Heating structure for heating cigarette
By using a cylindrical structure made of metal foil in the heated cigarette, with the central axis coaxially contacting the tobacco and having through holes, the problem of uneven heating is solved, heating uniformity and product consistency are improved, and costs are reduced.
Patent Information
- Application Number
- CN202422997874.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing heated cigarettes suffer from uneven heating and localized overheating, especially in the electromagnetic heating element built into the cigarette cartridge, which leads to a poor consumer experience and increases raw material and process costs.
It adopts a cylindrical structure made of metal foil, with its central axis coaxial with the heated cigarette and its inner and outer sides in contact with the tobacco sheet. The metal foil has regularly arranged through holes, the area of which accounts for 30%-70% of the surface area of the cylindrical structure, in order to achieve uniform heating and heat exchange.
It improves the heating uniformity of heated cigarettes, reduces tobacco temperature unevenness, enhances product consistency and formability, simplifies appliance design, and reduces material and process costs.
Smart Images
Figure CN223653237U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heating cigarette material field, more specifically, especially, a kind of heating structure of heating cigarette. BACKGROUND
[0002] The heating mode in low-temperature cigarette product on market is mainly resistance heating and electromagnetic heating, and the application and development of electromagnetic heating technology are more rapid, and the reason is mainly that the heating body in electromagnetic heating product is generally metal material, and the performance and cost have greater advantage compared with MCH ceramic used in resistance heating technology. As the technical core of product, the structure of electromagnetic heating element mainly includes two forms of built-in appliance and built-in cartridge. The built-in cartridge mode makes the appliance design more simple, and there is no stain residue after suction, easy to clean, and the consumer experience is excellent.
[0003] The built-in cartridge type heating body has multiple structures, such as needle, rod and sheet type, but there are problems of uneven heating, local overheating, etc., and increasing the number of heating bodies will lead to the increase of raw material and process cost. The metal foil distributed in concentric circle with cigarette can effectively increase the heating area, so that the tobacco sheet is heated more uniformly. However, due to the slow heat conduction of tobacco and the inconsistent heat flux density, etc., there is a big difference in the speed of high temperature generated by the heating sheet along the radial direction of the cigarette, which leads to poor heating uniformity inside and outside the concentric foil, and the advantages of concentric circle structure cannot be fully played. SUMMARY
[0004] To solve the above technical problems, the utility model provides a kind of heating structure of heating cigarette, with regular through hole, placed in the tobacco of heating cigarette, and the heating uniformity of heating cigarette is higher.
[0005] The technical scheme provided by the utility model is as follows:
[0006] A kind of heating structure of heating cigarette,
[0007] The heating structure is a cylindrical structure made of metal foil,
[0008] The central axis of the cylindrical structure is coaxial with the heating cigarette, and the inner side and the outer side of the cylindrical structure are in contact with the tobacco sheet.
[0009] Regular through hole is arranged on the metal foil.
[0010] The thickness of the metal foil is 0.01mm-0.1mm.
[0011] The diameter of the cylindrical structure is 15%-50% of the diameter of the heating cigarette.
[0012] The total area of the through hole is 30%-70% of the surface area of the cylindrical structure.
[0013] The length of the cylindrical structure is equal to the length of the heating cigarette cartridge.
[0014] The shape of the through hole is circular, oval, rhombic, quadrilateral other than rhombic, or other regular pattern.
[0015] The arrangement of the through hole is equal arrangement by row, staggered arrangement, or symmetrical arrangement.
[0016] The metal foil material is one of iron, cobalt, and nickel-based alloy or a composite of multiple thereof.
[0017] Compared with the prior art, the heating structure of the heating cigarette of the utility model is a cylindrical structure made of a metal foil, the central axis of the cylindrical structure is coaxial with the heating cigarette, the inner side and the outer side of the cylindrical structure are in contact with tobacco sheet, and the metal foil is regularly arranged with a through hole. The utility model can meet the requirements of the built-in electromagnetic induction heating technology, and can also realize sufficient heat exchange between the inner and outer tobacco sheets of the metal foil through the through hole to achieve the effect of uniform heating. On the other hand, the through hole structure can also reduce the deformation resistance of the foil, improve the formability of the cylindrical structure, and ensure the consistency of the product. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0019] Figure 1 It is a structural schematic view of the cylindrical structure of the utility model.
