. Their primary function is to remove odors from the exhaust ducts.

[0082] The squat toilet 200 of this embodiment requires the addition of a new footrest with ventilation function to the existing footrest. Because squat toilets 200 are relatively dirty, the ventilation capacity and diameter of the multiple exhaust pipes need to be increased. The urinal 300 ventilation cover requires an additional ventilation cover above the urinal 300.

[0083] The gas extracted in the embodiment of the present invention is input into a dedicated two-way integrated exhaust fan through a pipe. The dedicated two-way integrated exhaust fan is equipped with two exhaust ports, one for exhausting the air in the bathroom and the other for exhausting the air at the pollution source. In order to prevent the two exhaust ports from smelling each other, the sealing and non-return systems of the two exhaust ports are specially reinforced.

[0084] See also Figures 1 to 14 , an embodiment of the present disclosure provides an integrated exhaust and flushing system, including a deodorization system and a flushing system, the deodorization system including M deodorization channels 1000, an exhaust channel 2 for collecting the foul gas in the M deodorization channels 1000, the flushing system including a main flushing pipeline 3000, and N sections of flushing connecting pipes 4000 connected to the main flushing pipeline 3000; an exhaust port 111 is installed at the air inlet end of each deodorization channel 1000, and each exhaust port 111 is composed of X exhaust holes 113; X ≥ 1; each section of the flushing connecting pipe 4000 connects two adjacent deodorization channels 1000, and the number N of the flushing connecting pipes 4000 is equal to the number M-1 of the deodorization channels 1000; M ≥ 1; each deodorization channel 1000 is provided with a first valve 6000 and a second valve 5000, the flushing connecting pipe 4000 is located between the first valve 6000 and the second valve 5000, and the main flushing pipeline 3000 is provided with a main flushing valve 7000.

[0085] Please continue reading Figures 1 to 13 Based on the above scheme, the exhaust system includes an exhaust structure 1, an exhaust channel 2 and a power part 3. The exhaust channel 2 is connected to the exhaust duct, the exhaust structure 1 is connected to the exhaust channel 2, and the power part 3 is connected to the exhaust channel 2; the exhaust channel 2 of the exhaust and flushing integrated system is the exhaust channel 2 of the exhaust system; the exhaust structure 1 is located above the pollution source.

[0086] Please continue reading Figures 1 to 13 The pollution sources include any one or more of the toilet 100, squat toilet 200, and urinal 300; the toilet 100, squat toilet 200, and urinal 300 are all provided with an exhaust structure 1 on the upper part. The exhaust structure 1 of the toilet 100 is located below the toilet 100 cover, the exhaust structure 1 of the squat toilet 200 is located above the squat toilet 200, and the exhaust structure 1 of the urinal 300 is located above, on the left, and on the right side of the urinal 300.

[0087] In the first embodiment, the bottom of the toilet seat 100 is provided with multiple exhaust assemblies 11, which form an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust channel 2 (also known as the exhaust duct 2000). There are multiple exhaust ports 111, each of which has multiple exhaust holes 113.

[0088] In the second embodiment, multiple sets of exhaust assemblies 11 are preferably disposed around the upper portion of the squat toilet 200, forming an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 (also referred to as an exhaust port 2100) and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust passage 2. Preferably, there are multiple exhaust ports 111, each of which has multiple exhaust holes 113.

[0089] In the third embodiment, multiple sets of exhaust assemblies 11 are preferably disposed around the top of the urinal 300, forming an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust passage 2. Preferably, there are multiple exhaust ports 111, each of which has multiple exhaust holes 113.

[0090] See also Figures 1 to 14 , an embodiment of the present disclosure provides a method for treating odor in a bathroom.

[0091] Based on the above-mentioned integrated exhaust flushing system, it includes: the flushing main valve 7000 is closed, the first valve 5000 and the second valve 6000 are opened; after the deodorization system, Figure 1 The axial flow fan starts to extract air. During deodorization, X streams of polluted gas drawn in through X exhaust holes 113 converge in deodorization duct 1000 and are then lifted upward into the exhaust duct. M streams of polluted gas converge in exhaust duct 2 and continue to be lifted into the exhaust system. The polluted gas is then discharged from the bathroom through the existing exhaust duct. After passing through exhaust duct 2 and stopping the return system, the polluted gas cannot flow back into deodorization duct 1000.

[0092] Based on the above solution, the deodorization system is designed to be activated both automatically and manually. During automatic activation, when a person approaches a fixed distance from the system, the deodorization system automatically senses the person, detects the person, switches the valve, and activates the axial flow fan within the system. After the person leaves, the axial flow fan automatically stops after a certain period of time. When the deodorization system switches to manual activation, the axial flow fan activates when it detects that the valve opening meets exhaust requirements.

