A far infrared core heater and an aerosol-generating device

Abstract

The utility model relates to a kind of far-infrared core heater and aerosol-generating device, heater includes hollow tube, heating wire, high infrared emissivity filling body and high-temperature-resistant fixed seat;Hollow tube is made of material with far-infrared transmissivity or far-infrared excitation, heating wire is inserted in the hollow portion of hollow tube, high infrared emissivity filling body is filled in the gap between hollow tube and heating wire, for the heat energy of heating wire export and stimulate far-infrared ray emission itself, far-infrared ray penetrates needle-shaped hollow tube wall and acts on aerosol-generating substrate, realize heating wire and substrate not direct contact;High-temperature-resistant fixed seat is installed in the lower end of hollow tube.The overall scheme is through the synergistic innovation of non-contact far-infrared heating, segmented temperature control, accurate self-temperature sensing and stable assembly, which improves heating uniformity and taste stability, simplifies temperature control structure and reduces cost, and meets the practical needs of small-sized aerosol-generating device.

Description

Technical Field

[0001] This utility model relates to the field of aerosol generation technology. Background Technology

[0002] In aerosol generating devices (such as heated tobacco products), the heating method for the loose, tubular solid aerosol generating matrix, such as tobacco shreds, directly affects the aerosol generating efficiency, taste, and equipment safety. Existing heating technologies have the following shortcomings:

[0003] Needle or tongue heaters: Heat is generated by inserting a needle or tongue-shaped heating element into the center of the matrix. The heat diffuses outward from the center, resulting in excessively high temperature in the center and insufficient temperature in the periphery. This can easily cause carbonization in the center of the matrix and incomplete heating of the periphery. In addition, the direct contact between the heating element and the matrix can easily cause impurities to stick, affecting cleanliness and taste.

[0004] Tubular opaque heaters (ceramic tubes, stainless steel tubes, etc.): The substrate is placed inside the heating tube, and heat is conducted from the outer wall of the tube through the inner wall to the surface of the substrate, and then penetrates from the surface to the center. The heating uniformity is poor and the time is long. At the same time, the heat diffuses out of the tube, resulting in low energy utilization. Additional heat insulation structures are required, which increases the size of the equipment.

[0005] Needle and tubular combined heaters: Improve uniformity by heating from the inside and outside simultaneously, but the dual heater design results in excessive power consumption, which increases energy consumption, especially for battery-powered devices, and significantly shortens the battery life.

[0006] Transparent quartz tube heaters: These heaters utilize tube wall conduction and infrared emission to achieve heating. While this improves uniformity, the quartz tubes are brittle and difficult to thin, resulting in high heat absorption and low heating efficiency. Furthermore, heat diffuses outward from the tube, requiring complex insulation structures, which increases manufacturing costs and equipment size.

[0007] In summary, existing technologies suffer from problems such as poor heating uniformity, low energy utilization, and large equipment size, leaving room for improvement. Utility Model Content

[0008] The technical problem solved by this disclosure is to provide an improved far-infrared core heater that can achieve non-contact heating with the aerosol generation matrix, thereby improving the heating effect; and to provide an aerosol generation device having the far-infrared core heater.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a far-infrared core heater, the heater comprising a hollow tube, a heating wire, a high infrared emissivity filler, and a high-temperature resistant fixing base; the hollow tube is made of a high-temperature resistant material with far-infrared transmittance or far-infrared excitation properties, the heating wire is inserted into the hollow part of the hollow tube, the high infrared emissivity filler fills the gap between the hollow tube and the heating wire, and is used to conduct heat energy of the heating wire and excite itself to emit far-infrared rays, the far-infrared rays penetrate the tube wall of the needle-shaped hollow tube and act on the aerosol generation matrix, so that the heating wire and the matrix do not directly contact each other; the high-temperature resistant fixing base is installed at the lower end of the hollow tube.

