Heating tube and aerosol generating device

Abstract

The invention discloses a heating tube and an aerosol generating device. The heating pipe comprises a base body, a containing cavity used for containing at least part of the aerosol generating product is defined in the base body, the base body at least comprises a first section and a second section which are adjacently arranged in the axial direction, and the first section is close to the top end of the base body; the conductive film layer is arranged on at least partial surface of the substrate; the first electrode comprises a first longitudinal electrode arranged in the axial direction of the base body and at least one first transverse electrode extending from the first longitudinal electrode in the circumferential direction of the base body; the second electrode comprises a second longitudinal electrode arranged in the axial direction of the base body and at least one second transverse electrode extending from the second longitudinal electrode in the circumferential direction of the base body; the first transverse electrode and the second transverse electrode which are adjacently arranged are electrically connected with the conductive film layer between the first transverse electrode and the second transverse electrode to form a heating section; the heating speed of the first section is higher than that of the second section. The heating pipe can ensure the amount of aerosol sucked by the first several mouths and reduce the suction temperature of the first several mouths at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of heat-without-combustion aerosol generation, and in particular to a heating tube and an aerosol generating device. Background Art

[0002] Smoking articles such as cigarettes and cigars burn tobacco to produce smoke during use. Attempts have been made to provide alternatives to these tobacco-burning articles by products that release compounds without burning. Examples of such products are so-called heat-not-burn products, which release compounds by heating tobacco rather than burning it.

[0003] The heating tubes of existing heat-not-burn products generally have the problem of burning the mouth during the first few puffs of smoke. Although there may be some technologies that can solve the problem of burning the mouth during the first few puffs of smoke by controlling the heating temperature, the structure is complex and requires additional external electrodes, which is costly. At the same time, the control circuit and control logic are also complex and costly. Summary of the invention

[0004] One embodiment of the present application provides a heating tube and an aerosol generating device.

[0005] In one aspect, the present application provides a heating tube, the heating tube comprising:

[0006] A substrate, wherein a receiving cavity is defined in the substrate, the receiving cavity is used to receive at least part of the aerosol generating product, and the aerosol generated by the aerosol generating product after being heated flows out from the top of the substrate, the substrate at least comprising a first section and a second section adjacently arranged in the axial direction, the first section being arranged close to the top of the substrate;

[0007] A conductive film layer is disposed on at least a partial surface of the substrate;

[0008] A first electrode, comprising a first longitudinal electrode arranged along the axial direction of the substrate, and at least one first transverse electrode, wherein the first transverse electrode extends from the first longitudinal electrode along the circumferential direction of the substrate;

[0009] A second electrode, comprising a second longitudinal electrode arranged along the axial direction of the substrate, and at least one second transverse electrode, wherein the second transverse electrode extends from the second longitudinal electrode along the circumferential direction of the substrate;

[0010] The first lateral electrode and the second lateral electrode disposed adjacent to each other are electrically connected to the conductive film layer therebetween to form a heating section;

[0011] Wherein, the heating rate of the first section is greater than the heating rate of the second section.

[0012] In some embodiments, the first section includes a first heating section, and the second section includes a second heating section. Currents of the first heating section and the second heating section flow in the conductive film layer between the first lateral electrode and the second lateral electrode, causing the first heating section and the second heating section to generate heat.

[0013] In some embodiments, the length L1 of the first heating segment along the axial direction is smaller than the length L2 of the second heating segment along the axial direction.

[0014] In some embodiments, L2 is 1.5 to 2 times greater than L1.

[0015] In some embodiments, the length of the first heating section along the axial direction is 5 to 15 mm.

[0016] In some embodiments, the first lateral electrode or the second lateral electrode disposed between the first heating segment and the second heating segment is a common electrode, and the common electrode is connected to the conductive film layer of the first heating segment and the conductive film layer of the second heating segment respectively; or

[0017] The first transverse electrode and the second transverse electrode disposed between the first heating segment and the second heating segment are spaced apart from each other so as to insulate the first transverse electrode from the second transverse electrode.

[0018] In some embodiments, the substrate also includes a third segment arranged adjacent to the second segment, the third segment includes a third heating segment, and the current of the third heating segment flows in the conductive film layer between the first lateral electrode and the second lateral electrode, causing the third heating segment to generate heat.

[0019] In some embodiments, the relationship among the length L1 of the first heating segment along the axial direction, the length L2 of the second heating segment along the axial direction, and the length L3 of the third heating segment along the axial direction is as follows: L1<L3<L2.

[0020] In some embodiments, the first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat;

[0021] Among them, one of the first transverse electrode and the second transverse electrode of the first heating section is a wide electrode, and the other is a narrow electrode, and the wide electrode is arranged in the second section. (The wide electrode and the narrow electrode are not specified here, for fear that the description is too complicated, and the specific explanation can be given in the specification)

[0022] In some embodiments, the substrate further includes a third section disposed adjacent to the second section, the third section includes a third heating segment, and the wide electrode is a common electrode between the first heating segment and the third heating segment.

