Method for improving aerosol release through negative pressure regulation and control of heated cigarette core section

Abstract

The invention relates to the technical field of heating cigarettes, in particular to a method for improving aerosol release through negative pressure regulation and control of a heating cigarette core section, which comprises the following steps: S1, an adjustable opening is formed in the end part of the heating cigarette core section, and the heating cigarette comprises a filter tip section, a hollow section and a cigarette core section; s2, adjusting the flow of gas entering the cigarette core section of the heated cigarette according to the adjustable opening; s3, according to the adjusted gas flow, negative pressure is formed in the cigarette core section, and the release amount of aerosol in the cigarette core section is adjusted and controlled through the negative pressure. The purpose of the invention is to discover that negative pressure can be used as a power source for generating and releasing aerosol besides heat through tests, the negative pressure value of the environment where the cigarette core section is located is increased, and the generation and release of aerosol can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heated cigarettes, and in particular to a method for improving aerosol release by regulating negative pressure in a core segment of a heated cigarette. Background Art

[0002] For heated cigarettes, the core material can be considered a porous medium. The basic smoking process can be understood as the core material being heated by the smoking device, causing the smoke-generating liquid inside to evaporate. The vapor is entrained by the inhaled airflow, forming an aerosol for the consumer to inhale.

[0003] Currently, the primary factor affecting the aerosol generation efficiency of heated cigarettes is the temperature of the smoking device, using heat as the driving force for aerosol generation and release. Increasing the temperature and heat supply can improve aerosol release, but this can lead to excessively high smoke temperatures and the production of unpleasant odors. Therefore, it is necessary to find alternative sources of energy to promote aerosol release. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method for improving aerosol release by regulating the negative pressure of the heated cigarette core segment. Through experiments, it was found that negative pressure can be used as a power source for aerosol generation and release in addition to heat, and increasing the negative pressure value of the environment in which the cigarette core segment is located can effectively improve the generation and release of aerosol.

[0005] The present invention solves the above technical problems through the following technical means: A method for improving aerosol release by regulating negative pressure in a heated cigarette core segment comprises the following steps: S1. An adjustable opening is provided at the end of the heated cigarette core segment, wherein the heated cigarette comprises a filter segment, a hollow segment and a core segment; S2. According to the adjustable opening, adjust the gas flow rate entering the heated cigarette core segment; S3. According to the adjusted gas flow rate, a negative pressure is formed in the cigarette core section, and the amount of aerosol released in the cigarette core section is regulated by the negative pressure.

[0006] According to the above technical means, by setting an adjustable opening at the end of the heated cigarette core segment, the negative pressure value of the environment in which the core segment is located can be adjusted according to the change amplitude of the opening, so that the negative pressure is used as a power source for aerosol generation and release in addition to heat, which can improve the generation and release of aerosol.

[0007] Preferably, when the opening is enlarged, the gas flow rate entering the heated cigarette core segment increases, the negative pressure in the cigarette core segment decreases, and the aerosol release amount decreases; When the opening is reduced, the gas flow entering the heated cigarette core segment is reduced, the negative pressure in the cigarette core segment is increased, and the amount of aerosol released is increased.

[0008] According to the above technical means, by changing the amplitude of the opening at the end of the cigarette core segment, the gas flow entering the cigarette core segment is regulated to change the negative pressure value inside the cigarette core segment, and then change the amount of aerosol released, so that the negative pressure can serve as the driving force for aerosol generation and release.

[0009] Preferably, the circumferential surface of the hollow section has a plurality of small holes. When the opening at the end of the cigarette core is adjusted from large to small, the negative pressure of the environment at the interface between the hollow section and the cigarette core section changes from -250 Pa to -600 Pa.

[0010] According to the above technical means, by controlling the negative pressure of the environment at the interface between the hollow section and the core section, that is, regulating the negative pressure of the core section, it is helpful to precipitate substances in the core material filled in the core section.

[0011] Preferably, the gas flow rate in the core segment is at least twice the product of the volume of the core segment and the porosity of the core segment.

