Cigarette sidestream smoke particulate matter puff-by-puff trapping device and method

Abstract

The invention relates to the technical field of cigarette manufacturing, and discloses a sidestream smoke particulate matter trapping unit and method. The device comprises a sidestream flue gas particulate matter trapping unit which comprises a fishtail cover, a sidestream flue gas filter disc trap used for trapping particulate matter of sidestream flue gas and a sampling pump used for providing power for suction of the sidestream flue gas, which are sequentially connected in series; the main stream smoke particulate matter capturing unit comprises a cigarette holder and a suction power source, the cigarette holder and the suction power source are sequentially connected in series, the cigarette holder is used for fixing cigarettes, and the suction power source is used for generating suction power for the cigarette holder. According to the technical scheme, a trapping mechanism of puff-by-puff correspondence is established, it is ensured that sidestream smoke released within the specific time period can be instantly and independently collected while each puff simulates suction, and therefore the technical problem that in the prior art, only whole-process collection can be conducted, and different numbers of suction puffs cannot be distinguished is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cigarette manufacturing, in particular to a device and method for capturing side-stream smoke particulate matter of cigarettes by puff. BACKGROUND

[0002] Side-stream smoke is a complex multi-phase aerosol that permeates from parts other than filters during the burning of a cigarette, containing gas, liquid and solid phases, mainly generated by evaporation pyrolysis, polymerization and other reactions. Its particulate matter contains water, nicotine and tar, and the content of these substances is the main indicator for evaluating the safety of cigarettes. Compared with mainstream smoke, the concentration of harmful substances in side-stream smoke particulate matter is relatively higher. With the increasing attention to passive smoking in recent years, the release and harm of cigarette side-stream smoke have become the focus of public and industry attention. Therefore, studying the distribution rule of chemical components in side-stream smoke particulate matter is of great significance for exploring environmental tobacco smoke.

[0003] The release of side-stream smoke is a dynamic process, and only by analyzing the composition of side-stream smoke particulate matter by puff can the distribution rule be clear. Therefore, how to effectively capture side-stream smoke particulate matter by puff has become a difficulty in today's tobacco science and technology work. Some researchers make the test cigarette smoke in a completely sealed cavity, collect and discharge the side-stream smoke while making the components adhere to the filter and the flow cover, so as to realize the complete collection of side-stream smoke in the whole smoking process, and then accurately determine the composition of side-stream smoke particulate matter.

[0004] Although the above method significantly improves the detection accuracy of the composition of side-stream smoke particulate matter, it still cannot realize puff-by-puff detection, resulting in unclear variation rule of side-stream smoke particulate matter. Therefore, it is necessary to develop and design a high-efficiency and continuous puff-by-puff side-stream smoke particulate matter capture device to provide a scientific basis for further clarifying the dynamic variation rule of side-stream smoke particulate matter and objectively evaluating the impact of passive smoking on human health. SUMMARY

[0005] In view of the above deficiencies or shortcomings in the prior art, the present application aims to provide a device and method for capturing side-stream smoke particulate matter of cigarettes by puff, so as to solve the technical problem that the prior art cannot capture and analyze side-stream smoke particulate matter of cigarettes by puff, thereby leading to unclear dynamic release rule.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a device for capturing side-stream smoke particulate matter of cigarettes by puff, comprising:

[0007] The side-stream smoke particulate matter capture unit comprises a fish tail cover for guiding and capturing part of the particulate matter in the side-stream smoke, a side-stream smoke filter trap for capturing the particulate matter in the side-stream smoke, and a sampling pump for providing power for the suction of the side-stream smoke, which are connected in series.

[0008] The mainstream smoke particulate matter collection unit includes a cigarette holder for fixing cigarettes and a suction power source for generating suction power for the cigarette holder, which are connected in series.

[0009] The sampling pump is configured to operate synchronously with the suction power source to capture the particulate matter in the side-flow flue gas generated during the sequential suction process.

[0010] The device of the present invention establishes a “port-by-port” collection mechanism by configuring the side-flow flue gas sampling pump and the mainstream flue gas suction power source to operate synchronously. This ensures that the side-flow flue gas released during each simulated suction occurs instantly and independently, thereby overcoming the technical problem of existing technologies that can only collect the entire process and cannot distinguish between different suction ports.

