Heating device and electronic smoking set

Abstract

The utility model discloses a heating device and an electronic smoking set. The heating device comprises a pipe body, a heating circuit, a protection layer, a soaking layer and a heat insulation layer. The heating circuit is arranged on the inner side wall of the tube body; the protective layer is arranged on the inner side wall of the tube body, and the protective layer covers the heating circuit; the soaking layer is arranged on the surface of the side, away from the pipe body, of the protection layer. The heat insulation layer is arranged on the surface of the side, away from the protection layer, of the pipe body. The heating circuit is arranged on the inner side wall of the pipe body, when the heating device works, heat generated by the heating circuit can be directly transmitted to the cigarette, and compared with the scheme that heat generated by the heating device is firstly transmitted from the outer wall to the inner wall of the pipe body and then transmitted to the cigarette through the pipe body in the prior art, the heating device has the advantages that the heating circuit is arranged on the inner side wall of the pipe body; and the heat transfer path is reduced, so that the heating efficiency of the heating device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic smoking devices, and in particular to a heating device and an electronic smoking device. Background Art

[0002] Unlike traditional burning cigarettes, heat-not-burn tobacco products release nicotine and smoke from tobacco products by heating them at low temperatures. The temperature of low-temperature heating is generally around 300°C, which is much lower than the combustion temperature of burning cigarettes, which is over 800°C. Under low-temperature heating conditions, the content of harmful substances in the smoke released by tobacco products is much lower than that of burning cigarettes, thus greatly reducing the harm of tobacco products to the human body.

[0003] In the related art, the heating device of the heat-not-burn tobacco utensils generally adopts the following two schemes when heating the cigarettes: the first scheme is electromagnetic induction heating, the principle of which is to set the electromagnetic induction coil on the outside of the tube body, and the electromagnetic induction coil generates a magnetic field to heat the tube body when energized, and the tube body then transfers the heat to the cigarette, thereby heating the cigarette; the second scheme is resistance heating, the principle of which is to set the resistance heating element on the outer wall of the tube body, and the resistance heats the tube body when energized, and the tube body then transfers the heat to the cigarette, thereby heating the cigarette.

[0004] However, whether electromagnetic induction heating or resistance heating is used, the heat generated by the heating device is first transferred from the outer wall of the tube to the inner wall, and then the inner wall of the tube transfers the heat to the cigarette. This results in the highest temperature point in the heating device always being on the outer wall of the cigarette tube during the heat transfer process, causing heat loss in the heat transfer process and reducing the heating efficiency of the heating device. Summary of the invention

[0005] The embodiments of the present application provide a heating device and an electronic smoking device to improve the heating efficiency of the heating device.

[0006] In a first aspect, an embodiment of the present application provides a heating device, comprising:

[0007] tube body;

[0008] A heating circuit, the heating circuit being arranged on the inner wall of the tube body;

[0009] A protective layer, the protective layer is arranged on the inner wall of the tube body, and the protective layer covers the heating circuit;

[0010] A heat-spreading layer, the heat-spreading layer is arranged on a surface of the protective layer away from the tube body;

[0011] A heat insulation layer is arranged on the surface of the tube body at a side away from the protective layer.

[0012] Furthermore, a circuit groove is provided on the inner side wall of the tube body, the heating circuit is arranged in the circuit groove, and the depth of the circuit groove is substantially equal to the thickness of the heating circuit.

[0013] Furthermore, the material of the heat-balancing layer includes at least one of stainless steel, aluminum, and copper.

[0014] Furthermore, the heating circuit includes at least one of a mesh heating wire and a printed circuit.

[0015] Furthermore, the tube body includes multiple layers of PI films stacked in sequence, and the protective layer includes at least one layer of PI film.

[0016] Furthermore, the heating device also includes a plurality of positioning members, which are arranged in a circular array on the surface of the heat-absorbing layer on a side away from the tube body.

[0017] Furthermore, the positioning member is a spring sheet arranged on the heat-balancing layer, the distance from the first end of the spring sheet to the entrance of the tube body is smaller than the distance from the second end of the spring sheet to the entrance of the tube body, the first end of the spring sheet is connected to the heat-balancing layer, and the second end of the spring sheet has a preset distance from the heat-balancing layer.

[0018] Furthermore, the positioning member is an arc-shaped protrusion formed on the heat-leveling layer.