[0093] Based on the above scheme, the deodorization system needs to determine the minimum exhaust volume to extract all the odorous gases, thereby establishing a multi-stage exhaust system. The determination of the minimum exhaust volume will lock the power level of the axial flow fan in the system and the power level of the channel pipe diameter to ensure the energy-saving operation of the system. At the same time, the minimum exhaust volume is determined to ensure that the noise of the deodorization system operation can be reduced to a minimum, and the comfort brought to the users by the exhaust process is maximized. The determination of the minimum exhaust volume includes experimental determination and theoretical calculation methods. Based on a large number of experiments, the following mathematical modeling analysis and calculation of the minimum exhaust volume are carried out for toilet defecation and squatting defecation, which are more sensitive to the exhaust volume. The significance of providing this calculation method is to illustrate the implementation method of this patent while confirming the feasibility of this patent in terms of low noise and comfort. For urinals that are less sensitive to exhaust volume, this patent only proposes a mathematical modeling algorithm based on a large number of experiments, without conducting in-depth calculations.

[0094] Based on the above scheme, mathematical modeling calculation 1: the minimum air extraction volume when the toilet is sitting:

[0095] Overall idea of ​​modeling:

[0096] The minimum airflow rate for toilet exhaust is both complex and crucial, primarily determined by the minimum airflow required when squatting. First, it must ensure that all fecal odors are completely removed, while second, ensuring comfort for the user. Excessive airflow can cause discomfort. Therefore, mathematical modeling based on practical experience is necessary to calculate the minimum airflow required to completely remove polluted gases.

[0097] Based on extensive experiments, the feasibility of the bathroom exhaust system was confirmed. This theoretical calculation differs from the traditional range hood exhaust volume. The exhaust area is essentially a semicircular radiation. This exhaust area is confined within the toilet bowl, and the multiple exhaust ports make mathematical modeling more complex, requiring the use of software.

[0098] Because the dynamics of air extraction are extremely complex, the project, based on extensive experimentation, developed mathematical modeling in a progressively more complex manner, extending the modeling from specific to general phenomena. Due to the lack of similar research and analysis in China, this modeling analysis employed a one-dimensional differential method, then expanded to a two-dimensional differential method, and finally to a three-dimensional modeling approach, targeting toilets of varying shapes and sizes. The numerical formulas and algorithms for the modeled extraction process were calculated.

[0099] One-dimensional basic modeling of the embodiment of the present invention: The molecules of bathroom odor are 3-methylindole and its derivatives in feces and ammonia in urine. According to research, when the concentration of 3-methylindole in the air is 0.75 mg / m 3 When the odor is detected, the mass fraction is 0.75 mg / m3 / (1000g / mg) / (1.29g / lm 3 )=1.75 / 1000 / 1.29=5.81*(10^-4), that is, when it reaches this mass fraction, the human body can feel the taste of 3-methylindole.

[0100] Given the complexity of air flow processes, the following modeling first establishes a basic model of the microscopic operation of polluted air and fresh air under convection. This serves as the foundation for mathematical modeling and analysis. To ensure the accuracy, effectiveness, and convenience of the modeling calculations, the following preconditions are proposed:

[0101] The overall modeling uses benzene, which diffuses faster, to replace 3-methylindole and ammonia. The diffusion coefficient of ammonia at 30°C is 1.98*10^(-5); the diffusion coefficient of benzene at 30°C is 2.88*10^(-5). While the laminar diffusion coefficient of 3-methylindole cannot be determined, the diffusing molecules of 3-methylindole are larger than those of benzene, and most of its derivatives diffuse in a semi-aggregated state, with a much slower diffusion rate than benzene. Therefore, the overall modeling process uses the faster diffusion rate of benzene to replace the diffusion coefficients of ammonia and 3-methylindole. This ensures that the contaminated gas is completely extracted. For minor uncertainties in the modeling process, the most conservative calculation method is used to ensure modeling validity. For example, under the extraction conditions described below, 3-trimethylindole is assumed to have a σ distribution.

[0102] The basic diffusion equation for infinitesimal modeling:

[0103] The pollutant mixing velocity is modeled as: Figure 15 , 15 is the micro-element mixing process of air and odor molecules at the microscopic level. The horizontal gray dotted line is the air in the room, and the horizontal gray dotted line is the odor molecules in the cavity. It is the direction of the air extraction process. During the air extraction process, the flow rate of air and pollutants is set to L is the one-dimensional length under the microelement method. The actual length of L is infinitesimal. This embodiment will calculate the speed of molecular diffusion and mixing (the following uses the mixed concentration of pollutants Y me to express) and the pumping speed correlation.

