WO2024255359A1 - Electronic cigarette atomizer - Google Patents

Abstract

Disclosed in the present invention is an electronic cigarette atomizer, comprising a hollow shell, an atomization support, a porous ceramic heating body and an atomization base. The atomization support comprises a first housing and a second housing; the first housing comprises a tubular body; a flat flange transversely extending is arranged on the left side and the right side of the bottom of the tubular body; a frame is connected to the middle of the lower part of the flat flange; a first cavity running through vertically is formed in the tubular body and the frame; the second housing is transversely arranged in the first cavity in a tunnel shape; the left side and the right side of the second housing are connected to the first housing, and a liquid guide through hole penetrates through a connecting portion; gaps are formed between the front side and the rear side of the second housing and the first housing; the bottom of the second housing is open; the porous ceramic heating body is sleeved on the lower half part in the second housing; and a second cavity is defined by the inner wall of the upper half part of the second housing and the upper surface of the porous ceramic heating body, the second cavity is not communicated with the first cavity, and the second cavity and the liquid guide through hole form a liquid guide channel running though in the left-right direction.

Description

Electronic cigarette atomizer Technical Field

The present invention relates to the technical field of electronic cigarette atomization, and more particularly to an electronic cigarette atomizer.

Background Art

The existing electronic cigarette is an electronic atomization device, which generally includes a battery assembly and an atomizer. The battery assembly is equipped with a battery, and the battery supplies power to the atomizer. The atomizer includes a heating element in the atomization device. When the heating element is powered on, it can heat the solution to be atomized, that is, the atomizing liquid, and atomize it into aerosol or aerosol. The atomizing liquid is the tobacco liquid stored in the liquid storage chamber of the atomizer.

The existing electronic cigarette atomizers on the market have already used porous ceramic heaters in large quantities as the heating elements of the atomizers. Porous ceramic heaters are a public technology. These porous ceramic heaters are generally provided with liquid guide grooves, liquid guide holes or air flow holes in the middle, but such grooves increase the difficulty of the manufacturing process of the porous ceramic heaters, and are prone to cracking during high-temperature operation, making the atomizer prone to malfunction and leakage of smoke liquid. Due to the design of the grooves of these porous ceramic heaters, the airflow channel and the liquid guide channel are very close. When negative pressure is generated in the atomization chamber, it is easy for the smoke liquid in the liquid guide channel to be sucked into the airflow channel, and it is also easy for the smoke liquid to leak.

In addition, during the operation of the atomizer, when the user draws in the smoke from the electronic cigarette, a certain negative pressure will be generated in the atomization chamber and the atomization channel to facilitate the suction of smoke or airflow. As the smoke liquid in the liquid storage chamber is consumed, a certain negative pressure will also be generated in the liquid storage chamber. This negative pressure is difficult to eliminate due to the sealing performance of the liquid storage chamber. After a certain period of accumulation, the negative pressure in the liquid storage chamber gradually increases. When the negative pressure in the liquid storage chamber accumulates to a certain extent, the atomized liquid stored therein will be sucked back by the negative pressure, making it difficult to penetrate through the porous ceramic body, resulting in a lack of atomized liquid when the heating element is working, so that the atomization amount continues to decrease, and it is even very easy to cause dry burning of the porous ceramic heating element, resulting in its ablation and damage.

Technical issues

In view of the shortcomings of the prior art, the present invention aims to provide an electronic cigarette atomizer which can prevent leakage of atomized liquid and reduce the negative pressure in the liquid storage chamber.

