Miniaturized air quality monitoring system

Abstract

The invention discloses a miniaturized air quality monitoring system, belongs to the technical field of air quality monitoring, and solves the problems that preparation for air quality monitoring 12 hours in advance is relatively troublesome, or the specified closing duration of a room cannot be reached before air monitoring. Comprising an active data module, an indoor and outdoor environment acquisition module, an air quality acquisition module and a data processing module, and the output ends of the active data module, the indoor and outdoor environment acquisition module and the air quality acquisition module are coupled with the input end of the data processing module; the active data module is used for manually inputting room data and feeding back to the data processing module, the indoor and outdoor environment acquisition module is used for acquiring indoor and outdoor environment variables and feeding back to the data processing module, and the air quality acquisition module is used for acquiring pollutant concentration in indoor air and feeding back to the data processing module. Through multiple times of interval monitoring in a short time, the pollution condition of a long-time closed room is simulated, the air quality is rapidly evaluated, and labor and troubles are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air quality monitoring, and in particular to a miniaturized air quality monitoring system. Background Art

[0002] Air quality monitoring is a technique for assessing indoor air quality that involves sampling and analyzing pollutants in indoor air to determine whether there are substances that are harmful to human health. Monitoring usually includes measuring the concentration of harmful substances such as formaldehyde, benzene, total volatile organic compounds (TVOCs), and ammonia. These pollutants may come from furniture, decoration materials, tobacco smoke, or indoor and outdoor air pollution. Through regular monitoring, it is possible to evaluate whether indoor air quality meets health standards and take necessary measures to improve air quality. Monitoring results help identify pollution sources, evaluate ventilation efficiency, and provide a scientific basis for indoor air pollution control.

[0003] Air quality monitoring usually follows a series of standardized steps to ensure the accuracy and reliability of the results. First, select the appropriate monitoring instrument and prepare the corresponding sampling equipment according to the monitoring objectives. Next, determine the sampling point, which is usually based on the layout of the room and the location of the pollution source. Then, collect air samples within the specified time, avoiding interference from external pollution during this process. After sampling, the samples are analyzed in the laboratory, and the concentration of pollutants is determined using techniques such as chromatography and spectroscopy. Finally, the monitoring results are compared with the national or regional air quality standards to evaluate the air quality and make suggestions for improvement. This process requires professional operation to ensure the scientificity and validity of the data.

[0004] Due to the professional requirements of air quality monitoring itself, most ordinary people tend to choose to contact a monitoring company to monitor the air quality of each room in the house. However, whether it is a monitoring company or a self-monitoring, the room needs to be closed for a certain period of time before air quality monitoring. The "Code for Indoor Environmental Pollution Control of Civil Building Engineering" GB50325-2020 stipulates that for naturally ventilated civil building projects, the room needs to be closed for at least 1 hour. For renovated family homes that are ready to move in or have been moved in, the room needs to be closed for 12-20 hours, which is the normal sleeping time for humans.

[0005] Therefore, for most people, it is relatively troublesome to prepare for air quality monitoring 12 hours in advance, or the prescribed room closure time cannot be achieved before air monitoring. Therefore, it is hoped to find an air quality monitoring system that can complete the monitoring of the air quality in the room in a relatively short time.

[0006] Therefore, a miniaturized air quality monitoring system is proposed to solve or alleviate the above problems. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a miniaturized air quality monitoring system.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A miniaturized air quality monitoring system comprises an active data module, an indoor and outdoor environment acquisition module, an air quality acquisition module, and a data processing module, wherein the output ends of the active data module, the indoor and outdoor environment acquisition module, and the air quality acquisition module are all coupled to the input end of the data processing module;

[0010] The active data module is used to manually input room data and feed back to the data processing module, the indoor and outdoor environment acquisition module is used to collect indoor and outdoor environmental variables and feed back to the data processing module, the air quality acquisition module is used to collect pollutant concentrations in indoor air and feed back to the data processing module, and the data processing module is used to combine feedback data and variables to simulate an indoor closed 12h environment.

[0011] Preferably, the active data module is used to manually input room data and feed it back to the data processing module, including the following steps:

[0012] Manually collect room data, wherein the room data includes room volume, window ventilation area, and window direction;

[0013] Manually input room data through the active data module;

[0014] The room data is passed to the data processing module.

[0015] Preferably, the indoor and outdoor environmental variables include outdoor wind speed, outdoor wind direction, and indoor and outdoor wind pressure difference.

[0016] Preferably, the air quality acquisition module is used to collect the pollutant concentration in the indoor air and feed it back to the data processing module, including the following steps:

[0017] The air quality collection module collects the concentration of pollutants in the indoor air at the intersection of the indoor diagonals and at a height of 0.5-1.7 meters above the ground;

[0018] The air quality collection module collects the pollutant concentration in the indoor air multiple times, and the time interval Δt of each collection is 0.25-0.5h, and the pollutant concentration C(t n ).

