WO2024164132A1 - Multi-section heating-based cartridge structure - Google Patents

Abstract

A multi-section heating-based cartridge structure, comprising a filtering section (100) and a vapor generating section connected to the tail end of the filtering section (100). The vapor generating section at least comprises a first vapor generating section (200) and a second vapor generating section (300) which are sequentially connected in the length direction of the filtering section (100); the first vapor generating section (200) comprises a first cylindrical or columnar e-liquid rolling piece (210) and a first induction metal piece (220) accommodated in the inner cavity of the first e-liquid rolling piece (210); the second vapor generating section (300) comprises a first cylindrical tobacco piece (310) and a second induction metal piece (320) accommodated in the inner cavity of the first tobacco piece (310); the cross section of the first induction metal piece (220) and the cross section of the second induction metal piece (320) are respectively of a V-shaped structure. According to the multi-section heating-based cartridge structure, tobacco and an e-liquid are respectively heated by using multiple sections having different temperatures, and e-liquid vapor and tobacco smoke can be provided for a user at the same time, thereby meeting the requirement of the user for the mixed taste vapor.

Description

A multi-stage heating cigarette cartridge structure Technical Field

The utility model relates to the technical field of electronic cigarettes, and in particular to a multi-stage heating cigarette cartridge structure.

Background Art

Electronic cigarette cartridges refer to tobacco products that are equivalent to cigarettes and are used in conjunction with heat-not-burn electronic cigarettes. They are used to provide the combustion matrix of heat-not-burn electronic cigarettes and the "raw materials" for users to smoke. At present, there are mainly two types of electronic cigarette cartridges on the market, one is a smoke-liquid type cartridge filled with smoke oil, and the other is a tobacco type cartridge filled with solid first tobacco flakes. The former has a rich and strong taste, and the latter tastes closer to real cigarette products. However, due to the different forms of the raw materials to be heated, the product processing routes of the two types of electronic cigarette cartridges are not the same, and the two are unrelated. As a result, a single electronic cigarette cartridge can only provide smoke generated by heating the smoke oil, or only provide smoke generated by heating the tobacco, which is difficult to meet the user's demand for mixed-taste smoke.

Utility Model Content

Based on this, it is necessary to provide a multi-stage heating cartridge structure to address the above shortcomings. The cartridge structure uses multiple stages of different temperatures to heat tobacco and e-liquid respectively, and can provide users with e-liquid smoke and tobacco smoke at the same time, meeting users' needs for mixed flavor smoke.

A multi-stage heated cigarette bomb structure includes a filter section and a smoking section connected to the end of the filter section, the smoking section at least includes a first smoking section and a second smoking section connected in sequence along the length direction of the filter section, the first smoking section includes a cylindrical or columnar first cigarette oil roll sheet and a first induction metal sheet accommodated in the inner cavity of the first cigarette oil roll sheet, the second smoking section includes a cylindrical first tobacco sheet and a second induction metal sheet accommodated in the inner cavity of the first tobacco sheet, the cross-section of the first induction metal sheet and the cross-section of the second induction metal sheet are respectively V-shaped structures.

In one embodiment, the first inductive metal sheet comprises a first fin of a V-shaped structure, the lengths of both sides of the vertex of the first fin are the same, and the angle of the first fin is between 90-150°; the second inductive metal sheet comprises a second fin of a V-shaped structure, the lengths of both sides of the vertex of the second fin are the same, The included angle of the second fin is between 90° and 150°.

In one embodiment, the thickness of the first fin is between 0.05-0.12 mm; the thickness of the second fin is between 0.05-0.12 mm.

In one embodiment, the single side length of the first fin is between 1.6-2.5 mm, and the single side length of the second fin is between 1.6-2.5 mm.

In one embodiment, the length of the first sensing metal sheet is between 12 mm and 18 mm, and the length of the second sensing metal sheet is between 12 mm and 18 mm.

In one embodiment, the included angle of the first fin is different from the included angle of the second fin, or/and the single-side length of the first fin is different from the single-side length of the second fin.

In one embodiment, the geometric center point of the first sensing metal sheet coincides with the geometric center point of the first tobacco oil sheet, and the geometric center point of the second sensing metal sheet coincides with the geometric center point of the first tobacco sheet.

