CN216961502U

CN216961502U - Aerosol generating device

Info

Publication number: CN216961502U
Application number: CN202122894059.8U
Authority: CN
Inventors: 韦国富; 沈友立
Original assignee: Shenzhen ALD Technology Co Ltd
Current assignee: Shenzhen ALD Technology Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-07-15
Anticipated expiration: 2031-11-23

Abstract

The utility model relates to an aerosol generating device, which comprises a main body and an upper cover component, wherein an insertion cavity is formed at the upper end of the main body, and a heating body is arranged at the bottom of the insertion cavity; the upper cover assembly comprises a cover body, an inner support bracket and a heat insulation sleeve, the heat insulation sleeve is sleeved outside the inner support bracket, and a first heat insulation space is formed between the outer circumferential wall of the inner support bracket and the inner circumferential wall of the heat insulation sleeve; a second heat insulation space is formed between the outer peripheral wall of the heat insulation sleeve and the inner peripheral wall of the plug-in cavity. The aerosol generating device of the utility model utilizes the air in the first heat insulation space and the second heat insulation space as the heat insulation medium, thereby reducing the direct transmission of the heat generated by the heating element to the direction of the shell when in work, and ensuring that the temperature of the area of the main shell corresponding to the heating element is not too high to influence the comfort when a user holds the aerosol generating device.

Description

Aerosol generating device

Technical Field

The utility model belongs to the technical field of electronic atomization, and particularly relates to an aerosol generating device.

Background

The heating non-combustible aerosol generating device mainly heats aerosol generating substrates through a heating body to several hundred ℃ to release aerosol particles, and then carries the aerosol out through air flow transportation. The volume of the aerosol generating device is small, the heat in the heat generating body area is concentrated, a large amount of heat is easy to transfer to the shell, the temperature of the corresponding heat generating body area in the shell reaches more than 45 ℃, the temperature exceeds the human body holding comfortable temperature, the energy loss is caused to a certain extent, the power consumption utilization rate is reduced, the battery utilization rate is low, and the endurance time of the device is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention aims to address, at least to some extent, the deficiencies in the prior art and to provide an aerosol generating device.

To achieve the above object, the present invention provides an aerosol generating device comprising:

the heating device comprises a main body, wherein an inserting cavity is formed at the upper end of the main body, and a heating body is arranged at the bottom of the inserting cavity;

the upper cover assembly comprises a cover body, an inner support bracket and a heat insulation sleeve, wherein the upper end of the inner support bracket is connected to the cover body and provided with an accommodating cavity for accommodating aerosol-forming substrates, the lower end of the inner support bracket is provided with a first through hole communicated with the accommodating cavity, and the cover body is provided with an inserting hole correspondingly communicated with the accommodating cavity; the upper end of the heat insulation sleeve is connected to the cover body and sleeved outside the inner support bracket, a first heat insulation space is formed between the outer peripheral wall of the inner support bracket and the inner peripheral wall of the heat insulation sleeve, and a second through hole is formed in the bottom of the heat insulation sleeve corresponding to the first through hole;

the upper cover assembly is detachably mounted to the upper end of the main body, so that the inner support and the heat insulation sleeve extend into the inserting cavity, the upper end of the heating body sequentially passes through the second through hole and the first through hole to extend into the accommodating cavity, and a second heat insulation space is formed between the outer peripheral wall of the heat insulation sleeve and the inner peripheral wall of the inserting cavity.

Optionally, a stop protruding ring is arranged on the outer peripheral wall of the upper end of the inner support bracket, and a first limit step abutting against the lower side of the stop protruding ring is defined on the inner peripheral wall of the heat insulation sleeve, so that the top end of the inner support bracket abuts against and is fixed to the cover body; and the cover body, the inner support bracket and the heat insulation sleeve jointly enclose a third heat insulation space, and the third heat insulation space is positioned above the first heat insulation space.

