Ultra large flow aerosol sampler

Abstract

The utility model provides a super large flow aerosol sampler relates to sampling equipment technical field, including box, filter paper support, lid, sealing positioning structure and fan, wherein, the top opening of box is set up, filter paper support installs in the outside of the top opening of box, a plurality of filter paper supports are installed on filter paper support, a plurality of through -holes are arranged on filter paper support, lid is hinged with filter paper support, and the aerosol air inlet is seted up on every side wall of lid, sealing positioning structure is seted up between lid and filter paper support, and sealing positioning structure is used for sealing fixed filter paper and with lid and filter paper support positioning, the inside of box is installed with fan, and fan is communicated with one end of air duct, and the other end of air duct is communicated with the box gas outlet, and the outside of box gas outlet is installed with flowmeter, and the connecting flange is installed on flowmeter. The utility model can sample the aerosol in the environment, improve the airflow and sampling efficiency, and the structure is simplified, the weight is reduced, and it is easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, and in particular to an ultra-high flow rate aerosol sampler. Background Technology

[0002] Aerosols are complex multiphase systems formed by the dispersion and suspension of solid or liquid microparticles in a gaseous medium, where the gas is the continuous phase and the particulate matter is the dispersed phase. These particles range widely in size, from a few nanometers to hundreds of micrometers, and their chemical compositions vary considerably. In the natural environment, sea salt, dust, volcanic ash, and plant pollen are common sources of aerosols; while in areas with human activity, industrial emissions, vehicle exhaust, construction, and biomass burning generate large amounts of anthropogenic aerosols. Due to their stable suspension characteristics, aerosols can be transported over long distances with atmospheric circulation, making them a pollutant with regional and even global impacts. Systematic sampling and analysis of aerosols is a crucial aspect of environmental science.

[0003] Aerosols pose multifaceted threats to human society and the natural environment. The most direct threat is to human health, especially fine particulate matter (PM2.5) with an aerodynamic diameter of less than 2.5 micrometers. PM2.5 can penetrate the respiratory system's protective barrier, directly entering the alveoli and potentially spreading into the bloodstream, triggering asthma, bronchitis, cardiovascular disease, and even lung cancer. At the environmental level, aerosols are a major culprit in causing smog and significantly reducing atmospheric visibility, severely impacting transportation and urban landscapes. Furthermore, aerosols exert complex cooling or warming effects on the global climate system by directly scattering and absorbing solar radiation, or by acting as condensation nuclei to influence cloud characteristics and lifespan, disrupting normal precipitation patterns and becoming one of the greatest uncertainties in climate change research.

[0004] Given the widespread hazards of aerosols, their accurate collection and analysis are crucial. The core purpose of aerosol collection is to obtain key information such as their mass concentration, chemical composition, and particle size distribution in ambient air. This process forms the basis for ambient air quality assessment, pollution source tracing, and health risk assessment. By analyzing collected particulate matter samples, research and regulatory agencies can determine the main pollutant types in specific areas and identify their source contributions (such as from coal combustion, dust, or motor vehicles), thereby providing a scientific basis for developing precise and effective pollution prevention and control policies. Simultaneously, long-term, systematic sample accumulation also contributes to the study of the climatic and environmental effects of aerosols and their evolutionary patterns.

[0005] Aerosol collection typically relies on specialized equipment: aerosol samplers. Their basic working principle involves using suction power (such as a fan) to force a certain volume of air through a collection medium (most commonly a filter membrane) at a set flow rate. Particulate matter in the air is trapped on the surface of the medium, while the gas passes through smoothly, thus achieving gas-solid / gas-liquid separation. Traditional samplers often employ a complex "box-within-a-box" structure to achieve this airflow path, where a separate, sealed sampling chamber is located within the main box and connected by internal air ducts. This results in bulky, heavy, inconvenient-to-transport, and difficult-to-maintain equipment. Therefore, the industry urgently needs to develop new sampling devices with simpler structures that are easier to move and operate to meet the complex and diverse field sampling needs. Utility Model Content

