Indoor air quality multichannel rapid monitor

Abstract

The utility model relates to the technical field of air quality monitoring, and discloses an indoor air quality multi-channel rapid monitor, comprising: a monitoring module comprising an instrument part and a detection part, the detection part comprising a mounting box arranged at the bottom of the instrument part, a plurality of air chambers uniformly arranged at the bottom of the mounting box along the left and right, the bottom of each air chamber being open, different types of sensors are respectively arranged in the sensors; the adjusting diffusion module comprises a ventilation box, the bottom of the adjusting diffusion module is provided with a plurality of air inlet channels, the top of the adjusting diffusion module is provided with an air replacement module, all the air chambers are arranged in the ventilation box, and air in the ventilation box is subjected to standing and free diffusion in the ventilation box after being replaced by the air replacement module and is detected through a sensor; the blowback ventilation module is arranged on one side of the ventilation box and used for carrying out blowback and replacement on gas in the ventilation box, and compared with the prior art, the detection device has the advantages that detection is carried out through gas replacement and gas diffusion, and the nitrogen blowback cleaning function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of air quality monitoring technology, specifically to an indoor air quality multi-channel rapid monitoring instrument. Background Technology

[0002] With the increase in global urbanization, indoor air pollution has become an increasingly serious problem. However, modern people spend an average of about 90% of their time indoors, but the concentration of indoor air pollutants is often 2 to 5 times higher than that outdoors, and can even reach 100 times higher. Indoor air quality monitoring instruments are mainly used to detect harmful substances and environmental parameters in the air, and they demonstrate important value in risk warning, health protection, and scientific management.

[0003] When multiple indoor locations need to be monitored, pump-type indoor air quality monitors are often used. Air from the target monitoring points is drawn into the monitor through an air intake channel, and the air quality, composition, and concentration of the gas at the target point are detected by sensors. However, this method requires an air pump to keep the gas flowing, which causes the sensor detection results to be affected by airflow disturbances, resulting in certain errors and low accuracy. Furthermore, if the airflow direction remains unchanged, the gases from different channels will mix to some extent, which may even contaminate the sensors and affect the monitoring results. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide an indoor air quality multi-channel rapid monitoring instrument. It uses gas replacement to draw and replace the surrounding gas at different points in turn to the air monitoring instrument and then let it stand. Then, the gas after replacement is detected by a diffusion sensor to reduce airflow interference. It also cleans the residual gas in the device by backflushing with nitrogen at regular intervals.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A multi-channel rapid indoor air quality monitoring instrument, comprising:

[0007] The monitoring module includes an instrument section and a detection section. The detection section includes a mounting box located at the bottom of the instrument section. Multiple air chambers are evenly arranged along the left and right sides of the bottom of the mounting box. The bottom of each air chamber is open, and different types of sensors are installed inside.

[0008] The regulating diffusion module includes an air exchange box, with multiple air inlet channels at the bottom and an air replacement module at the top. Each air chamber is located in the air exchange box. After the gas in the air exchange box is replaced by the air replacement module, it is allowed to stand still and diffuse freely in the air exchange box, and the gas is detected by a sensor.

[0009] The backflush ventilation module is located on one side of the ventilation box to backflush and replace the gas inside the ventilation box.

[0010] As an improvement, the air exchange box includes an air exchange channel in the middle, a purification filter element in the air exchange channel, an air extraction chamber connected to the top, a diffusion chamber connected to the bottom, a dustproof filter element horizontally arranged in the diffusion chamber, and the top of the diffusion chamber is connected to each air chamber. Multiple air inlet valves are evenly arranged on the left and right sides of the bottom, and the other end of each air inlet valve is connected to an air inlet pipe, and the other end of each air inlet pipe is arranged at a monitoring point.

[0011] As an improvement, the air replacement module includes an air pump and an adjusting air cylinder. One end of the air pump is connected to the top of the air extraction chamber, and the other end is provided with an air outlet. A pair of adjusting air cylinders are arranged in mirror image on both sides of the air pump. After the air pump stops, the adjusting air cylinders continue to extract gas from the air exchange box.

