WO2021208269A1 - 内热式电子烟加热的电加热层结构 - Google Patents

内热式电子烟加热的电加热层结构 Download PDF

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Publication number
WO2021208269A1
WO2021208269A1 PCT/CN2020/100594 CN2020100594W WO2021208269A1 WO 2021208269 A1 WO2021208269 A1 WO 2021208269A1 CN 2020100594 W CN2020100594 W CN 2020100594W WO 2021208269 A1 WO2021208269 A1 WO 2021208269A1
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heating
resistor layer
layer
electronic cigarette
rod
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PCT/CN2020/100594
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English (en)
French (fr)
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姚剑浩
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嘉兴微知电子有限公司
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Priority to CN202080004654.5A priority Critical patent/CN115426906A/zh
Publication of WO2021208269A1 publication Critical patent/WO2021208269A1/zh

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means

Definitions

  • the utility model relates to a structure of components of an electronic cigarette, and an electric heating structure of an internal heating type electronic cigarette heating rod.
  • the internal heating type e-cigarette heating rod is used to insert a special baking type cigarette to bake the tobacco to produce smoke for people to smoke. During the curing process, the tobacco does not burn and does not form soot without an open flame.
  • Toasted cigarettes are shorter than ordinary cigarettes, with a length of about 15mm and a diameter of about 8mm. Since the internal heating type electronic cigarette heating rod needs to be inserted into the cigarette to heat, the diameter is generally about 2mm, and the heating voltage is a DC voltage less than 4V.
  • Tobacco roasting temperature is 280 ⁇ 350°C, if the temperature is too high, it will burn, and if it is too low, it will not produce smoke.
  • the ideal heating length of the internal heating type electronic cigarette heating rod is 10-12mm. If the temperature of the heating zone is controlled at 330 ⁇ 10°C, the taste saturation, smoke, and amount of smoke will be very good.
  • Chinese patent 201820069756.5 introduces the structure of a round rod-shaped ceramic heating element for electronic cigarettes.
  • the ceramic rod core is provided with a ceramic substrate on the outermost side, a heating circuit is provided on the inner side of the ceramic substrate, and a ceramic substrate on the inner side of the heating circuit.
  • a temperature measurement line is set between the No. 2 ceramic substrate and the ceramic rod core.
  • Chinese patent 201822100129.6 introduces a needle type electronic cigarette heater, which includes a needle-shaped metal substrate and a thick film heating layer.
  • the thick film heating layer includes an insulating layer and a heating circuit layer disposed above the insulating layer.
  • Such existing heating rods for electronic cigarettes do not consider the problem of axial temperature difference. When in use, the head and tail of the heating rod are too low in temperature due to fast heat dissipation, and the middle part of the heating rod is slow in heat dissipation and therefore the temperature is too high.
  • the utility model aims at proposing an internal heating type electronic cigarette heating rod structure, which can obtain the heating effect of uniform axial temperature.
  • the electric heating layer structure of the internal heating type electronic cigarette heating rod is attached to the surface of the base rod 1.
  • the direction perpendicular to the axis of the base rod 1 on the two resistance layers is called the horizontal direction.
  • Electrode 3 the first resistance layer and the second resistance layer each include a resistance layer body; the resistance layer body is provided with a plurality of lateral first slits 41a drawn from the left side of the resistance layer body and the right side of the resistance layer body
  • the lengths of the lateral second slit 41b, the first slit 41a and the second slit 41b are less than the width of the resistance layer body, and the first slit 41a and the second slit 41b are alternately arranged along the axis direction to divide the resistance layer body Into a number of horizontal bars connected in series.
  • the width of the horizontal bar 43 at the upper part and the horizontal bar 44 at the lower part is smaller than the width of the horizontal bar 42 in the middle.
  • the resistance layer body of the first resistance layer and the resistance layer body of the second resistance layer are the same.
  • the base rod 1 is cylindrical, and the resistance layer body of the first resistance layer and the resistance layer body of the second resistance layer are both semi-cylindrical surfaces.