Optionally, two partitioning parts which are opposite at intervals are integrally formed in the heat insulation sleeve, the two partitioning parts partition an internal space of the heat insulation sleeve into a first heat insulation cavity and two second heat insulation cavities, and the two second heat insulation cavities are located on two opposite sides of the first heat insulation cavity respectively;

the first limiting step is formed at the top end of the first heat insulation cavity, the inner supporting bracket is arranged in the first heat insulation cavity and forms a first heat insulation space together with the inner wall of the first heat insulation cavity, and the first through hole is correspondingly communicated with the first heat insulation cavity.

Optionally, the top of two of the second insulating chambers is open and communicates with the third insulating space.

Optionally, the plane of the bottom wall of the inner support bracket is higher than the plane of the bottom wall of the heat insulation sleeve.

Optionally, an air inlet is defined at a joint between the cover body and the main body, the air inlet is communicated with the second heat insulation space, and a vent hole communicated with the first heat insulation cavity and the second heat insulation space is formed in a side wall of the bottom of the heat insulation sleeve.

Optionally, the bottom wall of the heat insulation sleeve is attached to the bottom of the insertion cavity, the first heat insulation cavity penetrates through the bottom wall of the heat insulation sleeve to form the second through hole, and the second through hole is connected with the vent hole.

Optionally, the main body includes a casing, and a fixing sleeve and a mounting bracket disposed in the casing, wherein a control circuit board and a power supply are respectively fixedly mounted on two opposite sides of the mounting bracket, and the control circuit board is respectively electrically connected with the power supply and the heating element;

the upper end of the fixing sleeve is opened to form the inserting cavity, the lower end of the fixing sleeve is arranged at the top end of the mounting support, a fourth heat insulation space is formed between the mounting support and the fixing sleeve, and the lower end of the heating body is fixed in the fourth heat insulation space through a heat insulation base.

Optionally, a positioning hole is formed in the bottom wall of the fixing sleeve, a second limiting step is formed at the top end of the heat insulation base, and a first protruding structure which abuts against the heat insulation base is formed at the bottom of the fourth heat insulation space in an upward protruding manner, so that the top end of the heat insulation base is fixed in the positioning hole through the second limiting step.

Optionally, a fifth heat insulation space is formed between the inside of the heat insulation base and the heating element.

Optionally, the main body further comprises a metal sleeve sleeved on the fixing sleeve and outside the mounting bracket, and the mounting bracket is provided with a second protruding structure abutting against the top end of the power supply, so that a sixth heat insulation space is formed among the mounting bracket, the power supply and the metal sleeve.

Optionally, a seventh insulating space is formed between the inner peripheral wall of the housing and the inner peripheral wall of the metal sleeve.

Optionally, the side wall of the metal sleeve corresponds to the position of the control circuit board and is provided with an opening, the inner side of the shell is further provided with a graphene radiating fin, the upper end of the graphene radiating fin at least extends to the position corresponding to the top end of the heating body, and the lower end of the graphene radiating fin at least extends to the position corresponding to the bottom end of the opening.

According to the aerosol generating device, a first heat insulation space is formed between the inner support bracket and the heat insulation sleeve, a second heat insulation space is formed between the heat insulation sleeve and the plug cavity, and the second heat insulation space is sleeved outside the first heat insulation space; the air in the first heat insulation space and the air in the second heat insulation space are used as heat insulation media, so that the direct transmission of heat generated by the heating body in the working process to the shell direction is reduced, and the comfort of a user in holding the heating body is not influenced due to the fact that the temperature of the corresponding heating body area of the main body shell is not too high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic exploded view of an aerosol generating device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an aerosol generating device according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic cross-sectional view of another embodiment of an aerosol generating device of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4;

description of the main elements:

10. a cover body; 11. an insertion hole; 12. an air inlet;

20. an inner support bracket; 21. an accommodating cavity; 22. a first through hole; 23. a stop convex ring;

