Heater and aerosol-generating device

Abstract

The utility model provides a heater and an aerosol generating device. The heater comprises a base body; the heating film is arranged on the surface of the base body; the heating film is used for heating an aerosol-forming substrate to generate aerosol; the electrode is electrically connected with the heating film; the lead wire is provided with a flat end; and the flat end is electrically connected with the electrode. According to the invention, the flat end of the lead is fixedly connected with the electrode in a sintering manner, and the flat end of the lead can increase the contact area with the conductive electrode, so that the binding force of the lead and the electrode after sintering is increased, and the wiring reliability is ensured; in addition, no contact resistance exists between the lead and the electrode, so that the problem of high-temperature oxidation is avoided.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and more particularly to a heater and an aerosol generation apparatus. Background Technology

[0002] Smoking articles such as cigarettes and cigars burn tobacco to produce smoke during use. Efforts have been made to provide alternatives to these tobacco-burning articles by creating products that release compounds without combustion. An example of such products is the so-called heat-not-burn product, which releases compounds by heating tobacco instead of burning it.

[0003] An existing aerosol generating device comprises a heater consisting of an electrothermal coating and a conductive coating disposed on the outer surface of a substrate. The electrothermal coating heats the aerosol-forming matrix to generate aerosols, while the conductive coating is electrically connected to a battery cell via electrode contacts, thereby providing power to the electrothermal coating. A problem with this aerosol generating device is the presence of contact resistance at the contact points between the electrode contacts and the conductive coating. These points experience high current flow and high operating temperatures, making them prone to oxidation. This further increases the contact resistance and the heat generated, further raising the operating temperature and accelerating the oxidation rate at the contact points until the total resistance of the heater exceeds the set acceptable resistance value, causing the device to fail to start and operate normally. Utility Model Content

[0004] This application provides a heater and an aerosol generating apparatus, which aim to avoid the problem of contact resistance at the contact point between the electrode contact sheet and the conductive coating.

[0005] This application provides a heater, comprising:

[0006] Matrix;

[0007] A heating film is disposed on the surface of the substrate; the heating film is used to heat the aerosol forming matrix to generate aerosols.

[0008] The electrode is electrically connected to the heating film;

[0009] The lead wire has a flat end; the flat end is electrically connected to the electrode.

[0010] In one example, the matrix is ​​configured as a tubular structure that forms a matrix around at least a portion of the aerosol and extends axially.

[0011] In one example, the heating film is configured to generate infrared radiation to radiate and heat the aerosol forming matrix.

[0012] In one example, the electrode includes a conductive electrode for feeding electrical power to the heating film, and the lead includes a conductive lead;

[0013] The flat end of the conductive lead is fixedly connected to the conductive electrode by sintering, thereby forming an electrical connection between the conductive lead and the conductive electrode.

[0014] In one example, the thickness of the sintered region of the conductive electrode is between 30 μm and 50 μm.

[0015] In one example, the conductive electrode includes a conductive coating applied to the surface of the substrate.

[0016] In one example, the electrode includes an empty electrode for dividing the heating film into at least two sub-heating films connected in series, and the lead includes thermocouple wire for measuring temperature;

[0017] The flat end of the thermocouple wire is fixedly connected to the empty electrode by sintering.

[0018] In one example, the thickness of the sintered region of the empty electrode is between 30 μm and 50 μm.

[0019] In one example, the lead has a circular cross-section, and one end of the lead is flattened to form the flat end.

[0020] In one example, the diameter of the lead wire is between 0.2 mm and 1 mm.

[0021] Another aspect of this application provides an aerosol generating apparatus, including a power source for providing electricity and the aforementioned heater.

