Closed non-combustion heated cigarettes

Abstract

A sealed non-combustion heated cigarette and assembly. The assembly comprises a sealed non-combustion heated cigarette 1 and a heated smoking set 2, and in use, the sealed non-combustion heated cigarette 1 is inserted into the heated smoking set where the cigarette is heated for smoking. The sealed non-combustion heated cigarette 1 comprises a tobacco rod 1-1, a hollow smoke extraction cone 1-2, a smoke delivery tube 1-3, and a filter tip 1-4, which are connected in sequence to abut against each other and wrapped by an external roll connecting material 1-5, and the side wall of the smoke delivery tube 1-3 is provided with at least one through hole 1-3-1, which penetrates the external roll connecting material 1-5; the heated smoking set 2 comprises a heating section 2-1, a cap 2-3, and a sealing ring 2-2, and the heating section 2-1 is provided with a cigarette receiving cavity 2-1-1 and a heating element 2-1-2 therein, and the internal cavity of the cap 2-3 is a gradually expanding structure. Air does not flow through the tobacco section, which reduces the oxygen content of the tobacco section. A sealed structure is used, which prevents tobacco residue from falling. The aromatic components of the tobacco are released more completely, so that the taste is closer to that of traditional cigarettes.

Description

[Technical field]

[0001] The present invention relates to the field of non-combustion heated tobacco products, and in particular to a closed non-combustion heated cigarette and its assembly. [Background technology]

[0002] Traditional tobacco has a history of hundreds of years and has been incorporated into the lives of most smokers. In recent years, with the improvement of people's living standards, people have been paying more attention to issues such as smoking and health, and the harm caused by secondhand smoke, and the harm caused by traditional tobacco products has become more prominent. Meanwhile, with the implementation of the WHO Framework Convention on Tobacco Control, the ban on smoking has gradually expanded, especially in public places around the world, and the development environment for tobacco products has undergone significant and serious changes, and the structure of tobacco products is moving toward diversification and smoke-free development (Non-Patent Document 1). New tobacco products have gradually become a realistic option for major multinational tobacco companies to address the decline in sales of traditional tobacco products (Non-Patent Document 2).

[0003] At present, most non-combustion heated cigarettes adopt air as a smoke carrier to ensure that tobacco does not burn, and compared with traditional cigarettes, the applied heating temperature is usually low, generally not exceeding 300°C, and the aromatic components of new non-combustion heated cigarettes are difficult to fully release, and the amount of smoke is insufficient, so that the cigarettes are not easily accepted by traditional smokers. In addition, in order to ensure air circulation, the tobacco end of most non-combustion heated cigarettes has an open structure, that is, the tobacco fragments or reconstituted tobacco pieces are directly exposed to the outside or connected with the outside atmosphere through a certain air flow channel, and in the process of drawing out the cigarette, tobacco residues are easy to fall off and cause contamination to the smoking set, and as a result, such type of cigarette requires time to be spent to clean the smoking set after a period of use.

[0004] When a closed cigarette structure is adopted, the oxygen content decreases with the heating process (due to the replacement effect of fresh smoke on the internal atmosphere). At this time, even if the heating temperature is increased, no combustion phenomenon occurs, and at the same time, a situation occurs in which tobacco residue falls and contaminates the smoking set. However, since there is no carrier air flow flowing through the tobacco, the movement of cigarette smoke in a closed state becomes difficult.

[0005] The Coanda effect, also known as the wall effect, refers to the tendency of a fluid or air stream to leave its original flow direction and flow with a protruding surface due to surface friction when the fluid flows through the surface of an object. The Venturi effect refers to the low pressure that occurs in the vicinity of a fluid flowing at high speed, causing adsorption. Using the Coanda effect, air entering a small hole can flow along the surface of a hollow smoke extraction cone. Due to the presence of the Venturi effect, the gas flowing at high speed along the surface of the extraction cone creates a negative pressure area at the opening of the extraction cone. The Coanda effect and the Venturi effect can be used to create a concentration and pressure difference inside and outside the enclosed tobacco section, allowing fresh smoke produced by the tobacco section to be extracted using active diffusion of gas. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Xiaobing Cheng, Baojiang Li, Yandong Han. The Development Status of New Tobacco in the World [ J ]. China Tobacco, 2014 (3): 38. [Non-Patent Document 2] Yali Liu, Jinbang Wang, Xinzhang Zhao, et al. Development Status and the Prospect of Heat-not-burn Tobacco Products [ J ]. Chinese Journal of Tobacco, 2018,24 (4) Summary of the Invention

[0007] SUMMARY OF THE PRESENT EMBODIMENT In view of the problems existing in most non-combustion heating cigarettes proposed in the above background, the object of the present invention is to invent a closed type non-combustion heating cigarette and its assembly.

