Cigarette smoke oral cavity simulation absorption device and absorption method

Abstract

The invention provides a cigarette smoke oral cavity simulation absorption device and an absorption method. The absorption device comprises an oral cavity simulation device, a cigarette holder, a smoke trapping device, a suction passage, a smoke exhaust passage, a passage switching device and a sphere compression and relaxation device, the oral cavity simulation device comprises an elastic hollow sphere which contains artificial saliva and is provided with an open end; one end of the smoking passage is connected with the cigarette holder, and the other end is connected with the open end; one end of the smoke exhaust passage is connected with the open end, and the other end is connected with the smoke trapping device; the passage switching device is arranged on the suction passage and the smoke exhaust passage and is used for switching a suction state and a smoke exhaust state; the ball body compression and relaxation device is connected with the outer wall of the elastic hollow ball body to periodically compress and relax the elastic hollow ball body, so that physiological actions of the oral cavity of a human body during cigarette smoking can be more vividly simulated, and more accurate experimental data can be obtained; a reliable data basis is provided for quantitatively researching the deposition of the cigarette mainstream smoke in the oral cavity of a human body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco, in particular to a cigarette smoke oral cavity simulation absorption device and an absorption method. BACKGROUND

[0002] In the physiological process of cigarette smoking, mainstream smoke first enters the oral cavity and undergoes a complex and dynamic retention and interaction process in the oral cavity. Not only does the smoke physically contact the thin layer of saliva on the surface of the oral mucosa, but also its various chemical components undergo adsorption, dissolution, absorption and possible chemical transformation in this process. Therefore, dynamically and realistically simulating this series of biophysical and chemical changes of smoke in the oral cavity is of great significance for accurately evaluating the oral deposition rate of smoke components, studying their interaction mechanism with oral tissues, and even analyzing the consumer's sensory experience.

[0003] Currently, mainstream smoke collection methods, such as Cambridge filter trapping method, can only statically intercept total particulate matter, ignoring the physiological fact that smoke needs to first contact the oral environment. While some improved methods that use simulated artificial saliva to absorb smoke in beakers or impact bottles, although they introduce an absorption medium, are essentially a passive and static dissolution process, and cannot simulate the active suction, muscle movement and respiratory rhythm of the human oral cavity.

[0004] In view of the above technical problems, the prior art proposes some oral cavity simulation devices for cigarette smoke. However, these oral cavity simulation devices still have deficiencies in dynamic fidelity, and are difficult to dynamically simulate the physiological actions of the human oral cavity when smoking cigarettes, resulting in a large gap between the experimental data obtained and the actual physiological process of the human body. SUMMARY

[0005] In view of the technical problem of the deficiencies in dynamic fidelity of the oral cavity simulation devices in the prior art. The present application provides a cigarette smoke oral cavity simulation absorption device and an absorption method that more realistically simulate the physiological actions of the human oral cavity when smoking cigarettes, i.e. "suction-retention-discharge".

[0006] A cigarette smoke oral cavity simulation absorption device, comprising: an oral cavity simulation device comprising an elastic hollow sphere, the inside of the elastic hollow sphere containing artificial saliva, and provided with an open end; a cigarette holder for holding the filter end of a cigarette; a smoke trapping device for trapping the smoke discharged from the oral cavity simulation device; a suction passage, one end of which is connected to the cigarette holder, and the other end of which is connected to the open end of the elastic hollow sphere; a smoke exhaust passage, one end of which is connected to the open end of the elastic hollow ball, and the other end of which is connected to the smoke capturing device; a passage switching device, arranged on the suction passage and the smoke exhaust passage, for switching the oral cavity simulation device between a suction state and a smoke exhaust state; a ball compression and relaxation device, arranged in contact with the outer wall of the elastic hollow ball, for periodically compressing and relaxing the elastic hollow ball; wherein, in the suction state, the suction passage is open, the smoke exhaust passage is closed, and smoke enters the elastic hollow ball through the cigarette holder; and in the smoke exhaust state, the suction passage is closed, the smoke exhaust passage is open, and smoke is exhausted from the elastic hollow ball to the smoke capturing device.

[0007] Further, the ball compression and relaxation device comprises: a fixed support, arranged on one side of the outer wall of the elastic hollow ball; a driving mechanism, arranged on the other side of the outer wall of the elastic hollow ball opposite to the fixed support, comprising a power assembly and a transmission slider connected to the output end of the power assembly, the transmission slider being controlled to make reciprocating linear motion, periodically compressing and relaxing the elastic hollow ball.

