KR20230011411A - Heating assembly and aerosol forming device - Google Patents

Abstract

In the heating assembly 90 and the aerosol forming device 900, the heating assembly 90 includes a heating element 91, a first electrode 92a, and a second electrode 92b. Here, the heating element 91 is used to insert and heat the aerosol-forming substrate 98. The heating element 91 includes a first connection end (E) and a second connection end (F) facing the first connection end (E). The first electrode 92a is positioned at the first connection end E of the heating element 91 and is electrically connected to the first connection end E. One end of the second electrode 92b is electrically connected to the second connection end F, and insulation between the first electrode 92a and the second electrode 92b is provided. The heating assembly 90 can prevent a problem in which the heating element 91 is detached from the substrate and becomes ineffective when subjected to high-temperature heat generation, so that the reliability of the heating assembly 90 is greatly improved.

Description

Heating assembly and aerosol forming device

The present invention relates to the technical field of heated non-combustion smoking equipment, and more particularly to heating assemblies and aerosol forming devices.

BACKGROUND OF THE INVENTION E-cigarettes are a substitute for cigarettes, and are receiving more and more attention and love from people due to advantages such as being safe, convenient, beneficial to health, and environmentally friendly. For example, there is a heated non-burning electronic cigarette, which is also called a heated non-burning aerosol forming device.

In conventional heated non-combustible aerosol forming devices, the heating method is usually tubular peripheral heating or central built-in heating. Tubular ambient heating refers to a method in which a heating tube surrounds the outside of an aerosol-forming substrate (eg, tobacco) and heats the aerosol-forming substrate. Central built-in heating refers to a method of heating the aerosol-forming substrate by inserting a heating assembly into the aerosol-forming substrate. Here, the heating assembly is widely used because of its simple manufacturing and convenient features. Current heating assemblies are mainly made of ceramics or insulated metal substrates. Then, a resistive heating circuit is printed or film-coated on the substrate, subjected to high-temperature treatment, and then the resistive heating circuit is fixed on the substrate to form.

A resistive heating circuit on a conventional heating assembly is a one-layer thin film that is printed or film-coated on a substrate at a later stage. Therefore, in the process of inserting the heating assembly into the aerosol-forming substrate several times, the resistance heating circuit is easily detached from the substrate when it is heated at a high temperature due to bending deformation of the substrate, resulting in poor stability. In addition, during the heating process, the resistance heating circuit is in contact only with the aerosol-forming substrate on one side of the substrate where the resistance heating circuit is installed, and does not come into contact with the aerosol-forming substrate on the back side of the substrate. Accordingly, the uniformity of heating to the aerosol-forming substrate is relatively poor.

The present application provides a heating assembly and an aerosol forming device. The heating assembly can solve the problem that the resistance heating circuit on the conventional heating assembly is easily detached from the substrate during high temperature heating, resulting in poor stability and poor heating uniformity of the aerosol-forming substrate of the electric resistance heating circuit.

In order to solve the above technical problem, the technical solution adopted in the present application is to provide a heating assembly. The heating assembly includes a heating element, a first electrode and a second electrode. Here, the heating element is used to insert and heat the aerosol-forming substrate. The heating element has a first connection end and a second connection end opposite to the first connection end. The first electrode is positioned at the first connection end of the heating element and electrically connected to the first connection end. One end of the second electrode is electrically connected to the second connection end, and insulation is installed between the first electrode and the second electrode.

To solve the above technical problem, another technical solution adopted by the present invention is to provide an aerosol forming device. The aerosol-forming device includes a housing and a heating assembly and a power supply assembly installed within the housing. Here, the power assembly is connected to the heating assembly and is used to supply power to the heating assembly. The heating assembly is the aforementioned heating assembly.

The heating assembly provided in the present application is inserted into the aerosol-forming substrate by installing a heating element, and then heats the aerosol-forming substrate through the heating element. The heating element can be directly and independently inserted into the aerosol-forming substrate, compared to resistance heating circuits formed by silk screen printing or film coating on a conventional substrate. In addition, when a high-temperature heat is generated, the heating element is detached from the substrate and becomes ineffective, so the stability of the heating assembly is greatly improved. In addition, a first electrode and a second electrode insulated from the first electrode are installed, the first electrode is installed at the first connection end of the heating element to electrically connect to the first connection end, and one end of the second electrode is connected to the second connection end. connect electrically Through this, a current loop is formed between the first connection end and the second connection end of the heating element. Therefore, it not only avoids the short-circuiting problem, but also makes the processing process simpler and effectively improves the strength of the heating assembly.

