Heating assembly and aerosol generating device

Abstract

The utility model discloses a heating assembly and an aerosol generating device, and the aerosol generating device comprises a power supply, a heating assembly and a heating assembly, a control system; a heater; the power supply, the control system and the heater are electrically connected, and the control system is arranged in the aerosol generating device and is configured to be capable of controlling power supply of the power supply to the heater; the heater is used for heating an aerosol-generating article in the aerosol-generating device to form aerosol smoke, and at least comprises a heating-detecting module.

Description

Technical Field

[0001] The utility model relates to the technical field of novel tobacco, in particular to a heating component and an aerosol generating device. Background Art

[0002] The main components of aerosols in aerosol-generating products are water and propylene glycol. Affected by the processing technology, the quality of tobacco filled in each aerosol-generating product is not uniform and there are differences; the addition ratio of aerosol-generating products of different brands also varies greatly; affected by the humidity of the workshop during the production process, the aerosols in aerosol-generating products also vary; aerosol-generating products after opening are also susceptible to moisture, thereby changing the aerosols therein. For the above reasons, there are large differences in the aerosol content between various aerosol-generating products. At present, there is also a lack of means in the device to detect whether aerosol-generating products are damp, whether they have been used, and the degree of use.

[0003] Most existing aerosol generating devices heat according to a pre-set temperature curve. However, there are differences in the original aerosol content of different aerosol generating products, and consumers' puffing habits, such as the puffing time of each puff and the strength of the puff, also vary. In addition, during the puffing process, the amount of aerosol will gradually decrease as the effective ingredients in the aerosol generating product are consumed, which is a dynamically changing parameter. Therefore, the amount of aerosol varies greatly and varies between different aerosol generating products and even between different puffs of the same aerosol generating product. It is difficult to meet the consistency of puffing of aerosol generating products in different states through a predetermined heating temperature curve. There is currently a method of placing a humidity sensor in the device, but this operation will increase the overall complexity of the device and the measurement accuracy is low.

[0004] In addition, many brands of aerosol generating devices currently lack the function of puff counting, and can only ensure that users do not inhale excessively by limiting the puffing time to a relatively short time. Even if they have the function of puff counting, the puff counting detection method they use mainly relies on a temperature sensor to detect whether the temperature drops to a certain level to detect the smoking action, or a built-in airflow sensor is used for feedback. The above-mentioned puff counting method is not very sensitive and is easily affected by environmental airflow disturbances. It has large statistical errors and will cause the structure of the aerosol generating device to be further complicated and larger in size, which is contrary to the development trend of the device to be portable and flexible. Utility Model Content

[0005] The utility model aims to provide a heating component and an aerosol generating device, which are used to provide the status information of the aerosol generating product in real time and accurately.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A heating component that can be used in an aerosol generating device, the heating component can heat an aerosol generating product contained in the aerosol generating device, the heating component includes a substrate and a heating-detection module, the heating-detection module is arranged on the substrate, wherein the heating-detection module includes a conductive heating element and a capacitive detection element, and the heating-detection module can detect the suction condition of the aerosol generating product.

[0008] Furthermore, the conductive heating elements and the capacitive detection elements are staggeredly distributed so that the heating-detection module constitutes an interdigital capacitor.

[0009] Further, one or more heating-detection modules are arranged around the circumference of the substrate.

[0010] Further, at least one of the heating-detection modules can be independently controlled.

[0011] Furthermore, the capacitance detection element includes at least one capacitance finger unit.

[0012] Furthermore, the capacitor finger unit includes a plate and a connection terminal.

[0013] Furthermore, at least one plate member is connected via a connecting end to form a capacitance detection member, and a conductive heating member is provided between at least one group of adjacent capacitance finger units.

[0014] Furthermore, the conductive heating element comprises at least one resistive interdigital unit.

[0015] Furthermore, at least one resistor finger unit is connected in series to form a conductive heating element.

[0016] Furthermore, each resistor finger unit includes a first heating track and a second heating track.

[0017] Furthermore, the first heating track and the second heating track are connected in series, and an electrical insulation space is formed between the first heating track and the second heating track.