[0008] Further, the motion direction of the transmission slider is perpendicular to the contact plane of the elastic hollow ball and the fixed support.

[0009] Further, the power assembly comprises: a driving motor; a lead screw, coaxially connected to the output shaft of the driving motor; a nut seat, sleeved on the lead screw, the transmission slider being arranged on the nut seat; wherein, the driving motor drives the lead screw to rotate, thereby driving the nut seat and the transmission slider to make reciprocating linear motion along the axial direction of the lead screw.

[0010] Further, the ball compression and relaxation device further comprises a reset elastic member, the reset elastic member comprising a first spring and a second spring arranged between the transmission slider and the fixed support respectively and symmetrically arranged with respect to the center of the elastic hollow ball; the first spring and the second spring store energy when the transmission slider compresses the elastic hollow ball, and release energy when the transmission slider retreats, thereby assisting the elastic hollow ball to relax.

[0011] Further, the passage switching device comprises a reversing valve, the reversing valve being provided with: a first interface, connected to the cigarette holder through a first pipeline; a second interface connected with the open end of the elastic hollow sphere through a second pipeline; a third interface connected with the flue gas trapping device through a third pipeline; wherein, in the state of suction, the first interface and the second interface are in communication to conduct the suction passage; in the state of flue gas discharge, the second interface and the third interface are in communication to conduct the flue gas discharge passage.

[0012] Further, the flue gas trapping device comprises a flue gas trap with a Cambridge filter arranged inside; And / or, the material of the elastic hollow sphere is silicone or natural rubber; And / or, the inner surface area of the elastic hollow sphere is 150cm 2 -200cm 2 .

[0013] Further, the elastic hollow sphere has an initial state, which is a pre-compressed state by the sphere compression and relaxation device.

[0014] On the other hand, the present application also provides a method for simulating the absorption of cigarette smoke in the oral cavity, which uses the cigarette smoke oral cavity simulation absorption device of any one of the above embodiments, comprising the following steps: S1: injecting a predetermined volume of artificial saliva into the elastic hollow sphere, and uniformly coating the inner surface of the elastic hollow sphere with artificial saliva by shaking or rolling the elastic hollow sphere; S2: starting the sphere compression and relaxation device to compress and maintain the elastic hollow sphere in a pre-compressed initial state; installing and fixing the cigarette to be tested on the cigarette holder, and lighting the cigarette; S3: controlling the passage switching device to make the suction passage conductive; controlling the sphere compression and relaxation device to relax the elastic hollow sphere to generate negative pressure, thereby sucking the flue gas generated by the burning of the cigarette and making it enter the inside of the elastic hollow sphere; S4: keeping the elastic hollow sphere in a relaxed state, so that the flue gas contacts and stays in the artificial saliva in the elastic hollow sphere for a predetermined time; S5: controlling the passage switching device to switch to make the flue gas discharge passage conductive; controlling the sphere compression and relaxation device to compress the elastic hollow sphere to discharge the flue gas in it and transport it to the flue gas trapping device for trapping; S6: repeating steps S3 to S5 multiple times to simulate the complete smoking process of a single cigarette.

[0015] Further, in step S3, the duration of a single puff is 3 seconds, and the volume of flue gas of a single puff is 55ml; And / or, in step S4, the residence time of the flue gas in the elastic hollow sphere is not less than 20 seconds.

