Heating body, aerosol generating product and aerosol generating system

Abstract

The invention relates to a heating element, an aerosol generating product and an aerosol generating system. The heating body is used for heating an aerosol generating substrate and comprises at least two heating areas which are adjacently arranged at intervals, and the at least two heating areas comprise at least one first heating area which emits heat firstly and at least one second heating area which emits heat in sequence subsequently. According to the invention, the curve trend of endurance time and heat release temperature rise of the heating body can be improved, the heating temperature of the heating body is reduced, a heat source can advance along with time delay, the aerosol heating time can be prolonged, the utilization rate of an aerosol generation matrix is improved, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of aerosol technology, and in particular to a heating element, an aerosol generating product and an aerosol generating system. Background Art

[0002] In the related art, the temperature control of the heating element of the self-heating aerosol generating product is generally achieved by adding substances to change the heat release temperature and heat release rate. The added substances include, for example, combustion aid calcium peroxide or ceramic particles. Although the above methods can usually extend the life of the heating element, the trend of the temperature curve remains basically unchanged, and almost always presents a parabola with a peak (such as Fig.10 shown).

[0003] For example Fig.10 As shown, the heating element in the related technology will also have a heat accumulation phenomenon, that is, as the heating time increases, the temperature becomes higher and higher, and a higher peak will appear in the heating curve. For example, the heating peak value can reach about 400°C. When the temperature is too high, the aerosol generating product may be overheated, resulting in the volatilization of harmful substances and affecting the user's health and taste.

[0004] It can be seen that the related technologies have deficiencies such as the heating element of the self-heating aerosol generating product cannot regulate the temperature itself and the lack of heating temperature control leads to unsatisfactory aerosol release, thus affecting the user experience. Summary of the invention

[0005] The technical problem to be solved by the present application is to provide an improved heating element, aerosol generating product and aerosol generating system.

[0006] The technical solution adopted by the present application to solve its technical problem is: a heating body for heating an aerosol generating substrate, comprising at least two heating zones arranged adjacent to each other, wherein the at least two heating zones include at least one first heating zone that generates heat first, and at least one second heating zone that generates heat subsequently in sequence.

[0007] Further, in the heating element described in the present application, the first heating area undergoes an exothermic reaction based on the heating of the heating activation component to generate heat.

[0008] Furthermore, in the heating element described in the present application, the second heating area generates an exothermic reaction based on the heat generated by the adjacent heating area that has generated heat to heat the aerosol generating substrate.

[0009] Furthermore, in the heating element described in the present application, the total length of the heating element is between 30 mm and 40 mm, and the length of each heating zone is greater than or equal to 2 mm.

[0010] Furthermore, in the heating element described in the present application, the interval between any two adjacent heating areas is less than or equal to 1 mm.

[0011] Furthermore, in the heating element described in the present application, the heating element is in at least one of a linear chain shape, a ring chain shape, and a hollow column chain shape.

[0012] Furthermore, in the heating element described in the present application, each of the heating areas comprises a metal material, and the metal material is used to generate an exothermic reaction to provide heat for heating the aerosol generating substrate.

[0013] Furthermore, in the heating element described in the present application, when in a heat release state, the peak value of the surface temperature of each of the heating zones is between 200°C and 350°C.

[0014] In addition, the present application also provides an aerosol generating product, comprising an aerosol generating substrate and a heating element as described above, wherein the heating element is arranged at the center of the aerosol generating substrate; or

[0015] The heating element is arranged at the end of the aerosol generating substrate; or

[0016] The heating element is arranged around the aerosol generating substrate. In addition, the present application also provides an aerosol generating system, comprising the aerosol generating product as described above, and a heating activation component for heating the first heating area to generate heat.

[0017] The implementation of the heating element, aerosol generating product and aerosol generating system of the present application has at least the following beneficial effects: the heating element of the present application can improve the heating element endurance time and the curve trend of heat release and temperature rise, reduce the heating temperature of the heating element, and enable the heat source to be delayed over time, which is beneficial to extend the aerosol heating time, improve the utilization rate of the aerosol generating matrix, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 is a schematic structural diagram of an aerosol generating system in the first embodiment of the present application;

[0020] Figure 2 yes Figure 1 an exploded view of the aerosol generating system shown;

[0021] Figure 3 yes Figure 1 The schematic diagram of the structure of the aerosol generating article shown, wherein: Figure 3 a is Figure 1 a front view of the aerosol-generating article shown, Figure 3 b is Figure 1 a side view of the aerosol-generating article shown;

[0022] Figure 4 yes Figure 3 A graph showing the theoretical temperature of the heating element of the aerosol generating article;

