WO2021139491A1

WO2021139491A1 - Aerosol generation device and heating assembly thereof

Info

Publication number: WO2021139491A1
Application number: PCT/CN2020/136246
Authority: WO
Inventors: 张幸福
Original assignee: 深圳麦时科技有限公司
Priority date: 2020-01-08
Filing date: 2020-12-14
Publication date: 2021-07-15
Also published as: EP4088590A4; JP7488342B2; CN111035070A; EP4088590A1; JP2023509085A; KR20220124738A

Abstract

Disclosed are an aerosol generation device (1) and a heating assembly (12) thereof. The heating assembly (12) comprises a longitudinal sheet-shaped insulating base (121) and a heating body (122) integrally sintered with the insulating base (121). Sintering the heating body (122) and the insulating base (121) into a whole can greatly improve the binding force between the heating body (122) and the insulating base (121), thereby effectively avoiding the virtual connection or floating of the heating body (122) due to plugging and unplugging the heating assembly (12) multiple times, and optimizing the atomization effect thereof.

Description

Aerosol generating device and heating component thereof

Technical field

The invention relates to the field of atomization, and more specifically, to an aerosol generating device and its heating component.

Background technique

Heat-not-burn e-cigarettes, also known as low-temperature baking smoking sets, are mainly used to precisely control the temperature to heat the atomized tobacco after the heating component is energized, which can quickly release the tobacco extracts in the tobacco under low temperature conditions, allowing consumers to smoke traditional cigarettes Feel the same time, but release fewer harmful ingredients. At present, different types of heating components have been introduced at home and abroad to heat aerosol-generating substrates such as tobacco.

At present, the heating method of heating components is usually tubular peripheral heating or central embedded heating. The former refers to the heating tube surrounding the cigarette, and the latter refers to the heating plate or heating rod inserted into the cigarette. Among them, the heating plate is widely used due to its simple manufacturing and convenient use. However, the conductive traces of the existing heaters are generally screen-printed or coated on the surface of insulating ceramics and other sheet-like substrates. During the process of multiple insertion and removal of the heating sheet, the conductive traces are likely to float on the heating sheet and form a virtual connection. , Affect the atomization effect.

technical problem

The technical problem to be solved by the present invention is to provide an improved heat-generating component and an aerosol generating device with the heat-generating component in view of the above-mentioned defects in the prior art.

Technical solutions

The technical solution adopted by the present invention to solve its technical problem is to construct a heating component for an aerosol generating device, which includes a longitudinally long sheet-shaped insulating substrate and a heating element sintered integrally with the substrate.

In some embodiments, the substrate is an insulating ceramic, and the substrate includes a through hole penetrating two opposite surfaces in a thickness direction;

The heating body is embedded in the through hole, and the heating body includes at least one conductive ceramic.

In some embodiments, the central axis of the heating body coincides with the central axis of the base body;

The heating element includes two heating arms arranged in parallel and spaced along the longitudinal direction and a connecting portion connecting the two heating arms in series at the top end.

In some embodiments, the base includes a tip at the top; the tip is V-shaped, and the angle between the two sharp edges of the tip is 60-120 degrees.

In some embodiments, the two opposite surfaces of the heating element in the thickness direction are respectively flush with the two opposite surfaces of the base in the thickness direction.

In some embodiments, the insulating ceramic is formed of thermally conductive ceramic powder, and the insulating ceramic includes at least one of alumina, zirconia, aluminum nitride, silicon carbide, and silicon nitride;

The at least one conductive ceramic includes a fast ion conductor material.

In some embodiments, the heating element includes at least two conductive ceramics connected in parallel or in series.

In some embodiments, the heating component further includes a protective layer covering the heating body, and the protective layer is a glaze layer formed by firing a glass glaze.

In some embodiments, the heat generating component further includes a mounting seat provided at the bottom of the base body.

In some embodiments, two opposite sides along the thickness direction of the bottom of the base body are formed with mounting parts, and the base body is convex and concavely engaged with the mounting seat through the mounting parts.

