Atomization Core Assembly and Manufacturing Method Therefor, and Aerosol Generation Device

This application claims priority to Chinese Patent Application No. 202210476739.4, entitled “ATOMIZATION CORE ASSEMBLY AND MANUFACTURING METHOD THEREFOR, AND AEROSOL GENERATION DEVICE” filed with the China National Intellectual Property Administration on Apr. 30, 2022, which is incorporated herein by reference in its entirety.

Embodiments of this application relate to the field of aerosol generation devices, and in particular, to an atomization core assembly and a manufacturing method therefor, and an aerosol generation device.

An aerosol generation device includes an atomizer, a core assembly of the atomizer is an atomization core assembly, and the atomization core assembly atomizes a liquid substrate to generate an aerosol.

A ceramic atomization core made of a ceramic material in the known art is widely used in an aerosol generation device. The ceramic atomization core mainly includes two types. A first type is a substantially block-shaped ceramic liquid guide body, a heating circuit is printed on an outer surface of the ceramic liquid guide body and silver paste is printed on two sides of the heating circuit to form conductive electrodes, or a heating steel mesh is embedded on the ceramic liquid guide body and conductive leads are connected to two ends of the heating steel mesh. A second type is a substantially circular-tubular ceramic liquid guide body, a heating mesh or a heating wire is fixed on an inner wall of the ceramic liquid guide body, and conductive leads are connected to two sides of a heating element. A first-type ceramic atomization core is suitable for being transversely fixed inside a flat atomizer due to a large overall thickness of the first-type ceramic atomization core, and a second-type ceramic atomization core is mainly suitable for being fixed inside a cylindrical atomizer. However, a cylindrical ceramic atomization core generally requires a cotton wrapping process, resulting in high difficulty in an assembly process thereof. However, the first-type block-shaped ceramic atomization core is difficult to be used in the cylindrical atomizer or the aerosol generation device due to a size and a fixing problem of the lead.

To resolve a problem that a non-circular tubular ceramic atomization core in the known art is difficult to be applied to a cylindrical or cylinder-like atomizer, an embodiment of this application provides an atomization core assembly, including:

In some embodiments, the conductive leads include a first conductive lead and a second conductive lead, and the first conductive lead and the second conductive lead are led out from a side surface on the same side of the porous liquid guide body.

In some embodiments, a first lead groove and a second lead groove are provided on the porous liquid guide body, the first conductive lead is accommodated in the first lead groove, and the second conductive lead is accommodated in the second lead groove.

In some embodiments, the heating element further includes a first electrical connection portion and a second electrical connection portion connected to two ends of the heating trajectory, where the first electrical connection portion is configured to be in contact with at least a part of a surface of the first conductive lead and is configured to fix the first conductive lead, and the second electrical connection portion is configured to be in contact with at least a part of a surface of the second conductive lead and is configured to fix the second conductive lead.

In some embodiments, at least a part of the first electrical connection portion is filled into the first lead groove from the atomization surface and combined around the first conductive lead, and at least a part of the second electrical connection portion is filled into the second lead groove from the atomization surface and combined around the second conductive lead.

In some embodiments, a first groove and a second groove are further provided on the porous liquid guide body, the first groove is in communication with the first lead groove, and the second groove is in communication with the second lead groove.

In some embodiments, a part of the first electrical connection portion is accommodated in the first groove and is configured to fix the first conductive lead; and a part of the second electrical connection portion is accommodated in the second groove and is configured to fix the second conductive lead.

In some embodiments, a recess depth of the first groove from the atomization surface is less than a recess depth of the first lead groove, and a recess depth of the second groove from the atomization surface is less than a recess depth of the second lead groove.

In some embodiments, the first lead groove and the second lead groove are arranged in parallel.

In some embodiments, the first groove and the first lead groove are combined to form a T-shaped groove; or the second groove and the second lead groove are combined to form a T-shaped groove.

In some embodiments, the porous liquid guide body includes a main body portion and a boss portion arranged in a thickness direction, a step is formed between the main body portion and the boss portion, and the atomization surface is arranged on the boss portion.

