Atomizer, electronic atomization device, and method for manufacturing
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- PHILIP MORRIS PRODUCTS SA
- Filing Date
- 2024-06-27
- Publication Date
- 2026-05-27
Smart Images

Figure CN2024102035_23012025_PF_FP_ABST
Abstract
Description
Atomizer, Electronic Atomization Device, and Method for ManufacturingTechnical Field
[0001] An atomizer, an electronic atomization device, and an induction heating element for the atomizer.Background Art
[0002] Tobacco products (such as cigarettes, cigars, etc. ) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release compounds without burning.
[0003] An example of such products is heating devices, which release compounds by heating instead of burning materials. 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 delivery products, such as so-called electronic atomization devices. These devices typically include a liquid that is heated to vaporize it, thereby producing an inhalable aerosol. In a known electronic atomization device, a mesh-like induction heating element heats a liquid under the penetration of a magnetic field to generate an aerosol. The aerosol passes through the mesh of the mesh-like induction heating element and is then released in an airflow channel and delivered to the user. For example, FIG. 1 shows a schematic view of an existing cylindrical induction heating element 1 and FIG. 2 shows a schematic view of an existing planar mesh-like induction heating element 1a. During use, there are multiple magnetic flux paths on the mesh-like induction heating element 1 / 1a, as indicated by arrow 2a in FIG. 2, thereby causing the magnetic field intensity to be dispersed among multiple magnetic flux paths (or magnetic paths) 2a when heat is generated under penetration by the varying magnetic field. Based on Maxwell's theory, under the same input magnetic field energy, this results in a relatively slow temperature rise for the induction heating element 1 / 1a.Summary of the Invention
[0004] According to an aspect of the invention, an atomizer is provided. The atomizer comprises:
[0005] a liquid storage chamber for storing a liquid substrate,
[0006] an induction heating element that is capable of generating heat by being penetrated by a varying magnetic field, thereby heating the liquid substrate to produce an aerosol; wherein the induction heating element comprises at least one notch such that the induction heating element is fluid-permeable; and the induction heating element defines at least one and / or no more than two magnetic circuit portions extending in a longitudinal direction, providing at least one and / or no more than two magnetic flux paths through the induction heating element.
[0007] The induction heating element may define at least one magnetic circuit portion extending in the longitudinal direction and providing at least one magnetic flux path through the induction heating element. Alternatively or in addition, the induction heating element may define no more than two magnetic circuit portions extending in the longitudinal direction and providing no more than two magnetic flux paths through the induction heating element.
[0008] Each magnetic circuit portion may provide a corresponding magnetic flux path.
[0009] In some embodiments, the induction heating element is a planar heating element. Alternatively, in some variant embodiments, the induction heating element is a curved heating element.
[0010] In some embodiments, the magnetic circuit portions are arranged extending in a continuous and uninterrupted manner in the longitudinal direction of the induction heating element.
[0011] In some embodiments, the magnetic circuit portions extend in a planar manner in the longitudinal direction of the induction heating element.
[0012] In some embodiments, the induction heating element has a mass of 1 mg –30 mg.
[0013] In some embodiments, the atomizer further comprises a liquid guiding element, including a liquid absorption surface and an atomizing surface. The liquid absorption surface may be fluidly connected to the liquid storage chamber for absorbing the liquid substrate. The liquid guiding element may be configured to draw liquid substrate at the liquid absorption surface and to deliver the drawn liquid substrate to the induction heating element. The liquid guiding element may be permeable to the liquid substrate. The liquid guiding element may be a wicking element. The liquid guiding element may be configured to supply the liquid substrate to the induction heating element.
[0014] The liquid guiding element may comprise a fibrous material or consist of a fibrous material. The liquid guiding element may comprise non-woven fabrics, or fiberglass cord, or example. The liquid guiding element may comprise cotton or consist of cotton. The liquid guiding element may comprise a ceramic material or consist of a ceramic material. The liquid guiding element may comprise or be made of a hard capillary structure such as porous ceramic, porous glass-ceramic, porous glass. The liquid guiding element may be configured to be soaked with the liquid substrate.
[0015] The induction heating element may be provided on the liquid guiding element. The induction heating element may be provided on the atomizing surface of the liquid guiding element. The induction heating element may be provided as a separate part from the liquid guiding element. The induction heating element may be provided without being bonded to the liquid guiding element, or the atomizing surface. The induction heating element may be bonded to the atomizing surface.
[0016] A main extension plane of the induction heating element may extend in parallel to the atomizing surface. A main extension plane of the induction heating element may extend in parallel to the liquid absorption surface. The induction heating element may be flat.
[0017] The induction heating element may be configured to be inductively heated by being subjected to a varying magnetic field, thereby heating liquid substrate from the liquid storage chamber to generate aerosol. The induction heating element may be formed as a susceptor layer.
[0018] The induction heating element may comprise a metal material. The metal material may comprise steel or stainless steel, in particular SUS430, or grade 430 stainless steel (SS430) , or grade 420 stainless steel (SS420) , or one or more alloys containing iron and nickel, such as Permalloy.
[0019] The at least one notch may be defined by an outer edge of the induction heating element. The at least one notch may be formed in a side edge of the induction heating element. The at least one notch may extend through the induction heating element in a direction perpendicular to a main extension plane of the induction heating element. The at least one notch may be open in a width direction perpendicular to the longitudinal direction. The at least one notch may be open along or against the longitudinal direction. The at least one notch may be open along at least one direction parallel to the main extension plane of the induction heating element. The induction heating element may not fully surround the at least one notch in the main extension plane of the induction heating element.
[0020] In some embodiments, the induction heating element comprises a first side and a second side opposite the first side along a width direction. The width direction may be perpendicular to the longitudinal direction. A main extension plane of the induction heating element may be parallel to the longitudinal direction and to the width direction. The width direction may be a lateral direction.
[0021] The at least one notch may comprise one or a plurality of first notches arranged on the first side and / or one or a plurality of second notches arranged on the second side.
[0022] In some embodiments, the plurality of first notches are arranged spaced apart along the longitudinal direction, thereby causing the first side to have a serrated shape.
[0023] In some embodiments, the plurality of second notches are arranged spaced apart along the longitudinal direction, thereby causing the second side to have a serrated shape.
[0024] The at least one notch may be open in at least one direction parallel to the main extension direction of the induction heating element. The at least one notch may be open in a width direction or a direction against or along the longitudinal direction.
[0025] The at least one notch may be defined by tooth portions extending from a main body portion of the induction heating element. The tooth portions may define the at least one notch between them. Each notch may be defined by two opposing tooth portions. The tooth portions may be spaced from each other along the longitudinal direction. The tooth portions may be spaced from each other along a width direction. The tooth portions may extend from the main body portion of the induction heating element along a width direction. The tooth portions may extend from the main body portion along or against the longitudinal direction.
[0026] In some embodiments, the plurality of first notches are arranged spaced apart along the longitudinal direction, thereby defining a plurality of first tooth portions between the adjacent first notches.
[0027] In some embodiments, the plurality of second notches are arranged spaced apart along the longitudinal direction, thereby defining a plurality of second tooth portions between the adjacent second notches.
[0028] The atomizer may retain the induction heating element through one or more of the tooth portions. One or more of the tooth portions may be clamped between opposing parts of the atomizer. One of the opposing parts may be the liquid guiding element. One of the opposing parts may be a partition wall of the atomizer at least partially defining an airflow channel. One or more of the tooth portions may be clamped between the liquid guiding element and a partition wall of the atomizer at least partially defining an airflow channel. The partition wall may be an internal partition wall of the atomizer. The partition wall may generally extend along the longitudinal direction. A main extension plane of the induction heating element may be parallel to the partition wall.
[0029] The atomizer may retain the induction heating element through at least one of the first tooth portions and / or at least one of the second tooth portions. One or more of the tooth portions may be clamped between opposing parts of the atomizer, in particular between the liquid guiding element and the partition wall of the atomizer.
[0030] In some embodiments, the first notches are located between the magnetic circuit portions and the first side.
