Heating tube, manufacturing method thereof, and aerosol generating device

Abstract

The present invention relates to a heating tube, a manufacturing method thereof and an aerosol generating device. The manufacturing method of the heating tube comprises: S1, preparing a tubular blank, the tubular blank comprising a base blank, an electric heating blank layer arranged inside the base blank, and an infrared radiation blank layer arranged inside the electric heating blank layer; S2, sintering the tubular blank. The heating tube is integrally formed by sintering, and has a simple structure and high reliability. The electric heating layer and the infrared radiation layer are arranged on the inner surface of the base tube, and the electric heating layer and the infrared radiation layer are in direct contact to excite radiation, which greatly improves the radiation heating ratio, shortens the heating conduction distance and radiation distance between the electric heating layer, the infrared radiation layer and the aerosol generating matrix, and improves the heating efficiency and heating uniformity.

Description

Technical Field

[0001] The present invention relates to the field of atomization, and more particularly to a heating tube and a manufacturing method thereof, and an aerosol generating device. Background Art

[0002] A heat-not-burn atomizer is an aerosol generating device that heats the atomizer material by low-temperature heating without burning to form an inhalable aerosol. At present, different types of heating elements have been introduced both at home and abroad to heat the atomizer material, such as sheet, rod (needle) and tubular heating elements.

[0003] The tubular heating element is a heating tube in which the atomized material is inserted. When the resistance material on the surface of the heating tube wall is energized, the heat is dissipated to heat the atomized material in the heating tube and the heat is transferred in the atomized material. The tubular heating element is widely used because of its large surrounding heating area and high heating uniformity. At present, the tubular heating element usually arranges the heating circuit on the outer surface of the heating tube. The heating circuit is mostly made by the resistance wire process, and the molding process is single. In addition, the heating is mainly based on heat conduction. There is a certain heat conduction distance between the heating layer and the atomized material, the heat is dissipated to a certain extent, and the heating efficiency is reduced to a certain extent. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an improved heating tube and a manufacturing method thereof and an aerosol generating device in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a method for manufacturing a heating pipe, comprising the following steps:

[0006] S1. Prepare a tubular blank, wherein the tubular blank comprises a base blank, an electric heating blank layer disposed inside the base blank, and an infrared radiation blank layer disposed inside the electric heating blank layer;

[0007] S2, sintering the tubular blank into shape.

[0008] In some embodiments, step S1 includes:

[0009] S101, preparing a sheet-like substrate blank by a tape casting process;

[0010] S102, preparing a sheet-shaped electric heating blank layer on the sheet-shaped base blank;

[0011] S103, preparing a sheet-shaped infrared radiation blank layer on the sheet-shaped electric heating blank layer;

[0012] S104, curling the sheet-like base blank, the sheet-like electric heating blank layer, and the sheet-like infrared radiation blank layer into a tube shape.

[0013] In some embodiments, the tubular blank further comprises a primer blank disposed between the base blank and the electric heating blank layer;

[0014] The step S1 comprises:

[0015] S111, preparing a sheet-like base layer body by a tape casting process;

[0016] S112, preparing a sheet-shaped electric heating blank layer on the sheet-shaped base layer blank;

[0017] S113, preparing a sheet-shaped infrared radiation blank layer on the sheet-shaped electric heating blank layer;

[0018] S114, curling the sheet-like base layer blank, the sheet-like electric heating blank layer, and the sheet-like infrared radiation blank layer into a tube;

[0019] S115, placing the base layer blank, the electric heating blank layer, and the infrared radiation blank layer that are curled into a tube into a mold and injecting an outer layer to form the base blank.

[0020] In some embodiments, the sheet-like base layer body is made of a high thermal resistance porous ceramic material, and the thickness of the sheet-like base layer body is 10-40 um.

[0021] In some embodiments, the tubular blank further includes a reflective blank layer and an insulating blank layer, and the reflective blank layer, the insulating blank layer, the electric heating blank layer, and the infrared radiation blank layer are sequentially arranged on the inner side of the tubular blank.

