Atomization product sampling device, measurement system and test method

Abstract

The invention relates to an atomized product sampling device, a measuring system and a testing method. The atomized product sampling device comprises a two-way electromagnetic valve, a first three-way pipe, a cascade impactor and a suction part. The first three-way pipe is provided with a first connector, a second connector and a third connector which are communicated with one another, one end of the two-way electromagnetic valve is used for being communicated with the outside atmosphere, and the first connector is detachably connected with the other end of the two-way electromagnetic valve; the second joint is used for being detachably connected with an atomization device; one end of the cascade impactor is detachably connected with the third connector, and the suction part 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 liquid drops generated by the atomization device enter the first three-way pipe from the second connector and are collected in the first three-way pipe, and aerosol particles generated by the atomization device can flow through the second connector and the third connector, enter the cascade impactor and are deposited on a collecting piece of the cascade impactor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of atomization, in particular to an atomization product sampling device, a measuring system and a testing method. BACKGROUND

[0002] An atomization device is a device for generating aerosol, in order to meet the needs of modern tobacco product research and development, quality control and safety evaluation, a device for collecting aerosol is derived to facilitate testing. Among them, the particle size distribution of aerosol is one of the key indicators for evaluating smoke quality, which directly affects the atomization efficiency, component release characteristics and user's sensory experience. At present, the test method of electronic cigarette aerosol mainly borrows detection technology from other industries, among which the cascade impactor is one of the commonly used measuring equipment. The cascade impactor is based on the principle of inertial separation, which collects particles in the aerosol on the collection plate of each stage according to their aerodynamic equivalent diameter through the combination of multi-stage accelerating nozzle and impact plate, and then obtains the particle size distribution data by weighing. This method is suitable for the measurement of solid or liquid particles suspended in gas.

[0003] However, the performance of the cascade impactor used in the conventional scheme depends on the stability and constancy of the airflow, but the process of generating aerosol by the atomization device is usually intermittent, and such non-continuous airflow will lead to inaccuracy of the test results. Moreover, the cascade impactor used in the conventional scheme cannot effectively characterize the large droplet content mixed in the aerosol. Studies have shown that the presence of large droplets may directly affect the sensory experience such as throat hit and sweetness perception intensity, but there is currently a lack of efficient and accurate testing means for quantitative testing of large droplets.

[0004] The above information disclosed in the background of the present application is only for understanding the background of the present application concept, and does not indicate or imply that it contains prior art information. SUMMARY

[0005] Therefore, it is necessary to provide an atomization product sampling device, an atomization product measuring system and an atomization product testing method in view of the above problems.

[0006] The present application provides an atomization product sampling device, which comprises:

[0007] A two-way electromagnetic valve, one end of the two-way electromagnetic valve being used for communication with the outside atmosphere;

[0008] A first three-way pipe having a first joint, a second joint and a third joint in communication with each other, the first joint being detachably connected with the other end of the two-way electromagnetic valve, and the second joint being used for detachable connection with the atomization device;

[0009] A cascade impactor, one end of the cascade impactor being detachably connected with the third joint; and

[0010] a suction member capable of communicating with the other end of the cascade impactor;

[0011] When the two-way electromagnetic valve is de-energized, the two-way electromagnetic valve is opened and communicates with the external atmosphere, and the suction member can generate negative pressure to make the external air pass through the two-way electromagnetic valve, the first joint, the third joint and the cascade impactor in turn; when the two-way electromagnetic valve is energized, the two-way electromagnetic valve is closed and isolated from the external atmosphere, and the suction member can generate negative pressure to make the liquid droplets generated by the atomization device enter the first three-way pipe from the second joint and be collected in the first three-way pipe, and make the aerosol particles generated by the atomization device flow through the second joint and the third joint into the cascade impactor and be deposited on the collection sheets of the cascade impactor.

