Heating assembly and aerosol generating device

Abstract

The utility model relates to a heating assembly and an aerosol generating device. The heating assembly comprises a base body; the first conductive layer is supported by the base body, and a first coupling region is arranged on the first conductive layer; the first heating layer is supported by the base body and comprises a first coverage area and a first side edge which defines at least part of the boundary of the first coverage area; the second heating layer is supported by the base body and comprises a second coverage area and a second side edge which defines at least part of the boundary of the second coverage area; the first coverage area and the second coverage area are arranged at an interval and respectively cover different areas of the first conductive layer, so that the first heating layer and the second heating layer are electrically connected with the first conductive layer; wherein the first coupling region is not covered by the first coverage region and the second coverage region and is defined between the first side edge and the second side edge, and a part of at least one of the first side edge and the second side edge is recessed towards a direction far away from the other side edge, so that the exposed area of the first coupling region is increased.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of aerosol generation, and in particular to a heating component and an aerosol generating device. Background Art

[0002] An aerosol generating device is a device that includes a heating component and heats a smoking article through the heating component so that the smoking article generates smoke without burning.

[0003] In some exemplary prior art, the heating assembly includes two heating layers and an electrode layer electrically connecting the two heating layers, and also includes a substrate supporting the heating layer and the electrode layer, the electrode layer having a coupling portion for electrically connecting to a power source; the substrate has a heating zone, and the heating layer is arranged on the heating zone, so that when the heating assembly is working, the heating zone has a relatively high temperature, and the size of the heating zone and the uniformity of the heat distribution affect the heating effect on the tobacco product. After the heating paste and the electrode paste are arranged on the substrate by thick film printing or PVD, CVD, both need to be sintered. However, the sintering temperature of the heating layer formed by the heating paste cannot exceed 400°C, while the sintering temperature of the electrode layer formed by the electrode paste needs to be as high as 800°C. Therefore, it is necessary to form the electrode layer first, and then form the heating layer, which results in the heating layer needing to cover at least part of the electrode layer, and in order to electrically connect the electrode layer to the power source, the coupling portion needs to be exposed, and in order to prevent the electrode of the power source from contacting the heating layer to cause a large contact resistance, the coupling portion needs to have a large exposed area.

[0004] If the coupling part is located in the heating zone between the two heating layers, the distance between the two heating layers will be larger, so that a large area on the heating zone is not covered by the heating layer, resulting in uneven heat distribution on the heating zone; if the electrode layer is partially arranged in the heating zone and covered by the heating layer, and the electrode layer is extended so that the coupling part is arranged outside the heating layer, so that the coupling part is closer to the end of the substrate relative to the heating layer, it is necessary to set a larger non-heating area on the substrate to accommodate the coupling part, so that the coverage area of ​​the heating layer on the substrate is reduced, which will still lead to uneven heat distribution on the substrate, which is not conducive to uniform and sufficient heating of the tobacco products. Utility Model Content

[0005] The purpose of the present application is to provide a heating component and an aerosol generating device, which can reduce the area of ​​the region on the substrate that is not covered by the heating layer.

[0006] A heating assembly provided in an embodiment of the present application includes:

[0007] matrix;

[0008] A first conductive layer, supported by the substrate, wherein the first conductive layer has a first coupling region;

[0009] a first heating layer, supported by the substrate, comprising a first cover area and a first side edge defining at least a portion of the first cover area;

[0010] a second heating layer, supported by the substrate, comprising a second cover area and a second side edge defining at least a portion of the second cover area;

[0011] The first covering area and the second covering area are arranged at intervals and respectively cover different areas of the first conductive layer, so that the first heating layer and the second heating layer are both electrically connected to the first conductive layer;

[0012] The first coupling area is not covered by the first covering area and the second covering area and is defined between the first side and the second side, and at least one of the first side and the second side is partially recessed in a direction away from the other, thereby increasing the exposed area of ​​the first coupling area.

[0013] As an example, the first side includes a first section and a second section, and an average distance between the first section and the second side is smaller than an average distance between the second section and the second side;

[0014] Wherein, an average distance between the first section and the second side is less than or equal to 1 mm.

[0015] As an example, the first side further includes a third section, the second section is located between the third section and the first section, and an average distance between the first section and the second side is substantially equal to an average distance between the third section and the second side.

[0016] As an example, the recessed portion of the first side and the recessed portion of the second side are both tangent to a common tangent circle, the diameter of the common tangent circle is greater than or equal to 2 mm, and the diameter of the common tangent circle is less than or equal to the width of the first conductive layer; or

[0017] The recessed portion of the first side and the recessed portion of the second side are located on the same circumference, the diameter of the circle is greater than or equal to 2 mm, and the diameter of the circle is less than or equal to the width of the first conductive layer.

[0018] As an example, the width of the first conductive layer is less than or equal to 3 mm;

[0019] The maximum width of the first coverage area is greater than or equal to 1 mm; and / or

[0020] The maximum width of the second covering area is greater than or equal to 1 mm.

[0021] As an example, the first heating layer and the second heating layer are arranged on the same surface of the substrate, and the first heating layer and the second heating layer are arranged at intervals in the first direction;

[0022] The first conductive layer extends along the first direction or along a second direction different from the first direction.

[0023] As an example, the first heating layer and the second heating layer are arranged on the same surface of the substrate, and the first conductive layer extends along a first direction;

[0024] Wherein, the first heating layer and the second heating layer are arranged at intervals in a second direction different from the first direction.

