Electronic cigarette atomization core

Abstract

An electronic cigarette atomization core, comprising a buffer layer, a porous ceramic layer and a thermal resistor layer, which are sequentially stacked and tightly connected. The buffer layer and the porous ceramic layer are both provided with tiny gaps or pores, so as to absorb, be permeated by and conduct an atomization liquid, the porosity of the buffer layer being greater than that of the porous ceramic layer. The thermal resistor layer is provided with a through hole or a gap, and two ends of one surface of the thermal resistor layer are connected to electrode ends, the electrode ends being electrically connected to a positive electrode and a negative electrode of a power supply, respectively. The described electronic cigarette atomization core has the beneficial effects that the buffer layer provided therein plays a role in spacing and buffering, sufficient liquid supply amount is guaranteed, and liquid leakage from excessive liquid supply caused by excessive permeation is prevented. In addition, the buffer layer and the porous ceramic layer have a spaced structure, so that negative pressure in a liquid storage cavity can be eliminated.

Description

Electronic cigarette atomizer core Technical Field

[0001] The present invention relates to the technical field of electronic cigarette atomization, and more particularly, to an electronic cigarette atomization core. Background Art

[0002] An electronic cigarette is an electronic atomization device, generally including a power supply assembly and an atomizer. The power supply assembly is equipped with a battery, which supplies power to the atomizer. The atomizer includes an internal atomization core. When powered on, the atomization core can heat the solution to be atomized, i.e., the atomizing liquid, and atomize it into aerosol or mist. The atomizing liquid is the smoke liquid stored in the liquid storage chamber of the atomizer.

[0003] The current electronic cigarette atomization cores on the market have already made extensive use of porous ceramic materials, and the use of porous ceramic materials to infiltrate and conduct atomized liquid is a public technology. These porous ceramic bodies 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 heating element, and are prone to cracking during high-temperature operation, making the atomizer prone to malfunction and leakage of smoke liquid. In addition, since the porous ceramic body is in the atomizer, its upper surface is directly in contact with the atomized liquid in the liquid storage chamber. When the atomized liquid completely soaks its upper surface, it is easy to over-penetrate during operation due to the large amount of liquid supply, resulting in excessive liquid supply and leakage. When the atomizer shakes or the amount of atomized liquid is small, it cannot fully soak its upper surface, which easily causes insufficient liquid supply, resulting in a small amount of atomization and instability.

[0004] In addition, during the operation of the atomizer, when the user inhales the e-cigarette smoke, a certain negative pressure will be generated in the atomization chamber and the atomization channel, which facilitates 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 level, 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, resulting in a continuous decrease in the atomization volume and even easily causing the porous ceramic heating element to dry burn, resulting in its ablation, damage, and the generation of a burnt smell. Technical issues

[0005] In order to overcome the deficiencies of the above-mentioned technologies, the present invention provides an electronic cigarette atomizer core which can prevent leakage of atomized liquid and eliminate negative pressure in a liquid storage chamber. Technical Solutions

[0006] The technical solution of the present invention is achieved as follows: an electronic cigarette atomization core includes a buffer layer, a porous ceramic layer and a heating resistor layer that are stacked in sequence and tightly connected. The buffer layer and the porous ceramic layer are all provided with many non-through tiny gaps or tiny pores to absorb, penetrate and conduct the atomized liquid. The porosity of the buffer layer is greater than that of the porous ceramic layer. The heating resistor layer is provided with a number of straight through holes or gaps to allow the heated and evaporated atomized liquid to form a mist and escape. Electrode ends are also connected to both ends of one side of the heating resistor layer, and the electrode ends are used to be electrically connected to the positive and negative electrodes of a power supply respectively.

[0007] Preferably, the electrode end is an electrode layer, and the electrode layer is provided between the porous ceramic layer and the heating resistor layer.

[0008] Preferably, the buffer layer completely covers the surface of the porous ceramic layer, and at least one edge of the buffer layer exceeds the edge of the porous ceramic layer on the same side.

[0009] Preferably, the distance between one side edge of the buffer layer and the same side edge of the porous ceramic layer is set to 0.1 mm to 1.2 mm.

[0010] Preferably, the thickness of the buffer layer is less than or equal to the thickness of the porous ceramic layer.

[0011] Preferably, the thickness of the buffer layer is set to 0.5 mm to 2.0 mm, and the thickness of the porous ceramic layer is set to 1.0 mm to 2.5 mm.

[0012] Preferably, at least one through hole is provided through the middle of the buffer layer.

