Electronic atomization device and atomizer and atomization assembly thereof

Abstract

The present application relates to an electronic atomization device, an atomizer thereof and an atomization assembly, the atomization assembly comprising a porous substrate having a first face and a second face opposite to the first face, and a plurality of liquid guiding holes extending from the first face to the second face. The cross-sectional dimension of the liquid guiding holes at both axial ends is smaller than that at the middle part, forming a pore structure with small holes at both ends and a large hole in the middle. This structure is beneficial to the liquid supply of the porous substrate to the heating body, and the large hole in the middle can increase the liquid storage capacity, and the small holes at the ends can effectively lock the liquid and prevent liquid leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of atomization, and more particularly, to an electronic atomization device, an atomizer thereof and an atomization assembly. BACKGROUND

[0002] Currently, the porous structure of the porous substrate used in the atomization assembly of the electronic atomization device mainly has two types. One type is a pore structure formed by the decomposition of a pore-forming agent in the substrate after high-temperature treatment. This type of pore structure has the disadvantages of poor uniformity and consistency of porosity and pore size distribution. The other type is a honeycomb pore structure formed by a molding process or mechanical pore-forming method. The honeycomb pore structure is mainly a straight-through hole with a single pore size distribution. In addition, the straight-through hole is prone to liquid leakage. Moreover, the pore structure has the problems of high processing difficulty and difficulty in realizing small pore size (less than 20 pm). SUMMARY

[0003] The technical problem to be solved by the present application is to provide an improved atomization assembly, an atomizer with the atomization assembly and an electronic atomization device to solve the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present application to solve the technical problem is to construct an atomization assembly, which comprises a porous substrate. The porous substrate has a first surface and a second surface arranged opposite to the first surface. A plurality of liquid guide holes extending from the first surface to the second surface are formed in the porous substrate. The cross-sectional size of the liquid guide hole at the two axial ends is smaller than that at the middle part.

[0005] In some embodiments, the axis direction of the liquid guide hole is perpendicular to the first surface.

[0006] In some embodiments, the cross-sectional size of the liquid guide hole gradually increases and then gradually decreases from the first surface to the second surface.

[0007] In some embodiments, the cross-sectional size of the liquid guide hole at the first surface is smaller than that at the second surface.

[0008] In some embodiments, the liquid guide hole comprises a first hole section, a second hole section and a third hole section sequentially connected from the first surface to the second surface.

[0009] The cross-sectional size of one end of the second hole section towards the first surface is greater than or equal to the maximum cross-sectional size of the first hole section, and the cross-sectional size of one end of the second hole section towards the second surface is greater than or equal to the maximum cross-sectional size of the third hole section.

[0010] In some embodiments, the first hole section, the second hole section and the third hole section are all straight-through holes.

[0011] In some embodiments, the cross-sectional dimension of the second hole section is larger than that of the third hole section, and the cross-sectional dimension of the third hole section is larger than that of the first hole section.

[0012] In some embodiments, the first hole section is a straight-through hole, or the cross-sectional dimension of the first hole section gradually increases from the first face to the second face.

[0013] In some embodiments, the second hole section is a straight-through hole, or the cross-sectional dimension of the second hole section gradually increases and then gradually decreases from the first face to the second face.

[0014] In some embodiments, the third hole section is a straight-through hole, or the cross-sectional dimension of the third hole section gradually decreases from the first face to the second face.

[0015] In some embodiments, the cross-sectional dimension of the first hole section is 10-30 μm, the cross-sectional dimension of the second hole section is 20-200 μm, and the cross-sectional dimension of the third hole section is 10-100 μm.

[0016] In some embodiments, the porous matrix is made of at least one of porous alumina ceramic, porous silica, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, and composite porous ceramic.

[0017] In some embodiments, the porous matrix is formed by mechanical punching or laser punching after tape casting, or the porous matrix is formed by 3D printing.

[0018] In some embodiments, the atomization assembly further comprises a heating track arranged on the first face of the porous matrix.

[0019] In some embodiments, the plurality of liquid guiding holes are distributed around the periphery of the heating track.

[0020] In some embodiments, the plurality of liquid guiding holes are evenly spaced around the periphery of the heating track.

[0021] In some embodiments, the heating track is a heating film, a heating wire, or a heating mesh.

[0022] In some embodiments, the atomization assembly further comprises two electrode portions respectively connected to two ends of the heating track.

[0023] The present application also provides an atomizer comprising a liquid storage cavity for storing liquid medium and an atomization assembly as described in any one of the above embodiments, the atomization assembly being in liquid guiding communication with the liquid storage cavity via the second face.