Technical Solutions

To achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: an electronic cigarette atomizer, comprising a hollow shell, an atomizing device is arranged inside the shell, and the atomizing device comprises an atomizing bracket, a porous ceramic heating element arranged inside the atomizing bracket, and an atomizing seat sleeved on the lower part of the atomizing bracket;

The atomizer bracket includes a hollow first shell and a hollow second shell, the first shell includes a tubular body, the bottom left and right sides of the tubular body are provided with flat flanges extending laterally, the lower middle of the flat flange is connected with a frame body, the tubular body and the frame are provided with a first cavity that passes through from top to bottom, the second shell is tunnel-shaped and is laterally arranged in the first cavity, the left and right sides of the second shell are connected to the first shell and a liquid guide hole is provided through the portion connected to the tubular body, a gap is provided between the front and rear sides of the second shell and the first shell, and the bottom of the second shell is open;

The porous ceramic heating element is mounted in the lower half of the second shell, and the inner wall of the upper half of the second shell and the upper surface of the porous ceramic heating element form a second cavity. The second cavity is not connected to the first cavity, and the second cavity and the liquid conduction hole form a liquid conduction channel that runs through from left to right.

Preferably, the cross-sectional shape of the atomizer seat is consistent with that of the flat flange, a concave cavity is recessed downwardly on the upper part of the atomizer seat, an air inlet hole is provided at the bottom center of the concave cavity, an annular groove is provided on the outer side of the concave cavity, the frame of the atomizer bracket is inserted into the annular groove, and the upper planes on the left and right sides of the atomizer seat are fitted on the lower plane of the flat flange; the bottom of the porous ceramic heating element is completely open to the concave cavity, the concave cavity constitutes an atomization cavity, and the two sides of the concave cavity are upwardly connected to the first cavity, and the air inlet hole, the concave cavity and the first cavity are connected to form an air flow channel.

Preferably, the top of the second shell gradually rises from the middle toward the liquid-conducting through holes on both sides to discharge bubbles in the liquid-conducting channel.

Preferably, the atomizer seat is made of a sealing material, and an annular convex strip is further provided on the outer wall of the atomizer seat.

Preferably, the porous ceramic heating element is configured as a rectangular parallelepiped, and the outer side wall of the porous ceramic heating element is also wrapped with a sealing sleeve.

Preferably, a curved air return groove is provided on the outer wall portion of the frame of the atomizer bracket, the bottom end of the air return groove is connected to the bottom of the first cavity, the upper end of the air return groove is connected to the outer wall of the flat flange, and the air return groove and the atomizer seat together form an air return channel.

Preferably, the porous ceramic heating element comprises a porous ceramic body and a heating resistor arranged at the bottom of the porous ceramic body, the heating resistor is composed of a heating wire, a heating sheet, or a heating film, and electrode ends are provided at both ends of the heating resistor.

Preferably, the upper end of the shell is provided with a suction port and the lower end is provided with an opening, the suction port is extended to the inside of the shell and is provided with a smoke outlet pipe, the atomization device is inserted into the shell from the opening, the upper end of the tubular body of the atomization bracket is connected to the smoke outlet pipe, the outer wall of the atomization seat is tightly fitted with the inner wall of the shell, the inner wall of the shell, the smoke outlet pipe and the cavity between the atomization bracket constitute a liquid storage chamber for storing atomized liquid, and the atomized liquid in the liquid storage chamber can flow to the upper surface of the porous ceramic heating element through the liquid guide channel.

Preferably, the upper end of the tubular body of the atomizing support is connected to the smoke outlet pipe via a liquid isolating seat, and the liquid isolating seat has sealing properties.

Preferably, the atomization device also includes a base, which is connected to the bottom of the atomization seat and sleeved on the opening of the outer shell. Two electrode columns are provided on the base. The top of the electrode column passes through the atomization seat and abuts against two electrode ends of the heating resistor provided at the bottom of the porous ceramic heating element.

