CN220343695U - Aerosol-generating substrate heating assembly and aerosol-generating device - Google Patents

Abstract

The present utility model relates to an aerosol-generating device and an aerosol-generating substrate heating assembly. The pipe wall of heating pipe includes two at least heating areas that can heat, has between the adjacent heating area and hinders the heat interval, hinders the heat interval and is used for preventing the heat conduction of adjacent heating area, reduces the heat transfer rate of different heating areas, and then when the adjacent heating area heating demand is different, the mutual influence is less, and heat loss is few. Meanwhile, the heat-resistant interval is covered by the thermoplastic sealing layer, so that air flow in the heating pipe can be prevented from flowing out through the heat-resistant interval, and heat loss is further reduced.

Description

Aerosol-generating substrate heating assembly and aerosol-generating device

Technical Field

The utility model relates to the technical field of atomization devices, in particular to an aerosol generating device and an aerosol generating substrate heating assembly.

Background

An aerosol-generating device for heating an aerosol-generating substrate typically comprises a heating tube into which, in use, the aerosol-generating substrate is inserted, and through which the aerosol-generating substrate is heated to generate an aerosol. The heating tube is typically required to control the temperature when heating the aerosol-generating substrate so that the aerosol is generated in the non-combusted state in the aerosol-generating substrate. At present, when aerosol is generated by adopting an aerosol generating substrate, the overall heating temperature of a heating pipe in the heating device is higher. In order to conveniently control the heating temperature of the heating pipe, the pipe wall of the heating pipe is generally divided into a plurality of heating areas, and the heating power or the heating time of the different heating areas are different. Because heat conduction between different heating zones is fast through the pipe wall of heating pipe, when the heating zone works, the heat transferred between adjacent heating zones has a great negative influence on the heating requirement of respective zones, and the heat of the part cannot be utilized, so that serious heat loss is caused, for example: when one of the adjacent heating areas works and the other heating area does not work, more heat is transferred from the working heating area to the non-working heating area, the heat transferred to the non-working heating area cannot be utilized, and the heat loss is serious.

Disclosure of Invention

The utility model aims to provide an aerosol-generating substrate heating component, which is used for solving the technical problem of larger heat loss caused by rapid heat transfer between heating areas in the conventional aerosol-generating substrate heating component.

In addition, the utility model also aims to provide an aerosol generating device using the aerosol-generating substrate heating assembly.

According to a first aspect, there is provided in one embodiment an aerosol-generating substrate heating assembly comprising:

the heating tube is used for heating the aerosol-generating substrate, the tube wall of the heating tube comprises at least two heating areas, and each heating area can heat the aerosol-generating substrate; a heat-resistant interval for preventing heat transfer of the adjacent heating areas is arranged between the adjacent heating areas, and penetrates through the pipe wall of the heating pipe in the radial direction of the heating pipe;

and a thermoplastic sealing layer arranged on the heating pipe and covering the heat-blocking interval, and used for preventing the air flow in the heating pipe from flowing out through the heat-blocking interval.

Further, in an embodiment, the thermoplastic sealing layer is a heat shrink tube or a heat shrink film heat shrunk on the heating tube.

Further, in one embodiment, the heating assembly further includes an electric heating element, each heating region corresponds to at least one electric heating element, and the electric heating element is configured to individually heat the corresponding heating region, so that each heating region can independently heat the aerosol-generating substrate inserted into the heating tube.

Still further, in one embodiment, the electrical heating element is located between the thermoplastic sealing layer and the heating tube.

In a further embodiment, the electrical heating element is held in thermally conductive contact with the heating tube by the thermoplastic sealing layer.

Further, in one embodiment, the electric heating element is fixed on the outer surface of the heating tube.

Further, in an embodiment, the electric heating element is located at a side of the thermoplastic sealing layer facing away from the heating tube.

In one embodiment, the heating tube comprises an airflow heating section and a generating rod heating section, the airflow heating section and the generating rod heating section being arranged in an axial direction of the heating tube, the airflow heating section being for heating an airflow into the aerosol-generating substrate; a generating rod stopping structure is arranged in the airflow heating section and used for stopping the generating rod stopping structure from the end surface of the aerosol generating substrate inserted into the heating cavity so as to limit the depth of the aerosol generating substrate inserted into the heating cavity; the heating areas are all arranged on the heating section of the generating rod.