In one embodiment, the length of the first smoking segment is greater than the length of the second smoking segment.

In one embodiment, the length of the first smoking segment is 18 mm and the length of the second smoking segment is 12 mm.

In one embodiment, the smoking segment also includes a third smoking segment connected to an end of the second smoking segment away from the first smoking segment, and the third smoking segment includes a cylindrical or columnar second smoke oil sheet or a second tobacco sheet, and a third sensing metal sheet accommodated in the inner cavity of the second smoke oil sheet or the second tobacco sheet.

The multi-stage heating cigarette cartridge structure of the utility model is implemented, and at least a first smoking section for providing a first cigarette oil rolled sheet and a second smoking section for providing a first tobacco sheet are arranged at the end of the filter section. The first cigarette oil rolled sheet and the first tobacco sheet are heated respectively by the first induction metal sheet and the second induction metal sheet, so that when the cigarette cartridge is used in conjunction with an external electromagnetic induction smoking device, the first cigarette oil rolled sheet and the first tobacco sheet can be heated at the same time, thereby providing the user with a mixed-flavor smoke formed by the smoke generated by tobacco and the smoke generated by the cigarette oil, thereby meeting the user's demand for mixed-taste smoke.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a multi-stage heating cartridge structure in one embodiment of the utility model;

FIG2 is a schematic cross-sectional view of a multi-stage heated cigarette cartridge structure in one embodiment of the present invention;

FIG3 is a schematic structural diagram of a first smoking section in an embodiment of the present utility model;

FIG4 is a schematic structural diagram of a second smoking section in one embodiment of the utility model;

FIG5 is a schematic diagram of circular current magnetic flux lines;

FIG6 is a MATLAB image of the circular current magnetic flux lines generated by a single-turn coil;

FIG7 is a MATLAB image of the circular current magnetic flux lines generated by the 5-turn coil;

FIG8 is a schematic diagram of the difference triangle of the eddy current when the planar induction metal sheet deviates from the origin;

FIG. 9 is a schematic diagram of a difference triangle when the first sensing metal sheet deviates from the origin in one embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

The utility model aims at the problem that traditional electronic cigarette cartridges are restricted by the forms of smoke oil and tobacco and the processing technology of the cigarette cartridges, and a single electronic cigarette cartridge can only provide smoke oil smoke or tobacco smoke, and it is difficult to achieve the fusion and unification of two smokes with different tastes. The utility model provides a cigarette cartridge structure that adopts multi-stage heating and can provide smoke with a mixed taste of smoke oil and tobacco. In addition, the cigarette cartridge structure adjusts the structure of the metal sensor sheet to ensure that the cigarette cartridge structure can achieve uniform heating of the tobacco and smoke oil when used in conjunction with the electromagnetic induction smoking device, thereby avoiding the waste of raw materials caused by insufficient local temperature when the smoke oil and tobacco are heated unevenly, and the generation of scorching and harmful substances caused by excessive local temperature, thereby ensuring the taste effect of the smoke provided by the cigarette cartridge.

Specifically, please refer to Figures 1-4. The multi-stage heated cigarette cartridge structure includes a filter section 100 and a smoke-generating section connected to the end of the filter section 100. The filter section 100 is filled with filter cotton to filter out particulate matter mixed in the smoke; the smoke-generating section is used to provide raw materials for users to smoke smoke. In this embodiment, the cigarette cartridge structure heats up the induction metal sheet set in the smoke-generating section through the electromagnetic induction effect with the external electromagnetic induction smoking device, and then The heat generated by the inductive metal sheet heats the tobacco oil and tobacco to obtain a smoke with a mixed taste of tobacco oil and tobacco. The smoking section at least includes a first smoking section 200 and a second smoking section 300 connected in sequence along the length direction of the filter section 100, the first smoking section 200 includes a cylindrical or columnar first tobacco oil sheet 210 and a first inductive metal sheet 220 accommodated in the inner cavity of the first tobacco oil sheet 210, the second smoking section 300 includes a cylindrical first tobacco sheet 310 and a second inductive metal sheet 320 accommodated in the inner cavity of the first tobacco sheet 310, and the cross-sections of the first inductive metal sheet 220 and the second inductive metal sheet 320 are respectively V-shaped structures.