[0006] In view of this, the technical problem to be solved by this utility model is to provide an ultra-high flow rate aerosol sampler that can sample aerosols in the environment, improve airflow and sampling efficiency; moreover, it simplifies the structure, reduces weight, and is easy to maintain.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] Ultra-high flow rate aerosol sampler, including:

[0009] The box body has an opening at the top;

[0010] A filter paper holder is installed on the outside of the top opening of the housing. Several filter paper supports are installed on the filter paper holder, and several vertical through holes are provided on the filter paper supports.

[0011] The cover is hinged to the filter paper support, and each side wall of the cover is provided with an aerosol air inlet, which is connected to the inner cavity of the box through the vertical through hole;

[0012] A sealing and positioning structure is disposed between the cover and the filter paper support, and the sealing and positioning structure is used to seal and fix the filter paper and to position the cover and the filter paper support.

[0013] A fan is installed inside the housing. The exhaust port of the fan is connected to one end of a duct. The duct is horizontally positioned at the center of the housing. The other end of the duct is connected to an air outlet on the housing. A flow meter is installed on the outside of the air outlet, and a connecting flange is installed on the flow meter.

[0014] Preferably, the sealing positioning structure includes a sealing assembly, which includes a conformal pressure ring and a plurality of elastic pressure rods adapted thereto;

[0015] The conformal pressure ring is installed on the filter paper support for pressing the filter paper. The elastic pressure rod is installed on the cover. After the cover is pressed onto the filter paper support, the elastic pressure rod vertically and elastically abuts against the conformal pressure ring.

[0016] Preferably, a deformable element is installed at the bottom end of the elastic pressure bar.

[0017] Preferably, the sealing positioning structure includes at least one positioning component, which is disposed on the side away from the hinge point between the cover and the filter paper holder;

[0018] The positioning component includes a positioning pin and a corresponding positioning hole. The positioning pin is mounted on the filter paper holder, and the positioning hole is located on the cover.

[0019] Preferably, the aerosol inlet is provided with an inlet guide slope, which is inclined from the outside to the inside along the inlet direction toward the side away from the filter paper support.

[0020] Preferably, there are two fans, and the two fans are connected to the same end of the air duct.

[0021] Preferably, a control device is installed inside the enclosure, which is electrically connected to the fan and the flow meter respectively, and the control device is located close to the fan; the side wall of the enclosure is provided with control buttons, power sockets, fuse holders, alarm indicator lights and ambient temperature and humidity probes, which are electrically connected to the control device respectively.

[0022] Preferably, the side walls of the housing are provided with reinforcing ribs.

[0023] Preferably, a telescopic rod is installed at the bottom of the box, and omnidirectional wheels are installed on one side wall of the box.

[0024] Preferably, an exhaust pipe is installed on the connecting flange.

[0025] After adopting the above technical solution, the beneficial effects of this utility model are:

[0026] The ultra-high flow rate aerosol sampler of this application includes a housing, a filter paper support, a cover, a sealing and positioning structure, and a fan. The housing has an opening at the top. The filter paper support is installed outside the opening at the top of the housing, and several filter paper supports are mounted on the support, with several vertical through holes on each support. The cover is hinged to the filter paper support, and each side wall of the cover has an aerosol inlet, which communicates with the inner cavity of the housing through the vertical through holes. The sealing and positioning structure is located between the cover and the filter paper support, and is used to seal and fix the filter paper and position the cover and the filter paper support. The fan is installed inside the housing, and its exhaust port is connected to one end of a duct. The duct is horizontally positioned at the center of the housing, and the other end of the duct is connected to a housing outlet. A flow meter is installed outside the housing outlet, and a connecting flange is mounted on the flow meter.

