Aerosol generating device, and heater for aerosol generating device

Abstract

Provided in the present application are an aerosol generating device, and a heater for an aerosol generating device. The aerosol generating device comprises: a chamber, which is used for receiving an aerosol generating article; and a heater, which is used for heating the aerosol generating article. The heater comprises: a heat insulation element, which surrounds and defines at least part of the chamber and is used for providing heat insulation; an infrared emission coating, which is formed on or bonded to an inner surface of the heat insulation element and is used for heating the aerosol generating article by means of radiating infrared rays; and an electrode coating, which is formed on or bonded to the inner surface of the heat insulation element, is conductively connected to the infrared emission coating, and is used for guiding current on the infrared emission coating. By means of the aerosol generating device, an infrared emission coating for heating is formed on an inner surface of a heat insulation element to form a heater for heating, such that the heater is integrated with heating and heat insulation, thereby facilitating the miniaturization of a product.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202321267276.7, filed with the China National Intellectual Property Administration on May 23, 2023 and entitled "AEROSOL GENERATING DEVICE, AND HEATER FOR AEROSOL GENERATING DEVICE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] Embodiments of this application relate to the field of heat-not-burn aerosol generating technologies, and in particular, to an aerosol generating device and a heater for a heat-not-burn aerosol generating device.BACKGROUND

[0003] A smoking product (such as a cigarette and a cigar) burns tobacco to generate tobacco smoke. People attempt to replace these products that burn tobacco by producing products that release a compound without burning.

[0004] An example of such a product is a heating device, which releases a compound by heating rather than burning a material. For example, the material may be tobacco or another non-tobacco product, and these non-tobacco products may or may not include nicotine. A known heating device accommodates and heats tobacco or another non-tobacco product by using a tubular heater, and forms heat insulation around the heater on an outer side by using a tubular heat insulation element; and during product assembly, the heat insulation element and the heater are independently detachably assembled in the heating device by respectively using a support component or a fixing component, which is disadvantageous for miniaturization of the product.SUMMARY

[0005] An embodiment of this application provides an aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; including: a chamber, configured to receive the aerosol generating article; and a heater, configured to heat the aerosol generating article, where the heater includes: a heat insulation element, surrounding and defining at least a part of the chamber, and configured to provide heat insulation; an infrared emission coating, formed on or bonded to an inner surface of the heat insulation element and configured to heat the aerosol generating article by radiating infrared rays; and an electrode coating, formed on or bonded to the inner surface of the heat insulation element, conductively connected to the infrared emission coating, and configured to guide a current on the infrared emission coating.

[0006] In some embodiments, the infrared emission coating includes a coating that is sprayed, deposited, or printed on the inner surface of the heat insulation element.

[0007] In some embodiments, the heat insulation element includes: an inner wall and an outer wall that face away from each other in a radial direction, and a central region located between the inner wall and the outer wall, where the central region is evacuated, of which a pressure is lower than a pressure outside the heat insulation element, to at least partially provide heat insulation outside the infrared emission coating.

[0008] In some embodiments, the infrared emission coating and the heat insulation element are inseparable from each other.

[0009] In some embodiments, the heater includes an outer surface and an inner surface that face away from each other in the radial direction; and a maximum distance between the outer surface and the inner surface of the heater is less than 3 mm.

[0010] In some embodiments, the aerosol generating device further includes: an opening, where in use, the aerosol generating article can be received in or removed from the chamber through the opening; and the heater includes a first end close to the opening and a second end facing away from the first end; and a support element, at least partially extending into the heater from the second end, to define an abutting step in the heater, where when the aerosol generating article is received in the chamber, the aerosol generating article abuts against the abutting step defined by the support element to form a stop.

[0011] In some embodiments, the infrared emission coating and the support element are arranged in a longitudinal direction of the heater in a staggered manner, to reduce transmission of heat of the infrared emission coating to the support element.