[0024] The application further provides an electronic atomization device comprising the atomizer and a power supply device electrically connected with the atomizer.

[0025] The application has at least the following beneficial effects: the cross-sectional size of the liquid guide hole at both axial ends is smaller than that of the middle part, thereby forming a pore structure with small holes at both ends and a large hole in the middle, which is beneficial to the liquid supply of the porous base to the heating body, and the large hole in the middle can increase the liquid storage capacity, and the small holes at the ends can effectively lock the liquid to prevent liquid leakage. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described below with reference to the drawings and examples, wherein:

[0027] Figure 1 is a schematic view of the cross-sectional structure of the atomization assembly shown in FIG. 1;

[0028] Figure 2 is Figure 1 the cross-sectional structure of the atomization assembly shown in FIG. 1;

[0029] Figure 3 is a schematic view of the cross-sectional structure of the atomization assembly in the second embodiment of the application;

[0030] Figure 4 is a schematic view of the cross-sectional structure of the atomization assembly in the third embodiment of the application;

[0031] Figure 5 is a schematic view of the cross-sectional structure of the atomization assembly in the fourth embodiment of the application;

[0032] Figure 6 is a schematic view of the cross-sectional structure of the atomization assembly in the fourth embodiment of the application; DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, objectives and effects of the application, the specific embodiments of the application will be described in detail with reference to the drawings.

[0034] Figures 1-2 shows an atomization assembly 1 in the first embodiment of the application, which can include a porous base 11 for sucking liquid medium from a liquid storage cavity of an atomizer and a heating body 12 arranged on the porous base 11 for heating and atomizing the liquid medium sucked into the porous base 11.

[0035] The porous base 11 has a first surface 111 and a second surface 112 opposite to the first surface 111. The first surface 111 is an atomizing surface for mounting the heating body 12, and the second surface 112 is a liquid absorbing surface for communicating with a liquid storage cavity. In the embodiment, the porous base 11 is in a cuboid shape, the first surface 111 and the second surface 112 are in a rectangle shape, and the first surface 111 is parallel to the second surface 112. In other embodiments, the cross-sectional shape of the porous base 11 can also be square, rhombic, trapezoidal, circular, elliptical, or other shapes.

[0036] The heating body 12 can be a heating film, which can be formed by silk printing, vacuum plating, or the like. Alternatively, the heating body 12 can be a heating wire or a heating mesh, which can be arranged on the porous base 11 by embedding or the like. The heating body 12 can include a heating track 121 and two electrode portions 122 respectively connected to two ends of the heating track 121. The electrode portions 122 can be pads for connecting with electrode leads. The two electrode portions 122 can be respectively located at two ends of the first surface 111 in the length direction. The heating track 121 is used for heating and atomizing the liquid medium after being electrified, and can be approximately in an S shape. It can be understood that the pattern shape of the heating track 121 is not limited to the S shape, and can also be other shapes.

[0037] A plurality of liquid guiding holes 110 extending from the first surface 111 to the second surface 112 are formed in the porous base 11. The liquid guiding hole 110 can be a columnar through hole with a circular cross section, and the axial direction of the liquid guiding hole 110 is perpendicular to the first surface 111. The hole diameter of the liquid guiding hole 110 at two ends in the axial direction is smaller than the hole diameter in the middle, thereby forming a structure with small ends and a large middle. This structure can ensure that the porous base 11 sufficiently supplies the liquid medium to the heating body 12, and the large middle hole diameter can increase the liquid storage capacity, which is beneficial to quickly supplying the liquid to the heating body 12, and the small end hole diameter can effectively lock the liquid to prevent liquid leakage. It can be understood that in other embodiments, the cross section of the liquid guiding hole 110 can also be elliptical, square, rectangular, rhombic, trapezoidal, or other shapes, and correspondingly, the cross-sectional size of the liquid guiding hole 110 at two ends in the axial direction is smaller than the cross-sectional size in the middle.

[0038] The plurality of liquid guiding holes 110 can be distributed around the heating track 121 and can be uniformly and spacedly distributed along the heating track 121. By uniformly arranging the plurality of liquid guiding holes 110 around the heating track 121, it can be ensured that the heating track 121 is within the uniform oil film range, and the parts far from the periphery of the heating track 121 are not distributed with the liquid guiding holes 110, thereby reducing the heat loss caused by the liquid medium gathered in the parts far from the heating track 121, and improving the thermal efficiency of the heating body 12.

[0039] In the embodiment, the liquid guide hole 110 is a stepped hole, which can include a first hole section 1101, a second hole section 1102, and a third hole section 1103 sequentially communicated from the first face 111 to the second face 112. The first hole section 1101, the second hole section 1102, and the third hole section 1103 are all straight-through holes, and the hole diameter of the second hole section 1102 is greater than the hole diameters of the first hole section 1101 and the third hole section 1103. The hole diameters of the first hole section 1101 and the third hole section 1103 can be equal or different.