Beneficial Effects

The unique structural design of the atomizer bracket of the electronic cigarette atomizer makes it easy to install the rectangular porous ceramic heating element, and keeps the liquid guide channel and the air flow channel unconnected to avoid leakage of the atomized liquid, and the tunnel-shaped liquid guide channel has a large conduction area to ensure sufficient liquid supply; the rectangular porous ceramic heating element has no liquid guide grooves, liquid guide holes or air flow holes, etc., which makes the manufacturing process simple, reduces production costs, and is not prone to cracking during production and high-temperature use, avoiding the problem that the atomizer is prone to malfunction and liquid leakage; the outer side of the porous ceramic heating element The wall is also wrapped with a sealing sleeve to prevent the atomized liquid from penetrating and leaking out from the outer walls around the porous ceramic body, thereby increasing the efficiency of the atomized liquid being conducted from top to bottom in the porous ceramic body, that is, the conversion efficiency of the atomized liquid can be increased and the atomization amount can be improved; in addition, an air return groove structure is provided on the outer wall of the frame of the atomizer bracket, which can be used to return air and reduce the negative pressure in the liquid storage chamber, thereby avoiding the accumulation of negative pressure in the liquid storage chamber when the porous ceramic heating element is working, resulting in insufficient atomized liquid supply, continuous reduction in atomization amount, and even dry burning of the porous ceramic heating element, resulting in its ablation and damage, thereby ensuring the normal and stable operation of the atomizer.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a three-dimensional structural exploded view of the atomizer of Example 1;

FIG2 is a side cross-sectional view of an atomizing support equipped with a porous ceramic heating element in Example 1;

FIG3 is a front cross-sectional view of an atomizing support equipped with a porous ceramic heating element in Example 1;

FIG4 is a three-dimensional view of the atomizing bracket of the first embodiment;

FIG5 is a second perspective view of the atomizing bracket of the first embodiment;

FIG6 is a top view of the atomizing bracket of the first embodiment;

FIG7 is a bottom view of the atomizing bracket of the first embodiment;

FIG8 is a perspective exploded structural view of the porous ceramic heating element and the sealing sleeve of Example 1;

FIG9 is a three-dimensional view of the atomizer seat of the first embodiment;

FIG10 is a side cross-sectional view of the atomizer of Example 1;

FIG11 is a front cross-sectional view of an atomizer according to Embodiment 1;

FIG12 is a side cross-sectional view of the atomizing bracket of the second embodiment;

FIG13 is a front cross-sectional view of the atomizing bracket of the second embodiment;

FIG. 14 is a front cross-sectional view of the atomizer of the second embodiment.

Best Mode for Carrying Out the Invention

The electronic cigarette atomizer of the present invention can be connected with a battery assembly to form an electronic cigarette. For the convenience of description, the electronic cigarette atomizer is placed vertically with the front side and the mouthpiece 10 facing upward as shown in FIG11. The descriptions of the components described herein such as "upper, lower, upper part, lower part, upper end, lower end, above, below, upward, downward, front and back, left and right" all refer to the up-down, left-right position relationship of the atomizer when it is placed as shown in FIG11.

Embodiments of the present invention

The present invention will be described in detail below through specific embodiments and drawings.

Example 1

As shown in FIG1 , the electronic cigarette atomizer of this embodiment has a cross-section approximately in the shape of an ellipse, and the upper end of the suction nozzle is flatter. The electronic cigarette atomizer of this embodiment is composed of a hollow shell 1 and an atomizing device arranged in the shell 1, wherein the atomizing device is composed of a liquid partition seat 2, an atomizing bracket 3, a porous ceramic heating element 4, a sealing sleeve 5, an atomizing seat 6, an electrode 7 and a base 8. A magnet 9 is also provided at the bottom of the base 8, and the magnet 9 is provided to connect the electronic cigarette atomizer with the battery assembly by magnetic attraction.

