Cigarette smoke generating device

Abstract

The application provides a cigarette smoke generating device, and relates to the technical field of smoke simulation, and is designed to solve the problem that the existing cigarette smoke generating device cannot simulate the mainstream smoke generating state when a person smokes naturally, thereby causing deviation of research results. The device comprises an air pump, a control valve, a timing numerical control unit and a smoke generating cavity. The smoke generating cavity is provided with an air inlet, an air outlet and a smoke inlet. The control valve is arranged at the air inlet. The control valve has an air inlet position for connecting the air source with the air inlet and a cut-off position for cutting off the air source from the air inlet. The timing numerical control unit is used to switch the control valve between the air inlet position and the cut-off position. The air pump is used to provide power for the air source to enter the smoke generating cavity from the air inlet. The airflow entering the smoke generating cavity from the air inlet can blow the smoke entering through the smoke inlet towards the air outlet. The application can simulate the mainstream smoke generating state of a cigarette when a person smokes, so that the research results are more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smoke simulation, in particular to a cigarette smoke generating device. BACKGROUND

[0002] More and more researches show that smoking is harmful to human health, for example, smoking can cause lung cancer and also can cause and aggravate cardiovascular and cerebrovascular diseases. By generating cigarette smoke and collecting and analyzing harmful chemical components in the cigarette smoke, it is helpful to evaluate the harm of cigarette smoke to human health and to clarify the mechanism of health effects. Moreover, in the performance evaluation of some air purifiers, cigarette smoke is also needed as a standard test substance to evaluate the purification effect of air purifiers on solid particulate matter.

[0003] The existing cigarette smoke generating device mostly adopts a continuous suction mode, which cannot simulate the mainstream smoke generating state when a person smokes naturally, so that the generated tobacco smoke composition is different from that when a person smokes naturally, thereby causing deviation of research results. In addition, the existing smoke generating device has a complex structure, is inconvenient to operate, and is relatively expensive. SUMMARY

[0004] The present application aims to provide a cigarette smoke generating device to solve the technical problem that the existing cigarette smoke generating device cannot simulate the mainstream smoke generating state when a person smokes naturally, thereby causing deviation of research results.

[0005] The cigarette smoke generating device provided by the present application comprises an air pump, a control valve, a timing numerical control unit and a smoke generating cavity, wherein the smoke generating cavity is provided with an air inlet, an air outlet and a smoke inlet, the control valve is arranged at the position of the air inlet, the control valve has an air inlet position for connecting an air source with the air inlet and a cut-off position for cutting off the air source from the air inlet; the timing numerical control unit is electrically connected with the control valve, and the timing numerical control unit is used to switch the control valve between the air inlet position and the cut-off position; the air pump is communicated with the smoke generating cavity, and the air pump is used to provide power for the air source to enter the smoke generating cavity from the air inlet, and the airflow entering the smoke generating cavity from the air inlet can blow the smoke entering from the smoke inlet to the air outlet.

[0006] Further, the smoke generating cavity comprises an air inlet section and an air outlet section arranged in sequence along a straight line from the air inlet, and a smoke inlet section connected perpendicularly between the air inlet section and the air outlet section, and the air inlet section, the air outlet section and the smoke inlet section form a convergence space at the communication positions, wherein the air inlet is arranged at one end of the air inlet section away from the convergence space, the air outlet is arranged at one end of the air outlet section away from the convergence space, and the smoke inlet is arranged at one end of the smoke inlet section away from the convergence space.

[0007] Further, the cigarette smoke generating device further comprises a first variable-diameter pipe, the first variable-diameter pipe is arranged in the air inlet section, a large-diameter end of the first variable-diameter pipe is connected with the air inlet, a small-diameter end of the first variable-diameter pipe is directed to the intersection space, and the small-diameter end of the first variable-diameter pipe is arranged close to the intersection space.

[0008] Further, the cigarette smoke generating device further comprises a second variable-diameter pipe, the second variable-diameter pipe is arranged in the smoke inlet section, a large-diameter end of the second variable-diameter pipe is connected with the smoke inlet, a small-diameter end of the second variable-diameter pipe is directed to the intersection space, and the small-diameter end of the second variable-diameter pipe is arranged close to the intersection space.

[0009] Further, the first variable-diameter pipe and the second variable-diameter pipe are both conical pipes.

