Cooling tube for aerosol-generating product

Abstract

The present invention belongs to the technical field of novel tobacco, and particularly relates to a cooling tube for an aerosol-generating product. The cooling tube comprises an aerosol-generating matrix section, a functional section and a filter tip section, the functional section comprising a cooling section, and the cooling section consisting of a hollow cooling tube and an airflow dispersion part which is non-compressedly and slidably arranged within a cavity of the hollow cooling tube. The technical solution provides the airflow dispersion part in the cavity of the hollow cooling tube, and when aerosol generated by an aerosol matrix enters the cavity of the hollow cooling tube, the aerosol is obstructed by the airflow dispersion part and thus changes the direction, and therefore the aerosol is divided separately by means of the hollow cooling tube and the airflow dispersion part, so as to disperse the airflow concentrated within the cavity of the hollow cooling tube; additionally, in a vaping sate, the airflow dispersion part moves in the cavity of the hollow cooling tube towards the filter tip section, and the displacement thereof reduces the flow rate of aerosol and prolongs the duration of aerosol passing through the hollow cooling tube, thus cooling the aerosol.

Description

A cooling tube for an aerosol-generating product Technical Field

[0001] The invention belongs to the technical field of aerosols, and in particular relates to a cooling tube for an aerosol generating product. Background Art

[0002] Aerosol-generating articles that heat, rather than combust, an aerosol-generating substrate, such as a tobacco-containing substrate, are well known in the art. Typically, in such heated aerosol-generating articles, aerosol is generated by transferring heat from a heating source to the aerosol-generating substrate or material. During use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heating source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.

[0003] Compared with the temperature reached by the combustion pile in conventional cigarettes, the tobacco-containing matrix is ​​usually heated to a lower temperature, such as 200-350°C. This temperature prevents nicotine and some flavoring components in the tobacco matrix from forming aerosols and separates from the tobacco matrix. For this reason, nicotine or flavoring substances are added to the aerosol matrix to provide a satisfactory aerosol content.

[0004] What's puzzling is that the heating temperature of heated aerosol-generating products differs by several hundred degrees from the temperature of the combustion cone of conventional cigarettes. While the temperature of the aerosol drawn out through the filter of a conventional cigarette is ideal, when directly inhaling the filter of a heated aerosol-generating product, which has a lower heating temperature, the temperature is much higher, even making it impossible for the consumer to draw. To address this issue, conventional non-combustion aerosol-generating products reduce the amount of heat transferred from the aerosol matrix by adding a support segment or cooling segment between the aerosol matrix segment and the filter. Furthermore, the various shapes and structures of the support segment or cooling segment, such as a hollow structure, have limited effect on reducing the temperature of the aerosol. Consequently, the temperature at the filter end of the resulting aerosol-generating product still does not reach the optimal temperature, and in particular, the temperature of the first puff remains high. To address this issue, prior art has proposed fixing a structural component within the hollow cavity of the cooling segment to slow the aerosol airflow and achieve cooling. However, the use of this structure increases draw resistance, making drawing more difficult.

[0005] Summary of the Invention

[0006] The object of the present invention is to provide a cooling tube for an aerosol generating product to solve the problem that the aerosol temperature at the filter end of existing non-heating aerosol generating products is high, causing discomfort to consumers.

[0007] A cooling tube for an aerosol-generating product. The aerosol-generating product is heated by an aerosol-generating device to generate an aerosol. The aerosol-generating product includes an aerosol-generating substrate segment, a functional segment, and a filter segment. The functional segment and the filter segment are wrapped with paper to form an integral structure.

[0008] The functional section includes a cooling section, which is composed of a hollow cooling pipe and an air flow dispersion portion non-compressively slidably arranged in the cavity of the hollow cooling pipe.

[0009] Preferably, the air flow dispersion portion is in the shape of a sphere, a cylinder, a cone, a cone combined with a cylinder, or a hemisphere combined with a cylinder.

[0010] Preferably, when the airflow dispersion portion is a cylinder, a cone combined with a cylinder, or a hemisphere combined with a cylinder, a plurality of non-through grooves close to one end of the aerosol generating matrix segment are evenly arranged axially on the outer wall of the cylinder.

[0011] Preferably, in the cross section of the airflow dispersion portion, the total area of ​​the grooves is between 40% and 85% of the cross-sectional area of ​​the cavity of the hollow cooling pipe.

[0012] Preferably, an axially extending cylindrical protrusion is provided at the downstream end of the airflow dispersion portion, and the outer diameter of the protrusion is smaller than the maximum diameter of the airflow dispersion portion.

[0013] Preferably, aerosol is able to pass through the air flow dispersion portion.

[0014] Preferably, the aerosol cannot pass through the wall of the hollow cooling tube.

[0015] Preferably, the inner wall of the hollow cooling tube is provided with a longitudinal shallow groove or a shallow spiral groove, and the depth of the above-mentioned groove is less than one tenth of the wall thickness of the hollow cooling tube.

