Electronic atomization device and atomization assembly for electronic atomization device

Abstract

The present application provides an electronic atomization device and an atomization assembly for the electronic atomization device. The electronic atomization device comprises: a liquid storage cavity, used for storing a liquid substrate; a porous body, comprising a first side in fluid communication with the liquid storage cavity and a second side away from the first side, wherein the porous body is provided with a plurality of liquid guide holes running through the porous body from the first side to the second side so as to transfer the liquid substrate from the first side to the second side, and at least part of the surface of the porous body on the second side is a rough surface; and a heating element, bonded to the rough surface of the porous body on the second side and used for heating the liquid substrate to generate an aerosol, wherein the ratio of the thickness of the heating element to the surface roughness of the rough surface is greater than or equal to 2. In the electronic atomization device, the heating element is formed or bonded onto the rough surface having the surface roughness on the second side of the porous body, which is beneficial to increasing the bonding force between the heating element and the surface of the porous body.

Description

Electronic atomization device and atomization assembly for electronic atomization device

[0001]

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims priority to the Chinese patent application No. 202411103969.1, filed on August 12, 2024, entitled “Electronic atomization device and atomization assembly for electronic atomization device”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0004] The present application relates to the technical field of electronic atomization, and in particular to an electronic atomization device and an atomization assembly for the electronic atomization device. BACKGROUND

[0005] Tobacco products, such as cigarettes, cigars, and the like, burn tobacco during use to produce tobacco smoke. Attempts have been made to provide alternatives to these burning tobacco products by creating products that release compounds without burning.

[0006] Examples of such products are heat-not-burn devices that release compounds by heating, rather than burning, a material. For example, the material can be tobacco or other non-tobacco products, which can or can not contain nicotine. As another example, there are aerosol provision devices, such as so-called electronic atomization devices, which typically contain a liquid and produce an inhalable aerosol by heating the liquid with a heating element. In known electronic atomization devices, the heating element is arranged on a porous glass having through holes formed by laser drilling or mechanical drilling, etc. on a dense glass to form through holes in a predetermined direction, the through holes being used to transfer the liquid to the heating element for heating and atomization; the heating element is formed by deposition or printing, etc. and combined on the surface of the porous glass in known electronic atomization devices.

[0007] SUMMARY

[0008] One embodiment of the present application provides an electronic atomization device, comprising:

[0009] a liquid storage cavity for storing a liquid substrate;

[0010] a porous body comprising a first side in fluid communication with the liquid storage cavity and a second side facing away from the first side; the porous body has a plurality of liquid guide holes penetrating from the first side to the second side for transferring the liquid substrate from the first side to the second side; the surface of the second side of the porous body is at least partially a rough surface;

[0011] a heating element, combined with the rough surface of the second side of the porous body, for heating the liquid substrate to generate the aerosol; a ratio of a thickness of the heating element to a surface roughness of the rough surface is greater than or equal to 2.

[0012] In some embodiments, the heating element is configured to be a coating or plating layer formed on the rough surface by deposition or spraying or printing.

[0013] In some embodiments, the surface roughness of the rough surface is between 3 and 320 nm.

[0014] In some embodiments, the ratio of the thickness of the heating element to the surface roughness of the rough surface is between 10 and 200.

[0015] In some embodiments, the surface roughness of the rough surface is greater than or equal to 20 nm.

[0016] In some embodiments, the thickness of the heating element is less than or equal to 2.5 µm.

[0017] In some embodiments, the heating element comprises a first coating or plating layer and a second coating or plating layer formed in sequence; the first coating or plating layer is located between the porous body and the second coating or plating layer.

[0018] In some embodiments, a coefficient of thermal expansion of a material of the first coating or plating layer is less than a coefficient of thermal expansion of a material of the second coating or plating layer.

[0019] In some embodiments, the first coating or plating layer is made of or formed from chromium, titanium or alloys thereof;

[0020] Alternatively, the second coating or plating layer is made of or formed from stainless steel; or the second coating or plating layer is made of or formed from gold, platinum or alloys thereof.

[0021] In some embodiments, the thickness of the first coating or plating layer is between 200 nm and 2 µm.

[0022] In some embodiments, the rough surface is formed by at least one or more surface roughening treatments of at least part of the surface of the second side of the porous body, such as laser etching, chemical etching, sandblasting or mechanical polishing.

[0023] In some embodiments, at least part of the outer side edges of the porous body are uneven;

[0024] and / or, at least part of the outer side edges of the porous body are in a zigzag shape.

[0025] In some embodiments, the outer side edges of the porous body are provided with protrusions arranged at intervals.

[0026] an air passage defined at least in part by a gap between adjacent said protrusions to provide a path for air to pass from said second side across said porous body into said liquid storage chamber.

[0027] In some embodiments, the porous body comprises:

[0028] a porous liquid conducting portion for delivering a liquid substrate; said liquid conducting pores being arranged in said porous liquid conducting portion;

[0029] a dense portion surrounding said porous liquid conducting portion; said electronic atomization device providing support or retention to said porous body through said dense portion.

[0030] In some embodiments, further comprising:

[0031] a holder for housing or retaining said porous body;

[0032] a flexible sealing element between said holder and said dense portion for providing a seal therebetween.

[0033] In some embodiments, said porous body is configured to be substantially in a sheet-like shape;

[0034] and / or, said first side and said second side are opposite along a thickness direction of said porous body.

[0035] In some embodiments, said porous body comprises a third side and a fourth side opposite along a width direction;

[0036] said heating element is configured to be in a square or rectangular shape extending along a length direction of said porous body; said heating element is spaced apart from said third side with a first spacing therebetween; and / or, said heating element is spaced apart from said fourth side with a second spacing therebetween.

[0037] In some embodiments, a portion of said liquid conducting pores is within said first spacing and / or said second spacing.

[0038] Yet another embodiment of the present application further provides an electronic atomization device, comprising:

[0039] a liquid storage chamber for storing a liquid substrate;

[0040] a porous body comprising a first side and a second side opposite along a thickness direction, and a third side and a fourth side opposite along a width direction; said first side being in fluid communication with said liquid storage chamber; said porous body having a plurality of liquid conducting pores therethrough from said first side to said second side for delivering a liquid substrate from said first side to said second side;

[0041] a heating element coupled to a surface of the second side of the porous body and configured to heat the liquid substrate to generate the aerosol; the heating element is arranged in a rectangular or square shape extending along a length direction of the porous body; the heating element is spaced apart from the third side by a first spacing; and / or, the heating element is spaced apart from the fourth side by a second spacing;

[0042] a portion of the liquid guide holes is opposite to the heating element, and a portion of the liquid guide holes is within the first spacing and / or the second spacing.

[0043] Yet another embodiment of the present application provides an atomization assembly for an electronic atomization device, comprising:

[0044] a porous body comprising a first side and a second side opposite to each other, and a plurality of liquid guide holes extending through the porous body from the first side to the second side; a surface of the second side of the porous body is at least partially a rough surface;

[0045] a heating element coupled to the rough surface of the second side of the porous body; a ratio of a thickness of the heating element to a surface roughness of the rough surface is greater than or equal to 2.

[0046] Yet another embodiment of the present application provides an atomization assembly for an electronic atomization device, comprising:

[0047] a porous body comprising a first side and a second side opposite to each other along a thickness direction, and a third side and a fourth side opposite to each other along a width direction;

[0048] a heating element coupled to a surface of the second side of the porous body and configured to be arranged in a rectangular or square shape extending along a length direction of the porous body; the heating element is spaced apart from the third side by a first spacing; and / or, the heating element is spaced apart from the fourth side by a second spacing;

[0049] the porous body has a plurality of liquid guide holes extending through the porous body from the first side to the second side; a portion of the liquid guide holes is opposite to the heating element, and a portion of the liquid guide holes is within the first spacing and / or the second spacing.