[0012] According to the above technical means, by regulating the sufficient negative pressure at the junction of the hollow section and the smoke core section, the relationship between the gas flow rate and the volume and porosity of the smoke core section is controlled to ensure that sufficient fresh air enters the smoke core section to renew the internal gas, thereby facilitating inhalation.

[0013] Preferably, the gas flow rate of the cigarette core segment at the opening is 0 to 12 ml / s.

[0014] According to the above technical means, by conducting experiments under the constant suction flow specified in the national standard GBT 22838.5-2009, the gas flow entering the cigarette core section at the opening at different opening amplitudes is tested, which helps to test the relationship between the gas flow and negative pressure, and thus helps to find the relationship between the negative pressure in the cigarette core section and aerosol release.

[0015] Preferably, the gas flow rate of the filter segment is 17.5 ml / s, and the gas flow rate of the small holes in the hollow segment is at least 5.8 ml / s.

[0016] According to the above technical means, by performing suction at a constant suction flow rate specified in the national standard GBT 22838.5-2009, that is, keeping the gas flow rate of the filter segment constant, the gas flow rate of the filter segment is guaranteed. When the amplitude of the opening at the end of the cigarette core segment changes, the air flow rate through the small holes on the hollow segment and the end of the cigarette core segment will change, and the negative pressure value in the cigarette core segment will also change.

[0017] Preferably, in step S3, the amount of aerosol released is 0 to 34.9 mg.

[0018] Preferably, the components of the aerosol include water, propylene glycol, glycerol, and nicotine.

[0019] Preferably, the method further includes adjusting the variation range of the openings according to the number of suction ports.

[0020] According to the above technical means, the variation range of the opening is adjusted by the number of puffs, so that the release amount of aerosol in the cigarette core section can be adjusted, thereby adjusting the smoking taste.

[0021] The present application adopting the above solution has the following beneficial effects: 1. In this application, experiments have demonstrated that negative pressure can serve as a power source for aerosol generation and release in addition to heat in heated cigarettes. By regulating the changes in the negative pressure in the environment surrounding the core segment, the generation and release of aerosol on the core material within the core segment can be improved, thereby enhancing the smoking experience. 2. In this application, an adjustable opening is provided at the end of the cigarette core segment to adjust the gas flow entering the cigarette core segment, thereby adjusting the negative pressure within the cigarette core segment. The method is simple and highly practical. 3. The present application can also adjust the amplitude of the opening by the number of puffs, thereby adjusting the negative pressure change in the cigarette core segment, and then adjusting the amount of aerosol released in the cigarette core segment to adjust the smoking taste and improve the consumer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application may be further illustrated by the non-limiting examples given in the accompanying drawings; Figure 1 This is a flow chart of a method for controlling the negative pressure of a heated cigarette core segment to improve aerosol release according to an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of a heated cigarette in an embodiment of the present application; Figure 3 This is a graph showing the change in static pressure along the axial direction of the cigarette support when the end of the cigarette core segment is completely open in the embodiment of the present application; Figure 4 This is a graph showing the change in static pressure of the adjustable opening at the end of the cigarette core segment along the axial direction of the cigarette support in the embodiment of the present application; Figure 5 This is a graph showing the relationship between the gas flow rate of the smoke core section and the opening degree of the opening in the embodiment of the present application; Figure 6 This is a graph showing the relationship between the negative pressure of the cigarette core section and the gas flow rate in the embodiment of the present application; Figure 7 This is a graph showing the relationship between the total amount of aerosol released and the negative pressure of the cigarette core section in the embodiment of this application. Figure 8 is a graph showing the relationship between the amount of water released and the change in negative pressure in the embodiment of the present application; Figure 9 is a graph showing the relationship between the amount of propylene glycol released and the change in negative pressure in the embodiment of the present application; Figure 10 is a graph showing the relationship between the amount of glycerol released and the change in negative pressure in the embodiment of the present application; Figure 11 is a graph showing the relationship between nicotine release and negative pressure changes in the embodiments of the present application; Among them, 1. Filter section; 2. Hollow section; 3. Cigarette core section. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention: Example 1

