Air pollution detection device

Abstract

The invention discloses an air pollution detection device, and relates to the technical field of air detection, the air pollution detection device comprises a bottom plate, a detection main body, an air inlet pipe, an air inlet assembly and a detection assembly, and the detection assembly comprises a dust detection mechanism, a gas state detection mechanism and a temperature and humidity detection mechanism. Ambient air is actively or passively captured through the air inlet assembly and then conveyed into the detection main body through the air inlet pipe, and the air passes through a continuous air channel of the air inlet assembly, the air inlet pipe and the detection main body, so that it is ensured that an air sample to be detected can be effectively introduced; the concentration of particulate matters in the air is continuously measured in real time through the dust detection mechanism, gaseous pollutants in the air are continuously recognized and subjected to concentration analysis through the gaseous detection mechanism, and the temperature and humidity of the air are measured through the temperature and humidity detection mechanism for continuous detection; therefore, the air quality can be comprehensively detected and evaluated.

Description

Technical Field

[0001] This invention relates to the field of air detection technology, and more specifically to an air pollution detection device. Background Technology

[0002] With the acceleration of industrialization and urbanization, air pollution has become an increasingly serious problem. Particulate matter (such as PM2.5 and PM10) and harmful gases (such as formaldehyde, sulfur dioxide, and benzene compounds) in the air pose a great threat to human health. Existing air monitoring equipment suffers from large single-detection errors, traditional equipment relies on single-point sampling, and it is difficult to eliminate the interference of residual airflow on subsequent detection; moreover, most existing equipment can only detect one type of pollutant, either dust or gaseous pollutants, making it difficult to comprehensively detect and assess air quality. Summary of the Invention

[0003] The purpose of this invention is to provide an air pollution detection device to overcome the aforementioned shortcomings of the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An air pollution detection device includes a base plate, a detection body disposed on one upper side of the base plate, an air intake pipe disposed at one end of the detection body, an air intake assembly disposed at the end of the air intake pipe away from the detection body, the air intake assembly being disposed on the upper side of the base plate away from the detection body, a control module disposed at the upper end of the detection body, and further includes: The detection component is disposed inside the detection body and electrically connected to the control module. The detection component includes a dust detection mechanism for continuously detecting the concentration of particles in the air. A gaseous detection mechanism is disposed on one side of the dust detection mechanism for continuously detecting gaseous pollutants in the air. The dust detection mechanism and the gaseous detection mechanism are isolated from each other, and both of them are provided with a temperature and humidity detection mechanism at their ends.

[0005] As described above, the detection body includes a first chamber, a second chamber, and a third chamber. The dust detection mechanism is located in the first chamber, the gaseous detection mechanism is located in the second chamber, and the temperature and humidity detection mechanism is located in the third chamber. The first chamber, the second chamber, and the third chamber are all connected to each other. A one-way valve is provided between each of the first chamber, the second chamber, and the third chamber. An exhaust pipe is provided at the end of the detection body away from the air intake assembly, and a one-way valve is provided on the exhaust pipe.

[0006] As described above, the air intake assembly includes two connecting pipes, each of which has a sampling head at one end and an air pump at the middle. The end of each connecting pipe away from the sampling head is connected to a three-way pipe, which is connected to the air intake pipe. The three-way pipe is equipped with a conversion mechanism, and at most one of the connecting pipes has a cyclone separator at its end.

[0007] The aforementioned three-way pipe includes two air inlets and one air outlet. The middle cross-section of the two air inlets is rectangular, and the two air inlets are arranged in parallel.

[0008] The aforementioned conversion mechanism includes a switching plate, which is dynamically sealed between the two air intakes. A rack is provided in the middle of the switching plate, and a switching motor is provided at the upper end of the base plate. A drive gear is provided at the output end of the switching motor, and the drive gear meshes with the rack.

[0009] As described above, the switching plate is symmetrically provided with two blocking positions and two open positions, and each of the two air intakes is always provided with one blocking position and one open position.