[0008] The closed non-combustion heating cigarette includes a tobacco rod, a hollow smoke extraction cone, a smoke delivery tube, a functional filter tip, and an external roll connecting material. The tobacco rod, the hollow smoke extraction cone, the smoke delivery tube, and the functional filter tip are sequentially connected to each other so as to abut against each other, and are wrapped by the external roll connecting material.

[0009] The periphery and / or the upstream end of the tobacco rod are wrapped with a paper- or foil-based material that is air impermeable or has controllable air permeability to form a sealed structure.

[0010] The hollow smoke extraction cone comprises a cylindrical base and a tapered cone having a tapered cavity therein and the tapered cone has a tapered hole at the top and / or side wall of the tapered cone.

[0011] The peripheral side wall of the smoke delivery tube is provided with at least one through hole passing through the outer roll connector, and preferably the axial distance from the through hole to the base of the cone is less than the axial distance from the tapered hole to the base of the tapered cone.

[0012] A bayonet sealing structure is disposed between the hollow smoke extraction cone and the smoke delivery tube.

[0013] Preferably, the tobacco rod comprises tobacco shreds, tobacco sheets, tobacco particles, tobacco extrudates, or tobacco-containing gels.

[0014] The outer roll connector can be either common wrapping paper, tipping paper, or a heat-resistant and air-impermeable thin material such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK) resin, and silica gel.

[0015] The number of perforations on a smoke delivery tube is inversely proportional to its diameter.

[0016] The sealed non-combustion heating cigarette assembly includes a sealed non-combustion heating cigarette and a sealed heating smoking set.

[0017] The enclosed heated smoking set comprises a heating section, and the heating section comprises a cigarette receiving cavity.

[0018] A heating element is provided on the peripheral sidewall and / or bottom surface of the cigarette accommodating cavity, and when a sealed non-combustion heating cigarette is inserted, the tobacco rod is partially or completely enveloped by the peripheral sidewall of the cigarette accommodating cavity.

[0019] The closed type heated smoking set further comprises a cap, the cap and the heating section being directly detachably connected to each other or detachably connected via a sealing ring, and the cap is provided with a gradually expanding internal cavity.

[0020] The gradually expanding internal cavity of the cap is frusto-conical in shape, the cone apex angle of the gradually expanding internal cavity is 10 degrees or less, and the end of the cap having the smaller inner diameter is detachably connected directly or indirectly to the heating section.

[0021] The use form or process of the present invention is as follows: First, remove the cap of the heated smoking set, insert a closed non-combustion heated cigarette, then put back the cap, lock it, and start heating while the cap is locked. When inhaling, air first enters the space between the cap and the cigarette, then enters the smoke delivery tube through the through hole on the smoke delivery tube of the closed non-combustion heated cigarette, and is sprayed on the surface of the extraction cone. Due to the Venturi effect and the Coanda effect, negative pressure is formed in the tapered hole, and positive pressure is established in the tobacco rod part by heating the tobacco rod, and the existence of the pressure difference between the positive pressure and the negative pressure and its smoke density difference can result in the active diffusion of smoke, so that the smoke flows out of the tapered hole and enters the mouth through the internal cavity and the filter tip of the smoke delivery tube. The smoke delivery tube has the dual functions of smoke extraction and smoke cooling. The smoking resistance of the cigarette can be adjusted by changing the diameter and position of the through hole in the wall of the smoke extraction cavity (i.e., the smoke delivery tube) of the closed non-combustion heated cigarette.

[0022] The advantages of the present invention are as follows: 1. Air does not flow through the tobacco section, so that the oxygen content of the tobacco section can be reduced and the heating temperature can be greatly increased. 2. By adopting a sealed (sealed) structure, tobacco residues do not fall, and the smoking set does not need to be cleaned frequently. 3. The release of tobacco aroma components is more sufficient and easy to release continuously, and the taste is closer to that of traditional cigarettes, which is more acceptable to traditional smokers. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of the overall structure of a closed non-combustion heating cigarette assembly. [Diagram 2] 1 and 2, 1 is a closed type non-combustion heating cigarette assembly, and 2 is a heating-type smoking set. [Diagram 3] FIG. 2 is an axial cross-sectional view of a closed type non-combustion heating cigarette. [Figure 4] 3 and 4 are exploded views of a closed non-combustion heating cigarette before assembly. In Fig. 3 and Fig. 4, 1-1 is a tobacco rod, 1-2 is an extraction cone, 1-2-1 is a cylindrical base, 1-2-2 is a cone, 1-2-2-1 is a tapered hole, 1-2-3 is a tapered cavity, 1-3 is a smoke delivery tube, 1-4 is a filter tip, and 1-5 is an outer roll connector. [Diagram 5] FIG. 1 is a schematic diagram of a hollow smoke extraction cone. [Figure 6] 5 and 6 are axial cross-sectional views of a hollow smoke extraction cone. In Fig. 5 and Fig. 6, 1-2-1 is a cylindrical base, 1-2-2 is a cone, 1-2-2-1 is a tapered hole, and 1-2-3 is a tapered cavity. [Figure 7] FIG. 2 is an axial cross-sectional view of the heated smoking set. [Figure 8] Fig. 8 is an exploded view of the heated smoking set before assembly. In Fig. 7 and Fig. 8, 2-1 is a heating section, 2-1-1 is a cigarette receiving cavity, 2-1-2 is a heating element, 2-2 is a sealing ring, 2-3 is a cap, and 2-3-1 is a gradually expanding internal cavity. [Figure 9] 9 is an axial cross-sectional view of a hollow smoke extraction cone (with a tapered hole opening into the side wall of the cone). In Fig. 9, 1-2-2-1 is the tapered hole, and 1-2-3 is the tapered cavity. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The present invention will be further described with respect to a closed non-combustion heating cigarette and an assembly thereof in conjunction with the accompanying drawings.

