CN214431825U

CN214431825U - Ceramic heating element, atomizer and electronic atomization device

Info

Publication number: CN214431825U
Application number: CN202022683810.5U
Authority: CN
Inventors: 张钊; 罗洪梁; 肖从文
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-10-22
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a ceramic heating element, an atomizer and an electronic atomization device, wherein the ceramic heating element comprises a ceramic substrate and a heating layer; the heating layer is attached to the surface of the ceramic substrate; wherein, the surface of the ceramic substrate, which is in contact with the heating layer, is provided with a plurality of microgrooves; in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the opening size of the micro groove, the binding force between the heating layer and the ceramic in the ceramic heating body is enhanced, the heating layer and the ceramic contact surface are prevented from cracking to the maximum extent, the heating layer is prevented from falling off, and the service life of the ceramic heating body is prolonged.

Description

Ceramic heating element, atomizer and electronic atomization device

Technical Field

The utility model relates to an atomizer technical field specifically is a ceramic heat-generating body, atomizer and electronic atomization device.

Background

The ceramic heating element has the advantages of corrosion resistance, high temperature resistance, long service life, good heat conducting property and the like, and is widely applied to the technical field of electronic atomization. The ceramic heating element mainly comprises two components of a ceramic substrate and a metal heating film, wherein the heating film is directly printed on a ceramic blank in an electronic paste form, and the ceramic heating element is obtained through processes of high-temperature baking, electrode and lead wire treatment and the like.

However, the ceramic substrate and the metal heating film have poor bonding strength due to large difference of pore distribution uniformity on the ceramic surface, and the heating film is easy to fall off and crack in the high-temperature atomization application process, thereby seriously affecting the service life of the ceramic heating element.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a pottery heat-generating body, atomizer and electronic atomization device to solve the relatively poor technical problem of bonding strength between ceramic base member and the metal heating film among the prior art.

In order to solve the above technical problem, the utility model provides a first technical scheme is: provided is a ceramic heat-generating body including: a ceramic base and a heating layer; the heating layer is attached to the surface of the ceramic substrate; wherein the surface of the ceramic substrate, which is in contact with the heating layer, is provided with a plurality of microgrooves; in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the size of the opening of the micro groove; the heating layer is at least partially filled in the micro-grooves to form fixing parts, and the maximum size of the cross section of each fixing part is larger than the size of the opening of each micro-groove in the direction parallel to the surface of the ceramic substrate.

Wherein the cross-sectional shape of the micro-groove in the direction perpendicular to the surface of the ceramic substrate is an arc or a trapezoid.

The micro grooves comprise a first sub micro groove and a second sub micro groove, and the first sub micro groove is positioned at one end, far away from the heating layer, of the second sub micro groove; the cross section of the first sub-micro groove in the direction perpendicular to the surface of the ceramic substrate is an arc, and the second sub-micro groove is a columnar through hole.

And the adjacent micro grooves are communicated through a connecting hole, and the fixing part is partially filled in the connecting hole.

Wherein the size of the microgrooves is 10-100 microns.

In order to solve the technical problem, the utility model provides a second technical scheme is: provided is a ceramic heat-generating body including: the heating device comprises a porous ceramic base, a ceramic covering layer and a heating layer, wherein a plurality of first micropores are formed in the surface of the porous ceramic base; the ceramic covering layer is arranged on the surface of the porous ceramic matrix and is attached to the porous ceramic matrix; the ceramic covering layer is provided with a plurality of second micropores which are through holes; the heating layer is arranged on the surface of the ceramic covering layer far away from the porous ceramic base body;

wherein one of the first micro-holes is communicated with one of the second micro-holes to form a groove; in a direction parallel to the surface of the porous ceramic base, the maximum dimension of the cross section of the groove is larger than the opening dimension of the groove; the heating layer is at least partially filled in the groove to form a fixing part, and the maximum size of the cross section of the fixing part is larger than the size of the opening of the groove in the direction parallel to the surface of the porous ceramic substrate.

Wherein the cross-sectional shape of the groove in a direction perpendicular to the surface of the porous ceramic base is an arc of major arc.

The cross section of the groove in the direction perpendicular to the surface of the porous ceramic base body is trapezoidal, and the shorter bottom edge of the trapezoid is positioned on one side far away from the porous ceramic base body.

The second micropores comprise first sub-micropores and second sub-micropores, and the second sub-micropores are arranged at one end, far away from the porous ceramic matrix, of the first sub-micropores; the size of the first sub-micropores is gradually reduced at least in a section in the direction away from the porous ceramic matrix; the shape and size of the second sub-micropores are not changed in a direction away from the porous ceramic base.

The cross section of the first micropores in the direction perpendicular to the surface of the porous ceramic base body is a minor arc, the first micropores and the first sub-micropores are matched to form sub-grooves, the cross section of the sub-grooves in the direction perpendicular to the surface of the porous ceramic base body is a major arc, and the second sub-micropores are columnar through holes.

