An indoor low-level exhaust ventilation system

Abstract

This utility model discloses an indoor low-level ventilation system, including an odor extraction device installed at an odor source indoors, and an air intake device installed indoors. When the odor extraction device is working, it creates a negative pressure zone at the odor source. An odor monitoring device is also installed indoors. The odor monitoring device, odor extraction device, and air intake device are connected to an odor control device. The odor sources include toilet bowls, urinals, and floor drains. The odor extraction device includes a toilet bowl odor suction branch pipe fixed to the inner wall of the toilet bowl, which is connected to a first odor suction main pipe. A urinal bowl odor suction branch pipe is fixed to the inner wall of the urinal, and the urinal bowl odor suction branch pipe is connected to an odor transmission pipe. Under the negative pressure effect, the area around the mouth and nose of the person in the bathroom is replenished with fresh air, essentially creating an odor-free bathroom environment.

Description

Technical Field

[0001] This utility model relates to the field of indoor ventilation technology, specifically an indoor low-level exhaust ventilation system. Background Technology

[0002] In modern society, the indoor environmental quality of restrooms is receiving increasing attention. As an indispensable part of daily life, the air quality inside the restroom directly affects the user's experience and health. Issues such as odors and bacterial contamination still exist, and the problem of cross-contamination of odors remains a major challenge. Whether in a home restroom or a public restroom, unpleasant odors are always present, causing considerable inconvenience and discomfort.

[0003] Bathroom odors primarily originate from excrement and the large number of bacteria it carries. Excrement can easily leak into hard-to-reach areas, such as behind the toilet bowl. When people use the bathroom, excrement continuously produces various odors, some of which are generated by the decomposition of organic matter. For example, feces contain a large amount of protein, fat, and other organic matter. Under the action of bacteria, this organic matter decomposes to produce harmful gases such as ammonia and hydrogen sulfide. These gases have a strong, pungent odor and are the main components of bathroom odors.

[0004] In addition, the high humidity in bathrooms creates an ideal environment for bacterial growth. During reproduction, bacteria produce various harmful chemicals, further exacerbating the odor. Furthermore, bacteria can adhere to bathroom walls, floors, and sanitary ware surfaces, forming a biofilm that is not only difficult to clean but also continuously releases odors. These hard-to-reach areas are difficult to clean regularly, leading to problems such as unpleasant bathroom smells.

[0005] The commonly used high-level ventilation system in bathrooms uses a ceiling-mounted fan to expel indoor air outdoors. While this method improves ventilation to some extent, odors are concentrated near the sanitary ware, making it difficult to remove them effectively and promptly. Furthermore, when the system is running, the air must pass through the bathroom walls to reach the outside, causing odors, bacteria, and other contaminants to accumulate on the walls, floors, and ceiling, leading to pollution. Even with repeated cleaning, it's difficult to remove contaminants from corners and crevices. Additionally, odors and bacteria directly affect the respiratory system of users, causing discomfort and impacting their health. Moreover, the limited suction power of the ventilation fan makes it difficult to expel stronger odor gases, such as hydrogen sulfide, outdoors.

[0006] Prolonged exposure to such an environment can lead to health problems. Ammonia is highly irritating and can irritate the respiratory tract and eyes, causing symptoms such as coughing, tearing, and difficulty breathing. Hydrogen sulfide is a toxic gas; low concentrations can cause headaches, dizziness, and nausea, while high concentrations can even lead to coma and death. Furthermore, bacteria and mold in bathrooms can cause respiratory infections, allergic reactions, and other illnesses, posing a serious threat to people's health. Traditional bathroom ventilation fans are often too far from the odor source, causing odors to spread outside before they are even detected by the fan. Secondly, when fans and air conditioners in surrounding facilities are running, and the bathroom's ventilation fan is too small, the internal pressure of the bathroom can be higher than that of the surrounding facilities, causing odors to be drawn into adjacent facilities and spread.

[0007] Therefore, controlling the source of odors is crucial. Only by fundamentally solving the odor problem can we effectively improve the environmental quality of bathrooms and protect people's health.

[0008] Therefore, to address the above problems, a low-level indoor ventilation system is needed. Utility Model Content

[0009] The purpose of this invention is to provide an indoor low-level exhaust ventilation system. This system, by placing exhaust vents near the source of odor pollution in unsanitary corners, can directly extract odorous gases and expel them outdoors. Simultaneously, the system creates a negative pressure zone near the odor source during exhaust, preventing odors from spreading indoors. Combined with the inflow of fresh air through the air intake windows, this achieves fresh air circulation. This source-based approach effectively solves the problem of bathroom odors, providing a healthy and comfortable toilet environment. Its advantages include the rapid removal of odors, and the fact that the area around the mouth and nose of the person in the bathroom, under negative pressure, acts as a fresh air channel, essentially creating an odor-free bathroom environment.

