Aerosol generation calibration device

Abstract

The utility model discloses an aerosol generating and calibrating device, which comprises an air source part for outputting clean compressed air; the uniform mixing bin is provided with an aerosol inlet, a clean gas inlet, a diluent gas port, an exhaust port and a sampling port, and the clean gas inlet is arranged close to the aerosol inlet; the aerosol supply branch is connected between the gas source part and the aerosol inlet and is used for supplying aerosol into the uniform mixing bin; the clean gas supply branch is connected between the gas source part and the clean gas inlet and is used for supplying clean gas into the uniform mixing bin; the diluent gas branch is connected with the diluent gas port and is used for providing gas into the mixing bin so as to dilute the concentration of aerosol in the mixing bin; and the exhaust branch is connected with the exhaust port. According to the scheme, the mixing uniformity of the aerosol and the clean gas can be improved, and the stability and consistency of the concentration of the finished aerosol are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to aerosol monitoring technical field especially relates to a kind of aerosol generation calibration device. BACKGROUND

[0002] In existing aerosol generating equipment, standard particle mixed solution is sprayed aerosol through nozzle, mixed with clean gas after heating, and then standard particles are discharged, without dedicated mixing device, which makes the aerosol discharged after simple mixing uneven, resulting in large uncertainty and poor reliability.

[0003] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0004] To solve the problems pointed out in the background, the utility model provides an aerosol generation calibration device to improve the mixing uniformity of aerosol and clean gas, and ensure the stability and consistency of finished aerosol concentration.

[0005] To achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0006] In some embodiments of the present application, an aerosol generation calibration device is provided, comprising:

[0007] Air source part, output clean compressed air;

[0008] Mixing bin, provided with aerosol inlet, clean gas inlet, dilution gas port, exhaust port and sampling port, the clean gas inlet is arranged close to the aerosol inlet;

[0009] Aerosol gas supply branch connected between the air source part and the aerosol inlet, configured to provide aerosol into the mixing bin;

[0010] Clean gas supply branch connected between the air source part and the clean gas inlet, configured to provide clean gas into the mixing bin;

[0011] Dilution gas branch connected with the dilution gas port, configured to provide gas into the mixing bin to dilute the concentration of aerosol in the mixing bin;

[0012] Exhaust branch connected with the exhaust port.

[0013] In some embodiments of the present application, the aerosol inlet and the clean gas inlet are arranged on the circumferential side wall of the mixing bin;

[0014] The aerosol inlet is arranged on the first side of the mixing bin, the clean gas inlet is arranged on the second side of the mixing bin, and the dilution gas port is arranged on the top of the mixing bin.

[0015] In some embodiments of the application, the upper side and the lower side of the aerosol inlet are respectively provided with the clean gas inlet.

[0016] In some embodiments of the application, the top of the mixing bin is provided with the dilution gas port, the mixing bin is provided with a flow guide cover, the dilution gas port is opposite to the flow guide cover, and the outer diameter of the flow guide cover increases away from the dilution gas port.

[0017] In some embodiments of the application, the flow guide cover is connected with the inner wall of the mixing bin through a mounting column.

[0018] In some embodiments of the application, the aerosol gas supply branch is provided with a first filter, a first mass flow controller, an aerosol generating device and a heating pipe, the first filter and the first mass flow controller are arranged upstream of the aerosol generating device, and the heating pipe is arranged downstream of the aerosol generating device.

[0019] In some embodiments of the application, the clean gas supply branch is provided with a second filter and a second mass flow controller.

[0020] In some embodiments of the application, the dilution gas branch is in communication with the external atmosphere, and the dilution gas branch is provided with a third filter and a flow meter.

[0021] In some embodiments of the application, the aerosol inlet, the clean gas inlet and the dilution gas port are arranged on the first side of the mixing bin, and the exhaust port is arranged on the second side of the mixing bin.

[0022] In some embodiments of the application, the second side of the mixing bin is provided with a water drainage port.

[0023] In some embodiments of the application, 4 collection ports are evenly distributed on the circumferential wall and the conical wall of the mixing bin.

