Heating non-combustion device and suction detection method thereof

Abstract

The invention relates to a heating non-combustion device and a suction detection method thereof. The method comprises the following steps: acquiring a preset number of temperature values of a heating body within a preset time length from a current moment through a temperature measuring element; and storing the preset number of temperature values to a preset temperature change window one by one. And judging whether a preset temperature change characteristic condition is met or not according to the temperature change window in which the temperature value is stored. If yes, it is judged that the suction action exists. The smoking behavior is identified by utilizing the temperature change characteristics, the design work of a structure and a control circuit can be effectively reduced, the manufacturing cost is reduced, meanwhile, the defect of detection failure caused by tobacco tar shielding can be avoided, the heating non-combustion device can provide more accurate energy output, and the personalized smoking requirement is met.

Description

Technical Field

[0001] This invention relates to the field of aerosol technology, and in particular to a heating non-combustible device and its suction detection method. Background Technology

[0002] Heated non-combustible devices typically have a fixed power curve, gradually outputting heat according to time points. However, this method cannot adjust the power based on individual vaping habits such as inhalation intensity and duration, thus failing to provide more precise energy output and meet more personalized vaping needs. Generally, inhalation actions can be detected by adding circuit detection devices such as airflow sensors. Once a valid inhalation action is detected, precise energy output can be provided. An inhalation action refers to, for example, the user directly inhaling the aerosol-generated product, causing airflow from the aerosol-generated product to the user's mouth, or the user inhaling the mouthpiece of the heated non-combustible device, causing airflow from the mouthpiece to the user's mouth. However, this method increases the design complexity of the device structure and circuit control scheme, increasing manufacturing costs. Furthermore, with prolonged use, the sensitivity of the detection device may fail due to factors such as e-liquid covering or obstruction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a heating non-combustible device and its suction detection method, in order to address the above-mentioned deficiencies.

[0004] The technical solution adopted by this invention to solve its technical problem is: a suction detection method for a heating non-combustible device, comprising the following steps:

[0005] The temperature sensor acquires a preset number of temperature values ​​of the heating element within a preset time period from the current moment.

[0006] The preset number of temperature values ​​are stored one by one into a preset temperature change window;

[0007] Determine whether the preset temperature change characteristic condition is met based on the temperature change window containing the stored temperature value.

[0008] If so, then a suction action is determined to be present.

[0009] In some embodiments, before the step of determining whether a preset temperature change characteristic condition is met based on the temperature change window, the method further includes:

[0010] All temperature values ​​in the temperature change window are sequentially calculated to determine the difference between adjacent temperature values, and all the resulting temperature differences are stored one by one in a preset difference window.

[0011] The step of determining whether the preset temperature change characteristic condition is met based on the temperature change window includes:

[0012] Determine whether the difference window storing the temperature difference values ​​meets the preset temperature change characteristic condition.

[0013] In some embodiments, the step of determining whether the difference window storing the temperature difference values ​​satisfies the preset temperature change characteristic condition includes:

[0014] The preset temperature change characteristic conditions include:

[0015] First condition: The number of temperature differences less than the first threshold in the difference window is greater than or equal to the first preset number, and the number of temperature differences less than the second threshold in the difference window is greater than or equal to the second preset number; wherein, the second threshold < the first threshold ≤ 0;

[0016] The second condition is that the window position of the maximum temperature difference in the difference window is less than the preset maximum window position, and the window position of the minimum temperature difference in the difference window is greater than or equal to the preset minimum window position.

[0017] The third condition is: the minimum temperature difference in the difference window is less than or equal to the preset minimum temperature difference threshold.

[0018] When all three conditions above are met simultaneously, the difference window storing the temperature difference is determined to satisfy the preset temperature change characteristic condition.

[0019] In some embodiments, the preset time length is greater than or equal to 1 ms; and / or

[0020] The preset quantity is the ratio of the preset time length to the preset sampling period.

[0021] In some embodiments, the preset sampling period is 1 ms interval during which the temperature sensing element detects and records the temperature of the heating element.

