Odor-removing closestool with integrated split air duct structure

Abstract

The invention discloses an odor-removing closestool with an integrated split air duct structure, and relates to the technical field of bathroom accessories. Comprising a closestool body, an air duct assembly, an exhaust fan and an exhaust assembly. A mounting cavity is formed in the bottom in the closestool main body; the air duct assembly is arranged along the upper portion of the inner side wall of the basin container and provided with an integrally-formed annular air duct and a plurality of air suction openings formed in the circumferential direction, and the air suction openings are located above the flushing opening of the basin container. The exhaust fan is arranged on the front side of the mounting cavity, and an air inlet of the exhaust fan is connected with the annular air duct through a communicating cavity at the bottom of the air duct assembly. The exhaust assembly is arranged in the installation cavity, connected with the air outlet end of the exhaust fan and backwards penetrates out of the closestool body to be connected with an external exhaust system. According to the structure, all-directional interception and source suction of peculiar smell are achieved through the annular negative pressure collecting area, and the appearance integrity is kept through the hidden integrated layout. A peculiar smell sensor, a pressure sensor and a control module can be arranged, intelligent starting and stopping and power adjustment based on the using state and peculiar smell concentration are achieved, and the smell removing efficiency and the energy-saving effect are improved.

Description

Technical Field

[0001] This invention relates to the field of bathroom technology, and in particular to an odor-eliminating toilet with an integrated split-type air duct structure. Background Technology

[0002] Odors, especially from toilets, are a core issue affecting the hygiene and comfort of residential and public environments. These odorous gases primarily originate from the mixture of excrement and water, and their main components are volatile substances such as ammonia and hydrogen sulfide. If these odors are not eliminated promptly and effectively, they not only result in a poor user experience but can also breed bacteria and affect indoor air quality. Therefore, improving the odor-eliminating capabilities of toilets has become an important area of ​​continuous focus and innovation in the sanitary ware industry.

[0003] In the existing technology, various technical solutions have been proposed to solve the problem of toilet odor, which can be mainly summarized into the following categories: The first type of solution focuses on physical masking or chemical neutralization, such as adding fragrances or deodorizers to the toilet tank or accessories. This type of method is a passive treatment and cannot eliminate the odor at its source; it can only mask the smell, and the effect is short-lived, requiring frequent replacement of consumables. The user experience and maintenance costs are both unsatisfactory.

[0004] The second type of solution employs active ventilation technology, which involves connecting an external ventilation device to the toilet structure. A common practice is to install an air intake at the rear of the toilet and connect it to a fan to extract air from inside the toilet bowl. While this method achieves active odor removal, it still has significant drawbacks in practical application. First, most designs use a single air intake, which has a limited suction range and easily creates airflow dead zones within the toilet bowl. This means that odors released from the edges of the bowl or locations far from the air intake cannot be effectively captured in a timely manner, resulting in uneven odor removal efficiency. Second, some designs do not fully consider the natural upward diffusion characteristics of odor gases, and the air intake placement is not entirely reasonable. This fails to achieve "early interception" of the odor source, causing the odor to diffuse and dilute within a large space of the bowl before being extracted, reducing processing efficiency and increasing fan load and energy consumption. Furthermore, some integrated ventilation systems have complex structures and poor integration with the toilet body, posing a risk of air leakage. Their external or spliced ​​installation methods may also compromise the overall integrity and aesthetics of the toilet's appearance. In addition, their structure may pose a risk of liquid splashing into the ventilation system during flushing. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an odor-eliminating toilet with an integrated split-type air duct structure to solve or improve the technical problems existing in the prior art.

[0006] The technical solution of this invention is implemented as follows: an odor-eliminating toilet with an integrated split-type air duct structure, comprising: The toilet body has an integrated mounting chamber at its bottom. The air duct assembly is arranged along the upper part of the inner wall of the toilet body basin, and its air intake is located in the area above the flushing port of the toilet body basin along the direction of gravity, for collecting and guiding odor gases generated inside the toilet. An exhaust fan is installed in the front area inside the installation chamber. Its air inlet is connected to the bottom of the air duct assembly to generate suction power, continuously extracting and pressurizing the odor gas collected by the air duct assembly for output. An exhaust assembly is disposed in the mounting chamber, with its air inlet connected to the air outlet of the exhaust fan, and its air outlet extending outward from the mounting chamber and exiting to the outside of the toilet body, for the purpose of directionally discharging the gas treated by the exhaust fan into the atmospheric environment outside the toilet.

