Heating assembly and aerosol-generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device, the heating assembly comprises a supporting tube, the supporting tube comprises a heat resistance area and a heat conduction area, and the heat resistance area is used for blocking heat conduction of the adjacent heat conduction area; the heating coating is arranged on the outer surface of the supporting pipe and covers the heat resisting area and the at least one heat conduction area. According to the application, the heat resistance area is arranged, so that heat transfer can be slowed down, and heat is concentrated in the preset area; meanwhile, as the heat resistance area is arranged on the supporting pipe, a heat resistance structure does not need to be machined at the heating coating, the heating coating can be of a complete coating structure, and microcracks formed at the heating coating due to machining can be avoided. In addition, the complete coating structure has a complete layered structure, and the compression resistance is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol generation, in particular to a heating assembly of an aerosol generation device. BACKGROUND

[0002] An aerosol generation device is a device for generating aerosol from an aerosol generation article under heating but not combustion. The aerosol generation device comprises a heating assembly for heating the aerosol generation article. In the prior art, the heating assembly comprises a support tube and a heating coating layer arranged on the support tube, the heating layer of the heating coating layer comprises a plurality of sub-heating layers, and different sub-heating layers can be selectively controlled to heat different sections of the aerosol generation article according to control requirements or aerosol generation requirements. For example, in the initial stage of starting the aerosol generation device, in order to shorten the aerosol generation time, the aerosol generation article in a certain section can be heated, and the heating power in this period can be greater than that in other periods.

[0003] In order to improve the concentration of heat in the corresponding section of the aerosol generation article, certain measures need to be taken to limit the heat in the corresponding section.

[0004] In the related art, a heat blocking area is arranged on the outer peripheral wall of the heating assembly, so that heat can be concentrated in the corresponding section to heat the aerosol substrate corresponding to the position. However, in the process of arranging the heat blocking area, micro-cracks may occur in the heating coating layer. Due to the existence of micro-cracks, there is a risk of expansion of the micro-cracks during repeated use and heating of the aerosol generation device, thereby causing the heating assembly to fail, thereby shortening the service life of the heating assembly and affecting the service life of the entire aerosol generation device. CONTENT OF THE UTILITY MODEL

[0005] To solve the problem that the heating coating layer cracks and affects the heating effect of the heating assembly on the aerosol generation article and the user's smoking experience.

[0006] The present application provides a heating assembly, comprising:

[0007] a support tube, the support tube comprising a heat blocking area and a heat conducting area, the heat blocking area being used to block the heat conduction between adjacent heat conducting areas;

[0008] a heating coating layer arranged on the outer surface of the support tube and covering the heat blocking area and at least one heat conducting area.

[0009] The present application provides a heating assembly, the heat conducting area is a plurality of, and at least one heat blocking area is arranged between any two adjacent heat conducting areas.

[0010] The application provides a heating assembly, and the heat resistance zones are multiple, and the multiple heat resistance zones are distributed along the axis of the support tube.

[0011] The application provides a heating assembly, and the heat resistance zone comprises a connecting part and a recess, the recess is a through hole or a groove, and the connecting part and the recess are adjacently arranged.

[0012] The application provides a heating assembly, and the recess extends along an arc or a spiral line in the circumferential direction of the support tube.

[0013] The application provides a heating assembly, and the length of the connecting part in the circumferential direction of the support tube is 0.3mm-2mm; and / or the length of the recess in the circumferential direction of the support tube is 0.05mm-0.5mm.

[0014] The application provides a heating assembly, and the total length of all the connecting parts in the circumferential direction of the support tube accounts for less than or equal to 50% of the circumference of the support tube.

[0015] The application provides a heating assembly, and the number of the connecting parts is greater than or equal to 3.

[0016] The application provides a heating assembly, and the heat resistance zone is provided with a heat insulation material.

[0017] The application provides a heating assembly, and the thermal conductivity of the heat insulation material is 1.4W / (m·K)-4W / (m·K).

[0018] The application provides a heating assembly, and the heat generation coating comprises a first insulating layer, a heat generation layer and a second insulating layer which are sequentially stacked, the first insulating layer is arranged on the outer surface of the support tube, and the heat generation layer is arranged between the first insulating layer and the second insulating layer.