[0013] Preferably, the heating resistor layer is composed of a porous metal heating film or a metal heating mesh or a porous metal heating sheet.

[0014] Preferably, the electrode layer and the heating resistor layer are respectively formed on the surface of the porous ceramic layer from different conductive metal materials through a physical vapor deposition process, and the resistance of the electrode layer is much smaller than that of the heating resistor layer.

[0015] Preferably, the buffer layer is a soft body and is composed of foam metal material, or polymer porous material, organic cotton material, linen cotton material, non-woven fabric material, or plant fiber material. Beneficial effects

[0016] The porous ceramic layer of the electronic cigarette atomizer core is not provided with a liquid guide groove, liquid guide hole or air flow hole in the middle, making the porous ceramic layer easy to manufacture and improve the yield rate, and it is not easy to crack during high temperature operation, thereby making the atomizer core less prone to failure. The present invention is closely provided with a buffer layer on the porous ceramic layer so that the upper surface of the porous ceramic layer does not directly contact the atomized liquid in the liquid storage chamber, playing a certain spacing and buffering role, ensuring sufficient liquid supply, and not excessive penetration causing excessive liquid supply and leakage. In addition, the atomizer core of the present invention, since one side edge of the buffer layer exceeds the same side edge of the porous ceramic layer and is provided with a spacing to form the above-mentioned gap, when a certain negative pressure is generated in the liquid storage chamber, the gas in the atomizer chamber can flow upward through the gap and further penetrate through the gaps or pores and holes in the buffer layer and slowly pass upward and reach the liquid storage chamber, so the negative pressure of the liquid storage chamber can be eliminated, thereby preventing insufficient liquid supply caused by the negative pressure of the liquid storage chamber when the atomizer core is working, and preventing the porous ceramic layer from being dry-burned and causing it to be ablated, damaged, and produce a burnt smell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a three-dimensional view of an atomizer core according to an embodiment of the present invention;

[0018] FIG2 is a front view of the atomizer core according to an embodiment of the present invention;

[0019] FIG3 is an exploded perspective view of the atomizer core according to an embodiment of the present invention;

[0020] FIG4 is a second front view of the atomizer core according to an embodiment of the present invention;

[0021] FIG5 is a cross-sectional view of the atomizer core installed in the atomizer seat cavity according to an embodiment of the present invention;

[0022] FIG6 is a three-dimensional view of a buffer layer of an atomizer core according to another embodiment of the present invention. Best Mode for Carrying Out the Invention

[0023] The electronic cigarette atomizer core of the present invention is installed in an electronic cigarette atomizer. The electronic cigarette atomizer is connected to a battery assembly to form an electronic cigarette. When powered, the atomizer core of the present invention heats the solution to be atomized, i.e., the atomizing liquid, and atomizes it into a mist, aerosol, or electronic cigarette smoke. The atomizing liquid is the cigarette liquid stored in the liquid storage chamber of the atomizer. Modes for Carrying Out the Invention

[0024] The present invention will be described in detail below through specific examples. Example

[0025] As shown in Figures 1 to 3, the electronic cigarette atomization core of this embodiment is composed of a buffer layer 1, a porous ceramic layer 2 and a heating resistor layer 3 that are stacked in sequence and tightly connected. The buffer layer 1 and the porous ceramic layer 2 are provided with many uniformly distributed and non-through tiny gaps or tiny pores to absorb, penetrate and conduct the atomized liquid. The porosity of the buffer layer 1 is greater than that of the porous ceramic layer 2, that is, the buffer layer 1 has more or larger tiny gaps or tiny pores than the porous ceramic layer 2, so that the buffer layer 1 has better liquid permeability and air permeability than the porous ceramic layer 2. The heating resistor layer 3 is provided with a number of straight through holes or gaps so that the heated and evaporated atomized liquid forms an aerosol to escape. Electrode ends 4 are also provided at both ends of one side of the heating resistor layer 3. The electrode end 4 is used to electrically connect to the positive and negative electrodes of the power supply respectively. In this embodiment, the electrode end 4 is the electrode layer 4, and the electrode layer 4 is arranged between the porous ceramic layer 2 and the heating resistor layer 3.

[0026] As shown in Figure 4, in order to ensure that the buffer layer 1 has better liquid permeability and air permeability than the porous ceramic layer 2, the thickness of the buffer layer 1 is less than or equal to the thickness of the porous ceramic layer 2. In this embodiment, preferably, the thickness of the buffer layer 1 is set to 0.5mm~2.0mm, and the thickness of the porous ceramic layer 2 is set to 1.0mm~2.5mm.

