Patent Description:
A typical electronic atomization device includes a heating body, a battery, and a control circuit, etc. The heating body is a core component of the electronic atomization device, and both an atomizing effect of the electronic and using experience provided by the atomization device are depended on characteristics of the heating body.

An existing heating body has a risk of being corroded in a strong corrosive aerosol-generating substance and thereby has a shorter service life. Different approaches to address this risk are described in <CIT>, <CIT>, <CIT> or <CIT>.

The present disclosure provides a heating body, an atomization assembly, and an electronic atomization device, to resolve the technical problem that the service life of a heating body is short in the related art.

To solve the above technical problem, a first technical solution provided in the present disclosure is to provide a heating body, applied to an electronic atomization device and configured to atomize an aerosol-generating substance, wherein the heating body includes a liquid-guiding substrate; a heating material layer, arranged on a first surface of the liquid-guiding substrate, wherein the heating material layer is a resistance heating material, and includes a heating portion wherein a portion of the liquid-guiding substrate (<NUM>), where the heating portion (<NUM>) is arranged, is defined as a heating region and a connection portion wherein another portion of the liquid-guiding substrate (<NUM>), where the connection portion (<NUM>) is arranged, is defined as an electrode region; a first protecting film, at least partially arranged on the surface of the heating portion away from the liquid-guiding substrate, wherein the material of the first protecting film is non-conductive and resistant to corrosion of the aerosol-generating substance; and a second protecting film, at least partially arranged on the surface of the connection portion away from the liquid-guiding substrate, wherein the material of the second protecting film is conductive and resistant to the corrosion of the aerosol-generating substance.

To solve the above technical problem, a second technical solution provided in the present disclosure is to provide an atomization assembly, including a liquid storage cavity and a heating body, configured to store a liquid aerosol-generating substance; the above heating body; and the heating body is in fluid communication with the liquid storage cavity.

To solve the above technical problem, a third technical solution provided in the present disclosure is to provide an electronic atomization device, including the above atomization assembly and a power supply assembly electrically connected to the heating body.

The present disclosure may have the following beneficial effects. Different from the related art, the present disclosure discloses a heating body, an atomization assembly, and an electronic atomization device. The heating body includes a liquid-guiding substrate, a heating material layer, a first protecting film, and a second protecting film. The liquid-guiding substrate includes a heating region and an electrode region. The heating material layer is arranged on a first surface of the liquid-guiding substrate and includes a heating portion arranged in the heating region and a connection portion arranged in the electrode region. The first protecting film is arranged on the surface of the heating portion away from the liquid-guiding substrate, and the material of the first protecting film is non-conductive and resistant to corrosion of an aerosol-generating substance. The second protecting film is arranged on the surface of the connection portion away from the liquid-guiding substrate, and the material of the second protecting film is a conductive and resistant to the corrosion of the aerosol-generating substance. The heating region and the electrode region of the heating material layer are protected with different protecting films, such that the heating material layer is prevented from being corroded by the aerosol-generating substance. In this way, a service life of the heating material layer is improved.

To describe the technical solutions in the embodiments of the present disclosure more clearly, the accompanying drawings required for describing the embodiments will be briefly illustrated. The accompanying drawings in the following description show merely some embodiments of the present disclosure, and a person of ordinary skill in the art may still derive other accompanying drawings from these accompanying drawings without creative efforts.

The technical solutions in the embodiments of the present disclosure are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. The described embodiments are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

In the following description, for the purpose of illustration rather than limitation, a specific detail such as a specific system structure, an interface, technology, or the like, are proposed to thoroughly understand the present disclosure.

The terms "first", "second", and "third" in the present disclosure are merely intended for a purpose of description, and shall not be understood to indicate or imply relative significance or implicitly indicate the number of indicated technical features. Therefore, features defining with the terms "first", "second", and "third" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, "a plurality of" means at least two, such as two, and three, etc., unless it is specifically defined otherwise. All directional indications (for example, upper, lower, left, right, front, and rear) in the embodiments of the present disclosure are only used for explaining relative position relationships, movement situations, or the like between various components under a specific posture (as shown in the accompanying drawings). When the specific posture changes, the directional indications change accordingly. In the embodiments of the present disclosure, the terms "include", "have", and any variant thereof are intended to cover a non-exclusive inclusion. For example, a process, a method, a system, a product, or a device including a series of steps or units is not limited to the listed steps or units, but alternatively includes a step or a unit which is not listed, or further alternatively includes another step or component intrinsic to the process, the method, the product, or the device.

The present disclosure is described in detail below with reference to the accompanying drawings and the embodiments.

As shown in <FIG> is a structural schematic view of an electronic atomization device according to some embodiments of the present disclosure.

In this embodiment, an electronic atomization device <NUM> is provided. The electronic atomization device <NUM> may be configured to atomize an aerosol-generating substance. The electronic atomization device <NUM> includes an atomization assembly <NUM> and a power supply assembly <NUM> electrically connected to the atomization assembly <NUM>.

The atomization assembly <NUM> is configured to store an aerosol-generating substance and atomize the aerosol-generating substance to form aerosol for a user to inhale. The atomization assembly <NUM> may be applied to different fields such as medical care, cosmetology, and recreation inhalation. In a specific embodiment, the atomization assembly <NUM> may be applied to an electronic aerosol atomization device to atomize the aerosol-generating substance and generate the aerosol for an inhaler to inhale, and all the following embodiments are described with taking the recreation inhalation as an example.

For a specific structure and functions of the atomization assembly <NUM>, reference may be made to the specific structure and the functions of the atomization assembly <NUM> described in the following embodiments, same or similar technical effects may be implemented, and details are not repeated herein.

The power supply assembly <NUM> includes a battery (not shown in the drawings) and a controller (not shown in the drawings). The battery is configured to supply electric energy for operation of the atomization assembly <NUM>, such that the atomization assembly <NUM> atomizes the aerosol-generating substance to form the aerosol. The controller is configured to control the operation of the atomization assembly <NUM>. The power supply assembly <NUM> further includes a component such as a battery holder, an airflow sensor, etc..