[0025] As an example, the first heating layer and the second heating layer are both arc-shaped and arranged opposite to each other.

[0026] As an example, the heating assembly further includes a second conductive layer, the second conductive layer having a second coupling area not covered by the first heating layer and the second heating layer;

[0027] Wherein, the second conductive layer electrically connects the first heating layer and the second heating layer.

[0028] As an example, the first heating layer further includes a third covering area and a third side edge defining at least a portion of the boundary of the third covering area;

[0029] The second heating layer further comprises a fourth covering area and a fourth side edge defining at least a portion of the boundary of the fourth covering area;

[0030] The third covering area and the fourth covering area are arranged at intervals and respectively cover different areas of the second conductive layer, so that the first heating layer and the second heating layer are both electrically connected to the second conductive layer;

[0031] The second coupling area is defined between the third side and the fourth side.

[0032] As an example, a portion of at least one of the third side and the fourth side is recessed in a direction away from the other side, thereby increasing an exposed area of ​​the second coupling region.

[0033] As an example, the heating component further includes a second conductive layer having a second coupling area and a third conductive layer having a third coupling area, the second conductive layer is electrically connected to the first heating layer, and the third conductive layer is electrically connected to the second conductive layer.

[0034] As an example, the first heating layer forms a closed ring along a second direction different from the first direction; and / or

[0035] The second heating layer forms a closed ring along a second direction different from the first direction; and / or

[0036] The first conductive layer forms a closed loop along a second direction different from the first direction.

[0037] As an example, the substrate is configured in a tubular shape, and has an accommodating cavity therein for accommodating at least part of the aerosol generating article.

[0038] An aerosol generating device provided in an embodiment of the present application includes a power supply component and the heating component, wherein the power supply component includes a power supply and a plurality of electrodes, wherein the power supply is electrically connected to the heating component through the plurality of electrodes to supply power to the heating component, and wherein one of the electrodes is electrically connected to the first coupling area.

[0039] An aerosol generating device provided in an embodiment of the present application includes a power supply component and the heating component, wherein the power supply component includes a power supply and a plurality of electrodes, wherein the power supply is electrically connected to the heating component through the plurality of electrodes to supply power to the heating component, and wherein one of the electrodes is electrically connected to the first coupling area.

[0040] The above heating component and aerosol generating device include a first heating layer having a first covering area, a first heating layer having a second covering area and a first conductive layer having a first coupling area, the first covering area and the second covering area respectively cover different areas of the first conductive layer, so that the first heating layer and the second heating layer are both electrically connected to the first conductive layer, the first heating layer also has a first side edge defining at least a portion of the boundary of the first covering area, and the second heating layer also has a first side edge defining at least a portion of the boundary of the second covering area; the first coupling area is not covered by the first covering area and the second covering area and is defined between the first side edge and the second side edge, and a portion of at least one of the first side edge and the second side edge is recessed in a direction away from the other, thereby increasing the exposed area of ​​the first coupling area. Thus, the interval between the section corresponding to the first coupling area on at least one of the first side and the second side and the other can be larger, so that the first coupling area has a larger exposed area to be electrically connected to the electrode of the power supply component, and the interval between the other sections not corresponding to the first coupling area on at least one of the first side and the second side and the other can be smaller, so that the area of ​​the area not covered by the heating layer on the substrate can be reduced while ensuring reliable electrical connection between the first conductive layer and the first heating layer and the second heating layer. This is beneficial to promoting uniform heat distribution on the substrate and uniform heating of the aerosol generating product. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0042] Figure 1 is a schematic diagram of an aerosol generating device provided in one embodiment of the present application;

[0043] Figure 2 is a schematic diagram of a heating assembly provided in one embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the first heating layer and the second heating layer in the heating assembly provided in one embodiment of the present application;

[0045] Figure 4 is a schematic diagram of a heating assembly provided in another embodiment of the present application;

[0046] Figure 5 It is a schematic diagram of the first heating layer and the second heating layer in the heating assembly provided in one embodiment of the present application;

[0047] Figure 6 is a schematic diagram of a heating assembly provided in yet another embodiment of the present application;

[0048] Figure 7 It is a schematic diagram of the first heating layer and the second heating layer in the heating assembly provided in one embodiment of the present application;

[0049] In the figure:

[0050] 100. aerosol generating product; 101. aerosol generating substrate; 102. filter tip;

[0051] 200, aerosol generating device; 210, power supply; 220, heating component; 221, substrate; 2211, accommodating cavity; 222, first heating layer; 2221, first side; 2222, third side; 223, second heating layer; 2231, second side; 2232, fourth side; 224, first conductive layer; 2241, first coupling area; 1A, first section; 2A, second section; 3A, third section; 1B, fourth section; 2B, fifth section; 3B, sixth section; 225, second conductive layer; 2251, second coupling area; 226, third conductive layer; 2261, third coupling area. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] The terms "first", "second", "third" in the present application are only used for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or implicitly indicating the quantity or order of the indicated technical features. In the present application embodiment, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement between the components under a certain specific posture (as shown in the accompanying drawings), and if the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be one or more central elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0056] Please refer to Figure 1 One embodiment of the present application provides an aerosol generating device 200, which is a device 200 that can be connected to an aerosol generating article 100 and can interact with the aerosol generating article 100 to make the aerosol generating article 100 generate aerosol.