30. a heat insulating sleeve; 31. a second through hole; 32. a first limit step; 33. a first insulating cavity; 34. a second insulating cavity; 35. a vent hole; 36. a partition portion;

40. a heating element; 41. a thermally insulated base; 411. a first bracket; 412. a second bracket;

50. a housing; 51. fixing the sleeve; 511. an insertion cavity; 512. positioning holes; 52. mounting a bracket; 521. a first bump structure; 522. a second bump structure; 53. a metal sleeve; 531. opening the mouth; 54. a graphene heat sink;

60. a control circuit board; 61. a control key; 70. a power supply;

a1, a first insulating space; a2, a second insulating space; a3, a third insulating space; a4, a fourth insulating space; a5, a fifth insulating space; a6, a sixth insulating space; a7, a seventh insulating space.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only and are not to be construed as limiting the present invention, and all other embodiments that can be made by one skilled in the art without inventive effort based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 3, an embodiment of the present invention provides an aerosol generating device, including a main body and an upper cover assembly detachably mounted to an upper end of the main body in an inserting manner; the upper end of the main body is formed with a plug cavity 511, the bottom of the plug cavity 511 is provided with a heating element 40, a control circuit board 60 and a power supply 70 are arranged in the main body, the control circuit board 60 is respectively electrically connected with the power supply 70 and the heating element 40, and is used for controlling the power supply 70 to supply power for the heating element 40.

The upper cover assembly comprises a cover body 10, an inner support bracket 20 and a heat insulation sleeve 30, wherein the upper end of the inner support bracket 20 is connected to the cover body 10 and is provided with a containing cavity 21 for containing aerosol-forming substrates, the lower end of the inner support bracket 20 is provided with a first through hole 22 communicated with the containing cavity 21, and the cover body 10 is provided with an insertion hole 11 correspondingly communicated with the containing cavity 21; the upper end of the heat insulation sleeve 30 is connected to the cover 10 and sleeved outside the inner support bracket 20, a first heat insulation space a1 is formed between the outer circumferential wall of the inner support bracket 20 and the inner circumferential wall of the heat insulation sleeve 30, and a second through hole 31 is formed in the bottom of the heat insulation sleeve 30 corresponding to the first through hole 22.

When the upper cover assembly is inserted into the insertion cavity 511 of the main body, the inner support bracket 20 and the heat insulation sleeve 30 are inserted into the insertion cavity 511, the upper end of the heating element 40 sequentially passes through the second through hole 31 and the first through hole 22 and extends into the receiving cavity 21, and a second heat insulation space a2 is formed between the outer peripheral wall of the heat insulation sleeve 30 and the inner peripheral wall of the insertion cavity 511.

In actual use, an aerosol-forming substrate made of tobacco shreds, tobacco plant particles, plant fragments or tobacco paste and the like is inserted into the accommodation cavity 21 through the insertion hole 11 until the lower end of the aerosol-forming substrate is supported and fixed by the bottom wall of the inner support bracket 20, and the upper end of the heating body 40 is penetrated from the bottom end of the aerosol-forming substrate in the process; before the user performs suction, the control circuit board 60 can control the power supply 70 to supply power to the heating element 40 by pressing the control button 61, so that the heating element 40 heats the contacted aerosol-forming substrate to generate aerosol which can be inhaled by the user.

It should be noted that the aerosol-forming substrate in this embodiment has a cylindrical, elliptical or regular prism-like structure, and correspondingly, the cross-sections of the insertion hole 11 and the receiving cavity 21 are adapted to the cross-section of the aerosol-forming substrate, so that the aerosol-forming substrate can be inserted into the receiving cavity 21 in a detachable manner and clamped and fixed by the inner wall of the receiving cavity 21; after the aerosol is formed and used, the upper cover assembly can be pulled out upwards, the aerosol forming substrate is driven by the inner support bracket 20 to be separated from the heating element 40, and therefore the substances such as tobacco shreds, fragments and the like falling from the aerosol forming substrate are reduced to the inserting cavity 511.

