CN220044932U - Aerosol generating device and heating structure - Google Patents

Abstract

The utility model relates to an aerosol generating device and a heating structure, wherein the heating structure comprises a sleeve and a heating body which is at least partially arranged at intervals with the sleeve, the heating body comprises a heating matrix which generates heat in an electrified state, and an infrared radiation layer which is arranged on the outer surface of the heating matrix and used for radiating infrared light waves; the sleeve is used for allowing the infrared light wave to penetrate; the heating body is at least partially bent and provided with a first free end and a second free end, the sleeve is provided with two end parts distributed along the axis direction, and the first free end and the second free end are led out from the same end part of the sleeve. The heating structure is characterized in that the heating body is at least partially bent, the first free end and the second free end of the heating body can be led out from the same end part of the sleeve, so that the assembling process of the heating structure can be simplified, and the assembling cost is saved.

Description

Aerosol generating device and heating structure

Technical Field

The utility model relates to the field of heating non-combustion atomization, in particular to an aerosol generating device and a heating structure.

Background

In the field of HNB (heating non-combustion) atomization, a heating system such as central heating or peripheral heating is generally adopted, and it is common practice that a heating element is energized to generate heat and then the heat is directly transferred to a medium such as an aerosol-forming substrate by heat conduction, and the medium is generally atomized at a temperature of 350 ℃. The disadvantage of this heating method is that the heat-generating body directly or indirectly conducts heat to the aerosol-forming substrate or other medium through the solid material, which requires that the working temperature of the heat-generating body cannot be too high, otherwise the medium will be over-burned to affect the smoking taste of the electronic cigarette.

In the related art, there is a heating structure heated by generating infrared light wave, the working temperature of the heating body can reach about 400 ℃, but the conductive part of the heating structure is led into the heating structure sleeve from the base to be connected with the heating body, the assembly process is complex, and in addition, the heating body structure with the highest working temperature higher than 400 ℃ is not researched temporarily.

Disclosure of Invention

The utility model aims to provide an improved aerosol generating device and a heating structure.

The technical scheme adopted for solving the technical problems is as follows: the heating structure comprises a sleeve and a heating body which is at least partially arranged at intervals with the sleeve, wherein the heating body comprises a heating matrix which generates heat in an electrified state and an infrared radiation layer which is arranged on the outer surface of the heating matrix and used for radiating infrared light waves; the sleeve is used for allowing the infrared light wave to penetrate; the heating body is at least partially bent and provided with a first free end and a second free end, the sleeve is provided with two end parts distributed along the axis direction, and the first free end and the second free end are led out from the same end part of the sleeve.

In some embodiments, the heating element comprises a plurality of bending sections, and the bending sections are arranged at intervals.

In some embodiments, the plurality of bending sections are equally spaced.

In some embodiments, the bending sections are distributed in a dense-sparse phase.

In some embodiments, the bending sections are distributed in a sparse-dense manner.

In some embodiments, the plurality of bending sections are densely distributed and then sparsely distributed.

In some embodiments, the plurality of bending sections are distributed in a dense and sparse manner.

In some embodiments, the plurality of bending sections are densely and sparsely distributed.

In some embodiments, the heat generating body includes a first heat generating portion and a second heat generating portion;

the first heating part is wound outside the second heating part.

In some embodiments, the second heat generating portion is linear;

the first heating part comprises at least one bending section.

In some embodiments, the first free end is disposed at one end of the first heat generating portion for forming a conductive portion; the second free end is arranged at one end of the second heating part and is used for forming another conductive part.

In some embodiments, the first heat generating portion and the second heat generating portion are of a split structure.

In some embodiments, the first heat generating portion and the second heat generating portion are of unitary construction.

In some embodiments, the first heat generating portion and the second heat generating portion are provided in an insulating manner;

and/or the first free end and the second free end are arranged in an insulating manner.

In some embodiments, the outer wall of the first heat generating portion and/or the second heat generating portion is provided with an insulating structure.

In some embodiments, the insulating structure comprises an air gap, or an insulating layer applied to an outer surface of the first heat generating portion and/or the second heat generating portion.

In some embodiments, the insulating structure includes an oxide layer formed on an outer surface thereof by heat treatment of a heat generating substrate of the first heat generating portion and/or the second heat generating portion.

In some embodiments, the heater has a diameter of 0.05-0.7mm.

In some embodiments, the resistivity of the heater is 0.8-1.6 Ω mm2/m.

In some embodiments, the sleeve is hollow and tubular, and a first accommodating cavity for accommodating the heating element is formed inside the sleeve, and the heating element is arranged at intervals with the inner wall of the first accommodating cavity.

In some embodiments, the heating elements are arranged at intervals on the periphery of the sleeve, and the interior of the sleeve is hollow and forms a second accommodating cavity for accommodating aerosol media.