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

[0051] a liquid storage cavity for storing a liquid substrate;

[0052] a porous body comprising a first side in fluid communication with the liquid storage cavity and a second side opposite to the first side; the porous body has a plurality of liquid guide holes extending through the porous body from the first side to the second side for transferring the liquid substrate from the first side to the second side;

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

[0054] a ratio of the shortest distance between adjacent liquid guiding holes to a diameter or width dimension of the liquid guiding holes is less than 1.0.

[0055] For approximately circular liquid guiding holes, the shortest distance between adjacent liquid guiding holes can be understood as the distance between them in a virtual straight line direction passing through the centers of the two adjacent liquid guiding holes. For non-circular liquid guiding holes such as triangular, quadrilateral, pentagonal, etc. non-circular liquid guiding holes, the shortest distance between adjacent liquid guiding holes can be understood as the separation distance in a virtual straight line direction passing through the geometric centers of the two adjacent liquid guiding holes.

[0056] For approximately circular liquid guiding holes, the diameter of a liquid guiding hole can be characterized as the distance between the center and the edge of the liquid guiding hole in the radial direction. Due to the distortion or deformation of the shape of the liquid guiding hole during preparation, the liquid guiding hole may not be a very standard circle, for example, it can be an ellipse or an approximately circular shape, etc. Therefore, for non-standard circular liquid guiding holes, the diameter of the liquid guiding hole can be characterized as the maximum width of the liquid guiding hole in the radial direction. For triangular, quadrilateral, pentagonal, etc. more shaped liquid guiding holes, the diameter of the liquid guiding hole can be characterized as the diameter of the circumscribed circle of the liquid guiding hole, i.e. twice the distance from the geometric center of the liquid guiding hole to one of the vertices.

[0057] In some embodiments, a ratio of the shortest distance between adjacent liquid guiding holes to a diameter or width dimension of the liquid guiding holes is between 0.1 and 0.8.

[0058] In some embodiments, the shortest distance between adjacent liquid guiding holes is between 5 and 35 μm.

[0059] In some embodiments, the diameter or width dimension of the liquid guiding holes is between 10 and 120 μm.

[0060] In some embodiments, at least part of the outer side edge of the porous body is uneven;

[0061] and / or, at least part of the outer side edge of the porous body is in a zigzag shape.

[0062] In some embodiments, the outer side edge of the porous body is provided with protrusions arranged at intervals;

[0063] an air passage at least partially defined by the gap between adjacent protrusions to provide a path for air to pass through the porous body from the second side into the liquid storage cavity.

[0064] In some embodiments, the porous body is at least partially formed by heat fusing a plurality of fiber filaments.

[0065] In some embodiments, the fiber filaments have a cross-sectional shape that is approximately a regular hexagon or a circle or a square.

[0066] In some embodiments, the fiber filaments comprise at least one of glass fiber filaments or ceramic fiber filaments.

[0067] In some embodiments, the fiber filaments comprise solid fiber filaments and / or hollow fiber filaments.

[0068] In some embodiments, the fiber filaments comprise an inner core and an outer cladding layer that clads the inner core.

[0069] In some embodiments, the inner core has a higher glass transition temperature than the outer cladding layer.

[0070] In some embodiments, the liquid conducting pores of the porous body are formed by chemical etching.

[0071] The above "chemical etching" is a commonly used term in the field of chemical processing, which refers to a process of using chemical reactions to corrode and remove a portion of an etched object, so that a portion of it is removed to form a void structure.

[0072] In some embodiments, the preparation of the porous body comprises:

[0073] obtaining a dense precursor having an etchable inner core disposed therein and extending through the dense precursor;

[0074] chemically etching the inner core of the dense precursor to remove the inner core of the dense precursor.

[0075] In some embodiments, the porous body comprises:

[0076] a porous liquid conducting portion for delivering a liquid substrate; the liquid conducting pores are disposed in the porous liquid conducting portion;

[0077] a dense portion surrounding the porous liquid conducting portion; the electronic atomization device provides support or retention to the porous body through the dense portion.

[0078] In some embodiments, further comprising:

[0079] a holder for accommodating or retaining the porous body;

[0080] a flexible sealing element between the holder and the dense portion for providing a seal therebetween.

[0081] In some embodiments, the porosity of the porous liquid conducting portion is between 30-80%.

[0082] In some embodiments, the porous body comprises:

[0083] a porous liquid conducting portion for delivering liquid substrate; the liquid conducting pores are arranged in the porous liquid conducting portion;

[0084] a dense portion surrounding the porous liquid conducting portion;

[0085] the porous liquid conducting portion comprises or is made of first fiber filaments, the first fiber filaments comprise an inner core and an outer cladding layer wrapping the inner core;

[0086] the dense portion comprises or is made of second fiber filaments.

[0087] In some embodiments, further comprising:

[0088] a transition layer arranged between the porous body and the heating element, the transition layer is configured to prevent the heating element from being detached from the surface of the second side of the porous body due to thermal deformation.

[0089] In some embodiments, the transition layer comprises 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 containing them.

[0090] Yet another embodiment of the present application further provides an electronic atomization device, comprising:

[0091] a liquid storage cavity for storing liquid substrate;

[0092] a porous body having a first side and a second side facing away from each other; the porous body comprises:

[0093] a first porous layer close to or defining the first side and in fluid communication with the liquid storage cavity to absorb liquid substrate; the pores in the first porous layer are distributed in disorder;

[0094] a second porous layer close to or defining the second side; the second porous portion is arranged with a plurality of liquid conducting pores penetrating through the second porous layer in the thickness direction; and the ratio of the shortest distance between adjacent liquid conducting pores to the diameter or width dimension of the liquid conducting pores is less than 1.0;

[0095] a heating element combined with the second porous layer and facing away from the first porous layer, and configured to heat the liquid substrate to generate aerosol.

[0096] Yet another embodiment of the present application further provides an electronic atomization device, comprising:

[0097] a liquid storage cavity for storing liquid substrate;

[0098] a porous body comprising a first side in fluid communication with the liquid storage cavity and a second side facing away from the first side; the porous body having a plurality of liquid conducting holes therethrough from the first side to the second side for transferring liquid substrate from the first side to the second side;

[0099] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0100] at least a portion of the porous body is prepared by chemical etching of a dense precursor having an inner core that can be etched away.

[0101] In some embodiments, the dense precursor is formed by heat fusing a plurality of fiber filaments having the inner core.

[0102] Yet another embodiment of the present application also provides an electronic atomization device, comprising:

[0103] a liquid storage cavity for storing liquid substrate;

[0104] a porous body comprising a first side in fluid communication with the liquid storage cavity and a second side facing away from the first side; the porous body having a plurality of liquid conducting holes therethrough from the first side to the second side for transferring liquid substrate from the first side to the second side;

[0105] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0106] at least a portion of the outer edge of the porous body is in a sawtooth shape.

[0107] Yet another embodiment of the present application also provides an atomization assembly for an electronic atomization device, comprising:

[0108] a porous body comprising a first side in fluid communication with the liquid storage cavity and a second side facing away from the first side; the porous body having a plurality of liquid conducting holes therethrough from the first side to the second side for transferring liquid substrate from the first side to the second side;

[0109] a heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0110] a ratio of the shortest distance between adjacent liquid conducting holes to the diameter or width dimension of the liquid conducting holes is less than 1.0.

[0111] Yet another embodiment of the present application also provides an atomization assembly for an electronic atomization device, comprising:

[0112] A porous body comprising a first side and a second side opposite to the first side; the porous body having a plurality of liquid conducting holes therethrough from the first side to the second side for transferring a liquid substrate from the first side to the second side;

[0113] A heating element coupled to the second side of the porous body for heating the liquid substrate to generate an aerosol;

[0114] The porous body is at least partially prepared by chemically etching a dense precursor having an inner core that can be etched to remove the inner core.

