Atomizing core and atomizer

Abstract

The utility model provides an atomizing core and an atomizer. The atomizing core comprises a porous base body and a heating piece. The porous substrate is provided with a first surface and a second surface which are opposite, and an air duct penetrating through the first surface and the second surface; the heating element comprises a heating main body arranged on the first surface; wherein the heating main body comprises a first heating section and two electrode parts; the first heating section is connected between the two electrode parts and distributed in the circumferential direction of the air duct. The first heating section at least comprises two heating lines which are arranged in parallel at intervals in the radial direction of the first surface. By means of the arrangement, a non-whole-circle heating track is formed, the heating circuit of the heating body is arranged in a concentrated mode, heat generated when the heating body works is more concentrated, and therefore the atomization speed is increased, and the problem that in the prior art, the atomization speed of an annular atomization core of an atomizer is low is solved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomizers, and in particular to an atomizer core and an atomizer. Background Art

[0002] Atomizers are common electronic products. They typically form an aerosol by absorbing aerosol into a matrix and heating it. The airway then expel the aerosol and delivers it to the user. The atomizer core typically consists of a porous matrix and a heating element. In electronic atomizer technology, annular atomizer cores have emerged to improve on the shortcomings of rectangular atomizer cores in terms of aerosol transport efficiency, condensate deposition, and the visual impact of condensate.

[0003] The annular atomizer core comprises an annular porous base and an annular heating element. Airflow enters from the outer edge of the bottom surface of the annular heating element, sweeps across the heating surface, and then turns through the central inner hole of the annular heating element and the annular porous base to enter the central airway. However, the annular heating element in the related art has a relatively dispersed atomization area and energy, resulting in a slow atomization speed, or smoke start speed, of the annular atomizer core, which does not meet the design requirements of some atomizer models. Utility Model Content

[0004] In view of this, the present application provides an atomizer core and an atomizer to solve the problem of slow atomization speed of the annular atomizer core of the atomizer in the prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An atomizing core, comprising:

[0007] a porous substrate having a first surface and a second surface opposite to each other, and an air passage extending through the first surface and the second surface;

[0008] A heating element, comprising a heating body disposed on the first surface;

[0009] Wherein, the heating body includes a first heating section and two electrode parts;

[0010] The first heating section is connected between the two electrode portions and distributed along the circumference of the air passage. The first heating section includes at least two heating circuits that are spaced apart and arranged in parallel along the radial direction of the first surface.

[0011] Optionally, the first heating section is divided into a first sub-heating portion and a second sub-heating portion that are alternately distributed in the circumferential direction, and the radial distance between the first sub-heating portion and the air duct is greater than the radial distance between the second sub-heating portion and the air duct.

[0012] Optionally, all the heating circuits are concentric arcs.

[0013] Optionally, the first heating section further includes a connection section connected between the two heating lines, and the connection section is provided at multiple locations;

[0014] Along the radial direction of the first surface, the width of any of the contact segments is the same at all locations or gradually widens from the radial inside to the radial outside.

[0015] Optionally, the heating body further includes a second heating segment connected between the two electrode portions, the second heating segment being distributed along the circumference of the air passage, and the first heating segment and the second heating segment enabling the heating element to have a full circle of heating tracks;

[0016] The heat generated by the first heating section is greater than the heat generated by the second heating section.

[0017] Optionally, a portion of the second heating section protrudes radially inwardly of the air duct, and a portion of the second heating section protrudes radially outwardly of the air duct.

[0018] Optionally, the annular diameter of the first surface is R, the first heating section includes two heating circuits distributed radially inward and outward, the sum of the wire diameters of the two heating circuits is φ, the radial spacing between the two heating circuits is L, and the radial span of the two heating circuits is W, wherein:

[0019] 0<L+φ<W; 1 / 5≤W / R≤11 / 15.

[0020] Optionally, the annular diameter of the first surface is R, the first heating section includes two heating circuits distributed radially inward and outward, and the radial span of the two heating circuits is W, wherein: 1 / 5≤W / R≤11 / 15.

[0021] Optionally, a central angle corresponding to the first heating section on the first surface is 180°-270°.

[0022] An atomizer, comprising: a housing and an atomizing core as described above;

[0023] A liquid storage chamber and an exhaust passage are provided in the shell, the atomizer core is arranged in the shell and is in fluid communication with the liquid storage chamber, and the air passage is in fluid communication with the exhaust passage.