[0010] As described above, the far-infrared core heater has a needle-shaped structure, with one end of the needle-shaped structure being either sharp or tapered, so as to be inserted into the aerosol generation matrix.

[0011] As described above, the far-infrared core heater has a spring-shaped heating wire with an automatically centered electrode head at its top. The heating wire is guided by the electrode head in conjunction with the inclined surface at the top of the hollow tube to be centered within the hollow tube, so that a uniform gap is formed between the heating wire and the inner wall of the hollow tube.

[0012] As described above, the far-infrared core heater has a heating wire with built-in TCR temperature sensing characteristics, which is used to realize temperature detection and control.

[0013] The far-infrared core heater described above also includes a heat-insulating / heat-absorbing filler, which fills the gap between the lower half of the hollow tube and the heating wire to reduce the temperature of the lower half of the hollow tube and prevent carbonization of the matrix plug.

[0014] As described above, in the far-infrared core heater, the high infrared emissivity filler is filled in the gap between the upper half of the hollow tube and the heating wire, and the heat insulation / heat absorption filler is arranged in upper and lower sections inside the hollow tube.

[0015] As described above, the far-infrared core heater uses silicon carbide, alumina, or zirconium oxide as the high infrared emissivity filler; and the heat insulation / heat absorption filler uses porous composite ceramic, high-purity porous graphite, or high-silica glass fiber composite material.

[0016] As described above, in the far-infrared core heater, a insertion cavity is formed in the high-temperature resistant fixing base, the lower end of the hollow tube is inserted into the insertion cavity, and a high-temperature resistant sealing material is fixed between the lower end of the hollow tube and the insertion cavity.

[0017] As described above, the hollow tube of the far-infrared core heater is made of quartz, zirconium oxide, or silicon carbide.

[0018] An aerosol generating apparatus, the apparatus comprising a far-infrared core heater as described in any of the preceding claims.

[0019] The beneficial effects of this disclosure are as follows: The far-infrared core heater converts the heat energy of the heating wire into far-infrared rays through a high-infrared emissivity filler. These rays penetrate the hollow tube wall and act on the matrix, preventing direct contact between the heating wire and the matrix. This fundamentally solves problems such as "impurities adhering to the heating element" and "localized high-temperature scorching" in traditional heating methods, improving the smoking experience and simplifying the cleaning process. The far-infrared rays can act directly on the interior of the matrix, avoiding the inefficient heating mode of traditional "surface conduction → center penetration" and shortening the heating time. The heater, through the heat-insulating / heat-absorbing filler in the lower half of the hollow tube, specifically reduces the temperature at the part passing through the matrix plug, preventing the plug from carbonizing at high temperatures and producing odors, further ensuring the stability of the smoking experience.

[0020] The integrated design of the hollow tube, heating wire, and filler structure, combined with the stable assembly of the high-temperature resistant mounting base, eliminates the need for complex external insulation components, reducing equipment space requirements and adapting to the needs of miniaturized aerosol generation devices. The hollow tube can be made of various high-temperature resistant materials with far-infrared properties, such as quartz, zirconium oxide, and silicon carbide, avoiding the brittleness limitations of single materials (such as quartz), improving production yield, and reducing manufacturing costs. Without the need for a dual-heater combination, single-point heating through efficient far-infrared conversion can meet the requirements, reducing overall power consumption and extending operating time. Attached Figure Description

[0021] Some specific embodiments of the present invention will now be described in detail by way of example and not limitation, with reference to the accompanying drawings, in which the same reference numerals designate the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0022] In the attached image:

[0023] Figure 1 This is a cross-sectional view of the heater of this utility model;

[0024] Figure 2 This is a schematic diagram of the heater of this utility model assembled in an aerosol generating device;

[0025] The markings in the image are explained as follows:

[0026] 1. Heater; 2. Hollow tube; 3. Heating wire; 30. Electrode head; 4. High infrared emissivity filler; 5. Heat insulation / heat absorption filler; 6. Mounting base; 7. Temperature-resistant sealing material. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0028] Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by those skilled in the art to which this utility model pertains.