[0007] As an improvement, the air duct assembly includes: The annular air duct has a hollow circular cross-section and is integrally formed on the upper part of the inner wall of the toilet bowl. Multiple air intakes are provided and are arranged circumferentially along the inner sidewall of the annular air duct. The toilet body has a hollow cavity formed below the annular air duct. The top of the hollow cavity is connected to the bottom of the annular air duct, and the air inlet of the exhaust fan is connected to the corresponding part of the hollow cavity.

[0008] As an improvement, the annular air duct sidewall through which the air inlet penetrates is inclined downward toward the central axis of the basin, and the angle between the sidewall and the horizontal plane is 15° to 60°.

[0009] As an improvement, the exhaust fan is vertically fixed to the bottom wall of the mounting chamber with its rotating shaft.

[0010] As an improvement, the exhaust assembly includes: A connecting pipe is installed in the installation chamber, with its air inlet end sealed and connected to the air outlet end of the exhaust fan. Its pipe body extends backward from the exhaust fan and penetrates the rear side wall of the toilet body, so that the air outlet end of the connecting pipe is located outside the toilet body. The exhaust duct has one end detachably and sealed to the air outlet of the connecting pipe located outside the toilet body, and the other end is used to connect to the external exhaust system.

[0011] As an improvement, the exhaust fan is a centrifugal fan or a crossflow fan.

[0012] As an improvement, it also includes: An odor sensor, whose detection end is set at the air intake on the toilet body, is used to detect gas parameters that characterize odors and generate corresponding detection signals; Two pressure sensors are provided, which are symmetrically arranged on both sides of the bottom of the toilet seat to detect the user's usage status and generate corresponding pressure signals. The control module is electrically connected to the odor sensor, the pressure sensor, and the exhaust fan, respectively. The control module is configured to: receive the pressure signal from the pressure sensor and determine whether someone is using the device based on the pressure signal; when it is determined that someone is using the device, receive the detection signal from the odor sensor and compare the detection signal with a preset threshold, and control the start, stop, and operating power of the exhaust fan based on the comparison result.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a surrounding negative pressure collection zone by integrally forming an annular air duct on the upper inner wall of the toilet bowl and arranging multiple air inlets along its circumference. This design ensures that odors, regardless of where they originate or diffuse around the circumference of the bowl, can be effectively captured by the nearest air inlet, eliminating airflow dead zones and collection blind spots present in traditional single-air-inlet solutions, and achieving all-round, dead-angle-free interception and collection of odors.

[0014] This invention positions the air intake above the water inlet of the basin inlet in the direction of gravity, with its opening angled downwards towards the central axis of the basin. This arrangement directs the air intake directly onto the natural diffusion path of odorous gases (which rise when heated), enabling active interception and extraction of odors in their initial stage after leaving the water surface and beginning to diffuse upwards, thus achieving early control of the odor source. This avoids the odor from fully diluting and dispersing within the large space of the basin before being treated, significantly improving the odor removal response speed and processing efficiency. Furthermore, because the direction of the suction airflow is aligned with the natural convection direction, it reduces the fan's operating resistance, thereby reducing the fan load and energy consumption.

[0015] The air duct assembly of this invention is integrally molded with the toilet body, greatly improving structural strength and sealing, avoiding the risks of air leakage and water seepage that may occur due to splicing and bonding, and ensuring the long-term reliable operation of the airflow channel. Meanwhile, the exhaust fan, ventilation assembly, and other power and exhaust components are all integrated and concealed within the mounting chamber at the bottom of the toilet body, and extend rearward through a built-in connecting pipe to connect to the external ventilation system. This highly integrated split-type air duct design achieves complete odor removal while maintaining the overall integrity and aesthetics of the toilet's appearance to the greatest extent possible, with no exposed or protruding parts.

[0016] This invention constructs an intelligent sensing and control system by using a pressure sensor located at the bottom of the seat ring and an odor sensor located at the air intake, linked with a control module and an exhaust fan. This system can automatically and accurately determine the usage status (occupied / unoccupied) and real-time odor concentration, and intelligently control the start / stop and operating power of the fan accordingly. It achieves a refined control logic of "efficient operation only when someone is using the product and an odor is generated, and automatic standby when no one is present or there is no odor," ensuring optimal odor removal while avoiding unnecessary energy waste, reducing operating noise, and improving the product's intelligence and user experience.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a side view of the structure of the present invention. Figure 4 for Figure 3 Sectional view at point AA.