[0012] As an improvement, the regulating cylinder includes a piston cylinder, the bottom of which is connected to the top of the suction chamber. An adjusting plate is slidably arranged inside the cylinder. A piston adapted to the piston cylinder is arranged at the bottom of the adjusting plate. A tension spring is arranged between the top of the adjusting plate and the piston cylinder. After the air pump stops, the tension spring pulls the piston upward, and the gas in the suction chamber enters the piston cylinder.

[0013] As an improvement, a wiring port is provided on one side of the instrument section, and an audible and visual alarm is provided on the other side.

[0014] As an improvement, the backflush ventilation module includes a one-way valve located on one side of the diffusion chamber, a backflush pipe located at the other end of the one-way valve, a backflush valve located on the backflush pipe, and a gas inlet pipe connected to a nitrogen gas source located at the other end.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. This utility model is equipped with an adjustable diffusion module, and through gas replacement, the surrounding air of the monitoring point is transferred to the sealed air exchange box near the monitoring module, which facilitates the diffusion sensors in each air chamber to detect the air quality of the air around the monitoring point. Furthermore, by allowing it to stand still, the flow and dynamic pressure of the detection gas can be effectively reduced, reducing the disturbance of gas flow to the sensor detection results, resulting in higher monitoring accuracy and more reliable monitoring data.

[0017] 2. This utility model is equipped with a backflush ventilation module, which can purge the ventilation box at regular intervals and replace all the gas in the ventilation box with nitrogen, preventing harmful gases from remaining in the ventilation box or on the sensor and causing pollution to the equipment. The equipment detection results are more accurate and the service life is longer.

[0018] 3. This utility model is equipped with an adjustable diffusion module and is connected to different points through multiple air intake channels. When detecting different points, the gas replacement reduces the gas residue at previous points, avoids gas mixing at different points, reduces the influence of gas quality between different points, and achieves higher accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0021] Figure 3 This is a schematic diagram showing the unfolded structure of this utility model.

[0022] Figure 4 This is a schematic diagram showing the unfolded structure of the monitoring module of this utility model.

[0023] Figure 5 This is a cross-sectional schematic diagram of the adjustable diffusion module of this utility model.

[0024] Figure 6 This is a frontal cross-sectional view of the adjustable diffusion module of this utility model.

[0025] Figure 7 This is a cross-sectional schematic diagram of the regulating air cylinder of this utility model.

[0026] As shown in the figure: 1. Monitoring module; 11. Instrument unit; 111. Rear cover; 112. Front cover; 113. Display; 114. Control chip; 12. Detection unit; 121. Mounting box; 122. Air chamber; 123. Sensor; 13. Wiring port; 14. Audible and visual alarm; 2. Adjustable diffusion module; 21. Air exchange box; 211. Diffusion chamber; 212. Extraction chamber; 213. Mounting hole; 214. Air exchange channel. ; 22. Dustproof filter element; 23. Purification filter element; 3. Air replacement module; 31. Air pump; 311. Air outlet nozzle; 32. Adjusting air cylinder; 321. Piston cylinder; 322. Adjusting plate; 323. Piston; 324. Tension spring; 4. Air intake channel; 41. Air intake valve; 42. Air intake pipe; 5. Backflush ventilation module; 51. Backflush pipe; 52. One-way valve; 53. Backflush valve; 54. Air connection pipe; 6. Pressure relief valve. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 As shown, an indoor air quality multi-channel rapid monitoring instrument includes a monitoring module 1 and an adjustment and diffusion module 2. The monitoring module 1 is installed on the adjustment and diffusion module 2, and an air replacement module 3 is provided on the top of the adjustment and diffusion module 2. Four sets of air intake channels 4 are evenly arranged on the left and right sides of the bottom (the number of air intake channels 4 can be adjusted as needed), and a back-blowing ventilation module 5 is provided on one side.

