An atomizer and an electronic atomization device

Abstract

This application provides an atomizing core and an electronic atomizing device. The atomizing core includes a porous substrate and a heating element. The porous substrate has a liquid absorption surface and an atomizing surface, and the heating element is disposed on the atomizing surface. The porous substrate is defined as having a connected liquid seepage section and a temporary liquid storage section. The temporary liquid storage section is close to the atomizing surface, and the temporary liquid storage section represents the maximum volume Q of e-liquid that can be atomized in one vaping cycle of the atomizing core. c1 The portion occupying the volume of the porous matrix; in any single vaping cycle during continuous vaping, the atomizing core satisfies: Q cn ≥Q xn ≥Q bn Q cn Q represents the volume of e-liquid stored in the temporary reservoir before the start of the nth vaping cycle. xn Q represents the volume of e-liquid actually atomized in the nth vaping cycle. bn This represents the volume of e-liquid entering the porous matrix during the nth vaping cycle. This atomizer coil can operate without spitting or burning during multiple consecutive vaping cycles.

Description

Technical Field

[0001] This application relates to the field of electronic atomization device technology, specifically to an atomizing core and an electronic atomization device. Background Technology

[0002] With increasing health awareness among tobacco consumers and the development of the international tobacco control movement, e-cigarettes have gradually gained popularity. The key component of an e-cigarette is the atomizer coil, which generally consists of a porous substrate and a heating element mounted on it. When a consumer inhales the e-cigarette, the porous substrate absorbs e-liquid, which is then heated and atomized by the heating element to produce vapor. Currently, commercially available e-cigarettes commonly suffer from either "spitting" due to excessive e-liquid content in the porous substrate or "burnt coil" due to insufficient e-liquid content, severely impacting the user experience. Summary of the Invention

[0003] In view of this, this application provides an atomizing coil and an electronic atomizing device. The atomizing coil can operate without spitting or burning during multiple consecutive vaping cycles.

[0004] This application provides an atomizing core, comprising a porous substrate and a heating element. The porous substrate has a liquid absorption surface and an atomizing surface, and the heating element is disposed on the atomizing surface. The porous substrate is defined as having a connected liquid seepage portion and a temporary liquid storage portion, the temporary liquid storage portion being close to the atomizing surface. The temporary liquid storage portion represents the maximum volume Q of e-liquid that can be atomized in one vaping cycle of the atomizing core. c1 The portion that occupies the volume of the porous matrix;

[0005] in,

[0006] Q c1 =V×σ (1)

[0007] During any single vaping cycle of continuous vaping, the atomizing core satisfies the following:

[0008] Q cn ≥Q xn ≥Q bn (2)

[0009] When n≥2

[0010] Where V is the volume of the temporary liquid storage section, in cm³. 3 σ represents the porosity of the porous matrix; Q cn Q represents the volume of e-liquid stored in the temporary reservoir before the start of the nth vaping cycle. xn Q represents the volume of e-liquid actually atomized in the nth vaping cycle.bn Q represents the volume of e-liquid entering the porous matrix during the nth vaping cycle. cn Q c1 Q xn and Q bn The units are all mL; i is any integer value between 1 and n; f(T) i ) represents the functional relationship between the actual mass of e-liquid atomized and the vaping time in the i-th cycle; T i t represents the duration of the i-th suction cycle, in seconds. i ν is the interval between the i-th suction cycle and the (i+1)-th suction cycle, in seconds; b S(h) represents the penetration velocity of e-liquid in the porous matrix at a distance h from the atomizing surface, in cm / s; S(h) represents the cross-sectional area of ​​the porous matrix at a distance h from the atomizing surface, in cm². 2 .

[0011] The volume Q of e-liquid stored in the temporary reservoir during multiple consecutive vaping cycles of the aforementioned atomizer coil. cn The volume Q of e-liquid consumed by atomization on the atomizing surface. xn And the volume Q of e-liquid entering the atomizer coil. bn By consistently satisfying the above conditions, the atomizer core always contains an appropriate amount of e-liquid, which effectively avoids the occurrence of burnt cores and spitting e-liquid during multiple consecutive vaping cycles, thereby significantly improving the user experience.

[0012] The second aspect of this application provides an electronic atomizing device having the atomizing core provided in the first aspect of this application.