[0012] In some embodiments, an avoidance window is provided on the support element; the electrode coating includes an exposed part partially extending into the avoidance window; and the aerosol generating device further includes: a circuit board, electrically connected to the exposed part, to supply power to the infrared emission coating.

[0013] In some embodiments, the support element is further configured to provide support to the heater at the second end; and at least one first connection structure is disposed on the second end of the heater; and at least one second connection structure adapted to the first connection structure is further disposed on the support element, to prevent the heater from rotating relative to the support element.

[0014] In some embodiments, the aerosol generating device further includes: an electrical insulation layer, formed between the infrared emission coating and the heat insulation element, to provide electrical insulation therebetween.

[0015] In some embodiments, the aerosol generating device further includes: a protective layer, covering or at least partially covering the infrared emission coating to protect the infrared emission coating.

[0016] In some embodiments, a thickness of the infrared emission coating ranges from 5 µm to 50 µm.

[0017] Another embodiment of this application further provides a heater for an aerosol generating device, including: a heat insulation element, constructed into a tubular shape extending in a longitudinal direction of the heater, and configured to provide heat insulation; an infrared emission coating, formed on or bonded to an inner surface of the heat insulation element, and configured to radiate infrared rays for heating; and an electrode coating, formed on or bonded to the inner surface of the heat insulation element, conductively connected to the infrared emission coating, and configured to guide a current on the infrared emission coating.

[0018] According to the foregoing aerosol generating device, the infrared emission coating for heating is formed on the inner surface of the heat insulation element to form the heater for heating, so that the heater is integrated with heating and heat insulation, thereby facilitating miniaturization of a product.BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by using figures in the accompanying drawings corresponding to the one or more embodiments. The exemplary descriptions do not constitute a limitation to the embodiments. In the accompanying drawings, elements with same reference numerals are represented as similar elements. Unless otherwise specified, the figures in the accompanying drawings do not constitute a proportion limitation. FIG. 1 is a schematic diagram of an aerosol generating device according to an embodiment; FIG. 2 is a schematic cross-sectional view from a perspective after a heater and a support element in FIG. 1 are assembled; FIG. 3 is a schematic exploded view of from perspective after the heater and the support element in FIG. 2 are assembled; FIG. 4 is a schematic exploded view from a perspective of the heater in FIG. 3; FIG. 5 is a schematic structural diagram from another perspective after the heater and the support element in FIG. 2 are assembled; and FIG. 6 is a schematic exploded view from a perspective of the heater according to another embodiment. DETAILED DESCRIPTION

[0020] For ease of understanding this application, more detailed descriptions of this application are provided below with reference to the accompanying drawings and specific implementations.

[0021] An embodiment of this application provides an aerosol generating device 100 that heats, rather than burns, an aerosol generating article 1000, for example, a cigarette, to volatilize or release at least one component of the aerosol generating article 1000 to form an aerosol for inhalation, for example, as shown in FIG. 1.

[0022] In an optional embodiment, the aerosol generating article 1000 includes a tobaccocontaining material that volatilizes a compound and is released from a substrate when the aerosol generating article 1000 is heated; or may include a non-tobacco material that is suitable for electric heating to produce smoke after being heated. The aerosol generating article 1000 is preferably a solid substrate, which may include one or more of a powder, particles, shreds, strips, or sheets of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, and expanded tobacco. Alternatively, the solid substrate may include additional tobacco or an additional non-tobacco volatile fragrance compound, to be released when the substrate is heated.

[0023] In addition, as shown in FIG. 1, after being received in the aerosol generating device 100, a part of the aerosol generating article 1000 is exposed outside the aerosol generating device 100, for example, a filter, which is conducive to inhalation for a user.

