Infrared heating tube and aerosol generating device

Abstract

The invention discloses an infrared heating tube and an aerosol generating device. The infrared heating tube comprises a base body, and a containing cavity is defined in the base body and used for containing at least part of the aerosol generating product; the infrared film layer is arranged on at least part of the surface of the base body, and the infrared film layer can emit infrared radiation after being electrified, so that the aerosol generating product is heated to generate aerosol; the infrared shielding layer is arranged on the base body or at least part of the surface of the infrared film layer, and the infrared shielding layer can block at least part of infrared radiation of the infrared film layer to the aerosol generating product. The infrared heating tube can reduce the suction temperature of the aerosol of the first several mouths.

Description

Technical Field

[0001] The present application relates to the technical field of heating without burning aerosol generation, and in particular to an infrared 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 infrared heating tubes of existing heat-not-burn products generally have the problem of burning the mouth in the first few puffs of smoke. Although some structures designed in the prior art reduce the temperature of the first few puffs by segmented heating, such structures are complex, costly, and difficult to assemble due to the large number of parts. Summary of the invention

[0004] In order to solve the problem in the prior art that the temperature of the first few puffs of smoke from an aerosol generating device is too high, causing the first few puffs of smoke to burn the mouth, an embodiment of the present application provides an infrared heating tube and an aerosol generating device.

[0005] On the one hand, an embodiment of the present application provides an infrared heating tube, the infrared heating tube comprising:

[0006] A substrate, wherein a receiving cavity is defined in the substrate, and the receiving cavity is used to receive at least a portion of the aerosol generating article;

[0007] an infrared film layer disposed on at least a portion of the surface of the substrate, the infrared film layer being capable of emitting infrared radiation when energized, thereby heating the aerosol generating article to generate an aerosol;

[0008] The infrared shielding layer is arranged on at least a portion of the surface of the substrate or the infrared film layer, and the infrared shielding layer can block at least a portion of the infrared radiation of the infrared film layer to the aerosol generating product.

[0009] In some embodiments, the infrared film layer is disposed on the outer surface of the substrate, and the infrared shielding layer is disposed on the inner surface of the substrate, or

[0010] The infrared film layer and the infrared shielding layer are both arranged on the inner surface of the substrate, and the infrared shielding layer is closer to the aerosol generating product than the infrared film layer.

[0011] In some embodiments, the inner wall of the substrate includes at least two sections arranged sequentially along the axial direction, and the infrared shielding layer is arranged in one or more sections of the at least two sections.

[0012] In some embodiments, the aerosol generated by the aerosol generating article flows out from the top of the substrate; the inner wall of the substrate includes a first section and a second section adjacent to each other in the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the first section.

[0013] In some embodiments, the length of the first section is 10-20 mm, and the length of the second section is 16-26 mm.

[0014] In some embodiments, the aerosol generated by the aerosol generating product flows out from the top of the substrate; the inner wall of the substrate includes a first section, a second section and a third section arranged in sequence along the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the second section.

[0015] In some embodiments, the length of the first section is 6-12 mm, the length of the second section is 13-19 mm, and the length of the third section is 8-14 mm.

[0016] In some embodiments, the aerosol generated by the aerosol generating product flows out from the top of the substrate; the inner wall of the substrate includes a first section, a second section, a third section and a fourth section arranged in sequence along the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the first section and the third section.

[0017] In some embodiments, the length of the first section is 6-10 mm, the length of the second section is 3-7 mm, the length of the third section is 4-8 mm, and the length of the fourth section is 15-19 mm.

[0018] In some embodiments, the infrared film layer covers all sections of the substrate.

[0019] In some embodiments, the infrared emissivity of the infrared shielding layer is lower than the infrared emissivity of the substrate.

[0020] In some embodiments, the infrared shielding layer is a metal material.

[0021] In some embodiments, the infrared shielding layer is made of aluminum, copper, silver, antimony tin oxide, cesium tungsten bronze, or tungsten oxide.