[0011] Furthermore, by clearly dividing the sidestream and mainstream collection units, the device separates the smoke path, avoiding cross-interference. Its simple structure and high integration ensure ease of operation and reliability of experimental results. Simultaneously, by simulating real-world smoking behavior, the device ensures that the combustion state of cigarettes during testing is highly consistent with actual smoking, thereby guaranteeing that the collected sidestream smoke samples and their analytical data accurately reflect the actual situation and significantly improving data accuracy.

[0012] In some embodiments, the side-flow flue gas particulate matter collection unit further includes a filter and a flow regulating valve;

[0013] The filter is connected in the air path between the side-flow flue gas filter collector and the sampling pump, and is used to filter out dust and mist in the flue gas.

[0014] The flow regulating valve is connected in the gas path between the filter and the sampling pump, and is used to precisely regulate the flow rate of the flue gas passing through the side-flow flue gas particulate matter collection unit.

[0015] In some embodiments, the sidestream flue gas particulate matter collection unit further includes an absorption bottle; the absorption bottle is connected in series in the gas path between the sidestream flue gas filter collector and the filter, and is used to fill the absorption liquid to collect and analyze the gas phase components in the sidestream flue gas.

[0016] In some embodiments, the mainstream smoke particulate matter collection unit further includes a three-way valve connected in series between the cigarette holder and the suction power source; the three ports of the three-way valve are respectively connected to the suction power source, the cigarette holder, and the atmospheric passage or exhaust system; the three-way valve is configured to establish an air passage connection between the suction power source and the cigarette holder when the suction power source performs a suction action, and to establish an air passage connection between the suction power source and the atmospheric passage or exhaust system when the exhaust action is performed.

[0017] or,

[0018] The mainstream smoke particulate matter collection unit further includes a mainstream smoke filter collector and a three-way valve connected in series between the cigarette holder and the suction power source; the mainstream smoke filter collector is used to collect particulate matter in the mainstream smoke; the three ports of the three-way valve are respectively connected to the suction power source, the outlet of the mainstream smoke filter collector, and the atmospheric passage or exhaust system; the three-way valve is configured to establish an air passage connection between the suction power source and the mainstream smoke filter collector and the cigarette holder when the suction power source performs a suction action, and to establish an air passage connection between the suction power source and the atmospheric passage or exhaust system when the exhaust action is performed.

[0019] In some embodiments, the suction power source includes a drive motor, a piston driven by the drive motor, and a cylinder housing the piston; the drive motor is electrically connected to a controller configured to control the drive motor to cause the piston to move within the cylinder according to a predetermined suction program.

[0020] In some embodiments, the fishtail cover is arranged vertically, with a wide air inlet at the bottom for collecting smoke and a narrow air outlet at the top for connecting to a subsequent air path; the side wall of the fishtail cover is provided with an opening near the air inlet for cigarettes to be inserted, so that cigarettes fixed by the cigarette holder can be inserted into the internal cavity of the fishtail cover through the opening.

[0021] A second aspect of the present invention provides a method for collecting particulate matter in cigarette sidestream smoke puff by puff, comprising the following steps:

[0022] Step S1: Divide the cigarette samples to be tested into m batches, where the kth batch contains n cigarettes, k = 1, 2, ..., m;

[0023] Step S2: Perform a smoking experiment on the kth batch of cigarettes, control the total number of smoking ports to k using the smoking power source, and simultaneously start the sampling pump to capture the side-flow smoke.

[0024] Step S3: After the smoking experiment, determine the total mass difference between the fishtail cover and the side-flow smoke filter collector before and after the smoking experiment, and obtain the total particulate matter mass M collected by the kth batch of cigarettes in k puffs. k ;

[0025] Step S4, repeat steps S2 and S3 until all m batches of tests are completed;

[0026] Step S5: Based on the total particulate matter mass of each batch, the average particulate matter mass of the side-stream smoke of the cigarette sample is obtained by calculating the mass difference between adjacent batches; wherein, the average particulate matter release amount of the i-th batch = (M i -M i-1}) / n, where i = 2, 3, ..., m, and M0 = 0.

