Heater for aerosol-forming substrate and aerosol-generating device

Abstract

The utility model relates to a heater for an aerosol-forming substrate and an aerosol generating device.The heater for the aerosol-forming substrate comprises a first heating structure and a graphene coating, and a heating cavity used for containing the aerosol-forming substrate is formed in the first heating structure; the first heating structure is constructed to be capable of heating aerosol to form a substrate, a smoke outlet and a first air inlet which are both communicated with the heating cavity are formed in the first heating structure, and the graphene coating is located in the heating cavity and covers at least part of the cavity wall of the heating cavity. On one hand, the graphene coating can transmit heat of the first heating structure to the aerosol-forming substrate in a heat radiation mode, on the other hand, the graphene coating can reflect heat radiation from the interior of the heating cavity, and on the other hand, the graphene coating can also transmit heat to the aerosol-forming substrate in a heat conduction mode, so that the aerosol-forming substrate can be heated more effectively. This reduces heat transfer loss between the first heating structure and the aerosol-forming substrate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aerosol generating devices, and in particular, to a heater for an aerosol-forming substrate and an aerosol generating device. Background Art

[0002] Aerosol generating devices are usually used to heat an aerosol-forming substrate so that the aerosol-forming substrate releases an aerosol for the user to inhale without burning. In the related art, how to shorten the waiting time for the user to inhale the first aerosol is an urgent problem to be solved in the field of aerosol generating device technology. Utility Model Content

[0003] An object of the present disclosure is to provide a heater for an aerosol-forming substrate and an aerosol generating device to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above object, according to a first aspect of the present disclosure, a heater for an aerosol-forming substrate is provided, comprising:

[0005] a first heating structure, wherein a heating cavity for accommodating an aerosol-forming substrate is disposed inside the first heating structure, the first heating structure is configured to heat the aerosol-forming substrate, and the first heating structure is provided with a smoke outlet and a first air inlet both of which are in communication with the heating cavity;

[0006] A graphene coating is located in the heating chamber and covers at least a portion of a chamber wall of the heating chamber.

[0007] Optionally, the graphene coating at least covers a cavity wall of the heating cavity close to the smoke outlet.

[0008] Optionally, a ratio of a length of the graphene coating along the axial direction of the heating chamber to a length of the heating chamber along the axial direction of the heating chamber is 1 / 4 to 1 / 2.

[0009] Optionally, the graphene coating covers the entire cavity wall of the heating cavity.

[0010] Optionally, the infrared radiation emissivity of the graphene coating is 0.9 to 0.95.

[0011] Optionally, the first heating structure includes a first heating part and a second heating part, the heating chamber includes a first chamber and a second chamber, the first chamber is arranged in the first heating part, the second chamber is arranged in the second heating part, the smoke outlet is arranged on the first heating part, and the first air inlet is arranged on the second heating part;

[0012] Wherein, a heating rate of the first heating part can be greater than a heating rate of the second heating part.

[0013] Optionally, the first heating part includes a first electromagnetic induction coil and a first electromagnetic induction heating core, the first electromagnetic induction coil is located outside the first electromagnetic induction heating core and surrounds the first electromagnetic induction heating core, the first chamber is arranged in the first electromagnetic induction heating core, and the smoke outlet is arranged on the first electromagnetic induction heating core;

[0014] The second heating part includes a second electromagnetic induction coil and a second electromagnetic induction heating core, the second electromagnetic induction coil is located outside the second electromagnetic induction heating core and surrounds the second electromagnetic induction heating core, the second chamber is arranged in the second electromagnetic induction heating core, and the first air inlet is arranged on the second electromagnetic induction heating core;

[0015] The spacing between adjacent turns of the first electromagnetic induction coil is smaller than the spacing between adjacent turns of the second electromagnetic induction coil.

[0016] Optionally, the first electromagnetic induction heating core and the second electromagnetic induction heating core are integrally formed.

[0017] Optionally, the graphene coating at least covers a cavity wall of the first chamber, and a radial projection of the first electromagnetic induction coil along the first chamber at least partially overlaps with a radial projection of the graphene coating along the first chamber.

[0018] Optionally, a spacing between adjacent turns of the first electromagnetic induction coil is 0 mm.

[0019] Optionally, a length of the first electromagnetic induction coil along the axial direction of the first chamber is 3 mm to 6 mm.

[0020] Optionally, the first heating structure further comprises a first coil support, the first electromagnetic induction heating core and the second electromagnetic induction heating core are both located in the first coil support, and the first electromagnetic induction coil and the second electromagnetic induction coil are wound on an outer surface of the first coil support.

[0021] Optionally, the heater further comprises a second heating structure;

[0022] An airflow heating channel is provided inside the second heating structure, the airflow heating channel is communicated with the first air inlet, and the second heating structure is configured to heat the airflow flowing through the airflow heating channel.