Further, in one embodiment, a heat exchanger is disposed in the airflow heating section, the airflow heating section is in heat-conducting contact with the heat exchanger, and a plurality of airflow channels are disposed in the heat exchanger, and the airflow channels are used for passing airflow to heat the passing airflow.

According to a second aspect, there is provided in one embodiment an aerosol-generating device comprising an aerosol-generating substrate heating assembly and a power supply for supplying power to the aerosol-generating substrate heating assembly, the aerosol-generating substrate heating assembly comprising:

the heating tube is used for heating the aerosol-generating substrate, the tube wall of the heating tube comprises at least two heating areas, and each heating area can heat the aerosol-generating substrate; a heat-resistant interval for preventing heat transfer of the adjacent heating areas is arranged between the adjacent heating areas, and penetrates through the pipe wall of the heating pipe in the radial direction of the heating pipe;

and a thermoplastic sealing layer arranged on the heating pipe and covering the heat-blocking interval, and used for preventing the air flow in the heating pipe from flowing out through the heat-blocking interval.

Further, in an embodiment, the thermoplastic sealing layer is a heat shrink tube or a heat shrink film heat shrunk on the heating tube.

Further, in one embodiment, the heating assembly further includes an electric heating element, each heating region corresponds to at least one electric heating element, and the electric heating element is configured to individually heat the corresponding heating region, so that each heating region can independently heat the aerosol-generating substrate inserted into the heating tube.

Still further, in one embodiment, the electrical heating element is located between the thermoplastic sealing layer and the heating tube.

In a further embodiment, the electrical heating element is held in thermally conductive contact with the heating tube by the thermoplastic sealing layer.

Further, in one embodiment, the electric heating element is fixed on the outer surface of the heating tube.

Further, in an embodiment, the electric heating element is located at a side of the thermoplastic sealing layer facing away from the heating tube.

In one embodiment, the heating tube comprises an airflow heating section and a generating rod heating section, the airflow heating section and the generating rod heating section being arranged in an axial direction of the heating tube, the airflow heating section being for heating an airflow into the aerosol-generating substrate; a generating rod stopping structure is arranged in the airflow heating section and used for stopping the generating rod stopping structure from the end surface of the aerosol generating substrate inserted into the heating cavity so as to limit the depth of the aerosol generating substrate inserted into the heating cavity; the heating areas are all arranged on the heating section of the generating rod.

Further, in one embodiment, a heat exchanger is disposed in the airflow heating section, the airflow heating section is in heat-conducting contact with the heat exchanger, and a plurality of airflow channels are disposed in the heat exchanger, and the airflow channels are used for passing airflow to heat the passing airflow.

According to the aerosol-generating substrate heating assembly of the embodiment, the tube wall of the heating tube comprises at least two heating zones capable of heating, a heat-blocking interval is arranged between the adjacent heating zones and used for preventing heat conduction of the adjacent heating zones, so that heat transfer speeds of different heating zones are reduced, and further when heating requirements of the adjacent heating zones are different, the mutual influence is small, and heat loss is small. Meanwhile, the heat-resistant interval is covered by the thermoplastic sealing layer, so that air flow in the heating pipe can be prevented from flowing out through the heat-resistant interval, and heat loss is further reduced.

Drawings

Fig. 1 is an isometric view of an aerosol-generating device in one embodiment;

fig. 2 is a front view of an aerosol-generating device according to an embodiment;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic diagram of the structure of an aerosol-generating substrate heating assembly according to one embodiment;

FIG. 5 is a schematic view showing the heat-shrinkable seal layer and the heating tube according to an embodiment;

FIG. 6 is a schematic diagram of a heating tube and an electric heating element according to an embodiment;

FIG. 7 is a cross-sectional view of a heat-shrink seal layer and a heating tube in one embodiment;