In some embodiments, both the first lead groove and the second lead groove are provided on the boss portion.

An embodiment of this application further provides a manufacturing method for the foregoing atomization core assembly. The manufacturing method includes: preparing a porous liquid guide body, and forming a recessed first lead groove and a recessed second lead groove on an atomization surface of the porous liquid guide body; placing a first conductive lead into the first lead groove, and placing a second conductive lead into the second lead groove; and combining conductive paste with the atomization surface of the porous liquid guide body to form a resistive heating trajectory, filling a part of the conductive paste into the first lead groove and the second lead groove, embedding a part of the first conductive lead and a part of the second conductive lead into the porous liquid guide body through curing, and another part of the first conductive lead and another part of the second conductive lead extend away from the porous liquid guide body in a direction substantially parallel to the atomization surface.

In some embodiments, a first groove and a second groove are provided on the porous liquid guide body, where the first groove is in communication with the first lead groove, and the second groove is in communication with the second lead groove. A part of the conductive paste is filled into the first groove and the second groove.

In some embodiments, a width of a groove opening of the first lead groove and a width of a groove opening of the second lead groove located on the atomization surface is greater than a width of a groove bottom; or a width of a groove opening of the first groove and a width of a groove opening of the second groove located on the atomization surface is greater than a width of a groove bottom.

An embodiment of this application further provides an aerosol generation device, including a housing and a liquid storage cavity located in the housing, where the liquid storage cavity is configured to store a liquid substrate, the foregoing atomization core assembly is arranged in the housing, and the atomization core assembly is configured to atomize the liquid substrate to generate an aerosol; and the atomization core assembly includes an atomization surface, and an extending direction of the atomization surface is arranged in parallel with a longitudinal direction of the housing.

Beneficial effects of this application are as follows: Because the heating element is configured in such a way that the resistive heating trajectory extends on the atomization surface, atomization efficiency of the heating element is higher than that of an embedded heating steel mesh. Further, a part of the conductive leads connected to two ends of the heating element of the atomization core assembly is embedded into the porous liquid guide body, and another part extends from a side surface of the porous liquid guide body and is fixed in a direction substantially parallel to an atomization surface of the porous liquid guide body, which is beneficial to the atomization core assembly as a whole being fixed inside the atomizer in a direction parallel to the atomization surface of the atomization core assembly, so that the atomization core assembly as a whole is more suitable for being fixed in a cylindrical or cylinder-like atomizer. In addition, a manner of combining the heating trajectory and the conductive leads is beneficial to the application in the cylindrical or cylinder-like atomizer.

For ease of understanding of this application, this application is described below in more detail with reference to the accompanying drawings and specific implementations.

It should be noted that all the directional indications (for example, up, down, left, right, front, rear, horizontal, and vertical) in the embodiments of this application are merely used to explain a relative position relationship, a motion status, or the like between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication correspondingly changes, the “connection” may be direct connection or indirect connection, and the “arranged”, “arranged at”, and “set at” may be directly or indirectly arranged.

In addition, descriptions involving “first” and “second” in this application are merely used for a purpose of description, and shall not be understood as an indication or implication of relative importance or implicit indication of a quantity of indicated technical features. Therefore, features defined by “first” and “second” may explicitly or implicitly include at least one of the features.

This application provides an aerosol generation device. The aerosol generation device includes an atomizer and a power supply assembly. The power supply assembly provides electric drive for the atomizer, and the atomizer atomizes a liquid substrate stored inside the atomizer to generate an aerosol. According to different liquid substrates stored in the aerosol generation device, the aerosol generation device may be classified into an electronic cigarette and a medical device. The liquid substrate stored inside the electronic cigarette includes a nicotine preparation, glycerol, propylene glycol, essence fragrances, flavor components, or the like. An aerosol generated by a user inhaling the electronic cigarette mainly meets requirements for nicotine or the flavor components. As the medical device, the liquid substrate stored inside the medical device includes an active functional component, glycerol, propylene glycol, or the like. An aerosol generated by a user inhaling such a device is mainly used for treating respiratory diseases or inhaling a certain pharmaceutical active ingredient through a lung. Related implementations provided in this application may be applied to the foregoing two types of devices, which are not limited herein.

