EP4218446A1

EP4218446A1 - Heater assembly and aerosol forming device

Info

Publication number: EP4218446A1
Application number: EP21870750.3A
Authority: EP
Inventors: Shouping Wang; Xingfu Zhang; Riming Fang; Lin Zhang; Lijia SUN; Yu Wang
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2020-09-23
Filing date: 2021-04-02
Publication date: 2023-08-02
Also published as: JP2023529880A; EP4218446A4; KR20230015463A; WO2022062361A1; JP7514959B2; CN114246372A

Abstract

The present application provides a heater assembly and an aerosol-forming device. The heater assembly includes a mounting base and a heating assembly. The heater assembly includes a heating body. The heating body has a first connection end and a second connection end opposite the first connection end. The heating body is fixed to the mounting base. At least a portion of the heating body is configured to be inserted into and heat the aerosol-forming substance. The heating body in the heater assembly can be directly and independently inserted into the aerosol-forming substance. When the temperature is excessively high, the heating body may not fall off from the substrate, failure of the heating assembly may not be caused, and the stability of the heating assembly may be improved significantly. In addition, the problem of the mounting base affecting the resistor heating circuit can be effectively avoided, a separate mounting base is not required, and production costs are reduced effectively.

Description

TECHNICAL FIELD

The present disclosure relates to the field of heating-not-burning smoke-forming devices, and in particular to a heater assembly and an aerosol-forming device.

BACKGROUND

As an alternative to cigarettes, e-cigarettes are safe, can be conveniently used, healthy, and environmentally friendly. Therefore, the e-cigarettes, such as heating-not-burning e-cigarettes, also known as heating-not-burning aerosol-forming devices, are increasingly popular.
A heating-not-burning aerosol-forming device in the art may heat substances in a tubular peripheral heating manner or in a central embedding heating manner. The tubular peripheral heating manner refers to a heating tube surrounding an outside of an aerosol-forming substance (such as tobacco) to heat the aerosol-forming substance. The central embedding heating manner refers to the heating tube being inserted into the aerosol-forming substance to heat the aerosol-forming substance. The heater assembly may be easily manufactured and may be used easily, and therefore, the heater assembly is widely used. A heating assembly in the art may be manufactured by configuring a ceramic or an insulated metal as a substrate, printing or coating a resistor heating circuit on the substrate, and performing a high temperature treatment to fix the resistor heating circuit on the substrate. Furthermore, the heating assembly and a mounting base may form a heater assembly, and the heater assembly may be fixed to the heating-not-burning aerosol-forming device by the mounting base.

SUMMARY OF THE DISCLOSURE

The resistor heating circuit on the heating assembly in the art is a thin film printed or coated on the substrate at a later stage. When the heating assembly is inserted into the aerosol-forming substance for a plurality of times, the substrate may be bent and deformed. Therefore, the resistor heating circuit may easily fall off from the substrate after being heated to a high temperature, and may not be stable. Further, in a heating process, the resistor heating circuit contacts only an aerosol-forming substance, which is disposed on a side of the substrate configured with the resistor heating circuit, but does not contact an aerosol-forming substance, which is disposed on a rear side of the substrate, such that the aerosol-forming substance may not be heated uniformly. In addition, since the resistor heating circuit is a thin film, the mounting base may affect the resistor heating circuit while the mounting base is assembled with the heating assembly, for example, the mounting base cause the resistor heating circuit to be deformed or broken.
The present disclosure provides a heater assembly and an aerosol-forming device. The heater assembly may be configured to solve the technical problem that the resistor heating circuit may easily fall off from the substrate after being heated to a high temperature and may not be stable, and solve the technical problem that the aerosol-forming substance may not be heated uniformly in the heating process. In addition, the heater assembly may be configured to solve the technical problem that the mounting base may affect the resistor heating circuit while the mounting base is assembled with the heating assembly.
The present disclosure provides an aspect to solve the above technical problem. A heater assembly is provided and includes: a mounting base; and a heating assembly. The heating assembly includes a heating body. The heating body has a first connection end and a second connection end opposite to the first connection end. The heating body is fixed to the mounting base, and at least a portion of the heating body is configured to be inserted into and heat an aerosol-forming substance.
The present disclosure provides another aspect to solve the above technical problem. An aerosol-forming device is provided and includes: a housing, a heater assembly arranged inside the housing, and a power supply assembly arranged inside the housing. The power supply assembly is connected to the heating body inside the heater assembly and is configured to supply power to the heating body. The heater assembly refers to the heater assembly according to the above aspect.
According to the heater assembly and the aerosol-forming device provided in the present disclosure, the heater assembly is configured with the heating assembly, and the heating assembly is configured as a structure including a heating body. At least a part of the heating body is capable of be inserted into and heating the aerosol-forming substance. Compared to the resistor heating circuit in the art that is silkscreen-printed on the substrate, the heating body of the present disclosure can be directly and independently inserted into the aerosol-forming substance, and may not fall off from the substrate when the heating body is heated to the high temperature, such that failure of the heating assembly may not be caused, reliability of the heating assembly may be improved significantly. In addition, by configuring the mounting base, the heating body is fixed to the mounting base, such that the heating assembly may be fixed to the aerosol-forming substance by the mounting base. Since the heating body itself can be inserted into the aerosol-forming substance independently, i.e., the heating body is a self-supporting structure, by fixing the mounting base to the heating body, the problem that the mounting base affects the resistor heating circuit may be effectively avoided. Further, a separate mounting substrate may not be required, production costs may be reduced effectively.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic view of a heater assembly according to an embodiment of the present disclosure.
FIG. 2 is a schematic view of a heater assembly inserted in to an aerosol-forming substance according to an embodiment of the present disclosure.
FIG. 3 is a structural schematic view of a mounting base according to an embodiment of the present disclosure.
FIG. 4 is a front view of a mounting base being assembled with a heating body according to an embodiment of the present disclosure.
FIG. 5 is a structural schematic view of a heating assembly according to a first embodiment of the present disclosure.
FIG. 6 is a structural schematic view of a heating assembly according to a second embodiment of the present disclosure.
FIG. 7 is a schematic view of a heating assembly inserted in to an aerosol-forming substance according to an embodiment of the present disclosure.
FIG. 8 is an exploded view of the structure shown in FIG. 6.
FIG. 9 is a structural schematic view of a heating assembly according to a third embodiment of the present disclosure.
FIG. 10 is a schematic view of a heating assembly inserted in to an aerosol-forming substance according to another embodiment of the present disclosure.
FIG. 11 is an exploded view of the structure shown in FIG. 9.
FIG. 12 is a plane view of a heating assembly according to an implementation of the present disclosure.
FIG. 13 is a plane view of a heating assembly according to another implementation of the present disclosure.
FIG. 14 is a plane view of a heating assembly according to still another implementation of the present disclosure.
FIG. 15 is a schematic view showing a size of a heater plate according to an implementation of the present disclosure.
FIG. 16 is a schematic view showing a size of a heater stick according to an implementation of the present disclosure.
FIG. 17 is a schematic view showing electrodes arranged on two opposite surfaces of a heating body according to an embodiment of the present disclosure.
FIG. 18 is a schematic view of a heater stick according to an embodiment of the present disclosure.
FIG. 19 is a schematic view of a heating assembly, viewed from an E direction, according to an embodiment of the present disclosure.
FIG. 20 is a side view of a heating assembly according to an embodiment of the present disclosure.
FIG. 21 is a schematic view showing a heating body snaped in a mounting base according to an embodiment of the present disclosure.
FIG. 22 is a schematic view showing locations of the heater stick where the first heat region and the second heat region are arranged, according to an embodiment of the present disclosure.
FIG. 23 is a schematic view of a fixing sleeve according to an embodiment of the present disclosure.
FIG. 24 is a schematic view of a fixing sleeve according to another embodiment of the present disclosure.
FIG. 25 is a schematic view of a heating assembly including a fixing sleeve according to an embodiment of the present disclosure.
FIG. 26 is a schematic view of the structure shown in FIG. 25 before being assembled.
FIG. 27 is a schematic view of a heating assembly including a fixing sleeve according to another embodiment of the present disclosure.
FIG. 28 is a schematic view of the structure shown in FIG. 27 before being assembled.
FIG. 29 is a schematic view of a fixing sleeve sleeving an outer surface of a first heat region of a heating body according to an embodiment of the present disclosure.
FIG. 30 is a schematic view of a mounting base being assembled with the heater plate according to an embodiment of the present disclosure.
FIG. 31 is a schematic view of a mounting base being assembled with the heater stick according to an embodiment of the present disclosure.
FIG. 32 is a schematic view of a mounting base being assembled with the heater stick according to another embodiment of the present disclosure.
FIG. 33 is a schematic view of a heating assembly according to a fourth embodiment of the present disclosure.
FIG. 34 is an exploded view of a product shown in FIG. 33 according to an embodiment of the present disclosure.
FIG. 35 is a schematic view of a heating assembly inserted in to an aerosol-forming substance according to an embodiment of the present disclosure.
FIG. 36 is a side view of a heating body according to an embodiment of the present disclosure.
FIG. 37 is a schematic view of a heating assembly according to a fifth embodiment of the present disclosure.
FIG. 38 is an exploded view of the heating assembly shown in FIG. 37.
FIG. 39 is a schematic view showing a size of the heating assembly shown in FIG. 37.
FIG. 40 is a schematic view of a mounting base being assembled with a heating assembly according to an embodiment of the present disclosure.
FIG. 41 is a schematic view of a mounting base being assembled with a heating assembly according to another embodiment of the present disclosure.
FIG. 42 is an exploded view of the product shown in FIG. 41.
FIG. 43 is a schematic view of a mounting base being assembled with a heating assembly according to still another embodiment of the present disclosure.
FIG. 44 is an exploded view of the heating assembly of the product shown in FIG. 43 according to an embodiment of the present disclosure.
FIG. 45 is an exploded view of the heating assembly of the product shown in FIG. 43 according to another embodiment of the present disclosure.
FIG. 46 is a cross sectional view of the heating bodies, which are arranged side-by-side, according to an embodiment of the present disclosure.
FIG. 47 is a cross sectional view of the heating bodies, which are arranged side-by-side, according to another embodiment of the present disclosure.
FIG. 48 is a schematic view of a heating assembly according to a sixth embodiment of the present disclosure.
FIG. 49 is an exploded view of the structure shown in FIG. 48, according to an embodiment of the present disclosure.
FIG. 50 is a schematic view of a heating assembly where a protective layer is coated on the entire surface of a heater stick, according to an embodiment of the present disclosure.
FIG. 51 is a schematic view of an aerosol-forming device according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

