Heater and aerosol generator including the heater

Abstract

The present invention relates to a heater (11) and an aerosol generating device (100). The heater (11) includes a substrate (110), an infrared electrothermal coating (111), and a conductive element including a first conductive electrode (112a), a second conductive electrode (112b), and at least one connection electrode (113a, 113b). At least one connection electrode (113a, 113b) is used to divide the infrared electrothermal coating (111) into at least two sub-infrared electrothermal coatings (A1, A2) connected in series between the first conductive electrode (112a) and the second conductive electrode (112b). The first conductive electrode (112a) is arranged to receive the inflow of an external current. The inflowing current flows out from the second conductive electrode (112b) after sequentially passing through at least two sub-infrared electrothermal coatings (A1, A2) connected in series. The sub-infrared electrothermal coatings (A1, A2) simultaneously start heating the aerosol-forming substrate. Thereby, the problem that the resistance value of the far-infrared coating is large is avoided, and the smoking experience of the user is improved.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of a prior application with the application number 202210862107.1 and the title "Heater and Aerosol Generator Comprising the Heater", which was filed with the China National Intellectual Property Administration on July 21, 2022, and the content of the above - mentioned prior application is incorporated herein by reference.

[0002] This application relates to the technical field of electronic atomization, and particularly to a heater and an aerosol generator comprising the heater.

Background Art

[0003] In a conventional aerosol generator, mainly, a far - infrared coating and a conductive coating are applied on the outer surface of a substrate. After being energized, the far - infrared coating emits far - infrared rays that penetrate the substrate to heat the aerosol - forming substrate inside the substrate. Since far - infrared rays have a strong penetration power and can penetrate around the aerosol - forming substrate and enter the interior, the heating of the aerosol - forming substrate becomes uniform.

[0004] The aerosol generator has a problem that, because the resistance value of the far - infrared coating is large, the pre - heating time of the aerosol - forming substrate becomes long, which affects the smoking experience of users.

Summary of the Invention

[0005] This application aims to solve the problem existing in the conventional aerosol generator that the resistance value of the far - infrared coating is large, and provides a heater and an aerosol generator comprising the heater.

[0006] In one aspect, this application provides a substrate, an infrared electro - thermal coating provided on the surface of the substrate and used for generating infrared rays that radiatively heat the aerosol - forming substrate after being energized, A conductive element including a first conductive electrode, a second conductive electrode, and at least one connection electrode provided on the surface of the substrate and spaced apart from each other; The at least one connection electrode is used to divide the infrared electrothermal coating into at least two sub-infrared electrothermal coatings connected in series between the first conductive electrode and the second conductive electrode; One of the first conductive electrode and the second conductive electrode is arranged to receive the inflow of an external current, and the inflowing current passes sequentially through the at least two sub-infrared electrothermal coatings connected in series and then flows out from the other of the first conductive electrode and the second conductive electrode, providing a heater.

[0007] In another aspect, the present application provides an aerosol generating device including a power supply for power supply and the heater.

[0008] The heater provided in the present application and the aerosol generating device including the heater divide the infrared electrothermal coating into at least two sub-infrared electrothermal coatings connected in series between the first conductive electrode and the second conductive electrode by the connection electrode, and the sub-infrared electrothermal coatings connected in series start heating the aerosol forming substrate simultaneously. Thereby, the problem that the resistance value of the far-infrared coating is large is avoided, and the smoking experience of the user is improved.

Brief Description of the Drawings

[0009] One or more embodiments are exemplarily illustrated by the figures in the corresponding drawings, but these exemplary descriptions do not limit the embodiments, and elements with the same reference numerals in the drawings indicate similar elements, and unless otherwise specified, the figures in the drawings do not limit the proportion.

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0011] To facilitate the understanding of the present application, the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be noted that when an element is described as being "fixed" to another element, it may be directly located on the other element or there may be one or more intervening elements therebetween. When an element is described as being "connected" to another element, it may be directly connected to the other element or there may be one or more intervening elements therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and similar descriptions used in this specification are for illustrative purposes only.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In this specification, the terms used in the description of this application are only for the purpose of describing specific embodiments and do not limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0013] FIGS. 1 to 2 show an aerosol generating device 100 provided in an embodiment of the present application. The aerosol generating device 100 includes a housing assembly 6 and a heater 11. The heater 11 is provided within the housing assembly 6. The heater 11 can generate inhalable aerosol by emitting infrared rays to heat the aerosol-forming substrate.

[0014] The housing assembly 6 includes an outer housing 61, a fixed housing 62, a base, and a bottom cover 64. The fixed housing 62 and the base are both fixed within the outer housing 61. Here, the base is used to fix the heater 11 and is provided within the fixed housing 62. The bottom cover 64 is provided at one end of the outer housing 61 and covers the outer housing 61. The fixed housing 62 is provided with an insertion port, and the aerosol-forming substrate is removably received or inserted into the heater 11 through the insertion port.

