Heater and smoke apparatus including the heater

Abstract

This application relates to the field of smoking devices, providing a heater and a smoking device including the heater. The heater includes a substrate having a surface; an infrared electrothermal coating disposed on the surface of the substrate; a conductive module including a first conductive portion and a second conductive portion disposed on the substrate, both the first and second conductive portions being electrically connected to the infrared electrothermal coating; and a flexible circuit board including a flexible substrate and a first electrode and a second electrode formed on the flexible substrate. The flexible substrate is fixed to the surface of the substrate, such that the first electrode is electrically connected to the first conductive portion, and the second electrode is electrically connected to the second conductive portion. This application, by electrically connecting the first and second electrodes formed on the flexible circuit board to the first and second conductive portions disposed on the substrate, eliminates the need for wire connections, avoiding the risk of short circuits caused by solder joints, and improving assembly efficiency by eliminating the need for manual wiring. Furthermore, the use of a flexible circuit board saves space around the substrate.

Description

Technical Field

[0001] This application relates to the field of smoking device technology, and more particularly to a heater and a smoking device including the heater. 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 type of low-temperature heating non-combustible smoking device mainly involves coating a base material with a far-infrared electrothermal coating and a conductive coating. The conductive coating needs to be connected to a PCB (Printed Circuit Board) or other components via external wires. When energized, the far-infrared electrothermal coating emits far-infrared rays that penetrate the base material to heat the aerosol-forming matrix within the base material. Because far-infrared rays have strong penetrability, they can penetrate the periphery of the aerosol-forming matrix and enter the interior, resulting in more uniform heating of the aerosol-forming matrix.

[0004] The existing smoking devices have the following problems: on the one hand, the wires connected to the conductive coating need to be manually arranged, resulting in low assembly efficiency; on the other hand, the temperature of the substrate is high during the heating process, which can easily cause short circuits in the wires due to the molten adhesive, posing a great safety hazard. Summary of the Invention

[0005] This application provides a heater and a smoking appliance including the heater, aiming to solve the problems of existing smoking appliances where the wires connected to the conductive coating need to be manually arranged and the wires are prone to short circuits caused by sol-gel.

[0006] A first aspect of this application provides a heater, the heater comprising:

[0007] The substrate has a surface;

[0008] An infrared electrothermal coating is disposed on the surface of the substrate; the infrared electrothermal coating is used to generate infrared radiation to heat the aerosol forming matrix to generate inhalable aerosols.

[0009] The conductive module includes a first conductive part and a second conductive part disposed on the substrate, and both the first conductive part and the second conductive part are electrically connected to the infrared electrothermal coating.

[0010] A flexible circuit board includes a flexible substrate and a first electrode and a second electrode formed on the flexible substrate;

[0011] The flexible substrate is fixed to the surface of the base, such that the first electrode is electrically connected to the first conductive part and the second electrode is electrically connected to the second conductive part.

[0012] A second aspect of this application provides a smoking device, the smoking device including a housing assembly and the heater described in the first aspect; the heater is disposed within the housing assembly.

[0013] The heater and smoking device including the heater provided in this application are electrically connected to the first and second conductive parts disposed on the substrate through the first and second electrodes formed on the flexible circuit board. On the one hand, it eliminates the need for wire connection, avoids the risk of short circuit in the wire sol, and improves assembly efficiency by eliminating the need for manual wiring. On the other hand, the use of the flexible circuit board saves space around the substrate. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the heater provided in Embodiment 1 of this application;

[0016] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0017] Figure 3 This is a schematic diagram of the substrate in the heater provided in Embodiment 1 of this application;

[0018] Figure 4 This is a schematic diagram of another substrate in the heater provided in Embodiment 1 of this application;

[0019] Figure 5 This is a schematic diagram of another substrate in the heater provided in Embodiment 1 of this application;

[0020] Figure 6 This is a schematic diagram of another substrate in the heater provided in Embodiment 1 of this application;

[0021] Figure 7 This is a schematic diagram of the flexible circuit board in the heater provided in Embodiment 1 of this application after being unfolded;

[0022] Figure 8 This is a schematic diagram of another flexible circuit board in the heater provided in Embodiment 1 of this application after being unfolded;

