Heating assembly and aerosol-generating device

Abstract

The utility model discloses a heating assembly, comprising a first heating track comprising a plurality of first convex parts and a plurality of first concave parts, the first convex parts and the first concave parts sequentially form a first high-temperature heating zone and a first low-temperature heating zone along a first direction, and the heating assembly is provided with a first end and a second end which are opposite to each other along an axial direction, the first direction is the direction from the first end to the second end of the heating assembly; the second heating track comprises a plurality of second convex parts and a plurality of second concave parts, and the second convex parts and the second concave parts sequentially form a second high-temperature heating area and a second low-temperature heating area in the first direction; the first convex part is matched with the second concave part, and the first concave part is matched with the second convex part, so that the first high-temperature heating area and the second low-temperature heating area are crossed along the circumferential direction, and the first low-temperature heating area and the second high-temperature heating area are crossed along the circumferential direction. By the adoption of the technical scheme, segmented heating is achieved, the aerosol volatilization time is long, and aerosol release is consistent. The utility model further discloses an aerosol generating device.

Description

Technical Field

[0001] The utility model relates to the technical field of new tobacco products, and particularly relates to a heating component, an aerosol generating device and a control method for the heating component. Background Art

[0002] In a heat-not-burn cigarette stick, when the cigarette stick is long, a relatively high heating energy is required to synchronously heat the whole cigarette stick. At the same heating energy, the longer the length of the cigarette stick, the smaller the energy obtained per unit length of the cigarette stick, resulting in insufficient atomization and small smoke volume.

[0003] In the prior art, the patent with the authorization announcement number CN103763953B discloses a heater, which includes a plurality of independently controllable heating zones and can independently heat different parts of the drawable material. However, a plurality of independently controllable heating zones will lead to complex structure and circuit design of the heater, increasing the cost. In addition, a plurality of independent heating zones means an increase in the number of components, and each component has a potential failure risk, reducing the reliability of the whole device. The control of a plurality of independent heating zones also requires more precise algorithms and sensors, increasing the control difficulty and prone to control errors, affecting the heating effect. There may also be uneven heat distribution in a plurality of independent heating zones, resulting in too high or too low temperature in some areas, affecting the heating effect and poor consistency of aerosol release. Heat loss may also occur at the edges of adjacent heating zones, reducing the heating efficiency.

[0004] There is also prior art that divides the heater into different heating zones to achieve segmented heating, and different heating zones are arranged side by side. However, this method will result in uneven heat distribution when the heater heats different positions of the cigarette stick, and some areas cannot be fully heated, with poor consistency of aerosol release and affecting the smoking taste. Summary of the Utility Model

[0005] The utility model provides a heating component to solve the problems of uneven heat distribution in different heating zones, possible heat loss, low heating efficiency and poor consistency of aerosol release during segmented heating in the prior art.

[0006] In a first aspect, an embodiment of the utility model discloses a heating component, which is characterized by including:

[0007] A first heating track, including a plurality of first convex parts and a plurality of first concave parts, the first convex parts extend circumferentially and are axially spaced apart, a first concave part is formed between adjacent first convex parts, and the first convex parts and the first concave parts sequentially form a first high-temperature heating zone and a first low-temperature heating zone in a first direction. The heating component has a first end and a second end that are axially opposite, and the first direction is the direction from the first end of the heating component to the second end along the axis;

[0008] A second heating track, including a plurality of second convex portions and a plurality of second concave portions, the second convex portions extending circumferentially and being axially spaced apart, second concave portions being formed between adjacent second convex portions, the second convex portions and the second concave portions sequentially forming a second low-temperature heating zone and a second high-temperature heating zone in a first direction;

[0009] The first heating track and the second heating track are circumferentially distributed, the first convex portion cooperating with the second concave portion, and the first concave portion cooperating with the second convex portion, such that the first high-temperature heating zone and the second low-temperature heating zone cross each other circumferentially, and the first low-temperature heating zone and the second high-temperature heating zone cross each other circumferentially.

[0010] With the above technical solution, the heating component of the present utility model can achieve segmented heating through the high-temperature heating zones and low-temperature heating zones of the first heating track and the second heating track respectively, and the high-temperature part of the first heating track intersects with the low-temperature part of the second heating track, and the low-temperature part of the first heating track intersects with the high-temperature part of the second heating track. When performing segmented heating, it is beneficial to gradually heat each part of the aerosol-generating article, fully heat the aerosol-generating article, extend the aerosol volatilization time, ensure the consistency of aerosol release, and improve the taste.

[0011] According to another specific embodiment of the present utility model, the heating component further includes a tubular heating base body, and the first heating track and the second heating track surround the tubular heating base body along the circumferential direction of the tubular heating base body; the first heating track and the second heating track are provided on the inner wall of the tubular heating base body, or the first heating track and the second heating track are provided on the outer peripheral wall of the tubular heating base body.

[0012] According to another specific embodiment of the present utility model, the first heating track and the second heating track are in a comb shape or a serrated shape, the first heating track is integrally bent to form, and / or the second heating track is integrally bent to form.

[0013] According to another specific embodiment of the present utility model, both the first convex portion and the second convex portion are sheet-shaped, and both the first convex portion and the second convex portion have slits extending circumferentially.

[0014] According to another specific embodiment of the present utility model, the resistance of the first convex portion located in the first high-temperature heating zone is higher than the resistance of the first convex portion located in the first low-temperature heating zone, and the resistance of the second convex portion located in the second high-temperature heating zone is higher than the resistance of the second convex portion located in the second low-temperature heating zone.