[0022] In some embodiments, the infrared shielding layer is a film layer.

[0023] In some embodiments, the infrared shielding layer is disposed on the inner wall of the substrate by magnetron sputtering coating, chemical solution coating, spraying or high temperature resistant adhesive bonding.

[0024] In some embodiments, the invention further comprises:

[0025] A first electrode, comprising a first transverse electrode disposed along the circumference of the substrate, and a first longitudinal electrode extending from the first transverse electrode along the circumference of the substrate;

[0026] The second electrode includes a second transverse electrode arranged along the circumference of the substrate, and a second longitudinal electrode extending from the second transverse electrode along the circumference of the substrate.

[0027] 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.

[0028] In some embodiments, the first transverse electrode and the second transverse electrode are disposed at the same end of the substrate along the longitudinal direction, and the first transverse electrode and the second transverse electrode are spaced apart around the circumference of the substrate.

[0029] In some embodiments, the first lateral electrode and the second lateral electrode are spaced apart from the infrared film layer, so that the first lateral electrode, the second lateral electrode and the infrared film layer are insulated from each other.

[0030] In some embodiments, the infrared film layer is continuously disposed on the substrate.

[0031] In one aspect, an embodiment of the present application provides an aerosol generating device, which includes the infrared heating tube as described above, and also includes a power source, wherein the power source is used to supply power to the infrared heating tube.

[0032] The infrared heating tube is provided with an infrared shielding layer on at least part of the surface of the substrate or the infrared film layer, and the infrared shielding layer blocks the infrared radiation of at least part of the infrared film layer to the aerosol generating product, so as to reduce the formation rate of high-temperature water vapor of at least part of the aerosol generating product during the heating stage. In some embodiments, the content of high-temperature water vapor in the aerosol of the first few puffs can be reduced, thereby reducing the smoke temperature of the first few puffs, and will not affect the infrared film layer itself to transfer heat to the aerosol generating product by heat conduction after heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the structure of an infrared heating tube in one embodiment of the present application;

[0035] Figure 2 yes Figure 1 A structural schematic diagram of another perspective of the structure shown;

[0036] Figure 3 is a schematic diagram of the cross-sectional structure of an infrared heating tube in one embodiment of the present application;

[0037] Figure 4 is a schematic diagram of the cross-sectional structure of an infrared heating tube in one embodiment of the present application;

[0038] Figure 5 is a schematic diagram of the cross-sectional structure of an infrared heating tube in one embodiment of the present application;

[0039] Figure 6 It is a schematic diagram of the exploded structure of an infrared heating module in one embodiment of the present application;

[0040] Figure 7 It is a schematic diagram of the cross-sectional structure of an aerosol generating device in one embodiment of the present application.

[0041] In the figure:

[0042] 100. Infrared heating tube; 101. Aerosol generating products;

[0043] 110. base body; 111. receiving cavity; 112. notch;

[0044] 120. Infrared film layer;

[0045] 130. Infrared shielding layer;

[0046] 140, first electrode; 141, first transverse electrode; 142, first longitudinal electrode; 143, first electrode connector;

[0047] 150, second electrode; 151, second transverse electrode; 152, second longitudinal electrode; 153, second electrode connector;

[0048] 10. Aerosol generating device;

[0049] 200, upper fixed seat;

[0050] 300, lower fixing seat;

[0051] 400. Power supply. DETAILED DESCRIPTION

[0052] 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.

[0053] The present application embodiment provides an infrared heating tube. Figure 1 , Figure 2 and Figure 3 As shown, the infrared heating tube 100 includes a substrate 110 , an infrared film layer 120 and an infrared shielding layer 130 .

[0054] The substrate 110 is substantially cylindrical and defines a receiving cavity 111 therein, and 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.