[0031] In some embodiments, the second notches are located between the magnetic circuit portions and the second side.
[0032] In some embodiments, the width dimension of the induction heating element varies in the longitudinal direction.
[0033] The induction heating element may comprise a main body portion.
[0034] In some embodiments, the induction heating element comprises a first end and a second end opposite the first end along the longitudinal direction. The induction heating element may extend along the longitudinal direction from the first end to the second end.
[0035] The induction heating element may comprise at least one first extension portion, in particular one or a plurality of first extension portions, extending from the main body portion of the induction heating element and / or from the magnetic circuit portions toward the first end and terminating at the first end.
[0036] The induction heating element may comprise at least one second extension portion, in particular one or a plurality of second extension portions, extending from the main body portion of the induction heating element and / or from the magnetic circuit portions toward the second end and terminating at the second end.
[0037] In some embodiments, the atomizer retains the induction heating element through the at least one first extension portions and / or through the at least one second extension portion. The at least one first extension portion and / or the at least one second extension portion may be clamped between opposing parts of the atomizer. One of the opposing parts may be the liquid guiding element. One of the opposing parts may be a partition wall of the atomizer at least partially defining an airflow channel. The at least one first extension portion and / or the at least one second extension portion may be clamped between the liquid guiding element and a partition wall of the atomizer at least partially defining an airflow channel. The partition wall may be an internal partition wall of the atomizer. The partition wall may generally extend along the longitudinal direction. A main extension plane of the induction heating element may be parallel to the partition wall.
[0038] In some embodiments, the induction heating element or a main body portion of the induction heating element has a generally rectangular shape. The generally rectangular shape may render more stability during high-speed serial production of the induction heating element, or during assembly of the atomizer.
[0039] In some embodiments, the induction heating element or a main body portion of the induction heating element comprises perforations or through-holes. The perforations or through-holes may open in a direction perpendicular to a main extension plane of the induction heating element. The perforations or through-holes may face towards an airflow channel provided in the atomizer. The perforations or through-holes may open along a direction of flow of the liquid substrate through the liquid guiding element. The perforations or through-holes may facilitate that liquid substrate evaporated by the heat of the induction heating element flows through the induction heating element to mix with air flowing in an airflow channel of the atomizer to form an aerosol. The perforations or through-holes may have a rectangular shape or cross-section, or a square shape or cross-section, for example. A rectangular or square shape of the perforations or through-holes may enable a reduced mass of the induction heating element as compared to circular holes, for example, thus improving efficiency by reducing energy consumption.
[0040] In contrast to a notch, a perforation or through-hole may be fully surrounded by the induction heating element or a main body of the induction heating element in a main extension plane of the induction heating element.
[0041] In some embodiments, the induction heating element or a main body portion of the induction heating element is formed as a mesh. The mesh may have perforations or through-holes. A main extension plane of the mesh may be parallel to the longitudinal direction. A main extension plane of the mesh may be parallel to the atomizing surface of the liquid guiding element.
[0042] In some embodiments, a width of the at least one and / or no more than two magnetic circuit portions is between 1 / 4 and 1 / 2 of a width dimension of the induction heating element.
[0043] In some embodiments, the at least one and / or no more than two magnetic circuit portions extend from the first end to the second end along the longitudinal direction of the induction heating element.
[0044] In some embodiments, the atomizer extends along the longitudinal direction from a first end of the atomizer to a second end of the atomizer. The first end of the atomizer may be an air inlet end. The second end of the atomizer may be an air outlet end. At the air inlet end, the atomizer may have an air inlet. At the air outlet end, the atomizer may have an air outlet, through which aerosol can be delivered to a user. At the air inlet end, the atomizing device may be connected to a power supply mechanism.
[0045] One or both of the liquid guiding element and the induction heating element may be laterally offset from a longitudinal center axis of the atomizer. A longitudinal center axis of the atomizer may extend through the liquid guiding element or the induction heating element.
[0046] The atomizer may comprise a tubular first partition wall at least partially traversing the liquid storage cavity. The tubular first partition wall may centrally extend through the liquid storage chamber. The tubular first partition wall may extend in parallel to the longitudinal direction. The tubular first partition wall may comprise an inner end configured to receive aerosol generated by the induction heating element. The tubular first partition wall may comprise an outer end forming the air outlet configured to release the aerosol to an outside of the atomizer for consumption by a user. The liquid storage chamber may circumferentially extend around the tubular first partition wall.
[0047] The atomizing device may comprise at least one liquid supply channel connecting the liquid storage chamber and the liquid absorption surface. The at least one liquid supply channel may comprise exactly one liquid supply channel or more than one liquid supply channel. The at least one liquid supply channel may comprise at least two liquid supply channels.
[0048] Each liquid supply channel may be connected to the liquid storage chamber via a separate opening of the liquid storage chamber.
[0049] The atomizer may comprise a proximal part and a distal part. The proximal part may comprise the second end, or air outlet end. The distal part may comprise the first end or air inlet end. The proximal part may be downstream of the distal part with respect to the longitudinal direction.
[0050] The proximal part of the atomizer may have an oval or elliptical cross-section in sectional planes that are perpendicular to the longitudinal direction. A length of the proximal part in a first width direction may be smaller than a length of the proximal part in a second width direction. The first width direction and the second width direction may be perpendicular to the longitudinal direction. The first width direction may be perpendicular to the second width direction. The first width direction may be the width direction along which the length of the proximal part is smallest of all width directions, that is of all directions that are perpendicular to the longitudinal direction. The second width direction may be the width direction along which the length of the proximal part is greatest of all width directions, that is of all directions that are perpendicular to the longitudinal direction.
[0051] A main extension plane of the induction heating element is preferably parallel to the second width direction, that is the width direction along which the proximal part has its largest extension. In particular, the main extension plane of the induction heating element is parallel to the second width direction and the longitudinal direction. One or both of the atomizing surface and the liquid absorption surface of the liquid guiding element are preferably parallel to the second width direction and the longitudinal direction. Alternatively, or both of the atomizing surface and the liquid absorption surface of the liquid guiding element are perpendicular to the second width direction and the longitudinal direction.
[0052] Along the longitudinal direction, a step portion may be provided between the distal part and the proximal part of the atomizer. At the step portion, a diameter of the atomizer may increase from the distal part to the proximal part in a stepwise manner.
[0053] At the step portion, a diameter of the atomizer may increase along the longitudinal direction by at least a factor of 1.4, or at least a factor of 1.6, or at least a factor of 1.8, or at least a factor of 2, or at least a factor of 2.2, or at least a factor of 2.4, or at least a factor of 2.6, or at least a factor of 2.8, or at least a factor of 3, or at least a factor of 3.5, when measuring the diameter along a width direction in which the diameter of the proximal part is largest, or along a width direction along which the diameter of the proximal part is smallest.
[0054] The distal part of the atomizer may have a cylindrical shape. A longitudinal center axis of the distal part may extend through the induction heating element, or the liquid guiding element.
[0055] According to a further aspect of the present invention, an atomizer is provided. The atomizer comprises:
[0056] a liquid storage chamber for storing a liquid substrate;
[0057] a liquid guiding element fluidly connected to the liquid storage chamber for absorbing the liquid substrate; and
[0058] an induction heating element provided on the liquid guiding element and capable of heating the liquid substrate to generate an aerosol by being penetrated by a varying magnetic field;
[0059] wherein the induction heating element has a first end and a second end opposite the first end along a longitudinal direction, and wherein the induction heating element comprises:
[0060] a main body portion extending along the longitudinal direction;
[0061] at least one first extension portion, in particular one first extension portion or a plurality of first extension portions, extending from the main body portion toward the first end and terminating at the first end;
[0062] at least one second extension portion, in particular one second extension portion or a plurality of second extension portions, extending from the main body portion toward the second end and terminating at the second end.
[0063] The induction heating element may be bonded to the liquid guiding element.
[0064] In some embodiments, the atomizer retains the induction heating element through the at least one first extension portion and / or through the at least one second extension portion.
[0065] In some embodiments, the atomizer retains the induction heating element through at least one of the first extension portions and / or at least one of the second extension portions.
