CA3203428A1

CA3203428A1 - Heat generating body and preparation method therefor, atomizer, and electronic device

Info

Publication number: CA3203428A1
Application number: CA3203428A
Authority: CA
Inventors: Hongming Zhou; Wei Zhang; Rihong Li; Wangsheng Liu
Original assignee: Jiangmen Moore Technology Ltd
Current assignee: Jiangmen Moore Technology Ltd
Priority date: 2020-12-29
Filing date: 2021-12-01
Publication date: 2022-07-07
Also published as: US20230337744A1; CN112690507A; WO2022142981A1

Abstract

A heat generating body (10) and a preparation method therefor, an atomizer and an electronic device. The heat generating body (10) comprises a porous ceramic body (110) and a heating element (120). The porous ceramic body (110) comprises a preheating member (112), and the preheating member (112) has a porous infrared ceramic structure. The heating element (120) is located on the porous ceramic body (110), and is used for providing heat to the preheating member (112) and atomizing a pre-heated liquid.

Description

HEAT GENERATING BODY AND PREPARATION METHOD
THEREFOR, ATOMIZER, AND ELECTRONIC DEVICE
TECHNICAL FIELD
This application relates to the field of atomizer technologies, and in particular, to a heating body and a preparation method thereof, an atomizer, and an electronic device.
BACKGROUND
An electronic atomizer mainly includes an atomizer and a battery. The atomizer is an important component of the electronic atomizer, which is configured to atomize an atomization medium for inhalation. In the atomizer, a heating body is a core component of the atomizer that performs an atomization function, which is mainly formed by pre-embedding a heating wire or screen printing a heating film on a ceramic substrate. The heating body in which the heating wire is pre-embedded has advantages such as a simple structure, high atomization efficiency, and a uniform temperature field. The heating body on which the heating film is screen printed has advantages such as a large heating area, being capable of implementing surface atomization, and high thermal efficiency.
However, when atomizing the atomization medium, the two types of heating bodies are prone to problems such as slow formation of an aerosol, and generation of a burnt flavor, miscellaneous air, or the like due to dry heating of the heating body, affecting a user experience.
SUMMARY
Various exemplary embodiments of this application provide a heating body and a preparation method thereof, an atomizer, and an electronic device.
A heating body includes:
a porous ceramic body including a preheating member configured to preheat liquid, where the preheating member is a porous infrared ceramic structure; and a heating member located on the porous ceramic body and is configured to provide heat for the preheating member and atomize preheated liquid.
In the heating body, the porous infrared ceramic structure is used as the preheating member.
The preheating member radiates far infrared rays to preheat liquid by using heat provided by the heating member, thereby reducing viscosity of the liquid and improving fluidity of the Date recue/Date received 2023-05-26 liquid in the porous ceramic body. In this way, the liquid to be atomized may reach the heating member more quickly and be atomized, thereby improving a problem that when an atomization medium is atomized, an aerosol is prone to slow formation. In addition, because the fluidity of the liquid to be atomized in the porous ceramic body is improved, the liquid to be atomized may reach the heating member more quickly, and a problem that the heating body is prone to dry heating is also improved.
In an embodiment, the porous ceramic body further includes a substrate, the preheating member is located on the substrate, the substrate is a porous ceramic structure, and the heating member is completely located in the preheating member and is adjacent to the substrate or is located at a junction of the substrate and the preheating member.
In an embodiment, the substrate is a hollow porous ceramic structure, the preheating member is a hollow porous infrared ceramic structure, and the substrate and the preheating member are nested with each other.
In an embodiment, the preheating member is sleeved on the substrate, and the heating member is spirally distributed on the substrate.
In an embodiment, the heating member includes a heating portion and an infrared heating layer located on the heating portion.
In an embodiment, a thickness of the infrared heating layer ranges from 20 gm to 500 gm.
In an embodiment, the substrate is in a shape of a hollow cylinder, the preheating member is in a shape of a hollow cylinder, the preheating member is sleeved on the substrate, an inner diameter of the substrate ranges from 5 mm to 3 mm, and an outer diameter of the preheating member ranges from 2.5 mm to 9 mm.
In an embodiment, a surface of the substrate adjacent to the preheating member recesses to form a first groove, a surface of the preheating member adjacent to the substrate recesses to form a second groove corresponding to the first groove, the first groove and the second groove form a heating cavity, and the heating member is accommodated in the heating cavity.
In an embodiment, a porosity of the preheating member ranges from 30% to 80%.
In an embodiment, a median pore size of the preheating member ranges from 10 gm to 100 gm. In an embodiment, a radiation wavelength of the preheating member ranges from 5 gm to 20 gm.
In an embodiment, a preheating temperature of the preheating member ranges from 40 C
to 90 C. In an embodiment, a resistance value of the heating member ranges from 0.5 S2 to 5 SI
In an embodiment, a porosity of the substrate ranges from 30% to 80%.