  • the internal heating type electronic cigarette heating rod adopting the electric heating structure of the present utility model includes a ceramic cylindrical base rod, the upper end of the base rod is tapered, and the cylindrical surface of the base rod is provided with a layer of glass isolation layer, glass isolation layer There is an electric heating layer outside, and a glass protective layer outside the electric heating layer.
  • the electric heating layer includes two semi-cylindrical resistance layers, the upper ends of the two semi-cylindrical resistance layers are connected to each other, and the lower ends of the two semi-cylindrical resistance layers each have an lead electrode, each The left and right sides of the semi-cylindrical resistive layer are distributed with transverse slits.
  • the length of these transverse slits is less than the width of the semi-cylindrical resistive layer.
  • the transverse slits on the left and right sides are spaced apart.
  • the semi-cylindrical resistance layer is divided into horizontal bars connected in series.
  • the horizontal bars located at the upper part of the base rod and the horizontal bars located at the lower part of the base rod have a narrow width, and the width of the horizontal bar located in the middle of the base rod Wider.
  • This kind of internal heating type electronic cigarette heating rod has a larger resistance because the width of the upper and lower horizontal bars of the base rod is narrow; the width of the horizontal bar located in the middle of the base rod is wider, and the resistance is smaller; The horizontal bars on the same semi-cylindrical surface are connected in series, and the current is the same when energized. Therefore, the heat per unit area of the upper and lower horizontal bars of the base rod is larger than that of the central bar, which can compensate the heating rod. There is more heat lost at the head and tail, so that the temperature of the whole internally heated electronic cigarette heating rod is even, and a good heating effect is obtained.
  • the utility model has the advantages that it can compensate the heat lost by the head and tail of the heating rod, so that the temperature of the whole internal heating type electronic cigarette heating rod is uniform, and a good heating effect is obtained.
  • Figure 1 is a front view of an internally heated electronic cigarette heating rod
  • Figure 2 is a back view of the internal heating type electronic cigarette heating rod
  • Figure 3 is a side view of the internal heating type electronic cigarette heating rod
  • Figure 4 is an expanded view of the electric heating layer, the glass isolation layer and the glass protection layer;
  • Figure 5 is a front view of the base rod
  • Figure 6 is a front view of the base rod after sintering the glass isolation layer
  • Figure 7 is a perspective view of the base when the viewing angle is obliquely upward
  • Figure 8 is a perspective view of the base when the viewing angle is obliquely downward
  • Figure 9 is a bottom view of the base
  • Figure 10 is a cross-sectional view of the base A-A
  • Figure 11 is a structural diagram of an internally heated electronic cigarette heating rod with a base installed
  • Figure 12 is a perspective view of an internally heated electronic cigarette heating rod with a base and lead wires installed.
  • the internal heating type electronic cigarette heating rod adopting the electric heating structure of the present invention includes a ceramic cylindrical base rod 1, and the upper end 11 of the base rod 1 is tapered to facilitate Insert the cigarette.
  • the electric heating layer includes two semi-cylindrical resistance layers 4, the upper ends of the two semi-cylindrical resistance layers 4 are connected, and the lower ends of the two semi-cylindrical resistance layers 4 each have a lead electrode 3.
  • each semi-cylindrical resistive layer 4 is provided with a plurality of lateral first slits 41a drawn from the left side of the resistive layer body and transverse second slits 41a drawn from the right side of the resistive layer body.
  • the lengths of the first slit 41a and the second slit 41b are less than the width of the resistance layer body, and the first slit 41a and the second slit 41b are alternately arranged along the axis direction, dividing the resistance layer body into several horizontal strips connected in series.
  • the semi-cylindrical resistance layer 4 into a "bow"-shaped structure; among the above-mentioned horizontal bars, the horizontal bars 43 located at the upper part of the base rod and the horizontal bars 44 at the lower part have a narrow width, and the horizontal bar located in the middle of the base rod The width of 42 is wider.
  • the length of the glass isolation layer 2 is greater than the resistance layer 4 plus the length of the lead electrode 3.
  • the glass isolation layer separates the resistance layer and the lead electrode from the base rod 1; the glass protective layer 5 should be shorter, and the glass The lower edge of the protective layer does not cover the lower half of the lead electrode 3.
  • This electronic cigarette heating rod can also include a square base 6 as shown in Figures 7 and 8.