[0015] The base includes a base 15 sleeve-connected to the upper end of the heater 11 and a base 13 sleeve-connected to the lower end of the heater 11. Both the base 15 and the base 13 are provided within the fixed housing 62. An intake pipe 641 protrudes from the bottom cover 64. One end of the base 13 opposite to the base 15 is connected to the intake pipe 641. The base 15, the heater 11, the base 13, and the intake pipe 641 are coaxially provided. The spaces between the heater 11 and the base 15, and the base 13 are sealed by a sealing material, and the base 13 and the intake pipe 641 are also sealed. The intake pipe 641 communicates with the outside air so that the user can inhale smoothly during smoking.

[0016] The aerosol generating device 100 further includes a circuit board 3 and a battery cell 7. The fixed housing 62 includes a fixedly connected front housing 621 and a rear housing 622. Both the circuit board 3 and the battery cell 7 are provided within the fixed housing 62. The battery cell 7 is electrically connected to the circuit board 3. The button 4 protrudes from the external housing 61. By pressing the button 4, energization or non-energization of the heater 11 can be achieved. The circuit board 3 is further connected to a charging interface 31 exposed on the bottom cover 64. The user can charge or upgrade the aerosol generating device 100 through the charging interface 31 to ensure the continuous use of the aerosol generating device 100.

[0017] The aerosol generating device 100 further includes a heat insulation tube 17. The heat insulation tube 17 is provided within the fixed housing 62 and around the heater 11, which can avoid the user feeling heat due to a large amount of heat being transmitted to the external housing 61. The heat insulation tube can include a heat insulation material such as heat insulation gel, aerogel, aerogel felt, asbestos, aluminum silicate, calcium silicate, diatomaceous earth, zirconium oxide, etc. The heat insulation tube may be a vacuum heat insulation tube. An infrared reflection coating may be further formed within the heat insulation tube 17 to reflect the infrared rays radiated from the heater 11 in the direction of the aerosol forming substrate and improve the heating efficiency.

[0018] The aerosol generating device 100 further includes a temperature sensor 2 such as an NTC temperature sensor. The temperature sensor 2 is used to detect the real-time temperature of the heater 11 and transmit the detected real-time temperature to the circuit board 3. The circuit board 3 adjusts the magnitude of the current flowing through the heater 11 based on the real-time temperature. Specifically, it is as follows.

[0019] When the NTC temperature sensor detects that the real-time temperature of the heater 11 is low, for example, when it is detected that the temperature of the heater 11 is less than 150 °C, the circuit board 3 controls the battery cell 7 to output a high voltage to the conductive element, further increases the current supplied to the heater 11, increases the heating power of the aerosol-forming substrate, and shortens the waiting time required for the user to smoke.

[0020] When the NTC temperature sensor detects that the temperature of the heater 11 is between 150 °C and 200 °C, the circuit board 3 controls the battery cell 7 to output a normal voltage to the heater 11.

[0021] When the NTC temperature sensor detects that the temperature of the heater 11 is between 200 °C and 250 °C, the circuit board 3 controls the battery cell 7 to output a low voltage to the heater 11.

[0022] When the NTC temperature sensor detects that the temperature of the heater 11 is 250 °C or higher, the circuit board 3 controls the battery cell 7 to stop the voltage output to the heater 11.

[0023] Figures 3 to 4 are the first heater provided in the embodiment of the present application, and the heater 11 includes the following.

[0024] The base body 110 may be made of a high-temperature resistant and transparent material such as quartz glass, ceramics or mica, or may be made of other materials having a high infrared transmittance, for example, a high-temperature resistant material having an infrared transmittance of 95% or more, and is not specifically limited here.

[0025] The base body 110 is substantially tubular, preferably adopting a circular tubular shape. The hollow part inside the base body 110 defines or forms a cavity for receiving the aerosol-forming substrate. The inner diameter of the base body 110 is 7 mm to 14 mm, 7 mm to 12 mm, or 7 mm to 10 mm.

[0026] An aerosol-forming substrate is a substrate capable of releasing volatile compounds capable of forming an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate. The aerosol-forming substrate may be solid, or liquid, or may contain solid and liquid components. The aerosol-forming substrate can be loaded onto a carrier or support by adsorption, coating, dipping or other methods. For convenience, the aerosol-forming substrate may be part of an aerosol-generating product.