In some embodiments, the substrate has a thickness of 0.3-2.0 mm, a length of 18-31 mm, and a width of 2-8 mm.

In some embodiments, the heating element extends longitudinally to the bottom end surface of the base;

The heating component further includes two electrode leads electrically connected to the heating body, and the two electrode leads are buried inside the heating body.

In some embodiments, there is a distance between the bottom end surface of the heating element and the bottom end surface of the base;

The base body includes a root portion for connecting with the mounting seat, an insertion portion for inserting into the aerosol generating matrix, and a transition portion connecting the root portion and the insertion portion.

In some embodiments, the heating component further includes a conductive layer provided on a side surface of the bottom of the heating body, and the conductive layer is formed on the surface of the substrate by means of screen printing or plating.

In some embodiments, the heating component further includes two electrode leads respectively electrically connected to the conductive layer, and one ends of the two electrode leads are respectively welded to the conductive layer by overlapping.

In some embodiments, the heating component further includes two insulating connecting bodies embedded in the base body and sintered integrally with the base body;

The two insulating connecting bodies are made of insulating ceramics, and the two insulating connecting bodies are respectively arranged at two ends of the heating body.

In some embodiments, the heating component further includes two electrode leads respectively electrically connected to the heating body, and the two electrode leads are respectively buried inside the two insulating connecting bodies.

In some embodiments, the bottom end surface of the heating element is higher than the top end surface of the mounting seat and lower than the top end surface of the transition portion.

In some embodiments, the length of the root portion is 5-10 mm, and the length of the insertion portion is 10-18 mm.

The present invention also provides an aerosol generating device, which includes any one of the heating components described above.

Beneficial effect

The implementation of the present invention has at least the following beneficial effects: the heating element and the insulating base are sintered into one body, which can greatly improve the bonding force between the heating element and the insulating base, and effectively avoid the false connection or floating of the heating element caused by multiple insertion and removal of the heating component. , Optimize the atomization effect.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

FIG. 1 is a schematic diagram of a three-dimensional structure of an aerosol generating device in use in some embodiments of the present invention;

2 is a schematic cross-sectional structure diagram of the aerosol generating device shown in FIG. 1;

3 is a schematic cross-sectional structure diagram of the heating component in the first embodiment of the present invention;

Figure 4 is a bottom view of the heat generating component shown in Figure 3;

Figure 5a is a schematic plan view of a heat generating component in a second embodiment of the present invention;

Fig. 5b is a schematic plan view of the first alternative solution of the heating component shown in Fig. 5a;

Fig. 5c is a schematic plan view of a second alternative scheme of the heating component shown in Fig. 5a;

Fig. 6 is a schematic cross-sectional structure diagram of a heat generating component in a third embodiment of the present invention.

Embodiments of the present invention

In order to have a clearer understanding of the technical features, objectives and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Figures 1-2 show an aerosol generating device 1 in some embodiments of the present invention. The aerosol generating device 1 can be used to perform a process on a solid aerosol generating substrate 2 (for example, a cigarette) that is detachably inserted therein. Baking and heating to release the extract in the aerosol generating matrix 2 in a non-combustion state. As shown in the figure, the aerosol generating substrate 2 may be arranged in a cylindrical shape in some embodiments. The top of the aerosol generating device 1 is provided with a cavity 10 whose size is adapted to the aerosol generating substrate 2. The top of the cavity 10 is open, and the aerosol generating substrate 2 can be inserted into the cavity 10 from the opening at the top. A sliding cover 15 may be arranged beside the cavity 10 to cover the cavity 10 when not in use, and prevent foreign matter from entering the cavity 10.

In some embodiments, the aerosol generating device 1 may include a casing 11 and a heating component 12, a battery 13 and a main board 14 arranged in the casing 11. The main board 14 is electrically connected to the heating component 12 and the battery 13. The heating component 12 can extend into the cavity 10 from the bottom of the cavity 10 in the longitudinal direction and be inserted into the aerosol generating substrate 2 to be in close contact with the aerosol generating substrate 2. After the heating component 12 is powered by the battery 13, the aerosol generating substrate 2 inserted into the cavity 10 is baked and heated.