[0010] The above also includes a flow-dividing assembly, which includes a baffle. The baffle is rotatably disposed inside the air intake pipe. A shroud is disposed at one end of the baffle facing the air intake assembly. An air intake channel is disposed inside the detection body. Two small holes are offset on the side of the air intake channel. The air intake channel is connected to the first chamber and the second chamber through the small holes. A flow-dividing block is slidably disposed inside the air intake channel. A buffer spring is disposed between the flow-dividing block and the detection body. A sealing ring is disposed on the outside of the flow-dividing block. Two flow-dividing grooves are disposed at the end of the flow-dividing block away from the buffer spring.

[0011] The dust detection mechanism described above includes a laser emitter and a photoelectric receiver, with the laser emitter and the photoelectric receiver arranged parallel to each other on the inner wall of the first chamber.

[0012] As described above, the gaseous detection mechanism includes multiple detection boxes, and each detection box contains a detection reagent.

[0013] The temperature and humidity detection mechanism described above includes a first temperature and humidity detection element and a second temperature and humidity detection element. The first humidity detection element is disposed in the third chamber, and the second humidity detection element is disposed on the upper outer side of the detection body.

[0014] In the above technical solution, the beneficial effects of the present invention are as follows: The present invention actively or passively captures ambient air through the air intake component, and then transports it to the inside of the detection body through the air intake pipe. The air passes through the continuous air path channel of the air intake component, the air intake pipe and the detection body, ensuring that the air sample to be tested can be effectively introduced. Furthermore, the dust detection mechanism continuously measures the concentration of particulate matter in the air in real time, the gaseous detection mechanism continuously identifies and analyzes the concentration of gaseous pollutants in the air, and the temperature and humidity detection mechanism continuously measures the temperature and humidity of the air for continuous detection, so as to comprehensively detect and evaluate the air quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A cross-sectional view of an air pollution detection device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the planar structure between the switching plate, the blocking position, the open position, and the rack according to another embodiment of the present invention; Figure 3 A cross-sectional view of the three-way pipe, the air inlet, and the air outlet provided in another embodiment of the present invention; Figure 4 A cross-sectional view of the detection body, first chamber, second chamber, third chamber, exhaust pipe, air intake channel and detection components provided in another embodiment of the present invention; Figure 5 Provided for another embodiment of the present invention Figure 1 A magnified view of a portion of point M; Figure 6 Provided for another embodiment of the present invention Figure 1 A magnified view of N points; Figure 7 Provided for another embodiment of the present invention Figure 1 A magnified view of a portion of point S.

[0017] Explanation of reference numerals in the attached figures: 1. Base plate; 10. Detection body; 100. First chamber; 101. Second chamber; 102. Third chamber; 103. Exhaust pipe; 104. Air intake channel; 11. Air intake pipe; 2. Air intake assembly; 20. Connecting pipe; 21. Data acquisition head; 22. Air pump; 23. T-connector; 230. Air intake section; 231. Air outlet section; 24. Conversion mechanism; 240. Switching plate; 2400. Blocking position; 2401. Open position; 241. Rack; 242 1. Switching motor; 243. Drive gear; 25. Cyclone separator; 3. Detection component; 30. Dust detection mechanism; 300. Laser emitter; 301. Photoelectric receiver; 31. Gas detection mechanism; 310. Detection box; 32. Temperature and humidity detection mechanism; 320. First temperature and humidity detection element; 321. Second temperature and humidity detection element; 4. Diverting component; 40. Baffle; 41. Rectifier; 42. Diverting block; 43. Buffer spring; 44. Diverting groove. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "side", "inner", "outer", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] like Figures 1-7 As shown, an air pollution detection device provided in this embodiment of the invention includes a base plate 1, a detection body 10 disposed on one side of the upper end of the base plate 1, an air inlet pipe 11 disposed at one end of the detection body 10, an air inlet assembly 2 disposed at the end of the air inlet pipe 11 away from the detection body 10, the air inlet assembly 2 disposed on the upper end of the base plate 1 away from the detection body 10, a control module disposed at the upper end of the detection body 10, and further includes: The detection component 3 is disposed inside the detection body 10 and electrically connected to the control module. The detection component 3 includes a dust detection mechanism 30 for detecting the concentration of particles in the air. A gaseous detection mechanism 31 is disposed on one side of the dust detection mechanism 30 for detecting gaseous pollutants in the air. The dust detection mechanism 30 and the gaseous detection mechanism 31 are isolated from each other, and a temperature and humidity detection mechanism 32 is disposed at their ends.