The atomization assembly <NUM> and the power supply assembly <NUM> may be integrally arranged or may be detachably connected to each other, which may be designed according to a specific requirement.

The power of the electronic atomization device generally does not exceed <NUM> W, and ranges from <NUM> W to <NUM> W. The voltage of the battery adopted by the electronic atomization device ranges from <NUM> V to <NUM> V. For a closed electronic atomization device (an electronic atomization device without a requirement for the user to autonomously inject an aerosol-generating substance), the voltage of a battery of the closed electronic atomization device ranges from <NUM> V to <NUM> V. The electronic atomization device of the present disclosure is not limited to these parameters.

As shown in <FIG> is a structural schematic view of an atomization assembly of the electronic atomization device according to some embodiments of the present disclosure.

The atomization assembly <NUM> includes a housing <NUM>, a heating body <NUM>, and an atomization base <NUM>. The atomization base <NUM> includes a mounting cavity (not marked in the drawings), and the heating body <NUM> is arranged in the mounting cavity. The heating body <NUM> is arranged in the housing <NUM> together with the atomization base <NUM>. The housing <NUM> is provided with a vapor outlet channel <NUM>. A liquid storage cavity <NUM> is defined by an inner surface of the housing <NUM>, an outer surface of the vapor outlet channel <NUM>, and the top surface of the atomization base <NUM> corporately. The liquid storage cavity <NUM> is configured to store a liquid aerosol-generating substance. The heating body <NUM> is electrically connected to the power supply assembly <NUM>, so as to atomize the aerosol-generating substance to generate the aerosol.

The atomization base <NUM> includes an upper base <NUM> and a lower base <NUM>, and the mounting cavity is defined by the upper base <NUM> and the lower base <NUM> corporately. An atomization cavity <NUM> is defined by an atomization surface of the heating body <NUM> and the cavity walls of the mounting cavity corporately. A liquid supplying channel <NUM> is provided on the upper base <NUM>, and the liquid supplying channel <NUM> is in fluid communication with the mounting cavity. The aerosol-generating substance in the liquid storage cavity <NUM> flows into the heating body <NUM> through the liquid supplying channel <NUM>, i.e., the heating body <NUM> is in fluid communication with the liquid storage cavity <NUM>. An air inlet channel <NUM> is provided on the lower base <NUM>. The external air enters the atomization cavity <NUM> through the air inlet channel <NUM>, and carries the aerosol atomized by the heating body <NUM> to flow to the vapor outlet channel <NUM>. The user inhales the aerosol through the end opening of the vapor outlet channel <NUM>.

As shown in <FIG> is a structural schematic view of a heating body according to a first embodiment of the present disclosure, <FIG> is a structural schematic top view of the heating body in <FIG> is a structural schematic view of a liquid-guiding substrate of the heating body in <FIG>.

The heating body <NUM> includes a liquid-guiding substrate <NUM>, a heating material layer <NUM>, a first protecting film <NUM>, and a second protecting film <NUM>. The liquid-guiding substrate <NUM> has a structure supporting function. The heating material layer <NUM> is a resistance heating material. The liquid-guiding substrate <NUM> includes a first surface <NUM> and a second surface <NUM> arranged opposite to the first surface <NUM>. The first surface <NUM> of the liquid-guiding substrate <NUM> includes a heating region a and an electrode region b. The heating material layer <NUM> is arranged on the first surface <NUM> of the liquid-guiding substrate <NUM>, and includes a heating portion <NUM> arranged in the heating region a and a connection portion <NUM> arranged in the electrode region b. The connection portion <NUM> serves as an electrode, and is configured to be electrically connected to the power supply assembly <NUM>. The first protecting film <NUM> is at least partially arranged on the surface of the heating portion <NUM> away from the liquid-guiding substrate <NUM>, and the material of the first protecting film <NUM> is a non-conductive and resistant to corrosion of the aerosol-generating substance. The second protecting film <NUM> is at least partially arranged on the surface of the connection portion <NUM> away from the liquid-guiding substrate <NUM>, and the material of the second protecting film <NUM> is a conductive and resistant to the corrosion of the aerosol-generating substance.

Based on the foregoing arrangement, different regions of the heating material layer <NUM> are protected by different protecting films, respectively, so that the corrosion of the aerosol-generating substance to the heating portion <NUM> and the connection portion <NUM> is effectively prevented, and accordingly a service life of the heating material layer <NUM> is improved.

In an embodiment, the first protecting film <NUM> covers the entire heating portion <NUM>, to prevent the corrosion of the aerosol-generating substance to the entire heating portion <NUM>, so that the entire heating portion <NUM> is protected, and thereby the service life of the heating body <NUM> is improved.

In an embodiment, the second protecting film <NUM> covers the entire connection portion <NUM>, to prevent the corrosion of the aerosol-generating substance to the entire connection portion <NUM>, so that the entire connection portion <NUM> is protected, and thereby the service life of the heating body <NUM> is improved.

In an embodiment, an opening (not shown in the drawings) is provided on the second protecting film <NUM> to expose a part of the connection portion <NUM>. The exposed connection portion <NUM> is configured to be in contact with a conducting member (not marked in the drawings). Based on the arrangement, the contact resistance between the conducting member and the connection portion <NUM> is reduced. It may be understood that, the connection portion <NUM> is electrically connected to the power supply assembly <NUM> through the conducting member (not marked in the drawings). The conducting member may be an ejector pin or a spring pin.

In an embodiment, the material of the first protecting film <NUM> is ceramic or glass. Since the material of the heating material layer <NUM> is metal, the thermal expansion coefficient of the ceramic or the glass matches the thermal expansion coefficient of the metal heating material layer <NUM>, and the adhesion force of the ceramic or the glass matches the adhesion force of the metal heating material layer <NUM>. Therefore, the ceramic or the glass is configured as the first protecting film <NUM>, and the first protecting film <NUM> may be difficult to fall off the heating portion <NUM>, so that the heating portion can be well protected.

