Electronic atomization device, atomization assembly for electronic atomization device and preparation method

Abstract

The invention provides an electronic atomization device, an atomization assembly for the electronic atomization device and a preparation method. The electronic atomization device comprises a liquid storage cavity; the porous body comprises a first side in fluid communication with the liquid storage cavity and a second side deviating from the first side; a plurality of liquid guide holes penetrating from the first side to the second side are formed in the porous body and are used for transferring the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; the ratio of the shortest distance between every two adjacent liquid guide holes to the diameter or width of each liquid guide hole is smaller than 1.0. According to the electronic atomization device, the porous body is provided with the liquid guide holes, the liquid guide rate is kept to be matched with the atomization rate so that the atomization efficiency can be improved, and meanwhile surface local dry burning caused by the fact that a liquid matrix cannot be repeatedly supplied in the atomization process due to the fact that the interval between the adjacent liquid guide holes is large can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic atomization technology, and in particular to an electronic atomization device, an atomization component for an electronic atomization device, and a preparation method thereof. Background Art

[0002] Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. People have attempted to replace these tobacco-burning articles by creating products that release compounds without combustion.

[0003] An example of such a product is a heating device that releases compounds by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products that may or may not contain nicotine. As another example, there are aerosol providing products, such as so-called electronic atomization devices. These electronic atomization devices typically contain a liquid and heat the liquid by a heating element to produce an inhalable aerosol; the heating element is arranged on a porous ceramic with straight through holes, and the porous ceramic is prepared by forming straight through holes in a predetermined direction on a dense ceramic by laser drilling or mechanical drilling, and the straight through holes are used to transfer the liquid to the heating element for heating and atomization. Summary of the invention

[0004] An embodiment of the present application provides an electronic atomization device, comprising:

[0005] A liquid storage chamber, used for storing a liquid matrix;

[0006] A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side;

[0007] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0008] The ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is less than 1.0.

[0009] For liquid-conducting holes that are approximately circular, the shortest distance between adjacent liquid-conducting holes can be understood as the distance between them along the virtual straight line direction passing through the centers of the two adjacent liquid-conducting holes. For non-circular liquid-conducting holes such as triangular, quadrilateral, pentagonal and other non-circular liquid-conducting holes, the shortest distance between two adjacent liquid-conducting holes can be understood as the spacing distance along the virtual straight line direction passing through the geometric centers of the two adjacent liquid-conducting holes.

[0010] For a liquid-conducting hole that is approximately circular, the diameter of the liquid-conducting hole can be characterized as the distance between the radial center and two points on the edge of the substantially circular liquid-conducting hole. However, since the shape of the liquid-conducting hole may be distorted or deformed during preparation, it may not be a very standard perfect circle, for example, it may be an ellipse or approximately a circle; therefore, for a non-standard circular liquid-conducting hole, the diameter of the liquid-conducting hole can be characterized as the maximum width of the liquid-conducting hole in the radial direction. For liquid-conducting holes of more shapes such as triangles, quadrilaterals, pentagons, etc., the diameter of the liquid-conducting hole can be characterized as the diameter of its circumscribed circle, that is, twice the distance from the geometric center of the liquid-conducting hole to one of its vertices.

[0011] In some embodiments, the ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is between 0.1 and 0.8.

[0012] In some embodiments, the shortest distance between adjacent liquid-conducting holes is between 5 μm and 35 μm.

[0013] In some embodiments, the diameter or width of the liquid-conducting hole is between 10 μm and 120 μm.

[0014] In some embodiments, at least a portion of the outer edge of the porous body is uneven;

[0015] And / or, at least a portion of the outer edge of the porous body is in a serrated shape.

[0016] In some embodiments, the outer edge of the porous body is provided with convex teeth arranged at intervals;

[0017] The air channel is at least partially defined by the gaps between adjacent protruding teeth to provide a path for air to enter the liquid storage chamber from the second side across the porous body.

[0018] In some embodiments, the porous body is formed at least in part by heat fusing a plurality of fiber filaments.

[0019] In some embodiments, the fiber filaments have a cross-sectional shape that is approximately a regular hexagon, a circle, or a square.

[0020] In some embodiments, the fiber filaments include at least one of glass fiber filaments or ceramic fiber filaments.

[0021] In some embodiments, the fiber filaments include solid fiber filaments and / or hollow fiber filaments.

[0022] In some embodiments, the fiber filament includes an inner core and an outer covering layer covering the inner core.

[0023] In some embodiments, the inner core has a glass transition temperature higher than the outer wrap layer.

[0024] In some embodiments, the liquid conducting holes of the porous body are formed by chemical etching.

[0025] The above-mentioned "chemical etching" is a commonly used term in the field of chemical processing, which refers to the process of using chemical reaction to corrode and remove a part of the etched object, so that a part of it is removed to form a void structure.

[0026] In some embodiments, the preparation of the porous body comprises:

[0027] Obtaining a dense precursor having an etchable inner core disposed therein and extending through the dense precursor;

[0028] The inner core of the dense precursor is chemically etched to remove the inner core of the dense precursor.

[0029] In some embodiments, the porous body comprises:

[0030] A porous liquid-conducting portion, used for delivering a liquid matrix; the liquid-conducting holes are arranged in the porous liquid-conducting portion;

[0031] A dense part surrounds the porous liquid-conducting part; the electronic atomization device provides support or retention for the porous body through the dense part.

[0032] In some embodiments, it also includes:

[0033] A support for accommodating or holding the porous body;

[0034] A flexible sealing element is located between the support and the dense portion to provide a seal therebetween.

[0035] In some embodiments, the porosity of the porous liquid-conducting portion is between 30% and 80%.

[0036] In some embodiments, the porous body comprises:

[0037] A porous liquid-conducting portion, used for delivering a liquid matrix; the liquid-conducting holes are arranged in the porous liquid-conducting portion;

[0038] a dense portion surrounding the porous liquid-conducting portion;

[0039] The porous liquid-conducting portion comprises a first fiber filament or is prepared from the first fiber filament, wherein the first fiber filament comprises an inner core and an outer wrapping layer wrapping the inner core;

[0040] The dense portion includes or is made of the second fiber filaments.

[0041] In some embodiments, it also includes:

[0042] A transition layer is arranged between the porous body and the heating element, and is used to prevent the heating element from falling off from the surface of the second side of the porous body due to thermal deformation.

[0043] In some embodiments, the transition layer includes at least one of silicon, titanium, zirconium, iron, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, vanadium, gallium, samarium, zinc, tin, magnesium, or oxides, nitrides, or carbides thereof.

[0044] Another embodiment of the present application further provides an electronic atomization device, comprising:

[0045] A liquid storage chamber, used for storing a liquid matrix;

[0046] A porous body having a first side and a second side that are opposed to each other; the porous body comprising:

[0047] a first porous layer, adjacent to or defining the first side, and in fluid communication with the liquid storage chamber for absorbing the liquid matrix; the pores in the first porous layer are randomly distributed;

[0048] a second porous layer, close to or defining the second side; a plurality of liquid conducting holes are arranged in the second porous portion and penetrate the second porous layer in a thickness direction; and a ratio of the shortest distance between adjacent liquid conducting holes to the diameter or width of the liquid conducting holes is less than 1.0;

[0049] The heating element is combined with the second porous layer and faces away from the first porous layer, and is used to heat the liquid substrate to generate aerosol.

[0050] Another embodiment of the present application further provides an electronic atomization device, comprising:

[0051] A liquid storage chamber, used for storing a liquid matrix;

[0052] A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side;

[0053] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0054] The porous body is at least partially prepared by chemically etching a dense precursor having an etchable inner core to etch away the inner core.

[0055] In some embodiments, the dense precursor is formed by hot-melting a plurality of fiber filaments having the inner core.

[0056] Another embodiment of the present application further provides an electronic atomization device, comprising:

[0057] A liquid storage chamber, used for storing a liquid matrix;

[0058] A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side;

[0059] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0060] At least a portion of the outer edge of the porous body is in a sawtooth shape.

[0061] Another embodiment of the present application further provides an atomization assembly for an electronic atomization device, comprising:

[0062] A porous body, comprising a second side opposite to the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side;

[0063] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0064] The ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is less than 1.0.

