Portable smoke suction and detection system, method and application

Abstract

The invention discloses a portable smoke suction and detection system and method and application, and relates to the technical field of tobacco detection equipment. By arranging the mixing cavity and the diluting unit, the concentration of the flue gas can be diluted to be within a measuring range suitable for detection, and the detection precision is guaranteed; the flue gas detection unit is arranged, flue gas passes through the gas detection area, particulate matter in the flue gas is separated firstly, then the flue gas enters the gas sensor to be detected, the content of substances in gas components is analyzed, part of the flue gas is shunted from the detection main switch to the particulate matter detection area and detected in the particulate matter sensor, and the content of the particulate matter in the flue gas is measured. By means of the method, online rapid detection of smoke parameters (gas parameters and particle parameters) of the tobacco products can be achieved, meanwhile, all the structures are simple, the size is small, the smoke parameters can be integrated in the box body, and good portability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco detection equipment, and in particular, to a portable flue gas suction and detection system, method and application. Background Art

[0002] Existing tobacco products mainly include traditional cigarettes, heat-not-burn tobacco, e-cigarettes and smokeless tobacco products such as oral tobacco. In theory, through modern instrumental analysis means, a comprehensive analysis of the mainstream flue gas components in tobacco products can be achieved. For example, traditional smoking machines CETI 8 and the e-cigarette smoking machine of EDS1, by using Cambridge filter pads and solvent traps as the main flue gas trapping measures, and then performing a series of chemical extractions and separation analyses, this conventional off-line method cannot reflect the composition of fresh flue gas products, and the experimental steps are cumbersome, with poor reproducibility and stability. Smoking machines LM4E and VC 1 do not have the function of detecting flue gas-related parameters and do not have a portable design. In addition, existing smoking machines are difficult to achieve on-line simultaneous detection of the particulate matter concentration and flue gas components in flue gas.

[0003] In view of this, the present invention is specifically proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable flue gas suction and detection system, method and application.

[0005] The present invention is implemented as follows:

[0006] In a first aspect, the present invention provides a portable flue gas suction and detection system, including a box body, a cigarette holder, a mixing unit, a dilution gas path unit, a flue gas detection unit and a gas suction unit.

[0007] The cigarette holder is installed on the box body, and the mixing unit, the dilution gas path unit, the flue gas detection unit and the gas suction unit are all arranged inside the box body.

[0008] The mixing unit includes a mixing chamber, and the cigarette holder is communicated with the mixing chamber so that flue gas enters the mixing chamber.

[0009] The dilution gas path unit includes a dilution gas pump and a dilution solenoid valve. The dilution gas pump is communicated with external air, and the dilution gas pump, the dilution solenoid valve and the mixing chamber are connected in sequence to provide dilution gas to the mixing chamber.

[0010] The flue gas detection unit includes a flue gas detection main valve, a gas detection area, and a particulate matter detection area. Both the gas detection area and the particulate matter detection area are connected to the flue gas detection main valve, and the flue gas detection main valve is connected to the mixing chamber to control the entry of flue gas into the gas detection area and / or the particulate matter detection area. The gas detection area includes a first air filtration module, a gas detection solenoid valve, a gas sensor, and a gas detection air pump connected in sequence. The first air filtration module is connected to the flue gas detection main valve. The particulate matter detection area includes a particulate matter detection solenoid valve, a particulate matter sensor, and a particulate matter air pump connected in sequence. The particulate matter detection solenoid valve is connected to the flue gas detection main valve.

[0011] The gas suction unit includes a suction solenoid valve and a suction air pump connected in sequence. The suction solenoid valve is in communication with the mixing chamber, so that the suction air pump sucks the flue gas from the tobacco product contained in the cigarette holder into the mixing chamber.

[0012] In an alternative embodiment, the end of the gas detection area is in communication with the beginning of the particulate matter detection area.

[0013] Preferably, the gas detection area further includes a gas detection damping chamber, which is located between the gas sensor and the gas detection air pump and is connected to the gas sensor and the gas detection air pump.

[0014] Preferably, the gas detection area further includes a gas detection flowmeter, which is connected to the gas detection air pump.