[0055] The infrared film layer 120 is disposed on at least a portion of the surface of the substrate 110. Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the infrared film layer can be disposed on the outer surface of the substrate, and in other optional embodiments, the infrared film layer can also be disposed on the inner surface of the substrate. The outer surface of the substrate 110 is the outer side wall of the substrate 110, and the inner surface of the substrate 110 is the inner side wall of the substrate 110. The infrared film layer 120 can emit infrared radiation after being energized, thereby heating the aerosol generating article 101 to generate aerosol for the user to inhale.

[0056] The infrared shielding layer 130 is disposed on at least part of the surface of the substrate 110 or the infrared film layer 120. Specifically, if the infrared film layer 120 is disposed on the outer surface of the substrate, the infrared shielding layer 130 is disposed on the inner surface of the substrate 110. If the infrared film layer 120 is disposed on the inner surface of the substrate, the infrared shielding layer 130 is disposed on the infrared film layer 120, and the infrared shielding layer 130 is closer to the aerosol generating article 101 than the infrared film layer 120, that is, the infrared shielding layer 130 is disposed on the side of the infrared film layer 120 away from the inner surface of the substrate 110.

[0057] The infrared shielding layer 130 can block the infrared radiation of the infrared film layer 120 to at least part of the aerosol generating product 101, and form a barrier between the infrared film layer 120 and part of the aerosol generating product 101, thereby reducing the speed of high-temperature water vapor formation in this part of the aerosol generating product 101, and achieving the purpose of reducing the smoke temperature. Infrared radiation will cause high-temperature water vapor to form in the aerosol generating product 101. In the embodiment of the present application, the infrared shielding layer 130 is used to block the infrared radiation of the infrared film layer 120 to at least part of the aerosol generating product 101, so that the aerosol temperature can be reduced. The infrared shielding layer 130 can only block the infrared radiation received by part of the aerosol generating product 101, and the other parts of the aerosol generating product 101 can normally receive the infrared radiation, instead of covering all the aerosol generating products 101, so that the normal aerosol temperature can be ensured. In some embodiments, the infrared shielding layer 130 is disposed relatively high, thereby reducing the aerosol temperature of the first few puffs, solving the problem of the first few puffs of smoke burning the mouth that is common in infrared circumferentially heated aerosol generating devices. It also has a simple structure, low cost, and easy assembly. In the middle and late stages of the heating stage, due to the heat conduction effect of the infrared heating tube 100 itself, the temperatures of the various sections of the entire infrared heating tube 100 gradually converge, providing the user with continuous smoke and aroma. At the same time, the provision of the infrared shielding layer 130 will not affect the infrared film layer 120 itself from heating up and transferring heat to the aerosol generating product 101 by heat conduction. Figure 7 As shown by the middle arrow, the aerosol generated by the aerosol generating product 101 flows out from the top of the substrate 110, and the top of the substrate 110 is also the upper end. The infrared shielding layer 130 is arranged in the middle and upper section of the substrate 110, thereby reducing the water vapor formation speed in the middle and upper section of the aerosol matrix in the aerosol generating product 101, reducing the content of high-temperature water vapor in the first few puffs of smoke, and solving the problem of burning the mouth in the first few puffs of smoke.

[0058] In some embodiments, reference Figures 3 to 5 , the inner side wall of the substrate 110 includes at least two sections arranged in sequence along the axial direction, and the infrared shielding layer 130 is arranged in one or more sections. When the inner side wall of the substrate 110 includes only two or three sections, the infrared shielding layer 130 is arranged in only one of the sections. When the inner side wall of the substrate 110 includes multiple sections, the infrared shielding layer 130 may be arranged in multiple sections instead of only one of the sections. Figure 5 As shown, the inner wall of the base 110 includes a plurality of sections, the infrared shielding layer 130 is disposed in two of the sections, and the two sections where the infrared shielding layer 130 is disposed are not adjacent.

[0059] In the embodiment of the present application, the position setting of the infrared shielding layer 130 in each section of the substrate 110 is not applicable to the two situations where the infrared film layer is set on the outer surface of the substrate and the infrared film layer is set on the inner surface of the substrate.

