Portable small aerosol sampler

Abstract

The utility model belongs to the technical field of small aerosol samplers, and particularly relates to a portable small aerosol sampler which comprises a main machine lower shell and a main machine upper shell, a large-flow fan is contained between the main machine lower shell and the main machine upper shell, an inlet of the large-flow fan is communicated with an air inlet of a main machine, and an outlet of the large-flow fan is communicated with an air outlet of the main machine. The main machine air inlet is connected with the sampling assembly through an air path connecting pipe, the sampling assembly comprises a sampling air inlet, a sampling air outlet pipe communicated with the air path connecting pipe and a sampling bottle, and the sampling air inlet is of a three-way structure and is divided into an upper working port communicated with the sampling air outlet pipe, a lower working port communicated with the sampling bottle and a side working port. The utility model provides a portable small aerosol sampler.

Description

Technical Field

[0001] The utility model belongs to the technical field of small aerosol samplers, and in particular relates to a portable small aerosol sampler. Background Art

[0002] Existing technology:

[0003] Bioaerosol particles are carriers of viruses, bacteria and fungi, and their main mode of transmission is through the air. At present, bioaerosols can not only cause respiratory infections, asthma, allergies and other respiratory diseases, but also cause a significant increase in blood pressure in healthy people, leading to irreversible chronic lung function decline, which has an important impact on public health and disease prevention and control, and its collection and monitoring is imperative.

[0004] In recent years, a variety of infectious diseases have caused panic around the world. The international community has attached unprecedented importance to the detection technology of bioaerosols, and all countries have accelerated the development of bioaerosol equipment. Continuous monitoring and on-site rapid detection of bioaerosols have been basically established. Among them, mature sampling methods include natural sedimentation, jet impact, centrifugal impact, filtration, electrostatic adsorption, temperature difference forced landing, cyclone, etc. The above sampling methods have different advantages and disadvantages, which are mainly reflected in low sampling efficiency, long sampling time, large influence by particle size and collection liquid, and difficult path cleaning.

[0005] The samplers currently available on the market use liquid impact and filter membrane types, but the sampling flow rate is small and the collection efficiency is low. Some samplers also use solid impact, but they have great damage to the activity of biological particles and are not conducive to subsequent detection.

[0006] The difficulty and significance of solving the above technical problems:

[0007] Therefore, based on these problems, providing a portable small aerosol sampler has important practical significance. Utility Model Content

[0008] The purpose of this application is to provide a portable small aerosol sampler to solve the technical problems in the prior art.

[0009] The technical solution adopted by the embodiment of the present application to solve the technical problems existing in the known technology is:

[0010] A portable small-sized aerosol sampler comprises a main body lower shell and a main body upper shell, a large-flow fan is accommodated between the main body lower shell and the main body upper shell, an inlet of the large-flow fan is connected with a main body air inlet, and the main body air inlet is connected with a sampling component through an air path connecting pipe, the sampling component comprises a sampling air inlet, a sampling air outlet pipe connected with the air path connecting pipe, and a sampling bottle, the sampling air inlet is a three-way structure, which is divided into: an upper working port connected with the sampling air outlet pipe, a lower working port connected with the sampling bottle, and a side working port, the diameter of the upper part of the upper working port is larger than the diameter of the lower part, a vertically arranged columnar circular ring structure is provided inside the lower working port, an inner area of ​​the columnar circular ring structure is connected with the upper working port, and an outer area of ​​the columnar circular ring structure is connected with the side working port.

[0011] The embodiments of the present application may also adopt the following technical solutions:

[0012] In the above-mentioned portable small aerosol sampler, further, the side working port is a semi-fan-shaped cyclone separator structure, whose width is 1.5-2 times of its depth, and the air path connecting pipe is a flexible bellows.

[0013] In the above-mentioned portable small aerosol sampler, further, the four corners of the main unit lower shell are supported by hemispherical foot pads, and the bottom of the main unit lower shell is provided with external connecting threads, which can be connected to the support rod through threads.