[0104] The component diffusion equation of the basic modeling microelement state is:

[0105]

[0106] In formula (1), Y me is the mass fraction of odor molecules:

[0107]

[0108] In formula (1) is the Hamiltonian operator, also known as the gradient operator:

[0109]

[0110] In formula (1) is the velocity vector, which is the sum of the velocity vectors in three directions:

[0111]

[0112] In formula (1) is the dot product of the Hamiltonian operator, Can only be used on vectors, also known as vector divergence:

[0113]

[0114] In formula (1), D me is the diffusion coefficient of the odor molecule, which is replaced by the diffusion coefficient of benzene.

[0115] The above modeling mainly deals with the convection-diffusion problem at the vertical interface. The components on the plane are calculated according to the σ distribution, and the diffusion between molecules cancels each other out. Therefore, Equation (1) can only retain the z-direction component perpendicular to the ground. By removing the x and y-direction components in Equation (1), a simplified one-dimensional component diffusion equation can be obtained:

[0116]

[0117] In the formula is the airflow velocity in the z direction; D me is the diffusion coefficient of odor molecules in the air, which can be taken as the diffusion coefficient of benzene 2.88e-5; is the gradient of the odor molecule mass fraction perpendicular to the diffusion interface; is the divergence of the odor molecule mass fraction perpendicular to the diffusion interface.

[0118] Modeling the one-dimensional distribution of odor molecules under vacuum conditions: where the pollutants and air mix, the above settlement results are as follows:

[0119]

[0120] In the formula and Since two of the two parameters are unknown, a mathematical model is performed on the one-dimensional distribution of the mass fraction of the odor molecules.

[0121] The boundary conditions for the one-dimensional distribution of odor molecule mass fraction are:

[0122] At infinity (z = +∞), Y me = 0. Odor molecule source (z = 0), Yme There is a maximum value.

[0123] Since the mathematical form of the σ distribution [3] is simple and satisfies both boundary conditions, we will discuss whether the σ distribution can be used to model the distribution of 3-methylindole under one-dimensional pumping conditions.

[0124] Two mixing modes of pollutants and air during extraction. Under extraction conditions, after mixing at the mixing interface and after mixing, pollutants and air can be separated into two mixing configurations based on their direction of movement: the first is the mixing of the two gases in opposite directions, as modeled at the interface. The second is the co-movement of the two gases toward the exhaust port. These two states coexist at the microelement angle.

[0125] like Figure 16 As shown, the left figure shows the Z-direction distribution of pollutants under actual natural diffusion, which is close to the σ distribution. The right figure shows the pollutant gas originally diffusing in the Z direction under the influence of the co-directional movement under the conditions of extraction. Because it diffuses earlier, it will be tilted in the direction of extraction, showing a distorted σ distribution. Without considering the swirl flow, this distortion will further move the pollutant distribution away from the area where the extraction is reversed. To simplify the model and calculations, this model ignores the distortion of the pollutant gas distribution caused by the co-directional extraction movement. This will result in more conservative calculation results and can better demonstrate the reliability of the extraction system.

[0126] One-dimensional distribution modeling calculation process:

[0127] The odor molecules are distributed in the z direction as σ. The expression of σ distribution is:

[0128]

[0129] Where Y z＝0 is the mass fraction of 3-methylindole at z = 0; σ is the coefficient of σ distribution, and the value of σ coefficient needs to be determined according to the specific situation. According to formula (7), the and

[0130]

[0131]

[0132] Substituting equations (8) and (9) into equation (6), we get The calculation results are:

[0133]

[0134] According to formula (10), the air flow velocity at the interface of the mixing element can be obtained.

[0135] Calculation ideas for modeling from two-dimensional distribution to three-dimensional distribution:

[0136] When using a toilet for urination, the pollution extraction model is similar to a semi-open model. However, when using a toilet for defecation, the pollution model is the most complex. During the extraction phase, a small amount of air flows from the front and rear ends of the toilet lid. The air and pollutants interact within the confined space, creating not only laminar flow but also swirl (large vortex) flow. Furthermore, during defecation, both exhaustion of all gases and comfortable ventilation must be considered; excessive airflow can cause discomfort.

[0137] The mathematical model of the toilet's exhaust system is extremely complex to create in 3D. The primary purpose of this modeling effort was to demonstrate the exhaust system's reliability, so rather than employing a single-step 3D simulation, we first performed a 2D simulation using representative regular shapes. Following the distribution patterns of the polluted air, we then used interpolation to expand the model to 3D. This approach offers the advantage of creating a unified aerodynamic model for each toilet space.