[0065] Another embodiment of the present application further provides an atomization assembly for an electronic atomization device, comprising:

[0066] A porous body, comprising a second side opposite to the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side;

[0067] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0068] The porous body is at least partially prepared by chemically etching a dense precursor having an etchable inner core to etch away the inner core.

[0069] Another embodiment of the present application further provides a method for preparing an atomization component for an electronic atomization device, comprising:

[0070] Obtaining a dense precursor including a first side and a second side opposite to each other, wherein an etchable inner core is arranged in the dense precursor and extends from the first side to the second side;

[0071] removing the inner core of the dense precursor by chemical etching to obtain a porous body having pores extending from the first side to the second side;

[0072] A heating element is formed on the second side of the porous body.

[0073] Another embodiment of the present application further provides a method for preparing an atomization component for an electronic atomization device, comprising:

[0074] Obtain a plurality of first fiber filaments, and fasten the plurality of first fiber filaments into at least one fiber filament bundle; the first fiber filaments include an etchable inner core and an outer wrapping layer wrapping the inner core;

[0075] heat-melting the at least one bundle of fiber filaments to fuse the outer covering layers of the adjacent first fiber filaments to obtain a dense precursor having the inner core;

[0076] chemically etching the dense precursor to remove the inner core and obtain a porous body;

[0077] A heating element is formed on the porous body.

[0078] The above electronic atomization device, the porous body has the above arrangement of liquid guide holes, while maintaining the liquid guide rate matching the atomization rate to improve the atomization efficiency, it can also reduce the local dry burning of the surface caused by the large spacing between adjacent liquid guide holes, which leads to the inability to repeatedly supply the liquid matrix during the atomization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0080] Figure 1 is a schematic diagram of an electronic atomization device provided by an embodiment;

[0081] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of an atomizer;

[0082] Figure 3 yes Figure 2 A cross-sectional schematic diagram of atomization components from one perspective;

[0083] Figure 4 yes Figure 3 A schematic diagram of the atomization component from another perspective;

[0084] Figure 5 is a schematic diagram of a first fiber filament used to prepare a porous body in one embodiment;

[0085] Figure 6 yes Figure 5 A schematic diagram of a cross section of a first fiber filament;

[0086] Figure 7 is a schematic diagram of a second fiber filament used to prepare a porous body in one embodiment;

[0087] Figure 8 yes Figure 7 A schematic diagram of a cross section of a second fiber filament;

[0088] Fig. 9 is a schematic diagram of polymerizing and arranging first fiber filaments and second fiber filaments by a jig in one embodiment;

[0089] Fig.10 Yes Fig. 9 A schematic diagram of a dense precursor formed by vacuum hot melt pressing or vacuum hot melt stretching of the first fiber filament and the second fiber filament so that their adjacent surfaces are fused or coupled;

[0090] Fig.11 Through the etching solution Fig.10 Schematic diagram of a porous precursor formed by etching the inner core of a dense precursor after fusion or coupling;

[0091] Fig.12 It is through Fig.11 Schematic diagram of a porous body prepared by edge cutting and grinding of a porous precursor;

[0092] Fig.13 is a scanning electron microscope image of a portion of the surface of a porous body prepared in an embodiment;

[0093] Fig.14 is a scanning electron microscope image of another part of the surface of the porous body prepared in one embodiment;

[0094] Fig.15 is a scanning electron microscope image of another part of the surface of the porous body prepared in one embodiment;

[0095] Fig.16 is a schematic diagram of a porous body prepared in another embodiment;

[0096] Fig.17 is a scanning electron microscope image of a portion of the surface of a porous body prepared in another embodiment;

[0097] Fig.18 is a scanning electron microscope image of another portion of the surface of a porous body prepared in another embodiment;

[0098] Fig.19 is a schematic cross-sectional view of a first fiber filament according to yet another embodiment;

[0099] Fig. 20 is a schematic cross-sectional view of a second fiber filament according to yet another embodiment;

[0100] Fig.21 In yet another embodiment, Fig.19 The first fiber and Fig. 20 Schematic diagram of preparing a porous body using second fiber filaments;

[0101] Fig. 22 is a schematic cross-sectional view of a first fiber filament according to yet another embodiment;

[0102] Fig.23 is a schematic cross-sectional view of a first fiber filament according to yet another embodiment;

[0103] Fig.24 is a schematic cross-sectional view of a third fiber filament for preparing a porous body according to another embodiment;

[0104] Fig.25 is a schematic diagram of polymerizing and arranging the third fiber filaments in one embodiment;

[0105] Fig.26 is a schematic diagram of filling the first precursor material in the gaps of the polymerized third fiber filaments in one embodiment;

[0106] Fig. 27 is a schematic diagram of a porous body prepared by fusing or coupling the third fiber filaments and the first precursor material through vacuum hot melting and pressing;

[0107] Fig.28 is a scanning electron microscope image of a portion of the surface of a porous body prepared by vacuum hot melting and pressing of a third fiber filament and a first precursor material in an embodiment;

[0108] Fig.29 is a schematic diagram of preparing a porous body by vacuum hot melt pressing of a third fiber filament and a second precursor material in another embodiment;

[0109] Fig.30 is a schematic diagram of preparing a porous body by vacuum hot melt pressing using only polymerized third fiber filaments in another embodiment;

[0110] Fig.31 is a scanning electron microscope image of a portion of the surface of a porous body prepared by vacuum hot melt pressing using only the third fiber filaments arranged in a polymeric manner in one embodiment;

[0111] Fig.32 is a schematic diagram of an atomization assembly of yet another embodiment;

[0112] Fig.33 yes Fig.32 A schematic diagram of the structure of the atomization component from another perspective;

[0113] Fig.34 is a schematic diagram of an atomization assembly of yet another embodiment;

[0114] Fig.35 is a schematic diagram of a heating element according to yet another embodiment;

[0115] Fig.36 is a schematic diagram of a heating element according to yet another embodiment. DETAILED DESCRIPTION

[0116] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific implementation methods.

[0117] One embodiment of the present application provides an electronic atomization device, which can be found in Figure 1 As shown, the invention comprises a nebulizer 100 storing a liquid matrix and atomizing the liquid matrix to generate an aerosol, and a power supply mechanism 200 for supplying power to the nebulizer 100. Figure 1 In the illustrated embodiment, the atomizer 100 and the power supply mechanism 200 of the electronic atomization device can be separated or disassembled relative to each other; the electronic atomization device having such atomizer 100 and the power supply mechanism 200 can be separated or disassembled relative to each other, such as the so-called "replaceable cartridge" electronic atomization device. Or in some other variant embodiments, the atomizer 100 and the power supply mechanism 200 of the electronic atomization device are tightly wrapped and fixed by the shell component of the electronic atomization device, so that the atomizer 100 and the power supply mechanism 200 cannot be detachable relative to each other from the inside of the shell component; the electronic atomization device having such atomizer 100 and the power supply mechanism 200 cannot be detachable relative to each other, such as the so-called "integrated or disposable" electronic atomization device.

[0118] In an alternative embodiment, for example Figure 1 As shown, the power supply mechanism 200 includes a receiving cavity 270 arranged at one end along the length direction for receiving and accommodating at least a portion of the atomizer 100, and an electrical contact 230 at least partially exposed on the surface of the receiving cavity 270, for supplying power to the atomizer 100 when at least a portion of the atomizer 100 is received and accommodated in the power supply mechanism 200.

[0119] according to Figure 1 In the exemplary embodiment shown, an electric contact 21 is provided on the end of the atomizer 100 opposite to the power supply mechanism 200 along the length direction, so that when at least a portion of the atomizer 100 is received in the receiving cavity 270, the electric contact 21 contacts and abuts against the electric contact 230 to form conductivity.

[0120] A sealing member 260 is disposed in the power supply mechanism 200, and the sealing member 260 separates at least a portion of the internal space of the power supply mechanism 200 to form the above receiving cavity 270. Figure 1 In the exemplary embodiment shown, the seal 260 is configured to extend along the cross-sectional direction of the power mechanism 200, and is preferably made of a flexible material, thereby preventing the liquid matrix that seeps from the atomizer 100 into the receiving chamber 270 from flowing to the controller 220, sensor 250 and other components inside the power mechanism 200.