[0019] The application provides a heating assembly, and the heat generation layer comprises multiple sub-heat generation layers, and an interval zone is arranged between two adjacent sub-heat generation layers, the interval zone and the heat resistance zone are oppositely arranged, and the sub-heat generation layer and the heat conduction zone are oppositely arranged.

[0020] The application provides a heating assembly, and the resistance of the sub-heat generation layer is 0.35Ω-1.0Ω; and / or the resistance of the sub-heat generation layer is 0.45Ω-0.8Ω.

[0021] The application provides a heating assembly, and the thickness of the first insulating layer or the second insulating layer is 15μm-30μm.

[0022] The heating assembly provided by the present application has a thermal conductivity of the first insulating layer and the second insulating layer of 1.4 W / (m·K)-4 W / (m·K).

[0023] The heating assembly provided by the present application has a thickness of the support tube of 0.05 mm-0.3 mm; and / or a thickness of the support tube of 0.1 mm-0.2 mm.

[0024] The heating assembly provided by the present application has a thermal conductivity of the support tube of greater than or equal to 15 W / (m·K).

[0025] The heating assembly provided by the present application has a heating coating layer including a first electrode and a second electrode oppositely arranged, and the first electrode and the second electrode are electrically connected with the heating layer.

[0026] The aerosol generating device provided by the present application includes a battery assembly and the heating assembly described above, and the battery assembly provides electric energy for the heating assembly.

[0027] The present application can slow down the heat transfer by setting the heat resistance area, so that the heat is concentrated in the predetermined area; at the same time, since the heat resistance area is arranged on the support tube, it is not necessary to process the heat resistance structure at the heating coating layer, so that the heating coating layer can be a complete coating structure, thereby avoiding the micro-cracks formed by mechanical processing at the heating coating layer. In addition, the complete coating structure has a complete layered structure, and has stronger compression resistance. BRIEF DESCRIPTION OF DRAWINGS

[0028] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these illustrative examples do not limit the embodiments, and elements having the same reference numerals in the figures indicate like elements unless otherwise specifically stated, and the figures in the drawings do not constitute a proportional limitation.

[0029] Figure 1 A schematic diagram of a preparation method of the heating assembly of an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the heating assembly of an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the heating coating layer of an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the heating assembly of an embodiment of the present application;

[0033] Figure 5 A schematic diagram of the heating coating layer of an embodiment of the present application;

[0034] Figure 6A schematic view of an aerosol-generating device according to an embodiment of the present application.

[0035] In the drawings:

[0036] 10, heating assembly;

[0037] 1, support tube; 11, heat blocking region; 111, connecting portion; 112, recessed portion; 12, heat conducting region;

[0038] 2, heating coating; 21, first insulating layer; 22, heating layer; 221, sub-heating layer; 222, spacing region; 23, second insulating layer; 24, first electrode; 25, second electrode;

[0039] 20, battery assembly;

[0040] 100, aerosol-generating device. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0042] The terms "first", "second", "third" in the present application are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship or movement condition between components, etc. in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0043] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0044] It should be understood that when an element as a layer, region or plate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it should be understood that when an element is referred to as being "connected" to or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "about" when used in reference to a particular recited numerical value, means that the value can vary from the recited value by no more than 1%, 2%, 5%, or 10%. The terms "vertical", "horizontal", "left", "right", and similar terms are used herein only to facilitate description of the exemplary embodiments, and do not connote any limitation.

[0045] It should be understood that the embodiments of the present application provide a preparation method of a heating assembly, a heating assembly and an aerosol generating device, and the aerosol generating device can be used in combination with an aerosol generating article, so that the aerosol generating article generates an aerosol.

[0046] The aerosol generating article can include a mouthpiece, a connecting segment, and a tobacco segment capable of generating an aerosol, the connecting segment being located between the mouthpiece and the tobacco segment for guiding the aerosol to the mouthpiece. The mouthpiece can be held by a user's mouth, and the user can inhale the aerosol by sucking the mouthpiece. The tobacco segment in the aerosol generating article can have an aerosol generating substrate therein.