[0023] In some embodiments, the wide electrode has an axial length of 2 to 10 mm.

[0024] In some embodiments, the conductive film layer is continuously disposed in the axial direction.

[0025] In some embodiments, the first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat;

[0026] Wherein, the second section is not provided with the conductive film layer.

[0027] In some embodiments, the first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat;

[0028] The conductive film layer is disposed discontinuously in the axial direction, and the second section is a discontinuous area of ​​the conductive film layer.

[0029] In some embodiments, the first transverse electrodes and the second transverse electrodes are alternately arranged in the axial direction.

[0030] In some embodiments, the first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat;

[0031] A conductive film layer is disposed on the second section, and two of the first transverse electrodes or two of the second transverse electrodes are also disposed thereon, and the conductive film layer is respectively connected to the two of the first transverse electrodes or the two of the second transverse electrodes.

[0032] In some embodiments, the substrate also includes a third segment arranged adjacent to the second segment, the third segment includes a third heating segment, and the current of the third heating segment flows in the conductive film layer between the first lateral electrode and the second lateral electrode, causing the third heating segment to generate heat.

[0033] In some embodiments, starting from the top of the substrate, the first transverse electrode and the second transverse electrode are sequentially arranged in the axial direction as follows:

[0034] a first horizontal electrode, a second horizontal electrode, a second horizontal electrode and a first horizontal electrode; or

[0035] The second transverse electrode, the first transverse electrode and the first transverse electrode and the second transverse electrode.

[0036] In some embodiments, the conductive film layer is continuously disposed in the axial direction.

[0037] In some embodiments, the first longitudinal electrode and the second longitudinal electrode are spaced apart from the conductive film layer so as to insulate the first longitudinal electrode, the second longitudinal electrode from the conductive film layer.

[0038] In some embodiments, the first longitudinal electrode and the second longitudinal electrode are respectively disposed at two bisecting points of the substrate along the circumferential direction.

[0039] In some embodiments, the circumferential length of the first longitudinal electrode and the second longitudinal electrode is 1 to 5 mm; or, the axial length of the first transverse electrode and the second transverse electrode is 0.5 to 2 mm; or, the circumferential length of the interval between the longitudinal electrode and the infrared coating is 0.2 to 2 mm.

[0040] A heating tube, comprising:

[0041] A substrate, wherein a receiving cavity is defined in the substrate, the receiving cavity is used to receive at least part of the aerosol generating product, and the aerosol generated by the aerosol generating product after being heated flows out from the top of the substrate, the substrate at least comprising a first section and a second section adjacently arranged in the axial direction, the first section being arranged close to the top of the substrate;

[0042] The base body is provided with a plurality of heating sections along the axial direction;

[0043] A conductive film layer is provided at each of the heating segments, and the current of the conductive film layer flows along the axial direction to make the heating segment generate heat;

[0044] Wherein, the temperature of the thermal field of the first section is higher than the temperature of the thermal field of the second section.

[0045] An aerosol generating device comprises the heating tube as described above, and also comprises a power source, wherein the power source is used to supply power to the heating tube.

[0046] The heating tube reduces the resistance of the heating section in the heating tube and increases the heating rate of the heating section by setting the first electrode and the second electrode, especially the first transverse electrode and the second transverse electrode, and the heating section. The heating rate of the first section near the top of the substrate is set to be greater than the heating rate of the second section, so that the temperature of the upper section of the heating tube in the early stage of the heating stage is greater than that of the middle and lower sections. After the cigarette is inserted, the tobacco near the upper section of the heating tube can quickly reach the atomization temperature, ensuring the amount of smoke in the first few puffs. The tobacco near the middle and lower sections heats up slowly, which can effectively slow down the formation and upward diffusion of water vapor in the middle and lower sections of the tobacco, and reduce the temperature of the smoke in the first few puffs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0048] Figure 1 This is a schematic diagram of the structure of a heating tube in one embodiment of the present application;

[0049] Figure 2 yes Figure 1 A schematic diagram of the structure from another perspective of the structure shown;

[0050] Figure 3 This is a schematic diagram of the structure of a heating tube in one embodiment of the present application;

[0051] Figure 4 yes Figure 3 A schematic diagram of the structure from another perspective of the structure shown;

[0052] Figure 5 This is a schematic diagram of the structure of a heating tube in one embodiment of the present application;

[0053] Figure 6 yes Figure 5 A schematic diagram of the structure from another perspective of the structure shown;

[0054] Figure 7 This is a schematic diagram of the structure of a heating tube in one embodiment of the present application;

[0055] Figure 8 yes Figure 7 A schematic diagram of the structure from another perspective of the structure shown;

[0056] Fig. 9 It is a schematic structural diagram of an aerosol generating device in one embodiment of the present application.

