Atomization components and electronic atomization devices

Abstract

The present invention relates to an atomization component and an electronic atomization device, wherein the atomization component includes a base body, including an atomization surface for atomizing an aerosol-generating matrix to form an aerosol. And a heating element for connecting to a power source to heat the atomization surface, wherein the heating element is directly or indirectly arranged on the atomization surface. The heating element includes at least one first heating portion and at least one second heating portion that generate different amounts of heat per unit length and per unit time. Since the heating element includes at least one first heating portion and at least one second heating portion that generate different amounts of heat per unit length and per unit time, it is possible to avoid local heat stacking areas on the atomization surface, thereby ensuring that the thermal field distribution of the entire atomization component is uniform.

Description

Technical Field

[0001] The present invention relates to the field of atomization technology, and in particular to an atomization component and an electronic atomization device comprising the atomization component. Background Art

[0002] Electronic atomization devices have a similar appearance and taste to ordinary cigarettes, but usually do not contain other harmful ingredients in cigarettes such as tar and suspended particulate matter. Therefore, electronic atomization devices are widely used as a substitute for cigarettes.

[0003] The atomizer assembly, as the core component of the electronic atomizer device, usually includes a base and a heating element. The heating element is arranged on the atomizing surface of the base. When the heating element is energized to generate heat, the aerosol-generating matrix on the atomizing surface can absorb the heat and atomize to form an aerosol for the user to inhale. However, with traditional heating elements, the heat field generated by the heating element is unevenly distributed, resulting in local high-temperature areas and local low-temperature areas on the atomizing surface. Ultimately, the aerosol-generating matrix in the local high-temperature area produces a burnt smell and various harmful substances due to the high temperature, while the liquid in the local low-temperature area cannot be effectively atomized due to the high temperature. Summary of the Invention

[0004] A technical problem solved by the present invention is how to improve the uniformity of the thermal field distribution of the atomization component.

[0005] An atomizing assembly, comprising:

[0006] a substrate comprising an atomizing surface for atomizing the aerosol-forming substrate to form an aerosol; and

[0007] a heating element, used to be connected to a power source to heat the atomizing surface, the heating element being directly or indirectly disposed on the atomizing surface;

[0008] The heating element includes at least one first heating portion and at least one second heating portion that generate different amounts of heat per unit length and per unit time.

[0009] In one embodiment, the first heating portion and the second heating portion are connected in series and / or in parallel.

[0010] In one embodiment, the first heating portion generates more heat per unit length and per unit time than the second heating portion, and the projections of the adjacent first heating portion and second heating portion on the heating element in the normal direction of their respective extension paths at least partially overlap.

[0011] In one embodiment, the resistivity of the second heating part is less than that of the first heating part; the resistivity of the second heating part ranges from 0.1Ω·mm to 10mΩ·mm, and the resistivity of the first heating part ranges from 30Ω·mm to 100mΩ·mm.

[0012] In one embodiment, the second heating portion is made of at least one of gold, silver or copper materials; and / or the first heating portion is made of at least one of ruthenium or nickel materials.

[0013] In one embodiment, the heating element is a membrane-like structure or a linear structure; when it is a membrane-like structure, the thickness of the heating element ranges from 80 μm to 150 μm.

[0014] In one embodiment, the square resistance of the second heating portion is smaller than the square resistance of the first heating portion.

[0015] In one embodiment, the heating element is divided into a plurality of first heating segments and second heating segments, wherein the first heating segments extend along a first direction and are spaced apart in a second direction perpendicular to the first direction;

[0016] The length of the first heating segment increases gradually from the center to the edge of the heating element along the second direction, and the second heating segment is connected between two aligned ends of the two first heating segments.

[0017] In one embodiment, the distance between any two adjacent first heating segments is an equal first distance; and / or the distance between any two adjacent second heating segments is an equal second distance.

[0018] In one embodiment, the first soldering pad and the second soldering pad are connected to both ends of the heating element, and the first soldering pad and the second soldering pad are parallel to each other.