[0022] In addition, the present invention also provides a heating non-combustible device, comprising:

[0023] A heating structure for heating an aerosol generating matrix, the heating structure comprising a heating element having a heating part, a tube body sleeved around the outer periphery of the heating part and transmitting infrared light, the tube body being spaced apart from at least a portion of the heating part; the heating part having a heating element;

[0024] A temperature sensing element connected to the controller for detecting the temperature of the heating element;

[0025] A power supply component connected to the heating structure for providing power to the heating structure;

[0026] The controller is configured to execute the steps of the suction detection method for the heated non-combustible device described above by calling a computer program stored in the memory.

[0027] In some embodiments, the heating structure further includes:

[0028] A support member, at least partially installed in the tube body to support the heating element, is arranged sequentially with the heating part along the axial direction of the tube body. The support member has a first end and a second end in the axial direction, the first end being disposed close to the heating part and the second end being disposed away from the heating part.

[0029] The temperature sensing element includes a temperature sensing membrane, which is disposed at the first end of the support member.

[0030] In some embodiments, the temperature-sensing membrane covers a portion of the outer wall of the support member circumferentially; and / or

[0031] The first end has an end face, and the temperature measuring film extends to at least a portion of the end face.

[0032] In some embodiments, the temperature-sensing membrane is in contact with a portion of the inner wall of the tube.

[0033] In some embodiments, a gap is provided between the temperature measuring membrane and the inner wall of the tube;

[0034] The width of the gap is greater than 0 and less than or equal to 0.3 mm.

[0035] In addition, the present invention also provides a heating non-combustible device, comprising:

[0036] A heating element used to heat the aerosol forming matrix;

[0037] A power supply component for providing power to the heating element;

[0038] Temperature sensing element used to detect the temperature of the heating element;

[0039] The controller is configured to:

[0040] The temperature sensor acquires a preset number of temperature values ​​of the heating element within a preset time period from the current moment.

[0041] The preset number of temperature values ​​are stored one by one into a preset temperature change window;

[0042] Determine whether the preset temperature change characteristic condition is met based on the temperature change window containing the stored temperature value.

[0043] If so, then a suction action is determined to be present.

[0044] The heated non-combustible device and its suction detection method of the present invention have the following beneficial effects: The present invention uses temperature change characteristics to identify suction behavior, which can effectively reduce the design work of structure and control circuit, reduce manufacturing costs, and avoid detection failure defects caused by smoke and oil obstruction. It is also conducive to the heated non-combustible device providing more accurate energy output and meeting personalized suction needs. Attached Figure Description

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0046] Figure 1 This is a schematic flowchart of a suction detection method for a heating non-combustible device according to an embodiment of the present invention;

[0047] Figure 2 This is a schematic flowchart of the suction detection method of the heating non-combustible device according to some embodiments of the present invention;

[0048] Figure 3 This is a schematic diagram of the heating structure of the non-combustible heating device in some embodiments of the present invention;

[0049] Figure 4 yes Figure 3 A cross-sectional view of the heating structure shown;

[0050] Figure 5 yes Figure 4 The diagram shows an exploded view of the heating structure.

[0051] Figure 6 yes Figure 5 The diagram shows the cooperation between the support component and the temperature sensing element;

[0052] Figure 7 yes Figure 6 The diagram shows the structure of the temperature sensing element. Detailed Implementation

[0053] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0054] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0055] To facilitate understanding of the present invention, a more complete description will be provided below. The invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be more thorough and complete.

[0056] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. When terms such as "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," and "bottom" are used to indicate orientation or positional relationships, this is based on the orientation or positional relationships shown in the accompanying drawings and is only for ease of description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] It should be understood that although the terms first, second, third, etc., may be used in embodiments of the present invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. No such actual relationship or order between these entities or operations is necessarily required or implied.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0059] refer to Figure 1 In one embodiment of the present invention, the suction detection method of the heated non-combustible device includes the following steps:

[0060] S1. Obtain a preset number of temperature values ​​of the heating element within a preset time period from the current moment through the temperature sensing element.

[0061] S2. Store a preset number of temperature values ​​one by one into a preset temperature change window.