[0057] Aerosol generation article 100 comprises aerosol generation substrate 101, and aerosol generation substrate 101 is a kind of material that can produce aerosol under the effect of temperature rise or ultrasonic wave, microwave.Aerosol generation substrate 101 can be the volatile compound that intention is heated rather than burning to release to form aerosol.Aerosol formation substrate 101 can be solid form, for example can be the integrated thing that tobacco shred, tobacco leaf or cigarette particle phase gather and form.Aerosol formation substrate 101 can comprise tobacco-containing material, and described tobacco-containing material contains the volatile tobacco flavor compound that releases from described substrate when heating, or described tobacco-containing material is the material that contains nicotine.Aerosol formation substrate 101 can comprise containing non-tobacco material.Aerosol formation substrate 101 can contain tobacco-containing material and non-tobacco material simultaneously.

[0058] In such Figure 1 In the illustrated embodiment, the aerosol-generating article 100 further comprises a filter 102. After the aerosol-generating article 100 is coupled to the aerosol-generating device 200, the filter 102 is exposed outside the aerosol-generating device 200 for the user to hold in the mouth, and the user inhales the aerosol generated by the aerosol-forming substrate 101 by sucking on the filter 102. In other embodiments, the aerosol-generating device comprises a mouthpiece for the user to hold in the mouth, and after the aerosol-generating article is coupled to the aerosol-generating device, the aerosol-generating article may be completely hidden in the aerosol-generating device, and the user inhales the aerosol generated by the aerosol-forming substrate 101 by sucking on the mouthpiece.

[0059] The aerosol generating device 200 includes a power supply component 210 and a heating component 220. The power supply component 210 may include a power supply and a plurality of electrodes electrically connected to the power supply. The power supply may include any suitable battery, such as a lithium battery. The electrodes may be electrically connected to the heating component 220 by welding or by abutting, so as to supply the power provided by the power supply to the heating component 220, so that the heating component 22 generates heat to heat the aerosol generating article 100. When the electrode is electrically connected to the heating component 220 by abutting, the electrode and the heating component 220 are electrically connected by a squeezing force or an elastic force. For example, the electrode includes an elastic arm and a contact point disposed on the elastic arm. The elastic arm generates an elastic force by elastic deformation to keep the contact point electrically connected to the heating component 220.

[0060] In one embodiment of the present application, reference may be made to Figure 2 , Figure 4 and Figure 6 The heating component 220 includes a substrate 221, a first heating layer 222 and a second heating layer 223. The substrate 221 is used to support the first heating layer 222 and the second heating layer 223. The substrate 221 may include a material that can withstand a high temperature of 800°C. For example, the substrate 221 may include at least one of metal, ceramic, silicon dioxide, aluminum oxide and quartz.

[0061] In one embodiment of the present application, the parameter Figure 2 , Figure 4 and Figure 6 The substrate 221 is constructed in a tubular shape and has a accommodating cavity 2211 inside for accommodating at least a portion of the aerosol generating product 100. When the aerosol generating product 100 is coupled to the aerosol generating device 200, at least a portion of the aerosol generating substrate 101 is located in the accommodating cavity 2211, and at least a portion of the aerosol generating substrate 101 can be heated in the accommodating cavity 2211 by the energy released by the first heating layer 222 and the second heating layer 223.

[0062] It should be noted that, in other embodiments, the aerosol generating device includes a receiving tube for receiving at least a portion of an aerosol generating substrate, and at least a portion of the substrate extends in the receiving tube along the longitudinal direction of the receiving tube, so that when the aerosol generating article is coupled to the aerosol generating device, at least a portion of the substrate can be inserted into the aerosol generating substrate, so that the first heating layer and the second heating layer can heat the aerosol generating substrate inside the aerosol generating article.

[0063] In one embodiment of the present application, the first heating layer 222 and the second heating layer 223 are arranged on the surface of the substrate 221 by printing, physical deposition or chemical deposition.

[0064] The first heating layer 222 may include a resistor layer, which can generate Joule heat when powered, and the resistor layer heats the aerosol generating article 100 mainly by heat conduction. When the substrate 221 is configured as a tube, the first heating layer 222 may be arranged on the outer surface of the tubular substrate 221, and in order to reduce power consumption, the tubular substrate 221 may be made of a thermally conductive material. The thermally conductive material may be understood as a material having a thermal conductivity of at least 10 W / (m·k), preferably at least 40 W / (m·k), more preferably at least 100 W / (m·k), more preferably at least 150 W / (m·k), and most preferably at least 200 W / (m·k) at 23° C. and a relative humidity of 50%. Suitable thermally conductive materials include, but are not limited to, graphite, graphene, aluminum, copper, zinc, steel, silver, thermally conductive polymers, or any combination or alloy thereof.

[0065] The first heating layer 222 may include an infrared layer, which can radiate infrared rays when powered on or excited, and the infrared layer mainly heats the aerosol generating article 100 by means of thermal radiation. When the substrate 221 is configured in a tubular shape, the first heating layer 222 may be arranged on the outer surface of the tubular substrate 221. Based on this, the tubular substrate 221 may be made of a material such as quartz that allows infrared rays to pass through.

[0066] The thickness d of the first heating layer 222 may satisfy: 100 nm≤d≤30 μm, or 300 nm≤d≤3 μm, or 500 nm≤d≤2 μm, or 800 nm≤d≤1 μm.

[0067] The first heating layer 222 and the second heating layer 223 may have substantially the same thickness. The first heating layer 222 and the second heating layer 223 may have substantially the same resistivity. The first heating layer 222 and the second heating layer 223 may be heating layers of the same type, for example, both are infrared layers. Of course, the heating types of the two may also be different.