[0023] Figure 5 yes Figure 3 A comparison chart of experimental temperature measurement curves of the heating element of the aerosol generating product shown and the integrated heating element in the related art;

[0024] Figure 6 is a theoretical temperature curve diagram of the heating element in the second embodiment of the present application;

[0025] Figure 7 is a theoretical temperature curve diagram of the heating element in the third embodiment of the present application;

[0026] Figure 8 is a schematic diagram of the structure of an aerosol generating article in a fourth embodiment of the present application, wherein: Figure 8 a is a front view of the aerosol generating product in the fourth embodiment of the present application, Figure 8 b is a side view of an aerosol generating article in a fourth embodiment of the present application;

[0027] Fig. 9 is a schematic diagram of the structure of an aerosol generating article in the fifth embodiment of the present application, wherein: Fig. 9 a is a front view of an aerosol generating article 20 in a fifth embodiment of the present application, Fig. 9 b is a side view of an aerosol generating article 20 in a fifth embodiment of the present application;

[0028] Fig.10 It is a theoretical temperature curve diagram of the integrated heating element in the related technology.

[0029] In the figure: 1-aerosol generating system, 10-aerosol generating device, 20-aerosol generating product, 21-heating element, 13-receiving chamber, 113-heating start component. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings.

[0031] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0032] Figure 1 and Figure 2 An aerosol generating system 1 in a first embodiment of the present application is shown, and the aerosol generating system 1 can be used to generate aerosols, and can include an aerosol generating device 10 and an aerosol generating product 20 detachably connected to the aerosol generating device 10. The aerosol generating product 20 can be a disposable self-heating aerosol generating product, and can include an aerosol generating substrate and a self-heating heating element 21 connected to the aerosol generating substrate. The aerosol generating device 10 can be used to provide a starting heat source for the aerosol generating product 20 of the aerosol, so as to stimulate the heating element 21 to automatically release heat, thereby heating the aerosol generating substrate to release the aerosol.

[0033] Specifically, the aerosol generating device 10 may include a heating start component 113 and a receiving chamber 13. The receiving chamber 13 is used to receive the aerosol generating product 20. The heating start component 113 is arranged at the bottom of the receiving chamber and can generate heat after being powered on to stimulate the first heating area of ​​the heating element 21 of the aerosol generating product 20 placed in the receiving chamber 13 to generate heat. The heating start component 113 includes but is not limited to heating devices such as open flame, resistance, microwave, electromagnetic, laser, etc., and its function is to start the heating element 21 to produce an exothermic reaction. Of course, the heating start component 113 can remain connected to the first heating area; it can also be placed separately from the first heating area, and when the first heating area needs to be started, it is manually approached and the heating is started.

[0034] In this embodiment, the heating element 21 includes at least two heating zones arranged adjacent to each other, wherein the at least two heating zones include a first heating zone that generates heat first (e.g., a zone close to the heating start component 113), and at least one second heating zone that generates heat subsequently (e.g., a zone away from the heating start component 113). In this embodiment, the first heating zone and the second heating zone can be two sections of the heating element 21 that are equally divided in the axial direction. It can be understood that the axial division of the heating element 21 is not limited to two sections, and it can also be divided into three sections or more as needed.

[0035] Figure 3 A schematic diagram of the structure of an aerosol generating article 20 is shown, wherein: Figure 3 a is a front view of the aerosol generating product 20, Figure 3b is a side view of the aerosol generating article 20. As shown in the figure, the heating element 21 is in the shape of an elongated cylinder and is embedded in the middle of the aerosol generating substrate along the axis so that the aerosol generating substrate can be heated by central heating.

[0036] In this embodiment, the heating element 21 is divided into two areas (or two sections) in the axial direction and a gap is provided between the two areas. Specifically, the total length of the heating element 21 in the axial direction can be between 30mm and 40mm, and the length of each heating area is greater than or equal to 2mm. In other words, the partition cannot be reduced indefinitely, and the heat generated by each heating area must be sufficient to maintain its own reaction and external heat supply, otherwise the heat release will be interrupted due to cooling. For example, taking the metal heating element 21 as an example, the length of a single heating area can be set to be greater than or equal to 2mm, such as 2mm, 3mm, 5mm, 8mm, 10mm, 12mm, 14mm, 15mm, etc.

