CN214710375U

CN214710375U - Heating element, atomizer and electronic device

Info

Publication number: CN214710375U
Application number: CN202023278105.3U
Authority: CN
Inventors: 周宏明; 张威; 李日红; 刘望生; 朱彩强
Original assignee: Jiangmen Moore Technology Ltd
Current assignee: Jiangmen Moore Technology Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-16
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to a heat-generating body, atomizer and electron device. The heating body comprises a porous ceramic body and a heating piece, wherein the porous ceramic body has a liquid guiding function and comprises a preheating piece, the preheating piece is of a porous infrared ceramic structure, and the heating piece is located on the porous ceramic body and used for providing heat for the preheating piece and atomizing liquid after preheating. The liquid guiding effect of the heating element is good, and the problems of slow smoke output and dry burning of the heating element during tobacco tar atomization can be solved.

Description

Heating element, atomizer and electronic device

Technical Field

The utility model relates to an atomizer technical field especially relates to a heat-generating body, atomizer and electron device.

Background

The electronic cigarette mainly comprises an atomizer and a battery, wherein the atomizer is an important part of the electronic cigarette and is used for atomizing tobacco tar for smoking. In the atomizer, the heating element is a core component of the atomizer for performing atomization, and is mainly formed by pre-burying a heating wire or a silk-screen heating film on a ceramic substrate. The heater with the embedded heating wire has the advantages of simple structure, high atomization efficiency, uniform temperature field and the like. The heating body of the silk-screen heating film has the advantages of large heating area, realization of surface atomization, high thermal efficiency and the like.

However, when these two types of heating elements atomize tobacco tar, problems such as slow smoke generation, scorched smell and miscellaneous gas generated by dry burning of the heating elements easily occur, and user experience is affected.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a heating element that can improve the problems of slow smoke generation and dry burning of the heating element when atomizing tobacco tar.

A heat-generating body, comprising:

the porous ceramic body has a liquid guide function, and comprises a preheating piece for preheating liquid, wherein the preheating piece is of a porous infrared ceramic structure; and

and the heating part is positioned on the porous ceramic body and used for providing heat for the preheating part and atomizing the preheated liquid.

The heating body takes the porous infrared ceramic structure as a preheating piece, the preheating piece preheats liquid by radiating far infrared rays by utilizing heat provided by the heating piece, the viscosity of the liquid is reduced, and the liquidity of the liquid in the porous ceramic body is improved, so that the liquid to be atomized can more quickly reach the heating piece to be atomized, and the problem that atomized tobacco tar is easy to delay smoke; meanwhile, the liquid to be atomized has improved fluidity in the porous ceramic body, so that the liquid can reach the heating element more quickly, and the problem that the heating element is easy to dry and burn is also solved.

In one embodiment, the porous ceramic body further comprises a base body, the preheating piece is located on the base body, the base body is of a porous ceramic structure, and the heat generating piece is located completely inside the preheating piece and close to the base body or located at the interface of the base body and the preheating piece.

In one embodiment, the substrate is a hollow porous ceramic structure, the preheating piece is a hollow porous infrared ceramic structure, and the substrate and the preheating piece are nested with each other.

In one embodiment, the preheating part is sleeved on the base body, and the heating part is spirally distributed on the base body.

In one embodiment, the heat generating component comprises a heat generating part and an infrared heat generating layer positioned on the heat generating part.

In one embodiment, the thickness of the infrared heating layer is 20-500 μm.

In one embodiment, the base body is in a hollow cylindrical shape, the preheating piece is sleeved on the base body, the inner diameter of the base body is 5 mm-3 mm, and the outer diameter of the preheating piece is 2.5 mm-9 mm.

In one embodiment, a first groove is formed on the surface of the base body close to the preheating piece in a concave mode, a second groove corresponding to the first groove is formed on the surface of the preheating piece close to the base body in a concave mode, a heat generating cavity is formed by the first groove and the second groove, and the heat generating piece is contained in the heat generating cavity.