According to the aerosol generating device, the annular first heat insulation space A1 is formed between the inner support bracket 20 and the heat insulation sleeve 30, the annular second heat insulation space A2 is formed between the heat insulation sleeve 30 and the plug cavity 511, and the second heat insulation space A2 is sleeved outside the first heat insulation space A1; air is preferably used in the first heat insulation space a1 and the second heat insulation space a2, and the heat conductivity coefficient (0.026W/(m · K)) of the air is extremely low, so that the aerosol generating device of the embodiment uses the air in the first heat insulation space a1 and the second heat insulation space a2 as a heat insulation medium, thereby reducing the direct transmission of heat generated by the heating element 40 in the operation to the housing direction, and ensuring that the temperature of the region of the main housing corresponding to the heating element 40 is not too high to affect the comfort of the user in holding.

Preferably, because the inner support bracket 20 is close to the heating element 40, the temperature of the inner support bracket 20 after the suction is completed is relatively high, the plane of the bottom wall of the inner support bracket 20 in the aerosol generating device of the present embodiment is higher than the plane of the bottom wall of the heat insulation sleeve 30, that is, the bottom end of the inner support bracket 20 is retracted into the heat insulation sleeve 30, when the upper cover assembly is pulled out from the main body, the inner support bracket 20 in a high temperature state can not be contacted with the human body due to the arrangement of the heat insulation sleeve 30, thereby avoiding the risk of scalding the user. With this structure, the first insulating space a1 is formed to include a portion between the bottom wall of the inner holder 20 and the bottom wall of the insulating sleeve 30, so that the heat transfer from the inside of the inner holder 20 to the main body is reduced, and the electronic components inside the main body are protected.

In one embodiment, the outer peripheral wall of the upper end of the inner bracket 20 is provided with a stop protruding ring 23, and the inner peripheral wall of the heat insulation sleeve 30 defines a first limit step 32 abutting against the lower side of the stop protruding ring 23, so that the top end of the inner bracket 20 abuts against and is fixed on the cover body 10; and the cover 10, the inner bracket 20 and the heat insulation sleeve 30 together enclose a third heat insulation space A3, and the third heat insulation space A3 is located above the first heat insulation space a 1.

Thus, in the present embodiment, the third heat insulation space a3 is provided to greatly reduce the heat transfer from the inner bracket 20 to the lid body 10, so that the temperature of the lid body 10 is not too high, and the situation that the user burns or feels uncomfortable due to the lip contacting the lid body 10 during suction is avoided. Moreover, the structure enables the inner support bracket 20 of the present embodiment to be suspended and fixed in the heat insulation sleeve 30 by the action of the stop protruding ring 23, that is, the inner support bracket 20 is clamped and fixed by the heat insulation sleeve 30 and the cover 10 only by the abutting of the top end of the inner support bracket 20 and the abutting of the stop protruding ring 23 and the first limit step 32, and the other parts of the inner support bracket 20 are respectively in contact with the first heat insulation space a1 and the second heat insulation space a2, so that the direct contact between the inner support bracket 20 and other parts is reduced, and the air is better utilized as a heat insulation medium to block the heat transfer.

In one embodiment, as shown in fig. 4 and 5, two opposite partitions 36 are integrally formed in the heat insulation sleeve 30, the two partitions 36 partition the inner space of the heat insulation sleeve 30 into a first heat insulation chamber 33 and two second heat insulation chambers 34, and the two second heat insulation chambers 34 are respectively located at two opposite sides of the first heat insulation chamber 33; the first limiting step 32 is formed at the top end of the first thermal insulation cavity 33, the inner bracket 20 is disposed in the first thermal insulation cavity 33 and forms a first thermal insulation space a1 together with the inner wall of the first thermal insulation cavity 33, and the first through hole 22 is correspondingly communicated with the first thermal insulation cavity 33.