[0023] Optionally, the second heating structure includes a third electromagnetic induction coil and a third electromagnetic induction heating core, the third electromagnetic induction coil is located outside the third electromagnetic induction heating core and surrounds the third electromagnetic induction heating core, and the airflow heating channel is arranged in the third electromagnetic induction heating core.

[0024] Optionally, the heater also includes a connecting bracket, one end of the connecting bracket is connected to the first heating structure, the other end of the connecting bracket is formed with a slot, at least part of the third electromagnetic induction heating core is inserted into the slot, and a connecting channel connecting the airflow heating channel and the first air inlet is formed on the connecting bracket.

[0025] Optionally, the heater also includes an air inlet pipe, an air inlet channel is arranged in the air inlet pipe, one end of the third electromagnetic induction heating core is inserted in the card slot, the other end of the third electromagnetic induction heating core is inserted in the air inlet channel, and a second air inlet is formed at one end of the air inlet pipe away from the third electromagnetic induction heating core.

[0026] Optionally, the second heating structure further comprises a second coil support, the second coil support is sleeved on the outside of at least a portion of the connecting support and at least a portion of the air intake pipe, and the third electromagnetic induction coil is wound on the outer surface of the second coil support.

[0027] Optionally, the airflow heating channels are provided in a plurality, and the plurality of airflow heating channels are arranged in a honeycomb shape; or,

[0028] A plurality of partitions are arranged inside the airflow heating channel, and the plurality of partitions divide the airflow heating channel into a plurality of sub-channels.

[0029] According to a second aspect of the present disclosure, there is provided an aerosol generating device comprising the above-mentioned heater.

[0030] By arranging the graphene coating in the heating chamber and covering at least part of the cavity wall of the heating chamber, on the one hand, during the process of the first heating structure heating the aerosol-forming substrate, the graphene coating can absorb the heat from the first heating structure through the cavity wall of the heating chamber, and transfer the heat to the aerosol-forming substrate by means of thermal radiation (the graphene coating can absorb the heat from the first heating structure, stimulate the graphene lattice vibration and electronic activity, and convert the heat into a large amount of infrared rays, thereby transferring radiation energy to the aerosol-forming substrate). On the other hand, the graphene coating can reflect the thermal radiation from the inside of the heating chamber, thereby reducing the heat loss caused by the heat inside the heating chamber due to the heat radiation to the outside, which is conducive to better maintaining the temperature inside the heating chamber, so that the heat released by the first heating structure can be more efficiently utilized. Therefore, the above technical solution can reduce the heat transfer loss between the first heating structure and the aerosol-forming substrate, thereby improving the heat transfer efficiency between the first heating structure and the aerosol-forming substrate, and improving the heating rate of the aerosol-forming substrate, thereby shortening the waiting time for the user to inhale the first aerosol.

[0031] Moreover, when the temperature is low, the thermal radiation is mainly radiated in the form of invisible infrared rays. For example, when the temperature is around 300°C, the strongest wavelength in the thermal radiation is in the infrared region, and the graphene coating can efficiently transfer the heat of around 300°C to the aerosol-forming matrix through infrared rays, which is beneficial to shorten the time it takes to heat the aerosol-forming matrix to around 300°C. Especially when the aerosol-forming matrix is ​​the e-cigarette liquid (the temperature at which the liquid forms smoke is usually around 300°C), it can effectively shorten the time it takes for the liquid to form smoke, thereby effectively shortening the time it takes for the user to inhale the first puff of smoke.

[0032] When the aerosol-forming substrate is placed in the heating chamber and adhered to the graphene coating, the graphene coating can also transfer the heat of the cavity wall of the heating chamber to the aerosol-forming substrate by heat conduction. Since the graphene coating also has excellent thermal conductivity, the heat transfer efficiency between the first heating structure and the aerosol-forming substrate can be further improved, thereby shortening the time it takes for the user to inhale the first puff of smoke.

[0033] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0035] Figure 1 is a front view of a heater for an aerosol-forming substrate provided in one embodiment of the present disclosure;

[0036] Figure 2 is a cross-sectional view of a heater for an aerosol-forming substrate provided in one embodiment of the present disclosure;

[0037] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0038] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0039] Figure 5 is an exploded view of a heater for an aerosol-forming substrate provided in accordance with one embodiment of the present disclosure;

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of a third electromagnetic induction heating core of a heater for an aerosol-forming substrate provided in one embodiment of the present disclosure;

[0041] Figure 7 It is a schematic diagram of the three-dimensional structure of a third electromagnetic induction heating core of a heater for an aerosol-forming substrate provided in another embodiment of the present disclosure.