[0016] Preferably, in a non-suction state, the airflow dispersion portion is arranged at one end of the hollow cooling tube close to the aerosol generating matrix section.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The technical solution of the present invention is to set an air flow dispersion part in the cavity of the hollow cooling tube. When the aerosol generated by the aerosol matrix enters the cavity of the hollow cooling tube, it is blocked by the air flow dispersion part and redirected to be diverted through the air flow dispersion part, while dispersing the air flow concentrated in the cavity of the hollow cooling tube. Combined with the suction state, the air flow dispersion part moves along the cavity of the hollow cooling tube toward the filter section. The displacement slows down the aerosol flow rate while increasing the time for delaying the aerosol to flow through the hollow cooling tube, thereby achieving the purpose of cooling the aerosol. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic diagram of an aerosol-generating article according to the present invention.

[0020] FIG2 is an axial cross-sectional view of FIG1 .

[0021] FIG3 is a schematic diagram of an axial cross-section of the hollow cooling tube of the present invention.

[0022] FIG4 is a schematic diagram of an embodiment of the air flow dispersion portion of the present invention.

[0023] Explanation of the accompanying reference numerals: 1. aerosol generating matrix segment; 2. cooling segment; 3. filter segment; 4. tipping paper; 21. hollow cooling tube; 22. air flow dispersion portion; 221. groove; 222. cylinder; 223. hemisphere; 224. protrusion. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and cannot be interpreted as limiting the technical solution of the present invention.

[0025] As shown in Figures 1 to 3, the present application provides an aerosol-generating product for generating an inhalable aerosol when heated. The aerosol-generating product includes an aerosol-generating matrix segment, a functional segment and a filter segment. The functional segment is located between the aerosol-generating matrix segment and the filter segment. The aerosol matrix segment is located at the upstream end of the functional segment, and the filter segment is located at the downstream end of the functional segment. The aerosol-generating matrix segment contains tobacco material and an aerosol-forming agent. The tobacco material here is not limited. For example, granular materials, tobacco leaves, reconstituted tobacco leaves, etc. processed using tobacco or extracts and other materials can all be used to implement the technical solution of the present application.

[0026] This application also provides a heating device for heating the aerosol-generating product and an aerosol-generating system for controlling the heating device. The heating device is used to control the aerosol generation volume and the number of puffs of the aerosol-generating product. The aerosol-generating matrix also uses an aerosol-forming agent, specifically propylene glycol, glycerol, and other materials currently used in aerosol generators, as well as aroma-producing substances or nicotine.

[0027] The functional segment and the filter segment of the present application are connected together by paper, collectively referred to as the filter segment, and then the filter segment and the aerosol generating substrate are connected using the tipping paper 4 to form an aerosol generating product.

[0028] The functional section of the present application includes a cooling section. In other cases, it may also include other parts, such as a supporting section. The cooling section 2 of the present application consists of a hollow cooling tube 21 and an airflow dispersion portion 22 that is non-compressively slidably arranged in the cavity of the hollow cooling tube. The hollow cooling tube of the present application is made of paper or an organic polymer material, such as polyurethane. If paper is used, a multi-layer hollow tube structure made of paper is used. If an organic polymer material is used, it is formed by injection molding. However, the key point is that the tube wall of the hollow cooling tube of the present application does not have aerosol permeability. In other embodiments of the present application, the inner wall of the hollow cooling tube is provided with longitudinal shallow grooves or shallow spiral grooves. The depth of the above-mentioned grooves is less than one tenth of the wall thickness of the hollow cooling tube. The setting of these grooves 221 is used to change the flow rate or flow direction of the outer part of the airflow entering the hollow cooling tube, which plays a role in partially improving the cooling effect.

[0029] The material of the air flow dispersion part of the present application is a porous material or a structure with pores made of a single material. In the present application, the pores of the air flow dispersion part are not required to be axially through, but can be random pores, but it is sufficient to ensure that the aerosol can pass through the air flow dispersion part during inhalation. Moreover, when the air flow dispersion part of the present application is installed in the cavity of the hollow cooling tube, there is no compression, that is, there is no air flow dispersion part pressing the inner wall of the hollow cooling tube to cause deformation of the air flow dispersion part or deformation of the inner wall of the hollow cooling tube. Instead, it is just installed in the cavity of the hollow cooling tube, and under normal circumstances, the air flow dispersion part cannot move in the cavity of the hollow cooling tube. Only during the suction process, the change in pressure will cause the air flow dispersion part to move in the cavity of the hollow cooling tube.

[0030] The air flow dispersion part of the present application is spherical, cylindrical, cone, cone combined with cylinder, or hemisphere combined with cylinder. It is not required whether the material of the air flow dispersion part is made by compression. The present application only requires that during the suction process, the air flow dispersion part will slide in the cavity of the hollow cooling tube due to the suction force, but cannot cause the air flow dispersion part to drift in the cavity of the hollow cooling tube.