[0029] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a,” “one,” or “the” do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including” or “contains” mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The terms “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0030] See appendix Figure 1 The image shows a far-infrared core heater 1, which includes a hollow tube 2, a heating wire 3, a high infrared emissivity filler 4, and a high-temperature resistant mounting base 6. The hollow tube 2 is made of a high-temperature resistant material with far-infrared transmittance or far-infrared excitation properties. The heating wire 3 is inserted into the hollow part of the hollow tube 2. The high infrared emissivity filler 4 fills the gap between the hollow tube 2 and the heating wire 3, which is used to conduct the heat energy of the heating wire 3 and excite itself to emit far-infrared rays. The far-infrared rays penetrate the tube wall of the needle-shaped hollow tube 2 and act on the aerosol generation matrix, so that the heating wire 3 does not directly contact the matrix. The high-temperature resistant mounting base 6 is installed at the lower end of the hollow tube 2.

[0031] Hollow tube 2 can be made of materials such as quartz, zirconium oxide, or silicon carbide. For example, silicon carbide has excellent high-temperature resistance, with a long-term temperature resistance of ≥1200℃, and good transmittance in the far-infrared band (8-14μm), with a transmittance of ≥85%. At the same time, its mechanical strength is higher than that of quartz, making it less prone to brittleness. Hollow tube 2 is generally slender and cylindrical, with an opening at the bottom and a closed structure at the top to reduce heat loss.

[0032] Heating wire 3 can be made of high temperature resistant materials such as 316L stainless steel or 430 stainless steel, and has its own TCR temperature sensing characteristics. It is processed into a spring-loaded spiral structure to increase the effective heating area. The overall length is adapted to the internal space of the hollow tube 2. Nickel-plated copper wire is welded to heating wire 3 as positive and negative leads. The leads are led out through the opening at the lower end of the hollow tube 2.

[0033] The emissivity of the high infrared emissivity filler 4 is generally ≥0.85. It can be made of silicon carbide, alumina, or zirconium oxide. The fluid high infrared emissivity material is injected into the hollow tube 2 through the opening and into the gap between the heating wire 3 and the hollow tube 2, so that the fluid is fully filled and no gaps are left. Then, it is dried and sintered at high temperature to ensure that the spacing between the heating wire 3 and the inner wall of the hollow tube 2 is uniform and that the heat energy of the heating wire 3 can be well conducted to the high infrared emissivity filler 4, thereby exciting the filler material to emit a large amount of far-infrared rays. The far-infrared rays penetrate the tube wall of the hollow tube 2 and act directly on the aerosol generation matrix, thereby producing a large amount of inhalable aerosol.

[0034] The high-temperature resistant mounting base 6 can be made of materials such as mullite ceramic, which has a high temperature resistance of ≥1300℃ and stable insulation performance. It can also be made of high-temperature resistant engineering plastics such as (Peek, PC+glass fiber, polyimide, etc.). The mounting base 6 is cylindrical in shape, with a plug-in cavity in the center that fits the lower end of the hollow tube 2. The lower end of the hollow tube 2 is inserted into the plug-in cavity. A lead wire through hole is formed at the bottom of the plug-in cavity for leading out the positive and negative leads of the heating wire 3.

[0035] A heat-resistant sealing material 7 is fixed between the lower end of the hollow tube 2 and the insertion cavity. A space for the sealing material is reserved between the lower end of the hollow tube 2 and the insertion cavity. For example, a high-temperature sealing adhesive based on aluminosilicate is used, which is paste-like when uncured, facilitating filling. After curing, it has a temperature resistance ≥1000℃, a thermal conductivity of 0.8W / (m·K) (allowing for the dissipation of a small amount of heat to avoid localized heat accumulation), a compressive strength ≥30MPa, and a bonding strength ≥5MPa with ceramics and zirconium oxide, ensuring reliable connection.

