Heating device and electronic cigarette device

Abstract

A heating device and an electronic cigarette device. The heating device comprises a tube body (100), a heating circuit (200) and a plurality of positioning members (600), wherein the heating circuit (200) is arranged on an inner side wall of the tube body (100); the plurality of positioning members (600) are circumferentially arranged in an array on the inner side wall of the tube body (100); and the positioning members (600) are elastic pieces arranged on the inner side wall of the tube body (100), the distance between a first end of each elastic piece and an inlet portion (110) of the tube body (100) being less than the distance between a second end thereof and the inlet portion (110) of the tube body (100), the first end of each elastic piece being connected to the inner side wall of the tube body (100), and there being a preset spacing between the second end of each elastic piece and the inner side wall of the tube body (100). By means of circumferentially arranging the plurality of positioning members (600) in an array on the inner side wall of the tube body (100), the positioning members (600) can position a cigarette inserted into the tube body (100), thereby preventing the cigarette from moving inside the tube body (100); therefore, the temperature at various positions of the cigarette in the heating device can be more uniform, and it is ensured that nicotine and vapor in the cigarette can be fully volatilized, thereby improving the utilization efficiency of the cigarette.

Description

Heating devices and electronic smoking devices

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on November 20, 2023, with application numbers 202311550912.1 and 202323132717.5, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic smoking devices, and in particular to heating devices and electronic smoking devices. Background Art

[0003] Unlike traditional combustible cigarettes, heat-not-burn (HNB) smoking devices heat the tobacco product at low temperatures, releasing nicotine and smoke. This low-temperature heating typically occurs at around 300°C, significantly lower than the 800°C (+800°C) combustion temperature of combustible cigarettes. Under these conditions, the levels of harmful substances in the smoke released from the tobacco product are significantly lower than those from combustible cigarettes, significantly reducing the harmful effects of tobacco products on the human body.

[0004] However, when existing heat-not-burn (HNB) smoking devices heat cigarettes, the heating device of the heat-not-burn (HNB) smoking device is not fixed to the cigarette, causing the cigarette to move in the heating device, resulting in uneven temperature at different positions of the cigarette in the heating device, and the nicotine and smoke in the cigarette cannot be fully volatilized, affecting the heating effect of the cigarette. Technical Solutions

[0005] The embodiments of the present application provide a heating device and an electronic smoking device to improve the problem of insufficient volatilization of nicotine and smoke in a cigarette due to uneven temperature at various positions of the cigarette in 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 plurality of positioning members are arranged on the inner side wall of the tube in a circumferential array.

[0010] Furthermore, the positioning member is a spring piece arranged on the inner side wall of the tube body, the distance from the first end of the spring piece to the entrance of the tube body is smaller than the distance from the second end of the spring piece to the entrance of the tube body, the first end of the spring piece is connected to the inner side wall of the tube body, and there is a preset distance between the second end of the spring piece and the inner side wall of the tube body.

[0011] Furthermore, in the length direction of the tube body, the spring piece is arc-shaped, and the central angle of the spring piece is greater than 90° and less than 180°.

[0012] Furthermore, the positioning member is an arc-shaped protrusion formed on the inner side wall of the tube body.

[0013] Furthermore, the positioning member is an arc-shaped convex strip formed on the inner side wall of the tube body, and the arc-shaped convex strip extends from the first end of the tube body to the second end of the tube body.

[0014] Furthermore, the arc-shaped convex strip is provided with a avoidance portion at one end of the entrance of the tube body, the distance from the first end of the avoidance portion to the entrance portion is smaller than the distance from the second end of the avoidance portion to the entrance portion, and the distance from the first end of the avoidance portion to the central axis of the tube body is greater than the distance from the first end of the avoidance portion to the central axis of the tube body.

[0015] Furthermore, a circuit groove is provided on the inner side wall of the tube body, the heating circuit is provided in the circuit groove, and the depth of the circuit groove is substantially equal to the thickness of the heating circuit.