[0047] As used herein, the term "aerosol generating substrate" refers to a substrate capable of releasing volatile substances to form an inhalable aerosol therefrom. The aerosol generating substrate can include a tobacco-containing material containing volatile tobacco flavor compounds released from the substrate upon heating. Specifically, the aerosol generating substrate can be a tobacco-containing aerosol generating substrate or a solid tobacco-containing aerosol generating substrate. Alternatively, the aerosol generating substrate can include a non-tobacco material. The aerosol generating substrate can further include an aerosol former. Examples of suitable aerosol formers are glycerol and propylene glycol.

[0048] As desired, the aerosol generating substrate can contain additional tobacco or non-tobacco volatile flavor compounds released upon heating of the aerosol generating substrate. The aerosol generating substrate can also contain microcapsules, for example, containing additional tobacco or non-tobacco volatile flavor compounds, and such microcapsules can melt during heating of the solid aerosol generating substrate.

[0049] The aerosol generating article can have a substantially rod-like structure extending in a longitudinal direction. The mouthpiece can be disposed adjacent to a proximal end of the aerosol generating article. The tobacco segment can be disposed adjacent to a distal end of the aerosol generating article.

[0050] The heating assembly is used to release heat to the aerosol generating article, so that the aerosol generating substrate generates volatile substances, which combine with air flowing into the aerosol generating substrate to form an aerosol. The air flowing into the aerosol generating substrate and the aerosol generated by the aerosol generating substrate can pass out of the proximal end of the aerosol generating substrate and then be inhaled into the user's mouth cavity.

[0051] The application provides a preparation method of a heating assembly, comprising:

[0052] providing a support tube;

[0053] cutting a heat-insulating region on the support tube, the heat-insulating region separating the support tube into at least one heat-conducting region;

[0054] coating a heat-generating coating on the outer surface of the support tube, and the heat-generating coating covering the heat-insulating region and the at least one heat-conducting region.

[0055] The application first sets the heat-insulating region on the support tube, and then coats the heat-generating coating on the outer surface of the support tube. In this way, the heat-insulating region can slow down the heat transfer, so that the heat is concentrated in the predetermined region. At the same time, since the heat-insulating region is set on the support tube, there is no need to process the heat-insulating structure at the heat-generating coating, so that the heat-generating coating can be a complete coating structure, thereby avoiding the micro-cracks formed by mechanical processing at the heat-generating coating. In addition, the complete coating structure has a complete layered structure, and the compression resistance is stronger.

[0056] In some embodiments, the heat-generating coating also has a sealing effect on the heat-insulating region, so that the support tube has good sealing performance, and the heating assembly has good heating effect on the aerosol generating article, so that the user can obtain good smoking taste.

[0057] In an embodiment of the application, the support tube can include metal or alloy. In an embodiment of the application, the support tube can include stainless steel and aluminum alloy. In an embodiment of the application, the support tube has good heat conduction performance, and the thermal conductivity of the support tube is greater than or equal to 15 W / (m·K). In an embodiment of the application, when the support tube is stainless steel, the thermal conductivity of the support tube is 15 W / (m·K)-30 W / (m·K). In an embodiment of the application, when the support tube is aluminum alloy, the thermal conductivity of the support tube is 155 W / (m·K)-236 W / (m·K). In an embodiment of the application, the thickness of the support tube is 0.05 mm-0.3 mm. In an embodiment of the application, the thickness of the support tube is 0.1 mm-0.2 mm. In an embodiment of the application, the thickness of the support tube is 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0058] In an embodiment of the application, in the step of cutting the heat-insulating region on the support tube, the heat-insulating region is prepared on the support tube by mechanical processing or laser cutting. In an embodiment of the application, the mechanical processing or laser cutting includes computer numerical control precision mechanical processing or laser cutting.

[0059] In an embodiment of the present application, the heat-conducting zones are multiple, and at least one heat-blocking zone is arranged between any two adjacent heat-conducting zones.

[0060] In an embodiment of the present application, the heat-blocking zones are multiple, and the multiple heat-blocking zones are distributed along the axis of the support tube.