[0013] When this electronic atomizer is working, e-liquid and other substances are introduced through a porous substrate onto a heating element. When the heating element is heated, vapor is produced. Thanks to the aforementioned atomizing coil, the electronic atomizer does not burn or spit e-liquid during multiple continuous vaping cycles, resulting in a good user experience and a long lifespan. Furthermore, the vapor produced by this electronic atomizer has a good flavor and a high degree of fullness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an atomizing core provided in an embodiment of this application;

[0015] Figure 2 A grayscale image of the atomizing core provided in Embodiment 1 of this application from one perspective;

[0016] Figure 3 This is the function curve of e-liquid atomization quality versus time of the atomizer core measured in Example 1 of this application;

[0017] Figure 4 This is a grayscale image of the atomizing core provided in Embodiment 3 of this application from one perspective.

[0018] Figure description: 100-Atomizing core; 10-Porous substrate; 101-Liquid absorption surface; 102-Atomizing surface; 103-Liquid seepage section; 104-Temporary liquid storage section; 20-Heating element. Detailed Implementation

[0019] Currently, many electronic atomizing devices on the market suffer from the problems of "splattering e-liquid" and "burnt coils." "Splattering" occurs when excessive e-liquid accumulates on the atomizing surface within a short period, causing it to overboil during heating, producing a splattering sound similar to water droplets falling into a hot oil pan. Furthermore, during splattering, excess e-liquid splashes into the atomizing chamber, causing liquid buildup and severely impacting the user experience and wasting e-liquid. "Burnt coils," on the other hand, occur when the heating element on the atomizing surface burns, producing a burnt smell, which also significantly affects the user experience. To address these issues, this application provides an atomizing coil solution.

[0020] Specifically, the technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0021] Please see Figure 1 The atomizing core 100 includes a porous substrate 10 and a heating element 20. The porous substrate 10 has a liquid absorption surface 101 and an atomizing surface 102, and the heating element 20 is disposed on the atomizing surface 102. The porous substrate 10 is defined as having a connected liquid seepage section 103 and a temporary liquid storage section 104. The temporary liquid storage section 104 is close to the atomizing surface 102, and the temporary liquid storage section 104 represents the maximum volume Q of e-liquid that can be atomized in one vaping cycle of the atomizing core 100. c1 The portion occupying the volume of the porous matrix 10;

[0022] in,

[0023] Q c1 =V×σ (1)

[0024] During any single vaping cycle of continuous vaping, the atomizing core 100 satisfies the following:

[0025] Q cn ≥Q xn ≥Q bn (2)

[0026] When n≥2

[0027] Where V is the volume of the temporary liquid storage section 104, in cm³. 3 σ represents the porosity of the porous matrix 10; Qcn Q represents the volume of e-liquid stored in the temporary reservoir 104 before the start of the nth vaping cycle. xn Q represents the volume of e-liquid actually atomized in the nth vaping cycle. bn Q represents the volume of e-liquid entering the porous matrix 10 during the nth vaping cycle. cn Q xn and Q bn The units are all mL; i is any integer value between 1 and n; f(T) i ) represents the functional relationship between the actual mass of e-liquid atomized and the vaping time in the i-th cycle; T i t represents the duration of the i-th suction cycle, in seconds. i ν is the interval between the i-th suction cycle and the (i+1)-th suction cycle, in seconds; b S(h) represents the penetration velocity of e-liquid in the porous substrate 10 at a distance h from the atomizing surface 102, in cm / s; S(h) represents the cross-sectional area of ​​the porous substrate 10 at a distance h from the atomizing surface 102, in cm². 2 .

[0028] It should be noted that the e-liquid atomized in the i-th vaping cycle all comes from the e-liquid that was stored in the temporary reservoir 104 before the vaping. The e-liquid that enters the porous substrate 10 in the i-th vaping cycle will be atomized in the (i+1)-th vaping cycle.

[0029] The following section discusses the temporary liquid storage section 104 and Q. c1 The definition is explained in detail:

[0030] Define the maximum volume Q of e-liquid that can be atomized in one vaping cycle of the atomizer coil 100. c1 The portion occupying the volume of the porous substrate 10 is the temporary liquid storage section 104. That is, the maximum volume of e-liquid that can be atomized in a single vape stroke, located at the upper liquid surface of the atomizing core 100, is at a distance h from the atomizing surface 102. d The entire space enclosed by the plane, the atomizing surface 102, and part of the sidewall of the porous substrate 10 constitutes the temporary liquid storage section 104 (that is, the height of the temporary liquid storage section is h). d See also Figure 1 Naturally, the entire space enclosed by the plane containing the upper liquid surface of the e-liquid, the liquid absorption surface 101, and part of the sidewall of the porous substrate 10 is the seepage portion 103.