[0018] Furthermore, after the heating-detection module is laid flat, the conductive heating element satisfies:

[0019] 0.01mm≤E≤100mm and / or 0.01mm≤H≤100mm;

[0020] Wherein, E is the total length of the conductive heating element along the axial N direction, and H is the total width of the conductive heating element perpendicular to the N direction.

[0021] Furthermore, the conductive heating element further satisfies:

[0022] 0.01mm≤w≤50mm and / or 0.01mm≤b≤50mm;

[0023] Wherein, w is the width of a single resistor finger unit, and b is the interval width between the resistor finger units.

[0024] Furthermore, the heating component is of internal heating or external heating type.

[0025] Furthermore, the conductive heating element and the capacitance detection element are arranged on the substrate.

[0026] Furthermore, the substrate is rolled or laid on the base.

[0027] An aerosol generating device can heat an aerosol generating product by resistive heating to generate an aerosol for a user to inhale. The aerosol generating device comprises: a power supply, a control system and a heating component. The power supply, the control system and the heating component are electrically connected to each other. The control system is configured to obtain a capacitance value of a heating-detection module, thereby detecting the inhalation condition of the aerosol generating product.

[0028] Furthermore, the aerosol generating device satisfies:

[0029] W=αC-β (1)

[0030] Wherein, W is the residual aerosol content, C is the real-time capacitance of the heating-detection module, and the parameters α and β are measured in the following manner: multiple aerosol generating product samples are placed in an aerosol generating device, heated for a predetermined time and inhaled once, and the weight of the aerosol generating product after each inhalation and the capacitance value after each inhalation are recorded. The difference between the weight of the aerosol generating product after each inhalation and the weight of the aerosol generating product after the final inhalation is the residual aerosol content W of the aerosol generating product after each inhalation. The measurement data is recorded, and the parameters α and β are obtained after fitting the residual aerosol content W with the real-time capacitance C.

[0031] Capacitors can be divided into parallel plate capacitors and non-parallel plate capacitors according to the positional relationship between their plates. Figure 8a The figure shows a schematic diagram of a parallel plate capacitor. The parallel plate capacitor can detect the capacitance value of the test piece placed in its electric field line. Figure 8bThe figure shows a schematic diagram of a non-parallel plate capacitor. The non-parallel plate capacitor sensor is a sensor based on the capacitor edge effect, which is equivalent to rotating a set of plates of a parallel plate capacitor to different planes. The two metal plates are called the sensing plate and the driving plate respectively. The specific working principle of the non-parallel plate capacitor is as follows: when a certain voltage excitation signal is given to the driving plate, an electric field will appear between the two plates. When the object to be tested is close to the capacitor, the electric field lines penetrate the test piece. When there is a test piece in the sensor measurement area, an induced electric displacement field will be generated inside the test piece, which will affect the charge distribution on the capacitor electrode, resulting in a change in the capacitance value between the excitation and sensing electrodes. This change can be used to evaluate the dielectric properties of the material to be tested, such as dielectric constant, conductivity and other parameters, and form a corresponding capacitance value between the sensing plate and the driving plate. The theoretical formula of the non-parallel plate capacitor is as follows:

[0032]

[0033] Where C is the capacitance value and ε is the dielectric constant between the capacitor plates. Figure 3 As shown, the distances from the two ends of the plate to the intersection O are R1 and R2 respectively, and the length of the plate is L. After the capacitor is designed, L, θ, R1, and R2 are all fixed, and the capacitive sensor realizes measurement by sensing the change of the dielectric constant of the medium.

[0034] In general, the relative dielectric constant ε of air is 1, the relative dielectric constant ε of water is 80, the relative dielectric constant ε of glycerol is 47, the relative dielectric constant ε of glycerol is 43.5, and the relative dielectric constant ε of dry biomass is between 2-4. There are huge differences in the relative dielectric constants of the above substances. The aerosol-forming matrix may include a single aerosol former. Alternatively, the aerosol-forming matrix may include a combination of two or more aerosol formers. Suitable aerosol formers are known in the art, and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butylene glycol and glycerol; esters of polyols, such as monoacetyl glycerol, diacetyl glycerol or triacetyl glycerol; and aliphatic esters of monobasic, dibasic or polybasic carboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and most preferably glycerol. Thus, at least part of the components of the aerosol-generating article may form a dielectric material. The residual aerosol content that can be smoked in the aerosol-generating article may be characterized by measuring the dielectric constant after insertion into the aerosol-generating article. Preferably, the aerosol-forming substrate has an aerosol former content of greater than 5% by dry weight. More preferably, the aerosol-forming substrate may have an aerosol former content of between about 5% and about 30% by dry weight.