[0010] Further, the control valve is a three-way electromagnetic valve, the control valve has a first valve port, a second valve port and a third valve port, the first valve port is connected with the air source, the second valve port is connected with the air inlet, the third valve port is communicated to the external environment, wherein, in the air inlet position, an air path between the first valve port and the second valve port is conducted, and an air path between the first valve port and the third valve port is cut off; in the cut-off position, the air path between the first valve port and the second valve port is cut off, and the air path between the first valve port and the third valve port is conducted.

[0011] Further, along the flow direction of the air source to the air inlet, the air pump is arranged upstream of the control valve.

[0012] Further, the cigarette smoke generating device further comprises a purification element, the purification element is arranged between the air pump and the control valve.

[0013] Further, the smoke inlet is provided with a fixed suction nozzle, the fixed suction nozzle is configured to fix a cigarette.

[0014] Further, the smoke generating cavity is made of glass.

[0015] The cigarette smoke generating device has the following beneficial effects:

[0016] By setting the cigarette smoke generating device mainly composed of an air pump, a control valve, a timing numerical control unit and a smoke generating cavity, when in use, cigarette smoke can enter the smoke generating cavity through the smoke inlet; the timing numerical control unit starts the control valve once every certain period of time, so that the control valve switches between the air inlet position and the cut-off position once every certain period of time. When the control valve is in the air inlet position, under the pumping action of the air pump, the air source can enter the smoke generating cavity through the air inlet, so as to blow the smoke entering through the smoke inlet to the air outlet; when the control valve is in the cut-off position, the communication state between the air source and the air inlet is cut off, so that the air source cannot enter the smoke generating cavity through the air inlet, thereby simulating the cigarette mainstream smoke generation state when a person smokes naturally. In the process of simulating the generation of cigarette smoke by using the above-mentioned cigarette smoke generating device, the cigarette smoke discharged can be collected through the air outlet to meet the testing requirements of cigarette smoke.

[0017] The cigarette smoke generating device realizes the intermittent suction process of cigarette smoke by the above-mentioned setting, thereby effectively simulating the cigarette mainstream smoke generation state when a person smokes, so that the research result is closer to the real smoking process, and the deviation of the research result is reduced. In addition, the cigarette smoke generating device has the advantages of simple structure, convenient operation, stable and reliable performance and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0019] Figure 1 The structural schematic diagram of the cigarette smoke generating device provided by the embodiments of the present application.

[0020] Explanation of reference signs:

[0021] 100-air pump; 200-control valve; 300-timing numerical control unit; 400-smoke generating cavity; 500-first variable diameter pipe; 600-second variable diameter pipe; 700-purification element; 800-fixed suction nozzle; 900-cigarette;

[0022] 210-first valve port; 220-second valve port; 230-third valve port;

[0023] 410-air inlet section; 411-air inlet; 420-air outlet section; 421-air outlet; 430-smoke inlet section; 431-smoke inlet; 440-intersection space. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] Figure 1 This is a schematic diagram of the cigarette smoke generating device provided in this embodiment. Figure 1 As shown, this embodiment provides a cigarette smoke generating device, including an air pump 100, a control valve 200, a timing digital control unit 300, and a smoke generating chamber 400. Specifically, the smoke generating chamber 400 has an air inlet 411, an air outlet 421, and a smoke inlet 431. The control valve 200 is located at the air inlet 411 and has an air inlet position connecting the air source to the air inlet 411 and a cut-off position cutting off the air source from the air inlet 411. The timing digital control unit 300 is electrically connected to the control valve 200 and is used to control the control valve 200 to switch between the air inlet position and the cut-off position. The air pump 100 is connected to the smoke generating chamber 400 and is used to provide the air source power to enter the smoke generating chamber 400 from the air inlet 411. The airflow entering the smoke generating chamber 400 from the air inlet 411 can blow the smoke entering from the smoke inlet 431 toward the air outlet 421.

[0026] When in use, the cigarette smoke generator allows cigarette smoke to enter the smoke generation chamber 400 through the smoke inlet 431. The timer control unit 300 activates the control valve 200 periodically, causing it to switch between an intake position and a cut-off position at regular intervals. Specifically, when the control valve 200 is in the intake position, the air source is pumped into the smoke generation chamber 400 through the air inlet 411 by the air pump 100, thus blowing the smoke from the smoke inlet 431 towards the exhaust port 421. When the control valve 200 is in the cut-off position, the connection between the air source and the air inlet 411 is severed, preventing air from entering the smoke generation chamber 400, thereby simulating the mainstream smoke generation state of a cigarette 900 during natural smoking. During the simulation of cigarette smoke generation using this device, the emitted cigarette smoke can be collected through the exhaust port to meet the testing requirements.

