Aerosol generator and its heat generating structure

Abstract

The present invention relates to an aerosol generator and its heating structure. The heating structure includes a heating element capable of emitting infrared light waves when energized, a tube through which the infrared light waves are transmitted, and a temperature measuring unit for measuring temperature. The heating element and the tube wall are at least partially spaced apart. The heating element includes a heating portion and a conductive portion connected to one end of the heating portion, one end of the temperature measuring unit being connected to one end of the heating portion and the other end of the temperature measuring unit being connected to the conductive portion. The heating element of the present invention does not cause excessive combustion of the aerosol-forming matrix even in high-temperature environments, significantly improves the smoking experience, significantly shortens pre-heating time, and significantly improves the consumer experience. The temperature measuring unit is connected to the heating element and can quickly reflect temperature changes of the heating portion, thereby accurately measuring the temperature of the heating element and accurately atomizing the aerosol-forming matrix.

Description

[Technical Field]

[0001] The present invention relates to the technical field of non-combustion heating atomization, and more particularly to an aerosol generating device and its heat generating structure. [Background technology]

[0002] In the related art, an aerosol-generating device is an electronic device that heats, rather than burns, an aerosol-forming matrix (e.g., a solid matrix, such as a plant leaf product like tobacco). Generally, the aerosol-forming matrix is ​​typically atomized at temperatures below 350°C. A drawback of this heating method is that, because the heating element transfers heat to the aerosol-forming matrix directly or indirectly via a solid material, the operating temperature of the heating element must not be too high; otherwise, the aerosol-forming matrix will burn excessively, adversely affecting the smoking experience of the aerosol-generating device. Therefore, the ability to accommodate operating environments in which the operating temperature of the heating element exceeds 400°C and the detection and control of the temperature when the heating element operates at temperatures above 400°C are challenges that must be overcome by those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem that the present invention aims to solve is to provide an improved aerosol generating device and its heat generating structure. [Means for solving the problem]

[0004] The technical solution adopted by the present invention to solve the technical problems is as follows: a heat-generating structure, comprising: a heat-generating element capable of radiating infrared light waves when energized; a tube through which the infrared light waves pass; and a temperature measurement unit for measuring temperature, wherein the heat-generating element and a tube wall of the tube are at least partially spaced apart, the heat-generating element comprises a heat-generating part and a conductive part electrically connected to the heat-generating part, one end of the temperature measurement unit is connected to one end of the heat-generating part, and the other end of the temperature measurement unit is electrically connected to the conductive part.

[0005] In some embodiments, the temperature measurement unit is at least partially made of a TCR material.

[0006] In some embodiments, the temperature coefficient of the TCR material is greater than 300.

[0007] In some embodiments, the heat generating portion includes a double helical section arranged longitudinally, one end of the temperature measuring unit is connected to the double helical section, and the other end of the temperature measuring unit is connected to the conductive portion.

[0008] In some embodiments, the temperature measurement unit is located at least partially within the double helical section.

[0009] In some embodiments, the temperature measurement unit is located outside the double helical section.

[0010] In some embodiments, the heat generating portion is arranged in the longitudinal direction and includes a linear first heat generating section and a spiral second heat generating section wrapped around the first heat generating section and connected to one end of the first heat generating section, and one end of the temperature measuring unit is connected to the first heat generating section and the other end of the temperature measuring unit is connected to the conductive portion.

[0011] In some embodiments, the temperature measurement unit is located at least partially within the second helical heating section.

[0012] In some embodiments, the temperature measurement unit is located outside the second helical heating section.

[0013] In some embodiments, the heating portion is formed by bending or winding a heating wire and includes at least one M-shaped or N-shaped section.

[0014] In some embodiments, the temperature measurement unit at least partially forms the M-shaped or N-shaped section together with the heat generating portion.

[0015] In some embodiments, the heating element is disposed inside the tube, and the heating element and the inner wall of the tube are spaced apart.