As shown in FIGS. 2 to 7 , the atomizer bracket 3 includes a hollow first shell 31 and a hollow second shell 32. The first shell 31 includes a tubular body 311 that is close to a square. The bottom left and right sides of the tubular body 311 are provided with flat flanges 312 extending laterally. The middle of the lower part of the flat flange 312 is connected to the tubular body 311 in the same central axis direction with a rectangular frame 313. The tubular body 311 and the frame 313 are provided with a first cavity 310 that passes through from top to bottom. The second shell 32 is tunnel-shaped. The left and right sides are arranged horizontally in the first cavity 310, the upper half of the second shell 32 is arranged in the tubular body, and the lower half is arranged in the frame body. The top of the second shell 32 has the shape of a tunnel dome. The left and right sides of the second shell 32 are connected to the first shell 31 and a liquid guide hole 314 is provided through the part connected to the tubular body 311. The front and rear sides of the second shell 32 are not connected to the first shell 31 but are provided with a gap. The gap keeps the first cavity connected up and down, which is convenient for air or smoke to flow upward. The bottom of the second shell 32 is open to facilitate the upward installation of the porous ceramic heating element 4. A liquid injection hole 316 is also provided on the flat flange 312, which is used to add atomized liquid through the liquid injection hole 316 during production.

The porous ceramic heating element 4 is mounted on the lower half of the second shell 32 from bottom to top, and the inner wall of the upper half of the second shell 32 and the upper surface of the porous ceramic heating element 4 enclose a second cavity 320. The second cavity 320 is not connected to the first cavity 310, and the liquid conducting hole 314 is connected to the second cavity 320 to form a liquid conducting channel 320 that is connected from left to right. The second shell 32 is designed to be tunnel-shaped and open at the bottom, which facilitates the porous ceramic heating element 4 to be mounted upward in the second shell 32, and the tunnel-shaped liquid conducting channel 320 has a large conducting area, making it easier for the atomized liquid to reach the upper surface of the porous ceramic heating element 4 through the liquid conducting channel, ensuring sufficient liquid supply.

As shown in Figures 4 and 5, the outer wall portion of the frame 313 of the atomizer bracket 3 is provided with an air return groove 315 which is circuitous and curved up and down. The bottom end of the air return groove 315 is connected to the bottom of the first cavity 310, and the upper end of the air return groove 315 is connected to the outer wall of the flat flange 313. The air return groove 315 and the atomizer seat 6 form an air return channel.

As shown in FIG8 , the porous ceramic heating element 4 is configured as a rectangular parallelepiped, and the outer wall of the porous ceramic heating element 4 is also wrapped with a sealing sleeve 5. The porous ceramic heating element 4 includes a porous ceramic body 4 and a heating resistor (not shown) disposed at the bottom of the porous ceramic body 4. The heating resistor is composed of a heating film, and electrode ends are disposed at both ends of the heating resistor. In other embodiments, the heating resistor may also be composed of a heating wire, a heating sheet, or a heating film. The porous ceramic heating element 4 is configured as a rectangular parallelepiped, and no liquid guide grooves, liquid guide holes, or air flow holes are disposed thereon, so that the manufacturing process is simple, the production cost is reduced, and cracking is not easy to occur during production and high-temperature use, thereby avoiding the problem that the atomizer is prone to failure and liquid smoke leakage is prone to occur.

As shown in Figure 9, the cross-sectional shape of the atomizer seat 6 is consistent with that of the flat flange 312, the upper part of the atomizer seat 6 is concave downwardly provided with a concave cavity 60, the bottom center of the concave cavity 60 is provided with an air inlet through hole 61, the outer side of the concave cavity 60 is provided with an annular groove 62, the frame 313 of the atomizer bracket is plugged into the annular groove 62, and the upper planes on the left and right sides of the atomizer seat 6 are fitted to the lower plane of the flat flange 312. In order to facilitate the close connection with the atomizer bracket and prevent the leakage of the atomized liquid, the atomizer seat 6 is made of a sealing material such as a soft silicone material. In order to have better sealing performance, the outer wall of the atomizer seat 6 is also provided with an annular convex strip 63, and the annular convex strip 63 can be better attached to the inner wall of the housing 1. The atomizer seat 6 is also provided with an injection hole 64 relative to the injection hole 316 of the flat flange, and the injection hole 316 is consistent with the injection hole 64, which is used to fill the atomized liquid through the injection hole 316 and the injection hole 64 in production.

