WO2023236585A1

WO2023236585A1 - Atomization core and electronic atomization device

Info

Publication number: WO2023236585A1
Application number: PCT/CN2023/077343
Authority: WO
Inventors: 金奇斌; 陈超南; 卢音波; 唐建国
Original assignee: 比亚迪精密制造有限公司
Priority date: 2022-06-06
Filing date: 2023-02-21
Publication date: 2023-12-14
Also published as: CN117223908A; EP4289296A1; US20230389609A1

Abstract

An electronic atomization device is provided with an atomization core (100), the atomization core (100) comprises a porous base (10) and a heating member (20), the porous base (10) is provided with a liquid absorption surface (101) and an atomization surface (102), and the heating member (20) is disposed on the atomization surface (102); it is defined that the porous base (10) is divided into a liquid-permeable part (103) and a temporary liquid storage part (104) connected to each other, the temporary liquid storage part (104) is close to the atomization surface (102), and the temporary liquid storage part (104) is, in one vaping period of the atomization core (100), the part of the volume of the porous base (10) that the maximum volume Q_c1 of e-liquid that can be atomized occupies; in any vaping period of continuous vaping, the atomization core (100) satisfies: Q_cn≥Q_xn≥Q_bn, Q_cn representing the volume of the e-liquid stored in the temporary liquid storage part (104) before the start of the nth vaping period, Q_xn representing the volume of the e-liquid actually atomized in the nth vaping period, and Q_bn representing the volume of the e-liquid entering the porous base (10) in the nth vaping period.

Description

Atomizer core and electronic atomization device

This application claims priority to the Chinese patent application submitted to the China Patent Office on June 6, 2022, with the application number 202210631709.6 and the application name "An atomization core and electronic atomization device", the entire content of which is incorporated by reference in in this application.

Technical field

The present application relates to the technical field of electronic atomization devices, and specifically relates to an atomizing core and an electronic atomizing device.

Background technique

With the improvement of tobacco consumers' own health awareness and the development of the international tobacco control movement, e-cigarettes are gradually becoming more popular among consumers. The key component in electronic cigarettes is the atomization core. The atomization core generally includes a porous matrix and a heating element arranged on the porous matrix. When consumers smoke e-cigarettes, the porous matrix absorbs the e-liquid to the heating element. Under the electric heating of the heating element, the e-liquid can be heated and atomized to produce smoke. At present, there are common phenomena of "oil leakage" or "burning core" in commercially available e-cigarettes, which seriously affects the user's sense of use.

Contents of the invention

In view of this, this application provides an atomization core and an electronic atomization device. This atomizer core can be used in multiple consecutive puffing cycles without oil frying or core burning.

The first aspect of this application provides an atomizing core. The atomizing core includes a porous matrix and a heating element. The porous matrix has a liquid-absorbing surface and an atomizing surface. The heating element is provided on the atomizing surface; It is defined that the porous matrix is divided into a connected liquid seepage part and a temporary liquid storage part, the temporary liquid storage part is close to the atomization surface, and the temporary liquid storage part is, during one suction cycle of the atomization core , the maximum volume of e-liquid that can be atomized Q _c1 occupies the part of the volume of the porous matrix;

in,
Q _c1 =V×σ (1)

In any puffing cycle of continuous puffing, the atomizing core satisfies:
Q _cn ≥Q _xn ≥Q _bn (2)

When n≥2,

Wherein, V is the volume of the temporary liquid storage part, in cm ³ ; σ is the porosity of the porous matrix; Q _cn represents the e-liquid stored in the temporary liquid storage part before the start of the nth smoking cycle The volume, Q _xn represents the actual fog in the nth suction cycle The volume of the dissolved e-liquid, Q _bn represents the volume of e-liquid entering the porous matrix in the n-th puffing cycle, and the units of Q _cn , Q _c1 , Q _xn and Q _bn are all mL; i is any integer value between 1 and n; f(T _i ) represents the functional relationship between the mass of the actually atomized e-liquid and the puffing time in the i-th cycle; T _i is the i-th puff cycle The duration of the process, the unit is s; t _i is the interval time between the i-th suction cycle and the (i+1)-th suction cycle, the unit is s; ν _b (h) is the The penetration velocity of smoke oil at a distance h from the atomization surface, in cm/s; S(h) is the cross-sectional area of the porous matrix at a distance h from the atomization surface, The unit is cm ² .

In multiple consecutive puffing cycles of the above-mentioned atomizing core, the volume of e-liquid stored in the temporary storage part Q _cn , the volume of e-liquid consumed by atomization on the atomizing surface Q _xn , and the volume of e-liquid entering the atomizing core The volume of e-liquid Q _bn in the atomizer can always satisfy the above relationship, so that there is always an appropriate amount of e-liquid in the atomizing core, thereby effectively avoiding the phenomenon of core burning and oil frying during multiple consecutive puffing cycles. This can significantly improve the consumer experience.