In some embodiments, the sleeve comprises a first tube body for light wave transmission and a second tube body sleeved on the periphery of the first tube body;

a space is reserved between the second pipe body and the first pipe body, and a first accommodating cavity for accommodating the heating element is formed in the space;

the heating body is arranged on the periphery of the first pipe body and is arranged at intervals with the first pipe body.

In some embodiments, one end of the sleeve is provided with an opening, from which the first free end and the second free end both lead out to the outside of the sleeve.

In some embodiments, the whole heating body is arranged at intervals with the wall of the sleeve.

In some embodiments, the heater is disposed in no direct contact with the sleeve.

In some embodiments, the thickness of the sleeve wall is 0.15mm-0.6mm.

In some embodiments, the distance between the wall of the sleeve and the heating element is 0.05mm-1mm.

The utility model also constructs an aerosol generating device comprising the heating structure.

The aerosol generating device and the heating structure have the following beneficial effects: the heating structure is characterized in that the heating body is at least partially bent, the first free end and the second free end of the heating body can be led out from the same end part of the sleeve, so that the assembling process of the heating structure can be simplified, and the assembling cost is saved.

In addition, the heating matrix of the heating element generates heat in the electrified state, the heat can excite the infrared radiation layer to radiate infrared light waves, the infrared light waves can penetrate through the sleeve to the aerosol forming medium and heat the aerosol forming medium, and when the highest working temperature of the heating element reaches more than 500 ℃ and even more than 1000 ℃ (the highest working temperature of the traditional HNB heating element is generally about 400 ℃), the overburning of the aerosol forming medium can not be caused, and the suction taste can be greatly improved; meanwhile, the preheating time is greatly reduced, and the experience of consumers is greatly improved. The highest working temperature of the heating element is 500-1300 ℃, which is far higher than that of the heating element in the prior art.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic structural view of an aerosol-generating device according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of a heat generating structure of the aerosol generating device of FIG. 1;

FIG. 3 is a cross-sectional view of the heat generating structure shown in FIG. 2;

FIG. 4 is an exploded schematic view of the heat generating structure of FIG. 2;

FIG. 5 is a schematic diagram of a heat-generating body of the heat-generating structure shown in FIG. 4;

FIG. 6 is a transverse cross-sectional view of the heat-generating body shown in FIG. 5;

FIG. 7 is a transverse cross-sectional view of a heat-generating body of an aerosol-generating device in a second embodiment of the utility model;

FIG. 8 is a transverse cross-sectional view of a heat-generating body of an aerosol-generating device in a third embodiment of the utility model;

fig. 9 is a schematic structural view of a heat generating structure of an aerosol generating device according to a fourth embodiment of the present utility model;

FIG. 10 is a schematic view of another angular configuration of the heat generating structure of FIG. 9;

FIG. 11 is a cross-sectional view of the heat generating structure shown in FIG. 9;

FIG. 12 is an exploded schematic view of the heat generating structure of FIG. 9;

fig. 13 is a schematic structural view of a heat generating portion of an aerosol generating device in a fifth embodiment of the present utility model;

fig. 14 is a schematic structural view of a heat generating portion of an aerosol generating device in a sixth embodiment of the present utility model;

fig. 15 is a schematic structural view of a heat generating portion of an aerosol generating device in a seventh embodiment of the present utility model;

fig. 16 is a schematic structural view of a heat generating portion of an aerosol generating device in an eighth embodiment of the present utility model;

fig. 17 is a schematic structural view of a heat generating portion of an aerosol generating device in a ninth embodiment of the present utility model;

fig. 18 is a schematic structural view of a heat generating body of an aerosol-generating device in a tenth embodiment of the utility model;

fig. 19 is a schematic structural view of a heat generating body of an aerosol-generating device in an eleventh embodiment of the utility model;

fig. 20 is a schematic structural view of a heat generating body of an aerosol-generating device in a twelfth embodiment of the utility model;

FIG. 21 is a schematic exploded view of the heat-generating body shown in FIG. 20;

fig. 22 is a schematic structural view of a heat generating body of an aerosol-generating device in a thirteenth embodiment of the utility model;

fig. 23 is a sectional view of a heat generating structure of an aerosol generating device in a fourteenth embodiment of the present utility model;

fig. 24 is a schematic exploded view of the heat generating structure of the aerosol generating device of fig. 23;

fig. 25 is a sectional view of a heat generating structure of an aerosol generating device in a fifteenth embodiment of the present utility model;

fig. 26 is a schematic exploded view of the heat generating structure of the aerosol generating device shown in fig. 25.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.

Fig. 1 shows a first embodiment of the aerosol-generating device of the utility model. The aerosol generating device 100 can heat the aerosol forming substrate 200 by adopting a low-temperature heating non-combustion mode, and has good atomization stability and good atomization taste. In some embodiments, the aerosol-forming substrate 200 may be removably disposed on the aerosol-generating device 100, the aerosol-forming substrate 200 may be cylindrical, in particular, the aerosol-forming substrate 200 may be a strip-shaped or sheet-shaped solid material made of leaves and/or stems of plants, and aroma components may be further added to the solid material.