Technical solutions in the embodiments of the present disclosure will be clearly and completely described below by referring to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some of but not all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by any ordinary skilled person in the art without creative work shall fall within the scope of the present disclosure.
Terms "first", "second", and "third" in the present disclosure are used for descriptive purposes only, and shall not be interpreted as indicating or implying relative importance or implicitly specifying the number of an indicated technical feature. Therefore, a feature defined by the terms "first", "second", and "third" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality of" means at least two, such as two, three, and so on, unless otherwise expressly and specifically limited. All directional indications (such as up, down, left, right, forward, backward ......) in the present disclosure are used only to explain relative positions and movements of components in a particular attitude (the attitude shown in the corresponding drawing). When the particular attitude is changed, the directional indications may be changed accordingly. Terms "include", "have", and any variation thereof, are intended to cover non-exclusive inclusion. For example, a process, a method, a system, a product or an apparatus including a series of operations or units is not limited to the listed operations or units, but may further include operations or units that are not listed, or may include other may or units that are inherently included in the process, the method, the product or the apparatus.
The term "embodiments" may indicate that a particular feature, a structure or a property described in one embodiment may be included in at least one embodiment of the present disclosure. Presence of the term in various sections in the specification does not necessarily mean a same embodiment or a separate or an alternative embodiment that is mutually exclusive with other embodiments. It shall be understood, both explicitly and implicitly, by any ordinary skilled person in the art that the embodiments described herein may be combined with other embodiments.
The present disclosure will be described in detail below by referring to the accompanying drawings and embodiments.
As shown in FIG. 1 and FIG. 2, FIG. 1 is a structural schematic view of a heater assembly according to an embodiment of the present disclosure, and FIG. 2 is a schematic view of the heater assembly inserted in to an aerosol-forming substance according to an embodiment of the present disclosure. In the present embodiment, a heater assembly 10 is provided. The heater assembly 10 includes a mounting base 20 and a heating assembly 30. The heating assembly 30 may be configured to be inserted into and heat an aerosol-forming substance 102. In detail, the aerosol-forming substance 102 may be tobacco, and the following embodiments will be described by taking the tobacco as an example of the aerosol-forming substance 102. In other embodiments, the aerosol-forming substance 102 may be an aromatic plant, such as mint or an aromatic solid compound. Further, a schematic view of the heating assembly 30 inserted into the aerosol-forming substance 102 is shown in FIG. 2.
In detail, the heating assembly 30 includes a heating body, at least a portion of the heating body is configured to be inserted into and heat the aerosol-forming substance 102. Compared to a resistor heating circuit in the art, which is screen-printed on a substrate, the heating body of the present disclosure can be directly and independently inserted into the aerosol-forming substance 102, and may not be detached from the substrate when being heated to a high temperature. Failure of heating assembly may not occur, and reliability of the heating assembly 30 may be improved significantly. In detail, the heating body is fixed to the mounting base 20, such that the heating assembly 30 may be fixedly arranged inside a housing of the aerosol-forming device by the mounting base 20. The heating body itself can be independently inserted into the aerosol-forming substance 102, i.e., the heating body is a self-supporting structure. Therefore, compared to the resistor heating circuit in the art, which is a thin film, the heating body in the present disclosure is fixed to the mounting base 20, such that the technical problem of the mounting base 20 affecting the resistor heating circuit may be avoided effectively. Further, unlike the heating body in the art, a separated mounting substrate may not be required for mounting the mounting base 20, production costs may be reduced significantly.
FIG. 3 is a structural schematic view of the mounting base according to an embodiment of the present disclosure. The mounting base 20 may specifically include a mounting body 21 and a mounting hole 22 defined in the mounting body 21. The heating assembly 30 is inserted in the mounting hole 22 to be fixed to the mounting base 20.
In detail, the above-mentioned mounting hole 22 may be a through-hole that extends through the an upper surface and a lower surface of the mounting body 21. A size and a shape of the mounting hole 22 may match a size and a shape of a portion of the heating body that is within the heating assembly 30 and is inserted into the mounting hole 22. Specifically, as shown in FIG. 3, two reserved slots 221 may be defined in a side wall of the mounting hole 22. The two reserved slots 221 extend in an axial direction of the mounting hole 22. The two reserved slots 221 are arranged on an inner side wall of the mounting hole 22 and are opposite to each other, allowing electrode leads, which are connected to a power supply, to pass through and to be connected to the heating assembly 30.
In an embodiment, as shown in FIG. 1 and FIG. 3, a side surface of the mounting body 21 may define an extension slot 23 communicated with the mounting hole 22. The extension slot 23 may specifically extend in a radial direction of the mounting hole 22. A shape of the extension slot 23 may be the same as a shape of a portion of the heating assembly 30 inserted into the mounting base 20. For example, when the portion of the heating assembly 30 inserted into the mounting base 20 is rectangular, the extension slot 23 is also rectangular. In this way, the portion of the heating assembly 30 inserted into the mounting base 20 may be reinforced by the extension slot 23, and may be prevented from being broken. In an embodiment, the mounting base 20 may define two extension slots 23, and the two extension slots 23 may cross with and may be perpendicular to each other.
In an embodiment, as shown in FIG. 1, the mounting body 21 is further arranged with at least two fastening portions 241, and the mounting base 20 may be fixed to the housing of the aerosol-forming device by the fastening portions 241.
In an embodiment, as shown in FIG. 4, FIG. 4 is a front view of the mounting base being assembled with the heating body according to an embodiment of the present disclosure. A surface of the portion of the heating assembly 30 inserted into the mounting base 20 has a first fastening structure 25. A second fastening structure 26 is arranged inside the mounting hole 22 of the mounting base 20 at a position corresponding to the first fastening structure 25. The mounting base 20 may be fixed with the heating assembly 30 by fastening the first fastening structure 25 with the second fastening structure 26, such that stability of connection between the mounting base 20 and the heating assembly 30 is improved. The first fastening structure 25 may be a plurality of projections (or recesses), and the second fastening structure 26 may be a plurality of recesses (or projections) matched with the first fastening structure 25.
In detail, the mounting base 20 may be made of an organic or an inorganic material having a melting point of greater than 160°C, such as PEEK. The mounting base 20 may be adhered to the heating assembly 30 by an adhesive, and the adhesive may be a glue resistant to high temperatures. Alternatively, the heating assembly 30 may be placed in a mould, and a moulding process may be performed to form the mounting base 20 arranged at the outside of the heating assembly 30.
As shown in FIGs. 5 to 11, FIG. 5 is a structural schematic view of the heating assembly according to a first embodiment of the present disclosure; FIG. 6 is a structural schematic view of the heating assembly according to a second embodiment of the present disclosure; FIG. 7 is a schematic view of the heating assembly inserted in to the aerosol-forming substance according to an embodiment of the present disclosure; FIG. 8 is an exploded view of the structure shown in FIG. 6; FIG. 9 is a structural schematic view of the heating assembly according to a third embodiment of the present disclosure; FIG. 10 is a schematic view of the heating assembly inserted in to the aerosol-forming substance according to another embodiment of the present disclosure; and FIG. 11 is an exploded view of the structure shown in FIG. 9. In an embodiment, the heating assembly 30 specifically includes a heating body 11. The heating body 11 specifically includes a first extension portion 111 and a second extension portion 112 connected to the first extension portion 111. In specific embodiments, each of at least a portion of the first extension portion 111 and at least a portion of the second extension portion 112 is inserted into the aerosol-forming substance 102, and generates heat, when being conducted with power, to heat the aerosol-forming substance 102. It shall be understood that the first extension portion 111 and the second extension portion 112 may be independently and directly inserted into the aerosol-forming substance 102. However, the resistor heating circuit in the art, which is screen-printed or coated to the substrate, may be inserted into the aerosol-forming substance 102 via the substrate, and may not be independently inserted into the aerosol-forming device. Further, the first extension portion 111 and the second extension portion 112 of the present disclosure may not fall off from the substrate when being heated to high temperatures, and failure of the heating assembly may not be caused, such that stability of the heating assembly 30 may be improved significantly.
In detail, two opposite surfaces of the portion of the first extension portion 111 inserted into aerosol-forming substance 102 and two opposite surfaces of the portion of the second extension portion 112 inserted into aerosol-forming substance 102 contact the aerosol-forming substance 102. It is understood that, since the heating body 11 of the present disclosure is directly inserted into the aerosol-forming substance 102, the substrate or other base plates may not be required. Therefore, at least two opposite surfaces of the first extension portion 111 and at least two opposite surfaces of the second extension portion 112 of the heating body 11 directly contact the aerosol-forming substance 102, such that utilization of the generated heat may be improved significantly, and a heating efficiency is improved significantly.
In another embodiment, as shown in FIG. 6 and FIG. 9, the heating assembly 30 further includes a third extension portion 113 which may be entirely inserted into and heat the aerosol-forming substance 102. Specifically, in the present embodiment, the first extension portion 111 and the second extension portion 112 are arranged side by side and are spaced apart from each other. An end of the first extension portion 111 near the second extension portion 112 and an end of the second extension portion 112 near the first extension portion 111 are connected with each other by the third extension portion 113. The end of the first extension portion 111 near the second extension portion 112 and the end of the second extension portion 112 near the first extension portion 111 refer to ends (i.e., a second connection end of the heating body 11) that firstly contact and are inserted into the aerosol-forming substance 102. It is understood that the first extension portion 111, the second extension portion 112 and the third portion 113 cooperatively form a substantially U-shaped structure. In a specific embodiment, the first extension portion 111, the second extension portion 112 and the third extension portion 113 are conductive ceramics, and are sintered and configured as an integral one-piece structure. Specifically, a substrate plate for forming the heating body 11 may be cut by laser, and a cut-groove 114 is generated, such that the substrate having the first extension portion 111, the second extension portion 112 and the third extension portion 113 is obtained. It can be understood that the heating body 11 may also be configured by sintered directly.
In detail, shapes of the first extension portion 111, the second extension portion 112, and the third extension portion 113 are not limited herein and may be determined according to actual demands. In detail, the first extension portion 111 and the second extension portion 112 may be elongated, and a width of the third extension portion 113 decreases from an end near the first extension portion 111 to an end away from the first extension portion 111, such that a tip is formed, enabling the heating body 11 to be inserted into the aerosol-forming substance 102 easily. In the present embodiment, the first extension portion 111 and the second extension portion 112 are rectangular cubes, and the third extension portion 113 is substantially V-shaped. In other embodiments, the third extension portion 113 may be U-shaped or isosceles trapezoidal, or may be in another shape which has a width decreasing along the direction from the end near the first extension portion 111 and the second extension portion 112 to the end away from the first extension portion 111 and the second extension portion 112. In the present implementation, the cut-groove 114 is a rectangle having a uniform width, or a convex leading arc is formed at an end of the rectangle near the third extension portion 113. In detail, the cut-groove 114 is axial symmetric. A length direction of the cut-groove 114 is parallel to a direction of a central axis of the cut-groove 114. The first extension portion 111 and the second extension portion 112 are parallel to and spaced apart from each other, and are arranged side by side. Length directions of the first extension portion 111 and the second extension portion 112 are parallel to the direction of the central axis of the cut-groove 114. Each of a width direction of the first extension portion 111, a width direction of the second extension portion 112, and a width direction of the third extension portion 113 is perpendicular to the direction of the central axis of the cut-groove 114. The heating body 11 is symmetrical about the central axis of the cut-groove 114. That is, each of the first extension portion 111, the second extension portion 112, and the third extension portion 113 is symmetrical about the central axis of the cut-groove 114. In this way, corresponding positions of the first extension portion 111, the second extension portion 112, and the third extension portion 113, which are arranged on two opposite sides of the cut-groove 114, in the width direction may have a same temperature, such that the smoke may have a better taste for the user.
As shown in FIG. 12, FIG. 12 is a plane view of the heating assembly according to an implementation of the present disclosure. The first extension portion 111 and the second extension portion 112 are arranged side by side. However, the cut-groove 114 may be centrosymmetric, and the width of the cut-groove 114 may decrease in a direction from the end away from the third extension portion 113 to the end near the third extension portion 113. Correspondingly, an outer edge of the first extension portion 111 and an outer edge of the second extension portion 112 are parallel to each other. A width of the first extension portion 111/the second extension portion 112 may increase in the direction from the end away from the third extension portion 113 (i.e., the first connection end of the heating body 11) to the end near the third extension portion 113 (i.e., the second connection end of the heating body 11). In this way, a resistance at the end away from the third extension portion 113 may be increased slightly to be balanced with a resistance of the third extension portion 113 (which has a relatively large resistance), such that the entire heating assembly may generate heat uniformly.
In other implementations, as shown in FIG. 13, FIG. 13 is a plane view of the heating assembly according to another implementation of the present disclosure. The cut-groove 114 may be centrosymmetric. The width of the cut-groove 114 may increase in the direction from the end away from the third extension portion 113 to the end near the third extension portion 113. Correspondingly, the outer edge of the first extension portion 111 and the outer edge of the second extension portion 112 are parallel to each other. The width of the first extension portion 111/the second extension portion 112 may decrease in the direction from the end away from the third extension portion 113 to the end near the third extension portion 113. In this way, a resistance near an upper end of the heating body 11 may be higher, meeting the requirements that high temperatures are more concentrated at a middle-upper portion of the heating body 11.
In other implementations, as shown in FIG. 14, FIG. 14 is a plane view of the heating assembly according to still another implementation of the present disclosure. The first extension portion 111 and the second extension portion 112 are rectangular, but are not arranged side by side. The first extension portion 111 and the second extension portion 112 are not parallel to each other, and there is a certain angle between the first extension portion 111 and the second extension portion 112, such as 3 degrees to 10 degrees. In this case, the cut-groove 114 may be centrosymmetric, and the width of the cut-groove 114 may decrease in the direction from the end away from the third extension portion 113 to the end near the third extension portion 113.