The second aspect of this application provides an electronic atomization device, which has the atomization core provided in the first aspect of this application and a battery connected to the atomization core (100).

During the research process, the inventor of this application discovered that too much e-liquid content in the porous matrix can easily lead to "fried oil" and serious oil leakage, or that too little e-liquid content in the porous matrix can lead to a "burnt core" phenomenon. , giving the smoke a pasty smell.

When the electronic atomization device of the present application works, the volume of e-liquid stored in the temporary storage part, the volume of e-liquid actually atomized in a single puffing cycle, and the volume of e-liquid actually atomized in a single puffing cycle enter the porous matrix (10 The relationship between the volumes of e-liquid in ) is controlled within an appropriate range, which enables the electronic atomizer to operate continuously for multiple puffing cycles without burning the core or frying the oil. The user experience is good, and the electronic atomizer The device has a long service life. In addition, the smoke produced by this electronic atomization device tastes good and the smoke is full.

Description of drawings

Figure 1 is a schematic structural diagram of an atomizing core provided by an embodiment of the present application;

Figure 2 is a grayscale image of the atomizing core provided in Embodiment 1 of the present application from one perspective;

Figure 3 is a function curve of the e-liquid atomization quality of the atomizing core measured in Example 1 of the present application versus time;

Figure 4 is a grayscale diagram of the atomizing core provided in Embodiment 3 of the present application.

Detailed ways

At present, most electronic atomizer devices on the market have problems with "fried oil" and "burned core". "Frying oil" is caused by the accumulation of too much e-liquid on the atomizing surface in a short period of time, which causes the e-liquid on the atomizing surface to overboil during heating, resulting in a "frying oil" sound similar to that produced when water drips into an oil pan. . And when "frying", excess e-liquid will splash into the atomization chamber of the electronic atomization device. This causes liquid accumulation in the atomization chamber, seriously affecting the consumer's experience and causing a waste of e-liquid. The "burnt core" is caused by the dry burning of the heating element on the atomization surface, which produces a burnt smell, which will also seriously affect the consumer experience. In order to solve the above problems, embodiments of the present application provide an atomizing core.

Specifically, the technical solution of the present application will be described in detail below with reference to the accompanying drawings.

Please refer to Figure 1. The atomization core 100 includes a porous matrix 10 and a heating element 20. The porous matrix 10 has a liquid absorption surface 101 and an atomization surface 102. The heating element 20 is located on the atomization surface 102. The porous matrix 10 is defined as connected The liquid seepage part 103 and the temporary liquid storage part 104, the temporary liquid storage part 104 is close to the atomization surface 102, the temporary liquid storage part 104 is the maximum volume that can be atomized in one suction cycle of the atomization core 100 Q _c1 e-liquid occupies the volume of the porous matrix 10;

in,
Q _c1 =V×σ (1)

In any puffing cycle of continuous puffing, the atomizing core 100 satisfies:
Q _cn ≥Q _xn ≥Q _bn (2)

When n≥2,

Wherein, V is the volume of the temporary liquid storage part 104 in cm ³ ; σ is the porosity of the porous matrix 10 ; Q _cn represents the volume of e-liquid stored in the temporary liquid storage part 104 before the start of the nth puffing cycle, Q _xn represents the volume of e-liquid that is actually atomized in the n-th smoking cycle, Q _bn represents the volume of e-liquid that enters the porous matrix 10 in the n-th smoking cycle, the above-mentioned Q _cn , Q _xn and Q The units of _bn are all mL; i is any integer value between 1 and n; f(T _i ) represents the functional relationship between the mass of the actually atomized e-liquid and the puffing time in the i-th cycle; T _i is the duration of the i-th suction cycle, in s; t _i is the interval between the i-th suction cycle and the (i+1)-th suction cycle, in s; ν _b (h ) is the penetration velocity of the e-liquid in the porous matrix 10 at a distance h from the atomization surface 102, in cm/s; S(h) is the penetration velocity of the porous matrix 10 at a distance h from the atomization surface 102. Cross-sectional area in cm ² .

It should be noted that the e-liquid atomized in the i-th puff cycle all comes from the e-liquid that has been stored in the temporary liquid storage part 104 before the puff, and enters the porous matrix 10 in the i-th puff cycle. The e-liquid will be atomized in the (i+1)th puff cycle.