As shown in fig. 2 and 3, further, in the present embodiment, the aerosol generating device 100 includes a heat generating structure 11 and a power supply assembly 20, wherein the heat generating structure 11 may be partially inserted into the aerosol-forming substrate 200, specifically, a portion thereof may be inserted into a medium section of the aerosol-forming substrate 200, and in an energized state, infrared light waves are generated to heat the medium section of the aerosol-forming substrate 200, so as to atomize and generate aerosol. The heating structure 11 has the advantages of simple structure, high atomization efficiency, strong stability and long service life. The power supply assembly 20 is used for supplying power to the heat generating structure 11. Specifically, in some embodiments, the heat generating structure 11 is removably mounted in the housing of the power supply assembly 20 and can be mechanically and/or electrically connected to a power source in the power supply assembly 20. The heating structure 11 can be detachably arranged in the shell of the power supply assembly 20, so that the heating structure 11 can be replaced conveniently.

As shown in fig. 3 and 4, in the present embodiment, the heat generating structure 11 includes a sleeve 111, a heat generating body 112, and a base 113. The sleeve 111 is covered on at least part of the heating element 112, and can allow light waves to penetrate into the aerosol-forming substrate 200, specifically, in this embodiment, the sleeve 111 can allow infrared light waves to penetrate through, so that the heating element 112 can radiate heat to heat the aerosol-forming substrate 200, and the heating element 112 and the tube wall are arranged at intervals. The base 113 is disposed at the opening 1110 of the sleeve 111 for securing the tube or sealing the opening 1110 of the sleeve 111. The highest working temperature of the heating element is 500-1300 ℃, which is far higher than that of the heating element in the prior art, thus greatly improving the suction taste and greatly shortening the preheating time.

In this embodiment, the sleeve 111 may be a quartz glass tube. Of course, it will be appreciated that in other embodiments, the sleeve 111 is not limited to a quartz tube, and may be other window materials transparent to light waves, such as infrared-transparent glass, transparent ceramics, diamond, and the like.

In the present embodiment, the sleeve 111 is hollow and tubular, and has two ends distributed in the axial direction, and specifically, the sleeve 111 includes a tubular body 1111 having a circular cross section, and a peak structure 1112 provided at one end of the tubular body 1111. Of course, it will be appreciated that in other embodiments, the cross-section of the tubular body 111 is not limited to being circular. The tubular body 1111 has a hollow structure with an opening 1110 at one end. The pointed structure 1112 is disposed at an end of the tubular body 1111 away from the opening 1110, so that at least a portion of the heating structure 111 is conveniently inserted into the aerosol-forming substrate 200 by disposing the pointed structure 1112. In this embodiment, a first accommodating cavity 1113 is formed inside the sleeve 111, and the first accommodating cavity 1113 is a cylindrical cavity. In other embodiments, the heating element 112 may be disposed at intervals on the outer circumference of the sleeve 111, and the inner side of the sleeve 111 may form a second accommodating cavity for accommodating the aerosol-forming substrate 200.

In this embodiment, the wall of the sleeve 111 is spaced from the entire heating element 112, and an air space 1114 is reserved between the inner wall of the sleeve 111 and the heating element 112, and the air space 1114 can be filled with air, however, it will be understood that in other embodiments, the air space 1114 can be filled with a reducing gas or an inert gas. By providing the air space 1114, direct contact between the sleeve 111 and the heating element 112 can be avoided. In some embodiments, the heating element 112 may be partially spaced from the wall of the sleeve 111, specifically, the radial dimension of a portion of the heating element 1120 may be greater than the radial dimension of another portion, the radial dimension of a portion of the heating element 1120 may be equal to the inner diameter of the sleeve 111, and thus may play a role in limiting, although it is understood that, in some embodiments, the inner side of the wall 111 may partially protrude toward the heating element 112 to contact the heating element 112, thereby playing a role in limiting. Of course, it will be appreciated that in other embodiments, the heat-generating body 112 or the wall of the sleeve 111 may be provided with a separation positioning structure, so that the heat-generating body 112 may not directly contact the wall of the sleeve 111, such as sleeving a ceramic ring on a portion of the heat-generating body 112. The air gap mentioned above may also refer to a gap into which air may enter, and does not necessarily mean that air or other gas exists, and the vacuum state is also a form of air gap.

The temperature at which the entire heat generating structure 11 heats the aerosol-forming substrate 200 can be further set by setting the wall thickness and the distance between the heat generating body 112 and the wall. At the same temperature, the overall irradiance may be in a decreasing trend as the thickness of the tube wall increases. Alternatively, in some embodiments, the thickness of the wall of the sleeve 111 is 0.15mm-0.6mm. In some embodiments, the temperature of the heat-generating structure 11 may be gradually decreased as the distance between the heat-generating body 112 and the tube wall increases, and preferably, in some embodiments, the distance between the tube wall of the sleeve 111 and the heat-generating body 12 may be 0.05mm-1mm.

