CN115753319A - Air duct aerosol blending device - Google Patents
Air duct aerosol blending device Download PDFInfo
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- CN115753319A CN115753319A CN202211377795.9A CN202211377795A CN115753319A CN 115753319 A CN115753319 A CN 115753319A CN 202211377795 A CN202211377795 A CN 202211377795A CN 115753319 A CN115753319 A CN 115753319A
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- aerosol
- air duct
- pipeline
- butt joint
- mixer
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- 239000000443 aerosol Substances 0.000 title claims abstract description 107
- 238000002156 mixing Methods 0.000 title claims abstract description 30
- 210000001503 joint Anatomy 0.000 claims abstract description 44
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 9
- 238000005457 optimization Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The invention provides an air duct aerosol mixer, which belongs to the technical field of test and comprises a mixer main body and a butt joint port, wherein the butt joint port comprises two air duct butt joint ports and one aerosol conveying pipeline butt joint port; the main body of the mixer is in a T-shaped symmetrical structure, two air duct butt joints are respectively connected with air duct pipelines, and aerosol conveying pipeline butt joints are connected with aerosol conveying pipelines; the main body of the mixer comprises a gas collecting pipe and a gas distributing pipe; the gas collecting pipe is integrally of a symmetrical structure and is arranged on the outer side of the mixer main body along the axial direction of the air duct pipeline, and the gas collecting pipe and the butt joint of the aerosol conveying pipeline are communicated through a pipeline; the section of the airflow channel is in an inverted concave shape; the gas collecting pipe is used for connecting the gas distributing pipe; the gas distribution pipe is in a hollow pipe shape, one end of the gas distribution pipe is used for air inlet, and the other end of the gas distribution pipe is closed; the gas distribution pipe is distributed with a plurality of injection holes along the length direction. The invention solves the problems that the existing aerosol mixing device is huge in size and cannot improve the concentration and the flow velocity uniformity of the aerosol on the cross section of the air duct within a short distance.
Description
Technical Field
The invention belongs to the technical field of test and test, and particularly relates to an air duct aerosol mixer.
Background
The aerosol mixing refers to stirring and mixing specific aerosol in the air duct, so that the aerosol is uniformly distributed on the cross section of the air duct. The aerosol mixing device is mainly applied to matching of filter detection equipment and calibration equipment of an aerosol monitoring instrument or a sensor.
The existing aerosol mixing device mainly adopts a single-point dust generation mode, and aerosol mixing is realized by turbulent flow of various mixing elements, wherein European and American air filter test benches use the combination of a mixing pore plate and a porous diffusion plate as a mixing device for wind speed and aerosol; the Japanese filter unit test device adopts a variable diameter air pipe as an aerosol mixing device; a sodium flame method test air duct in GB/T6165-2008 adopts a straight pipe section with the diameter 5 times of that of a buffer tank as an aerosol uniformly mixing device.
Although detection and test devices related to aerosol provide requirements for blending the aerosol and have uniformity standards, it is unclear whether the blending device finally achieves uniform aerosol concentration or uniform airflow, and the existing blending device mostly adopts combination of multiple modes to achieve a better blending effect, and the size is large, so that the size of the whole system is large. Therefore, the aerosol mixing device is optimized integrally, and the concentration and the flow speed uniformity of the aerosol on the cross section of the air channel can be improved in a short distance.
High-performance aerosol mixing device is crucial to fields such as high efficiency filter test detection, aerosol photometer's calibration, sea ship salt fog separation technical verification, is necessary to make the improvement to current aerosol mixing device, improves the degree of integrating, reduces mixing device's volume to and promote wind channel cross-section aerosol concentration and velocity of flow homogeneity in the short distance.
Disclosure of Invention
The invention provides an air duct aerosol mixing device, and aims to solve the problems that an existing aerosol mixing device is large in size and cannot improve the concentration and the flow speed uniformity of aerosol on the cross section of an air duct in a short distance.