[0036] If the connection between the fixing seat 6 and the hollow tube 2 relies solely on interference fit or simple potting, loosening (axial displacement ≥ 0.5 mm) or seal failure (air leakage leading to heat loss) is likely to occur under long-term high temperature (350-400℃) and frequent insertion and removal (axial force when inserting into the substrate), thus affecting heating stability. This solution addresses this problem through the synergy of the insertion cavity and the heat-resistant sealing material 7.

[0037] Specifically, a spring-shaped heating wire 3 is inserted into the hollow part of the hollow tube 2 through the lower opening. The position of the heating wire 3 is adjusted so that the effective heating section of the heating wire 3 is precisely aligned with the core heating area of ​​the subsequent aerosol generation matrix. This ensures that the positive and negative leads extend smoothly from the lower opening of the hollow tube 2 without bending or jamming. A precision dispensing machine is used to draw up a fluid-like high-infrared emissivity filler and inject it at a uniform speed from the lower opening of the hollow tube 2 until the slurry completely fills the gap between the hollow tube 2 and the heating wire 3. Then, it is dried and sintered at high temperature to form a dense high-infrared emissivity filler 4. After sintering, the heating wire 3, supported by the high-infrared emissivity filler 4, is evenly spaced from the periphery of the hollow tube 2.

[0038] A socket is formed in the high-temperature resistant mounting base 6. The lower end of the hollow tube 2 (the end extending out of the positive and negative leads) is inserted into the socket of the high-temperature resistant mounting base 6, so that the lower end face of the hollow tube 2 fits tightly against the bottom of the socket. The positive and negative leads pass downward from the lead through hole at the bottom of the socket and leave sufficient length. Aluminosilicate high-temperature resistant potting compound (temperature resistance ≥800℃) is injected into the gap between the socket and the hollow tube 2, and then cured in an oven to achieve a solid integrated connection between the hollow tube 2 and the mounting base 6, while ensuring the insulation between the leads and the mounting base 6.

[0039] See appendix Figure 2 The assembled far-infrared core heater 1 is installed in the aerosol generating device, so that the upper section of the hollow tube 2 corresponding to the effective heating section of the heating wire 3 is inserted into the central area of ​​the loose tubular aerosol generating matrix such as tobacco. The fixing seat 6 at the lower end of the hollow tube 2 can be locked and fixed to the device housing by means of threaded structure, etc. The positive and negative leads of the heating wire 3 are electrically connected to the temperature control power supply module of the device.

[0040] When the device is started, the temperature control module outputs a stable current to the heating wire 3, which heats up rapidly. The heat is quickly conducted through the high infrared emissivity filler 4, which excites the heating element to emit a large amount of far-infrared rays. The far-infrared rays penetrate the wall of the silicon carbide hollow tube 2 and directly radiate into the surrounding aerosol generation matrix, so that the matrix is ​​heated evenly and aerosols are generated rapidly. Since the heating wire 3 is completely encapsulated and isolated from the silicon carbide hollow tube 2 by the high infrared emissivity filler 4, it does not come into direct contact with the matrix throughout the process, effectively avoiding problems such as "heating element sticking to oil and impurities" and "local high temperature scorching" in traditional heating methods.

[0041] In some embodiments, the hollow tube 2 is a needle-shaped structure, with one end of the needle-shaped structure being sharp or tapered so as to be inserted into the aerosol generation matrix.

[0042] Zirconia material can be used to prepare the needle-shaped hollow tube 2, which has a high temperature resistance of ≥1000℃ and a far-infrared transmittance of ≥80% (8-14μm band). The sharp end of the hollow tube 2 is rounded to avoid scratching the matrix during insertion. The heating wire 3 is inserted into the lower opening of the needle-shaped hollow tube 2, and its position is adjusted so that the effective heating section is located in the non-gradient section of the hollow tube 2, with the lead wire extending from the lower opening. After injecting the high infrared emissivity slurry into the gap, it is dried and sintered to ensure that there are no voids in the filler of both the tapered and non-gradient sections.