[0012] The above-mentioned atomized product sampling device can at least achieve the following beneficial effects: when the two-way electromagnetic valve is de-energized and opened, the negative pressure generated by the suction member makes the external air flow through the entire system to form a stable air flow; when the two-way electromagnetic valve is energized and closed, the atomized product sampling device switches to the sampling mode, and the large liquid droplets generated by the atomization device are deposited on the inner wall of the first three-way pipe under the action of inertia, while the fine aerosol particles enter the cascade impactor along with the air flow and are deposited according to particle size. The device adopts modular design, and the first three-way pipe and the cascade impactor, the two-way electromagnetic valve and the atomization device can be detached, which facilitates the determination of the mass of large liquid droplets and aerosol particles of different particle sizes by the weighing method respectively. Specifically, the initial weight of the first three-way pipe can be weighed first, and after the large liquid droplets are collected in the first three-way pipe, the first three-way pipe is detached and the final weight of the first three-way pipe is measured, and by comparing the difference between the final weight and the initial weight of the first three-way pipe, the weight of the large liquid droplets collected in the first three-way pipe can be obtained. Similarly, the initial weights of the collection sheets at each stage can be weighed first, and after the aerosol particles of different particle sizes are deposited on the collection sheets at each stage of the cascade impactor, the final weights of the collection sheets at each stage are measured, and by comparing the difference between the final weight and the initial weight of the collection sheets at each stage, the weights of the aerosol particles of different particle sizes can be obtained. This design realizes full-range sampling of large liquid droplets and aerosol particles of different particle sizes, obtains complete mass distribution data, overcomes the measurement error caused by the escape of large liquid droplets in the traditional method, and is particularly suitable for testing scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0013] In some embodiments, the length extension direction of the third joint is parallel to the direction of gravity, and the length extension direction of the third joint is at an acute angle to the length extension direction of the second joint. This design ensures that the atomization device maintains a better inclination angle during testing, so that the atomization core is always immersed in the aerosol generating substrate, effectively preventing dry burning and ensuring the stable generation of aerosol and other atomized products, thereby ensuring the reliability of the test data and prolonging the service life of the atomization device. At the same time, this inclined arrangement does not affect the normal transmission and collection of aerosol, achieving the unity of test stability and device safety.

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

[0015] In some embodiments, the atomized product sampling device further comprises a three-way electromagnetic valve arranged between the suction member and the cascade impactor, the three-way electromagnetic valve having a first end, a second end and a third end, the first end being in communication with the other end of the cascade impactor, the second end being used to communicate with the external atmosphere, and the third end being in communication with the suction member; when the three-way electromagnetic valve is de-energized, the first end is closed and the second end is opened, so that the suction member can suck air entering from the second end; when the three-way electromagnetic valve is energized, the first end is opened and the second end is closed, so that the suction member can suck the airflow from the cascade impactor. When the three-way electromagnetic valve is de-energized, the first end of the three-way electromagnetic valve is closed and the second end is opened, so that the suction member can suck air entering from the second end, i.e. air suctioning air, and the airflow does not pass through the cascade impactor; when the three-way electromagnetic valve is energized, the first end of the three-way electromagnetic valve is opened and the second end is closed, so that the suction member can suck the airflow from the cascade impactor, i.e. the airflow passes through the cascade impactor system. This design not only meets the gas path pretreatment requirement before sampling, but also ensures the air tightness requirement during actual sampling. At the same time, the automatic switching of the operation mode is realized through electromagnetic control, which significantly improves the test efficiency and reduces the human operation error.

[0016] In some embodiments, the atomized product sampling device further comprises a flow regulating valve and a second three-way pipe arranged between the three-way electromagnetic valve and the cascade impactor, the second three-way pipe having a first interface, a second interface and a third interface in communication with each other, the first interface being in communication with the other end of the cascade impactor, the second interface being in communication with the outside atmosphere through the flow regulating valve, and the third interface being in communication with the first end of the three-way electromagnetic valve. The design builds an adjustable shunt gas path system by adding the flow regulating valve and the second three-way pipe. Since the total flow of the pump is fixed, the main gas path flow is reversely controlled by adjusting the branch gas path flow, so that the inlet flow rate of the cascade impactor is accurately adjustable. A flowmeter can also be connected at the inlet of the cascade impactor to monitor the flow of the main gas path. In combination with the real-time monitoring function of the flowmeter, a closed-loop flow control system is formed, which not only realizes dynamic adjustment of the sampling flow to adapt to different particle size classification requirements, but also avoids the complex structure of the electronic flow controller through mechanical shunt adjustment, thereby significantly reducing the system cost and maintenance difficulty while ensuring the stability of the flow.

[0017] In some embodiments, the atomized product sampling device further comprises a filter arranged between the suction member and the third end of the three-way electromagnetic valve. The design sets the filter, which can be a HEPA filter (High-Efficiency Particulate Air Filter), between the suction member and the three-way electromagnetic valve, so as to effectively intercept particulate matters and non-gas phase substances in the gas path and prevent them from entering the vacuum pump to cause pollution or wear, thereby protecting the core components and prolonging the service life. In the air suction mode when the three-way electromagnetic valve is powered off, the filter can purify the inhaled ambient air to avoid external particles from interfering with the subsequent sampling results. In the sampling mode when the three-way electromagnetic valve is powered on, the filter further intercepts the tiny particles that may escape from the gas flowing out of the cascade impactor, ensuring the cleanliness of the gas path. The filter works in cooperation with the three-way electromagnetic valve and the flow regulating valve to realize bidirectional protection without affecting the dynamic balance of the main and branch gas path flows, thereby ensuring the accuracy of the sampling data and reducing the system maintenance requirements, especially suitable for high-precision aerosol sampling scenarios that need to be operated stably for a long time.

[0018] In some embodiments, the atomized product sampling device further comprises a control unit configured to control the opening and closing of the two-way electromagnetic valve and the opening and closing of the three-way electromagnetic valve.