[0019] Furthermore, the positioning member is an arc-shaped convex strip formed on the heat-balancing layer, and the arc-shaped convex strip extends from the first end of the tube body to the second end of the tube body.

[0020] In a second aspect, an embodiment of the present application provides an electronic smoking device, wherein the electronic smoking device comprises the heating device.

[0021] Beneficial effects of this application:

[0022] The present application provides a heating device, including a tube body, a heating circuit, a protective layer, a heat-equalizing layer and a heat-insulating layer; the heating circuit is arranged on the inner wall of the tube body; the protective layer is arranged on the inner wall of the tube body, and the protective layer covers the heating circuit; the heat-equalizing layer is arranged on the surface of the protective layer away from the tube body; the heat-insulating layer is arranged on the surface of the tube body away from the protective layer. By arranging the heating circuit on the inner wall of the tube body, when the heating device is working, the heat generated by the heating circuit can be directly transferred to the cigarette, reducing the transfer of the heat generated by the heating circuit to the outer wall of the tube body. Compared with the existing solution in which the heat generated by the heating device is first transferred from the outer wall of the tube body to the inner wall, and then the heat is transferred to the cigarette by the tube body, the heat transfer path is reduced, thereby improving the heating efficiency of the heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a first structure of a heating device in the present application;

[0024] Figure 2 This application Figure 1 A cross-sectional view of the heating device shown;

[0025] Figure 3 is a schematic diagram of a second structure of the heating device in the present application;

[0026] Figure 4 This application Figure 3 A cross-sectional view of the heating device shown;

[0027] Figure 5 This application Figure 4 An enlarged view of position A of the heating device shown;

[0028] Figure 6 is a top view of a third structure of the heating device in the present application;

[0029] Figure 7 This application Figure 6 A cross-sectional view of the heating device shown at position BB′;

[0030] Figure 8 is a schematic diagram of a fourth structure of the heating device in the present application;

[0031] Fig. 9 This application Figure 8 A top view of the heating device shown;

[0032] Fig.10 is a schematic diagram of a fifth structure of the heating device in the present application;

[0033] Fig.11 This application Fig.10 A top view of the heating device is shown.

[0034] 100 - pipe body, 110 - entrance; 200 - heating circuit; 300 - protective layer; 400 - heat equalizing layer; 500 - heat insulating layer; 600 - positioning piece. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0036] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0037] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0038] In the related art, the heating device of the heat-not-burn tobacco utensils generally adopts the following two schemes when heating the cigarettes: the first scheme is electromagnetic induction heating, the principle of which is to set the electromagnetic induction coil on the outside of the tube body, and the electromagnetic induction coil generates a magnetic field to heat the tube body when energized, and the tube body then transfers the heat to the cigarette, thereby heating the cigarette; the second scheme is resistance heating, the principle of which is to set the resistance heating element on the outer wall of the tube body, and the resistance heats the tube body when energized, and the tube body then transfers the heat to the cigarette, thereby heating the cigarette.

[0039] However, whether electromagnetic induction heating or resistance heating is used, the heat generated by the heating device is first transferred from the outer wall of the tube to the inner wall, and then the inner wall of the tube transfers the heat to the cigarette. This results in the highest temperature point in the heating device always being on the outer wall of the cigarette tube during the heat transfer process, causing heat loss in the heat transfer process and reducing the heating efficiency of the heating device.

[0040] Therefore, the present application provides an electronic smoking device, the electronic smoking device includes a heating device, and the Figure 1-Figure 2 The heating device includes a tube body 100 , a heating circuit 200 , and a protective layer 300 .

[0041] Specifically, the heating circuit 200 is disposed on the inner wall of the tube body 100 ; the protective layer 300 is disposed on the inner wall of the tube body 100 , and the protective layer 300 covers the heating circuit 200 .

[0042] By arranging the heating circuit 200 on the inner wall of the tube body 100, when the heating device is working, the heat generated by the heating circuit 200 can be directly transferred to the cigarette. Compared with the existing solution in which the heat generated by the heating device is first transferred from the outer wall to the inner wall of the tube body 100 and then the tube body 100 transfers the heat to the cigarette, the heat transfer path can be reduced, thereby improving the heating efficiency of the heating device; and since the protective layer 300 is provided, the protective layer 300 can protect the heating circuit 200 and prevent the heating circuit 200 from being oxidized or contaminated, causing abnormal operation of the heating device.