[0019] In one embodiment, the heating element is directly attached to the atomizing surface; or, a groove is provided on the atomizing surface, and the heating element is partially or completely accommodated in the groove.

[0020] In one embodiment, the substrate is a porous ceramic substrate made of porous ceramic material.

[0021] An electronic atomization device comprises the atomization assembly described in any one of the above.

[0022] A technical effect of one embodiment of the present invention is that, because the heating element includes at least one first heating portion and at least one second heating portion that generate different amounts of heat per unit length and per unit time, the formation of localized heat accumulation areas on the atomizing surface can be avoided, thereby ensuring uniform thermal field distribution throughout the entire mist assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of an electronic atomization device provided in one embodiment;

[0024] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the atomization component in the electronic atomization device shown;

[0025] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure of the atomization assembly from another perspective;

[0026] Figure 4 Schematic diagram of the distribution structure of each first heating segment when the heating element is similar to a rectangular spiral line;

[0027] Figure 5 This is a schematic diagram of a first exemplary structure when the heating element is similar to a rectangular spiral;

[0028] Figure 6 Schematic diagram of a second exemplary structure when the heating element is similar to a rectangular spiral;

[0029] Figure 7 Schematic diagram of a third exemplary structure in which the heating element is similar to a rectangular spiral;

[0030] Figure 8 This is a schematic diagram of the structure when the heating element is similar to an Archimedean spiral;

[0031] Figure 9 This is a schematic diagram of the planar structure when the heating element is entirely made of the first heating part. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] See Figure 1 、 Figure 2 and Figure 3 An electronic atomization device 10 provided in one embodiment of the present invention includes an atomizer 11 and a power supply 12. A liquid storage chamber is defined in the atomizer 11 and includes an atomization assembly 20. The atomization assembly 20 includes a heating element 30 and a base 40. The base 40 can be made of a porous ceramic material, so that the base 40 has a large number of micropores and has a buffering and transmission function for the liquid. The porosity of the base 40 can be 20% to 80%, and the specific value of the porosity can be 20%, 30%, or 80%. The pore size of the micropores can be 1μm to 80μm, and the specific value of the pore size can be 1μm, 5μm, or 8μm. The liquid storage chamber can store liquid aerosol-generating substrates such as oil. The base 40 has an atomizing surface 41 and a liquid absorbing surface 42. The liquid absorbing surface 42 is used to absorb the oil in the liquid storage chamber and introduce the oil into the base 40. The oil introduced into the base 40 further reaches the atomizing surface 41.

[0035] The heating element 30 is arranged on the atomizing surface 41. For example, the heating element 30 can be directly attached to the atomizing surface 41 by silk-screen printing, that is, the heating element 30 protrudes a certain height from the atomizing surface 41. Of course, the atomizing surface 41 can be recessed to form a groove, and the heating element 30 is fully or partially accommodated in the groove, and the heating component has a top surface arranged away from the liquid absorption surface 42. When the heating element 30 is fully accommodated in the groove, the top surface can be located in the groove and spaced apart from the atomizing surface 41, that is, the top surface is lower than the atomizing surface 41; the top surface can also be flush with the atomizing surface 41. Obviously, when the heating component is partially accommodated in the groove, the top surface is located outside the groove and spaced apart from the atomizing surface 41. At this time, the top surface is higher than the atomizing surface 41. By setting the heating element 30 in the groove, the connection strength between the heating component and the base 40 can be improved to a certain extent, preventing the heating element 30 from warping and separating from the base 40 under the cyclic action of thermal stress, and then preventing the warped part of the heating element 30 from dry burning or even melting due to the inability to be soaked in sufficient oil.