[0138] Before modeling, the following conditions are proposed. Condition 1: Although there is vortex inside the toilet, it basically exists in the form of laminar flow. The cause of the vortex is the friction of the toilet wall, which forms a layered deceleration of the gas at the wall, and finally forms a vortex under the drive of the fast gas. Although there is vortex, the vortex is a large vortex, and the microscopic state is still a laminar state. Condition 2: According to the law of air movement, for dead corners of different specifications, dead corners less than 30 degrees in the toilet are ignored in the modeling. It is considered that in the dead corner, the law of gas movement is a smooth curve tangent to both sides of the dead corner, such as Figure 19 Condition 3: Due to the variety of toilets on the market and their different internal shapes, this modeling uses a representative semi-ellipsoid to replace the internal space of all toilets. The two-dimensional centerline interface of the semi-ellipsoid is a semicircle of 0.3m*0.6m, simulating the shape of a human sitting on the toilet. The top of the semi-ellipsoid is covered with a flat surface, with air intake holes at the front and back sections and exhaust holes at the left and right ends. Figure 20 As shown. First, the semicircular shape facilitates calculations during the modeling process. Second, the 0.3m*0.6m hemispherical modeling has a larger upper surface area than existing toilets on the market, is deeper, and even slightly larger than European and American toilets in terms of water storage capacity. Calculations using this model are more likely to generate vortices than traditional toilets, and the exhaust air velocity is higher. Therefore, if this model is used properly, the traditional toilet will definitely be used properly.

[0139] Due to the complexity of gas distribution, this patent begins with microelement modeling, using software to perform two-dimensional numerical simulations. This is then derived through computational methods to achieve a three-dimensional model. In the two-dimensional modeling, the actual exhaust velocity of the exhaust holes is ignored. Based on the distribution of the toilet's air inlet and exhaust ports, the toilet can be cut into countless sections from front to back, with the air inlet located at each end and the exhaust hole in the center.

[0140] The distribution ratios of the air intake and exhaust holes on the cut surface and the toilet wall are consistent. According to aerodynamic models, the operating model of the pollutant source gas is highly similar to the midline cut surface; therefore, a two-dimensional numerical simulation was performed using the midline cut surface, with the exhaust holes placed in the center of the semicircle. In this two-dimensional state, the concentration distribution of the polluted gas is no longer based on the σ distribution. Instead, software is used to simulate the flow field (based on the calculation results, the distribution of the polluted gas is close to the σ distribution).

[0141] Three-dimensional simulation, based on the two-dimensional simulation, moves the position of the exhaust hole from the middle to both sides, and then conducts mathematical modeling to finally obtain the dynamic model of the dirty gas inside the space.

[0142] Two-dimensional distribution modeling calculation process:

[0143] The commercial software Fluent was used to perform a two-dimensional numerical simulation of the distribution of pollutants in the cavity. The method used in the numerical simulation was to solve the component transport equation of laminar flow in the fluid domain.

[0144] The fluid domain to be solved is Figure 21 As shown, the side wall area of ​​the cavity is approximated as a semicircle with a radius of 300 mm, the front and rear air inlets are 100 mm planes, the exhaust port is 20 mm planes, and the pollution source is 50 mm planes.

[0145] Since there is little research on the pollution source trimethylindole, its complete physical properties cannot be found. Therefore, the basic aromatic substance - benzene (C6H6) was selected as a substitute. The molecule of benzene is smaller than that of trimethylindole, so if the diffusion of benzene can be controlled, then the diffusion of trimethylindole machine derivatives and polymers will be more than enough. Figure 21 The two-dimensional simulation fluid domain shown is Figure 22 Numerical calculations of several working conditions in the table shown.

[0146] The mathematical model uses the time-averaged method to numerically solve the fluid domain by solving the NS equations and component transport equations in the fluid domain. The specific control equations are as follows:

[0147]

[0148]

[0149]

[0150] Formula (16) is the continuity equation, which is the mathematical description of the constant mass of the flow field. Formula (17) is the momentum conservation equation, where is the stress tensor, Represents the effect of gravity. Equation (18) is the energy equation, where E is the total energy, It means the sum of the enthalpy of all components. In the flow field solution, the temperature is calculated by solving the enthalpy equation. In the numerical calculation, the formula (18) is simulated using formula (19)

[0151] The stress tensor in

[0152]

[0153] In formula (19), μ is the molecular viscosity, I is the unit tensor, This term is a mathematical description of the volume expansion effect. Equations (16), (17), (18), and (19) constitute the governing equations of the basic flow field. The component transport equations calculate the distribution of component concentrations based on the velocity field obtained through this set of governing equations.

[0154]

[0155] In formula (20), Y ben is the concentration of benzene components, D ben is the laminar diffusion coefficient of benzene, D T,ben is the thermodynamic diffusion coefficient of benzene.