[0040] In some embodiments, the hole diameter of the second hole section 1102 is greater than the hole diameter of the third hole section 1103, and the hole diameter of the third hole section 1103 is greater than the hole diameter of the first hole section 1101. Specifically, the liquid medium in the liquid storage cavity enters the porous matrix 11 through the third hole section 1103 and is stored in the second hole section 1102, and then is guided to the first face 111, i.e., the atomization face, for heating and atomization. The above hole diameter structure can ensure the stability of the liquid storage in the porous matrix 11, and thus the stability of the overall liquid supply and the smoothness of the atomization. The hole diameter of the first hole section 1101 can range from 10 to 30 μm, the hole diameter of the second hole section 1102 can range from 20 to 200 μm, and the hole diameter of the third hole section 1103 can range from 10 to 100 μm.

[0041] In some embodiments, the porous matrix 11 can be formed by flow casting and then mechanical punching or laser punching. Specifically, a single-layer green film strip can be formed by flow casting, and the thickness of the green film strip can be adjusted, for example, from 10 to 1000 μm. Then, the green film strip is punched by mechanical punching or laser punching, and different hole diameters can be pre-formed according to the gradient requirements of the liquid guide hole 110. Finally, the porous matrix 11 is formed by multi-layer lamination.

[0042] In other embodiments, the porous matrix 11 can also be formed by 3D printing. According to different porosity and hole diameter requirements of the porous matrix 11, the pore-forming process parameters can be artificially controlled to form a uniform distribution of target hole diameters and porosities. The mechanical punching, laser punching, or 3D printing green body pre-punching process can facilitate the artificial control of the porosity and hole diameter of the porous matrix 11, and can make the distribution of the liquid guide hole 110 more uniform, so as to obtain more stable and consistent atomization effect during the atomization of the electronic atomization device, and improve the taste consistency.

[0043] The porous matrix 11 can be made of at least one of porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite, and composite porous ceramic, or it can be made of other materials suitable for flow casting or 3D printing. It can be understood that the forming process of the porous matrix 11 is not limited to the above two methods, and it can also be formed by other forming processes.

[0044] Figure 3 The atomization assembly 1 in the second embodiment of the present application is shown, which mainly differs from the first embodiment in that, in the present embodiment, the hole diameter of the liquid guide hole 110 gradually increases first and then decreases from the first face 111 to the second face 112, so that the liquid guide hole 110 is substantially drum-shaped. The hole diameters of the liquid guide hole 110 at the first face 111 and the second face 112 can be equal or unequal. Preferably, the hole diameter of the liquid guide hole 110 at the first face 111 is smaller than that at the second face 112.

[0045] Figure 4 The atomization assembly 1 in the third embodiment of the present application is shown, which mainly differs from the first embodiment in that, in the present embodiment, the hole diameter of the first hole section 1101 of the liquid guide hole 110 gradually increases from the first face 111 to the second face 112; the second hole section 1102 is a straight-through hole, and the hole diameter thereof can be greater than or equal to the maximum hole diameter of the first hole section 1101; the hole diameter of the third hole section 1103 gradually decreases from the first face 111 to the second face 112, and the maximum hole diameter of the third hole section 1103 is less than or equal to the hole diameter of the second hole section 1102. The hole diameter of the liquid guide hole 110 at the first face 111 can be smaller than that at the second face 112.

[0046] Figure 5 The atomization assembly 1 in the fourth embodiment of the present application is shown, which mainly differs from the first embodiment in that, in the present embodiment, the first hole section 1101 and the third hole section 1103 of the liquid guide hole 110 are straight-through holes, and the hole diameter of the first hole section 1101 can be smaller than that of the third hole section 1103; the second hole section 1102 is substantially drum-shaped, and the hole diameter thereof gradually increases first and then decreases from the first face 111 to the second face 112, the hole diameter of one end of the second hole section 1102 towards the first face 111 is greater than or equal to the hole diameter of the first hole section 1101, and the hole diameter of one end of the second hole section 1102 towards the second face 112 is greater than or equal to the hole diameter of the third hole section 1103.