[0024] The atomizer core provided in the present application includes a porous matrix and a heating element; the porous matrix has a first surface and a second surface relative to each other, and an air passage running through the first surface and the second surface; the heating element includes a heating body arranged on the first surface; wherein the heating body includes a first heating section and two electrode parts; the first heating section is connected between the two electrode parts and distributed along the circumference of the air passage, and the first heating section includes at least two heating circuits radially spaced and arranged in parallel along the first surface. With such an arrangement, a non-full circle of heating tracks is formed, and the heating circuits of the heating body are arranged more concentratedly, so that the heat generated by the heating body is more concentrated when working, thereby improving the atomization speed, and solving the problem of slow atomization speed of the annular atomizer core of the atomizer in the prior art. In addition, the multiple heating circuits spaced in parallel make the heating body have a certain radial width, and can also avoid the problem of buried wire when a single heating wire is combined with the porous matrix 11. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 This is a structural diagram of Example 1 of the atomizer core that can increase the atomization speed of the heating element provided in the embodiment of the present application;

[0027] Figure 2 for Figure 1 Schematic diagram of the heating element;

[0028] Figure 3 for Figure 2 Front view of the heating element;

[0029] Figure 4 for Figure 3 Expanded view of the bending claws of the heating element;

[0030] Figure 5 for Figure 1 Schematic diagram of the size markings of the first surface;

[0031] Figure 6 This is a structural diagram of a second embodiment of the atomizer core that can increase the atomization speed of the heating element provided in an embodiment of the present application;

[0032] Figure 7 for Figure 6 Schematic diagram of the heating element;

[0033] Figure 8 for Figure 7Front view of the heating element;

[0034] Figure 9 for Figure 6 Schematic diagram of the size markings of the first surface;

[0035] Figure 10 A schematic structural diagram of the first embodiment of the atomizer core capable of partitioned atomization provided in the embodiments of the present application;

[0036] Figure 11 for Figure 10 Schematic diagram of the heating element;

[0037] Figure 12 for Figure 11 Front view of the heating element;

[0038] Figure 13 A schematic structural diagram of a second embodiment of the atomizer core capable of partitioned atomization provided in an embodiment of the present application;

[0039] Figure 14 for Figure 13 Schematic diagram of the heating element;

[0040] Figure 15 for Figure 14 Front view of the heating element;

[0041] Figure 16 A cross-sectional view of the atomizer core provided in an embodiment of the present application;

[0042] Figure 17 A partial cross-sectional view of the atomizer provided in an embodiment of the present application.

[0043] exist Figures 1-17 middle:

[0044] 1. Atomizer core; 2. Exhaust duct; 3. Liquid storage chamber;

[0045] 11. porous matrix; 12. heating element;

[0046] 111. First surface; 112. Ventilation channel;

[0047] 121, first heating section; 122, second heating section; 125, electrode portion; 126, bending claw;

[0048] 1211. First sub-heating portion; 1212. Second sub-heating portion; 1213. Contact section. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] like Figures 1-17 As shown, the present application provides some embodiments of the atomizer core 1 that can increase the atomization speed of the heating element 12 .

[0051] The embodiment of the present application provides an atomizer core 1, comprising a porous substrate 11 and a heating element 12; the porous substrate 11 can also be called a liquid guide, which is used to absorb aerosol to form a matrix, and the porous substrate 11 has a first surface 111 and a second surface opposite to each other in the axial direction, and an air duct 112 running through the first surface 111 and the second surface, the first surface 111 is the attachment surface of the heating element 12, and the second surface is used to be opposite to and connected to the exhaust duct 2 in the atomizer; the heating element 12 is an electrically heated structure, and the heating element 12 includes a first surface 111 and a second surface 112 provided in the first surface 111 and the second surface. A heating body with a surface 111 includes two electrode portions 125 and a first heating section 121; the two electrode portions 125 are used to be electrically connected to the power supply of the atomizer, and the two electrode portions 125 are dispersed on the first surface 111 of the porous matrix 11; the first heating section 121 is connected between the two electrode portions 125 and is distributed circumferentially along the air passage 112, and the first heating section 121 includes at least two heating circuits that are radially spaced and arranged in parallel along the first surface 111, and the heating circuits are in a parallel relationship.