[0121] exist Figure 1 In the exemplary embodiment shown, the power supply mechanism 200 also includes a battery cell 210 for supplying power at the other end away from the receiving cavity 270 along the length direction; and a controller 220 arranged between the battery cell 210 and the receiving cavity, which can be operated to guide current between the battery cell 210 and the electrical contact 230.

[0122] During use, the power supply mechanism 200 includes a sensor 250 for sensing the suction airflow generated when the atomizer 100 is inhaled, 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 .

[0123] exist Figure 1 In the exemplary 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 .

[0124] Figure 2 Shows Figure 1 The schematic diagram of the structure of an embodiment of the atomizer 100 includes:

[0125] Main housing 10; Figure 2 As shown, the main housing 10 is generally in the shape of a vertically long cylinder, and its interior is hollow for arranging necessary functional components for storing and atomizing liquid matrix; the main housing 10 has a proximal end 110 and a distal end 120 opposite to each other along the length direction. The proximal end 110 is configured as an end for users to inhale aerosol, and an air outlet 111 for users to inhale is provided at the proximal end 110; and the distal end 120 is used as an end combined with the power supply mechanism 200.

[0126] See also Figure 2 As shown, the main housing 10 is provided with a liquid storage chamber 12 for storing liquid matrix, and an atomizing assembly for sucking liquid matrix from the liquid storage chamber 12 and heating and atomizing the liquid matrix. Figure 2In the schematic diagram shown, an aerosol transmission tube 11 is axially arranged in the main shell 10, and the space between the aerosol transmission tube 11 and the inner wall of the main shell 10 forms a liquid storage chamber 12 for storing a liquid matrix; the aerosol transmission tube 11 extends to or ends at the air outlet 111, so as to transmit the generated aerosol to the air outlet 111 for inhalation.

[0127] In some optional embodiments, the aerosol transmission tube 11 and the main shell 10 are integrally molded using a moldable material, thereby defining a liquid storage chamber 12 between the aerosol transmission tube 11 and the main shell 10, and the liquid storage chamber 12 has an opening open toward the distal end 120.

[0128] See also Figures 2 to 4 As shown, the nebulizer 100 also includes an atomizing assembly for sucking and atomizing the liquid matrix from the liquid storage chamber 12 to generate an aerosol; specifically, the atomizing assembly includes:

[0129] The rigid porous body 30 is generally configured in a plate-like or sheet-like shape; and the porous body 30 has a first side 310 and a second side 320 that are separated from each other; the first side 310 is arranged toward the liquid storage chamber 12 and is in fluid communication with the liquid storage chamber 12;

[0130] The heating element 40, coupled to the second side 320, is used to heat at least a portion of the liquid matrix transferred by the porous body 30 to generate an aerosol.

[0131] See also Figure 2 In the illustrated embodiment, the atomizer 100 further comprises:

[0132] A rigid support 20, for example, made of organic polymer plastic or ceramics; the support 20 is used to accommodate and support the atomization assembly, in particular, to accommodate the porous body 30;

[0133] The flexible sealing element 50 is made of, for example, a flexible material including silicone or a thermoplastic elastomer; the sealing element 50 is at least partially located in the bracket 20 and partially surrounds or encloses the porous body 30; the sealing element 50 is used to provide a seal between the bracket 20 and the porous body 30.

[0134] See also Figures 2 to 4 As shown, the porous body 30 is configured to be arranged along the longitudinal extension of the atomizer 100; and the porous body 30 is generally configured to be in a sheet shape. And the porous body 30 has a first side 310 and a second side 320 opposite to each other in the thickness direction. The first side 310 is arranged toward the liquid storage chamber 12 and is in fluid communication with the liquid storage chamber 12, for example, Figure 2The first side 310 indicated by the middle arrow R1 is in fluid communication with the liquid storage chamber 12 through the liquid channel 13 defined in the bracket 20 to receive the liquid matrix; the surface of the second side 320 is configured as an atomization surface, and the heating element 40 is combined on the second side 320 .

[0135] according to Figure 2 As shown, the porous body 30 is basically arranged perpendicular to the longitudinal direction of the main shell 10; and an atomization chamber 340 is defined between the second side 320 of the porous body 30 and the distal end 120 of the main shell 10, and the atomization chamber 340 is located on the side of the porous body 30 away from the liquid storage chamber 12; the atomization chamber 340 is used to contain the released aerosol. At least a portion of the heating element 40 is exposed in the atomization chamber 340. When inhaling, external air enters the atomization chamber 340 from the air inlet 22 of the distal end 120, and carries the aerosol in the atomization chamber 340 to the aerosol transmission tube 11, and then is inhaled by the user at the air outlet 111, as shown in FIG. Figure 2 As shown by the arrow R2.

[0136] In some embodiments, the porous body 30 is a straight sheet or plate; and the first side 310 and the second side 320 are flat extended planes. Or in some other variations, the porous body 30 is a curved sheet; and the first side 310 and the second side 320 are curved surfaces.

[0137] exist Figures 2 to 4 In the embodiment, the porous body 30 is in a square shape; or in some other variations, the porous body 30 may be substantially circular, elliptical, polygonal, or other shapes with side notches, etc. The porous body 30 may include at least one of glass, ceramic, carbon, metal, and high temperature resistant polymer plastic.

[0138] exist Figures 2 to 4 In the illustrated embodiment, the heating element 40 is a sheet-shaped heating element mounted on the second side 320 after being cut or etched from a sheet-shaped substrate. Alternatively, in other variant embodiments, the heating element 40 includes a conductive track formed on the second side 320 by printing, deposition, etc.; specifically, the heating element 40 includes a printed conductive track that extends in a circuitous or meandering manner.

[0139] In some embodiments, the heating element 40 is made of a resistive metal material, a metal alloy material, graphite, a conductive ceramic, etc. having appropriate impedance; suitable metal or alloy materials may, for example, include at least one of nickel, cobalt, zirconium, titanium, aluminum, chromium, tungsten, iron, niobium, tantalum, molybdenum, silver, gold, platinum, palladium, nickel alloy, cobalt alloy, zirconium alloy, titanium alloy, nickel-chromium alloy, nickel-iron alloy, iron-chromium alloy, iron-manganese-aluminum-based alloy or stainless steel.

[0140] according to Figures 2 to 4In the embodiment shown, the heating element 40 is arranged as a substantially planar heating element; and the heating element 40 includes a first electrode portion 41 and a second electrode portion 42 opposite to each other in the length direction, and a heating portion 43 extending between the first electrode portion 41 and the second electrode portion 42. The heating portion 43 is used to heat the liquid matrix to generate an aerosol; the first electrode portion 41 and the second electrode portion 42 are used to conduct current on the heating portion 43. After assembly, the electrical contact 21 passes through the distal end 120 into the atomizer 100 and abuts against the first electrode portion 41 and the second electrode portion 42, so as to be used to power the heating element 40.

[0141] according to Figures 2 to 4 As shown, the heating portion 43 of the heating element 40 is fluid permeable; as used herein, "fluid permeable" means that an aerosol in a gas phase can easily pass through the heating portion 43. For example, in Figure 3 As shown in the figure, the heating portion 43 is a tortuous shape so as to define hollows or holes, so that the fluid can penetrate. Or in some other embodiments, the heating portion 43 can be a mesh shape with mesh holes, so as to form a fluid-permeable. Or in some other embodiments, the heating portion 43 can be a printed, for example, S-shaped, Ω-shaped resistance heating track, and preferably the width of the track is not more than 2 mm.

[0142] exist Figures 2 to 4 In the embodiment, the heating element 40 and / or the heating portion 43 partially covers the end of the liquid guide hole 321 on the second side 320, and partially exposes or avoids the end of the liquid guide hole 321 on the second side 320. Figures 2 to 4 In the embodiment, the first electrode portion 41 and the second electrode portion 42 are dense.

[0143] In some optional embodiments, the heating element 40 is formed on the second side 320 of the porous body 30 by printing, depositing, spraying or printing a conductive paste, and is thus closely bonded to the porous body 30. Alternatively, in some other embodiments, the independently prefabricated heating element 40 is bonded to the second side 320 of the porous body 30 by adding a bonding paste such as glass paste or metal paste and then curing, so that the heating element 40 is stably bonded to the second side 320 of the porous body 30.