An atomizerand a power supply assemblymay be accommodated inside a housing, to form a portable disposable aerosol generation device with a small volume. The atomizerand the power supply assemblymay alternatively be configured as two independent assemblies, and the two assemblies are connected in a separable connection manner, to form a combined aerosol generation device. In an example, a part of an inner cavity of the housing of the power supply assembly defines an accommodating cavity, the atomizer can be inserted from an end of the housing of the power supply assembly into the accommodating cavity, and at least a part of a surface of the atomizer can be maintained inside the accommodating cavity. The two assemblies may be magnetically attracted or snap connected, so that a stable connection is formed between the two assemblies. In another example, referring to, a threaded sleeve is arranged at an end portion of the atomizer, and a threaded groove is provided at an end portion of the power supply assembly, so that the two assemblies are in a threaded connection. An electrical connection assembly is arranged at a connection end portion of the atomizerand a connection end portion of the power supply assembly, so that after the two assemblies are connected, circuits between the two assemblies remain connected. An internal structure of the power supply assemblymay be arranged in a common form in the known art, for example, a control module, a charging module, and the like are arranged inside the power supply assembly. Details are not described in this implementation of this application.

The following mainly uses a structure of a cylindrical atomizeras an example to describe an internal structure of the atomizer. Referring to, the atomizerincludes a housing, the housingincludes a first end and a second end opposite to each other in a longitudinal direction, a mouthpieceis provided at the first end, and a connection baseis arranged at the second end. The mouthpieceincludes a mouthpiece openingextending longitudinally through the mouthpiece, and an aerosol enters a mouth of a user through the mouthpiece opening. The mouthpieceis generally made of a plastic material with a high safety level, for example, PPSU, so that the mouthpiecefor the user can be improved by being arranged as a flat mouthpiece roughly in a duckbill shape. An end portion of the housingis open, and the mouthpieceis sealingly sleeved on an opening end of the housing. In an optional example, the mouthpiecemay be a general cylindrical mouthpiece, a plug hole is provided at one end of the housing, and the cylindrical mouthpiece is inserted into the plug hole of the housing. A second end of the housingis provided as an opening end. Other components inside the atomizerare mounted inside the housingthrough the opening end. A connection baseis arranged at the opening of the second end of the housing. The connection baseis configured to provide longitudinal support for other components inside the atomizer, and a part of the connection baseis configured as a threaded electrode. The threaded electrode is screwed into a threaded groove of the power supply assembly, so that the atomizeris in communication with the power supply assembly.

A part of space inside the housingis provided as a liquid storage cavity, and the liquid storage cavityis configured to store a liquid substrate. An atomization assembly is arranged inside the housing, the atomization assembly includes an atomization core assembly, and the liquid substrate inside the liquid storage cavitycan flow to the atomization core assemblyand be atomized by the atomization core assemblyto generate an aerosol. The atomization assembly further includes a holderconfigured to hold the atomization core assembly. In a cylindrical or cylinder-like atomizer, the holderaccommodated inside the cylindrical or cylinder-like atomizeris generally configured to be in a circular tube shape or a circular-tube-like shape.

In the embodiments of this application, a ceramic atomization core assemblywith a novel structure and substantially in a flat plate-shape is provided, and can be fixed in an inner cavity of a substantially tubular or tube-like holder. Specifically, the atomization core assemblyincludes a porous liquid guide bodyand a heating element, and the heating elementis combined on the porous liquid guide body. Referring toto, the porous liquid guide bodyis roughly a flat plate-shaped structure, and has a liquid absorbing surfaceand an atomization surfacethat are arranged opposite to each other, and four side surfacesconnected between the liquid absorbing surfaceand the atomization surface. To facilitate fixing of the porous liquid guide bodyinside the holder, a thickness of the porous liquid guide bodyis small.

Further, referring to, the porous liquid guide bodyincludes a length direction, a width direction w, and a thickness direction h that are perpendicular to each other, and a length of the side surfaceof the porous liquid guide bodyextending in the thickness direction is less than a length of the liquid absorbing surfaceor the atomization surfaceextending in the width direction.

