CN217542752U - Microbial aerosol generation system - Google Patents
Microbial aerosol generation system Download PDFInfo
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- CN217542752U CN217542752U CN202220595999.9U CN202220595999U CN217542752U CN 217542752 U CN217542752 U CN 217542752U CN 202220595999 U CN202220595999 U CN 202220595999U CN 217542752 U CN217542752 U CN 217542752U
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Abstract
The utility model discloses a microorganism aerosol generating system, including the air-flowing atomizer, the air feed unit, supply liquid unit and aerosol chamber, the air feed unit provides high-speed clean air current in to the air-flowing atomizer, supply the liquid unit to provide the microorganism suspension in to the air-flowing atomizer, the air-flowing atomizer relies on high-speed clean air current to form the aerosol granule with the dispersion of microorganism suspension, the aerosol granule flows into the indoor diffusion of aerosol and forms even aerosol, the air feed unit includes mass flow controller, mass flow controller is used for adjusting the air feed flow of air feed unit, supply the liquid unit to include the syringe pump, the syringe pump is used for adjusting the liquid feed flow who supplies the liquid unit. The generating system can output the microbial aerosol with stable average particle size and small particle size deviation.
Description
Technical Field
The utility model relates to an aerosol technical field especially relates to a microorganism aerosol takes place system.
Background
In some fields such as biology, medicine and detection, it is often necessary to quantitatively generate microbial aerosol with a certain particle size for research or detection. For example, most masks require a measurement of bacterial filtration efficiency that requires impacting the mask with a quantitative standard particle size of bacterial aerosol to determine the filtration efficiency of the mask to the bacterial aerosol.
In a microbial aerosol generation system with an airflow type sprayer as a core, the airflow type sprayer can only complete the function of dispersing a microbial suspension into aerosol particles, all the generated aerosol particles with all the particle sizes are output, the average particle size is difficult to adjust, the geometric standard deviation of the particle sizes is large, and the aerosol particles with stable average particle size and small particle size deviation are difficult to output.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
To the problem pointed out in the background art, the utility model provides a microorganism aerosol generating system can export the stable and little microorganism aerosol of particle size deviation of average particle size.
In order to achieve the above-mentioned objects of the utility model, the utility model discloses a following technical scheme realizes:
the utility model provides a microorganism aerosol generating system, include:
the device comprises an airflow type sprayer, an air supply unit, a liquid supply unit and an aerosol chamber;
the air supply unit provides high-speed clean air flow into the airflow type sprayer, the liquid supply unit provides microorganism suspension into the airflow type sprayer, the airflow type sprayer disperses the microorganism suspension into aerosol particles by means of the high-speed clean air flow, and the aerosol particles flow into the aerosol chamber to be diffused into uniform aerosol;
the gas supply unit comprises a mass flow controller, and the mass flow controller is used for adjusting the gas supply flow of the gas supply unit;
the liquid supply unit comprises an injection pump, and the injection pump is used for adjusting the liquid supply flow of the liquid supply unit.
In some embodiments of the present application, the air supply unit is connected to a compressed air source, and the mass flow controller adjusts the flow rate of the compressed air source.
In some embodiments, the liquid supply unit further comprises a syringe, the syringe contains the microorganism suspension, and the syringe pump injects the microorganism suspension in the syringe into the air-flow sprayer.
In some embodiments of the present application, a first interface is disposed at an upper position of a side wall of the aerosol chamber, and is used for connecting with an air outlet of the air-flow type sprayer;
and a second interface is arranged at the bottom of the aerosol chamber and is used for connecting an aerosol sampling gas circuit.
In some embodiments of the present application, the second interface has a plurality of symmetrical arrangements.
In some embodiments of the present application, an air inlet pipeline is arranged at the top of the aerosol chamber, the air inlet pipeline is communicated with the outside atmosphere, and a flow rate adjusting device is arranged on the air inlet pipeline;
and a third interface is arranged at the position, close to the lower part, of the side wall of the aerosol chamber and is used for connecting a balance gas circuit.
