CN217722698U

CN217722698U - Cartridge for gas-heated smoking article and smoking article thereof

Info

Publication number: CN217722698U
Application number: CN202221130170.8U
Authority: CN
Inventors: 韩力
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-11-04
Anticipated expiration: 2032-05-12
Also published as: WO2023217144A1

Abstract

The utility model discloses a gas adds hot type smoking article's cigarette bullet and smoking article thereof, include: a housing; a combustion gas inlet at one axial end of the housing; the smoke generating assembly is positioned at the downstream of a combustion gas inlet of the inner cavity of the shell and comprises a gas heat smoke generating column which is formed into a cylinder body provided with a plurality of penetrating heat absorbing channels, and the gas heat smoke generating column absorbs heat of combustion gas through the heat absorbing channels and releases smoke after being heated; a flue gas outlet located at an axially opposite end of the housing downstream of the flue gas generating assembly. The utility model discloses a cigarette bullet body self does not have the heat source, through the configuration of gas-heated smoking post for the material in the post is by abundant, the even heating. The heat inertia of the smoke is reduced, larger smoke quantity can be ensured to be continuously generated, the use feeling of a user is good, and other harmful gases except the smoke can be reduced to the maximum extent.

Description

Cartridge for gas heated smoking article and smoking article thereof

Technical Field

The utility model relates to a smoking article especially relates to a gas adds cigarette bullet of hot type smoking article and smoking article thereof.

Background

Conventional smoking articles, such as cigarettes or cigarettes, are wrapped with cigarette paper around a tobacco rod or rod. Typically, the mouth (smoking end) of a cigarette is also provided with a filter, such as a filter made of cellulose acetate. When a smoker lights the cigarette and performs a suction action, the tobacco filaments in the cigarette are combusted and carbonized to form a glowing combustion zone without flames, and the gradually backward glowing combustion zone generates high-temperature airflow to perform destructive distillation on the adjacent tobacco filaments and evaporate volatile substances in the tobacco filaments to form visible white and light blue smoke under the cooling of the inhaled air. However, decomposition reactions and double decomposition reactions of various chemical substances derived from tobacco during combustion generate a large amount of tar and various harmful substances, and thus enjoying a pleasant feeling of low-harmful nicotine and reducing tar and harmful substances have been a problem to tobacco manufacturers. In order to greatly improve public health environment, reduce tobacco harm and legal conflict caused by the tobacco harm, the related technical improvement and scientific invention improve the situation.

For this reason, various types of electronic cigarettes and electrically heated smoking articles have been developed through a great deal of experimentation and research. In the field of gas-fired heated smoking articles, it is common to include a stationary gas burner mechanism and a replaceable cartridge consumable.

The prior art has had replaceable cartridge consumables for gas-fired smoking articles, which are of a non-combustible type for heating and can reduce various harmful components of conventional cigarettes produced by combustion and thermal cracking of tobacco. The inventor's chinese patents CN210382647U and CN215381479U both aim to provide low tar cigarettes with the advantages of conventional cigarettes to smokers while minimizing incomplete combustion and pyrolysis products. However, there are some technical problems in the prior art that need to be solved more ideally, such as problems related to sufficient heating of the consumable materials of the cartridge, thermal inertia, etc. How to provide good smoking feeling for smokers and realize efficient heating of the cigarette and bomb consumptive materials as far as possible, and meanwhile, the structure is light and the cost is reduced is one of the technical improvement directions which are sought by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

One of the problems to be solved in the utility model is to provide a cigarette bullet suitable for gas heating type smoking article. The smoking product adopting the cigarette bullet has good thermal inertia, sufficient heating, can generate smoke with the taste similar to that of common cigarettes, has good use feeling and lower cost.

The technical scheme of the utility model as follows:

a cartridge for a gas heated smoking article comprising:

a housing;

a combustion gas inlet at one axial end of the housing;

the smoke generating assembly is positioned at the downstream of a combustion gas inlet of the inner cavity of the shell and comprises a gas-heated smoke generating column, the gas-heated smoke generating column is formed into a cylinder body provided with a plurality of heat absorbing channels which penetrate through the cylinder body, the gas-heated smoke generating column absorbs heat of combustion gas through the heat absorbing channels and releases smoke after being heated, the smoke bomb is heated only by utilizing the heat of the combustion gas entering from the combustion gas inlet, and the smoke bomb body does not have a heat source;

a flue gas outlet located at an axially opposite end of the housing downstream of the flue gas generating assembly.