[0027] This cigarette smoke generator, through the aforementioned design, achieves an intermittent inhalation process of cigarette smoke, thereby effectively simulating the mainstream smoke generation state of cigarettes during human smoking. This makes the research results closer to the real smoking process and reduces the bias in the research findings. Furthermore, this cigarette smoke generator has a simple structure, is easy to operate, has stable and reliable performance, and is inexpensive.

[0028] In one embodiment, the control logic of the timing numerical control unit 300 for controlling the control valve 200 is: the control valve 200 is started for 2 seconds and stopped for 30 seconds, that is, the timing numerical control unit 300 switches the control valve 200 to the air inlet position for 2 seconds and switches the control valve 200 to the closed position for 30 seconds each time, so as to simulate the generation state of the mainstream cigarette smoke when a person smokes naturally.

[0029] It should be noted that, in the embodiment, how to use the timing numerical control unit 300 to realize the switching of the control valve 200 can be obtained by those skilled in the art according to the prior art, and the embodiment does not improve it, so it will not be repeated here.

[0030] In the embodiment, the gas source can be air.

[0031] Please continue to refer to Figure 1 In the embodiment, the smoke generation cavity 400 includes an air inlet section 410 and an air outlet section 420 arranged in a straight line from the air inlet 411 in turn, and a smoke inlet section 430 connected perpendicularly between the air inlet section 410 and the air outlet section 420, wherein the air inlet section 410, the air outlet section 420 and the smoke inlet section 430 form a convergence space 440 at the communication, the air inlet 411 is arranged at one end of the air inlet section 410 away from the convergence space 440, the air outlet 421 is arranged at one end of the air outlet section 420 away from the convergence space 440, and the smoke inlet 431 is arranged at one end of the smoke inlet section 430 away from the convergence space 440. That is, the smoke generation cavity 400 is roughly in the form of a T-shaped cavity structure.

[0032] When the cigarette smoke generation device is working, the airflow entering the air inlet section 410 from the air inlet 411 moves in the direction of the convergence space 440 under the power of the air pump 100. This part of the airflow will generate negative pressure at the end of the smoke generation cavity 400 connected with the convergence space 440 during the flow process, providing power for the smoke entering the smoke generation cavity 400, so that the smoke can smoothly enter the smoke generation cavity 400 through the smoke inlet 431 and further flow in the direction of the convergence space 440; when the smoke flows to the position of the convergence space 440, it will be blown to the air outlet 421 by the gas entering the air inlet section 410 from the air inlet 411 and having a certain power, so as to realize the collection of smoke at the air outlet 421.

[0033] By setting the smoke generation cavity 400 in the above form, the smoke can be sucked into the smoke inlet section 430 from the smoke inlet 431 only by using the flow power of the airflow in the air inlet section 410, without the need to additionally set a power source for the smoke entering process. Moreover, the linear arrangement of the air inlet section 410 and the air outlet section 420 not only facilitates processing and manufacturing, but also ensures the flatness of the inner wall of the smoke generation cavity 400, reduces the airflow fluctuation caused by the bending of the cavity wall, and thus reduces the pressure loss of the airflow.

[0034] Please continue to refer to Figure 1 In this embodiment, the air outlet section 420 has a certain length, and the length of the air inlet section 410 is substantially equal to the length of the air outlet section 420.

[0035] Please continue to refer to Figure 1 In this embodiment, the cigarette smoke generating device can further include a first variable-diameter pipe 500. Specifically, the first variable-diameter pipe 500 is arranged in the air inlet section 410, the large-diameter end of the first variable-diameter pipe 500 is connected to the air inlet 411, the small-diameter end of the first variable-diameter pipe 500 faces the convergence space 440, and the small-diameter end of the first variable-diameter pipe 500 is arranged close to the convergence space 440.

[0036] The arrangement of the first variable-diameter pipe 500 makes the airflow entering from the air inlet 411 experience a pipe section with gradually decreasing pipe diameter during the flow process. After the airflow flows through the first variable-diameter pipe 500, the flow rate increases and the fluid pressure decreases according to the Venturi effect, so that a larger negative pressure can be generated at the position of the convergence space 440 to increase the power of smoke entering, so that the smoke can smoothly enter the smoke inlet section 430 and flow towards the convergence space 440.