[0068] When the substrate 221 is made of a conductive material, before arranging the first heating layer 222 and the second heating layer 223, the substrate 221 needs to be surface treated so that the surface of the substrate 221 has an insulating layer, and then at least a portion of the first heating layer 222 and / or at least a portion of the second heating layer 223 is arranged on the insulating layer. When the substrate 221 is made of an insulating material, at least a portion of the first heating layer 221 and / or at least a portion of the second heating layer 222 can be directly arranged on the surface of the substrate 221.

[0069] In one embodiment of the present application, reference may be made to Figure 2-Figure 7 The first heating layer 222 and the second heating layer 223 are arranged at intervals, and at least a portion of the first heating layer 222 and at least a portion of the second heating layer 223 are arranged at intervals on the substrate 221, so that the first heating layer 222 and the second heating layer 223 can heat different areas of the aerosol generating article 100.

[0070] The heating component 220 also includes a conductive layer, which is used to electrically connect to the electrode of the power supply component 210. The resistivity of the conductive layer is much lower than that of the heating layer, thereby reducing the contact resistance when the heating component 220 is electrically connected to the electrode. The conductive layer can be arranged on the surface of the substrate 221 by printing, physical deposition or chemical deposition. The silver content in the conductive layer can be higher than the silver content in the heating layer. The conductive layer can be made of silver paste with a high silver content.

[0071] The first heating layer 222 and the second heating layer 223 are both electrically connected to the conductive layer, and draw power from the power source through the conductive layer.

[0072] Since the sintering temperature required to form the conductive layer is higher than the sintering temperature required to form the heating layer, the conductive layer is formed before the heating layer. That is, the conductive layer is first formed on the substrate 221, and then the heating layer is formed on the substrate 221. In order to form a reliable electrical connection between the conductive layer and the heating layer and reduce the contact resistance between the two, the heating layer needs to be partially covered on the conductive layer, and the overlapping area of ​​the heating layer and the conductive layer needs to have a sufficient overlapping width, and the sufficient overlapping width is used to ensure that there is a sufficient overlapping area between the two.

[0073] However, since the resistivity of the conductive layer is much smaller than that of the heating layer, the current is mainly concentrated on the conductive layer in the area where the heating layer and the conductive layer overlap, resulting in low heating efficiency and low heating temperature in this area. Therefore, in order to improve the heating efficiency, the overlapping width and overlapping area of ​​the area where the heating layer and the conductive layer overlap should not be too large.

[0074] Based on this, in one embodiment, the overlapping width L1 of at least a portion of the area where the heating layer and the conductive layer overlap each other is at least 1 mm.

[0075] When the heating assembly 220 is working, the temperature of the area with the working heating layer in the heating assembly 220 is higher than the temperature of the area without the heating layer. Obviously, if there are too many conductive layers and the area of ​​the conductive layer not covered by the heating layer between two adjacent heating layers is too large, more surface area of ​​the substrate 221 will be occupied, which is not conducive to improving the heating efficiency of the heating assembly 220 and improving the uniformity of the temperature distribution of the heating assembly 220.

[0076] In order to increase the ratio of the total area of ​​the heating layer to the surface area of ​​the substrate 221, or to reduce the area of ​​the region without the heating layer, the conductive layer includes a first conductive layer 224, and the number of conductive layers is reduced by simultaneously electrically connecting the first heating layer 222 and the second heating layer 223 through the first conductive layer 224. The first conductive layer 224 includes a first coupling area 2241, which is exposed outside the heating layer and is not covered by the heating layer, and is used to be electrically connected to an electrode of the power supply component 210.

[0077] Please refer to Figure 2-Figure 7 The first heating layer 222 includes a first covering area and a first side 2221 defining at least a portion of the boundary of the first covering area, and the second heating layer 223 includes a second covering area and a second side 2231 defining at least a portion of the boundary of the second covering area. The first covering area and the second covering area are arranged at intervals and cover different areas of the first conductive layer 224 respectively, so that the first heating layer 222 and the second heating layer 223 are both electrically connected to the first conductive layer 224.

[0078] The first coupling area 2241 is located between the first covering area and the second covering area, and is not covered by the first covering area and the second covering area. More specifically, the first coupling area 2241 is defined between the first side edge 2221 and the second side edge 2231, and can be defined at least partially by the first side edge 2221 and the second side edge 2231. The first side edge 2221 extends non-linearly so that a portion of the first side edge 2221 is recessed in a direction away from the second side edge 2231, thereby increasing the exposed area of ​​the first coupling area 2241.

[0079] Thus, there is a large gap between the section on the first side 2221 corresponding to the first coupling area 2241 and the second side 2231, and the first coupling area 2241 is thus widened so as to have a larger area for electrical connection with the electrode of the power supply component 210, which can prevent the electrode from contacting the heating layer when connecting to the first coupling area 2241, thereby increasing the contact resistance between the electrode and the heating component 220. The other sections on the first side 2221 that do not correspond to the first coupling area 2241 have a relatively small gap with the second side 2231, thereby reducing the area of ​​the area on the substrate 221 that is not covered by the heating layer. At the same time, the other areas on the first covering area that do not correspond to the first coupling area 2241 have a large overlap width and overlap area with the first conductive layer 224, thereby ensuring that the first conductive layer 224 is stably and reliably electrically connected to the first heating layer 222, and reducing the contact resistance of the electrical connection between the two.