[0015] According to another specific embodiment of the present utility model, the resistance of the first convex portion located in the first high-temperature heating zone is equal to the resistance of the second convex portion located in the second high-temperature heating zone, and the resistance of the first convex portion located in the first low-temperature heating zone is equal to the resistance of the second convex portion located in the second low-temperature heating zone.

[0016] According to another specific embodiment of the present utility model, the resistivity of the first convex portion located in the first high-temperature heating zone is higher than that of the first convex portion located in the first low-temperature heating zone, and the resistivity of the second convex portion located in the second high-temperature heating zone is higher than that of the second convex portion located in the second low-temperature heating zone.

[0017] According to another specific embodiment of the present utility model, the first convex portion located in the first high-temperature heating zone has a first high-temperature cross-section, and the first convex portion located in the first low-temperature heating zone has a first low-temperature cross-section. Both the first high-temperature cross-section and the first low-temperature cross-section are cross-sections perpendicular to the direction of current flowing through the first convex portion, and the area of the first high-temperature cross-section is smaller than the area of the first low-temperature cross-section; the second convex portion located in the second high-temperature heating zone has a second high-temperature cross-section, and the second convex portion located in the second low-temperature heating zone has a second low-temperature cross-section. Both the second high-temperature cross-section and the second low-temperature cross-section are cross-sections perpendicular to the direction of current flowing through the second convex portion, and the area of the second high-temperature cross-section is smaller than the area of the second low-temperature cross-section.

[0018] According to another specific embodiment of the present utility model, the first heating track has a first starting end and a first ending end, and the second heating track has a second starting end and a second ending end. The first starting end, the first ending end, the second starting end, and the second ending end are all located at the second end of the heating component, and the second end is the end far from the mouthpiece.

[0019] According to another specific embodiment of the present utility model, the first heating track has a first starting end and a first ending end, and the second heating track has a second starting end and a second ending end. The first starting end is connected to one of the circuit positive electrode and the circuit negative electrode, and the first ending end is connected to the other of the circuit positive electrode and the circuit negative electrode; the second starting end is connected to one of the circuit positive electrode and the circuit negative electrode, and the second ending end is connected to the other of the circuit positive electrode and the circuit negative electrode; the first heating track and the second heating track share the same circuit positive electrode or circuit negative electrode.

[0020] According to another specific embodiment of the present utility model, the first heating track has a first starting end and a first ending end, and the second heating track has a second starting end and a second ending end. The first starting end is independently connected to one of the circuit positive electrode and the circuit negative electrode, and the first ending end is independently connected to the other of the circuit positive electrode and the circuit negative electrode; the second starting end is independently connected to one of the circuit positive electrode and the circuit negative electrode, and the second ending end is independently connected to the other of the circuit positive electrode and the circuit negative electrode.

[0021] In a second aspect, an embodiment of the present utility model discloses an aerosol generating device, including the heating component described in any one of the foregoing items.

[0022] With the above technical solution, the heating component of the aerosol generating device of the present utility model can achieve segmented heating through the high-temperature heating zones and low-temperature heating zones of the first heating track and the second heating track respectively. Moreover, the high-temperature part of the first heating track intersects with the low-temperature part of the second heating track, and the low-temperature part of the first heating track intersects with the high-temperature part of the second heating track. During segmented heating, it is beneficial to gradually heat each part of the aerosol generating article, fully heat the aerosol generating article, extend the aerosol volatilization time, ensure the consistency of aerosol release, and improve the taste. Description of the Drawings

[0023] Figure 1 Showing a three-dimensional structure diagram of the heating component before and after disassembly in an embodiment of the present utility model;

[0024] Figure 2a Showing a three-dimensional structure diagram of the heating component after unfolding in an embodiment of the present utility model;

[0025] Figure 2b Showing a three-dimensional structure diagram of the heating component before unfolding in an embodiment of the present utility model;

[0026] Figure 3 Showing a three-dimensional structure diagram of the heating component before and after disassembly in another embodiment of the present utility model;

[0027] Figure 4a Showing a three-dimensional structure diagram of the heating component after unfolding in another embodiment of the present utility model;

[0028] Figure 4b Showing a three-dimensional structure diagram of the heating component before unfolding in another embodiment of the present utility model;

[0029] Figure 5 Showing a three-dimensional structure diagram of the heating component with four wires in an embodiment of the present utility model;

[0030] Figure 6 Showing a three-dimensional structure diagram of the heating component with four wires in another embodiment of the present utility model;

[0031] Figure 7 Showing a curve of the relationship between voltage and time when the heating component in an embodiment of the present utility model is heating Figure 1 ;

[0032] Figure 8 Showing the second curve graph of the relationship between voltage and time when the heating component in an embodiment of the present utility model is heating;

[0033] Figure 9 Showing a comparison graph of the temperature curves of a conventional heating track and an interleaved heating track.

[0034] (Symbol Explanation)

[0035] Heating component 1; first end 011; second end 012; first heating track 11; second heating track 12; tubular heating substrate 13; first high-temperature heating zone A1; first low-temperature heating zone a1; first convex portion 113; first concave portion 114; second high-temperature heating zone B1; second low-temperature heating zone b1; second convex portion 123; second concave portion 124; air flow downstream end 101; air flow upstream end 102; heating component 2; first end 021; second end 022; first heating track 21; second heating track 22; tubular heating substrate 23; first high-temperature heating zone A2; first low-temperature heating zone a2; first convex portion 213; first concave portion 214; second high-temperature heating zone B2; second low-temperature heating zone b2; second convex portion 223; second concave portion 224; first high-temperature cross-section S1; first low-temperature cross-section s1; second high-temperature cross-section S2; second low-temperature cross-section s2; first wire 01; second wire 02; third wire 03; fourth wire 04; first direction x; axial direction y; circumferential direction z Detailed implementation manners

[0036] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0039] The term "aerosol-generating article" includes materials that can provide volatile components when heated, and can include any tobacco-containing materials, such as can include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. An "aerosol-generating article" can also include other non-tobacco products, which may or may not contain nicotine.