[0022] The heater and aerosol generating device provided in this application are fixedly connected to the electrode by sintering through the flat end of the lead wire. The flat end of the lead wire can increase the contact area with the conductive electrode, thereby increasing the bonding force between the lead wire and the electrode after sintering and ensuring the reliability of the connection. In addition, there is no contact resistance between the lead wire and the electrode, avoiding the problem of high-temperature oxidation. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 This is a schematic diagram of the aerosol generating apparatus provided in the embodiments of this application;

[0025] Figure 2 This is an exploded view of the aerosol generating apparatus provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the first type of heater provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the heating film after it has been deployed in the first type of heater provided in this application embodiment;

[0028] Figure 5 This is a schematic diagram of a second type of heater provided in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of a third type of heater provided in the embodiments of this application;

[0030] Figure 7 This is a schematic diagram of the fourth type of heater provided in the embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the heating film after it has been unfolded in the fifth type of heater provided in this application embodiment;

[0032] Figure 9 This is a schematic diagram showing the heater after it is fixedly connected to the leads and thermocouple wires according to the embodiments of this application;

[0033] Figure 10 This is a schematic diagram of the lead wires provided in the embodiments of this application;

[0034] Figure 11 This is a schematic diagram of the thermocouple wire provided in the embodiments of this application. Detailed Implementation

[0035] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. 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. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0037] Figures 1-2This application provides an aerosol generating apparatus 100, which includes a housing assembly 6 and a heater 11. The heater 11 is disposed within the housing assembly 6. The heater 11 can radiate infrared rays to heat the aerosol forming matrix to generate inhalable aerosols.

[0038] The housing assembly 6 includes an outer shell 61, a bracket 62, an end cap, and a bottom cap 64.

[0039] A bracket 62 is disposed within the housing 61. The bracket 62 includes a front bracket 621 and a rear bracket 622, which are fixedly connected. An insertion port is provided on the bracket 62, through which an aerosol-generating article containing an aerosol-forming matrix is ​​removably received or inserted into the heater 11. An end cap is disposed within the bracket 62 and is used to hold the heater 11. A bottom cover 64 is disposed at one end of the housing 61 and covers the housing 61.

[0040] The end cap includes an upper end cap 15 fitted onto the upper end of the heater 11 and a lower end cap 13 fitted onto the lower end of the heater 11. An air inlet pipe 641 protrudes from the bottom cover 64. The end of the lower end cap 13 facing away from the upper end cap 15 is connected to the air inlet pipe 641. The upper end cap 15, the heater 11, the lower end cap 13, and the air inlet pipe 641 are coaxially arranged. The heater 11 can be sealed with the upper end cap 15 and the lower end cap 13 by a sealing element. The lower end cap 13 can also be sealed with the air inlet pipe 641 by a sealing element. The air inlet pipe 641 is connected to the outside air so that the user can smoothly inhale when sucking.

[0041] The aerosol generating device 100 also includes a circuit board 3 and a power supply 7. Both the circuit board 3 and the power supply 7 are housed within the bracket 62. The power supply 7 includes battery cells, which can be primary or secondary battery cells. The power supply 7 is electrically connected to the circuit board 3. A button 4 protrudes from the outer casing 61, and pressing the button 4 allows the heater 11 to be powered on or off. The circuit board 3 is also connected to a charging interface 31, which is exposed on the bottom cover 64. Users can use the charging interface 31 to charge or upgrade the aerosol generating device 100 to ensure its continuous use.

[0042] The aerosol generating device 100 also includes a heat insulation tube 17, which is disposed within the support 62 and surrounding the heater 11. The heat insulation tube 17 prevents excessive heat transfer to the outer casing 61, thus avoiding excessive heat exposure for the user. The heat insulation tube includes heat insulation material, such as heat insulation adhesive, aerogel, aerogel felt, asbestos, aluminum silicate, calcium silicate, diatomaceous earth, zirconium oxide, etc. The heat insulation tube can also be a vacuum heat insulation tube. An infrared reflective coating may also be formed inside the heat insulation tube 17 to reflect the infrared radiation emitted by the heater 11 towards the aerosol forming matrix, thereby improving heating efficiency.

[0043] The aerosol generating device 100 also includes a temperature sensor 2, such as a thermocouple, for detecting the real-time temperature of the heater 11 and transmitting the detected real-time temperature to the circuit board 3. The control unit in the circuit board 3 adjusts the current flowing through the heater 11 according to the real-time temperature. Specifically,

[0044] When the temperature sensor 2 detects that the real-time temperature of the heater 11 is low, for example, when the temperature of the heater 11 is less than 150°C, the control unit controls the power supply 7 to output a higher voltage to the electrode, thereby increasing the current fed into the heater 11, increasing the heating power of the aerosol forming matrix, and reducing the waiting time for the user to pump.