  • the center of the base has a circular hole 61 that can be sleeved on the base rod 1, and the bottom surface of the base 6
  • the base 6 is sleeved and fixed on the lower part of the base rod 1, located outside the lead electrode 3, and two L-shaped bumps 62 are respectively facing the lower half of the lead electrode 3.
  • the base 6 is used to fix the e-cigarette heating rod to the smoking set.
  • the gap between the inner concave portion 63 of the L-shaped bump 62 on the bottom surface of the base 6 and the lead electrode 3 can be used to install lead wires: 6 sets of base After being combined and fixed to the lower part of the base rod 1, some conductive paste is injected into the concave portion 63 of the L-shaped bump 62, and one end of the lead wire 7 is inserted into the concave portion 63 of the L-shaped bump 62. After sintering, it is drawn out The wire 7 is fixed to the lead electrode 3, and becomes the structure shown in FIG. 12.
  • the base rod 1 and base 6 of this internally heated electronic cigarette heating rod can be made of various ceramics, such as alumina ceramics, silica ceramics, and zirconia ceramics. Zirconia ceramics are preferred because of the thermal conductivity of zirconia ceramics. Very low, generally 2 ⁇ 3W/(m ⁇ K), which can effectively increase the heating rate, reduce the heat transfer loss at the base, and reduce the energy consumption.
  • the resistance layer 4 and the lead electrode 3 can be made of silver-palladium paste with a high TCR value.
  • the glass isolation layer 2 and the glass protection layer 5 are used to protect the resistance layer 4 from being oxidized.
  • the resistance layer 4 of this internally heated electronic cigarette heating rod can be made by a high-precision cylindrical thick film printing method, or it can be printed on a flat aluminum oxide or zirconium oxide film and then wrapped on a zirconium oxide rod for co-fired Method to make.
  • the process flow produced by the high-precision cylindrical thick film printing method is as follows: (1) Print the bottom non-porous glass isolation layer paste on the zirconia ceramic base rod shown in Figure 5; (2) Sinter at 850°C to obtain glass isolation Layer 2 becomes the structure shown in Fig.
  • the reference size of the internal heating type electronic cigarette heating rod is: the base rod 1 is 20 mm long and 1.7-2.5 mm in diameter; the resistance layer area is 12 to 13 mm long and the electrode area is 4.5 mm long.
  • Each semi-cylindrical resistance layer 4 has 13-16 horizontal bars, and the lower horizontal bar 44 has 6 bars, each with a width of 0.4-0.45mm and a line gap of 0.1-0.2mm; the upper horizontal bar 43 has 2 strips, each with a width of 0.4 ⁇ 0.45mm and a line gap of 0.15mm; the rest are horizontal bars 42 in the middle, each with a width of 0.9 ⁇ 1.1mm and a line gap of 0.15 ⁇ 0.2mm.
  • the wiring length of the heating zone is about 13mm, a 330 ⁇ 10°C constant temperature zone with a length greater than 10mm can be obtained, which meets the requirements of the internally heated electronic cigarette heating rod for the temperature field.
  • the width of the lead electrode is 2mm, and the resistance is small.
  • the heating of the resistance layer is stable at 330°C, the temperature of the base is less than 100°C, so that the heat loss at the tail of the heating rod is small.
  • the TCR value of the silver palladium paste is 1500 ⁇ 3000ppm/°C, and the design resistance is 0.6 ⁇ 0.8 ⁇ under the environment of 25°C. The resistance rises linearly with the temperature after power-on and heating, and the temperature of the heating zone can be determined by detecting the current resistance value.
  • this internal heating type electronic cigarette heating rod is: when the resistance is 0.6 ⁇ at normal temperature, after applying a voltage of 3.7V, the lower horizontal bar 44 near the base provides a sufficiently fast heating speed, which can be in 3 seconds Raise the temperature of the place to 350°C within and quickly roast the shredded tobacco, which is equivalent to lighting the head first in the traditional smoking process, which can achieve rapid smoking; after the temperature rises, the TCR effect makes the resistance increase and the power drops rapidly, which can be controlled by the control circuit Adjust the applied voltage according to the detected current resistance (that is, the current temperature).
  • the temperature at the middle bar 42 gradually rises, and the lower bar 44 area near the base follows As the voltage drops, the temperature gradually balances with the central area.
  • the temperature in the 10mm constant temperature zone can be maintained at about 330°C after 20 seconds of electrification, ensuring a consistent taste during the suction process.
  • the 330°C constant temperature zone reaches a length of 10mm, the heating rod consumes only about 3W, which meets the low power consumption requirements of the internally heated electronic cigarette heating rod.