[0015] In an alternative embodiment, the particulate matter detection area further includes a second air filtration module, a particulate matter detection flowmeter, and a particulate matter detection damping chamber, which are connected in series in sequence from the particulate matter sensor to the particulate matter air pump and are located between the particulate matter sensor and the particulate matter air pump.

[0016] In an alternative embodiment, the dilution gas path unit further includes a dilution gas path air filtration module, which is connected to the dilution air pump and is used to filter the external air entering the dilution air pump.

[0017] Preferably, the dilution gas path unit further includes a dilution gas path damping chamber, which is located between the dilution air pump and the dilution solenoid valve.

[0018] Preferably, the dilution gas path unit further includes a dilution gas path flowmeter, which is located between the dilution air pump and the dilution solenoid valve; more preferably, the dilution gas path flowmeter is located between the dilution gas path damping chamber and the dilution solenoid valve.

[0019] In an alternative embodiment, the gas suction unit includes a third air filtration module and a fourth air filtration module, which are respectively located at the normally open end and the normally closed end of the suction solenoid valve.

[0020] Preferably, the gas suction unit further includes an air extraction flowmeter and an air extraction shock absorption chamber, which are connected in series between the air extraction solenoid valve and the air extraction pump in sequence.

[0021] In an alternative embodiment, the gas sensor is a four-in-one sensor, including a CO sensor, a CO2 sensor, a TVOC sensor, and a temperature and humidity sensor.

[0022] In an alternative embodiment, the dilution flow rate of the dilution pump is the same as the discharge flow rate of the particulate matter pump, both being 2 - 10 L / min.

[0023] Preferably, the detection range of the particulate matter sensor is 1 - 500 mg / m 3 。

[0024] Preferably, the flow rate of the air extraction pump is 0.7 - 1.5 L / min, the suction frequency is 30 - 60 s, and the suction capacity is 35 - 75 mL.

[0025] Preferably, the volume of the mixing chamber is 100 - 800 mL.

[0026] In an alternative embodiment, the box body further includes a panel and an upper cover. The panel is located on the upper surface of the box body, and the upper cover covers the box body.

[0027] Preferably, the panel is further provided with a plurality of openings, and a protective cover is correspondingly arranged on each opening. The openings are correspondingly arranged with the mixing chamber, the first air filtration module, the second air filtration module, and the dilution gas path air filtration module.

[0028] Preferably, it further includes an exhaust gas filtration component, which is located at one end of the box body away from the cigarette holder and is connected to the outlet end of the flue gas detection unit.

[0029] Preferably, the panel is further provided with a display screen component and a communication module.

[0030] In a second aspect, the present invention provides a method for flue gas suction and detection, which is applied to the system according to any one of the foregoing embodiments, including placing a tobacco product in the cigarette holder, using the air extraction pump to extract air, pumping the flue gas into the mixing chamber, allowing the dilution gas to enter the mixing chamber through the dilution gas path unit to be mixed and diluted with the flue gas, and then passing through the flue gas detection unit to respectively detect the particulate matter content and gas component content in the flue gas.

[0031] In a third aspect, the present invention provides an application of the system according to any one of the foregoing embodiments in the field of tobacco detection.

[0032] The present invention has the following beneficial effects:

[0033] The present invention provides a portable flue gas suction and detection system, method and application. By setting a mixing chamber and a dilution unit, the concentration of the flue gas can be diluted to a suitable range for detection, ensuring the detection accuracy. By setting a flue gas detection unit, the flue gas passes through the gas detection area, first separating the particulate matter in the flue gas, and then entering the gas sensor for detection to analyze the content of each substance in the gas component. Part of the flue gas is shunted from the detection main valve to the particulate matter detection area for detection in the particulate matter sensor to measure the particulate matter content in the flue gas. Through the above method, the flue gas parameters (gas parameters and particulate parameters) of tobacco products can be quickly detected online. At the same time, each structure is simple, the volume is small, and it can be integrated in a box, having better portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic diagram of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0037] Figure 3 It is a schematic internal structure diagram of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0038] Figure 4 It is a schematic diagram of the air extraction process of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of the detection process of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0040] Figure 6 It is a result diagram of detecting the CO2, TVOC, and CO concentrations of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0041] Figure 7 It is a result diagram of detecting the particulate matter concentration of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0042] Figure 8Schematic diagram for calibrating the particulate matter sensor of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0043] Figure 9 Schematic diagram for calibrating the gas sensor of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0044] Figure 10 Comparison chart of TVOC detection results and standard instrument results of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0045] Figure 11 Schematic diagram for calibrating the dilution gas flowmeter of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0046] Figure 12 Schematic diagram for calibrating the air extraction flowmeter of the portable flue gas suction and detection system provided by the first embodiment of the present invention;