[0024] like Figure 1-2 As shown, the embodiment of the present application discloses a method for improving aerosol release by regulating the negative pressure of a heated cigarette core segment, comprising the following steps: S1. An adjustable opening and closing structure is provided at the end of the heated cigarette core segment 3. When the opening and closing structure is opened, an opening is formed in the middle. The heated cigarette includes a filter segment 1, a hollow segment 2, and a cigarette core segment 3. The hollow segment 2 is provided with a plurality of evenly spaced small holes in the circumference. S2 according to the opening adjustment range, adjust the gas flow into the heated cigarette core segment 3; S3. According to the adjusted gas flow rate, a negative pressure is formed in the cigarette core segment 3, and the release amount of aerosol in the cigarette core segment 3 is regulated by the negative pressure.

[0025] In this embodiment, the opening and closing structure can be configured as two movable vertical plates, which are arranged opposite each other. When the two vertical plates are close together, the end of the cigarette core segment 3 is sealed; when the two vertical plates are separated from each other, an opening is formed. The opening amplitude can be 0-100% depending on the distance between the two vertical plates and the degree of obstruction of the end of the cigarette core segment 3. Of course, in actual situations, the opening and closing structure can also be configured as a trumpet shape, a side panel opening and closing type, a flip opening and closing type, etc., and the structure or device that can achieve opening and closing can also be selected according to actual conditions. Example 2

[0026] The method in Example 1 was simulated using a constant suction flow rate of 17.5 mL / s as specified in GBT 22838.5-2009. That is, the suction flow rate of the filter segment 1 was constant at 17.5 ml / s, as follows: The physical structure of a heated cigarette was simulated in computer simulation software. The cigarette had a diameter of 6.3 mm, a filter segment of 7 mm, a hollow segment of 23 mm, a pore diameter of 0.5 mm on the hollow segment, and a core segment of 30 mm. The filter and core segments were configured as uniform porous media with a porosity of 80% for the filter segment and 60% for the core segment. Air was used as the fluid medium during the simulation. An opening and closing structure was provided at the end of the core segment 3 of the heated cigarette, and the opening and closing structure was adjusted from 100% to 0.05% to test the static pressure of the core segment 3. The equation to be solved was the gas flow momentum equation. The test results are shown in Figure 2. Figure 3-4 shown.

[0027] according to Figure 3 It can be seen that when the end of the wick segment 3 is unobstructed, that is, the opening degree is 100%, the gas flow through the wick is large, the internal negative pressure value is low, and the lowest negative pressure is -250 Pa (based on the junction of the hollow segment 2 and the wick segment 3). In addition, the change rate of the negative pressure in the entire wick segment 3 is large, and the negative pressure cannot be used to promote the precipitation of substances in the porous medium wick material.

[0028] As shown in Figure 4, when the opening at the end of the wick segment 3 is 0.05%, that is, after a certain flow resistance is applied, the negative pressure value in the wick segment 3 is relatively high, close to -550 Pa, during inhalation, and the negative pressure change rate of the entire wick segment 3 is significantly reduced, which is conducive to more wick material being in a higher negative pressure environment and promoting the precipitation of substances in the wick material.

[0029] Further experiments were conducted to determine the relationship between the opening width at the end of the core segment 3 and the gas flow rate of the core segment 3, the relationship between the gas flow rate of the core segment 3 and the negative pressure of the environment in which the core segment 3 is located, and the relationship between the total aerosol release and the negative pressure of the core segment 3. The test results are as follows: Figure 5-7 shown.

[0030] according to Figure 5 As can be seen, when the opening at the end of the core segment is 100% open, the flow rate through core segment 3 is 11.7 mL / s, the flow rate through the small holes in hollow segment 2 is 5.8 mL / s, and the total suction flow rate at the filter end is 17.5 mL / s. As the opening gradually decreases, the gas flow rate in core segment 3 initially remains almost unchanged; when the opening is reduced to 40%, the gas flow rate in core segment 3 decreases significantly.