[0037] Interval is one of the methods to slow down heat conduction. Since the thermal resistance of air is very large, it is easy to cause heat to be unable to be transferred to the next heating zone. Therefore, in the heating element 21 of some embodiments, the interval between any two adjacent heating zones can be set to be less than or equal to 1mm. In other words, appropriately increasing the interval thermal resistance (such as increasing the partition gap) can slightly slow down the heat transfer between partitions, thereby extending the heating time. Since this method can easily lead to heat release interruption, the interval cannot be set too large. Exemplarily, taking the metal heating element 21 as an example, the interval between two adjacent heating zones can be less than or equal to 1mm, such as 0.15mm, 0.3mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm, 1mm, etc.

[0038] In addition, the heating element 21 has different zone lengths in the axial direction of the aerosol generating article 20 , and will present different wave peaks and heating times.

[0039] In this embodiment, since the heating element 21 is designed to be composed of at least two heating zones arranged adjacent to each other, when the heating start component 113 generates heat, the first heating zone of the heating element 21 is heated first (that is, the first heating zone undergoes an exothermic reaction based on the heating of the heating start component 113 to generate heat), and after the first heating zone has been heated for a period of time, the second heating zone is stimulated to generate heat (that is, the second heating zone undergoes an exothermic reaction based on the heating of the first heating zone to generate heat), so that different heating zones of the heating element 21 are stimulated one by one.

[0040] Read also Figure 4After the heating element 21 is divided into at least two partitions of equal length, the temperature curve during heat release no longer presents a parabolic heat release trend like the heat release temperature curve of the integrated heating element in the related art. Instead, the heating element 21 is heated successively according to the partitions, so that the temperature of the heating element 21 during heat release presents a heat release trend with several peaks, which can improve the endurance time of the heating element 21 and the curve trend of heat release and temperature rise, reduce the scale of the exothermic reaction, thereby reducing the reaction heat, and lowering the heating temperature of the heating element 21, so that the heat source can be delayed over time, prolonging the aerosol heating time, improving the utilization rate of the aerosol generation matrix, and enhancing the user experience.

[0041] Figure 5 It is a comparison chart of the experimental temperature measurement curves of the integrated heating element in the related art and the partitioned heating element 21 in this embodiment. It can be seen from the figure that the maximum heating temperature of the partitioned heating element 21 in this embodiment can be reduced by about 50°C, and the longest heating time is extended by about 10%. Since the second heating zone needs a warming preheating process from room temperature to the start of reaction (such as 300°C), the heat transfer backward can be slowed down by partitioning the heating element 21. Correspondingly, the heat release of the second heating zone is delayed, thereby achieving an intermittent heat release effect, which can reduce the scale of the exothermic reaction, reduce the heat release of the reaction, and reduce the heating temperature of the heating element 21. In other words, a part of the area or a section of the area is heated first, and then the preheating process of the latter section is gradually improved. Then, the process of starting the heat release in the latter section will be delayed, and then there will be no situation where heat accumulation pushes up, and the temperature will not continue to rise, but will form several small peaks.

[0042] It can be understood that the heating method of the first heating zone can be electric heating, such as resistance heating, electromagnetic heating, laser heating, microwave heating, etc.; it can also be an exothermic reaction, such as metal oxidation reaction, reaction of more active metal and acid, neutralization reaction, electrochemical reaction, exothermic reaction of unstable substance into stable substance, etc.

[0043] From the above, it can be seen that the present embodiment can improve the endurance time and the curve trend of the heat release and temperature rise of the heating element 21, reduce the maximum heating temperature of the heating element 21, and enable the heat source to be delayed over time, which is beneficial to prolonging the aerosol heating time, improving the utilization rate of the aerosol generation matrix, and enhancing the user experience.

[0044] It should be noted that the purpose of constructing the heating element 21 of the present application in this way is to achieve temperature control by itself. Specifically, by zoning the heating element 21 to adjust the size and speed of the exothermic reaction, a heating curve with multiple lower peaks can be presented but sufficient to meet the heating of the aerosol generation matrix.

[0045] Optionally, the size and number of heating zones can be determined according to specific requirements, such as a preset heating curve, so that the heating element 21 of the present application can adapt to the heating requirements of different aerosol generating substrates to generate aerosols, such as heating time, heating temperature, etc.

[0046] When the exothermic reaction transitions between multiple adjacent second heating zones, the second heating zone that heats later needs to absorb heat to start the exothermic reaction, presenting a subsequent heating effect. By controlling the intermittent heating of multiple heating zones in sequence, high-temperature decomposition can be reduced, thereby improving the user experience of aerosol products.