[0060] In one embodiment, if Figure 3 As shown, the inner side wall of the substrate 110 includes a first section L1 and a second section L2 adjacent to each other in the axial direction. The first section L1 is close to the top of the substrate 110, and the infrared shielding layer 130 is arranged in the first section L1, that is, arranged in the upper section of the substrate 110. The length of the first section L1 is 10-20 mm, and the length of the second section L2 is 16-26 mm. In this embodiment, the inner side wall of the substrate 110 includes only two sections, upper and lower. If the length of the first section L1 located at the top is shorter, the effect of reducing the temperature of the first few puffs of smoke is not obvious. If the length of the first section L1 located at the top is longer, the second section L2 will be too short, and the ideal effect of generating a sufficient amount of aerosol cannot be achieved. The above selection of the values ​​of the first section L1 and the second section L2 can not only meet the effect of reducing the temperature of the first few puffs of smoke, but also take into account the amount of aerosol generated. In a specific embodiment, the length of the first section is 15 mm, and the length of the second section is 21 mm.

[0061] In one embodiment, if Figure 4 As shown, the inner side wall of the substrate 110 includes a first section H1, a second section H2 and a third section H3 arranged in sequence along the axial direction. The first section H1 is close to the top of the substrate 110, and the infrared shielding layer 130 is arranged in the second section H2, that is, in the middle section of the substrate 110. The length of the first section is 6 to 12 mm, the length of the second section is 13 to 19 mm, and the length of the third section is 8 to 14 mm. After testing, the value range selection of the above sections can not only meet the effect of reducing the temperature of the first few puffs of smoke, but also take into account the amount of aerosol generated. In a specific embodiment, the length of the first section is 9 mm, the length of the second section is 16 mm, and the length of the third section is 11 mm.

[0062] In one embodiment, if Figure 5 As shown, the inner side wall of the substrate 110 includes a first section R1, a second section R2, a third section R3 and a fourth section R4 arranged in sequence along the axial direction. The first section R1 is close to the top of the substrate 110, and the infrared shielding layer 130 is arranged in the first section and the third section, that is, in the upper section and the middle section of the substrate 110. The length of the first section is 6 to 10 mm, the length of the second section is 3 to 7 mm, the length of the third section is 4 to 8 mm, and the length of the fourth section is 15 to 19 mm. After testing, the value range selection of the above sections can not only meet the effect of reducing the temperature of the first few puffs of smoke, but also take into account the amount of aerosol generated. The length of the first section is 8 mm, the length of the second section is 5 mm, the length of the third section is 6 mm, and the length of the fourth section is 17 mm.

[0063] refer to Figure 1 and Figure 2, the infrared film layer 120 covers all sections of the substrate 110. That is, the infrared film layer 120 is disposed on the outer surface of the substrate 110 corresponding to each section of the inner side wall of the substrate 110, and the infrared film layer 120 on the outer surface of the substrate 110 covers all sections of the inner side wall of the substrate 110.

[0064] In the embodiment of the present application, the infrared film layer 120 is an infrared electrothermal film layer, or an infrared electrothermal coating. The infrared electrothermal 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 0.75μm to 1000μm infrared ray, and optionally 1.5μm to 400μm far infrared ray. The infrared electrothermal coating can be optionally prepared by fully mixing far-infrared electrothermal ink, ceramic powder and inorganic adhesive, and then printing them on the outer surface of the substrate 110, and then drying and curing for a certain period of time. The thickness of the infrared electrothermal coating is 30μm-50μm. Of course, the infrared electric heating coating can also be made 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 110; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, a zirconium-titanium nitride ceramic layer, a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt oxide ceramic layer, a nickel-cobalt nitride ceramic layer, a nickel-cobalt boride ceramic layer, a nickel-cobalt carbide ceramic layer or a high silicon molecular sieve ceramic layer.

[0065] In the embodiment of the present application, the infrared shielding layer 130 is made of a material with low infrared emissivity. The infrared emissivity of the infrared shielding layer 130 needs to be lower than the infrared emissivity of the substrate 110, so that the infrared shielding layer 130 can shield a portion of the infrared radiation.