[0144] according to Figures 2 to 4 As shown, the porous body 30 comprises:

[0145] A plurality of liquid guiding holes 321 penetrate from the first side 310 to the second side 320 , and the liquid matrix is ​​transferred from the first side 310 to the heating element 40 located on the second side 320 through the liquid guiding holes 321 for heating and atomization.

[0146] In some embodiments, the plurality of liquid conducting holes 321 in the porous body 30 extend straight along the thickness direction of the porous body 30; or, the liquid conducting holes 321 penetrate the porous body 30 along the thickness direction of the porous body 30. And in an embodiment, the plurality of liquid conducting holes 321 are arranged in an orderly manner in the porous body 30. The extension of the plurality of liquid conducting holes 321 has a predetermined direction, not disorderly. And in an embodiment, the plurality of liquid conducting holes 321 are arranged in an array in the porous body 30; and in an embodiment, the plurality of liquid conducting holes 321 can transfer the liquid matrix from the first side 310 to the second side 320 at a predetermined rate. In some embodiments, the arrangement of the plurality of liquid conducting holes 321 in the porous body 30 makes the porous body 30 in the form of a honeycomb structure.

[0147] according to Figures 2 to 4 As shown, the porous body 30 includes:

[0148] A porous liquid-conducting part 32 is located in the center, and a dense part 31 surrounds or avoids the porous liquid-conducting part 32; wherein the porous liquid-conducting part 32 is basically arranged as a liquid-conducting and atomization area, and the liquid-conducting holes 321 are located in the porous liquid-conducting part 32; the dense part 31 is mainly configured as an installation fit or a sealing fit area.

[0149] For example, Figure 2 As shown, the sealing element 50 provides sealing by surrounding or bonding to the dense portion 31; or, the bracket 20 provides retention or support for the porous body 30 by bonding or abutting against the dense portion 31. Figures 2 to 4 In the embodiment of the present invention, the liquid conducting hole 321 is located in the porous liquid conducting part 32 and avoids the dense part 31. Figures 2 to 4 In the embodiment, the first electrode portion 41 and the second electrode portion 42 of the heating element 40 are also combined with the dense portion 31.

[0150] In some embodiments, the length dimension of the porous liquid-conducting portion 32 is substantially equal to the length dimension of the heating portion 43 of the heating element 40. In some embodiments, the length dimension of the porous liquid-conducting portion 32 is substantially between 1 / 3 and 4 / 5 of the length of the porous body 30; Figure 4 In the specific embodiment shown, the length dimension of the porous liquid-conducting portion 32 is substantially between 2 / 3 and 3 / 4 of the length dimension of the porous matrix 31 .

[0151] In some common embodiments, the porous body 30 having the liquid-conducting holes 321 is prepared by laser drilling or mechanical drilling on a dense substrate such as ceramic or glass.

[0152] In one embodiment of the present application, the porous body 30 having the liquid-conducting holes 321 is prepared by fiber filaments. Specifically, the porous body 30 is prepared by vacuum hot-melt pressing or vacuum hot-melt stretching of the fiber filaments followed by etching.

[0153] One embodiment of the present application further provides a method for preparing a porous body 30 by using fiber filaments, comprising:

[0154] S10, obtain Figure 5 and Figure 6 The first fiber filament 3100 shown; the first fiber filament 3100 is a fiber filament having an inner core 3120 and an outer sheath 3110; wherein the inner core 3120 can be etched or dissolved, and the outer sheath 3110 is etch-resistant; Figure 5 and Figure 6 In the illustrated embodiment, the first fiber filament 3100 has a cross-sectional shape that is approximately a regular hexagon; the inner core 3120 is substantially circular;

[0155] S20, get Figure 7 and Figure 8 The second fiber filament 3200 shown has no inner core; the cross-sectional shape of the second fiber filament 320 is the same as that of the first fiber filament 3100, which is a regular hexagon; and in some embodiments, the second fiber filament 3200 is etch-resistant, for example, the material of the second fiber filament 3200 is the same as that of the outer wrapping layer 3110 of the first fiber filament 3100;

[0156] S30, according to Fig. 9 As shown, a plurality of first fiber filaments 3100 and a plurality of second fiber filaments 3200 are arranged in a clustered manner and clamped by a fixture 4000 to form a fiber filament bundle or a bundle; Fig. 9 In the arrangement, the second fiber filaments 3200 are arranged on the outside, and the first fiber filaments 3100 are arranged on the inside; and adjacent fiber filaments abut against each other to form an adjacent surface 3300;

[0157] S40, will follow Fig. 9 A bundle or a bunch of first fiber filaments 3100 and a bundle of second fiber filaments 3200 are arranged and subjected to vacuum heat-melting stretching or vacuum heat-melting pressing, so that the adjacent surfaces 3300 between them are partially melted at a temperature above their glass transition temperature and then fused or coupled to form Fig.10 The dense precursor shown; Fig.10 As shown in , the adjacent surfaces 3300 between the fiber filaments are substantially eliminated by fusion or coupling;

[0158] S50, according to the required thickness of the porous body 30 Fig.10The dense precursor shown in FIG. 1 is cut, and the cut dense precursors are used in an etching solution for etching to dissolve or corrode the inner core 3120 in the dense precursor, thereby obtaining a Fig.11 The porous precursor 300 shown; the porous precursor 300 formed by etching with an etching solution has a through hole 321 produced by removing the inner core 3120 by etching;

[0159] S60, yes Fig.11 The edges of the porous precursor 300 are cut and polished to make the edges smooth and flat, thereby obtaining Fig.12 The porous body 30 shown in FIG.

[0160] Wherein, the first fiber filament 3100 and the second fiber filament 3200 are both solid fiber filaments.

[0161] from Figures 5 to 12 In the fiber filament arrangement and preparation process shown, the dense part 31 of the prepared porous body 30 is basically defined by the second fiber filament 3200 after vacuum hot melt pressing or vacuum hot melt stretching, and then fusion or coupling; and the porous liquid-conducting part 32 of the porous body 30 is basically defined by the first fiber filament 3100 after vacuum hot melt pressing, and then fusion or coupling, and the liquid-conducting holes 321 in the porous liquid-conducting part 32 are formed after the inner core 3120 of the first fiber filament 3100 is etched away.

[0162] For example Figures 13 to 15 An embodiment using Figures 5 to 12 The microscopic morphology of the surface of different parts of the porous body 30 prepared by the first fiber filament 3100 and the second fiber filament 3200 with a hexagonal cross section is shown. Fig.13 It is a scanning electron microscope image of a local surface of the porous liquid-conducting portion 32 of the porous body 30; Fig.14 It is a scanning electron microscope image of a local surface including a porous liquid-conducting portion 32 and a dense portion 31; Fig.15 It is mainly a local electron microscope scanning image of the surface of the dense part 31 near the edge. Fig.15 It can be seen that some areas of the dense portion 31 still have residual traces of adjacent surfaces 3300 that are not completely fused or coupled between adjacent second fiber filaments 3200. These residual traces can be eliminated by fusing or coupling them again through vacuum hot melting and pressing.

[0163] according to Figures 5 to 13 As shown, in the porous body 30 prepared by using the first fiber filament 3100 and the second fiber filament 3200 with a regular hexagonal cross section, the liquid conducting holes 321 in the porous liquid conducting part 32 are not arranged in a standard matrix. Along the width direction of the surface of the second side 320, adjacent liquid conducting holes 321 are partially staggered.

[0164] In some embodiments, the first fiber filament 3100 and the second fiber filament 3200 are or include glass fiber filaments or ceramic fiber filaments.

[0165] In some embodiments, the vacuum hot melt pressing or vacuum hot melt stretching in step S40 can be performed using conventional hot melt pressing or hot drawing equipment such as a glass fiber hot press, a composite material hot press molding machine, or a vacuum furnace with wire drawing.

[0166] In some embodiments, the etching solution for glass or ceramics in step S50 may generally include an acidic etching solution of at least one of nitric acid, hydrochloric acid, and hydrofluoric acid, or an alkaline etching solution of sodium hydroxide, etc.