It should be noted that, in the present embodiment, the first tobacco oil roll sheet 210 is formed by rolling a paper sheet adsorbed with tobacco oil. The first tobacco oil roll sheet 210 formed by rolling can be a cylindrical structure with a hollow middle portion and surrounded by a single layer of paper, or a cylindrical structure with a hollow middle portion and surrounded by multiple layers of paper, or a cylindrical structure formed by winding multiple layers of paper along a vortex line. When the first tobacco oil roll sheet 210 is composed of multiple layers of paper, there is a gap between two adjacent layers of paper so that the tobacco oil on the paper can be fully heated and provide a flow channel for the tobacco oil smoke. The first sensing metal sheet 220 can be inserted in the hollow middle area of the first tobacco oil roll sheet 210 of the cylindrical structure, or can be embedded in the paper of the first tobacco oil roll sheet 210 of the cylindrical structure or the cylindrical structure. Similarly, the first tobacco sheet 310 is obtained by rolling a tobacco sheet formed by pressing tobacco. The first tobacco sheet 310 can be a cylindrical structure obtained by a single-layer tobacco sheet, or a cylindrical structure formed by winding multiple layers of tobacco sheets along the vortex line direction. The second induction metal sheet 320 is clamped at the center of the first tobacco sheet 310, or embedded in the multiple layers of tobacco sheets. When the first tobacco sheet 310 is a multiple-layer tobacco sheet structure, there are gaps between each layer of tobacco sheet so that the tobacco is heated evenly.

The principle of designing the first sensing metal sheet 220 and the second sensing metal sheet 320 as a V-shaped structure in this embodiment is described below.

Electromagnetic induction heating electronic cigarettes are a substitute for tobacco that heats tobacco by making the induction metal sheet heat up through the electromagnetic induction thermal effect between the energized solenoid and the induction metal sheet. Among them, the energized solenoid is a common component, which can generate a magnetic field whose strength can be artificially controlled by changing the current in the coil. In order to describe the magnetic flux lines generated by the energized solenoid, first take an element of the energized solenoid for study, that is, study the magnetic flux lines generated by the current in the circular coil. Specifically, the circular current (the current in the circular coil) is placed in a cylindrical coordinate system for study, and the circular current parameters are given: the radius is R, the constant current is I, the current element position r′＝(R, φ0, 0), the field point position r＝(ρ, φ, z), and the Biot-Savart law shows that:

And because the magnetic vector potential and magnetic induction intensity satisfy:

Then the expression of magnetic vector potential is:

If the current shape is circular, the magnetic vector potential has a component only in the Φ direction, that is, the expression of the magnetic vector potential can be written as:

because but

This is the magnetic vector potential equation for a circular current. Now we use it to solve the equations satisfied by the magnetic flux lines.

Refer to Figure 5. Take a magnetic flux line of the circular current and rotate it around the z axis to form a curved surface composed of a cluster of magnetic flux lines. Then make a plane parallel to the z axis. The plane circle domain sandwiched by the cluster of curves is named Σ, and its radius is ρ. According to the definition of magnetic flux, the number of magnetic fluxes sandwiched by the surface formed by this cluster of curves is a certain value. Using Stokes' theorem, the magnetic flux is:

because, but,

That is, the magnetic flux lines of the circular current satisfy the following equation:

With the help of MATLAB, we can draw the image shown in Figure 6. From Figure 6, we can see that the magnetic induction of the circular current The MATLAB image of the line is consistent with the previous empirical conclusions.

Therefore, for a solenoid with power, it can be considered as a superposition of several circular currents in the linear magnetic medium. FIG7 shows a MATLAB image of the circular current magnetic flux lines generated by a 5-turn coil.

Supplementary parameters pitch u, spiral length l = nu, then the magnetic flux lines of the energized solenoid satisfy the following equation:

The magnetic induction material placed in the magnetic field along the z-axis direction will generate eddy currents in the material due to the change in magnetic vector potential caused by the change in current I. The size of the eddy current is based on the theorem:

In the above formula, σ is the conductivity of the magnetic induction material, f is the power frequency, d is the thickness of the magnetic induction material sheet, and _Bm is the amplitude of the magnetic induction intensity. Among them, _Bm is proportional to the magnetic vector potential.

