WO2018095121A1 - 一种电子吸烟器 - Google Patents

一种电子吸烟器 Download PDF

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Publication number
WO2018095121A1
WO2018095121A1 PCT/CN2017/102368 CN2017102368W WO2018095121A1 WO 2018095121 A1 WO2018095121 A1 WO 2018095121A1 CN 2017102368 W CN2017102368 W CN 2017102368W WO 2018095121 A1 WO2018095121 A1 WO 2018095121A1
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Prior art keywords
smoking device
electronic
heater
heating
electric heating
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Ceased
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PCT/CN2017/102368
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English (en)
French (fr)
Inventor
郭洪礼
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Shenzhen Yukan Technology Co Ltd
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Shenzhen Yukan Technology Co Ltd
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Application filed by Shenzhen Yukan Technology Co Ltd filed Critical Shenzhen Yukan Technology Co Ltd
Priority to JP2018535413A priority Critical patent/JP2019506857A/ja
Priority to GB1810404.2A priority patent/GB2561493A/en
Priority to EP17873061.0A priority patent/EP3375304A4/en
Priority to KR1020187022148A priority patent/KR20180099855A/ko
Publication of WO2018095121A1 publication Critical patent/WO2018095121A1/zh
Priority to US16/006,896 priority patent/US10993476B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/14—Tobacco cartridges for pipes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/17—Filters specially adapted for simulated smoking devices
    • 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
    • A24F40/42—Cartridges or containers for inhalable precursors
    • 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
    • A24F40/50—Control or monitoring
    • 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
    • A24F40/50—Control or monitoring
    • A24F40/53—Monitoring, e.g. fault detection
    • 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
    • A24F40/50—Control or monitoring
    • A24F40/57—Temperature control
    • 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
    • A24F40/90—Arrangements or methods specially adapted for charging batteries thereof
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F47/00—Smokers' requisites not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
    • A61M11/04—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised
    • A61M11/041—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised using heaters
    • A61M11/042—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised using heaters electrical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/06—Inhaling appliances shaped like cigars, cigarettes or pipes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0288—Applications for non specified applications
    • H05B1/0291—Tubular elements
    • 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
    • A24F40/20—Devices using solid inhalable precursors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
    • A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
    • A61M2016/0024—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with an on-off output signal, e.g. from a switch
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/008—Thermistors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/019—Heaters using heating elements having a negative temperature coefficient
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the present invention relates to smoking articles, and more particularly to an electronic smoking device.
  • Tobacco smoke contains at least three chemicals: tar, nicotine, and carbon monoxide.
  • Tar is a mixture of several substances that condense into a sticky carcinogen in the lungs.
  • Nicotine has a boiling point of 247 ° C. Nicotine is an addictive drug that is absorbed by the lungs and acts primarily on the nervous system. Carbon monoxide is produced by incomplete combustion of cut tobacco, which can reduce the ability of red blood cells to transport oxygen to the whole body, which is extremely harmful to the human body.
  • the smoking process except for the outer part of the cigarette, it is basically burned under the condition of insufficient oxygen supply.
  • the carcinogens such as tobacco tar are mostly produced at 500-900 °C, and the smoke tar and carbon monoxide generated during smoking are accompanied by smoke. Flow into the respiratory tract of smokers, causing harm to smokers.
  • the technical problem to be solved by the present invention is to provide an electronic smoking device which does not generate smoke tar and carbon monoxide during smoking.
  • the technical solution adopted by the present invention is an electronic cigarette maker comprising a power source, a controller and a heater, the heater is cylindrical, the middle includes a heating chamber into which the cigarette is inserted, and the heater includes at least one heating unit.
  • the heating unit comprises an electronic switch and a ring-shaped electric heating element; the electric heating element is connected to the power source through an electronic switch, and the control end of the electronic switch is connected to the control signal output end of the controller.