[0042] Description of Reference Numerals

[0043] 1-heater; 10-first heating structure; 11-heating chamber; 111-first chamber; 112-second chamber; 12-smoke outlet; 13-first air inlet; 14-first heating part; 141-first electromagnetic induction coil; 142-first electromagnetic induction heating core; 15-second heating part; 151-second electromagnetic induction coil; 152-second electromagnetic induction heating core; 16-first coil support; 20-second heating structure; 21-airflow heating channel; 22-third electromagnetic induction coil; 23-third Electromagnetic induction heating core; 24-second coil bracket; 25-partitioning piece; 30-graphene coating; 40-connecting bracket; 41-card slot; 42-connecting channel; 50-air inlet pipe; 51-air inlet channel; 511-second air inlet; a-the axial length of the graphene coating along the heating chamber; b-the axial length of the heating chamber along the heating chamber; c-the spacing between adjacent turns of the first electromagnetic induction coil; d-the spacing between adjacent turns of the second electromagnetic induction coil; e-the axial length of the first electromagnetic induction coil along the first chamber. DETAILED DESCRIPTION

[0044] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0045] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined by the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. "Inside and outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second", etc., are used to distinguish one element from another, and do not have order and importance.

[0046] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0047] The aerosol generating device in the related art usually has a heater for heating the aerosol-forming matrix. When the aerosol generating device detects the user's inhalation action (such as when the sensor detects the airflow generated by the user's inhalation), the aerosol generating device controls the heater to heat the aerosol-forming matrix, so that the temperature of the aerosol-forming matrix gradually increases until an aerosol is formed. In the related art, the heating rate of the aerosol-forming matrix is ​​slow (for example, the heater transfers heat to the aerosol-forming matrix by heat conduction, and the heat utilization rate is limited, resulting in a slow heating rate of the aerosol-forming matrix). The user needs to wait a long time to inhale the first aerosol, which affects the user experience.

[0048] In view of this, if Figures 1 to 7 As shown, according to the first aspect of the present disclosure, a heater 1 for an aerosol-forming substrate is provided, comprising a first heating structure 10, a heating chamber 11 for accommodating an aerosol-forming substrate is provided inside the first heating structure 10, the first heating structure 10 is configured to heat the aerosol-forming substrate, and a smoke outlet 12 and a first air inlet 13 are provided on the first heating structure 10, both of which are connected to the heating chamber 11. The first heating structure 10 can heat the aerosol-forming substrate contained in the heating chamber 11, so that the temperature of the aerosol-forming substrate is increased to form an aerosol, and the user's inhalation action can generate an airflow that sequentially passes through the first air inlet 13, the heating chamber 11 and the smoke outlet 12 and flows into the user's mouth, and the aerosol in the heating chamber 11 can be inhaled into the user's mouth along with the airflow.

[0049] Among them, Figure 3As shown, the heater 1 for an aerosol-forming substrate further comprises a graphene coating 30 , which is located in the heating chamber 11 and covers at least a portion of the chamber wall of the heating chamber 11 .

[0050] By arranging the graphene coating 30 in the heating chamber 11 and covering at least part of the chamber wall of the heating chamber 11 with the graphene coating 30, on the one hand, during the process of the first heating structure 10 heating the aerosol-forming matrix, the graphene coating 30 can absorb the heat from the first heating structure 10 through the chamber wall of the heating chamber 11, and transfer the heat to the aerosol-forming matrix by thermal radiation (the graphene coating 30 can absorb the heat from the first heating structure 10, stimulate the graphene lattice vibration and electronic activity, and convert the heat into a large amount of infrared rays, thereby transferring radiation energy to the aerosol-forming matrix). On the other hand, the graphene coating 30 can reflect the thermal radiation from the inside of the heating chamber 11, thereby reducing the heat loss inside the heating chamber 11 due to outward thermal radiation, which is conducive to better maintaining the temperature inside the heating chamber 11, so that the heat released by the first heating structure can be more efficiently utilized. Therefore, the above technical solution can reduce the heat transfer loss between the first heating structure 10 and the aerosol-forming substrate, thereby improving the heat transfer efficiency from the first heating structure 10 to the aerosol-forming substrate, increasing the heating rate of the aerosol-forming substrate, and thereby shortening the waiting time for the user to inhale the first aerosol.

[0051] Furthermore, when the temperature is low, the thermal radiation is mainly radiated in the form of invisible infrared rays. For example, when the temperature is around 300°C, the strongest wavelength in the thermal radiation is in the infrared region, and the graphene coating 30 can efficiently transfer the heat of around 300°C to the aerosol-forming matrix through infrared rays, which helps to shorten the time it takes to heat the aerosol-forming matrix to around 300°C. In particular, when the aerosol-forming matrix is ​​the e-cigarette liquid (the temperature at which the liquid forms smoke is usually around 300°C), it can effectively shorten the time it takes for the liquid to form smoke, thereby effectively shortening the time it takes for the user to inhale the first puff of smoke.