[0024] For a construction of an aerosol generating device according to an embodiment of this application, refer to FIG. 1. An overall shape of the device is roughly constructed into a shape of a flat cylinder. External components of the aerosol generating device 100 include: a housing 10, having a hollow structure inside, to form an assembly space that may be used for necessary functional components such as an electronic device and a heating device. The housing 10 has a near end 110 and a far end 120 that are opposite to each other in a length direction, where the near end 110 is provided with an opening 111, and through the opening 111, the aerosol generating article 1000 may be received in the housing 10 for heating or removed from the housing 10; and the far end 120 is provided with an air inlet hole 121; and the air inlet hole 121 is configured to allow external air to enter the housing 10 during inhalation.

[0025] As shown in FIG. 1, the aerosol generating device 100 further includes: a chamber, configured to accommodate or receive the aerosol generating article 1000; and in use, the aerosol generating article 1000 may be removably received in the chamber through the opening 111. In some embodiments, a length of the aerosol generating article 1000 that is surrounded and heated by a heater 30 is greater than 30 mm.

[0026] As shown in FIG. 1, the aerosol generating device 100 further includes: a battery cell 130, configured to supply power, where preferably, the battery cell 130 is a rechargeable direct current battery cell 130, and can be charged after being connected to an external power supply; and a circuit board 140, for example, a PCB board, where a circuit or an MCU controller is arranged on the circuit board 140; and the circuit may be an integrated circuit.

[0027] As shown in FIG. 1, the aerosol generating device 100 further includes: the heater 30, at least partially surrounding and defining the chamber. When the aerosol generating article 1000 is received in the housing 10, the heater 30 at least partially surrounds or encloses the aerosol generating article 1000, and performs heating from an outer periphery of the aerosol generating article 1000. Moreover, when received in the housing 10, at least a part of the aerosol generating article 1000 is accommodated and held in the heater 30.

[0028] As shown in FIG. 1, the aerosol generating device 100 further includes: a support element 40, configured to provide support to the heater 30, so that the heater 30 is stably mounted and fixed in the housing 10. Moreover, as shown in FIG. 1, the support element 40 is located at an end of the heater 30 that faces the far end 120.

[0029] As shown in FIG. 1, the aerosol generating device 100 further includes: a support wall 150, arranged extending from the far end 120 toward the near end 110. In addition, during assembly, the support element 40 is fastened or held on the support wall 150.

[0030] Refer to FIG. 2 and FIG. 3. The heater 30 is constructed into a substantially longitudinal tubular shape, and includes a first end 310 and a second end 320 that face away from each other in a longitudinal direction; during assembly, the first end 310 is arranged facing the opening 111 and / or the near end 110, and in use, the aerosol generating article 1000 can be received in the heater 30 through the first end 310 for heating; moreover, the second end 320 is arranged facing the far end 120; and the support element 40 provides support to the heater 30 at the second end 320.

[0031] Refer to FIG. 2 to FIG. 4. The heater 30 includes: a tubular heat insulation element 31. The heat insulation element 31 includes an inner wall 311 and an outer wall 313 that are arranged from inside to outside in a radial direction, and a central region 312 defined between the inner wall 311 and the outer wall 313.

[0032] In some embodiments, the central region 312 is evacuated, of which a pressure is lower than a pressure outside the heat insulation element 31, thereby reducing heat loss from the heater 30 and / or the heated aerosol generating article 1000, that is, providing heat insulation. For example, in some embodiments, the central region 312 has a specific vacuum degree; or the central region 312 includes a high vacuum. In addition, in some embodiments, the pressure in the central region 312 ranges from 0.1 mbar to 0.001 mbar approximately. Moreover, the pressure in the central region 312 is on the order of 10-7 Torr.

[0033] In some embodiments, the inner wall 311 and / or the outer wall 313 includes a stainless steel layer; and the inner wall 311 and / or the outer wall 313 made of the stainless steel layer has a thickness of 50 microns to 500 microns approximately. Alternatively, in other specific embodiments, the inner wall 311 and / or the outer wall 313 has a thickness approximately ranging from 100 µm to 200 µm. Moreover, in some embodiments, the central region 312 between the inner wall 311 and the outer wall 313 has a thickness approximately ranging from 0.1 mm to 1 mm.