[0027] During sampling, the filter paper is pressed firmly onto the filter paper support by a sealed positioning structure. After the internal fan is started, a stable negative pressure is formed inside the chamber, driving ambient gas to be evenly drawn in through the aerosol inlets on the side walls of the cover. The gas then penetrates the filter paper from top to bottom, efficiently trapping particulate matter. The purified air then enters the chamber cavity and is discharged by the fan. In this process, firstly, the elimination of a separate sealed sampling chamber and internal air duct greatly simplifies the equipment structure, achieving overall lightweight and compact design, facilitating handling and deployment. Secondly, the airflow enters directly into the open chamber space after being drawn in from the side to the top filter paper, with a smooth path and low resistance, thus achieving a large flow rate while effectively reducing fan energy consumption and operating noise.

[0028] Each side wall of the cover has an aerosol inlet, which, combined with the negative pressure inside the chamber, enables 360-degree omnidirectional sampling, avoiding sampling dead zones and making the collected samples more representative of the environment. The sealing and positioning structure ensures that the filter paper is reliably compressed and sealed to prevent air leakage, while also making the operation of filling and replacing the filter paper simple and quick. The efficient cooperation between the horizontally positioned air duct and the fan in the center of the chamber ensures a stable flow field and high extraction efficiency. The flow meter at the exhaust port monitors and provides feedback on the flow rate in real time, ensuring that the sampling process meets the specifications. In summary, this application, with its concise and efficient structure, simultaneously solves many pain points of traditional equipment, such as bulkiness, complexity, high energy consumption, and inconvenient maintenance, providing a stable, reliable, and user-friendly ultra-high flow aerosol sampler. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the structure of the ultra-high flow aerosol sampler after the cover is opened according to an embodiment of this utility model;

[0031] Figure 2 yes Figure 1Enlarged view of part A

[0032] Figure 3 yes Figure 1 Enlarged view of part B;

[0033] Figure 4 This is a schematic diagram of the structure of the ultra-high flow aerosol sampler after the cover is closed according to an embodiment of this utility model;

[0034] Figure 5 yes Figure 4 Internal structure diagram;

[0035] Figure 6 yes Figure 5 Enlarged view of part C;

[0036] In the picture:

[0037] 1. Box body; 11. Reinforcing ribs; 12. Telescopic tie rod; 13. Universal casters;

[0038] 2. Filter paper holder; 21. Filter paper support; 22. Vertical through hole;

[0039] 3. Cover; 31. Aerosol inlet; 32. Inlet guide ramp;

[0040] 4. Sealing and positioning structure; 41. Sealing assembly; 42. Conformal pressure ring; 43. Elastic pressure rod; 431. Deformable element; 44. Positioning assembly; 45. Positioning pin; 46. Positioning hole;

[0041] 5. Fan; 51. Air duct;

[0042] 6. Flow meter; 61. Connecting flange;

[0043] 7. Control device. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0045] like Figures 1 to 6As shown, this utility model includes a housing 1, a filter paper support 2, a cover 3, a sealing and positioning structure 4, and a fan 5. The housing 1 has an opening at the top. The filter paper support 2 is installed outside the opening at the top of the housing 1, and several filter paper supports 21 are mounted on the filter paper support 2, each with several vertical through holes 22. The cover 3 is hinged to the filter paper support 2, and each side wall of the cover 3 has an aerosol inlet 31, which communicates with the inner cavity of the housing 1 through the vertical through holes 22. The sealing and positioning structure 4 is... Between the cover 3 and the filter paper holder 2, a sealing and positioning structure 4 is used to seal and fix the filter paper and position the cover 3 and the filter paper holder 2. A blower 5 is installed inside the housing 1, and the exhaust port of the blower 5 is connected to one end of the air duct 51. Preferably, there are two blowers 5, and both blowers 5 are connected to the same end of the air duct 51. The air duct 51 is horizontally positioned at the center of the housing 1, and the other end of the air duct 51 is connected to the housing outlet on the housing 1. A flow meter 6 is installed on the outside of the housing outlet, and a connecting flange 61 is installed on the flow meter 6. Preferably, the flow meter 6 is installed on the housing 1 via a quick-release clip, and the connecting flange 61 is installed on the flow meter 6 via a quick-release clip for easy disassembly.