[0047] Figure 13 Result chart for detecting the particulate matter concentration of the portable flue gas suction and detection system provided by the second embodiment of the present invention.

[0048] Description of main component symbols: 100 - Portable flue gas suction and detection system; 110 - Box body; 111 - Panel; 112 - Upper cover; 113 - Protection cover; 120 - Cigarette holder; 131 - Mixing chamber; 140 - Dilution gas path unit; 141 - Dilution gas pump; 142 - Dilution solenoid valve; 143 - Dilution gas path air filtration module; 144 - Dilution gas path shock absorption chamber; 145 - Dilution gas path flowmeter; 150 - Flue gas detection unit; 151 - Flue gas detection main valve; 152 - Gas detection area; 1521 - Gas detection solenoid valve; 1522 - First air filtration module; 1523 - Gas sensor; 1524 - Gas detection air pump; 1525 - Gas detection shock absorption chamber; 1526 - Gas detection flowmeter; 153 - Particulate matter detection area; 1531 - Particulate matter detection solenoid valve; 1532 - Particulate matter sensor; 1533 - Particulate matter air pump; 1534 - Second air filtration module; 1535 - Particulate matter detection flowmeter; 1536 - Particulate matter detection shock absorption chamber; 160 - Gas suction unit; 161 - Air extraction solenoid valve; 162 - Air extraction air pump; 163 - Third air filtration module; 164 - Fourth air filtration module; 165 - Air extraction flowmeter; 166 - Air extraction shock absorption chamber; 170 - Tail gas filtration assembly; 180 - Display screen assembly; 190 - Communication module. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. For those not specified in the embodiments, the conventional conditions or the conditions recommended by the manufacturer are followed. For the reagents or instruments without indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0050] The features and performance of the present invention will be further described in detail below in conjunction with the embodiments.

[0051] First Embodiment

[0052] Please refer to Figures 1 to 3 , this embodiment provides a portable flue gas suction and detection system 100, including a box body 110, a cigarette holder 120, a mixing unit, a dilution gas path unit 140, a flue gas detection unit 150, and a gas suction unit 160.

[0053] The cigarette holder 120 is installed on the box body 110 and is made of aluminum alloy. It can fix common cigarettes and can also be adapted to e-cigarettes or heat-not-burn tobacco products through structures such as air pipes and adapters. The cigarette holder 120 provided in this embodiment is also designed with a structure for placing Cambridge filter pads to collect the particulate matter of the flue gas for off-line detection.

[0054] The mixing unit, the dilution gas path unit 140, the flue gas detection unit 150, and the gas suction unit 160 are all arranged inside the box body 110.

[0055] The mixing unit includes a mixing chamber 131, and the mixing chamber 131 is made of aluminum alloy. In this embodiment, a detachable protective cover 113 is provided above the mixing chamber 131 for easy cleaning. The volume of the mixing chamber 131 is 100 - 800 ml, and a plurality of adapters are arranged on its outer side, which are respectively connected to the flue gas outlet of the cigarette holder 120, the gas outlet of the dilution gas path unit 140, the gas inlet of the flue gas detection unit 150, and the gas inlet of the suction unit to realize the functions of flue gas suction, dilution, mixing, and detection, as follows.

[0056] The dilution gas path unit 140 includes a dilution gas path air filtration module 143, a dilution gas pump 141, and a dilution solenoid valve 142. The dilution gas pump 141 is connected to the external air, and the dilution gas path air filtration module 143 is connected to the dilution gas pump 141 for filtering the external air entering the dilution gas pump 141; the dilution gas pump 141, the dilution solenoid valve 142, and the mixing chamber 131 are connected in sequence to provide clean dilution gas into the mixing chamber 131 to avoid the influence of the dilution gas on the detection of particulate matter, CO2, CO, and TVOC in the flue gas.