[0066] In some embodiments, the infrared shielding layer 130 is made of a metal material with low infrared emissivity, such as aluminum, copper, silver, antimony tin oxide, cesium tungsten bronze, or tungsten oxide.

[0067] The infrared shielding layer 130 may be a film layer. The process of setting the infrared shielding layer 130 on the substrate 110 may be magnetron sputtering coating, chemical solution coating (such as silver mirror reaction), spraying or high temperature resistant glue (such as silicone) bonding.

[0068] refer to Figure 1 and Figure 2, the infrared heating tube 100 also includes a first electrode 140 and a second electrode 150. The first electrode 140 and the second electrode 150 are arranged on the surface of the substrate 110. Specifically, the first electrode 140 and the second electrode 150 can be arranged on the outer surface of the substrate 110, or on the inner surface of the substrate 110, depending on the setting position of the infrared film layer 120. If the infrared film layer 120 is arranged on the outer surface of the substrate 110, the first electrode 140 and the second electrode 150 are arranged on the outer surface of the substrate 110. If the infrared film layer 120 is arranged on the inner surface of the substrate 110, the first electrode 140 and the second electrode 150 are arranged on the inner surface of the substrate 110. The first electrode 140 and the second electrode 150 are used to connect the infrared film layer 120 to the power supply 400. Figure 1 As shown, the first electrode 140 includes a first transverse electrode 141 and a first longitudinal electrode 142. The first transverse electrode 141 is arranged along the circumference of the substrate 110, and the first longitudinal electrode 142 extends from the first transverse electrode 141 along the circumference of the substrate 110. The second electrode 150 includes a second transverse electrode 151 and a second longitudinal electrode 152. The second transverse electrode 151 is arranged along the circumference of the substrate 110, and the second longitudinal electrode 152 extends from the second transverse electrode 151 along the circumference of the substrate 110.

[0069] During specific assembly, the first transverse electrode 141 and the second transverse electrode 151 are respectively connected to the positive electrode and the negative electrode of the power source 400. The first transverse electrode 141 can be connected to the positive electrode and the second transverse electrode 151 can be connected to the negative electrode, or the first transverse electrode 141 can be connected to the negative electrode and the second transverse electrode 151 can be connected to the positive electrode. Figure 1 and Figure 2 The current flows from the first transverse electrode 141 to the first longitudinal electrode 142 , and from the first longitudinal electrode 142 to the infrared film layer 120 . The current moves circumferentially in the infrared film layer 120 and flows to the second longitudinal electrode 152 .

[0070] The first electrode 140 and the second electrode 150 are silver paste electrodes, which can be coated on the outer surface of the substrate 110 by coating.

[0071] Combination Figure 1 and Figure 2 The first longitudinal electrode 142 and the second longitudinal electrode 152 are respectively arranged at two bisecting points along the circumference of the substrate 110. This makes the first longitudinal electrode 142 and the second longitudinal electrode 152 arranged symmetrically, so that the heating of each part of the infrared film layer 120 is more uniform.

[0072] Continue to refer Figure 1 and Figure 2The first transverse electrode 141 and the second transverse electrode 151 are disposed at the same end of the substrate 110 along the longitudinal direction. Figure 1 and Figure 2 The first transverse electrode 141 and the second transverse electrode 151 are both disposed at the bottom end of the substrate 110, and the first transverse electrode 141 and the second transverse electrode 151 are disposed at intervals around the circumference of the substrate 110. The positional arrangement of the first transverse electrode 141 and the second transverse electrode 151 makes the assembly of the infrared heating tube more convenient. Specifically, as Figure 6 As shown, the first electrode 140 and the second electrode 150 need to be connected to the power supply 400 through the electrode connector. The first electrode 140 is connected to the power supply 400 through the first electrode connector 143, and the second electrode 150 is connected to the power supply 400 through the second electrode connector 153. The first electrode connector 143 and the second electrode connector 153 are metal sheets. When the substrate 110 is installed in the aerosol generating device, it is fixed by the upper fixing seat 200 and the lower fixing seat 300, and the substrate 110 is clamped between the upper fixing seat 200 and the lower fixing seat 300. The position arrangement of the above-mentioned first lateral electrode 141 and the second lateral electrode 151 allows the first electrode connector 143 and the second electrode connector 153 to be directly installed on the same fixing seat, such as the lower fixing seat 300. Reference Figure 6 The first electrode connector 143 and the second electrode connector 153 are fixed on the lower fixing seat 300 opposite to each other, and the substrate 110 is inserted into the lower fixing seat 300, so that the electrodes on the substrate 110 can be connected to the electrode connectors while the substrate 110 is fixed.