[0025] Example 1 The closed non-combustion heating cigarette comprises a tobacco rod 1-1, a hollow smoke extraction cone 1-2, a smoke delivery tube 1-3, a functional filter tip 1-4, and an external roll connecting material 1-5. The tobacco rod 1-1, the hollow smoke extraction cone 1-2, the smoke delivery tube 1-3, and the functional filter tip 1-4 are sequentially connected to each other so as to abut against each other, and are wrapped by the external roll connecting material 1-5 (as shown in FIG. 4).

[0026] The circumferential portion and / or the upstream end surface of the tobacco rod 1-1 are wrapped with a paper-based or foil-based material having air impermeability or controllable air permeability to form a sealed structure.

[0027] The hollow smoke extraction cone 1-2 comprises a cylindrical base 1-2-1 and a tapered cone 1-2-2 provided with a tapered cavity 1-2-3 (as shown in FIG. 3) and the tapered cone 1-2-2 is provided with a tapered hole 1-2-2-1 at the top and / or side wall of the tapered cone (as shown in FIGS. 3, 5, 6 and 9).

[0028] The peripheral side wall of the smoke delivery tube 1-3 is provided with at least one through hole 1-3-1 passing through the outer roll connector 1-5. Preferably, the axial distance of the through hole 1-3-1 from the bottom surface of the tapered cone 1-2-2 is less than the axial distance of the tapered hole 1-2-2-1 from the bottom surface of the tapered cone 1-2-2 (as shown in FIG. 3).

[0029] A bayonet sealing arrangement is disposed between the hollow smoke extraction cone 1-2 and the smoke delivery tube 1-3.

[0030] Preferably, the tobacco rod 1-1 is a traditional tobacco or reconstituted tobacco sheet base.

[0031] The outer roll connector 1-5 can be either ordinary wrapping paper or tipping paper.

[0032] When packaging a cigarette, the tobacco rod, extraction cone, and smoke delivery tube are first wrapped and connected together via wrapping paper, and then wrapped and connected together with the filter tip via tipping paper.

[0033] The extraction cone and the smoke delivery tube are sealed and connected to each other by bosses and slots machined into the base of the extraction cone and the end face of the smoke delivery tube.

[0034] The ratio of the length of the cone to the length of the smoke delivery tube ranges from 1:3 to 1:6, preferably 1:4. The shape of the smoke extraction cone can be a standard cone or a non-standard cone with a concave or convex surface.

[0035] Example 2 The sealed non-combustion heating cigarette assembly includes a sealed non-combustion heating cigarette and a sealed heating smoking set 2.

[0036] The closed type heated smoking set 2 comprises a heating section 2-1, which comprises a cigarette-receiving cavity 2-1-1 (as shown in Figures 7 and 8).

[0037] A heating element 2-1-2 is disposed on the peripheral sidewalls and / or bottom surface of the cigarette receiving cavity 2-1-1 (as shown in FIG. 7), and when a closed non-combustion heating cigarette is inserted, the tobacco rod is completely enveloped by the circumference of the cigarette receiving cavity.

[0038] The sealed heated smoking set 2 further comprises a cap 2-3, the cap 2-3 and the heating section 2-1 being directly detachably connected to each other or detachably connected to each other via a sealing ring 2-2, and the cap 2-3 is provided with a gradually expanding internal cavity 2-3-1 (as shown in FIG. 7).

[0039] The gradually expanding internal cavity 2-3-1 of the cap 2-3 has a truncated conical shape, the cone apex angle of which is less than 10 degrees, and the end of the cap 2-3 having a smaller inner diameter is directly or indirectly detachably connected to the heating section 2-1.

[0040] The heating section, sealing ring, and cap are coaxial, and the cap is connected to the heating section via threads.