[0035] Preferably, the conductive heating element is a material with good heating performance, including but not limited to: suitable metal materials or metal alloy materials; semiconductors, such as doped ceramics, "conductive" ceramics, carbon, graphite, and composite materials made of ceramic materials and metal materials. Suitable metal and metal alloy materials include but are not limited to silver paste, silver palladium paste, tungsten, stainless steel, nickel, cobalt, chromium, aluminum, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese and iron and alloys of the above materials.

[0036] Preferably, the capacitance detection element may be made of metal material, or may be a flexible or electroplated plate, or may be a wire.

[0037] Preferably, the substrate may be made of ceramic material (such as alumina, zirconia, etc.), which has fast heat conduction and high heating efficiency.

[0038] Preferably, the substrate 130 can use a polymer insulating material as the raw material of the substrate 130, preferably polyimide (PI). Polyimide is a high-performance engineering plastic that can provide good electrical and mechanical properties, and has high temperature tolerance and chemical stability. The substrate 130 is made into a thin film substrate using polyimide, so that the capacitor formed by the heating-detection module 100 is a thin film capacitor as a whole. The thin film capacitor has a small size that makes it suitable for microelectronic devices; it has high stability, and the thin film material is not easy to change the capacitance value during long-term use, and has the advantages of low loss, high insulation, and high temperature resistance.

[0039] This patent proposes a heating-detection module and the application of the detection module. A capacitor plate is added to the heating element, which is crossed with the conductive heating element to form an interdigital capacitor structure. The content of the inhalable aerosol in the aerosol generating product can be detected in real time, and the remaining inhalable aerosol content can be accurately fed back, so that the aerosol generating device can achieve precise control of the heating power for different aerosol generating products or different states of the same aerosol generating product, thereby ensuring the consistency of the aerosol generation amount. In addition, by detecting the aerosol consumption, the use parameters such as the number of puffs can be accurately characterized in real time and fed back to the user. In addition, the puff volume per puff can be calculated through the above data, and real-time adjustments can be made to improve the uniformity of the puffing experience, and the system has a simple structure and a small size. Moreover, the structure does not require the introduction of any additional dedicated airflow and humidity measurement sensors. The detection is achieved only through the design of the heating-detection module. It is small in size, simple in structure, and accurate in detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above content and the following specific embodiments of the present invention will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection.

[0041] Figure 1 This is a schematic diagram of the heating-detection module in a flattened state;

[0042] Figure 2 is a schematic structural diagram of the heater 10 in Example 1;

[0043] Figure 3 Schematic diagram of the electric field line distribution of the radial cross section of the heater 10 in Example 1;

[0044] Figure 4 It is a schematic structural diagram of the heater 10' in Example 2;

[0045] Figure 5 Schematic diagram of electric field line distribution in the circumferential heating cross section of the heater 10' in Example 2;

[0046] Figure 6 Schematic diagram of the capacitance change of the aerosol-generating product during the actual measurement of the puffing process;

[0047] Figure 7 A schematic diagram of calibration data recording for an aerosol generating device;

[0048] Figure 8a It is a schematic diagram of the electric field lines of a parallel plate capacitor;

[0049] Figure 8b Schematic diagram of the electric field lines of a capacitor with non-parallel plates at a certain angle.