And adjacent grooves are communicated through a connecting hole, and the fixing part is partially filled in the connecting hole.

Wherein, the size of the first micropore is 10-100 microns, and the size of the second micropore is 10-100 microns.

In order to solve the above technical problem, the utility model provides a third technical scheme does: provided is a ceramic heat-generating body including: the heating device comprises a porous ceramic base, a ceramic covering layer and a heating layer, wherein a plurality of first micropores are formed in the surface of the porous ceramic base; the ceramic covering layer is arranged on the surface of the porous ceramic matrix and is attached to the porous ceramic matrix; the ceramic covering layer is provided with a plurality of second micropores which are through holes; the heating layer is arranged on the surface of the ceramic covering layer far away from the porous ceramic base body;

wherein, a first micropore is communicated with a second micropore to form a groove; and the adjacent grooves are communicated through connecting holes, and the connecting holes are filled with parts of the heating layers.

In order to solve the above technical problem, the utility model provides a fourth technical scheme is: the atomizer comprises a ceramic heating body, wherein the ceramic heating body is any one of the ceramic heating bodies.

In order to solve the above technical problem, the utility model provides a fifth technical scheme is: an electronic atomizer is provided, which comprises an atomizer and a main body, wherein the atomizer is the atomizer.

The utility model has the advantages that: be different from prior art, ceramic heat-generating body includes the ceramic base member and generates heat the layer in this application, and the layer laminating that generates heat sets up in the surface of ceramic base member. The surface of the ceramic substrate, which is in contact with the heating layer, is provided with a plurality of microgrooves; in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the opening size of the micro groove, the binding force between the heating layer and the ceramic in the ceramic heating body is enhanced, the heating layer and the ceramic contact surface are prevented from cracking to the maximum extent, the heating layer is prevented from falling off, and the service life of the ceramic heating body is prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic atomization device provided by the present invention;

fig. 2 is a schematic structural diagram of an atomizer provided by the present invention;

FIG. 3 is a schematic cross-sectional view of a first embodiment of a ceramic heating element according to the present invention;

FIG. 4 is a schematic cross-sectional view of a second embodiment of a ceramic heating element according to the present invention;

FIG. 5 is a schematic cross-sectional view of a third embodiment of a ceramic heating element according to the present invention;

FIG. 6 is a schematic cross-sectional view of a fourth embodiment of a ceramic heating element according to the present invention;

FIG. 7 is a schematic cross-sectional view of a fifth embodiment of a ceramic heating element according to the present invention;

FIG. 8 is a schematic cross-sectional view of a sixth embodiment of a ceramic heating element according to the present invention;

FIG. 9 is a schematic flow chart of a method for producing a ceramic heating element according to the present invention;

FIG. 10 is a schematic structural view of step S01 in an embodiment of the method for producing a ceramic heating element according to the present invention;

FIG. 11 is a schematic structural view of step S02 in an embodiment of the method for producing a ceramic heating element according to the present invention;

FIG. 12 is a schematic structural view of step S03 in an embodiment of the method for producing a ceramic heating element according to the present invention;

FIG. 13 is a schematic structural view of step S04 in an embodiment of the method for producing a ceramic heating element according to the present invention;

fig. 14 is a schematic structural view of step S05 in an embodiment of the method for manufacturing a ceramic heating element according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only some but not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

The terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. All directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. The terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Please refer to fig. 1, which is a schematic structural diagram of an electronic atomizer according to the present invention.

The electronic atomization device can be used for atomizing liquid substrates such as tobacco juice, liquid medicine and the like. The electronic atomizer device includes an atomizer 1 and a main body 2 connected to each other. The atomizer 1 is used for storing a liquid substrate and atomizing the liquid substrate to form an aerosol for a user to inhale; the nebulizer 1 is particularly useful in different fields, such as medical treatment, electronic cigarettes, etc. The main body 2 comprises a battery and an airflow sensor; the battery is used to power the atomiser 1 so that the atomiser 1 can atomise a liquid substrate to form an aerosol; the airflow sensor is used for detecting airflow change in the electronic atomization device so as to start the electronic atomization device. The atomizer 1 and the main body 2 can be integrally arranged or detachably connected and designed according to specific requirements.

Please refer to fig. 2, which is a schematic structural diagram of an atomizer according to the present invention.

The atomizer 1 comprises a shell 10 and an atomizer 11, wherein the atomizer 11 comprises an atomizing base 111 and a ceramic heating body 20; the atomizing base 111 is provided on the case 10, and the ceramic heating element 20 is attached to the atomizing base 111. The atomizer 1 is particularly useful for atomizing liquids and generating smoke for different fields, such as medical, electronic cigarettes, etc.; in one embodiment, the atomizer 1 may be used in an electronic cigarette atomizing device for atomizing tobacco tar and generating smoke for a smoker to inhale, as exemplified in the following embodiments; of course, in other embodiments, the atomizer 1 can also be applied to a hair spray apparatus for atomizing hair spray for hair styling; or applied to medical equipment for treating upper and lower respiratory diseases to atomize medical drugs.