[0062] Understandably, the temperature change window can be set to M milliseconds, and the data interval is N milliseconds / data point. The total number of data points in the window is Num = M / N, where M ≥ 1, and N can be set to 1. Of course, this invention does not impose a specific limitation on this, and it can be adjusted according to actual needs. The heating time is T1, and the temperature is detected at most once every N milliseconds by the temperature sensing element, while storing the Num temperature values ​​within the most recent M milliseconds into the temperature change window.

[0063] S3. Determine whether the preset temperature change characteristic conditions are met based on the temperature change window containing the stored temperature values.

[0064] S4. If so, then it is determined that there is a suction action.

[0065] refer to Figure 2 In some embodiments, before determining whether a preset temperature change characteristic condition is met based on the temperature change window, the method further includes:

[0066] S21. Calculate the difference between adjacent temperature values ​​in the temperature change window in sequence, and store all the temperature differences into the preset difference window one by one.

[0067] The step of determining whether the preset temperature change characteristic conditions are met based on the temperature change window includes:

[0068] S31. Determine whether the difference window storing temperature difference values ​​meets the preset temperature change characteristic conditions.

[0069] In other words, when the number of data in the temperature change window reaches Num (i.e., the preset number), the difference between adjacent temperature values ​​in all temperature change windows is calculated sequentially. Then, it is determined whether the difference window storing the temperature difference meets the preset temperature change characteristic conditions.

[0070] This embodiment utilizes temperature change characteristics to identify vaping behavior, which can effectively reduce the design work of structure and control circuit, reduce manufacturing costs, and avoid detection failure defects caused by e-liquid obstruction. It is also conducive to the heating non-combustion device providing more accurate energy output and meeting personalized vaping needs.

[0071] In one specific implementation, the step of determining whether the difference window storing temperature differences meets the preset temperature change characteristic conditions includes:

[0072] Determine if the following conditions are met simultaneously:

[0073] First condition: The number of temperature differences in the difference window that are less than the first threshold is greater than or equal to the first preset number, and the number of temperature differences in the difference window that are less than the second threshold is greater than or equal to the second preset number. Wherein, the second threshold < the first threshold ≤ 0.

[0074] Second condition: The window position of the maximum temperature difference in the difference window is less than the preset maximum window position, and the window position of the minimum temperature difference in the difference window is greater than or equal to the preset minimum window position.

[0075] The third condition is: the minimum temperature difference in the difference window is less than or equal to the preset minimum temperature difference threshold.

[0076] Understandably, the preset temperature change characteristic condition consists of a first condition, a second condition, and a third condition. If all three conditions are met simultaneously, it is determined that the difference window storing the temperature difference meets the preset temperature change characteristic condition, and thus it is determined that the user is performing a suction action.

[0077] Optionally, the preset time length in this embodiment is greater than or equal to 1 ms. The preset quantity is the ratio of the preset time length to the preset sampling period. The preset sampling period is that the temperature sensing element detects and records the temperature of the heating element once every 1 ms.

[0078] This embodiment uses the three conditions set above to determine the user's suction behavior, which can effectively prevent false judgments in suction detection, reduce the false judgment rate, and help improve the stability of the heating non-combustible device.

[0079] It should be noted that this method is based on the principle of slip-type low-pass filtering to obtain the temperature change window data of the heating non-combustion device during the heating process. The slip-type low-pass filtering principle refers to using the first-in-first-out principle of this principle to store a preset number of temperature values ​​generated in the most recent preset time period in the temperature change window.

[0080] Understandably, the heating temperature of the heating non-combustible device under heating state is detected at most every N milliseconds, and a preset number of temperature values ​​within the most recent M milliseconds are stored in a preset temperature change window; then, the difference between adjacent temperature values ​​within the temperature change window is calculated, and each difference is stored in a preset difference window.

[0081] Next, based on the Schmitt hysteresis filtering principle, the data in the difference window is sampled in real time. The Schmitt hysteresis filtering principle in this invention refers to setting a threshold; when the signal value exceeds this threshold, the output changes state. After the state change, it does not immediately revert to its original state when the signal value falls back below the threshold. Instead, it only changes state when the signal value falls to a lower threshold (called the hysteresis point). The hysteresis filtering principle can reduce frequent state switching caused by noise or small fluctuations. This method sets three judgment conditions based on this principle. Only when the difference window data shows multiple consecutive decreases is a sampling action determined. This effectively prevents false positives in sampling detection, reduces the false positive rate, and thus improves system stability.