Therefore, when a rectangular magnetic induction material sheet (planar induction metal sheet) is placed in the circular energized solenoid along the z-axis direction (x=0, y=0), the eddy current generated inside it is induced by various points along its x-axis and y-axis, and the eddy current intensity of all points is proportional to the conductivity of the material, the power frequency, and the distance between the induction point and the physical center of the threaded tube. In this case, if the rectangular magnetic induction material sheet deviates from the origin (x=0, y=0) along the x-axis and y-axis, the eddy current generated inside is compared with the eddy current generated when it is located at the origin, and the difference is proportional to the area of the triangle formed by its two ends and the origin, that is, the difference triangle shown in Figure 8, and the area of the difference triangle is S=2r·m.

In view of this, in this embodiment, the cross-section of the first sensing metal sheet 220 and the cross-section of the second sensing metal sheet 320 are respectively V-shaped structures, so that the eddy current difference caused by the deviation of the origin of each part of the metal sensing sheet is reduced, and the heating effect of the metal sensing sheet is improved, so that each part of the first tobacco oil sheet 210 and the first tobacco sheet 310 is heated evenly. Further, in this embodiment, the first sensing metal sheet 220 extends in the inner cavity of the first tobacco oil sheet 210 along the length direction of the first tobacco oil sheet 210, and the second sensing metal sheet 320 extends in the inner cavity of the first tobacco sheet 310 along the length direction of the first tobacco sheet 310.

In one embodiment, the first sensing metal sheet 220 includes a first fin of a V-shaped structure, and the lengths of the two sides of the vertex of the first fin are the same; the second sensing metal sheet 320 includes a second fin of a V-shaped structure, and the lengths of the two sides of the vertex of the second fin are the same. In other words, the area enclosed by the first sensing metal sheet 220 is equal to the area enclosed by the second sensing metal sheet 320. The area enclosed by the sensing metal sheet 320 is an isosceles triangle. In this way, on the one hand, it is reduced to find the geometric center point of the first sensing metal sheet 220 and the second sensing metal sheet 320 so that it coincides with the origin. On the other hand, it can reduce the problem of the increase in the difference triangle area (r increase) caused by the asymmetry of the two sides of the first sensing metal sheet 220 and the second sensing metal sheet 320, thereby increasing the eddy current difference, so as to minimize the eddy current difference at each location on the first sensing metal sheet 220 and the second sensing metal sheet 320. In this embodiment, the first sensing metal sheet 220 is a rectangular sensing metal sheet that is bent along the middle line, that is, bent along the x-axis and y-axis directions, so that its cross section (i.e., cross section) in the z-axis direction is a V-shaped structure; the second sensing metal sheet 320 is a rectangular sensing metal sheet that is bent along the middle line, that is, bent along the x-axis and y-axis directions, so that its cross section (i.e., cross section) in the z-axis direction is a V-shaped structure. The first sensing metal sheet 220 and the second sensing metal sheet 320 can also be obtained by mold forming.

Further preferably, the geometric center point of the first sensing metal sheet 220 coincides with the geometric center point of the first tobacco oil sheet 210, and the geometric center point of the second sensing metal sheet 320 coincides with the geometric center point of the first tobacco sheet 310, that is, the center of the triangle formed by connecting the two ends of the first sensing metal sheet 220 coincides with the geometric center of the first tobacco oil sheet 210 (that is, the origin referred to above), and the first sensing metal sheet 220 still extends along the z-axis, that is, the length direction of the first tobacco oil sheet 210. In this case, if the geometric center of the first sensing metal sheet 220 also deviates from the origin, combined with Figure 9, when the first sensing metal sheet 220 is at the geometric center of the first oil roll sheet 210, S ₀ =2r ² ·tan(θ), where θ is the angle of the sensing metal sheet; when the first sensing metal sheet 220 is at a non-geometric center of the smoke bomb, S ₁ =2r ² ·tan(θ)+2m·r·sin(θ/2), so the difference ΔS between the two is 2m·r·sin(θ/2). Combined with Figures 8 and 9, the difference triangle of the first sensing metal sheet 220 with a V-shaped structure of this embodiment is only a part of the planar sensing metal sheet (sin(θ/2)＜1). It can be seen that after the first sensing metal sheet 220 is designed as a V-shaped structure, the eddy current difference generated by the deviation from the origin at various locations on the first sensing metal sheet 220 can be significantly reduced. When the first sensing metal sheet 220 is heated, the temperature difference at various locations on it is reduced. The principle of designing the second sensing metal sheet 320 as a V-shaped structure is the same as the principle of designing the first sensing metal sheet 220 as a V-shaped structure. For details, please refer to the aforementioned analysis of the mechanism of coinciding the geometric center point of the first sensing metal sheet 220 with the geometric center point of the first e-liquid roll sheet 210, which will not be repeated here.