1A is a structural diagram of a heating assembly according to a first embodiment of the present application.
FIG. 1B is a schematic diagram of a heating assembly according to an embodiment of the present application being inserted into an aerosol-forming substrate.
2 is an exploded view of the structure shown in FIG. 1A according to a specific embodiment of the present application.
3 is an exploded view of the structure shown in FIG. 1A according to another specific embodiment of the present application.
4 is a cross-sectional view of heating elements installed in parallel according to an embodiment of the present application.
5 is a cross-sectional view of heating elements installed in parallel according to another embodiment of the present application.
6 is a structural diagram of a heating assembly according to a second embodiment of the present application.
7 is an exploded view of the structure shown in FIG. 6 according to a specific embodiment of the present application.
8 is a structural diagram of a heating assembly in which a protective layer covers the entire heating rod surface according to an embodiment of the present application.
9 is a structural diagram of an aerosol-forming device according to an embodiment of the present application.
10 is a front view after assembling a mounting sheet and a heating assembly according to an embodiment of the present application.

The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The described embodiments are only some rather than all of the present application. All other embodiments obtained by a person skilled in the art without creative work based on the embodiments of the present application fall within the protection scope of the present application.

As used herein, the terms "first", "second", and "third" are used for descriptive purposes only. It is not to be construed as implying or implying the relative importance or implying the quantity of technical features indicated. Here, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the above features. In the specification of this application, "plurality" means at least two, such as two, three, etc., unless specifically limited otherwise. In the embodiment of the present application, all directional signs (for example, up, down, left, right, front, back, etc.) represent the relative positional relationship between each member in a specific posture (as shown in the accompanying drawings), movement situation, etc. It is only for interpretation. When the specific posture is changed, the directional display is also changed correspondingly. Also, "comprise" and "comprise" and any variations thereof are intended to include a non-exclusive inclusion. For example, a process, method, system, product or equipment comprising a series of steps or units is not limited to the listed steps or units. It may optionally further include steps or units not listed, or may optionally further include other steps or units specific to such process, method, product, or equipment.

Reference herein to “an embodiment” means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the present application. Where the terms appear in various places in the specification, they are not necessarily referring to the same embodiment, nor are they referring to separate or alternative embodiments that are mutually exclusive of other embodiments. Those skilled in the art understand that the embodiments described herein, both explicitly and implicitly, may be combined with other embodiments.

Hereinafter, the present application will be described in detail with reference to the accompanying drawings and embodiments.

Referring to FIGS. 1A to 2 , FIG. 1A is a structural diagram of a heating assembly according to a first embodiment of the present application. FIG. 1B is a schematic diagram of a heating assembly according to an embodiment of the present application being inserted into an aerosol-forming substrate. 2 is an exploded view of the structure shown in FIG. 1A according to a specific embodiment of the present application. In this embodiment, a heating assembly 90 is provided. The heating assembly 90 is specifically used to insert and heat the aerosol-forming substrate 98. For example, in one specific embodiment, the heat generating assembly 90 is specifically inserted into the tobacco and used to heat the tobacco. All of the following examples have been described using this case as an example. It is to be understood that in this embodiment the aerosol-forming substrate 98 may specifically be tobacco or non-tobacco plant leaves or flower debris. Here, a schematic diagram in which the heating assembly 90 is inserted into the aerosol-forming substrate 98 may refer to FIG. 1B.

Specifically, the heating assembly 90 includes a heating element 91, a first electrode 92a, and a second electrode 92b.

Here, the heating element 91 is used to insert and heat the aerosol-forming substrate 98. The heating element 91 can be directly and independently inserted into the aerosol-forming substrate 98, compared to resistance heating circuits formed by silk screen printing or film coating on a conventional substrate. In addition, the stability of the heating assembly 90 is greatly improved because the problem of the heating element 91 being detached from the board and becoming ineffective when undergoing high-temperature heating does not occur. Specifically, the heating element 91 includes a first connection end (E) and a second connection end (F) facing the first connection end (E). In the process of inserting the heating element 91 into the tobacco, the second connecting end F of the heating element 91 is first inserted into the tobacco. Therefore, to facilitate insertion of the heating element 91 into the tobacco, the second connection end F of the heating element 91 may be specifically installed as a tip. That is, the tip portion D is formed in a triangular structure. An included angle formed by two adjacent sides of the tip is specifically 45 degrees to 90 degrees, for example, 60 degrees. In this application, the first connection end (E) and the second connection end (F) can be understood as including a region located in a certain area occupied by the corresponding end, rather than an end point or a cross section, respectively. Specifically, the first electrode 92a and the second electrode 92b are specifically installed (positioned) at the first connection end E of the heating element 91, and the first electrode 92a is of the heating element 91. It is electrically connected to the first connection end (E). The second electrode 92b is installed to be insulated from the first connection end E of the heating element 91 to prevent a short circuit from occurring. In addition, the second electrode 92b extends from the first connection end E to the second connection end F of the heating element 91 and is electrically connected to the second connection end F. Accordingly, a current loop is formed between the first connection end (E) and the second connection end (F) of the heating element 91 . This not only simplifies the processing process, but also effectively improves the overall strength of the heating assembly 90 . In addition, adhesion to tobacco during use and adhesion to tobacco oil after atomization is reduced.

Specifically, the shape and dimensions of the heating element 91 are not limited and can be designed as needed. In one specific embodiment, the heating element 91 is a strip shape. For example, it is rectangular and one end of the rectangle forms a tip.

