Aerosol generating device and heater for aerosol generating device

Abstract

The utility model provides an aerosol generating device and a heater for the aerosol generating device. Wherein the aerosol generating device comprises: a chamber for receiving an aerosol generating article; a heating element at least partially surrounding or defining the chamber and for heating the aerosol-generating article; the first spiral electrode and the second spiral electrode surround and are combined with the heating element and are used for guiding current on the heating element; the first spiral electrode and the second spiral electrode are configured to be in a spiral shape extending in the longitudinal direction of the heating element, and windings of the first spiral electrode and windings of the second spiral electrode alternate in the longitudinal direction of the heating element; the distance between the winding of the adjacent first spiral electrode and the winding of the adjacent second spiral electrode is variable or non-constant in the longitudinal direction of the heating element. According to the aerial fog generating device, different parts of the heating element have different temperature fields in the working process through the variable spacing between the spiral electrodes.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat-not-burn aerosol generation, and in particular to an aerosol generating device and a heater for the aerosol generating device. Background Art

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

[0003] An example of such a product is a heating device that releases compounds by heating rather than burning a material. For example, the material may be an aerosol-generating product of tobacco or other non-tobacco products, which may or may not contain nicotine. Known heating devices, in order to heat the aerosol-generating product to a temperature capable of releasing volatile components that can form an aerosol, usually surround the aerosol-generating product with a tubular substrate, and form or arrange a resistive or infrared heating coating on the outside of the tubular substrate, and generate an aerosol by heating the aerosol-generating product in the tubular substrate by resistive Joule heat or infrared radiation. Utility Model Content

[0004] One embodiment of the present application provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

[0005] a chamber for receiving the aerosol generating article;

[0006] a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article;

[0007] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0008] The spacing between adjacent windings of the first spiral electrode and the second spiral electrode varies or is non-constant in the longitudinal direction of the heating element.

[0009] In some embodiments, the heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode;

[0010] When current is directed across the heating element via the first and second spiral electrodes, the exposed area heats up via resistive Joule heating.

[0011] In some embodiments, the exposed area is in a continuous spiral shape; and the width of the exposed area varies in the longitudinal direction of the heating element.

[0012] In some embodiments, the width of the exposed area is between 0.2 mm and 4 mm.

[0013] In some embodiments, the first spiral electrode and / or the second spiral electrode are arranged around the entire circumference of the heating element;

[0014] and / or, the first spiral electrode and the second spiral electrode are arranged around the same portion of the heating element;

[0015] And / or, the first helical electrode and the second helical electrode have substantially the same length.

[0016] In some embodiments, the heating element has a first end and a second end opposite to each other in a longitudinal direction, and the first spiral electrode and the second spiral electrode spirally extend from the first end to the second end.

[0017] In some embodiments, the spacing between adjacent windings of the first spiral electrode and the windings of the second spiral electrode gradually increases in a direction approaching the second end.

[0018] In some embodiments, the chamber has an opening through which the aerosol-generating article can be removably received in the chamber in use;

[0019] The first end is arranged close to or toward the opening.

[0020] In some embodiments, the first helical electrode has a first pitch and the second helical electrode has a second pitch; the first pitch is different from the second pitch, thereby forming a varying spacing between adjacent windings of the first helical electrode and the second helical electrode.

[0021] In some embodiments, at least one of the first helical electrode and the second helical electrode has a varying pitch, thereby forming a varying spacing between adjacent windings of the first helical electrode and the windings of the second helical electrode.

[0022] In some embodiments, the heating element includes a first portion, a second portion, and a third portion that are arranged continuously in the longitudinal direction;

[0023] When current is directed through the first and second spiral electrodes on the heating element, the first portion operates at a greater power or temperature than the second portion, and the second portion operates at a greater power or temperature than the third portion.

[0024] Another embodiment of the present application further provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

[0025] a chamber for receiving the aerosol generating article;

[0026] a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article;

[0027] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0028] The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is in a continuous spiral shape; the width of the exposed area is variable or non-constant in the longitudinal direction of the heating element.

[0029] Another embodiment of the present application further provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

[0030] a chamber for receiving the aerosol generating article;

[0031] a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article;

[0032] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0033] The first spiral electrode has a first pitch, and the second spiral electrode has a second pitch; the first pitch is different from the second pitch.