[0034] In some embodiments, the heat insulation element 31 has an inner diameter approximately ranging from 5 mm to 10 mm. In some embodiments, the heat insulation element 31 has a length approximately ranging from 15 mm to 45 mm.

[0035] In some other variant embodiments, the heat insulation element 31 may alternatively be constructed into a heat insulation tube made of a material having an extremely low thermal conductivity, for example, a PEEK heat insulation tube having a thermal conductivity lower than 1 W / m·K.

[0036] Refer to FIG. 2 to FIG. 4. The heater 30 includes: an infrared emission coating 33, formed on or bonded to an inner surface of the inner wall 311.

[0037] In some embodiments, the infrared emission coating 33 is a coating that is formed on the inner surface of the inner wall 311 by depositing, spraying, printing, or the like. Particularly, the infrared emission coating 33 may be formed on the inner surface of the inner wall 311 through transfer printing; and for example, transfer printing may be performed by pre-bonding the infrared emission coating 33 to an outer surface of a tubular base, and then sleeving the heat insulation element 31 outside the tubular base. After the infrared emission coating 33 and the heat insulation element 31 are tightly bonded by baking or the like, the tubular base is removed to obtain the infrared emission coating 33 formed on the inner surface of the heat insulation element 31.

[0038] In some embodiments, the infrared emission coating 33 is an electrically induced infrared emission coating; and the infrared emission coating 33 can heat the aerosol generating article 1000 by radiating infrared rays. Correspondingly, the infrared emission coating 33 is composed of an oxide of at least one metal element such as Mg, Al, Ti, Zr, Mn, Fe, Co, Ni, Cu, Cr, and Zn. When the metal oxide is heated to a proper temperature, the metal oxide can radiate far infrared rays having a heating effect. More preferably, the infrared emission coating 33 based on infrared heating includes an infrared coating of tin oxide and zinc oxide, or an infrared coating including carbon fibers.

[0039] In some embodiments, a thickness of the infrared emission coating 33 ranges from 5 µm to 50 µm.

[0040] Refer to FIG. 2 to FIG. 4. The infrared emission coating 33 formed by spraying, printing, or the like is non-closed in a circumferential direction; and the infrared emission coating 33 has a vacancy 331 extending through in the longitudinal direction. The vacancy 331 has a width approximately ranging from 0.5 mm to 2 mm.

[0041] Refer to FIG. 2 to FIG. 4. The infrared emission coating 33 further includes: a first electrode coating 351 and a second electrode coating 352, arranged at intervals in the circumferential direction of the infrared emission coating 33. The first electrode coating 351 and the second electrode coating 352 are respectively located on two sides of the vacancy 331, and are conductively connected to the infrared emission coating 33; and in use, by using the first electrode coating 351 and the second electrode coating 352, a current is guided in the circumferential direction of the infrared emission coating 33. The first electrode coating 351 and / or the second electrode coating 352 extends in the longitudinal direction of the heater 30. The first electrode coating 351 and / or the second electrode coating 352 is made of metal or alloy having a low resistance; and in some specific embodiments, the first electrode coating 351 and / or the second electrode coating 352 includes gold, silver, copper, or alloys thereof.

[0042] In the foregoing heater 30, the infrared emission coating 33 for heating is integrated or formed on the inner wall 311 of the heat insulation element 31 by spraying, depositing, printing, or the like, so that the heater 30 is integrated with heating and heat insulation, and miniaturization is facilitated. Moreover, in the foregoing embodiment, the infrared emission coating 33 and the heat insulation element 31 cannot be disassembled or separated from each other.