[0057] In the figure:

[0058] 100. Heating tube; 101. Aerosol generating product;

[0059] 110, base; 111, receiving chamber; 112, first section; 113, second section; 114, third section; 115, fourth section; 116, fifth section;

[0060] 120, a first electrode; 121, a first longitudinal electrode; 122, a first transverse electrode;

[0061] 130, a second electrode; 131, a second longitudinal electrode; 132, a second transverse electrode;

[0062] 140. Conductive film layer;

[0063] 10. Aerosol generating device;

[0064] 200. Power supply. DETAILED DESCRIPTION

[0065] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments are only used to explain the present application, rather than to limit the present application. In addition, it should be noted that, for the sake of ease of description, only partial structures related to the present application are shown in the accompanying drawings, rather than all structures.

[0066] The present application embodiment provides a heating tube. Figure 1 and Figure 2 As shown, the heating tube 100 includes a substrate 110, a first electrode 120, a second electrode 130 and a conductive film layer 140. The substrate 110 is generally cylindrical, and a receiving cavity 111 is defined in the substrate 110. The receiving cavity 111 is used to receive at least part of the aerosol generating article 101. The aerosol generating article 101 is a substrate capable of releasing volatile compounds that can form an aerosol, such as a cigarette. The conductive film layer 140 is disposed on at least a partial surface of the substrate.

[0067] Combination Figure 1 and Fig. 9 After the aerosol generating article 101 is heated, the generated aerosol flows out from the top of the substrate 110. Figure 1 As shown, the base 110 includes at least a first section 112 and a second section 113 adjacent to each other in the axial direction. The first section 112 is disposed near the top of the base 110 , and the second section 113 is axially located below the first section 112 and adjacent to the first section 112 .

[0068] like Figure 1 As shown, the first electrode 120 includes a first longitudinal electrode 121 and at least one first transverse electrode 122. The first longitudinal electrode 121 is disposed along the axial direction of the substrate 110, and the first transverse electrode 122 extends from the first longitudinal electrode 121 along the circumferential direction of the substrate 110.

[0069] like Figure 2 As shown, the second electrode 130 includes a second longitudinal electrode 131 and at least one second transverse electrode 132. The second longitudinal electrode 131 is disposed along the axial direction of the substrate 110, and the second transverse electrode 132 extends from the second longitudinal electrode 131 along the circumferential direction of the substrate 110.

[0070] like Figure 1 and Figure 2 As shown, the adjacently disposed first transverse electrode 122 and the second transverse electrode 132 are electrically connected to the conductive film layer 140 therebetween to form a heating segment.

[0071] In the embodiment of the present application, the heating rate of the first section 112 is greater than the heating rate of the second section 113. As a result, in the early stage of the heating stage, the temperature of the upper section of the heating tube 100 is greater than that of the middle and lower sections. After the cigarette is inserted, the tobacco near the upper section of the heating tube 100 can quickly reach the atomization temperature, ensuring the amount of smoke in the first few puffs. The tobacco near the middle and lower sections heats up more slowly, which can effectively slow down the formation of water vapor in the middle and lower sections of the tobacco and its upward diffusion, and reduce the temperature of the smoke in the first few puffs. In the middle and late stages of the heating stage, due to the heat conduction of the heating tube 100 itself, the temperatures of the various sections of the entire heating tube 100 gradually tend to be consistent, which can provide users with continuous smoke and aroma.

[0072] Meanwhile, the heating tube 100 sets the first electrode 120 and the second electrode 130 as a cross electrode structure including longitudinal electrodes and transverse electrodes, and realizes different control of the heating speed of each section through the cross electrode structure, so that the structure is simple and the cost is low.

[0073] Specifically, there are many methods to achieve that the heating speed of the first section 112 is greater than that of the second section 113, such as controlling the heating speed by changing the axial length of the conductive film layer 140 in each section, or not providing the conductive film layer 140 in the section where the heating speed is required to be slow so that the section does not generate heat, or by changing the width of the electrode in each section. Each method is described in detail below.