[0036] The power supply 12 is electrically connected to the heating element 30. When the power supply 12 supplies power to the heating element 30, the heating element 30 can convert electrical energy into heat, thereby causing the oil on the atomizing surface 41 to absorb heat and rise to the atomization temperature, ensuring that the oil is eventually atomized to form an aerosol that can be inhaled by the user. A sink 43 can be provided on the liquid absorption surface 42. The sink 43 is formed by a portion of the liquid absorption surface 42 being recessed toward the atomizing surface 41 to a set depth. By providing the sink 43, the path for the oil to reach the atomizing surface 41 can be shortened, reducing the resistance along the way generated by the oil flowing from the liquid storage chamber to the atomizing surface 41. The total contact area between the base 40 and the oil is also increased, thereby increasing the supply speed of the oil to the atomizing surface 41 and preventing the atomizing surface 41 from drying out due to the oil consumption rate being greater than the supply rate. Especially for oils with relatively high viscosity, providing the sink 43 can significantly reduce the resistance along the way during the oil flow process, thereby ensuring that the atomizing surface 41 has a reasonable oil supply speed.

[0037] In some embodiments, the atomizer 11 and the power supply 12 are detachably connected. For example, the atomizer 11 is detachably secured to the power supply 12 via a magnetic connection, a threaded connection, or a snap-on connection. Thus, the atomizer 11 can be a disposable consumable, and the power supply 12 can be recycled multiple times. Once the oil in the atomizer 11 is completely consumed, the depleted atomizer 11 can be removed from the power supply 12 and discarded, and a new atomizer 11 filled with oil can be reinstalled on the power supply 12. Of course, in other embodiments, the atomizer 11 and the power supply 12 can also be non-detachably connected.

[0038] In some embodiments, the heating element 30 may be a diaphragm-like structure or a linear structure. When the heating element 30 is a diaphragm-like structure, the thickness of the heating element 30 may range from 80 μm to 150 μm, and the specific value of the thickness may be 80 μm, 100 μm, or 150 μm, etc. By making the heating element 30 have a reasonable thickness, the fatigue strength of the heating element 30 may be appropriately improved, and fatigue fracture of the heating component under the cyclic action of thermal stress may be avoided, thereby increasing the life of the heating element 30. When the atomizing surface 41 is a two-dimensional plane, the heating element 30 may be a planar structure. When the atomizing surface 41 is a three-dimensional curved surface, the heating element 30 may be a three-dimensional structure.

[0039] See Figure 3 、 Figure 5 and Figure 6, the atomizing assembly 20 also includes a first solder pad 32 and a second solder pad 33. The heating element 30 is used to generate heat. The first solder pad 32 and the second solder pad 33 are respectively connected to the two ends of the heating element 30. The first solder pad 32 and the second solder pad 33 are used to be electrically connected to the positive and negative poles of the power supply 12, respectively. When the power supply 12 supplies power to the heating element 30 through the first solder pad 32 and the second solder pad 33, the heating element 30 generates heat. The extension path of the heating element 30 can be abstracted as a plane curve structure. In other words, the heating element 30 can be abstracted as a curve. The curve can be a spiral line, and the spiral line can be similar to a rectangular spiral line (such as Figure 5 ), or it can be similar to an equidistant Archimedean spiral (such as Figure 8 ), a variable pitch involute helix or an S-shaped helix, etc. When the heating element 30 is similar to a rectangular helix, its structure is described as follows:

[0040] See Figure 4 、 Figure 5 and Figure 6 , the heating element 30 is divided into a plurality of first heating segments 310 and a second heating segment 320, and the first heating segment 310 and the second heating segment 320 can both be abstracted as a line segment. The plurality of first heating segments 310 all extend along the first direction, so that the plurality of first heating segments 310 are parallel to each other, that is, the plurality of first heating segments 310 are spaced apart along the second direction perpendicular to the first direction. When the atomizing surface 41 is a rectangle, the first direction can be the length direction of the atomizing surface 41, and the second direction is the width direction of the atomizing surface 41. The spacing between two adjacent first heating segments 310 is recorded as the first spacing, and the first spacing between any two adjacent first heating segments 310 can be equal. Along the second direction from the center to the edge of the heating element 30, that is, along the direction from the first heating segment 310 located at the center to the first heating segment 310 located at the edge, the length of each first heating segment 310 gradually decreases.