[0052] Such an arrangement forms a non-full circle heating trajectory, and the heating circuits of the heating body are arranged more centrally, so that the heat generated by the heating body is more concentrated when working, thereby improving the atomization speed, and solving the problem of slow atomization speed of the annular atomization core of the atomizer in the prior art; in addition, the multiple heating circuits arranged in parallel at intervals make the heating body have a certain radial width, and can also avoid the problem of buried wire when a single heating wire is combined with the porous matrix 11.

[0053] It should be noted that the first heating section 121 and the two electrode portions 125 do not form a closed loop, but rather an open ring.

[0054] In the atomizer core 1 provided in the present application, the heating element 12 may include a heating body and a bending claw 126 provided on the heating body, the bending claw 126 is bent relative to the heating body, and the heating body is provided on the first surface 111, such as Figure 16 As shown, the bending claws 126 are embedded in the porous matrix 11 .

[0055] In this arrangement, the heating element 12 is connected to the first surface 111 of the porous matrix 11 and is arranged around the air duct 112, forming a heating surface on the first surface 111 of the porous matrix 11, thereby forming an annular atomization core 1. The bending claws 126 are embedded in the porous matrix 11 to provide a stable and reliable attachment connection for the heating body. The bending claws 126 increase the bonding force between the heating element 12 and the porous matrix 11, preventing the heating element 12 from detaching from the porous matrix 11, thereby solving the problem that the annular atomization core 1 of the atomizer is prone to the annular heating element 12 detaching from the annular porous matrix 11.

[0056] It should be noted that the bending claw 126 and the heating body are integrally formed, and the bending claw 126 is also made of the same heat-conducting material as the heating body so as to bend relative to the heating body. Figure 4 An illustration is provided of the bending jaws 126 before bending.

[0057] In some optional embodiments, multiple dispersed bending claws 126 are provided on both the radially inner and radially outer sides of the heating body. Furthermore, the bending claws 126 are preferably T-shaped, with the ends of the bending claws 126 away from the heating body being wider, which facilitates a tighter connection with the porous substrate 11. Of course, the bending claws 126 may also be configured in straight, curved, or wavy shapes, which are also feasible.

[0058] Based on the above embodiment, the heat concentration can be adjusted by adjusting the distance between the two parallel heating circuits, that is, the explosion degree of the heating element 12 and the atomization speed of the atomizer core 1 can be adjusted.

[0059] When the two parallel heating circuits are closely spaced, in some embodiments, the first heating section 121 is divided into a first sub-heating portion 1211 and a second sub-heating portion 1212 that are alternately distributed in the circumferential direction, and the radial distance between the first sub-heating portion 1211 and the air passage 112 is different from the radial distance between the second sub-heating portion 1212 and the air passage 112. Figure 1-Figure 5 As shown, the first sub-heating portion 1211 is farther away from the air passage 112 than the second sub-heating portion 1212 , that is, the radial distance between the first sub-heating portion 1211 and the air passage 112 is greater than the radial distance between the second sub-heating portion 1212 and the air passage 112 .

[0060] This arrangement creates a small gap between the two parallel heating circuits, allowing for concentrated heat generation and a strong burst. Furthermore, the radially different positions of the first and second sub-heating sections 1211 and 1212 form the first heating segment 121, and the two heating circuits undergo a slight bend, making them approximately equal in length. This balances the heat generated by the two heating circuits to a certain extent, preventing localized excessive heat. This allows for flexible selection and application based on the design parameters of different atomizer models.

[0061] Furthermore, the first heating section 121 further includes a contact section 1213 connected between the two heating lines along the radial direction of the first surface 111. The contact section 1213 is provided at multiple locations. Along the radial direction of the first surface 111, the width of any contact section 1213 is equal or gradually widens from the radial inside to the radial outside, such as Figure 1-Figure 5 shown.

[0062] With this arrangement, the contact segment 1213 plays a shaping role for the two heating circuits, strengthens the morphological stability of the first heating segment 121, and is beneficial to ensuring the working life of the heating element 12; at the same time, all the contact segments 1213 are designed with equal width and gradually widened from the radial inside to the radial outside, which can also ensure that the heat generation of the two heating circuits can still be basically the same.