One end of the housing 10 forms a mouthpiece section 12. An air outlet channel 13 and a liquid storage bin 14 are further arranged in the shell 10, the liquid storage bin 14 is arranged around the air outlet channel 13, and the air outlet channel 13 is communicated with the mouthpiece part 12. The liquid storage bin 14 is used for storing liquid, the liquid storage bin 14 can be made of metal such as aluminum, stainless steel and the like, can also be made of plastic, and only needs to be capable of storing liquid to be atomized without reacting with the liquid to cause the liquid to deteriorate; the shape and size of the liquid storage bin 14 are not limited and can be designed as required.

The atomizing base 111 is located on a side of the reservoir 14 remote from the mouthpiece portion 12. Specifically, the housing 10 forms a receiving groove on a side of the reservoir 14 away from the mouthpiece portion 12, and the atomizing base 111 is disposed in the receiving groove. The atomizing base 111 includes an atomizing top base 113 and an atomizing base 114. The atomizing top mount 113 and the atomizing base mount 114 may be connected by a snap-fit structure. For example, a protrusion may be provided on the atomizing top base 113, and a slot may be provided on the atomizing base 114; or a protrusion is arranged on the atomizing base 114, and a clamping groove is arranged on the atomizing top base 113. The atomizing base 111 can be made of ceramic, stainless steel or other alloys, and only needs to play a supporting role; the shape and size of the atomizing base 111 are not limited and can be designed as desired.

An atomization cavity 115 is formed between the atomization top seat 113 and the atomization base seat 114, and specifically, an atomization cavity 115 is formed between the atomization surface of the ceramic heating element 20 and the atomization base seat 114. The atomization chamber 115 communicates with the air outlet passage 13. The two ends of the ceramic heating element 20 are connected with the atomizing base 111, and the middle part of the ceramic heating element 20 is suspended in the atomizing cavity 115. The ceramic heating element 20 is at least partially accommodated in the atomizing top base 113, and the atomizing top base 113 is disposed between the liquid storage bin 14 and the ceramic heating element 20. The atomizing top seat 113 is provided with a first lower liquid channel 116 and a second lower liquid channel 117; one end of the first lower liquid channel 116 and the second lower liquid channel 117 is communicated with the liquid storage bin 14, and the other end is connected with the ceramic heating element 20, so that the tobacco tar in the liquid storage bin 14 is guided to the ceramic heating element 20 through the first lower liquid channel 116 and the second lower liquid channel 117. The atomizing base 114 is provided with an air inlet passage 118, and the air inlet passage 118 is communicated with the atomizing cavity 115, so that the air inlet passage 118 is communicated with the outside and the atomizing cavity 115. The air inlet channel 118, the atomizing chamber 115 and the air outlet channel 13 form an air flow channel of the atomizer 1.

The ceramic heating element 20 includes a heating element and a porous member. The liquid in the liquid storage bin 14 enters the ceramic heating element 20 through the first lower liquid channel 116 and the second lower liquid channel 117, and the liquid is atomized. In this embodiment, the ceramic heating element 20 is selected for atomization; in other embodiments, the cotton core heating element can be selected for atomization.

When a user uses the electronic atomization device to suck in the suction nozzle part 12, the outside air enters the atomization cavity 115 through the air inlet channel 118 on the atomization base 114, the atomized smoke carrying the ceramic heating element 20 in the atomization cavity 115 enters the air outlet channel 13, and the smoke reaches the suction nozzle part 12 and is sucked by the user.

Fig. 3 is a schematic cross-sectional view of a ceramic heater according to a first embodiment of the present invention.

The ceramic heating element 20 includes a porous ceramic base 21, a ceramic cover layer 22, and a heat generating layer 23. The ceramic cover layer 22 is provided on the surface of the porous ceramic body 21 and is attached to the porous ceramic body 21. The heat generating layer 23 is disposed on the surface of the ceramic cover layer 22 away from the porous ceramic base 21, and is attached to the ceramic cover layer 22 and the porous ceramic base 21.

Because the material of porous ceramic base member 21 is porous ceramic, has a plurality of capillary holes on its porous ceramic base member 21, utilizes capillary force to lead the liquid that stock solution storehouse 14 flowed into ceramic heat-generating body 20 to the atomizing face, is provided with the layer 23 that generates heat on the atomizing face, and the layer 23 that generates heat will wait to atomize the liquid and heat and atomize into smog. The surface of the porous ceramic matrix 21 prepared in the prior art has a plurality of capillary pores, and the cross-sectional shapes of the plurality of capillary pores in the direction perpendicular to the surface of the porous ceramic matrix 21 are different and mainly consist of minor arcs. That is, the proportion of the minor arc-shaped capillary pores on the surface of the porous ceramic substrate 21 is at least more than 50%.