The purpose of the invention is realized by the following technical scheme:
an air duct aerosol mixer comprises a mixer main body and a butt joint port, wherein the butt joint port comprises two air duct butt joint ports and one aerosol conveying pipeline butt joint port; the main body of the mixer is of a T-shaped symmetrical structure, two air duct butt joints have the same specification and are coaxially arranged and are respectively detachably connected with air duct pipelines on two sides, and one aerosol conveying pipeline butt joint is arranged along the direction vertical to the axis of the air duct pipeline and is detachably connected with the aerosol conveying pipeline; the inner section of the part of the mixer main body which is coaxially arranged along the air duct pipeline is the same as the inner section of the air duct pipeline in shape and size, the interface specification of the air duct interface is the same as that of the air duct pipeline, and the mixer main body is detachably connected with the air duct pipeline through the air duct interface; the inner section of the part of the main body of the mixer, which is connected with the aerosol conveying pipeline, has the same shape and size as the inner section of the aerosol conveying pipeline, the butt joint of the aerosol conveying pipeline is consistent with the interface of the aerosol conveying pipeline in specification, and the main body of the mixer is detachably connected with the aerosol conveying pipeline through the butt joint of the aerosol conveying pipeline; the main body of the mixer comprises a gas collecting pipe and a gas distributing pipe; the gas collecting pipe is integrally of a symmetrical structure and is arranged on the outer side of the main body of the mixer along the axial direction of the air channel pipeline, and a communicated airflow channel is arranged inside the gas collecting pipe, is fixedly connected with the air channel pipeline and is isolated by a side wall; the gas collecting pipe and the butt joint of the aerosol conveying pipeline are communicated through a pipeline which has the same shape and size with the internal section of the aerosol conveying pipeline; the section of the airflow channel is in an inverted concave shape; the gas collecting pipe is used for connecting the gas distributing pipe; the gas distributing pipes are in a hollow pipe shape with equal cross section, wherein one end of the gas distributing pipes is used for air inlet, the other end of the gas distributing pipes is closed, every two gas distributing pipes are in a group and are arranged in parallel, and the air inlets are arranged in a staggered mode and are respectively communicated with different sides of the gas collecting pipes; the gas distributing pipes are provided with a plurality of groups, and the distance between every two adjacent groups is equal; the air distribution pipe is distributed with a plurality of jet holes along the length direction, the opening direction of the jet holes is back to the incoming flow direction of the air duct, and aerosol is jetted into the air duct through the jet holes; the total area of the orifices of the injection holes is more than or equal to the cross section area of the gas distribution pipe.
For further optimization, in the main body of the mixer, the equivalent diameter of two gas distribution pipes in the same group is 2 times of the distance between two adjacent groups.
As a further optimization, the injection holes are arranged in the vortex region of the gas distribution pipe.
As a further optimization, the side wall at the joint of the gas collecting pipe and the air duct pipeline is shared.
As further optimization, the aerosol conveying pipeline butt joint port is located in the middle of the gas collecting pipe.
As further optimization, the air duct butt joint port adopts a flange structure and is consistent with the specification of a port flange of an air duct pipeline.
As further optimization, the butt joint of the aerosol conveying pipeline adopts a flange structure, and the specification of the butt joint is consistent with that of an interface flange of the aerosol conveying pipeline.
The beneficial technical effects obtained by the invention are as follows:
adopt the integrated design, compare with prior art, have integrate high, advantages such as mounting means is simple, have solved the bulky problem of current mixing device. Through the design of the spray holes of the gas distribution pipes and the combined distribution of the gas distribution pipes, the beneficial technical effect of improving the concentration and the flow speed uniformity of the aerosol on the cross section of the air channel in a short distance is achieved, the problems that the existing aerosol mixing device is large in size and cannot improve the concentration and the flow speed uniformity of the aerosol on the cross section of the air channel in a short distance are solved, and the device has prominent substantive characteristics and remarkable progress.
Drawings
FIG. 1 is a schematic structural diagram of an interface of an air duct aerosol mixer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the internal structure of an air duct aerosol mixer according to one embodiment of the present invention;
FIG. 3 is a schematic view of the internal flow of an air duct aerosol mixer according to one embodiment of the present invention;
reference numerals: 1. a mixer main body; 2. an air duct interface; 3. an aerosol delivery line interface; 4. a gas collecting pipe; 5. an airflow channel; 6. a gas distributing pipe; 7. an injection hole; F. an aerosol carrier fluid.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, shall fall within the scope of the claimed invention.
As shown in fig. 1 to 3, a specific embodiment of an air duct aerosol mixer includes a mixer main body 1 and a butt joint port, and the butt joint port includes two air duct butt joint ports 2 and one aerosol conveying pipeline butt joint port 3.
