Porous body, atomizer, and electronic atomization device

Abstract

This application discloses a porous body, an atomizer, and an electronic atomization device. The atomizer includes: a liquid storage chamber for storing a liquid matrix; a porous body in fluid communication with the liquid storage chamber to receive the liquid matrix; and a heating element attached to the porous body to heat at least a portion of the liquid matrix within the porous body to generate an aerosol. The volume of micropores with a pore size greater than 30 μm within the porous body accounts for more than 40% of the total volume of all micropores in the porous body. This atomizer, employing a porous body with a larger pore size than typical micropores, generates aerosol particles with a larger diameter, which are more likely to adhere to taste receptors in the oral cavity, thus enhancing taste perception.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, and more particularly to a porous body, an atomizer, and an electronic atomization device. Background Technology

[0002] Tobacco products (such as cigarettes, cigars, etc.) produce tobacco smoke by burning tobacco during use. Efforts are being made to replace these tobacco-burning products by creating products that release compounds without combustion.

[0003] Examples of such products are heating devices that release compounds by heating rather than burning materials. For example, the material could be tobacco or other non-tobacco products, which may or may not contain nicotine. As another example, aerosol-providing articles exist, such as so-called electronic atomizing devices. These devices typically contain a liquid that is heated to vaporize, thereby producing an inhalable aerosol. The liquid may contain nicotine and / or flavorings and / or aerosol-generating substances (e.g., glycerin). Known electronic cigarette devices typically do not contain flavorings other than those in the liquid. Summary of the Invention

[0004] One embodiment of this application provides an atomizer, comprising:

[0005] A liquid storage chamber is used to store a liquid matrix;

[0006] A porous body, in fluid communication with the liquid storage cavity to receive the liquid matrix;

[0007] A heating element, attached to the porous body, heats at least a portion of the liquid matrix within the porous body to generate an aerosol;

[0008] The volume of micropores with a pore size greater than 30µm in the porous body accounts for more than 40% of the total volume of all micropores in the porous body.

[0009] In a preferred embodiment, the average pore size of the micropores in the porous body is between 35µm and 70µm.

[0010] In a preferred embodiment, the pore size of the micropores in the porous body ranges from 1µm to 300µm.

[0011] In a preferred embodiment, the volume of micropores with a pore size between 30µm and 65µm in the porous body accounts for more than 50% of the total volume of all micropores in the porous body.

[0012] In a preferred embodiment, the volume of micropores with a pore size between 30µm and 100µm in the porous body accounts for more than 60% of the total volume of all micropores in the porous body.

[0013] In a preferred embodiment, the volume of micropores with a pore size greater than 70µm in the porous body accounts for more than 15% of the total volume of all micropores in the porous body.

[0014] In a preferred embodiment, the volume of micropores with a pore size greater than 100µm in the porous body accounts for 2% to 10% of the total volume of all micropores in the porous body.

[0015] In a preferred embodiment, the volume of micropores with a pore size of less than 30µm in the porous body accounts for less than 30% of the total volume of all micropores in the porous body.

[0016] In a preferred embodiment, the volume of micropores with a pore size between 10 and 30 µm in the porous body accounts for 5 to 20% of the total volume of all micropores in the porous body.

[0017] In a preferred embodiment, the volume of micropores with a pore size of less than 10µm in the porous body accounts for less than 5% of the total volume of all micropores in the porous body.

[0018] In a preferred embodiment, the porosity of the porous body is 35% to 75%.

[0019] In a preferred embodiment, the water absorption rate of the porous body is 30% to 70%.

[0020] In a more preferred embodiment, the proportion of substantially spherical micropores in the porous body 30 / 30a / 30b is not less than 30% of the total number of micropores. That is, during preparation, the proportion of substantially spherical particles in the pore-forming agent is not less than 30% of the total particles; this is advantageous for promoting uniform transfer of the liquid matrix. The substantially spherical pore-forming agent or micropores mentioned above are pore-forming agent particles or micropores with a sphericity greater than 0.8. The term "sphericity" is a parameter characterizing the morphology of an object such as the above-mentioned particles or pores, and can be calculated by the ratio of the surface area of ​​a sphere of the same volume to the surface area of ​​the particle or pore. The sphericity of a standard sphere is equal to 1, and the sphericity of other objects is less than 1; the closer the morphology of a particle or pore is to a sphere, the closer its sphericity is to 1.