The bottom of the porous ceramic heating element 4 is completely open to the concave cavity 60, and the concave cavity 60 constitutes an atomizing cavity 60. Both sides of the atomizing cavity 60 are connected to the first cavity 310 upward. The air inlet hole 61, the atomizing cavity 60 and the first cavity 310, as well as the smoke outlet pipe 11 and the suction port 10 described below are connected to form an air flow channel.

As shown in Figures 10 and 11, the upper end of the shell 1 is provided with a suction port 10 and the lower end is provided with an opening 12. The suction port 10 extends to the inside of the shell and is provided with a smoke outlet pipe 11. The atomizer device is inserted into the shell 1 from the opening 12. The upper end of the tubular body 311 of the atomizer bracket 3 is connected to the smoke outlet pipe 11, and the outer wall of the atomizer seat 5 is tightly fitted with the inner wall of the shell 1.

The inner wall of the housing 1 , the smoke outlet pipe 11 and the cavity between the atomizing bracket 3 form a liquid storage chamber 100 for storing atomized liquid. The atomized liquid in the liquid storage chamber 100 can flow to the upper surface of the porous ceramic heating element 4 through the liquid guide channel 320 .

The upper end of the tubular body 311 of the atomizing bracket 3 is connected to the smoke outlet pipe 311 via a liquid isolating seat 2, and the liquid isolating seat 2 has sealing properties.

The atomizing device also includes a base 8, which is connected to the bottom of the atomizing seat 5 and is sleeved on the opening 12 of the outer shell 1. Two electrode columns 7 are provided on the base 8. The top of the electrode column 7 passes through the atomizing seat 5 and abuts against the two electrode ends of the heating resistor provided at the bottom of the porous ceramic heating element 4.

The left and right sides of the base 8 are provided with upwardly protruding plungers 81, which are used to block the injection hole 316 and the injection hole 64. During manufacturing, after the atomized liquid is added to the liquid storage chamber 100 through the injection hole 316 and the injection hole 64, the base 8 is installed upward, and the plunger 81 provided on the base 8 blocks the injection hole 316 and the injection hole 64 upward to prevent leakage.

The direction of the continuous arrow A-A in Figure 10 is the direction of gas flow, that is, when the atomizer is working, the user inhales air from the suction port 10, and negative pressure is generated in the smoke outlet pipe 11 and the atomization chamber 60, and the outside air flows into the atomization chamber 60 from the air inlet hole of the base 7 and the air inlet through hole 61 of the atomization seat 6; at this time, the atomized liquid is heated and atomized at the bottom of the porous ceramic heating element 4, and electronic cigarette smoke is generated in the atomization chamber 60 and is carried by the outside air entering, and the electronic cigarette smoke continues to flow upward through the two sides of the porous ceramic body 4, the first cavity 310, the smoke outlet pipe 11, the suction port 10, and then is inhaled into the user's mouth.

The direction of the continuous arrow B in FIG. 11 is the flow direction of the atomized liquid when the atomizer is working. That is, when the atomizer is working, the atomized liquid stored in the liquid storage cavity 100 enters the second cavity 320 through the liquid guide hole 314, and then passes through the porous ceramic body 4 at the bottom of the second cavity 320, and penetrates downward from the upper surface of the porous ceramic body 4 and conducts to its lower surface, and the heating resistor arranged on its lower surface starts to be energized and heated, and the atomized liquid is heated and evaporated due to contact with the heating resistor, and is continuously atomized into a steam-like aerosol, namely, electronic cigarette smoke, which is emitted downward in the atomization cavity 60 and then inhaled by the user. In the present embodiment, the porous ceramic heating element 4, that is, the outer wall of the porous ceramic body 4, is also wrapped with a sealing sleeve 5, so that the atomized liquid absorbed in the porous ceramic body 4 can only penetrate downward from its upper surface and be conducted to its lower surface, and will not penetrate and leak out from the outer walls around the porous ceramic body 4, thereby preventing the atomized liquid from being sucked out from the outer walls around the porous ceramic body 4 and leaking due to the negative pressure generated in the atomization chamber 60 when the user smokes, and at the same time, the efficiency of the atomized liquid being conducted from top to bottom in the porous ceramic body 4 is increased, that is, the conversion efficiency of the atomized liquid can be increased, and the atomization amount can be improved.

