Atomized product sampling device and measurement system

Abstract

The application relates to an atomized product sampling device and a measuring system. The atomized product sampling device comprises a two-way electromagnetic valve, a No. 1 three-way pipe, a cascade impactor and a suction member. The No. 1 three-way pipe has a first joint, a second joint and a third joint which are in communication with each other. One end of the two-way electromagnetic valve is used for communicating with the outside atmosphere, and the first joint is detachably connected with the other end of the two-way electromagnetic valve. The second joint is used for detachably connecting with an atomizing device. One end of the cascade impactor is detachably connected with the third joint, and the suction member can communicate with the other end of the cascade impactor. When the two-way electromagnetic valve is powered off, the two-way electromagnetic valve is opened. When the two-way electromagnetic valve is powered on, the two-way electromagnetic valve is closed, so that the liquid drops generated by the atomizing device enter the No. 1 three-way pipe from the second joint and are collected in the No. 1 three-way pipe, and the aerosol particles generated by the atomizing device can flow through the second joint and the third joint into the cascade impactor and are deposited on the collection sheet of the cascade impactor.

Description

Technical Field

[0001] This utility model relates to the field of atomization technology, and in particular to an atomization product sampling device and measurement system. Background Technology

[0002] Atomizing devices are used to generate aerosols. To meet the needs of modern tobacco product development, quality control, and safety assessment, devices for collecting aerosols have been developed for testing. Among these, the particle size distribution of the aerosol is a key indicator for evaluating smoke quality, directly affecting atomization efficiency, component release characteristics, and the user's sensory experience. Currently, testing methods for e-cigarette aerosols mainly draw on detection technologies from other industries, with cascaded impactors being one commonly used measurement device. Based on the principle of inertial separation, the cascaded impactor uses a combination of multi-stage accelerating nozzles and impact plates to collect particles in the aerosol according to their aerodynamic equivalent diameter on each stage of the collection plate, and then obtains the particle size distribution data by weighing. This method is suitable for measuring solid or liquid particles suspended in a gas.

[0003] However, the performance of traditional cascaded impactors relies on the stability and constancy of the airflow, but the aerosol generation process of atomizing devices is usually intermittent. This non-continuous airflow leads to inaccurate test results. Furthermore, traditional cascaded impactors cannot effectively characterize the content of large droplets mixed in the aerosol. Studies have shown that the presence of large droplets may directly affect sensory experiences such as throat hit and the intensity of perceived sweetness, but currently, there is a lack of efficient and accurate methods for quantitatively testing large droplets.

[0004] The above information disclosed in the background art of this application is only for understanding the background of the concept of this application, and does not indicate or imply that it includes information of the prior art. Utility Model Content

[0005] Therefore, it is necessary to provide a sampling device and measurement system for atomized products to address the above problems.

[0006] This application provides a device for sampling atomized products, comprising:

[0007] A two-way solenoid valve, one end of which is used to communicate with the outside atmosphere;

[0008] The No. 1 three-way pipe has a first connector, a second connector and a third connector that are interconnected. The first connector is detachably connected to the other end of the two-way solenoid valve, and the second connector is detachably connected to the atomizing device.

[0009] Cascaded impactors, one end of which is detachably connected to the third connector; and

[0010] A suction component, which is connected to the other end of the cascaded impactor;

[0011] When the two-way solenoid valve is de-energized, it opens and connects to the outside atmosphere. The suction component generates negative pressure, allowing outside air to pass sequentially through the two-way solenoid valve, the first connector, the third connector, and the cascade impactor. When the two-way solenoid valve is energized, it closes and isolates itself from the outside atmosphere. The suction component generates negative pressure, allowing droplets generated by the atomizing device to enter the first three-way tube from the second connector and be collected within the first three-way tube. Additionally, aerosol particles generated by the atomizing device can flow through the second and third connectors into the cascade impactor and deposit on its collection plate.