[0021] In a preferred embodiment, the porous body is rigid.

[0022] In a preferred embodiment, the porous body is a porous ceramic body.

[0023] In a preferred embodiment, the heating element is a conductive trace printed, embossed, or deposited on the porous body.

[0024] In a preferred embodiment, the porous body has a flat, extended atomizing surface, and the heating element is a planar heating element attached to the atomizing surface; the extension dimension of the heating element along the length direction of the atomizing surface is greater than 75% of the length dimension of the atomizing surface.

[0025] In a preferred embodiment, the porous body further includes a liquid channel or groove extending through the porous body along its length;

[0026] At least a portion of the inner surface of the liquid channel or groove is configured as a liquid-absorbing surface in fluid communication with the liquid reservoir for absorbing the liquid matrix.

[0027] In a preferred embodiment, the porous body has a first surface and a second surface that are opposite to each other; wherein,

[0028] The first surface is configured as a liquid-absorbing surface in fluid communication with the liquid storage chamber for absorbing liquid matrix; the second surface is configured as an atomizing surface, and the heating element is attached to the second surface; the distance between the first surface and the second surface is between 1 and 5 mm.

[0029] Another embodiment of this application proposes an electronic atomization device, including an atomizer for atomizing a liquid matrix to generate an aerosol, and a power supply mechanism for supplying power to the atomizer; characterized in that the atomizer includes the atomizer described above.

[0030] Another embodiment of this application proposes a porous body for an atomizer; the volume of micropores with a pore size greater than 30µm in the porous body accounts for more than 40% of the total volume of all micropores in the porous body.

[0031] The above atomizers use porous bodies with larger pore sizes than typical micropores. The atomized aerosol particles are larger in size, making them easier to adhere to taste receptors in the mouth, which is beneficial for enhancing taste sensation. Attached Figure Description

[0032] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0033] Figure 1 This is a schematic diagram of the structure of an electronic atomizing device provided in one embodiment;

[0034] Figure 2 yes Figure 1 A cross-sectional schematic diagram of an embodiment of a central atomizer;

[0035] Figure 3 yes Figure 2 A schematic diagram of a porous body from one perspective;

[0036] Figure 4 yes Figure 2 A schematic diagram of the porous structure from another perspective;

[0037] Figure 5 This is a schematic diagram of the porous body from one perspective of another embodiment;

[0038] Figure 6 yes Figure 1 A cross-sectional schematic diagram of yet another embodiment of the atomizer;

[0039] Figure 7 This is a cross-sectional microstructure diagram of a porous body according to one embodiment;

[0040] Figure 8 This is a microscopic morphology diagram of a cross-section of a porous body according to another embodiment;

[0041] Figure 9 This is a comparison chart of the aerosol particle size generated by atomized liquid matrix in one embodiment and a comparative embodiment.

[0042] Figure 10 This is a comparison diagram of the aerosol particle size distribution generated by atomized liquid matrix in one embodiment and a comparative embodiment.

[0043] Figure 11 This is a comparison chart of the aerosol particle size distribution generated by atomized liquid matrix in another embodiment and a comparative example. Detailed Implementation

[0044] To facilitate understanding of this application, a more detailed description of this application will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0045] In an alternative implementation, such as Figure 1 As shown, the power supply mechanism 200 includes a receiving cavity 270 disposed at one end along the length direction for receiving and accommodating at least a portion of the atomizer 100, and a first electrical contact 230 exposed at least partially on the surface of the receiving cavity 270 for electrically connecting with the atomizer 100 when at least a portion of the atomizer 100 is received and accommodated within the power supply mechanism 200, thereby supplying power to the atomizer 100.

[0046] according to Figure 1 In the preferred embodiment shown, a second electrical contact 21 is provided on the end of the atomizer 100 opposite to the power supply mechanism 200 along the length direction. When at least a portion of the atomizer 100 is received in the receiving cavity 270, the second electrical contact 21 becomes conductive by contacting and abutting against the first electrical contact 230.

[0047] A sealing element 260 is provided inside the power supply mechanism 200, and the sealing element 260 divides at least a portion of the internal space of the power supply mechanism 200 to form the receiving cavity 270. Figure 1In the preferred embodiment shown, the seal 260 is configured to extend along the cross-sectional direction of the power supply mechanism 200, and is preferably made of a flexible material such as silicone, thereby preventing the liquid matrix that seeps from the atomizer 100 into the receiving chamber 270 from flowing into components such as the controller 220 and sensor 250 inside the power supply mechanism 200.