[0043] By utilizing the sharp end and tapered design of the needle-shaped structure, it can easily penetrate the aerosol generation matrix (such as tobacco column). The insertion process has lower resistance than non-needle-shaped structures and will not cause excessive breakage or displacement of the matrix. The sharp end guides the heater 1 to be inserted along the central axis of the matrix, ensuring that the effective heating section is located in the core area of ​​the matrix, and improving the matching degree between the far-infrared radiation range and the matrix distribution.

[0044] In some embodiments, the heating wire 3 is spring-shaped, and the top of the heating wire 3 has an automatically centered electrode head 30. The heating wire 3 is guided by the electrode head 30 in conjunction with the inclined surface at the top of the hollow tube 2 to be centered inside the hollow tube 2, so that a uniform gap is formed between the heating wire 3 and the inner wall of the hollow tube 2.

[0045] Insert the spring-shaped heating wire 3 into the lower opening of the needle-shaped hollow tube 2, so that the self-aligning electrode head 30 (cylinder) at the top approaches the "V"-shaped inclined surface at the top of the hollow tube 2. When the conical transition surface of the electrode head 30 contacts the "V"-shaped inclined surface, the radial component force generated by the inclination of the inclined surface automatically corrects the offset of the heating wire 3. Continue to push the heating wire 3 until the cylinder of the electrode head 30 is completely fitted and positioned in the sharp space at the top of the hollow tube 2.

[0046] After assembly, the heating wire 3 achieves high coaxiality within the hollow tube 2 through the engagement of the electrode head 30 and the "V"-shaped bevel. This ensures consistent thickness of the high infrared emissivity filler 4 in the circumferential direction, preventing localized differences in infrared intensity caused by uneven gaps. No manual adjustment of the heating wire 3's position is required; the bevel automatically guides alignment during insertion, improving assembly efficiency compared to traditional manual alignment methods and reducing the risk of deviations caused by manual operation.

[0047] In some embodiments, the heating wire 3 has built-in TCR temperature sensing characteristics for temperature detection and control.

[0048] TCR (Temperature Coefficient of Resistance), for example, materials such as 316L stainless steel or 430 stainless steel, have a core characteristic of possessing a stable resistance temperature system, exhibiting a significant positive temperature coefficient within the 300-450℃ range (the typical heating range for aerosol-generating matrices). This characteristic is an inherent physical property of the material, eliminating the need for additional temperature-sensing elements to achieve temperature detection.

[0049] In this embodiment, the resistance of the heating wire 3 exhibits a strictly linear relationship with temperature. The underlying logic is as follows: when the heating wire 3 is energized and heats up, the increased temperature leads to intensified lattice vibrations within the material, increasing the resistance to electron movement, and consequently, a regular increase in resistance. A precise resistance-temperature curve can be established through pre-calibration. The device's temperature control module can deduce the current temperature by real-time acquisition of the resistance value of the heating wire 3, and then adjust the output voltage or current to achieve closed-loop control of the heating temperature.

[0050] Traditional aerosol generators often rely on external thermistors or thermocouples for temperature control (which need to be installed near the heating element), which has the following drawbacks: increased component costs; temperature control accuracy affected by sensor installation location; and sensors prone to loosening or aging due to vibration and high temperatures during long-term use, leading to temperature control failure. In this solution, the heating wire 3 itself possesses TCR characteristics, eliminating the need for an external sensor: it directly uses the heating element as the temperature source, resulting in a small deviation between the detected temperature and the actual heating temperature; it reduces the number of components and lowers material costs; and it eliminates the risk of sensor installation deviation and loosening, thus improving the mean time between failures (MTBF) of the temperature control system.