[0074] It is understandable that the conductive film layer 140 can be an infrared electric heating film layer, such as an infrared electric heating coating; the infrared electric heating coating can generate heat energy when powered on, and then generate infrared rays of a certain wavelength. When the wavelength of the infrared ray matches the absorption wavelength of the aerosol-forming matrix, the energy of the infrared ray is easily absorbed by the aerosol-forming matrix. In the embodiment of the present application, the wavelength of the infrared ray is not limited, and it can be an infrared ray of 0.75μm to 1000μm, and optionally a far infrared ray of 1.5μm to 400μm. The infrared electric heating coating can be optionally prepared by fully mixing far-infrared electric heating ink, ceramic powder and inorganic adhesive, and then printing it on the outer surface of the substrate, and then drying and curing it for a certain period of time. The thickness of the infrared electric heating coating is 30μm-50μm; of course, the infrared electric heating coating can also be prepared by mixing tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate in a certain proportion and then coating it on the outer surface of the substrate; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer. One of the following: a ceramic layer, a zirconium-titanium nitride ceramic layer, a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron-based oxide ceramic layer, an iron-based nitride ceramic layer, an iron-based boride ceramic layer, an iron-based carbide ceramic layer, a rare earth-based oxide ceramic layer, a rare earth-based nitride ceramic layer, a rare earth-based boride ceramic layer, a rare earth-based carbide ceramic layer, a nickel-cobalt-based oxide ceramic layer, a nickel-cobalt-based nitride ceramic layer, a nickel-cobalt-based boride ceramic layer, a nickel-cobalt-based carbide ceramic layer or a high silicon molecular sieve ceramic layer.

[0075] In some embodiments, the conductive film layer 140 may be a resistive film layer, such as a film layer / coating containing a resistive material; the resistive material here includes, but is not limited to: semiconductors such as doped ceramics, "conductive" ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic materials and metal materials. The composite material may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, alloys containing nickel, cobalt, chromium, aluminum, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese, and iron, and super heat-resistant alloys based on nickel, iron, cobalt, stainless steel, and iron-manganese-aluminum-based alloys. The resistive material preferably includes one or more of a semiconductor doped with ceramics, a conductive ceramic, carbon, graphite, graphene, a metal, a metal alloy, a composite material of doped ceramics and a metal. The resistive material more preferably includes one or more of silver, platinum, copper, nickel, and palladium.

[0076] In one embodiment, if Figure 1As shown, the first section 112 and the second section 113 are both provided with a conductive film layer 140, and the first section 112 and the second section 113 are both heating sections. It can also be said that the first section 112 includes a first heating section, and the second section 113 includes a second heating section. The currents of the first heating section and the second heating section both flow through the conductive film layer between the first transverse electrode 122 and the second transverse electrode 132, thereby causing the first heating section and the second heating section to heat up. That is, the current flows in the axial direction, from the first transverse electrode 122 corresponding to the section to the second transverse electrode 132 corresponding to the section, or from the second transverse electrode 132 corresponding to the section to the first transverse electrode 122 corresponding to the section.

[0077] Specifically, the first longitudinal electrode 121 and the second longitudinal electrode 131 are connected to an external power supply. The first longitudinal electrode 121 and the second longitudinal electrode 131 are connected to the positive and negative electrodes of the power supply, respectively. The first longitudinal electrode 121 can be connected to the positive electrode and the second longitudinal electrode 131 can be connected to the negative electrode, or the first longitudinal electrode 121 can be connected to the negative electrode and the second longitudinal electrode 131 can be connected to the positive electrode. Taking the first longitudinal electrode 121 connected to the positive electrode and the second longitudinal electrode 131 connected to the negative electrode as an example, the current flows from the first longitudinal electrode 121 to the first transverse electrode 122, and from the first transverse electrode 122 to the conductive film layer 140, and the current moves axially in the conductive film layer 140 and flows to the second transverse electrode 132. In other words, the current moves axially in each heating section.

[0078] For further reference, Figure 1 As shown, the length L1 of the first heating section along the axial direction is less than the length L2 of the second heating section along the axial direction. In the above embodiment, by setting the length L2 of the second heating section to be longer, that is, setting the conductive film layer 140 of the second heating section to be longer, the heating speed of the second heating section is reduced. The specific principle is described as follows:

[0079] Taking the conductive film layer 140 as an infrared electric heating film layer as an example, the resistance of the infrared heating tube 100 can be calculated according to the resistance formula of the wire: To estimate, where ρ is the resistivity, and ρ remains basically unchanged after the infrared film coating process is stable; L is the length of the infrared heating film along the direction of the current, and S is the area of ​​the cross section of the infrared heating film perpendicular to the current direction (S = a*b, where a is the length of the cross section of the infrared heating film perpendicular to the current direction, and b is the thickness of the infrared heating film. The value S remains basically unchanged after the outer diameter of the infrared tube is determined and the coating process is stable); therefore, the resistance R of each infrared film layer of the infrared heating tube 100 is only related to the length L. The larger L is, the larger the resistance value R is. Because the voltage of each infrared film layer in the embodiment of the present application is input by the first lateral electrode 122 and the second lateral electrode 132 corresponding to each infrared film layer, and is equal to the input voltage U, according to the formula power Therefore, the heating power P of each film layer is inversely proportional to the film length L, that is, the power ratio of each film layer is According to the power density per unit area formula: Since the arc lengths of the horizontal cross sections of the infrared film are equal, S1 / S2 = L1 / L2, that is, The ratio of the power density E per unit area of ​​each film layer is inversely proportional to the square of its infrared film length. Therefore, the longer the infrared film length L, the smaller the power density E per unit area and the slower the heating.