[0046] During sampling, the filter paper is pressed firmly onto the filter paper support 2 by the sealing and positioning structure 4. After the internal fan 5 is started, a stable negative pressure is formed inside the chamber 1, driving ambient gas to be evenly drawn in from the aerosol inlets 31 on the side walls of the cover 3. The gas then penetrates the filter paper from top to bottom, efficiently trapping particulate matter. The purified air then enters the cavity of the chamber 1 and is discharged by the fan 5. In this process, firstly, the elimination of the separate sealed sampling chamber and internal air duct 51 greatly simplifies the equipment structure, achieving overall lightweight and compact design, facilitating transportation and deployment. Secondly, the airflow enters directly into the open space of the chamber 1 after entering the side filter paper, with a smooth path and low resistance, thus achieving a large flow rate while effectively reducing the energy consumption and operating noise of the fan 5.

[0047] Each side wall of the cover 3 has an aerosol inlet 31, which, combined with the negative pressure inside the chamber, enables 360-degree omnidirectional sampling, avoiding sampling dead zones and making the collected samples more representative of the environment. The sealing and positioning structure 4 ensures that the filter paper is reliably compressed and sealed to prevent air leakage, while also making the operation of filling and replacing the filter paper simple and quick. The efficient cooperation between the horizontally positioned air duct 51 and the fan 5 at the center of the chamber 1 ensures a stable flow field and high extraction efficiency. The flow meter 6 at the exhaust port monitors and provides feedback on the flow rate in real time, ensuring that the sampling process meets the specifications. In summary, this application, with its concise and efficient structure, simultaneously solves many pain points of traditional equipment, such as bulkiness, complexity, high energy consumption, and inconvenient maintenance, providing a stable, reliable, and user-friendly ultra-high flow aerosol sampler.

[0048] Preferably, the sealing and positioning structure 4 includes a sealing component 41, which includes a conformal pressure ring 42 and several elastic pressure rods 43 adapted thereto. The conformal pressure ring 42 is mounted on the filter paper support 2 to press the filter paper, and the elastic pressure rods 43 are mounted on the cover 3. After the cover 3 is pressed against the filter paper support 2, the elastic pressure rods 43 vertically and elastically abut against the conformal pressure ring 42. This structure firstly ensures excellent sealing reliability; its dynamic adaptive pressure automatically compensates for uneven filter paper thickness or structural tolerances, ensuring uniform distribution of clamping force and effectively preventing localized leakage. Secondly, this structure greatly simplifies operation; users only need to open and close the cover 3 to tighten or loosen the filter paper, making the operation process efficient and convenient. Furthermore, the elastic clamping method reduces the risk of mechanical damage to the filter paper, protecting the integrity of the filter paper and its supporting structure, thereby improving the durability and reliability of the equipment.

[0049] A deformable element 431 is installed at the bottom end of the elastic pressure rod 43. The deformable element 431 is made of elastic material and has an inverted trapezoidal cross-section. As a flexible intermediate medium, the deformable element 431 can more precisely fill and adapt to the microscopic unevenness of the conformal pressure ring 42 surface, effectively eliminating potential leakage gaps. Secondly, the elastic contact method avoids direct rigid collision and friction between the metal elastic pressure rod 43 and the conformal pressure ring 42, which not only reduces operating noise but also reduces wear on the contact surfaces of both parties. In addition, the excellent buffering characteristics also reduce the risk of impact damage to the filter paper holder 2 or filter paper due to improper operation (such as closing the cover too quickly), making the equipment more durable and reliable.