[0020] Figure 2 It is a sectional view of the heating cigarette cartridge.
[0021] In the figure, the cartridge 1, the cylindrical structure 2, the tobacco sheet 3, and the through hole 4. DETAILED DESCRIPTION
[0022] In order to make the technical scheme of the present application better understood by those skilled in the art, the technical scheme in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0025] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" and "several" is two or more, unless otherwise explicitly specified.
[0026] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.
[0027] The embodiments of the present application are written in a progressive manner.
[0028] A heating structure for heating a cigarette,
[0029] The heating structure is a cylindrical structure 2 made of a metal foil,
[0030] The center axis of the cylindrical structure 2 is coaxial with the heating cigarette, and the inner side and the outer side of the cylindrical structure 2 are in contact with the tobacco sheet 3.
[0031] The metal foil is regularly arranged with through holes 4.
[0032] The metal foil is formed into a cylindrical structure in the rolling process of the heating cigarette, is placed in the inside of the cigarette, the center axis of the cylindrical structure 2 is coaxial with the heating cigarette, that is, the cross section of the cylinder is concentric with the outer circle of the cigarette, the metal foil is in contact with the tobacco, electromagnetic heating, the cylindrical structure 2 rolled by the metal foil conducts heat to the tobacco inside and outside, and the tobacco on the two sides can also conduct heat through the through holes 4 on the metal foil, so that the uneven heating of the tobacco on the two sides can be reduced or eliminated, and the utilization rate of the tobacco sheet 3 is improved.
[0033] The thickness of the metal foil is 0.01mm-0.1mm. When the thickness of the metal foil is 0.01mm, it is close to the limit thickness, and further reducing the size will greatly increase the process cost; when the size is higher than 0.1mm, the material cost will be increased, and under the condition of ultra-high frequency, the skin depth (effective heating thickness) is less than 0.1, so the remaining part of the foil needs to realize temperature conduction in the form of heat conduction, and the heat efficiency will be reduced.
[0034] The diameter of the cylindrical structure 2 is 15%-50% of the diameter of the heating cigarette, and the diameter of the cylindrical structure 2 is too large, so that the heating sheet is too close to the outer wall of the cartridge, and the temperature of the cartridge is too high; the diameter of the cylindrical structure 2 is too small, and the rolling is difficult to form.
[0035] The total area of the through hole 4 is 30%-70% of the surface area of the cylindrical structure 2, and the proportion is too small, which will reduce the heat exchange degree of the inside and outside, and cannot realize the effect of opening hole uniform heating; the proportion is too large, the strength of the metal foil is too low, and the cylindrical structure 2 cannot be formed. The cylindrical structure 2 has large differences in heat conduction speed of the inside and outside tobacco, which causes the problem of uneven heating. The through hole 4 is used for facilitating the heat conduction of the inside and outside tobacco of the cylindrical structure 2, so as to reduce the problem of uneven temperature of the tobacco. When the total area of the through hole 4 is 30%-70% of the surface area of the cylindrical structure 2, the problem of uneven heating caused by the large difference in heat conduction of the inside and outside tobacco of the cylindrical structure 2 can be reduced with the maximum efficiency. In addition, the structure with the through hole can also reduce the deformation resistance of the foil, improve the formability of the cylindrical structure, and ensure the consistency of the product.
[0036] The length of the cylindrical structure 2 is equal to the length of the cartridge 1 of the heating cigarette, in order to further improve the heating efficiency of the cylindrical structure 2 to the cartridge 1 of the heating cigarette, the length of the cylindrical structure 2 is preferably equal to the length of the cartridge 1 of the heating cigarette, so as to maximize the heating power.
[0037] The shape of the through hole 4 is circular, oval, rhombic, quadrilateral except rhombic or other regular figure, the through hole 4 is for the heat conduction of tobacco inside and outside the cylindrical structure 2, the specific shape of the through hole 4 is not limited in the utility model, generally for the convenience of processing, the through hole 4 can be designed into circular, oval, rhombic, arbitrary quadrilateral and regular figure with specific shape.