[0080] It can be seen from the above that in the embodiment of the present application, the power density E per unit area of ​​different heating sections is as follows: E1 and E2 are the power density per unit area of ​​different heating sections; L1 and L2 are the lengths of different heating sections along the axial direction.

[0081] refer to Figure 1 As shown, in some embodiments, the length L2 of the second heating section along the axial direction is 1.5 to 2 times the length L1 of the first heating section along the axial direction. In some embodiments, the length L1 of the first heating section along the axial direction is 5 to 15 mm.

[0082] refer to Figure 1 and Figure 2 , the first longitudinal electrode 121 and the second longitudinal electrode 131 are spaced apart from the conductive film layer 140, so that the longitudinal electrodes (the first longitudinal electrode 121 and the second longitudinal electrode 131) are insulated from the conductive film layer 140, and the current on the longitudinal electrodes cannot flow to the conductive film layer 140. Figure 1 As shown, the interval between the first longitudinal electrode 121 and the conductive film layer 140 is d1. Figure 2 As shown, the interval between the second longitudinal electrode 131 and the conductive film layer 140 is d2. In some embodiments, the width of d1 and d2 is 0.2-2 mm.

[0083] refer to Figure 1 The substrate 110 is made of insulating materials such as ceramic, glass or quartz, or a metal material that has been treated with insulation. In this way, after the first longitudinal electrode 121 and the second longitudinal electrode 131 are spaced apart from the conductive film layer 140, a section of the substrate 110 can be spaced apart from the first longitudinal electrode 121 and the second longitudinal electrode 131 and the infrared coating layer 140, so that the longitudinal electrodes and the conductive film layer 140 are insulated.

[0084] Figure 1 In the embodiment shown, the heating speed is controlled by changing the length of the conductive film layer 140. In this embodiment, the width of the first longitudinal electrode 121 and the second longitudinal electrode 131 is 1-5 mm, and the width of the first transverse electrode 122 and the second transverse electrode 132 is 0.5-2 mm.

[0085] Figure 1 In the illustrated embodiment, the first heating section and the second heating section share the first transverse electrode 122 . In other embodiments, the second transverse electrode 132 may be shared, depending on the arrangement of the transverse electrodes on the substrate 110 . Figure 1 In the embodiment shown in , the first heating segment and the second heating segment share the first lateral electrode 122, and the shared first lateral electrode 122 is respectively connected to the conductive film layer 140 of the first heating segment and the conductive film layer 140 of the second heating segment. In other embodiments, the first heating segment and the second heating segment may not share the same electrode. In the case of not sharing the same electrode, it is only necessary to space the two lateral electrodes (the first lateral electrode 122 and / or the second lateral electrode 132) disposed between the first heating segment and the second heating segment so that the two lateral electrodes between the first heating segment and the second heating segment are insulated.

[0086] refer to Figure 1 As shown, the substrate 110 further includes a third section 114. The third section 114 is disposed adjacent to the second section 113. The third section 114 is also configured as a heating section, that is, the third section 114 includes a third heating section. The current of the third heating section flows in the conductive film layer between the first lateral electrode 122 and the second lateral electrode 132 corresponding to the third heating section, so that the third heating section generates heat.

[0087] like Figure 1 As shown, the axial lengths of the first heating section, the second heating section and the third heating section are L1, L2 and L3 respectively, and preferably, L1<L3<L2. Thus, in the early stage of the heating stage, the heating speed of the first heating section is the fastest, the heating speed of the third heating section is the second fastest, and the heating speed of the second heating section is the slowest.

[0088] The method of controlling the heating speed of the heating section described above is to change the length of the heating section. In other embodiments, the heating speed can be controlled by the width of the lateral electrode. Figure 3As shown, one of the first transverse electrode 122 and the second transverse electrode 132 of the first heating section is a wide electrode, and the other is a narrow electrode, and the wide electrode is arranged in the second section 113. Specifically, since the first transverse electrode 122 and the second transverse electrode 132 of the first heating section, it is possible that the first transverse electrode 122 is located in the second section 113 close to the second section 113, or it is possible that the second transverse electrode 132 is located in the second section 113 close to the second section 113. However, no matter which transverse electrode is located in the second section 113, the electrode is arranged to be wider, so that the second section 113 can be heated up more slowly, because the resistance of the electrode coating is close to zero, and the electrode area hardly generates heat, so the second section can be heated up more slowly. The wide electrode and the narrow electrode mentioned here, wide and narrow refer to the size of the electrode along the axial direction of the substrate 110.