[0016] In some embodiments, the tube includes a first sleeve and a second sleeve disposed over the first sleeve; a gap is provided between the first sleeve and the second sleeve, the gap being a receiving cavity for receiving the heating element; The heating element is provided on the outer periphery of the first sleeve and spaced apart from the outer wall of the first sleeve, and a heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve.

[0017] In some embodiments, the inner wall of the second sleeve is provided with a reflective layer that reflects the infrared light waves.

[0018] In some embodiments, a fixed base is provided at the bottom of the tube, and the temperature measurement unit is provided above the fixed base or partially overlaps the fixed base.

[0019] In some embodiments, the maximum operating temperature of the heating element is between 500°C and 1300°C.

[0020] In some embodiments, the present invention also provides an aerosol generating device comprising the heat generating structure described in any one of the above. [Effects of the Invention]

[0021] The beneficial effects of the present invention are as follows: The heating element of the present invention can emit infrared light waves when energized, and the infrared light waves can penetrate the tube to reach and heat the aerosol-forming matrix, and even when the maximum operating temperature of the heating element reaches 1000°C or higher (the operating temperature of the heating element of conventional HNB is usually 400°C or lower), it does not cause excessive combustion of the aerosol-forming matrix, and can significantly improve the smoking experience, greatly shorten the pre-heating time, and greatly improve the consumer experience.

[0022] The temperature measuring unit is connected to the heating element and can quickly reflect the temperature changes of the heating element, thereby enabling accurate measurement of the temperature of the heating element and accurate atomization of the aerosol-forming matrix. [Brief explanation of the drawings]

[0023] The present invention will now be further described with reference to the following drawings and examples. [Figure 1] 1 is a schematic perspective structural diagram of an aerosol generating device according to some embodiments of the present invention. [Figure 2] FIG. 2 is a schematic perspective view of the heat generating structure of the aerosol generating device shown in FIG. [Figure 3] 3 is a schematic perspective view of the temperature measuring unit of the heating element shown in FIG. 2. FIG. [Figure 4] 3 is a schematic perspective view of another temperature measuring unit of the heat generating element shown in FIG. 2. FIG. [Figure 5] 3 is a schematic perspective view of yet another temperature measuring unit of the heat generating element shown in FIG. 2. FIG. [Figure 6] 3 is a schematic perspective structural view of a further temperature measuring unit of the heating element shown in FIG. 2. FIG. [Figure 7] FIG. 10 is a schematic perspective view of a heat generating structure according to another embodiment of the present invention. [Figure 8] 8 is a schematic perspective view of another temperature measuring unit of the heat generating element shown in FIG. 7. FIG. [Figure 9] 8 is a schematic perspective view of yet another temperature measuring unit of the heat generating element shown in FIG. 7. FIG. [Figure 10] 8 is a schematic perspective structural view of a further temperature measuring unit of the heating element shown in FIG. 7. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to make the technical features, objects and effects of the present invention more clearly understandable, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] In the description of the present invention, the orientations or positional relationships indicated by terms such as "longitudinal," "axial," "length," "width," "upper," "lower," "top," "bottom," "inner," and "outer" are based on the orientations shown in the drawings or the orientations or positional relationships that are always assumed when the product of the present invention is in use, and are intended to facilitate and simplify the description of the present invention. They do not indicate or imply that the device or element must have a specific orientation, or be configured or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0026] Furthermore, the terms "first" and "second" are for descriptive purposes only and cannot be understood to indicate or imply relative importance or the number of technical features depicted. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include at least one of that feature. In describing the present invention, "plurality" means at least two sections, e.g., two sections, three, etc., unless otherwise expressly specified.

[0027] In the present invention, unless otherwise expressly specified and limited, the terms "attach," "couple," "connect," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection. They may also refer to a mechanical connection or an electrical connection. Unless otherwise expressly specified, they may refer to a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art depending on the situation.