The heating elementis combined on the atomization surface, the atomization surfaceand the liquid absorbing surfaceare arranged opposite to each other, and the liquid substrate inside the liquid storage cavityis configured to flow to the liquid absorbing surfaceand be transferred to the heating clementon the atomization surface through the liquid absorbing surface. It may be understood that because the thickness of the porous liquid guide bodyis small, a path for the liquid substrate to be transferred to the atomization surfacethrough the liquid absorbing surfaceof the porous liquid guide bodyis short, and even a liquid substrate with high viscosity can be transferred to the heating elementin a short time. Therefore, the heating element is suitable for use in the atomizerwith a liquid substrate with high viscosity of a medical device type.

Further, because the thickness of the flat plate-shaped porous liquid guide bodyis small, an overall volume of the porous liquid guide bodyis small, and the porous liquid guide bodyis suitable for being fixed in the inner cavity of the holderin a longitudinal direction of the holder. In an example, the porous liquid guide bodyincludes a main body portionand a boss portion, a stepis formed between the main body portionand the boss portion, and the porous liquid guide bodyis fixed in the inner cavity of the holderby using the step. The atomization surfaceis arranged on the boss portion, and the liquid absorbing surface is arranged on the main body portion. A surface area of the atomization surfaceis less than a surface area of the liquid absorbing surface. A part of a side surfaceof the boss portionand a side surfaceof the main body portionare arranged on a plane, another part of the side surfaceof the boss portionis arranged as four arc-shaped curved surfaces, and the four arc-shaped curved surfaces are respectively located at four corners of the porous liquid guide body. It may be understood that, the atomization surfacemay alternatively be arranged on the main body portion, and the liquid absorbing surface may alternatively be arranged on the boss portion. In another example, alternatively, a protruding structure may be directly arranged on the side surfaceof the porous liquid guide bodyfor fixing. In another example, a concave structure may be arranged on the liquid absorbing surfaceof the porous liquid guide bodyas required, to store a part of the liquid substrate.

The heating elementis printed on the atomization surfaceof the porous liquid guide bodyby using a heating trajectory. Compared with a design structure of embedding a heating wire in a cylindrical ceramic atomization core, atomization efficiency of the heating trajectory printed through a rear film on a flat plate-shaped porous liquid guide body is significantly improved. Specifically, a heating power of the heating trajectory printed through the rear film is usually 6.5 W, and a TPM (a quantity of smoke inhaled per puff) of the atomizeris 6 mg/puff. However, in a manner of embedding the heating wire on the ceramic atomization core, a heating power of the heating element is usually 9 W to 10 W, and the TPM (a quantity of smoke inhaled per puff) of the atomizeris 3.5 mg/puff. In addition, the cylindrical ceramic atomization core needs to be wrapped with cotton, resulting in a poor ventilation effect of the atomization core assembly.

Further, the heating trajectory may be designed in a plurality of forms, and the heating trajectory is evenly distributed on the atomization surface, which is beneficial to balancing atomization efficiency on all parts of the atomization surface, and avoids dry burning caused by an excessively high atomization rate caused by dense local heating trajectories and inappropriate supply of the liquid substrate.

Referring toto, the heating trajectory is formed by connecting several same or similar base units. In an example, the heating trajectory is formed by connecting two arched units, and the two arched units are symmetrically arranged about a central axis of the atomization surface, as shown in. In another example, the heating trajectory includes three base units connected, namely, a first base unit, a second base unit, and a third base unit, where the second base unit is connected to the first base unit and the third base unit head to tail respectively, the first base unit and the third base unit are symmetrically arranged on two sides of the second base unit, and a central axis of the second base unit coincides with the central axis of the atomization surface. A shape of the third base unit may be different from shapes of the first base unit and the second base unit, as shown inand.