[0014] In the above-mentioned portable small aerosol sampler, further, the outlet of the large-flow fan is toward the main machine air outlet, or is connected to the main machine air outlet through an airway cover.

[0015] In the above-mentioned portable small aerosol sampler, further, the host air inlet is arranged on the top of the host upper shell, and the host air outlet is arranged on the bottom surface of the host lower shell.

[0016] In the above-mentioned portable small-sized aerosol sampler, further, the portable small-sized aerosol sampler also includes a circuit component, and the circuit component includes a switch, a power supply interface, an integrated screen component, a circuit control board and a battery pack.

[0017] In the above-mentioned portable small aerosol sampler, further, the battery pack includes four batteries, and the four batteries are arranged in two series and two parallels.

[0018] In the above-mentioned portable small aerosol sampler, further, the battery pack is arranged between the main body lower shell and the main body upper shell, and vibration-damping foam is wrapped around the battery pack. When the main body lower shell and the main body upper shell are buckled together, the vibration-damping foam is compressed.

[0019] In the above-mentioned portable small aerosol sampler, further, the power supply interface is connected to the circuit control board through a switch, and the circuit control board is connected to the battery pack to charge it. When the battery pack has no external power supply, the battery pack reversely powers the circuit control board. The circuit control board is connected to both the integrated screen assembly and the large-flow fan, and can power the integrated screen assembly and the large-flow fan at the same time.

[0020] In the above-mentioned portable small aerosol sampler, further, the integrated screen assembly is a human-computer interaction interface and is connected to the circuit control board. The integrated screen assembly can transmit control information to the circuit control board, and the circuit control board is connected to the large-flow fan and can drive it to operate.

[0021] One or more technical solutions provided in the embodiments of the present application have at least the following beneficial effects:

[0022] 1. The utility model is based on the principle of wet wall cyclone, which can reduce the damage to the activity of biological particles and improve the collection efficiency. It has the advantages of simple operation, convenient disassembly, light weight, portability and long battery life. In short, the utility model can greatly improve the sampling flow and collection efficiency without damaging the activity of aerosol particles.

[0023] 2. The utility model not only optimizes the overall appearance, but also makes improvements and enhancements in the air inlet structure of the sampling air inlet, the air path connecting pipe method between the sampling air outlet pipe and the fan inlet, the whole machine fixing and installation method, and the optimization of the power supply battery pack, etc., and has unparalleled advantages over other equipment.

[0024] 3. The utility model adopts a semi-fan-shaped cyclone separator structure in the air intake structure of the sampling air inlet, so it effectively solves the problem of poor separation effect caused by direct air intake in the prior art, and thus has the advantages of improving the sampling flow rate and sampling efficiency. Most of the existing air intake methods are circular, elliptical or square air intakes, and the cyclone separation effect is poor. The semi-fan-shaped cyclone separator structure adopted by the utility model solves this problem well, which is pioneering.

[0025] 4. The utility model adopts a bellows flexible connection method in the air connection pipe connection between the sampling air outlet pipe and the fan inlet, which effectively solves the problem of air intake and air return caused by large wind resistance during the air intake of the fan, thereby improving the smoothness of the entire air connection, and has the advantages of smooth air path and low air intake noise. Most of the existing air connection pipes are directly connected by round or square plastic pipes. Since plastic pipes do not have the flexible characteristics of bellows, the smoothness of the air path is not good. The bellows flexible connection method adopted by the utility model solves this problem well and is pioneering.

[0026] 5. The utility model adopts a dual installation method for fixing and installing the whole machine. At the bottom of the lower shell of the main machine, there are both hemispherical foot pads and external connecting threads, so that the whole sampler can be placed on the work surface and can be equipped with support rods. The existing structure generally adds foot pads at the bottom, and most of them are flat foot pads. Due to the large contact surface, it is easy to cause the whole machine to be unstable, affecting the normal operation of the fan. The utility model adopts hemispherical foot pads, which not only meets the existing support requirements, but also reduces the contact surface with the workbench, making the whole machine easier to balance and stabilize. And the utility model is additionally equipped with external connecting threads, which can be equipped with additional support rods, making it convenient to carry and use outdoors. This allows the utility model to meet both indoor and outdoor use needs, and has the advantage of wide use.