[0034] Another embodiment of the present application further provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

[0035] a chamber for receiving the aerosol generating article;

[0036] a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article;

[0037] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and combined with the heating element for guiding current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirally shaped extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the second spiral electrode are alternated in the longitudinal direction of the heating element; at least one of the first spiral electrode and the second spiral electrode has a varying pitch.

[0038] Another embodiment of the present application further provides a heater for an aerosol generating device, comprising:

[0039] A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction;

[0040] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0041] The spacing between adjacent windings of the first spiral electrode and the second spiral electrode varies or is non-constant in the longitudinal direction of the heating element.

[0042] Another embodiment of the present application further provides a heater for an aerosol generating device, comprising:

[0043] A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction;

[0044] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0045] The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is in a continuous spiral shape; the width of the exposed area is variable or non-constant in the longitudinal direction of the heating element.

[0046] Another embodiment of the present application further provides a heater for an aerosol generating device, comprising:

[0047] A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction;

[0048] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0049] The first spiral electrode has a first pitch, and the second spiral electrode has a second pitch; the first pitch is different from the second pitch.

[0050] Another embodiment of the present application further provides a heater for an aerosol generating device, comprising:

[0051] A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction;

[0052] A first spiral electrode and a second spiral electrode are spaced apart, surrounding and combined with the heating element for guiding current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirally shaped extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the second spiral electrode are alternated in the longitudinal direction of the heating element; at least one of the first spiral electrode and the second spiral electrode has a varying pitch.

[0053] The above aerosol generating device, by varying the spacing between the spiral electrodes, enables different parts of the heating element to have different temperature fields during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0055] Figure 1 is a schematic diagram of an aerosol generating device provided by an embodiment;

[0056] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of a middle heater;

[0057] Figure 3 yes Figure 2 An exploded schematic diagram of a view of the central heater;

[0058] Figure 4 It is a structural schematic diagram of a heater of another embodiment from one perspective. DETAILED DESCRIPTION

[0059] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] One embodiment of the present application provides an aerosol generating device 100 that heats, rather than burns, an aerosol generating product 1000, such as a cigarette, so that at least one component of the aerosol generating product 1000 is volatilized or released to form an aerosol for inhalation, for example Figure 1 shown.

[0061] In an optional embodiment, the aerosol generating article 1000 preferably uses a tobacco-containing material that releases volatile compounds from the substrate when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 1000 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0062] according to Figure 1 As shown, when the aerosol generating article 1000 is received in the aerosol generating device 100, a portion thereof is exposed outside the aerosol generating device 100, such as a filter tip, which is advantageous for a user to inhale.

[0063] The structure of the aerosol generating device 100 according to one embodiment of the present application can be seen in Figure 1 As shown, the overall appearance of the device is generally constructed in a longitudinal shape, and the aerosol generating device 100 includes:

[0064] a chamber having an opening 40; in use, an aerosol-generating article 1000 can be removably received in the chamber through the opening 40 of the chamber;

[0065] A heater 30 is arranged at least partially around or bounding the chamber; when the aerosol generating article 1000 is received in the chamber, the heater 30 surrounds the aerosol generating article 1000 from the outside and heats the aerosol generating article 1000, so that the aerosol generating article 1000 releases a plurality of volatile compounds, and these volatile compounds are formed only by the heating process;

[0066] A battery cell 10 for supplying power; more preferably, the battery cell 10 is a rechargeable DC battery cell 10 and can be charged by connecting to an external power source;

[0067] The circuit board 20 , such as a PCB board or an FPC board, is provided with a circuit for conducting current between the battery cell 10 and the heater 30 .

[0068] exist Figure 1In the illustrated embodiment, the heater 30 is arranged to be tubular in shape, and a chamber for receiving the aerosol-generating article 1000 is formed or defined by at least a portion of the tubular hollowness of the heater 30. When the aerosol-generating article 1000 is received in the chamber, the heater 30 at least partially surrounds or encloses the aerosol-generating article 1000 and heats the aerosol-generating article 1000 from the periphery thereof. Furthermore, when the aerosol-generating article 1000 is received in the chamber, it is at least partially contained and retained within the heater 30.