[0066] The at least one first extension portion and / or the at least one second extension portion may be clamped between opposing parts of the atomizer. One of the opposing parts may be the liquid guiding element. One of the opposing parts may be a partition wall of the atomizer at least partially defining an airflow channel. The at least one first extension portion and / or the at least one second extension portion may be clamped between the liquid guiding element and a partition wall of the atomizer at least partially defining an airflow channel. The partition wall may be an internal partition wall of the atomizer. The partition wall may generally extend along the longitudinal direction. A main extension plane of the induction heating element may be parallel to the partition wall. In some embodiments, a transverse width of the main body portion varies along the longitudinal direction.
[0067] In some embodiments, the main body portion comprises a first section, a second section and a third section arranged in sequence along the longitudinal direction.
[0068] In some embodiments, a width of the second section is less than a width of the first section and the third section.
[0069] In some embodiments, the induction heating element further comprises:
[0070] a first side and a second side opposite the first side along a width direction;
[0071] one or a plurality of first notches arranged on the first side; and / or one or a plurality of second notches arranged on the second side.
[0072] In some embodiments, the plurality of first notches are arranged spaced apart along the longitudinal direction, thereby causing the first side to have a serrated shape.
[0073] In some embodiments, the plurality of second notches are arranged spaced apart along the longitudinal direction, thereby causing the second side to have a serrated shape.
[0074] In some embodiments, the induction heating element or a main body portion of the induction heating element has a rectangular shape.
[0075] In some embodiments, the induction heating element or a main body portion of the induction heating element is formed as a mesh. The mesh may have perforations or through-holes. A main extension plane of the mesh may be parallel to the longitudinal direction. The perforations or through-holes may face perpendicular to the main extension plane of the mesh.
[0076] In some embodiments, the induction heating element further comprises:
[0077] a first side and a second side opposite the first side along a width direction;
[0078] one or a plurality of first tooth portions extending from the main body portion toward the first side;
[0079] one or a plurality of second tooth portions extending from the main body portion toward the second side;
[0080] wherein the extension length of the first tooth portions and / or the second tooth portions extending from the second section is greater than the extension length of the first tooth portions and / or the second tooth portions extending from the first section; or, the extension length of the first tooth portions and / or the second tooth portions extending from the second section is greater than the extension length of the first tooth portions and / or the second tooth portions extending from the third section.
[0081] According to another aspect of the invention, an electronic atomization device is provided. The electronic atomization device comprises:
[0082] the atomizer according to one of the aspects, embodiments or examples described herein; and
[0083] a power supply mechanism comprising:
[0084] a receiving chamber having an opening, wherein during use, at least a portion of the atomizer is removably received inside the receiving chamber through the opening; and
[0085] an induction coil arranged around the receiving chamber to generate a varying magnetic field, wherein when the atomizer is received within the receiving chamber, the induction heating element is configured to be heated by the varying magnetic field generated by the induction coil.
[0086] The opening of the receiving chamber may open along the longitudinal direction. The induction coil may be wound around an axis parallel to the longitudinal direction. The induction coil may be wound around a center axis of the receiving chamber parallel to the longitudinal direction.
[0087] The induction heating element may be centered in relation to a length of the induction coil along the longitudinal direction, when the atomizer is received in the receiving chamber. The induction heating element longitudinally centered in the induction coil may efficiently be heated by the induction coil via induction heating.
[0088] Alternatively, the induction heating element may be offset from a center of the induction coil along the longitudinal direction.
[0089] The receiving chamber may be configured to receive the distal part of the atomizer. The distal part of the atomizer may be inserted into the receiving chamber against the longitudinal direction. The proximal part of the atomizer may remain outside the receiving chamber and / or outside the power supply mechanism, when the atomizer is coupled to the power supply mechanism. The receiving chamber may have a cylindrical shape corresponding to the shape of the distal part.
[0090] According to another aspect of the invention, an induction heating element for an atomizer that is capable of generating heat by being penetrated by a varying magnetic field is provided. The induction heating element has notches or perforations arranged on it, making the induction heating element fluid-permeable; and the induction heating element defines no more than two magnetic circuit portions extending in the longitudinal direction, providing no more than two magnetic flux paths through the induction heating element.
[0091] In embodiments, the fluid-permeable induction heating element may have no more than two magnetic circuit portions, which significantly reduces the effective magnetic circuit area when the induction heating element generates heat from being penetrated by a varying magnetic field, resulting in more concentrated magnetic flux lines on the induction heating element, thus achieving a faster heating rate.
[0092] According to another aspect of the invention, a method for manufacturing an induction heating element for an atomizer is provided. An induction heating material that is capable of generating heat by being penetrated by a varying magnetic field is provided. An induction heating element having notches rendering the induction heating element fluid-permeable is formed from the induction heating material.
[0093] The induction heating material may comprise a metal material. The metal material may comprise steel or stainless steel, in particular SUS430, or grade 430 stainless steel (SS430) , or grade 420 stainless steel (SS420) , or one or more alloys containing iron and nickel, such as Permalloy, for example.
[0094] Forming the induction heating element may comprise printing, or stamping, or etching, in particular chemical etching, or cutting, in particular laser cutting or water jet cutting, for example.
[0095] Features and description set out in the context of any one of the aspects, embodiments or examples described herein may be combined with or transferred to any other of the aspects, embodiments or examples described herein. The method described herein may be suitable, adapted and / or configured to manufacture the induction heating element of any of the atomizers described herein.
[0096] The present disclosure also encompasses the following numbered examples as embodiments:
[0097] Example Ex1: An atomizer, comprising:
[0098] a liquid storage chamber for storing a liquid substrate; and
[0099] an induction heating element that is capable of heating the liquid substrate to generate an aerosol by being penetrated by a varying magnetic field, wherein the induction heating element comprises a notch or a perforation such that the induction heating element is fluid-permeable; and wherein the induction heating element defines no more than two magnetic circuit portions that extend in a longitudinal direction, providing no more than two magnetic flux paths through the induction heating element.
[0100] Example Ex2: The atomizer according to Example Ex1, wherein the induction heating element is a planar heating element.
[0101] Example Ex3: The atomizer according to Example Ex1 or Ex2, wherein the magnetic circuit portions are arranged extending in a continuous and uninterrupted manner in the longitudinal direction of the induction heating element.
[0102] Example Ex4: The atomizer according to any one of Examples Ex1 to Ex3, wherein the magnetic circuit portions extend in a straight manner in the longitudinal direction of the induction heating element.
[0103] Example Ex5: The atomizer according to any one of Examples Ex1 to Ex4, wherein the induction heating element has a mass of 1 mg to 30 mg.
[0104] Example Ex6: The atomizer according to any one of Examples Ex1 to Ex5, further comprising a liquid guiding element, wherein the liquid guiding element includes a liquid absorption surface and an atomizing surface, wherein the liquid absorption surface is in fluid communication with the liquid storage chamber for absorbing the liquid substrate; and wherein the induction heating element is bonded to the atomizing surface.
[0105] Example Ex7: The atomizer according to any one of Examples Ex1 to Ex6, wherein the induction heating element comprises a first side and a second side opposite the first side along a width direction; and
[0106] wherein the notch comprises one or a plurality of first notches arranged on the first side and / or one or a plurality of second notches arranged on the second side.
[0107] Example Ex8: The atomizer according to Example Ex7, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that the first side has a serrated shape; and / or
[0108] the plurality of second notches are arranged spaced apart along the longitudinal direction such that the second side has a serrated shape.
[0109] Example Ex9: The atomizer according to Example Ex7 or Ex8, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that a plurality of first tooth portions are defined between adjacent first notches; and / or
[0110] the plurality of second notches are arranged spaced apart along the longitudinal direction such that a plurality of second tooth portions are defined between adjacent second notches;
[0111] wherein the atomizer retains the induction heating element in place through at least one of the first tooth portions and / or at least one of the second tooth portions.