[0012] The aforementioned atomized product sampling device can achieve at least the following beneficial effects: When the two-way solenoid valve is de-energized and opened, the negative pressure generated by the suction component causes outside air to flow through the entire system, forming a stable airflow; when the two-way solenoid valve is energized and closed, the atomized product sampling device switches to sampling mode. Large droplets generated by the atomizing device impact and deposit on the inner wall of the No. 1 three-way tube under inertial action, while fine aerosol particles enter the cascade impactor with the airflow and are deposited according to particle size. The device adopts a modular design; the No. 1 three-way tube, cascade impactor, two-way solenoid valve, and atomizing device are all detachable, facilitating the separate determination of the mass of large droplets and aerosol particles of different sizes using a weighing method. Specifically, the initial weight of the No. 1 three-way tube can be weighed first. After collecting large droplets in the No. 1 three-way tube, the tube can be removed and its final weight measured. By comparing the difference between the final weight and the initial weight of the No. 1 three-way tube, the weight of the large droplets collected in the No. 1 three-way tube can be obtained. Similarly, the initial weight of each collection plate can be weighed first. After aerosol particles of different sizes are deposited on each collection plate of the cascade impactor, the final weight of each collection plate is weighed. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes to obtain complete mass distribution data, overcoming the measurement errors caused by the escape of large droplets in traditional methods. It is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0013] In some embodiments, the length extension direction of the third connector is parallel to the direction of gravity, and the length extension direction of the third connector is at an acute angle to the length extension direction of the second connector. This structural design, by arranging the third connector along the direction of gravity and tilting the second connector at an acute angle, ensures that the atomizing device maintains an optimal tilt angle during testing, keeping the atomizing core always immersed in the aerosol generation matrix. This effectively prevents dry burning, ensuring the stable generation of aerosols and other atomized products, guaranteeing the reliability of test data, and extending the service life of the atomizing device. Furthermore, this tilted arrangement does not affect the normal transmission and collection of aerosols, achieving a balance between test stability and device safety.

[0014] In some embodiments, the angle between the length extension direction of the third connector and the length extension direction of the second connector is 45 degrees.

[0015] In some embodiments, the atomized product sampling device further includes a three-way solenoid valve disposed between the suction member and the cascade impactor. The three-way solenoid valve has a first end, a second end, and a third end. The first end is connected to the other end of the cascade impactor, the second end is connected to the outside atmosphere, and the third end is connected to the suction member. When the three-way solenoid valve is de-energized, the first end is closed and the second end is open, allowing the suction member to draw in air entering from the second end. When the three-way solenoid valve is energized, the first end is open and the second end is closed, allowing the suction member to draw in airflow from the cascade impactor. When the three-way solenoid valve is de-energized, the first end is closed and the second end is open, allowing the suction member to draw in air entering from the second end (i.e., air is drawn without passing through the cascade impactor). When the three-way solenoid valve is energized, the first end is open and the second end is closed, allowing the suction member to draw in airflow from the cascade impactor (i.e., the airflow passes through the cascade impactor system). This design not only meets the requirements of gas path pretreatment before sampling, but also ensures the airtightness requirements during actual sampling. At the same time, it realizes the automatic switching of operation mode through electromagnetic control, which significantly improves testing efficiency and reduces human operation error.

[0016] In some embodiments, the atomized product sampling device further includes a flow regulating valve and a second three-way pipe located between the three-way solenoid valve and the cascade impactor. The second three-way pipe has a first interface, a second interface, and a third interface that are interconnected. The first interface is connected to the other end of the cascade impactor, the second interface is connected to the outside atmosphere through the flow regulating valve, and the third interface is connected to the first end of the three-way solenoid valve. This design constructs an adjustable split-flow gas path system by adding a flow regulating valve and a second three-way pipe. Since the total flow rate of the pump is fixed, the main gas path flow rate is controlled in reverse by adjusting the branch gas path flow rate, making the inlet flow velocity of the cascade impactor precisely adjustable. A flow meter can also be connected to the inlet of the cascade impactor to monitor the flow rate of the main gas path. Combined with the real-time monitoring function of the flow meter, a closed-loop flow control system is formed. This not only realizes dynamic adjustment of the sampling flow rate to adapt to the needs of different particle size classification, but also avoids the complex structure of electronic flow controllers through mechanical split-flow adjustment, significantly reducing system cost and maintenance difficulty while ensuring flow stability.

[0017] In some embodiments, the atomized product sampling device further includes a filter disposed between the suction component and the third end of the three-way solenoid valve. This design, by placing a filter between the suction component and the three-way solenoid valve (which can be a HEPA filter, or High-Efficiency Particulate Air Filter), effectively intercepts particulate matter and non-gaseous substances in the air path, preventing them from entering the vacuum pump and causing contamination or wear, thereby protecting core components and extending their service life. In the air-pumping mode when the three-way solenoid valve is de-energized, the filter purifies the intake ambient air, preventing external particles from interfering with subsequent sampling results; in the energized sampling mode, it further intercepts tiny particles that may escape from the gas flowing out of the cascade impactor, ensuring air path cleanliness. This filter works in conjunction with the three-way solenoid valve and the flow regulating valve to achieve bidirectional protection without affecting the dynamic balance of the main and branch air paths, ensuring the accuracy of sampling data while reducing system maintenance requirements, making it particularly suitable for high-precision aerosol sampling scenarios requiring long-term stable operation.