[0045] When the temperature sensor 2 detects that the temperature of the heater 11 is 150℃-200℃, the control unit controls the power supply 7 to output a normal voltage to the heater 11.

[0046] When the temperature sensor 2 detects that the temperature of the heater 11 is between 200℃ and 250℃, the control unit controls the power supply 7 to output a lower voltage to the heater 11.

[0047] When the temperature sensor 2 detects that the temperature of the heater 11 is 250°C or higher, the control unit controls the power supply 7 to stop outputting voltage to the heater 11.

[0048] Figures 3-4 This is the first type of heater provided in the embodiments of this application. The heater 11 includes:

[0049] The substrate 110 is configured as a tubular structure that forms a matrix around at least a portion of the aerosol and extends axially.

[0050] The substrate 110 can be made of high-temperature resistant and transparent materials such as quartz glass, ceramics, or mica, or it can be made of other materials with high infrared transmittance, such as high-temperature resistant materials with infrared transmittance of more than 95%, and no specific limitation is made herein. The substrate 110 is preferably cylindrical, and the hollow part inside the substrate 110 defines or forms a chamber for receiving aerosols to form a matrix.

[0051] An aerosol forming matrix is ​​a matrix capable of releasing volatile compounds that can form aerosols. These volatile compounds can be released by heating the aerosol forming matrix. The aerosol forming matrix can be solid or liquid, or include both solid and liquid components. The aerosol forming matrix can be adsorbed, coated, impregnated, or otherwise loaded onto a carrier or support. The aerosol forming matrix can conveniently be part of an aerosol-generating article.

[0052] The aerosol-forming matrix may include nicotine. The aerosol-forming matrix may include tobacco, for example, a tobacco-containing material containing volatile tobacco flavor compounds that are released from the aerosol-forming matrix upon heating. The aerosol-forming matrix may include at least one aerosol-forming agent, which may be any suitable known compound or mixture of compounds that, in use, facilitates the formation of dense and stable aerosols and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating system. Suitable aerosol-forming agents are well known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono, di, or triacetic acid esters of glycerol; and fatty acid esters of mono, di, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate.

[0053] The heating film 111 is used to heat the aerosol forming matrix to generate aerosols. More specifically, the heating film 111 is used to generate infrared radiation to radiate heat to the aerosol forming matrix.

[0054] A heating film 111 is formed on the surface of a substrate 110, and the heating film 111 includes an infrared electrothermal coating applied to the surface of the substrate 110. The heating film 111 can be formed on the outer surface or the inner surface of the substrate 110. Preferably, the heating film 111 is formed on the outer surface of the substrate 110.

[0055] The heating film 111 receives electrical power to generate heat, which in turn radiates infrared radiation of a certain wavelength, such as far-infrared radiation of 8μm to 15μm. When the wavelength of the infrared radiation matches the absorption wavelength of the aerosol-forming matrix, the energy of the infrared radiation is easily absorbed by the aerosol-forming matrix. In this example, the wavelength of the infrared radiation is not limited and can be infrared radiation of 0.75μm to 1000μm, preferably far-infrared radiation of 1.5μm to 400μm.

[0056] The heating film 111 and the upper end of the substrate 110 are spaced apart by a distance of 0.2mm to 1mm, which is beneficial for manufacturing. The lower end of the heating film 111 and the substrate 110 are also spaced apart by a distance of 1mm to 4mm, which is beneficial for the arrangement of conductive electrodes and at the same time avoids the temperature of the lower end of the substrate 110 from getting too high.

[0057] The electrodes include conductive electrodes 112a, 112b, empty electrodes 113a, and 113b, which are spaced apart from each other on the surface of the substrate 110. "Spaced apart from each other" means that there is no direct contact between any two electrodes to form a short circuit.

