阅读说明：本技术 雾化芯、雾化器、电子雾化装置及雾化芯制作方法 (Atomizing core, atomizer, electronic atomizing device and manufacturing method of atomizing core ) 是由 刘望生 张威 朱彩强 周宏明 于 2020-12-09 设计创作，主要内容包括：本发明涉及一种雾化芯、雾化器、电子雾化装置和雾化芯制作方法。雾化芯包括：加热管,包括用于产生热量以将液体雾化的加热件。预热管,套设在所述加热管之外,所述预热管包括产生预热温度低于液体雾化温度的预热件。及基体管,套设在所述预热管之外并用于吸收液体,所述基体管中的液体经所述预热管预热后进入所述加热管雾化。预热管中预热件产生的部分热量可以传输至基体管和加热管,基体管和加热管中的液体吸收热量后使得自身粘度降低,从而合理提高液体在基体管、预热管和加热管中的传输速度,确保加热管的液体供应速度能匹配液体消耗速度,避免整个雾化芯因液体消耗速度大于供应速度而导致的干烧。(The invention relates to an atomizing core, an atomizer, an electronic atomizing device and an atomizing core manufacturing method. The atomizing core includes: a heating tube comprising a heating element for generating heat to atomize a liquid. The preheating pipe is sleeved outside the heating pipe and comprises a preheating piece generating preheating temperature lower than liquid atomization temperature. And the base body pipe is sleeved outside the preheating pipe and used for absorbing liquid, and the liquid in the base body pipe enters the heating pipe for atomization after being preheated by the preheating pipe. Partial heat generated by the preheating part in the preheating pipe can be transmitted to the base pipe and the heating pipe, and the liquid in the base pipe and the heating pipe absorbs the heat to reduce the viscosity of the liquid, so that the transmission speed of the liquid in the base pipe, the preheating pipe and the heating pipe is reasonably increased, the liquid supply speed of the heating pipe can be matched with the liquid consumption speed, and the dry burning caused by the fact that the liquid consumption speed of the whole atomizing core is greater than the supply speed is avoided.)

1. An atomizing core, comprising:

a heating pipe including a heating member for generating heat to atomize the liquid;

the preheating pipe is sleeved outside the heating pipe and comprises a preheating piece generating preheating temperature lower than liquid atomization temperature; and

and the base body pipe is sleeved outside the preheating pipe and used for absorbing liquid, and the liquid in the base body pipe enters the heating pipe for atomization after being preheated by the preheating pipe.

2. The atomizing core of claim 1, wherein the preheating tube includes a plurality of preheating units nested one within the other, each preheating unit including a preheating sleeve having an inner wall surface bounding an inner cavity thereof and the preheating member attached to the inner wall surface.

3. The atomizing core of claim 2, wherein the warmers within each of the warmers form a parallel circuit or a series circuit.

4. The atomizing core of claim 2, wherein the heating tube further includes a heating sleeve disposed through the preheating sleeve, the heating sleeve having an atomizing surface bounding an inner cavity thereof, the heating element being attached to the atomizing surface, the heating element and the preheating element forming a parallel circuit or a series circuit.

5. The atomizing core of claim 4, wherein the wall thickness of both the heating sleeve and the pre-heat sleeve is 0.05mm to 0.4mm, the pore size of the micro-pores of both the heating sleeve and the pre-heat sleeve is 10 μm to 150 μm, and the porosity of both the heating sleeve and the pre-heat sleeve is 30% to 70%.

6. The atomizing core of claim 1, wherein the wall thickness of the base tube is 0.2mm to 2mm, the pore size of the micropores in the base tube is 10 μm to 150 μm, and the porosity of the base tube is 30% to 70%.

7. The atomizing core of claim 1, further comprising a first electrode and a second electrode electrically connected to the heating element at the same time, at least one of the first electrode and the second electrode being located in the interior cavity of the heating tube.

8. The atomizing core of claim 7, wherein the first electrode and the second electrode are spaced apart in the axial direction of the heating tube by more than half of the length of the heating tube.