[0115] Yet another embodiment of the present application further provides a method for preparing an atomization assembly of an electronic atomization device, comprising:

[0116] Obtaining a dense precursor comprising a first side and a second side opposite to the first side; the dense precursor having an inner core that can be etched therethrough from the first side to the second side;

[0117] Removing the inner core of the dense precursor by chemical etching to obtain a porous body having holes therethrough from the first side to the second side;

[0118] Forming a heating element on the second side of the porous body.

[0119] Yet another embodiment of the present application further provides a method for preparing an atomization assembly of an electronic atomization device, comprising:

[0120] Obtaining a plurality of first fiber filaments and fastening the plurality of first fiber filaments into at least one bundle of fiber filaments; the first fiber filaments comprising an inner core that can be etched and an outer cladding layer wrapping the inner core;

[0121] Hot melting the at least one bundle of fiber filaments to fuse the outer cladding layers of adjacent first fiber filaments to obtain a dense precursor having the inner core;

[0122] Chemically etching the dense precursor to remove the inner core to obtain a porous body;

[0123] Forming a heating element on the porous body.

[0124] The above electronic atomization device, the heating element is formed on or coupled to a rough surface with surface roughness on the second side of the porous body, which is advantageous for improving the bonding force between the heating element and the surface of the porous body. BRIEF DESCRIPTION OF DRAWINGS

[0125] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these example are not intended to limit the embodiments, elements having the same reference numbers in the figures indicate like elements unless otherwise expressly stated, the figures in the drawings are not to scale.

[0126] FIG. 1 is a schematic diagram of an electronic atomization device according to an embodiment;

[0127] FIG. 2 is a schematic diagram of an atomizer according to an embodiment;

[0128] FIG. 3 is a schematic diagram of an atomization assembly according to an embodiment;

[0129] FIG. 4 is a schematic diagram of a first fiber according to an embodiment;

[0130] FIG. 5 is a schematic diagram of a second fiber according to an embodiment;

[0131] FIG. 6 is a schematic diagram of the first fiber and the second fiber being arranged according to an embodiment;

[0132] FIG. 7 is a schematic diagram of the first fiber and the second fiber being fused or coupled according to an embodiment;

[0133] FIG. 8 is a schematic diagram of a dense precursor formed by fusing or coupling the first fiber and the second fiber according to an embodiment;

[0134] FIG. 9 is a schematic diagram of a porous precursor formed by etching the dense precursor according to an embodiment;

[0135] FIG. 10 is a schematic diagram of a porous body formed by edge cutting and polishing the porous precursor according to an embodiment;

[0136] FIG. 11 is a scanning electron microscope (SEM) image of a portion of a surface of a porous body according to an embodiment;

[0137] FIG. 12 is a schematic diagram of a method of forming a heating element on a surface of a porous body according to an embodiment;

[0138] FIG. 13 is a schematic diagram of a heating element formed on a surface of a porous body according to an embodiment;

[0139] FIG. 14 is a magnified SEM image of a heating element formed on a surface of a porous body according to an embodiment;

[0140] FIG. 15 is a SEM image of a surface of a porous body after polishing according to an embodiment;

[0141] FIG. 16 is a micrograph of a surface of a porous body after sandblasting according to an embodiment;

[0142] FIG. 17 is a magnified SEM image of a heating element formed on a surface of a porous body according to an embodiment;

[0143] Figure 18 is an electron micrograph of a polished surface of the porous body of Figure 15, in an embodiment in which the heating element is formed by deposition on the polished surface;

[0144] Figure 19 is an electron micrograph of a polished surface of the porous body of Figure 15, in another embodiment in which the heating element is formed by deposition on the polished surface. Embodiments of the invention

[0145] For the purposes of facilitating an understanding of the present application, the present application will be described in greater detail below in conjunction with the accompanying drawings and specific embodiments.

[0146] One embodiment of the present application proposes an electronic aerosol-generating device, which can be seen from Figure 1, comprising an atomizer 100 storing a liquid substrate and atomizing the liquid substrate to generate an aerosol, and a power supply mechanism 200 supplying power to the atomizer 100. In the embodiment shown in Figure 1, the atomizer 100 and the power supply mechanism 200 of the electronic aerosol-generating device are separable or detachable relative to each other; the electronic aerosol-generating device having such an atomizer 100 and power supply mechanism 200 separable or detachable relative to each other is, for example, a so-called "refillable" electronic aerosol-generating device. Or in some other variant embodiments, the atomizer 100 and the power supply mechanism 200 of the electronic aerosol-generating device are fastened to be wrapped and fixed by a housing component of the electronic aerosol-generating device, so that the atomizer 100 and the power supply mechanism 200 cannot be formed to be detachable relative to each other from inside the housing component; the electronic aerosol-generating device having such an atomizer 100 and power supply mechanism 200 relative to each other is, for example, a so-called "integrated or disposable" electronic aerosol-generating device.

[0147] In an optional embodiment, such as shown in Figure 1, the power supply mechanism 200 comprises 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.

[0148] According to the exemplary embodiment shown in Figure 1, the atomizer 100 is arranged with an electrical contact 21 on the end 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 electrical contact 21 forms an electrical conduction by contacting and abutting against the electrical contact 230.

[0149] A seal 260 is provided in the power supply mechanism 200 and separates at least a portion of the interior space of the power supply mechanism 200 to form the above-mentioned receiving cavity 270 through the seal 260. In the exemplary embodiment shown in FIG. 1, the seal 260 is configured to extend perpendicular to the longitudinal direction of the power supply mechanism 200. The seal 260 is preferably made of a flexible material, thereby preventing liquid substrate flowing from the atomizer 100 to the controller 220, the sensor 250, and other components inside the power supply mechanism 200 from flowing to the receiving cavity 270.

[0150] In the exemplary embodiment shown in FIG. 1, the power supply mechanism 200 further includes an electric core 210 for supplying power, which extends along the length direction away from the other end of the receiving cavity 270; and a controller 220 provided between the electric core 210 and the receiving cavity 270, which is operable to guide the electric current between the electric core 210 and the electric contact 230.

[0151] In use, the power supply mechanism 200 includes a sensor 250 for sensing the suction airflow generated when the atomizer 100 is being puffed, and the controller 220 controls the electric core 210 to output electric current to the atomizer 100 according to the detection signal of the sensor 250.

[0152] In the exemplary embodiment shown in FIG. 1, 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 electric core 210.

[0153] FIG. 2 shows a structural schematic diagram of an embodiment of the atomizer 100 in FIG. 1, which includes:

[0154] The main housing 10; according to FIG. 2, the main housing 10 is generally longitudinally cylindrical, with an inner cavity for arranging necessary functional components for storing and atomizing liquid substrate; the main housing 10 has a proximal end 110 and a distal end 120 opposite along the length direction. The proximal end 110 is configured as the end for the user to inhale aerosol, and the air outlet 111 for the user to inhale is provided at the proximal end 110; while the distal end 120 is configured as the end for combining with the power supply mechanism 200.

[0155] Referring to FIG. 2, the interior of the main housing 10 is provided with a liquid storage cavity 12 for storing liquid substrate, and an atomization assembly for drawing liquid substrate from the liquid storage cavity 12 and atomizing the liquid substrate. In the schematic diagram shown in FIG. 2, an aerosol transmission pipe 11 is provided in the main housing 10 along the axial direction, and the space between the aerosol transmission pipe 11 and the inner wall of the main housing 10 forms the liquid storage cavity 12 for storing liquid substrate; the aerosol transmission pipe 11 extends to or terminates at the air outlet 111, so as to transmit the generated aerosol to the air outlet 111 for inhalation.

[0156] In some alternative embodiments, the aerosol delivery tube 11 and the main housing 10 are integrally molded from a moldable material, thereby defining the liquid storage chamber 12 between the aerosol delivery tube 11 and the main housing 10, and the liquid storage chamber 12 has an open end 120 opening distally.