[0021] In another embodiment of the present invention, the detection body 10 includes a first chamber 100, a second chamber 101, and a third chamber 102. The dust detection mechanism 30 is disposed in the first chamber 100, the gaseous detection mechanism 31 is disposed in the second chamber 101, and the temperature and humidity detection mechanism 32 is disposed in the third chamber 102. The first chamber 100, the second chamber 101, and the third chamber 102 are all connected to the third chamber 102. A one-way valve is provided between the first chamber 100, the second chamber 101, and the third chamber 102. An exhaust pipe 103 is provided at the end of the detection body 10 away from the air intake assembly 2, and a one-way valve is provided on the exhaust pipe 103. The specific implementation method is as follows: The air intake assembly 2 is controlled by the control module to operate, so that air is transported through the air intake assembly 2 to the air intake pipe 11 and finally enters the detection body 10. The air entering the detection body 10 enters the first chamber 100 and the second chamber 101 respectively. The dust detection mechanism 30 in the first chamber 100 detects the particle concentration of dust (such as PM2.5 or PM10) in the air, and the gaseous detection mechanism 31 in the second chamber 101 detects gaseous pollutants (such as formaldehyde, benzene series, sulfur dioxide, etc.) in the air. After being detected by the dust detection mechanism 30 and the gaseous detection mechanism 31, the air is discharged to the third chamber 102 through a one-way valve. The temperature and humidity detection mechanism 32 in the third chamber 102 detects the temperature and humidity of the air. After the temperature and humidity are detected, the air is discharged from the detection body 10 through the exhaust pipe 103. When the air flows in the detection body 10, the one-way valve prevents the air from flowing backward to ensure that the air detection is accurate and reliable.

[0022] In another embodiment of the present invention, the air intake assembly 2 includes two connecting pipes 20, each of which is provided with a sampling head 21 at one end and an air pump 22 in the middle of each of which is provided. The end of each connecting pipe 20 away from the sampling head 21 is connected to a three-way pipe 23, which is connected to the air intake pipe 11. A conversion mechanism 24 is provided on the three-way pipe 23, and a cyclone separator 25 is provided at the end of at most one of the connecting pipes 20. The specific implementation method is as follows: A filter screen is provided on the sampling head 21. During air detection, the control module can only drive one air pump 22 to run at a time. Thus, when the air pump 22 is running, it can draw air from the sampling head 21 into the connecting pipe 20 connected to it. At the same time, the switching mechanism 24 controls the three-way pipe 23 to connect the air inlet pipe 11 and the connecting pipe 20, allowing the gas to directly enter the detection body 10 through the air inlet pipe 11. The air entering the detection body 10 is then divided and enters the first chamber 100 and the second chamber 101 respectively, so that the dust detection mechanism 30 and the gas detection mechanism 31 can detect the air entering the detection body 10 respectively. In addition, the control module controls the rotation mechanism to switch and connect... The connecting pipe 20 allows the control module to synchronously control the operation of another air pump 22 (the running air pump 22 stops running), so that the running air pump 22 delivers gas to the air inlet pipe 11 through another sampling head 21 and another connecting pipe 20. When the air is delivered from the connecting pipe 20 to the air inlet pipe 11, the air will pass through the cyclone separator 25, which removes large particles of impurities from the air. At this time, the air after the removal of large particles of impurities is split again and enters the first chamber 100 and the second chamber 101 respectively, so that the dust detection mechanism 30 and the gas detection mechanism 31 respectively detect the air entering the detection body 10, so as to form a control group with the air that has not removed large particles of impurities, ensuring that the air detection results are accurate and reliable.

[0023] In another embodiment of the present invention, the three-way pipe 23 includes two air inlets 230 and one air outlet 231. The middle cross section of the two air inlets 230 is rectangular, and the two air inlets 230 are arranged in parallel. The specific implementation is as follows: each air inlet 230 is connected to a connecting pipe 20, and the air outlet 231 is connected to the air inlet pipe 11, so that air can directly enter the air outlet 231 and the air inlet pipe 11 through the air inlet 230, or pass through the cyclone separator 25 and then enter the air outlet 231 and the air inlet pipe 11 through the air inlet 230, so that the two sets of air entering the detection component 3 form a comparison.