[0112] Example Ex10: The atomizer according to any one of Examples Ex7 to Ex9, wherein the one or plurality of first notches are located between the magnetic circuit portions and the first side; and / or
[0113] the one or plurality of second notches are located between the magnetic circuit portions and the second side.
[0114] Example Ex11: The atomizer according to any one of Examples Ex1 to Ex10, wherein the width dimension of the induction heating element is variable along the longitudinal direction.
[0115] Example Ex12: The atomizer according to any one of Examples Ex1 to Ex11, wherein the induction heating element comprises a first end and a second end opposite the first end along the longitudinal direction, and wherein:
[0116] one or a plurality of first extension portions extend from the magnetic circuit portions toward the first end and terminate at the first end; and / or
[0117] one or a plurality of second extension portions extend from the magnetic circuit portions toward the second end and terminate at the second end;
[0118] wherein the atomizer retains the induction heating element through at least one of the first extension portions and / or at least one of the second extension portions.
[0119] Example Ex13: The atomizer according to any one of Examples Ex1 to Ex12, wherein the width of the magnetic circuit portions is between 1 / 4 and 1 / 2 of the width dimension of the induction heating element.
[0120] Example Ex14: The atomizer according to any one of Examples Ex1 to Ex13, wherein the magnetic circuit portions extend between first and second ends along the longitudinal direction of the induction heating element.
[0121] Example Ex15: An atomizer, comprising:
[0122] a liquid storage chamber for storing a liquid substrate,
[0123] a liquid guiding element fluidly connected to the liquid storage chamber for absorbing the liquid substrate;
[0124] an induction heating element bonded to the liquid guiding element and capable of heating the liquid substrate to generate an aerosol by being penetrated by a varying magnetic field;
[0125] wherein the induction heating element has a first end and a second end opposite the first end along the longitudinal direction, and wherein the induction heating element comprises:
[0126] a main body portion extending along the longitudinal direction;
[0127] one or a plurality of first extension portions extending from the main body portion toward the first end and terminating at the first end;
[0128] one or a plurality of second extension portions extending from the main body portion toward the second end and terminating at the second end.
[0129] Example Ex16: The atomizer according to Example Ex15, wherein the atomizer is configured to retain the induction heating element by the first extension portions and / or the second extension portions.
[0130] Example Ex17: The atomizer according to Example Ex15 or Ex16, wherein the transverse width of the main body portion is variable along the longitudinal direction.
[0131] Example Ex18: The atomizer according to any one of Examples Ex15 to Ex17, wherein the main body portion comprises a first section, a second section and a third section arranged in sequence along the longitudinal direction, wherein the width of the second section is less than the width of the first section and the width of the third section.
[0132] Example Ex19: The atomizer according to any one of Examples Ex15 to Ex18, wherein the induction heating element further comprises:
[0133] a first side and a second side opposite the first side along a width direction;
[0134] one or a plurality of first notches are arranged on the first side;
[0135] one or a plurality of second notches are arranged on the second side;
[0136] Example Ex20: The atomizer according to Example Ex19, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that the first side has a serrated shape; and / or
[0137] the plurality of second notches are arranged spaced apart along the longitudinal direction such that the second side has a serrated shape.
[0138] Example Ex21: The atomizer according to any one of Examples Ex15 to Ex20, wherein the induction heating element further comprises:
[0139] a first side and a second side arranged opposite the first side along the width direction;
[0140] one or a plurality of first tooth portions extend from the main body portion toward the first side;
[0141] one or a plurality of second tooth portions extend from the main body portion toward the second side;
[0142] wherein the extension length of the first tooth portions and / or the second tooth portions extending from the second section is greater than the extension length of the first tooth portions and / or the second tooth portions extending from the first section; or, the extension length of the first tooth portions and / or the second tooth portions extending from the second section is greater than the extension length of the first tooth portions and / or the second tooth portions extending from the third section.
[0143] Example Ex22: An electronic atomization device, comprising:
[0144] the atomizer according to any one of Examples Ex15 to Ex21; and
[0145] a power supply mechanism comprising:
[0146] a receiving chamber having an opening, wherein during use, at least a portion of the atomizer is removably received in the receiving chamber through the opening; and
[0147] an induction coil arranged around the receiving chamber to generate a varying magnetic field, wherein when the atomizer is received in the receiving chamber, the induction heating element may be heated by the varying magnetic field generated by the induction coil.
[0148] Example Ex23: An induction heating element for an atomizer, wherein the induction heating element is capable of generating heat by being penetrated by a varying magnetic field; wherein the induction heating element has notches or perforations arranged on it, rendering the induction heating element fluid-permeable; and wherein the induction heating element defines no more than two magnetic circuit portions extending in the longitudinal direction, providing no more than two magnetic flux paths through the induction heating element.
[0149] Description of Accompanying Drawings
[0150] One or more embodiments are exemplified by the figures in the corresponding accompanying drawings, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the accompanying drawings are similar elements. Unless specifically stated, the figures in the accompanying drawings are not to scale.
[0151] FIG. 1 is a schematic diagram of an existing induction heating element;
[0152] FIG. 2 is a schematic diagram of yet another existing induction heating element;
[0153] FIG. 3 is a schematic diagram of an electronic atomization device according to an embodiment;
[0154] FIG. 4 is a structural schematic diagram of an embodiment of the atomizer of FIG. 3;
[0155] FIG. 5 is an exploded schematic diagram of a view of the atomization assembly of FIG. 4;
[0156] FIG. 6 is a schematic diagram of yet another view of the induction heating element of FIG. 4;
[0157] FIG. 7 is a schematic diagram of the induction heating element according to yet another embodiment;
[0158] FIG. 8 is a schematic diagram of the induction heating element according to yet another embodiment;
[0159] FIG. 9 is a schematic diagram of the induction heating element according to yet another embodiment;
[0160] FIG. 10 is a schematic diagram of the induction heating element according to yet another embodiment;
[0161] FIG. 11 is a schematic diagram of the induction heating element according to yet another embodiment;
[0162] FIG. 12 is a schematic diagram of the induction heating element according to yet another embodiment;
[0163] FIG. 13 is a schematic diagram showing the arrangement of the induction heating element within a second housing in an embodiment;
[0164] FIG. 14 is a schematic diagram showing the arrangement of the induction heating element within the second housing in yet another embodiment;
[0165] FIG. 15 is a schematic diagram of the induction heating element according to yet another embodiment.
[0166] Specific Embodiments
[0167] In order to facilitate understanding of the invention, the following is a more detailed description in conjunction with the accompanying drawings and specific embodiments.
[0168] An embodiment proposes an electronic atomization device for atomizing a liquid substrate to generate an aerosol. In some embodiments, the electronic atomization device may comprise two or more separate or interchangeable parts that, when combined, form the complete and combined operational state of the electronic atomization device, and can generate an aerosol in response to operation by a user.
[0169] FIG. 3 shows a schematic diagram of an electronic atomization device according to an embodiment, wherein the electronic atomization device comprises: an atomizer 100 for atomizing a liquid substrate to generate an aerosol, and a power supply mechanism 200 for powering the atomizer 100.
[0170] According to FIG. 3, the power supply mechanism 200 comprises:
[0171] a proximal end 2110 and a distal end 2120 opposite the first end along the longitudinal direction; during use, the proximal end 2110 is the end for receiving the atomizer 100;
[0172] a receiving chamber 270 arranged adjacent to the proximal end 2110 and arranged along the longitudinal direction of the power supply mechanism 200; wherein, the receiving chamber 270 has an opening along the longitudinal direction or located towards the proximal end 2110; during use, the atomizer 100 may be received within the receiving chamber 270 or removed from the receiving chamber 270 through the opening;
[0173] a rechargeable battery core 210 for outputting power; wherein, the battery core 210 is arranged proximate to the distal end 2120;
[0174] a charging interface 240 for charging the rechargeable battery core 210; wherein, the charging interface 240 is arranged between the battery core 210 and the distal end 2120.
[0175] In one embodiment, the direct current supply voltage provided by the battery core 210 is in the range of about 2.5 V to about 9.0 V, and the amperage of the direct current that the battery core 210 is capable of providing is in the range of about 2.5 A to about 20 A.