[0030] As described above, after the air in the regulating diffusion module 2 is discharged by the air replacement module 3, one of the air inlet channels 4 is opened, allowing the air at the corresponding monitoring point to enter the regulating diffusion module 2 for replacement. As the air replacement module 3 stops, the gas flow in the regulating diffusion module 2 slows down until it reaches a static state. After contacting the monitoring module 1 through free diffusion, the monitoring module 1 detects the air quality. After the detection is completed, the air replacement module 3 is restarted, and the detected gas is discharged through the air replacement module 3. Every 12 hours, the backflushing and air exchange module 5 performs a backflushing and cleaning process to completely replace the gas in the regulating diffusion module 2 with nitrogen. During the backflushing and cleaning process, the monitoring module 1 is turned off.

[0031] As attached Figure 1 Appendix Figure 2 Appendix Figure 4As shown, the monitoring module 1 includes an instrument section 11 and a detection section 12. The instrument section 11 includes a front cover 112 and a rear cover 111. The front cover 112 is closed and fixed to the front side of the rear cover 111. The front cover 112 is equipped with a display 113 and operation buttons. The rear cover 111 is equipped with a control chip 114, and has a wiring port 13 on one side and an audible and visual alarm 14 on the other side. The detection section 12 includes a mounting box 121 located at the bottom of the rear cover 111. Four air chambers 122 are evenly arranged along the left and right sides of the bottom of the mounting box 121. The bottom of each air chamber 122 is open, and different types of sensors 123 are installed inside (including CO2 concentration sensors, formaldehyde concentration sensors, oxygen concentration sensors, etc. Because the gas needs to be dusted, this device cannot measure PM value or cleanliness, so the sensor 123 does not include a PM value sensor).

[0032] As described above, the monitoring module 1 is powered through the wiring port 13. Air enters each air chamber 122 through free diffusion and comes into contact with the corresponding sensor 123. The sensor 123 detects parameters such as air composition and concentration at regular intervals and transmits the detection results to the instrument unit 11 for display. When the detected value of a certain parameter exceeds the set upper and lower limits, the audible and visual alarm 14 flashes and beeps to alert personnel.

[0033] As attached Figure 2 Appendix Figure 3 Appendix Figure 5 Appendix Figure 6 As shown, the regulating diffusion module 2 includes an air exchange box 21. A vertically arranged air exchange channel 214 is provided in the middle of the air exchange box 21. A purification filter element 23 is provided in the air exchange channel 214. An air extraction chamber 212 is connected to the top and a diffusion chamber 211 is connected to the bottom. After the top of the diffusion chamber 211 is connected to each air chamber 122, the bottom of each air chamber 122 is respectively arranged in the diffusion chamber 211. A dustproof filter element 22 is horizontally arranged in the diffusion chamber 211 below the air chamber 122 to prevent dust from directly contacting the sensor 123. Four sets of air inlet channels 4 are evenly arranged on the left and right sides of the bottom of the diffusion chamber 211, and a pressure relief valve 6 is provided. The pressure relief valve 6 has an adjustable pressure. An air replacement module 3 is provided on the top of the air extraction chamber 212, and mounting holes 213 for screw fixing are provided on the outside of the air exchange box 21.

[0034] As attached Figure 1 Appendix Figure 3 As shown, the air intake channel 4 includes an air intake valve 41 and an air intake pipe 42. The air intake valve 41 is an electric valve, one end of which is connected to the bottom of the diffusion chamber 211, and the other end is connected to the air intake pipe 42. The other end of the air intake pipe 42 is arranged at the monitoring point and is equipped with a dustproof net.

[0035] As described above, after the air replacement module 3 is turned on, the gas extraction from the air exchange box 21 decreases, creating a negative pressure. After the air replacement module 3 is turned off, one of the intake valves 41 opens. Under the negative pressure, the air around the corresponding monitoring point enters the diffusion chamber 211 through the intake pipe 42 and is filtered by the dust filter element 22. The remaining original gas in the air exchange box 21 enters the extraction chamber 212 through the air exchange channel 214 and is filtered by the purification filter element 23 (the dust filter element 22 only filters airborne dust and does not affect other air quality data; the purification filter element 23 is located in the air exchange channel 214 and mainly filters the exhaust gas). The filtration and adsorption process (which has no effect on the gas inside the diffusion chamber 211) removes harmful substances from the interior until the gas pressure inside the diffusion chamber 211 returns to normal. At this point, the gas stops entering the diffusion chamber 211 and gradually becomes still. The gas then diffuses freely into each gas chamber 122, and the air weight is detected by the sensors 123 in each gas chamber 122. This allows for an appropriate increase in the number of gas replacements at each monitoring point (each air inlet valve 41 is continuously opened and closed 2-3 times in conjunction with the air replacement module 3, after which the gas quality is detected, and then the system switches to the next monitoring point's air inlet valve 41). This makes the data more reliable.