[0073] like Figure 1 As shown, a notch 112 may be provided at the bottom of the base 110, and the notch 112 is used to cooperate with the protrusion on the lower fixing seat 300 to achieve positioning between the base 110 and the lower fixing seat 300. It is understandable that a protrusion may also be provided at the bottom of the base 110, and a groove for cooperating with the protrusion may be provided on the lower fixing seat 300 to position the base 110.

[0074] Combination Figure 1 and Figure 2 , the first transverse electrode 141 and the second transverse electrode 151 are spaced apart from the conductive film layer, and the spacings are d1 and d2 respectively. Thus, the first transverse electrode 141, the second transverse electrode 151 and the infrared film layer 120 are insulated, the current in the first transverse electrode 141 cannot flow into the infrared film layer 120, and the current in the infrared film layer 120 cannot flow into the second transverse electrode 151. The current can only follow the path of the first transverse electrode 141-first longitudinal electrode 142-conductive film layer-second longitudinal electrode 152-second transverse electrode 151, or the path of the second transverse electrode 151-second longitudinal electrode 152-conductive film layer-first longitudinal electrode 142-first transverse electrode 141.

[0075] The first lateral electrode 141 and the second lateral electrode 151 are spaced apart from the conductive film layer by a distance of the substrate 110 , and the infrared film layer 120 is not required to be disposed in the area on the surface of the substrate 110 where the lateral electrodes are located.

[0076] 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 lateral electrode 141 and the second lateral electrode 151 are spaced apart from the infrared film layer 120 on the substrate 110, a section of the substrate 110 can be spaced apart from the first lateral electrode 141 and the second lateral electrode 151 and the infrared film layer 120, so that the lateral electrodes are insulated from the conductive film layer.

[0077] like Figure 1 As shown, the infrared film layer 120 is continuously disposed on the substrate 110. Since the electrodes in the embodiment of the present application adopt the design of the horizontal and vertical electrodes, and the current flows along the circumference of the substrate 110, the infrared film layer 120 in the embodiment of the present application can be continuously disposed on the substrate 110, so that the infrared film layer 120 on the substrate 110 can be disposed at one time by coating once, without multiple segmented coatings.

[0078] The present application also provides an aerosol generating device. Figure 7 As shown, the aerosol generating device 10 includes the above-mentioned infrared heating tube 100, and also includes a power supply 400. The power supply 400 is used to supply power to the infrared heating tube 100. The first electrode 140 and the second electrode 150 of the infrared heating tube 100 are electrically connected to the power supply 400 through electrode connectors (first electrode connector 143, second electrode connector 153).

[0079] 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. An infrared heating tube, characterized in that: include: A substrate, wherein a receiving cavity is defined in the substrate, and the receiving cavity is used to receive at least a portion of the aerosol generating article; an infrared film layer disposed on at least a portion of the surface of the substrate, the infrared film layer being capable of emitting infrared radiation when energized, thereby heating the aerosol generating article to generate an aerosol; The infrared shielding layer is arranged on at least a portion of the surface of the substrate or the infrared film layer, and the infrared shielding layer can block at least a portion of the infrared radiation of the infrared film layer to the aerosol generating product.