[0024] In another embodiment of the present invention, the conversion mechanism 24 includes a switching plate 240, which is disposed between the two air intakes 230 in a dynamic sealing manner. A rack 241 is disposed in the middle of the switching plate 240, and a switching motor 242 is disposed at the upper end of the base plate 1. A drive gear 243 is disposed at the output end of the switching motor 242, and the drive gear 243 meshes with the rack 241. The specific implementation method is as follows: During air detection, the control module controls the switching mechanism 24 to work, so that the switching mechanism 24 controls the air to enter the intake pipe 11 through different paths. Specifically, when the switching motor 242 drives the drive gear 243 to rotate, the drive gear 243 drives the rack 241 to move, thereby causing the rack 241 to drive the switching plate 240 to move along the air outlet 231. This causes the switching plate 240 to control the air outlet pipe that is not connected to the cyclone separator 25 to connect the intake pipe 11 and the connecting pipe 20. At this time, under the action of the air pump 22, the air passes through the sampling head 21, the connecting pipe 20, the air inlet 230 and the air outlet 231 in sequence before entering the intake pipe 11. 1; When the switching motor 242 drives the drive gear 243 to rotate in the opposite direction, the drive gear 243 drives the rack 241 to move, which in turn drives the switching plate 240 to move in the opposite direction along the air outlet 231. This causes the switching plate 240 to control the air outlet pipe connected to the cyclone separator 25 to connect the air inlet pipe 11 and the connecting pipe 20. At this time, under the action of the air pump 22, the air passes through the sampling head 21, the connecting pipe 20, the cyclone separator 25, the air inlet 230 and the air outlet 231 in sequence before entering the air inlet pipe 11. Thus, the air entering the detection component 3 through different paths forms a control group, so that the detection component 3 can accurately and reliably detect the air.

[0025] In another embodiment of the present invention, two blocking positions 2400 and two open positions 2401 are symmetrically arranged on the switching plate 240, and one blocking position 2400 and one open position 2401 are always respectively arranged in the two air intakes 230; The specific implementation is as follows: The switching plate 240 connects the air intake pipe 11 to different connecting pipes 20 through two blocking positions 2400 and two open positions 2401 on it. Each of the two air intake parts 230 is always provided with a blocking position 2400 and an open position 2401. That is, when one of the two air intake parts 230 is in the blocking position 2400 of the switching plate 240, the other air intake part 230 is in the open position 2401 of the switching plate 240. When the switching motor 242 drives the switching plate 240 to move through the drive gear 243 and rack 241, the air outlet pipe switches from the blocking position 2400 to the open position 2401, and at the same time, the other air outlet pipe switches from the open position 2401 to the blocking position 2400.