  • the heating unit comprises a thermistor, the electronic switch, the thermistor and the electric heating element are connected in series, one end is connected to the positive pole of the power source, and the other end is connected to the negative pole of the power source; the thermistor is arranged in the inner hole of the annular electric heating element.
  • the electronic smoking device described above comprises a plurality of heating units, and the electric heating elements of the plurality of heating units are connected in series in the axial direction to form a cylindrical heater; one of the control terminals of each heating unit electronic switch is connected to the controller Control signal output.
  • the electric heating element is an electric heating film or a heating wire.
  • the electronic cigarette maker described above includes a cylindrical casing, the heater is installed in the middle of the inner hole of the casing, the power source is a battery, the battery is installed at the rear end of the casing, and the front end of the casing is a hand-held portion.
  • the electronic smoking device described above includes a circuit board, a controller and an electronic switch disposed on the circuit board, and the circuit board is disposed at a rear end of the outer casing.
  • the electronic cigarette smoker of the invention uses an electric heater to heat the tobacco of the cigarette, the smoker can only suck the nicotine generated by the heating of the tobacco, the electric heater does not produce an open flame, and the heated tobacco does not produce the smoke tar and the carbon monoxide, Reduce the harm of tobacco to smokers.
  • Figure 1 is a front elevational view of an electronic smoking device in accordance with an embodiment of the present invention.
  • Figure 2 is a cross-sectional view taken along line A of Figure 1.
  • FIG. 3 is a circuit block diagram of an electronic smoking device in accordance with an embodiment of the present invention.
  • the structure of the electronic smoking device of the embodiment of the present invention is as shown in FIGS. 1 to 3, and includes a casing 1, a battery 5, a microcontroller MCU, and a heater.
  • the heater comprises up to four heating units, each heating unit comprising an electronic switch, a thermistor 2 and a ring-shaped electric heating element 3.
  • the electric heating element 3 may be an electric heating film or an electric heating wire.
  • the thermistor 2 is arranged in the inner bore of the annular electric heating element 3.
  • the electric heating elements 3 of the four heating units are connected in series in the axial direction to form a cylindrical heater, and the cylindrical shape is added.
  • the control ends of the respective electronic switches are respectively connected to a control signal output end of the microcontroller MCU, and the electronic switch may be a triode or a MOS tube.
  • the thermistor and the electric heating element are connected in series, one end is connected to the positive pole of the battery 5, and the other end is connected to the negative pole of the battery 5.
  • the outer casing 1 is cylindrical, the heater is mounted in the middle of the inner hole of the outer casing 1, the battery 5 is mounted on the rear end of the outer casing 1, and the front end of the outer casing 1 is a hand-held portion.
  • the microcontroller MCU and the electronic switch are arranged on a circuit board (not shown) which is arranged at the rear end of the casing 1.
  • the cigarette When the electronic cigarette maker of the above embodiment of the present invention is used, the cigarette is inserted into the cigarette heating chamber of the tubular heater, the filter is facing outward, and then the control circuit is started by the control circuit, and the microcontroller activates the heating element one by one from left to right.
  • the working temperature of the electric heating element is kept at a temperature of about 300 °C, which is less than the lowest temperature of 500 °C of tar.
  • the control circuit is started by the control circuit, and the microcontroller activates the heating element one by one from left to right.
  • the working temperature of the electric heating element is kept at a temperature of about 300 °C, which is less than the lowest temperature of 500 °C of tar.
  • the control circuit At this time, only nicotine is volatilized, and the smoker can suck the nicotine aerosol. Since there is no open flame, no carbon monoxide is generated, and the smoker does not. Smoke tar and carbon monoxide are pumped.
  • Each electric heating element works for a period of time, after the nicotine volatilization of the corresponding cigarette segment of the heating section is completed, the next electric heating element on the right side is started, and all the heating sections are stopped after the work is completed, waiting for the cigarette to be replaced.
  • the electronic cigarette smoker of the above embodiment of the present invention uses an electric heater to heat the tobacco of the cigarette.
  • the smoker can only suck the nicotine generated by the heating of the tobacco, the electric heater does not generate an open flame, and the heated tobacco does not generate the smoke tar and Carbon monoxide can reduce the harm of tobacco to smokers.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Control Of Resistance Heating (AREA)
  • Catching Or Destruction (AREA)

