Atomizing core, atomizer and electronic atomization device

Abstract

The present application relates to an atomizing core, an atomizer and an electronic atomizing device. The atomizing core comprises a substrate having an atomizing surface, the substrate being used for storing and conducting liquid; a heating body comprising a heating portion attached to the substrate, the heating portion being capable of generating heat to atomize the liquid on the atomizing surface into smoke; and a protective layer arranged on the atomizing surface and covering the heating portion, the smoke being capable of overflowing from the protective layer. By arranging the protective layer, most of the liquid particles and solid particles in the smoke flowing back to the atomizing core will be directly adsorbed in the protective layer, so that the protective layer has good filtering function, avoiding the flow of the liquid particles and solid particles to the atomizing surface to form the tar gathered on the surface and around the heating portion, thereby greatly reducing the proportion of the liquid particles and solid particles in the smoke for conversion into the tar, and further reducing the amount of the tar gathered on the surface and around the heating portion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of atomization technology, in particular to an atomizing core, an atomizer and an electronic atomization device comprising the atomizer. BACKGROUND

[0002] Electronic atomization devices have similar appearance and taste as ordinary cigarettes, but generally do not contain tar, suspended particles and other harmful components in cigarettes, so electronic atomization devices are commonly used as substitutes for cigarettes. Electronic atomization devices generally comprise an atomizer, which comprises an atomizing core, the atomizing core comprising a base and a heating body, the base plugging a liquid storage cavity in the atomizer and being capable of buffering and conducting liquid in the liquid storage cavity, and the heating body being arranged on the base and being used for atomizing the liquid conducted to the base to form smoke for users to smoke. However, for the conventional atomizer, tar will accumulate on the surface and around the heating body, and as the tar continues to accumulate, it will cause the formation of a burnt taste or other odors in the smoke, thereby affecting the user experience. SUMMARY

[0003] One of the technical problems solved by the present application is how to prevent tar from accumulating on the surface and around the heating body.

[0004] An atomizing core comprises:

[0005] a base having an atomizing surface, the base being used for buffering and conducting liquid;

[0006] a heating body comprising a heating portion attached to the base, the heating portion being capable of generating heat to atomize liquid on the atomizing surface to form smoke; and

[0007] a protective layer arranged on the atomizing surface and covering the heating portion, the smoke being capable of overflowing from the protective layer.

[0008] In one of the embodiments, the protective layer has micropores formed therein and a porosity of 30% to 70%, and the thickness of the protective layer is 100 μm to 500 μm.

[0009] In one of the embodiments, the heating body further comprises an electrode portion for conducting electricity, the electrode portion being electrically connected to the heating portion, and the protective layer further covers the entire electrode portion.

[0010] In one of the embodiments, the protective layer has a covering surface arranged towards the atomizing surface, the covering surface is recessed to form a groove, and at least a portion of the heating portion is matched with the groove.

[0011] In one of the embodiments, the heating portion is in a line-like structure or a diaphragm-like structure, and when in the diaphragm-like structure, the thickness of the heating portion is 30 μm to 130 μm.

[0012] In one of the embodiments, the substrate has micropores and a porosity of 20% to 70%, and the substrate has a thickness of 2 mm to 5 mm.

[0013] An atomizing core, comprising:

[0014] A substrate having an atomizing surface, the substrate being used to store and conduct liquid;

[0015] A heating element including a heating portion attached to the substrate, the heating portion being capable of generating heat to atomize liquid on the atomizing surface into smoke; and

[0016] A protective layer disposed on the atomizing surface, the protective layer having a bottom surface disposed away from the atomizing surface, the bottom surface having a through slot penetrating the protective layer, at least part of the heating portion being located in the through slot, and a surface of the heating portion located in the through slot being kept a certain distance from the bottom surface along a thickness direction of the protective layer.

[0017] In one of the embodiments, the protective layer has a covering surface disposed away from the bottom surface to cover the atomizing surface, and the protective layer further has a ventilation hole penetrating the covering surface and communicating with the outside, smoke being able to overflow from the ventilation hole.