[0023] Figure 9This is a schematic diagram of another flexible circuit board in the heater provided in Embodiment 1 of this application after being unfolded;

[0024] Figure 10 This is a schematic diagram of another flexible circuit board in the heater provided in Embodiment 1 of this application after being unfolded;

[0025] Figure 11 This is a schematic diagram of the retaining ring in the heater provided in Embodiment 1 of this application;

[0026] Figure 12 This is a schematic diagram of the heater and main control circuit board provided in Embodiment 1 of this application;

[0027] Figure 13 This is a schematic diagram of the flexible substrate in the heater provided in Embodiment 1 of this application;

[0028] Figure 14 This is a schematic diagram of a smoking device provided in Embodiment 2 of this application;

[0029] Figure 15 yes Figure 14 A schematic diagram of its breakdown. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] Implementation Method 1

[0033] like Figures 1-3 As shown, this is a heater provided in Embodiment 1 of this application. The heater includes a substrate 1, a conductive module 11, an infrared electrothermal coating 12, and a flexible circuit board 2.

[0034] The substrate 1 has a first end and a second end, which extend longitudinally between the first end and the second end and are hollow inside, forming a chamber for accommodating the aerosol-forming matrix. The substrate 1 can be cylindrical, prismatic, or other cylindrical in shape. The substrate 1 is preferably cylindrical, and the chamber is a cylindrical hole penetrating the middle of the substrate 1. The inner diameter of the hole is slightly larger than the outer diameter of the aerosol-forming article or smoking article, so as to facilitate placing the aerosol-forming article or smoking article in the chamber for heating.

[0035] The substrate 1 can be made of high-temperature resistant and transparent materials such as quartz glass, ceramics or mica, or other materials with high infrared transmittance, such as high-temperature resistant materials with infrared transmittance of more than 95%, but no specific limitation is made here.

[0036] 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 or a smoking article.

[0037] 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. Preferred aerosol-forming matrices may include homogeneous tobacco materials, such as deciduous tobacco. 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. Preferred aerosol forming agents are polyhydroxy alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol and most preferably glycerol.

[0038] An infrared electrothermal coating 12 is applied to the surface of the substrate 1. The infrared electrothermal coating 12 can be applied to the outer surface of the substrate 1 or to the inner surface of the substrate 1. Preferably, the infrared electrothermal coating 12 is applied to the outer surface of the substrate 1.

[0039] The infrared electrothermal coating 12 generates heat energy when energized, thereby producing 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 the embodiments of this application, 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.

[0040] The infrared electrothermal coating 12 is preferably made by thoroughly mixing far-infrared electrothermal ink, ceramic powder, and inorganic binder, then coating it onto the outer surface of the substrate 1, and then drying and curing it for a certain period of time. The thickness of the infrared electrothermal coating 12 is 30μm-50μm. Of course, the infrared electrothermal coating 12 can also be made by mixing tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride, and anhydrous copper sulfate in a certain proportion and then coating it onto the outer surface of the substrate 1; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, or a zirconium-titanium nitrogen layer. The coating can be one of the following: a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt oxide ceramic layer, a nickel-cobalt nitride ceramic layer, a nickel-cobalt boride ceramic layer, a nickel-cobalt carbide ceramic layer, or a high-silicon molecular sieve ceramic layer; the infrared electrothermal coating 12 can also be a coating of other existing materials.

[0041] In one example, the heater further includes a protective layer (not shown) coated on the infrared electrothermal coating 12 and / or a protective structural member disposed on the infrared electrothermal coating 12. The protective layer may be one or a combination of two of the following: a polytetrafluoroethylene layer, a glaze layer, or a protective layer made of other high-temperature resistant materials. The protective structural member may be an assembly or component that separates an aerosol-forming article or smoking article from the infrared electrothermal coating 12, and a gap may exist between the protective structural member and the infrared electrothermal coating 12 or the aerosol-forming article. The protective layer and / or the protective structural member prevent wear on the infrared electrothermal coating 12 caused by, for example, aerosol-forming articles (e.g., cigarettes) entering or exiting the chamber.