[0047] It can be understood that each heating zone can be connected into a whole, and adjacent heating zones are connected by non-heating materials. In this way, for a strip-shaped heating element, it is in the shape of a straight chain; for an annular heating element, it is in the shape of a ring chain; for a hollow columnar heating element, it is in the shape of a hollow column chain. Each heating zone can also be independent and buried in the aerosol generating matrix at intervals. For example, the heating element 21 can be made into a segmented series type (similar to a bracelet), or it can be made into a granular fuel. Heat conduction is carried out through mutual contact to avoid the problem of heat accumulation (increasing temperature) of the integrated heating element.

[0048] It should be noted that the heating element 21 in the present application refers to a component that provides heat for the aerosol generating matrix, and its heating principle is usually metal oxidation reaction, reaction of more active metals with acids, neutralization reaction, electrochemical reaction, and exothermic reaction from unstable substances to stable substances.

[0049] The aerosol-generating substrate in the present application may be a plant material or compound that releases an aerosol after heating; the plant material includes but is not limited to tobacco, medicinal materials, spices, etc.; the compound includes but is not limited to volatile compounds containing nicotine.

[0050] In this embodiment, the temperature of the heating element 21 when releasing heat no longer presents a parabolic heat release trend like the traditional heating element 21, but the temperature when releasing heat presents a heat release trend with several peaks according to the segmented / partitioned method, which can improve the endurance time of the heating element 21 and the curve trend of heat release and temperature rise, and can reduce the scale of the exothermic reaction, thereby reducing the reaction heat release, lowering the heating temperature of the heating element 21, allowing the heat source to be delayed over time, extending the aerosol heating time, improving the utilization rate of the aerosol generation matrix, and enhancing the user experience.

[0051] In this embodiment, each heating zone may include a metal material that can undergo an exothermic oxidation reaction, and the metal material is used to undergo an exothermic oxidation reaction to provide heat for heating the aerosol-generating matrix. The exothermic oxidation reaction of the metal material refers to: the metal material undergoes an oxidation reaction with oxygen to generate metal oxides and release heat. There is no limit to the way to start the exothermic oxidation reaction. For example, the exothermic oxidation reaction of the metal material can be started by open flame heating, resistance heating, electromagnetic heating, laser heating, microwave heating, friction heat release, etc., so as to heat and atomize the aerosol-generating matrix. It should be noted that once the exothermic oxidation reaction of the metal material is started, there is no need for continuous heat input from the outside, and the chemical reaction between the metal material and oxygen can continue.

[0052] In some embodiments, the metal material is selected from at least one of iron, aluminum, and magnesium.

[0053] The metal material may be a single metal.

[0054] For example, the metal material can be metallic iron composed only of iron elements, which has good thermal conductivity. When the exothermic oxidation reaction of iron is initiated by an open flame or other means, iron reacts with oxygen to generate ferroferric oxide and releases a large amount of heat, so that the heating element 21 can quickly rise to the temperature required for the atomized aerosol generation matrix, and the atomization waiting time is short.

[0055] Alternatively, the metal material may be metallic aluminum consisting only of aluminum elements, which is light in weight, has strong thermal conductivity, and oxidizes faster. When the exothermic oxidation reaction of aluminum is initiated by an open flame or other means, aluminum reacts with oxygen to generate aluminum oxide and generates a large amount of heat.

[0056] Alternatively, the metal material may be metallic magnesium consisting only of magnesium elements, which has good heat dissipation performance. When the exothermic oxidation reaction of magnesium is initiated by an open flame or other means, magnesium reacts with oxygen to generate magnesium oxide and generate a large amount of heat.

[0057] Of course, the metal material can also be an alloy material. For example, the metal material can be a material composed of iron and aluminum. When an open flame or other method is used to start the oxidation reaction of the metal material, the iron-aluminum alloy reacts with oxygen, which can generate sufficient heat while preventing the oxidation rate of the metal material from being too fast, so that the temperature of each heating zone is more suitable.

[0058] Specifically, when in the heat release state, the peak value of the surface temperature of each heating area is between 200° C. and 350° C. This embodiment can improve the heating element's endurance and the curve trend of heat release and temperature rise, reduce the heating temperature of the heating element, and enable the heat source to be delayed over time, which is conducive to extending the aerosol heating time, improving the utilization rate of the aerosol generation matrix, and enhancing the user experience.

[0059] The present application also provides a temperature control method, which specifically achieves the expected temperature control effect by designing the structure of the heating element 21. Specifically, the heating element 21 includes at least two heating zones arranged at intervals, and the heating zones perform exothermic reactions in sequence by heat transfer. The method includes: determining the heating curve of the heating element 21 according to the size and / or number of the heating zones, so that when the heating element 21 acts on the aerosol product, the release sequence and / or release intensity of the active ingredients thereof can be controlled in an intermittent heat release manner.