An air return groove 315 is provided on the outer wall of the frame 313 of the atomizer bracket 3. Since the bottom end of the air return groove 315 is connected to the bottom of the first cavity 310 (that is, connected to the atomizer chamber 60), and the upper end of the air return groove 315 is connected to the outer wall of the flat flange 313 (that is, connected to the liquid storage chamber 100), the air return groove 315 and the atomizer seat 6 enclose a return air channel. The return air channel allows the air pressure in the atomizing chamber 60 to recover from negative pressure to atmospheric pressure when the atomizer stops working. If negative pressure accumulates in the liquid storage chamber 100 at this time, the air pressure in the atomizing chamber 60 is greater than the air pressure in the liquid storage chamber 100. The air in the atomizing chamber 60 enters the return air channel from the bottom end of the return air groove 315, and after passing through the winding return air channel, it is led out from the upper end of the return air groove 315 along the gap between the outer wall of the flat flange 313 and the inner wall of the shell 1 to the liquid storage chamber 100, thereby eliminating the negative pressure in the liquid storage chamber 100. Therefore, when the atomizer is working, the negative pressure in the liquid storage chamber 100 is eliminated, and the atomized liquid is easily diverted from the liquid storage chamber to the porous ceramic body 4 and seeps out from the bottom, so that the liquid supply is rapid and timely during atomization, avoiding the phenomenon that the porous ceramic heating element 4 is insufficiently supplied with atomized liquid, the amount of atomization is continuously reduced, and even the porous ceramic heating element is dry-burned, resulting in ablation and damage, due to the negative pressure accumulated in the liquid storage chamber 100 when the atomizer is working, thereby ensuring the normal and stable operation of the atomizer. In addition, due to the up and down circuitous and curved structure of the return air groove 315, it has a long and narrow return air channel, which has a large resistance relative to the liquid, so that even if negative pressure is generated in the atomization chamber 60, the atomized liquid in the liquid storage chamber 100 will not be reversely sucked out to the atomization chamber 60 through the return air channel.

Example 2

As shown in FIGS. 12-14 , on the basis of other structures of the first embodiment remaining unchanged, the top of the second shell 32 of the atomizing bracket 3 is gradually lifted up from the middle toward the liquid guide holes 314 on the left and right sides to discharge bubbles in the liquid guide channel 320 .

After the atomizer is working, the atomized liquid in the liquid storage chamber 100 gradually penetrates and conducts to the bottom of the porous ceramic heating element 4 to be heated and atomized, and the atomized liquid is continuously reduced. After the negative pressure is generated in the liquid storage chamber 100, the air in the atomization chamber 60 can also gradually penetrate upward from the bottom through the gaps in the porous ceramic body 4 and precipitate from its upper surface to form bubbles, and accumulate at the top of the second shell 32. If the bubbles cannot be discharged smoothly, it will affect the atomized liquid in the liquid storage chamber 100 from fully entering the liquid guide channel 320. In this embodiment, the top of the second shell 32 is gradually lifted and raised from the middle to the left and right sides of the liquid guide through hole 314, and the accumulated bubbles can be smoothly discharged upward along the top of the second shell that gradually rises to both sides, and the bubbles can be discharged quickly in the liquid guide channel 320 so that the atomized liquid can fully enter. In this embodiment, the top of the second shell 32 rises from the middle to the left and right sides in an arc shape, and of course, a straight line shape or other deformations can also be used in other embodiments.