9. The atomizing core according to claim 1, characterized in that the axial end faces of the heating tube, the preheating tube and the base tube are flush with each other and have circular cross sections.

10. The atomizing core of claim 1, wherein the preheating temperature of the preheating member is from 40 ℃ to 95 ℃.

11. An atomizer, characterized in that it comprises an atomizing core according to any one of claims 1 to 10.

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

13. The manufacturing method of the atomization core is characterized by comprising the following steps:

generating a heating sheet and at least one preheating sheet by a tape casting process;

a heating piece is attached to the heating sheet, and a preheating piece with the working temperature lower than the liquid atomization temperature is attached to the preheating sheet;

laminating the heating sheet to which the heating member is attached and the preheating sheet to which the preheating member is attached to each other with the heating sheet positioned at an outermost layer, and forming the heating member and the preheating member into a circuit capable of conducting;

contacting the heating sheet with a support body, and winding the laminated heating sheet and preheating sheet around the support body to form a tubular body;

forming a base tube sleeved on the tubular body through an injection molding process, wherein the tubular body and the base tube jointly form an atomized blank body; and

and unloading the support body from the atomized blank body, and sintering the atomized blank body to form an atomized core.

14. The atomizing core manufacturing method according to claim 13, characterized in that, in the lamination process, the surfaces of the preheating plates on which the preheating members are provided are all disposed facing the heating plates, and the surfaces of the heating plates on which the heating members are provided are disposed facing away from the preheating plates.

15. The atomizing core manufacturing method according to claim 13, characterized in that the support body is made cylindrical.

16. The atomizing core manufacturing method according to claim 13, characterized in that the respective preheating members are connected in parallel with each other and then connected in parallel with the heating member, or the respective preheating members are connected in series with each other and then connected in series with the heating member.

17. The method for manufacturing the atomizing core according to claim 13, wherein before sintering at a temperature of 700 ℃ to 1100 ℃, the atomizing blank is subjected to warm isostatic pressing treatment, and then the atomizing blank subjected to warm isostatic pressing treatment is subjected to gel removal treatment, wherein in the gel removal treatment process, the temperature rise rate is not higher than 2 ℃/min and the heat preservation time is not lower than 2 h.

18. The method for manufacturing the atomizing core according to claim 13, wherein a first through hole is formed in the heating sheet through a laser drilling process, a first conductive paste is filled in the first through hole, and then a heating element electrically connected with the first conductive paste is arranged on the heating sheet through a screen printing process; when a plurality of preheating pieces are arranged, a preheating piece is directly arranged on one preheating piece through a silk-screen printing process, a second through hole is formed on the other residual preheating pieces through a laser drilling process, second conductive paste is filled in the second through hole, and then the preheating piece electrically connected with the second conductive paste is arranged through the silk-screen printing process.

19. The method of claim 13, wherein the heating plate, the preheating plate and the base tube are made of ceramic materials.

Technical Field

The invention relates to the technical field of atomization, in particular to an atomization core, an atomizer, an electronic atomization device and an atomization core manufacturing method.

Background

The aerosol burnt by the traditional atomizing substrate has dozens of harmful substances, such as tar, which can cause great harm to human health, and the aerosol is diffused in the air, so that the aerosol can cause harm to human bodies after being inhaled by surrounding people. The electronic atomization device has the appearance and the taste similar to those of the traditional atomization substrate, but does not usually contain tar, suspended particles and other harmful ingredients in the traditional atomization substrate, so the electronic atomization device is widely used as a substitute of the traditional atomization substrate.

The electronic atomizer comprises an atomizer including an atomizing core for atomizing a liquid into a smokable aerosol. However, with conventional atomizing wicks, there is typically a dry burn phenomenon due to the liquid being consumed at a rate greater than the supply rate, which will affect the user's smoking experience.

Disclosure of Invention

The invention solves a technical problem of how to prevent the atomizing core from generating dry burning.