[0082] In another embodiment of the present invention, the heating-non-combustible device includes:

[0083] A heating element used to heat the aerosol forming matrix.

[0084] Alternatively, the heating structure with a heating element can be central heating, peripheral heating, infrared heating, microwave heating, etc.

[0085] A power supply component for providing power to the heating element.

[0086] Temperature sensing element used to detect the temperature of the heating element.

[0087] The controller is configured to:

[0088] The temperature sensor acquires a preset number of temperature values ​​of the heating element within a preset time period from the current moment.

[0089] The preset number of temperature values ​​are stored one by one into a preset temperature change window;

[0090] Determine whether the preset temperature change characteristic condition is met based on the temperature change window containing the stored temperature value.

[0091] If so, then a suction action is determined to be present.

[0092] This embodiment utilizes temperature change characteristics to identify vaping behavior, which can effectively reduce the design work of structure and control circuit, reduce manufacturing costs, and avoid detection failure defects caused by e-liquid obstruction. It is also conducive to the heating non-combustion device providing more accurate energy output and meeting personalized vaping needs.

[0093] In another embodiment of the present invention, the heating-non-combustible device includes:

[0094] Heating structure 1 for heating the aerosol-generating matrix, such as Figures 3 to 5 As shown, the heating structure 1 includes a heating element 20 having a heating part 21 and a tube 10 sleeved around the heating part 21 and transmitting infrared light. The tube 10 is spaced apart from at least a portion of the heating part 21. The heating part 21 has a heating element 211.

[0095] A temperature sensing element 40 connected to the controller for detecting the temperature of the heating element 211.

[0096] A power supply component connected to the heating structure 1 for supplying power to the heating structure 1.

[0097] The controller is configured to execute the steps of the suction detection method of the heated non-combustible device as described in the above embodiment by calling a computer program stored in the memory.

[0098] It should be noted that the heat-not-burn device can heat the aerosol-generating matrix using a heat-not-burn method. In some embodiments, the aerosol-generating matrix can be columnar, and can be a solid material in the form of strips, flakes, granules, or integral molding made from the leaves and / or stems of plants (e.g., tobacco). Aroma components can be further added to this solid material. The heat-not-burn device may include a heating structure 1 and a power supply component (not shown). The heating structure 1 can be at least partially inserted into the aerosol-generating matrix and heats the aerosol-generating matrix by radiating infrared light, causing the aerosol-generating matrix to generate aerosols for the user to inhale. The power supply component (not shown) is connected to the heating structure 1 to supply power to the heating structure 1.

[0099] In some embodiments, the heating structure 1 further includes a support member 30, which is at least partially installed in the tube body 10 to support the heating element 20. It is arranged sequentially with the heating part 21 along the axial direction of the tube body 10. The support member 30 has a first end 30a and a second end 30b in the axial direction. The first end 30a is disposed close to the heating part 21, and the second end 30b is disposed away from the heating part 21.

[0100] When powered on, the heating element 20 can rapidly heat up to approximately 1000℃, while the surface temperature of the tube body 10 can be controlled at approximately 350℃. The atomization temperature of the aerosol generating substrate is controlled at 300-350℃, achieving precise atomization of the aerosol generating substrate primarily in the infrared 2-4.75µm and 8-11µm wavelength bands. The tube body 10 covers at least a portion of the heating element 20 and allows infrared light to penetrate into the aerosol generating substrate. The support member 30 can be at least partially installed in the tube body 10 and assembled with the heating element 20, providing support for the heating element 20. The temperature sensing element 40 is at least partially installed in the tube body 10 and positioned on the support member 30, enabling monitoring of the temperature within the tube body 10.

[0101] In some embodiments, the tube 10 can be a quartz glass tube. Of course, it is understood that in other embodiments, the tube 10 is not limited to an infrared-transmitting quartz tube, but can be other window materials that allow light waves to pass through, such as transparent ceramics, diamond, etc.