Through giving up gas heat fuming column shaping for the cylinder of seting up a plurality of heat absorption passageways that run through, can absorb combustion gas's heat more effectively and can release the flue gas, need not additionally to set up the heat source in the bullet. Because the exhanst gas outlet of cigarette bullet afterbody is closer to user's mouth, no matter when user's mouth absorbs or when pointing the centre gripping, the position high temperature or uncontrollable at cigarette bullet place all can bring bad impression and experience, adopt the mode of this application to avoid the latent bad impression of taking the heat source in the cigarette bullet.

In addition, in some embodiments, the heat of the combustion gas can be absorbed maximally by arranging a plurality of heat absorption channels therethrough, and at the same time, the passing path of the channels is parallel to the axial direction, so that the blocking feeling is reduced when the user inhales the smoke.

In some embodiments, the plurality of heat absorption channels are a plurality of channels that are uniformly arranged axially in the gas heated plume. By "uniformly arranged" is meant that the plurality of channels are substantially equally spaced from one another. By adopting the arrangement mode, the gas-heated fuming column can absorb heat uniformly and release smoke, the efficiency is improved, and the gas-heated fuming column is suitable for industrial mass production.

In some embodiments, the column of the gas heated plume is a thermally expanding column, and the aperture of at least a portion of the heat absorption channel is reduced or closed when the column of the gas heated plume expands due to heat. When the cylinder is heated and expanded, the orifice of the heat absorption channel is closed, so that combustion gas is favorably retained in the gas heating fuming column for circulation, the heat absorption efficiency is further improved, and the combustion gas is reduced when a user inhales.

In some embodiments, the aerosol-heated smoking article is made of a material comprising tobacco shreds and/or tobacco powder, or tobacco flakes, which are treated by soaking in an inorganic salt.

In some embodiments, the gas heated smoking article comprises a smoking agent, an inorganic salt, a metal heat conductor, and a binder. Wherein the smoking agent is for causing the smoking article to produce an aerosol; the inorganic salt has the functions of absorbing water vapor generated by combustion and retarding flame; the metal heat conductor is used for balancing the heat in the gas-heated smoke column; the adhesive is used for bonding and molding the mixed material of the gas heating smoke column.

In some embodiments, the smoking agent comprises tobacco shreds, tobacco powder, tobacco sheets.

In some embodiments, the smoking agent further comprises propylene glycol. In a particular embodiment, the ratio of tobacco shreds or tobacco powder to propylene glycol by weight is: 1, (0.1-0.3).

In some embodiments, the inorganic salt is sodium chloride or sodium sulfate. In a specific embodiment, the weight ratio of the tobacco shreds or tobacco powder to the inorganic salt is 1 (0.2-0.7).

In some embodiments, the tobacco shreds or powder are pre-soaked with an aqueous solution of sodium chloride, preferably saturated aqueous sodium chloride, and dried for use. The treatment mode can uniformly mix inorganic salt in tobacco shreds or tobacco powder, and the inorganic salt can more conveniently play the roles of flame retardance and water vapor absorption.

In some embodiments, the formulation of the gas-heated plume further includes a bulking agent. Further, the column body is heated and expanded through the expanding agent in the gas heating smoke column.

In some embodiments, the bulking agent is starch xerogel particles, corn particles, rice particles, or seaweed gel particles. In a specific embodiment, the tobacco shred or tobacco powder and the bulking agent are 1 (0.01-0.08) by weight.

In some embodiments, the metal heat conductor in the formation of the gas-heated plume is aluminum foil wire. A small amount of aluminum foil filaments was used to equalize the heat. In a specific embodiment, the weight ratio of the tobacco shreds or the tobacco powder and the metal heat conductor is 1 (0.03-0.1).

In some embodiments, the article of manufacture of the gas heated smoking article further comprises a metal encapsulant. Further, the metal enclosure is formed by wrapping the contents with aluminum foil; when the metal packaging material is heated, the contents are released to form aerosol, so that the aerosol amount is increased, and the taste of the smoking article is improved. Wherein the volume of the metal packaging material is 1-5 cubic millimeters. Preferably, the content is a mixture of nicotine, propylene glycol, glycerol and tobacco flavor. More preferably, the nicotine is 1-2% by weight, the propylene glycol is 98-99% by weight, and the essence is trace.