[0018] In one of the embodiments, the ventilation hole forms a through opening on the covering surface, the through opening having a direct projection on the atomizing surface, and the direct projection being kept a certain distance from a coverage range of the heating portion.

[0019] In one of the embodiments, the ventilation hole has a direct projection on the atomizing surface, and the direct projection is kept a certain distance from a coverage range of the heating portion.

[0020] In one of the embodiments, a central axis of the ventilation hole is disposed at an acute angle with the atomizing surface; or the ventilation hole includes a first bending section and a second bending section in communication with each other, the first bending section penetrating the covering surface, the second bending section directly communicating with the outside, a central axis of the first bending section being disposed at an angle with the atomizing surface, and a central axis of the second bending section being disposed at an angle with the central axis of the first bending section.

[0021] An atomizer having a liquid storage cavity and comprising the atomizing core according to any one of the above embodiments, the substrate further having a liquid suction surface opposite to the atomizing surface, the liquid suction surface being used to suck liquid in the liquid storage cavity into the substrate.

[0022] An electronic atomizing device, comprising a power supply and the atomizer, the power supply and the heating element being electrically connected.

[0023] One technical effect of one embodiment of the present application is that by setting the protective layer, most of the liquid particles and solid particles in the smoke flowing back to the atomizing core will be directly adsorbed in the protective layer, so that the protective layer has good filtering function, avoiding the flow of the part of liquid particles and solid particles to the atomizing surface to form smoke gathered on the surface and around the heating part, thereby greatly reducing the proportion of liquid particles and solid particles in the smoke for conversion into smoke, and further reducing the amount of smoke gathered on the surface and around the heating part. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A cross-sectional structure schematic diagram of an atomizer provided for an embodiment is shown in the figure;

[0025] Figure 2 A three-dimensional structure schematic diagram of an atomizing core provided for the first embodiment in the atomizer shown in the figure is shown in the figure; Figure 1

[0026] Figure 3 A three-dimensional structure schematic diagram of a heating body in the atomizing core shown in the figure is shown in the figure; Figure 2

[0027] Figure 4 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 2

[0028] Figure 5 A three-dimensional structure schematic diagram of a heating body in the atomizing core shown in the figure is shown in the figure; Figure 2

[0029] Figure 6 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 1

[0030] Figure 7 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 6

[0031] Figure 8 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 6

[0032] Figure 9 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 6

[0033] Figure 10 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure;

[0034] Figure 11 A three-dimensional structure schematic diagram of the atomizing core provided for the second embodiment in the atomizer shown in the figure is shown in the figure; Figure 10

[0035] ​​​​​​​​​Figure 12 As shown in the plane cross-sectional structure schematic view of the atomizing core; Figure 10 As shown in the plane cross-sectional structure schematic view of the atomizing core;

[0036] Figure 13 As shown in the plane cross-sectional structure schematic view of the atomizing core; Figure 10 As shown in the plane cross-sectional structure schematic view of the atomizing core. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "inner", "outer", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0039] Referring to Figure 1 , the atomizer 10 provided by an embodiment of the present application is provided with a liquid storage cavity 11 and an airflow passage 12, and the liquid storage cavity 11 and the airflow passage 12 are isolated from each other and not connected to each other. The liquid storage cavity 11 is used to store an aerosol generating substrate represented by a liquid, and when the liquid is atomized to form smoke (aerosol), the smoke will be discharged into the airflow passage 12 for the user to inhale. The atomizer 10 includes an atomizing core 20, and the atomizing core 20 includes a substrate 100, a heating body 200, and a protective layer 300. A large number of micropores are formed inside the substrate 100, and due to the existence of the micropores, the substrate 100 has a certain porosity, and the porosity can be positioned as the total volume of the micropores accounting for a percentage of the volume of the entire substrate 100. The porosity can be taken in the range of 20% to 70%, for example, and the specific value thereof can be 20%, 30%, 60%, or 70%, etc. In view of the fact that the substrate 100 has a certain porosity, the substrate 100 can produce a capillary effect to absorb and conduct the liquid, that is, the substrate 100 can have a certain buffering and conducting effect on the liquid.