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

[0020] The present application also provides an atomized product measuring system comprising an atomization device and an atomized product sampling device according to any one of the above embodiments.

[0021] The above-mentioned atomized product measuring system comprises the above-mentioned atomized product sampling device of any one of the above-mentioned embodiments, and the atomized product sampling device can also at least achieve the following beneficial effects: when the two-way electromagnetic valve is opened by being powered off, the negative pressure generated by the suction member causes external air to flow through the entire system to form a stable air flow; when the two-way electromagnetic valve is closed by being powered on, the atomized product sampling device switches to a sampling mode, and large droplets generated by the atomizing device impact and deposit on the inner wall of the No. 1 three-way pipe under the action of inertia, and fine aerosol particles enter the cascade impactor along with the air flow and are classified and deposited according to particle size. The device adopts a modular design, and the No. 1 three-way pipe and the cascade impactor, the two-way electromagnetic valve and the atomizing device can be detached, so that the mass of the large droplets and the aerosol particles of different particle sizes can be respectively measured by a weighing method. Specifically, the initial weight of the No. 1 three-way pipe can be weighed first, the No. 1 three-way pipe is detached after the large droplets are collected in the No. 1 three-way pipe, and the final weight of the No. 1 three-way pipe is measured, and the weight of the large droplets collected in the No. 1 three-way pipe can be obtained by comparing the difference between the final weight and the initial weight of the No. 1 three-way pipe. Similarly, the initial weights of the collection sheets at different stages can be weighed first, and the final weights of the collection sheets at different stages are measured after the aerosol particles of different particle sizes are deposited on the collection sheets at different stages of the cascade impactor, and the weights of the aerosol particles of different particle sizes can be obtained by comparing the difference between the final weights and the initial weights of the collection sheets at different stages. This design realizes full-range sampling of the large droplets and the aerosol particles of different particle sizes, obtains complete mass distribution data, overcomes the measurement error caused by the escape of large droplets in the traditional method, and is particularly suitable for testing scenarios that need to comprehensively characterize the particle size distribution of atomized products.

[0022] In some embodiments, the atomized product measuring system further comprises a weighing device, which can be used to measure the weight of the No. 1 three-way pipe and the collection sheets of the cascade impactor.

[0023] The present application also provides an atomized product testing method, which comprises the above-mentioned atomized product sampling device, and the atomized product testing method comprises the following steps:

[0024] starting the suction member;

[0025] powering on the two-way electromagnetic valve;

[0026] powering off the two-way electromagnetic valve;

[0027] measuring the weight change of the No. 1 three-way pipe and the collection sheets of the cascade impactor, and drawing a mass-particle size distribution diagram of droplets and aerosol particles of different particle sizes according to the weight change of the No. 1 three-way pipe and the collection sheets of the cascade impactor.

[0028] The above atomization product testing method can achieve at least the following beneficial effects: when the two-way electromagnetic valve is powered on, the two-way electromagnetic valve is closed, and the first joint of the first three-way pipe cannot communicate with the outside through the two-way electromagnetic valve, which can be considered as a sampling mode. The atomization device generates atomization products under the negative pressure of the suction member. The atomization products enter through the second joint of the first three-way pipe. Large droplets in the atomization products deposit on the inner wall of the three-way pipe due to inertia to achieve droplet separation, and aerosol particles of different particle sizes in the atomization products enter the cascade impactor along with the airflow to achieve staged deposition. Then, the two-way electromagnetic valve is powered off, which can be considered as a flushing mode. That is, the two-way electromagnetic valve is switched to an open state, so that external air can enter the cascade impactor from the first joint through the third joint, so that the residual aerosol particles in the pipeline can enter the cascade impactor and deposit on the collection sheets of each stage, and the atomization products are fully collected to ensure the accuracy of the measurement results. Finally, the initial weight of the first three-way pipe can be measured first. After the large droplets are collected in the first three-way pipe, the first three-way pipe is removed and the final weight of the first three-way pipe is measured. By comparing the difference between the final weight and the initial weight of the first three-way pipe, the weight of the large droplets collected by the first three-way pipe can be obtained. Similarly, the initial weights of the collection sheets of each stage can be measured first. After the aerosol particles of different particle sizes are deposited on the collection sheets of each stage of the cascade impactor, the final weights of the collection sheets of each stage are measured. By comparing the difference between the final weight and the initial weight of the collection sheets of each stage, the weight of the aerosol particles of different particle sizes can be obtained. This design realizes full-range sampling of large droplets and aerosol particles of different particle sizes, obtains complete mass distribution data, overcomes the measurement error caused by the escape of large droplets in the traditional method, and is particularly suitable for testing scenarios that require comprehensive characterization of the particle size distribution of atomization products.