Abstract

内热式电子烟加热棒的电加热层结构，贴附于基杆(1)表面，包括两个薄膜状的相互电绝缘的第一电阻层和第二电阻层，第一电阻层和第二电阻层上垂直于基杆(1)的轴线方向称为横向，第一电阻层和第二电阻层的轴向上端互相电相连，第一电阻层和第二电阻层的轴向下端各有一个引出电极(3)，第一电阻层和第二电阻层各自包含一个电阻层本体；电阻层本体上设置有若干条自电阻层本体左侧边引出的横向的第一缝(41a)和自电阻层本体的右侧边引出的横向的第二缝(41b)，第一缝(41a)和第二缝(41b)的长度均小于电阻层本体的宽度，且沿轴线方向第一缝(41a)和第二缝(41b)交替排列，将电阻层本体分割成互相串联的若干横条。内热式电子烟加热棒的电加热层结构能补偿加热棒的头部和尾部较多散失的热量，从而使整根内热式电子烟加热棒温度均匀。

Description

内热式电子烟加热的电加热层结构 技术领域
本实用新型涉及一种电子烟具的部件的结构，一种内热式电子烟加热棒的电加热结构。
背景技术
内热式电子烟加热棒是用来插在特制的烘烤式香烟中对烟草进行烘烤产生供人吸用的烟气的。烘烤过程中，烟草不燃烧，没有明火也不形成烟灰。烘烤式香烟比一般的香烟短，烟丝段长度约15mm、直径8mm左右。内热式电子烟加热棒由于要插在烟支里面加热，一般直径在2mm左右，加热电压为小于4V的直流电压。烟支烘烤温度为280～350℃，温度过高就会烤焦，太低则烤不出烟味道。内热式电子烟加热棒理想的发热长度为10～12mm。发热区温度如控制在330±10℃，烟的口感饱和度、烟气、烟雾量就会很好。
中国专利201820069756.5介绍了一种电子烟用圆棒状陶瓷发热体的结构，在陶瓷棒芯最外侧设有一号陶瓷基片，一号陶瓷基片内侧设发热线路，发热线路内侧设有二号陶瓷基片，二号陶瓷基片与陶瓷棒芯中间设有测温线。中国专利201822100129.6介绍了一种针式电子烟加热器，包括针状金属基材和厚膜加热层，厚膜加热层包括绝缘层、设置于绝缘层上方的加热电路层。这类已有的电子烟加热棒皆没有考虑轴向温度差的问题，存在使用时加热棒的头部和尾部因散热快而温度过低、加热棒的中部散热慢因而温度过高的弊病。
发明内容
本实用新型旨在提出一种内热式电子烟加热棒的结构，能得到轴向温度均匀的加热效果。
内热式电子烟加热棒的电加热层结构，贴附于基杆1表面，其特征在于：包括两个薄膜状的相互电绝缘的第一电阻层和第二电阻层，第一电阻层和第二电阻层上垂直于基杆1的轴线方向称为横向，第一电阻层和第二电阻层的轴向上端互相电相连，第一电阻层和第二电阻层的轴向下端各有一个引出电极3，第一电阻层和第二电阻层各自包含一个电阻层本体；电阻层本体上设置有若干条自电阻层本体左侧边引出的横向的第一缝41a和自电阻层本体的右侧边引出的横向的第二缝41b,第一缝41a和第二缝41b的长度均小于电阻层本体的宽度，且沿轴线方向第一缝41a和第二缝41b交替排列，将电阻层本体分割成互相串联的若干横条。
优选地，位于上部的横条43和下部的横条44的宽度小于位中部的横条42的宽度。
优选地，第一电阻层的电阻层本体和第二电阻层的电阻层本体是相同的。
优选地，基杆1是圆柱形，第一电阻层的电阻层本体和第二电阻层的电阻层本体均为半圆柱面。
采用本实用新型的电加热结构的内热式电子烟加热棒，包括一根陶瓷的圆柱形的基杆，基杆的上端成锥形，基杆的圆柱面上有一层玻璃隔离层，玻璃隔离层外有一层电加热层，电加热层外有一层玻璃保护层。所述的电加热层包括两个半圆柱面形的电阻层，两个半圆柱面形的电阻层的上端互相相连，两个半圆柱面形的电阻层的下端各有一个引出电极，每个半圆柱面形的电阻层的左侧边和右侧边上分布着横向的缝，这些横向的缝的长度小于半圆柱面形的电阻层的宽度，左、右侧边上横向的缝相间隔排列，将半圆柱面形的电阻层分割成互相串联的横条，位于基杆的上部的横条和位于基杆的下部的横条的宽度较窄，位于基杆的中部的横条的宽度较宽。
这种内热式电子烟加热棒由于位于基杆的上部的横条和下部的横条的宽度较窄，电阻就较大；位于基杆的中部的横条的宽度较宽，电阻就较小；同一半圆柱面上的横条是互相串联的，通电时电流相同，因此位于基杆的上部的横条和下部的横条的单位面积的发热量较中部的横条大，就能补偿加热棒的头部和尾部较多散失的热量，从而使整根内热式电子烟加热棒温度均匀，得到好的加热效果。
本实用新型的优点是：能补偿加热棒的头部和尾部较多散失的热量，从而使整根内热式电子烟加热棒温度均匀，得到好的加热效果。
附图说明
图1为内热式电子烟加热棒的正向视图；
图2为内热式电子烟加热棒的背向视图；
图3为内热式电子烟加热棒的侧向视图；
图4为电加热层、玻璃隔离层和玻璃保护层的展开图；
图5为基杆的正向视图；
图6为烧结了玻璃隔离层后的基杆的正向视图；
图7为视角斜上方时基座的立体图；
图8为视角斜下方时基座的立体图；
图9为基座的仰视图；
图10为基座的A-A剖视图；
图11为安装了基座的内热式电子烟加热棒的结构图；
图12为安装了基座和引出导线的内热式电子烟加热棒的立体图。
具体实施方式