2 Date recue/Date received 2023-05-26 In an embodiment, a median pore size of the substrate ranges from 10 gm to 100 gm.
A method for preparing the heating body includes:
integrally forming, according to a preset shape, the heating member and a raw material configured to prepare the porous ceramic body to prepare a green body; and sintering the green body after degumming to prepare the heating body.
An atomizer includes:
a liquid storage cavity, configured to store liquid; and a heating body, configured to absorb liquid in the liquid storage cavity and atomize the liquid, where the heating body is the foregoing heating body.
An electronic device is provided, including a power supply and the atomizer, where the power supply is electrically connected to the atomizer to supply power to the atomizer.
BRIEF DESCRIPTION OF THE DRAWINGS
To describe the technical solutions in the embodiments of this application more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments or the related art. Apparently, the accompanying drawings in the following description show only some embodiments of this application, and a person of ordinary skill in the art may still derive other accompanying drawings from these accompanying drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a heating body according to an embodiment.
FIG. 2 is an exploded view of the heating body shown in FIG. 1.
FIG. 3 is a cross-sectional view of the heating body shown in FIG. 1.
FIG. 4 is a flowchart of a method for preparing a heating body according to an embodiment.
DETAILED DESCRIPTION
For ease of understanding this application, this application is described more comprehensively below. This application may be implemented in many different forms, and is not limited to embodiments described in this specification. On the contrary, the embodiments are provided to make the disclosed content of this application clearer and more comprehensive.
It should be noted that, when a component is expressed as "being fixed to"
another component, the component may be directly on another component, or one or more intermediate components may exist between the component and another component. When one component is expressed as "being connected to" another component, the component may be directly

3 Date recue/Date received 2023-05-26 connected to another component, or one or more intermediate components may exist between the component and another component. Orientation or position relationships indicated by terms such as "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", and "bottom"
are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease of description, rather than indicating or implying that the mentioned apparatus or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as a limitation to this application. In addition, terms "first" and "second" are only used to describe the objective and cannot be understood as indicating or implying relative importance.
Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as those usually understood by a person skilled in the art to which this application belongs. In this application, terms used in the specification of this application are merely intended to describe objectives of specific embodiments, but are not intended to limit this application.
An embodiment of this application provides an atomizer. The atomizer includes a liquid storage cavity and a heating body 10. The liquid storage cavity is configured to store liquid, such as an atomization medium. The heating body 10 is configured to absorb the liquid in the liquid storage cavity and atomize the liquid. In some embodiments, the liquid storage cavity has a liquid outlet, and the heating body 10 is adjacent to the liquid outlet.
The liquid in the liquid storage cavity flows out from the liquid outlet and enters the heating body 10, so as to be atomized. In a specific example, the atomizer is an electronic atomizer.
Referring to FIG. 1 to FIG. 3, the heating body 10 includes a porous ceramic body 110 and a heating member 120 located on the porous ceramic body 110. The porous ceramic body 110 includes a substrate 111 and a preheating member 112 located on the substrate 111. Specifically, the porous ceramic body 110 has a liquid inlet surface 113. The liquid in the liquid storage cavity flows out through the liquid outlet and enters the porous ceramic body 110 from the liquid inlet surface 113.
In some embodiments, the substrate 111 is of a porous ceramic structure and has a liquid guiding function. In some other embodiments, the substrate 111 is of a hollow porous ceramic structure. In the embodiment shown in the figure, the substrate 111 is in a shape of a hollow cylinder. Certainly, in another embodiment, a shape of the substrate 111 is not limited to the hollow cylinder, and may further be another hollow structure.
In this embodiment, a porosity of the substrate 111 ranges from 30% to 80%, and a median pore size of a pore of the substrate 111 ranges from 10 gm to 100 gm. The porosity of the