[0029] In some embodiments, the starting the suction member includes starting the suction member and powering off the three-way electromagnetic valve. When the three-way electromagnetic valve is powered off, the first end of the three-way electromagnetic valve is closed and the second end is open, so that the suction member can suck air entering from the second end, i.e. air suction, and the airflow does not pass through the cascade impactor, and the suction member waits to reach a stable working state.

[0030] In some embodiments, after the starting the suction member, the method further includes the step of powering on the three-way electromagnetic valve. After the suction member reaches a stable working state, the three-way electromagnetic valve can be powered on. The first end of the three-way electromagnetic valve is open and the second end is closed, so that the suction member can suck the airflow from the cascade impactor. Because the suction member has reached a stable working state, the airflow can stably pass through the cascade impactor system, which is conducive to the stable delivery, accurate collection and measurement of subsequent atomization products.

[0031] In some embodiments, the method further comprises the step of de-energizing the three-way electromagnetic valve after de-energizing the two-way electromagnetic valve. The three-way electromagnetic valve can be de-energized before the first three-way tube and the collection pieces of each stage of the cascade impactor are removed for measuring the mass of large droplets and aerosol particles of different sizes. In this way, the airflow does not pass through the cascade impactor during the removal process, so that the collected aerosol particles are not affected by the airflow and are not lost, thereby ensuring the accuracy of the test results.

[0032] In some embodiments, the method further comprises the step of repeating all the preceding steps a predetermined number of times before measuring the weight changes of the first three-way tube and the collection pieces of each stage of the cascade impactor, and drawing the mass size distribution graph of droplets and aerosol particles of different sizes according to the weight changes of the first three-way tube and the collection pieces of each stage of the cascade impactor. By repeating the steps multiple times, on the one hand, enough large droplets and aerosol particles of different sizes can be collected for subsequent measurement, and on the other hand, the accidental errors of a single sampling can be avoided by averaging multiple repeated samplings, thereby significantly improving the repeatability and accuracy of the test results. This innovative cyclic sampling design makes the test system adaptable to the detection requirements of aerosols of different concentrations, greatly improves the applicability and reliability of the method while ensuring the accuracy of the data. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0034] Figure 1 A structural schematic diagram of the atomized product sampling device provided by an embodiment of the present application.

[0035] Figure 2 Another structural schematic diagram of the atomized product sampling device provided by an embodiment of the present application, in which the dashed line with an arrow can indicate the airflow direction.

[0036] Figure 3 Another structural schematic diagram of the atomized product sampling device provided by an embodiment of the present application, in which the dashed line with an arrow can indicate the airflow direction.

[0037] Figure 4 Another structural schematic diagram of the atomized product sampling device provided by an embodiment of the present application, in which the dashed line with an arrow can indicate the airflow direction.

[0038] Figure 5 A flow chart of the atomized product testing method provided by one embodiment of the present application is shown in the figure.

[0039] Reference signs:

[0040] 10, atomized product sampling device; 100, two-way electromagnetic valve; 200, first three-way pipe; 210, first joint; 220, second joint; 230, third joint; 300, cascade impactor; 400, suction member; 500, three-way electromagnetic valve; 510, first end; 520, second end; 530, third end; 600, flow regulating valve; 700, second three-way pipe; 710, first interface; 720, second interface; 730, third interface; 800, filter; 910, atomizing device; 920, control unit. DETAILED DESCRIPTION

[0041] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar modifications can be made by those skilled in the art in the light of the foregoing description. Therefore, it is not intended to limit the present application to the following specific embodiments disclosed herein, but to cover all modifications falling within the scope of the present application.

[0042] Please refer to Figure 1In some embodiments, the present application provides an atomized product sampling device 10, which comprises a two-way electromagnetic valve 100, a first three-way pipe 200, a cascade impactor 300 and a suction member 400. The first three-way pipe 200 has a first joint 210, a second joint 220 and a third joint 230 in communication with each other, one end of the two-way electromagnetic valve 100 is used for communication with the external atmosphere, the first joint 210 is detachably connected to the other end of the two-way electromagnetic valve 100; the second joint 220 is used for detachable connection with an atomization device 910; one end of the cascade impactor 300 is detachably connected to the third joint 230, and the other end of the cascade impactor 300 is in communication with the suction member 400. Wherein, the suction member 400 can be but is not limited to a vacuum pump; the atomization device 910 can atomize an aerosol generating substrate to form an aerosol or other atomized product, and the aerosol generating substrate can refer to a material that can be atomized under certain conditions to provide an aerosol or other atomized product. When the two-way electromagnetic valve 100 is powered off, the two-way electromagnetic valve 100 is opened and in communication with the external atmosphere, and the suction member 400 can generate a negative pressure to make the external air pass through the two-way electromagnetic valve 100, the first joint 210, the third joint 230 and the cascade impactor 300 in sequence; when the two-way electromagnetic valve 100 is powered on, the two-way electromagnetic valve 100 is closed and isolated from the external atmosphere, and the suction member 400 can generate a negative pressure to make the droplets generated by the atomization device 910 enter the first three-way pipe 200 from the second joint 220 and be collected in the first three-way pipe 200, and make the aerosol particles generated by the atomization device 910 flow through the second joint 220 and the third joint 230 into the cascade impactor 300 and be deposited on the collection sheet of the cascade impactor 300.