In an embodiment, as shown in FIG. 15, FIG. 15 is a schematic view showing a size of a heater plate according to an embodiment of the present disclosure. The heating body 11 may be configured as a plate as shown in FIG. 15 and may be a heater plate made of conductive ceramic. In the present embodiment, a spacing between the first extension portion 111 and the second extension portion 112 is less than one tenth of the width of the entire heating body 11. The spacing L1 between the first extension portion 111 and second extension portion 112 may be in a range of 0.25 mm to 0.35 mm in order to ensure the strength of the heating body 11 while avoiding short circuits.
In detail, a resistivity of the ceramic used for making the heater plate may be 5^∗10^-5 ohms, a design power of the ceramic may be 2 watts, and a resistance of the ceramic may be 0.71 ohms. Specifically, the heater plate may be formed by single-strip being connected in series (a cut-groove 114 defined in the middle). That is, the first extension portion 111, the third extension portion 113, and second extension portion 112 are arranged in sequence and are connected in series with each other. The thickness H1 of the heater plate may be 0.5 mm, and the total length L2 of the heater plate may be 18 mm. Each of the length L3 of the first extension portion 111 and the length L3 of the second extension portion 112 may be 16 mm. It shall be understood that the effective length of the single strip of the heating body 11 may be 32.0 mm. The length of the third extension portion 113 of the heating body 11 may be 2 mm. Specifically, the width W1 of the heater plate may be 4.0 mm; specifically, an error of each dimension of the heater plate is not greater than 0.05 mm. Each of two opposite surfaces of the plate-shaped heating body 11 may be configured to contact and heat the aerosol-forming substance 102.
In another embodiment, as shown in FIG. 11 and FIG. 16, FIG. 16 is a schematic view showing a size of a heater stick according to an implementation of the present disclosure. The heating body 11 may alternatively be a stick and may be a heater stick made of conductive ceramic. In the present embodiment, the spacing L4 between the first extension portion 111 and the second extension portion 112 is less than one third of the diameter ϕ of the entire heater stick. The spacing L4 may specifically be in a range from 0.8 mm to 1 mm. Specifically, in the present embodiment, a support ceramic 14 is arranged between the first extension portion 111 and the second extension portion 112 to increase the strength of the heating body 11. In this way, while the heating body 11 is being inserted into the aerosol-forming substance 102, the heating body 11 may be inserted more smoothly into the aerosol-forming substance 102, and the probability of the heating body 11 being forced to be bent may be reduced. Specifically, the support ceramic 14 may be bonded to the first extension portion 111 and the second extension portion 112 by a glass ceramic 15, such that a bonding force there between may be improved. In the present embodiment, the support ceramic 14 may be made of ceramic materials such as zirconia, zirconia toughened, alumina material, and so on.
In detail, a resistivity of the ceramic materials for making the heater stick may be 3*10-5 ohms; a design power of the heater stick may be in a range of 3W to 4W, such as 3.3W specifically; and a resistance of the heater stick may be in a range of 0.3ohms to 1ohm, such as 0.5ohms. In detail, the heater stick may be formed by single-strip being connection in series. That is, the first extension portion 111, the third extension portion 113, and the second extension portion 112 are arranged in sequence and are connected in series. The diameter ϕ of the heater stick may be in a range of 2 mm to 5 mm, specifically 3 mm. The length L5 of the heater stick may be in a range of 18 mm to 22 mm, specifically 19.7 mm. Each of the length L6 of the first extension portion 111 and the length L6 of the second extension portion 112 may be in a range of 12 mm to 18 mm, specifically 16 mm. It shall be understood that the effective length of a single strip of the heating body 11 may be in a range of 30 mm to 35 mm, specifically 32.0 mm. The length of the third extension portion 113 may be in a range of 2 mm to 5 mm, specifically 3.7 mm. In detail, the length L7 of the support ceramic 14 disposed between the first extension portion 111 and the second extension portion 112 may be in a range of 12 mm to 18 mm, specifically 17 mm. The width W2 of the support ceramic 14 may be the same as the diameter ϕ of the heater stick and may be in a range of 2 mm to 5 mm, specifically 3 mm. The thickness H2 of the support ceramic 14 may be slightly less than the spacing between the first extension portion 111 and the second extension portion 112. Specifically, the thickness H2 may be in a range of 0.8 mm to 1.2 mm, such as 0.9 mm, allowing the glass ceramic 15 to be arranged easily.
In a specific embodiment, as shown in FIGs. 6 to 11, the heating assembly 30 further includes two electrodes 12, one of the two electrodes 12 is arranged on the first extension portion 111, and the other one of the two electrodes 12 is arranged on the second extension portion 112. While the device is in use, each of the two electrodes 12 is electrically connected to the power supply assembly through an electrode lead, allowing the heating body 11 to be electrically connected to the power supply assembly. In detail, as shown in FIG. 6 and FIG. 8, the two electrodes 12 are arranged on the end of the first extension portion 111 away from the third extension portion 113 and on the end of the second extension portion 112 away from the third extension portion 113, respectively; and sides of the ends where the two electrodes 12 are arranged face a same direction. The two electrodes 12 are formed by coating a conductive silver paste on an outer surface of a lower end of the conductive ceramic. In detail, each of the two electrodes 12 is substantially semi-cylindrical, and the two electrodes 12 extend from two ends of a cross section of the heating body 11 to inner wall surfaces corresponding to the cut-groove 114. In this way, a contact area of the conductive ceramic may be increased as much as possible to reduce a contact resistance. Further, by having a larger contact area, the electrode lead may be soldered easily. Compared to the resistor heating circuit in the art, which is in a small size and is formed by screen-printing or coating, for the heating assembly 30 of the present disclosure, a contact resistance between the electrodes and the heating circuit is high, the contact area between the heating body 11 of the present disclosure and the electrodes 12 may be increased significantly, such that the contact resistance may be reduced, and the heating body 11 may be sued more stably.
In a specific embodiment, as shown in FIG. 17 and FIG. 18, FIG. 17 is a schematic view showing electrodes arranged on two opposite surfaces of the heating body according to an embodiment of the present disclosure; and FIG. 18 is a schematic view of the heater stick according to an embodiment of the present disclosure. When the heating body 11 is configured as the heater plate, each of two opposite surfaces of the first extension portion 111 and each of two opposite surfaces of the second extension portion 112 is arranged with one electrode 12. That is, one of the two electrodes 12 is arranged on each of a first surface C at the end of the first extension portion 111 and a second surface D opposite to the first surface C of the first extension portion 111, and the other one of the two electrodes 12 is arranged on each of a first surface C at the end of the second extension portion 112 and a second surface D opposite to the first surface C of the second extension portion 112. When two electrode leads are connected, one of the two electrode leads is a Y-shaped electrode lead and may be connected to the one of the two electrodes 12 arranged on the two surfaces of the first extension portion 111, and the other one of the two electrode leads is a Y-shaped electrode lead and may be connected to the other one of the two electrodes 12 arranged on the two surfaces of the second extension portion 112. When the heating body 11 is the heater stick, as shown in FIG. 18, each of the two electrodes 12 may extend to the inner wall surface corresponding to the cut-groove 114. In detail, the first extension portion 111 of the heater stick has a first inner surface 111a and a first outer surface 111b. The second extension portion 112 has a second inner surface 112a and a second outer surface 112b. The electrode 12 arranged on the first extension portion 111 extends from the first outer surface 111a to the first inner surface 111b. The electrode 12 arranged on the second extension portion 112 extends from the second outer surface 112a to the second inner surface 112b. By arranging the electrodes 12 on two surfaces of the heating body 11, soldering may be performed easily, the heating body 11 may have a lower resistance and may generate relatively less heat when being conducted, such that the heating body 11 may be prevented from being damaged effectively. In addition, the two surfaces of the conductive ceramic may be conducted at the same time, a same electrical potential may be generated, conductive components of the two surfaces may generate a uniform electric field, and a better heating effect may be achieved.
In the present implementation, the cut-groove 114 extends through first surface C and second surface D. Further, as shown in FIG. 19, FIG. 19 is a schematic view of the heating assembly, viewed from an E direction, according to an embodiment of the present disclosure. Specifically, in the thickness direction of the heating body 11, each of an edge of the first extension portion 111, an edge of the second extension portion 112, and an edge of the third extension portion 113 extends from a surface parallel to the middle of the first surface C and the second surface D towards the first surface C and the second surface D to form a guiding surface 118. The guiding surface 118 may specifically be a guiding inclined surface (see FIG. 19) or an arc. In this way, the heating body 11 may be inserted into the aerosol-forming substance 102 easily, a resistance while inserting may be reduced, and the heating body 11 may be protected better.
In a specific embodiment, the electrodes 12 may be formed on two ends of the first extension portion 111 and on two ends of the second extension portion 112 by coating, in order to improve bonding strength between the electrodes 12 and the heating body 11, such that stability of the connection between the electrode leads connected to the electrodes 12 and the heating body 11 may be improved. It is understood that the ceramic has a microporous structure. The microporous structure of the ceramic enables the bonding between the formed electrodes 12 and the heating body 11 to be strong when the thickness of the coating is large. In this way, the bonding between the electrodes 12 and the heating body 11 is improved significantly. Specifically, the above-mentioned coating material may be the silver paste. It can be understood that the electrodes 12 may be formed by depositing a metal film, such as depositing a metal material having a resistivity greater than 1^∗10^-6 ohms, such as gold, platinum, copper, and so on.
In a specific embodiment, as shown in FIG. 20, FIG. 20 is a side view of the heating assembly according to an embodiment of the present disclosure. A surface of the heating body 11 may be coated with a protective layer 115. The protective layer 15 covers the two electrodes 12, preventing an oil, which is generated while the aerosol-forming substance 102 is being heated, from damaging or contaminating the two electrodes 12 and the heating body 11. Specifically, the protective layer 115 may be a vitreous glaze layer.
In detail, as shown in FIG. 21 and FIG. 22, FIG. 21 is a schematic view showing the heating body fastened in the mounting base according to an embodiment of the present disclosure; and FIG. 22 is a schematic view showing locations of the heater stick where the first heat region and the second heat region are arranged, according to an embodiment of the present disclosure. The heating body 11 includes a first heat region A and a second heat region B connected to the first heat region A. The first heat region A is a main atomization region and is inserted into the aerosol-forming substance 102 to heat the aerosol-forming substance 102. An atomization temperature on the first heat region A is concentrated within a range of 280°C to 350°C, and the concentrated area occupies more than 75% of an area of the atomization region. The second heat region B is a main mating section of the heating body 11 and has a temperature below 150°C. That is, the temperature of the first heat region A is higher than the temperature of the second heat region B. Further, a portion of the heating body 11 located in the second heat region B is fixed to the mounting base 20 to prevent the mounting base 20 from being damaged when the temperature of the second heat region B is excessively high (for example, the PEEK is plastic and may be melt), or to prevent the mounting base 20 (such as a ceramic mounting base) from transmitting the high temperature to other components of the aerosol-forming device when the temperature of the second heat region B is excessively high, such that the housing may not be excessively hot, or an internal circuit board may not be damaged, and the temperature may not be transferred to reduce the utilization of the heat generated by the first heat region A. In a specific embodiment, the portion of the heating body 11 disposed at the second heat region B is inserted into the mounting hole 22 of the mounting base 20 to be secured to the mounting base 20. Specifically, the entire position corresponding to the portion of the heating body 11 disposed at the second heat region B is inserted into the mounting hole 22 of the mounting base 20. In this case, it is understood that the axial length of the position of the heating body 11 disposed at the second heat region B is less than or equal to the axial length of the mounting hole 22. Alternatively, the portion of the heating body 11 disposed at the second heat region B is inserted into the mounting hole 22 of the mounting base 20. In this case, the axial length of the position of the heating body 11 disposed at the second heat region B is greater than the axial length of the mounting hole 22 or less than the axial length of the mounting hole 22. The heating assembly 30 being inserted into the mounting hole 22 in the following embodiments may be similar to the present situation.
In detail, the length of the first heat region A of the heater stick may be 14.5 mm, and the length of the second heat region B of the heater stick may be 5.2 mm.
In a specific embodiment, for the first heat region A and the second heat region B of each of the first extension portion 111 and the second extension portion 112, only the majority of the first heat region A is inserted into the aerosol-forming substance 102, and a small portion of the first heat region A and the entire second heat region B are disposed out of the aerosol-forming substance102. Alternatively, for the first heat region A and the second heat region B of each of the first extension portion 111 and the second extension portion 112, the entire first heat region A is inserted into the aerosol-forming substance102, and the second heat region B is disposed out of aerosol-forming substance 102. Alternatively, for the first heat region A and the second heat region B of each of the first extension portion 111 and the second extension portion 112, the entire first heat region A and a small portion of the second heat region B are inserted into the aerosol-forming substance 102, and only the majority of the second heat region B is disposed out of the aerosol-forming substance 102.
In a specific embodiment, the two electrodes 12 are specifically disposed at the second heat region B of the heating body 11 to reduce the atomization temperature of the ceramic heating body 11 disposed at the second heat region B. In the present embodiment, a ratio of the heating temperature of the first heat region A to the heating temperature of the second heat region B of the heating body 11 is greater than 2.
In a specific embodiment, a resistivity of the material of the portion of the heating body 11 disposed at the second heat region B is less than a resistivity of the material of the portion of the heating body 11 disposed at the first heat region A, such that the temperature of the first heat region A is greater than the temperature of the second heat region B of the heating body 11. At the same time, since different heat regions are configured with materials of different resistivities, temperatures of the different heat regions may be regulated based on a difference in the resistivities. Specifically, a major component of the ceramic material of the portion of the heating body 11 disposed at the first heat region A may be the same as a major component of the ceramic material of the portion of the heating body 11 disposed at the second heat region B, and the first heat region A and the second heat region B may be configured as an integral one-piece structure. However, a proportion or other components of the ceramic materials of the portion of the heating body 11 disposed at the first heat region A may be different from a proportion or other components of the ceramic materials of the portion of the heating body 11 disposed at the second heat region B. In this way, the resistivity of the portion of the heating body 11 disposed at the first heat region A is different from the resistivity of the portion of the heating body 11 disposed at the second heat region B. In the art, the two heat regions are formed by splicing metal films formed by different conductive materials, for example, an aluminum film and a gold film, which are two different conductive materials, are spliced. In the present disclosure, a splicing manner is not performed, such that a conductive body made of the first heat region A and the second heat region B may be not be broken.