[0016] Compared with the prior art, the cigarette smoke oral cavity simulation absorption device and the absorption method provided by the embodiment of the application have at least the following technical effects: The cigarette smoke oral cavity simulation absorption device comprises an oral cavity simulation device, a cigarette holder, a smoke capturing device, a suction passage, a smoke discharge passage, a passage switching device and a sphere compression and relaxation device. The oral cavity simulation device comprises an elastic hollow sphere, the inside of the elastic hollow sphere is filled with artificial saliva, and an open end is arranged. The cigarette holder is used for clamping the filter end of a cigarette. The smoke capturing device is used for capturing the smoke discharged from the oral cavity simulation device. One end of the suction passage is connected to the cigarette holder, and the other end is connected to the open end of the elastic hollow sphere. One end of the smoke discharge passage is connected to the open end of the elastic hollow sphere, and the other end is connected to the smoke capturing device. The passage switching device is arranged on the suction passage and the smoke discharge passage, and is used for switching the oral cavity simulation device to be in a suction state or a smoke discharge state. The sphere compression and relaxation device is connected to the outer wall of the elastic hollow sphere, and is used for periodically compressing and relaxing the elastic hollow sphere. In the suction state, the suction passage is open, the smoke discharge passage is closed, and the smoke enters the elastic hollow sphere through the cigarette holder. In the smoke discharge state, the suction passage is closed, the smoke discharge passage is open, and the smoke is discharged from the elastic hollow sphere to the smoke capturing device. This design can periodically change the volume of the elastic hollow sphere while keeping the inner surface area basically unchanged, so that the contact absorption area with the smoke is not changed, the physiological action of "suction-retention-discharge" of the human oral cavity when smoking a cigarette can be dynamically, continuously and more realistically simulated, and the deficiency of the prior art in dynamic fidelity is effectively overcome. The deviation of experimental data (such as the oral cavity deposition rate of smoke components) obtained by the cigarette smoke oral cavity simulation absorption device from the actual human physiological data is reduced, and a reliable data basis is provided for the quantitative study of the deposition of cigarette mainstream smoke in the human oral cavity. BRIEF DESCRIPTION OF DRAWINGS

[0017] 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 are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a cigarette smoke oral cavity simulation absorption device in an embodiment of the present application; Figure 2 FIG. 2 is a flow schematic diagram of a cigarette smoke oral cavity simulation absorption method in an embodiment of the present application.

[0019] Reference Signs: 11, elastic hollow sphere; 111, open end; 20, cigarette holder; 30, smoke capturing device; 40, suction passage; 50, smoke discharge passage; 60, reversing valve; 61, first interface; 62, second interface; 63, third interface; 71, fixing support; 721, transmission slider; 722, driving motor; 723, screw rod; 724, nut seat; 731, first spring; 732, second spring; 80, cigarette. DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to understand and read the content disclosed in the present specification by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0023] In the physiological process of cigarette smoking, the mainstream smoke first enters the oral cavity and undergoes a complex and dynamic retention and interaction process in the oral cavity. The smoke not only physically contacts the thin layer of saliva on the surface of the oral mucosa, but also undergoes adsorption, dissolution, absorption and possible chemical transformation of its various chemical components in this process. Therefore, dynamically and realistically simulating this series of biophysical and chemical changes of smoke in the oral cavity is of great significance for accurately evaluating the oral deposition rate of smoke components, studying the interaction mechanism with oral tissues, and even analyzing the sensory experience of consumers.

[0024] Currently, mainstream smoke collection methods, such as Cambridge filter trapping method, can only statically intercept total particulate matter, ignoring the physiological fact that smoke needs to be in contact with oral environment first. While some improved methods that use simulated artificial saliva to absorb smoke in beakers or impact bottles, although introducing absorption medium, are still essentially passive and static dissolution processes, which cannot simulate active suction, muscle movement and breathing rhythm of human oral cavity.

[0025] In view of the above technical problems, some attempts have been made in the prior art. For example, patents CN101718645A, CN102128913A and CN105021741A etc. propose a series of oral cavity simulation devices for cigarette smoke. However, these oral cavity simulation devices still have deficiencies in dynamic fidelity, and are difficult to dynamically simulate the physiological action of human oral cavity when smoking cigarettes, resulting in a large gap between the experimental data obtained and the actual physiological process of human body.

[0026] Please refer to the accompanying Figure 1 The present application provides a cigarette smoke oral cavity simulation absorption device, which comprises an oral cavity simulation device, a cigarette holder 20, a smoke collection device 30, a suction passage 40, a smoke exhaust passage 50, a passage switching device and a ball compression and relaxation device. The oral cavity simulation device comprises an elastic hollow ball 11, which contains artificial saliva inside and is provided with an open end 111. The cigarette holder 20 is used to hold the filter end of a cigarette 80. The smoke collection device 30 is used to collect the smoke discharged from the oral cavity simulation device. One end of the suction passage 40 is connected to the cigarette holder 20, and the other end is connected to the open end 111 of the elastic hollow ball 11. One end of the smoke exhaust passage 50 is connected to the open end 111 of the elastic hollow ball 11, and the other end is connected to the smoke collection device 30. The passage switching device is arranged on the suction passage 40 and the smoke exhaust passage 50, and is used to switch the oral cavity simulation device between suction state and smoke exhaust state. The ball compression and relaxation device is in contact with the outer wall of the elastic hollow ball 11, and is used to periodically compress and relax the elastic hollow ball 11. In the suction state, the suction passage 40 is connected, the smoke exhaust passage 50 is closed, and the smoke enters the elastic hollow ball 11 through the cigarette holder 20. In the smoke exhaust state, the suction passage 40 is closed, the smoke exhaust passage is connected, and the smoke is discharged from the elastic hollow ball 11 to the smoke collection device 30.