[0058] The conductive electrode 112a includes a coupling portion 112a1 extending circumferentially along the substrate 110 and a conductive portion 112a2 extending axially from the coupling portion 112a1 toward the upper end of the substrate 110. The coupling portion 112a1 is arc-shaped and is spaced apart from the heating film 111, with the coupling portion 112a1 positioned between the heating film 111 and the lower end of the substrate 110. The conductive portion 112a2 is strip-shaped, with an axial extension length greater than that of the heating film 111; the conductive portion 112a2 remains in contact with the heating film 111 to form an electrical connection. The structure of the conductive electrode 112b is similar to that of the conductive electrode 112a, and the conductive electrode 112b is symmetrically arranged on the substrate 110. Conductive leads can be fixedly connected to the coupling portion 112a1 to form an electrical connection with a power source outside the heater 11, such as power source 7 or a power supply voltage converted from power source 7.

[0059] Depend on Figure 3 As can be seen, conductive portions 112a2 and 112b2 divide the heating film 111 into left and right halves. An empty electrode 113a is disposed in the right half of the heating film 111, and an empty electrode 113b is disposed in the left half of the heating film 111. The left and right halves of the heating film 111 are connected in parallel between conductive portions 112a2 and 112b2.

[0060] The empty electrode 113a is strip-shaped, and its axial extension length is the same as the axial extension length of the right half of the heating film 111. The empty electrode 113a divides the right half of the heating film 111 into two sub-heating films connected in series between the conductive portion 112a2 and the conductive portion 112b2. Figure 4 As shown in Figures A1 and A2, sub-heating films A1 and A2 are distributed along the circumferential direction of the substrate 110; the equivalent resistance of sub-heating film A1 and sub-heating film A2 can be the same or different. By providing an empty electrode 113a, the overall resistance of the right half of the heating film 111 can be reduced. For example, by providing an empty electrode 113a between conductive portions 112a2 and 112b2, the overall resistance of the right half of the heating film 111 can be reduced by approximately 20%.

[0061] It should be noted that, as needed, multiple empty electrodes 113a can be provided in the right half of the heating film 111 to divide the right half of the heating film 111 into multiple sub-heating films connected in series between the conductive part 112a2 and the conductive part 112b2; for example, two empty electrodes 113a can be divided into three sub-heating films connected in series between the conductive part 112a2 and the conductive part 112b2. The equivalent resistance of the three sub-heating films can be the same or different, or the equivalent resistance of two of the sub-heating films can be the same.

[0062] The empty electrode 113b is similar, and the divided sub-heating films can be referenced. Figure 4 As shown in A3 and A4 of the diagram.

[0063] After the heater 11 is energized, the power supply feeds electrical power to the heating film 111 through conductive leads and conductive electrodes. For example, the coupling part 112a1 is electrically connected to the positive terminal of the power supply, and the coupling part 112b1 is electrically connected to the negative terminal of the power supply (or vice versa). The current flows from the coupling part 112a1 to the conductive part 112a2, passes through the sub-heating films A1 and A2 in sequence, or passes through the sub-heating films A3 and A4 in sequence, and then flows out from the conductive part 112b2 and the coupling part 112b1. The empty electrodes 113a and 113b are not connected to the power supply or circuit outside the heater 11, that is, the empty electrodes 113a and 113b are suspended. The current does not flow directly into the empty electrode 113a and then flows out from the conductive part 112b2 or the conductive part 112a2.

[0064] The conductive electrodes 112a, 112b, 113a, and 113b preferably employ a conductive coating, which can be a metallic coating, including silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or alloys thereof. The widths of the 113a and 113b are between 0.5mm and 3mm; or between 0.5mm and 2.5mm; in specific examples, they can be 1mm and 2mm.

[0065] It should be noted that during the preparation of heater 11, empty electrodes 113a and / or empty electrodes 113b can be disposed between substrate 110 and heating film 111 in a direction perpendicular to the surface of substrate 110; alternatively, heating film 111 can be disposed between substrate 110 and empty electrodes.

[0066] It should be noted that, in other examples, at least one of the conductive electrode 112a, conductive electrode 112b, empty electrode 113a, and empty electrode 113b can be attached to the heating film 111. For example, at least one of the conductive electrode 112a, conductive electrode 112b, empty electrode 113a, and empty electrode 113b can be coated on the inner wall of the sleeve, and the sleeve is fitted onto the substrate 110, so that at least one of the conductive electrode 112a, conductive electrode 112b, empty electrode 113a, and empty electrode 113b is in close contact with the heating film 111; the arrangement of the conductive electrode 112a, conductive electrode 112b, empty electrode 113a, and empty electrode 113b can refer to the above examples.