[0042] The conductive module 11 includes a first conductive portion 111 and a second conductive portion 112 disposed on the substrate 1. Both the first conductive portion 111 and the second conductive portion 112 are at least partially electrically connected to the infrared electrothermal coating 12, allowing current to flow from one conductive portion to the other via the infrared electrothermal coating 12. The first conductive portion 111 and the second conductive portion 112 have opposite polarities; for example, the first conductive portion 111 is positive and the second conductive portion 112 is negative; or the first conductive portion 111 is negative and the second conductive portion 112 is positive. Preferably, the infrared electrothermal coating 12 is coated on the outer surface of the substrate 1, with the first conductive portion 111 disposed on the outer surface of the substrate 1 near the first end and the second conductive portion 112 disposed on the outer surface of the substrate 1 near the second end. If the infrared electrothermal coating 12 is coated on the inner surface of the substrate 1, the conductive module 11 can also be disposed on the inner surface of the substrate 1, or span across the inner and outer surfaces of the substrate 1.

[0043] In this example, both the first conductive part 111 and the second conductive part 112 are annular (ring-shaped conductive parts). The first conductive part 111 and the second conductive part 112 can be annular conductive coatings coated on the outer surface of the substrate 1 near the first end and the second end. The conductive coating can be a metal coating or conductive tape, etc. The metal coating can include silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium or the above metal alloy materials; or it can be annular conductive sheets sleeved on the outer surface of the substrate 1 near the first end and the second end. The conductive sheets are metal conductive sheets, such as copper sheets, steel sheets, etc.

[0044] Please refer to Figure 4 As shown, in one example, the conductive module 11 includes a first conductive portion 111, a second conductive portion 112, and a third conductive portion 113. The first conductive portion 111, the second conductive portion 112, and... Figure 3 Similarly, refer to the foregoing content. A third conductive part 113 is disposed on the outer surface of the substrate 1 between the first conductive part 111 and the second conductive part 112. The third conductive part 113 is electrically connected to the infrared electrothermal coating 12. The third conductive part 113 divides the infrared electrothermal coating 12 into two heating regions along the longitudinal direction of the substrate 1 (shown as 121 and 122 in the figure) to achieve segmented heating of the aerosol-forming matrix within the chamber. In this embodiment, the third conductive part 113 divides the infrared electrothermal coating 12 into two heating regions, and segmented heating of the aerosol-forming matrix within the chamber can be achieved by controlling the on / off state of the first conductive part 111, the second conductive part 112, and the third conductive part 113.

[0045] Please refer to Figure 5 As shown, in one example, the conductive module 11 includes a first conductive portion 111, a second conductive portion 112, a third conductive portion 113, and a fourth conductive portion 114. The first conductive portion 111, the second conductive portion 112, and... Figure 3Similarly, refer to the foregoing content. The third conductive portion 113 extends from the second conductive portion 112 along the longitudinal direction of the substrate 1 (direction toward the first conductive portion 111), and the fourth conductive portion 114 extends from the first conductive portion 111 along the longitudinal direction of the substrate 1 (direction toward the second conductive portion 112). That is, both the third conductive portion 113 and the fourth conductive portion 114 are elongated conductive portions along the longitudinal direction of the substrate 1. Thus, with... Figure 3 Compared to the example where the current flows from the first end to the second end of the substrate 1 along the longitudinal direction of the substrate 1 (e.g., from the first conductive part 111 to the second conductive part 112), the current in this example flows along the circumferential direction of the substrate 1, which shortens the current flow distance in the infrared electrothermal coating 12 and reduces the resistance of the infrared electrothermal coating 12 in the current path.

[0046] Please refer to Figure 6 As shown, in one example, the conductive module 11 includes a first conductive portion 111 and a second conductive portion 112, which are connected to... Figure 3 The difference is that both the first conductive part 111 and the second conductive part 112 are elongated conductive parts, and are arranged along the longitudinal direction of the substrate 1. Similarly, with Figure 3 Compared to the example where the current flows from the first end to the second end of the substrate 1 along the longitudinal direction of the substrate 1 (e.g., from the first conductive part 111 to the second conductive part 112), the current in this example flows along the circumferential direction of the substrate 1, which shortens the current flow distance in the infrared electrothermal coating 12 and reduces the resistance of the infrared electrothermal coating 12 in the current path.