[0020] Figure label: 1. Toilet body; 11. Installation chamber; 12. Flushing outlet; 2. Air duct assembly; 21. Air intake; 22. Annular air duct; 23. Hollow cavity; 3. Exhaust fan; 4. Exhaust assembly; 41. Connecting pipe; 42. Exhaust duct; 5. Odor sensor; 6. Pressure sensor. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0022] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features. In this invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding 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 based on the accompanying drawings and specific circumstances.

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] This invention provides an odor-eliminating toilet with an integrated split-duct structure, which can be referred to as [reference needed]. Figure 1 and Figure 4 The toilet includes: a toilet body 1, a ventilation duct assembly 2, an exhaust fan 3, and a ventilation assembly 4. The toilet body 1 is existing technology and provides its functional use. An integrated installation chamber 11 is formed at the bottom of the toilet body 1 to accommodate toilet accessories, the ventilation duct assembly 2, and the exhaust fan 3, providing a concealed, compact, and protected installation space, avoiding exposure of components, ensuring the overall appearance, and utilizing the structure of the toilet body 1 for support and fixation.

[0025] The air duct assembly 2 is arranged along the upper part of the inner wall of the toilet bowl 1. Its air intake 21 is located above the flush outlet 12 of the toilet bowl 1 in the direction of gravity, and is used to collect and guide odor gases generated inside the toilet. The air intake 21 is the inlet for odor gases to enter the air duct assembly 2. Located above the flush outlet 12 in the direction of gravity, it can effectively capture odors that evaporate and diffuse above the water surface. At the same time, the air duct assembly 2, as an odor collection channel, is arranged along the inner wall of the toilet bowl 1, ensuring that odor gases escaping from any location around the bowl can be captured and guided nearby, avoiding collection dead zones.

[0026] The exhaust fan 3 is located in the front area inside the installation chamber 11. Its air inlet is connected to the bottom of the air duct assembly 2 to generate suction power, continuously extracting and pressurizing the odor gas collected by the air duct assembly 2. The exhaust fan 3, as a power source, generates a stable negative pressure (suction force), continuously extracting the gas mixture (air and odor) inside the toilet bowl 1 through the air duct assembly 2, and pressurizing the extracted gas to overcome the resistance of the exhaust path and ensure that the gas can be forcibly discharged to the outside of the toilet.

[0027] The exhaust assembly 4 is installed inside the installation chamber 11. Its air inlet is connected to the air outlet of the exhaust fan 3, and its air outlet extends outward from the installation chamber 11 and exits to the outside of the toilet body 1. It is used to directionally discharge the gas treated by the exhaust fan 3 into the atmospheric environment outside the toilet. The exhaust assembly 4 forms a closed exhaust channel from the exhaust fan 3 to the external environment, realizing the directional and long-distance discharge of odor gases and avoiding circulation inside the toilet.

[0028] As one implementation method of this embodiment, please refer to Figure 1 and Figure 4 The air duct assembly 2 includes an annular air duct 22 and air inlets 21. The annular air duct 22 has a hollow circular cross-section and is integrally formed on the upper part of the inner wall of the toilet bowl 1. Specifically, the annular air duct 22 is integrally formed with the toilet bowl 1, giving it extremely high structural strength and sealing performance, avoiding air leakage, detachment, or water seepage problems that may occur due to bonding or assembly. At the same time, as part of the bowl structure, it does not occupy additional space and maintains the smoothness of the bowl's inner wall. In implementation, the annular air duct 22 forms a continuous air collection chamber, used to collect odor gases entering from each air inlet 21 and guide the gas flow within it. When connected to the exhaust fan 3, a relatively uniform negative pressure (suction force) field can be formed inside the annular air duct 22, providing a stable suction power foundation for the circumferentially arranged air inlets 21.

[0029] Multiple air intakes 21 are arranged circumferentially along the inner wall of the annular air duct 22. These intakes serve as the inlets for odorous gases to enter the annular air duct 22 from the toilet bowl cavity. Their circumferential layout ensures that regardless of where the odor originates or diffuses around the bowl, it can be captured by the nearest intake, eliminating blind spots and improving collection efficiency. In practice, the intakes 21 are located above the flush outlet 12 of the toilet bowl 1, along the direction of gravity. Odorous gases (such as ammonia and hydrogen sulfide) are mainly released from the surface of the water where excrement and water mix. By positioning the intakes 21 above the flush outlet 12 in the direction of gravity, they are directly aligned with the natural upward diffusion path of the odorous gases. This allows for interception and capture of the odors in their initial stage of rising and diffusing after leaving the water surface, achieving source control and preventing the odors from fully diffusing and mixing within the larger space of the bowl before being diluted and extracted, thus significantly improving odor removal efficiency.