[0041] The sealing ring may be recessed into the heating section via a groove machined into the end face of the heating section.

[0042] The heating method of the heating section is electrical heating.

[0043] Example 3 The use form of the present invention is shown in Figure 1 and Figure 2, and the specific process is as follows: First, remove the cap of the heated smoking set, insert a closed non-combustion heated cigarette, then put back the cap to install and lock, and start heating while the cap is locked. When inhaling, air first enters the space between the cap and the cigarette, and then enters the inside of the smoke delivery tube through the through hole on the smoke delivery tube of the closed non-combustion heated cigarette, and is sprayed on the surface of the extraction cone. Due to the Venturi effect and the Coanda effect, negative pressure is formed in the tapered hole, and positive pressure can be established in the tobacco rod part by heating the tobacco rod, and the existence of the pressure difference and smoke density difference between the positive pressure and the negative pressure can result in the active diffusion of smoke, so that the smoke flows out of the tapered hole and enters the mouth through the internal cavity of the smoke delivery tube and the filter tip.

[0044] The smoke delivery tube has the dual functions of smoke extraction and smoke cooling. The smoking resistance of a cigarette can be adjusted by changing the diameter and position of the through-holes in the wall of the smoke extraction cavity (i.e., the smoke delivery tube) of a closed non-combustion heating cigarette.

Claims

1. A closed non-combustion heat-not-burn cigarette, comprising a tobacco rod (1-1), a hollow smoke extraction cone (1-2), a smoke delivery tube (1-3), a functional filter tip (1-4), and an outer roll connector (1-5); The tobacco rod (1-1), the hollow smoke extraction cone (1-2), the smoke delivery tube (1-3), and the functional filter tip (1-4) are connected in sequence to abut each other and wrapped by the outer roll connecting material (1-5); The circumferential portion and / or the upstream end surface of the tobacco rod (1-1) are wrapped with a paper-based or foil-based material having air impermeability or controllable air permeability to form a sealed structure; said hollow smoke extraction cone (1-2) comprises a cylindrical base (1-2-1) and a tapered cone (1-2-2) with a tapered cavity (1-2-3), said tapered cone (1-2-2) having tapered holes (1-2-2-1) at its top and / or side wall, said tapered holes (1-2-2-1) being at least one in number; The peripheral side wall of the smoke delivery tube (1-3) is provided with at least one through hole (1-3-1) passing through the outer roll connector (1-5), and the axial distance from the through hole (1-3-1) to the bottom surface of the cone is smaller than the axial distance from the tapered hole (1-2-2-1) to the bottom surface of the tapered cone (1-2-2); The closed non-combustion heating cigarette is characterized in that a plug-in sealing structure is disposed between the hollow smoke extraction cone (1-2) and the smoke delivery tube (1-3).

2. The closed non-combustion heated cigarette according to claim 1, characterized in that the tobacco rod (1-1) comprises tobacco pieces, tobacco sheets, tobacco particles, tobacco extrusions, or tobacco-containing gel.

3. The closed type non-combustion heating cigarette according to claim 1, characterized in that the external roll connecting material (1-5) can be any of ordinary wrapping paper, tipping paper, or heat-resistant and air-impermeable thin materials such as polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK) resin, and silica gel.

4. The closed non-combustion heated cigarette of claim 1, wherein the diameter of the through holes in the smoke delivery tube is inversely proportional to the number of the through holes.

5. A closed non-combustion heating cigarette assembly comprising the closed non-combustion heating cigarette according to any one of claims 1 to 4 and a closed non-combustion heating smoking set (2).

6. The closed type non-combustion heating type cigarette assembly according to claim 5, characterized in that the closed type heated smoking set (2) comprises a heating section (2-1), and the heating section (2-1) comprises a cigarette receiving cavity (2-1-1).

7. The sealed non-combustion heated cigarette assembly according to claim 6, characterized in that the sealed heated smoking set (2) further comprises a cap (2-3), the cap (2-3) and the heating section (2-1) are directly detachably connected to each other or detachably connected to each other via a sealing ring (2-2), the cap (2-3) has a gradually expanding internal cavity (2-3-1), the gradually expanding internal cavity (2-3-1) of the cap (2-3) has a truncated cone shape, the cone apex angle of which is less than or equal to 10 degrees, and an end of the cap (2-3) having a small inner diameter is directly or indirectly detachably connected to the heating section (2-1).

8. The closed type non-combustion heating cigarette assembly according to claim 6, characterized in that a heating element (2-1-2) is provided on the peripheral side wall and / or bottom surface of the cigarette accommodating cavity (2-1-1), and when the closed type non-combustion heating cigarette is inserted, the tobacco rod is partially or completely wrapped by the peripheral side wall of the cigarette accommodating cavity.

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