[0047] Please refer to Figure 7 As shown, the flexible circuit board 2 includes a flexible substrate 20, a first electrode 21 and a second electrode 22 formed on the flexible substrate 20, and a temperature acquisition module 23 for acquiring temperature data of the substrate 1.

[0048] The flexible substrate 20 is fixed to the surface of the base 1, such that the first electrode 21 is electrically connected to the first conductive part 111 and the second electrode 22 is electrically connected to the second conductive part 112. The temperature acquisition module 23 is positioned at or near a target location on the surface of the base 1. This target location is a preset position suitable for acquiring temperature data from the base 1, which can be determined by user experience or experimental testing. Generally, the temperature acquisition module 23 is positioned corresponding to the area of ​​the infrared electrothermal coating 12. Since the temperature acquisition module 23 is integrated into the flexible circuit board 2, its position is relatively stable when the flexible circuit board 2 covers the base 1, ensuring consistent temperature data acquisition and facilitating control of the heater's heating temperature.

[0049] The flexible substrate 20 includes a covered portion (shown as A in the figure) covering the surface of the substrate 1, and an extension portion (shown as B in the figure) not covering the surface of the substrate 1. The extension portion B extends from one end of the covered portion A in a longitudinal direction away from the substrate 1. The extension portion B has multiple connecting parts 24 for connecting to external components. The first electrode 21, the second electrode 22, and the temperature acquisition module 23 are respectively connected to the connecting parts 24 via conductive lines. The connecting parts 24 include, but are not limited to, solder joints, solder holes, pads, vias, terminals, and other electrically connected components. The first electrode 21 and the second electrode 22 can be extended to a position away from the substrate 1, such as the location of the connecting parts 24, through the extension portion B and the conductive lines.

[0050] by Figure 12 For example, the connecting component 24 is a solder pad used to connect to the main control circuit board 4. The main control circuit board 4 is used to control the heating temperature of the heater and manage the battery of the smoking device. In the prior art, multiple wires are usually directly soldered to the main control circuit board 4. The problem with this method is that, on the one hand, the temperature of the substrate is high during the heating process, which can easily cause short circuits in the wires due to the molten adhesive, posing a great safety hazard; on the other hand, the large number of solder joints increases the soldering process and poses a risk of incorrect soldering or connection. In this example, a connector (or pin) 5 is used, with one end soldered to the solder pad on the extension part B and the other end soldered to the main control circuit board 4, which effectively avoids the problems of the existing method and saves space.

[0051] After the covering portion A is curled (covering the surface of the substrate 1, with the curling direction indicated by the arrow in the figure), it can form a shape suitable for the outer surface of the cylindrical substrate 1, and cover the entire outer surface of the substrate 1. The width of the covering portion A along the unfolding direction (opposite to the arrow in the figure) is greater than the width of the extension portion B along the unfolding direction.

[0052] It should be noted that in other examples, it is also possible for the covered portion A to be rolled up to cover a portion of the surface of the substrate 1, for example, to cover the infrared electrothermal coating 12 between the first conductive portion 111 and the second conductive portion 112. In other examples, it is also possible for the flexible substrate 20 to cover only portion A.

[0053] In this example, when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is in at least partial area contact with the first conductive portion 111, and the second electrode 22 is in at least partial area contact with the second conductive portion first electrode 112, ensuring that the first electrode 21 and the first conductive portion 111 maintain electrical contact, and the second electrode 22 and the second conductive portion 112 maintain electrical contact. The following references... Figures 3-10 Explanation:

[0054] Please combine Figure 3and Figure 7 To understand this, in this example, both the first electrode 21 and the second electrode 22 formed on the flexible substrate 20 are elongated electrode portions in the transverse direction (refer to the transverse direction of the substrate 1 or the direction shown by the arrow in the figure). After the flexible substrate 20 is rolled up, both the first electrode 21 and the second electrode 22 form annular electrodes, and the annular electrodes and Figure 3 The annular conductive portions (first conductive portion 111 and second conductive portion 112) correspond to each other, so that when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is in contact with the first conductive portion 111 and the second electrode 22 is in contact with the second conductive portion 112.