[0102] In some embodiments, the tube body 10 may cover the outer periphery of a portion of the heating element 20 to form a heating structure, preventing the heating element 20 from directly contacting the aerosol generating substrate. The tube body 10 and the portion of the heating element 20 are spaced apart, and the tube body 10 includes a main body 11 and a pointed tip 12. The main body 11 may be cylindrical and hollow. It is understood that in some other embodiments, the main body 11 is not limited to being cylindrical, but may be cuboid or other shapes. The pointed tip 12 is disposed at one end of the main body 11. By providing the pointed tip 12, it is easy to insert or remove at least a portion of the heating structure 1 into the aerosol generating substrate. The pointed tip 12 may be conical. In some embodiments, a receiving cavity 13 is formed inside the tube body 10. The receiving cavity 13 is a cylindrical receiving cavity and may be non-sealed. When the heating element 20 is installed therein, the receiving cavity 13 does not need to be evacuated or filled with inert gas. In this embodiment, the tube body 10 has a tube opening 14, which is located at one end of the main body 11 away from the tip 12 and communicates with the receiving cavity 13 for the heating element 20 to be installed in the receiving cavity 13.

[0103] In some embodiments, the heating element 20 may include a heating portion 21. The heating portion 21 is disposed in the tube body 10 and is at least partially spaced from the tube wall of the tube body 10. Specifically, the heating portion 21 may be spaced from the tube wall of the main body 11 as a whole, and can radiate infrared light when energized. The infrared light can pass through the tube body 10 to the aerosol generating matrix. In some embodiments, the heating portion 21 is generally columnar or cylindrical, and may be generally helical columnar, formed by winding at least one infrared-radiating heating element 211. The heating portion 21 is provided with a central rod 212, which is coaxially disposed with the heating portion 21 and can extend from both ends of the heating portion 21 and connect to one end of the heating portion 21 facing the pointed tip 12. In some embodiments, the central rod 212 may be a conductor or a resistive heating element.

[0104] The heating element 20 may include a first electrical connection portion 22 and a second electrical connection portion 23. Both the first electrical connection portion 22 and the second electrical connection portion 23 are located at the end of the heating element 21 away from the pointed tip 12 and can extend through the opening 14. The first electrical connection portion 22 can be connected to the central rod 212, and the second electrical connection portion 23 can be connected to the end of the heating element 21 away from the pointed tip 12. The first electrical connection portion 22 and the second electrical connection portion 23 can be conductive wires or conductive posts, etc. The first electrical connection portion 22 can be welded to the central rod 212, and the second electrical connection portion 23 can be welded to one end of the heating element 211.

[0105] In some embodiments, the support member 30 may be columnar and may be at least partially installed from the port 14 into the tube body 10, supporting and fixing the heating element 20. In some embodiments, the support member 30 may be disposed near the port 14 and sequentially disposed with the heating element 21 along the axial direction of the tube body 10. In some embodiments, the support member 30 may be an integral insulating member, used to insulate the first electrical connection 22 and the second electrical connection 23. The support member 30 may be made of ceramic, quartz, or high-temperature resistant plastic. The cross-section of the support member 30 is generally circular, and its outer diameter may be equivalent to the inner diameter of the tube body 10. In some embodiments, the support member 30 has a first end 30a and a second end 30b. The first end 30a and the second end 30b are disposed opposite each other and located axially on the support member 30. The first end 30a may be disposed near the heating element 21, and the second end 30b may be disposed away from the heating element 21, located on the outer side of the tube body 10.

[0106] In some embodiments, a first channel 31 may be provided on the support member 30, which extends along the axial direction of the support member 30 from a first end 30a to a second end 30b. The first channel 31 may be defined by a central through-hole in the support member 30. The first channel 31 can be used for the passage of the first electrical connection portion 22. In some embodiments, the first channel 31 may be omitted. The first channel 31 can be used to fix the first electrical connection portion 22 to the support member 30 by applying adhesive, preventing displacement of the heating element 20 during assembly.