[0027] This invention employs a core strategy combining "group incremental smoking" and "mathematical difference calculation" to transform the single-puff sideflow smoke release, which is difficult to directly separate and weigh physically, into a scientific problem involving the cumulative measurement of multiple batches of samples and mathematical analysis. This allows for a reliable and easily implemented method for accurately calculating the "puff-by-puff" quality. By setting each batch to include multiple cigarette samples and averaging the results, this method effectively smooths out random errors caused by individual differences in individual cigarettes, resulting in more statistically representative and reliable puff-by-puff release data. Ultimately, this method clearly demonstrates for the first time the complete dynamic release pattern of sideflow smoke particulate matter from the first puff to the last, providing crucial scientific evidence for a deeper understanding of its generation mechanism, objective evaluation of cigarette products, and guidance for the development of low-harm products.

[0028] In some embodiments, in step S2, after the last suction is completed, the sampling pump continues to run for a set time to completely collect the side-flow flue gas remaining after the last suction.

[0029] In some embodiments, a calibration step is included before step S1, the calibration step including:

[0030] The suction capacity of the suction power source is calibrated, and the suction flow rate of the side-flow flue gas is adjusted to a predetermined value through the flow regulating valve.

[0031] The present invention also provides a method for collecting particulate matter in cigarette sidestream smoke one-way from one end, comprising the following steps:

[0032] Step S1: Divide the cigarette samples to be tested into m batches, where the kth batch contains n cigarettes, k = 1, 2, ..., m;

[0033] Step S2: Perform a smoking experiment on the kth batch of cigarettes, control the total number of smoking ports to k using the smoking power source, and simultaneously start the sampling pump to capture the side-flow smoke.

[0034] Step S3: After the smoking experiment, determine the total mass difference between the fishtail cover and the side-flow smoke filter collector before and after the smoking experiment, and obtain the total particulate matter mass M collected by the kth batch of cigarettes in k puffs. k ;

[0035] Step S4, repeat steps S2 and S3 until all m batches of tests are completed;

[0036] Step S5: Based on the total particulate matter mass of each batch, the average particulate matter mass of the side-stream smoke of the cigarette sample is obtained by calculating the mass difference between adjacent batches; wherein, the average particulate matter release amount of the i-th batch = (M i -M i-1 ) / n, where i = 2, 3, ..., m, and M0 = 0;

[0037] In the suction experiment of step S2, the three-way valve is controlled to operate in the following mode:

[0038] When the suction power source performs the suction action, the three-way valve switches to the air path connecting the suction power source and the cigarette holder;

[0039] When the suction power source performs a retraction or reset action, the three-way valve switches to disconnect the air passage of the suction power source and the cigarette holder and connect the air passage of the suction power source to the atmospheric passage or the exhaust system.

[0040] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of one embodiment of the cigarette sideflow smoke particulate matter collection device of the present invention;

[0042] Figure 2 This is a schematic diagram of one embodiment of the cigarette sideflow particulate matter collection method of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] 1. Suction syringe; 2. Three-way valve; 3. Mainstream smoke filter trap; 4. Cigarette holder; 5. Ashtray; 6. Fishtail cover; 7. Sidestream smoke filter trap; 8. Absorption bottle; 9. Filter; 10. Flow regulating valve; 11. Sampling pump. Detailed Implementation

[0045] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0046] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] The first aspect of the present invention provides a cigarette sidestream particulate matter collection device, comprising a sidestream particulate matter collection unit and a mainstream particulate matter collection unit.

[0049] The side-flow flue gas particulate matter collection unit includes a fishtail hood 6 for guiding and collecting particulate matter in the side-flow flue gas, a side-flow flue gas filter collector 7 for collecting particulate matter in the side-flow flue gas, and a sampling pump 11 for providing power for the suction of the side-flow flue gas, connected in series.

[0050] The mainstream smoke particulate matter collection unit includes a cigarette holder 4 for fixing cigarettes and a suction power source 1 for generating suction power for the cigarette holder 4, connected in series. A filter can be installed inside the mainstream smoke filter collector 3. In one optional embodiment, a 44mm Cambridge filter is used to collect particulate matter in the mainstream smoke.

[0051] The sampling pump 11 is configured to operate synchronously with the suction power source 1 to capture the particulate matter in the side-flow flue gas generated during the sequential suction process.

[0052] The labyrinth ring and neoprene gasket that can be installed inside the cigarette holder 4 wrap around the cigarette butt area to provide a sealing and fixing effect.

[0053] In some embodiments, the suction power source 1 includes a drive motor, a piston driven by the drive motor, and a cylinder housing the piston; the drive motor is electrically connected to a controller configured to control the drive motor so that the piston moves within the cylinder according to a predetermined suction program.