In this embodiment, capillary pores on the surface of the porous ceramic base 21, the cross-sectional shape of which in the direction perpendicular to the surface of the porous ceramic base 21 is a minor arc, are collectively referred to as first micropores 211; that is, the surface of the porous ceramic base 21 has a plurality of first micropores 211, and the cross-sectional shape of the first micropores 211 in the direction perpendicular to the surface of the porous ceramic base 21 is a minor arc; the first micropores 211 account for at least more than 50% of the pores on the surface of the porous ceramic matrix 21.

The ceramic covering layer 22 is provided with a plurality of second micropores 221, and the second micropores 221 are through holes; at least one section of the second micropores 221 is tapered in a direction away from the porous ceramic base 21, thereby forming a necking. That is, the size of the second micropores 221 is gradually increased and then gradually decreased in a direction away from the porous ceramic base 21. Specifically, the first micro-holes 211 are arranged corresponding to the second micro-holes 221, one first micro-hole 211 is arranged corresponding to one second micro-hole 221, and one first micro-hole 211 is communicated with one second micro-hole 221 to form the groove 24; the porous ceramic base 21 and the ceramic cover 22 cooperate to form a plurality of recesses 24, and the plurality of recesses 24 are independent of each other. It is understood that the first micro holes 211 and the second micro holes 221 are arranged in a one-to-one correspondence in the present disclosure, and it is not required that all the first micro holes 211 and all the second micro holes 221 are arranged in a one-to-one correspondence. As long as there are a plurality of first micro holes 211 and a plurality of second micro holes 221 arranged in one-to-one correspondence. Due to the process operation, the number of the first micro holes 211 is greater than that of the second micro holes 221, and the second micro holes 221 are not correspondingly formed in each first micro hole 211, but the second micro holes 221 are always arranged in one-to-one correspondence with the first micro holes 211. Preferably, the ratio of the grooves 24 formed by the first micropores 211 and the second micropores 221 in the surface of the porous ceramic substrate 21 on which the ceramic cover layer 22 is disposed is at least greater than 50%. More preferably, such grooves 24 represent at least more than 80% of the capillary pores of the surface of the porous ceramic matrix 21 on which the ceramic overlayer 22 is provided.

Because the second micro-hole 221 is a through-hole, the first micro-hole 211 and the second micro-hole 221 cooperate to form a groove 24, and one end of the second micro-hole 221 away from the porous ceramic substrate 21 is an opening of the groove 24; i.e., the recess 24 opens toward the heat generating layer 23. In the direction parallel to the surface of the porous ceramic base 21, the maximum dimension of the cross section of the groove 24 is larger than the opening dimension of the groove 24, so as to enhance the bonding force between the heat generating layer 23 and the ceramic in the ceramic heating element 20, prevent the cracking of the contact surface between the heat generating layer 23 and the ceramic to the maximum extent, and further prevent the heat generating layer 23 from falling off from the porous ceramic base 21 after the cracking of the contact surface between the heat generating layer 23 and the ceramic, thereby prolonging the service life of the ceramic heating element 20. When the surface of the porous ceramic base 21 in contact with the heat generating layer 23 is a plane, the direction parallel to the surface of the porous ceramic base 21 is a horizontal direction; when the surface of the porous ceramic base 21 in contact with the heat generating layer 23 is a curved surface, the direction parallel to the surface of the porous ceramic base 21 has the same curvature as the surface of the porous ceramic base 21.

The heat generating layer 23 includes a heat generating layer body 231 and a fixing portion 232. The heat generation layer body 231 covers the ceramic cover layer 22. The heating layer 23 is at least partially filled in the groove 24 to form a fixing part 232, and the maximum size of the cross section of the fixing part 232 is larger than the opening size of the groove 24 in the direction parallel to the surface of the porous ceramic substrate 21, so that the bonding force between the heating layer 23 and the ceramic is enhanced, the heating layer 23 can be prevented from falling off, and the service life of the ceramic heating body 20 is prolonged.

The heating layer 23 may be a heating film, a heating wire, a heating net, a heating circuit, or other elements capable of heating and atomizing, and is designed according to the needs, which is not limited in the present application.

In the present embodiment, the cross-sectional shape of the groove 24 in the direction perpendicular to the surface of the porous ceramic base 21 is a major arc. The ratio of the major arc-shaped grooves 24 in the pores of the porous ceramic substrate 21 on the surface where the ceramic cover layer 22 is disposed is greater than 90%. The fixing portions 232 of the heat generating layer 23 fill the corresponding grooves 24. That is, the cross-sectional shape of the fixing portion 232 in the direction perpendicular to the surface of the porous ceramic base 21 is also a major arc.