When the material of the first protecting film <NUM> is the ceramic, the material of the ceramic may be one or more of aluminum nitride, silicon nitride, aluminum oxide, silicon oxide, silicon carbide, or zirconium oxide, which is selected as required. As shown in Table <NUM> and Table <NUM>, compared with a case where a stainless steel resistant to the corrosion of the aerosol-generating substance is served as a protecting film to protect the heating portion <NUM>, the ceramic is served as the first protecting film <NUM> to protect the heating portion <NUM>, and the first protecting film <NUM> has higher heat conduction performance and a smaller contacting angle to the aerosol-generating substance. The higher heat conduction performance of the first protecting film <NUM> may conduct the heat generated by the heating portion <NUM> to the aerosol-generating substance more efficiently, which improves the atomization efficiency of the heating portion <NUM>. The smaller contact angle of the first protecting film <NUM> brings stronger wettability of the aerosol-generating substance on the surface of the first protecting film and accordingly a higher transmission efficiency of the aerosol-generating substance, which further improves the atomization efficiency of the heating portion <NUM>. Experiments was performed for the heating body <NUM> with the first protecting film <NUM> (the first protecting film <NUM> adopts the aluminum nitride) as a protecting film of the heating portion <NUM> and a heating body in the related art (which adopts the stainless steel as the protecting film). The experiment conditions are as follows: the constant power of <NUM> W, and <NUM> of inhalation and then stopped for <NUM>. The atomization amount of the heating body <NUM> provided in the present disclosure is <NUM>/puff, and the atomization amount of the heating body in the related art is <NUM>/puff, which proves that the atomization amount may be apparently improved by adopting the ceramic as the first protecting film <NUM>. The thermal conductivities of some materials are shown in Table <NUM>; and contacting angles of these materials are shown in Table <NUM>.

In an embodiment, the thickness of the first protecting film <NUM> ranges from <NUM> to <NUM>. When the thickness is less than <NUM>, the first protecting film <NUM> may be difficult to achieve a protecting effect, and the aerosol-generating substance may penetrate the first protecting film <NUM> and corrode the heating portion <NUM> due to a poor density of the thin first protecting film. When the thickness of the first protecting film <NUM> is greater than <NUM>, the first protecting film <NUM> is easily cracked due to a thermal shock and loses the protecting effect due to excessively great stress.

In an embodiment, the thickness of the second protecting film <NUM> ranges from <NUM> to <NUM>. When the thickness is less than <NUM>, the second protecting film <NUM> may be difficult to achieve a protecting effect, since the aerosol-generating substance may penetrate the second protecting film <NUM> and corrode the connection portion <NUM> due to a poor density of the thin second protecting film. When the thickness of the second protecting film <NUM> is greater than <NUM>, the second protecting film <NUM> is easily cracked due to the thermal shock and loses the protecting function due to excessively great stress.

In an embodiment, the material of the second protecting film <NUM> is conductive ceramic or metal. Compared with the first protecting film <NUM> which is made of a non-conductive material, the second protecting film <NUM> is made of a conductive material, so that the second protecting film <NUM> does not affect the electrical connection between the connection portion <NUM> and the power supply assembly <NUM> while protecting the connection portion <NUM> from the corrosion of the aerosol-generating substance. Since the material of the heating material layer <NUM> is metal, the thermal expansion coefficient of the conductive ceramic or metal matches the thermal expansion coefficient of the metal heating material layer <NUM>, and the adhesion force of the conductive ceramic or metal matches the adhesion force of the metal heating material layer <NUM>, such that the second protecting film <NUM> may be difficult to fall off the connection portion <NUM> and thus achieve a better protecting effect when the conductive ceramic or metal is served as the second protecting film <NUM>. The conductive ceramic or metal is served as the second protecting film <NUM>, such that the contacting resistance is reduced.

When the material of the second protecting film <NUM> is the conductive ceramic, the material of the conductive ceramic includes one or more of titanium nitride or titanium diboride. It may be understood that, the conductive ceramic is more resistant to the corrosion of the aerosol-generating substance than the metal.

It should be noted that, the connection portion <NUM> of the heating material layer <NUM> and the second protecting film <NUM> form an electrode. The second protecting film <NUM> is arranged on the connection portion <NUM>, which reduces the resistance and may be served as the electrode. The thickness of the heating portion <NUM> and the thickness of the connection portion <NUM> may be the same or may be different. To reduce a resistance value of the connection portion <NUM>, the thickness of the connection portion <NUM> may also be greater than that of the heating portion <NUM>.

As shown in <FIG>, in this embodiment, the liquid-guiding substrate <NUM> is a dense liquid-guiding substrate and includes a plurality of first micropores <NUM>. The plurality of first micropores <NUM> are designed through holes penetrating the first surface <NUM> and the second surface <NUM>. The aerosol-generating substance in the liquid storage cavity <NUM> reaches the liquid-guiding substrate <NUM> of the heating body <NUM> through the liquid supplying channel <NUM>. The aerosol-generating substance is guided from the second surface <NUM> of the liquid-guiding substrate <NUM> to the first surface <NUM> of the liquid-guiding substrate <NUM> through the capillary force of the plurality of first micropores <NUM> of the liquid-guiding substrate <NUM>, so that the aerosol-generating substance is atomized by the heating material layer <NUM> arranged on the first surface <NUM>. That is, the plurality of first micropores <NUM> are in fluid communication with the liquid storage cavity <NUM> through the liquid supplying channel <NUM>. The material of the liquid-guiding substrate <NUM> may be quartz, glass, or dense ceramic, and in this case, the plurality of first micropores <NUM> are straight through holes. When the material of the liquid-guiding substrate <NUM> is glass, the glass may be one of common glass, quartz glass, borosilicate glass, or photosensitive lithium aluminosilicate glass.

In an embodiment, the plurality of first micropores <NUM> are only provided in the heating region a of the liquid-guiding substrate <NUM>, and no first micropore <NUM> is provided in the electrode region b. In an embodiment, the heating portion <NUM> is not only arranged on the first surface <NUM>, but is also arranged on the inner surface of each of the plurality of first micropores <NUM>. The first protecting film <NUM> is also arranged in each of the plurality of first micropores <NUM> and totally covers the heating portion <NUM> arranged on the inner surface of each of the plurality of first micropores <NUM>.