4 Date recue/Date received 2023-05-26 substrate 111 and a pore size of the pore are set as described above, which is convenient for the substrate 111 to absorb the liquid. In some embodiments, the porosity of the substrate 111 is 30%, 40%, 50%, 60%, 70%, or 80%. The median pore size of the pore of the substrate 111 is gm, 20 gm, 30 gm, 40 gm, 50 gm, 60 gm, 70 gm, 80 gm, 90 gm, or 100 gm. In some other

5 embodiments, a porosity of the substrate 111 ranges from 40% to 70%, and a median pore size of a pore of the substrate 111 ranges from 10 gm to 80 gm. It may be understood that, in other embodiments, the porosity of the substrate 111 and the pore size of the pore are not limited to the above, and may be adjusted according to actual needs.
The preheating member 112 is adjacent to the liquid outlet and is located on the substrate 10 111. The preheating member 112 is of a porous infrared ceramic structure and has a function of guiding liquid and radiating infrared rays. The preheating member 112 has a liquid inlet surface 113, and the liquid enters the preheating member 112 through the liquid inlet surface 113 of the preheating member 112 after flowing out from the liquid storage cavity. When flowing through the preheating member 112, the liquid is preheated by the infrared rays radiated by the preheating member 112, so that viscosity is reduced and fluidity is improved.
In this way, when the heating body 10 atomizes the atomization medium, it is not easy to cause slow formation of an aerosol and dry heating due to the poor fluidity of the atomization medium in the porous ceramic body 110.
In some embodiments, both the preheating member 112 and the substrate 111 are of hollow structures, and the preheating member 112 is sleeved on the substrate 111.
When the preheating member 112 is sleeved on the substrate 111, an outer circumferential surface of the preheating member 112 is the liquid inlet surface 113. The liquid flows out from the liquid storage cavity, enters the preheating member 112 through the outer circumferential surface of the preheating member 112, and is atomized into an aerosol after being preheated by the preheating member 112 and is heated by the heating member 120, and is discharged from an inner circumferential surface of the substrate 111. It may be understood that, the preheating member 112 may also be nested in the substrate 111. That is, the substrate 111 is sleeved on the preheating member 112. In this case, the preheating member 112 is accommodated in a hollow portion of the substrate 111, an inner circumferential surface of the preheating member 112 is the liquid inlet surface 113. The liquid flows out from the liquid storage cavity, enters the preheating member 112 through the inner circumferential surface of the preheating member 112, and is atomized into an aerosol after being preheated by the preheating member 112 and is heated by the heating member 120, and is discharged from the outer circumferential surface of the substrate 111.
In the illustrated embodiment, the preheating member 112 is in a shape of a hollow cylinder.

