Manufacturing method of heating component, heating device and heating smoking device

Abstract

The present invention discloses a method for manufacturing a heating component, a heating device, and a heating smoking device. The manufacturing method includes: providing a heat-conducting metal, and forming the heat-conducting metal into a first preset shape; covering the surface of the formed heat-conducting metal with a heat-conducting insulating layer to form a heat conductor, and the heat-conducting insulating layer includes a silicon carbide layer or an aluminum nitride layer. By firstly manufacturing a heat-conducting metal with good thermal conductivity into the shape of a heat conductor, and then covering the surface of the heat-conducting metal with a silicon carbide heat-conducting insulating layer or an aluminum nitride heat-conducting insulating layer, the heat conductor has a higher thermal conductivity coefficient. Therefore, the heating body can quickly heat the heat conductor to a preset temperature, so that the heat conductor and the heating body can heat the air and quickly increase the temperature, thereby improving the heating speed of the air and the uniformity of the heating, and the silicon carbide heat-conducting insulating layer or the aluminum nitride heat-conducting insulating layer can play a good insulating role, avoiding the problem of short circuit between the heating body and the heat conductor.

Description

Technical Field

[0001] The present invention relates to the technical field of heated smoking articles, and in particular to a method for manufacturing a heating component, a heating device and a heated smoking article. Background Art

[0002] Heat-not-burn tobacco products are considered revolutionary products in the tobacco industry. They have the characteristics of no open flame, no ash, no second-hand smoke, 90% harm reduction, and 90% taste of traditional cigarettes. Heat-not-burn tobacco products have built-in heating devices to achieve heating to between 200-300°C. Tobacco materials and atomizers release aerosols of nicotine, smoke and other flavor components in a low-temperature non-combustion state for users to inhale, reducing the intake of a large amount of harmful substances. The ambient temperature of tobacco materials is much lower than that of traditional cigarettes. There is no open flame or ash during the smoking process. It is an environmentally friendly way of smoking.

[0003] There are currently two mainstream heating methods: one is central heating, in which a heating circuit is set on a ceramic sheet or a ceramic needle, and then the needle is inserted from the bottom of the cigarette into the interior for heating. However, the heating element of this heating method is easy to break, and it can only be reused by replacing the heating device, which has high cost, and there are problems such as low heating efficiency, uneven heating, and slow heating rate. In particular, the temperature distribution is uneven, with high temperature in the lower section and low temperature in the upper section, resulting in local excessive temperature or local low temperature, causing the cigarette or other materials to not emit smoke, carbonize or burn, seriously affecting the smoking experience; the other is circumferential heating, which has the advantages of fast heating rate and relatively uniform heating, but it mainly relies on heat transfer, and the temperature in the contact area with the cigarette is high. Uneven heating often occurs in the center of the cigarette, which is also prone to carbonization or burning on the surface of the cigarette, affecting the smoking experience.

[0004] Cigarettes can be heated by air heating, and any area where the hot air flows can be heated, so that the cigarettes do not need to be in direct contact with the heating element, avoiding problems such as uneven heating, easy carbonization or burning of the cigarettes. The air is heated by the heating element and the hot air flows through the air net to the inside of the cigarette, thereby heating the cigarette. However, the heating speed of existing air-heating smoking devices is relatively slow, and the cigarettes need to be baked for a long time before they can produce smoke, which affects the user experience, and the heating element also has the risk of short circuit. Summary of the invention

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a method for manufacturing a heating component, a heating device, and a heating smoking device to solve the problems of slow heating speed and easy short circuit in the prior art air-heating smoking devices.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a method for manufacturing a heating component, the method comprising:

[0008] Providing a heat-conducting metal, and forming the heat-conducting metal into a first preset shape;

[0009] A heat-conducting insulating layer is covered on the surface of the formed heat-conducting metal to form a heat conductor, wherein the heat-conducting insulating layer includes a silicon carbide layer or an aluminum nitride layer.

[0010] Furthermore, the forming process of the heat-conducting metal includes carving, casting or stamping.

[0011] Furthermore, the material of the heat conductive metal includes aluminum alloy, tungsten copper alloy, copper or brass.