[0080] The first side edge 2221 and the second side edge 2231 may be arranged opposite to each other and may be both arranged on the first conductive layer 224 .

[0081] As an example, see Figure 5 and Figure 7 , the first side 2221 includes a first section 1A and a second section 1B. At least a portion of the first section 1A may extend along a straight line. At least a portion of the first section 1A may extend along a wavy line. At least a portion of the first section 1A may extend obliquely relative to the longitudinal direction of the base 221 or may extend obliquely relative to the transverse direction of the base 221. However, the average spacing between the first section 1A and the second side 2231 is smaller than the average spacing between the second section 2A and the second side 2231, and the second section 2A may define a portion of the boundary of the first coupling area 2241.

[0082] When ensuring that the first conductive layer 224 has sufficient overlapping width and overlapping area with the first covering area, and ensuring that the first conductive layer 224 has sufficient overlapping width with the second covering area, in order to increase the ratio of the total area of ​​the heating layer to the surface area of ​​the substrate 221, the first section 1A can be infinitely close to the second covering area, but always keep a distance from the second covering area, so as to reduce the width of the first conductive layer 224, so that the first conductive layer 224 can still have a large overlapping width and overlapping area with the first covering area and the second covering area while having a small width. For example, the average spacing L2 between the first section 1A and the second side 2231 is less than or equal to 1mm, or the average spacing between the first section 1A and the second side 2231 is less than or equal to 0.1mm.

[0083] For further information, please refer to Figure 5 and Figure 7 The first side 2221 also includes a third section 3A, the second section 2A is located between the third section 3A and the first section 1A, and the average distance L3 between the third section 3A and the second side 2231 is smaller than the average distance between the second section 2A and the second side 2231.

[0084] Therefore, in the first section 1A, the second section 2A and the third section 3A, the average spacing between the second section 2A and the second side 2231 is the largest. The second section 2A can be a smooth arc, for example, it can be a partial edge of a circle or an ellipse. The second section 2A can be a broken line with one corner, so that the recessed portion of the first side 2221 is roughly triangular. The second section 2A can be a broken line with two corners, so that the recessed portion of the first coverage area is roughly rectangular. Of course, the second section 2A can also be a broken line with three or more corners. Among them, the "corner" can be a relatively sharp corner, or it can be an isolated corner.

[0085] The third section 3A may be on the same straight line as the first section 1A, or on a different straight line from the first section 1A. At least a portion of the third section 3A may extend along a straight line. At least a portion of the third section 3A may extend along a wavy line. At least a portion of the third section 3A may extend obliquely relative to the longitudinal direction of the substrate 221 or may extend obliquely relative to the transverse direction of the substrate 221. The average spacing L3 between the third section 3A and the second coverage area may be less than or equal to 1 mm, or may be less than or equal to 0.1 mm.

[0086] An average distance L3 between the third section 3A and the second side 2231 may be substantially equal to an average distance L2 between the first section 1A and the second side 2231 .

[0087] Disposing the second section 2A between the first section 1A and the third section 3A can increase the exposed area of ​​the first coupling region 2241 , which is beneficial for the electrical connection between the first coupling region 2241 and the electrode.

[0088] In one embodiment, reference may be made to Figure 5 and Figure 7 The second side 2231 extends non-linearly so that a portion of the second side 2231 is recessed in a direction away from the first side 2221 , thereby increasing the exposed area of ​​the first coupling region 2241 .

[0089] The second side 2231 may have substantially the same structural features as the first side 2221, or may be arranged in mirror symmetry with the first side 2221. For example, the second side 2231 includes a fourth section 1B and a fifth section 2B, the fourth section 1B is arranged relative to the first section 1A and the spacing between the fourth section 1B and the first section 1A can be substantially kept constant, the average spacing between the fourth section 1B and the first side 2221 is smaller than the average spacing between the fifth section 2B and the first side 2221, and the fifth section 2B defines a portion of the boundary of the first coupling area 2241. Further, reference may be made to Figure 5 and Figure 7 The second side 2231 also includes a sixth segment 3B, which is arranged relative to the third segment 3A and the distance between the sixth segment 3B and the third segment 3A can be basically kept constant, the fifth segment 2B is located between the sixth segment 3B and the fourth segment 1B, and the average distance between the sixth segment 3B and the first side 2221 is smaller than the average distance between the fifth segment 2B and the first side 2221, or the average distance between the sixth segment 3B and the first side 2221 can be basically equal to the average distance between the fourth segment 2B and the first side 2221.

[0090] It should be noted that it is optional but not mandatory for the second side 2231 to have substantially the same structural features as the first side 2221 . For example, in other embodiments, the second side 2231 may extend in a straight line.

[0091] In one embodiment, the diameter of the common tangent circle tangent to the first side 2221 and the second side 2231 is greater than or equal to 2 mm, and the diameter of the common tangent circle is less than or equal to the width L4 of the first conductive layer 224. Further, the concave portion of the first side 2221 and the concave portion of the second side 2231 are both tangent to a common tangent circle, the diameter of the common tangent circle is greater than or equal to 2 mm, and the diameter of the common tangent circle is less than or equal to the width L4 of the first conductive layer 224. Figure 2-Figure 7 In the illustrated embodiment, the diameter of the common tangent circle tangent to the second section 2A and the second side 2231 is greater than or equal to 2 mm, so that the first coupling region 2241 has a larger area for electrical connection with the electrode to prevent the electrode from contacting the heating layer.