An atomizing cartridge comprising:

a heating pipe including a heating member for generating heat to atomize the liquid;

the preheating pipe is sleeved outside the heating pipe and comprises a preheating piece generating preheating temperature lower than liquid atomization temperature; and

and the base body pipe is sleeved outside the preheating pipe and used for absorbing liquid, and the liquid in the base body pipe enters the heating pipe for atomization after being preheated by the preheating pipe.

In one embodiment, the preheating pipe includes a plurality of preheating units sequentially sleeved, each preheating unit includes a preheating sleeve and the preheating member, the preheating sleeve has an inner wall surface defining a boundary of an inner cavity of the preheating sleeve, and the preheating member is attached to the inner wall surface.

In one embodiment, the preheating parts in each preheating unit form a parallel circuit or a series circuit.

In one embodiment, the heating tube further includes a heating sleeve disposed through the preheating sleeve, the heating sleeve has an atomizing surface defining an inner cavity boundary thereof, the heating element is attached to the atomizing surface, and the heating element and the preheating element form a parallel circuit or a series circuit.

In one embodiment, the wall thickness of both the heating sleeve and the preheating sleeve is 0.05mm to 0.4mm, the pore diameter of the micropores of both the heating sleeve and the preheating sleeve is 10 μm to 150 μm, and the porosity of both the heating sleeve and the preheating sleeve is 30% to 70%.

In one embodiment, the wall thickness of the matrix tube is 0.2mm to 2mm, the pore diameter of the micropores in the matrix tube is 10 μm to 150 μm, and the porosity of the matrix tube is 30% to 70%.

In one embodiment, the heating device further comprises a first electrode and a second electrode which are electrically connected with the heating element at the same time, and at least one of the first electrode and the second electrode is positioned in the inner cavity of the heating tube.

In one embodiment, the first electrode and the second electrode are spaced apart in the axial direction of the heating tube by a distance greater than half the length of the heating tube.

In one embodiment, the end surfaces of the heating tube, the preheating tube and the base tube in the axial direction are flush with each other, and the cross sections of the heating tube, the preheating tube and the base tube are all circular rings.

In one embodiment, the preheating temperature of the preheating part is 40 ℃ to 95 ℃.

An atomizer comprising the atomizing core of any one of the above.

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

A manufacturing method of an atomization core comprises the following steps:

generating a heating sheet and at least one preheating sheet by a tape casting process;

a heating piece is attached to the heating sheet, and a preheating piece with the working temperature lower than the liquid atomization temperature is attached to the preheating sheet;

laminating the heating sheet to which the heating member is attached and the preheating sheet to which the preheating member is attached to each other with the heating sheet positioned at an outermost layer, and forming the heating member and the preheating member into a circuit capable of conducting;

contacting the heating sheet with a support body, and winding the laminated heating sheet and preheating sheet around the support body to form a tubular body;

forming a base tube sleeved on the tubular body through an injection molding process, wherein the tubular body and the base tube jointly form an atomized blank body; and

and unloading the support body from the atomized blank body, and sintering the atomized blank body to form an atomized core.

In one embodiment, during lamination, the surfaces of the preheating sheets on which the preheating members are disposed are all facing the heating sheets, and the surfaces of the heating sheets on which the heating members are disposed facing away from the preheating sheets.

In one embodiment, the support body is made cylindrical.

In one embodiment, the preheating parts are connected in parallel with each other and then connected in parallel with the heating part, or the preheating parts are connected in series with each other and then connected in series with the heating part.

In one embodiment, before sintering at a temperature of 700-1100 ℃, the atomized blank is subjected to warm isostatic pressing treatment, and then the atomized blank subjected to warm isostatic pressing treatment is subjected to glue removal treatment, wherein in the glue removal treatment process, the heating rate is not higher than 2 ℃/min and the heat preservation time is not lower than 2 h.