It may be understood that, when the power of the electronic atomization device ranges from <NUM> W to <NUM> W and the voltage of the battery ranges from <NUM> V to <NUM> V, to reach an operating resistance of the battery, the resistance of the heating material layer <NUM> of the heating body <NUM> at the normal temperature ranges from <NUM> S2 to <NUM>Ω. In this embodiment, the heating material layer <NUM> covers the entire heating region a.

In the present disclosure, the plurality of first micropores <NUM> having the capillary forces are provided on the liquid-guiding substrate <NUM>, so that a porosity of the heating body <NUM> may be accurately controlled, thereby improving the product consistency. That is, in the mass production, the porosity of the liquid-guiding substrate <NUM> in the heating body <NUM> is subsequently consistent, and the thickness of the heating material layer <NUM> formed on the liquid-guiding substrate <NUM> is uniform, so that atomization effects of electronic atomization devices produced in the same batch are consistent.

Compared with an existing cotton core heating body and a porous ceramic heating body, the heating body <NUM> provided in the present disclosure which has a thin-sheet structure and is defined with the first micropores <NUM> has a shorter liquid supplying channel and a greater liquid supplying speed, but also has a larger risk of liquid leakage. Therefore, the inventor of the present disclosure researched an impact of a ratio of the thickness of the liquid-guiding substrate <NUM> to a pore size of the first micropore <NUM> on the liquid supplying of the heating body <NUM>, and found that the risk of liquid leakage may be reduced by increasing the thickness of the liquid-guiding substrate <NUM> and reducing the pore size of the first micropore <NUM> while a liquid supplying speed may also be reduced; and the liquid supplying speed may be increased by reducing the thickness of the liquid-guiding substrate <NUM> and increasing the pore size of the plurality of first micropore <NUM> while the risk of liquid leakage may also be increased. That is, the risk of liquid leakage conflicts with the liquid supplying speed. Therefore, in the present disclosure, the thickness of the liquid-guiding substrate <NUM>, the pore size of the first micropore <NUM>, and the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> are designed. The heating body <NUM> is configured to operate at the power ranging from <NUM> W to <NUM> W, and the voltage ranging from <NUM> V to <NUM> V, such that sufficient liquid supplying is achieved while the liquid leakage is prevented V. The thickness of the liquid-guiding substrate <NUM> is a distance between the first surface <NUM> and the second surface <NUM>.

In addition, the inventor of the present disclosure further researched a ratio of a distance between centers of two adjacent first micropores <NUM> to the pore size of the first micropore <NUM>, and found that when the ratio of the distance between the centers of the two adjacent first micropores <NUM> to the pore size of the first micropore <NUM> is excessively great, the liquid-guiding substrate <NUM> has a greater intensity and is easy to be manufactured, while the porosity is excessively less, which easily leads to an insufficient liquid supplying amount. When the ratio of the distance between the centers of the adjacent two first micropores <NUM> to the pore size of the first micropore <NUM> is excessively small, the porosity is greater, which brings a sufficient liquid supplying amount, while the liquid-guiding substrate <NUM> has less intensity and is hard to be manufactured. Therefore, in the present disclosure, the ratio of the distance between the centers of the adjacent two first micropores <NUM> to the pore size of the first micropore <NUM> is further designed, so that the intensity of the liquid-guiding substrate <NUM> is improved as much as possible in a condition that the liquid supplying capability is met.

A case in which the material of the liquid-guiding substrate <NUM> is glass is described below.

Both the first surface <NUM> and the second surface <NUM> include smooth surfaces, and the first surface <NUM> is a flat surface. That is, the first surface <NUM> of the liquid-guiding substrate <NUM> is a smooth flat surface. The first surface <NUM> is configured to be the smooth flat surface, such that a metal material can deposited to form a film with a less thickness, i.e., the heating material layer <NUM> is formed on the first surface <NUM> of the liquid-guiding substrate <NUM>.

In an embodiment, both the first surface <NUM> and the second surface <NUM> of the liquid-guiding substrate <NUM> are smooth flat surfaces, and the first surface <NUM> and the second surface <NUM> of the liquid-guiding substrate <NUM> are arranged parallel to each other. The axi of the first micropores <NUM> is perpendicular to the first surface <NUM> and the second surface <NUM>, and in this case, the thickness of the liquid-guiding substrate <NUM> is equal to the length of the first micropore <NUM>. It may be understood that, the second surface <NUM> is parallel to the first surface <NUM>, and the plurality of first micropores <NUM> penetrate from the first surface <NUM> to the second surface <NUM>, so that a manufacture process of the liquid-guiding substrate <NUM> is simple and the cost is reduced. The distance between the first surface <NUM> and the second surface <NUM> is the thickness of the liquid-guiding substrate <NUM>.

In an embodiment, the first surface <NUM> of the liquid-guiding substrate <NUM> is the smooth flat surface, and the second surface <NUM> of the liquid-guiding substrate <NUM> is a smooth non-flat surface such as an inclined surface, a cambered surface, a serrated surface, or the like. The second surface <NUM> may be designed according to the specific requirement, in a condition that the plurality of first micropores <NUM> penetrate the first surface <NUM> and the second surface <NUM>.

In an embodiment, a cross section of the first micropore <NUM> is in shape of a circle. The plurality of first micropores <NUM> may be straight through holes having uniform pore sizes or may be straight through holes having non-uniform pore sizes, in a condition that a changing range of the pore size falls within <NUM>%. For example, due to the limitation of a preparation process, the first micropore <NUM> provided on the glass through laser induction and corrosion, may generally have greater pore sizes at two ends and a less pore size at a middle portion. Therefore, it is only required to ensure that the pore size at the middle portion of the first micropore <NUM> is greater than or equal to a half of the pore sizes at the two ends.

The thickness of the liquid-guiding substrate <NUM>, the pore size of the first micropore <NUM>, the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM>, and the ratio of the distance between the centers of the adjacent two first micropores <NUM> to the pore size of the first micropore <NUM> in a case where the material of the liquid-guiding substrate <NUM> is the glass, and both the first surface <NUM> and the second surface <NUM> of the liquid-guiding substrate <NUM> are the smooth flat surfaces and are arranged parallel to each other, are described below.