Date recue/Date received 2023-05-26 In a specific example, the substrate 111 is in a shape of a hollow cylinder, and the preheating member 112 is in a shape of a hollow cylinder. The preheating member 112 is sleeved on the substrate 111. An inner diameter of the substrate 111 ranges from 1.5 mm to 3 mm, and an outer diameter of the preheating member ranges from 2.5 mm to 9 mm. It may be understood that, a size of the substrate 111 is not limited to the above, and a size of the preheating member 112 is not limited to the above, and may further be adjusted according to an actual situation, provided that the shape and size of the preheating member 112 may match that of the substrate 111 and the liquid outlet.
In some embodiments, at least one of the substrate 111 or the preheating member 112 may .. be a non-hollow structure. When the substrate 111 is the non-hollow structure, the preheating member 112 is the hollow structure. In this case, the preheating member 112 is located on one side of a surface of the substrate 111, and the liquid to be atomized is atomized after being preheated by the preheating member 112, and is then discharged from the other side of the substrate 111. When the substrate 111 is a hollow structure, the preheating member 112 may be the non-hollow structure. In this case, the preheating member 112 may be located on the substrate 111 in a stacking manner.
In this embodiment, a porosity of the preheating member 112 ranges from 30% to 80%, and a median pore size of a pore of the preheating member 112 ranges from 10 gm to 100 gm.
The porosity of the preheating member 112 and a pore size of the pore are set as described .. above, which is convenient for the substrate 111 to absorb the liquid. In some embodiments, the porosity of the preheating member 112 is 30%, 40%, 50%, 60%, 70%, or 80%.
The median pore size of the pore of the preheating member 112 is 10 gm, 20 gm, 30 gm, 40 gm, 50 gm, 60 gm, 70 gm, 80 gm, 90 gm, or 100 gm. In some other embodiments, a porosity of the preheating member 112 ranges from 40% to 70%, and a median pore size of a pore of the preheating member 112 ranges from 20 gm to 80 gm. It may be understood that, in other implementations, the porosity of the preheating member 112 and the pore size of the pore are not limited to the above, and may be adjusted according to actual needs.
When far infrared rays irradiate on a heated object, a part of the rays are reflected, and a part of the rays are absorbed by the object. When an emitted far infrared wavelength is consistent with an absorption wavelength of the heated object, the heated object absorbs the far infrared rays. In this case, molecules and atoms in the object "resonate", i.e., producing strong vibrations and rotations, and the vibrations and rotations increase a temperature of the object, achieving the objective of heating the object. Therefore, a wavelength radiated from the preheating member 112 may be selected according to a heated substance. In this embodiment,

6 Date recue/Date received 2023-05-26 the heated substance is an oil atomization medium, and a radiation wavelength of the preheating member 112 ranges from 5 gm to 20 gm. By setting the radiation wavelength of the preheating member 112 to range from 5 gm to 20 gm, effective ingredients (such as essence, glycerin, nicotine, or the like) in the oil atomization medium may be heated precisely, thereby implementing precise atomization, and increasing an effective atomization concentration of the effective ingredients. Certainly, the radiation wavelength of the preheating member 112 is not limited to the above, and may further be other radiation wavelengths, as long as the radiation wavelength of the preheating member 112 may match the absorption wavelength of the heated object.
In an embodiment, the preheating member 112 is of a porous infrared ceramic structure at a room temperature. The room temperature ranges from 25 C to 150 C. In this implementation, a preheating temperature of the preheating member 112 ranges from 40 C to 90 C.
The preheating temperature refers to a temperature that the liquid preheated by the preheating member 112 may reach. The temperature is suitable for preheating an oil atomization medium of an electronic atomizer. Certainly, when the atomized liquid is not the oil atomization medium but other liquid, the preheating temperature of the preheating member 112 may be adjusted according to liquid that specifically needs to be atomized.
The heating member 120 is configured to provide heat for the preheating member 112 and atomize preheated liquid. A part of heat released by the heating member 120 directly heats the liquid to cause the liquid to be atomized, and the other part is conducted to the preheating member 112 to cause the preheating member 112 to absorb the heat and radiate infrared rays.
In some embodiments, the heating member 120 is located in the porous ceramic body 110 and is configured to generate heat. In the illustrated embodiment, the heating member 120 is located at a junction between the substrate 111 and the preheating member 112.
The heating member 120 is arranged at the junction between the substrate 111 and the preheating member 112, so that the heat generated by the heating member 120 is fully used, and preheating and atomization are simultaneously satisfied. Specifically, a surface of the substrate 111 adjacent to the preheating member 112 is recessed to form a first groove 114, a surface of the preheating member 112 adjacent to the substrate 111 is recessed to form a second groove corresponding to the first groove 114. The first groove 114 and the second groove 115 form a heating cavity, and the heating member 120 is accommodated in the heating cavity.
In other embodiments, the heating member 120 may be completely embedded in the preheating member 112, and may also be completely embedded in the substrate 111. For example, the heating member 120 is completely located in the preheating member 112 and is