[0089] like Figure 3 In the embodiment shown, the first lateral electrode 122 of the first heating section is set wider to cover the second section 113. The substrate 110 also includes a third section 114 arranged adjacent to the second section 113. The third section 114 includes a third heating section, that is, the third section 114 is a heating section. Figure 3 The first transverse electrode 122 of the first heating section is a common electrode between the first heating section and the third heating section, while the second section 113 is covered by the wider first transverse electrode 122 and hardly generates heat.

[0090] Furthermore, the length of the wide electrode along the axial direction is 2 to 10 mm. Figure 3 The first transverse electrode 122 of the first heating section is a wide electrode, and the width H1 of the wide electrode (ie, the length along the axial direction) is 2 to 10 mm.

[0091] In one embodiment, if Figure 3 As shown, the substrate 110 further includes a fourth section 115 and a fifth section 116. The fourth section 115 is covered by the wide electrode second transverse electrode 132, the fifth section 116 is a heating section, and the third heating section and the heating section on the fifth section 116 share the second transverse electrode 132 on the fourth section 115. The width H2 of the wide electrode on the fourth section 115 is 2 to 10 mm.

[0092] Figures 1 to 4 In the embodiment shown, the conductive film layer 140 can be continuously arranged in the axial direction. The conductive film layer extends from one end of the substrate 110 to the other end. It is only necessary to arrange the required electrodes on the conductive film layer 140 and control the width of the electrodes. Figure 5 and Figure 6 In the embodiment shown, the second section 113 of the substrate 110 is not provided with the conductive film layer 140. Figure 5As shown, the first section 112 is a heating section, that is, the first section 112 includes a first heating section, and the current of the first heating section flows through the conductive film layer 140 between the first lateral electrode 122 and the second lateral electrode 132, so that the first heating section generates heat. The second section 113 is not provided with the conductive film layer 140, so the second section 113 will not generate heat, so that the temperature rise rate of the first section 112 is set to be greater than the temperature rise rate of the second section 113 in the present application. Figure 5 As shown, the length of the second section 113 is K1, and the conductive film layer 140 is not disposed in the section with the length K1.

[0093] like Figure 5 In the illustrated embodiment, the substrate 110 further includes a third section 114 , which is a heating section. In one embodiment, the heating speed of the third section 114 can be set to be slower than that of the first section 112 .

[0094] Specifically, refer to Figure 5 There are three methods for not setting the conductive film layer 140 in the second section 113. The first method is to directly not coat the conductive film layer 140 in the second section 113. The second method is to first coat the entire substrate 110 with the conductive film layer 140 and then remove the conductive film layer 140 in the second section 113. The third method is to partially remove the conductive film layer 140 coated in the second section 113 so that the conductive film layer 140 in the second section 113 is separated by the substrate 110 to form at least two independent conductive film layers 140.

[0095] You can also say, Figure 5 In the embodiment shown, the conductive film layer is non-continuously arranged in the axial direction, and the second section 113 is a discontinuous area of ​​the conductive film layer. Specifically, the conductive film layer only needs to be arranged as a non-continuous conductive film layer, and there is a spacing area in the middle section of the conductive film layer, and the spacing area is the second section 113, so that the second section 113 can be heated slowly.

[0096] In the present application embodiment, Figure 1 , Figure 3 and Figure 5 As shown, the first transverse electrodes 122 and the second transverse electrodes 132 are alternately arranged in the axial direction.

[0097] Of course, in other embodiments, such as Figure 7 As shown, the first transverse electrodes 122 and the second transverse electrodes 132 may not be arranged alternately in the axial direction. Figure 7 As shown, two second transverse electrodes 132 are disposed adjacent to each other. Of course, in other embodiments, two first transverse electrodes 122 may also be disposed adjacent to each other.

[0098] Specifically, Figure 7As shown, the first section 112 includes a first heating section, and the current of the first heating section flows through the conductive film layer 140 between the first lateral electrode 122 and the second lateral electrode 132, so that the first heating section generates heat. The second section 113 is provided with a conductive film layer 140, and two first lateral electrodes 122 or two second lateral electrodes 132 are also provided, and the conductive film layer 140 is respectively connected to the two first lateral electrodes 122 or the two second lateral electrodes 132. The conductive film layer 140 of the second section 113 is connected to two electrodes of the same type, so no current flows through, and the second section 113 does not generate heat.

[0099] Further, such as Figure 7 As shown, the substrate 110 also includes a third section 114 disposed adjacent to the second section 113. The third section 114 includes a third heating section. The current of the third heating section flows in the conductive film layer 140 between the first lateral electrode 122 and the second lateral electrode 132 to generate heat in the third heating section.