[0067] It should be noted that in other examples, it is also feasible not to provide a coupling portion for conductive electrode 112a or conductive electrode 112b. In this case, the axial extension length of the conductive portion of conductive electrode 112a or conductive electrode 112b is the same as the axial extension length of heating film 111; conductive leads can be fixedly connected to the conductive portion of conductive electrode 112a or conductive electrode 112b to form an electrical connection with a power source outside heater 11, such as power source 7 or the power supply voltage converted from power source 7.

[0068] It should be noted that in other examples, the substrate 110 can be made of a material with high thermal conductivity. The heating film 111 can generate heat under the power provided by the power source 7. This heat can be transferred through the substrate 110 to the aerosol forming matrix, thereby generating an aerosol.

[0069] Figure 5 This is the second type of heater provided in the embodiments of this application.

[0070] and Figures 3-4 The difference lies in that both conductive electrodes 112a and 112b are ring-shaped and extend circumferentially along the substrate 110; multiple empty electrodes 113a, also ring-shaped, are disposed between conductive electrodes 112a and 112b; these multiple empty electrodes 113a divide the heating film 111 into four sub-heating films (A1, A2, A3, and A4 in the figure) connected in series between conductive portions 112a2 and 112b2. The equivalent resistances of the four sub-heating films are different, or they can be the same. This reduces the overall resistance of the heating film 111 and improves the uniformity of the temperature field in the substrate 110.

[0071] In this example, four sub-heating films are distributed along the axial direction of the substrate 110, and the length of the empty electrode 113a extending along the circumferential direction of the substrate 110 is the same as the length of the heating film 111 extending along the circumferential direction of the substrate 110.

[0072] It should be noted that in other examples, it is also feasible for the empty electrode 113a to be in an arc shape.

[0073] Conductive leads can be fixedly connected to conductive electrodes 112a and 112b to form an electrical connection with a power source outside the heater 11, such as power source 7 or the power supply voltage converted from power source 7.

[0074] After the heater 11 is powered on, for example, the conductive electrode 112a is electrically connected to the positive terminal of the power supply and the conductive electrode 112b is electrically connected to the negative terminal of the power supply. The current flows in from the conductive electrode 112a, passes through the sub-heating film A1, sub-heating film A2, sub-heating film A3, and sub-heating film A4 in sequence, and then flows out from the conductive electrode 112b.

[0075] Figure 6 This is the third type of heater provided in the embodiments of this application.

[0076] and Figure 5 The difference lies in the fact that the electrode includes a conductive electrode 112c, which is spaced apart from other conductive electrodes and an empty electrode. Conductive electrodes 112a, 112b, and 112c divide the heating film 111 into two independent heating regions, upper and lower. By controlling the activation of these two independent heating regions, segmented heating of the aerosol-forming matrix can be achieved. For example, the upper heating region can be activated first to heat the upper part of the product, and then the lower heating region can be activated to heat the lower part of the product; or, the upper heating region can be activated first to heat the upper part of the product, and then the entire heating region can be activated to heat the entire product.

[0077] An empty electrode 113a is disposed between conductive electrodes 112a and 112c. The empty electrode 113a divides the upper heating area into two sub-heating films connected in series between conductive electrodes 112a and 112c (as shown in A1 and A2 in the figure).

[0078] An empty electrode 113b is disposed between conductive electrodes 112c and 112b. The empty electrode 113b divides the lower heating area into two sub-heating films connected in series between conductive electrodes 112c and 112b (as shown in A3 and A4 in the figure).

[0079] Conductive leads can be fixedly connected to conductive electrodes 112a, 112b, and 112c to form an electrical connection with a power source outside the heater 11, such as power source 7 or the power supply voltage converted from power source 7.

[0080] When the upper heating area is activated, for example, conductive electrode 112a is electrically connected to the positive terminal of the power supply and conductive electrode 112c is electrically connected to the negative terminal of the power supply. Current flows in from conductive electrode 112a, passes through sub-heating film A1 and sub-heating film A2 in sequence, and then flows out from conductive electrode 112c.