7 Date recue/Date received 2023-05-26 away from the liquid outlet; or the heating member 120 is completely located in the substrate 111 and is adjacent to the preheating member 112.
In the illustrated embodiment, the heating member 120 is spirally distributed on the substrate 111. Certainly, in some other embodiments, the shape of the heating member 120 is not limited to a shape of a spiral, and may further be another shape. For example, the heating member 120 is in a shape of at least one of a sheet, a strip, an S-shaped, or a U-shaped.
In an embodiment, the heating member 120 includes a heating portion 121.
Optionally, the heating portion 121 is the heating wire. Optionally, in a specific example, the heating portion 121 is a piece of heating wire (that is, monofilament). In this implementation, a resistance value of the heating portion 121 ranges from 0.5 S2 to 1.5 S. In another embodiment, a resistance value of the heating portion 121 ranges from 0.8 S2 to 1.3 S.
In some embodiments, the heating member 120 further includes an infrared heating layer (not shown) on the heating portion 121. The infrared heating layer is arranged on the heating portion 121, so as to increase the heat utilization of the heating portion 121. In this way, the preheating member 112 receives more heat that are more uniform, and preheating is faster. In this embodiment, a thickness of the infrared heating layer ranges from 20 gm to 500 gm. In another embodiment, a thickness of the infrared heating layer ranges from 20 gm to 80 gm.
In some embodiments, the substrate 111 may be omitted. When the substrate 111 is omitted, the heating member 120 may be located in the preheating member 112 and be away from the liquid outlet, so that the liquid is first preheated and then atomized. In this case, the heating member 120 transfers heat energy to the preheating member 112 and enables the preheating member 112 to radiate heat energy to preheat the liquid. The preheated liquid flows through the heating member 120 and is atomized, thereby discharging the aerosol.
Certainly, when the substrate 111 is omitted, the heating member 120 may also be located on an outer surface of the preheating member 112, as long as the heating member 120 can provide heat for the preheating member 112 to preheat the atomization medium and atomize the atomization medium. In an embodiment, the preheating member 112 is a non-hollow structure.
A side of the preheating member 112 is adjacent to the liquid outlet, and the heating member 120 is located on a surface of the preheating member 112 and is away from a side of the liquid outlet.
In this case, the liquid flowing out from the liquid outlet enters the preheating member 112 at a position adjacent to the liquid outlet, is first preheated by the preheating member 112, and is then atomized by the heating member 120 on the surface of the preheating member 112, and is discharged. In another embodiment, the preheating member 112 is of a hollow structure, and the heating member 120 is located on the outer circumferential surface of the preheating

8 Date recue/Date received 2023-05-26 member 112. In this case, after flowing out from the liquid outlet, the liquid enters the preheating member 112 through the inner circumferential surface of the preheating member 112, and is first preheated by the preheating member 112 and is then heated by the heating member, thereby discharging the aerosol from the outer circumferential surface of the preheating member 112.
In some embodiments, the heating member 120 may further be located on the surface of the porous ceramic body 110. For example, when the substrate 111 is omitted, the heating member 120 is located on the outer surface of the preheating member 112.
Certainly, the heating body 10 further includes a connecting member 130. The connecting member 130 is configured to electrically connect the heating member 120 to a power supply.
In the illustrated embodiment, the connecting member 130 passes through the outer circumferential surface of the preheating member 112.
The heating body 10 includes a porous ceramic body 110 and a heating member located on the porous ceramic body 110, which at least has the following advantages:
(1) A part of heat provided by the heating member 120 may cause the preheating member 112 to be heated and radiate infrared rays, thereby preheating the atomization medium. In this way, viscosity of the atomization medium after entering the porous ceramic body 110 is reduced, the fluidity is increased, and the atomization medium may flow to the vicinity of the heating body 10 more quickly, and be heated and atomized by the heating member 120 more quickly.
Therefore, through cooperation between the preheating member 112 and the heating member 120, the heating body 10 causes the atomization medium to guide liquid smoothly in the porous ceramic body 110, and problems such as slow formation of the aerosol and dry heating of the heating body 10 are not prone to occur, which improves a user experience. It is verified that, the heating body 10 has a particularly obvious effect on improving the atomization medium with relatively high viscosity.
(2) Due to the selectivity of a radiation wavelength of infrared heating, the heating body 10 may be designed for the effective components in the atomization medium, so as to implement precise atomization and increase an effective atomization concentration. In addition, because infrared rays of a specific wavelength resonate with the effective components of the atomization medium, the atomization medium is heated, which has a higher thermal efficiency than heating with a heating wire separately, and may significantly reduce energy consumption.
(3) Due to heating uniformity of infrared heating, problems such as an excessively high local temperature caused by uneven heating circuits and a burnt flavor caused by dry heating of the atomization medium may be avoided, and the taste may be improved.

