Aerosol particle size detection system and sampling device

Abstract

The utility model discloses an aerosol particle size detection system and a sampling device. The aerosol particle size detection system comprises the sampling device and a collision detection device, the sampling device comprises a suction pipeline, a detection pipeline and an adjusting pipeline; the collision detection device comprises a collision sampler and a suction device which are in sealed communication with each other, the other end of the collision sampler is in sealed communication with the air outlet of the detection pipeline, and the suction device is used for sucking aerosol through the detection pipeline at a preset detection flow. The suction pipeline is used for sucking aerosol, and the adjusting pipeline can be used for supplementing air, so that the particle size detection system can directly detect the aerosol while sucking the aerosol, the aerosol does not need to be stored, the loss of the aerosol in the pipeline is reduced, and the detection stability and accuracy are improved.

Description

Technical Field

[0001] This application relates to the field of aerosol detection technology, specifically to an aerosol particle size detection system and a sample introduction device. Background Technology

[0002] Currently, electronic atomization devices typically require online particle size analyzers and impact classifiers for aerosol particle size measurement. When using an impact classifier to measure aerosol particle size, it is usually not possible to pour the aerosol directly into the test window. Instead, a suction device is needed to extract the aerosol from the aerosol generation device and temporarily store it in a pipeline. After storing a certain amount of aerosol, the temporarily stored aerosol is then injected into the impact classifier for testing through a flexible tube. During this process, both the suction device and the pipeline lose some aerosol, which can lead to significant discrepancies between the test results and the actual situation, resulting in poor test stability and accuracy. Utility Model Content

[0003] The main technical problem addressed in this application is the poor stability and accuracy of aerosol detection in related technologies.

[0004] To address the aforementioned technical problems, this application provides an aerosol particle size detection system, including a sample introduction device and a collision detection device. The sample introduction device includes a suction pipe, a detection pipe, and a regulating pipe. The outlet of the suction pipe, the outlet of the regulating pipe, and the inlet of the detection pipe are sealed and connected to each other. The inlet of the suction pipe is connected to an aerosol generating device to receive the aerosol generated by the aerosol generating device. The inlet of the regulating pipe is connected to the outside. An regulating mechanism is provided on the regulating pipe to regulate the airflow rate of the regulating pipe. The collision detection device includes a collision sampler and a suction device that are sealed and connected to each other. The other end of the collision sampler is sealed and connected to the outlet of the detection pipe. The suction device is used to draw the aerosol through the detection pipe at a preset detection flow rate.

[0005] In one embodiment, the sample introduction device further includes a diversion pipeline, the air outlet of the diversion pipeline being sealed and connected to the air outlet of the suction pipeline, and the air inlet of the diversion pipeline being connected to the outside.

[0006] In one embodiment, the sample introduction device further includes at least one drive switch, which is disposed in the aspiration line and / or the shunt line for controlling the on / off state of the aspiration line and / or the shunt line.

[0007] In one embodiment, the regulating mechanism includes a ball valve disposed in the regulating pipeline.

[0008] In one embodiment, the sample introduction device further includes a flow rate detector disposed in the regulating pipeline for detecting the air flow rate within the regulating pipeline.

[0009] In one embodiment, the sample injection device is a one-piece molded structure; or, the sample injection device is formed by splicing multiple components together, and each component is sealed to the other at the splice points.

[0010] In one embodiment, the sample introduction device is made of metallic and / or polymeric materials.

[0011] In one embodiment, in the sample introduction device, at least the aspiration line and the detection line have a transparent structure.

[0012] In one embodiment, the detection pipeline and the regulating pipeline extend horizontally, the air outlet of the suction pipeline is connected to the detection pipeline and the regulating pipeline, and the air inlet of the suction pipeline is located vertically below the air outlet of the suction pipeline.