In one embodiment, the porosity of the preheating part is 30-80%;

and/or the median pore diameter of the preheating piece is 10-100 mu m;

and/or the radiation wavelength of the preheating piece is 5-20 μm;

and/or the preheating temperature of the preheating piece is 40-90 ℃;

and/or the resistance value of the heating element is 0.5-5 omega.

In one embodiment, the porosity of the matrix is 30% to 80%;

and/or the median pore diameter of the matrix is 10-100 mu m.

An atomizer, comprising:

the liquid storage cavity is used for storing liquid; and

the heating element is used for sucking the liquid in the liquid storage cavity and atomizing the liquid, and the heating element is the heating element.

An electronic device comprises a power supply and the atomizer, wherein the power supply is electrically connected with the atomizer to supply power to the atomizer.

Drawings

FIG. 1 is a schematic view of a heat-generating body of an embodiment;

FIG. 2 is an exploded view of the heat-generating body shown in FIG. 1;

FIG. 3 is a sectional view of the heating element shown in FIG. 1.

Reference numerals:

10. a heating element; 110. a porous ceramic body; 120. a heat generating member; 111. a substrate; 112. preheating a part; 113. entering a liquid level; 121. a heat generating portion; 130. a connecting member; 114. a first groove; 115. a second groove.

Detailed Description

To facilitate an understanding of the invention, the invention will be described more fully hereinafter and may be embodied in many different forms and not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. When the terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," and the like are used to indicate an orientation or positional relationship, it is for convenience of description only based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

An embodiment of the utility model provides an atomizer, this atomizer includes stock solution chamber and heat-generating body 10, and the stock solution chamber is used for storing liquid (for example tobacco tar), and heat-generating body 10 is arranged in absorbing the liquid in the stock solution chamber to atomize this liquid. Specifically, the liquid storage cavity has a liquid outlet, and the heating element 10 is close to the liquid outlet. The liquid in the liquid storage cavity flows out of the liquid outlet and then enters the heating body 10, so as to be atomized. Optionally, the nebulizer is an electronic nebulizer. In one particular example, the nebulizer is a nebulizer for an electronic cigarette.

Referring to fig. 1 to 3, the heating element 10 includes a porous ceramic body 110 and a heating element 120 disposed on the porous ceramic body 110, wherein the porous ceramic body 110 includes a base 111 and a preheating element 112 disposed on the base 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 then enters the porous ceramic body 110 from the liquid inlet surface 113.

Specifically, the substrate 111 has a porous ceramic structure and has a liquid-guiding function. Optionally, the substrate 111 is a hollow porous ceramic structure. In the illustrated embodiment, the base 111 has a hollow cylindrical shape. Of course, in other embodiments, the shape of the base 111 is not limited to a hollow cylinder, and may be other hollow structures.

In the present embodiment, the porosity of the matrix 111 is 30% to 80%; the median pore diameter of the substrate 111 is 10 μm to 100 μm. The porosity and pore diameter of the substrate 111 are set as described above, so that the substrate 111 can absorb liquid. In an alternative specific example, the porosity of the matrix 111 is 30%, 40%, 50%, 60%, 70%, or 80%. The median pore diameter of the pores of the substrate 111 is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or 100 μm. Further, the porosity of the substrate 111 is 40% to 70%, and the median pore diameter of pores of the substrate 111 is 10 μm to 80 μm. It is understood that in other embodiments, the porosity and pore size of the substrate 111 are not limited to those described above, and can be adjusted according to actual needs.

The preheating part 112 is close to the liquid outlet, is positioned on the base 111, has a porous infrared ceramic structure, and has the functions of liquid guiding and infrared ray radiation. The preheating part 112 has a liquid inlet surface 113, and after flowing out of the liquid storage cavity, the liquid enters the preheating part 112 through the liquid inlet surface 113 of the preheating part 112, and when flowing through the preheating part 112, the liquid is preheated by infrared rays radiated by the preheating part 112, so that the viscosity is reduced, and the fluidity is improved, thereby preventing the conditions of slow smoke output, dry burning and the like caused by poor fluidity of the tobacco tar in the porous ceramic body 110 when the heating body 10 atomizes the tobacco tar.