The heating elementfurther includes a first electrical connection portionand a second electrical connection portionconnected to two ends of the heating trajectory. The first electrical connection portionand the second electrical connection portionare configured in a rectangular shape, and the heating trajectory is connected to a middle position of the first electrical connection portionor the second electrical connection portion, or the heating trajectory is connected to a side edge of the first electrical connection portionor the second electrical connection portion. The first electrical connection portionand the second electrical connection portionare symmetrically arranged with respect to the central axis of the atomization surface.

In a cylindrical atomizer, the heating elementof the atomization core assemblyis connected to the threaded electrode on the connection basethrough a conductive lead. In the embodiments provided in this application, the foregoing porous liquid guide bodyprinted with the heating trajectory is connected to the threaded electrode through the conductive lead. Specifically, referring to,, and, the conductive leadis connected to an end portion of the heating element, and a part of the conductive leadis embedded into an interior of the porous liquid guide body, so that the conductive leadand the heating elementare connected and fixed, and a remaining part of the conductive leadremains extending longitudinally parallel to the atomization surfaceof the porous liquid guide bodyafter being led out from the side surface of the porous liquid guide body, which is beneficial to overall fixed and mounting of the atomization core assembly.

Specifically, the conductive leadsinclude a first conductive leadand a second conductive lead, and the first conductive leadand the second conductive leadare respectively connected to the first electrical connection portionand the second electrical connection portion. In the cylindrical atomizer, the atomization core assemblyis fixed in the inner cavity of the holderin a length direction of the atomization core assembly, and both the first conductive leadand the second conductive leadextend in the length direction of the porous liquid guide body.

In an example, the first conductive leadis soldered to the first electrical connection portion, and the second conductive leadis soldered to the second electrical connection portion. To facilitate an electrical connection between the conductive leadand the heating element, the first electrical connection portionand the second electrical connection portionhave a large enough area, so that the first conductive leadand the second conductive leadhave a large enough soldering surface. It may be understood that, when the area of the first electrical connection portionand the second electrical connection portionis large, the atomization surfaceshould have a large surface area, resulting in a large volume of an entire porous liquid guide body, which is not conducive to mounting in an existing cylindrical atomizerwith a small overall volume. In addition, the first electrical connection portionand the second electrical connection portionare mainly for conductivity. When the area of the first electrical connection portionand the second electrical connection portionincreases, the first electrical connection portionand the second electrical connection portiongenerate a lot of heat waste, which is not beneficial to improving atomization efficiency of the atomizer.

To optimize an overall structure of the atomization core assembly, in a preferred implementation provided in this application, referring toto, two lead grooves, respectively a first lead grooveand a second lead groove, are provided on the porous liquid guide body. The first conductive leadis fixed in the first lead groove, and the second conductive leadis fixed in the second lead groove. The lead groove is provided on the atomization surfaceand runs through the porous liquid guide bodyto the side surfaceof the porous liquid guide bodyin the length direction of the porous liquid guide body. When the atomization surfaceis arranged on the boss portionof the porous liquid guide body, the lead groove is also provided on the boss portion. The first lead grooveand the second lead groovemay be provided in parallel, and the first lead grooveand the second lead grooveare symmetrically provided about the central axis of the atomization surface. The first lead grooveand the second lead groovemay alternatively be provided in non-parallel. For example, the first lead grooveextends to one of the side surfaces, and the second lead grooveextends to another side surface. The depths and widths of the first lead grooveand the second lead grooveare configured to accommodate the conductive leads.

To facilitate fixing of the conductive leadsin the lead grooves, the first electrical connection portionis configured to cover at least a part of the opening end of the first lead groove, and the second electrical connection portionis configured to cover at least a part of the opening end of the second lead groove. The first electrical connection portionis configured to abut against an outer surface of the first conductive leadin a depth direction of the first lead groove, and the second electrical connection portionis configured to abut against an outer surface of the second conductive leadin a depth direction of the second lead groove. In addition, because the first electrical connection portioncovers at least a part of the outer surface of the first conductive lead, the first electrical connection portionmaintains stable electrical contact with the first conductive lead. Because the second electrical connection portioncovers at least a part of the outer surface of the second conductive lead, the second electrical connection portionmaintains stable electrical contact with the second conductive lead. When the first electrical connection portioncovers the first conductive leadwith a sufficient length, the first conductive leadcan be stably accommodated inside the first lead groove, and the first electrical connection portionand the first conductive leadhave a large electrical contact area, so that the first conductive leadcan establish a stable electrical connection state with the first electrical connection portion. Similarly, when the second electrical connection portioncovers the second conductive leadwith a sufficient length, the second conductive leadcan be stably accommodated inside the second lead groove, and the second electrical connection portionand the second conductive leadhave a large electrical contact area, so that the second conductive leadcan establish a stable electrical connection state with the second electrical connection portion.