[0012] Furthermore, the method of covering the surface of the thermally conductive metal with a thermally conductive insulating layer comprises:

[0013] A heat-conducting insulating layer with a thickness of 10-20 μm is plated on the surface of the heat-conducting metal by a plasma electrostatic spraying or thermal spraying process;

[0014] Or, a chopped fiber mat or cloth strip of a heat-conducting insulating material is wound on the surface of the heat-conducting metal to a thickness of 0.08-0.1 mm;

[0015] Alternatively, a heat-conductive insulating wire is wound on the surface of the heat-conductive metal.

[0016] Furthermore, the heat conductor includes a heat pipe and a tapered tube arranged at one end of the heat pipe, the heat pipe has a first through hole passing through the heat pipe, the tapered tube has a second through hole passing through the tapered tube, and the second through hole is connected to the first through hole.

[0017] Furthermore, the heat conductor also includes an outer spiral heat-conducting fin connected to the outer wall of the heat-conducting pipe, and the outer spiral heat-conducting fin is wound around the outer wall of the heat-conducting pipe along the axial direction of the heat-conducting pipe; and / or, the heat conductor also includes an inner spiral heat-conducting fin connected to the inner wall of the heat-conducting pipe, and the inner spiral heat-conducting fin is arranged on the inner wall of the heat-conducting pipe along the axial direction of the heat-conducting pipe.

[0018] Furthermore, the manufacturing method further comprises:

[0019] A heating wire is provided, and the heating wire is formed into a second preset shape matching the heat conductor. The heating wire is wound around the surface of the heat conductor to form a heating element, and the heating element is used to heat the heat conductor.

[0020] Further, the heating element includes an outer spiral portion, which is wound around the outer surface of the heat pipe along the axial direction of the heat pipe; and / or the heating element includes an inner spiral portion, which is arranged on the inner surface of the heat pipe along the axial direction of the heat pipe.

[0021] The present application also provides a heating device, comprising a containing tube and a heating component, wherein the heating component is manufactured by the manufacturing method described above;

[0022] The accommodating tube has a first accommodating cavity and a second accommodating cavity which are interconnected, the first accommodating cavity is close to the air outlet end of the accommodating tube, and the second accommodating cavity is close to the air inlet end of the accommodating tube;

[0023] The heating component includes a heating element and a heat conductor, both of which are arranged in the second accommodating cavity. The heat conductor includes a heat-conducting pipe, an outer spiral heat-conducting fin connected to the outer wall of the heat-conducting pipe, and a tapered tube arranged at one end of the heat-conducting pipe. The heat-conducting pipe has a first through hole penetrating the heat-conducting pipe, and the tapered tube has a second through hole penetrating the tapered tube, the second through hole is connected to the first through hole, the outer spiral heat-conducting fin is wound around the outer surface of the heat-conducting pipe along the axial direction of the heat-conducting pipe, the outer wall of the outer spiral heat-conducting fin is in contact with the inner wall of the second accommodating cavity, and the tip of the tapered tube is away from the heat-conducting pipe and extends into the first accommodating cavity.

[0024] The present application also provides a heated smoking device, comprising the heating device as described above.

[0025] The beneficial effects of the present invention are as follows: by first making a heat-conducting metal with good thermal conductivity into the shape of a heat conductor, and then covering the surface of the heat-conducting metal with a silicon carbide thermal insulation layer or an aluminum nitride thermal insulation layer, the heat conductor has a higher thermal conductivity coefficient. Therefore, the heating element can quickly heat the heat conductor to a preset temperature, so that the heat conductor and the heating element can heat the air and quickly increase the temperature, thereby improving the heating speed and uniformity of the air, and the silicon carbide thermal insulation layer or the aluminum nitride thermal insulation layer can play a good insulating role, avoiding the problem of short circuit between the heating element and the heat conductor; in addition, the raw materials of the heat conductor are easily available, the manufacturing process is simple, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the process of manufacturing the heating component in the present invention;

[0027] Figure 2 It is a top view of the three-dimensional structure of the heating smoking device of the present invention;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the heating smoking device of the present invention when viewed from above;

[0029] Figure 4 is a schematic diagram of the longitudinal cross-section structure of the heating smoking device of the present invention;

[0030] Figure 5 It is a top view of the three-dimensional structure of the heat conductor in the present invention;

[0031] Figure 6 It is a bottom-up three-dimensional structural schematic diagram of the heat conductor in the present invention;

[0032] Figure 7 It is a top view of the three-dimensional structure of the heating element in the present invention. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the manufacturing method of the heating component and the heating device and the specific implementation method, structure, characteristics and effects of the heating smoking device proposed in the present invention in combination with the accompanying drawings and preferred embodiments as follows:

[0034] Figure 1 FIG. 1 is a schematic diagram of a method for manufacturing a heating component in the present invention. Figure 1 As shown, the present invention provides a method for manufacturing a heating device, the manufacturing method comprising:

[0035] Step S1: Heat-conducting metal, forming the heat-conducting metal into a first preset shape. The heat-conducting metal includes aluminum alloy, tungsten copper alloy, copper or brass and other metals with high thermal conductivity. The aluminum alloy is, for example, 6063 aluminum alloy, 7075 aluminum alloy or 7005 aluminum alloy. The heat-conducting metal can be formed into the first preset shape by a molding process such as engraving, casting or stamping. The base of the heat conductor 30 is formed by an integrated molding process, so that the heat conduction effect is better. Figure 5 and Figure 6 The overall shape of the heat conductor 30 is tubular, a spiral outer spiral heat conducting fin 32 is provided on the outer wall of the heat conducting tube 31, and a tapered tube 33 is provided at one end of the heat conducting tube 31. Of course, the shape and size of the heat conductor 30 can be adjusted according to actual needs, and are not limited thereto.

[0036] Step S2: Cover the surface of the heat-conducting metal after forming with a heat-conducting insulating layer to form a heat conductor 30, and the heat-conducting insulating layer includes a silicon carbide layer or an aluminum nitride layer, so that the heat conductor 30 has a high thermal conductivity and does not conduct electricity, which can avoid the short circuit problem of the heating element 20. Among them, a plasma electrostatic spraying or thermal spraying process can be used to plate a heat-conducting insulating layer with a thickness of 10-20μm on the surface of the heat-conducting metal, that is, a silicon carbide coating or an aluminum nitride coating is formed on the surface of the heat-conducting metal. Of course, short-cut fiber felt or cloth strips of heat-conducting insulating material can also be made, and then wrapped on the surface of the heat-conducting metal with a thickness of 0.08-0.1mm. Alternatively, a heat-conducting insulating wire (i.e., silicon carbide wire or aluminum nitride wire) can be used to wrap on the surface of the heat-conducting metal.

[0037] Step S3: Provide a heating wire, and form the heating wire into a second preset shape matching the heat conductor 30. The heating wire is wound around the surface of the heat conductor 30 to form the heating body 20, and the heating body 20 is used to heat the heat conductor 30. The heating wire can be carbon fiber wire, iron-chromium-aluminum wire, tungsten alloy wire, nickel-chromium alloy wire, titanium wire, stainless steel wire, etc. The length and wire diameter of the heating wire are controlled to ensure that the resistance range of the heating wire is 0.3-1 ohm. Specifically, refer to Figure 7 The heating element 20 is spiral in shape as a whole, and specifically includes an outer spiral portion 21 and a straight portion 22, and the top of the outer spiral portion 21 is electrically connected to the top of the straight portion 22. Of course, the specific shape of the heating element 20 needs to be set according to the formation of the heat conductor 30, and is not limited thereto.

[0038] Further, refer to Figure 2 , and then provide a receiving tube 10, an air inlet pipe 40 and a connecting tube 50. The heating element 20 is wound around the outer wall of the heat conductor 30, and then the heat conductor 30 and the heating element 20 are loaded into the second receiving cavity 102 of the receiving tube 10. Then the top end of the connecting tube 50 is butted with the bottom end of the receiving tube 10, and the bottom end of the connecting tube 50 is butted with the top end of the air inlet pipe 40, and finally a heating device is formed.

[0039] Embodiment 1

[0040] The heat-conducting metal of 6063 aluminum alloy is formed into a first preset shape by mechanical processing; a 10μm silicon carbide coating is plated on the surface of the formed heat-conducting metal by plasma electrostatic spraying or thermal spraying; a 0.5mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wound around the surface of the high thermal conductivity and insulating silicon carbide coating. At a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 352°C after heating for 15s.

[0041] Embodiment 2

[0042] The thermal conductive metal of tungsten copper alloy is mechanically processed to form the thermal conductive metal into a first preset shape; a 10μm silicon carbide coating is plated on the surface of the formed thermal conductive metal by plasma electrostatic spraying or thermal spraying; a 0.5mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wound around the surface of the high thermal conductivity and insulating silicon carbide coating. At a rated power of 40W, the temperature at the root of the test thermal conductor 30 rises to 303°C after heating for 15s.