[0018] In some embodiments, the atomized product sampling device further includes a control unit for controlling the opening and closing of the two-way solenoid valve and the three-way solenoid valve.

[0019] In some embodiments, the suction element is a vacuum pump.

[0020] This application also provides an atomization product measurement system, which includes an atomizing device and an atomization product sampling device as described in any of the above embodiments.

[0021] Since the above-mentioned atomization product measurement system includes the atomization product sampling device described in any of the above embodiments, the atomization product sampling device can also achieve at least the following beneficial effects: when the two-way solenoid valve is de-energized and opened, the negative pressure generated by the suction component causes outside air to flow through the entire system to form a stable airflow; when the two-way solenoid valve is energized and closed, the atomization product sampling device switches to sampling mode, and the large droplets generated by the atomization device impact and deposit on the inner wall of the No. 1 three-way tube under inertial action, while the fine aerosol particles enter the cascade impactor with the airflow and are deposited according to particle size. The device adopts a modular design, and the No. 1 three-way tube, the cascade impactor, the two-way solenoid valve, and the atomization device can all be disassembled, which facilitates the separate determination of the mass of large droplets and aerosol particles of different sizes by weighing. Specifically, the initial weight of the No. 1 three-way tube can be measured first. After collecting large droplets, the No. 1 three-way tube is removed, and its final weight is measured again. By comparing the difference between the final weight and the initial weight of the No. 1 three-way tube, the weight of the large droplets collected by the No. 1 three-way tube can be obtained. Similarly, the initial weight of each collection plate can be measured first. After aerosol particles of different sizes are deposited on each collection plate of the cascade impactor, the final weight of each collection plate is measured again. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes, obtaining complete mass distribution data. It overcomes the measurement error caused by the escape of large droplets in traditional methods and is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0022] In some embodiments, the atomization product measurement system further includes a weighing device capable of measuring the weight of the No. 1 three-way tube and the weight of the collection plate of the cascade impactor.

[0023] This application also provides a method for testing atomized products, using the aforementioned atomized product sampling device. The method for testing atomized products includes the following steps:

[0024] S10. Start the suction device;

[0025] S30. Energize the two-way solenoid valve;

[0026] S40. De-energize the two-way solenoid valve;

[0027] S60. Measure the weight changes of the first three-way pipe and each stage of the cascade impactor's collection plates, and plot the mass particle size distribution of droplets and aerosol particles of different sizes based on the weight changes of the first three-way pipe and each stage of the cascade impactor's collection plates.

[0028] The above-described method for testing atomized products can achieve at least the following beneficial effects: When the two-way solenoid valve is energized, it is closed, and the first connector of the No. 1 three-way pipe cannot connect to the outside through the two-way solenoid valve. This can be considered as the sampling mode. The atomizing device generates atomized products under the negative pressure of the suction component. The atomized products enter through the second connector of the No. 1 three-way pipe. Large droplets in the atomized products are deposited on the inner wall of the three-way pipe due to inertia, achieving droplet separation. Meanwhile, aerosol particles of different sizes in the atomized products enter the cascade impactor with the airflow for graded deposition. Afterward, the two-way solenoid valve is de-energized, which can be considered as the flushing mode, i.e., the two-way solenoid valve is switched to the open state, allowing outside air to enter the cascade impactor from the first connector through the third connector. This allows residual aerosol particles in the pipeline to fully enter the cascade impactor and deposit on the collection plates at each stage, fully collecting the atomized products to ensure the accuracy of the measurement results. Finally, the initial weight of the No. 1 three-way tube can be weighed first. After collecting large droplets in the No. 1 three-way tube, it can be removed and its final weight measured. By comparing the difference between the final weight and the initial weight of the No. 1 three-way tube, the weight of the large droplets collected by the No. 1 three-way tube can be obtained. Similarly, the initial weight of each collection plate can be weighed first. After aerosol particles of different sizes are deposited on each collection plate of the cascade impactor, the final weight of each collection plate can be weighed. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes to obtain complete mass distribution data, overcoming the measurement error caused by the escape of large droplets in traditional methods. It is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0029] In some embodiments, step S10 of activating the suction device includes: activating the suction device and de-energizing the three-way solenoid valve. When the three-way solenoid valve is de-energized, the first end of the three-way solenoid valve is closed and the second end is open, so that the suction device can draw in air from the second end, i.e., perform a no-air evacuation, where the airflow does not pass through the cascade impactors, and the suction device waits to reach a stable operating state.