[0027] It should be further explained that the artificial saliva is accommodated by the elastic hollow sphere 11, and the sphere compression and relaxation device is integrated, so that the volume and internal pressure of the elastic hollow sphere 11 can be periodically changed while the specific surface area remains basically unchanged, the physiological action of “suction-retention-discharge” of the human oral cavity when smoking can be dynamically, continuously and more realistically simulated, and the deposition mechanism of the smoke in the oral cavity can be more realistically reflected, and the deficiencies of the prior art in dynamic fidelity are effectively overcome. The deviation of the experimental data (such as the oral deposition rate of smoke components) obtained by the cigarette smoke oral simulation absorption device from the actual human physiological data is reduced, and a reliable data basis is provided for the quantitative study of the deposition of cigarette mainstream smoke in the human oral cavity.

[0028] In addition, through the cooperation of the path switching device and the sphere compression and relaxation device, unified programming control can be performed by the central control unit, so that the suction time, retention time and smoke discharge time can be accurately set and adjusted to realize accurate control of the suction rate.

[0029] In this embodiment, the cigarette smoke oral cavity simulation absorption device comprises an oral cavity simulation device, a cigarette holder 20, a smoke capturing device 30, a suction passage 40, a smoke discharge passage 50, a passage switching device, and a spherical body compression and relaxation device. The oral cavity simulation device comprises an elastic hollow spherical body 11, which contains artificial saliva inside and is provided with an open end 111. The cigarette holder 20 is used to hold the filter end of a cigarette 80. The smoke capturing device 30 is used to capture the smoke discharged from the oral cavity simulation device. One end of the suction passage 40 is connected to the cigarette holder 20, and the other end is connected to the open end 111 of the elastic hollow spherical body 11. One end of the smoke discharge passage 50 is connected to the open end 111 of the elastic hollow spherical body 11, and the other end is connected to the smoke capturing device 30. The passage switching device is arranged on the suction passage 40 and the smoke discharge passage 50, and is used to switch the oral cavity simulation device between a suction state and a smoke discharge state. The spherical body compression and relaxation device is in contact with the outer wall of the elastic hollow spherical body 11, and is used to periodically compress and relax the elastic hollow spherical body 11. In the suction state, the suction passage 40 is open, the smoke discharge passage 50 is closed, and the smoke enters the elastic hollow spherical body 11 through the cigarette holder 20. In the smoke discharge state, the suction passage 40 is closed, the smoke discharge passage is open, and the smoke is discharged from the elastic hollow spherical body 11 to the smoke capturing device 30. This design can periodically change the volume of the elastic hollow spherical body 11 while keeping the inner surface area basically unchanged, so as not to change the contact absorption area with the smoke, and can dynamically, continuously, and more realistically simulate the physiological action of the human oral cavity in the process of smoking the cigarette 80, i.e. "suction-retention-discharge", effectively overcoming the shortcomings of the prior art in dynamic realism. The experimental data (such as the oral cavity deposition rate of smoke components) obtained by the cigarette smoke oral cavity simulation absorption device has a smaller deviation from the actual human physiological data, providing a reliable data basis for the quantitative study of the deposition of cigarette mainstream smoke in the human oral cavity.

[0030] It should be further pointed out that the artificial saliva is Greenwood artificial saliva with a pH value of 6.5-7.0, and the formula thereof comprises: NaCl 0.4 g / L, KCl 0.4 g / L, CaCl2·2H2O 0.796 g / L, MgCl2·6H2O 0.204 g / L, KH2PO40.544 g / L, NaHCO3 0.630 g / L, urea 0.13 g / L. Before use, it can be preheated at 37°C for 30 min.