Fig. 4 is a schematic cross-sectional view of a second embodiment of the ceramic heater according to the present invention.

In the second embodiment, the structure of the ceramic heat-generating body 20 is substantially the same as that of the ceramic heat-generating body 20 in the first embodiment except for the sectional shape of the grooves 24 in the direction perpendicular to the surface of the porous ceramic base body 21.

In the present embodiment, the surface of the porous ceramic base 21 has a plurality of first micropores 211, and the cross-sectional shape of the first micropores 211 in the direction perpendicular to the surface of the porous ceramic base 21 is a minor arc.

The second micro-hole 221 includes a first sub-micro-hole 2211 and a second sub-micro-hole 2212. The second sub-microhole 2212 is arranged at one end of the first sub-microhole 2211 far away from the porous ceramic base 21; the size of the first sub-micropores 2211 gradually increases and then gradually decreases in a direction away from the porous ceramic base 21; the shape and size of the second sub-micropores 2212 are not changed in a direction away from the porous ceramic base 21.

The size of the first sub-micropores 2211 near one end of the porous ceramic base 21 is the same as the size of the first micropores 211 near one end of the ceramic cover layer 22, and the size of the first sub-micropores 2211 far away from one end of the porous ceramic base 21 is smaller than the maximum size of the section of the first sub-micropores 2211 parallel to the surface of the porous ceramic base 21; the second sub-micro-holes 2212 have the same size in section parallel to the surface of the porous ceramic base 21. That is, the first micropores 211 and the first sub-micropores 2211 cooperate to form a sub-groove, the cross-sectional shape of the sub-groove in the direction perpendicular to the surface of the porous ceramic base 21 is a major arc, and the second sub-micropores 2212 are columnar through holes.

Through setting up second sub-micropore 2212, increase the degree of depth that generates heat layer 23 embedding ceramic blanket 22, improve the cohesion of generating heat layer 23 and pottery, further prevent that the layer 23 that generates heat from droing from the pottery, and then prolong ceramic heating body 20's life.

Fig. 5 is a schematic cross-sectional view of a ceramic heating element according to a third embodiment of the present invention.

In the third embodiment, the structure of the ceramic heat-generating body 20 is substantially the same as that of the ceramic heat-generating body 20 in the second embodiment except for the connection relationship between the plurality of grooves 24.

Because one first micropore 211 is correspondingly provided with one second micropore 221, one first micropore 211 is communicated with one second micropore 221 to form the groove 24; the porous ceramic substrate 21 and the ceramic capping layer 22 cooperate to form a plurality of recesses 24. In the present embodiment, the adjacent grooves 24 are communicated with each other through the connection hole 241, and the connection hole 241 is filled with the partial heat generating layer 23. Wherein the connection hole 241 is provided on the ceramic cover layer 22, and the size of the connection hole 241 is smaller than the thickness of the ceramic cover layer 22.

In this embodiment, the first micropores 211 and the first sub-micropores 2211 form a sub-groove, and the cross-sectional shape of the sub-groove in the direction perpendicular to the surface of the porous ceramic base 21 is an arc. The porous ceramic base 21 has a plurality of first micro holes 211, the ceramic cover 22 has a plurality of first sub micro holes 2211, the plurality of first micro holes 211 and the plurality of first sub micro holes 2211 cooperate to form a plurality of sub grooves, and the plurality of sub grooves are communicated through the connecting hole 241.

The plurality of sub-grooves are communicated through the connecting holes 241, and the connecting holes 241 are filled with part of the heating layer 23, so that the fixing part 232 is connected in the ceramic into a whole, the ceramic covering layer 22 can prevent the heating layer 23 from falling off, and the service life of the ceramic heating body 20 is prolonged.

Fig. 6 is a schematic cross-sectional view of a ceramic heating element according to a fourth embodiment of the present invention.

In the fourth embodiment, the structure of the ceramic heat-generating body 20 is substantially the same as that of the ceramic heat-generating body 20 in the first embodiment except for the sectional shape of the first micropores 211 in the direction perpendicular to the surface of the porous ceramic base 21 and the sectional shape of the grooves 24 in the direction perpendicular to the surface of the porous ceramic base 21.

In the present embodiment, the cross-sectional shape of the first micropores 211 in the direction perpendicular to the surface of the porous ceramic base 21 is a first trapezoid. The cross-sectional shape of the groove 24 formed by the first micropores 211 and the second micropores 221 in a matching manner in a direction perpendicular to the surface of the porous ceramic base 21 is a second trapezoid, and the shorter base of the second trapezoid is located on the side away from the porous ceramic base 21.

In other embodiments, the opening size of the groove 24 may be smaller than the maximum cross-sectional size of the groove 24 in a direction parallel to the surface of the porous ceramic base 21, and the cross-sectional shape of the groove 24 in a direction perpendicular to the surface of the porous ceramic base 21 is not limited.