[0027] 6. The utility model has been improved and enhanced in the optimization of the power supply battery pack. Although the traditional battery pack power supply method is adopted, the utility model only adopts 4 21700 batteries in 2 series and 2 parallel mode for power supply. The battery pack occupies a small space as a whole, and can meet the voltage and power requirements of the equipment at the same time. A power supply interface is set up, which can not only power the entire device through an external power supply, but also charge the battery pack in the device. The battery pack of the utility model is only displayed as a backup power supply when the external power supply cannot supply power, and the battery pack with a smaller space meets the endurance requirements of the overall equipment, which has the advantages of energy saving and power saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technical solutions of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings, but it should be noted that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present application. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0029] Figure 1 It is a three-dimensional diagram of the overall structure of the first embodiment.

[0030] Figure 2 It is a left side view of the overall structure of the first embodiment.

[0031] Figure 3 It is a bottom view of the overall structure of the first embodiment.

[0032] Figure 4 It is a cross-sectional view of the overall structure of the first embodiment.

[0033] Figure 5 It is a schematic diagram of the internal structure of the first embodiment.

[0034] Figure 6 This is a circuit structure block diagram of the first embodiment. (The solid line is the power supply circuit, and the dotted line is the control circuit)

[0035] Figure 7-1 It is a front view of the sampling air inlet of the first embodiment.

[0036] Figure 7-2 It is a cross-sectional view of the sampling air inlet of the first embodiment.

[0037] Figure 7-3 It is a cross-sectional view of the HH plane of the sampling air inlet of the first embodiment.

[0038] Figure 7-4 It is a stereoscopic diagram of the sampling air inlet of the first embodiment.

[0039] Figure 7-5 It is a bottom view of the sampling air inlet of the first embodiment.

[0040] In the figure:

[0041] 1. Main unit lower shell; 2. Main unit upper shell; 3. Switch; 4. Power supply interface; 5. Integrated screen assembly; 6. Main unit air inlet; 7. Main unit air outlet; 8. High-flow fan; 9. Air connection pipe; 10. Circuit control board; 11. Sampling air outlet pipe; 12. Sampling air inlet; 13. Sampling bottle; 14. Hemispherical foot pad; 15. Battery pack; 16. External connection thread; 17. Airway cover. DETAILED DESCRIPTION

[0042] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0043] Example 1

[0044] This embodiment includes: a host component, a sampling component and a circuit component.

[0045] The host assembly includes a host lower shell 1, a host upper shell 2 and an airway cover 17. The airway cover 17 is a part of the air path at the front end of the host air outlet 7, and acts as a wind shield to ensure that the air volume is only discharged along the host air outlet 7.

[0046] The bottom of the main unit lower shell 1 is provided with a hemispherical foot pad 14 (which can be directly placed on a work surface for indoor use) and an external connection thread 16, which can be externally connected to a support rod (additional configuration, not reflected in this patent) to fix the structure for convenient outdoor use.

[0047] The main unit upper shell 2 is provided with a main unit air inlet 6, and the main unit lower shell 1 is provided with a main unit air outlet 7. A large-flow fan 8 and an air circuit connecting pipe 9 are provided inside the main unit. The air circuit connecting pipe 9 is a flexible bellows, which connects the sampling air outlet pipe 11 and the main unit air inlet 6. The outlet of the large-flow fan 8 faces (or is connected to) the main unit air outlet 7.

[0048] The sampling assembly includes a sampling air outlet pipe 11, a sampling air inlet 12 and a sampling bottle 13; the sampling air inlet 12 is a three-way structure, and the side working port of the sampling air inlet is an air inlet, which is connected to the outer circle part of the circular ring of the lower working port; the outer circle part of the circular ring of the lower working port is connected to the top of the sampling bottle 13 through a threaded manner; the upper working port is a stepped cylindrical structure, which is directly connected to the circular air path connecting pipe 9.