[0176] According to FIG. 3, the power supply mechanism 200 further comprises:
[0177] a circuit 220 integrated or arranged on a circuit board, such as a PCB board, which is used to control the operation of the power supply mechanism 200. In particular, the circuit 220 controls the power output by the battery core 210. Also in FIG. 3, the circuit 220 is located between the battery core 210 and the receiving chamber 270.
[0178] According to FIG. 3, the power supply mechanism 200 further comprises:
[0179] an airflow sensor 250, such as a microphone / MEMS sensor, for sensing suction airflow passing through the atomizer 100 when the user aspirates from the atomizer 100; and the circuit 220 controls the battery core 210 to output power based on the sensing results of the airflow sensor 250. In the embodiment shown in FIG. 3, the airflow sensor 250 is arranged between the battery core 210 and the receiving chamber 270. Also, in yet some other variant embodiments, the airflow sensor 250 may also be assembled or secured or integrated on a circuit board of the arranged circuit 220. Alternatively, in yet some other variant embodiments, the airflow sensor 250 is supported and fixed within the power supply mechanism 200 by a separate support element, such as a plastic bracket.
[0180] In some embodiments, the power supply mechanism 200 induces the atomizer 100 to heat the atomization liquid substrate by generating a varying magnetic field that penetrates the receiving chamber 270; specifically, the atomizer 100 may be arranged with an induction heating element 50, such that when the atomizer 100 is received within the receiving chamber 270, it is capable of generating heat from being penetrated by the varying magnetic field, thereby heating the liquid substrate to generate an aerosol. Alternatively, in some embodiments, the power supply mechanism 200 supplies direct current to a resistive heating element in the atomizer 100 such that it heats the liquid substrate.
[0181] According to FIG. 3, the power supply mechanism 200 further comprises:
[0182] an induction coil 260 arranged around the receiving chamber 270;
[0183] the circuit 220, which may a capacitor and form an LC resonant circuit with the induction coil 260; in some optional embodiments, the LC resonant circuit may be a symmetrical half-bridge LC resonant circuit composed of two capacitors and the induction coil 260, or it may also be an asymmetrical half-bridge LC resonant circuit composed of only one capacitor in series with the induction coil 260. During operation, the circuit 220 drives the LC resonant circuit to oscillate at a predetermined frequency to form an alternating current flowing through the induction coil 260, thereby causing the induction coil 260 to generate a varying magnetic field capable of penetrating the receiving chamber 270. In some embodiments, the frequency of the alternating current supplied to the induction coil 260 by the circuit 220 ranges from 80 kHz to 2000 kHz; more specifically, this frequency can be within the range of approximately 600 kHz to 1,500 kHz.
[0184] In some embodiments, the induction coil 260 is wound from a low-resistance wire material; for example, copper wire, silver wire, etc. Also, in yet some other embodiments, the induction coil 260 is wound from Litz wire; Litz wire, with multiple strands or bundles of wire, is more favorable for carrying alternating current.
[0185] According to FIG. 3 and FIG. 4, the atomizer 100 comprises:
[0186] a first end 110 and a second end 120 opposite the first end along the longitudinal direction;
[0187] a housing extending between the first end 110 and the second end 120; wherein, the housing defines the exterior surface of the atomizer 100; specifically, the housing comprises:
[0188] a first housing 10 proximate to and defining the first end 110 and a second housing 20 proximate to and defining the second end 120. The first housing 10 and the second housing 20 are configured as hollow cylinders; the first housing 10 at least partially surrounds the second housing 20; and a flexible sealing element 30 is arranged between the first housing 10 and the second housing 20 to provide a seal between them. An air outlet 111 is defined at the first end 110 on the first housing 10, used for aspiration by the user.
[0189] Therein, the first housing 10 is provided with the following:
[0190] a first partition wall 11 extending longitudinally along the first housing 10; wherein, the first partition wall 11 and the first housing 10 are integrally molded, for example, molded from a polymer, ceramic, etc.; and the first partition wall 11 extends from the air outlet 111 away from the first end 110. Further, a first storage space 12 is defined between the first partition wall 11 and the first housing 10.
[0191] Therein, the second housing 20 is provided with the following:
[0192] a second partition wall 21 extending longitudinally along the second housing 20; and a second storage space 22 and a channel space 23 defined within the space of the housing 20 by the second partition wall 21 and located on both sides of the second partition wall 21. Further, after assembly, the first partition wall 11 and the second partition wall 21 are vertically aligned and joined; wherein, the first partition wall 11 and the second partition wall 21 are connected, and the joint gap between the first partition wall 11 and the second partition wall 21 is sealed by the sealing element 30.
[0193] After assembly, the first storage space 12 and the second storage space 22 are connected; specifically, a bypass hole 31 is arranged on the sealing element 30 to connect the first storage space 12 and the second storage space 22. Thereafter, upon assembly, the liquid storage chamber is collectively defined by the first storage space 12 and the second storage space 22 for storing the liquid substrate. Further, after assembly, the channel space 23 is connected to the hollow of the first partition wall 11, thereby forming, by the channel space 23 and the first partition wall 11, an airflow channel located between the air inlet 25 and the air outlet 111 to output an aerosol.
[0194] According to FIG. 4, the atomizer 100 further comprises:
[0195] an atomization assembly for atomizing a liquid substrate to generate an aerosol; wherein the atomization assembly comprises:
[0196] a liquid guiding element 40, and an induction heating element 50. The induction heating element 50 may be a separate part from the liquid guiding element 40, or may be integrated with the liquid guiding element 40.
[0197] In FIG. 3 and FIG. 4, the atomization assembly is mounted and retained on the second partition wall 21 of the second housing 20. Specifically, the second partition wall 21 may be a structure having a window or through-hole, while the atomization assembly is retained within the window or through-hole of the second partition wall 21.
[0198] In some embodiments, the liquid guiding element 40 comprises flexible fibers, such as cotton fibers, non-woven fabrics, fiberglass cords, etc., or comprises porous materials having a microporous configuration, for example, porous ceramics, porous glass, etc. The liquid guiding element 40 is capable of absorbing the liquid substrate from the liquid storage chamber. The induction heating element 50 is integrated with the liquid guiding element 40 for heating at least a portion of the liquid substrate within the liquid guiding element 40 to generate an aerosol.
[0199] According to FIG. 4 and FIG. 5, the liquid guiding element 40 is configured as a sheet extending longitudinally along the atomizer 100, with the liquid guiding element 40 comprising a liquid absorption surface 41 and an opposite atomizing surface 42; wherein, the liquid absorption surface 41 is bare and arranged facing the liquid storage chamber to draw the liquid substrate as shown by the arrow R1 in FIG. 3 and FIG. 4; and the induction heating element 50 is integrated with the atomizing surface 42.
[0200] In an embodiment, the induction heating element 50 is a sheet arranged longitudinally along the atomizer 100; wherein, the induction heating element 50 is a planar heating element. In some embodiments, the induction heating element 50 is prepared or formed by printing, or etching, in particular chemical etching, or stamping, or cutting, in particular laser cutting or water jet cutting, a sheet-like substrate made of a metal or alloy.
[0201] Alternatively, or in yet some other embodiments, the liquid guiding element 40 is a rigid porous body, for example, a porous ceramic, porous glass, etc., and the induction heating element 50 may be a coating formed on the atomizing surface 42 of the liquid guiding element 40 by deposition, printing, or spraying, etc.
[0202] Alternatively, in yet some other variant embodiments, the liquid guiding element 40 and / or the induction heating element 50 may also be configured to be arranged perpendicular to the longitudinal direction of the atomizer 100.
[0203] Alternatively, in yet some other variant embodiments, the liquid absorption surface 41 and / or the atomizing surface 42 of the liquid guiding element 40 is a curved surface, for example, a curved shape; accordingly, the induction heating element 50 may be a curved heating element.
[0204] The induction heating element 50 is made of a susceptor metal or alloy. For example, the induction heating element 50 may be made of SUS430 steel, or grade 430 stainless steel (SS430) , or it may be made of grade 420 stainless steel (SS420) , as well as alloys containing iron and nickel (such as Permalloy) .