[0057] By adjusting the dilution solenoid valve 142, it is possible to control whether dilution gas is introduced into the mixing chamber 131 and the flow rate of the introduced dilution gas, so as to ensure that the flue gas concentration in the mixing chamber 131 meets the detection range of the flue gas detection unit 150.

[0058] In this embodiment, the dilution flow rate of the dilution gas pump 141 is 2 - 10 L / min.

[0059] In this embodiment, the dilution gas path unit 140 further includes a dilution gas path shock absorption chamber 144, which is located between the dilution gas pump 141 and the dilution solenoid valve 142 and is used to reduce the impact of the gas on the subsequent structure.

[0060] Furthermore, the dilution gas path unit 140 further includes a dilution gas path flowmeter 145, which is located between the dilution gas path shock absorption chamber 144 and the dilution solenoid valve 142 to clarify the flow rate of the dilution gas.

[0061] The flue gas detection unit 150 is a structure for detecting particulate matter and gas components in the flue gas, including a flue gas detection main valve 151, a gas detection area 152, and a particulate matter detection area 153. Both the gas detection area 152 and the particulate matter detection area 153 are connected to the flue gas detection main valve 151, and the flue gas detection main valve 151 is connected to the mixing chamber 131 to control the entry of flue gas into the gas detection area 152 and / or the particulate matter detection area 153; the flue gas is branched at the flue gas detection main valve 151, with a part entering the gas detection area 152 for detection and the other part entering the particulate matter detection area 153 for detection.

[0062] The gas detection area 152 includes a gas detection solenoid valve 1521, a first air filtration module 1522, a gas sensor 1523, and a gas detection air pump 1524 connected in sequence. The gas detection solenoid valve 1521 is connected to the flue gas detection main valve 151; by branching at the flue gas detection main valve 151, the flue gas entering the gas detection area 152 passes through the first air filtration module 1522 to filter out impurities such as particulate matter, avoiding the influence of impurities such as particulate matter in the flue gas on the service life of the gas sensor 1523.

[0063] In this embodiment, the end of the gas detection area 152 is communicated with the beginning of the particulate matter detection area 153.

[0064] Furthermore, the gas detection area 152 further includes a gas detection shock absorption chamber 1525, which is located between the gas sensor 1523 and the gas detection air pump 1524 and is connected to the gas sensor 1523 and the gas detection air pump 1524.

[0065] In addition, the gas detection area 152 further includes a gas detection flowmeter 1526, which is connected to the gas detection air pump 1524.

[0066] The particulate matter detection area 153 includes a particulate matter detection solenoid valve 1531, a particulate matter sensor 1532, and a particulate matter air pump 1533 that are connected in sequence. The particulate matter detection solenoid valve 1531 is connected to the total flue gas detection valve 151, and the flue gas directly passes through the particulate matter detection.

[0067] Furthermore, the particulate matter sensor 1532 is a light scattering type sensor, and the preferred measurement range is 1 - 500 mg / m 3 .

[0068] In this embodiment, the particulate matter detection area 153 further includes a second air filtration module 1534, a particulate matter detection flowmeter 1535, and a particulate matter detection shock absorption chamber 1536 that are connected in series in sequence from the particulate matter sensor 1532 to the particulate matter air pump 1533 between the particulate matter sensor 1532 and the particulate matter air pump 1533.

[0069] Preferably, the flow split ratio of the flue gas in the gas detection area 152 and the particulate matter detection area 153 is 10 - 200, and the total suction flow rate is 2 - 10 L / min. Among them, in order to ensure the intake and exhaust balance of the system, the dilution flow rate of the dilution air pump 141 is the same as the discharge flow rate of the particulate matter air pump 1533, for example, both are 2 - 10 L / min.