[0061] In an embodiment of the present application, the heat-blocking zone comprises a connecting portion and a recessed portion, the recessed portion is a through hole or a groove, and the connecting portion and the recessed portion are arranged adjacently. In an embodiment of the present application, the recessed portion is used to block the heat conduction of the heat-conducting zones separated by the heat-blocking zone on the support tube, and the connecting portion makes the heat-conducting zones separated by the heat-blocking zone on the support tube remain connected in structure.

[0062] In an embodiment of the present application, the heat-blocking zone comprises a broken line, and the broken line extends along the circumferential direction of the support tube. It should be noted that the "broken line" here can be understood as the pattern formed by the structure of the heat-blocking zone on the outer surface of the support tube. For example, when the heat-blocking zone comprises a connecting portion and a recessed portion, the connecting portion forms a solid line segment on the surface of the support tube, the recessed portion forms a broken line segment on the surface of the support tube, and the solid line segment and the broken line segment are arranged alternately along the circumferential direction of the support tube on the outer surface of the support tube to form a "broken line". In an embodiment of the present application, the heat-blocking zone between the two adjacent heat-conducting zones comprises multiple broken lines, so that the heat-blocking effect of the heat-blocking zone on the heat-conducting zone is better.

[0063] In an embodiment of the present application, the recessed portion extends along an arc or a spiral line in the circumferential direction of the support tube.

[0064] In an embodiment of the present application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm. In an embodiment of the present application, the length of the connecting portion in the circumferential direction of the support tube is 0.5mm-2mm. In an embodiment of the present application, the length of the connecting portion in the circumferential direction of the support tube is 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm. The connecting portion makes the heat-conducting zones on the support tube remain connected in structure.

[0065] In an embodiment of the present application, the length of the recessed portion in the circumferential direction of the support tube is 0.05mm-0.5mm. In an embodiment of the present application, the length of the recessed portion in the circumferential direction of the support tube is 0.1mm-0.3mm. In an embodiment of the present application, the length of the recessed portion in the circumferential direction of the support tube is 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm.

[0066] In an embodiment of the present application, the total length of all the connecting portions in the circumferential direction of the support tube accounts for less than or equal to 50% of the circumference of the support tube, so that the connecting portions can ensure that the heat-conducting zones separated by the heat-blocking zones are structurally connected and have a certain connection strength. In an embodiment of the present application, the circumference of the support tube refers to the circumference of the cross section of the support tube.

[0067] In an embodiment of the present application, the number of the connecting portions is greater than or equal to 3, so that the connecting portions can ensure that the heat-conducting zones separated by the heat-blocking zones are structurally connected and have a certain connection strength.

[0068] In an embodiment of the present application, in the step of arranging the heat-blocking zones on the support tube, the step includes arranging a heat-insulating material on the heat-blocking zones. Arranging the heat-insulating material on the heat-blocking zones can seal the heat-blocking zones with the heat-insulating material, so that the heat-blocking zones have better structural strength, air is prevented from flowing out of the heat-blocking zones, and the heat-blocking zones have good heat-insulating effect.

[0069] In an embodiment of the present application, the thermal conductivity of the heat-insulating material is 1.4 W / (m·K)-4 W / (m·K), and the thermal conductivity of the heat-insulating material is smaller than that of the support tube, so that the heat of the heat-conducting zones separated by the heat-blocking zones on the support tube is not easily conducted to each other.

[0070] In an embodiment of the present application, in the step of coating the heat-generating coating on the outer surface of the support tube, the step specifically includes coating a first insulating layer on the outer surface of the support tube. It should be noted that the slurry constituting the first insulating layer is coated on the outer surface of the support tube. Considering the flowability of the slurry, the slurry can seal the heat-blocking zones to achieve the purpose of sealing. It can be understood that the first insulating layer can seal the heat-blocking zones, so that the support tube forms a sealed tube structure, preventing air in the support tube from leaking from the heat-blocking zones. In this way, the sealing step and the coating of the first insulating layer can be integrated into the same step, so that a separate process step of sealing the support tube can be omitted, simplifying the process of the heating assembly. In an embodiment of the present application, in order to ensure the sealing effect of the first insulating layer on the heat-blocking zones, multiple layers of the first insulating layer can be coated.