[0040] Referring to Figure 2 , Figure 3 and Figure 4The base 100 has an atomization surface 110 and a liquid suction surface 120, both of which are oppositely oriented, and the liquid suction surface 120 is used to suck the liquid in the liquid storage cavity 11 into the base 100. For example, the base 100 directly seals against the liquid storage cavity 11, so that the liquid suction surface 120 defines part of the boundary of the liquid storage cavity 11, and the liquid in the liquid storage cavity 11 will be directly contacted by the liquid suction surface 120. Through the capillary action of the micropores in the base 100, the liquid in the liquid storage cavity 11 will enter the inside of the base 100 through the liquid suction surface 120 and be conducted to the atomization surface 110. The conduction speed of the liquid in the base 100 is proportional to the porosity, so the conduction speed of the liquid can be changed by changing the porosity of the base 100. The thickness H1 of the base 100 ranges from 2 mm to 5 mm, and the thickness of the base 100 can be defined as the distance between the liquid suction surface 120 and the atomization surface 110. The thickness of the base 100 can be 2 mm, 3 mm, 4 mm or 5 mm. The base 100 can be made of ceramic or glass material. Ceramic and glass materials have relatively stable chemical properties, which can prevent the base 100 from chemically reacting at high temperatures to form toxic gases, avoid the user from inhaling the toxic gases carried by the smoke, and ensure the safety of the use of the atomizer 10.

[0041] Referring to Figure 3 and Figure 5 In some embodiments, the heating body 200 includes a heating portion 210 and an electrode portion 220, and the number of electrode portions 220 can be two. One of the electrode portions 220 can be used as a positive electrode and electrically connected to one end of the heating portion 210, and the other electrode portion 220 can be used as a negative electrode and electrically connected to the other end of the heating portion 210. The resistance of the electrode portion 220 is much smaller than the resistance of the heating portion 210, so that the electrode portion 220 has excellent electrical conductivity. Since the electrode portion 220 and the heating portion 210 are used in series, when the entire heating body 200 is powered, the heating portion 210 can generate a large amount of heat, and the heat generated on the electrode portion 220 can be relatively negligible.

[0042] The heating portion 210 can be arranged on the base body 100 by means of silk printing. For example, the heating portion 210 can be directly attached to the atomization face 110, so that the heating portion 210 protrudes from the atomization face 110 by a certain height. For another example, a portion of the atomization face 110 is recessed to form a sunken groove, and the heating portion 210 cooperates with the sunken groove, so that the surface of the heating portion 210 is flush with the non-recessed portion of the atomization face 110. Of course, the arrangement of the electrode portion 220 on the base body 100 can be the same as that of the heating portion 210. In terms of material, the heating portion 210 can be made of a metal material. In terms of structure, the heating portion 210 can be in a line-shaped structure or a membrane-shaped structure. When the heating portion 210 is in a membrane-shaped structure, the heating portion 210 can be a dense metal film or a porous metal film, etc. The thickness H3 of the membrane-shaped heating portion 210 can be in a range from 30 μm to 130 μm, for example, the thickness H3 can be 30 μm, 50 μm, 100 μm or 130 μm, etc. The electrode portion 220 can also be in a line-shaped structure or a membrane-shaped structure.

[0043] Referring to Figure 2 , Figure 3 and Figure 4 , in some embodiments, the protective layer 300 can be in a membrane-shaped structure. The protective layer 300 is a porous ceramic layer made of a porous ceramic material, so that a large number of micropores are formed in the protective layer 300, and the protective layer 300 also has a certain porosity, which can be in a range from 30% to 70%, for example, the porosity can be 30%, 40%, 60% or 70%, etc. The protective layer 300 is arranged on the atomization face 110, so that the protective layer 300 covers all the heating portions 210, and the protective layer 300 protects the heating portions 210. When the heating portions 210 are powered, the heating portions 210 convert electrical energy into heat energy, and the liquid on the atomization face 110 absorbs heat and is atomized to form smoke. Since the protective layer 300 has a certain porosity, the smoke generated on the atomization face 110 will overflow from the micropores in the protective layer 300 to the outside of the protective layer 300, and finally be transmitted to the airflow channel 12 to be inhaled by the user. The amount of smoke overflowing from the protective layer 300 per unit time is proportional to the porosity of the protective layer 300, therefore, by changing the porosity of the protective layer 300 to change the amount of smoke, for example, when the porosity of the protective layer 300 is large, the demand for large amount of smoke can be met.