[0047] Figure 6 The electronic atomization device in some embodiments of the present application is shown, which can be substantially square columnar and include an atomizer 100 and a power supply device 200 electrically connected with the atomizer 100. The atomizer 100 can include a shell 2 and an atomization assembly 1 arranged in the shell 2, and a liquid storage cavity for storing liquid medium is formed in the shell 2. The power supply device 200 can include a bracket 4 and a battery, a circuit board, and an airflow sensor arranged in the bracket 4. The atomizer 100 and the power supply device 200 can be connected together in a detachable manner such as magnetic attraction or screwing. After the atomizer 100 and the power supply device 200 are assembled, the power supply device 200 supplies power to the heating body 12 in the atomizer 100, the heating body 12 heats and atomizes the liquid medium adsorbed in the porous base 11 after heating, and the user can inhale.

[0048] It can be understood that the above technical features can be used in any combination without limitation.

[0049] The above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but should not be understood as a limitation to the patent scope of the present application; it should be pointed out that the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. An atomizing assembly, characterized in that, The porous matrix (11) has a first face (111) and a second face (112) opposite to the first face (111), and a plurality of liquid guiding holes (110) extending from the first face (111) to the second face (112) are arranged on the porous matrix (11), the cross-sectional dimension of the axial two ends of the liquid guiding hole (110) is smaller than the cross-sectional dimension of the middle part. The liquid guiding hole (110) comprises a first hole section (1101), a second hole section (1102) and a third hole section (1103) which are sequentially communicated from the first face (111) to the second face (112). The axial direction of the liquid guiding hole (110) is perpendicular to the first face (111).

2. The atomization assembly of claim 1, wherein, The cross-sectional dimension of the liquid guiding hole (110) at the first face (111) is smaller than the cross-sectional dimension at the second face (112).

3. The atomization assembly of claim 1, wherein, The cross-sectional dimension of one end of the second hole section (1102) towards the first face (111) is greater than or equal to the maximum cross-sectional dimension of the first hole section (1101), and the cross-sectional dimension of one end of the second hole section (1102) towards the second face (112) is greater than or equal to the maximum cross-sectional dimension of the third hole section (1103).

4. The atomization assembly of claim 3, wherein, The first hole section (1101), the second hole section (1102) and the third hole section (1103) are all straight-through holes.

5. The atomization assembly of claim 4, wherein, The cross-sectional dimension of the second hole section (1102) is greater than the cross-sectional dimension of the third hole section (1103), and the cross-sectional dimension of the third hole section (1103) is greater than the cross-sectional dimension of the first hole section (1101).

6. The atomization assembly of claim 3, wherein, The first hole section (1101) is a straight-through hole, or the cross-sectional dimension of the first hole section (1101) gradually increases from the first face (111) to the second face (112).

7. The atomization assembly of claim 3, wherein, The second hole section (1102) is a straight-through hole, or the cross-sectional dimension of the second hole section (1102) gradually increases and then gradually decreases from the first face (111) to the second face (112).

8. The atomization assembly of claim 3, wherein, The third hole section (1103) is a straight-through hole, or the cross-sectional dimension of the third hole section (1103) gradually decreases from the first face (111) to the second face (112).

9. The atomization assembly of claim 3, wherein, The cross-sectional dimension of the first hole section (1101) is 10-30 μm, the cross-sectional dimension of the second hole section (1102) is 20-200 μm, and the cross-sectional dimension of the third hole section (1103) is 10-100 μm.

10. The atomization assembly of claim 1, wherein, The porous matrix (11) is made of at least one of porous alumina ceramic, porous silicon oxide, porous cordierite, porous silicon carbide, porous silicon nitride, porous mullite and composite porous ceramic.

11. The atomization assembly of claim 1, wherein, The porous matrix (11) is formed by tape casting and then mechanically punched or laser punched, or the porous matrix (11) is formed by 3D printing.

12. The atomizing assembly of any one of claims 1-11, wherein, The atomization assembly (1) further comprises a heating track (121) arranged on the first face (111) of the porous matrix (11).

13. The atomization assembly of claim 12, wherein, The plurality of liquid guiding holes (110) are distributed around the heat generating track (121).

14. The atomization assembly of claim 13, wherein, The plurality of liquid guiding holes (110) are evenly spaced around the heat generating track (121).

15. The atomization assembly of claim 12, wherein, The heat generating track (121) is a heat generating film, a heat generating wire or a heat generating net.

16. The atomization assembly of claim 12, wherein, The atomization assembly (1) further comprises two electrode portions (122) respectively connected to two ends of the heat generating track (121).

17. An atomiser characterised in that, An atomizer comprising a liquid storage cavity for storing liquid medium and the atomization assembly (1) as claimed in any one of claims 1-16, the atomization assembly (1) being in liquid communication with the liquid storage cavity via the second face (112).

18. An electronic atomizing device, characterized by, An atomizer comprising the atomization assembly as claimed in claim 17 and a power supply device electrically connected to the atomization assembly.

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