Heating element and aerosol generating device

Abstract

The utility model relates to the technical field of aerosol generation, in particular to a heating body and an aerosol generation device.The heating body comprises a heating base body and a heating circuit, the heating circuit extends along a curve and comprises a plurality of first heating parts, a plurality of second heating parts and a plurality of bent parts, the first heating parts and the second heating parts are sequentially and alternately arranged, and the bent parts are arranged on the first heating parts and the second heating parts. The bending parts are arranged between the adjacent first heating parts and second heating parts in a bending manner; the bending part is made of a low-resistivity material, and the first heating part is made of a high-resistivity material. The bending part is made of the low-resistivity material, and the second heating part is made of the high-resistivity material, so that current can smoothly pass through the bending part, heating of the bending part is avoided, the problem of current impact or heat concentration caused by different paths of the inner side and the outer side of the bending part is solved, the stability of the heating body can be improved, and the service life of the heating body is prolonged. The use effect of the aerosol generating device can be ensured, and the service life of the aerosol generating device is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol generation, and more particularly to a heating element and an aerosol generating device. BACKGROUND

[0002] The aerosol generating device can use the heat effect of an electronic heating element to bake and heat an aerosol generating substrate, so that the aerosol generating substrate can generate aerosol and other volatile substances without combustion. Some existing aerosol generating devices use a thick film printed heating element. In order to increase the heating area, the heating circuit on the heating element is usually arranged in a serpentine shape. However, too many bends can cause excessive heat concentration at the bending parts, resulting in excessively high temperature at the bending parts, uneven heating of the aerosol generating substrate, increased power output of the power supply assembly, and even damage to the heating element, which affects the service life of the aerosol generating device. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a heating element and an aerosol generating device, which can solve the problem of heat concentration at the bending parts, improve the stability of the heating element, and prolong the service life of the aerosol generating device.

[0004] The present application provides a heating element, comprising a heating base and a heating circuit arranged on the heating base.

[0005] The heating circuit extends along a curve and comprises a plurality of first heating parts, a plurality of second heating parts, and a plurality of bending parts. The first heating parts and the second heating parts are arranged alternately in sequence, and the bending parts are arranged in a bending manner between adjacent first heating parts and second heating parts.

[0006] The bending parts are made of a low resistivity material, and the first heating parts are made of a high resistivity material.

[0007] In some optional embodiments, the second heating part arranged between two adjacent bending parts is made of the low resistivity material.

[0008] In some optional embodiments, the second heating part is made of the high resistivity material.

[0009] In some optional embodiments, the low resistivity material includes silver or gold, and the high resistivity material includes silver-palladium alloy.

[0010] In some optional embodiments, the first heating part is a straight line structure extending in a first direction, the second heating part is a straight line structure extending in a second direction, and the first direction and the second direction are perpendicular to each other.

[0011] In some alternative embodiments, the extension lengths of at least two of the first heat-generating portions are different.

[0012] In some alternative embodiments, the widths of the first heat-generating portions and the second heat-generating portions are the same.

[0013] In some alternative embodiments, the bending directions of the bending portions at two ends of the same second heat-generating portion are perpendicular to each other.

[0014] In some alternative embodiments, the heating wire is provided in a plurality, and the plurality of heating wires are connected in parallel; the heating body further comprises a first electrode portion, a plurality of second electrode portions, and a connecting member, one end of each of the plurality of heating wires is connected to the first electrode portion through the connecting member, and the other end is connected to the second electrode portions one by one.

[0015] The application provides an aerosol-generating device, which comprises a power supply assembly and the heating body as described above, and the power supply assembly supplies power to the heating body.

[0016] According to the heating body in the embodiment, the heating body comprises a heating base and a heating wire arranged on the heating base, the heating wire extends along a curve and comprises a plurality of first heat-generating portions, a plurality of second heat-generating portions, and a plurality of bending portions, the first heat-generating portions and the second heat-generating portions are arranged alternately, and the bending portions are arranged between adjacent first heat-generating portions and second heat-generating portions; the bending portions are made of a low-resistivity material, and the first heat-generating portions are made of a high-resistivity material. Since the bending portions are made of a low-resistivity material and the second heat-generating portions are made of a high-resistivity material, the second heat-generating portions mainly serve as heat sources to generate heat after being powered on, and the bending portions mainly serve to connect the first heat-generating portions and the second heat-generating portions, so that the current can flow smoothly through the bending portions, avoiding the heating of the bending portions due to resistance, solving the problem of current impact or heat concentration caused by different paths on the inner side and the outer side of the bending portions, thereby improving the stability of the heating body, ensuring the use effect of the aerosol-generating device, and prolonging the service life of the aerosol-generating device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 4 is a structural cross-sectional view of the use state of the aerosol-generating device in an embodiment;