9 Date recue/Date received 2023-05-26 Because the atomizer includes the heating body 10, aerosol is quickly formed, and is not prone to dry heating, and energy is saved.
In addition, an embodiment of this application further provides an electronic device. The electronic device includes a power supply and the atomizer, and the power supply is electrically connected to the atomizer to supply power to the atomizer. More specifically, the electronic device is an electronic atomizer.
In addition, referring to FIG. 4, an embodiment of this application further provides a method for preparing the heating body, including the following steps:
Step S10, according to a preset shape, a raw material configured to prepare the porous ceramic body and the heating member are integrally formed to prepare a green body.
Specifically, the raw material configured to prepare the porous ceramic body includes a raw material configured to prepare the substrate and a raw material configured to prepare the preheating member.
The raw material configured to prepare the substrate includes ceramic powder, sintering auxiliary agent, and pore-forming agent. Specifically, types of the ceramic powder, the pore-forming agent, and the sintering auxiliary agent are not particularly limited, and the ceramic powder, the pore-forming agent, and the sintering auxiliary agent commonly used in the art may be used. For example, the ceramic powder may use a diatomite system or a zeolite system.
It should be noted that, "ceramic powder" refers to a powdered material obtained by fully and uniformly mixing and roasting the raw material (excluding the sintering auxiliary agent and the pore-forming agent) used in the preparation of a ceramic.
In an embodiment, in parts by mass, the raw material configured to prepare the substrate includes 40 to 70 parts of ceramic powder, 5 to 30 parts of sintering auxiliary agent, and 10 to parts of pore-forming agent. In some other embodiments, in parts by mass, the raw material 25 configured to prepare the substrate includes 45 to 70 parts of ceramic powder, 10 to 30 parts of sintering auxiliary agent, and 15 to 30 parts of pore-forming agent.
Certainly, in another embodiment, types and contents of components of the raw material configured to prepare the substrate are not limited to the above, and may further be adjusted according to an actual situation.
30 The raw material configured to prepare the preheating member includes the ceramic powder, the sintering auxiliary agent, and the pore-forming agent, where the ceramic powder includes far infrared ceramic powder. The far infrared ceramic powder refers to ceramic powder with far infrared radiation performance. The far infrared ceramic powder includes at least one of far infrared ceramic powder with a spinel or inverse spinel ferrite structure, or high-Date recue/Date received 2023-05-26 performance infrared ceramic powder prepared by mixing and sintering a transition metal oxide and a cordierite system silicate material. In some embodiments, the far infrared ceramic powder with the spinel or inverse spinel ferrite structure is far infrared ceramic powder with a spinel or inverse spinel ferrite structure including a transition metal oxide (such as NiO, Cr203, Ti02, Mil02, CUO, COO, Fe203, ZnO, or the like).
In an embodiment, in parts by mass, the raw material configured to prepare the preheating member includes 40 to 80 parts of ceramic powder, 5 to 30 parts of sintering auxiliary agent, and 10 to 30 parts of pore-forming agent, where the ceramic powder is the far infrared ceramic powder. In some other embodiments, in parts by mass, the raw material configured to prepare the preheating member includes 50 to 80 parts of far infrared ceramic powder,