[0030] Meanwhile, the density of hot and humid odorous gases is low, and they will rise naturally after being generated. The air intake vent 21, located above the flushing inlet 12, is in the path of this natural rising airflow, which makes the direction of active suction and natural convection tend to be consistent, reducing the natural resistance that the extracted airflow needs to overcome, thereby achieving more energy-efficient and more effective suction.

[0031] Furthermore, the flushing inlet 12 is the area within the basin where water flow is most intense and droplet splashing is most frequent. By positioning the air intake 21 at the top, utilizing the direction of gravity, the air intake 21 avoids the direct impact of the main jet of water and most of the splashes during rinsing. This greatly reduces the risk of rinsing water, dirt, or cleaning agent liquid being directly sucked into the air duct assembly 2, protecting the cleanliness of the internal air duct and exhaust fan 3, extending their lifespan, and reducing maintenance requirements.

[0032] The toilet body 1 has a hollow cavity 23 formed below the annular air duct 22. The top of the hollow cavity 23 is connected to the bottom of the annular air duct 22, and the air inlet of the exhaust fan 3 is connected to the corresponding part of the hollow cavity 23. The hollow cavity 23 serves as a transition structure connecting the upper annular air duct 22 and the lower exhaust fan 3, guiding the gas collected circumferentially by the annular air duct 22 downwards and concentrating it to the air inlet of the exhaust fan 3. At the same time, its hollow structure provides a certain buffer volume, which helps to smooth out the slight pulsations or imbalances caused by the airflow from the multiple air inlets 21 of the annular air duct 22, making the airflow entering the air inlet of the exhaust fan 3 more stable, which is beneficial to the stable operation of the exhaust fan 3 and reduces noise.

[0033] In practical implementation, when the exhaust fan 3 is started, it generates a continuous suction force (negative pressure) at its air inlet. This negative pressure is transmitted upward through the hollow cavity 23 directly connected to it. The negative pressure quickly fills the hollow cavity 23 and is further transmitted upward to the annular air duct 22 connected to it. Since the annular air duct 22 is a continuous closed-loop pipe, the negative pressure is established within the annular cavity, forming a relatively uniform low-pressure area (negative pressure field) surrounding the upper part of the bowl. A pressure difference is thus generated between the inner and outer sides of each air inlet 21 on the inner wall of the annular air duct 22. Driven by the pressure difference, the gas inside the bowl of the toilet body 1 (normal atmospheric pressure) automatically flows at high speed through the air inlet 21 into the low-pressure annular air duct 22. At this time, odor gas is drawn in along with the air. The gas entering from each air inlet 21 mixes within the annular air duct 22 and flows and converges along the annular channel 22. Under the continuous suction of the exhaust fan 3, all the collected gas is guided to the connection between the annular air duct 22 and the hollow cavity 23, and then enters the hollow cavity 23, and is finally sucked up by the exhaust fan 3.

[0034] As one implementation method of this embodiment, please refer to Figure 4 The sidewall of the annular duct 22 through which the air intake 21 passes is inclined downwards toward the central axis of the basin, with the angle between the sidewall and the horizontal plane being 15° to 60°. The downwardly inclined sidewall of the annular duct 22 determines the axial direction of the air intake 21, guiding the airflow entering the annular duct 22 to generate a vector component toward the center. This helps to create a flow field tendency that converges toward the center and draws downwards in the space above the basin, promoting the circulation and renewal of air inside the basin, avoiding airflow dead zones at the corners or edges of the basin, thereby achieving more comprehensive air replacement. Specifically, after odorous gases (such as ammonia and hydrogen sulfide) evaporate from the water surface, they rise first due to thermal convection. The air intake 21, formed by the inclined sidewall and pointing toward the central axis, has its axial direction directly aligned with the path of the diffused airflow, enabling it to more directly and actively intercept and capture the diffusing odor cloud, improving initial capture efficiency.

[0035] Specifically, to achieve better airflow guidance and structural transition, the inclined sidewall of the annular air duct 22 through which the air intake 21 penetrates is not a single inclined surface structure. (See reference...) Figure 4The sidewall structure, from top to bottom, includes: a vertical connecting section that smoothly transitions to the upper end of the inclined sidewall of the annular air duct 22; and a connecting section that smoothly transitions to the lower end of the inclined sidewall of the annular air duct 22, slightly inclined towards the central axis of the basin. The two sections connect to form a V-shaped transition structure with a large angle. This connecting section smoothly connects to the outline of the basin above the flushing outlet 12. The vertical connecting section at the upper end ensures smooth airflow; the inclined sidewall in the middle controls the axial direction of the suction airflow, achieving active interception of rising odors; and the lower connecting section, with its large inward inclination angle, forms a V-shaped structure, which can effectively guide any small amount of liquid droplets that may splash back along the wall to the basin, preventing liquid from being sucked into the air duct; at the same time, it can transition to the flushing outlet area, making the air intake 21 closer to the source of odors in space, and ensuring the overall smoothness of the inner wall of the basin, without protrusions, making it easy to clean.