In some embodiments of the present application, the third interface has a plurality and is symmetrically arranged.
In some embodiments of the present application, a high efficiency filter is disposed on the air intake pipeline.
In some embodiments of the present disclosure, a pressure sensor is disposed near a middle position of a sidewall of the aerosol chamber.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
the utility model provides a microorganism aerosol generating system has aerosol particle size screening function, is convenient for adjust the aerosol particle size, and the average particle size of the microorganism aerosol of output is stable and the particle size deviation is little, can be applied to the detection field that has strict requirements to aerosol particle precision.
This application realizes through accurate syringe pump that easy adjustment, accurate, the fluctuation of liquid supply volume is little, and the liquid film thickness that forms at air-flowing type atomizer hybrid chamber is stable, and the aerosol particle diameter of final formation is even, and the emergence volume is stable, and the deviation is less and the adjustment is convenient.
According to the aerosol particle size adjusting device, the periodic fluctuation of the air supply flow is eliminated by matching the external air source with the mass flow controller, the stability and the repeatability of the air supply flow are ensured, the air supply flow is convenient to adjust, the particle size of finally-formed aerosol particles is convenient to adjust, and the uniform particle size deviation is small.
This application realizes supplying liquid flow and air feed flow's accurate control through syringe pump and flow quality control ware, and the repeatability is higher, has solved traditional microorganism aerosol and has taken place that the system supplies liquid and air feed mode precision is low, the repeatability is poor, the problem of flow fluctuation to the accurate control of microorganism aerosol particle diameter and emergence volume has been improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a microbial aerosol generating system according to an embodiment.
Reference numerals:
1-sampling a gas circuit;
2-balancing the gas circuit;
100-air flow sprayer;
200-gas supply unit, 210-mass flow controller, 220-compressed gas source;
300-liquid supply unit, 310-injection pump, 320-injector;
400-aerosol chamber, 410-first interface, 420-second interface, 430-third interface, 440-fourth interface, 450-pressure sensor;
500-air inlet pipeline, 510-flow regulating device, 520-high efficiency filter.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment discloses a microbial aerosol generating system, referring to fig. 1, which mainly comprises an airflow type sprayer 100, an air supply unit 200, a liquid supply unit 300, an aerosol chamber 400 and the like.
The air supply unit 200 provides high-speed clean air flow into the air flow sprayer 100, the liquid supply unit 300 provides microorganism suspension into the air flow sprayer 100, the air flow sprayer 100 disperses the microorganism suspension by means of the high-speed clean air flow to form microorganism aerosol particles, and the microorganism aerosol particles flow into the aerosol chamber 400 to be dispersed to form uniform microorganism aerosol, so that the microorganism aerosol can be used in the fields of biology, medicine, detection and the like, such as the bacterial filtration efficiency detection of a mask.
The gas supply unit 200 includes a Mass Flow Controller (MFC) 210, and the mass flow controller 210 is used to regulate the gas supply flow of the gas supply unit 200, that is, to control the flow of the cleaning gas flowing into the gas flow nebulizer 100.
The liquid supply unit 300 includes a syringe pump 310, the syringe pump 310 is a precision syringe pump, and the syringe pump 310 is used for adjusting the liquid supply flow rate of the liquid supply unit 300, that is, the flow rate of the microorganism suspension flowing into the gas-flow type sprayer 100.
Under the condition that the airflow type sprayer 100 and the aerosol chamber 400 are the same, the particle size of the microbial aerosol has the following relation with the liquid supply flow and the gas supply flow: when the liquid supply flow is unchanged, the particle size of aerosol particles is in negative correlation with the air supply flow in a certain range; when the air supply flow is unchanged, the particle size of the aerosol particles is in positive correlation with the liquid supply flow.