[0070] In this embodiment, the gas sensor 1523 is a four-in-one sensor, including a CO sensor, a CO2 sensor, a TVOC sensor, and a temperature and humidity sensor. Among them, the CO sensor is an electrochemical sensor, the CO2 sensor is a non-dispersive infrared sensor, and the TVOC sensor is a photoionization detection sensor, which are respectively used to detect CO, CO2, and TVOC in the gas. In addition, this four-in-one gas sensor 1523 also includes an integrated miniaturized temperature, humidity, and pressure sensor, which can simultaneously output the temperature and humidity parameters of the flue gas.

[0071] The gas suction unit 160 includes an air extraction solenoid valve 161 and an air extraction air pump 162 that are connected in sequence. The air extraction solenoid valve 161 is communicated with the mixing chamber 131, so that the air extraction air pump 162 sucks the flue gas from the tobacco product accommodated in the cigarette holder 120 into the mixing chamber 131.

[0072] In this embodiment, the gas suction unit 160 includes a third air filtration module 163 and a fourth air filtration module 164. The third air filtration module 163 and the fourth air filtration module 164 are respectively located at the normally open end and the normally closed end of the air extraction solenoid valve 161, and are used to remove particulate matter in the flue gas to be sucked to extend the service life of the third air filtration module 163 and the fourth air filtration module 164.

[0073] Further, the gas suction unit 160 further includes an air extraction flowmeter 165 and an air extraction shock absorption chamber 166, and the air extraction flowmeter 165 and the air extraction shock absorption chamber 166 are connected in series between the air extraction solenoid valve 161 and the air extraction pump 162 in sequence.

[0074] Preferably, the flow rate of the air extraction pump 162 is 0.7 - 1.5 L / min, the suction frequency is 30 - 60 s, and the suction capacity is 35 - 75 mL.

[0075] In this embodiment, the box body 110 further includes a panel 111 and an upper cover 112. The panel 111 is located on the upper surface of the box body 110, and the upper cover 112 covers the box body 110 to prevent damage to the internal structure.

[0076] In this embodiment, a plurality of openings are further provided on the panel 111, and a protective cover 113 is correspondingly provided on each opening. The openings are correspondingly arranged with the mixing chamber 131, the first air filtration module 1522, the second air filtration module 1534, and the dilution gas path air filtration module 143, facilitating the cleaning of the mixing chamber 131, the first air filtration module 1522, the second air filtration module 1534, and the dilution gas path air filtration module 143.

[0077] Preferably, a tail gas filtration assembly 170 is further included. The tail gas filtration assembly 170 is located at one end of the box body 110 away from the cigarette holder 120 and is connected to the outlet end of the flue gas detection unit 150 for filtering the gas flowing out after detection.

[0078] Preferably, a display screen assembly 180, a communication module 190, and a battery module are further provided on the panel 111. The display screen assembly 180 is a touch display screen, the communication module 190 is a structure with 4G data transmission function, and the battery module is a lithium-ion battery. By designing the communication module 190, the detection results of each sensor can be quickly transmitted online to a computer, realizing the simultaneous online detection of particulate matter and gas components in flue gas.

[0079] This embodiment also provides a method for flue gas suction and detection, which is applied to the aforementioned system and includes as Figure 4 shown, only open the air extraction solenoid valve 161, place a traditional cigarette in the cigarette holder 120, the extracted flue gas passes through the third air filtration module 163, the air extraction pump extracts air for 3 s, and the flue gas is extracted into the mixing chamber 131, then close the air extraction solenoid valve 161; as Figure 5As shown, the dilution solenoid valve 142 is opened, and the dilution gas enters the mixing chamber 131 through the dilution gas path unit 140 to be mixed and diluted with the flue gas; the mixed flue gas enters the flue gas detection unit 150. After being split, a part of the flue gas enters the gas detection area 152 to detect CO, CO2, and TVOC (total volatile organic compounds) therein, and another part of the flue gas enters the particulate matter detection area 153 to detect the particulate matter content therein. The detection results output signals through the communication module 190, and the test is completed.

[0080] In this mode, the suction time is set to 3 s, the suction volume is 55 mL, the suction interval is 57 s, and the number of suction puffs is 5. Put a common cigarette sample in the cigarette holder 120. After lighting the cigarette, plot the detection signal against time. The results of three tests are as Figure 6 and Figure 7 shown.