Preferably, in the present embodiment, the top of the two second insulating chambers 34 are open and are communicated with the third insulating space A3, so that the second insulating chambers 34 are further spaced in the first insulating space a1 and the second insulating space a2, thereby increasing the obstruction of the heat generated by the heating element 40 to the direction of the main body case.

In one embodiment, an air inlet hole 12 is defined at the joint between the cover 10 and the main body, the air inlet hole 12 is communicated with the second insulation space a2, and the bottom side wall of the insulation sleeve 30 is opened with a vent hole 35 communicating the first insulation chamber 33 and the second insulation space a 2. In this embodiment, the number of inlet port 12 includes two at least to locate the relative both sides of device relatively, when the main part was assembled in the upper cover subassembly grafting, can hide inlet port 12 to a certain extent, avoided inlet port 12's setting to influence the whole outward appearance of device.

And because the air inlet hole 12 communicates with the upper end of the second heat insulation space A2, when a user sucks aerosol-forming substrate, the external space enters the second heat insulation space A2 from the air inlet hole 12, flows downwards and enters the first heat insulation space A1 through the vent hole 35, then enters the aerosol-forming substrate through the first through hole 22, is mixed with the generated aerosol and then is sucked by the user, meanwhile, the heat in the first heat insulation space A1 and the second heat insulation space A2 is effectively taken away, the temperature of the main body shell can be effectively reduced, the energy utilization rate is improved, and the endurance time of the device is prolonged. In this embodiment, the second through-hole 31 may function as a ventilation means without providing the ventilation hole 35, and the air that has entered the second insulation space a2 may enter the first insulation space a1 through the second through-hole 31 and then enter the aerosol-forming substrate through the first through-hole 22. Of course, in other embodiments, one or more air inlets communicating with the receiving cavity 21 may be formed on the bottom or the side wall of the inner bracket 20.

Preferably, in this embodiment, the bottom wall of the heat insulation sleeve 30 is attached to the bottom of the insertion cavity 511, so as to form a first heat insulation space a1 and a second heat insulation space a2 distributed from inside to outside, and further prevent the heat generated by the heating element 40 from being transferred to the main body shell direction, in this embodiment, the first heat insulation cavity 33 penetrates through the bottom wall of the heat insulation sleeve 30 to form a second through hole 31, and the second through hole 31 is connected to the vent hole 35; the outside air thus entering the second insulating space a2 can enter the first insulating space a1 through the vent holes 35 in the bottom of the insulating sleeve 30 and then pass from the first through-going holes 22 into the interior of the aerosol-forming substrate.

In one embodiment, the main body includes a housing 50 (i.e., the above-mentioned outer shell), and a fixing sleeve 51 and a mounting bracket 52 disposed in the housing 50, the control circuit board 60 and the power supply 70 being respectively fixedly mounted on opposite sides of the mounting bracket 52; the upper end of the fixing sleeve 51 is opened to form a plug-in cavity 511, the lower end is arranged at the top end of the mounting bracket 52, a fourth heat insulation space A4 is formed between the fixing sleeve and the mounting bracket 52, and the lower end of the heating element 40 is fixed in the fourth heat insulation space A4 through a heat insulation base 41.

In this way, the fourth heat insulating space a4 blocks the heat generated by the heat generating element 40 from being transferred to the control circuit board 60 and the power supply 70. In this embodiment, the heat insulation base 41 includes a first support 411 and a second support 412 that are fixed in cooperation with each other and form a fifth heat insulation space a5, the first support 411 and the second support 412 are respectively provided with a first abutting portion and a second abutting portion in a protruding manner, and the first abutting portion and the second abutting portion clamp and fix the lower end of the heating element 40 in the fifth heat insulation space a 5.