[0016] Furthermore, the heating device also includes a protective layer, which is arranged on the inner wall of the tube body and covers the heating circuit.

[0017] Furthermore, the material of the tube body is polyimide, and the protective layer is a polyimide film.

[0018] In a second aspect, an embodiment of the present application provides an electronic smoking device, which includes the heating device.

[0019] Beneficial effects of this application:

[0020] The present application provides a heating device comprising a tube, a heating circuit, and a plurality of positioning members; the heating circuit is disposed on the inner sidewall of the tube; and the plurality of positioning members are arranged in a circular array on the inner sidewall of the tube. By arranging the plurality of positioning members in a circular array on the inner sidewall of the tube, the positioning members can position a cigarette inserted into the tube, preventing the cigarette from shifting within the tube. This allows for more uniform temperature at various locations on the cigarette in the heating device, ensuring sufficient volatilization of nicotine and smoke from the cigarette, thereby improving cigarette utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of a heating device according to a first embodiment of the present application;

[0022] FIG2 is a top view of the heating device shown in FIG1 of the present application;

[0023] FIG3 is a cross-sectional view of the heating device shown in FIG2 at position AA′ in the present application;

[0024] FIG4 is an enlarged view of position B of the heating device shown in FIG3 of the present application;

[0025] FIG5 is a schematic diagram of a heating device according to a second embodiment of the present application;

[0026] FIG6 is a top view of the heating device shown in FIG5 of the present application;

[0027] FIG7 is a schematic diagram of a heating device according to a third embodiment of the present application;

[0028] FIG8 is a top view of the heating device shown in FIG7 of the present application. 100 - pipe body, 110 - inlet; 200 - heating circuit; 300 - protective layer; 400 - heat-dissipating layer; 500 - heat-insulating layer; 600 - positioning member.

[0029] Implementation Methods of the Application

[0030] 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.

[0031] 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 expressly limited.

[0032] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0033] Unlike traditional combustible cigarettes, heat-not-burn (HNB) smoking devices heat the tobacco product at low temperatures, releasing nicotine and smoke. This low-temperature heating typically occurs at around 300°C, significantly lower than the 800°C (+800°C) combustion temperature of combustible cigarettes. Under these conditions, the levels of harmful substances in the smoke released from the tobacco product are significantly lower than those from combustible cigarettes, significantly reducing the harmful effects of tobacco products on the human body.

[0034] However, when existing heat-not-burn (HNB) smoking devices heat cigarettes, the heating device of the heat-not-burn (HNB) smoking device is not fixed to the cigarette, causing the cigarette to move in the heating device, resulting in uneven temperature at different positions of the cigarette in the heating device, and the nicotine and smoke in the cigarette cannot be fully volatilized, affecting the heating effect of the cigarette.

[0035] Therefore, a first embodiment of the present application provides an electronic smoking device, which includes a heating device. Referring to FIG. 1 to FIG. 4 , the heating device includes a tube body 100 , a heating circuit 200 , and a plurality of positioning members 600 .

[0036] Specifically, the heating circuit 200 is disposed on the inner wall of the tube body 100 , and a plurality of positioning members 600 are disposed on the inner wall of the tube body 100 in a circumferential array.

[0037] 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 toward 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 heat is transferred to the cigarette by the tube body 100, the heat transfer path can be reduced, thereby improving the heating efficiency of the heating device; at the same time, since a plurality of positioning members 600 are arranged in a circular array on the inner wall of the tube body 100, the positioning members 600 can position the cigarette inserted into the tube body 100, preventing the cigarette from moving in 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.