[0026] In another embodiment of the present invention, a diversion component 4 is further included. The diversion component 4 includes a baffle 40, such as a fan blade. The baffle 40 is rotatably disposed in the air intake pipe 11. A shroud 41 is disposed at one end of the baffle 40 facing the air intake component 2. An air intake channel 104 is disposed in the detection body 10. Two small holes are offset on the side of the air intake channel 104. The air intake channel 104 is connected to the first chamber 100 and the second chamber 101 respectively through the small holes. A diversion block 42 is slidably disposed in the air intake channel 104. A buffer spring 43 is disposed between the diversion block 42 and the detection body 10. A sealing ring is disposed on the outside of the diversion block 42. Two diversion grooves 44 are disposed at the end of the diversion block 42 away from the buffer spring 43. The specific implementation method is as follows: After the air pump 22 draws air from the collection head 21 into the air inlet pipe 11, the continuous air flow passively drives the turbulence member 40 to rotate inside the air inlet pipe 11. This causes the rotated turbulence member 40 to agitate the air inside the air inlet pipe 11, so that dust and gaseous pollutants are evenly mixed in the air. This ensures that the impurities and pollutants in the air are in a uniform state, so that the detection results of the dust detection mechanism 30 and the gas detection mechanism 31 are more accurate after the air enters the first chamber 100 and the second chamber 101. The rectifier 41 makes the air flow uniformly. The airflow passes through the intake pipe 11 and enters the intake channel 104. At this time, the separator block blocks the small hole connecting the intake channel 104 and the second chamber 101. Thus, the air first enters the first chamber 100 through the small hole connecting the intake channel 104 and the first chamber 100, thereby quickly filling the first chamber 100 with air so that the dust detection mechanism 30 can detect the particle concentration in the air. After the dust detection mechanism 30 detects the particle concentration in the air, the first chamber 100 is already filled with air. At this time, the excess air flows to the third chamber. Inside chamber 102, the air pump 22 continues to operate, continuously delivering air through the intake pipe 11 into the intake channel 104. The gas entering the intake channel 104 pushes the diverter block 42, causing it to compress the buffer spring 43 and move away from the intake pipe 11. This causes the diverter block 42 to block the small hole connecting the intake channel 104 and the first chamber 100, while simultaneously exposing the small hole connecting the intake channel 104 and the second chamber 101. This allows air to enter the second chamber from the intake channel 104. 101, thereby rapidly filling the second chamber 101 with air so that the gas detection mechanism 31 can detect the air in the second chamber 101. In addition, after the air entering the second chamber 101 is detected, it is also discharged to the third chamber 102 so that the temperature and humidity detection mechanism 32 can detect the temperature and humidity of the air in the third chamber 102. After the air fills the third chamber 102, the air that enters later will compress the gas that entered the third chamber 102 first, so that the gas will finally be discharged from the detection body 10 through the exhaust pipe 103. The diversion groove 44 facilitates the guidance of air into the small hole.

[0027] Furthermore, the dust and impurities contained in the air entering the air inlet pipe 11 from different connecting pipes 20 are completely different. Therefore, before testing the air entering the detection body 10 from different connecting pipes 20, it is necessary to continuously introduce air for a period of time so that the air entering from the same connecting pipe 20 can completely fill the first chamber 100, the second chamber 101 and the third chamber 102, so as to avoid the air originally remaining in the first chamber 100, the second chamber 101 and the third chamber 102 from affecting the test results.

[0028] In another embodiment of the present invention, the dust detection mechanism 30 includes a laser emitter 300 and a photoelectric receiver 301, wherein the laser emitter 300 and the photoelectric receiver 301 are arranged parallel to each other on the inner wall of the first chamber 100; The specific implementation method is as follows: When the dust detection mechanism 30 is working, the laser emitter 300 emits a laser and receives the laser signal through the photoelectric receiver 301. In this way, after the first chamber 100 is completely filled with air (air is continuously introduced from the same connecting pipe 20 for a period of time), the photoelectric receiver 301 receives the attenuation of the laser and the concentration of scattered dust particles.

[0029] In another embodiment of the present invention, the gaseous detection mechanism 31 includes a plurality of detection boxes 310, and each detection box 310 contains a detection reagent; The specific implementation method is as follows: after air enters the second chamber 101, the air is immersed in different detection boxes 310, so that the detection reagents in the detection boxes 310 can detect gaseous pollutants in the air, and the detection reagents in the detection boxes 310 are replaced after each detection.

[0030] In another embodiment of the present invention, the temperature and humidity detection mechanism 32 includes a first temperature and humidity detection element 320 and a second temperature and humidity detection element 321. The first humidity detection element is disposed in the third chamber 102, and the second humidity detection element is disposed on the upper outer side of the detection body 10. The specific implementation method is as follows: After the air flowing from the first chamber 100 and the second chamber 101 to the third chamber 102 comes into contact with the first temperature and humidity detection element 320, the first temperature and humidity detection element 320 continuously monitors the air in order to obtain stable data. The stable data is the temperature and humidity of the air inside the detection body 10. At the same time, the temperature and humidity of the outside air are directly detected by the second temperature and humidity detection element 321 provided on the upper side of the detection body 10.