[0052] Here, it should be noted that, since thermal radiation is a heat transfer method in which an object emits heat energy outward in the form of electromagnetic radiation, after the aerosol-forming substrate is placed in the heating chamber 11, the aerosol-forming substrate may or may not be attached to the graphene coating 30, and the present disclosure does not limit this. For the case where the aerosol-forming substrate is not in contact with the graphene coating 30 after being placed in the heating chamber 11, the graphene coating 30 can also transfer heat to the aerosol-forming substrate by means of thermal radiation; and for the case where the aerosol-forming substrate is attached to the graphene coating 30 after being placed in the heating chamber 11, the graphene coating 30 can also transfer the heat of the cavity wall of the heating chamber 11 to the aerosol-forming substrate by means of heat conduction. Since graphene also has excellent thermal conductivity, it can further improve the heat transfer efficiency between the first heating structure and the aerosol-forming substrate, and shorten the time for the user to inhale the first puff of smoke.

[0053] Among them, the infrared radiation emissivity of the graphene coating 30 can be any suitable value, and the present disclosure is not limited to this. In one embodiment of the present disclosure, the infrared radiation emissivity of the graphene coating 30 can be 0.9~0.95, so that the graphene coating 30 has a good ability to emit infrared radiation.

[0054] In addition, the first heating structure 10 may be an electromagnetic heating structure or a resistive heating structure, which is not limited in the present disclosure.

[0055] In order to make the arrangement of the graphene coating 30 effectively shorten the waiting time for the user to inhale the first aerosol, as an implementation method, Figures 2 to 4 It is shown that the graphene coating 30 can at least cover the cavity wall of the heating cavity 11 close to the smoke outlet 12, that is, the distance between one end of the graphene coating 30 close to the smoke outlet 12 and the smoke outlet 12 is greater than the distance between one end of the graphene coating 30 close to the first air inlet 13 and the first air inlet 13.

[0056] Since the smoke outlet 12 is closer to the user's mouth than other positions of the heating chamber 11, the graphene coating 30 at least covers the cavity wall of the heating chamber 11 close to the smoke outlet 12, so that the first heating structure 10 can transfer heat well to the part of the aerosol-forming matrix close to the user's mouth in the form of thermal radiation through the graphene coating 30, so that the part of the aerosol-forming matrix close to the user's mouth can be heated to a temperature capable of forming an aerosol more quickly, thereby effectively shortening the time the user needs to wait to inhale the first aerosol.

[0057] Alternatively, if Figure 2As shown, the ratio of the axial length a of the graphene coating 30 along the heating chamber 11 to the axial length b of the heating chamber 11 along the heating chamber 11 can be 1 / 4 to 1 / 2. On the one hand, it is beneficial to concentrate the heat on the part of the aerosol-forming matrix close to the smoke outlet 12, and further shorten the time for the part of the aerosol-forming matrix close to the smoke outlet 12 to generate aerosol, thereby shortening the waiting time for the user to inhale the first aerosol. On the other hand, it can save the material of the graphene coating 30 and reduce the cost.

[0058] As other embodiments of the present disclosure, the graphene coating 30 can cover the entire cavity wall of the heating cavity 11, so that the first heating structure 10 can perform good heat transfer to various parts of the aerosol-forming matrix in the form of thermal radiation through the graphene coating 30, which is beneficial to improving the heating rate at various positions of the aerosol-forming matrix.

[0059] In order to further shorten the waiting time for the user to inhale the first aerosol, in the present disclosure, as an embodiment, Figures 2 to 4 As shown, the first heating structure 10 may include a first heating part 14 and a second heating part 15, the heating chamber 11 includes a first chamber 111 and a second chamber 112, the first chamber 111 is arranged in the first heating part 14, the second chamber 112 is arranged in the second heating part 15, the smoke outlet 12 is arranged on the first heating part 14, and the first air inlet 13 is arranged on the second heating part 15, wherein the heating rate of the first heating part 14 can be greater than the heating rate of the second heating part 15.

[0060] Since the first chamber 111 is arranged in the first heating part 14, and the second chamber 112 is arranged in the second heating part 15, that is, the heating rate of the first heating part 14 can mainly affect the heating rate of the first chamber 111, and the heating rate of the second heating part 15 can mainly affect the heating rate of the second chamber 112, and the heating rate of the first heating part 14 can be greater than the heating rate of the second heating part 15. Therefore, the heating rate of the first chamber 111 can be greater than the heating rate of the second chamber 112, and the smoke outlet 12 is arranged in the first chamber 111. On a heating portion 14, the first air inlet 13 is arranged on the second heating portion 15, that is, the heating rate of the portion of the heating chamber 11 close to the smoke outlet 12 (the first chamber 111) is greater than the heating rate of the portion of the heating chamber 11 close to the first air inlet 13 (the second chamber 112), so that the portion of the aerosol generating substrate close to the smoke outlet 12 (that is, the portion of the aerosol generating substrate close to the user's mouth) can be heated to a temperature capable of forming an aerosol more quickly, thereby further shortening the time the user needs to wait for inhaling the first aerosol.