[0022] In some embodiments, step S1 includes:

[0023] S121, preparing a sheet-like substrate body by a tape casting process;

[0024] S122, preparing a sheet-shaped reflective blank layer on the sheet-shaped base blank;

[0025] S123, preparing a sheet-shaped insulating blank layer on the sheet-shaped reflective blank layer;

[0026] S124, preparing a sheet-shaped electric heating blank layer on the sheet-shaped insulating blank layer;

[0027] S125, preparing a sheet-shaped infrared radiation blank layer on the sheet-shaped electric heating blank layer;

[0028] S126, curling the sheet-like base blank, the sheet-like reflective blank layer, the sheet-like insulating blank layer, the sheet-like electric heating blank layer, and the sheet-like infrared radiation blank layer into a tube shape.

[0029] In some embodiments, step S1 includes:

[0030] S131, preparing a sheet-shaped reflective blank layer by a tape casting process;

[0031] S132, preparing a sheet-shaped insulating blank layer on the sheet-shaped reflective blank layer;

[0032] S133, preparing a sheet-shaped electric heating blank layer on the sheet-shaped insulating blank layer;

[0033] S134, preparing a sheet-shaped infrared radiation blank layer on the sheet-shaped electric heating blank layer;

[0034] S135, curling the sheet-shaped reflective blank layer, the sheet-shaped insulating blank layer, the sheet-shaped electric heating blank layer, and the sheet-shaped infrared radiation blank layer into a tube shape;

[0035] S136, placing the reflective blank layer, the insulating blank layer, the electric heating blank layer, and the infrared radiation blank layer that are curled into a tube into a mold for injection molding outer layer to form the base blank.

[0036] In some embodiments, the reflective blank layer is made of metal oxide slurry or powder with high reflectivity, and the insulating blank layer is made of non-conductive slurry or powder.

[0037] In some embodiments, the reflective blank layer is formed by casting or spraying.

[0038] In some embodiments, the thickness of the reflective blank layer is 10-200 um.

[0039] In some embodiments, the insulating blank layer is formed by casting, spraying or silk-screening.

[0040] In some embodiments, the thickness of the insulating blank layer is 5-40 um.

[0041] In some embodiments, the base body is made of a high thermal resistance porous ceramic material.

[0042] In some embodiments, in step S2, the sintering temperature is 600-1600 degrees Celsius.

[0043] In some embodiments, the electrothermal blank layer is made by screen printing or PVD deposition.

[0044] In some embodiments, the electric heating blank layer includes a conductive circuit and a heating film, and the resistivity of the conductive circuit is smaller than the resistivity of the heating film.

[0045] In some embodiments, the infrared radiation blank layer is made of at least one of Fe2O3, MnO2, Co2O3, ZrO2, SiO2, SiC, TiO2, Al2O3, CeO2, La2O3, MgO, cordierite, and perovskite.

[0046] In some embodiments, the thickness of the electric heating blank layer is 20-100 um, and the thickness of the infrared radiation blank layer is 10-200 um.

[0047] The present invention further provides a heating tube, which is manufactured by any of the above-mentioned manufacturing methods.

[0048] The present invention also provides an aerosol generating device, comprising any one of the heating tubes described above.

[0049] The implementation of the present invention has at least the following beneficial effects: the heating tube is integrally formed by sintering, with a simple structure and high reliability; the electric heating layer and the infrared radiation layer are arranged on the inner surface of the base tube, and the electric heating layer and the infrared radiation layer are in direct contact to stimulate radiation, which greatly improves the radiation heating ratio, shortens the heating conduction distance and radiation distance between the electric heating layer, the infrared radiation layer and the aerosol generating matrix, and improves the heating efficiency and heating uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0051] Figure 1 is a schematic diagram of the three-dimensional structure of the heating pipe in some embodiments of the present invention;

[0052] Figure 2 is a schematic cross-sectional structure diagram of a heating tube in a first embodiment of the present invention;

[0053] Figure 3 yes Figure 2 The schematic diagram of the exploded structure of the heating tube shown;

[0054] Figure 4-5 yes Figure 2 The schematic diagram of the structure of the heat pipe in the first manufacturing process shown;

[0055] Figure 6-7 yes Figure 2 The schematic diagram of the structure of the heat pipe in the second manufacturing process shown;

[0056] Figure 8 is a schematic diagram of the exploded structure of the heating tube in the second embodiment of the present invention;

[0057] Fig. 9 yes Figure 8 A schematic diagram of the cross-sectional structure of the heating tube shown;

[0058] Figure 10-11 yes Fig. 9 The schematic diagram of the structure of the heat pipe in the third manufacturing process shown;

[0059] Figure 12-13 yes Fig. 9 The schematic diagram of the structure of the heat pipe in the fourth manufacturing process shown;