10 to 30 parts of sintering auxiliary agent, and 15 to 30 parts of pore-forming agent, where the ceramic powder is the far infrared ceramic powder.
In some other embodiments, the raw material configured to prepare the preheating member includes the far infrared ceramic powder and the ordinary ceramic powder. That is, the ceramic powder in the raw material configured to prepare the preheating member includes the far infrared ceramic powder, the ordinary ceramic powder, the sintering auxiliary agent, and the pore-forming agent. In a specific example, in parts by mass, the raw material configured to prepare the preheating member includes 40 to 80 parts of ceramic powder, 5 to 30 parts of sintering auxiliary agent, and 10 to 30 parts of pore-forming agent, where the ceramic powder includes the far infrared ceramic powder and the ordinary ceramic powder. In some other embodiments, in parts by mass, the raw material configured to prepare the preheating member includes 45 to 70 parts of far infrared ceramic powder, 10 to 30 parts of sintering auxiliary agent, and 15 to 30 parts of pore-forming agent, where the ceramic powder includes the far infrared ceramic powder and the ordinary ceramic powder. Certainly, in another embodiment, types and contents of components of the raw material configured to prepare the preheating member are not limited to the above, and may further be adjusted according to an actual situation.
In an embodiment, the heating member includes a heating portion and an infrared heating layer located on the heating portion.
A material of the heating portion is not particularly limited, and may be selected according to a resistance value of a heating member that needs to be prepared.
A material configured to prepare an infrared heating layer includes the far infrared ceramic powder, a binder, and a solvent. The far infrared ceramic powder may be the same as the far infrared ceramic powder used in the preheating member, and may also be different from the far

11 Date recue/Date received 2023-05-26 infrared powder used in the preheating member. The binder is selected from at least one of an inorganic binder or an organic binder. Specifically, the inorganic binder is selected from at least one of aluminum sol or sodium silicate. The organic binder is selected from at least one of Carboxymethyl Cellulose (CMC), acrylic polymer, polyvinyl alcohol (PVA), or dextrin.
Certainly, the binder is not limited to the above, and may further be other substances that may be used as the binder.
In an embodiment, a step of preparing the heating member with the infrared heating layer includes: preparing a material configured to prepare the infrared heating layer into a slurry; and the slurry is sprayed on the heating wire by using a spraying process (for example, ion spraying, a spraying gun, or the like), and is then formed, degummed, and sintered, to prepare a heating body. It may be understood that, after being sintered first, the heating member may be formed together with the raw material configured to prepare the porous ceramic body, be degummed, and be sintered, to prepare the heating body. The formed heating member (a green body of the heating member) may also be formed again together with the raw material configured to prepare the porous ceramic body, and then be degummed and sintered, to prepare the heating body.
It should be noted that, a problem of shrinkage matching between the preheating member and the substrate after sintering may be resolved by adjusting a mass ratio of the sintering auxiliary agent, the pore-forming agent, and skeleton-forming agent.
In an embodiment, a molding manner in a process of preparing the green body is one of injection molding, gel injection molding, or dry pressing molding. Certainly, the molding manner in the process of preparing the green body is not limited to the above, and another manner may further be used.
Step S402, after degumming, the green body is sintered to prepare the heating body.
Specifically, a temperature for degumming ranges from 350 C to 700 C; and a temperature for sintering ranges from 800 C to 1200 C. In some other embodiments, a temperature for degumming ranges from 450 C to 650 C; and a temperature for sintering ranges from 750 C
to 1100 C. Certainly, in another embodiment, the temperature for degumming and the temperature for sintering are not limited to the above, and the temperature for degumming and the temperature for sintering may be adjusted according to the prepared porous ceramic body.
The preparation method for the heating body is simple and convenient, and the prepared heating body has a preheating function, and has a good liquid guiding effect.
Especially for liquid with relatively high viscosity, problems such as poor liquid guiding and dry heating of the heating body are not prone to occur. In addition, a preparation method for the heating body