[0031] according to Figure 6It can be seen that when the opening degree of the hole at the end of the cigarette core segment gradually decreases, the suction flow rate at the filter end remains at 17.5 mL / s, the resistance of the gas passing through the cigarette core segment 3 increases, and more gas flows in from the small holes on the hollow segment 2, so the negative pressure value of the cigarette core segment 3 gradually increases.

[0032] according to Figure 7 As can be seen, when the suction negative pressure is low, the opening at the end of the wick segment is 100% full, the negative pressure at the junction of hollow section 2 and wick segment 3 is -250 Pa, and the total substance release per cigarette is 23.2 mg. As the opening decreases, the negative pressure in wick segment 3 increases, and the substance release gradually increases, reaching a maximum value, with the total substance release per cigarette being 34.9 mg. When the opening is further reduced, the gas flow through wick segment 3 decreases sharply, affecting the substance release. When the negative pressure in wick segment 3 reaches -600 Pa, the opening at the end of the wick segment is completely closed. Since no air enters wick segment 3 to entrain the generated substances, the substance release drops sharply to 0 mg.

[0033] Therefore, from Figure 5-7 It can be seen that under a certain gas flow rate, increasing the negative pressure value of the smoke core section 3 can further precipitate substances in the porous medium smoke core material. Example 3

[0034] In this embodiment, the method of Example 1 was used to conduct simulated puffing experiments on the end of the heated cigarette core segment 3 under two conditions: 100% and 3% opening. During the simulation, the fluid medium puffed was air, and the puff flow rate of the filter segment 1 was constant at 17.5 ml / s. The release of water, propylene glycol, glycerol, and nicotine with the change of the number of puffs under the two conditions was tested. The test results are shown as follows: Figure 8-11 shown.

[0035] according to Figure 8 It can be seen that the amount of water released decreases rapidly with the increase in the number of puffs when the end of the heated cigarette core segment 3 is fully open, the opening degree of the opening is 100%, that is, under the state of large flow and low negative pressure, and the amount of water released is about 1.7 mg when the first puff is taken, and the amount of water released is close to 0.5 mg when the seventh puff is taken. When the opening degree of the opening at the end of the heated cigarette core segment 3 is 3%, that is, under the state of small flow and high negative pressure, the amount of water released shows a slowly decreasing trend with the increase in the number of puffs, and the amount of water released is about 2.8 mg when the first puff is taken, and the amount of water released is close to 1.5 mg when the seventh puff is taken.

[0036] according to Figure 9It can be seen that the release amount of propylene glycol, when the end of the core segment 3 of the heated cigarette is fully open, the opening degree of the opening is 100%, that is, under the state of large flow and low negative pressure, shows a trend of first increasing and then rapidly decreasing with the increase in the number of puffs, and the release amount of propylene glycol is about 0.05 mg in the first puff, and the release amount of propylene glycol is close to 0.1 mg after the 7th puff; when the opening degree of the opening at the end of the core segment 3 of the heated cigarette is 3%, that is, under the state of small flow and high negative pressure, the release amount of propylene glycol first increases and then remains stable and then decreases with the increase in the number of puffs, and the release amount of propylene glycol is about 0.1 mg in the first puff, and is between 0.3-0.35 mg after the 2nd to 5th puffs, and is close to 0.15 mg after the 7th puff.

[0037] according to Figure 10 It can be seen that the release of glycerol, when the end of the core segment 3 of the heated cigarette is fully open, the opening degree of the opening is 100%, that is, under the state of large flow and low negative pressure, shows a trend of first increasing and then stabilizing with the increase in the number of puffs, and the release of glycerol is about 0 mg in the first puff, and the release of glycerol is close to 0.1 mg after the 7th puff; when the opening degree of the opening of the end of the core segment 3 of the heated cigarette is 3%, that is, under the state of small flow and high negative pressure, the release of propylene glycol first increases and then remains stable with the increase in the number of puffs, and the release of propylene glycol is about 0.1 mg in the first puff, and the release of glycerol is between 1.0 and 1.15 mg after the 3rd to 7th puffs.