In one embodiment, a first through hole is formed in the heating sheet through a laser drilling process, first conductive paste is filled in the first through hole, and then a heating element electrically connected with the first conductive paste is arranged on the heating sheet through a screen printing process; when a plurality of preheating pieces are arranged, a preheating piece is directly arranged on one preheating piece through a silk-screen printing process, a second through hole is formed on the other residual preheating pieces through a laser drilling process, second conductive paste is filled in the second through hole, and then the preheating piece electrically connected with the second conductive paste is arranged through the silk-screen printing process.

In one embodiment, the heating plate, the preheating plate and the substrate tube are all made of ceramic materials.

One technical effect of one embodiment of the invention is that: owing to set up the preheating tube, the part heat that preheats the piece production in the preheating tube can be transmitted to base member pipe and heating pipe, make self viscosity reduce after the liquid absorption heat in base member pipe and the heating pipe, thereby rationally improve the transmission rate of liquid in base member pipe, preheating tube and heating pipe, make liquid can reach the heating pipe in the express delivery and atomize, ensure that the liquid supply speed of heating pipe can match liquid consumption speed, avoid whole atomizing core to be greater than the dry combustion method that supply speed leads to because of liquid consumption speed, thereby avoid the burnt flavor and the toxic gas that dry combustion method produced. Particularly for high-viscosity liquid with relatively poor flowing property, the atomizing core can well overcome the defects caused by the high viscosity of the liquid and avoid dry burning.

Drawings

Fig. 1 is a schematic perspective view of an atomizing core according to an embodiment;

FIG. 2 is a schematic perspective view of the atomizing core of FIG. 1 from another perspective;

FIG. 3 is an exploded view of the atomizing core of FIG. 1;

FIG. 4 is a schematic perspective cross-sectional view of FIG. 3;

FIG. 5 is an enlarged view of the structure at A in FIG. 4;

FIG. 6 is a schematic cross-sectional view of the atomizing core of FIG. 1;

FIG. 7 is a schematic perspective view of an atomizing core according to another embodiment;

fig. 8 is a process flow diagram of a method for fabricating an atomizing core according to an embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth 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 also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1, 2 and 3, the present invention provides an atomizer having a reservoir formed therein and including an atomizing core 10, the reservoir storing a liquid, which may be an aerosol generating substrate such as oil. The reservoir supplies liquid to the atomizing cartridge 10, and the atomizing cartridge 10 generates heat and atomizes the liquid into an aerosol that can be drawn by a user. The atomizing core 10 includes a heating tube 100, a preheating tube 200, and a base tube 300.

Referring to fig. 3, 4 and 5, the number of the heating tube 100 may be one, the heating tube 100 includes a heating sleeve 110 and a heating member 120, and the heating sleeve 110 may be a cylindrical sleeve, so that the entire heating tube 100 has a cylindrical tubular structure, that is, the cross section of the heating tube 100 has a circular ring shape. The heating sleeve 110 has an atomizing surface 111, which atomizing surface 111 delimits the interior of the heating sleeve 110. The heating member 120 may be a membrane-like structure, and the heating member 120 may be directly attached to the atomizing surface 111. The heating element 120 may be made of silver, silver palladium, silver platinum, or the like, or may be made of conductive paste formed by nickel-chromium, nickel, iron nickel-chromium, or the like, and formed by silk-screening on the heating sleeve 110, and the liquid may be atomized by the temperature generated by the heating element 120. The heating sleeve 110 comprises a porous ceramic material, so that a large number of micropores are formed in the heating sleeve 110 and have a certain porosity, the pore diameter of the micropores is 10 μm to 150 μm, the specific value of the micropores may be 10 μm, 50 μm or 150 μm, etc., the porosity may be 30% to 70%, and the specific value of the porosity may be 30%, 50% or 70%, etc. The wall thickness of the heating sleeve 110 cannot be too large, the too large wall thickness increases the forming difficulty of the heating sleeve 110, and the too small wall thickness cannot ensure the aperture of the micro-hole and the uniformity of the wall thickness of each part of the heating sleeve 110, so that the wall thickness of the heating sleeve 110 is 0.05mm to 0.4mm, and the specific value of the wall thickness can be 0.05mm, 0.2mm or 0.4 mm.

