Cooling pipe for aerosol generating product

Abstract

The invention belongs to the technical field of novel tobaccos, and particularly relates to a cooling pipe for an aerosol generating product, which comprises an aerosol generating matrix section, a functional section and a filter tip section, the functional section comprises a cooling section, and the cooling section is composed of a hollow cooling pipe and an airflow dispersion part arranged in a cavity of the hollow cooling pipe in a non-compression sliding mode. According to the technical scheme, the airflow dispersion part is arranged in the cavity of the hollow cooling pipe, aerosol generated by the aerosol matrix is blocked by the airflow dispersion part to change directions when entering the cavity of the hollow cooling pipe, the aerosol is shunted through the hollow cooling pipe and the airflow dispersion part, meanwhile, airflow concentrated in the cavity of the hollow cooling pipe is dispersed, and the airflow dispersion effect is improved. And in combination with the suction state, the airflow dispersion part moves towards the filter tip section along the cavity of the hollow cooling pipe, so that the time for delaying the aerosol to flow through the hollow cooling pipe is prolonged while the flow speed of the aerosol is slowed down due to the displacement of the airflow dispersion part, and the effect of cooling the aerosol is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of aerosol, and particularly relates to a cooling tube for an aerosol generating article. Background Art

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

[0003] Compared with the temperature reached by the combustion pile in a conventional cigarette, a tobacco-containing substrate is usually heated to a lower temperature, such as 200 - 350 °C. This temperature causes nicotine and some aroma components in the tobacco substrate to be unable to form an aerosol and separate from the tobacco substrate. Therefore, nicotine or flavor substances are externally added to the current aerosol substrate to provide a satisfactory aerosol content.

[0004] Surprisingly, there is a temperature difference of several hundred degrees between the heating temperature of a heated aerosol generating article and the temperature of the combustion cone of a conventional cigarette. However, the temperature of the aerosol drawn through the filter tip of a conventional cigarette is very suitable. But when directly sucking on the filter tip of a heated aerosol generating article with a lower heating temperature, the temperature is much higher, even causing consumers to be unable to suck. To solve this problem, current conventional non-combustible aerosol generating articles all reduce the heat transferred from the aerosol substrate section by adding, for example, a support section or a cooling section between the aerosol substrate section and the filter tip. And the shapes and structures of the support section or the cooling section are diverse, such as a hollow structure, which has limited effect on reducing the temperature of the aerosol. The temperature at the filter tip of the manufactured aerosol generating article still does not reach the optimal temperature, especially the temperature of the first puff is still relatively high. To solve this problem, it is mentioned in the prior art to fix a structural component in the hollow cavity of the cooling section to delay the aerosol airflow to achieve temperature reduction. However, the use of this structure results in an increase in draw resistance and makes the sucking more laborious. Summary of the Invention

[0005] The object of the present invention is to provide a cooling tube for an aerosol generating article to solve the problem that the temperature of the aerosol at the filter tip of a current non-heated aerosol generating article is relatively high, causing discomfort to consumers.

[0006] A cooling tube for an aerosol - generating article, the aerosol - generating article is heated by an aerosol - generating device to generate an aerosol, and the aerosol - generating article includes an aerosol - generating matrix section, a functional section, and a filter section; the functional section and the filter section are wrapped into an integral structure by paper;

[0007] 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.

[0008] Preferably, 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.

[0009] Preferably, when the air - flow dispersion part is a cylinder, 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 matrix section.

[0010] Preferably, 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.

[0011] Preferably, a cylindrical protrusion extending axially is arranged at the downstream end of the air - flow dispersion part, and the outer diameter of the protrusion is smaller than the maximum diameter of the air - flow dispersion part.

[0012] Preferably, the aerosol can pass through the air - flow dispersion part.

[0013] Preferably, the aerosol cannot pass through the tube wall of the hollow cooling tube.

[0014] Preferably, longitudinal shallow grooves or shallow spiral grooves are arranged on the inner wall of the hollow cooling tube, and the depth of the above - mentioned grooves is less than one - tenth of the wall thickness of the hollow cooling tube.

[0015] Preferably, 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 matrix section.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 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 diverted to pass through the air - flow dispersion part for shunting. At the same time, the air flow concentrated in the cavity of the hollow cooling tube is dispersed. Combined with the suction state, the air - flow dispersion part moves along the cavity of the hollow cooling tube towards the filter section direction. The generation of its displacement slows down the flow rate of the aerosol 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

[0018] Figure 1 This is a schematic diagram of the aerosol-generating article of the present invention.

[0019] Figure 2 is Figure 1 axial sectional view of.

[0020] Figure 3 This is a schematic axial sectional view of the hollow cooling tube of the present invention.

[0021] Figure 4 This is a schematic diagram of an embodiment of the air flow dispersion part of the present invention.

[0022] Explanation of reference numerals:

[0023] 1, aerosol-generating matrix section; 2, cooling section; 3, filter section; 4, tipping paper; 21, hollow cooling tube; 22, air flow dispersion part; 221, groove; 222, cylinder; 223, hemisphere; 224, protrusion. Detailed implementation manners

[0024] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be construed as a limitation to the technical solutions of the present invention.