The heating component 12 may include a longitudinally long sheet-shaped insulating base 121, a heating element 122 bonded to the base 121, and two electrode leads 123 electrically connected to the heating element 122, respectively. The central axis of the heating element 122 coincides with the central axis of the base 121 to make the heating uniform. The two electrode leads 123 are respectively electrically connected to the positive and negative electrodes of the battery 13, and the heating element 122 is electrically connected to the positive and negative electrodes of the battery 13. The heating element 122 and the base 121 are sintered into one body, and the sintering temperature can be about 1000 degrees. The sintering molding method can greatly improve the bonding force between the heating element 122 and the base 121, effectively avoiding the false connection or floating of the heating element 122 caused by multiple insertion and removal of the heating component 12, and optimizing the atomization effect.

The base 121 may be an insulating ceramic in some embodiments. The insulating ceramic may be formed of thermally conductive ceramic powder, which may include aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO), aluminum nitride (AlN), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ). At least one of them.

The heating element 122 may be composed of one conductive ceramic, or two or more conductive ceramics connected in series or in parallel. Conductive ceramics can be fast ion conductor materials, and its crystal structure has four characteristics: ①The main body of the structure is composed of a type of ions occupying a specific position; ②It has a large number of vacancies far higher than the number of movable ions, which is in disordered subcrystalline There are always vacancies in the grid that can be occupied by migrating ions; ③The sublattice lattices have almost equal energy and relatively low activation energy; ④ There are always paths between the lattices, so as to follow a favorable path Can be panned. For some fast ion conductors, especially compounds that meet stoichiometry, there is an ordered structure of conducting ions at low temperatures; while at high temperatures, the sublattice structure becomes disordered like a liquid, and ion movement is very easy.

Common fast ion conductive ceramic materials include the following 3 categories:

(1) Silver and copper halogenated compounds and chalcogenide compounds, the bonding position of the metal atoms in the compound is relatively random, such as α-AgI, Ag ₂ S, Ag ₃ SI, CuS, CuCl;

(2) High-mobility monovalent cation oxides with β-Al ₂ O ₃ _{structure, such as Na 2} O·11Al ₂ O ₃ , Na ₃ Zr ₂ PO ₁₂ ;

(3) High-concentration defect oxides with calcium fluoride (CaF ₂ ) structure, such as CaO·ZrO ₂ , Y ₂ O ₃ ·ZrO ₂ .

The base 121 is provided with a through hole 1210 penetrating two opposite surfaces in the thickness direction, and the through hole 1210 may be substantially U-shaped in some embodiments. The heating element 122 is embedded in the through hole 1210. Correspondingly, the heating element 122 is roughly U-shaped. The thickness of the heating element 122 and the base 121 are the same, so that the two opposite surfaces of the heating element 122 in the thickness direction are respectively flush with the two opposite surfaces of the base 121 in the thickness direction.

In some embodiments, the heating component 12 may further include a mounting seat 124 for mounting and fixing the base 121. After the base 121 is molded, it can be molded with plastic to form the mounting seat 124. Mounting portions 1215 may be formed on two opposite sides of the bottom of the base body 121 along the thickness direction. The base body 121 is matched with the mounting base 124 through the mounting portions 1215 convex and concave to increase the bonding force with the mounting base 124 during secondary injection molding. The mounting portion 1215 may be a structure such as a hole, a groove, or a protrusion. In other embodiments, the mounting portion 1215 may also be formed only on one side of the base 121. The mounting base 124 may also have other structural forms. For example, the bottom of the base 121 along the thickness or width direction of the two opposite sides respectively extend outward to form the mounting base 124, or the mounting base 124 and the base 121 can also be separately manufactured and assembled. Together.