[0167] Accordingly, the outer sheath 3110 of the first fiber filament 3100 and / or the second fiber filament 3200 may be resistant to acid etching liquid; the inner core 3120 of the first fiber filament 3100 may be etched or corroded by the acid etching liquid. Alternatively, the outer sheath 3110 of the first fiber filament 3100 and / or the second fiber filament 3200 may be made of acid-insoluble glass or ceramic material; the inner core 3120 of the first fiber filament 3100 is made of acid-soluble glass or ceramic material.

[0168] In some embodiments, the material of the outer covering layer 3110 of the first fiber filament 3100 and / or the second fiber filament 3200 includes at least one of high-purity quartz glass, which is generally acid-resistant, ordinary silicate glass, borosilicate glass, and the like.

[0169] In some embodiments, the material of the inner core 3120 of the first fiber filament 3100 includes acid-soluble boroaluminate glass. For example, in some specific embodiments, the material of the inner core 3120 of the first fiber filament 3100 includes: 50-60wt% B2O3, 5-10wt% Al2O3, 30-40wt% Na2O; for example, in some specific embodiments, the material of the inner core 3120 of the first fiber filament 3100 includes: 40-50wt% SiO2, 20-30wt% PbO, 20-40wt% Na2O; for example, in some specific embodiments, the material of the inner core 3120 of the first fiber filament 3100 includes: 30-40wt% SiO2, 30-40wt% B2O3, 20-40wt% K2O; these glass materials are relatively easy to be corroded and removed in acidic etching solutions of nitric acid and hydrofluoric acid.

[0170] In some embodiments, the first glass transition temperature (Tg1) of the glass material of the inner core 3120 of the first glass fiber filament 3100 is greater than the second glass transition temperature (Tg2) of the glass material of the outer covering layer 3110 of the first glass fiber filament 3100 and / or the glass material of the second fiber filament 3200. In the vacuum hot melt pressing or vacuum hot melt stretching process of step S40, when the first glass fiber filament 3100 and the second fiber filament 3200 that are aggregated into a bundle or a bundle are heated to the second glass transition temperature (Tg2) and lower than the first glass transition temperature (Tg1) to fuse or couple them, the inner core 3120 of the first glass fiber filament 3100 is not softened, which is convenient for preparation.

[0171] In some embodiments, the first glass transition temperature (Tg1) of the glass material of the inner core 3120 of the first glass fiber filament 3100 is between 800 and 1200° C. And in some embodiments, the second glass transition temperature (Tg2) of the glass material of the outer wrapping layer 3110 of the first glass fiber filament 3100 and / or the glass material of the second fiber filament 3200 is between 500 and 800° C. In step S40, the temperature condition of the vacuum hot melt pressing or vacuum hot melt stretching process is controlled to be 550 to 750° C.

[0172] In some embodiments, the porous body 30 is prepared by fusing or coupling, cutting, and etching the first fiber filament 3100 and the second fiber filament 3200 .

[0173] Alternatively, in some other embodiments, the porous body 30 is prepared only by fusing or coupling, cutting, or etching a plurality of first fiber filaments 3100; then the prepared porous body 30 does not have a dense portion 31 formed by the first fiber filaments 3200, but only has a porous liquid-conducting portion 32 formed by the first fiber filaments 3100.

[0174] In some embodiments, the porous liquid-conducting portion 32 of the prepared porous body 30 has a porosity of 30-80%. In some embodiments, the dense portion 31 of the prepared porous body 30 has a porosity of less than 1%, for example, the dense portion 31 has a porosity of 0-1%.

[0175] In some embodiments, the diameter of the liquid-conducting hole 321 in the prepared porous body 30 is between 10 and 120 μm. The diameter of the above liquid-conducting hole 321 can represent the distance between the radial center and two points on the edge of the substantially circular liquid-conducting hole 321. However, due to the preparation by hot melting and etching, the shape of the prepared liquid-conducting hole 321 may be distorted or deformed, so that they are not very standard perfect circular shapes, for example, they may be elliptical or approximately circular; therefore, for non-standard perfect circular liquid-conducting holes 321, the diameter of the liquid-conducting hole 321 can be characterized as the maximum width of the liquid-conducting hole 321 in the radial direction. Or more preferably, the diameter of the liquid-conducting hole 321 is between 40 and 100 μm.

[0176] Or in some other variations of the embodiments, the liquid conducting hole 321 may be in more shapes such as a triangle, a quadrilateral, a pentagon, etc.; then the diameter of such a non-circular liquid conducting hole 321 may be represented as twice the distance from the geometric center of the liquid conducting hole 321 to one of its vertices.

[0177] exist Fig.12 In the illustrated embodiment, the ratio of the shortest distance d1 between adjacent liquid guide holes 321 in the prepared porous body 30 to the diameter of the liquid guide hole 321 is less than 1.0. In some specific embodiments, the ratio of the shortest distance d1 between adjacent liquid guide holes 321 in the prepared porous body 30 to the diameter of the liquid guide hole 321 is between 0.1 and 0.8. The arrangement of the liquid guide holes 321 with the above ratio is useful for matching the liquid guide rate with the atomization rate to improve the atomization efficiency, while preventing the adjacent liquid guide holes from being too far apart, resulting in the inability to repeatedly supply the liquid matrix during the atomization process, causing local dry burning on the surface.

[0178] According to Fig.12 As shown in , the shortest distance d1 between adjacent liquid guiding holes 321 can be understood as the distance between them along the direction of the virtual straight line L passing through the centers of the two adjacent liquid guiding holes 321. For non-circular liquid guiding holes 321 such as triangles, quadrilaterals, pentagons, etc., the shortest distance d1 between two adjacent liquid guiding holes 321 can be understood as the spacing distance along the direction of the virtual straight line passing through the geometric centers of the two adjacent liquid guiding holes 321.

[0179] In some embodiments, the shortest distance d1 between adjacent liquid-conducting holes 321 in the porous body 30 is between 5 μm and 35 μm.

[0180] In some embodiments, the thickness of the porous body 30 is not less than 0.1 mm.

[0181] In some embodiments, the first fiber filament 3100 and the second fiber filament 3200 are regular hexagonal cross-sectional shapes; and the side length of the cross-sectional shape of the first fiber filament 3100 and / or the second fiber filament 3200 is between 0.8 and 1.6 mm. And the inner core 3120 of the first fiber filament 3100 is circular in shape; and the inner core 3120 has a diameter of about 10 to 120 μm. Or more preferably, the diameter of the inner core 3120 is between 40 and 100 μm.

[0182] or Fig.16 FIG. 3 is a schematic diagram showing a porous body 30a prepared by aggregating a first fiber filament 3100 and a second fiber filament 3200 into a bundle or a bundle, and then fusing or coupling, cutting, and etching in another embodiment; Fig.16 In the figure, the dense part 31a of the porous body 30a is defined by the second fiber filaments 3200, and the porous liquid-conducting part 32a having the liquid-conducting holes 321a is defined by the first fiber filaments 3100. Fig.16 In the embodiment shown, the outer edge of the porous body 30a made of fiber filaments with a hexagonal cross section is not cut and polished, so the outer edge of the porous body 30a is uneven and jagged; for example Fig.17 and Fig.18 The electron microscope scanning image shows a partial surface of the porous body 30a whose outer edge has not been cut and polished smoothly.

[0183] according to Figures 16 to 18 As shown, the outer edge of the porous body 30a has a plurality of convex teeth 311a arranged at intervals. The gaps between adjacent convex teeth 311a define an air channel, so that when the consumption of the liquid matrix causes the negative pressure in the liquid storage chamber 12 to exceed a predetermined threshold, the air in the atomization chamber 340 passes through the gaps between the adjacent convex teeth 311a and enters the liquid storage chamber 12 to relieve or eliminate the negative pressure in the liquid storage chamber 12. Alternatively, the gaps between the adjacent convex teeth 311a define an air channel to provide a channel path for air to pass through from the second side of the porous body 30a to the first side.