[0041] Specifically, the most central first heating segment 310 is recorded as the central heating segment 303. There is a group of first heating segments 310 on the upper side of the central heating segment 303, and this group of first heating segments is recorded as the first group 301. There is also a group of first heating segments 310 on the lower side of the central heating segment 303, and this group of first heating segments is recorded as the second group 302. For the first group 301 and the second group 302, the number of first heating segments 310 contained in both can be equal. For the first group 301, along the arrangement direction from bottom to top, each first heating segment 310 is recorded as the upper heating segment No. 1 301a, the upper heating segment No. 2 301b, the upper heating segment No. 301c, the upper heating segment No. 4, and finally the upper heating segment No. N. The upper heating segment No. 1 301a is closest to the central heating segment 303, and the upper heating segment No. 2 301b is adjacent to the upper heating segment No. 1 301a. By analogy, the upper heating segment No. N-1 is adjacent to the upper heating segment No. N, the length of the upper heating segment No. N-1 is less than the length of the upper heating segment No. N, and the end of the upper heating segment No. N-1 is not aligned with the end of the upper heating segment No. N. Similarly, referring to the design pattern of the first group 301, for the second group 302, along the arrangement direction from top to bottom, each first heating segment 310 is respectively recorded as the next heating segment No. 302a, the next heating segment No. 2 302b, the next heating segment No. 302c, the next heating segment No. 4 until the next heating segment No. N, the next heating segment No. 302a is closest to the central heating segment 303, and the next heating segment No. 2 302b is adjacent to the next heating segment No. 302a. By analogy, the lower heating segment No. N-1 is adjacent to the lower heating segment No. N. The length of the lower heating segment No. N-1 is less than the length of the lower heating segment No. N, and the end of the lower heating segment No. N-1 is not aligned with the end of the lower heating segment No. N.

[0042] When the first heating segments 310 are arranged, first, the right end of the upper heating segment 301a is aligned with the right end of the center heating segment 303, and the left end of the lower heating segment 302a is aligned with the left end of the center heating segment 303; and the length of the upper heating segment 301a is equal to the length of the lower heating segment 302a. Secondly, the lengths of the upper second heating segment 301b and the lower second heating segment 302b are equal, and the right end of the upper second heating segment 301b is aligned with the right end of the lower heating segment 302a. The left end of the upper heating segment 301a is aligned with the left end of the lower second heating segment 302b. Thirdly, the lengths of the upper third heating segment 301c and the lower third heating segment 302c are equal, and the right end of the upper third heating segment 301c is aligned with the right end of the lower second heating segment 302b, and the left end of the upper second heating segment 301b is aligned with the left end of the lower third heating segment 302c. Similarly, the lengths of the upper N heating segments and the lower N heating segments are equal, the right end of the upper M+1 heating segment is aligned with the right end of the lower M heating segment, and the left end of the upper M heating segment is aligned with the left end of the lower M+1 heating segment.

[0043] The number of the second heating segments 320 is multiple, and the second heating segments 320 are connected between the two aligned ends of the two first heating segments 310. The second heating segments 320 can also be linear, so that the second heating segments 320 all extend along the second direction, and the second heating segments 320 are spaced apart along the first direction (the length direction of the atomizing surface 41). The spacing between two adjacent second heating segments 320 is recorded as the second spacing, and the second spacing between any two adjacent second heating segments 320 can be equal. The second spacing can be greater than or equal to the above-mentioned first spacing. For example, the second spacing can be just equal to the above-mentioned first spacing. The range of values of the first spacing and the second spacing can be 0.3mm to 0.7mm, and the specific values of the two can be 0.3mm, 0.4mm, 0.5mm or 0.7mm, etc. The widths of the first heating segment 310 and the second heating segment 320 can also be equal, and the range of values of the widths of the two can be 0.1mm to 0.3mm, and the specific values of the widths can be 0.1mm, 0.15mm, 0.2mm or 0.3mm, etc.