[0037] Please continue to refer to Figure 1 In this embodiment, the cigarette smoke generating device can further include a second variable-diameter pipe 600. Specifically, the second variable-diameter pipe 600 is arranged in the smoke inlet section 430, the large-diameter end of the second variable-diameter pipe 600 is connected to the smoke inlet 431, the small-diameter end of the second variable-diameter pipe 600 faces the convergence space 440, and the small-diameter end of the second variable-diameter pipe 600 is arranged close to the convergence space 440.

[0038] By arranging the above-mentioned second variable-diameter pipe 600 in the smoke inlet section 430, the airflow resistance of the smoke inlet section 430 can be maintained, wherein the resistance of the smoke inlet section 430 mainly comes from the narrow part of the second variable-diameter pipe 600 and the cigarette 900. Although the length of the cigarette 900 gradually decreases as the cigarette 900 continues to burn, the air inlet resistance of the cigarette 900 part gradually decreases, but since the resistance of the narrow part of the second variable-diameter pipe 600 is much greater than the resistance of the cigarette 900 part, the change of the resistance of the cigarette 900 has very limited influence on the overall resistance of this air path of the smoke inlet section 430, that is, the change of the resistance of the cigarette 900 basically does not affect the overall resistance of this air path, thereby ensuring the stability of the airflow of the smoke inlet section 430, so that the cigarette 900 burns at a uniform speed, and further so that the airflow velocity of the mainstream smoke of the cigarette 900 is stable when the mainstream smoke is discharged from the air outlet 421.

[0039] In addition, by arranging the small-diameter end of the second reducing pipe 600 close to the intersection space 440, i.e., arranging the small-diameter end of the second reducing pipe 600 close to the small-diameter end of the first reducing pipe 500, the small-diameter end of the first reducing pipe 500 and the small-diameter end of the second reducing pipe 600 are as close as possible, which is also helpful to reduce the fluid pressure formed after the airflow passes through the first reducing pipe 500, so as to more efficiently suck the smoke from the second reducing pipe 600, and further to generate a larger suction force at a smaller pump flow rate.

[0040] Please continue to refer to Figure 1 In the embodiment, the first reducing pipe 500 and the second reducing pipe 600 are both conical pipes. This arrangement makes the pipe diameters of the first reducing pipe 500 and the second reducing pipe 600 gradually decrease, and the decreasing process of the pipe diameters is relatively smooth, which is conducive to reducing the flow resistance of the airflow to ensure the flow rate of the airflow.

[0041] Please continue to refer to Figure 1 In the embodiment, the control valve 200 can be a three-way electromagnetic valve. Specifically, the control valve 200 has a first valve port 210, a second valve port 220, and a third valve port 230. The first valve port 210 is connected with the gas source, the second valve port 220 is connected with the air inlet 411, and the third valve port 230 is communicated to the external environment. In the air inlet position, the gas path between the first valve port 210 and the second valve port 220 is conducted, and the gas path between the first valve port 210 and the third valve port 230 is cut off. In the cut-off position, the gas path between the first valve port 210 and the second valve port 220 is cut off, and the gas path between the first valve port 210 and the third valve port 230 is conducted.

[0042] In the working process of the cigarette smoke generating device, when the timing numerical control unit 300 switches the control valve 200 to the air inlet position, the gas path between the first valve port 210 and the second valve port 220 is conducted, and the gas path between the first valve port 210 and the third valve port 230 is cut off, so that the gas source can enter the smoke generating cavity 400 through the air inlet 411 to realize the discharge of the cigarette smoke to the air outlet 421. When the timing numerical control unit 300 switches the control valve 200 to the cut-off position, the gas path between the first valve port 210 and the second valve port 220 is cut off, and the gas path between the first valve port 210 and the third valve port 230 is conducted, so that the gas source no longer enters the smoke generating cavity 400, but is directly discharged to the external environment through the third valve port 230 of the control valve 200, thereby achieving the purpose of intermittent discharge of the smoke from the air outlet 421, realizing the effective simulation of the cigarette mainstream smoke generation state when a person smokes, and ensuring the accuracy of the research results.

[0043] The control valve 200 is arranged in this way, which can well realize the conduction and cut-off between the air source and the smoke generating cavity 400, and directly discharge the air as the air source to the external environment in the cut-off state, without causing pollution to the environment, without the need for additional treatment of the air source, easy to realize, and further reduces the cost of the cigarette smoke generating device of the embodiment. In addition, the control valve 200 is arranged as a solenoid valve, which can ensure the reliability of controlling the control valve 200.