[0018] Figure 2 FIG. 5 is a structural schematic view of the heating body in an embodiment;

[0019] Figure 3 FIG. 6 is a structural schematic view of the heating body in another embodiment;

[0020] Figure 4 FIG. 7 is a structural schematic view of the heating element wound into a heating cylinder in an embodiment.

[0021] Wherein: 1, heating assembly; 11, heating body; 111, heating base; 112, heating circuit; 1121, first heating part; 1122, second heating part; 1123, bending part; 113, first electrode part; 114, second electrode part; 115, connecting piece; 2, shell assembly; 3, power supply assembly; A, aerosol generating substrate; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0022] The application will be described in further detail below with reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following embodiments, many details are described in order to provide a better understanding of the application. However, a person skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary for a person skilled in the art to describe these operations in detail according to the description in the specification and general technical knowledge in the art.

[0023] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that is obvious to a person skilled in the art. Therefore, the specification and drawings are only intended to clearly describe one embodiment, and do not mean that the composition and / or order is necessary.

[0024] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" and "coupling" in this application include direct and indirect connections (couplings) unless otherwise specified.

[0025] The application provides an aerosol generating device applied to heating an aerosol generating substrate A. The aerosol generating device can heat the aerosol generating substrate A to form an aerosol by using the principle of heating without combustion, for the user to use.

[0026] It should be noted that the term "aerosol" in the specification refers to a dispersion of solid or liquid particles in a gas. "Aerosol" as used herein can generally be used to refer to a substance that has been vaporized, atomized, in the form of a spray or jet, or otherwise converted from a solid or liquid form to an inhalable form containing suspended solid or liquid drug particles.

[0027] As used herein, the term "aerosol generating substrate A" refers to any suitable compound or mixture of compounds that facilitate aerosol formation (e.g. stable aerosol that is substantially resistant to thermal degradation at the operating temperature of the system) in use. Suitable aerosol generating substrates A are well known in the art and include, but are not limited to: polyhydric alcohols such as triethylene glycol, 1,3-butanediol and glycerol; esters of polyhydric alcohols such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or poly-carboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. The aerosol generating substrate A can include nicotine. The aerosol generating substrate A can include water. The aerosol generating substrate A can include glycerol (also known as glycerin) which has a higher boiling point than nicotine. The aerosol generating substrate A can include propylene glycol. The aerosol generating substrate A can include plant-based material. The aerosol generating substrate A can include homogenized plant-based material. The homogenized plant-based material can contain volatile compounds. These compounds can be released from the aerosol generating substrate A upon heating.

[0028] The aerosol generating device comprises a shell assembly 2, a power supply assembly 3 and a heating assembly 1. The shell assembly 2 is arranged to provide a containing space for the power supply assembly 3 and the heating assembly 1, and can also protect the power supply assembly 3 and the heating assembly 1, and facilitate the carrying and transportation of the aerosol generating device. The heating assembly 1 comprises a heating body 11. The power supply assembly 3 and the heating body 11 are electrically connected, and can supply power to the heating body 11 and control the working temperature or power of the heating body 11.

[0029] The shell assembly 2 and the power supply assembly 3 are prior art, and are not the focus of the protection scheme of the present application. Therefore, they will not be described in detail here. The heating body 11 in the heating assembly 1 will be described in detail below.

[0030] The heating body 11 comprises a heating cylinder, a heating film or a heating circuit, etc. The heating cylinder, the heating film or the heating circuit can generate heat to provide atomization heat for the aerosol generating substrate A after being powered on. The heating circuit is generally a curve structure formed on a structure that can conduct heat by printing, brushing or the like. The arrangement of the curve structure can increase the heating area, thereby improving the heating power to meet the temperature requirement of sufficient atomization of the aerosol generating substrate A. However, due to the multiple bending parts in the curve structure, based on the reason that the current takes the shortest path, the heating body is prone to damage or the heat of the heating body is concentrated at the bending part (especially the inner side of the bending part) due to current impact, which affects the use effect and service life of the aerosol generating device.