[0050] The reference numerals are described as follows:

[0051] Heating element: 10; 10'

[0052] Conductive heating element: 11

[0053] Capacitor detection parts: 12

[0054] Aerosol-generating products: 90

[0055] Heating-detection module: 100

[0056] Resistor interdigital unit: 110

[0057] First fever track: 111

[0058] Second fever trajectory: 112

[0059] Capacitor finger unit: 120

[0060] Plate parts: 121

[0061] Connection port: 122

[0062] Substrate: 130

[0063] Electrical insulation space: 140

[0064] Heating chamber: 200

[0065] Base: 300; 300'

[0066] The width of the gap between the resistor interdigital units: b

[0067] Sensor capacitance: C

[0068] Initial capacitance: C0

[0069] Maximum capacitance: C MAX

[0070] The corresponding capacitance value of the aerosol generated by the first inhalation is: C1 The corresponding capacitance value of the aerosol generated by the second inhalation is: C2 The corresponding capacitance value of the aerosol generated by the third inhalation is: C3 The corresponding capacitance value of the aerosol generated by the fourth inhalation is: C4 The corresponding capacitance value of the aerosol generated by the fifth inhalation is: C5 The corresponding capacitance value of the aerosol generated by the sixth inhalation is: C6 The corresponding capacitance value of the aerosol generated by the seventh inhalation is: C7 The corresponding capacitance value of the aerosol generated by the eighth inhalation is: C8 The total length of the conductive heating element along the axial direction: E

[0071] Width of a single capacitor finger unit: g

[0072] Total width of conductive heating element: H

[0073] Circumferential direction: N

[0074] Width of a single resistor finger unit: w

[0075] Residual aerosol content of cigarette: W

[0076] Standby phase: x

[0077] Insertion phase: y

[0078] Warm-up phase: DETAILED DESCRIPTION

[0079] The detailed features and advantages of the present invention are described in detail in the specific implementation modes below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. According to the description, claims and drawings disclosed in this specification, the technical personnel in this field can easily understand the relevant purposes and advantages of the present invention.

[0080] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0081] In the description of this embodiment, it should be noted that the terms "far", "near", etc., indicating directions or positional relationships, are defined with reference to the user's mouth end, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0082] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0083] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0084] Figure 1 Schematic diagram of the heating-detection module 100 in a flattened state. As shown in the figure, the heating-detection module 100 after being laid out is rectangular in shape as a whole. The heating-detection module 100 comprises a conductive heating element 11 and a capacitive detection element 12, wherein the conductive heater is preferably a resistance heater, and the conductive heating element 11 and the capacitive detection element 12 are arranged on a substrate 130, and the substrate 130 is made of an insulating material. The conductive heating element 11 is configured to generate heat after being energized to heat the aerosol generating product 90 contained in the aerosol generating device, and the capacitive detection element 12 is configured to form at least one set of sensing plates and driving plates with the corresponding conductive heating element 11, thereby forming a capacitor.

[0085] exist Figure 1 In the schematic diagram of the flattened state of the single heating-detection module 100 shown, the overall structure of the capacitor detection member 12 is approximately comb-shaped, and the conductive heating member 11 extends along the gaps between the comb teeth of the capacitor detection member 12 to form a heating track. Under this structure, the capacitor detection member 12 and the conductive heating member 11 form a finger-shaped capacitor. The finger-shaped capacitor has high precision and high sensitivity. The sensing plate and the driving plate are arranged in a cross-finger arrangement, and an electric field can be formed between the fingers. The distance between the fingers is short and the electric field strength is high. Compared with the traditional arrangement of parallel plate electrodes, the sensitivity and precision are also higher.

[0086] Optionally, the substrate 130 can use a polymer insulating material as the raw material of the substrate 130, preferably polyimide (PI). Polyimide is a high-performance engineering plastic that can provide good electrical and mechanical properties, and has high temperature tolerance and chemical stability. The substrate 130 is made into a thin film substrate using polyimide, so that the capacitor formed by the heating-detection module 100 is a thin film capacitor as a whole. The thin film capacitor has a small size and is suitable for microelectronic devices; and polyimide has high stability, and the thin film material is not easy to change the capacitance value during long-term use, and has the advantages of low loss, high insulation, and high temperature resistance.