In this embodiment, the main body 1 of the mixer is a symmetrical structure in a shape like a letter T, two air duct interfaces 2 are in the same specification and are coaxially arranged, and are detachably connected with the air duct pipelines on two sides respectively, and one aerosol conveying pipeline interface 3 is arranged along the direction perpendicular to the axis of the air duct pipeline and detachably connected with the aerosol conveying pipeline.
In this embodiment, the internal cross section of the part of the mixer main body 1 coaxially arranged along the air duct pipeline is the same as the internal cross section of the air duct pipeline in shape and size, the air duct butt joint port 2 adopts a flange structure and is consistent with the interface flange specification of the air duct pipeline, and the mixer main body 1 is detachably connected with the air duct pipeline through the air duct butt joint port 2. It should be noted that, if the interface of the duct pipeline adopts other forms, the structure of the interface 2 should be modified correspondingly by the duct, but the purpose and effect are the same, and there is no substantial difference from this embodiment.
In this embodiment, the internal cross section of the part of the main body 1 connected with the aerosol conveying pipeline is the same as the internal cross section of the aerosol conveying pipeline in shape and size, the butt joint port 3 of the aerosol conveying pipeline adopts a flange structure and is consistent with the specification of the joint flange of the aerosol conveying pipeline, and the main body 1 is detachably connected with the aerosol conveying pipeline through the butt joint port 3 of the aerosol conveying pipeline. It should be noted that, if the interface of the aerosol conveying pipeline adopts other forms, the structure of the interface 3 should be modified correspondingly by the aerosol conveying pipeline, but the purpose and effect are the same, and there is no substantial difference from this embodiment.
As shown in fig. 2, the mixer main body 1 in this embodiment includes a gas collecting pipe 4 and a gas distributing pipe 6. The gas collecting pipe 4 is of a symmetrical structure and is arranged outside the mixer main body 1 along the axial direction of the air duct pipeline, and the gas collecting pipe 4 is internally provided with a communicated airflow channel 5 which is fixedly connected with the air duct pipeline and is isolated by a side wall. In this embodiment, the side wall of the joint between the gas collecting pipe 4 and the air duct is shared, so that the structural weight can be further reduced, an independent structure can be adopted, the use effect is not affected, and only the assembly process and the equipment weight are different. The gas collecting pipe 4 is communicated with the butt joint port 3 of the aerosol conveying pipeline through a pipeline which has the same shape and size with the internal section of the aerosol conveying pipeline. In this embodiment, the aerosol delivery pipeline interface 3 is located in the middle of the gas collecting pipe 4, which is beneficial to uniform diffusion.
In this embodiment, the airflow channel 5 is mainly used for transporting aerosol carrier airflow, so that the airflow passes through the gas collecting pipe 4 and the gas distributing pipe 6 and is uniformly sprayed into the air duct. In this embodiment, the cross section of the airflow channel 5 is in an inverted concave shape, so that aerosol carrier airflow can be uniformly distributed to two sides, and the aerosol carrier airflow is uniformly distributed in a longitudinal direction as shown in fig. 3, and then is uniformly distributed in a transverse direction through the airflow pipe 6, and finally is uniformly sprayed into the air duct.
The gas collecting pipe 4 is used for connecting the gas distributing pipe 6 in the embodiment. The cross section area of the gas collecting pipe 4 is large, so that the flow velocity of the internal airflow can be reduced, the on-way resistance and the inertia influence of the airflow flowing are reduced, and the aerosol is uniformly distributed to inlets of the gas distributing pipes 6 according to a flowing route designed by the airflow flow channel 5.
In this embodiment, the gas distribution pipes 6 are hollow pipes with equal cross-section, wherein one end is used for air intake, the other end is closed, every two gas distribution pipes 6 are in a group and arranged in parallel, and the air inlets are arranged in a staggered manner and respectively communicated with different sides of the gas collection pipe 4. The gas distributing pipes 6 are provided with a plurality of groups, the distance between two adjacent groups is equal, and the specific number and the position are determined according to the size of the air duct. The ratio of the equivalent diameter of the two gas distribution pipes 6 in each group to the distance between two adjacent groups is preferably 2. The ratio is mainly considered in two aspects: firstly, flow interference between adjacent gas distribution pipe groups due to too close distance is prevented; secondly, avoid too far, guarantee to arrange sufficient gas distribution pipe in the wind channel cross-section.