Specifically, referring to FIG. 1A , the heating element 91 includes a first heating region A and a second heating region B connected to the first heating region A. Here, the first heating region (A) is a main atomization region that is inserted into the aerosol-forming substrate 98 to perform heating. Above it, the atomization temperature is concentrated between 280 ° C and 350 ° C, and it occupies more than 75% of the area of the atomization region. The second heating region B is a main matching section of the heating element 91 and has a temperature of 150° C. or less. Specifically, the ratio between the heating temperature of the first heating region (A) and the heating temperature of the second heating region (B) of the heating element 91 may be greater than 2. In a specific embodiment, the first electrode 92a is specifically installed in the second heating region (B) of the heating element 91 to lower the atomization temperature of the ceramic heating element 91 located in the second heating region (B). let it The first connection end E of the heating element 91 is located at a location where the second heating region B of the heating element 91 is located. The second connection end F is located at a position where the first heating region A of the heating element 91 is located.

In a specific embodiment, in the heating element 91, the resistivity of the material of the portion located in the second heating region (B) is smaller than the resistivity of the material of the portion located in the first heating region (A) of the heating element 91. Therefore, the temperature of the first heating region (A) of the heating element 91 is higher than the temperature of the second heating region (B). At the same time, by providing materials of different resistivities in different heating regions, the temperature of the different heating regions is controlled through the difference in resistivity. Specifically, the main components of the ceramic material of the portion located in the first heating region (A) of the heating element 91 and the portion located in the second heating region (B) of the heating element 91 are basically the same and are integrally molded. However, the portion of the heating element 91 located in the first heating region (A) and the portion located in the second heating region (B) of the heating element 91 have different ratios of ceramic materials or different components. Therefore, the resistivity of the portion located in the first heating region (A) of the heating element 91 and the portion located in the second heating region (B) of the heating element 91 are different. In the prior art, metal films formed by adopting different conductive materials are spliced into the two heating regions, for example, aluminum film and gold film are spliced together. However, since the present application does not need to connect, it is possible to effectively prevent a problem in which the conductors of the first heating region A and the second heating region B of the heating element 91 are disconnected.

In a specific embodiment, the first heating region (A) of the large portion of the first heating region (A) and the second heating region (B) of the heating element 91 is inserted into the aerosol-forming substrate 98, and the small portion The first heating region (A) and the second heating region (B) of stay on the outer surface of the aerosol-forming substrate (98). Alternatively, all of the first heating region (A) is inserted into the aerosol-forming substrate 98, and the second heating region (B) stays on the outer surface of the aerosol-forming substrate 98. Alternatively, the entire first heating region (A) is inserted into the aerosol-forming substrate 98, the second heating region (B) of a small portion is also inserted into the aerosol-forming substrate 98, and the second heating region (B) of a large portion is inserted into the aerosol-forming substrate 98. The silver stays on the outer surface of the aerosol-forming substrate 98 .

The heating element 91 described above may be specifically a self-supporting structure. That is, the heating element 91 may exist independently without being attached to another carrier. The heating element 91 of the self-supporting structure effectively prevents the problem of being detached from the board when subjected to high-temperature heat generation, compared to a resistance heating circuit formed by silk screen printing or film coating on a conventional board, so that the heating assembly 90 Stability can be greatly improved. In addition, since the heating element 91 has a self-supporting structure, there is no need to match it to the substrate. The two opposing surfaces of the heating element 91 can both be in direct contact with the tobacco, so that not only the energy utilization rate is high, but also the heating of the tobacco is relatively uniform and the predetermined temperature field boundary is clear. In particular, low-pressure operation facilitates immediate control and design.

Here, the material of the heating element 91 may be specifically conductive ceramic. Compared to the conventional metal material, the heating element 91 made of ceramic material has high conduction efficiency and a relatively uniform temperature by heating. In addition, the output of the heating element 91 made of the ceramic can be adjusted and designed between 3W and 4W, the conductivity can reach 1 * 10 ^-4 Ω to 1 * 10 ^-6 Ω, and the bending strength is greater than 40 MPa large, fire resistance can be higher than 1200 ℃. At the same time, the heating element 91 made of the ceramic has characteristics of an operating voltage in the entire process. Specifically, the heating element 91 made of the ceramic includes a main component and a crystal component. Here, the main component may be one or more of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon, and titanium. The crystal component may be one or more of lanthanum manganate, lanthanum strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide and yttrium oxide. In another embodiment, the heating element 91 may be made of a metal alloy or a ceramic alloy made of an iron silicon alloy or an iron silicon aluminum alloy.

Specifically, since the heating element 91 made of ceramic has a material electromagnetic heating wavelength of a mid-infrared wavelength, it helps to atomize tobacco oil in the aerosol-forming substrate and improve the taste. In addition, the crystalline structure of the ceramic heating element 91 is a high-temperature stable oxide ceramic. Oxide ceramics have relatively excellent fatigue resistance, relatively high strength, and relatively high density, effectively preventing harmful heavy metal volatilization and dust problems, and greatly improving the service life of the heating element 91 .

