CN112385890A - Heating device for low-temperature cigarette - Google Patents
Heating device for low-temperature cigarette Download PDFInfo
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- CN112385890A CN112385890A CN201910955073.9A CN201910955073A CN112385890A CN 112385890 A CN112385890 A CN 112385890A CN 201910955073 A CN201910955073 A CN 201910955073A CN 112385890 A CN112385890 A CN 112385890A
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Abstract
本发明公开了一种用于低温卷烟的加热装置，包括底座、加热部和两端开口的筒体；其中，底座用于支撑低温卷烟，将火焰与低温卷烟隔开，并将来自火焰的热量传递至加热部；加热部包括多个加热肋片，多个加热肋片的第一侧壁共同连接在一起，且相邻的加热肋片之间设置有用于容纳烟草的腔体，多个加热肋片的底端分别与底座连接，加热部用于插设在低温卷烟的内部以加热低温卷烟；筒体间隔套设在加热部的外部，筒体的内壁与多个加热肋片的第二侧壁之间形成有用于固定低温卷烟的夹层，筒体的底端与底座连接。本发明能够增大与低温卷烟的接触面积，从而使热量更为均匀地传递到烟草中，提高低温卷烟的温度均匀性，且平均温度高，从而能够提高加热效率。
The invention discloses a heating device for low-temperature cigarettes, comprising a base, a heating part and a cylinder body with openings at both ends; wherein, the base is used for supporting the low-temperature cigarette, separating the flame from the low-temperature cigarette, and dissipating the heat from the flame It is transferred to the heating part; the heating part includes a plurality of heating fins, the first side walls of the plurality of heating fins are connected together, and a cavity for accommodating tobacco is arranged between the adjacent heating fins, and the plurality of heating fins are The bottom ends of the fins are respectively connected with the base, and the heating part is used to be inserted into the interior of the low-temperature cigarette to heat the low-temperature cigarette; An interlayer for fixing the low-temperature cigarette is formed between the side walls, and the bottom end of the cylinder body is connected with the base. The invention can increase the contact area with the low-temperature cigarette, so that the heat can be transferred to the tobacco more uniformly, the temperature uniformity of the low-temperature cigarette is improved, and the average temperature is high, so that the heating efficiency can be improved.
Description
Technical Field
The invention relates to a heating device for low-temperature cigarettes, and belongs to the technical field of low-temperature cigarettes.
Background
Cigarettes are the most common smoking articles, and typically are prepared by baking tobacco, shredding the tobacco, and rolling the paper into a cylindrical form. A filter is also typically provided at the suction end. When smoking, one end is ignited, and the generated smoke is sucked out from the other end through a mouth. Nicotine (nicotine) contained in the smoke enters the blood through the respiratory system, and stimulates nerve cells in the brain to secrete dopamine to produce a pleasant feeling. However, conventional tobacco often contains a large amount of harmful substances such as tar. In order to reduce the harm of tobacco and improve public environmental health, related researchers have proposed a new type of smoking article, low-temperature cigarette (heat non-combustion cigarette).
At present, the heating mode of low-temperature cigarettes is mostly an electric heating mode, a heating component of the low-temperature cigarettes mainly has a needle (rod) shape, and a resistance wire or a resistance sheet is directly buried inside a heating needle and a heating fin. Although the related art proposes a solution of heating tobacco liquid or baking tobacco shreds by heat released by burning fuel, for example, chinese patent application CN201420057088.6 discloses a lighter type fuel-heated cigarette, and chinese patent application CN201621111124.8 discloses a gas-heated smoking article, both of which are solutions of indirectly heating a low-temperature cigarette by burning liquid fuel such as butane, these fuel-burning-based heating assemblies still adopt a structure similar to that of electric heating without major changes, which greatly affect heating efficiency, speed of smoke output during use and uniformity of low-temperature cigarette baking, thereby indirectly affecting user smoking experience and harmful substance generation.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a heating device for low-temperature cigarettes, which can increase the contact area with the low-temperature cigarettes, thereby transferring heat more uniformly to the tobacco, improving the temperature uniformity of the low-temperature cigarettes, and increasing the average temperature, thereby improving the heating efficiency.