[0031] Understandably, for each atomizer coil, Q c1 The value is fixed. Furthermore, the volume of the temporary liquid storage section 104 can be determined according to h. dThe value and structural characteristics of the atomizer coil are calculated using mathematical formulas. Understandably, the critical condition for coil burn-in is: the maximum volume Q of e-liquid that can be atomized in the temporary reservoir 104 during a single vape cycle. c1 Equal to the actual volume Q' of e-liquid consumed in that vaping session x1 That is, the e-liquid level at the end of a single inhalation coincides exactly with the atomizing surface 102. If Q c1 Less than the above Q' x1 The core will burn.

[0032] Therefore, assuming continuous and uniform suction T h When condensation occurs, the height at point 102 on the atomizing surface is recorded as 0, i.e.:

[0033]

[0034] And again,

[0035] Q c1 =V×σ=Q' x1 (5)

[0036] In the above relation, ν b (h) refers to the permeation rate of e-liquid in the porous matrix 10 at a height h from the atomizing surface 102. It is closely related to the e-liquid viscosity, the temperature of the e-liquid in the porous matrix, and the pore structure (pore size distribution and porosity σ) of the porous matrix 11, and can be determined through e-liquid permeation experiments of the atomizing core. Furthermore, for existing atomizing cores, σ is a known parameter, or σ can also be determined experimentally.

[0037] And because, at this time, Q c1 It is also equal to Q' x1 The above Q' x1 The amount of e-liquid actually atomized and the vaping time T can be determined by... h The functional relationship can be obtained by combining equations (4) and (5). The above functional relationship can also be obtained through previous experiments. h with h d The value of Q can be used to determine the maximum volume of e-liquid that can be atomized in a single vaping cycle. c1 The volume V of the temporary liquid storage section 104.

[0038] Understandably, when n≥2, Q cn After the atomizer coil 100 has worked continuously for (n-1) cycles, the amount of e-liquid stored in the temporary reservoir 104, that is, the total volume Q of e-liquid in the temporary reservoir 104 before the start of the first cycle. c1 Add the total volume of e-liquid entering the porous matrix in (n-1) cycles (during the time interval t between two adjacent suction cycles)i Inside, due to inertia, some e-liquid is also drawn into the porous matrix 10, minus the total volume of e-liquid actually atomized in (n-1) cycles. Therefore, we can obtain formula (3):

[0039] When n≥2

[0040] In the i-th vaping cycle, the e-liquid that enters the porous substrate 10 will be atomized in the (i+1)-th vaping cycle. Understandably, the critical condition for the atomizer coil 100 to experience "e-liquid spitting" is:

[0041] The volume Q' of e-liquid entering the porous matrix 10 b1 Equal to the total volume Q' of the e-liquid that was actually atomized x1 After this vaping cycle, the total volume of e-liquid in the atomizer core 100 is Q. c1 -Q' x1 +Q' b1 This value is equal to the capacity Q of the temporary liquid storage section 104. c1 If Q' x1 <Q' b1 Then Q c2 Q c1 At this point, e-liquid will overflow into the seepage section 103. Excessive e-liquid content inside the porous substrate 10 will cause e-liquid to accumulate on the atomizing surface 102 in a short period, resulting in "splattering". Therefore, to ensure that the atomizing core 100 does not splatter in any of multiple consecutive vaping cycles, Q must be satisfied. xn ≥Q bn .

[0042] In summary, by ensuring that the temporary reservoir 104 contains sufficient e-liquid before the start of each vaping cycle, the volume Q of e-liquid atomized in each vaping cycle is guaranteed to be sufficient. xn The volume Q of the e-liquid stored in the temporary storage section 104 is less than or equal to the volume of the e-liquid. cn This effectively prevents the "burnt coil" phenomenon. Furthermore, it controls the volume Q of e-liquid entering the atomizing coil 100 during each puff. xn Between Q bn With Q cn This design ensures that the temporary reservoir 104 contains sufficient e-liquid before the start of the next vaping cycle, while preventing excess e-liquid from seeping into the atomizing surface 102 in a short period, thus avoiding the "splattering" phenomenon and significantly improving the user experience. Furthermore, it extends the lifespan of the atomizing coil 100.

[0043] In some embodiments of this application, the above Q bn The following relationship must be satisfied: Q bn =νb (h)×S(h)×T n ×σ(Equation 6); where, ν b S(h) represents the penetration velocity of e-liquid in the porous substrate 10 at a distance h from the atomizing surface 102, in cm / s; S(h) represents the cross-sectional area of ​​the porous substrate 10 at a distance h from the atomizing surface 102, in cm². 2 .