In this embodiment, the first sensing metal sheet 220 and the second sensing metal sheet 320 are made of nickel alloy stainless steel. Nickel alloy stainless steel has high resistivity, low resistivity temperature coefficient, good corrosion resistance, and good corrosion resistance. The nickel alloy stainless steel has good oxidation resistance and can be used for a long time at a temperature of 1000-1100°C. The use of the nickel alloy stainless steel ensures that the first induction metal sheet 220 and the second induction metal sheet 320 can quickly perform electromagnetic high-frequency induction heating when generating electromagnetic induction with the smoking device.

In one embodiment, the angle of the first fin is between 90-150°, and the angle of the second fin is between 90-150°. Furthermore, the thickness of the first fin is between 0.05-0.12 mm; the thickness of the second fin is between 0.05-0.12 mm. The length of one side of the first fin (corresponding to the side length r of the circle where the difference triangle is located) is between 1.6-2.5 mm, and the length of one side of the second fin is between 1.6-2.5 mm. The length of the first sensing metal sheet 220 is between 12-18 mm, and the length of the second sensing metal sheet 320 is between 12-18 mm. In this embodiment, the angle θ between the first fin and the second fin is designed to be between 90-150°, which is convenient for processing and can reduce the eddy current difference caused by the deviation of the original rectangular magnetic induction material sheet from the origin by 30-50% (according to the calculation formula of ΔS mentioned above). In this way, the eddy current difference caused by the deviation of different positions on the first induction metal sheet 220 and the second induction metal sheet 320 from the origin is significantly improved, so that the heating temperature of each location on the first induction metal sheet 220 and the second induction metal sheet 320 tends to be consistent, thereby achieving uniform heating of tobacco and tobacco oil.

It can be seen from the above-mentioned difference triangle area calculation formula that ΔS is related to r and θ, that is, the reduction of the eddy current difference is related to the angle of the induction metal sheet and the length of the fin on one side of the induction metal sheet. Therefore, by adjusting the angle of the induction metal sheet and the fin length, the heating temperature of the induction metal sheet can be adjusted. In this embodiment, the angle of the first fin is different from the angle of the second fin, or/and the length of the single side of the first fin is different from the length of the single side of the second fin. In this way, the first induction metal sheet 220 and the second induction metal sheet 320 heat the first smoke oil roll sheet 210 and the first tobacco sheet 310 at different temperatures, respectively, so that the first smoke oil roll sheet 210 and the first tobacco sheet 310 are heated at their respective corresponding optimal temperatures, so that the effective substances in the tobacco and the smoke oil can be released, thereby ensuring the heating effect of the smoke oil and tobacco, and then improving the taste of the mixed smoke.

In addition, in one embodiment, the length of the first smoking segment 200 is greater than the length of the second smoking segment 300. More preferably, the length of the first smoking segment 200 is 18 mm, and the length of the first smoking segment 200 is 12 mm. In this embodiment, by setting the length of the first smoking segment 200 to be greater than the length of the second smoking segment 300, that is, the length of the first tobacco oil sheet 210 is greater than the length of the first tobacco sheet 310, it is beneficial to increase the content of tobacco oil smoke in the mixed smoke, so that the taste of the mixed smoke is stronger.