[0060] Fig.14 Schematic diagram of the three-dimensional structure of an aerosol generating device in some embodiments of the present invention. DETAILED DESCRIPTION

[0061] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0062] like Figure 1-3 As shown, the heating tube 1 in the first embodiment of the present invention may include a base tube 11, an electric heating layer 14 disposed inside the base tube 11, an infrared radiation layer 15 disposed inside the electric heating layer 14, and two electrode leads 16 electrically connected to the electric heating layer 14. The heating tube 1 may be in a circular tube shape, and in other embodiments, it may also be in other shapes such as an elliptical tube shape, a square tube shape, etc.

[0063] The base tube 11 may be in a round tube shape and may be made of a high thermal resistance porous ceramic material such as porous diatomite, which has the function of heat insulation and insulation. The infrared radiation layer 15 may be made of at least one of Fe2O3, MnO2, Co2O3, ZrO2, SiO2, SiC, TiO2, Al2O3, CeO2, La2O3, MgO, cordierite, and perovskite. The thickness of the infrared radiation layer 15 may be 10-200um, preferably 10-80um.

[0064] The thickness of the electric heating layer 14 can be 20-100um, preferably 20-60um. The electric heating layer 14 may include a conductive circuit 141 arranged on the inner wall of the base tube 11 and a heating film 142 arranged on the inner wall of the base tube 11. The conductive circuit 141 is mainly used to form a suitable conductive track pattern to allocate the heating area as needed. The heating film 142 is mainly used to generate heat after power is turned on. The conductive circuit 141 and the heating film 142 can be made of different materials through processes such as silk screen printing or PVD deposition. Among them, the conductive circuit 141 can be made of a material with a lower resistivity and less heat, and the heating film 142 can be made of a material with a larger resistivity and more heat.

[0065] like Figure 4-5 As shown, the heating tube 1 can be manufactured by the following method:

[0066] S1, preparing a tubular blank 10;

[0067] S2, sintering the tubular blank 10.

[0068] The tubular blank 10 may include a tubular base blank 110, a tubular electric heating blank layer 140 disposed inside the tubular base blank 110, and a tubular infrared radiation blank layer 150 disposed inside the tubular electric heating blank layer 140. The tubular base blank 110, the tubular electric heating blank layer 140, and the tubular infrared radiation blank layer 150 respectively form a base tube 11, an electric heating layer 14, and an infrared radiation layer 15 after sintering. The sintering temperature may be 600-1600 degrees Celsius. The two electrode leads 16 may be deposited or welded on the outer end surfaces of both ends of the heating tube 1 by PVD before or after sintering.

[0069] Further, step S1 may include:

[0070] S101, preparing a sheet-like substrate blank 110 by a tape casting process, wherein the thickness of the sheet-like substrate blank 110 may be between 0.6 and 3 mm;

[0071] S102, preparing a sheet-shaped electric heating blank layer 140 on the sheet-shaped base blank 110 by screen printing or PVD deposition process;

[0072] S103, preparing a sheet-shaped infrared radiation blank layer 150 on the sheet-shaped electric heating blank layer 140 by screen printing, PVD deposition or tape casting process;

[0073] S104, curl the sheet-like substrate blank 110, the sheet-like electric heating blank layer 140, and the sheet-like infrared radiation blank layer 150 into a tube through the core shaft 170 to form a tubular substrate blank 110, a tubular electric heating blank layer 140, and a tubular infrared radiation blank layer 150 respectively, and make the tubular infrared radiation blank layer 150 located on the inner side.

[0074] like Figure 6-7 As shown, in another embodiment, the tubular blank 10 may further include a tubular lining layer 180 disposed between the tubular base blank 110 and the tubular electric heating blank layer 140. The tubular base blank 110 and the tubular lining layer 180 together form the base tube 11 after sintering.