In some embodiments, the smoke-generating assembly further comprises a moisture-retaining film and/or a heat-insulating film disposed about and wrapping the gas-heated smoking column. Wherein, set up the effect that the moisturizing membrane can realize moisturizing, make vapor wait wherein, and then prevent the tobacco column burning. In some embodiments, the moisturizing film is made of aluminum foil. Further, the heat insulation film is made of quartz fiber paper or expanded polytetrafluoroethylene paper.

In some embodiments, the smoke-generating assembly further comprises a flame barrier upstream of the gas-heated smoking post. The main function of the flame barrier net is to avoid the flame from contacting the gas-heated smoke column to cause the gas-heated smoke column to burn. And reduces the inflow speed of the combustion gas inputted through the combustion gas inlet and divides the combustion gas into a plurality of combustion gas flows to be uniformly directed to the gas hot plume. The combustion gas can be made to pass through the gas heating smoke column more slowly and uniformly as far as possible, and the heat absorption efficiency is increased. Further, the flame barrier mesh is made of stainless steel.

In some embodiments, the smoke generating assembly further comprises a filter element located downstream of the gas-heated smoking cylinder. The harmful substances are captured as much as possible before the smoke is inhaled by the user.

In some embodiments, the filter element is a filter cotton made of polyester fibers.

In some embodiments, the combustion gas inlet is formed by a front end portion of the housing, which is closed in a liquid-tight manner.

In some embodiments, the liquid-tight form: moisture retention film sealing, aluminum foil packaging and silica gel cap packaging.

In some embodiments, the gas-heated smoking article is a cylinder pressed from a tobacco blend material mold.

In some embodiments, the gas-heated tobacco column is a cylinder wound from a tobacco sheet having a plurality of ventilation grooves disposed parallel to an axial direction in a body of the tobacco sheet; the plurality of ventilation grooves form a heat absorption channel with the body of the tobacco sheet when the tobacco sheet is axially wound to form an air-heated plume. The gas-heated fuming column manufactured by the process has higher heat exchange efficiency.

In some embodiments, the gas heated smoking article has a substantially circular cross-section and the heat absorbing channels are distributed in a spiral arrangement for better heat exchange efficiency.

In some embodiments, the gas-heated smoking article has a substantially circular cross-section with the heat-absorbing channels arranged in concentric circular arrays.

The utility model discloses according to the cigarette bullet that above-mentioned scheme obtained, be applicable to in the gas heating formula smoking article. For example, the cigarette cartridge is suitable for a smoking article which is heated by combustion of premixed flame, the flame generated by combustion of premixed air of propane or butane is used for baking and heating the cigarette cartridge at high temperature, the cigarette cartridge body does not have a heat source, hot air flows through a plurality of heat absorption channels of the air heating smoke column, tobacco is uniformly smoked and flue gas which is very similar to the taste of a common cigarette is generated.

In some embodiments, the gas heated smoking article comprises:

a chimney forming a gas heated smoking article body; and

the combustion mechanism is arranged in the inner cavity of the chimney;

wherein the housing of the cartridge is configured such that the cartridge is at least partially inserted into the mouth of the cartridge and removably secured thereto.

In some embodiments, the outer contour of the cartridge housing is smoothly engaged with the outer contour of the cartridge after the cartridge is inserted into the mouthpiece and secured.

In some embodiments, the combustion mechanism combusts propane or butane gas that has been previously mixed with air, and the resulting heat and high temperature carbon dioxide are used to toast the cartridge to produce smoke.

In some embodiments, to prevent the butane premix gas from burning insufficiently, the premix air is burned in an excess amount. Further, the ignition mode is ignition by high-voltage arc, and an arc ignition piece can be used.

Through the technical scheme of the utility model, the heating of cigarette bullet only utilizes the combustion gas's that the combustion gas entry comes in heat, and cigarette bullet body self does not have the heat source, and the structure is more light simple. Through the configuration of the gas-heated smoking column, the material in the column body is fully and uniformly heated, and the tobacco shreds and the tobacco powder in the gas-heated smoking column are not combusted. The heat inertia of the smoke is reduced, larger smoke quantity can be ensured to be continuously generated, the use feeling of a user is good, and other harmful gases except the smoke can be reduced to the maximum extent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the description of the embodiments are briefly introduced below. It should be noted that the drawings are only schematic illustrations shown in the accompanying specification for understanding and reading by persons skilled in the art, and are not intended to limit the technical scope of the invention.