[0031] Working principle: The control module controls the air intake assembly 2 to deliver air through the air intake assembly 2 to the air intake pipe 11, and finally into the detection body 10. The air entering the detection body 10 then enters the first chamber 100 and the second chamber 101 respectively. The dust detection mechanism 30 in the first chamber 100 detects the concentration of dust particles in the air, and the gaseous detection mechanism 31 in the second chamber 101 detects gaseous pollutants in the air. After being detected by the dust detection mechanism 30 and the gaseous detection mechanism 31, the air is discharged to the third chamber 10 through a one-way valve. 2. The temperature and humidity detection mechanism 32 in the third chamber 102 detects the temperature and humidity of the air. After the air temperature and humidity are detected, it is discharged from the detection body 10 through the exhaust pipe 103. When the air flows in the detection body 10, a one-way valve prevents the air from flowing backward to ensure that the air detection is accurate and reliable. A filter is installed on the sampling head 21. When the air is detected, the control module can only drive one air pump 22 to run at a time. Thus, when the air pump 22 is running, the air pump 22 can draw air from the sampling head 21 into the connecting pipe 20 connected to the air pump 22, and at the same time, through conversion... Mechanism 24 controls the three-way pipe 23, connecting the inlet pipe 11 and the connecting pipe 20, allowing gas to directly enter the detection body 10 through the inlet pipe 11. The air entering the detection body 10 is then split and enters the first chamber 100 and the second chamber 101 respectively, allowing the dust detection mechanism 30 and the gas detection mechanism 31 to detect the air entering the detection body 10. Furthermore, the control module controls the rotating mechanism to switch the connecting pipe 20, which is connected to the inlet pipe, enabling the control module to synchronously control another suction pump 22, thus allowing the operating suction pump 22 to... A sampling head 21 and another connecting pipe 20 deliver gas to the air inlet pipe 11. When the air is delivered from the connecting pipe 20 to the air inlet pipe 11, the air passes through the cyclone separator 25, which removes large particles of impurities from the air. After the large particles of impurities are removed, the air is split again and enters the first chamber 100 and the second chamber 101 respectively. This allows the dust detection mechanism 30 and the gas detection mechanism 31 to detect the air entering the detection body 10, so as to form a control group with the air that has not had large particles of impurities removed, ensuring that the air detection results are accurate and reliable. Each air inlet 230 is connected to a connecting pipe 20, and the air outlet 231 is connected to the air inlet pipe 11, so that air can directly enter the air outlet 231 and the air inlet pipe 11 through the air inlet 230, or pass through the cyclone separator 25 and then through the air inlet 230 to enter the air outlet 231 and the air inlet pipe 11, thereby making the two sets of air entering the detection component 3 form a comparison; during air detection, the control module controls the switching mechanism 24 to work, so that the switching mechanism 24 controls the air to enter the air inlet pipe 11 through different paths. Specifically, when the switching motor 242 drives the drive gear 243 to rotate When the drive gear 243 drives the rack 241 to move, the rack 241 drives the switching plate 240 to move along the air outlet 231. The switching plate 240 then controls the air outlet pipe not connected to the cyclone separator 25 to connect the air inlet pipe 11 and the connecting pipe 20. At this time, air, under the action of the air pump 22, passes sequentially through the collection head 21, the connecting pipe 20, the air inlet 230, and the air outlet 231 before entering the air inlet pipe 11. When the switching motor 242 drives the drive gear 243 to rotate in the opposite direction, the drive gear 243 drives the rack 241 to move, which in turn drives the switching plate 240 to move along the air outlet 231. The switch plate 240 moves in the opposite direction along the air outlet 231, causing the air outlet pipe connected to the cyclone separator 25 to connect to the air inlet pipe 11 and the connecting pipe 20. At this time, under the action of the air pump 22, the air passes through the sampling head 21, the connecting pipe 20, the cyclone separator 25, the air inlet 230 and the air outlet 231 in sequence before entering the air inlet pipe 11. The air entering the detection component 3 through different paths in this way forms a control group, so that the detection component 3 can accurately and reliably detect the air. The switch plate 240 is connected to the air inlet pipe through two blocking positions 2400 and two open positions 2401. 