Industrial Applicability

The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims (10)

1. An electronic cigarette atomizer, characterized in that: it comprises a hollow shell, an atomizing device is arranged inside the shell, and the atomizing device comprises an atomizing bracket, a porous ceramic heating element arranged inside the atomizing bracket, and an atomizing seat sleeved on the lower part of the atomizing bracket; The atomizer bracket includes a hollow first shell and a hollow second shell, the first shell includes a tubular body, the bottom left and right sides of the tubular body are provided with flat flanges extending laterally, the lower middle of the flat flange is connected with a frame body, the tubular body and the frame are provided with a first cavity that passes through from top to bottom, the second shell is tunnel-shaped and is laterally arranged in the first cavity, the left and right sides of the second shell are connected to the first shell and a liquid guide hole is provided through the portion connected to the tubular body, a gap is provided between the front and rear sides of the second shell and the first shell, and the bottom of the second shell is open; The porous ceramic heating element is mounted in the lower half of the second shell, and the inner wall of the upper half of the second shell and the upper surface of the porous ceramic heating element form a second cavity. The second cavity is not connected to the first cavity, and the second cavity and the liquid conduction hole form a liquid conduction channel that runs through from left to right. The electronic cigarette atomizer according to claim 1 is characterized in that: the cross-sectional shape of the atomizer seat is consistent with that of the flat flange, a concave cavity is recessed downwardly on the upper part of the atomizer seat, an air intake hole is provided at the bottom center of the concave cavity, an annular groove is provided on the outer side of the concave cavity, the frame of the atomizer bracket is inserted into the annular groove, and the upper planes on the left and right sides of the atomizer seat are fitted on the lower plane of the flat flange; the bottom of the porous ceramic heating element is completely open to the concave cavity, the concave cavity constitutes an atomization cavity, and the two sides of the concave cavity are connected to the first cavity upward, and the air intake hole, the concave cavity and the first cavity are connected to form an air flow channel. The electronic cigarette atomizer according to claim 1 is characterized in that the top of the second shell gradually rises from the middle toward the liquid guide holes on both sides to discharge bubbles in the liquid guide channel. The electronic cigarette atomizer according to claim 1 is characterized in that the atomizer seat is made of a sealing material, and the outer wall of the atomizer seat is also provided with an annular convex strip. The electronic cigarette atomizer according to claim 1 is characterized in that: the porous ceramic heating element is configured as a rectangular parallelepiped, and the outer side wall of the porous ceramic heating element is further wrapped with a sealing sleeve. The electronic cigarette atomizer according to claim 1 is characterized in that: a curved air return groove is provided on the outer side wall of the frame of the atomizer bracket, the bottom end of the air return groove is connected to the bottom of the first cavity, the upper end of the air return groove is connected to the outer wall of the flat flange, and the air return groove and the atomizer seat form an air return channel. The electronic cigarette atomizer according to claim 1 is characterized in that: the porous ceramic heating element includes a porous ceramic body and a heating resistor arranged at the bottom of the porous ceramic body, the heating resistor is composed of a heating wire, a heating sheet, or a heating film, and electrode ends are provided at both ends of the heating resistor. The electronic cigarette atomizer according to claim 1 is characterized in that: the upper end of the shell is provided with a suction port and the lower end is provided with an opening, the suction port extends to the inside of the shell and is provided with a smoke outlet pipe, the atomization device is inserted into the shell from the opening, the upper end of the tubular body of the atomization bracket is connected to the smoke outlet pipe, the outer wall of the atomization seat is tightly fitted with the inner wall of the shell, the inner wall of the shell, the smoke outlet pipe and the cavity between the atomization bracket constitute a liquid storage chamber for storing atomized liquid, and the atomized liquid in the liquid storage chamber can flow to the upper surface of the porous ceramic heating element through the liquid guide channel. The electronic cigarette atomizer according to claim 8 is characterized in that the upper end of the tubular body of the atomization bracket is connected to the smoke outlet pipe through a liquid isolation seat, and the liquid isolation seat is airtight. The electronic cigarette atomizer according to claim 8 is characterized in that: the atomization device also includes a base, the base is connected to the bottom of the atomization seat and is sleeved on the opening of the shell, two electrode columns are provided on the base, and the top of the electrode column passes through the atomization seat and abuts against two electrode ends of the heating resistor provided at the bottom of the porous ceramic heating element.