The thickness of the liquid-guiding substrate <NUM> ranges from <NUM> to <NUM>. When the thickness of the liquid-guiding substrate <NUM> is greater than <NUM>, a liquid supplying requirement cannot be met, leading to a decrease in the amount of the aerosol, a great heat loss, and a high cost for providing the plurality of first micropores <NUM>. When the thickness of the liquid-guiding substrate <NUM> is less than <NUM>, the intensity of the liquid-guiding substrate <NUM> cannot be ensured, which affects the improvement of the performance of the electronic atomization device. In an embodiment, the thickness of the liquid-guiding substrate <NUM> ranges from <NUM> to <NUM>. It may be understood that, the thickness of the liquid-guiding substrate <NUM> is selected according to an actual requirement.

The pore size of the first micropore <NUM> on the liquid-guiding substrate <NUM> ranges from <NUM> to <NUM>. When the pore size of the first micropore <NUM> is less than <NUM>, the liquid supplying requirement cannot be met, leading to the decrease in the amount of the aerosol. When the pore size of the first micropore <NUM> is greater than <NUM>, the aerosol-generating substance may easily leak out from the plurality of first micropores <NUM> to the first surface <NUM> to cause the liquid leakage, leading to a decrease in the atomization efficiency. In an embodiment, the pore size of the first micropore <NUM> ranges from <NUM> to <NUM>. It may be understood that, the pore size of the first micropore <NUM> is selected according to the actual requirement.

In an embodiment, the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>. In an embodiment, the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>. When the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> is greater than <NUM>:<NUM>, the amount of the aerosol-generating substance provided to the heating body <NUM> by means of the capillary force of the plurality of first micropores <NUM> may be difficult to meet an atomization amount required by the heating body <NUM>, which not only easily leads to dry burning but also causes a decrease in the amount of the aerosol generated in a single atomization process. When the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> is less than <NUM>:<NUM>, the aerosol-generating substance may easily leak out from e the plurality of first micropores <NUM> to the first surface <NUM> to cause a waste of the aerosol-generating substance, leading to the decrease in the atomization efficiency and further causing a decrease in a total amount of the aerosol.

The ratio of the distance between the centers of the two adjacent first micropores <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>, so that the intensity of the liquid-guiding substrate <NUM> is improved as much as possible in a condition that the plurality of first micropores <NUM> on the liquid-guiding substrate <NUM> meet the liquid supplying capability. In an embodiment, the ratio of the distance between the centers of the two adjacent first micropores <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>. In an embodiment, the ratio of the distance between the centers of the two adjacent first micropores <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>.

In a specific embodiment, the ratio of the thickness of the liquid-guiding substrate <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>, and the ratio of the distance between the centers of the two adjacent first micropores <NUM> to the pore size of the first micropore <NUM> ranges from <NUM>:<NUM> to <NUM>:<NUM>.

In this embodiment, the liquid-guiding substrate <NUM> is in the shape of a flat plate. For example, the liquid-guiding substrate <NUM> is in the shape of a rectangular plate or a circular plate, which is designed as required. In some other embodiments, the liquid-guiding substrate <NUM> is in the shape of an arc or a barrel. The plurality of first micropores <NUM> are arranged in an array in the heating region a. That is, the plurality of first micropores <NUM> provided on the liquid-guiding substrate <NUM> are regularly arranged, and distances between centers of adjacent first micropores <NUM> among the plurality of first micropores <NUM> are the same. The pore sizes of the plurality of first micropores <NUM> may be the same or may be different, which is designed as required.

The liquid-guiding substrate <NUM> in the heating body <NUM> is a dense material, so that the liquid-guiding substrate may have the structure supporting function. Compared with a spring-shaped metal heating wire in the existing cotton core heating body or a metal thick-film wire in the existing porous ceramic heating body, both the intensity and the thickness of the heating material layer <NUM> in the heating body <NUM> are not required, and the heating material layer <NUM> may adopt a metal material having a low resistivity, such as gold, or aluminum.

In an embodiment, the heating material layer <NUM> formed on the first surface <NUM> of the liquid-guiding substrate <NUM> is a heating film. The thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>, i.e., the heating material layer <NUM> has a less thickness. In an embodiment, the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. In an embodiment, the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. When the heating material layer <NUM> is the heating film, a plurality of second micropores <NUM> corresponding to the plurality of first micropores <NUM> are provided on the heating material layer <NUM>. The heating material layer <NUM> is further formed on the inner surface of each of the plurality of first micropores <NUM>. In an embodiment, the heating material layer <NUM> is further formed on the entire inner surface of each of the plurality of first micropores <NUM>. The heating material layer <NUM> is arranged on the inner surface of each of the plurality of first micropores <NUM>, so that the aerosol-generating substance may be atomized in the plurality of first micropores <NUM>, and thereby the atomization effect is improved.

It may be understood that, when the thickness of the heating material layer <NUM> is greater than <NUM>, the heating material layer <NUM> is generally formed in a printing manner, and the plurality of first micropores <NUM> may be blocked when the thickness of the heating material layer <NUM> is excessively great. The thickness of the heating material layer <NUM> may range from <NUM> to <NUM>. In this embodiment, the heating material layer <NUM> covers the entire heating region a, so as to prevent the liquid supplying from being affected. The thickness of the heating material layer <NUM> is less than or equal to <NUM>.

In an embodiment, the resistivity of the heating material layer <NUM> is less than or equal to <NUM>*<NUM>-<NUM> S2. On the basis that the resistance of the heating material layer <NUM> at the normal temperature ranges from <NUM>Ω to <NUM>Ω, the metal material having a low electrical conductivity is adopted in the present disclosure to form a thinner metal film, so as to reduce an influence on the pore size of the first micropore <NUM> as much as possible. The thinner the heating material layer <NUM> is, the less the influence on the pore size of the first micropore <NUM> is, and a better atomization effect may be achieved. In addition, a thinner heating material layer <NUM> brings a small amount of the heat absorbed by the heating material layer <NUM>, a lower electric and heat loss, and a great temperature increasing speed of the heating body <NUM>.