[0044] In the embodiment, the control valve 200 can be a two-position three-way solenoid valve.

[0045] Please continue to refer to Figure 1 In the embodiment, along the flow direction of the air source to the air inlet 411, the air pump 100 is arranged upstream of the control valve 200. This arrangement makes the air pump 100 arranged closer to the air source, which can reduce the air suction resistance of the air pump 100.

[0046] Please continue to refer to Figure 1 In the embodiment, the cigarette smoke generating device can further include a purification element 700, and specifically, the purification element 700 is arranged between the air pump 100 and the control valve 200.

[0047] By arranging the above-mentioned purification element 700, the water and particulate matter and other impurities in the air source can be effectively removed, to further reduce the interference with the research results. Moreover, by arranging the purification element 700 between the air pump 100 and the control valve 200, the cleanliness of the air source flowing through the control valve 200 is ensured, the adverse effects on the control valve 200 are reduced, and thus the service life of the control valve 200 is prolonged.

[0048] Please continue to refer to Figure 1 In the embodiment, the smoke inlet 431 is provided with a fixed suction nozzle 800, wherein the fixed suction nozzle 800 is configured to fix the cigarette 900.

[0049] By arranging the fixed suction nozzle 800 at the smoke inlet 431, the cigarette 900 can be effectively fixed, and the stability of smoke generation is ensured.

[0050] In the embodiment, the material of the smoke generating cavity 400 is glass.

[0051] By arranging the smoke generating cavity 400 as a glass material, on the one hand, researchers can directly see the smoke generation inside the smoke generating cavity 400, and timely find the attachment of pollutants inside the smoke generating cavity 400, and on the other hand, it is also convenient to clean the smoke generating cavity 400, to prevent the cavity air passage from being blocked due to the failure to clean the attached tobacco tar on the cavity wall after the cigarette smoke generating device is used for a period of time.

[0052] In actual use, the air inlet 411, the air outlet 421 and the smoke inlet 431 of the smoke generating cavity 400 can be used to clean the smoke generating cavity 400.

[0053] The working principle of the cigarette smoke generating device is as follows: when working, the cigarette 900 is placed in the fixed mouthpiece 800 and ignited, air is taken as the air source, and the air is input into the air path through the air pump 100 so that the air passes through the purification element 700 to remove the moisture, particulate matters and other impurities in the air; the timing numerical control unit 300 controls the control valve 200, and the control valve 200 is started to operate for 2 seconds every 30 seconds, wherein, when the control valve 200 is in the air inlet position that the first valve port 210 and the second valve port 220 are in conduction and the first valve port 210 and the third valve port 230 are cut off, the purified air enters the smoke generating cavity 400, and when the control valve 200 is in the cut-off position that the first valve port 210 and the third valve port 230 are in conduction and the first valve port 210 and the second valve port 220 are cut off, the purified air is discharged to the external environment through the third valve port 230, and the intermittent control of the control valve 200 by the timing numerical control unit 300 realizes the simulation of the cigarette 900 mainstream smoke generating state when a person smokes naturally; after the air enters the smoke generating cavity 400 from the air inlet 411, according to the Venturi effect, the flow rate of the air increases after passing through the first reducing pipe 500, and the fluid pressure decreases, so that the cigarette 900 mainstream smoke can enter the smoke generating cavity 400 through the second reducing pipe 600; when the cigarette smoke moves to the position of the intersection space 440 through the second reducing pipe 600, under the fluid dynamic force of the air inlet section 410, the cigarette smoke will move towards the air outlet section 420, and finally be discharged from the air outlet 421, so as to achieve the collection purpose of the smoke at the air outlet 421.

[0054] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the protection scope of the present application should be limited by the scope defined by the claims.

[0055] Finally, it should be noted that, in this document, the term "for example" is used to introduce illustrative examples, the terms "include" and / or "comprise," or variations such as "includes" and / or "comprises," as well as the terms "including" and / or "comprising," or variations such as "has," "have," "has" and / or "has," as used herein, are meant to be equivalent to the term "comprising" and therefore specify the presence of stated features, elements, steps, and / or components, but do not preclude the presence or addition of one or more other features, elements, steps, and / or components. Furthermore, as used herein, the term "and / or" means and / or. In addition, as used herein, the term "if' can be construed to mean "when" or "when a condition is met." Also, as used herein, the term "includes" or "comprising" means includes or comprising, but not limited to.