[0028] FIG. 1 shows an aerosol-generating device 1 according to some embodiments of the present invention, and an aerosol-forming matrix 2 removably attached to one end of the aerosol-generating device 1. In some embodiments, the aerosol-generating device 1 may be prismatic so that it can be easily held by a user. The aerosol-generating device 1 is used to release the aerosol extract contained in the aerosol-forming matrix 2 in a non-combustible state by baking the aerosol-forming matrix 2 at a low temperature. The aerosol-generating device 1 also has good atomization stability and an excellent mouthfeel. In some embodiments, the aerosol-forming matrix 2 may be cylindrical or may be a strand- or sheet-shaped solid material made from plant leaves and / or stems. An aromatic component may also be added to the solid material. It should be understood that the aerosol-generating device 1 is not limited to a prismatic shape, and in some other embodiments, it may have other shapes, such as a cylindrical or elliptical cylinder.

[0029] In some embodiments, the aerosol-generating device 1 may include a heat-generating structure 10 and a housing 20 for receiving the heat-generating structure 10. In some embodiments, the heat-generating structure 10 may be cylindrical, and the aerosol-forming matrix 2 may be removably inserted therein, thereby heating and baking the aerosol-forming matrix 2 externally. In some embodiments, the aerosol-generating device 1 may further include a power supply assembly (not shown) disposed within the housing 20. A portion of the heat-generating structure 10 may be inserted within the aerosol-forming matrix 2, specifically, a portion of the heat-generating structure 10 may be inserted into the medium section of the aerosol-forming matrix 2, and may generate thermal radiation when energized to heat the medium section of the aerosol-forming matrix 2 and atomize it to generate an aerosol. In this embodiment, the thermal radiation may be thermal infrared radiation. The heat-generating structure 10 has the advantages of being easy to assemble, simple in structure, high atomization efficiency, high stability, and long service life. The power supply assembly is electrically connected to the heat-generating structure 10 and supplies power to the heat-generating structure 10 .

[0030] 2 , in some embodiments, the heating structure 10 may include a tube 11 that transmits infrared light waves, a heating element 12 that can emit infrared light waves when energized, a temperature measurement unit 13, and a fixed base 14. The tube 11 at least partially houses the heating element 12 and allows the light waves to pass through and reach the aerosol-forming matrix 2. Specifically, in this embodiment, the tube 11 transmits infrared light waves, facilitating the heating of the aerosol-forming matrix 2 by the infrared light waves emitted by the heating element 12. Specifically, a gap is provided between the heating element 12 and the tube 11. When energized, the heating element 12 rapidly heats up to 1000-1300°C in 1-3 seconds. The surface temperature of the tube 11 may be controlled to 350°C or less, and the atomization temperature of the entire aerosol-forming matrix 2 is controlled to 300-350°C. This enables the aerosol-forming matrix 2 to be accurately atomized, primarily in the wavelength range of 2-5 μm. In some embodiments, the heating element 12 may include a heating portion 121 that emits infrared light waves when energized, and a conductive portion 122 disposed at one end of the heating portion 121 for introducing electrical energy. One end of the temperature measuring unit 13 is connected to one end of the heating portion 121, and the conductive portion 122 is connected to the other end of the temperature measuring unit 13 and / or the heating portion 121. Connected to the heating portion 121, the temperature measuring unit 13 quickly reflects temperature changes in the heating portion 121 of the heating element 12, thereby enabling accurate measurement of the temperature of the heating element 12 and accurate atomization of the aerosol-forming matrix 2. The fixed base 14 is disposed at the lower open end of the tube 11, and the temperature measuring unit 13 is disposed above or partially overlaps the fixed base 14. The conductive portion 122 of the heating element 12 passes through the fixed base 14 to introduce electrical energy. The maximum operating temperature of this heating element 12 is 500°C to 1300°C, which is far higher than the 400°C of conventional technology. This avoids problems such as food burning in a high-temperature operating environment and uneven mouthfeel, and significantly reduces the preheating time.

[0031] In some embodiments, the tube 11 may be a quartz glass tube. Of course, it can be understood that in other embodiments, the tube 11 is not limited to a quartz tube, but may be other window materials through which light waves can pass, such as infrared-transmitting glass, transparent ceramics, diamond, etc.