[0024] Compared with the prior art, the application has the following advantages and positive effects:

[0025] The aerosol generating calibration device of the application divides the compressed air output by the air source part into two paths, the first path flows into the mixing bin through the aerosol gas supply branch and the aerosol inlet, and the second path flows into the mixing bin through the clean gas supply branch and the clean gas inlet. The aerosol gas and the clean gas are mixed in the mixing bin. The clean gas inlet is arranged close to the aerosol inlet, which can promote the dispersion of the aerosol in the mixing bin and thus improve the mixing effect. The ambient air flows into the mixing bin through the dilution gas branch and the dilution gas port to dilute the aerosol in the mixing bin. The aerosol in the mixing bin is sampled through the sampling port. The gas in the mixing bin is discharged through the exhaust port and the exhaust branch.

[0026] The aerosol calibration device is provided with a mixing bin, which makes the aerosol and clean gas diffuse uniformly in the mixing bin, ensuring the stability and consistency of the finished aerosol concentration. The aerosol inlet is arranged close to the clean gas, which promotes the diffusion of the aerosol in the mixing bin and improves the mixing effect.

[0027] Other features and advantages of the present application will become more apparent after reading the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0029] Figure 1 A schematic diagram of the aerosol generating calibration device according to some embodiments;

[0030] Figure 2 A structural diagram of the aerosol generating calibration device according to some embodiments;

[0031] Figure 3 Another structural diagram of the aerosol generating calibration device according to some embodiments;

[0032] Figure 4 A structural diagram of the mixing bin according to some embodiments;

[0033] Figure 5 A structural diagram of the flow guide cover according to some embodiments.

[0034] REFERENCE SIGNS:

[0035] 10, air source part; 11, fourth filter; 12, fifth filter; 13, pneumatic three-way joint;

[0036] 20, mixing bin; 21, aerosol inlet; 22, clean gas inlet; 23, dilution gas inlet; 24, sampling port; 25, exhaust port; 26, drain port;

[0037] 30, aerosol supply branch; 31, first filter; 32, first mass flow controller; 33, heating tube; 34, aerosol generator; 35, peristaltic pump; 36, solution bottle; 37, aerosol generating device;

[0038] 40, clean gas supply branch; 41, second filter; 42, second mass flow controller;

[0039] 50, dilution gas branch; 51, third filter; 52, flow meter;

[0040] 60, exhaust branch; 61, sixth filter; 62, fan;

[0041] 70, fairing; 71, mounting column;

[0042] 81, standard instrument; 82, calibration instrument. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0048] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can refer to the same reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed by itself. In addition, the utility model provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0049] In some embodiments of the application, an aerosol generation calibration device is provided, Figure 1 A schematic diagram of the aerosol generation calibration device, Figure 2 A structural diagram of the aerosol generation calibration device, Figure 3 Another structural diagram of the aerosol generation calibration device.

[0050] The aerosol generation calibration device comprises a gas source part 10. The gas source part 10 is configured to output clean compressed air. The gas source part 10 comprises a fourth filter 11 and a fifth filter 12. For example, the fourth filter 11 is a pressure regulating filter, and the fifth filter 12 is a fine filter. The fourth filter 11 and the fifth filter 12 are arranged in sequence along the flow direction of the compressed air. The gas source part 10 processes and outputs the compressed air flowing through it.

[0051] The aerosol generation calibration device further comprises a mixing bin 20. Figure 4 A structure diagram of the mixing bin 20. The mixing bin 20 is provided with an aerosol inlet 21, a clean gas inlet 22, a dilution gas port 23, an exhaust port 25, and a sampling port 24. The clean gas inlet 22 is arranged close to the aerosol inlet 21.

[0052] The aerosol generation calibration device further comprises an aerosol gas supply branch 30. The aerosol gas supply branch 30 is connected between the gas source part 10 and the aerosol inlet 21, and is configured to supply aerosol into the mixing bin 20.

[0053] The aerosol generation calibration device further comprises a clean gas supply branch 40. The clean gas supply branch 40 is connected between the gas source part 10 and the clean gas inlet 22, and is configured to supply clean gas into the mixing bin 20.

[0054] The aerosol generation calibration device further comprises a dilution gas branch 50. The dilution gas branch 50 is connected with the dilution gas port 23, and is configured to supply gas into the mixing bin 20 to dilute the concentration of aerosol in the mixing bin 20.

[0055] The aerosol generation calibration device further comprises an exhaust branch 60. The exhaust branch 60 is connected with the exhaust port 25.