[0184] In some other variations, the first fiber filament 3100 and / or the second fiber filament 3200 may have a cross-sectional shape of square, triangle, polygon, circle, or oval, etc. And in some other variations, the inner core 3120 of the first fiber filament 3100 may have a shape of approximately square, triangle, polygon, oval, etc.

[0185] For example Fig.19A schematic diagram of a first fiber filament 3100a of another embodiment is shown; the first fiber filament 3100a of this embodiment has a square cross-sectional shape; the first fiber filament 3100a includes an etching-resistant outer sheath 3110a and an etchable inner core 3120a. Accordingly, Fig. 20 A schematic diagram of a second fiber filament 3200a according to yet another embodiment is shown. The second fiber filament 3200a has a square cross-sectional shape; the second fiber filament 3200a is etch-resistant.

[0186] Accordingly Fig.21 A schematic diagram of preparing a porous body by polymerizing and arranging the first fiber filament 3100a and the second fiber filament 3200a is shown; Fig.21 It can be known that after being aggregated and arranged, a bundle or a bundle of fiber filaments are closely pressed against and in contact with each other, with basically no gap between them; and the edges of the fiber filament bundle formed after being aggregated and fastened are basically joined flatly; accordingly, a porous body with a flat outer edge can be prepared. Fig.21 In the porous body prepared by the first fiber filament 3100a and the second fiber filament 3200a with a square cross section, the liquid-conducting pores are arranged in a matrix or array.

[0187] or Fig. 22 A schematic diagram of a first fiber filament 3100b according to yet another variation embodiment is shown; in this embodiment, the cross-sectional shape of the first fiber filament 3100b is a square shape, and the inner core 3120b is a square shape.

[0188] or Fig.23 A schematic diagram of a first fiber filament 3100c of another variant embodiment is shown; in this embodiment, the first fiber filament 3100c includes a plurality of inner cores 3120c located in an outer wrapping layer 3110c; similarly, after preparation, the plurality of inner cores 3120c define the liquid-conducting holes in the porous body. In some further specific embodiments, the shortest spacing d1 between adjacent liquid-conducting holes of the porous body prepared using the first fiber filament 3100c is no greater than 30 μm; and in some further specific embodiments, the ratio of the shortest spacing d1 between adjacent liquid-conducting holes of the porous body prepared using the first fiber filament 3100c to the diameter of the liquid-conducting holes is 0.1 to 1.

[0189] Figure 24 to Figure 27 A schematic diagram of preparing a porous body 30d by using a third fiber filament 3100d in another embodiment is shown; in this embodiment, the preparation of the porous body 30d includes:

[0190] S10a, obtaining a third fiber filament 3100d; the third fiber filament 3100d has Fig.24The cross-sectional shape is shown as a circle, and the third fiber filament 3100d is a tubular hollow fiber filament having an inner hollow 3111d;

[0191] S20a, such as Fig.25 As shown, the third fiber filaments 3100d are aggregated and arranged into a bundle or a bundle, and gaps 3400d are defined between the aggregated and arranged third fiber filaments 3100d;

[0192] S30a, such as Fig.26 As shown, a bundle or a bundle of third fiber filaments 3100d arranged in a polymerized manner is fastened to a jig 4000d, and a first precursor material 3500d is injected or filled into the gap 3400d; then the first precursor material 3500d is fused or coupled with the third fiber filaments 3100d, and then cured to obtain Fig. 27 The porous body 30d is shown.

[0193] The porous body 30d prepared in this embodiment is defined by the third fiber filament 3100d and the first precursor material 3500d after fusion, coupling or combination; and the liquid-conducting hole 321d of the porous body 30d is defined by the inner hollow 3111d of the third fiber filament 3100d. Fig.28 A schematic diagram showing a partial surface of a porous body 30d prepared by vacuum hot melting and pressing of a third fiber filament 3100d and a first precursor material 3500d in one embodiment; Fig.28 As can be seen in FIG. 1 , the gaps 3400d between the third fiber filaments 3100d are all filled with the first precursor material 3500d. Furthermore, the first precursor material 3500d and the third fiber filaments 3100d are basically fused or coupled to form a whole.

[0194] In this embodiment, the third fiber filament 3100d may include glass fiber filaments, or the material of the third fiber filament 3100d includes glass material; accordingly, the first precursor material 3500d may also include glass material. The first precursor material 3500d may be a solid powder or a molten state and injected or filled into the gap 3400d.

[0195] For example, in some specific embodiments, the first precursor material 3500d can be a powder of glass material, which is injected into the gap 3400d for vacuum hot melting and pressing, so that it is fused or coupled with the surface of the third fiber filament 3100d in a molten state and connected into one body after cooling and solidification to form a porous body 30d. Or in some other variant embodiments, the molten first precursor material 3500d is injected into the gap 3400d and then cooled and solidified, so that they can be connected into one body to prepare a porous body 30d. In some embodiments, the material of the first precursor material 3500d is the same as that of the third fiber filament 3100d.

[0196] or Fig.29 , a schematic diagram of preparing a porous body by filling a low-melting-point first precursor material 3500e in the gaps 3400d of the third fiber filaments 3100d that are aggregated into bundles or bundles to prepare a porous body is shown in FIG. 1 ; in this embodiment, the glass material of the first precursor material 3500e is different from the glass or ceramic material of the third fiber filament 3100d. Also, the first precursor material 3500e is a low-melting-point glass material; the temperature at which the first precursor material 3500e and the third fiber filament 3100d are fused or coupled by hot melting and pressing is lower, which is beneficial for preparation. For example, in some specific embodiments, the first precursor material 3500e can be a low-melting-point glass with a melting point of 400 to 600°C, such as alkali borosilicate glass. Accordingly, the porous body prepared has two glass materials, one of which is a glass material derived from the first precursor material 3500e, and the other is a glass material derived from the third fiber filament 3100d.

[0197] or Fig.30 , a schematic diagram of another embodiment of the preparation process of a porous body is shown, in which the third fiber filaments 3100d aggregated into bundles or bundles are directly subjected to vacuum hot melt pressing or vacuum hot melt stretching to prepare a porous body. In the preparation of the porous body of this embodiment, the gaps 3400d between the third fiber filaments 3100d with inner hollows 3111d are not filled, but the temperature is raised to above the glass transition temperature of the third fiber filaments 3100d of the glass material in a vacuum hot melt press to perform hot melt pressing, so that the contact parts 3300d of adjacent third fiber filaments 3100d are fused or coupled to obtain a porous body. For example Fig.31 A specific embodiment is shown in accordance with Fig.30 SEM scanning image of part of the surface of the porous body prepared in the manner shown; Fig.31 As can be seen from the figure, the porous body 30 prepared in this embodiment has a circular first liquid-conducting hole defined by the inner hollow 3111d of the third fiber filaments 3100d, and a roughly triangular second liquid-conducting hole defined by the gaps 3400d between the third fiber filaments 3100d. Fig.31 In the porous body shown, both the first liquid conducting hole and the second liquid conducting hole penetrate from the first side to the second side.

[0198] or Fig.32 and Fig.33 A schematic diagram of an atomization assembly of another variant embodiment is shown; in this embodiment, the atomization assembly includes:

[0199] The porous body 30e comprises a first side 310e and a second side 320e opposite to each other; the porous body 30e comprises a first porous layer 311e and a second porous layer 312e; the first porous layer 311e is close to or defines the first side 310e, and the second porous layer 312e is close to or defines the second side 320e;

[0200] The heating element 40e is bonded to the second porous layer 312e and / or the second side 320e defined by the second porous layer 312e.

[0201] exist Fig.32 and Fig.33 As shown in , the thickness of the porous body 30e is 0.8-4 mm. Also, the thickness of the first porous layer 311e is greater than the thickness of the second porous layer 312e. For example, in a specific implementation, the thickness of the first porous layer 311e is 0.7-3.9 mm; the thickness of the second porous layer 312e is 0.1-0.5 mm.

[0202] exist Fig.32 and Fig.33 In the figure, the micropores in the first porous layer 311e are randomly distributed. Specifically, the first porous layer 311e includes porous ceramics, porous glass, etc. with disordered micropores inside; this type of first porous layer 311e with disordered micropores is prepared by adding pore-forming agent to ceramic or glass raw materials, injection molding into a green embryo, and then sintering; the pore-forming agent in the green embryo made by mixing the raw materials is randomly dispersed, so the micropores generated by the pore-forming agent during sintering are also randomly distributed.