[0055] Please refer to Figure 5 and Figure 8 To understand this, in one example, the first electrode 21 formed on the flexible substrate 20 includes a transversely elongated electrode portion 211 and a longitudinally elongated electrode portion 212 (referring to the longitudinal direction of the substrate 1) extending longitudinally from the elongated electrode portion 211. The second electrode 22 includes a transversely elongated electrode portion 221 and a longitudinally elongated electrode portion 222 (extending longitudinally from the elongated electrode portion 221). After the flexible substrate 20 is rolled up, the elongated electrode portions 211 and 221 form a ring-shaped electrode, which... Figure 5 The shapes of the annular conductive portions (first conductive portion 111 and second conductive portion 112) correspond to each other; the elongated electrode portion 212 and the elongated electrode portion 222 form an elongated electrode in the longitudinal direction, which is related to... Figure 5 The shapes of the elongated conductive portions (third conductive portion 113 and fourth conductive portion 114) correspond to each other, so that when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is in contact with the first conductive portion 111 and the second electrode 22 is in contact with the second conductive portion 112.

[0056] It should be noted that, for Figure 8 The annular conductive portion and the elongated conductive portion shown are shown. It is also feasible for the electrodes formed on the flexible substrate 20 to be only the elongated electrode portion 211 and the elongated electrode portion 221 in the transverse direction; or it is also feasible for the electrodes formed on the flexible substrate 20 to be only the elongated electrode portion 212 and the elongated electrode portion 222 in the longitudinal direction.

[0057] Please refer to Figure 6 and Figure 9To understand this, in one example, both the first electrode 21 and the second electrode 22 formed on the flexible substrate 20 are elongated electrode portions in the longitudinal direction. After the flexible substrate 20 is rolled up, both the first electrode 21 and the second electrode 22 form elongated electrodes in the longitudinal direction, and the elongated electrodes are... Figure 6 The shapes of the elongated conductive portions (first conductive portion 111 and second conductive portion 112) correspond to each other, so that when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is in contact with the first conductive portion 111 and the second electrode 22 is in contact with the second conductive portion 112.

[0058] Please refer to Figure 6 and Figure 10 To understand this, in one example, the first electrode 21 and the second electrode 22 formed on the flexible substrate 20 are both elongated strip-shaped electrode portions in the transverse direction. After the flexible substrate 20 is rolled up, the first electrode 21 and the second electrode 22 form two arc-shaped electrodes at one end of the substrate 1, and the arc-shaped electrodes and Figure 6 The elongated conductive portions (first conductive portion 111 and second conductive portion 112) correspond to each other, so that when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 remains in contact with the first conductive portion 111, and the second electrode 22 remains in contact with the second conductive portion 112. It should be noted that it is also feasible if both the first conductive portion 111 and the second conductive portion 112 are elongated conductive portions extending from one end of the substrate 1 to the other end (approximately spiral-shaped on the surface of the substrate 1).

[0059] In this example, both the first electrode 21 and the second electrode 22 are formed at one end of the flexible substrate 20. After the flexible substrate 20 is rolled up, the lengths of the two arc-shaped electrodes formed by the first electrode 21 and the second electrode 22 at one end of the substrate 1 are both less than the circumferential distance between the elongated conductive portions. For example, Figure 10 d1 and d2 are less than Figure 6 In D12; the spacing between the two arc-shaped electrodes is greater than the circumferential width of the elongated conductive section, for example, Figure 10 d12 is greater than Figure 6 D22 in the middle.

[0060] It should be noted that in other examples, the first electrode 21 and the second electrode 22 can be formed at both ends, the middle or other positions on the flexible substrate 20, which is also feasible.

[0061] In one example (not shown in the figures), both the first electrode 21 and the second electrode 22 are elongated electrode portions extending from one end of the flexible substrate 2 to the other (generally in the shape of a diagonal line, a curve, or other shapes on the flexible substrate 2). Both the first conductive portion 111 and the second conductive portion 112 are elongated conductive portions extending from one end of the substrate 1 to the other (generally in the shape of a spiral on the surface of the substrate 1).

[0062] After the flexible substrate 20 is rolled up, the electrodes formed by the first electrode 21 and the second electrode 22 (which can be oblique-shaped electrodes, curved-shaped electrodes, spiral-shaped electrodes, etc.) correspond to the elongated conductive parts (first conductive part 111 and second conductive part 112), so that when the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is in contact with the first conductive part 111 and the second electrode 22 is in contact with the second conductive part 112.