[0063] Regarding how to implement the small spacing design between two parallel heating circuits, in some embodiments, the outer diameter of the first surface 111 of the porous matrix 11 is set to R1, the inner diameter is set to R2, and the radial size of the first surface 111, that is, the ring diameter R = R1-R2, for example, R1 = 4.15mm, R2 = 1.9mm, R = 2.25mm. The radial distance between the radial outer edge of the first sub-heating portion 1211 and the outer edge of the first surface 111 is L1, and the radial distance between the radial inner edge of the second sub-heating portion 1212 and the inner edge of the first surface 111 is L2. The first heating section 121 includes two heating circuits distributed radially inward and outward. The wire diameters of the two heating circuits can be the same or different. The sum of the wire diameters of the two heating circuits is φ, and the radial spacing between the two heating circuits is L. The radial span of the two heating circuits is W, please refer to Figure 5 ,in:

[0064] 2 / 15≤L1 / R≤2 / 5. For example, L1 / R can be, but is not limited to, 2 / 15, 1 / 5, 4 / 15, 1 / 3, 2 / 5, etc., ensuring that L1 is ≥ 0.3 mm. This provides sufficient space for the bending claws 126 on the outer side of the heating element 12 to ensure that they can form a stable connection with the porous matrix 11.

[0065] 2 / 15≤L2 / R≤2 / 5. For example, L2 / R can be, but is not limited to, 2 / 15, 1 / 5, 4 / 15, 1 / 3, 2 / 5, etc., ensuring that L2 is ≥ 0.3 mm. This provides sufficient space for the inner bending claws 126 of the heating element 12 to ensure that they can form a stable connection with the porous matrix 11.

[0066] 1 / 5≤W / R≤11 / 15. As an example, W / R can be, but is not limited to, 1 / 5, 1 / 3, 7 / 15, 3 / 5, 11 / 15, etc. The radial span of the two heating circuits directly affects the temperature field distribution of the heating body. After testing and verification, such parameter design has a good balance between heat concentration and uniform atomization with good taste.

[0067] 0<L+φ<W, the difference between W and L is greater than the diameters of the two heating wires, and the minimum L can be about 0.14mm.

[0068] When the distance between two parallel heating circuits is large, in some embodiments, the heating circuits are all arc-shaped, and all the heating circuits are in a concentric arc relationship.

[0069] This arrangement creates a larger spacing between the two parallel heating circuits. Although the heat concentration is slightly weaker than in the previous embodiment where the two parallel heating circuits are closely spaced, it effectively increases the heating area of the heating element 12. Consequently, the atomization core 1 in this embodiment achieves better atomization uniformity. This configuration can be flexibly selected based on the design parameters of different atomizer models.

[0070] Furthermore, the first heating section 121 further includes a contact section 1213 connected between the two heating lines along the radial direction of the first surface 111. The contact section 1213 is provided at multiple locations. Along the radial direction of the first surface 111, any contact section 1213 gradually widens from the radial inner side to the radial outer side. Figure 6-Figure 9 shown.

[0071] With this arrangement, since all the heating circuits are concentric arcs and have large radial spacing, the inner circle heating circuit is shorter than the outer circle heating circuit. Therefore, the contact segment 1213 is designed to have a narrow inner circle and a wide outer circle, so that the lengths of the inner and outer circle heating circuits are roughly equal, thereby ensuring that the heating amount of the two circuits is roughly the same.

[0072] Regarding how to implement the large spacing design between the two parallel heating circuits, in some embodiments, the outer diameter of the first surface 111 of the porous matrix 11 is set to R1, the inner diameter is set to R2, and the radial size of the first surface 111, that is, the ring diameter R = R1-R2, for example, R1 = 4.15mm, R2 = 1.9mm, R = 2.25mm. The radial distance between the radial outer edge of the first heating section 121 and the outer edge of the first surface 111 is L1, and the radial distance between the radial inner edge of the first heating section 121 and the inner edge of the first surface 111 is L2. The first heating section 121 includes two heating circuits distributed radially inward and outward, and the radial span of the two heating circuits is W, please refer to Figure 9 ,in:

[0073] 2 / 15≤L1 / R≤2 / 5. For example, L1 / R can be, but is not limited to, 2 / 15, 1 / 5, 4 / 15, 1 / 3, 2 / 5, etc., ensuring that L1 is ≥ 0.3 mm. This provides sufficient space for the bending claws 126 on the outer side of the heating element 12 to ensure that they can form a stable connection with the porous matrix 11.