In the above, by adopting the ceramic sheet heating element 91, the highest temperature hot spot area can be reduced, the risk of fatigue cracking and fatigue resistance increase can be eliminated, and the consistency is relatively good. In addition, due to the high strength of the ceramic heating material and the smoothness due to the microcrystalline structure, the surface of the heating element 91 is relatively clean and not easily adhered. In addition, it can be understood that the ceramic heating element 91 is manufactured by a ceramic production process, and the process is relatively simple, easy to control, and relatively low in cost, which is helpful for industrial production and improving economic efficiency. In addition, the above-described conductive ceramic may be a material having TCR characteristics. That is, since the temperature and the resistance value show a corresponding relationship, the temperature of the heating element 91 can be controlled by obtaining the temperature value through the detection of the resistance value in the process of use.

Here, the first electrode 92a and the second electrode 92b are installed on the surface of the heating element 91 by a coating method, and the bonding force between the first electrode 92a and the second electrode 92b and the heating element 91 can improve Accordingly, connection stability between the electrode lead 95 connected on the first electrode 92a and the second electrode 92b and the heating element 91 is improved. It can be appreciated that ceramics have a microporous structure. The microporous structure of the ceramic may still make the bonding force between the formed first electrode 92a and the second electrode 92b and the heating element 91 relatively strong when the coating thickness is relatively thick. Accordingly, bonding force between the first electrode 92a and the second electrode 92b and the heating element 91 is greatly improved. Specifically, silver paste may be selected as the coating material described above. It can be understood that the first electrode 92a and at least a part of the second electrode 92b may be formed through a method of depositing a metal film. For example, metal materials such as gold, platinum, and copper having a resistivity higher than 1*10 ^-6 Ω are deposited.

In one embodiment, referring to FIGS. 2 and 3 , where FIG. 3 is an exploded view of the structure shown in FIG. 1A according to another specific embodiment of the present application. The heating element 91 is plate-shaped and may include a body portion C and a tip portion D connected to one end of the body portion C. Here, the second connection end (F) of the heating element 91 is the tip part (D), and the first connection end (E) of the heating element 92 is one end far from the tip part (D) of the body part (C). One end far from the second connection end (F) of the second electrode 92b is installed at the first connection end (E) of the heating element 92 . Here, the main body portion C is specifically rectangular. The tip portion D may be specifically triangular, arc-shaped or isosceles trapezoidal.

Specifically, the heating element 91 may be a long strip-shaped heating plate.

In a specific embodiment, referring to FIG. 2 , the first electrode 92a and the second electrode 92b are installed opposite to each other on both sides of the heating plate. Specifically, the first electrode 92a is coated on the second surface N of the heating plate and electrically connected to the first connection end E of the heating plate. An insulating layer 93 is installed on the first surface M of the heating plate. The insulating layer 93 extends from the first connection end (E) to a position close to the second connection end (F) of the heating plate. In addition, the first surface M of the heating element 91 is exposed to the insulating layer 93 at the second connection end F. The second electrode 92b is specifically installed on a surface far from the heating plate of the insulating layer 93 and extends toward the second connection end F of the heating element 91 . In addition, a part of the second electrode 92b extends outside the insulating layer 93 and is electrically connected to the second connection terminal F of the heating plate. The first electrode 92a may be coated on the first surface M, the second surface N, and the side surface of the heating plate to form an annular shape. Here, a portion of the first electrode 92a coated on the first surface M of the heating plate is installed between the insulating layer 93 and the heating plate.

Specifically, the first electrode 92a may have a rectangular structure, and the insulating layer 93 may have a T-shape. Specifically, the second electrode 92b includes a first coating portion 921 , a second coating portion 922 , and a third coating portion 923 . Here, the first coating portion 921 is coated on one surface of the insulating layer 93 far from the heating element 91 and installed to face the first electrode 92a. The shape of the first coating portion 921 is the same as that of the first electrode 92a. The second coating unit 922 is connected to the first coating unit 921 and is coated on one surface of the insulating layer 93 far from the heating element 91 and has the same shape as the extension of the insulating layer 93 . The third coating unit 923 is connected to the second coating unit 922, is directly coated on the first surface M of the heating element 91, and is electrically connected to the second connection end F of the heating element 91. do. In addition, the third coating portion 923 is perpendicular to the second coating portion 922, which may specifically represent a long strip-shaped rectangular structure. Specifically, the first coating portion 921, the second coating portion 922, and the third coating portion 923 are formed in a pore-shaped structure. It can be understood that the insulating layer 93 and the second electrode 92b are not limited to the above-described shapes and can be designed as needed. In a specific embodiment, the dimensions of the first coating portion 921 , the second coating portion 922 , and the third coating portion 923 are smaller than the dimensions of the insulating layer 93 at the corresponding location. That is, in the present application, both the first electrode 92a and the second electrode 92b are installed on the heating plate by a coating method. In another embodiment, it may be installed on the heating plate by film coating or silk screen printing such as sputtering.