[0061] In order to make the heating rate of the first heating unit 14 greater than the heating rate of the second heating unit 15, as an implementation method, Figure 2 and Figure 3 As shown, the first heating structure 10 can be an electromagnetic heating structure, the first heating part 14 includes a first electromagnetic induction coil 141 and a first electromagnetic induction heating core 142, the first electromagnetic induction coil 141 is located outside the first electromagnetic induction heating core 142 and surrounds the first electromagnetic induction heating core 142, the first chamber 111 is arranged in the first electromagnetic induction heating core 142, and the smoke outlet 12 is arranged on the first electromagnetic induction heating core 142, the second heating part 15 includes a second electromagnetic induction coil 151 and a second electromagnetic induction heating core 152, the second electromagnetic induction coil 151 is located outside the second electromagnetic induction heating core 152 and surrounds the second electromagnetic induction heating core 152, the second chamber 112 is arranged in the second electromagnetic induction heating core 152, the first air inlet 13 is arranged on the second electromagnetic induction heating core 152, and the spacing c between adjacent turns of the first electromagnetic induction coil 141 is smaller than the spacing d between adjacent turns of the second electromagnetic induction coil 151.

[0062] It can be understood that the spacing c between adjacent turns of the first electromagnetic induction coil 141 refers to the spacing between two adjacent turns of the first electromagnetic induction coil 141 , and the spacing d between adjacent turns of the second electromagnetic induction coil 151 refers to the spacing between two adjacent turns of the second electromagnetic induction coil 151 .

[0063] By locating the first electromagnetic induction coil 141 outside the first electromagnetic induction heating core 142 and surrounding the first electromagnetic induction heating core 142, and setting the first chamber 111 inside the first electromagnetic induction heating core 142, it is possible to energize the first electromagnetic induction coil 141 so that a magnetic flux penetrating the first electromagnetic induction heating core 142 is generated inside the first electromagnetic induction coil 141, thereby gradually increasing the temperature of the first electromagnetic induction heating core 142 under the action of electromagnetic induction, and heating the portion of the aerosol-forming matrix located in the first chamber 111.

[0064] Similarly, by locating the second electromagnetic induction coil 151 outside the second electromagnetic induction heating core 152 and surrounding the second electromagnetic induction heating core 152, and setting the second chamber 112 inside the second electromagnetic induction heating core 152, it is possible to energize the second electromagnetic induction coil 151 so that a magnetic flux penetrating the second electromagnetic induction heating core 152 is generated inside the second electromagnetic induction coil 151, thereby gradually increasing the temperature of the second electromagnetic induction heating core 152 under the action of electromagnetic induction, and heating the portion of the aerosol-forming matrix located in the second chamber 112.

[0065] Furthermore, since the spacing between adjacent turns of the first electromagnetic induction coil 141 is smaller than the spacing between adjacent turns of the second electromagnetic induction coil 151, the first electromagnetic induction coil 141 can generate more magnetic fluxes penetrating the first electromagnetic induction heating core 142, so that after the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151 are energized, the heating rate of the first electromagnetic induction heating core 142 can be greater than the heating rate of the second electromagnetic induction heating core 152, that is, the heating rate of the first heating part 14 can be greater than the heating rate of the second heating part 15.

[0066] In another embodiment, the spacing between adjacent turns of the first electromagnetic induction coil 141 may also be equal to the spacing between adjacent turns of the second electromagnetic induction coil 151, and the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151 are powered by different power sources, respectively, and the current passed through the first electromagnetic induction coil 141 is greater than the current passed through the second electromagnetic induction coil 151, so that the heating rate of the first electromagnetic induction heating core 142 is greater than the heating rate of the second electromagnetic induction heating core 152.

[0067] In the present disclosure, the first electromagnetic induction heating core 142 and the second electromagnetic induction heating core 152 can be integrally formed, or the first electromagnetic induction heating core 142 and the second electromagnetic induction heating core 152 can be two independent structures. Technicians can choose different molding methods according to different needs, and the present disclosure does not limit this.

[0068] As another embodiment, the first heating structure 10 can be a resistive heating structure, the first heating part 14 can include a first heating resistor, the second heating part 15 can include a second heating resistor, the first chamber 111 is arranged in the first heating resistor, and the second chamber 112 is arranged in the second heating resistor, wherein the resistance value of the first heating resistor is greater than the resistance value of the second heating resistor.