[0043] Embodiment 3

[0044] The heat-conducting metal of copper is mechanically processed to form the heat-conducting metal into a first preset shape; a 10μm silicon carbide coating is plated on the surface of the heat-conducting metal after forming by plasma electrostatic spraying or thermal spraying; a 0.5mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wound around the surface of the high thermal conductivity and insulating silicon carbide coating. At a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 381°C after heating for 15s.

[0045] Embodiment 4

[0046] The heat-conducting metal of brass is mechanically processed to form the heat-conducting metal into a first preset shape; a 15μm silicon carbide coating is plated on the surface of the heat-conducting metal after forming by plasma electrostatic spraying or thermal spraying; a 0.5mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wound around the surface of the high thermal conductivity and insulating silicon carbide coating. At a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 193°C after heating for 15s.

[0047] Embodiment 5

[0048] The heat-conducting metal of 6063 aluminum alloy is formed into a first preset shape by mechanical processing; a 10μm aluminum nitride coating is plated on the surface of the formed heat-conducting metal by plasma electrostatic spraying or thermal spraying; a 0.5mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wrapped around the surface of the high thermal conductivity and insulating aluminum nitride coating. At a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 364°C after heating for 15s.

[0049] Embodiment 6

[0050] The heat-conducting metal of 6063 aluminum alloy is formed into a first preset shape by mechanical processing; firstly, the silicon carbide chopped fiber felt or cloth strip is wound on the surface of the heat-conducting metal with a thickness of 0.1mm; and the iron-chromium-aluminum heating wire with a diameter of 0.5mm and a resistance of 0.5 ohms is wound on the surface of the high thermal conductivity and insulating silicon carbide layer. At a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 306℃ after heating for 15s.

[0051] Embodiment 7

[0052] The heat-conducting metal of 6063 aluminum alloy is mechanically processed to form the heat-conducting metal into a first preset shape; firstly, a silicon carbide wire is wound on the surface of the heat-conducting metal with a thickness of 0.08 mm; and a 0.5 mm diameter, 0.5 ohm iron-chromium-aluminum heating wire is wound on the surface of the high thermal conductivity and insulating silicon carbide layer. Under a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 296°C after heating for 15 seconds.

[0053] Embodiment 8

[0054] The heat-conducting metal of 7075 aluminum alloy is mechanically processed to form the heat-conducting metal into a first preset shape; firstly, an aluminum nitride wire is wound on the surface of the heat-conducting metal with a thickness of 0.08 mm; and an iron-chromium-aluminum heating wire with a diameter of 0.5 mm and a resistance of 0.5 ohms is wound on the surface of the high thermal conductivity and insulating aluminum nitride layer. Under a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 258°C after heating for 15 seconds.

[0055] Embodiment 9

[0056] The heat-conducting metal of 7005 aluminum alloy is mechanically processed to form the heat-conducting metal into a first preset shape; firstly, an aluminum nitride wire is wound on the surface of the heat-conducting metal with a thickness of 0.08 mm; and an iron-chromium-aluminum heating wire with a diameter of 0.5 mm and a resistance of 0.5 ohms is wound on the surface of the high thermal conductivity and insulating aluminum nitride layer. Under a rated power of 40W, the temperature at the root of the test heat conductor 30 rises to 242°C after heating for 15 seconds.

[0057] Comparative Example 1

[0058] The aluminum oxide is formed into a first preset shape by machining the aluminum oxide; an iron-chromium-aluminum heating wire with a diameter of 0.5 mm and a resistance of 0.5 ohms is wound on the surface of the aluminum oxide. Under a rated power of 40 W, the temperature at the root of the test heat conductor 30 is heated to 168° C. for 15 seconds.

[0059] The test results are shown in the following table:

[0060]

[0061] It can be seen from the examples 1 to 3 in the above table that the thermal conductive metals of different materials will have greatly different thermal conductive effects, but the existing and prior art use of aluminum oxide, both have good thermal conductive effects; it can be seen from the examples 1 and 5, 6 and 7 in the above table that different materials, i.e., thermal conductive insulating layers of different thicknesses, will also affect the thermal conductivity of the thermal conductor 30. In summary, by making the base of the thermal conductor 30 of a metal with good thermal conductivity and covering the surface with a thinner silicon carbide thermal conductive insulating layer or an aluminum nitride thermal conductive insulating layer, the thermal conductor 30 not only has a good insulation effect, avoiding the problem of short circuit between the heating element 20 and the thermal conductor 30, but also the thermal conductor 30 has a higher thermal coefficient, its temperature rises faster, the thermal conductive effect is better, the cost is low, the raw materials are easy to obtain, and the molding process is simple.