As shown in fig. 5 and 6, in the present embodiment, the heating element 112 may be one heating element and may be disposed lengthwise, and has a first free end 112d and a second free end 112e, and the first free end 112d and the second free end 112e may be led out from the same end of the sleeve 111. In this embodiment, the heat generating body 112 is a strip having a circular cross section. The heating element 112 is at least partially bent and arranged to form a columnar heating portion 1120, and specifically, it may be bent to form a heating portion 1120 of a single spiral columnar structure. It will be appreciated that in other embodiments, the heater 112 is not limited to being strip-shaped, and may be in the form of a longitudinal sheet or mesh. The heat generating portion 1120 is not limited to be columnar, and may be plate-like, strip-like, or mesh-like. In other embodiments, the heater 112 may be wound to form a double helix, M-shaped, N-shaped, or other shaped configuration. Of course, it will be understood that in other embodiments, the number of the heating elements 112 is not limited to one, and may be two, or more than two, and when the number of the heating elements 112 is two, one ends of the two heating elements 112 may be connected to each other, and the other ends (the unconnected ends) form free ends; that is, the free ends of the two heating elements 112 are correspondingly formed with a first free end 112d and a second free end 112e. The shape of the heat-generating body 112 is not limited to being cylindrical, and in some embodiments, the shape of the heat-generating body 112 may be sheet-like.

In the present embodiment, an electrically conductive portion 1121 is provided at one end of the heat generating portion 1120, and the electrically conductive portion 1121 is connected to the heat generating portion 1120, can be led out from one end of the sleeve 111, and is electrically connected to the power supply assembly 20 by being led out from the base 113. The number of the conductive parts 1121 may be two, and the two conductive parts 1121 may be disposed at intervals, and connected to the heat generating parts 1120, respectively, and each may be disposed so as to draw out the sleeve 111 from the end of the sleeve 111 having the opening 1110. In the present embodiment, the first free end 112d and the second free end 112e of the heating element 112 may form two conductive portions 1121, respectively, that is, the first free end 112d of the first heating element 112a forms one of the conductive portions 1121; the second free end 112e of the second heat generating portion 112b forms another conductive portion 1121, and the heat generating portion 1120 may be integrally formed with the conductive portion 1121. Of course, it is understood that in other embodiments, the conductive portion 1121 can be fixed to the first free end 112d and the second free end 112e by welding and formed as a unitary structure with the heat generating portion 1120. The conductive portion 1121 may be a lead wire, which may be soldered with the heat generating portion 1120. Of course, it is understood that in other embodiments, the conductive portion 1121 is not limited to be a lead, and may be other conductive structures. The first free end 112d and the second free end 112e (i.e., the two conductive portions 1121) are led out from the same end portion of the sleeve 111, so that the assembly of the entire heat generating structure 11 is facilitated, the assembly process is simplified, and the heat generating structure 11 can be mounted on a support base and then contacted with an electrode located in the support base during the assembly.

In this embodiment, the heat generating body 112 includes a heat generating base 1122 and an infrared radiation layer 1124. The heat generating body 1122 can generate heat in an energized state. The infrared radiation layer 1124 is disposed on the outer surface of the heat generating substrate 1122. The heat generating substrate 1122 can excite the infrared radiation layer 1124 to generate infrared light waves and radiate the infrared light waves in an energized and heated state. In the present embodiment, the heat generating body 1122 and the infrared radiation layer 1124 are concentrically arranged in the cross section of the heat generating portion 1120.

In this embodiment, the heat generating base 1122 may have a cylindrical shape as a whole, and specifically, the heat generating base 1122 may be a heating wire. Of course, it is understood that in other embodiments, the heat generating substrate 1122 may not be limited to being cylindrical, and may be sheet-like, i.e., the heat generating substrate 1122 may be a heat generating sheet. The heat generating substrate 1122 includes a metal substrate, which may be a wire, having high temperature oxidation resistance. Specifically, the heating matrix 1122 may be a metal material with good high-temperature oxidation resistance, high stability, and difficult deformation, such as a nichrome matrix (e.g., nichrome wire) or an iron-chromium-aluminum alloy matrix (e.g., iron-chromium-aluminum alloy wire). In this embodiment, the radial dimension of the heat generating substrate 1122 may be 0.15mm to 0.8mm.