Optionally, the preheating part 112 and the base 111 are both hollow structures, and the preheating part 112 is sleeved on the base 111. When the preheating member 112 is sleeved on the base 111, the outer peripheral surface of the preheating member 112 is a liquid inlet surface 113, and the liquid flows out from the liquid storage cavity, enters the preheating member 112 through the outer peripheral surface of the preheating member 112, is preheated by the preheating member 112 and is atomized into smoke after being heated by the heating member 120, and is discharged from the inner peripheral surface of the base 111. It is understood that the preheating member 112 can also be nested in the substrate 111, i.e. the substrate 111 is sleeved on the preheating member 112. At this time, the preheating member 112 is accommodated in the hollow portion of the base 111, the inner peripheral surface of the preheating member 112 is the liquid inlet surface 113, the liquid flows out from the liquid storage chamber, enters the preheating member 112 through the inner peripheral surface of the preheating member 112, is preheated by the preheating member 112, is heated by the heat generating member 120, is atomized into mist, and is discharged from the outer peripheral surface of the base 111.

In the illustrated embodiment, the preheating member 112 has a hollow cylindrical shape. In an alternative embodiment, the base 111 is a hollow cylinder, the preheating part 112 is sleeved on the base 111, the inner diameter of the base 111 is 1.5mm to 3mm, and the outer diameter of the preheating part is 2.5mm to 9 mm. It is understood that the size of the base 111 is not limited to the above, and the size of the preheating member 112 is not limited to the above, and can be adjusted according to the actual situation as long as the shape and size can match with the base 111 and the liquid outlet.

It is understood that in some embodiments, at least one of the substrate 111 and the preheating member 112 may have a non-hollow structure, and the preheating member 112 may also have a non-hollow structure. When the substrate 111 is in a non-hollow structure, the preheating part 112 is in a non-hollow structure, and at this time, the preheating part 112 is located on one side surface of the substrate 111, and the liquid to be atomized is atomized after being preheated by the preheating part 112 and discharged from the other side of the substrate 111. When the base 111 has a hollow structure, the preheating part 112 may have a non-hollow structure, and in this case, the preheating part 112 may be located on the base 111 in a stacked manner.

In this embodiment, the porosity of the preheating part 112 is 30% to 80%; the median pore diameter of the preheating part 112 is 10 μm to 100 μm. The porosity and pore diameter of the preheating part 112 are set as described above, so that the liquid can be easily sucked by the substrate 111. In an alternative specific example, the porosity of the preheat member 112 is 30%, 40%, 50%, 60%, 70%, or 80%. The median pore diameter of the pores of the preheating part 112 is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or 100 μm. Furthermore, the porosity of the preheating part 112 is 40% -70%, and the median pore diameter of the pores of the preheating part 112 is 20-80 μm. It is understood that in other embodiments, the porosity and pore size of the preheating member 112 are not limited to the above, and can be adjusted according to actual needs.

When far infrared rays are irradiated onto an object to be heated, a part of the rays are reflected and a part of the rays are absorbed by the object. When the wavelength of the emitted far infrared ray is consistent with the absorption wavelength of the heated object, the heated object absorbs the far infrared ray, at the moment, molecules and atoms in the object generate 'resonance', strong vibration and rotation are generated, and the vibration and the rotation increase the temperature of the object, thereby achieving the purpose of heating the object. Thus, the wavelength of radiation from the pre-heating member 112 can be selected based on the substance to be heated. Alternatively, the object to be heated is soot, and the radiation wavelength of the preheating member 112 is 5 μm to 20 μm. By setting the radiation wavelength of the preheating part 112 to be 5-20 microns, the effective components (such as essence, glycerol, nicotine and the like) in the tobacco tar can be accurately heated, so that accurate atomization is realized, and the effective atomization concentration of the effective components is improved. Of course, the radiation wavelength of the preheating member 112 is not limited to the above, and may be other radiation wavelengths as long as it can match the absorption wavelength of the object to be heated.