[0030] In some embodiments, after step S10 of activating the suction device, the following step is further included: S20, energizing the three-way solenoid valve. After the suction device reaches a stable working state, the three-way solenoid valve is energized, opening the first end and closing the second end, so that the suction device can draw airflow from the cascade impactor. Because the suction device has reached a stable working state, the airflow can pass stably through the cascade impactor system, which is beneficial for the stable delivery, accurate collection, and measurement of subsequent atomized products.

[0031] In some embodiments, after step S40 of de-energizing the two-way solenoid valve, the following step is further included: S50, de-energizing the three-way solenoid valve. Before removing the No. 1 three-way tube and the collection plates of each stage of the cascade impactor for mass measurement of large droplets and aerosol particles of different sizes, the three-way solenoid valve can be de-energized first. The airflow does not pass through the cascade impactor, avoiding the loss of some collected atomized products due to airflow during disassembly, thus ensuring the accuracy of the test results.

[0032] In some embodiments, before step S60, which measures the weight changes of the first three-way tube and each stage of the cascade impactor's collection plates, and plots the mass particle size distribution of droplets and aerosol particles of different sizes based on these weight changes, all preceding steps S10 to S50 are repeated a predetermined number of times. By repeatedly executing steps (S10 to S50), sufficient large droplets and aerosol particles of various sizes are collected for subsequent measurements. Furthermore, the averaging of multiple repeated samples avoids random errors from single sampling, significantly improving the repeatability and accuracy of the test results. This method is suitable for rapid detection of high-concentration aerosols and also meets the requirements for precise analysis of low-concentration samples. This innovative cyclic sampling design allows the testing system to adapt to the detection needs of different aerosol concentrations, greatly improving the applicability and reliability of the method while ensuring data accuracy. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a sampling device for atomized products provided in one embodiment of the present invention.

[0035] Figure 2 This is another structural schematic diagram of an atomized product sampling device provided in one embodiment of the present invention, wherein the dotted line with arrows indicates the airflow direction.

[0036] Figure 3 This is another structural schematic diagram of an atomized product sampling device provided in one embodiment of the present invention, wherein the dotted line with arrows indicates the airflow direction.

[0037] Figure 4This is another structural schematic diagram of an atomized product sampling device provided in one embodiment of the present invention, wherein the dotted line with arrows indicates the airflow direction.

[0038] Figure 5 This is a schematic flowchart of a method for testing atomized products according to an embodiment of the present invention.

[0039] Figure label:

[0040] 10. Atomized product sampling device; 100. Two-way solenoid valve; 200. No. 1 three-way pipe; 210. First connector; 220. Second connector; 230. Third connector; 300. Cascade impactor; 400. Suction component; 500. Three-way solenoid valve; 510. First end; 520. Second end; 530. Third end; 600. Flow regulating valve; 700. No. 2 three-way pipe; 710. First interface; 720. Second interface; 730. Third interface; 800. Filter; 910. Atomizing device; 920. Control unit. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0042] Please see Figure 1In some embodiments, this application provides an atomized product sampling device 10, which includes a two-way solenoid valve 100, a first three-way pipe 200, a cascaded impactor 300, and a suction component 400. The first three-way pipe 200 has a first connector 210, a second connector 220, and a third connector 230 that are interconnected. One end of the two-way solenoid valve 100 is connected to the outside atmosphere, and the first connector 210 is detachably connected to the other end of the two-way solenoid valve 100. The second connector 220 is detachably connected to an atomizing device 910. One end of the cascaded impactor 300 is detachably connected to the third connector 230, and the suction component 400 is connected to the other end of the cascaded impactor 300. The suction component 400 may be, but is not limited to, a vacuum pump. The atomizing device 910 can atomize an aerosol generating matrix to form aerosols and other atomized products. The aerosol generating matrix can refer to a material that can be atomized under certain conditions to provide aerosols and other atomized products. When the two-way solenoid valve 100 is de-energized, it opens and connects to the outside atmosphere. The suction component 400 generates negative pressure to allow outside air to pass sequentially through the two-way solenoid valve 100, the first connector 210, the third connector 230, and the cascade impactor 300. When the two-way solenoid valve 100 is energized, it closes and isolates itself from the outside atmosphere. The suction component 400 generates negative pressure to allow droplets generated by the atomizing device 910 to enter the first three-way tube 200 from the second connector 220 and be collected in the first three-way tube 200. It also allows aerosol particles generated by the atomizing device 910 to flow through the second connector 220 and the third connector 230 into the cascade impactor 300 and be deposited on the collection plate of the cascade impactor 300.