In the present embodiment, the heat-generating body 112 further includes an oxidation resistant layer 1123, the oxidation resistant layer 1123 being formed between the heat-generating base 1122 and the infrared radiation layer 1124. Specifically, the oxidation resistant layer 1123 may be an oxide film, and the heat generating substrate 1122 is subjected to a high temperature heat treatment to form a dense oxide film on its own surface, and the oxide film forms the oxidation resistant layer 1123. Of course, it is understood that in other embodiments, the oxidation resistant layer 1123 is not limited to include a self-formed oxide film, and in other embodiments, it may be an oxidation resistant coating applied to the outer surface of the heat-generating substrate 1122. By forming the antioxidation layer 1123, the heating substrate 1122 is prevented from being heated or rarely oxidized in the air environment, the stability of the heating substrate 1122 is improved, and further, the first accommodating cavity 1113 is not required to be vacuumized, filled with inert gas or reducing gas, the assembly process of the whole heating structure 11 is simplified, and the manufacturing cost is saved. In this embodiment, the thickness of the oxidation resistant layer 1123 may be selected to be 1um to 150um. When the thickness of the oxidation preventing layer 1123 is less than 1um, the heat generating substrate 1122 is easily oxidized. When the thickness of the oxidation resistant layer 1123 is greater than 150um, heat conduction between the heat generating substrate 1122 and the infrared radiation layer 1124 is affected.

In this embodiment, the infrared radiation layer 1124 may be an infrared layer. The infrared layer may be an infrared layer forming substrate formed on a side of the oxidation resistant layer 1123 remote from the heat generating substrate 1122 under high temperature heat treatment. In this embodiment, the infrared layer forming matrix may be a silicon carbide, spinel or composite type matrix thereof. Of course, it is to be understood that in other embodiments, the infrared radiation layer 1124 is not limited to being an infrared layer. In other embodiments, the infrared radiation layer 1124 can be a composite infrared layer. In this embodiment, the infrared layer may be dip-coated, spray-coated, brush-coated, or the like on the side of the oxidation resistant layer 1123 away from the heat generating substrate 1122. The thickness of the infrared radiation layer 1124 can be 10um-300um, and when the thickness of the infrared radiation layer 1124 is 10um-300um, the infrared radiation effect is better, so that the atomization efficiency and the atomization taste of the aerosol-forming substrate 200 are better. Of course, it is understood that in other embodiments, the thickness of the infrared radiation layer 1124 is not limited to 10um-300um.

In the present embodiment, the heat generating portion 1120 includes a first heat generating portion 112a and a second heat generating portion 112b; one end of the first heating portion 112a and one end of the second heating portion 112b are connected, and the first free end 112d is disposed at one end of the first heating portion 112a, which is not connected with the second heating portion 112b; the second free end 112e is disposed at an end of the second heat generating portion 112b that is not in contact with the first heat generating portion 112 a. In the present embodiment, the first heat generating portion 112a and the second heat generating portion 112b are integrally formed, and may be formed by bending one heat generating portion 112. It is understood that in other embodiments, the first heat generating portion 112a and the second heat generating portion 112b may be separate structures, and the first heat generating portion 112a and the second heat generating portion 112b may be two heat generating bodies 112 respectively. It will be appreciated that in other embodiments, the second heat generating portion 112b may be omitted and a conductive rod that does not generate heat may be used instead.

In the present embodiment, the heat generating portion 1120 is formed by a single spiral winding method. Specifically, the second heat generating portion 112b may be linear, and the first heat generating portion 112a may be wound around the second heat generating portion 112b, with the second heat generating portion 112b as a central rod, along the circumferential direction and the axial direction of the second heat generating portion 112 b. The heat generating portion 1120 may include a plurality of bending sections 112c, that is, the first heat generating portion 112a includes a plurality of bending sections 111c. Of course, it is understood that the bending section 111c is not limited to be a plurality of sections, but may be a single section. In the present embodiment, the plurality of bending sections 112c are disposed at intervals and are equally distributed in the axial direction of the second heat generating portion 112 b. Of course, it is understood that in other embodiments, the multi-segment bend segments 112c are not limited to being equally spaced. In this embodiment, for the heating elements of the same material and uniform diameter, the overall temperature field distribution, that is, the pitch distribution, of the heating portion 1120 can be controlled by adjusting the interval distribution between the bending sections 112c to improve the heating stability and the atomization uniformity of the aerosol-forming substrate. It should be noted that, regarding the density of the whole temperature field distributed in the multi-section bending section 112c, the winding modes with different densities of the bending section 112c may be selected according to the requirement of the whole heating process of the aerosol-forming substrate and the combustion state.

In general, the smaller the pitch of the spiral, the higher the temperature of the heat generated by the same length, and the stronger the infrared radiation. However, for both ends, the heat dissipation area is larger than that of the middle part, so that the temperature of the same spiral interval is lower, and the screw pitches at both ends are small and the middle screw pitch is large in order to realize the overall temperature uniformity; however, the atomization effect of the aerosol-forming substrate 200 is not necessarily optimal in the case of a uniform temperature field, and may be controlled by providing a different spiral structure in combination with the influence of air flow or the like.