Abstract

一种电子吸烟器，包括电源、控制器和加热器，加热器为筒形，中间包括插入香烟的加热腔，加热器包括至少一个加热单元，加热单元包括电子开关和环形的电热元件（3）；电热元件（3）通过电子开关接电源，电子开关的控制端接控制器的控制信号输出端。采用电加热器对香烟的烟草进行加热，不产生明火，受热的烟草不会产生烟焦油和一氧化碳，可以降低烟草对吸烟者的危害。

Description

一种电子吸烟器 [技术领域]
本发明涉及烟具，尤其涉及一种电子吸烟器。
[背景技术]
烟草的烟雾中至少含有三种化学物质：焦油，尼古丁和一氧化碳，焦油是由好几种物质混合成的物质，在肺中会浓缩成一种粘性的致癌物质。尼古丁的沸点为247℃，尼古丁是一种会使人成瘾的药物，由肺部吸收，主要是对神经系统发生作用。一氧化碳为烟丝不完全燃烧产生，能减低红血球将氧输送到全身去能力，对人体有极大的伤害。
在吸烟过程中，除了纸烟的外层部分外，基本上都是供氧不足条件下燃烧的，烟焦油等致癌物多在500—900℃生成，吸烟过程中生成的烟焦油和一氧化碳，随烟流进入吸烟者的呼吸道，对吸烟者造成伤害。
[发明内容]
本发明要解决的技术问题是提供一种吸烟过程中不会产生烟焦油和一氧化碳的电子吸烟器。
为了解决上述技术问题，本发明采用的技术方案是，一种电子吸烟器，包括电源、控制器和加热器，加热器为筒形，中间包括插入香烟的加热腔，加热器包括至少一个加热单元，加热单元包括电子开关和环形的电热元件；电热元件通过电子开关接电源，电子开关的控制端接控制器的控制信号输出端。
以上所述的电子吸烟器，加热单元包括热敏电阻，电子开关、热敏电阻和电热元件串接后一端接电源正极，另一端接电源负极；热敏电阻布置在环形电热元件的内孔中。
以上所述的电子吸烟器，包括复数个加热单元，复数个加热单元的电热元件沿轴向串接在一起，组成筒形的加热器；每个加热单元电子开关的控制端接控制器的一个控制信号输出端。
以上所述的电子吸烟器，电热元件是电热膜或电热丝。
以上所述的电子吸烟器，包括筒状的外壳，加热器安装在外壳内孔的中部，所述的电源为电池，电池安装在外壳的后端，外壳的前端为手持部。
以上所述的电子吸烟器，包括电路板，控制器和电子开关布置在电路板上，电路板布置在外壳的后端。
本发明的电子吸烟器采用电加热器对香烟的烟草进行加热，吸烟者只能抽吸到烟草因加热产生的尼古丁，电加热器不产生明火，受热的烟草不会产生烟焦油和一氧化碳，可以降低烟草对吸烟者的危害。
[附图说明]
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是本发明实施例电子吸烟器的主视图。
图2图1中的A向剖视图。
图3是本发明实施例电子吸烟器的电路框图。
[具体实施方式]
本发明实施例电子吸烟器的结构如图1至图3所示，包括外壳1、电池5、微控制器MCU和加热器。
加热器包括至4个加热单元，每个加热单元包括一个电子开关、一个热敏电阻2和一个环形的电热元件3。电热元件3可以是电热膜或电热丝。热敏电阻2布置在环形电热元件3的内孔中。
4个加热单元的电热元件3沿轴向串接在一起，组成筒形的加热器，筒形加 热器中间是用于插入香烟10的加热腔6。
各个电子开关的控制端分别接微控制器MCU的一个控制信号输出端，电子开关可以是三极管或MOS管。
电子开关、热敏电阻和电热元件串接后一端接电池5的正极，另一端接电池5的负极。
外壳1为筒状，加热器安装在外壳1内孔的中部，电池5安装在外壳1的后端，外壳1的前端为手持部。
微控制器MCU和电子开关布置在电路板(图中未示出)上，电路板布置在外壳1的后端。
本发明以上实施例的电子吸烟器在使用时，将香烟插入到筒形加热器的香烟加热腔中，过滤嘴朝外，然后通过控制电路启动控制电路，微控制器从左到右逐个启动电热元件，电热元件工作温度恒温在300℃左右，不到产生焦油500℃的最低温度，此时，只有尼古丁挥发，吸烟者可以抽吸到尼古丁气雾，因为没有明火，不会产生一氧化碳，吸烟者不会抽吸到烟焦油和一氧化碳。每个电热元件工作一段时间，该加热区段对应的香烟段尼古丁挥发完毕后，再启动右边下一个电热元件，等所有的加热区段都工作完毕后停机，等待更换香烟。
本发明以上实施例的电子吸烟器采用电加热器对香烟的烟草进行加热，吸烟者只能抽吸到烟草因加热产生的尼古丁，电加热器不产生明火，受热的烟草不会产生烟焦油和一氧化碳，可以降低烟草对吸烟者的危害。

Claims (6)

  1. 一种电子吸烟器，包括电源，其特征在于，包括控制器和加热器，加热器为筒形，中间包括插入香烟的加热腔，加热器包括至少一个加热单元，加热单元包括电子开关和环形的电热元件；电热元件通过电子开关接电源，电子开关的控制端接控制器的控制信号输出端。
  2. 根据权利要求1所述的电子吸烟器，其特征在于，加热单元包括热敏电阻，电子开关、热敏电阻和电热元件串接后一端接电源正极，另一端接电源负极；热敏电阻布置在环形电热元件的内孔中。
  3. 根据权利要求1所述的电子吸烟器，其特征在于，包括复数个加热单元，复数个加热单元的电热元件沿轴向串接在一起，组成筒形的加热器；每个加热单元电子开关的控制端接控制器的一个控制信号输出端。
  4. 根据权利要求1所述的电子吸烟器，其特征在于，电热元件是电热膜或电热丝。
  5. 根据权利要求2所述的电子吸烟器，其特征在于，包括筒状的外壳，加热器安装在外壳内孔的中部，所述的电源为电池，电池安装在外壳的后端，外壳的前端为手持部。
  6. 根据权利要求5所述的电子吸烟器，其特征在于，包括电路板，控制器和电子开关布置在电路板上，电路板布置在外壳的后端。
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