The preheating pipe 200 is sleeved outside the heating pipe 100, the preheating pipe 200 may include a plurality of preheating units 230 sequentially sleeved, for example, the number of the preheating units 230 may be four, each preheating unit 230 includes a preheating sleeve 210 and a preheating piece 220, and the preheating sleeve 210 and the heating sleeve 110 may be cylindrical sleeves coaxially disposed, so that each preheating unit 230 and the entire preheating pipe 200 are all in a cylindrical tubular structure, that is, the cross section of the preheating pipe 200 is in a circular ring shape. The material of the preheating sleeve 210 may be the same as that of the heating sleeve 110. The pre-heat sleeve 210 has an inner wall surface 211, the inner wall surface 211 bounding an inner cavity of the pre-heat sleeve 210. The preheating piece 220 can be of a diaphragm-shaped structure, the preheating piece 220 can be directly attached to the inner wall surface 211, the preheating piece 220 can be made of materials such as silver, silver palladium, silver platinum and the like, or can be made of conductive paste formed by materials such as nickel chromium, nickel or iron nickel chromium and the like and formed by silk-screening the conductive paste on the preheating sleeve 210, the preheating temperature generated by the preheating piece 220 cannot atomize liquid, the preheating temperature is 40-95 ℃, and the specific value of the preheating temperature can be 40 ℃, 50 ℃ or 95 ℃ and the like. Obviously, the heating temperature generated by the heating member 120 can atomize the liquid so that the heating temperature of the heating member 120 is greater than or equal to the atomizing temperature, i.e., the preheating temperature generated by the preheating member 220 is less than the heating temperature generated by the heating member 120. The preheating sleeve 210 comprises a porous ceramic material, so that a large number of micropores are formed in the preheating sleeve 210 and have a certain porosity, the pore diameter of the micropores is 10 μm to 150 μm, the specific value of the micropores may be 10 μm, 50 μm or 150 μm, etc., the porosity may be 30% to 70%, and the specific value of the porosity may be 30%, 50% or 70%, etc. The wall thickness of preheating sleeve 210 can not be too big and undersize, and the shaping degree of difficulty of preheating sleeve 210 has been increased to too big wall thickness, and the uniformity of micropore's aperture and preheating sleeve 210 wall thickness everywhere can not be guaranteed to the wall thickness of undersize, so preheating sleeve 210's wall thickness is 0.05mm to 0.4mm, and the concrete value of this wall thickness can be 0.05mm, 0.2mm or 0.4mm etc.. The wall thickness of both the pre-heat sleeve 210 and the heating sleeve 110 may be equal.

The substrate tube 300 is sleeved outside the preheating tube 200, and the substrate tube 300 is a cylindrical tubular structure, i.e. the cross section of the substrate tube 300 is circular. The heating tube 100, the preheating tube 200 and the base tube 300 can be coaxially arranged and sequentially sleeved from inside to outside, and the end surfaces of the three in the axial direction can be flush with each other. The substrate tube 300 comprises a porous ceramic material, so that a large number of micropores are formed in the substrate tube 300 and have a certain porosity, the pore diameter of the micropores is 10 μm to 150 μm, the specific value of the micropores can be 10 μm, 50 μm or 150 μm, etc., the porosity can be 30% to 70%, and the specific value of the porosity can be 30%, 50% or 70%, etc. The wall thickness of base member pipe 300 can not be too big and undersize, and too big wall thickness makes base member pipe 300's drain velocity slower, and the drain velocity of base member pipe 300 is faster for the wall thickness of undersize, so base member pipe 300's wall thickness is 0.2mm to 2mm, and the concrete value of this wall thickness can be 0.2mm, 1mm or 2mm etc.. The wall thickness of substrate tube 300 may be greater than the wall thickness of both heating sleeve 110 and pre-heat sleeve 210.