[0051] In some embodiments, the far-infrared core heater 1 further includes a heat-insulating / heat-absorbing filler 5, which fills the gap between the lower half of the hollow tube 2 and the heating wire 3 to reduce the temperature of the lower half of the hollow tube 2 to avoid carbonization of the matrix plug.

[0052] Furthermore, the high infrared emissivity filler 4 is filled in the gap between the upper half of the hollow tube 2 and the heating wire 3, and is arranged in sections above and below the heat insulation / heat absorption filler 5 inside the hollow tube 2.

[0053] Hollow tube 2 is divided into two sections from top to bottom. The upper section corresponds to the heating area of ​​the aerosol generation matrix, which needs to maintain efficient far-infrared radiation. The lower section corresponds to the contact area of ​​the cigarette plug (matrix fixing structure), which needs to be strictly temperature controlled. The ratio of the two ends can be 1:1, but it can also be adjusted appropriately according to the specific cigarette structure. There is no strict limitation on this.

[0054] Insert the heating wire 3 into the hollow tube 2, adjusting its position so that the effective heating section is in the upper half. The lower lead wire extends from the opening at the bottom of the hollow tube 2. Inject a high infrared emissivity slurry into the upper half of the hollow tube 2 using a precision syringe, then dry and sinter it to solidify. Replace the syringe and inject the heat insulation / heat absorption slurry from the lower opening, allowing it to solidify. The upper half of the hollow tube 2 is the high-temperature section, ensuring efficient heat conduction and infrared emission. The lower half is the low-temperature section, which can utilize porous composite ceramics and graphite to form a stable porous structure, maintaining heat insulation and heat absorption performance.

[0055] If only a single filler is used, the heat from the upper heating wire 3 will be continuously conducted downwards through the filler, causing the temperature of the lower half of the hollow tube 2 to rise with heating time. This results in the carbonization of the cigarette plug (usually made of cellulose acetate or paper) in contact with it (carbonization temperature is about 180℃), releasing a burnt odor. In this solution, the heat-insulating / heat-absorbing filler 5 in the low-temperature section solves this problem through a dual function: its porous structure blocks heat conduction, reducing the downward transfer of heat from the upper end; it absorbs residual heat, keeping the tube wall temperature in the low-temperature section stable at 120-140℃ (below the carbonization threshold of the plug).

[0056] The high-temperature and low-temperature sections work in tandem. The high-infrared emissivity filler 4 in the high-temperature section efficiently converts the heat energy of the heating wire 3 into far-infrared rays, which penetrate the tube wall and act on the tobacco leaves, ensuring efficient aerosol generation. The heat-insulating / heat-absorbing filler keeps the tube wall temperature below 140℃, and this section does not come into contact with the tobacco leaves (only with the plug), thus avoiding heating the tobacco leaves (preventing overheating) and preventing the plug from carbonizing, ensuring an odor-free smoking experience. The heat-insulating / heat-absorbing filler 5 is made of porous composite ceramic, high-purity porous graphite, or high-silica glass fiber composite material.

[0057] An aerosol generating apparatus is provided, the apparatus comprising a far-infrared core heater 1 as described in any of the preceding claims.

[0058] In summary, this application discloses a far-infrared core heater 1 for an aerosol generating device, which aims to solve the problems in existing heating technologies, such as scorching caused by contact between the heating element and the substrate, carbonization of the plug caused by overheating at the root, complex and costly temperature control, and unstable structural connection.

[0059] The heater 1 uses a hollow tube 2 as its core carrier, with a heating wire 3 inserted inside. The gap between the hollow tube 2 and the heating wire 3 is filled in functional sections: the upper section is filled with a high infrared emissivity material (such as silicon carbide or zirconium oxide), which can efficiently convert the heat energy of the heating wire 3 into far-infrared rays, penetrating the tube wall of the hollow tube 2 to achieve non-contact heating of the aerosol generation matrix; the lower section is filled with heat insulation / heat absorption material (such as porous composite ceramics or high-purity porous graphite), which blocks the downward conduction of heat and prevents the contact point with the cigarette plug from overheating and carbonizing, thus avoiding the generation of odors.