[0087] Each comb-tooth portion of the capacitance detection member 12 forms a capacitance interdigital unit 120. Specifically, Figure 1 As shown, the capacitance detection element 12 is composed of a plurality of capacitance interdigital units 120 ; the conductive heating element 11 is composed of a plurality of resistance interdigital units 110 , specifically, each portion extending in a winding manner in the gap between the teeth of the capacitance detection element 12 constitutes a single resistance interdigital unit 110 .

[0088] Furthermore, the capacitor interdigital unit 120 includes a plate 121 and a connection end 122, and each plate 121 is connected together through the connection end 122; the resistor interdigital unit 110 includes a first heating track 111 and a second heating track 112, and the first heating track 111 and the second heating track 112 are connected in series, and an electrical insulation space 140 is provided between the first heating track 111 and the second heating track 112. Specifically, the electrical insulation space between the first heating track 111 and the second heating track 112 is a laser-engraved groove or an etched groove formed by chemical etching, or it can be a portion that is protected and does not form a metal layer during the deposition of the first heating track 111 and the second heating track 112.

[0089] The circuit of the heating-detection module 100 is as follows: the conductive heating element 11 is formed by a plurality of resistor finger units 110 connected in series, and the two ends of the conductive heating element 11 respectively include leads L1 and L2. After power is turned on, a loop is formed in the conductive heating element 11; the lead L3 is electrically connected to the connection end 122 so as to power the capacitor detection element 12. One end of each electrode element 121 is connected to each other through the connection end 122, and the other end is independent of each other, and an insulating space 140 is set between each other. It is easy to understand that the capacitor detection element does not form a loop.

[0090] By connecting the capacitance processing module (not shown) to any one of the leads L1 or L2 and to the lead L3, the capacitance formed by the components between the leads connected to the capacitance processing module or physical quantities related to capacitance can be measured.

[0091] Specifically, the conductive heating element 11 can meet the following dimensions:

[0092] 0.01mm≤E≤100mm and / or 0.01mm≤H≤100mm

[0093] Wherein, E is the total length of the conductive heating element 11 along the axial N direction, and H is the total width of the conductive heating element 11 perpendicular to the N direction.

[0094] Specifically, the resistor finger unit 110 is configured as an elongated rectangle along the N direction and is formed by slotting in the axial direction at the center.

[0095] Specifically, the size of a single resistor finger unit 111 satisfies:

[0096] 0.01mm≤w≤50mm and / or 0.01mm≤b≤50mm;

[0097] And, 0.02mm≤e≤20mm;

[0098] Wherein, w is the width of a single resistor finger unit 111; b is the interval width between the resistor finger units 111; and e is the width of the slot.

[0099] Specifically, the pole plate 121 is an elongated rectangle along the axial direction, and has a width of g;

[0100] It is easy to understand that due to the intersecting configuration relationship, g ≤ b;

[0101] It is easy to understand that the groove forms an electrical insulation space 140 , and the rectangular conductive material is divided into a first heating track 111 and a second heating track 112 through the groove cutting process.

[0102] Example 1 - Heating needle heating assembly

[0103] Figure 2 This is a schematic diagram of the structure of the heating component 10 in Example 1. The heating component 10 is a needle-type internal heater, which is formed by at least one heating-detection module 100 wrapped around the outer surface of a needle-shaped heating substrate 300. The heating-detection module 100 can also be directly processed on the needle-shaped heating substrate 300.

[0104] In use, at least a portion of the heating assembly 10 is inserted into the aerosol generating article 90. When power is supplied to the heating assembly 10, a Figure 3 The electric field lines (detection lines) of the capacitor are arc lines from a single resistor interdigital unit 110 (excitation electrode) to a single capacitor interdigital unit 120 (detection electrode). The detection area is the periphery of the heating component 10. The electric field lines pass through the interior of the aerosol generating product 90. According to the working principle of the capacitor described above, the aerosol content that can be inhaled in the aerosol generating product 90, the number of puffs, and other data related to the capacitance and the puffing process can be detected.