[0048] exist Figure 1 In the preferred embodiment shown, the power supply mechanism 200 further includes a battery cell 210 for power supply that is located away from the receiving cavity 270 along its length; and a controller 220 disposed between the battery cell 210 and the receiving cavity, the controller 220 being operable to guide current between the battery cell 210 and the first electrical contact 230.

[0049] The power supply mechanism 200 includes a sensor 250 for sensing the airflow generated when the user inhales into the atomizer 100, and then the controller 220 controls the battery cell 210 to output current to the atomizer 100 according to the detection signal of the sensor 250.

[0050] Further in Figure 1 In the preferred embodiment shown, the power supply mechanism 200 is provided with a charging interface 240 at the other end away from the receiving cavity 270 for charging the battery cell 210.

[0051] Figures 2 to 4 The embodiments are shown Figure 1 A schematic diagram of one embodiment of the atomizer 100, which includes a main housing 10, a porous body 30 and a heating element 40.

[0052] according to Figure 2 As shown, the main housing 10 is roughly in the shape of a flat cylinder, and its interior is hollow, used to store the atomized liquid matrix and house other necessary functional devices; the upper end of the main housing 10 is provided with a suction nozzle A for drawing aerosol.

[0053] The main housing 10 has a liquid storage chamber 12 for storing liquid matrix inside; in a specific implementation, the main housing 10 has a flue gas transmission pipe 11 arranged along the axial direction, and the space between the outer wall of the flue gas transmission pipe 11 and the inner wall of the main housing 10 forms the liquid storage chamber 12 for storing liquid matrix; the upper end of the flue gas transmission pipe 11 relative to the proximal end 110 is connected to the suction port A.

[0054] The porous body 30 is used to obtain the liquid matrix in the storage chamber 12 through the liquid guide hole 13, and the liquid matrix is ​​transferred as follows: Figure 2 As indicated by the middle arrow R1, the porous body 30 has a flat atomizing surface 310 on which a heating element 40 is formed to heat at least a portion of the liquid matrix absorbed by the porous body 30 to generate an aerosol.

[0055] After assembly, the two ends of the heating element 40 are in contact with the second electrical contact 21, thus conducting electricity. During energization, the heating element 40 heats at least a portion of the liquid matrix of the porous body 30 to generate an aerosol. In optional embodiments, the porous body 30 includes flexible fibers, such as cotton fibers, nonwoven fabrics, fiberglass ropes, etc., or includes porous ceramics with a microporous structure, such as… Figure 3 and Figure 4 The porous ceramic body 30 of the shape shown has a side of the porous body 30 facing away from the atomizing surface 310 that is in fluid communication with the liquid guiding hole 13 to absorb the liquid matrix, and then transfer the liquid matrix to the atomizing surface 310 for heating and atomization.

[0056] See further details Figure 3 and Figure 4 In the embodiment shown, the porous body 30 has a first sidewall 31 and a second sidewall 32 opposite to each other along the thickness direction, and a liquid channel 33 extending between the first sidewall 31 and the second sidewall 32. The two ends of the liquid channel 33 are in fluid communication with the liquid storage chamber 12 through the liquid guide hole 13 to receive the liquid matrix. Then the liquid matrix is ​​absorbed into the porous body 30 through the inner surface of the liquid channel 33 and finally transferred to the atomizing surface 310 for heating and atomization.

[0057] Alternatively, in some variations, the liquid channel 33 is formed on the surface of the porous body 30 and extends through a groove in the porous body 30.

[0058] The porous body 30 also has a flat, extending surface 320, which is arranged parallel to the atomizing surface 310. Furthermore... Figure 3 and Figure 4 In this embodiment, surface 320 is adjacent to and defines liquid channel 33, and after assembly, surface 320 is in fluid communication with liquid storage cavity 12. Surface 320 is configured as a liquid-absorbing surface capable of being wetted or absorbed by a liquid matrix into porous body 30. In this embodiment, the distance between atomizing surface 310 and surface 320 is between 1 and 5 mm.

