A hermetically sealed heated cigarette

Abstract

The present invention belongs to the field of heat-not-burn cigarettes, and particularly relates to an airtight heated cigarette. The cigarette includes, from upstream to downstream, a tobacco section (1), a low draw resistance section (2), and a functional filter section (3) that are coaxially abutted in sequence, and an outer wrapper (4) is wrapped around the cigarette; the low draw resistance section (2) is a tube body having an axial central cavity (2-1) and circumferential side wall through holes (2-2), and the number of the side wall through holes (2-2) is at least one; the circumference and / or upstream end face of the tobacco section (1) is wrapped by a paper-based or foil-based material with airtight or controllable air permeability to form an airtight system. The present invention designs an airtight cigarette for the first time. Since the fresh flue gas formed has a replacement effect on the internal atmosphere of the cigarette, the oxygen content in the cigarette will decrease during the heating process, and even if the temperature is increased, combustion will not occur. Therefore, the heating temperature can be increased to fully release the tobacco aroma components and increase the flue gas volume.

Description

Technical Field

[0001] The present invention belongs to the field of heat-not-burn cigarettes, and particularly relates to a hermetically heated cigarette. Background Art

[0002] Traditional tobacco has a history of hundreds of years and has been integrated into the lives of most smokers. In recent years, with the improvement of people's living standards, issues such as smoking and health, and the harm of second-hand smoke have attracted more and more attention, and the harmfulness of traditional tobacco products has become increasingly prominent. At the same time, with the implementation of the WHO Framework Convention on Tobacco Control, especially the gradual expansion of the scope of smoking bans in public places around the world, the development environment of tobacco products has undergone major and profound changes, and the structure of tobacco products is accelerating towards diversification and smokelessness. New tobacco products have gradually become a realistic choice for major multinational tobacco companies to cope with the declining sales of traditional tobacco products.

[0003] At present, the vast majority of heat-not-burn cigarettes use air as the carrier of the smoke. In order to ensure that the tobacco does not burn, the heating temperature applied is usually relatively low, generally not exceeding 300°C. Compared with traditional cigarettes, the tobacco flavor components of new heat-not-burn cigarettes are difficult to be completely released, and the amount of smoke is insufficient. Therefore, it is difficult for such cigarettes to be accepted by traditional smokers. In addition, in order to ensure air circulation, the tobacco ends of the vast majority of heat-not-burn cigarettes are of an open structure, that is, the cut tobacco or reconstituted tobacco sheets are directly exposed, or are connected to the outside atmosphere through a certain air flow channel. During the process of pulling out the cartridge after smoking, tobacco residues will fall off, which is likely to contaminate the smoking device. Therefore, this type of tobacco needs to spend time cleaning the smoking device after being used for a period of time.

[0004] In order to solve the above problems, the present invention is proposed. Summary of the Invention

[0005] The present invention provides a hermetically heated cigarette, which includes a tobacco section 1, a low draw resistance section 2, and a functional filter section 3 that are coaxially abutted in sequence from upstream to downstream, and an outer wrapper 4 is wrapped outside the cigarette;

[0006] Wherein, the low draw resistance section 2 is a tube body having an axial central cavity 2-1 and circumferential side wall through holes 2-2, and the number of the side wall through holes 2-2 is at least one;

[0007] The circumference and / or upstream end face of the tobacco section 1 is wrapped by a paper-based or foil-based material with airtight or controllable air permeability to form an airtight system.

[0008] Preferably, a coaxial through hole 4-1 is provided at a position corresponding to the side wall through hole 2-2 on the outer wrapper 4, and the aperture of the coaxial through hole 4-1 is not less than the aperture of the side wall through hole 3-2.

[0009] Preferably, the low draw resistance section 2 can be an empty tube.

[0010] Preferably, the functional filter section 3 includes a temperature reduction section 3-1 and a filtering section 3-2.