[0056] The clean compressed air output by the gas source part 10 is divided into two paths. The first path flows into the mixing bin 20 through the aerosol gas supply branch 30 and the aerosol inlet 21. The second path flows into the mixing bin 20 through the clean gas supply branch 40 and the clean gas inlet 22. The aerosol gas and the clean gas are mixed in the mixing bin 20. The clean gas inlet 22 is arranged close to the aerosol inlet 21, which can promote the dispersion of aerosol in the mixing bin 20 and improve the mixing effect. The external air flows into the mixing bin 20 through the dilution gas branch 50 and the dilution gas port 23, and dilutes the aerosol in the mixing bin 20. The aerosol in the mixing bin 20 is sampled through the sampling port 24. The gas in the mixing bin 20 is discharged through the exhaust port 25 and the exhaust branch 60.

[0057] The aerosol calibration device sets the mixing bin 20, so that the aerosol and the clean gas are uniformly diffused in the mixing bin 20, ensuring the stability and consistency of the finished aerosol concentration. The aerosol inlet 21 is arranged close to the clean gas, which promotes the diffusion of aerosol in the mixing bin 20 and improves the mixing effect.

[0058] In some embodiments of the present application, the circumferential side wall of the mixing bin 20 is provided with an aerosol inlet 21 and a clean gas inlet 22. The aerosol flows into the mixing bin 20 through the aerosol inlet 21 in a tangential direction to the inner wall of the mixing bin 20, and the clean gas flows into the mixing bin 20 through the clean gas inlet 22 in a tangential direction to the inner wall of the mixing bin 20. In this way, the aerosol and the clean gas form a cyclone when flowing into the mixing bin 20, which helps to further improve the dispersibility of the particles.

[0059] In some embodiments of the present application, the upper side and the lower side of the aerosol inlet 21 are respectively provided with a clean gas inlet 22, and the two streams of clean gas flow into the mixing bin 20 together with the aerosol and form a cyclone, which helps to further improve the dispersibility of the particles.

[0060] In some embodiments of the present application, the top of the mixing bin 20 is provided with a dilution gas port 23, and the mixing bin 20 is provided with a flow guide cover 70, the dilution gas port 23 is opposite to the flow guide cover 70, and the outer diameter of the flow guide cover 70 increases away from the dilution gas port 23. For example, the flow guide cover 70 is conical. Figure 5 A structure diagram of the flow guide cover 70.

[0061] The external air flows into the mixing bin 20 through the dilution gas port 23, and the air diffuses along the outer peripheral wall of the flow guide cover 70. The flow guide cover 70 can effectively adjust the air flow distribution and reduce the turbulence of the gas, so that the air flow is uniformly distributed, which helps to improve the air supplement efficiency and stability.

[0062] In some embodiments of the present application, the flow guide cover 70 is connected to the inner wall of the mixing bin 20 through a mounting column 71, which improves the fixing reliability of the flow guide cover 70.

[0063] In some embodiments of the present application, the aerosol gas supply branch 30 is provided with a first filter 31, a first mass flow controller 32, an aerosol generating device 37, and a heating pipe 33. The first filter 31 and the first mass flow controller 32 are arranged upstream of the aerosol generating device 37, and the heating pipe 33 is arranged downstream of the aerosol generating device 37. The first filter 31 is a high-efficiency filter.

[0064] The clean compressed air input from the gas source part 10 is filtered by the first filter 31 and then flows into the aerosol generating device 37. The aerosol generated by the aerosol generating device 37 is first heated by the heating pipe 33 and then flows into the mixing bin 20.

[0065] The aerosol generator 34 is connected to the solution bottle 36 through the peristaltic pump 35. The peristaltic pump 35 is connected to the solution bottle 36 through a silica gel tube, and is connected to the aerosol generator 34 through another silica gel tube.

[0066] In some embodiments of the present application, the clean gas supply branch 40 is provided with a second filter 41 and a second mass flow controller 42. The second filter 41 is a high-efficiency filter.

[0067] In some embodiments of the present application, the gas source part 10 comprises a pneumatic triple 13 connected to an external gas source, and is connected to the first mass flow controller 32 and the second mass flow controller 42 through a Y-shaped three-way pipe.

[0068] In some embodiments of the present application, the dilution gas branch 50 is connected to the external atmosphere, and is provided with a third filter 51 and a flow meter 52.

[0069] The third filter 51 is a high-efficiency filter, and the external air is filtered through the third filter 51 and then enters the mixing chamber 20.

[0070] The amount of air supplement is controlled by the flow meter 52, so as to adjust the concentration of the aerosol in the mixing chamber 20 to achieve the required working condition.