[0074] 2 / 15≤L2 / R≤2 / 5. For example, L2 / R can be, but is not limited to, 2 / 15, 1 / 5, 4 / 15, 1 / 3, 2 / 5, etc., ensuring that L2 is ≥ 0.3 mm. This provides sufficient space for the inner bending claws 126 of the heating element 12 to ensure that they can form a stable connection with the porous matrix 11.

[0075] 1 / 5≤W / R≤11 / 15. As an example, W / R can be, but is not limited to, 1 / 5, 1 / 3, 7 / 15, 3 / 5, 11 / 15, etc. The radial span of the two heating circuits directly affects the temperature field distribution of the heating body. After testing and verification, this parameter design has a good balance between heat concentration and uniform atomization with good taste. Ensuring W≥0.45mm can meet the space requirements for implementing this layout.

[0076] Since all the heating circuits in this embodiment are concentric arcs, the radial span W and the radial spacing are in a relationship corresponding to the wire diameter of the heating circuit.

[0077] It should be noted that between L1 and L2, L1>L2, L1<L2, or L1=L2. The figure exemplarily shows the solution of L1<L2.

[0078] In some specific embodiments, the central angle of the first heating section 121 on the first surface 111 is 180°-270°, that is, the first heating section 121 is annular and is between half a ring and three quarters of a ring. Figures 1-9 The examples shown are all about the first heating section 121 being a three-quarter ring.

[0079] The present application also provides some embodiments of the atomizer core 1 capable of partitioned atomization.

[0080] The applicant has found that in the atomizer core 1 of the related art, the aerosol-forming matrix is often a multi-component mixed liquid with different boiling points. Regarding the atomization problem of the multi-component mixed liquid, if the boiling point of the flavoring substance in the multi-component mixed liquid is low, there will be the following problems: if the temperature of the heating element 12 is too high, the low-boiling-point flavoring substance in the multi-component mixed liquid will be attenuated or destroyed; if the temperature of the heating element 12 is too low, the overall atomization amount will be small.

[0081] In order to solve the above problems, in some optional embodiments, in addition to the two electrode parts 125 and the first heating segment 121, the heating body also includes a second heating segment 122 connected between the two electrode parts 125. The second heating segment 122 is distributed circumferentially along the air duct 112. The first heating segment 121 and the second heating segment 122 are respectively located on both sides of the two electrode parts 125 to form a parallel relationship, so that the heating element 12 has a full circle of heating trajectory, and the heat generated by the first heating segment 121 is greater than the heat generated by the second heating segment 122.

[0082] Such arrangement enables the heating element 12 to have both a high temperature zone to provide a larger atomization amount and a low temperature zone to atomize the low-boiling-point flavor substances.

[0083] The second heating section 122 may be in a conventional arc shape. In some optional embodiments, a portion of the second heating section 122 may protrude radially inwardly of the air passage 112, and a portion of the second heating section 122 may protrude radially outwardly of the air passage 112. The second heating section 122 may be in an I-shaped, zigzag, or wavy shape.

[0084] In this arrangement, the first heating section 121 is a dual heating circuit design (refer to the design of two heating circuits with a large spacing in the aforementioned embodiment), and the second heating section 122 is a single circuit design; since the dual circuit design portion of the first heating section 121 generates a large amount of heat, a high temperature zone can be formed, while the single circuit design portion of the second heating section 122 generates a small amount of heat, a low temperature zone can be formed.

[0085] It should be noted that the distribution ratio of the first heating section 121 and the second heating section 122 can be arbitrary. Figure 10-12 As exemplarily shown in FIG, the first heating section 121 and the second heating section 122 are both configured in the form of a half ring.

[0086] In addition, in some optional embodiments, the second heating section 122 is not provided, and the purpose of partitioned atomization can be achieved only by the first heating section 121 in a non-full circle form. The two heating lines of the first heating section 121 are designed with a large spacing, and along the radial direction of the first surface 111, the width of any contact section 1213 is the same. Figure 13-15 shown.