It is understood that the cross-sectional shape of the groove 24 in the direction perpendicular to the surface of the porous ceramic substrate 21 may be other than trapezoidal as long as it has a necking structure.

Fig. 7 is a schematic cross-sectional view of a fifth embodiment of the ceramic heater according to the present invention.

In the fifth embodiment, the structure of the ceramic heat-generating body 20 is substantially the same as that of the ceramic heat-generating body 20 in the first embodiment except for the positional relationship between the sectional shape of the second micropores 221 in the direction perpendicular to the surface of the porous ceramic base 21 and the plurality of grooves 24.

In the present embodiment, the second micropores 221 have the same cross-sectional size parallel to the surface of the porous ceramic base 21, i.e., the second micropores 221 have a columnar shape. The adjacent grooves 24 are communicated through a connecting hole 241, and the heating layer 23 is filled in the connecting hole 241. Wherein the connection hole 241 is provided on the ceramic cover layer 22, and the size of the connection hole 241 is smaller than the thickness of the ceramic cover layer 22. In other embodiments, the connection hole 241 may be partially disposed on the ceramic capping layer and partially disposed on the porous ceramic substrate 21, and the preparation process is changed accordingly.

The fixing portion 232 is integrated in the ceramic by communicating the plurality of grooves 24 through the connection hole 241, and the connection hole 241 is filled with a part of the heat generating layer 23. And the part of the ceramic covering layer 22 without the second micropores 221 can prevent the heat-generating layer 23 from falling off, thereby prolonging the service life of the ceramic heating body 20.

Fig. 8 is a schematic cross-sectional view of a sixth embodiment of the ceramic heater according to the present invention.

In the sixth embodiment, the structure of the ceramic heat-generating body 20 is substantially the same as that of the ceramic heat-generating body 20 in the fifth embodiment except for the sectional shape of the first micropores 221 in the direction perpendicular to the surface of the porous ceramic base body 21.

In the present embodiment, the cross-sectional shape of the first micropores 211 perpendicular to the surface of the porous ceramic base 21 is rectangular, that is, the cross-sectional dimensions of the first micropores 211 parallel to the surface of the porous ceramic base 21 are the same; the second micropores 221 have the same cross-sectional size parallel to the surface of the porous ceramic base 21, i.e., the second micropores 221 are columnar. The adjacent grooves 24 are communicated through a connecting hole 241, and the connecting hole 241 is filled with a part of the heating layer 23. Wherein the connection hole 241 is provided on the ceramic cover layer 22, and the size of the connection hole 241 is smaller than the thickness of the ceramic cover layer 22. In other embodiments, the connection hole 241 may be partially disposed on the ceramic capping layer and partially disposed on the porous ceramic substrate 21, and the preparation process is changed accordingly.

The fixing portion 232 is integrated in the ceramic by communicating the plurality of grooves 24 through the connection hole 241, and the connection hole 241 is filled with a part of the heat generating layer 23. And the ceramic covering layer 22 can prevent the heating layer 23 from falling off, thereby prolonging the service life of the ceramic heating body 20.

In the first, second, third, fourth and fifth embodiments, the size of the first micro-holes 211 is 10 to 100 micrometers, and the size of the second micro-holes 221 is 10 to 100 micrometers; the ceramic covering layer 22 is made of porous ceramic or dense ceramic, and the ceramic covering layer 22 can strengthen the binding force between the heating layer 23 and the ceramic, and can be selected according to requirements.

The shapes of the porous ceramic base 21 and the ceramic cover layer 22 may be other shapes such as a circular ring shape and a rectangular parallelepiped shape, and are selected as necessary. Since the porous ceramic substrate 21 and the ceramic cover layer 22 are both made of ceramic materials, the bonding force is strong. Preferably, the porous ceramic substrate 21 and the ceramic capping layer 22 are the same ceramic material.

Please refer to fig. 9-14, fig. 9 is a schematic flow diagram of a method for preparing a ceramic heating element according to the present invention, fig. 10 is a schematic structural diagram of step S01 in an embodiment of a method for preparing a ceramic heating element according to the present invention, fig. 11 is a schematic structural diagram of step S02 in an embodiment of a method for preparing a ceramic heating element according to the present invention, fig. 12 is a schematic structural diagram of step S03 in an embodiment of a method for preparing a ceramic heating element according to the present invention, fig. 13 is a schematic structural diagram of step S04 in an embodiment of a method for preparing a ceramic heating element according to the present invention, and fig. 14 is a schematic structural diagram of step S05 in an embodiment of a method for preparing a ceramic heating element according to the present invention.

S01: a porous ceramic matrix is provided.