[0032] In some embodiments, the tube 11 may be hollow. Specifically, the tube 11 includes a tubular body 111 having a circular cross section and a tip structure 112 provided at one end of the tubular body 111. Of course, it is understood that in other embodiments, the cross section of the tubular body 111 is not limited to a circular shape. The tubular body 111 has a hollow structure with one open end. The tube 11 may be attached to the fixed base 14, specifically, the tube 11 may be partially inserted into the fixed base 14. The open end may be located within the fixed base 14. The tip structure 112 may be located at an end of the tubular body 111 away from the opening. The provision of the tip structure 112 makes it easier for at least a portion of the heat-generating structure 10 to be inserted into and removed from the aerosol-forming matrix 2. In this embodiment, the tube 11 has a first cavity 113 formed therein. The first cavity 113 is a cylindrical hollow and may be non-sealed. The first cavity 113 does not require vacuum suction or inert gas filling when the heating element 12 is installed therein. Of course, the tube 11 may be sealed or vacuum suctioned to further improve mouthfeel and extend the service life of the heating element 12. It should be understood that in other embodiments, the heating element 12 may be spaced apart from the outer periphery of the tube 11, and a second cavity for accommodating the aerosol-forming matrix 2 may be formed inside the tube 11. In this embodiment, the tube 11 further includes a positioning portion. The positioning portion is provided at the open end of the tubular body 111 and extends from the radially outer side of the tubular body 111 to form a positioning flange, which can be used to attach and position the tube 11 to the fixed base 14. In this embodiment, the positioning portion may be integrally formed with the tubular body 111. Of course, it is understood that in some other embodiments, the positioning portion may be removably assembled to the tube 11 by fitting, screwing, or fastening, etc. In this embodiment, there is a gap between the inner wall of the tube 11 and the heating element 12, and the gap is air-filled or vacuum-filled.The gap prevents direct contact between the tube 11 and the heating element 12.

[0033] In some embodiments, the heating element 12 may be a single piece disposed vertically, or may be wound as a generally spiral heating portion 121. Specifically, the heating element 12 may be generally cylindrical, or may be wound as a single spiral, a double spiral, an M-shaped, an N-shaped, or other shaped configuration. Of course, it is understood that in other embodiments, the heating element 12 is not limited to a single piece, but may be two or more pieces. The shape of the heating element 12 is not limited to a cylindrical shape, and in some embodiments, the heating element 12 may be in the form of a sheet.

[0034] In this embodiment, the heat generating element 121 is disposed within the tube 11, has a gap between it and the wall of the tube 11 over its entire length, and may emit infrared light waves when energized, which can pass through the tube 11 and reach the aerosol-forming matrix 2. Of course, it should be understood that in some other embodiments, the heat generating element 121 may have a gap between it and the wall of the tube 11 at some point. In this embodiment, the heat generating element 121 may have a vertical spiral shape. Of course, it should be understood that in some other embodiments, the heat generating element 121 may not have a spiral shape.

[0035] In this embodiment, a conductive portion 122 is provided at one end of the heating portion 121. The conductive portion 122 may be connected to the heating portion 121, drawn out from the opening of the tube 11, penetrate the fixed base 14, and be conductively connected to the power supply assembly. In this embodiment, the conductive portion 122 may be fixedly formed with the heating portion 121 by welding. Of course, it is understood that in other embodiments, the heating portion 121 may be integrally formed with the conductive portion 122. In this embodiment, the conductive portion 122 may be two, and the two conductive portions 122 may be spaced apart, connected to both ends of the heating portion 121, and both extend to the same end and penetrate the tube 11 through the opening at one end of the tube 11. In this embodiment, the conductive portion 122 may be a lead that can be welded to the heating portion 121. Of course, it is understood that in other embodiments, the conductive portion 122 is not limited to a lead, and may have other conductive structures. The conductive part 122 is provided at one end of the heat generating part 121 and is drawn out from the tube 11, which facilitates the assembly of the entire heat generating structure 10 and simplifies the assembly process. During assembly, the heat generating structure 10 is attached to a holder (not shown) and then brought into contact with a conductive member in the holder.