[0157] Referring to Figs. 2-3, the atomizer 100 further comprises an atomization assembly for drawing and atomizing the liquid substrate from the liquid storage chamber 12 to generate an aerosol; in particular, the atomization assembly comprises:

[0158] a rigid porous body 30 generally configured in a plate or sheet shape; and the porous body 30 has a first side 310 and a second side 320 facing away from each other; the first side 310 is arranged towards the liquid storage chamber 12 and is in fluid communication with the liquid storage chamber 12;

[0159] a heating element 40 coupled to the second side 320 for heating at least part of the liquid substrate aerosol transmitted by the porous body 30.

[0160] Referring to the embodiment shown in Fig. 2, the atomizer 100 further comprises:

[0161] a rigid holder 20, for example made of organic polymer plastic or ceramic, etc.; the holder 20 is configured to accommodate and support the atomization assembly, in particular to accommodate the porous body 30;

[0162] a flexible sealing element 50, for example made of flexible material including silicone or thermoplastic elastomer, etc.; the sealing element 50 is at least partially located in the holder 20 and partially surrounds or encloses the porous body 30; the sealing element 50 is configured to provide a seal between the holder 20 and the porous body 30.

[0163] Referring to Figs. 2-3, 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 in a sheet shape. And the porous body 30 has a first side 310 and a second side 320 facing away from each other along the thickness direction. Wherein the first side 310 is arranged towards the liquid storage chamber 12 and is in fluid communication with the liquid storage chamber 12, for example, the first side 310 shown by the arrow R1 in Fig. 2 is in fluid communication with the liquid storage chamber 12 through the liquid passage 13 defined in the holder 20 to receive the liquid substrate; the surface of the second side 320 of the porous body 30 is configured as an atomization surface, and the heating element 40 is coupled to the surface of the second side 320 of the atomization surface / porous body 30.

[0164] According to FIG. 2, the porous body 30 is substantially arranged perpendicular to the longitudinal direction of the main housing 10; and a second side 320 of the porous body 30 and the distal end 120 of the main housing 10 define a misting chamber 340, which is located at the side of the porous body 30 facing away from the liquid storage chamber 12; the misting chamber 340 is used to accommodate the released aerosol. At least a portion of the heating element 40 is exposed to the misting chamber 340. When suction is applied, external air enters the misting chamber 340 through the air inlet 22 of the distal end 120, carries the aerosol in the misting chamber 340, and is output to the aerosol transmission tube 11, and then is sucked by the user at the air outlet 111, as shown by the arrow R2 in FIG. 2.

[0165] In some embodiments, the porous body 30 is a flat sheet or plate; and the surface of the first side 310 and / or the surface / misting surface of the second side 320 is a flatly extending plane. Or in yet other variant embodiments, the porous body 30 is a curved arc-shaped sheet; and the surface of the first side 310 and / or the surface / misting surface of the second side 320 is a curved surface.

[0166] In FIGS. 2-3, the porous body 30 is square in shape; or in yet other variant embodiments, the porous body 30 can have a generally circular, elliptical, polygonal, or other shape with side notches, etc. The porous body 30 can include at least one of glass, ceramic, carbon, metal, and high-temperature-resistant polymer plastic.

[0167] In the embodiments shown in FIGS. 2-3, the heating element 40 is a sheet-shaped heating element cut or etched from a sheet-shaped substrate and attached to the second side 320. Or in other variant embodiments, the heating element 40 includes a thin layer or conductive track formed on the second side 320 by printing, deposition, etc. Specifically, the heating element 40 includes a printed conductive track extending in a meandering or serpentine manner.

[0168] According to FIGS. 2-3, the porous body 30 includes:

[0169] The plurality of liquid guide holes 321 are through from the first side 310 to the second side 320, thereby transferring the liquid matrix from the first side 310 to the heating element 40 located on the second side 320 for heating and atomization.

[0170] In some embodiments, the plurality of liquid conducting holes 321 in the porous body 30 are straightly extended along the thickness direction of the porous body 30; or, the liquid conducting holes 321 are penetrated through the porous body 30 along the thickness direction of the porous body 30. In some embodiments, the plurality of liquid conducting holes 321 are orderly arranged in the porous body 30. The plurality of liquid conducting holes 321 are extended in a predetermined direction, rather than in a disorderly manner. In some embodiments, the plurality of liquid conducting holes 321 are arranged in an array in the porous body 30. In some embodiments, the plurality of liquid conducting holes 321 are capable of transferring liquid matrix from the first side 310 to the second side 320 at a predetermined rate. In some embodiments, the plurality of liquid conducting holes 321 are arranged in the porous body 30 in a honeycomb structure.

[0171] In some embodiments, the porous body 30 with the liquid conducting holes 321 is prepared by laser drilling or mechanical drilling on a dense substrate such as ceramic or glass.

[0172] In some embodiments, the porous body 30 with 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 drawing of fiber filaments followed by etching.

[0173] In some embodiments, the porous body 30 with 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 drawing of fiber filaments followed by etching.

[0174] S10, obtaining the first fiber filament 3100 shown in FIG. 4; the first fiber filament 3100 is a fiber filament with an inner core 3120 and an outer wrapping layer 3110. The inner core 3120 is etch-corrodible or dissolvable, and the outer wrapping layer 3110 is etch-resistant. In the embodiment shown in FIG. 4, the first fiber filament 3100 has a cross-sectional shape of approximately regular hexagon; the inner core 3120 is substantially circular. In the embodiment shown in FIG. 4, the first fiber filament 3100 can have at least one or more inner cores 3120.

[0175] S20, obtaining the second fiber filament 3200 shown in FIG. 5; the second fiber filament 3200 is without an inner core. The second fiber filament 3200 has the same cross-sectional shape of regular hexagon as the first fiber filament 3100. 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 the material of the outer wrapping layer 3110 of the first fiber filament 3100.

[0176] S30, arranging a plurality of the first fiber filaments 3100 and a plurality of the second fiber filaments 3200 in aggregation, and clamping the aggregation by the jig 4000 to form a bundle of fiber filaments or a bundle; in the arrangement shown in FIG. 6, the second fiber filaments 3200 are arranged on the outside, and the first fiber filaments 3100 are arranged on the inside; and the abutting surfaces 3300 are formed by abutting contact between adjacent fiber filaments.

[0177] S40, the bundle or the bundle of a plurality of first fiber filaments 3100 and a plurality of second fiber filaments 3200 arranged in Figure 6 is subjected to vacuum hot melt stretching or vacuum hot melt pressing, so that the abutting surface 3300 between them is partially fused or coupled after the abutting surface 3300 between them is partially fused at a temperature above the glass transition temperature, as shown in Figure 7; after the abutting surface 3300 between the plurality of first fiber filaments 3100 and the plurality of second fiber filaments 3200 in Figure 7 is fused, a dense precursor shown in Figure 8 is formed; in Figure 8, the abutting surface 3300 between the fiber filaments in the dense precursor is substantially eliminated by fusion or coupling.

[0178] S50, the dense precursor shown in Figure 8 is cut according to the thickness of the porous body 30 required, and the cut plurality of dense precursors is etched in an etching solution to dissolve or etch away the inner core 3120 in the dense precursor, thereby obtaining the porous precursor 300 shown in Figure 9; in the porous precursor 300, there are through holes 321 generated after the inner core 3120 is removed by etching with the etching solution. In some embodiments, the cutting is performed by cutter cutting or laser cutting.

[0179] S60, at least part of the outer edges of the porous precursor 300 shown in Figure 9 are cut and polished to make the edges smooth, thereby obtaining the porous body 30 shown in Figure 10. For example, in Figure 10, the two side edges of the porous body 30 in the length direction are cut and polished to form a flat surface. For example, in Figure 10, the two side edges of the porous body 30 in the width direction are not cut and polished, and the two side edges of the porous body 30 in the width direction are jagged or have different concave-convex shapes.