Preferably, the bottom wall of the fixing sleeve 51 is provided with a positioning hole 512, the top end of the heat insulation base 41 is provided with a second limiting step, in this embodiment, the second limiting step is formed at the top end of the first bracket 411, and the bottom of the fourth heat insulation space a4 protrudes upward to form a first protruding structure 521 abutting against the heat insulation base 41, so that the top end of the heat insulation base 41 is fixed in the positioning hole 512 through the second limiting step. In this way, the embodiment uses the first protrusion 521 to separate the heat insulation base 41 from the bottom of the fourth heat insulation space a4, and fix the heat insulation base 41 in the fourth heat insulation space a4, so as to reduce the contact area between the heat insulation base 41 and the bottom wall of the fourth heat insulation space a4, thereby reducing the heat generated by the heat generating body 40 from being transferred to the control circuit board 60 and the power supply 70.

In one embodiment, the main body further includes a metal sleeve 53 disposed around the fixing sleeve 51 and the mounting bracket 52, and the mounting bracket 52 is provided with a second protrusion 522 abutting against a top end of the power supply 70, so that a sixth thermal insulation space a6 is formed between the mounting bracket 52, the power supply 70 and the metal sleeve 53.

Specifically, the mounting bracket 52 of the present embodiment is provided with a mounting groove at one side below the fourth thermal insulation space a4, and the second protrusion 522 is formed by protruding the top wall of the mounting groove downward, so that the top end of the power supply 70 is separated from the top wall of the mounting groove by the second protrusion 522, and the contact area between the power supply 70 and the mounting bracket 52 is reduced to reduce the heat transferred from the mounting bracket 52 to the power supply 70, that is, the heat absorbed by the power supply 70 is reduced by the sixth thermal insulation space a 6.

Preferably, a seventh heat insulation space a7 is formed between the inner peripheral wall of the casing 50 and the inner peripheral wall of the metal sleeve 53, and in this embodiment, the metal sleeve 53 may be made of high heat dissipation metal such as aluminum or copper, so that the metal sleeve 53 is used to absorb the heat generated in the region of the heating element 40 and quickly transmit the heat to other regions of the main body for heat dissipation, and then the seventh heat insulation space a7 is used to make the surface temperature of the casing 50 within a required range.

Further, an opening 531 is formed in a position, corresponding to the control circuit board 60, of the side wall of the metal sleeve 53, a graphene heat sink 54 is further attached to the inner side of the casing 50, an upper end of the graphene heat sink 54 at least extends to a position corresponding to the top end of the heating element 40, and a lower end of the graphene heat sink 54 at least extends to a position corresponding to the bottom end of the opening 531.

That is to say, the graphene heat dissipation sheet 54 is a supplement to the metal sleeve with the opening 531, which results in insufficient heat dissipation in the area of the control circuit board 60, so that the heat in the area of the heating element 40 is absorbed through the matching of the graphene heat dissipation sheet 54 and the metal sleeve 53 and is quickly diffused to various positions of the whole main body for heat dissipation, thereby ensuring that the surface temperature of the housing 50 is not too high, which causes scalding of hands.

In summary, the aerosol generating device of the present invention defines a first thermal insulation space a1, a second thermal insulation space a2, a third thermal insulation space A3, and a seventh thermal insulation space a7 radially outward with the region of the heating element 40 as a center, and defines a fourth thermal insulation space a4, a fifth thermal insulation space a5, and a sixth thermal insulation space a6 axially toward the power supply 70 and the control circuit board 60, so that the seven thermal insulation spaces are utilized to perform air thermal insulation to block the transfer of heat generated by the heating element 40, and the heat is uniformly dispersed to various positions of the entire device to dissipate heat in cooperation with the uniform heating action of the metal sleeve 53 and the graphene heat dissipation sheet 54, so as to avoid the surface temperature of the region of the case 50 corresponding to the heating element 40 from being too high.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In view of the above description of the technical solutions provided by the present invention, those skilled in the art will recognize that there may be variations in the technical solutions and the application ranges according to the concepts of the embodiments of the present invention, and in summary, the content of the present specification should not be construed as limiting the present invention.