[0044] In some embodiments, for example, see Figure 5 , the number of the first heating segments 310 is three, and the number of the second heating segments 320 is two. Figure 6 , the number of the first heating segments 310 is five, and the number of the second heating segments 320 is four. Figure 7 , the number of the first heating segments 310 is seven, and the number of the second heating segments 320 is six. For another example, by analogy, the number of the first heating segments 310 is 2N+1, and the number of the second heating segments 320 is 2N.

[0045] The first soldering pad 32 is connected to one end of the heating element 30, and the second soldering pad 33 is connected to the other end of the heating element 30, that is, the first soldering pad 32 and the second soldering pad 33 are connected to opposite ends of the heating element 30. Both the first soldering pad 32 and the second soldering pad 33 can be linear, so that both are arranged parallel to the second heating section 320. The widths of the first soldering pad 32 and the second soldering pad 33 are equal, and the widths of both can be greater than the width of the second heating section 320. The widths of the first soldering pad 32 and the second soldering pad 33 can range from 0.6 mm to 0.9 mm, and the specific values of the widths can be 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm, etc. The spacing between the first soldering pad 32 and the second heating section 320 adjacent to it can be equal to the second spacing, and the spacing between the second soldering pad 33 and the second heating section 320 adjacent to it can also be equal to the second spacing. The first and second pads 32, 33 both have low resistivity and excellent electrical conductivity. The first and second pads 32, 33 are used to electrically connect to the power source 12, so that the power source 12 supplies power to the heating element 30 through the first and second pads 32, 33. This ensures that the heating element 30 converts electrical energy into thermal energy to atomize the oil on the atomizing surface 41.

[0046] See Figure 5 and Figure 6The heating element 30 includes a plurality of first heating parts 300 and second heating parts 400. The square resistance of the second heating part 400 is smaller than that of the first heating part 300. The heat generated by the first heating part 300 per unit length and per unit time is greater than the heat generated by the second heating part 400. The first heating part 300 and the second heating part 400 can form a series circuit, a parallel circuit, or a mixed circuit of both series and parallel connections. For example, when the first heating part 300 and the second heating part 400 form a series circuit, the resistivity of the second heating part 400 is smaller than that of the first heating part 300. In this way, the heat generated by the first heating part 300 per unit length and per unit time is greater than the heat generated by the second heating part 400. The resistivity of the second heating part 400 ranges from 0.1Ω·mm to 10mΩ·mm. For example, its specific value can be 0.1Ω·mm, 1Ω·mm, 2Ω·mm or 10Ω·mm, etc. The second heating part 400 can be made of at least one of gold, silver or copper. The resistivity of the first heating part 300 ranges from 30Ω·mm to 100mΩ·mm. For example, its specific value can be 30Ω·mm, 50Ω·mm, 80Ω·mm or 100Ω·mm, etc. The first heating part 300 can be made of at least one of ruthenium or nickel materials. Of course, the first heating part 300 can also contain other alkali metal materials. The second heating part 400 is connected between two adjacent first heating parts 300, that is, one end of the second heating part 400 is connected to the end of one of the first heating parts 300, and the other end of the second heating part 400 is connected to the end of the other first heating part 300. In short, along the extension path of the entire heating body 30, the second heating part 400 and the first heating part 300 are staggered. For the orthographic projection of the second heating part 400 along the normal direction of the extension path, the orthographic projection covers at least part of the first heating part 300 adjacent to the second heating part 400 in the normal direction. In other words, for two first heating parts 300 and second heating parts 400 adjacent to each other in the normal direction of the extension path, the orthographic projections of the two first heating parts 300 and second heating parts 400 in the normal direction at least partially overlap. In other embodiments, for two first heating parts 300 and second heating parts 400 adjacent to each other on the extension path, the orthographic projections of the two first heating parts 300 and second heating parts 400 in the normal direction may also at least partially overlap. Of course, the heating element 30 may also include a third heating part, and the heat generated by the third heating part per unit length and per unit time may be between the first heating part and the second heating part.