[0027] As shown in Figure 4, the buffer layer 1 is completely covered on the surface of the porous ceramic layer 2, and at least one side of the edge of the buffer layer 1 exceeds the edge of the same side of the porous ceramic layer 2. In this embodiment, the distance a between the edge of one side of the buffer layer 1 and the edge of the same side of the porous ceramic layer 2 is preferably set to 0.1mm~1.2mm. This distance is conducive to gas flow but has a certain hindrance to liquid flow.

[0028] As shown in Figure 5, the electronic cigarette atomizer core of the present invention is installed in an electronic cigarette atomizer. The electronic cigarette atomizer is provided with an atomizer seat, which has a vertically extending cavity. The electronic cigarette atomizer core is entirely installed in the cavity. The outer wall of the electronic cigarette atomizer core abuts the inner wall 5 of the cavity. The electronic cigarette atomizer core divides the cavity into an upper cavity 50 and a lower cavity 51. The upper cavity 50 is connected to the liquid storage chamber of the electronic cigarette, and the lower cavity 51 constitutes the atomization cavity. The outer wall of the buffer layer 1 of the electronic cigarette atomizer core abuts the inner wall 5 of the cavity, while the outer wall of the porous ceramic layer 2 has a gap 52 with the inner wall 5 of the cavity. The width of the gap 52 is the aforementioned spacing a. When the atomizer core is working, the atomized liquid in the liquid storage chamber is adsorbed and penetrated by the buffer layer 1 through the upper chamber 50, and then conducted to the porous ceramic layer 2. The atomized liquid further penetrates and conducts to the lower surface of the porous ceramic layer 2, and then is evaporated and atomized into aerosol or electronic cigarette smoke under the heating of the heating resistor layer 3. The aerosol is emitted downward through the through holes or gaps in the heating resistor layer 3 to the lower chamber 51, i.e., the atomizer chamber.

[0029] During the operation of the atomizer, when the user inhales the electronic cigarette smoke, a certain negative pressure will be generated in the atomization chamber to facilitate the suction of the smoke or airflow. As the atomized liquid in the liquid storage chamber is consumed, the liquid storage chamber also accumulates a certain negative pressure, which is difficult to eliminate when the liquid storage chamber is well sealed. In the atomizer core of the present invention, since one side edge of the buffer layer 1 is provided with a spacing a beyond the same side edge of the porous ceramic layer 2, so as to form the above-mentioned gap 52, when a certain negative pressure is generated in the liquid storage chamber, the gas in the atomization chamber 51 can flow upward through the gap 52. Since the buffer layer 1 has a large porosity, the air can further penetrate the gaps or pores and holes in the buffer layer 1 and slowly pass upward to reach the liquid storage chamber. Therefore, the negative pressure in the liquid storage chamber can be eliminated, thereby preventing the atomizer core from being insufficiently supplied due to the negative pressure in the liquid storage chamber when working, and preventing the porous ceramic layer from being dry-burned, causing it to burn, damage, and produce a burnt smell. As shown by the continuous arrows on the left and right sides of Figure 5, the direction of air flow through the gap 52 and the gaps or pores inside the buffer layer 1.

[0030] When the electronic cigarette atomizer core is not working, the buffer layer 1 covers the gap 52. The buffer layer 1 absorbs the atomized liquid, causing the atomized liquid inside to have a certain tension in the gaps, pores, and holes. The gap 52, that is, the spacing a, is preferably set to 0.1mm to 1.2mm. This spacing is conducive to gas flow but has a certain obstruction to liquid flow. Therefore, when the pressure difference between the inside and outside of the liquid storage chamber is balanced, the atomized liquid will not leak downward.

[0031] The porous ceramic layer of the present invention is an integrated rectangular parallelepiped design, and there is no liquid guide groove, liquid guide hole or air flow hole in the middle, so that the porous ceramic layer is easy to produce and improve the yield rate, and it is not easy to crack during high temperature operation, so that the atomizer core is not prone to malfunction. The present invention is closely provided with a buffer layer on the porous ceramic layer, so that the upper surface of the porous ceramic layer is not directly in contact with the atomized liquid in the liquid storage chamber, playing a certain spacing and buffering role. The atomized liquid is first adsorbed by the buffer layer, and the atomized liquid in the buffer layer can completely infiltrate the upper surface of the porous ceramic layer, ensuring sufficient liquid supply, and will not over-penetrate and cause excessive liquid supply and leakage. When the atomizer shakes or the amount of atomized liquid is small, the buffer layer can also first absorb and store a sufficient amount of residual atomized liquid, and continue to supply the porous ceramic layer well to ensure sufficient and stable atomization.