[0027] The aerosol-forming substrate may contain nicotine. The aerosol-forming substrate may contain tobacco such as tobacco-containing materials containing volatile tobacco flavor compounds, and when heated, the volatile tobacco flavor compounds are released from the aerosol-forming substrate. The aerosol-forming substrate may contain at least one aerosol-forming agent which can be any suitable known compound or mixture of compounds, and during use, the compound or mixture of compounds contributes to the formation of a dense and stable aerosol and is substantially resistant to thermal decomposition 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 glycerol mono-, di- or triacetate, and fatty acid esters of monovalent, divalent or polyvalent carboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate.

[0028] The infrared electrothermal coating 111 is formed on the surface of the substrate 110. The infrared electrothermal coating 111 may be formed on the outer surface of the substrate 110 or on the inner surface of the substrate 110. Preferably, the infrared electrothermal coating 111 is formed on the outer surface of the substrate 110. The length of the infrared electrothermal coating 111 extending in the axial direction of the substrate 110 is 5 mm to 40 mm, or 5 mm to 30 mm, or 5 mm to 20 mm, or 10 mm to 20 mm.

[0029] The infrared electrothermal coating 111 receives power to generate heat and further emits infrared rays of a certain wavelength, for example, far-infrared rays of 8 μm to 15 μm. When the wavelength of the infrared rays coincides with the absorption wavelength of the aerosol-forming substrate, the energy of the infrared rays is easily absorbed by the aerosol-forming substrate.

[0030] In this example, the wavelength of the infrared rays is not limited and may be infrared rays of 0.75 μm to 1000 μm, preferably far-infrared rays of 1.5 μm to 400 μm.

[0031] The infrared electrothermal coating 111 is provided at a distance from the upper end of the substrate 110, and the distance is 0.2 mm to 1 mm, which is advantageous for manufacturing and production. The infrared electrothermal coating 111 is also provided at a distance from the lower end of the substrate 110, and the distance is 1 mm to 4 mm, which is advantageous for the arrangement of the conductive electrodes and avoids the temperature at the lower end of the substrate 110 being too high. It should be noted that, when viewed from the flow direction of the aerosol, the upper end of the substrate 110 is located downstream of the lower end of the substrate 110.

[0032] The conductive element includes conductive electrodes 112a, conductive electrodes 112b, connection electrodes 113a, and connection electrodes 113b that are provided on the surface of the substrate 110 and spaced apart from each other. Being spaced apart from each other means that no two arbitrary electrodes are in direct contact so as to form a short circuit.

[0033] The conductive electrode 112a includes a connecting portion 112a1 extending in the circumferential direction of the base 110 and a conductive portion 112a2 extending axially from the connecting portion 112a1 toward the upper end of the base 110. The connecting portion 112a1 is arc-shaped, provided spaced apart from the infrared electrothermal coating 111, and provided between the infrared electrothermal coating 111 and the lower end of the base 110. A lead wire may be welded to the connecting portion 112a1 to be electrically connected to an external power source of the heater 11 such as the battery cell 7 or the voltage after conversion of the battery cell 7, or may be electrically connected to the power source via another electrical connector. The conductive portion 112a2 is strip-shaped, and the length thereof extending in the axial direction is larger than the length of the infrared electrothermal coating 111 extending in the axial direction. The conductive portion 112a2 maintains contact with the infrared electrothermal coating 111 to form an electrical connection. The structure of the conductive electrode 112b is the same as that of the conductive electrode 112a, and the conductive electrode 112b and the conductive electrode 112a are symmetrically arranged with respect to the base 110.

[0034] As can be seen from FIG. 3, the conductive portions 112a2 and 112b2 bisect the infrared electrothermal coating 111 left and right. The connection electrode 113a is provided on the right half of the infrared electrothermal coating 111, and the connection electrode 113b is provided on the left half of the infrared electrothermal coating 111. The left half and the right half of the infrared electrothermal coating 111 are connected in parallel between the conductive portions 112a2 and 112b2.

[0035] The connection electrode 113a is strip-shaped, and the length extending in its axial direction is the same as the length extending in the axial direction of the right half of the infrared electrothermal coating 111. The connection electrode 113a divides the right half of the infrared electrothermal coating 111 into two sub-infrared electrothermal coatings (A1 and A2 in FIG. 4) connected in series between the conductive part 112a2 and the conductive part 112b2. The sub-infrared electrothermal coating A1 and the sub-infrared electrothermal coating A2 are distributed in the circumferential direction of the substrate 110, and the equivalent resistance of the sub-infrared electrothermal coating A1 and the equivalent resistance of the sub-infrared electrothermal coating A2 may be the same or different. With the provided connection electrode 113a, the overall resistance value of the right half of the infrared electrothermal coating 111 can be reduced. For example, by providing one connection electrode 113a between the conductive part 112a2 and the conductive part 112b2, the overall resistance value of the right half of the infrared electrothermal coating 111 can be reduced by about 20%.