When the atomizing core 10 works, the base tube 300 sucks liquid from the liquid storage cavity, the liquid in the base tube 300 is input to the heating tube 100 through the preheating tube 200, the liquid in the heating tube 100 is atomized on the atomizing surface 111 to form aerosol, and the inner cavity of the heating tube 100 is the inner cavity of the whole atomizing core 10, which is actually the flow guide channel 11 for aerosol to flow and discharge. Because the preheating pipe 200 is arranged, on one hand, partial heat generated by the preheating part 220 in the preheating pipe 200 can be transmitted to the base pipe 300 and the heating pipe 100, the viscosity of liquid in the base pipe 300 and the heating pipe 100 is reduced after the liquid absorbs the heat, so that the transmission speed of the liquid in the base pipe 300, the preheating pipe 200 and the heating pipe 100 is reasonably increased, the liquid can reach the atomizing surface 111 for atomization in an express way, the supply speed of the liquid on the atomizing surface 111 can be matched with the consumption speed of the liquid, the dry burning of the whole atomizing core 10 caused by the fact that the liquid consumption speed is greater than the supply speed is avoided, and the scorched smell and the toxic gas generated by the dry burning are avoided. Particularly for high viscosity liquids with relatively poor flow properties, the atomizing core 10 can well overcome the defects caused by the high viscosity of the liquid and avoid dry burning. On the other hand, the heat generated in the preheating pipe 200 preheats the heating pipe 100 to a certain extent, so that the heat distribution on the atomization surface 111 can be ensured to be uniform, that is, a uniform temperature field is formed on the atomization surface 111, and the liquid is prevented from being carbonized and generating scorched smell due to the over-high local temperature on the atomization surface 111. On the other hand, the heating element 120 is disposed on the atomizing surface 111, and the aerosol generated on the atomizing surface 111 can directly and rapidly enter the flow guide channel 11, so that the user can suck more aerosol in unit time, that is, the aerosol concentration is increased, and the smoking taste is stronger.

Since the preheating pipe 200 is provided to increase the liquid transportation speed, the wall thickness of the substrate tube 300 cannot be too small, and the substrate tube 300 with too small wall thickness further reduces the liquid transportation resistance, so that the atomization surface 111 may suffer from oil explosion due to too high liquid supply speed. Of course, too thick a wall of substrate tube 300 will also increase the liquid transport resistance, thereby weakening and counteracting the effect of pre-heat tube 200 in increasing the liquid transport rate.

Referring to fig. 1, in some embodiments, the atomizing core 10 further includes a first electrode 410, a second electrode 420, a first conductor and a second conductor, the first electrode 410 having two ends electrically connected to the first conductor and the heating element 120, and the second electrode 420 having two ends electrically connected to the second conductor and the heating element 120. At least one of the first electrode 410 and the second electrode 420 is located in the inner cavity (flow guide channel 11) of the heating tube 100, for example, both the first electrode 410 and the second electrode 420 are located in the flow guide channel 11 at the same time, see fig. 7, and for example, the first electrode 410 is located in the flow guide channel 11, and the second electrode 420 is located outside the flow guide channel. The distance between the first electrode 410 and the second electrode 420 in the axial direction of the heating tube 100 is greater than half of the length of the heating tube 100, such that the first electrode 410 is closer to one end of the heating tube 100, and the second electrode 420 is closer to the other end of the heating tube 100, in a colloquial manner, the first electrode 410 and the second electrode 420 are respectively disposed close to different two ends of the heating tube 100. Of course, the distance between the first electrode 410 and the second electrode 420 in the axial direction of the heating tube 100 may be relatively small, and in this case, the first electrode 410 and the second electrode 420 are both disposed near the same end of the heating tube 100.