[0040] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0041] After careful study of the prior art, the inventors found that when the aerosol generating article is heated in sections in the prior art, there may be a problem of uneven heat distribution between multiple independent heating zones, and heat dissipation may occur at the edges of adjacent heating zones, affecting the heating efficiency and resulting in poor aerosol release consistency. The inventors expect to improve the heater for sectional heating in the prior art to solve the above problems. The inventors further thought that the above problems can be solved by improving the heating trajectory distribution and heat distribution of the heating component.

[0042] In a first aspect, with reference to Figure 1 and in combination with Figure 2a and Figure 2b , an embodiment of the present invention discloses a heating assembly 1, and the heating assembly 1 includes a first heating trajectory 11 and a second heating trajectory 12. Among them, Figure 1 shows the heating assembly 1 before and after disassembly. Figure 1 On the left are the disassembled first heating trajectory 11, second heating trajectory 12, and tubular heating substrate 13, and the combination of the three forms Figure 1 the heating assembly 1 shown on the right. For ease of observation, Figure 2a shows a schematic diagram of the heating trajectory in the heating assembly 1 after being unfolded, Figure 2b which is a schematic diagram before the heating trajectory is unfolded.

[0043] The first heating trajectory 11 has a plurality of first convex portions 113 and a plurality of first concave portions 114. The first convex portions 113 extend along the circumferential direction z and are spaced apart along the axial direction y. A first concave portion 114 is formed between two adjacent first convex portions 113. The first convex portions 113 and the first concave portions 114 sequentially form a first high-temperature heating zone A1 and a first low-temperature heating zone a1 along the first direction x.

[0044] Among them, the heating assembly 1 has a first end 011 and a second end 012 that are opposite to each other along the axial direction y, and the first direction x is the direction from the first end 011 to the second end 012 of the heating assembly 1 along the axial direction y.

[0045] The second heating trajectory 12 has a plurality of second convex portions 123 and a plurality of second concave portions 124. The second convex portions 123 extend along the circumferential direction z and are spaced apart along the axial direction y. A second concave portion 124 is formed between two adjacent second convex portions 123. The second convex portions 123 and the second concave portions 124 sequentially form a second low-temperature heating zone b1 and a second high-temperature heating zone B1 along the first direction x.

[0046] The first heating track 11 and the second heating track 12 are circumferentially distributed along the z-axis, and the first convex portion 113 cooperates with the second concave portion 124, and the first concave portion 114 cooperates with the second convex portion 123, so that the first high-temperature heating zone A1 and the second low-temperature heating zone b1 cross each other along the z-axis, and the first low-temperature heating zone a1 and the second high-temperature heating zone B1 cross each other along the z-axis.

[0047] With the above technical solution, by arranging the high-temperature heating zones and the low-temperature heating zones of different heating tracks in an interleaved manner, a differential distribution of high-temperature zones and low-temperature zones is formed in terms of the heat generation amount of each heating track in the axial direction. At this time, when heating the aerosol-generating article, multi-level temperature control can be achieved. During segmented heating, it is beneficial to gradually heat each part of the aerosol-generating article, fully heat the aerosol-generating article, extend the aerosol volatilization time, ensure the consistency of aerosol release, and improve the taste.

[0048] More specifically, the first heating track 11 and the second heating track 12 are not simply arranged in segments in the first direction x, but are arranged in an interleaved manner, with spaced distribution filling the blank areas of each other. The first heating track 11 and the second heating track 12 run through the entire axial direction y of the heating component 1 to form a complete heating track. The first heating track 11 and the second heating track 12 each exhibit a comb-like or serrated shape. Using a heating track of this shape is beneficial to improving the utilization rate of space and can avoid the problem of uneven heat concentration caused by too much proportion of blank areas. In this embodiment, the first heating track 11 and the second heating track 12 are each formed by straight-line bending. In other embodiments, the first convex portion 113 and the second convex portion 123 can also exhibit a trajectory formed by wavy bending.

[0049] Furthermore, the heating component 1 further includes a tubular heating substrate 13, and the first heating track 11 and the second heating track 12 surround the tubular heating substrate 13 along the circumferential direction z of the tubular heating substrate 13. In this way, the two heating tracks can comprehensively surround the entire tubular heating substrate 13, enabling each part of the tubular heating substrate 13 to be heated, and heating the aerosol-generating article more fully. The first heating track 11 and the second heating track 12 can both be provided on the inner wall of the tubular heating substrate 13 or on the outer peripheral wall of the tubular heating substrate 13. The heating component 1 can be applied to both external heating and internal heating. When the heating component 1 is applied to external heating, the overall size of the heating component is larger, which is convenient for arranging the first heating track 11 and the second heating track 12 on the tubular heating substrate 13.

[0050] Furthermore, the first heating track 11 is formed by winding in one piece, and the second heating track 12 can also be formed by winding in one piece. That is, the first heating track 11 and the second heating track 12 are both continuous and uninterrupted. This arrangement can not only make the continuous and unsegmented different heating tracks achieve the effect of segmented heating, but also reduce the number of electrode welding points and nodes, which is easy to manufacture.