[0038] Referring to Figures 3-4, in this embodiment, the positioning member 600 is a spring element arranged on the inner wall of the tube body 100, and the distance from the first end of the spring element to the entrance portion 110 of the tube body 100 is smaller than the distance from the second end of the spring element to the entrance portion 110 of the tube body 100. The first end of the spring element is connected to the inner wall of the tube body 100, and there is a preset distance between the second end of the spring element and the inner wall of the tube body 100. By setting the positioning member 600 as a spring clip, the first end of the spring clip is connected to the inner wall of the tube body 100, and a preset distance is provided between the second end of the spring clip and the inner wall of the tube body 100. When the cigarette is inserted into the tube body 100, the second end of the spring clip can move in the direction away from the cigarette when the cigarette passes through the spring clip. After the cigarette passes through the spring clip, the spring clip has elastic potential energy to restore the deformation, squeezing 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 clip is provided, the spring clip can be deformed under the action of external force, so when cigarettes of different diameters are inserted into the tube body 100, the spring clip 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 during use.

[0039] In this embodiment, a spring clip is used to position the cigarette in the above scheme. However, since the spring clip is in sheet form 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 interior of the tube body 100. Therefore, along the length of the tube body 100, the spring is set to be arc-shaped, and the central angle of the spring is greater than 90° and less than 180°; the arc-shaped spring can prevent the cigarette from scratching the side wall of the cigarette during insertion into the tube body 100, and prevent the contents of the cigarette from leaking into the interior of the tube body 100; at the same time, because the central angle of the spring along the length of the tube body 100 is greater than 90° and less than 180°, when the cigarette is removed from the tube body 100, the second end of the spring will not contact the side wall of the cigarette, preventing the side wall of the cigarette from being scratched by the spring, causing the contents of the cigarette to leak into the interior of 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. Preferably, the degrees of the circular angle corresponding to the arc-shaped spring are 135°, 150°, 165°, and 170°.

[0040] In this embodiment, spring clips are arranged in a linear array on the inner sidewall of the tube body 100 along the length of the tube body 100. Of the multiple linearly arranged spring clips, at least one is arranged near the entrance 110 of the tube body 100, at least one is arranged away from the entrance 110, and at least one is located in the middle region of the tube body 100. Arranging the spring clips in a linear array on the inner sidewall of the tube body 100 cooperates with the spring clips arranged in a circular array, enabling the spring clips to provide multi-point support for the upper, middle, and lower portions of the cigarette within the tube body 100, as well as for the surrounding areas of the upper, middle, and lower portions of the cigarette. This creates an airflow channel between the sidewall of the cigarette and the sidewall of the tube body 100, ensuring that air can enter the tube body 100 to form an airflow loop, facilitating smoking.

[0041] 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 circumferential manner; along the length direction of the tube body 100, there are three spring pieces arranged on the inner wall of the tube body 100 in a linear array.

[0042] 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 circular pattern; along the length direction of the tube body 100, there are four spring pieces arranged on the inner side wall of the tube body 100 in a linear array.

[0043] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are five spring pieces arranged in a circular pattern; along the length direction of the tube body 100, there are five spring pieces arranged on the inner side wall of the tube body 100 in a linear array.

[0044] In this embodiment, the heating device also includes a protective layer 300, a heat-balancing layer 400 and an insulating layer 500. The protective layer 300 is arranged on the inner wall of the tube body 100, and the protective layer 300 covers the heating circuit 200. The heat-balancing layer 400 is arranged on the surface of the protective layer 300 away from the tube body 100, and the insulating layer 500 is arranged on the surface of the tube body 100 away from the protective layer 300, wherein a plurality of positioning members 600 are arranged in a circular array on the surface of the heat-balancing layer 400 away from the tube body 100. By providing the protective layer 300, the protective layer 300 can protect the heating circuit 200, preventing the heating circuit 200 from being oxidized or contaminated, which may cause abnormal operation of the heating device. In addition, due to the provision of the heat-dissipating layer 400, the heat generated by the heating circuit 200 can be more evenly transferred to various positions of the cigarette, ensuring that the contents in different positions of the cigarette can be fully volatilized. At the same time, due to the provision of the heat-insulating layer 500, the heat generated by the heating circuit 200 can be reduced from being dissipated to the outside, thereby improving the heating efficiency of the heating device.