[0156] right Figure 22 The 7 working conditions shown in the figure were simulated in two dimensions, and the results were as follows: Figure 22 As shown in the figure, the flow field structure within the cavity is essentially the same at different inlet velocities. A pair of vortices forms on either side of the exhaust port, while a pair of smaller vortices is formed at the bottom of the cavity under the influence of the larger vortex. Since the depth of the inlet is too shallow, analysis is not very meaningful. Therefore, the calculation results for the seven operating conditions were used, taking the data at positions X = 0 mm and X = -150 mm, respectively, to quantitatively analyze the spatial distribution of benzene.

[0157] The system achieves maximum extraction efficiency at an inlet velocity of 0.3 m / s, where the concentration distribution is solely dependent on the concentration of the pollution source. Furthermore, pollutants are essentially completely extracted at a distance of 150 mm from the inlet plane, effectively preventing pollutants from escaping into the environment from the inlet.

[0158] The pollutant concentration distribution obtained by numerical calculation is basically consistent with the above-mentioned mathematical modeling prediction. Therefore, the data obtained by numerical calculation and the mathematical modeling method are used to fit a simple empirical formula for the distribution of pollutants in the cavity with height for design reference.

[0159] Since the drop rate at X = 0 is too fast and the mathematical fitting error is large, the pollutant concentration distribution at X = -150 mm is selected for mathematical fitting. According to the σ distribution shown in formula (7), the position where the pollutant concentration basically drops to 0 is defined as y = 3σ. According to the calculation results, we can get

[0160] y=3σ=0.18,σ=0.06m

[0161] Substituting the pollutant concentration at the lower wall into equation (7) yields the distribution function. Based on the above analysis, it can be seen that for this type of exhaust system, the inlet velocity only affects the near-wall pollutant concentration Y0 at X = -150 mm. To facilitate engineering design, we can establish a relationship with the inlet velocity based on the results of numerical calculations. By performing a linear fit on the inlet velocity and Y0 results for case 1-3, the fitting results are shown in Figure 2. Figure 25 shown.

[0162] Y0=-0.053U in +0.032 (16)

[0163] Therefore, based on the above, the pollutant concentration distribution at X = -150 mm is simplified to:

[0164] Y ben =(-0.053U in +0.032)exp(-y 2 / 0.0072) (17).

[0165] Three-dimensional distribution fitting modeling calculation process:

[0166] The fitting method includes: based on the simulation of the two-dimensional plane, selecting two representative data lines as the basis for data fitting, and inferring the three-dimensional distribution based on the two-dimensional data. Data lines a and b are selected to correspond to the exhaust positions directly in front of the cavity and to the side of the cavity, respectively. Since the distribution of pollutants in the cavity is symmetrical about the two center lines, the three-dimensional pollutant concentration distribution of the entire cavity can be inferred based on the concentration distribution of these two data lines. According to the dynamic model of the toilet section, the air inlet speed of the toilet lid is still maintained at around 0.3m / s, which is the optimal wind speed.

[0167] At the front position, due to the airflow restriction, the pollutant concentration is zero at a height of 0.2m. However, at the side exhaust position, due to the effect of the exhaust pipeline, the pollutant concentration at data line b still exists above the height of 0.2m. Due to the effect of exhaust and intake, the pollutant concentration distribution at the two positions is different. Equation (7) is used to fit the concentration distribution on data line a and data line b respectively. The fitting result of the concentration distribution on data line a is:

[0168] Y ben =Y0exp(-y 2 / 0.003) (18)

[0169] Fit the value of Y0 to obtain the relationship between Y0 and U in The relationship is:

[0170]

[0171] The fitting accuracy meets the project requirements. Therefore, the final fitting result of the concentration of data line a is:

[0172]

[0173] The concentration distribution fitting result on data line b is:

[0174] Y ben =0.2exp(-y 2 / 0.003) (21)

[0175] 3D interpolation:

[0176] Before constructing the three-dimensional interpolation method, the three-dimensional coordinate setting method is first specified. The cavity height direction is the y coordinate, the front-back direction is the x coordinate, and the left-right direction is the z coordinate. Figure 26 The red dotted lines in the figure represent data lines a and b, and the blue circle represents the position of the air extraction port in the positive direction of the z coordinate. Correspondingly, there is also an air extraction port in the negative direction of the z coordinate.