FIGS. 3-4 show the heating element 12 in the first embodiment of the present invention. In this embodiment, the heating element 122 can extend to the bottom end surface of the base 121 in the longitudinal direction. The two electrode leads 123 can be directly embedded in the heating element 122.

In some embodiments, the base 121 may include a root portion 1211 for fixing, an insertion portion 1213 for inserting into the aerosol generating substrate 2, and a transition portion 1212 connecting the root portion 1211 and the insertion portion 1213. In this embodiment, the widths of the root portion 1211, the transition portion 1212, and the insertion portion 1213 are the same, and the width W may be 2-8 mm, preferably 4-6 mm. The length L1 of the root portion 1211 can be 5-10 mm, the mounting portion 1214 is formed on the root portion 1211, and the mounting seat 124 can be disposed within the length range of the root portion 1211. The length L2 of the insertion portion 1213 may be 10-18 mm. The overall length L3 of the base 121 may be 18-31 mm. The thickness T of the base 121 may be 0.3-2.0 mm.

The insertion portion 1213 may include a tip 1214 at the top in some embodiments to facilitate insertion into the aerosol generating substrate 2. The tip 1214 is roughly V-shaped, and the angle α between the two front edges can be 60-120 degrees. In other embodiments, the tip 1214 may also be another shape with a guiding function whose width gradually increases toward the root, such as a circular arc shape, a trapezoid shape, or an arc shape.

The heating element 122 may include two longitudinal heating arms 1221 arranged in parallel and spaced along the longitudinal direction, and a connecting portion 1222 connecting the two heating arms 1221 in series at the top end. Two electrode leads 123 are respectively buried in the bottom of the two heating arms 1221. In this embodiment, the width of the heating arm 1221 in the longitudinal direction is uniform. In other embodiments, the width of the heating arm 1221 in the longitudinal direction may also be inconsistent. For example, the width of the heating arm 1221 may also be wide at the top and narrow at the bottom, or narrow at the top and wide at the bottom.

The connecting portion 1222 is substantially V-shaped, and its two front edges are respectively parallel to the two front edges of the prong 1214 of the base 121. The distances between the two front edges of the connecting portion 1222 and the two front edges of the tip 1214 are the same, which facilitates uniform heat generation.

The outer surface of the heating element 122 may also be covered with a protective layer, for example, a glaze layer formed by firing glass glaze, the thickness of which is generally less than 0.1 mm. The protective layer can reduce the corrosion effect of oxygen and impurities on the heating element 122, prevent the heating element 122 from reacting with the aerosol generating substrate 2 during heating, and can increase the smoothness and reduce the aerosol generating substrate 2 on the heating element 122 after heating. On the bond.

FIG. 5a shows the heating component 12 in the second embodiment of the present invention. In this embodiment, there is a certain distance between the bottom end surface of the heating body 122 and the bottom end surface of the base 121. A conductive layer 125 may be provided at the bottom of the heating element 122 for the connection of the two electrode leads 123. The conductive layer 125 can be formed on the surface of the base 121 by silk printing or plating, and is connected to the bottom two ends of the heating element 122 respectively. The conductive layer 125 can be made of materials with low resistivity and low heat generation, such as Ag, Au, Cu, and the like. One ends of the two electrode leads 123 can be respectively welded to the conductive layer 125 by overlapping. In this embodiment, the conductive layer 125 is provided on the same side of the heating element 122, and correspondingly, the two electrode leads 123 are provided on the same side of the heating element 122. In other embodiments, the conductive layer 125 may also be provided on both sides of the heating element 122. Correspondingly, the two electrode leads 123 are provided on both sides of the heating element 122, respectively.