[0013] This application embodiment also provides a sample introduction device, including a suction line, a detection line, and a regulating line; the air outlet of the suction line, the air outlet of the regulating line, and the air inlet of the detection line are sealed and connected to each other; the air inlet of the suction line is connected to an aerosol generating device for receiving aerosols generated by the aerosol generating device; the air inlet of the regulating line is connected to the outside; the regulating line is provided with a regulating mechanism for regulating the airflow rate of the regulating line; the air outlet of the detection line is sealed and connected to a collision detection device; the collision detection device includes a collision sampler and a suction device that are sealed and connected to each other, and the collision sampler is sealed and connected to the air outlet of the detection line; the suction device is used to suction the aerosol through the detection line at a preset detection flow rate.

[0014] According to the aerosol particle size detection system and sample injection device of the above embodiments, since the suction pipeline extracts aerosols and the adjustment pipeline can replenish air, the particle size detection system can directly detect aerosols while they are being extracted, without the need to store the aerosols, reducing the loss of aerosols in the pipeline and improving the stability and accuracy of the detection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the aerosol particle size detection system in the embodiments of this application.

[0016] Figure 2 This is a schematic diagram of the composition of the sample introduction device in the embodiments of this application.

[0017] Figure 3This is a schematic cross-sectional view of the sample injection device in the embodiments of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Sample introduction device; 11-Aspiration line; 12-Detection line; 13-Regulating line; 14-Regulating mechanism; 15-Splitter line; 16-Drive switch; 17-Flow rate detector;

[0020] 2-Collision detection device; 21-Collision sampler; 22-Suction device. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0022] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0023] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0024] To detect parameters such as particle size of aerosols generated by aerosol generators, impaction classifiers are commonly used in related technologies. Specifically, the detection method involves using a suction device to collect and store the generated aerosols from the aerosol generator, and then injecting the collected aerosols into the impaction classifier for detection. This is because the aerosol flow rate and concentration generated by the aerosol generator are too low to be directly detected by the impaction classifier; a certain amount of aerosol needs to be accumulated before injection. However, during the process of collecting and storing the aerosols and injecting the stored aerosols into the impaction classifier, aerosol residues are generated in the pipeline and within the suction device. Therefore, the actual detection results obtained by the impaction classifier for particle size measurement often differ significantly from the actual composition of the aerosols, resulting in low accuracy and poor detection stability.

[0025] To improve the accuracy and stability of aerosol particle size detection, this application provides an aerosol particle size detection system. Please refer to [link / reference]. Figure 1 The aerosol particle size detection system includes a sample introduction device 1 and a collision detection device 2.

[0026] Among them, such as Figure 2 and Figure 3 As shown, the sample introduction device 1 specifically includes a suction line 11, a detection line 12, and a regulating line 13. To allow aerosol to flow through each line, in this embodiment, the outlet of the suction line 11, the outlet of the regulating line 13, and the inlet of the detection line 12 are sealed and connected to each other. That is, the various lines of the sample introduction device 1 are interconnected. The main difference between the various lines is that different lines correspond to different ports connected to other devices.

[0027] In this embodiment, the air inlet of the suction pipe 11 is connected to the aerosol generating device to receive the aerosol generated by the aerosol generating device. The suction pipe 11 is a pipe used to acquire aerosols; that is, the suction pipe 11 is connected to the aerosol generating device, which can actively or passively generate aerosols for the suction pipe 11 to absorb. Specifically, active aerosol generation means that the aerosol generating device operates and generates aerosols when it is powered on; passive aerosol generation means that, with the suction pipe 11 connected, the suction pipe 11 generates negative pressure to trigger the aerosol generating device to heat and generate aerosols, which are then absorbed by the suction pipe 11. Therefore, the part connected to the suction pipe 11 is the outlet of the aerosol generating device.