In another embodiment, as shown in FIG. 21, the width or/and the thickness of the portion of the first extension portion 111 of the heating body 11 disposed at the second heat region B is greater than the width or/and the thickness of the portion of the first extension portion 111 of the heating body 11 disposed at the first heat region A, and the width or/and the thickness of the portion of the second extension portion 112 of the heating body 11 disposed at the second heat region B is greater than the width or/and the thickness of the portion of the second extension portion 112 of the heating body 11 disposed at the first heat region A, such that the temperature of the first heat region A is greater than the temperature of the second heat region B of the heating body 11. In the present embodiment, while the heating body 11 is being inserted into or taken out of the aerosol-forming substance 102, the mounting base 20 may be prevented from being displaced relative to the heating body 11 to affect stability of the connection between the electrode leads and the electrodes 12. A widened portion of the second heat region B of the heating body 11 may be fastened within the mounting base 20, such that a position the mounting base 20 may be limited by the widened portion of the heating body 11. It shall be understood that, in the present embodiment, the portion of the heating body 11 corresponding to the first heat region A is also inserted into the mounting base 20.
Of course, in other embodiments, the material may be controlled to allow the temperature of the first heat region A to be greater than the temperature of the second heat region B of the heating body 11. For example, a conductive component may be added to a lower part of the heating body 11, such that the lower part has a lower resistance and reaches a lower temperature when being heated. Therefore, in the present embodiment, the width and/or the thickness of the first extension portion 111 disposed at the second heat region B is equal to the width and/or the thickness of the first extension portion 111 disposed at the first heat region A, and the width and/or the thickness of the second extension portion 112 disposed at the second heat region B is equal to the width and/or the thickness of the second extension portion 112 disposed at the first heat region A, such that the heating body 11 may be processed easily, and the problem that the widened portion is adhered with tobacco or tobacco oil may be avoided.
While the device is in use, the heating assembly 30 is inserted into the aerosol-forming substance 102, and after the power is supplied, the heating assembly 30 starts operating, the aerosol-forming substance 102 is heated, and smokes are generated.
According to the present embodiment, the heating assembly 30 includes the heating body 11. The heating body 11 includes the first extension portion 111 and the second extension portion 112 spaced apart from the first extension portion 111. At least a portion of the first extension portion 111 and at least a portion of the second extension portion 112 are configured to be inserted into the aerosol-forming substance 102 and to generate heat, when being conducted, to heat the aerosol-forming substance 102. Compared to the resistor heating circuit in the art, which is screen-printed or coated on the substrate, the heating body 11 of the present disclosure may be directly and independently inserted into the aerosol-forming substance 102, and when the heating assembly is heated to a high temperature, the heating body 11 may not fall of from the substrate, and failure of the heating assembly may not be caused, the stability of the heating assembly 30 may be improved. At the same time, since the heating body 11 is a self-supporting structure, the heating body 11 may not be engaged with the substrate, two opposite surfaces of the heating body 11 may directly contact the aerosol-forming substance 102, such that the heating assembly 30 may heat the aerosol-forming substance 102 more uniformly.
In the present embodiment, as shown in FIGs. 23 to 28, FIG. 23 is a schematic view of a fixing sleeve according to an embodiment of the present disclosure; FIG. 24 is a schematic view of the fixing sleeve according to another embodiment of the present disclosure; FIG. 25 is a schematic view of the heating assembly including the fixing sleeve according to an embodiment of the present disclosure; FIG. 26 is a schematic view of the structure shown in FIG. 25 before being assembled; FIG. 27 is a schematic view of the heating assembly including the fixing sleeve according to another embodiment of the present disclosure; and FIG. 28 is a schematic view of the structure shown in FIG. 27 before being assembled.
That is, the heating assembly 30 further includes the fixing sleeve 13. The fixing sleeve 13 sleeves the outside of the heating body 11 to increase a resistance of the heating body 11 against fatigue, thereby increasing the service life of the heating assembly 30. Specifically, the fixing jacket 13 may be made of metal, such as steel. A thickness of a wall the fixing sleeve 13 may be in a range of 0.1 mm to 0.5 mm.
In an embodiment, a longitudinal length of the fixing sleeve 13 is the same as a longitudinal length of the heating body 11. That is, the fixing sleeve 13 sleeves the entire outer surface of the heating body 11. In this case, the mounting base 20 is fixed to the fixing sleeve 13 and corresponds to the second heat region B of the heating body 11. Specifically, when the heating body 11 is the heater plate, a specific structure of the fixing sleeve 13 may be seen in FIG. 23. A structure of a product formed by the fixing sleeve 13 sleeving the plate-shaped heating body 11 can be seen in FIG. 25. An exploded view of the product can be seen in FIG. 26. Specifically, the fixing sleeve 13 is also plate-shaped. An end of the fixing sleeve 13 defines an opening, and the other end of the fixing sleeve 13 is closed. The closed end of the fixing sleeve 13 forms the tip, and each of two opposite side walls of the opening end of the fixing sleeve 13 has a notch 131. The two electrodes 12 are arranged on side surfaces of the first extension portion 111 and the second extension portion 112 respectively away from the cut-groove 114 and are exposed through two notches 131 to be connected to the electrode leads 23.
When the heating body 11 is the heater stick, a specific structure of the fixing sleeve 13 can be seen in FIG. 24. A structure of the product formed by the fixing sleeve 13 sleeving the stick-shaped heating body 11 can be seen in FIG. 27, and an exploded view of the product can be seen in FIG. 28. Specifically, the fixing sleeve 13 is stick-shaped. An end of the fixing sleeve 13 defines an opening, and the other end of the fixing sleeve 13 is closed. The closed end of the fixing sleeve 13 forms the tip, and each of two opposite side walls of the opening end of the fixing sleeve 13 has a notch 131. The two electrodes 12 are arranged on side surfaces of the first extension portion 111 and the second extension portion 112 respectively away from the cut-groove 114 and are exposed through two notches 131 to be connected to the electrode leads 23.
Specifically, as shown in FIG. 28, an insulating medium layer 24 is disposed between the heating body 11 and the fixing sleeve 13 to strengthen bonding between the fixing sleeve 13 and the heating body 11 and to prevent short circuits. Specifically, the insulating medium layer 24 may be coated on the outer surface of the heating body 11 or the inner surface of the fixing sleeve 13, based on a coating processing. The thickness of the coating can be in a range from 0.05 mm to 0.1 mm. In a specific embodiment, the insulating medium layer 24 is coated on the surface of the heating body 11 and exposes the cut-groove 114 and the electrodes 12.
Specifically, the length of the fixing sleeve 13 is the same as or less than the length of the heating body 11. It shall be understood that since the fixing sleeve 13 has the tip, the third extension portion 113 may not have a tip, such that the heating body 11 may be machined easily.
In another embedment, as shown in FIG. 29, FIG. 29 is a schematic view of the fixing sleeve sleeving the outer surface of the first heat region of the heating body according to an embodiment of the present disclosure. The longitudinal length of the fixing sleeve 13 is less than the longitudinal length of the heating body 11. Specifically, in an embodiment, the fixing sleeve 13 sleeves only the entire or a part of the outer surface of the portion of the heating body 11 corresponding to the first heat region A (see FIG. 29). In another embodiment, the fixing sleeve 13 sleeves the entire outer surface of the portion of the heating body 11 corresponding to the first heat region A and a part of the outer surface of corresponding to the second heat region B. In this case, the mounting base 20 is fixed to the portion of the heating body 11 exposed out of the fixing sleeve 13, and the mounting base20 abuts against an end of the fixing sleeve 13 near the mounting base 20. In this way, two surfaces of the heating body 11 may be fixed directly to the mounting base 20. Further, the portion of the first extension portion 111 and the portion of the second extension portion 112 inserted into the aerosol-forming substance 102 are reinforced and may not be deformed or broken.
As shown in FIGs. 30 to 32, FIG. 30 is a schematic view of the mounting base being assembled with the heater plate according to an embodiment of the present disclosure; FIG. 31 is a schematic view of the mounting base being assembled with the heater stick according to an embodiment of the present disclosure; and FIG. 32 is a schematic view of the mounting base being assembled with the heater stick according to another embodiment of the present disclosure. In the present embodiment, when the heating body 11 is the heater plate, a structure of a product formed by the mounting base 20 being assembled with the heating body 11 can be seen in FIG. 30. When the heating body 11 is the heater stick, and when the fixing sleeve 13 does not sleeve the outside of the heating body 11, a structure of a product formed by the mounting base 20 being assembled with the heating body 11 can be seen in FIG. 31. When the fixing sleeve 13 is arranged at the outside of the heating body 11, the mounting base 20 may be arranged on the heating body 11 or on the fixing sleeve 13, according to actual situations. For example, when the length of the fixing sleeve 13 is the same as the length of the heating body 11, the mounting base 20 may sleeve the fixing sleeve 13, as shown in FIG. 32. When the length of the fixing sleeve 13 is less than the length of the heating body 11, the end of the heating body 11 coated with the electrodes 12 is exposed out of the fixing sleeve 13. The mounting base 20 is fixed to the end of the heating body 11 exposed out of the fixing sleeve 13, i.e., fixed to the second heat region B of the heating body 11. Further, the mounting base 20 abuts against the end of the fixing sleeve 13 near the mounting base 20. Preferably, when the end of the heating body 11 coated with electrodes 12 is exposed out of the fixing sleeve 13, the mounting base 20 is fixed to the opening end of the fixing sleeve 13, and that is, the mounting base20 is inserted into the opening end of the fixing sleeve 13, and the end of the body 11 coated with the electrodes 12 passes through the mounting base 20.
As shown in FIGs. 33 to 35, FIG. 33 is a schematic view of the heating assembly according to a fourth embodiment of the present disclosure; FIG. 34 is an exploded view of a product shown in FIG. 33 according to an embodiment of the present disclosure; and FIG. 35 is a schematic view of the heating assembly inserted in to the aerosol-forming substance according to an embodiment of the present disclosure. In the present embodiment, the heating assembly 30 is provided and includes a substrate 31 and a heating body 32 embedded within the substrate 31. Specifically, in the present embodiment, a structure of the heating assembly 30 being inserted into the aerosol-forming substance 102 can be seen in FIG. 35.
The substrate 31 may be a rectangular substrate 31 having a first end M and a second end N opposite to the first end M. While the heating assembly 30 is being inserted into the aerosol-forming substance 102, the second end N of the substrate 31 is inserted into the aerosol-forming substance 102 firstly. Therefore, in order to allow the heating assembly 30 to be easily inserted into the aerosol-forming substance 102, the second end N of the substrate 31 may be configured as a tip, i.e., in a triangular structure, and an angle between two adjacent sides of the tip may be in a range of 45 degrees to 90 degrees, such as 60 degrees.
In detail, the substrate 31 may be made of an insulating ceramic. A thermal conductivity of the substrate 31 made of the insulating ceramic may be in a range from 4 W/(m.k) to 18 W/(m.k). A strength against bending of the substrate 31 may be above 600 MPa. A thermal stability of the substrate 31 may exceed 450 degrees. A fire-resistance of the substrate 31 may be higher than 1450 degrees. Of course, in other embodiments, the substrate 31 may be a metal substrate arranged with an insulating coating. In this way, while the strength of the heating assembly 30 is improved, the heating assembly 30 may be prevented from being bent or fractured, the heat generated by the heating body 32 may diffuse to tobacco that contacts the substrate 31, such that tobacco in the aerosol-forming substance 102 may be heated more evenly. The substrate 31 may alternatively be made of a new composite zirconia material. The new composite zirconia substrate 31 may maintain and transfer the heat generated by the heating body 32, such that energy utilization of the heating assembly 30 may be improved. The ceramic substrate 31 may alternatively be made of a ZTA material (zirconia toughened alumina ceramic) or MTA (mullite and alumina composite).
In a specific embodiment, the substrate 31 defines a receiving slot 311 along the length direction of the substrate 31. At least a part of the heating body 32 is received in the receiving slot 311. In this way, while the heating assembly 30 is being inserted into the aerosol-forming substance 102, the heating body 32 may not receive a force directly but may receive the force through the substrate 31, such that the heating body 32 may not be bent.
In detail, the substrate 31 has a first surface C1 and a second surface D1 opposite to the first surface C 1. The receiving slot 311 may be a through slot that extends through the first surface C1 and the second surface D1. The heating body 32 is received in the receiving slot 311. Further, an upper surface of the heating body 32 flushes with the first surface C1, and a lower surface of the heating body 32 flushes with the second surface D1. By configuring the receiving slot 311 to be the through slot, the heating body 32 received in the receiving slot 311 may be exposed from a side of the substrate 31 where the first surface C1 is arranged and from a side of the substrate 31 where the second surface D1 is arranged. In this way, after the heating body 32 is inserted into the aerosol-forming substance 102, two surfaces of the heating body 32 may directly contact the tobacco in the aerosol-forming substance 102. Therefore, the energy may be highly utilized, the aerosol-forming substance 102 may be heated more evenly, and a boundary of a pre-defined temperature field may be clear.
In some embodiments, the upper surface and the lower surface of the heating body 32 may protrude slightly above or may be arranged slightly below the first surface C1 and the second surface D1 of the substrate 31, based on actual needs of distribution of the temperature field. In this way, when the upper surface and the lower surface of the heating body 32 protrude slightly above the first surface C1 and the second surface D1 of the substrate 31, the relatively high temperature of the heating body 32 may be concentrated on the upper surface and the lower surface of the heating body 32, and the heating body 32 may bake the tobacco, which contacts the upper surface and the lower surface, at the relatively high temperature, meeting the requirements of generating a smoke having an intensive taste. When the upper surface and the lower surface of the heating body 32 are slightly lower than the first surface C1 and the second surface C2 of the substrate 31, the upper surface and the lower surface of the heating body 32 may loosely contact the tobacco due to the barrier effect generated by the substrate 31, the temperature that the heating body 32 bakes the tobacco may be slightly reduced, meeting the requirements of generating a smoke having a mild taste.
Specifically, in an embodiment, the heating body 32 includes a first extension portion 321 and a second extension portion 322 connected to the first extension portion 321. In another embodiment, the heating body 32 further includes a third extension portion 323 that is entirely inserted into and heat the aerosol- forming substance 102. Specifically, in the present embodiment, the first extension portion 321 and the second extension portion 322 are arranged side by side and are spaced apart from each other. An end of the first extension portion 321 near the second extension portion 322 and an end of the second extension portion 322 near the first extension portion 321 are connected with each other through the third extension portion 323. Specifically, the first extension portion 321, the second extension portion 322, and the third extension portion 323 cooperatively define a cut-groove 328. A detailed structure and function of the heating body 32 formed by the first extension portion 321, the second extension portion 322, and/or the third extension portion 323 may be referred to the structure and the function of the heating body 11 in the heating assembly 30 provided in the first embodiment, which will not be repeated herein.