[0054] Furthermore, the suction power source 1 can be a suction syringe. The suction syringe has a piston structure, with a stepper motor driving the piston to move within a circular glass tube, thereby simulating human inhalation of a cigarette. The suction syringe also includes a controller to control the movement mode of the stepper motor. Those skilled in the art can easily understand that changing the controller parameters can alter the suction mode, such as suction duration, suction cycle, suction curve, and perform volume calibration, etc., which will not be elaborated further here.

[0055] In one optional embodiment, the fishtail cover 6 is arranged vertically, with a wide air inlet at the bottom for collecting smoke and a narrow air outlet at the top for connecting to subsequent air passages. The side wall of the fishtail cover 6, near the air inlet, has an opening for cigarettes to enter, allowing cigarettes held by the cigarette holder 4 to extend into the internal cavity of the fishtail cover 6 through the opening. The material and dimensions of the fishtail cover 6 are manufactured according to the relevant provisions in standard YC / T 185-2004.

[0056] Furthermore, an ashtray 5 can be installed below the air inlet of the fishtail cover 6 to collect the ash that falls during cigarette burning. Its area and shape should cover as much of the area where ash may fall as possible.

[0057] The sampling pump 11 provides the suction power for the side-flow flue gas and can optionally use an adjustable diaphragm air pump. The sampling pump 11 also includes a pump controller and a real-time flow indicator. The pump controller is used to control the suction flow rate of the air pump. In this embodiment, the adjustable suction flow rate range is 0 to 6 L / min, and the real-time flow indicator monitors the actual flow rate of the side-flow flue gas in the air pipe.

[0058] As described above, by setting the diaphragm pump's suction flow rate to a value slightly higher than the predetermined suction flow rate through the pump controller, and then fine-tuning it through the real-time flow indicator and the multi-turn metering needle valve, the side-flow flue gas sampling flow rate can be adjusted to a fairly precise value.

[0059] In some embodiments, the side-flow flue gas particulate matter collection unit further includes a filter 9 and a flow regulating valve 10. The filter 9 is connected in the gas path between the side-flow flue gas filter collector 7 and the sampling pump 11. The flow regulating valve 10 is connected in the gas path between the filter 9 and the sampling pump 11.

[0060] The purpose of filter 9 is to purify the side-flow flue gas to protect downstream precision components. Although most of the particulate matter in the side-flow flue gas is effectively intercepted by the side-flow flue gas filter trap 7, extremely small particles and liquid aerosols may still penetrate or bypass the filter. If these substances are allowed to directly enter the subsequent gas path, they may contaminate, clog, or even damage the precision valve passage of the downstream flow control valve 10 and the internal gas chamber and diaphragm of the sampling pump 11, affecting their normal operating performance and service life. In addition, if gas phase composition analysis equipment such as gas bags or analyzers are connected downstream, these residual particulate matter will cause cross-contamination and interfere with the accuracy of the analysis results.

[0061] Therefore, setting up filter 9 is equivalent to adding a safety barrier, thereby ensuring the long-term stable operation of flow regulating valve 10 and sampling pump 11, and maintaining the integrity and reliability of the data of the entire device.

[0062] In one embodiment of the present invention, the filter 9 is a micro-mist filter with a filtration capacity of 0.01 μm.

[0063] The purpose of the flow control valve 10 is to achieve precise and stable control of the sampling flow rate of the side-stream flue gas. In analytical chemistry, any sampling and measurement must be performed under known, constant, and repeatable conditions. For the capture of side-stream flue gas, the sampling flow rate is a crucial parameter. The sampling pump 11 itself can provide suction power and allow for approximate flow rate setting, but its output flow rate may fluctuate due to factors such as load and voltage, and fine-tuning is difficult. This is precisely the function of the flow control valve 10. Based on the flow indicator of the sampling pump 11, the operator can precisely set and stabilize the sampling flow rate of the side-stream flue gas at a specific value required by standard methods, such as 3.0 L / min, by finely adjusting this valve. If the sampling flow rate fluctuates, even if the same mass of particulate matter is captured, the flue gas concentration it represents will be different, which will lead to the incomparability of experimental data between different batches or even different numbers of samples.