[0047] The first heating section 310 may include a plurality of second heating parts 400 and a first heating part 300, that is, the first heating section 310 may be formed by connecting a plurality of second heating parts 400 and a first heating part 300 at the same time. The second heating section 320 may include at least one second heating part 400 or at least one first heating part 300. When the length of the second heating section 320 is relatively short, the second heating section 320 may be formed by only one second heating part 400 or only one first heating part 300. When the length of the second heating section 320 is relatively long, the second heating section 320 may also be formed by connecting a plurality of second heating parts 400 and a first heating part 300.

[0048] For the entire heating element 30, the first heating portion 300 has the highest resistivity, and the second heating portion 400 can have a resistivity less than or equal to the resistivity of the first pad 32 and the second pad 33. Therefore, for the entire heating element 30, the first heating portion 300, the second heating portion 400, the first pad 32, and the second pad 33 are interconnected to form a series circuit, so that almost all of the heat of the heating element 30 is generated by the first heating portion 300, while the heat generated by the second heating portion 400, the first pad 32, and the second pad 33 can be ignored.

[0049] See Figure 9 If the entire heating element 30 is made entirely of a first heating portion 300 with a relatively high resistivity, since the heat generated by the first heating segment 310 is conducted along the four sides on the atomizing surface 41, the farther the atomizing surface 41 is from the first heating segment 310, the less heat it receives. Therefore, there must be a stacked area in the atomizing surface 41 between two adjacent first heating segments 310 that can simultaneously receive more heat from the two first heating segments 310, so that the stacked area absorbs more heat per unit time and forms a first local high-temperature area 410. The temperature of the first local high-temperature area 410 will be significantly higher than the temperature of other areas of the atomizing surface 41, causing the heating temperature of the oil in this area to be much higher than the atomization temperature of the oil, thereby causing the oil to produce a burnt smell due to the excessive heating temperature, ultimately affecting the user experience. The portion of the heating element 30 near the first local high-temperature area 410 cannot be fully soaked by the oil because the oil consumption rate is greater than the supply rate, resulting in dry burning, which in turn causes the heating element 30 to dry burn or even melt. Similarly, a local high-temperature area will also be formed on the atomizing surface 41 between two adjacent second heating segments 320 .

[0050] In particular, for the atomizing surface 41 located at the center of the heating element 30, since the length of the second heating segment 320 connected between the two adjacent first heating segments 310 is relatively short, the area of the atomizing surface 41 close to both the first heating segments 310 and the second heating segment 320 will simultaneously receive heat from both the first heating segments 310 and the second heating segment 320, thereby forming a stacked area. This stacked area absorbs more heat over time, thereby forming a second local high-temperature area 420. The temperature of the first local high-temperature area 410 will be even higher than that of the first local high-temperature area 410, similarly causing the oil in the first local high-temperature area 410 to produce a burnt smell due to the excessive heating temperature. At the same time, the portion of the heating element 30 close to the second local high-temperature area 420 will dry out or even melt. Furthermore, the second local high-temperature region 420 is significantly close to the connection between the first heating segment 310 and the second heating segment 320. Under the action of high thermal stress, stress concentration will form at the connection between the first heating segment 310 and the second heating segment 320, causing it to separate from the base 40. This makes it more difficult for the heating element 30 separated from the base 40 to be wetted by the oil, resulting in dry burning or melting. Of course, for other areas of the atomized surface 41, the connection between any two first heating segments 310 and second heating segments 320 will also form a local high-temperature region.