In order to achieve the purpose, the invention provides a heating device for low-temperature cigarettes, which comprises a base, a heating part and a cylinder body with openings at two ends; the base is used for supporting a low-temperature cigarette, separating a flame from the low-temperature cigarette and transferring heat from the flame to the heating part; the heating part comprises a plurality of heating fins, first side walls of the heating fins are connected together, cavities for containing tobacco are arranged between the adjacent heating fins, the bottom ends of the heating fins are respectively connected with the base, and the heating part is used for being inserted into the low-temperature cigarette to heat the low-temperature cigarette; the barrel is sleeved outside the heating part at intervals, an interlayer used for fixing the low-temperature cigarettes is formed between the inner wall of the barrel and the second side walls of the plurality of heating fins, and the bottom end of the barrel is connected with the base.
In one embodiment, the cavity penetrates top and bottom ends of the heating part.
In one embodiment, the heating part has a cross-section in a shape of a cross.
In one embodiment, the heating section has a cross-section in the shape of a Chinese character 'mi'.
In a particular embodiment, the surface of the heating element is provided with an oxidation resistant portion.
In a particular embodiment, the oxidation resistant portion is made of a nickel and/or chromium material.
In one embodiment, the thickness of the heating fins is 0.1-0.6 mm.
In a specific embodiment, the thickness of the heating element is 0.268 mm.
In one specific embodiment, the length of the heating part is 1/2-4/5 of the length of the cylinder body.
In one embodiment, the length of the heating part is 10-15 mm.
In one embodiment, the length of the heating portion is 12 mm.
In a specific embodiment, a tip is provided on a top of the heating part.
In one embodiment, the tip has a length of 1 to 3 mm.
In one embodiment, the tip has a length of 2 millimeters.
In one embodiment, the heating fins are made of one or more of copper, brass, aluminum, stainless steel, aluminum oxide, and silicon carbide.
In one embodiment, the heating fins 21 have a thermal conductivity of 271 to 504W/m.degree, the heating fins 21 have a specific heat capacity of 0.27 to 0.51 KJ/kg.Kelvin, and the heating fins 21 have a density of 6285 to 11671 kg/m.
In one embodiment, the base is made of a thermally conductive material.
In one embodiment, the base is made of one or more of copper, brass, aluminum oxide, and silicon carbide.
In one embodiment, the cylinder is made of a ceramic material.
In a specific embodiment, the heat conductivity coefficient of the low-temperature cigarette is 0.050-0.092W/m.degree, the specific heat capacity of the low-temperature cigarette is 0.164-0.304 kilojoule/kg.Kelvin, and the bulk density of the low-temperature cigarette is 350-650 kg/cubic meter.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the heating part comprises a plurality of heating fins, the first side walls of the heating fins are connected together, and cavities for containing tobacco are arranged between the adjacent heating fins, so that the contact area of the heating part and the low-temperature cigarette can be increased, heat can be uniformly transferred to the tobacco, the temperature uniformity of the low-temperature cigarette is improved, the average temperature is high, and the heating efficiency can be improved. 2. The invention can improve the thermal efficiency of fuel heating, thereby reducing the consumption rate of fuel and improving the multi-branch continuous pumping capacity of the heating device. 3. The cavity body of the invention runs through the top end and the bottom end of the heating part, so that the contact area between each heating fin and the low-temperature cigarette can be further increased, the heat can be more uniformly transferred to the tobacco, the temperature uniformity of the low-temperature cigarette can be further improved, and the heating effect is good. 4. The surface of the heating fin is provided with the oxidation resisting part, so that the heating fin can be prevented from being oxidized, and the heating effect can be further improved. 5. The side wall thickness of the heating fin is 0.1-0.6 mm, so that the heating uniformity can be improved, and the time required by preheating low-temperature cigarettes is reduced. 6. The length of the heating part is 1/2-4/5 of the length of the cylinder body, so that the heating uniformity can be further improved, and the time required by preheating the low-temperature cigarette can be further reduced. 7. The top of the heating part is provided with the tip, so that the heating part can be conveniently inserted into a low-temperature cigarette. 8. The invention has high mechanical strength and good reliability. 9. The invention has simple structure, convenient use and good economical efficiency.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the following briefly introduces the drawings required in the description of the embodiments:
fig. 1 is a schematic structural view of one embodiment of the heating device for low-temperature cigarettes of the present invention (for convenience of illustration, the barrel is shown only half-sectioned along its longitudinal axis);
FIG. 2 is a schematic structural view of another embodiment of the heating device for low temperature cigarettes of the present invention (for convenience of illustration, the barrel is shown only half sectioned along its longitudinal axis);
FIG. 3 is a schematic representation of the maximum low temperature cigarette maximum temperature as a function of time as it is heated by the heating apparatus of one embodiment of the present invention and the two control group heating apparatus;
FIG. 4 is a schematic diagram of the average temperature of the low temperature cigarettes as heated over time with a heating device of one embodiment of the present invention and a two control heating device;
fig. 5 is a schematic view showing the change in volume fraction over time of the heating device and the two control heating devices in the optimal temperature range inside the low-temperature cigarette when heating.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
As shown in fig. 1 and 2, the heating device for low-temperature cigarettes provided by the invention comprises a base 1, a heating part 2 and a cylinder 3 with two open ends. Wherein, base 1 is used for supporting the low temperature cigarette to separate flame and low temperature cigarette, prevent that the low temperature cigarette is lighted by flame. The base 1 can absorb heat released by combustion of fuel and transfer the heat to the heating portion 2. The heating part 2 comprises a plurality of heating fins 21, the first side walls of the plurality of heating fins 21 are connected together, a cavity 22 for accommodating tobacco is arranged between the adjacent heating fins 21, and the contact area between the heating part 2 and the low-temperature cigarette can be increased. The bottom ends of the plurality of heating fins 21 are respectively connected with the base 1, and the heating part 2 is used for being inserted into the low-temperature cigarette to heat the low-temperature cigarette. Barrel 3 interval cover is established in the outside of heating portion 2, is formed with the intermediate layer 4 that is used for fixed low temperature cigarette between the inner wall of barrel 3 and the second lateral wall of a plurality of heating fin piece 21, and the bottom of barrel 3 is connected with base 1, and barrel 3 can reduce the heat dissipation of low temperature cigarette lateral part to the external environment. When the cigarette heating device is used, the heating part 2 is inserted into a low-temperature cigarette, heat generated by fuel combustion heats the base 1, then the heat is conducted along each heating fin 21 and is transmitted from the bottom to the top of each heating fin 21, and tobacco is heated through the surface of each heating fin 21. Compare in heating needle (stick) structure, a plurality of heating fins 21 can increase with the area of contact of low temperature cigarette for during the heat more transmits the tobacco to the tobacco uniformly, improve the temperature homogeneity of low temperature cigarette, and average temperature is high, thereby can improve heating efficiency. Further, the heating device can improve the heat efficiency of fuel heating, thereby reducing the consumption rate of fuel and improving the multi-branch continuous pumping capacity of the heating device.
In a specific embodiment, the cavity 22 penetrates through the top end and the bottom end of the heating portion 2, so that the contact area between the adjacent heating fins 21 and the low-temperature cigarette can be further increased, heat can be more uniformly transferred to the tobacco, and the temperature uniformity of the low-temperature cigarette can be further improved.
In a specific embodiment, the surface of the heating rib 21 is provided with an oxidation resistant portion capable of preventing the heating rib 21 from being oxidized.
In a particular embodiment, the oxidation resistant portion is made of a nickel and/or chromium material.
In a specific embodiment, the cross-section of the heating section 2 is arranged in a cross-shape (as shown in fig. 1).
In a particular embodiment, the cross-section of the heating section 2 is arranged in a "meter" shape (as shown in fig. 2).
In a specific embodiment, the thickness of the heating fins 21 is 0.1-0.5 mm, which can improve the heating uniformity and reduce the time required for preheating the low-temperature cigarette. Preferably, the thickness of the heating ribs 21 is 0.268 mm.