[0043] The aforementioned atomized product sampling device 10 can achieve at least the following beneficial effects: the two-way solenoid valve 100 can conveniently control whether the atomizing device 910 operates to generate atomized products. For example... Figure 3 As shown, when the two-way solenoid valve 100 is de-energized and opened, the negative pressure generated by the suction component 400 causes outside air to flow through the entire system, forming a stable airflow. Figure 4As shown, when the two-way solenoid valve 100 is energized and closed, the atomized product sampling device 10 switches to sampling mode. Large droplets generated by the atomizing device 910 impact and deposit on the inner wall of the first three-way tube 200 under inertial action, while fine aerosol particles enter the cascade impactor 300 with the airflow and are deposited according to particle size. This device adopts a modular design; the first three-way tube 200, the cascade impactor 300, the two-way solenoid valve 100, and the atomizing device 910 are all detachable, facilitating the separate determination of the mass of large droplets and aerosol particles of different sizes using a weighing method. Specifically, the initial weight of the first three-way tube 200 can be weighed first. After the first three-way tube 200 has collected all the large droplets, it can be disassembled, and the final weight of the first three-way tube 200 can be measured. By comparing the difference between the final weight and the initial weight of the first three-way tube 200, the weight of the large droplets collected by the first three-way tube 200 can be obtained. Similarly, the initial weight of each collection plate can be weighed using a weighing device such as an electronic scale. After aerosol particles of different sizes have deposited on each collection plate of the cascade impactor 300, the final weight of each collection plate is weighed. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes, obtaining complete mass distribution data. It overcomes the measurement errors caused by the escape of large droplets in traditional methods and is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0044] like Figure 1 As shown, in some embodiments, the length extension direction of the third connector 230 is parallel to the direction of gravity, and the length extension direction of the third connector 230 is at an acute angle to the length extension direction of the second connector 220. Further, the angle between the length extension direction of the third connector 230 and the length extension direction of the second connector 220 can be 45 degrees. This structural design, by arranging the third connector 230 along the direction of gravity and tilting the second connector 220 at an acute angle, ensures that the atomizing device 910 maintains a optimal tilt angle during testing, ensuring that the atomizing core is always immersed in the aerosol generation matrix. This effectively prevents dry burning, ensuring the stable generation of aerosols and other atomized products, guaranteeing the reliability of test data, and extending the service life of the atomizing device 910. Simultaneously, this tilted arrangement does not affect the normal transmission and collection of aerosols, achieving a balance between test stability and device safety.

[0045] like Figure 1As shown, in some embodiments, the atomized product sampling device 10 further includes a three-way solenoid valve 500 disposed between the suction member 400 and the cascade impactor 300. The three-way solenoid valve 500 has a first end 510, a second end 520, and a third end 530. The first end 510 is connected to the other end of the cascade impactor 300, the second end 520 is used to communicate with the outside atmosphere, and the third end 530 is connected to the suction member 400. When the three-way solenoid valve 500 is de-energized, the first end 510 is closed and the second end 520 is open, so that the suction member 400 can draw in air entering from the second end 520. When the three-way solenoid valve 500 is energized, the first end 510 is open and the second end 520 is closed, so that the suction member 400 can draw in airflow from the cascade impactor 300. Figure 2 As shown, when the three-way solenoid valve 500 is de-energized, the first end 510 of the three-way solenoid valve 500 is closed and the second end 520 is open, so that the suction member 400 can suck up the air entering from the second end 520, that is, perform air evacuation, and the airflow does not pass through the cascade impactor 300, so that the suction member 400 can reach a stable working state. Figure 3 and Figure 4 As shown, when the three-way solenoid valve 500 is energized, its first end 510 opens and its second end 520 closes, allowing the suction member 400 to draw airflow from the cascade impactor 300, meaning the airflow passes through the cascade impactor 300 system. This design satisfies the airflow pretreatment requirements before sampling and ensures airtightness during actual sampling. Furthermore, electromagnetic control enables automated switching of operating modes, significantly improving testing efficiency and reducing human error.