[0177] First, the pollutant concentration distribution function on data line a and data line b is set as:

[0178]

[0179] f b (y)=0.2exp(-y 2 / 0.003) (23)

[0180] Assuming the cavity has the same height and width, the absolute value of the x-coordinate on data line a is equal to the absolute value of the y-coordinate, and the absolute value of the z-coordinate on data line b is equal to the y-coordinate. Using the equal-height interpolation method, that is, for the pollutant concentration at a point P(x0, y0, z0), we first calculate the concentration of data line a and data line b at the same y-coordinate according to equations (27) and (28):

[0181] Y a (y o )=f a (y0) (24)

[0182] Y b (y o )=f b (y0) (25)

[0183] Next, perform weighted interpolation based on the distance between point P and points a and b on the xz section:

[0184]

[0185]

[0186]

[0187] Three-dimensional calculation results:

[0188] The toilet is in the sitting position. Figure 27 and Figure 28 According to the depth distribution curve of data line a, there is no benzene diffusion concentration at a height of 0.15mm above the center of line a. According to the semicircle of 0.3m*0.6m, the exhaust process of the vacuum toilet is simulated. Through qualitative and quantitative analysis, the following conclusions are drawn:

[0189] When a person sits on the device and air is drawn out, virtually no pollutants escape from the inlet. Although the extraction process generates a vortex, it is located near the midline between the air inlet and the pollution source, preventing contaminated air from escaping and causing pollution. Software simulations showed no contaminated air escape at an air velocity of 0.05 m / s.

[0190] According to the modeling equation, the optimal inlet air speed is 0.3m / s. This speed is imperceptible to the human body, ensuring comfortable ventilation. Simulations estimate that when a person sits on the toilet, the exposed air outlet is approximately 1dm. The optimal exhaust volume under this modeling is 3L / s.

[0191] It is set up in a semicircular manner, and its depth is greater than that of an actual toilet. However, the law of its air flow operation remains basically unchanged. The imported air suppresses the pollution source, and compared with an actual toilet, because it is relatively shallow, the dirty gas is less likely to form a vortex and will be directly drawn out. The air volume used is smaller than this.

[0192] The modeling calculations were based on the assumption that all pollutants were completely removed. Humans only perceive odors when the concentration of pollutants in the air reaches a mass fraction of 5.81*10^(-4). Therefore, through accurate modeling, we confirm that the implementation of the solution in this embodiment of the present invention is feasible.

[0193] Based on the above scheme, mathematical modeling calculation 2: modeling calculation under semi-open mode:

[0194] The theoretical simulation of air extraction in the semi-open process is mainly aimed at semi-open air extraction devices such as toilets, squat toilets, and urinals.

[0195] Since turbulence is essentially absent, the diffusion process is close to the σ distribution. It is assumed that under the air extraction model, the direction of the pollution diffusion velocity is still close to the σ distribution. Under the air extraction model, the diffusion distribution of pollutants is a distorted σ distribution along the air extraction direction. Near the air extraction holes, the actual distribution of pollutants is much larger than that under the model. Far from the air extraction holes, the distribution of pollutants is much smaller than that under the model.

[0196] The calculation using squat toilet as an example is as follows.

[0197] Aiming at the pollution of odor molecules, a semi-open pollution process model is established.

[0198] The dimensions of a squat toilet are 35cm long, 20cm wide, and 10cm high. The x-axis represents the length, the y-axis represents the height, and the width is ignored.

[0199]

[0200] Where D is the laminar diffusion coefficient of the pollutant. In this paper, the laminar diffusion coefficient of benzene is taken as 2.88e-5 as an approximation. σ is the coefficient of σ distribution. Based on the depth of the squat toilet being 4σ=0.1m, the value is taken as 0.025m.

[0201] According to the structural diagram, the estimated area of ​​the squat toilet is:

[0202] A=0.2×0.35=0.07m 2 (30)

[0203] The minimum required air flow rate can be calculated as:

[0204]

[0205] According to the fan setting position, it can extract >= 20% of the mixed gas, and the minimum extraction volume is 1.94g / s; converted into air volume, the minimum extraction volume = <1.5L / s.

[0206] The calculation is as follows using toilet urination as an example.

[0207] According to the theoretical calculation of the semi-open model, the mixed gas in the toilet is assumed to be distributed as σ, the distance from the bottom of the toilet pollution source to the toilet surface is 4σ (0.3m), σ = 0.3 / 4m, and the maximum surface area of ​​the toilet is 0.12m 2 ;

[0208] According to equation (32) Calculated v = 0.014 m / s = 1.4 cm / s

[0209] Pumping mass m=ρvA<=1.29*1.4*(10^-3)*0.12=2.16*(10^-4)kg / s;

[0210] Converted into volume V <= 0.28L / s; according to the layout of the toilet exhaust holes and the extraction power of 20% mixed dirty gas, the minimum exhaust volume under modeling is <= 1.4L / s.

[0211] See also Figures 1 to 13 Based on the above scheme, when the deodorization system is started, the main flushing valve is closed and the first valve and the second valve are opened, including: when the deodorization system is working, X odorous air flows drawn in from X exhaust holes converge in the deodorization channel, and M odorous air flows converge in the exhaust channel; the odorous air flow after flowing through the stop-return system in the exhaust channel cannot flow back to the deodorization channel.