[0036] As one implementation method of this embodiment, please refer to Figures 2-4 The exhaust fan 3 is vertically fixed to the bottom wall of the installation chamber 11 with its rotating shaft. As the power load for the toilet, the exhaust fan 3 is rigidly connected to the bottom wall to ensure its operational stability. At this point, the bottom wall bears the entire weight and operating load of the fan 3. Through the mechanical structure and installation posture of the exhaust fan 3 itself, a seamless and low-loss conversion of airflow from vertical to horizontal is achieved, realizing the concealed, rearward direct exhaust configuration of the exhaust assembly 4.

[0037] Specifically, the exhaust fan 3 is either a centrifugal fan or a crossflow fan. In a centrifugal fan, gas is drawn in axially, gains extremely high kinetic energy under centrifugal force, and is discharged under high pressure from the radial outlet of the volute. In this embodiment, it is suitable for scenarios requiring overcoming the resistance of long exhaust ducts, providing strong static pressure to ensure that odorous gases are transported a sufficient distance. A crossflow fan, on the other hand, has airflow flowing across a slender cylindrical impeller, resulting in a smooth, uniform, and wide exhaust airflow. In this embodiment, it offers lower operating noise and a more compact axial dimension while providing sufficient air pressure, making it suitable for situations with higher noise reduction requirements or where the axial height of the installation space is particularly limited.

[0038] As a further optimization of this embodiment, the exhaust fan 3 adopts a modular structure with a highly integrated motor and fan impeller. Specifically, the motor and centrifugal or cross-flow impeller are encapsulated together in a compact, well-sealed housing, forming an independent power module unit. The sealed housing provides a physical barrier for the internal motor and electrical components, effectively isolating moisture, splashing water, or accidental liquid intrusion from inside the toilet, reducing the risk of motor short circuits, corrosion, or foreign object jamming, thereby significantly improving the long-term operational reliability and service life of the core power unit in humid environments. Simultaneously, because the motor and fan impeller are manufactured and installed as an integrated unit, their internal dynamic balance is superior. Furthermore, the overall module is rigidly connected to the bottom wall of the mounting chamber 11 through its housing, reducing the cumulative assembly errors and loosening that may exist in traditional separate assemblies. This effectively suppresses and absorbs vibrations generated during operation, preventing vibrations from being transmitted to the toilet body 1 and causing resonance noise, resulting in a quieter and smoother operating experience. Furthermore, the exhaust fan module is connected to the hollow cavity 23 of the duct assembly and the connecting pipe 41 of the exhaust assembly 4 via standard interfaces (such as flanges, clips, or quick connectors). When maintenance or replacement is required, there is no need to disassemble other complex components; simply disconnecting the electrical and piping connections allows the entire power module to be removed from the mounting chamber 11 for quick replacement. This design greatly simplifies the subsequent maintenance process and reduces maintenance costs and time.

[0039] As one implementation method of this embodiment, please refer to Figures 2-3 The exhaust assembly 4 includes a connecting pipe 41 and an exhaust pipe 42. The connecting pipe 41 is located in the installation chamber 11, and its air inlet end is sealed and connected to the air outlet end of the exhaust fan 3. Its pipe body extends backward from the exhaust fan 3 and passes through the rear side wall of the toilet body 1, so that the air outlet end of the connecting pipe 41 is located outside the toilet body 1. The connecting pipe 41 serves as a rigid guide and transition channel, guiding the high-pressure gas generated by the exhaust fan 3 from the internal power source to the external interface without leakage or change of direction loss.

[0040] One end of the exhaust duct 42 is detachably and sealed to the outlet end of the connecting pipe 41 located outside the toilet body 1, and the other end is used to connect to the external exhaust system. As an extension of the exhaust path, the exhaust duct 42 is used to extend the exhaust distance and adapt to diverse on-site installation environments to ensure that odorous gases extracted from inside the toilet can be sealed and transported to a designated exhaust point far away from the bathroom living space.