[0045] In this embodiment, a circuit groove is provided on the inner sidewall of the tube body 100, and the heating circuit 200 is disposed within the circuit groove. The depth of the circuit groove is substantially equal to the thickness of the heating circuit 200. The provision of the circuit groove allows the heating circuit 200 to be installed according to the pre-set circuit groove, thereby improving the convenience of assembling the heating circuit 200 to the tube body 100. Furthermore, because the depth of the circuit groove is substantially equal to the thickness of the heating circuit 200, the heating circuit 200 can be fully assembled within the circuit groove, preventing the heating circuit 200 from protruding from the circuit groove, thereby facilitating the installation of the protective layer 300 on the inner sidewall of the tube body 100.

[0046] 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 thermal compression bonding.

[0047] In this embodiment, the material of the heat-dissipating layer 400 includes at least one of stainless steel, aluminum, and copper.

[0048] In this embodiment, the heating circuit 200 includes at least one of a mesh heating wire and a printed circuit.

[0049] 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 making up the tube body 100 is 5, 6, or 7.

[0050] In this 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.

[0051] In this embodiment, the length of the protective layer 300 is greater than the length of the heating circuit 200 along the length of the tube body 100. By being arranged along the length of the tube body 100, the protective layer 300 is longer 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.

[0052] In this embodiment, the distance from the first end of the protective layer 300 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 300 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.

[0053] In this embodiment, the length of the protective layer 300 is greater than the length of the heat-absorbing layer 400 along the length of the tube body 100. By providing the protective layer 300 along the length of the tube body 100 so that the protective layer 300 is greater than the length of the heating circuit 200 and the heat-absorbing layer 400, heat can be prevented from being transferred to both ends of the tube body 100, thereby improving the heating efficiency of the heating device.

[0054] In this embodiment, the distance from the first end of the protective layer 300 to the first end of the tube body 100 is greater than the distance from the first end of the thermally absorbing layer 400 to the first end of the tube body 100, and the distance from the second end of the protective layer 300 to the second end of the tube body 100 is greater than the distance from the second end of the thermally absorbing layer 400 to the second end of the tube body 100.

[0055] In this embodiment, the tube body 100 is circular.

[0056] In this embodiment, the tube body 100 is polygonal.

[0057] The production principle of the heating device:

[0058] First, the substrate is cut into sheets according to the required size specifications; then the PI (polyimide) substrate is fixed 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; then the protective layer 300 and the heat-absorbing layer 400 are bonded in sequence to form a layered structure, and then the spring piece is fixed on the heat-absorbing layer 400; finally, the layered structure with the spring piece fixed is rolled into the final tube body 100.

[0059] 5 and 6 , a second embodiment of the present application provides an electronic smoking device. The second embodiment is similar to the first embodiment, but differs from the first embodiment in that the positioning member 600 is a curved protrusion formed on the inner sidewall of the tube body 100. By configuring the positioning member 600 as a curved protrusion formed on the inner sidewall of the tube body 100, the cigarette inserted into the tube body 100 can be secured, preventing the cigarette from shifting within the tube body 100. This allows for more uniform temperature distribution across the cigarette within the heating device, ensuring sufficient volatilization of nicotine and smoke from the cigarette, thereby improving cigarette utilization efficiency and enhancing the user experience when using the electronic smoking device. Furthermore, during insertion of the cigarette into the tube body 100, the curved protrusion can provide a clearance for the cigarette, preventing it from blocking the end of the cigarette during insertion, ensuring easier insertion into the tube body 100.

[0060] In this embodiment, arcuate protrusions are arranged in a linear array on the inner sidewall of the tube body 100 along the length of the tube body 100. Of the multiple arcuate protrusions arranged in a linear array, at least one is located near the entrance 110 of the tube body 100, at least one is located away from the entrance 110, and at least one is located in the middle region of the tube body 100. Arranging the arcuate protrusions in a linear array on the inner sidewall of the tube body 100 cooperates with the arcuate protrusions arranged in a circular array, enabling the arcuate protrusions to provide multi-point support for the upper, middle, and lower portions of a cigarette within the tube body 100, as well as for the surrounding areas of the upper, middle, and lower portions of the cigarette. This creates an airflow channel between the sidewall of the cigarette and the sidewall of the tube body 100, ensuring that air can enter the tube body 100 and form an airflow loop, facilitating smoking.