FIG. 8 is a schematic diagram showing the expanded positions of the heating tube and the electric heating element according to one embodiment;

list of feature names corresponding to reference numerals in the figure: 1. an aerosol-generating substrate; 11. a suction end; 12. an air inlet end; 13. an aerosol-generating segment; 2. heating pipes; 21. a heating chamber; 22. an insertion end; 23. a ventilation end; 24. a heating zone; 25. a heat-blocking interval; 26. an airflow heating section; 27. generating a rod heating section; 3. an electric heating element; 4. a thermoplastic sealing layer; 5. a heat exchanger; 51. an air flow channel; 6. a drainage seat; 61. generating a rod stopping surface; 62. drainage holes; 7. a first heater tube base; 71. a first tube socket hole; 72. a first base; 73. a sheath; 8. a second heating tube base; 81. a second stem hole; 9. annular spacing; 10. a reflective film; 101. a power supply; 102. a housing.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

The aerosol generating device comprises a heating pipe, in order to make the heating mode of the heating pipe more flexible, the heating pipe of some aerosol generating devices at present is provided with an independent heating area, the problem that the generated aerosol temperature is too high can be improved by arranging the independent heating area, but the heat transfer of the adjacent heating area is faster, more heat is transferred to other heating areas through the heating pipe, the part of heat cannot be utilized, even the set heating program is negatively influenced, and the heat loss is serious. In order to solve this problem, this application sets up the heat-resisting interval between adjacent zone of heating, then adopts pyrocondensation heat preservation to cover the heat-resisting interval, prevents that the air current from flowing outwards. This reduces heat transfer between adjacent heating zones by thermal barrier spacing, thereby reducing heat loss.

Referring to fig. 1 to 4, before describing the aerosol-generating substrate heating assembly in detail, an aerosol-generating substrate 1 as a heating object of the heating assembly will be described first, wherein the aerosol-generating substrate 1 is an aerosol-generating rod, one end of the aerosol-generating substrate 1 is a suction end 11 for sucking aerosol, the other end is an air inlet end 12 into which air flow enters, and the air inlet end 12 allows air to enter the aerosol-generating substrate 1 during suction. In one embodiment, the suction end 11 of the aerosol-generating substrate 1 has a filter (not shown). The filter (not shown) may be made of any of a variety of materials that are available in the present or future, such as sponge, tipping paper, etc. The aerosol-generating substrate 1 comprises an aerosol-generating section 13, the aerosol-generating section 13 being for insertion into a heating assembly of an aerosol-generating device. In the aerosol-generating section 13 there is an aerosol-generating substrate for generating an aerosol, which may be an aerosol filament or an aerosol sheet. In one embodiment, the aerosol-generating substrate 1 is a heated non-combustible rod, and the aerosol is generated by heating the aerosol-generating substrate without burning the aerosol-generating substrate.

In some embodiments, referring to fig. 1-4, an aerosol-generating substrate heating assembly comprises a heating tube 2 and a thermoplastic sealing layer 4. In one embodiment, the aerosol-generating substrate heating assembly is used to heat the aerosol-generating substrate 1 and to cause the aerosol-generating substrate to not burn, producing an aerosol.

In some embodiments, the heating tube itself is capable of heating. In still other embodiments, the aerosol-generating substrate heating assembly further comprises an electrical heating element 3 (see fig. 6), the electrical heating element 3 being disposed on the heating tube 2 and in thermal conductive contact with the heating tube 2 to transfer the generated heat to the heating tube 2 for heating the aerosol-generating substrate 1. The electric heating element 3 may be in a number of possible ways, for example the electric heating element 3 may be a resistive coating or a coil of resistive wire; for another example, the electric heating element 3 is a heating film printed on the outer peripheral surface of the heat conducting tube 2, at this time, the electric heating element 3 and the heat conducting tube 2 form a thick film tube together, an insulating layer is arranged outside the heating film, at this time, the heat conducting tube 2 can be a metal tube with better heat conducting performance; for another example, the electric heating element 3 may be embedded in the wall of the heat conducting pipe 2. The electric heating element 3 can be a resistance wire, and the heat conducting tube 2 is made of an insulating heat conducting material, and the periphery of the resistance wire can be coated with an insulating layer, and the heat conducting tube 2 can be made of an electric conducting material; for another example, the electric heating element 3 may be an electric resistance wire wound around the outer wall of the heat conducting tube 2; for another example, the electric heating element 3 is laid on the inner surface of the heat conducting tube 2;

the heat conduction contact in the application includes both direct contact and indirect contact that can transfer heat, and there are multiple modes of indirect contact, for example scribble heat conduction grease between electric heating element and the heating pipe, for example, in order to guarantee safety, add between heating pipe and electric heating element and have the insulating layer.