[0069] In order to improve the heat transfer efficiency of the first heating unit 14 to the portion of the aerosol-forming substrate close to the smoke outlet 12, as an embodiment, Figure 3 As shown, the graphene coating 30 at least covers the wall of the first chamber 111 , and the radial projection of the first electromagnetic induction coil 141 along the first chamber 111 at least partially overlaps with the radial projection of the graphene coating 30 along the first chamber 111 .

[0070] Since the radial projection of the first electromagnetic induction coil 141 along the first chamber 111 at least partially overlaps with the radial projection of the graphene coating 30 along the first chamber 111, the first electromagnetic induction coil 141 can make the cavity wall of the first chamber 111 generate heat well, so that the graphene coating 30 can absorb sufficient heat through the cavity wall of the first chamber 111 and transfer heat to the aerosol forming matrix by thermal radiation, which is beneficial to improve the heat transfer efficiency of the first heating part 14 to the part of the aerosol forming matrix close to the smoke outlet 12.

[0071] In addition, technicians can set the spacing between adjacent turns of the first induction coil to any suitable spacing according to actual needs, and the present disclosure is not limited to this. As an implementation mode, the spacing between adjacent turns of the first electromagnetic induction coil 141 can be 0 mm, that is, the pitch of the first electromagnetic induction coil 141 is equal to the wire diameter (diameter) of the first electromagnetic induction coil 141, so that the first electromagnetic induction coil 141 can generate more magnetic flux.

[0072] Furthermore, technicians may also set the first electromagnetic induction coil 141 to any suitable length along the axial direction of the first chamber 111 according to actual needs. The present disclosure does not limit this. As an embodiment, the axial length e of the first electromagnetic induction coil 141 along the first chamber 111 may be 3 mm to 6 mm, so that the first electromagnetic induction coil 141 can appropriately increase the heating rate of the first electromagnetic induction heating core 142.

[0073] In order to facilitate the assembly of the first electromagnetic induction heating core 142, the second electromagnetic induction heating core 152, the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151, as an implementation method, Figures 2 to 5 As shown, the first heating structure 10 may further include a first coil support 16, the first electromagnetic induction heating core 142 and the second electromagnetic induction heating core 152 are both located in the first coil support 16, and the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151 are wound on the outer surface of the first coil support 16. In other words, the first electromagnetic induction heating core 142, the second electromagnetic induction heating core 152, the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151 may all be installed on the first coil support 16, so that the assembly between the first electromagnetic induction heating core 142, the second electromagnetic induction heating core 152, the first electromagnetic induction coil 141 and the second electromagnetic induction coil 151 can be facilitated.

[0074] In order to further shorten the waiting time for the user to inhale the first aerosol, as an implementation method, Figure 2 and Figure 4As shown, the heater 1 may further include a second heating structure 20, an airflow heating channel 21 being arranged inside the second heating structure 20, the airflow heating channel 21 being connected to the first air inlet 13, and the second heating structure 20 being configured to heat the airflow flowing through the airflow heating channel 21, that is, when the user is inhaling, the airflow may first pass through the airflow heating channel 21 and then enter the heating chamber 11.

[0075] Heating the airflow passing through the airflow heating channel 21 by the second heating structure 20 is helpful to reduce the temperature difference between the first heating structure 10 and the airflow in the heating chamber 11, thereby helping to reduce the heat loss during the heat transfer process of the first heating structure 10 to the aerosol-forming substrate, and further helping to shorten the time required for the aerosol-forming substrate to be heated to generate aerosol, further shortening the time the user needs to wait to inhale the first aerosol.

[0076] The second heating structure 20 may be an electromagnetic heating structure or a resistive heating structure, which is not limited in the present disclosure. As an embodiment, the second heating structure 20 may be an electromagnetic heating structure, such as Figure 2 and Figure 4 As shown, the second heating structure 20 may include a third electromagnetic induction coil 22 and a third electromagnetic induction heating core 23, wherein the third electromagnetic induction coil 22 is located outside the third electromagnetic induction heating core 23 and surrounds the third electromagnetic induction heating core 23, and the airflow heating channel 21 is arranged inside the third electromagnetic induction heating core 23. By energizing the third electromagnetic induction coil 22, a magnetic flux penetrating the third electromagnetic induction heating core 23 may be generated inside the third electromagnetic induction coil 22, thereby causing the third electromagnetic induction heating core 23 to generate heat under the action of electromagnetic induction, and heat the airflow flowing through the airflow heating channel 21.

[0077] As another embodiment, the second heating structure 20 may be a resistive heating structure. The second heating structure 20 may include a third heating resistor, and the airflow heating channel 21 is disposed in the third heating resistor.