[0028] The air inlet of the regulating duct 13 is connected to the outside; a regulating mechanism 14 is provided on the regulating duct 13 to regulate the airflow velocity. Unlike the suction duct 11, the air inlet of the regulating duct 13 is empty and directly connected to the outside atmosphere; therefore, the regulating duct 13 can be used to replenish the outside atmosphere. In order to adjust the flow rate of the air that can flow through the regulating duct 13, a regulating mechanism 14 is provided on the regulating duct 13. This regulating mechanism 14 is used to regulate the flow velocity of the air flowing through the regulating duct 13, thereby realizing the flow rate of the air injected into the regulating duct 13.

[0029] As can be seen, in this embodiment, the suction line 11 and the regulating line 13 in the sample introduction device 1 are both used to extract fluids outside the sample introduction device 1. Specifically, the suction line 11 extracts the aerosol generated by the aerosol generating device, and the regulating line 13 extracts outside air. After extraction, the aerosol and air naturally mix in the sample introduction device 1, forming a mixed fluid of aerosol and air. Since the detection line 12 is connected to both the suction line 11 and the regulating line 13, the mixed fluid of aerosol and air can be discharged through the detection line 12. Because the aerosol discharged from the detection line 12 in this embodiment is a mixture of the aerosol extracted by the aerosol generating device through the suction line 11 and the outside air extracted by the regulating line 13, the aerosol in the detection line 12 has a sufficient flow rate. The collision detection device 2 includes a mutually sealed and connected impact sampler 21 and a suction device 22, and the impact sampler 21 is not connected to the suction device 22. The end is connected to the air outlet of the detection pipeline 12, meaning that the aerosol in the detection pipeline 12 directly enters the impact sampler 21. This means that the aerosol does not need to be accumulated through transfer before entering the impact sampler 21, but is directly mixed with air to increase the fluid flow rate, thereby meeting the detection requirements of the impact sampler 21. This achieves the direct injection of aerosol into the impact sampler 21 for particle size detection without storage, and successfully reduces the loss of aerosol particles during transmission, thus ensuring the accuracy of the detection results and the stability of the detection process.

[0030] In the collision detection device 2, the suction device 22, with a preset detection flow rate, suctions aerosols through the detection pipeline 12. Its working principle is that, through the impact sampler 21, aerosols are extracted from the aerosol generation device via the suction pipeline 11 in the injection device 1, and air is simultaneously drawn from the outside via the regulating pipeline 13 in the injection device 1. In other words, in a single operation, aerosol extraction and the injection of a sufficient amount of aerosol mixed with air into the impact sampler 21 for particle size detection are completed simultaneously. The preset detection flow rate corresponds to the fluid flow rate required by the impact sampler 21. Therefore, the combined flow rate of the suction pipeline 11 and the regulating pipeline 13 in the injection device 1 is equivalent to the suction flow rate corresponding to the impact sampler 21. For the aerosol generation device, the flow rate corresponding to the generated aerosols is relatively fixed and has a certain upper limit; therefore, any insufficient flow rate is supplemented by drawing outside air through the regulating pipeline 13. For example, a typical impact sampler 21 requires an airflow rate of 28.3 L / min. Conventional aerosol generating devices typically have aerosol generation flow rates ranging from approximately 17.5 ml / s to 25 ml / s or 1.05 to 1.5 L / min, which is insufficient to meet the airflow requirements of the impact sampler 21. Therefore, the regulating line 13 can be activated, and the airflow rate within it can be adjusted to 26.8 L / min to 27.25 L / min. This airflow rate, when added to the aerosol flow rate in the suction line 11, meets the airflow requirements of the impact sampler 21, allowing for direct execution of subsequent aerosol particle size detection. Furthermore, the airflow rate in the regulating line 13 can be adjusted accordingly based on variations in the aerosol flow rate emitted by the aerosol generating device.