Of course, it is understood that in other embodiments, the overall temperature field distribution may be controlled by controlling the resistance, and the control of the resistance may be performed by selecting the material of the heating element 112 or controlling different diameters, that is, selecting the heating element 112 with the diameter corresponding to the material as required. In this embodiment, the resistivity may be controlled to be 0.8 to 1.6. OMEGA.mm ² And/m. Alternatively, the diameter of the heating element 112 may be 0.05-0.7mm.

In this embodiment, the outer wall of the heating element 112 may be integrally provided with an insulating structure, that is, the outer walls of the first heating portion 112a and the second heating portion 112b are provided with insulating structures. Of course, it is understood that the insulating structure may be provided only on the outer wall of the first heat generating portion 112a or the outer wall of the second heat generating portion 112 b. By providing the insulating structure, the first heat generating portion 112a and the second heat generating portion 112b can be provided with insulation therebetween. In this embodiment, the insulating structure may be an air gap, which may be formed by vaporizing an insulating coating disposed between the first heat generating portion 112a and the second heat generating portion 112b, and in this embodiment, the insulating coating may be applied to the outer surface of the first heat generating portion 112a and the outer surface of the second heat generating portion 112b, however, it is understood that in other embodiments, the insulating coating may be applied only to the outer surface of the first heat generating portion 112a or the outer surface of the second heat generating portion 112 b. In other embodiments, the insulating structure may be just an insulating layer coated on the outer surface of the first heat generating part 112a and/or the second heat generating part 112b, and the insulating layer does not need a gasification process.

In some embodiments, the insulating coating may be vaporized under the effect of high temperature, such that an air gap is formed between the first heat generating portion 112a and the second heat generating portion 112b, thereby achieving insulation. In this embodiment, the insulating coating may be teflon. Specifically, the outer surface of the heating body 112 may be entirely coated with teflon and then tightly wound in a spiral shape, so that 2 teflon coatings with a wall thickness exist between the first heating portion 112a and the second heating portion 112b, the heating portion 1120 is wound backward, and the teflon is gasified by high temperature, so that an air gap is formed between the first heating portion 112a and the second heating portion 112b, thereby being insulated by the air gap.

It will be appreciated that in other embodiments, the insulating structure is not limited to an insulating coating, and in other embodiments, the insulating structure may be an insulating sleeve, which may be sleeved on the outer periphery of the second heat generating portion 112b, so as to prevent the second heat generating portion 112b from directly contacting the first heat generating portion 112a, thereby causing local conduction or breakdown. Of course, it is understood that the insulating sleeve may also be sleeved on the outer periphery of the first heating portion 112a, and the insulating sleeve may be a micro ceramic tube, a glass tube, or other high temperature resistant insulating materials.

In some embodiments, the oxide layer 1123 formed on the outer surface of the heat generating substrate 1122 of the first heat generating portion 112a and the second heat generating portion 112b by heat treatment can also strengthen the insulation of the first heat generating portion 112a and the second heat generating portion 112b, and play a role of protecting the heat generating substrate 1122. That is, the insulating structure may also include the oxide layer 1123.

Fig. 7 shows a second embodiment of the aerosol-generating device of the utility model, which differs from the first embodiment in that the infrared radiation layer 1124 is a composite infrared layer, which may be formed by compositing an infrared layer-forming substrate with a binder for bonding with the oxidation-resistant layer 1123, in particular, the binder may be glass frit, and the composite infrared layer may be a glass frit composite infrared layer. The glass powder is adopted, so that the glass powder can be melted at high temperature, the antioxidation layer 1123 is combined with the infrared layer forming matrix, and gaps of the infrared layer forming matrix can be blocked, so that the breakdown resistance function is further improved.

Fig. 8 shows a third embodiment of the aerosol-generating device of the present utility model, which differs from the first embodiment in that the heat-generating body 112 further comprises a bonding layer 1125 disposed between the antioxidation layer 1123 and the infrared radiation layer 1124, the bonding layer 1125 being operable to prevent local breakdown of the heat-generating substrate 1122, further improving the bonding force of the antioxidation layer 1123 and the infrared radiation layer 1124. In some embodiments, the bond in the bond layer 1125 may be a glass frit, i.e., the bond layer 1125 may be a glass frit layer.

Fig. 9 to 12 show a fourth embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the heat generating structure 11 is not limited to being partially inserted into the aerosol-forming substrate 200 to heat the aerosol-forming substrate 200, and in this embodiment, the heat generating structure 11 may be sleeved on the outer periphery of the medium section of the aerosol-forming substrate 200 to heat the aerosol-forming substrate 200 by circumferential heating. In the present embodiment, the second heat generating portion 112b may be omitted.