[0092] In one embodiment, the concave portion of the first side 2221 and the concave portion of the second side 2231 are located on the same circumference, the diameter of the circle is greater than or equal to 2 mm, and the diameter of the circle is less than or equal to the width L4 of the first conductive layer 224. Figure 7 In the illustrated embodiment, the second section 2A and the fifth section 2B are located on the circumference of the same circle.

[0093] In one embodiment, the area of ​​the first coupling region 2241 is greater than or equal to 3 mm. 2 .

[0094] In one embodiment, the width of the first conductive layer 224 is less than or equal to 3 mm to reduce the coverage area of ​​the conductive layer on the substrate 221. In one embodiment, the maximum width of the first coverage area is greater than or equal to 1 mm, so that the overlapping width L1 between the first heating layer 222 and the first conductive layer 224 is greater than or equal to 1 mm. In one embodiment, the maximum width of the second coverage area is greater than or equal to 1 mm, so that the overlapping width between the second heating layer 223 and the first conductive layer 224 is greater than or equal to 1 mm.

[0095] In one embodiment, reference may be made to Figure 2 and Figure 3 The first heating layer 222 and the second heating layer 223 are arranged on the same surface of the substrate 221 , and the arrangement direction of the first heating layer 222 and the second heating layer 223 is the same as the extension direction of the first conductive layer 224 .

[0096] For example, the first heating layer 222 and the second heating layer 223 are arranged at intervals in the first direction, and the first conductive layer 224 extends along the first direction. Based on this, in one example, the first heating layer 222 forms a closed ring along a second direction different from the first direction; in one example, the second heating layer 223 forms a closed ring along a second direction different from the first direction; in one example, the first conductive layer 224 extends along the first direction to form a strip.

[0097] The first direction is a direction intersecting with the second direction, and the first direction may be perpendicular to the second direction.

[0098] In such Figure 2 and Figure 3In the illustrated embodiment, the first direction is a direction parallel to the longitudinal direction of the substrate 221, and the aerosol generating article 100 is substantially in the shape of a rod extending longitudinally. Thus, when the first heating layer 222 and the second heating layer 223 are arranged at intervals in the first direction, the first heating layer 222 and the second heating layer 223 are respectively arranged at different heights of the aerosol generating article 100, and in the two regions of the aerosol generating article 100 respectively heated by the first heating layer 222 and the second heating layer 223, one region is located downstream of the other region along the airflow direction.

[0099] In one embodiment, reference may be made to Figure 4-Figure 7 The first heating layer 222 and the second heating layer 223 are arranged on the same surface of the substrate 221 , and the arrangement direction of the first heating layer 222 and the second heating layer 223 is different from the extension direction of the first conductive layer 224 .

[0100] For example: you can refer to Figure 4 and Figure 5 , the first conductive layer 224 extends along a first direction, and the first heating layer 222 and the second heating layer 223 are arranged at intervals in a second direction different from the first direction. Based on this, in one example, the first heating layer 222 and the second heating layer 223 are both arc-shaped and arranged opposite to each other. In one example, the first conductive layer 224 is roughly strip-shaped. Figure 4 and Figure 5 In the illustrated embodiment, the first direction is a direction parallel to the longitudinal direction of the substrate, so that when the first heating layer 222 and the second heating layer 223 are arranged at intervals in the second direction, the first heating layer 222 and the second heating layer 223 can be respectively arranged at different positions at the same height of the aerosol generating article 1.

[0101] For example: you can refer to Figure 6 and Figure 7 , the first conductive layer 224 extends along the second direction, and the first heating layer 222 and the second heating layer 223 are arranged alternately in the first direction. Based on this, in one example, the first heating layer 222 forms a closed ring along the second direction; in one example, the second heating layer 223 forms a closed ring along the second direction; in one example, the first conductive layer 224 extends along the second direction to form a closed ring. Figure 6 and Figure 7 In the illustrated embodiment, the first direction is a direction parallel to the longitudinal direction of the substrate 221, and the aerosol generating article 100 is substantially in the shape of a rod extending longitudinally. Thus, when the first heating layer 222 and the second heating layer 223 are arranged at intervals in the first direction, the first heating layer 222 and the second heating layer 223 are respectively arranged at different heights of the aerosol generating article 100.

[0102] In one embodiment, reference may be made to Figure 2-Figure 5 , the conductive layer also includes a second conductive layer 225, the second conductive layer 225 has a second coupling area 2251 for electrically connecting to another electrode of the power supply component 210, the second conductive layer 225 is electrically connected to the first heating layer 222 and the second heating layer 223, and the second coupling area 2251 is not exposed by the first heating layer 222 and the second heating layer 223. In this embodiment, one of the first conductive layer 224 and the second conductive layer 225 is used to electrically connect to the positive electrode of the power supply, and the other is used to electrically connect to the negative electrode of the power supply, so that the first heating layer 222 and the second heating layer 223 can synchronously obtain power from the power supply component, and then can synchronously enter the working state and synchronously leave the working state. And in this embodiment, the first heating layer 222 and the second heating layer 223 are connected in parallel between the first conductive layer 224 and the second conductive layer 225, so that the first heating layer 222 and the second heating layer 223 can have the same working voltage, and the electric power of the first heating layer 222 and the second heating layer 223 depends on their respective areas or on their respective extension lengths along the current direction.