如图1、图2和图3所示，采用本实用新型的电加热结构的内热式电子烟加热棒包括一根陶瓷的圆柱形的基杆1，基杆1的上端11成锥形，便于插入香烟中。基杆1的圆柱面上有一层玻璃隔离层2，玻璃隔离层外有一层电加热层，电加热层外有一层玻璃保护层5。电加热层包括两个半圆柱面形的电阻层4，两个半圆柱面形的电阻层4的上端相连，两个半圆柱面形的电阻层4的下端各有一个引出电极3。如图4所示，每个半圆柱面形的电阻层4设置有若干条自电阻层本体左侧边引出的横向的第一缝41a和自电阻层本体的右侧边引出的横向的第二缝41b，第一缝41a和第二缝41b的长度均小于电阻层本体的宽度，且沿轴线方向第一缝41a和第二缝41b交替排列，将电阻层本体分割成互相串联的若干横条，使半圆柱面形的电阻层4成为“弓”字形结构；上述横条中，位于基杆的上部的横条43和下部的横条44的宽度较窄，位于基杆的中部的横条42的宽度较宽。如图4所示，玻璃隔离层2的长度大于电阻层4加上引出电极3的长度，玻璃隔离层将电阻层及引出电极与基杆1相隔开；玻璃保护层5要短一些，玻璃保护层的下沿不盖住引出电极3的下半部。
这种内热式电子烟加热棒的结构中，由于位于基杆的上部的横条43和下部的横条44的宽度较窄，电阻较大，位于基杆的中部的横条42的宽度较宽，电阻较小，通电时电流相同，位于基杆的上部的横条43和下部的横条44的单位面积的发热量较中部的横条大，就能补偿加热棒的头部和尾部较大的散失的热量，从而使整根内热式电子烟加热棒温度均匀，得到好的加热效果。如图4所示，由于加热棒尾部散失的热量比头部大，所以基杆的下部宽度较窄的横条44的数量要设置得多一些。
这种电子烟加热棒还可以包括一个如图7和图8所示的方形的基座6，基座的中心有一个可套合在基杆1上的圆孔61，基座6的下底面上有两块L形的凸块62，如图9和图10所示，两块L形的凸块62位于圆孔61的两侧，L形的凸块62的L形的内凹部63朝向圆孔61。如图11所示，基座6套合并固定在基杆1的下部，位于引出电极3的外面，两个L形的凸块62分别正对着一个引出电极3的下半段。基座6用来将电子烟加热棒固 定到烟具上，基座6的底面上的L形的凸块62的内凹部63与引出电极3之间的空隙可用来安装引出导线：基座6套合并固定到基杆1的下部后，在L形的凸块62的内凹部63中注入一些导电浆，把引出导线7的一端插入L形的凸块62的内凹部63中，烧结后，引出导线7即与引出电极3相固定住，成为图12所示的结构。
这种内热式电子烟加热棒的基杆1和基座6可以用各种陶瓷来制作，如氧化铝陶瓷、氧化硅陶瓷、氧化锆陶瓷，首选氧化锆陶瓷，因为氧化锆陶瓷的热导率很低，一般为2～3W/(m·K)，可以有效提高升温速度、减少基座处的传热损耗、降低能耗。电阻层4和引出电极3可采用高TCR值的银钯浆料来制作。玻璃隔离层2和玻璃保护层5用来保护电阻层4，使其不被氧化。
这种内热式电子烟加热棒的电阻层4可以采用高精密圆柱面厚膜印刷法来制作，也可以采用先印在平面的氧化铝、氧化锆薄膜上再包裹到氧化锆棒上面共烧的方法来制作。采用高精密圆柱面厚膜印刷法制作的工艺流程如下：(1)在图5所示的氧化锆陶瓷基杆上印刷底层无孔玻璃隔离层浆料；(2)850℃烧结，得到玻璃隔离层2，成为图6所示的结构；(3)在玻璃隔离层上印刷电阻层4和电极3；(4)850℃烧结；(5)印刷玻璃保护层5；(6)850℃烧结；(7)用玻璃浆料将基座6粘好，在两个凸块62的内凹部63中注入导电浆，插入引出导线7；(8)650℃烧结。
这种内热式电子烟加热棒的参考尺寸为：基杆1长20mm，直径1.7～2.5mm；电阻层区域长12～13mm，电极区长4.5mm。每个半圆柱面形的电阻层4上有13～16条横条，其下部的横条44有6条，每条宽0.4～0.45mm，线间隙0.1～0.2mm；上部的横条43有2条，每条宽0.4～0.45mm，线间隙0.15mm；其余为中部的横条42，每条宽度0.9～1.1mm，线间隙0.15～0.2mm。这样的设计，在发热区布线长度13mm左右时，能获得长度大于10mm的330±10℃恒温区，满足内热式电子烟加热棒对温度场的要求。引出电极宽为2mm，电阻较小，在电阻层发热稳定在330℃时，基座温度小于100℃，使加热棒尾部散失的热量较小。银钯浆料的TCR值为1500～3000ppm/℃，在25℃环境下设计电阻为0.6～0.8Ω。通电发热后电阻随温度线性上升，可以通过检测当前电阻值来确定发热区的温度。
这种内热式电子烟加热棒的工作过程为：当常温时电阻为0.6Ω时，施加3.7V电压后，靠近基座处的下部的横条44提供了足够快的升温速度，可以在3秒以内将该处的温度提升到350℃，迅速烘烤烟丝，相当于传统抽烟过程先点燃头部，可以实现快速抽吸；温度上升后，TCR效应使电阻变大，功率迅速下降，可由控制线路依据检测到的当前电阻(也即是当前温度)调整施加的电压，随着发热及散热的平衡，中部的横条42处的温度也逐渐上升，靠近基座处的下部的横条44区域随着电压下降，温度也逐渐与中部区域达到平衡，通电20秒左右即能使10mm恒温区温度维持在330℃左右，保证抽吸过程的一致口感。在330℃恒温区达到10mm长度时，加热棒消耗功率仅为3W左右，满足内热式电子烟加热棒对低功耗的要求。