The first conductor and the second conductor may be electrically connected to two electrodes on the power supply, respectively. The first conductor may be electrically connected to the first electrode 410 by welding, abutting or snap-fit connection, and the second conductor may be electrically connected to the second electrode 420 by welding, abutting or snap-fit connection. When the first electrode 410 and the second electrode 420 are respectively disposed near two ends of the heating tube 100, the first conductor and the second conductor may be respectively led out from different two ends of the heating tube 100 first; when both the first electrode 410 and the second electrode 420 are disposed near the same end of the heating tube 100 at the same time, the first conductor and the second conductor may be respectively led out from the same end of the heating tube 100 first.

In some embodiments, different preheating members 220 within the preheating tube 200 can form a parallel circuit, while preheating members 220 connected in parallel with each other can form a parallel circuit with the heating member 120. When one preheating part 220 in the preheating pipe 200 is damaged, the rest preheating parts 220 can still work normally, so that the preheating pipe 200 continues to preheat and plays a role of reducing the viscosity of the liquid to improve the transmission speed, and the working reliability of the preheating pipe 200 is ensured. Referring to fig. 1, when a parallel circuit is formed, both the first electrode 410 and the second electrode 420 are simultaneously located in the flow guide channel 11. Of course, in other embodiments, different preheating members 220 within the preheating tube 200 can be connected in series, while the preheating members 220 connected in series with each other can be connected in series with the heating member 120. Referring to fig. 7, when the series circuit is formed, the first electrode 410 is located in the flow guide channel 11, and the second electrode 420 is located outside the conduction channel.

The invention also provides an electronic atomization device which comprises a power supply and the atomizer, wherein the atomizer is connected with the power supply, for example, the atomizer and the power supply are in detachable connection. The power supply supplies power to the heating member 120 and the preheating member 220 in the atomizing core 10 so that both the heating member 120 and the preheating member 220 can convert electric energy into heat energy. Because this electron atomizing device sets up this atomizing core 10, can be so that electron atomizing device avoids the burnt flavor that the dry combustion produced, and the mouth feel of smoking is more strong simultaneously to improve electron atomizing device's user experience.

Referring to fig. 8, the present invention further provides a method for manufacturing the atomizing core, where the atomizing core 10 can be formed by the method, and the method mainly includes the following steps:

in a first step, S510, a heating sheet and at least one preheating sheet are generated through a tape casting process. Specifically, the ceramic slurry is prepared according to a predetermined formula, and is subjected to ball milling, mixing and tape casting to obtain a heating plate and a preheating plate, wherein the number of the heating plate may be one, and the number of the preheating plate may be plural, for example, four. Since the wall thickness of both the heating sleeve 110 and the preheating sleeve 210 is designed to be 0.05mm to 0.4mm, that is, the thickness of the heating sheet and the preheating sheet is designed to be 0.05mm to 0.4m, it is possible to ensure the uniform thickness of the heating sheet and the preheating sheet after the tape casting, and to form micropores with a reasonable pore size.

Second, the heating member 120 is attached to the heating sheet, and the preheating member 220 having a working temperature lower than the liquid atomization temperature is attached to the preheating sheet, S520. Referring to fig. 6, specifically, a first through hole 112 is formed in the heating sheet, the first through hole 112 may be formed by a laser drilling process, a first conductive paste is filled in the first through hole 112, and after the first conductive paste is cured and formed, a heating member 120 is disposed on the heating sheet by a screen printing process, and the heating member 120 is electrically connected to the first conductive paste. When a plurality of preheating plates are provided, one of the preheating plates does not need to be perforated, and the preheating part 220 can be directly arranged on the preheating plate through a silk-screen printing process. And for the rest other preheating pieces, forming a second through hole 212 by a laser drilling process, filling second conductive paste into the second through hole 212, after the second conductive paste is solidified and formed, arranging preheating pieces 220 on the preheating pieces by a screen printing process, wherein the preheating pieces 220 on the preheating pieces are electrically connected with the second conductive paste on the preheating pieces.