[0103] Based on this embodiment, the arrangement direction of the first heating layer 22 and the second heating layer 223 may be the same as the extension direction of the first conductive layer 224 (eg, Figure 2 and Figure 3 Alternatively, the arrangement direction of the first heating layer 22 and the second heating layer 223 may be different from the extension direction of the first conductive layer 224 (eg, Figure 4 and Figure 5 described above).

[0104] In this embodiment, the connection between the first heating layer 222 and the second heating layer 223 and the second conductive layer 225 can be the same as the connection between the first heating layer 222 and the second heating layer 223 and the first conductive layer 224. Figure 3 and Figure 5, the first heating layer 222 further includes a third covering area and a third side 2222 defining at least part of the boundary of the third covering area, the second heating layer 223 further includes a fourth covering area and a fourth side 2232 defining at least part of the boundary of the fourth covering area, the third covering area and the fourth covering area are arranged at intervals and cover different areas of the second conductive layer 225 respectively, so that the first heating layer 222 and the second heating layer 223 are both electrically connected to the second conductive layer 225. Among them, the second coupling area 2251 is defined between the third side 2222 and the fourth side 2232, and can be defined at least part of the boundary by the third side 2222 and the fourth side 2232. Furthermore, the third side 2222 extends non-linearly so that a portion of the third side 2222 is recessed in a direction away from the fourth side 2232 to increase the exposed area of ​​the second coupling region 2251. In one example, the third side 2222 has substantially the same structural features as the first side 2221, for example, the third side 2222 has features similar to the first section 1A, the second section 1A, and the third section 3A. In one example, the third side 2222 is mirror-symmetrically arranged with respect to the first side 2221. And / or, the non-linear extension of the fourth side 2232 makes a part of the fourth side 2232 concave in a direction away from the third side 2222, so as to increase the exposed area of ​​the second coupling area 2251; in one example, the fourth side 2232 has substantially the same structural features as the second side 2231, for example, the fourth side 2232 has features similar to the fourth section 1B, the fifth section 1B and the sixth section 3B; in one example, the fourth side 2232 is arranged in mirror symmetry with the second side 2231. In one example, the third side 2222 and the fourth side 2232 have substantially the same structural features, for example, the third side 2222 and the fourth side 2232 are arranged in mirror symmetry.

[0105] In one embodiment, reference may be made to Figure 6 and Figure 7 The conductive layer further includes a second conductive layer 225 having a second coupling area 2251 and a third conductive layer 226 having a third coupling area 2261, the second conductive layer 225 is electrically connected to the first heating layer 222, and the second coupling area 2251 is not covered by the first heating layer 222, the third conductive layer 226 is electrically connected to the second conductive layer 223, and the third coupling area 2261 is not covered by the second conductive layer 223. The second coupling area 2251 and the third coupling area 2261 are both used to be electrically connected to the positive pole of the power supply, or are both used to be electrically connected to the negative pole of the power supply.

[0106] In this embodiment, the first conductive layer 224 constitutes a common conductive layer of the first heating layer 222 and the second heating layer 223. That is, when the first coupling area 2241 on the first conductive layer 224 is electrically connected to the positive electrode of the power source, the second coupling area 2251 of the second conductive layer 225 and the third coupling area 2261 of the third conductive layer 226 are electrically connected to the negative electrode of the power source through different electrodes; when the first coupling area 2241 on the first conductive layer 224 is electrically connected to the negative electrode of the power source, the second coupling area 2251 of the second conductive layer 225 and the third coupling area 2261 of the third conductive layer 226 are electrically connected to the positive electrode of the power source through different electrodes.

[0107] As an example, an electrode electrically connected to the second coupling area 2251 of the second conductive layer 225 and an electrode electrically connected to the third coupling area 2261 of the third conductive layer 226 are electrically connected to a power supply through different lines, respectively, so that the first heating layer 222 and the second heating layer 223 can be independently controlled, and the first heating layer 222 and the second heating layer 223 can therefore have different operating voltages, operating currents or operating times.

[0108] Alternatively, as an example, the electrode electrically connected to the second coupling area 2251 of the second conductive layer 225 and the electrode electrically connected to the third coupling area 2261 of the third conductive layer 226 are electrically connected to each other and then electrically connected to the power supply through the same line, so that the first heating layer 222 and the second heating layer 223 can synchronously obtain power from the power supply component 210, and can then synchronously enter and exit the working state.

[0109] In this embodiment, the arrangement direction of the first heating layer 222 and the second heating layer 223 may be the same as the extension direction of the first conductive layer 224, or may be the same as the extension direction of the first conductive layer 224. When the first conductive layer 224 can form a closed ring, the second conductive layer 225 may also be configured to form a closed ring, and / or the third conductive layer 226 may also be configured to form a closed ring.

[0110] In such Figure 6 and Figure 7In the illustrated embodiment, the first heating layer 222 further includes a third covering area and a third side 2222 defining at least a portion of the boundary of the third covering area, the third covering area covers a portion of the second conductive layer 225, so that the first heating layer 222 is electrically connected to the second conductive layer 225, the third side 2222 defines a portion of the boundary of the second coupling area 2251, and the third side 2222 extends non-linearly so that a portion of the third covering area is recessed in the direction of the first side 2221, so as to increase the exposed area of ​​the second coupling area 2251. The third side 2222 may have substantially the same structural features as the first side 2221, for example, the third side 2222 has features similar to the first section 1A, the second section 1A, and the third section 3A. The third side 2222 may be arranged in a mirror-symmetric manner with the first side 2221.