[0051] Furthermore, in other embodiments, the first heating track 11 and the second heating track 12 may be intermittent (not shown in the figure). A power supply wire is added between the first high temperature heating zone and the first low temperature heating zone of the first heating track 11, so that the first heating track 11 can be further divided into a first high temperature heating track and a first low temperature heating track that are independently controlled from each other. A power supply wire is also added between the second high temperature heating zone and the second low temperature heating zone of the second heating track 12, so that the second heating track 12 is further divided into a second high temperature heating track and a second low temperature heating track that are independently controlled from each other. When using the first heating track 11 and the second heating track 12 for heating, the voltages of the first high temperature heating track, the first low temperature heating track, the second high temperature heating track and the second low temperature heating track can be independently controlled according to the requirements of the atomization amount of different heating areas to control the amount of heat generated by different heating tracks. In addition, the first high temperature heating track and the first low temperature heating track can also be heated or cooled independently of each other, without having to heat up or cool down at the same time; the second high temperature heating track and the second low temperature heating track can also be heated or cooled independently of each other, without having to heat up or cool down at the same time, as long as the calorific value of the area where the first high temperature heating track and the second low temperature heating track are located is different from the calorific value of the area where the second high temperature heating track and the first low temperature heating track are located, so as to achieve a temperature difference and realize segmented heating. By adopting the above-mentioned technical solution that the first high temperature heating track, the first low temperature heating track, the second high temperature heating track and the second low temperature heating track are independently controlled to heat in segments, the calorific value of different tracks can be independently adjusted. For example, when the first heating track 11 is working, the second high temperature heating track or the second low temperature heating track of the second heating track 12 is independently opened to further increase the calorific value of a specific section, thereby providing more sufficient aerosol and improving the smoking taste.

[0052] Further, both the first convex portion 113 and the second convex portion 123 are sheet-shaped. The first heating track 11 and the second heating track 12 are both formed by printing metal paste on the tubular heating substrate 13. The sheet-shaped first convex portion 113 and the second convex portion 123 are convenient for manufacturing. Both the first convex portion 113 and the second convex portion 123 have slits extending in the circumferential direction z. Setting the first convex portion 113 and the second convex portion 123 in this hollow form instead of a solid form is beneficial for allowing current to pass through the entire first convex portion 113 and the entire second convex portion 123, so that the entire first convex portion 113 and the entire second convex portion 123 can generate heat, which is beneficial for fully and comprehensively heating the atomizable substance.

[0053] Further, the resistance of the first convex portion 113 located in the first high-temperature heating zone A1 is higher than the resistance of the first convex portion 113 located in the first low-temperature heating zone a1, and the resistance of the second convex portion 123 located in the second high-temperature heating zone B1 is higher than the resistance of the second convex portion 123 located in the second low-temperature heating zone b1.

[0054] When the heating assembly is actually working, the current passing through the first heating track 11 is the same as the current passing through the second heating track 12. The heat generation of the heating track is calculated by Q = I 2 Rt, where Q is the heat generation, I is the current, R is the resistance, and t is the time. Therefore, in order to form a high-temperature heating zone and a low-temperature heating zone on the heating track and make the single heating track present different heat temperature distribution situations, the resistance values of the high-temperature heating zone and the low-temperature heating zone can be made inconsistent.

[0055] Preferably, when the heating times of the first heating track 11 and the second heating track 12 are staggered from each other, the resistance of the first convex portion 113 located in the first high-temperature heating zone A1 is equal to the resistance of the second convex portion 123 located in the second high-temperature heating zone B1, and the resistance of the first convex portion 113 located in the first low-temperature heating zone a1 is equal to the resistance of the second convex portion 123 located in the second low-temperature heating zone b1. At this time, when switching different heating tracks for heating, the heat generation of the high-temperature heating zones of different heating tracks can be kept consistent, and the heat generation of the low-temperature heating zones can also be kept consistent, and the heating is more uniform.

[0056] According to the formula for resistance, length, and cross-sectional area: R = ρL / S, where R is the resistance, S is the cross-sectional area, L is the length, and ρ is the resistivity, the resistance can be changed by changing the resistivity or the cross-sectional area, so that the resistances of the high-temperature heating zones and the low-temperature heating zones of the first heating track 11 and the second heating track 12 are inconsistent.

[0057] In this embodiment, continue to refer to Figure 1 and in combination with Figure 2a and Figure 2b, the resistivity of the first convex portion 113 located in the first high-temperature heating zone A1 is higher than that of the first convex portion 113 located in the first low-temperature heating zone a1, and the resistivity of the second convex portion 123 located in the second high-temperature heating zone B1 is higher than that of the second convex portion 123 located in the second low-temperature heating zone b1.

[0058] Specifically, the materials of the first convex portion 113 located in the first high-temperature heating zone A1 and the second convex portion 123 located in the second high-temperature heating zone B1 are high-resistivity materials, such as nickel-chromium alloy, tungsten, or platinum. The materials of the first convex portion 113 located in the first low-temperature heating zone a1 and the second convex portion 123 located in the second low-temperature heating zone b1 are low-resistivity materials, such as gold, silver, or copper. At this time, the size widths and thicknesses of the first heating track 11 and the second heating track 12 are both consistent, and the track distribution is uniform. When the cross-sectional size S of each part of a single heating track is the same, but due to the difference in resistivity ρ of the constituent materials, the resistance values of the high-resistivity section and the low-resistivity section are significantly different, and thus high-temperature and low-temperature heating zones can be formed.