[0044] In some embodiments of this application, the above Q xn The following relationship must be satisfied: Where, f(T) n The expression f(T) represents the functional relationship between the mass of the atomized e-liquid and the inhalation time, where ρ is the density of the e-liquid in mg / mL. n This can be determined through preliminary experiments. In some cases, the actual mass of e-liquid vaporized by the atomizer core at different time points is measured to obtain the relationship curve between the actual mass of vaporized e-liquid and time. f(T) can then be obtained through function fitting. n By finding the functional relationship between the atomizer core and the density of the e-liquid, the Q of the atomizer core (100) can be calculated. xn .

[0045] In some embodiments of this application, the above-mentioned t i The following relationship must be satisfied: Generally, when a user takes multiple puffs consecutively, the duration of a single puff is typically 2.0-2.5 seconds. The interval between two consecutive puffs usually has a specific duration requirement, for example, within the range of greater than 0 seconds and less than or equal to 1 second. The time limit for t... i Within the above scope, it is easy to define whether multiple suction actions performed by a user are considered continuous suction.

[0046] In some embodiments of this application, the above-mentioned t i Less than or equal to 0.6s.

[0047] In some embodiments of this application, the above-mentioned T i Less than or equal to 3 seconds. Generally, consumers can achieve a more comfortable user experience when using electronic atomizers to vape e-liquids if the duration of a single puff does not exceed 3 seconds.

[0048] In some embodiments of this application, n is less than or equal to 15. In this case, the atomizing core 100 will not experience core clogging during no more than 15 consecutive vaping cycles.

[0049] In some specific embodiments, when the duration of each vaping cycle is 3 seconds, the interval between two adjacent vaping cycles is 0.6 seconds, and 15 consecutive vaping cycles are performed, the atomizing core 100 will not experience clogging or spitting.

[0050] In some embodiments of this application, the porosity σ of the porous substrate 10 is in the range of 40%-60%. Exemplarily, the porosity of the porous substrate 10 can be 40%, 45%, 50%, 55%, 60%, etc. By controlling the porosity of the porous substrate 10, not only can the total volume of e-liquid entering the porous substrate 10 in each vaping cycle be directly controlled, but the conduction rate of e-liquid in the seepage section 103 and the temporary reservoir section 104 can also be changed, thereby further controlling the Q of the atomizing core 100. bn Within a suitable range, and allowing the e-liquid to be quickly and effectively transferred to the atomizing surface 102, a fast and excellent atomization effect can be achieved, which also helps to ensure that the atomizing core 100 does not burn or splatter.

[0051] In some specific embodiments, the porosity σ at various locations within the porous matrix 10 can be the same or different. This parameter can be determined based on the shape and size of the porous matrix and actual application requirements.

[0052] In some embodiments of this application, the volume V of the temporary liquid storage section 104 is 0.01 cm³. 3 -0.2cm 3 Within a certain range. In some specific embodiments, V is within 0.01 cm. 3 -0.1cm 3 Within the range. For example, the aforementioned V can be 0.01 cm. 3 0.02cm 3 0.03cm 3 0.04cm 3 0.05cm 3 0.1cm 3 0.15cm 3 0.2cm 3 By adjusting the dimensions of the porous substrate 10 and the pore structure and distribution of the porous substrate 10, V can be controlled within the above range, which helps to ensure that the atomizing core 100 can provide an appropriate amount of e-liquid for atomization in each vaping cycle, thereby ensuring that the core does not burn or spit e-liquid, and improving the user's vaping experience.

[0053] In some embodiments of this application, Qc1 is at 0.004 cm 3 -0.12cm 3 Within the range. In some specific embodiments, Qc1 is within 0.004 cm. 3 -0.06cm 3Within the range. For example, Qc1 can be 0.004cm. 3 0.005cm 3 0.006cm 3 0.007cm 3 0.008cm 3 0.009cm 3 0.01cm 3 0.05cm 3 0.06cm 3 0.07cm 3 0.08cm 3 0.09cm 3 0.1cm 3 0.12cm 3 Etc1 is controlled within the above range, which helps ensure that the atomizer core 100 provides an appropriate amount of e-liquid in each vaping cycle, thus providing the user with a good user experience.