The definitions of the temporary liquid storage part 104 and Q _c1 are explained in detail below:

The portion of the volume of the porous matrix 10 occupied by the maximum volume Q _c1 of e-liquid that can be atomized in one puffing cycle of the atomizing core 100 is defined as the temporary liquid storage part 104 . That is, the maximum volume of e-liquid that can be atomized in one puff is at the upper liquid level in the atomization core 100. The distance between the liquid level and the atomization surface 102 is the plane where h _d is located and the atomization surface 102. , the entire space enclosed by part of the side walls of the porous matrix 10 is the temporary liquid storage part 104 (that is, the height of the temporary liquid storage part is h _d , see Figure 1 ). Naturally, the entire space enclosed by the plane where the upper liquid level of the e-liquid is located, the liquid suction surface 101 and part of the side walls of the porous base 10 is the liquid seepage portion 103 .

It can be understood that for each atomization core, the value of Q _c1 is determined. Moreover, the volume of the temporary liquid storage part 104 can be calculated through a mathematical formula based on the value of h _d and the structural characteristics of the atomization core. It can be understood that the critical condition for the core sticking phenomenon to occur is: during a single puff, the maximum volume Q _c1 of e-liquid that can be atomized in the temporary storage part 104 is equal to the volume of e-liquid actually consumed in that puff. The quantity _Q ' If Q _c1 is smaller than the above Q' _x1 , core burning will occur.

Therefore, assuming that core burning occurs when Th _h is continuously and evenly pumped, the height of the atomization surface 102 is recorded as 0, that is:

Again,
Q _c1 =V×σ=Q' _x1 (5)

In the above relational formula, ν _b (h) refers to the penetration speed of the e-liquid in the porous matrix 10 at a height h from the atomization surface 102, and is related to the viscosity of the e-liquid, the temperature of the e-liquid in the porous matrix 10, and the porous The pore structure (pore size distribution and porosity σ) of the matrix 10 is closely related and can be measured through the oil leakage experiment of the atomization core. Moreover, for existing atomizer cores, σ is a known parameter, or σ can also be measured experimentally.

_And _because Q _c1 at this time is equal _to Q' can be obtained, so the values of Th _h and h _d can be calculated by combining equations (4) and (5), and then the maximum volume Q _c1 of e-liquid that can be atomized in a smoking cycle and the temporary liquid storage part can be determined Volume V of 104.

It can be understood that when n ≥ 2, Q _cn is the amount of e-liquid stored in the temporary liquid storage part 104 after the atomizer core 100 has been continuously operated for (n-1) cycles, that is, before the start of the first cycle The total volume of e-liquid Q _c1 in the temporary liquid storage part 104 plus the total volume of e-liquid entering the porous matrix in (n-1) cycles (During the interval t _i between two adjacent puffing cycles, due to inertia, some smoke oil is also sucked into the porous matrix 10), minus the actual atomized smoke in (n-1) cycles. total volume of oil Thus we can get formula (3):

When n≥2,

In addition, the e-liquid that enters the porous matrix 10 in the i-th smoking cycle will be atomized in the (i+1)-th smoking cycle. Understandably, there is a critical condition for the "oil frying" phenomenon of the atomizing core 100 to occur. yes:

The volume of e-liquid Q' _b1 that enters the porous matrix 10 is equal to the total volume of the actual atomized e-liquid Q' _x1 . The total volume of e-liquid in the atomizing core 100 after the end of the smoking cycle is Q. _c1 -Q' _x1 +Q' _b1 , this value is equal to the capacity Q _c1 of the temporary liquid storage part 104 . If Q' _x1 <Q' _b1 , then Q _c2 > Q _c1 , at this time the smoke oil will overflow into the leakage part 103. However, excessive e-liquid content inside the porous matrix 10 will cause the e-liquid to accumulate on the atomization surface 102 in a short period of time, causing "fried oil". Therefore, in order to ensure that the atomizer core 100 In any of multiple consecutive suction cycles, the phenomenon of oil frying does not occur, and Q _xn ≥ Q _bn must be satisfied.

To sum up, it is controlled that before each puffing cycle starts, the temporary liquid storage part 104 contains a sufficient amount of e-liquid, so that the volume Q _xn of atomized e-liquid in each puff is less than or equal to The volume of stored e-liquid Q _cn can effectively avoid the occurrence of "burnt core" phenomenon. Controlling _the volume _of smoke oil _Q At the same time, there will be no "fried oil" phenomenon caused by excess e-liquid penetrating into the atomization surface 102 in a short period of time, which can significantly improve the consumer experience. In addition, the service life of the atomizing core 100 can also be extended.

In some embodiments of the present application, the above Q _bn satisfies the following relational formula: Q _bn =ν _b (h) × S (h) × T _n ×σ (Formula 6); where, ν _b (h) is the value in the porous matrix 10 The penetration velocity of e-liquid at a distance h from the atomization surface 102, in cm/s; S(h) is the cross-sectional area of the porous matrix 10 at a distance h from the atomization surface 102, in units cm ² .