[0032] As shown in FIG6 , in other embodiments, in order to make the buffer layer 1 have better liquid permeability and air permeability, a through hole 10 may be provided through the middle of the buffer layer 1 . Furthermore, there may be multiple through holes 10 .

[0033] As shown in Figures 1 to 4, in this embodiment, the electrode layer 4 is a metal conductive film, and the heating resistor layer 3 is a porous metal heating film. The electrode layer 4 and the heating resistor layer 3 are respectively formed on the surface of the porous ceramic layer 2 by different conductive metal materials through a physical vapor deposition process or a magnetron sputtering process. The resistance of the electrode layer 4 is much smaller than that of the heating resistor layer 3. The electrode layer 4 is used for conducting electricity but not for generating heat, while the heating resistor layer 3 can generate heat after being energized. When the metal heating film is formed on the surface of the porous ceramic layer 2 by magnetron sputtering, its thickness is micron-level. The holes on the surface of the porous ceramic layer 2 cannot be covered, so the metal heating film naturally forms straight-through pores, which allow the atomized liquid on the surface of the porous ceramic layer 2 to be heated and evaporated to form a mist that escapes and is dispersed into the atomization chamber.

[0034] In this embodiment, in order to ensure that the buffer layer 1 has good liquid permeability and air permeability while having the functions of adsorption, spacing, and buffering the atomized liquid, the buffer layer 1 is a soft body and is composed of an organic cotton material. In other embodiments, the buffer layer 1 can also be composed of a foam metal material, a polymer porous material, an organic cotton material, a linen cotton material, a non-woven fabric material, or a plant fiber material.

[0035] In other embodiments, the heating resistor layer 3 may also be composed of a metal heating mesh or a porous metal heating sheet. Industrial Applicability

[0036] The above descriptions are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. An electronic cigarette atomizer core, characterized in that: It includes a buffer layer, a porous ceramic layer and a heating resistor layer which are stacked in sequence and tightly connected. The buffer layer and the porous ceramic layer are provided with many non-through tiny gaps or tiny pores as a whole to absorb, penetrate and conduct the atomized liquid. The porosity of the buffer layer is greater than that of the porous ceramic layer. The heating resistor layer is provided with a number of through holes or gaps to allow the heated and evaporated atomized liquid to form a mist to escape. Both ends of one side of the heating resistor layer are also connected with electrode ends, which are used to be electrically connected to the positive and negative electrodes of a power source respectively.

2. The electronic cigarette atomizer core according to claim 1, characterized in that: The electrode end is an electrode layer, and the electrode layer is arranged between the porous ceramic layer and the heating resistor layer.

3. The electronic cigarette atomizer core according to claim 1, characterized in that: The buffer layer completely covers the surface of the porous ceramic layer, and at least one edge of the buffer layer exceeds the edge of the same side of the porous ceramic layer.

4. The electronic cigarette atomizer core according to claim 1, characterized in that: The distance between the edge of one side of the buffer layer and the edge of the same side of the porous ceramic layer is set to 0.1 mm to 1.2 mm.

5. The electronic cigarette atomizer core according to claim 1, characterized in that: The thickness of the buffer layer is less than or equal to the thickness of the porous ceramic layer.

6. The electronic cigarette atomizer core according to claim 1, characterized in that: The thickness of the buffer layer is set to 0.5 mm to 2.0 mm, and the thickness of the porous ceramic layer is set to 1.0 mm to 2.5 mm.

7. The electronic cigarette atomizer core according to claim 1, characterized in that: At least one through hole is provided through the middle of the buffer layer.

8. The electronic cigarette atomizer core according to claim 1, characterized in that: The heating resistor layer is composed of a porous metal heating film, a metal heating mesh or a porous metal heating sheet.

9. The electronic cigarette atomizer core according to claim 2, characterized in that: The electrode layer and the heating resistor layer are respectively formed on the surface of the porous ceramic layer from different conductive metal materials through a physical vapor deposition process, and the resistance of the electrode layer is much smaller than that of the heating resistor layer.

10. The electronic cigarette atomizer core according to claim 1, characterized in that: The buffer layer is a soft body and is composed of foam metal material, polymer porous material, organic cotton material, linen cotton material, non-woven fabric material or plant fiber material.

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