[0180] For example, Figure 11 shows an electron microscope magnified view of a part of the surface of the porous body 30 prepared in an embodiment; as can be seen from Figure 11, the residual traces of the abutting surface 3300 between the first fiber filaments 3100 and the second fiber filaments 3200 which are not completely fused and eliminated in the preparation can be seen faintly on the porous body 30.

[0181] In the embodiment, the first fiber filaments 3100 and the second fiber filaments 3200 are both solid fiber filaments.

[0182] According to the embodiment shown in Figures 10 and 11, the porous body 30 comprises:

[0183] a central porous liquid guiding portion 32, and a dense portion 31 surrounding or avoiding the porous liquid guiding portion 32; wherein the porous liquid guiding portion 32 is substantially arranged to define a liquid guiding and atomizing area, and the liquid guiding hole 321 is located in the porous liquid guiding portion 32; the dense portion 31 is mainly configured as an area for mounting and sealing fit.

[0184] In embodiments, the liquid guide holes 321 are located in the porous liquid guide portion 32 and avoid the dense portion 31.

[0185] In some embodiments, the length dimension of the porous liquid guide portion 32 is substantially between 1 / 3 and 4 / 5 of the length dimension of the porous body 30; for example, in the specific embodiments shown in FIG. 10 or FIG. 11, the length dimension of the porous liquid guide portion 32 is substantially between 2 / 3 and 3 / 4 of the length dimension of the porous body 30.

[0186] In the embodiments shown in FIG. 10 and FIG. 11, the dense portion 31 of the porous body 30 is substantially formed or defined by the second fiber filaments 3200 being fused or coupled after vacuum hot pressing or vacuum hot drawing. Also, the porous liquid guide portion 32 of the porous body 30 is substantially defined by the first fiber filaments 3100 being fused or coupled after vacuum hot pressing. The liquid guide holes 321 in the porous liquid guide portion 32 are formed by the inner cores 3120 of the first fiber filaments 3100 being etched away. As can be seen from FIG. 11, some areas of the dense portion 31 also have traces of the abutting surfaces 3300 between adjacent second fiber filaments 3200 that are not completely fused or coupled, and these traces can be eliminated by fusing or coupling them again through vacuum hot pressing.

[0187] In some embodiments, the first fiber filaments 3100 and the second fiber filaments 3200 are or include glass fiber filaments or ceramic fiber filaments or silicon fiber filaments. In some embodiments, the porous body 30 is a porous glass, a porous ceramic or a porous silicon.

[0188] In some embodiments, the vacuum hot pressing or vacuum hot drawing in step S40 can be performed using a glass fiber hot press or a composite material hot press forming machine or a vacuum furnace with a drawing function, etc.

[0189] In some embodiments, the etching liquid for glass or ceramic in step S50 can generally include an acidic etching liquid containing at least one of nitric acid, hydrochloric acid, hydrofluoric acid, or an alkaline etching liquid containing sodium hydroxide, etc. Accordingly, the outer cladding layer 3110 of the first fiber filaments 3100 and / or the second fiber filaments 3200 can be resistant to the acidic etching liquid; the inner core 3120 of the first fiber filaments 3100 can be etched or corroded by the acidic etching liquid. Alternatively, the outer cladding layer 3110 of the first fiber filaments 3100 and / or the second fiber filaments 3200 can be made of an acid-insoluble glass or ceramic material; the inner core 3120 of the first fiber filaments 3100 can be made of an acid-soluble glass or ceramic material.

[0190] In some embodiments, the material of the outer cladding layer 3110 of the first fiber filaments 3100 and / or the second fiber filaments 3200 includes at least one of high-purity quartz glass that is generally resistant to acid, ordinary silicate glass, borosilicate glass, etc.

[0191] In some embodiments, the material of the inner core 3120 of the first glass fiber 3100 comprises an acid-soluble boroaluminate glass. For example, in some specific embodiments, the material of the inner core 3120 of the first glass fiber 3100 comprises: 50-60wt% of B2O3, 5-10wt% of Al2O3, 30-40wt% of Na2O; for another example, in some specific embodiments, the material of the inner core 3120 of the first glass fiber 3100 comprises: 40-50wt% of SiO2, 20-30wt% of PbO, 20-40wt% of Na2O; for another example, in some specific embodiments, the material of the inner core 3120 of the first glass fiber 3100 comprises: 30-40wt% of SiO2, 30-40wt% of B2O3, 20-40wt% of K2O; the glass of these materials is relatively easy to be etched and removed in an acid etching solution of nitric acid and hydrofluoric acid.

[0192] In some embodiments, the first glass transition temperature (Tg1) of the glass material of the inner core 3120 of the first glass fiber 3100 is greater than the second glass transition temperature (Tg2) of the glass material of the outer cladding layer 3110 of the first glass fiber 3100 and / or the glass material of the second fiber 3200. Then, during the vacuum hot melting pressing or vacuum hot melting drawing process in step S40, the inner core 3120 of the first glass fiber 3100 is not softened when the first glass fiber 3100 and the second fiber 3200 are heated to a temperature condition lower than the second glass transition temperature (Tg2) and higher than the first glass transition temperature (Tg1) to fuse or couple them, which is convenient for preparation.

[0193] In some embodiments, the first glass transition temperature (Tg1) of the glass material of the inner core 3120 of the first glass fiber 3100 is between 800-1200℃. And in some embodiments, the second glass transition temperature (Tg2) of the glass material of the outer cladding layer 3110 of the first glass fiber 3100 and / or the glass material of the second fiber 3200 is between 500-800℃. Then, in step S40, the temperature condition of the vacuum hot melting pressing or vacuum hot melting drawing process is controlled to be between 550-750℃.

[0194] In some embodiments, the porous body 30 is prepared by fusing or coupling, cutting, etching the above first glass fiber 3100 and second fiber 3200.

[0195] Or in yet some other embodiments, the porous body 30 is prepared by only passing a plurality of the first fiber filaments 3100 through fusion or coupling, cutting, etching; then the prepared porous body 30 does not have the dense portion 31 formed by the first fiber filaments 3200, but only has the porous liquid conducting portion 32 formed by the first fiber filaments 3100.

[0196] In some embodiments, the porosity of the porous liquid conducting portion 32 of the prepared porous body 30 is 30-80%. And in some embodiments, the porosity of the dense portion 31 of the prepared porous body 30 is less than 1%, for example, the porosity of the prepared dense portion 31 is 0-1%.

[0197] In some embodiments, the diameter of the liquid conducting hole 321 in the prepared porous body 30 is 10-120 μm. The diameter of the liquid conducting hole 321 above can represent the distance between the center of the radial direction of the substantially circular liquid conducting hole 321 and the two points on the edge. And due to the preparation of hot melt pressing and etching, the shape of the prepared liquid conducting hole 321 can be distorted or deformed, so that they are not very standard circular shape, for example, they can be elliptical or approximately circular, etc.; thus, for the non-standard circular liquid conducting hole 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 40-100 μm.

[0198] Or in yet some other embodiments, the diameter of the liquid conducting hole 321 can be triangular, quadrilateral, pentagonal, etc.; thus, for the diameter of such non-circular liquid conducting hole 321, it can be characterized as twice the distance from the geometric center of the liquid conducting hole 321 to one of the vertices.

[0199] In some embodiments, the shortest distance between adjacent liquid conducting holes 321 in the porous body 30 is 5-35 μm. In some embodiments, the shortest distance d1 between adjacent liquid conducting holes 321 can be understood as the distance between them in the direction of the virtual straight line passing through the centers of the two adjacent liquid conducting holes 321 according to the illustration shown in FIG. 12. And for the non-circular liquid conducting holes 321 such as triangular, quadrilateral, pentagonal, etc., the shortest distance between the two adjacent liquid conducting holes 321 can be understood as the interval distance in the direction of the virtual straight line passing through the geometric centers of the two adjacent liquid conducting holes 321.