[0087] In this case, the inner heating circuit is shorter than the outer heating circuit, so the contact section 1213 is designed to have a uniform width throughout. This allows the inner heating circuit to generate more heat, creating a high-temperature zone, while the outer heating circuit generates less heat, creating a low-temperature zone. Furthermore, the heat distribution ratio of the two heating circuits can be adjusted by adjusting the wire diameters of the two heating circuits.

[0088] Based on the above-mentioned atomizer core 1, the embodiment of the present application further provides an atomizer, which includes a housing and the above-mentioned atomizer core 1. The atomizer core 1 is arranged in the housing. Figure 17 As shown, the atomizer housing is provided with a liquid storage chamber 3 and an exhaust passage 2. The liquid storage chamber 3 contains an aerosol-forming matrix. The atomizer core 1 is in fluid communication with the liquid storage chamber 3. The second surface of the porous substrate 11 of the atomizer core 1 is adapted to face and connect with the exhaust passage 2 in the atomizer. The air passage 112 of the atomizer core is in communication with the exhaust passage 2. The atomizer battery is electrically connected to the heat generating body of the atomizer core 1 and the electrode portion 125. Since the atomizer includes the aforementioned atomizer core 1, the beneficial effects of the atomizer core 1 are described above and will not be elaborated upon here.

[0089] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0090] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0091] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0092] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0093] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0094] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An atomizer core, characterized in that: include: A porous substrate (11) having a first surface (111) and a second surface opposite to each other, and an air passage (112) extending through the first surface (111) and the second surface; A heating element (12) comprising a heating body arranged on the first surface (111); Wherein, the heating body comprises a first heating section (121) and two electrode parts (125); The first heating section (121) is connected between the two electrode portions (125) and distributed along the circumference of the air passage (112). The first heating section (121) includes at least two heating circuits that are radially spaced and arranged in parallel along the first surface (111).

2. The atomizer core according to claim 1, characterized in that The first heating section (121) is divided into a first sub-heating portion (1211) and a second sub-heating portion (1212) that are alternately distributed in the circumferential direction, and the radial distance between the first sub-heating portion (1211) and the air duct (112) is greater than the radial distance between the second sub-heating portion (1212) and the air duct (112).

3. The atomizer core according to claim 1, characterized in that All the heating circuits are concentric arcs.

4. The atomizer core according to any one of claims 1 to 3, characterized in that: The first heating section (121) further includes a connection section (1213) connected between the two heating lines, and the connection section (1213) is provided at multiple locations; Along the radial direction of the first surface (111), the width of any of the contact segments (1213) is the same at all locations or gradually widens from the radial inside to the radial outside.

5. The atomizer core according to claim 4, characterized in that: The heating body further comprises a second heating segment (122) connected between the two electrode portions (125), the second heating segment (122) being distributed along the circumference of the air passage (112), and the first heating segment (121) and the second heating segment (122) enabling the heating element (12) to have a full-circle heating trajectory; The heat generation of the first heating section (121) is greater than the heat generation of the second heating section (122).

6. The atomizer core according to claim 5, characterized in that A portion of the second heating section (122) protrudes radially inward of the air duct (112), and a portion of the second heating section (122) protrudes radially outward of the air duct (112).

7. The atomizer core according to claim 2, characterized in that The annular diameter of the first surface (111) is R, the first heating section (121) comprises two heating circuits distributed radially inwardly and outwardly, the sum of the diameters of the two heating circuits is φ, the radial spacing between the two heating circuits is L, and the radial span of the two heating circuits is W, wherein: 0<L+φ<W; 1 / 5≤W / R≤11 / 15.

8. The atomizer core according to claim 3, characterized in that The annular diameter of the first surface (111) is R, and the first heating section (121) includes two heating circuits distributed radially inward and outward, and the radial span of the two heating circuits is W, wherein: 1 / 5≤W / R≤11 / 15.

9. The atomizer core according to claim 1, characterized in that The central angle corresponding to the first heating section (121) on the first surface (111) is 180°-270°.

10. An atomizer, characterized in that: include: A housing and an atomizer core (1) according to any one of claims 1 to 9; A liquid storage chamber (3) and an exhaust passage (2) are provided in the shell, the atomizer core (1) is arranged in the shell and is in fluid communication with the liquid storage chamber (3), and the air passage (112) is in communication with the exhaust passage (2).

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