[0069] Figures 2 to 3 A schematic diagram of a heater 30 according to one embodiment is shown,

[0070] a tubular substrate 31; in use, a chamber for accommodating and holding the aerosol generating article 1000 is at least partially defined by the inner hollow of the substrate 31; and,

[0071] The heating element 32 is formed or arranged on the substrate 31; in some embodiments, the heating element 32 is formed on the outer surface of the substrate 31 by deposition, spraying, printing or wrapping. Or in some other embodiments, the heating element 32 is formed on the inner surface of the substrate 31.

[0072] In some embodiments, the circumferential length or circumference of the substrate 31 is greater than the length of the substrate 31 along the longitudinal direction. In some embodiments, the longitudinal length of the substrate 31 does not exceed 15 mm or is less than 15 mm. In some embodiments, the substrate 31 may have a longitudinal length of about 10 mm to 15 mm and an inner diameter of about 5.8 mm to 10 mm. In some specific embodiments, the substrate 31 may have a longitudinal length of 12 mm; the substrate 31 may have an inner diameter of 7.6 mm.

[0073] In some embodiments, the heating element 32 is closed in the circumferential direction of the heater 30; the heating element 32 is a closed ring. In some embodiments, the length of the heating element 32 is 8 to 12 mm.

[0074] In some embodiments, the heating element 32 is a coating or thin layer formed on the substrate 31 by deposition, spraying, printing, etc. Or in some other embodiments, the heating element 32 is a film wrapped or bonded to the substrate 31. Or in some other optional embodiments, the resistive heating element 32 can also be a resistive heating film wound or bonded to the substrate 31.

[0075] In some embodiments, the thickness of the heating element 32 in the form of a resistive coating can preferably be controlled to be 10 μm to 300 μm; and the heating element 32 can be formed on the surface of the tubular substrate 31 by spraying it on the outer surface of the tubular substrate 31 through atmospheric plasma spraying and then curing it.

[0076] In some embodiments, the heating element 32 is a resistive heating element; by directing an electric current through the heating element 32, the heating element 32 can be heated by resistive Joule heating, thereby heating the aerosol generating article 1000. Also, in some embodiments, the heating element 32 used for heating by generating resistive Joule heating can include graphite or a resistive metal or alloy; wherein the metal or alloy is, for example, nickel-chromium alloy, nickel-iron alloy, platinum, tungsten, silver, aluminum, titanium, molybdenum, manganese, or alloys containing them.

[0077] When the heating element 32 is applied to the above heating element 32 heated by resistive heating, the material of the substrate 31 is a material with good thermal conductivity, such as ceramic, glass, surface insulating metal or alloy such as anodized aluminum, aluminum alloy, copper alloy, stainless steel, etc. And in some embodiments, the thermal conductivity of the substrate 31 is at least 10W / mk, preferably or at least 100W / mk; or in some embodiments, the thermal conductivity of the substrate 31 is greater than 200W / mk or higher. In some embodiments, the substrate 31 includes a metal suitable for the above high thermal conductivity such as aluminum, copper, titanium, or an alloy containing at least one of them. In some embodiments, the wall thickness of the substrate 31 is between 0.1 and 0.5 mm; more specifically, for example, the wall thickness of the substrate 31 is between 0.15 and 0.2 mm.

[0078] In some other embodiments, the heating element 32 is an infrared emitting layer, such as an electrically induced infrared emitting layer; by providing a DC voltage to the heating element 32, the heating element 32 can be driven by the voltage to radiate infrared rays, thereby heating the aerosol generating product 1000. When the heating element 32 used for heating by radiating infrared rays is applied, the material of the substrate 31 is a material that is infrared-transmissive, such as quartz, glass, ceramic, etc. In some embodiments, the heating element 32 for radiating infrared rays can be a coating made of ceramic materials such as zirconium, Fe-Mn-Cu system, tungsten system, or transition metals and their oxide materials. For example, in some embodiments, the heating element 32 for radiating infrared rays is composed of oxides of at least one metal element such as Mg, Al, Ti, Zr, Mn, Fe, Co, Ni, Cu, Cr, Zn, etc., and these metal oxides can radiate infrared rays with heating effect when heated to an appropriate heating temperature.