FIG. 1: the structure of the utility model is a schematic diagram of an embodiment of the cigarette bullet;

FIG. 2: the gas heated plume of the cartridge of the present invention is shown in cross-sectionbase:Sub>A-base:Sub>A in the embodiment of figure 3base:Sub>A;

FIG. 3a: the end face structure schematic diagram of an embodiment of the gas-heating smoke column of the smoke bomb of the utility model;

FIG. 3b: the end surface structure schematic diagram of another embodiment of the gas-heating smoke column of the smoke cartridge of the utility model;

FIG. 3c: the end surface structure schematic diagram of another embodiment of the gas-heating smoke column of the smoke cartridge of the utility model;

FIG. 3d: the end surface structure schematic diagram of another embodiment of the gas-heating smoke column of the smoke cartridge of the utility model;

FIG. 4: the structure of an embodiment of the gas heating type smoking article of the utility model is schematic;

FIG. 5 is a schematic view of: the tobacco sheet of another embodiment of the gas-heating smoke column of the smoke bomb of the utility model is a schematic unfolding structure diagram;

FIG. 6: the utility model is a schematic diagram of a tobacco sheet winding structure of another embodiment of the gas-heating smoke column of the smoke cartridge;

FIG. 7: the utility model discloses a structural schematic diagram of another embodiment of gas heat fuming column of cigarette bullet.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings and specific embodiments, which are provided for illustration only and are not intended to limit the scope of the present invention.

It should be noted that the terms "upstream" and "downstream" described in the present invention refer to the direction along which the fluid flows. The term "axial" refers to a direction perpendicular to the "radial" direction, with respect to the axial direction of the smoking article. It is to be noted in particular that the use of the description "axial" does not limit the shape of the smoking article, for example the smoking article may be cylindrical, prismatic, or even asymmetric cylindrical, etc. The term "plurality" means two or more.

The term "tobacco sheet" (tobaco sheet) in the present invention is also called reconstituted tobacco or homogenized tobacco in tobacco industry, and is a sheet product which is prepared from natural tobacco material and has properties close to or superior to those of natural tobacco.

The utility model provides a removable cigarette bullet of gas heating formula smoking articles and smoking articles thereof.

Fig. 1 is a schematic structural view of an embodiment of the cartridge of the present invention. The cartridge includes a cylindrical shell 104. A combustion gas inlet 101 is formed at one axial end of the casing 104. The combustion gas inlet 101 is sealed in a liquid tight manner to enclose the liquid or moisture within the housing. In the embodiment shown in fig. 1, a pre-embedded plastic member 102 is disposed at the inlet. The pre-embedded plastic part 102 and the shell 104 are sealed by a sealing ring 103 to form an inner cavity of the shell 104. In the interior cavity of the housing 104, downstream of the combustion gas inlet 101, a flue gas generating assembly is included. The smoke generating component comprises a flame-proof net 105, a gas heating smoke column 108, a moisture preserving film 107 and a heat insulating film 106 which are wrapped on the periphery of the gas heating smoke column, and a filter element 110 from the upstream to the downstream of the gas flow. At the other axial end of the housing 104, downstream of the flue gas generating assembly, a flue gas outlet 111 of the housing 104 is provided.

The housing 104 may be made of a heat resistant plastic, for example. Alternatively, a double-layer thermal insulation structure may be used. The sealing and moisture-preserving manner of the casing 104 at the combustion gas inlet 1 can also adopt other manners not shown in the drawings of the present invention, besides the example of fig. 1. For example, a moisturizing foil made of a metal material is directly sealed at the combustion gas inlet to realize a moisturizing function). When the ignition device 122 is located upstream of the combustion gas inlet, as shown in fig. 4, the moisture-retaining foil of a metal material may be a soluble metal foil (e.g., tin foil). When the ignition device is located in the internal cavity of the housing (not shown), the combustion gas inlet may optionally be closed with an aluminum foil, which serves to conduct the heat of the combustion flame. In one embodiment, the liquid encapsulation can be implemented by encapsulating the moisture-retaining foil made of metal material outside the pre-embedded plastic part 102 shown in fig. 1, and in the same way, whether the soluble metal foil is used or not can be determined according to the position of the ignition device. In another embodiment, a soft, resilient silicone sealing cap may also be used to achieve a moisture-retaining seal when the ignition device is located within the interior cavity of the housing 104. In another embodiment, a pre-embedded plastic part with a sealing function or other types of pre-embedded parts or plastic parts, or other sealing devices can be directly used without adding the sealing ring 103. The liquid-tight manner can be selected as appropriate depending on the actual position of the ignition device; the ignition device may be an arc ignition blade. These are all ways which are common and well known to the person skilled in the art and therefore will not be further described.