[0205] In some optional embodiments, the liquid guiding element 40 has a length dimension of approximately 5 –15 mm, a width dimension of approximately 3 –8 mm, and a thickness dimension of approximately 0.5 –3 mm.
[0206] Correspondingly, the induction heating element 50 has a length dimension of approximately 5 –15 mm, a width dimension of approximately 2 –8 mm, and a thickness dimension of approximately 0.01 –0.5 mm. More preferably, the thickness of the induction heating element 50 is 0.02 –0.15 mm, and more preferably 0.06 –0.1 mm.Also, the length dimension of the induction heating element 50 is smaller than the length dimension of the induction coil 260; when the atomizer 100 is received within the receiving chamber 270, the induction heating element 50 is located within the induction coil 260 and does not extend beyond the induction coil 260. The induction heating element may 50 be centered in relation to a length of the induction coil 260 along the longitudinal direction, when the atomizer 100 is received in the receiving chamber 270. Alternatively, the induction heating element 50 may be offset from a center of the induction coil 260 along the longitudinal direction.
[0207] In some embodiments, the induction heating element 50 has a mass of approximately 1 –30 mg; more preferably, the mass of the induction heating element 50 is 2 –10 mg; the smaller the mass, the smaller the power required.
[0208] According to FIG. 5 and FIG. 6, the sheet-like induction heating element 50 comprises:
[0209] a first side 510 and a second side 520 opposite the first side along the width direction; and,
[0210] a plurality of notches 51 arranged on the first side 510 and / or the second 520; during use, the notches 51 define the path through which aerosol passes from the atomizing surface 42 through the induction heating element 50 and is released into the channel space 23; specifically, by arranging the notches 51 on both sides of the width of the induction heating element 50, the induction heating element 50 becomes fluid-permeable; as used herein, “fluid-permeable” means that aerosol in the gas phase can easily pass through the induction heating element 50 and be released into the airflow channel. Additionally, during aspiration, external air enters through the air inlet 25 and carries aerosol from the airflow channel to the air outlet 111 for aspiration by the user, as shown by the arrow R2 in FIG. 3 and FIG. 4. Also, the edges of the first side 510 and / or the second side 520 of the induction heating element 50 are serrated in shape due to the plurality of notches 51;
[0211] the plurality of notches 51 are arranged spaced apart in the longitudinal direction on the first side 510 or the second side 520, thereby defining tooth portions 52 located between two adjacent notches 51 on the first side 510 or the second side 520.
[0212] During assembly, the tooth portions 52 are clamped, thereby allowing the induction heating element 50 to be securely mounted and retained within the atomizer 100. Specifically, the atomization assembly may be mounted and secured by causing the tooth portions 52 to at least partially abut against the second partition wall 21. The tooth portions 52 may in particular be clamped between the second partition wall 21 and the liquid guiding element 40.
[0213] In the embodiment shown in FIG. 5 and FIG. 6, the notches 51 arranged on the first side 510 and the notches 51 arranged on the second side 520 are aligned in the width direction; and the notches 51 extend in the width direction of the induction heating element 50. A magnetic circuit portion 53 extending continuously along the longitudinal direction is thereby defined on the induction heating element 50; when the magnetic field generated by the induction coil 260 passes through, the induction heating element 50 has only one magnetic flux path defined by the magnetic circuit portion 53, as shown by the arrow R3 in FIG. 6, for example. Therefore, compared to conventional grid-shaped induction heating elements 1 / 1a in FIG. 1 or FIG. 2, the magnetic flux lines are more concentrated on the induction heating element 50. Consequently, the effective magnetic circuit area of the induction heating element 50 is significantly reduced, resulting in a higher current density and thus a faster heating rate at the same power level. At the same time, the tooth portions 52 generate less heat through eddy currents in the magnetic field, but are capable of conducting a large amount of heat from the magnetic circuit portion 53, which is beneficial to promoting heat dissipation on the induction heating element 50.
[0214] In the embodiment shown in FIG. 5 and FIG. 6, the magnetic circuit portion 53 extends in the longitudinal direction without bending or meandering, but instead extends continuously and straightly. Also, the magnetic circuit portion 53 extends from the first end to the second end along the longitudinal direction.
[0215] In the embodiment shown in FIG. 6, the extension dimension d1 of the notches 51 in the width direction of the induction heating element 50 is substantially equal to or slightly smaller than the width dimension d2 of the magnetic circuit portion 53. For example, in some embodiments, the width dimension d2 of the magnetic circuit portion 53 is between 1 / 4 and 1 / 2 of the width dimension of the induction heating element 50.
[0216] In some specific embodiments, using the atomizer 100 of the induction heating element 50 shown in FIG. 6, when the circuit 200 is set to a constant temperature mode according to the vaporization temperature of the liquid substrate, the energy consumed per puff (3 s) is 26 J. In contrast, compared with the atomizer 100 using the induction heating element 1a of the same length, width and thickness, as shown in FIG. 2, when the circuit 200 is set to a constant temperature mode according to the vaporization temperature of the liquid substrate, the energy consumed per puff (3 s) is 34 J. In addition, in a comparison test in the same mode, when using the atomizer 100 of the induction heating element 50 as shown in FIG. 6, each puff (3 s) by the user (3 s) has a TPM value (mass of particulate matter in mainstream smoke) of 6.8 mg; in the same test, using the atomizer 100 of the induction heating element 1a as shown in FIG. 2, each puff (3 s) by the user has a TPM value of 6.0 mg. Upon comparison, it is evident that the discharge rate of the battery core 210 has been reduced, and the atomization efficiency has been improved.
[0217] In some embodiments, the portion of the second housing 20 opposite the sheet-like induction heating element 50 may have a variety of shapes, such as circular, elliptical, or rectangular. For example, in a specific embodiment shown in FIG. 13, the cross-section of the second housing 20 has a shape similar to a racetrack or ellipse; the width direction of the induction heating element 50 located within the second housing 20 is perpendicular to the length of the cross-section of the second housing 20 or arranged parallel to the width of the cross-section of the second housing 20. In another example as shown in FIG. 14, the cross-section of the second housing 20 has a shape similar to a racetrack or ellipse; the width direction of the induction heating element 50 located within the second housing 20 is parallel to the length of the cross-section of the second housing 20, which is more advantageous in improving the utilization rate of mounting space and improving the utilization of the magnetic field by the induction heating element 50.
[0218] FIG. 7 shows a schematic diagram of an induction heating element 50a according to yet another variant embodiment, wherein the induction heating element 50a comprises:
[0219] a first side 510a and a second side 520a opposite the first side along the width direction; as shown in FIG. 7, the edge profile 55a of the first side 510a is curved in an arc. The edge profile 55a may be the concave arc shown in FIG. 7, or it may also be a convex arc. Alternatively, the width dimension of the induction heating element 50a is non-constant / variable in the longitudinal direction; specifically, the width dimension of the induction heating element 50a decreases along the direction proximate to the longitudinal center of the induction heating element 50a.
[0220] The induction heating element 50a is also arranged with a plurality of notches 51a located on the first side 510a and / or the second side 520a; and a tooth portion 52a is formed and defined between two adjacent notches 51a, thereby causing the edges of the first side 510a and / or the second side 520a of the induction heating element 50a to have a serrated shape.
[0221] According to FIG. 7, the induction heating element 50a also defines a magnetic circuit portion 53a extending straight along the longitudinal direction for defining a path R3 of relatively more concentrated magnetic flux lines to improve heating efficiency.
[0222] In the embodiment shown in FIG. 7, the induction heating element 50a is further provided with the following:
[0223] at least one or a plurality of first extension portions 541a extending from the magnetic circuit portion 53a toward the first end and terminating at the first end; and
[0224] at least one or a plurality of second extension portions 542a extending from the magnetic circuit portion 53a toward the second end and terminating at the second end. During assembly, the induction heating element 50 is securely mounted or retained within the atomizer 100 through the combination or clamping of the first extension portions 541a and the second extension portions 542a by the atomizer 100 and / or the second partition wall 21. The first extension portions 541a and the second extension portions 542a may in particular be clamped between the second partition wall 21 and the liquid guiding element 40.