[0078] In order to improve the heating effect of the second heating structure 20 on the airflow passing through the airflow heating channel 21, as an implementation method, Figure 6 As shown, the airflow heating channels 21 are provided in a plurality, and the plurality of airflow heating channels 21 are arranged in a honeycomb shape. As another embodiment, Figure 7 As shown, a plurality of partitions 25 are disposed inside the airflow heating channel 21 , and the plurality of partitions 25 divide the airflow heating channel 21 into a plurality of sub-channels.

[0079] By setting up multiple airflow channels, or dividing the airflow heating channel 21 into multiple sub-channels through multiple partitions 25, the heat transfer area between the second heating structure 20 and the airflow flowing through the airflow heating channel 21 can be increased, which is beneficial to improving the heating effect of the second heating structure 20 on the airflow flowing through the airflow heating channel 21.

[0080] In order to realize the connection between the first heating structure 10 and the second heating structure 20, as an implementation method, Figure 2 , Figure 4 and Figure 5 The heater 1 may further include a connecting bracket 40, one end of which is connected to the first heating structure 10, and the other end of the connecting bracket 40 is formed with a slot 41, at least part of the third electromagnetic induction heating core 23 is inserted into the slot 41, and a connecting channel 42 connecting the airflow heating channel 21 and the first air inlet 13 is formed on the connecting bracket 40.

[0081] Since one end of the connecting bracket 40 is connected to the first heating structure 10, and a connecting channel 42 is formed on the connecting bracket 40, the connection between the first heating structure 10 and the second heating structure 20 can be achieved by inserting at least a portion of the third electromagnetic induction heating core 23 into the card slot 41, and the connection between the airflow heating channel 21 and the first air inlet 13 can also be achieved.

[0082] As another implementation, the third electromagnetic induction heating core 23 may also be bonded to the first heating structure 10 , and the airflow heating channel 21 is directly connected to the first air inlet 13 .

[0083] Alternatively, if Figure 2 , Figure 4 and Figure 5 As shown, the heater 1 may further include an air inlet pipe 50, in which an air inlet passage 51 is arranged, one end of the third electromagnetic induction heating core 23 is inserted into the slot 41, and the other end of the third electromagnetic induction heating core 23 is inserted into the air inlet passage 51, and a second air inlet port 511 is formed at one end of the air inlet pipe 50 away from the third electromagnetic induction heating core 23.

[0084] Connecting the air inlet channel 51 to the outside atmosphere through the airflow heating channel 21 is beneficial to reducing the constraints (such as size and position relationship) on the design of the third electromagnetic induction heating core 23 and the aerosol generating device, thereby facilitating a more reasonable design of the aerosol generating device.

[0085] Furthermore, by inserting one end of the third electromagnetic induction heating core 23 into the card slot 41 and inserting the other end of the third electromagnetic induction heating core 23 into the air inlet channel 51, the connection between the connecting bracket 40, the third electromagnetic induction heating core 23 and the air inlet pipe 50 can be achieved, and the connection between the second air inlet 511, the air inlet channel 51, the airflow heating channel 21 and the first air inlet 13 can be achieved, which is convenient for assembly.

[0086] In order to realize the assembly between the third electromagnetic induction coil 22, the third electromagnetic induction heating core 23, the connecting bracket 40 and the air intake pipe 50, as an implementation method, Figure 2 , Figure 4 and Figure 5 As shown, the second heating structure 20 further includes a second coil support 24 , which is sleeved outside at least a portion of the connecting support 40 and at least a portion of the air intake pipe 50 , and the third electromagnetic induction coil 22 is wound on the outer surface of the second coil support 24 .

[0087] Since the second coil bracket 24 is mounted on the outside of at least part of the connecting bracket 40 and at least part of the air inlet pipe 50, the second coil bracket 24 can also protect the connecting parts among the connecting bracket 40, the third electromagnetic induction heating core 23 and the air inlet pipe 50. When the aerosol generating device is dropped or bumped, it helps to avoid the connection bracket 40, the third electromagnetic induction heating core 23 and the air inlet pipe 50 from detaching.

[0088] According to a second aspect of the present disclosure, there is provided an aerosol generating device comprising the above-mentioned heater 1 .

[0089] Optionally, the aerosol generating device may be an electronic cigarette, and the electronic cigarette may include the heater 1 .

[0090] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0092] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A heater for an aerosol-forming substrate, characterized in that include: a first heating structure, wherein a heating cavity for accommodating an aerosol-forming substrate is disposed inside the first heating structure, the first heating structure is configured to heat the aerosol-forming substrate, and the first heating structure is provided with a smoke outlet and a first air inlet both of which are in communication with the heating cavity; A graphene coating is located in the heating chamber and covers at least a portion of a chamber wall of the heating chamber.