[0079] according to Figures 2 to 3 In the embodiment shown, the base body 31 comprises:

[0080] The first end 311 and the second end 312 are opposite to each other in the longitudinal direction; in the embodiment, the first end 311 and the second end 312 in the length direction of the substrate 31 respectively define two ends of the heater 30; and the inner hollow of the substrate 31 at least defines a chamber for receiving the aerosol generating article 1000; wherein the first end 311 is arranged closer to or toward the opening 40;

[0081] The heating element 32 is arranged to extend between a first end 311 and a second end 312 .

[0082] according to Figures 2 to 3 As shown, the heater 30 also includes:

[0083] The first spiral electrode 33 and the second spiral electrode 34 are used to guide the current on the heating element 32. In some embodiments, the first spiral electrode 33 and the second spiral electrode 34 are electrode coatings formed by spraying, printing, deposition and other processes with low resistivity electrode materials. In some optional embodiments, the first spiral electrode 33 and the second spiral electrode 34 are made of low resistivity gold, silver, copper or their alloys. Or in some other variant embodiments, the first spiral electrode 33 and the second spiral electrode 34 can also be replaced with a thinner sheet structure, which is formed outside the substrate 31 by welding or close contact.

[0084] During use, the first spiral electrode 33 and the second spiral electrode 34 are respectively connected to the circuit board 20 by welding conductive leads, so that the circuit board 20 can operably connect one of the first spiral electrode 33 and the second spiral electrode 34 to the positive pole of the battery cell 10 and the other to the negative pole of the battery cell 10, and then power is supplied to the heating element 32 through the first spiral electrode 33 and the second spiral electrode 34.

[0085] according to Figure 2 and Figure 3 As shown, the first spiral electrode 33 and / or the second spiral electrode 34 cover or are combined on the surface of the heating element 32. Figure 2 and Figure 3 As shown, the first spiral electrode 33 and / or the second spiral electrode 34 are configured to be spirally shaped extending in the longitudinal direction of the heater 30. The first spiral electrode 33 and / or the second spiral electrode 34 are arranged around the heating element 32. Alternatively, the first spiral electrode 33 and / or the second spiral electrode 34 are arranged around the entire circumference of the heating element 32.

[0086] In an embodiment, the first spiral electrode 33 and / or the second spiral electrode 34 extend from the first end 311 to the second end 312. Alternatively, the first spiral electrode 33 and / or the second spiral electrode 34 have substantially the same length and are disposed around the same portion of the heating element 32 in the longitudinal direction of the heating element 32 / heater 30, rather than the first spiral electrode 33 and the second spiral electrode 34 being disposed around different portions of the heating element 32 in the longitudinal direction.

[0087] In an embodiment, the first spiral electrode 33 and the second spiral electrode 34 are wound around each other to form a double spiral structure. In an embodiment, the windings of the first spiral electrode 33 and the windings of the second spiral electrode 34 are alternated in the longitudinal direction of the heating element 32 / heater 30.

[0088] according to Figure 2 and Figure 3 In the embodiment shown, part of the heating element 32 is covered by the first spiral electrode 33 and the second spiral electrode 34; and the heating element 32 also has an exposed area between the first spiral electrode 33 and the second spiral electrode 34. In use, by connecting the first spiral electrode 33 and the second spiral electrode 34 to the positive and negative electrodes of the battery cell 10 respectively, current can be guided on the exposed area of ​​the heating element 32 so that the exposed area of ​​the heating element 32 generates resistance Joule heat and heats up, and then transfers to other parts of the heating element 32 to heat up as a whole, and finally the aerosol generating product is heated by the heating element 32. In the embodiment, the exposed area is a continuous spiral. In the embodiment, since the exposed area of ​​the heating element 32 has a small area, when the current is guided on the heating element 32 through the first spiral electrode 33 and the second spiral electrode 34 in use, the resistance value of the heating element 32 can be reduced to about 0.5Ω, which significantly improves the working power of the heating element 32.

[0089] according to Figure 2 and Figure 3 In the embodiment shown, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 varies or is non-constant in the longitudinal direction of the heater 30. Alternatively, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 varies in the longitudinal direction of the heater 30. Accordingly, the width of the exposed area of ​​the heating element 32 also varies in the longitudinal direction.