12 Date recue/Date received 2023-05-26 is simple and convenient, and is easy for industrial production.
The technical features in the foregoing embodiments may be randomly combined.
For concise description, not all possible combinations of the technical features in the embodiments are described. However, as long as combinations of the technical features do not conflict with each other, the combinations of the technical features are considered as falling within the scope described in this specification.
The foregoing embodiments merely express several implementations of this application.
The descriptions thereof are relatively specific and detailed, but should not be understood as limitations to the scope of this application. For a person of ordinary skill in the art, several transformations and improvements can be made without departing from the idea of this application. These transformations and improvements belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.

13 Date recue/Date received 2023-05-26

Claims

CA 03203428 2023-05-26What is claimed is:

1. A heating body, comprising:
a porous ceramic body comprising a preheating member, wherein the preheating member is of a porous infrared ceramic structure; and a heating member located on the porous ceramic body and configured to provide heat for the preheating member and to atomize preheated liquid.

2. The heating body according to claim 1, wherein the porous ceramic body further comprises a substrate, the preheating member is located on the substrate, the substrate is of a porous ceramic structure, and the heating member is completely located in the preheating member and is adjacent to the substrate, or the heating member is located at a junction of the substrate and the preheating member.

3. The heating body according to claim 2, wherein the substrate is of a hollow porous ceramic structure, the preheating member is of a hollow porous infrared ceramic structure, and the substrate and the preheating member are nested with each other.

4. The heating body according to claim 3, wherein the preheating member is sleeved on the substrate, and the heating member is spirally distributed on the substrate.

5. The heating body according to claim 4, wherein the heating member comprises a heating portion and an infrared heating layer located on the heating portion.

6. The heating body according to claim 5, wherein a thickness of the infrared heating layer ranges from 20 gm to 500 gm.

7. The heating body according to claim 3, wherein the substrate is in a shape of a hollow cylinder, the preheating member is in a shape of a hollow cylinder, the preheating member is sleeved on the substrate, an inner diameter of the substrate ranges from 1.5 mm to 3 mm, and an outer diameter of the preheating member ranges from 2.5 mm to 9 mm.

8. The heating body according to claim 2, wherein a surface of the substrate adjacent to Date recue/Date received 2023-05-26 the preheating member is recessed to form a first groove, a surface of the preheating member adjacent to the substrate is recessed to form a second groove corresponding to the first groove, the first groove and the second groove form a heating cavity, and the heating member is accommodated in the heating cavity.

9. The heating body according to any one of claims 1 to 8, wherein a porosity of the preheating member ranges from 30% to 80%.

10. The heating body according to any one of claims 1 to 8, wherein a median pore size of the preheating member ranges from 10 gm to 100 gm.

11. The heating body according to any one of claims 1 to 8, wherein a radiation wavelength of the preheating member ranges from 5 gm to 20 gm.

12. The heating body according to any one of claims 1 to 8, wherein a preheating temperature of the preheating member ranges from 40C to 90C.

13. The heating body according to any one of claims 1 to 8, wherein a resistance value of the heating member ranges from 0.5 S2 to 1.5 S2.

14. The heating body according to any one of claims 2 to 8, wherein a porosity of the substrate ranges from 30% to 80%.

15. The heating body according to any one of claims 2 to 8, wherein a median pore size of the substrate ranges from 10 gm to 100 gm.

16. A method for preparing the heating body according to any one of claims 1 to 15, comprising:
integrally forming, according to a preset shape, the heating member and a raw material configured to prepare the porous ceramic body to prepare a green body; and sintering the green body after degumming to prepare the heating body.

17. An atomizer, comprising:
a liquid storage cavity configured to store liquid; and Date recue/Date received 2023-05-26 the heating body according to any one of claims 1 to 15, the heating body being configured to absorb the liquid in the liquid storage cavity and atomize the liquid.

18. An electronic device, comprising a power supply and the atomizer according to claim 17, wherein the power supply is electrically connected to the atomizer to supply power to the atomizer.

Date recue/Date received 2023-05-26