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

[0026] The present application also provides a heating device for heating the aerosol-generating article, and an aerosol-generating system for controlling the heating device, and controls the generation amount of the aerosol of the aerosol-generating article, the number of puffing mouths, etc. by the heating device. An aerosol-forming agent is also used in the aerosol-generating matrix section, specifically materials such as propylene glycol and glycerol that can currently be used as aerosol-generating agents, and also includes aroma-producing aroma substances or nicotine, etc.

[0027] The functional section and the filter section of the present application are connected together by paper and are collectively referred to as the filter section. Then, the filter section and the aerosol-generating matrix are connected into an aerosol-generating article using the tipping paper 4.

[0028] The functional section of this application includes a cooling section. In other cases, it may also include other parts, such as a support section, etc. The cooling section 2 of this application consists of a hollow cooling tube 21 and an air flow dispersion part 22 that is non-compressively and slidably arranged in the cavity of the hollow cooling tube. The material of the hollow cooling tube in this application is paper or an organic polymer material, such as polyurethane, etc. If paper material is used, a multi-layer hollow tube structure is rolled from paper. If an organic polymer material is used, it is formed by injection molding. However, crucially, the inner wall of the hollow cooling tube in this application does not have aerosol permeability. In other embodiments of this application, longitudinal shallow grooves or shallow spiral grooves are provided on the inner wall of the hollow cooling tube. The depth of the above 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 air flow entering the hollow cooling tube, playing a role in partially improving the cooling effect.

[0029] The material of the air flow dispersion part of this application is a porous material or a structure with pores made of one material. In this application, it is not required that the pores of the air flow dispersion part are axially through, but can be random pores, as long as it can ensure that the aerosol can pass through the air flow dispersion part during suction. Moreover, when the air flow dispersion part is installed in the cavity of the hollow cooling tube, there is no compression situation, that is, there is no situation where the air flow dispersion part presses the inner wall of the hollow cooling tube to cause deformation of the air flow dispersion part or 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, due to the change in pressure, the air flow dispersion part will move in the cavity of the hollow cooling tube.

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

[0031] As Figure 4 shown, in other embodiments of this application, when the air flow dispersion part is a cylinder, a combination of a cone and a cylinder, or a combination of a hemisphere and a cylinder, a plurality of (such as 4 or 6) grooves 221 are axially and uniformly arranged on the outer side wall of the cylinder. In this application, one end of the groove close to the aerosol generation matrix section is non-through, and the other end, close to the filter tip section, is a through-end groove. In the cross-section of the air flow dispersion part, 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-collecting the air flow to provide an adequate amount of aerosol to the filter tip section to meet the suction feeling.

[0032] When installing the air flow dispersing part into the cavity of the hollow cooling pipe, place the air flow dispersing part near one end of the aerosol generating substrate section. And when the air flow dispersing part includes a conical structure, the pointed part of the cone corresponds to the aerosol generating substrate section. Similarly, for the air flow dispersing part where the hemisphere 223 is combined with the cylinder 222, the hemisphere corresponds to the aerosol generating substrate section. In this way, when the air flow beam mixed with aerosol transmitted through the aerosol generating substrate section impacts the air flow dispersing part, part of the air flow will pass through the air flow dispersing part. However, due to the suction resistance of the air flow dispersing part, part of the air flow will be dispersed. After passing through the air flow dispersing part, it will converge again in the cavity of the hollow cooling pipe, and part of the aerosol will directly enter the filter section through the pipe wall of the hollow cooling pipe. In this case, the air flow of the aerosol is dispersed and the transmission route is increased, the flow rate is reduced and the travel distance is increased, which naturally plays a role in cooling the aerosol.

[0033] In the present application, a cylindrically protruding part 224 extending axially is provided at the downstream end of the air flow dispersing part. The outer diameter of the protruding part is smaller than the maximum diameter of the air flow dispersing part. During the suction process, due to the suction force, the air flow dispersing part may move towards the filter section direction. By abutting the protruding part against the filter section, an aerosol accommodation cavity is formed between the air flow dispersing part and the upstream of the filter section. The aerosol collected by the air flow dispersing part is collected here. On the one hand, through the change of the cross-section, the flow rate of the aerosol is reduced, and at the same time, the relative stability of the amount of aerosol sucked out per puff is ensured.

[0034] Especially when sucking the first puff or the second puff, at this time, the aerosol in the aerosol generating substrate has not been completely mixed and cooled with air. Through the air flow dispersing part structure of the present application, at this time, under the suction action, the air flow dispersing part moves towards the filter section direction in the cavity of the hollow cooling pipe, so that the flow rate of the aerosol in the functional section is further reduced, thereby ensuring that the suction temperature of the first puff and / or the second puff is suitable for consumers.

[0035] The above is only an embodiment of the present application and does not impose any form of limitation on the present application. Although the present application is disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art, without departing from the scope of the technical solution of the present application, makes some changes or modifications using the technical content disclosed above, which are all 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 airflow dispersion part that is 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 airflow 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, wherein, When the airflow dispersion part is a cylinder, 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 airflow 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 airflow dispersion part, and the outer diameter of the protruding part is smaller than the maximum diameter of the airflow dispersion part.

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

7. The coolant tube for an aerosol-generating article according to claim 1, characterized in that, 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, characterized in that, In the non - puffing state, the airflow dispersion part is arranged at one end of the hollow cooling tube close to the aerosol - generating substrate section.

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