In the case where the airflow type atomizer 100 and the atomizing chamber 400 are the same, the amount of the generated microbial aerosol is positively correlated with the amount of the feed liquid flow rate when the particle diameters are the same.
Therefore, in practical application, if the aerosol generation amount is in a specified range and the particle size is smaller, the air supply flow can be reduced or the liquid supply flow can be slightly increased, otherwise, the air supply flow is increased or the liquid supply flow is slightly reduced; if the particle size of the aerosol is in a specified range, if the generation amount is smaller, the liquid supply flow can be increased, or the gas supply flow can be slightly increased, otherwise, the liquid supply flow can be reduced, or the gas supply flow can be slightly reduced.
This application realizes through accurate syringe pump 310 that easy adjustment, accurate, the fluctuation of liquid supply volume are little, and the liquid film thickness that forms at air-flowing type atomizer 100 hybrid chamber is stable, and the aerosol particle diameter of final formation is even, and the emergence volume is stable, and the deviation is less and the adjustment is convenient.
According to the aerosol particle size adjusting device, the periodic fluctuation of the air supply flow is eliminated by matching the external air source with the mass flow controller 210, the stability and the repeatability of the air supply flow are ensured, the air supply flow is convenient to adjust, the particle size of finally formed aerosol particles is convenient to adjust, and the uniform deviation of the particle size is small.
According to the system, the injection pump 310 and the flow quality controller 210 are used for accurately controlling the liquid supply flow and the gas supply flow, the repetition precision is high, the problems of low precision, poor repeatability and flow fluctuation of a liquid supply and gas supply mode of a traditional microbial aerosol generation system are solved, and the accurate control of the particle size and the generation amount of microbial aerosol is improved.
The microorganism aerosol generating system has the aerosol particle size screening function, the aerosol particle size is convenient to adjust, the average particle size of output microorganism aerosol is stable, the particle size deviation is small, and the microorganism aerosol generating system can be applied to the detection field with strict requirements on the aerosol particle precision.
In some embodiments of the present application, the air supply unit 200 is connected to the compressed air source 220, and the mass flow controller 210 adjusts the flow of the compressed air source 220, so as to directly realize the precise adjustment of the air supply flow.
In some embodiments of the present application, the liquid supply unit 300 further includes an injector 320, the injector 320 may be a disposable injector, the injector 320 contains a microorganism suspension, and the injection pump 310 injects the microorganism suspension in the injector 320 into the air-flow type sprayer 100 quantitatively and at a constant speed according to the liquid supply requirement, so as to achieve accurate adjustment of the liquid supply flow.
In some embodiments, a first port 410 is disposed at an upper position of a side wall of the aerosol chamber 400, and is used for connecting with an air outlet of the airflow type sprayer 100; the bottom of the aerosol chamber 400 is provided with a second connector 420 for connecting the aerosol sampling gas circuit 1.
The microbial aerosol particles flowing out of the gas flow type atomizer 100 flow into the aerosol chamber 400 through the upper first interface 410, and fully diffuse and mix with the gas in the aerosol chamber 400 in the process of flowing to the lower second interface 420, so as to improve the uniformity of the aerosol flowing into the sampling gas path 1.
The second interface 420 has a plurality of (for example, two) interfaces and is symmetrically arranged, so that a plurality of sampling gas circuits 1 can be accessed simultaneously according to the detection requirement.
In some embodiments of the present application, an air inlet pipeline 500 is disposed at the top of the aerosol chamber 400, the air inlet pipeline 500 is communicated with the outside atmosphere, and a flow rate adjusting device 510 is disposed on the air inlet pipeline 500; a third interface 430 is arranged at a position close to the lower part of the side wall of the aerosol chamber 400 and is used for connecting the balance gas circuit 2.
The external atmosphere flows into the aerosol chamber 400 through the air inlet pipe 500 under the negative pressure of the inner cavity of the aerosol chamber 400, and the flow regulating device 510 is used for regulating the air inlet flow rate, so that the flowing air meets the aerosol mixing requirement.