[0036] It should be noted that, if necessary, a plurality of connection electrodes 113a may be provided on the right half of the infrared electrothermal coating 111 to divide the right half of the infrared electrothermal coating 111 into a plurality of sub-infrared electrothermal coatings connected in series between the conductive part 112a2 and the conductive part 112b2. For example, with two connection electrodes 113a, it can be divided into three sub-infrared electrothermal coatings connected in series between the conductive part 112a2 and the conductive part 112b2. The equivalent resistances of the three sub-infrared electrothermal coatings may be the same or different, or two of their equivalent resistances may be the same.

[0037] The connection electrode 113b is the same. For the divided sub-infrared electrothermal coatings, reference can be made to A3 and A4 in FIG. 4.

[0038] After the heater 11 is energized, for example, the connecting portion 112a1 is electrically connected to the positive electrode of the power supply, and the connecting portion 112b1 is electrically connected to the negative electrode of the power supply (the reverse is also possible). The current flows in from the conductive portion 112a2 and sequentially passes through the sub-infrared electrothermal coating A1 and the sub-infrared electrothermal coating A2, or the sub-infrared electrothermal coating A3 and the sub-infrared electrothermal coating A4, and then flows out from the conductive portion 112b2. The connection electrodes 113a and 113b are not connected to an external power supply or circuit of the heater 11, that is, they are floating in the air, and the current cannot flow directly in from the connection electrode 113a and then flow out from the conductive portion 112b2 or the conductive portion 112a2.

[0039] It is preferable to adopt a continuous conductive coating for the conductive electrodes 112a, the conductive electrodes 112b, the connection electrodes 113a, and the connection electrodes 113b. The conductive coating may be a metal coating containing silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or the above metal alloy materials. The widths of the connection electrodes 113a and 113b are 0.5 mm to 3 mm, or 0.5 mm to 2.5 mm, and in specific examples, they may be 1 mm or 2 mm.

[0040] In other examples, the connection electrodes 113a and / or the connection electrodes 113b may adopt a discontinuous conductive coating such as a conductive coating having a mesh shown in FIG. 5.

[0041] It should be noted that in the manufacturing process of the heater 11, the connection electrodes 113a and / or the connection electrodes 113b may be provided between the substrate 110 and the infrared electrothermal coating 111 in a direction perpendicular to the surface of the substrate 110, or the infrared electrothermal coating 111 may be provided between the substrate 110 and the connection electrodes.

[0042] It should be noted that, different from the above example, in other examples, at least one of the conductive electrodes 112a, the conductive electrode 112b, the connection electrode 113a and the connection electrode 113b may be bonded to the infrared electrothermal coating 111. For example, at least one of the conductive electrodes 112a, the conductive electrode 112b, the connection electrode 113a and the connection electrode 113b may be coated on the inner wall of the sleeve. By connecting the sleeve to the substrate 110 in a sleeve connection manner, at least one of the conductive electrodes 112a, the conductive electrode 112b, the connection electrode 113a and the connection electrode 113b is closely bonded to the infrared electrothermal coating 111, and the arrangement of the conductive electrodes 112a, the conductive electrode 112b, the connection electrode 113a and the connection electrode 113b can refer to the above example.

[0043] FIG. 6 is a second heater provided in the embodiment of the present application.

[0044] Different from FIGS. 3-4, both the conductive electrode 112a and the conductive electrode 112b are annular and extend in the circumferential direction of the substrate 110. Between the conductive electrode 112a and the conductive electrode 112b, a plurality of connection electrodes 113a, which are also annular, are provided. The plurality of connection electrodes 113a divide the infrared electrothermal coating 111 into four sub-infrared electrothermal coatings (A1, A2, A3, A4 in the figure) connected in series between the conductive part 112a2 and the conductive part 112b2. The equivalent resistances of the four sub-infrared electrothermal coatings are different from each other. In this way, while reducing the overall resistance value of the infrared electrothermal coating 111, the uniformity of the temperature field of the substrate 110 can be improved.

[0045] In this example, the four sub-infrared electrothermal coatings are distributed in the axial direction of the substrate 110, and the length of the connection electrode 113a extending in the circumferential direction of the substrate 110 is the same as the length of the infrared electrothermal coating 111 extending in the circumferential direction of the substrate 110.

[0046] It should be noted that, in other examples, the connection electrode 113a may be arc-shaped.

[0047] After the heater 11 is energized, for example, the conductive electrode 112a is electrically connected to the positive electrode of the power supply, the conductive electrode 112b is electrically connected to the negative electrode of the power supply, and the current flows in from the conductive electrode 112a, and after sequentially passing through the sub-infrared electrothermal coating A1, the sub-infrared electrothermal coating A2, the sub-infrared electrothermal coating A3, and the sub-infrared electrothermal coating A4, it flows out from the conductive electrode 112b.