[0061] 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 circular pattern; along the length direction of the tube body 100, there are three arc-shaped protrusions arranged in a linear array on the inner side wall of the tube body 100.

[0062] 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 circular pattern; along the length direction of the tube body 100, there are four arc-shaped protrusions arranged in a linear array on the inner side wall of the tube body 100.

[0063] In this embodiment, along the length direction of the tube body 100, on the same cross section, there are 5 arc-shaped protrusions arranged in a circular pattern; along the length direction of the tube body 100, there are 5 arc-shaped protrusions arranged in a linear array on the inner side wall of the tube body 100.

[0064] In this embodiment, the heating device also includes a protective layer 300, a heat-balancing layer 400 and an insulating layer 500. The protective layer 300 is arranged on the inner wall of the tube body 100, and the protective layer 300 covers the heating circuit 200. The heat-balancing layer 400 is arranged on the surface of the protective layer 300 away from the tube body 100, and the insulating layer 500 is arranged on the surface of the tube body 100 away from the protective layer 300, wherein a plurality of positioning members 600 are arranged in a circular array on the surface of the heat-balancing layer 400 away from the tube body 100. By providing the protective layer 300, the protective layer 300 can protect the heating circuit 200, preventing the heating circuit 200 from being oxidized or contaminated, which may cause abnormal operation of the heating device. In addition, due to the provision of the heat-dissipating layer 400, the heat generated by the heating circuit 200 can be more evenly transferred to various positions of the cigarette, ensuring that the contents in different positions of the cigarette can be fully volatilized. At the same time, due to the provision of the heat-insulating layer 500, the heat generated by the heating circuit 200 can be reduced from being dissipated to the outside, thereby improving the heating efficiency of the heating device.

[0065] In this embodiment, a circuit groove is provided on the inner sidewall of the tube body 100, and the heating circuit 200 is disposed within the circuit groove. The depth of the circuit groove is substantially equal to the thickness of the heating circuit 200. The provision of the circuit groove allows the heating circuit 200 to be installed according to the pre-set circuit groove, thereby improving the convenience of assembling the heating circuit 200 to the tube body 100. Furthermore, because the depth of the circuit groove is substantially equal to the thickness of the heating circuit 200, the heating circuit 200 can be fully assembled within the circuit groove, preventing the heating circuit 200 from protruding from the circuit groove, thereby facilitating the installation of the protective layer 300 on the inner sidewall of the tube body 100.

[0066] 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 thermal compression bonding.

[0067] In this embodiment, the material of the heat-dissipating layer 400 includes at least one of stainless steel, aluminum, and copper.

[0068] In this embodiment, the heating circuit 200 includes at least one of a mesh heating wire and a printed circuit.

[0069] 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 making up the tube body 100 is 5, 6, or 7.

[0070] In this 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.

[0071] In this embodiment, the length of the protective layer 300 is greater than the length of the heating circuit 200 along the length of the tube body 100. By being arranged along the length of the tube body 100, the protective layer 300 is longer 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.

[0072] In this embodiment, the distance from the first end of the protective layer 300 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 300 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.

[0073] In this embodiment, the length of the protective layer 300 is greater than the length of the heat-absorbing layer 400 along the length of the tube body 100. By providing the protective layer 300 along the length of the tube body 100 so that the protective layer 300 is greater than the length of the heating circuit 200 and the heat-absorbing layer 400, heat can be prevented from being transferred to both ends of the tube body 100, thereby improving the heating efficiency of the heating device.