[0063] Please refer to Figure 4 To understand this, in one example, the flexible circuit board 2 includes a flexible substrate 20, and a first electrode 21, a second electrode 22, and a third electrode (not shown in the figures) formed on the flexible substrate 20. The shape of the third electrode can be referred to the example above.

[0064] When the flexible substrate 20 covers the surface of the substrate 1, the first electrode 21 is electrically connected to the first conductive part 111, the second electrode 22 is electrically connected to the second conductive part 112, and the third electrode is electrically connected to the third conductive part 113.

[0065] In this example, in order to ensure the heating effect of the heater, the first electrode 21 and the second electrode 22 need to carry a large current. Therefore, the line width of the first electrode 21 and the second electrode 22 can be set to 0.2mm to 3mm, and preferably the line width of the first electrode 21 and the second electrode 22 is set to 0.2mm to 1mm.

[0066] Please combine Figure 11 To understand this, in one example, to better secure the first electrode 21 to the first conductive part 111, and the second electrode 22 to the second conductive part 112, ensuring electrical connection between the electrodes and the conductive parts, the heater also includes a first fixing member and a second fixing member (…). Figure 11 (Structural component shown in Figure 3); the first fixing member fixes the first electrode 21 to the first conductive part 111, and the second fixing member fixes the second electrode 22 to the second conductive part 112.

[0067] In this example, both the first and second fixing members are fixing rings with fracture notches (shown as a in the figure), and the inner diameter of the fixing ring is smaller than the outer diameter of the base 1. The small inner diameter and the fracture notch ensure that the fixing ring is fitted onto the base 1 with a certain amount of interference, ensuring that the electrode and the conductive part are tightly fitted while maintaining a certain degree of elasticity.

[0068] Please combine Figure 13 To understand this, in one example, the flexible substrate 20 is a polyimide film, which includes a first polyimide layer 201, a second polyimide layer 203, and a circuit layer 202, wherein at least a portion of the circuit layer 202 is positioned between the first polyimide layer 201 and the second polyimide layer 203.

[0069] In this example, the temperature acquisition module 23 can be a conductive material with a temperature coefficient of resistance, which is disposed on the circuit layer 202.

[0070] In one example, the heater also includes a hollow heat insulation tube;

[0071] The heat insulation tube is wrapped around the flexible circuit board 2. The heat insulation tube can prevent a large amount of heat from being transferred to the outer shell of the smoking device, which would cause the user to feel hot to the touch.

[0072] In this example, since the infrared electrothermal coating 12 has the phenomenon of heat diffusion by conduction or convection, a reflective coating can also be applied to the inner surface of the heat insulation tube to reflect the infrared rays emitted by the infrared electrothermal coating 12 on the substrate 1 back into the substrate 1 to heat the aerosol forming matrix located in the cavity and improve heating efficiency; on the other hand, it can also play a heat insulation role to prevent the outer shell temperature of the smoke appliance from being too high and reducing the user experience.

[0073] In this example, the reflective coating comprises at least one of a metal and a metal oxide. Specifically, it may be made of one or more of gold, silver, nickel, aluminum, gold alloys, silver alloys, nickel alloys, aluminum alloys, oxides of gold, oxides of silver, oxides of nickel and oxides of aluminum, titanium oxide, zinc oxide, and cerium dioxide. The thickness of the reflective coating is between 0.3 μm and 200 μm.

[0074] In this example, the insulation tube includes insulation material, which can be insulation adhesive, aerogel, aerogel felt, asbestos, aluminum silicate, calcium silicate, diatomaceous earth, zirconium oxide, etc. The insulation tube may also include a vacuum insulation tube.

[0075] Implementation Method 2

[0076] Figures 14-15 This application provides a smoking device 100 according to Embodiment 2, which includes a housing assembly 6 and the aforementioned heater, with the heater disposed within the housing assembly 6. In this example, the smoking device 100 has an infrared electrothermal coating 12 and a first conductive portion 111 and a second conductive portion 112 electrically connected to the infrared electrothermal coating 12 on the outer surface of the substrate 1. The infrared electrothermal coating 12 can emit infrared rays to radiate and heat the aerosol-forming matrix within the cavity of the substrate 1.