In some embodiments of the present application, the above Q _xn satisfies the following relationship: Among them, f(T _n ) represents the functional relationship between the mass of the atomized e-liquid and the puffing time, and ρ is the density of the above-mentioned e-liquid in mg/mL. f(T _n ) can be measured through previous experiments. In some cases, the quality of the actual atomized e-liquid in the atomizer core at different time points is measured respectively, and the relationship curve between the quality of the actual atomized e-liquid and time is obtained. f(T _n ), and then substitute the density of the e-liquid used, the Q _xn of the atomizing core 100 can be obtained.

In some embodiments of the present application, the above _ti satisfies the following relationship: Generally, if a user takes multiple puffs of cigarettes continuously, the duration of a single puff is generally 2.0s-2.5s. The interval between two adjacent puffs generally has a certain length of time requirement, for example, it ranges from greater than 0s to less than or equal to the range of 1s. By limiting t _i to the above range, it is convenient to define whether multiple puffing actions performed by the user are considered continuous puffing.

In some embodiments of the present application, the above _ti is less than or equal to 0.6s.

In some embodiments of the present application, the above _Ti is less than or equal to 3s. Generally speaking, when consumers use electronic atomizers to smoke e-liquid, they can obtain a more comfortable experience when the single puff duration does not exceed 3 seconds.

In some embodiments of the present application, the above n is less than or equal to 15. At this time, the atomizing core 100 will not suffer from core burning during no more than 15 consecutive puffing cycles.

In some specific embodiments, when the duration of each puffing cycle is 3 seconds, the interval between two adjacent puffing cycles is 0.6 seconds, and the atomizing core 100 does not smoke for 15 consecutive cycles. The phenomenon of core burning and oil frying occurs.

In some embodiments of the present application, the porosity σ of the porous matrix 10 is in the range of 40%-60%. Illustratively, the porosity of the porous matrix 10 may be 40%, 45%, 50%, 55%, 60%, etc. By controlling the porosity of the porous matrix 10, not only can the total volume of e-liquid entering the porous matrix 10 be directly controlled in each smoking cycle, but the conduction of the e-liquid in the liquid seepage part 103 and the temporary liquid storage part 104 can also be changed. rate, so that the Q _bn of the atomizing core 100 can be further adjusted in a suitable range inside, and allows the e-liquid to be transmitted to the atomization surface 102 faster and better, thereby achieving a fast and excellent atomization effect, and also helping to ensure that the atomization core 100 does not burn the core or fry the oil.

In some specific embodiments, the porosity σ everywhere inside the porous matrix 10 may be the same or different. This parameter can be determined based on the shape, size and actual use requirements of the porous matrix.

In some embodiments of the present application, the volume V of the temporary liquid storage part 104 is in the range of 0.01cm ³ -0.2cm ³ . In some specific embodiments, V is in the range of 0.01 cm ³ -0.1 cm ³ . For example, the above V can be 0.01cm ³ , 0.02cm ³ , 0.03cm ³ , 0.04cm ³ , 0.05cm ³ , 0.1cm ³ , 0.15cm ³ , 0.2cm ³ and so on. By adjusting the dimensions of the porous matrix 10 and the pore structure and distribution of the porous matrix 10, V can be controlled within the above range, which is beneficial to ensuring that the atomizing core 100 can provide an appropriate amount of e-liquid for atomization in each smoking cycle. , which can ensure that the core is not burned and the oil is not fried, thereby improving the user's smoking experience.

In some embodiments of the present application, Qc ₁ is in the range of 0.004cm ³ -0.12cm ³ . In some specific embodiments, Qc ₁ is in the range of 0.004cm ³ -0.06cm ³ . For example, the above Qc ₁ 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 , 0.08 cm ³ , 0.09cm ³ , 0.1cm ³ , 0.12cm ³ etc. Controlling Qc ₁ within the above range is beneficial to controlling the atomizing core 100 to provide an appropriate amount of e-liquid in each puffing cycle, so that the user can obtain a good usage experience.

In some embodiments of the present application, the penetration speed ν _b (h) of the e-liquid in the porous matrix 10 at a distance h from the atomization surface 102 is in the range of 0.01 cm/s-0.2 cm/s. In some specific embodiments, the penetration speed ν _b (h) of the e-liquid in the porous matrix 10 at a distance h from the atomization surface 102 is in the range of 0.01 cm/s-0.1 cm/s. For example, the above ν _b (h) can be 0.01cm/s, 0.02cm/s, 0.03cm/s, 0.04cm/s, 0.05cm/s, 0.1cm/s, 0.15cm/s, 0.2cm/ s etc. Controlling the penetration rate ν _b (h) throughout the porous matrix 10 within the above range is beneficial to controlling the total volume Q _bn of e-liquid entering the porous matrix 10 in each puffing cycle within an appropriate range, and is also beneficial to Ensure that the conduction rate of the e-liquid in the porous matrix 10 is appropriate, so that the e-liquid can enter the temporary liquid storage part 104 within the expected time, which is beneficial to ensuring that the atomizer core 100 does not explode in multiple consecutive suction cycles. The paste core is conducive to the conversion of e-liquid into smoke with a delicate taste, thereby improving the user's smoking experience.