[0031] It should be noted that the inner side and the outer side of the bending part are arranged oppositely. The side towards which the bending part bends is the inner side, and the opposite side is the outer side.

[0032] It needs to be further explained that the current takes the shortest path should be specifically understood as the current tends to take the path with the smallest resistance, that is, in the circuit, when there are multiple possible current paths, the current will preferentially select those paths with smaller resistance (or impedance) to flow, because the resistance on these paths is the smallest, and the current flows more smoothly.

[0033] Based on the above principle, the application creatively reduces the resistance of the bending part, so that the current of the bending part can flow smoothly, to solve the problem of heat concentration in the bending part or current impact. The specific scheme is as follows.

[0034] Please refer to Figures 1 to 4 The application provides a heating body 11, which comprises a heating base body 111 and a heating circuit 112 arranged on the heating base body 111. The heating circuit 112 extends along a curve and comprises a plurality of first heating parts 1121, a plurality of second heating parts 1122 and a plurality of bending parts 1123. The first heating parts 1121 and the second heating parts 1122 are arranged alternately in sequence, and the bending parts 1123 are arranged in a bending manner between adjacent first heating parts 1121 and second heating parts 1122. The bending parts 1123 are made of a low-resistivity material, and the first heating parts 1121 are made of a high-resistivity material.

[0035] Since the bending parts 1123 are made of a low-resistivity material and the second heating parts 1122 are made of a high-resistivity material, the second heating parts 1122 mainly serve as heat sources to heat after being powered on, and the bending parts 1123 mainly serve as a connection between the first heating parts 1121 and the second heating parts 1122. The current can flow smoothly through the bending parts 1123, avoiding heating of the bending parts 1123 due to resistance, solving the problem of current impact or heat concentration on the inner side and the outer side of the bending parts 1123 due to different paths, thereby improving the stability of the heating body 11, ensuring the use effect of the aerosol generating device, and prolonging the service life of the aerosol generating device.

[0036] Please refer to Figure 2In some embodiments, since the two ends of the heating wire 112 can be composed of the first heating part 1121 or the second heating part 1122, in order to further effectively ensure the heating area on the basis of reducing the heat concentration and current impact at the bending part 1123, the second heating part 1122 arranged between two adjacent bending parts 1123 can be made of a low-resistivity material, and the second heating part 1122 at the end is made of a high-resistivity material as a heating source. In the figure, the second heating part 1122 made of a low-resistivity material is represented by a grid line filling, and the first heating part 1121 and the second heating part 1122 not filled with a pattern are made of a high-resistivity material. The second heating part 1122 between the two bending parts 1123 and the bending part 1123 are made of the same material and can be configured as an integral structure. After being powered on, the second heating part 1122 and the bending part 1123 only play the role of current guidance and will not cause heat concentration due to the existence of resistance. In this embodiment, since the second heating part 1122 and the bending part 1123 are made of the same material and have the same effect, the size of the second heating part 1122 can be minimized to enable the connection of the two bending parts 1123, so that the two first heating parts 1121 are arranged at intervals. This can not only meet the requirement of the heating area, but also reduce the size of the heating body 11, which is beneficial to the miniaturization design of the aerosol generating device.

[0037] Please refer to Figure 3 In other embodiments, the second heating part 1122 is made of a high-resistivity material, and only the bending part 1123 is made of a low-resistivity material. This can not only solve the problem of heat concentration and current impact, but also increase the overall heating area of the heating body 11. In the figure, the second heating part 1122 made of a low-resistivity material is represented by a grid line filling, and the first heating part 1121 and the second heating part 1122 not filled with a pattern are made of a high-resistivity material. The second heating part 1122 and the first heating part 1121 can be made of the same material. The second heating part 1122 not only serves the purpose of connecting the two bending parts 1123 to arrange the first heating parts 1121 at intervals, but also can heat as a heating source after being powered on, that is, the first heating part 1121 and the second heating part 1122 are connected in series through the bending part 1123. In this embodiment, in order to further increase the heating area, the size of the second heating part 1122 can be increased compared with the previous embodiment.