In one embodiment, a protective layer 94 is further installed on at least one surface of the heating element 91 . The protective layer 94 covers at least the first electrode 92a and the second electrode 92b to prevent tobacco oil formed during tobacco heating from damaging the first electrode 92a and the second electrode 92b. do. Of course, the protective layer 94 may cover the entire surface of the heating element 91 (see FIG. 2). Through this, the first electrode 92a, the second electrode 92b, and the heating element 91 are protected, and at the same time, the entire heating element 91 has a smooth surface. Specifically, the protective layer 94 may specifically be a glass glaze layer.

In another specific embodiment, referring to FIG. 3 , FIG. 3 is an exploded view of the structure shown in FIG. 1A according to another specific embodiment of the present application. The difference from the above-described specific first embodiment is that the first electrode 92a and the second electrode 92b are installed on the same side of the heating element 91. Specifically, the first electrode 92a is coated on the first surface M of the heating element 91 and electrically connected to the first connection end E of the heating plate. Specifically, an insulating layer 93 is provided on a surface far from the heating plate of the first electrode 92a. The insulating layer 93 covers the first electrode 92a and extends from the first connection end E of the heating plate to a position close to the second connection end F. The second electrode 92b is specifically installed on a surface far from the first electrode 92a of the insulating layer 93 and extends toward the second connection end F of the heating element 91 . A part of the second electrode 92b extends outside the insulating layer 93 and is electrically connected to the second connection terminal F of the heating plate.

Specifically, the first electrode 92a may have a rectangular structure, and the insulating layer 93 may have a T-shape. Specifically, the portion of the insulating layer 93 covering the first electrode 92a has the same shape as the first electrode 92a and is slightly larger than or slightly larger than the first electrode 92a. equal to the dimensions The shape and size of the insulating layer 93 covering the first electrode 92a are not limited. It is only necessary to insulate the first electrode 92a and the second electrode 92b. For example, the insulating layer 93 covers the entire first electrode 92a, or the insulating layer 93 partially covers the first electrode 92a, but the size of the insulating layer 93 is the second electrode 92b. ) is greater than the dimension of

In a specific embodiment, the second surface N of the heating element 91 may be re-installed with the first electrode 92a at a position facing the first electrode 92a, or opposite to the second electrode 92b. The second electrode 92b may be installed again through the insulating layer 93 at the position. That is, the number of the first electrode 92a and the second electrode 92b is two, and the two surfaces of the conductive component of the conductive ceramic adjacent to the conductive ceramic can have a relatively short current path, so that the heating element 91 ) makes the temperature field of the two surfaces more uniform.

The heating assembly 90 provided in this embodiment is inserted into the aerosol-forming substrate 98 by installing a heating element 91 and then heats the aerosol-forming substrate 98 through the heating element 91. The heating element 91 can be directly and independently inserted into the aerosol-forming substrate 98, compared to resistance heating circuits formed by silk screen printing or film coating on a conventional substrate. In addition, the stability of the heating assembly 90 is greatly improved because the problem of the heating element 91 being detached from the board and becoming ineffective when undergoing high-temperature heating does not occur. At the same time, by installing the heating element 91 in a plate shape, the contact area between the aerosol-forming substrate 98 and the heating element 91 is effectively increased, thereby improving energy utilization and heating efficiency. In addition, a first electrode 92a and a second electrode 92b insulated from the first electrode 92a are installed, and the first electrode 92a is installed at the first connection end E of the heating element 91 to 1 is electrically connected to the connection end (E), and one end of the second electrode 92b is electrically connected to the second connection end (F). Through this, a current loop is formed between the first connection end (E) and the second connection end (F) of the heating element 91 . Accordingly, short-circuit problems are prevented, the processing process is simpler, and the strength of the heating assembly 90 is effectively improved.

Of course, in another embodiment, referring to FIGS. 4 and 5, FIG. 4 is a cross-sectional view of heating elements installed in parallel according to an embodiment of the present application. 5 is a cross-sectional view of heating elements installed in parallel according to another embodiment of the present application. The heating assembly 90 includes at least two heating elements 91, and the at least two heating elements 91 are installed in parallel. In a specific embodiment, the number of heating elements 91 may be specifically two. The two heating elements 91 are installed facing each other, and an insulating layer 93 is installed between them.

In a specific embodiment, referring to FIG. 4 , first electrodes 92a are installed on both opposing surfaces of the two heating elements 91 . In addition, the first electrode 92a is installed at the first connection end E of the two heating elements 91 . In the above embodiment, the second electrode 92b is installed on the insulating layer 93 and extends from the first connection end E of the heating element 91 to a position close to the second connection end F, , are electrically connected to the second connection end F of the two heating elements 91, respectively. Therefore, a current loop is formed between the two heating elements 91 between the first electrode 92a and the second electrode 92b, which indicates a state in which they are installed in parallel.