[0036] In some embodiments, the heating element 12 may include a heat-generating substrate that generates heat when energized and an infrared-emitting layer. The heat-generating substrate is capable of generating heat when energized. The infrared-emitting layer is disposed on the outer surface of the heat-generating substrate and is used to radiate the heat generated by the heat-generating substrate. In this embodiment, the heat-generating substrate and the infrared-emitting layer are concentrically distributed in a cross section of the heating element.

[0037] In this embodiment, the heat generating substrate may be cylindrical overall, specifically, a heating wire. It is to be understood that in some other embodiments, the heat generating substrate is not limited to a cylindrical shape and may be sheet-shaped, i.e., the heat generating substrate may be a heating sheet. The heat generating substrate includes a metal substrate having high-temperature oxidation resistance, and the metal substrate may be a metal wire. Specifically, the heat generating substrate may be a metal material having properties such as good high-temperature oxidation resistance, high stability, and resistance to deformation, such as a nickel-chromium alloy substrate (e.g., nickel-chromium alloy wire) or an iron-chromium-aluminum alloy substrate (e.g., iron-chromium-aluminum alloy wire). In this embodiment, the radial dimension of the heat generating substrate may be 0.15 mm to 0.8 mm.

[0038] In this embodiment, the heating element 12 further includes an anti-oxidation layer, which is formed between the heating base and the infrared emitting layer. Specifically, the anti-oxidation layer may be an oxide film, and the heating base is subjected to high-temperature heat treatment to form a dense oxide film on its surface, which serves as the anti-oxidation layer. It is understood that in other embodiments, the anti-oxidation layer is not limited to an oxide film formed on the heating base itself, and may also be an anti-oxidation coating applied to the outer surface of the heating base. The formation of the anti-oxidation layer ensures that the heating base is not or hardly oxidized when heated in an air environment, improving the stability of the heating base. This eliminates the need to evacuate the first containing cavity 113, fill it with an inert or reducing gas, or seal the opening, simplifying the assembly process of the entire heating structure 10 and reducing manufacturing costs. In this embodiment, the thickness of the anti-oxidation layer may be 1 μm to 150 μm. If the thickness of the anti-oxidation layer is less than 1 μm, the heating base is more susceptible to oxidation. If the thickness of the antioxidant layer is greater than 150 μm, the heat conduction between the heat-generating substrate and the infrared radiating layer is affected.

[0039] In this embodiment, the infrared emitting layer may be an infrared layer. The infrared layer may be formed on the side of the antioxidant layer away from the heat-generating substrate by high-temperature heat treatment on an infrared-layer-forming substrate. In this embodiment, the infrared-layer-forming substrate may be a substrate of silicon carbide, spinel, or a composite thereof. Of course, it is understood that in other embodiments, the infrared emitting layer is not limited to an infrared layer. In other embodiments, the infrared emitting layer may be a composite infrared layer. In this embodiment, the infrared layer may be formed on the side of the antioxidant layer away from the heat-generating substrate by dip coating, spray coating, brush coating, or other methods. The thickness of the infrared emitting layer may be 10 μm to 300 μm. When the thickness of the infrared emitting layer is 10 μm to 300 μm, the thermal radiation effect is relatively good, and the atomization efficiency of the aerosol-forming matrix 2 and the mouthfeel of the atomized product are relatively good. Of course, it is understood that in other embodiments, the thickness of the infrared emitting layer is not limited to 10 μm to 300 μm.

[0040] In some embodiments, the heating element 12 further includes a bonding layer between the antioxidant layer and the infrared emitting layer, which can be used to prevent localized damage to the heating base and further improve the bonding strength between the antioxidant layer and the infrared emitting layer. In some embodiments, the bonding material in the bonding layer can be glass powder, i.e., the bonding layer can be a glass powder layer.