[0203] exist Fig.32 and Fig.33 As shown, the second porous layer 312e has orderly arranged liquid-conducting holes 3121e therein; and the liquid-conducting holes 3121e are arranged along a predetermined direction. Fig.32 and Fig.33 As shown in FIG. 3 , the liquid guide hole 3121 e penetrates the second porous layer 312 e along the thickness direction.

[0204] In some embodiments, the second porous layer 312e is obtained by vacuum hot melting and then etching the fiber filaments described in the above embodiments; for example, the first fiber filaments 3100 and the second fiber filaments 3200 described above are polymerized and arranged into a bundle, and then vacuum hot melting, cutting, and etching are performed.

[0205] Alternatively, in some other embodiments, the second porous layer 312e is prepared by casting glass or ceramic slurry on the surface of the first porous layer 311e to form a dense thin layer precursor, and then forming liquid conducting holes 3121e by laser drilling or mechanical drilling.

[0206] Alternatively, in some embodiments, the first porous layer 311e and the second porous layer 312e of the porous body 30e are prefabricated independently and then firmly combined by bonding, mechanical connection, or the like.

[0207] In some embodiments, the diameter of the liquid conducting holes 3121e in the second porous layer 312e is 10-80 μm, and the ratio of the shortest distance between adjacent liquid conducting holes 3121e in the second porous layer 312e to the diameter of the liquid conducting holes 3121e is 0.1-1.

[0208] according to Fig.32 and Fig.33 As shown, the heating element 40e is fluid-permeable; the heating element 40e is provided with a plurality of perforations 431e for aerosol to pass through. In some embodiments, the heating element 40e is deposited on the surface of the second side 320e by vapor deposition, thick film printing, etc., and then the perforations 431e are formed by scraping or punching, so that the heating element 40e is fluid-permeable. Fig.32 As shown in FIG. 4 , the through-hole 431e on the heating element 40e is aligned with the liquid-conducting hole 3121e in the second porous layer 312e.

[0209] according to Fig.32 and Fig.33 As shown, the first electrode 51e and the second electrode 52e are respectively arranged at both ends of the length direction of the heating element 40e; the first electrode 51e and the second electrode 52e include at least one of an electrode sheet, an electrode coating, an electrode plate, etc., for guiding current in the length direction of the heating element 40e. In some embodiments, the first electrode 51e and the second electrode 52e are made of metal or alloy materials with low resistivity, such as gold, silver, copper or alloys thereof.

[0210] or Fig.34 A schematic diagram of an atomizing assembly of another variant embodiment is shown, in which the atomizing assembly comprises:

[0211] The porous body 30f includes a first side 310f and a second side 320f opposite to each other, wherein the first side 310f is arranged toward the liquid storage chamber 12 and is in fluid communication with the liquid storage chamber 12; a liquid guide hole 321f is also arranged in the porous body 30f, which runs from the first side 310f to the second side 320f, so as to transfer the liquid matrix from the first side 310f to the second side 320f;

[0212] A heating element 40f, used to heat at least a portion of the liquid matrix transferred by the liquid guide hole 321f to generate an aerosol;

[0213] The transition layer 60f is formed between the surface of the second side 320f of the porous body 30f and the heating element 40f.

[0214] In an embodiment, the transition layer 60f includes one or more of silicon, titanium, zirconium, iron, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, vanadium, gallium, samarium, zinc, tin, magnesium or oxides, nitrides or carbides thereof. In some embodiments, the transition layer 60f is formed between the surface of the second side 320f and the heating element 40f by vapor deposition or thermal spraying. It is beneficial to reduce or inhibit the deformation of the heating element 40f caused by the hot and cold cycle during use and to provide stress compensation, and to prevent the heating element 40f from loosening from the surface of the second side 320f. And in some other embodiments, the transition layer 60f provides bonding between the surface of the second side 320f and the heating element 40f, which is beneficial to improve the bonding strength between the heating element 40f and the porous body 30f.

[0215] exist Fig.34 In the embodiment shown, the porous body 30f is obtained by vacuum hot melting and then etching the fiber filaments described in the above embodiment; for example, the first fiber filaments 3100 and the second fiber filaments 3200 described above are polymerized and arranged into a bundle or a bundle, and are prepared by vacuum hot melting, cutting, and etching.

[0216] exist Fig.34 In the illustrated embodiment, the heating element 40f is arranged as a substantially planar heating element; and the heating element 40f includes a first electrode portion 41f and a second electrode portion 42f that are opposite to each other in the length direction, and a heating portion 43f extending between the first electrode portion 41f and the second electrode portion 42f. The heating portion 43f is used to heat the liquid matrix to generate an aerosol; the first electrode portion 41f and the second electrode portion 42f are used to conduct current on the heating portion 43f. After assembly, the electrical contact 21 passes through the distal end 120 into the atomizer 100 and abuts against the first electrode portion 41f and the second electrode portion 42f, thereby being used to power the heating element 40f. According to Fig.34 As shown, the heating portion 43f of the heating element 40f is fluid permeable; as used herein, "fluid permeable" means that an aerosol in a gas phase can easily pass through the heating portion 43f. Fig.34 As shown in the figure, the heating portion 43f is a tortuous shape so as to define hollows or holes, so that the fluid can penetrate. Or in some other embodiments, the heating portion 43f can be a mesh shape with mesh holes, so as to form a fluid-permeable. Or in some other embodiments, the heating portion 43f can be a printed, for example, S-shaped, Ω-shaped resistance heating track, and preferably the width of the track is not more than 2 mm.

[0217] Accordingly, the transition layer 60f also has holes 61f aligned with the liquid guide holes 321f, so that the transition layer 60f is also fluid permeable to avoid blocking the delivery of the liquid medium from the surface of the second side 320f to the heating portion 43f.

[0218] Alternatively, in some other embodiments, a protective layer is formed on the exposed surface of the heating element 40f by deposition or spraying; the protective layer includes relatively inert metals or their oxides, such as one or more of silver, gold, tungsten, platinum and their oxides. The protective layer is used to provide surface protection for the exposed surface of the heating element 40f, especially the heating portion 43f, to prevent the liquid matrix from corroding the metal component of the heating element 40f and / or to prevent the exposed surface of the heating portion 43f from oxidizing during long-term use.

[0219] Or in some other embodiments, the heating element 40f can be configured to be a mesh with mesh or a track shape extending in a circuitous manner, so that the heating element 40f is fluid permeable. Or in some other embodiments, the heating element 40f is a sheet heating element mounted on the second side 320f after cutting or etching a sheet substrate. Or in other embodiments, the heating element 40f includes a conductive track formed on the second side 320f by printing, deposition, etc.; specifically, the heating element 40f includes a printed circuitous or meandering conductive track. And the heating element 40f is bonded to the second side 320f of the porous body 30f by slurry pasting, mechanical fixing, etc.

[0220] Fig.35 A schematic diagram of a heating element 40g in another variant embodiment is shown. In this embodiment, the heating element 40g includes:

[0221] The first electrode portion 41g and the second electrode portion 42g are opposite to each other in the length direction, and the first resistance heating track 431g and the second resistance heating track 432g extend in a circuitous manner between the first electrode portion 41g and the second electrode portion 42g; the first resistance heating track 431g and the second resistance heating track 432g are bent and meandering; the shapes of the first resistance heating track 431g and the second resistance heating track 432g include multiple or several periodically presented track units, for example, including several track units approximately in a V shape or a W shape. The first resistance heating track 431g and the second resistance heating track 432g define a fluid permeable heating portion located between the first electrode portion 41g and the second electrode portion 42g.

[0222] Fig.36 A schematic diagram of a heating element 40h in another variant embodiment is shown. In this embodiment, the heating element 40h includes:

[0223] A first electrode portion 41h and a second electrode portion 42h facing each other in the length direction, and a heating portion 43h between the first electrode portion 41h and the second electrode portion 42h. The first electrode portion 41h and the second electrode portion 42h are dense metals or alloys in sheet form; the heating portion 43h is a fluid-permeable heating mesh. The heating portion 43h is a heating mesh woven from metal conductive wires; for example, the heating portion 43h is woven from transverse metal conductive wires arranged along the length direction of the heating element 40h and longitudinal metal conductive wires arranged along the width direction of the heating element 40h. In the woven heating portion 43h, the gaps between the metal conductive wires form capillary pores inside the heating portion 43h to release or pass aerosols.