In another specific embodiment, referring to FIG. 5 , the first electrode 92a is installed at the position of the first connection end E corresponding to the heating element 91 of the insulating layer 93, and two heating elements are installed. It is electrically connected to the first connection end (E) of (91). In the above embodiment, the second connection ends (F) of the two heating elements 91 are respectively connected to the corresponding second electrodes 92b, so that the two heating elements 91 are connected to the first electrodes 92a and 92b respectively. It is made to be installed in parallel through the second electrode 92b corresponding to . Specifically, the insulating layer 93 is coated on both surfaces of one side of the two heating elements 91 facing each other. The second electrode 92b on each heating element 91 is provided on one surface of the insulating layer 93 far from the heating element 91 . In addition, it extends from the first connection end (E) of the heating element 91 to a position close to the second connection end (F), and is connected to the second connection end (F) of the heating element 91 .

In another embodiment, referring to FIG. 6 , FIG. 6 is a structural diagram of a heating assembly according to a second embodiment of the present application. The difference from the above-described first embodiment is that the heating element 91 is specifically columnar and may include a body portion C and a tip portion D connected to one end of the body portion C. The second connection end (F) of the heating element 91 is the tip part (D), and the first connection end (E) of the heating element 91 is one end far from the tip part (D) of the body part (C). In a specific embodiment, the main body portion (C) may be a cylindrical shape, and the tip portion (D) may be a conical or truncated cone shape. Specifically, the heating element 91 may be a heating rod as shown in FIG. 6, and since the second connection end F of the heating rod is a tip, it is easy to insert into the aerosol-forming substrate 98.

Specifically, referring to FIG. 7 , FIG. 7 is an exploded view of the structure shown in FIG. 6 according to a specific embodiment of the present application. The first electrode 92a is installed on at least a portion of the surface of the first connection end E of the heating rod. An insulating layer 93 is provided on the outer wall of the body portion C of the heating rod. The insulating layer 93 extends from the first connection end (E) of the heating rod to a position close to the second connection end (F), and the position close to the tip part (D) of the body part (C) is connected to the insulating layer (93). Expose. The second electrode 92b is provided on a surface of the insulating layer 93 far from the heating rod. A part of the second electrode 92b extends outside the insulating layer 93 and is installed to contact the second connection end F of the heating rod. That is, a part of the second electrode 92b extends outside the insulating layer 93, and the portion exposed to the insulating layer 93 at a position close to the tip part D of the main body part C of the heating element 91 is removed. 2 It is installed to be in contact with the connection end (F).

Also, in a specific embodiment, the first electrode 92a is installed to surround the outer wall of the heating rod, which specifically represents an arc-shaped structure. In the above embodiment, the insulating layer 93 wraps around the circumferential direction of the heating rod. In addition, a notch is provided at a corresponding position where the first electrode 92a is installed on the insulating layer 93 and the heating rod. Since at least a portion of the first electrode 92a is exposed through the corresponding notch, it is easy to connect the electrode lead 95. In a specific embodiment, the second electrode 92b may be installed such that a portion extending outside the insulating layer 93 surrounds the body portion C of the heating rod. Specifically, this represents an annular structure, so that the second electrode 92b and the second connection end F of the heating rod can be effectively connected. Of course, in another embodiment, the first electrode 92a may further include a bottom surface close to the first connection end E extending to the heating rod, thereby improving overall bonding strength and electrical reliability.

In another specific embodiment, the first electrode 92a is installed to surround the outer wall of the heating rod and may have an annular structure. In detail, the insulating layer 93 may be installed to completely cover the first electrode 92a and to surround the outer wall of the heating rod one turn. The present embodiment does not limit this, as long as it is possible to prevent a short circuit from occurring between the first electrode 92a and the second electrode 92b through the insulating layer 93 .

In a specific embodiment, a protective layer 94 is further coated on at least one surface of the heating rod. The protective layer 94 covers at least the first electrode 92a and the second electrode 92b to prevent damage to the first electrode 92a and the second electrode 92b by tobacco oil formed during tobacco heating. do. Of course, in another embodiment, referring to FIG. 8 , FIG. 8 is a structural diagram of a heating assembly in which a protective layer covers the entire heating rod surface according to an embodiment of the present application. The protective layer 94 covers the entire surface of the heating rod to protect the first electrode 92a, the second electrode 92b and the heating rod, and at the same time, the entire heating rod may have a smooth surface. Specifically, the protective layer 94 may specifically be a glass glaze layer.

In a specific embodiment, the resistance of the heating rod may be 0.3 Ω to 1 Ω, for example, 0.6 Ω. The resistivity may be 1*10 ^-4 Ω to 4*10 ^-4 Ω, specifically 2*10 ^-4 Ω. The used power may be 2W to 5W, and may be specifically 3.5W. Specifically, referring to FIG. 8 , the total length L41 of the heating rod may be 18 mm to 20 mm. It may have a length (L42) of 14 mm to 15 mm for insertion into the tobacco. The diameter (φ) of the heating rod may be specifically 2.0 mm to 3.0 mm, for example, 3 mm.

In a specific processing process, a silver electrode is first coated on the heating rod to form an electrode, and then an insulating medium layer is coated at another location on the surface of the heating rod. Then, the electrode lead 95 is welded to prevent the electrode lead 95 from contacting the heating rod.