[0077] The housing assembly 6 includes an outer shell 61, a fixed shell 62, a fastener 63, and a bottom cover 64. The fixed shell 62 and the fastener 63 are both fixed inside the outer shell 61. The fastener 63 is used to fix the base 1 and is disposed inside the fixed shell 62. The bottom cover 64 is disposed at one end of the outer shell 61 and covers the outer shell 61. Specifically, the fixing component 63 includes an upper fixing seat 631 and a lower fixing seat 632. Both the upper fixing seat 631 and the lower fixing seat 632 are located inside the fixing shell 62. The first end and the second end of the base 1 are respectively fixed on the upper fixing seat 631 and the lower fixing seat 632. An air inlet pipe is protruding from the bottom cover 64. The end of the lower fixing seat 632 facing away from the upper fixing seat 631 is connected to the air inlet pipe. The upper fixing seat 631, the base 1, the lower fixing seat 632 and the air inlet pipe are coaxially arranged. The base 1 is sealed with the upper fixing seat 631 and the lower fixing seat 632. The lower fixing seat 632 is also sealed with the air inlet pipe. The air inlet pipe is connected to the outside air so that the user can smoothly inhale when suctioning.

[0078] The smoking device 100 also includes a flexible circuit board 2, a fixing ring 3, a main control circuit board 4, a power strip 5, and a battery 8. Two fixing rings 3 are respectively fitted onto the first and second ends of the base 1. The flexible circuit board 2 covers the periphery of the base 1. One end of the power strip 5 is soldered to the connecting component 24 (pad) of the flexible circuit board 2, and the other end is soldered to the main control circuit board 4. The fixed shell 62 includes a front shell 621 and a rear shell 622, which are fixedly connected. The main control circuit board 4 and the battery 8 are both housed within the fixed shell 62. The battery 8 is electrically connected to the main control circuit board 4, and the flexible circuit board 2 is also electrically connected to the main control circuit board 4. A button protrudes from the outer shell 61. By pressing the button, the infrared electrothermal coating 12 on the outer surface of the base 1 can be energized or de-energized. The main control circuit board 4 is also connected to a charging interface, which is exposed on the bottom cover 64. Users can charge or upgrade the smoking device 100 through the charging interface to ensure its continuous use.

[0079] The smoking device 100 also includes a heat insulation tube 7, which is disposed inside the fixed shell 62 and sleeved on the outside of the base 1. The heat insulation tube 7 can prevent a large amount of heat from being transferred to the outer shell 61, causing the user to feel hot. Specifically, the heat insulation tube 7 is also coated with a reflective coating to reflect the infrared radiation emitted by the infrared electrothermal coating 12 on the base 1 back into the base 1 to heat the aerosol forming matrix located in the cavity, thereby improving heating efficiency.

[0080] The flexible circuit board 2 integrates an NTC temperature sensor to detect the real-time temperature of the substrate 1 and transmits the detected real-time temperature to the main control circuit board 4. The main control circuit board 4 adjusts the current flowing through the infrared electrothermal coating 12 based on this real-time temperature. Specifically, when the NTC temperature sensor detects a low real-time temperature inside the substrate 1, for example, when the temperature inside the substrate 1 is less than 150°C, the main control circuit board 4 controls the battery 8 to output a higher voltage to the conductive module 11, thereby increasing the current fed into the infrared electrothermal coating 12, increasing the heating power of the aerosol forming matrix, and reducing the waiting time for the user to take their first puff. When the NTC temperature sensor detects a temperature of 150°C-200°C in the substrate 1, the main control circuit board 4 controls the battery 8 to output a normal voltage to the conductive module 11. When the NTC temperature sensor detects that the temperature of the substrate 1 is between 200℃ and 250℃, the main control circuit board 4 controls the battery 8 to output a lower voltage to the conductive module 11; when the NTC temperature sensor detects that the temperature inside the substrate 1 is 250℃ or higher, the main control circuit board 4 controls the battery 8 to stop outputting voltage to the conductive module 11.