[0048] FIG. 7 is a third heater provided in the embodiment of the present application.

[0049] Different from FIG. 6, the conductive element includes a conductive electrode 112c provided separately from other conductive electrodes and connection electrodes. The conductive electrode 112a, the conductive electrode 112b, and the conductive electrode 112c divide the infrared electrothermal coating 111 into two independent heating regions above and below. By controlling the start of heating of the two independent heating regions, divided heating of the aerosol-forming substrate can be realized. For example, after starting the heating of the upper heating region and heating the corresponding upper half of the product, start the heating of the lower heating region to heat the corresponding lower half of the product, or after starting the heating of the upper heating region and heating the corresponding upper half of the product, start the heating of the entire heating region to heat the entire product.

[0050] The connection electrode 113a is provided between the conductive electrode 112a and the conductive electrode 112c, and the connection electrode 113a divides the upper heating region into two sub-infrared electrothermal coatings (A1 and A2 in the figure) connected in series between the conductive electrode 112a and the conductive electrode 112c.

[0051] The connection electrode 113b is provided between the conductive electrode 112c and the conductive electrode 112b, and the connection electrode 113b divides the lower heating region into two sub-infrared electrothermal coatings (A3 and A4 in the figure) connected in series between the conductive electrode 112c and the conductive electrode 112b.

[0052] When heating of the upper heating region is started, for example, the conductive electrode 112a is electrically connected to the positive electrode of the power source, the conductive electrode 112c is electrically connected to the negative electrode of the power source, and current flows in from the conductive electrode 112a, passes through the sub-infrared electrothermal coating A1 and the sub-infrared electrothermal coating A2 in sequence, and then flows out from the conductive electrode 112c.

[0053] When heating of the lower heating region is started, for example, the conductive electrode 112c is electrically connected to the positive electrode of the power source, the conductive electrode 112b is electrically connected to the negative electrode of the power source, and current flows in from the conductive electrode 112c, passes through the sub-infrared electrothermal coating A3 and the sub-infrared electrothermal coating A4 in sequence, and then flows out from the conductive electrode 112b.

[0054] FIG. 8 is a fourth heater provided in an embodiment of the present application.

[0055] Different from FIGS. 3 to 4, both the conductive electrode 112a and the conductive electrode 112b extend spirally in the axial direction of the substrate 110, and between the conductive electrode 112a and the conductive electrode 112b, one connection electrode 113a that also extends spirally in the axial direction of the substrate 110 is provided, and the height of its spiral extension is the same as the length of the infrared electrothermal coating 111 extending in the axial direction of the substrate 110. The connection electrode 113a divides the infrared electrothermal coating 111 into two sub-infrared electrothermal coatings (A1 and A2 in the figure) connected in series between the conductive electrode 112a and the conductive electrode 112b.

[0056] After the heater 11 is energized, for example, the conductive electrode 112a is electrically connected to the positive electrode of the power source, the conductive electrode 112b is electrically connected to the negative electrode of the power source, and current flows in from the conductive electrode 112a, passes through the sub-infrared electrothermal coating A1 and the sub-infrared electrothermal coating A2 in sequence, and then flows out from the conductive electrode 112b.

[0057] It should be noted that the matter shown in FIG. 7, which realizes the divided heating of the aerosol-forming substrate by increasing the conductive electrode 112c, is similarly applicable to the heaters in FIGS. 3 to 4 and FIG. 8. It can be understood that multi-stage heating can be realized by a plurality of conductive electrodes.

[0058] FIGS. 9 to 10 show a fifth heater provided in the embodiment of the present application.

[0059] Different from FIGS. 3 to 4, the infrared electrothermal coating 111 includes two spaced infrared electrothermal coatings as shown by the infrared electrothermal coating 111a and the infrared electrothermal coating 111b in the figure. Here, the infrared electrothermal coating 111a is closer to the mouth end of the aerosol generator 100 than the infrared electrothermal coating 111b. The separation distance between the infrared electrothermal coating 111a and the infrared electrothermal coating 111b is 0.2 mm to 1 mm.

[0060] The conductive electrode 112a includes a connecting portion 112a1 extending in the circumferential direction of the base 110 and a conductive portion 112a2 extending axially from the connecting portion 112a1 toward the upper end of the base 110. The connecting portion 112a1 is arc-shaped, is provided spaced apart from the infrared electrothermal coating 111b, and is provided between the infrared electrothermal coating 111b and the lower end of the base 110. A lead wire may be welded to the connecting portion 112a1 and electrically connected to an external power source of the heater 11 such as the battery cell 7 or the voltage after conversion of the battery cell 7, or may be electrically connected to the power source via another electrical connector. The conductive portion 112a2 is strip-shaped, and the length thereof extending in the axial direction is larger than the length of the infrared electrothermal coating 111b extending in the axial direction. The upper end of the conductive portion 112a2 is flush with the upper end of the infrared electrothermal coating 111b, and the conductive portion 112a2 maintains contact with the infrared electrothermal coating 111b to form an electrical connection.