[0019] Preferably, the data processing module is used to combine the feedback data and variables to simulate the indoor closed 12h environment, including the following steps:

[0020] According to the window direction θ window 、Outdoor wind directionθ wind , Window ventilation area A window Calculate the effective ventilation area A of the window effective ;

[0021] According to the indoor and outdoor wind pressure difference ΔP, outdoor wind speed v out Calculate the wind speed v inside the window by formula 1 in ;

[0022] Based on the wind speed v inside the window in , Window effective ventilation area A effective , and the room volume V room Determine the air exchange rate of the room using formula 2.

[0023] Preferably, the calculating of the effective ventilation area of ​​the window according to the window direction, the outdoor wind direction and the window ventilation area comprises the following steps:

[0024] Calculate outdoor wind direction θ wind With the window direction θ window The angle θ between relative =|θ wind -θ window |;

[0025] Set the outdoor wind direction to θ wind With the window direction θ window The angle θ between relative Limited to between 0° and 180°, θ relativ e=min(θ relative ,180°-θ relative );

[0026] Combination angle θ relative Ventilation area with windows A window Get the effective ventilation area A of the window effective =A window ·cos(θ relative ), when the outdoor wind direction is parallel to the window direction, A effective =A window , when the outdoor wind direction is perpendicular to the window direction, A effective =0.

[0027] Preferably, the formula 1 includes the wind speed inside the window Where ρ is the air density, and the formula 2 includes the air exchange rate Among them, C d is the wind pressure coefficient, usually taken as 0.6.

[0028] Preferably, the data processing module is used to combine the feedback data and variables to simulate the indoor closed 12h environment, and also includes the following steps:

[0029] According to the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Find the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room;

[0030] When the room is closed, there are gaps between doors and windows for ventilation, and the minimum air exchange rate is set to 0.1;

[0031] The minimum air exchange rate and pollutant concentration C(t n ), room volume V room , pollutant release rate R and natural attenuation coefficient λ of pollutants are introduced into formula 3 to estimate the simulated pollutant concentration after the indoor environment is closed for 12 hours.

[0032] Preferably, the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Finding the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room includes the following steps:

[0033] Initially, the natural attenuation coefficient λ of the pollutant is set to 0, and the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Formula 4 is introduced to find the pollutant release rate R in the room. The formula 4 is

[0034] Remove the setting of the natural attenuation coefficient λ of pollutants to 0, and match the pollutant concentration C(t n ), air exchange rate ARE, room volume V room , the pollutant release rate R is introduced into formula 5 to find the natural attenuation coefficient λ of the pollutant, and the formula 5 includes

[0035] Preferably, the formula 3 is the simulated pollutant concentration

[0036] The present invention has the following beneficial effects:

[0037] When the present invention detects the concentration of pollutants in a room, there is no need to close the windows and doors of the room for at least 12 hours in advance. Instead, multiple interval monitoring can be performed within a certain period of time to simulate the air pollution conditions that may occur after the room is closed for at least 12 hours. The present invention can use the shortest possible time to complete the monitoring of the air quality in the room, so that people can have a relative understanding of the air quality of the monitored room, reduce the labor required for people to monitor the air quality in the room, and reduce the degree of trouble. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a structural block diagram of the present invention.

[0040] 1. Active data module; 2. Indoor and outdoor environment collection module; 3. Air quality collection module; 4. Data processing module. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] A miniaturized air quality monitoring system, such as Figure 1 As shown, it includes an active data module 1, an indoor and outdoor environment acquisition module 2, an air quality acquisition module 3, and a data processing module 4, and the output ends of the active data module 1, the indoor and outdoor environment acquisition module 2, and the air quality acquisition module 3 are all coupled to the input end of the data processing module 4;

[0048] The active data module 1 is used to manually input room data and feed it back to the data processing module 4. The indoor and outdoor environment acquisition module 2 is used to collect indoor and outdoor environmental variables and feed them back to the data processing module 4. The air quality acquisition module 3 is used to collect the pollutant concentration in the indoor air and feed it back to the data processing module 4. The data processing module 4 is used to combine the feedback data and variables to simulate the indoor closed 12h environment.

[0049] Preferably, the active data module 1 is used to manually input room data and feed it back to the data processing module 4, including the following steps:

[0050] Manually collect room data, including room volume, window ventilation area, and window direction;

[0051] Manually input room data through active data module 1;

[0052] The room data is transmitted to the data processing module 4 .

[0053] Preferably, the indoor and outdoor environmental variables include outdoor wind speed, outdoor wind direction, and indoor and outdoor wind pressure difference.