[0038] In some embodiments, the low-resistivity material includes but is not limited to silver or gold, and the low-resistivity material only serves the role of electrical conductivity. The high-resistivity material includes but is not limited to silver-palladium alloy, and the high-resistivity material can heat as a heating source after being powered on based on its high-resistance characteristic.

[0039] In some embodiments, the bending portion 1123, the first heating portion 1121 and the second heating portion 1122 can all be formed by a paste coating of the material from which they are made, for example, the bending portion 1123 can be formed by a silver paste coating. Of course, in other embodiments, the bending portion 1123, the first heating portion 1121 and the second heating portion 1122 can also be solid structures of a certain size made of the material from which they are made, which can be arranged on the heating base 111 by inlaying, pasting or the like.

[0040] In some embodiments, the heating base 111 is a rectangular structure having a longitudinal direction and a transverse direction perpendicular to each other, and can be wound around an axis into a heating cylinder structure, as shown in Figure 4 The heating wire 112 is arranged along the entire side of the heating cylinder, so that the circumference of the substance (for example, the aerosol generating substrate A) accommodated inside the heating cylinder can be uniformly heated.

[0041] In some embodiments, the first heating portion 1121 is a straight line structure extending in the first direction X, and the second heating portion 1122 is a straight line structure extending in the second direction Y, the first direction X and the second direction Y being perpendicular to each other, so that the heating sources are uniformly arranged along the longitudinal direction and the transverse direction of the heating base 111. When the heating base 111 is laid flat (which can also be understood as before being wound into a heating cylinder), the first direction X is parallel to the longitudinal direction, and the second direction Y is parallel to the transverse direction, the first heating portion 1121 extends in the first direction X, and the second heating portion 1122 extends in the second direction Y, so that a plurality of first heating portions 1121 are arranged at intervals along the second direction Y, thereby effectively ensuring that the heating body 11 can sufficiently heat the aerosol generating substrate A.

[0042] In use, the aerosol generating substrate A can be accommodated in the heating cylinder formed by winding the heating base 111, and the aerosol generating substrate A and the heating cylinder are coaxially arranged. In order to uniformly heat the aerosol generating substrate A in its axial direction, the extension length of the plurality of second heating portions 1122 in the second direction Y is the same, so that the spacing between the adjacent two first heating portions 1121 is the same.

[0043] In other embodiments, the heating base 111 is a planar structure, and does not undergo winding or other treatment, and the arrangement of the first heating portion 1121, the second heating portion 1122 and the bending portion 1123 can also increase the heating area and ensure uniform heating of the entire plane of the heating base 111.

[0044] In some embodiments, the extension lengths of at least two of the first heat-generating portions 1121 are different. For example, the first heat-generating portions 1121 are spaced apart along the second direction Y, and the two ends of the first heat-generating portion 1121 are connected by the bending portions 1123 to the second heat-generating portions 1122 extending along the second direction Y. The space enclosed by the first heat-generating portions 1121 and the second heat-generating portions 1122 can have a phenomenon of uneven heating of the aerosol generating substrate A due to heat concentration and excessively high temperature. The first heat-generating portion 1121 in the middle has a smaller extension length than the first heat-generating portions 1121 around it, which can solve this problem. The extension length can be adjusted according to the design of the entire heating circuit 112, and the heating area can be ensured while ensuring uniform heating.

[0045] In some embodiments, the widths of the first heat-generating portions 1121 and the second heat-generating portions 1122 are the same. Since the width of the heat-generating portion also affects its resistance, selecting the same material and the same width facilitates control of the heating power of the entire heating circuit 112, which helps to ensure uniform heating of the entire heating circuit 112.

[0046] It should be noted that the width described above refers to the dimension of the first heat-generating portion 1121 and the second heat-generating portion 1122 perpendicular to the extension direction thereof. For example, the width of the first heat-generating portion 1121 refers to the dimension along the second direction Y, and the width of the second heat-generating portion 1122 refers to the dimension along the first direction X.

[0047] In some embodiments, the bending directions of the bending portions 1123 at the two ends of the same second heat-generating portion 1122 (the direction of the line connecting the midpoint of the arc-shaped side of the bending portion 1123 to the center top point) are perpendicular to each other, so that the second heat-generating portion 1122 extends in the same direction from the end faces of the two bending portions 1123 that are close to each other and approaches them. The two bending portions 1123 and the second heat-generating portion 1122 approximately form a semicircular structure, so that the first heat-generating portions 1121 are arranged more concentratedly, which is conducive to improving the heating temperature of the heating body 11 to ensure that the aerosol generating substrate A can be heated to a sufficient temperature.