[0041] Referring also to Figures 3 to 6, in some embodiments, the heat generating portion 121 may be arranged in a longitudinal direction and include a linear first heat generating section 1211 and / or a spiral second heat generating section 1212 wrapped around the outside of the first heat generating section 1211 and connected to the first heat generating section 1211, and in some embodiments, the conductive portion 122 may include a first lead section 1221 connected to the first heat generating section 1211 and / or a second lead section 1222 connected to the second heat generating section 1212. In some embodiments, the temperature measuring unit 13 can at least partially replace the first heating section 1211 and / or the second heating section 1212 and / or the first lead section 1221 / second lead section 1222, and the temperature measuring unit 13 is all connected to the heating part 121, and the first heating section 1211, the second heating section 1212, the first lead section 1221, and the second lead section 1222 may be integrally molded or connected by welding, and the temperature measuring unit 13 can quickly reflect the temperature change of the heating part 121 of the heating element 12, thereby accurately measuring the temperature of the heating part 121, controlling the atomization temperature of the entire aerosol-forming matrix 2 to 300-350°C, and accurately atomizing the aerosol-forming matrix 2 mainly in the wavelength range of 2-5 μm. 3, in some embodiments, the heat generating portion 121 includes a spiral-shaped second heat generating section 1212, and in some embodiments, the conductive portion 122 may include a first lead section 1221 and a second lead section 1222, and the temperature measuring unit 13 can replace the first heat generating section 1211 connected to the second heat generating section 1212. As shown in FIG. 4, the heat generating portion 121 includes a spiral-shaped second heat generating section 1212, and the conductive portion 122 includes a second lead section 1222, and the temperature measuring unit 13 can replace the first heat generating section 1211 and the first lead section 1221.5, the heat generating part 121 includes a linear first heat generating section 1211 and a spiral second heat generating section 1212 wound around the first heat generating section 1211 and connected to the first heat generating section 1211, the conductive part 122 includes a first lead section 1221, and the temperature measuring unit 13 can replace the entire second lead section 1222. As shown in FIG. 6, in some embodiments, the heat generating part 121 includes a linear first heat generating section 1211 and a spiral second heat generating section 1212 wound around the first heat generating section 1211 and connected to the first heat generating section 1211, the temperature measuring unit 13 partially replaces the second lead section 1222, and this portion of the second lead section 1222 is connected to the second heat generating section 1212, and the conductive part 122 includes the first lead section 1221 and the remaining second lead section 1222. It is understood that the connection position of the temperature measuring unit 13 to the heat generating part 121 may be set at other positions as required.

[0042] In some other embodiments, the heat generating portion 121 includes a double helical section (not shown) arranged in the longitudinal direction, one end of the temperature measuring unit 13 is connected to the double helical section, and the other end of the temperature measuring unit 13 is connected to the conductive portion 122. Specifically, the conductive portion 122 includes a third lead section (not shown) and a fourth lead section (not shown), each connected to the double helical section. Specifically, the temperature measuring unit 13 at least partially replaces the third heat generating section. Alternatively, the temperature measuring unit 13 may at least partially replace the third lead section and / or the fourth lead section connected to the third heat generating section. It should be understood that the connection position of the temperature measuring unit 13 to the heat generating portion 121 may be set to another position as needed.

[0043] In further embodiments, the heating portion 121 may include multiple M-shaped or N-shaped sections (not shown) formed by winding or bending a long or wire-shaped heating wire, and the conductive portion includes a fifth lead section (not shown) and / or a sixth lead section (not shown) connected to the M-shaped or N-shaped sections, respectively. In some embodiments, the temperature measuring unit 13 at least partially replaces the M-shaped or N-shaped sections. Alternatively, the temperature measuring unit 13 can replace the fifth lead section and / or the sixth lead section connected to the M-shaped or N-shaped sections. It should be understood that the connection position of the temperature measuring unit 13 to the heating portion 121 may be set to another position as needed.

[0044] In some embodiments, the temperature measurement unit 13 is at least partially made of a TCR material. Preferably, the TCR material has a temperature coefficient greater than 300, which can make the measurement data more accurate. It can be understood that the temperature coefficient of the TCR material can be less than 300. In some embodiments, the TCR material can be in an elongated shape. It can be understood that the TCR material is not limited to an elongated shape, and can also be in a sheet, column, spiral, or other shape.