The heating element 122 may include two longitudinal heating arms 1221 arranged in parallel and spaced along the longitudinal direction, and a connecting portion 1222 connecting the two heating arms 1221 in series at the top end. In this embodiment, each heating arm 1221 includes a first heating portion 1221a, a second heating portion 1221b, and a third heating portion 1221c connected in series from bottom to top. The widths of the first heating portion 1221a, the second heating portion 1221b, and the third heating portion 1221c increase in sequence, so that the resistances of the first heating portion 1221a, the second heating portion 1221b, and the third heating portion 1221c increase in sequence to The aerosol generating substrate 2 is heated and baked in a more balanced manner. Since the heating element 122 adopts a gradient resistance layout, the heating component 12 has a better energy utilization rate, a better temperature field, and has the advantages of a large amount of smoke during suction and a better suction taste. Understandably, the heating arm 1221 is not limited to the three-stage resistance decreasing structure, and two or more stages are also possible.

As in the first embodiment, the base 121 in this embodiment also includes a root portion 1211 for fixing, an insertion portion 1213 for inserting into the aerosol generating substrate 2, and a transition portion 1212 that connects the root portion 1211 and the insertion portion 1213. . The conductive layer 125 may be disposed on the root portion 1211 and the transition portion 1212. The top end surface of the conductive layer 125 (ie, the bottom end surface of the heating element 122) is higher than the top end surface of the root portion 1211, so that there is a gap between the top end surface of the mounting seat 124 and the bottom end surface of the heating element 122, which facilitates heat insulation. The bottom end surface of the heating element 122 can be lower than the top end surface of the transition portion 1212, so that the lower part of the aerosol generating substrate 2 is in full contact with the heating element 122, which is beneficial to complete baking. In other embodiments, the bottom end surface of the heating element 122 may also be flush with the top end surface of the transition portion 1212, as shown in FIG. 5b. In other embodiments, the bottom end surface of the heating element 122 may also be slightly higher than the bottom end surface of the transition portion 1212, as shown in FIG. 5c.

FIG. 6 shows the heating component 12 in the third embodiment of the present invention. In this embodiment, there is a certain distance between the bottom end surface of the heating element 122 and the bottom end surface of the base 121. The heating component 12 may also include two insulating connecting bodies 126 respectively embedded in the two ends of the through hole 1210 of the base 121 (that is, the two ends of the heating body 122), and the bottom end surfaces of the two connecting bodies 126 can respectively extend longitudinally To the bottom end surface of the base 121. The two connecting bodies 126 are sintered into one body with the heating body 122 and the base body 121, and the two electrode leads 123 are respectively embedded in the two connecting bodies 126. The connecting body 126 may be an insulating ceramic in some embodiments. The constituent material of the connecting body 126 and the constituent material of the base 121 may be the same or different.

As in the first embodiment, the base 121 in this embodiment also includes a root portion 1211 for fixing, an insertion portion 1213 for inserting into the aerosol generating substrate 2, and a transition portion 1212 that connects the root portion 1211 and the insertion portion 1213. . The top end surface of the connecting body 126 (that is, the bottom end surface of the heating element 122) is higher than the top end surface of the root portion 1211, so that there is a gap between the mounting seat 124 and the heating element 122, which is beneficial to heat insulation. The bottom end surface of the heating element 122 can be lower than the top end surface of the transition portion 1212, so that the lower part of the aerosol generating substrate 2 is in full contact with the heating element 122, which is beneficial to complete baking. In other embodiments, the bottom end surface of the heating element 122 may also be flush with the top end surface of the transition portion 1212, or slightly higher than the bottom end surface of the transition portion 1212.

It can be understood that the above technical features can be used in any combination without limitation.

The above examples only express the preferred embodiments of the present invention. The description is more specific and detailed, but it should not be construed as limiting the scope of the present invention; it should be noted that for those of ordinary skill in the art, Without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can be made. These all belong to the protection scope of the present invention; therefore, any equivalent changes made to the scope of the claims of the present invention Both and modifications shall fall within the scope of the claims of the present invention.