[0100] like Figure 7 As shown, starting from the top of the substrate, the first transverse electrode and the second transverse electrode are sequentially arranged in the axial direction as follows: the first transverse electrode 122, the second transverse electrode 132, the second transverse electrode 132 and the first transverse electrode 122. In other embodiments, it can also be: the second transverse electrode 132, the first transverse electrode 122, the first transverse electrode 122 and the second transverse electrode 132.

[0101] Continue to refer Figure 1 , Figure 3 and Figure 5 The first longitudinal electrode 121 and the second longitudinal electrode 131 are respectively arranged at two bisecting points of the substrate 110 along the circumferential direction.

[0102] At each position where the longitudinal electrode extends from the transverse electrode, two symmetrically arranged transverse electrodes extend in different directions, and the two transverse electrodes extend toward another longitudinal electrode in an embracing manner. The end of the transverse electrode is spaced from the other longitudinal electrode to insulate the end of the transverse electrode from the other longitudinal electrode.

[0103] The present application also provides a heating tube 100. Figure 1The heating tube 100 includes a substrate 110 and a conductive film layer 140. A housing cavity 111 is defined in the substrate 110, and the housing cavity 111 is used to accommodate at least part of the aerosol generating product. After the aerosol generating product 101 is heated, the aerosol generated flows out from the top of the substrate 110. The substrate 110 includes at least a first section 1123 and a second section 113 adjacently arranged in the axial direction. The first section 112 is arranged near the top of the substrate 110, and the second section 113 is located below the first section 112 in the axial direction and is arranged adjacent to the first section 112. A plurality of heating sections 112 are arranged in the axial direction on the substrate 110. The conductive film layer 140 is arranged on each heating section 112. The current in the conductive film layer 140 of each heating section 112 flows in the axial direction of the substrate 110, so that each heating section 112 generates heat. The temperature of the first section 112 is higher than that of the second section 113, so that the tobacco near the upper section of the heating tube 100 can quickly reach the atomization temperature, ensuring the amount of smoke in the first few puffs. The tobacco near the middle and lower sections heats up more slowly, which can effectively slow down the formation and upward diffusion of water vapor in the middle and lower sections of the tobacco, and reduce the temperature of the smoke in the first few puffs.

[0104] In addition, the arrangement of the first electrode and the second electrode in the embodiment of the present application enables the current of the heating section on the heating tube 100 to flow in the axial direction. This arrangement is suitable for the case of a thick and short substrate, which is conducive to reducing the resistance of the conductive film layer of the heating section and improving the heating rate of the heating section. The thick and short substrate in this article can be understood as: the inner diameter of the substrate 110 is between 6mm and 15mm, or between 7mm and 15mm, or between 7mm and 14mm, or between 7mm and 12mm, or between 7mm and 10mm; the axial extension length of the substrate 110 is between 15mm and 30mm, or between 15mm and 28mm, or between 15mm and 25mm, or between 16mm and 25mm, or between 18mm and 25mm, or between 18mm and 24mm, or between 18mm and 22mm. The substrate 110 of the above size is suitable for a thick and short aerosol generating product 101.

[0105] The present application also provides an aerosol generating device. Figure 6 As shown, the aerosol generating device 10 includes the above-mentioned heating tube 100 and also includes a power supply 200. The power supply 200 is used to supply power to the heating tube 100. The first electrode 120 and the second electrode 130 of the heating tube 100 are connected to the power supply 200.

[0106] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present application. It is not necessary and impossible to list all implementation methods exhaustively here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A heating tube, characterized in that: include: A substrate, wherein a receiving cavity is defined in the substrate, the receiving cavity is used to receive at least part of the aerosol generating product, and the aerosol generated by the aerosol generating product after being heated flows out from the top of the substrate, the substrate at least comprising a first section and a second section adjacently arranged in the axial direction, the first section being arranged close to the top of the substrate; A conductive film layer is disposed on at least a partial surface of the substrate; A first electrode, comprising a first longitudinal electrode arranged along the axial direction of the substrate, and at least one first transverse electrode, wherein the first transverse electrode extends from the first longitudinal electrode along the circumferential direction of the substrate; A second electrode, comprising a second longitudinal electrode arranged along the axial direction of the substrate, and at least one second transverse electrode, wherein the second transverse electrode extends from the second longitudinal electrode along the circumferential direction of the substrate; The first lateral electrode and the second lateral electrode disposed adjacent to each other are electrically connected to the conductive film layer therebetween to form a heating section; Wherein, the heating rate of the first section is greater than the heating rate of the second section.

2. The heating tube according to claim 1, characterized in that: The first section includes a first heating section, and the second section includes a second heating section. Currents of the first heating section and the second heating section flow in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section and the second heating section generate heat.

3. The heating tube according to claim 2, characterized in that: The length L1 of the first heating section along the axial direction is smaller than the length L2 of the second heating section along the axial direction.