[0071] In some embodiments of the present application, the aerosol inlet 21, the clean gas inlet 22 and the dilution gas inlet 23 are arranged on a first side of the mixing chamber 20, and the exhaust outlet 25 and the sampling inlet 24 are arranged on a second side of the mixing chamber 20. The first side and the second side are opposite. In this way, the aerosol, the clean gas and the air supplement flow into the first side of the mixing chamber 20, and are continuously mixed during the flow to the second side, so as to increase the mixing time and achieve uniform mixing when reaching the second side, and then sampling.

[0072] In some embodiments of the present application, the second side of the mixing chamber 20 is provided with a drainage outlet 26. The droplets in the mixing chamber 20 are discharged through the drainage outlet 26.

[0073] In some embodiments of the present application, the exhaust branch 60 is provided with a sixth filter 61 and a fan 62. The fan 62 provides the driving force for the gas flow. The gas in the mixing chamber 20 is discharged through the exhaust branch 60.

[0074] In some embodiments of the present application, multiple sampling ports 24 are provided to ensure consistency of the finished aerosol. Referring to Figure 1 The sampling ports are connected to standard equipment 81 and calibration equipment 82.

[0075] The aerosol generation calibration device in the present application integrates biological aerosol generation, aerosol dilution and mixing into one, and can be used in the fields of microorganism sampling and particulate matter detection. By using a large-particle aerosol generator 34 and a specific mixing bin 20, the standard aerosol and clean gas are diffused uniformly, and the stability and consistency of the finished aerosol concentration are ensured.

[0076] The large-particle aerosol generator 34 can be used to generate multiple aerosols, including microorganisms and standard particles of different particle sizes, and the largest standard particle aerosol can be generated to 10 μm.

[0077] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0078] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An aerosol generation calibration device, characterized by, The aerosol generation calibration device comprises: an air source part for outputting clean compressed air; a mixing bin provided with an aerosol inlet, a clean air inlet, a dilution gas inlet, an exhaust outlet, and a sampling port, wherein the clean air inlet is arranged close to the aerosol inlet; an aerosol gas supply branch connected between the air source part and the aerosol inlet and configured to supply aerosol into the mixing bin; a clean gas supply branch connected between the air source part and the clean air inlet and configured to supply clean gas into the mixing bin; a dilution gas branch connected with the dilution gas inlet and configured to supply gas into the mixing bin to dilute the concentration of aerosol in the mixing bin; an exhaust branch connected with the exhaust outlet.

2. The aerosol generation calibration device according to claim 1, wherein: the aerosol inlet and the clean air inlet are arranged on the circumferential side wall of the mixing bin; aerosol flows into the mixing bin through the aerosol inlet in a tangential direction of the inner wall of the mixing bin, and clean gas flows into the mixing bin through the clean air inlet in a tangential direction of the inner wall of the mixing bin.

3. The aerosol generation calibration device according to claim 1, wherein: the clean air inlet is arranged on the upper side and the lower side of the aerosol inlet, respectively.

4. The aerosol generation calibration device according to claim 1, wherein: the dilution gas inlet is arranged on the top of the mixing bin, a flow guide cover is arranged in the mixing bin, the dilution gas inlet faces the flow guide cover, and the outer diameter of the flow guide cover increases away from the dilution gas inlet.

5. The aerosol generation calibration device according to claim 4, wherein: the flow guide cover is connected with the inner wall of the mixing bin through a mounting column.

6. The aerosol generation calibration device according to claim 1, wherein: a first filter, a first mass flow controller, an aerosol generation device, and a heating pipe are arranged on the aerosol gas supply branch, the first filter and the first mass flow controller are arranged upstream of the aerosol generation device, and the heating pipe is arranged downstream of the aerosol generation device.

7. The aerosol generation calibration device according to claim 1, wherein: a second filter and a second mass flow controller are arranged on the clean gas supply branch.

8. The aerosol generation calibration device according to claim 1, wherein: the dilution gas branch is in communication with the external atmosphere, and a third filter and a flow meter are arranged on the dilution gas branch.

9. The aerosol generation calibration device according to claim 1, wherein: the aerosol inlet, the clean air inlet, and the dilution gas inlet are arranged on a first side of the mixing bin, and the exhaust outlet is arranged on a second side of the mixing bin.

10. The aerosol generation calibration device according to claim 1, wherein: a drain outlet is arranged on the second side of the mixing bin.

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