[0075] The tubular blank 10 can also be prepared by the following method:

[0076] S111, preparing a thin sheet-like base layer blank 180 by tape casting process, the thickness of the sheet-like base layer blank 180 may be 10-40 μm;

[0077] S112, preparing a sheet-shaped electric heating blank layer 140 on the sheet-shaped base layer blank 180 by screen printing or PVD deposition process;

[0078] S113, preparing a sheet-shaped infrared radiation blank layer 150 on the sheet-shaped electric heating blank layer 140 by screen printing or PVD deposition or tape casting process;

[0079] S114, curling the sheet-like base layer blank 180, the sheet-like electric heating blank layer 140, and the sheet-like infrared radiation blank layer 150 into a tubular shape through the mandrel 170 to form a tubular base layer 180, a tubular electric heating blank layer 140, and a tubular infrared radiation blank layer 150, respectively, and making the tubular infrared radiation blank layer 150 located on the inner side;

[0080] S115, placing the tubular base layer blank 180, the tubular electric heating blank layer 140, and the tubular infrared radiation blank layer 150 into a mold for injection molding an outer layer to form a tubular base blank 110, and the thickness of the tubular base blank 110 can be 0.6-3 mm.

[0081] The method first casts a sheet-like bottom layer blank 180 as a bottom layer, so that the total thickness when curled into a tube is thinner and the curling and docking process is relatively easy to control.

[0082] Figure 8-9 The figure shows a heating tube 1 in a second embodiment of the present invention. Compared with the first embodiment, the heating tube 1 in this embodiment further includes a reflection layer 12 and an insulation layer 13. The reflection layer 12, the insulation layer 13, the electric heating layer 14, and the infrared radiation layer 15 are sequentially arranged on the inner side of the base tube 11.

[0083] The reflective layer 12 is arranged on the inner side wall of the base tube 11, and can be made of metal oxide slurry or powder with high reflectivity such as SnO2-based, In2O3-based, ZnO-based and composite doped materials, and the thickness of the reflective layer 12 can be between 10-200um. The insulating layer 13 is arranged between the reflective layer 12 and the electric heating layer 14 to insulate the reflective layer 12 from the electric heating layer 14. The insulating layer 13 can be made of non-conductive slurry or powder such as ZrO, SiO2, Al2O3, and the thickness can be 5-40um, preferably 5-20um.

[0084] like Figure 10-11 As shown, the heating tube 1 can be manufactured by the following method:

[0085] S1, preparing a tubular blank 10;

[0086] S2, sintering the tubular blank 10.

[0087] The tubular blank 10 may include a tubular base blank 110, a tubular reflective blank layer 120 disposed inside the tubular base blank 110, a tubular insulating blank layer 130 disposed inside the tubular reflective blank layer 120, a tubular electric heating blank layer 140 disposed inside the tubular insulating blank layer 130, and a tubular infrared radiation blank layer 150 disposed inside the tubular electric heating blank layer 140. The tubular base blank 110, the tubular reflective blank layer 120, the tubular insulating blank layer 130, the tubular electric heating blank layer 140, and the tubular infrared radiation blank layer 150 respectively form a base tube 11, a reflective layer 12, an insulating layer 13, an electric heating layer 14, and an infrared radiation layer 15 after sintering. The sintering temperature may be 600-1600 degrees Celsius.

[0088] Further, step S1 may include:

[0089] S121, preparing a sheet-like base body 110 by a tape casting process;

[0090] S122, preparing a sheet-shaped reflective blank layer 120 on the sheet-shaped base blank 110 by a casting or spraying process;

[0091] S123, preparing a sheet-shaped insulating blank layer 130 on the sheet-shaped reflective blank layer 120 by casting, spraying or screen printing;

[0092] S124, preparing a sheet-shaped electric heating blank layer 140 on the sheet-shaped insulating blank layer 130 by screen printing or PVD deposition process;

[0093] S125, preparing a sheet-shaped infrared radiation blank layer 150 on the sheet-shaped electric heating blank layer 140 by screen printing, PVD deposition or tape casting process;

[0094] S126. Curl the sheet-like base blank 110, the sheet-like reflective blank layer 120, the sheet-like insulating blank layer 130, the sheet-like electric heating blank layer 140, and the sheet-like infrared radiation blank layer 150 into a tube through a core shaft 170 to respectively form a tubular base blank 110, a tubular reflective blank layer 120, a tubular insulating blank layer 130, a tubular electric heating blank layer 140, and a tubular infrared radiation blank layer 150, and make the tubular infrared radiation blank layer 150 located on the inner side.