[0074] In this embodiment, the distance from the first end of the protective layer 300 to the first end of the tube body 100 is greater than the distance from the first end of the thermally absorbing layer 400 to the first end of the tube body 100, and the distance from the second end of the protective layer 300 to the second end of the tube body 100 is greater than the distance from the second end of the thermally absorbing layer 400 to the second end of the tube body 100.

[0075] In this embodiment, the tube body 100 is circular.

[0076] In this embodiment, the tube body 100 is polygonal.

[0077] The production principle of the heating device:

[0078] First, the substrate is cut into sheets according to the required size specifications; then the PI (polyimide) substrate is placed 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 and bonding; then the protective layer 300 and the heat-dissipating layer 400 are bonded in sequence to form a layered structure, and then the layered structure is punched 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.

[0079] 7 and 8 , a third embodiment of the present application provides an electronic smoking device. The third embodiment is similar to the first embodiment, but differs from the first embodiment in that the positioning member 600 is an arcuate ridge formed on the inner wall of the tube body 100 , and the arcuate ridge extends from the first end of the tube body 100 to the second end of the tube body 100 . By providing an arcuate ridge and extending the arcuate ridge 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 ridge, the edge of the ridge will not scratch the cigarette during the process of inserting the cigarette into the tube body 100; at the same time, since the positioning parts 600 are arranged in a circular array on the inner wall of the tube body 100, an air flow channel can be formed between two adjacent arcuate ridges, 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 air flow loop, so that the user can smoke the cigarette.

[0080] In this embodiment, a relief portion (not shown) is provided at one end of the arcuate ridge located at the entrance 110 of the tube body 100. The distance from the first end of the relief portion to the entrance 110 is smaller than the distance from the second end of the relief portion to the entrance 110, and the distance from the first end of the relief portion to the central axis of the tube body 100 is greater than the distance from the first end of the relief portion to the central axis of the tube body 100. By setting the distance from the first end of the relief portion to the entrance 110 to be smaller than the distance from the second end of the relief portion to the entrance 110, and the distance from the first end of the relief portion to the central axis of the tube body 100 to be greater than the distance from the first end of the relief portion to the central axis of the tube body 100, the area of ​​the entrance 110 of the tube body 100 is prevented from being reduced due to the provision of the arcuate ridge, and the side wall of the arcuate ridge near the end of the entrance 110 is prevented from abutting against the cigarette and hindering the insertion of the cigarette, thereby ensuring that the cigarette can be inserted into the tube body 100 from the entrance 110.

[0081] In this embodiment, the avoidance portion is an arc-shaped surface.

[0082] In this embodiment, the avoidance portion is an inclined surface.

[0083] In this embodiment, the heating device also includes a protective layer 300, a heat-balancing layer 400 and an insulating layer 500. The protective layer 300 is arranged on the inner wall of the tube body 100, and the protective layer 300 covers the heating circuit 200. The heat-balancing layer 400 is arranged on the surface of the protective layer 300 away from the tube body 100, and the insulating layer 500 is arranged on the surface of the tube body 100 away from the protective layer 300, wherein a plurality of positioning members 600 are arranged in a circular array on the surface of the heat-balancing layer 400 away from the tube body 100. By providing the protective layer 300, the protective layer 300 can protect the heating circuit 200, preventing the heating circuit 200 from being oxidized or contaminated, which may cause abnormal operation of the heating device. In addition, due to the provision of the heat-dissipating layer 400, the heat generated by the heating circuit 200 can be more evenly transferred to various positions of the cigarette, ensuring that the contents in different positions of the cigarette can be fully volatilized. At the same time, due to the provision of the heat-insulating layer 500, the heat generated by the heating circuit 200 can be reduced from being dissipated to the outside, thereby improving the heating efficiency of the heating device.