[0044] When the user stops puffing, the pressure at the position of the entire atomization core 20 is relatively small, so that the smoke containing solid particles and liquid particles flows back to the atomization core 20. If the protective layer 300 is not provided, most of the liquid particles and solid particles in the smoke will flow directly to the atomization surface 110 without any obstruction, thereby forming a tar that is accumulated on the surface and around the heating portion 210, i.e., the tar covers or surrounds the periphery of the heating portion 210. Obviously, the tar will be in direct connection with the heating portion 210. Therefore, the surface and the surrounding of the heating portion 210 will accumulate a large amount of tar in a short time. When the heating portion 210 generates heat, the surface and the surrounding of the heating portion 210 have a relatively high temperature, and the tar will generate a gas with a burnt smell, a pungent smell or other odors at a high temperature. The gas will be mixed in the smoke and inhaled by the user, thereby affecting the taste of the smoke and the user experience. Of course, the tar will also produce a certain amount of toxic gas, thereby affecting the health of the human body.

[0045] The above embodiment provides the protective layer 300, so that most of the liquid particles and solid particles in the smoke are directly adsorbed in the protective layer 300, so that the protective layer 300 has a good filtering function, avoiding the flow of the liquid particles and the solid particles to the atomization surface 110 to form a tar accumulated on the surface and around the heating portion 210, thereby greatly reducing the proportion of the liquid particles and the solid particles in the smoke that are converted into the tar, and further reducing the amount of the tar accumulated on the surface and around the heating portion 210 due to a single puff. Therefore, in the same time period, the accumulation amount and the accumulation speed of the tar on the surface and around the heating portion 210 will be greatly reduced. When the accumulation amount of the tar is less than a certain value, the tar cannot generate a gas with a burnt smell, a pungent smell or other odors that affect the taste of the smoke at a high temperature, thereby ensuring the taste of the smoke and the user experience. At the same time, the tar can also avoid generating toxic gas, thereby improving the safety during use of the atomizer 10.

[0046] In fact, the liquid in the liquid storage cavity 11 usually contains essence, and even nicotine salt can be added. When the liquid is atomized by absorbing heat, the essence will be decomposed to obtain a high molecular compound, and the nicotine salt will produce a carbonate. The high molecular compound and the carbonate will have a catalytic effect, which will make more liquid particles and solid particles in the smoke quickly converted into the tar, i.e., increase the conversion rate of the tar, thereby further accelerating the accumulation speed of the tar. However, the above embodiment provides the protective layer 300, which can fully play its absorption and filtering functions. Not only can the protective layer 300 obstruct the flow of the liquid particles and the solid particles, but also the ceramic material used in the protective layer 300 can increase the absorption function of the high molecular compound and the carbonate, thereby reducing the catalytic effect in the formation process of the tar, and further reducing the accumulation amount of the tar.

[0047] At the same time, by setting the protective layer 300, the protective layer 300 and the base body 100 can form a certain clamping effect on the heating part. The protective layer 300 can absorb external impact energy to avoid the external impact force directly acting on the heating part, thereby reducing the counteraction of the external impact force and the thermal stress generated in the heating process on the adhesion of the heating part, preventing the heating part from falling off the base body 100, and improving the stable reliability of the heating part fixed on the base body 100. In addition, the protective layer 300 can also play a certain absorption and buffering effect on the liquid leakage from the base body 100, preventing the entire atomizing core 20 from forming liquid leakage in a short period of time, and improving the leakage prevention performance of the atomizing core 20.