[0043] refer to Figure 3-Figure 5In this embodiment, the heating device further includes a heat-equalizing layer and a heat-insulating layer. The heat-equalizing layer is disposed on the surface of the protective layer away from the tube body, and the heat-insulating layer is disposed on the surface of the tube body away from the protective layer. By providing the heat-equalizing layer, the heat generated by the heating circuit can be more evenly transferred to various positions of the cigarette, ensuring that the contents of different positions in the cigarette can be fully volatilized. At the same time, due to the provision of the heat-insulating layer, the heat generated by the heating circuit can be reduced from being dissipated to the outside, thereby improving the heating efficiency of the heating device.

[0044] In this embodiment, a circuit groove is provided on the inner side wall of the tube body 100, and the heating circuit 200 is provided in the circuit groove, and the depth of the circuit groove is substantially equal to the thickness of the heating circuit 200. By providing the circuit groove, the heating circuit 200 can be installed according to the preset circuit groove during installation, thereby improving the convenience of assembling the heating circuit 200 to the tube body 100; at the same time, since the depth of the circuit groove is substantially equal to the thickness of the heating circuit 200, the heating circuit 200 can be completely assembled into the circuit groove, and the heating circuit 200 is prevented from protruding from the circuit groove, so as to facilitate the provision of the protective layer 300 on the inner side wall of the tube body 100.

[0045] In this embodiment, the heating circuit 200 is fixed in the circuit groove by bonding. The heating circuit 200 is fixed in the circuit groove by hot pressing bonding.

[0046] In this embodiment, the material of the heat-dissipating layer 400 includes at least one of stainless steel, aluminum, and copper.

[0047] In this embodiment, the heating circuit 200 includes at least one of a mesh heating wire and a printed circuit.

[0048] In this embodiment, the tube body 100 includes multiple layers of PI (polyimide) films stacked in sequence. Preferably, the number of layers of the PI (polyimide) films used to make the tube body 100 is 5 layers, 6 layers, or 7 layers.

[0049] In the present embodiment, the protective layer 300 includes at least one layer of PI (polyimide) film. Preferably, the protective layer 300 is a layer of PI (polyimide) film. By setting the protective layer 300 as a layer of polyimide film, the heat generated by the heating circuit 200 can be conducted to the cigarette only through a layer of film, reducing the heat transfer path generated by the heating circuit 200, thereby improving the efficiency of the heating device when working. In the present embodiment, in the length direction of the tube body 100, the length of the protective layer 300 is greater than the length of the heating circuit 200. By being set in the length direction of the tube body 100, the length of the protective layer 300 is greater than the length of the heating circuit 200 and the heat-dissipating layer 400, which can prevent heat from being transferred to both ends of the tube body 100, thereby improving the heating efficiency of the heating device.

[0050] In this embodiment, the distance from the first end of the protective layer to the first end of the tube body 100 is greater than the distance from the first end of the heating circuit 200 to the first end of the tube body 100, and the distance from the second end of the protective layer to the second end of the tube body 100 is greater than the distance from the second end of the heating circuit 200 to the second end of the tube body 100.

[0051] In this embodiment, the length of the protective layer 300 is greater than the length of the heat-absorbing layer 400 in the length direction of the tube body 100. By being arranged in the length direction of the tube body 100, the length of the protective layer 300 is greater than the length of the heating circuit 200 and the heat-absorbing layer 400, which can prevent heat from being transferred to both ends of the tube body 100, thereby improving the heating efficiency of the heating device.

[0052] In this embodiment, the distance from the first end of the protective layer to the first end of the tube body 100 is greater than the distance from the first end of the heat-absorbing layer 400 to the first end of the tube body 100, and the distance from the second end of the protective layer to the second end of the tube body 100 is greater than the distance from the second end of the heat-absorbing layer 400 to the second end of the tube body 100. In this embodiment, the tube body 100 is circular.

[0053] In this embodiment, the tube body 100 is a polygon.

[0054] In this embodiment, the heating device further includes a plurality of positioning members 600, which are arranged in a circumferential array on the surface of the heat-absorbing layer 400 away from the tube body 100. By arranging the plurality of positioning members 600 in a circumferential array on the surface of the heat-absorbing layer 400 away from the tube body 100, the positioning members 600 can position the cigarette inserted into the tube body 100, thereby preventing the cigarette from moving in the tube body 100, making the temperature of each position of the cigarette in the heating device more uniform, ensuring that the nicotine and smoke in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette.