[0212] The embodiment of the present disclosure also provides a two-way integrated exhaust system with the bathroom, please continue to refer to Figures 1 to 13 The two-way integrated exhaust system is equipped with a dedicated two-way integrated fan on the top (or wall) of the bathroom, which is connected to the exhaust pipe. It includes: the exhaust system of the deodorizing exhaust system, which is used to remove the gas from the pollution source; the exhaust system inside the bathroom, which is used to remove the gas inside the bathroom.

[0213] The deodorizing exhaust system's exhaust system includes an exhaust fan and a non-return system. The indoor non-return exhaust system also includes an exhaust fan and a non-return system. These exhaust systems connect the bathroom's indoor air to the exhaust duct, discharging odors from the bathroom to the external exhaust duct. The two exhaust systems can operate independently or in conjunction with each other. Independently reinforced non-return devices are installed during the exhaust process to prevent air from flowing back.

[0214] Please continue reading Figures 1 to 13Based on the above scheme, the exhaust system includes an exhaust structure 1, an exhaust channel 2 and a power part 3. The exhaust channel 2 is connected to the exhaust duct, the exhaust structure 1 is connected to the exhaust channel 2, and the power part 3 is connected to the exhaust channel 2; the exhaust channel 2 of the exhaust and flushing integrated system is the exhaust channel 2 of the exhaust system; the exhaust structure 1 is located above the pollution source.

[0215] Please continue reading Figures 1 to 13 The pollution sources include any one or more of the toilet 100, squat toilet 200, and urinal 300; the toilet 100, squat toilet 200, and urinal 300 are all provided with an exhaust structure 1 on the upper part. The exhaust structure 1 of the toilet 100 is located below the toilet 100 cover, the exhaust structure 1 of the squat toilet 200 is located above the squat toilet 200, and the exhaust structure 1 of the urinal 300 is located above, on the left, and on the right side of the urinal 300.

[0216] In the first embodiment, the bottom of the toilet seat 100 is provided with multiple exhaust assemblies 11, which form an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust channel 2 (also referred to as the exhaust duct 2000). There are one or more exhaust ports 111, each of which has one or more exhaust holes 113.

[0217] In the second embodiment, multiple sets of exhaust assemblies 11 are preferably disposed around the upper portion of the squat toilet 200, forming an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 (also referred to as an exhaust port 2100) and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust passage 2. There are preferably one or more exhaust ports 111, each of which has one or more exhaust holes 113.

[0218] In the third embodiment, multiple sets of exhaust assemblies 11 are preferably disposed around the top of the urinal 300, forming an exhaust structure 1. The exhaust assemblies 11 include an exhaust port 111 and an air suction hose 112. The exhaust port 111 is connected to the air suction hose 112, which is in communication with the exhaust passage 2. There are preferably one or more exhaust ports 111, each of which has one or more exhaust holes 113.

[0219] Please continue reading Figures 1 to 13 The exhaust cover of the present invention is located above the toilet bowl. An exhaust port is provided on the inner side of the cover, near the toilet bowl. Preferably, the exhaust system comprises a multi-pipe exhaust structure 1, with the exhaust port located on the seat of the toilet bowl 100. The multiple pipes extend horizontally or uphill from the exhaust port, ensuring that water can penetrate all parts of the pipes during flushing, ensuring a thorough flush.

[0220] The squat toilet 200 of this embodiment requires the addition of a new footrest with ventilation function to the existing footrest. Because squat toilets 200 are relatively dirty, the ventilation capacity and diameter of the multiple exhaust pipes need to be increased. The urinal 300 ventilation cover requires an additional ventilation cover above the urinal 300.

[0221] Please continue reading Figures 1 to 13 The integrated exhaust and flushing system of the present invention comprises an axial or centrifugal fan drive, an exhaust duct, and an exhaust check valve system. The integrated exhaust and flushing system is typically configured as a separate unit (or integrated with the exhaust unit or exhaust vent) and is located not far from a toilet 100 (or squat toilet 200, or urinal 300).

[0222] Furthermore, the traditional bathroom exhaust vent 2200 is typically a top exhaust fan. When the exhaust fan is turned on, it removes all foul odors from the bathroom. This embodiment of the present invention provides a bidirectional integrated exhaust fan, splitting the traditional bathroom exhaust fan into two parts, transforming the original single exhaust fan into a dual exhaust fan: one fan for traditional indoor air extraction, and the other for extracting contaminants from the toilet 100, squat toilet 200, and urinal 300.