[0046] like Figure 1As shown, in some embodiments, the atomized product sampling device 10 further includes a flow regulating valve 600 and a second three-way pipe 700 disposed between the three-way solenoid valve 500 and the cascade impactor 300. The second three-way pipe 700 has a first interface 710, a second interface 720, and a third interface 730 that are interconnected. The first interface 710 is connected to the other end of the cascade impactor 300, the second interface 720 is connected to the outside atmosphere through the flow regulating valve 600, and the third interface 730 is connected to the first end 510 of the three-way solenoid valve 500. This design constructs an adjustable split-flow gas path system by adding the flow regulating valve 600 and the second three-way pipe 700. Since the total flow rate of the pump is fixed, the main gas path flow rate is controlled in reverse by adjusting the branch gas path flow rate, making the inlet flow rate of the cascade impactor 300 precisely adjustable. A flow meter can also be connected to the inlet of the cascade impactor 300 to monitor the flow rate of the main gas path. Combined with the real-time monitoring function of the flow meter, a closed-loop flow control system is formed. This not only enables dynamic adjustment of the sampled flow rate to adapt to the different particle size classification requirements, but also avoids the complex structure of the electronic flow controller through mechanical diversion adjustment. This significantly reduces system cost and maintenance difficulty while ensuring flow stability.

[0047] like Figure 1 As shown, in some embodiments, the atomized product sampling device 10 further includes a filter 800 disposed between the suction member 400 and the third end 530 of the three-way solenoid valve 500. This design, by placing a filter 800 between the suction member 400 and the three-way solenoid valve 500, can effectively intercept particulate matter and non-gaseous substances in the air path, preventing them from entering the vacuum pump and causing contamination or wear, thereby protecting core components and extending their service life. In the air-pumping mode when the three-way solenoid valve 500 is de-energized, the filter 800 can purify the intake ambient air, avoiding interference from external particles with subsequent sampling results; in the energized sampling mode, it further intercepts tiny particles that may escape from the gas flowing out of the cascade impactor 300, ensuring the cleanliness of the air path. The filter 800 works in conjunction with the three-way solenoid valve 500 and the flow regulating valve 600 to achieve bidirectional protection without affecting the dynamic balance of the main and branch gas flow. This ensures the accuracy of the sampling data and reduces the system maintenance requirements, making it particularly suitable for high-precision aerosol sampling scenarios that require long-term stable operation.

[0048] like Figure 1 As shown, in some embodiments, the atomized product sampling device 10 further includes a control unit 920, which is used to control the opening and closing of the two-way solenoid valve 100 and the three-way solenoid valve 500.

[0049] This application also provides an atomization product measurement system, which includes an atomizing device 910 and an atomization product sampling device 10 as described in any of the above embodiments.

[0050] Since the above-mentioned atomization product measurement system includes the atomization product sampling device 10 described in any of the above embodiments, the atomization product sampling device 10 can also achieve at least the following beneficial effects: when the two-way solenoid valve 100 is de-energized and opened, the negative pressure generated by the suction component 400 causes outside air to flow through the entire system to form a stable airflow; when the two-way solenoid valve 100 is energized and closed, the atomization product sampling device 10 switches to sampling mode, and the large droplets generated by the atomizing device 910 impact and deposit on the inner wall of the first three-way tube 200 under inertial action, while the fine aerosol particles enter the cascade impactor 300 with the airflow and are deposited according to particle size. The device adopts a modular design, and the first three-way tube 200, the cascade impactor 300, the two-way solenoid valve 100, and the atomizing device 910 can all be disassembled, which facilitates the determination of the mass of large droplets and aerosol particles of different sizes by weighing. Specifically, the initial weight of the No. 1 three-way tube 200 can be weighed first. After the No. 1 three-way tube 200 has collected large droplets, it can be removed and its final weight measured. By comparing the difference between the final weight and the initial weight of the No. 1 three-way tube 200, the weight of the large droplets collected by the No. 1 three-way tube 200 can be obtained. Similarly, the initial weight of each collection plate can be weighed first. After aerosol particles of different sizes are deposited on each collection plate of the cascade impactor 300, the final weight of each collection plate can be weighed. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes to obtain complete mass distribution data, overcoming the measurement error caused by the escape of large droplets in traditional methods. It is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0051] In some embodiments, the atomization product measurement system further includes a weighing device capable of measuring the weight of the first three-way tube 200 and the weight of the collection plate of the cascade impactor 300.