In an embodiment, the metal material of the heating material layer <NUM> includes silver and alloy thereof, copper and alloy thereof, aluminum and alloy thereof, gold and alloy thereof, nickel and alloy thereof, chromium and alloy thereof, platinum and alloy thereof, titanium and alloy thereof, zirconium and alloy thereof, palladium and alloy thereof, or iron and alloy thereof. In an embodiment, the material of the heating material layer <NUM> may include the aluminum and the alloy thereof and the gold and the alloy thereof. Since the liquid aerosol-generating substance includes various flavors, fragrances, additives, and an element such as sulphur, phosphorus, or chlorine. The gold includes quite strong chemical inertness, and a dense oxide thin film may be generated on the surface of the aluminum, so that the two materials are quite stable in the liquid aerosol-generating substance, and are selected as the material of the heating material layer <NUM>.

In an embodiment, the heating material layer <NUM>, the first protecting film <NUM>, and the second protecting film <NUM> may be formed on the first surface <NUM> of the liquid-guiding substrate <NUM> by means of a physical vapor deposition (such as magnetron sputtering, vacuum evaporation, or ion plating) or a chemical vapor deposition (ion-assisted chemical deposition, laser-assisted chemical deposition, or metal organic compound deposition).

It may be understood that, by means of forming processes of the heating material layer <NUM> and the first protecting film <NUM>, the plurality of first micropores <NUM> may not be covered by the heating material layer and the first protecting film. Both the heating material layer <NUM> and the first protecting film <NUM> extend into the wall surface of each of the plurality of first micropores <NUM>. While the heating material layer <NUM> and the first protecting film <NUM> are formed on the first surface <NUM> of the liquid-guiding substrate <NUM> by means of the physical vapor deposition or the chemical vapor deposition, while the heating material layer <NUM> and the first protecting film <NUM> are also formed on the inner surface of each of the plurality of first micropores <NUM>. When the heating material layer <NUM> and the first protecting film <NUM> are formed on the first surface <NUM> of the liquid-guiding substrate <NUM> by means of the magnetron sputtering, a metal atom is perpendicular to the first surface <NUM> and parallel to the inner surface of each of the plurality of first micropores <NUM>, so that the metal atom is more easily deposited on the first surface <NUM>. When the thickness of the heating material layer <NUM> and the first protecting film <NUM> formed by depositing metal atoms on the first surface <NUM> is <NUM>, while the thickness of the metal atoms deposited on the inner surface of each of the plurality of first micropores <NUM> is far less than <NUM> and even less than <NUM>. A less the thickness of the heating material layer <NUM> and the first protecting film <NUM> deposited on the first surface <NUM> is, the less the thickness of the heating material layer <NUM> and the first protecting film <NUM> formed on the inner surface of each of the plurality of first micropores <NUM>, and the less the influence on the pore sizes of the plurality of first micropores <NUM> are. Since the thicknesses of the heating material layer <NUM> and the first protecting film <NUM> are far less than the pore size of the first micropore <NUM>, and the thickness of the portions of the heating material layer <NUM> and the first protecting film <NUM> deposited in each of the plurality of first micropores <NUM> is less than the thickness of the portions deposited on the first surface <NUM> of the liquid-guiding substrate <NUM>, the influence of the heating material layer <NUM> and the first protecting film <NUM> deposited in each of the plurality of first micropores <NUM> on the pore sizes of the plurality of first micropores <NUM> may be omitted.

In some other embodiments, the material of the liquid-guiding substrate <NUM> is porous ceramic, and a plurality of capillary holes interconnected and distributed in an undersigned manner are provided in the porous ceramic. The capillary holes of the porous ceramic are configured to guide liquid. The liquid-guiding substrate <NUM> includes a plurality of undesigned through holes. The first protecting film <NUM> is arranged on the heating portion <NUM> of the heating material layer <NUM>, and the second protecting film <NUM> is arranged on the connection portion <NUM> of the heating material layer <NUM>, so as to protect the heating material layer <NUM>. That is, the first protecting film <NUM> and the second protecting film <NUM> provided in the present disclosure may be applied to the surface of a conventional porous ceramic heating body to protect its heating material layer.

As shown in <FIG> is a structural schematic view of the heating body according to a second embodiment of the present disclosure. The liquid-guiding substrate <NUM> may also be composite ceramic. The liquid-guiding substrate <NUM> includes a porous ceramic layer and a dense ceramic layer arranged in a stacking manner. The dense ceramic layer includes a plurality of designed straight through holes perpendicular to the direction of the thickness of the liquid-guiding substrate <NUM>. The heating material layer <NUM> is arranged on the surface of the dense ceramic layer away from the porous ceramic layer. The liquid-guiding substrate <NUM> includes a first sub liquid-guiding substrate 111a and a second sub liquid-guiding substrate 111b, that is, the first sub liquid-guiding substrate 111a is the porous ceramic layer, and the second sub liquid-guiding substrate 111b is the dense ceramic layer. The surface of the first sub liquid-guiding substrate 111a away from the second liquid-guiding substrate 111b is the second surface <NUM> of the liquid-guiding substrate <NUM>, and the surface of the second sub liquid-guiding substrate 111b away from the first liquid-guiding substrate 111a is the first surface <NUM>. The material of the first sub liquid-guiding substrate 111a is the porous ceramic, and the first sub liquid-guiding substrate 111a includes a plurality of undesigned through holes. The material of the second sub liquid-guiding substrate 111b is the dense ceramic, and the second sub liquid-guiding substrate 111b includes the plurality of first micropores <NUM>. The plurality of first micropores <NUM> are through holes, and an axis of each of the plurality of first micropores <NUM> is parallel to the direction of the thickness of the second sub liquid-guiding substrate 111b. The heating material layer <NUM> is arranged on the surface of the second sub liquid-guiding substrate 111b away from the first liquid-guiding substrate 111a. The first protecting film <NUM> is arranged on the heating portion <NUM> of the heating material layer <NUM>, and the second protecting film <NUM> is arranged on the connection portion <NUM> of the heating material layer <NUM>, so that the heating material layer <NUM> is protected.