[0054] Preferably, the air quality collection module 3 is used to collect the pollutant concentration in the indoor air and feed it back to the data processing module 4, including the following steps:

[0055] The air quality collection module 3 collects the pollutant concentration in the indoor air at the intersection of the indoor diagonals and at a height of 0.5-1.7 meters above the ground;

[0056] The air quality collection module 3 collects the pollutant concentration in the indoor air for multiple times, and the time interval Δt of each collection is 0.25-0.5h, and the pollutant concentration C(tn ).

[0057] Data collection is performed by the above method, thereby ensuring that the pollutant concentration in the indoor air collected by the air quality collection module 3 is relatively accurate, and ensuring that the air quality collection module 3 is located in the middle of the room.

[0058] Preferably, the data processing module 4 is used to combine the feedback data and variables to simulate the indoor closed 12h environment, including the following steps:

[0059] According to the window direction θ window 、Outdoor wind directionθ wind , Window ventilation area A window Calculate the effective ventilation area A of the window effective ;

[0060] According to the indoor and outdoor wind pressure difference ΔP, outdoor wind speed v out Calculate the wind speed v inside the window by formula 1 in , Formula 1 includes the wind speed inside the window Where ρ is the air density;

[0061] Based on the wind speed v inside the window in , Window effective ventilation area A effective , and the room volume V room The air exchange rate of the room is determined by formula 2, which includes the air exchange rate Among them, C d is the wind pressure coefficient, usually taken as 0.6.

[0062] Preferably, calculating the effective ventilation area of ​​the window according to the window direction, outdoor wind direction, and the window ventilation area comprises the following steps:

[0063] Calculate outdoor wind direction θ wind With the window direction θ window The angle θ between relative =|θ wind -θ window |;

[0064] Set the outdoor wind direction to θ wind With the window direction θ window The angle θ between relative Limited to between 0° and 180°, θ relative =min(θ relative ,180°-θ relative );

[0065] Combination angle θ relative Ventilation area with windows A window Get the effective ventilation area A of the window effective =A window·cos(θ relative ), when the outdoor wind direction is parallel to the window direction, A effective =A window , when the outdoor wind direction is perpendicular to the window direction, A effective =0.

[0066] Preferably, the data processing module 4 is used to combine the feedback data and variables to simulate the indoor closed 12h environment, and also includes the following steps:

[0067] According to the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Find the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room;

[0068] When the room is closed, there are gaps between doors and windows for ventilation, and the minimum air exchange rate is set to 0.1;

[0069] The minimum air exchange rate and pollutant concentration C(t n ), room volume V room , the pollutant release rate R and the natural attenuation coefficient λ of the pollutants are introduced into formula 3 to estimate the simulated pollutant concentration after the indoor closure for 12 hours. Formula 3 is the simulated pollutant concentration

[0070] Preferably, according to the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Finding the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room includes the following steps:

[0071] Initially, the natural attenuation coefficient λ of the pollutant is set to 0, and the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Import formula 4 to find the pollutant release rate R in the room. Formula 4 is

[0072] Compared with the air exchange rate, the natural attenuation coefficient of pollutants has a much lower effect on pollutant concentration than the air exchange rate. Therefore, when looking for the pollutant release rate in the room at the beginning, the natural attenuation coefficient of pollutants is ignored, that is, set to 0, in order to roughly confirm the pollutant release rate.

[0073] Remove the setting of the natural attenuation coefficient λ of pollutants to 0, and match the pollutant concentration C(t n ), air exchange rate ARE, room volume V room, the pollutant release rate R is introduced into formula 5 to find the natural attenuation coefficient λ of the pollutant. Formula 5 includes

[0074] After confirming the approximate pollutant release rate, remove the setting of the natural attenuation coefficient λ of the pollutant to 0, replace the pollutant concentration, and use another pollutant concentration. In this way, the natural attenuation coefficient of the pollutant can be calculated using the above method, thereby facilitating the calculation of simulated pollutant concentrations.

[0075] In summary, the present invention provides an efficient room air quality monitoring system, which allows us to simulate the air pollution condition of the room after being closed for 12 hours by performing multiple interval monitoring within a certain period of time without closing the doors and windows of the room. This method can complete the air quality detection in a short time and quickly provide people with relative information on the air quality in the room. In this way, we not only reduce the labor intensity in the monitoring process, but also reduce the complexity of the operation. Users can have a general understanding of the air quality of the room without waiting for a long time, so as to more conveniently evaluate and improve the living environment.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A miniaturized air quality monitoring system, characterized in that: It comprises an active data module (1), an indoor and outdoor environment collection module (2), an air quality collection module (3), and a data processing module (4), wherein the output ends of the active data module (1), the indoor and outdoor environment collection module (2), and the air quality collection module (3) are all coupled to the input end of the data processing module (4); The active data module (1) is used to manually input room data and feed it back to the data processing module (4); the indoor and outdoor environment acquisition module (2) is used to collect indoor and outdoor environmental variables and feed it back to the data processing module (4); the air quality acquisition module (3) is used to collect pollutant concentrations in indoor air and feed it back to the data processing module (4); and the data processing module (4) is used to simulate an indoor closed 12-hour environment by combining the feedback data and variables.