The two gas distributing pipes 6 for air inlet on the opposite side are in a group to ensure the dust generating uniformity along the length direction, and the multi-component gas pipes 6 are uniformly distributed on the cross section of the air channel, so that the concentration mixing between the two adjacent gas distributing pipes 6 is realized by utilizing the turbulence characteristic of the blunt body, and the uniformity of the aerosol concentration and the flow speed on the cross section of the air channel can be quickly realized in a short distance.
In this embodiment, the gas distribution pipe 6 is provided with a plurality of injection holes 7 along the length direction, and the aerosol is injected into the air duct through the injection holes 7, so that the multi-point dust emission effect of the cross section of the air duct is realized, the initial contact area of the aerosol and air is increased, the mixing distance is reduced, and the uniformity of the cross section of the aerosol in the air duct is improved. In this embodiment, the opening direction of the injection holes 7 faces away from the incoming flow direction of the air duct, and the number, shape and spacing of the injection holes 7 are set according to actual needs. The number of the injection holes 7 should be as large as possible as the machining process allows, while satisfying that the total orifice area of the injection holes 7 is not smaller than the cross-sectional area of the gas distribution pipe 6.
As shown in fig. 3, in this embodiment, an aerosol carrier fluid F enters the gas collecting pipe 4 through the aerosol conveying pipeline butt joint port 3, and is uniformly distributed and flows to both sides through the airflow channel 5, and then enters the gas distributing pipes 6 distributed in a staggered manner on both sides, and is finally ejected into the air duct from the ejection holes 7, so that the multi-point dust generating effect of the aerosol is achieved. In addition, the air duct fluid can produce the vortex after passing through the gas-distributing pipe 6 surface, and the jet orifice 7 is located the vortex region of gas-distributing pipe 6 to further realize the mixing of aerosol injection position department, can promote wind duct cross-section aerosol concentration and velocity of flow homogeneity in the short distance at last.
The beneficial effects achieved by the specific embodiment are as follows:
adopt the integrated design, compare with prior art, have integrate high, advantages such as mounting means is simple, have solved the bulky problem of current mixing device. Through the design of the spray holes of the gas distribution pipe and the combined distribution of the gas distribution pipe, the beneficial technical effect of improving the concentration and the flow speed uniformity of the aerosol on the cross section of the air duct in a short distance is realized, and compared with the prior art, the air duct has prominent substantive characteristics and remarkable progress.
Claims (7)
1. An air duct aerosol mixer is characterized by comprising a mixer main body (1) and a butt joint port, wherein the butt joint port comprises two air duct butt joint ports (2) and an aerosol conveying pipeline butt joint port (3);
the main body (1) of the mixing machine is of a T-shaped symmetrical structure, two air channel butt joints (2) are same in specification and coaxially arranged and are detachably connected with air channel pipelines on two sides respectively, and one aerosol conveying pipeline butt joint (3) is arranged along the direction vertical to the axis of the air channel pipeline and is detachably connected with the aerosol conveying pipeline;
the inner cross section of the part of the mixer main body (1) which is coaxially arranged along the air duct pipeline is the same as the inner cross section of the air duct pipeline in shape and size, the interface specification of the air duct butt joint port (2) is the same as that of the air duct pipeline, and the mixer main body (1) is detachably connected with the air duct pipeline through the air duct butt joint port (2);
the inner section of the part, connected with the aerosol conveying pipeline, of the mixer main body (1) is the same as the inner section of the aerosol conveying pipeline in shape and size, the butt joint port (3) of the aerosol conveying pipeline is the same as the joint specification of the aerosol conveying pipeline, and the mixer main body (1) is detachably connected with the aerosol conveying pipeline through the butt joint port (3) of the aerosol conveying pipeline;
the mixer main body (1) comprises a gas collecting pipe (4) and a gas distributing pipe (6); the gas collecting pipe (4) is integrally in a symmetrical structure and is arranged on the outer side of the mixer main body (1) along the axial direction of the air channel pipeline, and a communicated airflow channel (5) is arranged inside the gas collecting pipe (4) and is fixedly connected with the air channel pipeline and isolated by a side wall; the gas collecting pipe (4) and the aerosol conveying pipeline butt joint port (3) are communicated through a pipeline which has the same shape and size with the internal section of the aerosol conveying pipeline;
the section of the airflow channel (5) is in an inverted concave shape; the gas collecting pipe (4) is used for connecting a gas distributing pipe (6); the gas distribution pipes (6) are in a hollow tubular shape with uniform cross section, one end of each gas distribution pipe is used for air inlet, the other end of each gas distribution pipe is closed, every two gas distribution pipes (6) are in a group and are arranged in parallel, and the air inlets are arranged in a staggered mode and are respectively communicated with different sides of the gas collecting pipe (4); the gas distributing pipes (6) are provided with a plurality of groups, and the distance between every two adjacent groups is equal;
the air distribution pipe (6) is distributed with a plurality of jet holes (7) along the length direction, the opening direction of the jet holes (7) is back to the air duct incoming flow direction, and aerosol is jetted out from the jet holes (7) to enter the air duct; the total orifice area of the injection orifices (7) is more than or equal to the section area of the gas distribution pipe (6).