[0048] In some embodiments, the protective layer 300 can further cover the electrode part 220 of the heating element 200, for example, the protective layer 300 can cover all the electrode part 220. By covering the electrode part 220, the protective layer 300 can form a protective effect on the electrode part 220, reduce the counteraction of the external impact force and the thermal stress on the adhesion of the electrode part 220, prevent the electrode part 220 from falling off the base body 100, and improve the stable reliability of the electrode part 220 fixed on the base body 100.

[0049] The protective layer 300 has a certain thickness H2, and the thickness H2 is in the range of 100 μm to 500 μm, for example, the specific value can be 100 μm, 200 μm, 300 μm or 500 μm, etc. When the thickness of the protective layer 300 increases, the flow resistance of the liquid particle and solid particle flow in the micropore and the flow path to the atomizing surface 110 can be increased, thereby increasing the absorption effect of the protective layer 300 on the liquid particle, solid particle flow, high molecular compound and carbonate, and reducing the focusing amount of the smoke. Of course, when the thickness of the protective layer 300 is large, the volume of the protective layer 300 increases, which can increase the buffering amount of the protective layer 300 to the liquid leakage from the base body 100, and improve the leakage prevention performance of the atomizing core 20.

[0050] Referring to Figure 6 , Figure 7 and Figure 8In some embodiments, the protective layer 300 has a cover surface 310 and a bottom surface 320, both of which are oppositely directed and spaced apart along the thickness direction of the protective layer 300, the cover surface 310 being directed toward the atomization surface 110 of the base body 100, and the bottom surface 320 being directed away from the atomization surface 110. When the protective layer 300 is arranged on the atomization surface 110, the cover surface 310 will form a covering effect on the heat-generating portion 210. The protective layer 300 is internally provided with a ventilation hole 330, one end of which penetrates through the cover surface 310, and the other end of which penetrates through the bottom surface 320 and is in communication with the outside. Obviously, for the atomizer 20 that has been installed in the atomizer 10, the ventilation hole 330 is in communication with the airflow passage 12 (see Figure 1 By arranging the ventilation hole 330, since the aperture of the ventilation hole 330 is several orders of magnitude higher than that of the micropores, the flow resistance of the smoke passing through the protective layer 300 into the airflow passage 12 can be reduced. Specifically, the flow resistance of the smoke in the ventilation hole 330 is significantly smaller than that in the micropores. When the heat-generating portion 210 atomizes the liquid on the atomization surface 110 to form smoke, in addition to a small part of the smoke being discharged into the airflow passage 12 through the micropores in the protective layer 300, most of the smoke will be able to quickly discharge into the airflow passage 12 through the ventilation hole 330, ensuring that a sufficient amount of smoke enters the airflow passage 12 per unit time to be inhaled by the user, so as to ensure that the amount of smoke discharged by the atomizer 20 into the airflow passage 12 per unit time can meet the user's demand.

[0051] In some embodiments, for example, the ventilation hole 330 forms a penetration opening 333 on the cover surface 310, the penetration opening 333 has a projection on the atomization surface 110, and the projection maintains a set distance B from the coverage range of the heat-generating portion 210. When the user stops inhaling, the smoke flowing back to the atomizer 20 can also enter the interior of the protective layer 300 through the ventilation hole 330 and flow toward the atomization surface 110. Since the penetration opening 333 maintains a set distance B from the coverage range of the heat-generating portion 210 on the atomization surface 110, the smoke flowing back into the ventilation hole 330 will form a smoke plume on the atomization surface 110 close to the penetration opening 333. The smoke plume is not directly connected to the heat-generating portion 210 and maintains a set distance from the heat-generating portion 210. Since the smoke plume is located far away from the heat-generating portion 210 and has a small amount of aggregation, it is difficult for the smoke plume to form a high temperature and a sufficient amount of substances required for a smoke plume chemical reaction, so the smoke plume will be difficult to produce gas with a burnt smell or other odors. For another example, the entire ventilation hole 330 has a projection on the atomization surface 110, and the projection maintains a set distance from the coverage range of the heat-generating portion 210, so that the smoke entering the ventilation hole 330 is difficult to reach the surface or the surrounding of the heat-generating portion 210 through the micropores in the protective layer 300, further preventing the smoke from forming a smoke plume on the surface or the surrounding of the heat-generating portion 210.