[0107] In some embodiments, a second channel 32 may be provided on the support member 30. This second channel 32 extends axially from the first end 30a to the second end 30b of the support member 30, and may be radially spaced from the first channel 31. The second channel 32 can be used for the passage of the second electrical connection portion 23. The second channel 32 may be defined by a through-slot formed on the side wall of the support member 30. The second channel 32 can be used to fix the second electrical connection portion 23 to the support member 30 by applying adhesive, preventing displacement of the heating element 20 during assembly.

[0108] like Figure 6 and Figure 7As shown, in some embodiments, the temperature sensing element 40 may include a temperature sensing film 41. This temperature sensing film 41 may be a TCR temperature sensing film. It should be noted that TCR refers to temperature coefficient resistance, and a TCR temperature sensing film can be made of a material with a high temperature coefficient resistance. The temperature sensing film 41 is disposed at the first end 30a of the support member 30, and can be used to monitor the temperature in the tube body 10, improving the sensitivity and accuracy of temperature measurement. Specifically, the temperature sensing film 41 may cover a portion of the outer wall of the support member 30 along its circumference. Specifically, in some embodiments, it may be formed on the support member 30 using processes such as PVD or printing. In some embodiments, the first end 30a of the support member 30 has an end face, and the temperature sensing film 41 may extend to at least a portion of the end face of the first end 30a, that is, the end face of the first end 30a may be covered by the temperature sensing film 41. The temperature sensing film 41 may contact a portion of the inner wall of the tube body 10, that is, the outer periphery of the temperature sensing film 41 may be in contact with the inner wall of the tube body 10 and its opposite side. In some other embodiments, the temperature measuring membrane 41 may also have a gap between it and at least a portion of the inner wall of the tube 10, the width of which may be greater than 0 and less than or equal to 0.3 mm.

[0109] The temperature sensing element 40 may include two conductive units 42, which are spaced apart circumferentially from the temperature sensing film 41 and both connected to the film. Each conductive unit 42 may be at least partially disposed on the support member 30 and extend along the axial direction of the support member 30. The two conductive units 42 may be insulated from each other by the support member 30. In some embodiments, each conductive unit may include a first conductive portion 421 and a second conductive portion 422, which may be two conductive elements made of different materials. The first conductive portion 421 may be disposed on the surface of the support member 30, with one end connected to the temperature sensing film 41 and the other end extending to the second end 30b of the support member 30. In some embodiments, the first conductive portion 421 may be a conductive sheet or conductive film covering the support member 30, such as a copper sheet or copper foil; or a conductive coating, such as a conductive metal coating, applied to the outer wall of the support member 30. The second conductive portion 422 can be connected to the first conductive portion 421 and can be columnar, extending from the opening 14 to the outside of the tube body 10. The second conductive portion 422 can be a conductive wire or a conductive post. In some other embodiments, the first conductive portion 421 or the second conductive portion 422 of the conductive unit 42 can be omitted, that is, the conductive unit 42 can be a single conductive element.

[0110] In some embodiments, the heating structure 1 further includes a fixing flange 50, which is sleeved on the end of the tube body 10 having the opening 14 and on the section of the support member 30 extending out of the tube body 10, supporting both the tube body 10 and the support member 30. A limiting step 51 is provided inside the fixing flange 50, and the end of the tube body 10 having the opening 14 can abut against the limiting step 51. The tube body 10 and the fixing flange 50 can be bonded and fixed together by a first adhesive 60. The first adhesive 60 can be a paste-like adhesive, which serves to fix and seal. The gap between the support member 30 and the inner wall of the fixing flange 50 is less than or equal to 0.2 mm. In some embodiments, the support member 30 and the fixing flange 50 can be bonded and fixed together by a second adhesive 70. The second adhesive 70 can be a paste-like adhesive, which also serves to fix and seal.

[0111] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0112] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0113] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method of puff detection for a heat-not-burn device, the method comprising: The method comprises the following steps: obtaining a preset number of temperature values of the heat generating body within a preset time length from the current time through the temperature measuring element; storing the preset number of temperature values one by one into a preset temperature change window; determining whether a preset temperature change characteristic condition is met according to the temperature change window storing the temperature values; if yes, it is determined that there is a puffing action.