[0095] like Figure 12-13 As shown, the tubular blank 10 can also be prepared by the following method:

[0096] S131, preparing a sheet-shaped reflective blank layer 120 by a tape casting process;

[0097] S132, preparing a sheet-shaped insulating blank layer 130 on the sheet-shaped reflective blank layer 120 by casting, spraying or screen printing;

[0098] S133, preparing a sheet-shaped electric heating blank layer 140 on the sheet-shaped insulating blank layer 130 by screen printing or PVD deposition process;

[0099] S134, preparing a sheet-shaped infrared radiation blank layer 150 on the sheet-shaped electric heating blank layer 140 by screen printing or PVD deposition or casting process;

[0100] S135, rolling the sheet-shaped reflective blank layer 120, the sheet-shaped insulating blank layer 130, the sheet-shaped electric heating blank layer 140, and the sheet-shaped infrared radiation blank layer 150 into a tubular shape through the mandrel 170, so as to form a tubular reflective blank layer 120, a tubular insulating blank layer 130, a tubular electric heating blank layer 140, and a tubular infrared radiation blank layer 150 respectively;

[0101] S136 , placing the tubular reflective blank layer 120 , the tubular insulating blank layer 130 , the tubular electric heating blank layer 140 , and the tubular infrared radiation blank layer 150 into a mold for injection molding of an outer layer to form a tubular base blank 110 .

[0102] like Fig.14 As shown, the present invention also provides an aerosol generating device, which can be roughly in the shape of a square column and includes a shell 2, a heating tube 1 arranged in the shell 2, and a battery arranged in the shell 2 and electrically connected to the heating tube 1. The aerosol generating matrix 3 can be inserted into the shell 2 from the top of the shell 2 and extend into the heating tube 1. After the heating tube 1 is powered on and heated, the aerosol generating matrix 3 is baked and heated to form an aerosol that can be inhaled by the user. In some embodiments, the aerosol generating matrix 3 can be a cigarette. It can be understood that the aerosol generating device is not limited to a square column shape, and it can also be in other shapes such as a cylindrical shape.

[0103] The heating tube 1 of the present invention has at least the following advantages:

[0104] 1. The heating tube 1 is integrally formed by sintering, with a simple structure and high reliability;

[0105] 2. The electric heating layer 14 and the infrared radiation layer 15 are arranged on the inner surface of the base tube 11. The electric heating layer 14 and the infrared radiation layer 15 are in direct contact with each other to stimulate radiation, which greatly improves the radiation heating ratio, shortens the heating conduction distance and radiation distance between the electric heating layer 14, the infrared radiation layer 15 and the aerosol generating matrix 3, and improves the heating efficiency and heating uniformity;

[0106] 3. The reflective layer 12 is arranged in the base tube 11, and the radiation is directly reflected in the base tube 11, which reduces the radiation escaping to the outside of the base tube 11 and reduces the surface temperature of the heating tube 1, which is beneficial to improving the overall performance and user experience of the aerosol generating device, while reducing the radiation divergence range and improving the radiation utilization rate.

[0107] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0108] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A method for manufacturing a heating pipe, characterized in that: The following steps are involved: S1. preparing a tubular blank (10), the tubular blank (10) comprising a base blank (110), an electric heating blank layer (140) arranged inside the base blank (110), and an infrared radiation blank layer (150) arranged inside the electric heating blank layer (140); S2, sintering the tubular blank (10), The step S1 comprises: S101, preparing a sheet-like substrate blank (110) by a tape casting process; S102, preparing a sheet-shaped electric heating blank layer (140) on the sheet-shaped base blank (110); S103, preparing a sheet-shaped infrared radiation blank layer (150) on the sheet-shaped electric heating blank layer (140); S104, rolling the sheet-like base blank (110), the sheet-like electric heating blank layer (140), and the sheet-like infrared radiation blank layer (150) into a tube shape; Alternatively, the tubular blank (10) further comprises a base layer blank (180) disposed between the base blank (110) and the electric heating blank layer (140), and the step S1 comprises: S111, preparing a sheet-like base layer body (180) by a tape casting process; S112, preparing a sheet-shaped electric heating blank layer (140) on the sheet-shaped base layer blank (180); S113, preparing a sheet-shaped infrared radiation blank layer (150) on the sheet-shaped electric heating blank layer (140); S114, curling the sheet-like base layer blank (180), the sheet-like electric heating blank layer (140), and the sheet-like infrared radiation blank layer (150) into a tube shape; S115, placing the base layer blank (180), the electric heating blank layer (140), and the infrared radiation blank layer (150) that have been rolled into a tube into a mold and injecting an outer layer to form the base blank (110).