[0031] In some optional embodiments, the ball compression and relaxation device comprises a fixed support 71 and a driving mechanism; the fixed support 71 is arranged on one side of the outer wall of the elastic hollow ball 11; the driving mechanism is arranged on the other side of the outer wall of the elastic hollow ball 11 opposite to the fixed support 71, and the driving mechanism comprises a power assembly and a transmission slider 721 connected to the output end of the power assembly, the transmission slider 721 is controlled to make reciprocating linear motion, and the elastic hollow ball 11 is compressed and relaxed periodically. During the compression of the elastic hollow ball 11 by the transmission slider 721, the fixed support 71 is used to limit the elastic hollow ball 11, so as to ensure that the elastic hollow ball 11 can be compressed smoothly. The contact surface of the fixed support 71 and the elastic hollow ball 11 is provided with a containing groove matched with the outer wall of the elastic hollow ball 11, so as to improve the stability of compression. Optionally, the transmission slider 721 is a slit-shaped metal structure.

[0032] In some optional embodiments, the movement direction of the transmission slider 721 is perpendicular to the contact plane of the elastic hollow ball 11 and the fixed support 71, so as to ensure that the compression force and relaxation force applied to the elastic hollow ball 11 is perpendicular to the contact plane thereof. Optionally, the driving mechanism further comprises a displacement sensor for monitoring the stroke of the transmission slider 721.

[0033] In some optional embodiments, the power assembly comprises a driving motor 722, a lead screw 723 and a nut seat 724; the lead screw 723 is coaxially connected to the output shaft of the driving motor 722; the nut seat 724 is sleeved on the lead screw 723, and the transmission slider 721 is arranged on the nut seat 724; wherein the driving motor 722 drives the lead screw 723 to rotate, drives the nut seat 724 and the transmission slider 721 to make reciprocating linear motion along the lead screw 723 in the axial direction.

[0034] In some other optional embodiments, the power assembly can be but is not limited to a solenoid valve controlled air cylinder, the output end of the solenoid valve controlled air cylinder is connected with the transmission slider 721, and the transmission slider 721 is driven to make reciprocating linear motion, and the elastic hollow ball 11 is compressed and relaxed periodically.

[0035] In some optional embodiments, the ball compression and relaxation device further comprises a reset elastic member, the reset elastic member comprises a first spring 731 and a second spring 732 arranged between the transmission slider 721 and the fixed support 71 respectively and symmetrically arranged with respect to the center of the elastic hollow ball 11; the first spring 731 and the second spring 732 store energy when the transmission slider 721 compresses the elastic hollow ball 11, and release energy when the transmission slider 721 retreats, to assist the elastic hollow ball 11 to reset and relax.

[0036] In some optional embodiments, a first guide rod and a second guide rod are arranged between the transmission sliding block 721 and the fixed support 71, the first guide rod and the second guide rod are symmetrically arranged relative to the center of the elastic hollow sphere 11, the first spring 731 is sleeved on the first guide rod, and the second spring 732 is sleeved on the second guide rod. Under the guidance of the first guide rod and the second guide rod, the transmission sliding block 721 moves linearly along the direction of the first guide rod and the second guide rod, effectively avoiding lateral deviation or swing of the transmission sliding block 721 during movement, and improving the stability of movement.

[0037] In some optional embodiments, the path switching device comprises a reversing valve 60. Specifically, the reversing valve 60 is provided with a first interface 61, a second interface 62 and a third interface 63; the first interface 61 is connected with the cigarette holder 20 through a first pipeline; the second interface 62 is connected with the open end 111 of the elastic hollow sphere 11 through a second pipeline; the third interface 63 is connected with the smoke capturing device 30 through a third pipeline; wherein, in the suction state, the first interface 61 and the second interface 62 are communicated, while the third interface 63 is cut off, so as to guide the suction path 40 and cut off the smoke exhaust path 50; in the smoke exhaust state, the second interface 62 and the third interface 63 are communicated, while the first interface 61 is cut off, so as to guide the smoke exhaust path 50 and cut off the suction path 40. It should be further pointed out that the reversing valve 60 is an electrically driven three-way two-position valve, and the working state of the reversing valve 60 is controlled by unified programming of the central control unit.

[0038] In some optional embodiments, the smoke capturing device 30 comprises a smoke capturer internally provided with a Cambridge filter, which can capture particulate matter, so as to realize analysis and research on the oral deposition behavior of the mainstream smoke of the cigarette 80; and / or the material of the elastic hollow sphere 11 is silica gel or natural rubber.