[0038] In order to further improve the heating uniformity of the cylindrical structure 2, the through holes 4 are uniformly distributed on the cylindrical structure 2, the arrangement mode of the through holes 4 is equidistant arrangement, staggered arrangement or symmetrical arrangement, the through holes 4 can be uniformly dispersed in the inside of the cartridge 1, and the uniformity of the internal temperature of the heated cigarette is improved.
[0039] The metal foil material is one or a plurality of composite of iron, cobalt and nickel-based alloy, and the metal foil material of the utility model can be made of any material capable of realizing electromagnetic heating.
[0040] In order to further illustrate the utility model, specific embodiments are provided below.
[0041] As shown in Figure 1 and Figure 2 The utility model discloses a heating cigarette's heating structure is the cylindrical structure 2 made of metal foil, the center axis of the cylindrical structure 2 is coaxial with heating cigarette, the inside and outside of the cylindrical structure 2 are in contact with tobacco sheet 3, and the metal foil is regularly arranged with through hole 4.
[0042] The metal foil material is 1J85 soft magnetic iron-nickel alloy, the cross section diameter of the cylindrical structure 2 is 5.0mm, the foil thickness is 0.08mm, the shape (projection section) of the through hole 4 is circular, and the circular diameter is 1.0mm. The through hole 4 is uniformly distributed along the axial direction and the circumferential direction of the cartridge 1, wherein the axial hole spacing is 2mm, and the axial rotation angle is 30°. The axial rotation angle refers to the included angle between the vertical line of the center of the adjacent through hole 4 to the cylindrical axis, that is, the number of through holes 4 along one week of the cylindrical structure 2 is equal to (180° / axial rotation angle), if the axial rotation angle is 30°, then the number of through holes 4 along one week of the cylindrical structure 2 is 6.
[0043] As shown in Figure 1The metal foil with regular hole arrangement concentric circle structure shown is formed by the following process: select 0.08mm thickness 1J85 soft magnetic iron nickel alloy foil material with continuous length as raw material (width not less than 30mm), get regular arrangement of circular holes on the metal foil by stamping. The metal foil is cut to obtain 0.08mm thickness 1J85 soft magnetic iron nickel alloy continuous length foil with specific width (calculated by diameter 5.0mm). Put the continuous foil into the tobacco rolling composite device for continuous rolling, finally obtain the heating structure with regular arrangement of through holes 4 of cylindrical structure 2 with cross section shown. Figure 2 The heating structure with regular arrangement of through holes 4 of cylindrical structure 2 with cross section shown.
[0044] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A heating structure for heating a cigarette, characterized in that: the heating structure is a cylindrical structure (2) made of a metal foil, the central axis of the cylindrical structure (2) is coaxial with the heating cigarette, and the inner side and the outer side of the cylindrical structure (2) are in contact with tobacco sheet (3); and the metal foil is regularly arranged with through holes (4).
2. The heating structure for heating a cigarette according to claim 1, characterized in that: the thickness of the metal foil is 0.01mm-0.1mm.
3. The heating structure for heating a cigarette according to claim 1, characterized in that: the diameter of the cylindrical structure (2) is 15%-50% of the diameter of the heating cigarette.
4. The heating structure for heating a cigarette according to claim 1, characterized in that: the total area of the through holes (4) is 30%-70% of the surface area of the cylindrical structure (2).
5. The heating structure for heating a cigarette according to claim 1, characterized in that: the length of the cylindrical structure (2) is equal to the length of the cartridge (1) of the heating cigarette.
6. The heating structure for heating a cigarette according to claim 1, characterized in that: the shape of the through holes (4) is any one of circular, elliptical, rhombic, and quadrilateral other than rhombic.
7. The heating structure for heating a cigarette according to claim 1, characterized in that: the arrangement of the through holes (4) is equal arrangement by rows, staggered arrangement, or symmetrical arrangement.
8. The heating structure for heating a cigarette according to any one of claims 1-7, characterized in that: the metal foil material is one or a plurality of combinations of iron, cobalt, and nickel-based alloys.