[0031] In some alternative embodiments, please refer to Figures 1 to 3To allow for flexible control of the aerosol generation device's start and stop, and especially to enable the aerosol generation equipment to be started and stopped at any time, the sample introduction device 1 may further include a diversion pipe 15. The outlet of the diversion pipe 15 is sealed and connected to the outlet of the suction pipe 11, and the inlet of the diversion pipe 15 is connected to the outside. Since the diversion pipe 15 is connected to the suction pipe 11, it is also connected to the suction pipe and the regulating pipe 13. Furthermore, since the inlet of the diversion pipe 15 is connected to the outside, the diversion pipe 15, similar to the regulating pipe 13, can also draw air from the outside. Unlike the regulating line 13, the purpose of the shunt line 15 is to allow for interruption of aerosol particle size detection if necessary. The suction line 11 can be disconnected while the shunt line 15 is connected. Therefore, the suction device 22 changes the aerosol-air mixture to a mixture of air particles, preventing negative pressure from forming in the sample injection device 1 when the suction line 11 is closed alone. Correspondingly, to control the on / off state between the suction line 11 and the shunt line 15, the sample injection device 1 may also include at least one drive switch 16. The drive switch 16 is located in the suction line 11 and / or the shunt line 15 to control their on / off states. Specifically, the drive switch 16 can be an electronic valve that selectively controls the opening and closing of the suction line 11 / shunt line 15, thereby controlling the detection time for aerosols.

[0032] In some alternative embodiments, please refer to Figure 1 and Figure 2 To facilitate control of the airflow rate in the regulating pipe 13, the regulating mechanism 14 may specifically include a ball valve, which is disposed in the regulating pipe 13. By controlling the ball valve, the airflow rate flowing through the regulating mechanism 14 can be adjusted. Specifically, under the premise that the airflow rate required for the impact sampler 21 remains constant, if the flow rate of aerosol generated by the aerosol generating device increases, then the ball valve can be controlled to correspondingly reduce the airflow rate in the regulating pipe 13; if the flow rate of aerosol generated by the aerosol generating device decreases, then the ball valve can be controlled to correspondingly increase the airflow rate in the regulating pipe 13. This ensures that the sample injection device 1 will not generate negative pressure due to insufficient external airflow, nor will it be unable to draw aerosol from the aerosol generating device due to excessive external airflow.

[0033] In some alternative embodiments, please refer to Figure 1To ensure detection accuracy, especially to ensure the gas flow rate in the injection device 1 meets the requirements of the impact sampler 21, the injection device 1 may also include a flow rate detector 17. The flow rate detector 17 is disposed in the regulating pipe 13 and is used to detect the air flow rate in the regulating pipe 13. Since the flow rate detector 17 is disposed in the regulating pipe 13, the air flow rate in the regulating pipe 13 can be detected, and the air flow rate in the regulating pipe 13 can be adjusted accordingly based on the detection results.

[0034] In some alternative embodiments, please refer to Figure 2 To ensure the sealing performance of the entire injection device 1, the injection device 1 can be a one-piece molded structure; or, to reduce manufacturing difficulty, the injection device 1 can also be formed by splicing multiple parts together, with each part sealing against the others at the joints. Specifically, elastic sealing elements, including silicone parts, can be used at the joints of the various parts of the injection device 1 to ensure the sealing performance of the injection device 1.

[0035] In some alternative embodiments, since the aerosol is in a high-temperature state after it is generated, in order to ensure the durability and structural strength of the sample introduction device 1, the sample introduction device 1 can be made of metal and / or polymer materials.

[0036] In some optional embodiments, to facilitate observation of the real-time state of the aerosol in the sample introduction device 1, at least the suction line 11 and the detection line 12 in the sample introduction device 1 may have a transparent structure. Because the suction line 11 and the detection line 12 have a transparent structure, the user can directly observe the real-time state of the aerosol in the sample introduction device 1 from the outside using the naked eye or a camera device, including flow rate, color, etc. This allows for observation-assisted detection and timely handling of any abnormalities.