In one embodiment, the pre-heat 112 is an ambient temperature porous infrared ceramic structure. The normal temperature here means 25 ℃ to 150 ℃. In the present embodiment, the preheating temperature of the preheating material 112 is 40 to 90 ℃. The preheating temperature is a temperature that can be reached by the liquid preheated by the preheating member 112. The temperature is suitable for preheating the tobacco tar of the electronic cigarette. Of course, when the liquid to be atomized is not soot but other liquid, the preheating temperature of the preheating member 112 may be adjusted according to the specific need of the atomized liquid.

The heat generating member 120 is used to provide heat to the preheating member 112 and atomize the preheated liquid. A portion of the heat released from the heat generating member 120 directly heats the liquid to be atomized, and another portion of the heat is conducted to the preheating member 112 to absorb the heat and radiate infrared rays.

Specifically, the heat generating member 120 is positioned inside the porous ceramic body 110 for generating heat; in the illustrated embodiment, the heat generating member 120 is located at the interface of the base 111 and the preheating member 112. The heating element 120 is disposed at the junction of the base 111 and the preheating element 112, so that heat generated by the heating element 120 can be fully utilized, and the preheating and atomization requirements are met. Specifically, a first groove 114 is formed by recessing the surface of the base 111 close to the preheating piece 112, a second groove 115 corresponding to the first groove 114 is formed by recessing the surface of the preheating piece 112 close to the base 111, the first groove 114 and the second groove 115 form a heat generating cavity, and the heat generating piece 120 is accommodated in the heat generating cavity.

It is understood that in other embodiments, the heat generating member 120 may be completely embedded in the preheating member 112 or the base 111. For example, the heat generating member 120 is located entirely within the preheating member 112 and away from the liquid outlet; alternatively, the heat generating member 120 is located entirely within the base 111 and adjacent to the preheating member 112.

In the illustrated embodiment, the heat generating member 120 is spirally distributed on the base 111. Of course, in other embodiments, the shape of the heat generating member 120 is not limited to a spiral shape, and may be other shapes. For example, at least one of a sheet, a strip, an S-shape, and a U-shape.

In one embodiment, the heat generating member 120 includes a heat generating portion 121. Optionally, the heat generating portion 121 is a heating wire. In an alternative specific example, the heat generating portion 121 is a heating wire (i.e., a monofilament). In the present embodiment, the resistance of the heat generating member 121 is 0.5 Ω to 1.5 Ω. Further, the resistance of the heat generating member 121 is 0.8 Ω to 1.3 Ω.

In some embodiments, the heat generating member 120 further includes an infrared heat generating layer (not shown) on the heat generating portion 121. By arranging the infrared heating layer on the heating part 121, the heat utilization rate of the heating part 121 is higher, more uniform heat can be received by the preheating part 112, and preheating is faster. Optionally, the thickness of the infrared heating layer is 20 μm to 500 μm. Furthermore, the thickness of the infrared heating layer is 20-80 μm.