[0054] In some embodiments of this application, the permeation velocity ν of the e-liquid in the porous matrix 10 at a distance h from the atomizing surface 102 is... b (h) is in the range of 0.01 cm / s to 0.2 cm / s. In some specific embodiments, the permeation velocity ν of the e-liquid in the porous matrix 10 at a distance h from the atomizing surface 102 is... b (h) is in the range of 0.01 cm / s to 0.1 cm / s. For example, the above ν... b (h) can be 0.01 cm / s, 0.02 cm / s, 0.03 cm / s, 0.04 cm / s, 0.05 cm / s, 0.1 cm / s, 0.15 cm / s, 0.2 cm / s, etc. The permeation rate ν at various points in the porous matrix 10 is controlled. b (h) Within the above range, it is beneficial to control the total volume Q of e-liquid entering the porous matrix 10 in each vaping cycle. bn Within a suitable range, it is also beneficial to ensure that the conduction rate of e-liquid in the porous substrate 10 is appropriate, so that the e-liquid can enter the temporary reservoir 104 within the expected time. This helps to ensure that the atomizer 100 does not splatter or burn during multiple consecutive vaping cycles, and also helps to transform the e-liquid into a smooth vapor, thereby improving the user's vaping experience.

[0055] In this application, the porous substrate 10 has ν at different heights h from the atomizing surface 102. b (h) can be the same or different. Where, ν b (h) can gradually decrease along the direction of e-liquid penetration, or it can remain constant at first and then decrease, or it can change in a gradient.

[0056] In some embodiments of this application, the maximum cross-sectional dimension of the seepage section 103 is smaller than the maximum cross-sectional dimension of the temporary storage section 104. The cross-section is perpendicular to the direction from the liquid absorption surface 101 of the porous substrate 10 towards the atomizing surface 102. The smaller maximum cross-sectional dimension of the seepage section 103 compared to the temporary storage section 104 facilitates further control of the volume of e-liquid entering the temporary storage section 104 from the seepage section 103 per unit time, thereby better preventing the occurrence of "oil splattering".

[0057] In some embodiments of this application, the cross-sectional area of ​​the porous substrate 10 remains constant and then increases along the extension direction from the liquid absorption surface 101 to the atomizing surface 102. In this case, the longitudinal section of the porous substrate (parallel to the direction from the liquid absorption surface 101 of the porous substrate 10 to the atomizing surface 102) is "stepped," which helps to control the continuous and uniform penetration of e-liquid from the temporary liquid storage section 104 onto the atomizing surface 102, thereby providing consumers with a better user experience.

[0058] In some embodiments of this application, the cross-sectional area of ​​the porous substrate 10 gradually increases along the extension direction from the liquid absorption surface 101 to the atomizing surface 102. In this case, the shape of the porous substrate 10 can be a frustum, which can also better control the continuous and uniform penetration of e-liquid in the temporary liquid storage section 104 onto the atomizing surface 102, so as to provide consumers with a better user experience.

[0059] In this application, the shape of the longitudinal section of the porous substrate 10 (the longitudinal section parallel to the direction from the liquid absorption surface 101 of the porous substrate 10 to the atomizing surface 102) can be an inverted "T" shape, a trapezoid, an irregular shape composed of multiple trapezoids or rectangles, etc. The sidewall of the porous substrate 10 (referring to the part of the porous substrate 10 located between the liquid absorption surface 101 and the atomizing surface 102, the sidewall connecting the liquid absorption surface 101 and the atomizing surface 102) can be a plane or a curved surface, and there are no specific limitations on the shape of the liquid absorption surface 101 and the atomizing surface 102. The liquid absorption surface 101 and the atomizing surface 102 can be arranged opposite each other. Those skilled in the art can choose according to actual production needs.

[0060] In some embodiments of this application, the heating element 20 includes, but is not limited to, any one of a heating film, a heating sheet, a heating circuit, and a heating mesh.

[0061] In some embodiments of this application, the porous substrate 10 is made of at least one of porous ceramic and oil-wicking cotton. The porous substrate 10 may be porous ceramic, or it may be oil-wicking cotton, or it may be composed of both porous ceramic and oil-wicking cotton.

[0062] This application also provides an electronic atomizing device, which includes the atomizing core 100 provided in this application embodiment.

[0063] When this electronic atomizer is working, e-liquid and other substances are introduced through a porous substrate onto a heating element. When the heating element is heated, vapor is produced. Thanks to the aforementioned atomizing coil, the electronic atomizer does not burn or spit e-liquid during multiple continuous vaping cycles, resulting in a good user experience and a long lifespan. Furthermore, the vapor produced by this electronic atomizer has a good flavor and a high degree of fullness.