2. The heater according to claim 1, characterized in that The graphene coating at least covers the cavity wall of the heating cavity close to the smoke outlet.

3. The heater according to claim 2, characterized in that The ratio of the length of the graphene coating along the axial direction of the heating chamber to the length of the heating chamber along the axial direction of the heating chamber is 1 / 4 to 1 / 2.

4. The heater according to claim 1, characterized in that The graphene coating covers the entire cavity wall of the heating cavity.

5. The heater according to claim 1, characterized in that The infrared radiation emissivity of the graphene coating is 0.9 to 0.

95.

6. The heater according to any one of claims 1 to 5, characterized in that: The first heating structure includes a first heating part and a second heating part, the heating chamber includes a first chamber and a second chamber, the first chamber is arranged in the first heating part, the second chamber is arranged in the second heating part, the smoke outlet is arranged on the first heating part, and the first air inlet is arranged on the second heating part; Wherein, a heating rate of the first heating part can be greater than a heating rate of the second heating part.

7. The heater according to claim 6, characterized in that The first heating part includes a first electromagnetic induction coil and a first electromagnetic induction heating core, the first electromagnetic induction coil is located outside the first electromagnetic induction heating core and surrounds the first electromagnetic induction heating core, the first chamber is arranged in the first electromagnetic induction heating core, and the smoke outlet is arranged on the first electromagnetic induction heating core; The second heating part includes a second electromagnetic induction coil and a second electromagnetic induction heating core, the second electromagnetic induction coil is located outside the second electromagnetic induction heating core and surrounds the second electromagnetic induction heating core, the second chamber is arranged in the second electromagnetic induction heating core, and the first air inlet is arranged on the second electromagnetic induction heating core; The spacing between adjacent turns of the first electromagnetic induction coil is smaller than the spacing between adjacent turns of the second electromagnetic induction coil.

8. The heater according to claim 7, characterized in that The first electromagnetic induction heating core and the second electromagnetic induction heating core are integrally formed.

9. The heater according to claim 7, characterized in that The graphene coating at least covers the cavity wall of the first cavity, and the projection of the first electromagnetic induction coil along the radial direction of the first cavity at least partially overlaps with the projection of the graphene coating along the radial direction of the first cavity.

10. The heater according to claim 7, characterized in that The spacing between adjacent turns of the first electromagnetic induction coil is 0 mm.

11. The heater according to claim 7, characterized in that The length of the first electromagnetic induction coil along the axial direction of the first chamber is 3 mm to 6 mm.

12. The heater according to claim 7, characterized in that The first heating structure also includes a first coil support, the first electromagnetic induction heating core and the second electromagnetic induction heating core are both located in the first coil support, and the first electromagnetic induction coil and the second electromagnetic induction coil are wound on the outer surface of the first coil support.

13. The heater according to claim 1, characterized in that The heater further includes a second heating structure; An airflow heating channel is provided inside the second heating structure, the airflow heating channel is communicated with the first air inlet, and the second heating structure is configured to heat the airflow flowing through the airflow heating channel.

14. The heater according to claim 13, characterized in that The second heating structure includes a third electromagnetic induction coil and a third electromagnetic induction heating core. The third electromagnetic induction coil is located outside the third electromagnetic induction heating core and surrounds the third electromagnetic induction heating core. The airflow heating channel is arranged in the third electromagnetic induction heating core.

15. The heater according to claim 14, characterized in that The heater also includes a connecting bracket, one end of which is connected to the first heating structure, and the other end of the connecting bracket is formed with a slot, at least a portion of the third electromagnetic induction heating core is inserted into the slot, and a connecting channel connecting the airflow heating channel and the first air inlet is formed on the connecting bracket.

16. The heater according to claim 15, characterized in that The heater also includes an air intake pipe, an air intake channel is arranged in the air intake pipe, one end of the third electromagnetic induction heating core is inserted in the card slot, the other end of the third electromagnetic induction heating core is inserted in the air intake channel, and a second air inlet is formed at one end of the air intake pipe away from the third electromagnetic induction heating core.

17. The heater according to claim 16, characterized in that The second heating structure further includes a second coil support, which is sleeved on the outside of at least a portion of the connecting support and at least a portion of the air intake pipe, and the third electromagnetic induction coil is wound on the outer surface of the second coil support.

18. The heater according to any one of claims 13 to 17, characterized in that: The airflow heating channels are provided in a plurality, and the plurality of airflow heating channels are arranged in a honeycomb shape; or, A plurality of partitions are arranged inside the airflow heating channel, and the plurality of partitions divide the airflow heating channel into a plurality of sub-channels.

19. An aerosol generating device, characterized in that: A heater comprising the heater described in any one of claims 1-18.

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