4. The heating tube according to claim 3, characterized in that: L2 is 1.5 to 2 times of L1.

5. The heating tube according to claim 3, characterized in that: The length of the first heating section along the axial direction is 5 to 15 mm.

6. The heating tube according to claim 2, characterized in that: The first lateral electrode or the second lateral electrode disposed between the first heating segment and the second heating segment is a common electrode, and the common electrode is connected to the conductive film layer of the first heating segment and the conductive film layer of the second heating segment respectively; or The first transverse electrode and the second transverse electrode disposed between the first heating segment and the second heating segment are spaced apart from each other so as to insulate the first transverse electrode from the second transverse electrode.

7. The heating tube according to claim 2, characterized in that: The substrate also includes a third section arranged adjacent to the second section, and the third section includes a third heating section. The current of the third heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the third heating section generates heat.

8. The heating tube according to claim 7, characterized in that: The relationship among the axial length L1 of the first heating section, the axial length L2 of the second heating section and the axial length L3 of the third heating section is as follows: L1<L3<L2.

9. The heating tube according to claim 1, characterized in that: The first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat; Wherein, one of the first transverse electrode and the second transverse electrode of the first heating section is a wide electrode, and the other is a narrow electrode, and the wide electrode is arranged in the second section.

10. The heating tube according to claim 9, characterized in that: The substrate further includes a third section disposed adjacent to the second section, the third section includes a third heating section, and the wide electrode is a common electrode between the first heating section and the third heating section.

11. The heating tube according to claim 9, characterized in that: The axial length of the wide electrode is 2 to 10 mm.

12. The heating tube according to any one of claims 1 to 11, characterized in that: The conductive film layers are continuously arranged in the axial direction.

13. The heating tube according to claim 1, characterized in that: The first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat; Wherein, the second section is not provided with the conductive film layer.

14. The heating tube according to claim 1, characterized in that: The first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat; The conductive film layer is disposed discontinuously in the axial direction, and the second section is a discontinuous area of ​​the conductive film layer.

15. The heating tube according to any one of claims 1 to 14, characterized in that: The first transverse electrodes and the second transverse electrodes are alternately arranged in the axial direction.

16. The heating tube according to claim 1, characterized in that: The first section includes a first heating section, and a current of the first heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, so that the first heating section generates heat; A conductive film layer is disposed on the second section, and two of the first transverse electrodes or two of the second transverse electrodes are also disposed thereon, and the conductive film layer is respectively connected to the two of the first transverse electrodes or the two of the second transverse electrodes.

17. The heating tube according to claim 16, characterized in that: The substrate further includes a third section disposed adjacent to the second section, the third section including a third heating section, and current of the third heating section flows in the conductive film layer between the first lateral electrode and the second lateral electrode, causing the third heating section to generate heat.

18. The heating tube according to claim 17, characterized in that: Starting from the top of the substrate, the first transverse electrode and the second transverse electrode are arranged in sequence in the axial direction as follows: a first horizontal electrode, a second horizontal electrode, a second horizontal electrode and a first horizontal electrode; or The second horizontal electrode, the first horizontal electrode, the first horizontal electrode, and the second horizontal electrode.

19. The heating tube according to claim 16, characterized in that: The conductive film layers are continuously arranged in the axial direction.

20. The heating tube according to any one of claims 1 to 19, characterized in that: The first longitudinal electrode and the second longitudinal electrode are spaced apart from the conductive film layer, so that the first longitudinal electrode, the second longitudinal electrode and the conductive film layer are insulated from each other.

21. The heating tube according to any one of claims 1 to 20, characterized in that: The first longitudinal electrode and the second longitudinal electrode are respectively arranged at two bisecting points of the substrate along the circumferential direction.

22. The heating tube according to any one of claims 1 to 21, characterized in that: The circumferential length of the first longitudinal electrode and the second longitudinal electrode is 1 to 5 mm; or, the axial length of the first transverse electrode and the second transverse electrode is 0.5 to 2 mm; or, the circumferential length of the interval between the longitudinal electrode and the infrared coating is 0.2 to 2 mm.

23. A heating tube, characterized in that: include: A substrate, wherein a receiving cavity is defined in the substrate, the receiving cavity is used to receive at least part of the aerosol generating product, and the aerosol generated by the aerosol generating product after being heated flows out from the top of the substrate, the substrate at least comprising a first section and a second section adjacently arranged in the axial direction, the first section being arranged close to the top of the substrate; The base body is provided with a plurality of heating sections along the axial direction; A conductive film layer is provided at each of the heating segments, and the current of the conductive film layer flows along the axial direction to make the heating segment generate heat; Wherein, the temperature of the thermal field of the first section is higher than the temperature of the thermal field of the second section.

24. An aerosol generating device, characterized in that: The heating tube comprises a heating tube as claimed in any one of claims 1 to 23, and further comprises a power supply, wherein the power supply is used to supply power to the heating tube.

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