2. The infrared heating tube according to claim 1, characterized in that: The infrared film layer is arranged on the outer surface of the substrate, and the infrared shielding layer is arranged on the inner surface of the substrate, or The infrared film layer and the infrared shielding layer are both arranged on the inner surface of the substrate, and the infrared shielding layer is closer to the aerosol generating product than the infrared film layer.

3. The infrared heating tube according to claim 1, characterized in that: The inner wall of the substrate includes at least two sections arranged sequentially along the axial direction, and the infrared shielding layer is arranged in one or more sections of the at least two sections.

4. The infrared heating tube according to claim 3, characterized in that: The aerosol generated by the aerosol generating product flows out from the top of the substrate; the inner wall of the substrate comprises a first section and a second section adjacently arranged in the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the first section.

5. The infrared heating tube according to claim 4, characterized in that: The length of the first section is 10-20 mm, and the length of the second section is 16-26 mm.

6. The infrared heating tube according to claim 3, characterized in that: The aerosol generated by the aerosol generating product flows out from the top of the substrate; the inner wall of the substrate comprises a first section, a second section and a third section arranged in sequence along the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the second section.

7. The infrared heating tube according to claim 6, characterized in that: The length of the first section is 6-12 mm, the length of the second section is 13-19 mm, and the length of the third section is 8-14 mm.

8. The infrared heating tube according to claim 1, characterized in that: The aerosol generated by the aerosol generating product flows out from the top of the substrate; the inner wall of the substrate includes a first section, a second section, a third section and a fourth section arranged in sequence along the axial direction, the first section is close to the top of the substrate, and the infrared shielding layer is arranged in the first section and the third section.

9. The infrared heating tube according to claim 8, characterized in that: The length of the first section is 6-10 mm, the length of the second section is 3-7 mm, the length of the third section is 4-8 mm, and the length of the fourth section is 15-19 mm.

10. The infrared heating tube according to any one of claims 3 to 9, characterized in that: The infrared film layer covers all sections of the substrate.

11. The infrared heating tube according to claim 1, characterized in that: The infrared emissivity of the infrared shielding layer is lower than the infrared emissivity of the substrate.

12. The infrared heating tube according to claim 11, characterized in that: The infrared shielding layer is made of metal material.

13. The infrared heating tube according to claim 12, characterized in that: The infrared shielding layer is made of aluminum, copper, silver, antimony tin oxide, cesium tungsten bronze or tungsten oxide.

14. The infrared heating tube according to any one of claims 11 to 13, characterized in that: The infrared shielding layer is a film layer.

15. The infrared heating tube according to claim 14, characterized in that: The infrared shielding layer is arranged on the inner wall of the substrate by magnetron sputtering coating, chemical solution coating, spraying or high temperature resistant adhesive bonding.

16. The infrared heating tube according to claim 1, characterized in that: It also includes: A first electrode, comprising a first transverse electrode disposed along the circumference of the substrate, and a first longitudinal electrode extending from the first transverse electrode along the circumference of the substrate; The second electrode includes a second transverse electrode arranged along the circumference of the substrate, and a second longitudinal electrode extending from the second transverse electrode along the circumference of the substrate.

17. The infrared heating tube according to claim 16, 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.

18. The infrared heating tube according to claim 16, characterized in that: The first transverse electrode and the second transverse electrode are arranged at the same end of the substrate along the longitudinal direction, and the first transverse electrode and the second transverse electrode are arranged at intervals around the circumference of the substrate.

19. The infrared heating tube according to any one of claim 16, characterized in that: The first lateral electrode and the second lateral electrode are both spaced apart from the infrared film layer, so that the first lateral electrode, the second lateral electrode and the infrared film layer are insulated from each other.

20. The infrared heating tube according to any one of claims 16 to 19, characterized in that: The infrared film layer is continuously arranged on the substrate.

21. An aerosol generating device, characterized in that: The infrared heating tube comprises the infrared heating tube as claimed in any one of claims 1 to 20, and further comprises a power supply, wherein the power supply is used to supply power to the infrared heating tube.

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