Claims

A heating component used in an aerosol generating device is characterized by comprising a longitudinally long sheet-shaped insulating base body (11) and a heating body (12) sintered integrally with the base body (11).
The heat-generating component according to claim 1, wherein the base (11) is an insulating ceramic, and the base (11) includes a through hole (1210) penetrating two opposite surfaces in a thickness direction;

The heating body (12) is embedded in the through hole (1210), and the heating body (12) includes at least one conductive ceramic.
The heating assembly according to claim 2, characterized in that the central axis of the heating body (12) coincides with the central axis of the base body (11);

The heating body (12) includes two heating arms (1221) arranged in parallel and spaced along the longitudinal direction and a connecting portion (1222) connecting the two heating arms (1221) in series at the top end.
The heat-generating component according to claim 2, wherein the base (11) includes a tip (1214) at the top; the tip (1214) is V-shaped, and two of the tip (1214) The angle between each front edge is 60-120 degrees.
The heat generating component according to claim 2, wherein the two opposite surfaces of the heating body (12) in the thickness direction are respectively flush with the two opposite surfaces of the base body (11) in the thickness direction.
The heat-generating component according to claim 2, wherein the insulating ceramic is formed of thermally conductive ceramic powder, and the insulating ceramic includes at least one of alumina, zirconia, aluminum nitride, silicon carbide, and silicon nitride ；

The at least one conductive ceramic includes a fast ion conductor material.
The heating component according to claim 2, wherein the heating body (12) comprises at least two conductive ceramics connected in parallel or in series.
The heating component according to claim 2, wherein the heating component further comprises a protective layer covering the outside of the heating element (12), and the protective layer is a glaze layer formed by firing a glass glaze.
The heat-generating component according to claim 2, wherein the heat-generating component further comprises a mounting seat (124) arranged at the bottom of the base body (11).
The heat-generating component according to claim 9, wherein the bottom of the base (11) is formed with mounting portions (1215) on two opposite sides in the thickness direction, and the base (11) passes through the mounting portions (1215). ) Protruding and concave matching with the mounting seat (124).
The heat-generating component according to claim 2, wherein the thickness of the base body (11) is 0.3-2.0 mm, the length is 18-31 mm, and the width is 2-8 mm.
The heat-generating component according to any one of claims 2-11, wherein the heat-generating body (12) extends longitudinally to the bottom end surface of the base body (11);

The heating component further includes two electrode leads (123) electrically connected to the heating body (12), and the two electrode leads (123) are embedded in the heating body (12).
The heating assembly according to any one of claims 2-11, wherein there is a distance between the bottom end surface of the heating body (12) and the bottom end surface of the base body (11);

The base body (11) includes a root portion (1211) for connecting with the mounting seat (124), an insertion portion (1213) for inserting the aerosol generating matrix (2), and connecting the root portion (1211) and the The transition part (1212) connected to the insertion part (1213).
The heating component according to claim 13, characterized in that the heating component further comprises a conductive layer (125) provided on one side surface of the bottom of the heating body (12), and the conductive layer (125) is printed by silk screen Or coating is formed on the surface of the substrate (11).
The heating component according to claim 14, characterized in that the heating component further comprises two electrode leads (123) electrically connected to the conductive layer (125), one end of the two electrode leads (123) They are respectively welded to the conductive layer (125) by means of lap joints.
The heat-generating component according to claim 13, wherein the heat-generating component further comprises two insulating connecting bodies (126) embedded in the base body (11) and sintered integrally with the base body (11);

The two insulating connecting bodies (126) are made of insulating ceramics, and the two insulating connecting bodies (126) are respectively arranged at two ends of the heating body (12).
The heating component according to claim 16, characterized in that the heating component further comprises two electrode leads (123) electrically connected to the heating body (12), and the two electrode leads (123) are respectively buried Inside the two insulating connecting bodies (126).
The heating component according to claim 13, wherein the bottom end surface of the heating element (12) is higher than the top end surface of the mounting seat (124) and lower than the top end surface of the transition portion (1212). .
The heat generating component according to claim 18, wherein the length of the root portion (1211) is 5-10 mm, and the length of the insertion portion (1213) is 10-18 mm.
An aerosol generating device, characterized by comprising the heat generating component according to any one of claims 1 to 19.