[0200] In some embodiments, the thickness of the porous body 30 is not less than 0.1 mm. In some embodiments, the thickness of the porous body 30 is 0.8-3.0 mm.

[0201] In some embodiments, the first fiber filament 3100 and the second fiber filament 3200 are of a hexagonal cross-sectional shape; and, the side length of the cross-section of the first fiber filament 3100 and / or the second fiber filament 3200 is between 0.8-1.6 mm. And, the inner core 3120 of the first fiber filament 3100 is of a circular shape; and, the inner core 3120 has a diameter of about 10-120 pm. Or more preferably, the diameter of the inner core 3120 is between 40-100 pm.

[0202] In yet other variant embodiments, the first fiber filament 3100 and / or the second fiber filament 3200 can have a square, triangular, polygonal, circular, or elliptical, etc. cross-sectional shape. And in yet other variant embodiments, the inner core 3120 of the first fiber filament 3100 can have a cross-sectional shape of about a square, triangular, polygonal, elliptical, etc.

[0203] Yet for example, in some embodiments, the first fiber filament 3100 and / or the second fiber filament 3200 are of a square cross-sectional shape; when they are collectively arranged in a bundle or a bundle of fiber filaments in a square, they are closely abutting and in contact with each other, and there is substantially no gap between them; and the edges of the bundle of fiber filaments formed after the collective arrangement and fastening of them are substantially flatly joined; accordingly, a porous body 30 with flat outer edges can be prepared. And in the porous body 30 prepared using the first fiber filament 3100 and the second fiber filament 3200 of a square cross-section, the liquid guiding holes 321 are arranged in a matrix or an array.

[0204] In some embodiments, as shown in FIGS. 2 and 10, 11, the sealing element 50 provides sealing by surrounding or being combined with the dense portion 31. Or, the stent 20 provides retention or support to the porous body 30 by being combined with or abutting against the dense portion 31.

[0205] In some embodiments, as shown in FIGS. 2 and 10, 11, the outer side edge of the porous body 30 has a plurality of spaced-apart protrusions 311. In the assembled state shown in FIG. 2, the air exchange passage is defined by the gap between adjacent protrusions 311; when the consumption of the liquid substrate causes the negative pressure in the liquid storage chamber 12 to exceed a predetermined threshold, the air in the aerosolization chamber 340 enters the liquid storage chamber 12 through the gap between adjacent protrusions 311 to relieve or eliminate the negative pressure in the liquid storage chamber 12. Or, the gap between adjacent protrusions 311 defines the air exchange passage to provide a passage path for air to pass through from the second side 320 to the first side 310 of the porous body 30.

[0206] According to FIGS. 12-14, the heating element 40 is formed on the surface / aerosolization surface of the second side 320 of the porous body 30 by deposition, e.g., vapor deposition; the heating element 40 comprises:

[0207] opposite ends of the length of the porous body 30; the first electrode portion 41 is formed between the porous liquid conducting portion 32 and the first end of the porous body 30; the second electrode portion 42 is formed between the porous liquid conducting portion 32 and the second end of the porous body 30. The heating portion 43 is formed in the porous liquid conducting portion 32. The first electrode portion 41 and the second electrode portion 42 define the electrical connection region of the heating element 40. And, the heating portion 43 defines the resistive heating region of the heating element 40.

[0208] In some embodiments, the first electrode portion 41 and / or the second electrode portion 42 is further arranged with an electrode, such as a first electrode on the first electrode portion 41 and a second electrode on the second electrode portion 42, by welding, soldering, or pasting, or by sintering silver paste, or the like. The material of the electrode can include gold, silver, copper, or other low resistivity metal or alloy.

[0209] Or in yet some embodiments, the first electrode portion 41 and / or the second electrode portion 42 is connected to the circuitry / power supply mechanism 200 by welding a conductive lead, or the like, so as to be used for the controller 220 / power supply mechanism 200 to provide power to the heating element 40.

[0210] In embodiments, the heating element 40 is formed on the second side 320 of the porous body 30 by printing, depositing, spraying, or printing, or the like, and then is tightly combined with the porous body 30. According to the embodiment shown in FIG. 13, the heating element 40 is substantially square or rectangular arranged along the length of the porous body 30. According to the embodiment shown in FIG. 13, the heating element 40 is substantially extended from the first end to the second end of the length of the porous body 30.

[0211] In the embodiment shown in FIG. 13, the first electrode portion 41 and the second electrode portion 42 are combined with the dense portion 31 of the porous body 30. In the embodiment shown in FIG. 13, the first electrode portion 41 and the second electrode portion 42 are dense. The porous body 30 has first and second ends opposite to each other along the length; the first electrode portion 41 is formed between the porous liquid conducting portion 32 and the first end of the porous body 30; the second electrode portion 42 is formed between the porous liquid conducting portion 32 and the second end of the porous body 30. The heating portion 43 is formed in the porous liquid conducting portion 32. The first electrode portion 41 and the second electrode portion 42 define the electrical connection region of the heating element 40. And, the heating portion 43 defines the resistive heating region of the heating element 40.

[0212] In the embodiment shown in FIG. 13, the heating portion 43 of the heating element 40 is fluid-permeable; as used herein, in relation to "fluid-permeable" means that aerosol in gas phase can easily pass through the heating portion 43. For example, as shown in FIG. 13, the heating portion 43 deposited or sprayed or printed on the surface / atomizing surface of the second side 320 of the porous body 30 can be in a mesh shape with mesh holes, thereby forming fluid-permeable. In the embodiment shown in FIG. 13, the mesh holes of the heating element 40 and / or the heating portion 43 are substantially aligned with the liquid guide holes 321, which are exposed at the port of the second side 320.

[0213] In the embodiments shown in FIGS. 12-14, the heating element 40 is substantially in a rectangular shape formed or bonded to the surface of the second side 32 of the porous body 30.

[0214] In the embodiments shown in FIGS. 13-14, the heating element 40 does not entirely cover the surface of the second side 32 of the porous body 30. For example, as shown in FIGS. 13 and 14, the heating element 40 is spaced apart or has a spacing from both sides of the porous body 30 in the width direction. For example, as shown in FIGS. 13 and 14, the porous body 30 has a third side and a fourth side opposite to each other in the width direction; the heating element 40 is spaced apart from the third side and has a first spacing d11; the heating element 40 is spaced apart from the fourth side and has a second spacing d12. In some embodiments, the first spacing d11 and / or the second spacing d12 is between 0.5-2 mm.

[0215] In the embodiments shown in FIGS. 13-14, the porous liquid guide portion 32 is at least partially located within the first spacing d11 and / or the second spacing d12 in the width direction. A portion of the liquid guide holes 321 is opposite to the heating portion 43 of the heating element 40, and a portion is located within the first spacing d11 and / or the second spacing d12 and thus staggered or avoided from the heating portion 43.

[0216] According to the embodiment shown in FIG. 12, the process of preparing the heating element 40 on the atomizing surface of the porous body 30 includes:

[0217] S100, surface treatment is performed on the atomizing surface of the porous body 30 to form a rough surface with roughness on the atomizing surface;

[0218] S200, the heating element 40 is formed on a portion of the rough surface of the second side 320 by deposition or spraying.

[0219] In embodiments, by performing surface treatment to roughen the atomizing surface of the porous body 30 before forming the heating element 40, the heating element 40 has more uniform thickness and / or bonding strength on the atomizing surface.

[0220] In some embodiments, the heating element 40 is made or formed of an electrically resistive metal or alloy.

[0221] In some embodiments, the heating element 40 is a coating or plating formed on the surface of the porous body 30 by spraying or printing or depositing, etc.