[0045] In some embodiments, the fixed base 14 may be made of materials such as ceramic insulating materials and PEEK high-temperature insulating materials, and may include two fixed through-holes 141 provided in the fixed base 14, into which the two conductive portions 122 are inserted.

[0046] In some embodiments, the heating structure further includes a support rod, which is an insulating rod. The support rod may be partially inserted into the heating part 121, may be located at the center of the heating part 121, and may be insulated from the heating part 121, and may serve to support the heating part 121. The support rod supports the heating part 121, prevents the heating element 12 from being completely deformed when heated, and ensures a uniform gap between the heating element 12 and the tube 11, thereby ensuring a consistent temperature field. It can be understood that in other embodiments, other structures may be provided to support the heating part 121 instead of the support rod.

[0047] FIG. 7 shows a heat-generating structure 10a according to a second embodiment of the present invention, which differs from the first embodiment mainly in the following respects: The heat-generating structure 10a is not limited to being partially inserted into the aerosol-forming matrix to heat the aerosol-forming matrix; in this embodiment, the heat-generating structure 10a is fitted around the outer periphery of the medium section of the aerosol-forming matrix to heat the aerosol-forming matrix in a circumferential heating manner. In some embodiments, the heat-generating structure 10a may include a tube 11a, a heat-generating element 12a, and a temperature-measuring unit 13a. The heat-generating element 12a and the tube wall of the tube 11a are at least partially spaced apart. In some embodiments, the heat-generating element 12a may include a heat-generating portion 121a that emits infrared light waves when energized and a conductive portion 122a provided at one end of the heat-generating portion 121a for introducing electrical energy.

[0048] In some embodiments, the tube 11a may include a first sleeve 111a and a second sleeve 112a fitted over the outer periphery of the first sleeve 111a. The first sleeve 111a may have a hollow structure with both ends penetrated. The first sleeve 111a may be cylindrical, and its inner diameter may be slightly larger than the outer diameter of the aerosol-forming matrix. A gap may be provided between the first sleeve 111a and the second sleeve 112a, and this gap may form a cavity for fitting the heating element 12a. The axial length of the first sleeve 111a may be larger than the axial length of the second sleeve 112a. The second sleeve 112a may be fitted over the outer periphery of the first sleeve 111a. The second sleeve 112a may be cylindrical, and the radial dimension of the second sleeve 112a may be larger than the radial dimension of the first sleeve 111a. In some embodiments, the heating element 12a is wound around the outer periphery of the first sleeve 111a and spaced apart from the outer wall of the second sleeve 112a, thereby creating a predetermined temperature difference between the inner wall of the containing cavity and the heating element 12, thereby providing thermal insulation. A heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve 111a.

[0049] In some embodiments, the second sleeve 112a has a reflective layer on the inside thereof, which is used to reflect the heat generated by the heating element 12 and radiate it to the aerosol-forming matrix, thereby increasing the energy efficiency of heating. It can be understood that the first sleeve 111a and the second sleeve 112a are not limited to a cylindrical shape, but may have other shapes such as a rectangular cylindrical shape, an elliptical cylindrical shape, etc.

[0050] In some embodiments, the second sleeve 112a further includes a securing structure, which is used to secure the heating element 12a.

[0051] 8 to 10, in some embodiments, the heating element 121a may be a spiral-shaped fourth heating section 1211a, and the conductive portion 122a includes a seventh lead section 1221a and / or an eighth lead section 1222a connected to opposing sides of the fourth heating section 1211a. The temperature measuring unit 13a at least partially replaces the seventh lead section 1221a and / or the eighth lead section 1222a connected to the heating element 121a. The temperature measuring unit 13a quickly reflects temperature changes in the heating element 121a of the heating element 12a, thereby accurately measuring the temperature of the heating element 12a and accurately atomizing the aerosol-forming matrix. Specifically, as shown in FIG. 8, in some embodiments, the temperature measuring unit 13a completely replaces the seventh lead section 1221a, and the conductive portion 122a includes the eighth lead section 1222a. 9, in some embodiments, the temperature measuring unit 13a partially replaces the seventh lead section 1221a connected to the heat generating unit 121a, and the conductive unit 122a includes the eighth lead section 1222a. As shown in FIG. 10, the temperature measuring unit 13a partially replaces the seventh lead section 1221a connected to the heat generating unit 121a and completely replaces the eighth lead section 1222a, and the conductive unit 122a includes the remaining seventh lead section 1221a. It should be understood that the connection position of the temperature measuring unit 13a to the heat generating unit 121a may be set as needed.