[0062] Figure 2 It is a top view of the three-dimensional structure of the heating smoking device of the present invention. Figure 3 It is a schematic diagram of the three-dimensional structure of the heating smoking device in the present invention when viewed from above. Figure 4 It is a schematic diagram of the longitudinal cross-section structure of the heating smoking device in the present invention. Figure 5 It is a top view of the three-dimensional structure of the heat conductor in the present invention. Figure 6 It is a bottom-up stereoscopic structural schematic diagram of the heat conductor in the present invention. Figure 7 It is a top view of the three-dimensional structure of the heating element in the present invention.

[0063] like Figures 2 to 4 As shown, the present invention also provides a heating smoking device, including a housing 200, a battery 300, a circuit board and a heating device. The heating device and the battery 300 are both electrically connected to the circuit board, the battery 300 is used to provide electrical energy to the heating device, and the circuit board is used to control the working state of the heating device. The heating device is arranged in the housing as a whole, but the air outlet end of the heating device extends out of the outer wall of the housing 200. The bottom of the housing 200 is provided with an air inlet 201, and the air inlet end of the heating device is connected to the air inlet 201. The battery 300 and the circuit board are both arranged in the housing 200 to protect the battery 300 and the circuit board. When in use, a cigarette is placed in the first accommodating cavity 101 of the heating device, the circuit board controls the battery 300 to power the heating device, the heating device heats up and heats the cigarette, and the tobacco material and the atomizer release nicotine, smoke and other flavor components in a low-temperature non-combustion state. Aerosol for users to inhale. As for other specific structures of the heating smoking device that heats without burning, reference can be made to the prior art, which will not be repeated here.

[0064] like Figures 4 to 7 As shown, the present invention also provides a heating device, which is used for heating the smoking device as described above. The heating device comprises a containing tube 10 and a heating component, and the heating component is manufactured by the manufacturing method as described above.

[0065] The heating component includes a heating element 20 and a heat conductor 30. The housing tube 10 has a first housing cavity 101 and a second housing cavity 102 which are interconnected. The first housing cavity 101 is close to the air outlet end of the housing tube 10, and the second housing cavity 102 is close to the air inlet end of the housing tube 10. The heating element 20 and the heat conductor 30 are both arranged in the second housing cavity 102. The heating element 20 is in contact with the heat conductor 30 and is used to heat the heat conductor 30. The heat conductor 30 includes a heat pipe 31 and an outer spiral heat conducting fin 32 connected to the outer wall of the heat pipe 31. The heat pipe 31 has a first through hole 311 penetrating the heat pipe 31. The outer spiral heat conducting fin 32 is wound around the outer wall of the heat pipe 31 along the axial direction of the heat pipe 31.

[0066] The present application arranges an outer spiral heat-conducting fin 32 on the outer wall of the heat-conducting pipe 31. The outer spiral heat-conducting fin 32 limits the gap between the heat-conducting pipe 31 and the containing tube 10 to form a spiral air passage, which can not only increase the contact area with the air, but also increase the time for heating the air, so that the air can be heated quickly, thereby improving the heating speed and the uniformity of heating.

[0067] Furthermore, an air-permeable net 11 is provided in the receiving tube 10, and the air-permeable net 11 is located between the first receiving chamber 101 and the second receiving chamber 102, so as to separate the pipe of the receiving tube 10 into the first receiving chamber 101 and the second receiving chamber 102. The air-permeable net 11 can prevent the cigarette residue in the first receiving chamber 101 from falling into the second receiving chamber 102 and contacting the heating element 20, thereby causing carbonization or burning, etc., and affecting the smoking taste.