[0059] In another embodiment, referring to Figure 3 and combining Figure 4a and Figure 4b , the heating assembly 2 has a first heating track 21, a second heating track 22, and a tubular heating substrate 23, and both the first heating track 21 and the second heating track 22 are provided on the tubular heating substrate 23. Among them, Figure 3 shows the heating assembly 2 before and after disassembly. Figure 3 On the left are the disassembled first heating track 21, second heating track 22, and tubular heating substrate 23, and the combination of the three forms Figure 3 the heating assembly 2 shown on the right. For ease of observation, Figure 4a shows a schematic diagram of the heating track in the heating assembly 2 after being unfolded, Figure 4b is a schematic diagram before the heating track is unfolded. The first heating track 21 has a plurality of first convex portions 213, and adjacent first convex portions 213 form a first concave portion 214. The second heating track 22 has a plurality of second convex portions 223, and adjacent second convex portions 223 form a second concave portion 224. The first heating track 21 successively forms a first high-temperature heating zone A2 and a first low-temperature heating zone a2 in the first direction x. The second heating track 22 successively forms a second low-temperature heating zone b2 and a second high-temperature heating zone B2 in the first direction x. Among them, the heating assembly 2 has a first end 021 and a second end 022, and the first direction x is the direction along the axis from the first end 021 to the second end 022.

[0060] Among them, the first convex portion 213 located in the first high-temperature heating zone A2 has a first high-temperature cross-section S1, and the first convex portion 213 located in the first low-temperature heating zone a2 has a first low-temperature cross-section s1. Among them, both the first high-temperature cross-section S1 and the first low-temperature cross-section s1 are cross-sections perpendicular to the direction in which the current flows through the first convex portion 213, and the area of the first high-temperature cross-section S1 is smaller than the area of the first low-temperature cross-section s1. The second convex portion 223 located in the second high-temperature heating zone B2 has a second high-temperature cross-section S2, and the second convex portion 223 located in the second low-temperature heating zone b2 has a second low-temperature cross-section s2. The second high-temperature cross-section S2 and the second low-temperature cross-section s2 are both cross-sections perpendicular to the direction in which the current flows through the second convex portion 223, and the area of the second high-temperature cross-section S2 is smaller than the area of the second low-temperature cross-section s2. In this embodiment, the first heating track 21 and the second heating track 22 are made of the same material, but each heating track itself has variations in thickness, different cross-sectional areas, and uneven track distributions.

[0061] When the resistivity ρ of each part of a single heating track is the same, but due to the differences in the width of the heating track, that is, the cross-sectional area S, the resistance of the wide cross-section part is smaller, while the resistance value of the narrow cross-section part is larger. At this time, the wide cross-section part forms a low-temperature heating zone, and the narrow cross-section part forms a high-temperature heating zone. Therefore, when passing the same current I, according to the heat generation formula Q = I 2 Rt, where Q is the heat generation, I is the current, R is the resistance, and t is the time, a single heating track shows different heat and temperature distributions.

[0062] Furthermore, the material and cross-sectional area of the heating track can be comprehensively considered, and by adjusting the materials and cross-sectional thicknesses of different heating tracks respectively, a greater temperature difference can be achieved, thereby further enhancing the actual effect of temperature segmented heating.

[0063] Continue to refer to Figure 2a and Figure 2b , the first heating track 11 has a first starting end and a first terminating end, and the second heating track 12 has a second starting end and a second terminating end. The first starting end, the first terminating end, the second starting end, and the second terminating end are all located at the second end 012 of the heating component 1. Among them, the second end 012 is the end far from the mouthpiece. Specifically, during suction, the airflow flows through the heating component 1 in the opposite direction of the first direction x. The heating component 1 can be divided into an airflow downstream end 101 and an airflow upstream end 102 as a whole. The airflow downstream end 101 is the end close to the mouthpiece during suction, and the airflow upstream end 102 is the end far from the mouthpiece during suction. The second end 012 is located at the airflow upstream end 102. By setting the heating track in this way, during suction, the airflow is not likely to pass through the electrode electrically connected to the heating track, which can prevent the electrode from being damaged by the airflow, improve the reliability of the device, and setting all the electrodes at the same end has a simple structure, is convenient for layout, is beneficial to saving the length of the wires used, and reduces costs.

[0064] The first starting end of the first heating track 11 is connected to one of the positive electrode and the negative electrode of the circuit, and the first terminating end of the first heating track 11 is connected to the other of the positive electrode and the negative electrode of the circuit. That is, when the first starting end of the first heating track 11 is connected to the positive electrode of the circuit, the first terminating end of the first heating track 11 is connected to the negative electrode of the circuit. It can also be that the first starting end of the first heating track 11 is connected to the negative electrode of the circuit, and the first terminating end of the first heating track 11 is connected to the positive electrode of the circuit. Similarly, the second starting end of the second heating track 12 is connected to one of the positive electrode and the negative electrode of the circuit, and the second terminating end of the second heating track 12 is connected to the other of the positive electrode and the negative electrode of the circuit.

[0065] Furthermore, in this embodiment, referring to Figure 2a and Figure 2b , the first heating track 11 and the second heating track 12 share the same positive electrode or negative electrode of the circuit. More specifically, for example, the first starting end of the first heating track 11 is connected to the first wire 01, the second starting end of the second heating track 12 is connected to the third wire 03, and the first terminating end of the first heating track 11 and the second terminating end of the second heating track 12 are both connected to the second wire 02. At this time, the first heating track 11 is conducted through the first wire 01 and the second wire 02, and the second heating track 12 is conducted through the second wire 02 and the third wire 03. The first heating track 11 and the second heating track 12 can be conducted through three electrodes, which can reduce the number of wires used and is beneficial to cost reduction. Adopting this connection method, the first heating track 11 and the second heating track 12 are independently controlled from each other, and the heating times of the first heating track 11 and the second heating track 12 can be staggered from each other.