[0081] When the lower heating area is activated, for example, conductive electrode 112c is electrically connected to the positive terminal of the power supply and conductive electrode 112b is electrically connected to the negative terminal of the power supply. Current flows in from conductive electrode 112c, passes through sub-heating film A3 and sub-heating film A4 in sequence, and then flows out from conductive electrode 112b.

[0082] Figures 7-8 This is the fourth type of heater provided in the embodiments of this application.

[0083] and Figures 3-4 The difference is that the heating film 111 includes two heating films spaced apart, as shown in the figure: heating film 111a and heating film 111b. Heating film 111a is closer to the nozzle of the aerosol generating device 100 than heating film 111b. The distance between heating film 111a and heating film 111b is between 0.2 mm and 1 mm.

[0084] The conductive electrode 112a includes a coupling portion 112a1 extending circumferentially along the substrate 110 and a conductive portion 112a2 extending axially from the coupling portion 112a1 toward the upper end of the substrate 110. The coupling portion 112a1 is arc-shaped and is spaced apart from the heating film 111b, with the coupling portion 112a1 positioned between the lower end of the heating film 111b and the substrate 110. Conductive leads can be fixedly connected to the coupling portion 112a1 to form an electrical connection with a power source outside the heater 11, such as power source 7 or a power supply voltage converted from power source 7. The conductive portion 112a2 is strip-shaped, with an axially extending length greater than that of the heating film 111b, and the upper end of the conductive portion 112a2 is flush with the upper end of the heating film 111b. The conductive portion 112a2 remains in contact with the heating film 111b to form an electrical connection.

[0085] The conductive electrode 112b is strip-shaped, and its axial extension length is the same as that of the heating film 111a. The conductive electrode 112b is kept in contact with the heating film 111a to form an electrical connection.

[0086] The structure of conductive electrode 112c is similar to that of conductive electrode 112a. The coupling portion 112c1 of conductive electrode 112c is disposed between the lower end of heating film 111b and substrate 110. The conductive portion 112c2 is strip-shaped, but its axial extension length is greater than the sum of the axial extension lengths of heating film 111a and heating film 111b. The upper end of conductive portion 112c2 is flush with the upper end of heating film 111a. Conductive portion 112c2 maintains contact with both heating film 111a and heating film 111b to form an electrical connection.

[0087] Both empty electrodes 113a and 113b are strip-shaped and disposed within the heating film 111b. The axial extension length of empty electrodes 113a and 113b is the same as the axial extension length of the heating film 111b.

[0088] An empty electrode 113a is disposed between conductive electrodes 112a and 112c. The empty electrode 113a divides the heating film between conductive electrodes 112a and 112c into two sub-heating films (shown as B1 and B2 in the figure) connected in series between conductive electrodes 112a and 112c. Sub-heating films B1 and B2 are distributed along the circumferential direction of the substrate 110. The equivalent resistance of sub-heating film B1 and sub-heating film B2 can be the same or different.

[0089] An empty electrode 113b is also disposed between conductive electrodes 112a and 112c. The empty electrode 113b divides the heating film between conductive electrodes 112a and 112c into two sub-heating films (shown as B3 and B4 in the figure) connected in series between conductive electrodes 112a and 112c. Sub-heating films B3 and B4 are distributed along the circumferential direction of the substrate 110. The equivalent resistance of sub-heating film B3 and sub-heating film B4 can be the same or different.

[0090] By setting empty electrodes 113a and 113b, the overall resistance of the heating film 111b can be reduced.

[0091] and Figure 6 Similarly, through Figure 7 The electrode arrangement in the heating film allows for independent control of heating films 111a and 111b. Specifically, the power supply can be controlled to provide heating power to heating films 111a and / or 111b; for example, first, the power supply can be controlled to provide heating power to heating film 111a to heat the upper part of the aerosol-generating article (the part corresponding to the area of ​​heating film 111a); then, the power supply can be controlled to provide heating power to heating film 111b to heat the lower part of the aerosol-generating article (the part corresponding to the area of ​​heating film 111b). The reverse is also possible.

[0092] Alternatively, the power supply can be controlled to provide heating power to the heating film 111a to heat the upper part of the aerosol-generated product; then the power supply can be controlled to simultaneously provide heating power to the heating films 111a and 111b to heat the entire aerosol-generated product.