[0043] Refer to FIG. 2 to FIG. 4. When stainless steel is used as a conductive material of the inner wall 311 of the heat insulation element 31, the heater 30 further includes: an electrical insulation layer 32, formed on the inner surface of the inner wall 311 of the heat insulation element 31 by depositing, spraying, printing, or the like, to provide electrical insulation between the inner wall 311 and the infrared emission coating 33. The infrared emission coating 33 is then bonded to the electrical insulation layer 32 by spraying, depositing, printing, or the like. In some embodiments, the electrical insulation layer 32 includes one of ceramic, glass, or a glaze. In some embodiments, a thickness of the electrical insulation layer 32 ranges from 5 µm to 50 µm.

[0044] Refer to FIG. 2 to FIG. 4. The heater 30 further includes: a protective layer 34, on an inner surface of the heater 30, covering the infrared emission coating 33, and covering a part of the first electrode coating 351 and the second electrode coating 352. The protective layer 34 is configured to protect the infrared emission coating 33. The protective layer 34 is a coating or the like formed by spraying, depositing, printing, or the like; and the protective layer 34 includes ceramic, glass, a glaze, or the like. In some embodiments, the protective layer 34 is transparent or translucent; and a thickness of the protective layer 34 ranges from 5 µm to 50 µm.

[0045] As shown in FIG. 2, after preparation, at a position close to the first end 310 of the heater 30, the electrical insulation layer 32 and the protective layer 34 completely encapsulate the infrared emission coating 33, which is suitable for providing electrical insulation and protection. Specifically, a distance d1 exists between an end of the infrared emission coating 33 close to the first end 310 of the heater 30 and an end of the electrical insulation layer 32 close to the first end 310 of the heater 30. In some embodiments, the distance d1 is greater than 0.2 mm; and preferably, the distance d1 may range from 0.5 mm to 5 mm.

[0046] Similarly, after preparation, at the second end 320 of the heater 30, the distance d1 is formed between an end of the infrared emission coating 33 close to the second end 320 of the heater 30 and an end of the electrical insulation layer 32 close to the second end 320 of the heater 30.

[0047] As shown in FIG. 2 to FIG. 4, a length of the first electrode coating 351 and a length of the second electrode coating 352 are greater than a length of the infrared emission coating 33. For example, in some specific embodiments, the length of the first electrode coating 351 and the length of the second electrode coating 352 are greater than the length of the infrared emission coating 33 by 10 mm. In FIG. 2 to FIG. 4, the first electrode coating 351 and the second electrode coating 352 are level with the infrared emission coating 33 at a position close to the first end 310; and the first electrode coating 351 and the second electrode coating 352 extend outside the infrared emission coating 33 or protrude further at a position close to the second end 320.

[0048] As shown in FIG. 2 to FIG. 4, the support element 40 is constructed into a ring shape; and the support element 40 includes: a first section 43 and a second section 42 sequentially arranged in the longitudinal direction. A flange 41 radially extending outward is arranged at an outer periphery of the second section 42; and the flange 41 is far away from the first section 43.

[0049] During assembly, the first section 43 and the second section 42 extend into the heater 30 from the second end 320 of the heater 30; and the second end 320 of the heater 30 abuts against the flange 41 to form support. Moreover, as shown in FIG. 3, a positioning clamping protrusion 44 is further arranged on an outer surface of the second section 42, and the second end 320 of the heater 30 is provided with a positioning notch 314. During assembly, the positioning clamping protrusion 44 and the positioning notch 314 cooperate to provide positioning for the support element 40 and the heater 30, and prevent the support element 40 and the heater 30 from rotating relative to each other after assembly.

[0050] In some embodiments, when the heater 30 abuts against the support element 40 after assembly, the infrared emission coating 33 and the support element 40 are staggered in the longitudinal direction. For example, as shown in FIG. 2, the infrared emission coating 33 maintains a distance d3 from the first section 43 of the support element 40; and the distance d3 is greater than 1 mm, for example, from 2 mm to 5 mm, so that it is conducive to preventing a large amount of heat of the infrared emission coating 33 from being transferred to the support element 40.