[0064] The technical solution of this application will be described in detail below with reference to specific embodiments.

[0065] Example 1

[0066] Example 1 provides an atomizing core, and a grayscale image of the atomizing core from a certain angle can be found here. Figure 2 .

[0067] The atomizing core is inverted "T" shape, with a liquid-absorbing surface and an atomizing surface arranged opposite each other. A heating element is located on the atomizing surface. The liquid-absorbing surface is located on the upper surface of the porous substrate (the surface with the smallest maximum cross-sectional dimension), and the atomizing surface is located on the lower surface of the porous substrate (the surface with the largest maximum cross-sectional dimension). The atomizing core has a temporary liquid reservoir of volume V (the temporary liquid reservoir is located at a distance h from the atomizing surface). d The entire space enclosed by the plane, the atomizing surface, and the sidewalls of the porous substrate (the liquid seepage area is the portion of the porous substrate excluding the temporary liquid storage area), which is the maximum volume of e-liquid Q that can be atomized in one vaping cycle of the atomizing core. c1 The volume occupied by the porous matrix is ​​V. The dimensions of the liquid absorption surface of the atomizing core are 4.8mm × 2.2mm, the dimensions of the atomizing surface are 8.0mm × 3.0mm, the thickness of the upper cuboid h1 is 2.5mm, the thickness of the lower cuboid h2 is 0.8mm, and the heating element is a metal heating wire set on the atomizing surface using a screen printing method. The porosity σ of the porous matrix is ​​58%, and the density ρ of the e-liquid used is 1.1mg / mL.

[0068] The above-mentioned atomizing core was subjected to smoke extraction and collection tests, and the results of the smoke extraction and collection tests at different times are as follows: Figure 3 As shown. Further fitting yielded the following functional relationship between e-liquid atomization and inhalation time: Meanwhile, the penetration rate of e-liquid in the porous matrix was measured to be 2.8 × 10⁻⁶ according to the oil penetration test. -2 cm / s. Furthermore, the critical condition for the coil burning phenomenon is that the e-liquid level at the end of a single puff exactly coincides with the atomization surface; that is, assuming continuous and uniform puffing of T... h If condensation occurs and the height at atomization surface 102 is recorded as 0, then:

[0069] Q c1 =V×σ (1)

[0070]

[0071] And again,

[0072] ν b (h)×T h =T d (8)

[0073] Substituting the measured results into equations (1), (4), and (8) respectively, we get:

[0074]

[0075] 0.28×T h =h d

[0076] Where h is obtained d =1.23×10 -1 cm, T h = 4.53s. According to h d We can calculate V = 21.8596 × 10 -3 cm 3 .

[0077] And again, Q bn =ν b (h)×S(h)×T n ×σ(Equation 6). Therefore, the duration of a single suction cycle T... i When all values ​​are 3s, substitute the above values ​​into equations (1), (6), and (7) respectively to calculate Q. c1 Q x1 and Q b1 They are 12.67×10 -3 mL, 6.39×10 -3 mL, 5.14×10 -3 mL, satisfying Q c1 ≥Q x1 ≥Q b1 .

[0078] When continuously drawing two puffs from the atomizing coil, the interval t1 between the second and first drawing cycles is 0.6s. Substituting this into equation (3) Q was calculated c2 =12.44×10 -3 mL, and Q x2 and Q b2 They are 6.39×10 -3 mL, 5.14×10 -3 mL, also satisfying Q c2≥Q x2 ≥Q b2 .

[0079] When continuously inhaling 15 puffs from the atomizer coil, the interval t between the 15th and 14th inhalation cycles is... 14 Also 0.6s(T) 15 =3s,t 14 =0.6s), Q can be calculated according to the aforementioned equation (3). c15 It is 9.45×10 -3 mL, while measuring Q x15 and Q b15 They are 6.39×10 -3 mL, 5.14×10 -3 mL, thus satisfying Q c15 ≥Q x15 ≥Q b15 Therefore, the atomizer core will not burn or spit oil even after 15 consecutive puffs.

[0080] Example 2

[0081] Example 2 provides an atomizing core with the same structural features and dimensions as in Example 1. The porosity σ of the porous matrix is ​​40%, and the density ρ of the e-liquid used is 1.1 mg / mL.