[0059] The heating element 40 can be bonded to the atomization surface 310 of the porous body 30 by means of printing, deposition, sintering or physical assembly. In some other variations, the porous body 30 can have a planar or curved surface for supporting the heating element 40, and the heating element 40 is formed on the planar or curved surface of the porous body 30 by means of mounting, printing, deposition or other methods.

[0060] In this implementation, the heating element 40 substantially covers the extended length of the atomizing surface 310; specifically, the length d1 of the atomizing surface 310 is 6.7 mm, and the extended length d2 of the heating element 40 is 5.22 mm. Figure 4 The extension length d2 along the length direction of the atomizing surface 310 is greater than 75% of the extension length d1 of the atomizing surface 310.

[0061] The heating element 40 can be made of a metal, metal alloy, graphite, carbon, conductive ceramic, or other composite material of ceramic and metal materials with appropriate resistance. Suitable metals or alloys include at least one of nickel, cobalt, zirconium, titanium, nickel alloys, cobalt alloys, zirconium alloys, titanium alloys, nickel-chromium alloys, nickel-iron alloys, iron-chromium alloys, iron-chromium-aluminum alloys, titanium alloys, iron-manganese-aluminum based alloys, or stainless steel. The resistive material of the heating element 40 can be selected from metals or alloys with a suitable temperature coefficient of resistance, such as a positive or negative temperature coefficient, so that the heating circuit can both generate heat and serve as a sensor for sensing the real-time temperature of the atomizing component.

[0062] Alternatively, in other variations, the porous body 30 can take on more regular or irregular shapes. For example… Figure 5 A schematic diagram of a porous body 30a in another embodiment is shown. The porous body 30a is plate-shaped or sheet-shaped, and one surface along its thickness direction is configured as an atomizing surface 310a. A heating element 40a is attached to the atomizing surface 310a to heat and atomize the liquid matrix to generate an aerosol for inhalation. The surface 320a of the porous body 30a facing away from the atomizing surface 310a is in fluid communication with the liquid storage chamber 12 after assembly, and thus serves as a liquid-absorbing surface for absorbing the liquid matrix. The liquid-absorbing surface may have structures such as grooves and protrusions.

[0063] In this implementation, the heating element 40a substantially completely covers the extended length of the atomizing surface 310a. That is... Figure 5 The extension length along the length direction of the atomizing surface 310a is greater than 95% of the extension length of the atomizing surface 310a; in use, the heating element 40a can have a larger heat radiation area, improving atomization efficiency.

[0064] Figure 6 A schematic diagram of the atomizer 100b according to another embodiment is shown; the porous body 30b is constructed as a hollow column extending longitudinally along the atomizer 100b, and the heating element 40b is formed within the columnar hollow of the porous body 30b. In use, as shown by arrow R1, the liquid matrix in the reservoir 20b is absorbed along the radial direction of the outer surface of the porous body 30b, and then transferred to the heating element 40b on the inner surface for heating and vaporization to generate an aerosol; the generated aerosol is output longitudinally from within the columnar hollow of the porous body 30b.

[0065] In some preferred embodiments, the porous bodies 30 / 30a / 30b described above are rigid porous bodies, such as porous ceramic bodies, porous glass, porous metals, porous composite materials (such as porous metal-ceramic composite materials), etc.

[0066] In some embodiments, the pore size of the micropores within the porous bodies 30 / 30a / 30b is between 1 µm and 300 µm. In a more preferred embodiment, the average pore size of the micropores within the porous bodies 30 / 30a / 30b is between 35 µm and 70 µm.

[0067] Furthermore, in implementation, the volume of micropores with a pore size greater than 30µm in the porous body 30 / 30a / 30b accounts for more than 40% of the total volume of all micropores in the porous body 30 / 30a / 30b. In the porous body 30 / 30a / 30b with this micropore size arrangement, the aerosol particles generated by liquid matrix transfer and atomization have a larger particle size compared to the aerosol particles, making them easier to adhere to taste receptors in the oral cavity, which is beneficial for enhancing taste perception. More preferably, the volume of micropores with a pore size greater than 30µm accounts for more than 50% of the total volume of all micropores in the porous body 30 / 30a / 30b. More preferably, the volume of micropores with a pore size greater than 30µm accounts for more than 60% of the total volume of all micropores in the porous body 30 / 30a / 30b. More preferably, the volume of micropores with a pore size greater than 30µm accounts for more than 70% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0068] The porous body 30 / 30a / 30b with relatively large pore sizes has a higher liquid transfer efficiency than the porous body with small pore sizes. Therefore, in the above embodiment, the distance between the surface 320 / 320a and the atomizing surface 310 / 310a is larger than that of the porous body with small pore sizes. For example... Figure 4 and Figure 5 The distance d3 between the intermediate surface 320 / 320a and the atomizing surface 310 / 310a is between 1 and 5 mm. For example, in a specific embodiment, the distance d3 between the surface 320 / 320a and the atomizing surface 310 / 310a is greater than or equal to 3 mm.