As shown in FIG. 34, the above-mentioned receiving slot 311 has an opening end and a closed end. Specifically, the receiving slot 311 extends from the first end M of the substrate 31 to a position near the second end N. Further, in an embodiment, the end of the receiving slot 311 away from the second end N of the substrate 31 is the opening end, and the end of the holding slot 311 near the second end N of the substrate 31 is the closed end. By providing one end of the receiving slot 311 as the opening end, relief of the stress, which is generated while the heating body 32 and the substrate 31 are sintered, may be achieved. For example, when no opening is defined, a small stress of the heating body 32 may compress the substrate 31. In addition, when the end M is the opening end, the conductive ceramic may be connected to the electrode leads easily (not shown in the drawings). In the present embodiment, the receiving slot 311 is U-shaped. In the present embodiment, the third extension portion 323 of the heating body 32 is received in the receiving slot 311 and at a position near the closed end. The position of the substrate 31 near the closed end has the tip, allowing the heating body to be inserted into the aerosol-forming substance 102.
In detail, as shown in FIG. 33 and FIG. 34, the heating body 32 may be plate-shaped. Specifically, the heating body 32 may be the heater plate made of the electrically conductive ceramic. The resistivity of the ceramic used for the heater plate may be 5*10-5 ohms, the design power of the ceramic may be 2 watts, and the resistance of the ceramic may be 0.71 ohms. Specifically, the heater plate may be single-strip connection-in-series, and that is, the first extension portion 321, third extension portion 323, and second extension portion 322 are arranged in sequence and are connected in series (slot is defined in the middle).
In an embodiment, as shown in FIG. 34, a bonding layer 34 is disposed at a junction where the substrate 31 is connected to the heating body 32 to strengthen the bonding between the heating body 32 and the substrate 31. Specifically, the bonding layer 34 may be made of an adapted inorganic glass-ceramic, and may be joined to the substrate 31 and the heating body 32 by cosintering. Specifically, the thickness of the bonding layer 34 may be 0.05 mm to 0.1 mm. Of course, in other embodiments, the substrate 31 and the heating body 32 may be seamlessly-spliced with each other.
In a specific implementation, a periphery of the sintered heating body 32 is coated with bonded glass ceramic. Subsequently, the heating body 32 is placed in the receiving slot 311 of the sintered substrate 31. Further, a second sintering may be performed on the substrate 31 and the heating body 32, such that the heating body 32 is embedded into the receiving slot 311 of the substrate 31.
As shown in FIG. 33 and FIG. 34, in a specific embodiment, the heating assembly 30 further includes a first electrode 33a and a second electrode 33b. One of the first electrode 33a and the second electrode 33b is arranged on the first extension portion 321, and the other one of the first electrode 33a and the second electrode 33b is arranged on the second extension portion 322. While the device is in use, the first electrode 33a and the second electrode 33b are electrically connected to the power supply assembly via electrode leads respectively, such that the heating body 32 is electrically connected to the power supply assembly. Specifically, as shown in FIG. 33, the first electrode 33a and the second electrode 33b are arranged on the end of the first extension portion 321 away from the third extension portion 323 and the end of the second extension portion 322 away from the third extension portion 323, respectively; and a surface of the first extension portion 321 where the first electrode 33a is arranged and a surface of the second extension portion 322 where the second electrode 33b is arranged face towards a same direction. In a specific embodiment, when the substrate 31 is the metal substrate, the first electrode 33a and the second electrode 33b may extend to the surface of the substrate 31 made of metal. In this way, when the power is supplied, the substrate 31 made of metal may generate heat, such that the heating efficiency may be improved. Specifically, the end of the first extension portion 321 away from the third extension portion 323 is the first connection end (or the second connection end), and the end of the second extension portion 322 away from the third extension portion 323 is the second connection end (or the first connection end).
In a specific embodiment, as shown in FIG. 34, one of the first extension portion 321 and the second extension portion 322 has a first surface C2 and a second surface D2 opposite to the first surface C2, and the first electrode 33a is arranged on each of the first surface C2 and the second surface D2. The other one of the first extension portion 321 and the second extension portion 322 has a first surface C2 and a second surface D2 opposite to the first surface C2, and the second electrode 33b is arranged on each of the first surface C2 and the second surface D2. That is, the number of first electrodes 33a is two, and the number of second electrodes 33b is two. When the first electrode 33a and the second electrode 33b are connected to two electrode leads, one of the two electrode leads is the Y-shaped electrode lead and is connected to the first electrode 33a arranged on the two surfaces on the first extension portion 321; and the other one of the two electrode leads is the Y-shaped electrode lead and is connected to the second electrode 33b arranged on the two surfaces on the second extension portion 322. By arranging the first electrode 33a and the second electrode 33b on each of the two surfaces, soldering may be performed easily, and the contact area of the heating body 32 made of the conductive ceramic may be increased as much as possible to reduce the contact resistance. In this way, when power is supplied to the heating body 32, a relatively less heat may be generated, the temperature may be reduced. Further, two surfaces of the heating body 32 made of the conductive ceramic may be conducted at the same time, the two surfaces may generate the same electrical potential, such that conductive components of the two surfaces may generate a uniform electric field, and a better heating effect may be achieved. Therefore, the mounting base20 may be arranged at positions where the first electrode 33a and the second electrode 33b are arranged (the resistance of the heating body32 at the first electrode 33a and the second electrode 33b may be low, and a less amount of heat may be generated). In this way, the mounting base 20 may be prevented from being damaged due to high temperatures. Specifically, in the present embodiment, the first electrode 33a and the second electrode 33b may be formed by coating to strengthen the bonding between the electrodes and the heating body 32, such that the stability of the connection between the electrode leads connected to the electrodes and the heating body 32 may be improved.
In a specific embodiment, as shown in FIG. 36, FIG. 36 is a side view of the heating body according to an embodiment of the present disclosure. The surface of the heating body 32 may be coated with the protective layer 35. The protective layer 35 covers the first electrode 33a and the second electrode 33b to prevent oil, which is generated when the tobacco is heated, from damaging the first electrode 33a, the second electrode 33b, and the heating body 32. Specifically, the protective layer 35 may be a vitreous glaze layer. Further, the protective layer 35 may cover the entire substrate 31, such that the entire heating assembly 30 has a smooth surface.
In detail, as shown in FIG. 33, the heating body 32 includes the first heat region A and the second heat region B connected to the first heat region A. The first heat region A is the main atomization region and is inserted into and heat the aerosol-forming substance 102. In this way, the substrate 31 and at least a portion of the heating body 32 are inserted into the aerosol-forming substance102. An atomization temperature on the heating body 32 is concentrated within a range of 280°C to 350°C, and the region in the temperature of 280°C to 350°C occupies more than 75% of an area of the atomization region. The second heat region B is the main mating section of the heating body 32 and has a temperature below 150°C. That is, the temperature of the first heat region A is higher than the temperature of the second heat region B. Further, a portion of the heating body 32 located at the second heat region B is fixed to the mounting base 20 to prevent the mounting base 20 from being damaged when the temperature of the second heat region B is excessively high (for example, the PEEK is plastic and may be melt), or to prevent the mounting base 20 (such as the ceramic mounting base) from transmitting the high temperature to other components of the aerosol-forming device when the temperature of the second heat region B is excessively high, such that the housing may not be excessively hot, or an internal circuit board may not be damaged, and the temperature may not be transferred to reduce the utilization of the heat generated by the first heat region A. In a specific embodiment, the first electrode 33a and the second electrode 33b are specifically arranged at the second heat region B of the heating body 32 to reduce the atomization temperature of the ceramic heating body 32, allowing the ratio of the temperature of the first heat region A to the temperature of the second heat region B of the heating body 32 to be greater than 2. Specifically, the method for controlling the temperatures of the first heat region A and the second heat region B of the heating body 32 may be referred to the solutions described in the first embodiment, and will not be repeated herein.
According to the present disclosure, the heating assembly 30 is provided. The substrate 31 and the heating body 32 are arranged, such that after the heating body 32 is inserted into the aerosol-forming substance 102, the heating body 32 heats the aerosol-forming substance 102. Further, the heating body 32 includes the first extension portion 321 and the second extension portion 322 connected to the first extension portion 321. The substrate 31, the first extension portion 321, and the second extension portion 322 of the heating body 32 are at least partially inserted into the aerosol-forming substance 102, and generate heat to heat the aerosol-forming substance 102 when being conducted. Compared to the resistor heating circuit in the art, which is screen-printed on the substrate, the substrate 31 and the heating body 32 of the present disclosure can be directly and independently inserted into the aerosol-forming substance 102. Further, when the temperature is excessively high, the heating body32 may not fall off from the substrate 31, failure of the heating assembly 30 may not be caused, the stability of the heating assembly 30 may be improved significantly. In addition, by arranging the substrate 31, the heating body 32 is embedded in the substrate 31 to improve the strength of the heating assembly 30, such that while the heating assembly 30 is being inserted into the aerosol-forming substance 102, the heating body 32 may not receive the force directly but may receive the force through the substrate 31, such that the heating body 32 may not be bent.
In an embodiment, as shown in FIG. 34, a first flange 312 is arranged on an inner wall of the through slot near the second surface D1 of the substrate 31 and corresponds to at least a part of the first heat region A of heating body 32. A size of the first flange 312 in the thickness direction is less than the thickness of the heating body 32. The heating body 32 is specifically lapped on a surface of this first flange 312 away from the second surface D1 of the substrate 31, such that the heating body 32 may be prevented from falling out of the through slot of the substrate 31. Specifically, the surface of the first flange 312 flushes with the second surface D1 of the substrate 31 and may be integrally formed with the substrate 31. In the present embodiment, the substrate 31 may be cut by laser to a predetermined size to form the step-shaped substrate 31 having the first flange 312 as described in the above. In this way, dimensional accuracy of the product may be ensured effectively, and a supportive strength of the first flange 312 may be improved significantly.
In an embodiment, as shown in FIG. 34, the first flange 312 extends continuously along a circumferential direction of the through slot to be arranged on the entire inner wall surface of the through slot. To be noted that the size of the first flange 312 in the thickness direction is less than the thickness of the heating body 32, which may be interpreted as the first flange 312 being arranged along the circumferential direction of the through slot to allow the first flange 312 having a same shape as the through slot. When the through slot is a U-shaped slot, the first flange 312 is in a continuous U-shaped structure.
In an embodiment, as shown in FIG. 34 and FIG. 35, for the first heat region A and the second heat region B, the entire or a part of the first heat region A of the heating body 32 may be received in the receiving slot 311, and the second heat region B is arranged in suspension, as shown in FIG. 33. In this case, the heating assembly 30 being inserted into the aerosol-forming substance 102 may be seen in FIG. 35. Alternatively, all positions corresponding to the first heat region A and a small part of positions corresponding to the second heat region B are received in the receiving slot 311, and most of the positions corresponding to the second heat region B are arranged in suspension. In this case, the mounting base 20 is fixed to the suspended part of the heating body 32.
In detail, in the present embodiment, the entire or a part of the substrate 31 may be inserted into the aerosol-forming substance 102, and in this case, the heating body 32 is partially inserted into the aerosol-forming substance 102. Specifically, only the majority or the entire first heat region A of the heating body 32 is inserted into the aerosol-forming substance 102, and the portion corresponding to the second heat region B is disposed out of the aerosol-forming substance 102, i.e., not inserted into the aerosol-forming substance 102. Alternatively, the first heat region A and a small portion of the second heat region B of the heating body 32 are inserted into the aerosol-forming substance 102, and the majority of the portion corresponding to the second heat region B is disposed out of the aerosol-forming substance 102.
In the present embodiment, as shown in FIG. 37 and FIG. 38, FIG. 37 is a schematic view of the heating assembly according to a fifth embodiment of the present disclosure; FIG. 38 is an exploded view of the heating assembly shown in FIG. 37. The portion of the first extension portion 321 disposed at the second heat region B has a first protrusion 3211, and the portion of the second extension portion 322 disposed at the second heat region B has a second protrusion 3221 opposite to the first protrusion 3211, such that the width of the portion of the heating body 32 disposed at the second heat region B is greater than the width of the portion of the heating body 32 disposed at the first heat region A. In this way, the strength of the second heat region B of the heating body32 is ensured. Further, the resistance of the second heat region B is smaller than the resistance of the first heat region A of the heating body 32, and the temperature corresponding to the second heat region B of the heating body32 is lower. Specifically, in the present embodiment, the length of the substrate 31 is less than the length of the heating body 32.
Specifically, the first protrusion 3211 and the second protrusion 3221 abut against the end of the substrate 31. In a specific embodiment, the receiving slot 311 has two opposite side walls, and the width of each of the two opposite side walls is W26. Each of the width W25 of the first projection portion 3211 and the width W25 of the second projection portion 3221 may be the same as the width W26. The two opposite side walls of the receiving slot 311 refers to two extension portions of the substrate 31 that are spaced apart from each other and are arranged parallel to each other. Further, in an embodiment, as shown in FIG. 38, each of the end of the first extension portion 321 away from the third extension portion 323 and the end of the second extension portion 322 away from the third extension portion 323 is arranged with a second flange 313 flushing with the first flange 312. Each of a position of the first projection 3211 corresponding to the second flange 313 and a position of the second projection 3221 corresponding to the second flange 313 is arranged with a first reserved portion 324. The first reserved portion 324 is lapped on the second flange 313, such that the second heat region B of the heating body 32 may be supported by the second flange 313.
In detail, forthe first heat region A and the second heat region B, when only the first heat region A of the heating body 32 is received in the receiving slot 311, two first flanges 312 are arranged only at positions of the inner wall surface of the receiving slot 311 corresponding to a part of the first heat region A of the heating body 32, a portion of the first heat region A of the heating body 32 is lapped on the two first flanges 312.