The flame barrier 105, in one embodiment, is a mesh made of stainless steel. The flame barrier 105 prevents the flame from contacting the gas-heated plume to burn the plume. Heat is also conducted to reduce the inflow velocity of the combustion gas inputted through the combustion gas inlet 101 and to divide the combustion gas into a plurality of combustion gas flows to be uniformly directed to the gas plume 108. The combustion gas can pass through the gas-heated smoke column more slowly and uniformly as far as possible, and the heat absorption efficiency is improved.

The moisture retention film 107 is preferably made of aluminum foil or high temperature resistant plastic. The moisture retention film 107 can achieve a moisture retention effect on one hand, so that water vapor is kept in the moisture retention film, and further, the burning of the smoke column is prevented; on the other hand, since one of the components of the gas heated plume includes liquid propylene glycol, the moisture retentive film 107 is provided to prevent liquid permeation and volatilization.

The insulating membrane 106 is made of an insulating material, preferably quartz fiber or high temperature fiberglass paper, and may also be made of expanded polytetrafluoroethylene paper. The heat insulating film may be optional. When the housing 104 itself has a heat insulation function, such as providing a heat insulation layer, or using a heat insulation material or a hollow heat insulation structure, the heat insulation film 106 may be omitted. Of course, even if the housing 104 itself has a thermal insulation effect, a thermal insulation film may be provided, and such an embodiment is also within the scope of the invention.

The filter element 110 is preferably made of filter cotton material made of polyester fiber for capturing harmful substances as much as possible before being inhaled into smoke by a user.

The gas-heated smoking column 108 is formed as a cylinder with a plurality of heat absorbing channels 109 therethrough, and absorbs heat of the combustion gas through the heat absorbing channels, and releases smoke after being heated, and is discharged from a smoke outlet 111 after being filtered by a filter element 110, so as to be inhaled by a user. The gas heated plume 108 is a columnar structure including a plurality of heat absorption channels 109. The heat of the combustion gas can be absorbed more effectively to release the smoke without additionally arranging a heat source in the smoke cartridge. Preferably, the plurality of heat absorption channels are uniformly arranged in the gas heated plume 108. Preferably, the column of the gas heated plume is a thermally expandable column, and when the column of the gas heated plume 108 is thermally expanded, at least a portion of the heat absorption channel 109 is narrowed or closed.

The cross-section of the aerosol-heating smoking article may be of any desired shape for the smoking article. Such as circular, oblate, polygonal, etc. Accordingly, the arrangement and number of heat absorbing channels may also be designed according to the cross section of the gas-heated smoking pillar. In order to improve the thermal inertia of the gas-heated plume, the heat absorption channels can have different diameters and different distribution positions. In the embodiment of fig. 2, 3a, the gas heated plume 208 is pre-formed with a plurality of heat sink channels 209. The heat sink channels 209 are preferably arranged in the manner of fig. 3a, evenly distributed. The embodiment of figure 3b shows the arrangement of the heat absorption channel 309 on the gas heated plume 308. Fig. 3c shows that when the gas heated plume 408 is oval in cross-section, the heat absorption channel 409 can also be designed to be correspondingly oblate. Fig. 3d shows another embodiment of the cross-sectional configuration of the heat absorbing channel 508, wherein the

heat absorbing channels

509A and 509B may take different diameters and arrangements.