[0069] Furthermore, in implementation, the volume of micropores with a pore diameter greater than 70µm within the porous body 30 / 30a / 30b accounts for more than 5% of the total volume of all micropores in the porous body 30 / 30a / 30b. More preferably, the volume of micropores with a pore diameter greater than 70µm within the porous body 30 / 30a / 30b accounts for more than 15% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0070] Furthermore, in practice, the volume of micropores with a pore diameter greater than 100µm in the porous body 30 / 30a / 30b accounts for 2% to 10% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0071] Furthermore, in implementation, the volume of micropores with pore sizes between 30µm and 65µm in the porous body 30 / 30a / 30b accounts for more than 50% of the total volume of all micropores in the porous body 30 / 30a / 30b. More preferably, the volume of micropores with pore sizes between 30µm and 65µm accounts for more than 60% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0072] Furthermore, in implementation, the volume of micropores with a pore size between 30µm and 100µm in the porous body 30 / 30a / 30b accounts for more than 60% of the total volume of all micropores in the porous body 30 / 30a / 30b; more preferably, the volume of micropores with a pore size between 30µm and 100µm accounts for more than 70% of the total volume of all micropores in the porous body 30 / 30a / 30b; even more preferably, the volume of micropores with a pore size between 30µm and 100µm accounts for more than 80% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0073] Furthermore, in implementation, the volume of micropores with a pore size less than 30µm in the porous body 30 / 30a / 30b accounts for less than 30% of the total volume of all micropores in the porous body 30 / 30a / 30b. More preferably, the volume of micropores with a pore size less than 30µm in the porous body 30 / 30a / 30b accounts for less than 20% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0074] Furthermore, in implementation, the volume of micropores with a pore size between 10 and 30 µm in the porous body 30 / 30a / 30b accounts for 5% to 20% of the total volume of micropores in the porous body 30 / 30a / 30b. With this 10–30 µm micropore size, the fragrance component particles are smaller in size compared to the aerosol particles generated by atomization and are transported through the liquid matrix, resulting in sufficient fragrance release in the liquid matrix, which is beneficial to the user's olfactory / respiratory experience.

[0075] Furthermore, in practice, the volume of micropores with a pore diameter of less than 10µm in the porous body 30 / 30a / 30b accounts for less than 5% of the total volume of all micropores in the porous body 30 / 30a / 30b.

[0076] The porous bodies 30 / 30a / 30b above have both micropores with a suitable ratio of larger pore size and micropores with a suitable ratio of smaller pore size. In use, on the one hand, the larger pore size of the micropores is conducive to the formation of large aerosol particles that can cover a wider area of ​​taste receptors in the mouth, and on the other hand, the smaller pore size of the micropores is conducive to the formation of smaller fragrance particles that can provide a more delicate taste sensation.

[0077] Furthermore, in this implementation, the porosity of the porous body 30 / 30a / 30b is between 35% and 75%. The term "porosity" is a materials science term referring to the percentage of pore volume to the total volume of a porous material in its natural state. In this implementation, the "porosity" of the porous body 30 / 30a / 30b is the percentage of the volume of all micropores in the porous body 30 / 30a / 30b to the total volume of the porous body 30 / 30a / 30b.

[0078] In some preferred embodiments, the water absorption rate of porous body 30 / 30a / 30b is 30% to 70%. The term "water absorption rate" is a materials science term referring to the percentage of the mass of water absorbed by an object or material under normal atmospheric pressure. In this embodiment, the "water absorption rate" of porous body 30 / 30a / 30b is the percentage of the mass of water absorbed by porous body 30 / 30a / 30b under normal atmospheric pressure to the total mass of porous body 30 / 30a / 30b.