[0071] In an embodiment of the present application, in the step of coating the heat-generating coating on the outer surface of the support tube, the step further includes coating a heat-generating layer on the first insulating layer. In an embodiment of the present application, the heat-generating layer includes a plurality of sub-heat-generating layers, and adjacent two sub-heat-generating layers have a spacing zone therebetween, and the spacing zone is arranged opposite to the heat-blocking zone. In an embodiment of the present application, the sub-heat-generating layer is arranged opposite to the heat-conducting zone, so that the heat of the sub-heat-generating layer can be conducted to the corresponding aerosol generating article through the heat-conducting zone.

[0072] In an embodiment of the present application, the resistance of the sub-heating layer is 0.35Ω-1.0Ω. In an embodiment of the present application, the resistance of the sub-heating layer is 0.45Ω-0.8Ω. In an embodiment of the present application, the resistance of the sub-heating layer is 0.35Ω, 0.40Ω, 0.45Ω, 0.50Ω, 0.6Ω, 0.65Ω, 0.8Ω, 0.9Ω, 1.0Ω.

[0073] In an embodiment of the present application, in the step of coating the heating layer on the outer surface of the support tube, further comprising: coating a second insulating layer on the heating layer. The heating layer is located between the first insulating layer and the second insulating layer, so that the heating layer is insulated from the outside and does not leak electricity.

[0074] In an embodiment of the present application, the thickness of the first insulating layer or the second insulating layer is 15μm-30μm. In an embodiment of the present application, the thickness of the first insulating layer is 15μm-30μm. In an embodiment of the present application, the thickness of the first insulating layer is 15μm, 18μm, 20μm, 25μm, 30μm. In an embodiment of the present application, the thickness of the second insulating layer is 15μm-30μm. In an embodiment of the present application, the thickness of the second insulating layer is 15μm, 18μm, 20μm, 25μm, 30μm.

[0075] In an embodiment of the present application, the thermal conductivity of the first insulating layer and the second insulating layer is 1.4W / (m·K)-4W / (m·K), so that the heat generated by one sub-heating layer is not easily transmitted to the heat conduction area of the support tube corresponding to another sub-heating layer, and the heat generated by the heating layer is not easily transmitted to the shell of the aerosol generating device.

[0076] In an embodiment of the present application, in the step of coating the heating layer on the first insulating layer, comprising: disposing a first electrode and a second electrode on the first insulating layer, the first electrode and the second electrode are electrically connected to the heating layer. In an embodiment of the present application, the plurality of sub-heating layers are electrically connected to the first electrode and the second electrode. In an embodiment of the present application, the first electrode and the second electrode are oppositely arranged, each sub-heating layer includes two arc-shaped heating surfaces located between the first electrode and the second electrode, each sub-heating layer includes two arc-shaped heating surfaces, so that when the heating layer is printed, the number of layers of the heating layer does not exceed one layer, thereby ensuring that the resistance distribution of the heating layer is uniform, so that the heating of the heating layer is more uniform.

[0077] In one embodiment of the present application, the preparation method of the heating assembly comprises: providing a preform tube, the preform tube comprising a plurality of support tubes connected in sequence; providing a heat-blocking region on the support tubes; after coating the heating layer on the outer surface of the support tubes, further comprising cutting the preform tube so that the plurality of support tubes are separated from each other. By providing the heat-blocking region on the preform tube comprising a plurality of support tubes and then coating the heating layer, the plurality of support tubes can simultaneously complete the processes of providing the heat-blocking region and coating the heating layer, thereby greatly improving the preparation efficiency of the heating assembly and shortening the process time.

[0078] One embodiment of the present application provides a heating assembly 10, comprising: a support tube 1, the support tube 1 comprising a heat-blocking region 11 and a heat-conducting region 12, the heat-blocking region 11 being used to block the heat conduction between adjacent heat-conducting regions 12; and a heating layer 2, the heating layer 2 being provided on the outer surface of the support tube 1 and covering the heat-blocking region 11 and at least one heat-conducting region 12.