In some embodiments, the substrate 111 may be omitted. When the base 111 is omitted, the heat generating member 120 may be located in the preheating member 112 and away from the liquid outlet, so that the liquid is preheated and then atomized. At this time, the heating member 120 transfers heat energy to the preheating member 112 and causes the preheating member 112 to radiate the heat energy to preheat the liquid, and the preheated liquid flows through the heating member 120 to be atomized, thereby releasing the smoke. Of course, when the base 111 is omitted, the heat generating member 120 may be located on the outer surface of the preheating member 112 as long as it can provide heat to the preheating member 112 to preheat the soot and atomize the soot. For example, the preheating part 112 has a non-hollow structure, one side of the preheating part 112 is close to the liquid outlet, and the heat generating part 120 is located on the surface of the preheating part 112 and on the side far from the liquid outlet. At this time, the liquid flowing out of the liquid outlet enters the preheating part 112 at a position close to the liquid outlet, is preheated by the preheating part 112, is atomized by the heating part 120 on the surface of the preheating part 112, and is released. For another example, the preheating part 112 has a hollow structure, and the heat generating part 120 is located on the outer circumferential surface of the preheating part 112. At this time, the liquid flows out from the liquid outlet, enters the preheating member 112 through the inner circumferential surface of the preheating member 112, is preheated by the preheating member 112 and then is heated by the heating member, and thus the mist is released from the outer circumferential surface of the preheating member 112.

In some embodiments, the heat generating member 120 may also be located on the surface of the porous ceramic body 110. For example, when the base 111 is omitted, the heat generating member 120 is located on the outer surface of the preheating member 112.

Of course, the heating element 10 further includes a connecting member 130, and the connecting member 130 is used for electrically connecting the heating element 120 to a power supply. In the illustrated embodiment, the connecting member 130 protrudes from the outer circumferential surface of the preheating member 112.

The heating element 10 includes a porous ceramic body 110 and a heating element 120 on the porous ceramic body 110, and has at least the following advantages:

(1) the heating member 120 provides a portion of heat to heat the preheating member 112 to radiate infrared rays, thereby preheating the tar, and further reducing the viscosity of the tar after entering the porous ceramic body 110, increasing the fluidity, and enabling the tar to flow to the vicinity of the heating member 10 more quickly and to be heated and atomized by the heating member 120 more quickly. Therefore, the heating element 10 is matched with the heating element 120 through the preheating element 112, so that the liquid guiding of the tobacco tar in the porous ceramic body 110 is smooth, the problems of slow smoke generation, dry burning of the heating element 10 and the like are not easy to occur, and the user experience is improved. The verification proves that the heating element 10 has an especially obvious effect on improving the tobacco tar with higher viscosity.

(2) Because infrared heating's radiation wavelength alternative, above-mentioned heat-generating body 10 can be designed to effective component in the tobacco tar to can realize accurate atomizing, improve effective atomization concentration, simultaneously, because it is the infrared ray of specific wavelength and the effective component resonance of tobacco tar and make the tobacco tar heat, the thermal efficiency that heats is higher than single heater, can show the reduction energy consumption.

(3) Because the infrared heating has the heating uniformity, the problems of local overhigh temperature, scorched flavor caused by dry burning of tobacco tar and the like caused by uneven heating circuits can be avoided, and the taste is improved.

The atomizer has the heating element 10, so that the atomizer can quickly discharge smoke, is not easy to dry and burn and saves energy.

Furthermore, an embodiment of the present invention further provides an electronic device, which includes a power source and the above-mentioned atomizer, wherein the power source is electrically connected to the above-mentioned atomizer to supply power to the atomizer. More specifically, the electronic device is an electronic cigarette.

In addition, an embodiment of the present invention provides a method for producing the above heating element, wherein the method comprises steps a to b, specifically:

step a: according to a preset shape, the raw material for preparing the porous ceramic body and the heating piece are molded together to prepare a green body.

Specifically, the raw materials for preparing the porous ceramic body include a raw material for preparing the base body and a raw material for preparing the pre-heating member.

More specifically, the raw materials for preparing the substrate comprise ceramic powder, a sintering aid and a pore-forming agent. Specifically, the types of the ceramic powder, the pore-forming agent and the sintering aid are not particularly limited, and the ceramic powder, the pore-forming agent and the sintering aid commonly used in the art may be used. For example, a diatomaceous earth system or a zeolite system may be used as the ceramic component. The "ceramic powder" refers to a powdery substance obtained by thoroughly and uniformly mixing raw materials (excluding a sintering aid and a pore-forming agent) used in the production of a ceramic and then firing the mixture.