[0081] From Figure 6 and Figure 7 it can be seen that the system and method provided by the embodiments of the present invention have good reproducibility and can be applied to the detection of tobacco products.

[0082] The portable flue gas suction and detection system 100 provided by this embodiment also has a calibration mode. Refer to Figure 8 , only open the total flue gas detection valve 151 and the particulate matter detection solenoid valve 1531, and introduce a standard gas with a known particle concentration at the interface of the cigarette holder 120 to calibrate the particulate matter sensor 1532. Then, connect a flow meter at the interface of the cigarette holder 120 to calibrate the particulate matter detection flow meter 1535.

[0083] Refer to Figure 9 , only open the gas detection solenoid valve 1521, and connect a flow meter to the normally closed end of the gas detection solenoid valve 1521 to calibrate the gas detection flow meter 1526. It is also possible to connect a standard gas to calibrate the gas sensor 1523.

[0084] Refer to Figure 10 , connect the standard gas to other gas detection standard devices to compare the accuracy and stability with this portable system. Introduce the same TVOC standard gas into the system provided by this embodiment and the gas detection standard device for detection. Among them, the detection results of the system provided by this embodiment are shown by the ▲ marks in the figure, and the detection results of the gas detection standard device are shown by the marks in the figure. From Figure 10 it can be seen that the detection results of the system provided by this embodiment are accurate and can be used to evaluate the composition of the flue gas.

[0085] Refer to Figure 11, only open the dilution solenoid valve 142. Calibration of the dilution gas flowmeter 145 in the dilution gas path unit 140 can be achieved by passing through the dilution solenoid valve 142 and connecting a flowmeter to the interface of the cigarette holder 120.

[0086] Please refer to Figure 12 , only open the air extraction solenoid valve 161. Calibration of the air extraction flowmeter 165 in the air extraction path can be achieved by passing through the air extraction solenoid valve 161 and connecting a flowmeter to the interface of the cigarette holder 120.

[0087] Second Embodiment

[0088] The portable flue gas suction and detection system 100 of this embodiment is the same as that of the first embodiment, except that the cigarette holder 120 in this embodiment contains an electronic cigarette, and the electronic cigarette is connected to the inlet of the cigarette holder 120 through an adapter tube.

[0089] Set the suction time to 3 s, the suction volume to 55 mL, the suction interval to 57 s, and the number of suction puffs to 80. After starting the electronic cigarette, plot the detection signal against time, and the particulate matter test results are as Figure 13 shown. It can be seen from Figure 13 that the portable flue gas suction and detection system 100 provided in this embodiment can achieve real-time detection of particulate matter in the flue gas and has excellent application value.

[0090] Third Embodiment

[0091] The portable flue gas suction and detection system 100 of this embodiment is the same as that of the first embodiment, except that the cigarette holder 120 in this embodiment contains heat-not-burn tobacco, and the heat-not-burn tobacco is connected to the inlet of the cigarette holder 120 through an adapter tube.

[0092] Set the suction time to 3 s, the suction volume to 55 mL, the suction interval to 57 s, and the number of suction puffs to 40.

[0093] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable smoke extraction and detection system, characterized in that: It includes a box body, a cigarette holder, a mixing unit, a dilution gas path unit, a smoke detection unit and a gas suction unit; The cigarette holder is installed on the box body, and the mixing unit, the dilution gas path unit, the smoke detection unit and the gas suction unit are all arranged in the box body; The mixing unit comprises a mixing chamber, and the cigarette holder is in communication with the mixing chamber so that smoke enters the mixing chamber; The dilution gas circuit unit includes a dilution gas pump and a dilution solenoid valve, the dilution gas pump is connected to the external air, and the dilution gas pump, the dilution solenoid valve and the mixing chamber are connected in sequence to provide dilution gas into the mixing chamber; The smoke detection unit comprises a smoke detection main valve, a gas detection area and a particle detection area, the gas detection area and the particle detection area are both connected to the smoke detection main valve, and the smoke detection main valve is connected to the mixing chamber to control smoke entering the gas detection area and / or the particle detection area; the gas detection area comprises a first air filter module, a gas detection solenoid valve, a gas sensor and a gas detection air pump connected in sequence, and the first air filter module is connected to the smoke detection main valve; the particle detection area comprises a particle detection solenoid valve, a particle sensor and a particle air pump connected in sequence, and the particle detection solenoid valve is connected to the smoke detection main valve; The gas suction unit comprises a suction solenoid valve and a suction air pump which are connected in sequence. The suction solenoid valve is communicated with the mixing chamber so that the suction air pump can suck smoke from the tobacco product contained in the cigarette holder into the mixing chamber.