In order to improve the heat exchange efficiency and thermal inertia, the heat absorption channel of the gas heating smoke column can also be arranged in a spiral shape. The gas heated smoking post 608 shown in fig. 5 and 6 is wrapped from a tobacco sheet 600 having a plurality of ventilation grooves 601. In one embodiment, the tobacco sheet is impregnated with a saturated aqueous solution of sodium chloride, dried, and then impregnated with a small amount of propylene glycol and wound into a cylindrical shape to be used as an air-heated smoking column. When the tobacco sheet 600 is unfolded, as shown in fig. 5, a plurality of ventilation grooves 601 are uniformly provided to the body 602 of the tobacco sheet in parallel with the axial direction. As shown in fig. 6, the plurality of ventilation grooves 601 form the heat absorbing passage 609 with the body 602 of the tobacco sheet when the tobacco sheet is wound in an axial direction to form the aerosol plume 608. In the example of figure 6, the gas heated smoking post is substantially circular in cross-section and the heat absorbing passageway is arranged in a spiral. The moisture-preserving film 107 and/or the heat-insulating film 106 are wrapped on the outer layer of the wrapped gas-heated smoking column 608, so that the moisture-preserving and heat-insulating effects are achieved on one hand, and the wrapped gas-heated smoking column is tightly wrapped and fixed on the other hand.

Fig. 7 shows the gas heated plume 708 having a circular cross-section with the heat sink passage 709 arranged in concentric circles. The gas heated smoking post 708 is formed by rolling three tobacco sheets (not shown) of different axial lengths having a plurality of ventilation grooves, which, when nested, form a concentric cylindrical structure. In this example, the number of tobacco sheets is not limited to three, nor is the number of concentric cylinders formed therewith limited to three.

The above examples are merely illustrative and are not exhaustive of all embodiments. The shapes of other gas-heated heat generating columns and the arrangement mode of the heat absorbing channel, which are not listed in the present application, also fall into the protection scope of the present invention without departing from the inventive concept. It should be noted that the various embodiments of the gas heated plume described above and below in the following list are applicable to the other examples of components and compositions described in this specification.

In one embodiment, the mixture of materials for the gas heated plume includes a smoke generating agent, inorganic salts, metal heat conductors, and binders. Or the gas-heated smoke column mixed material comprises a smoke agent, inorganic salt, metal heat conductor, adhesive and swelling agent. Alternatively, the gas-heated smoking barrel mixed material comprises a smoking agent, inorganic salt, metal heat conductor, adhesive and metal packaging material. Or the gas-heated smoke column mixed material comprises a smoke agent, inorganic salt, a metal heat conductor, an adhesive, a swelling agent and a metal packaging material. The materials form the mixed material of the gas heating smoke column, and the mixed material is pressed into a cylinder by a mould.

Embodiments of the above-described smoke generating agent, inorganic salt, metal heat conductor, adhesive, swelling agent, and metal package will be described below with reference to specific examples.

The smoking agent is heated to cause the smoking article to generate an aerosol. In one embodiment, the smoking agent comprises tobacco shreds or tobacco powder. Further, the smoke agent also comprises propylene glycol, and the propylene glycol can form smoke after being heated. The liquid propylene glycol and the solid tobacco shreds or tobacco powder are uniformly mixed to form a substantially moist state, and the resulting smoke provides the tobacco with a taste and moisturization characteristic.

The inorganic salt has the functions of absorbing water vapor generated by combustion and retarding flame. The inorganic salt may be selected from sodium chloride, sodium sulfate, and the like.

The metal heat conductor is used for balancing the heat in the gas-heated smoke column. The metal heat conductor can be fragments, strips, filaments and the like made of aluminum foil or other heat conducting metals and is dispersedly mixed in the gas heating smoke column.

The adhesive is used for bonding the mixed materials in the gas heating smoke column, and the cylinder is formed after the mixed materials are pressed by a mould. For example, alcohol-soluble ethylcellulose can be selected as the binder.

The expanding agent is used for enabling the over-gas thermal smoke column to be subjected to thermal expansion, so that the heat absorption channel is reduced or closed. When the cylinder of the gas heating smoke column expands due to heat, at least part of the opening of the heat absorption channel is reduced or closed. When the cylinder body is heated and expanded, the orifice of the heat absorption channel is closed or reduced, so that combustion gas is favorably retained in the gas heating fuming column for circulation, the heat absorption efficiency is further improved, and the suction of a user to the combustion gas is reduced. In some embodiments, the swelling agent is starch xerogel particles, corn particles, rice particles, seaweed gel particles, or the like.