[0052] The above examples merely represent preferred embodiments of the present invention, and although the descriptions are relatively specific and detailed, it should be understood that this does not limit the scope of the present invention. Those skilled in the art can freely combine the above technical features and make slight modifications and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, all conversions and modifications equivalent to the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A heat generating structure, A heating structure comprising: a heating element capable of emitting infrared light waves when energized; a tube through which the infrared light waves pass; and a temperature measurement unit for measuring temperature, wherein the heating element and the tube wall are at least partially spaced apart; the heating element comprises a heating portion and a conductive portion electrically connected to the heating portion; one end of the temperature measurement unit is connected to one end of the heating portion; and the other end of the temperature measurement unit is electrically connected to the conductive portion.

2. The heat generating structure according to claim 1 , wherein the temperature measuring unit is at least partially made of a TCR material.

3. 3. The heating structure of claim 2, wherein the temperature coefficient of the TCR material is greater than 300.

4. 3. The heating structure of claim 2, wherein the heat generating portion includes a double spiral section arranged in the longitudinal direction, one end of the temperature measuring unit is connected to the double spiral section, and the other end of the temperature measuring unit is connected to the conductive portion.

5. The heat generating structure of claim 4 , wherein the temperature measuring unit is at least partially located within the double helical section.

6. The heat generating structure according to claim 4 , wherein the temperature measuring unit is located outside the double helical section.

7. 3. The heating structure of claim 2, wherein the heat generating portion includes a first heat generating section arranged in a longitudinal direction and having a straight line, and a second heat generating section wound around the first heat generating section and connected to one end of the first heat generating section, and one end of the temperature measuring unit is connected to the first heat generating section, and the other end of the temperature measuring unit is connected to the conductive portion.

8. The heating structure according to claim 7 , wherein the temperature measurement unit is at least partially located within the second spiral heating section.

9. The heating structure according to claim 7 , wherein the temperature measuring unit is located outside the second spiral heating section.

10. The heating structure according to claim 2 , wherein the heating portion is formed by bending or winding a heating wire and includes at least one M-shaped or N-shaped section.

11. The heat generating structure according to claim 10 , wherein at least a portion of the temperature measuring unit forms the M-shaped or N-shaped section together with the heat generating portion.

12. The heat generating structure according to claim 1 , wherein the heat generating element is provided inside the tube, and the heat generating element and the inner wall of the tube are spaced apart.

13. The tube includes a first sleeve and a second sleeve that is fitted over the outer periphery of the first sleeve, a gap is provided between the first sleeve and the second sleeve, the gap serving as a receiving cavity for receiving the heating element; The heating structure of claim 1, wherein the heating element is provided on the outer periphery of the first sleeve and spaced apart from the outer wall of the first sleeve, and a heating cavity for heating the aerosol-forming matrix is ​​formed inside the first sleeve.

14. The heat generating structure according to claim 13, wherein the second sleeve has an inner wall provided with a reflective layer for reflecting the infrared light waves.

15. The heating structure according to claim 1 , wherein a fixed base is provided at the lower part of the tube, and the temperature measuring unit is provided above the fixed base or partially overlaps the fixed base.

16. 2. The heating structure according to claim 1, wherein the maximum operating temperature of the heating element is 500 to 1300°C.

17. An aerosol generating device, comprising: An aerosol generating device, comprising the heat generating structure according to any one of claims 1 to 16.

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