2. The system according to claim 1, characterized in that The end of the gas detection area is connected to the beginning of the particle detection area; Preferably, the gas detection area further comprises a gas detection damping chamber, wherein the gas detection damping chamber is located between the gas sensor and the gas detection air pump and is connected to the gas sensor and the gas detection air pump; Preferably, the gas detection area further comprises a gas detection flow meter, and the gas detection flow meter is connected to the gas detection air pump.

3. The system according to claim 1, characterized in that The particle detection area also includes a second air filter module, a particle detection flowmeter and a particle detection damping chamber between the particle sensor and the particle air pump, which are connected in series in a direction from the particle sensor to the particle air pump.

4. The system according to claim 3, characterized in that The dilution gas circuit unit further comprises a dilution gas circuit air filter module, the dilution gas circuit air filter module is connected to the dilution gas pump and is used to filter the external air entering the dilution gas pump; Preferably, the dilution gas circuit unit further comprises a dilution gas circuit damping chamber, and the dilution gas circuit damping chamber is located between the dilution gas pump and the dilution solenoid valve; Preferably, the dilution gas circuit unit further comprises a dilution gas circuit flow meter, and the dilution gas circuit flow meter is located between the dilution gas pump and the dilution solenoid valve; more preferably, the dilution gas circuit flow meter is located between the dilution gas circuit damping chamber and the dilution solenoid valve.

5. The system according to claim 1, characterized in that The gas suction unit comprises a third air filter module and a fourth air filter module, wherein the third air filter module and the fourth air filter module are respectively located at the normally open end and the normally closed end of the air extraction solenoid valve; Preferably, the gas suction unit further comprises a suction flow meter and a suction shock absorbing chamber, and the suction flow meter and the suction shock absorbing chamber are sequentially connected in series between the suction solenoid valve and the suction air pump.

6. The system according to claim 1, characterized in that The gas sensor is a four-in-one sensor, including a CO sensor, a CO2 sensor, a TVOC sensor and a temperature and humidity sensor.

7. The system according to claim 1, characterized in that The dilution flow rate of the dilution air pump is the same as the discharge flow rate of the particle air pump, both of which are 2 to 10 L / min; Preferably, the detection range of the particle sensor is 1 to 500 mg / m 3 ; Preferably, the flow rate of the suction air pump is 0.7-1.5 L / min, the suction frequency is 30-60 s, and the suction capacity is 35-75 mL; Preferably, the volume of the mixing chamber is 100-800 mL.

8. The system according to claim 4, characterized in that The box body further comprises a panel and an upper cover, wherein the panel is located on the upper surface of the box body, and the upper cover is covered on the box body; Preferably, the panel is further provided with a plurality of openings, each opening is correspondingly provided with a protective cover, and the openings are correspondingly provided with the mixing chamber, the first air filter module, the second air filter module and the dilution air path air filter module; Preferably, it further comprises an exhaust gas filter assembly, which is located at one end of the box body away from the cigarette holder and connected to the outlet end of the smoke detection unit; Preferably, a display screen assembly and a communication module are also provided on the panel.

9. A method for smoke extraction and detection, characterized in that: The system applied to any one of claims 1 to 8 comprises placing a tobacco product in the cigarette holder, using the suction air pump to draw air to draw the smoke into the mixing chamber, the dilution gas passes through the dilution gas path unit into the mixing chamber to be mixed and diluted with the smoke, and then passes through the smoke detection unit to respectively detect the particulate matter content and gas component content in the smoke.

10. Application of the system according to any one of claims 1 to 8 in the field of tobacco detection.

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