[0082] Similarly, the above atomizer core was subjected to smoke extraction and collection tests, and the functional relationship between the amount of e-liquid atomized and the inhalation time was obtained by fitting the following formula: Meanwhile, the penetration rate of e-liquid in the porous matrix was measured to be 2.5 × 10⁻⁶ based on the oil penetration test. -2 cm / s, substituting the measured results into equations (1), (4), and (8) respectively, we get:

[0083]

[0084] 0.25×T h =h d

[0085] Find h d =1.04×10 -1 cm, T h = 4.17s. That is, the temporary liquid storage section is 1.04 × 10⁻⁶ meters above the atomizing surface. -1 The entire space enclosed by the plane at cm, the atomizing surface, and the sidewalls of the porous substrate. According to h d =1.04×10 -1 The volume of the temporary liquid storage section can be calculated to be V = 21.7344 × 10 cm. -3 cm 3 Duration T of a single suction cycle i When both are 3s, Qc1 Q x1 and Q b1 They are 8.71×10 -3 mL, 4.51×10 -3 mL, 3.17×10 -3 mL, satisfying Q c1 ≥Q x1 ≥Q b1 .

[0086] When the second suction cycle is performed, the interval t1 between the first and second suction cycles is 0.6 s, and Q can be obtained. c2 Q x2 and Q b2 They are 8.43×10 -3 mL, 4.51×10 -3 mL, 3.17×10 -3 mL, also satisfying Q c2 ≥Q x2 ≥Q b2 .

[0087] When the 15th continuous suction is performed (T) 15 =3s,t 14 =0.6s), Q can be obtained c15 Q x15 and Q b15 They are 4.84×10 -3 mL, 4.51×10 -3 mL, 3.17×10 -3 mL, satisfying Q c15 ≥Q x15 ≥Q b15 Therefore, the atomizer core will not burn or spit oil even after 15 consecutive puffs.

[0088] Example 3

[0089] Example 3 provides an atomizing core, which has a frustum-shaped shape (e.g., Figure 4 (As shown). The atomizer core has a liquid absorption surface of 5.0mm × 4.0mm, an atomizing surface of 10.0mm × 4.0mm, and a trapezoidal thickness h of 5.0mm. The longitudinal section of the atomizer core is an isosceles trapezoid, and the width at height h3 is (10-h3). The heating element is a metal heating wire screen-printed onto the atomizing surface. The porosity σ of the porous matrix is ​​58%, the density ρ of the e-liquid is 1.1mg / mL, and the permeation rate of the e-liquid in the porous matrix is ​​1.8 × 10⁻⁶. -2 cm / s. The fitted function relationship between e-liquid atomization amount and inhalation time is as follows: Substituting the measured results into equations (1), (4), and (8) respectively, we get:

[0090]

[0091] 0.18T h =h d

[0092] Find h d =1.28×10 -1 cm, T h = 7.09s. That is, the temporary liquid storage section is 1.28 × 10⁻⁶ meters above the atomizing surface. -1 The total space enclosed by the plane at cm, the atomizing surface, and the sidewalls of the porous substrate, has a temporary liquid storage volume V = 47.8217 × 10⁻⁶. - 3 cm 3 Duration T of a single suction cycle i When both are 3s, Q is calculated. c1 Q x1 and Q b1 They are 27.741×10 -3 mL, 8.55×10 -3 mL, 6.26×10 -3 mL, satisfying Q c1 ≥Q x1 ≥Q b1 .

[0093] When the second suction cycle is performed, the interval t1 between the first and second suction cycles is 0.6 s, and Q can be obtained. c2 Q x2 and Q b2 They are 27.61×10 -3 mL, 8.55×10 -3 mL, 6.26×10 -3 mL, also satisfying Q c2 ≥Q x2 ≥Q b2 .

[0094] When the 15th continuous suction is performed (T) 15 =3s,t 14 =0.6s), Q can be obtained c15 Q x15 and Q b15 They are 25.97×10 -3 mL, 8.55×10 -3 mL, 6.26×10 -3 mL, satisfying Q c15 ≥Q x15 ≥Q b15 Therefore, the atomizer core will not burn or spit oil even after 15 consecutive puffs.