[0111] In such Figure 6 and Figure 7 In the illustrated embodiment, the second heating layer 223 further includes a fourth covering area and a fourth side 2232 defining at least a portion of the boundary of the fourth covering area, the fourth covering area covers a portion of the third conductive layer 226, so that the second heating layer 223 is electrically connected to the third conductive layer 226, the fourth side 2232 defines a portion of the boundary of the third coupling area 2261, and the fourth side 2232 extends non-linearly so that a portion of the fourth covering area is recessed in the direction of the second side 2231, so as to increase the exposed area of ​​the third coupling area 2261. The fourth side 2232 may have substantially the same structural features as the second side 2231, for example, the fourth side 2232 has features similar to the fourth section 1B, the fifth section 1B, and the sixth section 3B. The fourth side 2232 may be arranged in a mirror-symmetrical manner with the second side 2231.

[0112] 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. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. A heating assembly for heating an aerosol generating product, characterized in that: include: matrix; A first conductive layer, supported by the substrate, wherein the first conductive layer has a first coupling region; a first heating layer, supported by the substrate, comprising a first cover area and a first side edge defining at least a portion of the first cover area; a second heating layer, supported by the substrate, comprising a second cover area and a second side edge defining at least a portion of the second cover area; The first covering area and the second covering area are arranged at intervals and respectively cover different areas of the first conductive layer, so that the first heating layer and the second heating layer are both electrically connected to the first conductive layer; The first coupling area is not covered by the first covering area and the second covering area and is defined between the first side and the second side, and at least one of the first side and the second side is partially recessed in a direction away from the other, thereby increasing the exposed area of ​​the first coupling area.

2. The heating assembly according to claim 1, characterized in that The first side includes a first section and a second section, and an average distance between the first section and the second side is smaller than an average distance between the second section and the second side; Wherein, an average distance between the first section and the second side is less than or equal to 1 mm.

3. The heating assembly according to claim 2, characterized in that The first side further includes a third section, the second section is located between the third section and the first section, and an average distance between the first section and the second side is substantially equal to an average distance between the third section and the second side.

4. The heating assembly according to claim 1, characterized in that The concave portion of the first side and the concave portion of the second side are both tangent to a common tangent circle, the diameter of the common tangent circle is greater than or equal to 2 mm, and the diameter of the common tangent circle is less than or equal to the width of the first conductive layer; or The recessed portion of the first side and the recessed portion of the second side are located on the same circumference, the diameter of the circle is greater than or equal to 2 mm, and the diameter of the circle is less than or equal to the width of the first conductive layer.

5. The heating assembly according to claim 1, characterized in that The width of the first conductive layer is less than or equal to 3 mm; The maximum width of the first coverage area is greater than or equal to 1 mm; and / or The maximum width of the second covering area is greater than or equal to 1 mm.

6. The heating assembly according to claim 1, characterized in that The first heating layer and the second heating layer are arranged on the same surface of the substrate, and the first heating layer and the second heating layer are arranged at intervals in a first direction; The first conductive layer extends along the first direction or along a second direction different from the first direction.

7. The heating assembly according to claim 1, characterized in that The first heating layer and the second heating layer are arranged on the same surface of the substrate, and the first conductive layer extends along a first direction; Wherein, the first heating layer and the second heating layer are arranged at intervals in a second direction different from the first direction.

8. The heating assembly according to claim 7, characterized in that The first heating layer and the second heating layer are both arc-shaped and arranged opposite to each other.

9. The heating assembly according to any one of claims 6 to 8, characterized in that: The heating assembly further comprises a second conductive layer, the second conductive layer having a second coupling area not covered by the first heating layer and the second heating layer; Wherein, the second conductive layer electrically connects the first heating layer and the second heating layer.

10. The heating assembly according to claim 9, characterized in that The first heating layer further comprises a third covering area and a third side edge defining at least a portion of the boundary of the third covering area; The second heating layer further comprises a fourth covering area and a fourth side edge defining at least a portion of the boundary of the fourth covering area; The third covering area and the fourth covering area are arranged at intervals and respectively cover different areas of the second conductive layer, so that the first heating layer and the second heating layer are both electrically connected to the second conductive layer; Wherein, the second coupling area is defined between the third side and the fourth side.

11. The heating assembly according to claim 10, characterized in that A portion of at least one of the third side and the fourth side is recessed in a direction away from the other side, thereby increasing an exposed area of ​​the second coupling region.

12. The heating assembly according to claim 6, characterized in that The heating assembly further includes a second conductive layer having a second coupling region and a third conductive layer having a third coupling region, the second conductive layer being electrically connected to the first heating layer, and the third conductive layer being electrically connected to the second conductive layer.

13. The heating assembly according to claim 6 or 12, characterized in that: The first heating layer forms a closed ring along a second direction different from the first direction; and / or The second heating layer forms a closed ring along a second direction different from the first direction; and / or The first conductive layer forms a closed loop along a second direction different from the first direction.

14. The heating assembly according to claim 1, characterized in that The base body is configured in a tubular shape and has an accommodating cavity therein for accommodating at least part of the aerosol generating article.

15. An aerosol generating device, characterized in that: It comprises a power supply component and the heating component according to any one of claims 1 to 14, wherein the power supply component comprises a power supply and a plurality of electrodes, the power supply is electrically connected to the heating component through the plurality of electrodes to supply power to the heating component, and one of the electrodes is electrically connected to the first coupling area.

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