[0064] Therefore, setting the flow regulating valve 10 is an indispensable part of achieving accurate quantitative analysis. It ensures that the side-flow smoke from each suction experiment and each batch of cigarette samples is captured under the same flow rate conditions, thereby guaranteeing the accuracy, repeatability, and scientific validity of the final calculated "puff-by-puff" particulate matter mass data.

[0065] In one embodiment of the present invention, a multi-turn metering needle valve is used.

[0066] The side-flow flue gas particulate matter collection unit also includes an absorption bottle 8. The absorption bottle 8 is connected in series in the gas path between the side-flow flue gas filter collector 7 and the filter 9. The material and dimensions of the absorption bottle 8 are manufactured according to the relevant provisions in standard YC / T185-2004. The absorption bottle 8 can be filled with different solutions to analyze gaseous substances such as ammonia and nitrogen oxides.

[0067] In one optional embodiment, the mainstream smoke particulate matter collection unit further includes a three-way valve 2 connected in series between the cigarette holder 4 and the suction power source 1. The three ports of the three-way valve 2 are respectively connected to the suction power source 1, the cigarette holder 4, and the atmospheric passage or exhaust system. The three-way valve 2 is configured to, when the suction power source 1 performs a suction action, establish an air passage connection between the suction power source 1 and the cigarette holder 4, and disconnect the air passage connection between the suction power source 1 and the atmospheric passage or exhaust system; when performing an exhaust action, disconnect the air passage connection between the suction power source 1 and the cigarette holder 4, and establish an air passage connection between the suction power source 1 and the atmospheric passage or exhaust system.

[0068] In another optional embodiment, the mainstream smoke particulate matter collection unit further includes a mainstream smoke filter collector 3 and a three-way valve 2 connected in series between the cigarette holder 4 and the suction power source 1. The mainstream smoke filter collector 3 is used to collect particulate matter in the mainstream smoke. The three ports of the three-way valve 2 are respectively connected to the suction power source 1, the outlet of the mainstream smoke filter collector 3, and the atmospheric passage or exhaust system. The three-way valve 2 is configured to, when the suction power source 1 performs a suction action, cut off the air passage between the suction power source 1 and the atmospheric passage or exhaust system, and establish the air passage between the suction power source 1 and the mainstream smoke filter collector 3 and the cigarette holder 4; when performing an exhaust action, cut off the air passage between the suction power source 1 and the mainstream smoke filter collector 3 and the cigarette holder 4, and establish the air passage between the suction power source 1 and the atmospheric passage or exhaust system.

[0069] In the two specific embodiments described above, a simplified and stable mainstream smoke environment simulation system was constructed based on the setting of the three-way valve 2. During the inhalation action, a closed inhalation airway is formed to simulate real human smoking behavior. During the exhaust and pushing action, the system switches to an atmospheric passage, directly venting the gas generated during the piston retraction process. This effectively prevents any possible reverse airflow from interfering with the burning cigarette and the settling sideflow smoke. Although this design does not capture particulate matter in the mainstream smoke, it ensures that the combustion state of the cigarette throughout the inhalation experiment is as close to reality as possible, providing the most basic and crucial environmental guarantee for the stable and reliable generation of sideflow smoke. This scheme is suitable for applications that study the release law of sideflow smoke itself without simultaneously analyzing the composition of mainstream smoke.

[0070] The three-way valve 2 can be an electromagnetic three-way pilot valve controlled by the controller of the suction syringe 1.

[0071] The device of the present invention establishes a “port-by-port” collection mechanism by configuring the side-flow flue gas sampling pump 11 and the mainstream flue gas suction power source 1 to operate synchronously. This ensures that the side-flow flue gas released during each simulated suction occurs instantly and independently, thereby overcoming the technical problem of existing technologies that can only collect the entire process and cannot distinguish between different suction ports.

[0072] Furthermore, by clearly dividing the sidestream and mainstream collection units, the device separates the smoke path, avoiding cross-interference. Its simple structure and high integration ensure ease of operation and reliability of experimental results. Simultaneously, by simulating real-world smoking behavior, the device ensures that the combustion state of cigarettes during testing is highly consistent with actual smoking, thereby guaranteeing that the collected sidestream smoke samples and their analytical data accurately reflect the actual situation and significantly improving data accuracy.