In one embodiment, the raw materials for preparing the substrate comprise, by mass, 40 to 70 parts of ceramic powder, 5 to 30 parts of sintering aid and 10 to 30 parts of pore-forming agent. Further, the raw materials for preparing the substrate comprise, by mass, 45-70 parts of ceramic powder, 10-30 parts of sintering aid and 15-30 parts of pore-forming agent. Of course, in other embodiments, the types and contents of the components of the raw materials for preparing the matrix are not limited to the above, and may be adjusted according to actual conditions.

More specifically, the raw materials for preparing the preheating piece comprise ceramic powder, sintering aid and pore-forming agent, wherein the ceramic powder comprises far infrared ceramic powder. The far infrared ceramic powder refers to ceramic powder with far infrared radiation performance. Optionally, the far infrared ceramic powder comprises far infrared ceramic powder having spinel or inverse spinel type ferrite structure, transition group metal oxide and cordierite system silicic acidAt least one of high-performance infrared ceramic powder prepared by mixing and sintering salt materials. Further, the far infrared ceramic powder having a spinel or inverse spinel type ferrite structure is made of a transition metal oxide (e.g., NiO, Cr)₂O₃、TiO₂、MnO₂、CuO、CoO、Fe₂O₃ZnO, etc.) or inverse spinel type ferrite structure.

In one embodiment, the raw materials for preparing the preheating piece comprise, by mass, 40-80 parts of ceramic powder, 5-30 parts of sintering aid and 10-30 parts of pore-forming agent, wherein the ceramic powder is far infrared ceramic powder. Further, the raw materials for preparing the preheating piece comprise, by mass, 50-80 parts of far infrared ceramic powder, 10-30 parts of sintering aid and 15-30 parts of pore-forming agent, wherein the ceramic powder is far infrared ceramic powder.

In another embodiment, the ceramic powder in the raw materials for preparing the preheating part comprises far infrared ceramic powder and common ceramic powder. That is, the ceramic powder in the raw materials for preparing the preheating part comprises far infrared ceramic powder, common ceramic powder, sintering aid and pore-forming agent. In an optional specific example, the raw materials for preparing the preheating piece comprise, by mass, 40 to 80 parts of ceramic powder, 5 to 30 parts of sintering aid and 10 to 30 parts of pore-forming agent, wherein the ceramic powder comprises far infrared ceramic powder and common ceramic powder. Further, the raw materials for preparing the preheating piece comprise, by mass, 45-70 parts of far infrared ceramic powder, 10-30 parts of sintering aid and 15-30 parts of pore-forming agent, wherein the ceramic powder comprises far infrared ceramic powder and common ceramic powder. Of course, in other embodiments, the types and contents of the components of the raw materials for preparing the pre-heating member are not limited to the above, and may be adjusted according to actual conditions.

In one embodiment, the heat generating component comprises a heat generating part and an infrared heat generating layer positioned on the heat generating part. The material of the heat generating part is not particularly limited, and may be selected according to the resistance value of the heat generating component to be prepared.

The material for preparing the infrared heating layer comprises far infrared ceramic powder, a binder and a solvent. The far infrared ceramic powder can be the same as the far infrared ceramic powder adopted by the preheating piece or different from the far infrared ceramic powder adopted by the preheating piece. The binder is selected from at least one of inorganic binders and organic binders. Specifically, the inorganic binder is selected from at least one of alumina sol and sodium silicate. The organic binder is at least one selected from the group consisting of CMC (hydroxymethyl cellulose), acrylic polymer, PVA (polyvinyl alcohol), and dextrin. Of course, the binder is not limited to the above, and may be other substances that can be used as the binder.