In a specific embodiment, the length of the heating part 2 is 1/2-4/5 of the length of the cylinder 3, so that the heating uniformity can be further improved, and the time required by preheating the low-temperature cigarette can be further reduced.
In a specific embodiment, the length of the heating part 2 is 10 to 15 mm. Preferably, the length of the heating part 2 is 12 mm.
In a particular embodiment, the heating ribs 21 are all the same length.
In a particular embodiment, the top of heating section 2 is provided with a pointed end 23 to facilitate insertion of heating section 2 into a low temperature cigarette.
In one embodiment, the tip 23 has a length of 1 to 3 mm. Preferably, the tip 23 is 2 mm in length.
In a particular embodiment, the heating fins 21 are made of one or more of copper, brass, aluminum, stainless steel, alumina, and silicon carbide.
In a specific embodiment, the heat conductivity of the heating fins 21 is 271-504W/m.degree, the specific heat capacity of the heating fins 21 is 0.27-0.51 KJ/kg.Kelvin, and the density of the heating fins 21 is 6285-11671 kg/cubic meter. Preferably, the heating elements 21 have a thermal conductivity of 387.6 watts per meter-degree, the heating elements 21 have a specific heat capacity of 0.39 kilojoules per kilogram-kelvin, and the heating elements 21 have a density of 8978 kilograms per cubic meter.
In a particular embodiment, the base 1 is made of a thermally conductive material.
In a specific embodiment, the base 1 is made of one or more of copper, brass, aluminum oxide, and silicon carbide.
In a particular embodiment, the cross-section of the base 1 is arranged to be circular.
In a particular embodiment, the diameter of the low temperature cigarette is smaller than the diameter of the base 1. Preferably, the diameter of the base is 8 mm, and the diameter of the low-temperature cigarette is 7.9 mm.
In a particular embodiment, the cylinder 3 is made of a ceramic material.
In a specific embodiment, the heat conductivity coefficient of the low-temperature cigarette is 0.050-0.092W/m.degree, the specific heat capacity of the low-temperature cigarette is 0.164-0.304 kilojoule/kg.Kelvin, and the bulk density of the low-temperature cigarette is 350-650 kg/cubic meter. Preferably, the heat conductivity coefficient of the low-temperature cigarette is 0.071 watt/meter-degree, the specific heat capacity of the low-temperature cigarette is 0.234 kilojoule/kilogram-Kelvin, and the bulk density of the low-temperature cigarette is 500 kilograms/cubic meter.
In one particular embodiment, the fuel is liquid butane.
In a specific embodiment, the total heating power of the low temperature cigarette is 2W (Watts).
The heating device of the embodiment is provided, and the cross section of the heating part 2 is arranged in a cross shape. Two additional control groups were provided, the heating elements of one heating device were arranged in a circular cross-section (heating needle (rod)) having a diameter of 2 mm, and the heating elements of the other heating device were arranged in a rectangular cross-section (sheet heating configuration) having a thickness of 0.524 mm and a width of 6 mm. Meanwhile, the total length of each heating element and the heating part 2 is ensured to be 12 mm, and the cross sectional area of each heating element and the cross sectional area of the heating part 2 are equal to each other and are 3.14 square mm.
The three heating devices are adopted to heat the low-temperature cigarette, and the numerical simulation is carried out on the dynamic process of starting heating from 300K (Kelvin, which is equivalent to normal temperature) by using FLUNET software. Wherein, the changes of the volume ratio of the average temperature of the low-temperature cigarette, the maximum value of the temperature of the low-temperature cigarette and the optimal temperature of the low-temperature cigarette (namely the volume fraction of the low-temperature cigarette in the optimal temperature range) along with the time are respectively shown in figures 3-5.