[0073] A second aspect of the present invention provides a method for collecting particulate matter in cigarette sidestream smoke one-way from one end, such as... Figure 2 The method includes the following steps:

[0074] Step S1: Calibrate the suction capacity, suction duration, and suction interval of the suction syringe, and adjust the side-flow flue gas sampling flow rate;

[0075] Step S2: Screen and prepare cigarette samples, dividing them into m batches, batch numbers 1 to m, with n cigarettes in each batch.

[0076] Step S3: Set the smoking parameters so that the number of puffs for each batch of cigarettes is consistent with its corresponding batch number;

[0077] That is, the cigarette samples to be tested are divided into m batches, where the kth batch contains n cigarettes, k = 1, 2, ..., m;

[0078] Step S4: Take the clean fishtail cover 3 and the side-flow flue gas filter trap 7, weigh and record their initial mass, and install them;

[0079] Step S5: Light the cigarette and simultaneously start the suction syringe and sampling pump 11 for testing. Once the set number of suction puffs is reached, immediately remove the cigarette butt.

[0080] That is, a smoking experiment is performed on the kth batch of cigarettes, and the total number of smoking ports is controlled to k ports by the smoking power source (1), while the sampling pump (11) is started to capture the side-flow smoke.

[0081] Step S6: After each batch of cigarettes is smoked, remove the fishtail cover 3 and the side-flow smoke filter trap 7, weigh them, and record the change in their mass.

[0082] Step S7: If all cigarette samples have been tested, proceed to step 4; otherwise, proceed to step 8.

[0083] Step S8: Add the changes in mass of the fishtail cover 3 and the side-flow smoke filter trap 7 used when smoking each batch of cigarettes to obtain the mass of particulate matter. Subtract the mass of particulate matter from the mass of two adjacent batches and divide by the number of cigarettes in each batch n to obtain the mass of particulate matter per puff of the side-flow smoke of the cigarette sample.

[0084] That is, after the smoking experiment, the total mass difference between the fishtail cover (6) and the side-flow smoke filter trap (7) before and after the smoking experiment is determined, and the total particulate matter mass M collected by the kth batch of cigarettes in the kth puff is obtained. k Based on the total particulate matter mass of each batch, the average particulate matter mass of the side-stream smoke of the cigarette sample is obtained by calculating the mass difference between adjacent batches; where, the average particulate matter release amount of the i-th batch = (M i -M i-1}) / n, where i = 2, 3, ..., m, and M0 = 0.

[0085] Furthermore, after the last puff of each batch of cigarettes is finished, the sampling pump (11) continues to run for a set time to completely collect the side-flow smoke remaining after that puff.

[0086] In some embodiments, when a three-way valve 2 is connected in series between the cigarette holder 4 and the suction power source 1, or when the mainstream smoke filter collector 3 and the three-way valve 2 are connected in series, the three-way valve 2 is controlled to operate in the following mode:

[0087] When the suction power source 1 performs the suction action, the three-way valve 2 switches to the air passage connecting the suction power source 1 and the cigarette holder 4;

[0088] When the suction power source 1 performs a retraction or reset action, the three-way valve 2 switches to disconnect the air passage of the suction power source 1 and the cigarette holder 4 and connect the suction power source 1 with the air passage of the atmosphere or the exhaust system.

[0089] The following detailed explanation is based on the analysis of carbon monoxide content in the sidestream smoke of n cigarettes in the kth batch of this embodiment.

[0090] Set the suction capacity, suction duration, and suction interval according to the standard, adjust the side flow flue gas suction flow rate to 3L / min, and set the number of suction ports to k ports.

[0091] Weigh the initial mass M0 of the fishtail cover 3 and the initial mass M1 of the side-flow flue gas filter trap 7;

[0092] Install the fishtail cover 3 and the side-flow smoke filter collector 7, light the cigarette and start the suction syringe to draw in the smoke, and at the same time start the sampling pump 11 to collect the particulate matter in the side-flow smoke.

[0093] After the k-th suction interval is reached, continue to capture the sideflow flue gas for 30 seconds to completely collect the sideflow flue gas and ensure accurate results.

[0094] Remove the fishtail cover 3 and the side-flow smoke filter trap 7 and weigh them. Their masses are M0' and M1', respectively. Therefore, the mass of particulate matter in the side-flow smoke trapped by k puffs of this batch of cigarettes is M. k = (M1'-M1)+(M0'-M0), similarly, the mass of particulate matter captured in the sidestream smoke of batches (k-1) and (k+1) cigarettes during (k-1) puffs and (k+1) puffs are respectively M k-1 and M k+1 Then the mass of particulate matter in the side-flow smoke of the kth puff of the cigarette sample can be calculated as (M). k -M k-1 The mass of particulate matter in the (k+1)th inlet side-flow flue gas is (M) / n. k+1 -M k ) / n.