Optionally, the step of preparing the heat generating member having the infrared heat generating layer includes: preparing the material for preparing the infrared heating layer into slurry; and spraying the slurry on the heating wire by adopting a spraying process (such as ion spraying, a spraying gun and the like), and then forming, removing the glue, sintering and preparing heating. It can be understood that the heating element can be prepared by sintering the heating element, then forming, removing glue and sintering the heating element and the raw materials for preparing the porous ceramic body, or the formed heating element (the green body of the heating element) and the raw materials for preparing the porous ceramic body can be formed again, then removing glue and sintering the green body to prepare the heating element.

It should be noted that, the problem of shrinkage matching after sintering the preheating part and the substrate can be solved by adjusting the mass ratio of the sintering aid, the pore-forming agent and the skeleton forming agent.

Alternatively, the forming means in the process of preparing the green body is one of injection molding, gel casting and dry pressing. Of course, the forming method in the process of preparing the green body is not limited to the above, and other methods are also possible.

Step b: and (4) discharging the rubber from the blank, and sintering to obtain the heating element.

Specifically, the glue discharging temperature is 350-700 ℃; the sintering temperature is 800-1200 ℃. Further, the glue discharging temperature is 450-650 ℃; the sintering temperature is 750-1100 ℃. Of course, in other embodiments, the temperature of the debinding and the sintering temperature are not limited to the above, and may be adjusted according to the porous ceramic body to be prepared.

The preparation method of the heating element is simple and convenient, the prepared heating element has the preheating function and the liquid guiding effect is good, and particularly for liquid with higher viscosity, the problems of unsmooth liquid guiding, dry burning of the heating element and the like are not easy to occur. In addition, the preparation method of the heating element is simple and convenient, and is easy for industrial production.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A heat-generating body, characterized by comprising:

the porous ceramic body has a liquid guide function and comprises a preheating piece, and the preheating piece is of a porous infrared ceramic structure; and

2. A heat-generating body as described in claim 1, wherein said porous ceramic body further comprises a base body, said preheating member is provided on said base body, said base body is of a porous ceramic structure, and said heat-generating member is provided entirely inside said preheating member and near said base body or at a boundary between said base body and said preheating member.

3. A heat-generating body as described in claim 2, characterized in that said base is a hollow porous ceramic structure, said preheating member is a hollow porous infrared ceramic structure, and said base and said preheating member are nested with each other.

4. A heat-generating body as described in claim 3, characterized in that said preheating member is provided around said base body, and said heat-generating member is spirally distributed on said base body.

5. A heat-generating body as described in claim 4, characterized in that the heat-generating component comprises a heat-generating portion and an infrared heat-generating layer on the heat-generating portion.

6. A heat-generating body as described in claim 5, characterized in that the thickness of the infrared heat-generating layer is 20 μm to 500 μm.

7. A heat-generating body as described in claim 3, characterized in that said base body is in the shape of a hollow cylinder, said preheating member is fitted over said base body, the inner diameter of said base body is 1.5mm to 3mm, and the outer diameter of said preheating member is 2.5mm to 9 mm.

8. A heat-generating body as described in claim 2, wherein a first groove is formed by recessing the surface of said base body close to said preheating member, a second groove corresponding to said first groove is formed by recessing the surface of said preheating member close to said base body, said first groove and said second groove form a heat-generating chamber, and said heat-generating member is housed in said heat-generating chamber.

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

and/or the median pore diameter of the preheating piece is 10-100 mu m;

and/or the radiation wavelength of the preheating piece is 5-20 μm;

and/or the preheating temperature of the preheating piece is 40-90 ℃;

and/or the resistance value of the heating element is 0.5-1.5 omega.

10. The heating element as claimed in any one of claims 2 to 8, wherein the porosity of the base is 30% to 80%;

and/or the median pore diameter of the matrix is 10-100 mu m.

11. An atomizer, comprising:

the liquid storage cavity is used for storing liquid; and

a heating element for sucking the liquid in the liquid storage cavity and atomizing the liquid, wherein the heating element is the heating element according to any one of claims 1 to 10.

12. An electronic device comprising a power source and the nebulizer of claim 11, the power source being electrically connected to the nebulizer to power the nebulizer.