In a specific embodiment, a size of the heating body 32 corresponding to FIG. 34 is shown in FIG. 39, and FIG. 39 is a schematic view showing the size of the heating assembly shown in FIG. 37. The total width of the substrate 31 may be in a range from 6 mm to 10 mm, such as may be 6 mm. The total thickness of the substrate 31 may be in a range from 0.3 mm to 0.6 mm, such as may be 0.5 mm. The width of the first surface C1 of the substrate 31 may be in a range from 0.5 mm to 1 mm, such as may be 0.75 mm. The width of the second surface D1 of the substrate 31 may be in a range from 1 mm to 2 mm, such as may be 1.25 mm. In the present embodiment, the thickness of the first flange 312, i.e., the thickness along the axial direction of the receiving slot 311, may be in a range from 0.2 mm to 0.3 mm, such as may be 0.25 mm. The axial length of the first flange 312 may be in a range from 6 mm to 10 mm, such as may be 6.00 mm. The length L22 of the heating body 32 received in the receiving slot 311 may be in a range from 10 mm to 17 mm, such as may be 16.1 mm. The width W24 of the portion lapped on the first flange 312 may be in a range from 2 mm to 5 mm, such as may be 3.4 mm. The width W27 of the portion snapped between the two first flanges 312 may be in a range from 2 mm to 3 mm, such as may be 2.4 mm. Each of the length L23 of the first extension portion 321 and the length L23 of the second extension portion 322 may be in a range from 13 mm to 16 mm, such as may be 14.55 mm. The spacing between the first extension portion 321 and the second extension portion 322 is less than one tenth of the width of the entire heating body 32. The spacing L24 between the first extension portion 321 and the second extension portion 322 may be in a range from 0.25 mm to 0.35 mm, for example, the spacing L24 between the two extension portions may be specifically 0.3 mm. Specifically, the height corresponding to the first reserved portion 324 is the same as the thickness H22 of the first flange 312. Specifically, an error for each of the above dimensions is not greater than 0.05 mm.
In some embodiments, as shown in FIGs. 40 to 42, FIG. 40 is a schematic view of the mounting base being assembled with the heating assembly according to an embodiment of the present disclosure; FIG. 41 is a schematic view of the mounting base being assembled with the heating assembly according to another embodiment of the present disclosure; and FIG. 42 is an exploded view of the product shown in FIG. 41. In detail, when the portion of the first extension portion 321 disposed at the second heat region B and the portion of the second extension portion 322 disposed at the second heat region B are not arranged with the protrusion, the structure of the product formed by the mounting base 20 being fixed to the heating assembly 30 can be seen in FIG. 40. When each of the portion of the first extension portion 321 disposed at the second heat region B and the portion of the second extension portion 322 disposed at the second heat region B is arranged with the protrusion, the structure of the product formed by the mounting base 20 being fixed to the heating assembly 30 can be seen in FIG. 41 and FIG. 42.
As shown in FIG. 43 and FIG. 44, FIG. 43 is a schematic view of the mounting base being assembled with the heating assembly according to still another embodiment of the present disclosure; and FIG. 44 is an exploded view of the heating assembly of the product shown in FIG. 43 according to an embodiment of the present disclosure. In the present embodiment, a heating assembly 30 is provided and includes a heating body 91, a first electrode 92a, and a second electrode 92b.
The heating body 91 is configured to be inserted into and heat the aerosol-forming substance 102. Compared to the resistor heating circuit in the art, which is formed by screen-printing or coating on the substrate, the heating body 91 of the present disclosure can be directly and independently inserted into the aerosol-forming substance 102, and when the heating assembly is heated to a high temperature, the heating body 11 may not fall of from the substrate, and failure of the heating assembly may not be caused, the stability of the heating assembly 30 may be improved. Specifically, the heating body 91 has a first connection end E and a second connection end F opposite to the first connection end. When the heating body 91 is being inserted into the tobacco, the second connection end F of the heating body 91 is inserted into the tobacco firstly. Therefore, to facilitate the heating body 91 to be inserted into the tobacco, the second connection end F of the heating body 91 may be configured with the tip, i.e., configured in a triangular structure, forming a tip portion D. An angle between two adjacent sides of the tip may be in a range from 45 degrees to 90 degrees, such as 60 degrees. It shall be understood that each of the first connection end E and the second connection end F in the present disclosure refers to a certain area occupied by the respective end, instead of an end point or an end surface. Specifically, the first electrode 92a and the second electrode 92b are specifically arranged at (i.e., located at) the first connection end E of the heating body 91. Further, the first electrode 92a is electrically connected to the first connection end E of the heating body 91, and the second electrode 92b is insulated from the first connection end E of the heating body 91, such that a short circuit may be prevented. Further, the second electrode 92b extends from the first connection end E to the second connection end F of the heating body 91 and is electrically connected to the second connection end F, such that a current circuit is formed between the first connection end E and the second connection end F of the heating body 91. In this way, the heating assembly may be processed easily, and the overall strength of the heating assembly 30 may be improved. Further, a less amount of tobacco may be adhered to the heating assembly 30 while the device is in use, and a less amount of oil may be adhered to the heating assembly 30 after the atomization.
Specifically, a shape and a size of the heating body 91 is not limited and may be determined as desired. In a specific embodiment, the heating body 91 may be strip shaped, such as rectangular, and an end of the rectangle forms a tip.
In detail, as shown in FIG. 43, the heating body 91 includes the first heat region A and the second heat region B connected to the first heat region A. The first heat region A is the main atomization region and is inserted into the aerosol-forming substance 102 to heat the aerosol-forming substance 102. The atomization temperature on the first heat region A is concentrated within a range of 280°C to 350°C, and the concentrated area occupies more than 75% of the area of the atomization region. The second heat region B is the main mating section of the heating body 91 and has a temperature below 150°C. That is, the temperature of the first heat region A is higher than the temperature of the second heat region B. Further, the portion of the heating body 91 located at the second heat region B is fixed to the mounting base 20 to prevent the mounting base 20 from being damaged when the temperature of the second heat region B is excessively high (for example, the PEEK is plastic and may be melt), or to prevent the mounting base 20 (such as the ceramic mounting base) from transmitting the high temperature to other components of the aerosol-forming device when the temperature of the second heat region B is excessively high, such that the housing may not be excessively hot, or an internal circuit board may not be damaged, and the temperature may not be transferred to reduce the utilization of the heat generated by the first heat region A. In the present embodiment, a ratio of the heating temperature of the first heat region A to the heating temperature of the second heat region B of the heating body 11 is greater than 2. In a specific embodiment, the first electrode 92a is arranged at the second heat region B of the heating body 91 to reduce the atomization temperature of the ceramic heating body 91 disposed at the second heat region B. It shall be understood that the first connection end E of the heating body 91 is disposed at the second heat region B of the heating body 91, and the second connection end F is disposed at the first heat region A of the heating body 91. Specifically, materials of the first heat region A and the second heat region B of the heating body 91 and a method of controlling temperatures of the first heat region A and the second heat region B can be referred to the method of controlling the temperatures of the first heat region A and the second heat region B as described in the first embodiment above and will not be repeated herein.
In a specific embodiment, for the first heat region A and the second heat region B of the heating body 91, only a majority of the first heat region A is inserted into the aerosol-forming substance102, and a small portion of the first heat region A and the entire second heat region B are disposed out of the aerosol-forming substance 102. Alternatively, the entire first heat region A is inserted into the aerosol-forming substance 102, and the entire second heat region B is disposed out of the aerosol-forming substance 102. Alternatively, the entire first heat region A and a small portion of the second heat region B are inserted into the aerosol-forming substance 102, and the majority of the second heat region B is disposed out of the aerosol-forming substance 102. In this case, the portion of the heating body 91 that is disposed out of the aerosol-forming substance 102 is fixed to the mounting base 20.
In detail, the first electrode 92a and the second electrode 92b in the present embodiment may be arranged on the surface of the heating body 91 by coating to strengthen the bonding between the first electrode 92a and the second electrode 92b and the heating body 91. In this way, the stability of the connection between the electrode leads 95, which are connected to the first electrode 92a and the second electrode 92b, and the heating body 91 may be improved.
In an embodiment, as shown in FIG. 44, the heating body 91 may be plate shaped and includes a body portion C and the tip portion D connected to an end of the body portion C. The second connection end F of the heating body 91 is the tip portion D. The first connection end E of the heating body 92 is the end of the body portion C away from the tip portion D. An end of the second electrode 92b away from the second connection end F is arranged on the first connection end E of the heating body 92. The body portion C may be rectangular, and the tip portion D may be triangular, arc-shaped or isosceles trapezoidal.
In detail, the heating body 91 may be an elongated heater plate.
In an embodiment, as shown in FIG. 44, the first electrode 92a and the second electrode 92b are arranged on opposite sides of the heater plate. In detail, the first electrode 92a is coated on the second surface N of the heater plate and is electrically connected to the first connection end E of the heater plate. The second surface N of the heater plate opposite to the first surface M is arranged with an insulating layer 93. The insulating layer 93 extends from the first connection end E of the heater plate to a position near the second connection end F. A part of the first surface M disposed at the second connection end F of the heating body 91 is exposed out of the insulating layer 93. The second electrode 92b is arranged on a surface of the insulating layer 93 away from the heater plate and extends towards the second connection end F of the heating body 91. A portion of the second electrode 92b extends out of the insulating layer 93 to contact and to be electrically connected with the second connection end F of the heater plate. It shall be understood that the first electrode 92a may be coated on the first surface M, the second surface N, and a side of the heater plate, i.e., forming a ring. The portion of the first electrode 92a coated on the first surface M of the heater plate is disposed between the insulating layer 93 and the heater plate.
In detail, the first electrode 92a may be rectangular, and the insulating layer 93 may be T-shaped. Specifically, the second electrode 92b includes a first coating portion 921, a second coating portion 922, and a third coating portion 923. The first coating portion 921 is coated on a surface of the insulating layer 93 away from the heating body 91 and is opposite to the first electrode 92a. A shape of the first coating portion 921 may be the same as a shape of the first electrode 92a. The second coating portion 922 is connected to the first coating portion 921 and is coated on a surface of the insulating layer 93 away from the heating body 91. A shape of the second coating portion 922 may be the same as a shape of an extension portion of the insulating layer 93. The third coating portion 923 is connected to the second coating portion 922. The third coating portion 923 is directly coated on the first surface M of the heating body 91 and is electrically connected to the second connecting end F of the heating body 91. The third coating portion 923 is perpendicular to the second coating portion 922 and may be a rectangular strip. In detail, the first coating portion 921, the second coating portion 922, and the third coating portion 923 cooperatively form an I-shaped structure. It shall be understood that the insulating layer 93 and the second electrode 92b are not limited to the above-mentioned shapes and may be determined as desired. In specific embodiments, sizes of the first coating portion 921, the second coating portion 922, and the third coating portion 923 are less than sizes of the insulating layer 93 at corresponding positions. In the present disclosure, the first electrode 92a and the second electrode 92b are both arranged on the heater plate by coating. In other embodiments, the first electrode 92a and the second electrode 92b may be arranged on the heater plate by sputtering, coating, screen-printing, and so on.
In an embodiment, at least one surface of the heating body 91 is further coated with a protective layer 94. The protective layer 94 covers at least the first electrode 92a and the second electrode 92b to prevent the first electrode 92a and the second electrode 92b from being damaged by the oil, which is generated while the tobacco is being heated. Of course, the protective layer 94 may cover the entire surface of the heating body 91 (see FIG. 44), such that the entire heating body 91 has a smooth surface while the first electrode 92a and the second electrode 92b are protected. Specifically, the protective layer 94 may be a vitreous glaze layer.
In another specific embodiment, as shown in FIG. 45, FIG. 45 is an exploded view of the heating assembly of the product shown in FIG. 43 according to another embodiment of the present disclosure. Being different from the above embodiments, in the present embodiment, the first electrode 92a and the second electrode 92b are arranged on a same side of the heating body 91. Specifically, the first electrode 92a is coated on the first surface M of the heating body 91 and is electrically connected to the first connection end E of the heater plate. Specifically, the surface of the first electrode 92a away from the heater plate is arranged with the insulating layer 93. The insulating layer 93 covers the first electrode 92a and extends from the first connection end E of the heater plate to a position near the second connection end F. The second electrode 92b is arranged on a surface of the insulating layer 93 away from the first electrode 92a and extends towards the second connection end F of the heating body 91. A portion of the second electrode 92b extends out of the insulating layer 93 to contact and to be electrically connected to the second connection end F of the heater plate.
In detail, the first electrode 92a may have rectangular, and the insulating layer 93 may be T-shaped. Specifically, a shape of a portion of the insulating layer 93 that covers the first electrode 92a is the same as a shape of the first electrode 92a, and a size of the portion of the insulating layer 93 that covers the first electrode 92a is slightly greater than or equal to a size of the first electrode 92a. It shall be understood that the shape and the size of the portion of the insulating layer 93 that covers the first electrode 92a is not limited, as long as the portion can insulate the first electrode 92a from the second electrode 92b. For example, the insulating layer 93 covers the entire first electrode 92a or a part of the first electrode 92a, but the size of the insulating layer 93 is greater than the size of the second electrode 92b.
In a specific embodiment, another first electrode 92a is arranged on a position of the second surface N of the heating body 91 opposite to the first electrode 92a, and another second electrode 92b is arranged at a position opposite to the second electrode 92b through the insulating layer 93. That is, the number of first electrodes 92a is two, and the number of second electrodes 92b is two. In this way, the conductive components of the conductive ceramic are disposed near the two surfaces of the conductive ceramic and may generate a shorter current path, such that a temperature field of the two surfaces of the heating body 91 may be more uniform.