[0055] refer to Figure 6-Figure 7In this embodiment, the positioning member 600 is a spring sheet arranged on the heat-balancing layer 400, and the distance from the first end of the spring sheet to the entrance of the tube body 100 is smaller than the distance from the second end of the spring sheet to the entrance of the tube body 100. The first end of the spring sheet is connected to the heat-balancing layer 400, and there is a preset distance between the second end of the spring sheet and the heat-balancing layer 400. By making the positioning member 600 a spring sheet disposed on the heat-averaging layer 400, the first end of the spring sheet is connected to the heat-averaging layer 400, and a preset distance is provided between the second end of the spring sheet and the heat-averaging layer 400. When the cigarette is inserted into the tube body 100, when the cigarette passes through the spring sheet, the second end of the spring sheet can move in the direction away from the cigarette. After the cigarette passes through the spring sheet, the spring sheet has elastic potential energy to restore the deformation, and squeezes the cigarette, thereby fixing the cigarette to prevent the cigarette from moving inside the tube body 100, so that the temperature of each position of the cigarette in the heating device can be more uniform, ensuring that the nicotine and smoke in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette; at the same time, since the spring sheet is provided, the spring sheet can be deformed under the action of external force, so when cigarettes of different diameters are inserted into the tube body 100, the spring sheet also fixes the cigarettes of different diameters, thereby ensuring that the electronic cigarette device can match cigarettes of different diameters, thereby improving the compatibility of the electronic cigarette device when in use.

[0056] In this embodiment, a spring clip is used to position the cigarette in the above scheme, but since the spring clip is in sheet shape and the side wall of the cigarette is made of paper material, the side wall of the cigarette will be scratched when the cigarette is inserted into the tube body 100 or taken out of the tube body 100, causing the contents of the cigarette to leak into the inside of the tube body 100. Therefore, along the length direction of the tube body 100, the spring piece is set to be arc-shaped, and the center angle of the spring piece is greater than 90° and less than 180°; the arc-shaped spring piece can prevent the cigarette from scratching the side wall of the cigarette during the insertion of the tube body 100, and prevent the contents of the cigarette from leaking into the inside of the tube body 100; at the same time, since along the length direction of the tube body 100, the center angle of the spring piece is greater than 90° and less than 180°, then when the cigarette is taken out of the tube body 100, the second end of the spring piece will not contact the side wall of the cigarette, and the side wall of the cigarette is prevented from being scratched by the spring piece, causing the contents of the cigarette to leak into the inside of the tube body 100, so that the temperature of each position of the cigarette in the heating device can be more uniform, ensuring that the nicotine and smoke in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette. Preferably, the degree of the circular angle corresponding to the arc-shaped spring piece is 135°, 150°, 165°, 170°.

[0057] In this embodiment, along the length direction of the tube body 100, the spring sheets are arranged on the heat-absorbing layer 400 in a linear array; among the multiple spring sheets arranged in a linear array, at least one spring sheet is arranged on a side close to the entrance of the tube body 100, at least one spring sheet is arranged on a side away from the entrance of the tube body 100, and at least one spring sheet is located in the middle area of ​​the tube body 100. By arranging the spring sheets on the heat-absorbing layer 400 in a linear array, it can cooperate with the spring sheets arranged in a circular array, so that the spring sheets can form multi-point support for the upper, middle and lower parts of the cigarette in the tube body 100 and the surroundings of the upper, middle and lower parts of the cigarette, so that an airflow channel can be formed between the side wall of the cigarette and the side wall of the tube body 100, ensuring that air can enter the tube body 100 to form an airflow loop, so that the user can smoke the cigarette.

[0058] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are three spring pieces arranged in a circle; along the length direction of the tube body 100, there are three spring pieces arranged on the heat-dissipating layer 400 in a linear array.

[0059] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are four spring pieces arranged in a circle; along the length direction of the tube body 100, there are four spring pieces arranged on the heat-dissipating layer 400 in a linear array.

[0060] In this embodiment, along the length direction of the tube body 100, on the same cross section, the number of spring pieces arranged in a circle is 5; along the length direction of the tube body 100, the number of spring pieces arranged on the heat-dissipating layer 400 in a linear array is 5.