[0051] As shown in FIG. 2 to FIG. 5, an outer diameter of the first section 43 is less than an outer diameter of the second section 42; moreover, a plurality of protruding edges 422 are arranged at intervals on an outer surface of the second section 42 in a circumferential direction; and after assembly, the protruding edges 422 abut against the inner surface of the heater 30, so that the protruding edges 422 are basically and stably combined with the heater 30 in the radial direction. Moreover, the first section 43 defines an abutting step in the chamber, and the aerosol generating article 1000 received in the heater 30 abuts against the first section 43 to form a stop.

[0052] As shown in FIG. 2 to FIG. 5, the following is further arranged between the first section 43 of the support element 40 and the heater 30: the flexible sealing element 50 is made of a flexible material such as silicone, for example, an O-ring, to provide a seal therebetween. The sealing element 50 is configured to prevent aerosol condensate within the aerosol generating article 1000 from penetrating therebetween, or to provide a hermetic seal therebetween.

[0053] As shown in FIG. 2 to FIG. 5, an avoidance window 421 is provided on the second section 42 of the support element 40; after assembly, the first electrode coating 351 and the second electrode coating 352 partially extend into the avoidance window 421; and the first electrode coating 351 has an exposed part 3511 extending and exposed to the avoidance window 421, and the second electrode coating 352 has an exposed part 3521 extending and exposed to the avoidance window 421. Further, after assembly, a conductive lead, a conductive contact piece, or the like extends into the support element 40 and is welded or abuts against the exposed part 3511 and the exposed part 3521 to form a conductive connection, so that the circuit board 140 supplies power to the heater 30 through the conductive lead, the conductive contact piece, or the like.

[0054] As shown in FIG. 2 to FIG. 5, the protective layer 34 avoids the exposed part 3511 and the exposed part 3521. Moreover, a length d2 of the exposed part 3511 and / or the exposed part 3521 approximately ranges from 2 mm to 5 mm.

[0055] In some embodiments, a maximum distance between the inner surface and an outer surface of the foregoing heater 30 in the radial direction is less than 3 mm, so that the heater 30 has a very small size, which is greatly conducive to miniaturization of a product.

[0056] Alternatively, FIG. 6 is a schematic diagram of a heater 30a according to another variant embodiment. In this embodiment, the heater 30a includes a heat insulation element 31a, a first electrode coating 351a and a second electrode coating 352a, an electrical insulation layer 32a, and a protective layer 34a.

[0057] The heat insulation element 31a is configured to provide heat insulation; the heat insulation element 31a includes a metal, for example, stainless steel, and the heat insulation element 31a is a conductor; a first infrared emission coating 3310a and a second infrared emission coating 3320a are formed on or bonded to an inner surface of the heat insulation element 31a, and the first infrared emission coating 3310a and the second infrared emission coating 3320a are formed by spraying, depositing, printing, or the like; moreover, the first infrared emission coating 3310a and the second infrared emission coating 3320a are arranged facing away from each other in the radial direction of the heater 30a; and furthermore, the first infrared emission coating 3310a and the second infrared emission coating 3320a are in a shape of a semicircular arc.

[0058] A first electrode coating 351a and a second electrode coating 352a are arranged facing away from each other in the radial direction; both the first infrared emission coating 3310a and the second infrared emission coating 3320a are electrically connected between the first electrode coating 351a and the second electrode coating 352a; and the first infrared emission coating 3310a and the second infrared emission coating 3320a are connected in parallel between the first electrode coating 351a and the second electrode coating 352a, to guide a current, through the first electrode coating 351a and the second electrode coating 352a, in a circumferential direction of the first infrared emission coating 3310a and the second infrared emission coating 3320a.

[0059] The electrical insulation layer 32a is located between the inner surface of the heat insulation element 31a and the first infrared emission coating 3310a and / or the second infrared emission coating 3320a, thereby providing electrical insulation therebetween.