[0223] The embodiment of the present invention abandons the traditional method of removing odor from the bathroom and adopts the "first pollute, then treat" method, starting from the source of pollution to treat odor and completely put an end to bathroom pollution. In addition, the embodiment of the present invention uses an integrated exhaust and flushing system, which can not only adapt to bathroom areas with large exhaust volumes and large demands, but also avoid secondary pollution of the bathroom odor treatment system. The series of detailed descriptions listed above are only specific descriptions of the feasible implementation methods of the present disclosure. They are not used to limit the scope of protection of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the scope of protection of the present disclosure.

[0224] It will be apparent to those skilled in the art that the present disclosure is not limited to the details of the exemplary embodiments described above and that the present disclosure can be implemented in other specific forms without departing from the spirit or essential characteristics of the present disclosure. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present disclosure is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present disclosure. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0225] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An integrated exhaust backwash system, characterized in that: It includes a deodorization system and a flushing system. The deodorization system includes M deodorization channels and an exhaust channel for collecting the dirty gas in the M deodorization channels. The flushing system includes a flushing main pipeline and N sections of flushing connecting pipes connected to the flushing main pipeline. Each flushing connecting pipe connects two adjacent deodorizing channels. The number of flushing connecting pipes N = the number of deodorizing channels M-1; N ≥ 1, M ≥ 2; Each of the deodorizing channels is provided with a first valve and a second valve, a flushing connecting pipe is located between the first valve and the second valve, and a third valve is provided on the flushing main pipeline; For N flushing connecting pipes, each deodorizing channel is provided with a first valve on the exhaust side and a second valve on the opposite side of the exhaust side. The flushing connecting pipe is connected between the first valve and the second valve. The other end of the flushing connecting pipe is connected to the position between the first valve and the second valve of another deodorizing channel. All the deodorizing channels are connected in series through the flushing connecting pipe. The first valve is located below the second valve. When the first valve is closed and the second and third valves are opened, tap water flows through the flushing main pipe and the flushing connecting pipe to backwash the deodorization system upstream of the first valve. When the first valve and the third valve are opened and the second valve is closed, the tap water flows through the flushing main pipeline and the flushing connecting pipe to backwash the deodorization system downstream of the second valve.

2. The exhaust backwash integrated system according to claim 1, characterized in that: An air extraction port is installed at the air inlet end of each deodorizing channel, and each air extraction port is composed of X air extraction holes; X ≥ 3; When the deodorization system is working, X odorous air flows drawn in from X air extraction holes converge in the deodorization channel, and M odorous air flows converge in the exhaust channel; The odorous airflow after flowing through the exhaust check system in the exhaust channel cannot flow back to the deodorization channel.

3. A method for treating odor in a bathroom, based on the exhaust backwash integrated system according to any one of claims 1-2, characterized in that: Toilet odor treatment methods include: Determine the minimum exhaust volume for the deodorization system, including: Establish a model of the microscopic operation of polluted gas and fresh air under convection; The minimum air volume of the modeled exhaust process is calculated by using the one-dimensional differential method, then extending it to the two-dimensional differential method, and finally expanding it to the three-dimensional modeling. The third valve is closed, and the first and second valves are opened; When the sensing personnel are close to the pollution source, the deodorization system is activated until all the polluted gas is extracted; The first valve and the third valve are opened, and the second valve is closed. The tap water flows through the flushing main pipe and the flushing connecting pipe. Backwash the deodorization system downstream of the second valve.

4. The method for treating bathroom odor according to claim 3, characterized in that: The third valve is closed, and the first and second valves are opened, comprising: When the deodorization system is working, X odorous air flows drawn in from X air extraction holes converge in the deodorization channel, and M odorous air flows converge in the exhaust channel; after flowing through the exhaust check system in the exhaust channel, the odorous air flow cannot flow back to the deodorization channel.

5. A bathroom deodorizing and exhaust system, based on the exhaust and backwashing integrated system according to any one of claims 1 to 2, comprising: An exhaust system installed above the pollution source and an exhaust pipe that discharges odor in the exhaust system to the outside of the toilet; The exhaust system is connected to the exhaust backwash integrated system; The exhaust system extracts odors around the pollution source, and the bathroom is also provided with an exhaust system, which is located at the upper part of the bathroom; A first air outlet and a second air outlet are provided on the wall of the toilet. The first air outlet is connected to the exhaust system through the exhaust pipe, and the second air outlet is connected to the exhaust system.

6. The bathroom deodorizing and exhaust system according to claim 5, characterized in that: A non-return device is provided between the first air outlet and the second air outlet.

7. The bathroom deodorizing and exhaust system according to claim 5, characterized in that: The exhaust system includes an exhaust structure, an exhaust channel and a power component. The exhaust channel is connected to the exhaust pipe, the exhaust structure is connected to the exhaust channel, and the power component is connected to the exhaust channel. The exhaust channel of the exhaust backwash integrated system is the exhaust channel of the exhaust system. The exhaust structure is located above the pollution source.

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