2. A miniaturized air quality monitoring system according to claim 1, characterized in that: The active data module (1) is used to manually input room data and feed it back to the data processing module (4), and comprises the following steps: Manually collect room data, wherein the room data includes room volume, window ventilation area, and window direction; Manually input room data through the active data module (1); The room data is transmitted to the data processing module (4).

3. A miniaturized air quality monitoring system according to claim 2, characterized in that: The indoor and outdoor environmental variables include outdoor wind speed, outdoor wind direction, and indoor and outdoor wind pressure difference.

4. A miniaturized air quality monitoring system according to claim 3, characterized in that: The air quality collection module (3) is used to collect the pollutant concentration in the indoor air and feed it back to the data processing module (4), and comprises the following steps: The air quality collection module (3) collects the concentration of pollutants in the indoor air at the intersection of the diagonals in the room and at a height of 0.5-1.7 meters above the ground; The air quality collection module (3) collects the pollutant concentration in the indoor air for multiple times, and the time interval Δt of each collection is 0.25-0.5h, and the pollutant concentration C(t n ).

5. A miniaturized air quality monitoring system according to claim 4, characterized in that: The data processing module (4) is used to combine the feedback data and variables to simulate a closed indoor environment for 12 hours, and comprises the following steps: According to the window direction θ window 、Outdoor wind directionθ wind , Window ventilation area A window Calculate the effective ventilation area A of the window effective ; According to the indoor and outdoor wind pressure difference ΔP, outdoor wind speed v out Calculate the wind speed v inside the window by formula 1 in ; Based on the wind speed v inside the window in , Window effective ventilation area A effective , and the room volume V room Determine the air exchange rate of the room using formula 2.

6. A miniaturized air quality monitoring system according to claim 5, characterized in that: The method of calculating the effective ventilation area of ​​the window according to the window direction, outdoor wind direction and the window ventilation area comprises the following steps: Calculate outdoor wind direction θ wind With the window direction θ window The angle θ between relative =|θ wind -θ window |; Set the outdoor wind direction to θ wind With the window direction θ window The angle θ between relative Limited to between 0° and 180°, θ relative =min(θ relative ,180°-θ relative ); Combination angle θ relative Ventilation area with windows A window Get the effective ventilation area A of the window effective =A window ·cos(θ relative ), when the outdoor wind direction is parallel to the window direction, A effective =A window , when the outdoor wind direction is perpendicular to the window direction, A effective =0.

7. A miniaturized air quality monitoring system according to claim 5, characterized in that: Formula 1 includes the wind speed inside the window Where ρ is the air density, and the formula 2 includes the air exchange rate Among them, C d is the wind pressure coefficient, usually taken as 0.

6.

8. A miniaturized air quality monitoring system according to claim 7, characterized in that: The data processing module (4) is used to combine the feedback data and variables to simulate the indoor closed 12-hour environment, and also includes the following steps: According to the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Find the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room; When the room is closed, there are gaps between doors and windows for ventilation, and the minimum air exchange rate is set to 0.1; The minimum air exchange rate and pollutant concentration C(t n ), room volume V room , pollutant release rate R and natural attenuation coefficient λ of pollutants are introduced into formula 3 to estimate the simulated pollutant concentration after the room is closed for 12 hours.

9. A miniaturized air quality monitoring system according to claim 8, characterized in that: According to the pollutant concentration C(t n ), air exchange rate ARE, room volume V room Finding the pollutant release rate R and the natural attenuation coefficient λ of the pollutants in the room includes the following steps: Initially, the natural attenuation coefficient λ of the pollutant is set to 0, and the pollutant concentration C ( t n) , air exchange rate ARE, room volume V room Formula 4 is introduced to find the pollutant release rate R in the room. The formula 4 is Remove the setting of the natural attenuation coefficient λ of pollutants to 0, and match the pollutant concentration C(t n ), air exchange rate ARE, room volume V room , the pollutant release rate R is introduced into formula 5 to find the natural attenuation coefficient λ of the pollutant, and the formula 5 includes 10. A miniaturized air quality monitoring system according to claim 9, characterized in that: Formula 3 is the simulated pollutant concentration

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