[0225] In FIG. 7, the plurality of first extension portions 541a may be arranged spaced apart or discretely; accordingly, the plurality of second portions 542a may be arranged spaced apart or discretely.
[0226] FIG. 8 shows a schematic diagram of an induction heating element 50b according to yet another variant embodiment, wherein the induction heating element 50a comprises:
[0227] a first side 510b and a second side 520b opposite the first side along the width direction; and,
[0228] notches 51 b arranged on the first side 510b and / or the second side 520b for the aerosol to pass through and be released; in FIG. 8, the notches 51 b are arranged extending in the longitudinal direction;
[0229] a magnetic circuit portion 53b, arranged extending straight and continuously in the longitudinal direction;
[0230] at least one or a plurality of first extension portions 541 b extending from the magnetic circuit portion 53b toward the first end and terminating at the first end; and
[0231] at least one or a plurality of second extension portions 542b extending from the magnetic circuit portion 53b toward the second end and terminating at the second end.
[0232] FIG. 9 shows a schematic diagram of an induction heating element 50c according to yet another variant embodiment, wherein the induction heating element 50c comprises:
[0233] a first side 510c and a second side 520c opposite the first side along the width direction; and,
[0234] a plurality of notches 51c arranged on the first side 510c and / or the second sides 520c; wherein, the edges of the first side 510c and / or the second side 520c of the induction heating element 50c are serrated by a plurality of notches 51c; the plurality of notches 51c are arranged spaced apart along the longitudinal direction on the first side 510c or the second side 520c, thereby defining tooth portions 52c between two adjacent notches 51c on the first side 510c or the second side 520c;
[0235] a first magnetic circuit portion 531c and a second magnetic circuit portion 532c defined and separated by a longitudinally extending through-hole 56c, located on both sides of the through-hole 56c. Along the longitudinal direction of the induction heating element 50c, the extension length of the through-hole 56c is greater than 1 / 2 of the length of the induction heating element 50c.
[0236] Alternatively, in some other embodiments, no more than two magnetic path portions are defined along the longitudinal direction of the induction heating element 50c, which is advantageous for increasing the concentration of magnetic flux lines.
[0237] By arranging notches 51c on both sides of the width of the induction heating element 50c, and / or the longitudinally extending through-hole 56c, the induction heating element 50c becomes fluid-permeable; as used herein, “fluid-permeable” means that aerosol in the gas phase can easily pass through the induction heating element 50c and be released into the airflow channel.
[0238] Alternatively, FIG. 10 shows a schematic diagram of an induction heating element 50d according to yet another variant embodiment, wherein the induction heating element 50d comprises:
[0239] a first side 510d and a second side 520d opposite the first side along the width direction; and,
[0240] a plurality of first notches 511d arranged on a first side 510d, a number of second notches 512d arranged on a second side 520d; wherein, the plurality of first notches 511d make the edge of the first side 510d serrated, and the plurality of second notches 512d make the edge of the second side 520d serrated;
[0241] the plurality of first notches 511d are arranged spaced apart in the longitudinal direction, and the plurality of second notches 512d are arranged spaced apart in the longitudinal direction;
[0242] a plurality of tooth portions 52d, defined between two adjacent first notches 511d or between two second gaps 512d;
[0243] a magnetic circuit portion 53d, located between the first notches 511d and the second notches 512d, and extending straight and continuously along the longitudinal direction.
[0244] In the embodiment of FIG. 10, in the width direction of the induction heating element 50d, the first notches 511d and the second notches 512d are arranged staggered.
[0245] Alternatively, FIG. 11 shows a schematic diagram of an induction heating element 50e according to yet another variant embodiment, wherein the induction heating element 50e comprises:
[0246] a first side 510e and a second side 520e opposite the first side along the width direction;
[0247] a plurality of through-holes 51e arranged spaced apart along the longitudinal direction; wherein, the through-holes 51e avoid the first side 510e and the second side 520e; there is a gap between the through-holes 51e and the first side 510e, as well as a gap between the through-holes 51e and the second side 520e;
[0248] a first magnetic circuit portion 531e defined between the through-holes 51e and the first side 510e; and a second magnetic circuit portion 532e defined between the through-holes 51e and the second side 520e; defining, during use, they define the path through which the magnetic flux lines pass.
[0249] In the embodiment of FIG. 11, a path for the aerosol to be released into the airflow channel after passing through the induction heating element 50e is provided by the through-holes 51e.
[0250] Alternatively, FIG. 12 shows a schematic diagram of an induction heating element 50f according to yet another variant embodiment, wherein the induction heating element 50f comprises:
[0251] a first side 510f and a second side 520f opposite the first side along the width direction;
[0252] a main body portion 53f arranged extending along the longitudinal direction;
[0253] at least one or a plurality of first extension portions 541f extending from the main body portion 53f toward the first end and terminating at the first end; and
[0254] at least one or a plurality of second extension portions 542f extending from the main body portion 53f toward the second end and terminating at the second end. During assembly, the induction heating element 50f may be secured by at least clamping or retaining the first extension portions 541f and / or the second extension portions 542f.
[0255] In FIG. 12, the first extension portions 541f and the second extension portions 542f have an arc or are curved in an arc shape.
[0256] In FIG. 12, the width of the main body portion 53f in the longitudinal direction is variable; for example, in the specific embodiment in FIG. 12, the main body portion 53f comprises a first section 5310f, a second section 5320f, and a third section 5330f arranged sequentially along the longitudinal direction; wherein, the width W2 of the second section 5320f is smaller than the width W1 of the first section 5310f and / or the width W3 of the third section 5330f, such that the main body portion 53f is of a shape that is narrow in the middle and wide at both ends.
[0257] As shown in FIG. 12, the main body portion 53f has a serrated shape on both the first side 510f and the second side 520f in the width direction; for example, the main body portion 53f is arranged with a plurality of notches 51f on both the first side 510f and the second side 520f in the width direction for releasing the aerosol, and a plurality of tooth portions 52f are defined along the longitudinal direction between adjacent notches 51f.
[0258] The plurality of tooth portions 52f may comprise a first tooth portion extending toward the first side 510f and a second tooth portion extending toward the second side 520f. Also, in some embodiments, the plurality of tooth portions 52f may have the same length or different lengths. For example, in FIG. 12, the length of the tooth portions 52f extending from the second section 5320f is greater than the length of the tooth portions 52f extending from the first section 5310f and / or the third section 5330f. During assembly, the induction heating element 50f may be secured by at least clamping or retaining the tooth portions 52f extending from the second section 5320f.
[0259] As shown in FIG. 12, the length and maximum width of the induction heating element 50f in this embodiment defines an approximately rectangular virtual profile F; and in this embodiment, this virtual profile F is essentially similar in shape to the window of through-hole in the second partition wall 21 in FIG. 4; thereby ensuring a stable fit and retention when clamped, held, or integrated with the induction heating element 50f through the second partition wall 21 due to their matching dimensions.
[0260] Alternatively, the length and maximum width of the induction heating element 50f of this embodiment defines an approximately rectangular virtual profile F, which is similar or close to the shape or profile of the atomizing surface 42 of the liquid guiding element 40.
[0261] FIG. 15 shows a schematic diagram of an induction heating element 50g according to yet another variant embodiment, wherein the induction heating element 50g comprises a first side 510g and a second side 520g opposite the first side along the width direction.
[0262] The induction heating element 50g has a plurality of notches 51g located on the first side 510g and the second side 520g. Tooth portions 52g extend from a rectangular main body portion 550g of the induction heating element 50g along a width direction. The notches 51g are defined between adjacent tooth portions 52g, thereby causing the edges of the first side 510g and the second side 520g of the induction heating element 50g to have a serrated shape.
[0263] According to FIG. 15, the induction heating element 50g defines three magnetic circuit portions 53g extending straight along the longitudinal direction, each defining a path R3 of relatively more concentrated magnetic flux lines to improve heating efficiency.