[0222] In some embodiments, the heating element 40 can have only one coating or plating formed by spraying or depositing or printing, etc. In some embodiments, the heating element 40 can include at least two or more layers of coating or plating.

[0223] In the embodiment shown in FIG. 3, the heating element 40 includes a first coating or plating layer 410 and a second coating or plating layer 420 formed in sequence. The coefficient of thermal expansion of the material of the first coating or plating layer 410 is less than the coefficient of thermal expansion of the material of the second coating or plating layer 420.

[0224] In embodiments, the low coefficient of thermal expansion of the first coating or plating layer 410 is advantageous for reducing or inhibiting deformation of the heating element 40 caused by cold-heat cycles in use and providing stress compensation, preventing the heating element 40 from coming off the surface of the second side 320.

[0225] In some embodiments, the material of the first coating or plating layer 410 includes one or more of chromium, titanium, zirconium, tungsten, chromium, niobium, tantalum, molybdenum, vanadium, etc. Or in yet other embodiments, the material of the first coating or plating layer 410 includes one or more oxides of silicon, titanium, zirconium, iron, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, vanadium, gallium, samarium, zinc, tin, magnesium. In some embodiments, the material of the first coating or plating layer 410 includes titanium, zirconium, niobium, tantalum, molybdenum, iron, or alloys thereof and metal oxides formed after oxidation of the alloys. Or in yet other embodiments, the material of the first coating or plating layer 410 includes at least one of carbides such as boron carbide, silicon carbide, tungsten carbide, titanium carbide, zirconium carbide, hafnium carbide, tantalum carbide, titanium nitride carbide, etc., and nitrides such as aluminum nitride, titanium nitride, silicon nitride, tantalum nitride, boron nitride, zirconium nitride, chromium nitride, titanium aluminum nitride (TiAlN), titanium aluminum carbonitride (TiAlCN), etc.

[0226] In a specific embodiment, the first coating or plating layer 410 is a titanium layer, a chromium layer, or an alloy layer containing titanium or chromium. Or, the material of the first coating or plating layer 410 is formed of titanium, chromium, or alloys thereof.

[0227] In some embodiments, the thickness of the first coating or plating layer 410 is between 20 nm and 2.5 µm.

[0228] In some embodiments, the first coating or plating 410 and the second coating or plating 420 formed on the surface of the second side 320 of the porous body 30 are fluid permeable.

[0229] In some embodiments, the second coating or plating 420 comprises at least one of iron, palladium, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, gallium, or alloys containing them. In some embodiments, the second coating or plating 420 comprises carbides and / or nitrides of at least one of palladium, nickel, aluminum, tungsten, chromium, niobium, tantalum, molybdenum, gallium.

[0230] In some embodiments, the second coating or plating 420 comprises at least one of silver, gold, platinum. In some specific embodiments, the material of the second coating or plating 420 is stainless steel. In some specific embodiments, the material of the second coating or plating 420 is gold, platinum, or alloys thereof.

[0231] In some embodiments, the thickness of the second coating or plating 420 is less than 2 pm.

[0232] In some embodiments, the thickness of the heating element 40 including one or more coatings or platings is less than or equal to 2.5 pm.

[0233] In some embodiments, the controller 220 / power supply mechanism 200 controls the power supplied to the heating element 40 to be about 5-20 W.

[0234] In some embodiments, the surface power density carried by the heating portion 43 of the heating element 40 is less than 1 W / mm 2 . In some embodiments, by having the heating portion 43 with an area of 5-20 mm 2 , the surface power density carried by the heating portion 43 is less than 1 W / mm 2 when the controller 220 / power supply mechanism 200 supplies power to the heating element 40.

[0235] In yet some embodiments, the surface power density carried by the heating portion 43 of the heating element 40 is greater than 0.4 W / mm 2 . So that the heating portion 43 can generate sufficient resistive joule heat in operation.

[0236] In some embodiments, the surface treatment to roughen the atomizing surface of the porous body 30 can include at least one or more of laser etching, chemical etching, sandblasting, or mechanical polishing. In yet other embodiments, the surface treatment to roughen the atomizing surface of the porous body 30 can include sandblasting or polishing. In some specific or optional embodiments, the chemical etching is, for example, etching with a chemical reagent such as NaOH or HF solution, etc. In some specific or optional embodiments, the laser etching is, for example, infrared or ultraviolet laser etching, etc.

[0237] In embodiments, the atomizing surface of the porous body 30 is formed into a frosted surface with a surface microstructure after the surface roughening treatment. In embodiments, the atomizing surface of the porous body 30 is a rough surface with unevenness.

[0238] In embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a roughness Ra of 3-320 nm. In more preferred embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a roughness Ra of 50-320 nm. In yet more preferred embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a roughness Ra of no more than 200 nm.

[0239] In which, the "surface roughness" is a term in the field of machining, referring to the unevenness of the machining surface with small pitch and tiny peaks and valleys. In actual provisions and uses, the surface roughness has multiple characterization parameters, for example, the national standard GB / T 1031-2009 "Surface Structure Profile Method Surface Roughness Parameters and Their Numerical Values" details the relevant terms and evaluation parameter standards of surface roughness; among them, the height characteristic parameter, the pitch characteristic parameter, and the shape characteristic parameter can all be used to measure the surface roughness.

[0240] The above "Ra, i.e. the profile arithmetic mean deviation" is one of the height characteristic parameters of the surface roughness; in the national standard GB / T 1031-2009 "Surface Structure Profile Method Surface Roughness Parameters and Their Numerical Values", it is detected and calculated by the arithmetic mean of the profile deviation absolute value within the sampling length lr.

[0241] In yet other embodiments, before the roughening surface treatment of the surface / atomizing surface of the second side 320 of the porous body 30, it can also include: performing a smoothing treatment such as polishing or polishing treatment on the surface / atomizing surface of the second side 320 of the porous body 30; by first performing a smoothing treatment to eliminate surface defects such as surface pores, burrs, or protrusions, it is beneficial to improve the consistency of the roughness of the atomizing surface of the porous body 30 in subsequent mass production.

[0242] Fig. 15 shows a micrograph of the atomized surface of the porous body 30 after the surface polishing treatment to eliminate surface defects such as dimples or burrs or protrusions on the atomized surface of the cut-prepared porous body 30. As can be seen from Fig. 15, the atomized surface after the surface polishing treatment is flat or smooth, substantially completely eliminating surface defects such as residual traces of fiber boundary fusion, burrs or protrusions. Fig. 16 shows a micrograph of the atomized surface of the porous body 30 after the sandblasting to form a roughened surface on the atomized surface of the porous body 30 after the polishing treatment in Fig. 15. As can be seen from Fig. 16, the atomized surface after the further sandblasting treatment forms a rough structure with unevenness.

[0243] In some embodiments, the depositing of the heating element 40 on the partial area of the roughened surface of the second side 320 in step S200 can include chemical vapor deposition or physical vapor deposition. In some embodiments, the spraying of the heating element 40 on the partial area of the roughened surface of the second side 320 in step S200 can include plasma spraying or the like.

[0244] Fig. 17 shows a SEM magnified view of the heating element 40 of an alloy material of gold and platinum vapor-deposited on the atomized surface of the porous body 30 after the roughening treatment in one embodiment. Figs. 18 and 19 show SEM magnified views of the heating element 40 of an alloy material of gold and platinum vapor-deposited on the atomized surface of the porous body 30 before the roughening treatment in two comparative examples.

[0245] As can be seen from Figs. 18 and 19, the heating element 40 vapor-deposited has large unbound areas on the atomized surface of the porous body 30, i.e. a large number of black void areas formed in the alloy material of the heating element 40 in Figs. 18 and 19, due to the unbound alloy material of gold and platinum on the atomized surface of the porous body 30. This makes the overall thickness of the prepared heating element 40 uneven, and there are a large number of cracks or voids that cannot continuously conduct electricity, making the resistance of the prepared heating element 40 unstable. As can be seen from the magnified view of the embodiment in Fig. 17, on the atomized surface of the porous body 30 after the roughening treatment, the overall thickness of the heating element 40 deposited is uniform, and there are substantially no black void areas as in Figs. 18 and 19.