[0050] The sealing and positioning structure 4 includes at least one positioning component 44. Preferably, there are two sets of positioning components 44, which are located on the side away from the hinge point between the cover 3 and the filter paper support 2. Each positioning component 44 includes a positioning pin 45 and a matching positioning hole 46. The positioning pin 45 is mounted on the filter paper support 2, and the positioning hole 46 is located on the cover 3. This structure achieves precise guidance and final positioning of the cover 3 when it is closed. When the cover 3 rotates to close around the hinge, the positioning pin 45 can be accurately inserted into the positioning hole 46. This firstly eliminates the possibility of circumferential or lateral misalignment of the cover 3 due to hinge clearance, ensuring complete alignment between the cover 3 and the filter paper support 2. This precise positioning directly ensures that the sealing component 41 above it can be accurately pressed into the predetermined position, thereby forming a uniform and reliable seal. This effectively prevents airflow leakage caused by misalignment and ensures the accuracy of the sampling volume calculation and the authenticity of the sampling results. In addition, this mechanical positioning method provides the operator with a clear tactile feedback of the closed position, improving the operating experience and preventing structural damage that may be caused by improper forced closure.

[0051] The aerosol inlet 31 is equipped with an inlet guide ramp 32, which slopes from the outside to the inside away from the filter paper support 2 along the air intake direction. The inlet guide ramp 32 serves as an effective rain and large particle protection structure. When encountering precipitation or fallen leaves or other debris, the inclined inlet guide ramp 32 allows them to slide off naturally under the influence of airflow and gravity, rather than directly entering the sampler. This significantly reduces the risk of filter paper clogging due to moisture and equipment damage, improving operational reliability in adverse weather conditions. Secondly, the optimized airflow entry pattern, with its slight guiding effect on the incoming airflow, helps to create a more stable flow field outside the aerosol inlet 31, which can, to some extent, assist in separating some non-target particles with greater inertia (such as dust), making the aerosol entering the sampler more representative. This ingenious design, with its simple structure, simultaneously improves the equipment's environmental adaptability, sampling accuracy, and long-term operational stability.

[0052] The control device 7 is installed inside the enclosure 1. The control device 7 is electrically connected to the fan 5 and the flow meter 6, and is positioned close to the fan 5. The side wall of the enclosure 1 is equipped with control buttons, a power socket, a fuse holder, an alarm indicator light, and an ambient temperature and humidity probe, all electrically connected to the control device 7. Placing the control device 7 inside the enclosure 1 and close to the fan 5 significantly shortens the connection distance between the power and signal lines. This not only reduces line loss and electromagnetic interference and improves control response speed, but also makes the internal wiring simpler and neater, facilitating maintenance. Furthermore, the heat generated by the control device 7 can be promptly dissipated by the fan 5, preventing overheating and improving operational stability. On the other hand, the control buttons, power socket, fuse holder, alarm indicator light, and ambient temperature and humidity probe are all integrated into the side wall of the enclosure 1 and connected to the control device 7. They can be set on the same side wall, forming a highly integrated "human-machine interface": users can complete all basic control and status monitoring without having to walk around the equipment; the fuse holder provides necessary overload protection; the alarm indicator light can intuitively display equipment failure or sampling abnormality; and the ambient temperature and humidity probe provides key environmental parameters for accurate correction of sampling data and compliance assessment, thus achieving a unity of convenient operation, complete functions, and safe and reliable operation as a whole.

[0053] The side walls of the housing 1 are equipped with reinforcing ribs 11, the bottom of the housing 1 is fitted with telescopic rods 12, and one side wall of the housing 1 is fitted with omnidirectional wheels 13. Firstly, the reinforcing ribs 11 effectively improve the structural rigidity and overall stability of the housing 1. When the high-flow-rate fan 5 is running, the equipment will vibrate, and the interior of the housing 1 will be under negative pressure. The reinforcing ribs 11 effectively resist the resulting vibration and deformation of the housing 1 wall panels, while ensuring that the main structure is not easily damaged during handling or accidental collisions, greatly enhancing the durability and reliability of the equipment. Secondly, the combination of the telescopic rods 12 and the omnidirectional wheels 13 transforms the originally bulky sampler into easily movable "luggage." Users only need to pull out the telescopic rods 12 to tilt the equipment and use the omnidirectional wheels 13 to easily transport it to different monitoring points. This completely overcomes the pain points of traditional large samplers being difficult to transport and requiring multiple people to work together, making it particularly suitable for field surveys or emergency monitoring tasks that require frequent site changes, greatly improving work efficiency and reducing labor intensity.