[0049] The interior of the sampling assembly is a cylindrical ring structure, which is divided into an upper working port, a lower working port and a side working port. The upper working port is a stepped cylindrical structure, with a stepped large circular hole at the top and a stepped small circular hole at the bottom, and a conical transition in the middle. In this way, when the wind flows from the bottom to the top, the flow rate gradually increases. Since the lower part has a smaller diameter than the upper part, a certain amount of negative pressure will be formed at the bottom after the wind flows away, which is convenient for inhaling more gas from the lower working port.

[0050] The lower working port is a cylindrical ring structure, and the outer side of the ring area has a threaded structure, which can be directly connected to the sampling bottle 13. There are two air paths here. The central circular area of ​​the ring structure is one air path, which is connected to the upper working port; the outer ring area of ​​the ring structure is another air path, which is connected to the side working port. The central circular area and the outer ring area of ​​the ring structure meet at the end face of the ring structure to form an air inlet transition zone.

[0051] The side working port is a semi-fan-shaped cyclone separator structure, which is approximately a quarter-circular structure in appearance, but different from the standard circular structure, the inner part of the quarter-circular structure is cut off, leaving only the arc part. We call this quarter-circular structure with a cut-off area a semi-fan-shaped structure, and because this structure has a cyclone separation function, it is called a semi-fan-shaped cyclone separator structure. This makes the width of this arc-shaped area approximately twice the depth.

[0052] When in working state, dusty gas from the outside enters the cyclone separator tangentially at a high linear speed. Since the width is about twice the depth, the airflow mainly enters tangentially, and after reaching the side wall, it swirls downward, forming an outer spiral flow field rotating downward in the semi-fan-shaped annular space, and enters the lower working port from the outer annular area of ​​the circular ring structure. After reaching the bottom of the lower working port, it turns upward with the same rotation direction to form an inner spiral flow field until it reaches the upper working port and flows out. Particles or droplets are thrown toward the wall of the cylinder under the action of centrifugal force in the inner and outer rotating flow fields, and fall along the cylinder wall to the sampling bottle 13 under the action of gravity, thus realizing the collection function.

[0053] The circuit assembly includes a switch 3 , a power supply interface 4 , an integrated screen assembly 5 , a large-flow fan 8 , a circuit control board 10 , and a battery pack 15 .

[0054] Among them, as shown in the attached manual Figure 6As shown. The power supply interface 4 supplies power to the circuit control board 10 through the switch 3, and the circuit control board 10 can charge the battery pack 15. When there is no external power supply, the battery pack 15 discharges and reversely supplies power to the circuit control board 10; the circuit control board 10 simultaneously supplies power to the integrated screen assembly 5 and the large-flow fan 8. The integrated screen assembly 5 is a human-machine interface, which transmits control information to the circuit control board 10, and the circuit control board 10 drives the large-flow fan 8 to operate, thereby obtaining the required fan power.

[0055] The battery pack 15 is arranged between the mainframe lower shell 1 and the mainframe upper shell 2. Vibration-damping foam is wrapped around the battery pack 15, and the foam can be compressed by the buckling structure of the mainframe lower shell 1 and the mainframe upper shell 2 to form a fixed connection.

[0056] The integrated screen component 5 adopts a 5-inch high-definition large-screen touch display mode. At the same time, the working parameters such as flow rate and working time can be set by touching the screen, and the current working status of the equipment (flow rate display and time display) can be displayed in real time. The existing sampling equipment is implemented by a single flow rate and working time manual adjustment method. The high-definition large-screen touch display method can not only customize the flow rate and set the working time, but also display the flow rate information and time information in real time, which not only realizes the visualization of the equipment, but also improves the operation effect, increases interactivity and operability, and is forward-looking and pioneering.