Claims (4)

  1. 内热式电子烟加热棒的电加热层结构，贴附于基杆(1)表面，其特征在于：包括两个薄膜状的相互电绝缘的第一电阻层和第二电阻层，第一电阻层和第二电阻层上垂直于基杆(1)的轴线方向称为横向，第一电阻层和第二电阻层的轴向上端互相电相连，第一电阻层和第二电阻层的轴向下端各有一个引出电极(3)，第一电阻层和第二电阻层各自包含一个电阻层本体；电阻层本体上设置有若干条自电阻层本体左侧边引出的横向的第一缝(41a)和自电阻层本体的右侧边引出的横向的第二缝(41b)，第一缝(41a)和第二缝(41b)的长度均小于电阻层本体的宽度，且沿轴线方向第一缝(41a)和第二缝(41b)交替排列，将电阻层本体分割成互相串联的若干横条。
  2. 如权利要求1所述的内热式电子烟加热棒的电加热层结构，其特征在于：位于上部的横条(43)和下部的横条(44)的宽度小于位中部的横条(42)的宽度。
  3. 如权利要求1所述的内热式电子烟加热棒的电加热层结构，其特征在于：第一电阻层的电阻层本体和第二电阻层的电阻层本体是相同的。
  4. 如权利要求1所述的内热式电子烟加热棒的电加热层结构，其特征在于：基杆(1)是圆柱形，第一电阻层的电阻层本体和第二电阻层的电阻层本体均为半圆柱面。
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