[0036] As attached Figure 1 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 As shown, the air replacement module 3 includes an air pump 31 and an adjusting air cylinder 32. One end of the air pump 31 is connected to the top of the suction chamber 212, and the other end is provided with an air outlet 311. A pair of adjusting air cylinders 32 are mirror images of the air pump 31, including a piston cylinder 321. The bottom of the piston cylinder 321 is connected to the top of the suction chamber 212, and an adjusting plate 322 is slidably arranged inside the piston cylinder 321. A piston 323 adapted to the piston cylinder 321 is provided at the bottom of the adjusting plate 322, and a tension spring 324 is provided between the top of the adjusting plate 322 and the piston cylinder 321.

[0037] As described above, after all intake valves 41 are closed, the air pump 31 turns on, drawing gas out of the air exchange box 21. The reduced gas level in the air exchange box 21 creates a negative pressure, causing the piston 323 to move downwards within the piston cylinder 321 and stretching the tension spring 324, preventing the gas level in the air exchange box 21 from becoming too low (the movement of the piston 323 within the piston cylinder 321 replaces the deformation of the air exchange box 21). After the air pump 31 stops, the corresponding intake valve 41 opens, and the air around the corresponding monitoring point enters the diffusion chamber 211 through the intake pipe 42, reducing the gas level in the air exchange box 21. As the pressure rises, and the piston 323 moves upward within the piston cylinder 321 under the pull of the tension spring 324, some of the gas in the extraction chamber 212 is drawn into the piston cylinder 321, allowing more gas to enter the diffusion chamber 211 until the air pressure in the air exchange box 21 returns to normal. At this point, the gas stops entering the diffusion chamber 211, and the gas in the air exchange box 21 gradually becomes still, reducing the impact and interference of its own flow on the monitoring module 1. The air replacement module 3 completely replaces the air in the air exchange box 21 with the air surrounding the monitoring point through one or more extractions, facilitating detection.

[0038] As attached Figure 1 Appendix Figure 5 Appendix Figure 6 As shown, the backflush ventilation module 5 includes a one-way valve 52 disposed on one side of the diffusion chamber 211, a backflush pipe 51 disposed on the other end of the one-way valve 52, a backflush valve 53 disposed on the backflush pipe 51, and a gas inlet pipe 54 connected to a nitrogen gas source disposed on the other end. The backflush valve 53 is an electric valve.

[0039] As described above, the backflushing and air exchange module 5 is activated every 12 hours (the time can be adjusted) for backflushing and cleaning. After the air replacement module 3 extracts air, all air inlet channels 4 are closed, and the backflushing valve 53 is opened. Nitrogen enters the diffusion chamber 211 through the air inlet pipe 54 and the backflushing pipe 51 to replenish the gas in the air exchange box 21. Excess nitrogen is discharged through the pressure relief valve 6 to prevent damage to the air exchange box 21. After the backflushing valve 53 is closed, the air replacement module 3 is restarted to extract air and remove the nitrogen from the air exchange box 21. After repeating this process multiple times, the gas in the air exchange box 21 is completely replaced with nitrogen to prevent harmful gases from remaining in the air exchange box 21 and causing pollution and damage to the sensor 123 and other components. During the backflushing and cleaning process, the monitoring module 1 stops detecting.

[0040] As described above, all parts and usage methods of the monitoring module 1 in this embodiment are existing mature technologies that are well-known to the general public, and the pipes and components do not react with the detected gas.