Specifically, when the above-described heating element 91 is installed in a columnar shape, it is easy to insert the heating element 91 into the tobacco, and the columnar heating element 91 is easy to process, so that the processing difficulty factor is effectively lowered.

The heating assembly 90 provided in the embodiment of the present application may directly adopt a heating plate (or heating rod) made of a conductive ceramic material that is self-supported in its heating form. In addition, the heating element 91 may be arranged in a single or multiple series-parallel form or multiple parallel form depending on the electrode arrangement position and resistance value requirements. At the same time, the heating element 91 adopts a ceramic material. Compared to a resistance heating circuit formed by coating a metal heating material on a conventional substrate, both sides can be in contact with the tobacco at the same time to heat the tobacco, and the heating is more uniform and It is stable.

Referring to FIG. 9, FIG. 9 is a structural diagram of an aerosol-forming device according to an embodiment of the present application. In this embodiment, an aerosol forming device 900 is provided. The aerosol forming device 900 includes a housing 901 and a heating assembly 90 installed in the housing 901, a mounting seat 96, and a power supply assembly 97.

Here, the heating assembly 90 may be the heating assembly 90 provided in any one of the embodiments described above. Its specific structure and function can refer to the description of the above-mentioned related content, so it will not be repeatedly described here. Specifically, the heating assembly 90 is installed on the mounting sheet 96 and is fixedly mounted on the inner wall surface of the housing 901 through the mounting sheet 96 . The power assembly 97 is connected to the heating assembly 90 and is used to supply power to the heating assembly 90 . In one embodiment, the power supply assembly 97 may specifically be a rechargeable lithium ion battery.

Specifically, a specific structure in which the heating assembly 90 is installed on the mounting sheet 96 may refer to FIGS. 1A and 8 described above. Specifically, referring to FIG. 8 , the mounting sheet 96 includes a mounting body 961 and mounting holes 962 . The heating assembly 90 is specifically inserted into the mounting hole 962 of the mounting sheet 96 and fixed with the mounting sheet 96 . Specifically, the second heating region B of the heating assembly 90 is inserted into the mounting hole 962 of the mounting sheet 96 and fixed to the mounting sheet 96 . Further, after being inserted into the aerosol-forming substrate 98, the bottom end of the aerosol-forming substrate 98 abuts against the upper surface of the mounting sheet 96. Specifically, avoidance grooves are installed on the side walls of the mounting holes 962 . The electrode lead 95 specifically extends into the mounting sheet 96 through the avoidance groove and is connected to the electrode on the heating element 91 . In addition, at least two engaging connecting parts 963 are further installed on the mounting body 961 . The mounting sheet 96 is specifically fixed to the housing 901 of the aerosol-forming device 900 through the hooking portion 963.

Specifically, referring to FIG. 10 , FIG. 10 is a front view after assembling a mounting sheet and a heating assembly according to an embodiment of the present application. The heating element 91 is engaged in the mounting hole 962 of the mounting sheet 96 . In a specific embodiment, the heating element 91 is provided with a first locking structure 964 on a surface of a portion inserted into the mounting sheet 96 . A second locking structure 965 is provided at a position corresponding to the first locking structure 964 in the mounting hole 962 of the mounting sheet 96 . The mounting sheet 96 and the heating element 91 are fixed through the engagement of the first engagement fixing structure 964 and the second engagement fixing structure 965 to improve the connection stability of the two. Here, the first locking structure 964 may be a plurality of protrusions (or recesses), and the second locking structure 965 is a recess (or recess) that matches the first locking structure 964. protrusion) can be.

Referring to FIG. 1A , an extension groove 966 communicating with the mounting hole 962 may be further installed on one side of the mounting body 961 . The extension groove 966 may be specifically installed on one surface far from the second connection end F of the heating element 91 . In addition, the extension groove 966 matches the shape of the part used to be inserted into the mounting seat 96 of the heating assembly 90. The portion of the heating assembly 90 inserted into the mounting sheet 96 through the extension groove 966 is strengthened to prevent breakage. In a specific embodiment, two extension grooves 966 are installed on the mounting sheet 96, and the two extension grooves 966 intersect and are vertically installed.

Specifically, the material of the mounting sheet 96 may be an organic or inorganic material having a melting point of 160 degrees or higher. For example, it may be a PEEK material. The mounting sheet 96 may be specifically adhesively fixed to the heating assembly 90 by an adhesive. The adhesive may be a high temperature resistant glue.

In the aerosol forming device 900 provided by the present invention, the heating assembly 90 is installed, the heating assembly 90 includes the heating element 91, and the heating element 91 is inserted into the aerosol forming substrate 98. ) to heat the aerosol-forming substrate 98. The heating element 91 can be directly and independently inserted into the aerosol-forming substrate 98, compared to resistance heating circuits formed by silk screen printing or film coating on a conventional substrate. In addition, the stability of the heating assembly 90 is greatly improved because the problem of the heating element 91 being detached from the board and becoming ineffective when undergoing high-temperature heating does not occur. At the same time, a first electrode 92a and a second electrode 92b insulated from the first electrode 92a are installed, and the first electrode 92a is installed at the first connection end E of the heating element 91 to 1 is electrically connected to the connection end (E), and one end of the second electrode 92b is electrically connected to the second connection end (F). Through this, a current loop is formed between the first connection end (E) and the second connection end (F) of the heating element 91 . Accordingly, the short-circuit problem is prevented, the process is simpler, and the strength of the heating assembly 90 is further increased.