Figure 3 shows the internal temperature maximum of a low temperature cigarette over time after heating has commenced. As can be seen from fig. 3, the maximum temperature in the low temperature cigarette rises most rapidly with the needle (rod) -shaped heating element, and the lowest smokable temperature (220 ℃ (celsius)) of the low temperature cigarette can be reached at 20s (seconds), however, it takes longer to start smoking in actual use due to the uneven temperature distribution. Also at 40 seconds, the needle-like heating element reaches a maximum smokable temperature of 350 degrees celsius, above which overheating can result, affecting the smoking comfort. The cross-shaped heating part can keep a slow temperature rise, and the time required from the beginning of heating to the time when the cross-shaped heating part can suck is shorter than that of the needle-shaped heating element according to the following data, so that the heating effect is good. The heating effect of the sheet heating element as one of the control groups is located therebetween.
FIG. 4 shows the average temperature inside a low temperature cigarette as a function of time after heating has begun. As can be seen from fig. 4, the cross-shaped heating portion has a higher average temperature of the low-temperature cigarettes, and then the average temperature of the low-temperature cigarettes using the sheet-shaped heating elements is the lowest average temperature of the low-temperature cigarettes using the needle-shaped heating elements. The cross-shaped heating part can be shown to have the maximum heat conduction efficiency, the heating efficiency is improved, and the continuous pumping time after each fuel filling can be greatly prolonged.
Figure 5 shows the change in volume ratio over time for the optimum temperature range in a low temperature cigarette after heating has commenced. As can be seen from FIG. 5, the optimal temperature range of the low-temperature cigarette is defined as 220-350 ℃, and in the temperature range, the low-temperature cigarette can not generate too many harmful substances during smoking. As can be seen from fig. 5, the cross-shaped heating portion can rapidly increase the optimal temperature-volume ratio of the low-temperature cigarette after a period of time. The optimum temperature-volume ratio required for suction can be reached more quickly than with sheet-like and needle-like heating elements.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (20)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910955073.9A CN112385890A (en) | 2019-10-09 | 2019-10-09 | Heating device for low-temperature cigarette |
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| CN201910955073.9A CN112385890A (en) | 2019-10-09 | 2019-10-09 | Heating device for low-temperature cigarette |
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| CN201910955073.9A Pending CN112385890A (en) | 2019-10-09 | 2019-10-09 | Heating device for low-temperature cigarette |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112244367A (en) * | 2019-07-22 | 2021-01-22 | 湖北中烟工业有限责任公司 | A heating body and its preparation method and a smoking device with the heating body |
| CN112971218A (en) * | 2021-03-11 | 2021-06-18 | 深圳麦克韦尔科技有限公司 | Aerosol generating device and heating device thereof |
| WO2024024083A1 (en) * | 2022-07-29 | 2024-02-01 | 日本たばこ産業株式会社 | Reconstituted tobacco for non-combustion heating-type flavor inhaler and method for manufacturing same, non-combustion heating-type flavor inhaler, and non-combustion heating-type flavor inhaling system |
| WO2024024081A1 (en) * | 2022-07-29 | 2024-02-01 | 日本たばこ産業株式会社 | Reconstituted tobacco for non-combustion heating-type flavor inhaler and method for manufacturing same, non-combustion heating-type flavor inhaler, and non-combustion heating-type flavor inhaling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112971218A (en) * | 2021-03-11 | 2021-06-18 | 深圳麦克韦尔科技有限公司 | Aerosol generating device and heating device thereof |
| WO2022188715A1 (en) * | 2021-03-11 | 2022-09-15 | 深圳麦克韦尔科技有限公司 | Aerosol generating apparatus and heating device thereof |
| WO2024024083A1 (en) * | 2022-07-29 | 2024-02-01 | 日本たばこ産業株式会社 | Reconstituted tobacco for non-combustion heating-type flavor inhaler and method for manufacturing same, non-combustion heating-type flavor inhaler, and non-combustion heating-type flavor inhaling system |
| WO2024024081A1 (en) * | 2022-07-29 | 2024-02-01 | 日本たばこ産業株式会社 | Reconstituted tobacco for non-combustion heating-type flavor inhaler and method for manufacturing same, non-combustion heating-type flavor inhaler, and non-combustion heating-type flavor inhaling system |
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