[0048] In some embodiments, the heating circuit 112 is provided in plurality, and the plurality of heating circuits 112 are connected in parallel. Through the parallel connection of the plurality of heating circuits 112, the single heating circuit 112 can be controlled individually and the plurality of heating circuits 112 can be controlled synchronously, so as to adjust the heating power of the aerosol generating device, so as to adapt to the use requirements of different aerosol generating substrates A for heating temperature or the requirements of different users for aerosol content. The heating body 11 further comprises a first electrode part 113, a plurality of second electrode parts 114 and a connecting part 115, and the first electrode part 113, the plurality of second electrode parts 114 and the connecting part 115 are also arranged on the heating base 111. One end of the plurality of heating circuits 112 is connected to the first electrode part 113 through the connecting part 115, and the other end is connected to the second electrode part 114 one by one. Through the arrangement of the plurality of second electrode parts 114, one or more second electrode parts 114 are selected to be in circuit communication with the power supply assembly 3, so as to control one or more heating circuits 112 to work. The first electrode part 113 and the second electrode part 114 are the positive electrode and the negative electrode in the circuit.

[0049] The function of the connecting part 115 is to realize the connection between the first heating part 1121 or the second heating part 1122 and the first electrode part 113 or the second electrode part 114. The connecting part 115 can be made of low resistivity material, and the current can flow smoothly at the connecting part 115, almost without generating heat.

[0050] Please refer to Figure 2 and Figure 3 , the two ends of the heating circuit 112 can be composed of the first heating part 1121 and the second heating part 1122 respectively, and the first heating part 1121 and the second heating part 1122 at the two ends can be directly connected to the first electrode part 113 or the second electrode part 114 through the connecting part 115, or can be directly connected to the first electrode part 113 or the second electrode part 114. When the second heating part 1122 is directly connected to the first electrode part 113 or the second electrode part 114, the second heating part 1122 can also be made of high resistivity material, as shown in Figure 3 .

[0051] Of course, in other embodiments, the other end of the plurality of heating circuits 112 can also be connected through the same connecting part 115 and connected to the same second electrode part 114. However, in this embodiment, the single heating circuit 112 cannot be controlled individually.

[0052] The above application uses specific examples to illustrate the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A heating element, characterized in that, Includes a heating substrate and heating circuitry disposed on the heating substrate; The heating circuit extends along a curve and includes multiple first heating parts, multiple second heating parts, and multiple bending parts. The first heating parts and the second heating parts are arranged alternately in sequence, and the bending parts are bent between adjacent first heating parts and second heating parts. The bending portion is made of a low resistivity material, and the first heating portion is made of a high resistivity material.

2. The heating element according to claim 1, characterized in that, The second heating element, which is disposed between two adjacent bending portions, is constructed of the low resistivity material.

3. The heating element according to claim 1, characterized in that, The second heating element is constructed from the high resistivity material.

4. The heating element according to any one of claims 1-3, characterized in that, The low resistivity material includes silver or gold; the high resistivity material includes a silver-palladium alloy.

5. The heating element according to claim 1, characterized in that, The first heating element is a straight structure extending along a first direction, and the second heating element is a straight structure extending along a second direction, wherein the first direction and the second direction are perpendicular to each other.

6. The heating element according to claim 5, characterized in that, At least two of the plurality of first heating elements have different extension lengths.

7. The heating element according to claim 1, characterized in that, The widths of the plurality of first heating elements and the plurality of second heating elements are all the same.

8. The heating element according to claim 1, characterized in that, The bending directions of the bent portions located at both ends of the same second heating element are perpendicular to each other.

9. The heating element according to claim 1, characterized in that, The heating circuit is provided in multiple ways, and the multiple heating circuits are connected in parallel; the heating element also includes a first electrode part, multiple second electrode parts and a connector, one end of each of the multiple heating circuits is connected to the first electrode part through the connector, and the other end is connected to the second electrode part one by one.

10. An aerosol generating device, characterized in that, It includes a power supply component and a heating element as described in any one of claims 1-9, wherein the power supply component supplies power to the heating element.

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