[0061] The conductive electrode 112b is strip-shaped, and the length thereof extending in the axial direction is the same as the length of the infrared electrothermal coating 111a extending in the axial direction. The conductive electrode 112b maintains contact with the infrared electrothermal coating 111a to form an electrical connection.

[0062] The conductive electrode 112c has the same structure as the conductive electrode 112a. The connecting portion 112c1 of the conductive electrode 112c is provided between the infrared electrothermal coating 111b and the lower end of the base 110. The conductive portion 112c2 is strip-shaped, but the length extending in its axial direction is greater than the sum of the lengths extending in the axial direction of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b. The upper end of the conductive portion 112c2 is flush with the upper end of the infrared electrothermal coating 111a. The conductive portion 112c2 maintains contact with both the infrared electrothermal coating 111a and the infrared electrothermal coating 111b to form an electrical connection.

[0063] Both the connection electrode 113a and the connection electrode 113b are strip-shaped and are provided on the infrared electrothermal coating 111b. The length extending in the axial direction of the connection electrode 113a and the connection electrode 113b is the same as the length extending in the axial direction of the infrared electrothermal coating 111b.

[0064] The connection electrode 113a is provided between the conductive electrode 112a and the conductive electrode 112c. The connection electrode 113a divides the infrared electrothermal coating between the conductive electrode 112a and the conductive electrode 112c into two sub-infrared electrothermal coatings (B1 and B2 in FIG. 10) connected in series between the conductive electrode 112a and the conductive electrode 112c. The sub-infrared electrothermal coating B1 and the sub-infrared electrothermal coating B2 are distributed in the circumferential direction of the base 110. The equivalent resistance of the sub-infrared electrothermal coating B1 and the equivalent resistance of the sub-infrared electrothermal coating B2 may be the same or different.

[0065] The connection electrode 113b is also provided between the conductive electrode 112a and the conductive electrode 112c. The connection electrode 113b divides the infrared electrothermal coating between the conductive electrode 112a and the conductive electrode 112c into two sub-infrared electrothermal coatings (B3 and B4 in FIG. 10) connected in series between the conductive electrode 112a and the conductive electrode 112c. The sub-infrared electrothermal coating B3 and the sub-infrared electrothermal coating B4 are distributed in the circumferential direction of the substrate 110, and the equivalent resistance of the sub-infrared electrothermal coating B3 and the equivalent resistance of the sub-infrared electrothermal coating B4 may be the same or different.

[0066] With the provided connection electrode 113a and connection electrode 113b, the overall resistance value of the infrared electrothermal coating 111b can be reduced.

[0067] Similar to FIG. 7 or FIG. 8, by providing the conductive elements in FIG. 9, the infrared electrothermal coating 111a and the infrared electrothermal coating 111b can be controlled separately. Specifically, the power supply can be controlled to supply heating power to the infrared electrothermal coating 111a and / or the infrared electrothermal coating 111b. For example, after controlling the power supply to supply heating power to the infrared electrothermal coating 111a to heat the upper half of the aerosol generating product (the part corresponding to the area of the infrared electrothermal coating 111a), the power supply is controlled to supply heating power to the infrared electrothermal coating 111b to heat the lower half of the aerosol generating product (the part corresponding to the area of the infrared electrothermal coating 111b). The reverse is also possible.

[0068] Alternatively, after controlling the power supply to supply heating power to the infrared electrothermal coating 111a to heat the upper half of the aerosol generating product, the power supply is controlled to supply heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b simultaneously to heat the entire aerosol generating product.

[0069] Alternatively, control the power supply to supply heating power to the infrared electrothermal coating 111b to heat the lower half of the aerosol generating product, and then control the power supply to supply heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b simultaneously to heat the entire aerosol generating product.

[0070] When controlling the heating of the infrared electrothermal coating 111a, for example, the conductive electrode 112b is electrically connected to the positive electrode of the power supply, and the connecting portion 112c1 is electrically connected to the negative electrode of the power supply. In this way, the current flows in from the conductive electrode 112b, passes through the sub-infrared electrothermal coating A1 or the sub-infrared electrothermal coating A2 along the circumferential direction of the substrate 110, and then flows out from the conductive portion 112c2.