[0054] Preferably, an exhaust pipe is installed on the connecting flange 61. Through the exhaust pipe, the filtered and purified air after sampling, or waste gas that may carry heat from equipment operation, can be guided to a specific, more suitable location for discharge. For example, when used indoors in confined spaces, the waste gas can be directly led outdoors or to a ventilation system, effectively avoiding interference with the local microenvironment caused by the exhaust airflow, thereby ensuring the stability of the airflow field near the sampling inlet and improving the accuracy of the sampling results. At the same time, this design also improves the safety of equipment use. In situations where potential chemical residues or biological aerosols may be present, the waste gas can be guided to a safe area for treatment, reducing the risk of cross-contamination and personnel exposure. Furthermore, directional exhaust also avoids dust problems that may be caused by high-speed airflow directly blowing onto the ground, further optimizing the overall performance of the equipment.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-flow-rate aerosol sampler, characterized in that, include: The box body has an opening at the top; A filter paper holder is installed on the outside of the top opening of the housing. Several filter paper supports are installed on the filter paper holder, and several vertical through holes are provided on the filter paper supports. The cover is hinged to the filter paper support, and each side wall of the cover is provided with an aerosol air inlet, which is connected to the inner cavity of the box through the vertical through hole; A sealing and positioning structure is disposed between the cover and the filter paper support, and the sealing and positioning structure is used to seal and fix the filter paper and to position the cover and the filter paper support. A fan is installed inside the housing. The exhaust port of the fan is connected to one end of a duct. The duct is horizontally positioned at the center of the housing. The other end of the duct is connected to an air outlet on the housing. A flow meter is installed on the outside of the air outlet, and a connecting flange is installed on the flow meter.

2. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The sealing positioning structure includes a sealing assembly, which includes a conformal pressure ring and a plurality of elastic pressure rods adapted thereto. The conformal pressure ring is installed on the filter paper support for pressing the filter paper. The elastic pressure rod is installed on the cover. After the cover is pressed onto the filter paper support, the elastic pressure rod vertically and elastically abuts against the conformal pressure ring.

3. The ultra-high flow rate aerosol sampler as described in claim 2, characterized in that, A deformable element is installed at the bottom end of the elastic pressure bar.

4. The ultra-high flow rate aerosol sampler as described in claim 2, characterized in that, The sealing and positioning structure includes at least one positioning component, which is disposed on a side away from the hinge point between the cover and the filter paper support. The positioning component includes a positioning pin and a corresponding positioning hole. The positioning pin is mounted on the filter paper holder, and the positioning hole is located on the cover.

5. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The aerosol inlet is provided with an inlet guide slope, which is inclined from the outside to the inside along the inlet direction toward the side away from the filter paper support.

6. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The number of fans is two, and the two fans are connected to the same end of the air duct.

7. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The enclosure is equipped with a control device, which is electrically connected to the fan and the flow meter, and is located close to the fan. The side wall of the enclosure is equipped with control buttons, a power socket, a fuse holder, an alarm indicator light, and an ambient temperature and humidity probe, all of which are electrically connected to the control device.

8. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The side walls of the enclosure are equipped with reinforcing ribs.

9. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, The bottom of the box is equipped with a telescopic rod, and one side wall of the box is equipped with omnidirectional wheels.

10. The ultra-high flow rate aerosol sampler as described in claim 1, characterized in that, An exhaust pipe is installed on the connecting flange.

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