[0041] As one implementation method of this embodiment, please refer to Figure 1 and Figure 4It also includes an odor sensor 5, a pressure sensor 6, and a control module. The odor sensor 5 has its detection end located at the air intake 21 on the toilet body 1, used to detect gas parameters characterizing odors and generate corresponding detection signals. The odor sensor 5 body (including the circuitry) is embedded in the toilet body 1, and its detection end is located at the air intake 21 on the toilet body (1), allowing it to directly sense the gas composition about to be drawn into the annular air duct 22. The detection result is closest to the actual situation of odor generation, avoiding delays and errors caused by downstream airflow detection. Specifically, the odor sensor 5, as a gas-sensitive element, can convert specific gas chemical parameters (such as the concentration of specific volatile organic compounds VOCs, ammonia, hydrogen sulfide, etc.) into measurable electrical signals.

[0042] Two pressure sensors 6 are symmetrically positioned on either side of the bottom of the toilet seat 1 to detect the user's usage status and generate corresponding pressure signals. Specifically, the pressure sensors 6 determine whether someone is using the toilet by detecting whether the seat is under balanced pressure from both sides. The symmetrical arrangement of the two pressure sensors 6 avoids misjudgments due to single-point failure or the user sitting on one side, improving the reliability of the detection. It also effectively distinguishes between human body weight and accidentally placed objects, improving the accuracy of the detection. In implementation, the pressure sensors 6 are thin-film or strain gauge sensors, and the pressure signal they generate is the primary condition for the logic judgment of the control module.

[0043] The control module is electrically connected to the odor sensor 5, pressure sensor 6, and exhaust fan 3. The control module integrates an electronic control unit with a microprocessor, signal processing circuit, storage unit, and drive circuit, and is electrically connected to the odor sensor 5, pressure sensor 6, and exhaust fan 3 via wires. The control module is responsible for receiving and processing all sensor signals and executing the embedded preset control logic. Based on the established program algorithm, it judges the input signals and generates corresponding control commands to output to the exhaust fan 3.

[0044] The control module is configured to: receive the pressure signal from the pressure sensor 6 and determine whether someone is using the device based on the pressure signal; when it is determined that someone is using the device, receive the detection signal from the odor sensor 5 and compare the detection signal with a preset threshold, and control the start, stop and operating power of the exhaust fan 3 based on the comparison result.

[0045] During implementation: Level 1 judgment: Status monitoring is used (implemented by pressure sensor 6 and control module). Normal state: When no one is sitting on the toilet, the signals from both pressure sensors 6 are below the threshold, and the control module determines that the toilet is in "unused" status. At this time, regardless of the reading of the odor sensor 5, the control module keeps the exhaust fan 3 off by default, and the toilet is in a standby monitoring mode with the lowest power consumption.

[0046] Trigger: When the user sits down, the pressure sensors 6 on both sides detect and upload a continuous, stable pressure signal. After logical judgment, the control module confirms that the toilet is in valid use. At this time, the toilet enters the "ready to respond to odors" activation mode.

[0047] Second-level judgment: Odor concentration detection and response (implemented by odor sensor 5 and control module) After the system is activated, the control module begins to read the detection signal of the odor sensor 5 located at the air intake 21 in real time or periodically.

[0048] Threshold comparison: The control module stores one or more preset odor concentration thresholds and compares the real-time detection signal with these thresholds.

[0049] Decision-making and output: If the detection signal is below the threshold, it indicates that the current air quality is acceptable and the odor has not reached a level requiring intervention. The control module can either keep the exhaust fan 3 off or instruct the exhaust fan 3 to operate at extremely low power and continue monitoring.

[0050] If the detection signal reaches or exceeds the threshold, it indicates that an odor that needs to be removed has been generated. The control module immediately outputs a start command to turn on the exhaust fan 3.

[0051] Power adjustment: Furthermore, the control logic can linearly or in stages adjust the operating power of the exhaust fan 3 based on the magnitude of the detected signal exceeding the threshold. The stronger the odor, the higher the speed of the exhaust fan 3, and the stronger its suction and exhaust capabilities.

[0052] Looping and Termination: During the operation of the exhaust fan 3, the control module continuously monitors the signal from the odor sensor 5. Once the signal drops and remains below the threshold for a period of time, the control module can instruct the exhaust fan 3 to reduce its power or stop.

[0053] When the signal from pressure sensor 6 disappears (the user leaves), the control module will shut down exhaust fan 3 after completing a short delay evacuation cycle (ensuring that residual odors are removed) and return the entire system to its initial standby listening mode, waiting for the next use trigger.