[0090] Specifically in Figure 2 and Figure 3 As shown in , the spacing between the windings of the adjacent first spiral electrodes 33 and the windings of the second spiral electrodes 34 gradually increases in the direction close to the second end 312. Figure 2, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 has different first dimensions d31, second dimensions d32, and third dimensions d33 at three different positions in the longitudinal direction of the heater 30; the first dimension d31 is smaller than the second dimension d32, and the second dimension d32 is smaller than the third dimension d33. The position where the spacing has the first dimension d31 is closest to the first end 311; the position where the spacing has the third dimension d33 is closest to the second end 312.

[0091] Or correspondingly, the exposed area of ​​the heating element 32 has different first width dimensions d31, second width dimensions d32 and third width dimensions d33 at three different positions in the longitudinal direction; the first width dimension d31 is smaller than the second width dimension d32, and the second width dimension d32 is smaller than the third width dimension d33.

[0092] In some embodiments, the spacing between adjacent windings of the first spiral electrode 33 and the windings of the second spiral electrode 34 is between 0.2 and 4 mm. Accordingly, the width of the exposed area of ​​the heating element 32 is also between 0.2 and 4 mm.

[0093] In the heater 30 having the above arrangement of the first spiral electrode 33 and the second spiral electrode 34, the exposed area of ​​the heating element 32 has different current densities in the longitudinal direction during operation, thereby forming different operating powers and heating temperatures in the longitudinal direction of the heating element 32. Specifically, during operation, the operating power and heating temperature in the longitudinal direction of the heating element 32 gradually decrease along the direction close to the second end 312.

[0094] For example, Figure 3 As shown in the figure, the heating element 32 includes a first part 321, a second part 322 and a third part 323 which are arranged in sequence from the first end 311 to the second end 312 in the longitudinal direction; during operation, the power and / or temperature of the first part 321 is greater than the power and / or temperature of the second part 322, and the power and / or temperature of the second part 322 is greater than the power and / or temperature of the third part 323.

[0095] exist Figure 3 In the embodiment shown, the first spiral electrode 33 and the second spiral electrode 34 have different pitches, thereby forming a variable spacing between them. In some embodiments, for example, the first spiral electrode 33 has a first pitch, and the second spiral electrode 34 has a second pitch; the first pitch is different from the second pitch, thereby forming a variable spacing between them in the double spiral structure formed by them.

[0096] In some other embodiments, at least one of the first spiral electrode 33 and / or the second spiral electrode 34 has a variable pitch, thereby forming a variable spacing between them. The pitch or spiral pitch is a term in the field of physics and mathematics, and refers to the distance between two adjacent points of a spiral object in the axial direction. Or in some specific scenarios, the pitch or spiral pitch is the length of a complete winding of a spiral object in the axial direction.

[0097] In some embodiments, the first spiral electrode 33 is arranged spirally at a first pitch; the second spiral electrode 34 is arranged spirally at a second pitch. In some embodiments, the first pitch of the first spiral electrode 33 varies in the longitudinal direction; specifically, the first pitch of the first spiral electrode 33 gradually increases in the direction close to the second end 312. And similarly, the second pitch of the second spiral electrode 34 varies in the longitudinal direction; specifically, the second pitch of the second spiral electrode 34 gradually increases in the direction close to the second end 312. In an embodiment, the amount of change and / or the rate of change of the first pitch of the first spiral electrode 33 and the second pitch of the second spiral electrode 34 are different; for example, the amount of change and / or the rate of change of the first pitch of the first spiral electrode 33 is greater, so that the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 varies in the longitudinal direction of the heater 30.

[0098] In some other varied embodiments, the spacing between the windings of adjacent first spiral electrodes 33 and second spiral electrodes 34 varies more in the longitudinal direction of the heater 30, so that the first part 321, the second part 322 and the third part 323 of the heating element 32 have more different temperatures during operation.

[0099] For example, in some specific variations, the spacing between adjacent windings of the first spiral electrode 33 and the windings of the second spiral electrode 34 gradually decreases in the direction approaching the second end 312; so that during operation, the third portion 323 of the heating element 32 has a greater operating power and temperature than the first portion 321 and / or the second portion 322.