[0079] In the present application, the heat-blocking region 11 is first provided on the support tube 1, and then the heating layer 2 is coated on the outer surface of the support tube 1. In this way, the heat-blocking region 11 can slow down the heat transfer and concentrate the heat in a predetermined area. At the same time, since the heat-blocking region 11 is provided on the support tube 1, there is no need to process a heat-blocking structure on the heating layer, so that the heating layer 2 can be a complete coating structure, thereby avoiding the micro-cracks formed by mechanical processing on the heating layer 2. In addition, the complete coating structure has a complete layered structure, which has stronger compression resistance.

[0080] In some embodiments, the heating layer 2 also has a sealing effect on the heat-blocking region 11, so that the support tube 1 has good sealing performance, and the heating assembly 10 has good heating effect on the aerosol generating article, so that the user can obtain a good smoking taste.

[0081] In one embodiment of the present application, the heat-conducting region 12 is a plurality of heat-conducting regions 12, and at least one heat-blocking region 11 is provided between any two adjacent heat-conducting regions 12. In one embodiment of the present application, the number of heat-conducting regions 12 is two or three.

[0082] In one embodiment of the present application, the heat-blocking region 11 is a plurality of heat-blocking regions 11, and the plurality of heat-blocking regions 11 are distributed along the axis of the support tube 1.

[0083] In an embodiment of the present application, the heat blocking area 11 comprises a broken line extending along the circumferential direction of the support tube 1. It should be noted that the "broken line" herein can be understood as a pattern formed by the structure of the heat blocking area 11 on the outer surface of the support tube 1. For example, when the heat blocking area 11 comprises the connecting portion 111 and the recessed portion 112, the connecting portion 111 forms a solid line segment on the surface of the support tube 1, and the recessed portion 112 forms a broken line segment on the surface of the support tube 1. The solid line segment and the broken line segment are arranged alternately along the circumferential direction of the support tube 1 on the outer surface of the support tube 1 to form the "broken line". In some embodiments, there can be multiple broken lines in one heat blocking area 11. The multiple broken lines are arranged at intervals along the axial direction of the support tube 1, so that the heat blocking effect of the heat blocking area 11 on the heat conducting area 12 is better.

[0084] In an embodiment of the present application, the heat blocking area 11 comprises the connecting portion 111 and the recessed portion 112, and the recessed portion 112 is a through hole or a groove. The connecting portion 111 and the recessed portion 112 are arranged adjacently.

[0085] In an embodiment of the present application, the recessed portion 112 extends along an arc or a spiral line in the circumferential direction of the support tube 1.

[0086] In an embodiment of the present application, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.3mm-2mm. In an embodiment of the present application, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.5mm-2mm. In an embodiment of the present application, the length of the connecting portion 111 in the circumferential direction of the support tube 1 is 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm. The connecting portion 111 ensures that the heat conducting areas 12 on the support tube 1 are structurally connected.

[0087] In an embodiment of the present application, the length of the recessed portion 112 in the circumferential direction of the support tube 1 is 0.05mm-0.5mm. In an embodiment of the present application, the length of the recessed portion 112 in the circumferential direction of the support tube 1 is 0.1mm-0.3mm. In an embodiment of the present application, the length of the recessed portion 112 in the circumferential direction of the support tube 1 is 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm.

[0088] In an embodiment of the present application, the total length of all the connecting portions 111 in the circumferential direction of the support tube 1 accounts for less than or equal to 50% of the circumference of the support tube 1, so that the connecting portions 111 can ensure that the heat conducting areas 12 separated by the heat blocking area 11 are structurally connected and have a certain connection strength. In an embodiment of the present application, the circumference of the support tube 1 refers to the circumference of the cross section of the support tube 1.

[0089] In an embodiment of the present application, the number of the connecting portions 111 is greater than or equal to 3, so that the connecting portions 111 can ensure that the heat-conducting zones 12 separated by the heat-blocking zones 11 are structurally connected and have a certain connection strength.