In this application, ν _b (h) at different heights h from the porous matrix 10 to the atomization surface 102 may be the same or different. Among them, ν _b (h) can gradually decrease along the penetration direction of e-liquid, or it can remain unchanged and then decrease, or it can change in a gradient.

In some embodiments of the present application, the liquid-absorbing surface (101) and the atomizing surface (102) are arranged oppositely, and along the extending direction perpendicular to the liquid-absorbing surface (101) to the atomizing surface (102), the liquid-permeable portion The maximum cross-sectional area of the temporary liquid storage portion 103 is smaller than the maximum cross-sectional area of the temporary liquid storage portion 104 . The maximum cross-sectional area of the liquid seepage portion 103 is smaller than the maximum cross-sectional area of the temporary liquid storage portion 104, which is conducive to further controlling the volume of e-liquid entering the temporary liquid storage portion 104 from the liquid seepage portion 103 per unit time, thus enabling better avoid Avoid "fried oil" phenomenon.

In some embodiments of the present application, the porous matrix (10) has a cross-section along the extending direction perpendicular to the liquid-absorbing surface (101) to the atomization surface (102), and the cross-sectional area of the porous matrix 10 is along the liquid-absorbing surface 101 The extending direction toward the atomization surface 102 remains unchanged at first and then increases. At this time, the longitudinal section of the porous matrix (the longitudinal section is parallel to the extending direction from the liquid suction surface 101 to the atomization surface 102 of the porous matrix 10) is in a "step-like" shape, which is beneficial to controlling the continuous flow of e-liquid in the temporary liquid storage part 104. , evenly penetrate into the atomization surface 102, so that consumers can obtain a better use experience.

In some embodiments of the present application, the porous matrix (10) has a cross-section along the extending direction perpendicular to the liquid-absorbing surface (101) to the atomization surface (102), and the cross-sectional area of the porous matrix 10 is along the liquid-absorbing surface 101 The direction of extension toward the atomization surface 102 gradually increases. At this time, the shape of the porous matrix 10 can be a prism, which can also better control the e-liquid in the temporary liquid storage part 104 to continuously and evenly penetrate into the atomization surface 102, so that consumers can obtain a better use experience. .

In this application, the shape of the longitudinal section of the porous substrate 10 (the longitudinal section is parallel to the direction in which the liquid absorption surface 101 of the porous substrate 10 extends to the atomization surface 102) can be an inverted "T" shape, a trapezoid, multiple trapezoids, or a rectangle. Irregular patterns, etc., the side wall of the porous matrix 10 (referring to the part of the porous matrix 10 located between the liquid suction surface 101 and the atomization surface 102, the side wall connects the liquid suction surface 101 and the atomization surface 102) can be a plane or a flat surface. It is a curved surface, and the shapes of the liquid suction surface 101 and the atomization surface 102 are not specifically limited. Among them, the liquid suction surface 101 and the atomization surface 102 can be arranged oppositely. Those skilled in the art can make selections based on actual production needs.

In some embodiments of the present 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 network.

In some embodiments of the present application, the material of the porous matrix 10 includes but is not limited to at least one of porous ceramics and oil-conducting cotton. The porous matrix 10 can be porous ceramics, or the porous matrix 10 can be oil-conducting cotton, or the porous matrix 10 It is composed of porous ceramics and oil-conducting cotton.

The embodiment of the present application also provides an electronic atomization device, which has the atomization core 100 provided by the embodiment of the present application and a battery connected to the atomization core (100).

When the electronic atomization device is working, smoke oil, etc. are introduced through the porous matrix to the heating element arranged on it. When the heating element is heated, the smoke can be evaporated. Due to the use of the aforementioned atomizing core, the electronic atomizing device does not burn the core or fry the oil when continuously operating for multiple suction cycles, thereby providing a good user experience and a long service life of the electronic atomizing device. In addition, the smoke produced by this electronic atomization device tastes good and the smoke is full.

The technical solution of the present application will be described in detail below with reference to specific embodiments.

Example 1

Embodiment 1 provides an atomizing core. The grayscale image of the atomizing core from a certain viewing angle can be seen in Figure 2 .