[0052] like Figure 5 As shown, this application also provides a method for testing atomized products, wherein the atomized product sampling device 10 described above includes the following steps:

[0053] S10. Start the suction device 400;

[0054] S30. Energize the two-way solenoid valve 100;

[0055] S40. De-energize the two-way solenoid valve 100;

[0056] S60. Measure the weight changes of the first three-way pipe 200 and the collection plates of each stage of the cascade impactor 300, and plot the mass particle size distribution of droplets and aerosol particles of different sizes based on the weight changes of the first three-way pipe 200 and the collection plates of each stage of the cascade impactor 300.

[0057] The above-mentioned method for testing atomized products can achieve at least the following beneficial effects: such as Figure 4 As shown, when the two-way solenoid valve 100 is energized (e.g., energized for 3 seconds), the two-way solenoid valve 100 closes, and the first connector 210 of the first three-way pipe 200 cannot connect to the outside through the two-way solenoid valve 100. This can be considered as the sampling mode. The atomizing device 910 generates atomized products under the negative pressure of the suction element 400. The atomized products enter through the second connector 220 of the first three-way pipe 200. Large droplets in the atomized products are deposited on the inner wall of the three-way pipe due to inertia, achieving droplet separation. Meanwhile, aerosol particles of different sizes in the atomized products enter the cascade impactor 300 with the airflow to achieve graded deposition. Figure 3 As shown, the two-way solenoid valve 100 is then de-energized (e.g., for 2 seconds). This can be considered a flushing mode, where the two-way solenoid valve 100 is switched to the open state, allowing outside air to enter the cascade impactor 300 from the first connector 210 through the third connector 230. This ensures that residual aerosol particles in the pipeline can fully enter the cascade impactor 300 and deposit on each stage of the collection plates, thus fully collecting the atomized products to ensure the accuracy of the measurement results. Finally, the initial weight of the first three-way tube 200 can be weighed first. After the first three-way tube 200 has collected large droplets, it can be removed and its final weight measured again. By comparing the difference between the final weight and the initial weight of the first three-way tube 200, the weight of the large droplets collected by the first three-way tube 200 can be obtained. Similarly, the initial weight of each collection plate can be weighed first. After aerosol particles of different sizes are deposited on each collection plate of the cascade impactor 300, the final weight of each collection plate is weighed. By comparing the difference between the final weight and the initial weight of each collection plate, the weight of aerosol particles of different sizes can be obtained. This design enables full-range sampling from large droplets and aerosol particles of different sizes to obtain complete mass distribution data, overcoming the measurement errors caused by the escape of large droplets in traditional methods. It is particularly suitable for test scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0058] like Figure 2 and Figure 5As shown, in some embodiments, step S10 (starting the suction component 400) includes: starting the suction component 400 and de-energizing the three-way solenoid valve 500. When the three-way solenoid valve 500 is de-energized, the first end 510 of the three-way solenoid valve 500 is closed and the second end 520 is open, so that the suction component 400 can suck up the air entering from the second end 520, that is, perform air evacuation, and the airflow does not pass through the cascade impactor 300, waiting for the suction component 400 to reach a stable working state.

[0059] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, after step S10 (starting the suction device 400), the following step is further included: S20, energizing the three-way solenoid valve 500. After the suction device 400 reaches a stable working state, the three-way solenoid valve 500 can be energized, the first end 510 of the three-way solenoid valve 500 is opened and the second end 520 is closed, so that the suction device 400 can draw airflow from the cascade impactor 300. Because the suction device 400 has reached a stable working state, the airflow can pass stably through the cascade impactor 300 system, which is beneficial for the stable delivery, accurate collection and measurement of subsequent atomized products.

[0060] like Figure 2 and Figure 5 As shown, in some embodiments, after step S40 (de-energizing the two-way solenoid valve 100), the following step is further included: S50, de-energizing the three-way solenoid valve 500 (e.g., de-energizing for 23 seconds). Before removing the collection plates of each stage of the first three-way tube 200 and the cascade impactor 300 for mass measurement of large droplets and aerosol particles of different sizes, the three-way solenoid valve 500 can be de-energized first. The airflow does not pass through the cascade impactor 300, avoiding the loss of some collected atomized products due to airflow during disassembly, thus ensuring the accuracy of the test results.