[0061] The production principle of the heating device:

[0062] First, the substrate is cut into sheets according to the required size specifications; then the PI (polyimide) substrate is fixedly set on the insulation layer 500, and a circuit groove is set on the PI (polyimide) substrate, the heating circuit 200 is placed in the circuit groove of the PI (polyimide) substrate, and the heating circuit 200 is fixed in the circuit groove of the PI (polyimide) substrate by hot pressing bonding; then the protective layer 300 and the heat-absorbing layer 400 are bonded in turn to form a layered structure, and then the spring sheet is fixed on the heat-absorbing layer 400; finally, the layered structure with the spring sheet fixed is rolled into the final tube body 100.

[0063] refer to Figure 8 and Fig. 9In this embodiment, the positioning member 600 is an arc-shaped protrusion formed on the heat-equalizing layer 400. By setting the positioning member 600 as an arc-shaped protrusion formed on the heat-equalizing layer 400, on the one hand, the cigarette inserted into the tube body 100 can be fixed to prevent the cigarette from moving inside the tube body 100, so that the temperature of each position of the cigarette in the heating device can be more uniform, ensuring that the nicotine and smoke in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette. On the other hand, during the process of inserting the cigarette into the tube body 100, the arc-shaped protrusion can avoid the cigarette, preventing the cigarette from resisting the end of the cigarette during the process of inserting the cigarette into the tube body 100, ensuring that the cigarette can be inserted into the tube body 100 more easily.

[0064] In this embodiment, along the length direction of the tube body 100, the arc-shaped protrusions are arranged in a linear array on the heat-dissipating layer 400; wherein, among the multiple arc-shaped protrusions arranged in a linear array, at least one arc-shaped protrusion is arranged on a side close to the entrance of the tube body 100, at least one arc-shaped protrusion is arranged on a side away from the entrance of the tube body 100, and at least one arc-shaped protrusion is located in the middle area of ​​the tube body 100. By arranging the arc-shaped protrusions in a linear array on the heat-dissipating layer 400, it can cooperate with the arc-shaped protrusions arranged in a circular array, so that the arc-shaped protrusions can form multi-point support for the upper, middle and lower parts of the cigarette in the tube body 100 and the surroundings of the upper, middle and lower parts of the cigarette, so that an airflow channel can be formed between the side wall of the cigarette and the side wall of the tube body 100, ensuring that air can enter the tube body 100 to form an airflow loop, so as to facilitate the user to smoke the cigarette.

[0065] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are three arc-shaped protrusions arranged in a circle; along the length direction of the tube body 100, there are three arc-shaped protrusions arranged in a linear array on the heat-dissipating layer 400.

[0066] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are four arc-shaped protrusions arranged in a circle; along the length direction of the tube body 100, there are four arc-shaped protrusions arranged in a linear array on the heat-dissipating layer 400.

[0067] In this embodiment, along the length direction of the tube body 100, on the same cross section, the number of arc-shaped protrusions arranged in a circle is 5; along the length direction of the tube body 100, the number of arc-shaped protrusions arranged in a linear array on the heat-dissipating layer 400 is 5.

[0068] The production principle of the heating device:

[0069] First, the substrate is cut into sheets according to the required size specifications; then the PI (polyimide) substrate is set on the thermal insulation layer 500, and a circuit groove is set on the PI (polyimide) substrate, the heating circuit 200 is placed in the circuit groove of the PI (polyimide) substrate, and the heating circuit 200 is fixed in the circuit groove of the PI (polyimide) substrate by hot pressing and bonding; then the protective layer 300 and the heat-averaging layer 400 are bonded in sequence to form a layered structure, and then the layered structure is stamped to form an arc-shaped protrusion on the side of the layered structure facing the protective layer 300; finally, the layered structure with the arc-shaped protrusion is rolled into the final tube body 100.

[0070] refer to Fig.10 and Fig.11 In this embodiment, the positioning member 600 is an arc-shaped convex strip formed on the heat-dissipating layer 400 , and the arc-shaped convex strip extends from the first end of the tube body 100 to the second end of the tube body 100 . By providing an arcuate convex strip and extending the arcuate convex strip from the first end of the tube body 100 to the second end of the tube body 100, on the one hand, the cigarette inserted into the tube body 100 can be fixed to prevent the cigarette from moving inside the tube body 100, so that the temperature of each position of the cigarette in the heating device can be more uniform, ensuring that the nicotine and smoke in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette; on the other hand, compared with the polygonal convex strip, during the process of inserting the cigarette into the tube body 100, the edge of the convex strip will not scratch the cigarette; at the same time, because the positioning member 600 is arranged in a circular array on the heat-dissipating layer 400, an airflow channel can be formed between two adjacent arcuate convex strips, the side wall of the cigarette and the inner wall of the tube body 100, ensuring that air can enter the tube body 100 to form an airflow loop, so as to facilitate the user to smoke the cigarette.