The third interface 430 has a plurality of (for example, two) interfaces and is symmetrically arranged, so that a plurality of balance gas circuits 2 can be simultaneously accessed according to the detection requirement.
Before formal sampling is performed by using the sampling gas circuit 1, the aerosol chamber 400 is firstly connected to the balance gas circuit 2 through the third interface 430, and when the aerosol in the aerosol chamber 400 reaches a stable uniform state, the aerosol is connected to the sampling gas circuit 1 through the second interface 420, so that the sampling accuracy is improved.
The air inlet pipeline 500 is provided with a high-efficiency filter 520, so that the air inlet cleanliness is improved.
A pressure sensor 450 is provided near the center of the side wall of the aerosol chamber 400 to detect the pressure in the aerosol chamber 400.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A microbial aerosol generating system, comprising:
the device comprises an airflow type sprayer, an air supply unit, a liquid supply unit and an aerosol chamber;
the air supply unit provides high-speed clean air flow into the airflow type sprayer, the liquid supply unit provides microorganism suspension into the airflow type sprayer, the airflow type sprayer disperses the microorganism suspension into aerosol particles by means of the high-speed clean air flow, the aerosol particles flow into the aerosol chamber to be dispersed into uniform aerosol, and the uniform aerosol is characterized in that,
the gas supply unit comprises a mass flow controller, and the mass flow controller is used for adjusting the gas supply flow of the gas supply unit;
the liquid supply unit comprises an injection pump, and the injection pump is used for adjusting the liquid supply flow of the liquid supply unit.
2. A microbial aerosol generating system according to claim 1,
the air supply unit is connected with a compressed air source, and the mass flow controller adjusts the flow of the compressed air source.
3. A microbial aerosol generating system according to claim 1,
the liquid supply unit also comprises a syringe, the syringe is filled with the microorganism suspension, and the injection pump injects the microorganism suspension in the syringe into the airflow sprayer.
4. A microbial aerosol generating system according to claim 1,
a first interface is arranged at the upper position of the side wall of the aerosol chamber and is used for being connected with an air outlet of the airflow type sprayer;
and a second interface is arranged at the bottom of the aerosol chamber and is used for connecting an aerosol sampling gas circuit.
5. A microbial aerosol generating system according to claim 4,
the second interface is provided with a plurality of symmetrical arrangements.
6. A microbial aerosol generating system according to claim 4,
an air inlet pipeline is arranged at the top of the aerosol chamber and communicated with the outside atmosphere, and a flow regulating device is arranged on the air inlet pipeline;
and a third interface is arranged at the position, close to the lower part, of the side wall of the aerosol chamber and used for connecting a balance gas circuit.
7. A microbial aerosol generating system according to claim 6,
the third interface is provided with a plurality of symmetrical arrangements.
8. A microbial aerosol generating system according to claim 6,
and the air inlet pipeline is provided with a high-efficiency filter.
9. A microbial aerosol generating system according to any one of claims 1 to 8,
and a pressure sensor is arranged at the middle position of the side wall of the aerosol chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220595999.9U CN217542752U (en) | 2022-03-18 | 2022-03-18 | Microbial aerosol generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220595999.9U CN217542752U (en) | 2022-03-18 | 2022-03-18 | Microbial aerosol generation system |
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| CN217542752U true CN217542752U (en) | 2022-10-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116272455A (en) * | 2023-05-24 | 2023-06-23 | 北京市农林科学院信息技术研究中心 | Bioaerosol generating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116272455A (en) * | 2023-05-24 | 2023-06-23 | 北京市农林科学院信息技术研究中心 | Bioaerosol generating system |
| CN116272455B (en) * | 2023-05-24 | 2023-08-04 | 北京市农林科学院信息技术研究中心 | Bioaerosol generating system |
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