[0066] Specifically, during heating, the first heating track 11 is energized and the second heating track 12 is not energized. The same current passes through the first heating track 11, forming a first high-temperature heating zone A1 at the downstream end 101 of the air flow of the entire heating assembly 1 and a first low-temperature heating zone a1 at the upstream end 102 of the air flow of the entire heating assembly 1. When the atomizable substance at the downstream end 101 of the air flow has evaporated completely, the power supply to the first heating track 11 is stopped, making the first heating track 11 non-energized, and the second heating track 12 is energized. At this time, the same current passes through the second heating track 12, forming a second high-temperature heating zone B1 at the upstream end 102 of the air flow of the entire heating assembly 1 and a second low-temperature heating zone b1 at the downstream end 101 of the air flow of the heating assembly 1. The second heating track 12 heats the atomizable substance until the atomizable substance has evaporated completely. By heating the atomizable substance with the high-temperature and low-temperature heating zones of different heating tracks staggered in time, it helps to prevent the heat from being too concentrated, achieve milder heating, prevent the overshoot of the heating temperature, avoid burning, and can also preheat or keep warm the corresponding other areas of the atomizable substance through the low-temperature heating zone, so as to reduce the smoke pause when switching the heating track and avoid waiting too long for the smoke to appear.

[0067] Figure 4a and Figure 4b In the first heating track 21 and the second heating track 22 in the illustrated embodiment, the electrical connection and heating can also be carried out in the above-mentioned manner. At this time, the narrow cross-section part of the first heating track 21 is the first high-temperature heating zone A2, corresponding to the downstream end 101 of the air flow; the wide cross-section part of the first heating track 21 is the first low-temperature heating zone a2, corresponding to the upstream end 102 of the air flow. The narrow cross-section part of the second heating track 22 is the second high-temperature heating zone B2, corresponding to the upstream end 102 of the air flow; the wide cross-section part of the second heating track 22 is the second low-temperature heating zone b2, corresponding to the downstream end 101 of the air flow. The first heating track 21 and the second heating track 22 are electrically connected through three wires, and the heating times are also staggered from each other.

[0068] Adopting the above heating method, the first heating track 11 and the second heating track 12 sequentially heat the atomizable substance respectively, and the heating times are staggered from each other. Through multi-level temperature control, it is beneficial to make the temperature difference between the upstream and downstream of the air flow larger, and the distinction between the high-temperature heating zone and the low-temperature heating zone more obvious. It can avoid the over-speed volatilization of the smoking substance caused by the over-concentration of heat, make the volatilization intensity of the aerosol uniform and gentle, extend the volatilization time, and can also ensure the consistency of the smoke in the front and rear sections during the total suction time.

[0069] Reference Figure 5, in other embodiments, the first heating track 11 has a first starting end and a first terminating end, and the second heating track 12 has a second starting end and a second terminating end. The first starting end is independently connected to one of the positive electrode and the negative electrode of the circuit, and the first terminating end is independently connected to the other of the positive electrode and the negative electrode of the circuit; the second starting end is independently connected to one of the positive electrode and the negative electrode of the circuit, and the second terminating end is independently connected to the other of the positive electrode and the negative electrode of the circuit, that is, the first heating track 11 and the second heating track 12 do not share the positive electrode or the negative electrode of the circuit. The first heating track 11 and the second heating track 12 are independently controlled. Specifically, the first starting end of the first heating track 11 is connected to the first wire 01, the first terminating end of the first heating track 11 is connected to the second wire 02, the second starting end of the second heating track 12 is connected to the fourth wire 04, and the second terminating end of the second heating track 12 is connected to the third wire 03. In this embodiment, the heating times of the first heating track 11 and the second heating track 12 can be staggered from each other, or the heating moments can be the same. Preferably, the heating moments of the first heating track 11 and the second heating track 12 are the same, but there is a difference in heat generation, that is, the temperature of the region formed by the first high-temperature heating region A1 and the second low-temperature heating region b1 is different from the temperature of the region formed by the second high-temperature heating region B1 and the first low-temperature heating region a1.

[0070] Specifically, referring to Figure 7 , exemplarily, a voltage Vα is set between the first wire 01 and the second wire 02, and a voltage Vβ is set between the third wire 03 and the fourth wire 04. Starting from the start of heating, the value of the voltage Vα on the first heating track 11 is relatively high, and the voltage Vβ on the second heating track 12 is relatively low. Therefore, it can be ensured that the temperature of the first high-temperature heating region A1 of the first heating track 11 is significantly higher than the temperature of the second high-temperature heating region B1 of the second heating track 12. After a period of time, for example, at time tα, the voltage on the second heating track 12 starts to increase, and the heat generation increases. At time tβ, the voltage on the first heating track 11 starts to decrease, and the heat generation decreases. Among them, tβ is greater than or equal to tα (tβ≥tα). After passing time tβ, the temperature between the first heating track 11 and the second heating track 12 starts to reverse. Correspondingly, the temperature of the second high-temperature heating region B1 of the second heating track 12 starts to exceed the temperature of the first high-temperature heating region A1 of the first heating track 11. By adopting this method, making the voltage on the second heating track 12 increase first, and then making the voltage on the first heating track 11 decrease after a period of time, or making the voltages on the first heating track 11 and the second heating track 12 change simultaneously, is beneficial to avoiding the problem of insufficient heat supply caused by one heating track's voltage dropping first and then the other heating track's voltage rising after a period of time when the high and low temperatures are switched between the two heating tracks.

[0071] Meanwhile, referring to Figure 8 , the first low-temperature heating zone a1 of the first heating track 11 and the second low-temperature heating zone b1 of the second heating track 12 are always working, which can play the role of preheating and maintaining the temperature.