[0105] Example 2 - Cylindrical Heating Component

[0106] Figure 4Schematic diagram of the structure of the heating component 10' in Example 2. The heating component 10' is a cylindrical heater, which is formed by at least one heating-detection module 100 attached to the surface of a cylindrical heating substrate 300'. The heating-detection module 100 can also be directly processed on the heating substrate 300'. Optionally, the heating-detection module 100 can also be attached to the inner surface of the heating substrate 300'. A heating cavity 200 is formed inside the cylindrical heating substrate 300' for accommodating the aerosol generating product 90. When in use, at least a portion of the aerosol generating product 90 is inserted into the heating cavity 200 for heating.

[0107] Figure 5 is a schematic diagram of the electric field line distribution of the circumferential heating cross section of the heater 10' in Example 2, Figure 5 It can be seen that the heating assembly 10' in Example 2 is surrounded by four heating-detection modules 100 to form a complete cylindrical shape. It is easy to understand that each heating-detection module 100 covers an angle of about 90°, and electric field lines (detection lines) can be formed between the capacitive interdigital units 120 and the resistive interdigital units 110 on each heating-detection module 100.

[0108] Optionally, the heating component 10' can also be used in conjunction with the heating component 10 in Example 1 to form an internal and external heating heater.

[0109] Construction of capacitance value and aerosol content function model:

[0110] Figure 6 The figure is a schematic diagram of the capacitance change of the aerosol generating article 90 during the actual puffing process; the vertical axis is the capacitance value and the horizontal axis is the time. The figure shows the entire process of actually puffing when the above-mentioned heating component is applied to the aerosol generating device.

[0111] In this figure, x is the standby stage. In this process, since no aerosol generating product 90 is inserted, the object to be tested is equivalent to air. According to the above formula (2), the relative dielectric constant of air is about 1. Therefore, the initial capacitance C0 is at the lowest level at this time.

[0112] y is the insertion stage of the aerosol generating product 90. Due to the aerosol forming agent contained in the aerosol generating product 90, for example, glycerol, since the relative dielectric constant of glycerol is 47, when substituted into formula (2), under the premise that other parameters of the capacitor remain unchanged, the capacitance value increases significantly to C MAX .

[0113] Stage z is the preheating stage, during which the capacitance value fluctuates due to temperature changes.

[0114] With the first puff, a certain amount of aerosol former is lost, causing the capacitance to drop to C1. As the puff continues, the aerosol former is continuously lost, ε continues to decrease, and the capacitance value shows a decreasing trend of C1→C2→C3→C4→C5→C6→C7→C8 until the end of the puff.

[0115] Before actual use, the capacitor in the heating component needs to be calibrated to determine the functional relationship between the capacitance and the residual aerosol content of the cigarette. This functional relationship can be used as an important basis for subsequently calculating the residual aerosol content of the cigarette.

[0116] Figure 7 The data diagram of capacitor calibration is shown in Figure 1. By measuring samples with different residual aerosol contents, the corresponding functional relationship between the capacitance value and the aerosol content value is fitted. The specific calibration process is as follows: Use the heating component to heat the aerosol generating product 90, heat it for 30 seconds and take a puff once, and record the weight of the aerosol generating product 90 after each puff, as well as the capacitance value after each puff, and calculate the weight of the aerosol generating device 90 after each puff minus the weight of the aerosol generating device 90 after the puff is completed, and record the measurement results as follows: Figure 7 The calibration results show that the capacitance value C increases with the increase of the residual aerosol content. Within this measurement range, there is an approximate linear relationship between the capacitance value and the residual aerosol content of the cigarette. The function model between the two is fitted as follows:

[0117] W=αC-β (1)

[0118] Where W is the residual aerosol content of the cigarette (in g), and C is the sensor capacitance (in pF). In the experiment, the commercially available HOO brand original heated cigarettes were tested and the results were obtained. Figure 7 The data in the figure have coefficients α and β of approximately 0.0379 and 0.1525 after fitting, and the correlation coefficient R 2 =0.9803, which is a function model with obvious linear characteristics. The sensor calibration method is simple and easy to operate, and can be applied to cigarette capacitance sensors of any structural size.

[0119] Aerosol generating device control method:

[0120] This patent provides a method for controlling an aerosol generating device. For an aerosol generating device using a heating component with a heating-detection module, the control system sets a first threshold, a second threshold, and a third threshold at the factory, and sets a range of aerosol content per puff, the upper limit of which is a fourth threshold and the lower limit is a fifth threshold. The above threshold data can also be obtained through a network connection during use or directly read from the aerosol generating product 90 itself, the outer packaging, or related promotional materials.