[0093] Alternatively, the power supply can be controlled to provide heating power to the heating film 111b to heat the lower half of the aerosol-generated product; then the power supply can be controlled to simultaneously provide heating power to the heating films 111a and 111b to heat the entire aerosol-generated product.

[0094] When controlling the heating film 111a to heat, for example, the conductive electrode 112b is electrically connected to the positive terminal of the power supply, and the coupling part 112c1 is electrically connected to the negative terminal of the power supply; in this way, the current flows in from the conductive electrode 112b, passes through the sub-heating film A1 or sub-heating film A2 along the circumferential direction of the substrate 110, and flows out from the conductive part 112c2.

[0095] When controlling the heating film 111b to heat, for example, coupling part 112a1 is electrically connected to the positive terminal of the power supply, and coupling part 112c1 is electrically connected to the negative terminal of the power supply. Current flows in from conductive part 112a2, passes sequentially through sub-heating film B1 and sub-heating film B2, or sequentially through sub-heating film B4 and sub-heating film B3, and then flows out from conductive part 112c2. Empty electrodes 113a and 113b are not connected to any power supply or circuit outside the heater 11; that is, empty electrodes 113a and 113b are suspended. Current cannot flow directly into empty electrode 113a and then out from conductive part 112b2 or conductive part 112a2. The presence of empty electrodes 113a and 113b reduces the overall resistance of the heating film 111b.

[0096] It should be noted that it is also feasible to omit the coupling part from either conductive electrode 112a or conductive electrode 112c.

[0097] It should be noted that it is also feasible to place empty electrode 113a or empty electrode 113b in heating film 111a.

[0098] Based on the heater 11 described above, such as Figures 9-10 As shown, in one example, the conductive lead 114 has a flat end A, which is fixedly connected to the conductive electrode of the heater 11 by sintering, thereby forming an electrical connection between the conductive lead 114 and the conductive electrode of the heater 11.

[0099] In this example, the conductive lead 114 can be made of materials such as silver, nickel, or copper. The conductive lead 114 has a circular cross-section and a diameter ranging from 0.2 mm to 1 mm. One end of the circular conductive lead 114 is flattened to form a flat end A, while the shape of the other end B remains unchanged. An insulating layer C is fitted over the conductive lead 114. The insulating layer C has high-temperature resistance and can be made of materials such as PTFE, PAEK, or PEEK. The flat end A increases the contact area with the conductive electrode of the heater 11, thereby increasing the bonding strength between the conductive lead 114 and the conductive electrode of the heater 11 after sintering, ensuring the reliability of the wiring.

[0100] The thickness of the sintered region of the conductive electrode of heater 11 is between 30 μm and 50 μm, or between 30 μm and 45 μm, or between 35 μm and 45 μm, or between 40 μm and 45 μm. This thickness of conductive electrode can increase or improve the bonding force between the conductive lead 114 and the conductive electrode of heater 11 after sintering.

[0101] When a conductive coating is used on the conductive electrode of heater 11, the first conductive paste can be coated on the surface of substrate 110 and sintered once to form the conductive coating. Then, the flat end A is bonded to the conductive coating with the second conductive paste and sintered a second time to achieve a fixed connection.

[0102] The composition of the first conductive paste is the same as that of the second conductive paste, for example, both include silver powder, organic binder, and low-melting-point glass powder. The sintering temperature of the first or second sintering is between 400 and 800°C, specifically 500°C, 600°C, or 700°C. The sintering time is between 0.5 h and 2 h, for example, 1 h.

[0103] After sintering, the accumulation height of the conductive paste between the flat end A of the conductive lead 114 and the conductive coating is small, making the heater 11 compact and facilitating the design of the thermal insulation structure. Furthermore, there is no contact resistance between the flat end A of the conductive lead 114 and the conductive coating, resulting in high connection reliability, avoiding high-temperature oxidation problems, and improving the service life of the heater 11.

[0104] Please combine Figure 9 and Figure 11 To understand this, the temperature sensor 2 is implemented using a thermocouple, which has multiple thermocouple wires, such as thermocouple wire 21 and thermocouple wire 22 in the figure. That is, the leads include thermocouple wire 21 and thermocouple wire 22 used for measuring temperature.