[0071] In this embodiment, an escape portion (not shown in the figure) is provided at one end of the arc-shaped convex strip located at the entrance of the tube body 100, and the distance from the first end of the escape portion to the entrance is smaller than the distance from the second end of the escape portion to the entrance, and the distance from the first end of the escape portion to the central axis of the tube body 100 is larger than the distance from the first end of the escape portion to the central axis of the tube body 100. By setting the distance from the first end of the escape portion to the entrance to be smaller than the distance from the second end of the escape portion to the entrance, and the distance from the first end of the escape portion to the central axis of the tube body 100 is larger than the distance from the first end of the escape portion to the central axis of the tube body 100, it is possible to avoid the area of ​​the entrance of the tube body 100 being reduced due to the provision of the arc-shaped convex strip, prevent the side wall of the arc-shaped strip near one end of the entrance from abutting against the cigarette and causing obstruction to the insertion of the cigarette, and ensure that the cigarette can be better inserted into the tube body 100 from the entrance of the tube body 100.

[0072] In this embodiment, the avoiding portion is an arc-shaped surface.

[0073] In this embodiment, the avoidance portion is an inclined surface.

[0074] The production principle of the heating device:

[0075] First, the substrate is cut into sheets according to the required size specifications; then the PI (polyimide) substrate is set on the insulation layer 500, and a circuit groove is set on the substrate, the heating circuit 200 is placed in the circuit groove of the PI (polyimide) substrate, and the heating circuit 200 is fixed in the circuit groove of the PI (polyimide) substrate by hot pressing and bonding; then a layer of protective layer 300 is bonded to form a layered structure, and then the layered structure is stamped to form an arc-shaped convex strip on the side of the layered structure facing the protective layer 300; finally, the layered structure with the arc-shaped convex strip is rolled into the final tube body 100.

[0076] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A heating device, characterized in that: include: tube body; A heating circuit, the heating circuit being arranged on the inner wall of the tube body; A protective layer, the protective layer is arranged on the inner wall of the tube body, and the protective layer covers the heating circuit; A heat-spreading layer, the heat-spreading layer is arranged on a surface of the protective layer away from the tube body; A heat insulation layer is arranged on the surface of the tube body at a side away from the protective layer.

2. The heating device according to claim 1, characterized in that A circuit groove is provided on the inner side wall of the tube body, the heating circuit is arranged in the circuit groove, and the depth of the circuit groove is substantially equal to the thickness of the heating circuit.

3. The heating device according to claim 1, characterized in that: The material of the heat-absorbing layer includes at least one of stainless steel, aluminum and copper.

4. The heating device according to claim 1, characterized in that The heating circuit includes at least one of a mesh heating wire and a printed circuit.

5. The heating device according to claim 1, characterized in that: The tube body comprises a plurality of PI films stacked in sequence, and the protective layer comprises at least one layer of PI film.

6. The heating device according to claim 1, characterized in that: The heating device further comprises a plurality of positioning members, which are arranged in a circumferential array on the surface of the heat-dissipating layer on a side away from the tube body.

7. The heating device according to claim 6, characterized in that The positioning member is a spring sheet arranged on the heat-balancing layer, the distance from the first end of the spring sheet to the entrance of the tube body is smaller than the distance from the second end of the spring sheet to the entrance of the tube body, the first end of the spring sheet is connected to the heat-balancing layer, and there is a preset distance between the second end of the spring sheet and the heat-balancing layer.

8. The heating device according to claim 6, characterized in that The positioning member is an arc-shaped protrusion formed on the heat-dissipating layer.

9. The heating device according to claim 6, characterized in that: The positioning member is an arc-shaped convex strip formed on the heat-dissipating layer, and the arc-shaped convex strip extends from the first end of the tube body to the second end of the tube body.

10. An electronic smoking device, characterized in that: The electronic smoking device comprises the heating device according to any one of claims 1 to 9.

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