[0081] 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, The heater includes: The substrate has a surface; An infrared electrothermal coating is disposed on the surface of the substrate; the infrared electrothermal coating is used to generate infrared radiation to heat the aerosol forming matrix to generate inhalable aerosols. The conductive module includes a first conductive part and a second conductive part disposed on the substrate, and both the first conductive part and the second conductive part are electrically connected to the infrared electrothermal coating. A flexible circuit board includes a flexible substrate and a first electrode and a second electrode formed on the flexible substrate; The flexible substrate is fixed to the surface of the base, such that the first electrode is electrically connected to the first conductive part and the second electrode is electrically connected to the second conductive part. The flexible substrate includes a covered portion and an extended portion; The covering portion covers at least a portion of the substrate surface. When the flexible substrate covers the substrate surface, the first electrode and the first conductive portion are in at least partial area contact, and the second electrode and the second conductive portion are in at least partial area contact. The extension portion is used to extend the first electrode and the second electrode to a position away from the substrate via conductive lines. The flexible circuit board also includes a connection component for electrical connection with external components. The connection component is formed in the extension portion, and the first electrode and the second electrode are electrically connected to the connection component via the conductive lines.

2. The heater according to claim 1, characterized in that, The coating portion is shaped to fit the surface of the substrate, and the coating portion covers the infrared electrothermal coating between the first conductive portion and the second conductive portion; or, the coating portion covers the entire surface of the substrate.

3. The heater according to claim 1, characterized in that, The extension portion extends longitudinally from one end of the covering portion.

4. The heater according to claim 1, characterized in that, The width of the covering portion along the unfolding direction is greater than the width of the extending portion along the unfolding direction.

5. The heater according to claim 1, characterized in that, The first electrode includes a first elongated electrode portion, and the second electrode includes a second elongated electrode portion; both the first conductive portion and the second conductive portion include annular conductive portions; When the flexible substrate covers the surface of the substrate, both the first elongated electrode portion and the second elongated electrode portion form arc-shaped electrodes or ring-shaped electrodes, and are electrically connected to the ring-shaped conductive portion respectively.

6. The heater according to claim 1, characterized in that, The first electrode includes a third elongated electrode portion, and the second electrode includes a fourth elongated electrode portion; both the first conductive portion and the second conductive portion include elongated conductive portions. When the flexible substrate covers the surface of the substrate, the third elongated electrode portion and the fourth elongated electrode portion both form arc-shaped electrodes and are electrically connected to the elongated conductive portion respectively.

7. The heater according to claim 6, characterized in that, Both the third elongated electrode portion and the fourth elongated electrode portion are disposed at one end of the flexible substrate.

8. The heater according to claim 7, characterized in that, The length of each arc-shaped electrode is less than the circumferential distance between the elongated conductive parts, and the spacing between each arc-shaped electrode is greater than the circumferential width of the elongated conductive parts.

9. The heater according to claim 1, characterized in that, The linewidth of the first electrode and the second electrode is 0.2mm to 3mm.

10. The heater according to claim 1, characterized in that, The flexible substrate is a polyimide film, which includes a first polyimide layer, a second polyimide layer, and a circuit layer, wherein at least a portion of the circuit layer is positioned between the first polyimide layer and the second polyimide layer.

11. The heater according to claim 1, characterized in that, The flexible circuit board also includes a temperature acquisition module formed on the flexible substrate, the temperature acquisition module being used to acquire temperature data of the substrate.

12. The heater according to claim 1, characterized in that, The conductive module further includes a third conductive part disposed on the substrate. The third conductive part is located between the first conductive part and the second conductive part. The third conductive part is electrically connected to the infrared electrothermal coating. The third conductive part divides the infrared electrothermal coating into two heating regions along the longitudinal direction of the substrate to achieve segmented heating of the aerosol forming matrix. The flexible circuit board further includes a third electrode formed on the flexible substrate, the third electrode being electrically connected to the third conductive portion.

13. The heater according to claim 1, characterized in that, The heater further includes a fixing member for fixing the first electrode to the first conductive part and / or fixing the second electrode to the second conductive part.

14. The heater according to claim 13, characterized in that, The fastener is a fixing ring with a fracture notch, and the inner diameter of the fixing ring is smaller than the outer diameter of the base.

15. A smoking device, characterized in that, The smoking device includes a housing assembly and a heater as described in any one of claims 1-14; the heater is disposed within the housing assembly.

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