The atomization core is in the shape of an inverted "T" and has a liquid suction surface and an atomization surface arranged oppositely. A heating element is provided on the atomization surface. The liquid suction surface is provided on the upper surface of the porous substrate (the largest cross-sectional dimension A smaller surface, in which the cross section is a cross section perpendicular to the extending direction from the liquid suction surface to the atomization surface), and the atomization surface is arranged on the lower surface of the porous matrix (the surface with a larger maximum cross-sectional dimension, The cross section is the cross section perpendicular to the extending direction from the liquid suction surface to the atomization surface). The atomization core has a temporary liquid storage part with a volume V (the temporary liquid storage part is the entire space enclosed by the plane at a distance h _d from the atomization surface, the atomization surface, and the side walls of the porous matrix, and the liquid seepage part is the part of the porous matrix excluding the temporary liquid storage part), that is, the maximum volume Q _c1 of e-liquid that can be atomized in one puffing cycle of the atomizer core occupies the volume of the porous matrix V. The size of the liquid suction surface of the atomizer core is 4.8mm×2.2mm, the size of the atomization surface is 8.0mm×3.0mm, the thickness dimension _h1 of the upper cuboid is 2.5mm, and the thickness dimension _h2 of the lower cuboid is 0.8mm. , the heating element is a metal heating wire set on the atomization surface by screen printing. Among them, the porosity σ of the porous matrix is 58%, and the density ρ of the e-liquid used is 1.1 mg/mL.

The above-mentioned atomizer core was subjected to a smoke collection test, and the results of the smoke collection test at different times are shown in Figure 3. After further fitting, the functional relationship between the amount of e-liquid atomization and the puffing time is obtained: (Equation 7). At the same time, according to the oil leakage experimental test, the penetration rate of e-liquid in the porous matrix was measured to be 2.8×10 ^-2 cm/s. And because the critical condition for the occurrence of scorching phenomenon is: the liquid level position of the e-liquid at the end of a single puff coincides with the atomization surface, that is, assuming that scorching occurs when _Th is continuously and evenly puffed, the atomization surface is 102 The height at is recorded as 0, then there is:
Q _c1 =V×σ (1)

Again,
ν _b (h)×T _h =T _d (8)

Substituting the above measured results into equations (1), (4), and (8) respectively, we have:

0.28×T _h = h _d

Among them, h _d =1.23×10 ^-1 cm and T _h =4.53 s are obtained. According to h _d , V=21.8596×10 ^-3 cm ³ can be calculated.

Furthermore, Q _bn =ν _b (h) × S (h) × T _n ×σ (Formula 6). Then, when the length of a single suction cycle _Ti is 3s, the above values are substituted into equations (1), (6), and (7) respectively, and Q _c1 , Q _x1 and Q _b1 are calculated to be 12.67×10 ^-3 mL respectively. , 6.39×10 ^-3 mL, 5.14×10 ^-3 mL, satisfying Q _c1 ≥ _{Q x1} ≥ Q _b1 .

When two puffs of the atomizer core are sucked continuously, the interval _t1 between the second puffing cycle and the first puffing cycle is 0.6s. Substitute into Equation (3) Q _c2 =12.44×10 ^-3 mL is calculated, and Q _x2 and Q _b2 are 6.39×10 ^-3 mL and 5.14×10 ^-3 mL respectively, which also satisfies Q _c2 ≥ Q _x2 ≥ _{Q b2} .

When the atomizer core is continuously pumped for 15 times, the interval t ₁₄ between the 15th and 14th puffing cycles is also 0.6s (T ₁₅ = 3s, t ₁₄ = 0.6s). According to the aforementioned formula (3), it can be Q _c15 was calculated to be 9.45×10 ^-3 mL, and Q _x15 was measured at the same time and Q _b15 are 6.39 × 10 ^-3 mL and 5.14 × 10 ^-3 mL respectively. It can be seen that Q _c15 ≥ Q _x15 ≥ _{Q b15} is satisfied. Therefore, the atomizer core will not burn the core or fry the oil even after 15 consecutive puffs.

Example 2

Embodiment 2 provides an atomizing core. The structural features and dimensions of the atomizing core are consistent with those of Embodiment 1. The porosity σ of the porous matrix is 40%, and the density ρ of the e-liquid used is 1.1 mg/mL.

The above-mentioned atomizer core was also tested for smoke collection and collection, and the functional relationship between the amount of e-liquid atomization and the puff time was obtained by fitting: At the same time, according to the oil leakage experimental test, the penetration rate of e-liquid in the porous matrix was measured to be 2.5×10 ^-2 cm/s. Substituting the above measured results into equations (1), (4), and (8) respectively, we get:

0.25×T _h = h _d

It is found that h _d =1.04×10 ^-1 cm, T _h =4.17s. That is, the temporary liquid storage part is the entire space enclosed by the plane at a height of 1.04×10 ^-1 cm from the atomization surface, the atomization surface, and the side walls of the porous matrix. According to h _d = 1.04 × 10 ^-1 cm, the volume of the temporary liquid storage part can be calculated V = 21.7344 × 10 ^-3 cm ³ . When the length of a single suction cycle _Ti is 3 s, Q _c1 , Q _x1 and Q _b1 are respectively 8.71×10 ^-3 mL, 4.51×10 ^-3 mL, 3.17×10 ^-3 mL, satisfying Q _c1 ≥ Q _x1 ≥ Q _b1 .