[0043] The atomized product sampling device 10 described above can at least achieve the following beneficial effects: the two-way electromagnetic valve 100 can be used to very conveniently control whether the atomization device 910 works to generate atomized products. As shown in Figure 3 When the two-way electromagnetic valve 100 is powered off and opened, the negative pressure generated by the suction member 400 makes the external air flow through the entire system to form a stable air flow. As shown in Figure 4As shown, when the two-way electromagnetic valve 100 is powered off, the atomized product sampling device 10 is switched to the sampling mode, and the large droplets generated by the atomization device 910 impact and deposit on the inner wall of the first three-way pipe 200 under the action of inertia, 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 pipe 200 and the cascade impactor 300, the two-way electromagnetic valve 100, and the atomization device 910 can be detached, which facilitates the determination of the mass of large droplets and aerosol particles of different particle sizes by weighing method. Specifically, the initial weight of the first three-way pipe 200 can be weighed first, the first three-way pipe 200 is detached after the collection of large droplets in the first three-way pipe 200, and the final weight of the first three-way pipe 200 is measured, and the difference between the final weight and the initial weight of the first three-way pipe 200 can be obtained. Similarly, the initial weight of each stage of collection sheet can be weighed by using an electronic scale or other weighing device, and the final weight of each stage of collection sheet can be weighed after the aerosol particles of different particle sizes are deposited on each stage of collection sheet in the cascade impactor 300, and the difference between the final weight and the initial weight of each stage of collection sheet can be obtained. This design realizes full-range sampling of large droplets and aerosol particles of different particle sizes, obtains complete mass distribution data, overcomes the measurement error caused by the escape of large droplets in the traditional method, and is particularly suitable for testing scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0044] As shown in Figure 1 In some embodiments, the length extension direction of the third joint 230 is parallel to the direction of gravity, and the length extension direction of the third joint 230 is arranged at an acute angle with the length extension direction of the second joint 220. Further, the included angle between the length extension direction of the third joint 230 and the length extension direction of the second joint 220 can be 45 degrees. This structure design ensures that the atomization device 910 maintains a better inclination angle during the test by arranging the third joint 230 along the direction of gravity and tilting the second joint 220 at an acute angle, so that the atomization core is always immersed in the aerosol generating substrate, effectively preventing the occurrence of dry burning phenomenon, not only ensuring the stable generation of aerosol and the like atomized products, guaranteeing the reliability of the test data, but also prolonging the service life of the atomization device 910. At the same time, this inclined arrangement does not affect the normal transmission and collection of aerosol, realizing the unity of test stability and device safety.

[0045] As shown in Figure 1As shown, in some embodiments, the atomized product sampling device 10 further comprises a three-way electromagnetic valve 500 disposed between the suction member 400 and the cascade impactor 300, the three-way electromagnetic valve 500 having a first end 510, a second end 520 and a third end 530, the first end 510 being in communication with the other end of the cascade impactor 300, the second end 520 being used to communicate with the external atmosphere, and the third end 530 being in communication with the suction member 400; when the three-way electromagnetic valve 500 is de-energized, the first end 510 is closed and the second end 520 is opened, so that the suction member 400 can suck the air entering from the second end 520; when the three-way electromagnetic valve 500 is energized, the first end 510 is opened and the second end 520 is closed, so that the suction member 400 can suck the airflow from the cascade impactor 300. As Figure 2 As shown, when the three-way electromagnetic valve 500 is de-energized, the first end 510 of the three-way electromagnetic valve 500 is closed and the second end 520 is opened, so that the suction member 400 can suck the air entering from the second end 520, i.e. the air is sucked, and the airflow does not pass through the cascade impactor 300, so as to make the suction member 400 reach a stable working state. As Figure 3 and Figure 4 As shown, when the three-way electromagnetic valve 500 is energized, the first end 510 of the three-way electromagnetic valve 500 is opened and the second end 520 is closed, so that the suction member 400 can suck the airflow from the cascade impactor 300, i.e. the airflow passes through the cascade impactor 300 system. This design not only meets the gas path pretreatment requirement before sampling, but also guarantees the air tightness requirement during actual sampling, and at the same time realizes the automatic switching of the operation mode through electromagnetic control, significantly improves the test efficiency and reduces the human operation error.