[0079] In some preferred embodiments, the pore size of the micropores in the porous bodies 30 / 30a / 30b prepared above is formed by adjusting the particle size and proportion of the pore-forming agent (e.g., carbon powder, starch, PMMA microspheres). For example, in the preparation of porous bodies 30 / 30a / 30b made of common ceramic materials, a slurry is prepared by mixing ceramic raw materials (e.g., alumina, zirconium oxide, diatomaceous earth, etc.) with pore-forming agent powder and adding a certain amount of organic additives; then, it is injection molded in a mold to obtain a green body, and the green body is sintered to obtain the porous body 30 / 30a / 30b made of ceramic material. During the high-temperature sintering process, the pore-forming agent powder is burned off, and the space originally occupied forms the micropores within the porous bodies 30 / 30a / 30b.

[0080] In a more preferred embodiment, the particle shape of the pore-forming agent during preparation may include at least two or more shapes. For example, in a typical embodiment, the particle shape of the pore-forming agent may include two or more of the following: substantially spherical, ellipsoidal, elongated rod-shaped, funnel-shaped, coffee bean-shaped, polygonal, etc. Therefore, the pore type forming the micropores in the further prepared porous body 30 / 30a / 30b is two or more of the above-mentioned spherical, ellipsoidal, elongated rod-shaped, funnel-shaped, coffee bean-shaped, polygonal, etc.

[0081] In a more preferred embodiment, the proportion of substantially spherical micropores in the porous body 30 / 30a / 30b is not less than 30% of the total number of micropores. That is, during preparation, the proportion of substantially spherical particles in the pore-forming agent is not less than 30% of the total particles; this is advantageous for promoting uniform transfer of the liquid matrix. The substantially spherical pore-forming agent or micropores mentioned above are pore-forming agent particles or micropores with a sphericity greater than 0.8. The term "sphericity" is a parameter characterizing the morphology of an object such as the above-mentioned particles or pores, and can be calculated by the ratio of the surface area of ​​a sphere of the same volume to the surface area of ​​the particle or pore. The sphericity of a standard sphere is equal to 1, and the sphericity of other objects is less than 1; the closer the morphology of a particle or pore is to a sphere, the closer its sphericity is to 1.

[0082] In a specific embodiment 1, 70g of diatomaceous earth, 3g of alumina, 5g of clay, and 7g of high-temperature glass powder were used as ceramic powder, and a pore-forming agent with a volume of 45% of the ceramic powder was added and mixed to form a porous ceramic raw material. Then, paraffin wax was added and mixed, and the mixture was molded in a mold. After demolding, a porous body 30 was prepared using the usual debinding and sintering process.

[0083] In this Example 1, the pore-forming agent is a mixture of carbon powder and PMMA microspheres. The particle size distribution of the pore-forming agent is shown in Table 1 below:

[0084]

[0085] In the pore-forming agent, particles with a pore size <30.7µm account for 21% of the pore-forming agent, and the particle size of 70% of the particles in the pore-forming agent is basically between 30 and 100µm; in this embodiment, the average particle size is about 40 to 50µm.

[0086] The distribution of micropores inside the porous body 30 prepared in Example 1 was measured using the pump pressure method according to the national standard GB / T 21650.1-2008, as shown in Table 2 below:

[0087]

[0088]

[0089] Based on the mercury intrusion porosimetry test in Table 2 above, the pore size ratio of each section is calculated as shown in Table 3 below:

[0090]

[0091] Furthermore, Figure 7 The microstructure of a cross-section of the porous body 30 of Example 1, as shown in Tables 2 and 3 above, is illustrated. According to... Figure 7The porous body 30 of Example 1, as shown in Tables 2 and 3, has a pore size range of approximately 4–300 µm; the volume of micropores larger than 30 µm accounts for approximately 77% of the total micropore volume of the porous body 30; the volume of micropores with a pore size between 30 µm and 100 µm accounts for approximately 70% of the total micropore volume of the porous body 30; the volume of micropores larger than 100 µm accounts for approximately 7% of the total micropore volume of the porous body 30; and further, in this embodiment, the volume of micropores with a pore size smaller than 30 µm accounts for approximately 23% of the total micropore volume of the porous body 30. Furthermore, the water absorption rate of the porous body 30 prepared in Example 1, measured according to national standard GB / T 3299-1996, is 56%.