The heating tube 2 has a heating chamber 21 (see fig. 5) into which the aerosol-generating substrate 1 is inserted to heat the aerosol-generating substrate 1. Specifically, in one embodiment, the two ends of the heating tube 2 are opened, one end of the heating tube 2 is an insertion end 22 into which the aerosol-generating substrate 1 is inserted, and the other end is a ventilation end 23 through which the air flow enters the heating tube 2. In some other embodiments, the heating tube 2 may be in any feasible manner, for example, the heating tube 2 may close the venting end 23 of the above embodiment, where gas enters the heating tube 2 from the insertion end 22, passes through the gap between the heating tube 2 and the aerosol-generating substrate 1, and enters the gas-absorbing end of the aerosol-generating substrate 1; for another example, the aerosol-generating substrate 1 is passed through the heating tube 2, and the suction end of the aerosol-generating substrate 1 extends out of the heating tube 2.

Referring to fig. 5 to 8, the tube wall of the heating tube 2 comprises at least two heating zones 24, each heating zone 24 being capable of heating the aerosol-generating substrate 1 inserted into the heating chamber 21. A heat-resistant gap 25 for preventing heat transfer from the adjacent heating zones 24 is provided between the adjacent heating zones 24, and the heat-resistant gap 25 penetrates through the pipe wall of the heating pipe 2 in the radial direction of the heating pipe 2. The heat-blocking space 25 is transparent in the thickness direction of the tube wall of the heating tube 2, that is, the heat-blocking space is a hollow structure for blocking heat transfer. Heat transfer between adjacent heating zones 24 can be reduced by the thermal barrier 25, reducing heat losses.

In order to prevent the outflow of heated hot air from the heat-resistant compartment 25, a thermoplastic sealing layer 4 is provided on the heating tube 2 and covers the heat-resistant compartment 25 in the present case for preventing the outflow of air flow in the heating tube 2 through the heat-resistant compartment 25. This can further improve the energy utilization rate of each heating region.

The heat-blocking compartment 25 in the aerosol generating substrate heating assembly of the present application can reduce heat transfer from adjacent heating zones 24, while the thermoplastic sealing layer 4 can cover the heat-blocking compartment 25 to prevent airflow from escaping through the heat-blocking compartment 25, reducing heat loss.

In one embodiment, referring to fig. 5 and 8, each heating zone 24 corresponds to at least one electric heating element 3, and the electric heating elements 3 are configured to individually heat the corresponding heating zone 24, so that each heating zone 24 can individually heat the aerosol-generating substrate 1 inserted into the heating chamber 21. When each heating zone 24 is independently heated and operated, heat transfer to the non-operated heating zone can be reduced through the heat-blocking interval 25, heat loss is reduced, and meanwhile, the heating efficiency of the independently heated and operated heating zone 24 is improved.

It should be noted that, in the embodiment, the heating areas 24 on the heating tube 2 can independently heat the aerosol-generating substrate 1, and in practical use, the heating method is not limited to only opening and heating only a part of the heating areas 24 in each heating area 24, and according to practical needs, each heating area 24 can be simultaneously opened and heated, and at this time, the heating tube 2 entirely heats the aerosol-generating substrate 1. For example, one heating strategy for the aerosol-generating substrate 1 is as follows:

when heating the aerosol-generating substrate 1 is started, since a certain amount of moisture is contained in the aerosol-generating substrate 1 and water vapor is contained in the aerosol generated after heating, if the aerosol temperature is too high at this time, the water vapor is liable to burn out when the aerosol is sucked, and therefore, when heating the aerosol-generating substrate 1 is started, only a part of the heating zones 24 are used to heat the aerosol-generating substrate 1, and after the moisture in the aerosol-generating substrate 1 is discharged, the heating zones 24 are simultaneously operated, and the aerosol-generating substrate 1 is heated by the heating pipe 2 as a whole.