[0084] In this embodiment, a circuit groove is provided on the inner sidewall of the tube body 100, and the heating circuit 200 is disposed within the circuit groove. The depth of the circuit groove is substantially equal to the thickness of the heating circuit 200. The provision of the circuit groove allows the heating circuit 200 to be installed according to the pre-set circuit groove, thereby improving the convenience of assembling the heating circuit 200 to the tube body 100. Furthermore, because the depth of the circuit groove is substantially equal to the thickness of the heating circuit 200, the heating circuit 200 can be fully assembled within the circuit groove, preventing the heating circuit 200 from protruding from the circuit groove, thereby facilitating the installation of the protective layer 300 on the inner sidewall of the tube body 100.

[0085] 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 thermal compression bonding.

[0086] In this embodiment, the material of the heat-dissipating layer 400 includes at least one of stainless steel, aluminum, and copper.

[0087] In this embodiment, the heating circuit 200 includes at least one of a mesh heating wire and a printed circuit.

[0088] 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 making up the tube body 100 is 5, 6, or 7.

[0089] In this 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.

[0090] In this embodiment, the length of the protective layer 300 is greater than the length of the heating circuit 200 along the length of the tube body 100. By being arranged along the length of the tube body 100, the protective layer 300 is longer 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.

[0091] In this embodiment, the distance from the first end of the protective layer 300 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 300 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.

[0092] In this embodiment, the length of the protective layer 300 is greater than the length of the heat-absorbing layer 400 along the length of the tube body 100. By providing the protective layer 300 along the length of the tube body 100 so that the protective layer 300 is greater than the length of the heating circuit 200 and the heat-absorbing layer 400, heat can be prevented from being transferred to both ends of the tube body 100, thereby improving the heating efficiency of the heating device.

[0093] In this embodiment, the distance from the first end of the protective layer 300 to the first end of the tube body 100 is greater than the distance from the first end of the thermally absorbing layer 400 to the first end of the tube body 100, and the distance from the second end of the protective layer 300 to the second end of the tube body 100 is greater than the distance from the second end of the thermally absorbing layer 400 to the second end of the tube body 100.

[0094] The production principle of the heating device:

[0095] First, the substrate is cut into sheets according to the required size specifications; then, a PI (polyimide) substrate is placed on the insulation layer 500, and a circuit groove is provided 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 protective layer 300 is bonded to form a layered structure, and then the layered structure is punched 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.

[0096] The above describes in detail the specific embodiments of the present application. The above embodiments disclosed in this application are merely preferred embodiments of the present application. Those skilled in the art will appreciate that many variations and improvements can be made without departing from the spirit of the present application. These variations and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A heating device, wherein: include: tube body; A heating circuit, the heating circuit being arranged on the inner wall of the tube body; A plurality of positioning members are arranged on the inner side wall of the tube body in a circumferential array.

2. The heating device according to claim 1, wherein: The positioning member is a spring sheet arranged on the inner side wall of the tube body, 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 inner side wall of the tube body, and there is a preset distance between the second end of the spring sheet and the inner side wall of the tube body.

3. The heating device according to claim 2, wherein: In the length direction of the tube body, the spring piece is arc-shaped, and the central angle of the spring piece is greater than 90° and less than 180°.

4. The heating device according to claim 1, wherein: The positioning member is an arc-shaped protrusion formed on the inner side wall of the tube body.

5. The heating device according to claim 1, wherein: The positioning member is an arc-shaped convex strip formed on the inner side wall of the tube body, and the arc-shaped convex strip extends from the first end of the tube body to the second end of the tube body.

6. The heating device according to claim 5, wherein: The arc-shaped convex strip is provided with a avoidance portion at one end of the entrance of the tube body, the distance from the first end of the avoidance portion to the entrance is smaller than the distance from the second end of the avoidance portion to the entrance, and the distance from the first end of the avoidance portion to the central axis of the tube body is larger than the distance from the first end of the avoidance portion to the central axis of the tube body.

7. The heating device according to claim 1, wherein: 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.

8. The heating device according to any one of claims 1, wherein: The heating device further comprises a protective layer, which is arranged on the inner wall of the tube body and covers the heating circuit.

9. The heating device according to claim 8, wherein: The material of the tube body is polyimide, and the protective layer is a polyimide film.

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

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