[0052] Referring to Figure 8, the central axis of the vent hole 330 can be linear, and the central axis of the vent hole 330 is arranged at an acute angle A with the atomization face 110, that is, the vent hole 330 is arranged obliquely relative to the atomization face 110, so that the total extension length of the vent hole 330 can be appropriately increased, thereby prolonging the flow path of the smoke in the vent hole 330 and increasing the contact area with the protective layer 300, resulting in increased flow resistance of the smoke and increased adsorption capacity of the protective layer 300 to the smoke, thereby avoiding the formation of smoke on the atomization face 110. Figure 9 , the central axis of the vent hole 330 can be linear, and the central axis of the vent hole 330 is arranged at an acute angle A with the atomization face 110, that is, the vent hole 330 is arranged obliquely relative to the atomization face 110, so that the total extension length of the vent hole 330 can be appropriately increased, thereby prolonging the flow path of the smoke in the vent hole 330 and increasing the contact area with the protective layer 300, resulting in increased flow resistance of the smoke and increased adsorption capacity of the protective layer 300 to the smoke, thereby avoiding the formation of smoke on the atomization face 110.

[0053] The cover face 310 of the protective layer 300 is recessed to form a groove 340, and at least a portion of the heating portion 210 can cooperate with the groove 340, so that the heating portion 210 can make full use of the installation space of the groove 340, so that the atomization core 20 is compact in structure, and at the same time, the groove 340 also forms a limiting action on the heating portion 210, improving the stability and reliability of the installation of the heating portion 210.

[0054] Referring to Figure 10 , Figure 11 and Figure 12In other embodiments, the protective layer 300 may not completely cover the heating element 210. Specifically, a through groove 350 extending through the entire protective layer 300 is formed within the protective layer 300. One end of the through groove 350 penetrates the bottom surface 320, and the other end penetrates the covering surface 310. When the protective layer 300 is fixed on the atomizing surface 110, the cross-sectional shape of the heating element 210 is adapted to the cross-sectional shape of the through groove 350, so that the heating element 210 is located in the through groove 350 and cooperates with the through groove 350. Along the thickness direction of the protective layer 300, a set distance H4 is maintained between the surface of the heating element 210 located in the through groove 350 and the bottom surface 320 of the protective layer 300. In fact, the protective layer 300 is arranged around the edge of the heating element 210. Due to the obstructive effect of the protective layer 300, the smoke from the returning atomizing core 20 is difficult to reach the part of the atomizing surface 110 near the heating element 210 through the micropores of the protective layer 300, thereby significantly reducing the amount of smoke accumulation around the heating element 210. At the same time, the protective layer 300 has a side wall surface 360 ​​that defines the boundary of the through groove 350. Since the surface of the heating element 210 located in the through groove 350 maintains a set distance H4 between it and the bottom surface 320 of the protective layer 300, the side wall surface 360 ​​has a sufficiently large area. During the process of the returning smoke flowing from the through groove 350 to the heating element 210, the smoke will collide and contact with the side wall surface 360. This side wall surface 360 ​​has a strong adsorption capacity for the smoke due to its reasonable contact area, making it difficult for the smoke to reach the surface of the heating element 210. This prevents the smoke from forming a large amount of smoke on the surface of the heating element 210, and also ensures the taste of the smoke. Of course, the protective layer 300 can also partially cover the heating element 210, so that the user can only observe a part of the heating element 210 through the through groove 350 outside the atomizing core 20.