[0057] Working process: The sampling bottle 13 is filled with sampling medium, and is connected to the lower working port of the sampling air inlet 12 through a sealing thread. When the large-flow fan 8 is running, a negative pressure is generated at the main engine air inlet 6, and air containing aerosol particles enters through the side working port of the sampling air inlet 12 (semi-fan cyclone separator). The aerosol particles are separated from the air under the centrifugal force in the sampling air inlet 12, and the aerosol particles sink, and then are bound to the sampling medium in the sampling bottle 13 through surface tension; since the rotation speed of the sampling medium is much lower than that of the gas, the aerosol particles are able to settle in the sampling medium and finally reach the conical bottom of the sampling bottle 13; the separated air enters the large-flow fan 8 through the main engine air inlet 6 and the gas path connecting pipe 9, and is then discharged through the main engine air outlet 7, completing the entire sampling process.

[0058] In summary, the utility model provides a portable small-sized aerosol sampler.

[0059] The above embodiments describe the present invention in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of application of the present invention shall still fall within the scope of the patent coverage of the present invention.

Claims

1. A portable small aerosol sampler, characterized by: The portable small-scale aerosol sampler comprises a main body lower shell and a main body upper shell, a large-flow fan is accommodated between the main body lower shell and the main body upper shell, the inlet of the large-flow fan is connected with the main body air inlet, the main body air inlet is connected with the sampling component through an air path connecting pipe, the sampling component comprises a sampling air inlet, a sampling air outlet pipe connected with the air path connecting pipe, and a sampling bottle, the sampling air inlet is a three-way structure, which is divided into: an upper working port connected with the sampling air outlet pipe, a lower working port connected with the sampling bottle, and a side working port, the diameter of the upper part of the upper working port is larger than the diameter of the lower part, a vertically arranged columnar circular ring structure is provided inside the lower working port, the inner area of ​​the columnar circular ring structure is connected with the upper working port, and the outer area of ​​the columnar circular ring structure is connected with the side working port.

2. The portable small aerosol sampler according to claim 1 is characterized in that: The side working port is a semi-fan-shaped cyclone separator structure, the width of which is 1.5-2 times the depth, and the gas path connecting pipe is a flexible bellows.

3. The portable small aerosol sampler according to claim 1 is characterized in that: The four corners of the lower shell of the main machine are supported by hemispherical foot pads, and the bottom of the lower shell of the main machine is provided with external connecting threads, which can be connected to the supporting rod through threads.

4. The portable small aerosol sampler according to claim 1 is characterized in that: The outlet of the large-flow fan faces the air outlet of the main unit, or is connected to the air outlet of the main unit through an airway cover.

5. The portable small aerosol sampler according to claim 1 is characterized in that: The host air inlet is arranged on the top of the host upper shell, and the host air outlet is arranged on the bottom surface of the host lower shell.

6. The portable small aerosol sampler according to claim 1 is characterized in that: The portable small-sized aerosol sampler further comprises a circuit assembly, which comprises a switch, a power supply interface, an integrated screen assembly, a circuit control board and a battery pack.

7. The portable small aerosol sampler according to claim 6 is characterized in that: The battery pack includes four batteries, and the four batteries are arranged in two series and two parallels.

8. The portable small aerosol sampler according to claim 7 is characterized in that: The battery pack is arranged between the lower shell of the main machine and the upper shell of the main machine. Vibration-damping foam is wrapped around the periphery of the battery pack. When the lower shell of the main machine and the upper shell of the main machine are buckled together, the vibration-damping foam is compressed.

9. The portable small aerosol sampler according to claim 6, characterized in that: The power supply interface is connected to the circuit control board through a switch, and the circuit control board is connected to a battery pack to charge it. When the battery pack has no external power supply, the battery pack reversely powers the circuit control board. The circuit control board is connected to both the integrated screen assembly and the high-flow fan, and can power both the integrated screen assembly and the high-flow fan at the same time.

10. The portable small aerosol sampler according to claim 6, characterized in that: The integrated screen assembly is a human-machine interaction interface and is connected to a circuit control board. The integrated screen assembly can transmit control information to the circuit control board. The circuit control board is connected to a large-flow fan and can drive it to operate.

Images