11 is connected to different pipes 20, and each of the two air inlets 230 is always provided with a blocking position 2400 and an open position 2401. That is, when one of the two air inlets 230 is in the blocking position 2400 of the switching plate 240, the other air inlet 230 is in the open position 2401 of the switching plate 240. When the switching motor 242 drives the switching plate 240 to move through the drive gear 243 and rack 241, the air outlet pipe switches from the blocking position 2400 to the open position 2401, and at the same time, the other air outlet pipe switches from the open position 2401 to the blocking position 2400. After the air pump 22 draws air from the sampling head 21 into the intake pipe 11, the continuous air flow passively drives the baffle 40 to rotate within the intake pipe 11. This causes the rotating baffle 40 to agitate the air within the intake pipe 11, ensuring that dust and gaseous pollutants are evenly mixed in the air. This ensures that impurities and pollutants in the air are in a uniform state, making the detection results of the dust detection mechanism 30 and the gas detection mechanism 31 more accurate after the air enters the first chamber 100 and the second chamber 101. The rectifier 41 ensures that the air flows evenly towards the baffle 40. After flowing through the intake pipe 11, the air enters the intake channel 104. At this time, the separator block blocks the small hole connecting the intake channel 104 and the second chamber 101. Thus, the air first passes through the connecting... Air enters the first chamber 100 through the small hole in the air intake channel 104, rapidly filling it with air so that the dust detection mechanism 30 can detect the concentration of particles in the air. After the dust detection mechanism 30 detects the concentration of particles in the air, the first chamber 100 is full of air. At this time, the excess air flows into the third chamber 102, while the suction pump 22 continues to operate, continuously delivering air to the air intake channel 104 through the air intake pipe 11. The gas entering the air intake channel 104 can push the diverter block 42, causing the diverter block 42 to compress the buffer spring 43 and move away from the air intake pipe 11. This causes the moved diverter block 42 to seal the small hole connecting the air intake channel 104 and the first chamber 100. The diverting block 42, after being moved, exposes the small hole connecting the air intake channel 104 and the second chamber 101, allowing air to enter the second chamber 101 from the air intake channel 104. This quickly fills the second chamber 101 with air, enabling the gas detection mechanism 31 to detect the air in the second chamber 101. After the air entering the second chamber 101 is detected, it is also discharged into the third chamber 102, allowing the temperature and humidity detection mechanism 32 to detect the temperature and humidity of the air in the third chamber 102. Once the third chamber 102 is full, subsequent air intakes compress the gas that entered the third chamber 102 first, causing the gas to finally exit from the detection body 10 through the exhaust pipe 103. The diverting groove 44 facilitates guiding air into the small hole; and never... Since the air entering the intake pipe 11 from the same connecting pipe 20 contains completely different dust and impurities, before detecting the air entering the detection body 10 from different connecting pipes 20, air needs to be continuously introduced for a period of time so that the air entering from the same connecting pipe 20 can completely fill the first chamber 100, the second chamber 101, and the third chamber 102, avoiding the influence of the air originally remaining in the first chamber 100, the second chamber 101, and the third chamber 102 on the detection results. When the dust detection mechanism 30 is working, the laser emitter 300 emits a laser and receives the laser signal through the photoelectric receiver 301. In this way, after the air completely fills the first chamber 100, the photoelectric receiver 301 receives the attenuation of the laser and the concentration of scattered dust particles.After air enters the second chamber 101, it permeates different detection boxes 310, allowing the detection reagents within the boxes to detect gaseous pollutants in the air. The detection reagents in the boxes 310 are replaced after each test. Air flowing from the first and second chambers 101 to the third chamber 102 comes into contact with the first temperature and humidity sensor 320, enabling it to continuously monitor the air and obtain stable data. This stable data represents the temperature and humidity of the air inside the detection body 10. Simultaneously, the temperature and humidity of the outside air are directly detected by the second temperature and humidity sensor 321 located on the upper outer side of the detection body 10.