As shown in <FIG> is a structural schematic view of the heating body according to a third embodiment of the present disclosure.

A difference between the heating body <NUM> shown in <FIG> and the heating body <NUM> shown in <FIG> lies in that: in <FIG>, the heating material layer <NUM> covers the entire heating region a or crosses the entire heating region a. , while in <FIG>, the heating material layer <NUM> covers a part of the heating region a. That is, the shape of the heating material layer <NUM> in <FIG> is different from the shape of the heating material layer <NUM> in <FIG>, and other same structures are not repeated herein.

As shown in <FIG>, the heating portion <NUM> of the heating material layer <NUM> is in the shape of a S-shaped bended strip, to form a temperature field having a temperature gradient on the first surface <NUM> of the liquid-guiding substrate <NUM>. That is, a high-temperature region and a low-temperature region are formed on the first surface <NUM> of the liquid-guiding substrate <NUM>, so as to atomize various components in the aerosol-generating substance to the greatest extent. Two ends of the heating portion <NUM> are connected to a connection portion <NUM>, respectively. The sizes of the connection portions <NUM> are greater than the size of the heating portion <NUM>, such that the connection portion <NUM> may be better electrically connected to the power supply assembly <NUM>. The resistivity of the heating material layer <NUM> is less than or equal to <NUM>* <NUM>-<NUM>Ω·m. In an embodiment, the heating portion <NUM> and the connection portion <NUM> are integrally formed.

The first protecting film <NUM> is arranged on the surface of the heating portion <NUM> away from the liquid-guiding substrate <NUM>, the second protecting film <NUM> is arranged on the surface of the connection portion <NUM> away from the liquid-guiding substrate <NUM>. Reference may be made to the foregoing description of the first protecting film <NUM> and the second protecting film <NUM> for details.

In an embodiment, the heating material layer <NUM> formed on the first surface <NUM> of the liquid-guiding substrate <NUM> is the heating film, and the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. That is, the thickness of the heating material layer <NUM> is less. In an embodiment, the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. In an embodiment, the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. In an embodiment, the heating material layer <NUM> is formed by means of the physical vapor deposition (such as the magnetron sputtering, the vacuum evaporation, or the ion plating) or the chemical vapor deposition (the iron-assisted chemical deposition, the laser-assisted chemical deposition, or the metal organic compound deposition).

In another embodiment, the thickness of the heating material layer <NUM> formed on the first surface <NUM> of the liquid-guiding substrate <NUM> ranges from <NUM> to <NUM>. That is, the thickness of the heating material layer <NUM> is greater. In an embodiment, the thickness of the heating material layer <NUM> ranges from <NUM> to <NUM>. In an embodiment, the heating material layer <NUM> is formed on the first surface <NUM> of the liquid-guiding substrate <NUM> in the printing manner. That is, the heating material layer <NUM> is a printed metal slurry layer. Since the first surface <NUM> of the liquid-guiding substrate <NUM> has a low roughness, a consecutive film shape may be formed when the thickness of the heating material layer <NUM> is less than <NUM>.

It may be understood that, the heating material layer <NUM> in <FIG> covers a part of the heating region a, and the thickness of the heating material layer <NUM> may be set to range from <NUM> to <NUM>. Even if a region where the heating material layer <NUM> is arranged blocks a part of the plurality of first micropores <NUM>, the other first micropores <NUM> may be configured to supply the liquid. The liquid-guiding substrate <NUM> of the heating body <NUM> shown in <FIG> may be the dense liquid-guiding substrate, the porous ceramic, or the composite ceramic (as the liquid-guiding substrate <NUM> shown in <FIG>).

As shown in <FIG> is a structural schematic view of the heating body according to a fourth embodiment of the present disclosure.

A difference between the heating body <NUM> shown in <FIG> and the heating body <NUM> shown in <FIG> lies in that: the shape of the heating material layer <NUM> of the heating body <NUM> shown in <FIG> is different from the shape of the heating material layer <NUM> of the heating body <NUM> shown in <FIG>, and other same structures are not repeated herein again.

As shown in <FIG>, the liquid-guiding substrate <NUM> is in the shape of the flat plate. The heating portion <NUM> of the heating material layer <NUM> includes a plurality of first sub heating portions 1121a extending in a first direction and a plurality of second sub heating portions 1121b extending in a second direction. Two adjacent first sub heating portions 1121a are connected by one of the second heating portions 1121b. Two connection portions <NUM> are arranged on the same side of the heating portion <NUM>. The width of each of the connection portion <NUM> is greater than the width of the heating portion <NUM>.

The first protecting film <NUM> is arranged on the surface of the heating portion <NUM> away from the liquid-guiding substrate <NUM>, and the second protecting film <NUM> is arranged on the surface of the connection portion <NUM> away from the liquid-guiding substrate <NUM>. Reference may be made to the foregoing descriptions of the first protecting film <NUM> and the second protecting film <NUM> for details.

As shown in <FIG> is a structural schematic view of the heating body according to a fifth embodiment of the present disclosure.

A difference between the heating body <NUM> shown in <FIG> and the heating body <NUM> shown in <FIG> lies in that: the shape of the heating body <NUM> in <FIG> is different from the shape of the heating body <NUM> in <FIG>. Other same structures are not repeated herein.

As shown in <FIG>, the liquid-guiding substrate <NUM> is in the shape of the barrel. The liquid-guiding substrate <NUM> is the dense liquid-guiding substrate, and includes the plurality of first micropores <NUM>. The plurality of first micropores <NUM> are straight through holes penetrating the first surface <NUM> and the second surface <NUM>. The first surface <NUM> is the inner surface of the barrel-shaped liquid-guiding substrate <NUM>, and the second surface <NUM> is an outer surface of the barrel-shaped liquid-guiding substrate <NUM>. The heating material layer <NUM> is arranged on the first surface <NUM> of the liquid-guiding substrate <NUM>. The first protecting film <NUM> and the second protecting film <NUM> are arranged on the surface of the heating material layer <NUM> away from the liquid-guiding substrate <NUM>. It should be noted that, the first protecting film <NUM> and the second protecting film <NUM> are not marked in <FIG>.