[0010] The system is simple and easy to implement, highly operable, and suitable for large-scale deployment, such as in public restrooms, portable toilets, ventilation systems, and restrooms on trains and ships where there is high personnel flow. The system has low implementation costs, especially significantly reducing subsequent toilet maintenance costs. When indoor odor levels exceed standards for an extended period, an audible and visual warning device will issue an alert, facilitating inspection and maintenance by staff.

[0011] This utility model is implemented as follows: An indoor low-level ventilation system includes an odor extraction device installed at an odor source within the room, and an air intake device installed within the room. When the odor extraction device operates, it creates a negative pressure zone at the odor source. An odor monitoring device is also installed within the room. The odor monitoring device, odor extraction device, and air intake device are connected to an odor control device. The odor monitoring device includes a first odor sensor, a second odor sensor, and a third odor sensor. The first and second odor sensors are fixedly installed on the side walls of the room, respectively, and the third odor sensor is fixedly installed on the ceiling of the room.

[0012] The odor sources include toilets, urinals, and floor drains; the odor extraction device is located inside or near the odor source. The odor extraction device includes a toilet odor extraction branch pipe fixedly installed on the inner wall of the toilet bowl, a first odor extraction main pipe connected through the toilet odor extraction branch pipe, a urinal odor extraction branch pipe fixedly installed on the inner wall of the urinal bowl, an odor transmission pipe connected to the urinal odor extraction branch pipe, a second odor extraction main pipe connected through the odor transmission pipe, a first floor drain odor extraction branch pipe installed above the floor drain, the first floor drain odor extraction branch pipe connected to the second odor extraction main pipe, a second floor drain odor extraction branch pipe connected through the floor drain on the side wall of the floor drain, the second floor drain odor extraction branch pipe connected to the second odor extraction main pipe, and exhaust fans installed at the air outlets of the first and second odor extraction main pipes.

[0013] Furthermore, a first odor suction through-hole is provided on the odor suction branch pipe of the toilet bowl, and a gap odor suction branch pipe is provided in the gap at the back end of the toilet bowl. The gap at the back end of the toilet bowl is the easiest place for dirt and grime to accumulate and generate odors. This utility model provides odor suction branch pipes in the gap behind the toilet bowl and in the gap above the floor drain, which can continuously suck out odors from these hygiene dead corners and areas that are not frequently cleaned, thus fundamentally solving the problem of indoor odor generation. The gap odor suction branch pipe is connected to the first odor suction main pipe, and a second odor suction through-hole is provided on the urinal odor suction branch pipe.

[0014] The air intake device includes an air intake window located on the interior wall.

[0015] The odor control device includes a control processing unit. The first odor sensor, the second odor sensor, and the third odor sensor of the odor monitoring device are all electrochemical sensors. The control processing unit is an STM32 type control processing unit. The control processing unit is also connected to an audible and visual warning device.

[0016] Furthermore, the odor monitoring device, odor extraction device, and air intake device are connected to an odor control device, specifically, the first odor sensor, the second odor sensor, and the third odor sensor are connected to the input terminal of the control processing unit, and the exhaust fan is connected to the output terminal of the control processing unit.

[0017] Furthermore, a human body sensor is connected to the control processing unit. This sensor is installed on both sides of the door frame leading into the room. When the sensor detects someone entering, it immediately activates the exhaust fan. An odor sensor monitors the odor concentration in the bathroom in real time. When the odor concentration exceeds a set threshold, the control processing unit automatically starts the exhaust fan. When the odor concentration decreases to a certain level, the ventilation system automatically stops. This automated control system not only improves system efficiency but also saves energy. Simultaneously, the exhaust fan automatically starts when someone enters the bathroom and reduces its speed after the person leaves. The control processing unit is also connected to indoor lighting; the lights quickly turn on when someone enters the bathroom and automatically turn off after the person leaves.

[0018] Compared to existing technologies, this invention, by placing exhaust vents near the odor source, can directly extract odorous gases and vent them outdoors. Simultaneously, the system creates a negative pressure zone near the odor source during exhaust, preventing odors from spreading indoors. Combined with the inflow of fresh air through the air intake windows, this ensures fresh air circulation. This source-based approach effectively solves the bathroom odor problem, providing a healthy and comfortable toilet environment. Its advantages include the rapid removal of odors, and the negative pressure creating a fresh air intake around the mouth and nose, essentially creating an odor-free bathroom environment.