When the second puff is taken continuously, the interval t ₁ from the first puff cycle is 0.6s, and Q _c2 , Q _x2 and Q _b2 can be obtained as 8.43×10 ^-3 mL, 4.51×10 ^-3 mL and 3.17 respectively. ×10 ^-3 mL, it also satisfies Q _c2 ≥Q _x2 ≥Q _b2 .

When the 15th puff is taken continuously (T ₁₅ = 3s, t ₁₄ = 0.6s), Q _c15 , Q _x15 and Q _b15 can be obtained as 4.84×10 ^-3 mL, 4.51×10 ^-3 mL and 3.17×10 respectively. ^-3 mL, which satisfies Q _c15 ≥ Q _x15 ≥ _{Q b15} , so the atomizer core will not burn or fry even after 15 consecutive puffs.

Example 3

Embodiment 3 provides an atomizing core, the atomizing core is in the shape of a pyramid (as shown in Figure 4). The size of the liquid suction surface of the atomizing core is 5.0mm×4.0mm, the size of the atomizing surface is 10.0mm×4.0mm, and the trapezoidal thickness h is 5.0mm. The longitudinal section of the atomizer core is an isosceles trapezoid, and the height of the isosceles trapezoid is h ₃ and the width is (10-h ₃ ). The heating element is a metal heating wire arranged on the atomization surface by screen printing. The porosity σ of the porous matrix is 58%, the density ρ of the smoke oil used is 1.1 mg/mL, and the penetration speed of the smoke oil in the porous matrix is 1.8×10 ^-2 cm/s. The functional relationship between the amount of e-liquid atomization and the puffing time is obtained by fitting: Substituting the above measured results into equations (1), (4), and (8) respectively, we have:

0.18T _h = h _d

It is found that h _d =1.28×10 ^-1 cm, T _h =7.09s. That is, the temporary liquid storage part is the entire space enclosed by the plane at a height of 1.28×10 ^-1 cm from the atomization surface, the atomization surface, and the side walls of the porous matrix. The volume of the temporary liquid storage part is V=47.8217×10 ^-3 cm ³ . When the length of a single suction cycle _Ti is 3s, the calculated Q _c1 , Q _x1 and Q _b1 are 27.741×10 ^-3 mL, 8.55×10 ^-3 mL and 6.26×10 ^-3 mL respectively, which satisfies Q _c1 ≥ Q _x1 ≥Q _b1 .

When the second puff is taken continuously, the interval t ₁ from the first puff cycle is 0.6s, and Q _c2 , Q _x2 and Q _b2 can be obtained as 27.61×10 ^-3 mL, 8.55×10 ^-3 mL and 6.26 respectively. ×10 ^-3 mL, it also satisfies Q _c2 ≥Q _x2 ≥Q _b2 .

When the 15th puff is taken continuously (T ₁₅ = 3s, t ₁₄ = 0.6s), Q _c15 , Q _x15 and Q _b15 can be obtained as 25.97×10 ^-3 mL, 8.55×10 ^-3 mL and 6.26×10 respectively. ^-3 mL, which satisfies Q _c15 ≥ Q _x15 ≥ _{Q b15} , so the atomizer core will not burn or fry even after 15 consecutive puffs.

Example 4

Embodiment 4 provides an atomizing core, the structural features and dimensions of the atomizing core are consistent with those of Embodiment 3. The porosity σ of the porous matrix is 58%, the density ρ of the smoke oil used is 1.1 mg/mL, and the penetration speed of the smoke oil in the porous matrix is 0.011 cm/s. The functional relationship between the amount of e-liquid atomization and the puffing time is obtained by fitting: Substituting the above measured results into equations (1), (4), and (8) respectively, we have:

0.11T _h = h _d

It is found that h _d =7.18×10 ^-1 cm, T _h =6.53s. That is, the temporary liquid storage part is the entire space enclosed by the plane at a height of 7.18×10 ^-1 cm from the atomization surface, the atomization surface, and the side walls of the porous matrix. The volume of the temporary liquid storage part is V=23.168×10 ^-3 cm. ³ . When the length of a single suction cycle _Ti is 3s, Q _c1 , Q _x1 and Q _b1 are 16.06×10 ^-3 mL, 5.85×10 ^-3 mL and 3.83×10 ^-3 mL respectively, satisfying Q _c1 ≥ Q _x1 ≥ Q _b1 .