Further, a first grooveand a second grooveare further provided on the porous liquid guide body, where the first grooveis in communication with the first lead groove, and the second grooveis in communication with the second lead groove. The first electrical connection portionincludes a first portion and a third portion. The first portion of the first electrical connection portioncovers at least a part of the opening end of the first lead groove, and a second portion of the first electrical connection portionis accommodated in the first groove, so that the third portion of the first electrical connection portioncan abut against the outer surface of the first conductive leadin the width direction of the first lead groove, and the first conductive leadis simultaneously subjected to abutting actions in the depth direction and the width direction of the first lead groovewhen fixed in the first lead groove. Therefore, the first electrical connection portioncannot be displaced in the first lead groove. Similarly, the second electrical connection portionincludes a second portion and a fourth portion. The second portion of the second electrical connection portioncovers at least a part of the opening end of the first lead groove, and the fourth portion of the second electrical connection portionis accommodated in the second groove, so that the second portion of the second electrical connection portioncan abut against the outer surface of the second conductive leadin the width direction of the second lead groove, and the second conductive leadis simultaneously subjected to abutting actions in the depth direction and the width direction of the second lead groovewhen fixed in the second lead groove. Therefore, the second electrical connection portioncannot be displaced in the second lead groove.

It may be understood that, when the first electrical connection portionincludes the first portion and the third portion, a length of the first portion of the first electrical connection portionmay be appropriately reduced. The first groovemay be separately arranged on one side of the first lead groove, and the first grooveand the first lead grooveare combined to form a T-shaped groove, or a central axis of the first grooveand a central axis of the first lead grooveare arranged at a specific angle. In another example, the first groovemay alternatively be arranged on two sides of the first lead groove, and the first grooveand the first lead grooveare combined to form a cross-shaped groove, or the central axis of the first grooveand the central axis of the first lead grooveare intersected in an X shape. A depth of the first grooveis less than a depth of the first lead groove, and the first grooveis provided close to an end portion of the first lead groove, which is beneficial to reducing an overall surface area of the first electrical connection portion, thereby reducing heat loss generated by the first electrical connection portion. Similarly, when the second electrical connection portionincludes the second portion and the fourth portion, a length of the second portion of the second electrical connection portioncan be appropriately reduced. The second groovemay be separately arranged on one side of the second lead groove, and the second grooveand the first lead grooveare combined to form a T-shaped groove, or a central axis of the second grooveand a central axis of the second lead grooveare arranged at a specific angle. In another example, the second groovemay alternatively be arranged on two sides of the second lead groove, and the second grooveand the second lead grooveare combined to form a cross-shaped groove, or the central axis of the second grooveand the central axis of the second lead grooveare intersected in an X shape. A depth of the second grooveis less than a depth of the second lead groove, and the second grooveis provided close to an end portion of the second lead groove, which is beneficial to reducing an overall surface area of the second electrical connection portion, thereby reducing heat loss generated by the second electrical connection portion. A size of an opening end of the first grooveor the second grooveis greater than a size of a groove bottom of the first grooveor the second groove, which is beneficial to filling the second portion of the first electrical connection portionor the fourth portion of the second electrical connection portion. A size of an opening end of the first lead grooveor the second lead grooveis greater than a size of a groove bottom of the first lead grooveor the second lead groove, which is conducive to a fixing operation of the conductive lead in the lead groove.