[0071] When controlling the heating of the infrared electrothermal coating 111b, for example, the connecting portion 112a1 is electrically connected to the positive electrode of the power supply, and the connecting portion 112c1 is electrically connected to the negative electrode of the power supply. The current flows in from the conductive portion 112a2, sequentially passes through the sub-infrared electrothermal coating B1 and the sub-infrared electrothermal coating B2, or the sub-infrared electrothermal coating B4 and the sub-infrared electrothermal coating B3, and then flows out from the conductive portion 112c2. The connection electrodes 113a and 113b are not connected to an external power supply or circuit of the heater 11, that is, they are floating in the air, and the current cannot flow directly in from the connection electrode 113a and then flow out from the conductive portion 112b2 or the conductive portion 112a2. Due to the presence of the connection electrodes 113a and 113b, the overall resistance value of the infrared electrothermal coating 111b can be reduced.

[0072] Figs. 11 to 12 are the sixth heater provided in the embodiments of the present application.

[0073] Unlike FIGS. 9 to 10, for the conductive portion 112a2 of the conductive electrode 112a, the length extending in the axial direction thereof is greater than the sum of the lengths extending in the axial direction of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b, and the upper end of the conductive portion 112a2 is flush with the upper end of the infrared electrothermal coating 111a. The conductive portion 112a2 maintains contact with both the infrared electrothermal coating 111a and the infrared electrothermal coating 111b to form an electrical connection. Both the conductive electrode 112b and the conductive electrode 112d are provided in the region of the infrared electrothermal coating 111a and maintain contact with the infrared electrothermal coating 111a to form an electrical connection. The conductive electrode 112b, the conductive portion 112a2, the conductive electrode 112d, and the conductive portion 112c2 are sequentially provided at intervals in the circumferential direction of the base body 110.

[0074] Unlike FIGS. 9 to 10, the infrared electrothermal coating 111a can be controlled separately, but the infrared electrothermal coating 111b cannot be controlled separately.

[0075] When controlling the heating of the heater 11, after controlling the power supply so that the infrared electrothermal coating 111a is supplied with heating power by the conductive electrode 112b and the conductive electrode 112d, the power supply is controlled so that the infrared electrothermal coating 111a and the infrared electrothermal coating 111b are simultaneously supplied with heating power by the conductive electrode 112a and the conductive electrode 112c.

[0076] When energizing the conductive electrode 112b and the conductive electrode 112d, the conductive portions (the conductive portion 112a2 of the conductive electrode 112a and the conductive portion 112c2 of the conductive electrode 112c) located between the conductive electrode 112b and the conductive electrode 112d are not energized. The conductive portions correspond to the connection electrodes in the examples of FIGS. 9 to 10, further reducing the overall resistance value of the infrared electrothermal coating 111a, rapidly raising the temperature of the infrared electrothermal coating 111a, thereby rapidly heating the upper half of the aerosol generating product and achieving the purpose of rapidly generating aerosol.

[0077] When energizing the conductive electrode 112a and the conductive electrode 112c, the conductive electrodes 112b and 112d located between the conductive electrode 112a and the conductive electrode 112c are not energized. The conductive electrodes 112b and 112d also correspond to the connection electrodes in the examples of FIGS. 9 to 10, and further reduce the overall resistance value of the infrared electrothermal coating 111a. In this case, since the infrared electrothermal coating 111a and the infrared electrothermal coating 111b are heated simultaneously, or the infrared electrothermal coating 111 is heated as a whole, due to the presence of the conductive electrodes 112b and 112d, the overall resistance value of the infrared electrothermal coating 111a is reduced, the temperature of the region of the infrared electrothermal coating 111a is increased, and the temperature field of the entire region of the infrared electrothermal coating 111 is changed.

[0078] It should be noted that although the preferred embodiments of the present application are shown in the specification and drawings of the present application, the present application can be realized in many different forms and is not limited to the embodiments described in this specification. These embodiments do not additionally limit the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure content of the present application more sufficient and comprehensive. In addition, the above technical features can be continuously combined to form various embodiments not listed above, and all of these embodiments shall fall within the scope described in the specification of the present application. Furthermore, those skilled in the art can make improvements and transformations based on the above description, and all of these improvements and transformations shall fall within the protection scope of the appended claims of the present application.

Claims

1. A substrate, an infrared electrothermal coating provided on the surface of the substrate and used to generate infrared rays for radiatively heating an aerosol-forming substrate after energization, and a conductive element including a first conductive electrode, a second conductive electrode, and at least one connection electrode provided on the surface of the substrate and spaced apart from each other, wherein the at least one connection electrode is used to divide the infrared electrothermal coating into at least two sub-infrared electrothermal coatings connected in series between the first conductive electrode and the second conductive electrode, wherein one of the first conductive electrode and the second conductive electrode is arranged to receive an inflow of an external current, and the inflowing current flows out from the other of the first conductive electrode and the second conductive electrode after sequentially passing through the at least two sub-infrared electrothermal coatings connected in series. A heater, characterized in that.