[0068] Furthermore, a conical tube 33 is provided at one end of the heat conducting tube 31, the tip of the conical tube 33 faces the end away from the heat conducting tube 31, and the tip of the conical tube 33 passes through the gas mesh 11 and extends into the first accommodation cavity 101. The conical tube 33 has a second through hole 331 penetrating the conical tube 33, and the second through hole 331 is connected to the first through hole 311. When in use, the tip of the conical tube 33 can be inserted into the bottom of the cigarette, and the gas enters the second accommodating chamber 102 from the air inlet 201. The heating element 20 and the heat conductor 30 in the second accommodating chamber 102 heat the gas, thereby forming a hot air flow between the first through hole 311 of the heat conductor 30 and the outer wall of the heat conductor 30 and the inner wall of the accommodating tube 10. The hot air flow in the first through hole 311 can heat the central part of the cigarette through the conical tube 33, and the hot air flow in the spiral airway formed between the outer wall of the heat conductor 30 and the inner wall of the accommodating tube 10 heats the periphery of the cigarette, so that the cigarette can be heated evenly.

[0069] Furthermore, the outer wall of the outer spiral heat-conducting fin 32 contacts the inner wall of the second accommodating cavity 102, so that there is no gap between the outer wall of the outer spiral heat-conducting fin 32 and the inner wall of the second accommodating cavity 102, thereby preventing the hot air flow from directly flowing into the first accommodating cavity 101, thereby reducing the heating effect on the air flow.

[0070] In this embodiment, Figure 4 and Figure 7 As shown, the heating element 20 includes an outer spiral portion 21 and a straight portion 22. The outer spiral portion 21 is wound around the outer wall of the heat-conducting tube 31 along the axial direction of the heat-conducting tube 31. The straight portion 22 is located in the first through hole 311 and extends along the axial direction of the heat-conducting tube 31. The top end of the outer spiral portion 21 is electrically connected to the top end of the straight portion 22.

[0071] Furthermore, the heating element 20 includes a first electrode 23 and a second electrode 24, one of which is a positive electrode and the other is a negative electrode. The top of the first electrode 23 is electrically connected to the bottom of the outer spiral portion 21, and the top of the second electrode 24 is electrically connected to the bottom of the straight portion 22. The battery 300 of the heating device applies voltage to the heating element 20 through the first electrode 23 and the second electrode 24.

[0072] Furthermore, the outer spiral heat conducting fins 32 and the outer spiral portion 21 are both wound multiple times on the outer wall of the heat conducting tube 31. Preferably, the outer spiral heat conducting fins 32 and the outer spiral portion 21 are wound the same number of times on the outer wall of the heat conducting tube 31, that is, there is one circle of the outer spiral portion 21 between two adjacent circles of the outer spiral heat conducting fins 32, and there is one circle of the outer spiral heat conducting fins 32 between two adjacent circles of the outer spiral portion 21. In this embodiment, Figure 4 As shown, there is a gap between the outer spiral portion 21 and the outer spiral heat conducting fin 32. Of course, in other embodiments, the surfaces of the outer spiral portion 21 and the outer spiral heat conducting fin 32 may also contact each other, thereby increasing the heating effect of the outer spiral heat conducting fin 32.

[0073] In other embodiments, the heat conductor 30 also includes an inner spiral heat-conducting fin connected to the inner wall of the heat-conducting tube 31, and the inner spiral heat-conducting fin is arranged on the inner wall of the heat-conducting tube 31 along the axial direction of the heat-conducting tube 31, so that the inner spiral heat-conducting fin limits the first through hole 311 to form a spiral airway, and in the first through hole 311, the contact area with the air can also be increased, and the time for heating the air can also be increased, so that the air in the first through hole 311 can be quickly heated up, thereby improving the heating speed. The heating element 20 also includes an inner spiral portion, and the inner spiral portion is arranged on the inner wall of the heat-conducting tube 31 along the axial direction of the heat-conducting tube 31, that is, the straight strip portion 22 is replaced by the inner spiral portion. Through the cooperation between the outer spiral heat-conducting fin 32 and the inner spiral heat-conducting fin and the outer spiral portion 21 and the inner spiral portion, the heating speed and uniformity of the air can be greatly improved.