Specifically, a porous ceramic base 21 is provided, and a surface of the porous ceramic base 21 has a plurality of first micropores 211. In an embodiment, the porous ceramic matrix 21 is prepared by the prior art, and the cross-sectional shapes of the multiple capillary pores on the surface of the prepared porous ceramic matrix 21 in the direction perpendicular to the surface of the porous ceramic matrix 21 are different, and are mainly minor arcs. I.e., the proportion of inferior arc capillaries is at least greater than 50%. The minor arc is collectively referred to as a first microhole 211.

S02: a plurality of fillers are provided on the surface of the porous ceramic base.

Specifically, a plurality of fillers 212 are disposed on the surface of the porous ceramic base 21, and each filler 212 is partially received in one of the first pores 211 on the surface of the porous ceramic base 21. The material of the filler 212 is one or more of polymer, metal, and single crystal silicon. The shape of the filler 212 is spherical or other shape, designed according to specific needs.

In one embodiment, the filler 212 is made of polymer, and the filler 212 is spherical. The filler 212 is sprinkled on the surface of the porous ceramic substrate 21, and the filler 212 is placed in the first micro via 211 by micro-vibration, wherein the first micro via 211 accommodates a part of the filler 212. The micro-vibration may be a slight shake of the porous ceramic base 21 by an operator, or a micro-vibration of the porous ceramic base 21 by a machine, and only needs to be able to fill the filler 212 into the first micropores 211. The filler 212 includes a plurality of individual balls, wherein a portion of the balls is filled into the first micro holes 211, and the balls not filled into the first micro holes 211 are scraped off so as not to affect the subsequent process.

S03: and arranging a ceramic covering layer on the surface of the porous ceramic substrate provided with the filler, so that the ceramic covering layer forms a plurality of second micropores, and the second micropores are through holes.

Specifically, the ceramic cover layer 22 is provided on the surface of the porous ceramic body 21 on which the filler 212 is provided, so that a plurality of second pores 221 are formed in the ceramic cover layer 22, and the second pores 221 are through holes. The filler 212 is partially disposed within the second micro hole 221 and exposed from the second micro hole 221.

The ceramic cover 22 is disposed on the surface of the porous ceramic base 21 by casting. Thermosetting resin, thermoplastic resin, plasticizer and friction reducer are added to the ceramic powder to make the ceramic powder have viscosity, and the ceramic powder is sprayed on the surface of the porous ceramic matrix 21 to form the ceramic covering layer 22. The ceramic cover layer 22 and the porous ceramic base body 21 are fixed by the adhesion of the ceramic powder.

In an embodiment, the ceramic covering layer 22 is disposed on the surface of the porous ceramic substrate 21 by casting, and the second micro-holes 221 are formed on the ceramic covering layer 22 after fixing.

S04: and removing the filler on the porous ceramic matrix.

Specifically, the method of removing the filler 212 on the porous ceramic substrate 21 includes one or more of sintering, ion impact, and chemical treatment, which is selected according to the specific material of the filler 212.

In an embodiment, the filler 212 is removed by sintering, resulting in the groove 24 (the first micro hole 211 is formed in cooperation with the second micro hole 221).

S05: and arranging the heating layer on the surface of the ceramic covering layer far away from the porous ceramic substrate to obtain the ceramic heating body.

In one embodiment, the heat generating layer 23 is disposed on the surface of the ceramic cover layer 22 away from the porous ceramic substrate 21, and a part of the heat generating layer 23 is filled in the recess 24, resulting in a ceramic heat generating body.

The ceramic heat-generating body 20 in the first, second, third, fourth and fifth embodiments of the present invention can be obtained by the above-described production method. In the ceramic heating element 20 thus produced, the porous ceramic base 21 and the ceramic coating layer 22 do not have a distinct boundary, and the boundary between the porous ceramic base 21 and the ceramic coating layer 22 cannot be visually recognized with the naked eye, and the boundary between the porous ceramic base 21 and the ceramic coating layer 22 needs to be recognized with the aid of a highly accurate instrument. That is, the prepared porous ceramic substrate 21 and the ceramic cover layer 22 are integrated.

The integral structure formed by the porous ceramic base 21 and the ceramic cover layer 22 is referred to as a ceramic base, that is, the ceramic heater includes a ceramic base and a heat-generating layer 23, and the heat-generating layer 23 is attached to the surface of the ceramic base. The porous ceramic base 21 and the ceramic cover layer 22 are matched to form a groove 24, so that the surface of the ceramic base, which is in contact with the heating layer 23, is provided with a plurality of microgrooves (the functions of the microgrooves are the same as those of the groove 24); in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the opening size of the micro groove; the heat generating layer 23 is at least partially filled in the micro grooves to form fixing parts 232, and the maximum size of the cross section of the fixing parts 232 is larger than the opening size of the micro grooves in the direction parallel to the surface of the ceramic substrate. Specifically, the size of the microgrooves is 10-100 microns; the adjacent micro grooves can be communicated through a connecting hole 241, and the fixing part 232 is partially filled in the connecting hole 241; the cross-sectional shape of the micro-groove in the direction perpendicular to the surface of the ceramic substrate may be a major arc, a trapezoid or other shapes, and the cross-sectional shape of the micro-groove may be any one of the cross-sectional shapes of the groove 24, which is not described in detail.