As another example, a heating strategy of the aerosol-generating substrate 1 is as follows: each heating zone 24 is divided into two groups, wherein one group of heating zones 24 heats one section of the aerosol-generating substrate 1, then the other section of the aerosol-generating substrate 1 is heated by the other group of heating zones 24, and the two groups of heating zones 24 work in a time-division manner to heat the aerosol-generating substrate 1 in a time-division manner, so that the number of mouths of the aerosol-generating substrate 1 can be prolonged.

In some other embodiments, the heating zones may also operate all the time simultaneously, wherein the heating power of the electric heating element corresponding to one heating zone (i.e., the low-temperature heating zone) of at least one pair of heating zones is smaller than that of the electric heating element corresponding to the other heating zone (i.e., the high-temperature heating zone).

In a specific embodiment, the number of electric heating elements 3 corresponds to the number of heating zones 24. The number of heating zones 24 is two, as are the number of electric heating elements 3. In some other embodiments, the number of heating zones 24 and the number of electric heating elements 3 may be increased as desired, such as by providing more than three heating zones 24. In some other embodiments, one heating zone 24 may correspond to more than two electrical heating elements 3.

The arrangement of the heating zones 24 on the heating tube 2 may take any feasible form, for example, please refer to fig. 6, in which the heating zones 24 are arranged in the circumferential direction of the heating tube 2; for another example, the heating zone 24 may also be arranged in the axial direction of the heating tube 2; for another example, the number of heating zones 24 is four or more, at least two of which are arranged in the circumferential direction of the heating tube 2 and at least two of which are arranged in the axial direction of the heating tube 2.

The heat-blocking spacers 25 may be arranged in any feasible manner, for example, linear heat-blocking spacers 25 may be used; the plurality of heat-blocking intervals 25 may be arranged at intervals, and at this time, the blocking intervals may be not only elongated but also square, circular, or any other shape; curved thermal barrier spacers 25 may also be employed.

Further, referring to fig. 5 and 7, in one embodiment, the thermoplastic sealing layer 4 is a heat-shrinkable tube heat-shrinkable on the heating tube 2. The heat-shrinkable tube sleeve is fixed with the heating tube 2 after being heat-shrinkable on the heating tube 2, and the heat-shrinkable tube has simple heat-shrinkable process. In some other embodiments, the thermoplastic sealing layer 4 may be a thermoplastic film heat shrunk onto the heating tube 2. The thermoplastic film may be specifically any film that is heat resistant and has heat shrinkage properties available in the art, such as PI film, peek film, etc. In one embodiment, the heat-shrinkable sealing layer is made of a material that is resistant to temperatures above 250 ℃, although in some other embodiments the heat resistance requirement may be reduced or increased depending on the temperature change of the aerosol-generating substrate 1 to generate the aerosol.

Further, in an embodiment, referring to fig. 5 and 6, the electric heating element 3 is located between the thermoplastic sealing layer 4 and the heating tube 2. Therefore, after the thermoplastic sealing layer 4 is thermoplastic fixed with the heating pipe 2, the electric heating element 3 has a certain fixing effect, the structural stability of the electric heating element 3 is improved, and the electric heating element 3 is less likely to separate from the heating pipe 2.

Further, referring to fig. 6, the electric heating element 3 is fixed on the outer surface of the heating tube 2, so that the electric heating element 3 is not easily separated from the heating tube 2, and the heat shrinkage of the thermoplastic sealing layer 4 on the heating tube 2 is facilitated. Specifically, the electric heating element 3 is a heating film formed on the outer surface of the heating tube 2, at this time, the electric heating element 3 and the heating tube 2 jointly form a thick film tube, an insulating layer is arranged outside the heating film, and at this time, the heating tube 2 adopts a metal tube with better heat conducting property. In some other embodiments, the electric heating element 3 may be a heating wire embedded in the heating tube 2 or wound around the outer peripheral surface of the heating tube 2.