2. The equivalent resistance of any one of the sub-infrared electrothermal coatings is different from the equivalent resistance of the other sub-infrared electrothermal coatings, or the equivalent resistance of one of the sub-infrared electrothermal coatings is the same as the equivalent resistance of at least one of the other sub-infrared electrothermal coatings. The heater according to claim 1, characterized in that.

3. The heater according to claim 1, characterized in that the connection electrode is a continuous conductive coating formed on the surface of the substrate.

4. The heater according to claim 3, characterized in that the width of the connection electrode is 0.5 mm to 3 mm.

5. The heater according to claim 1, characterized in that the connection electrode is a discontinuous conductive coating formed on the surface of the substrate.

6. The heater according to claim 1, characterized in that in a direction perpendicular to the surface of the substrate, the connection electrode is provided between the substrate and the infrared electrothermal coating, or the infrared electrothermal coating is provided between the substrate and the connection electrode.

7. The substrate includes a first end and a second end located upstream of the first end and facing the first end, The heater according to claim 1, characterized in that the infrared electrothermal coating is provided at a distance from the first end.

8. The heater according to claim 7, characterized in that the separation distance between the infrared electrothermal coating and the first end is 0.2 mm to 1 mm.

9. The substrate is configured in a tubular shape. The at least two sub-infrared electrothermal coatings connected in series are distributed in the circumferential direction of the substrate, and the connection electrodes are configured as strip electrodes extending in the axial direction of the substrate, or the at least two sub-infrared electrothermal coatings connected in series are distributed in the axial direction of the substrate, and the connection electrodes are configured as annular electrodes or arc-shaped electrodes extending in the circumferential direction of the substrate, or both the sub-infrared electrothermal coating and the connection electrodes extend spirally in the axial direction of the substrate. The heater according to claim 1 is characterized in that.

10. The substrate is configured in a tubular shape. The length of the connection electrode extending in the axial direction of the substrate is the same as the length of the infrared electrothermal coating extending in the axial direction of the substrate, or the length of the connection electrode extending in the circumferential direction of the substrate is the same as the length of the infrared electrothermal coating extending in the circumferential direction of the substrate, or the height of the connection electrode extending spirally in the axial direction of the substrate is the same as the length of the infrared electrothermal coating extending in the axial direction of the substrate. The heater according to claim 1 is characterized in that.

11. The conductive element further includes a third conductive electrode provided on the surface of the substrate. The first conductive electrode, the second conductive electrode, and the third conductive electrode divide the infrared electrothermal coating into at least two independent heating regions. The at least one connection electrode is used to divide the at least two independent heating regions into at least two first sub-infrared electrothermal coatings connected in series between the first conductive electrode and the third conductive electrode. One of the first conductive electrode and the third conductive electrode is arranged to receive the inflow of an external current, and the inflowing current passes sequentially through the at least two first sub-infrared electrothermal coatings connected in series and then flows out from the other of the first conductive electrode and the third conductive electrode, and / or The at least one connection electrode is used to divide the at least two independent heating regions into at least two second sub-infrared electrothermal coatings connected in series between the second conductive electrode and the third conductive electrode. One of the second conductive electrode and the third conductive electrode is arranged to receive the inflow of an external current. The inflowing current sequentially passes through the at least two second sub-infrared electrothermal coatings connected in series and then flows out from the other of the second conductive electrode and the third conductive electrode. The heater according to claim 1 is characterized in that.

12. The infrared electrothermal coating includes a first infrared electrothermal coating and a second infrared electrothermal coating provided separately on the surface of the substrate. The at least one connection electrode includes a first connection electrode and a second connection electrode that maintain contact with the first infrared electrothermal coating to form an electrical connection. The first conductive electrode and the second conductive electrode maintain contact with the first infrared electrothermal coating to form an electrical connection, and also maintain contact with the second infrared electrothermal coating to form an electrical connection. The first connection electrode, the first conductive electrode, the second connection electrode, and the second conductive electrode are sequentially provided at intervals in the circumferential direction of the substrate. One of the first connection electrode and the second connection electrode is arranged to receive the inflow of an external current. The inflowing current flows out from the other of the first connection electrode and the second connection electrode. Alternatively, one of the first conductive electrode and the second conductive electrode is arranged to receive the inflow of an external current. The inflowing current flows out from the other of the first conductive electrode and the second conductive electrode. The heater according to claim 1 is characterized in that.

13. The substrate is tubular, and the inner diameter of the tubular substrate is 7 mm to 14 mm. The length of the infrared electrothermal coating extending in the axial direction of the substrate is 5 mm to 40 mm. The heater according to claim 1 is characterized in that.

14. An aerosol generating device, characterized by comprising a power supply for power supply and the heater according to any one of claims 1 to 13.

Images