[0039] In some optional embodiments, the inner surface area of the elastic hollow sphere 11 is 150cm 2 -200cm 2 , and the wall thickness is 3mm. According to the approximate spherical calculation, the inner diameter of the elastic hollow sphere 11 corresponding to the area range is 7.0cm-8.0cm. Among them, the inner surface area of the elastic hollow sphere 11 is set to be between 150cm 2 -200cm 2 , which is close to the actual size of the human oral cavity, thereby improving the reliability of the simulation. In the compression and diastole process of the elastic hollow sphere 11, the inner surface area of the elastic hollow sphere 11 remains basically unchanged.

[0040] In some optional embodiments, the elastic hollow sphere 11 has an initial state, which is a pre-compressed state by the sphere compression and relaxation device. Through the pre-compression, the elastic hollow sphere 11 is deformed and has a negative pressure, which is used as a starting point for subsequent suction and smoke exhaust cycles, thereby reducing the influence of start-up hysteresis on experimental data. The pre-compression amount can be set according to actual needs, which can be, but is not limited to, 100% of the volume of the elastic hollow sphere 11, i.e., a completely compressed state with a volume of zero.

[0041] In addition, please refer to the accompanying Figure 2 An embodiment of the present application provides a cigarette smoke oral cavity simulation absorption method, which uses the cigarette smoke oral cavity simulation absorption device in any of the above embodiments, and comprises the following steps: S1: injecting a predetermined volume of artificial saliva into the elastic hollow sphere 11, and uniformly coating the artificial saliva on the inner surface of the elastic hollow sphere 11 by shaking or rolling the elastic hollow sphere 11; wherein the injection amount of the artificial saliva needs to be determined according to the inner surface area of the elastic hollow sphere 11 and the target film thickness; S2: starting the sphere compression and relaxation device to compress and maintain the elastic hollow sphere 11 in the pre-compressed initial state; installing and fixing the cigarette to be tested 80 on the cigarette holder 20, and igniting the cigarette 80; S3: controlling the passage switching device to make the suction passage 40 conductive; controlling the sphere compression and relaxation device to relax the elastic hollow sphere 11 to generate a negative pressure, thereby sucking the smoke generated by the burning of the cigarette 80 and making it enter the inside of the elastic hollow sphere 11; S4: keeping the elastic hollow sphere 11 in the relaxed state, so that the smoke contacts and stays in the artificial saliva in the elastic hollow sphere 11 for a predetermined time, realizing absorption and dissolution; S5: controlling the passage switching device to switch to make the smoke exhaust passage 50 conductive; controlling the sphere compression and relaxation device to compress the elastic hollow sphere 11, so as to exhaust the smoke in the elastic hollow sphere 11 and transport it to the smoke capture device 30 for capture; S6: repeating steps S3 to S5 multiple times to simulate the complete smoking process of a single cigarette 80.

[0042] Since the cigarette smoke oral cavity simulation absorption method uses the cigarette smoke oral cavity simulation absorption device in any of the above embodiments, it at least has the technical effects of the cigarette smoke oral cavity simulation absorption device embodiments, which will not be repeated here.

[0043] In some optional embodiments, in step S3, the duration of a single puff is 3 seconds, and the smoke volume of a single puff is 55 ml; the time for completing one "suction-staying-exhausting" is 30 seconds. Further, in step S4, the staying time of the smoke in the elastic hollow sphere 11 is not less than 20 seconds.

[0044] The above merely describes the embodiments of the present application, and it should be pointed out that, for those skilled in the art, improvements can be made without departing from the inventive concept, and these improvements shall fall within the protection scope of the present application.

Claims

1. A device for simulating the absorption of cigarette smoke in the oral cavity, characterized in that, include: An oral cavity simulation device includes an elastic hollow sphere containing artificial saliva and having an open end. Cigarette holder, used to hold the filter end of a cigarette; A smoke collection device for collecting smoke emitted from the oral cavity simulation device; The suction passage is connected at one end to the cigarette holder and at the other end to the opening of the elastic hollow sphere. The exhaust passage is connected at one end to the open end of the elastic hollow sphere and at the other end to the smoke collection device. A pathway switching device is provided on the suction pathway and the smoke exhaust pathway, used to switch the oral cavity simulation device to a suction state or a smoke exhaust state. A sphere compression and expansion device is connected to the outer wall of the elastic hollow sphere and is used to periodically compress and expand the elastic hollow sphere. In the suction state, the suction passage is open and the exhaust passage is closed, allowing smoke to enter the elastic hollow sphere through the cigarette holder; in the exhaust state, the suction passage is closed and the exhaust passage is open, allowing smoke to be discharged from the elastic hollow sphere into the smoke collection device.