In an example, a depth of the first grooveor the second grooveis 0.3 mm, and a chamfer is provided at an opening end of the first grooveor the second groovelocated on the atomization surface, to facilitate molding and manufacturing of the porous liquid guide body, and facilitate filling of the second portion of the first electrical connection portionor the second portion of the second electrical connection portioninside the first grooveor the second groove. A depth of the first lead grooveor the second lead grooveis 0.5 mm, a groove bottom of the first lead grooveor the second lead grooveis set as a semicircular arc with a radius of 0.3 mm, and a size of an opening end of the first lead grooveor the second lead grooveranges from 0.3 mm to 1.5 mm. An outer diameter of the conductive lead arranged in the first lead grooveor the second lead grooveis a nickel wire with an outer diameter of 0.3 mm. It may be understood that, when the outer diameter of the conductive lead changes, the size and the depth of the opening end of the first lead grooveor the second lead groove, and a radius of the semicircular arc at the groove bottom are all adjusted accordingly, so that a part of the conductive lead can be completely accommodated in the lead groove. Depths of the first grooveand the second grooveare configured as the second portion of the first electrical connection portionor the second portion of the second electrical connection portion, which can form contact abutment against the conductive lead in the width direction of the lead groove. A length of the atomization surfaceof the porous liquid guide bodyis 5 mm, a width is 4 mm, a width of the heating trajectory is 0.3 mm, and a thickness is 0.1 mm. A width by which the heating trajectory extends on the atomization surfacemay be optimized and designed based on atomization efficiency.

Another embodiment of this application further provides a manufacturing method for the foregoing atomization core assembly, which includes the following steps:

Step 1: Manufacture a ceramic substrate: Ceramic powder, a sintering agent, an organic auxiliary agent, and a pore former are mixed to obtain a ceramic paste, injection molding is performed on the ceramic paste to obtain a ceramic green body, and the ceramic green body is defatted and sintered to obtain a porous ceramic substrate. The ceramic powder includes at least one of aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, cordierite, or mullite. The sintering agent includes at least one of calcium carbonate, magnesium oxide, lanthanum oxide, barium oxide, zinc oxide, or lithium oxide. The porous former includes at least one of mineral wax, white wax, beeswax, or ozokerite. To promote mixing uniformity of the ceramic paste, an organic auxiliary agent is added. The organic auxiliary agent includes at least one of an aliphatic acid-based dispersing agent or an acrylic resin-based dispersing agent. Based on a weight percentage of the ceramic paste, a mass percentage of the ceramic powder accounts for 30% to 50%, a weight percentage of the sintering agent accounts for 15% to 30%, and a weight percentage of the porous former accounts for 20% to 40%. During the molding, an injection pressure of an injection molding machine ranges from 0.5 MPa to 5 MPa, and an injection temperature ranges from 50° C. to 100° C.

Step 2: Place the conductive lead: The first conductive lead is placed in the first lead groove, and the second conductive leadis placed in the second lead groove.

Step 3: Printing the heating trajectory: The resistive paste is printed through the rear film to obtain a heating trajectory in a specific shape, the resistive paste of the first electrical connection portionis printed on corresponding regions of the atomization surfacerespectively, and a part of the conductive paste is filled into the first lead grooveand the second lead groove, a part of the first conductive lead and the second conductive lead are embedded in the porous liquid guide body through curing, and another part of the first conductive lead and the second conductive lead respectively extend away from the porous liquid guide body in a direction substantially parallel to the atomization surface.

Further, to facilitate the injection of the conductive paste, the first groove and the second groove are arranged on the porous liquid guide body, where the first groove is in communication with the first lead groove, the second groove is in communication with the second lead groove, and a part of the conductive paste is filled in the first groove and the second groove respectively, so that the first electrical connection portionis in fixed contact with the first conductive lead. The second electrical connection portionis in fixed contact with the second conductive lead.

Further, to facilitate placing the first conductive lead, the second conductive lead, and guiding the conductive paste to flow into the first lead groove and the second lead groove, a width of a groove opening of the first lead groove and a width of a groove opening of the second lead groove located on the atomization surface is greater than a width of the groove bottom. When the porous liquid guide body is further provided with the first groove and the second groove, a width of a groove opening of the first groove and a width of a groove opening of the second groove located on the atomization surface is greater than a width of the groove bottom.