Claims

1. An aerosol generating device, comprising:

the upper cover assembly comprises a cover body, an inner support bracket and a heat insulation sleeve, wherein the upper end of the inner support bracket is connected to the cover body and is provided with an accommodating cavity for accommodating aerosol-forming substrates, the lower end of the inner support bracket is provided with a first through hole communicated with the accommodating cavity, and the cover body is provided with an inserting hole correspondingly communicated with the accommodating cavity; the upper end of the heat insulation sleeve is connected to the cover body and sleeved outside the inner support bracket, a first heat insulation space is formed between the outer peripheral wall of the inner support bracket and the inner peripheral wall of the heat insulation sleeve, and a second through hole is formed in the bottom of the heat insulation sleeve corresponding to the first through hole;

2. The aerosol generating device according to claim 1, wherein the outer peripheral wall of the upper end of the inner support bracket is provided with a stop convex ring, and the inner peripheral wall of the heat insulation sleeve is defined with a first limit step abutting against the lower side of the stop convex ring, so that the top end of the inner support bracket abuts against and is fixed on the cover body; and the cover body, the inner support bracket and the heat insulation sleeve jointly enclose a third heat insulation space, and the third heat insulation space is positioned above the first heat insulation space.

3. An aerosol generating device according to claim 2, wherein the heat insulating sleeve has two spaced apart partitions integrally formed therein, the partitions dividing the interior space of the heat insulating sleeve into a first heat insulating chamber and two second heat insulating chambers, the two second heat insulating chambers being respectively located on opposite sides of the first heat insulating chamber;

4. An aerosol generating device according to claim 3, wherein the two second insulating chambers are open at the top and communicate with the third insulating space.

5. An aerosol generating device according to claim 2, wherein the plane of the bottom wall of the inner support bracket is higher than the plane of the bottom wall of the insulating sleeve.

6. The aerosol generating device as recited in claim 3, wherein a joint between the cover and the main body defines an air inlet hole, the air inlet hole is communicated with the second insulating space, and a bottom side wall of the insulating sleeve is provided with a vent hole communicating the first insulating cavity and the second insulating space.

7. The aerosol generating device as claimed in claim 6, wherein the bottom wall of the heat insulating sleeve is attached to the bottom of the insertion cavity, the first heat insulating cavity penetrates through the bottom wall of the heat insulating sleeve to form the second through hole, and the second through hole is connected with the vent hole.

8. The aerosol generating device according to claim 1, wherein the main body comprises a housing, and a fixing sleeve and a mounting bracket which are arranged in the housing, wherein a control circuit board and a power supply source are respectively fixedly arranged on two opposite sides of the mounting bracket, and the control circuit board is respectively electrically connected with the power supply source and the heating body;

9. The aerosol generating device of claim 8, wherein the bottom wall of the fixing sleeve is provided with a positioning hole, a second limiting step is formed at the top end of the heat insulation base, and a first protruding structure abutting against the heat insulation base is formed at the bottom of the fourth heat insulation space in an upward protruding manner, so that the top end of the heat insulation base is fixed in the positioning hole through the second limiting step.

10. An aerosol generating device according to claim 8 or 9, wherein a fifth insulating space is formed between the inside of the heat insulating base and the heat generating body.

11. The aerosol generating device of claim 8, wherein the main body further comprises a metal sleeve sleeved outside the fixing sleeve and the mounting bracket, and the mounting bracket is provided with a second protrusion structure abutting against the top end of the power supply, so that a sixth heat insulation space is formed among the mounting bracket, the power supply and the metal sleeve.

12. An aerosol generating device according to claim 11, wherein a seventh insulating space is formed between the inner peripheral wall of the housing and the inner peripheral wall of the metal sleeve.

13. The aerosol generating device according to claim 11, wherein an opening is formed in a position of the side wall of the metal sleeve corresponding to the control circuit board, a graphene heat sink is attached to the inner side of the housing, an upper end of the graphene heat sink at least extends to a position corresponding to a top end of the heating element, and a lower end of the graphene heat sink at least extends to a position corresponding to a bottom end of the opening.