[0092] In another specific embodiment 2, 58g of diatomaceous earth, 5g of alumina, 5g of zirconium oxide, and 12g of glass powder were used as ceramic powder, and carbon powder, accounting for 50% of the volume of the ceramic powder, was added as a pore-forming agent to prepare porous body 30. The particle size distribution of the pore-forming agent carbon powder is shown in Table 4 below.

[0093]

[0094] Particles with a diameter <33.8µm account for 11% of the pore-forming agent, and 80% of the particles in the pore-forming agent are between 30 and 100µm in diameter; the average particle size of the pore-forming agent powder is about 33 to 40µm.

[0095] The distribution of micropores inside the porous body 30 prepared in Example 1 was measured according to the national standard GB / T 21650.1-2008, as shown in Table 5 below:

[0096]

[0097]

[0098]

[0099] Based on the mercury intrusion porosimetry test results in Table 5 above, the pore size ratio of each section is calculated as shown in Table 6 below:

[0100]

[0101] Furthermore, Figure 8 The microstructure of a cross-section of the porous body 30 of Example 2 shown in Tables 5 and 6 above is illustrated. The average pore size of the micropores in the porous body 30 of Example 2 is smaller than that of the porous body 30 of Example 1 above, and the average micropore size is between 36 and 50 µm.

[0102] In another specific embodiment 3, 55g of diatomaceous earth, 10g of alumina, 10g of clay, and 10g of glass powder were used as ceramic powder, and carbon powder, accounting for 60% of the volume of the ceramic powder, was added as a pore-forming agent to prepare porous body 30. The particle size distribution of the pore-forming agent carbon powder is shown in Table 7 below.

[0103]

[0104] Particles with a diameter >31.8µm account for 44% of the pore-forming agent, and the average particle size of the pore-forming agent is between 31.8 and 40.4µm.

[0105] The distribution of micropores inside the porous body 30 prepared in Example 3 was measured according to the national standard GB / T 21650.1-2008, as shown in Table 8 below:

[0106]

[0107]

[0108] Based on the mercury intrusion porosimetry test results in Table 8 above, the pore size ratio of each section is calculated as shown in Table 9 below:

[0109]

[0110] Furthermore, the average pore size of the porous body 30 in this embodiment 3 is smaller than that of the porous body 30 in this embodiment 2, and the average pore size of the porous body in this embodiment 3 is greater than 30µm, and the proportion of micropores with a pore size greater than 30µm to the total micropore volume is approximately 48.47%.

[0111] To verify the atomization particle size and mouthfeel of the aerosol generated by the porous body 30, which has a main micropore size greater than 30µm accounting for more than 40% of the volume, during the use of the liquid matrix, a comparative example was made using the large-pore porous body 30 prepared in Example 1 and a conventional small-pore porous ceramic body with an average pore size of 10-30µm and micropores larger than 30µm accounting for less than 40% of the total micropore volume. The particle size results of the aerosol generated by liquid matrix atomization at a constant power of 8W are shown in Table 10 below. Figures 9 to 11 As shown.

[0112]

[0113] according to Figure 10 and Figure 11The distribution results, in the comparative experiment with the classic tobacco-flavored liquid matrix 1, show that the mean value (expected value) of the normally distributed aerosol particle size in Comparative Example 1 is smaller than that of the porous body 30 in Example 1; and in the comparative experiment with the liquid matrix 2, the mean value (expected value) of the normally distributed aerosol particle size in Comparative Example 1 is smaller than that of the porous body 30 in Example 1. Furthermore, from the comparison of the expected particle size, the average particle size of the aerosol generated by the large-pore porous body 30 in Example 1 is larger than the average particle size of the aerosol generated by the small-pore porous body in Comparative Example 1. During inhalation, the aerosol particles generated by the porous body 30 in Example 1 are more likely to adhere to the taste bud receptors in the oral cavity, which is beneficial for enhancing the taste sensation.

[0114] And further from Figure 11 In the comparative test results of aerosol particles in the liquid matrix 2 shown, the aerosol particles of Comparative Example 1 have a higher particle volume percentage corresponding to the expected value of the normal distribution curve, approximately 16%, and the normal distribution curve is relatively high and narrow, indicating a more concentrated particle size. Specifically, 80% of the aerosol particles have a particle size between 0.4 and 1.1 μm. In contrast, the aerosol particles of the Comparative Example have a smaller particle volume percentage corresponding to the expected value of the normal distribution curve, approximately 12%, and the normal distribution curve is relatively low and wide, indicating a more dispersed particle size. Specifically, 80% of the aerosol particles have a particle size between 0.6 and 1.4 μm. Therefore, in use, the porous body 30 of Example 1 generates aerosol particles that have a wider coverage on oral taste bud receptors.