[0100] Another example Figure 4 A schematic diagram of a heater 30a of another variant embodiment is shown; in this embodiment, the spacing between the windings of the adjacent first spiral electrode 33a and the windings of the second spiral electrode 34a is arranged to gradually decrease from both ends to the middle. Figure 4In the embodiment, the distance between the first spiral electrode 33a and the second spiral electrode 34a has a first dimension d41 near the first end 311a / the second end 312a, and the distance between the first spiral electrode 33a and the second spiral electrode 34a has a second dimension d42 near the longitudinal center; the first dimension d41 is greater than the second dimension d42. In operation, the operating power and temperature of the second portion of the heating element 32a are greater than the operating power and temperature of the first portion and / or the third portion.

[0101] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol generating article; a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The spacing between adjacent windings of the first spiral electrode and the second spiral electrode varies or is non-constant in the longitudinal direction of the heating element.

2. The aerosol generating device according to claim 1, characterized in that The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode; When current is directed across the heating element via the first and second spiral electrodes, the exposed area heats up via resistive Joule heating.

3. The aerosol generating device according to claim 2, characterized in that The exposed area is in a continuous spiral shape; the width of the exposed area varies in the longitudinal direction of the heating element.

4. The aerosol generating device according to claim 3, characterized in that The width of the exposed area is between 0.2 and 4 mm.

5. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The first spiral electrode and / or the second spiral electrode are arranged around the entire circumference of the heating element; and / or, the first spiral electrode and the second spiral electrode are arranged around the same portion of the heating element; And / or, the first helical electrode and the second helical electrode have substantially the same length.

6. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The heating element has a first end and a second end opposite to each other in a longitudinal direction, and the first spiral electrode and the second spiral electrode spirally extend from the first end to the second end.

7. The aerosol generating device according to claim 6, characterized in that The spacing between adjacent windings of the first spiral electrode and the windings of the second spiral electrode gradually increases in a direction approaching the second end.

8. The aerosol generating device according to claim 6, characterized in that The chamber has an opening through which the aerosol-generating article can be removably received in the chamber in use; The first end is arranged close to or toward the opening.

9. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The first spiral electrode has a first pitch and the second spiral electrode has a second pitch; the first pitch is different from the second pitch, thereby forming a varying spacing between adjacent windings of the first spiral electrode and the second spiral electrode.

10. The aerosol generating device according to any one of claims 1 to 4, characterized in that: At least one of the first and second helical electrodes has a varying pitch, thereby forming a varying spacing between adjacent windings of the first and second helical electrodes.

11. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The heating element comprises a first portion, a second portion and a third portion which are arranged continuously in the longitudinal direction; When current is directed through the first and second spiral electrodes on the heating element, the first portion operates at a greater power or temperature than the second portion, and the second portion operates at a greater power or temperature than the third portion.

12. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol generating article; a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is in a continuous spiral shape; the width of the exposed area is variable or non-constant in the longitudinal direction of the heating element.

13. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol generating article; a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The first spiral electrode has a first pitch, and the second spiral electrode has a second pitch; the first pitch is different from the second pitch.

14. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol generating article; a heating element at least partially surrounding or defining the chamber and configured to heat the aerosol-generating article; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and combined with the heating element for guiding current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirally shaped extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the second spiral electrode are alternated in the longitudinal direction of the heating element; at least one of the first spiral electrode and the second spiral electrode has a varying pitch.

15. A heater for an aerosol generating device, characterized in that: include: A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The spacing between adjacent windings of the first spiral electrode and the second spiral electrode varies or is non-constant in the longitudinal direction of the heating element.

16. A heater for an aerosol generating device, characterized in that: include: A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is in a continuous spiral shape; the width of the exposed area is variable or non-constant in the longitudinal direction of the heating element.

17. A heater for an aerosol generating device, characterized in that: include: A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and coupled to the heating element, for conducting current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirals extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The first spiral electrode has a first pitch, and the second spiral electrode has a second pitch; the first pitch is different from the second pitch.

18. A heater for an aerosol generating device, characterized in that: include: A tubular heating element having a first end and a second end opposite to each other in a longitudinal direction; A first spiral electrode and a second spiral electrode are spaced apart, surrounding and combined with the heating element for guiding current on the heating element; the first spiral electrode and the second spiral electrode are configured to be spirally shaped extending in the longitudinal direction of the heating element, and the windings of the first spiral electrode and the second spiral electrode are alternated in the longitudinal direction of the heating element; at least one of the first spiral electrode and the second spiral electrode has a varying pitch.

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