[0032] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An air pollution detection device, comprising a base plate (1), a detection body (10) disposed on one side of the upper end of the base plate (1), an air inlet pipe (11) disposed at one end of the detection body (10), an air inlet assembly (2) disposed at the end of the air inlet pipe (11) away from the detection body (10), the air inlet assembly (2) disposed on the side of the upper end of the base plate (1) away from the detection body (10), and a control module disposed at the upper end of the detection body (10), characterized in that, Also includes: The detection component (3) is disposed inside the detection body (10) and electrically connected to the control module. The detection component (3) includes a dust detection mechanism (30) for detecting the concentration of particles in the air. A gaseous detection mechanism (31) is provided on one side of the dust detection mechanism (30) for detecting gaseous pollutants in the air. The dust detection mechanism (30) and the gaseous detection mechanism (31) are isolated from each other, and a temperature and humidity detection mechanism (32) is provided at the ends of both.

2. The air pollution detection device according to claim 1, characterized in that, The detection body (10) includes a first chamber (100), a second chamber (101) and a third chamber (102). The dust detection mechanism (30) is located in the first chamber (100), the gas detection mechanism (31) is located in the second chamber (101), and the temperature and humidity detection mechanism (32) is located in the third chamber (102). The first chamber (100), the second chamber (101) and the third chamber (102) are connected to each other. A one-way valve is provided between the first chamber (100), the second chamber (101) and the third chamber (102). An exhaust pipe (103) is provided at the end of the detection body (10) away from the air intake assembly (2). A one-way valve is provided on the exhaust pipe (103).

3. The air pollution detection device according to claim 1, characterized in that, The air intake assembly (2) includes two connecting pipes (20), each of which has a sampling head (21) at one end and a suction pump (22) in the middle. The end of each connecting pipe (20) away from the sampling head (21) is connected to a three-way pipe (23), which is connected to the air intake pipe (11). A conversion mechanism (24) is provided on the three-way pipe (23), and a cyclone separator (25) is provided at the end of at most one of the connecting pipes (20).

4. An air pollution detection device according to claim 3, characterized in that, The three-way pipe (23) includes two air inlets (230) and one air outlet (231). The middle cross section of the two air inlets (230) is rectangular, and the two air inlets (230) are arranged in parallel.

5. An air pollution detection device according to claim 4, characterized in that, The conversion mechanism (24) includes a switching plate (240), which is dynamically sealed between the two air intakes (230). A rack (241) is provided in the middle of the switching plate (240), and a switching motor (242) is provided at the upper end of the base plate (1). A drive gear (243) is provided at the output end of the switching motor (242), and the drive gear (243) meshes with the rack (241).

6. An air pollution detection device according to claim 5, characterized in that, The switching plate (240) is symmetrically provided with two blocking positions (2400) and two open positions (2401), and each of the two air intakes (230) is always provided with one blocking position (2400) and one open position (2401).

7. An air pollution detection device according to claim 2, characterized in that, It also includes a diversion assembly (4), which includes a baffle (40). The baffle (40) is rotatably disposed in the air intake pipe (11). A shroud (41) is provided at one end of the baffle (40) facing the air intake assembly (2). An air intake channel (104) is provided in the detection body (10). Two small holes are provided on the side of the air intake channel (104). The air intake channel (104) is connected to the first chamber (100) and the second chamber (101) through the small holes. A diversion block (42) is slidably disposed in the air intake channel (104). A buffer spring (43) is provided between the diversion block (42) and the detection body (10). A sealing ring is provided on the outside of the diversion block (42). Two diversion grooves (44) are provided at one end of the diversion block (42) away from the buffer spring (43).

8. An air pollution detection device according to claim 2, characterized in that, The dust detection mechanism (30) includes a laser emitter (300) and a photoelectric receiver (301), with the laser emitter (300) and the photoelectric receiver (301) arranged parallel to each other on the inner wall of the first chamber (100).

9. An air pollution detection device according to claim 2, characterized in that, The gaseous detection mechanism (31) includes multiple detection boxes (310), each of which contains a detection reagent.

10. An air pollution detection device according to claim 2, characterized in that, The temperature and humidity detection mechanism (32) includes a first temperature and humidity detection element (320) and a second temperature and humidity detection element (321). The first humidity detection element is disposed in the third chamber (102), and the second humidity detection element is disposed on the upper outer side of the detection body (10).

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