[0115] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An atomizer, characterized in that, include: A liquid storage chamber is used to store a liquid matrix; A porous body, in fluid communication with the liquid storage cavity to receive the liquid matrix; A heating element, attached to the porous body, heats at least a portion of the liquid matrix within the porous body to generate an aerosol; The pore size of the micropores in the porous body ranges from 1µm to 300µm, and the average pore size of the micropores in the porous body is between 35µm and 70µm. The volume of micropores with a pore size greater than 30µm in the porous body accounts for more than 60% of the total volume of micropores in the porous body, the volume of micropores with a pore size between 30µm and 65µm in the porous body accounts for more than 50% of the total volume of micropores in the porous body, and the volume of micropores with a pore size between 10µm and 30µm in the porous body accounts for 5 to 20% of the total volume of micropores in the porous body.

2. The atomizer as described in claim 1, characterized in that, The volume of micropores with a pore size greater than 70µm in the porous body accounts for more than 15% of the total volume of all micropores in the porous body.

3. The atomizer as described in claim 1 or 2, characterized in that, The volume of micropores with a pore size greater than 100µm in the porous body accounts for 2% to 10% of the total volume of all micropores in the porous body.

4. The atomizer as described in claim 1 or 2, characterized in that, The volume of micropores with a pore size of less than 30µm in the porous body accounts for less than 30% of the total volume of all micropores in the porous body.

5. The atomizer as described in claim 1 or 2, characterized in that, The volume of micropores with a pore size of less than 10µm in the porous body accounts for less than 5% of the total volume of all micropores in the porous body.

6. The atomizer as described in claim 1 or 2, characterized in that, The porosity of the porous body is 35% to 75%.

7. The atomizer as described in claim 1 or 2, characterized in that, The water absorption rate of the porous body is 30% to 70%.

8. The atomizer as described in claim 1 or 2, characterized in that, The porous body has approximately spherical micropores accounting for no less than 30% of all micropores.

9. The atomizer as described in claim 1 or 2, characterized in that, The porous body is rigid.

10. The atomizer as described in claim 1 or 2, characterized in that, The porous body is a porous ceramic body.

11. The atomizer as described in claim 1 or 2, characterized in that, The heating element is a conductive trace that is printed, deposited, or deposited on the porous body.

12. The atomizer as described in claim 1 or 2, characterized in that, The porous body has a flat, extended atomizing surface, and the heating element is a planar heating element attached to the atomizing surface; the extension dimension of the heating element along the length direction of the atomizing surface is greater than 75% of the length dimension of the atomizing surface.

13. The atomizer as described in claim 1 or 2, characterized in that, The porous body also includes a liquid channel that extends through the porous body along its length; At least a portion of the inner surface of the liquid channel is configured as a liquid-absorbing surface in fluid communication with the liquid reservoir for absorbing the liquid matrix.

14. The atomizer as described in claim 1 or 2, characterized in that, The porous body has a first surface and a second surface that are opposite to each other; wherein... The first surface is configured as a liquid-absorbing surface in fluid communication with the liquid storage chamber for absorbing liquid matrix; the second surface is configured as an atomizing surface, and the heating element is attached to the second surface; the distance between the first surface and the second surface is between 1 and 5 mm.

15. An electronic atomizing device, characterized in that, The atomizer includes an atomizer that atomizes a liquid matrix to generate an aerosol, and a power supply mechanism that supplies power to the atomizer; characterized in that the atomizer includes the atomizer according to any one of claims 1 to 14.

16. A porous body for use in an atomizer; characterized in that, The average pore size of the micropores in the porous body is between 35µm and 70µm, and the pore size range of the micropores in the porous body is between 1µm and 300µm. The volume of micropores with a pore size greater than 30µm in the porous body accounts for more than 60% of the total volume of micropores in the porous body, the volume of micropores with a pore size between 30µm and 65µm in the porous body accounts for more than 50% of the total volume of micropores in the porous body, and the volume of micropores with a pore size between 10µm and 30µm in the porous body accounts for 5 to 20% of the total volume of micropores in the porous body.

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