[0019] The system is simple and easy to implement, highly operable, and suitable for large-scale deployment, such as in public restrooms, portable toilets, ventilation systems, and restrooms on trains and ships where there is high personnel flow. The system has low implementation costs, especially significantly reduced maintenance costs in the later stages.

[0020] This invention features an exhaust system installed near the source of odor in the bathroom, ensuring that odors are detected and expelled immediately upon appearance, preventing them from spreading outdoors. Secondly, when there are few users and the bathroom has virtually no odor, or when the environmental pressure of adjacent facilities is high, the exhaust fan operates at low speed, ensuring the bathroom is always under negative pressure and continuously replenished with fresh, odor-free air. When there are many users and the bathroom has a strong odor, the exhaust fan operates at high speed, ensuring the bathroom's environmental pressure is lower than that of adjacent facilities, ensuring timely odor removal. Because the bathroom operates on a single or multi-point basis, air is automatically replenished based on the local pressure, resulting in a low airflow rate. Therefore, no eddy currents are generated, and odor removal is not hindered. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the device of this utility model; Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 3 This is a system structure diagram of this utility model; Figure 4 This is a circuit diagram of the control processing unit of this utility model; The system includes: exhaust fan 1, first odor extraction main pipe 11, toilet odor extraction branch pipe 12, first odor extraction through hole 121, gap odor extraction branch pipe 122, second odor extraction main pipe 13, urinal odor extraction branch pipe 14, second odor extraction through hole 141, odor transmission pipe 15, first floor drain odor extraction branch pipe 16, second floor drain odor extraction branch pipe 17, toilet 2, odor source generation area 3, fresh air entry distribution area 31, floor drain 4, urinal 5, air inlet 92, first odor sensor 6, second odor sensor 7, third odor sensor 9, first odor source 191, second odor source 192, and odor extraction device 193. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Please see Figures 1-4 In this embodiment, as Figure 2 An indoor low-level ventilation system includes an odor extraction device installed at an odor source within the room, and an air intake device installed within the room. When the odor extraction device operates, it creates a negative pressure zone at the odor source. An odor monitoring device is also installed within the room. The odor monitoring device, odor extraction device, and air intake device are connected to an odor control device. The odor monitoring device includes a first odor sensor, a second odor sensor, and a third odor sensor. The first and second odor sensors are fixedly installed on the side walls of the room, respectively, and the third odor sensor is fixedly installed on the ceiling of the room.

[0025] The odor source includes a toilet bowl 2, a urinal 5, and a floor drain 4; the odor extraction device is located inside the odor source or in the area near the odor source. The odor extraction device includes a toilet odor extraction branch pipe 12 fixedly installed on the inner wall of the toilet bowl, the toilet odor extraction branch pipe 12 being connected to a first odor extraction main pipe 11, a urinal odor extraction branch pipe 14 fixedly installed on the inner wall of the urinal, the urinal odor extraction branch pipe 14 being connected to an odor transmission pipe 15, the odor transmission pipe 15 being connected to a second odor extraction main pipe 13, and a first floor drain odor extraction branch pipe 16 installed above the floor drain 4, the first floor drain odor extraction branch pipe 16 being connected to the second odor extraction main pipe 13.

[0026] A second odor extraction branch pipe 17 is connected to the side wall of the floor drain 4, and the second odor extraction branch pipe 17 is connected to the second odor extraction main pipe 13. An exhaust fan 1 is installed at the outlet of the first odor extraction main pipe 11 and the second odor extraction main pipe 13. The exhaust fan 1 uses a low-noise variable frequency fan. The gap at the back of the toilet bowl is the easiest place for dirt and grime to accumulate and for odors to develop. This invention provides odor extraction branch pipes in the gap behind the toilet bowl and in the gap above the floor drain, which can continuously extract odors from these unsanitary corners and areas that are not frequently cleaned, thus fundamentally solving the problem of indoor odors.

[0027] In this embodiment, a first odor extraction through-hole 121 is provided on the odor extraction branch pipe of the toilet bowl, and a gap odor extraction branch pipe 122 is provided in the gap at the back end of the toilet bowl. The gap odor extraction branch pipe 122 is connected to the first odor extraction main pipe 11. A second odor extraction through-hole 141 is provided on the odor extraction branch pipe 14 of the urinal bowl. Multiple air vents are arranged near the odor source as needed for the first odor extraction through-hole 121 and the second odor extraction through-hole 141.

[0028] The air intake device includes an air intake window 92 located on the interior wall.