[0090] In an embodiment of the present application, the heat-blocking zones 11 are provided with a heat insulation material, which can seal the heat-blocking zones 11, so that the heat-blocking zones 11 have better structural strength, air leakage from the heat-blocking zones 11 is avoided, and good heat insulation effect is achieved.

[0091] In an embodiment of the present application, the thermal conductivity of the heat insulation material is 1.4 W / (m·K)-4 W / (m·K), which is smaller than the thermal conductivity of the support tube 1, so that the heat of the heat-conducting zones 12 separated by the heat-blocking zones 11 on the support tube 1 is not easily conducted to each other.

[0092] In an embodiment of the present application, the heat-generating coating 2 comprises a first insulating layer 21, a heat-generating layer 22 and a second insulating layer 23 which are sequentially stacked, the first insulating layer 21 is arranged on the outer surface of the support tube 1, and the heat-generating layer 22 is arranged between the first insulating layer 21 and the second insulating layer 23. The first insulating layer 21 can seal the heat-blocking zones 11 and prevent air in the support tube 1 from leaking from the heat-blocking zones. The heat-generating layer 22 is located between the first insulating layer 21 and the second insulating layer 23, so that the heat-generating layer 22 is insulated from the outside and will not leak electricity. In an embodiment of the present application, in order to ensure the sealing effect of the first insulating layer 21 on the heat-blocking zones 11, multiple first insulating layers 21 can be coated.

[0093] In an embodiment of the present application, the heat-generating layer 22 comprises a plurality of sub-heat-generating layers 221, and each two adjacent sub-heat-generating layers 221 have a spacing zone 222, the spacing zone 222 is arranged opposite to the heat-blocking zone 11, and the sub-heat-generating layer 221 is arranged opposite to the heat-conducting zone 12. In an embodiment of the present application, the sub-heat-generating layer 221 is arranged opposite to the heat-conducting zone 12, so that the heat of the sub-heat-generating layer 221 can be conducted to the corresponding aerosol generating article through the heat-conducting zone 12.

[0094] In an embodiment of the present application, the spacing zone 222 refers to a region where no sub-heat-generating layer 221 is arranged, and the spacing zone 222 will not generate heat.

[0095] In an embodiment of the present application, the resistance of the sub-heat-generating layer 221 is 0.35 Ω-1.0 Ω. In an embodiment of the present application, the resistance of the sub-heat-generating layer 221 is 0.45 Ω-0.8 Ω. In an embodiment of the present application, the resistance of the sub-heat-generating layer 221 is 0.35 Ω, 0.40 Ω, 0.45 Ω, 0.50 Ω, 0.6 Ω, 0.65 Ω, 0.8 Ω, 0.9 Ω, 1.0 Ω.

[0096] In an embodiment of the present application, the thickness of the first insulating layer 21 or the second insulating layer 23 is 15-30 μm. In an embodiment of the present application, the thickness of the first insulating layer 21 is 15-30 μm. In an embodiment of the present application, the thickness of the first insulating layer 21 is 15 μm, 18 μm, 20 μm, 25 μm, or 30 μm. In an embodiment of the present application, the thickness of the second insulating layer 23 is 15-30 μm. In an embodiment of the present application, the thickness of the second insulating layer 23 is 15 μm, 18 μm, 20 μm, 25 μm, or 30 μm.

[0097] In an embodiment of the present application, the thermal conductivity of the first insulating layer and the second insulating layer is 1.4-4 W / (m·K), so that the heat generated by one sub-heating layer 221 is not easily transferred to the heat conduction area 12 of the support tube 1 corresponding to another sub-heating layer 221, and the heat generated by the heating layer 2 is not easily transferred to the shell of the aerosol generating device 100.