[0264] The induction heating element 50g extends along the longitudinal direction from a first end 570g to a second end 580g.
[0265] The induction heating element 50g comprises a first extension portion 541g extending from the main body portion 550g and the magnetic circuit portions 53g toward the first end 570g and terminating at the first end 570g. One or more additional first extension portions 541g extending from the main body portion 550g and the magnetic circuit portions 53g toward the first end 570g could be additionally provided.
[0266] The induction heating element 50g further comprises a second extension portion 542g extending from the main body portion 550g and the magnetic circuit portions 53g toward the second end 580g and terminating at the second end 580g. One or more additional second extension portions 542g extending from the main body portion 550g and the magnetic circuit portions 53g toward the second end 580g could be additionally provided.
[0267] The induction heating element 50g is mounted or retained within the atomizer 100 by clamping of the tooth portions 52g, the first extension portion 541g and the second extension portion 542g between the liquid guiding element 40 and the second partition wall 21.
[0268] The main body portion 550g of the induction heating element 50g of FIG. 15 is formed as a mesh. In the illustrated embodiment, the mesh has two longitudinally extending columns of through-holes 590g. Preferably, the through-holes 590g have rectangular or square shapes or cross-sections.
[0269] The first magnetic circuit portions 531g longitudinally extend between lateral edges of the main body portion 550g and the column of through-holes 590g located next to the respective edge, or between the columns of through-holes 590g.
[0270] It should be noted that the specification and accompanying drawings in the present application provide preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Furthermore, those of ordinary skill in the art can make improvements or variations based on the above specification, and all such improvements and variations should fall within the scope of protection of the appended claims of the present application.
Claims
1.An atomizer, comprising:a liquid storage chamber for storing a liquid substrate; andan induction heating element that is capable of heating the liquid substrate to generate an aerosol by being penetrated by a varying magnetic field;wherein the induction heating element comprises at least one notch such that the induction heating element is fluid-permeable; andwherein the induction heating element defines at least one and / or no more than two magnetic circuit portions that extend in a longitudinal direction, providing at least one and / or no more than two magnetic flux paths through the induction heating element.2.The atomizer according to Claim 1, wherein the induction heating element is a planar heating element.3.The atomizer according to Claim 1 or 2, wherein the magnetic circuit portions are arranged extending in a continuous and uninterrupted manner in the longitudinal direction of the induction heating element.4.The atomizer according to any one of the preceding Claims, wherein the magnetic circuit portions extend in a straight manner in the longitudinal direction of the induction heating element.5.The atomizer according to any one of the preceding Claims, wherein the induction heating element has a mass of 1 mg to 30 mg.6.The atomizer according to any one of the preceding Claims, further comprising a liquid guiding element, wherein the liquid guiding element includes a liquid absorption surface and an atomizing surface, wherein the liquid absorption surface is in fluid communication with the liquid storage chamber for absorbing the liquid substrate.7.The atomizer according to claim 6, wherein the induction heating element is provided on the atomizing surface or is bonded to the atomizing surface.8.The atomizer according to any one of the preceding Claims, wherein the induction heating element comprises a first side and a second side opposite the first side along a width direction; andwherein the notch comprises one or a plurality of first notches arranged on the first side and / or one or a plurality of second notches arranged on the second side.9.The atomizer according to Claim 8, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that the first side has a serrated shape; and / orthe plurality of second notches are arranged spaced apart along the longitudinal direction such that the second side has a serrated shape.10.The atomizer according to Claim 8 or 9, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that a plurality of first tooth portions are defined between adjacent first notches; and / orthe plurality of second notches are arranged spaced apart along the longitudinal direction such that a plurality of second tooth portions are defined between adjacent second notches.11.The atomizer according to Claim 10, wherein the atomizer retains the induction heating element in place through at least one of the first tooth portions and / or at least one of the second tooth portions.12.The atomizer according to any one of Claims 8 to 11, wherein the one or plurality of first notches are located between the magnetic circuit portions and the first side; and / orthe one or plurality of second notches are located between the magnetic circuit portions and the second side.13.The atomizer according to any one of the preceding Claims, wherein a width dimension of the induction heating element varies along the longitudinal direction.14.The atomizer according to any one of the preceding Claims, wherein the induction heating element comprises a first end and a second end opposite the first end along the longitudinal direction, and wherein:at least one first extension portion extends from a main body portion of the induction heating element and / or from the magnetic circuit portions toward the first end and terminates at the first end; and / orat least one second extension portion extends from a main body portion of the induction heating element and / or from the magnetic circuit portions toward the second end and terminates at the second end.15.The atomizer according to claim 14, wherein the atomizer retains the induction heating element through the at least one first extension portion and / or through the at least one second extension portion.16.The atomizer according to any one of the preceding Claims, wherein the induction heating element or a main body portion of the induction heating element has a generally rectangular shape.17.The atomizer according to any one of the preceding Claims, wherein the induction heating element or a main body portion of the induction heating element comprises perforations or through-holes.18.The atomizer according to any one of the preceding Claims, wherein the induction heating element or a main body portion of the induction heating element is formed as a mesh.19.An atomizer, comprising:a liquid storage chamber for storing a liquid substrate;a liquid guiding element fluidly connected to the liquid storage chamber for absorbing the liquid substrate; andan induction heating element provided on the liquid guiding element and capable of heating the liquid substrate to generate an aerosol by being penetrated by a varying magnetic field;wherein the induction heating element has a first end and a second end opposite the first end along a longitudinal direction, and wherein the induction heating element comprises:a main body portion extending along the longitudinal direction;at least one first extension portion extending from the main body portion toward the first end and terminating at the first end;at least one second extension portion extending from the main body portion toward the second end and terminating at the second end.20.The atomizer according to Claim 19, wherein the atomizer is configured to retain the induction heating element by the first extension portions and / or the second extension portions.21.The atomizer according to Claim 19 or 20, wherein a transverse width of the main body portion varies along the longitudinal direction.22.The atomizer according to any one of Claims 19 to 21, wherein the main body portion comprises a first section, a second section and a third section arranged in sequence along the longitudinal direction, wherein a width of the second section is less than a width of the first section and a width of the third section.23.The atomizer according to any one of Claims 19 to 22, wherein the induction heating element further comprises:a first side and a second side opposite the first side along a width direction;one or a plurality of first notches are arranged on the first side; and / orone or a plurality of second notches are arranged on the second side.24.The atomizer according to Claim 23, wherein the plurality of first notches are arranged spaced apart along the longitudinal direction such that the first side has a serrated shape; and / orthe plurality of second notches are arranged spaced apart along the longitudinal direction such that the second side has a serrated shape.25.The atomizer according to any one of Claims 19 to 24, wherein the main body portion of the induction heating element has a rectangular shape.26.The atomizer according to any one of Claims 19 to 25, wherein the main body portion of the induction heating element is formed as a mesh.27.The atomizer according to any one of Claims 19 to 26, wherein the main body portion of the induction heating element comprises perforations or through holes.28.An electronic atomization device, comprising:the atomizer according to any one of the preceding Claims; anda power supply mechanism comprising:a receiving chamber having an opening, wherein during use, at least a portion of the atomizer is removably received in the receiving chamber through the opening; andan induction coil arranged around the receiving chamber to generate a varying magnetic field, wherein when the atomizer is received in the receiving chamber, the induction heating element is configured to be heated by the varying magnetic field generated by the induction coil.29.The electronic atomization device according to claim 28, wherein the opening of the receiving chamber opens along the longitudinal direction, and wherein the induction heating element is centered in relation to a length of the induction coil along the longitudinal direction, when the atomizer is received in the receiving chamber.30.Method for manufacturing an induction heating element for an atomizer, comprising:providing an induction heating material that is capable of generating heat by being penetrated by a varying magnetic field; andforming an induction heating element having notches rendering the induction heating element fluid-permeable from the induction heating material.31.Method according to claim 30, wherein forming the induction heating element comprises printing, or stamping, or etching, in particular chemical etching, or cutting, in particular laser cutting or water jet cutting.