The metal enclosure includes contents (e.g., liquid smoke) which, when the metal enclosure is heated, the outer metal layer ruptures or melts releasing the contents therein and forming an aerosol which increases the amount of aerosol and improves the mouth feel of the smoking article. In one embodiment, the content is a mixture of nicotine, propylene glycol, glycerin, and tobacco flavor. For example, the contents of the metal encapsulation include 1-2% nicotine, 98-99% propylene glycol, and a trace amount of perfume. The metal packaging material adopts an outer layer of metal foil to wrap and package the content of the metal packaging material. The metal foil may be an aluminum foil, a tin foil, a copper foil, a nickel foil, or an alloy foil. During heating of the gas heated smoking cylinder, the contents release smoke liquid as a result of the metal foil cracking or melting. For example, when aluminum foil is used as the metal foil, the contents are burst and released by gas pressure at high temperature. When tin foil is used as the metal foil, the tin foil melts at high temperature to release the contents. The volume of each metal enclosure is 1-5 cubic millimeters.

The patent applications filed by the inventor herein before include Chinese patent application ZL 2016193031/publication No. CN205695718U and International patent application PCT/CN2020/092668, which describe the composition of metal encapsulation (microexplosion microcapsule structure) and its content (smoke solution), and are incorporated herein by reference in their entirety. Any suitable technical means described in the above patent applications can be used for the metal package of the present invention.

By way of example, the component proportion of the mixed material of the gas heating smoke column can be implemented as follows:

in one embodiment, the mixed material of the gas heated plume comprises the following components in proportion: the proportion of tobacco shreds or tobacco powder, inorganic salt and metal heat-conducting substances (such as aluminum foil shreds) by weight is 1: (0.2-0.7): (0.03-0.1), wherein the adhesive is proper.

In one embodiment, the mixed material of the gas heated plume comprises the following components in proportion: the weight ratio of tobacco shreds or tobacco powder, inorganic salt, bulking agent and metal heat-conducting substance (such as aluminum foil shreds) is 1: (0.2-0.7): (0.01-0.08): (0.03-0.1), wherein the adhesive is in proper amount.

In one embodiment, the mixed material of the gas heating smoke column comprises the following components in proportion: the ratio of tobacco shreds or tobacco powder, propylene glycol, inorganic salt and metal heat conductor (such as aluminum foil shreds) is 1: (0.1-0.3): (0.2-0.7) and (0.03-0.1), wherein the adhesive is proper.

In one embodiment, the mixed material of the gas heated plume comprises the following components in proportion: the weight ratio of tobacco shreds or tobacco powder, propylene glycol, inorganic salt, bulking agent and metal heat conductor (such as aluminum foil shreds) is 1: (0.1-0.3): (0.2-0.7): (0.01-0.08): (0.03-0.1), wherein the adhesive is proper.

In one embodiment, the mixed material of the gas heated plume comprises the following components in proportion: the ratio of tobacco shred or tobacco powder, propylene glycol, inorganic salt and metal heat conductor (such as aluminum foil shred) by weight is 1: (0.1-0.3): (0.2-0.7): (0.03-0.1), wherein the adhesive is proper in amount, and the number of the metal packaging objects is several.

In one embodiment, the mixed material of the gas heating smoke column comprises the following components in proportion: the ratio by weight of tobacco thread or tobacco powder, propylene glycol, inorganic salt, bulking agent (e.g. starch xerogel particles) is 1: (0.1-0.3): (0.2-0.7): (0.01-0.08), wherein the adhesive is proper in amount, and the number of the metal packaging objects is several.

In one embodiment, the mixed material of the gas heated plume comprises the following components in proportion: the ratio by weight of tobacco thread or tobacco powder, propylene glycol, inorganic salt, bulking agent (e.g. starch xerogel particles), metal heat conductor (e.g. aluminium foil thread) is 1: (0.1-0.3): (0.2-0.7): (0.01-0.08): (0.03-0.1), wherein a proper amount of adhesive and a plurality of metal packaging materials are arranged.