When the second puff is taken continuously, the interval t ₁ from the first puff cycle is 0.6s, and Q _c2 , Q _x2 and Q _b2 can be obtained as 15.35×10 ^-3 mL, 5.85×10 ^-3 mL and 3.83 respectively. ×10 ^-3 mL, it also satisfies Q _c2 ≥Q _x2 ≥Q _b2 .

When the 15th puff is taken continuously (T ₁₅ = 3s, t ₁₄ = 0.6s), Q _c15 , Q _x15 and Q _b15 can be obtained as 6.23×10 ^-3 mL, 5.85×10 ^-3 mL and 3.83×10 respectively. ^-3 mL, which satisfies Q _c15 ≥ Q _x15 ≥ _{Q b15} , so the atomizer core will not burn or fry even after 15 consecutive puffs.

The above descriptions are exemplary embodiments of the present application. It should be noted that, for those of ordinary skill in the art, Without departing from the principles of this application, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of this application.

Claims

An atomizing core (100), characterized in that the atomizing core (100) includes:

A porous matrix (10) having a liquid absorption surface (101) and an atomization surface (102); and

Heating element (20), the heating element (20) is provided on the atomization surface (102),

Wherein, the porous matrix (10) is defined as being divided into a connected liquid permeable part (103) and a temporary liquid storage part (104), and the temporary liquid storage part (104) is close to the atomization surface (102), and the The temporary liquid storage part (104) is the part of the volume of the porous matrix (10) occupied by the maximum volume Q c1 of e-liquid that can be atomized in one puffing cycle of the atomizing core (100). ;

in,

Q c1 =V×σ (1)

In any puffing cycle of continuous puffing, the atomizing core (100) satisfies:

Q cn ≥Q xn ≥Q bn (2)

When n≥2,

Wherein, V is the volume of the temporary liquid storage part (104) in cm 3 ; σ is the porosity of the porous matrix (10); Q cn represents the temporary liquid storage before the nth suction cycle starts. The volume of e-liquid stored in the part (104), Q xn represents the volume of e-liquid actually atomized in the nth smoking cycle, Q bn represents the volume of e-liquid that enters the porous matrix (10 ), the units of Q cn , Q c1 , Q xn and Q bn are all mL; i is any integer value between 1 and n; f (T i ) represents the i-th cycle , the functional relationship between the quality of the actually atomized e-liquid and the puffing time; T i is the duration of the i-th puffing cycle, in s; t i is the i-th puffing cycle and the (i+ 1) The interval between puffing cycles, the unit is s; ν b (h) is the penetration of e-liquid in the porous matrix (10) at a distance h from the atomization surface (102) Speed, unit is cm/s; S(h) is the cross-sectional area of the porous matrix (10) at a distance h from the atomization surface (102), unit is cm 2 .
The atomizing core (100) according to claim 1, characterized in that the Q bn satisfies the following relationship: Q bn =ν b (h) × S (h) × T n × σ.
The atomizing core (100) according to claim 1, characterized in that the Q xn satisfies the following relationship: Among them, ρ is the density of the e-liquid, and the unit is mg/mL.
The atomizing core (100) according to claim 1, characterized in that said ti satisfies the following relational formula:
The atomization core (100) according to claim 1, characterized in that the Qc 1 is in the range of 0.004cm 3 -0.12cm 3 within the perimeter.
The atomization core (100) according to claim 1, characterized in that the σ is in the range of 40%-60%.
The atomization core (100) according to claim 1, characterized in that the ν b (h) is in the range of 0.01cm/s-0.2cm/s.
The atomization core (100) according to claim 1 or 4, characterized in that the ti is less than or equal to 0.6s.
The atomization core (100) according to claim 1, wherein n is less than or equal to 15.
The atomization core (100) according to claim 1, characterized in that the Ti is less than or equal to 3s.
The atomizing core (100) according to claim 1, characterized in that the liquid-absorbing surface (101) and the atomizing surface (102) are arranged oppositely, along a direction perpendicular to the liquid-absorbing surface (101) to the atomizing surface. In the extending direction of the surface (102), the maximum cross-sectional area of the liquid permeable portion (103) is smaller than the maximum cross-sectional area of the temporary liquid storage portion (104).
The atomization core (100) according to claim 11, characterized in that the porous matrix (10) has a cross-section along the extending direction perpendicular to the liquid absorption surface (101) to the atomization surface (102), The cross-sectional area of the porous matrix (10) gradually increases along the extending direction of the liquid suction surface (101) to the atomization surface (102), or the cross-sectional area of the porous matrix (10) increases along the direction of the suction surface (102). The extending direction of the liquid level (101) toward the atomization surface (102) first remains unchanged and then increases.
An electronic atomization device, characterized in that the electronic atomization device has the atomization core (100) according to any one of claims 1 to 12 and a battery connected to the atomization core (100).