[0246] The following table shows the data of the resistance values measured by the electrical contacts 21 on the heating element 40 under different cycle times of heating and cooling at a constant working power of 7.5W after the surface / atomizing surface of the second side 320 of the porous body 30 prepared by cutting in the examples deposited a heating element 40 (including a titanium layer of 0.8pm and a gold-platinum alloy layer of 0.65pm) with a deposition width of 1.8mm and a thickness of 1.45pm, without and with roughening treatment, respectively. Among them, the cycle of heating and cooling is a cycle of repeatedly supplying power to the heating element 40 at a constant working power of 7.5W for 3s to heat the liquid substrate and then cooling for 20s. Among them, R0 is the initial resistance value measured by the electrical contacts 21 on the heating element 40 before the heating and cooling cycle test; R100 is the resistance value measured by the electrical contacts 21 on the heating element 40 when the heating and cooling cycle is 100 times; R200 is the resistance value measured by the electrical contacts 21 on the heating element 40 when the heating and cooling cycle is 200 times; R400 is the resistance value measured by the electrical contacts 21 on the heating element 40 when the heating and cooling cycle is 400 times; R800 is the resistance value measured by the electrical contacts 21 on the heating element 40 when the heating and cooling cycle is 800 times; R1000 is the resistance value measured by the electrical contacts 21 on the heating element 40 when the heating and cooling cycle is 1000 times.

[0247]

[0248] In the above table, the surface roughness of the atomizing surface of the porous body 30 after surface polishing treatment to eliminate defects such as burrs, protrusions, etc. after cutting in sample 2 is approximately 1 nm, and the thickness of the heating element 40 of the titanium layer and the gold-platinum alloy layer deposited by vapor deposition. The surface roughness of the atomizing surface of the porous body 30 after polishing and then laser etching roughening treatment in sample 3 is approximately 5 nm. From the test results in the above table, it can be seen that the surface / atomizing surface of the second side 320 of the porous body 30 after melting, cutting, and etching of the first fiber filament 3100 and the second fiber filament 3200 has surface defects such as burrs due to cutting processing, and the flatness and uniformity of the heating element 40 formed by vapor deposition are insufficient, and the resistance R200 measured after 200 times of heating and cooling cycle test has increased significantly compared to the initial resistance R0.

[0249] In some embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a roughness greater than 5 nm. In more preferred embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a roughness greater than or equal to 20 nm. In some preferred embodiments, the surface / atomizing surface of the second side 320 of the porous body 30 has a surface roughness Ra between 50 nm and 200 nm.

[0250] In some embodiments, the ratio of the thickness of the heating element 40 to the surface roughness Ra of the atomizing surface of the porous body 30 is greater than or equal to 2. In some more preferred embodiments, the ratio of the thickness of the heating element 40 to the surface roughness Ra of the atomizing surface of the porous body 30 is greater than or equal to 3. In some more preferred embodiments, the ratio of the thickness of the heating element 40 to the surface roughness Ra of the atomizing surface of the porous body 30 is between 10 and 200.

[0251] The following table shows the data of the resistance values measured by the electrical contact 21 for different heating and cooling cycles of the heating element 40 at a constant working power of 7.5 W, in another embodiment, for a plurality of samples with atomizing surfaces having different surface roughness Ra and thicknesses of the heating element 40. In this embodiment, the heating element 40 has a titanium layer as the first plating layer and an alloy layer of gold and platinum as the second plating layer; the width of the heating element 40 is 1.6 mm; and the thickness of the second plating layer is constant at 0.6 pm, and the thickness of the first plating layer is adjusted according to the thickness of the heating element 40 so that the overall thickness of the heating element 40 is the thickness in each sample in the table below. In the test, the heating and cooling cycle is repeated with the heating element 40 powered at a constant working power of 7.5 W for 3 s of suction time to heat the liquid substrate and then cooled for 20 s. In the table, R0 is the initial resistance value measured by the electrical contact 21 for the heating element 40 before the heating and cooling cycle test; R100 is the resistance value measured by the electrical contact 21 for the heating element 40 after 100 heating and cooling cycles; R200 is the resistance value measured by the electrical contact 21 for the heating element 40 after 200 heating and cooling cycles; R400 is the resistance value measured by the electrical contact 21 for the heating element 40 after 400 heating and cooling cycles; R800 is the resistance value measured by the electrical contact 21 for the heating element 40 after 800 heating and cooling cycles; and R1000 is the resistance value measured by the electrical contact 21 for the heating element 40 after 1000 heating and cooling cycles.

[0252]

[0253] From the measured resistance results in the above table, it can be seen that when the surface roughness Ra of the atomizing surface is about 3 nm, the deposited plating layer of the heating element 40 has bonding defects due to the smooth surface, the initial resistance R0 exceeds the appropriate range of 2.0 Ω, and the resistance value measured by the partial pressure detection after 100 heating cycles is basically not measurable, which may be that the plating layer of the heating element 40 is broken or peeled off after use. From the measured resistance results in the above table, it can be seen that in the interval of the surface roughness Ra of 20 nm to 320 nm and the ratio of the thickness of the heating element 40 to the surface roughness Ra of 4.4 to 60, the measured data is relatively good.

[0254] It should be noted that the description and drawings merely illustrate the principles of the application. It will thus be further appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the application and are thus within its spirit and scope.

Claims

1. An electronic atomizing device, characterized by, The application relates to an aerosol generating device. The application relates to an aerosol generating device. The application relates to an aerosol generating device. The application relates to an aerosol generating device.

2. The electronic atomizing device of claim 1, wherein, The application relates to an aerosol generating device.

3. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device.

4. The electronic atomizing device of claim 3, wherein, The application relates to an aerosol generating device.

5. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device.

6. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device.

7. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device.

8. The electronic atomizing device of claim 7, wherein, The application relates to an aerosol generating device.

9. The electronic atomizing device of claim 7, wherein, The application relates to an aerosol generating device. The application relates to an aerosol generating device.

10. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device.

11. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device. The application relates to an aerosol generating device.

12. The electronic atomizing device of claim 1 or 2, wherein, The application relates to an aerosol generating device. The application relates to an aerosol generating device.

13. The electronic atomizing device of claim 12, wherein, The application relates to an aerosol generating device.

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The application relates to an aerosol generating a heating element attached to a surface of the second side of the porous body and configured to heat a liquid substrate to generate an aerosol; the heating element is arranged in a rectangular or square shape extending along a length direction of the porous body; the heating element is spaced apart from the third side by a first distance; and / or the heating element is spaced apart from the fourth side by a second distance; a portion of the liquid passage is opposite to the heating element, and a portion of the liquid passage is within the first distance and / or the second distance.

15. An atomization assembly for an electronic atomization device, comprising: comprising: a porous body comprising a first side and a second side opposite to each other, and a plurality of liquid passages extending from the first side to the second side; a heating element attached to a surface of the second side of the porous body; a ratio of a thickness of the heating element to a surface roughness of the surface of the second side of the porous body is greater than or equal to 2.

16. An atomization assembly for an electronic atomization device, comprising: comprising: a porous body comprising a first side and a second side opposite to each other along a thickness direction, and a third side and a fourth side opposite to each other along a width direction; a heating element attached to a surface of the second side of the porous body and configured to be arranged in a rectangular or square shape extending along a length direction of the porous body; the heating element is spaced apart from the third side by a first distance; and / or the heating element is spaced apart from the fourth side by a second distance; the porous body has a plurality of liquid passages extending from the first side to the second side; a portion of the liquid passage is opposite to the heating element, and a portion of the liquid passage is within the first distance and / or the second distance.

Images