[0011] Preferably, the tobacco section 1 includes cut tobacco, tobacco flakes, tobacco granules, tobacco formed bodies, or tobacco-containing gels.

[0012] The above technical solutions can be freely combined on the premise of no contradiction.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention designs a closed cigarette for the first time, which is used in combination with a heating type smoking device. Since the fresh smoke formed has a displacement effect on the internal atmosphere of the cigarette, the oxygen content in the cigarette will decrease during the heating process. At this time, even if the heating temperature is increased, no combustion phenomenon will occur. Therefore, the heating temperature can be increased to fully release the tobacco aroma components and increase the smoke volume.

[0015] 2. One end of the tobacco section of the closed cigarette in contact with the cigarette receiving cavity is closed, so that the situation of tobacco residues falling and polluting the smoking device will not occur.

[0016] 3. The closed cigarette of the present invention is designed with a low draw resistance section having an axial central cavity and circumferential side wall through holes. During the suction process, external air enters from the side wall through holes, mixes with the smoke generated by heating the tobacco section in the cavity to form the mainstream smoke for people to inhale. At the same time, during the suction process, external air enters from the side wall through holes, the air flow rate in the low draw resistance section is relatively high, and the pressure is relatively low, which has an extraction effect on the smoke of the tobacco section. In addition, the external air has a temperature reduction effect on the smoke. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a closed heating type cigarette according to Embodiment 1 of the present invention.

[0018] List of Reference Numerals:

[0019] 1. Tobacco section, 2. Low draw resistance section, 2-1. Central cavity, 2-2. Side wall through hole, 3. Functional filter section, 4. External wrapper, 4-1. Coaxial through hole. Detailed Embodiments

[0020] The content of the present invention will be further described below through specific embodiments.

[0021] Embodiment 1

[0022] A hermetically sealed heated cigarette, the cigarette includes a tobacco section 1, a low draw resistance section 2, and a functional filter section 3 that are coaxially abutted in sequence from upstream to downstream, and an outer wrapper 4 tipping paper is wrapped around the cigarette;

[0023] Wherein, the low draw resistance section 2 is a hollow paper tube having an axial central cavity 2-1 and circumferential side wall through holes 2-2, and the number of the side wall through holes 2-2 is 2;

[0024] The circumference and the upstream end face of the tobacco section 1 are wrapped by an airtight aluminum foil to form a hermetic system.

[0025] Coaxial through holes 4-1 are provided at positions corresponding to the side wall through holes 2-2 on the outer wrapper 4, and the aperture of the coaxial through holes 4-1 is not less than the aperture of the side wall through holes 3-2.

[0026] The functional filter section 3 includes a temperature reduction section 3-1 and a filtering section 3-2.

[0027] The tobacco section 1 includes a tobacco formed body.

[0028] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hermetically heated cigarette, characterized in that, the cigarette from upstream to downstream includes a tobacco section (1), a low draw resistance section (2), and a functional filter section (3) that are coaxially abutted in sequence, and the outside of the cigarette is wrapped with an outer wrapper (4); wherein, the low draw resistance section (2) is a tube body having an axial central cavity (2-1) and circumferential side wall through holes (2-2), and the number of the side wall through holes (2-2) is at least one; the circumference and the upstream end face of the tobacco section (1) are wrapped by an airtight paper-based or foil-based material to form an airtight system; a coaxial through hole (4-1) is provided at a position corresponding to the side wall through hole (2-2) on the outer wrapper (4), and the aperture of the coaxial through hole (4-1) is not less than the aperture of the side wall through hole (2-2); the low draw resistance section (2) is an empty tube; the functional filter section (3) includes a temperature reduction section (3-1) and a filtering section (3-2).

2. The cigarette according to claim 1, characterized in that, the tobacco section (1) includes cut tobacco, tobacco flakes, tobacco particles, tobacco formed bodies or tobacco-containing gels.

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