[0105] The thermocouple wire can be a nickel-chromium-nickel-silicon (nickel-aluminum) thermocouple (type K), a copper-copper-nickel thermocouple (type T), an iron-copper-nickel thermocouple (type J), ​​or a nickel-chromium-copper-nickel thermocouple (type E). Similar to conductive lead 114, the thermocouple wire has a circular cross-section, and the wire diameter ranges from 0.2 mm to 1 mm. One end of the circular cross-section thermocouple wire is flattened to form a flat end A', while the shape of the other end B' remains unchanged. An insulating layer C' is fitted onto the outside of the thermocouple wire. The insulating layer C' has high temperature resistance and can be made of PTFE, PAEK, or PEEK, etc.

[0106] The flat end A' is fixedly connected to the empty electrode of the heater 11 by sintering. The flat end A' increases the contact area with the empty electrode of the heater 11, thereby increasing the bonding force between the thermocouple wire and the empty electrode of the heater 11 after sintering, and ensuring the reliability of the wiring.

[0107] The thickness of the sintered region of the empty electrode of heater 11 is between 30 μm and 50 μm, or between 30 μm and 45 μm, or between 35 μm and 45 μm, or between 40 μm and 45 μm. Such a thickness of empty electrode can increase or improve the bonding force between the thermocouple wire and the empty electrode of heater 11 after sintering.

[0108] Similar to conductive lead 114, when a conductive coating is used on the empty electrode of heater 11, a first conductive paste can be applied to the surface of substrate 110 and sintered once to form the conductive coating. Then, the flat end A' is bonded to the conductive coating with a second conductive paste and sintered a second time to achieve a fixed connection. The composition of the first conductive paste is the same as that of the second conductive paste, for example, both include silver powder, organic binder, and low-melting-point glass powder. The sintering temperature of the first or second sintering is between 400 and 800°C, specifically 500°C, 600°C, or 700°C. The sintering time is between 0.5 h and 2 h, for example, 1 h.

[0109] After sintering, the accumulation height of the conductive paste between the flat end A' of the thermocouple wire and the conductive coating is small, making the heater 11 compact and facilitating the design of the thermal insulation structure. Furthermore, the absence of contact resistance between the flat end A' of the thermocouple wire and the conductive coating results in more accurate and sensitive temperature measurement, leading to higher temperature control consistency in the heater 11 and providing users with a stable and consistent optimal suction experience.

[0110] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heater, characterized in that, include: Matrix; A heating film is disposed on the surface of the substrate; the heating film is used to heat the aerosol forming matrix to generate aerosols. The electrode is electrically connected to the heating film; The lead wire has a flat end; the flat end is electrically connected to the electrode.

2. The heater according to claim 1, characterized in that, The matrix is ​​configured as a tubular structure that forms a matrix around at least a portion of the aerosol and extends axially.

3. The heater according to claim 1, characterized in that, The heating film is configured to generate infrared radiation to radiate and heat the aerosol-forming matrix.

4. The heater according to claim 1, characterized in that, The electrode includes a conductive electrode for feeding electrical power to the heating film, and the lead includes a conductive lead; The flat end of the conductive lead is fixedly connected to the conductive electrode by sintering, thereby forming an electrical connection between the conductive lead and the conductive electrode.

5. The heater according to claim 4, characterized in that, The thickness of the sintered region of the conductive electrode is between 30 μm and 50 μm.

6. The heater according to claim 4, characterized in that, The conductive electrode includes a conductive coating applied to the surface of the substrate.

7. The heater according to claim 1, characterized in that, The electrode includes an empty electrode for dividing the heating film into at least two sub-heating films connected in series, and the lead includes thermocouple wire for measuring temperature. The flat end of the thermocouple wire is fixedly connected to the empty electrode by sintering.

8. The heater according to claim 7, characterized in that, The thickness of the sintered region of the empty electrode is between 30 μm and 50 μm.

9. The heater according to claim 1, characterized in that, The lead wire has a circular cross-section, and one end of the lead wire is flattened to form the flat end.

10. The heater according to claim 9, characterized in that, The diameter of the lead wire is between 0.2 mm and 1 mm.

11. An aerosol generating device, characterized in that, It includes a power source for providing electricity and a heater as described in any one of claims 1-10.

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