Third, the heating sheet to which the heating member 120 is attached and the preheating sheet to which the preheating member 220 is attached are stacked one on another with the heating sheet positioned at the outermost layer, and the heating member 120 and the preheating member 220 are formed into a circuit capable of being conducted S530. Specifically, in the lamination process, the surfaces of the preheating plates on which the preheating members 220 are disposed are all facing the heating plates, and the surfaces of the heating plates on which the heating members 120 are disposed facing away from the preheating plates. For example, a support plane is provided, the surface of the heating sheet provided with the heating elements 120 is directed downwards and is brought into direct contact with the support plane, so that the heating sheet is carried on the support plane; then, the surface of one of the preheating sheets on which the preheating member 220 is disposed faces downward and is brought into direct contact with the surface of the heating sheet on which the heating member 120 is not disposed, so that the preheating sheet and the heating sheet are stacked one on another; the other preheating sheets are stacked in order with the surfaces thereof provided with the preheating members 220 facing downward, and of course, the preheating sheet not perforated is stacked on the uppermost layer. After the laminated body is formed by this lamination, the heating sheet is located at the lowermost layer, that is, at the outermost layer of the entire laminated body. Meanwhile, for the circuit arrangement of the heating element 120 and the preheating element 220, through the action of the first conductive paste and the second conductive paste, the preheating elements 220 can be connected in parallel with the heating element 120, or the preheating elements 220 can be connected in series with the heating element 120.

A fourth step, S540, of bringing the heating sheet into contact with the support body and winding the stacked heating sheet and preheating sheet around the support body to form a tubular body, specifically, providing a cylindrical support body and bringing the heating sheet into direct contact with the support body, that is, with the heating sheet closest to the support body, thereby winding the stacked body around the support body to form a tubular body. In view of the design of the thickness of the heating sheet and the preheating sheet to be 0.05mm to 0.4m, it is possible to ensure good winding performance of the heating sheet and the preheating sheet, and prevent the formation of the atomizing core 10 from being affected by the occurrence of wrinkles during winding. It will be apparent that the wound heating sheet will form the heating sleeve 110 and the wound preheating sheet will form the preheating sleeve 210.

And fifthly, S550, forming the base tube 300 sleeved on the tubular body through an injection molding process, wherein the tubular body and the base tube 300 jointly form an atomized blank body. Specifically, the atomized blank is placed in an injection mold, and a slurry containing a ceramic material is injected into a cavity of the mold through the injection molding machine, and of course, the slurry forming the base tube 300 is similar to the slurry forming the heating plate and the preheating plate in terms of material system and has matched thermal expansion properties. After the slurry is cooled and formed, the substrate tube 300 is sleeved outside the preheating sleeve 210 at the outermost layer.

And a sixth step, S560, unloading the support body from the atomized blank body, and sintering the atomized blank body to form the atomized core 10. Specifically, before sintering, the atomized blank is subjected to warm isostatic pressing, that is, the atomized blank is uniformly extruded in all directions by the pressure medium, so that the atomized blank is structurally firmer. And then carrying out glue discharging treatment on the atomized blank after the warm isostatic pressing treatment so as to decompose and discharge organic matters in the atomized blank by heating the atomized blank. In the heating process, the heating rate is not higher than 2 ℃/min, after the temperature is raised to the set temperature, the set temperature is kept constant and is kept for a certain time to form heat preservation treatment, and the time of the heat preservation treatment is not lower than 2h, so that the connection strength among the heating sleeve 110, the preheating sleeve 210 and the base pipe 300 can be well ensured, and the connection strength among the heating member 120 and the heating sleeve 110, and the connection strength among the preheating member 220 and the preheating sleeve 210 can also be ensured. And after the binder removal treatment is finished, sintering the atomized blank to sinter the atomized blank in the semi-finished product form into the atomized core 10 in the product form, wherein the sintering temperature is controlled between 700 ℃ and 1100 ℃ in the sintering process. After the atomizing core 10 is sintered and molded, the average pore diameter of the whole atomizing core 10 can reach 100 to 80 μm, and the porosity is 30 to 70 percent.

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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.