[0074] In this embodiment, the heating device further includes an air inlet pipe 40 and a connecting pipe 50. The top end of the connecting pipe 50 is connected to the bottom end of the receiving pipe 10, the bottom end of the connecting pipe 50 is connected to the top end of the air inlet pipe 40, and the bottom end of the air inlet pipe 40 is connected to the air inlet hole 201 on the shell 200. Since the diameters of the receiving pipe 10 and the air inlet pipe 40 are different, the receiving pipe 10 and the air inlet pipe 40 cannot be directly connected, so the connecting pipe 50 is used to connect the receiving pipe 10 and the air inlet pipe 40. The inner diameter of the top end of the connecting pipe 50 is slightly larger than or equal to the outer diameter of the receiving pipe 10, and the outer diameter of the bottom end of the connecting pipe 50 is slightly smaller than or equal to the inner diameter of the air inlet pipe 40. Of course, the inner diameter of the top end of the connecting pipe 50 may also be slightly larger than or equal to the inner diameter of the air inlet pipe 40, and the outer diameter of the bottom end of the connecting pipe 50 may also be slightly smaller than or equal to the outer diameter of the receiving pipe 10.

[0075] In this document, the directional words such as up, down, left, right, front, and back are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this document are only used to distinguish names and are not used to limit quantity and order.

[0076] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A heated smoking device, characterized in that: It comprises a heating device, the heating device comprising a containing tube (10) and a heating component; The accommodating tube (10) comprises a first accommodating chamber (101) and a second accommodating chamber (102) which are interconnected, wherein the first accommodating chamber (101) is close to an air outlet end of the accommodating tube (10), and the second accommodating chamber (102) is close to an air inlet end of the accommodating tube (10); The heating component comprises a heating element (20) and a heat conductor (30), wherein the heating element (20) and the heat conductor (30) are both arranged in the second accommodating cavity (102), wherein the heat conductor (30) comprises a heat conducting pipe (31), an outer spiral heat conducting fin (32) connected to the outer wall of the heat conducting pipe (31), an inner spiral heat conducting fin connected to the inner wall of the heat conducting pipe (31), and a tapered pipe (33) arranged at one end of the heat conducting pipe (31), wherein the heat conducting pipe (31) has a first through hole (311) penetrating the heat conducting pipe (31), and the tapered pipe (33) has a first through hole (311) penetrating the tapered pipe (31). The conical tube (33) is provided with a second through hole (331), the second through hole (331) is connected to the first through hole (311), the outer spiral heat-conducting fin (32) is wound around the outer surface of the heat-conducting tube (31) along the axial direction of the heat-conducting tube (31), the outer wall of the outer spiral heat-conducting fin (32) is in contact with the inner wall of the second accommodating cavity (102), the inner spiral heat-conducting fin is arranged on the inner wall of the heat-conducting tube (31) along the axial direction of the heat-conducting tube (31), and the tip of the conical tube (33) is away from the heat-conducting tube (31) and extends into the first accommodating cavity (101); The manufacturing method of the heating component comprises: Providing a heat-conducting metal, and forming the heat-conducting metal into a first preset shape; A heat-conducting insulating layer is covered on the surface of the formed heat-conducting metal to form a heat-conducting body (30), wherein the heat-conducting insulating layer comprises a silicon carbide layer.

2. The heating smoking device according to claim 1, characterized in that: The forming process of the heat conductive metal includes carving, casting or stamping.

3. The heating smoking device according to claim 1, characterized in that: The material of the heat conductive metal includes aluminum alloy, tungsten copper alloy, copper or brass.

4. The heating smoking device according to claim 1, characterized in that: The method of covering the surface of the heat-conducting metal with a heat-conducting insulating layer comprises: A heat-conducting insulating layer with a thickness of 10-20 μm is plated on the surface of the heat-conducting metal by a plasma electrostatic spraying or thermal spraying process; Or, a chopped fiber mat or cloth strip of a heat-conducting insulating material is wound on the surface of the heat-conducting metal to a thickness of 0.08-0.1 mm; Alternatively, a heat-conductive insulating wire is wound on the surface of the heat-conductive metal.

5. The heated smoking article according to any one of claims 1 to 4, characterized in that: The production method further comprises: A heating wire is provided, the heating wire is formed into a second preset shape matching the heat conductor (30), the heating wire is wound around the surface of the heat conductor (30) to form a heating element (20), and the heating element (20) is used to heat the heat conductor (30).

6. The heating smoking device according to claim 5, characterized in that: The heating element (20) comprises an outer spiral portion (21), wherein the outer spiral portion (21) is wound around the outer surface of the heat-conducting tube (31) along the axial direction of the heat-conducting tube (31); and / or the heating element (20) comprises an inner spiral portion, wherein the inner spiral portion is arranged on the inner surface of the heat-conducting tube (31) along the axial direction of the heat-conducting tube (31).

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