[0060] Specifically, the length of each heating zone is set according to the condition that the heat generated by each heating zone meets the conditions of maintaining its own exothermic reaction and heating the aerosol product.

[0061] In this embodiment, by controlling the temperature of the heating element 21 by different zones, the heating curve of the heating element 21 can be designed according to the aerosol product, thereby improving the aerosol release and enhancing the user experience.

[0062] Figure 6 The temperature curve of the heating element 21 in the second embodiment of the present application is shown. In the second embodiment, the heating element 21 is not divided into equal length zones, but the first heating zone is shorter than the second heating zone. At this time, its temperature curve has some changes. The main point of the change is that the peak temperature of the first heating zone when heated is significantly lower than the peak temperature of the second heating zone, and the heating time of the first heating zone is significantly shorter than the heating time of the second heating zone, so as to meet the needs of different scenarios.

[0063] Figure 7 The temperature curve of the heating element 21 in the third embodiment of the present application is shown. In the third embodiment, the heating element 21 is not divided into equal-length zones, but the first heating zone is longer than the second heating zone. At this time, its temperature curve has some changes. The main point of the change is that the peak temperature of the first heating zone when heated is significantly higher than the peak temperature of the second heating zone, and the heating time of the first heating zone is significantly longer than the heating time of the second heating zone, so as to meet the needs of different scenarios.

[0064] Figure 8 FIG. 4 shows a schematic diagram of the structure of an aerosol generating article 20 in a fourth embodiment of the present application, wherein: Figure 8 a is a front view of the aerosol generating product 20, Figure 8 b is a side view of the aerosol generating article 20. As shown in the figure, the heating element 21 is in the shape of a short flat cylinder and is axially arranged at the end of the aerosol generating substrate so that the aerosol generating substrate can be heated by heating the end.

[0065] Fig. 9 FIG. 2 shows a schematic diagram of the structure of an aerosol generating article 20 in a fifth embodiment of the present application, wherein: Fig. 9 a is a front view of the aerosol generating product 20, Fig. 9 b is a side view of the aerosol generating article 20. As shown in the figure, the heating element 21 is cylindrical in this embodiment and surrounds the circumference of the aerosol generating substrate so as to heat the aerosol generating substrate by circumferential heating.

[0066] It is understandable that the shape of the heating element 21 and the cooperation with the aerosol generating substrate are not limited to the several situations listed in the above embodiments, and any other suitable regular or irregular shape and the cooperation relationship with the aerosol generating substrate are applicable. In addition, the heating element 21 is not limited to being partitioned in the axial direction, and in some planar aerosol generating products, it can also be partitioned on the plane.

[0067] It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present application, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present application.

Claims

1. A heating element for heating an aerosol-generating substrate, It is characterized in that It comprises at least two heating zones which are arranged adjacent to each other at intervals, wherein the at least two heating zones comprise at least one first heating zone which generates heat first, and at least one second heating zone which generates heat subsequently in sequence.

2. The heating element according to claim 1, It is characterized in that The first heating region generates heat by an exothermic reaction based on the heating of the heating activation component.

3. The heating element according to claim 1 or 2, It is characterized in that The second heating zone generates an exothermic reaction based on the heat generated by the adjacent heating zone that has generated heat to heat the aerosol generating substrate.

4. The heating element according to claim 1, It is characterized in that The total length of the heating element is between 30 mm and 40 mm, and the length of each heating zone is greater than or equal to 2 mm.

5. The heating element according to claim 1 or 4, It is characterized in that The interval between any two adjacent heating areas is less than or equal to 1 mm.

6. The heating element according to claim 1, It is characterized in that The heating element is in at least one of a linear chain, a ring chain, and a hollow column chain.

7. The heating element according to claim 1, It is characterized in that Each of the heat generating areas comprises a metal material, and the metal material is used to produce an exothermic reaction to provide heat for heating the aerosol generating substrate.

8. The heating element according to any one of claims 1 to 7, It is characterized in that When in the exothermic state, the peak value of the surface temperature of each heating zone is between 200° C. and 350° C.

9. An aerosol generating article, It is characterized in that comprising an aerosol generating substrate and a heating element as claimed in any one of claims 1 to 8, wherein the heating element is arranged at the center of the aerosol generating substrate; or The heating element is arranged at the end of the aerosol generating substrate; or The heating element is arranged around the aerosol generating substrate.

10. An aerosol generating system, It is characterized in that The aerosol generating article comprises the aerosol generating article as claimed in claim 9, and a heat-activating component for heating the first heating zone to generate heat.

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