In one embodiment, the smoking segment further includes a third smoking segment connected to an end of the second smoking segment 300 away from the first smoking segment 200, and the third smoking segment includes a cylindrical or columnar second oil roll sheet or a second tobacco sheet, and a third induction metal sheet contained in the inner cavity of the second oil roll sheet or the second tobacco sheet. In order to meet the different smoking needs of users, the oil on the second oil roll sheet is selected from a different type from the oil on the first oil roll sheet 210, and the tobacco on the second tobacco sheet is selected from a different type of tobacco from the first tobacco sheet 310. Similarly, the angle of the third induction metal sheet and the length of the single fin are different from the angle of the first induction metal sheet 220 and the length of the single fin, and are also different from the angle of the second induction metal sheet 320 and the length of the single fin, so that the smoke cartridge structure provides a smoke with a mixed taste of oil and tobacco when heated, and also includes another type of smoke of oil or tobacco, so as to provide users with a new smoking experience. Of course, according to different needs of users, a fourth smoking segment or even a fifth smoking segment can be provided at the end of the third smoking segment, which will not be described in detail here.

The multi-stage heated cigarette cartridge structure of the utility model is implemented, and at least a first smoking section 200 for providing a first cigarette oil roll sheet 210 and a second smoking section 300 for providing a first tobacco sheet 310 are arranged at the end of the filter section 100. The first cigarette oil roll sheet 210 and the first tobacco sheet 310 are heated respectively by the first induction metal sheet 220 and the second induction metal sheet 320, so that when the cigarette cartridge is used in conjunction with an external electromagnetic induction smoking device, the first cigarette oil roll sheet 210 and the first tobacco sheet 310 can be heated at the same time, thereby providing the user with a mixed-flavor smoke formed by the smoke generated by tobacco and the smoke generated by the cigarette oil, thereby meeting the user's demand for mixed-taste smoke.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims (10)

A multi-stage heated cigarette bomb structure, characterized in that it includes a filter segment and a smoking segment connected to the end of the filter segment, the smoking segment at least includes a first smoking segment and a second smoking segment connected in sequence along the length direction of the filter segment, the first smoking segment includes a cylindrical or columnar first cigarette oil roll sheet and a first induction metal sheet accommodated in the inner cavity of the first cigarette oil roll sheet, the second smoking segment includes a cylindrical first tobacco sheet and a second induction metal sheet accommodated in the inner cavity of the first tobacco sheet, the cross-section of the first induction metal sheet and the cross-section of the second induction metal sheet are respectively V-shaped structures. The multi-stage heated cigarette cartridge structure according to claim 1 is characterized in that the first induction metal sheet comprises a first fin of a V-shaped structure, the lengths of both sides of the vertex of the first fin are the same, and the angle of the first fin is between 90-150°; the second induction metal sheet comprises a second fin of a V-shaped structure, the lengths of both sides of the vertex of the second fin are the same, and the angle of the second fin is between 90-150°. The multi-stage heated cigarette cartridge structure according to claim 2 is characterized in that the thickness of the first fin is between 0.05-0.12 mm; the thickness of the second fin is between 0.05-0.12 mm. The multi-stage heated cigarette cartridge structure according to claim 3 is characterized in that the single-side length of the first fin is between 1.6-2.5 mm, and the single-side length of the second fin is between 1.6-2.5 mm. The multi-stage heated cigarette cartridge structure according to claim 4 is characterized in that the length of the first induction metal sheet is between 12-18 mm, and the length of the second induction metal sheet is between 12-18 mm. The multi-stage heated cigarette cartridge structure according to claim 5 is characterized in that the angle of the first fin is different from the angle of the second fin, or/and the single-side length of the first fin is different from the single-side length of the second fin. The multi-stage heated cigarette cartridge structure according to claim 6 is characterized in that the geometric center point of the first sensing metal sheet coincides with the geometric center point of the first cigarette oil curling sheet, and the geometric center point of the second sensing metal sheet coincides with the geometric center point of the first tobacco sheet. The multi-stage heated cigarette cartridge structure according to claim 1 is characterized in that the length of the first smoking segment is greater than the length of the second smoking segment. The multi-stage heated cigarette cartridge structure according to claim 8 is characterized in that the length of the first smoking segment is 18 mm and the length of the first smoking segment is 12 mm. The multi-stage heated cigarette cartridge structure according to claim 1 is characterized in that the smoke The segment also includes a third smoking segment connected to an end of the second smoking segment away from the first smoking segment, and the third smoking segment includes a cylindrical or columnar second smoke oil sheet or a second tobacco sheet, and a third sensing metal sheet accommodated in the inner cavity of the second smoke oil sheet or the second tobacco sheet.