In some other embodiments, the electrical heating element 3 may be held in heat-conducting contact with the heating tube 2 by thermal shrinkage of the thermoplastic sealing layer 4. At this time, before the thermoplastic sealing layer 4 is formed, the electric heating element 3 is not required to be fixedly connected with the heating tube 2, and the electric heating element 3 and the heating tube 2 are fixed together in the thermal shrinkage process of the thermoplastic sealing layer 4. In some other embodiments, the electric heating element 3 may be located outside the thermoplastic sealing layer 4, i.e. on the side of the thermoplastic sealing layer 4 facing away from the heating tube 2, in which case the aerosol in the heating tube 2 is prevented from contacting the electric heating element 3 and eroding the electric heating element 3, thereby increasing the lifetime of the electric heating element 3.

In one embodiment, referring to fig. 3, 4 and 7, the heating tube 2 comprises an airflow heating section 26 and a generating rod heating section 27, the airflow heating section 26 and the generating rod heating section 27 being arranged in an axial direction of the heating tube 2, the airflow heating section 26 being configured to heat an airflow entering the aerosol-generating substrate 1. A generating rod blocking structure is provided in the airflow heating section 26 for blocking with the end face of the aerosol-generating substrate 1 inserted into the heating chamber 21 to limit the depth of insertion of the aerosol-generating substrate 1 into the heating chamber 21. The heating zones 24 are each located on a generating rod heating section 27. The airflow entering the aerosol-generating substrate 1 is preheated by the airflow heating section 26, so that the inside and the outside of the aerosol-generating substrate 1 are heated, and the overall heating is more uniform.

Further, in an embodiment, referring to fig. 3 and 4, a heat exchanger 5 is disposed in the airflow heating section 26, the airflow heating section 26 is in heat-conducting contact with the heat exchanger 5, and a plurality of airflow channels 51 are disposed in the heat exchanger 5, and the airflow channels 51 provide airflow to heat the airflow passing therethrough. The heat exchanger 5 is used for uniformly heating the air flow, so that the heating efficiency of the air flow is improved.

Specifically, in one embodiment, referring to fig. 3 and 4, the air flow channels 51 of the heat exchanger 5 extend along the axial direction of the heating tube 2, and a plurality of air flow channels 51 are uniformly arranged at intervals. In some other embodiments, the heat exchanger 5 may not be provided, and the air flow is directly heated after passing through the air flow heating section 26.

In order to further improve the uniformity of heating the aerosol-generating substrate 1, please refer to fig. 3 and 4, the generating rod stopping structure is a drainage seat 6 located at one side of the heat exchanger 5, the drainage seat 6 has a generating rod stopping surface 61 for stopping and matching with the aerosol-generating substrate 1, the generating rod stopping surface 61 is located at one side of the drainage seat 6 facing away from the heat exchanger 5, the center of the drainage seat 6 has a drainage hole 62, and the drainage hole 62 is used for guiding airflow to enter the aerosol-generating substrate 1 from the center of the end surface of the aerosol-generating substrate 1. In some other embodiments, annular protrusions may be provided in the heating tube 2 to stop the end face of the aerosol-generating substrate 1; the heat exchanger 5 may also form a generating rod stopper structure, the heat exchanger 5 stopping the end face of the aerosol generating substrate 1.

Specifically, in one embodiment, referring to fig. 3 and 4, the drainage seat 6 and the heat exchanger 5 are both assembled in the heating tube 2 in an interference manner.

To facilitate the installation of the heating tube 2, in one embodiment, please refer to fig. 3 and 4, the aerosol-generating substrate heating assembly comprises a first heating tube holder 7 and a second heating tube holder 8, the heating tube 2 being sandwiched between the first heating tube holder 7 and the second heating tube holder 8, the first heating tube holder 7 having a first tube holder hole 71 through which the aerosol-generating substrate 1 is inserted into the heating cavity 21, the second heating tube holder 8 having a second tube holder hole 81 through which an air flow entering the aerosol-generating substrate 1 passes.