[0046] As Figure 1As shown, in some embodiments, the atomized product sampling device 10 further includes a flow regulating valve 600 and a No. 2 three-way pipe 700 provided between the three-way solenoid valve 500 and the cascade impactor 300, the No. 2 three-way pipe 700 having a first interface 710, a second interface 720 and a third interface 730 that are interconnected, the first interface 710 being connected to the other end of the cascade impactor 300, the second interface 720 being connected to the outside atmosphere through the flow regulating valve 600, and the third interface 730 being connected to the first end 510 of the three-way solenoid valve 500. This design constructs an adjustable shunt gas path system by adding a flow regulating valve 600 and a No. 2 three-way pipe 700. Since the total flow of the pump is fixed, the main gas path flow is reversely controlled by adjusting the branch gas path flow, so that the inlet flow rate of the cascade impactor 300 can be accurately adjusted. A flow meter can also be connected to the inlet of the cascade impactor 300 to monitor the flow of the main gas line. Combined with the real-time monitoring function of the flow meter, a closed-loop flow control system is formed. This not only realizes the dynamic adjustment of the sampling flow to adapt to the requirements of different particle size classifications, but also avoids the complex structure of the electronic flow controller through mechanical diversion adjustment, thereby significantly reducing the 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 provided between the suction piece 400 and the third end 530 of the three-way solenoid valve 500. This design provides a filter 800 between the suction piece 400 and the three-way solenoid valve 500. The filter 800 may be a HEPA filter (High-Efficiency Particulate Air Filter), which effectively intercepts particulate matter and non-gaseous substances in the gas path, preventing them from entering the vacuum pump and causing pollution or wear, thereby protecting core components and extending their service life. In the air extraction mode when the three-way solenoid valve 500 is powered off, the filter 800 can purify the inhaled ambient air to prevent external particles from interfering with subsequent sampling results; in the power-on sampling mode, it further intercepts tiny particles that may escape from the gas flowing out of the cascade impactor 300 to ensure the cleanliness of the gas path. The filter 800 works in conjunction with the three-way solenoid valve 500 and the flow regulating valve 600 to achieve two-way protection without affecting the dynamic balance of the main and branch air flow. This not only ensures the accuracy of the sampling data but also reduces the need for system maintenance. It is 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 , and the control unit 920 is used to control the opening and closing of the two-way solenoid valve 100 and the opening and closing of the three-way solenoid valve 500 .

[0049] The application also provides an atomized product measuring system, which comprises the atomized product sampling device 10 according to any one of the above embodiments and the atomization device 910.

[0050] The atomized product measuring system described above can achieve at least the following beneficial effects due to the atomized product sampling device 10 described in any one of the above embodiments: when the two-way electromagnetic valve 100 is opened by being powered off, the negative pressure generated by the suction member 400 causes the external air to flow through the entire system to form a stable air flow; when the two-way electromagnetic valve 100 is closed by being powered on, the atomized product sampling device 10 switches to the sampling mode, and the large droplets generated by the atomization device 910 impact and deposit on the inner wall of the No. 1 three-way pipe 200 under the action of inertia, while the fine aerosol particles enter the cascade impactor 300 along with the air flow and are deposited according to particle size. The device adopts a modular design, and the No. 1 three-way pipe 200 and the cascade impactor 300, the two-way electromagnetic valve 100, and the atomization device 910 can be detached, which facilitates the determination of the mass of the large droplets and the aerosol particles of different particle sizes by the weighing method. Specifically, the initial weight of the No. 1 three-way pipe 200 can be measured first, the No. 1 three-way pipe 200 is detached after the collection of the large droplets in the No. 1 three-way pipe 200, and then the final weight of the No. 1 three-way pipe 200 is measured. By comparing the difference between the final weight and the initial weight of the No. 1 three-way pipe 200, the weight of the large droplets collected by the No. 1 three-way pipe 200 can be obtained. Similarly, the initial weights of the collection sheets at different levels can be measured first, the aerosol particles of different particle sizes are deposited on the collection sheets at different levels of the cascade impactor 300, and then the final weights of the collection sheets at different levels are measured. By comparing the difference between the final weight and the initial weight of the collection sheets at different levels, the weights of the aerosol particles of different particle sizes can be obtained. This design realizes full-range sampling of the large droplets and the aerosol particles of different particle sizes, obtains complete mass distribution data, overcomes the measurement error caused by the escape of large droplets in the traditional method, and is particularly suitable for testing scenarios that require comprehensive characterization of the particle size distribution of atomized products.

[0051] In some embodiments, the atomized product measuring system further comprises a weighing device, which can be used to measure the weight of the No. 1 three-way pipe 200 and the weight of the collection sheets of the cascade impactor 300.

[0052] As shown in Figure 5 The application also provides an atomized product testing method, which comprises the atomized product sampling device 10 described above, and the atomized product testing method comprises the following steps:

[0053] S10, starting the suction member 400;

[0054] S30, powering on the two-way electromagnetic valve 100;

[0055] S40, powering off the two-way solenoid valve 100;

[0056] S60. Measure the weight changes of the first tee pipe 200 and the collecting sheets of each stage of the cascade impactor 300, and draw a mass particle size distribution diagram of droplets and aerosol particles of different particle sizes based on the weight changes of the first tee pipe 200 and the collecting sheets of each stage of the cascade impactor 300.