[0095] Example 4

[0096] Example 4 provides an atomizing core with the same structural features and dimensions as in Example 3. The porosity σ of the porous matrix is ​​58%, the density ρ of the e-liquid used is 1.1 mg / mL, and the permeation rate of the e-liquid in the porous matrix is ​​0.011 cm / s. The fitted function relating the e-liquid atomization amount to the vaping time is as follows: Substituting the measured results into equations (1), (4), and (8) respectively, we get:

[0097]

[0098] 0.11T h =h d

[0099] Find h d =7.18×10 -1 cm, T h = 6.53s. That is, the temporary liquid storage section is 7.18 × 10⁻⁶ meters above the atomizing surface. -1 The total space enclosed by the plane at cm, the atomizing surface, and the sidewalls of the porous substrate, has a temporary liquid storage volume V = 23.168 × 10⁻⁶. - 3 cm 3 Duration T of a single suction cycle i When both are 3s, Q c1 Q x1 and Q b1 They are 16.06×10 -3 mL, 5.85×10 -3 mL, 3.83×10 -3 mL, satisfying Q c1 ≥Q x1 ≥Q b1 .

[0100] When the second suction cycle is performed, the interval t1 between the first and second suction cycles is 0.6 s, and Q can be obtained. c2 Q x2 and Q b2 They are 15.35×10 -3 mL, 5.85×10 -3 mL, 3.83×10 -3 mL, also satisfying Q c2 ≥Q x2 ≥Q b2 .

[0101] When the 15th continuous suction is performed (T) 15 =3s,t 14=0.6s), Q can be obtained c15 Q x15 and Q b15 They are 6.23×10 -3 mL, 5.85×10 -3 mL, 3.83×10 -3 mL, satisfying Q c15 ≥Q x15 ≥Q b15 Therefore, the atomizer core will not burn or spit oil even after 15 consecutive puffs.

[0102] The above description is an exemplary embodiment of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An atomizing core, characterized in that, The atomizing core includes a porous substrate and a heating element. The porous substrate has a liquid absorption surface and an atomizing surface, and the heating element is disposed on the atomizing surface. The porous substrate is defined as having a connected liquid seepage section and a temporary liquid storage section. The temporary liquid storage section is close to the atomizing surface, and the temporary liquid storage section represents the maximum volume Q of e-liquid that can be atomized in one vaping cycle of the atomizing core. c1 The portion that occupies the volume of the porous matrix; in, （1） During any single vaping cycle of continuous vaping, the atomizing core satisfies the following: （2） when n > 2, (3) in, The volume of the temporary liquid storage section is in cm³. 3 ; The porosity of the porous matrix; This represents the volume of e-liquid stored in the temporary reservoir before the start of the nth vaping cycle. This represents the volume of e-liquid actually atomized in the nth vaping cycle. The volume of e-liquid entering the porous matrix during the nth vaping cycle is represented by the volume of e-liquid that enters the porous matrix. , , and The units are all mL; i is any integer value between 1 and n; This represents the functional relationship between the mass of e-liquid actually atomized and the inhalation time in the i-th cycle; T i The duration of the i-th suction cycle is expressed in seconds. t i The interval between the i-th suction cycle and the (i+1)-th suction cycle is in seconds. The permeation velocity of e-liquid in the porous matrix at a distance h from the atomizing surface is expressed in cm / s. The cross-sectional area of ​​the porous substrate at a distance h from the atomizing surface is expressed in cm². 2 ρ represents the density of the e-liquid, in mg / mL.

2. The atomizer core of claim 1, wherein, The satisfies the following relationship: .

3. The atomizing core according to claim 1, characterized in that, The satisfies the following relationship: .

4. The atomizer core of claim 1, wherein, The t i satisfies the following relationship: .

5. The atomizer core of claim 1, wherein, The In the range of 0.004 cm 3 -0.12 cm 3 .

6. The atomizer core of claim 1, wherein, The In the range of 40-60%.

7. The atomizer core of claim 1, wherein, The In the range of 0.01 cm / s - 0.2 cm / s.

8. The atomizer core of claim 1 or 4, wherein, The t i less than or equal to 0.6 s.

9. The atomizer core of claim 1, wherein, The n is less than or equal to 15.

10. The atomizer core of claim 1, wherein, The T i Less than or equal to 3s.

11. The atomizer core of claim 1, wherein, The maximum cross-sectional dimension of the seepage section is smaller than the maximum cross-sectional dimension of the temporary liquid storage section.

12. The atomizer core of claim 11, wherein, The cross-sectional area of ​​the porous matrix gradually increases along the extension direction of the liquid absorption surface to the atomizing surface, or the cross-sectional area of ​​the porous matrix remains unchanged and then increases along the extension direction of the liquid absorption surface to the atomizing surface.

13. An electronic atomizing device, characterized by, The electronic atomizing device has an atomizing core as described in any one of claims 1-12.

Images