[0224] In some implementations, the heating portion 43h is in the shape of a felt or mesh woven from metal conductive wires. Also, in some implementations, the resistivity of the material of the metal conductive wires woven to form the heating portion 43h is between 0.5 and 2 Ω mm. 2 / m. And, in some implementations, suitable metal conductive wires include: at least one of stainless steel conductive wires, iron-chromium-aluminum conductive wires, nickel-iron alloy wires, Hastelloy wires, Inconel alloy wires, nickel-chromium alloy wires, and monel alloy wires. And, in some implementations, the diameter of the metal conductive wires may range from about 0.01 mm to 0.1 mm.

[0225] according to Fig.36 As shown in the figure, the heating part 43h is provided with notches 432h on both sides in the width direction, so that the width dimension of the heating part 43h in the longitudinal direction is variable; and the notches 432h are used to change the temperature field distribution on the heating part 43h during the heating process. The edges on both sides of the heating part 43h in the width direction are curved. Fig.36 As shown in FIG. 4 , both sides of the heating portion 43h in the width direction have protruding teeth 431h defined between two adjacent notches 432h, which is beneficial for improving the uniformity of temperature distribution on the heating portion 43h.

[0226] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. An electronic atomization device, characterized in that: include: A liquid storage chamber, used for storing a liquid matrix; A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; The ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is less than 1.

0.

2. The electronic atomization device according to claim 1, characterized in that: The ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is between 0.1 and 0.

8.

3. The electronic atomization device according to claim 1 or 2, characterized in that: The shortest distance between adjacent liquid-conducting holes is between 5 μm and 35 μm.

4. The electronic atomization device according to claim 1 or 2, characterized in that: The diameter or width of the liquid-conducting hole is between 10 and 120 μm.

5. The electronic atomization device according to claim 1 or 2, characterized in that: At least part of the outer edge of the porous body is uneven; And / or, at least a portion of the outer edge of the porous body is in a serrated shape.

6. The electronic atomization device according to claim 1 or 2, characterized in that: The outer edge of the porous body is provided with convex teeth arranged at intervals; The air channel is at least partially defined by the gaps between adjacent protruding teeth to provide a path for air to enter the liquid storage chamber from the second side across the porous body.

7. The electronic atomization device according to claim 1 or 2, characterized in that: The porous body is formed at least in part by heat fusing a plurality of fiber filaments.

8. The electronic atomization device according to claim 7, characterized in that: The fiber filaments have a cross-sectional shape that is approximately a regular hexagon, a circle, or a square.

9. The electronic atomization device according to claim 7, characterized in that: The fiber filaments include at least one of glass fiber filaments or ceramic fiber filaments.

10. The electronic atomization device according to claim 7, characterized in that: The fiber filaments include solid fiber filaments and / or hollow fiber filaments.

11. The electronic atomization device according to claim 7, characterized in that: The fiber filament comprises an inner core and an outer covering layer covering the inner core.

12. The electronic atomization device according to claim 11, characterized in that: The inner core has a glass transition temperature higher than the outer wrap layer.

13. The electronic atomization device according to claim 1 or 2, characterized in that: The liquid conducting holes of the porous body are formed by chemical etching.

14. The electronic atomization device according to claim 1 or 2, characterized in that: The preparation of the porous body comprises: Obtaining a dense precursor having an etchable inner core disposed therein and extending through the dense precursor; The inner core of the dense precursor is chemically etched to remove the inner core of the dense precursor.

15. The electronic atomization device according to claim 1 or 2, characterized in that: The porous body comprises: A porous liquid-conducting portion, used for delivering a liquid matrix; the liquid-conducting holes are arranged in the porous liquid-conducting portion; A dense part surrounds the porous liquid-conducting part; the electronic atomization device provides support or retention for the porous body through the dense part.

16. The electronic atomization device according to claim 15, characterized in that: Also includes: A support for accommodating or holding the porous body; A flexible sealing element is located between the support and the dense portion to provide a seal therebetween.

17. The electronic atomization device according to claim 15, characterized in that: The porosity of the porous liquid-conducting part is between 30% and 80%.

18. The electronic atomization device according to claim 1 or 2, characterized in that: The porous body comprises: A porous liquid-conducting portion, used for delivering a liquid matrix; the liquid-conducting holes are arranged in the porous liquid-conducting portion; a dense portion surrounding the porous liquid-conducting portion; The porous liquid-conducting portion comprises a first fiber filament or is prepared from the first fiber filament, wherein the first fiber filament comprises an inner core and an outer wrapping layer wrapping the inner core; The dense portion includes or is made of the second fiber filaments.

19. The electronic atomization device according to claim 1 or 2, characterized in that: Also includes: A transition layer is arranged between the porous body and the heating element, and is used to prevent the heating element from falling off from the surface of the second side of the porous body due to thermal deformation.

20. The electronic atomization device according to claim 1 or 2, characterized in that: The transition layer includes at least one of silicon, titanium, zirconium, iron, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, vanadium, gallium, samarium, zinc, tin, magnesium or oxides, nitrides or carbides thereof.

21. An electronic atomization device, characterized in that: include: A liquid storage chamber, used for storing a liquid matrix; A porous body having a first side and a second side that are opposed to each other; the porous body comprising: a first porous layer, adjacent to or defining the first side, and in fluid communication with the liquid storage chamber for absorbing the liquid matrix; the pores in the first porous layer are randomly distributed; a second porous layer, close to or defining the second side; a plurality of liquid conducting holes are arranged in the second porous portion and penetrate the second porous layer in a thickness direction; and a ratio of the shortest distance between adjacent liquid conducting holes to the diameter or width of the liquid conducting holes is less than 1.0; The heating element is combined with the second porous layer and faces away from the first porous layer, and is used to heat the liquid substrate to generate aerosol.

22. An electronic atomization device, characterized in that: include: A liquid storage chamber, used for storing a liquid matrix; A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; The porous body is at least partially prepared by chemically etching a dense precursor having an etchable inner core to etch away the inner core.

23. The electronic atomization device according to claim 22, characterized in that: The dense precursor is formed by hot-melting a plurality of fiber filaments having the inner core.

24. An electronic atomization device, characterized in that: include: A liquid storage chamber, used for storing a liquid matrix; A porous body, comprising a first side in fluid communication with the liquid storage chamber and a second side away from the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; At least a portion of the outer edge of the porous body is in a sawtooth shape.

25. An atomization assembly for an electronic atomization device, characterized in that: include: A porous body, comprising a second side opposite to the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; The ratio of the shortest distance between adjacent liquid-conducting holes to the diameter or width of the liquid-conducting holes is less than 1.

0.

26. An atomization assembly for an electronic atomization device, characterized in that: include: A porous body, comprising a second side opposite to the first side; the porous body has a plurality of liquid conducting holes extending from the first side to the second side, so as to transfer the liquid matrix from the first side to the second side; a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol; The porous body is at least partially prepared by chemically etching a dense precursor having an etchable inner core to etch away the inner core.

27. A method for preparing an atomization component for an electronic atomization device, characterized in that: include: Obtaining a dense precursor including a first side and a second side opposite to each other, wherein an etchable inner core is arranged in the dense precursor and extends from the first side to the second side; removing the inner core of the dense precursor by chemical etching to obtain a porous body having pores extending from the first side to the second side; A heating element is formed on the second side of the porous body.

28. A method for preparing an atomization component for an electronic atomization device, characterized in that: include: Obtaining a plurality of first fiber strands, and fastening the plurality of first fiber strands into at least one fiber strand bundle; The first fiber filament comprises an inner core that can be etched and an outer covering layer covering the inner core; heat-melting the at least one bundle of fiber filaments to fuse the outer covering layers of the adjacent first fiber filaments to obtain a dense precursor having the inner core; chemically etching the dense precursor to remove the inner core and obtain a porous body; A heating element is formed on the porous body.

Images