Specifically, in one embodiment, referring to fig. 3 and 4, the insertion end 22 of the heating tube 2 is inserted into the first tube socket 71 and is interference fit with the first tube socket 71, and the ventilation end 23 is inserted into the second tube socket 81 and is interference fit with the second tube socket 81. The first heater stem 7 includes a first stem 72 and a sheath 73, and the first stem 72 and the sheath 73 are integrally formed. One end of the sheath 73 is connected to the first housing 72, and the other end is in interference fit with the second heater tube holder 8. An annular space 9 is formed between the sheath 73 and the heating pipe 2, and the annular space 9 can prevent heat from being transferred to the sheath 73, so that heat overflow is reduced. In order to further reduce heat conduction outwards, the inner wall of the sheath 73 is covered with a reflecting film 10, infrared light can be reflected to the heating pipe 2 through the reflecting film 10, the sheath 73 is reduced in absorbing infrared light, and the temperature of the sheath 73 is reduced.

In addition to this, the heating tube 2 may be assembled in any feasible way, such as the heating tube 2 being directly fixed to the housing of the aerosol-generating device; for another example, the insertion end 22 of the heating tube 2 is fixed to the housing of the aerosol-generating device and the venting end 23 is fixed to the second heater socket 8, without the use of a first heater socket.

In some embodiments of aerosol-generating devices, referring to fig. 1-4, the aerosol-generating device comprises an aerosol-generating substrate heating assembly, a power supply 101 and a housing 102, the aerosol-generating substrate heating assembly being any of the embodiments described above, the power supply 101 powering the aerosol-generating substrate heating assembly. The power supply 101 and aerosol-generating substrate heating assembly are housed in a housing 102. Specifically, the power source 101 is a battery.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (10)

1. An aerosol-generating substrate heating assembly, comprising:

the heating tube is used for heating the aerosol-generating substrate, the tube wall of the heating tube comprises at least two heating areas, and each heating area can heat the aerosol-generating substrate; a heat-resistant interval for preventing heat transfer of the adjacent heating areas is arranged between the adjacent heating areas, and penetrates through the pipe wall of the heating pipe in the radial direction of the heating pipe;

and a thermoplastic sealing layer arranged on the heating pipe and covering the heat-blocking interval, and used for preventing the air flow in the heating pipe from flowing out through the heat-blocking interval.

2. The aerosol-generating substrate heating assembly of claim 1, wherein the thermoplastic sealing layer is a heat shrink tube or film heat shrunk onto the heating tube.

3. The aerosol-generating substrate heating assembly of claim 1, further comprising electrical heating elements, each of the heating elements corresponding to at least one of the electrical heating elements, the electrical heating elements being configured to individually heat the corresponding heating element so that each heating element is capable of independently heating an aerosol-generating substrate inserted into the heating tube.

4. An aerosol-generating substrate heating assembly according to claim 3, wherein the electrical heater is located between the thermoplastic sealing layer and the heating tube.

5. The aerosol-generating substrate heating assembly of claim 4, wherein the electrical heating member is maintained in thermally conductive contact with the heating tube by the thermoplastic sealing layer.

6. The aerosol-generating substrate heating assembly of claim 4, wherein the electrical heating element is secured to an outer surface of the heating tube.

7. An aerosol-generating substrate heating assembly according to claim 3, wherein the electrical heating element is on a side of the thermoplastic sealing layer facing away from the heating tube.

8. An aerosol-generating substrate heating assembly according to claim 1 or 2 or 3, wherein the heating tube comprises an airflow heating section and a generating rod heating section, the airflow heating section and the generating rod heating section being arranged in an axial direction of the heating tube, the airflow heating section being for heating an airflow into the aerosol-generating substrate; the heating pipe is provided with a heating cavity for inserting an aerosol generating substrate to heat the aerosol generating substrate, a generating rod stopping structure is arranged in the airflow heating section and used for stopping the generating rod stopping structure and the end face of the aerosol generating substrate inserted into the heating cavity so as to limit the depth of the aerosol generating substrate inserted into the heating cavity; the heating areas are all arranged on the heating section of the generating rod.

9. The aerosol generating substrate heating assembly of claim 8, wherein a heat exchanger is disposed within the airflow heating section, the airflow heating section in thermal conductive contact with the heat exchanger, the heat exchanger having a plurality of airflow channels therein for passing airflow therethrough to heat the passing airflow.

10. An aerosol-generating device comprising a power supply and an aerosol-generating substrate heating assembly according to any of claims 1 to 9, the power supply supplying power to the aerosol-generating substrate heating assembly.