[0098] In an embodiment of the present application, the support tube 1 comprises metal or alloy. In an embodiment of the present application, the support tube 1 comprises stainless steel and aluminum alloy. In an embodiment of the present application, the support tube 1 has good thermal conductivity, and the thermal conductivity of the support tube 1 is greater than or equal to 15 W / (m·K). In an embodiment of the present application, when the support tube 1 is stainless steel, the thermal conductivity of the support tube 1 is 15-30 W / (m·K). In an embodiment of the present application, when the support tube 1 is aluminum alloy, the thermal conductivity of the support tube 1 is 155-236 W / (m·K). In an embodiment of the present application, the thickness of the support tube 1 is 0.05-0.3 mm. In an embodiment of the present application, the thickness of the support tube 1 is 0.1-0.2 mm. In an embodiment of the present application, the thickness of the support tube 1 is 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0099] In an embodiment of the present application, the first electrode 24 and the second electrode 25 are electrically connected to the heating layer 22. In an embodiment of the present application, the plurality of sub-heating layers 221 are electrically connected to the first electrode 24 and the second electrode 25. In an embodiment of the present application, the first electrode 24 and the second electrode 25 are oppositely arranged, and each sub-heating layer 221 comprises two arc-shaped heating surfaces between the first electrode 24 and the second electrode 25. Each sub-heating layer 221 comprises two arc-shaped heating surfaces, so that when the heating layer 22 is printed, the number of layers of the heating layer 22 does not exceed one layer, thereby ensuring that the resistance distribution of the heating layer 22 is uniform, and the heating of the heating layer 22 is more uniform.

[0100] One embodiment of the present application provides an aerosol generating device 100 including a battery assembly 20 and the above-described heating assembly 10, the battery assembly 20 providing power to the heating assembly 10.

[0101] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification, and further, those skilled in the art can make improvements or modifications according to the above description, and all such improvements and modifications should belong to the protection scope of the claims of the present application.

Claims

1. A heating assembly, characterized by, The application relates to a heating assembly, comprising: a support tube, the support tube comprising heat-conducting zones and heat-blocking zones, the heat-blocking zones being configured to block heat conduction between adjacent heat-conducting zones; a heating coating arranged on the outer surface of the support tube and covering the heat-blocking zones and at least one heat-conducting zone.

2. The heating assembly of claim 1, wherein, The heat-conducting zones are multiple, and at least one heat-blocking zone is arranged between any two adjacent heat-conducting zones.

3. The heating assembly of claim 1, wherein, The heat-blocking zones are multiple, and the multiple heat-blocking zones are distributed along the axis of the support tube.

4. The heating assembly of claim 1, wherein, The heat-blocking zone comprises a connecting portion and a recessed portion, the recessed portion being a through hole or a groove, and the connecting portion and the recessed portion are arranged adjacently.

5. The heating assembly of claim 4, wherein, The recessed portion extends along an arc or a spiral line in the circumferential direction of the support tube.

6. The heating assembly of claim 4, wherein, The length of the connecting portion in the circumferential direction of the support tube is 0.3mm-2mm; and / or the length of the recessed portion in the circumferential direction of the support tube is 0.05mm-0.5mm.

7. The heating assembly of claim 4, wherein, The total length of all the connecting portions in the circumferential direction of the support tube accounts for less than or equal to 50% of the circumference of the support tube.

8. The heating assembly of claim 4, wherein, The number of the connecting portions is greater than or equal to 3.

9. The heating assembly of claim 1, wherein, The heat-blocking zone is provided with a heat insulation material.

10. The heating assembly of claim 1, wherein, The heating coating comprises a first insulating layer, a heating layer and a second insulating layer arranged in sequence, the first insulating layer being arranged on the outer surface of the support tube, and the heating layer being arranged between the first insulating layer and the second insulating layer.

11. The heating assembly of claim 10, wherein, The heating layer comprises multiple sub-heating layers, and two adjacent sub-heating layers have a spacing zone, the spacing zone being arranged opposite to the heat-blocking zone, and the sub-heating layer being arranged opposite to the heat-conducting zone.

12. The heating assembly of claim 10, wherein, The thickness of the first insulating layer or the second insulating layer is 15um-30um.

13. The heating assembly of claim 1, wherein, The thickness of the support tube is 0.05mm-0.3mm; and / or the thickness of the support tube is 0.1mm-0.2mm.

14. The heating assembly of claim 10, wherein, The heating coating comprises a first electrode and a second electrode arranged oppositely, and the first electrode and the second electrode are electrically connected with the heating layer.

15. An aerosol-generating device comprising: The application further relates to a battery assembly for providing electric energy for the heating assembly.

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