In the present embodiment, the sleeve 111 includes a first tube 111a and a second tube 111b; the first tube 111a has a hollow structure with both ends penetrating. The first tube 111a may have a cylindrical shape, and an inner diameter thereof may be slightly larger than an outer diameter of the aerosol-forming substrate 200. A second accommodating cavity 1115 may be formed inside the first tube 111a for heating the medium section of the aerosol-forming substrate 200. The axial length of the first tube 111a may be greater than the axial length of the second tube 111 b. The second tube 111b may be sleeved on the outer periphery of the first tube 111a, the second tube 111b may be cylindrical, the radial dimension of the second tube 111b may be greater than the radial dimension of the first tube 111a, that is, a space is reserved between the second tube 111b and the first tube 111a, the space may form a first accommodating cavity 1113, and the first accommodating cavity 1113 is used for accommodating the heating element 112. In some embodiments, the heating element 112 is wound around the outer periphery of the first tube 111a, and an air space 1114 is reserved between the inner wall of the second tube 111b and the outer wall of the first tube 111a, so that a certain temperature difference is formed between the inner wall of the first accommodating cavity 1113 and the heating element 112, and a heat insulation effect is achieved. In some embodiments, the inner wall of the second tube 111b may be provided with a reflective layer for reflecting heat of the heating body 112 and radiating to the aerosol-forming substrate 200, enhancing heating energy efficiency.

In other embodiments, the heat generating body 112 is not limited to be integrally disposed at a distance from the first tube 111a or the second tube 111 b. In other embodiments, the heating element 112 may be partially spaced from the first tube 111a, and the radial dimension of the partial section of the heating portion 1120 may be equal to the outer diameter of the first tube 111a, which may serve as a limiting function. In some embodiments, the heating element 112 may also be partially spaced from the second tube 111b, and the radial dimension of the partial section of the heating portion 1120 may be comparable to the radial dimension of the second tube 111 b.

Fig. 13 shows a fifth embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the multi-segment bending segments 112c may be distributed in a dense-dense phase.

Fig. 14 shows a sixth embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the multi-segmented bending segments 112c may be distributed in a sparse-then-dense manner.

Fig. 15 shows a seventh embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the multi-segmented bending segments 112c may be distributed densely followed by sparsely.

Fig. 16 shows an eighth embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the multi-section bending sections 112c may be distributed in a dense and sparse manner.

Fig. 17 shows a ninth embodiment of the aerosol-generating device according to the utility model, which differs from the first embodiment in that the multi-segment bent segments 112c may be densely and sparsely distributed.

Fig. 18 shows a tenth embodiment of the aerosol-generating device of the present utility model, which differs from the first embodiment in that the first heat generating portion 112a and the second heat generating portion 112b may be of a separate structure. The first heat generating portion 112a and the second heat generating portion 112b are two independent heat generating bodies 112, respectively. Of course, it is understood that the second heat generating portion 112b may be replaced by a conductive rod that does not generate heat.

Fig. 19 shows an eleventh embodiment of the aerosol-generating device according to the present utility model, which is different from the first embodiment in that the first heating portion 112a and the second heating portion 112b of the heating element 112 may be wound in a double-spiral winding manner to form a heating portion 1120 having a double-spiral structure.

Fig. 20 and 21 show a twelfth embodiment of the aerosol-generating device according to the present utility model, which is different from the first embodiment in that the heating element 112 may be formed into the heating portion 1120 by an M-winding method. Specifically, the heating structure 11 may include two bobbins 114, the two bobbins 114 may be disposed at intervals, and the heating body 112 may be wound on the two bobbins 114. The two bobbins 114 have the same structure and radial dimensions, so that the dimension of the entire heat generating part 1120 in the radial direction of the bobbins 114 is uniformly distributed in the axial direction of the heat generating part 1120. In this embodiment, the heating structure 11 further includes a supporting rod 115, and the supporting rod 115 can be disposed between the two winding wires 114 for supporting.

Fig. 22 shows a thirteenth embodiment of the aerosol generating device according to the present utility model, which is different from the second embodiment in that one of the bobbins 114 has a smaller radial dimension than the other bobbin 114, so that the entire heat generating part 1120 may be tapered, and the conductive part 1121 may pass out of the bobbin 114 having a larger radial dimension.

Fig. 23 to 24 show a fourteenth embodiment of an aerosol-generating device according to the present utility model, which differs from the fourth embodiment in that the heat generating body 112 is formed with a double-spiral winding type heat generating portion 1120.

Fig. 25 to 26 show a fifteenth embodiment of an aerosol-generating device according to the present utility model, which differs from the fourteenth embodiment in that the heat generating body 112 is formed with a heat generating portion 1120 by an M-wire winding method.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (28)

1. A heat generating structure, characterized by comprising a sleeve (111) and a heat generating body (112) arranged at least partially at intervals with the sleeve (111), wherein the heat generating body (112) comprises a heat generating substrate (1122) generating heat in an energized state, and an infrared radiation layer (1124) arranged on the outer surface of the heat generating substrate (1122) for radiating infrared light waves; the sleeve (111) is used for transmitting the infrared light wave; the heating element (112) is at least partially bent and provided with a first free end (112 d) and a second free end (112 e), the sleeve (111) is provided with two end parts distributed along the axial direction, and the first free end (112 d) and the second free end (112 e) are led out from the same end part of the sleeve (111).