[0054] In specific implementation of this invention: Phase 1: System Standby and Status Detection Standby mode: When not in use, the toilet is in a low-power standby mode. Two pressure sensors 6, symmetrically mounted at the bottom of the seat, continuously monitor the pressure signal.

[0055] Triggering Operation: When the user sits down, the two pressure sensors 6 detect a continuous, stable, and balanced pressure signal and transmit this signal to the control module. The control module logic determines that the system is in "valid use status" and then activates the system, entering the pre-operation mode. At this time, the odor sensor 5 located at the air intake 21 begins to monitor the gas composition in real time.

[0056] Phase Two: Odor Generation and Source Capture Odor release: When excrement mixes with water, odorous gases such as ammonia and hydrogen sulfide are released from the water surface. Due to the heat and humidity effect, these gases have a low density and naturally form an upward airflow that diffuses upwards along the inner wall of the toilet bowl.

[0057] Interception: The annular air duct 22 of the air duct assembly 2 is integrally formed on the upper part of the inner wall of the basin. Multiple air intakes 21 are distributed circumferentially on its inner wall and are located above the gravity direction of the basin flushing inlet 12. This arrangement ensures that the air intakes 21 are directly facing the path of the natural rise of odors, thus achieving source interception.

[0058] High-efficiency adsorption: The opening direction of each air inlet 21 is inclined downward towards the central axis of the basin, and its opening direction is directly aimed at the rising odor air mass, improving the capture efficiency; at the same time, it guides the formation of an airflow trend that converges towards the center and draws downward in the space above the basin, promoting air circulation and eliminating dead corners.

[0059] Phase 3: Establishment of negative pressure and convergence of airflow Power Start-up: When the gas parameters detected by the odor sensor 5 exceed the preset threshold in the control module, the control module immediately sends a start command to the exhaust fan 3. The exhaust fan 3, vertically fixed to the bottom wall of the installation chamber, begins to operate at high speed.

[0060] Formation of a negative pressure field: After the exhaust fan 3 starts operating, it generates a strong suction force (negative pressure) at its air inlet. This negative pressure is transmitted upward through the hollow cavity 23 connected to it, quickly filling the hollow cavity 23 and spreading to the entire annular air duct 22. Since the annular air duct is a continuous closed-loop pipe, a uniform and stable low-pressure zone (negative pressure field) is formed around the circumference above the basin opening.

[0061] Gas intake: A pressure difference is formed between the gas inside the toilet bowl (normal pressure) and the gas inside the annular duct 22 (negative pressure). Driven by this pressure difference, the mixture of odorous gases inside the bowl is forcibly drawn into the annular duct 22 from each air intake 21.

[0062] Phase 4: Airflow Guidance and Transport Circulation and convergence: The gas entering from each air inlet 21 mixes in the annular air duct 22 and flows and converges along the annular channel 22.

[0063] Downward guidance: Under the continuous suction of the exhaust fan, all the collected gas is guided to the connection between the bottom of the annular air duct and the top of the hollow cavity.

[0064] Smooth transition: Gas enters the hollow cavity 23. This cavity structure acts as a buffer and stabilizer, smoothing out the potentially pulsating and uneven airflow that converges from multiple points in the annular duct 22, and then evenly delivering it to the air inlet of the exhaust fan 3 below.

[0065] Phase 5: Power Pressurization and Direction Change Power pressurization: The exhaust fan 3 accelerates and pressurizes the inhaled gas, giving it higher kinetic and pressure energy to overcome all resistance in the subsequent exhaust assembly 4.

[0066] Flow direction conversion: Since the exhaust fan 3 adopts a vertical shaft installation method, the gas is drawn in from the axial direction, and after passing through the impeller inside the exhaust fan 3, it is discharged at high pressure from the radial (horizontal) exhaust end, realizing an efficient and compact conversion of the airflow direction from vertical to horizontal.

[0067] Phase 6: Closed-loop emission and intelligent control Directional exhaust: The high-pressure gas discharged from the exhaust fan 3 immediately enters the connecting pipe 41 of the exhaust assembly 4. The connecting pipe 41 acts as a rigid sealing channel, guiding the gas horizontally backward and directly penetrating the rear side wall of the toilet body 1, leading the gas outlet to the outside of the toilet.

[0068] Remote exhaust: During installation, one end of the exhaust pipe 42 is detachably and sealed to the outlet end of the connecting pipe 41 located outside the toilet, while the other end is connected to the building's public exhaust system or directly to the outdoors. This ensures that odorous gases are transported in a sealed manner to the external environment far from the bathroom, completely preventing indoor circulation.