According to the present disclosure, the heating assembly 30 is arranged with the heating body 91. The heating body 91 is inserted into the aerosol-forming substance 102 to heat the aerosol-forming substance 102. Compared to the resistor heating circuit in the art, which is screen-printed or coated on the substrate, the heating body 91 of the present disclosure may be directly and independently inserted into the aerosol-forming substance 102. Further, when the temperature is excessively high, the heating body 91 may not fall off from the substrate, failure of the heating assembly 30 may not be caused, the stability of the heating assembly 30 may be improved significantly. In addition, the heating body 91 is configured to be plate-shaped, the contact area between the aerosol-forming substance 102 and the heating body 91 is effectively increased, and the energy utilization and the heating efficiency may be improved. In addition, the first electrode 92a and the second electrode 92b insulated from the first electrode 92a are arranged, the first electrode 92a is arranged at the first connection end E of the heating body 91 and is electrically connected to the first connection end E, and an end of the second electrode 92b is connected to the second connection end F. In this way, the current circuit is formed between the first connection end E and the second connection end F of the heating body 91. The short circuit may be solved, the processing may be simpler, and the strength of the heating assembly 30 may be improved.
Of course, in other embodiments, as shown in FIG. 46 and FIG. 47, FIG. 46 is a cross sectional view of the heating bodies, which are arranged side-by-side, according to an embodiment of the present disclosure; and FIG. 47 is a cross sectional view of the heating bodies, which are arranged side-by-side, according to another embodiment of the present disclosure. The heating assembly 30 includes at least two heating bodies 91. The at least two heating bodies 91 are arranged side by side. In a specific embodiment, the number of the at least two heating bodies 91 may be two, and the two heating bodies 91 are arranged opposite to each other. The insulating layer 93 is disposed between the two heating bodies 91.
In a specific embodiment, as shown in FIG. 46, each of a surface of one of the two heating bodies 91 away from the other one of the two heating bodies 91 and a surface of the other of the two heating bodies 91 away from the one of the two heating bodies 91 is arranged with the first electrode 92a, and the first electrode 92a is arranged at the first connection end E of each of the two heating bodies 91. In the present embodiment, the second electrode 92b is arranged on the insulating layer 93 and extends from the first connection end E of the heating body 91 to the position near the second connection end F. The second electrode 92b is electrically connected to the second connection end F of each of the two heating bodies 91. In this way, for each of the two heating bodies 91, the current circuit is generated between the first electrode 92a and the second electrode 92b; and the two heating bodies 91 are arranged side by side.
In another embodiment, as shown in FIG. 47, the first electrode 92a is arranged at a position of the insulating layer 93 corresponding to the first connection end E of the heating body 91, and is electrically connected to the first connection end E of each of the two heating bodies 91. In the present embodiment, the second connection end F of each of the two heating bodies 91 is connected to a corresponding second electrode 92b. In this way, the two heating bodies 91 are connected with each other side by side by allowing the first electrode 92a to be connected to the respective second electrode 92b of each of the two heating bodies 91. Specifically, each of the surface of one of the two heating bodies 91 away from the other one of the two heating bodies 91 and the surface of the other of the two heating bodies 91 away from the one of the two heating bodies 91 is coated with the insulating layer 93. For each of the two heating bodies 91, the second electrode 92b is arranged on a surface of the insulating layer 93 away from the heating body 91, and the second electrode 92b extends from the first connection end E of the heating body 91 to the position near the second connecting end F to be connected to the second connecting end F of the heating body 91.
In another embodiment, as shown in FIG. 48, FIG. 48 is a schematic view of the heating assembly according to a sixth embodiment of the present disclosure. Being different from the first embodiment above, in the present embodiment, the heating body 91 may be cylindrical and may include the body portion C and the tip portion D connected to the end of the body portion C. The second connection end F of the heating body 91 is the tip portion D. The first connection end E of the heating body 91 is the end of the body portion C away from the tip portion D. In a specific embodiment, the body portion C may be cylindrical, and the tip portion D may be conical or domeshaped. Specifically, the heating body 91 may be the heater stick as shown in FIG. 48. The second connection end F of the heater stick may be the tip, enabling the heater stick to be inserted into the aerosol-forming substance 102 easily.
Specifically, as shown in FIG. 49, FIG. 49 is an exploded view of the structure shown in FIG. 48, according to an embodiment of the present disclosure. The first electrode 92a is arranged on at least a part of the surface of the first connection end E of the heater stick. The outer wall of the body portion C of the heater stick is arranged with the insulating layer 93. The insulating layer 93 extends from the first connection end E of the heater stick to a position near the second connection end F, and a position of the body portion C near the tip portion D is exposed out of the insulating layer 93. The second electrode 92b is arranged on the surface of the insulating layer 93 away from the heater stick. A portion of the second electrode 92b extends out of the insulating layer 93 and contacts the second connecting end F of the heater stick. That is, the portion of the second electrode 92b extends out of the insulating layer 93 and contacts the second connection end F, which is located at a position of the body portion C of the heating body 91 near the tip portion D and is exposed out of the insulating layer 93.
Further, in a specific embodiment, the first electrode 92a surrounds the outer wall of the heater stick and may be arc shaped. In the present embodiment, the insulating layer 93 is arranged in the circumferential direction of the heater stick and forms one loop. The insulating layer 93 has a notch at a position corresponding to a position of the heater stick where the first electrode 92a is arranged. At least a portion of the first electrode 92a is exposed through the notch, enabling the first electrode 92a to be connected to the electrode leads 95. In a specific embodiment, the portion of the second electrode 92b extending to the outside of the insulating layer 93 may surround the body portion C of the heater stick and may be ring shaped, ensuring the second electrode 92b to be effectively connected to the second connection end F of the heater stick. Of course, in other embodiments, the first electrode 92a may further include a bottom surface that extends to a position near the first connection end E of the heater stick to strengthen the overall bonding and improve electrical reliability.
In another embodiment, the first electrode 92a surrounds the outer wall of the heater stick and may be arc shaped. The insulating layer 93 may cover the entire first electrode 92a and surrounds the outer wall of the heater stick to form one loop. The present embodiment does not specifically limit the above structure, as long as the short circuit between the first electrode 92a and the second electrode 92b can be prevented by the insulating layer 93.
In a specific embodiment, at least one surface of the heater stick is coated with the protective layer 94. The protective layer 94 covers at least the first electrode 92a and the second electrode 92b to the first electrode 92a and the second electrode 92b from being damaged by the oil, which is generated when the tobacco is being heated. Of course, in other embodiments, as shown in FIG. 50, FIG. 50 is a schematic view of the heating assembly where the protective layer is coated on the entire surface of the heater stick, according to an embodiment of the present disclosure. The protective layer 94 may cover the entire surface of the heater stick. In this way, the first electrode 92a, the second electrode 92b, and the heater stick are protected, while the entire heater stick has a smooth surface. Specifically, the protective layer 94 may be the vitreous glaze layer.
In a specific embodiment, the resistance of the heater stick may be in a range from 0.3 ohms to 1 ohm, such as 0.6 ohms; the resistivity of the heater stick may be in a range from 1^∗10^-4 ohms to 4^∗10^-4 ohms, specifically may be 2^∗10^-4 ohms; and an in-use power of the heater stick may be in a range of 2 watts to 5 watts, specifically may be 3.5 watts. Specifically, as shown in FIG. 50, the overall length L41 of the heater stick may be in a range from 18 mm to 20 mm. The length L42 of the portion of the heater stick inserted into the tobacco may specifically be in a range from 14 mm to 15 mm. The diameter ϕ of the portion of the heater stick inserted into the tobacco may specifically be in a range from 2.0 mm to 3.0 mm, such as 3 mm.
To be noted that, while performing the processing, a silver pole is firstly coated on the heater stick to form the electrode. Subsequently, an insulating medium layer is coated on the rest of the surface of the heater stick. Further, the electrode leads 95 are soldered, such that the electrode leads 95 are prevented from contacting the heater stick.
Specifically, in the above embodiments, the heating body 91 may be cylindrical, such that the heating body 91 may be inserted into the tobacco easily, and the cylindrical heating body 91 may be processed easily, reducing the processing difficulty effectively.
In detail, the above-mentioned heating body 11 (or 32 or 91) may be a self-supporting structure. That is, the heating body 11 (or 32 or 91) may be configured independently without any other carrier. Compared to the resistor heating circuit in the art, which is formed by being screen-printed or coated on the substrate, in the present disclosure, the self-supporting structure of the heating body 11 (or 32 or 91) may be directly and independently inserted into the aerosol-forming substance 102. Further, when the temperature is excessively high, the heating body 91 may not fall off from the substrate, and the stability of the heating assembly 30 may be improved significantly. Since the heating body 11 (or 32 or 91) is the self-supporting structure, the heating body is not required to engage with the substrate. Two opposite surfaces of the heating body 11 (or 32 or 91) may directly contact the tobacco inside the aerosol-forming substance 102, such that a high energy utilization rate is achieved, the tobacco may be heated more uniformly, the pre-defined temperature field has a clear boundary, and especially, when the device is initiated at a low pressure, a power may be controlled and determined in real time.
In detail, the heating body 11 (or 32 or 91) may be made of conductive ceramics. Compared to the heating body in the art made of metals, the heating body made of conductive ceramics has a high conductive efficiency, and the temperature generated by heating may be uniformed distributed on the heating body. Further, a power of the heating body 11 (or 32 or 91) made of conductive ceramics may be adjusted between 3 watts and 4 watts, a conductive efficiency of the heating body 11 (or 32 or 91) made of conductive ceramics may be in a range of 1^∗10^-4 to 1^∗10^-6 ohms. A strength of the heating body 11 (or 32 or 91) made of conductive ceramics against bending may be greater than MPa. A fire-resistance of the heating body 11 (or 32 or 91) made of conductive ceramics may be higher than 1200°C. In addition, the heating body 11 (or 32 or 91) made of conductive ceramics may have a full starting voltage.
In detail, an electromagnetic heating wavelength of the heating body 11 (or 32 or 91) made of the ceramic is a mid-infrared wavelength, allowing the tobacco oil to be atomized easily and providing an improved taste. In addition, the ceramic used to make the heating body 11 (or 32 or 91) is oxide ceramic, and a microcrystalline structure of the ceramic is stable at high temperatures. Since the oxide ceramic is highly resistant to fatigue, has a high strength, and has a high density, harmful heavy metal volatilization and dust may be avoided, significantly increasing the service life of the heating body 11 (or 32 or 91).
According to the above embodiments, the heating body 11 (or 32 or 91) may be an entire sheet of ceramics, such that an area of the highest temperature hot spot may be reduced, a risk of fatigue cracking and an increase in the resistance due to the fatigue may be eliminated, and the heating body 11 (or 32 or 91) may have better consistency. Further, since the ceramic heating material has a high strength, and the microcrystalline structure of the ceramic heating material provides smoothness, the surface of the heating body 11 (or 32 or 91) may be cleaned easily, and substances may not be adhered to the surface of the heating body easily. In addition, the heating body 11 (or 32 or 91) may be produced by performing a ceramic production process. The ceramic production process includes raw material mixing, forming and sintering, and a cutting process. The ceramic production process may be simple and may be controlled easily, and costs of the ceramic production process may be low. Therefore, the ceramic production process may be promoted for batch manufacturing, and economic benefits may be improved.
In detail, the heating body 11 (or 32 or 91) made of the conductive ceramic includes a main component and a crystalline component. The main component is configured to conduct electricity and to allow the conductive ceramic of the heating body 11 (or 32 or 91) to generate a certain resistance. The main component may specifically be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium. The crystalline component, i.e., the main material of the ceramic, is configured to form the shape and the structure of the conductive ceramic. The crystalline component may specifically be one or more of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide. In other embodiments, the heating body 11 (or 32 or 91) may be made of a ceramic alloy made of metal alloys, or a ceramic alloy made of iron-silicon alloys or iron-silicon-aluminum alloys.
The heating assembly 30 provided in the present embodiment may directly take the self-supporting ceramic heater plate (or heater stick) to generate heat. Further, the heating body 11 (32 or 91) may be arranged as single-strip connected in series based on locations where the electrodes are arranged and requirements about resistance values. In addition, the heating body 11 (or 32 or 91) is made of ceramic. Compared to the resistor heating circuit in the art, which is formed by coating a metal heating material on the substrate, two sides of the heating body 11 (or 32 or 91) made of ceramic may contact and heat the tobacco simultaneously, such that the tobacco may be heated more uniformly and stably.
As shown in FIG. 51, FIG. 51 is a schematic view of the aerosol-forming device according to an embodiment of the present disclosure. In the present embodiment, an aerosol-forming device 100 is provided and includes a housing 101, and the heater assembly 10 arranged inside the housing 101, and a power supply assembly 40 arranged inside housing 101.
The heater assembly 10 may be the heater assembly 10 provided in the above embodiments. The specific structure and function of the heater assembly 10 may be referred to the description of the heater assembly 10 in the above embodiments and will not be repeated here. Specifically, the heater assembly 10 is mounted on the inner wall of the housing 101 through the mounting base 20. Further, the heater assembly 10 is connected to the power supply assembly 40, such that the power supply assembly 40 supplies power to the heating body in the heater assembly 10. Specifically, the power supply assembly 40 may be a rechargeable lithium-ion battery.
The aerosol-forming device 100 in the present embodiment is arranged with the heater assembly 10, and the heater assembly 10 is arranged with the heater assembly 30. The heater assembly 30 includes the heating body 11 (or 32 or 91). At least a part of the heating body 11 (or 32 or 91) is inserted into and heat the aerosol-forming substance 102. Compared to the resistor heating circuit in the art, which is screen-printed on the substrate, the heating body 11 (or 32 or 91) of the present disclosure can be directly and independently inserted into the aerosol-forming substance 102. Further, when the temperature is excessively high, the heating body may not fall off from the substrate, failure of the heating assembly may not be caused, and the stability of the heating assembly 30 may be improved significantly. In addition, the mounting base 20 is arranged. The heating body 11 (or 32 or 91) is fixed to the mounting base 20, such that the heating assembly 30 is fixedly arranged inside the aerosol-forming device 100 by the mounting base 20. The heating body 11 (or 32 or 91) itself can be independently inserted into the aerosol-forming substance 102, i.e., the heating body 11 (or 32 or 91) is substantially the self-supporting structure. Compared to the resistor heating circuit in the art, which is a thin film, the mounting base20 being fixed to the heating body 11 (or 32 or 91) may effectively avoid the problem of the mounting base 20 affecting the resistor heating circuit. Further, the mounting base 20 may be mounted without a separate mounting plate, the production costs are reduced effectively.
The above description shows only embodiments of the present disclosure and does not limit the scope of the present disclosure. Any equivalent structure or equivalent process transformation performed based on the description and the accompanying drawings of the present disclosure, applied directly or indirectly in other related fields, shall be equally covered by the scope of the present disclosure.