[0060] The heating wire 3 preferably has a spring-like structure to increase the heating area. In some designs, its top is equipped with an automatic centering electrode head 30, which matches the beveled top of the hollow tube 2 to ensure uniform gap. The heating wire 3 also has built-in TCR temperature sensing characteristics, enabling precise temperature control without the need for an external sensor. The lower end of the hollow tube 2 is inserted into the insertion cavity of the high-temperature resistant fixing base 6, and a strong connection is formed by the high-temperature resistant sealing material 7 to ensure structural stability.

[0061] The overall design, through collaborative innovation of "non-contact far-infrared heating + segmented temperature control + precise self-sensing temperature + stable assembly", not only improves heating uniformity and taste stability, but also simplifies the temperature control structure, reduces costs, and adapts to the practical needs of miniaturized aerosol generation devices.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, this utility model can have various modifications, combinations, and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A far-infrared core heater, characterized in that: The heater includes a hollow tube, a heating wire, a high infrared emissivity filler, and a high-temperature resistant mounting base; The hollow tube is made of a material that is resistant to high temperatures and has far-infrared transmittance or far-infrared excitation. The heating wire is inserted into the hollow part of the hollow tube. The high infrared emissivity filler fills the gap between the hollow tube and the heating wire to conduct the heat energy of the heating wire and excite itself to emit far-infrared rays. The far-infrared rays penetrate the tube wall of the needle-shaped hollow tube and act on the aerosol generation matrix, so that the heating wire and the matrix do not directly contact each other. The high-temperature resistant mounting base is installed at the lower end of the hollow tube.

2. The far-infrared core heater as described in claim 1, characterized in that: The hollow tube has a needle-like structure, with one end of the needle-like structure being either sharp or tapered, so as to be inserted into the aerosol generation matrix.

3. The far-infrared core heater as described in claim 2, characterized in that: The heating wire is spring-shaped, and the top of the heating wire has an automatically centered electrode head. The heating wire is guided by the electrode head in conjunction with the inclined surface at the top of the hollow tube to be centered inside the hollow tube, so that a uniform gap is formed between the heating wire and the inner wall of the hollow tube.

4. The far-infrared core heater as described in claim 3, characterized in that: The heating wire has built-in TCR temperature sensing characteristics, which are used to realize temperature detection and control.

5. The far-infrared core heater as described in claim 1, characterized in that: It also includes a heat-insulating / heat-absorbing filler, which fills the gap between the lower half of the hollow tube and the heating wire to reduce the temperature of the lower half of the hollow tube and prevent the substrate plug from carbonizing.

6. The far-infrared core heater as described in claim 5, characterized in that: The high infrared emissivity filler is filled in the gap between the upper half of the hollow tube and the heating wire, and is arranged in sections above and below the heat insulation / heat absorption filler inside the hollow tube.

7. The far-infrared core heater as described in claim 6, characterized in that: The high infrared emissivity filler is made of silicon carbide, alumina, or zirconium oxide; the heat insulation / heat absorption filler is made of porous composite ceramic, high-purity porous graphite, or high-silica glass fiber composite material.

8. The far-infrared core heater as described in claim 1, characterized in that: The high-temperature resistant fixing base has a plug-in cavity, the lower end of the hollow tube is inserted into the plug-in cavity, and a high-temperature resistant sealing material is fixed between the lower end of the hollow tube and the plug-in cavity.

9. The far-infrared core heater as described in claim 1, characterized in that: The hollow tube is made of quartz, zirconium oxide or silicon carbide.

10. An aerosol generating device, characterized in that: The device includes a far-infrared core heater as described in any one of claims 1-9.

Images