[0060] The protective layer 34a covers the first infrared emission coating 3310a and / or the second infrared emission coating 3320a, thereby providing surface protection therefor.

[0061] Alternatively, in some other variant embodiments, the heater 30a may include more infrared emission coatings. Alternatively, the heater 30a may include only an infrared emission coating having a closed ring shape in a circumferential direction.

[0062] It should be noted that the specification and the accompanying drawings of this application provide preferred embodiments of this application, but are not limited to the embodiments described in this specification. Further, a person of ordinary skill in the art may make improvements or variations according to the foregoing descriptions, and all such improvements and variations shall fall within the protection scope of the claims of this application.

Claims

1. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol, comprising: a chamber, configured to receive the aerosol generating article; and a heater, configured to heat the aerosol generating article, wherein the heater comprises: a heat insulation element, surrounding and defining at least a part of the chamber, and configured to provide heat insulation; an infrared emission coating, formed on or bonded to an inner surface of the heat insulation element and configured to heat the aerosol generating article by radiating infrared rays; and an electrode coating, formed on or bonded to the inner surface of the heat insulation element, conductively connected to the infrared emission coating, and configured to guide a current on the infrared emission coating.

2. The aerosol generating device according to claim 1, wherein the heat insulation element comprises: an inner wall and an outer wall that face away from each other in a radial direction, and a central region located between the inner wall and the outer wall, wherein the central region is evacuated, of which a pressure is lower than a pressure outside the heat insulation element, to at least partially provide heat insulation outside the infrared emission coating.

3. The aerosol generating device according to claim 1 or 2, wherein the infrared emission coating and the heat insulation element are inseparable from each other.

4. The aerosol generating device according to claim 1 or 2, wherein the heater comprises an outer surface and an inner surface that face away from each other in the radial direction; and a maximum distance between the outer surface and the inner surface of the heater is less than 3 mm.

5. The aerosol generating device according to claim 1 or 2, further comprising: an opening, wherein in use, the aerosol generating article is capable of being received in or removed from the chamber through the opening; and the heater comprises a first end close to the opening and a second end facing away from the first end; and a support element, at least partially extending into the heater from the second end, to define an abutting step in the heater, wherein when the aerosol generating article is received in the chamber, the aerosol generating article abuts against the abutting step defined by the support element to form a stop.

6. The aerosol generating device according to claim 5, wherein the infrared emission coating and the support element are arranged in a longitudinal direction of the heater in a staggered manner, to reduce transmission of heat of the infrared emission coating to the support element.

7. The aerosol generating device according to claim 5, wherein an avoidance window is provided on the support element; and the electrode coating comprises an exposed part partially extending into the avoidance window; and the aerosol generating device further comprises: a circuit board, electrically connected to the exposed part, to supply power to the infrared emission coating.

8. The aerosol generating device according to claim 5, wherein the support element is further configured to provide support to the heater at the second end; and at least one first connection structure is disposed on the second end of the heater; and at least one second connection structure adapted to the first connection structure is further disposed on the support element, to prevent the heater from rotating relative to the support element.

9. The aerosol generating device according to claim 1 or 2, further comprising: an electrical insulation layer, formed between the infrared emission coating and the heat insulation element, to provide electrical insulation therebetween.

10. The aerosol generating device according to claim 1 or 2, further comprising: a protective layer, covering or at least partially covering the infrared emission coating to protect the infrared emission coating.

11. The aerosol generating device according to claim 1 or 2, wherein a thickness of the infrared emission coating ranges from 5 µm to 50 µm.

12. A heater for an aerosol generating device, comprising: a heat insulation element, constructed into a tubular shape extending in a longitudinal direction of the heater, and configured to provide heat insulation; an infrared emission coating, formed on or bonded to an inner surface of the heat insulation element, and configured to radiate infrared rays for heating; and an electrode coating, formed on or bonded to the inner surface of the heat insulation element, conductively connected to the infrared emission coating, and configured to guide a current on the infrared emission coating.

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