The above content is merely an implementation method of the present application, and does not limit the patent scope of the present application. Equivalent structural or equivalent process changes made based on the contents of the specification and accompanying drawings of this application, or direct or indirect application in other related technical fields, are all equally included in the patent protection scope of this application.

Claims (18)

In the heating assembly,
a heating element used to insert and heat the aerosol-forming substrate, and having a first connection end and a second connection end opposite to the first connection end;
a first electrode positioned at a first connection end of the heating element and electrically connected to the first connection end; and
A heating assembly comprising a second electrode having one end electrically connected to the second connection end, wherein an insulation is installed between the first electrode and the second electrode. According to claim 1,
A heating assembly in which the other end of the second electrode extends toward the first connecting end of the heating element. According to claim 2,
The heating element is plate-shaped and includes a main body and a tip connected to one end of the main body, the second connection end of the heating element is the tip, and the first connection end of the heating element is an end far from the tip of the main body. A heating assembly in which an end far from the second connection end of the second electrode is installed at the first connection end of the heating element. According to claim 3,
The first electrode is installed on the first surface of the heating element,
An insulating layer is provided on a second surface of the heating element, the insulating layer extends from the first connection end of the heating element to a position of the second connection end, and the heating element is disposed on the second surface of the second connection end. exposed to the insulating layer, the second electrode is installed on a surface of the insulating layer far from the heating element, and a part of the second electrode extends outside the insulating layer and is installed to contact the second connection end of the heating element, here wherein the first surface and the second surface are installed facing each other. According to claim 3,
The first electrode is installed on the first surface of the heating element,
An insulating layer is provided on a surface of the first electrode far from the heating element, the insulating layer extends from the first connection end of the heating element to a position of the second connection end, and the second electrode extends from the first connection end of the heating element to the second connection end. A heating assembly installed on a surface far from the first electrode, and a part of the second electrode extending outside the insulating layer to come into contact with the second connection end of the heating element. According to claim 4,
The first electrode has a rectangular structure, the second electrode has a pore-shaped structure, and the insulating layer has a T-shape. According to claim 3,
The heating assembly of claim 1 , wherein the body portion has a rectangular shape, and the tip portion has a triangular shape, an arc shape, or an isosceles trapezoidal shape. According to claim 1,
The heating element is pillar-shaped and includes a main body and a tip connected to one end of the main body, the second connection end of the heating element is the tip, and the first connection end of the heating element is a heating element that is an end far from the tip of the main body. assembly. According to claim 8,
The first electrode is installed on at least a portion of the surface of the first connection end of the heating element,
An insulating layer is installed on an outer wall of the main body of the heating element, the insulating layer extends from the first connecting end of the heating element to a position close to the second connecting end, and exposes a position close to the tip of the main body to the insulating layer. And, the second electrode is installed on a surface of the insulating layer far from the heating element, and a part of the second electrode extends outside the insulating layer so that a position close to the tip part of the main body of the heating element is exposed to the insulating layer A heating assembly installed to be in contact with the second connection end of the part. According to claim 9,
The insulating layer is installed to surround an outer wall of the heating element and has a notch at a position corresponding to the first electrode to expose at least a portion of the first electrode. According to claim 9,
The first electrode is installed to surround the heating element, and the second electrode is installed to surround a main body of the heating element with a portion extending outside the insulating layer. According to claim 1,
The heating assembly further comprises a protective layer coated on a surface of the heating element to cover the first electrode and the second electrode. According to claim 12,
The protective layer is a glass glaze layer and covers the entire surface of the heating element. According to claim 8,
The body part has a cylindrical shape, and the tip part has a conical or truncated cone shape. According to claim 1,
The heating element includes a first heating region and a second heating region, and a ratio of a heating temperature of the first heating region to a heating temperature of the second heating region is greater than 2. According to claim 1,
The material of the heating element is a conductive ceramic heating assembly. According to claim 16,
The heating element of the conductive ceramic includes a main component and a crystal component, the main component is at least one of manganese, strontium, lanthanum, tin, antimony, zinc, bismuth, silicon and titanium, and the crystal component is lanthanum manganate, lanthanum An exothermic assembly that is one or more of strontium manganate, tin oxide, zinc oxide, antimony oxide, bismuth oxide, silicon oxide and yttrium oxide. In the aerosol forming device,
It includes a housing, a heating assembly installed in the housing, and a power supply assembly, wherein the power supply assembly is connected to the heating assembly and is used to supply power to the heating assembly, and the heating assembly generates heat according to claim 1. An aerosol-forming device that is an assembly.

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