2. The manufacturing method according to claim 1, characterized in that: The sheet-like base layer blank (180) is made of a high thermal resistance porous ceramic material, and the thickness of the sheet-like base layer blank (180) is 10-40 um.

3. The manufacturing method according to claim 1, characterized in that: The tubular blank (10) further comprises a reflective blank layer (120) and an insulating blank layer (130), wherein the reflective blank layer (120), the insulating blank layer (130), the electric heating blank layer (140), and the infrared radiation blank layer (150) are sequentially arranged on the inner side of the tubular blank (10).

4. The manufacturing method according to claim 3, characterized in that: The step S1 comprises: S121, preparing a sheet-like base body (110) by a tape casting process; S122, preparing a sheet-shaped reflective blank layer (120) on the sheet-shaped base blank (110); S123, preparing a sheet-shaped insulating blank layer (130) on the sheet-shaped reflective blank layer (120); S124, preparing a sheet-shaped electric heating blank layer (140) on the sheet-shaped insulating blank layer (130); S125, preparing a sheet-shaped infrared radiation blank layer (150) on the sheet-shaped electric heating blank layer (140); S126, curling the sheet-like base blank (110), the sheet-like reflective blank layer (120), the sheet-like insulating blank layer (130), the sheet-like electric heating blank layer (140), and the sheet-like infrared radiation blank layer (150) into a tube shape.

5. The manufacturing method according to claim 3, characterized in that: The step S1 comprises: S131, preparing a sheet-shaped reflective blank layer (120) by a tape casting process; S132, preparing a sheet-shaped insulating blank layer (130) on the sheet-shaped reflective blank layer (120); S133, preparing a sheet-shaped electric heating blank layer (140) on the sheet-shaped insulating blank layer (130); S134, preparing a sheet-shaped infrared radiation blank layer (150) on the sheet-shaped electric heating blank layer (140); S135, curling the sheet-shaped reflective blank layer (120), the sheet-shaped insulating blank layer (130), the sheet-shaped electric heating blank layer (140), and the sheet-shaped infrared radiation blank layer (150) into a tube shape; S136, placing the reflective blank layer (120), the insulating blank layer (130), the electric heating blank layer (140), and the infrared radiation blank layer (150) that have been rolled into a tube into a mold for injection molding to form the base blank (110).

6. The manufacturing method according to claim 3, characterized in that: The reflective blank layer (120) is made of metal oxide slurry or powder with high reflectivity, and the insulating blank layer (130) is made of non-conductive slurry or powder.

7. The manufacturing method according to claim 3, characterized in that: The reflective blank layer (120) is formed by casting or spraying.

8. The manufacturing method according to claim 3, characterized in that: The thickness of the reflective blank layer (120) is 10-200 um.

9. The manufacturing method according to claim 3, characterized in that: The insulating blank layer (130) is formed by casting, spraying or silk-screen printing.

10. The manufacturing method according to claim 3, characterized in that: The thickness of the insulating blank layer (130) is 5-40 um.

11. The manufacturing method according to any one of claims 1 to 10, characterized in that: The base blank (110) is made of a high thermal resistance porous ceramic material.

12. The manufacturing method according to any one of claims 1 to 10, characterized in that: In the step S2, the sintering temperature of the tubular blank (10) is 600-1600 degrees Celsius.

13. The manufacturing method according to any one of claims 1 to 10, characterized in that: The electric heating blank layer (140) is made by silk screen printing or PVD deposition.

14. The manufacturing method according to any one of claims 1 to 10, characterized in that: The electric heating blank layer (140) comprises a conductive circuit (141) and a heating film (142), and the resistivity of the conductive circuit (141) is smaller than the resistivity of the heating film (142).

15. The manufacturing method according to any one of claims 1 to 10, characterized in that: The infrared radiation blank layer (150) is made of at least one of Fe2O3, MnO2, Co2O3, ZrO2, SiO2, SiC, TiO2, Al2O3, CeO2, La2O3, MgO, cordierite, and perovskite.

16. The manufacturing method according to any one of claims 1 to 10, characterized in that: The thickness of the electric heating blank layer (140) is 20-100 um, and the thickness of the infrared radiation blank layer (150) is 10-200 um.

17. A heating tube, characterized in that: The heating tube is manufactured by the manufacturing method according to any one of claims 1 to 16.

18. An aerosol generating device, characterized in that: Comprising the heating tube as claimed in claim 17.

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