[0056] In the above embodiments, the orientation terms such as "inner," "outer," and the like are based on the figures shown.

[0057] The above description of disclosed embodiments provides enabling teaching for those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cigarette smoke generating device, characterized by comprising: The cigarette smoke generating device comprises an air pump (100), a control valve (200), a timing numerical control unit (300) and a smoke generating cavity (400), wherein the smoke generating cavity (400) is provided with an air inlet (411), an air outlet (421) and a smoke inlet (431), the control valve (200) is arranged at the position of the air inlet (411), the control valve (200) has an air inlet position for connecting the air source with the air inlet (411) and a cut-off position for cutting off the air source with the air inlet (411); the timing numerical control unit (300) is electrically connected with the control valve (200), and the timing numerical control unit (300) is used for switching the control valve (200) between the air inlet position and the cut-off position; the air pump (100) is communicated with the smoke generating cavity (400), and the air pump (100) is used for providing power for the air source entering the smoke generating cavity (400) from the air inlet (411), and the air flow entering the smoke generating cavity (400) from the air inlet (411) can blow the smoke entering from the smoke inlet (431) to the air outlet (421); the smoke generating cavity (400) comprises an air inlet section (410) and an air outlet section (420) arranged in sequence along a straight line from the air inlet (411), and a smoke inlet section (430) connected perpendicularly between the air inlet section (410) and the air outlet section (420), the air inlet section (410), the air outlet section (420) and the smoke inlet section (430) form a meeting space (440) at the communication position, the air flow entering the air inlet section (410) from the air inlet (411) moves to the direction of the meeting space (440) under the power of the air pump (100), so as to generate negative pressure at the end of the smoke generating cavity (400) connected with the meeting space (440), and provide power for the smoke entering the smoke generating cavity (400); the cigarette smoke generating device further comprises a first variable diameter pipe (500), the first variable diameter pipe (500) is arranged in the air inlet section (410), the large diameter end of the first variable diameter pipe (500) is connected with the air inlet (411), the small diameter end of the first variable diameter pipe (500) faces the meeting space (440), and the small diameter end of the first variable diameter pipe (500) is arranged close to the meeting space (440); the cigarette smoke generating device further comprises a second variable diameter pipe (600), the second variable diameter pipe (600) is arranged in the smoke inlet section (430), the large diameter end of the second variable diameter pipe (600) is connected with the smoke inlet (431), the small diameter end of the second variable diameter pipe (600) faces the meeting space (440), and the small diameter end of the second variable diameter pipe (600) is arranged close to the meeting space (440).

2. The cigarette smoke generating device according to claim 1, characterized by The air inlet (411) is arranged at one end of the air inlet section (410) away from the intersection space (440), the air outlet (421) is arranged at one end of the air outlet section (420) away from the intersection space (440), and the smoke inlet (431) is arranged at one end of the smoke inlet section (430) away from the intersection space (440).

3. The cigarette smoke generating device according to claim 2, characterized by The first variable diameter pipe (500) and the second variable diameter pipe (600) are both conical pipes.

4. The cigarette smoke generating device according to claim 1, wherein The control valve (200) is a three-way electromagnetic valve, and has a first valve port (210), a second valve port (220) and a third valve port (230). The first valve port (210) is connected with a gas source, the second valve port (220) is connected with the air inlet (411), and the third valve port (230) is communicated to the outside environment. In the air inlet position, the gas path between the first valve port (210) and the second valve port (220) is conducted, and the gas path between the first valve port (210) and the third valve port (230) is cut off. In the cut-off position, the gas path between the first valve port (210) and the second valve port (220) is cut off, and the gas path between the first valve port (210) and the third valve port (230) is conducted.

5. The cigarette smoke generating device according to claim 1, wherein The gas pump (100) is arranged upstream of the control valve (200) in the flow direction of the gas source to the air inlet (411).

6. The cigarette smoke generating device according to claim 5, wherein The cigarette smoke generating device further comprises a purification element (700) arranged between the gas pump (100) and the control valve (200).

7. The cigarette smoke generating device according to claim 1, wherein The smoke inlet (431) is provided with a fixed mouthpiece (800) configured to fix a cigarette (900).

8. The cigarette smoke generating device according to any one of claims 1 to 7, characterized in that, The material of the smoke generating cavity (400) is glass.

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