Ceramic heating body includes the ceramic base member and generates heat the layer in this application, and the layer laminating that generates heat sets up in the surface of ceramic base member. The surface of the ceramic substrate, which is in contact with the heating layer, is provided with a plurality of microgrooves; in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the opening size of the micro groove, the binding force between the heating layer and the ceramic in the ceramic heating body is enhanced, the heating layer and the ceramic contact surface are prevented from cracking to the maximum extent, the heating layer is prevented from falling off, and the service life of the ceramic heating body is prolonged.

The above only is the partial embodiment of the present invention, not therefore the limitation of the protection scope of the present invention, all the uses of the equivalent device or equivalent flow transformation made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, all the same principles are included in the patent protection scope of the present invention.

Claims

1. A ceramic heating element for an electronic atomizer, comprising:

a ceramic substrate;

the heating layer is attached to the surface of the ceramic substrate;

wherein the surface of the ceramic substrate, which is in contact with the heating layer, is provided with a plurality of microgrooves; in the direction parallel to the surface of the ceramic substrate, the maximum size of the cross section of the micro groove is larger than the size of the opening of the micro groove; the heating layer is at least partially filled in the micro-grooves to form fixing parts, and the maximum size of the cross section of each fixing part is larger than the size of the opening of each micro-groove in the direction parallel to the surface of the ceramic substrate.

2. A ceramic heat-generating body as described in claim 1, wherein a cross-sectional shape of the micro groove in a direction perpendicular to a surface of the ceramic base is a major arc or a trapezoid.

3. A ceramic heat-generating body as described in claim 1, wherein the micro grooves include a first sub-micro groove and a second sub-micro groove, the first sub-micro groove being located at an end of the second sub-micro groove remote from the heat-generating layer; the cross section of the first sub-micro groove in the direction perpendicular to the surface of the ceramic substrate is an arc, and the second sub-micro groove is a columnar through hole.

4. A ceramic heat-generating body as described in claim 1, wherein adjacent ones of said micro grooves communicate with each other through a connecting hole, and said fixing portion is partially filled in said connecting hole.

5. A ceramic heat-generating body as described in claim 1, wherein the size of the micro groove is 10 to 100 μm.

6. A ceramic heating element for an electronic atomizer, comprising:

a porous ceramic matrix having a surface with a plurality of first micropores;

the ceramic covering layer is arranged on the surface of the porous ceramic matrix and is attached to the porous ceramic matrix; the ceramic covering layer is provided with a plurality of second micropores which are through holes;

the heating layer is arranged on the surface of the ceramic covering layer, which is far away from the porous ceramic base body;

7. A ceramic heat-generating body as described in claim 6, wherein a sectional shape of the groove in a direction perpendicular to a surface of the porous ceramic base body is a major arc.

8. A ceramic heat-generating body as described in claim 6, wherein a sectional shape of the groove in a direction perpendicular to the surface of the porous ceramic base is a trapezoid, a shorter base side of the trapezoid being located on a side away from the porous ceramic base.

9. A ceramic heat-generating body as described in claim 6, wherein said second fine pores include a first sub-fine pore and a second sub-fine pore, said second sub-fine pore being provided at an end of said first sub-fine pore away from said porous ceramic base; the size of the first sub-micropores is gradually reduced at least in a section in the direction away from the porous ceramic matrix; the shape and size of the second sub-micropores are not changed in a direction away from the porous ceramic base.

10. A ceramic heat-generating body as described in claim 9, wherein a cross-sectional shape of the first micro-pores in a direction perpendicular to the surface of the porous ceramic base is a minor arc, the first micro-pores and the first sub-micro-pores cooperate to form a sub-groove, a cross-sectional shape of the sub-groove in a direction perpendicular to the surface of the porous ceramic base is a major arc, and the second sub-micro-pores are columnar through-holes.

11. A ceramic heat-generating body as described in claim 6, wherein adjacent ones of said recesses are communicated through a connecting hole, and said fixing portion is partially filled in said connecting hole.

12. A ceramic heat-generating body as described in claim 6, characterized in that the size of said first fine pores is 10 to 100 micrometers, and the size of said second fine pores is 10 to 100 micrometers.

13. A ceramic heating element for an electronic atomizer, comprising:

a porous ceramic matrix having a surface with a plurality of first micropores;

14. An atomizer characterized by comprising a ceramic heat-generating body, said ceramic heat-generating body being the ceramic heat-generating body according to any one of claims 1 to 13.

15. An electronic atomizer, comprising an atomizer according to claim 14 and a body.