[0037] In some alternative embodiments, to prevent aerosol escape, the detection line 12 and the regulating line 13 extend horizontally, the outlet of the suction line 11 is connected to the detection line 12 and the regulating line 13, and the inlet of the suction line 11 is vertically located below the outlet of the suction line 11. In use, the suction line 11 is set vertically, so that aerosols only enter the sample introduction device 1 along the suction line 11 during the suction process of the aerosol generating device.

[0038] According to the aerosol particle size detection system of the present application embodiment, since the suction pipe 11 extracts aerosol and the regulating pipe 13 can replenish air, the particle size detection system can directly detect aerosol while it is being extracted, without the need to store the aerosol, reducing the loss of aerosol in the pipe and improving the stability and accuracy of the detection.

[0039] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. An aerosol particle size detection system, characterized in that, Includes a sample introduction device and a collision detection device; The sample introduction device includes a suction line, a detection line, and an adjustment line, wherein the air outlet of the suction line, the air outlet of the adjustment line, and the air inlet of the detection line are sealed and connected to each other. The air inlet of the suction pipe is connected to the aerosol generating device and is used to receive the aerosol generated by the aerosol generating device. The air inlet of the regulating pipe is connected to the outside; the regulating pipe is equipped with an regulating mechanism for regulating the air flow rate of the regulating pipe. The collision detection device includes a collision sampler and a suction device that are sealed and connected to each other. The other end of the collision sampler is sealed and connected to the air outlet of the detection pipeline. The suction device is used to suction the aerosol through the detection pipeline at a preset detection flow rate.

2. The aerosol particle size detection system as described in claim 1, characterized in that, The sample introduction device also includes a diversion pipeline, the air outlet of which is sealed and connected to the air outlet of the suction pipeline, and the air inlet of which is connected to the outside.

3. The aerosol particle size detection system as described in claim 2, characterized in that, The sample introduction device further includes at least one drive switch, which is disposed in the aspiration line and / or the shunt line, and is used to control the on / off state of the aspiration line and / or the shunt line.

4. The aerosol particle size detection system according to any one of claims 1-3, characterized in that, The regulating mechanism includes a ball valve, which is disposed in the regulating pipeline.

5. The aerosol particle size detection system as described in claim 4, characterized in that, The sample introduction device also includes a flow rate detector, which is disposed in the regulating pipeline and is used to detect the air flow rate in the regulating pipeline.

6. The aerosol particle size detection system according to any one of claims 1-3, characterized in that, The sample injection device is a one-piece molded structure; or, the sample injection device is formed by splicing multiple components together, and each component is sealed to the other at the splice points.

7. The aerosol particle size detection system according to any one of claims 1-3, characterized in that, The sample introduction device is made of metallic and / or polymeric materials.

8. The aerosol particle size detection system according to any one of claims 1-3, characterized in that, In the sample introduction device, at least the aspiration line and the detection line have a transparent structure.

9. The aerosol particle size detection system according to any one of claims 1-3, characterized in that, The detection pipeline and the regulating pipeline extend horizontally, the air outlet of the suction pipeline is connected to the detection pipeline and the regulating pipeline, and the air inlet of the suction pipeline is located vertically below the air outlet of the suction pipeline.

10. A sample introduction device, characterized in that, This includes suction tubing, detection tubing, and regulating tubing; The air outlet of the suction pipe, the air outlet of the regulating pipe, and the air inlet of the detection pipe are sealed and connected to each other. The air inlet of the suction pipe is connected to the aerosol generating device and is used to receive the aerosol generated by the aerosol generating device. The air inlet of the regulating pipe is connected to the outside; the regulating pipe is equipped with an regulating mechanism for regulating the air flow rate of the regulating pipe. The air outlet of the detection pipeline is sealed and connected to the collision detection device; the collision detection device includes an impact sampler and a suction device that are sealed and connected to each other, and the impact sampler is sealed and connected to the air outlet of the detection pipeline. The suction device is used to suction the aerosol through the detection pipeline at a preset detection flow rate.

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