[0095] Based on the three-way valve 2, a simplified and stable mainstream smoke environment simulation system was constructed. During the inhalation action, a closed inhalation airflow path is formed to simulate real human smoking behavior. During the exhaust and pushing action, the system switches to an atmospheric passage, directly venting the gas generated during piston retraction. This effectively prevents any possible reverse airflow from interfering with the burning cigarette and the settling sideflow smoke. Although this design does not capture particulate matter in the mainstream smoke, it ensures that the combustion state of the cigarette throughout the inhalation experiment is as close to reality as possible, providing the most basic and crucial environmental guarantee for the stable and reliable generation of sideflow smoke. This scheme is suitable for applications that study the release patterns of sideflow smoke itself, without requiring simultaneous analysis of the mainstream smoke composition.

[0096] This invention employs a core strategy combining "group incremental smoking" and "mathematical difference calculation" to transform the single-puff sideflow smoke release, which is difficult to directly separate and weigh physically, into a scientific problem involving the cumulative measurement of multiple batches of samples and mathematical analysis. This allows for a reliable and easily implemented method for accurately calculating the "puff-by-puff" quality. By setting each batch to include multiple cigarette samples and averaging the results, this method effectively smooths out random errors caused by individual differences in individual cigarettes, resulting in more statistically representative and reliable puff-by-puff release data. Ultimately, this method clearly demonstrates for the first time the complete dynamic release pattern of sideflow smoke particulate matter from the first puff to the last, providing crucial scientific evidence for a deeper understanding of its generation mechanism, objective evaluation of cigarette products, and guidance for the development of low-harm products.

[0097] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0098] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0099] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A device for collecting particulate matter from cigarette sidestream smoke, characterized in that, include: The side-flow flue gas particulate matter collection unit includes a fishtail hood (6) for guiding and collecting particulate matter in the side-flow flue gas, a side-flow flue gas filter collector (7) for collecting particulate matter in the side-flow flue gas, and a sampling pump (11) for providing power for the suction of the side-flow flue gas, connected in series. The mainstream smoke particulate matter collection unit includes a cigarette holder (4) for fixing cigarettes and a suction power source (1) for generating suction power for the cigarette holder (4) connected in series. The sampling pump (11) is configured to operate synchronously with the suction power source (1) to capture the particulate matter in the side-flow flue gas generated during the sequential suction process.

2. The cigarette sideflow particulate matter collection device according to claim 1, characterized in that, The side-flow flue gas particulate matter collection unit also includes a filter (9) and a flow regulating valve (10); The filter (9) is connected in the air path between the side-flow flue gas filter trap (7) and the sampling pump (11) to filter out dust and mist in the flue gas; The flow regulating valve (10) is connected in the gas path between the filter (9) and the sampling pump (11) to precisely regulate the flow rate of the flue gas passing through the side-flow flue gas particulate matter collection unit.

3. The cigarette sideflow particulate matter collection device according to claim 2, characterized in that, The side-flow flue gas particulate matter collection unit also includes an absorption bottle (8); the absorption bottle (8) is connected in series in the gas path between the side-flow flue gas filter collector (7) and the filter (9), and is used to fill the absorption liquid to collect and analyze the gas phase components in the side-flow flue gas.

4. The cigarette sideflow particulate matter collection device according to claim 1, characterized in that: The mainstream smoke particulate matter collection unit also includes a three-way valve (2) connected in series between the cigarette holder (4) and the suction power source (1); the three ports of the three-way valve (2) are respectively connected to the suction power source (1), the cigarette holder (4) and the atmospheric passage or exhaust system. or, The mainstream smoke particulate matter collection unit also includes a mainstream smoke filter collector (3) and a three-way valve (2) connected in series between the cigarette holder (4) and the suction power source (1); the mainstream smoke filter collector (3) is used to collect particulate matter in the mainstream smoke; the three ports of the three-way valve (2) are respectively connected to the suction power source (1), the outlet of the mainstream smoke filter collector (3), and the atmospheric passage or exhaust system; the three-way valve (2) is configured to establish an air passage connection between the suction power source (1) and the mainstream smoke filter collector (3) and the cigarette holder (4) when the suction power source (1) performs a suction action, and to establish an air passage connection between the suction power source (1) and the atmospheric passage or exhaust system when the exhaust action is performed.