[0038] according to Figure 11 It can be seen that the nicotine release, when the end of the heated cigarette core segment 3 is fully open, the opening degree is 100%, that is, under the conditions of large flow rate and low negative pressure, shows a trend of first increasing and then rapidly decreasing with the increase in the number of puffs, and the nicotine release is about 0.02 mg in the first puff, reaches a maximum of about 0.15 mg after 3-4 puffs, and drops to nearly 0.02 mg after the 7th puff; when the opening degree of the opening at the end of the heated cigarette core segment 3 is 3%, that is, under the conditions of small flow rate and high negative pressure, the nicotine release shows a trend of first increasing, then maintaining stability, then increasing, and finally decreasing with the increase in the number of puffs, and the nicotine release is about 0.05 mg in the first puff, and is between 0.16-0.18 mg after 2-4 puffs, and is close to 0.13 mg after 7 puffs.

[0039] Therefore, from Figure 8-11 It can be seen that by adjusting the opening at the end of the heated cigarette core segment 3, the core segment 3 can have a larger negative pressure during inhalation, thereby promoting the increase in the amount of aerosol released.

[0040] The above describes in detail the method for improving aerosol release by regulating negative pressure in heated cigarette core segments, as provided by the present invention. The description of the specific embodiments is intended only to facilitate understanding of the method and its core concept. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

[0041] It should be noted that if specific experimental steps or conditions are not specified in the examples, the procedures or conditions described in the literature in this field can be followed. If the manufacturer of the reagents or instruments is not specified, they are all commercially available conventional reagents.

[0042] The above examples are provided for a better understanding of the present invention and are not intended to limit the best mode of implementation. They do not limit the content and scope of protection of the present invention. Any product identical or similar to the present invention obtained by anyone under the guidance of the present invention or by combining the features of the present invention with other prior arts shall fall within the scope of protection of the present invention.

Claims

1. A method for improving aerosol release by regulating negative pressure of heated cigarette core segments, characterized in that: The following steps are involved: S1. An adjustable opening is provided at the end of the heated cigarette core segment (3), wherein the heated cigarette comprises a filter segment (1), a hollow segment (2) and a core segment (3); S2. According to the adjustable opening, adjusting the gas flow rate entering the heated cigarette core segment (3); S3. According to the adjusted gas flow rate, a negative pressure is formed in the cigarette core section (3), and the amount of aerosol released in the cigarette core section (3) is regulated by the negative pressure.

2. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 1, characterized in that: When the opening is enlarged, the gas flow rate entering the heated cigarette core segment (3) increases, the negative pressure in the cigarette core segment (3) decreases, and the amount of aerosol released decreases; When the opening is reduced, the gas flow rate entering the heated cigarette core segment (3) is reduced, the negative pressure in the cigarette core segment (3) is increased, and the amount of aerosol released is increased.

3. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 2, characterized in that: The hollow section (2) has a plurality of small holes on its circumferential surface, and when the opening at the end of the cigarette core is adjusted from large to small, the negative pressure of the environment at the interface between the hollow section (2) and the cigarette core section (3) changes from -250 Pa to -600 Pa.

4. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 2, characterized in that: The gas flow rate in the cigarette core segment (3) is at least twice the product of the volume of the cigarette core segment (3) and the porosity of the cigarette core segment (3).

5. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 2, characterized in that: The gas flow rate of the cigarette core section (3) at the opening is 0 to 12 ml / s.

6. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 2, characterized in that: The gas flow rate of the filter segment (1) is 17.5 ml / s, and the gas flow rate of the small holes of the hollow segment (2) is at least 5.8 ml / s.

7. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 2, characterized in that: In the step S3, the release amount of the aerosol is 0 to 34.9 mg.

8. The method for improving aerosol release by regulating negative pressure of heated cigarette core segments according to claim 7, characterized in that: The components of the aerosol include water, propylene glycol, glycerol and nicotine.

9. The method for improving aerosol release by regulating negative pressure of a heated cigarette core segment according to any one of claims 1 to 8, characterized in that: It also includes adjusting the variation of the opening according to the number of suction ports.

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