2. The cigarette smoke oral cavity simulation absorption device according to claim 1, characterized in that, The spherical compression and relaxation device includes: A fixed bracket is disposed on one outer wall of the elastic hollow sphere; The driving mechanism is located on the outer wall of the elastic hollow sphere on the opposite side of the fixed bracket. It includes a power component and a transmission slider connected to the output end of the power component. The transmission slider is controlled to perform reciprocating linear motion, periodically compressing and expanding the elastic hollow sphere.

3. The cigarette smoke oral cavity simulation absorption device according to claim 2, characterized in that, The direction of movement of the transmission slider is perpendicular to the contact plane between the elastic hollow sphere and the fixed bracket.

4. The cigarette smoke oral cavity simulation absorption device according to claim 2, characterized in that, The power assembly includes: Drive motor; The lead screw is coaxially connected to the output shaft of the drive motor; A nut seat is sleeved on the lead screw, and the transmission slider is disposed on the nut seat; The drive motor drives the lead screw to rotate, which in turn causes the nut seat and the transmission slider to reciprocate linearly along the axis of the lead screw.

5. The cigarette smoke oral cavity simulation absorption device according to claim 3, characterized in that, The sphere compression and expansion device further includes a reset elastic element, which includes a first spring and a second spring respectively disposed between the transmission slider and the fixed bracket and arranged symmetrically with respect to the center of the elastic hollow sphere. The first spring and the second spring store energy when the transmission slider compresses the elastic hollow sphere, and release energy when the transmission slider retracts, assisting the elastic hollow sphere in restoring and relaxing.

6. The cigarette smoke oral cavity simulation absorption device according to claim 1, characterized in that, The pathway switching device includes a reversing valve, and the reversing valve is provided with: The first interface is connected to the cigarette holder via a first pipe; The second interface is connected to the open end of the elastic hollow sphere via a second pipe; The third interface is connected to the flue gas collection device via a third pipeline; In the suction state, the first interface and the second interface are connected to conduct the suction path; In the smoke exhaust state, the second interface and the third interface are connected to conduct the smoke exhaust path.

7. The cigarette smoke oral cavity simulation absorption device according to claim 1, characterized in that, The flue gas collection device includes a flue gas collector with a Cambridge filter inside. And / or, the material of the elastic hollow sphere is silicone or natural rubber; And / or, the inner surface area of ​​the elastic hollow sphere is 150 cm². 2 -200cm 2 .

8. The cigarette smoke oral cavity simulation absorption device according to claim 1, characterized in that, The elastic hollow sphere has an initial state, which is a state of pre-compression by the sphere compression and relaxation device.

9. A method for simulating oral cavity absorption of cigarette smoke, characterized in that, The method of using the cigarette smoke oral cavity simulation absorption device as described in any one of claims 1 to 8 includes the following steps: S1: Inject a predetermined volume of artificial saliva into the elastic hollow sphere, and coat the inner surface of the elastic hollow sphere evenly by shaking or rolling the elastic hollow sphere. S2: Activate the sphere compression and relaxation device to compress the elastic hollow sphere and maintain it in the pre-compressed initial state; install and fix the cigarette to be tested on the cigarette holder, and ignite the cigarette; S3: Control the passage switching device to open the suction passage; control the sphere compression and expansion device to expand the elastic hollow sphere, generate negative pressure, thereby sucking in the smoke generated by the combustion of cigarettes and letting it enter the interior of the elastic hollow sphere; S4: Keep the elastic hollow sphere in a relaxed state so that the flue gas comes into contact with the artificial saliva in the elastic hollow sphere and stays for a preset time; S5: Control the path switching device to switch to open the smoke exhaust path; control the sphere compression and expansion device to compress the elastic hollow sphere, discharge the smoke inside and transport it to the smoke collection device for collection. S6: Repeat steps S3 to S5 multiple times to simulate the entire smoking process of a single cigarette.

10. The method for simulating oral cavity absorption of cigarette smoke according to claim 9, characterized in that, In step S3, the duration of a single suction is 3 seconds, and the volume of smoke in a single suction is 55 ml. And / or, in step S4, the residence time of the flue gas in the elastic hollow sphere is not less than 20 seconds.

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