2. The air duct aerosol mixer according to claim 1, characterized in that, in the mixer main body (1), the equivalent diameter of two air distribution pipes (6) in the same group is 2 times of the distance between two adjacent groups.
3. The air duct aerosol mixer of claim 1, wherein the injection holes (7) are provided in a vortex region of the gas distribution pipe (6).
4. The air duct aerosol mixer according to any one of claims 1 to 3, wherein the side wall of the joint of the air collecting pipe (4) and the air duct is shared.
5. The air duct aerosol mixer according to any one of claims 1 to 3, wherein the aerosol delivery pipeline butt joint port (3) is located at the middle position of the gas collecting pipe (4).
6. The air duct aerosol mixer according to any one of claims 1 to 3, wherein the air duct butt joint (2) adopts a flange structure, and has the same specification with an interface flange of an air duct pipeline.
7. The air duct aerosol mixer according to any one of claims 1 to 3, wherein the aerosol delivery pipeline butt joint port (3) adopts a flange structure, and has the same specification with an interface flange of the aerosol delivery pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377795.9A CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377795.9A CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
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| Publication Number | Publication Date |
|---|---|
| CN115753319A true CN115753319A (en) | 2023-03-07 |
| CN115753319B CN115753319B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211377795.9A Active CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437163A (en) * | 2014-12-01 | 2015-03-25 | 中国人民解放军军事医学科学院卫生装备研究所 | Integrated aerosol injecting and mixing device |
| CN110285519A (en) * | 2019-06-25 | 2019-09-27 | 北京强度环境研究所 | A kind of dry steam humidifier |
| US20200292405A1 (en) * | 2019-03-14 | 2020-09-17 | Camfil Ab | Aerosol distribution in filter testing systems |
| US20200391233A1 (en) * | 2019-06-13 | 2020-12-17 | Camfil Aktiebolag | Aerosol distribution in filter testing systems |
| CN213749309U (en) * | 2020-11-10 | 2021-07-20 | 唐山同海净化设备有限公司 | High-efficient mixing arrangement is used to aerosol |
-
2022
- 2022-11-04 CN CN202211377795.9A patent/CN115753319B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437163A (en) * | 2014-12-01 | 2015-03-25 | 中国人民解放军军事医学科学院卫生装备研究所 | Integrated aerosol injecting and mixing device |
| US20200292405A1 (en) * | 2019-03-14 | 2020-09-17 | Camfil Ab | Aerosol distribution in filter testing systems |
| US20200391233A1 (en) * | 2019-06-13 | 2020-12-17 | Camfil Aktiebolag | Aerosol distribution in filter testing systems |
| CN110285519A (en) * | 2019-06-25 | 2019-09-27 | 北京强度环境研究所 | A kind of dry steam humidifier |
| CN213749309U (en) * | 2020-11-10 | 2021-07-20 | 唐山同海净化设备有限公司 | High-efficient mixing arrangement is used to aerosol |
Non-Patent Citations (2)
| Title |
|---|
| 李娜;温占波;杨文慧;王洁;胡凌飞;张柯;李劲松;: "一种用于生物气溶胶检测的微环境密闭舱室的研制", 军事医学, no. 01, 25 January 2015 (2015-01-25) * |
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| CN115753319B (en) | 2024-06-04 |
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