[0055] See Figure 13 Referring to the aforementioned arrangement of the vent 330, the through groove 350 can also be inclined relative to the atomizing surface 110, that is, when the through groove 350 penetrates the protective layer 330 in a straight line, the extension direction of the straight line forms an acute angle with the atomizing surface 110. Of course, the through groove 350 can also penetrate the protective layer 330 along a broken line. Both of these arrangements can extend the flow path of the smoke in the through groove 350 and increase the contact area with the protective layer 300, thereby increasing the flow resistance of the smoke and increasing the adsorption capacity of the protective layer 300 for the smoke, reducing the formation of soot on the heating element 220. The smoke generated on the atomizing surface 110 can be quickly discharged from the through groove 350 into the airflow channel 12 (see...). Figure 1), to ensure that the amount of smoke emitted by the atomizing core 20 to the airflow channel 12 per unit time can meet the user's demand. In addition to the through groove 350, the ventilation hole 330 can also be provided on the protective layer 300 according to the above-mentioned embodiments. By providing the ventilation hole 330, the amount of smoke emitted by the atomizing core 20 to the airflow channel 12 per unit time can be further improved.

[0056] The present application also provides an electronic atomization device, which comprises a power supply, a controller, a sensor and the above-mentioned atomizer 10. The power supply is electrically connected with the controller and the heating body 200. When the sensor obtains the user's puffing information and transmits the puffing information to the controller, the controller controls the power supply to supply power to the heating body 200. The heating body 200 converts the electric energy into heat energy, so that the liquid is atomized to form smoke under the action of the heat energy. The above-mentioned puffing information can be the negative pressure generated in the airflow channel 12 during the user's puffing process. The electronic atomization device comprising the above-mentioned atomizer 10 can protect the taste and safety of the smoke generated by the electronic atomization device.

[0057] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0058] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed. However, it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An atomizing core, characterized in that, The application relates to an atomizing core. The atomizing core comprises: a base body having an atomizing surface, the base body being used for buffering and conducting liquid; a heating body comprising a heating part attached to the base body, the heating part being capable of generating heat to atomize liquid on the atomizing surface into smoke; and a protective layer arranged on the atomizing surface, the protective layer having a bottom surface arranged away from the atomizing surface, the bottom surface being provided with a through groove penetrating through the protective layer, at least part of the heating part being located in the through groove, and the surface of the heating part in the through groove being kept a certain distance from the bottom surface along the thickness direction of the protective layer; the protective layer has a covering surface arranged away from the bottom surface to cover the atomizing surface, the protective layer is further provided with a ventilation hole penetrating through the covering surface and communicating with the outside, and smoke can overflow from the ventilation hole; the protective layer is a porous ceramic layer made of porous ceramic material; 2. The atomizer core of claim 1, wherein, the ventilation hole forms a through hole on the covering surface, the through hole has a projection on the atomizing surface, and the projection is kept a certain distance from the covering range of the heating part.

3. The atomizer core of claim 1, wherein, The central axis of the ventilation hole is arranged at an acute angle with the atomizing surface.

4. The atomizer core of claim 1, wherein, The base body is made of ceramic material.

5. The atomizer core of claim 1, wherein, The base body is made of glass material.

6. The atomizer core of claim 1, wherein, The ventilation hole comprises a first bending section and a second bending section which are in communication with each other, the first bending section penetrates through the covering surface, the second bending section directly communicates with the outside, the central axis of the first bending section is arranged at an angle with the atomizing surface, and the central axis of the second bending section is arranged at an angle with the central axis of the first bending section.

7. The atomizer core of claim 1, wherein, The protective layer is provided with micropores and has a porosity of 30% to 70%, and the thickness of the protective layer is 100 mu m to 500 mu m.

8. The atomizer core of claim 1, wherein, The heating part is in a line structure or a diaphragm structure; when the heating part is in a diaphragm structure, the thickness of the heating part is 30 mu m to 130 mu m.

9. The atomizer core of claim 1, wherein, The base body is provided with micropores and has a porosity of 20% to 70%, and the thickness of the base body is 2 mm to 5 mm.

10. An atomizer characterized by, The heating body further comprises an electrode part used for conducting electricity, and the electrode part is electrically connected with the heating part.

11. An electronic atomizing device, characterized by, A liquid storage cavity is arranged, and the atomizing core comprises any one of the atomizing cores in claims 1 to 9, the base body further has a liquid suction surface opposite to the atomizing surface, and the liquid suction surface is used for sucking liquid in the liquid storage cavity into the base body. The application further relates to a power supply and the atomizer in claim 10, and the power supply and the heating body are electrically connected.

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