[0061] like Figure 5As shown, in some embodiments, before step S60 (measuring the weight changes of the collection plates of each stage of the first three-way tube 200 and the cascade impactor 300, and plotting the mass particle size distribution of droplets and aerosol particles of different sizes based on the weight changes of the collection plates of each stage of the first three-way tube 200 and the cascade impactor 300), all preceding steps (such as steps S10 to S50) are repeated a predetermined number of times (e.g., 10 times). By repeatedly executing steps (S10 to S50), on the one hand, sufficient large droplets and aerosol particles of various sizes can be collected for subsequent measurements; on the other hand, the random errors of single sampling can be avoided by averaging through repeated sampling, significantly improving the repeatability and accuracy of the test results. It is suitable for rapid detection of high-concentration aerosols and can also meet the requirements for precise analysis of low-concentration samples. This innovative cyclic sampling design enables the test system to adapt to the detection needs of different concentrations of aerosols, greatly improving the applicability and reliability of the method while ensuring data accuracy.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0064] In the description of this utility model, it should be understood that the terms "axial", "radial", "circumferential", "length", "width", "thickness", "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0068] It should be noted that when an element is referred to as being "attached to," "fixed to," or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0069] In this specification, the use of terms such as "an embodiment," "another implementation," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

Claims

1. A device for sampling atomized products, characterized in that, include: A two-way solenoid valve, one end of which is used to communicate with the outside atmosphere; The No. 1 three-way pipe has a first connector, a second connector and a third connector that are interconnected. The first connector is detachably connected to the other end of the two-way solenoid valve, and the second connector is detachably connected to the atomizing device. A cascaded impactor, one end of which is detachably connected to the third connector; as well as A suction component, which is connected to the other end of the cascaded impactor; When the two-way solenoid valve is de-energized, it opens and connects to the outside atmosphere. The suction component generates negative pressure, allowing outside air to pass sequentially through the two-way solenoid valve, the first connector, the third connector, and the cascade impactor. When the two-way solenoid valve is energized, it closes and isolates itself from the outside atmosphere. The suction component generates negative pressure, allowing droplets generated by the atomizing device to enter the first three-way tube from the second connector and be collected within the first three-way tube. Additionally, aerosol particles generated by the atomizing device can flow through the second and third connectors into the cascade impactor and deposit on its collection plate.

2. The atomized product sampling device according to claim 1, characterized in that, The length extension direction of the third connector is parallel to the direction of gravity, and the length extension direction of the third connector is set at an acute angle to the length extension direction of the second connector.

3. The atomized product sampling device according to claim 2, characterized in that, The angle between the length extension direction of the third connector and the length extension direction of the second connector is 45 degrees.

4. The atomized product sampling device according to any one of claims 1 to 3, characterized in that, The atomized product sampling device further includes a three-way solenoid valve disposed between the suction component and the cascaded impactor. The three-way solenoid valve has a first end, a second end, and a third end. The first end is connected to the other end of the cascaded impactor, the second end is used to connect to the outside atmosphere, and the third end is connected to the suction component. When the three-way solenoid valve is de-energized, the first end is closed and the second end is open, so that the suction component can draw in air entering from the second end. When the three-way solenoid valve is energized, the first end is open and the second end is closed, so that the suction component can draw in airflow from the cascaded impactor.

5. The atomized product sampling device according to claim 4, characterized in that, The atomized product sampling device further includes a flow regulating valve and a second three-way pipe disposed between the three-way solenoid valve and the cascade impactor. The second three-way pipe has a first interface, a second interface and a third interface that are interconnected. The first interface is connected to the other end of the cascade impactor, the second interface is connected to the outside atmosphere through the flow regulating valve, and the third interface is connected to the first end of the three-way solenoid valve.

6. The atomized product sampling device according to claim 4, characterized in that, The atomized product sampling device also includes a filter disposed between the suction component and the third end of the three-way solenoid valve.

7. The atomized product sampling device according to claim 4, characterized in that, The atomized product sampling device also includes a control unit, which is used to control the opening and closing of the two-way solenoid valve and the three-way solenoid valve.

8. The atomized product sampling device according to claim 4, characterized in that, The suction component is a vacuum pump.

9. A system for measuring atomized products, characterized in that, It includes an atomizing device and an atomizing product sampling device as described in any one of claims 1 to 8.

10. The atomization product measurement system according to claim 9, characterized in that, The atomization product measurement system also includes a weighing device, which can be used to measure the weight of the No. 1 three-way tube and the weight of the collection plate of the cascade impactor.

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