[0121] like Figure 6 As shown, after the aerosol generating device is started, when the control system detects that the aerosol content increases instantaneously and exceeds the first threshold, it is considered that the aerosol generating article 90 is inserted, and power is supplied to the heating component to start the aerosol generating device, and the control system records the puff data. The puff data can specifically record the number of puffs, the aerosol content consumed puff by puff, the real-time remaining aerosol content, etc.

[0122] During the heating process, if the capacitance value detected in a short period of time decreases rapidly, and the rate of decrease V is higher than the preset second threshold value, for example, from C1 to C2, C2 to C3, it is regarded as one puff. When the puff action is identified, the puff data is recorded. For example: the number of puffs, the weight of the aerosol generating substance consumed by the number of puffs, etc. can be recorded. With each puff, the capacitance value C gradually decreases. Substituting the capacitance value after inserting the aerosol generating product 90 into formula (1) for calculation, the remaining puff aerosol content of the aerosol generating product 90 can be obtained. Substituting the capacitance difference before and after puffing into formula (1) for calculation, it is the aerosol content consumed by the puff. The capacitance after puffing is substituted into formula (1) to calculate the residual aerosol content of the aerosol generating product 90. The present invention can be used to detect the real-time residual aerosol content of the aerosol generating product 90 during the puffing process, and a control method for the aerosol generating device can be designed by detecting the residual aerosol content, the aerosol content consumed per puff, and the number of puffs, so as to ensure the uniformity of the number of puffs and improve the puffing experience of the puffer.

[0123] During the heating process, when the real-time residual aerosol content is detected to be lower than the third threshold value, it indicates that the aerosol generating material is almost consumed, and the control system stops controlling the power to the heater. This control method ensures that each section of the aerosol generating product 90 is evenly baked, avoids the waste of a certain section of the aerosol generating material due to insufficient baking and the burning caused by over-baking, and ensures the uniformity of the user's puffing experience.

[0124] When it is detected that the aerosol content of a certain puff of the user is greater than the set fourth threshold, the power supply to the heater 10 is reduced to prevent the aerosol from being consumed too quickly, thereby ensuring the uniformity of the user's puffing experience during subsequent puffs.

[0125] When it is detected that the aerosol content of a certain puff of the user is less than the set fifth threshold, the power supply to the heater 10 is increased to increase the consumption rate of the aerosol, ensuring that the aerosol can be fully consumed after the normal puffing process is completed to avoid waste. Control method

[0126] In another specific embodiment, when a plurality of heating-detection modules are arranged around the circumference of the substrate, Figure 5Taking the aerosol generating device shown as an example, the control system is configured to be able to obtain the capacitance value of a certain heating-detection module (100), and control the power supply to the conductive heating element (11) of the certain heating-detection module according to the obtained capacitance value. Specifically, when any heating-detection module detects that the aerosol content inhaled by the user is greater than the first preset threshold, the power supply to the heating-detection module is reduced; when any heating-detection module detects that the aerosol content inhaled by the user is less than the second preset threshold, the power supply to the heating-detection module is increased; when the real-time remaining aerosol content detected by any heating-detection module is lower than the third preset threshold, the power supply to the heating-detection module is stopped. This control method can ensure that each section of the cigarette is baked evenly, avoid the waste of a certain section of tobacco that is not fully baked and the burning caused by over-baking, and ensure the uniformity of the user's smoking experience.

[0127] The control method can be controlled based on the detection value of one of the heating-detection modules 100, or based on the detection value of any heating-detection module 100 exceeding the above threshold, or based on the average value of the detection values ​​of multiple heating-detection modules 100 exceeding the above threshold.