2. The puff detection method of a heat-not-burn device according to claim 1, wherein, Before the step of determining whether the preset temperature change characteristic condition is met according to the temperature change window, the method further comprises: calculating the difference between adjacent temperature values in the temperature change window in sequence, and storing all the obtained temperature differences one by one into a preset difference window; in the step of determining whether the preset temperature change characteristic condition is met according to the temperature change window, the method comprises: determining whether the difference window storing the temperature differences meets the preset temperature change characteristic condition.

3. The puff detection method of a heat-not-burn device according to claim 2, characterized by, in the step of determining whether the difference window storing the temperature differences meets the preset temperature change characteristic condition, the method comprises: the preset temperature change characteristic condition comprises: a first condition: the number of temperature differences less than a first threshold in the difference window is greater than or equal to a first preset number, and the number of temperature differences less than a second threshold in the difference window is greater than or equal to a second preset number; wherein the second threshold is less than the first threshold and less than or equal to 0; a second condition: the window position of the maximum temperature difference in the difference window is less than a preset maximum window position, and the window position of the minimum temperature difference in the difference window is greater than or equal to a preset minimum window position; a third condition: the minimum temperature difference in the difference window is less than or equal to a preset minimum temperature difference threshold; when the above three conditions are met at the same time, it is determined that the difference window storing the temperature differences meets the preset temperature change characteristic condition.

4. The puff detection method of the heat-not-burn device according to any one of claims 1 to 3, characterized in that: the preset time length is greater than or equal to 1 ms; and / or the preset number is the ratio of the preset time length to a preset sampling period.

5. The puff detection method of a heat-not-burn device according to claim 4, wherein the preset sampling period is that the temperature measuring element detects the temperature of the heat generating body every 1 ms and records it.

6. A heat-not-burn device, characterized in that comprise: a heat generating structure (1) for heating an aerosol generating substrate, the heat generating structure (1) comprising a heat generating element (20) having a heat generating portion (21), a tube body (10) sleeved on the outer periphery of the heat generating portion (21) and transparent to infrared light, the tube body (10) being arranged in a spaced manner with at least part of the heat generating portion (21); the heat generating portion (21) has a heat generating body (211); a temperature measuring element (40) connected with a controller and used for detecting the temperature of the heat generating body (211); a power supply assembly connected with the heat generating structure (1) and used for providing power supply to the heat generating structure (1); the controller is configured to execute the steps of the puff detection method of the heat-not-burn device according to any one of claims 1 to 5 by calling a computer program stored in a memory.

7. The heat-not-burn device of claim 6, wherein, the heat generating structure further comprises: A support member (30) is arranged in the tube body (10) to support the heating element (20) and is arranged in sequence with the heating portion (21) along the axial direction of the tube body (10). The support member (30) has a first end (30a) and a second end (30b) along the axial direction. The first end (30a) is arranged close to the heating portion (21), and the second end (30b) is arranged away from the heating portion (21). The temperature measuring element (40) comprises a temperature measuring film (41). The temperature measuring film (41) is arranged at the first end (30a) of the support member (30).

8. The heat-not-burn device of claim 7, wherein, The temperature measuring film (41) is wrapped around the outer wall of part of the support member (30) along the circumferential direction of the support member (30); and / or The first end (30a) has an end face. The temperature measuring film (41) extends to at least part of the end face.

9. The heat-not-burn device of claim 7, wherein, The temperature measuring film (41) is in contact with part of the inner wall of the tube body (10).

10. A heat-not-burn device, characterized in that Comprise: a heating element for heating an aerosol-forming substrate; a power supply assembly for providing power supply to the heating element; a temperature measuring element for detecting the temperature of the heating element; a controller, and the controller is configured to: acquire, by the temperature measuring element, a preset number of temperature values of the heating element within a preset time length from the current time; store the preset number of temperature values one by one to a preset temperature change window; determine whether a preset temperature change characteristic condition is met according to the temperature change window in which the temperature values are stored; if yes, it is determined that there is a puffing action.

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