[0057] The above-mentioned atomized product testing method can at least achieve the following beneficial effects: Figure 4 As shown, when the two-way solenoid valve 100 is energized (e.g., for 3 seconds), the two-way solenoid valve 100 is closed, and the first connector 210 of the No. 1 three-way pipe 200 cannot be connected to the outside world through the two-way solenoid valve 100. This can be considered as a sampling mode. The atomization device 910 generates atomized products under the negative pressure of the suction component 400. The atomized products enter through the second connector 220 of the No. 1 three-way pipe 200. The large droplets in the atomized products are deposited on the inner wall of the three-way pipe due to inertia to achieve droplet separation, while the aerosol particles of different particle 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, i.e., the two-way solenoid valve 100 is switched to an open state, allowing outside air to enter the cascade impactor 300 from the first connector 210 through the third connector 230. This allows aerosol particles remaining in the pipeline to fully enter the cascade impactor 300 and deposit on each stage of the collection sheet, fully collecting the atomized product to ensure the accuracy of the measurement results. Finally, the initial weight of the No. 1 tee 200 can be weighed. After the No. 1 tee 200 has collected all the large droplets, the No. 1 tee 200 is removed and the final weight of the No. 1 tee 200 is measured. By comparing the difference between the final weight and the initial weight of the No. 1 tee 200, the weight of the large droplets collected by the No. 1 tee 200 can be obtained. Similarly, the initial weight of each collection sheet can be measured first. After aerosol particles of different sizes are deposited on each collection sheet of the cascade impactor 300, the final weight of each collection sheet can be measured. By comparing the difference between the final and initial weights of each collection sheet, the weight of aerosol particles of different sizes can be obtained. This design enables full sampling of large droplets and aerosol particles of different sizes, obtaining complete mass distribution data. This overcomes the measurement errors caused by large droplet escape in traditional methods and is particularly suitable for testing scenarios requiring comprehensive characterization of the particle size distribution of atomized products.

[0058] like Figure 2 and Figure 5As shown in some embodiments, the step S10 (starting the suction device 400) comprises: starting the suction device 400 and powering off the three-way electromagnetic valve 500. When the three-way electromagnetic valve 500 is powered off, the first end 510 of the three-way electromagnetic valve 500 is closed and the second end 520 is open, so that the suction device 400 can suck the air entering from the second end 520, i.e. the air is sucked without passing through the cascade impactor 300, and the suction device 400 is in a stable working state.

[0059] As shown in some embodiments, Figure 3 , Figure 4 and Figure 5 After the step S10 (starting the suction device 400), the step S20 (powering on the three-way electromagnetic valve 500) is further included in some embodiments. After the suction device 400 reaches a stable working state, the three-way electromagnetic valve 500 is powered on, the first end 510 of the three-way electromagnetic valve 500 is open and the second end 520 is closed, so that the suction device 400 can suck the air flow from the cascade impactor 300. Since the suction device 400 has reached a stable working state, the air flow can stably pass through the cascade impactor 300 system, which is conducive to the stable delivery, accurate collection and measurement of the atomized product.

[0060] As shown in some embodiments, Figure 2 and Figure 5 After the step S40 (powering off the two-way electromagnetic valve 100), the step S50 (powering off the three-way electromagnetic valve 500) is further included in some embodiments. Before the first three-way pipe 200 and the collection pieces of each stage of the cascade impactor 300 are removed for the measurement of the mass of large droplets and aerosol particles of different particle sizes, the three-way electromagnetic valve 500 can be powered off, so that the air flow does not pass through the cascade impactor 300, thereby avoiding the loss of the collected atomized product during the disassembly process, and ensuring the accuracy of the test results.

[0061] As shown in some embodiments, Figure 5As shown, in some embodiments, before the step S60 (measuring the weight change of each stage of the cascade impactor 300 and the weight change of the stage collection piece of the first three-way pipe 200, and drawing a mass particle size distribution diagram of droplets and aerosol particles of different particle sizes according to the weight change of each stage of the cascade impactor 300 and the weight change of the stage collection piece of the first three-way pipe 200), all the preceding steps (such as the steps S10 to S50) are repeatedly executed for a predetermined number of times (such as 10 times). By repeatedly executing the steps (S10 to S50) for multiple cycles, on the one hand, it can ensure that enough large droplets and aerosol particles of each stage particle size are collected for subsequent measurement, and on the other hand, it can avoid accidental errors of single sampling by repeatedly sampling multiple times and taking the average, thereby 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 accurate analysis requirements of low concentration samples. This innovative cyclic sampling design enables the test system to adapt to the detection needs of aerosols of different concentrations, while ensuring the accuracy of the data and greatly improving the applicability and reliability of the method.