[0051] As for the heating element 30 in the above embodiment, the orthographic projection of the second heating portion 400 along the normal direction of the extension path covers at least a portion of the first heating portion 300 adjacent to the second heating portion 400 in the normal direction. Therefore, for two adjacent first heating segments 310, the first heating part 300 on one of the first heating segments 310 will be arranged opposite to the second heating part 400 of the other first heating segment 310. Since the heat generated by the second heating part 400 can be ignored, the heat on the atomizing surface 41 between the first heating part 300 and the second heating part 400 almost all comes from the first heating part 300 on one of the first heating segments 310, avoiding the formation of a stacking area by the atomizing surface 41 receiving heat from the first heating part 300 on the first heating segment 310 and the second heating segment 320 at the same time. Similarly, the atomizing surface 41 between the two adjacent second heating segments 320 will not be able to form a heat stacking area, ensuring that the thermal field distribution of the entire heating body 30 is uniform, so that the heat and temperature are evenly distributed everywhere on the entire atomizing surface 41, avoiding the formation of local high temperature on the atomizing surface 41, preventing the oil from producing a burnt smell due to excessive temperature, and also making the oil at various locations on the atomizing surface 41 atomized to form an aerosol with uniform particles, thereby improving the user experience. At the same time, the heating element 30 is prevented from burning dry or even melting due to local high temperature, and the generation of toxic gases by dry burning that may affect human health is prevented, thereby improving the safety and service life of the heating element 30.

[0052] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An atomizing assembly, characterized in that: include: a substrate comprising an atomizing surface for atomizing the aerosol-generating substrate to form an aerosol; and a heating element, used to be connected to a power source to heat the atomizing surface, the heating element being directly or indirectly disposed on the atomizing surface; The heating element comprises at least one first heating portion and at least one second heating portion arranged in series; Along the extension path of the heating element, the second heating parts and the first heating parts are arranged alternately, the first heating parts generate more heat per unit length and per unit time than the second heating parts, and any two adjacent first heating parts are connected to the second heating part; The projections of the first heat-generating portion and the second heat-generating portion, which are adjacent to each other in the normal direction of the extension path of the heat-generating body, in the normal direction of their respective extension paths at least partially overlap.

2. The atomizing assembly according to claim 1, characterized in that: The porosity of the matrix is 20% to 80%.

3. The atomizing assembly according to claim 2, characterized in that: The porosity of the matrix is 20%, 30% or 80%.

4. The atomizing assembly according to claim 1, characterized in that: The resistivity of the second heating part is less than that of the first heating part; the resistivity of the second heating part ranges from 0.1Ω·mm to 10mΩ·mm, and the resistivity of the first heating part ranges from 30Ω·mm to 100mΩ·mm.

5. The atomizing assembly according to claim 4, characterized in that: The second heating portion is made of at least one of gold, silver or copper materials; and / or the first heating portion is made of at least one of ruthenium or nickel materials.

6. The atomizing assembly according to claim 1, characterized in that: The heating element is a membrane-like structure or a linear structure; when it is a membrane-like structure, the thickness of the heating element ranges from 80 μm to 150 μm.

7. The atomizing assembly according to claim 6, characterized in that: The square resistance of the second heating portion is smaller than the square resistance of the first heating portion.

8. The atomizing assembly according to claim 1, characterized in that: The heating element is divided into a plurality of first heating segments and a second heating segment, wherein the first heating segments extend along a first direction and are spaced apart in a second direction perpendicular to the first direction; The length of the first heating segment increases gradually from the center to the edge of the heating element along the second direction, and the second heating segment is connected between two aligned ends of the two first heating segments.

9. The atomizing assembly according to claim 8, characterized in that: The distance between any two adjacent first heating segments is an equal first distance; and / or the distance between any two adjacent second heating segments is an equal second distance.

10. The atomizing assembly according to claim 1, characterized in that: It also includes a first soldering pad and a second soldering pad connected to both ends of the heating element, and the first soldering pad and the second soldering pad are parallel to each other.

11. The atomizing assembly according to claim 1, characterized in that: The heating element is directly attached to the atomizing surface; or, a groove is provided on the atomizing surface, and the heating element is partially or completely accommodated in the groove.

12. The atomizing assembly according to claim 1, characterized in that: The substrate is a porous ceramic substrate made of porous ceramic material.

13. An electronic atomization device, characterized in that: The invention comprises the atomizing assembly according to any one of claims 1 to 12.

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