[0041] In the specific implementation of this embodiment:

[0042] The monitoring module 1 is powered on via the wiring port 13. The air replacement module 3 is turned on intermittently to extract and discharge the gas in the air exchange box 21, creating a negative pressure inside the air exchange box 21. While the air replacement module 3 is closed, the air inlet valve 41 of one of the air inlet channels 4 is opened, allowing air from the surrounding area of ​​the corresponding monitoring point to enter the air exchange box 21. Each air chamber 122 of the detection unit 12 is exposed to the incoming air from the surrounding area of ​​the monitoring point. After the gas in the diffusion chamber 211 is replaced by the air from the surrounding area of ​​the monitoring point and tends to settle, the monitoring module 1 detects the gas quality in the diffusion chamber 211 through the sensor 123. When a certain detection value exceeds the set upper or lower limit, the audible and visual alarm 14 flashes and sounds to alert personnel, and the instrument unit 11 records the data. After the detection is completed, the air replacement module 3 is turned on again to extract and discharge the gas in the air exchange box 21 and replace it with the air from the surrounding area of ​​the next monitoring point for air quality detection.

[0043] Every 12 hours, a backflushing cleaning is performed through the backflushing ventilation module 5 to completely replace the gas in the regulating diffusion module 2 with nitrogen, diluting and discharging residual harmful gases. During the backflushing cleaning process, the monitoring module 1 is shut down to prevent false alarms.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-channel rapid indoor air quality monitoring instrument, characterized in that, include: The monitoring module (1) includes an instrument section (11) and a detection section (12). The detection section (12) includes a mounting box (121) located at the bottom of the instrument section (11). Multiple air chambers (122) are evenly arranged along the left and right sides at the bottom of the mounting box (121). The bottom of each air chamber (122) is open, and different types of sensors (123) are installed inside. The regulating diffusion module (2) includes an air exchange box (21), with multiple air inlet channels (4) at the bottom and an air replacement module (3) at the top. Each air chamber (122) is located in the air exchange box (21). After the gas in the air exchange box (21) is replaced by the air replacement module (3), it is placed in the air exchange box (21) and diffuses freely. The gas is detected by the sensor (123). The backflush ventilation module (5) is set on one side of the ventilation box (21) to backflush and replace the gas in the ventilation box (21).

2. The multi-channel rapid indoor air quality monitoring instrument according to claim 1, characterized in that: The air exchange box (21) includes an air exchange channel (214) in the middle, a purification filter (23) in the air exchange channel (214), an air extraction chamber (212) connected to the top, a diffusion chamber (211) connected to the bottom, a dustproof filter (22) horizontally arranged in the diffusion chamber (211), and the top is connected to each air chamber (122). Multiple air inlet valves (41) are evenly arranged along the left and right sides of the bottom. The other end of each air inlet valve (41) is connected to an air inlet pipe (42), and the other end of the air inlet pipe (42) is arranged at a monitoring point.

3. The multi-channel rapid indoor air quality monitoring instrument according to claim 2, characterized in that: The air replacement module (3) includes an air pump (31) and an adjusting air cylinder (32). One end of the air pump (31) is connected to the top of the air extraction chamber (212), and the other end is provided with an air outlet (311). A pair of adjusting air cylinders (32) are mirrored on both sides of the air pump (31). After the air pump (31) stops, the adjusting air cylinders (32) continue to extract the gas in the air exchange box (21).

4. The multi-channel rapid indoor air quality monitoring instrument according to claim 3, characterized in that: The regulating cylinder (32) includes a piston cylinder (321), the bottom of which is connected to the top of the suction chamber (212), and an adjusting plate (322) is slidably arranged inside. A piston (323) adapted to the piston cylinder (321) is arranged at the bottom of the adjusting plate (322), and a tension spring (324) is arranged between the top of the adjusting plate (322) and the piston cylinder (321).

5. The multi-channel rapid indoor air quality monitoring instrument according to claim 1, characterized in that: The instrument section (11) has a wiring port (13) on one side and an audible and visual alarm (14) on the other side.

6. The multi-channel rapid indoor air quality monitoring instrument according to claim 1, characterized in that: The backflush ventilation module (5) includes a one-way valve (52) on one side of the diffusion chamber (211), a backflush pipe (51) on the other end of the one-way valve (52), a backflush valve (53) on the backflush pipe (51), and an air inlet pipe (54) connected to the air source on the other end. A pressure relief valve (6) is provided at the bottom of the ventilation box (21).

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