[0031] As shown in Figure 4, in other embodiments of the present application, when the airflow dispersion portion is a cylinder, a cone combined with a cylinder, or a hemisphere combined with a cylinder, a plurality of (for example, 4 or 6) grooves 221 are uniformly arranged axially on the outer wall of the cylinder. In the present application, the groove is non-through at one end close to the aerosol generating matrix segment, and the other end, close to the filter segment, is a through-end groove. In the cross section of the airflow dispersion portion, the sum of the areas of the plurality of grooves is between 40% and 85% of the cross section of the cavity of the hollow cooling tube. The grooves in this part play a role in re-converging the airflow to provide the filter segment with a sufficient amount of aerosol to satisfy the suction feeling.

[0032] When the airflow dispersion part is installed into the hollow cooling tube cavity, the airflow dispersion part is placed near one end of the aerosol generating matrix segment, and when the airflow dispersion part includes a conical structure, the cone tip corresponds to the aerosol generating matrix segment. Similarly, the hemisphere of the airflow dispersion part which is a combination of the hemisphere 223 and the cylinder 222 corresponds to the aerosol generating matrix segment. In this way, when the airflow beam mixed with aerosol transmitted through the aerosol generating matrix segment hits the airflow dispersion part, part of the airflow will pass through the airflow dispersion part, but because of the suction resistance of the airflow dispersion part, part of the airflow will be dispersed. After passing through the airflow dispersion part, it will converge in the cavity of the hollow cooling tube, and part of the aerosol will directly pass through the tube wall of the hollow cooling tube into the filter segment. In this case, the airflow of the aerosol is dispersed and the penetration route is increased, the flow rate is reduced and the stroke is increased, which naturally plays a role in cooling the aerosol.

[0033] In the present application, an axially extending cylindrical protrusion 224 is provided at the downstream end of the airflow dispersion portion, and the outer diameter of the protrusion is smaller than the maximum diameter of the airflow dispersion portion. During the suction process, the airflow dispersion portion may move toward the filter segment due to the suction force, and the protrusion is offset against the filter segment, thereby forming an aerosol containing chamber between the airflow dispersion portion and the upstream of the filter segment. The aerosol collected by the airflow dispersion portion is collected here. On the one hand, the flow rate of the aerosol is reduced by the change in the cross-section, while at the same time ensuring the relative stability of the amount of aerosol inhaled in each puff.

[0034] Especially when taking the first or second puff, when the aerosol in the aerosol generating matrix is ​​not completely mixed with the air to cool down, the air flow dispersion part structure of the present application causes the air flow dispersion part to move toward the filter section within the cavity of the hollow cooling tube under the action of puffing, so that the flow rate of the aerosol in the functional section is further reduced, thereby ensuring that the puffing temperature of the first and / or second puff is suitable for consumers.

[0035] The above description is merely an embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application discloses the preferred embodiments as above, it is not intended to limit the present application. Any technical personnel familiar with the present profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A cooling tube for an aerosol-generating article, the aerosol-generating article being heated by an aerosol-generating device to generate an aerosol, characterized in that, It includes an aerosol - generating substrate section, a functional section, and a filter section; the functional section and the filter section are wrapped into an integral structure by paper. The functional section includes a cooling section, and the cooling section consists of a hollow cooling tube and an air - flow dispersion part non - compressively and slidably arranged in the cavity of the hollow cooling tube.

2. The cooling tube for an aerosol-generating article according to claim 1, wherein, The air - flow dispersion part is spherical, cylindrical, conical, a combination of a cone and a cylinder, or a combination of a hemisphere and a cylinder.

3. The cooling tube for an aerosol-generating article according to claim 2, characterized in that, When the air - flow dispersion part is cylindrical, a combination of a cone and a cylinder, or a combination of a hemisphere and a cylinder, a plurality of non - through grooves are axially and uniformly arranged on the outer side wall of the cylinder near one end of the aerosol - generating substrate section.

4. The cooling tube for an aerosol-generating article according to claim 3, characterized in that, In the cross - section of the air - flow dispersion part, the total area of the grooves is between 40% and 85% of the cross - sectional area of the cavity of the hollow cooling tube.

5. The cooling tube for an aerosol-generating article according to claim 1, characterized in that, A cylindrically - shaped protruding part extending axially is arranged at the downstream end of the air - flow dispersion part, and the outer diameter of the protruding part is smaller than the maximum diameter of the air - flow dispersion part.

6. The cooling tube for an aerosol-generating article according to claim 1, characterized in that, Aerosol can pass through the air - flow dispersion part.

7. The cooling tube for an aerosol-generating article according to claim 1, wherein, Aerosol cannot pass through the tube wall of the hollow cooling tube.

8. The cooling tube for an aerosol-generating article according to claim 7, characterized in that, The inner wall of the hollow cooling tube is provided with longitudinal shallow grooves or shallow spiral grooves, and the depth of the above - mentioned grooves is less than one - tenth of the wall thickness of the hollow cooling tube.

9. The cooling tube for an aerosol-generating article according to claim 1, wherein, In the non - suction state, the air - flow dispersion part is arranged at one end of the hollow cooling tube close to the aerosol - generating substrate section.

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