[0128] Industrial Applicability:

[0129] This patent proposes a heating-detection module and the application of the detection module. A capacitor plate is added to the heating element, which is crossed with the conductive heating element to form an interdigital capacitor structure. The inhalable aerosol content in the aerosol generating product can be detected, and the remaining inhalable aerosol content can be accurately fed back, so that the aerosol generating device can achieve precise control of the heating power for different aerosol generating products or different states of the same aerosol generating product, thereby ensuring the consistency of the aerosol generation amount. In addition, by detecting the aerosol consumption, the usage parameters such as the number of puffs can also be accurately characterized and fed back to the user. Moreover, this structure does not require the introduction of any additional dedicated airflow and humidity measurement sensors. The detection is achieved only through the design of the heating-detection module. It is small in size, simple in structure, and accurate in detection.

[0130] The terms and expressions used here are for description only, and the present invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, changes and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0131] Similarly, it should be pointed out that although the utility model has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the utility model, and various equivalent changes or substitutions can be made without departing from the spirit of the utility model. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the utility model, they will fall within the scope of the claims of the utility model.

Claims

1. A heating component that can be used in an aerosol generating device, wherein the heating component (10; 10') can heat an aerosol generating product (90) contained in the aerosol generating device, characterized in that: The heating component (10; 10') comprises a substrate (300; 300') and a heating-detection module (100), wherein the heating-detection module (100) is arranged on the substrate (300; 300'), wherein the heating-detection module (100) comprises a conductive heating element (11) and a capacitive detection element (12), and the heating-detection module (100) is capable of detecting the inhalation condition of the aerosol generating product (90), and the conductive heating element (11) and the capacitive detection element (12) are staggeredly distributed, so that the heating-detection module (100) constitutes an interdigital capacitor.

2. The heating assembly according to claim 1, characterized in that One or more heating-detection modules (100) are arranged around the circumference of the substrate (300; 300'), and at least one of the heating-detection modules (100) can be independently controlled.

3. The heating assembly according to claim 2, characterized in that The capacitance detection element (12) comprises at least one capacitance interdigital unit (120), the capacitance interdigital unit (120) comprising a plate element (121) and a connection end (122), at least one of the plate elements (121) is connected via the connection end (122) to form the capacitance detection element (12), and the conductive heating element (11) is arranged between at least one group of adjacent capacitance interdigital units (120).

4. The heating assembly according to claim 3, characterized in that The conductive heating element (11) comprises at least one resistor interdigital unit (110); at least one of the resistor interdigital units (110) is connected in series to form the conductive heating element (11); each of the resistor interdigital units (110) comprises a first heating track (111) and a second heating track (112); the first heating track (111) and the second heating track (112) are connected in series; an electrical insulation space (140) is formed between the first heating track (111) and the second heating track (112).

5. The heating assembly according to claim 4, characterized in that After the heating-detection module (100) is laid flat, the conductive heating element (11) satisfies: 0.01mm≤E≤100mm and / or 0.01mm≤H≤100mm; Wherein, E is the total length of the conductive heating element (11) along the axial direction, and H is the total width of the conductive heating element (11) along the transverse direction.

6. The heating assembly according to claim 5, characterized in that The conductive heating element (11) further satisfies: 0.01mm≤w≤50mm and / or 0.01mm≤b≤50mm; Wherein, w is the width of a single resistor finger unit (110), and b is the spacing width between the resistor finger units (110).

7. The heating assembly according to claim 2, characterized in that The heating component is of internal heating or external heating type.

8. The heating assembly according to claim 2, characterized in that The conductive heating element (11) and the capacitance detection element (12) are arranged on a substrate (130), and the substrate (130) is wrapped or laid on the base (300').

9. An aerosol generating device capable of heating an aerosol generating article by resistive heating to generate an aerosol for inhalation by a user, characterized in that: The aerosol generating device comprises: a power supply, a control system and a heating component according to any one of claims 1 to 8, wherein the power supply, the control system and the heating component are electrically connected to each other, and the control system is configured to obtain the capacitance value of the heating-detection module (100) so as to detect the inhalation condition of the aerosol generating product.

10. The aerosol generating device according to claim 9, characterized in that The heating-detection modules (100) are arranged in a plurality around the circumference of the substrate (300; 300'); The control system is configured to obtain a capacitance value of at least one of the heating-detection modules (100), and to control the power supply to the conductive heating element (11) of the heating-detection module according to the obtained capacitance value.

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