[0072] With the above technical solution, the high-temperature heating zones and low-temperature heating zones of different heating tracks work simultaneously. The high-temperature heating zone and the low-temperature heating zone are no longer clearly divided into upper and lower sections. There is no obvious sectional boundary between them, but there is a temperature difference, realizing multi-level temperature control. It can avoid the over-concentration of heat causing the overspeed volatilization of the atomizable substance, make the volatilization intensity of the aerosol uniform and gentle, extend the volatilization time, and ensure the consistency of the smoke in the front and back sections during the total suction time.

[0073] Specifically, referring to Figure 9 , Figure 9 the conventional heating track in Figure 9 refers to a heating track where the high-temperature heating zones and low-temperature heating zones of different heating tracks do not intersect with each other.

[0074] Figure 6 The embodiment shown in Figure 5 is the same as Figure 6 and will not be elaborated here. Among them, Figure 5 the difference between Figure 5 and Figure 6 is that: Figure 6 the embodiment shown in Figure 5 forms the high-temperature heating zone and the low-temperature heating zone by adjusting the material of the heating track; Figure 6The high-temperature heating zone and the low-temperature heating zone of different heating trajectories work simultaneously. The high-temperature heating zone and the low-temperature heating zone are no longer two distinct upper and lower regions. There is no obvious segmented boundary between them, but there is a temperature difference, achieving multi-level temperature control. This can avoid the over-concentration of heat causing the over-volatilization of the aerosolizable substance, making the volatilization intensity of the aerosol uniform and gentle, prolonging the volatilization time, and ensuring the consistency of the smoke in the front and rear sections during the total suction time. Figure 6 The overall staggered heating trajectory can also transform the sharp peak when the temperature of the conventional heating trajectory preheats and surges into a relatively round and gentle curve, thereby avoiding the burnt-smelling smoke caused by too high preheating temperature, forming a relatively gentle smoke, improving the flavor and taste of suction, and improving the suction experience.

[0075] In a second aspect, an embodiment of the present invention provides an aerosol generating device that can heat an aerosol generating article through the heating component 1 in any of the foregoing embodiments (taking the heating component 1 as an example for illustration, and the heating component 2 in each of the above embodiments is the same). The heating component of the aerosol generating device can achieve segmented heating through the high-temperature heating zone and the low-temperature heating zone of the first heating trajectory 11 and the second heating trajectory 12 respectively. Moreover, the high-temperature heating zone of the first heating trajectory 11 intersects with the low-temperature heating zone of the second heating trajectory 12, and the low-temperature heating zone of the first heating trajectory 11 intersects with the high-temperature heating zone of the second heating trajectory 12. During segmented heating, it is beneficial to gradually heat each part of the aerosol generating article, fully heat the aerosol generating article, prolong the aerosol volatilization time, ensure the consistency of aerosol release, and improve the taste.

[0076] In a third aspect, a control method of the heating component can be used to control the heating component 1 described in any of the foregoing embodiments (taking the heating component 1 as an example for illustration, and the heating component 2 in each of the above embodiments is the same) or the aerosol generating device to heat the aerosolizable substance. The control method of the heating component 1 specifically includes the following steps:

[0077] S1: Control the first heating trajectory of the heating component to heat, and the duration of heating of the first heating trajectory is a preset time; when the heating of the first heating trajectory ends, control the second heating trajectory of the heating component to heat, and the duration of heating of the second heating trajectory is a preset time.

[0078] In this embodiment, the heating times of the first heating trajectory 11 and the second heating trajectory 12 are staggered from each other. The preset time is the time when the aerosolizable substance corresponding to the position of the first high-temperature heating zone A1 of the first heating trajectory 11 is volatilized completely when the first heating trajectory 11 of the heating component 1 is heated.

[0079] With the above technical solution, segmented heating is achieved by controlling the high-temperature heating zones and low-temperature heating zones of the first heating track 11 and the second heating track 12 of the heating component. Moreover, the high-temperature part of the first heating track 11 intersects with the low-temperature part of the second heating track 12, and the low-temperature part of the first heating track 11 intersects with the high-temperature part of the second heating track 12. The heating times of the first heating track 11 and the second heating track 12 are staggered. During segmented heating, it is beneficial to gradually heat each part of the aerosol-generating article, fully heat the aerosol-generating article, extend the aerosol volatilization time, ensure the consistency of aerosol release, and improve the taste.

[0080] In a fourth aspect, the heating component or the aerosol-generating device described in any of the foregoing embodiments can be controlled by a control method of the heating component to heat the atomizable substance. The control method of the heating component specifically includes the following steps:

[0081] S2: Control the first heating track and the second heating track of the heating component to heat simultaneously.

[0082] S3: After a first preset time, control the voltage on the second heating track to increase so as to increase the heat generation amount of the second heating track; after a second preset time, control the voltage on the first heating track to decrease so as to decrease the heat generation amount of the first heating track.

[0083] In this embodiment, the heating component 1 is taken as an example for illustration, and the heating component 2 in the above embodiments is the same by analogy. Among them, the temperature of the region formed by the first high-temperature heating zone A1 of the first heating track 11 and the second low-temperature heating zone b1 of the second heating track 12 is different from the temperature of the region formed by the second high-temperature heating zone B1 of the second heating track 12 and the first low-temperature heating zone a1 of the first heating track 11. The length of the first preset time is less than or equal to the length of the second preset time. Further, the first preset time can be set, for example, as the time when the atomizable substance corresponding to the position of the second high-temperature heating zone B1 of the second heating track 12 volatilizes completely. The total heating time of the first heating track 11 and the second heating track 12 for the atomizable substance is a preset time, and the preset time is the time when each part region of the atomizable substance volatilizes completely.