5. The cigarette sideflow particulate matter collection device according to claim 1, characterized in that, The suction power source (1) includes a drive motor, a piston driven by the drive motor, and a cylinder housing the piston; the drive motor is electrically connected to a controller configured to control the drive motor so that the piston moves in the cylinder according to a predetermined suction program.

6. The cigarette sideflow particulate matter collection device according to claim 1, characterized in that, The fishtail cover (6) is arranged vertically, with a wide air inlet at the bottom for collecting smoke and a narrow air outlet at the top for connecting to the subsequent air path; the side wall of the fishtail cover (6) near the air inlet has an opening for cigarettes to be inserted, so that cigarettes fixed by the cigarette holder (4) can be inserted into the internal cavity of the fishtail cover (6) through the opening.

7. A method for collecting particulate matter in cigarette sidestream smoke one-way from one inlet, characterized in that, This method uses the cigarette sidestream particulate matter collection device according to any one of claims 1-6, and includes the following steps: Step S10: Divide the cigarette samples to be tested into m batches, where the kth batch contains n cigarettes, k = 1, 2, ..., m; Step S20: Perform a smoking experiment on the kth batch of cigarettes. Control the total number of smoking ports to k ports through the smoking power source (1), and simultaneously start the sampling pump (11) to capture the side-flow smoke. Step S30: After the smoking experiment, determine the total mass difference between the fishtail cover (6) and the side-flow smoke filter trap (7) before and after the smoking experiment, and obtain the total particulate matter mass M collected by the kth batch of cigarettes in k puffs. k ; Step S40, repeat steps S20 and S30 until all m batches have been tested; Step S50: Based on the total particulate matter mass of each batch, the average particulate matter mass of the side-stream smoke of the cigarette sample is obtained by calculating the mass difference between adjacent batches; wherein, the average particulate matter release amount of the i-th batch = (M i -M i-1 }) / n, where i = 2, 3, ..., m, and M0 = 0.

8. The method for collecting particulate matter in cigarette sidestream smoke according to claim 7, characterized in that, In step S20, after the last suction is completed, the sampling pump (11) continues to run for a set time to completely collect the side-flow flue gas remaining after the last suction.

9. The method for collecting particulate matter in cigarette sidestream smoke according to claim 7, characterized in that, A calibration step is included before step S10, the calibration step including: The suction capacity of the suction power source (1) is calibrated, and the suction flow rate of the side-flow flue gas is adjusted to a predetermined value through the flow regulating valve (10).

10. A method for collecting particulate matter in cigarette sidestream smoke one-way from one inlet, characterized in that, This method uses the cigarette sidestream particulate matter collection device of claim 4, and includes the following steps: Step S10: Divide the cigarette samples to be tested into m batches, where the kth batch contains n cigarettes, k = 1, 2, ..., m; Step S20: Perform a smoking experiment on the kth batch of cigarettes. Control the total number of smoking ports to k ports through the smoking power source (1), and simultaneously start the sampling pump (11) to capture the side-flow smoke. Step S30: After the smoking experiment, determine the total mass difference between the fishtail cover (6) and the side-flow smoke filter trap (7) before and after the smoking experiment, and obtain the total particulate matter mass M collected by the kth batch of cigarettes in k puffs. k ; Step S40, repeat steps S2 and S3 until all m batches of tests are completed; Step S50: Based on the total particulate matter mass of each batch, the average particulate matter mass of the side-stream smoke of the cigarette sample is obtained by calculating the mass difference between adjacent batches; wherein, the average particulate matter release amount of the i-th batch = (M i -M i-1 }) / n, where i = 2, 3, ..., m, and M0 = 0; In the suction experiment of step S20, the three-way valve (2) is controlled to operate in the following mode: When the suction power source (1) performs the suction action, the three-way valve (2) switches to the air path connecting the suction power source (1) and the cigarette holder (4); When the suction power source (1) performs a retraction or reset action, the three-way valve (2) switches to disconnect the air passage of the suction power source (1) and the cigarette holder (4) and connect the air passage of the suction power source (1) with the atmospheric passage or the exhaust system.

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