2. The heat generating structure as recited in claim 1, wherein the heat generating body (112) includes a plurality of bending sections (112 c), and the bending sections (112 c) are arranged at intervals.

3. The heat generating structure as recited in claim 2, characterized in that the plurality of bending sections (112 c) are equally spaced.

4. The heat generating structure as recited in claim 2, characterized in that the plurality of bending sections (112 c) are distributed with a density.

5. The heat generating structure as recited in claim 2, characterized in that the plurality of bending sections (112 c) are distributed in a sparse-then-dense manner.

6. The heat generating structure as recited in claim 2, characterized in that the plurality of bending sections (112 c) are densely distributed and then sparsely distributed.

7. The heat generating structure as recited in claim 2, characterized in that the plurality of bending sections (112 c) are distributed in a dense-sparse manner.

8. The heat generating structure as recited in claim 2, wherein the plurality of bending sections (112 c) are densely and densely distributed.

9. The heat generating structure according to claim 1, wherein the heat generating body (112) includes a first heat generating portion (112 a) and a second heat generating portion (112 b);

the first heating part (112 a) is wound outside the second heating part (112 b).

10. The heat generating structure according to claim 9, wherein the second heat generating portion (112 b) is linear;

the first heating portion (112 a) includes at least one bending section (112 c).

11. The heat generating structure according to claim 9, wherein the first free end (112 d) is provided at one end of the first heat generating portion (112 a) for forming an electrically conductive portion (1121); the second free end (112 e) is disposed at one end of the second heat generating portion (112 b) for forming another conductive portion (1121).

12. The heat generating structure according to claim 9, wherein the first heat generating portion (112 a) and the second heat generating portion (112 b) are of a split structure.

13. The heat generating structure according to claim 9, wherein the first heat generating portion (112 a) and the second heat generating portion (112 b) are of an integral structure.

14. The heat generating structure according to claim 9, wherein the first heat generating portion (112 a) and the second heat generating portion (112 b) are provided in an insulating manner;

and/or the first free end (112 d) and the second free end (112 e) are arranged insulated.

15. The heat generating structure according to claim 9, wherein an outer wall of the first heat generating portion (112 a) and/or the second heat generating portion (112 b) is provided with an insulating structure.

16. The heat generating structure according to claim 15, characterized in that the insulating structure comprises an air gap or an insulating layer applied to the outer surface of the first heat generating part (112 a) and/or the second heat generating part (112 b).

17. The heat generating structure according to claim 15, characterized in that the insulating structure includes an oxide layer (1123) formed on an outer surface thereof by heat treatment of a heat generating base (1122) of the first heat generating portion (112 a) and/or the second heat generating portion (112 b).

18. The heat generating structure according to claim 1, wherein the diameter of the heat generating body (112) is 0.05-0.7mm.

19. The heat-generating structure according to claim 1, wherein the electric resistivity of the heat-generating body (112) is 0.8 to 1.6 Ω mm ² /m。

20. The heating structure according to claim 1, wherein the sleeve (111) is hollow and tubular, and a first accommodating chamber (1113) for accommodating the heating element (112) is formed inside, and the heating element (112) is disposed at a distance from an inner wall of the first accommodating chamber (1113).

21. The heating structure according to claim 1, wherein the heating bodies (112) are arranged at intervals on the outer periphery of the sleeve (111), and the interior of the sleeve (111) is hollow and forms a second accommodating chamber (1115) for accommodating aerosol media.

22. The heating structure according to claim 1, wherein the sleeve (111) comprises a first tube (111 a) through which light waves pass and a second tube (111 b) sleeved on the periphery of the first tube (111 a);

a space is reserved between the second pipe body (111 b) and the first pipe body (111 a), and a first accommodating cavity (1113) for accommodating the heating element (112) is formed at the space;

the heating element (112) is arranged on the periphery of the first pipe body (111 a) and is arranged at intervals with the first pipe body (111 a).

23. The heat generating structure according to claim 1, wherein one end of the sleeve (111) is provided with an opening (1110), and the first free end (112 d) and the second free end (112 e) are led out of the opening (1110) to the outside of the sleeve (111).

24. The heating structure according to claim 1, wherein the heating element (112) is integrally provided with a space between the wall of the sleeve (111).

25. The heat generating structure according to claim 1, wherein the heat generating body (112) is provided without direct contact with the sleeve (111).

26. A heat generating structure as claimed in claim 1, characterized in that the thickness of the wall of the sleeve (111) is 0.15-0.6 mm.

27. A heat generating structure as claimed in claim 1, characterized in that a distance between a wall of the sleeve (111) and the heat generating body (112) is 0.05mm to 1mm.

28. An aerosol-generating device comprising a heat generating structure according to any one of claims 1 to 27.