Claims

A heater assembly, comprising:
a mounting base; and

a heating assembly, comprising a heating body, wherein the heating body has a first connection end and a second connection end opposite to the first connection end; and

wherein the heating body is fixed to the mounting base, and at least a portion of the heating body is configured to be inserted into and heat an aerosol-forming substance.
The heater assembly according to claim 1, wherein the heating body comprises a first heat region and a second heat region connected to the first heat region, a temperature of the second heat region is lower than a temperature of the first heat region, a portion of the heating body disposed at the second heat region is fixed to the mounting base, and a portion of the heating body disposed at the first heat region is configured to be inserted into and heat the aerosol-forming substance.
The heater assembly according to claim 2, wherein the heating assembly further comprises:
a first electrode, electrically connected to the first connection end of the heating body; and

a second electrode, electrically connected to the second connection end of the heating body.
The heater assembly according to claim 3, wherein the heating body comprises a first extension portion and a second extension portion, the second extension portion is spaced apart from the first extension portion and is connected to an end of the first extension portion;
each of the first extension portion and the second extension portion is configured to be at least partially inserted into the aerosol-forming substance; and

when the heating body is supplied with power, each of the first extension portion and the second extension portion is configured to generate heat to heat the aerosol-forming substance.
The heater assembly according to claim 4, wherein the first extension portion and the second extension portion are arranged side by side and are spaced apart from each other;
the heating assembly further comprises a third extension portion, which is configured to be entirely inserted into and to heat the aerosol-forming substance;

an end of the first extension portion near the second extension portion and an end of the second extension portion near the first extension portion are connected with each other through the third extension portion;

the first electrode is arranged at an end of the first extension portion away from the third extension portion, and the second electrode is arranged at an end of the second extension portion away from the third extension portion.
The heater assembly according to claim 4, wherein the heating assembly further comprises a fixing sleeve, and the fixing sleeve sleeves the outside of the heating body.
The heater assembly according to claim 5, wherein the heating assembly further comprises a substrate, the substrate has a receiving slot;
for the first heat region and the second heat region of the heating body, only the first heat region is embedded in the receiving slot of the substrate, and at least a portion of the substrate is inserted into the aerosol-forming substance.
The heater assembly according to claim 7, wherein the substrate has a first surface and a second surface opposite to the first surface, the receiving slot is a through slot that extends through the first surface and the second surface, allowing the portion of the heating body disposed at the first heat region to be exposed from a side where the first surface is arranged and from a side where the second surface is arranged.
The heater assembly according to claim 7, wherein a first flange is arranged at the receiving slot at a position that is near the second surface of the substrate and corresponds to at least a portion of the first heat region of the heating body; and
the portion of the heating body disposed at the first heat region is lapped on the first flange.
The heater assembly according to claim 9, wherein a portion of the first extension portion disposed at the second heat region has a first protrusion, and a portion of the second extension portion disposed at the second heat region has a second protrusion opposite to the first protrusion;
each of the first protrusion and the second protrusion abuts against the end of the substrate; and

each of the first protrusion and the second protrusion is inserted into the mounting base.
The heater assembly according to claim 10, wherein the end of the substrate abutting against the first protrusion and the second protrusion is arranged with a second flange;
each of the first protrusion and the second protrusion is arranged with a first reserved portion at a position corresponding to the second flange; and

the first reserved portion is lapped on the second flange.
The heater assembly according to claim 3, wherein the first electrode and the second electrode are insulated from each other; the first electrode is arranged at the first connection end of the heating body and is electrically connected to the first connection end; and
an end of the second electrode is electrically connected to the second connection end, and the other end of the second electrode extends towards the first connection end of the heating body.
The heater assembly according to claim 12, wherein the heating body is plate-shaped and comprises a body portion and a tip portion connected to an end of the body portion;
the second connection of the heating body is the tip portion, the first connection end of the heating body is an end of the body portion away from the tip portion; and

an end of the second electrode away from the second connection is arranged at the first connection end of the heating body.
The heater assembly according to claim 13, wherein the first electrode is arranged on a first surface of the heating body;
an insulating layer is arranged on a second surface of the heating body, the insulating layer extends from the first connection end of the heating body to a position near the second connection end, the second surface of the heating body disposed at the second connection end is exposed out of the insulating layer, the second electrode is arranged on a surface of the insulating layer away from the heating body, a portion of the second electrode extends to the outside of the insulating layer and is in contact with the second connection end of the heating body; wherein the first surface is opposite to the second surface.
The heater assembly according to claim 13, wherein the first electrode is arranged on a first surface of the heating body;
an insulating layer is arranged on a surface of the first electrode away from the heating body, the insulating layer extends from the first connection end of the heating body to a position near the second connection end, the second electrode is arranged on a surface of the insulating layer away from the first electrode, and a portion of the second electrode extends to the outside of the insulating layer and is in contact with the second connection end of the heating body.
The heater assembly according to claim 12, wherein the heating body is in cylindrical and comprises a body portion and a tip portion connected to an end of the body portion; the second connection end of the heating body is the tip portion; and the first connection end of the heating body is an end of the body portion away from the tip portion.
The heater assembly according to claim 16, wherein the first electrode is arranged on at least a portion of the surface of the first connection end of the heating body;
the outer wall of the body portion of the heating body is arranged with an insulating layer,

the insulating layer extends from the first connection end of the heating body to a position near the second connection end, and a portion of the body portion near the tip portion is exposed out of the insulating layer, the second electrode is arranged on a surface of the insulating layer away from the heating body; and a portion of the second electrode extends to the outside of the insulating layer and contacts the second connection end, which is located at a position of the body portion of the heating body near the tip portion and is exposed out of the insulating layer.
The heater assembly according to claim 1, wherein the heating body is made of conductive ceramic.
The heater assembly according to claim 18, wherein the conductive ceramic of the heating body comprises a main component and a crystalline component; the main component is one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium; and the crystalline component is one or more of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide, and yttrium oxide.
The heater assembly according to claim 3, wherein the mounting base comprises a mounting body and a mounting hole defined in the mounting body, at least partial position of the portion of the heating body disposed at the second heat region is inserted in the mounting hole to be fixed to the mounting base.
The heater assembly according to claim 20, wherein the mounting hole is a through hole, and a size and a shape of the mounting hole matches with a shape and a size of the portion of the heating body inserted into the mounting hole.
The heater assembly according to claim 20, wherein two reserved slots are arranged in the mounting hole, the two reserved slots extend in an axial direction of the mounting hole and are configured to allow electrode leads to extend through.
The heater assembly according to claim 20, wherein the mounting body is arranged with at least two fastening portions, configured to fix the mounting base to a housing of an aerosol-forming device.
The heater assembly according to claim 20, wherein the mounting body is arranged with at least one extension slot, at least one extension slot is communicated with the mounting hole to fix the portion of the heating body inserted in the mounting hole.
An aerosol-forming device, comprising: a housing, the heater assembly according to claim 1, and a power supply assembly, wherein the heater assembly and the power supply assembly are arranged inside the housing; the power supply assembly is connected to the heating body and is configured to supply power to the heating body.