[0029] The odor control device includes a control processing unit. The first odor sensor, the second odor sensor, and the third odor sensor of the odor monitoring device are all electrochemical sensors. The control processing unit is an STM32 type control processing unit. The control processing unit is also connected to an audible and visual warning device.

[0030] In this embodiment, the odor monitoring device, odor extraction device, and air intake device are connected to an odor control device. Specifically, the first odor sensor 6, the second odor sensor 7, and the third odor sensor 9 are connected to the input terminal of the control processing unit, and the exhaust fan is connected to the output terminal of the control processing unit.

[0031] In this embodiment, a human body sensor is also connected to the control processing unit. The human body sensor is installed on both sides of the door frame leading into the room. When the human body sensor detects someone entering, it immediately starts the exhaust fan. An odor sensor can monitor the odor concentration in the bathroom in real time. When the odor concentration exceeds a set threshold, the control processing unit automatically increases the speed of the exhaust fan. This automated control system not only improves system operating efficiency but also saves energy. Simultaneously, the exhaust fan automatically starts when someone enters the bathroom; when the person leaves, the exhaust fan speed decreases. The control processing unit is also connected to indoor lighting; when someone enters the bathroom, the lighting is quickly turned on; when the person leaves, the lighting automatically turns off.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An indoor low-level exhaust ventilation system, characterized by: The device includes an odor extraction device installed indoors to detect odor sources, and an air intake device installed indoors. When the odor extraction device is working, it creates a negative pressure zone at the odor source indoors. An odor monitoring device is also installed indoors. The odor monitoring device, the odor extraction device, and the air intake device are connected to an odor control device.

2. An indoor low-level exhaust ventilation system according to claim 1, characterized in that The odor sources include a latrine (2), a urinal (5), and a floor drain (4); the odor extraction device is located inside the odor source or in the vicinity of the odor source. The odor extraction device includes a toilet odor extraction branch pipe (12) fixedly installed on the inner wall of the toilet bowl (2), the toilet odor extraction branch pipe (12) being connected to a first odor extraction main pipe (11), a urinal odor extraction branch pipe (14) fixedly installed on the inner wall of the urinal, the urinal odor extraction branch pipe (14) being connected to an odor transmission pipe (15), the odor transmission pipe (15) being connected to a second odor extraction main pipe (13), and the odor extraction device includes a toilet odor extraction branch pipe (14) fixedly installed on the inner wall of the urinal, the urinal odor extraction branch pipe (14) being connected to an odor transmission pipe (15), and the odor transmission pipe (15) being connected to a second odor extraction main pipe (13). A first odor extraction branch pipe (16) is provided above the floor drain (4). The first odor extraction branch pipe (16) is connected to the second odor extraction main pipe (13). A second odor extraction branch pipe (17) is connected through the side wall of the floor drain (4). The second odor extraction branch pipe (17) is connected to the second odor extraction main pipe (13). A fan (1) is provided at the air outlet of the first odor extraction main pipe and the second odor extraction main pipe.

3. An indoor low-level exhaust ventilation system according to claim 2, characterized in that A first odor suction through hole (121) is provided on the odor suction branch pipe (12) of the toilet bowl, and a gap odor suction branch pipe (122) is provided in the gap at the back end of the toilet bowl. The gap odor suction branch pipe (122) is connected to the first odor suction main pipe (11). A second odor suction through hole (141) is provided on the odor suction branch pipe (14) of the urinal bowl.

4. The indoor low-level exhaust ventilation system according to claim 1, wherein The odor monitoring device includes a first odor sensor (6), a second odor sensor (7), and a third odor sensor (9). The first odor sensor and the second odor sensor are fixedly installed on the two side walls of the room, respectively, and the third odor sensor is fixedly installed on the ceiling of the room.

5. The indoor low-level exhaust ventilation system according to claim 1, wherein The air intake device includes an air intake window (92) located on the interior wall.

6. An indoor low-level exhaust ventilation system according to claim 1, characterized in that The odor control device includes a control processing unit. The first odor sensor, the second odor sensor, and the third odor sensor of the odor monitoring device are all electrochemical sensors. The control processing unit is an STM32 type control processing unit. The control processing unit is also connected to an audible and visual warning device.

7. An indoor low-level exhaust ventilation system according to claim 1, characterized in that The odor monitoring device, odor extraction device, and air intake device are connected to an odor control device. Specifically, the first odor sensor, the second odor sensor, and the third odor sensor are connected to the input terminal of the control processing unit, and the exhaust fan is connected to the output terminal of the control processing unit.

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