[0084] Adopting the above technical solution, segmented heating is achieved by controlling the high-temperature heating zones and low-temperature heating zones of the first heating track 11 and the second heating track 12 of the heating component 1 respectively. Moreover, the high-temperature part of the first heating track 11 intersects with the low-temperature part of the second heating track 12, and the low-temperature part of the first heating track 11 intersects with the high-temperature part of the second heating track 12. The first heating track 11 and the second heating track 12 are heated simultaneously. This can not only enable the low-temperature heating zone to continuously operate for heat preservation and preheating, but also form a temperature difference through the high-temperature heating zones and low-temperature heating zones of the two heating tracks respectively to achieve segmented heating, which is beneficial to gradually heating each part of the aerosol-generating article, fully heating the aerosol-generating article, prolonging the aerosol volatilization time, ensuring the consistency of aerosol release, and improving the taste.

[0085] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A heating component, characterized in that, Comprising: A first heating track, including a plurality of first protrusions and a plurality of first recesses, the first protrusions extending circumferentially and being axially spaced apart, the first recesses being formed between adjacent first protrusions, the first protrusions and the first recesses sequentially forming a first high-temperature heating zone and a first low-temperature heating zone in a first direction, the heating assembly having a first end and a second end axially opposite to each other, the first direction being the direction from the first end to the second end of the heating assembly along the axis; A second heating track, including a plurality of second protrusions and a plurality of second recesses, the second protrusions extending circumferentially and being axially spaced apart, the second recesses being formed between adjacent second protrusions, the second protrusions and the second recesses sequentially forming a second low-temperature heating zone and a second high-temperature heating zone in the first direction; The first heating track and the second heating track are circumferentially distributed, the first protrusions cooperate with the second recesses, and the first recesses cooperate with the second protrusions, so that the first high-temperature heating zone and the second low-temperature heating zone cross each other circumferentially, and the first low-temperature heating zone and the second high-temperature heating zone cross each other circumferentially.

2. The heating assembly according to claim 1, wherein, The heating assembly further includes a tubular heating base, and the first heating track and the second heating track surround the tubular heating base along the circumference of the tubular heating base; the first heating track and the second heating track are provided on the inner wall of the tubular heating base, or the first heating track and the second heating track are provided on the outer peripheral wall of the tubular heating base.

3. The heating component according to claim 1, characterized in that The first heating track and the second heating track are comb-shaped or serrated, the first heating track is integrally bent, and / or the second heating track is integrally bent.

4. The heating assembly according to claim 1, wherein, Both the first protrusions and the second protrusions are sheet-shaped, and both the first protrusions and the second protrusions have slits extending circumferentially.

5. The heating assembly according to claim 1, characterized in that, The resistance of the first protrusions in the first high-temperature heating zone is higher than the resistance of the first protrusions in the first low-temperature heating zone, and the resistance of the second protrusions in the second high-temperature heating zone is higher than the resistance of the second protrusions in the second low-temperature heating zone.

6. The heating component according to claim 5, characterized in that The resistance of the first protrusions in the first high-temperature heating zone is equal to the resistance of the second protrusions in the second high-temperature heating zone, and the resistance of the first protrusions in the first low-temperature heating zone is equal to the resistance of the second protrusions in the second low-temperature heating zone.

7. The heating assembly according to claim 5, characterized in that, The resistivity of the first protrusions in the first high-temperature heating zone is higher than the resistivity of the first protrusions in the first low-temperature heating zone, and the resistivity of the second protrusions in the second high-temperature heating zone is higher than the resistivity of the second protrusions in the second low-temperature heating zone.

8. The heating component according to claim 5, wherein, The first convex portion located in the first high-temperature heating zone has a first high-temperature cross-section, and the first convex portion located in the first low-temperature heating zone has a first low-temperature cross-section. Both the first high-temperature cross-section and the first low-temperature cross-section are cross-sections perpendicular to the direction of current flowing through the first convex portion, and the area of the first high-temperature cross-section is smaller than the area of the first low-temperature cross-section. The second convex portion located in the second high-temperature heating zone has a second high-temperature cross-section, and the second convex portion located in the second low-temperature heating zone has a second low-temperature cross-section. Both the second high-temperature cross-section and the second low-temperature cross-section are cross-sections perpendicular to the direction of current flowing through the second convex portion, and the area of the second high-temperature cross-section is smaller than the area of the second low-temperature cross-section.

9. The heating assembly according to claim 1, wherein, The first heating track has a first starting end and a first terminating end, and the second heating track has a second starting end and a second terminating end. The first starting end, the first terminating end, the second starting end, and the second terminating end are all located at the second end of the heating component, and the second end is the end away from the mouthpiece.

10. The heating assembly according to claim 1, characterized in that, The first heating track has a first starting end and a first terminating end, and the second heating track has a second starting end and a second terminating end. The first starting end is connected to one of the circuit positive electrode and the circuit negative electrode, and the first terminating end is connected to the other of the circuit positive electrode and the circuit negative electrode; the second starting end is connected to one of the circuit positive electrode and the circuit negative electrode, and the second terminating end is connected to the other of the circuit positive electrode and the circuit negative electrode; the first heating track and the second heating track share the same circuit positive electrode or circuit negative electrode.

11. The heating assembly according to claim 1, wherein The first heating track has a first starting end and a first terminating end, and the second heating track has a second starting end and a second terminating end. The first starting end is independently connected to one of the circuit positive electrode and the circuit negative electrode, and the first terminating end is independently connected to the other of the circuit positive electrode and the circuit negative electrode; the second starting end is independently connected to one of the circuit positive electrode and the circuit negative electrode, and the second terminating end is independently connected to the other of the circuit positive electrode and the circuit negative electrode.

12. An aerosol generating device, characterized in that, Comprising a heating component according to any one of claims 1-11.

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