As shown in <FIG> is a structural schematic view of the heating body according to a sixth embodiment of the present disclosure.

As shown in <FIG>, the liquid-guiding substrate <NUM> is in the shape of the barrel. The liquid-guiding substrate <NUM> is the dense liquid-guiding substrate, and includes the plurality of first micropores <NUM>. The plurality of first micropores <NUM> are straight through holes penetrating the first surface <NUM> and the second surface <NUM>. The first surface <NUM> is the inner surface of the barrel-shaped liquid-guiding substrate <NUM>, and the second surface <NUM> is the outer surface of the barrel-shaped liquid-guiding substrate <NUM>. The heating material layer <NUM> is arranged on the second surface <NUM> of the liquid-guiding substrate <NUM>. The first protecting film <NUM> and the second protecting film <NUM> are arranged on the surface of the heating material layer <NUM> away from the liquid-guiding substrate <NUM>. It should be noted that, the first protecting film <NUM> and the second protecting film <NUM> are not marked in <FIG>.

A relationship among the material of the heating material layer <NUM>, the material of the first protecting film <NUM>, and the material of the second protecting film <NUM> and the service life of the heating body <NUM>, and a relationship among the material of the first protecting film <NUM>, and the material of the second protecting film <NUM> and the atomization amount will be verified through experiments below. As shown in <FIG> is a schematic view of a process of a wet burning experiment on the heating body according to the present disclosure.

Experiment one: the heating body <NUM> is loaded with a cartridge and wet burnt to evaluate the service life of the heating body <NUM>. Experiment conditions: the power is supplied at a constant power of <NUM> W, <NUM> of inhalation and stopped for <NUM>, and the aerosol-generating substance is cola ice, <NUM>. A case in which the heating body <NUM> is provided with the first protecting film <NUM> is compared to a case in which the heating body <NUM> is not provided with the protecting film. The first protecting film <NUM> is configured to include different materials for comparison. A normal applied environment of the electronic atomization device is simulated to perform the experiments (As shown in <FIG>). A comparison result is shown in Table <NUM>, and the relationship among the material of the heating material layer <NUM>, and the material of the first protecting film <NUM>, and the service life of the heating body <NUM> is obtained. In <FIG>, the power is supplied by means of a direct current power supply. An ejector pin <NUM> of the power supply assembly <NUM> (the ejector pin <NUM> is electrically connected to a battery) is connected to a corresponding connection portion <NUM> of the heating material layer <NUM> to control the energized power and the energized duration.

The flavors and fragrances and the additives include the element such as the sulphur, the phosphorus, or the chlorine, when the heating body <NUM> is not provided with the first protecting film <NUM>, the silver and the copper are easily corroded by the flavors and fragrances and the additives in the aerosol-generating substance when serving as the material of the heating material layer <NUM>. The requirement of the service life is difficult to be met. When serving as the material of the heating material layer <NUM>, the aluminum may support over <NUM> times of thermal cycles, which meets a serving condition of the closed electronic atomization device, but is difficult to meet a requirement of an open electronic atomization device being sucked for <NUM> times.

Therefore, the first protecting film <NUM> is arranged on the surface of the heating material layer <NUM> to improve the service life of the heating material layer <NUM>. The material of the first protecting film <NUM> is a ceramic material resistant to the corrosion of the aerosol-generating substance, such as the aluminum nitride, the silicon nitride, the aluminum oxide, the silicon oxide, the silicon carbide, or the zirconium oxide. No matter the material of the heating material layer <NUM> is the silver, the copper, or the aluminum, the service life of the heating body <NUM> may all be greatly improved after the first protecting film <NUM> is adopted.

Experiment two: the heating body <NUM> is loaded with the cartridge and wet burnt to evaluate the service life of the heating body <NUM>. Experiment conditions: the power is supplied at the constant power of <NUM> W, <NUM> of inhalation and stopped for <NUM> seconds, and the aerosol-generating substance is the cola ice, <NUM>. Atomization amounts of the heating body <NUM> corresponding to first protecting films <NUM> including different materials are compared. The normal serving environment of the electronic atomization device is simulated to perform the experiments (As shown in <FIG>). A comparison result is shown in Table <NUM>, and the relationship between the material of the first protecting film <NUM> and the atomization amount is obtained. In <FIG>, the power is supplied by the direct current power supply. The ejector pin <NUM> of the power supply assembly <NUM> (the ejector pin <NUM> is electrically connected to the battery) is connected to the corresponding connection portion <NUM> of the heating material layer <NUM> to control the energized power and the energized duration.

It can be read from <FIG>, the atomization amount is apparently improved when the material of the first protecting film <NUM> selects the ceramic material (such as the aluminum nitride or the silicon nitride) when compared with the metal material (such as the <NUM> stainless steel).

Claim 1:
A heating body (<NUM>), applied to an electronic atomization device (<NUM>) and configured to atomize an aerosol-generating substance, the heating body (<NUM>) comprises:
a liquid-guiding substrate (<NUM>);
a heating material layer (<NUM>), arranged on a first surface (<NUM>) of the liquid-guiding substrate (<NUM>), wherein the heating material layer (<NUM>) is a resistance heating material, and comprises:
a heating portion (<NUM>), wherein a portion of the liquid-guiding substrate (<NUM>), where the heating portion (<NUM>) is arranged, is defined as a heating region (a); and
a connection portion (<NUM>), wherein another portion of the liquid-guiding substrate (<NUM>), where the connection portion (<NUM>) is arranged, is defined as an electrode region (b) characterized by
a first protecting film (<NUM>), at least partially arranged on the surface of the heating portion (<NUM>) away from the liquid-guiding substrate (<NUM>), wherein the material of the first protecting film (<NUM>) is non-conductive and resistant to corrosion of the aerosol-generating substance; and
a second protecting film (<NUM>), at least partially arranged on the surface of the connection portion (<NUM>) away from the liquid-guiding substrate (<NUM>), wherein the material of the second protecting film (<NUM>) is conductive and resistant to the corrosion of the aerosol-generating substance.