In one embodiment, the tobacco shreds or powder are pre-soaked with a 25% aqueous solution of an inorganic salt (e.g., aqueous sodium chloride solution) and dried for use. The treatment mode can uniformly mix inorganic salt in tobacco shreds or tobacco powder, and the inorganic salt can more conveniently play the roles of flame retarding and water vapor generation. After the drying step, soaking the tobacco leaves with a small amount of propylene glycol, and pressing the tobacco leaves into gas-heated smoke columns through a die; or the tobacco sheet (with the ventilation groove) is made into a cylindrical shape and then is wound into the cylindrical shape to be used as the gas heating fuming column.

The treatment mode can be applied to the component proportion in any one of the above embodiments, and can be applied to other component proportions which are not mentioned in the specification.

In the above examples, the amount of metal encapsulation is determined comprehensively based on the volume of the gas heated smoking cartridge, the volume of the metal encapsulation, the taste requirements of the smoking article.

Figure 4 shows an example of a gas-fired smoking article comprising a cartridge as claimed by the present invention. The smoking article includes a chimney 121 forming a body of the gas heating type smoking article, and a combustion mechanism 122 provided in an inner cavity of the chimney 121. For example, the combustion mechanism 122 combusts propane or butane gas that has been previously mixed with air, and the resulting heat and high temperature carbon dioxide are used to toast the cartridge to produce smoke. Wherein the cartridge housing 104 is configured such that the cartridge is at least partially inserted into the mouth of the cartridge 121 and removably secured thereto. As shown in figure 4, after the cartridge is inserted into the mouth of the cartridge and secured, the outer profile of the cartridge housing is smoothly engaged with the outer profile of the cartridge. In one embodiment, to prevent the butane premixed gas from burning insufficiently, the premixed air is burnt in an excessive amount. The ignition means may be ignited by a high voltage arc.

When using the gas heated smoking article shown in figure 4, a cartridge is inserted into the cartridge 121 of the smoking article cylinder. Upon pressing of the button 123, the premixed flame burns. In one embodiment, the sealing metal foil at the combustion gas inlet 101 is melted. When a user smokes, a high temperature stream of carbon dioxide combustion gas is drawn into the gas inlet 101, through the flame barrier 105, and into the ventilation channel 109 in the gas heated plume 108. The smoke producing agent (e.g., tobacco powder and propylene glycol, or other formulation of the smoke producing agent mentioned above) is heated to produce smoke, which is drawn into the mouth by the user through the filter element 110 and the air inlet 111.

The cartridge of the present invention may also be suitable for use in a smoking article in the inventor's US10918133B2 patent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical scheme described in the previous embodiments can be modified, or the preparation reaction conditions can be replaced, or part of technical features can be replaced equivalently; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cartridge for a gas heated smoking article, comprising:

a housing (104);

a combustion gas inlet (101) located at one axial end of the casing (104);

a flue gas generating assembly located downstream of the combustion gas inlet (101) within the housing (104), the flue gas generating assembly comprising a photothermal column (108, 608) which is shaped as a cylinder having a plurality of through endothermic channels (109, 509a 509b) 708;

a flue gas outlet (111) located downstream of the flue gas generating assembly at an axially opposite end of the housing (104).

2. A cartridge according to claim 1, characterized in that the plurality of heat absorbing channels (109.

3. A cartridge according to claim 2, wherein the cylinder of the aerothermal plume (108.

4. The cartridge of claim 1, wherein the smoke generating assembly further comprises a moisture preserving film (107) and/or a heat insulating film (106).

5. The cartridge according to claim 1, characterized in that the smoke generating assembly further comprises a flame barrier (105) located upstream of the gas thermal column (108.

6. The cartridge of claim 1, wherein the gas heated plume (108.

7. The cartridge of claim 1, wherein the aerothermic plume (608, 708) is a column wrapped with a tobacco sheet (600) having a plurality of ventilation grooves (601), the plurality of ventilation grooves (601) being disposed in the body of the tobacco sheet parallel to the axial direction of the tobacco sheet, the plurality of ventilation grooves (601) forming with the body of the tobacco sheet the heat absorption channel (609.

8. A gas heated smoking article comprising a cartridge according to any one of claims 1 to 7.

9. A gas heated smoking article according to claim 8, comprising:

a chimney (121) forming the gas heated smoking article body; and a combustion mechanism (122) disposed in the chimney cavity; wherein the housing (104) of the cartridge is configured such that the cartridge is at least partially inserted into the mouth of the cartridge (121) and removably secured thereto.