[0069] Closed-loop intelligent control: Power adjustment: During operation, the control module continuously and dynamically adjusts the operating power of the exhaust fan 3 based on the real-time concentration signal fed back by the odor sensor 5. The higher the concentration, the faster the exhaust fan 3 rotates and the stronger the suction force.

[0070] Delayed shutdown: When the user leaves (the signal from pressure sensor 6 disappears), the control module instructs the exhaust fan 3 to continue running for a preset short time (such as 10-15 seconds) to ensure that the residual odor in the basin and air duct assembly 2 is completely emptied.

[0071] Return to standby: After the delay ends, the control module turns off the exhaust fan 3, and the system as a whole returns to the standby listening mode with the lowest power consumption, waiting for the next use trigger.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An odor-eliminating toilet with an integrated split-type air duct structure, characterized in that, include: The toilet body (1) has an integrated installation chamber (11) formed at its bottom. The air duct assembly (2) is arranged along the upper part of the inner wall of the toilet body (1), and its air intake (21) is located in the area above the flushing port (12) of the toilet body (1) along the direction of gravity, for collecting and guiding the odor gas generated inside the toilet. The exhaust fan (3) is located in the front area inside the installation chamber (11), and its air inlet is connected to the bottom of the air duct assembly (2) to generate suction power to continuously extract and pressurize the odor gas collected by the air duct assembly (2). The exhaust assembly (4) is located in the installation chamber (11). Its air inlet is connected to the air outlet of the exhaust fan (3). Its air outlet extends outward from the installation chamber (11) and passes through to the outside of the toilet body (1). It is used to directionally discharge the gas treated by the exhaust fan (3) into the atmospheric environment outside the toilet.

2. The odor-eliminating toilet with an integrated split-type air duct structure according to claim 1, characterized in that, The air duct assembly (2) includes: The annular air duct (22) has a hollow circular cross-section and is integrally formed on the upper part of the inner wall of the toilet body (1). Multiple air inlets (21) are provided and arranged circumferentially along the inner sidewall of the annular air duct (22); The toilet body (1) has a hollow cavity (23) formed inside below the annular air duct (22). The top of the hollow cavity (23) is connected to the bottom of the annular air duct (22), and the air inlet of the exhaust fan (3) is connected to the corresponding part of the hollow cavity (23).

3. The odor-eliminating toilet with an integrated split-type air duct structure according to claim 2, characterized in that, The side wall of the annular air duct (22) through which the air inlet (21) passes is inclined downward toward the central axis of the basin, and the angle between the side wall and the horizontal plane is 15° to 60°.

4. The odor-eliminating toilet with an integrated split-type air duct structure according to claim 1, characterized in that, The exhaust fan (3) is vertically fixed to the bottom wall of the installation chamber (11) with its rotating shaft.

5. The odor-eliminating toilet with an integrated split-type air duct structure according to claim 1, characterized in that, The exhaust assembly (4) includes: The connecting pipe (41) is installed in the installation chamber (11). Its air inlet end is sealed and connected to the air outlet end of the exhaust fan (3). Its pipe body extends backward from the exhaust fan (3) and penetrates the rear side wall of the toilet body (1), so that the air outlet end of the connecting pipe (41) is located outside the toilet body (1). The exhaust pipe (42) has one end detachably and sealed to the air outlet of the connecting pipe (41) located outside the toilet body (1), and the other end is used to connect to the external exhaust system.

6. The odor-eliminating toilet with an integrated split-type air duct structure according to claim 5, characterized in that, The exhaust fan (3) is a centrifugal fan or a crossflow fan.

7. An odor-eliminating toilet with an integrated split-type air duct structure according to any one of claims 1-6, characterized in that, Also includes: Odor sensor (5), whose detection end is set at the air intake (21) on the toilet body (1), is used to detect gas parameters that characterize odor and generate corresponding detection signals; Two pressure sensors (6) are provided, which are symmetrically arranged on both sides of the bottom of the toilet seat of the toilet body (1) to detect the user's usage status and generate corresponding pressure signals. The control module is electrically connected to the odor sensor (5), the pressure sensor (6) and the exhaust fan (3), respectively; The control module is configured to: receive the pressure signal from the pressure sensor (6) and determine whether someone is using it based on the pressure signal; when it is determined that someone is using it, receive the detection signal from the odor sensor (5) and compare the detection signal with a preset threshold, and control the start, stop and operating power of the exhaust fan (3) based on the comparison result.

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