[0062] Any combination of the technical features in the above-described embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0063] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

[0064] In the description of the present application, 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0065] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second" can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0066] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0067] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] It should be noted that when an element is referred to as "on", "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes, and do not represent the only implementation.

[0069] In the description of the specification, the description of the terms "one embodiment", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Descriptive descriptions of the above terms in the specification 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 understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

Claims

1. A device for sampling atomized products, characterized in that: include: A two-way solenoid valve, one end of which is connected to the outside atmosphere; A No. 1 three-way pipe, the No. 1 three-way pipe having a first joint, a second joint, and a third joint that are interconnected, the first joint being detachably connected to the other end of the two-way solenoid valve, and the second joint being detachably connected to the atomizing device; a cascade impactor, one end of which is detachably connected to the third joint; as well as a suction member capable of communicating with the other end of the cascade impactor; In which, when the two-way solenoid valve is powered off, the two-way solenoid valve is opened and connected to the outside atmosphere, and the suction piece can generate negative pressure to allow the outside air to pass through the two-way solenoid valve, the first connector, the third connector, and the cascade impactor in sequence; when the two-way solenoid valve is powered on, the two-way solenoid valve is closed and isolated from the outside atmosphere, and the suction piece can generate negative pressure to allow the droplets generated by the atomization device to enter the No. 1 three-way pipe from the second connector and be collected in the No. 1 three-way pipe, and to allow the aerosol particles generated by the atomization device to flow through the second connector and the third connector into the cascade impactor and be deposited on the collection sheet of the cascade impactor.

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

3. The atomized product sampling device according to claim 2, characterized in that: The included angle between the length extension direction of the third joint and the length extension direction of the second joint 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 also includes a three-way solenoid valve arranged between the suction piece and the cascade impactor, the three-way solenoid valve having a first end, a second end and a third end, the first end being connected to the other end of the cascade impactor, the second end being used to communicate with the outside atmosphere, and the third end being connected to the suction piece; when the three-way solenoid valve is powered off, the first end is closed and the second end is opened, so that the suction piece can suck air entering from the second end; when the three-way solenoid valve is powered on, the first end is opened and the second end is closed, so that the suction piece can suck the airflow from the cascade impactor.

5. The atomized product sampling device according to claim 4, characterized in that: The atomized product sampling device also includes a flow regulating valve and a second three-way pipe provided between the three-way solenoid valve and the cascade impactor, wherein the second three-way pipe has a first interface, a second interface, and a third interface that are interconnected, wherein 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; And / or, the atomized product sampling device further comprises a filter provided between the suction member and the third end of the three-way solenoid valve; And / or, the atomized product sampling device further comprises a control unit, the control unit being configured to control the opening and closing of the two-way solenoid valve and the opening and closing of the three-way solenoid valve; And / or, the suction member is a vacuum pump.

6. A system for measuring atomized products, characterized in that: It comprises a weighing device, an atomizing device and an atomized product sampling device as claimed in any one of claims 1 to 5, wherein the weighing device can be used to measure the weight of the No. 1 tee pipe and the weight of the collecting piece of the cascade impactor.

7. A method for testing atomized products, based on the atomized product sampling device according to any one of claims 1 to 5, characterized in that: The atomized product testing method comprises the following steps: activating the suction member; energizing the two-way solenoid valve; Cutting off power to the two-way solenoid valve; The weight changes of the No. 1 tee pipe and the collecting sheets of each stage of the cascade impactor are measured, and the mass particle size distribution diagrams of the droplets and aerosol particles of different particle sizes are drawn according to the weight changes of the No. 1 tee pipe and the collecting sheets of each stage of the cascade impactor.

8. The atomized product testing method according to claim 7, characterized in that: The atomized product sampling device further includes a three-way solenoid valve provided between the suction member and the cascade impactor, the three-way solenoid valve having a first end, a second end, and a third end, the first end being communicated with the other end of the cascade impactor, the second end being used to communicate with the outside atmosphere, and the third end being communicated with the suction member; when the three-way solenoid valve is powered off, the first end is closed and the second end is opened, so that the suction member can suck air entering from the second end; when the three-way solenoid valve is powered on, the first end is opened and the second end is closed, so that the suction member can suck airflow from the cascade impactor; After starting the suction member, the method further includes the following step: energizing the three-way solenoid valve.

9. The atomized product testing method according to claim 8, characterized in that: The starting of the suction member includes: starting the suction member and de-energizing the three-way solenoid valve; And / or, after the step of turning off the power to the two-way solenoid valve, the method further includes the following step: turning off the power to the three-way solenoid valve.

10. The atomized product testing method according to claim 9, characterized in that: Before measuring the weight changes of the No. 1 tee and the collecting plates of each stage of the cascade impactor, and drawing the mass particle size distribution diagram of droplets and aerosol particles of different particle sizes based on the weight changes of the No. 1 tee and the collecting plates of each stage of the cascade impactor, all the pre-steps are repeated a predetermined number of times.

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